Analysis on the Performance of New Mountain Gear Rail Train Brake

Objective The maximum slope of the mountain gear rail line can reach 250‰. As the sliding force generated by the component of the gravity is much greater than the maximum friction force between wheel and rail, relying solely on the conventional wheel and rail braking system can not restrain the vehicle sliding when the vehicle runs on the maximum slope of the mountain gear rail line. Special gear rail braking device, which uses the gear rack engagement mode to brake the gear rail wheel directly, is needed to break the friction limit between the steel wheel and rail and provide greater braking force for the mountain gear rail vehicle running on the big slope. Analysis of the new brake performance is helpful to ensure the safety of the gear rail vehicle operation. Method The characteristics of the current special gear rail braking system for gear rail train in China and abroad are analyzed, and the advantages and disadvantages of the existing gear rail braking devices are summarized. According to the space and interface dimensions of the gear rail bogie, combined with the characteristics of the aircraft brake, a special brake for multi-friction disc gear rail on super large slope is designed, and its composition and performance are introduced. Theoretical calculation and finite element simulation are used to analyze the performance and component strength of the new brake, as well as its temperature changes under three worst working conditions. Result & Conclusion The new brake has good braking performance, and its highest temperature is lower than the bearing limit of the brake material in the worst working conditions. It can meet the braking requirements of the gear rail train under different braking conditions at maximum gradient (250‰).