某柴油机凸轮轴箱的热-机耦合分析
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摘要
以某机车用6缸直列柴油机凸轮轴箱为研究对象,建立凸轮轴箱和机体的装配接触模型,利用Ansys Workbench平台建立有限元模型,并根据凸轮轴箱的实际受力情况对其施加约束和载荷,进行稳态热分析和热-机耦合分析,得到其在缸头约束、螺栓预紧力、热负荷综合作用下的应力与变形云图,找出最大应力和变形所在位置。结果表明:凸轮轴箱各部位的应力满足材料的强度要求,最大变形出现在凸轮轴箱顶端,最大应力出现在凸轮轴箱右侧弧形板与侧板的端角处,凸轮轴箱设计安全。
Taking the camshaft case of an inline 6-cylinder diesel engine used in some locomotives as the research object, the assembly contact model of camshaft case and engine block is established while the finite element model is built by using ANSYS Workbench. The steady-state thermal analysis and thermo-mechanical coupling analysis are carried out to get the location of the maximum of deformation and stress under the combined action of cylinder head constraint, bolts preload and heat load with the applied constraint and load according to the actual force of the camshaft case. The results show that maximum stress value of each part of the camshaft case can meet the strength requirement of the materials, the maximum deformation and stress present to the top of the camshaft case and the corner between side and curved plate respectively. The safety of the design of camshaft case is demonstrated.
Taking the camshaft case of an inline 6-cylinder diesel engine used in some locomotives as the research object, the assembly contact model of camshaft case and engine block is established while the finite element model is built by using ANSYS Workbench. The steady-state thermal analysis and thermo-mechanical coupling analysis are carried out to get the location of the maximum of deformation and stress under the combined action of cylinder head constraint, bolts preload and heat load with the applied constraint and load according to the actual force of the camshaft case. The results show that maximum stress value of each part of the camshaft case can meet the strength requirement of the materials, the maximum deformation and stress present to the top of the camshaft case and the corner between side and curved plate respectively. The safety of the design of camshaft case is demonstrated.
引文
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[2]张洪艳,贾新颖.浅析凸轮轴结构及凸轮参数化建模[J].内燃机与配件,2018(20):124-125.
[3]宋云.摩托车发动机箱体制造工艺分析[J].机械研究与应用,2013,26(1):107-108.
[4]张敏捷,韩飞.发动机凸轮轴优化设计[J].汽车实用技术,2018(2):60-62.
[5]刘正林.美国EMD机车凸轮轴箱保护壳冲压破裂研究[J].模具制造,2017,17(4):26-30.
[6]闫军朝,李洪昌,胡建平,等.柴油机机体的热-机耦合分析[J].中国农机化学报,2015,36(4):143-147.
[7]丁义峰.8L265柴油机机体强度有限元计算及优化[D].大连:大连理工大学,2015.
[8]梁佳.柴油机机体热机耦合分析与试验研究[D].昆明:昆明理工大学,2012.
[9]李吉亮.国Ⅴ柴油机正向开发中的机体热固耦合有限元分析研究[D].天津:天津大学,2012.
[10]吴凤彪,代彩彩,孙力平.基于ANSYS的柴油机机体的热-机耦合分析[J].煤矿机械,2014,35(5):95-97.
[11]宋树峰,薛冬新,王洪峰,等.某柴油机机体静强度有限元分析[J].内燃机与动力装置,2018,35(2):47-51.
[12]王虎,于彩侠,孙军,等.柴油机机体热-机耦合分析[J].合肥工业大学学报(自然科学版),2013,36(10):1158-1161.
[13]刘建敏,康琦,刘艳斌,等.某柴油机进排气门热-机耦合应力场分析[J].农业装备与车辆工程,2018,56(4):20-26.
[14]郭亮,张翼.柴油机活塞的热机耦合分析[J].河北农机,2015(10):53-54.
[15]陈超,周奇才,江增明,等.某发动机机体热机疲劳及缸孔变形分析[J].机械研究与应用,2015,28(4):12-15.
[16]张俊红,徐喆轩,胡欢,等.热机耦合作用下发动机缸盖结构强度及疲劳研究[J].汽车技术,2018(7):36-42.