The abnormal noise of the motor becomes very big

If the bearing is pressed into the shaft and turned by hand, there is an obvious 'sand' feeling, it may be because the tolerance of the shaft is too large or the roundness of the shaft is not good. For the convenience of assembly, some manufacturers apply some oil or grease to the bearing chamber for lubrication effect during assembly. If there is obvious inflexible rotation, it indicates that the size of the shaft is too large and the tolerance should be lowered. It is best not to coat the bearing room with oil or grease. It is easy to enter the inside of the bearing along the shaft. For more information, please continue to pay attention to needle roller bearings!. When pressing into the shaft, only the small circle can receive force, and the large circle can only receive force. 4. Severe rust phenomenon. The sound of the motor is very good during assembly, but after some time in the warehouse, the abnormal noise of the motor becomes very big.

When assembling the bearing, there should be a special mold, which can not be knocked at will. If there is a tilt, the bearing channel will be damaged due to force, which will cause the bearing to produce noise. This problem is mainly because the acidic substance volatilized from the insulating paint forms corrosive substances at a certain temperature and humidity, which causes bearing damage after corroding the bearing groove. In the past, many manufacturers thought it was a bearing problem. Prevention of lacquer rust: The characteristic of lacquer rust is that it mostly occurs in sealed motors. At present, the problem can only be to choose a good insulating paint and ventilate for a period of time after drying and then assemble. If a large amount of oil or grease accumulates in the bearing chamber, it will be very difficult when the bearing rotates.

Therefore, when controlling the tolerance of the shaft and the bearing chamber, the roundness must be controlled. 2. Prevention of assembling foreign matter: When the bearing is installed on the rotor for dynamic balance, it is easy to enter the iron filings generated during the dynamic balance into the bearing, so it is best to perform dynamic balance before installing the bearing. The life of a bearing is closely related to manufacturing, assembly, and use, and every link must be done well in order to make the bearing in the best operating state, thereby extending the life of the bearing. Remove the bearing. Bearing assembly method: Because bearings are high-precision products, improper assembly can easily cause damage to the bearing raceway and cause bearing damage.

At present, many domestic manufacturers only control the tolerance, but not the roundness. If it is absolutely necessary, it must be controlled not to accumulate in the Mechanical roller bearing manufacturers bearing room. However, it is often difficult for operators to control the amount. When assembling, it is required to use air pressure or hydraulic pressure, and the upper and lower molds should be outside the horizontal state during press-fitting. Tolerance selection and control of shaft and bearing chamber: After the bearing is pressed into the bearing, it should rotate flexibly without any sense of blocking. 3. After our constant publicity, now the motor factory has realized that it is mainly the problem of insulating paint