Rotor blade comprising a plurality of individual sections
AssigneeMesserschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftung
InventorsRolf Doellinger, Rudolf Schindler, Dieter Franz
Life of this patent
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Abstract
A rotor blade, for example for a windmill, comprises a plurality of blade ctions between a blade root and a tip. The sections are interconnected by tensioning members such as steel cables or the like, preferably extending through the blade sections. Thus, each section may be manufactured individually and all components may be assembled at the construction site, whereby relatively large windmill rotors may be constructed.
Claims13
A large scale rotor blade having a longitudinal, radially extending axis, comprising a plurality of individual blade sections (2) forming pressure bodies extending in the longitudinal, radial direction of the rotor blade axis, each blade section having an end surface which forms an interface with an end surface of the adjacent blade section in an end to end fitting relationship, tensioning means (16) extending longitudinally relative to said individual sections for providing a pulling force which holds the individual sections together, anchoring means (20, 21) securing both ends of said tensioning means, said anchoring means and adjacent blade sections providing an exclusively form-fit connection between adjacent blade sections (2), adjustment means (17, 18) operatively connected to one end of said tensioning means for adjusting said pulling force applied by said tensioning means to operatively hold all individual sections of the rotor blade together, whereby said individual sections may be assembled to form large blades, said rotor blade further comprising a plurality of bushings (22) extending through each interface to form locking means (22) which together prevent any rotation of said blade sections (2) relative to one another about said rotor blade axis, and wherein said tensioning means (16) extend through said bushings (22) at a small, acute angle relative to the longitudinal rotor blade axis.
A large scale rotor blade having a longitudinal, radially extending axis, comprising a plurality of individual blade sections (2) forming pressure bodies extending in the longitudinal, radial direction of the rotor blade axis in an end to end fitting relationship, tensioning means (16) extending longitudinally relative to said individual sections for providing a pulling force which holds the individual sections together, anchoring means (20, 21) securing both ends of said tensioning means, said anchoring means and adjacent blade sections providing an exclusively form-fit connection between adjacent blade sections (2), adjustment means (17, 18) operatively connected to one end of said tensioning means for adjusting said pulling force applied by said tensioning means to operatively hold all individual sections of the rotor blade together, whereby said individual sections may be assembled to form large blades, said rotor blade further comprising locking means (22) for preventing any rotation of said blade sections (2) relative to one another about said rotor blade axis, and wherein said tensioning means (16) extend at a small, acute angle relative to the longitudinal rotor blade axis, wherein said individual rotor blade sections (2) forming pressure bodies comprise an outer shell (12o) of fiber compound material having radially inwardly directed end flanges and an inner tubular member (12u) having at least one radially outwardly directed flange and fitting into said outer shell (12o), and wherein said tensioning means comprise endless loops (16) and bolts (20, 21) around which said endless loops run, whereby the tensioning means and said pressure bodies of the rotor blade are constructed to be individually replaceable for the purpose of maintenance and repair.
Dependencies are inferred from the claim text.