Results 121 to 130 of about 2,796 (234)
Helicopter transmission testing at NASA Lewis Research Center [PDF]
The helicopter has evolved into a highly valuable air mobile vehicle for both military and civilian needs. The helicopter transmission requires advanced studies to develop a technology base for future rotorcraft advances.
Coy, John J., Lewicki, David G.
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Spiral-bevel geometry and gear train precision [PDF]
, 1983 A new aproach to the solution of determination of surface principal curvatures and directions is proposed. Direct relationships between the principal curvatures and directions of the tool surface and those of the principal curvatures and directions of ...
Coy, J. J., Litvin, F. L.
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A Highly Compact Zip Chain Arm with Origami-Inspired Folding Chain Structures. [PDF]
Biomimetics (Basel), 2023 Kim DK, Jung GP.
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Data Fusion Tool for Spiral Bevel Gear Condition Indicator Data [PDF]
Tests were performed on two spiral bevel gear sets in the NASA Glenn Spiral Bevel Gear Fatigue Test Rig to simulate the fielded failures of spiral bevel gears installed in a helicopter.
Antolick, Lance J. +3 more
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Prediction method for spiral bevel gear tooth surface roughness based on machine learning
Jixie chuandongObjectiveTo address the issues of parameter optimization and prediction accuracy of the surface roughness of spiral bevel gears, and to overcome the limitations of traditional methods in effectively handling complex nonlinear relationships and the ...
LI Jiabin +3 more
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Kinematic precision of gear trains [PDF]
Kinematic precision is affected by errors which are the result of either intentional adjustments or accidental defects in manufacturing and assembly of gear trains. A method for the determination of kinematic precision of gear trains is described.
Coy, J. J. +3 more
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Numerical simulation and process parameter optimization of warm forging for spiral bevel gears
Jixie chuandongObjectiveDue to its numerous advantages, the spiral bevel gear is widely used in the transmission fields of aerospace, automotive, marine, engineering, and port machinery.
WANG Lixiang +3 more
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Generation of spiral bevel gears with conjugate tooth surfaces and tooth contact analysis [PDF]
A new method for generation of spiral bevel gears is proposed. The main features of this method are as follows: (1) the gear tooth surfaces are conjugated and can transform rotation with zero transmission errors; (2) the tooth bearing contact is ...
Lee, Hong-Tao +2 more
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Computer-aided design of bevel gear tooth surfaces [PDF]
This paper presents a computer-aided design procedure for generating bevel gears. The development is based on examining a perfectly plastic, cone-shaped gear blank rolling over a cutting tooth on a plane crown rack.
Coy, John J. +2 more
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Jixie chuandong, 2012 The high power density is always one of important goals of the gear box.The invented planetary transmission mechanism of spiral bevel gears has the advantages of the spiral bevel gears transmission and the planetary gear transmission,compact structure ...
常巧红 +4 more
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