广州地铁9号线车辆受电弓碳滑板异常磨耗原因分析及改进措施

Cause Analysis and Optimization Measures of Vehicle Pantograph Carbon Strip Abnormal Wear on Guangzhou Metro Line 9

目的:针对广州地铁9号线开通运营初期受电弓碳滑板出现较严重拉弧、异常磨耗及崩口等情况,提出了改进措施,以减小对列车运行的影响。方法:从车辆状态和接触网状态两方面排除了碳滑板材质不良及列车振动引起碳滑板异常磨耗的可能性。在此基础上查找出受电弓跳弓点位置,发现受电弓经过膨胀元件时拉弧严重。通过对MVB(多功能车辆总线)速度数据、正线信号对标点公里标及车体数据进行分析,对正线接触网膨胀元件进行了精确定位,发现受电弓在经过膨胀元件时会产生较大的振动,受电弓在膨胀元件处的弓网匹配性较差。进一步与国内同行就碳滑板异常磨耗问题进行交流,以确定受电弓碳滑板异常磨耗原因。结果及结论:膨胀元件结构问题是导致受电弓碳滑板异常磨耗的主要原因。改进措施为:优化膨胀元件辅助线过渡段长度和过渡形式,优化膨胀接头布置,优化列车牵引软件。采取上述改进措施后,弓网关系明显改善,碳滑板的使用寿命大为延长,牵引故障率明显下降,列车的维修成本大大降低。

Objective:Causes for serious arc pulling,abnormal wear and collapse of pantograph carbon strip at Guangzhou Metro Line 9 operation early stage need to be identified,so that improvement measures can be proposed and train operation can be less affected.Method:The possibility of poor material and train vibration inducing carbon strip abnormal wear is excluded from the aspects of vehicle state and catenary state.On this basis,the location of pantograph detachment points is identified,and it is discovered that arc pulling is serious when pantograph passes expansion element.By analyzing the speed data of MVB(multi-function vehicle bus),the main line signal mileage mark and carbody data,the expansion element of the main line catenary is accurately located,and it is found that the pantograph will produce great vibration when it passes through the expansion element and the pantograph-catenary matching is poor at this point.Furthermore,the topic of carbon strip abnormal wear is communicated with peers in China and the reason of pantograph carbon strip abnormal wear is concluded.Result&Conclusion:Expansion element structure problem is the main cause of pantograph carbon strip abnormal wear.Optimization measures include optimizing the transition segment length and transition mode of expansion element auxiliary line,optimizing expansion joint layout,and optimizing train traction software.By adopting the above measures,pantograph-catenary relation is obviously improved,manifested as a significant extension of carbon strip service life,a great decrease in traction failure rate and train maintenance costs.