# US 11,441,448 B2 · Impingement cooled rotating seal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,448 B2 - Document ID: US11441448B2 - Status: Granted - Kind: B2 - Application number: 16/789,977 - Filed: 2020-02-13 - Published: 2021-08-19 - Granted: 2022-09-13 - Earliest claimed: 2020-02-13 - Assignees: Raytheon Technologies Corporation - Applicants: United Technologies Corporation - Inventors: Sin Chien Siw; Timothy Castaldo; Charles Joseph Banas; Jorn Axel Glahn - Web page: https://patentgrep.com/patent/US11441448B2 ## CPC - F01D 25/12: Cooling - B29C 64/10: Processes of additive manufacturing - B33Y 10/00: Processes of additive manufacturing - F01D 11/001: {for sealing space between stator blade and rotor} - F01D 11/003: {by packing rings; Mechanical seals} - F01D 25/183: {Sealing means} - F04D 29/122: {especially adapted for elastic fluid pumps} - F16J 15/162: {Special parts or details relating to lubrication or cooling of the sealing itself (F16J15/324, F16J15/3404, F16J15/40 take precedence)} - F16J 15/3404: {and characterised by parts or details relating to lubrication, cooling or venting of the seal} - F05D 2220/32: in gas turbines - F05D 2230/31: Layer deposition - F05D 2240/55: Seals - F05D 2260/20: Heat transfer, e.g. cooling - F05D 2260/201: by impingement of a fluid - F05D 2260/2212: by creating turbulence - 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) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - 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 rotating seal rotatable about a rotational axis is provided. The rotating seal includes a body having a first surface disposable to face the rotational axis and a second surface disposable to contact with a stationary element. The body defines a cooling channel including one or more entrance channels respectively extending from the first surface, one or more exit channels and a plenum. The plenum extends circumferentially through the body and has a hot side adjacent to the second surface. The plenum is fluidly interposed between the one or more entrance channels and the one or more exit channels whereby fluid exiting the one or more entrance channels and entering the plenum impinges against the hot side. ## Claims ### Claim 1 A rotating seal rotatable about a rotational axis and comprising: a body having a first surface disposable to face the rotational axis and a second surface disposable to contact with a stationary element, the body defining a cooling channel comprising: one or more entrance channels respectively extending from the first surface; one or more exit channels; and a plenum extending circumferentially through the body and having a hot side adjacent to the second surface, the plenum being fluidly interposed between the one or more entrance channels and the one or more exit channels whereby fluid exiting the one or more entrance channels and entering the plenum impinges against the hot side and subsequently exits the plenum by moving away from the hot side and the second surface through the exit channels, wherein the one or more entrance channels are oriented along a radial dimension relative to the rotational axis with angling toward the hot side and the second surface and the one or more exit channels are angled relative to the radial dimension and are directed reversely with respect to a component of the angling of the one or more entrance channels. ### Claim 2 (depends on 1) The rotating seal according to claim 1, wherein the first surface comprises an axial surface disposable to face radially inwardly toward the rotational axis and the second surface is disposable to face axially toward the stationary element. ### Claim 3 (depends on 1) The rotating seal according to claim 1, wherein the one or more entrance channels and the one or more exit channels have circular cross-sections. ### Claim 4 (depends on 1) The rotating seal according to claim 1, wherein the plenum has a racetrack-shaped cross-section and a larger cross-sectional area than the one or more entrance channels and the one or more exit channels. ### Claim 5 (depends on 1) The rotating seal according to claim 1, wherein the plenum comprises a protrusion surface portion that protrudes toward the one or more entrance channels. ### Claim 6 (depends on 1) The rotating seal according to claim 1, wherein the one or more entrance channels have flared outlets. ### Claim 7 A rotating seal rotatable about a rotational axis and comprising: a body having a first surface disposable to face the rotational axis and a second surface disposable to contact with a stationary element, the body defining a cooling channel comprising: one or more entrance channels respectively extending from the first surface; one or more exit channels; and a plenum extending circumferentially through the body and having a hot side adjacent to the second surface, the plenum being fluidly interposed between the one or more entrance channels and the one or more exit channels whereby fluid exiting the one or more entrance channels and entering the plenum impinges against the hot side and subsequently exits the plenum by moving away from the hot side and the second surface through the exit channels, wherein the one or more entrance channels are angled at about ˜30-60 degrees from the rotational axis toward the hot side and the second surface. ### Claim 8 A turbine section of a gas turbine engine having an engine centerline, the turbine section comprising: stationary and rotating seals, which are stationary and rotatable relative to the engine centerline, respectively, the rotating seal comprising: a body having a first surface disposable to face the engine centerline and a second surface disposable to contact with the stationary element, the body defining a cooling channel comprising: one or more entrance channels respectively extending from the first surface; one or more exit channels; and a plenum extending circumferentially through the body and having a hot side adjacent to the second surface, the plenum being fluidly interposed between the one or more entrance channels and the one or more exit channels whereby fluid exiting the one or more entrance channels and entering the plenum flows along outer surfaces of the one or more entrance channels and impinges against the hot side and subsequently exits the plenum by moving away from the hot side and the second surface through the exit channels, wherein the one or more entrance channels are oriented along a radial dimension relative to the engine centerline with angling toward the hot side and the second surface and the one or more exit channels are angled relative to the radial dimension and are directed reversely with respect to a component of the angling of the one or more entrance channels. ### Claim 9 (depends on 8) The turbine section according to claim 8, wherein: the stationary and rotating seals face in the forward and aft directions, respectively, or the stationary and rotating seals face in the aft and forward directions, respectively, and the first surface comprises an axial surface disposable to face radially inwardly toward the engine centerline and the second surface is disposable to face axially toward the stationary element. ### Claim 10 (depends on 8) The turbine section according to claim 8, wherein the one or more entrance channels and the one or more exit channels have circular cross-sections. ### Claim 11 (depends on 8) The turbine section according to claim 8, wherein the one or more entrance channels are angled at about ˜30-60 degrees from the engine centerline toward the hot side and the second surface. ### Claim 12 (depends on 8) The turbine section according to claim 8, wherein the plenum has a racetrack-shaped cross-section and a larger cross-sectional area than the one or more entrance channels and the one or more exit channels. ### Claim 13 (depends on 8) The turbine section according to claim 8, wherein the plenum comprises a protrusion surface portion that protrudes toward the one or more entrance channels. ### Claim 14 (depends on 8) The turbine section according to claim 8, wherein the one or more entrance channels have flared outlets.