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为考察弓网系统在高速大电流条件下的载流磨损现象,利用高速滑动电接触试验机开展浸金属碳滑板与铜导线的对磨实验,对不同速度、不同接触压力和接触电流下滑板的载流磨损行为进行研究.研究结果表明:在载流条件下,随着速度的增加,滑板与导线的离线率增加,离线电弧和摩擦热也增加,而滑板的磨耗量却呈下降趋势.利用SSX-550型扫描电子显微镜对滑板的磨损形貌进行扫描分析,发现滑板表面呈现出特有的磨损形态,随着速度的增加,滑板表面形态相对比较光滑,磨损较少,这是一种稳定的磨损状态.滑板表面在高速运行时形成的稳定的载流磨损形态可以减小弓网系统的磨耗,有助于弓网系统的稳定运行.
In order to investigate the phenomenon of current-carrying wear of bow-net system under high-speed and high-current conditions, the high-speed sliding electrical contact testing machine was used to carry out the wear test of carbon-coated carbon steel and copper wire. The effects of different speed, contact pressure and contact current The results show that with the increase of velocity, the off-line rate of slide and wire increases, the off-line arc and frictional heat increase while the wear of slide decreases. Scanning electron microscopy (SSX-550) scanning of the slide showed that the surface of the slide showed a unique wear pattern. With the increase of velocity, the slide surface morphology is relatively smooth and wear less, which is a stable Wear condition.The stable current-carrying wear pattern formed on the skateboard surface at high speed can reduce the wear of the archwire system and contribute to the stable operation of archwire system.