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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

On the Performance of Hybrid Foil-Magnetic Bearings

[+] Author and Article Information
H. Heshmat, H. Ming Chen, J. F. Walton

Mohawk Innovative Technology, Inc., 1037 Watervliet-Shaker Road, Albany, NY 12205

J. Eng. Gas Turbines Power 122(1), 73-81 (Oct 20, 1999) (9 pages) doi:10.1115/1.483178 History: Received March 22, 1998; Revised October 20, 1999
Copyright © 2000 by ASME
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References

Figures

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Schematic of hybrid foil magnetic bearing concept
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Foil bearing assembly and nomenclature
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Foil bump strip configuration and nomenclature
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Program flow chart including top foil influence
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Film thickness, deflection, and pressure
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Pressure profile applied to top foil
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Top smooth foil influence factors
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Location of minimum film thickness
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Load capacity versus eccentricity ratio
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Stiffness Kxx versus eccentricity ratio
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Stiffness Kyx versus eccentricity ratio
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Stiffness Kxy versus eccentricity ratio
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Stiffness Kyy versus eccentricity ratio
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Hybrid foil/magnetic bearing coordinate system
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Hybrid bearing stiffness
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Foil-magnetic bearing natural frequencies adjusting the PID gains

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