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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Performance of a Foil-Magnetic Hybrid Bearing

[+] Author and Article Information
E. E. Swanson, H. Heshmat, J. Walton

Mohawk Innovative Technology, Inc., 1037 Watervliet-Shaker Road, Albany, NY 12205-2033

J. Eng. Gas Turbines Power 124(2), 375-382 (Mar 26, 2002) (8 pages) doi:10.1115/1.1417485 History: Received November 01, 1999; Revised February 01, 2000; Online March 26, 2002
Copyright © 2002 by ASME
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References

Swanson, E. E., Raju, K. V. S., and Kirk, R. G., 1996, “Test Results and Numerical Simulation of an AMB Rotor Drop,” Proc. 6th Int. Conf. on Vibrations in Rotating Machinery, I Mech Eng., UK, pp. 119–131.
Ehrich,  F. F., 1996, “The Dynamic Stability of Rotor/Stator Rubs in Rotating Machinery,” J. Eng. Ind., 90, pp. 1025–1028.
Chen, H. M., Walton, J. F., and Heshmat, H., 1997, “Zero Clearance Auxiliary Bearings for Magnetic Bearing Systems,” ASME Paper No. 97-GT-112.
Chen, H. M., Walton, J. F., and Heshmat, H., 1997, “Test of a Zero Clearance Auxiliary Bearing,” Proceedings of the Mag ’97 Industrial Conference and Exhibition on Magnetic Bearings, pp. 111–119.
Suriano, F. J., Dayton, R. D., and Woessner, F. G., 1983, “Test Experience With Turbine-End Foil Bearing Equipped Gas Turbine Engines,” ASME Paper No. 83-GT-73.
Heshmat, H., Chen, H. M., and Walton, J. F., 1998, “On the Performance of Hybrid Foil-Magnetic Bearings,” ASME Paper No. 98-GT-376.
Heshmat,  H., 1994, “Advancement in the Performance of Aerodynamic Foil Journal Bearings—High Speed and Load Capacity.” ASME J. Tribol., 116, pp. 287–295.
Walton, II, J. F., and Heshmat, H., “Application of Foil Bearings to Turbomachinery Including Vertical Operation,” ASME Paper No. 99-GT-391.
Heshmat,  H., and Ku,  C.-Pr., 1994, “Structural Damping of Self-Acting Compliant Foil Journal Bearings,” ASME J. Tribol., 116, pp. 76–82.
Heshmat,  C. A., and Heshmat,  H., 1995, “An Analysis of Gas-Lubricated, Multileaf Foil Bearings with Backing Springs,” ASME J. Tribol., 117, pp. 437–443.
Heshmat, H., and Hermel, P., 1992, “Compliant Foil Bearing Technology and Their Application to High-Speed Turbomachinery,” 19th Leeds-Lyon Symp., Leeds, UK.
Walton, J. F., and Heshmat, H., 1994, “Compliant Foil Bearings for use in Cryogenic Turbopumps,” NASA CP3232, Vol. 1, pp. 372–381.
Heshmat, H., 1999, “Operation of Foil Bearings Beyond the Bending Critical Mode,” ASME Paper No. 99-TRIB-48.
Swanson, E. E., Walton, J. F., and Heshmat, H., 1999, “A 35,000 RPM Test Rig for Magnetic, Hybrid, and Back-Up Bearings,” ASME Paper No. 99-GT-180.
Swanson, E. E., and Heshmat, H., 2000, “Capabilities of Large Foil Bearings,” ASME Paper 2000-GT-387.

Figures

Grahic Jump Location
Components of foil bearing
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Measured journal sleeve deformation
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Run-up to 30,000 rpm, 355 N load
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Averaged vertical spectrum operating at 25,000 rpm, 355 N load
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Averaged horizontal spectrum operating at 25,000 rpm, 355 N load
Grahic Jump Location
Vertical waterfall for coastdown from 30,000 rpm, 355 N load
Grahic Jump Location
Horizontal waterfall for coastdown from 30,000 rpm, 355 N load
Grahic Jump Location
Typical worst case simulated failure response 5300 N at 22,000 rpm

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