基于有限元分析的O形圈密封高压咬伤问题研究  

Pressure Damage Problem Research of O-sealing Ring with Finite Element Analysis

作　　者：郭建伟[1] 张佳林[1] 王海涛[1] 王冉婷 GUO Jian-wei;ZHANG Jia-lin;FANG Hai-tao;FANG Ran-ting(Beijing Institute of Space Launch Technology,Beijing 100076,China)

机构地区：[1]北京航天发射技术研究所,北京100076

出　　处：《液压气动与密封》2018年第7期76-79,83,共5页Hydraulics Pneumatics & Seals

摘　　要：该文对O形密封圈采用超弹性单元建立了轴对称非线性二维有限元分析模型,利用ANSYS有限元分析软件,采用增强拉格朗日几何非线性和接触非线性算法求解。对液压静态O形橡胶密封圈在不同预压缩量、胶料硬度、介质压力、密封腔间隙等边界条件下,进行O形圈的变形应力-应变分布规律研究,确定导致高压下O形圈间隙咬伤的密封失效准则和失效判据。建立了实现O形圈高压下有效密封的包络区域,并同试验结果对比验证了仿真结果的正确性,为指导高压下O形圈密封沟槽的优化设计提供参考。The hyper-elastic unit of axial symmetric non-linear finite elements analysis model for 0 rubber sealing ring is build. The ANSYS finite element analysis software is used to calculate the geometry non-linear and contact non-linear of augmented Lagrange algorithm. According to the different boundary condition of pre-compress, plastics hardness, oil pressure and seal clearance, the stress-deformation discipline of 0 rubber sealing ring in hydraulic static condition is analyzed. And also the seal failure norm and criterion leading to high pressure clearance damage is determined. The valid seal envelopment area of 0 ring in high pressure is established, and also be proved to be correct from simulation and experiment. These achievements will provide outstanding reference for O rubber sealing ring gap design.

关 键 词：O形密封圈 有限元分析 变形应力——应变 间隙咬伤 

分 类 号：TB42[一般工业技术]