An analysis was conducted for oil jet lubrication on the disengaging side of a gear mesh. Results of the analysis were computerized and used to determine the oil jet impingement depth for several gear ratios and oil jet to pitch line velocity ratios. An experimental program was conducted on the NASA gear test rig using high-speed photography to experimentally determine the oil jet impingement depth on the disengaging side of mesh. Impingement depth reaches a maximum at gear ratio near 1.5 where chopping by the leading gear tooth limits the impingement depth. The pinion impingement depth is zero above a gear ratio of 1.172 for a jet velocity to pitch time velocity ratio of 1.0 and is similar for other velocity ratios. The impingement depth for gear and pinion are equal and approximately one-half the maximum at a gear ratio of 1.0. Impingement depth on either the gear or pinion may be improved by relocation of the jet from the pitch line or by changing the jet angle. Results of the analysis were verified by experimental results using a high-speed camera and a well lighted oil jet.
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January 1978
This article was originally published in
Journal of Mechanical Design
Article Contents
Research Papers
Study of Lubricant Jet Flow Phenomena in Spur Gears—Out of Mesh Condition
D. P. Townsend
,
D. P. Townsend
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio
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L. S. Akin
L. S. Akin
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio
Search for other works by this author on:
D. P. Townsend
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio
L. S. Akin
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio
J. Mech. Des. Jan 1978, 100(1): 61-68 (8 pages)
Published Online: January 1, 1978
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Received:
June 27, 1977
Online:
October 21, 2010
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Townsend, D. P., and Akin, L. S. (January 1, 1978). "Study of Lubricant Jet Flow Phenomena in Spur Gears—Out of Mesh Condition." ASME. J. Mech. Des. January 1978; 100(1): 61–68. https://doi.org/10.1115/1.3453894
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