The general classification of bearings

1. Energy Dayton
China's large-scale power generation equipment such as generators, steam turbines and other manufacturers mainly include Dongfang Electric's large-scale OEMs, such as Dongfang Electric Group Co., Ltd. and Shanghai Electric Group. The power generation equipment has an industrial scale of several billion yuan every year. China has reached a higher level in large heavy-duty thrust bearings: However, in the high-speed heavy-duty product groups such as thermal power and nuclear power, China's bearing products still have a large gap with foreign countries, and high-end bearings rely on foreign countries on a large scale Technology, the bearing technology of my standard generator has been relatively mature, and most of them have been domestically produced, but he has more prominent problems in the material of the bearing, such as the Babbitt alloy secondary temperature, nuclear The material oxygen of the main water-lubricated bearing is still more difficult in the development of large-capacity unit bearings: there is still in-depth research on the theory and test of the rotor bearing system. In the nuclear power plant, China's nuclear main pump bearings are almost completely controlled by the United States, France, Russia and other countries. The technology is completely broken. China's core technology in nuclear manufacturing is almost blank, and there is no engineering application performance. Imported silicified graphite materials have very different physical and mechanical properties and unstable quality. The domestic single-capacity 1750MW nuclear power half-speed generator rotor support bearing developed by the latest EFR three-generation electric technology adopts AISTOM technology, and the segment has independent intellectual property rights and can only be processed according to the drawings. In short, the plain bearings required for large-scale energy equipment in the power generation industry have formed an industry, and the degree of autonomy of conventional unit bearings is relatively high, but the complete localization of bearings for million-kilowatt units will take time.
2. The Ship's Leadership
China's shipbuilding lags far behind Japan and South Korea in bearing level and its R & D capabilities. After the supporting oil engine sliding inspection and research and development, the service life of domestic products is often only 1/3 to 1/2 of similar foreign products. The low-speed diesel engine market is monopolized by MANB & W, Wartsila New Sulzer and Japan Mitsubishi Heavy Industries. At the same time, the bearing design problems caused by large-diameter, high-speed (500 10000 / min) marine gas turbines urgently need to be resolved. In addition, it is really
The only professional manufacturers that have formed production capacity are the few companies such as Johnson Duramax Marine in the United States, BTR in Michigan Wheel Marine in the United Kingdom, and Maprom Engineering BV in the Netherlands. Development Co., Ltd., China Shipbuilding Industry Corporation No. 71, etc. In recent years, Jiang Jian and other places have appeared a small number of small private enterprises engaged in the production of bearing products. Currently in the boat
Among the shaft water-lubricated bearings, the problems of heavy load, partial load, rubbing, noise, etc. of the large aspect ratio (211-411) bearing still need to be solved
3. Aerospace leader
The research of aerospace bearings in China is mainly led by the state. The research institutes and enterprises conduct cooperative research. The bearings such as aircraft and some missiles need to be imported, while the aerospace bearings such as liquid rocket engine bearings are completely independent of the current aerospace bearings Mainly based on dynamic bearings, surface dynamic and static pressure sliding bearings are an important development direction in rocket engine turbo pumps, which has attracted widespread attention abroad and have industrial application prospects. China's research and development departments have not yet had corresponding political, military and civil aviation aircraft. The environmental control system's high-speed air turbines, artificial satellites and spacecraft and other space vehicles love the motives of the plains.