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| Fluid lubricated bearings
(1) the liquid dynamic pressure bearing
The journal is completely separated from the working surface of the bearing by the oil film. Dynamic pressure Mold post ball cage bush, ball retainer bush,ball cage retainer must have: ? bearing a sufficient speed; ? have enough fuel supply, lubricating oil has a certain viscosity; ? journal and bearing the work surface with appropriate clearance. Multi-wedge dynamic pressure bearing to meet the high-precision rotary shaft requirements, long life. For high-speed and high-precision machinery, such as centrifugal compressor bearings.
(2) hydrostatic bearings
The journal and bearing are completely separated from the bearing film by a certain pressure supplied by the outside. The formation of the oil film is not limited by the relative sliding speed, and has a large bearing capacity at various speeds, including zero speed. Axis stability, to meet the requirements of high-precision rotary axis, the friction factor is small,DX Maginal Bushing high mechanical efficiency, long life.
(3) gas dynamic pressure, hydrostatic bearings
Gas dynamic pressure, hydrostatic bearing, with air or other gas as lubricant, friction factor is small, high mechanical efficiency, to meet the requirements to tell the operation. Gas bearings for gyro rotor, TV recorder bearings.
3. Non-lubricated bearings (plastic, carbon graphite bearings)
In the absence of oil or grease in the state of operation. Application less.
4. Others
(1) solid lubricating bearings
With graphite,bearing types, molybdenum disulfide, phthalocyanine blue dye, PTFE and other solid lubricants lubrication. For very low temperature, high temperature, high pressure, strong radiation, space, vacuum and other special working conditions.
(2) a. Magnetic fluid bearing magnetic fluid as a lubricant;
B. Electrostatic bearing with electric field so that shaft suspension;
C. Magnetic bearing magnetic field so that the shaft suspension.
Used for high-speed machinery and instruments. |
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