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TECHNICAL PAPERS

Effects of Misalignment on Turbulent Flow Hybrid Thrust Bearings

[+] Author and Article Information
Luis San Andrés

Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843-3123e-mail: Lsanandres@mengr.tamu.edu

J. Tribol 124(1), 212-219 (May 03, 2001) (8 pages) doi:10.1115/1.1400997 History: Received February 06, 2001; Revised May 03, 2001
Copyright © 2002 by ASME
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References

San Andrés,  L., 1995, “Thermohydrodynamic Analysis of Fluid Film Bearings for Cryogenic Applications,” AIAA Journal of Propulsion and Power,11, pp. 964–972.
San Andrés,  L., 1993, “The Effect of Journal Misalignment on the Operation of a Turbulent Hydrostatic Bearing,” ASME J. Tribol., 115, pp. 355–363.
San Andrés,  L., and Childs,  D., 1997, “Angled Injection—Hydrostatic Bearings, Analysis and Comparison to Test Results,” ASME J. Tribol., 119, pp. 179–187.
San Andrés,  L., 2000, “Bulk-Flow Analysis of Hybrid Thrust Bearings for Process Fluid Applications,” ASME J. Tribol., 122, pp. 170–180.
Mittwollen, N., Hegel, H., and Glienicke, J., 1990, “Effect of Hydrodynamic Thrust Bearigs on Lateral Shaft Vibrations,” ASME Paper 90-Trib-63.
Pinkus,  O., and Lund,  J. K., 1981, “Centrifugal Effects in Thrust Bearings Under Laminar Conditions,” ASME J. Lubr. Technol., 103, pp. 126–136.
Jeng,  M. C., and Szeri,  A. Z., 1986, “A Thermohydrodynamic Solution of Pivoted Thrust Pads, III: Linearized Force Coefficients,” ASME J. Tribol., 108, pp. 214–218.
Someya,  T., and Fukuda,  M., 1972, “Analysis and Experimental Verification of Dynamic Characteristics of Oil Film Thrust Bearings,” Bulletin of the JSME,15, pp. 1004–1015.
Green,  I., and Etsion,  I., 1985, “Stability Threshold and Steady-State Response of Noncontacting Coned-Face Seals,” ASLE Trans., 8, pp. 449–460.
Hirs,  G. G., 1973, “A Bulk-Flow Theory for Turbulence in Lubricant Films,” ASME J. Lubr. Technol., 94, pp. 137–146.
San Andrés, L., 2000, “Computational Analysis of Misaligned Hybrid Thrust Bearings for Advanced Cryogenic Turbo Pumps,” final progress report to NASA MSFC, Texas A&M University, December-College Station, TX.
Childs, D., 1993, Turbomachinery Rotordynamics, John Wiley Publishers, New York.
Launder,  B. E., and Leschziner,  M., 1978, “Flow in Finite-Width Thrust Bearings Including Inertial Effects: 2—Turbulent Flow,” ASME J. Lubr. Technol., 100, pp. 339–345.
Van Doormaal,  J. P., and Raithby,  G. D., 1984, “Enhancements of the SIMPLE Method for Predicting Incompressible Fluid Flows,” Numer. Heat Transfer, 7, pp. 147–163.

Figures

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Geometry of a hydrostatic/hydrodynamic thrust bearing
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Depiction of shaft collar with angular misalignments
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Operating clearance, recess pressure ratio, and axial force coefficients (KZZ,CZZ) versus axial load for statically aligned bearing
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Moment force coefficients (Kϕxϕx,Kϕxϕy,Cϕxϕx,Cϕxϕy) and whirl ratio versus axial load for statically aligned bearing
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Minimum and maximum film and recess pressures versus shaft collar static misalignment angle (−ϕXRout/C)
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Mass flow rates through bearing inner and outer radii and recess flow rate versus shaft collar static misalignment angle (−ϕXRout/C)
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Axial load (FZ), drag torque (To) and restoring moments (MX,MY) versus shaft collar static misalignment angle (−ϕXRout/C)
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Synchronous (force) stiffness coefficients versus shaft collar static misalignment angle (−ϕXRout/C)
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Force damping coefficients versus shaft collar static misalignment angle (−ϕXRout/C)
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Synchronous moment stiffness coefficients versus shaft collar static misalignment angle (−ϕXRout/C)
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Moment damping coefficients versus shaft collar static misalignment angle (−ϕXRout/C)

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