船用柴油机电控喷油器针阀偶件耐久性分析  

Durability Analysis of Needle Valve Assembly of Electronic Fuel Injector for Marine Diesel Engine

作　　者：孔晨 金江善[1,2] 徐建新 金锋 KONG Chen;JIN Jiangshan;XU Jianxin;JIN Feng(Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China;National Engineering Research Center of Special Equipment and Power System for Ship and MarineEngineering,Shanghai 201108,China)

机构地区：[1]上海船用柴油机研究所,上海201108 [2]船舶与海洋工程特种装备和动力系统国家工程研究中心,上海201108

出　　处：《柴油机》2023年第1期35-38,43,共5页Diesel Engine

基　　金：上海市优秀技术带头人项目(19XD1433600);船舶与海洋工程特种装备和动力系统国家工程研究中心资助项目。

摘　　要：针对电控燃油喷射系统中针阀偶件的耐久性问题,对某型电控喷油器原理进行阐述,分析针阀偶件可能的失效机理。通过建模与仿真,在机理分析的基础上重点对冲击疲劳寿命进行预测分析。通过试验对针阀偶件失效机理及预测寿命的准确性进行验证。试验结果证明耐久性分析模型有效,可为同类部件的耐久性分析提供参考,并为电控喷油器寿命设计优化提供支撑。In view of the durability of the needle valve assembly in the electronic fuel injection system,the principle of a certain type of electronic fuel injector is described,and the possible failure mechanism of the needle valve assembly is analyzed.Through modeling and simulation,the impact fatigue life was mainly predicted and analyzed on the basis of mechanism analysis.The failure mechanism of needle valve assembly and the accuracy of life prediction were verified through tests.The test results show that the durability analysis model is effective,which can provide reference for the durability analysis of similar components,and provide support for the life design optimization of electronically controlled fuel injectors.

关 键 词：柴油机 电控喷油器 针阀偶件 失效 耐久性 

分 类 号：TK423.84[动力工程及工程热物理—动力机械及工程]