초록 ▼

The present invention relates to a reinforced blade for a wind turbine, particularly to a blade having at least one elongated reinforcing member connected inside the shell for increasing the strength of the blade, each of the at least one elongated reinforcing member having a first end and a second

The present invention relates to a reinforced blade for a wind turbine, particularly to a blade having at least one elongated reinforcing member connected inside the shell for increasing the strength of the blade, each of the at least one elongated reinforcing member having a first end and a second end and extending in a longitudinal direction between the first end and the second end and wherein the first end is connected to the upper part of the shell and the second end is connected to the lower part of the shell thereby decreasing peeling and shear stresses in the trailing edge of the blade.

대표청구항 ▼

1. A wind turbine blade, comprising: a shell having a section with an aerodynamic profile, wherein the;at least one girder; andat least one elongated reinforcing member connected to the shell for increasing the strength of the blade, each of the at least one elongated reinforcing member being positi

1. A wind turbine blade, comprising: a shell having a section with an aerodynamic profile, wherein the;at least one girder; andat least one elongated reinforcing member connected to the shell for increasing the strength of the blade, each of the at least one elongated reinforcing member being positioned between and spaced apart from a girder of the at least one girder closest to a trailing edge of the shell and the trailing edge of the shell, each of the at least one elongated reinforcing member having a first end and a second end and extending between the first end and the second end, wherein the first end is connected to an upper part of the shell itself and the second end is connected to a lower part of the shell itself thereby preventing deformation of the trailing edge of the shell. 2. A wind turbine blade according to claim 1, wherein the at least one elongated reinforcing member comprises a plurality of elongated reinforcing members positioned in a spaced relationship along a spanwise extension of the blade. 3. A wind turbine blade according to claim 1, wherein at least one of the at least one elongated reinforcing member extends in a direction that forms an angle with relation to a spanwise extension of the blade ranging from 70° to 110°. 4. A wind turbine blade according to claim 3, wherein at least one of the at least one elongated reinforcing member extends in a direction that is substantially perpendicular to the spanwise extension of the blade. 5. A wind turbine blade according to claim 1, wherein at least one of the at least one elongated reinforcing member extends substantially perpendicular to the profile chord of the blade. 6. A wind turbine blade according to claim 1, wherein one of the at least one elongated reinforcing member forms an angle with another one of the at least one elongated reinforcing member. 7. A wind turbine blade according to claim 6, wherein the angle ranges from 15° to 135°. 8. A wind turbine blade according to claim 1, wherein at least one of the at least one elongated reinforcing member extends substantially parallel to the girder. 9. A wind turbine blade according to claim 1, wherein at least one of the at least one elongated reinforcing member forms an angle with the girder ranging from 0° to 70°. 10. A wind turbine blade according to claim 1, wherein at least one of the at least one elongated reinforcing member forms an angle with the girder ranging from 10° to 20°. 11. A wind turbine blade according to claim 1 wherein at least one of the at least one elongated reinforcing member is a flexible wire with high tensional strength without a capability of resisting compression forces. 12. A wind turbine blade according to claim 1, wherein at least one of the at least one elongated reinforcing member is made of reinforced plastic, wood, compressed fibres, or plant fibres with high cellulose content. 13. A wind turbine blade according to claim 1, wherein the at least one elongated reinforcing member is spaced from the girder by substantially a same distance as the at least one elongated reinforcing member is spaced from the trailing edge. 14. A wind turbine blade according to claim 1, wherein at least one of the at least one elongated reinforcing member forms an angle with the girder ranging from 0° to 40°. 15. A wind turbine blade according to claim 1, further comprising a mechanical connection, between each of the first and second ends and the shell. 16. A wind turbine blade according to claim 15, wherein the first and second ends extend through the shell and the mechanical connection includes an element engaging with the first and second ends. 17. A wind turbine blade according to claim 15, wherein the mechanical connection includes an anchor secured to the shell. 18. A wind turbine blade according to claim 1, wherein the at least one elongated reinforcing member includes a first elongated reinforcing member in a first row along a spanwise extension of the blade and a second elongated reinforcing member in a second row, between the first row and the girder closest to the trailing edge of the shell. 19. A wind turbine blade according to claim 18, wherein the first and second elongated reinforcing members cross each other along the profile chord of the blade. 20. A wind turbine blade according to claim 18, wherein the first and second elongated reinforcing members tilt towards each other along the profile chord of the blade. 21. A wind turbine blade according to claim 1, wherein the shell is made of fibre reinforced plastic material. 22. A method of increasing the strength of a wind turbine blade having a shell with a section having an aerodynamic profile, the method comprising: positioning at least one elongated reinforcing member inside the shell, each of the at least one elongated reinforcing member having a first end and a second end and extending between the first end and the second end;positioning at least one girder inside the shell; andconnecting the first end to an upper part of the shell itself and the second end to a lower part of the shell itself, the at least one elongated reinforcing member being positioned between and spaced apart from a girder of the at least one girder closest to a trailing edge of the shell and the trailing edge of the shell. 23. A wind turbine blade, comprising: a shell having a section with an aerodynamic profile, wherein the;at least one girder; andat least one elongated reinforcing member connected to the shell for increasing the strength of the blade, each of the at least one elongated reinforcing member being positioned between and spaced apart from a girder of the at least one girder closest to a trailing edge of the shell and the trailing edge of the shell, each of the at least one elongated reinforcing member having a first end and a second end and extending between the first end and the second end, wherein the first end is connected to an upper part of the shell and the second end is connected to a lower part of the shell thereby preventing deformation of the trailing edge of the shell, wherein at least one of the at least one elongated reinforcing member forms an angle with the girder ranging from 0° to 40°.