Overview

The history of gears with asymmetric teeth is not sufficiently recorded in modern gear literature, with some gear researchers concluding that asymmetric tooth gears were discovered just several decades ago. This book sheds light upon the origins and state of asymmetric gearing, referencing technical articles from the 19th, 20th, and 21st centuries. As a practicing gear engineer with over 40 years’ experience, author Alexander L. Kapelevich has successfully implemented asymmetric gears in a variety of custom gear transmissions. This book addresses all aspects of asymmetric gear development, including theoretical fundamentals; tooth geometry optimization; stress analysis and rating; design and production specifics; analytical and experimental comparison to the best symmetric gears; and application examples. Readers are encouraged to look beyond the status quo established by traditional gear design, and to apply principles of asymmetric gearing to actual gear design. Optimal solutions are presented for gear drives that will maximize technical performance and marketability. Features Presents a state-of the-art, comprehensive historical overview of asymmetric gearing Explains the Direct Gear Design® approach to asymmetric gear design Describes asymmetric tooth gear geometry optimization, areas of existence, and parameter selection limits Considers practical aspects of asymmetric gear fabrication and measurement Presents analytical and experimental comparison of asymmetric gears to advanced symmetric gears, showing the advantages of asymmetric designs Provides numerous real-world examples of asymmetric gear application

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9781138554443

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Reviews

This book covers the development stages of asymmetric gear trains, progressing from theory through analysis, manufacturing, and final applications. The author shows the benefits of the asymmetric mesh, and includes practical recommendations for gear fabrication. This material can be useful for new gearbox designs as well as for applications where higher gearbox torque capabilities are required within limited existing envelopes. Overall, this new work will offer helpful information for multiple generations of engineers. -Yuriy Gmirya, Sikorsky Aircraft Corporation, a Lockheed Martin Company

Author Information

"Dr. Alexander L. Kapelevich is a gear design consultant at AKGears, LLC. He holds a Master’s Degree in Mechanical Engineering at Moscow Aviation Institute and a Ph.D. Degree in Mechanical Engineering at Moscow State Technical University. Dr. Kapelevich has over 40 years of gear transmission research and design experience. He began his career working in the Russian Aviation Industry, where he was involved in R&D, software development, testing, and failure investigation for aerospace gear transmissions. Living in the USA since 1994, he developed the Direct Gear Design methodology for custom gear transmissions which have been implemented in various fields such as aerospace, automotive, agriculture, defense, robotics, racing, and many others. His specialty is the gear drive architecture, planetary systems, gear tooth geometry optimization, gears with asymmetric teeth, and gear transmission performance maximization. Dr. Kapelevich is the author of the book titled ""Direct Gear Design"" and many technical articles. He is a member of the American Gear Manufacturers Association."

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