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轴承和电机的温升标准

2024-07-12

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考虑到环境温度40℃的情况,电机运行最高温度不能超过120/130℃。轴承温度最高允许95度。

一、轴承温度标准-泵轴承温度标准

1、GB3215  4.4.1 泵工作期间,轴承最高温度不超过80℃。  

2、JB/T5294  3.2.9.2 轴承温升不得超过环境温度40℃,最高温度不得超过80℃。

3、JB/T6439  4.3.3 泵在规定工况下运转时,内装式轴承处外表面温度不应高出输送介质温度20℃,最高温度不高于80℃。外装式轴承处外表面温升不应高处环境温度40℃。最高温度不高于80℃。  

4、JB/T7255  5.15.3 轴承的使用温度。轴承温升不得超过环境温度35℃,最高温度不得超过75℃。    

5、JB/T7743  7.16.4 轴承温升不得超过环境温度40℃,最高温度不得超过80℃。

6、JB/T8644  4.14 轴承温升不得超过环境温度35℃,最高温度不得超过80℃。

二、电机轴承温度规定、出现异常的原因及处理

规程规定,滚动轴承最高温度不超过95℃,滑动轴承最高温度不超过80℃。并且温升不超过55℃(温升为轴承温度减去测试时的环境温度)。

(1)原因:轴弯曲,中心线不准。处理;重新找中心。

(2)原因:基础螺丝松动。处理:拧紧基础螺丝。

(3)原因:润滑油不干净。处理:更换润滑油。

(4)原因:润滑油使用时间过长,未更换。处理:洗净轴承,更换润滑油。

(5)原因:轴承中滚珠或滚柱损坏。

处理:更换新轴承。按照国家标准,F级绝缘B级考核,电机温升控制在80K(电阻法),90K(元件法)。考虑到环境温度40℃的情况,电机运行最高温度不能超过120/130℃。轴承温度最高允许95度。用红外检测枪测量轴承室外表面的温度,经验上,4极电机最高点温度不能超过70℃。对于电机本体,不用监测。电机制造完成后,一般情况下,他的温升基本上是固定的,不会随着电机运行发生突变或者不断增长。而轴承是易损件,需要检测。

(来源:机械365)