A Transient Mixed Lubrication Model of a Rotary Lip Seal with a Rough Shaft

A rotary lip seal, widely used in machines containing rotating shafts, is usually protected from mechanical and thermal damage by a thin film of lubricant under the lip, separating the lip and the shaft surfaces. However, under some transient conditions such as those during startup and shutdown, the...

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Bibliographic Details
Published in:Tribology transactions 2006-10, Vol.49 (4), p.621-634
Main Authors: SHEN, DAWEI, SALANT, RICHARD F.
Format: Article
Language:English
Subjects:
Applied sciences
Elastomeric Seals
Elastomers
Exact sciences and technology
Friction, wear, lubrication
Industrial polymers. Preparations
Lip Seals
Lubricants & lubrication
Lubrication research
Machine components
Mechanical engineering. Machine design
Mechanical properties
Mixed Lubrication
Polymer industry, paints, wood
Rotary Seals
Seals
Seals and gaskets
Surface Roughness
Technology of polymers
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Summary:A rotary lip seal, widely used in machines containing rotating shafts, is usually protected from mechanical and thermal damage by a thin film of lubricant under the lip, separating the lip and the shaft surfaces. However, under some transient conditions such as those during startup and shutdown, the fluid film is not fully established or it breaks down, and the seal operates in the mixed lubrication regime. To simulate such cases, a transient mixed lubrication analysis has been developed. It generates predictions of such seal operating characteristics as load support sharing between hydrodynamic and contact pressure, contact and cavitation area ratio, the reverse pumping rate, and the average film thickness. In most previous numerical simulations of the rotary lip seal, the shaft surface is modeled as perfectly smooth. In the present study, a more realistic shaft surface with asperities is used, and the effect of the shaft surface roughness on the behavior of the seal is investigated. Presented at the STLE Annual Meeting in Calgary, Alberta, Canada May 7-11, 2006 Review led by Luis San Andres
ISSN:1040-2004
1547-397X
DOI:10.1080/10402000600927720