Y形气动密封的弹流润滑仿真分析  

Simulation Analysis of Elastohydrodynamic Lubrication of Y-shaped Pneumatic Seal

作　　者：冯镇军 聂雪阳 徐明朗 梁凤林 周震寰[2] 孙家斌[3] FENG Zhenjun;NIE Xueyang;XU Minglang;LIANG Fenglin;ZHOU Zhenhuan;SUN Jiabin(China Shipbuilding Industry Corporation Central South Equipment Co.,Ltd.,Yichang,Hubei 443005;School of Mechanics and Aerospace Engineering,Dalian University of Technology,Dalian,Liaoning 116024;School of Chemical Engineering,Ocean and Life Sciences,Dalian University of Technology,Panjin,Liaoning 124211)

机构地区：[1]中船重工中南装备有限责任公司,湖北宜昌443005 [2]大连理工大学力学与航空航天学院,辽宁大连116024 [3]大连理工大学化工海洋与生命学院,辽宁盘锦124211

出　　处：《液压与气动》2024年第8期154-161,共8页Chinese Hydraulics & Pneumatics

摘　　要：气动密封广泛应用于往复驱动机构中,其中摩擦力和泄漏量是评估密封性能的主要指标。使用弹流润滑理论建立气动往复Y形密封圈的数值分析模型,该模型耦合了流体力学、接触力学、微观变形。通过数值迭代求解获取密封区域内的油膜厚度、油膜压力和粗糙峰接触压力分布,以及单个行程内的流量和活塞杆表面的摩擦力。分析了Y形密封圈在不同气动条件下的弹流润滑特征以及密封性能。结果表明,增大密封压力会导致摩擦力和反向泵回率的增加,增大往复速度有利于减小泄漏量。Pneumatic seals are widely used in reciprocating drive mechanisms,where friction and leakage are the main indicators for evaluating sealing performance.A numerical analysis model for pneumatic reciprocating Y-shaped sealing rings was established using the theory of elastohydrodynamic lubrication,which couples fluid mechanics,contact mechanics,and microscopic deformation.Obtain the oil film thickness,oil film pressure,and rough peak contact pressure distribution within the sealed area through numerical iteration,as well as the flow rate and friction force on the piston rod surface within a single stroke.Analyzed the elastohydrodynamic lubrication characteristics and sealing performance of Y-shaped sealing rings under different aerodynamic conditions.The results indicate that increasing the sealing pressure will lead to an increase in friction and reverse pumping rate,and increasing the reciprocating speed is beneficial for reducing leakage.

关 键 词：气动密封 往复密封 弹流润滑理论 

分 类 号：TH137[机械工程—机械制造及自动化] TH138