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Static Load Sharing Characteristics of Transmission Planetary Gear Sets: Model and Experiment
Technical Paper
1999-01-1050
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
One of the most common applications of planetary (epi-cyclic) gear sets is found in automotive transmissions. A planetary gear set typically total torque applied to be shared by multiple planets making a higher power density possible. This advantage of the planetary gear sets relies heavily on the assumption that each pinion carries an equal share of the total torque applied. However, in production, gear manufacturing and assembly variations along with certain design parameters may prevent equal load sharing among the planets. Here, a generalized mathematical model of a single-stage planetary gear set having n planets is developed to predict load shared by each planet under quasi-static conditions. The model takes into account effects of two most common errors including pinion carrier errors and gear run-out errors. Results of an experimental test program are used to validate the predictions of the model. Generalized guidelines for equal load sharing are also presented.
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Citation
Kahraman, A., "Static Load Sharing Characteristics of Transmission Planetary Gear Sets: Model and Experiment," SAE Technical Paper 1999-01-1050, 1999, https://doi.org/10.4271/1999-01-1050.Also In
References
- Muller, H. W. 1982 Epicyclic Drive Trains Detroit Wayne State University Press
- Seager 1970 “Load Sharing Among Planet Gears,” SAE Paper 700178
- Kahraman, A. 1994 “Load Sharing Characteristics of Planetary Transmissions,” Mech. Mach. Theory 29 1151 1165
- Balasubramanian, B. 1983 Dynamische Lastverteilung in Planetensatzen Universitat Karlsruhe Germany
- Singh, A. Houser, D. R. 1994 “Analysis of Off-line of Action Contact at the Tips of Gear Teeth,” SAE Paper 941761