Oversized bearings such as wind power and shield machin […]
Oversized bearings such as wind power and shield machines
Due to the relatively low technical threshold of 1.5MW yaw, change industry, and spindle bearings in wind turbines, a number of domestic bearing companies have been able to mass-produce and have basically achieved domestic production. The Wafangdian Bearing Group and Tianma Bearing Group Domain has the largest market share. The large-scale wind turbine turntable and spindle bearings of 3MW and above have a large gap from China's and foreign countries in terms of product design and manufacturing process testing test technology. The change in industry, yaw, and spindle bearings are mainly German SCHAEFFLER
Several companies of Code SKF are able to produce supporting equipment, while domestic bearing enterprises are in the basic starting stage. Since 2009, the total installed capacity of China's electric power has exceeded 25.8 million kW, and the new installed capacity ranks first in the world. At the current development rate, the cumulative installed capacity of 100 million kW will be achieved in 2020. Each 3.0MW high-power wind turbine requires 5 sets of super-large air navigation, pitch and main shaft bearings. According to the annual installed capacity of 10 million kW, that is, 10,000MW, an annual installed capacity of 3MW wind turbines is required. 17,500 sets. Limited by the country's backward overall manufacturing and processing level, the three key components of the shield machine are the main bearings, hydraulic parts and electrical components.
Control components have long relied on imports and cannot be localized. It is understood that as of 2013, the total mileage of subways in the top ten cities in China is 1,270km, and by 2015, the total mileage of subways in China will reach 3000km. More than 40 cities have been approved for construction, and the total planned mileage is 700km by 2020. It can be seen that the next 5 to 10 years will usher in the peak period of China's subway development, which will bring a huge shield machine market. Based on the calculation of a shield machine's service life of 10 ~ 15km, the annual demand for the shield machine market in mainland China is about 100 units. In addition, Chinese companies export about 30 units to India, the United States and other countries every year. At present, there are about 300 shield machines in the Chinese market. With the new round of subway construction boom in the country, by 2015, about 600 shield machines are needed. In addition to subway tunnels, as well as telecommunications, power cable tunnels, municipalities, underground rainwater collection culverts, and oil and gas pipelines, shield machines are also needed. Especially in recent years, heavy rains have caused floods to major cities. The Chinese government has realized The weakness of municipal drainage pipes to Chinese cities is expected to be a hot spot in the market in the next 5 to 8 years for small shield machines of 3.5 to 4.5 m used for municipal drainage pipe construction.
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