Variable geometry nozzles for turbomachines.

摘要

A variable geometry nozzle for turbo machines comprising an axially translatable member and a plurality of flaps (38,43) spaced circumferentially around the axis of the duct. The flaps (38) are pivotally attached to the axially translatable member (28) and are provided with a cam follower (40) that cooperates with a cam (37). The cams (37) are fixed relative to the duct (17(c)) and thereby define the attitude of each flap (38) relative to the member (28). Seal plates cover the gaps between adjacent flaps (38) and (43). A plurality of struts interconnect the member (28) end the second flaps of the pivotal attachment of the flaps (43) to the flap (38). A set of flaps (47) are provided to provide fairing between the downstream ends of the member (28) and the flaps (43). In operation, axial movement of the member (28) moves the flaps (38) and (43) to different positions.