This paper presents a series of trials of direct detection of the transition process of a squeeze film, from the contacting state into the floating one. The material was initially placed on the surface of a vibrator constituting a squeeze air film. Three electrical trials were performed to certify whether the material could be elevated after the vibrator was excited. When this is done, clearance is expected between the surfaces of the test material and the vibrator. This may be regarded as the equivalent of a change in electrical resistance from almost zero to infinity, with a kind of parallel-plate capacitor being formed. First, detection through DC current was carried out. The experimental result, however, reveals that the resistance never does become infinite, although the equivalent contacting area calculated from this value is very small. Second, detection through DC voltage was performed by terminating the clearance with parallel resistance. The experimental results verify the appearance of the floating state. Third, the average clearance could be detected by regarding it as a parallel-plate type capacitor. Here a Langevin type piezoelectric transducer was used as the vibrator. Through these experimental results an important fact was observed: the waveform of the voltage applied to the transducer is closely related to the movement of the clearance in the time domain.

1.
Elrod
H. G.
, and
Chu
T. Y.
,
1973
, “
Inertia and Energy Effects in the Developing Gas Film Between Two Parallel Flat Plates
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
95
, No.
4
, pp.
524
534
.
2.
Langlois
W. E.
,
1962
, “
Isothermal Squeeze Films
,”
Quarterly of Applied Mathematics
, Vol.
XX
, No.
2
, pp.
131
150
.
3.
Mourelatos
Z. P.
,
1990
, “
Hydrodynamic Analysis of a Slider Gas Bearing Including the Gas Inertia Effect
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
112
, No.
4
, pp.
662
669
.
4.
Mori
A.
,
1988
, “
Fundamentals of Gas Film Lubrication
,”
Lubrication
, Vol.
33
, No.
5
, pp.
324
327
.
5.
Pan
C. H. T.
,
1967
, “
On Asymptotic Analysis of Gaseous Squeeze-Film Bearing
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
89
, No.
3
, pp.
245
253
.
6.
Rohde
S. M.
,
Whicker
D.
and
Browne
A. L.
,
1976
, “
Dynamic Analysis of Elastohydrodynamic Squeeze Films
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
98
, No.
3
, pp.
401
408
.
7.
Saad, M. A., 1985, Compressible Fluid Flow, Prentice-Hall, Englewood Cliffs, NJ.
8.
Salbu
E. O. J.
,
1964
, “
Compressible Squeeze Films and Squeeze Bearings
,”
ASME Journal of Basic Engineering
, Vol.
86
, No.
2
, pp.
355
366
.
9.
Takada
H.
,
Kamigaichi
S.
and
Miura
H.
,
1986
, “
Sealing Effects of Squeeze Air Film
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
108
, No.
4
, pp.
594
597
.
10.
Taylor
G. I.
, and
Saffman
P. G.
,
1957
, “
Effects of Compressibility at Low Reynolds Number
,”
Journal of Aeronautical Science
, Vol.
24
, No.
8
, p.
553
553
.
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