提高120阀的安定性裕量研究

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中图分类号：U270.35 文献标志码：B doi：10.20213/j.cnki.tdcl.2025.01.022

文章编号：1002-7602（2025）01-0172-05

Abstract： In response to the unexpected emergency failure of freight trains in China，this paper proposes that the stability margin of 12O valves should be improved.Based on the change in exhaust capacity of locomotive brakes，this paper analyzes the change in the requirements of stability and emergency sensitivity of control valves in China's single-vehicle test standards and the evolution of AAR single-vehicle test methods.It is found that improving the stability of the control valve is an effective measure to prevent accidental emergencies. The change of single valve test standard of 12O valve is analyzed，and based on the emergency exhaust capacityof locomotives and the correlation requirements of single-valve test and single-vehicle test standards，a test standard scheme to improve the stability marginof 12O valves is put forward.The test results show that after improving the stability of 12O valves，the emergency braking wave speed is about 245～255m/s ，and it can reach 280～290m/s by further improving the service braking wave speed，which shows that the scheme of improving the stability of 12O valves is feasible.

Key words：railway freight car;l2O valve；unexpected emergency；stability;margin

1背景

用制动的至少3倍以上，列车在正常运行时发生意外紧急制动，将对车辆、线路造成危害，严重影响列车的运行安全与运行秩序。（剩余4178字）