The behavior of the hydrodynamic journal bearings is now very well known because of the many experimental and numerical studies that have been carried out on the topic. This interest in two-lobe journal bearings is due to the fact that their simplicity, efficiency, and low cost have led to them being widely used in industry. These mechanical components tend to be subjected to numerous startups and stops. During transient periods, direct contact between the journal and bearing induces high friction in the lubricated contact and hence wear of the lining. The aim of this work is, first, to present experimental data obtained on a journal lobed bearing subjected to numerous starts and stops. Then, a comparison is made between the measured bearing performance and numerical results, these being obtained on the assumption that the regime is a thermohydrodynamic one. The wear after more than 2000 cycles was measured and used to generate numerical simulations. The aim here was to compare experimental data with theoretical results. It was observed that hydrodynamic pressure increases, whereas the temperature at the film/bush interface slightly decreases on both the upper and lower lobes. These trends are confirmed by the numerical simulations, with theoretical results being very close to experimental data. The final value for wear was measured, the maximum being found to be located at an angular coordinate of 180deg and reaching nearly 9μm. The present study demonstrates that, for the case studied, while the bearing behavior is clearly affected by wear, the bearing still remains useable and safe.

1.
Duckworth
,
W. E.
, and
Forrester
,
P. B.
, 1957, “
Wear of Lubricated Journal Bearings
,”
Proceedings of the Institution of Mechanical Engineers Conference on Lubrication and Wear
, London, pp.
714
719
.
2.
Dufrane
,
K. F.
,
Kannel
,
J. W.
, and
McCloskey
,
T. H.
, 1983, “
Wear of Steam Turbine Journal Bearings at Low Operating Speeds
,”
J. Lubr. Technol.
0022-2305,
105
, pp.
313
317
.
3.
Hashimoto
,
H.
,
Wada
,
S.
, and
Nojima
,
K.
, 1986, “
Performance Characteristics of Worn Journal Bearings in both Laminar and Turbulent Regime. Part1: Steady-State Characteristics
,”
ASLE Trans.
0569-8197,
29
, pp.
565
571
.
4.
Fillon
,
M.
, and
Bouyer
,
J.
, 2004, “
Thermohydrodynamic Analysis of a Worn Plain Journal Bearing
,”
Tribol. Int.
0301-679X,
37
(
2
), pp.
129
136
.
5.
Tamura
,
K.
,
Ishihara
,
S.
,
Goshima
,
T.
, and
Tachi
,
Y.
, 2004, “
Effect of Cyclic Load and Sliding Speed on the Sliding Wear Characteristics of a Bearing Lined with WJ7 White Metal
,”
Proc. Inst. Mech. Eng., Part J: J. Eng. Tribol.
1350-6501,
218
, pp.
23
31
.
6.
Tachi
,
Y.
,
Ishihara
,
S.
,
Tamura
,
K.
,
Goshima
,
T.
, and
McEvily
,
A. J.
, 2005, “
Predicting Sliding Wear Behaviour of a Tin-based White Metal under Varying Pressure and Speed Conditions
,”
Proc. Inst. Mech. Eng., Part J: J. Eng. Tribol.
1350-6501,
219
, pp.
451
457
.
7.
Pierre
,
I.
,
Bouyer
,
J.
, and
Fillon
,
M.
, 2004, “
Thermohydrodynamic Behavior of Misaligned Plain Journal Bearings—Theoretical and Experimental Approaches
,”
STLE Tribol. Trans.
1040-2004,
47
(
4
), pp.
594
604
.
8.
Elrod
,
H. G.
, 1981, “
A Cavitation Algorithm
,”
J. Lubr. Technol.
0022-2305,
103
, pp.
350
354
.
9.
Mc Coull
,
N.
, and
Walther
,
C.
, 1921, “
Viscosity-Temperature chart
,” Lubrication.
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