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Evaluation of a Low-Noise Formate Spiral-Bevel Gear SetStudies to evaluate low-noise Formate spiral-bevel gears were performed. Experimental tests were performed on the OH-58D helicopter main-rotor transmission in the NASA Glenn 500-hp Helicopter Transmission Test Stand. Low-noise Formate spiral-bevel gears were compared to the baseline OH-58D spiral-bevel gear design, a high-strength design, and previously tested low-noise designs (including an original low-noise design and an improved-bearing-contact low-noise design). Noise, vibration, and tooth strain tests were performed. The Formate design showed a decrease in noise and vibration compared to the baseline OH-58D design, and was similar to that of the previously tested improved-bearing contact low-noise design. The pinion tooth stresses for the Formate design significantly decreased in comparison to the baseline OH-58D design. Also similar to that of the improved bearing-contact low-noise design, the maximum stresses of the Formate design shifted toward the heel, compared to the center of the face width for the baseline, high-strength, and previously tested low-noise designs.
Document ID
20080006652
Document Type
Technical Memorandum (TM)
Authors
Lewicki, David g.
(Army Research Lab. Cleveland, OH, United States)
Woods, Ron L.
(Textron Bell Helicopter Fort Worth, TX, United States)
Litvin, Faydor L.
(Illinois Univ. Chicago, IL, United States)
Fuentes, Alfonso
(Universidad Politecnica de Cartagena Cartagena, Spain)
Date Acquired
August 24, 2013
Publication Date
December 1, 2007
Subject Category
Acoustics
Report/Patent Number
E-16204
ARL-TR-4125
NASA/TM-2007-215032
ARL-TR-4135
Funding Number(s)
CONTRACT_GRANT: NCC2-9019
Distribution Limits
Public
Copyright
Public Use Permitted.

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