基于多场耦合的柴油机缸套变形分析  

ANALYSIS OF DIESEL ENGINE CYLINDER LINER DEFORMATION BASED ON THE MULTI-FIELD COUPLING METHOD

作　　者：吴礼民 姚国仲[1] 毕玉华[1] 张宁[2] 王会[1] 逯飞飞 雷基林[1] WU LiMin;YAO GuoZhong;BI YuHua;ZHANG Ning;WANG Hui;LU FeiFei;LEI JiLin(Kunming University of Science and Technology,Yunnan Key Laboratory of Internal Combustion Engine,Kunming 650500,China;Kunming Yunnei Power Co.,Ltd.,Kunming 650500,China)

机构地区：[1]昆明理工大学,云南省内燃机重点实验室,昆明650500 [2]昆明云内动力股份有限公司,昆明650500

出　　处：《机械强度》2018年第6期1443-1450,共8页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51765025);云南省科技强省计划项目(2015AA024)资助.

摘　　要：以某型非道路增压中冷柴油机为研究对象,应用流-固耦合传热方法,建立了缸盖-冷却液-缸套-缸体耦合传热模型,在对气缸盖火力面和缸套关键点进行温度测试的基础上,应用CFD软件进行了流-固耦合传热分析,研究了缸套在机械载荷、热载荷和联合载荷作用下的变形特征。研究表明:各缸套温度分布呈现明显的三段分布形式,最高温度出现在第一缸缸套顶部内侧;机械载荷作用下的缸套变形量较小,最大值出现在第四缸主推力面顶部内侧;热载荷和耦合载荷作用下的缸套变形都呈现"心"形状,最大变形量均出现在第四缸飞轮端方向的顶部内侧,分别为249.19μm和275.47μm,其中热载荷对缸套综合变形的贡献量最大。Taking the non-road turbocharged inter-cooled diesel engine for research objects,by means of coupled fluid-solid analysis method,established the coupled heat transfer model of Cylinder head-Cooling fluid-Cylinder liner-Cylinder block,did a temperature test of flame face of eylinder head and key points of cylinder liner,studied the deformation of cylinder liner under the mechanical loads,thermal loads and coupled loads.The result show that temperature distribution of eylinder liner is not uniform, the highest temperature located in the top of the first cylinder liner;The deformation is relatively small under mechanical loads and the maximum value appeared in the thrust side of the top of the forth cylinder liner;The deformation is heart-shaped under coupled loads,the maximum value appeared in the top of the forth cylinder liner and close to the direction of flywheel,the thermal loads are predominant.

关 键 词：增压 柴油机 缸套变形 流-固耦合 

分 类 号：U464.132[机械工程—车辆工程] TK422[交通运输工程—载运工具运用工程]