Rotor blade element for a wind turbine, rotor blade, and a production process therefor and wind turbine with rotor blade

Patent metadata

Field	Value
Publication number	US-2016208773-A1
Application number	US-201414913668-A
Country	US
Kind code	A1
Filing date	Aug 1, 2014
Priority date	Aug 28, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

A rotor blade element, in particular produced by a process according to claim 10, in particular a rotor blade edge for a wind turbine, with a base comprising a fiber material saturated with curable resin and with a surface foil, with, arranged between base and surface foil, a bonding layer. The invention proposes that the surface foil comprises polyethylene with ultra-high molecular weight and that the bonding layer comprises a first rubber layer and a second rubber layer, where the first rubber layer is allocated to the surface foil and the second rubber layer is allocated to the base.

First claim

1 . A rotor blade element, comprising:
a base including a fiber material saturated with curable resin; a surface foil including ultra-high molecular weight polyethylene over the base; a bonding layer arranged between the base and the surface foil, the bonding layer including a first rubber layer and a second rubber layer, wherein the first rubber layer is bonded to the surface foil and the second rubber layer is bonded to the base.

2 . The rotor blade element according to claim 1 , wherein a degree of vulcanization of the first rubber layer is higher than or equal to a degree of vulcanization of the second rubber layer.

3 . The rotor blade element according to claim 2 , wherein the first rubber layer is bonded directly to the surface foil and the second rubber layer is bonded directly to the base.

4 . The rotor blade element according to claim 1 , wherein at least one of the first and second rubber layers include ethylene-propylene-diene rubber.

5 . The rotor blade element according to claim 1 , wherein the curable resin is a reactive resin.

6 . The rotor blade element according to claim 1 , wherein bonding of the first rubber layer to the surface foil occurs via mechanical adhesion and bonding of the second rubber layer to the base occurs via crosslinking reactions.

7 . The rotor blade element according to claim 1 , wherein the rotor blade element is selected from the group consisting of:
a fillet, an external rotor blade shell, a half-shell for a pressure side or for a suction side, a rear rotor blade edge, a rotor blade tip, and a leading rotor blade edge.

8 . A rotor blade comprising a rotor blade element according to claim 1 .

9 . A wind turbine comprising rotor blade including a rotor blade element according to claim 1 .

10 . A process for producing a rotor blade or rotor blade element, the process comprising:
bonding an unvulcanized first rubber layer on a first side of a surface foil to form a composite, the surface foil including polyethylene with ultra-high molecular weight; vulcanizing the unvulcanized first rubber layer to provide a first vulcanized rubber layer; forming a base by saturating a fiber material with a curable resin; curing the curable resin; bonding a second unvulcanized rubber layer on at least one of the base and the composite; bonding the composite to the base in such a way that the location of the second unvulcanized rubber layer is between the base and the composite; and vulcanizing the second unvulcanized rubber layer to give a second vulcanized rubber layer.

11 . The process according to claim 10 , wherein vulcanizing the first rubber layer takes place at higher temperatures and high pressures than vulcanizing the second rubber layer.

12 . The process according to claim 10 , wherein curing the resin and vulcanizing the second unvulcanized rubber layer occur in a single step.

13 . The process according to claim 10 , wherein bonding the first unvulcanized rubber layer on the first side of the surface foil takes place by way of mechanical adhesion, and wherein bonding the second unvulcanized rubber layer to the at least one of the base and the composite takes place by way of crosslinking.

14 . The rotor blade element according to claim 1 , wherein the rotor blade element is a rotor blade edge of a rotor blade for a wind turbine.

15 . The rotor blade element according to claim 5 , wherein the reactive resin is an epoxy resin.

Assignees

• Wobben Properties Gmbh

Inventors

• Theile Benjamin
• Hoffmann Alexander

Classifications

• F03D1/0675 Primary

  of the blades · CPC title

• B32B2260/048

  Natural or synthetic rubber · CPC title

• B32B2260/021

  Fibrous or filamentary layer · CPC title

• B32B2307/714

  Inert, i.e. inert to chemical degradation, corrosion · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title