Wind turbine rotor blade with a rotor blade connection and method for producing same
AssigneeWobben Properties GmbH
InventorAlexander Hoffmann
Life of this patent
Estimating the term…
Abstract
A wind turbine rotor blade with a rotor blade tip, a rotor blade root, and a rotor blade connection in the region of the rotor blade root with a rotationally symmetrical flange coupling is provided which has a first and a second end. The first end of the flange coupling has multiple bores for receiving fastening means for fastening to a hub of a wind turbine. The second end is fastened in or on material of the rotor blade root. The second end extends in the direction of an axis of rotation of the flange coupling.
Claims15
A wind turbine rotor blade comprising:
- a rotor blade tip;
- a rotor blade root;
- and
- a rotationally symmetrical flange coupling having a first end and a second end, the flange coupling being a single piece of cast metal or a single piece of nodular graphite,
- wherein the second end extends in a direction of an axis of rotation of the flange coupling and is fastened in or on a material of the rotor blade root, and
- wherein the first end of the flange coupling has two arms, each of the two arms having a front side and a plurality of bores at the front side, wherein the plurality of bores are configured to receive fasteners to fasten the wind turbine rotor blade to the hub of the wind turbine,
- wherein the flange coupling directly couples the wind turbine rotor blade to the hub of the wind turbine.
A method for producing a wind turbine rotor blade with a rotor blade connection having a rotationally symmetrical flange coupling, the method comprising:
- casting the flange coupling as a single piece from metal or producing the flange coupling as a single piece in a nodular graphite casting process, the flange coupling having a first end and a second end, wherein the first end has two arms, each of the two arms having a front surface and a plurality of bores at the first surface, the plurality of bores being configured to receive fasteners for fastening the wind turbine rotor blade to a hub of a wind turbine,
- placing the flange coupling on a winding core, and
- embedding the second end in a fiber-reinforced composite during a winding of a rotor blade root region of the wind turbine rotor blade, wherein the second end is oriented such that the second end extends in a direction of an axis of rotation of the flange coupling, wherein the first end of the flange coupling extends away from the wind turbine rotor blade,
- wherein the flange coupling is configured to directly couple the wind turbine rotor blade to the hub of the wind turbine.
A method for producing a wind turbine rotor blade with a rotor blade connection having a rotationally symmetrical flange coupling, the method comprising:
- casting the flange coupling as a single piece from metal or producing the flange coupling as a single piece in a nodular graphite casting process, the flange coupling having a first end and a second end, wherein the first end has two arms, wherein the flange coupling is configured to directly couple the wind turbine rotor blade to the hub of the wind turbine.
Dependencies are inferred from the claim text.