Rotordynamics of Gas-Lubricated Journal Bearing Systems
By: by Krzysztof Czolczynski
Series: Mechanical Engineering Series; Mechanical Engineering Series
Publisher: Springer New York
Published: 1999
Place of publication: New York, NY
Language: eng
Format: [electronic resource] /
Number of pages: 152
ISBN-13: 9781461271765; 9781461215189
Subjects: Engineering; Applied Mechanics
Description: Gas bearings have been used to support rotating parts in a wide range of applications - from magnetic recording heads in computer disk drives to gyroscopes and special machine tools. The advantage of gas bearings is the very low viscosity of air compared to that of most oils used in lubrication. As a result, not only is there much less frictional heat to dissipate, but the bearing remains very nearly isothermal. Gas bearings can thus support rotors spinning at much higher rotational velocities than those lubricated with liquids. This book discusses models for the behavior of gas bearings, particularly of the aspects affecting the stability of the system. It begins with a discussion of the mathematical models, identifying the stiffness and damping coefficients, and describing the behavior of the models in unstable regions. It then turns to apply these results to bearings: static characteristics and stability of various rotor systems and an extensive discussion of air rings.
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Table of contents: title: I. Theory: Mathematical models of gas journal bearings; Identification of stiffness and damping coefficients; Mathematical model of rotor - gas bearing system; title: II. Applications: Gas bearings; Stability of rotor - gas bearing systems; Air rings; Stability of the system rotor - bearing - air rings; title: References; title: Notation; title: Index.