# US 10,865,988 B2 · Plate for supporting nozzle tubes and method of assembling the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,988 B2 - Document ID: US10865988B2 - Status: Granted - Kind: B2 - Application number: 16/110,707 - Filed: 2018-08-23 - Published: 2019-03-07 - Granted: 2020-12-15 - Earliest claimed: 2017-09-06 - Assignees: Doosan Heavy Industries Construction Co., Ltd - Applicants: Doosan Heavy Industries & Construction Co., Ltd. - Inventors: Byeong Ha Jeon; Moon Soo Cho - Web page: https://patentgrep.com/patent/US10865988B2 ## CPC - F23R 3/283: {Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances} - F23R 3/60: Support structures; Attaching or mounting means - F05D 2220/32: in gas turbines - F05D 2230/64: using positioning or alignment devices for aligning or centring, e.g. pins - F05D 2270/42: passive or reactive, e.g. using large wind vanes - F23R 2900/00014: Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators - F23R: GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures F23C10/16) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A plate for supporting a plurality of nozzle tubes in a combustion casing of a combustor stably supports the nozzle tubes and adsorbs displacement due to thermal expansion or natural vibrations, thereby reducing combustor maintenance and extending the lifetime of the combustor. The plate includes an inner frame having a plurality of through holes for respectively receiving the plurality of nozzle tubes; a fixing frame fixed on an inner circumferential surface of the combustion casing and configured to support the inner frame; and a mechanical buffer disposed between the fixing frame and the inner frame. The fixing frame has an inner circumferential surface in which a fixing recess having a U-shaped cross-section is formed to receive the mechanical buffer and an outer edge of the inner frame and to receive the mechanical buffer. A method of assembly the nozzle tube support plate facilitates its initial installation and subsequent maintenance. ## Claims ### Claim 1 A plate for supporting a plurality of nozzle tubes in a combustion casing of a combustor of a gas turbine, the plate comprising: an inner frame having a plurality of through holes for respectively receiving the plurality of nozzle tubes; a fixing frame fixed on an inner circumferential surface of the combustion casing and configured to support the inner frame, the fixing frame having an inner circumferential surface in which a fixing recess is formed, the fixing recess having a U-shaped cross-section and being configured to receive an outer edge of the inner frame in order to support the inner frame; and a mechanical buffer disposed between the fixing frame and the inner frame. ### Claim 2 (depends on 1) The plate according to claim 1, the fixing recess is further configured to receive the mechanical buffer on an inner surface of the fixing recess. ### Claim 3 (depends on 2) The plate according to claim 2, wherein the mechanical buffer comprises: a radial buffer configured to absorb a radial displacement of the inner frame with respect to the fixing frame; and an axial buffer configured to absorb an axial displacement of the inner frame with respect to the fixing frame. ### Claim 4 (depends on 3) The plate according to claim 3, wherein the radial buffer comprises a ball spring inserted into the fixing recess between the inner frame and a first inner surface of the fixing frame. ### Claim 5 (depends on 3) The plate according to claim 3, wherein the axial buffer comprises a ball spring inserted into the fixing recess between the inner frame and a second inner surface of the fixing frame. ### Claim 6 (depends on 1) The plate according to claim 1, further comprising insert pieces formed at regular intervals on the outer edge of the inner frame and configured to be respectively inserted into the fixing recess. ### Claim 7 (depends on 6) The plate according to claim 6, wherein the inner circumferential surface of the fixing frame includes auxiliary fixing recesses formed to correspond to the insert pieces of the inner frame, and the auxiliary fixing recesses are configured to respectively receive an axial insertion of the insert pieces. ### Claim 8 A combustor for a gas turbine, the combustor comprising: a plurality of nozzle tubes supported in a combustion casing; an inner frame having a plurality of through holes for respectively receiving the plurality of nozzle tubes; a fixing frame fixed on an inner circumferential surface of the combustion casing and configured to support the inner frame, the fixing frame having an inner circumferential surface in which a fixing recess is formed, the fixing recess having a U-shaped cross-section and being configured to receive an outer edge of the inner frame in order to support the inner frame; and a mechanical buffer disposed between the fixing frame and the inner frame. ### Claim 9 (depends on 8) The combustor according to claim 8, the fixing recess is further configured to receive the mechanical buffer on an inner surface of the fixing recess. ### Claim 10 (depends on 9) The combustor according to claim 9, wherein the mechanical buffer comprises: a radial buffer configured to absorb a radial displacement of the inner frame with respect to the fixing frame; and an axial buffer configured to absorb an axial displacement of the inner frame with respect to the fixing frame. ### Claim 11 (depends on 10) The combustor according to claim 10, wherein the radial buffer comprises a ball spring inserted into the fixing recess between the inner frame and a first inner surface of the fixing frame. ### Claim 12 (depends on 10) The combustor according to claim 10, wherein the axial buffer comprises a ball spring inserted into the fixing recess between the inner frame and a second inner surface of the fixing frame. ### Claim 13 (depends on 8) The combustor according to claim 8, further comprising insert pieces formed at regular intervals on the outer edge of the inner frame and configured to be respectively inserted into the fixing recess. ### Claim 14 (depends on 13) The combustor according to claim 13, wherein the inner circumferential surface of the fixing frame includes auxiliary fixing recesses formed to correspond to the insert pieces of the inner frame, and the auxiliary fixing recesses are configured to respectively receive an axial insertion of the insert pieces.