基于iSight的柴油机喷油摇臂结构优化  

Optimization Design of Diesel Injector Rocker Arm Based on iSight Platformm

作　　者：林献坤[1] 王双 李检华 Lin Xiankun;Wang Shuang;Li Jianhua(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Steyr Motors Co.,Ltd.,Changzhou City,Jiangsu Province 213164,China)

机构地区：[1]上海理工大学机械工程学院,上海市200093 [2]斯太尔动力(常州)发动机有限公司,江苏省常州市213164

出　　处：《农业装备与车辆工程》2019年第2期100-105,共6页Agricultural Equipment & Vehicle Engineering

摘　　要：喷油摇臂是控制发动机喷油的关键部件,工作过程承受往复周期负载,容易疲劳失效,优化喷油摇臂对提升发动机整体性能具有重要作用。基于此,分析了传统叉形柴油机摇臂容易断裂的原因,通过AVL Excite TD进行动力学分析和实验验证,得到摇臂泵喷嘴侧反作用力负载,在Abaqus中对摇臂进行有限元分析,给出摇臂发生破坏性断裂的机理。通过iSight优化软件与Abaqus集成,采用优化有限元方法,以摇臂承受的最大应力值为目标函数,应用粒子群算法进行优化求解,设计了新型的摇臂结构。对两种摇臂机构的强度、刚度及抗疲劳性进行了对比,结果表明,新结构明显优于传统叉形结构。最后,对设计的新型摇臂机构进行了耐久性实验测试,验证了新结构设计的合理性和优越性。Injector rocker arm is one of the key components to control fuel injection of engine.In the work process,it bears cycle load which leads to fatigue failure.So it is significant for the whole engine to possess an optimal structure in the rocker arm.Analysis of fracture in a conventional fork-type rocker arm is conducted.With the combination method of AVL Excite TD based analysis and experimental tests,the counterforce is acquired on the valve side of the arm.With finite element analysis of the rocker arm,the reason of the destructive fracture is obtained.Then a new rocker arm structure is presented on the basis of an updated finite element,which is integrated with iSight and Abaqus,with maximum stress of the rocker arm as the objective function and particle swarm optimization as the solver.In comparisons of strength,stiffness and fatigue resistance between the two rocker arm structures,the result shows that the new structure is superior to the conventional fork-type arm.Finally the result in a durability test shows the feasibility and advantage of the new structure.

关 键 词：摇臂机构 有限元优化 柴油机 结构优化 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]