Hydrodynamic Analysis of the Flow in a Rotary Lip Seal Using Flow Factors

The flow field in the lubricating film of a rotary lip seal is analyzed numerically by solving the Reynolds equation with flow factors. The behavior of such a flow field is dominated by the asperities on the lip surface. Since previous analyses treated those asperities deterministically, they required very large computation times. The present approach is much less computationally intensive because the asperities are treated statistically. Since cavitation and asperity orientation play important roles, these are taken into account in the computation of the flow factors. Results of the analysis show how the operating parameters of the seal and the characteristics of the asperities affect such seal characteristics as the pressure distribution in the film, the pumping rate and the load support.

[1]  R. F. Salant,et al.  Numerical Study of a Rotary Lip Seal With a Quasi-Random Sealing Surface , 2001 .

[2]  Richard F. Salant,et al.  A mixed soft elastohydrodynamic lubrication model with interasperity cavitation and surface shear deformation , 2000 .

[3]  Sy-Wei Lo,et al.  On the Effects of Roughness Orientation—A Mapping and Double Scale Analysis of Flow Factors , 1992 .

[4]  Harry van Leeuwen,et al.  The sealing and lubrication principles of plain radial lip seals: an experimental study of local tangential deformations and film thickness , 1997 .

[5]  H. K. Muller,et al.  Concepts of Sealing Mechanism of Rubber Lip Type Rotary Shaft Seals , 1987 .

[6]  Richard F. Salant,et al.  Elastohydrodynamic Analysis of Reverse Pumping in Rotary Lip Seals With Microundulations , 1994 .

[7]  H. Cheng,et al.  Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces , 1979 .

[8]  Richard F. Salant.  Theory of lubrication of elastomeric rotary shaft seals , 1999 .

[9]  M.J.L. Stakenborg,et al.  On the sealing mechanism of radial lip seals , 1988 .

[10]  Leslie A. Horve,et al.  Understanding The Sealing Mechanism Of The Radial Lip Seal For Rotating Shafts , 1992 .

[11]  E. T. Jagger.  Rotary Shaft Seals: The Sealing Mechanism of Synthetic Rubber Seals Running at Atmospheric Pressure , 1957 .

[12]  H. Cheng,et al.  An Average Flow Model for Determining Effects of Three-Dimensional Roughness on Partial Hydrodynamic Lubrication , 1978 .

[13]  Richard F. Salant,et al.  An Average Flow Model of Rough Surface Lubrication With Inter-Asperity Cavitation , 2001 .

[14]  Richard F. Salant,et al.  Elastohydrodynamic Model of the Rotary Lip Seal , 1996 .