METAL HEAT INSULATING TILES FOR GAS TURBINE COMBUSTION CHAMBER Russian patent published in 2023 - IPC F23R3/04 F02C7/18 

FIELD: gas turbine engines.

SUBSTANCE: metal heat insulating tile for a combustion chamber of a gas turbine engine includes a protective plate (25) having a first surface (25a), a second surface (25b) opposite to the hot surface (25a), and a back edge (18b). The outer rim (27) extends from the protective plate (25) in the direction opposite to the first surface (25a) and has side sections (27a, 27b) and a rear section (27c). The first surface (25a) of the protective plate (25) is made as a section of the surface of rotation around the central axis (AC). Seal holes (30, 31) are provided in the outer rim (27) and include side seal holes (30) in the side sections (27a, 27b) and rear seal holes (31) in the back section (27c). Each side seal hole (30) has a corresponding side hole axis (AS) forming a first angle (α)±15° with the first reference plane (P1). The projection of the corresponding axis (AS) of the side hole onto the first reference plane (P1) forms a second angle (β)±30° with the second reference plane (P2) perpendicular to the central axis (AC). The first reference plane (P1) is parallel to the central axis (AC) and perpendicular to the median plane (PM) of the first surface (25a) of the protective plate (25) which includes the central axis (AC). The sealing action thus achieved is extremely effective in preventing suction of hot gas between adjacent tiles, and in particular at the side of the tiles.

EFFECT: as a consequence of the efficient hot gas evacuation and deflection, thermal insulation tiles require reduced sealing air flow and improve the efficiency and performance of gas turbine engines.

16 cl, 12 dwg