Means for adjusting the rotor blade of a wind power plant rotor
AssigneeGeneral Electric Company
InventorsRoland Weitkamp, Henning Lütze, André Riesberg, Jochen Anemüller
Life of this patent
Estimating the term…
Abstract
Two independent adjusting systems are recommended for each rotor blade (6) for blade angle adjustments 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 adjustments systems, additional advantageous effects can be gained, such as good lubricant distribution and/or even load distribution over time (FIG. 1).
Claims23
An apparatus, comprising:
- means for adjusting 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, two independent adjustment systems each of which produces adjustment of the rotor blade even in case of failure of the other adjustment system, wherein each of the two adjustment systems has a rotatable connection between the rotor hub and the rotor blade that is adjustable by a drive and the two rotatable connections are arranged substantially concentric with each other.
A process for adjusting 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, using a drive 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 lubricant in the rotatable connections and are driven relative to each other in opposite directions when maintaining a constant adjustment angle of the rotor blade.
An apparatus, comprising:
- a first electric motor driven adjustment system having a first drive actuator 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;
- a second adjustment system having a second drive actuator to adjust the rotor blade through the azimuthal adjustment angle, the two adjustment systems being independent and each producing adjustment of the rotor blade even in case of failure of the other adjustment system, and wherein the first drive actuator and the second drive actuator are driven relative to each other in opposite directions when maintaining a constant adjustment angle of the rotor blade.
An apparatus, comprising:
- means for adjusting 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 characterized in that the means has two independent adjustment systems each of which produces adjustment of the rotor blade even in case of failure of the other adjustment system, wherein the two adjustment systems each have a rotatable connection between the rotor hub and the rotor blade which can be adjusted by a drive and that one of the two rotatable connections and its drive are placed at the rotor hub and the other rotatable connection and its drive is placed outside the rotor hub.
An apparatus, comprising:
- means for adjusting 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 a the longitudinal axis characterized in that the means has two independent adjustment systems each of which produces adjustment of the rotor blade even in case of failure of the other adjustment system, wherein each of the two adjustment systems has a rotatable connection between the rotor hub and the rotor blade which can be adjusted by a drive and that one of the two rotatable connections and its drive are placed at the rotor hub and the two rotatable connections are axially separated from each other.
Dependencies are inferred from the claim text.