Simulation on the Contact Temperature of Sliding Friction Pair Under Rain Condition

The pantograph slide contact temperature and wear of contact surface are greatly affected the electric locomotive working condition under the rain. In this paper, a sliding electrical contact roughness surface model with high speed and different current under the rain is established, which effectiveness is verified by the high performance sliding electrical contact experiment system. Then, the correlation between contact temperature, average roughness slope and average roughness height under the rain is researched via the simulation model. The results show that the impact of rainfall on contact temperature is more pronounced than that of contact current. As the average roughness height increases in various rainfall scenarios, the contact temperature initially undergoes a decrease, followed by an increase, and ultimately returns to a decrease. The average roughness slope is negatively correlated with the contact temperature of slide under different rainfall. The above conclusion has great significance for effectively reducing t the temperature experienced by the pantograph slide at the contact interface within the sliding friction pair.