WIND TURBINE & WIND TURBINE BLADE
First Claim
Patent Images
1. An elongate wind turbine blade including:
- a blade root end for mounting on a rotatable hub of a wind turbine;
an opposite, blade tip end;
a first blade portion extending from a first position at or adjacent the blade root end to a second position between the blade ends, the blade having a substantially constant first chord length along the first blade portion;
a second blade portion extending from a third position at or adjacent the blade tip end to a fourth position between the second and third positions, the blade having a substantially constant second chord length along the second blade portion, the second chord length being less than the first chord length;
a third blade portion extending from the first blade portion to the second blade portion, the chord length decreasing along the third blade portion in a direction towards the blade tip end;
wherein the blade root end is configured to be mounted on a said hub at an attachment angle to a plane of rotation of the blade, andwherein the blade tip end is configured such that, when the blade root end is so mounted on a said hub, the blade tip end is at a twist angle to said plane of rotation, the twist angle being less than the attachment angle.
1 Assignment
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Accused Products
Abstract
A wind turbine blade to be mounted to a wind turbine hub configured to be mounted for rotation in a hub plane of rotation so as to generate electricity is provided. The blade extends lengthwise between a hub mounting root end and a blade tip end. The blade extends a blade width between a leading edge and trailing edge such that when mounted to the hub the blade is twisted at the root end by an angle of between 19° to 21° relative to the plane of rotation of the hub and wherein the blade is twisted at a tip end to rotate in a plane parallel to the plane of rotation of the hub to within ±1°.
18 Citations
21 Claims
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1. An elongate wind turbine blade including:
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a blade root end for mounting on a rotatable hub of a wind turbine; an opposite, blade tip end; a first blade portion extending from a first position at or adjacent the blade root end to a second position between the blade ends, the blade having a substantially constant first chord length along the first blade portion; a second blade portion extending from a third position at or adjacent the blade tip end to a fourth position between the second and third positions, the blade having a substantially constant second chord length along the second blade portion, the second chord length being less than the first chord length; a third blade portion extending from the first blade portion to the second blade portion, the chord length decreasing along the third blade portion in a direction towards the blade tip end; wherein the blade root end is configured to be mounted on a said hub at an attachment angle to a plane of rotation of the blade, and wherein the blade tip end is configured such that, when the blade root end is so mounted on a said hub, the blade tip end is at a twist angle to said plane of rotation, the twist angle being less than the attachment angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification