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复杂机车振动环境下牵引电机轴承服役寿命评估

刘禹清 陈再刚 閤鑫 王开云

刘禹清, 陈再刚, 閤鑫, 王开云. 复杂机车振动环境下牵引电机轴承服役寿命评估. 力学学报, 2022, 54(7): 1820-1829 doi: 10.6052/0459-1879-21-545
引用本文: 刘禹清, 陈再刚, 閤鑫, 王开云. 复杂机车振动环境下牵引电机轴承服役寿命评估. 力学学报, 2022, 54(7): 1820-1829 doi: 10.6052/0459-1879-21-545
Liu Yuqing, Chen Zaigang, Ge Xin, Wang Kaiyun. Service life evaluation of traction motor bearings in complicated vibration environment of a locomotive. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(7): 1820-1829 doi: 10.6052/0459-1879-21-545
Citation: Liu Yuqing, Chen Zaigang, Ge Xin, Wang Kaiyun. Service life evaluation of traction motor bearings in complicated vibration environment of a locomotive. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(7): 1820-1829 doi: 10.6052/0459-1879-21-545

复杂机车振动环境下牵引电机轴承服役寿命评估

doi: 10.6052/0459-1879-21-545
基金项目: 国家自然科学基金资助项目(52022083, 51775453, 51735012)
详细信息
    作者简介:

    陈再刚, 研究员, 主要研究方向: 车辆传动系统动力学、列车耦合动力学及轮轨关系. E-mail: zgchen@home.swjtu.edu.cn

  • 中图分类号: O346

SERVICE LIFE EVALUATION OF TRACTION MOTOR BEARINGS IN COMPLICATED VIBRATION ENVIRONMENT OF A LOCOMOTIVE

  • 摘要: 牵引电机是铁路机车的动力源, 其关键零部件(支承轴承等)的服役性能直接影响机车传动系统的稳定性和可靠性. 对于重载机车, 传统轴承服役寿命评估方法主要基于定载荷工况, 难以准确评估轨道不平顺等复杂外部激励作用下电机轴承的服役寿命. 因此, 本文根据车辆-轨道耦合动力学理论, 考虑轨道车辆运行过程中的轮轨相互作用和齿轮啮合作用, 建立了具有牵引动力传动系统的机车-轨道耦合动力学模型; 采用线性损伤累积准则和ISO 281标准计算方法, 评估了复杂机车振动环境下牵引电机轴承的服役寿命. 结果表明, 在轨道随机不平顺激励下, 机车轮轨垂向力、齿轮啮合力、牵引电机内部转子离心力、不平衡磁拉力等明显增大; 在复杂机车振动环境中, 电机轴承内部滚子-滚道相互作用加剧, 传动端与非传动端轴承的疲劳寿命缩短; 随着线路状态的不断恶化和机车运行速度的提高, 牵引电机轴承的预测寿命里程不断减小; 由于传动端轴承承受较大的外部动态载荷, 传动端轴承的服役寿命明显低于非传动端轴承. 本文提出的评估方法可为机车牵引电机轴承的设计、选型和寿命评估提供理论指导.

     

  • 图  1  机车-轨道耦合动力学模型示意图

    Figure  1.  Stamic of locomotive-track coupled dynamics model

    图  2  滚动轴承动力学示意图

    Figure  2.  Stamic of rolling bearing

    图  3  机车牵引电机轴承服役寿命评估流程图

    Figure  3.  Flow chart of service life evaluation of traction motor bearings in a locomotive

    图  4  系统主要激励

    Figure  4.  Main excitation of system

    5  机车系统动态激励

    5.  Dynamic excitation of the locomotive system

    图  5  机车系统动态激励(续)

    Figure  5.  Dynamic excitation of the locomotive system (continued)

    图  6  电机轴承服役状态及疲劳损伤

    Figure  6.  Service conditions and fatigue damage of motor bearings

    图  7  轨道随机不平顺对机车系统和牵引电机轴承的影响

    Figure  7.  Effect of track random irregularity on locomotive system and traction motor bearings

    8  相对恒定车速对机车系统和牵引电机轴承的影响

    8.  Effect of relatively constant velocity on locomotive system and traction motor bearings

    图  8  相对恒定车速对机车系统和牵引电机轴承的影响(续)

    Figure  8.  Effect of relatively constant velocity on locomotive system and traction motor bearings (continued)

    表  1  牵引电机轴承参数

    Table  1.   Main parameters of the traction motor bearings

    Value
    Driving end bearingNon-driving end bearing
    radius of inner race/mm 53.5 45
    radius of outer race/mm 72.5 62
    radius of roller/mm 9.5 8.5
    length of roller/mm 40 24
    number of rollers 17 14
    number of columns 1 1
    bm 1.1 1.1
    fc 84.3 84.3
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-10-25
  • 录用日期:  2021-12-28
  • 网络出版日期:  2021-12-29
  • 刊出日期:  2022-07-15

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