# US 2021/0278083 A1 · Fuel manifolds

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- Number: US 2021/0278083 A1
- Document ID: US20210278083A1
- Status: Published application
- Kind: A1
- Application number: 17/329,566
- Filed: 2021-05-25
- Published: 2021-09-09
- Earliest claimed: 2019-07-22
- Assignees: Delavan Inc.
- Applicants: Delavan Inc.
- Inventors: Jason Ryon; Lev A. Prociw; Gregory A. Zink
- Web page: https://patentgrep.com/patent/US20210278083A1

## CPC

- F23R 3/02: characterised by the air-flow or gas-flow configuration (reverse- flow combustion chambers F23R3/54; cyclone or vortex type combustion chambers F23R3/58)
- F02C 7/222: {Fuel flow conduits, e.g. manifolds}
- F02C 7/24: Heat or noise insulation (air intakes having provisions for noise suppression F02C7/045; turbine exhaust heads, chambers, or the like F01D25/30; silencing nozzles of jet-propulsion plants F02K1/00)
- F23R 3/28: characterised by the fuel supply (burners F23D)
- F23R 3/34: Feeding into different combustion zones
- F23R 3/50: Combustion chambers comprising an annular flame tube within an annular casing (toroidal combustion chambers F23R3/52)
- B33Y 10/00: Processes of additive manufacturing
- F05D 2230/31: Layer deposition
- Y02P 10/25: Process efficiency
- 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)
- 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)
- 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
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A fuel injection system includes an outer support defining a fuel manifold and an inner support, with a feed arm extending radially between the inner support and the outer support. A plurality of outlet openings extending in an axial direction from the feed arm for feeding respective injection nozzles. The feed arm defines a plurality of fuel passages therethrough in fluid communication with the fuel manifold and outlet openings to supply fuel from the fuel manifold to the outlet openings. A heat shield extends from the outer support to the inner support and extends about the outer support and the feed arm to provide heat shielding to the fuel manifold and the fuel passages.

## Claims

### Claim 1

A method of making a fuel injector system comprising:
additively manufacturing a circumferentially extending outer support together with a circumferentially extending inner support, a feed arm extending radially between the inner support and the outer support, and a heat shield extending from the outer support to the inner support and extending about the outer support and the feed arm, wherein the heat shield is spaced apart from the feed arm with an insulative gap, wherein the additively manufacturing includes building in an axial build direction beginning from downstream portions of the inner and outer supports.

### Claim 2 (depends on 1)

The method as recited in claim 1, wherein additively manufacturing includes forming the feed arm and a portion of the heat shield adjacent the feed arm by additively growing the feed arm and heat shield in the axial build direction, wherein the feed arm and portion of the heat shield adjacent to the feed arm are self-supporting as they are grown and are grown to define a vaulted angle relative to the axial build direction.

### Claim 3 (depends on 1)

The method as recited in claim 1, wherein additively manufacturing includes forming vaulted weight reduction voids within the feed arm.

### Claim 4 (depends on 1)

The method as recited in claim 1, wherein additively manufacturing includes forming vaulted fuel manifold passages in the outer support.