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<p>With the development of high-speed trains, subways, new energy vehicles, and other high-power driving motors, motor bearings are increasingly subjected to stronger electric field environments. Addressing the wavy electro-erosion damage observed on bearing raceways and roller surfaces, this study replicated the origin and development process of electro-erosion waves through a pre-fabricated defect test. Within 25 h, the test successfully induced electro-erosion waves on one side of the defect. Findings revealed that both the rolling surface and end face of the roller exhibited strictly symmetrical distribution characteristics in their electro-erosion morphology. Furthermore, the electro-erosion corrosion waves propagated exclusively along a single circumferential direction. Across the entire bearing, these waves symmetrically appeared on symmetrically distributed rolling elements. By establishing a spatial coordinate system, the study elucidated the nucleation, development, and maturation processes of the electro-erosion corrosion waves. These findings provide crucial theoretical foundations for preventing bearing electro-erosion corrosion failures and extending bearing service life.</p>

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Experimental study on the evolution of electro-erosion waves in bearing rollers under current-carrying conditions

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Yuqing Fan,
  • Junsheng Yang,
  • Shaobo Gao,
  • Jin Liu,
  • Tianbao Ma

摘要

With the development of high-speed trains, subways, new energy vehicles, and other high-power driving motors, motor bearings are increasingly subjected to stronger electric field environments. Addressing the wavy electro-erosion damage observed on bearing raceways and roller surfaces, this study replicated the origin and development process of electro-erosion waves through a pre-fabricated defect test. Within 25 h, the test successfully induced electro-erosion waves on one side of the defect. Findings revealed that both the rolling surface and end face of the roller exhibited strictly symmetrical distribution characteristics in their electro-erosion morphology. Furthermore, the electro-erosion corrosion waves propagated exclusively along a single circumferential direction. Across the entire bearing, these waves symmetrically appeared on symmetrically distributed rolling elements. By establishing a spatial coordinate system, the study elucidated the nucleation, development, and maturation processes of the electro-erosion corrosion waves. These findings provide crucial theoretical foundations for preventing bearing electro-erosion corrosion failures and extending bearing service life.