Full hoop blade track with axially keyed features
AssigneeROLLS-ROYCE plc
InventorsJeffrey A. Walston, Aaron D. Sippel, John A. Weaver, David J. Thomas
Life of this patent
Estimating the term…
Abstract
A turbine shroud for a gas turbine engine includes an annular metallic carrier, a blade track, and a cross-key connection formed between the annular metallic carrier and the ceramic blade track. The cross-key connection locates the ceramic blade track relative to the metallic carrier.
Claims20
A turbine shroud for use in a gas turbine engine having a central axis, the turbine shroud comprising
- an annular metallic carrier,
- a one-piece annular ceramic runner concentric with the annular metallic carrier that extends around the central axis, the one-piece annular ceramic runner having a surface that faces radially outward away from the central axis, and
- a cross-key connection formed between the annular metallic carrier and the one-piece annular ceramic blade track to locate the one-piece annular ceramic runner relative to the annular metallic carrier, the cross-key connection including a plurality of keys and a plurality of corresponding keyways that receive the plurality of keys,
- wherein the plurality of keys extend in an axial direction from the one-piece annular ceramic runner parallel to the central axis without extending radially outward from the surface and the plurality of corresponding keyways that are formed in the annular metallic carrier.
A turbine shroud for use in a gas turbine engine having a central axis, the turbine shroud comprising
- an annular metallic carrier,
- a one-piece annular ceramic runner concentric with the annular metallic carrier that extends around the central axis,
- a cross-key connection formed between the annular metallic carrier and the one-piece annular ceramic blade track to locate the one-piece annular ceramic runner relative to the annular metallic carrier, the cross-key connection including a plurality of keys and a plurality of corresponding keyways that receive the plurality of keys, and
- a plurality of insulator tabs that extend in an axial direction from the one-piece annular ceramic runner parallel to the central axis circumferentially between the plurality of keys and radially inward of a portion of the annular metallic carrier so that the plurality of insulator tabs insulate at least some of the annular metallic carrier from hot gasses during use of the turbine shroud within a gas turbine engine,
- wherein the plurality of keys extend in the axial direction from the one-piece annular ceramic runner parallel to the central axis and the plurality of corresponding keyways that are formed in the annular metallic carrier.
A blade track for a gas turbine engine, the blade track comprising
- a one-piece annular ceramic runner that extends around a central axis and that comprises ceramic matrix material and ceramic-containing reinforcements suspended in the ceramic matrix material, the one-piece annular ceramic runner having a surface that faces radially outward away from the central axis, and
- a plurality of keys that extend in an axial direction from the one-piece annular ceramic runner parallel to the central axis without extending radially outward from the surface.
A blade track for a gas turbine engine, the blade track comprising
- a one-piece annular ceramic runner that extends around a central axis and that comprises ceramic matrix material and ceramic-containing reinforcements suspended in the ceramic matrix material,
- a plurality of keys that extend in an axial direction from the one-piece annular ceramic runner parallel to the central axis, and
- a plurality of insulator tabs that extend in an axial direction from the one-piece annular ceramic runner parallel to the central axis circumferentially between the plurality of keys.
A method of locating a ceramic blade track having a surface that faces radially outward away from a central axis relative to a metallic carrier, the method comprising
- rotating the ceramic blade track to a predetermined orientation relative to the metallic carrier,
- nesting the ceramic blade track in a space formed by the metallic carrier so that the ceramic blade track is concentric with the metallic carrier, and
- inserting a plurality of keys extending in an axial direction from the ceramic blade track without extending radially outward from the surface into a corresponding plurality of keyways formed in the metallic carrier to thereby establish a cross-key connection between the ceramic blade track and the metallic carrier.
Dependencies are inferred from the claim text.