新型非道路卧式柴油机龙门机体结构的设计与分析  

Design and Analysis of Gantry Type Cylinder Block Structure for New-Type Off-Road Horizontal Diesel Engine

作　　者：雷基林[1] 申立中[1] 毕玉华[1] 贾德文[1] 陈建明 

机构地区：[1]昆明理工大学云南省内燃机重点实验室,昆明650224 [2]云南新天力机械制造有限公司,昆明650300

出　　处：《内燃机工程》2013年第1期51-56,共6页Chinese Internal Combustion Engine Engineering

基　　金：云南省应用基础研究基金资助项目(2009ZC036M);云南省科技创新强省计划(2008AD007)

摘　　要：针对非道路卧式柴油机结构特点,分析了现有卧式柴油机隧道式机体存在的技术问题,自主创新设计开发了卧式柴油机龙门机体结构。结合自由模态试验,建立了机体组件有限元分析模型,计算分析了机体结构刚度和强度状况。研究结果表明:新型卧式柴油机龙门机体结构紧凑、润滑油道短、冷却效果好、铸造和加工方便;其低阶固有频率较高,整体刚性较好,各阶模态固有频率均大于500Hz;在计算的预紧工况、最大扭矩工况下第1缸爆发和第2缸爆发3种情况下机体没有出现很高的应力集中现象和较大的变形,计算得到的安全系数均在1.5以上;其结构刚度和强度满足非道路柴油机使用工况要求。According to the structure features of off-road horizontal diesel engine, a gantry type cylinder block was developed independently on the basis of analyzing existing problems of tunnel type cylinder block. By combination with the free modal test, a finite element analysis model of cylinder block components was established and used to calculate and analyze structure stiffness and strength of the gantry type cylinder block. Results indicate that the new gantry type cylinder block of the horizontal diesel engine is of compact structure and light weight. It has short lubricating passage, high cooling efficiency and easy casting and machining processes. Its low-order natural frequency is higher and overall rigid is good, natural frequencies of all order modals are more than 500Hz. Under the three calculated preloading conditions, i.e. max. torque, 1st and 2nd cylinder combustion, the cylinder block does not show high stress concentration and large deformation situations, calculated safety factor is greater than 1. 5. Its structural rigidity and strength meet actual use requirements for off-road diesel engine.

关 键 词：内燃机 卧式柴油机 龙门机体 结构设计 刚度 强度 

分 类 号：TK422.1[动力工程及工程热物理—动力机械及工程]