Turbine having device for cooling and supercharging turbine

The invention relates to a turbomachine comprising a device for ventilating and pressurizing a turbine rotor of a turbomachine having an axis (A), the device comprising at least one collecting tube, the at least one collection tube is adapted to collect a portion of the air circulating in the high pressure compressor of the turbine and to deliver this portion of the air to a first internal chamber (39) inside the turbine, the first internal chamber being in communication with a second internal chamber (40) delimited by the rotor (23) of the turbine (24), the first and second chambers (39, 39 ') being in communication with the second internal chamber (40). The first and second chambers (39, 40) are at least partially separated by a fixed shroud (56) having an axis (A), characterized in that the device comprises at least one injector (58) passing through the fixed shroud (56) and having a cross-section that varies in response to a pressure difference between said first and second chambers (39, 40). 本发明涉及一种涡轮机，该