Hitachi, Ltd.

Fuji Jukogyo Kabushiki Kaisha

Ikuo Tobinaga

Shigeo Yoshida

Kohei Tanaka

Mitsuru Saeki

Masakazu Kita

Tsukasa Uenaka

Atsuki Tomizawa

Juhyun Yu

Souichiro Kiyoki

Kouta Ishiguro

Yasuaki Nakanishi

A wind power generation system according to the invention includes: blades configured to receive wind to rotate; a nacelle supporting a load from the blades; a tower supporting the nacelle; a hub supporting the blades and configured to be rotated with the blades; a rotary main shaft configured to be rotated with the rotation of the hub; a gearbox connected to the rotary main shaft and configured to increase a speed of the rotation; and a generator configured to be driven at the rotation speed increased by the gearbox. The rotary main shaft is connected directly to the hub.

Wind power generation system

A method for constructing an offshore wind turbine includes: attaching all or a part of electrical products to a tower on land; stowing, on a work platform, the tower to which the electrical product is attached; and disposing, on a foundation, the tower, to which the electric product is attached, by using a crane of the work platform in the sea. In addition, the electrical products are classified into special high-voltage devices and the other electrical products, the special high-voltage devices are modularized on land, the other electrical products are attached to the tower on land, and the modularized special high-voltage devices and the tower, to which the other electrical products are attached, are disposed on the foundation by using the crane of the work platform in the sea.

Offshore wind turbine, method for constructing offshore wind turbine, and offshore wind power generator

A wind turbine system includes blades which rotate by receiving wind, a nacelle which supports the blades and rotates with the blades, a main shaft for transmitting torque which is connected to the hub and is rotated by the rotation of the hub, and a generator which generates electricity using rotating energy of the main shaft, wherein the main shaft is connected to the hub inside the hub in the axial direction of the main shaft.

Wind turbine system, an assembling method of a wind turbine system, an inspecting method of a wind turbine system, and an operation method of a wind turbine system

The object of the invention is to provide a wind power generator whose yaw bearing can be replaced by a simple device. A wind power generator has a nacelle, a tower that supports the nacelle at a high location, a yaw bearing that is located between a first bearing seat that is provided on the bottom section of the nacelle and a second bearing seat that is provided on the top section of the tower, first and second jack seats that extend to the outer diameter side of the first and second bearing seats, a jack-up unit that is located between the first and second jack seats so that there is a space though which the yaw bearing can be removed or installed in the radial direction of the yaw bearing, and that can jack up the nacelle, and a suspension unit that is provided on the nacelle and that can move while suspending the yaw bearing.

Wind power generator and yaw bearing replacement method for a wind power generator

To provide a lightweight hub of a horizontal axis wind turbine with a balanced strength, the hubrelated to the present invention comprises a reinforcement platecoupled to the spherical shellon the peripheral edge in the round region G inside the circular flangeused to secure a blade. In addition to being off-center at the point C side, an off-center opening, that contains the center B of the region G, is formed in the region G. The reinforcement plateis formed at the remainder portion of the region G after removing the off-center opening. By means of an unequal arrangement of the reinforcement plateand the openingon the inside of the circular flange, severe imbalances due to the casting of the hubare cancelled and a balanced strength is obtained, making it also easier to reduce the weight.

Growing community of inventors

Tokyo, Japan

Ikuo Tobinaga