The application of bearing in the field of energy engineering

According to the ( Electric power industry 'ten ニ five' planning report) Expected, 'twelfth five-year', 'much starker choices-and graver consequences-in' during our country the construction of large capacity thermal power unit size to 5. 600 million kW, and planning the new generator is generally adopted high parameter, large capacity units. In these high parameter, large capacity units need high-end bearing technology as the base to break but now there is still a large gap of bearing products in China and abroad, high-end bearing in large scale dependent on foreign technology, in terms of nuclear power unit, the long-term development of nuclear power, according to the country in 2020, nuclear power installed capacity in China will increase to 40 million kW, the country will invest 400 billion yuan to build 32 new million kilowatt nuclear power plants. Both for at present, the main stream of the second generation and second generation technology, and is the introduction of digestion technology AP1000 three generation, is break through four generations of high-temperature gas-cooled reactor technology, as a nuclear power plant in the 'heart' of nuclear main build localization of nuclear power technology is the last one of the most difficult major case. The nuclear main pump bearing core technology entirely by the United States, France, Russia and other countries. Three generations of AP1000 main pump and hydrogen compression machine is new equipment is since the 21st century in China, such as a large, new energy into the development of key equipment, didn't have the product in the world, the overall technology in our country and abroad was basically the same level, but the key core components, such as the 'joint' of main pump bearing totally dependent on American Westinghouse's technology, even though the bearing during the trial in the United States had some problems, but eventually settled abroad, in this respect is still blank in our country. Nitrogen compressor bearings with RENK products, the bearing didn't do it abroad, negotiations over bumpy, finally provides the only product without detailed drawings and technical. Branch of main pump bearing technology once mature, national defense construction in our country ( Such as ships drive) And economic construction, Such as electricity) Will play a strategic role. So this kind of new and high technology content of bearing, for our country is a great challenge, also has the huge opportunity, must focus on. For nuclear power, while the domestic nuclear power technology using the latest EPR three generation developed the world's most big, stand-alone capacity of 1750 mw nuclear power generator and half speed and taishan built the first units in China, but its power generation machine rotor bearing the ALSTOM technology, there is no independent intellectual property rights, can only be processed according to the drawing, for our country 1 million generators, steam turbine or generator bearing and shaft system often appear tile temperature too high or shafting vibration, etc. , have to stop, every day of the direct economic losses of more than 300 ten thousand yuan, so must pay attention to high reliability bearing research. In terms of hydropower unit, planning the construction of large hydropower base in our country, the new station capacity of about 92 million kW this undoubtedly the sliding bearing of form a complete set of hydroelectric equipment bring huge market, but also put forward higher requirements. As used in the three gorges power station under the hydro-generator rack centrosome inside the oil tank of thrust bearing on the total axial load of up to 5520, the head of thrust and mirror plate finish, hanging straight degree requirements is very high, allowing only 2 mm error. In addition, in terms of wind turbines, new fan unit in our country in the next five years is expected to reach 100 million kW. Although the current wind turbine are still mostly adopts rolling bearing, but in the yaw system, with the large-scale wind turbines, the weight of the engine room and passed to the tower increases torque, to scroll the yaw bearing roller design and manufacture of demand is higher and higher, lead to bearing manufacturing costs rise. Abroad has took the lead in more than one type of yaw system adopted the embedded friction sliding bearing, but our country began to start