Patent US3832893A successfully refreshed from Google Patents.
US3832893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for indicating or controlling load changes in steam or gas turbines
Assignee: Kraftwerk Union AG
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Filing: 1972-10-16
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Granted: 1974-09-03
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Expires: 1992-10-16
Abstract
Abstract A device for indicating or controlling the respective permissible limits of intended load changes of a gas or steam turbine is operable to limit the speed of load changes for the steam or gas turbines. In operation a time-temperature curve representing the average integral temperature in the turbine shaft relative to time is derived from a continually measured temperature, such measured temperature corresponding to the variable surface temperature of the turbine shaft.
Inventors
- 👤 H Dlugos
- 👤 F Zerrmayr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:54
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/56; F; F01; F01D; F01D17/00; F01D17/02; F01D17/08; F01D17/085
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
A device for indicating or controlling permissible limits of load changes of a gas or steam turbine, said turbine having a shaft operating with a constant or alternating load, comprising means for measuring a temperature which corresponds to the internal temperature of said shaft, and computer means receiving said measured temperature and producing an output corresponding to the time-temperature curve of the average integral temperature of said shaft, wherein said computer means is an electronic analog computer, said computer being operable to compute the temperature integrally determined across the cross section of said shaft.
Claim 2
Independent Claim
94 words
A device for indicating or controlling permissible limits of load changes of a gas or steam turbine, said turbine having a shaft operating with a constant or alternating load, comprising means for measuring a temperature which corresponds to the internal temperature of said shaft, and computer means receiving said measured temperature and producing an output corresponding to the time-temperature curve of the average integral temperature of said shaft, wherein said computer means is an electronic analog computer, said computer being operable to compute the temperature integrally determined across the cross section of said shaft.
Claim 3
Independent Claim
119 words
A device for indicating or controlling permissible limits of load changes of a gas or steam turbine, said turbine having a shaft operating with a constant or alternating load, comprising means for measuring a temperature which corresponds to the internal temperature of said shaft, and computer means receiving said measured temperature and producing an output corresponding to the time-temperature curve of the average integral temperature of said shaft, wherein said temperature measuring means measures the temperature in the interior of the housing through which said shaft passes, said measured temperature corresponding to the temperature of the shaft, and wherein the difference between said measured temperature and said computed temperature is determinative of the thermal stress conditions of said shaft.
Claim 4
Independent Claim
119 words
A device for indicating or controlling permissible limits of load changes of a gas or steam turbine, said turbine having a shaft operating with a constant or alternating load, comprising means for measuring a temperature which corresponds to the internal temperature of said shaft, and computer means receiving said measured temperature and producing an output corresponding to the time-temperature curve of the average integral temperature of said shaft, wherein said temperature measuring means measures the temperature in the interior of the housing through which said shaft passes, said measured temperature corresponding to the temperature of the shaft, and wherein the difference between said measured temperature and said computed temperature is determinative of the thermal stress conditions of said shaft.
Claim 5
Independent Claim
99 words
A method for indicating or controlling permissible load changes of a gas or steam turbine, said turbine having a shaft operating with a constant or alternating load, comprising the steps of measuring a temperature which corresponds to the internal temperature of said shaft, utilizing said temperature as an input to a computing device, and producing an output from said computer device corresponding to the time-temperature curve of the average integral temperature of said shaft, and determining the difference between said measured temperature and said computed temperature, and utilizing said difference to determinE the thermal stress conditions of said shaft.
Claim 6
Independent Claim
99 words
A method for indicating or controlling permissible load changes of a gas or steam turbine, said turbine having a shaft operating with a constant or alternating load, comprising the steps of measuring a temperature which corresponds to the internal temperature of said shaft, utilizing said temperature as an input to a computing device, and producing an output from said computer device corresponding to the time-temperature curve of the average integral temperature of said shaft, and determining the difference between said measured temperature and said computed temperature, and utilizing said difference to determinE the thermal stress conditions of said shaft.
Claim 7
Dependent Claim
19 words
A method according to claim 3, comprising continuously measuring said temperature which corresponds to the temperature of said shaft.
Claim 8
Dependent Claim
19 words
A method according to claim 3, comprising intermittently measuring said temperature which corresponds to the temperature of said shaft.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |