Patent US3096714A successfully refreshed from Google Patents.
US3800530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled augmenter igniter assembly
Assignee: General Electric Co
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Filing: 1972-02-17
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Granted: 1974-04-02
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Expires: 1992-02-17
Abstract
Abstract An augmenter igniter assembly for a mixed flow augmenter gas turbine engine is shown to include an airfoil-shaped, hollow housing which surrounds an electrical discharge-type igniter and provides a cooling air flowpath therearound. A high velocity, cooling air flowpath is provided in the region of the critical igniter tip, and antiflameholding air is ejected from the downstream end of the housing to locally cool this region and to reduce the wake downstream of the housing. Mounting means are shown which permit removal of the igniter and its associated electrical lead without the necessity of removing the housing from the engine casing. The mounting means also spring-loads the igniter tip into its desired position at the base of the housing and further provides means for allowing selective movement of the housing with respect to other augmenter components during augmenter operation.
Inventors
- 👤 D Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:00
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; F02C7/264; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F23R3/18; F23R3/20
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
185 words
An augmenter igniter assembly for a gas turbine engine having an engine casing associated therewith, said engine casing comprising an outer liner and an inner wall portion; a relatively hot gas stream flowing within said inner wall portion, and a relatively cool gas stream flowing between said liner and said inner wall portion; and means for injecting fuel into said hot gas stream; said assembly comprising a hollow housing including a first part adapted to extend into said hot gas stream associated with said engine, a second part adapted to extend into said relatively cool gas stream associated with said engine, an electrical discharge-type igniter adapted to be positioned within said housing, means for delivering cooling air to the interior of said housing to cool said igniter, and said housing including means for exhausting at least a portion of said cooling air along substantially the entire length of said first part of said housing as antiflameholding air said cooling air exhausting means comprising a plurality of holes spaced along substantially the entire length and proximate the trailing edge of said first part of said housing.
Claim 2
Dependent Claim
185 words
An augmenter igniter assembly for a gas turbine engine having an engine casing associated therewith, said engine casing comprising an outer liner and an inner wall portion; a relatively hot gas stream flowing within said inner wall portion, and a relatively cool gas stream flowing between said liner and said inner wall portion; and means for injecting fuel into said hot gas stream; said assembly comprising a hollow housing including a first part adapted to extend into said hot gas stream associated with said engine, a second part adapted to extend into said relatively cool gas stream associated with said engine, an electrical discharge-type igniter adapted to be positioned within said housing, means for delivering cooling air to the interior of said housing to cool said igniter, and said housing including means for exhausting at least a portion of said cooling air along substantially the entire length of said first part of said housing as antiflameholding air said cooling air exhausting means comprising a plurality of holes spaced along substantially the entire length and proximate the trailing edge of said first part of said housing.
Claim 3
Dependent Claim
86 words
The igniter assembly recited in claim 1 further including means for mounting said housing to said engine casing, said mounting means including a spherical bushing permitting partial rotation of said housing with respect to the engine casing, said mounting means further including means for removably connecting said igniter to said housing, said connecting means including a threaded opening in said bushing for receiving said igniter thereby enabling the removal of said igniter from said housing without the necessity of removing said housing from the engine casing.
Claim 4
Dependent Claim
29 words
The igniter assembly recited in claim 2 wherein said housing includes a base portion and said base portion includes an opening for receiving a tip portion of said igniter.
Claim 5
Dependent Claim
28 words
The igniter assembly recited in claim 3 wherein said igniter connecting means further includes means for spring-loading said igniter tip portion against said base portion of said housing.
Claim 6
Dependent Claim
49 words
The igniter assembly recited in claim 1 wherein saiD housing includes an outer shell member and an inner member, said shell member and said inner member cooperating to define a plurality of radial cooling paths within said housing, said outershell member having said plurality of exit holes located therein.
Claim 7
Dependent Claim
37 words
The igniter assembly recited in claim 5 wherein said inner member includes a collar near the bottom thereof for receiving said igniter tip portion, said collar defining a high velocity cooling path around said igniter tip portion.
Claim 8
Dependent Claim
88 words
The augmenter igniter assembly recited in claim 6 wherein said outer shell member has a generally symmetrical airfoil-shaped cross section and said means for delivering cooling air include first air inlet means in said shell member near the leading edge thereof adapted to deliver cooling air to a first of said radial cooling paths and second air inlet means in said shell member near the trailing edge thereof adapted to deliver cooling air to a second of said radial cooling paths and thereafter to said antiflameholding exit holes.
Claim 9
Dependent Claim
37 words
The igniter assembly recited in claim 7 further including means for mounting said housing to an engine casing, said mounting means including a spherical bushing permitting partial rotation of said housing with respect to the engine casing.
Claim 10
Dependent Claim
49 words
The igniter assembly recited in claim 8 further characterized in that said housing includes a base portion, which includes an opening for receiving a tip portion of said igniter, and said mounting means further includes means for spring-loading said igniter tip portion against said base portion of said housing.
Claim 11
Dependent Claim
45 words
The igniter assembly recited in claim 9 wherein said mounting means further includes means for removably connecting said igniter to said housing, said connecting means enabling the removal of said igniter from said housing without the necessity of removing said housing from the engine casing.
Claim 12
Dependent Claim
63 words
The igniter assembly recited in claim 10 wherein said connecting means includes a hollow nut, said spherical bushing includes a threaded opening for receiving said nut, said igniter includes an electrical lead extending from said igniter through said hollow nut, and said spring-loading means includes a collar rigidly connected to said igniter lead and a spring located between said nut and said collar.
Claim 13
Dependent Claim
54 words
The igniter assembly recited in claim 11 in combination with an augmented gas turbine engine, said engine including a compressor, a primary combustion system, a turbine and an augmenter combustion system, said augmenter combustion system including a flameholder, and said flameholder including an opening therein for slideably receiving said base portion of said housing.
Claim 14
Dependent Claim
108 words
A mounting assembly for a gas turbine engine augmenter igniter, which includes an electrical spark-type igniter tip, and a hollow housing surrounding said igniter and igniter tip and defining a cooling flow path therearound, said mounting assembly including means for mounting said housing to an engine casing, said mounting means including a spherical bushing permitting slight rotation of said housing with respect to the engine casing, and means for removably connecting said igniter to said housing, said connecting means including a threaded opening within said spherical bushing thereby enabling the removal of said igniter from said housing without the necessity of removing said housing from the engine casing.
Claim 15
Dependent Claim
108 words
A mounting assembly for a gas turbine engine augmenter igniter, which includes an electrical spark-type igniter tip, and a hollow housing surrounding said igniter and igniter tip and defining a cooling flow path therearound, said mounting assembly including means for mounting said housing to an engine casing, said mounting means including a spherical bushing permitting slight rotation of said housing with respect to the engine casing, and means for removably connecting said igniter to said housing, said connecting means including a threaded opening within said spherical bushing thereby enabling the removal of said igniter from said housing without the necessity of removing said housing from the engine casing.
Claim 16
Dependent Claim
44 words
The mounting assembly recited in claim 13 wherein said housing includes a base portion and said base portion includes an opening for receiving said igniter tip and said mounting means includes means for spring-loading said igniter tip against said base portion of said housing.
Claim 17
Dependent Claim
23 words
The mounting assembly recited in claim 14 wherein said connecting means includes a hollow nut and said threaded opening receives said hollow nut.
Claim 18
Dependent Claim
60 words
The mounting assembly recited in claim 15 wherein said spring-loading means includes a collar rigidly connected to said igniter lead and a spring located between said nut and said coLlar, said igniter further including pilot fuel delivery tubing adapted to be positioned within said housing, and said mounting assembly includes means for removably connecting said tubing to said spherical bushing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |