Results 91 to 100 of about 14,758 (224)
NASA helicopter transmission system technology program [PDF]
, 1983 The purpose of the NASA Helicopter Transmission System Technology Program is to improve specific mechanical components and the technology for combining these into advanced drive systems to make helicopters more viable and cost competitive for commerical ...
Zaretsky, E. V.
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Supersonic transport lubrication system investigation Third semiannual report, 1 Nov. 1965 - 1 May 1966 [PDF]
Ball bearing and bellows face seals for supersonic aircraft gas turbine engine mainshafts tested with selected lubricants using oil-mist and jet lubrication ...
Rhoads, W. L., Sibley, L. B.
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Rolling-contact bearing reference summary [PDF]
Design and performance of rolling contact ...
Cox, D. B. +3 more
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Gear Lubrication and Cooling Experiment and Analysis [PDF]
A gear tooth temperature analysis was performed using a finite element method combined with a calculated heat input, a calculated oil jet impingement depth, and estimated heat transfer coefficients for the different parts of the gear tooth that are oil ...
Akin, L. S., Townsend, D. P.
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Numerical Modeling of Oil-Jet Lubrication for Spur Gears using Smoothed Particle Hydrodynamics
, 2016 Understanding and optimizing the lubrication and cooling in aero engine gearbox applications is crucial for a reliable and efficient sub-system design of future aircraft engines. Due to the complex design of gearboxes with its various rotating parts, space and access for experimental investigations are severely limited. Thus, suitable numerical methods
Keller, Marc C. +7 more
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Development of a full-scale transmission testing procedure to evaluate advanced lubricants [PDF]
Experimental tests were performed on the OH-58A helicopter main rotor transmission in the NASA Lewis 500-hp Helicopter Transmission Test Stand. The testing was part of a joint Navy/NASA/Army lubrication program.
Decker, Harry J. +2 more
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Jixie chuandong, 2014 With respect to the oil flux demand among gear mesh points and bearings within gear transmission system,simulation and analysis among several lubrication systems for the specific aircraft engine gearbox are conducted by using network modeling method.Oil ...
郭霞
doaj
Gearing technology in its modern form has a history of only 100 years. However, the earliest form of gearing can probably be traced back to fourth century B.C. Greece. Current gear practice and recent advances in the technology are drawn together.
Coy, J. J. +2 more
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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.
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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
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