Method for making an equipotential bonding connection on a wind turbine rotor blade and wind turbine rotor blade having an equipotential bonding connection

Patent metadata

Field	Value
Publication number	US-10697441-B2
Application number	US-201715853269-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 22, 2016
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

The invention is directed to a method for making an equipotential bonding connection between two components of a lightning protection arrangement of a wind turbine rotor blade. The method includes providing a wind turbine rotor blade having two rotor blade half shells having respective connection and fastening units connected to corresponding ones of the two components of the lightning protection arrangement. A space is present in the interior of the rotor blade between the two connection and fastening units. A connection conductor is introduced from outside of the rotor blade through a through opening in one of the two connection and fastening units into the interior space of the wind turbine rotor blade. The two ends of the connection conductor are fastened to corresponding ones of the connection and fastening units such that the connection conductor bridges the interior space along an essentially linear imaginary line.

First claim

What is claimed is:

1. A method for making an equipotential bonding connection between two components of a lightning protection arrangement of a wind turbine rotor blade, the method comprising the following steps to be performed in a sequence set forth below: a) providing a wind turbine rotor blade which includes two rotor blade half shells with each half shell having a connection and fastening unit connectable to one of the two components of the lightning protection arrangement, wherein a space is provided in an interior of the wind turbine rotor blade between the two connection and fastening units; b) inserting a connection conductor from outside of the wind turbine rotor blade through a through opening in one of the two connection and fastening units into the interior of the wind turbine rotor blade; and, c) fastening two ends of the connection conductor to corresponding ones of the connection and fastening units such that the connection conductor bridges the space; wherein one of the two components is a lightning receptor 20 which, after step c), is fastened on one of the connection and fastening units.

2. The method of claim 1 , wherein, in step a), the two rotor blade half shells are connected together; wherein the step b) is performed after the two rotor blade half shells have been connected together.

3. A method for making an equipotential bonding connection between two components of a lightning protection arrangement of a wind turbine rotor blade, the method comprising the following steps to be performed in a sequence set forth below: a) providing a wind turbine rotor blade which includes two rotor blade half shells with each half shell having a connection and fastening unit connectable to one of the two components of the lightning protection arrangement, wherein a space is provided in an interior of the wind turbine rotor blade between the two connection and fastening units; b) inserting a connection conductor from outside of the wind turbine rotor blade through a through opening in one of the two connection and fastening units into the interior of the wind turbine rotor blade; c) fastening two ends of the connection conductor to corresponding ones of the connection and fastening units such that the connection conductor bridges the space; wherein the other of the two connection and fastening units also includes a through opening and, in step b), one of the two ends of the connection conductor is guided through said through opening of the other one of the two connection and fastening units outside of the wind turbine rotor blade again; and, wherein, in step b), a guide wire or a guide rope is first guided through the two through openings, by way of which guide wire or guide rope, the connection conductor is guided through the two through openings.

4. The method of claim 1 , wherein, in step a), the two rotor blade half shells are connected together; and, wherein at least one of the two connection and fastening units has been, prior to the two rotor blade half shells being connected together, embedded in a wall of one of the rotor blade half shells and has been connected to one of the two components of the lightning protection arrangement.

5. The method of claim 4 , wherein said at least one connection and fastening unit is disposed between two cover layers of the wall during the embedding process.

6. The method of claim 4 , wherein the one of the two components is a lightning protector conductor, which is integrated into a corresponding one of the rotor blade half shells in which the at least one connection and fastening unit is embedded.

7. The method of claim 1 , wherein the through opening used in step b) is exposed from the outside of the wind turbine rotor blade after the connection and fastening unit, which includes the through opening, has been located from the outside of the wind turbine rotor blade.

8. The method of claim 7 , wherein, prior to step b), a cavity, which is closed in an air-tight manner, of the connection and fastening unit, which includes the through opening, is bored open for exposing the through opening.

9. The method of claim 1 , wherein the other of the two connection and fastening units also includes a through opening and, in step b), one of the two ends of the connection conductor is guided through said through opening of the other one of the two connection and fastening units outside of the wind turbine rotor blade again.

10. A method for making an equipotential bonding connection between two components of a lightning protection arrangement of a wind turbine rotor blade, the method comprising the following steps to be performed in a sequence set forth below: a) providing a wind turbine rotor blade which includes two rotor blade half shells with each half shell having a connection and fastening unit connectable to one of the two components of the lightning protection arrangement, wherein a space is provided in an interior of the wind turbine rotor blade between the two connection and fastening units; b) inserting a connection conductor from outside of the wind turbine rotor blade through a through opening in one of the two connection and fastening units into the interior of the wind turbine rotor blade; c) fastening two ends of the connection conductor to corresponding ones of the connection and fastening units such that the connection conductor bridges the space; wherein the other of the two connection and fastening units also includes a through opening and, in step b), one of the two ends of the connection conductor is guided through said through opening of the other one of the two connection and fastening units outside of the wind turbine rotor blade again; and, wherein, in step b), a guide tube is first guided through the two through openings, in which guide tube the connection conductor is arranged or through which guide tube the connection conductor is pushed forward, the guide tube then being removed again.

11. The method of claim 3 , wherein one of the two components is a lightning receptor which, after step c), is connected to one of the connection and fastening units.

12. The method of claim 1 , wherein, in step c), a length of the connection conductor is selected and the two ends of the connection conductor are fastened so as to cause the connection conductor, which is fastened at both ends, to span the space in a substantially straight line.

13. The method of claim 1 , wherein, in step c), the two ends of the connection conductor are fastened from the outside of the wind turbine rotor blade to corresponding ones of the two connection and fastening units.

14. The method of claim 1 , wherein, in step c), at least one of the two ends of the connection conductor is screw-connected to a perforated disk, a diameter of which is greater than the through opening and which abuts against an outside surface of the corresponding one of the connection and fastening units.

15. The method of claim 14 , wherein one or multiple spacer disks are arranged between the perforated disk and the corresponding one of the connection and fastening units.

16. The method of claim 10 , wherein one of the two components is a lightning receptor which, after step c), is fastened on one of the connection and fastening units.

Assignees

• Nordex Energy Gmbh

Inventors

• Klein Hendrik
• Lipka Thomas

Classifications

• 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

• F03D80/30 Primary

  Lightning protection · CPC title

• F05B2230/60

  Assembly methods · CPC title

• F03D1/0675

  of the blades · CPC title