Y形高压往复密封结构可靠性分析及结构优化  

Reliability Analysis and Structure Optimization of Y-shaped High-pressure Reciprocating Seal

作　　者：杨鎏 陈国强[1] 李杰伟 YANG Liu;CHEN Guo-qiang;LI Jie-wei(School of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China;Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湖南工程学院机械工程学院,湖南湘潭411104 [2]湘潭大学,湖南湘潭411105

出　　处：《液压气动与密封》2025年第4期43-51,共9页Hydraulics Pneumatics & Seals

基　　金：湖南省自然科学湘潭市联合基金(2020JJ6015)。

摘　　要：由于高压往复密封系统工况复杂,密封失效频繁,严重制约了大型液压装备性能的发挥。以Y形往复密封结构为对象,基于CAE分析和正交试验方法,对往复密封系统进行可靠性分析和结构优化。首先构建了往复密封结构二维对称有限元模型,仿真分析了密封系统的介质压力、预压量以及密封间隙对高压往复密封性能的影响规律,得到了密封圈根部出现挤压的临界压力为28 MPa;然后通过正交试验方法分析了Y形密封圈各关键结构参数对密封可靠性的影响规律,确定了Y形密封圈的最优结构参数;最后通过CAE方法对优化的结构参数进行了验证。结果表明:该优化的结构参数能够有效控制密封圈根部的挤压,并能降低密封最大接触压力和最大等效应力,可有效提升高压背景下Y形往复密封结构的可靠性。Due to the complex working conditions of the high-pressure reciprocating sealing system and the frequent sealing failures,the performance of large-scale hydraulic equipment is seriously restricted.In this study,the reliability analysis and structural optimization of the reciprocating sealing system were carried out based on CAE analysis and orthogonal test methods.Firstly,a two-dimensional symmetric finite element model of the reciprocating sealing structure was constructed,and the influence of the medium pressure,prepressure and sealing clearance of the sealing system on the performance of the high-pressure reciprocating sealing was simulated and analyzed,and the critical pressure of extrusion at the root of the sealing ring was obtained as 28 MPa.Then,the influence of the key structural parameters of the Y-ring on the sealing reliability was analyzed by the orthogonal test method,and the optimal structural parameters of the Y-ring were determined,and finally the optimized structural parameters were verified by the CAE method.The results show that the optimized structural parameters can effectively control the extrusion of the root of the sealing ring,and can reduce the maximum contact pressure and maximum equivalent stress of the seal,which can effectively improve the reliability of the Y-shaped reciprocating sealing structure under the background of high pressure.

关 键 词：Y形密封圈 往复密封 可靠性 结构优化 

分 类 号：TB42[一般工业技术] TH136[机械工程—机械制造及自动化]