Simulation of the Effects of a Plunge Ground Rod on Hydraulic Rod Seal Behavior

A numerical analysis of a reciprocating hydraulic rod seal with a plunge ground rod has been performed. It consists of coupled fluid mechanics, contact mechanics, and deformation analyses. The fluid mechanics analysis consists of a finite volume solution of the Reynolds equation. The deformation is...

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Bibliographic Details
Published in:Tribology transactions 2013-11, Vol.56 (6), p.986-996
Main Authors: Huang, Yuli, Salant, Richard F.
Format: Article
Language:English
Subjects:
Applied sciences
Computational fluid dynamics
Deformation
Drives
EHL
Elastomeric Seals
Exact sciences and technology
Finite element analysis
Fluid mechanics
Lip Seals
Mechanical engineering. Machine design
Polyurethane
Pressure distribution
Reciprocating Seals
Reynolds equation
Rod Seals
Seals
Speed variators, torque converters. Hydraulic drives and controls, pneumatic drives and controls, fluids and components, hydraulic motors, pneumatic motors
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Summary:A numerical analysis of a reciprocating hydraulic rod seal with a plunge ground rod has been performed. It consists of coupled fluid mechanics, contact mechanics, and deformation analyses. The fluid mechanics analysis consists of a finite volume solution of the Reynolds equation. The deformation is computed with a finite element analysis. The contact of the seal asperities with the rod utilizes the Greenwood-Williamson model and the rod surface geometry is treated deterministically. The fluid transport, friction force, contact pressure distribution, and fluid pressure distribution in the sealing zone have been computed for a polyurethane U-cup seal and for a step seal with a polytetrafluoroethylene (PTFE) sealing element and a nitrile energizer. These have been compared with the results for a smooth rod.
ISSN:1040-2004
1547-397X
DOI:10.1080/10402004.2013.807531