Patent ID: 8632302

Claim:
A compressor performance adjustment system, comprising: a compressor chassis defining an inlet passageway, a diffuser passageway coupled to the inlet passageway, and a return passageway extending from the diffuser passageway; at least one inlet vane located in the inlet passageway; at least one diffuser vane located in the diffuser passageway; a plurality of return vanes located in the return passageway; an annular return vane actuation member coupled to each of the plurality of return vanes and operable to rotate about a return vane actuation member axis in order to move the plurality of return vanes relative to the compressor chassis; a plurality of actuation channels defined by the annular return vane actuation member and located about the circumference of the annular return vane actuation member, each return vane of the plurality of return vanes being located in a respective actuation channel of the plurality of actuation channels via a return vane pin extending from each return vane of the plurality of return vanes; a first actuator rod pivotally coupled to a first arm and the first actuator rod configured to rotate the annular return vane actuation member about the return vane actuation member axis; a translation rod having a first end thereof coupled to the first arm; and a second arm coupled to a second end of the translation rod opposite the first end and the second arm coupled to the annular return vane actuation member via an actuation pin.