초록 ▼

A flange (20) for connection between an axial compressor and high-pressure rotor disc unit (14) in a gas turbine (10), wherein the flange (20) has a body (22) with a frusto-conical shape which is joined to a shaft (12) of the axial compressor by means of a hub (24) which has a cylindrical shape and

A flange (20) for connection between an axial compressor and high-pressure rotor disc unit (14) in a gas turbine (10), wherein the flange (20) has a body (22) with a frusto-conical shape which is joined to a shaft (12) of the axial compressor by means of a hub (24) which has a cylindrical shape and which, at the larger base of the frustum of the cone of the body (22) is connected to the rotor disc unit (14) by means of an extension (26) of the hub in the form of a circular ring, a circumferential recess (28) provided in a surface (29) of the extension (26) which faces the rotor disc unit (14) being connected by interference with a projection, which is complementary to the recess and is provided on the rotor disc unit (14); the body (22) has an outer generatrix which is inclined relative to the direction at right-angles to the axis (X) by an angle α1of between 25° and 35° and an inner generatrix which is inclined by an angle α2of between 12° and 18°.

대표청구항 ▼

1. A flange for connection between an axial compressor and a high-pressure rotor disc unit in a gas turbine, said flange including a body having a frusto-conical shape, said body being joined to a shaft rotatable about a machine axis of said axial compressor by a hub having a cylindrical shape, said

1. A flange for connection between an axial compressor and a high-pressure rotor disc unit in a gas turbine, said flange including a body having a frusto-conical shape, said body being joined to a shaft rotatable about a machine axis of said axial compressor by a hub having a cylindrical shape, said body being joined at a larger base of the frusto-conically-shaped body to said rotor disc unit by an extension of the hub in the form of a circular ring, said extension having a circumferential recess provided in a surface of said extension facing said rotor disc unit for connecting by interference with a projection complementary to the recess and provided on the rotor disc unit, said frusto-conically-shaped body having an outer generatrix inclined relative to a direction at right angles to the machine axis by an angle α2between 25° and 35°, said frusto-conical body having an inner generatrix inclined relative to the direction at right angles to the machine axis by an angle α2between 12° and 18°. 2. A flange according to claim 1 wherein said extension extends radially towards an exterior of said body in a direction at right angles to the machine axis and terminates in a diameter D5,said surface of said circumferential recess extending at right angles to the axis (X) at a diameter D4,the ratio between diameters D4and D5being between 0.7 and 0.85. 3. A flange according to claim 2 wherein said extension is connected to two inner and outer generatrices of the frusto-conical body, respectively, according to arcs of circumferences with radii R2and R1,respectively, the connection with the outer generatrix being formed to a diameter D1relative to the machine axis (X), the ratio between radii R2and R1being between 0.8 and 1 and the ratio between diameters D4and D1being between 0.95 and 1.05. 4. A flange according to claim 3 wherein said hub is connected to the outer generatrix of the frusto-conical body along an arc of circumference with a radius R3,the connection with the outer generatrix being formed in an area close to a diameter D1relative to the machine axis (X), the ratio between R2and R3being between 3.5 and 4.5, and the ratio between D4and D3being between 1.55 and 1.7. 5. A flange according to claim 2 wherein, at an end of the extension, said body has a thickness S1,measured at right angles to the direction assumed by the outer generatrix of the frusto-conically-shaped body, and, at the opposite end of said extension, said flange having a thickness S2measured in the direction of the machine axis (X), the ratio between S1and D4being between 0.13 and 0.18, and the ratio between S2and D4being between 1.3 and 1.7. 6. A flange according to claim 1 wherein the inner generatrix of the frusto-conical body is coupled to the hub in a direction (Y), which, relative to the machine axis (X), forms an angle α3of between 26° and 34°. 7. A flange according to claim 2 wherein said hub has a cylindrical shape and an inner diameter D2,the ratio between D4and D2being between 5.2 and 6.5. 8. A flange according to claim 1 characterized in that said extension has a series of circumferential through holes extending in directions parallel to the machine axis (X), between said surface and a surface of the extension facing said axial compressor, said through holes receiving elements for securing between said flange and said rotor disc unit. 9. A flange according to claim 8 wherein said elements comprise tie rods.