A numerical analysis is conducted to investigate the elastohydrodynamic effect of deterministic microasperities on the shaft of a lip seal. Various geometries of microasperities (triangular, square, hexagonal, and circular) are put into a unit cell and are investigated using Reynolds equation. For each shape, the area fraction of the microasperity is varied between 0.2 and 0.8, and the asperity height is varied between and . The calculation for load capacity and friction coefficient indicates that there are values for asperity height, where the load capacity and friction coefficient are optimized. These optimum heights were reached at . Although the lip seal surface is considered to be smooth, reverse pumping can still be obtained using an oriented triangular design. The Couette flow rate for this asperity showed lubricant is reverted back toward the seal side 2.6 times more than using a conventional lip seal. The addition of microasperities to the shaft surface shows significant improvement in lubrication characteristics for the lip seal in the form of a simultaneous reduction in friction coefficient and increase in the reverse pumping rate.
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October 2007
Technical Papers
Soft Elastohydrodynamic Analysis of Radial Lip Seals With Deterministic Microasperities on the Shaft
Philip C. Hadinata,
Philip C. Hadinata
Bearings and Seals Laboratory,
e-mail: pchadi0@engr.uky.edu
University of Kentucky
, 151 RGAN Building, Lexington, Kentucky 40506-0503
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Lyndon Scott Stephens
Lyndon Scott Stephens
Bearings and Seals Laboratory,
University of Kentucky
, 151 RGAN Building, Lexington, Kentucky 40506-0503
Search for other works by this author on:
Philip C. Hadinata
Bearings and Seals Laboratory,
University of Kentucky
, 151 RGAN Building, Lexington, Kentucky 40506-0503e-mail: pchadi0@engr.uky.edu
Lyndon Scott Stephens
Bearings and Seals Laboratory,
University of Kentucky
, 151 RGAN Building, Lexington, Kentucky 40506-0503J. Tribol. Oct 2007, 129(4): 851-859 (9 pages)
Published Online: April 2, 2007
Article history
Received:
March 14, 2006
Revised:
April 2, 2007
Citation
Hadinata, P. C., and Stephens, L. S. (April 2, 2007). "Soft Elastohydrodynamic Analysis of Radial Lip Seals With Deterministic Microasperities on the Shaft." ASME. J. Tribol. October 2007; 129(4): 851–859. https://doi.org/10.1115/1.2768087
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