基于软弹流润滑模型的液压格莱圈密封性能分析  

Analysis of Sealing Performance of a Hydraulic Glyd-Ring Seal Based on Soft EHL Model

作　　者：王冰清 彭旭东[1,2] 孟祥铠[1,2] 

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310032 [2]浙江工业大学过程装备及其再制造教育部工程研究中心,浙江杭州310032

出　　处：《摩擦学学报》2018年第1期75-83,共9页Tribology

基　　金：国家基金面上项目(51575490;51775505);国家重点基础研究发展规划项目(973)(2014CB046404);浙江省自然科学基金重点项目(LZ15E050002)资助~~

摘　　要：基于软弹流理论建立了液压往复格莱圈密封的数值分析模型,该耦合模型包括流体力学、接触力学、变形和热分析.数值求解获得了密封区域的膜厚、流体压力和接触压力分布,以及单个行程的流量和活塞杆表面的摩擦力,揭示了液压往复格莱圈密封的密封机理.通过参数化进一步分析了不同密封表面均方根粗糙度、密封压力和往复速度对密封性能的影响.结果表明:在本研究中,密封区域表现为混合润滑状态,且以微凸体接触摩擦为主;较小的密封表面均方根粗糙度值具有较好的密封性能,增大密封压力会导致泄漏量和摩擦力均增加,而增大往复速度有利于减小泄漏量.A numerical analysis model for predicting the performance of a hydraulic reciprocating Glyd-ring seal based on soft EHL theory was developed,which consisted of fluid mechanics,contact mechanics,deformation analysis and thermal analysis.The film thickness distribution,fluid pressure and contact pressure distributions,as well as fluid transport per stroke and friction force on rod were performed to reveal the mechanism of hydraulic Glyd-ring seal.In addition,the influences of root mean square（RMS） roughness,sealed pressure and rod speed on sealing performance of such seal were analyzed.Analysis results indicate that the seal was under mixed lubrication,and the sealing zone was primarily contact by the contacting asperities of seal surface in this study.Furthermore,a relatively small RMS roughness had better sealing performance.And an increased sealed pressure resulted in an increasing in leakage and friction force on the rod,while an increased rod speed was propitious to reduce the leakage.

关 键 词：软弹流 格莱圈 往复密封 

分 类 号：TH136[机械工程—机械制造及自动化]