The development of new machines capable of running at high loads and speeds is an important industrial requirement, which demands that the performance envelope of the support systems for these machines be extended. Conventional full cylindrical fluid film bearings may present instability problems at higher speeds and loads, which has been countered by the use of different bearing bore shapes. In this paper, the performance characteristics of a novel fluid film bearing, comprising of a number of adjustable bearing elements is presented. Experiments have been performed to measure the static characteristics of the novel bearing with different radial and tilt adjustments of the bearing elements. The test bearing has an L/D ratio of 0.53 and was run at 2000, 5000, and 7000 rpm. The load on the bearing was varied from 0 to 600 N. Eccentricity, attitude angle, temperature of oil; power absorbed; and stability are measured. Experimental results are compared with those for a conventional axial groove plain cylindrical bearing having the same L/D ratio and run under similar conditions. Test results indicate that the novel bearing is very stable at zero loads and at 8800 rpm. Typical results obtained are presented. A few of the attributes and features of the novel bearing are also presented.

References

References
1.
Akkok
,
M.
, and
Ettles
,
C. M.
,
1980
, “
The Effect of Grooving and Bore Shape on the Stability of Journal Bearings
,”
ASLE Trans.
,
23
(
4
), pp.
431
441
.
2.
Schuller
,
F. T.
,
1975
, “
Effect of Number of Lobes and Length-Diameter Ratio on the Stability of Tilted-Lobe Hydrodynamic Journal Bearings at Zero Load
,” NASA Lewis Research Center, Cleveland, OH, NASA Technical Report No.
TN-D-7902
.
3.
Schuller
,
F. T.
,
1977
, “
Stability Experiments With Hydrodynamic-Tilted Lobe Journal Bearings of Various Number of Lobes and Length-to-Diameter Ratios
,”
ASLE Trans.
,
20
(
4
), pp.
271
281
.
4.
Malik
,
M.
,
Chandra
,
M.
, and
Sinhasan
,
R.
,
1981
, “
Performance Characteristics of Tilted Three-Lobe Journal Bearing Configurations
,”
Tribol. Int.
,
14
(
6
), pp.
345
350
.
5.
Malik
,
M.
,
Chandra
,
M.
, and
Sinhasan
,
R.
,
1981
, “
Design Data for Three-Lobe Bearings
,”
ASLE Trans.
,
24
(
3
), pp.
345
353
.
6.
Malik
,
M.
,
1983
, “
The Analysis of Symmetric and Tilted Four-Lobed Journal Bearing Configurations
,”
ASLE Trans.
,
26
(
2
), pp.
264
269
.
7.
Soni
,
Z.
,
Sinhasan
,
R.
, and
Singh
,
D. V.
,
1981
, “
Performance Characteristics of Noncircular Bearings in Laminar and Turbulent Flow Regimes
,”
ASLE Trans.
,
24
(
1
), pp.
29
41
.
8.
Martin
,
J. K.
, and
Parkins
,
D. W.
,
1995
, “
Fluid Film Bearings
,” International (PCT) Patent No. WO95/29346.
9.
Martin
,
J. K.
,
1999
, “
A Mathematical Model and Numerical Solution Technique for a Novel Adjustable Hydrodynamic Bearing
,”
Int. J. Numer. Methods Fluids
,
30
(
7
), pp.
845
864
.
10.
Martin
,
J. K.
,
2002
, “
Extended Expansion of the Reynolds Equation
,”
Proc. Inst. Mech. Eng., Part J
,
216
(
1
), pp.
49
51
.
11.
Martin
,
J. K.
, and
Parkins
,
D. W.
,
2002
, “
Theoretical Studies of Continuously Adjustable Hydrodynamic Fluid Film Bearing
,”
ASME J. Tribol.
,
124
(
1
), pp.
203
211
.
12.
Martin
,
J. K.
, and
Parkins
,
D. W.
,
2001
, “
Testing of a Large Adjustable Hydrodynamic Journal Bearing
,”
Tribol. Trans.
,
44
(
4
), pp.
559
566
.
13.
Martin
,
J. K.
,
2004
, “
Measuring the Performance of a Novel Fluid Film Bearing Supporting a Rotor on a Stationary Shaft, by Non-Contacting Means
,”
Proc. Inst. Mech. Eng., Part K
,
218
(
3
), pp.
143
151
.
14.
Martin
,
J. K.
,
2004
, “
Measured Stiffness and Displacement Coefficients of a Stationary Rotor Hydrostatic Bearing
,”
Tribol. Int.
,
37
(
10
), pp.
809
816
.
15.
Martin
,
J. K.
,
2008
, “
Innovative Bearings to Improve Performance and Efficiency in Industry
,”
Int. J. Perform. Eng.
,
4
(
4
), pp.
345
356
.
16.
Martin
,
J. K.
,
2011
, “
Improved Performance of Hydrodynamic Bearings by Proactive Adjustment
,”
Mech. Ind.
,
12
(
1
), pp.
17
24
.
17.
Shenoy
,
B. S.
, and
Pai
,
R.
,
2009
, “
Steady State Performance Characteristics of Single Pad Externally Adjustable Fluid Film Bearing in the Laminar and Turbulent Regimes
,”
ASME J. Tribol.
,
131
(
2
), p.
021701
.
18.
Shenoy
,
B. S.
, and
Pai
,
R.
,
2009
, “
Theoretical Investigations on the Performance of an Hydrodynamic Externally Adjustable Fluid Film Bearing Including Misalignment and Turbulence Effects
,”
Tribol. Int.
,
42
(
7
), pp.
1088
1100
.
19.
Shenoy
,
B. S.
, and
Pai
,
R.
,
2009
, “
Performance Evaluation of a Single-Pad, Externally-Adjustable Fluid Film Bearing
,”
Australian J. Mech. Eng.
,
7
(
2
), pp.
125
135
.
20.
Shenoy
,
B. S.
, and
Pai
,
R.
,
2010
, “
Stability Characteristics of an Externally Adjustable Fluid Film Bearing in the Laminar and Turbulent Regimes
,”
Tribol. Int.
,
43
(
9
), pp.
1751
1759
.
21.
Shenoy
,
B. S.
, and
Pai
,
R.
,
2011
, “
Dynamic Characteristics of a Single Pad Externally Adjustable Fluid Film Bearing
,”
Ind. Lubr. Tribol.
,
63
(
3
), pp.
146
151
.
22.
Shenoy
,
B. S.
, and
Pai
,
R.
,
2011
, “
Effect of Turbulence on the Static Performance of a Misaligned Externally Adjustable Fluid Film Bearing Lubricated With Couple Stress Fluids
,”
Tribol. Int.
,
44
(
12
), pp.
1774
1781
.
23.
Krodkiewski
,
J. M.
, and
Sun
,
L.
,
1998
, “
Modelling of Multi-Bearing Rotor Systems Incorporating an Active Journal Bearing
,”
J. Sound Vib.
,
210
(
2
), pp.
215
229
.
24.
Krodkiewski
,
J. M.
,
Cen
,
Y.
, and
Sun
,
L.
,
1997
, “
Improvement of Stability of Rotor System by Introducing a Hydraulic Damper Into an Active Journal Bearing
,”
Int. J. Rotating Mach.
,
3
(
1
), pp.
45
52
.
25.
Sun
,
L.
, and
Krodkiewski
,
J. M.
,
2000
, “
Experimental Investigation of Dynamic Properties of an Active Journal Bearing
,”
J. Sound Vib.
,
230
(
5
), pp.
1103
1117
.
26.
Chasalevris
,
A.
, and
Dohnal
,
F.
,
2012
, “
A Journal Bearing With Variable Geometry for the Reduction of the Maximum Amplitude During Passage Through Resonance
,”
ASME J. Vib. Acoust.
,
134
(
6
), p.
061005
.
27.
Chasalevris
,
A.
, and
Dohnal
,
F.
,
2014
, “
Vibration Quenching in a Large Scale Rotor-Bearing System Using Journal Bearings With Variable Geometry
,”
J. Sound Vib.
,
333
(
7
), pp.
2087
2099
.
28.
Dohnal
,
F.
,
Pfau
,
B.
, and
Chasalevris
,
A.
,
2015
, “
Analytical Predictions of a Flexible Rotor in Journal Bearings With Adjustable Geometry to Suppress Bearing Induced Instabilities
,”
13th International Conference in Dynamic Systems Theory and Applications
(
DSTA
), Łódź, Poland, Dec. 11–14, pp. 149–160.
29.
Chasalevris
,
A.
, and
Dohnal
,
F.
,
2015
, “
A Journal Bearing With Variable Geometry for the Suppression of Vibrations in Rotating Shafts: Simulation, Design, Construction and Experiment
,”
Mech. Syst. Signal Process.
,
52–53
, pp.
506
528
.
30.
Pfau
,
B.
,
Rieken
,
M.
, and
Markert
,
R.
,
2015
, “
Numerische Untersuchungen Eines Verstellbaren Gleitlagers Zur Unterdruckung Von Instabilitaten Mittels Parameter-Antiresonanzen
,”
First IFToMM DA-CH Conference
, Dortmund, Germany, pp 1–9.
You do not currently have access to this content.