Segmented rotor blade extension portion
First Claim
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1. A wind turbine rotor blade, comprising:
- a structurally coherent blade portion, the blade portion comprising;
a leading portion configured to receive fluid incident on the rotor blade; and
a trailing portion located downstream of the leading portion and configured to smoothly convey fluid passing thereover from the leading portion,wherein a root region of the blade portion is configured to be connectable to a hub of a wind turbine and the blade portion is configured to smoothly transfer loads experienced thereby to the root region of the blade portion for transfer to the hub; and
an extension portion appended to an outer surface of the trailing portion, the extension portion comprising a plurality of segments located adjacent one another in a span-wise sense, an interface between adjacent segments being configured to inhibit transmission of loads between the segments, wherein each segment comprises a first surface and a second surface, the first surface being spaced from the second surface at a proximal region of the extension portion and the first surface being connected to the second surface at a distal region of the extension portion.
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Abstract
A wind turbine rotor blade extension portion having a plurality of segments, located adjacent one another in a span-wise sense. An interface between adjacent segments is configured to minimize disruption to fluid passing thereover and to inhibit transmission of longitudinal loads between segments. Each segment has a first surface and a second surface. The first surface is spaced from the second surface at a proximal region of the extension portion and the first surface is connected to the second surface at a distal region of the extension portion to thereby generate a fair surface for a rotor blade to which the extension portion is connected, in use.
76 Citations
23 Claims
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1. A wind turbine rotor blade, comprising:
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a structurally coherent blade portion, the blade portion comprising; a leading portion configured to receive fluid incident on the rotor blade; and a trailing portion located downstream of the leading portion and configured to smoothly convey fluid passing thereover from the leading portion, wherein a root region of the blade portion is configured to be connectable to a hub of a wind turbine and the blade portion is configured to smoothly transfer loads experienced thereby to the root region of the blade portion for transfer to the hub; and an extension portion appended to an outer surface of the trailing portion, the extension portion comprising a plurality of segments located adjacent one another in a span-wise sense, an interface between adjacent segments being configured to inhibit transmission of loads between the segments, wherein each segment comprises a first surface and a second surface, the first surface being spaced from the second surface at a proximal region of the extension portion and the first surface being connected to the second surface at a distal region of the extension portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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19. A wind turbine rotor blade, comprising:
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a structurally coherent blade portion, the blade portion comprising; a root portion configured to be connectable to a hub of a wind turbine; a tip portion located remotely from the root portion; and a longitudinal structural member extending between the root portion and the tip portion, wherein the blade portion is configured to provide a continuous load bearing path along a rearmost surface thereof, from tip to root, along which longitudinal loads are transmitted, in use; and an extension portion appended to the outer, rearmost surface of the root portion, wherein the extension portion is configured to provide a streamlined extension surface to the blade portion whilst inhibiting span-wise transmission of loads therewithin and from the blade portion. - View Dependent Claims (21)
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22. A wind turbine rotor blade, comprising:
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a structurally coherent blade portion, the blade portion comprising; a leading portion configured to receive fluid incident on the rotor blade; and a trailing portion located downstream of the leading portion and configured to smoothly convey fluid passing thereover from the leading portion, wherein a root region of the blade portion is configured to be connectable to a hub of a wind turbine and the blade portion is configured to smoothly transfer loads experienced thereby to the root region of the blade portion for transfer to the hub; and an extension portion comprising a plurality of segments located adjacent one another in a span-wise sense, an interface between adjacent segments being configured to inhibit transmission of loads between the segments, wherein each segment comprises a first surface and a second surface, the first surface being spaced from the second surface at a proximal region of the extension portion and the first surface being connected to the second surface at a distal region of the extension portion, and wherein the first and second surfaces engage an outer surface of the trailing portion at the proximal region of the extension portion.
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23. A wind turbine rotor blade, comprising:
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a structurally coherent blade portion, the blade portion comprising; a leading portion configured to receive fluid incident on the rotor blade; and a trailing portion located downstream of the leading portion and configured to smoothly convey fluid passing thereover from the leading portion, wherein a root region of the blade portion is configured to be connectable to a hub of a wind turbine and the blade portion is configured to smoothly transfer loads experienced thereby to the root region of the blade portion for transfer to the hub; and an extension portion comprising a plurality of segments located adjacent one another in a span-wise sense, an interface between adjacent segments being configured to inhibit transmission of loads between the segments, wherein each segment comprises a first surface and a second surface, the first surface being spaced from the second surface at a proximal region of the extension portion and the first surface being connected to the second surface at a distal region of the extension portion, and wherein an outer surface of the trailing portion underlies the extension portion for a full span-wise length of the extension portion.
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Specification