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Investigations of the static and dynamic characteristics of the precision hydrostatic spindle with mid-thrust bearing under different loads

Lookup NU author(s): Chenggang Fang, Dr Dehong Huo

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by Sage, 2021.

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Abstract

This paper investigates the static and dynamic characteristics of the precision hydrostatic spindle with a mid-thrust bearing under different working conditions. Firstly, the paper establishes the fluid governing equations of the coupled journal and thrust bearings based on orifice restrictors; and the dynamic and static Reynolds equations are solved using the perturbation and finite difference methods to obtain the steady and transient pressure distribution functions. Then the stiffness and damping characteristics of matrixes of the spindle are obtained by integrating the steady and transient pressure. Furthermore, by establishing the motion equation for the spindle rotor with five degrees of freedom, the quasi-static equilibrium position and stability criterion of the rotor under different working conditions are determined. Finally, the relationships between the dynamic and static characteristics of the spindle and cutting force, rotational speed, and cutting distance are simulated and analyzed. The simulation results show the patterns of variation in performance indices such as stiffness, damping, quasi-static position, and stability of the spindle under different working conditions, which provides important design information to be taken into consideration concerning the precision hydrostatic spindle.


Publication metadata

Author(s): Fang C, You W, Huo D

Publication type: Article

Publication status: Published

Journal: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology

Year: 2021

Pages: Epub ahead of print

Online publication date: 24/06/2021

Acceptance date: 19/05/2021

Date deposited: 27/12/2021

ISSN (print): 1350-6501

ISSN (electronic): 2041-305X

Publisher: Sage

URL: https://doi.org/10.1177/13506501211023618

DOI: 10.1177/13506501211023618


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Funding

Funder referenceFunder name
51635003

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