Abstract
A series of experimental results is presented to explore the frictional characteristics of a grease-lubricated journal bearing. Load, grease type, and bushing material are varied to examine their effects on the friction coefficient. The results attest to the existence of distinctive regimes in grease lubrication akin to the oil-lubricated Stribeck curve. A mixed elastohydrodynamic lubrication model for line contacts is employed to estimate the coefficient of friction in mixed lubrication regime. The simulation results capture the basic characteristics of mixed lubrication.
Issue Section:
Technical Papers
1.
Baker
, A. E.
, 1958, “Grease Bleeding—A Factor in Ball bearing Performance
,” NLGI Spokesman
0027-6782, 22
, pp. 271
–277
.2.
Bauer
, W. H.
, Finkelstein
, A. P.
, and Wiberley
, S. E.
, 1960, “Flow Properties of Lithium Stearate-Oil Model Greases as Function of Soap Concentration and Temperature
,” ASLE Trans.
0569-8197, 3
, pp. 215
–224
.3.
Kageyama
, H.
, Machidori
, W.
, and Moriuchi
, T.
, 1984, “Grease Lubrication in Elastohydrodynamic Contacts
,” NLGI Spokesman
0027-6782, 48
(3
), pp. 72
–81
.4.
Pemberton
, J.
, and Cameron
, A.
, 1976, “A Mechanism of Fluid Replenishment in Elastohydrodynamic Contacts
,” Wear
0043-1648, 37
(1
), pp. 185
–190
.5.
Aström
, H.
, Östensen
, J. O.
, and Höglund
, E.
, 1993, “Lubricating Grease Replenishment in an Elastohydrodynamic Point Contact
,” ASME J. Tribol.
0742-4787, 115
(3
), pp. 501
–506
.6.
Cann
, P. M.
, and Spikes
, H. A.
, 1995, “Visualization of Starved Grease and Fluid Lubricant Films
,” Lubricants and Lubrication
, Elsevier Science
, New York
, pp. 161
–166
.7.
Lewis
, W. J.
, 1990, “The Design of High Speed Grease Lubricated Spindles for Machine Tool Production Equipment
,” SAE Trans.
0096-736X, 99
, 1061
–1070
.8.
Bradford
, L. J.
, Barber
, E. M.
, and Muenger
, J. R.
, 1961, “Grease Lubrication Studies with Plain Bearings
,” J. Basic Eng.
0021-9223, 83
, pp. 153
–161
.9.
Horth
, A. C.
, 1968, “Friction Reduction with Greases
,” NLGI Spokesman
0027-6782, 32
, pp. 155
–161
.10.
Godfrey
, D.
, 1964, “Friction of Greases and Grease Components during Boundary Lubrication
,” ASLE Trans.
0569-8197, 7
, pp. 24
–31
.11.
Reinhoudt
, J. P.
, 1970, “A Grease-lubricated Hydrodynamic Bearing System for A Satellite Flywheel
,” J. Am. Soc. Lubr. Eng.
, 26
(3
), pp. 95
–100
.12.
Wikström
, V.
, 1996, “Rolling Bearing Lubrication at Low Temperature
,” Doctoral thesis, Division of Machine Elements, Lulea University of Technology, Lulea, Sweden.13.
Östensen
, J. O.
, 1995, “Lubrication of Elastohydrodynamic Contacts mainly Concerning Low Temperature
,” Doctoral thesis, Division of Machine Elements, Lulea University of Technology, Lulea, Sweden.14.
Westcott
, A. L.
, 1913, “The Lubricating Value of Cup Greases
,” AMD (Am. Soc. Mech. Eng.)
0160-8835, 35
, pp. 1143
–1167
.15.
Cohn
, G.
, and Oren
, J. W.
, 1949, “Film Pressure in Grease-Lubricated Sleeve Bearings
,” Trans. ASME
0097-6822, 71
, pp. 555
–560
.16.
Chakrabarti
, R. K.
, and Harker
, R. J.
, 1960, “Frictional Resistance of a Radially Loaded Journal Bearing with Grease Lubrication
,” Lubr. Eng.
0024-7154, 16
, pp. 274
–280
.17.
Glaeser
, W. A.
, 1977, “Operating Limitations of Heavily Loaded Grease-Lubricated Cast Bronze Bearings
,” ASLE Trans.
0569-8197, 20
(4
), pp. 309
–314
.18.
Stolarski
, T.
, and Olszewski
, O.
, 1976, “An Experimental Study of the Frictional Mechanism in a Journal Bearing Lubricated with Grease Containing Powered PTFE
,” Wear
0043-1648, 39
, pp. 377
–387
.19.
Muijderman
, E. A.
, Remmers
, G.
, and Tielemans
, L. P. M.
, 1980, “Grease-Lubricated Spiral-Groove Bearings
,” Philips Tech. Rev.
0031-7926, 39
(6∕7
), pp. 184
–198
.20.
Lawrence
, K. B.
, 1950, “A Mathematical Evaluation of Pressures in a Grease-Lubricated bearing
,” Trans. ASME
0097-6822, 72
, pp. 429
–443
.21.
Milne
, A. A.
, 1958, “A Theory of Grease Lubrication of A Slider Bearing
,” Proceedings 2nd International Congress on Rheology
, Oxford
, UK
, pp. 427
–436
.22.
Wada
, S.
, and Hayashi
, H.
, 1971, “Hydrodynamic Lubrication of Journal Bearings by Pseudo-Plastic Lubricants-Part 1, Theoretical Studies
,” Bull. JSME
0021-3764, 14
, pp. 268
–278
.23.
Wada
, S.
, and Hayashi
, H.
, 1971, “Hydrodynamic Lubrication of Journal Bearings by Pseudo-Plastic Lubricants-Part 2, Experimental Studies
,” Bull. JSME
0021-3764, 14
, pp. 279
–286
.24.
Wada
, S.
, and Hayashi
, H.
, 1974, “Hydrodynamic Lubrication of Journal Bearings by Pseudo-Plastic Lubricants-Part 3, Application to Journal Bearings
,” Bull. JSME
0021-3764, 17
, pp. 1182
–1191
.25.
Wada
, S.
, and Kawakami
, Y.
, 1986, “Hydrodynamic Lubrication of Porous Journal Bearings with Grease
,” Bull. JSME
0021-3764, 29
(249
), pp. 943
–949
.26.
Hayashi
, H.
, Wada
, S.
, and Nakarai
, N.
, 1977, “Hydrodynamic Lubrication of Journal Bearings by Non-Newtonian Lubricants
,” Bull. JSME
0021-3764, 20
, pp. 224
–231
.27.
Tichy
, J. A.
, 1991, “Hydrodynamic Lubrication Theory for the Bingham Plastic Flow Model
,” J. Rheol.
0148-6055, 35
(4
), pp. 477
–496
.28.
Wen
, S. Z.
, and Ying
, T. N.
, 1988, “A Theoretical and Experimental Study of EHL Lubricated With Grease
,” ASME J. Tribol.
0742-4787, 110
(1
), pp. 38
–43
.29.
Dong
, D.
, 1988, “Theory of Elastohydrodynamic Grease-Lubricated Line Contact Based on a Refined Rheological Model
,” Tribol. Int.
0301-679X, 21
(5
), pp. 261
–267
.30.
Cheng
, J.
, 1994, “Elastohydrodynamic Grease Lubrication Theory and Numerical Solution in Line Contacts
,” Tribol. Trans.
1040-2004, 37
(4
), pp. 711
–718
.31.
Jang
, J. Y.
, and Khonsari
, M. M.
, 1997, “Performance Analysis of Grease-Lubricated Journal Bearings Including Thermal Effects
,” ASME J. Tribol.
0742-4787, 119
, pp. 859
–868
.32.
Lu
, X. B.
, and Khonsari
, M. M.
, 2005, “On the Lift-off Speed in Journal Bearings
,” Tribol. Lett.
1023-8883, 20
(3–4
), pp. 299
–305
.33.
Khonsari
, M. M.
, and Booser
, E. R.
, 2001, Applied Tribology Bearing Design and Lubrication
, Wiley
, New York
.34.
Cann
, P. M.
, 2002, “Friction Properties of Grease in Elastohydrodynamic Lubrication
,” NLGI Spokesman
0027-6782, 66
(1
), pp. 6
–15
.35.
Lu
, X. B.
, Khonsari
, M. M.
, and Gelinck
, E. R. M.
, 2006, “The Stribeck Curve: Experimental Results and Theoretical Prediction
,” ASME J. Tribol.
, to be published.36.
Gelinck
, E. R. M.
, and Schipper
, D. J.
, 2000, “Calculation of Stribeck Curves for Line Contacts
,” Tribol. Int.
0301-679X, 33
(3–4
), pp. 175
–181
.37.
Harris
, T.
, 2001, Rolling Bearing Analysis
, Wiley
, New York
.38.
Aihara
, S.
, and Dowson
, D.
, 1979, “A Study of Film Thickness in Grease-Lubricated Elastohydrodynamic Contacts
,” Proc. Soc. Photo-Opt. Instrum. Eng.
0361-0748, 197
, pp. 104
–115
.39.
Tallian
, T. E.
, 1972, “The Theory of Partial Elastohydrodynamic Contacts
,” Wear
0043-1648, 21
(1
), pp. 49
–101
.40.
Bair
, S.
, and Winer
, W. O.
, 1979, “A Rheological Model for EHL Contacts Based on Primary Laboratory Data
,” ASME J. Lubr. Technol.
0022-2305, 101
(3
), pp. 258
–265
.41.
Khonsari
, M. M.
, and Hua
, D. Y.
, 1994, “Thermal Elastohydrodynamic Analysis Using a Generalized Non-Newtonian Formulation With Application to Bair–Winer Constitutive Equation
,” ASME J. Tribol.
0742-4787, 116
(1
), pp. 37
–45
.42.
Hamrock
, B. J.
, 1991, Fundamentals of Fluid Film Lubrication
, NASA Reference Publication 1255
, NASA
, Washington, D.C.
43.
Raimoindi
, A. A.
, and Szeri
, A. Z.
, 1984, “Journal and Thrust Bearings
,” Handbook of Lubrication
, CRC Press
, Boca Raton, FL
, Vol. 2
, pp. 413
–462
.44.
Fein
, R. S.
, 1997, “High Pressure Viscosity and EHL Pressure-Viscosity Coefficients
,” Tribology Data Handbook
, CRC
, Boca Raton, FL
, pp. 638
–644
.45.
Moes
, H.
, 1992, “Optimum Similarity Analysis with Application to Elastohydrodynamic Lubrication
,” Wear
0043-1648, 159
, pp. 57
–66
.46.
Greenwood
, J. A.
, and Williamson
, J. B. P.
, 1966, “Contact of Nominally Flat Surfaces
,” Proc. R. Soc. London, Ser. A
1364-5021, 295
, pp. 300
–319
.47.
Whitehouse
, D. J.
, and Archard
, J. F.
, 1970, “The Properties of Random Surfaces of Significance in their Contact
,” Proc. R. Soc. London, Ser. A
1364-5021, 316
, pp. 97
–121
.48.
Gelinck
, E. R. M.
, and Schipper
, D. J.
, 1999, “Deformation of Rough Line Contacts
,” ASME J. Tribol.
0742-4787, 121
(3
), pp. 449
–454
.Copyright © 2007
by American Society of Mechanical Engineers
You do not currently have access to this content.
