Method for erecting a wind turbine tower

Patent metadata

Field	Value
Publication number	US-11230854-B2
Application number	US-201917043507-A
Country	US
Kind code	B2
Filing date	Apr 8, 2019
Priority date	Apr 16, 2018
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

The object is attained by a method of erecting a wind turbine tower having a plurality of tower segments which are tensioned by means of tensioning members. A plurality of tensioning members is provided and a fixing unit is fixed at an end of the tensioning members. Fixing of the fixing unit is effected by placing a multi-part wedge unit at a free end of the tensioning members which comprise a plurality of tensioning wires. A sleeve is fitted over the wedge unit and a pulling tab is fixed on or at the sleeve. The pulling tab has an opening. A cable is fixed at or in the hole in the pulling tab. The cable with the fixing unit and thus the tensioning members is pulled upwardly. The fixing unit is fixed at a segment of the tower, that is to be fixed. The sleeve is removed before the tensioning member is braced.

First claim

The invention claimed is:

1. A method comprising:
erecting a wind turbine tower having a plurality of tower segments tensioned by a plurality of tensioning members, the method comprising:
fixing a fixing unit at first ends of the plurality of tensioning members, wherein fixing the fixing unit includes:
placing a multi-part wedge unit at the first ends of the plurality of tensioning members, wherein the tensioning members comprise a plurality of tensioning wires;
fitting a sleeve over the multi-part wedge unit;
fixing a pulling tab on or at the sleeve, wherein the pulling tab has an opening;
fixing a cable at the opening in the pulling tab;
pulling the cable with the fixing unit and the plurality of tensioning members upwardly;
fixing the fixing unit to a segment of the wind turbine tower for tensioning the plurality of tensioning members; and
removing the sleeve over the multi-part wedge unit,
wherein the sleeve is removed before the plurality of tensioning members are placed in tension.

2. The method as claimed in claim 1 further comprising removing the pulling tab from the sleeve before the fixing unit is fixed to the segment.

3. The method as claimed in claim 2 wherein removing the pulling tab comprises using the cable to remove the pulling tab.

4. The method as claimed in claim 1 wherein second ends of the plurality of tensioning wires are coupled in a region of a foundation.

5. The method as claimed in claim 1 wherein pulling the cable with the fixing unit and the plurality of tensioning members upwardly comprises using a roller system to pull the cable with the fixing unit and the plurality of tensioning members upwardly.

Assignees

• Wobben Properties Gmbh

Inventors

• Freese Ewald
• Stracke Olaf

Classifications

• F05B2230/60

  Assembly methods · CPC title

• F03D13/20

  Arrangements for mounting or supporting wind motors; Masts or towers for wind motors · CPC title

• E04H12/16 Primary

  Prestressed structures · CPC title

• E04H12/342

  Arrangements for stacking tower sections on top of each other (E04H12/344 takes precedence) · CPC title

• F03D13/10 Primary

  Assembly of wind motors; Arrangements for erecting wind motors · CPC title