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Development of an Accelerated Testing Methodology of Rotary Oil Seals for Off-Highway Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
Annotation ability available
This paper will describe the development of an accelerated testing methodology for an off-highway vehicle rotary oil seal system. There are two typical field failure mechanisms associated with off-highway input pinion shaft oil seals: 1) excessive abrasive wear of soft seal lip and hard shaft surface due to abrasive environment; 2) excessive heat and degradation of the seal lip due to lack of lubricity and wear of the shaft surface run against this seal. The accelerated testing of the rotary oil seal consisted of a combination of the following factors; shaft run-out, eccentricity, testing temperature, rotation and reciprocal motion of the seal lip relative to the shaft surface. The combination of these factors especially reciprocal motion reproduces the same failure mechanism, i.e. shaft wear grooves and oil seal lip wear observed on the field usage samples with 6,300 hours service in only 350 hours of accelerated testing.
The methodology consists of evaluating the following parameters; the number of test cycles before a leak occurs, oil seal lip wear and depth of the wear groove on the shaft surface in contact with the seal oil lip. An important part of this methodology is a detailed metallurgical and metrological examination/comparison of the field and lab tested samples. This examination includes Scanning Electron Microscope (SEM) and Energy Dispersive Spectrometer (EDS) analysis of the oil seal lips and 2D and 3D analysis of the shaft surface. The test matrix consisted of two seal materials and three different seal designs (double, triple and quad lips) tested in conjunction with two different shaft surface machining techniques (grinding and burnishing) and associated surface roughness characteristics, and their influence on seal lip wear will be presented.
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CitationShuster, M., Fishburn, B., Bowser, M., Deis, M. et al., "Development of an Accelerated Testing Methodology of Rotary Oil Seals for Off-Highway Vehicles," SAE Technical Paper 2002-01-1172, 2002, https://doi.org/10.4271/2002-01-1172.
- Shuster M. and others. Accelerated Tribological Testing of Automotive Components. 98NM033, 31 ISATA Congress, June 2-5, Dusseldorf, 1998.
- Masuda Y., and others. A Simulation Test Method for Deterioration of FKM Compounds Engine Crankshaft Oil Seals, SAE Paper No. 922373, 1992.
- Shuster M., Seasons R., Burke D. Laboratory Simulation To Select Oil Seal And Surface Treatment. Wear 225 (1999) P. 954-961.
- Jonston D. Rotary Shaft Seal Friction. The influence of Design, Material, Oil and Shaft Surface. SAE Paper No 950764.
- Nagasawa S. and others. Simulation Test Method for Deterioration of Engine Crankshaft Oil Seals. SAE Paper # 902123.
- Hirabayashi H. and others. An influence of Reciprocating Motion of Rotary Shaft on Sealing Characteristics of Oil Seals for Automotive Transmission, SAE Paper No. 820144, 1982.
- Dinzburg B. Rubber Elasticity - The Main Characteristic for Dynamic Shaft Seals. Presentation at 148th meeting of the Rubber Division, American Chemical Society. Cleveland, OH. October 17-20, 1995.
- Jiajin Qu. Non-Ra Roughness Parameters of Shaft Surfaces for Radial Lip Seal Applications. 1995 Earthmoving Industry Conference. Peoria, Illinois, Vol. 1104 (1995).
- Antonini J., Shuster M., Sverdlik D. Oil Seal Tester, Patent No 5,814,717 From 9/28/98.