Air supply device of the ventilation of the blades of the low pressure turbine of a gas turbine engine; segment for the axial stop and the ventilation of the blades of the low pressure turbine

摘要

The present invention relates to a device for feeding ventilation air in a turbine rotor of a gas turbine engine comprising a first and second disks (11, 12) of the turbine and a ring (14) downstream together forming a single-block drum, the second disk (12) of a turbine comprising cavities machined in the rim (12j) in order to house the blades (6) of the turbine, the blades being retained axially by the segments (18, 18 ′) of axial retention. The device is characterized by the fact that at least one hole (12p) is formed in the shell (14) downstream of the rim (12j) connecting the interior of the drum, with at least a portion of said cells, a passage (18p, 18 ′ p) being provided in the segments (18, 18').