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在CETR UMT-2摩擦磨损试验机上,用自行设计的夹具,研究了支撑刚度对钢铝复合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曲线与受电靴的磨损质量和弹簧在加、卸载过程中的变形能,分析了变形能与载流摩擦磨损特性之间的关系。分析结果表明:随着载荷的降低,载荷振幅均增大;弹性支撑时的载荷振幅和磨损质量总体上较刚性支撑的小;弹簧的摩擦耗能与变形能的比值越大,吸振能力越强,载荷振幅越小,载流磨损质量越低。可见,弹性支撑能降低载荷的振幅,保证良好的受流,选择合适的加载范围和一定刚度的弹簧支撑能有效地降低电弧烧蚀带来的材料损失,延长摩擦副的使用寿命。
On the CETR UMT-2 friction and wear tester, the influence of support stiffness on the friction and wear properties of current-carrying friction between the steel-aluminum composite rail and the receiving shoe was studied with a self-designed fixture. The normal force was measured with time The relationship between the deformation energy and the load-bearing friction and wear characteristics was analyzed. The results show that the load amplitude increases with the decrease of load, and the load amplitude and the wear quality of the elastic support are generally smaller than that of the rigid support. The larger the ratio of the spring friction energy to the deformation energy, the stronger the vibration absorption capacity , The smaller the load amplitude, the lower the current carrying wear. It can be seen that the elastic support can reduce the amplitude of the load and ensure a good flow. Selecting a suitable load range and a certain stiffness of the spring support can effectively reduce the material loss caused by arc ablation and prolong the service life of the friction pair.