基于泄漏率的发动机橡胶密封寿命预测研究

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摘要： 以油泵法兰密封结构为研究对象，在有限元力学分析得到密封面接触压力分布的基础上，进一步建立粗糙峰接触模型和平行平板泄漏模型计算密封面的泄漏率。同时通过橡胶加速老化试验建立橡胶性能的时温等效模型，从而预测橡胶的密封寿命，最后通过密封泄漏率台架试验进行验证，试验结果与预测结果基本一致。

关键词：橡胶密封 泄漏率 加速老化 寿命预测

中图分类号：TB42   文献标志码：B   DOI： 10.19710/J.cnki.1003-8817.20240386

Research on Lifetime Prediction of Engine Rubber Seal Based

on Leakage Rate

Rao Cong， Zhai Liming， Liang Fuxiang， Wang Xin

（FAW Jiefang Automobile Co.， Ltd. Powertrain Business Division， Wuxi 214000）

Abstract： In this study， taking the sealing structure of oil pump flanges as the research object， a rough peak contact model and a parallel flat plate leakage model are further established to calculate the leakage rate of the sealing surface based on the contact pressure distribution on the sealing surface obbtained by finite element mechanical analysis. At the same time， the time-temperature equivalent model of rubber performance is established by rubber accelerated aging test so as to predict rubber sealing life. Finally， the rubber sealing life is verified by seal leakage rate bench test， proving that the test result is basically consistent with the prediction result.

Key words： Rubber seal， Leakage rate， Acceleration aging， Lifetime prediction

1 前言

O型橡胶圈密封性能良好、结构简单、成本较低，是发动机中广泛应用的密封元件。（剩余5611字）