A parametric study of oil-jet lubrication in gear wheels
, 2018 A parametric study of oil-jet lubrication in gear wheels is conducted using Computational Fluid Dynamics (CFD) to study the effect of the different design parameters on the cooling performance in a gearbox. Flow in oil jet lubrication is found to be complex with the formation of oil ligaments and droplets.
openaire +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
Rolling-element bearings: A review of the state of the art [PDF]
Some of the research conducted which has brought rolling-element technology to its present state is discussed. Areas touched upon are material effects, processing variables, operating variables, design optimization, lubricant effects and lubrication ...
Anderson, W. J., Zaretsky, E. V.
core +1 more source
NASA transmission research and its probable effects on helicopter transmission design [PDF]
Transmissions studied for application to helicopters in addition to the more conventional geared transmissions include hybrid (traction/gear), bearingless planetary, and split torque transmissions. Research is being performed to establish the validity of
Coy, J. J. +2 more
core +1 more source
Predicted and experimental performance of jet-lubricated 120-millimeter-bore ball bearings operating to 2.5 million DN [PDF]
Bearing inner- and outer-race temperatures and friction power losses were calculated using two computer programs. The values obtained were compared with previously reported experimental data for 120 mm bore bearings which operated at thrust loads to 22 ...
Coe, H. H., Zaretsky, E. V.
core +1 more source
Investigations on Spin Power Losses Generated in a Planetary Gear Set Using Thermal Network Method
LubricantsThis paper introduces an experimental approach to study the distribution of power losses in an oil jet-lubricated planetary gear set, with the aim of increasing the efficiency of these gearboxes.
Marie Winger +5 more
doaj +1 more source
Spur-Gear-System Efficiency at Part and Full Load [PDF]
A simple method for predicting the part- and full-load power loss of a steel spur gearset of arbitrary geometry supported by ball bearings is described. The analysis algebraically accounts for losses due to gear sliding, rolling traction, and windage in ...
Anderson, N. E., Loewenthal, S. H.
core +1 more source
Study on the Wear-resisting Performance of Automobile Engine Timing Sleeve Chain
Jixie chuandong, 2017 The wear test of 05 CT automobile engine timing chain of slit sleeve and seamless sleeve is carried out,the results show that,under the same experimental conditions,the pin and sleeves of two different forms all have cyclic softening phenomenon more or ...
Xu Xiuqin, Zhao Jianxiang, Meng Fanzhong
doaj
Experimental characterization of friction coefficients at the tool-chip-workpiece interface in cutting: Evaluation of lubrication efficiency of mineral oil [PDF]
, 2010 Collaboration avec le LTDS/ENISEThe characterization of friction coefficients at the tool-chip-workpiece interface remains an issue. This paper presents a new experimental set-up able to simulate similar tribological phenomena as the ones occurring at ...
CLAUDIN, Christophe +4 more
core +2 more sources
Advances in high-speed rolling-element bearings [PDF]
Aircraft engine and transmission rolling-element bearing state-of-the-art is ...
Zaretsky, E. V.
core +1 more source