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Theoretical research on mechanical property of rectangular oil pad in hydrostatic thrust bearing based on constant flow

Xibing Li (College of Mechanical and Electronic Engineering, Fujian Agriculture and Forestry University, Fuzhou, China and School of Mechanical Engineering, Qiqihar University, Qiqihar, China)
Tian Cheng (School of Mechanical Engineering, Qiqihar University, Qiqihar, China)
Ming Li (School of Mechanical Engineering, Qiqihar University, Qiqihar, China)
Mingjian Li (School of Mechanical Engineering, Qiqihar University, Qiqihar, China)
Ruren Wu (School of Mechanical Engineering, Qiqihar University, Qiqihar, China)
Yingsi Wan (School of Mechanical Engineering, Qiqihar University, Qiqihar, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 11 April 2016

Abstract

Purpose

This paper aims to research the lubrication performance of large-size rectangular oil pad in hydrostatic thrust bearing for heavy computer numerical control (CNC) vertical lathe.

Design/methodology/approach

The research establishes the mathematical models of velocity, flux and pressure fields, etc., for lubrication performance distribution, and analyzes its load-bearing behavior.

Findings

When hydrostatic thrust bearing’s rotating speed is within ω12, the oil flow generated by plate’s relative motion is greater than that generated by pressure difference and centrifugal force, and in the opposite direction, making it not easy to emit friction heat, so the rotating speed range ω12 should be avoided for bearing.

Originality/value

The research provides powerful theoretical basis for the structure design, operating reliability and practical application of large size rectangular oil pad hydrostatic thrust bearing, and realizing the prediction of its lubrication performance.

Keywords

Acknowledgements

This project is supported by Scientific Research Foundation for the Returned Overseas Chinese Scholars, Heilongjiang Province of China (LC2015016); the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry; and University Key Teacher Foundation of Heilongjiang Province of China (1253G065).

Citation

Li, X., Cheng, T., Li, M., Li, M., Wu, R. and Wan, Y. (2016), "Theoretical research on mechanical property of rectangular oil pad in hydrostatic thrust bearing based on constant flow", Industrial Lubrication and Tribology, Vol. 68 No. 3, pp. 392-403. https://doi.org/10.1108/ILT-10-2015-0149

Publisher

:

Emerald Group Publishing Limited

Copyright © 2016, Emerald Group Publishing Limited