浸金属碳滑板/铜银合金接触线载流摩擦磨损性能的试验研究  

Experimental Study on Friction and Wear Behavior of Copper⁃Impregnated Metallized Carbon Strip/Cu-Ag Alloy Contact Wire with Electric Current

作　　者：钟传枝 许岩 陈光雄[1] ZHONG Chuanzhi;XU Yan;CHEN Guangxiong(Tribology Research Institute,Southwest Jiaotong University,Chengdu Sichuan 610031,China)

机构地区：[1]西南交通大学摩擦学研究所,四川成都610031

出　　处：《润滑与密封》2021年第11期34-39,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(51775461).

摘　　要：选取地铁刚性接触网中现役的浸金属碳滑板与铜银合金接触线为接触副,模拟地铁弓网的实际运行状况,在环-块式试验机上研究直流电流为200~400 A、法向载荷为15~40 N、滑动速度为40~120 km/h工况下浸金属碳滑板载流摩擦磨损性能。结果表明:摩擦因数随电流和滑动速度的增大而减小,随法向载荷的增大而增大;磨损量随电流和滑动速度的增大而增大,当电流较小时(如200 A),磨损量和法向载荷之间存在一个阈值,当电流较大时(如400 A),磨损量随法向载荷的增大而减小;滑板温度随电流的增大而增大,随法向载荷增大而减小,当电流较小时(如200 A),滑板温度随速度的增大而增大,当电流较大时(如400 A),滑板温度随速度的增大而减小;当电流为200~300 A时,其磨损机制主要为机械磨损,当电流为300~400 A时,其磨损机制主要为氧化磨损和电弧烧蚀。The friction and wear behaviors of copper⁃impregnated metallized carbon strip/Cu-Ag alloy contact wire with current were experimentally studied on a ring⁃block type tester under the condition of current from 200 A to 400 A,normal load from 15 N to 40 N and sliding speed from 40 km/h to 120 km/h.The results indicate that the friction coefficient de⁃creases with the increase of current and sliding speed,and increases with the increase of normal load.The wear loss of car⁃bon strips increases with the increase of current and sliding speed.When the current is small(such as 200 A),there is a threshold between the wear loss and normal load,when the current is large(such as 400 A),the wear loss decreases with the increase of normal load.The temperature of carbon strips increases with the increase of current,and decreases with increase of normal load.When the current is small(such as 200 A),the temperature of carbon strips increases with the increase of speed,when the current is large(such as 400 A),the temperature of carbon strips decreases with the increase of speed.When the current is between 200 A and 300 A,the mechanical wear is a main wear mechanism,when the current is between 300 A and 400 A,the oxidative wear and arc ablation are two dominant wear mechanisms.

关 键 词：载流摩擦 摩擦 磨损 温度 

分 类 号：TH117􀆰[机械工程—机械设计及理论]