INTERNAL CASE FOR GAS-TURBINE INSTALLATION, PROTECTIVE JACKET OF SHAFT, UNIT OF CASE FOR GAS-TURBINE INSTALLATION AND GAS-TURBINE INSTALLATION Russian patent published in 2011 - IPC F01D25/12 F23R3/60 

FIELD: machine building.

SUBSTANCE: internal case of gas turbine installation is positioned between two combustion chambers and turbine and has two inlet orifices for hot gases of combustion chambers, orifice on turbine side and element directing hot gas. The element directing hot gas surrounds the protective jacket of the shaft between a compressor and a turbine; the said element has a directing section for hot gas direction. The directing section is equipped with a bush of the internal case enveloping the protective jacket of the shaft; the bush passes to the orifice on a turbine side and has a rib on surface facing the protective jacket of the shaft; the rib is positioned in a region bordering the orifice on the turbine side. The rib and/or bush of the internal case have channels for cooling fluid medium. Another invention of the group refers to the protective jacket surrounding a turbine rotor; this jacket is installed between the compressor and the turbine and has a recess in circumferential direction receiving the rib around the protective jacket. The recess is located in the bridge without channels for cooling fluid medium; the bridge is positioned on the section of the protective jacket of the shaft in the region of the outlet orifice of the internal case. Another invention of the group refers to the unit of the case of the gas turbine installation; the unit consists of the internal case and/or the above said protective jacket. One more invention refers to the gas-turbine installation consisting of two combustion chambers and of the case unit between the combustion chambers; also, the case unit is made as was above described.

EFFECT: increased reliability of gas turbine installation.

23 cl, 9 dwg