Turbine sealing ring
The present application relates to an assembly for a turbine engine ( 1 ), comprising a first rotor ( 2 ) which is rotatable about a longitudinal axis (X-X) of the turbine engine ( 1 ), the first rotor ( 2 ) comprising a first arm ( 26 ); a second rotor ( 3 ) which is rotatable about the longitudinal axis (X-X) and comprises a second arm ( 36 ); a first sealing ring ( 4 ) which is centred on the longitudinal axis (X-X), is arranged radially outside the first arm ( 26 ) and comprises a first radial flange ( 40 ) fixedly mounted between the first arm ( 26 ) and the second arm ( 36 ); and a second sealing ring ( 5 ) which is separate from the first sealing ring ( 4 ), is centred on the longitudinal axis (X-X) and is arranged radially outside the second arm ( 36 ), the second sealing ring ( 5 ) comprising a first part ( 51 ) which is designed to come into contact with the second rotor ( 3 ), and a second part ( 52 ) which is separate from the first part ( 51 ) and is designed to come into contact with the first sealing ring ( 4 ).
1. An assembly comprising:
a first rotor movable in rotation about a longitudinal axis of a turbomachine, the first rotor comprising a first arm;
a second rotor movable in rotation about the longitudinal axis, and comprising a second arm fixed to the first arm;
a first ring centered on the longitudinal axis, the first ring comprising a first radial flange fixedly mounted between the first arm and the second arm, the first ring having a first radially outer surface and a first radially inner surface, and the first ring comprising sealing wipers extending radially outwardly from the first radially outer surface; and
a second ring centered on the longitudinal axis the second ring having a second radially outer surface positioned facing and at a distance from the first radially inner surface of the first ring, the second ring being configured so that the second radially outer surface comes into contact with the first radially inner surface upon thermal expansion of the second ring.
2. The assembly of claim 1 , wherein the second rotor has a second radially inner surface and the second ring has a third radially outer surface positioned facing and at a distance from the second radially inner surface, the second ring being configured so that the third radially outer axial surface is comes into contact with the second radially inner surface upon thermal expansion of the second ring.
3. The assembly of claim 1 , wherein the second ring has a contacting surface contacting the second rotor, a groove being provided in the contacting surface, the assembly further comprising a seal arranged within the groove.
4. The assembly of claim 1 , wherein one of the second arm and of the second ring comprises a lug, the other of the second arm and of the second ring comprising a notch, the lug cooperating with the notch to prevent a circumferential movement of the second ring relative to the second rotor.
5. The assembly of claim 1 , wherein an orifice is provided in the second ring so as to allow a circulation of a fluid between a first cavity arranged radially inside the second ring and a second cavity arranged radially outside the second ring.
6. The assembly of claim 1 , wherein the second rotor comprises:
a disk,
a blade connected to the disk, and
a retaining ring arranged within the second rotor and configured to prevent axial movement of the blade relative to the disk,
the second ring contacting the retaining ring.
7. A turbine section comprising the assembly of claim 1 and a nozzle, the nozzle being arranged between the first rotor and the second rotor, and comprising an abradable configured to cooperate with the sealing wipers of the first ring.
8. A turbomachine comprising the turbine section of claim 7 .
9. An aircraft comprising the turbomachine of claim 8 .
10. A turbomachine comprising:
the assembly of claim 1 ; and
a casing, the first rotor and the second rotor being movable relative to the casing.
11. An aircraft comprising the turbomachine of claim 10 .