초록 ▼

A device for positioning of nozzles of a stator stage and for cooling of rotor discs in gas turbines, of the type including nozzle segments consisting of several airfoils. Each nozzle segment is connected at its top to an outer ring to define a chamber containing cooling air and is positioned at its

A device for positioning of nozzles of a stator stage and for cooling of rotor discs in gas turbines, of the type including nozzle segments consisting of several airfoils. Each nozzle segment is connected at its top to an outer ring to define a chamber containing cooling air and is positioned at its base on an inner ring. The nozzle segments form a circumferential array about the axis of the gas turbine. In each airfoil of the nozzle segment, there is provided at least one tube, which is inserted in a corresponding duct inside the airfoil for delivering cooling air to the first and second stage discs.

대표청구항 ▼

1. A stator stage for cooling high and low pressure rotor discs of a gas turbine, comprising:a turbine housing; an annular array of nozzle segments carried by said turbine housing, each said nozzle segment including a plurality of airfoils; an outer ring carried by said housing adjacent an outer mar

1. A stator stage for cooling high and low pressure rotor discs of a gas turbine, comprising:a turbine housing; an annular array of nozzle segments carried by said turbine housing, each said nozzle segment including a plurality of airfoils; an outer ring carried by said housing adjacent an outer margin of each nozzle segment and defining with said housing a chamber for containing cooling air; an inner ring carried by said housing, said nozzle segments being disposed between said outer ring and said inner ring; at least one airfoil of each nozzle segment having a passage in communication between said chamber and a location adjacent said high and low pressure discs for supplying cooling air from said chamber to said location to cool said discs; said outer ring having an additional mobile ring movable to compensate for differential thermal expansion between said housing and said outer ring.