摘要
凸轮轴是发动机关键部件,控制着进排气系统的配气相位,凸轮运转时承受着交变载荷,长时间工作易产生疲劳裂纹,裂纹扩展会导致凸轮轴的断裂,造成配气部件的损坏。针对某柴油发动机凸轮轴断裂情况,根据疲劳断裂生长理论,运用实验分析和有限元分析方法,对凸轮轴疲劳断裂成因进行分析,计算出了凸轮轴极限应力和疲劳安全系数,分析了凸轮轴的疲劳安全可靠性。同时发现柴油发动机凸轮轴在制造和设计中存在的问题,提出避免柴油发动机凸轮轴发生疲劳断裂的措施,为设计高质量的凸轮轴提供依据。
The camshaft is a key component of engine,which controls distribution phase of intake and exhaust system,while camshaft running,it bearing alternating load,and it is easy to produce fatigue crack with long time working,and crack propagation can lead to fracture of the camshaft,causing the damage of distribution gas component.It aims at fracture of a diesel engine camshaft,according to fatigue fracture growth theory,using experimental analysis and finite element analysis method,calculated the limit stress and fatigue safety coefficient of camshaft,and analyzed the fatigue safety reliability of the CAM shaft.The cause of the fatigue fracture of the camshaft was analyzed,and the measures which can improve the fatigue property of the diesel engine camshaft was put forward and the evidence for the design of high quality camshaft was provided.
出处
《机械设计与制造》
北大核心
2013年第1期140-142,145,共4页
Machinery Design & Manufacture
基金
浙江省教育厅2012年度科研项目(Y201224281)
浙江省教育厅2010年度科研项目(Y201016099)
关键词
柴油发动机
凸轮轴
疲劳
有限元
Diesel Engine
Camshaft
Fatigue
Finite Element
