FLOWPATH BOUNDARY AND ROTOR ASSEMBLIES IN GAS TURBINES

摘要

A gas turbine that having a flowpath having a rotor assembly that includes: a first rotor wheel supporting a first rotor blade having a platform that defines a first axial section of an inner boundary of the flowpath; a second rotor wheel supporting a second rotor blade having a platform that defines a second axial section of the inner boundary of the flowpath; and an annulus filler that includes an outboard surface that defines at least part of a third axial section of the inner boundary of the flowpath occurring between the first axial section and the second axial section of the inner boundary of the flowpath. The first rotor wheel may include an axial connector for axially engaging a mating surface formed on a radially innermost face of the first rotor blade and a mating surface formed on a radially innermost face of the annulus filler.

主权项

1. A gas turbine that includes a flowpath having a rotor assembly, the rotor assembly comprising:
a rotor wheel supporting a rotor blade, the rotor blade comprising a platform that defines an axial section of an inner boundary of the flowpath; an annulus filler residing adjacent to the rotor blade, the annulus filler comprising an outboard surface that defines an adjacent axial section of the inner boundary of the flowpath, wherein the rotor wheel comprises a connector for axially engaging both a mating surface formed on a radially innermost face of the rotor blade and a mating surface formed on a radially innermost face of the annulus filler; and an axial retainer formed between the annulus filler and the rotor wheel for axially retaining the rotor assembly against movement in at least one of a forward axial direction and an aftward axial direction; wherein the axial retainer comprises an elongated radial protruding rib formed on the annulus filler that engages a mating groove formed on the rotor wheel.