GAS TURBINE ENGINE (VERSIONS) Russian patent published in 2017 - IPC F01D25/14 F01D25/16 F01D25/30 

FIELD: engine devices and pumps.

SUBSTANCE: gas turbine engine comprises an outer casing, an exhaust gas outlet channel, a cooling channel, a panel structure and an air duct. The exhaust gas outlet channel is located inside the outer casing and contains outer and inner walls of the channel forming an annular passage and extending radially inward from the outer casing. The cooling channel is connected to outer surface of the outer casing and has a channel inlet and a channel outlet. The panel structure is arranged around the outer casing and radially spaced from its outer surface to form the cooling channel therebetween. The panel structure comprises a plurality of panel sections with gaps axially extending between the adjacent panel sections located at a distance along the circumference, wherein the gaps provide passage of ambient air into the cooling channel. The air duct includes an inlet end in fluid communication with the outlet of the channel, and an outlet end in fluid communication with the reduced pressure area relative to the inlet end of the air duct. An outlet cavity is arranged in the outlet end area of the air duct, in which a reduced pressure is generated to draw air from the cooling channel into the air duct. In another embodiment, the gas turbine engine includes a spacer extending from the outer casing to the bearing casing, and a screening structure surrounding the spacer to protect thereof from the exhaust gases. In further embodiment of the gas turbine engine, the outer casing comprises an exhaust casing comprising flanges located upstream and downstream and extending radially outside from the outer surface of said outer casing. The panel structure comprises an upstream end fixed on an upstream flange, and a downstream end fixed on the downstream flange.

EFFECT: group of inventions makes it possible to increase the reliability of the gas turbine engine by providing cooling of its outer casing.

17 cl, 14 dwg