Temporary web support for wind turbine blade rotating device
Provided herein is a shear web support for wind turbine blade. Particularly, the present disclosure provides a frangible shear web support element that is designed to fail under certain specific conditions. The frangible support(s) enhance the structural rigidity of the shear web, allow for one-step mold closures, and rupture or disconnect once a predetermined condition (e.g. load threshold, load orientation/vector) is applied to the support element.
1. A wind turbine blade apparatus, comprising:
a blade, comprising:
a first blade half, the first blade half including a first internal wall;
a second blade half, the second blade half including a second internal wall;
a first spar cap;
a second spar cap;
a shear web coupled to the first spar cap;
a support having a first leg coupled to the first internal wall, and a second leg coupled to the shear web,
wherein the support includes a frangible portion configured to fail under a predefined condition.
2. The apparatus of claim 1 , wherein the first spar cap is integrally formed with the first internal wall.
3. The apparatus of claim 1 , wherein the second spar cap is bonded to the second wall.
4. The apparatus of claim 1 , wherein the first blade half engages the second blade half to define a blade interior, wherein the support is removable from the blade interior.
5. The apparatus of claim 1 , wherein the frangible portion is disposed between the first leg and second leg of the support.
6. The apparatus of claim 1 , wherein the frangible portion is disposed at a midpoint of the support.
7. The apparatus of claim 1 , wherein the first leg and frangible portion have a common geometry.
8. The apparatus of claim 1 , wherein the frangible portion is includes a weakened section.
9. The apparatus of claim 1 , wherein the first and second leg have a first material composition, and the frangible portion has a second material composition.
10. The apparatus of claim 1 , wherein the predefined condition is a stress threshold amount.
11. The apparatus of claim 1 , wherein the predefined condition is an application of a structurally degrading material.
12. The apparatus of claim 1 , wherein the predefined condition is a temperature threshold amount.
13. The apparatus of claim 1 , wherein the predefined condition is a load vector.
14. The apparatus of claim 1 , wherein the predefined condition is a load vector oriented orthogonally to a longitudinal axis of the support.
15. The apparatus of claim 1 , wherein the frangible portion fails upon positioning the second blade half on top of the first blade half.
16. The apparatus of claim 1 , wherein the frangible portion remains attached to the support after failure.
17. The apparatus of claim 1 , wherein the shear web is oriented vertically and the support oriented at approximately a 45 degree angle relative to the shear web.
18. The apparatus of claim 1 , wherein the shear web is oriented vertically and the support oriented at an angle less than 45 degrees relative to the shear web.
19. The apparatus of claim 1 , wherein the shear web is oriented vertically and the support oriented at an angle greater than 45 degrees relative to the shear web.