电流强度对QBe2.0电刷丝摩擦磨损性能的影响  

Effect of Current on Friction and Wear Properties of QBe2.0 Brush Wire

作　　者：王成林 张燕燕 陈鹏飞 周涛涛 宋晨飞[1] 杜三明[1] 张永振[1] WANG Chenglin;ZHANG Yanyan;CHEN Pengfei;ZHOU Taotao;SONG Chenfei;DU Sanming;ZHANG Yongzhen(National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Henan Luoyang 471023,China;Space Structure and Mechanism Technology Laboratory of China Aerospace Science and Technology Group Co Ltd,Shanghai 201108,China)

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,河南洛阳471023 [2]中国航天科技集团有限公司空间结构与机构技术实验室,上海201108

出　　处：《摩擦学学报（中英文）》2024年第10期1405-1416,共12页Tribology

基　　金：中国航天科技集团有限公司空间结构与机构技术实验室开放课题基金(YY-F805202211013);河南省重点研发与推广专项(科技攻关)项目(222102220103);河南省高等学校重点科研项目(22A460015);国家自然科学基金项目(92266205)资助。

摘　　要：本文中研究了QBe2.0电刷丝/滑环摩擦副在不同电流强度条件下的载流摩擦学性能.研究结果显示:随着电流强度的增加,摩擦副平均摩擦系数增加,接触电阻下降,电刷丝磨损表面温度升高,平均硬度降低,电刷丝磨损表面材料软化,磨损面积增大.在摩擦热、电阻热和电弧热的共同作用下,刷丝磨损表面氧化磨损加剧,磨损量增加,粗糙度变大. SEM (扫描电镜)分析显示,磨屑表面出现电弧烧蚀引起的孔洞和熔融喷溅现象,电刷丝磨损面上观察到熔融产生的氧化物颗粒和龟裂现象.随着电流强度的增加,虽然摩擦副摩擦磨损性能下降,但是其接触稳定性和导电性能得到改善.The rotating conductive joint is a device that connects the fixed part and the moving part,which is used to transmit the current and signal.The traditional conductive slip ring transmits power and signal between the brush and the slip ring,which is widely used in aerospace and navigation fields,military fields,new energy resources and medical fields.In some working conditions,the slip ring has the advantages of better conductivity,better wear resistance,smaller friction coefficient,lower electrical noise and stronger resistance to arc erosion.Therefore,conductive rings and brushes are generally made of gold,silver,silver copper,platinum-iridium and so on.Although these precious metal materials have better wear resistance and smaller friction coefficient,the cost of gold and silver are much more expensive.Therefore,precious metals are generally used in high-end industries.Beryllium bronze is a kind of alloy with better comprehensive properties,better electrical conductivity.Besides,it is cheaper compared with precious metals.In the civil field,it is widely used in all walks of life.The current-carrying sliding between friction couples has important impacts on the tribological properties of conductive slip rings.Scholars and scientific research institutions have carried out a lot of work on the tribological properties and damage mechanism of conductive slip rings.The slip ring structure,material,brush wire coating,environment ware studied.the current deteriorated the contact conditions of ring and brush pairs.The wear was more complicated than that of ordinary friction pairs.At present,the damage mechanism of the brush wire and conductive slip ring V-groove/cantilever beam with current was still not clear,so it was necessary to carry out relevant research.This paper studied the influence of different current on the tribological properties and electrical contact properties of brush wire.By optical microscopy,scanning electron microscopy,white light interference three dimensional profilometer,energy dispersive spectr

关 键 词：载流摩擦 电刷丝 磨损 氧化 

分 类 号：TH117.1[机械工程—机械设计及理论]