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research-article

Static and dynamic characteristics of externally pressurized porous gas journal bearing with four degrees-of-freedom

[+] Author and Article Information
Shuyun Jiang

Professor, School of Mechanical Engineering, Southeast University
jiangshy@seu.edu.cn

Shengye Lin

Southeast Road, Jiangning District, Nanjing 211189, China
jiangshy@seu.edu.cn

Chun-dong Xu

School of Mechanical Engineering, Southeast University, 2 Southeast Road, Jiangning District, Nanjing 211189, China
xcdwff10170221@126.com

1Corresponding author.

ASME doi:10.1115/1.4037134 History: Received October 30, 2016; Revised May 24, 2017

Abstract

This paper studies the static and dynamic coefficients of an externally pressurized porous gas journal bearing. The finite difference method is used to solve the Reynolds equation of the bearing to obtain the static load capacity. The linear perturbation method is used to derive the perturbation equations considering 4 degrees of freedom, namely, the translational movements in x and in y directions, and the rotational movements around x and around y directions. The effects of various parameters on the dynamic behaviors of the journal bearing are studied. These parameters include the bearing number, the supply pressure, the feeding parameter, the length-to-diameter ratio, the porosity parameter and the eccentricity ratio. Simulated results prove that the proposed method is valid in estimating the static and dynamic characteristics of a porous gas journal bearing with 4 degrees of freedom.

Copyright (c) 2017 by ASME
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