It is shown in Part 1 of this work (Stakenborg et al., 1990) that dynamic excitation of a radial lip seal will result in nonuniform clearances, due to viscous and inertial seal material behavior. These clearances are filled with fluid. Due to entrainment effects in a converging part of the clearance, fluid pressures will develop, which are sufficiently high to overcome the radial preload. These fluid pressures are excellently described by short bearing theory. The viscous and inertial effects can lead to a type of full film lubrication which is designated visco-elastohydrodynamic (VEHD) lubrication. VEHD lubrication addresses the (apparent) parallel fluid film lubrication problem in radial lip seals. At present, it is the only macro-hydrodynamic theory that results in calculated fluid film thicknesses, friction torques and leakage rates that are in agreement with experimental data. A novel feature of VEHD lubrication is the increase of frictional torque with decreasing viscosity under conditions of full film lubrication and low viscosity values, hitherto believed to be mixed lubrication.
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October 1990
Research Papers
Visco-Elastohydrodynamic (VEHD) Lubrication in Radial Lip Seals: Part 2—Fluid Film Formation
H. J. van Leeuwen,
H. J. van Leeuwen
Eindhoven University of Technology, Department of Mechanical Engineering, 5600 MB Eindhoven, Netherlands
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M. J. L. Stakenborg
M. J. L. Stakenborg
SDRC, Druivenstraat 3, 4816 KB Breda, Netherlands
Search for other works by this author on:
H. J. van Leeuwen
Eindhoven University of Technology, Department of Mechanical Engineering, 5600 MB Eindhoven, Netherlands
M. J. L. Stakenborg
SDRC, Druivenstraat 3, 4816 KB Breda, Netherlands
J. Tribol. Oct 1990, 112(4): 584-592 (9 pages)
Published Online: October 1, 1990
Article history
Received:
March 31, 1989
Revised:
July 7, 1989
Online:
June 5, 2008
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Citation
van Leeuwen, H. J., and Stakenborg, M. J. L. (October 1, 1990). "Visco-Elastohydrodynamic (VEHD) Lubrication in Radial Lip Seals: Part 2—Fluid Film Formation." ASME. J. Tribol. October 1990; 112(4): 584–592. https://doi.org/10.1115/1.2920302
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