Patent US2980176A successfully refreshed from Google Patents.
Patent US4615657A successfully refreshed from Google Patents.
US4615657A
Expired / Lapsed
US
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Air storage gas turbine
Assignee: BBC BROWN BOVERI and Co Ltd
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Filing: 1985-05-29
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Granted: 1986-10-07
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Expires: 2005-05-29
Abstract
Abstract An air storage gas turbine which, in the thermal part, comprises: a high pressure turbine with air inlet; a low pressure turbine with a rotor which requires cooling and a vane carrier; one high pressure balance piston and one low pressure balance piston located on a common shaft for the high pressure turbine and the low pressure turbine, respectively; and an impulse turbine being connected between the air inlet of the high pressure turbine and the consumers of low pressure auxiliary air.
Inventors
- 👤 Franz Kreitmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:47
CPC Classifications
F; F01; F01D; F01D3/00; F01D3/04; F02; F02C; F02C6/00; F02C6/14; F02C6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
In an air storage gas turbine of the type including: a high pressure turbine with an air inlet; a low pressure turbine utilizing low pressure air for cooling; and a high pressure balance piston and a low pressure balance piston, located on a common shaft for the high pressure turbine and the low pressure turbine, respectively; the improvement comprising an impulse turbine having an inlet and an outlet, first means for communicating said impulse turbine inlet with the air inlet of the high pressure turbine and second means for communicating said impulse turbine outlet with the low pressure balance piston and parts of the low pressure turbine.
Claim 2
Dependent Claim
107 words
In an air storage gas turbine of the type including: a high pressure turbine with an air inlet; a low pressure turbine utilizing low pressure air for cooling; and a high pressure balance piston and a low pressure balance piston, located on a common shaft for the high pressure turbine and the low pressure turbine, respectively; the improvement comprising an impulse turbine having an inlet and an outlet, first means for communicating said impulse turbine inlet with the air inlet of the high pressure turbine and second means for communicating said impulse turbine outlet with the low pressure balance piston and parts of the low pressure turbine.
Claim 3
Dependent Claim
25 words
The gas turbine according to claim 1, wherein the impulse turbine includes a Curtis stage with two guide vane rows and two rotor blade rows.
Claim 4
Dependent Claim
27 words
The gas turbine according to claim 1, wherein the impulse turbine is located on the common shaft of the high pressure turbine and the low pressure turbine.
Claim 5
Dependent Claim
25 words
The gas turbine according to claim 3, wherein the impulse turbine is located between the high pressure balance piston and the low pressure balance piston.
Claim 6
Dependent Claim
61 words
The gas turbine according to claim 1, further comprising means for communicating an inlet side of the high pressure balance piston with a high pressure intermediate space of the high pressure turbine and third means for communicating an outlet of the high pressure balance piston with said second communicating means, said second communicating means including a low pressure auxiliary air line.
Claim 7
Dependent Claim
19 words
The gas turbine according to claim 5, wherein said third communicating means includes a bypass around the impulse turbine.
Claim 8
Dependent Claim
52 words
The gas turbine according to claim 5, further comprising a passage which communicates the first communicating means with the low pressure auxiliary air line so as to bypass the impulse turbine, a first temperature-controlled valve being located in the first communicating means and a second temperature-controlled valve being located in the passage.
Claim 9
Independent Claim
145 words
A method of providing low pressure auxiliary air during operation of an air storage gas turbine of the type including a high pressure turbine with an air inlet, a low pressure turbine utilizing low pressure air for cooling, a high pressure balance piston and a low pressure balance piston located on a common shaft for the high pressure turbine and the low pressure turbine, respectively, said method comprising the steps of delivering a branched off part of heated high pressure main air from the air inlet of the high pressure turbine to an impulse turbine, expanding the delivered air in the impulse turbine to the condition required for low pressure auxiliary air while giving up energy to the common shaft and supplying the expanded air through a low pressure auxiliary air line to the low pressure balance piston and parts of the low pressure turbine.
Claim 10
Independent Claim
145 words
A method of providing low pressure auxiliary air during operation of an air storage gas turbine of the type including a high pressure turbine with an air inlet, a low pressure turbine utilizing low pressure air for cooling, a high pressure balance piston and a low pressure balance piston located on a common shaft for the high pressure turbine and the low pressure turbine, respectively, said method comprising the steps of delivering a branched off part of heated high pressure main air from the air inlet of the high pressure turbine to an impulse turbine, expanding the delivered air in the impulse turbine to the condition required for low pressure auxiliary air while giving up energy to the common shaft and supplying the expanded air through a low pressure auxiliary air line to the low pressure balance piston and parts of the low pressure turbine.
Claim 11
Dependent Claim
56 words
The method according to claim 8, further comprising the step of: during starting of the air storage gas turbine, interrupting the delivery of the branched-off main air to the impulse turbine by closing a first temperature-controlled valve and delivering the branched-off main air to the low pressure auxiliary air line by opening a second temperature-controlled valve.
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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |