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Shock and Vibration
Volume 2017 (2017), Article ID 5091452, 11 pages
https://doi.org/10.1155/2017/5091452
Research Article

Numerical Simulation and Experimental Study on the Gas-Solid Coupling of the Aerostatic Thrust Bearing with Elastic Equalizing Pressure Groove

Mechanical and Electrical Engineering College, Xi’an University of Technology, Xi’an 710021, China

Correspondence should be addressed to Zhao Xiao-long; nc.ude.utax@gnoloaixoahz

Received 25 April 2017; Revised 21 June 2017; Accepted 20 July 2017; Published 29 August 2017

Academic Editor: Marco Belloli

Copyright © 2017 Zhao Xiao-long et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aiming at the problem of low stiffness of aerostatic bearing, according to the principle of gas-solid coupling, this paper designs a kind of aerostatic thrust bearing with elastic equalizing pressure groove (EEPG) and investigates the effect of elastic equalizing pressure groove (EEPG) on the stiffness of aerostatic bearing. According to the physical model of the bearing, one deduces the deformation control equation of the elastic equalizing pressure groove and the control equation of gas lubrication, using finite difference method to derive the control equations and coupling calculation. The bearing capacity and stiffness of aerostatic bearing with EEPG in different gas film clearance are obtained. The calculation results show that the stiffness increased by 59%. The results of numerical calculation and experimental results have good consistency, proving the gas-solid coupling method can improve the bearing stiffness.