Results 101 to 110 of about 14,675 (206)

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., Townsend, D. P., Zaretsky, E. V.   +2 more
core   +1 more source

Investigations on Spin Power Losses Generated in a Planetary Gear Set Using Thermal Network Method

Lubricants
This 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, Yann Marchesse, Thomas Touret, Christophe Changenet, Fabrice Ville, Patrice Gédin   +5 more
doaj   +1 more source

Endurance and failure characteristics of main-shaft jet engine bearings at 3x10 to the 6th power DN [PDF]

Groups of thirty 120-mm bore angular contact ball bearings were endurance tested at a speed of 12,000 and 25,000 rpm and a thrust load of 66 721 N. The bearings were manufactured from a single heat of VIM-VAR AISI M-50 steel.
Bamberger, E. N., Signer, H., Zaretsky, E. V.   +2 more
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  

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

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

Hybrid ML-Based Cutting Temperature Prediction in Hard Milling Under Sustainable Lubrication

Lubricants
The field of hard milling has recently witnessed growing interest in environmentally sustainable machining practices. Among these, Minimum Quantity Lubrication (MQL) has emerged as an effective strategy, offering not only reduced environmental impact but
Balasuadhakar Arumugam, Thirumalai Kumaran Sundaresan, Saood Ali   +2 more
doaj   +1 more source

Three dimensional flow structures in journal bearings [PDF]

, 2009
This paper was presented at the 2nd Micro and Nano Flows Conference (MNF2009), which was held at Brunel University, West London, UK. The conference was organised by Brunel University and supported by the Institution of Mechanical Engineers, IPEM, the ...
2nd Micro and Nano Flows Conference (MNF2009), Nobis, M, Schmidt, M, Stucke, P   +3 more
core  

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

Supersonic transport lubrication system investigation, phase 2 Periodical report [PDF]

Evaluation tests of ball bearings, face seals, and lubricants for use on Mach 3 aircraft gas turbine engine ...
Rhoads, W. L.
core   +1 more source