The bearing temperature are the main reason:
1: whether the lubricating oil quality deterioration? If the viscosity of lubricating oil can also result in FAG bearings temperature rise;
2: bearing assembly if too tight, the gap will lead to inadequate flange bearing temperature rise;
3: bearing assembly too tight will result in bearing temperature rise;
4: Race rotation on the shaft or shell will result in bearing temperature rise;
5: the bearing load is too large will result in bearing temperature rise;
6: if the bearing cage or a rolling body broken words, will result in bearing temperature rise.
Press bearing FAG bearing should be flexible rotation block. If there are obvious rotation is not flexible, indicates that the axial size is too big, the tolerance to cut. Such as FAG 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 should also control the roundness, at present many domestic manufacturers control only tolerance, not to control the roundness.
Because the flange bearing is high precision products, such as improper assembly is easy to bearing raceway caused damage, cause damage to the bearing. FAG bearing assembly shall have a special mold, can not be beat, after pressing shaft when only small force, force pressure when only circle circle. The assembly requires use of a pneumatic or hydraulic, in pressing die down to external to the state level, if tilt will cause the bearing groove because of stress damage, and the bearing guide ring.
Bearing easily mounted to the rotor dynamic balance when the dynamic balance of iron filings into FAG bearing, so it is best to install FAG 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 flange bearing. The bearing chamber is not the best oil or grease, such as the non coated not to control shall not be in the bearing chamber of accumulation.
Paint rust is characterized by multiple motor sealed, motor sound in the assembly is very good, but in the warehouse put some time later, motor noise becomes large, remove the FAG bearings with serious rust. Many manufacturers will think is the flange bearing problems, after continuous publicity our, motor factory is now aware of the problem is the main insulating paint. The problem is mainly because the acidic material insulating paint volatile out the formation of corrosive substances under certain temperature, humidity, the bearing groove corrosion cause bearing damage. The problem can only be good choice of insulating varnish, and after drying in air for a period of time after the assembly.