全封与半封水套及缸体研究  

Investigation of Enclosed And Semi-closed Water Jacket And Cylinder Block

作　　者：梁丽霞 曾小春[1] 魏涛[1] Liang Lixia;Zeng Xiaochun;Wei Tao(JiangLing Motors Co.,Ltd.,Nanchang 330001,Jiangxi,P.R.China)

机构地区：[1]江铃汽车股份有限公司,江西南昌330001

出　　处：《南方农机》2018年第23期262-265,268,共5页

摘　　要：以零部件通用性和降低发动机机油消耗、排放、缸孔变形为出发点,结合发动机动力学、燃烧、流体和有限元分析,对采用半封水套缸体及全封水套缸体发动机进行了研究与分析。通过对两个不同缸体的对比研究分析,了解了不同水套及缸体结构对发动机的水套流场分布、结构刚度、缸孔散热及受热应力情况的影响,能够为后续缸体正向设计提供理论支撑,并为缸体优化提供正确的方向。计算结果表明:两种水套在流场及HTC分布上差别不大,全封水套流动阻力比半封水套略大,全封水套缸体结构刚度较半封水套缸体有所提升,两种缸体的水套、缸孔最高温度相差在5%以内,且均低于200℃,应力均处于较低水平,缸孔变形均小于各阶次评价标准。两种缸体结构在一定条件下可替换使用。For parts commonality and reduce the engine oil consumption,emissions,cylinder deformation,combined with dynamics,combustion,fluid and finite element analysis,study on the engine and cylinder block that used enclosed and semi-closed water jacket.By studying the two different cylinder blocks,understand the influence of different water jacket on water jacket flow distribution,structural stiffness,cylinder deformation and the thermal stress,to provide theoretical support for subsequent cylinder block designing and optimization of cylinder block in the right direction.Results show that two kinds of water jacket have little difference on the flow field and HTC distribution;enclosed water jacket’s flow resistance and structural stiffness is slightly higher than semi-closed water jacket.Maximum temperatures of the two water jackets and the cylinder bore is below 200℃and have a difference within 5%,both stress are at lower levels,cylinder bore deformation is less than the order evaluation standard.Two kinds of cylinder structural can interconvert under certain conditions.

关 键 词：内燃机 缸体 水套结构 缸孔变形 正向设计 

分 类 号：U464.171[机械工程—车辆工程]