水液压O形圈锥面密封特性分析  

Characteristics Analysis of Conical Surface Sealing with O-ring in Water Hydraulic

作　　者：杨友胜[1,2] 王杰 YANG You-sheng;WANG Jie(College of Engineering,Ocean University of China,Qingdao,Shandong 266100;Science and Technology on Underwater Vehicle Technology of Harbin Engineering University,Harbin,Heilongjiang 150001)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]哈尔滨工程大学水下机器人技术重点试验室,黑龙江哈尔滨150001

出　　处：《液压与气动》2020年第2期30-35,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51475197,51275495,51708 528);国家级大学生创新创业训练计划(201910423117);中央高校基本科研业务费专项(201562009);山东省重点研发计划项目(2017GGX30106);山东省自然科学基金(ZR2018MEE 023);水下机器人技术重点实验室研究基金(SXJQR2017KFJJ04)

摘　　要：针对水液压提升阀中的锥面密封问题,利用Abaqus有限元分析软件建立了锥面密封结构的二维轴对称模型,对其进行密封性能分析。分析了不同预压缩率、不同密封压力作用对O形密封圈所受最大接触压力、最大Mises应力的影响,确定了密封圈的易失效位置以及接触面的压力分布规律。结果表明:随着压缩率及密封圈所受液体压力的增大,密封圈所受到的最大Mises应力及接触面最大接触压力随之增大;带圆倒角的密封槽口或减小密封间隙,能有效减小密封圈挤出时密封槽口对密封圈的剪切应力,从而提高密封圈使用寿命,为水液压提升阀等液压元件的锥面密封结构设计提供设计依据。In view of the existing limitations of conical surface sealing in water hydraulic poppet valve,an axisymmetric model of the conical surface seal structure is established and the sealing characteristics are analyzed by using the finite element analysis software Abaqus.Influencing factors of Mises stress,the seal ring surface contact pressure under different pre-compression ratios and different liquid pressures are studied,the positions of material failure are defined and the distribution of contact pressure and Mises stress are obtained.The results show that Mises stress and maximum contact pressure of the contact surface increases correspondingly with the increase of pre-compression ratio and the liquid pressure;the sealing groove with round chamfer or smaller sealing gap can effectively reduce the shear stress of the sealing ring when the O-ring is extruded,resulting in a longer life of sealing rings.This study provides a basis for the design of the conical surface seal structure of water hydraulic poppet valve.

关 键 词：锥面密封 Mises应力 非线性有限元分析 O形圈 

分 类 号：TH137[机械工程—机械制造及自动化]