Rotor blade assembly having internal loading features

Patent metadata

Field	Value
Publication number	US-9651024-B2
Application number	US-201414251752-A
Country	US
Kind code	B2
Filing date	Apr 14, 2014
Priority date	Apr 14, 2014
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

Rotor blade assemblies and wind turbines are provided. A rotor blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord, the exterior surfaces defining an interior of the rotor blade. The rotor blade assembly further includes a loading assembly, the loading assembly including a weight disposed within the interior and movable generally along the span of the rotor blade, the weight connected to a rotor blade component such that movement of the weight towards the tip causes application of a force to the rotor blade component by the weight. Centrifugal force due to rotation of the rotor blade biases the weight towards the tip.

First claim

What is claimed is:

1. A rotor blade assembly, comprising:
a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord, the exterior surfaces defining an interior of the rotor blade; and
a loading assembly, the loading assembly comprising a weight disposed within the interior and movable generally along the span of the rotor blade, the weight connected to a rotor blade component such that movement of the weight towards the tip causes application of a force to the rotor blade component by the weight, the loading assembly further comprising a ratchet wherein the weight is movable relative to the ratchet towards the tip or further comprising a pulley operable to modify a direction of the application of the force blade component by the weight,
wherein centrifugal force due to rotation of the rotor blade biases the weight towards the tip.

2. The rotor blade assembly of claim 1 , wherein the loading assembly further comprises a ratchet wherein the weight is movable relative to the ratchet towards the tip and further comprises a pulley operable to modify a direction of the application of the force to the rotor blade component by the weight.

3. The rotor blade assembly of claim 1 , wherein the loading assembly further comprises a connector connecting the weight and the rotor blade component.

4. The rotor blade assembly of claim 1 , wherein the force is a tensile force.

5. The rotor blade assembly of claim 1 , wherein the rotor blade comprises a tip segment comprising the tip, a root segment comprising the root, and an intermediate segment between the tip segment and the root segment.

6. The rotor blade assembly of claim 5 , wherein the weight is disposed within the tip segment.

7. The rotor blade assembly of claim 5 , wherein the intermediate segment comprises a fabric and a plurality of structural members.

8. The rotor blade assembly of claim 7 , wherein the rotor blade component is the fabric.

9. The rotor blade assembly of claim 7 , wherein the rotor blade component is one of the plurality of structural members.

10. A rotor blade assembly, comprising:
a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord, the exterior surfaces defining an interior of the rotor blade, the rotor blade further comprising a tip segment comprising the tip, a root segment comprising the root, and an intermediate segment between the tip segment and the root segment, the intermediate segment comprising a fabric and a plurality of structural members; and
a loading assembly, the loading assembly operable to tension the intermediate segment during rotation of the rotor blade, the loading assembly comprising a ratchet.

11. The rotor blade assembly of claim 10 , wherein the loading assembly comprising a weight disposed within the interior and movable generally along the span of the rotor blade, the weight connected to one of the fabric or one of the plurality of structural members such that movement of the weight towards the tip causes application of a tensile force to the one of the fabric or one of the plurality of structural members by the weight, wherein centrifugal force due to rotation of the rotor blade biases the weight towards the tip.

12. The rotor blade assembly of claim 11 , wherein the weight is movable relative to the ratchet towards the tip.

13. The rotor blade assembly of claim 11 , wherein the loading assembly further comprises a connector connecting the weight and the rotor blade component.

14. The rotor blade assembly of claim 11 , wherein the weight is disposed within the tip segment.

15. A wind turbine, comprising:
a tower;
a nacelle mounted on the tower; and
a plurality of rotor blades, each of the plurality of rotor blades having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, each of the plurality of rotor blades defining a span and a chord, the exterior surfaces of each of the plurality of rotor blades defining an interior of each of the plurality of rotor blades; and
a loading assembly, the loading assembly comprising a weight disposed within the interior of one of the plurality of rotor blades and movable generally along the span of the one of the plurality of rotor blades, the weight connected to a rotor blade component such that movement of the weight towards the tip causes application of a force to the rotor blade component by the weight, the loading assembly further comprising a ratchet wherein the weight is movable relative to the ratchet towards the tip or further comprising a pulley operable to modify a direction of the application of the force to the rotor blade component by the weight,
wherein centrifugal force due to rotation of the one of the plurality of rotor blades biases the weight towards the tip.

16. The wind turbine of claim 15 , wherein the loading assembly further comprises a ratchet wherein the weight is movable relative to the ratchet towards the tip and further comprises a pulley operable to modify a direction of the application of the force to the rotor blade component by the weight.

17. The wind turbine of claim 15 , wherein the rotor blade comprises a tip segment comprising the tip, a root segment comprising the root, and an intermediate segment between the tip segment and the root segment, and wherein the weight is disposed within the tip segment.

18. The wind turbine of claim 15 , wherein the rotor blade comprises a tip segment comprising the tip, a root segment comprising the root, and an intermediate segment between the tip segment and the root segment, and wherein the intermediate segment comprises a fabric and a plurality of structural members.

Assignees

• Gen Electric

Inventors

• Soloway Daniel David

Classifications

• F05B2240/312

  capable of being reefed · CPC title

• F05B2240/311

  flexible or elastic · CPC title

• Y02E10/721

  Cross-Sectional Technologies · mapped topic

• F03D1/0675 Primary

  of the blades · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title