Means for adjusting the rotor blade of a wind power plant rotor
AssigneeGeneral Electric Company
InventorsRoland Weitkamp, Henning Lutze, Andre Riesberg, Jochen Anemuller
Life of this patent
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Abstract
Two independent adjusting systems are recommended for each rotor blade (6) for blade angle adjustment of the rotor blades (6) of the rotor of a wind power plant, assuring full redundancy of the blade angle adjustment. By suitable control of the individual adjustment paths of the two adjustment systems, additional advantageous effects can be gained, such as good lubricant distribution and/or even load distribution over time (FIG. 1).
Claims24
Means for adjusting a rotor blade (6) with its longitudinal axis extending out from a rotor hub (1) of a wind power plant through an azimuthal adjustment angle with respect to the longitudinal axis (7), characterized in that the means has two independent adjustment systems each of which produces adjustment of the rotor blade (6) even in case of failure of the other adjustment system.
Process for driving a means to adjust a rotor blade with its longitudinal axis extending out from a rotor hub of a wind power plant through an azimuthal adjustment angle with respect to the longitudinal axis, having two independent adjustment systems, each of which comprises an adjustable rotatable connection between the rotor blade and the rotor hub, characterized in that the two rotatable connections are driven relative to each other during the setting of a specified adjustment angle in a manner which favors even distribution of the lubricant in the rotatable connections.
Process for driving a means to adjust a rotor blade with its longitudinal axis extending out from a rotor hub of a wind power plant through an azimuthal adjustment angle with respect to the longitudinal axis, having two independent adjustment systems, each of which comprises an adjustable rotatable connection between the rotor blade and the rotor hub, characterized in that the two rotatable connections are driven relative to each other during the setting of a specified adjustment angle in a manner which favors even azimuthal distribution of load over the course of time.
Process for driving a means to adjust a rotor blade with its longitudinal axis extending out from a rotor hub of a wind power plant through an azimuthal adjustment angle with respect to the longitudinal axis, having two independent adjustment systems, each of which comprises an adjustable rotatable connection between the rotor blade and the rotor hub, in which the axes of rotation of the two rotatable connections are at an angle to each other, characterized in that the two rotatable connections are driven relative to each other in establishing a specified adjustment angle in such a manner as to give a specified spatial orientation of the long axis of the rotor blade.
Dependencies are inferred from the claim text.