粗糙表面间密封性能研究进展

在微观尺度下的静密封界面表面形貌是粗糙不平的,两粗糙表面上的微凸体在载荷作用下会接触形成孔隙;随着接触压力的减小或观察尺度的增加,当孔隙增加到一定数量时孔隙之间会相互连通形成泄漏通道,影响密封性能。现有的粗糙表面密封分析基于均化思想、逾渗理论和多孔介质思想等方法建立泄漏通道模型,考虑表面粗糙度、表面纹理以及表面载荷等对密封性能的影响。对现有的粗糙表面间密封性能的研究现状进行综述,分析现有的粗糙表面密封研究方法存在的不足之处,指出粗糙表面间密封研究可能的方向,为进一步研究粗糙表面密封机制提供了参考。

Research Progress in Sealing Performance of Rough Surface

The surface morphology of the static seal interface is rough at the micro scale,and the asperities on the two rough surfaces will contact and form pores under the load.With the decrease of contact pressure or the increase of observation scale,when the number of pores increases to a certain amount,the pores will be interconnected to form a leakage channel,affecting the sealing performance.The existing leakage channel models of rough surface seal analysis are established based on the idea of homogenization,percolation theory and porous media thought,which consider the influence of surface roughness,surface texture and load on the sealing performance.The present research status of sealing performance between rough surfaces was reviewed,the shortcomings of existing research methods for rough surface sealing were analyzed,and the possible research direction of sealing between rough surfaces was pointed out,which provided reference for further study of sealing mechanism between rough surfaces.