US4045955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulating means for gas turbine plant
Assignee: ABB Stal AB
•
Filing: 1976-08-04
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Granted: 1977-09-06
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Expires: 1996-08-04
Abstract
Abstract Apparatus for controlling the flow of fuel supplied via a regulating valve to a gas turbine plant having a compressed-gas generating unit and a power turbine which is driven by the gas from the generating unit. The function of the controlling apparatus is to reduce or cut off the supply of fuel in the event of an overspeed condition of the power turbine. The apparatus includes a first means which is responsive to the angular velocity of a rotor in the power turbine, and a second means which is responsive to the angular acceleration of such rotor. The control means is jointly responsive to the output signals provided by the first and second means so as to control the valve and reduce the rotor's angular velocity when the output signals provided by both the first and second means concurrently exceed predetermined values. According to a further embodiment, a fourth means is also provided which is responsive to the power of the compressed gas generating unit, and the control means is additionally responsive to the output signal provided by such fourth means.
Inventors
- 👤 Roine Brannstrom
- 👤 Goran Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:22
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
Apparatus for controlling the flow of fuel supplied via a regulating valve to a gas turbine plant including a compressed-gas generating unit and a power turbine driven by the gas from the compressed-gas generating unit for the purpose of reducing power turbine speed in the event of overspeed comprising: first means responsive to the angular velocity of a rotor included in said power turbine, second means responsive to the angular acceleration of the power turbine rotor, and third means jointly responsive to output signals provided by said first and second means for controlling said valve to reduce the rotor's angular velocity when said output signals provided by both said first and second means concurrently exceed predetermined values.
Claim 2
Dependent Claim
117 words
Apparatus for controlling the flow of fuel supplied via a regulating valve to a gas turbine plant including a compressed-gas generating unit and a power turbine driven by the gas from the compressed-gas generating unit for the purpose of reducing power turbine speed in the event of overspeed comprising: first means responsive to the angular velocity of a rotor included in said power turbine, second means responsive to the angular acceleration of the power turbine rotor, and third means jointly responsive to output signals provided by said first and second means for controlling said valve to reduce the rotor's angular velocity when said output signals provided by both said first and second means concurrently exceed predetermined values.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 which further includes fourth means responsive to power of said compressed-gas generating unit, said third means being also controlled by the output signal of said fourth means.
Claim 4
Dependent Claim
35 words
The apparatus of claim 2 in which said fourth means is responsive to the rate of fuel flow to said gas unit and provides its said output signal when said rate exceeds a predetermined value.
Claim 5
Dependent Claim
75 words
The apparatus of claim 2 in which the compressed-gas generating unit comprises a compressor driven by a gas turbine and wherein said fourth means is responsive to the angular speed of a further rotor included in said compressed-gas generating unit, said fourth means providing a distinctive output when the time derivative of said angular speed is of a value corresponding to an angular deceleration of said further rotor which is less than a predetermined value.
Claim 6
Dependent Claim
33 words
The apparatus of claim 2 in which said third means is effective to reduce the rotor's angular velocity only when concurrently said output signals of said first, second, and fourth means are present.
Claim 7
Dependent Claim
28 words
The apparatus of claim 2 in which said fourth means is responsive to the rate of fuel flow through a valve supplying fuel to said compressed-gas generating unit.
Claim 8
Dependent Claim
18 words
The apparatus of claim 6 in which said fourth means is responsive to the setting of said valve.
Claim 9
Dependent Claim
25 words
The apparatus of claim 2 in which said fourth means is responsive to the pressure of a combustion chamber included in said compressed-gas generating unit.
Claim 10
Dependent Claim
25 words
The apparatus of claim 2 in which said fourth means is responsive to the temperature in a combustion chamber included in said compressed-gas generating unit.
Claim 11
Dependent Claim
29 words
The apparatus of claim 2 in which said fourth means is responsive to a parameter of the exhaust gases from the gas turbine included in said compressed-gas generating unit.
References Cited (Backward Citations)
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Cited
US3421317A
Cited
US3340883A
Cited
US3759037A
Cited
US3765176A
Cited
US3832846A
Cited
US3874167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |