Variable vane synchronizing mechanism for inner diameter vane shroud

摘要

A variable vane assembly includes a sync ring mechanism for synchronously rotating an array of variable vanes (26, 28). The variable vane assembly comprises a drive vane (26), a synch ring (38), a vane arm (34) and a plurality of follower vanes (28) and follower arms (34). An inner diameter end of the drive vane (26) rotates in an inner diameter vane shroud (14). The synch ring (38) rotates in an inner channel (30) of the inner diameter vane shroud (14). The vane arm (34) connects the inner diameter end of the drive vane (20) with the synch ring (38). The plurality of follower vanes (28) are connected to the synch ring (38) by the follower arms (34). When the drive vane (26) is rotated by an actuation source (18), the plurality of follower vanes (28) rotate a like amount by the synch ring (38) and follower arms (34).