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Development of the Methodology for 3-D Characterization of Oil Seal Shaft Surfaces
Technical Paper
2002-01-0661
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Shaft surface texture plays a very important role in rotary oil seal system performance. Functionally, the shaft surface has to prevent oil leakage via pumping between the shaft and seal. The shaft surface texture must also provide adequate contact with the seal lip, while maintaining a lubricant film. Furthermore, the initial surface texture of the shaft plays a vital role in the process of oil seal lip break-in. The shaft surface finish specification is typically Ra, 10 to 20 μ″ with a 0° ± 0.05°lead angle.
The paper will describe a new surface measurement method based on interference microscopy, which generates a visual representation of a significant portion of the shaft surface texture to allow direct lead angle detection. Using this new technique, this paper will demonstrate the heredity of lead generation.
The shaft 3D surface texture measurement also provides a measure of the surface volume available for lubricant retention. The surface volume is expressed as the Normalized Oil Volume (NOV) in units of ‘billions of cubic microns per inch squared (BCM)”. Qualitatively, NOV is the amount of volume the surface provides per unit area for lubricant retention. We found that for the seal systems presented here, a NOV of about 0.5 BCM is required for adequate life performance.
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Authors
Citation
Shuster, M., Combs, D., Pillar, J., Burke, D. et al., "Development of the Methodology for 3-D Characterization of Oil Seal Shaft Surfaces," SAE Technical Paper 2002-01-0661, 2002, https://doi.org/10.4271/2002-01-0661.Also In
References
- Shuster M. Seasons R. Burke D. Laboratory Simulation to Select Oil Seal and Surface Treatment Wear 225 1999 954 961
- Peres P. Crankshaft seals and sealing surface wear
- Salant R. Modeling Rotary Lip Seals Wear 207 1997 92 99
- Masuda Y. others A Simulation Test Method for Deterioration of FKM Compounds Engine Crankshaft Oil Seals SAE Paper No. 922373 1992
- Smith S. A quantitative Evaluation of the Effects of Shaft and Hydrodynamic Flutes upon Radial Lip Seal Performance SAE paper No 890995
- Vogt R. Johnston D. The Sealing Performance of Elastomer Rotary Lip Seals on Turned Shafts SAE Paper No 980584
- Bentley. J. Shaft Lead Measurement - a new technique SAE Paper N0 740205
- Rau. N. Seibold M. Evaluation Of The Twist Structure Of Ground Sealing Surfaces Wekstatt und Betried 130 1997 11 Germany
- Dong W.P. Sullivan P.J. Stout K.J. Comprehensive study of parameters for characterizing three-dimensional surface topography. Parameters for characterizing amplitude and some functional properties Wear 178 1994 29 43
- Oil Seal Technical Bulletin 1999 Rubber Manufacturers Association
- Qu Jiajin Non-Ra Roughness Parameters of Shaft Surfaces for Radial Lip Seal Applications !995 Earthmoving Industry Conference Peoria, Illinois 1104 1995
- Shuster M. others Development of the Accelerated Testing Methodology of the off-highway Vehicle Rotary Oil Seal System SAE 2002 2002