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US 11,111,796 B1Granted
Turbine shroud assembly with dovetail retention system
AssigneesRolls-Royce North American Technologies Inc., ROLLS-ROYCE plc
InventorsTed J. Freeman, Aaron D. Sippel, Alexandra Baucco, Anthony Razzell, Michael J. Whittle, Jeffrey Crutchfield
Life of this patent
Estimating the term…
Abstract
A turbine shroud assembly for use with a gas turbine engine includes a turbine outer case, a blade track segment, and a carrier assembly. The turbine outer case is arranged around an axis. The blade track segment is configured to define a portion of a gas path of the gas turbine engine. The carrier assembly is coupled to the turbine outer case and supports the blade track segment.
Claims20
A turbine shroud assembly for use with a gas turbine engine, the turbine shroud assembly comprising
- a turbine outer case including an outer wall that extends circumferentially about an axis and a mount flange that extends radially away from the outer wall,
- a connection flange that extends radially inward relative to the outer wall,
- a blade track segment made of ceramic matrix composite materials, the blade track segment including an arcuate runner that extends circumferentially partway around the axis and an attachment feature that extends radially outward from the runner, the attachment feature includes radially inward facing angled load surfaces and a radially outward facing locating surface, and
- a carrier assembly made of metallic material and arranged circumferentially partway around the axis, the carrier assembly comprising a forward carrier segment and an aft carrier segment, the forward carrier segment including a forward radially extending flange that couples with the connection flange and a forward load carrying portion that extends axially aft from an inner end of the forward extending flange and engages with a first of the angled load surfaces of the blade track segment, the aft carrier segment including a carrier mount that couples with the connection flange, an aft flange that extends radially inward, and an aft load carrying portion that extends axially forward from an inner end of the aft flange and engages with a second of the angled load surfaces of the blade track segment,
- wherein the forward carrier segment and aft carrier segment are pressed axially towards each other causing forward and aft load carrying portions to push the angled load surfaces radially outward resulting in the blade track segment being located relative to the carrier assembly.
2 more elements
A turbine shroud assembly for use with a gas turbine engine, the turbine shroud assembly comprising
- a turbine outer case having an outer wall arranged around an axis,
- a connection flange coupled for movement with the outer wall and extending radially inward relative to the outer wall,
- a blade track segment including an arcuate runner that extends circumferentially partway around the axis and an attachment feature that extends radially outward from the runner, the attachment feature includes a first radially inward facing angled load surface and a second radially inward facing angled load surface such that the first and second radially inward facing angled load surfaces converge toward each other, and
- a carrier assembly arranged circumferentially partway around the axis, the carrier assembly comprising a forward carrier segment and an aft carrier segment coupled with the connection flange for movement therewith, the forward carrier segment engages the first radially inward facing angled load surface and the aft carrier segment engages the second radially inward facing angled load surface so that the carrier assembly supports the blade track segment radially relative to the axis, and the forward carrier segment and the aft carrier segment are clamped together in compression so that the blade track segment does not move radially relative to the axis in response to thermal growth of the turbine shroud assembly.
1 more element
A method comprising
- providing a turbine outer case having an outer wall arranged around an axis, a connection flange coupled with the outer wall of the turbine outer case, a blade track segment having an arcuate runner and an attachment feature that extends radially outward away from the arcuate runner, and a carrier assembly comprising a first carrier segment and a second carrier segment,
- aligning the connection flange with the first and second carrier segments,
- aligning the attachment feature of the blade track segment with the first carrier segment and the second carrier segment,
- moving the first carrier segment and the second carrier segment relative to each other to trap the attachment feature between the first carrier segment and the second carrier segment so that load carrying portions included in the first carrier segment and the second carrier segment engage radially inward facing and angled load surfaces of the attachment feature and move the radially inward facing and angled load surfaces radially outward, and
- coupling the first carrier segment and the second carrier segment with the connection flange.
2 more elements
Dependencies are inferred from the claim text.