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TECHNICAL PAPERS

Analysis of Gas Lubricated Foil Thrust Bearings Using Coupled Finite Element and Finite Difference Methods

[+] Author and Article Information
Crystal A. Heshmat, David S. Xu, Hooshang Heshmat

Mohawk Innovative Technology, Inc., Albany, NY 12205 e-mail: miti@albany.net

J. Tribol 122(1), 199-204 (Jun 29, 1999) (6 pages) doi:10.1115/1.555343 History: Received February 03, 1999; Revised June 29, 1999
Copyright © 2000 by ASME
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References

Heshmat,  H., Walowit,  J., and Pinkus,  O., 1983, “Analysis of Gas-Lubricated Compliant Thrust Bearings,” ASME J. Lubr. Technol., 105, pp. 638.105, 646–655
Heshmat,  H., and Shapiro,  W., 1984, “Advanced Development of Air-Lubricated Thrust Bearings,” ASLE Lubri. Eng., 40, No. 1, pp. 21–6.
Heshmat, H., 1991, “A Feasibility Study on the Use of Foil Bearing in Cryogenic Turbopumps,” Presented at AIAA/SAE/ASME/ASEE 27th Joint Propulsion Conference, June 24–26, 1991, Sacramento, CA, Paper No. AIAA-91-2103.
Heshmat, H., 1993, “Advancement In The Performance of Aerodynamic Foil Journal Bearings: High Speed and Load Capability,” ASME Paper No. 93-Trib-32, Accepted for Publication by ASME J. Tribol., New Orleans, LA.
Heshmat, H., and Hermel, P., 1993, “Compliant Foil Bearing Technology and Their Application to High Speed Turbomachinery,” The 19th Leeds-Lyon Symposium on Thin Film in Tribology—From Micro Meters to Nano Meters, Leeds, U.K., Sept., 1992, D. Dowson et al. eds., Elsevier Science Publishers B. V., pp. 559–575.
Heshmat, H., 1998, “High Load Capacity Compliant Foil Hydrodynamic Thrust Bearing,” US Patent #5,833,369, Nov. 10, 1998.
Heshmat, H., Chen, H. M., and Walton, J. F., 1998, “On the Performance of Hybrid Foil-Magnetic Bearings,” ASME Paper No. 98-GT-376, June 2–5, 1998, 43rd ASME Gas Turbine and Aeroengine Congress, Stockholm, Sweden.
Ku,  C.-P. R., and Heshmat,  H., 1992, “Compliant Foil Bearing Structural Stiffness Analysis: Part I—Theoretical Modal Including Strip and Variable Bump Foil Geometry,” ASME J. Tribol., 114, pp. 394–400.
Walton, J. F., and Heshmat, H., 1994, “Compliant Foil Bearings For Use In Cryogenic Turbopumps,” Proceedings of Advanced Earth-to-Orbit Propulsion Technology Conference, NASA/MSFC May 17–19, 1994, NASA CP3282 Vol. 1, Sept. 19, 1994, pp. 372–381.
Heshmat,  H., and Ku,  C.-P. R., 1994, “Structural Damping of Self-Acting Compliant Foil Journal Bearings,” ASME J. Tribol., 116, pp. 76–82.
Heshmat, C. A., and Heshmat, H., 1994, “An Analysis of Gas Lubricated, Multi-Leaf Foil Journal Bearings With Backing Springs,” ASME Paper No. 94-Trib-61, Accepted for publication in the ASME J. Tribol., and Presented at the ASME/STLE Tribology Conference, October 16–19, 1994, Lahaina, Hawaii.
Zorzi, E. S., 1976, “Gas-Lubricated Foil Bearing Development for Advanced Turbomachines,” Tech. Report AFAPL-TR-76-114, Vol. I and II, AiResearch Manufacturing Co. of Arizona, Phoenix, AZ.
Castelli,  V., and Pirvics,  J., 1968, “Review of Numerical Methods in Gas Bearing Film Analysis,” ASME J. Lubr. Technol., 90, No. 4.
Structural Research and Analysis Corporation, 1998, “COSMOS/M Manual” (COSMOS/M Software for FEA).

Figures

Grahic Jump Location
Thrust bearing components
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Nomenclature of the thrust bearing
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Compliant surface foil bearing program logic flow chart, including top foil influence
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Compliant surface thrust foil bearing
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Effect of torque on compliant surface thrust foil bearing
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Thrust foil bearing for finite element analysis
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Displacement and deformation result from FEA
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Pressure profile for thrust foil bearing operating at 50 krpm
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Film thickness profile for thrust foil bearing operating at 50 krpm
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Combined stiffness profile for thrust foil bearing operating at 50 krpm
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Comparison of prediction and experimental data

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