The Open Mechanical Engineering Journal




ISSN: 1874-155X ― Volume 13, 2019

Research on Nonlinear Dynamic Characteristics and Stability of Aerodynamic Bearings


The Open Mechanical Engineering Journal, 2014, 8: 243-250

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.

Electronic publication date 16/9/2014
[DOI: 10.2174/1874155X01408010243]

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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.


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