长期贮存航天电连接器尘土污染的研究

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摘要针对长期贮存后的航天电连接器进行尘土污染对连接器电接触可靠性影响的研究,通过对长期贮存连接器的接触电阻、分离力检测和连接器内部及电接触表面尘土颗粒成分、分布密度、颗粒度的微观检测统计分析,发现连接器接触电阻随贮存时间增加而增加,不仅与分离力降低有关而且与尘土污染相关。尘土颗粒不仅在连接器的生产、装配、贮存等过程中进入连接器内部,而且在触点电镀过程中就沉积在镀层内。长期贮存环境中,尘土污染结合触点弹性材料的应力松弛、大气腐蚀等作用对连接器的电接触特性产生了综合影响。

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	周怡琳
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	李方

关键词 ：长期贮存, 尘土污染, 连接器, 电接触

Abstract：The effect of dust contamination on the electrical contact reliability of the aerospace electrical connectors after long term storage is investigated. The contact resistance and the separating force between the contacts formed by a pin and a socket in the connectors are measured. The element compositions, distribution density and size of dust particles inside the connectors and on the contact surfaces are also detected by scanning electronic microscope and X-ray energy dispersive spectroscopy. It is found that the contact resistance increases with the storage time, which is related to both the reduction of separating force and dust contamination. The dust particles can not only possibly enter the connector shells during the manufacture, assembly and storage periods, but also deposit on the contacts during the electroplating process. In the long-term stored environment, the dust contaminants combine the stress relaxation of spring materials of contacts and atmospheric corrosion to degrade the electrical contact performance of the connectors.

Key words： Long-term storage dust contamination connector electrical contacts

收稿日期: 2013-06-09 出版日期: 2014-08-05

PACS:

V442

基金资助:中央高校基本科研业务资助项目（2012RC0501）

作者简介: 周怡琳女,1972年生,副教授,硕士生导师,研究方向为电接触理论及电连接可靠性。王鹏男,1987年生,博士研究生,研究方向为电连接可靠性及连接器仿真建模。

引用本文:

周怡琳, 王鹏, 葛世超, 李方. 长期贮存航天电连接器尘土污染的研究[J]. 电工技术学报, 2014, 29(7): 269-276. Zhou Yilin, Wang Peng, Ge Shichao, Li Fang. Investigation on Dust Contamination of Aerospace Electrical Connector after Long-Term Storage. Transactions of China Electrotechnical Society, 2014, 29(7): 269-276.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I7/269

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