Rotor for gas turbine engine

A gas turbine engine comprising a shaft adapted to rotate about a rotation axis and a rotor fixed to the shaft, the rotor including a body having a solid-of-revolution-shaped portion centered around the rotation axis, the body having a bore extending axially along the rotation axis and receiving the shaft therein, the bore defined within a peripheral surface of the body circumferentially extending around the rotation axis, the body having an annular cavity extending between two opposite annular wall portions of the body, the two opposite annular wall portions extending away from radially-inner ends thereof and joining each other at a radially-outer end of the annular cavity, the radially-inner ends of the two opposite annular wall portions defining seats located radially outwardly from the peripheral surface and radially inwardly from the annular cavity, the annular cavity extending radially outwardly from the seats, the rotor further having a plurality of structural plates circumferentially interspaced from one another by corresponding spacings, the plurality of structural plates extending radially relative to the rotation axis from inner surfaces facing the rotation axis to opposed outer surfaces, the plurality of structural plates having opposed ends extending axially along axial lengths of the seats and extending radially from the inner surfaces to the outer surfaces, the opposed ends mounted to and extending between the seats in the two opposite annular wall portions and forming an interference fit therewith, the opposed ends of the plurality of structural plates outside of the annular cavity and outside of the bore.

A method of manufacturing a rotor of a gas turbine engine comprising:

• providing a rotor body, the rotor body being solid and having a solid-of-revolution-shaped portion centered around a rotation axis of the rotor, the rotor body having a bore extending axially along the rotation axis and configured for receiving a shaft therein, the bore defined within a peripheral surface circumferentially extending around the rotation axis;
• forming an annular cavity in the rotor body, the annular cavity extending between two wall portions of the rotor body, the two wall portions extending away from radially-inner ends thereof and joining each other at a radially-outer end of the annular cavity, forming seats in the radially-inner ends of the two wall portions, the seats located radially outwardly from the peripheral surface and radially inwardly from the annular cavity, the annular cavity extending radially outwardly from the seats;
• and
• mounting a plurality of structural plates between the seats in the two wall portions with an interference fit, disposing opposed ends of the plurality of structural plates entirely radially between the peripheral surface and the seats relative to the rotation axis, the opposed ends extending axially along axial lengths of the seats and extending radially from inner surfaces to outer surfaces of the plurality of structural plates, and circumferentially interspacing the plurality of structural plates from one another by corresponding spacings.