Journal of Shandong University(Engineering Science) ›› 2020, Vol. 50 ›› Issue (6): 30-39.doi: 10.6040/j.issn.1672-3961.0.2020.127

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Mechanical characteristics for deep sea wet-mate electrical connectors

HAN Jiazhen1,2, WANG Yong1,2*, XIE Yudong1,2, WANG Qixian3, ZHANG Xinbiao1,2, GAO Wenbin4, LI Ronglan4, ZHANG Chuanjun4   

  1. 1. School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Key laboratory of High-Efficiency and Clean Mechanical Manufacture Ministry of Education(Shandong University), Jinan 250061, Shandong, China;
    3. Oceam College, Zhejiang University, Hangzhou 310058, Zhejiang, China;
    4. Shandong Longli Electronic Co., Ltd, Linyi 276017, Shandong, China
  • Published:2020-12-15

Abstract: A deep-sea and wet-mate electrical connector at 7 000 meters underwater was chosen as the research subject, aiming at obtaining the mechanical characteristics and dynamic sealing performance of the wet-mate connector under the condition of deep-sea double high pressure. The plug structure and pressure compensation technology of the connector were introduced and a calculation formula of the working volume of the pressure compensator was derived. Finite element models of plug's inner shell component and jack component's dynamic sealing were established by using the software Ansys Workbench, and the strength of the inner shell, pressure balance membrane and inner tank was calculated. The stress distribution and deformation of the membrane under the action of instantaneous pressure difference caused by the connector's wet-mate operation between the inside and outside of the balance membrane were analyzed. The effects of the seal component's radial compression, sealing contact surface's friction coefficient and wet-mate speed on dynamic sealing performance during the wet-mate operation were discussed. The results showed that when the plug was inserted, the stress on the outer surface of the balance membrane was almost unchanged, and its deformation was decreased; when the plug was pulled out, the stress and deformation on the outer surface of the balance membrane were gradually increased. The contact pressure between seal components was obviously affected by the interference fit of the sealing contact surface. Increasing the interference fit could significantly improve the contact pressure and sealing performance of the dynamic sealing area, but also exacerbate the possibility of seal component's failure. The sealing contact surface's friction coefficient and wet-mate speed had little influence on the contact pressure.

Key words: deep sea wet-mate electrical connector, mechanical characteristic, pressure compensation technology, finite element analysis, dynamic seal, contact pressure

CLC Number: 

  • TH137
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