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Specific aspects of hybrid bearings working at high rotational speeds: the influence of the recess pressure pattern

Published online by Cambridge University Press:  16 December 2004

Mathieu Hélène ,
Mihai Arghir  and
Jean Frêne
Mathieu Hélène
Affiliation:
Laboratoire de Mécanique des Solides, UMR CNRS 6610, SP2MI, Bd Marie et Pierre Curie, BP 30179, 86962 Futuroscope Chasseneuil Cedex, France
Mihai Arghir
Affiliation:
Laboratoire de Mécanique des Solides, UMR CNRS 6610, SP2MI, Bd Marie et Pierre Curie, BP 30179, 86962 Futuroscope Chasseneuil Cedex, France
Jean Frêne
Affiliation:
Laboratoire de Mécanique des Solides, UMR CNRS 6610, SP2MI, Bd Marie et Pierre Curie, BP 30179, 86962 Futuroscope Chasseneuil Cedex, France
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Abstract

Hydrostatic bearings working at high rotational speeds are usually designed as hybrid bearings. They benefit of a load carrying capacity at low or zero speed and of a reduced torque at high working regimes. Therefore they are provided with pockets or recesses fed via hydraulic restrictors. Modeling the flow in these pockets and its coupling with thin film in the bearing is not a straightforward task. Comparisons with experimental data have shown that the capacity of correctly predicting the bearing characteristics (mainly the dynamic coefficients) is influenced by the accurate modeling of the pressure pattern in the pockets. The present work presents typical recess pressure patterns and shows the way they can influence on the bearing characteristics.

Keywords

Lubricationhybrid bearingsNavier-Stokespressure patterndynamic characteristicsLubrificationpaliers hybridesNavier-Stokesprofil de pressioncaractéristiques dynamiques
Type
Research Article
Information
Mechanics & Industry , Volume 5 , Issue 6 , November 2004 , pp. 651 - 658
Copyright
© AFM, EDP Sciences, 2004

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References

Launder, B.E., Leschziner, M., Flow in Finite-Width, Thrust Bearings Including Inertial Effects, ASME J. Lubrication Technology (1978) 330–338 CrossRef
D.W. Childs, Turbomachinery Rotordynamics: Phenomena, Modeling and Analysis, Wiley Interscience, New York, 1993
Chaomleffel, J.P., Nicolas, D., Experimental Investigations of Hybrid J. Bearings, Trib. Int. (1985) 253–259
L. San Andres, J. Velthuis, Laminar Flow in a Recess of a Hydrostatic Bearing, STLE Paper No. 91TC3Bd3, STLE/ASME Tribology Conference, October 1991, St. Louis, Missouri
M.J. Braun, M. Dzodzo, Effects of the Feedline and Hydrostatic Pocket Depth on the Flow Pattern and Pressure Distribution, paper No. 94-Trib-27, ASME/STLE Tribology Conference, Maui, Hawaï, October 16–19, 1994
M.J. Braun, M. Dzodzo, S. Lattime, Some qualitative and quantitative aspects of flow in a hydrostatic journal bearing pocket, FED-Vol. 239, Fluid Engineering Division Conference Vol. 4 ASME, 1996, pp. 109–114
M.J. Braun, M. Dzodzo, A Three Dimensional Model for a Hydrostatic Bearing, 32nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference July 1–3, 1996/Lake Buena Vista, FL
Braun, M.J., Dzodzo, M., Three dimentional flow and pressure patterns in a hydrostatic journal bearing pocket, ASME J. Trib. (1996) 711–719
Hirs, G.G., A bulk flow theory for turbulence in lubricant films, ASME J. Lubrication Technology (1973) 146–173 CrossRef
San Andrés, L., Turbulent Hybrid Bearings With Fluid Inertia Effects, ASME J. Trib. (1990) 699–207 CrossRef
Francheck, N.M., Childs, D.W., San Andrés, L., Theoretical and experimental comparisons for rotordynamic coefficients of high-speed, high-pressure, orifice-compensated hybrid bearing, ASME J. Trib. (1995) 285–290 CrossRef
J. Frêne, D. Nicolas, B. Degueurce, D. Berthe, M. Godet, Lubrification hydrodynamique. Paliers et butées, Collection de la Direction des Études et Recherches d'Électricité de France, Éditions Eyrolles, 1990