林彤
LIN Tong

• 1:浙江浙能乐清发电有限责任公司

摘要(Abstract)：

某引风机运行过程中发生了电动机轴承烧损故障,分析原因为增装的测温元件未使用绝缘底座,造成轴承通过测温元件保护外套与电动机外壳接地,在转子、机座、前后轴承等部件构成回路,产生轴电流,从而导致电动机轴承烧损。
Overburning of motor bearing happened in the operation of induced draft fan in a power plant. The reason is concluded by analysis that the added temperature measurer does not use insulating material, resulting bearing earthing though protective sleeve of temperature measurer and motor casing. Therefore, a return circuit among rotor, the frame and the front and back bearings is formed and shaft current is produced, leading to overburning of motor bearings.

关键词(KeyWords)： 引风机;电动机轴承;测温元件;绝缘;轴电流;轴电压
induced draft fan;motor bearing;temperature measurer;insulation;shaft current;shaft voltage

Abstract:

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基金项目(Foundation):

作者(Author): 林彤
LIN Tong

DOI: 10.19585/j.zjdl.2015.05.011

参考文献(References)：

• [1]GB/T 13002-2008旋转电动机热保护[S].北京:中国电力出版社,2008.
• [2]赵家礼.电动机修理手册[M].北京:机械工业出版社,1992.
• [3]朱启东.电机学[M].北京:科学出版社,1982.