1, axis and self aligning ball bearing room tolerance selection and control: self aligning ball bearing pressed into self aligning ball after the rotation should be flexible and no blockage. If the apparent rotation is not flexible, the size of the shaft is too large and the tolerance should be down. If the self aligning ball bearing is pressed into the shaft with an obvious sand sand sense, it may be the tolerance of the shaft too large or the roundness of the shaft is not good. So when controlling the tolerance of shaft and self aligning ball bearing room, the roundness must also be controlled. At present, many domestic manufacturers only control tolerance, and do not control the roundness.
2, self aligning ball bearing assembly mode: because self aligning ball bearing is a high-precision product, such as improper assembly, it is easy to cause damage to self aligning ball aligning channel, resulting in the damage. Self aligning ball bearing in the assembly should have a dedicated mold, can not beat, in pressing axis only small force, only large force pressing circle. When assembling, it is required to use air pressure or hydraulic pressure. When the press is installed, the upper and lower die must be out of horizontal state. If there is tilt, the self aligning ball bearing channel will be damaged due to the force, so that the self aligning ball bearing will generate sound.
3, prevent foreign objects from assembling. When self aligning ball bearing is used to do dynamic balancing on the rotor, it is easy to enter iron and steel into self aligning ball bearing, so it is best to install self aligning ball before doing dynamic balancing. Some manufacturers for ease of assembly, assembly of some oil or grease lubrication effect in self aligning ball bearing indoor painted, but often the operator is difficult to control, if the oil or grease in the self aligning ball bearing indoor accumulates more, in the self aligning ball bearing along the axis rotates easily into the internal self aligning ball bearing. Self aligning ball bearing room is best not to oil or oil, such as non coating must not be controlled in the self aligning ball bearing indoors.
4, the prevention of lacquer rust: the characteristics of lacquer rust are mostly in the enclosed type motor. When the motor is assembled, the sound is very good. But after a few time in the warehouse, the abnormal sound of the motor changed a lot. The self aligning ball bearing was seriously rusted. In the past, many manufacturers would consider the problem of self aligning ball bearing. After our continuous propaganda, now the motor factory has realized that the problem is mainly the insulating varnish. This problem is mainly due to the acid substances volatilized from the insulating paint, which form corrosive substances under certain temperature and humidity. The corrosion of self aligning ball bearing channel leads to the damage of self aligning ball bearing. This problem can only be used as a good insulating varnish and is assembled after a period of ventilation after drying.
The life of self aligning ball bearing is closely related to manufacturing, assembly and use. We must do well in every link so that we can make self aligning ball bearing in the best running state, thereby prolonging the service life of self aligning ball.
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