# US 2017/0254271 A1 · Intercomponent seal for a gas turbine engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0254271 A1 - Document ID: US20170254271A1 - Status: Published application - Kind: A1 - Application number: 15/442,025 - Filed: 2017-02-24 - Published: 2017-09-07 - Earliest claimed: 2016-03-01 - Assignees: ROLLS-ROYCE plc - Applicants: ROLLS-ROYCE plc - Inventors: Steven HILLIER - Web page: https://patentgrep.com/patent/US20170254271A1 ## CPC - F01D 11/005: {Sealing means between non relatively rotating elements} - F02C 7/28: Arrangement of seals - F01D 5/282: {Selecting composite materials, e.g. blades with reinforcing filaments} - F01D 11/008: {by spacer elements between the blades, e.g. independent interblade platforms} - F01D 25/24: Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) - F01D 5/284: {Selection of ceramic materials} - F05D 2220/32: in gas turbines - F05D 2240/11: Shroud seal segments - F05D 2240/55: Seals - F05D 2300/6033: Ceramic matrix composites [CMC] - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract This document discloses a wall arrangement for a gas turbine engine, comprising: an annular wall comprising a plurality of circumferential wall segments, adjacent wall segments having opposing first and second end wall portions which define a separating gap therebetween, the gap including a saddle portion which faces radially outwards and comprises a first sealing face on the first end wall portion and a second sealing face on the second end wall portion; and, a longitudinal seal member having a curved sealing surface located within the saddle portion, wherein the curved sealing surface contacts either or both first and second sealing faces along the length of the saddle portion in use, wherein the seal member includes one or more axial restraint features which engage with a corresponding feature of the wall segment or a supporting structure thereof. ## Claims ### Claim 1 A wall arrangement for a gas turbine engine, comprising: an annular wall comprising a plurality of circumferential wall segments, adjacent wall segments having opposing first and second end wall portions which define a separating gap therebetween, the gap including a saddle portion which faces radially outwards and comprises a first sealing face on the first end wall portion and a second sealing face on the second end wall portion; and, a longitudinal seal member having a curved sealing surface located within the saddle portion, wherein the curved sealing surface contacts either or both first and second sealing faces along the length of the saddle portion in use, wherein the seal member includes one or more axial restraint features which engage with a corresponding feature of the wall segment or a supporting structure thereof, wherein the axial restraint includes one or more transverse projection which extends from a main body of the seal member. ### Claim 2 (depends on 1) A wall arrangement as claimed in claim 1, in which the transverse projection includes an upstand which extends from a surface of the main body. ### Claim 3 (depends on 2) A wall arrangement as claimed in claim 2, wherein the transverse projection includes a flange located at an axially upstream end of the seal member. ### Claim 4 (depends on 3) A wall arrangement as claimed in claim 3, wherein the flange is eccentrically arranged relative to the main body such that the geometric centre of the flange is offset from the geometric centre of the seal member. ### Claim 5 (depends on 4) A wall arrangement as claimed in claim 4 in which the flange extends radially inboard of the main body. ### Claim 6 (depends on 5) A wall arrangement as claimed in claim 5, wherein the radially inner edge of the flange is concavely dished. ### Claim 7 (depends on 1) A wall arrangement as claimed in claim 1, wherein the wall segment or a supporting structure thereof includes one or more slots for receiving a seal element which extends towards the seal member. ### Claim 8 (depends on 7) A wall arrangement as claimed in claim 7, wherein the seal element is either or both of i) received within a recess seal member, or ii) abuts the transverse projection which extends from the seal member. ### Claim 9 (depends on 8) A wall arrangement as claimed in claim 8, wherein the wall arrangement includes one or more radially extending support walls which engage with the engine casing or an intermediate supporting structure, supporting walls include one or more of the slots for receiving the seal element. ### Claim 10 (depends on 9) A wall arrangement as claimed in claim 9, wherein one or more of the seal elements are inclined in a streamwise direction. ### Claim 11 (depends on 10) A wall arrangement as claimed in claim 10, wherein the one or more transverse projections includes a through passage which extends from an upstream side to a downstream side thereof. ### Claim 12 (depends on 11) A wall arrangement as claimed in claim 11, wherein the transverse projection includes a hooped wall which provides the through-passage. ### Claim 13 (depends on 1) A wall arrangement as claimed in claim 1, wherein the cross-sectional shape normal to the longitudinal axis of the seal member is predominantly round. ### Claim 14 (depends on 1) A wall arrangement as claimed in claim 1, wherein the cross-sectional shape normal to the longitudinal axis of the seal member includes at least one chordal portion.