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Rotor thrust balance activated tip clearance control system

  • US 7,909,566 B1
  • Filed: 04/17/2007
  • Issued: 03/22/2011
  • Est. Priority Date: 04/20/2006
  • Status: Expired due to Fees
First Claim
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1. A gas turbine engine with a blade tip clearance control, the engine comprising:

  • a rotor shaft extending along an axis of the engine;

    a turbine rotor disc having a plurality of turbine rotor blades extending therefrom;

    a turbine blade tip shroud forming a blade tip gap with the plurality of turbine rotor blades;

    a compressor rotor disc having a plurality of compressor blades extending therefrom;

    a rotor shaft bias means to bias the rotor shaft in a direction such that the turbine rotor blade tip clearance increases;

    a pressure force developed from the engine operation and acting on the compressor and turbine rotor discs to bias the rotor shaft in a direction such that the turbine rotor blade tip clearance decreases;

    the rotor shaft is a horizontal aligned rotor shaft; and

    ,the rotor shaft bias means is a compression spring.

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