Rotor blade for a wind turbine

Patent metadata

Field	Value
Publication number	US-9234497-B2
Application number	US-201213490581-A
Country	US
Kind code	B2
Filing date	Jun 7, 2012
Priority date	Jun 10, 2011
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

A rotor blade for a wind turbine is provided. The rotor blade includes an elongate blade base body with a number of connecting elements each having at least one axially extending connecting portion adapted to be connected with at least one corresponding connecting portion of a rotor hub of a wind turbine, wherein the respective connecting elements are connected to at least two circumferentially extending connecting members with the connecting members being adjacently disposed in circumferential direction so as to build a ring-like shape. Further, a wind turbine with such a rotor blade is provided.

First claim

The invention claimed is:

1. Rotor blade for a wind turbine, comprising:
an elongate blade base body with a plurality of connecting elements, each connecting element comprising at least one axially extending connecting portion adapted to be connected with at least one corresponding connecting portion of a rotor hub of the wind turbine;
a plurality of first connecting members, each extending circumferentially and disposed in a circumferential direction at a first radius to build a first ring-like shape at the first radius,
a plurality of second connecting members, each extending circumferentially and are disposed in a circumferential direction at a second radius to build a ring-like shape at the second radius,
wherein each connecting element is disposed radially between a respective first connecting member and a respective second connecting member, and
wherein each first connecting member and second connecting member is made of metal.

2. The rotor blade according to claim 1 , wherein each first connecting member and second connecting member has the shape of a cylinder-segment or a ring-segment.

3. The rotor blade according to claim 2 , wherein each first connecting member and second connecting member is adapted to transfer externally applied loads in a blade root of the rotor blade.

4. The rotor blade according to claim 3 , wherein each first connecting member and second connecting member is adapted to transfer shear loads in the blade root of the rotor blade.

5. The rotor blade according to claim 2 , wherein each first connecting member and second connecting member has the shape of a half-cylinder-segment or a half-ring-segment.

6. The rotor blade according to claim 1 , wherein the connecting elements are integrally built with a respective first connecting member or mounted to a respective first connecting member.

7. The rotor blade according to claim 6 , wherein each connecting element is integrally built with a respective first connecting member by way of casting.

8. The rotor blade according to claim 6 , wherein each connecting element is welded to the respective first connecting member.

9. The rotor blade according to claim 6 , wherein each connecting element is bolted to the respective first connecting member.

10. The rotor blade according to claim 1 , wherein a blade root ring is attached to at least one face side of the respective first and second connecting members.

11. The rotor blade according to claim 1 , wherein at least one side of a connecting member is provided with a straight shape and/or curved shaped portions.

12. The rotor blade according to claim 1 , wherein at least the surface of a first connecting member and/or the surface of a second connecting member is at least partially provided with a three-dimensional structuring.

13. The rotor blade according to claim 12 , wherein the three-dimensional structuring is in the shape of axially extending recesses and/or radial holes.

14. The rotor blade according to claim 1 , wherein each first connecting member and second connecting member is made of steel.

15. The rotor blade according to claim 1 , wherein the axial edge of each first connecting member is convex or concave shaped.

Assignees

• Grove-Nielsen Erik
• Siemens Ag

Inventors

• Grove-Nielsen Erik

Classifications

• F03D1/0691

  of the hub · CPC title

• Y02E10/721

  Cross-Sectional Technologies · mapped topic

• Y02E10/728

  Onshore wind turbines · CPC title

• F05B2240/90

  Mounting on supporting structures or systems · CPC title

• F05B2240/80

  Platforms for stationary or moving blades · CPC title