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US 12,723,426 B2Granted
Post-tensioning system for a tower of a wind turbine, post-tensioned tower of a wind turbine and method of post-tensioning a tower of a wind turbine
AssigneeNordex Energy Spain, S.A.U.
InventorsAitor Garduño Estebanez, Teresa Arlabán Gabeiras, Miguel Núñez Polo
Life of this patent
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Abstract
The present invention relates to a post-tensioning system for a tower of a wind turbine that manages the quasi-permanent loads on the tower to counter them, reducing their impact and making it possible to decrease the required amount of overall post-tension force in the tower of the wind turbine, also to a post-tensioned tower of a wind turbine comprising the post-tensioning system and to the method of post-tensioning a tower of a wind turbine.
Claims13
A post-tensioning system for a tower of a wind turbine, wherein the tower comprises at least:
- a vertical axis;
- a concrete tower part comprising:
- an upwind side and a downwind side, wherein the upwind side and the downwind side are defined, in use, from a first vertical plane containing the vertical axis and being perpendicular to a predominant wind direction, upwards and downwards respectively, from the first vertical plane;
- and
- the system comprising:
- an upper end comprising a first surface and a lower end comprising a second surface;
- a plurality of tensioning elements, wherein each one of the tensioning elements comprises a first end located in the upper end and a second end located in the lower end;
- a first set of anchoring elements configured to anchor the first ends of the tensioning elements towards the first surface;
- a second set of anchoring elements configured to anchor the second ends of the tensioning elements towards the second surface;
- wherein the tensioning elements are configured to exert a resultant post-tension force comprising a line of action which intersects with a horizontal plane located at the lower end in a first intersection point upwards from the first vertical plane;
- and
- wherein the first ends of the tensioning elements are disposed in a symmetrical way with respect to the first vertical plane, while the second ends of the tensioning elements are disposed in a non-symmetrical way with respect to the first vertical plane.
9 more elements
A post-tensioning system for a tower of a wind turbine, wherein the tower comprises at least:
- a vertical axis;
- a concrete tower part comprising:
- an upwind side and a downwind side, wherein the upwind side and the downwind side are defined, in use, from a first vertical plane containing the vertical axis and being perpendicular to a predominant wind direction, upwards and downwards respectively, from the first vertical plane;
- and
- the system comprising:
- an upper end comprising a first surface and a lower end comprising a second surface;
- a plurality of tensioning elements, wherein each one of the tensioning elements comprises a first end located in the upper end and a second end located in the lower end;
- a first set of anchoring elements configured to anchor the first ends of the tensioning elements towards the first surface;
- a second set of anchoring elements configured to anchor the second ends of the tensioning elements towards the second surface;
- wherein the tensioning elements are configured to exert a resultant post-tension force comprising a line of action which intersects with a horizontal plane located at the lower end in a first intersection point upwards from the first vertical plane;
- wherein the resultant post-tension force also intersects with an additional horizontal plane located at the upper end in a second intersection point;
- and
- wherein the first intersection point and the second intersection point are located at the same distance or at a different distance from the first vertical plane.
10 more elements
A post-tensioned tower of a wind turbine, the tower comprising at least:
- a vertical axis;
- a concrete tower part comprising:
- an upwind side and a downwind side, wherein the upwind side and the downwind side are defined, in use, from a first vertical plane containing the vertical axis and being perpendicular to a predominant wind direction, upwards and downwards respectively, from the first vertical plane;
- and
- a post-tensioning system for a tower of a wind turbine comprising:
- an upper end comprising a first surface and a lower end-comprising a second surface;
- a plurality of tensioning elements, wherein each one of the tensioning elements comprises a first end located in the upper end and a second end located in the lower end;
- a first set of anchoring elements configured to anchor the first ends of the tensioning elements towards the first surface;
- a second set of anchoring elements configured to anchor the second ends of the tensioning elements towards the second surface;
- wherein the tensioning elements are configured to exert a resultant post-tension force comprising a line of action which intersects with a horizontal plane located at the lower end in a first intersection point upwards from the first vertical plane;
- wherein the plurality of tensioning elements comprises at least one tensioning element disposed in the downwind side of the concrete tower part with fewer strands than at least one tensioning element disposed in the upwind side of the concrete tower part or in that the plurality of tensioning elements comprises more tensioning elements disposed in the upwind side of the concrete tower part than in the downwind side of the concrete tower part.
8 more elements
Dependencies are inferred from the claim text.