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

Claim 2:
3. 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, and
one or more weir portions formed in protrusion shapes, which rise from a tip portion of the fitting portion in a bottom portion of the nacelle and extend in a circumferential direction of the opening portion are provided in the fitting portion.