US3728859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel nozzle for gas turbine engines
Assignee: MTU Aero Engines AG
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Filing: 1970-09-11
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Granted: 1973-04-24
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Expires: 1990-09-11
Abstract
Abstract A fuel nozzle for gas turbine engines in which the fuel jets leaving the fuel metering sections draw-in air delivered by the compressor of the gas turbine engine through passages provided in the nozzle housing; a piston-shaped insert is arranged in the nozzle housing to move relative to the latter so as to vary the quantity of compressor air to be supplied to the fuel nozzle and/or the quantity of the fuel/air mixture to be discharged from the nozzle as the piston-shaped insert means is displaced.
Inventors
- 👤 B Seiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:08
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/22
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
171 words
A fuel nozzle for use on gas turbine engines and the like comprising: fuel metering orifice means for emitting fuel jets therefrom, first mixing means for receiving the fuel jets from said fuel metering orifice means, first air intake means in communication with the said first mixing means responsive to the fuel jets for drawing air into said first mixing means wherein the fuel and air is preliminarily mixed, second mixing means in communication with said first mixing means for receiving the premixed fuel and air for further mixing of the fuel and air before the mixture is emitted from said nozzle, said first mixing means including a first chamber and said second mixing means including a second chamber, said first and second chambers being arranged in a common housing, a piston-type insert means positioned in said housing, and adjusting means for adjusting the supply of air through said first air intake means, said adjusting means including means for varying the position of said insert means with respect to said housing.
Claim 2
Dependent Claim
171 words
A fuel nozzle for use on gas turbine engines and the like comprising: fuel metering orifice means for emitting fuel jets therefrom, first mixing means for receiving the fuel jets from said fuel metering orifice means, first air intake means in communication with the said first mixing means responsive to the fuel jets for drawing air into said first mixing means wherein the fuel and air is preliminarily mixed, second mixing means in communication with said first mixing means for receiving the premixed fuel and air for further mixing of the fuel and air before the mixture is emitted from said nozzle, said first mixing means including a first chamber and said second mixing means including a second chamber, said first and second chambers being arranged in a common housing, a piston-type insert means positioned in said housing, and adjusting means for adjusting the supply of air through said first air intake means, said adjusting means including means for varying the position of said insert means with respect to said housing.
Claim 3
Dependent Claim
78 words
A fuel nozzle according to claim 1, wherein the first chamber is formed between an annular groove in said insert means and the walls of said housing, said first air intake means including at least one first air intake aperture through the walls of said housing, and wherein the effective opening of said at least one first air intake aperture is varied by the edges of said annular groove upon a change in position of the insert means.
Claim 4
Dependent Claim
48 words
A fuel nozzle according to claim 2, wherein second air intake means including at least one second air intake aperture in said housing walls leading to said second chamber are provided for supplying additional air to be mixed with the premixed fuel and air in said second chamber.
Claim 5
Dependent Claim
32 words
A fuel nozzle according to claim 3, wherein each of said at least one second air intake apertures are tangentially arranged for imparting a swirling motion to the fuel and air mixture.
Claim 6
Dependent Claim
54 words
A fuel nozzle according to claim 1, wherein the fuel supply pressure for supplying said fuel metering orifice means is in communication with a first end face of said insert means, and wherein the means for varying the position of said insert means includes the fuel pressure force supplied against said first end face.
Claim 7
Dependent Claim
23 words
A fuel nozzle according to claim 5, wherein resetting means are provided in said housing for dampening the movement of the insert means.
Claim 8
Dependent Claim
15 words
A fuel nozzle according to claim 6, wherein said resetting means is a return spring.
Claim 9
Dependent Claim
27 words
A fuel nozzle according to claim 5, wherein said fuel metering orifice means extend from said first end face through said insert means to said first chamber.
Claim 10
Dependent Claim
51 words
A fuel nozzle according to claim 3, wherein said insert means includes an annular shroud extending over portions of the second chamber, said annular shroud including means for varying the effective opening of each of the at least one second air intake apertures in response to movement of said insert means.
Claim 11
Dependent Claim
41 words
A fuel nozzle according to claim 9, wherein the means for varying the opening of the at least one second air intake apertures includes apertures arranged on said shroud for selective alignment with the at least one second air intake apertures.
Claim 12
Dependent Claim
86 words
A fuel nozzle according to claim 2, wherein the end of said insert means downstream of said second chamber is formed as a spray cone, wherein said housing is provided with a correspondingly shaped cone bush member which cooperates with said spray cone to vary the emission of fuel and air mixture from the nozzle in response to movement of said insert means, and wherein said cone bush member is movably adjustable with respect to said housing for varying the effective stroke of said insert means.
Claim 13
Dependent Claim
31 words
A fuel nozzle according to claim 5, wherein said housing is provided with adjustable stop means for varying the limit position of said first end face with respect to said housing.
Claim 14
Dependent Claim
40 words
A fuel nozzle according to claim 12, wherein said housing is provided with further adjustable stop means for varying the limit position of an end face of said insert means which faces oppositely with respect to said first end face.
Claim 15
Dependent Claim
86 words
A fuel nozzle according to claim 3, wherein the end of said insert means downstream of said second chamber is formed as a spray cone, wherein said housing is provided with a correspondingly shaped cone bush member which cooperates with said spray cone to vary the emission of fuel and air mixture from the nozzle in response to movement of said insert means, and wherein said cone bush member is movably adjustable with respect to said housing for varying the effective stroke of said insert means.
Claim 16
Dependent Claim
54 words
A fuel nozzle according to claim 9, wherein the fuel supply pressure for supplying said fuel metering orifice means is in communication with a first end face of said insert means, and wherein the means for varying the position of said insert means includes the fuel pressure force supplied against said first end face.
Claim 17
Dependent Claim
31 words
A fuel nozzle according to claim 1, wherein said means for varying the position of said insert means includes solenoid valve means formed in part by portions of said insert means.
Claim 18
Dependent Claim
32 words
A fuel nozzle according to claim 16, wherein means are provided for actuating said solenoid valve means as a function of output signals of a gas turbine engine using the fuel nozzle.
Claim 19
Dependent Claim
31 words
A fuel nozzle according to claim 9, wherein said means for varying the position of said insert means includes solenoid valve means formed in part by portions of said insert means.
Claim 20
Dependent Claim
32 words
A fuel nozzle according to claim 18, wherein means are provided for actuating said solenoid valve means as a function of output signals of a gas turbine engine using the fuel nozzle.
Claim 21
Dependent Claim
17 words
A fuel nozzle according to claim 17, wherein said output signals correspond to the engine rotational speed.
Claim 22
Dependent Claim
56 words
A fuel nozzle according to claim 2, further comprising an annular sleeve in surrounding engagement with said housing, wherein said sleeve includes apertures communicating with a compressed air supply, and wherein said sleeve is axially adjustable with respect to said housing to vary the supply of air to the at least one first air intake aperture.
Claim 23
Dependent Claim
66 words
A fuel nozzle according to claim 9, further comprising an annular sleeve in surrounding engagement with said housing, wherein said sleeve includes apertures communicating with a compressed air supply, and wherein said sleeve is axially adjustable with respect to said housing to vary the supply of air to the at least one first air intake aperture and to the at least one second air intake aperture.
Claim 24
Dependent Claim
40 words
A fuel nozzle according to claim 9, wherein a plurality of first air intake apertures and a plurality of second air intake apertures are provided, said first and second apertures being symmetrically spaced around the respective first and second chambers.
Claim 25
Dependent Claim
31 words
A fuel nozzle according to claim 2, wherein the air supplied to tHe first air intake means is from the compressor system of a gas turbine engine utilizing the fuel nozzle.
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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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |