Thermal Elastohydrodynamic Model of a Radial Lip Seal—Part I: Analysis and Base Results

A numerical thermal elastohydrodynamic model of a radial lip seal, with a flooded air side, has been constructed. The shaft surface is modeled as perfectly smooth, while the lip microgeometry is modeled as a uniform distribution of asperities with initially circular cross-sections. The asperities ca...

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Bibliographic Details
Published in:Journal of tribology 1999-01, Vol.121 (1), p.1-10
Main Authors: Day, Kevin, Salant, Richard F
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Machine components
Mechanical engineering. Machine design
Seals and gaskets
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Summary:A numerical thermal elastohydrodynamic model of a radial lip seal, with a flooded air side, has been constructed. The shaft surface is modeled as perfectly smooth, while the lip microgeometry is modeled as a uniform distribution of asperities with initially circular cross-sections. The asperities can deform circumferentially as the bulk lip material shears. Both the viscosity of the fluid and the elastic modulus of the lip are temperature dependent. Model predictions include the pressure distribution in the lubricating film under the lip, the film thickness distribution, the cavitation distribution, the pumping rate, and the lip temperature distribution.
ISSN:0742-4787
1528-8897
DOI:10.1115/1.2833803