石墨金属缠绕垫的孔隙结构分析与泄漏模拟  

Pore Structure Analysis and Leakage Simulation of Graphite-Metal Spiral Wound Gaskets

作　　者：郭璐怡 章兰珠[1] GUO Luyi;ZHANG Lanzhu(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海手200237

出　　处：《润滑与密封》2025年第4期48-57,共10页Lubrication Engineering

基　　金：国家重点研发计划项目(202YFB2008000)。

摘　　要：金属石墨缠绕垫是石化行业中应用比较广泛的密封垫片类型之一,其中的石墨缠绕层是垫片的主要密封元件,其孔隙分布决定了垫片泄漏率的大小。基于压汞测试和CT扫描,结合Avizo软件对石墨缠绕层进行微观分析,并进行微观孔隙结构的三维重构。通过统计孔隙结构参数与压汞实验结果的对比,验证数字岩心重构的准确性和代表性,并从微观层面发现石墨材料拥有显著的均匀性和连通性。应用ANSYS软件进行金属石墨缠绕垫受压状态下应力分析,同时运用Fluent软件模拟流体在压力差的作用下在石墨微观结构的渗流行为,以及在应力作用下缠绕垫的压力和速度场分布。这种从微观到宏观的研究方法为石墨金属缠绕垫的渗透泄漏研究提供了新思路。The graphite-metal wound gasket is extensively utilized in the petrochemical industry owing to its superior sealing capabilities.The graphite winding layer serves as the primary sealing component of the gasket,with its pore distribution being a critical determinant of the gasket′s leakage rate.Through mercury intrusion porosimetry and CT scanning,a microanalysis of graphite materials was conducted,augmented by Avizo software,facilitating a three-dimensional reconstruction of the micro-pore architecture.The congruence of pore structure parameters with mercury intrusion experimental results substantiated the precision and representativeness of the digital core reconstruction,revealing notable uniformity and connectivity within the graphite materials at a microscopic scale.ANSYS software was employed to perform stress analysis on the graphite-metal wound gasket under compressive conditions,while Fluent was utilized to simulate fluid permeation dynamics within the microstructure,alongside the distribution of pressure and velocity fields in the macrostructure under stress.This multi-scale research methodology,bridging the microscopic to the macroscopic,offers novel perspectives on the investigation of permeation and leakage in graphite metal-wound gaskets.

关 键 词：金属石墨缠绕垫 孔隙结构 渗流 三维重构 数字岩心 

分 类 号：TB42[一般工业技术]