Hydrodynamic gas film bearings are widely used for very-high-speed, lightly loaded rotating machinery. In the design of hydrodynamic gas film bearings, it is of cardinal importance to enhance the stiffness of gas films to minimize vibration due to external excitations. Among various types of hydrodynamic gas film thrust bearings, grooved bearings have an advantage of high stiffness and load-carrying capacity, but the stiffness of the bearings strongly depends on groove geometry. Therefore, when the groove geometry is suitably designed, it is expected to considerably improve the stability characteristics of the bearings. However, conventional bearing geometries are based on a fixed logarithmic spiral curve, and there is no literature on how to effectively change the groove geometry to drastically improve the bearing characteristics. In this paper, the entirely new optimum design methodology, in which the groove geometry can be flexibly changed by using the spline function, is presented to maximize the stiffness of gas films for grooved thrust bearings. The effectiveness of the methodology is experimentally verified.

1.
Malanoski
,
S. B.
, and
Pan
,
C. H. T.
, 1965, “
The Static and Dynamic Characteristics of Spiral-Grooved Thrust Bearings
,”
ASME J. Basic Eng.
0021-9223,
87
, pp.
547
558
.
2.
James
,
D. D.
, and
Potter
,
A. F.
, 1967, “
Numerical Analysis of the Gas-Lubricated, Spiral-Groove Thrust Bearing Compressor
,”
ASME J. Lubr. Technol.
0022-2305,
89
, pp.
439
444
.
3.
Lipschity
,
A.
,
Basu
,
P.
, and
Johnson
,
R. P.
, 1991, “
A Bi-Directional Gas Thrust Bearings
,”
STLE Tribol. Trans.
1040-2004,
34
(
1
), pp.
9
16
.
4.
Reddi
,
M. M.
, and
Chu
,
T. Y.
, 1970, “
Finite Element Solution of the Steady State Compressible Lubrication Problem
,”
ASME J. Lubr. Technol.
0022-2305,
92
(
3
), pp.
495
503
.
5.
Kawabata
,
N.
, 1988, “
Operation Characteristics and Analysis of Spiral Groove Bearing
,”
Journal of Japanese Society of Tribologists
,
33
(
5
), pp.
340
344
, in Japanese.
6.
Ichihara
,
J.
, 1988, “
Study on Spiral Groove Hydrodynamic Thrust Air Bearing
,”
Trans. Jpn. Soc. Mech. Eng., Ser. C
0387-5024,
54
(
500
), pp.
943
951
, in Japanese.
7.
Bonneau
,
D.
,
Huitric
,
J.
, and
Tournerie
,
B.
, 1993, “
Finite Element Analysis of Grooved Gas Thrust Bearings and Grooved Gas Face Seals
,”
ASME J. Tribol.
0742-4787,
115
(
3
), pp.
348
354
.
8.
Hughes
,
S. J.
,
Hogg
,
S. I.
, and
Jones
,
T. V.
, 1996, “
Analysis of a Gas-Lubricated Hydrodynamic Thrust Bearing
,”
ASME J. Tribol.
0742-4787,
118
(
3
), pp.
449
456
.
9.
Xue
,
Y.
, and
Stolarski
,
T.
, 1997, “
A Numerical Prediction of the Performance of Gas-Lubricated Spiral Groove Thrust Bearings
,”
Proc. Inst. Mech. Eng., Part J: J. Eng. Tribol.
1350-6501,
211
, pp.
117
128
.
10.
Hashimoto
,
H.
, and
Ochiai
,
M.
, 2007, “
Theoretical Analysis and Optimum Design of High Speed Gas Film Thrust Bearings (Static and Dynamic Characteristic Analysis With Experimental Verifications)
,”
Journal of Advanced Mechanical Design, Systems, and Manufacturing
,
1
(
1
), pp.
102
112
.
11.
Lin
,
G.
, and
Satomi
,
T.
, 1991, “
Optimum Design and Analysis of Characteristics of Spiral Groove Thrust Air Bearing
,”
Trans. Jpn. Soc. Mech. Eng., Ser. C
0387-5024,
57
(
541
), pp.
2971
2977
, in Japanese.
12.
Hashimoto
,
H.
, and
Ochiai
,
M.
, 2007, “
Theoretical Analysis and Optimum Design of High Speed Gas Film Thrust Bearings (Application to Optimum Design Problem)
,”
Journal of Advanced Mechanical Design, Systems, and Manufacturing
,
1
(
3
), pp.
306
318
.
13.
Kawabata
,
N.
, 1987, “
Study on Generalization of Calculations of Lubricant Flow Using Boundary Fitted Coordinate System (Part 1, Basic Equations of DF Method and Case of Incompressible Fluids)
,”
Trans. Jpn. Soc. Mech. Eng.
,
53
(
494
), pp.
2155
2160
, in Japanese.
This content is only available via PDF.
You do not currently have access to this content.