Methods of manufacturing rotor blade components for a wind turbine

Patent metadata

Field	Value
Publication number	US-9709030-B2
Application number	US-201414318964-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Dec 16, 2013
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Methods of manufacturing rotor blade components for a wind turbine and rotor blade components produced in accordance with such methods are disclosed. In one embodiment, the method generally includes providing a mold of the rotor blade component; coating at least a portion of an interior surface of the mold with an elastomeric material; inserting impletion material within the mold so as to at least partially reduce an open internal volume within the mold; inserting a foam material within the mold; and, removing the rotor blade component from the mold, wherein the elastomeric material forms a cover skin around at least a portion of the rotor blade component. In an alternative embodiment, the method includes providing at least one support member defining a profile for the rotor blade component on a mold surface; coating at least a portion of the support member with an elastomeric material; and, allowing the elastomeric material to cure on the mold surface so as to form the rotor blade component.

First claim

What is claimed is:

1. A method of manufacturing a rotor blade component for a rotor blade of a wind turbine, the method comprising:
providing a mold of the rotor blade component;
coating at least a portion of an interior surface of the mold with an elastomeric polyurea material;
inserting impletion material within the mold so as to contact the elastomeric polyurea material and at least partially reduce an open internal volume within the mold;
after inserting the impletion material, inserting a foam material within the mold in contact with the impletion material and the elastomeric polyurea material so as to form the rotor blade component; and
removing the rotor blade component from the mold, wherein the elastomeric polyurea material forms a cover skin around at least a portion of the rotor blade component.

2. The method of claim 1 , wherein inserting impletion material comprises securing the impletion material in place within the open internal volume.

3. The method of claim 2 , wherein securing the impletion material divides the open internal volume into a plurality of chambers.

4. The method of claim 3 , wherein inserting the foam material within the mold comprises inserting foam material into at least two of the plurality of chambers.

5. The method of claim 1 , wherein the impletion material comprises a compressible material.

6. The method of claim 5 , wherein at least some of the impletion material at least partially compresses when foam material is inserted within the mold.

7. The method of claim 1 , wherein the impletion material comprises one or more foam preforms.

8. The method of claim 1 , wherein the impletion material comprises one or more hollow elements.

9. The method of claim 1 , further comprising assembling one or more support members within the mold before inserting the foam material within the mold.

10. The method of claim 1 , wherein the rotor blade component comprises one of a rotor blade shell, a leading edge extension, a trailing edge extension, a blade root enhancement, a low-load bump, a winglet, a vortex generator, or an airflow modifying element.

11. A rotor blade component for a rotor blade of a wind turbine, the rotor blade component comprising:
a body defining a profile of the rotor blade component, the body comprising an internal volume;
an impletion material configured within the body to at least partially reduce the internal volume;
a foam material configured within the internal volume of the body in contact with the impletion material; and
a cover skin surrounding and contacting at least a portion of the foam material and the impletion material, and defining an exterior surface of the rotor blade component, the cover skin comprising an elastomeric polyurea material,
wherein the rotor blade component is configured to flex with the rotor blade during operation of the wind turbine.

12. The rotor blade component of claim 11 , wherein the impletion material is secured in place within the internal volume.

13. The rotor blade component of claim 12 , wherein the secured impletion material divides the internal volume into a plurality of chambers.

14. The rotor blade component of claim 13 , wherein the foam material is configured within at least two of the plurality of chambers.

15. The rotor blade component of claim 11 , wherein the impletion material comprises a compressible material.

16. The rotor blade component of claim 15 , wherein at least a portion of the impletion material is at least partially compressed by the foam material.

17. The rotor blade component of claim 11 , wherein the impletion material comprises one or more foam preforms.

18. The rotor blade component of claim 11 , wherein the impletion material comprises one or more hollow elements.

19. The rotor blade component of claim 11 , further comprising one or more support members within the foam material.

20. The rotor blade component of claim 11 , wherein the rotor blade component comprises one of a rotor blade shell, a leading edge extension, a trailing edge extension, a blade root enhancement, a low-load bump, a winglet, a vortex generator, or an airflow modifying element.

Assignees

• Gen Electric

Inventors

• Tobin James Robert
• Fischetti Thomas Joseph
• Gobeli William Max

Classifications

• Y02E10/721

  Cross-Sectional Technologies · mapped topic

• F05B2280/6012

  Foam · CPC title

• B29K2105/04

  cellular or porous · CPC title

• F05B2280/4003

  Synthetic polymers, e.g. plastics · CPC title

• B29K2675/00

  Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof,} for preformed parts, e.g. for inserts · CPC title