Turbine rotor with means for preventing air leaks through outward end of spacer

Claim 1

A rotor comprising: a plurality of turbine discs each having a blade secured to an outer periphery of a turbine wheel; a spacer means mounted between two adjacent discs, said turbine discs, said spacer means and turbine shafts being assembled to form a turbine rotor; and means for preventing a leakage of air through an outer end of said spacer means of air flowing through an interior of said rotor to cool said blades, said means for preventing includes an annular projection formed on an axial end surface of each of said discs, said annular projecting extending axially toward said spacer means in such a manner that an inner annular surface of said annular projection is located in a superposed relationship to an outer cylindrical surface of said spacer means adjacent thereto, a circumferential groove formed in said outer cylindrical surface of said spacer means facing said inner annular surface of said annular projection, and a sealing means mounted in said circumferential groove for sealing a gap between said outer cylindrical surface of said spacer means and said inner annular surface of said annular projection under an action of centrifugal forces during an operation of said rotor.