Patent US4296599A successfully refreshed from Google Patents.
US4296599A
Expired / Lapsed
US
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Turbine cooling air modulation apparatus
Assignee: General Electric Co
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Filing: 1979-03-30
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Granted: 1981-10-27
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Expires: 1999-03-30
Abstract
Abstract The cooling air flowpath for a turbomachine includes a plurality of valves placed in mutually parallel relationship to collectively provide for the modulation of the cooling airflow. Minimum flow requirements are assured while economizing on air to increase efficiency. Any single valve passes only a small portion of the total air so that a valve failure does not appreciably reduce the overall cooling function.
Inventors
- 👤 Arthur P. Adamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:18
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/12; F02C7/16; F02C7/18; F23; F23R; F23R3/00; F23R3/02; F23R3/26; F23R2900/00; F23R2900/00001
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
An improved turbomachine cooling air delivery system of the type having a source of cooling air and an air delivery channel for fluidly connecting the air delivery system to machine components to be cooled, wherein the improvement comprises a plurality of valves disposed in mutually parallel relationship in the air delivery channel and means for automatically operating each of said valves individually in response to predetermined conditions of said cooling air for thereby selectively varying the amount of cooling airflow in said air delivery channel.
Claim 2
Dependent Claim
85 words
An improved turbomachine cooling air delivery system of the type having a source of cooling air and an air delivery channel for fluidly connecting the air delivery system to machine components to be cooled, wherein the improvement comprises a plurality of valves disposed in mutually parallel relationship in the air delivery channel and means for automatically operating each of said valves individually in response to predetermined conditions of said cooling air for thereby selectively varying the amount of cooling airflow in said air delivery channel.
Claim 3
Dependent Claim
27 words
An improved turbomachine cooling air delivery system as set forth in claim 1 wherein said automatic operating means is responsive to the temperature of the cooling air.
Claim 4
Dependent Claim
26 words
An improved turbomachine cooling air delivery system as set forth in claim 1 wherein said automatic operating means is responsive to the speed of the turbomachine.
Claim 5
Dependent Claim
31 words
An improved turbomachine cooling air delivery system as set forth in claim 1 wherein the means for operating said valves includes biasing means for biasing the valves toward a closed position.
Claim 6
Dependent Claim
29 words
An improved turbomachine cooling air delivery system as set forth in claim 2 wherein said automatic operating means includes a bimetal element which moves in response to temperature variations.
Claim 7
Dependent Claim
25 words
An improved turbomachine cooling air delivery system as set forth in claim 3 wherein said automatic operating means includes rotating parts subject to centrifugal forces.
Claim 8
Dependent Claim
38 words
An improved turbomachine cooling air delivery system as set forth in claim 1 wherein each of said valves further includes an opening therein sized for providing a predetermined minimum amount of cooling airflow during all periods of operation.
Claim 9
Dependent Claim
25 words
A cooling air delivery system as set forth in claim 1 wherein said plurality of valves are responsive to the temperature of the cooling air.
Claim 10
Dependent Claim
24 words
A cooling air delivery system as set forth in claim 1 wherein said plurality of valves are responsive to the speed of the turbomachine.
Claim 11
Dependent Claim
25 words
A cooling air delivery system as set forth in claim 1 wherein said plurality of valves are responsive to both temperature and pressure operating parameters.
Claim 12
Dependent Claim
95 words
A cooling air delivery system for a turbomachine comprising: (a) means for producing a flow of cooling air; (b) means for conducting said flow of cooling air to a component to be cooled; (c) an apertured partition disposed in and forming part of said flow conducting means; and (d) a plurality of valves disposed in the apertures for regulating the flow of cooling air therethrough, at least one of said valves including a flap pivotally connected to said partition so as to cover one of said apertures when the valve is in a closed position.
Claim 13
Dependent Claim
95 words
A cooling air delivery system for a turbomachine comprising: (a) means for producing a flow of cooling air; (b) means for conducting said flow of cooling air to a component to be cooled; (c) an apertured partition disposed in and forming part of said flow conducting means; and (d) a plurality of valves disposed in the apertures for regulating the flow of cooling air therethrough, at least one of said valves including a flap pivotally connected to said partition so as to cover one of said apertures when the valve is in a closed position.
Claim 14
Dependent Claim
32 words
A cooling air delivery system as set forth in claim 11 wherein said flap has a hole formed therein for providing a minimum flow of cooling air during all periods of operation.
Claim 15
Dependent Claim
30 words
A cooling air delivery system as set forth in claim 11 wherein each of said valves is individually and automatically operable in response to the pressure of the cooling air.
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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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |