Patent ID: 7520716

Claim:
A vane system for a centrifugal compressor ( 10 ), comprising two rows of vanes installed in series inside a suction duct, a first row of fixed vanes being suitable for homogenizing a gas flow passing through them and sending it to a second row of adjustable vanes, said second row being equipped with a guiding mechanism comprising a mechanical system suitable for varying an orientation of the vanes, the mechanical system including a connection of each adjustable vane of the second row to a shaft by a first leverage suitable for receiving a rotation imparted by an actuator, each adjustable vane being connected, through a respective foot produced in the form of a shaft, to the first leverage, in turn connected by a first rotating ring pin, to a disk which receives rotational movement induced by the shaft, and the first leverage comprises a lever fixed at one end to said foot of the adjustable vane and hinged at the other end to a tie rod by a second rotating ring pin.