Wind power generator

Abstract

This wind power generator comprises: a nacelle that houses a generator; a tower, the top end section thereof being connected to the nacelle and the bottom end section being fastened to a base section; and a rotor that is located on the downwind side of the nacelle during normal operation, and that by receiving the force of the wind and rotating, drives the generator. The rotor has a hub that is supported such that it can rotate, and a plurality of blades that are arranged such that they extend radially from the hub. The blades, when not loaded, are pre-bent blades that are formed such that the middle section of each blade is curved outward with respect to a straight line that connects the root end section of the blade that is attached to the hub and the tip end section on the outer diameter side of the rotor, with a specified coning angle being applied to the blade.

1 . A wind power generator comprising:
 a tower having a top end portion and a bottom end portion, said bottom end portion being fixed to a base;   a power generator main body supported by the top end portion side of the tower;   a rotor having a hub rotatably supported by the power generator main body, and a plurality of blades each of which extends radially from the rotor, wherein the rotor rotates when the blades receive wind; and   a power generator provided on the power generator main body and driven by a rotation of the rotor to generate electric power,   wherein the rotor is located on a downwind side relative to the power generator main body,   wherein each of the blades has a radial proximal end portion fixed to the hub, a radial distal end portion, and an intermediate section which extends between the radial proximal end portion and the radial distal end portion, and   wherein the intermediate section of each blade is curved such that in an unloaded state, the intermediate section overhangs toward the downwind side relative to an imaginary straight line that connects the proximal end portion and the distal end portion, and a portion which is adjacent to the radial proximal end of each blade is inclined toward the downwind side relative to an imaginary plane surface which is perpendicular to the rotational axis of the rotor.