模拟界面污染条件下的电接触性能及磨损研究  

Electrical Contact Performance and Wear under Simulated Interface Pollution Conditions

作　　者：龚聪煜 聂裕宸 曹中清[1] 蔡振兵[1] GONG Cong-yu;NIE Yu-chen;CAO Zhong-qing;CAI Zhen-bing(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《装备环境工程》2022年第4期108-116,共9页Equipment Environmental Engineering

基　　金：国家自然科学基金项目(U1730131)。

摘　　要：目的模拟有机物挥发的气氛环境,研究载荷对界面污染条件下电接触性能的影响。方法选用铜作为基底,将其置于有机气氛环境中进行贮存。将初始表面与贮存后的表面作为待试验表面,将两者置于大气及有机气氛2种环境中进行电接触试验。通过摩擦系数和接触阻值分析其电接触性能,结合磨痕形貌、截面轮廓及成分,揭示其磨损机理。结果有机气氛环境中的气溶胶具有较高的接触电阻值,并且降低了摩擦系数。载荷较低时,接触阻值达到0.1Ω及以上。有机气氛中的磨痕深度减少至1μm以下,磨损减少。载荷较高时,2种环境中的接触阻值均能达到0.01Ω,但粘着磨损加剧。较初始试样,贮存后试样的接触电阻均有所增加,并且磨痕深度减少。结论有机气氛环境导致低载荷下的电接触性能明显下降,高载荷条件下接触副的磨损加剧。气溶胶具有一定的润滑性,可减少接触副之间的磨损。污染层具有较高接触阻值,且减少了接触副之间的磨损。The work aims to study the influence of load on the electrical contact performance under interface pollution conditions by simulating the atmosphere of organic volatilization.Copper was selected as the base and stored in an organic atmosphere.The original surface and the stored surface were used as the surface to be tested.They were subjected to sliding electric contact tests under different loads in the atmospheric and organic atmospheres.The electric contact performance was analyzed by the coefficient of friction and contact resistance.The wear mechanism was revealed by combining with the appearance,profile and composition of wear scars.Aerosols in organic atmosphere had higher resistance values and reduced friction coefficients.When the load was low,the contact resistance value reached 0.1Ω or above.In organic atmosphere,the wear depths decreased to less than 1μm,and the wear was reduced.When the load was high,the contact resistance could reach 0.01Ω in both environments,but the adhesion wear was aggravated.Compared with the original samples,the contact resistance of the stored samples increased,and the wear depths decreased.The results show that the electrical contact performance of organic atmosphere under low load decreases obviously.The wear of contact pair is aggravated under high load condition.Aerosol has certain lubricity and can reduce wear between contact pairs.The polluted layer has higher contact resistance and reduces the wear between contact pairs.

关 键 词：滑动磨损 电接触 界面污染 气氛环境 载荷 

分 类 号：TG115.58[金属学及工艺—物理冶金]