高压燃油系统油管接头密封性能研究  

Research on Sealing Performance of Pipe Joints in High Pressure Fuel Systems

作　　者：贾小丽 云峰 李丽萍 董伟杰 范立云 JIA Xiaoli;YUN Feng;LI Liping;DONG Wejie;FAN Liyu(State Key Laboratory of Engine and Power Train System,Weifang 261061,Shandong,China;Weichai Power Co.,Ltd.,Weifang 261061,Shandong,China;College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]内燃机与动力系统全国重点实验室,山东潍坊261061 [2]潍柴动力股份有限公司,山东潍坊261061 [3]哈尔滨工程大学能源与动力工程学院,哈尔滨150001

出　　处：《船舶工程》2024年第5期77-83,共7页Ship Engineering

基　　金：内燃机与动力系统全国重点实验开放基金资助项目(SKLER-202115)。

摘　　要：为了研究燃油系统油管接头密封性能的影响因素,以某柴油机高压油管接头为研究对象,借助Hypermesh及ANSYS软件建立高压油管接头密封的有限元模型。根据赫兹接触理论及vonMises应力计算,探究不同预紧力、不同轨压作用下高压油管接头密封带宽度及最大等效塑性应变的变化规律。结果表明:密封带宽度、最大等效塑性应变与预紧力呈正相关,且最大等效塑性应变与预紧力变化呈三次方关系;密封带宽度与轨压呈负相关,而轨压对等效塑性应变影响不显著,该研究结果可为高压油管接头的安装设计及管接头预紧力的选择提供理论支撑。In order to study the influencing factors of the sealing performance of fuel system fuel pipe joints,a finite element model of high-pressure fuel pipe joint sealing is established with the help of Hypermesh and ANSYS software taking a diesel engine high-pressure fuel pipe joint as the research object.According to Hertzian contact theory and von Mises stress calculation,the variation law of sealing band width and maximum equivalent plastic strain of high-pressure fuel pipe joint under different preload and different oil supply pressure is explored.The results show that the sealing band width and maximum equivalent plastic strain are positively correlated with the preload,and the maximum equivalent plastic strain has a cubic relationship with the change of preload.The sealing band width is negatively correlated with the oil supply pressure,while the oil supply pressure has no significant effect on the equivalent plastic strain,and the research results can provide theoretical support for the installation design of high-pressure fuel pipe joints and the selection of pipe joint preload.

关 键 词：高压燃油系统 油管接头 密封带宽度 等效塑性应变 预紧力 

分 类 号：U671.99[交通运输工程—船舶及航道工程]