초록 ▼

A wind turbine rotor blade is assembled from a first and a second rotor blade half shell made of a fiber-reinforced plastics material. An electrical heating arrangement includes a first heating element connected to the first rotor blade half shell and having a blade root end and a blade tip end and

A wind turbine rotor blade is assembled from a first and a second rotor blade half shell made of a fiber-reinforced plastics material. An electrical heating arrangement includes a first heating element connected to the first rotor blade half shell and having a blade root end and a blade tip end and a second heating element connected to the second rotor blade half shell also having a blade root end and a blade tip end. The heating arrangement also includes a third heating element connected to the rotor blade half shells and having a blade root end and a blade tip end. The blade tip ends of the first, second and third heating elements are mutually electrically connected. The blade root ends of the first, second and third heating elements are connected to respective electrical connecting lines.

대표청구항 ▼

1. A wind turbine rotor blade comprising: a first rotor blade half shell made of fiber-reinforced plastics material;a second rotor blade half shell made of fiber-reinforced plastics material;said first and said second rotor blade half shells conjointly defining a blade root;a fiber-reinforced plasti

1. A wind turbine rotor blade comprising: a first rotor blade half shell made of fiber-reinforced plastics material;a second rotor blade half shell made of fiber-reinforced plastics material;said first and said second rotor blade half shells conjointly defining a blade root;a fiber-reinforced plastics material;a heating arrangement having a first heating element, a second heating element and a third heating element, a blade root end and electrical connections at said blade root end;an electrically insulating layer arranged between said third heating element and at least one of said first heating element and said second heating element;each one of said first, second and third electrical heating elements having a blade root end and a blade tip end;said first electrical heating element being embedded in a plastics matrix simultaneously with reinforcement fibers of said first rotor blade half shell by curing a liquid plastics material during the production of said first rotor blade half shell;said second electrical heating element being embedded in a plastics matrix simultaneously with reinforcement fibers of said second rotor blade half shell by curing a liquid plastics material during the production of said second rotor blade half shell;said third heating element being connected to said first and said second rotor blade half shells;a first section of said third heating element and a section of said first heating element being arranged in a partially overlapping manner and a second section of said third heating element and a section of said second heating element being arranging in a partially overlapping manner;said blade tip ends of said first, said second and said third electrical heating elements being interconnected in an electrically conductive manner;said heating arrangement further including first, second and third electrical connecting lines corresponding to respective ones of said first, second and third heating elements; and,the blade root ends of said first, said second and said third electrical heating element being connected to corresponding ones of said first, second and third electrical connecting lines. 2. The wind turbine rotor blade of claim 1, wherein: said third heating element has a first section connected to said first rotor blade half shell; and,said first heating element and said first section of said third heating element mutually overlap. 3. The wind turbine rotor blade of claim 2, wherein: said third heating element has a second section connected to said second rotor blade half shell; and,said second heating element and said second section of said third heating element mutually overlap. 4. The wind turbine rotor blade of claim 1, wherein: said third heating element has a second section connected to said second rotor blade half shell; and,said second heating element and said second section of said third heating element mutually overlap. 5. The wind turbine rotor blade of claim 1, wherein said blade tip ends of said first, said second and said third heating element are in direct contact with each other. 6. The wind turbine rotor blade of claim 1 further comprising a connecting piece configured to electrically interconnect said blade tip ends of said first, said second and said third heating elements. 7. The wind turbine rotor blade of claim 6, further comprising means for improving electrical contact between said blade tip end of said third heating element and one of said blade tip ends of said first and said second heating elements. 8. The wind turbine rotor blade of claim 6, further comprising means for improving electrical contact between said connecting piece and at least one of said blade tip ends of said first, said second and said third heating element. 9. The wind turbine rotor blade of claim 6, wherein said connecting piece is arranged outside said first heating element and said second heating element and inside said third heating element as seen in cross section through said wind turbine rotor blade. 10. The wind turbine rotor blade of claim 6, wherein said connecting piece includes a carbon fiber material. 11. The wind turbine rotor blade of claim 1, wherein said electrical insulating layer defines a cutout at said blade tip end of at least one of said first heating element, said second heating element, and said third heating element. 12. A method for making a wind turbine rotor blade having fiber-reinforced plastics material and an electrical heating arrangement having electrical connections at a blade root end, said method comprising the steps of: producing a first rotor blade half shell from a fiber-reinforced plastics material, the first rotor blade half shell including a first heating element having a blade root end and a blade tip end, wherein said producing step includes simultaneously embedding the first heating element and the reinforcement fibers of the fiber-reinforced plastics material in a plastics matrix by curing a liquid plastics material;producing a second rotor blade half shell from a fiber-reinforced plastics material, the second rotor blade half shell including a second heating element having a blade root end and a blade tip end, wherein the producing step includes embedding the second heating element and the reinforcement fibers of the fiber-reinforced plastics material in a plastics matrix by curing a liquid plastics material;mutually joining the first rotor blade half shell and the second rotor blade half shell;thereafter connecting a third heating element, which has a blade root end and a blade tip end, to the first rotor blade half shell and to the second rotor blade half shell;making an electrical connection between the blade tip ends of the first, second and third heating elements;arranging an electrically insulating layer so as to at least partially cover at least one of the first and the second heating element before said connecting of said third heating element to said first and second rotor blade half shells;arranging a first section of said third heating element and a section of said first heating element in a partially overlapping manner and a second section of said third heating element and a section of said second heating element in a partially overlapping manner; and,providing electrical connecting lines and connecting the blade root ends of the first, second and third heating elements to corresponding ones of said electrical connecting lines. 13. The method of claim 12, further comprising the step of attaching a connecting piece to electrically interconnect the blade tip ends of the first, second and third heating elements after said production of the first and second rotor blade half shells. 14. The method of claim 12, wherein said arranging of said electrically insulating layer is done during said production of said first rotor blade half shell and said production of said second rotor blade half shell. 15. The method of claim 14, wherein said electrically insulating layer has a layer of reinforcement fibers which are embedded in a plastic matrix simultaneously with the reinforcement fibers of the first rotor blade half shell or of the second rotor blade half shell. 16. The wind turbine rotor blade of claim 1, wherein: one of said first, second and third electrical connecting lines is electrically connected to a first pole of an electrical power source, andtwo other of said first, second and third electrical connecting lines are electrically connected to a second pole of the electrical power source. 17. The method of claim 12, further comprising: electrically connecting one of said first, second and third electrical connecting lines to a first pole of an electrical power source; and,electrically connecting two other of said first, second and third electrical connecting lines to a second pole of the electrical power source.