基于泄漏率的發(fā)動(dòng)機(jī)橡膠密封壽命預(yù)測(cè)研究

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摘要： 以油泵法蘭密封結(jié)構(gòu)為研究對(duì)象，在有限元力學(xué)分析得到密封面接觸壓力分布的基礎(chǔ)上，進(jìn)一步建立粗糙峰接觸模型和平行平板泄漏模型計(jì)算密封面的泄漏率。同時(shí)通過(guò)橡膠加速老化試驗(yàn)建立橡膠性能的時(shí)溫等效模型，從而預(yù)測(cè)橡膠的密封壽命，最后通過(guò)密封泄漏率臺(tái)架試驗(yàn)進(jìn)行驗(yàn)證，試驗(yàn)結(jié)果與預(yù)測(cè)結(jié)果基本一致。

關(guān)鍵詞：橡膠密封 泄漏率 加速老化 壽命預(yù)測(cè)

中圖分類(lèi)號(hào)：TB42   文獻(xiàn)標(biāo)志碼：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型橡膠圈密封性能良好、結(jié)構(gòu)簡(jiǎn)單、成本較低，是發(fā)動(dòng)機(jī)中廣泛應(yīng)用的密封元件。（剩余5611字）