US4074520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber for gas turbine
Assignee: ABB Stal AB
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Filing: 1976-08-04
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Granted: 1978-02-21
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Expires: 1996-08-04
Abstract
Abstract An improved combustion chamber for devices such as gas turbines includes a flame tube having burners and a center tube extending through its end wall. The openings for the burners and the center tube are co-planar in the end wall to allow some angular movement of the flame tube relative to the center tube. A bayonet joint between the flame tube and the center tube includes a spherical bearing surface to permit such angular movement but to prevent axial movement. A unique locking pin geometry is also disclosed.
Inventors
- 👤 Martin Mansson
- 👤 Ragnar Torstenfelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:26
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
185 words
In a combustion chamber of the type adapted for use with a gas turbine, said chamber including an outer mantle; a cylindrical flame tube arranged within said outer mantle, said flame tube having an upstream end wall; a center tube extending within said flame tube through a central opening in said end wall, said central opening being sized to permit movement of said end wall relative to said center tube and said center tube being provided with openings to pass air into the center of said flame tube; and a plurality of burnes arranged around said center tube and extending into said flame tube through a corresponding plurality of openings in said end wall, each of said plurality of openings being sized to permit movement of said end wall relative to said burners, the improvement comprising: the placement of said central opening and said plurality of openings in said end wall of said flame tube for said center tube and said burners in a common plane, whereby a certain angular deviation between the longitudinal axis of said flame tube and said center tube is permitted.
Claim 2
Dependent Claim
185 words
In a combustion chamber of the type adapted for use with a gas turbine, said chamber including an outer mantle; a cylindrical flame tube arranged within said outer mantle, said flame tube having an upstream end wall; a center tube extending within said flame tube through a central opening in said end wall, said central opening being sized to permit movement of said end wall relative to said center tube and said center tube being provided with openings to pass air into the center of said flame tube; and a plurality of burnes arranged around said center tube and extending into said flame tube through a corresponding plurality of openings in said end wall, each of said plurality of openings being sized to permit movement of said end wall relative to said burners, the improvement comprising: the placement of said central opening and said plurality of openings in said end wall of said flame tube for said center tube and said burners in a common plane, whereby a certain angular deviation between the longitudinal axis of said flame tube and said center tube is permitted.
Claim 3
Dependent Claim
59 words
The improvement of claim 1 wherein said flame tube comprises a radially inwardly-turned collar and said center tube comprises a radially outwardly turned collar, said inwardly and outwardly turned collars having spherical mating surfaces with their center of curvature lying in said common plane, whereby said angular deviation is permitted and said flame tube is prevented from downstream movement.
Claim 4
Dependent Claim
16 words
The improvement of claim 2 wherein said collars comprise cut-out portions to form a bayonet joint.
Claim 5
Dependent Claim
27 words
The improvement of claim 3, wherein a locking pin is inserted through at least one of said cut out portions to prevent rotation of said bayonet joint.
Claim 6
Dependent Claim
38 words
The improvement of claim 4, wherein said pin is provided with an edge on which said center tube bears upon movement of said center tube in the upstream direction, whereby upstream movement of said center tube is limited.
References Cited (Backward Citations)
US2801520A
Cited
US3433015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |