初始静偏心与重力载荷对动车牵引电机转子轴心轨迹的影响

doi:10.3901/JME.2020.17.145

机械工程学报 ›› 2020, Vol. 56 ›› Issue (17): 145-154.doi: 10.3901/JME.2020.17.145

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初始静偏心与重力载荷对动车牵引电机转子轴心轨迹的影响

周生通¹, 朱经纬^1,2, 肖乾¹, 郭维年¹, 周新建¹

1. 华东交通大学机电与车辆工程学院南昌 330013;
2. 中国铁路广州局集团有限公司株洲车站株洲 412000

收稿日期:2019-07-12 修回日期:2020-03-24 出版日期:2020-09-05 发布日期:2020-10-19
通讯作者: 肖乾(通信作者),男,1977年出生,博士,教授,博士研究生导师。主要研究方向为轨道车辆轮轨关系、轨道车辆运行品质分析与评价、轨道车辆运维装备研究与开发。E-mail:jxralph@foxmail.com
作者简介:周生通,男,1984年出生,博士,讲师,硕士研究生导师。主要研究方向为轨道车辆牵引驱动系统动力学、转子动力学和工程可靠性。E-mail:zhoushengtong@foxmail.com
基金资助:
国家自然科学基金（51505146，51765018）、江西省自然科学基金（20161BAB216135，20181ACB20007）和西南交通大学牵引动力国家重点实验室开放课题（TPL1806）资助项目。

Initial Static Eccentricity and Gravity Load on Rotor Orbit of EMU Traction Motor

ZHOU Shengtong¹, ZHU Jingwei^1,2, XIAO Qian¹, GUO Weinian¹, ZHOU Xinjian¹

1. School of Mechatronics & Vehicle Engineering, East China Jiaotong University, Nanchang 330013;
2. Zhuzhou Railway Station, China Railway Guangzhou Group Co., Ltd., Zhuzhou 412000

Received:2019-07-12 Revised:2020-03-24 Online:2020-09-05 Published:2020-10-19

摘要/Abstract

摘要： 针对重力载荷下具有初始静偏心的动车牵引电机转子振动特性，首先利用磁势乘磁导法和Maxwell应力张量法给出了具有静动气隙偏心故障和任意磁极对数的电机空载/负载运行下的不平衡磁拉力统一解析表达式，然后采用Jeffcott模型建立了不平衡磁拉力、机械不平衡力和重力共同作用下的某型动车牵引电机转子系统动力学方程，并采用Runge-Kutta算法求解系统动力学响应，最后重点讨论了初始静偏心和重力载荷对牵引电机转子轴心轨迹和位移频谱的影响规律。结果表明：①重力载荷对电机转子系统的影响等价于在重力方向上施加一个恒定静偏心量，其与初始静偏心的矢量叠加组成气隙的综合静偏心量；②综合静偏心量的大小和方向影响转子轴心轨迹的位置和方向，偏心量越大转子轴心轨迹的偏移距离也越大且偏移方向沿静偏心方向；③静偏心量的增大使该型牵引电机转子轴心轨迹略微增大，可以认为基本不变，同时，静偏心量增大也使转子位移频谱成分更加显著和多样化。

关键词: 牵引电机, 初始静偏心, 重力载荷, 不平衡磁拉力

Abstract: Aiming at the rotor vibration characteristics of the traction motor in electric multiple units (EMU) with initial static eccentricity under gravity load, a unified analytical expression of unbalanced magnetic pull (UMP) of motor under no-load or load operations with static and dynamic air-gap eccentricity fault and arbitrary pole pairs is first given by using magnetic potential multiplying permeability method and Maxwell stress tensor method. Then, Jeffcott model is used to establish the dynamic equation of traction motor rotor system under action of UMP, mechanical unbalance force and gravity, and the Runge-Kutta algorithm is used to solve the dynamic response of the system. Finally, the influence of initial static eccentricity and gravity load on the orbits and displacement spectrum of the traction motor rotor is discussed. Results show that:① the effect of gravity load on the motor rotor system is equivalent to applying a constant static eccentricity in the direction of gravity, which superposes the initial static eccentricity vector to form a resultant static eccentricity in the air-gap; ② the magnitude and direction of the resultant static eccentricity affect the position and direction of the rotor orbit. The larger the eccentricity is, the larger the offset distance of the rotor orbit is and the offset direction is along the static eccentric direction; ③ The increase of static eccentricity makes the rotor orbits of this traction motor slightly increase, which can be considered as basically unchanged. At the same time, the increase of static eccentricity also makes the rotor displacement spectrum components more significant and diversified.

Key words: traction motor, initial static eccentricity, gravity load, unbalanced magnetic pull

中图分类号:

U266
TH113

周生通, 朱经纬, 肖乾, 郭维年, 周新建. 初始静偏心与重力载荷对动车牵引电机转子轴心轨迹的影响[J]. 机械工程学报, 2020, 56(17): 145-154.

ZHOU Shengtong, ZHU Jingwei, XIAO Qian, GUO Weinian, ZHOU Xinjian. Initial Static Eccentricity and Gravity Load on Rotor Orbit of EMU Traction Motor[J]. Journal of Mechanical Engineering, 2020, 56(17): 145-154.

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初始静偏心与重力载荷对动车牵引电机转子轴心轨迹的影响

Initial Static Eccentricity and Gravity Load on Rotor Orbit of EMU Traction Motor

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