Patent US4529887A successfully refreshed from Google Patents.
US4529887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid power response turbine
Assignee: General Electric Co
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Filing: 1983-06-20
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Granted: 1985-07-16
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Expires: 2003-06-20
Abstract
Abstract In one form of the invention, means are provided for sensing changes in electrical power demanded from an electrical generator driven by a gas turbine engine. In response, other means change the rate of fuel and air delivery to the engine in proportion to the demand changes and keep the combustor fuel-air ratio substantially constant.
Inventors
- 👤 Kenneth O. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:25
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/18; F02C9/00; F02C9/48; F02C9/50; F02C9/54; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
Apparatus for controlling a gas turbine engine having a gas generator stage for supplying exhaust gases to a power turbine stage which drives an electrical generator, the gas generator stage having variable stators, comprising: (a) sensing means for sensing the frequency of the power produced by the electrical generator and for producing a frequency signal indicative thereof; (b) control means which receives the frequency signal and which, in response, modulates both the fuel supplied to the engine and the variable stators in the engine to maintain combustor fuel-air ratio substantially constant for (i) maintaining gas generator speed substantially constant, and (ii) maintaining electrical generator speed substantially constant.
Claim 2
Dependent Claim
107 words
Apparatus for controlling a gas turbine engine having a gas generator stage for supplying exhaust gases to a power turbine stage which drives an electrical generator, the gas generator stage having variable stators, comprising: (a) sensing means for sensing the frequency of the power produced by the electrical generator and for producing a frequency signal indicative thereof; (b) control means which receives the frequency signal and which, in response, modulates both the fuel supplied to the engine and the variable stators in the engine to maintain combustor fuel-air ratio substantially constant for (i) maintaining gas generator speed substantially constant, and (ii) maintaining electrical generator speed substantially constant.
Claim 3
Dependent Claim
107 words
Apparatus for controlling a gas turbine engine having a gas generation stage for supplying exhaust gases sequentially to a power turbine stage which drives an electrical generator and then to a heat exchanger stage, comprising: (a) sensing means for sensing the frequency of the power produced by the electrical generator and for producing a frequency signal indicative thereof; (b) control means which receives the frequency signal and which, in response, modulates the fuel supplied to the engine while maintaining combustor fuel-air ratio substantially constant for (i) maintaining gas generator speed substantially constant, (ii) maintaining electrical generator speed substantially constant, and (iii) maintaining exhaust gas temperature substantially constant.
Claim 4
Dependent Claim
107 words
Apparatus for controlling a gas turbine engine having a gas generation stage for supplying exhaust gases sequentially to a power turbine stage which drives an electrical generator and then to a heat exchanger stage, comprising: (a) sensing means for sensing the frequency of the power produced by the electrical generator and for producing a frequency signal indicative thereof; (b) control means which receives the frequency signal and which, in response, modulates the fuel supplied to the engine while maintaining combustor fuel-air ratio substantially constant for (i) maintaining gas generator speed substantially constant, (ii) maintaining electrical generator speed substantially constant, and (iii) maintaining exhaust gas temperature substantially constant.
Claim 5
Independent Claim
104 words
A method of controlling a gas turbine engine which has a gas generation stage containing variable stators and supplying exhaust gases to a power turbine stage which drives an electrical generator, comprising the following steps: (a) sensing the speed of the electrical generator; (b) ascertaining a deviation of the speed of (a) from a predetermined speed; (c) in response to the deviation of (b), modulating the variable stators and the fuel supplied to the engine so that (i) the combustor fuel-air ratio remains substantially constant, (ii) the speed of the gas generator stage remains substantially constant, and (iii) the deviation of (b) is reduced.
Claim 6
Independent Claim
104 words
A method of controlling a gas turbine engine which has a gas generation stage containing variable stators and supplying exhaust gases to a power turbine stage which drives an electrical generator, comprising the following steps: (a) sensing the speed of the electrical generator; (b) ascertaining a deviation of the speed of (a) from a predetermined speed; (c) in response to the deviation of (b), modulating the variable stators and the fuel supplied to the engine so that (i) the combustor fuel-air ratio remains substantially constant, (ii) the speed of the gas generator stage remains substantially constant, and (iii) the deviation of (b) is reduced.
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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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |