Thermal Characteristic Analysis and Experimental Study of a Spindle-Bearing System

Entropy

Qingchang Tan¹  Li Wu¹ 

[1] College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China;

关键词: spindle-bearing system;    thermo-mechanical coupling model;    frictional heat generation;    preload;    heat transfer;    temperature distribution;   

DOI  :  10.3390/e18070271

来源: DOAJ

【 摘 要 】

In this paper, a thermo-mechanical coupling analysis model of the spindle-bearing system based on Hertz’s contact theory and a point contact non-Newtonian thermal elastohydrodynamic lubrication (EHL) theory are developed. In this model, the effect of preload, centrifugal force, the gyroscopic moment, and the lubrication state of the spindle-bearing system are considered. According to the heat transfer theory, the mathematical model for the temperature field of the spindle system is developed and the effect of the spindle cooling system on the spindle temperature distribution is analyzed. The theoretical simulations and the experimental results indicate that the bearing preload has great effect on the frictional heat generation; the cooling fluid has great effect on the heat balance of the spindle system. If a steady-state heat balance between the friction heat generation and the cooling system cannot be reached, thermally-induced preload will lead to a further increase of the frictional heat generation and then cause the thermal failure of the spindle.

【 授权许可】

Unknown