The fluid-lubricated bearings
(1) hydrodynamic bearings
Between the journal and roller bearing surface of the film are completely separated. Hydrodynamic bearings must have: ① bearing sufficient speed; ② have sufficient amount of oil, lubricating oil has a certain viscosity; ③ between the journal and the bearing surface with the appropriate clearance. More oil wedge hydrodynamic bearing axis to meet the requirements of high-precision rotation, long life. For high-speed and high-precision machinery, such as centrifugal compressor bearings.
(2) hydrostatic bearing
DU-B bronze backing sleeve bushing oil film bearings are outside a certain pressure supplied completely separated, limited slip velocity of the oil film is not a relative, have a greater carrying capacity in a variety of speeds (including zero speed) down. Stability shaft to meet the requirements of high-precision rotary axes, the friction coefficient is small, high mechanical efficiency, long life.
(3) gas dynamic pressure, static pressure bearing
Gas dynamic pressure, static pressure bearing, as lubricant with air or other gases, friction coefficient, high mechanical efficiency, to meet the requirements of the operation told. Gas bearings are used as the gyro, TV video bearing.
3. The non-lubricated bearings (plastic, carbon graphite bearing)
Operate without lubricating oil or grease state. Seldom used.
4. Other
(1) FB090-W thrust washer
Graphite, molybdenum disulfide, phthalocyanine dyes, solid lubricants such as PTFE lubrication. For a very low temperature, high temperature, high pressure, high radiation, space, vacuum and other special working conditions.
. (2) a magnetic bearing magnetic fluid flow as a lubricant;
. B Field static electricity so that the shaft bearing suspension;
c. magnetic bearings using a magnetic field so that the shaft suspension.
Used for high-speed machinery and instrument.
Yilecicad replied
488 weeks ago