Bearing temperature standard - pump bearing temperature standard
1. GB3215 4.4.1 During pump operation, the maximum bearing temperature shall not exceed 80℃
2, JB/T5294 3.2.9.2 Bearing temperature rise shall not exceed the ambient temperature of 40, the highest temperature shall not exceed 80℃
3, JB/T6439 4.3.3 Pump under the specified operating conditions, the temperature of the outer surface of the inner bearing should not be 20℃ higher than the temperature of the transmission medium, the highest temperature is not higher than 80℃. The temperature rise of the outer surface of the outer mounted bearing should not be 40℃ at high ambient temperature. The maximum temperature is not higher than 80℃
4, JB/T7255 5.15.3 bearing temperature. Bearing temperature rise shall not exceed 35℃ ambient temperature, and the highest temperature shall not exceed 75℃
5, JB/T7743 7.16.4 bearing temperature rise shall not exceed the ambient temperature of 40℃, the highest temperature shall not exceed 80℃
6, JB/T8644 4.14 Bearing temperature rise shall not exceed 35℃ environmental temperature, the highest temperature shall not exceed 80℃
Ii. Motor bearing temperature regulation, abnormal causes and treatment
The regulations stipulate that the maximum temperature of rolling bearings does not exceed 95℃, and the maximum temperature of sliding bearings does not exceed 80℃. And the temperature rise shall not exceed 55℃ (temperature rise is the bearing temperature minus the ambient temperature at the time of test);
(1) Reason: axis bending, center line is not accurate. Processing; Find the center again.
(2) Cause: The foundation screw is loose. Treatment: Tighten the base screws.
(3) Reason: 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: clean the bearing and replace the lubricating oil.
(5) Cause: The ball or roller in the bearing is damaged.
Treatment: replace the new bearing. According to the national standard, grade F insulation grade B examination, motor temperature rise control in 80K (resistance method), 90K (component method). Considering the ambient temperature of 40℃, the maximum operating temperature of the motor should not exceed 120/130℃. The maximum bearing temperature is 95 degrees. The temperature of the outdoor surface of the bearing is measured with an infrared detection gun. Empirically, the temperature at the highest point of the 4-pole motor cannot exceed 70℃. For the motor body, no monitoring is required. After the motor is manufactured, under normal circumstances, his temperature rise is basically fixed and will not mutate or increase continuously with the motor operation. The bearing is a wearing part and needs to be tested. |
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