车辆液压减振器生热机理分析研究  

Study on Heat Generating Mechanism of Hydraulic Shock Absorber Based on CFD

作　　者：陈齐平 吴明明 康盛 魏佳成 CHEN Qi-ping;WU Ming-ming;KANG Sheng;WEI Jia-cheng(Key Laboratory of Conveyance and Equipment Ministry of Education,East China Jiaotong University,Jiangxi Nanchang 330013,China)

机构地区：[1]华东交通大学载运工具与装备教育部重点实验室,江西南昌330013

出　　处：《机械设计与制造》2021年第7期141-147,共7页Machinery Design & Manufacture

基　　金：江西省重点研发计划项目(20171BBE50039);国家自然科学基金项目(51565011);江西省杰出青年人才资助计划项目(20171BCB23059);江西省青年科学基金资助项目(20171BAB216027)。

摘　　要：为了获得液压减振器内部温度的分布状况,提高减振器的可靠性,对减振器的生热机理进行了分析研究。基于CFD的数值方法,建立了较高精度的减振器三维流体模型,在FLUENT软件中进行了仿真分析,获得了减振器在不同工况下的温度场分布云图,分析研究了不同油液参数对温度场的影响,并进行了试验验证。结果表明:高温度场主要分布在减振器活塞孔和复原阀周围;减振器活塞速度越大,减振器内部温度越高;油液参数不同,对应的油液热平衡温度也不同。此方法为解决液压减振器高温漏油和失效等问题提供了一定的参考价值。In order to obtain the distribution of internal temperature of hydraulic shock absorber and improve the reliability of hy⁃draulic shock absorber,the heat generation mechanism of shock absorber has been studied in depth.Based on CFD numerical method,a high-precision three-dimensional fluid model of shock absorber is built up,the simulation analysis is carried out by using FLUENT software,the cloud map of temperature field distribution of hydraulic shock absorber under different working con⁃ditions is obtained,the influence of different oil parameters on temperature field is analyzed and verified by experiment.The re⁃sults show that the high temperature field is mainly distributed around the piston hole and recovery valve of the shock absorber;the greater the piston speed of the shock absorber,the higher the internal temperature of the shock absorber;when the oil parame⁃ters are different,the corresponding thermal equilibrium temperature will be also different.This method provides a certain refer⁃ence value for solving the problems of high temperature oil leakage and failure of hydraulic shock absorber.

关 键 词：液压减振器 生热机理 CFD 平衡温度 油液参数 

分 类 号：TH16[机械工程—机械制造及自动化] U463.213[机械工程—车辆工程]