氮化曲轴强度的研究  

A Study of Nitrided Crankshaft Strength

作　　者：佟维[1] 李会[1,2] 吴昌华[1] 

机构地区：[1]大连交通大学交通运输工程学院,辽宁大连116028 [2]中国北车集团大连机车车辆有限公司,辽宁大连116022

出　　处：《大连交通大学学报》2012年第4期21-25,共5页Journal of Dalian Jiaotong University

摘　　要：通过对曲轴材质的试棒的弯曲应变进行测试和计算,求得了表面层的弹性模量,并以内燃机车用16V240ZJB型柴油机为例,对表面氮化和不进行表面处理的两种曲轴单拐,分别进行了精细计算,计算模型中单拐采用壳与块两种单元模拟,表面层用薄壳单元模拟,壳单元边长仅1 mm×1 mm,厚度仅0.2 mm,很好的模拟了表面层.计算求得的单拐应力分布完全符合规律,最大应力产生在主轴颈圆角部位,其值与实测相比误差为6.3%.By the measurement and calculation of bend strain of test sample made of crankshaft material, the elastic modulus of surface layer is obtained. Taking the diesel locomotive engine 16V240ZJB for example, the precise calculations are carried out respectively for the nitrided and surface untreated cranks with the calcula-Tion model composed of solid and shell elements, and the surface layer is simulated with unit shell elements of 1 × 1 square millimetre and 0.2 millimetre thickness. The calculated stress distribution of the crank is com-pletely coincident with theorem. The max stress is produced at the fillet of the main journal, and the difference between the calculated and measured stresses is only 6.3 %.

关 键 词：表面氮化 弹性模量 有限元 曲轴强度 

分 类 号：TH123.3[机械工程—机械设计及理论]