基于多孔介质理论的双粗糙面金属静密封泄漏模型

doi:10.3901/JME.2022.21.215

机械工程学报 ›› 2022, Vol. 58 ›› Issue (21): 215-224.doi: 10.3901/JME.2022.21.215

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基于多孔介质理论的双粗糙面金属静密封泄漏模型

崔颖¹, 于颖嘉¹, 张宏翔¹, 钟兢军²

1. 大连海事大学船舶与海洋工程学院大连 116000;
2. 上海海事大学商船学院上海 200240

收稿日期:2021-12-09 修回日期:2022-06-23 出版日期:2022-11-05 发布日期:2022-12-23
通讯作者: 于颖嘉(通信作者),男,1990年出生,博士研究生。主要研究方向为金属静密封、接触力学与振动控制。E-mail:cf_yuyingjia@sina.com
作者简介:崔颖,女,1977年出生,博士,副教授。主要研究方向为转子动力学、管路连接结构设计与密封性能分析。E-mail:cuiying@dlmu.edu.cn
基金资助:
中央高校基本科研业务费基础培育基金资助项目（3132015204）。

Leakage Model of Metal Static Seal with Two Rough Surfaces Based on the Theory of Porous Medium

CUI Ying¹, YU Yingjia¹, ZHANG Hongxiang¹, ZHONG Jingjun²

1. Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian 116000;
2. Merchant Marine College, Shanghai Maritime University, Shanghai 200240

Received:2021-12-09 Revised:2022-06-23 Online:2022-11-05 Published:2022-12-23

摘要/Abstract

摘要： 粗糙面微观几何形貌是影响静密封泄漏特性的重要因素。应用粗糙面的三维点云数据，将粗糙面进行离散化处理，进而将由双粗糙面构成的密封界面等效为三维逾渗栅格模型，基于多孔介质理论计算得到密封界面的孔隙率和渗透率，从而建立了一种双粗糙密封界面的泄漏率模型。搭建金属静密封泄漏率测量试验台，通过对环面金属静密封泄漏特性的试验研究，验证了该泄漏模型的有效性。利用该模型分析了表面纹理方向、粗糙面波动频率与材料特性对金属静密封泄漏特性的影响。结果表明：各向异性粗糙面构成的密封界面具有较好的密封性能；粗糙面波动频率越大，密封性能越好；低硬度材料易于实现有效密封；在重载情况下，粗糙面微观几何形貌对孔隙率与泄漏率的影响不显著。

关键词: 金属静密封, 粗糙面, 多孔介质, 三维逾渗栅格模型, 泄漏模型

Abstract: The micro-geometric topography of the rough surface is an important factor affecting the leakage characteristics of static seals. According to the point cloud data of the rough surface, the rough surface is discretized, and the sealing interface consist of two rough surfaces is equivalent to a three-dimensional percolation grid model. The porosity and permeability of the sealing interface are calculated based on the theory of porous medium, and then the leak model of the sealing interface is proposed. Furthermore, a test rig for measuring the leakage rate of metal static seal is set up, the leakage model is proved to be reasonable and correct by sealing experiment. The influences of the direction of the surface texture, the fluctuation frequency of the rough surface and the sealing material on the leak rate are studied. The numerical simulation shows that the sealing interface consisted of anisotropic surfaces has best sealing performance; the fluctuation frequency of the surface is positively correlated with the sealing performance; materials with low hardness are easy to achieve effective sealing; in the case of a high contact load, the effect of surface topography on the leak rate is negligible.

Key words: metal static seal, rough surface, porous medium, three-dimensional percolation grid model, leakage model

中图分类号:

V231

崔颖, 于颖嘉, 张宏翔, 钟兢军. 基于多孔介质理论的双粗糙面金属静密封泄漏模型[J]. 机械工程学报, 2022, 58(21): 215-224.

CUI Ying, YU Yingjia, ZHANG Hongxiang, ZHONG Jingjun. Leakage Model of Metal Static Seal with Two Rough Surfaces Based on the Theory of Porous Medium[J]. Journal of Mechanical Engineering, 2022, 58(21): 215-224.

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基于多孔介质理论的双粗糙面金属静密封泄漏模型

Leakage Model of Metal Static Seal with Two Rough Surfaces Based on the Theory of Porous Medium

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