To read the full version of this content please select one of the options below:

Oil film shape prediction of hydrostatic thrust bearing under the condition of high speed and heavy load

Xiaodong Yu (Harbin University of Science and Technology, Harbin, China)
Xu Zuo (Harbin University of Science and Technology, Harbin, China)
Chao Liu (Harbin University of Science and Technology, Harbin, China)
Xuhang Zheng (Harbin University of Science and Technology, Harbin, China)
Hang Qu (Harbin University of Science and Technology, Harbin, China)
Tengfei Yuan (Harbin University of Science and Technology, Harbin, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 10 August 2018

Issue publication date: 22 August 2018

Abstract

Purpose

Hydrostatic thrust bearing is a key component of the vertical CNC machining equipment, and often results in friction failure under the working condition of high speed and heavy load. The lubricating oil film becomes thin or breaks because of high speed and heavy load and it affects the high precision and stable operation of the vertical CNC machining equipment; hence, it is an effective way of avoiding friction failure for achieving the oil film shape prediction

Design/methodology/approach

For the hydrostatic thrust bearing with double rectangular cavities, researchers solve the deformation of the friction pairs in hydrostatic bearing by using the computation of hydrodynamics, elasticity theory, finite element method and fluid-thermal-mechanical coupled method. The deformation includes heat deformation and elasticity deformation, the shape of gap oil film is got according to the deformation of the friction pairs in hydrostatic bearing, and gets the shape of gap oil film, and determines the influencing factors and laws of the oil film shape, and achieves the prediction of oil film shape, and ascertains the mechanism of friction failure. An experimental verification is carried out.

Findings

Results show that the deformation of the rotational workbench is upturned along its radial direction under the working condition of high speed and heavy load. However, the deformation of the base is downturned along its radial direction and the deformation law of the gap oil film along the radius direction is estimated; the outer diameter is close but the inner diameter is divergent wedge.

Originality/value

The conclusion can provide a theoretical basis for the oil film control of hydrostatic thrust bearing and improve the stability of vertical CNC machining equipment.

Keywords

Acknowledgements

The financial support for this work was provided by National Natural Science Foundation of China (51375123) and National Natural Science Foundation of Heilongjiang Province (E2016040).

Citation

Yu, X., Zuo, X., Liu, C., Zheng, X., Qu, H. and Yuan, T. (2018), "Oil film shape prediction of hydrostatic thrust bearing under the condition of high speed and heavy load", Industrial Lubrication and Tribology, Vol. 70 No. 7, pp. 1243-1250. https://doi.org/10.1108/ILT-07-2017-0220

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited