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RESEARCH PAPERS: Power Transmission and Gearing Papers

Computer-Aided Design of High-Contact-Ratio Gears for Minimum Dynamic Load and Stress

[+] Author and Article Information
Hsiang Hsi Lin, Chinwai Lee

Memphis State University, Memphis, TN 38152

F. B. Oswald, D. P. Townsend

NASA Lewis Research Center, Cleveland, OH 44135

J. Mech. Des 115(1), 171-178 (Mar 01, 1993) (8 pages) doi:10.1115/1.2919315 History: Received July 01, 1991; Online June 02, 2008

Abstract

This paper presents a numerical procedure for minimizing dynamic effects on high-contact-ratio gears by modification of the tooth profile. The paper examines and compares both linear and parabolic tooth profile modifications of high-contact-ratio gears under various loading conditions. The effects of the total amount of modification and the length of the modification zone were systematically studied at various loads and speeds to find the optimum profile design for minimizing the dynamic load and the tooth bending stress. Parabolic profile modification is preferred over linear profile modification for high-contact-ratio gears because of its lower sensitivity to manufacturing errors. For parabolic modification a greater amount of modification at the tooth tip and a longer modification zone are required. Design charts are presented for high-contact-ratio gears with various profile modifications operating under a range of loads. A procedure is illustrated for using the charts to find the optimum profile design.

Copyright © 1993 by The American Society of Mechanical Engineers
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