曲轴扭转疲劳断裂分析  

Analysis of Fatigue and Crack of Crankshaft

作　　者：邵诗波 李学鹏[2] 

机构地区：[1]天润曲轴股份有限公司,山东文登264400 [2]济南鲍德汽车运输有限公司,山东济南250101

出　　处：《内燃机与动力装置》2010年第5期52-54,共3页Internal Combustion Engine & Powerplant

摘　　要：发动机曲轴在进行扭转疲劳试验过程中出现非正常疲劳裂纹,裂纹未从应力最集中的油孔处起源,造成曲轴扭转疲劳强度达不到设计要求。分析认为造成曲轴非正常扭转断裂的原因是油孔内壁存在加工沟槽,通过钻完油孔后采用旋转锉打磨,提高了曲轴的扭转疲劳强度。During fatigue test of crankshaft,some cracks occur,but do not appear around the oil holes with strong stress,so the torque fatigue strength fails to meet the designed demand.It is founded the abnornal crack in the crankshaft is can used by the groove machined inside the oil hole wall.Grinding to the the finished oil hole is adapted and finally the torque fatigue strength has been improved.

关 键 词：曲轴 扭转疲劳 裂纹 

分 类 号：TK407[动力工程及工程热物理—动力机械及工程]