Fluid reaction surfaces (i.e. – impellers) – Working member foldable – pivotable or collapsible to non-use...
Patent
1991-09-13
1993-10-12
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Working member foldable, pivotable or collapsible to non-use...
416132B, 416227A, 416DIG6, 416Dig8, F03D 300, F03D 1100
Patent
active
052520293
ABSTRACT:
A Darrieus-type vertical axis wind turbine is disclosed which includes a vertically extending hollow rotor shaft mounted on a support structure with two, three, or four rotor blades of troposkein configuration on the rotor shaft for rotating the shaft in response to wind energy and thereby drive a generator to produce electrical power. The turbine includes an erection hinge and gin pole which permits the turbine to be cable hoisted using a simple winch mounted at or near ground level. The erection hinge and pole also permits the turbine to be completely assembled near ground level. The turbine includes two sets of guy cables. The upper set holds the upper bearing assembly and the upper rotor shaft portion in a fixed vertical position. The lower cable set holds the lower rotor shaft portion and the support structure also in a fixed vertical position. A flexible coupling is used to connect the low speed shaft of the generator speed reducer to the rotor shaft. This flexible low speed coupling greatly reduces wind induced torque ripple and related vibration and resonance problems. A guy cable tension adjustment and vibration damping apparatus is also disclosed.
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Thomas G. Carne All 26 pages 1980 "Guy-Cable Design and Damping for Vertical Turbine".
B. F. Blackwell All 8 pages 1974 (Apr.) "The Vertical-Axis Wind Turbine (How It Works)".
Dudd, Ashwill, Berg, All 19 pages 1989 (Sep.) "Test Results and Status of the Doe/Sandia 34-M VAWT".
Robert C. Reuter, Mark Worstell 31 Page all 1878 "Torque Ripple in a Vertical Axis Wind Turbine".
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Larson James A.
Look Edward K.
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