Patent ID: 11946455
Assignee: ELECTRIC POWER DEVELOPMENT CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A wind energy generation system comprising:
a tower;
a nacelle provided in an upper portion of the tower to be rotatable around a central axis of the tower;
a hub provided in front of the nacelle to be rotatable around an axis orthogonal to the central axis;
one or more blades provided in the hub, wherein the hub includes a hub body portion to which the blades are attached,
a fitting protruding portion that protrudes from a back surface side of the hub body portion,
a fitting portion having an opening portion is provided in front of the nacelle, and
the fitting protruding portion is fitted into the fitting portion from the opening portion,
wherein the fitting portion in a bottom portion of the nacelle includes a tip portion that extends horizontally from the opening portion to the back surface side, and an inclined portion that extends from a rear end of the tip portion and has a height lower than the tip portion, and a boundary between the tip portion and the inclined portion is located closer to the hub body portion side than a tip of the fitting protruding portion on the back surface side.