Ventilated turbine rotor

Abstract

TITLE: Ventilated Turbine Rotor The invention relates to a turbine rotor centered on an axis X and comprising: a disc (20) having a web (21), a shell (60) having an annular radial mounting flange (61), the radial flange (61) of the shell (60) being fixed to the web (21) by a fastening member (70), a flange (80) comprising a first wall (82) extending axially and a second wall (81) extending radially outwards from the first wall (82), a ventilation circuit (90) configured to connect a radially internal cavity (15) formed by a radially internal side of the shell (60), with a radially external cavity (16) delimited by the flange (80) and by the disc (20), the ventilation circuit (90) comprising a first opening (91) in the shell (60) in communication Fluidic with a second opening (92) in the flange. Figure 3

Claims

18.

19. presenting a volume accessible with a tool from the upstream side of the flange (80). Turbine, in particular a low pressure turbine, comprising a rotor according to any one of the preceding claims. Method for mounting a turbine rotor according to any one of claims 1 to 18, the method comprising: - shrink fitting of the flange (80) on the ferrule (60) by cooperation, on the one hand, between a first shrink fitting surface (87) of the flange (80) with a first complementary shrink fitting surface (67) of the ferrule (60), and on the other hand between an axial stop shoulder (64) of the ferrule (60) with a complementary axial stop shoulder (84) of the flange (80), - shrink-fitting of the disc (20) onto the flange (80) by cooperation between a second shrink-fitting surface (88) of the flange (80) and a second complementary shrink-fitting surface (28) of the disc (20), - fixing the radial flange (61) of the ferrule (60) against an upstream face of the disc (20) by bolting. [Fig. 1] 16 15 2c in RG. 4 [Fig. 5] FIG. 5 [Fig. 6A] FIG. 6A [Fig. 6B]

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