The traditional methods for computation of the efficiency of cylindrical gear transmissions are based on the hypotheses of constant friction coefficient and uniform load distribution along the line of contact. However, the changing rigidity of the pair of teeth along the path of contact produces a non–uniform load distribution, which has significant influence on the friction losses, due to the different relative sliding at any point of the line of contact. In previous works, the authors obtained a non-uniform model of load distribution based on the minimum elastic potential criterion. This load distribution was applied to compute the efficiency of spur and helical gears, resulting in slightly greater values of the efficiency than those obtained if the load distribution along the line of contact is assumed to be uniform. In this work, this non-uniform model of load distribution is applied to study the efficiency of involute spur gears with transverse contact ratio between 1 and 2 (i.e., the load is shared among one or two pairs of teeth), assuming the friction coefficient to be constant along the path of contact. Analytical expressions for the power losses due to friction, for the transmitted power and for the efficiency are presented. A study of the influence of some transmission parameters (as gear ratio, pressure angle, etc.) on the efficiency is also presented.
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ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 30–September 2, 2009
San Diego, California, USA
Conference Sponsors:
- Design Engineering Division and Computers in Engineering Division
ISBN:
978-0-7918-4903-3
PROCEEDINGS PAPER
Simplified Calculation Method for the Efficiency of Involute Spur Gears Available to Purchase
Miguel Pleguezuelos,
Miguel Pleguezuelos
UNED, Madrid, Spain
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Marta Mun˜oz
Marta Mun˜oz
UNED, Madrid, Spain
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Jose´ I. Pedrero
UNED, Madrid, Spain
Miguel Pleguezuelos
UNED, Madrid, Spain
Marta Mun˜oz
UNED, Madrid, Spain
Paper No:
DETC2009-87179, pp. 131-138; 8 pages
Published Online:
July 29, 2010
Citation
Pedrero, JI, Pleguezuelos, M, & Mun˜oz, M. "Simplified Calculation Method for the Efficiency of Involute Spur Gears." Proceedings of the ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 6: ASME Power Transmission and Gearing Conference; 3rd International Conference on Micro- and Nanosystems; 11th International Conference on Advanced Vehicle and Tire Technologies. San Diego, California, USA. August 30–September 2, 2009. pp. 131-138. ASME. https://doi.org/10.1115/DETC2009-87179
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