变速箱试验台主轴系统的热-应力耦合场分析

Thermal-Stress Coupled-Field Analysis of Auto Gearbox Test Platform Spindle System

分析汽车变速箱试验台主轴系统的热源和散热,建立了基于热-应力耦合分析的试验台主轴系统有限元模型,按设计要求与工作实际情况计算出发热率和热交换系数,利用ANSYS的热接触有限元分析方法对主轴系统的温度耦合场进行了分析。分析结果表明,主轴系统的散热结构存在缺陷,达不到散热要求,造成轴承座的形变过大而影响实验精度。针对设计实例,提出改进主轴系统热态特性的措施,并对改进后的结构重新进行有限元分析,在合理的分析结果的基础上对设备进行改进,实际测量发现改进后的主轴系统散热效果良好。研究结果为主轴系统的散热结构设计提供了参考和依据。

The heat source and cooling of auto gearbox test platform spindle system were analyzed, and finite element model （FEM） based on analysis of thermal-stress coupling of the spindle system of the test platform was built. The heat generation rates and the heat transfer coefficient are calculated according to the design requirements and practical work situation. With the finite element method of ANSYS thermal contact, the spindle system＇s temperature c0upled-field was analyzed. The analysis results show that the cooling structure of the spindle system is flawed, which cannot meet the requirement of cooling, so the deformation of the bearing seat is so large that it affects the accuracy of the experiment. Aiming at design examples, the measures of improving the thermal properties of spindle system are proposed, and improved structural is reanalyzed with finite element analysis （FEA）. On the basis of reasonable analysis results, the equipment is improved, and the cooling effect of the improved system is good from actual measurement. The re- search results provide reference and basis for the cooling structural design of spindle system.