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Rotor blade extension portion having skin located over framework

A technology of rotor blades and extensions, applied in the field of rotor blades, can solve problems such as material bending and deformation, and achieve the effects of reducing mass, improving flexibility, and reducing costs

Inactive Publication Date: 2011-06-29
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, anti-chordwise loads are applied to the material, strongly compressing the trailing edge 10, causing the material to bend and deform

Method used

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  • Rotor blade extension portion having skin located over framework
  • Rotor blade extension portion having skin located over framework
  • Rotor blade extension portion having skin located over framework

Examples

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Embodiment Construction

[0053] image 3 A rotor blade 10 comprising a blade portion 20 and an extension 30 is shown. The proximal or "root" end 40 of the blade portion 20 is configured to be connected to a rotor hub (not shown) of a wind turbine installation, while the distal end 50 of the blade portion 20 extends from the root end 40 and is thereby cantilevered. support. This distal portion 50 represents the “tip” of the blade 10 . The length of the rotor blade 10 may be in the range of 20 to 150 meters in length, but is typically in the range of 20 to 70 meters. The extension 30 is attached to the rearmost region of the root end 40 . In the illustrated embodiment, the protrusion 30 is attached to the extreme proximal position, close to where the rotor blade is connected to the rotor hub in use, however the protrusion 30 could be closer to the extreme towards the blade tip. The end positions are spaced apart.

[0054] Figure 4 A schematic diagram is shown showing a cross-section of the root en...

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PUM

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Abstract

A wind turbine rotor blade extension portion (30) configured to be connectable to rotor blades (10) is disclosed. An extension portion (39) comprises a permanent framework (180), having one or more chord-wise members (190) and a substantially span-wise member (200). A membrane (120, 130) is located over the framework to thereby generate a streamlined surface. The extension portion (30) is configured to transmit aerodynamic loads from the membrane, along the chord-wise members to a rotor blade to which the extension portion is connected, in use.

Description

technical field [0001] The invention relates to the field of rotor blades for wind turbine installations. In particular, the invention relates to means for extending the chordwise dimension of a portion of said rotor blade. Background technique [0002] Wind turbine installations are constantly being developed to enable the installation to capture and then convert an increasing amount of energy represented by the conversion of wind power into electricity. In particular, it is desirable to increase the surface area of ​​the blade receiving the wind force so that this energy can be harvested more efficiently. However, while providing rotor blades with increased surface area, the blade structure is also subject to increased loads. [0003] Blade design involves the optimization of several features of the blade. Such optimization generally involves the choice of the airfoil section used and the variation of the airfoil section along the spanwise length of the blade, the cambe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06
CPCF03D1/0641F05B2230/80F05B2240/301Y02E10/72F03D1/065F05B2260/301F03D1/0675Y02E10/721F05B2230/60Y02P70/50F03D1/06F03D1/0608
Inventor T·弗龙斯基M·汉考克
Owner VESTAS WIND SYST AS
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