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Application filed by Vestas Wind Sys AsfiledCriticalVestas Wind Sys As
Priority to DK200801457ApriorityCriticalpatent/DK200801457A/en
Publication of DK200801457ApublicationCriticalpatent/DK200801457A/en
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
B29L2031/00—Other particular articles
B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
B29L2031/082—Blades, e.g. for helicopters
B29L2031/085—Wind turbine blades
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Wind Motors (AREA)
Claims (19)
1. A method of manufacturing a structural element of a wind turbine, comprising: providing a first sheet of a composite material comprising fibres and a resin and having a major surface comprising essentially parallel longitudinal channels; providing a second sheet of a composite material comprising fibres and a resin and having a major surface comprising essentially parallel longitudinal channels; stacking said first sheet and said second sheet one on top of the other such that their respective major surfaces comprising said channels are facing each other forming through passages between said respective major surfaces of the sheets; and consolidating the stack by allowing air trapped between said sheets to escape via said through passages, whereby said structural element is formed.
2. The method of claim 1, wherein each channel of said first sheet has a longitudinal axis; and each channel of said second sheet has a longitudinal axis; whereby said longitudinal axes of said first and second sheets are at an angle to each other.
3. The method of claim 2, wherein the angle is between 1 and 20 degrees, preferably between 1 and 5 degrees.
4. The method of claim 2, wherein the angle is between 30 and 60 degrees, preferably between 40 and 50 degrees, most preferably about 45 degrees.
5. The method of claim 2, wherein the angle is between 70 and 110 degrees, preferably between 85 and 95 degrees, most preferably about 90 degrees.
6. The method of claim 1, wherein, seen in a transverse cross section of the stack, each of the channels of the first sheet is parallel displaced in respect of each of the channels of the second sheet along a plane between said first sheet and seaid second sheet.
7. The method of claim 1, wherein, seen in a transverse cross section of the stack, a channel of said channels of the first sheet directly faces a channel of said channels of the second sheet.
8. The method of any one of claims 1-7, wherein a transverse profile of the major surface of the first sheet is substantially the same as a transverse profile of the major surface of the second sheet.
9. The method of any one of claims 1-7, wherein a transverse profile of the major surface of the first sheet is substantially different from a transverse profile of the major surface of the second sheet.
10. The method of any one of claims 1-9, wherein the stack is consolidated by means of a vacuum applied to the stack.
11. The method of any one of claims 1-10, wherein resin is introduced in-between the sheets via the through passages during the consolidation, whereby the through passages are being filled with resin.
12. The method of any one of claims 1-11, wherein the first and second sheets have been cured prior to the stacking.
13. The method of any one of claims 1-12, wherein the through passages collapses during the consolidation.
14. The method of any one of claims1-13, wherein excess resin is removed from between the sheets via the through passages during the consolidation.
15. The method of any one of claims 1-14, wherein the sheets have been produced by means of a pultrusion method.
16. The method of any one of claims 1-15, further comprising curing the formed structural element.
17. A structural element for a wind turbine, the element being formed by stacked and consolidated first and second sheets, wherein the first sheet is a sheet of a composite material comprising fibres and a resin and has a major surface comprising essentially parallel longitudinal channels and wherein the second sheet is a sheet of a composite material comprising fibres and a resin and has a major surface comprising essentially parallel longitudinal channels, the sheets being stacked such that their respective major surfaces comprising said channels are facing each other forming through passages between said respective major surfaces of the sheets prior to consolidation.
18. A wind turbine rotor blade comprising the structural element of claim 17.
19. A wind turbine comprising the structural element of claim 17.
DK200801457A2008-10-202008-10-20Method of manufacturing a structural element of a wind turbineDK200801457A (en)