Research on the Matching Relationship between Backflow Device and Special Rail of Urban Rail Transit Vehicles

Abstract

Objective The stray current generated during the operation of urban rail transit vehicles with rail backflow method will cause electrical corrosion to nearby metal objects, while the special rail return mode can solve such problems. It is necessary to comprehensively analyze the matching relationship between the backflow device of urban rail transit vehicles and the special rail. Method Based on the structural parameters of bogies, backflow devices, running rails and special rails of urban rail transit vehicles, as well as their suspension parameters and gauges, a vertical and horizontal dimensional chain analysis method is innovatively established by analyzing the structural matching characteristics between the backflow device and the special rail. The spatial size matching relationship between the vehicle backflow device and the special rail of an urban rail transit vehicle under six working conditions is checked. The vehicle dynamics simulation model with backflow device is established by SIMPACK simulation software. Whether the vertical contact pressure between vehicle backflow device and special rail is within a reasonable range during train operation is analyzed under four working conditions. Result & Conclusion The checking of the spatial size matching relationship between the vehicle backflow device and the special rail shows that partial structure of the backflow device needs to be adjusted. Simulation analysis verifies that the vertical contact pressure between the vehicle backflow device and the special rail is within a reasonable range.

Keywords

• urban rail transit
• vehicle backflow device
• special rail
• matching relationship