Wind turbine blade and wind turbine

Patent metadata

Field	Value
Publication number	US-11549482-B2
Application number	US-202016825164-A
Country	US
Kind code	B2
Filing date	Mar 20, 2020
Priority date	Mar 21, 2019
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A wind turbine blade of a wind turbine, the wind turbine blade including a shell and a spar having at least one spar cap is provided. At least one of the at least one spar cap includes at least two longitudinal support structure elements, whereby at least two of the at least two longitudinal support structure elements are arranged adjacent to one another in a longitudinal direction of the wind turbine blade and at least one longitudinal support structure includes carbon fiber-reinforced plastic and at least one other longitudinal support structure includes at least one fiber-reinforced plastic different from carbon fiber-reinforced plastic.

First claim

The invention claimed is:

1. A wind turbine blade of a wind turbine, the wind turbine blade comprising:
a shell; and
a spar having at least one spar cap,
wherein at least one of the at least one spar cap comprises at least two adjacent longitudinal support structure elements, whereby one of the at least two longitudinal support structure elements is arranged in a space formed in an adjacent support structure element to merge the at least two longitudinal support structure elements together such that the at least two longitudinal support structures themselves form a structural joint therebetween so that the at least two longitudinal support structures are connected to one another in a longitudinal direction of the wind turbine blade, and at least one longitudinal support structure comprises carbon fiber-reinforced plastic and at least one other longitudinal support structure comprises at least one fiber-reinforced plastic different from carbon fiber-reinforced plastic.

2. The wind turbine blade according to claim 1 , wherein at least one of the at least one longitudinal support structure comprising carbon fiber-reinforced plastic is predominantly comprising carbon fiber-reinforced plastic as fiber-reinforced plastic and at least one of the at least one other longitudinal support structure comprising at least one fiber-reinforced plastic different from carbon fiber-reinforced plastic is predominantly comprising fiber-reinforced plastics different from carbon fiber-reinforced plastic as fiber-reinforced plastic.

3. The wind turbine blade according to claim 1 , wherein the structural joint is resin molded.

4. The wind turbine blade according to claim 1 , wherein the at least two adjacent longitudinal support structure elements are arranged at an arrangement angle of 0.5° ≤α≤10° with respect to each other.

5. The wind turbine blade according to claim 1 , wherein the at least one fiber-reinforced plastic comprises at least one unidirectional glass mat and/or the carbon fiber-reinforced plastic comprises at least one pultruded carbon fiber element.

6. The wind turbine blade according to claim 1 , wherein a length of at least two of the at least two adjacent longitudinal support structure elements is different from one another.

7. The wind turbine blade according to claim 1 , wherein the at least one longitudinal support structure comprising carbon fiber-reinforced plastic terminates at least 5 m from a tip of the wind turbine blade.

8. The wind turbine blade according to claim 1 , wherein at least one end portion of at least one of the at least two adjacent longitudinal support structure elements is tapered in a longitudinal direction and/or with a tapering angle of 0.2° ≤β≤5° .

9. The wind turbine comprising at least two wind turbine blades according to claim 1 .

Assignees

• Siemens Gamesa Renewable Energy As

Inventors

• Girolamo Donato
• Kristensen Jens Jørgen Østergaard

Classifications

• F05B2280/6003

  Composites; e.g. fibre-reinforced · CPC title

• F03D1/0641 Primary

  of the section profile of the blades, i.e. aerofoil profile · CPC title

• F05B2250/02

  variable · CPC title

• F05B2240/40

  Use of a multiplicity of similar components · CPC title

• F05B2280/60

  Properties or characteristics given to material by treatment or manufacturing · CPC title