An elastohydrodynamic analysis of a rotary lip seal containing microasperities, incorporating both the fluid mechanics of the lubricating film and the elastic behavior of the lip, has been performed numerically. The results indicate that some asperity patterns generate reverse pumping that prevents leakage through the seal. Other asperity patterns are found to generate negative reverse pumping that enhances leakage. In all cases considered, the asperities also hydrodynamically generate sufficiently high pressures to provide load support and maintain the integrity of the film.

1.
Elrod
H. G.
,
1981
, “
A Cavitation Algorithm
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
103
, pp.
350
354
.
2.
Floberg, L., 1964, “Cavitation in Lubricating Oil Films,” Cavitation in Real Liquids, R. Davies, ed., Elsevier, Amsterdam, pp. 138–146.
3.
Gabelli
A.
, and
Poll
G.
,
1992
, “
Formation of Lubricant Film in Rotary Sealing Contacts: Part I-Lubricant Film Modeling
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
114
, pp.
280
289
.
4.
Horve, L., 1987, “A Macroscopic View of the Sealing Phenomenon for Radial Lip Oil Seals,” Proceedings, 11th International Conference on Fluid Sealing, B. S. Nau, ed., BHRA, pp. 710–731.
5.
Horve, L., 1991, “The Correlation of Rotary Shaft Radial Lip Seal Service Reliability and Pumping Ability to Wear Track Roughness and Microasperity Formation,” SAE International Congress and Exposition, Detroit, paper No. 910530.
6.
Horve, L., 1992, “Understanding the Sealing Mechanism of the Radial Lip Seal for Rotating Shafts,” Proceedings, 13th International Conference on Fluid Sealing, B. S. Nau, ed., BHRG, Kluwer Academic Publishers, pp. 5–20.
7.
Jagger, E. T., 1957, “Study of the Lubrication of Synthetic Rubber Rotary Shaft Seals,” Proceedings, Conference on Lubrication and Wear, Inst, of Mech. Eng., pp. 409–415.
8.
Jagger
E. T.
,
1966
, “
Further Studies of the Lubrication of Synthetic Rubber Rotary Shaft Seals
,”
Proceedings, Institution of Mechanical Engineers
, Vol.
181
, Part 1, No.
9
, pp.
191
204
.
9.
Johnston, P. E., 1978, “Using the Fractional Torque of Rotary Shaft Seals to Estimate the Film Parameters and the Elastomer Surfaces Characteristics,” Proceedings, 8th International Conference on Fluid Sealing, B. S. Nau, ed., BHRA.
10.
Kammu¨ller, M., 1986, “Zur Abdichtwirkung von Radial-Wellendichtringen,” Dr.-Ing. Thesis, Universita¨t Stuttgart, Stuttgart.
11.
Kawahara
Y.
,
Abe
M.
, and
Hirabayashi
H.
,
1980
, “
An Analysis of Sealing Characteristics of Oil Seals
,”
ASLE Transactions
, Vol.
23
, pp.
93
102
.
12.
Mu¨ller, H. K., and Ott, G. W., 1984, “Dynamic Sealing Mechanism of Rubber Rotary Shaft Seals,” Proceedings, 10th International Conference on Fluid Sealing, B. S. Nau, ed., BHRA, pp. 451–466.
13.
Mu¨ller, H. K., 1987, “Concepts of Sealing Mechanism of Rubber Lip Type Rotary Shaft Seals,” Proceedings, 11th International Conference on Fluid Sealing, B. S. Nau, ed., BHRA, pp. 698–709.
14.
Nakamura, K., and Kawahara, Y., 1984, “An Investigation of Sealing Properties of Lip Seals Through Observations of Sealing Surfaces Under Dynamic Condition,” Proceedings, 10th International Conference on Fluid Sealing, B. S. Nau, ed., BHRA, pp. 87–105.
15.
Nakamura
K.
,
1987
, “
Sealing Mechanism of Rotary Shaft Lip-Type Seals
,”
Tribology International
, Vol.
20
, pp.
90
101
.
16.
Patankar, S. V., 1980, Numerical Heat Transfer and Fluid Flow, Hemisphere, New York.
17.
Salant
R. F.
, and
Flaherty
A. L.
,
1994
, “
Elastohydrodynamic Analysis of Reverse Pumping in Rotary Lip Seals with Microundulations
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
116
, pp.
56
62
.
18.
Sponagel, S., Kilthau, G., and Spies, K. H., 1987, “Sealing Mechanisms of Lip Seals,” Proceedings, 11th International Conference on Fluid Sealing, B.S. Nau, ed., BHRA, pp. 748–772.
This content is only available via PDF.
You do not currently have access to this content.