Rotor for a gas turbine engine comprising a rotor spool and a rotor ring
View Patent ↗A one-piece rotor spool for a gas turbine engine extending along the axis of the engine is disclosed. The spool includes an upstream portion and a downstream portion that are radially offset relative to one another. The radially outer downstream portion includes a plurality of housings for rotor blades formed in the outer surface of the radially outer downstream portion. The radially inner upstream portion includes an attachment mechanism designed to interact with a rotor ring in order to prevent a tangential movement of the rotor ring relative to the radially inner upstream portion.
1. A rotor for a gas turbine engine comprising:
a one-piece rotor spool extending along an axis of the engine, the spool comprising a cylindrical radially inner portion and a cylindrical radially outer portion that are radially offset from each other; and
a cylindrical rotor ring which is independent from the spool such that the ring is separable from and mountable on the spool,
wherein the radially outer portion includes a plurality of housings for rotor blades formed in an outer surface of the radially outer portion,
wherein the rotor ring includes a plurality of housings of rotor blades formed in an outer surface of the ring, and
wherein an outer circumferential surface of the radially inner portion of the spool includes an attachment mechanism which cooperates with an attachment device of the rotor ring, which is formed in an inner circumferential surface of the ring in order to prevent a tangential movement of the rotor ring relative to the rotor spool, an outer diameter of the outer circumferential surface of the radially inner portion being substantially equal to an inner diameter of the inner circumferential surface of the ring.
2. The rotor as claimed in claim 1 , wherein the attachment mechanism is arranged in order to allow an axial movement of the rotor ring relative to the radially inner portion.
3. The rotor as claimed in claim 1 , wherein the attachment mechanism includes attachment teeth extending radially outward.
4. The rotor as claimed in claim 1 , wherein the radially outer portion of the spool is downstream of the radially inner portion.
5. The rotor as claimed in claim 1 , wherein the attachment device comprises attachment recesses extending radially inward.
6. A gas turbine engine comprising a rotor as claimed in claim 5 .
7. The rotor as claimed in claim 1 , wherein the spool includes a frustoconical central portion connecting the radially inner portion and the radially outer portion.