Surface Pattern Pair Based on Archard Wear Theory Study on Current-Carrying Wear Characteristics of Carbon Brush/Collector Ring

By establishing a transient coupling finite element model of carbon brush/collector ring and combining with Archard wear model, numerical simulation of current-carrying wear behavior was carried out to study the influence of surface pattern on current-carrying wear performance of carbon brush/collector ring, and the simulation results were verified by experimental method.

The experimental results showed that the wear peak value of carbon brush was mainly distributed around the pattern and the edge area under current load condition. When the surface pattern ratio was 25%, the heat dissipation performance and the matrix strength were coordinated and optimized, and the wear volume was significantly reduced. At low current density, non-uniform wear was aggravated due to insufficient contact pressure, while at high current density, material spalling was aggravated due to sharp rise in local temperature.