Wind turbine rotor blade and method of construction
A wind turbine rotor blade is bonded together at the leading and trailing edges, and including a shear web or webs (the main vertical stiffening member that runs the span of the rotor blade) as an integral part, sharing the inner and outer skins of one or both sides of the blade. The integrated shear web(s) is made into the skin shell, and is an uninterrupted, continuous extension of the shell laminate that is joined to the shell component/components without requiring a secondary bond of any sort. The laminates in the shell and the shear web(s) may differ or be the same.
1. A wind turbine blade comprising:
a first pressure member, the first pressure member having a leading edge and a trailing edge;
a second pressure member, the second pressure member having a leading edge and a trailing edge:
wherein the first and second pressure members are joined at their respective leading and trailing edges, and
at least one of the first pressure member or second pressure member having an opening defined therein at a location between the leading and trailing edge;
a shear web member, the shear web member disposed between the first pressure member and the second pressure member:
wherein the shear web member includes a first side, a second side and a third side, with the second side disposed between, and connected to, the first and third side,
the first and third sides tapered inwardly towards said second side to form an apex,
at least one spar cap disposed at an end of the shear web member; and
a first covering plate, the first covering plate disposed within the opening of the first pressure member, the first covering plate having a first inwardly extending bonding flange and a second inwardly extending bonding flange, the first inwardly extending bonding flange extending parallel to the first side of the shear web member and the second inwardly extending bonding flange extending parallel to the second side of the shear web member.
2. The wind turbine blade of claim 1 , wherein the shear web member extends along a span of the first and second pressure members.
3. The wind turbine blade of claim 1 , wherein the shear web member includes opposite respective first and second ends, with the second end of the shear web member having a bonding flange for securing the shear web member to the second pressure member.
4. The wind turbine blade of claim 1 , further comprising a second shear web member, the shear web member having a first length and the second shear web member having a second length, wherein the second length is shorter than the first length.
5. The wind turbine blade of claim 1 , wherein the first covering plate has a first surface disposed between the first bonding flange and the second bonding flange, the first surface having a complimentary contour to the first pressure member.
6. The wind turbine blade of claim 5 , wherein at least one of the first and second covering plate bonding flanges extends at an angle with respect to the first surface of the covering plate.
7. The wind turbine blade of claim 1 , wherein a first spar cap is integrally formed with the first pressure member.
8. The wind turbine blade of claim 1 , wherein a second spar cap is integrally formed with the second pressure member.
9. The wind turbine blade of claim 8 , wherein the opening is defined in the second pressure member at a location between the first spar cap and the second spar cap, with the opening extending to an inner surface of the first pressure member.
10. The wind turbine blade of claim 1 , wherein the shear web member includes a first and second spar cap, with the first covering plate disposed between the first and second spar cap.
11. The wind turbine blade of claim 10 , wherein the first covering plate is a separate component from the first and second spar caps.
12. The wind turbine blade of claim 1 , wherein the first pressure member is a high pressure member and the second pressure member is a low pressure member.
13. The wind turbine blade of claim 1 , wherein at least one of the first and second pressure members include a core material disposed therein.