# US 2016/0251982 A1 · Method and system for a ceramic matrix composite shroud hanger assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0251982 A1 - Document ID: US20160251982A1 - Status: Published application - Kind: A1 - Application number: 14/634,060 - Filed: 2015-02-27 - Published: 2016-09-01 - Earliest claimed: 2015-02-27 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Jason David Shapiro - Web page: https://patentgrep.com/patent/US20160251982A1 ## CPC - F01D 11/08: for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F01D5/20) - F01D 25/246: {Fastening of diaphragms or stator-rings} - F05D 2220/32: in gas turbines - F05D 2240/14: Casings or housings protecting or supporting assemblies within - F05D 2260/15: Load balancing - F05D 2260/941: particularly aimed at mechanical or thermal stress reduction - F05D 2300/6033: Ceramic matrix composites [CMC] - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A shroud and hanger assembly for a gas turbine engine and a method of transferring load from a ceramic matrix composite (CMC) shroud to a CMC shroud hanger assembly are provided. The shroud and hanger assembly includes a shroud hanger assembly formed of a first material having a first coefficient of thermal expansion, the shroud hanger assembly having a forward hanger portion and a separate aftward hanger portion and a shroud formed of a second material having a second coefficient of thermal expansion, the forward and aftward hanger portions configured to couple together to clamp across a forward radially extending wall of the shroud. ## Claims ### Claim 1 A shroud and shroud hanger assembly for a gas turbine engine, said assembly comprising: a shroud hanger assembly formed of a first material having a first coefficient of thermal expansion, said shroud hanger assembly having a forward hanger portion and a separate aftward hanger portion; and a shroud formed of a second material having a second coefficient of thermal expansion, said forward and aftward hanger portions configured to couple together to clamp across a forward radially extending wall of said shroud. ### Claim 2 (depends on 1) The shroud and hanger assembly of claim 1, wherein said forward and aftward hanger portions are configured to couple together using a mechanical fastener connection. ### Claim 3 (depends on 1) The shroud and hanger assembly of claim 1, wherein said forward and aftward hanger portions are configured to couple together using a bolted connection. ### Claim 4 (depends on 1) The shroud and hanger assembly of claim 1, wherein the first coefficient of thermal expansion is equal to the second coefficient of thermal expansion. ### Claim 5 (depends on 1) The shroud and hanger assembly of claim 1, wherein the first and second materials are ceramic matrix composite materials. ### Claim 6 (depends on 1) The shroud and hanger assembly of claim 1, wherein said shroud is supported radially by a pin extending thorough radially outwardly extending walls of said shroud and extending through radially inwardly extending legs of said aftward hanger portion. ### Claim 7 (depends on 1) The shroud and hanger assembly of claim 1, wherein said shroud hanger assembly includes an axial web member extending axially between a forward radially extending leg and an aftward radially extending leg of said aftward hanger portion. ### Claim 8 (depends on 1) The shroud and hanger assembly of claim 1, wherein said shroud hanger assembly includes a diagonal web member that extends from a radially inner end of a forward radially extending leg to a radially outer end of an aftward radially extending leg of said aftward hanger portion. ### Claim 9 (depends on 1) The shroud and hanger assembly of claim 1, wherein said aftward hanger portion is supported radially by a first tab extending axially from a radially outer end of a forward leg of said aftward hanger portion and a second tab extending axially from a radially outer end of an aftward leg of said aftward hanger portion, said first and said second tabs configured to engage circumferential lips of a casing surrounding said shroud and hanger assembly. ### Claim 10 A method of transferring load from a ceramic matrix composite (CMC) shroud to a CMC shroud hanger assembly, said method comprising: clamping a forward hanger portion and a separate aftward hanger portion of a shroud hanger assembly together, a forward radially extending wall of the shroud positioned between the forward hanger portion and the aftward hanger portion, the forward radially extending wall receiving a clamping force on a forward side from the forward hanger portion and on an aftward side from the aftward hanger portion providing a load transfer joint between the shroud and the shroud hanger assembly; coupling the shroud hanger assembly to a casing of a turbine; and transferring load from a nozzle through a diagonal web member of the shroud hanger assembly to the casing. ### Claim 11 (depends on 10) The method of claim 10, wherein clamping a forward hanger portion and a separate aftward hanger portion comprises clamping the forward radially extending wall between the forward hanger portion and the aftward hanger portion at the load transfer joint. ### Claim 12 A gas turbine engine comprising: a shroud hanger assembly formed of a first material having a first coefficient of thermal expansion, said shroud hanger assembly having a forward hanger portion and a separate aftward hanger portion; and a shroud formed of a second material having a second coefficient of thermal expansion, said forward and aftward hanger portions configured to couple together to clamp across a forward radially extending wall of said shroud. ### Claim 13 (depends on 12) The gas turbine engine of claim 12, wherein said forward and aftward hanger portions are configured to couple together using a mechanical fastener connection. ### Claim 14 (depends on 12) The gas turbine engine of claim 12, wherein said forward and aftward hanger portions are configured to couple together using a bolted connection. ### Claim 15 (depends on 12) The gas turbine engine of claim 12, wherein the first coefficient of thermal expansion is equal to the second coefficient of thermal expansion. ### Claim 16 (depends on 12) The gas turbine engine of claim 12, wherein the first and second materials are ceramic matrix composite materials. ### Claim 17 (depends on 12) The gas turbine engine of claim 12, wherein said shroud is supported radially by a pin extending thorough radially outwardly extending walls of said shroud and extending through radially inwardly extending legs of said aftward hanger portion. ### Claim 18 (depends on 12) The gas turbine engine of claim 12, wherein said shroud hanger assembly includes an axial web member extending axially between a forward radially extending leg and an aftward radially extending leg of said aftward hanger portion. ### Claim 19 (depends on 12) The gas turbine engine of claim 12, wherein said shroud hanger assembly includes a diagonal web member that extends from a radially inner end of a forward radially extending leg to a radially outer end of an aftward radially extending leg of said aftward hanger portion. ### Claim 20 (depends on 12) The gas turbine engine of claim 12, wherein said aftward hanger portion is supported radially by a first tab extending axially from a radially outer end of a forward leg of said aftward hanger portion and a second tab extending axially from a radially outer end of an aftward leg of said aftward hanger portion, said first and said second tabs configured to engage circumferential lips of a casing surrounding said shroud and hanger assembly.