The Motor Bearing Discharge Breakdown Based on the Multi-Physics Field Analysis

被引：0
|
作者：
Wang Q. [1 ]
Liu R. [1 ]
Ren X. [1 ]
机构：
[1] School of Electrical Engineering, Beijing Jiaotong University, Beijing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2020年 / 35卷 / 20期
关键词：
Bearing breakdown; Electric-thermal coupling; Electrical corrosion of the bearing; High frequency bearing current; The minimum oil film thickness;
D O I：
10.19595/j.cnki.1000-6753.tces.191138
中图分类号：
学科分类号：
摘要：
Motor bearing discharge process is a key problem in the research of the high frequency bearing current and bearing damage. The multi-physics finite element calculation was adopted to analyze the bearing breakdown process and mechanism. Firstly, combined with the elastohydrodynamic lubrication theory, the formula of the Hertz contact area and the minimum thickness of the bearing oil film between the bearing balls and the bearing races were obtained. Then the bearing breakdown model was established. The electric-thermal coupling simulation of the bearing breakdown was carried out and the temperature rise of the bearing under a certain current excitation was obtained. Finally, based on the melt temperature of the bearing steel, a method for determining the critical current of the bearing electrical corrosion was proposed. © 2020, Electrical Technology Press Co. Ltd. All right reserved.
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页码：4251 / 4257
页数：6
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