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Sealing performance of deep-sea connector O-ring based on structural deformation theory
Published:2024-08-02 author:GU Leye, GAN Yi, ZHANG Pengju. Browse: 616 Check PDF documents
Sealing performance of deep-sea connector O-ring based on 
structural deformation theory


GU Leye1, GAN Yi1, ZHANG Pengju2,3


(1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2.Deepsea 

Topend Equipment System Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, China; 

3.Shanghai Linxi Intelligent Technology Co., Ltd., Shanghai 200131, China)


Abstract:  The deep-sea connector is a signal transmission equipment that ensures the normal operation of marine equipment, and the normal operation of the deep-sea connector largely depends on the sealing performance of the O-ring. Therefore, the problem that the deep-sea high-pressure environment causing O-ring deformation and seriously affecting the sealing performance of O-ring was analyzed. Firstly, based on the theory of structural deformation, the influence of environmental pressure on the deformation of the seal structure and the compression amount of the O-ring was theoretically analyzed. Then a nonlinear dynamic seal model of the O-ring was established by the finite element method, the influence of model grid division on the accuracy of the simulation results was analyzed and studied, and the relationship curve between the structural deformation and environmental pressure was analyzed. Finally, the effects of material properties, environmental pressure and sealing structure size on the performance of dynamic seals were studied and analyzed. The research results show that when the actual value of the grid is 47 745, and the measured value is 21 685, 37 934 and 50 707, the error of the simulation results is less than 2%. The curve trends of the deformation of seal structure and the compression of O-ring are basically consistent with the theoretical values. The change of material properties and environmental pressure will affect the dynamic sealing performance. In the sealing structure size, increasing the groove fillet radius can enhance the dynamic sealing performance of the O-ring. The research results can provide reference and theoretical support for the design and optimization of O-ring under deep-sea high-pressure environment.

Key words:  marine equipment; signal transmission equipment; O-ring compression; dynamic sealing performance; material properties; environmental pressure; sealing structure size; groove fillet radius
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