新型L形密封圈密封性能有限元分析

Finite Element Analysis of the Sealing Performance of a New L-shaped Seal

综合考虑橡胶材料、介质等多种因素对新型密封圈的密封性能影响,利用ABAQUS软件对新型L形密封圈进行有限元仿真分析,得到接触界面的接触压力分布。基于FFT的方法,将重构后的表面形貌特征与接触压力建立函数关系,采用栅格模型搜寻泄漏通道,依托平行平板模型进行流体力学分析,求解泄漏率。研究在2.6 MPa的流体压力下,不同厚度的密封圈的应力应变和密封面接触压力分布。结果表明:随着密封圈厚度和介质压力增大,体积泄漏率呈上升趋势,泄漏通道接触面积逐步扩大。研究结果对新型橡胶密封圈的寿命预测和失效分析具有指导意义。

By comprehensively considering the influence of rubber material,medium and other factors on the sealing performance of the new seal,finite element simulation analysis of a new L-shaped seal was carried out using ABAQUS software to obtain the contact pressure distribution at the contact interface.Based on the FFT method,the reconstructed surface morphological features were established as a function of the contact pressure.A raster model was used to search for leakage channels,and hydrodynamic analysis was carried out to solve the leakage rate relying on the parallel flat plate model.The stress-strain and the contact pressure distribution of the sealing rings with different thicknesses under a fluid pressure of 2.6 MPa were studied.The results show that the the volumetric leakage rate tends to increase with the increase of seal thickness and medium pressure,and the contact area of the leakage channel expands gradually.The research result is of guidance for the life prediction and failure analysis of new rubber seals.