Computer-Aided Design for High-Contact-Ratio Gears for Minimum Dynamic Load and Stress
Abstract
This paper presents a computer-aided design procedure for minimizing dynamic effects on high-contact-ration 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 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1990
- Accession Number
- ADA227149
Entities
People
- Chinwai Lee
- Dennis P. Townsend
- Fred B. Oswald
- Hsiang H. Lin
Organizations
- National Aeronautics and Space Administration