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Analytical Model of the Efficiency of Spur Gears: Study of the Influence of the Design Parameters

[+] Author Affiliations
Miguel Pleguezuelos, José I. Pedrero, Miryam B. Sánchez

UNED, ETS Ingenieros Industriales, Madrid, Spain

Paper No. DETC2011-47662, pp. 557-565; 9 pages
  • ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 11th International Power Transmission and Gearing Conference; 13th International Conference on Advanced Vehicle and Tire Technologies
  • Washington, DC, USA, August 28–31, 2011
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5485-3
  • Copyright © 2011 by ASME


An analytic model to compute the efficiency of spur gears has been developed. It is based on the application of a non-uniform model of load distribution obtained from the minimum elastic potential criterion and a simplified non-uniform model of the friction coefficient along the path of contact. Both conventional and high transverse contact ratio spur gears have been considered. Analytical expressions for the power losses due to friction, for the transmitted power and for the efficiency are presented. From this model, a complete study of the influence of some design parameters (as the number of teeth, the gear ratio, the pressure angle, the addendum modification coefficient, etc.) on the efficiency is presented.

Copyright © 2011 by ASME
Topics: Design , Gears , Spur gears



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