Wheel Bearing Clutch Bearing

 Home company specializing in sales of imported Bearing manufacturer, the company with solid strength to become world famous bearing manufacturer authorized dealer, is committed to Sweden SKF Bearing, Japan NSK Bearings, NTN bearings, KOYO bearings, IKO bearings, NACHI bearings, South Korea SAMICK bearings, Germany FAG bearings and INA bearings, TIMKEN the United States and other international well-known products in China market.
Our company since its inception to quality pre-sales technical support and after-sale tracking service to every customer, adhering to the "honest and trustworthy, customer first" corporate purposes, to comply with "honest, pragmatic, win-win" business philosophy, to provide give customers the best quality service and the best product quality.
Faced with increasingly fierce market competition, the company constantly improve themselves, growing, selling industries involved: metallurgy, petrochemical, power, mining machinery, construction machinery, road construction machinery, steel, railways and other fields. Shengda Rui Bearing Co., Ltd. has a approved professional high-tech personnel, integration of internationally renowned company's management model and corporate culture, and actively explore the market, from the model confirmed that the brand conversion, to the customer after ordering the correct installation, maintenance and reasonable use of library equipment, effective inventory management system, efficient transportation security, etc. to provide customers with comprehensive services.
Mester Bearing has nearly 19,000 varieties of high quality and reasonable inventory, excellent sales team, professional services engineers, efficient logistics to send, honest, professional, giving you more choices.
Mester Bearing User expectations and establish long-term cooperative relationship, and hopes to become user-trusted friend.

Based on the bearing industry, the long-term exploration and practice

Tianjin Mester Precision bearing Co., Ltd. mainly engaged in Sweden SKF Bearing, the United States TIMKEN bearings, Germany FAG bearings, INA Bearing, Japan NSK Bearings, NTN bearings, KOYO bearings NACHI bearing, IKO needle roller bearings, Korea SAMICK linear bearings and other bearings, world brand bearings.
Company to supply the full range of bearings: deep groove ball bearings, aligning ball bearings, spherical roller bearings, cylindrical roller bearings, tapered roller bearings, needle roller bearings and combined needle roller bearings, angular contact ball bearings, thrust ball bearings , thrust roller bearings, spherical bearings, linear motion bearings, rolling screw bearings, forklift bearings. Product range, thereby protecting meet your needs!
From the brand conversion, to the model confirmed that our professional sales engineers will provide you with patience and meticulous service. Warehouse perennial with large bearing spot for the timely delivery provide a strong guarantee. Based on the bearing industry, the long-term exploration and practice, we are deeply comprehend the bearing industry sales of the key that lies in inventory, and reasonable scientific inventory was extremely difficult to grasp. Limited to the minimum necessary to cope with the next stock trading, it is where our experience and skills. We have been committed to being produced as a bridge between manufacturers and users, and adhere to all the friends to provide the bearing industry the most core services - quality, efficient product supply.

Motorcycle bearing forklift bearing

 Tianjin Mester zys precision bearing Co., Ltd. is a professional sales and inventory bearing company. Long-term agency management of imported bearings, Sweden SKF, Japan NSK, NTN, NACHI, IKO, KOYO bearings, Germany FAG, INA bearings, Korea SAMICK bearings in China authorized agents. Agents complete specifications, diameter from 1 mm to 500 mm diameter various levels of precision, use, performance specifications are tens of thousands of high-quality bearing large inventory. Widely used in metallurgy, mining, electricity, machinery manufacturing, printing, textile, food, pharmaceutical, chemical and household appliances, variety, class rich, with many well-known enterprises to establish a good relationship, to meet the diverse needs of customers

 Company to supply the full range of bearings: deep groove ball bearings, aligning ball bearings, spherical roller bearings, cylindrical roller bearings, tapered roller bearings, needle roller bearings and combined needle roller bearings, angular contact ball bearings, thrust ball bearings , thrust roller bearings, spherical bearings, linear motion bearings, rolling screw bearings, forklift bearings. Product range, thereby protecting meet your needs!
    From the brand conversion, to the model confirmed that our professional sales engineers will provide you with patience and meticulous service. Warehouse perennial with large bearing spot for the timely delivery provide a strong guarantee. Based on the bearing industry, the long-term exploration and practice, we are deeply comprehend the bearing industry sales of the key that lies in inventory, and reasonable scientific inventory was extremely difficult to grasp. Limited to the minimum necessary to cope with the next stock trading, it is where our experience and skills. We have been committed to being produced as a bridge between manufacturers and users, and adhere to all the friends to provide the bearing industry the most core services - quality, efficient product supply.

Nylon bearing plastic bearing steel bearings

Mainly engaged in Sweden SKF Bearing, the United States TIMKEN bearings, Germany FAG bearings, INA Bearing, Japan NSK Bearings, NTN bearings, KOYO bearings NACHI bearing, IKO needle roller bearings, Korea SAMICK linear bearings and other bearing manufacturer  bearing the brand around the world.
Company to supply the full range of bearings: deep groove ball bearings, aligning ball bearings, spherical roller bearings, cylindrical roller bearings, tapered roller bearings, needle roller bearings and combined needle roller bearings, angular contact ball bearings, thrust ball bearings , thrust roller bearings, spherical bearings, linear motion bearings, rolling screw bearings, forklift bearings. Product range, thereby protecting meet your needs!
From the brand conversion, to the model confirmed that our professional sales engineers will provide you with patience and meticulous service. Warehouse perennial with large bearing spot for the timely delivery provide a strong guarantee. Based on the bearing industry, the long-term exploration and practice, we are deeply comprehend the bearing industry sales of the key that lies in inventory, and reasonable scientific inventory was extremely difficult to grasp. Limited to the minimum necessary to cope with the next stock trading, it is where our experience and skills. We have been committed to being produced as a bridge between manufacturers and users, and adhere to all the friends to provide the bearing industry the most core services - quality, efficient product supply.

The Company equipment, advanced detection equipment,

Auto Bearing Wheel Hub Bearing Clutch Bearing tensioner bearing motorcycle bearing forklift bearing
Main imported brands:
Sweden SKF wheel bearing Germany FAG bearings, INA Bearing, Japan NSK Bearings, NTN bearings, KOYO bearings, IKO bearings, NACHI bearings, Korea SAMICK bearings TIMKEN the United States.
Our products are widely used in automotive, electrical, petrochemical machinery, engineering machinery, mine machinery, steel, railways, textile machinery and agricultural machinery, etc.
Company adequate supply, inventory rich, convenient transportation, warmly welcome new and old customers to negotiate
Our company is engaged in the imported bearings sales of specialized companies, selling brands: Swedish SKF, strength of the company, inventory rich, abundant supply, convenient traffic, hope there is a need to cooperate with us.
modern business model, to provide users with high-quality bearing products. Implementation of brand strategy, occupy domestic market. The company specializes in the development of products bearing the design, manufacture and sale, in strict accordance with GB \ T307.3--2005 national standards Class 0 70 kinds of specifications of bearing products. The Company equipment, advanced detection equipment,

Auto bearing manufacturerWheel Hub Bearing Clutch Bearing tensioner bearing motorcycle bearing forklift bearing
Main imported brands:
Sweden SKF Bearing, Germany FAG bearings, INA Bearing, Japan NSK Bearings, NTN bearings, KOYO bearings, IKO bearings, NACHI bearings, Korea SAMICK bearings TIMKEN the United States.
Our products are widely used in automotive, electrical, petrochemical machinery, engineering machinery, mine machinery, steel, railways, textile machinery and agricultural machinery, etc.
Company adequate supply, inventory rich, convenient transportation, warmly welcome new and old customers to negotiate
Our company is engaged in the imported bearings sales of specialized companies, selling brands: Swedish SKF, strength of the company, inventory rich, abundant supply, convenient traffic, hope there is a need to cooperate with us.
non-standard bearings, automobile wheel hub bearings, automobile clutch bearings, needle roller bearings, mainly of high carbon steel bearing and material GCr15 chrome steel bearings. Products exported Middle East, Southeast Asia, Africa, Europe, more than thirty countries and regions, deeply domestic and foreign customers praise and trust. West County is the largest bearing manufacturers, is Pro West county government awarded the "bearing enterprises", "private taxpayer" title. Similar products of the same type of business best price, portability Qiuwen Rong, general manager of the staff warmly welcome new and old friends to visit our factory and negotiate business

Wafangdian Bearing Manufacturing Co. Ltd.

 located in northern Liaoning suburb, home of Wafangdian Bearing The company occupies 40,000 square meters, has a variety of large, medium and small equipment. Mine mill mainly produces bearings, Wafangdian zys precision bearing Manufacturing industry is one of the key enterprises.
The company has strong product design capabilities, workers have to undergo professional training posts. Physique with modern management and advanced technology level, with a full range of bearings measuring and testing instruments, according to the user's requirements design and development of new products. Optimized for bearings, enhanced treatment, enhanced bearing life, shortening the production cycle.

The company produces high quality steel bearings used in all, 100% after the testing process. In strict accordance with the production process planning, implementation of the national Ministry of bearings and mechanical industry standards. Products sold at home and abroad, with outstanding quality achieved a good reputation, well received by users.

In order to achieve better use of bearing effect, the company has introduced advanced professional production line of low-carbon hardened steel, carburizing laboratories equipped for steel carburizing, quenching and effective hardened layer depth control, fully in accordance with the national standard penetration Carbon heat treatment technology conditional execution.

Northern Wafangdian Bearing Manufacturing Co., Ltd. registered trademark "WBFZ", and passed the ISO9001-2000 Beijing New Century Certification Center Quality Assurance System certification. The Company after 10 years of continuous development. For the major steel mills, such as Anshan Iron and Steel, Laiwu Steel, Ling Steel, Jinan Iron and Steel, etc., some large and medium-sized iron and steel enterprise production rolling mill rolls with four cylindrical, conical, angular contact, deep groove ball thrust tapered rolling bearings, etc., production of varieties has reached more than 2,000 species. Northern Wafangdian Bearing Manufacturing Co., known for its strict management, and strengthen awareness of sales, the implementation of the "new products, shippers fast, excellent quality, reasonable price, the word" class product quality, reliable reputation is the market of choice.

At present, the outer roller 12 or 20 roller cold rolling mill (Sendzimir) production of precision sheet is widely used in construction, automobiles, household appliances and other industries, the use of backing bearing all rely on imports, WBFZ after several years of restructuring and innovation designed and produced a variety of cold rolling mill bearings used in backing, proven using fully reached international advanced level, replace imports for China's bearing industry to fill the gap, the development of China's iron and steel machinery industry has played an important role in .

Our quality objectives are: products manufactured pass rate of 100% customer complaint handling rate of 100%. We will tax law, law-abiding operators. Sincerely hope new and old customers to give strong support and friendly cooperation.

Instrument Co.

 Ltd. is located in Sanmenxia City, Henan Province, is engaged in development and manufacture of precision measuring instrument specialist.

The company is mainly engaged pneumatic bearing manufacturer  electrical measurement, gas power measurements, integrated measurement, statistical process control (SPC) and Measurement System Analysis (MSA) and other aspects of development and manufacturing. Professional services in the automotive, motorcycle, air conditioning compressor (cooler), bearings, textile machinery, military, aerospace and scientific research institutes and other precision machining.

The company employees dedicated to domestic machining, and other types of measurement and control technology products with the needs of enterprises, to provide quality products and excellent technical support service!

Is a professional development, design, production and operation of bearings.

Founded in the late 1980s. Since the establishment of our company with advanced production technology support and after-sale tracking service to every customer, adhering to the "honest and trustworthy, customer first" corporate purposes, to comply with "honest, pragmatic, win-win" sales philosophy to provide customers with the most competitive price and the best quality of products. Faced with increasingly fierce market competition, the company constantly improve themselves, growing, Honghai company produces spherical bearings, tapered roller bearings, angular contact bearings, deep groove ball bearings, aligning ball bearings, spherical roller bearings , thrust ball bearings based. The company's products have passed the ISO9000: 2000 quality management system certification. Production lines using the most advanced equipment, more than 90% degree of automation, advanced process technology, detection means complete, perfect quality Bearing manufacturer system. The adoption of international standards technical quality standards, advanced manufacturing technology and modern science and technology management tools, to provide customers with high quality products. "FE, FKD, HHB" Company brand. Our products are widely used in agricultural machinery, mining machinery, textile machinery and construction machinery sales network throughout the provinces, USA, Brazil, Switzerland, Arabia, Iran, Turkey, Pakistan, Malaysia, Bangladesh, Egypt, Nigeria, Hong Kong, Taiwan and France.
        Honghai company vigorously promote "unity, mutual assistance, cooperation and win-win" corporate culture, adhere to the people-oriented, focus on the introduction of professionals, strengthen staff training, improve staff quality, and enhance the competitiveness of enterprises. Corporate Zhang Honghai staff sincerely hope that the majority of users at home and abroad sincere cooperation, common development!
        Let's acquaintance, cooperation, work together on the road to success! Your demand is our chase

Double row self-aligning ball bearing axial clearance measurement instruments to improve

   Radial clearance for X093 instrument to clutch bearing the design of the measuring-aligning ball bearing radial clearance instrument accessories a sleeve, and the sleeve of the application for data analysis, to explore the feasibility

Service

Service

     1. Establish an awareness, awareness of market competition, and strengthen the concept of customer first, the user's satisfaction for manufacturers to solve problems as our point of departure, the end.

     (2) The quality of our products "three guarantees" and promised: in case of quality discrepancy, 24-hour telephone response, someone rushed to the scene within 48 hours of service.

     3 Regular visits to customers, wheel bearing o the use of questions, comments promptly corrected.

Bearings

 Is specialized in manufacturing large, extra large bearing manufacturer and wheel bearings. We have experienced the bearings business managers, senior engineers, senior engineers, senior technicians and other production technology. Independently of the user selection, design, manufacture all kinds of bearings, users can also develop non-standard and alternative bearings, repair any loss of precision bearings. Product range is OD: Ф300-Ф6000mm.
     Our products cover a precision P0, P6, P5, P4 four grades. 2003 passed the ISO9001 quality system certification. Standard: General Bearing GB/T307; slewing JB/2300; shipbuilding industry CB/T3669; machinery industry JB/T10471; wind power bearing JB/T10705.

     The company has six meters CNC vertical lathe, 5 m vertical lathe vertical lathe and professional grinding, 3.5 m vertical lathe vertical lathe and professional grinding, 2.5 m vertical lathe, 1.6 m vertical lathe, sleeper, 4 m hobbing machine, 1.6 m CNC gear shaper, 800mm CNC gear shaper, drilling and milling machine, Z3050 drilling, Z3080 drilling, 2.5 m floor grinder, M280 internal Grinder, M250 internal Grinder, M74100 surface grinder, M74125 surface grinder, M1083 centerless cylindrical grinding machine, 3M2180 / 8 cylindrical Grinder, 1.75 m vertical mill machining center MX-1800, etc., production and processing capacity could reach 150 million yuan.

      In recent years the company has developed a large number of leading domestic and international advanced level of bearing new products, and access to the relevant core technologies with independent intellectual property rights, which greatly enhanced the quality level of product technology and enterprise's core competitiveness. The company has been formed to aerospace bearings, wind turbine bearings, rolling bearings, bearing large medical equipment, oil rig bearings, bearing port machinery, metallurgical machinery bearings, engineering machinery bearing as the representatives of high-reliability, high-tech, high-value-added niche products group.

     Our products are mainly exported to: USA, Russia, Germany, India, Italy, Norway, Czech Republic, Brazil, Spain, the Netherlands, South Korea, more than ten countries.

Zhe Jiang Dingli Holding Group is the backbone enterprises

 Covers an area of ​​35,000 square meters, with assets of more than 18,000 yuan, more than 600 employees, which is in the title of senior professional and technical personnel more than 90 people, professional production of automotive bearings, motorcycle wheel bearing, universal machine bearings, precision machine tool bearings and home appliances bearings, with an annual output of 80 million sets of the production capacity of small and medium sized bearings, is a national key high-tech enterprises.
The company's research and development center special bearings has been identified as the Zhejiang provincial high-tech research and development centers. Our development and production of motorcycle engine crankshaft bearings, automobile engine tensioner bearing, auto air conditioning electromagnetic clutch bearings, automotive bearings, gearboxes reached domestic leading level, are classified as "National Key New Product", "National Torch Plan Project" or "key national Torch Program projects." And as the main drafting units participated in the "car engine tensioner bearing" and "automotive air conditioning electromagnetic clutch bearings" and many other industry-standard drafting, with a number of national patents.
The company has a processing mill super-automatic production line, automatic production assembly lines and other advanced production and processing equipment more than 600 sets of cold rolling with a ring, cage nitriding treatment and other advanced techniques and technologies, conduct 100% inspection on the ferrule checks. Econometric Analysis of the company, testing means complete, has been identified as two units of measurement.
Company attaches great importance to quality management and environmental management, namely through 2004 ISO/TS16949: 2002 quality system certification and ISO14001 environmental management system certification audits and cleaner production audit inspection in Zhejiang Province, Zhejiang Province, was awarded the advanced green enterprise and clean production enterprises .
The company has a sound sales network and perfect after-sale service system, products for domestic and international long-term large auto, motorcycle enterprise group support, and entered the Japanese Honda, U.S. Visteon, Ford, Whirlpool and other multinational global procurement system.
Firm faith demonstration enterprise in Zhejiang Province, Zhejiang Province, the Agricultural Bank for eight consecutive years was awarded "AAA" grade enterprise and the "golden client" company "eight ring" brand bearing the famous brand in Zhejiang Province, eight rings famous trademark was named Zhejiang trademark.
Company is located in Zhejiang Province, an important industrial, commercial and tourist city Luqiao, strategic location and convenient transportation.

Verification

bearing manufacturer of soldering iron temperature tester should be based on a point of order or specification
   If your instrument with digital display, use JJG617-1996 Digital Temperature Indicators and Controllers test procedures, test procedures currently in force, the general number of this instrument should all be obvious

Verification and calibration

Verification and calibration of soldering iron temperature tester slewing ring be based on a point of order or specification
   If your instrument with digital display, use JJG617-1996 Digital Temperature Indicators and Controllers test procedures, test procedures currently in force, the general number of this instrument should all be obvious

verification and calibration

bearing manufacturer measuring instrument calibration verification and calibration specifications based on order, but bearing measuring instrument procedures and norms are many different types of bearing instruments have different rules or norms

Bearing measuring instruments directly measure and compare measurements mean?

   The so-called direct measurement, popular talk is that it can be read directly from the instrument measured values​​, such as calipers, length measurement, etc.; comparative measurement is through comparison with the standard, measured test the difference between products and standard parts, and then calculate the measured value of a method. In general, comparing the measured bearing manufacturer measurement used more, because the measurement convenient and efficient. More, because the measurement convenient and efficient.

Bearing measuring instruments

The so-called direct measurement, popular talk is that it can be read directly from the instrument measured values​​, such as calipers, length measurement, etc.; comparative measurement is through comparison with the standard, measured test the difference between products and standard parts, and then calculate the measured value of a method. In general, comparing the measured Precision bearing measurement used more, because the measurement convenient and efficient.

Huaneng Shaanxi overhaul inspection company with brand strength to create Cheng Yuncheng

   Company 100 employees officially slewing bearing in Tongchuan Huaneng Thermal Power Plant. Zhezhi overhaul Legion, since the plant will take up two 60 long-term

Wan thermal power units repair and maintenance work. At this point, Huaneng overhaul the company's external contract projects reached 11, the total installed capacity

Reached 4.05 million kilowatts, foreign personnel carriers to the seizure of more than 1,000 people.

Huaneng Maintenance Company from 2009 began to build to today, we are pleased to see that Huaneng Maintenance Company has entered scientific development

Track, work steadily, a big year, under three years. 2009 operating income of 36.09 million yuan enterprises; 2010

Annual operating income of 56.77 million yuan, an increase of 57%; 2011 operating income of 80.12 million yuan, an increase of 41%.

Expected this year, Huaneng overhaul the company value will exceed billion, Huaneng overhaul the company's profitability continued to improve

The monitoring by the Sichuan Provincial Product Quality Supervision and Inspection and Testing Institute for the seizure,

  Chengdu, China Quality News Network News Administration for Industry and Commerce for the fourth quarter of 2011, Jinjiang, Metropolis, Pi, Taurus

, Metropolis and other places supermarkets and specialty markets, specialty shops and other establishments selling goods heater quality monitoring carried out. The

Monitoring by the Sichuan Provincial Quality Supervision Inspection and Testing Institute for the seizure, the main protection against access to live parts, the input power and current

, Operating temperature Leakage current and electric strength, resistance to moisture, leakage current and electric strength, stability and mechanical hazards,

Mechanical slewing bearing  structure, internal wiring, power connection and external flexible cords, grounding, and other 13 non-work projects

Tested. The results showed that some products failed, the main problems are: signs and instructions for access to live parts

Protection, input power and current, non-working, power connection and external flexible cords, grounding, stability and mechanical hazards

.

Continuously improve juvenile criminal prosecution system

In recent years the rise of juvenile crime, some members asked about the prevention and reduction of juvenile delinquency

Proposal. Supreme People's Procuratorate, after careful research, revised the "People's Procuratorate provisions of juvenile criminal cases" and formulated the

"On the procuratorial work Tempering Justice with Mercy clutch bearing Justice Policy a number of opinions", "handle minor penalty on the legal fast

Matters of opinion ", the establishment of juvenile delinquency cases progress reports, arrest ENTs, family meeting, minutes

Charged, social surveys and other systems, and study conditions attached to non-prosecution system to further strengthen the criminal offenses against minors

Litigation activities of legal supervision. Last September, the Supreme People's Procuratorate and the Supreme People's Court, the CYL Central Committee and other departments jointly signed

"To further establish and improve the handling of juvenile criminal cases supporting the work system, number of opinions", to promote the protection of

Improvement of Legal System of minors

Zuigao Jian contractors 100 motions

 suggestions and proposals contained in the specified period settles
    Increase agriculture-related crimes investigation and prevention efforts

The deputies and members highly concerned "three rural" issue, the proposed increase agriculture-related crimes investigation efforts. Supreme People's Procuratorate attached great importance to

Twice held a national teleconference on procuratorial organs, procuratorial organs to carry out in-depth investigation and handling of agriculture-related crimes make special work

Deployment. Procuratorial organs at all levels of study and formulate a series of special work investigating crimes related to agriculture specific programs, according to the law dealt with a one

Batch agriculture-related corruption and bribery cases. Supreme People's Procuratorate has also developed and issued the "Supreme People's Procuratorate on Further Improving the agriculture-related

Crime prevention work, service wheel bearing a new socialist countryside, "which called attention to clues found in agriculture-related crimes, and actively

Made recommendations for prevention.

Continuously improve juvenile criminal prosecution system

Materials Technology

 Provincial High Performance Fibre Product Testing Center for the first time for the seizure of high-quality aerospace grade carbon fiber
    Recently, the provincial high-performance Fibre Product Testing center through the Shanghai Composite Materials Technology Co., Ltd. (Shanghai Aerospace Composite Materials Technology Center

) Service Provider evaluation system assessment, as the company produces aerospace carbon fiber clutch bearing materials used in the designated inspection agency.

This is the center for the first time to undertake the level of carbon fiber detection tasks.
  Shanghai Composite Materials Technology Co., Ltd. (Shanghai Aerospace Composite Materials Technology Center) is specialized in aerospace composite parts

Research, development and production of military enterprises, the company's carbon fiber composite materials are widely used in production of various types of aerospace

Products, the use of carbon fiber multi-from Japan, USA, China Taiwan region imports of high-quality carbon fiber, complex product categories

Detect high technical requirements. In order to pass the company's strict supplier evaluation system assessment, establishment of provincial high-performance Fibre Product Testing Center

Technical group, and strengthen the ability to detect technical staff training, carbon fiber products on foreign standards and technical specifications of the special

Research. The company provides multiple blind comparison test, test data center issued abroad by the company and the relevant inspection

Measurement mechanism than fully meet technical requirements for smoothly as the company's service provider

Service supplier evaluation system assessment, becoming the company produces

Materials Technology - Provincial High Performance Fibre Product taper roller bearing Center for the first time for the seizure of high-quality aerospace grade carbon fiber
   Recently, the provincial high-performance Fibre Product Testing center through the Shanghai Composite Materials Technology Co., Ltd. (Shanghai Aerospace Composite Materials Technology Center)
 aerospace carbon fiber composite materials used in the designated inspection agency. This

Is the center for the first time to undertake the level of carbon fiber detection tasks.

Shanghai Composite Materials Technology Co., Ltd. (Shanghai Aerospace Composite Materials Technology Center) is specialized in aerospace composite parts and

Pieces of research, development and production of military enterprises, the company's carbon fiber composite materials are widely used in various types of aerospace

Products, the use of carbon fiber multi-from Japan, USA, China Taiwan region imports of high-quality carbon fiber, complex product categories

Miscellaneous, detection technology demanding. In order to pass the company's strict supplier evaluation system assessment, the provincial high-performance Fibre Product Testing Center was established

The technical group, and strengthen the training of technical personnel detection capability, carbon fiber products on foreign standards and technical specifications designed

Studies. The company provides multiple blind comparison test, test data center issued abroad by the company and the relevant

Testing organization compared to fully meet the technical requirements, successfully become the company's service provider

Drive belt tensioning device

   The utility model relates to a drive belt tensioning device for diesel engine belt, belt drive multiple attachments belonging to an auxiliary device. Its main use of the lower end of the idler wheel bracket connected through a clutch bearing tensioner, idler bracket inside the trap on the idler wheel worm gear, worm gear engages the bolt and tensioner. The utility model simple and compact structure, convenient operation and reliable performance; diesel engine in the car, such as the use of a belt drive multiple attachments at the same time, the installation of this device, you can improve the reliability of the belt drive and efficiency; and extend the life of the belt,

Tapered roller bearings and needle roller bearing structure and its fundamental difference

  Tapered roller wheel bearing can be separated from the inner ring with roller and cage components together and the outer ring can be installed separately. Roller and raceway contact at the contact line can reduce the stress concentration. Tapered roller bearings can withstand high radial and axial load. The tapered roller bearings can only pass one-way axial load, so as to pass the opposite direction of the axial load on the need install another with symmetrical tapered roller bearings. The needle bearing (needle bearing) is a cylindrical roller with roller bearings, relative to its diameter, roller both thin and long. This is called needle roller. Despite having a smaller cross-section, has a higher load bearing capacity, therefore, especially suitable for the radial space-constrained applications.
Different structures, different types, different direction of the force to withstand, at different speeds, different loads, different materials, the application of different occasions etc.
Fundamental difference: tapered roller bearings rolling body is tapered roller; needle roller bearings needle roller is rolling;
These fundamental difference determines the structure of tapered roller bearings Needle roller bearings relative to a large, tapered roller in addition to radial force than can withstand axial force, and needle roller bearings can withstand radial forces;
Single row tapered roller bearings are double row and multi-row, were applied to different environments and situations;
Tapered roller bearings Needle roller bearings with respect to higher operating speed;
Tapered roller bearings are generally of high quality bearing steel and special steel; rather thin needle roller bearing is used in steel stamping;
In short, these two types of bearings are not the same type of bearing, there are too many different, have some really far-fetched comparison
Needle roller bearings are long thin needle roller and cage. Cylindrical roller bearings. Is composed of cylindrical and rollers. Column than the needle thick, also known as coarse needle.

Resolution angular contact ball bearings and step visual inspection

 Angular contact ball bearings (Angular Contact Ball Bearings) both radial and axial loads. In high speed work. Larger the contact angle, the higher the axial load capacity. In the use of angular contact ball bearings, we first check the appearance of imported bearings, to determine whether it conforms to the standard we require. Here to share with everyone one that we should check that those parts. Angular contact ball bearing manufacturer should be checked for astigmatism lamp, the appearance of the bearings, cracks and other parts of careful observation.
1, various mechanical injuries, such as rubs, scratches, bruised, bumps, etc., can cause adverse bearing installation, causing partial load and stress concentration, resulting in a decline in rotation accuracy and service life.
2, rust, black and pits, the latter two are easy to store moisture and dirt defects, the most likely to develop into rust. The corrosion is the cause poor installation, the sources of early wear and fatigue, severe corrosion cause bearing scrap.
3, various cracks, such as raw materials, crack, crack forging, heat treatment and grinding cracks, cracks, these cracks in the future during the operation of the bearing, will be a source of stress concentration and rapid expansion, resulting in rupture of the bearing of the bearing life and safety at work of great impact. In fact, for the important purpose bearings, bearing factory has 100% of its constituent parts or ray magnetic particle inspection.
4, peeling and folding, these two defective part and base metal binding is not strong, and its surroundings often exist to varying degrees, or depleted carbon decarburization phenomenon, materials easy caving, debossing or wear of the bearing life and accuracy are negative.
5, riveted or welded cage quality rivet head is mainly observed deviation, skew, relaxation, lack of meat or 'eyelid', the correct position of the welding, solder joint is too large or too small, whether strong or welding welding caused by excessive stuck rolling phenomenon more than a few of our checking angular contact ball bearings in part focus on examination, in addition to some other than the above checks, in addition to poor quality such as typing, such as illegible, damaged, should be considered sub- goods can not be serious acceptance.

Electric drive POWER DRIVE5 kN fatigue testing machine,

Mechanical structure, including the support frame with a double column;
Work table with T-slot Bearing manufacturer bolts or M12
Column spatial distance 750 mm (or 530 mm)
Crosshead adjustable up to 825 mm
Machine size 2.600x1200x1050 mm (HxWxD)
Machine weight approx. 1500 kg
POWER DRIVE drive system control unit
Electric actuator:
        Stroke = 150 mm
        Static load = 3,5 kN
        Dynamic load = approx. 5 kN
        Speed ​​vmax = 0,5 m / s
        Sensor nominal load F = 5 kN
        Nominal stroke displacement sensor = 150 mm
Computer Systems
     22 "-TFT-Monitor; optical mouse
        4 GB RAM; 250 GB harddisk; 1 GB graphic card
     DVD-drive; network on board; front-USB
Software DRIVER MOTION (PC type)

Analysis of deep groove ball bearing cage rivet Fracture

  Deep groove ball bearings are bearing the most common type. Basic deep groove ball bearing is composed of an outer ring, an inner ring, a set of balls and a group holding structure into. Deep groove ball bearing type has two kinds of single and double row, single row deep groove ball bearing type code 6, double row deep groove ball bearing code is 4. Its structure is simple, easy to use, is the production of the most common, the most widely used class bearings.
Deep groove ball bearings usually consists of four main components parts, namely the inner sleeve, jacket, rolling element cage. The role of the cage is kept running deep groove ball bearing rolling elements in the correct position, bearing cage once the damage usually occurs as a whole will cause bearing failure. Sometimes due to cage breaking the rolling crushing, even bearing locking will cause accidents. Visible in the bearing retainer role can not be ignored. As the link rivet holder, it is a reliable operation of the protection cage, if broken will cause damage to the cage. Deep groove ball bearings delivered to customers after 300h, rivets cage fracture occurs, the customer will be returned to the manufacturer bearing failure analysis of its cage rivet fracture causes.
(1) deep groove ball bearing manufacturer, coat ring and ball materials meet GB/T18254-2002 national standards set forth in GCr15 steel composition, heat treatment quality in line with JB1255 requirements.
(2) deep groove ball bearings work appear unusual axial vibration impact is caused by bearing failure and rivet fracture the root causes.

Bearing test machine and test technology

From the test, load, drive and control technology, and introduces the bearing testing machine testing techniques, and an example of the life test machine, Simulator, aviation, aerospace wheel bearing test machine and test methods. Finally, China's bearing testing machine test technology development prospect.
With the growing recognition of the importance of bearing test, the manufacturer of the bearing test requirements are also increasing. In the product development stage to do structural testing, inspection and bearing can meet the requirements of their working conditions, mainly on the bearing structure of the assessment. Product type, the test mainly for bearing quality assessment, identification of its quality grade, find bearings in the structure, materials, manufacturing processes and other aspects of the weak links, and

Analysis of deep groove ball bearing cage rivet Fracture

  Deep groove ball clutch bearing are bearing the most common type. Basic deep groove ball bearing is composed of an outer ring, an inner ring, a set of balls and a group holding structure into. Deep groove ball bearing type has two kinds of single and double row, single row deep groove ball bearing type code 6, double row deep groove ball bearing code is 4. Its structure is simple, easy to use, is the production of the most common, the most widely used class bearings.
Deep groove ball bearings usually consists of four main components parts, namely the inner sleeve, jacket, rolling element cage. The role of the cage is kept running deep groove ball bearing rolling elements in the correct position, bearing cage once the damage usually occurs as a whole will cause bearing failure. Sometimes due to cage breaking the rolling crushing, even bearing locking will cause accidents. Visible in the bearing retainer role can not be ignored. As the link rivet holder, it is a reliable operation of the protection cage, if broken will cause damage to the cage. Deep groove ball bearings delivered to customers after 300h, rivets cage fracture occurs, the customer will be returned to the manufacturer bearing failure analysis of its cage rivet fracture causes.
(1) deep groove ball bearings, coat ring and ball materials meet GB/T18254-2002 national standards set forth in GCr15 steel composition, heat treatment quality in line with JB1255 requirements.
(2) deep groove ball bearings work appear unusual axial vibration impact is caused by bearing failure and rivet fracture the root causes.

Tapered roller bearings and needle roller bearing structure and its fundamental difference

  taper roller bearing can be separated from the inner ring with roller and cage components together and the outer ring can be installed separately. Roller and raceway contact at the contact line can reduce the stress concentration. Tapered roller bearings can withstand high radial and axial load. The tapered roller bearings can only pass one-way axial load, so as to pass the opposite direction of the axial load on the need install another with symmetrical tapered roller bearings. The needle bearing (needle bearing) is a cylindrical roller with roller bearings, relative to its diameter, roller both thin and long. This is called needle roller. Despite having a smaller cross-section, has a higher load bearing capacity, therefore, especially suitable for the radial space-constrained applications.
Different structures, different types, different direction of the force to withstand, at different speeds, different loads, different materials, the application of different occasions etc.
Fundamental difference: tapered roller bearings rolling body is tapered roller; needle roller bearings needle roller is rolling;
These fundamental difference determines the structure of tapered roller bearings Needle roller bearings relative to a large, tapered roller in addition to radial force than can withstand axial force, and needle roller bearings can withstand radial forces;
Single row tapered roller wheel bearing are double row and multi-row, were applied to different environments and situations;
Tapered roller bearings Needle roller bearings with respect to higher operating speed;
Tapered roller bearings are generally of high quality bearing steel and special steel; rather thin needle roller bearing is used in steel stamping;
In short, these two types of bearings are not the same type of bearing, there are too many different, have some really far-fetched comparison
Needle roller bearings are long thin needle roller and cage. Cylindrical roller bearings. Is composed of cylindrical and rollers. Column than the needle thick, also known as coarse needle.

Resolution angular contact ball bearings and step visual inspection

 Angular contact ball bearings (Angular Contact Ball Bearings) both radial and axial loads. In high speed work. Larger the contact angle, the higher the axial load capacity. In the use of angular contact ball bearings, we first check the appearance of imported bearings, to determine whether it conforms to the standard we require. Here to share with everyone one that we should check that those parts. Angular contact ball bearings should be checked for astigmatism lamp, the appearance of the clutch bearing slewing , cracks and other parts of careful observation.
1, various mechanical injuries, such as rubs, scratches, bruised, bumps, etc., can cause adverse bearing installation, causing partial load and stress concentration, resulting in a decline in rotation accuracy and service life.
2, rust, black and pits, the latter two are easy to store moisture and dirt defects, the most likely to develop into rust. The corrosion is the cause poor installation, the sources of early wear and fatigue, severe corrosion cause bearing scrap.
3, various cracks, such as raw materials, crack, crack forging, heat treatment and grinding cracks, cracks, these cracks in the future during the operation of the bearing, will be a source of stress concentration and rapid expansion, resulting in rupture of the bearing of the bearing life and safety at work of great impact. In fact, for the important purpose bearings, bearing factory has 100% of its constituent parts or ray magnetic particle inspection.
4, peeling and folding, these two defective part and base metal binding is not strong, and its surroundings often exist to varying degrees, or depleted carbon decarburization phenomenon, materials easy caving, debossing or wear of the bearing life and accuracy are negative.
5, riveted or welded cage quality rivet head is mainly observed deviation, skew, relaxation, lack of meat or 'eyelid', the correct position of the welding, solder joint is too large or too small, whether strong or welding welding caused by excessive stuck rolling phenomenon more than a few of our checking angular contact ball bearings in part focus on examination, in addition to some other than the above checks, in addition to poor quality such as typing, such as illegible, damaged, should be considered sub- goods can not be serious acceptance.

Teach you several techniques to identify fire eyes Jinjin bearing quality

Bearings ("Bearing", Japan is called "Axis subject") is in the process of mechanical transmission fixed and reduce the load coefficient of friction components. Can also say that when the other parts in the shaft relative motion, used to reduce friction during power transmission coefficient and holding shaft center position fixed parts. Bearings are one kind of modern machinery and equipment vital components. Its main function is to support the mechanical rotating body, the drive device for reducing the mechanical load during the friction coefficient. According to the different nature of friction of moving parts, rolling bearings and plain Bearing manufacturer can be divided into two categories. But how to determine the quality of the bearing it? Here are some bearing quality inspection method steps skill.
1. The packaging is clear: Under normal circumstances, are factory brand has its own dedicated designer of external packaging design, production conditions and arrangements for making the production of the factory clearance, so in terms of packaging lines to color are very clear, milli unambiguous. Seal word is clear: the bearing body will be printed with the brand words, labels and so on. Font is very small, but most are factory produced using Seal technology, but without the heat-treatment is carried out before the word pressure, so the font was small, but a deep concave, very clear. The font counterfeit products not only blurred, because the rough printing technology, fonts floating on the surface, and some can even be easily wiped off by hand.
2 Is there a hybrid ring: left hand holding the sleeve bearing the body, right hand to rotate toggle coat, listen to whether there is a hybrid ring. As most of the counterfeit products behind the production conditions, completely hand-mill operation in the production process will inevitably distracted by a class of impurities in the sand, hidden in bearing the body, so the rotation will be issued when hybrid ring. This is strictly enforced and production standards, and with the machine operation is the biggest difference between brands.
Is there muddy surface traces of oil: This is the purchase of imported bearings should pay special attention. Because of the current anti-rust technology also 3 is not particularly home, so the bearing body rust treatment can easily leave traces of oil thick, sticky thick stick in your hand, and foreign imported bearings almost see traces of rust oil, experts say that it touches especially careful Bearing smells kind of taste, is certainly under anti-rust oil, but do not see it. Chamfer is uniform: the so-called bearing chamfer, which is horizontal plane and the vertical plane of the junction, counterfeit bearings as restrictions on production technology, in which the corners of the site handled unsatisfactory.

Rolling corrosion causes and prevention of corrosion by a variety of bearing

 intrinsic and extrinsic factors that caused summarized in:
1, the metal surface finish (oxygen concentration differential cell corrosion).
2, the metal chemical composition and structure of the material itself.
3, the solution in contact with the metal surface composition and pH value;
4, the ambient temperature and humidity.
5, with the metal surface in contact with environmental media.
6, another person's sweat is triggered angular contact ball bearing corrosion reasons, it had a pH of 5-6. Therefore, in order to prevent corrosion caused by hand sweat, installation and production personnel should wear gloves, it should not touch the bearing. Oiled to prevent rust bearings
1, soak method: some small rolling by immersion in anti-rust oil, the oil film thickness can be controlled by anti-rust oil temperature or viscosity to achieve. Adhesion to the surface layer of rust grease approach.
2, brushing method: Brush the attention smear even bearing manufacturer surface, do not produce accumulation and pay attention coated to prevent leakage.
3, the spray method: Some material not suitable for large-scale anti-rust oil coating by immersion method, generally about 0.7Mpa pressure filter with compressed air spray cleaner place. Spray application of anti-rust oil or solvent dilution thin rust oil. This method must be improved fire protection and labor protection measures.

Rolling corrosion causes and prevention of corrosion by a variety of bearing

intrinsic and extrinsic factors that cause
taper roller bearing(rollingbearing) is the axes of operation of the sliding friction between the seat into rolling friction, thus reducing friction losses as a precision mechanical components. Generally bearing inner ring, outer ring, rolling elements and cage composed of four parts, the role of the inner ring is fitted together with the shaft axis of rotation; role and the bearing outer ring match, play a supportive role; rolling body is through in the rolling retainer body evenly distributed between the inner ring and the outer ring, the shape and size and number of direct impact on performance and life of rolling bearings; rolling body cage uniform distribution can prevent rolling off, to guide the rolling elements rotate for lubrication.

Angular contact ball bearing seal technology for noise prevention play an important role in

  Angular contact ballwheel bearing (Angular Contact Ball Bearings) both radial and axial loads. In high speed work. Larger the contact angle, the higher the axial load capacity. High-precision and high-speed bearings usually take the contact angle of 15 degrees. In the axial force, the contact angle will increase. Single row angular contact ball bearings can withstand axial load in one direction, the radial load, will cause additional axial force. And the only limit shaft or housing in a direction of axial displacement. Angular contact ball bearing contact angle of 40 degrees, so you can bear large axial load. Angular contact ball bearing non-separation type design, inner and outer rings on both sides of the shoulder uneven. In order to improve the bearing load capacity, which would lower side of the shoulder machined, so that the ball bearings can be put more.
Bearing noise is the importance of environmental pollution, but also the bearing industry an important indicator of the need to control, especially for home appliances, office machinery, instrumentation fillet
Ball bearing noise limit is more prominent. Over the past years, China's bearing industry in reducing bearing noise has done a lot of work, so that the bearing noise level has greatly improved, but compared with other countries, there is still a certain gap between users reflect prominent is "different tone" issues , which appears in an irregular bearing operation sudden sound, and even scream. Bearing noise factors are many and complex, requiring the overall design of the bearing, the bearing of each part - the inner ring, outer ring, cage, rolling and lubricants (grease) to analyze the research, but also from the angular contact ball bearings used in each part of the material, add -1-212 Arts process equipment used as well as engineering, process materials and other aspects to analysis. This is bearing noise technology involves the basic content.

Axial deep groove ball bearings on a fixed

The other end of the inner ring of the clutch bearing must be added fixtures. If the bearing is used in the fixed end, the other end of the outer ring should have a fixed means, if it is used in the floating side, the outer ring fixed to the other end can not.

Angular contact ball bearing seal technology for noise prevention play an important role in

  Angular contact ball bearing manufacturer (Angular Contact Ball Bearings) both radial and axial loads. Can

At higher speeds. Larger the contact angle, the higher the axial load capacity. High-precision and high-speed bearings usually take 15-degree

Antennae. In the axial force, the contact angle will increase. Single row angular contact ball bearings can withstand axial load in one direction,

In the radial load, will cause additional axial force. And the only limit shaft or housing in a direction of axial displacement.

Angular contact ball bearing contact angle of 40 degrees, so you can bear large axial load. Angular contact ball bearing non-separated type

Design, inner and outer rings on both sides of the shoulder uneven. In order to improve the load bearing capacity will process one side of the shoulder

Too low, so that bearings can put more of the ball.
Bearing noise is the importance of environmental pollution, but also the bearing industry an important indicator of the need to control, especially for home appliances, office

Male machinery, instrumentation fillet
Ball bearing noise limit is more prominent. Over the past years, China's bearing industry in reducing bearing noise has done a lot of work

For, the bearing noise level has greatly improved, but compared with other countries, there is still a gap, users reflect prominent is "different

Tone "issues, namely bearings running an irregular bursts appear sound, and even scream. Bearing noise impact of many factors,

Are very complex and require the overall design of the bearing, the bearing parts each - the inner ring, outer ring, cage, rolling bodies, and

Lubricant (grease) to analyze the research, but also from the angular contact ball bearings for each part of the material used, as well as the process of adding -1-212 Arts

Equipment used in construction, craft materials and other aspects to analysis. This is the technology involved in the bearing noise basic content

How to test the use of performance thrust ball bearings?

Install clutch bearing, shaft ring and shaft should examine the vertical centerline. Method is fixed to the tank shell dial gauge face,

Touch the head of the table at the top of the bearing shaft rotating bearing ring raceway, while observing dial gauge pointer, if the pointer deflection, shaft ring and instructions

Axis is not perpendicular to the centerline. Tank shell hole deeper, we can still use an extension of the dial gauge head test.
Thrust bearing is installed correctly, the seat can automatically adapt to the rolling elements rolling, make sure to scroll down raceway body is located.

If installed backwards, not only bearing is not working properly, and each mating surface would be subjected to severe wear. As shaft ring and seat ring and the difference is not

Obviously, the assembly should be careful not to mistake. In addition, the thrust bearing and the bearing seat should be left between the holes

0.2-0.5mm gap to compensate for parts processing, the error caused by mounting inaccuracy when partial operation center bearing rings

Shift, this gap would ensure its automatic adjustment, avoid touching the friction to operate normally. Otherwise, it will cause severe damage bearing

Injuries.

Transmission bearing types and technical requirements

1 Bearing Type
(1) spindle Taper bearing: generally spherical roller bearings, also using a large cone angle double row tapered roller bearings.
(2) generator bearings: deep groove ball bearings, cylindrical roller bearings.
(3) gearbox bearings: deep groove ball bearings, cylindrical roller bearings, full complement cylindrical roller bearings, double row tapered roller bearings, spherical roller bearings, spherical roller thrust bearings, four point contact ball bearings.
2 Technical requirements
From a structural point of view the bearing drive mostly standard bearing types, the difference is that, in order to ensure high reliability, the material, the heat treatment made ​​a number of specific requirements.
(1) rings and rolling elements commonly used ESR smelting ZGCr15 or ZGCr15SiMn bearing steel manufacturing, the quality of heat treatment should be consistent with ZJB J11 038-1993 "military high carbon chromium bearing steel bearing parts heat treatment quality requirements" requirement.
(2) of the Tapered bearing parts for high-temperature tempering treatment to remove excess residual austenite, stable parts dimensional accuracy; ensure that the temperature difference between the larger environment bearing high reliability operation.

Technical requirements

(A) the provisions of the ferrule used in line with GB/T3077-1999 42CrMo alloy steel quenched and tempered or normalized, we can use a comparable or better performance of other materials. Ball used in line with GB/T18254-2002 requirements or GCr15SiMn GCr15 bearing steel, we can use the performance equal to or better other materials.
(2) Heat treatment: ferrule hardness after quenching, quenching the gear tooth surface hardness of the raceway surface quenching hardness, effective case depth shall comply JB/T10705-2007 "Rolling wind turbine Roller bearing" standards. Ball heat treatment quality should meet JB/T1255-2001 requirements.
(3) low-temperature impact energy ferrule -20 ℃ AKV not less than 27J.
(4) clearance for the small clearance and negative clearance to reduce shock and vibration, improve the carrying capacity, and in the case of reduced bearing vibration fretting wear. Yaw bearing axial clearance is defined as 0 ~ 50 μm, Precision bearing axial clearance should not be greater than 0.
(5) consistent with HG/T2811-1996 standard nitrile rubber, is comparable or better performance can be made ​​of other materials of the seal ring.
(6) shall be GB/T7736-2001 standard ferrule Class II requirements for testing.
(7) In addition to the raceways and gear parts, other surfaces should GB/T9793 and JB/T8427-1996 requirements for thermal spraying anti-corrosion treatment, may also have to meet their performance requirements in other preservative methods.
(8) starting frictional torque requested by the user.
(9) bearing parts should have white spots, inclusions, parts surface should not have cracks, corrosion, burns, bump and soft spots and other defects.

Wind bearing types and technical requirements

(A) yaw pitch backing bearings types and technical requirements
1 Bearing Type
Single-row four-point contact ball slewing bearings, double-row four-point contact ball bearing turntable. Such bearings with flexible operation while able to withstand greater axial force and overturning moment, etc

Fourth, the wind turbine wind turbine bearing assembly of the domestic market bearing annual demand:

To dress up with a traditional band bearing gearbox unit as an example calculation asynchronous alternator wind generator clutch bearing assembly Packing:
(A) yaw bearing (four-point contact ball slewing bearing) 1 set
(2) pitch bearing (four-point contact ball slewing bearings) 3 sets
(3) generator bearings (deep groove ball bearings, cylindrical roller bearings) 3 sets
(4) spindle bearing (self-aligning roller bearings) 2 sets
(5) gearbox bearings (deep groove ball bearings, cylindrical roller bearings, full complement cylindrical roller bearings, double row tapered roller bearings, spherical roller bearings, spherical roller thrust bearings, four point contact ball bearing) accelerator has three structural forms, were installed bearings: the first 15 sets, 18 sets of the second, and the third 23 sets.
The wind turbine bearings were first 9 +15 = 24 sets, the second 9 +18 = 27 sets, the third 9 +23 = 32 sets. Estimated time averaged 26 sets.
According to an annual increase of 10 million kilowatts installed capacity, ie 10,000 MW basis, the annual need to add 1.5 MW wind turbines about 6,700 units, to be bearing more than 170,000 units, including large four-point contact ball slewing bearing approximately 27,000 units .

Chinese domestic wind power equipment development

(A) China's wind power equipment localization level continues to increase. The past 10 years, China's largest wind turbine manufacturing industry from scratch, has begun to take shape. February 2005 taper roller bearing the "Republic of China Renewable Energy Law" stipulates in favor of wind power development of the basic principles. After the introduction of a number of specific industrial support policies, such as the July 2005 National Development and Reform Commission issued a "wind power construction management with the relevant requirements of the notice" clearly stipulates wind power equipment localization rate to reach 70% or more, did not meet the equipment localization rate requirements do not allow construction of the wind farm. In this policy under the guidance of some large enterprises have to enter the field of wind power equipment in 2006, engaged in wind turbine equipment manufacturing enterprises has reached 30, 2007 has been increased to more than 40. Wind power equipment localization rate continues to improve, in 2004 to 25% in 2005 to nearly 30 percent in 2006 to 40% in 2007 has reached 44.83 percent, the "Eleventh Five" is expected to reach more than 70%.

China Bearing Industry Association Ho plus group

  Last year I wrote an article on wind turbine bearings supporting the market are analyzed to arouse discussion outside the industry concerned, and may produce wind power bearing on the irrational investment boom issued a warning. In accordance with the June and July of this year, I participated in the seventh held in Canada and the World Wind Energy Conference Coordination Office of Science and Technology, Massachusetts wind US Seminar held feelings, and since 2007, the wind energy industry development of the new situation, again on our wind turbine bearings supporting the technology and market conditions talk about some personal views.
First, the world's wind power industry development
The relative slewing ring of traditional energy sources, environmental pressures and intense geopolitical insecurity, making national development, including wind power, renewable energy to spare no effort. Wind power industry has covered continents of the world and is growing rapidly. Over the past decade the global wind power gain over conventional development depends on wind conditions and the development of a three driving factors: the presence of abundant wind resources in the world, increasing emphasis on global environmental issues, high oil prices and wind turbine manufacturing technology matures.

Another typical design

There is no full cage roller bearing design. Of course, from a lower speed spindle bearing point of view, full roller bearings caused by the decline in the ability of rotation of the bearing application not become an obstacle. However, the friction between the rolling elements can not be ignored is the key.

The reason for the bearing manufacturer cage design, an important function is to separate two adjacent rolling elements in the bearing rolling elements run time to avoid bearing the internal friction, reduce friction and noise. Therefore, although the full roller bearings with high load carrying capacity, but in the spindle bearings, due to rolling friction inside its still not the ideal choice.

Further, the above-mentioned another cage design, i.e. similar to the traditional one-piece bearing retainer. SKF Nautilus bearing the integral type cage is not selected, mainly because of its size is too large, its own weight will cause deformation of the cage, the rolling element and bring more friction between the cage. Furthermore, a device for generating the energy, wind turbine design is an important issue is to increase the energy density, to maximize the reduction of energy loss of its components. From this point of view, one-piece cage also has limitations. .

Tapered roller bearing design

In the early market, in order to meet the design requirements for single bearing, usually bearing the three cylindrical roller bearings. The design is similar slewing bearing, a rolling body (similar to the cylindrical roller bearings) to bear all of the radial force, the other two rolling elements (similar to roller thrust bearings) bear a bidirectional axial force. The bearing of the bearing arrangement appears to meet some of the features alone, but by running the analysis bearing thrust bearing manufacturer function as two rows of rolling bodies to make the whole circle of the bearing is rotated, the both end surfaces of the rolling elements can not achieve the same speed, which it means that the bearings during the large number of sliding friction. And as rolling bearings, sliding friction is to try to avoid, because it will not only bring more bearing heating, while the lubrication of sliding friction in the bearing lubrication is also a very difficult question. Because of the design on some of the issues, the Bearing manufacturer is now unable to meet the growing power of the wind turbines to the demand.

Comparison of different designs cage

In addition to SKF Nautilus bearing cage design, the market there are several different cage designs. Respectively, are to compare the advantages and disadvantages of several cage.

Figure 4 is one of the wear metal pin-type cage. As the name implies, the rolling elements of the bearing design of the through hole in the middle of a rolling pin are connected to the ends of the retainer ring side. By design, the size of this bearing rolling elements bearings other than the same size is much larger, because not only sufficient to meet the load carrying capacity, but also in the rolling open a hole inside the body in order to wear a pin-type cage installation. In addition, the lubrication of the sliding member is an important issue, which has been mentioned in the above. The body bore bearing rolling pin and cage wear are all between the sliding friction, lubrication problems not only not been resolved, it brings the bearing heating and must be of concern.

Nautilus bearing the prominent characteristics

The bearing manufacturer or the back to back configuration of tapered roller bearings, with the larger the contact angle (45). Which not only single bearing spindle configurations possible, while significantly reducing the traditional design of the drive chain length so compact wind turbine designs. Of course, the special design also ensures the bearing or drive all the features
1 larger contact angle
The traditional pairing (or double row) tapered roller bearings, the contact angle is generally only 20 or so, to ensure its larger radial load capability, bearing axial load carrying capacity and the ability to withstand the overturning moment has certain limitations. Therefore, to ensure that a spindle designed to meet the application requirements, there must be another as a second pivot bearing to bear additional radial force, and the two bearing configurations, to meet the axis when subjected to the overturning moment , no deformation.
The Nautilus bearing contact angle break through the traditional design, the contact angle of each single bearing enlarged to 45. With conventional dual bearing configuration comparison, Nautilus bearing two single bearing contact points of connection is much higher than the normal distance between the tapered roller bearing, which connect two points of contact can be used as the point of intersection of two entire shaft a focus, a support shaft running spots.
2 segmented plastic cage
In addition to the larger contact angle, but the bearing Another notable feature is the use of segmented plastic cage. Internal parts of the bearing, the rolling bearing is an important component, in addition to maintaining the roll cage operating state, there are separate to avoid their mutual rolling friction function. Cage is not a force element, can not afford any form of force. Accordingly, it is often used to produce lighter material, while maintaining the frame material to meet another requirement that sufficient strength. Since the operation of the bearing cage rotation power needed is provided by the rolling body, therefore, the holder of the material requires a certain strength to ensure its normal operation.
For SKF Nautilus bearing, in order to ensure that the contact angle connection enough to withstand the force system, bearing sizes are often very large, more applications currently on the market with a diameter of 2 ~ 2.5 m of bearing products. Therefore, reducing the weight bearing itself as its design need to overcome technical problems. As part of the inner and outer bearing rings and rolling elements, in order to ensure that the bearing capacity, in the selection can not have the slightest careless. SKF Nautilus bearings of plastic, not only to ensure adequate strength and weight, to ensure the rotation of the bearing performance, while reducing friction within the bearing.
Segmented design SKF Nautilus bearing another feature (Figure 3). Four or five in the bearing rolling elements sharing a cage assemblies, and each cage without any other links between the components. If the bearing used in the conventional one-piece cage, the size is too large, the weight of the holder causes it to deform in the bearing during operation, this deformation causes the rolling element and the additional contact with the cage, generate additional friction. This will not only increase the bearing operating temperature, but also on the cage and rolling friction material wear and tear can lead to even rolling element cage deformation, and ultimately affect the carrying capacity of the bearing or even life.
Segmented cage, each individual component is very small, even if many components together, will not produce distortion. Also, because each component is only four to five rolling, therefore, the friction generated by the holder will be reduced to a minimum.
3 Application Features
Nautilus bearing is now widely used in high-power wind turbine, instead of the dual bearing design, reducing the size of the drive chain. So what this application can bring benefits in the end, in the application will produce what the problem?
Spindle conventional wind turbine designs, the division of the bearing force is generally fixed side bearings to withstand the axial load and part of all radial load, and the other end of the receiving section as a floating bearing radial load. Wind farm Wind determines the required size of the load bearing size, the bearing size is determined the distance between the two bearings, and also determines the length of the transmission chain.
Single bearing (Nautilus) is designed to ensure the same conditions, the bearing force by a bearing to withstand all of the axial and radial loads, reducing the size of the entire transmission chain. Single bearing design should be considered in addition to the internal preload, but in terms of the application of the bearing with double bearing without any distinction. And single bearing special cage design, so that in grease and oil lubrication conditions have a very good performance.
Only a bearing on the spindle, have realized the role of two Bearing test machine  then the stiffness of the bearing in the bearing design has become a key factor that must be considered. Nautilus bearing inner ring for the two separate parts, the application by checking wind turbines, in the production of bearing internal clearance will be designed into the ideal range, the bearing after installation, you can achieve optimal pre-
Clamping force, simplifying installation of bearings

wind turbines host bearing configuration

Conventional wind turbine bearings configured for dual bearings. According to the working principle of wind turbines, transmission chains usually designed as follows: spindle, gear box (growth container) and generators. On the spindle, take double bearing configuration is the more traditional and more common form, using the bearing type according to the design requirements vary, but typically configured for more traditional bearings spherical taper roller bearing or tapered roller bearings configuration configuration.
Double bearing arrangement has the advantage of spindle bearings to withstand wind loads of the most complex, in addition to torque, but basically no other loads are passed to the drive chain gear box, gear box design to bring a great convenience. However, this configuration also has its own disadvantages, such as long chain drive, in addition to the length of the spindle, but also consider the gearbox shaft connected to the coupling length. Thus, in a low-power wind turbines, this configuration is relatively common. In the wind power generator, the long drive chain means that a larger volume, and higher manufacturing costs.
Spindle bearing arrangement is the latest solution for a single bearing support. With the development of wind turbines, high-power wind turbine earing to become the development trend of the market, higher energy density also become the host of manufacturers competing to catch up with the target, to bearing design has brought great challenges.
Wind turbines in the power, to ensure that there is sufficient load capacity to withstand greater wind loads. Thus, the spindle, including the bearing size is bound to increase, which will result in an increase in the overall weight of the host, the attendant is the host-related components, including the tower and other parts of the manufacturing cost increases. So if there is able to improve wind turbine power while reducing weight and reduce the manufacturing cost of the entire wind turbine it? This became the host vendors and component manufacturers are facing an increasingly urgent problem, because the decrease in cost means to improve product competitiveness. For the above purpose, SKF developed specifically for high-power wind turbines large contact angle of tapered roller bearings.

Bearing Solutions for wind turbines

  With the development of new energy applications, as a new energy in the early development of wind energy in the grid occupy an increasingly large proportion. Meanwhile, more and more manufacturers have developed a variety of wind turbine hosts, in order to enhance its product competitiveness on the market, from the drive chain design improvements to various parts of the different functional considerations, have become wind turbine design improvements hosts different considerations.

As main components of a wind turbine, the bearing has been the choice of the host are most concerned about the manufacturer, either the design of the bearing itself, or the selection of the bearing arrangement, both the host determines the wind turbine operating performance and service life.

As the wind bearing manufacturer conditions complicated, expensive mainframe maintenance, to ensure the reliability of its operation, that is the life of wind turbines, has been troubled by the host manufacturer of important issues. Wherein the application of the bearing efficiency of the host is extremely important. Therefore, based on the complexity of the wind turbine, SKF and developed specifically for a special bearing, namely "Nautilus" bearing - a kind of special large contact angle of the double row tapered roller bearings

Five high-frequency electromagnetic testing machine

  High frequency testing machine
Frequency fatigue testing machine is used for determination of metal, alloy material and components (such as operating joint, fixed contact member, spiral moving parts, etc.) at a room temperature tensile, compression or tension and compression fatigue characteristics of alternating load, fatigue life, pre-crack and crack propagation tests.
Frequency fatigue testing machine equipped with the appropriate test fixture, can be a sinusoidal three-point bending test under load, four-point bending test, tensile test sheet material, sheet thickness tensile test, hardened steel strip tensile test, the chain tension test, solid fittings test, link test, torsion fatigue test, Bearing test machinefatigue test compound, interactive bending fatigue test, CT test, CCT test, fatigue test gear.
The main technical parameters of equipment and functions
General: test equipment, can achieve the following relevant test standards:
JJG 556-1988 Axial load fatigue testing machine test methods
HB
5287-1996 Metal Materials axial load fatigue testing
GB / T 6395-2000 Metal fatigue crack growth rate test method
GB / T
4161-1984 plane strain fracture toughness of metallic materials KIC test methods
GB / T 2038-1991 Metallic materials ductile fracture toughness test methods JIC

Germany Sincotec frequency fatigue testing machine Machine Descriptions and working environment

High-frequency fatigue testing machine is widely used to test a variety of metal materials and metal products, resist fatigue fracture properties, S - N, - and the curve, testing and pre-fracture toughness specimens (eg, JIC, etc.) fatigue cracks; matching the different clamps or environmental testing apparatus, is widely used to test a variety of materials and components (such as plates, gears, crankshaft, bolts, chains, linkages, compact tension etc.) of the fatigue life, to be completed symmetrical fatigue test,angular contact ball bearing  fatigue test, one-way pulsating fatigue test, fatigue test block spectrum, modulation control fatigue test, high temperature fatigue test, three-point bending, four-point bending, torsion fatigue test a wide variety of.
Frequency fatigue testing machine various types of fatigue testing machine, the structure is simple, no maintenance of the hydraulic source and a valve, pump or cooling system, easy to operate, high efficiency and low energy consumption, it is widely used in scientific research, aerospace, universities and industrial production and other departments.
Germany Sincotec frequency fatigue testing machine performs the following standards:
       GB / T 3075 Metal axial fatigue testing
       ASTM E 467 Axial Fatigue Test System moderate amplitude dynamic force calibration method
       ASTM E 739 fatigue data stress - life and strain - life linear or linear statistical analysis
       ASTM E 1942 for cyclic fatigue and fracture mechanics testing guidelines calculation data acquisition system
       GB / T 13816 welded joints pulsating tensile fatigue test methods
      GB / T 15111 spot weld shear tensile fatigue test methods
 GB / T 6395-2000 Metal fatigue crack growth rate test method
ASTM E606 standard, ASTM E647 standard, ASTM E399 standard,
ISO 12737-2005 Metallic materials plane strain fracture toughness test methods,
ISO 12135-2002 Metallic materials - quasi-static fracture toughness test methods
ISO 4965 Axial load fatigue testing machine dynamic force calibration strain gauge technology,
BS 7448-1:1991 Metallic materials fracture toughness test structure Kic critical CTOD and J values ​​worthy of testing methods,
Fracture toughness tests BS 7448-2:1997 Metallic materials Machinery Kic critical CTOD values ​​and J is worth testing methods,
Fracture toughness tests BS 7448-4:1997 Metallic materials Machinery stable crack extension of fracture resistance curve and the initial worth method.

Bearing test machine and test technology

From the test, load, drive and control technology, and introduces the bearing testing machine testing techniques, and an example of the life test machine, slewing ring, aviation, aerospace bearing test machine and test methods. Finally, China's bearing testing machine test technology development prospect.
With the growing recognition of the importance of bearing test, the manufacturer of the bearing test requirements are also increasing. In the product development stage to do structural testing, inspection and bearing can meet the requirements of their working conditions, mainly on the bearing structure of the assessment. Product type, the test mainly for bearing quality assessment, identification of its quality grade, find bearings in the structure, materials, manufacturing processes and other aspects of the weak links,

Japan NSK Bearings

NSK first in Japan since 1916 began production of bearings since, as a Precision bearing the Japanese bearings, develop and provide various types of bearings for the industrial development and mechanical progress has made a great contribution. Now, NSK bearing areas, ranking first in Japan, but also in the forefront in the world. In addition, NSK bearings also temper the use of production precision machining technology, from long ago began by providing auto parts, precision machinery products, electronic products and other fields to enter the application, and promote multi-faceted career development. From the 1960s began to actively explore overseas markets, so far, NSK Group has achieved in 26 countries with a total of 76 overseas sales out lets in 12

Precision bearings with

In order to ensure the bearing after installation without excessive deformation, must be done:
(1) shaft and housing bore roundness and the vertical shoulder block bearing according to the appropriate precision requirements.
(2) is necessary to accurately calculate the rotation of the ferrule with the amount of interference, but also suitable for accurate calculation of the amount of the fixed ring.
Rotating rings blanch the amount of interference to the extent possible should also get smaller. As long as the operating temperature and ensure the effect of thermal expansion, and the maximum speed of the centrifugal force, resulting in a tight fit so as not to creep or slewing ring  Fixed ring size according to the work load and bearing size, select small clearance fit or interference fit, too loose or too tight is not conducive to maintaining the original shape exactly.
(3) under the conditions of bearings, such as in high-speed operation, and higher operating temperature, special attention should be rotating rings can not be too loose to prevent eccentric, as well as non-fixed ferrule with a gap to prevent ferrule deformation under load and vibration excitation.
(4) to take a small fixed ring interference fit condition that matches the shape of the surface of both sides are very high precision and a smaller roughness, or cause installation difficulties removal more difficult, in addition, also need to consider the impact of the spindle thermal elongation .
(5) using the pair of angular contact ball bearing spindle, mostly lighter loads, the amount of interference, such as too large, then the internal axial preload amount will be significantly larger, resulting in adverse effects. Use double row cylindrical roller bearings and tapered roller bearing spindle spindle, its load is relatively large, so it is also relatively large interference with