Pitch actuator for wind turbine generator, and wind turbine...

Details Pitch actuator for wind turbine generator, and wind turbine... Pitch actuator for wind turbine generator, and wind turbine...

2011-03-15

2011-03-15

Kershteyn, Igor (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Motor bodily rotatable with impeller hub or shaft

C416S156000, C416S15700A, C416S15700A, C415S004200, C415S004400

Reexamination Certificate

active

07905707

ABSTRACT:
Provided are a pitch actuator for a wind turbine generator and a wind turbine generator that can be prevented from losing their reliability. Provided are a cylinder (12) and a rod (13) that rotate a wind turbine rotor blade about an axis thereof relative to a rotor head to change a pitch angle; a cylinder bearing (14, 15) supporting the cylinder (12) so as to be rotatable relative to the rotor head about a first rotation axis (L1) extending substantially parallel to the axis of the wind turbine rotor blade and about a second rotation axis (L2) extending in a direction crossing both the first rotation axis (L1) and the axis of the cylinder (12) and the rod (13); and a rod bearing (16) rotatably supporting an end of the rod (13) on an end surface of the wind turbine rotor blade.

REFERENCES:
patent: 4201514 (1980-05-01), Huetter
patent: 4431375 (1984-02-01), Carter et al.
patent: 4534705 (1985-08-01), Selestam et al.
patent: 5584655 (1996-12-01), Deering
patent: 6465901 (2002-10-01), Croes
patent: 2851720 (1980-06-01), None
patent: 05149237 (1993-06-01), None
patent: 2002276535 (2002-09-01), None
International Search Report from International Application No. PCT/JP2008/057911, filed Apr. 24, 2008 (WO 2008/146557).

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