First: lubricating oil quality is worse? If the lubricant viscosity will cause bearing temperatures;
Second: If too tight bearing body Assembly, insufficient clearance will cause bearing temperatures;
Third: bearing too tight will cause bearing temperatures;
IV: the bearing ring on the shaft or in turn also led to increased bearing temperature;
V: bearing load too large will cause bearing temperatures;
Sixth: If bearing cage or scroll fragments, also results in bearing temperature.
Press bearing into bearing should rotate flexible sense of non-blocking. Subject to obvious turn flexible, then the axis dimensions are too large, tolerance to go down. Bearing onto the shaft turn by hand have significant "rustle" sense, the shaft tolerances may be too large or the roundness of the shaft well. So when the control shaft and housing tolerances to control the roundness, there are currently many of them only to control the tolerance, not to control the roundness.
Because the bearings are high-precision products, such as improper Assembly can easily cause damage to the bearing Raceway, causing damage to the bearings. Bearing Assembly should be dedicated mold, are somehow beating, only small forces when pressed into the shaft, pressure ring only ring force. Assembly required when using pneumatic or hydraulic, press-fit upper and lower die when outside in the level of State, such as tilt will cause damage to the bearing Raceway due to stress, the bearing rings.
Mount the bearing in rotor dynamic balance is easy to do on dynamic balancing produced when iron filings into the bearing, did before so it's best to be load bearing dynamic balancing. Some manufacturers in order to assemble, Assembly in the Interior bearing coated with some oil or grease lubrication, but often operators are difficult to control, if the oil or grease in the bearing room accumulates more easily along the axis of rotation of the bearing into bearing. The best bearing is not oil or grease, such as non-coating is not available to control shall not be bearing accumulates inside.
Paint rust is characterized by multiple sealed-type motor, motor Assembly has a good voice, but after some time within the warehouse, abnormal sound of motor and remove the bearing with serious rust. Many manufacturers are considered to be before bearing problems, through our advocacy, motor factory has now realized that largely insulated paint problems. The problem mainly because of the acidity of insulating varnishes containing volatile substances under certain temperature and humidity to form corrosive substances, corrosion, which cause bearing damage bearing Raceway. At present, the problem can only be a good selection of insulating varnishes, and after drying after a period of ventilation Assembly.

 


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