Fluid reaction surfaces (i.e. – impellers) – With means positioning fluid current driven impeller...
Patent
1993-08-30
1994-10-11
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
With means positioning fluid current driven impeller...
416 44, 416 47, 416140, 416134R, F03D 106
Patent
active
053541758
ABSTRACT:
A rotor hub is provided for coupling a wind turbine rotor blade and a shaft. The hub has a yoke with a body which is connected to the shaft, and extension portions which are connected to teeter bearing blocks, each of which has an aperture. The blocks are connected to a saddle which envelops the rotor blade by one or two shafts which pass through the apertures in the bearing blocks. The saddle and blade are separated by a rubber interface which provides for distribution of stress over a larger portion of the blade. Two teeter control mechanisms, which may include hydraulic pistons and springs, are connected to the rotor blade and to the yoke at extension portions. These control mechanisms provide end-of-stroke damping, braking, and stiffness based on the teeter angle and speed of the blade.
REFERENCES:
patent: 1539273 (1925-05-01), Reed
patent: 2454058 (1948-11-01), Hays
patent: 3495965 (1970-02-01), Kurtz et al.
patent: 4352634 (1982-10-01), Andrews
patent: 4415813 (1983-11-01), Carme
patent: 4515525 (1985-05-01), Doman
patent: 4557666 (1985-12-01), Baskin et al.
patent: 4838761 (1989-06-01), Sheppard
patent: 4913411 (1990-04-01), Collins et al.
Coleman Clint
Jankowski Joseph
Kurth William T.
Larson James A.
Look Edward K.
Northern Power Systems Inc.
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