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<p>Contact load is a key design parameter of rolling current frictional contact, which significantly impacts the stability and service life of conductive rotating electrical transmission devices. Under a rotational speed of 100 r/min and a current of 10 A, the slip–roll ratio, current-carrying friction performance, and surface wear mechanism of flexible rings under different loads were systematically studied. The results showed that as the contact load increased, the slip–roll ratio and contact resistance decreased, and the friction coefficient stabilized after decreasing to 0.25. When the load was less than 9.8 N, the dominant factor affecting friction was rolling, and at higher loads, the dominant factor was the load. The simulation results showed that as the load increased, the maximum shear stress in the contact area increased from 94.2 to 711.8&#xa0;MPa, which increased the wear, wear scar width, and surface plastic deformation layer thickness. Wear also led to a decrease in the degree of surface oxidation.</p>

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Effect of Contact Load on the Slip–Roll Behavior and Current-Carrying Tribological Properties of a Flexible Roll Ring

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Haihong Wu,
  • Zhiyuan Qian,
  • Lei Zhang,
  • Huiqun Liu,
  • Xiao Kang

摘要

Contact load is a key design parameter of rolling current frictional contact, which significantly impacts the stability and service life of conductive rotating electrical transmission devices. Under a rotational speed of 100 r/min and a current of 10 A, the slip–roll ratio, current-carrying friction performance, and surface wear mechanism of flexible rings under different loads were systematically studied. The results showed that as the contact load increased, the slip–roll ratio and contact resistance decreased, and the friction coefficient stabilized after decreasing to 0.25. When the load was less than 9.8 N, the dominant factor affecting friction was rolling, and at higher loads, the dominant factor was the load. The simulation results showed that as the load increased, the maximum shear stress in the contact area increased from 94.2 to 711.8 MPa, which increased the wear, wear scar width, and surface plastic deformation layer thickness. Wear also led to a decrease in the degree of surface oxidation.