High-performance frition and wear prototyping based on wear sleady-state

Pertaining to an electrical railroad,the electric locomotive power is generated through the sliding contact between pantograph contact strips and networked contact wires.The frictional contact states directly affect the operational speed adn traction force.Actually,a specific frictional or tribological pair is generated in terms of mechanical-electricl coupling.In particular,the wear process is associated with a physical-chemical reaction.From experimental results,it is found that a relatively low wear value,along with a relatively stable wear rate,occurs under normal conditions.At this stage,a bright surface membrane,which is formed in a steady state,impacts significantly on the performance and operational life-cycle of frictional pair.In order to test the carrier-current wear between pantograph contact strips and networked contact wires,a high-performance friction-wear prototyping is developed by analyzing the properties of steady-state wear.Accordingly,it is observed that this prototyping possesses such advantages as wide-range adjustment,high measurement precision and good functionality.In addition,this approach can be applied for sliding electric contact experiments between electric brush and motor slip-ring.