顶面阳极氧化对活塞二阶运动过程热力特性影响研究  

Research on the Effects of Anodic Oxidation on Thermal Performance of Piston Secondary Motion Process

作　　者：孙承[1] 潘俊杰[1] 杨靖[1] Sun Cheng;Pan Junjie;Yang Jing(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082)

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室

出　　处：《汽车技术》2019年第11期52-56,共5页Automobile Technology

基　　金：国家高技术研究发展计划（863计划）项目（2012AA111703）

摘　　要：为研究某汽油机活塞顶部阳极氧化对活塞二阶运动过程热力特性的影响,采用硬度塞法测得阳极氧化前、后活塞测点温度,结合数值传热法标定活塞温度场,在此基础上研究阳极氧化前、后活塞热变形导致的活塞裙部型线变化情况,并运用多体动力学方法分析阳极氧化后活塞二阶运动的变化情况。研究结果表明,活塞顶面阳极氧化后,从其顶面导入的平均热流密度减小,活塞温度降低,导致热应力、热变形减小,活塞裙部热态型线发生较大变化,使得活塞绕活塞销摆动幅度、横向位移幅度分别增加34.4%、42.4%,活塞裙部与缸套间作用力增加24.1%。To study the influence of anodizing piston top on a gasoline engine piston secondary motion process thermal performance,the measured point temperature of the piston before and after anodic oxidation is measured with the hardness plug method,and numerical heat transfer method is also used to calibrate piston temperature field.On this basis,the piston skirt profile change as a result of thermal deformation of the piston before and after anodic oxidation is studied,and multi-body dynamics was utilized to analyze the variation of the piston secondary motion after anodic oxidation.The research shows that after anodic oxidation of the piston top,the mean heat flux induced from piston top decreases,piston temperature declines,causing reduction of thermal stress and deformation,which causing great changes to the piston skirt thermal state profile,and piston amplitude of swing and longitudinal displacement around the piston pin increase by 34.4%and 42.4%respectively,whereas the applied force between the piston skirt and cylinder liner increases by 24.1%.

关 键 词：阳极氧化 活塞温度场 二阶运动 硬度塞 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程] TH113.2[机械工程—机械设计及理论]