US3777983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cooled dual fuel air atomized fuel nozzle
Assignee: General Electric Co
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Filing: 1971-12-16
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Granted: 1973-12-11
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Expires: 1991-12-16
Abstract
Abstract A dual fuel, air-atomized, fuel nozzle of the type prevalent in some gas turbine combustion chambers wherein the hot atomizing air conduit is remotely positioned with respect to a central liquid fuel or oil conduit so that the nozzle will operate cooler during liquid fuel operation. A gaseous fuel conduit is interposed between the liquid fuel conduit and the atomizing air conduit to provide additional nozzle cooling during the gaseous fuel operation while preventing thermal breakdown of any liquid fuel residuum which could cause nozzle clogging.
Inventors
- 👤 W Hibbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:41
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/10; F23D11/106; F23D17/00; F23D17/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
A dual fuel, air-atomized fuel nozzle of the type used in a combustion chamber for a gas turbine, said nozzle including: a nozzle support ring having concentric flange portions and a center opening; a liquid fuel conduit partially disposed within said center opening and engaging a first concentric flange; an annular nozzle cap partially disposed about said liquid fuel conduit and engaging a second concentric flange to define an annular gas plenum with said support ring and said liquid fuel conduit; at least one gas supply pipe interconnecting said gas plenum with a gas supply through said nozzle support ring; and, gas passageways through said nozzle cap interconnecting the gas plenum with said combusion chamber; and, an annular retaining ring abutting said nozzle cap and engaging a third concentric flange to define an annular atomizing air plenum with said support ring and said nozzle cap, whereby said liquid fuel conduit is insulated from said atomizing air plenum by said gas plenum, gas supply pipe and said gas passageways.
Claim 2
Dependent Claim
168 words
A dual fuel, air-atomized fuel nozzle of the type used in a combustion chamber for a gas turbine, said nozzle including: a nozzle support ring having concentric flange portions and a center opening; a liquid fuel conduit partially disposed within said center opening and engaging a first concentric flange; an annular nozzle cap partially disposed about said liquid fuel conduit and engaging a second concentric flange to define an annular gas plenum with said support ring and said liquid fuel conduit; at least one gas supply pipe interconnecting said gas plenum with a gas supply through said nozzle support ring; and, gas passageways through said nozzle cap interconnecting the gas plenum with said combusion chamber; and, an annular retaining ring abutting said nozzle cap and engaging a third concentric flange to define an annular atomizing air plenum with said support ring and said nozzle cap, whereby said liquid fuel conduit is insulated from said atomizing air plenum by said gas plenum, gas supply pipe and said gas passageways.
Claim 3
Dependent Claim
45 words
The nozzle as recited in claim 1 wherein the nozzle cap is formed with a plurality of circumferentially arrayed blades disposed within the combustion chamber and having holes between selected blades; the gas passages interconnecting the gas plenum with the holes between circumferentially arrayed blades.
Claim 4
Dependent Claim
46 words
The nozzle as recited in claim 1 wherein the nozzle cap is formed with a plurality of concentrically arrayed outlet holes communicating with the combustion chamber and through the face of the nozzle cap; the gas passageways interconnecting the gas plenum with said circumferentially arrayed holes.
Claim 5
Dependent Claim
33 words
The nozzle as recited in claim 1 further including a plurality of atomizing air inlet pipes passing through the nozzle support ring and interconnecting the atomizing air plenum with an atomizing air supply.
Claim 6
Dependent Claim
35 words
The nozzle as recited in claim 4 further including a plurality of atomizing air passageways interconnecting the atomizing air plenum with a distribution ring in communication with an oil nozzle within the liquid fuel conduit.
Claim 7
Dependent Claim
22 words
The nozzle as recited in claim 1 wherein the first, second and third concentric flanges are threaded for easy assembly and disassembly.
Claim 8
Dependent Claim
25 words
The nozzle as recited in claim 1 wherein said nozzle cap and retaining ring are formed with inwardly and outwardly directed flanges forming a seal.
References Cited (Backward Citations)
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US3285007A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |