Wind power equipment bearing the hardship to be broken.
December 10,cast bronze the reporter learned from Dalian ZWZ, but also supporting a number of major equipment for the country's high-end bearing products successfully produced here, to fill the gap: 5 MW wind turbine pitch bearing sent to the user installed; completed hob shield bearing main bearing and research and development, and began to test installed; large portfolio backing, precision, sealed bearings successfully developed, through the user's acceptance of ... ...
At the same time, bronze bushing a total investment of 500 million yuan Shanghai Electric's wind power bearing large clean and efficient production line technological transformation project completion and operation of the first units of 3.6 MW offshore wind power bearing off the assembly line. Shanghai Electric from the introduction of technology to the joint design,dry bushing and then to independent development, out of the bearing on the development of a new road. At present, China's technological development capability and technical personnel, process control have reached the international level, plain bearing the cost of imported bearings only about 2 / 3, after mass production is expected to drop to import bearings 1 / 2.
While filling the gaps in a day, but domestic companies focused their attention on the global trend, sleeve bushing the progressive realization of high-end products bearing the efforts of industrial upgrading, will change many of our key focus areas of technology and equipment on high-precision, high reliability, high speed bearing long-term dependence import condition.
Bearings are of the soft underbelly of wind power equipment manufacturing.
In recent years,DU bushing the rapid development of China's equipment manufacturing industry, but for major equipment, but most of the bearings supporting the high dependence on imports, bearings and other core components of major equipment has become a bottleneck in the development countries. "The rapid development of domestic high-speed railway, but the bearing has become a serious bottleneck. United States and Europe can meet the current high speed rail bearing the needs of 350-400 km, while most of China's current high-speed bearings can only meet the EMU 150-180 km . bushing "industry, for example. In addition, large wind turbine bearings, turntable bearings deep drilling rig, offshore drilling platforms and other energy equipment series bearings are high-end bearings are also the weakness of domestic enterprises.
It is understood that an important use of precision large bearing for wind generator. Wind turbine bearings including: yaw bearings,brass bushing spindle bearings, transmission bearings, generator bearings.
Kyushu Electric is responsible for a wind power source told reporters that as fans of one of the important equipment, wind power bearing the force and vibration of the complex, under heavy shock load, and yaw, pitch bearing installation costs than Great, but needs to achieve with the same host at least 20 years of life.Mould guide plate Because wind power equipment, poor working conditions and long life and high reliability requirements, making wind power bearing with high technical complexity, is recognized as the most difficult the localization of two parts (bearings and control system) is one.
China wind power bearing in a stage in a long rely on foreign imports, the price is expensive, increasing the cost per kilowatt of wind power equipment, and restricted the decline in the cost of wind power.
Domestic enterprises to explore the progress.
Currently, the domestic wind power bearing gradually formed a large-scale, serial production,plasic bushing the main enterprises ZWZ, Los shaft, Research Technology, radius support, Shanghai United, and other related enterprises.
China Bearing Industry Association, according to staff revealed that wind bearings, yaw bearings and pitch bearing relatively low technical threshold, while the growth rate of the spindle bearings and high-tech devices bearings, generator bearings essentially mature technology generic products. Currently, the domestic wind power bearing capacity of enterprises focused on changes in the yaw bearing and bearing on the pulp, and to 3 megawatts of wind power equipment for the main bearings for the spindle bearings and bearing accelerator, the basic dependent on imports, only the individual Initial involvement of domestic enterprises.
It is understood that the bearing industry in China wind power bearing on the design, manufacturing and testing techniques are far from fully digested, such as the spindle bearing is what kind of bearings as well, which pitch is a structure bearing slewing ring as well, slewing bearing raceway hardened teeth and how to prevent cracks, how to ensure that the surface hardness and hardened layer depth is still at an exploratory research into difficulty.
Difficulties, but did not block the domestic enterprises to explore the bearing forward. Targeting a group of world-class leader in the domestic, to revitalize the equipment manufacturing industry in 16 key areas of high-grade bearings supporting the market-oriented, the implementation of a strong investment, a high level, fast output of the transformation, has now formed a 1.5 MW, 2.1 MW and 3 MW wind power bearing the full range of production capacity.
Luoyang LYC Bearing Co., Ltd. of the relevant person in charge told reporters that they had just made an important breakthrough. With independent intellectual property rights of private wind power gear box bearing testing machine, after assembly testing, load testing, testing the technical performance indicators to meet the design requirements, to fill the gaps in the domestic bearing industry. The test machine can complete the growth rate of 3 megawatts of wind turbine bearings inside the 18 sets of tests, the growth rate for wind power gear box bearings to provide the necessary test equipment and test methods for the design and retrofit bearings provide important experimental data for the process method of bearing products provide an important criterion of verification, so as to enhance the growth of wind power gear box bearing the level of product quality and provide the conditions.
ZWZ relevant responsible person said, they have built world bearing the largest species, the largest production scale, and the supporting units of the whole, the largest wind power generation bearing production bases, in the design and development, manufacturing process, testing the three major technology reached the world level, a handful of the world for 5 MW wind turbine bearings supporting one of the enterprises.
"Twelve Five" period is expected to be a breakthrough.
Recently held in the high-end equipment manufacturing technology and industrial development bearing on the high-level seminar, a number of industry experts believe that China's high-end equipment manufacturing is the bottleneck of the lack of high-end bearings, while the bearing is also a "second during "most likely to achieve the first breakthrough in the industry.
Chinese Academy of Engineering Lu Bingheng that bearing the high-end R & D related to materials, oil and lubrication, manufacturing, design, bearing manufacturing equipment, test and test and a series of technical problems, but also contact mechanics, lubrication theory, tribology, fatigue and failure, heat treatment and materials, organization and cross-disciplinary basic research. We have in the industrial development policy, planning, technology development has made key layout, equipment manufacturing and high-end bearings to solve the backward problem. Many forces, only the common research organizations do a good job combining production and research to complete the task of moving to high-end bearings.
ZWZ As the largest comprehensive bearing manufacturers in recent years to accelerate the technological transformation and innovation as the industry pointed out the forward direction. ZWZ Shun Wang Lu, chairman, said as the National Basic Research Program bearing "973" project in the business, ZWZ, Xi'an Jiaotong University is working with eight other participating units to build compact Cooperative Mode, the production technology and promote enterprise combination of research, hoping to break through the domestic bearing industry as a whole to find a feasible path.