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Rotor blade for a wind turbine

Inactive Publication Date: 2012-12-13
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]Provided is a rotor blade having a constructively simple design with enhanced mechanical properties in the region of the blade root.
[0016]A respective connecting element may have a symmetrical or an asymmetrical shape with respect to its circumferentially aligned longitudinal axis. The circumferentially aligned longitudinal axis is defined as the mean line circumferentially extending through the respectively connected connecting elements. It is understood that respective connecting elements are three-dimensional components extending in axial, circumferentially and radial direction, whereby the outer contour of the connecting element is mainly defined by the respective outer contour of the rotor blade. Generally, the connecting elements may be differently shaped as long as they build an at least essentially ring-like shape when connected in order to provide the blade root with additional mechanical stability.

Problems solved by technology

Both approaches for strengthening respective blade roots are deemed as comparatively cumbersome.

Method used

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  • Rotor blade for a wind turbine
  • Rotor blade for a wind turbine
  • Rotor blade for a wind turbine

Examples

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Embodiment Construction

[0025]FIG. 1 shows a principle view of a rotor blade 1 according to an exemplary embodiment of the invention. The rotor blade 1 comprises an elongate base body 2 which axially ends in a respective blade root 3 having a respective circular root face side 4 (cf. FIG. 2). The rotor blade 1 is a hollow component made of a fibre-reinforced resin or cast material. The rotor blade 1 is attachable to a rotor hub of a wind turbine, particularly a direct drive wind turbine (not shown).

[0026]As is shown in FIG. 2, the face side 4 of the blade root 3 has a ring-like shape, whereby respective connecting elements 5 (cf. FIG. 3) are connected in circumferential direction so as to build a circumferentially closed ring-shape.

[0027]The connecting elements 5, which may also be denoted as studs, are shown in FIG. 3. A respective connecting element 5 comprises an axially extending base body 6 having an axially extending connecting portion 7 in the shape of a threaded hole. The axially extending connecti...

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Abstract

A rotor blade for a wind turbine has an elongate blade base body with a plurality of connecting elements. Each connecting element comprises at least one axially extending connecting portion adapted to be connected with corresponding connecting portions of a rotor hub of the wind turbine. The connecting elements are connected in circumferential direction so as to build a closed ring-shape.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority of European Patent Office application No. 11169517.7 EP filed Jun. 10, 2011. All of the applications are incorporated by reference herein in their entirety.FIELD OF INVENTION[0002]A rotor blade for a wind turbine, having an elongate blade base body with a number of connecting elements each comprising at least one axially extending connecting portion adapted to be connected with corresponding connecting portions of a rotor hub of a wind turbine is providedBACKGROUND OF INVENTION[0003]Rotor blades for wind turbine are usually built as fibre-reinforced hollow composite structures. Hence, they are usually fabricated by impregnating respective aligned and orientated fibres or fibre clutches with a casting or resin material respectively. Thereby, removing of the cast rotor blade is oftentimes problematic since particularly in the region of the ring-like shaped root of the blade ovalisation may occur due to the s...

Claims

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Application Information

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IPC IPC(8): F01D5/30F01D5/22F01D5/02
CPCF03D1/001F03D1/065F03D1/0658F03D1/0691Y02E10/728F05B2240/80F05B2240/90Y02E10/721F05B2240/40F03D13/10Y02E10/72F03D1/0675
Inventor GROVE-NIELSEN, ERIK
Owner SIEMENS AG
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