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

Claim 3:
4. 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,
a cylindrical hub fitting member is fitted to the back surface side of the hub body portion to form the fitting protruding portion,
a cylindrical nacelle fitting member is fitted into the fitting portion along the opening portion,
wherein the fitting protruding portion fitted into the fitting portion from the opening portion is inserted into the nacelle fitting member.