Results 101 to 110 of about 2,255 (235)
Identification and proposed control of helicopter transmission noise at the source [PDF]
Helicopter cabin interiors require noise treatment which is expensive and adds weight. The gears inside the main power transmission are major sources of cabin noise.
Coy, John J. +6 more
core +2 more sources
New generation methods for spur, helical, and spiral-bevel gears [PDF]
New methods for generating spur, helical, and spiral-bevel gears are proposed. These methods provide the gears with conjugate gear tooth surfaces, localized bearing contact, and reduced sensitivity to gear misalignment.
Coy, J. J. +4 more
core +1 more source
Experimental and Analytical Load-Life Relation for AISI 9310 Steel Spur Gears [PDF]
Life tests were conducted at three different loads with three groups of 8.9 cm pitch diameter spur gears made of vacuum arc remelted VAR AISI 9310 steel.
Coy, J. J. +2 more
core +1 more source
An analytical method to predict efficiency of aircraft gearboxes [PDF]
A spur gear efficiency prediction method previously developed by the authors was extended to include power loss of planetary gearsets. A friction coefficient model was developed for MIL-L-7808 oil based on disc machine data. This combined with the recent
Anderson, N. E. +2 more
core +1 more source
Flex-Gears are being developed as an alternative to brushes and slip rings to conduct electricity across a rotating joint. Flex-Gears roll in the annulus of sun and ring gears for electrical contact while maintaining their position by using a novel ...
Peritt, Jonathan, Tsai, Lung-Wen
core +1 more source
Results of NASA/Army transmission research [PDF]
Since 1970 the NASA Lewis Research Center and the U.S. Army Aviation Systems Command have shared an interest in advancing the technology for helicopter propulsion systems. In particular, that portion of the program that applies to the drive train and its
Coe, Harold H. +2 more
core +1 more source
Vibration optimization of spur gear based on GSA-SA algorithm. [PDF]
PLoS One, 2023 Qiu L, Hou X, Gao S, Li Z, Zhu R.
europepmc +1 more source
Profile modification to minimize spur gear dynamic loading [PDF]
An analytical computer simulation program for dynamic modeling of low-contact-ratio spur gear systems is presented. The procedure computes the static transmission error of the gears operating under load and uses a fast Fourier transform to generate the ...
Lin, Hsiang Hsi +2 more
core +1 more source
Influence of linear profile modification and loading conditions on the dynamic tooth load and stress of high contact ratio gears [PDF]
A computer simulation for the dynamic response of high-contact-ratio spur gear transmissions is presented. High contact ratio gears have the potential to produce lower dynamic tooth loads and minimum root stress but they can be sensitive to tooth profile
Lee, Chinwai +3 more
core +1 more source
Computer-Aided-Designing of General Involute Spur Gears
Journal of the Japan Society of Precision Engineering, 1972 Yoshikazu HORIUCHI +3 more
openaire +3 more sources