高压交流电动机轴电流引起的轴承故障与改进措施  

Bearing Failure of High Voltage AC Motor Caused by Shaft Current and the Prevention Measures

作　　者：沈蔚[1] 

机构地区：[1]中国石化上海石油化工股份有限公司公用事业部,上海200540

出　　处：《石油化工技术与经济》2016年第1期51-53,62,共4页Technology & Economics in Petrochemicals

摘　　要：针对同一台高压交流电动机反复出现轴承故障的现象,分析阐述了交流电动机内外部轴电压产生的原因,由于轴电压构成的回路电阻很小,以致很小的轴电压便会产生很大的轴电流。根据轴电流对轴承破坏的共同特征,对轴电流造成轴承损伤的机理进行分析,结合电动机检修管理的实践经验,提出了轴电流的防止措施和设防建议措施。In view of the repeated bearing failures on the same high voltage AC motor,the causes for generation of shaft voltage inside and outside the AC motor were analyzed. As the electric resistance in the return circuit constituted by the shaft voltage,a small shaft voltage will produce a large shaft current. Considering the common characteristics of bearing damage caused by shaft current,the mechanism of bearing damage was analyzed. Prevention measures and fortification suggestions for shaft current were raised based on the above analysis and practical experiences in motor maintenance and management.

关 键 词：交流电动机 轴承损伤 轴电流 分析 措施 

分 类 号：TM34[电气工程—电机]