电连接器微动磨损的超声识别与性能退化模型  

Ultrasonic Recognition and Performance Degradation Model of Electrical Connector Fretting Wear

作　　者：骆燕燕[1] 王永鹏 孙自航 梁弘 LUO Yanyan;WANG Yongpeng;SUN Zihang;LIANG Hong(State Key Laboratory for Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin,300130;State Grid Jibei Electric Power Company Power Supply Company,Tangshan,Hebei,063200;State Grid Tianjin Electric Power Company Maintenance Company,Tianjin,300232)

机构地区：[1]河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300130 [2]国网冀北电力公司供电公司,唐山063200 [3]国网天津市电力公司检修公司,天津300232

出　　处：《中国机械工程》2023年第2期164-171,共8页China Mechanical Engineering

基　　金：河北省自然科学基金(E2018202156)。

摘　　要：针对振动环境下电连接器易产生微动磨损而接触性能降低这一问题,采用超声检测方法监测微动磨损过程中电连接器接触件间磨屑的特征值,研究了不同振动条件下接触件的磨损程度及接触性能的退化规律。结果表明,振动频率、振动加速度和振动次数对接触面磨屑的堆积和接触电阻的波动都有正向累积效应;电连接器轴向振动时,磨屑累积效应最为明显。接触电阻和磨屑特征值总量在高振频及加速度下呈现极高的相关性。以磨屑特征值构建的麻雀搜索算法优化BP神经网络性能退化模型的平均绝对误差小于5%。Aiming at the problems that electrical connectors reducing contact performance by fretting wear in vibration environments,an ultrasonic testing method was used to monitor the characteristic values of wear debris between electrical connector contacts during fretting wear,and to study the wear degree of contacts under different vibration conditions and the degradation law of contact performance.The results show that the vibration frequency,vibration acceleration,and fretting times have positive cumulative effects on the debris accumulation and contact resistance fluctuation.When the electrical connector vibrates axially,the debris accumulation effectiveness is the most obvious.The contact resistance and the total amount of wear debris characteristic values show a very high correlation under high vibration frequency and acceleration.The average absolute errors of SSA-BP performance degradation model are less than 5%based on the wear debris characteristic values.

关 键 词：电连接器 微动磨损 磨屑 性能退化 超声无损检测 

分 类 号：TM501[电气工程—电器]