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US4999996A
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US
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System for mounting a pre-vaporizing bowl to a combustion chamber
Assignee: Safran Aircraft Engines SAS
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Filing: 1989-11-17
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Granted: 1991-03-19
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Expires: 2009-11-17
Abstract
Abstract A system is disclosed for mounting the pre-vaporizing bowl to a wall of a turbine engine combustion chamber in such a manner that it is centered and in alignment with an opening, through the combustion chamber wall during assembly. Not only does the system provide for the centering of the pre-vaporizing bowl in the combustion chamber wall opening, but it also allows relative radial movement between these elements after the engine has been assembled. The system includes a support collar fixedly attached to the combustion chamber wall so as to extend around the generally circular opening in the upstream portion of the combustion chamber, as well as a locating flange fixedly attached to the pre-vaporizing bowl. A stud extending from the locating flange extends through a slot in the support collar such that only radial movement between the locating lfange and the support collar (and consequently between the pre-vaporizing bowl and the combustion chamber wall) is permitted. A resilient snap clip is interposed between the support collar and the locating flange.
Inventors
- 👤 Francois Duchene
- 👤 Alexandre Forestier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:52
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/60; F23R3/28; F23R3/283
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
A system for mounting a pre-vaporizing bowl to a combustion chamber wall of a gas turbine engine having a longitudinal axis, comprising: (a) a generally circular opening defined by an upstream end of the combustion chamber wall; (b) locating flange means fixedly attached to the pre-vaporizing bowl; (c) a support collar fixedly attached to said combustion chamber wall so as to extend around the opening; (d) means interconnecting the locating flange means and the support collar so as to allow only generally radial movement therebetween thereby allowing generally radial movement between the pre-vaporizing bowl and the combustion chamber wall; and, (e) resilient means operatively interposed between the support collar and the locating flange means to exert a force on the locating flange means to locate the pre-vaporizing bowl in approximate alignment with the opening in the upstream end of the combustion chamber wall.
Claim 2
Independent Claim
143 words
A system for mounting a pre-vaporizing bowl to a combustion chamber wall of a gas turbine engine having a longitudinal axis, comprising: (a) a generally circular opening defined by an upstream end of the combustion chamber wall; (b) locating flange means fixedly attached to the pre-vaporizing bowl; (c) a support collar fixedly attached to said combustion chamber wall so as to extend around the opening; (d) means interconnecting the locating flange means and the support collar so as to allow only generally radial movement therebetween thereby allowing generally radial movement between the pre-vaporizing bowl and the combustion chamber wall; and, (e) resilient means operatively interposed between the support collar and the locating flange means to exert a force on the locating flange means to locate the pre-vaporizing bowl in approximate alignment with the opening in the upstream end of the combustion chamber wall.
Claim 3
Dependent Claim
45 words
The mounting system according to claim 1 wherein the interconnecting means comprises: (a) a generally radially opening slot defined by the support collar; and, (b) a generally radially extending stud extending from the locating flange means and located so as to pass through the slot.
Claim 4
Dependent Claim
28 words
The mounting system according to claim 2 wherein the resilient means exerts the force on the locating flange means at a point approximately opposite the radially extending stud.
Claim 5
Dependent Claim
38 words
The mounting system according to claim 3 wherein the resilient means comprises a snap clip having an arcuate shape, a radius of the arc being larger than a radius of the locating flange means and the support collar.
Claim 6
Dependent Claim
47 words
The mounting system according to claim 4 wherein the snap clip has a boss portion at each end and further comprising second slots defined by the support collar located such that a boss portion enters a second slot to attach the snap clip to the support collar.
Claim 7
Dependent Claim
18 words
The mounting system according to claim 1 wherein the resilient means is made of a high-temperature alloy metal.
Claim 8
Dependent Claim
17 words
The mounting system according to claim 1 wherein the resilient means is made of a nickel-based superalloy.
Claim 9
Dependent Claim
31 words
The mounting system according to claim 1 wherein the resilient means is made of a nickel-based superalloy having a composition of 15% Cr, 7% Fe, 2.4% Ti and the remainder Nickel.
Claim 10
Dependent Claim
35 words
The mounting system according to claim 2 wherein the upstream end of the combustion chamber wall defines a plurality of generally circular openings arranged in an annular array around the longitudinal axis of the engine.
Claim 11
Dependent Claim
33 words
The mounting system according to claim 9 wherein the studs extend from each locating flange means in a generally radial direction in a plane generally perpendicular to the longitudinal axis of the engine.
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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) | 1994-03-18 | 1994-09-17 | 1995-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-18 | 1998-09-17 | 1999-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-18 | 2002-09-17 | 2003-03-19 | $7700.00 | Window Closed / Lapsed |