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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Rotordynamic and Bearing Upgrade of a High-Speed Turbocharger

[+] Author and Article Information
B. C. Pettinato, P. DeChoudhury

Elliott Company, 901 North Fourth Street, Jeannette, PA 15644-1473

J. Eng. Gas Turbines Power 125(1), 95-101 (Dec 27, 2002) (7 pages) doi:10.1115/1.1519273 History: Received December 01, 2000; Revised March 01, 2001; Online December 27, 2002
Copyright © 2003 by ASME
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References

Petrock,  W., and Stewart,  W. A., 1970, “Critical Factors in the Application of Diesel Engines to Rail Traction,” Proc. Inst. Mech. Eng., 184, Part 3, pp. 25–31.
Hoffman,  J. G., 1979, “Crankcase Lubricants for Four-Cycle Railroad and Marine Diesel Engines,” Lubr. Eng., 35, pp. 189–197.
Pratt,  T. N., , 1981, “HVI and MVI Locomotive Diesel Engine Oil—Open Forum,” Lubr. Eng., 37, pp. 577–591.
Brockett,  T. S., Barrett,  L. E., and Allaire,  P. E., 1996, “Thermoelastohydrodynamic Analysis of Fixed Geometry Thrust Bearings Including Runner Deformation,” Tribol. Trans., 39, pp. 555–562.
Lund, J. W., Arwas, E. B., Cheng, H. S., Ng, C. W., and Pan, C. H., 1965, “Rotor-Bearing Dynamics Design Technology, Part III: Design Handbook for Fluid Film Type Bearings,” Technical Report AFAPL-TR-65-45, Aero Propulsion Lab, WPAFB, OH.
DeChoudhury,  P., Zsolcsak,  S. J., and Barth,  E. W., 1976, “Effect of Damping on the Lateral Critical Speeds of Rotor-Bearing Systems,” J. Eng. Ind., 98, pp. 505–513.
Lund,  J. W., and Orcutt,  F. K., 1967, “Calculations and Experiments on the Unbalance Response of a Flexible Rotor,” J. Eng. Ind., 89, pp. 785–796.
Lund,  J. W., 1974, “Stability and Damped Critical Speeds of a Flexible Rotor in Fluid-Film Bearings,” J. Eng. Ind., 96, pp. 509–517.
Garner,  D. R., Lee,  C. S., and Martin,  F. A., 1980, “Stability of Profile Bore Bearings: Influence of Bearing Type Selection,” Tribol. Int., 13, pp. 204–210.
Flack,  R. D., and Lanes,  R. F., 1982, “Effects of Three-Lobe Bearing Geometries on Rigid-Rotor Stability,” ASLE Trans., 25, pp. 221–228.
Schwartz, R., Reichert, B. A., and Chapman, K. S., 1997, “Development of a Turbocharger Test Stand,” Proceedings of the PCRC Gas Machinery Conference, Austin, TX.
American Petroleum Institute Standard 670, 1993, Vibration, Axial-Position, and Bearing Temperature Monitoring Systems, 3rd Ed., American Petroleum Institute, Washington, DC.

Figures

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Cross-sectional layout of the original turbocharger
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Reduction of thrust bearing tapers due to wearing of the lands
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Cross-sectional layout of the modified turbocharger with instrumentation
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Thrust bearing redesign and comparison
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Three-axial-groove journal bearing
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Three-lobe journal bearing
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Critical speed map, modified turbocharger
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Turbine end journal bearing metal temperatures
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Active thrust bearing metal temperatures
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Cascade diagram, original turbocharger with three-axial-groove journal bearings, 17 lpm, nominal inlet viscosity
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Original active thrust bearing after rubbing
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Cascade diagram, modified turbocharger with three-lobe journal bearings, 30 lpm, nominal inlet viscosity

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