基于Ansys的不同截面密封圈密封性能仿真分析

目的对"凸"形、矩形和"Y"形截面密封圈的密封性能进行对比分析,为端面静密封形式的密封圈选型和结构设计提供参考。方法基于Ansys的大变形接触有限元分析,对3种不同截面密封圈进行应力和接触压力仿真分析,并对结果进行比较。结果 "凸"形截面密封圈在压缩过程中最大应力和最大接触压力变化均匀,最大接触压力面较宽;矩形截面密封圈最大应力变化均匀,最大接触压力在密封圈压缩量超过18%后呈现陡增现象;"Y"形截面密封圈最大应力和最大接触压力在密封圈压缩量超过18%后均呈现陡增现象,而且最大接触压力面狭窄。结论对于特定密封圈槽的端面静密封形式,"凸"形截面密封圈密封性能最优。

Simulation and Analysis of Sealing Performance of Different Cross-section Sealing Ring Based on Ansys

The work aims to provide reference for the selection and structural design of the sealing ring with end face statically sealed by comparatively analyzing the sealing performance of sealing rings with the convex, rectangle and Y-shaped cross sections, respectively. Simulation analysis of the stress and contact pressure of 3 kinds of sealing rings with different cross sections were carried out and the results were compared through the finite element analysis on the contact with large deformation based on Ansys. In the compression process of sealing rings with convex cross section, the maximum stress and the maximum contact pressure changed uniformly, and the maximum contact pressure surface was wide. For the sealing rings with rectangle cross section, the maximum stress changed uniformly, and the maximum contact pressure was steeply increased when the compressibility of sealing ring was over 18%. After the compressibility was over 18%, the maximum stress and the maximum contact pressure of sealing ring with Y-shaped cross section were steeply increased, and the maximum contact pressure surface was narrow. The sealing performance of sealing ring with the convex cross section used in the static sealing of end surface of a specific seal groove is optimal.