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Function: _error_handler
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2024-02-22
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Function: _error_handler
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轴承承受多高温度？
标准规定一般中小型电机滚动轴承的工作温度不得高于95℃。轴承实际能承受多高的温度呢？这个主要是由轴承钢、保持架、密封材料、润滑剂的耐热温度限制。
1 轴承钢的热处理尺寸稳定温度
对于普通轴承钢都有一个热处理稳定温度，在这个温度以下轴承保持尺寸稳定，同时轴承钢材质的硬度等也满足使用要求。一般轴承的热处理稳定温度为150℃。具体各个厂家轴承的热处理稳定温度会有不同。
FAG：
外径＜240mm的轴承为150℃；
外径≥240mm的轴承为200℃；
其它轴承用后缀标出。
SKF：
深沟球轴承为120℃；
圆柱滚子轴承为150℃；
球面滚子轴承为200℃。
2 轴承保持架温度范围
通常钢或者黄铜保持架能够承受的温度范围比较大，钢保持架的耐热温度可达300℃，黄铜保持架可达250℃，但对于尼龙保持架，一般能承受-40～+120℃的温度范围。
3 密封件的温度范围
对于封闭式轴承，金属材料防尘盖的，不需要特殊考虑温度范围。
对于橡胶材料密封件，就需要考虑了。
丁腈橡胶（NBR）工作温度范围是-40～+120℃，可以稳定工作于100℃以内，短时工作于120℃；
对于氟橡胶（FKM），可稳定工作于-30～+200℃，短时工作于230℃。
4 轴承润滑脂允许的温度范围
温度是影响润滑寿命的一个重要的因素。
随着温度的升高，润滑脂基础油粘度降低。基于70℃计算的润滑脂寿命，其运行温度每升高15℃，寿命将降低一半。
电机用轴承允许的工作温度应该是轴承各个零部件允许温度范围的交集（窄范围），只有在这个范围内才能保证轴承运行安全。因此，轴承能否运行于高温环境，主要在于润滑剂的选择，其次是轴承密封材料（仅对于封闭式轴承）和保持架，临末是轴承钢。
实际在应用中一般测到的温度是轴承外圈附近的温度，不同的测量方法和位置可相差15℃。一般轴承座比轴的散热条件好，所以内圈及滚动体的温度要比外圈高出5~10℃。
因此，当测试位置在轴承室以外时，若测出温度为95℃，内圈热点温度有可能会达到120℃。已经达到了尼龙保持架、进口深沟球轴承轴承钢、润滑脂的稳定耐热温度。
（来源：网络）
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Function: _error_handler
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Hangzhou Jingzhou Bearing Co.,Ltd.
Address：Liangzhu Indystrial City Hangzhou
Service hotline：0571-88777186 88777665
Jiangsu Jingzhou Bearing Co., Ltd.
Address：No.19, Yulan Avenue, Xuyi Economic DevelopmentZone, Huai’an City, Jiangsu Province
Service hotline：0517-80817777
Website：www.jzbearing.com
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