Turbocharger assembly and stabilizing journal bearing therefor

Details Turbocharger assembly and stabilizing journal bearing therefor Turbocharger assembly and stabilizing journal bearing therefor

1990-11-27

1992-12-08

Hannon, Thomas R.

Bearings

Rotary bearing

Hydraulic or pneumatic bearing support

384107, 384114, F16C 2700, F16C 3206

Patent

active

051692422

ABSTRACT:
An engine turbocharger, particularly of the two cycle diesel type for railway locomotives and other applications, has a rotor with an overhung compressor supported by a compressor journal bearing and thrust flange combination. The bearing combines a multi (two) lobed offset cylindrical wedge film inner surface with a close clearance squeeze film outer surface that causes the bearing to float laterally in a support member to damp shaft runout while supporting the rotor on load controlling oil wedges. The fixed flange provides thrust control and provides a loose pin connection with the bearing that prevents rotation while permitting its squeeze film damping lateral motion. Particular pressure lubrication provides oil to the bearing interior and exterior adequate for the oil wedge supporting and squeeze film damping functions.

REFERENCES:
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patent: 4527912 (1985-07-01), Klusman
patent: 4602873 (1986-07-01), Izumi et al.
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patent: 5020923 (1991-06-01), Heitz et al.
Gunter, E. J., Barrett, L. E., and Allaire, P. E., "Design and Application of Squeeze Film Dampers for Turbomachinery Stabilization", no date.
Gunter, E. J., Barrett, L. E., and Allaire, P. E., "Design of Nonlinear Squeeze-Film Dampers for Aircraft Engines", Jan. 1977.
Gunter, E. J., Li, D. F., and Barrett, L. E., "Unbalance Response of a Two Spool Gas Turbine Engine with Squeeze Film Bearings", Jan. 1981.
Gunter, E. J., "Rotor-Bearing Stability", no date.
Allaire, P. E., and Flack, R. D., "Design of Journal Bearings for Rotating Machinery", Dec. 1981.
Criqui, A. F., "Advancements in Centrifugal Gas Compressor Stability", no date.
Salamone, D. J., "Introduction to Hydrodynamic Journal Bearings", no date.
Salamone, D. J., "Journal Bearing Design Types and Their Applications to Turbomachinery", no date.
Hylton, P. D., Klusman, S. A., and Trippet, R. J., "Optimization of Supercritical Rotor System for the T406 Engine", 1988.
San Andres, L. A., and Vance, J. M., "Experimental Measurement of the Dynamic Pressure Distribution in a Squeeze Film Bearing Damper Executing Circular Centered Orbits", no date.
Goodwin, M. J., and Roach, M. P., "Vibration Control in Rotating Machinery Using Variable Dynamic Stiffness Squeeze-Films", Aug. 1985.

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