深海高压环境下组合密封结构性能分析

Performance Analysis of Combined Seal Structure in Deep Sea High Pressure Environment

以深海高压环境下的组合密封结构为对象,基于ABAQUS有限元分析软件建立组合密封结构非线性轴对称有限元模型,分析深海高压环境对组合密封结构密封性能的影响,探明组合密封结构在深海高压环境下几何变形情况以及密封界面上接触应力的分布规律.结果表明：对于滑环槽型为矩形截面的组合密封结构,所受的最大应力主要集中在滑环的右上端部和左下端部,且接触压力分布较为均匀,有利于提高组合密封结构的密封性能.同时,组合密封结构中O形橡胶密封圈和滑环所受的最大Von Mises应力随着海水深度的增大而逐渐增大,研究结果为深海高压环境下组合密封结构几何参数的选择与优化设计提供理论指导与技术支撑.

The combined seal structure under the deep sea high pressure environment was taken as an object to research, the nonlinear axisymmetric finite element model of the combined seal structure was established based on the ABAQUS finite element analysis software. The influence of the deep sea high pressure environment on the sealing performance of the composite sealing structure was analyzed. The combined seal structure geometrical deformation and the distribution of contact stress on sealing interface under the high pressure environment was revealed. The results showed that for the combined seal structure of rectangular sections, the maximum stress is mainly concentrated in the upper right and lower left end of the slip ring, and the contact pressure distribution is more uniform, which is helpful to improve the combined seal structure performance. At the same time, the maximum Von Mises stress of the O-ring and the slip ring in the combined seal structure increase with the depth of the seawater, and the result provide theoretical guidance and technical support for the geometrical parameters selection and optimization of the combined seal structure under the deep sea high pressure environment.