基于三维有限元分析的曲轴圆角优化设计  

Optimal Design of Fillet in Crankshaft Based on Analysis of 3-D Finite Elements

作　　者：诸葛良[1] 李爱军[1] 王明武[1] 

机构地区：[1]上海交通大学,上海200030

出　　处：《内燃机工程》2002年第2期47-50,共4页Chinese Internal Combustion Engine Engineering

摘　　要：内燃机曲轴轴颈的过渡圆角处是应力高度集中部位,易形成疲劳裂纹源,因此设计者对该部位的几何形状尺寸特别留意。本文的研究对象,是一台由四气缸母型机变形后的三气缸发动机曲轴圆角设计。四气缸母型机的曲轴圆角采用带有沉割槽加滚压的复合工艺加工,由于设备条件的限制,三缸机的试制产品无法实施上述工艺。根据曲轴生产厂家的设备条件和技术能力,拟采用曲轴圆弧过渡。作者以三维有限元应力分析为基础,在不降低曲轴轴颈承压面的前提下,采用优化过渡圆角半径,取得了令人满意的效果。In an internal combustion engine, the transition fillet of crankshaft-necks easily creates stress concentration. Where is also the place to bring fatigue. In this paper, we will study a three-cylinder engine which is reformed from a four-cylinder prototype engine. The manufacturing technique of the crankshaft fillets in four-cylinder engine is settling basin and rolling. With the limit of the facilities, the developing products of three-cylinder engine can't be produced with these manufacturing technique. According to the facilities and technical ability, we will select arc to optimize the transition fillets of crankshaft. Based on the stress analysis of 3-D finite element, we can get satisfied results and needn't reduce the bearing surface of the shaft journal, using optimal transition corner radius.

关 键 词：内燃机 轴颈 圆弧过渡 扭矩 三维有限元分析 曲轴 圆角 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]