Results 121 to 130 of about 8,094 (226)

Fault Diagnosis of Planetary Gearbox Based on Adaptive Order Bispectrum Slice and Fault Characteristics Energy Ratio Analysis. [PDF]

Sensors (Basel), 2020
Shen Z, Shi Z, Zhen D, Zhang H, Gu F.
europepmc   +1 more source

An analytical method for designing low noise helicopter transmissions [PDF]

The development and experimental validation of a method for analytically modeling the noise mechanism in the helicopter geared power transmission systems is described. This method can be used within the design process to predict interior noise levels and
Bossler, R. B., Jr., Bowes, M. A., Royal, A. C.   +2 more
core   +1 more source

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  

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.
core   +1 more source

An investigation into hybrid power trains for vehicles with regenerative braking [PDF]

, 2007
Imperial Users ...
Diego-Ayala, Ulises, Diego-Ayala, Ulises
core  

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.
core   +1 more source

Hybrid geared traction transmissions [PDF]

, 1983
The basic configuration of geared traction drives, geometric and structural factors to be considered in their construction, and current work on hybrid helicopter transmissions rated at 500 and 3000 hp are ...
Nasvytis, A. L., White, G.
core   +1 more source

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
doaj  

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
openaire   +1 more source

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.
core   +1 more source