Bearing clearance test and lifetime analysis for EMU traction motor

GENG Min; ZHAO Pengyu; LI Xiaoyang; LEI Guanbiao; WANG Xilian

doi:10.13890/j.issn.1000-128X.2022.04.024

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Bearing clearance test and lifetime analysis for EMU traction motor

Detection Technology | 更新时间：2024-08-02

- Bearing clearance test and lifetime analysis for EMU traction motor
- Electric drive for locomotives Issue 4, Pages: 166-171(2022)
- 作者机构：
  
  1.中车唐山机车车辆有限公司动车检修部，河北唐山　　063035
  2.北京交通大学电气工程学院，北京;100044
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2022.04.024
  CLC： TH133.3;U266.2
- Published：10 July 2022，
  
  Received：11 September 2021，
  
  Revised：10 June 2022，
- 稿件说明：
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GENG Min, ZHAO Pengyu, LI Xiaoyang, et al. Bearing clearance test and lifetime analysis for EMU traction motor. [J]. Electric drive for locomotives (4):166-171(2022)
DOI：

GENG Min, ZHAO Pengyu, LI Xiaoyang, et al. Bearing clearance test and lifetime analysis for EMU traction motor. [J]. Electric drive for locomotives (4):166-171(2022) DOI： 10.13890/j.issn.1000-128X.2022.04.024.

摘要

传统轴承寿命预测算法只考虑了机械载荷的影响，但对于实际工况中的动车组牵引电机，由于其转子会承受额外的径向电磁力，因此牵引电机轴承也会被附加额外的电磁载荷。同时，牵引电机轴承游隙的大小也会影响电机转子的径向电磁力受力情况。文章对基于L-P理论和考虑电磁载荷的动车组牵引电机轴承寿命计算方法进行了分析介绍。为得到实际的动车组牵引电机轴承游隙情况，对实车牵引电机轴承游隙进行了测试，并对测试结果进行了统计分析。基于动车组实测的牵引电机轴承游隙计算了牵引电机轴承在径向上可能承受的电磁力大小。考虑该电磁力的影响，对相应牵引电机轴承的寿命进行了预测分析。分析结果表明，动车组牵引电机轴承游隙大小的变化对牵引电机轴承寿命有不可忽略的影响。对动车组牵引电机轴承游隙的测试与寿命分析结果可为动车组牵引电机轴承维修维护提供指导。

Abstract

The mechanical load is the only factor of influence considered in the traditional bearing lifetime prediction algorithm. However

for the traction motor of the electric multiple units (EMUs) in actual working conditions

its bearing is also subject to the additional electromagnetic load derived from the additional radial electromagnetic force acting on its rotor

which is under effect of bearing clearance. In this paper

the calculation method of bearing lifetime for the EMU traction motor based on the L-P theory and considering the electromagnetic load was expounded. In order to reveal the actual bearing clearance for the EMU traction motor

test was conducted in the real EMU scene

and the test results were statistically analyzed. Based on the measured bearing clearance of the EMU traction motor

the radial electromagnetic force probably acting on the traction motor bearing was calculated. Considering the influence from the electromagnetic force

the lifetime of the corresponding traction motor bearing was predicted and analyzed. The results show that any change in bearing clearance of the EMU traction motor has a considerable influence on the bearing lifetime of the traction motor. The test and lifetime analysis results of bearing clearance for the EMU traction motor provide guidance for the maintenance of EMU traction motor bearings.

关键词

动车组动车牵引电机轴承游隙偏心磁拉力轴承寿命高速列车

Keywords

EMUEMU traction motorbearing clearanceeccentric magnetic pullbearing lifetimehigh-speed train

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