# US 12,560,099 B2 · Turbine for turbomachine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,560,099 B2 - Document ID: US12560099B2 - Status: Granted - Kind: B2 - Application number: 19/211,604 - Filed: 2025-05-19 - Published: 2025-09-04 - Granted: 2026-02-24 - Earliest claimed: 2021-12-03 - Assignees: Safran Aircraft Engines - Applicants: Safran Aircraft Engines - Inventors: Anthony Pierre Beguin; Olivier Jean-Daniel Baumas; Nicolas Daniel Delaporte - Web page: https://patentgrep.com/patent/US12560099B2 ## CPC - F01D 9/065: {Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids (see also F01D25/16, F01D25/24 and F01D25/26)} - F01D 25/14: Casings modified therefor (double casings F01D25/26) - F01D 9/041: {using blades (F01D5/148 takes precedence)} - F01D 25/243: {Flange connections; Bolting arrangements (F01D25/265 takes precedence)} - F01D 25/246: {Fastening of diaphragms or stator-rings} - F05D 2240/12: Fluid guiding means, e.g. vanes - F05D 2240/14: Casings or housings protecting or supporting assemblies within - F05D 2240/80: Platforms for stationary or moving blades - F05D 2240/81: Cooled platforms - F05D 2260/205: Cooling fluid recirculation, i.e. after cooling one or more components is the cooling fluid recovered and used elsewhere for other purposes - 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 ## Abstract An assembly for a turbomachine of longitudinal axis includes a nozzle carried by an annular part which is fixed to an outer casing. The nozzle has an outer annular platform from which extends, radially outwards, a radial annular wall which carries an annular attachment tab extending longitudinally upstream from the radial annular wall. The assembly has a cooling circuit with an inner annular chamber delimited radially by the outer annular platform and the annular part and delimited downstream by the radial annular wall. An intermediate annular chamber is formed radially externally to the annular attachment tab and in fluid communication with the outer casing. Means of fluid communication between the inner annular chamber and the intermediate annular chamber is formed in the annular attachment tab of the nozzle. ## Claims ### Claim 1 An assembly for a turbomachine of longitudinal axis, the assembly comprising a nozzle carried by an annular part which is fixed to an outer casing surrounding an annular row of moving blades arranged downstream of the nozzle, the nozzle comprising an outer annular platform from which a radial annular wall extends radially outwards, the annular part comprising a first wall extending in a direction comprising at least one radial component and an outer cylindrical wall extending longitudinally downstream from the first wall, the assembly further comprising a cooling circuit which comprises an intermediate annular chamber and an outer annular chamber each delimited longitudinally between the first wall of the annular part and the radial annular wall of the nozzle, the outer annular chamber being formed radially externally to the intermediate annular chamber, the outer cylindrical wall forming a partition radially between the outer annular chamber and the intermediate annular chamber, the outer annular chamber being further delimited, radially externally, by the outer casing, the cooling circuit comprising means of fluid communication between the intermediate annular chamber and the outer annular chamber, the outer cylindrical wall of the annular part resting, in the longitudinal direction, against an upstream face of the radial annular wall of the nozzle, the means of fluid communication between the intermediate annular chamber and the outer annular chamber comprising a plurality of upstream grooves of a first type formed on the upstream face of the radial annular wall, each upstream groove of the first type extending radially from an inner annular portion of the upstream face of the radial annular wall which delimits the intermediate annular chamber, to an outer annular portion of the upstream face of the radial annular wall which delimits the outer annular chamber. ### Claim 2 (depends on 1) The assembly according to claim 1, wherein each upstream groove of the first type lead radially outwards to a radially outer end of the radial annular wall. ### Claim 3 (depends on 1) The assembly according to claim 1, wherein each upstream groove of the first type have a rounded bottom. ### Claim 4 (depends on 1) The assembly according to claim 1, wherein the annular row of moving blades is surrounded by a ring carried by the outer casing, the ring being fixed, upstream, to the outer casing by means of an annular tab resting radially against a cylindrical rail of the outer casing, the annular tab and the cylindrical rail being held together by an annular attachment member, the cooling circuit comprising a downstream annular chamber delimited radially between the ring and the annular attachment member and delimited longitudinally between the radial annular wall of the nozzle and the annular tab of the ring, and means of fluid communication between the intermediate annular chamber and the downstream annular chamber. ### Claim 5 (depends on 4) The assembly according to claim 4, wherein the means of fluid communication between the intermediate annular chamber and the downstream annular chamber comprise indirect means of fluid communication between the intermediate annular chamber and the downstream annular chamber, via the outer annular chamber, the indirect means of fluid communication between the intermediate annular chamber and the downstream annular chamber comprising the means of fluid communication between the intermediate annular chamber and the outer annular chamber. ### Claim 6 (depends on 5) The assembly according to claim 5, wherein the indirect means of fluid communication between the intermediate annular chamber and the downstream annular chamber comprise means of fluid communication between the outer annular chamber and the downstream annular chamber. ### Claim 7 (depends on 6) The assembly according to claim 6, wherein the means of fluid communication between the outer annular chamber and the downstream annular chamber comprise a first radial clearance formed between a radially outer end of the radial annular wall of the nozzle and the outer casing. ### Claim 8 (depends on 6) The assembly according to claim 6, wherein the annular attachment member rests, in the longitudinal direction, against an intermediate annular portion of a downstream face of the radial annular wall of the nozzle, the means of fluid communication between the outer annular chamber and the downstream annular chamber comprising a plurality of downstream grooves of a first type formed on the downstream face of the radial annular wall, each downstream groove of the first type extending radially from an inner annular portion of the downstream face of the radial annular wall which delimits the downstream annular chamber to an outer annular portion of the downstream face of the radial annular wall which is located radially externally to the intermediate annular portion of the downstream face of the radial annular wall. ### Claim 9 (depends on 8) The assembly according to claim 8, wherein each downstream groove of the first type extends rectilinearly in a radial direction. ### Claim 10 (depends on 4) The assembly according to claim 4, wherein the means of fluid communication between the intermediate annular chamber and the downstream annular chamber comprise direct means of fluid communication between the intermediate annular chamber and the downstream annular chamber. ### Claim 11 (depends on 10) The assembly according to claim 10, wherein the radial annular wall of the nozzle comprises a plurality of notches distributed circumferentially around the longitudinal axis and open radially outwards at a radially outer end of the radial annular wall, in which are engaged parts projecting from the outer cylindrical wall of the annular part, the direct means of fluid communication between the intermediate annular chamber and the downstream annular chamber comprising a second radial clearance formed between a bottom face of each notch and the corresponding part projecting from the annular part. ### Claim 12 (depends on 11) The assembly according to claim 11, wherein the annular attachment member rests, in the longitudinal direction, against an intermediate annular portion of a downstream face of the radial annular wall of the nozzle, the means of fluid communication between the outer annular chamber and the downstream annular chamber comprising a plurality of downstream grooves of a first type formed on the downstream face of the radial annular wall, each downstream groove of the first type extending radially from an inner annular portion of the downstream face of the radial annular wall which delimits the downstream annular chamber to an outer annular portion of the downstream face of the radial annular wall which is located radially externally to the intermediate annular portion of the downstream face of the radial annular wall, and wherein the direct means of fluid communication between the intermediate annular chamber and the downstream annular chamber comprise a plurality of downstream grooves of a second type formed on the downstream face of the radial annular wall, each downstream groove of the second type extending radially from the inner annular portion of the downstream face of the radial annular wall and leading radially outwards to one of the notches. ### Claim 13 (depends on 12) The assembly according to claim 12, wherein each downstream groove of the second type have a rounded bottom. ### Claim 14 (depends on 11) The assembly according to claim 11, wherein the outer cylindrical wall of the annular part rests, in the longitudinal direction, against an upstream face of the radial annular wall of the nozzle, the means of fluid communication between the intermediate annular chamber and the outer annular chamber comprising a plurality of upstream grooves of a first type formed on the upstream face of the radial annular wall, each upstream groove of the first type extending radially from an inner annular portion of the upstream face of the radial annular wall which delimits the intermediate annular chamber, to an outer annular portion of the upstream face of the radial annular wall which delimits the outer annular chamber, and wherein the annular attachment member rests, in the longitudinal direction, against an intermediate annular portion of a downstream face of the radial annular wall of the nozzle, the means of fluid communication between the outer annular chamber and the downstream annular chamber comprising a plurality of downstream grooves of a first type formed on the downstream face of the radial annular wall, each downstream groove of the first type extending radially from an inner annular portion of the downstream face of the radial annular wall which delimits the downstream annular chamber to an outer annular portion of the downstream face of the radial annular wall which is located radially externally to the intermediate annular portion of the downstream face of the radial annular wall, and wherein each upstream groove of the first type and each downstream groove of the first type is respectively located on the upstream face and the downstream face of the radial annular wall of the nozzle, circumferentially between two circumferentially consecutive notches. ### Claim 15 (depends on 1) The assembly according to claim 1, comprising an annular seal housed in the intermediate annular chamber, the annular seal resting longitudinally against the first wall of the annular part and the radial annular wall of the nozzle, each upstream groove of the first type extending radially inwards to a first part of the inner annular portion of the upstream face of the radial annular wall, the first part of the inner annular portion delimiting a zone of the intermediate annular chamber located radially internally to the annular seal. ### Claim 16 (depends on 15) The assembly according to claim 15, wherein the cooling circuit comprises a plurality of upstream grooves of a second type formed on the upstream face of the radial annular wall, each upstream groove of the second type extending radially from the first part of the inner annular portion of the upstream face of the radial annular wall to a second part of the inner annular portion of the upstream face of the radial annular wall, the second part of the inner annular portion delimiting a zone of the intermediate annular chamber located radially externally to the annular seal. ### Claim 17 An assembly for a turbomachine of longitudinal axis, the assembly comprising a nozzle carried by an annular part which is fixed to an outer casing surrounding an annular row of moving blades arranged downstream of the nozzle, the nozzle comprising an outer annular platform from which a radial annular wall extends radially outwards, the annular part comprising a first wall extending in a direction comprising at least one radial component and an outer cylindrical wall extending longitudinally downstream from the first wall, the assembly further comprising a cooling circuit which comprises an intermediate annular chamber and an outer annular chamber each delimited longitudinally between the first wall of the annular part and the radial annular wall of the nozzle, the outer annular chamber being formed radially externally to the intermediate annular chamber, the outer cylindrical wall forming a partition radially between the outer annular chamber and the intermediate annular chamber, the outer annular chamber being further delimited, radially externally, by the outer casing, the cooling circuit comprising means of fluid communication between the intermediate annular chamber and the outer annular chamber, wherein the outer casing comprises a radial annular flange to which the annular part is fixed, the outer annular chamber being delimited radially externally, in whole or in part, by a radially inner end of the radial annular flange of the outer casing.