System and method for securing a conductive cable within a wind turbine rotor blade

Patent metadata

Field	Value
Publication number	US-9920739-B2
Application number	US-201414574532-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 18, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

The present disclosure is directed to a system and method for securing a lightning protection cable (e.g. a conductor) of a lightning protection system within a wind turbine rotor blade. The lightning protection system includes a plurality of lightning receptors configured along either or both of the pressure or suction sides of the rotor blade. The lightning receptors are connected via the conductor so as to form a conductive circuit. Further, a cover assembly defining a passageway therethrough is configured to receive at least a portion of the conductor along a length thereof. Thus, the cover assembly can be secured to an inner surface of the internal cavity so as to maintain a location of the conductor. Accordingly, the conductor is free to move within the cover assembly since the wire is not directly attached to the rotor blade.

First claim

What is claimed is:

1. A wind turbine rotor blade, comprising:
a root, a tip, and a pressure side and a suction side extending between said tip and said root, said pressure side and said suction side defining an internal cavity;
a plurality of lightning receptors configured along either or both of said pressure side or said suction side;
at least one conductor connected between the plurality of lightning receptors so as to form a conductive circuit; and,
a cover assembly comprising a plurality of cover members, each cover member defining a passageway therethrough, the passageways receiving at least a portion of the conductor along a length thereof each of the cover members comprising opposing flanges on opposite sides of the passageway thereof the passageways of the cover members being open to an inner surface of the internal cavity, the opposing flanges attached to the inner surface of the internal cavity so as to maintain a location of the conductor adjacent to the inner surface of the internal cavity, wherein the conductor is free to move within the cover assembly.

2. The wind turbine rotor blade of claim 1 , wherein the cover members comprise at least one of the following cross-sectional profiles: omega-shaped, square, U shaped, C-shaped, L-shaped, or rectangular.

3. The wind turbine rotor blade of claim 1 , further comprising at least one of an adhesive or a fastener configured between the opposing flanges and the inner surface of the internal cavity.

4. The wind turbine rotor blade of claim 1 , further comprising a bonding material configured atop the cover assembly.

5. The wind turbine rotor blade of claim 4 , wherein the bonding material further comprises at least one of fiberglass laminates, an adhesive, or combinations thereof.

6. The wind turbine rotor blade of claim 1 , wherein at least a portion of the conductor is configured with a shear web of the rotor blade.

7. The wind turbine rotor blade of claim 6 , cover assembly is located between the blade root and an end of the shear web.

8. The wind turbine rotor blade of claim 1 , wherein the cover assembly further comprises a dampening material configured between the portion of the conductor within the passageway of the cover assembly and the inner surface of the internal cavity of the rotor blade.

9. The wind turbine rotor blade of claim 1 , wherein the cover assembly further comprises a dampening material configured between the cover members.

10. The wind turbine rotor blade of claim 1 , wherein the conductive circuit further comprises terminal ends that extend through said root and connect to a grounding system.

11. A system for securing a conductor within a rotor blade of a wind turbine, the system comprising:
at least one conductor connected between a plurality of lightning receptors so as to form a conductive circuit; and,
a cover assembly comprising a plurality of cover members, each cover member defining a passageway therethrough, the passageways configured to receive at least a portion of the conductor along a length thereof, each of the cover members comprising opposing flanges on opposite sides of the passageway thereof, the passageways of the cover members being open to an inner surface of the internal cavity such that when the opposing flanges are attached to the inner surface of the rotor blade to maintain a location of the conductor, the conductor is free to move within the cover assembly.

12. The system of claim 11 , wherein the cover members comprise at least one of the following cross-sectional profiles: omega-shaped, square, U-shaped, C-shaped, L-shaped, or rectangular.

13. The system of claim 11 , wherein the opposing flanges are secured to the inner surface via at least one of an adhesive or a fastener.

14. The system of claim 11 , further comprising a bonding material configured atop the cover assembly, wherein the bonding material further comprises at least one of fiberglass laminates, an adhesive, or combinations thereof.

15. The system of claim 11 , wherein at least a portion of the conductor is configured with a shear web of the rotor blade, wherein the cover assembly is located between the blade root and an end of the shear web.

16. The system of claim 11 , wherein the cover assembly further comprises a dampening material.

17. A method for installing a lightning protection system of a wind turbine, the method comprising:
securing a plurality of lightning receptors along either or both of a pressure side or a suction side of a rotor blade;
connecting the plurality of lightning receptors via at least one conductor so as to form a conductive circuit;
inserting the conductor within passageways of cover members of a cover assembly, each of the cover members comprising opposing flanges on opposite sides of the passageways; and,
securing the opposing flanges of the cover members to an inner surface of an internal cavity of the rotor blade with the passageways of the cover members being open to the inner surface of the internal cavity such that when the opposing flanges are secured to the inner surface, the conductor is free to move within the cover assembly.

Assignees

• Gen Electric

Inventors

• Akhtar Afroz
• Kavala Venkateswara Rao
• Maiti Parnasree

Classifications

• F03D1/0675

  of the blades · CPC title

• F03D13/10 Primary

  Assembly of wind motors; Arrangements for erecting wind motors · CPC title

• F03D80/30

  Lightning protection · CPC title

• Y02E10/721

  Cross-Sectional Technologies · mapped topic

• F03D1/001 Primary

  Mechanical Engineering · mapped topic