Research on Current-Carrying Wear Characteristics of Friction Pair in Pantograph Catenary System
To solve the serious wear problem of pantograph slide in electrified railway pantograph catenary system, lots of current-carrying wear experiments under different conditions were carried out with a self-developed sliding electrical contact testing machine. The experimental materials are immersed copper carbon slide and copper contact wire respectively. Relationships between wear rate of slide and contact pressure, contact current and sliding speed were analyzed. The F-test method was used to compare the influence degree of three factors on wear rate based on variance analysis table. The optimal nonlinear functions between wear rate and single influencing factor were obtained by curve fitting method. A mathematical model of the wear rate was established by the multi-variable nonlinear regression method. The conclusions have certain reference value to research of the current-carrying wear characteristics of friction pairs in pantograph catenary systems.