基于ABAQUS的流体压力渗透O形圈密封性能仿真研究

Simulation Study on O-ring Performance of Fluid Pressure Penetration Based on ABAQUS

为了探究液压系统中O形圈预压缩率、介质压力以及系统温度对O形圈密封性能的影响,该文通过有限元方法在ABAQUS中建立O形圈密封的二维有限元模型,采用流体压力渗透的加载方式模拟介质加压过程,该加载方式能自动精确地找到密封分离与接触的临界点,分析了O形圈在上述因素作用下等效应力和接触压力的变化规律。结果表明:预压缩率和系统温度对O形密封圈密封性能有一定的影响,而O形圈应力的变化主要取决于介质压力的变化,随着介质压力的增大,密封圈的接触压力也随之增大,并且密封圈的接触压力始终存在,表明O形密封圈密封性能良好。

In order to explore the influence of O-ring pre-compression rate,medium pressure and system temperature in hydraulic system on O-ring sealing performance,this paper uses finite element method to establish a two-dimensional finite element model of O-ring seal in ABAQUS,using fluid pressure penetration The loading method simulates the medium pressurization process.This loading method can automatically and accurately find the critical point of seal separation and contact,and analyzes the change law of the equivalent stress and contact pressure of the O-ring under the action of the above factors.The results show that the pre-compression rate and system temperature have a certain effect on the sealing performance of the O-ring seal,and the change of the O-ring stress mainly depends on the change of the medium pressure.As the medium pressure increases,the contact pressure of the seal ring also It increases and the contact pressure of the seal ring always exists,indicating that the O-ring seal has good sealing performance.