In general, most analyses of radial lip seal behavior assume a static deformation state in the seal lip. Nevertheless, a dynamic excitation of the seal lip always occurs in practice, due to unroundness of the shaft or motions of the shaft center. In this first part of a two part paper the influence of dynamic excitation on the occurrence of clearances in a dry seal-shaft contact is studied, taking into account viscoelasticity and inertia of the seal material. The ultimate goal is to determine whether viscoelastic seal behavior can result in a continuous fluid film or not. First, attention is paid to the mechanical behavior of synthetic rubber under an oscillating load. The seal elastomer shows a glass transition, resulting in a strong increase in stiffness with frequency. Next, a FEM analysis of the seal-shaft contact under dynamic conditions is presented. The steady-state response of the seal is represented by a transfer function approach. It is shown that clearances develop due to viscous and inertial seal material behavior. In practice, these clearances are filled with fluid. Due to entrainment and squeeze effects a fluid film is generated. This phenomenon is designated visco-elastohydrodynamic (VEHD) lubrication, and is subject of Part 2.
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October 1990
Research Papers
Visco-Elastohydrodynamic (VEHD) Lubrication in Radial Lip Seals: Part 1—Steady-State Dynamic Viscoelastic Seal Behavior Available to Purchase
M. J. L. Stakenborg,
M. J. L. Stakenborg
SDRC, Druivenstraat 3, 4816 KB Breda, Netherlands
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H. J. van Leeuwen,
H. J. van Leeuwen
Eindhoven University of Technology, Department of Mechanical Engineering, 5600 MB Eindhoven, Netherlands
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E. A. M. ten Hagen
E. A. M. ten Hagen
Vredestein Research & Development, 7000 AA Doetinchem, Netherlands
Search for other works by this author on:
M. J. L. Stakenborg
SDRC, Druivenstraat 3, 4816 KB Breda, Netherlands
H. J. van Leeuwen
Eindhoven University of Technology, Department of Mechanical Engineering, 5600 MB Eindhoven, Netherlands
E. A. M. ten Hagen
Vredestein Research & Development, 7000 AA Doetinchem, Netherlands
J. Tribol. Oct 1990, 112(4): 578-583 (6 pages)
Published Online: October 1, 1990
Article history
Received:
March 31, 1989
Revised:
July 7, 1989
Online:
June 5, 2008
Connected Content
A companion article has been published:
Visco-Elastohydrodynamic (VEHD) Lubrication in Radial Lip Seals: Part 2—Fluid Film Formation
Citation
Stakenborg, M. J. L., van Leeuwen, H. J., and ten Hagen, E. A. M. (October 1, 1990). "Visco-Elastohydrodynamic (VEHD) Lubrication in Radial Lip Seals: Part 1—Steady-State Dynamic Viscoelastic Seal Behavior." ASME. J. Tribol. October 1990; 112(4): 578–583. https://doi.org/10.1115/1.2920301
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