F - Mech Eng,Light,Heat,Weapons – 03 – D
Patent
F - Mech Eng,Light,Heat,Weapons
03
D
F03D 7/02 (2006.01) F03D 11/00 (2006.01) B64C 11/30 (2006.01)
Patent
CA 2560815
The present invention relates to an actuator for adjusting the pitch angle of a rotor blade of a wind turbine, which is rotatably mounted on a rotor hub, comprising a first drive element connectable with the rotor blade, a second drive element in meshing engagement with said first drive element, as well as a lubricating device for lubricating the two drive elements. The invention furthermore relates to a rotor with a rotor hub, on which at least one rotor blade is rotatably mounted, whose pitch angle can be adjusted by an actuator as mentioned above. Finally, the invention relates to a wind turbine comprising such rotor and such actuator. There is proposed a selective lubrication of the zero teeth of the gear stage of the actuator, which advantageously considers the rotary position of the drive elements of the gear stage with respect to each other. In accordance with the invention, the lubricating device includes a lubricant passage for the selective supply of lubricant to the portion of the first drive element and/or the portion of the second drive element meshing therewith, which are in engagement with each other in the working position of the rotor blade, as well as a supply control means for controlling the supply of lubricant through said lubricant passage in dependence on the engagement position of the two drive elements or the rotary position of the rotor blade. The supply control means ensures that the zero tooth of the first drive element and/or of the second drive element only is lubricated when the two drive elements are in the proper position for this purpose. In particular, the supply control means can provide that lubrication only is effected when the two zero teeth of the two drive elements actually are in engagement with each other and lubrication is not effected when, for instance under too strong wind, the rotor blades are turned out of the wind.
Liebherr-Werk Biberach Gmbh
Shapiro Cohen
LandOfFree
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