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Wind turbine blade and method of manufacturing thereof

A technology for wind turbines and blades, which is applied in the field of wind turbine blades and its manufacturing, can solve the problems of harmful stress concentration at the end of the bushing, weaken the structure, etc., and achieve the effect of firm compression and reduced possibility

Inactive Publication Date: 2006-07-12
NORDEX BLADE TECH CENT APS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this prior art, a relatively large amount of root material is removed which weakens the structure so that the root must be oversized
Especially for large blades made of relatively soft modern composites like fiber reinforced plastics, stress concentrations at the end of the bushing can be detrimental since the bushing is much stiffer

Method used

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  • Wind turbine blade and method of manufacturing thereof
  • Wind turbine blade and method of manufacturing thereof
  • Wind turbine blade and method of manufacturing thereof

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Embodiment Construction

[0031] exist figure 1 A wind turbine blade 1 can be seen in plan view of FIG. The blade 1 comprises an aerodynamically designed part 1 having a shape optimized for wind energy exploitation and a blade root 3 for connection to a hub (not shown) of a wind turbine. The blade root 3 is a highly strained area of ​​the wind turbine blade since the wind turbine blade is subject to high forces caused by the wind, rotating masses, etc. As an example, a typical wind turbine blade 1 for a 1.5MW wind turbine has a size of about 35m and a mass of about 6000kg per blade. Most modern wind turbine blades comprise a central hollow high strength spar and an aerodynamic covering of limited strength, and usually both the spar and covering are made of composite materials such as fiber reinforced plastics. Other blade designs include I-beams, or no beams since the shroud is reinforced to be self-supporting.

[0032] figure 2 The leaf root 3 can be seen more closely in , where figure 2 is an ...

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Abstract

Method of manufacturing a blade root of a wind turbine blade and wind turbine blade having an aerodynamically designed blade portion and a blade root adapted for releasable attachment to a hub of a wind turbine, said blade root being of laminated construction and comprising a plurality of fully bonded bushings (4) extending largely in the longitudinal direction of the blade, which bushings (4) are provided with an internal thread (5) for mounting bolts for releasable attachment to the hub, wherein the bushings (4) comprise a first portion (6) and an extension portion (7) having gradually increased flexibility in the direction away from the first portion (6) to provide a light blade of high strength.

Description

technical field [0001] The present invention relates to a wind turbine blade having an aerodynamically designed blade portion and a blade root adapted to be detachably mounted on the hub of the wind turbine, said blade root being layered and comprising essentially A plurality of fully integrated bushings extending in the longitudinal direction of the blade are provided with internal threads for mounting bolts for detachable mounting to the hub. Background technique [0002] Wind turbines have been used for decades to exploit wind energy, for example to generate electricity. In order to reduce the price of electricity produced by such wind turbines, the size of the wind turbines has been increased to the current average nominal power of commercial wind turbines, which is about 1.5MW, while wind turbines up to 3MW are being developed, and it is hoped that in the future Within a few years larger wind turbines could enter the market. A typical commercial wind turbine has three...

Claims

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Application Information

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IPC IPC(8): B64C11/06F03D1/06B29C70/86
CPCF03D1/0658B29L2031/085B29C70/86B64C11/06F05C2253/04F05B2230/41F05B2280/6003F05B2240/30Y02E10/721F05B2260/301Y10T29/49339Y10T29/49321Y10T29/49337Y02E10/72Y02P70/50
Inventor 朗·希特-尼尔森弗莱明·索伦森
Owner NORDEX BLADE TECH CENT APS
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