Thermal Properties Analysis of Compact Motorized Spindle Considering Fluid-Solid Thermal Coupling

2018 2nd International Conference on Advanced Technologies in Manufacturing and Materials Engineering

Cui, Li^1 ; Wang, Qingsheng^1

College of Engineering, Shanghai Polytechnic University, Shanghai, China^1

关键词: Calculation models;    Moving heat sources;    Spindle-bearing system;    Temperature analysis;    Temperature calculation;    Temperature decrease;    Temperature rising;    Thermal characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/389/1/012004/pdf
DOI  :  10.1088/1757-899X/389/1/012004

来源: IOP

【 摘 要 】

A new model for thermal properties analysis of compact motorized spindle bearing system is constructed. Heat generation model of ball bearing and compact spindle are given. Considering fluid-solid thermal coupling, a new model of temperature analysis of compact motorized spindle bearing is constructed by using moving heat sources method. Calculation model considering fluid-solid thermal coupling is given. Based on the model and finite element method, heat generation and temperature rise of a high-speed compact motorized spindle bearing system is studied. Temperature rising analysis have been done under different conditions, results show that temperature decreases when coolant flow becomes faster, preload of bearing decreases. It can be found that the maximum heat generation and temperature rise of the spindle system located on the rotor surface. When fluid-solid thermal coupling effect is considered, temperature rising becomes lower than without coupling, and the difference becomes more obvious with the increase of rotation speed of bearing. Experiment proves the accuracy of temperature calculation results considering fluid-solid thermal coupling effect. Fluid-solid thermal coupling should be considered in the calculation for predicting the thermal characteristics of high speed compact spindle bearing system. The study will provide evidence for analyzing thermal characteristics of high speed compact spindle bearing system.