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Theoretical research on sector oil-pads’ mechanical property 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: 10 July 2017

Abstract

Purpose

The purpose of this study with the rapid development of the heavy/large mechanical equipment, the heavy computer numerical control (CNC) vertical lathe has become the ideal processing equipment for the parts of those mechanical equipments. The main factor which affects the machining quality and efficiency of heavy CNC vertical lathe is the mechanical properties of the hydrostatic thrust bearing.

Design/methodology/approach

This paper did the research based on the large size sector oil pad’s lubrication performance of the hydrostatic thrust bearing in the heavy/large equipments, establishing the lubrication performance distribution mathematical model of the velocity field, flow field, pressure field and so on, analyzing the bearing behavior of the large size sector oil pad.

Findings

The results show that the oil flow generated by the plate relative motion will be greater than that generated by the pressure difference in area B, with the rotational speed’s increasing of the hydrostatic thrust bearing, and the direction is opposite. The oil flow generated by the centrifugal force will be greater than that generated by the pressure difference in area C, with the rotational speed’s increasing of the hydrostatic thrust bearing, and the direction is opposite. When the rotational speed of the hydrostatic thrust bearing is too high, the friction heat will be not easy to be sent out. The bearing rotating speed should be lower than the comparatively smaller one of ω1 and ω2, which can help avoid the rise of too high temperature.

Originality/value

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

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. (2017), "Theoretical research on sector oil-pads’ mechanical property in hydrostatic thrust bearing based on constant flow", Industrial Lubrication and Tribology, Vol. 69 No. 4, pp. 491-506. https://doi.org/10.1108/ILT-03-2016-0060

Publisher

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Emerald Publishing Limited

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