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 100-by-100-μm unit cell and are investigated using Reynold’s 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 0.3 and 5 micron. The calculation for load capacity and friction coefficient indicates that there are values for asperity height where load capacity and friction coefficient are optimized. These optimum heights were reached at 1–3 μm. 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 presence of all designs in the lip seal shows significant improvement on lubrication characteristics, i.e. increasing load support and reducing friction coefficient.
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STLE/ASME 2006 International Joint Tribology Conference
October 23–25, 2006
San Antonio, Texas, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4259-2
PROCEEDINGS PAPER
Soft Elastohydrodynamic Analysis of Radial Lip Seals With Deterministic Microasperities on the Shaft
Philip C. Hadinata,
Philip C. Hadinata
University of Kentucky, Lexington, KY
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Lyndon Scott Stephens
Lyndon Scott Stephens
University of Kentucky, Lexington, KY
Search for other works by this author on:
Philip C. Hadinata
University of Kentucky, Lexington, KY
Lyndon Scott Stephens
University of Kentucky, Lexington, KY
Paper No:
IJTC2006-12120, pp. 197-205; 9 pages
Published Online:
October 2, 2008
Citation
Hadinata, PC, & Stephens, LS. "Soft Elastohydrodynamic Analysis of Radial Lip Seals With Deterministic Microasperities on the Shaft." Proceedings of the STLE/ASME 2006 International Joint Tribology Conference. Part A: Tribomaterials; Lubricants and Additives; Elastohydrodynamic Lubrication; Hydrodynamic Lubrication and Fluid Film Bearings; Rolling Element Bearings; Engine Tribology; Machine Components Tribology; Contact Mechanics. San Antonio, Texas, USA. October 23–25, 2006. pp. 197-205. ASME. https://doi.org/10.1115/IJTC2006-12120
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