Rotordynamics of Gas-Lubricated Journal Bearing Systems

1. Front Matter

   Pages i-x

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2. Introduction

   1. Introduction

      • Krzysztof Czolczynski

      Pages 1-7

3. Theory

   1. Front Matter

      Pages 9-9

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   2. Mathematical Model of a Gas Journal Bearing

      • Krzysztof Czolczynski

      Pages 11-23

   3. Identification of Stiffness and Damping Coefficients

      • Krzysztof Czolczynski

      Pages 25-48

   4. Mathematical Model of Rotor — Gas Bearing System

      • Krzysztof Czolczynski

      Pages 49-60

4. Applications

   1. Front Matter

      Pages 61-61

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   2. Gas Bearings

      • Krzysztof Czolczynski

      Pages 63-81

   3. Stability of Rotor — Gas Bearing System

      • Krzysztof Czolczynski

      Pages 83-104

   4. Air Rings

      • Krzysztof Czolczynski

      Pages 105-124

   5. Stability of the Rotor — Bearing — Air Rings System (Applications)

      • Krzysztof Czolczynski

      Pages 125-139

5. Back Matter

   Pages 141-153

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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.

• Rotor
• friction
• identification
• rotation
• stability

• Division of Dynamics, Technical University of Lodz, Lodz, Poland

  Krzysztof Czolczynski

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