1. A method for fabricating elongated airfoils for wind turbines comprising:
providing a first spar reinforcing fiber structure, a second spar reinforcing structure and a shear web reinforcing fiber structure;
positioning the first spar reinforcing fiber structure and the second spar reinforcing fiber structure adjacent the shear web reinforcing fiber structure;
infusing the first shell reinforcing fiber structure and shear reinforcing fiber structure with a matrix material and curing the matrix material to form a unitary composite web spar; and
attaching the web spar to each of a first composite first shell component and a composite second shell component to form an elongated composite airfoil structure.
2. The method of claim 1, wherein the infusing step comprises a technique selected from the group consisting of resin transfer molding, vacuum assisted resin transfer molding, resin film infusion, resin infusion or combinations thereof
3. The method of claim 1, wherein the positioning includes providing a mold conforming to the desired geometry of a shear web portion of the unitary composite first shell component.
4. The method of claim 1, wherein at least one of the first shell reinforcing fiber structure, the second shell reinforcing fiber structure or the shear web reinforcing fiber structure includes a stiffener material.
5. The method of claim 4, wherein the stiffener material is balsa or foam.
6. A wind turbine blade comprising
a first shell portion; and
a second shell portion adhered to the first shell portion;
wherein the first shell portion comprises at least one shear web, the first shell portion and integral shear web being a unitary composite component.
7. The wind turbine blade of claim 6, wherein the unitary composite component includes a plurality of shear webs.
8. The wind turbine blade of claim 6, wherein the wind turbine blade comprises a length of greater than about 20 meters.
9. The wind turbine blade of claim 6, wherein the wind turbine blade comprises a length of greater than about 50 meters.
10. The wind turbine blade of claim 6, wherein the second shell portion includes the second shell portion and integral shear web being a unitary composite component.
11. A wind turbine blade comprising
a first shell portion and a second shell portion enveloping a web spar, the web spar comprising:
a first spar portion;
a second spar portion; and
at least one shear web between the first spar portion and the second spar portion;
wherein the first spar portion and the shear web are a unitary composite component.
12. The wind turbine blade of claim 11, wherein the unitary composite component includes a plurality of shear webs
13. The wind turbine blade of claim 11, wherein the wind turbine blade comprises a length of greater than about 20 meters.
14. The wind turbine blade of claim 11, wherein the wind turbine blade comprises a length of greater than about 50 meters.
15. The wind turbine blade of claim 11, wherein the first spar portion, shear web and second spar portion are a unitary composite component.
16. The wind turbine blade of claim 11, wherein the web spar includes a \u201cT\u201d shaped geometry.
17. The wind turbine blade of claim 11, wherein the web spar includes a \u201cI\u201d shaped geometry.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A clip ornament for a barrel, comprising:
an ornament main body to be inserted into an attachment hole of a clip piece; and
grip portions provided at upper and lower portions of the ornament main body so as to grip the clip piece.
2. The clip ornament for a barrel, according to claim 1, wherein the ornament main body is provided with a press-protrusion at a lower surface thereof.
3. The clip ornament for a barrel, according to claim 1, wherein the upper portion of the ornament main body is projectingly provided with grip portions at only longitudinally opposite circumferential ends thereof, and the lower portion is projectingly provided with grip portions at longitudinally and traverse opposite circumferential ends thereof.
4. The clip ornament for a barrel, according to claim 3, wherein the lower portion of the ornament main body is projectingly provided with continuous grip portions at longitudinal opposite circumferential ends thereof and with grip portions at circumferential ends thereof other than the longitudinal opposite circumferential ends in such a manner that the grip portions are separate from the continuous grip portions.
5. The clip ornament for a barrel, according to claim 1, wherein an upper grip portion of the grip portions included in the ornament main body is protruded more than a lower grip portion opposite to the upper grip portion, the upper grip portion being assembled first, and a lower grip portion assembled later is protruded more than an upper grip portion opposite to the lower grip portion.
6. The clip ornament for a barrel, according to claim 1, wherein an engaging rib is integrally formed between the upper and lower grip portions, on one side, of the ornament main body.
7. A clip with an ornament, comprising a clip piece provided at one end thereof with an attachment portion to be attached to a barrel and at the other end with an attachment hole adapted to attach thereto the clip ornament recited in claim 1.
8. The clip with an ornament, according to claim 7, wherein the clip piece is made of metal and the clip ornament is made of plastic or is die-cast.
9. A method of attaching a clip ornament for a barrel, comprising:
a first step of inserting one of upper grip portions of the clip ornament into an attachment hole of the clip piece from an under side of the clip piece and bringing an attachment jig into contact with a lower surface of the clip piece;
a second step of moving the clip ornament and the attachment jig in a direction of approaching each other while inserting the upper grip portion into the attachment hole, thereby inserting a lip of the attachment hole between the upper grip portion and a lower grip portion opposite thereto;
a third step of continuing the movement of the clip ornament and the attachment jig, moving the other upper grip portion of the clip ornament to a position capable of being inserted into the attachment hole, and inserting the other upper grip portion into the attachment hole;
a fourth step of causing the lip to coincide with between the other upper grip portion and a lower grip portion opposite to the other upper grip portion, and moving the clip ornament and the attachment jig in a direction of getting away from each other; and
a fifth step of moving the clip ornament and thereby causing the longitudinally opposite upper and lower grip portions to grip and fix the lip of the attachment hole of the clip piece.