高速大功率柴油机曲轴齿轮有限元分析技术研究

根据高速大功率柴油机曲轴齿轮的结构和承载特点，对三维过盈装配有限元模型和齿轮对啮合有限元模型的建模方法进行详细分析和论述，在此基础上对曲轴齿轮过盈联接中的装配预应力和传递扭矩与齿轮内径和过盈量的关系，以及齿轮对动态啮合时的动静载荷和不同脉冲对结构强度的影响作相关理论分析，并用接触有限元方法进行对比分析计算，得到的结论可用于同类斜齿轮的设计和改进。

STUDY ON FINITE ELEMENT ANALYSIS TECHNIQUES OF CRANKSHAFT GEARS IN HIGH SPEED AND HEAVY DUTY DIESEL ENGINE

According to the structural and carrying feature of crankshaft gears in high speed and heavy duty diesel engine,the modeling method, which is used to create the interference fit finite element model and gear pair's engagement finite element model of three dimensions,is detailedly described.On the basis of the models,the relations that are between assembled initial stress,transfer torque and gears inner diameter,magnitude of interference in the crankshaft gear's interference calculation,and the impacts of static-dynamic loads and different impulse width on the structural strength in the gears' dynamical engagement,are theoretically analyzed,and also compared and calculated by using the contact finite element.The conclusions are available for design and improvement of similar helical-gears.