NDLI: Face-gear drives: design, analysis, and testing for helicopter transmission applications

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Face-gear drives: design, analysis, and testing for helicopter transmission applications

Content Provider	NASA Technical Reports Server (NTRS)
Author	Heath, G. Bossler Jr., R. B. Chen, Y.-J. D. Lewicki, D. G. Wang, J.-C. Litvin, F. L.
Copyright Year	1992
Description	The use of face-gears in helicopter transmissions was explored. A light-weight, split-torque transmission design utilizing face-gears is described. Face-gear design and geometry were investigated. Topics included tooth generation, limiting inner and outer radii, tooth contact analysis, contact ratio, gear eccentricity, grinding, and structural stiffness. Design charts were developed to determine minimum and maximum face-gear inner and outer radii. An analytical study showed that the face-gear drive is relatively insensitive to gear misalignment with respect to transmission errors, but the tooth contact is affected by misalignment. A method of localizing the bearing contact to permit operation with misalignment was explored. Two new methods for grinding of the face-gear tooth surfaces were also investigated. The proper choice of shaft stiffness enabled good load sharing in the split-torque transmission design. Face-gear experimental studies were also conducted. These tests demonstrated the feasibility of face-gears in high-speed, high-load applications such as helicopter transmissions.
File Size	1249358
Page Count	18
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930017944
Archival Resource Key	ark:/13960/t02z64w8h
Language	English
Publisher Date	1992-10-01
Access Restriction	Open
Subject Keyword	Mechanical Engineering Gears Gear Teeth Misalignment Helicopter Propeller Drive Stiffness Helicopter Design Contact Loads Transmissions Machine Elements Shafts Machine Elements Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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