摘要
在CETRUMT-2摩擦磨损实验机上,用自行设计的夹具,研究了加载系统支撑刚度对地铁第三轨与受电靴摩擦副之间的载流摩擦磨损特性的影响,测量了法向力随时间的变化、摩擦因数以及受电靴的磨损质量损失,观察了试样磨损表面,分析了加载系统的支撑刚度与载流摩擦磨损特性之间的关系。结果表明:不同支撑刚度条件下,随着法向载荷降低,载荷振幅均增大,电弧烧蚀导致材料损失增加;弹性支撑改变了加载系统的振动特性,使得载荷振幅和磨损质量损失总体上较刚性加载时小;为保证第三轨系统良好的受流,应选择合适的加载范围和一定刚度的加载系统,降低电弧烧蚀带来的材料损失,延长摩擦副的使用寿命。
The effects of loading system bracing stiffness on the tribological characteristics of third rail/collector shoe under electrical current were studied by the modified jig of CETR UMT-2 tester. Normal forces changing with time, friction coefficients, and wear mass losses of collector shoe specimens were measured, morphology of worn surfaces were observed, and the relation between bracing stiffness and property of friction and wear with electric current was analyzed. The results show that the vibration amplitude of normal force and wear mass loss induced by arc erosion both increase with the decreasing of normal force under different bracing stiffness ; elastic bracing system changes the vibration characteristics of loading system, which makes vibration amplitude of normal force and the wear mass losses less then those of in rigid bracing system. For better power feeding of third rail system, choosing appropriate range of normal force and rational stiffness of loading system is necessary to decrease the wear mass loss induced by arc erosion, and to prolong wear life of frictional pair.
出处
《润滑与密封》
CAS
CSCD
北大核心
2009年第10期14-17,44,共5页
Lubrication Engineering
基金
四川省教育厅自然科学青年基金项目(07ZB084)
国家自然科学基金资助项目(50521503)
西华大学人才培养与引进项目
关键词
摩擦磨损
刚度
电流
第三轨
受电靴
friction and wear
stiffness
electrical current
third rail
collector shoe
