摘要
插拔磨损会引起电连接器接触件接触表面的微观形貌变化,降低其接触性能与可靠性。针对接触件的结构特点,设计了试验电路并进行了插拔试验。试验结果证明:在单次插拔过程中,插入力、分离力呈现类似“阶跃方波”变化特点,随着插拔次数的增加,插拔力值缓慢增大;300次插拔后,插拔力值基本稳定,但其波动明显增加;随着插拔次数的增加,接触电阻值缓慢增加,但波动范围逐渐增大,呈现出不稳定趋势;电连接器插孔和插针的主要磨损形式不同,插孔为犁削磨损,插针为粘着磨损。插拔磨损过程对电连接器的接触性能影响并不仅仅体现在接触电阻的提高,其所造成的各接触件接触电阻值在较大范围波动的现象,可能会导致在其他接触件可靠接触的同时,其中某一对接触件的接触电阻过高,为电连接器的可靠接触带来隐患。
Insertion-extraction and wear can cause microscopic topography changes in the contact surface of the electrical connector contacts,reducing its contact performance and reliability.According to the structural characteristics of the electrical connector contacts,the test circuit was designed and the insertion-extraction test was carried out.The test results show that:the insertion force and separation force are similar to the“step square wave”variation in the single insertion-extraction process;the insertion force value increases slowly as the number of insertion-extraction increases;the insertion force value is basically stable,but its fluctuation is obviously increased after 300 insertion-extractions;the contact resistance value increases slowly as the number of insertion-extractions increases,but the fluctuation range gradually increases,showing an unstable trend;the main wear form of the connector jacks and pins are different,the jack is worn for plowing,and the pin is adhesively worn.The influence of the insertion-extraction process on the contact performance of the electrical connectors is not only reflected in the increase of the contact resistance,but also the contact resistance of every electrical connector contacts is fluctuated over a wide range,which may result in the problem that the other electrical connector contacts are in reliable contact,the contact resistance of one of the pairs is too high.It brings hidden dangers to the reliable contact of the electrical connectors.
作者
骆燕燕
苏敬元
任永隆
Luo Yanyan;Su Jingyuan;Ren Yonglong(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China;School of Electrical Engineering,Hebei University of Technology,Tianjin 300130,China)
出处
《电测与仪表》
北大核心
2020年第17期8-13,共6页
Electrical Measurement & Instrumentation
基金
河北省自然科学基金项目(E2018202156)。
关键词
电连接器
磨损
插拔试验
接触电阻
electrical connector
wear
insertion-extraction test
contact resistance
