Wind turbine rotor blade and lightening discharge receptor with drain passage

A technology of wind turbines and rotor blades, which is applied in the direction of wind engines, wind generator components, and wind engines consistent with the wind direction, and can solve problems such as interfering with the rotation of blades

Inactive Publication Date: 2004-03-03
LM GLASSFIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Finally it should be noted that the accumulation of water in the interior of the blade is undesirable for corrosion and since large quantities of water will act as mobile ballast thus interfering with the rotation of the blade

Method used

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  • Wind turbine rotor blade and lightening discharge receptor with drain passage
  • Wind turbine rotor blade and lightening discharge receptor with drain passage
  • Wind turbine rotor blade and lightening discharge receptor with drain passage

Examples

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no. 1 example

[0019] Figure 1 is a schematic view of the top of the blade, seen from one side of the blade, according to a first embodiment of the invention. A lightning discharge lower lead 14 in the form of a copper cable is screwed onto an anchor block 5 via an end fitting 8 . Three lightning discharge receptors 2, 3, 4, such as tungsten, are connected to an anchor block 5 made of conductive material such as stainless steel, red brass or red copper by screw connections, said lightning discharge receptors The free ends extending from the anchor block 5 to the blade top 1 are respectively the pressure side of the blade top and the suction side of the blade top. In the embodiment shown in Figures 1, 2 and 4, a discharge channel 6 is provided in the lightning discharge receiver 2 extending from that anchor block 5 to the free end of the blade top. Arrow 13 in Fig. 1 indicates how water is discharged from the inside of the blade to the outside of the blade through the discharge channel 6 in ...

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PUM

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Abstract

The invention relates to a wind turbine rotor blade which in its tip (1) is provided with a lightning receptor (2) and a drain passage (6; 16; 26; 36; 46; 56) connecting the blade interior (11, 12) with the blade exterior, the drain passage (6; 16; 26; 36; 46; 56) and the lightning receptor (2) having a common interface. The invention further relates to a lightning receptor provided with a drain passage (6; 36; 46; 56).

Description

technical field [0001] The present invention relates to a wind turbine rotor blade having a lightning discharge receptor at the top of the blade and a discharge channel connecting the outside of the blade with the inside of the blade. Furthermore, the invention relates to a lightning discharge receiver. Background technique [0002] It is known that wind turbine rotor blades are provided with lightning discharge protection systems in order to protect the wind turbine rotor blades from lightning strikes. For example WO96 / 07825 discloses a lightning discharge protection device in which a so-called lightning discharge receptor made of electrically conductive material is provided on the top of the blade. The lightning discharge receiver can catch the lightning strike and conduct the current through a lightning downconductor extending in the longitudinal direction of the blade and grounded via the hub of the wind turbine. [0003] It is also known to drill a drain hole in the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D80/30H05F3/04
CPCF03D11/0033Y02E10/722Y02E10/721F03D80/30Y02E10/72
Inventor F·莫勒拉森
Owner LM GLASSFIBER
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