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Research Papers: Elastohydrodynamic Lubrication

Elastohydrodynamic Analysis of an Elastomeric Hydraulic Rod Seal During Fully Transient Operation

[+] Author and Article Information
Azam Thatte, Richard F. Salant

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

J. Tribol 131(3), 031501 (May 27, 2009) (11 pages) doi:10.1115/1.3139057 History: Received December 31, 2008; Revised April 10, 2009; Published May 27, 2009

A soft elastohydrodynamic model of a reciprocating elastomeric hydraulic rod seal has been developed. It consists of coupled fluid mechanics, contact mechanics, and deformation analyses. The model has been used to analyze a U-cup lip seal in an injection molding application with a time-varying sealed pressure and rod velocity. Results include the histories of the hydraulic fluid flow rate, fluid transport, mean shear stress on rod, sealing zone length, and friction force on rod, as well as distributions of the fluid pressure, film thickness, and contact pressure.

Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic of rod seal

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Figure 3

Deformed shape of seal for various sealed pressures

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Figure 4

Computational procedure

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Figure 5

Rod velocity versus time

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Figure 6

Sealed pressure versus time

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Figure 7

Flow rate versus time

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Figure 8

Fluid transport versus time

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Fluid pressure distribution, outstroke

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Figure 10

Fluid pressure distribution, instroke

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Figure 11

Film thickness distribution, outstroke

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Figure 12

Film thickness distribution, instroke

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Friction force on rod versus time

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Mean shear stress on rod versus time

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Figure 15

Contact pressure distribution, outstroke

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Contact pressure distribution, instroke

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Figure 17

Sealing zone length versus time

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