TY - GEN
T1 - Soft elastohydrodynamic analysis of radial lip seals with deterministic microasperities on the shaft
AU - Hadinata, Philip C.
AU - Stephens, Lyndon Scott
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
KW - Friction
KW - Lip seal
KW - Lubrication
KW - Microasperities
UR - http://www.scopus.com/inward/record.url?scp=33751283387&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33751283387&partnerID=8YFLogxK
U2 - 10.1115/ijtc2006-12120
DO - 10.1115/ijtc2006-12120
M3 - Conference contribution
AN - SCOPUS:33751283387
SN - 0791837890
SN - 9780791837894
T3 - Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006
BT - Proceedings of STLE/ASME International Joint Tribology Conference, IJTC 2006
T2 - STLE/ASME International Joint Tribology Conference, IJTC 2006
Y2 - 23 October 2006 through 25 October 2006
ER -