表面缺陷对硅橡胶密封性能的影响规律研究

采用有限元方法研究金属表面凸起缺陷对硅橡胶密封性能的影响规律。基于ABAQUS软件,建立密封接触过程有限元模型。重点分析表面凸起的高度、半径和位置对密封性能的影响。结果表明:表面凸起缺陷对密封性能影响显著;高度和位置对接触压力和接触面积影响较大,凸起的高度越大、距离接触压力的峰值位置越近时,越容易发生泄漏;而凸起半径对密封性能的影响相对较小。

Effect of Surface Defects on Sealing Performanceof Silicone Rubber

Silicone rubber seals are widely used in the aerospace field, and the surface defects of the sealing surface have important influence on the sealing performance. In this paper, finite element analysis method is used to study the effect of surface defects on sealing performance of silicone rubber. The finite element model of the seal contact is established, and the influence of the height, radius and the position of the convex surface on the sealing performance is analyzed by using ABAQUS. The results show that the height and position of the surface convex have great influence on the sealing performance. Higher the height, more close to the maximum effective contact pressure and so more prone to leakage. However, the influence of convex radius on the sealing performance is relatively smaller.