发动机活塞拍击动力学分析及活塞表面磨损预测  

Dynamics Analysis of Engine Piston Slapping and Forecast of the Piston Surface Wear

作　　者：李正守[1,2] 郭立新[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]金策工业综合大学机械科技学院,朝鲜平壤999093

出　　处：《东北大学学报（自然科学版）》2013年第3期413-416,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50875041;51135003);新世纪优秀人才支持计划项目(NCET-08-0103);高等学校博士学科点专项基金资助项目(20100042110013);中央高校基本科研业务费专项资金资助项目(N090503001);沈阳市科学技术计划项目(F11264146)

摘　　要：针对活塞在缸内的拍击直接导致了活塞和气缸套摩擦磨损的问题,提出在多体动力学分析软件AVL-EXCITE中建立包括活塞、气缸套、活塞环组、活塞销以及连杆的模型,输入发动机相关结构参数和工况条件,进行了活塞拍击动力学仿真,利用模拟结果数据预测活塞表面磨损趋势和分析了活塞型线的变化.结果表明:活塞拍击运动参数随活塞和气缸套之间的间隙变大而增大,本来有中凸型线的活塞变成倾斜圆筒活塞.模拟结果跟实际观察结果相对比,二者有比较好的一致性.According to the problems about the friction wear of the piston and cylinder which results from the piston slapping of engine, the model with the piston, cylinder, piston pin, piston rings and connecting rod was built in the multi-body dynamics software AVL-EXCITE. The piston slapping dynamics simulation was carded out when the engine oriented parameters and working conditions were input. According to the simulation result data, predicting the piston surface wear trend and analysis of the piston profile change were carded out. It was found that the piston slapping parameters also increase with the increment of the gap between piston and cylinder, and convex piston becomes skewed cylinder piston. The simulation results and the actual observation results are consistent through the contrast.

关 键 词：发动机 活塞拍击 动力学仿真 磨损预测 型线变化 

分 类 号：TG335.58[金属学及工艺—金属压力加工]