深海液压系统X形橡胶圈密封性能分析.pdf

2015年2月
润滑与密封
Feb.2015
第40卷第2期
L UBRICATION ENGINEERING
Vol 40 No.2
DOI:10.3969/,issn.0254-0150.2015.02.016
深海液压系统ⅹ形橡胶圏密封性能分析
张毅王国志刘桓龙邓帆
(西南交通大学机械工程学院四川成都610031)
摘要:利用 ANSYS软件建立深海环境下工作的液压系统的X形圈密封结构的二维轴对称模型,计算X形圈在不同
密封状态下的应力分布,分析压缩率、密封压力、摩擦因数等因素对其密封性能和相关应力的影响。结果表明:应力随
压缩率、密封压力、摩擦因数的增大而增大;静态密封时,X形圈内侧与密封槽会形成密闭空腔,不适合应用于深海环
g境;承载密封时,密封压力对接触应力、等效应カ、剪切应力的影响依次减小;滑动密封时,摩擦应力逐渐趋于稳定,
且密封压力和摩擦因数对摩擦应力影响较大
关键词:深海;密封;X形圈;应力;液压系统
中图分类号:B42文献标志码:A文章编号:0254-0150(2015)2-085
Analysis of Seal Performance for X-ring of Deep-sea
Hydraulic System
Zhang Yi Wang Guozhi Liu Huanlong Deng Fan
(College of Mechanical Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China)
Abstract: The two-dimensional axial symmetric model of X-ring seal structure used in deep-sea hydraulic system was
created by using the ANSYS software. The stress distribution of X-ring was calculated for difterent sealing eonditions, and
the impact of compression, sealing pressure, friction coefficient on its sealing performance and related stress was analyzed
for different sealing condition. The results show that the stress is increased along with the increasing of compression rate
sealing pressure and friction coefficient. Some closed cavities are fomed between inner side of X-ring and sealing groove
so the X-ring is not suitable to use in deep sea environment for static sealing. The impact of sealing pressure on contact
stress, equivalent stress and shear stress is decreased in turn for loading sealing condition. The friction stress is gradually
tended to be stabilized for the sliding sealing condition, and the sealing pressure and friction coefficient have a greater im
pact on the friction stress
Keywords: deep-sea; seal; X-ring; stress hydraulic system
X形橡胶圈是在O形圈的基础上改进而来,在液究深海环境下ⅹ形圈的密封性能提供参考。
压系统中可以替代0形圈。与0形圏相比,X形圈
有限元分析模型
具有较低的摩擦力,能较好地克服扭转,可获得更好
仿真模型
的密封效果-2。深海液压系统工作在深海环境下,
根据密封技术手册确定深海液压系统X形圈密
在深海5000m处环境压力达到50MPa21,对X形封结构及其仿真模型],如图1所示。
圈的密封性能提出了更高的要求。
目前,国内外学者对X形圈的密封性能的研究
缸
较少口)。本文作者利用 ANSYS有限元软件建立了
深海液压系统X形橡胶圈密封结构的二维轴对称模
型,分析了不同密封状态下,压缩率、密封压力、摩
擦因数等因素对其密封性能和相关应力的影嗨,为研
密封槽
*基金项目:国家863计划项目(2012AA091104)
(a)X形密封结构
(b) ANSYS仿真模型
收稿日期:2014
图1X形圈密封结构及其仿真模型
作者简介:张毅(1989-),男,硕土研究生,研究方向为机电
ig 1 X-ring seal structure (a) and its simulation model (b)
液一体化应用技术。E-mail:zhylw123@163.com