REVIEW ARTICLE


Research on Nonlinear Dynamic Characteristics and Stability of Aerodynamic Bearings



Jia Chen-Hui*, Du Cai-Feng, Qiu Ming
School of Mechatronics Engineering, Henan University of Science and Technology, Xiyuan Road 48, Box 62, Luoyang, Henan, 471003, China

Article Information


Identifiers and Pagination:

Year: 2014
Volume: 8
First Page: 243
Last Page: 250
Publisher Id: TOMEJ-8-243
DOI: 10.2174/1874155X01408010243

Article History:

Received Date: 25/07/2013
Revision Received Date: 04/08/2014
Acceptance Date: 04/08/2014
Electronic publication date: 16/9/2014
Collection year: 2010

© 2014 Chen-Hui et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Mechatronics Engineering, Henan University of Science and Technology, Xiyuan Road 48, Box 62, Luoyang, Henan, 471003, China; Tel:0086-13523798226; E-mail: xjiachenhui@163.com


Abstract

In order to research the conical spiral groove aerodynamic bearings, the lubrication mathematical model of the bearings was established. The Reynolds equation of the laminar flow condition is used to calculate the partial differential equation of the perturbation pressure with the local finite difference method. Through calculating the stiffness and damping coefficient, the influence of the speed of law and eccentricity ratio on the dynamic characteristic coefficients has been gained. The mathematical model for the stability of the bearing-rotor system is established to study the influence law of speed influence of the law of speed and eccentricity ratio on the stability. The results show that the influence of the bearing's speed and eccentricity on the dynamic characteristics is significant. A reasonable choice of the bearing's speed and eccentricity contributes to improve the dynamic characteristics and the stability of the bearing-rotor system.

Keywords: Aerodynamic bearing, Dynamic stiffness coefficients, Dynamic damping coefficients, Nonlinear dynamic characteristics, Stability, Perturbation Pressure.