有无电流工况下钢铝复合轨/受电靴的摩擦磨损特性

Friction and Wear of Steel Aluminum Composite Conductor Rail/Collector Shoe with and without Direct Current

利用改进设计的销盘摩擦磨损试验机,研究了用于地铁供电的钢铝复合轨与受电靴在有无电工况下的滑动摩擦磨损性能,对比了磨损量与摩擦因数的变化,观察和分析了微观磨损形貌,分析了其摩擦磨损机制。试验表明:电流对摩擦副的干摩擦滑动行为具有显著的影响,随着电流的增加,钢铝复合轨和受电靴的磨损质量增加,摩擦因数减小,摩擦表面出现粘着磨损、电弧烧蚀、磨粒磨损、疲劳剥落特性。

Friction and wear behaviors of steel aluminum composite conductor rail against current collector with and without direct current under dry sliding condition were examined on a modified pin-on-disc tester. Wear mass loss and friction coefficient were compared and the wear surface morphologies of conductor rail were observed with optical microscope. Results show that within the studied range of electrical currents, normal pressures and sliding speeds, tribological behaviors of the pair greatly depend on the electric current. Wear volume loss increased and friction coefficient decrease with increasing electric current. The rail sliding against the current collector with direct current is characterized by adhesive wear, electric arc ablation, abrasive wear and spalling fatigue.