不同转速下纯铜滚动载流摩擦副的电弧行为及电损伤  

Arc Behavior and Electrical Damage of Rolling Current-carrying Cu Pairs at Different Rotating Speeds

作　　者：李家伟 张燕燕[1] 宋晨飞[1] 孙逸翔 陈天骅 张永振[1,2] LIJiawei;ZHANG Yanyan;SONG Chenfei;SUN Yixiang;CHEN Tianhua;ZHANG Yongzhen(National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang 471023;Wuhan Research Institute of Materials Protection,China Academy of Machinery Science and Technology,Wuhan 430030)

机构地区：[1]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,洛阳471023 [2]机械科学研究总院集团有限公司武汉材料保护研究所有限公司,武汉430030

出　　处：《机械工程学报》2021年第15期168-176,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(51775173,U1804252)。

摘　　要：采用FTM-CF100型滚动摩擦磨损试验机,以铜盘对滚摩擦副为例研究了转速对滚动载流摩擦性能规律和损伤机制的影响,重点关注了滚动摩擦电弧行为和摩擦副表面电损伤。随着转速的增加,平均滚动载流摩擦因数逐渐减小且总是高于机械摩擦因数,实时电流更容易出现剧烈波动。同时,高转速下电弧出现的初始时间更早,燃弧率和电弧能更高。高转速下不稳定的接触可能提供了放电间隙,容易诱发电弧。一旦形成电弧,表面损伤机制从低转速时的机械损伤主导转变为机械损伤和电弧烧蚀并存。电弧放电导致实时电流剧烈波动,电弧烧蚀导致摩擦表面氧化严重,接触电阻上升。Using the FTM-CF100 rolling current-carrying friction tester,the effect of rotating speed on the friction performance and damage mechanism of pure copper rolling current-carrying contact pairs is investigated.The arc behaviors and the surface electric damage are emphasized.With the increase of rotating speed,the average current-carrying friction coefficient decreases gradually and is always higher than mechanical friction coefficient,and the real-time current is more prone to drastic fluctuations.At higher speed,the arc appears earlier,the arc rate and arc energy are higher.The unstable contact at high speed may provide discharge gaps,which is advantageous to arc generation.After the arc appearance,the surface damage mechanism changes from the dominant mechanical damage at low speed to the coexistence of mechanical damage and arc ablation.Arc discharge can lead to current fluctuation,serious oxidation and the increase of contact resistance.

关 键 词：滚动 载流摩擦 转速 电弧 

分 类 号：TH117[机械工程—机械设计及理论]