Method for manufacturing segments for a tower, prestressed segment, tower ring, tower, wind turbine, and prestressing device

Patent metadata

Field	Value
Publication number	US-11566605-B2
Application number	US-202017112710-A
Country	US
Kind code	B2
Filing date	Dec 4, 2020
Priority date	Dec 10, 2019
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

Provided is a method for manufacturing segments for a tower, in particular of a wind turbine, and a prestressed segment for a tower. Provided is tower ring for a tower, a tower of the wind turbine, and a wind turbine. In addition, a prestressing device is provided. The method for manufacturing segments for a tower, in particular of a wind turbine, comprises: arranging at least one prestressing element in a mold, wherein the prestressing element comprises or consists of fiber-reinforced plastic; tensioning the prestressing element; embedding the prestressing element in a concrete mass; hardening of the concrete mass into a longitudinal segment, preferably in the form of a complete longitudinal segment of a tower; removing the hardened longitudinal segment from the mold.

First claim

The invention claimed is:

1. A method for manufacturing segments for a tower of a wind turbine, the method comprising:
arranging a prestressing element in a mold, wherein the prestressing element comprises fiber-reinforced plastic;
tensioning the prestressing element;
embedding the prestressing element in a concrete mass;
hardening the concrete mass into a longitudinal segment to form a longitudinal segment of a tower;
removing the longitudinal segment from the mold; and
cutting the longitudinal segment into a plurality of segments,
wherein connecting devices are located at one or more edges of the plurality of longitudinal segments between the prestressing element and the hardened concrete mass, wherein the connecting devices comprise steel, and wherein the prestressing element is passed through the connecting devices or guided past the connecting device.

2. The method as claimed in claim 1 , comprising:
releasing a connection between the prestressing element and a prestressing device.

3. The method as claimed in claim 1 , wherein the cutting comprises cutting the longitudinal segment by sawing or water jet.

4. The method as claimed in claim 1 , comprising:
arranging a reinforcement in the mold, wherein the reinforcement comprises one or more of: fibers, polymer-coated fibers, fiber-reinforced plastic, or steel.

5. The method as claimed in claim 1 , comprising:
producing the prestressing element in a vacuum infusion process, a manual laminating process, or a pultrusion process.

6. The method as claimed in claim 1 , comprising:
roughening a surface of the prestressing element.

7. The method as claimed in claim 1 , wherein:
the fiber-reinforced plastic of the prestressing element has a fiber part, wherein the fiber part comprises glass fibers, AR glass fibers, E glass fibers, carbon fibers, polyethylene fibers, basalt fibers, or a combination of these fibers,
the fiber-reinforced plastic of the prestressing element has a fiber part, wherein the fibers of the fiber part have a sizing, and
the fiber-reinforced plastic of the prestressing element has a matrix part with a duroplastic, wherein the duroplastic comprises epoxy resin or unsaturated polyester.

8. A segment for a tower of a wind turbine, comprising:
a concrete mass; and
at least one tensioned prestressing element embedded in the concrete mass,
wherein the at least one tensioned prestressing element comprises or consists of fiber-reinforced plastic,
a connecting device at an edge of the segment between the at least one tensioned prestressing element and the concrete mass, wherein the at least one tensioned connecting device comprises steel, and wherein the at least one tensioned prestressing element is passed through the connecting device or guided past the connecting device.

9. The segment as claimed in claim 8 , wherein the fiber-reinforced plastic of the prestressing element has:
a fiber part with glass fibers, carbon fibers, polyethylene fibers, basalt fibers, or a combination of these fibers; and
a matrix part with a duroplastic, wherein the duroplastic is epoxy resin or unsaturated polyester.

10. The segment as claimed in claim 8 , wherein the concrete mass comprises or consists of fine concrete.

11. The segment as claimed in claim 8 , wherein the prestressing element has:
a longitudinal direction;
a transverse direction oriented orthogonally to the longitudinal direction; and
a thickness direction oriented orthogonally to the longitudinal direction and orthogonally to the transverse direction,
wherein a length of the prestressing element in the longitudinal direction is greater than a width in the transverse direction, and the width of the prestressing element in the transverse direction is greater than in the thickness direction.

12. A tower ring for a tower of a wind turbine, comprising:
a plurality of segments as claimed in claim 8 , wherein the plurality of segments are each connected to adjacent segments of the plurality of segments by the connecting devices, the tower ring comprising a first side wall with at least a first opening configured to receive a fixing element, and a second side wall opposite the first side wall with at least one second opening configured to receive a fixing element, an upper transverse wall and a lower transverse wall opposite the upper transverse wall,
wherein the upper and lower transverse walls are arranged substantially orthogonally to the first and second side walls and connect the upper and lower transverse walls.

13. A tower of a wind turbine, comprising:
a plurality of tower rings as claimed in claim 12 ,
wherein adjacent segments of the plurality of segments are releasably connected together.

14. A wind turbine, comprising:
the tower as claimed in claim 13 .

Assignees

• Wobben Properties Gmbh

Inventors

• Stracke Olaf

Classifications

• E04H12/12

  of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements · CPC title

• E04C5/073

  Discrete reinforcing elements, e.g. fibres · CPC title

• F03D13/20 Primary

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

• B28B23/02

  wherein the elements are reinforcing members {(B28B23/0006 takes precedence)} · CPC title

• F05B2230/21

  by casting · CPC title