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An Evaluation of Friction Effects on Hypoid Gear Life and Bearing Load
Technical Paper
2000-01-2626
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Premature parts breakdown in the final drive of heavy vehicle powertrains in vehicles equipped with high power retarders leads one to believe that the coasting mode gear forces may be higher than anticipated. There is limited experimental data that supports this hypothesis in the observation of high bearing load and gear bending stress in coast mode. However, without an in-depth analysis, it is unclear exactly how the high load is generated. There are several suggested causes: friction, gear geometry, and system compliance. The present study focuses on the effects of hypoid gear friction on the powertrain. Analytical expressions of the gear friction vector as a function of gear pressure, pitch and spiral angles, spiral hand and directions of rotation and applied torque were derived and examined. Attempts were made to correlate test-measured quantities and results from analytical models with and without the consideration of gear friction. Although the investigation is not entirely complete, preliminary evidence suggests that friction is not a dominant factor. Some recommendations are given on the axle design for performance enhancement.
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Citation
Shih, S., Kuan, S., Keeney, C., and Yamada, S., "An Evaluation of Friction Effects on Hypoid Gear Life and Bearing Load," SAE Technical Paper 2000-01-2626, 2000, https://doi.org/10.4271/2000-01-2626.Also In
References
- The Timken Company Bearing Selection Manual
- Lechner G. Naunheimer H. “Automotive Transmissions - Fundamentals, Selection, Design and Application Springer 1999
- Coleman W. “Design and Manufacture of Spiral Bevel and Hypoid Gears for Heavy-Duty Drive Axles” 1962
- Basas J. Bawle V. Liu Y. Bienick R. D'souza V. Shih S. Chu H, “Optimizing Pinion Bearing System Performance in Heavy Duty Truck Axles” Rockwell/Meritor Annual Quality Symposium Proceedings 1988
- Shih S. Wang Y. Cadaret P. “Contact Durability Analysis Methodology and Applications in Vehicle Powertrain Components Design” SAE paper 1999-01-2813
- Vijayakar S. “User's Manual for the Contact Analysis Program Package (CAPP) V.1.23” 1994 Advanced Numerical Solutions Columbus, Ohio
- Shih S. Kuan S. Keeney C. Ledesma R, “Heavy and Medium Duty Vehicle Powertrain Virtual Prototyping” SAE Paper 982824 International Truck & Bus Meeting & Exposition November 1998