润滑性能对活塞轴系的影响  

Influence of Lubrication Performance on a Piston-Crankshaft System

作　　者：刘永红[1] 任工昌[1] 王步康[1] 张优云[1] 

机构地区：[1]西安交通大学润滑理论及轴承研究所,陕西西安710049

出　　处：《润滑与密封》2004年第4期16-18,共3页Lubrication Engineering

基　　金：国家自然科学基金项目 (编号 :5 9990 4 72 );86 3计划资助项目 (编号 :2 0 0 1AA4 1 1 31 0 )

摘　　要：以四缸内燃机为例 ,在建立三维装配实体的基础上 ,采用有限元法对活塞 -轴系和机体进行了动特性分析。在建模中充分考虑了实际约束条件 ,并对关键部件的接触问题作了处理。计算采用系统级的动特性分析方法获得了曲轴轴系的扭转、弯曲、伸缩振动及其复合振动 ,计算结果表明油膜刚度、阻尼系数的增加会导致活塞 -轴系振动频率的增加。The 3 D assembly model of a four cylinder engine with a piston crankshaft system and block was established, actual restrictions and contact areas of key parts were considered in model construct, and then the dynamic characteristics of system level were carried out by FEM method. The calculation about the torsion,bend, flexibility and compound vibration was carried out. The result shows that the vibration frequency of the piston crankshaft system and block increase with the increasing of stiffness and damping coefficients of oil film.

关 键 词：活塞-轴系 四缸内燃机 摩擦系数 模态分析 润滑性能 有限元法 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程] TH117[机械工程—机械设计及理论]