GAS TURBINE ENGINE FUEL INJECTOR ASSEMBLY WITH AIR PURGE

(19)

(11)

EP 4 786 856 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.10.2026 Bulletin 2026/43

(43)	Date of publication A2:
	05.08.2026 Bulletin 2026/32

(21)	Application number: 26186847.5

(22)	Date of filing: 31.01.2024

(51)

International Patent Classification (IPC):

F23R 3/14^(2006.01)

F23R 3/28^(2006.01)

(52)	Cooperative Patent Classification (CPC):
	F23R 3/14; F23R 3/283

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)

Priority:

31.01.2023 US 202363442334 P

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	24155110.0 / 4411230

(71)	Applicant: RTX Corporation
	Farmington, CT 06032 (US)

(72)	Inventors:
	DAI, Zhongtao West Hartford, 06107 (US) KIM, Wookyung Glastonbury, 06033 (US) KRAMER, Stephen K. Cromwell, 06416 (US) DILLARD, Gary J. Gainesville, 32608 (US) SEN, Baris A. S. Glastonbury, 06073 (US)

(74)	Representative: Dehns
	10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)

(54)	GAS TURBINE ENGINE FUEL INJECTOR ASSEMBLY WITH AIR PURGE

(57) An assembly is provided for a gas turbine engine (20). This assembly includes an air swirler structure (66), an injector nozzle (114) and a nozzle guide (70). The air swirler structure (66) includes an inner bore (108) and an air swirler passage (102). The inner bore (108) extends axially along an axis (72) through the air swirler structure (66). The air swirler passage (102) extends radially into the air swirler structure (66) to the inner bore (108). The injector nozzle (114) projects axially into the inner bore (108). The nozzle guide (70) couples the injector nozzle (114) to the air swirler structure (66). The nozzle guide (70) includes a guide foot (146) and an air purge passage (144) radially outboard of the guide foot (146). The guide foot (146) is configured to radially engage the injector nozzle (114). The air purge passage (144) extends across the nozzle guide (70) and axially to the inner bore (108).

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