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Rack and pinion variable vane synchronizing mechanism for inner diameter vane shroud

  • US 7,665,959 B2
  • Filed: 07/20/2005
  • Issued: 02/23/2010
  • Est. Priority Date: 07/20/2005
  • Status: Expired due to Fees
First Claim
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1. A variable vane shroud mechanism for use in a turbine engine, the vane shroud mechanism comprising:

  • an inner diameter vane shroud for receiving inner diameter ends of an away of variable vanes, the shroud comprising;

    a plurality of radially extending vane sockets;

    an internal synchronizing cavity extending circumferentially across a width of the vane shroud adjacent the plurality of sockets;

    an arcuate body portion comprising a forward shroud component and an aft shroud component each comprising;

    a mating surface comprising;

    a plurality of partial vane sockets; and

    an internal surface defining a portion of the internal synchronizing cavity;

    wherein the mating surfaces of the forward and aft shroud components mate such that the plurality of partial vane sockets form the plurality of radially extending sockets, and the internal surfaces form the internal synchronizing cavity; and

    a three-sided gear track extending axially from the plurality of partial vane sockets on the aft shroud component, the internal surface of the aft shroud component comprising a portion of the gear track; and

    a synchronizing mechanism positioned internally within the variable vane shroud to interface with the inner diameter ends of the away of variable vanes such that rotation of individual variable vanes comprising the away of variable vanes is coordinated.

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