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US 10,309,257 B2Granted
Turbine assembly with load pads
AssigneesRolls-Royce North American Technologies Inc., ROLLS-ROYCE plc
InventorsAaron D. Sippel, Ted J. Freeman, David J. Thomas, Richard C. Uskert, Peter J. Loftus, Andrew J. Lazur
Life of this patent
Estimating the term…
Abstract
A turbine shroud for a gas turbine engine includes a carrier and a blade track segment. The carrier is formed to include an inwardly opening blade track channel and the blade track segment is positioned in the blade track channel to couple the blade track segment with the carrier.
Claims14
A turbine shroud comprising
- a metallic carrier arranged around a central axis, the metallic carrier formed to include a radially-inwardly opening blade track channel defined by a fore-retainer surface, an aft-retainer surface spaced apart axially from the fore-retainer surface, and an intermediate surface extending between the fore and aft-retainer surfaces,
- a ceramic blade track segment including a runner and an attachment body extending radially outward away from the runner and positioned in the blade track channel to couple the ceramic blade track segment with the metallic carrier, the attachment body including a fore-attachment surface that faces the fore-retainer surface, an aft-attachment surface that faces the aft-retainer surface, and an outer surface that faces the intermediate surface, and
- a plurality of load pads positioned in the blade track channel radially inward of the outer surface included in the attachment body between the fore-retainer surface and the fore-attachment surface and between the aft-retainer surface and the aft-attachment surface to transmit loads between the metallic carrier and the ceramic blade track segment at predetermined locations on the fore and aft-attachment surfaces while allowing growth of the metallic carrier and the ceramic blade track segment at different rates during use of the turbine shroud,
- wherein each load pad includes an outer pad surface arranged to engage the metallic carrier, an inner pad surface spaced apart from the outer pad surface and arranged to engage the ceramic blade track segment, and at least two ramped surfaces that each extend away from the inner pad surface at an angle relative to the inner pad surface toward the outer pad surface.
1 more element
A turbine shroud comprising
- a metallic carrier arranged around a central axis, the metallic carrier formed to include a radially-inwardly opening blade track channel defined by a fore-retainer surface, an aft-retainer surface spaced apart axially from the fore-retainer surface, and an intermediate surface extending between the fore and aft-retainer surfaces,
- a ceramic blade track segment including a runner and an attachment body extending radially outward away from the runner and positioned in the blade track channel to couple the ceramic blade track segment with the metallic carrier, the attachment body including a fore-attachment surface that faces the fore-retainer surface, an aft-attachment surface that faces the aft-retainer surface, and an outer surface that faces the intermediate surface, and
- a plurality of load pads positioned in the blade track channel radially inward of the outer surface included in the attachment body between the fore-retainer surface and the fore-attachment surface and between the aft-retainer surface and the aft-attachment surface to transmit loads between the metallic carrier and the ceramic blade track segment at predetermined locations on the fore and aft-attachment surfaces while allowing growth of the metallic carrier and the ceramic blade track segment at different rates during use of the turbine shroud,
- wherein the fore-retainer surface or the aft-retainer surface of the metallic carrier is formed to include a pad recess that extends into one of the fore-retainer surface or the aft-retainer surface, and the pad recess receives a portion of a load pad of the plurality of load pads.
1 more element
A method of assembling a turbine shroud for use in an engine, the method comprising
- positioning load pads along a sidewall included in a blade track channel of a metallic carrier,
- moving an attachment body of a ceramic blade track segment relative to the metallic carrier and into the blade track channel to cause the load pads to engage the attachment body and transmit loads between the metallic carrier and the ceramic blade track segment through predetermined locations on the attachment body while allowing growth of the metallic carrier and the ceramic blade track segment at different rates during engine operation, and
- wherein the load pads include an outer pad surface engaged with the metallic carrier, an inner pad surface spaced apart from the outer pad surface and arranged to engage the ceramic blade track segment, and at least two ramped surfaces extending away from the inner pad surface toward the outer pad surface and the inner pad surface.
A method of assembling a turbine shroud for use in an engine, the method comprising
- positioning load pads along a sidewall included in a blade track channel of a metallic carrier,
- moving an attachment body of a ceramic blade track segment relative to the metallic carrier and into the blade track channel to cause the load pads to engage the attachment body and transmit loads between the metallic carrier and the ceramic blade track segment through predetermined locations on the attachment body while allowing growth of the metallic carrier and the ceramic blade track segment at different rates during engine operation, and
- wherein the metallic carrier includes a radially extending fore-retainer sidewall and a radially extending aft-retainer sidewall that is spaced apart axially from the fore-retainer sidewall, the aft-retainer sidewall is formed to include a first pad recess and a second pad recess spaced apart circumferentially from the first pad recess and the fore-retainer sidewall is formed to include a third pad recess located circumferentially about midway between the first and second pad recesses.
Dependencies are inferred from the claim text.