振动对电连接器接触性能退化的影响

发布时间：2018-03-09 18:21

本文选题：电连接器　切入点：接触压力　出处：《航空学报》2017年08期 　论文类型：期刊论文

【摘要】：长期振动作用下,电连接器插孔易出现应力松弛现象,引起接触性能的退化。针对接触件的结构特点,提出了一种接触压力监测方法和接触性能退化试验方案,设计了试验电路并进行了试验。试验结果表明:(1)接触压力波动程度受振动频率与加速度共同影响,高频振动下,接触压力值波动程度约为低频振动下的3~7倍;但随着振动加速度的增大,低频振动下接触压力波动程度的增幅更为明显;(2)随着振动次数的增加,接触压力逐渐减小;振幅越大,接触压力的降幅越明显;试验后插孔槽宽的变化规律与之吻合,且振幅越大,振动累积效应的差异性越明显;但接触电阻无明显的变化趋势。因此,振动引发的插孔应力松弛现象和电连接器接触性能退化的演变极其缓慢,但振动影响的差异性可能会导致突发性偶然失效现象。
[Abstract]:Under the action of long-term vibration, stress relaxation is easy to appear in the socket of electrical connector, which leads to the degradation of contact performance. According to the structural characteristics of the contact, a method for monitoring contact pressure and a scheme for testing the degradation of contact performance are proposed. The experimental circuit is designed and tested. The experimental results show that the fluctuation degree of contact pressure is affected by both vibration frequency and acceleration, and the fluctuation degree of contact pressure at high frequency vibration is about 3 ~ 7 times as high as that under low frequency vibration. However, with the increase of vibration acceleration, the increase of contact pressure fluctuation degree is more obvious with the increase of vibration times, the contact pressure decreases gradually with the increase of vibration frequency, the larger the amplitude, the more obvious the decrease of contact pressure. After the test, the variation of slot width is consistent with it, and the larger the amplitude, the more obvious the difference of vibration accumulation effect, but the contact resistance has no obvious change trend. The vibration induced stress relaxation of the Jack and the degradation of the contact performance of the electrical connectors evolve very slowly, but the difference of vibration effects may lead to sudden accidental failure.
【作者单位】：河北工业大学电气工程学院;河北省沧州渤海新区供电公司;中国能源建设集团天津电力设计院有限公司;
【基金】：国家自然科学基金(51107028) 河北省电工产品可靠性技术2011协同创新中心项目~~
【分类号】：TM503.5

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