A plane bearing fault feature showed a serious fault is less than a week time, large equipment, bigger, faster, the shorter time intervals. Therefore, the bearing fault diagnosis of actual, once found fault, its advanced function, should decisively determine the bearing fault, repaired as soon as possible.
Selection and control 1, slewing ring bearings shaft and bearing chamber tolerance: press bearing plane bearing should be flexible rotation not block a sense of. If there is obviously the rotation is not flexible, indicates that the axial size is too large, the tolerance to cut. If the bearing onto the shaft by hand after turning has obvious "rustle" sense, the tolerances of the shaft may be too large or the roundness of the shaft is not good. So in the control of the shaft and housing tolerances to control the roundness, many domestic manufacturers only on tolerance control, no control of roundness.
2, the bearing assembly: because the bearings are Other bearing precision products, such as improper assembly is easy to bearing raceway damage, cause damage to the bearing. Bearing assembly shall have the special mould, can not be beat, after pressing shaft when only small force, force pressure when only circle circle. The assembly by pneumatic or hydraulic press, the upper and lower mold to outside in the horizontal state, if tilt will cause the plane bearing raceway damage due to stress, and the bearing guide ring.
3, to prevent foreign bodies bearing assembly: easily mounted to the rotor dynamic balance when the dynamic balance of iron filings into bearing interior, so it is best to install bearing dynamic balancing. Some manufacturers in order to convenient assembly, the assembly of some oil or grease lubrication effect in the bearing chamber painted, but the operation is often difficult to control, if the oil or grease in the bearing chamber accumulates more, in the bearing rotates easily along the shaft into the plane bearing. The bearing chamber Triple row roller slewing bearing is best not to oil or grease, such as non coated not to control may not be in the bearing chamber of accumulation.
4, rust prevention paint: paint rust is characterized by multiple sealed type motor, the motor voice in the assembly is very good, but in some time within the warehouse, the electrical noise change greatly, remove bearing with serious rust. Many manufacturers are considered to be before the bearing problem, through our advocacy, motor factory is now aware of the main insulation paint problems. This is mainly because the acidic material insulating paint volatile out of the formation of corrosive substances under certain temperature, humidity, the plane bearing groove corrosion cause bearing damage. The problem can only be good choice of insulating varnish, and after drying ventilation for a worm gear speed reducer period of time after the assembly.
We should arouse our vigilance bearing assembly in the defects and other countries, failure is often very fast, very suddenly. That is after two hours, examples of this digital measurement of rotor shaft end.
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