摘要
研究目的:定位器是接触网的关键零部件,一旦发生故障,直接影响弓网受流的可靠性和安全性。通过研究定位器失效对接触网振动响应的影响以进行定位器故障诊断。首先,通过机理分析区分定位器线夹脱落和钩环脱落两类故障;其次,建立接触网定位器故障仿真模型并搭建接触网全参数故障仿真系统,获取接触网定位器故障时的接触网振动响应参数;最后,通过分析定位器失效时定位点垂直与水平方向的加速度统计数据,提取振动加速度响应时间、振动频率来识别故障特征。研究结论:(1)定位器故障时的振动模式有较大变化且水平加速度大幅增加;(2)故障点处加速度幅值主频前移,相应峰值降低,相位角持续降低;(3)故障点水平方向加速度变化剧烈,接触网振动响应明显失常,直接影响弓网受流乃至列车正常运行;(4)在实际工程中,通过本文方法可实现对定位器故障的快速定位和诊断,确保弓网受流的稳定性。
Research purposes: Steady arm is a key component of OCS. Once a fault occurs, it will directly affect the safety of pantograph catenary current collection. It’s necessary to study the influence of steady arm failure on the vibration response of OCS in order to implement fault diagnosis of steady arm. Firstly, through mechanism analysis, two kinds of faults are obtained, namely, wire clamp falling off and shackle falling off. Secondly, based on the fault simulation model of catenary steady arm, a catenary full-parameter fault simulation system is built to obtain the catenary vibration response parameters when the catenary steady arm fails. Finally, by analyzing the acceleration statistical data in the vertical and horizontal directions of the positioning point when the steady arm fails, the vibration acceleration response time and vibration frequency are extracted to identify the fault characteristics. Research conclusions:(1) Vibration mode of the failed steady arm changes obviously and the horizontal acceleration increases dramatically.(2) The main frequency of the acceleration amplitude at the fault point moves forward, the corresponding peak decreases, and the phase angle continues to decrease.(3) The acceleration in horizontal direction of the fault point changes sharply, and the vibration response of the catenary is obviously abnormal, which will directly affect the normal operation of the train.(4) In practical engineering, this method can position and diagnose the fault of steady arm in time for the stable and reliable pantograph catenary current collection.
作者
田升平
TIAN Shengping(China Railway First Survey and Design Institute Group Co.Ltd,Xi'an,Shaanxi 710043,China)
出处
《铁道工程学报》
EI
北大核心
2022年第10期71-76,共6页
Journal of Railway Engineering Society
关键词
接触网
定位器
故障特征
振动响应
OCS
steady arm
fault characteristics
vibration response
