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"Bearingless" Bull GearConcept for mounting bull gear eliminates need for heavy bull-gear shaft and its supporting bearings otherwise required to react large loads. Three pairs of pinion gears supply torque to bull gear. Provides lateral support, eliminating need for bull-gear shaft and its bearing. Supporting rings with outer surfaces meeting at pitch circles react lateral loads. Intended primarily for application in helicopter in which bull gear on shaft turning rotor combines driving torques from three or more engines.
Document ID
19910000178
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Kish, J.
(United Technologies Corp.)
Webb, G.
(United Technologies Corp.)
Date Acquired
August 14, 2013
Publication Date
April 1, 1991
Publication Information
Publication: NASA Tech Briefs
Volume: 15
Issue: 4
ISSN: 0145-319X
Subject Category
Machinery
Report/Patent Number
LEW-14911
Accession Number
91B10178
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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