於秋萍,孙见君,马晨波
YU Qiuping,SUN Jianjun,MA Chenbo

• 1:南京林业大学机械电子工程学院

摘要(Abstract)：

基于逾渗理论,求解了密封界面不同网格层数下的逾渗阈值;分析了两粗糙表面的接触状态;根据W-M函数及其变式,通过MATLAB软件模拟,获得了不同表面形貌下接触式机械密封界面的孔隙率和密封间隙高度比。研究结果表明,两表面的形貌参数相同或相近时,侧接触特征明显,两表面的形貌参数相差越大,越接近于粗糙面与平面的接触;基于密封界面侧接触的初始孔隙率数值表达式与MATLAB模拟结果一致,验证了侧接触的正确性。本文研究为揭示机械密封界面泄漏机理和完善接触力学分析提供了新思路。
Based on percolation theory，the percolation threshold under different mesh layers of seal interface was achieved；The contact state of two rough surfaces was analyzed；Through W-M function and its variant，the porosity and the ratio of seal clearance to seal height for contacting mechanical seal interface under different surface topography were obtained by MATLAB simulation.The results show that when the morphology parameters，namely，fractal dimension D and scale coefficient G of the two surfaces are the same or similar，the characteristics of shoulder-shoulder contact are obvious.The larger the difference of the morphology parameters between the two surfaces，the closer it is to the contact between the rough surface and the plane.The numerical expression of the initial porosity based on the shoulder-shoulder contact of the sealing interface is consistent with the MATLAB simulation，which verifies the validity of shoulder-shoulder contact.This study provides a new idea for revealing the mechanism of mechanical seal interface leakage and improving contact mechanics analysis.

关键词(KeyWords)： 机械密封;孔隙率;密封间隙;接触;逾渗阈值
mechanical seal;porosity;seal clearance;contact;percolation threshold

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2018YFB2000800）

作者(Author): 於秋萍,孙见君,马晨波
YU Qiuping,SUN Jianjun,MA Chenbo

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