Turbine shroud with forward case and full hoop blade track
AssigneeRolls-Royce North American Technologies Inc.
InventorsEdward C. Rice, Daniel K. Vetters
Life of this patent
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Abstract
A gas turbine engine includes a turbine shroud assembly arranged around a turbine wheel assembly. The turbine shroud assembly includes an annular turbine case, a blade track, and a forward case. The turbine case is arranged around a central axis of the turbine assembly. The blade track is located radially between the turbine case and the central axis. The forward case is coupled to the turbine case and is arranged to block axial movement of the blade track relative to the turbine case.
Claims20
A turbine assembly for a gas turbine engine, the turbine assembly comprising
- a turbine case arranged around an axis,
- a full hoop blade track comprising ceramic matrix composite materials located radially between the turbine case and the axis, the blade track having a leading edge and a trailing edge axially spaced apart from the leading edge,
- a metallic carrier arranged circumferentially around the blade track to define a chamber located radially between the carrier and the blade track, and
- a metallic forward case coupled with the turbine case and interlocked with the leading edge of the blade track to block circumferential and axial movement of the blade track relative to the turbine case while allowing radial movement of the blade track relative to the turbine case.
A turbine assembly for a gas turbine engine, the turbine assembly comprising
- a turbine case arranged around an axis,
- a blade track having a leading edge, a trailing edge axially spaced apart from the leading edge, and a tang that extends axially forward away from the leading edge, and
- a forward case that includes an axial runner coupled with the turbine case and a locator flange that extends radially inward away from the axial runner, the locator flange formed to define a cutout that extends radially outward into the locator flange, and the tang included in the blade track being located in the cutout.
A method comprising
- providing an annular turbine case arranged around an axis, a full hoop blade track having a leading edge and a trailing edge axially spaced apart from the leading edge, a forward case having an axially extending axial runner and a radially inwardly extending locator flange, and a carrier arranged to define an inwardly facing chamber,
- locating the carrier circumferentially around the blade track so that the inwardly facing chamber is aligned axially with the blade track,
- fastening the axial runner of the forward case to the turbine case, and
- interlocking the leading edge of a blade track with the locator flange of the forward case.
Dependencies are inferred from the claim text.