The motor is the main power source to complete and ensure the normal operation of the unit, so when the motor fails, the loss will be considerable, especially the medium-sized motor, which will seriously affect the safe operation of the unit. According to the statistics of motor faults, it is found that the motor faults caused by damage of Miniature Deep Groove Ball Bearing or damage of Bearing account for more than 60% of all motor faults, therefore, to solve the motor bearing damage are also an important problem to solve the motor fault. According to the analysis, most medium-sized motor“End-cap sliding bearing”structures and“End-cap rolling bearing”structures. Failure to seize the opportunity to repair the equipment caused damage to the enterprise and caused a huge economic loss. Therefore, it is very important to correctly judge the defects of rolling bearings.

Maintenance of different types of bearings.

End cap sliding bearing type.

Most of these motors have bush heat, oil leakage, resulting in motor stator coil corrosion, motor internal oil, dust accumulation, resulting in poor ventilation, resulting in motor damage due to high temperature.

Box type high voltage motor.

Motor performance and appearance are better than“JS series” motor. The structure is installed in the bearing outside a very small clearance with the bearing oil baffle plate, which can keep enough grease in the bearing, but this structure has some disadvantages: not conducive to bearing heat dissipation and grease flow: because of repeated maintenance, need to remove the oil baffle plate, change the bearing, resulting in the oil baffle plate with the shaft with the hole lose, so that the oil baffle plate out of the shaft in operation, leading to failure.

Double bearing motor.

For some medium-sized motors, the load side uses a double-bearing structure. When the motor is overhauled, the bearing can not be cleaned and checked and must be replaced, otherwise, the maintenance quality can not be guaranteed and the maintenance cost increases. In addition, in this structure of the motor, most bearings in the operation of the temperature are high, reducing the service life of bearings, resulting in bearing damage.

The structural problem for Miniature Deep Groove Ball Bearing.

At present, the structure of the inner and outer oil cover is adopted in most motor-bearing accessories. The disadvantage of this structure is that the sealing effect is poor, and the dust inside and outside the motor can easily be sucked into the bearing, it accelerates the wear and tear of the bearing and the structure of the bearing accessories has little influence on the heat dissipation, cooling and grease circulation of the bearing, so the running temperature of the bearing is high and the service life of the bearing is reduced, causes the motor not to reach the overhaul period to damage the bearing.

Bearing selection problem.

The failure of the Miniature Deep Groove Ball Bearing is closely related to the choice of Bearing. The load-side bearings of medium-sized motors in China generally adopt “Medium-sized roller bearings”. The radial bearing capacity greatly exceeds the calculated value, but the allowable speed has little difference from the actual speed of the motor, which results in the bearing not reaching the rated service life. The load side of the imported medium-sized motor bearings generally uses a larger“Light ball bearing”, a no-load side is used than the load side of the“Light roller bearing”. This not only ensures the bearing capacity, but also allows the speed of the bearing greatly exceeds the actual speed of the motor, so can reach or exceed the bearing life.

JRZC BEARING has been established for more than 20 years, and now it has become a professional BEARING manufacturer with advanced BEARING production technology and the most advanced numerical control equipment in China. If you want to buy Miniature Deep Groove Ball Bearing, please feel free to contact us.