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Helical wind rotor, comprising at least two blades (1) which, as observed in cross section, are of substantially equivalent shape and curved, and are located parallel with the rotational axis (o) and so that the blades (1) are arranged most suitably at equal intervals with respect to the rotation an

Helical wind rotor, comprising at least two blades (1) which, as observed in cross section, are of substantially equivalent shape and curved, and are located parallel with the rotational axis (o) and so that the blades (1) are arranged most suitably at equal intervals with respect to the rotation angle of a cylindrical co-ordinate system (o, z). In order to bring about helical form of the wind rotor, the blade cross sections (sp) are arranged to revolve in the longitudinal direction (z) of the wind rotor. The blade cross section (sp) belonging to the wind rotor is arranged substantially different from the shape of semicircle, so as to enable manufacturing of the blade of a substantially planar blank. The invention also relates to a method for manufacturing a wind rotor of the above presented type.

대표청구항 ▼

1. A helical wind rotor, comprising:at least two blades, each of said at least two blades being curved in a substantially equivalent shape in a cross-section in a plane perpendicular to a rotational axis of the wind rotor, and being arranged parallel with the rotational axis, wherein the at least tw

1. A helical wind rotor, comprising:at least two blades, each of said at least two blades being curved in a substantially equivalent shape in a cross-section in a plane perpendicular to a rotational axis of the wind rotor, and being arranged parallel with the rotational axis, wherein the at least two blades am arranged at equal angular intervals around the rotational axis, wherein a blade cross section of each of said at least two blades is arranged to revolve about the rotational axis, wherein the blade cross section of said each of said at least two blades is shaped so that corresponding points in each of a plurality of sequential blade cross-sections of each of said at least two blades traces a shape of a helical screw-line on a respective blade surface, wherein each of said at least two blades corresponds to a planar unfolded blade defined by a portion of a circular annulus.