基于流固热多场耦合的VL形往复密封性能研究  

Study on the Performance of VL-type Reciprocating Seals Based on Fluid-Solid-Thermal Multi-Field Coupling

作　　者：王跃明 邝鸿晖 陈相竹 姚志宏 胡宝银 郭飞[4] WANG Yueming;KUANG Honghui;CHEN Xiangzhu;YAO Zhihong;HU Baoyin;GUO Fei(Beijing Tsinglan Sealing Technology Co.,Ltd.,Beijing 100084,China;Midea Kitchen Appliances Manufacturing Co.,Ltd.,Foshan Guangdong 528000,China;Changchun Blue Sky High Tech Sealing Materials Co.,Ltd.,Changchun Jilin 130000,China;State Key Laboratory of Tribology in Advanced Equipment,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京清蓝新科密封技术有限公司,北京100084 [2]广东美的厨房电器制造有限公司,广东佛山528000 [3]长春蓝天高新技术密封材料有限责任公司,吉林长春130000 [4]清华大学高端装备界面科学与技术全国重点实验室,北京100084

出　　处：《润滑与密封》2025年第4期126-134,共9页Lubrication Engineering

基　　金：国防科工局配套规划项目(JPPT-145-GH-2-076)。

摘　　要：以VL形橡塑组合密封为研究对象,分析其在实际应用工况下的密封性能。针对密封件及其接触界面分别开展固体力学分析、流体力学分析、接触力学分析和流固耦合分析;综合考虑密封接触区域摩擦热的影响,建立流-固-热多物理场耦合的数值计算模型;计算得到不同往复速度下密封接触区域的宏观接触压力、粗糙峰接触压力、油膜压力和油膜厚度的分布情况,以及密封系统的温度变化、泄漏率和摩擦力;同时分析了表面粗糙度对密封性能的影响。结果表明:随着往复速度的增大,净泄漏率逐渐减小,平均摩擦力整体呈上升趋势;随着表面粗糙度的增加,泄漏率逐渐增大,内外行程流量呈现先减小后增大的趋势。推荐密封表面粗糙度范围为0.8~2.6μm。A VL-type rubber and plastic composite seal was studied,and its sealing performance was analyzed under practical application conditions.Solid mechanics analysis,fluid mechanics analysis,contact mechanics analysis,and fluidstructure coupling analysis were conducted for the seal and its contact interface.By comprehensively considering the influence of friction heat in the seal contact area,a numerical model of fluid-solid-thermal multi-physical field coupling was established.The distribution of macroscopic contact pressure,rough peak contact pressure,oil film pressure,and oil film thickness,as well as the temperature change,leakage rate,and friction force at different reciprocating speeds,were calculated.The influence of surface roughness on sealing performance was also analyzed.The results show that as the reciprocating speed increases,the net leakage rate gradually decreases,and the average friction force shows an overall upward trend.With the increase of surface roughness,the leakage rate gradually increases,and the internal and external stroke flow rates exhibit a trend of decreasing first and then increasing.The recommended sealing surface roughness range is between O.8μm and 2.6μum.

关 键 词：VL形往复密封 混合润滑 泄漏率 表面粗糙度 流固热耦合 

分 类 号：TB42[一般工业技术]