立式辊磨机摇臂磨辊一体化建模和有限元分析

Modeling and Finite Element Analysis on Integrated System of Rocker Arms and Grinding Roll Components in Vertical Roller Mill

摇臂、磨辊是立式辊磨机中承担传动、施压的两大主要部件,对保证辊磨机工作状态、物料粉磨质量起着决定性的作用。依据辊磨机的实际工作状态,基于Pro/E平台建立摇臂磨辊一体化三维模型,通过ANSYS有限元软件对其进行应力和变形情况分析。结果表明,有限元分析中划分网格尺寸需要兼顾计算精度和优化效率;机械结构中大应力和大位移形变并不一定是零部件尺寸不足导致的,优化设计时应优先考虑容易引起应力集中的几何元素。

Rocker arm and grinding roller are two main components in a vertical roller mill.They are responsible for transmitting power and applying pressure,and play a decisive role in ensuring the working state and grinding quality of the roller mill.In this study,according to the actual working condition of the roller mill,the three-dimensional model of integrated rocker arms and grinding roll components was established based on Pro/E.Stress and deformation of the integrated system were analyzed by ANSYS Finite Element Method.The results show that both calculation precision and optimization efficiency need giving consideration to when designing minimal mesh sizes of finite element;high stress and large displacement deformation is not necessarily due to the defective size of the mechanical components,and optimization design should be preferred to the geometric elements of stress concentration.