A mixed lubrication model is developed to investigate the lubrication of coupled journal-thrust-bearing systems. The governing equations are mapped into a computational domain with a conformal mapping technique developed in a previous study by Wang et al. (2002). In order to study the influence of the boundary conditions on the performance of the bearing system, either the Reynolds boundary conditions or the JFO’s mass conserving conditions are applied to the governing Reynolds equations. The performance of a typical coupled journal-thrust bearing system is numerically investigated and the effects of viscosity, misalignment angle and feeding scheme are discussed.
Issue Section:
Technical Papers
Keywords:
cavitation,
conformal mapping,
lubrication,
machine bearings,
confined flow,
viscosity,
modelling
1.
Tawfik, M., and Stout, K. J., 1981, “Combined Radial and Thrust Aerostatic Bearings-A Summary,” Paper 13, Proc. 8th International Gas Bearing Symposium, April, BHRA Fluid Engineering, Cranfield, Bedford, England.
2.
Pander
, S. S.
, 1986
, “Analysis of Tapered Land Aerostatic Bearings for Combined Radial and Thrust Loads (Yates’ Configuration)
,” Wear
, 107
, pp. 299
–315
.3.
Zhang
, Q. D.
, 1999
, “Design of A Hybrid Fluid Bearing System for HDD Spindles
,” IEEE Trans. Magn.
, 35
, pp. 821
–826
.4.
Pander, S. S., and Pandit, M. D., 1986, “Analysis of Orifice Compensated Aerostatic Bearings for Combined Radial and Thrust Loads (Yates’ Configuration),” 12th AIMTDR Conference, IIT, Delhi, pp. 28–32.
5.
Tieu
, A. K.
, 1991
, “Hydrodynamic Thrust Bearings: Theory and Experiment
,” ASME J. Tribol.
, 113
, pp. 633
–638
.6.
Zang
, Y.
, and Hatch
, M. R.
, 1995, “Analysis of Coupled Journal and Thrust Hydrodynamic Bearing Using a Finite-Volume Method,” Advances in Information Storage and Processing Systems, conference proceedings, ISPS-Vol. 1, ASME, New York, pp. 71–78.7.
Lie
, Y.
, and Bhat
, R. B.
, 1995
, “Coupled Dynamics of a Rotor-Journal Bearing System Equipped with Thrust Bearings
,” Shock and Vibration
, 2
, pp. 1
–14
.8.
Wang, Y., Wang, Q., and Lin, C., 2002, “Mixed Lubrication of Coupled Journal-thrust Bearing Systems,” Computer Modeling in Engineering & Science, 3, pp. 517–530.
9.
Patir
, N.
, and Cheng
, H. S.
, 1978
, “An Average Flow Model for Determining Effects of Three-Dimensionalized Roughness on Partial Hydrodynamic Lubrication
,” ASME J. Lubr. Technol.
, 100
, pp. 12
–17
.10.
Wu
, C. W.
, and Zheng
, L. Q.
, 1989
, “An Average Reynolds Equation for Partial Film Lubrication with a Contact Factor
,” ASME J. Tribol.
, 111
, pp. 188
–191
.11.
Pinkus
, O.
, and Bupara
, S. S.
, 1979
, “Analysis of Misaligned Grooved Journal Bearing
,” ASME J. Lubr. Technol.
, 101
, pp. 503
–509
.12.
Vijayaraghavan
, D.
, and Keith
, T. G.
, 1989
, “Effect of Cavitation on the Performance of a Grooved Misaligned Journal Bearing
,” Wear
, 134
, pp. 377
–397
.13.
Safar
, Z. S.
, 1984
, “Energy Loss Due to Bearing Misalignment
,” Tribol. Int.
, 17
, pp. 107
–109
.14.
Safar
, Z. S.
, and Riad
, M. S. M.
, 1988
, “Prediction of the Coefficient of Friction of a Misaligned Turbulent Flow Journal Bearing
,” Tribol. Int.
, 21
, pp. 15
–19
.15.
Lee
, S. C.
, and Ren
, N.
, 1996
, “Behavior of Elastic-plastic Rough Surface Contacts as Affected by the Surface Topography, Load and Materials
,” STLE Tribol. Trans.
, 39
, pp. 67
–74
.16.
Jacobson, B. O., and Floberg, L., 1957, “The Finite Journal Bearing Considering Vaporization,” Report No. 190, Chalmers University of Technology, Goteborg, Sweden.
17.
Olsson, K. O., 1965, “Cavitation in Dynamically Loaded Journal Bearings,” Report No. 308, Chalmers University of Technology, Goteborg, Sweden.
18.
Elrod, H. G., and Adams, M. L., 1975, “A Computer Program for Cavitation and Starvation Problems,” Cavitation and Related Phenomena in Lubrication, Mechanical Engineering Publications, New York, pp. 37–42.
19.
Elrod
, H. G.
, 1981
, “A Cavitation Algorithm
,” ASME J. Lubr. Technol.
, 103
, pp. 350
–354
.20.
Brewe
, D. E.
, 1986
, “Theoretical Modeling of the Vapor Cavitation in Dynamically Loaded Journal Bearings
,” ASME J. Tribol.
, 108
, pp. 628
–638
.21.
Vijayraghavan
, D.
, and Keith
, T. G.
, Jr., 1989
, “Development and Evaluation of a Cavitation Algorithm
,” STLE Tribol. Trans.
, 32
, pp. 225
–233
.22.
Kumar
, A.
, and Booker
, J. F.
, 1991
, “A Finite Element Cavitation Algorithm
,” ASME J. Tribol.
, 113
, pp. 276
–286
.23.
Payvar
, P.
, and Salant
, R. F.
, 1992
, “A Computational Method for Cavitation in a Wavy Mechanical Seal
,” ASME J. Tribol.
, 114
, pp. 199
–204
.24.
Nehari, Z., 1975, Conformal Mapping, Dover Publications, New York.
Copyright © 2003
by ASME
You do not currently have access to this content.
