The development of water lubricated bearing technology ( 2)

With independent intellectual property rights of more than 500 kinds of trunnion below 300 m middle and small scale す BTG water lubrication rubber bearing alloy series products. In addition, they further combines water lubrication rubber bearing and sealing device, the invention and development of water lubricated dynamic seal, results applied to the water out the ray, turbine, steam turbine, air compressor and water pump, etc. However, the water lubricated bearing is really form a production capacity of professional manufacturers, mainly in the United States Johnson Duramax Marine, Michigan Wheel Marine, British BTR, Dutch Maprom Engineering BV by BTG chongqing rush and China branch technology development co. , LTD. , etc. , its products: the overall feature of carrying capacity of 0. 246-0. 5 mpa, 0 in her work. 25 ~ 40 m/s 0 friction coefficient. 008-0. 025, 12500 h service life, etc. High-end gear transmission system in order to meet the current society demands for high end water lubricated bearing, as well as the application and spread, its product technical indicators are still need to further improve the manufacturing areas: domestic at present has not yet appeared in water lubrication for the bearing spindle units, but has begun a project pilot application abroad. STEVEN has developed a new type of feedback with surface throttling water hydrostatic bearing lubrication, the working speed of up to 10000 / min, compared with the hydraulic bearing has higher stiffness and machining accuracy, its damping characteristics can significantly improve the quality of surface processing and prolong tool life. Swiss IBAG company and Nintertheur Technical development HF170 HA - University cooperation 40 HKV type USES the water lubricated bearing for machine tool spindle bearing, the modified fan and air sealing system can effectively prevent water leak from the bearing, speed up to 4000 min, about 37 kw power, the United States around 2000 study of machine tool spindle water lubricated bearing a maximum speed of 4000 / min. TOMIO development such as water lubrication of dynamic and static pressure bearing is 60 mm diameter, velocity, 12000 / min. Domestic in static pressure water lubricated bearing industry has not been done in nuclear power: sliding bearing is used in the main pump rotor is PWR. In the second generation and second generation, the main pump guide bearing under water lubrication bearing, for the graphite bearing material, matching the journal of materials generally for heap Stellite alloy steel; For the surface of spherical bearing, which can realize the adjustment of. In three generations, whether it is in the American Westinghouse P1000 of shielding pump solutions or Germany KSB wet stator pump, main pump of the radial and thrust bearings for all water lubricated bearing. In shielding pump scheme, with immersion metal graphite bearing material, can bear the high temperature of 107 ℃. Pairing's pair of two schemes are based on graphite carbide, which mirror plate and the shaft sleeve surface plasma spray welding Stellite alloy. Along with the development of carbon materials and ceramic material, a variety of new material can be applied in the nuclear main pump water lubricated bearing at present, Germany KSB in its latest scheme has been successfully used in the C - C composite material, shows excellent effect. Harbin institute of big motor in China, xi 'an jiaotong university and other units also conducted against nuclear main pump bearing graphite, silicon fossil material research, but on the whole, at present our country in the aspect of nuclear main pump water lubricated bearing is still at the exploratory stage, not forming industry.