DEVICE FOR REVERSING A BLADE OF A RUNNER UNIT

摘要

The present invention generally relates to a runner unit of a tidal power plant, and more particular to a device for reversing a blade of the runner unit. The device according to the invention is lighter and more efficient with respect to known solutions which involve articulated mechanisms as it is based on an auxiliary servomotor including a reciprocating linear rack which acts on the blade to be reversed.

主权项

1. A device for reversing a blade of a runner unit, the device comprising:
an annular lever fixed to a trunnion portion of the blade and rotatably mounted on the runner unit; a main servomotor comprising a piston adapted to reciprocate along a shaft of the runner unit and coupled to said annular level such to cause a first rotation of the blade until said piston reaches a dead zone position; an auxiliary servomotor arranged to cause a further rotation of the blade; wherein said auxiliary servomotor comprises a reciprocating linear rack configured to cooperate with a toothed sector provided on said annular level when said piston is at or in proximity of said dead zone position.