Roller Bearings are a relatively common bearing in the bearings, the application is very extensive.
So, what should be noticed in the process of use?
First, look at the selection and control of the tolerance of the thrust roller bearing chamber:
1, thrust roller bearing thrust roller bearing should be rotated flexibly without blocking. If the obvious rotation is not flexible, it indicates that the shaft size is too large, the tolerance to be lowered. If the thrust roller bearing is pressed into the shaft and the hand rotates with the obvious "rustle" sensation, it may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, in the control of shaft and thrust roller bearing room tolerance also need to control the roundness, at present many manufacturers only on the tolerance control, not the roundness control.
2, thrust roller bearing assembly mode: Because the Roller Bearings are high-precision products, such as improper assembly is easy to thrust roller bearing groove damage, resulting in the thrust roller bearing damage. Roller Bearings In the assembly should be dedicated to the mold, can not be randomly beat, in the pressure into the shaft can only be small ring force, pressure large circle can only be large circle force. The assembly requires the use of air pressure or hydraulic pressure, in the upper and lower die in the case of the horizontal state, if the tilt will lead to the thrust roller bearing groove because of the force damage, and the thrust roller bearing to produce a guide ring.
3, the Assembly of foreign bodies to prevent: Roller Bearings in the rotor to do dynamic balance when it is easy to move the balance of the resulting iron into the Roller Bearings inside, it is best to install the thrust roller bearing before the balance. Some manufacturers in order to assemble conveniently, in the thrust roller bearing indoor coating some oil or grease lubrication effect, however, it is often difficult for operators to control the volume, if the oil or grease in the Roller Bearings in the indoor product, the Roller Bearings are easy to move along the shaft into the thrust roller bearing interior. The Thrust roller bearing chamber is best not to apply oil or grease, if not painted not to be controlled in the thrust roller bearing indoor accumulation.
4, Paint rust prevention: the characteristics of paint rust is more in the sealed type of motor, the motor in the assembly sound very good, but in the warehouse after some time, the motor abnormal sound changed very large, remove the Roller Bearings have serious rust phenomenon. Before many manufacturers will think that is the thrust roller bearing problem, after our constant publicity, now the motor factory has realized that the main problem is insulation paint. This problem is mainly because of the volatile acidic material of insulating varnish to form corrosive substances under certain temperature and humidity, and the thrust roller bearing is damaged after the channel corrosion. At present, the problem can only be a good selection of insulating varnish, and after drying after a period of ventilation assembly. In the process of using the thrust roller bearing, the most important thing is the length of service life. The length of the life is closely related to the manufacture, assembly and use of the bearing. In the use of the process must pay attention to day-to-day maintenance.