基于导热特性分析的S195柴油机活塞改进设计-《集美大学学报（自然科学版）》

文章信息/Info

Title:: A Improvement Design of S195 Diesel Engine Piston Based on Heat Transfer Characteristics Study

作者:: 林雄萍¹; 2; 钟晓龙²; 袁嘉隆²; 郑捷庆²; (1.集美大学诚毅学院,福建厦门 361021;2. 福建省清洁燃烧与能源高效利用工程技术研究中心,福建厦门 361021 )

Author(s):: LIN Xiong-ping¹; 2; ZHONG Xiao-long²; YUAN Jia-long²; ZHENG Jie-qing²; (1.Mechanical engineering department,Chengyi Institute,Jimei University,Xiamen 361021, China;2.Cleaning Combustion and Energy Utilization Research Center of Fujian Province,Xiamen 361021,China)

Keywords:: piston; 3-D finite element method; temperature field; heat transfer characteristic

摘要:: 为有效减少柴油机活塞的热负荷，延长其使用寿命，分析了其温度场分布特性，将S195柴油机活塞头部由平直形状改进为浅ω型，并应用ANSYS有限元分析软件,采用三维有限元法，计算S195柴油机活塞在热载荷作用下的温度场和换热情况,比较了改进前后两种结构的导热特性.模拟计算结果表明：改进后活塞平直顶面温度最高值均比以前的低（除ω形凹坑的中心凸起处略高30℃左右），同时环槽区与裙部的温度也比以前低.更为重要的是，改进后的活塞顶部的温度与第一、第二环槽的温差进一步拉大，使得改进后的活塞通过环槽处的散热动力大大提升

Abstract:: In order to effectively reduce the heat load of diesel engine piston and extend its life ，the structure of S195 diesel engine piston head was improved from a flat shape to shallow ω-shape from the view point of the analysis of its temperature distribution characteristic.The ANSYS finite element analysis software was applied to calculated the two piston.s three -dimensional temperature fields respectively.It can be found from the simulation results that the temperatures of flat top surface are higher than those of the improved one(apart from the ω-shaped pits Center raised slightly higher at around 30 ℃),the same performance also occurs on the piston ring and the skirt areas.More importantly the temperature between the top surface and the first/second ring slots is widened after the piston structure is improved ，making the heat transfer performance at the ring groove of piston improved