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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference; 20071022-24; San Diego,CA(US) >INFLUENCE OF SURFACE ROUGHNESS ON FRICTION AND CONTACT RESISTANCE IN SLIDING ELECTRICAL CONTACTS
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INFLUENCE OF SURFACE ROUGHNESS ON FRICTION AND CONTACT RESISTANCE IN SLIDING ELECTRICAL CONTACTS

机译：滑动电触头中表面粗糙度对摩擦力和接触电阻的影响

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摘要

An experiment is conducted to investigate the role of surface roughness on the coefficient of friction and contact resistance of sliding electrical contacts. A hemispherical pin is sliding along both smooth and rough 2-meter rail surface. Tests are performed at both low and moderate sliding speed and for a range of electrical current densities, ranging from 0 to about 12 GA/m~2. It was found that surface roughness had a significant influence on the coefficient of friction, with the smoother surfaces exhibiting higher coefficients of friction. Contact resistance, on the other hand, did not show as strong an effect of surface roughness, except for a few parameter combinations. At the higher current densities studied ( > 10 GA/m~2), it was found that the contact resistance values tended to be on the order of 1 mΩ, independent of load, speed and roughness. This convergence may be due to presence of liquid metal film at the interface, which established ideal electrical contact.
机译：进行了一项实验，以研究表面粗糙度对滑动电触点的摩擦系数和接触电阻的作用。半球形销钉沿着光滑和粗糙的2米导轨表面滑动。在低速和中速滑动速度以及0至约12 GA / m〜2的电流密度范围内进行测试。发现表面粗糙度对摩擦系数有显着影响，较光滑的表面表现出较高的摩擦系数。另一方面，除了一些参数组合之外，接触电阻没有显示出对表面粗糙度的强烈影响。在较高的电流密度下（> 10 GA / m〜2），发现接触电阻值趋于在1mΩ左右，与负载，速度和粗糙度无关。这种收敛可能是由于在界面处存在液态金属膜，从而建立了理想的电接触。

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