Date: 2013-08-20

Improper treatment of affecting stable operation of FAG bearings vibration

Causes noise rolling bearings are more complex, one is the inner and outer rings mating surfaces of the bearing wear. Because of this wear, damage bearings, FAG bearings and shaft and shell the cooperation relations, causes the axis deviates from the correct location, noise resulting from the axis in high-speed motion. When you FAG bearing fatigue, its surface metal flake, also bearing radial clearance increases the noise. In addition, insufficient lubrication of the bearing, the formation of dry friction and bearings broken produces abnormal noises. After bearing wear loose, loose cage damage, would also have abnormal noise.
Institutional operation, install bearing parts allows a certain degree of temperature, when you touch body shell with your hand, should not feel hot to normal, instead it indicates that the bearing temperature is too high.
Bearing high temperature causes are: quality does not meet the requirements or deterioration of lubricant, lubricant viscosity is too high; body fitted too tight (insufficient gap), FAG bearing Assembly too tight; bearing washer on the shaft or in the shell rotation; load too large; bearing cage effects of fragmentation, such as or.
Selection and control of shaft and housing tolerances: bearing pressed into the bearing should rotate flexible no block. If there are clearly not flexible rotation, then axis dimensions are too big, the tolerance to cut. Like FAG bearing onto the shaft by hand after turning there is a clear "rustle" sense, the tolerances of the shaft may be too large or the roundness of the shaft well. So when you control the shaft and housing tolerances you want to control the roundness, many domestic manufacturers currently control only tolerance, not to control the roundness.
FAG bearings are high-precision products, such as improper Assembly can easily cause damage to the bearing Raceway, cause damage to the bearing. Bearing Assembly should have dedicated mold, cannot be beat at will, force in pressing axis only small circles, pressing circle only large ring bearing. Assembly call for pneumatic or hydraulic, pressing up or down when touched to be outside on the level of State, such as tilt can cause mechanical damage of bearing Raceway and the bearing rings. Many manufacturers are considered to be before bearing problems, through our advocacy, motor factory is now aware of the main insulation paint problems. Varnishes used for this issue mainly because of volatile acids under certain temperature, humidity of the formation of corrosive substances, corrosion and cause damage to the bearing Raceway FAG bearings. The problem can only be good choice of insulating varnish, and assembled in the ventilation after drying after a period of time.

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