EP4545855A2 - Additiv getakteter kraftstoffeinspritzbolzen - Google Patents

Additiv getakteter kraftstoffeinspritzbolzen Download PDF

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Publication number
EP4545855A2
EP4545855A2 EP24208409.3A EP24208409A EP4545855A2 EP 4545855 A2 EP4545855 A2 EP 4545855A2 EP 24208409 A EP24208409 A EP 24208409A EP 4545855 A2 EP4545855 A2 EP 4545855A2
Authority
EP
European Patent Office
Prior art keywords
fuel injector
boss
unitary
threads
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP24208409.3A
Other languages
English (en)
French (fr)
Other versions
EP4545855A3 (de
Inventor
Lawrence A. BINEK
Jose R. PAULINO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
RTX Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RTX Corp filed Critical RTX Corp
Publication of EP4545855A2 publication Critical patent/EP4545855A2/de
Publication of EP4545855A3 publication Critical patent/EP4545855A3/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/54—Reverse-flow combustion chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00017—Assembling combustion chamber liners or subparts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00018—Manufacturing combustion chamber liners or subparts

Definitions

  • the present disclosure relates generally to threaded components and, more particularly, to threaded components with a clocking feature.
  • Threading is commonly used to secure various components to larger structures.
  • the final angular orientation of a threaded component with regard to a larger structure is relatively unimportant.
  • the torquing/preloading on the threaded component is typically more important to ensure retention of the threaded component in the larger structure, to provide a leak-free connection with the larger structure, and to avoid damage to the threads of the threaded component and larger structure.
  • the angular orientation of the threaded component with regard to the larger structure is important. Using conventional manufacturing methods, it may not be possible to produce a threaded component that will reliably achieve the desired angular orientation because the required assembly torque or preload is independent of the final position of the angular feature such that the required assembly torque or preload can be achieved regardless of whether the desired angular orientation is achieved.
  • One aspect of the present invention is directed to a fuel injector bolt including a bolt head having a visual fuel injector clocking indicator, a threaded body that includes fuel injector threads, one or more fuel intakes, a fuel injector channel, and an angled face that includes a fuel orifice.
  • the fuel injector threads include a fastener arresting face.
  • the visual fuel injector clocking indicator is configured to align with a visual boss clocking indicator when the fuel injector bolt is fully threaded into a unitary, monolithic combustor body boss.
  • the fuel injector threads are configured to engage with boss threads and the fastener arresting face is configured to engage with a boss arrestor face when the fuel injector bolt is fully threaded into a unitary, monolithic combustor body boss, wherein the boss threads are positioned in a unitary, monolithic combustor body boss and the boss arrestor face is formed in the boss threads.
  • the one or more fuel intakes are configured to align with a fuel injector channel formed in a unitary, monolithic combustor body.
  • the fuel orifice is configured to deliver fuel into a dilution air channel formed in a unitary, monolithic combustor body.
  • the fuel injector bolt is formed from a nickel-based alloy using additive manufacturing techniques.
  • a gas turbine engine combustor that includes a unitary, monolithic combustor body and a unitary, monolithic combustor body boss formed in the unitary, monolithic combustor body.
  • the unitary, monolithic combustor body includes boss threads and a visual boss clocking indicator.
  • the unitary, monolithic combustor body boss is configured to receive, with the boss threads, a fuel injector bolt.
  • the fuel injector bolt includes a bolt head having a visual fuel injector clocking indicator, a threaded body that includes fuel injector threads, one or more fuel intakes, a fuel injector channel, and an angled face that includes a fuel orifice.
  • the fuel injector threads include a fastener arresting face.
  • the visual fuel injector clocking indicator is configured to align with a visual boss clocking indicator when the fuel injector bolt is fully threaded into a unitary, monolithic combustor body boss.
  • the fuel injector threads are configured to engage with boss threads and the fastener arresting face is configured to engage with a boss arrestor face when the fuel injector bolt is fully threaded into a unitary, monolithic combustor body boss, wherein the boss threads are positioned in a unitary, monolithic combustor body boss and the boss arrestor face is formed in the boss threads.
  • the one or more fuel intakes are configured to align with a fuel injector channel formed in a unitary, monolithic combustor body.
  • the fuel orifice is configured to deliver fuel into a dilution air channel formed in a unitary, monolithic combustor body.
  • the unitary, monolithic combustor body is positioned along a primary combustor axis and the fuel injector bolt is positioned along a fuel injector axis, wherein the fuel injector axis is parallel with but offset from the primary combustor axis.
  • Yet another aspect of the present invention is directed to a method of making a gas turbine engine combustor the includes forming, using additive manufacturing (AM) techniques, a unitary, monolithic combustor body and fuel injector bolt, aligning fuel injector threads formed on the fuel injector bolt with boss threads of a unitary, monolithic combustor body boss formed in the unitary, monolithic combustor body and threading the fuel injector bolt into the unitary, monolithic combustor body boss until a fastener arresting face on fuel injector threads engages with a boss arresting face on boss threads, thereby stopping rotation of the fuel injector bolt in the unitary, monolithic combustor body boss.
  • AM additive manufacturing
  • the unitary, monolithic combustor body includes the boss threads and a visual boss clocking indicator.
  • the unitary, monolithic combustor body boss is configured to receive, with the boss threads, the fuel injector bolt.
  • the fuel injector bolt includes a bolt head having the visual fuel injector clocking indicator, a threaded body that includes the fuel injector threads, one or more fuel intakes, a fuel injector channel, and an angled face that includes a fuel orifice.
  • the fuel injector threads include a fastener arresting face.
  • the boss threads are chased to finish the boss threads.
  • the fuel injector threads are chased to finish the fuel injector threads.
  • the one or more fuel intakes are configured to align with a fuel injector channel formed in a unitary, monolithic combustor body.
  • the fuel orifice is configured to deliver fuel into a dilution air channel formed in a unitary, monolithic combustor body.
  • the fuel injector bolt is formed from a nickel-based alloy using additive manufacturing techniques.
  • the unitary, monolithic combustor body is positioned along a primary combustor axis and the fuel injector bolt is positioned along a fuel injector axis, wherein the fuel injector axis is parallel with but offset from the primary combustor axis.
  • Controlling the starting location of the threads permits the threaded component to be manufactured so that both torque/preload and final angular location of a feature can be achieved reliably. For example, if the thread starting point and number of turns required to achieve the desired torque/preload are known, the orientation of the angular feature after the threaded component is tightening can be predicted and used as a design criterion for the threaded component.
  • the gas turbine engine combustor assembly 10 receives compressed air from a compressor section (not shown), mixes the air with fuel from a fuel injector 30 to create a combustible fuel/air mixture, and burns the fuel/air mixture to generate hot, high velocity combustor exhaust gases that are directed to a turbine section (not shown).
  • the gas turbine engine combustor assembly 10 includes a unitary, monolithic combustor body 12 with a boss 14 having boss threads 16 for receiving the fuel injector 30 and a visual boss clocking indicator 18.
  • the combustor body 12 also includes fuel feed channel 20 and dilution air channel 22.
  • the combustor 10 is generally arranged along primary combustor axis A as shown in Fig. 1 .
  • the fuel injector 30 is generally arranged along fuel injector axis B, which is parallel to but offset from the primary combustor axis A.
  • the fuel injector 30 is in the form of a bolt with a bolt head 32.
  • the fuel injector 30 includes a visual fuel injector clocking indicator 34, threaded body 36 that includes fuel injector threads 38, fuel intakes 40, fuel injector channel 42 (not shown in Fig. 2 , see Fig. 1 ), and an angled face 44 that includes a fuel orifice 46 (better seen in Figs. 1 and 3 ).
  • the fuel intakes 40 are positioned such that when the fuel injector 30 is fully threaded into the boss 14, the fuel intakes 40 align with a fuel feed channel 20 (see Fig.
  • the fuel orifice 46 is formed in the angled face 44 to direct fuel exiting the fuel injector 30 to enter the air flowing through the air dilution channel 22 in a desired orientation to provide a desired degree of mixing between the fuel and the air.
  • the specific size and dimensions of the fuel orifice 46 and the specific angle of the angled face 44 are selected to provide the desired degree of mixing between the fuel and the air when the fuel injector 30 is fully threaded into the boss 14.
  • Fig. 4 shows an enlarged view of a portion of the fuel injector 30, highlighting the visual fuel injector clocking indicator 34 and the portion of the fuel injector body 36 that includes the final portion of the fuel injector threads 38 and a fastener arresting face 48.
  • the fastener arresting face 48 is configured to cooperate with a boss thread arresting face (not shown) that forms a part of the boss threads 16 of the boss 14 to stop rotation of the fuel injector 30 while it is threaded into the boss 14 when the fuel injector 30 is fully threaded into the boss 14 (i.e., the fuel injector 30 achieves both the desired torque/preload and the desired final angular location of that fuel orifice 46).
  • the visual fuel injector clocking indicator 34 will align with a corresponding visual boss clocking indicator 18 (see Fig. 1 ) on the unitary, monolithic combustor body 12.
  • any AM technique can be used for forming the unitary, monolithic combustor body 12, including the fuel feed channel 20 and dilution air channel 22, and the fuel injector 30, including the fuel intakes 40 and fuel orifice 46.
  • the fuel intakes 40 and fuel orifice 46 can be formed using mechanical machining processes in post-processing steps.
  • the unitary, monolithic combustor body 12 and the fuel injector 30 can be made with any materials deem suitable for the particular application.
  • nickel-based alloys such as INCO 625, can be used for the disclosed unitary, monolithic combustor body 12 and the fuel injector 30 to address the high temperatures encountered in these structures.
  • the AM technique can be PBF-L or PBF-EB or any other suitable AM technique.
  • threads made using AM techniques can be "cleaned up" using a post-processing thread chasing step.
  • the fuel injector threads 38 on the fuel injector 30, including the fastener arresting face 48, and the boss threads 16 of the boss 14, including the boss thread arresting face can be made with a PBF-L process.
  • the fuel injector threads 38 and the boss threads 16 are chased using techniques known in the art to establish finished threads.
  • the combustor assembly 10 can be completed by threading the fuel injector 30 into the boss 14 as described above.
  • the combustor assembly 10 of this disclosure fits into a more compact envelope in the vehicle for which it is intended.
  • the alignment features on the fuel injector 30 (the visual fuel injector clocking indicator 34 and the fastener arresting face 48) and the boss 14 (visual boss clocking indictor 18 and the boss thread arresting face) provide physical and visual mistake proofing to ensure desired orientation of the fuel orifice 46 in the air dilution channel 22.
  • Combining AM manufacturing techniques with selected post-processing steps, i.e., chasing of the fuel injector threads 38 and the boss threads 16 and, if desired, formation of the fuel orifice 46 in the angled face 44 provide cost effective, precision manufacturing to the combustor assembly 10.
  • a fuel injector bolt comprises a bolt head having a visual fuel injector clocking indicator, a threaded body that includes fuel injector threads, one or more fuel intakes, a fuel injector channel, and an angled face that includes a fuel orifice.
  • the fuel injector threads include a fastener arresting face.
  • the fuel injector bolt of the preceding paragraph can optionally include, additionally and/or alternatively, any one or more of the following features, configurations and/or additional elements:
  • the visual fuel injector clocking indicator is configured to align with a visual boss clocking indicator when the fuel injector bolt is fully threaded into a unitary, monolithic combustor body boss.
  • a gas turbine engine combustor comprising a unitary, monolithic combustor body and a unitary, monolithic combustor body boss formed in the unitary, monolithic combustor body.
  • the unitary, monolithic combustor body includes boss threads and a visual boss clocking indicator.
  • the unitary, monolithic combustor body boss is configured to receive, with the boss threads, a fuel injector bolt.
  • the fuel injector bolt comprises a bolt head having a visual fuel injector clocking indicator, a threaded body that includes fuel injector threads, wherein the fuel injector threads include a fastener arresting face, one or more fuel intakes, a fuel injector channel, and an angled face that includes a fuel orifice.
  • the visual fuel injector clocking indicator is configured to align with a visual boss clocking indicator when the fuel injector bolt is fully threaded into a unitary, monolithic combustor body boss.
  • the gas turbine engine combustor of any of the preceding paragraphs wherein the unitary, monolithic combustor body is positioned along a primary combustor axis and the fuel injector bolt is positioned along a fuel injector axis, wherein the fuel injector axis is parallel with but offset from the primary combustor axis.
  • a method of making a gas turbine engine combustor comprises forming, using additive manufacturing (AM) techniques, a unitary, monolithic combustor body.
  • the unitary, monolithic combustor body has a unitary, monolithic combustor body boss formed in the unitary, monolithic combustor body, wherein the unitary, monolithic combustor body includes boss threads and a visual boss clocking indicator, wherein the unitary, monolithic combustor body boss is configured to receive, with the boss threads, a fuel injector bolt.
  • the boss threads are chased to finish the boss threads.
  • the fuel injector threads of the fuel injector bolt are aligned with the boss threads of the unitary, monolithic combustor body boss and the fuel injector bolt is threaded into the unitary, monolithic combustor body boss until the fastener arresting face on the fuel injector threads engages with a boss arresting face on the boss threads, thereby stopping rotation of the fuel injector bolt in the unitary, monolithic combustor body boss.
  • the visual fuel injector clocking indicator on the bolt head aligns with the visual boss clocking indicator on the unitary, monolithic combustor body boss.
  • the one or more fuel intakes are configured to align with a fuel injector channel formed in a unitary, monolithic combustor body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP24208409.3A 2023-10-27 2024-10-23 Additiv getakteter kraftstoffeinspritzbolzen Pending EP4545855A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18/496,615 US20250137642A1 (en) 2023-10-27 2023-10-27 Additive clocked fuel injector bolt

Publications (2)

Publication Number Publication Date
EP4545855A2 true EP4545855A2 (de) 2025-04-30
EP4545855A3 EP4545855A3 (de) 2025-05-14

Family

ID=93258967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24208409.3A Pending EP4545855A3 (de) 2023-10-27 2024-10-23 Additiv getakteter kraftstoffeinspritzbolzen

Country Status (2)

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US (1) US20250137642A1 (de)
EP (1) EP4545855A3 (de)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986061A (en) * 1932-11-05 1935-01-01 Clark Metal Products Inc Lock thread for screw caps and the like
US3192711A (en) * 1962-11-29 1965-07-06 Bob C Miller Nozzle position and afterburner lighting indicator
US5033263A (en) * 1989-03-17 1991-07-23 Sundstrand Corporation Compact gas turbine engine
US5277022A (en) * 1990-06-22 1994-01-11 Sundstrand Corporation Air blast fuel injecton system
US10488047B2 (en) * 2014-01-24 2019-11-26 United Technologies Corporation Thermally compliant additively manufactured fuel injector
US10518321B2 (en) * 2016-12-22 2019-12-31 Siemens Aktiengesellschaft Casting method and manifold cast with conduits effective for removing a core from the cast without forming extraneous holes in the body of the manifold
US11021986B2 (en) * 2018-03-20 2021-06-01 Raytheon Technologies Corporation Seal assembly for gas turbine engine
US11060460B1 (en) * 2019-04-01 2021-07-13 Marine Turbine Technologies, LLC Fuel distribution system for gas turbine engine
US11543127B2 (en) * 2020-02-14 2023-01-03 Raytheon Technologies Corporation Gas turbine engine dilution chute geometry
US11846421B2 (en) * 2020-02-14 2023-12-19 Rtx Corporation Integrated fuel swirlers
US12066188B2 (en) * 2021-03-26 2024-08-20 Rtx Corporation Modular injector bolt for an engine

Also Published As

Publication number Publication date
EP4545855A3 (de) 2025-05-14
US20250137642A1 (en) 2025-05-01

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