Method for producing a rotor blade of a wind turbine

Patent metadata

Field	Value
Publication number	US-12420492-B2
Application number	US-202118035306-A
Country	US
Kind code	B2
Filing date	Nov 2, 2021
Priority date	Nov 13, 2020
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A method for producing a rotor blade of a wind turbine includes the following steps: a) providing at least two different components of the rotor blade, b) placing a resistive element between the components, c) placing a thermoplastic or weldable thermoset resin between the components, d) energizing the resistive element so that the resistive element applies heat to the thermoplastic or weldable thermoset resin to melt or to soften it, and e) joining the components together by means of the molten or softened thermoplastic or weldable thermoset resin.

First claim

The invention claimed is:

1. A method for producing a rotor blade of a wind turbine, the method comprising:
providing at least two different components of the rotor blade, wherein the at least two different components comprise a first half-shell and a second half-shell;
providing a structure between the first half-shell and the second-half shell, wherein the structure comprises a structural element, a resistive element, and a resin strip, wherein the resistive element is disposed between, and is embedded in both, the structural element and the resin strip, wherein the resin strip is in direct mechanical contact with the first half-shell, wherein the structural element comprises fiber composite material, and wherein the resistive element comprises copper or carbon fibers;
placing a mold on, and in direct mechanical contact with, an outer surface of the first half-shell;
simultaneously: (i) energizing the resistive element so that the resistive element applies heat to the resin strip to soften the resin strip and (ii) applying pressure to the mold in a direction toward the first half-shell; and
after completion of said simultaneously energizing the resistive element and applying pressure to the mold, cooling the resin strip and removing the mold.

2. The method according to claim 1 , wherein the resin strip is a continuous strip of thermoplastic or weldable thermoset resin.

3. The method according to claim 1 , wherein the resistive element has a form of wires or a mesh.

4. The method according to claim 2 , wherein the thermoplastic or weldable thermoset resin is placed between the at least two different components by creating resin-rich surface layers on at least one of the at least two different components.

5. The method according to claim 1 , wherein the resistive element remains in the rotor blade.

6. The method according to claim 1 , wherein the resistive element comprises resin-coated wires that are placed between the structural element and the resin strip.

Assignees

• Siemens Gamesa Renewable Energy Innovation & Technology SL

Inventors

• Gaztelumendi Lecuona Jose Javier
• Arslaner Kerem
• Bosboom Matthijs
• Hierro-Olabarria Salgado Francisco Javier
• Minnema Henk

Classifications

• B29L2031/085

  Wind turbine blades · CPC title

• B29C65/70

  by moulding (using a particular moulding technique, see the relevant technique {, e.g. by injection B29C45/14467}) · CPC title

• B29C65/48

  using adhesives {, i.e. using supplementary joining material; solvent bonding} · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title