Results 121 to 130 of about 8,052 (227)

Modern methods of synthesis of automatic planetary gearboxes

Izvestiya MGTU MAMI, 2017
An increase in the number of gears in automotive transmissions is the most efficient way to reduce fuel consumption and improve the efficiency of automotive vehicles equipped with internal combustion engines. The more gears in the gearbox, the more complicated become the used mechanisms and their number increases as well.
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Design and evaluation of fluidized bed heat recovery for diesel engine systems [PDF]

The potential of utilizing fluidized bed heat exchangers in place of conventional counter-flow heat exchangers for heat recovery from adiabatic diesel engine exhaust gas streams was studied.
Hamm, J. R., Lippert, T. E., Newby, R. A., Vidt, E. J.   +3 more
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Efficiency testing of a helicopter transmission planetary reduction stage [PDF]

A parametric study of the efficiency of a 310-kW (420-hp) helicopter transmission planetary test section (four planets) was performed. The purpose was to determine the planetary contribution to the overall transmission power loss.
Handschuh, Robert F., Rohn, Douglas A.
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Study of vibration signal modulation characteristics of the planetary gearbox with the sun gear crack fault

Jixie chuandong
ObjectiveIn planetary gearboxes, the vibration signals of various gear pairs are superimposed and influenced by transmission path effects, resulting in complex spectral components and increasing the difficulty of fault diagnosis.
JING Hongxiang, ZHEN Dong, FENG Guojin, CUI Zhanbo, LIANG Xiaoxia, ZHANG Hao   +5 more
doaj  

Gear tooth stress measurements of two helicopter planetary stages [PDF]

Two versions of the planetary reduction stages from U.S. Army OH-58 helicopter main rotor transmissions were tested at NASA Lewis. One sequential and one nonsequential planetary were tested.
Krantz, Timothy L.
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An overview of advancements in helicopter transmission design [PDF]

, 1983
Development of a high temperature operating helicopter gearbox is ...
Mancini, J. H.
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Experimental and analytical evaluation of efficiency of helicopter planetary stage [PDF]

The efficiency of a helicopter transmission planetary stage was studied both experimentally and analytically. Experiments were done by using a back-to-back, test-and-slave arrangement.
Krantz, Timothy L.
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Modal analysis of multistage gear systems coupled with gearbox vibrations [PDF]

An analytical procedure to simulate vibrations in gear transmission systems is presented. This procedure couples the dynamics of the rotor-bearing gear system with the vibration in the gear box structure. The model synthesis method is used in solving the
Choy, F. K., Ruan, Y. F., Townsend, D. P., Tu, Y. K., Zakrajsek, J. J.   +4 more
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Analysis of the Cause of Clearance Deviation of Planetary Gear Pair in Wind Turbine Gearbox

Jixie chuandong, 2019
As wind power transmission gear key parts， because of irregular under strong wind and Martin shock loads， so that its work reliability decides the reliability of the wind turbine gearbox.
Yutian Zeng, Junwei Zou, Jinku Li, Jingyuan Xiao, Meiling Zhu   +4 more
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DETERMINATION OF OPTIMAL BACKLASH IN PLANETARY GEARBOXES

Mühendislik Bilimleri ve Tasarım Dergisi
Planetary gear reducers are widely used in sectors due to their high efficiency. In this study, the design, analysis, and experimental validation of a planetary gear system with a module of 4 and a gear ratio of 3.56 consisting of a central sun gear, three planetary gears, and an internally toothed ring gear have been carried out. The sun and planetary
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