Patent ID: 8308434
Filing Date: 2012-11-13
Classification: F03D,F05B,Y02B,Y02E

Abstract:
1. An upwind wind turbine generator that is controlled such that a wind turbine rotor blade faces an upwind side, comprising: a rotor head equipped with wind turbine blades, to constitute the wind turbine rotor blades; a nacelle that bears a rotation shaft of the rotor head and houses a generator that generates electricity by a rotation of the rotor head; a tower that supports the nacelle; a rotor head cover that covers the rotor head; an outside-air intake that is provided on a distal end part of the rotor head cover and takes in outside wind; an outside-air delivery communicating part that delivers outside air, which has been taken into the rotor head cover from the outside-air intake, to an inside of the nacelle; a cooling air outlet that is provided in a region of an outer surface of the nacelle that experiences a negative pressure due to outside wind; and a rotor-head-cover internal air duct, wherein the outside-air delivery communicating part has: wherein the air delivering hole and the air receiving hole have a shape that allows communication between the air delivering hole and at least a part of the air receiving hole all the time regardless of a rotational position of the rotor head cover, wherein the rotor-head-cover internal air duct communicates with the air delivering hole through a space between the rotor head and the rotor head cover from the outside-air intake, and wherein the rotor head has a structure sealed against the rotor-head-cover internal air duct.