Industry News
The rapid development of China's wind power bearing ---2009-10-30
The relative scarcity of traditional energy sources, environmental pressures and geopolitical strong sense of insecurity, making countries in the development, including wind power, including renewable energy to spare no effort. In recent years, global wind power industry was rapidly growing trend, an annual installed capacity grew 20% to 30%, and in 2008 the world's total wind power installed capacity reached 120.79 million kW. China's wind power industry since 2004, and "blowout-style" development, 2006, 2007 and 2008 for 3 consecutive annual installed capacity has reached 12.15 million kW. 2010 total installed capacity will reach 30 million kW more than 10 years earlier scheduled to meet the national targets to be achieved by 2020.
World and China, the rapid development of wind power industry, to China's bearing industry to bring an unprecedented excellent opportunities for development. Nearly 20 companies involved in wind power bearing bearing industry, which ZWZ, Tianma, Luo axis, Jing Ye Daye-axis mills and wind power companies such as bearing production scale has been formed to begin high-volume to the domestic wind power equipment manufacturing enterprise supply yaw bearings and variable propeller bearings, and to export them. Yaw bearings and variable paddle bearing soon oversupply. Transmission bearings (including the main shaft bearings, bearings and generator bearings accelerator, etc.) has entered the small-batch trial and trial stage, is expected to be made of two or three years.
Wind power bearing industry is the industry opportunities and risks coexist in the tremendous business opportunities to enterprises bearing the same time, there is a considerable investment risk, market risk and technology risk, the industry is now circulating a saying: "Wind power is the bearing it is the opposite, there is no big deal ", which is very harmful. Technically speaking, China's enterprises are in the bearings have not been sufficient research and development, there is no sufficient technical reserves and the rush into battle, the right wind power bearing many of the deep-seated problems and did not fully understand well, that we need to be properly back make up this lesson. This class does not fill, sooner or later into trouble. A shrewd entrepreneur should have a clear understanding of this point, in grasping the market, it is necessary to free a hand-task research and development.
Wind Power bearing the R & D, including a wide range of content. We want to focus on the reliability design, reliability, manufacturing and reliability trials. In particular, bearing accelerator R & D and industrialization, we need to devote greater effort.
Bearings in wind power R & D and industrialization, we should aim at the world wind energy industry's cutting-edge scientific and technological development, followed by the development trend of wind power equipment, simultaneous, or advance the development of wind power bearing. With the stand-alone wind power capacity growing from the land to the offshore wind farm development, wind power generation group of technologies has also been increasing. We can not wait for the launch of a new host, before going to R & D supporting bearings. Efforts should be made with the fan equipment manufacturing companies formed a strategic alliance with the host simultaneous R & D, or even ahead of R & D supporting bearings, for some cutting-edge technology, we must maintain a highly sensitive, rapid follow-up.
In all the fans supporting bearings, in particular to attract our attention is the accelerator bearings.
Fan accelerator is a large transmission ratio gear box. As the affordable range of torque and speed fluctuations in large, easy to drive loads mutations, box weight and installation space is limited, install the platform, there is flexible deformation, and therefore the traditional heavy industrial gearboxes, a far cry from the application environment. Therefore, fans and supporting accelerator reliability of bearings has become the current wind power sector, the difficulty and focus. We should pay close attention and follow up with a number of cutting-edge technology.
If the fan drive system research, a global leader in the British Romax company's proposed growth rate of devices on the fan bearings and lifetime calculation of stress analysis of new ideas and new methods. Accelerator in the design of fan bearings when the bearing is not a single mechanical analysis, but rather bearing and accelerator as a whole, in a dynamic situation, as a system to analyze. To consider the deformation axis and the box, a number of bearing and non-linear interaction between the rigid, bearing internal load distribution between rolling bodies and other. According to load, preload, misalignment, high-speed effects, micro-precision geometry, stress distribution, film thickness, pollution, fatigue and load limits, and many other factors, on the bearing life calculation and correction.
Another example is Japan's NSK company uses its own R & D STF (Super-TF) steel and HTF (Hi-TF) steel bearing fan accelerator. In the course of the accelerator, gear wear small metal particles generated in the bearing surface to form the work will be indentation, indentation edge of the formation of a high stress concentration and become the source of fatigue, resulting in spalling and shorten bearing life. NSK has developed a medium carbon alloy steel carbonitriding process, so that part surface to be more stable residual austenite (about 30% ~ 35%), and a large number of small carbide and carbon and nitrogen compounds. The latter can guarantee the surface hardness and wear resistance, so that indentation is not easy to form; the former can reduce the indentation of the edge effect, preventing the formation and expansion of the source of fatigue, thus significantly increasing the bearing in the fan accelerator such as the pollution lubrication life operating conditions. This regard, the Luoyang Bearing Research Institute has carried out R & D work and achieved initial results.
World and China, the rapid development of wind power industry, to China's bearing industry to bring an unprecedented excellent opportunities for development. Nearly 20 companies involved in wind power bearing bearing industry, which ZWZ, Tianma, Luo axis, Jing Ye Daye-axis mills and wind power companies such as bearing production scale has been formed to begin high-volume to the domestic wind power equipment manufacturing enterprise supply yaw bearings and variable propeller bearings, and to export them. Yaw bearings and variable paddle bearing soon oversupply. Transmission bearings (including the main shaft bearings, bearings and generator bearings accelerator, etc.) has entered the small-batch trial and trial stage, is expected to be made of two or three years.
Wind power bearing industry is the industry opportunities and risks coexist in the tremendous business opportunities to enterprises bearing the same time, there is a considerable investment risk, market risk and technology risk, the industry is now circulating a saying: "Wind power is the bearing it is the opposite, there is no big deal ", which is very harmful. Technically speaking, China's enterprises are in the bearings have not been sufficient research and development, there is no sufficient technical reserves and the rush into battle, the right wind power bearing many of the deep-seated problems and did not fully understand well, that we need to be properly back make up this lesson. This class does not fill, sooner or later into trouble. A shrewd entrepreneur should have a clear understanding of this point, in grasping the market, it is necessary to free a hand-task research and development.
Wind Power bearing the R & D, including a wide range of content. We want to focus on the reliability design, reliability, manufacturing and reliability trials. In particular, bearing accelerator R & D and industrialization, we need to devote greater effort.
Bearings in wind power R & D and industrialization, we should aim at the world wind energy industry's cutting-edge scientific and technological development, followed by the development trend of wind power equipment, simultaneous, or advance the development of wind power bearing. With the stand-alone wind power capacity growing from the land to the offshore wind farm development, wind power generation group of technologies has also been increasing. We can not wait for the launch of a new host, before going to R & D supporting bearings. Efforts should be made with the fan equipment manufacturing companies formed a strategic alliance with the host simultaneous R & D, or even ahead of R & D supporting bearings, for some cutting-edge technology, we must maintain a highly sensitive, rapid follow-up.
In all the fans supporting bearings, in particular to attract our attention is the accelerator bearings.
Fan accelerator is a large transmission ratio gear box. As the affordable range of torque and speed fluctuations in large, easy to drive loads mutations, box weight and installation space is limited, install the platform, there is flexible deformation, and therefore the traditional heavy industrial gearboxes, a far cry from the application environment. Therefore, fans and supporting accelerator reliability of bearings has become the current wind power sector, the difficulty and focus. We should pay close attention and follow up with a number of cutting-edge technology.
If the fan drive system research, a global leader in the British Romax company's proposed growth rate of devices on the fan bearings and lifetime calculation of stress analysis of new ideas and new methods. Accelerator in the design of fan bearings when the bearing is not a single mechanical analysis, but rather bearing and accelerator as a whole, in a dynamic situation, as a system to analyze. To consider the deformation axis and the box, a number of bearing and non-linear interaction between the rigid, bearing internal load distribution between rolling bodies and other. According to load, preload, misalignment, high-speed effects, micro-precision geometry, stress distribution, film thickness, pollution, fatigue and load limits, and many other factors, on the bearing life calculation and correction.
Another example is Japan's NSK company uses its own R & D STF (Super-TF) steel and HTF (Hi-TF) steel bearing fan accelerator. In the course of the accelerator, gear wear small metal particles generated in the bearing surface to form the work will be indentation, indentation edge of the formation of a high stress concentration and become the source of fatigue, resulting in spalling and shorten bearing life. NSK has developed a medium carbon alloy steel carbonitriding process, so that part surface to be more stable residual austenite (about 30% ~ 35%), and a large number of small carbide and carbon and nitrogen compounds. The latter can guarantee the surface hardness and wear resistance, so that indentation is not easy to form; the former can reduce the indentation of the edge effect, preventing the formation and expansion of the source of fatigue, thus significantly increasing the bearing in the fan accelerator such as the pollution lubrication life operating conditions. This regard, the Luoyang Bearing Research Institute has carried out R & D work and achieved initial results.
