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Reasons and treatment of bearing temperature rise

Writer: admin Time:2021-09-28 14:10 Browse:

Reasons and treatment of bearing temperature rise

(1) Reason: The shaft is bent and the center line is not accurate. Deal with; find the center again.
(2) Reason: The foundation screw is loose. Treatment: Tighten the foundation screws.
(3) Reason: The lubricating oil is not clean. Treatment: Replace the lubricating oil.
(4) Reason: The lubricating oil has been used for too long and has not been replaced. Treatment: Wash the bearings and replace the lubricating oil.
(5) Reason: The ball or roller in the bearing is damaged. Treatment: Replace with new bearings.
According to the national standard, F-level insulation and B-level assessment, the temperature rise of the motor is controlled at 80K (resistance method) and 90K (component method). Taking into account the ambient temperature of 40 degrees, the maximum operating temperature of the motor cannot exceed 120/130 degrees. The maximum allowable bearing temperature is 95 degrees. Use an infrared detection gun to measure the temperature of the outer surface of the bearing. Empirically, the highest point temperature of a 4-pole motor cannot exceed 70 degrees. For the motor body, there is no need to monitor. After the motor is manufactured, under normal circumstances, its temperature rise is basically fixed, and it will not change abruptly or continuously increase with the operation of the motor. The bearing is a vulnerable part and needs to be tested.


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