| 摘要 |
{Abstract} A pitch-control system 15 according to the present invention, which should be capable of changing the pitch angle of a wind turbine blade with a simple, lightweight, low-cost, and highly durable structure without ruining the strength of individual parts, including a rotor hub, includes a cylinder support portion 27 provided on a rotor hub 10, a support point 31 thereof being located away from a front end face 22 (unsupported end) of the rotor hub 10 on the opposite side of the rotor hub 10; a decentered coupling point 34 provided at a decentered location on a root-side end face llb of the wind turbine blade 11; and a cylinder 35 that is installed so as to pass through the unsupported end 22 of the rotor hub 10, a coupling portion 30 that is provided on a portion that protrudes to the outer side from the unsupported end 22 being coupled in a freely rotatable manner to the support point 31 via a spherical joint 39, and a coupling portion 40 that is on the inner side of the unsupported end 22 being coupled in a freely rotatable manner to the decentered coupling point 34 via a spherical joint 41. |
