Patent US3729928A successfully refreshed from Google Patents.
US3729928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque control system for a gas turbine
Assignee: General Electric Co
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Filing: 1971-03-26
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Granted: 1973-05-01
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Expires: 1991-03-26
Abstract
Abstract A gas turbine control system has a plurality of closed loop controls, each depending on a different operating parameter and providing a fuel control signal in accordance therewith. A predetermined linear relationship exists among the power output and the output shaft speed at the upper limit of acceptable output torque which is developed. A comparator is employed to compare the predetermined power setting signal applied to the gas turbine and a signal representative of the output shaft speed. Through this comparison it is possible to limit the output torque developed in the transmission components to an acceptable maximum value.
Inventors
- 👤 W Rowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:17
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
In a control system for a gas turbine driving a load at a given speed including a fuel supply means and servo means to control fuel flow through said fuel supply means to a combustion chamber of the gas turbine in accordance with a lowest value gated fuel control signal developed by a plurality of loop control means, each continuously responsive to a different operating parameter of the gas turbine and each arranged to supply a respective fuel control signal to a low value gating means; the combination comprising: means for providing a predetermined power setting signal; means for developing a maximum allowable power signal proportional to the load speed; and an additional loop control means supplying an additional fuel signal to said low value gating means, said additional fuel control signal being representative of the lower of a comparison of said predetermined power setting signal and said maximum allowable power signal, whereby load shaft torque is limited by said additional fuel control signal when it is dependent on the load speed.
Claim 2
Dependent Claim
172 words
In a control system for a gas turbine driving a load at a given speed including a fuel supply means and servo means to control fuel flow through said fuel supply means to a combustion chamber of the gas turbine in accordance with a lowest value gated fuel control signal developed by a plurality of loop control means, each continuously responsive to a different operating parameter of the gas turbine and each arranged to supply a respective fuel control signal to a low value gating means; the combination comprising: means for providing a predetermined power setting signal; means for developing a maximum allowable power signal proportional to the load speed; and an additional loop control means supplying an additional fuel signal to said low value gating means, said additional fuel control signal being representative of the lower of a comparison of said predetermined power setting signal and said maximum allowable power signal, whereby load shaft torque is limited by said additional fuel control signal when it is dependent on the load speed.
Claim 3
Dependent Claim
199 words
A control system for a gas turbine, wherein the gas turbine includes servo means for controlling fuel flow to a combustion chamber of the gas turbine in accordance with a lowest value gated fuel control signal developed by a plurality of loop control means, each responsive to a different operating parameter of the gas turbine and each arranged to supply a respective fuel control signal to a low value gating means; comprising: an additional loop control means for supplying an additional fuel control signal to said low value gating means, said additional loop control means comprising: means for providing a minimum power signal; means for providing a first signal representative of a predetermined power setting; means for developing a second signal proportional to the value of the load speed and indicative of maximum allowable power; means for developing a feedback signal indicative of actual fuel flow; second gating means for comparing said first signal and said second signal, said second gating means providing a third signal representative of the lower of said first and second signal; and summing means for combining said minimum power signal, said third signal and said feedback signal to provide said additional fuel control signal.
Claim 4
Dependent Claim
199 words
A control system for a gas turbine, wherein the gas turbine includes servo means for controlling fuel flow to a combustion chamber of the gas turbine in accordance with a lowest value gated fuel control signal developed by a plurality of loop control means, each responsive to a different operating parameter of the gas turbine and each arranged to supply a respective fuel control signal to a low value gating means; comprising: an additional loop control means for supplying an additional fuel control signal to said low value gating means, said additional loop control means comprising: means for providing a minimum power signal; means for providing a first signal representative of a predetermined power setting; means for developing a second signal proportional to the value of the load speed and indicative of maximum allowable power; means for developing a feedback signal indicative of actual fuel flow; second gating means for comparing said first signal and said second signal, said second gating means providing a third signal representative of the lower of said first and second signal; and summing means for combining said minimum power signal, said third signal and said feedback signal to provide said additional fuel control signal.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |