北京地铁S1线磁浮列车制动不缓解原因分析及改进措施

Cause Analysis and Improvement Measures for Maglev Train Brake Release Failure in Beijing Subway Line S1

[目的]北京地铁S1线磁浮列车在运营期间发生了列车制动不缓解故障,对该线的正常运营产生了一定的影响。为此,需要找出该故障的确切原因,并提出改进措施。[方法]简述了北京地铁S1线列车的制动控制系统工作原理。利用鱼骨图分析法,梳理出引发该线列车制动不缓解的8项主要原因,并列出了各项原因的诱发因素。结合列车故障的实际情况,进一步梳理出该线列车制动不缓解故障的原因集合。使用排查法,确定了该线列车制动不缓解的根本原因。对电磁阀本身特性进行分析,采取了相应的改进措施。[结果及结论]该线列车PBCU(气动制动控制单元)中EP(充排气电磁阀)模块发生电磁阀卡滞,是导致列车制动不缓解的根本原因。将原有的美国MAC电磁阀门公司生产的平衡式电磁阀替换为德国NASS Magnet公司生产的截止式电磁阀后,有效解决了该线列车的制动不缓解故障。

[Objective]The maglev train of Beijing Subway Line S1 had a brake release failure during operation,impacting line normal operation.Therefore,it is necessary to find out the exact cause of the fault and put forward improvement measures.[Method]The working principle of the train brake control system of Beijing Subway Line S1 is briefly described.By using fishbone diagram analysis method,eight main causes of train brake release failure are identified,and the triggers of each cause are listed.Considering the actual situation of train fault,the cause set of train brake release on this line is further sorted out,and the root cause of train breaking failure on this line is determined using investigation method.The characteristics of solenoid valve are analyzed and corresponding improvement measures are taken.[Result&Conclusion]The solenoid valve stuck in EP(electro-pneumatic solenoid valve)module of train PBCU(pneumatic brake control unit)on this line is the root cause for train brake release failure.After replacing the balanced solenoid valve produced by MAC Valves,Inc.in the United States with the stop solenoid valve produced by German NASS Magnet GmbH,the train brake release failure on this line is effectively tackled.