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Motor and pump bearing temperature standard - bearing knowledge

by:Waxing     2020-06-03
1, bearing temperature standard Standard 1, GB3215 4 pump bearing temperature. 4. 1 pump during the work, bearing the highest temperature does not exceed 80 ℃ 2, JB/T5294 3. 2. 9. 2 bearing temperature rise shall not exceed the environment temperature of 40, the highest temperature should not exceed 80 ℃ 3, JB/T6439 4. 3. 3 pump running under specified conditions, built in the bearing place outside surface temperature should not be higher than that of the medium temperature 20 ℃, the highest temperature is not higher than 80 ℃. Mounted bearings in external surface temperature should not be high temperature 40 ℃. The highest temperature is not higher than 80 ℃ 4, JB/T7255 5. 15. The use of three bearing temperature. Bearing temperature rise shall not exceed the ambient temperature 35 ℃, the highest temperature should not exceed 75 ℃, JB/T7743 7. 16. 4 bearing temperature rise shall not exceed the environment temperature 40 ℃, the highest temperature should not exceed 80 ℃ 6, JB/T8644 4. Bearing temperature rise shall not exceed 14 ambient temperature 35 ℃, the highest temperature should not exceed 80 ℃, the temperature of motor bearing provisions, the cause of the abnormal and handling procedures, the highest temperature rolling bearing does not exceed 95 ℃, sliding bearing the highest temperature does not exceed 80 ℃. And not more than 55 ℃ temperature ( Temperature rise of bearing temperature minus the test ambient temperature) ; Reason: shaft bending, the centerline is not allowed. Processing: find center again. Reason: basic screw loose. Processing: tighten the foundation screw. Reason: lubricating oil is not clean. Processing: change of lubricating oil. Reason: lubricating oil use time is too long, not replaced. Handling: wash bearing, oil change. Reason: in the ball or roller bearing damage. Processing: replace new bearing. According to the national standards, assessment of class F insulation class B, motor temperature control at 80 k ( Resistance method) 90 k ( Element method) 。 Considering the environmental temperature 40 ℃, the motor running the highest temperature should not exceed 120/130 ℃. The maximum permissible bearing temperature 95 degrees. Bearing are measured by using infrared detection gun on the surface of the outdoor temperature, the experience, the highest temperature should not exceed 70 ℃ the 4 pole motor. Don't need to monitor for motor ontology. Motor manufacturing is completed, in general, the temperature rise is basically fixed, not with the motor running mutations or growing. And bearing is wearing parts, need to test.
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