LOW PRESSURE TURBINE STATOR FOR A GAS TURBINE ENGINE Russian patent published in 2023 - IPC F01D9/02 

FIELD: gas turbine engines.

SUBSTANCE: low-pressure turbine stator of a gas turbine engine, containing hollow nozzle vanes with outer and inner shelves located in the wheel space of the turbine, an outer casing forming an annulus together with the outer shelves, connected with the internal cavities of the nozzle vanes, connected, in turn, with the wheel space of the turbine, an inner ring forming an annulus with internal shelves, connected with an annulus formed by a high-pressure turbine rotor disk, a low-pressure turbine rotor disk and an inner ring, while the shank of each nozzle vane is of the “trunnion” type; it’s hollow, with an inner cylindrical surface, according to the invention, the annulus formed by the outer casing and the outer shelves is connected with the wheel space of the high-pressure compressor through the heat exchanger, while the stator additionally contains a ring-shaped shield mounted on the outer casing and forming an annulus with it, connected with the dummy cavity of the engine, hollow tubular elements, radially installed in the internal cavities of the nozzle vanes and connecting the annulus formed by the ring-shaped shield and the outer casing, with the annulus formed by the inner ring and inner shelves, plugs installed in the hollow shanks of the nozzle vanes without hollow tubular elements, wherein each hollow tubular element is connected to the outer casing by means of a spherical swivel assembly, and contacts the inner cylindrical surface of the shank corresponding to it with a spherical collar made at the terminal section of its outer surface.

EFFECT: reduction in air consumption due to the possibility of independent air supply to the internal cavities of the nozzle vanes and the turbine wheel space, which leads to saving air consumption and to a decrease in fuel consumption and an increase in engine efficiency as a whole.

1 cl, 4 dwg