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US 4,740,138 AGranted
Device for controlling the throat areas between the diffusor guide vanes of a centrifugal compressor of a gas turbine engine
AssigneeMTU Motoren-und Turbinen München GmbH
InventorsGerhard Zaehring, Christian Prodehl
Life of this patent
Estimating the term…
Abstract
This device provides the diffusor guide vanes with bypass ducts which establish communication between the pressure and suction sides, which can be sealed by means of shut-off elements, which take the form of bimetal components or at least are connected to such a component, and which are deformed flap-fashion as a function of temperature.
Claims13
A duffusor guide vane construction for a radial compressor of a gas turbine engine or the like turbo machinery, comprising:
- a diffusor guide vane which exhibits a pressure side and a suction side when in an in-use position in a turbo machine,
- a bypass duct extending through the diffusor guide vane for communicating the pressure side with the suction side, said bypass duct including a recess,
- and a thermally responsive control flap means mounted at the recess in the bypass duct, said control flap means being operable in dependence on engine operating induced temperature conditions to be automatically moveable between a bypass duct blocking position where it forms a continuous surface closing the inlet end of the bypass duct and a bypass duct opening position where it is fully retracted into the recess means to form part of a continuous open duct,
- wherein said movement of the control flap means is controlled by thermally responsive bimetal components.
1 more element
Dependencies are inferred from the claim text.