What are the standards for the temperature of motor bearings? Dalan Motor refers to the following points to explain carefully what are the standards for the temperature of the motor bearing? Dalan Motor will explain it carefully with reference to the following points:
1. During the operation of the motor, the maximum temperature of the bearing does not exceed 80 °C.
2. The temperature rise of the bearing shall not exceed 40 °C of the ambient temperature, and the maximum temperature shall not exceed 80 °C.
3. When the motor is running under the specified working conditions, the temperature of the outer surface of the built-in bearing should not be higher than the temperature of the conveying medium by 20 °C, and the maximum temperature is not higher than 80 °C.
4. The external surface temperature rise of the externally mounted bearing should not be high at an ambient temperature of 40 °C, and the maximum temperature is not higher than 80 °C.
5, the use of the bearing temperature: bearing temperature rise must not exceed the ambient temperature of 35 ° C, the maximum temperature must not exceed 75 ° C.
6. The maximum temperature of the rolling bearing does not exceed 95 °C, and the maximum temperature of the sliding bearing does not exceed 80 °C. And the temperature rise does not exceed 55 ° C (temperature rise is the bearing temperature minus the ambient temperature at the test).
The reasons for the abnormality of the motor bearing are as follows:
1. The shaft is bent and the center line is not allowed.
2. The basic screws are loose.
3. The lubricating oil is not clean.
4. The lubricating oil has been used for a long time and has not been replaced.
5. The ball or roller in the bearing is damaged.
The processing method for the above exceptions is as follows:
1. Re-find the center.
2. Tighten the foundation screws.
3. Replace the lubricant.
4. Wash the bearings and replace the lubricant.
5. Replace the new bearing.
According to national standards, the temperature rise of Class F insulated motors is controlled at 80K (resistance method) or 90K (component method). Considering the ambient temperature of 40 ° C, the maximum motor operating temperature can not exceed 120 ° C. The bearing temperature is up to 95 °C. The temperature of the outdoor surface of the bearing is detected by infrared rays, and the maximum temperature of the 4-pole motor cannot exceed 70 °C. For the motor body, no monitoring is required. After the motor is manufactured, in general, his temperature rise is basically fixed and will not change or increase with the operation of the motor. The bearing is a consumable part and needs to be tested.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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