WINDFARM BLADE DRIVE EXPLOITING WINDWHEEL KINETIC ENERGY Russian patent published in 2009 - IPC F03D7/04 

FIELD: engines and pumps.

SUBSTANCE: invention relates with windfarms, namely to blade turning mechanism. The windfarm blades drive comprises blade pitch adjusting shaft arranged coaxially in the main shaft inner space and linked up with the blades, reversing brake and control unit. The said reversing brake incorporates a spring retainer and input connected with the control unit first input. The proposed drive additionally comprises two disks fitted on the blade pitch adjusting shaft and comprising stops and direct-action brakes on every disk, locking brake arranged between the main shaft and aforesaid blade pitch adjusting shaft and starter fitted on one of the disks. Every disk forms with the blade pitch adjusting shaft a wheel pair, one form a L.H. rotation pair the other one a R.H. rotation pair. Every disk has angular shit limiters and direct-action independent-control brake. The first disk brake input is connected with the control unit fourth output, while the second disk brake input is connected to the control unit second output. The main and blade pitch adjusting shafts are linked up by a common locking brake with its input connected to the control unit fifth output. The starter fitted on one of the disks is designed to start windfarm and incorporates an input connected to the control unit third output.

EFFECT: higher reliability and longer life, ease of manufacture and operation, lower production and operating costs.

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