Hybrid Gear Preliminary Results Application Of Composites To Dynamic Mechanical Components
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Hybrid Gear Preliminary Results-Application of Composites to Dynamic Mechanical Components
Author: National Aeronautics and Space Adm Nasa
language: en
Publisher: Independently Published
Release Date: 2019-01-18
Composite spur gears were fabricated and then tested at NASA Glenn Research Center. The composite material served as the web of the gear between the gear teeth and a metallic hub for mounting to the torque-applying shaft. The composite web was bonded only to the inner and outer hexagonal features that were machined from an initially all-metallic aerospace quality spur gear. The Hybrid Gear was tested against an all-steel gear and against a mating Hybrid Gear. As a result of the composite to metal fabrication process used, the concentricity of the gears were reduced from their initial high-precision value. Regardless of the concentricity error, the hybrid gears operated successfully for over 300 million cycles at 10000 rpm and 490 in.*lbs torque. Although the design was not optimized for weight, the composite gears were found to be 20% lighter than the all-steel gears. Free vibration modes and vibration/noise tests were also conduct to compare the vibration and damping characteristic of the Hybrid Gear to all-steel gears. The initial results indicate that this type of hybrid design may have a dramatic effect on drive system weight without sacrificing strength. Handschuh, Robert F. and Roberts Gary D. and Sinnamon, R. and Stringer, David B. and Dykas, Brian D. and Kohlman, Lee W. Glenn Research Center E-18121, E-18121-1
Hybrid Gear Preliminary Results-Application of Composites to Dynamic Mechanical Components
Author: Nasa Technical Reports Server (Ntrs)
language: en
Publisher: BiblioGov
Release Date: 2013-07
The NASA Technical Reports Servcr (NTRS) houses half a million publications that are a valuable means of information to researchers, teachers, students, and the general public. These documents are all aerospace related with much scientific and technical information created or funded by NASA. Some types of documents include conference papers, research reports, meeting papers, journal articles and more. This is one of those documents.
Polymer Gears
Polymer Gears discusses polymer gear design and their efficient mechanical properties, light weight, and low noise during operation. As plastic gears are replacing metallic gears in traditional and new applications, there is still lack of material characterization and complex relations between different geometric and operating parameters. Thus, polymer gear design remains an open challenge. This book serves as a comprehensive and professional guide on the topic, providing readers with current developments carried out in the field of plastic gears production, characterization, and applications.This will include material development, tribological properties, simulations, and processing methods. - Current developments carried out in the field of plastic gear production - Presents the characterization of plastic gear production - Includes applications of plastic gear production and development - Provides updates on tribological properties, simulations, and processing methods