Wind turbine blade and a method for manufacturing a wind turbine blade
AssigneeVestas Wind Systems A/S
InventorFrank Hoelgaard Hahn
Life of this patent
Estimating the term…
Abstract
A wind turbine blade with shear distortion resistance includes a root end and a tip end, a leading edge and a trailing edge, and a suction side shell and a pressure side shell between which there are first and second shear webs. The first and second shear webs are arranged in a V-configuration in a chordwise cross section of the blade, whereby at least one of the first and second shear webs is non-orthogonal to the chord line, and the first and second shear webs are non-parallel. A method of manufacturing the wind turbine blade includes providing respective upper and lower mould halves for the blade and interconnecting the first and second shear webs by an elastic structure biasing the shear webs towards one another before closing the mould.
Claims18
A wind turbine blade comprising:
- a root end and a tip end;
- a leading edge and a trailing edge, wherein the leading edge and the trailing edge extend in a lengthwise direction of the blade from the root end of the blade towards the tip end;
- a suction side shell and a pressure side shell;
- at least one airfoil defined by the suction side shell and the pressure side shell, the airfoil having a chord line interconnecting the leading edge and the trailing edge in a chordwise direction of the blade;
- at least a first and a second shear web, each of which interconnects the suction side shell and the pressure side shell;
- wherein, in a chordwise cross section of the blade:
- the first and second shear webs are arranged at a mutual distance in the chordwise direction of the blade;
- at least one of the first and second shear webs is non-orthogonal to the chord line in said chordwise cross section;
- the first and second shear webs are non-parallel;
- and
- wherein the first and second shear webs are arranged in a V-configuration when seen in the chordwise cross section of the blade at one or more lengthwise positions between 5% and 50% of the length of the blade when measured from the root towards the tip.
A wind turbine blade comprising:
- a root end and a tip end;
- a leading edge and a trailing edge, wherein the leading edge and the trailing edge extend in a lengthwise direction of the blade from the root end of the blade towards the tip end;
- a suction side shell and a pressure side shell;
- at least one airfoil defined by the suction side shell and the pressure side shell, the airfoil having a chord line interconnecting the leading edge and the trailing edge in a chordwise direction of the blade;
- at least a first and a second shear web, each of which interconnects the suction side shell and the pressure side shell;
- wherein, in a chordwise cross section of the blade:
- the first and second shear webs are arranged at a mutual distance in the chordwise direction of the blade;
- at least one of the first and second shear webs is non-orthogonal to the chord line in said chordwise cross section;
- and
- the first and second shear webs are non-parallel;
- at least one spar structure at the suction side shell and at least one spar structure at the pressure side shell, wherein:
- the first and second shear webs attach to the suction side and pressure side shells at the spar structures at respective attachment points;
- and
- a first chordwise distance between attachment points of the first and second shear webs at the suction side shell is different from a second chordwise distance between attachment points of the first and second shear webs at the pressure side shell;
- the spar structures comprise two separated first spar caps at the suction side shell and a single second spar cap at the pressure side shell;
- and
- the first and second shear webs attach to respective ones of the first spar caps at the suction side shell and to the single second spar cap at the pressure side shell.
Dependencies are inferred from the claim text.