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Recently, the Industry One-way Pulley Assembly Industry Development Forum was held in Shangri-La Hotel, Changzhou, Jiangsu.
Pulleys are also known as pulleys. In this forum, Shi Jianwei, chairman of Jiangsu South Bearing Co., Ltd. (abbreviated as South Bearing Company), said with full confidence: “We will exceed the one-way pulleys with cost-effective automotive generators and always create value for customers, breaking the one-way vehicle The pulley assembly market has been monopolized by a few developed country enterprises."
Some experts in the industry commented: “Sheng Jianwei's remarks indicate that China's auto single-axle pulley assembly industry has emerged with its own light.†
â– technical change <br> <br> car pulley sheave mainly used for long distance power transmission belonging to the hub-type parts, are key components in the automobile generator, the normal operation of the car has a crucial role. Its manufacturing process is generally based on casting, forging, and the material is generally cast iron or steel.
At present, there are three kinds of automobile pulleys on the market: traditional rigid pulleys, OAP (generator overrunning one-way pulleys, also known as generator built-in clutch pulleys) and OAD (generator overrunning decoupler pulleys, also known as generator built-in de-coupling devices). pulley). OAP and OAD are collectively referred to by the industry as automotive over one-way pulleys.
The OAP one-way clutch unit consists of a grooved ramp raceway, a spring retainer and a needle roller. The OAD one-way clutch unit consists of a torsion spring, a nylon support seat, and a limit ring.
The automotive alternator one-way pulley assembly is a kind of one-way bearing assembly, which reduces the tension and relaxation force of the belt at a moment when the speed of the generator rotor exceeds the driving speed, so that the entire engine train works steadily, avoiding The chattering phenomenon of the wheel train extends the life of the bearing of the belt and the main driven member.
Unlike conventional steel pulleys, OAP only rotates in one direction, reducing the vibration of the engine's accessory drive system, and significantly extending the lifetime of the accessories system components. In many motor systems and smaller automotive modern engines, rigid pulleys do not effectively reduce the irregular vibration of the attachment system. Irregular vibration can cause damage to the attachment system and even result in complete engine scrap. OAP minimizes such vibrations and significantly reduces the friction experienced by the components of the belt and other accessory systems, thereby significantly extending its useful life.
OAD is an OAP upgrade. OAP uses a needle roller friction drive (roller clutch), and OAD uses a spring friction drive (spring clutch), both to accommodate engine speed fluctuations and torsional vibrations.
â– The new pulley market was monopolized by foreign companies More than 20 years ago, the pulleys on the auto generators were steel wheels.
Steel pulley manufacturing process is simple, the price is relatively cheap, but there continue to appear belt wear, belt jitter, easy to waste the idler wheel and idler easy to damage and other issues. Some international automotive generator pulley enterprises have tried to solve these problems and have continuously explored the technical innovation path of the pulleys. The one-way pulleys OAP and OAD have emerged.
The first company to develop OAP is Schaeffler Group INA Bearings. INA invented OAP in 1995. Compared with the original steel pulleys, INA's OAP is very effective in reducing noise, reducing vibration, and extending the effective period of other components. In addition, OAP can save 2%. To date, INA has manufactured and sold 120 million OAPs.
Under the temptation of market profits, some international companies attempted to develop OAP, but they were restricted by INA's strict patent protection, and they had to change their technological route. Then OAD emerged.
CAE engineer Sun Han of Shanghai Valeo Automotive Electrical System Co., Ltd. said in an interview with reporters: "Fareo is a big user of OAP and OAD which is beyond the one-way pulley. OAP and OAD have energy-saving, emission reduction, vibration and noise. The advantages of low cost, good comfort and long wheel train life are very demanding on the consistency of mass production, bearing performance, spring performance and metal heat treatment technology, and it is difficult to develop, especially because of its strict patent protection, which has deterred many companies OAPs and OADs that do not have intellectual property rights and patented technologies can only enter the automotive aftermarket and cannot enter the automotive market."
Bu Yonghua supplier quality management engineer Bu Yongbo introduced: "Borghua sodium is also a large user of the car beyond the one-way pulley OAP and OAD. One-way clutch is the core component of OAP. Schaeffler Group INA on OAP technology confidential The protection is extremely strict.Although INA has an OAP production plant in China, INA still puts one-way clutches in production in Germany, and then travels one-way clutches from Germany to China and fits them on OAPs. Its technology leaked."
Since OAP and OAD entered the market, more than 90% of the world's automotive OAP supporting market was occupied by German INA, and over 90% of the automotive OAD supporting market was occupied by Littens (Leiden) of Canada.
â– -wheel independent beyond a strong market <br> <br> South bearing company specializing in the manufacture of automotive needle roller bearings, automobile generator-wheel assembly, participated in the development of industry standards, "low-carbon steel rolling bearing parts carbonitriding heat treatment "Technical conditions", supplying batch products to manufacturers of auto parts such as Valeo, Bosch, Siemens, and Magna, and have exported products to the United States, United Kingdom, France, Germany, Italy, Spain, Canada, South Korea, Japan , Thailand and India and other countries and regions.
Nanfang Bearing Co., Ltd. to fill the gap in the domestic OAP independent responsibility for structural innovation of OAP, to avoid the OAP patent barriers existing foreign advanced enterprises.
Since 2011, Nanfang Bearing has sold 3 million sets of OAPs to the automotive aftermarket, and currently has 2 million sets of OAP annual production capacity. In 2020, its OAP annual production capacity will increase to 8 million sets.
In the South Bearing company OAP products, the combination of one-way needle roller bearings is a key component. Nanfang Bearing has owned independent intellectual property rights for OAP key components and its product technical indicators have reached the advanced level of similar products in developed countries.
Today, Nanfang Bearing Co., Ltd. is able to independently design, develop and produce OAP, owns OAP core technology, and applies for OAP patents in more than 10 countries. It is stepping up its offensive auto OAP market.
While aggressively working with Valeo to promote OAP supporting work, South Bearing Company negotiated with OBU, SAIC and Chery vehicle manufacturers to negotiate OAP support matters and initially obtained intentional orders.
Shi Jianwei introduced several famous places: “OAP, our proprietary product developed and produced by ourselves, has passed the bench test of Great Wall Motor Company; passed the road test of the Pan-Asian General Saiou model and is undergoing low temperature test; we have passed the on-site audit of Chery Automobile Co., Ltd. Road test; has passed the road test of Geely Automobile Company."
While independently developing OAP, South Bearing Corporation has reserved a large number of technologies for the independent development and production of OAD.
The South Bearing Company is carrying out OAD patent development and plans to start OAD design and production process validation in 2017 and carry out a large number of tests in order to reduce the cost of the process by 25%.
Bu Yongbo introduced: "South Bearing Co., Ltd. independently developed OAP, solved the patent problem and succeeded very well."
South Bearing is planning to enter the automotive OAP market in 2017. Sun Han said: "The multinational automotive OAP company has felt the competitive pressure from the South Bearing Company and had to adjust its sales strategy and soon reduced the OAP price."
Bu Yongbo added: "Before the southern bearing company OAP entered the auto parts market, the OAP monopoly price of the transnational OAP company did not discuss.
Shi Jianwei said: "We pursue the concept of precision, leanness, precision, and create value for our customers with cost-effective products and services. We can ensure the stability of automotive OAP production process, product quality consistency, and 100% traceability of parts. The cost is 15% to 30% lower than that of the existing international brand OAP, and it is the first price-performance ratio in the domestic similar products."