Mixed lubrication characteristics of hydrostatic thrust bearings are examined experimentally. The effects of the surface roughness, supply pressure, loads, speed of rotation and size of restrictors on the frictional force, leakage-flow rate and power losses are clarified. Introducing the concept of mean pressure based on load-carrying capacity due to asperities, and the ratios of hydrostatic balance and leakage-flow rate, the experimental data can be normalized. Also good agreement is found between theoretical results based on a mixed lubrication model presented in a previous paper and the experiment.

Issue Section:
Research Papers
Topics:
Hydraulic equipment, Hydrostatics, Lubrication, Thrust bearings, Leakage flows, Pressure, Hydrostatic equilibrium, Load bearing capacity, Rotation, Stress, Surface roughness
1.
Bell
R.
, and
Burdekin
M.
,
1969-70
, “
Plain Slideways, First paper, An Investigation into the Steady-State Characteristics of Plain Slideways
,”
Proc. Instn. Mech. Engrs.
, Vol.
184
, Part 1, No.
59
, pp.
1075
–
1087
.
2.
Greenwood
J. A.
, and
Williamson
J. B. P.
,
1966
, “
Contact of Nominally Flat Surfaces
,”
Proceedings of Royal Society, London
, Series A, Vol.
295
, pp.
300
–
319
.
3.
Kazama
T.
, and
Yamaguchi
A.
,
1993
, “
Application of a Mixed Lubrication Model for Hydrostatic Thrust Bearings of Hydraulic Equipment
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
115
, pp.
686
–
691
.
4.
Lebeck
A. O.
,
1987
, “
Parallel Sliding Load Support in the Mixed Friction Regime, Part 1—The Experimental Data
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
109
, pp.
189
–
195
.
5.
Patir
N.
, and
Cheng
H. S.
,
1978
, “
An Average Flow Model for Determining Effects of Three-Dimensional Roughness on Partial Hydrodynamic Lubrication
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
100
, pp.
12
–
17
.
6.
Patir
N.
, and
Cheng
H. S.
,
1979
, “
Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
101
, pp.
220
–
230
.
7.
Soda
N.
, and
Aoki
A.
,
1978
, “
Effects of Bearing Area and Surface Roughness in Fluid and Mixed Lubrication (in Japanese)
,”
Journal of Japan Society of Lubrication Engineers
, Vol.
23
, pp.
654
–
662
.
8.
Takeuchi
A.
,
Sato
M.
, and
Aoki
H.
,
1988
, “
Effect of Speed on Bearing Characteristics in Mixed Lubrication (in Japanese)
,”
Journal of Japan Society of Lubrication Engineers
, Vol.
33
, pp.
62
–
68
.
9.
Yamaguchi
A.
, and
Matsuoka
H.
,
1992
, “
A Mixed Lubrication Model Applicable to Bearing/Seal Parts of Hydraulic Equipment
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
114
, pp.
116
–
121
.
This content is only available via PDF.
Copyright © 1995
 by The American Society of Mechanical Engineers
You do not currently have access to this content.