EP1847688B1 - Emergency shutdown detection system for a gas turbine - Google Patents

Emergency shutdown detection system for a gas turbine Download PDF

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Publication number
EP1847688B1
EP1847688B1 EP07004819.4A EP07004819A EP1847688B1 EP 1847688 B1 EP1847688 B1 EP 1847688B1 EP 07004819 A EP07004819 A EP 07004819A EP 1847688 B1 EP1847688 B1 EP 1847688B1
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EP
European Patent Office
Prior art keywords
sensor element
resistors
gas turbine
line
emergency shutdown
Prior art date
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Expired - Fee Related
Application number
EP07004819.4A
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German (de)
French (fr)
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EP1847688A3 (en
EP1847688A2 (en
Inventor
Gustavo Argüello
Clemens Chaskel
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Rolls Royce Deutschland Ltd and Co KG
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Rolls Royce Deutschland Ltd and Co KG
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Publication of EP1847688A3 publication Critical patent/EP1847688A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
    • F01D21/06—Shutting-down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/02—Arrangement of sensing elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
    • F01D21/045—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position special arrangements in stators or in rotors dealing with breaking-off of part of rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/32—Application in turbines in gas turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/80—Diagnostics

Definitions

  • the invention relates to a Notabschaltdetektorvortechnische for a gas turbine, in particular for a Notabschaltdetektorvortechnische, which responds to a shaft fracture of a gas turbine to interrupt the fuel supply in such an emergency or to control the turbine control accordingly.
  • the DE 197 27 296 A1 shows switching elements which are actuated by an axial displacement of a broken shaft.
  • the invention has for its object to provide a Notabschaltdetektorvortechnische for a gas turbine, which has a high level of reliability with a simple design and simple, cost-effective manufacturability.
  • the emergency shutdown detector device is based on the basic idea by means of at least one resistor To provide a circuit which not only has an infinitely large or infinitely small electrical resistance (depending on whether an electrical line is interrupted or has contact), but which has a defined electrical resistance, which allows a definitive statement about whether a there is another electrical defect of the emergency shutdown detector device, the sensor element or the associated control, or whether a shaft break has occurred in which the sensor element has been mechanically severed.
  • the controller can easily see that there is no break in the shaft and thus no separation of the free end region of the sensor element. If the supply lines are interrupted, for example due to contact difficulties or other defects, an infinite resistance would result. This too can not be an indication of a wave breakage.
  • the inventive design is thus ensured that there is a defined resistance in the overall circuit, which can only occur when a shaft break occurs and according to the free end of the sensor element is separated or sheared off.
  • Other disturbances for example, a short circuit in the region of the sensor element, lead to changed resistance values, which specifically correspond to the resistors used and thus can be detected by the controller.
  • the embodiment according to the invention also has the advantage that, given temperature changes in the region of the resistors, which may occur, for example, in a range from -55 ° C. to + 260 ° C., a defined mode of operation results. Since the resistivity values of the individual resistors change proportionally to each other during such temperature changes, the specific proportionality or assignment of resistance values described above with different malfunctions or with an actual shaft breakage is still present. In particular when using resistors with standardized temperature coefficients, the device according to the invention thus has the highest degree of operational safety.
  • the Fig. 1 shows a schematic representation of a portion of a gas turbine in section.
  • a sensor element 5 is shown, which is designed in the form of an elongated sensor and has a connection region 6, which can be mounted in the usual way.
  • a separating projection 12 is formed, which is axially displaced at a shaft break and by engaging in the grooves 10, 11 comes into contact with the free end 7 of the sensor element 5 and the tip region separates or shears.
  • the shearing occurs in the area of one in the 3 and 4 schematically shown dividing line 13th
  • the Fig. 3 shows a schematic representation of the electrical circuit of Notabschaltdetektorvoroplasty invention. This includes an already mentioned connection area 6, which is connected via not shown electrical connection elements with a control / regulation. At the connection region 6, the sensor element 5 is fixed, the free end 7 along the dividing line 13 is separable.
  • the two supply lines 3, 4 are electrically connected via a resistor R1.
  • the supply lines 1, 3 are electrically connected via a second electrical resistance R2.
  • the resistors R1 and R2 are arranged in parallel.
  • a resistor R3 is further arranged in series.
  • the embodiment of Fig. 4 differs from the embodiment of Fig. 3 in that the resistor R1 is likewise arranged adjacent to the connection region 6, so that both the supply line 3 and the discharge line 4 each run in a loop like the free end 7 of the sensor element 5. This arrangement is chosen so that all three resistors same thermal Environment have. This results in a further increase in reliability.
  • the reference numeral 14 designates a flange which may be provided for mounting the emergency shutdown detector device or the connection region 6.
  • the total resistance is 1499 ⁇ .
  • an interruption of one of the lines 3 and 4 in the sensor element 5 and in the free end 7 results in a resistance of 2518 ⁇ .
  • a short circuit between the lines 3, 4 results in a resistance of 769 ⁇ .
  • a short circuit between lines 1 and 2 results in a very low resistance ( ⁇ 13 ⁇ ). If one of the lines 1 or 2 breaks, an infinite resistance results.

Description

Die Erfindung bezieht sich auf eine Notabschaltdetektorvorrichtung für eine Gasturbine, insbesondere für eine Notabschaltdetektorvorrichtung, welche auf einen Wellenbruch einer Gasturbine reagiert, um in einem derartigen Notfall die Brennstoffzufuhr zu unterbrechen bzw. die Turbinensteuerung entsprechend anzusteuern.The invention relates to a Notabschaltdetektorvorrichtung for a gas turbine, in particular for a Notabschaltdetektorvorrichtung, which responds to a shaft fracture of a gas turbine to interrupt the fuel supply in such an emergency or to control the turbine control accordingly.

Aus dem Stand der Technik sind unterschiedlichste Ausgestaltungsvarianten bekannt, die teils mechanische teils elektromechanisch funktionieren, siehe insbesondere die US-Patente 6,607,349 B2 , 5,293,774 , 4,737,709 und 3,61 2,710 oder die DE 197 27 296 A1 . Bei diesen vorbekannten Vorrichtungen besteht das Problem, dass bei einem Bruch einer Kabelverbindung oder bei Kontaktschwierigkeiten der Notabschaltdetektorvorrichtung selbst ein Störfall vorgetauscht werden kann, der jedoch nicht vorliegt, da kein Wellenbruch aufgetreten ist und das eigentliche Sensorelement nicht durchtrennt wurde.A great variety of design variants are known from the state of the art, some of which are mechanical and partly electromechanical, in particular see FIGS U.S. Patents 6,607,349 B2 . 5,293,774 . 4,737,709 and 3.61 2,710 or the DE 197 27 296 A1 , In these prior art devices there is the problem that in case of breakage of a cable connection or contact difficulties of emergency shutdown device itself an accident can be exchanged, but this is not present because no shaft break occurred and the actual sensor element was not severed.

Erschwerend kommt hinzu, dass sich beim Betrieb einer Gasturbine ganz erhebliche Temperaturunterschiede ergeben können, so dass auch hierdurch Fehlfunktionen der vorbekannten Vorrichtungen nicht auszuschließen sind.To make matters worse, that can result in the operation of a gas turbine quite significant temperature differences, so that this malfunction of the prior art devices can not be excluded.

Aus der US 6 607 349 B2 ist eine Notabschaltdetektorvorrichtung einer Gasturbine vorbekannt, bei welcher Zuleitungen und Ableitungen an ihren distalen Endbereichen über eine aufbrechbare Verbindung verbunden sind. Mittels nicht im Einzelnen beschriebener Ermittlungs- und Testelemente sowie einer Recheneinheit soll auf einen Wellenbruch rückgeschlossen werden können.From the US Pat. No. 6,607,349 B2 For example, an emergency shutdown detector device of a gas turbine is previously known in which leads and leads are connected at their distal end regions via a rupturable connection. By means not described in detail investigation and test elements and a computing unit should be able to draw conclusions about a wave break.

Die DE 197 27 296 A1 zeigt Schaltelemente, welche durch eine axiale Verschiebung einer gebrochenen Welle betätigt werden.The DE 197 27 296 A1 shows switching elements which are actuated by an axial displacement of a broken shaft.

Der Erfindung liegt die Aufgabe zugrunde, eine Notabschaltdetektorvorrichtung für eine Gasturbine zu schaffen, welche bei einfachem Aufbau und einfacher, kostengünstiger Herstellbarkeit ein Höchstmaß an Betriebssicherheit aufweist.The invention has for its object to provide a Notabschaltdetektorvorrichtung for a gas turbine, which has a high level of reliability with a simple design and simple, cost-effective manufacturability.

Erfindungsgemäß wird die Aufgabe durch die Merkmalskombination des Hauptanspruchs gelöst, die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung.According to the invention the object is achieved by the feature combination of the main claim, the subclaims show further advantageous embodiments of the invention.

Der erfindungsgemäßen Notabschaltdetektorvorrichtung liegt der Grundgedanke zugrunde, mittels zumindest eines Widerstandes
eine Schaltung zu schaffen, welche nicht nur einen unendlich großen oder unendlich kleinen elektrischen Widerstand aufweist (in Abhängigkeit davon, ob eine elektrische Leitung unterbrochen ist oder Kontakt hat), sondern welche einen definierten elektrischen Widerstand hat, der eine definitive Aussage darüber zulässt, ob ein sonstiger elektrischer Defekt der Notabschaltdetektorvorrichtung, des Sensorelements oder der zugehörigen Steuerung vorliegt oder ob ein Wellenbruch aufgetreten ist, bei welchem das Sensorelement mechanisch durchtrennt wurde.The emergency shutdown detector device according to the invention is based on the basic idea by means of at least one resistor
To provide a circuit which not only has an infinitely large or infinitely small electrical resistance (depending on whether an electrical line is interrupted or has contact), but which has a defined electrical resistance, which allows a definitive statement about whether a there is another electrical defect of the emergency shutdown detector device, the sensor element or the associated control, or whether a shaft break has occurred in which the sensor element has been mechanically severed.

Bei einem Wellenbruch bewegt sich die Welle in axialer Richtung über einen gewissen Bereich, beispielsweise über 5 mm. Mittels geeigneter Zähne oder Schermesser, die in Kontakt mit dem mechanisch durchtrennbaren Sensorelement geraten, wenn die Welle gebrochen ist, kann dieses abgetrennt werden. Bei der erfindungsgemäßen Ausgestaltung, insbesondere bei der Verwendung der in den Unteransprüchen beschriebenen drei Widerstände und der zugehörigen Schaltung wird somit ein Widerstand gezielt aus der Gesamtschaltung abgetrennt. Somit sind nur noch die beiden anderen Widerstände wirksam. Hierdurch ändert sich der Gesamtwiderstand in definierter Weise. Diese Widerstandsänderung ist steuerungsmäßig vorgebbar und regelungstechnisch überprüfbar. Sollte jedoch ein Kurzschluss innerhalb der elektrischen Leitung oder im Bereich von Zuleitungen etc. vorliegen, so ändert sich der elektrische Widerstand auf Null. Die Steuerung kann hierdurch leicht ersehen, dass kein Wellenbruch und damit kein Abtrennen des freien Endbereichs des Sensorelements vorliegen. Sollten die Zuleitungen, beispielsweise durch Kontaktschwierigkeiten oder sonstige Defekte unterbrochen sein, so würde sich ein unendlicher Widerstand ergeben. Auch dieser kann kein Indiz für einen Wellenbruch darstellen.When a shaft breaks, the shaft moves in the axial direction over a certain range, for example, over 5 mm. By means of suitable teeth or blades, which come into contact with the mechanically severable sensor element when the shaft is broken, this can be separated. In the embodiment according to the invention, in particular when using the three resistors and the associated circuit described in the subclaims, a resistor is thus purposefully separated from the overall circuit. Thus, only the other two resistors are effective. As a result, the total resistance changes in a defined manner. This change in resistance can be specified in terms of control and can be checked in terms of control engineering. However, should a short circuit exist within the electrical line or in the range of supply lines, etc., then the electrical resistance changes to zero. As a result, the controller can easily see that there is no break in the shaft and thus no separation of the free end region of the sensor element. If the supply lines are interrupted, for example due to contact difficulties or other defects, an infinite resistance would result. This too can not be an indication of a wave breakage.

Durch die erfindungsgemäße Ausgestaltung ist somit sichergestellt, dass sich ein definierter Widerstand in der Gesamtschaltung ergibt, der nur dann auftreten kann, wenn ein Wellenbruch auftritt und entsprechend das freie Ende des Sensorelements abgetrennt oder abgeschert wird. Andere Störungen, beispielsweise auch ein Kurzschluss im Bereich des Sensorelements, führen zu geänderten Widerstandswerten, welche spezifisch den eingesetzten Widerständen entsprechen und somit von der Steuerung erfasst werden können.The inventive design is thus ensured that there is a defined resistance in the overall circuit, which can only occur when a shaft break occurs and according to the free end of the sensor element is separated or sheared off. Other disturbances, for example, a short circuit in the region of the sensor element, lead to changed resistance values, which specifically correspond to the resistors used and thus can be detected by the controller.

Die erfindungsgemäße Ausgestaltung weist auch den Vorteil auf, dass sich bei Temperaturänderungen im Bereich der Widerstände, welche beispielsweise in einem Bereich von -55°C bis +260°C auftreten können, eine definierte Betriebsweise ergibt. Da bei derartigen Temperaturänderungen sich die spezifischen Widerstandswerte der einzelnen Widerstände proportional zueinander ändern, ist die eingangs beschriebene spezifische Proportionalität oder Zuordnung von Widerstandswerten bei unterschiedlichen Funktionsstörungen oder bei einem tatsächlichen Wellenbruch weiterhin gegeben. Insbesondere bei Verwendung von Widerständen mit standardisierten Temperaturkoeffizienten weist somit die erfindungsgemäße Vorrichtung ein Höchstmaß an Betriebssicherheit auf.The embodiment according to the invention also has the advantage that, given temperature changes in the region of the resistors, which may occur, for example, in a range from -55 ° C. to + 260 ° C., a defined mode of operation results. Since the resistivity values of the individual resistors change proportionally to each other during such temperature changes, the specific proportionality or assignment of resistance values described above with different malfunctions or with an actual shaft breakage is still present. In particular when using resistors with standardized temperature coefficients, the device according to the invention thus has the highest degree of operational safety.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:

Fig. 1
eine schematische Gesamtanordnung der erfindungsgemäßen Notabschaltdetektorvorrichtung mit dem Sensor-element,
Fig. 2
eine vergrößerte Explosionsansicht einer Halterung des freien Endbereichs des Sensorelements,
Fig. 3
eine vereinfachte Darstellung der erfindungsgemäßen Schaltung, und
Fig. 4
ein weiteres Ausführungsbeispiel der erfindungsgemäßen Anordnung.
In the following the invention will be described by means of an embodiment in conjunction with the drawing. Showing:
Fig. 1
a schematic overall arrangement of emergency shutdown detector device according to the invention with the sensor element,
Fig. 2
an enlarged exploded view of a holder of the free end portion of the sensor element,
Fig. 3
a simplified representation of the circuit according to the invention, and
Fig. 4
a further embodiment of the arrangement according to the invention.

Die Fig. 1 zeigt in schematischer Darstellung einen Teilbereich einer Gasturbine im Schnitt. Dabei ist ein Sensorelement 5 dargestellt, welches in Form eines länglichen Sensors ausgebildet ist und einen Anschlussbereich 6 aufweist, der in üblicher Weise montierbar ist.The Fig. 1 shows a schematic representation of a portion of a gas turbine in section. In this case, a sensor element 5 is shown, which is designed in the form of an elongated sensor and has a connection region 6, which can be mounted in the usual way.

Wie sich aus der Zusammenschau der Fig. 1 und 2 ergibt, ist das freie Ende 7 des Sensorelements 5 U-förmig gebogen und in eine Halterung 8 aufgenommen und mittels einer Abdeckung 9 gesichert. Die Halterung 8 umfasst eine Nut 10, welche im montierten Zustand mit einer Nut 11 der Abdeckung 9 fluchtet, so wie sich dies aus Fig. 1 ergibt. Im Bereich der Turbine ist ein Trennvorsprung 12 ausgebildet, welcher bei einem Wellenbruch axial verschoben wird und durch Eingreifen in die Nuten 10, 11 in Kontakt mit dem freien Ende 7 des Sensorelements 5 gelangt und dessen Spitzenbereich abtrennt oder abschert. Die Abscherung erfolgt im Bereich einer in den Fig. 3 und 4 schematisch dargestellten Trennlinie 13.As can be seen from the synopsis of Fig. 1 and 2 results, the free end 7 of the sensor element 5 is bent in a U-shape and received in a holder 8 and secured by a cover 9. The holder 8 comprises a groove 10, which in the mounted state is aligned with a groove 11 of the cover 9, as it turns out Fig. 1 results. In the region of the turbine, a separating projection 12 is formed, which is axially displaced at a shaft break and by engaging in the grooves 10, 11 comes into contact with the free end 7 of the sensor element 5 and the tip region separates or shears. The shearing occurs in the area of one in the 3 and 4 schematically shown dividing line 13th

Die Fig. 3 zeigt in schematischer Darstellung die elektrische Schaltung der erfindungsgemäßen Notabschaltdetektorvorrichtung. Diese umfasst einen bereits erwähnten Anschlussbereich 6, welcher über nicht dargestellte elektrische Verbindungselemente mit einer Regelung/Steuerung verbunden ist. An dem Anschlussbereich 6 ist das Sensorelement 5 befestigt, dessen freies Ende 7 längs der Trennlinie 13 abtrennbar ist.The Fig. 3 shows a schematic representation of the electrical circuit of Notabschaltdetektorvorrichtung invention. This includes an already mentioned connection area 6, which is connected via not shown electrical connection elements with a control / regulation. At the connection region 6, the sensor element 5 is fixed, the free end 7 along the dividing line 13 is separable.

Im Inneren des Sensorelements 5 verlaufen jeweils eine elektrische Zuleitung 1, 3 sowie eine elektrische Ableitung 2, 4. Im Bereich des freien Endes 7 sind die beiden Zulaufleitungen 3, 4 über einen Widerstand R1 elektrisch verbunden. Im oberen Bereich des Sensorelements 5, angrenzend an den Anschlussbereich 6, sind die Zuleitungen 1, 3 mit den Ableitungen 2, 4 über einen zweiten elektrischen Widerstand R2 verbunden. Die Widerstände R1 und R2 sind parallel angeordnet. In der Zuleitung 1 ist weiterhin ein Widerstand R3 in Reihe angeordnet. Das Ausführungsbeispiel der Fig. 4 unterscheidet sich von dem Ausführungsbeispiel der Fig. 3 dadurch, dass der Widerstand R1 ebenfalls benachbart zu dem Anschlussbereich 6 angeordnet ist, so dass sowohl die Zuführleitung 3 als auch die Abführleitung 4 jeweils schlaufenartig auch das freie Ende 7 des Sensorelements 5 durchlaufen.Diese Anordnung ist so gewählt, dass alle drei Widerstände gleiche thermische Umgebung haben. Hierdurch ergibt sich eine weitere Steigerung der Betriebssicherheit. Das Bezugszeichen 14 bezeichnet einen Flansch, der zur Befestigung der Notabschaltdetektorvorrichtung bzw. des Anschlussbereichs 6 vorgesehen sein kann.In the interior of the sensor element 5 are each an electrical lead 1, 3 and an electrical outlet 2, 4. In the region of the free end 7, the two supply lines 3, 4 are electrically connected via a resistor R1. In the upper region of the sensor element 5, adjacent to the connection region 6, are the supply lines 1, 3 with the leads 2, 4 connected via a second electrical resistance R2. The resistors R1 and R2 are arranged in parallel. In the feed line 1, a resistor R3 is further arranged in series. The embodiment of Fig. 4 differs from the embodiment of Fig. 3 in that the resistor R1 is likewise arranged adjacent to the connection region 6, so that both the supply line 3 and the discharge line 4 each run in a loop like the free end 7 of the sensor element 5. This arrangement is chosen so that all three resistors same thermal Environment have. This results in a further increase in reliability. The reference numeral 14 designates a flange which may be provided for mounting the emergency shutdown detector device or the connection region 6.

Die Widerstandswerte betragen bei den gezeigten Ausführungsbeispielen:

  • R1: 1250 Ω,
  • R2: 1750 Ω,
  • R3: 750 Ω.
The resistance values in the embodiments shown are as follows:
  • R1: 1250 Ω,
  • R2: 1750 Ω,
  • R3: 750 Ω.

Diese Widerstandswerte wurden unter der Annahme gewählt, dass der Widerstand-Messbereich des Messgerätes limitiert auf 3000 Ohm maximal mit einer genauigkeit von +/- 150 Ohm ist. Durch die oben aufgeführten Widerstände ergeben sich nahezu equidistante Widerstandswerte im Bereich des genannten Messbereiches, um eine bessere Unterscheidung der verschiedenen Fehlerkonditionen zu ermöglichen.These resistance values were chosen on the assumption that the resistance range of the meter is limited to 3000 ohms maximum with an accuracy of +/- 150 ohms. The above-mentioned resistances result in nearly equidistant resistance values in the range of the mentioned measuring range in order to allow a better differentiation of the different fault conditions.

Wie sich aus der Darstellung der rechten Hälfte der Fig. 3 ergibt, ist beim normalen Betrieb der Notabschaltdetektorvorrichtung der Gesamtwiderstand 1499 Ω. Bei einer Unterbrechung einer der Leitungen 3 bzw. 4 in dem Sensorelement 5 bzw. in dessen freiem Ende 7 ergibt sich ein Widerstand von 2518 Ω.As can be seen from the representation of the right half of Fig. 3 In the normal operation of the emergency shutdown detector device, the total resistance is 1499 Ω. In an interruption of one of the lines 3 and 4 in the sensor element 5 and in the free end 7 results in a resistance of 2518 Ω.

Bei einem Kurzschluss zwischen den Leitungen 3, 4 ergibt sich ein Widerstand von 769 Ω. Bei einem Kurzschluss zwischen den Leitungen 1 und 2 ergibt sich ein sehr geringer Widerstand (< 13 Ω). Bei einem Bruch einer der Leitungen 1 oder 2 ergibt sich ein unendlicher Widerstand.A short circuit between the lines 3, 4 results in a resistance of 769 Ω. A short circuit between lines 1 and 2 results in a very low resistance (<13 Ω). If one of the lines 1 or 2 breaks, an infinite resistance results.

Durch die auftretenden Temperaturänderungen im Bereich der Widerstände beim Betrieb einer Gasturbine ergeben sich bei dem Ausführungsbeispiel beispielsweise Schwankungen von 8 % hinsichtlich der jeweiligen Widerstandswerte. Es versteht sich, dass die oben genannten Werte nur exemplarisch sind. Erfindungsgemäß liegen jedoch bei den einzelnen Betriebszuständen oder Betriebsstörungen ganz definierte Widerstandswerte in der Schaltung vor, so dass es auf einfachste Weisemöglich ist, den Betriebszustand eines Wellenbruchs und somit einer Abtrennung des freien Endes 7 des Sensorelements 5 von sonstigen Betriebsstörungen (Kurzschlüsse, Verbindungsunterbrechungen oder Ähnlichem) zu unterscheiden.Due to the temperature changes occurring in the region of the resistors during operation of a gas turbine, in the exemplary embodiment, for example, fluctuations of 8% with respect to the respective resistance values result. It is understood that the above values are only exemplary. According to the invention, however, completely defined resistance values are present in the circuit in the individual operating states or malfunctions, so that it is possible in the simplest possible way for the operating state of a shaft break and thus a separation of the free end 7 of the sensor element 5 from other malfunctions (short circuits, connection interruptions or the like). to distinguish.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Zuleitungsupply
22
Ableitungderivation
33
Zuleitungsupply
44
Ableitungderivation
55
Sensorelementsensor element
66
Anschlussbereichterminal area
77
Freies EndeFree end
88th
Halterungholder
99
Abdeckungcover
1010
Nutgroove
1111
Nutgroove
1212
Trennvorsprungseverance protrusion
1313
Trennlinieparting line
1414
Flanschflange

Claims (4)

  1. Emergency shutdown detection device for a gas turbine having a longish sensor element (5), which is mechanically severable at an end area and in which at least one electric line, including an electric supply line (1, 3) and an electric discharge line (2, 4), is insulatedly provided, said supply line (1, 3) and said discharge line (2, 4) being electrically connected to each other in the area of the free end (7) of the sensor element (5), characterized in that in the electric line at least one electrical resistor (R1 to R3) is arranged such that upon severance of the sensor element (5) a given resistance value prevails.
  2. Device in accordance with Claim 1, characterized in that in the supply line (1, 3) a resistor (R3) is arranged in series and that subsequently two resistors (R2 and R1) are provided, which are arranged in parallel, with the supply line (1, 3) and the discharge line (2, 4) being connected by these two resistors only.
  3. Device in accordance with Claim 2, characterized in that one (R1) of the parallel resistors is arranged in the free, mechanically severable end area of the sensor element (5) and the two other resistors (R2, R3) are arranged in the connecting portion (6) of the device.
  4. Device in accordance with Claim 2, characterized in that all resistors (R1 to R3) are arranged in the connecting portion (6) of the device.
EP07004819.4A 2006-04-05 2007-03-08 Emergency shutdown detection system for a gas turbine Expired - Fee Related EP1847688B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006016011A DE102006016011A1 (en) 2006-04-05 2006-04-05 Emergency shutdown detector device for a gas turbine

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EP1847688A2 EP1847688A2 (en) 2007-10-24
EP1847688A3 EP1847688A3 (en) 2016-03-23
EP1847688B1 true EP1847688B1 (en) 2019-05-08

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EP07004819.4A Expired - Fee Related EP1847688B1 (en) 2006-04-05 2007-03-08 Emergency shutdown detection system for a gas turbine

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US (1) US7782221B2 (en)
EP (1) EP1847688B1 (en)
DE (1) DE102006016011A1 (en)

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Also Published As

Publication number Publication date
EP1847688A3 (en) 2016-03-23
US7782221B2 (en) 2010-08-24
US20070241921A1 (en) 2007-10-18
EP1847688A2 (en) 2007-10-24
DE102006016011A1 (en) 2007-10-18

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