Rotor blade coating

Abstract

The present invention relates to a rotor blade which has a coating, to a corresponding method for producing the coating, and to a method for heating and/or deicing the outer surface of the rotor blade and/or an outermost layer applied onto the outer surface of the rotor blade. The task underlying the invention is to develop a functional multi-layered coating that constitutes a comprehensive protection against the various environmental influences. The task is accomplished by a rotor blade which has an outer surface and by an at least two-layered coating applied onto the outer surface, having a first adhesion-facilitating metal layer and/or a first adhesion-facilitating layer which has electric heating elements and a second metal layer, wherein the first adhesion-facilitating metal layer and/or the first adhesion-facilitating layer which has electric heating elements is arranged between the outer surface of the rotor blade and the second metal layer.

Claims

1. A rotor blade having an outer surface and an at least two-layered coating applied onto the outer surface, wherein the at least two-layered coating comprises: a first adhesion-facilitating metal layer or a first adhesion-facilitating layer having electric heating elements; a second metal layer, wherein the first adhesion-facilitating metal layer or the first adhesion-facilitating layer having electric heating elements is arranged between the outer surface of the rotor blade and the second metal layer; and a mechanically attenuating layer being provided or applied between the first adhesion-facilitating metal layer and the second metal layer.

2. The rotor blade according to claim 1, wherein the second metal layer or every additional layer arranged on top of the second metal layer has a thermal conductivity of at least 100 to 400 W/(mK), or the second metal layer and every existing additional layer together have a combined thermal conductivity of at least 30 W/(mK).

3. The rotor blade according to claim 1, wherein an outermost layer of the coating has a Vickers hardness of at least 100.

4. The rotor blade according to claim 1, wherein the electric heating elements are mutually interconnected, wherein the heating elements extend over a surface of at least 0.02% of the outer surface of the rotor blade.

5. The rotor blade according to claim 1, wherein the first adhesion-facilitating metal layer the first adhesion-facilitating layer having electric heating elements is at least, in part, a thermally sprayed layer, or the second metal layer is a layer applied by a cold gas spraying process.

6. The rotor blade according to claim 1, wherein the second metal layer is electrically coupled with a lightning conduction device, or the first adhesion-facilitating metal layer or the first adhesion-facilitating layer having electric heating elements is coupled with at least one device for conducting current through the first adhesion-facilitating metal layer or through the electric heating elements, or the rotor blade comprises means for establishing an electrical connection between the first adhesion-facilitating metal layer or the first adhesion-facilitating layer having electric heating elements and at least one device for conducting current through the first adhesion-facilitating metal layer or through the electric heating elements, wherein the at least one device, the means, or the rotor blade are arranged such that the current causes a heating of the second metal layer or a deicing of the outer surface of the rotor blade or of the outermost layer.

7. A wind power plant featuring a tower and a nacelle and at least two rotor blades that are fastened to the nacelle so as to be rotatable around a joint axis or includes coated rotor blades according to claim 1.

8. The rotor blade according to claim 2, wherein the second metal layer and every existing additional layer together have a combined thermal conductivity of at least 100 W/(mK).

9. The rotor blade according to claim 8, wherein the second metal layer and every existing additional layer together have a combined thermal conductivity of 100 to 400 W/(mK).

10. The rotor blade according to claim 3, wherein the second metal layer forms the outermost layer.

11. The rotor blade according to claim 4, wherein the electric heating elements form a network structure.

12. The rotor blade according to claim 1, wherein the mechanically attenuating layer is a shock-absorbing intermediate layer.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) FIG. 1 exemplarily shows a possible structure as a partial section of a rotor blade.

DETAILED DESCRIPTION

(2) FIG. 1 shows a cross section of a part of the rotor blade. A first part of the rotor blade 1 is identifiable, made out of a glass fiber-reinforced synthetic material. Without further coating, this glass fiber-reinforced synthetic material forms the outer surface 2. According to the invention, this surface is referred to as outer surface 2 even when a coating is present. Applied onto it is a first adhesion-facilitating layer 3. Applied onto that layer is an intermediate layer 4, onto which a second metal layer 5 is applied, which, after their application, form the outer surface of the coated rotor blade.