# US 11,441,516 B2 · Centrifugal compressor assembly for a gas turbine engine with deswirler having sealing features > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,516 B2 - Document ID: US11441516B2 - Status: Granted - Kind: B2 - Application number: 16/928,586 - Filed: 2020-07-14 - Published: 2022-01-20 - Granted: 2022-09-13 - Earliest claimed: 2020-07-14 - Assignees: Rolls-Royce North American Technologies Inc. - Applicants: Rolls-Royce North American Technologies Inc. - Inventors: Ryan Humes - Web page: https://patentgrep.com/patent/US11441516B2 ## CPC - F01D 25/30: Exhaust heads, chambers, or the like - F02K 3/025: {the by-pass flow being at least partly used to create an independent thrust component} - F01D 5/00: Blades; Blade-carrying members (nozzle boxes F01D9/02); Heating, heat-insulating, cooling or antivibration means on the blades or the members {(special arrangements in rotors dealing with breaking off of part thereof F01D21/045)} - F01D 11/003: {by packing rings; Mechanical seals} - F01D 15/00: Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby - 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 25/243: {Flange connections; Bolting arrangements (F01D25/265 takes precedence)} - F02C 7/18: the medium being gaseous, e.g. air {(F02C7/125 takes precedence)} - F04D 1/00: Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00) - F04D 17/10: for compressing or evacuating - F04D 29/083: {especially adapted for elastic fluid pumps} - F04D 29/44: Fluid-guiding means, e.g. diffusers - F04D 29/444: {Bladed diffusers} - F04D 29/624: {especially adapted for elastic fluid pumps} - F05D 2220/36: specially adapted for the fan of turbofan engines - F05D 2240/14: Casings or housings protecting or supporting assemblies within - F05D 2240/55: Seals - F05D 2260/38: by a spring, i.e. spring loaded or biased towards a certain position - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00) - 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) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A compressor adapted for use in for a gas turbine engine includes a diffuser and a housing. The diffuser is arranged circumferentially around an axis and includes a fore plate, an aft plate spaced apart axially from the fore plate to define a flow path therebetween, and a plurality of vanes that extend between the fore plate and the aft plate. The housing is arranged circumferentially about the axis and located adjacent the diffuser. ## Claims ### Claim 1 A compressor adapted for use in for a gas turbine engine, the compressor comprising an impeller configured to rotate about an axis to provide compressed air, a diffuser arranged circumferentially around the impeller and configured to diffuse the compressed air received from the impeller, the diffuser including a diffuser body aligned axially with an outlet of the impeller to capture the compressed air and a locating baffle fixed with the diffuser body for movement with the diffuser body, the diffuser body includes a fore plate, an aft plate spaced apart axially from the fore plate to define a flow path configured to receive the compressed air from the impeller, and a plurality of vanes that extend between the fore plate and the aft plate to interact with the compressed air flowing through the diffuser body, a housing arranged circumferentially about the axis and located adjacent the diffuser, wherein the locating baffle is engaged with a first portion of the housing and urges the diffuser body away from the first portion of the housing and toward a second portion of the housing and the locating baffle is configured to deform elastically to allow the diffuser body to move relative to the first portion of the housing and the second portion of the housing during use of the compressor, wherein the diffuser further includes a seal engaged with the diffuser body and the second portion of the housing. ### Claim 2 (depends on 1) The compressor of claim 1, wherein the locating baffle comprises sheet metal arranged to form a diaphragm spring feature configured to deform elastically to allow the diffuser body to move relative to the first portion of the housing and the second portion of the housing during use of the compressor. ### Claim 3 (depends on 2) The compressor of claim 2, wherein the locating baffle is coupled with the first portion of the housing for movement with the first portion of the housing and movement of the locating baffle is physically limited axially and radially by the housing. ### Claim 4 (depends on 2) The compressor of claim 2, wherein movement of the diffuser body is limited axially, radially, and circumferentially by the housing without the diffuser being coupled directly rigidly with the housing so that force loads acting on the housing are not transmitted to the diffuser. ### Claim 5 (depends on 1) The compressor of claim 1, wherein the first portion of the housing comprises an outer case arranged circumferentially around the impeller and the second portion of the housing comprises at least one of a radially extending inner combustor case adapted to define a portion of a combustion chamber and a shroud arranged around the impeller. ### Claim 6 (depends on 5) The compressor of claim 5, wherein the locating baffle is fixed to a radial outer end of the diffuser body, extends forward away from the diffuser body and is fastened with the outer case. ### Claim 7 (depends on 1) The compressor of claim 1, wherein the locating baffle is annular and solid to form a gas seal between the diffuser body and the first portion of the housing. ### Claim 8 A compressor adapted for use in for a gas turbine engine, the compressor comprising a diffuser arranged circumferentially around an axis, the diffuser including a diffuser body and a locating baffle, the diffuser body includes a fore plate, an aft plate spaced apart axially from the fore plate to define a flow path, and a plurality of vanes that extend between the fore plate and the aft plate, and a housing arranged circumferentially about the axis and located adjacent the diffuser, wherein the locating baffle is configured to deform elastically to allow the diffuser body to move relative to the housing and is engaged with a first portion of the housing to bias the diffuser body away from the first portion of the housing and toward a second portion of the housing, wherein movement of the diffuser is limited axially and radially by the housing without the diffuser being coupled rigidly with the housing or any other component. ### Claim 9 (depends on 8) The compressor of claim 8, wherein the locating baffle includes a curved portion that defines a diaphragm configured to deform elastically. ### Claim 10 (depends on 9) The compressor of claim 9, wherein at least the curved portion of the locating baffle comprises sheet metal. ### Claim 11 (depends on 8) The compressor of claim 8, wherein the locating baffle is coupled with the first portion of the housing for movement with the first portion of the housing. ### Claim 12 (depends on 11) The compressor of claim 11, wherein the first portion of the housing includes fore outer case and an aft outer case and the locating baffle is fastened between the fore outer case and the aft outer case. ### Claim 13 (depends on 8) The compressor of claim 8, wherein the first portion of the housing comprises an outer case arranged circumferentially around the impeller and the second portion of the housing comprises at least one of a radially extending inner combustor case adapted to define a portion of a combustion chamber and a shroud arranged around the impeller. ### Claim 14 A method comprising providing an impeller configured to rotate about an axis to provide compressed air, a diffuser configured to diffuse the compressed air received from the impeller, and a housing, the diffuser including a diffuser body and a locating baffle configured to deform elastically, fixing a first end of the locating baffle to the diffuser body for movement with the diffuser body, arranging the diffuser circumferentially around the impeller so that the diffuser body is aligned axially with an outlet of the impeller, arranging the housing adjacent to the diffuser, and engaging a second end of the locating baffle with a first portion of the housing to bias the diffuser body away from the first portion of the housing and toward a second portion of the housing, wherein the locating baffle is fixed to a radial outer end of the diffuser body, extends forward away from the diffuser body, and is fastened with the first portion of the housing.