O形橡胶密封圈的热应力耦合分析.pdf

2015年1月
润滑与密封
2015
第40卷第1期
LUBRICATON ENGINEERING
Vol40 No. 1
DOI:10.3969/ l. ssn.0254-0150.2015.01,013
O形橡胶密封圈的热应力耦合分析
韩彬鲁金忠李传君2王志强刘传刚黄婉婉
(1.江苏大学机械工程学院江苏镇江212013;2.江苏大学能源与动力工程学院江苏镇江212013;
3.中国机械工业联合会北京100823;4.中海油天津分公司天津300452)
摘要:研究原油高温热采工具O形橡胶密封圈在高温高压下的密封特性。借助于大型有限元分析软件 ANSYS,建
立形橡胶密封圈及其边界的二维轴对称有限元模型,研究油压、装配间隙和摩擦因数对密封面最大接触应力、剪切
3应力和 Von Mises F应カ的影响,并采用热应力耦合分析方法,分析温度对O形密封圈密性能的影响。结果表明:摩擦
8因数对应力影响不大,而油压和装配间隙对应力影响很大,过大的装配间隙会造成の形橡胶密封圈最大接触应力下降
和最大剪切应力上升,造成密封失效;当温度升高时,密封圈最大剪切应力和接触应力相应减小,而最大 Von Mises应
力明显减小,因此应使0形密封圈在适当的温度下工作,以确保密封的可靠性
关键词:0形密封圏;接触应力;剪切应力;热应力耦合分析
中图分类号:TB42文獻标志码;A文章编号:0254-0150(2015)1-058-5
Thermal Stress Coupling Analysis of Rubber
O-sealing Ring
Han Bin Lu Jinzhong Li Chuanjun Wang Zhiqiang Liu Chuangang' Huang Wanwan
(1. School of Mechanical Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China
2. School of Energy &Power Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China
3. China Machinery Industry Federation, Beijing 100823, China
4. Tianjing Subsidiary of CNOOC, Tianjing 300452, China)
Abstract: The sealing performance of rubber O-ring used for high-temperature thermal mining tool was studied at high
temperature and high pressure. With the help of large-scare finite element analysis software ANSYS, the two-dimensional
axisymmetric finite element model of rubber O-ring and its boundary were built. Some factors influencing maximal contact
stress, shear stress and Von Mises stress of sealing face were analyzed, such as oil pressure, assembly gap and friction coef-
ficient. The influence of temperature on the stress of O-ring was investigated by using thermal stress coupling analysis
method. Results show that oil pressure and assembly gap have great effect on the stresses, however, friction coefficient has
little effect on the stresses. With the inereasing of temperature, the maximum shear stress and contact stress are decreased
and maximum Von Mises stress is decreased obviously. The appropriate working temperature should be guaranteed to pro
mote the sealing reliability of high-temperature thermal mining tool
Keywords: O-ring; contact stress; shear stress; thermal stress, coupling analysis
随着国民经济的快速发展,陆地石油资源的不断150℃以下进行,开采工具的密封部件基本上都是采
减少,海上稠油开采将会成为热点之一。海上稠油开用简单高效、可靠性高的橡胶O形圈,而橡胶0形
采通常采用高温热采作业模式,因此对开采工具的高圈的耐用性、可靠性以及密封性能对温度比较敏感,
温高压密封性能要求较高。当前原油开采一般都是在同时对安装结构尺寸也有一定的要求。O形密封圈简
称0形圈,是一种截面为圆形的橡胶密封圈,其成
*基金项目:“十ニ五”国家重大科技专项课题(20112X05024-本低廉、安装和使用方便,被广泛应用于机械、汽
005004
车、动力及石油化工等领域-列。
收稿日期:2014-04-20
作者简介:韩彬(1988-),男,硕士研究生,从事密封设计与
对于常温下橡胶0形圈的密封性能,目前研究
分析和激光冲击强化等方面的研究。E-mail: hanbin455710366
报道较多,而对于高温(150℃以上)下密封性能的
@163.com
研究,公开报道尚不多见。研究高温(在橡胶材料可