EP2481885A1 - Guide blade assembly and method for fine tuning the swallowing capacity of such a guide blade assembly - Google Patents
Guide blade assembly and method for fine tuning the swallowing capacity of such a guide blade assembly Download PDFInfo
- Publication number
- EP2481885A1 EP2481885A1 EP11152916A EP11152916A EP2481885A1 EP 2481885 A1 EP2481885 A1 EP 2481885A1 EP 11152916 A EP11152916 A EP 11152916A EP 11152916 A EP11152916 A EP 11152916A EP 2481885 A1 EP2481885 A1 EP 2481885A1
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- European Patent Office
- Prior art keywords
- steam
- vane
- row
- vanes
- injected
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
- F01D5/145—Means for influencing boundary layers or secondary circulations
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- 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
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
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- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/148—Blades with variable camber, e.g. by ejection of fluid
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- 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
- F05D2220/31—Application in turbines in steam turbines
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- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
Definitions
- the invention relates to a guide vane row for a steam turbine according to the preamble of claim 1, as well as a method for fine adjustment of the absorption capacity of such a guide vane row.
- Vanes rows have a plurality of vanes, which are arranged distributed uniformly over the circumference, wherein between the vanes blade channels are formed. Radially, the blade channels are limited on the hub side by a hub contour ring and on the housing side by a housing contour ring.
- the absorption capacity of the steam turbine is largely determined by the absorption capacity of the first guide vane row, so that in the design of the steam turbine this vane row is of particular importance.
- the absorption capacity of this first row of guide vanes which is also referred to as the vane ring, is determined essentially by its flow cross section, which comprises the entirety of all effective cross sections of the vane ducts.
- the vane rows, and in particular the vane ring at nuclear power plants, are subject in their manufacture building tolerances of about conventional ⁇ 2%.
- the flow cross-section and thus the actual swallowing capacity deviate from the size originally used in the design of the steam turbine.
- the steam steam turbine main steam valve must be throttled at a constant turbine speed and constant live steam pressure in order to maintain the live steam pressure in front of the steam turbine. The throttling then leads to an additional loss of vapor pressure via the main steam valve. If the steam turbine used in a nuclear power plant, for example, it may lead to a drop in generator power of up to 5 megawatts.
- the vanes of the steam turbine are usually designed to be about 2% too large.
- the invention has for its object to provide a guide vane row for a steam turbine and a method for fine adjustment of the absorption capacity of such a guide vane row, with which the aforementioned disadvantages are overcome.
- Such an adjustment or fine adjustment is preferably carried out once when commissioning the steam turbine by the actual and desired value of the ability to swallow the vane row is compared and the pressure of the injected steam is controlled so that the actual value within an allowable tolerance band of Target value comes to rest.
- the regulation of the ability to swallow can also be repeated as required, for example during the later operation of the steam turbine during a load change.
- the ability to swallow can also be reduced and increased dynamically during operation, thus adapting to current operating conditions.
- the fact that the pressure which is present in the interior of the at least one guide vane makes it possible to adjust the absorption capacity of the steam turbine variably and quickly adapted to current operating conditions.
- the steam is injected into the blade channels via the blade sides of the guide blades in such a way that a virtually uniform boundary layer is formed on the surfaces of the blade sides.
- At least one of the bushings is arranged so that a correspondingly changed flow profile between the guide vanes is achieved.
- a more homogeneous boundary layer can be achieved if several vapor passages are arranged next to one another distributed over the height of the guide blade and / or over the profile circumference.
- the guide vane ring is designed according to the invention as the first row of guide vanes of the steam turbine, since it determines the absorption capacity of the steam turbine, especially in the case of nuclear power plants. Further injections from at least one of the guide vanes of a plurality, for example, the guide vane ring subsequent, rows of guide blades improve the inventive method on.
- the method according to the invention can be realized in a particularly simple manner if the injected steam is tapped off upstream of the respective row of guide blades to be matched, in particular in front of a main steam valve for the first row of vanes, since there is always steam at a higher pressure level than the row of guide vanes itself to be adapted.
- such flow channels K are determined by a plurality of blade channels, which form through free spaces between the guide vanes L arranged adjacent to one another in the circumferential direction of a row of guide blades.
- the cross section across all blade channels then forms the flow cross section which is effectively available for a process steam mass flow P as the process medium.
- a steam D injected under pressure from the guide blade L into a blade channel K obstructs this process steam mass flow P and thus acts more or less like a narrowing of the flow cross-section which is effectively available to it, which leads to a reduction in the absorption capacity of the steam turbine.
- FIGS. 2 to 4 Various exemplary embodiments of guide vanes L designed according to the invention are shown in FIGS. 2 to 4 shown schematically.
- two sections through vanes FIGS. 2 and 3
- a plan view of the profile of a vane FIG. 4
- passages B any type of openings in the guide vane wall are possible, which allow vapor D from the interior of the guide vanes out to the surface of the vane.
- This can be simple holes, or even elongated recesses as in FIG. 4 shown in plan view.
- a vane L has at least one single passage B, which is arranged, for example, in the region of the front edge of the suction side of the vane.
- the passage can be made elongated over the height of the vane L as a single passage, or as in plan view in FIG FIG. 4 shown consist of several over the height of the vane in a row lying individual bushings B.
- a plurality of distributed over the profile of the guide blade L rows with bushings B are provided, wherein also here the rows are preferably arranged in the region of the front edge of the suction side.
Abstract
Description
Die Erfindung betrifft eine Leitschaufelreihe für eine Dampfturbine gemäß dem Oberbegriff des Anspruchs 1, sowie ein Verfahren zur Feinjustage der Schluckfähigkeit einer solchen Leitschaufelreihe.The invention relates to a guide vane row for a steam turbine according to the preamble of claim 1, as well as a method for fine adjustment of the absorption capacity of such a guide vane row.
Um einen wirtschaftlichen Betrieb einer Dampfturbine zu erzielen, ist es von Bedeutung, dass der geforderte Prozessdampfmassenstrom eines Dampferzeugers, beispielsweise eines Kernkraftwerks, die Dampfturbine passieren kann. Entscheidend dabei ist die Schluckfähigkeit der Turbine. Generell ist die Schluckfähigkeit definiert als ein Massenstrom, der bei gegebenem Druck vor und hinter einer Beschaufelung durch diese strömen kann, was im Prinzip der Dampfkegelgleichung entspricht. In diese geht auch die Dichte, sprich die Temperatur des Dampfes ein.In order to achieve economical operation of a steam turbine, it is important that the required process steam mass flow of a steam generator, for example a nuclear power plant, can pass through the steam turbine. Crucial here is the ability to swallow the turbine. In general, the ability to swallow is defined as a mass flow that can flow through it at a given pressure in front of and behind a blading, which corresponds in principle to the steam cone equation. The density, that is the temperature of the steam, also enters into these.
Von besonderer Bedeutung ist diese Schluckfähigkeit der Beschaufelung in Kernkraftwerken, da hier der Frischdampfdruck direkt die Leistung des Dampferzeugers beeinflusst. Leitschaufelreihen weisen dabei eine Vielzahl an Leitschaufeln auf, die gleichmäßig über den Umfang verteilt angeordnet sind, wobei zwischen den Leitschaufeln Schaufelkanäle ausgebildet sind. Radial sind die Schaufelkanäle nabenseitig begrenzt von einem Nabenkonturring und gehäuseseitig von einem Gehäusekonturring. Die Schluckfähigkeit der Dampfturbine wird maßgeblich durch die Schluckfähigkeit des ersten Leitschaufelreihe vorgegeben, so dass bei der Auslegung der Dampfturbine dieser Leitschaufelreihe von besonderer Bedeutung ist. Die Schluckfähigkeit dieser ersten Leitschaufelreihe, die auch als Leitschaufelkranz bezeichnet wird, wird dabei im Wesentlichen durch dessen Strömungsquerschnitt bestimmt, der die Gesamtheit aller effektiven Querschnitte der Schaufelkanäle umfasst.Of particular importance is this ability to swallow the blading in nuclear power plants, since here the live steam pressure directly affects the performance of the steam generator. Vanes rows have a plurality of vanes, which are arranged distributed uniformly over the circumference, wherein between the vanes blade channels are formed. Radially, the blade channels are limited on the hub side by a hub contour ring and on the housing side by a housing contour ring. The absorption capacity of the steam turbine is largely determined by the absorption capacity of the first guide vane row, so that in the design of the steam turbine this vane row is of particular importance. The absorption capacity of this first row of guide vanes, which is also referred to as the vane ring, is determined essentially by its flow cross section, which comprises the entirety of all effective cross sections of the vane ducts.
Die Leitschaufelreihen, und insbesondere der Leitschaufelkranz bei Kernkraftwerken, unterliegen bei ihrer Herstellung Bautoleranzen von herkömmlich etwa ±2%. In der Folge weichen auch der Strömungsquerschnitt und somit die real vorliegende Schluckfähigkeit von der ursprünglich bei der Auslegung der Dampfturbine zugrunde gelegten Größe ab. Fällt die Schluckfähigkeit der Dampfturbine aus reaktortechnischer Sicht zu groß aus, muss bei konstanter Turbinendrehzahl und konstantem Frischdampfdruck das Frischdampfventil der Dampfturbine entsprechend angedrosselt werden um vor der Dampfturbine den Frischdampfdruck zu halten. Das Androsseln führt dann zu einem zusätzlichen Dampfdruckabfall über das Frischdampfventil. Ist die Dampfturbine beispielsweise in einem Kernkraftwerk eingesetzt, so kann es zu einem Abfall der Generatorleistung von bis zu 5 Megawatt kommen. Fällt hingegen die Schluckfähigkeit der Dampfturbine zu klein aus, muss der Prozessdampfmassenstrom entsprechend verringert werden, wodurch sich die Generatorleistung noch weiter absenkt. Um dieses ungünstige Szenario zu vermeiden, sind die Leitschaufeln der Dampfturbine in der Regel um ca. 2% zu groß ausgelegt. Während es aber bei einer Leitschaufelreihe mit zu kleinen Strömungsquerschnitten in gewissen Grenzen die Möglichkeit gibt die Schluckfähigkeit durch eine Nachbearbeitung zu erhöhen, ist eine solche Nachbearbeitung bei einer Leitschaufelreihe bzw. einem Leitschaufelkranz mit zu kleinen Leitschaufeln und damit zu großen Strömungsquerschnitten nicht möglich.The vane rows, and in particular the vane ring at nuclear power plants, are subject in their manufacture building tolerances of about conventional ± 2%. As a result, the flow cross-section and thus the actual swallowing capacity deviate from the size originally used in the design of the steam turbine. If the absorption capacity of the steam turbine is too large from a reactor-technical point of view, the steam steam turbine main steam valve must be throttled at a constant turbine speed and constant live steam pressure in order to maintain the live steam pressure in front of the steam turbine. The throttling then leads to an additional loss of vapor pressure via the main steam valve. If the steam turbine used in a nuclear power plant, for example, it may lead to a drop in generator power of up to 5 megawatts. If, on the other hand, the steam capacity of the steam turbine drops too low, the process steam mass flow must be correspondingly reduced, as a result of which the generator output is lowered even further. To avoid this unfavorable scenario, the vanes of the steam turbine are usually designed to be about 2% too large. However, while it is possible to increase the ability to swallow by reworking a guide vane row with too small flow cross-sections within certain limits, such reworking is not possible with a row of vanes or a Leitschaufelkranz with too small vanes and thus large flow cross sections.
Der Erfindung liegt die Aufgabe zugrunde, eine Leitschaufelreihe für eine Dampfturbine und ein Verfahren zur Feinjustage der Schluckfähigkeit einer solchen Leitschaufelreihe anzugeben, mit dem die zuvor genannten Nachteile überwunden werden.The invention has for its object to provide a guide vane row for a steam turbine and a method for fine adjustment of the absorption capacity of such a guide vane row, with which the aforementioned disadvantages are overcome.
Diese Aufgabe wird erfindungsgemäß mit einer Leitschaufelreihe für eine Dampfturbine gemäß Anspruch 1 gelöst. Ferner wird die Aufgabe mit einem Verfahren zur Feinjustage der Schluckfähigkeit einer Leitschaufelreihe gemäß Anspruch 6 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen beschrieben.This object is achieved with a guide vane row for a steam turbine according to claim 1. Furthermore, the object is achieved with a method for fine adjustment of the ability to swallow a vane row according to claim 6. Advantageous developments of the invention are described in the dependent claims.
Dadurch, dass der über zumindest eine Durchführung aus zumindest einer Leitschaufel einer Leitschaufelreihe austretende Dampf in die zwischen den Leitschaufeln befindlichen Schaufelkanäle eingedüst wird, wird der durch diese Schaufelkanäle strömenden Prozessdampfmassenstrom behindert. Folglich wird der dem Prozessdampfmassenstrom zur Verfügung stehende effektive Strömungsquerschnitt der Schaufelkanäle eingeengt und somit letztendlich eine Reduzierung der Schluckfähigkeit der Leitschaufelreihe und damit der Dampfturbine erreicht. Für den Prozessdampf wirkt der eingedüste Dampf dabei wie eine weitere Drosselung seines Massedurchflusses durch die Dampfturbine. Durch eine entsprechende Eindüsung können nun auch zu klein geratene Leitschaufeln und damit Leitschaufelreihen mit zu großen Strömungsquerschnitten nachjustiert werden und müssen nicht ausgetauscht werden. Dies funktioniert besonders einfach, wenn der Dampf im Innern einer Leitschaufel einen Druck aufweist, der über dem in den Schaufelkanälen vorliegenden Prozessdampfdruck (Sattdampfdruck bei Kernkraftwerken bzw. überhitzter Dampf bei fossilen Kraftwerken) liegt.Because the steam exiting via at least one passage from at least one guide vane of a row of guide vanes is injected into the vane passages located between the vanes, the process vapor mass flow flowing through these vane passages is hindered. As a result, the effective flow cross section of the blade channels available to the process steam mass flow is narrowed, and thus ultimately a reduction in the ability to absorb the number of guide blades and thus of the steam turbine is achieved. For the process steam, the injected steam acts like a further throttling of its mass flow through the steam turbine. By means of an appropriate injection, guide vanes that are too small and therefore guide vanes rows with flow cross sections that are too small can now be readjusted and do not have to be exchanged. This is particularly simple if the steam inside a vane has a pressure that is above the process vapor pressure present in the vane channels (saturated steam pressure in nuclear power plants or superheated steam in fossil power plants).
Eine solche Justage bzw. Feinjustage wird vorzugsweise einmalig bei der Inbetriebnahme der Dampfturbine erfolgen, indem der Ist- und Soll-Wert der Schluckfähigkeit der Leitschaufelreihe verglichen wird und der Druck des eingedüsten Dampfes so geregelt wird, dass der Ist-Wert innerhalb eines zulässigen Toleranzbandes des Soll-Werts zum Liegen kommt. Die Regelung der Schluckfähigkeit kann aber auch je nach Bedarf, z.B. während des späteren Betriebs der Dampfturbine bei einem Lastwechsel, wiederholt werden. Somit kann die Schluckfähigkeit auch dynamisch während des Betriebs sowohl verringert als auch erhöht und so auf aktuelle Betriebsbedingungen angepasst werden. Insgesamt wird dadurch, dass der im Innern der zumindest einen Leitschaufel vorliegende Druck regelbar ist eine Möglichkeit geschaffen, die Schluckfähigkeit der Dampfturbine variabel und schnell an aktuelle Betriebsbedingungen anzupassen.Such an adjustment or fine adjustment is preferably carried out once when commissioning the steam turbine by the actual and desired value of the ability to swallow the vane row is compared and the pressure of the injected steam is controlled so that the actual value within an allowable tolerance band of Target value comes to rest. However, the regulation of the ability to swallow can also be repeated as required, for example during the later operation of the steam turbine during a load change. As a result, the ability to swallow can also be reduced and increased dynamically during operation, thus adapting to current operating conditions. Overall, the fact that the pressure which is present in the interior of the at least one guide vane makes it possible to adjust the absorption capacity of the steam turbine variably and quickly adapted to current operating conditions.
Vorteilhafterweise wird der Dampf über die Schaufelseiten der Leitschaufeln so in die Schaufelkanäle eingedüst, dass eine nahezu gleichmäßige Grenzschicht auf den Oberflächen der Schaufelseiten entsteht. Dadurch wird eine ähnliche Wirkung erreicht, wie im Falle dass die Leitschaufeln durch größere Leitschaufeln ausgetauscht werden müssten. Zumindest eine der Durchführungen ist dabei so angeordnet, dass ein entsprechend verändertes Strömungsprofil zwischen den Leitschaufeln erzielt wird. Eine homogenere Grenzschicht lässt sich erreichen, wenn mehrere Dampfdurchführungen nebeneinander über die Höhe der Leitschaufel und/oder über deren Profilumfang verteilt angeordnet sind.Advantageously, the steam is injected into the blade channels via the blade sides of the guide blades in such a way that a virtually uniform boundary layer is formed on the surfaces of the blade sides. As a result, a similar effect is achieved, as in the case that the vanes would have to be replaced by larger vanes. At least one of the bushings is arranged so that a correspondingly changed flow profile between the guide vanes is achieved. A more homogeneous boundary layer can be achieved if several vapor passages are arranged next to one another distributed over the height of the guide blade and / or over the profile circumference.
Besonders vorteilhaft ist es, wenn der Leitschaufekranz als erste Leitschaufelreihe der Dampfturbine erfindungsgemäß ausgebildet ist, da dieser gerade bei Kernkraftwerken die Schluckfähigkeit der Dampfturbine maßgeblich bestimmt. Weitere Eindüsungen aus zumindest einer der Leitschaufeln aus mehreren, beispielsweise dem Leitschaufelkranz nachfolgende, Leitschaufelreihen verbessern das erfindungsgemäße Verfahren weiter.It is particularly advantageous if the guide vane ring is designed according to the invention as the first row of guide vanes of the steam turbine, since it determines the absorption capacity of the steam turbine, especially in the case of nuclear power plants. Further injections from at least one of the guide vanes of a plurality, for example, the guide vane ring subsequent, rows of guide blades improve the inventive method on.
Besonders einfach lässt sich das erfindungsgemäße Verfahren dann realisieren, wenn der eingedüste Dampf stromaufwärts vor der jeweiligen anzupassenden Leitschaufelreihe, insbesondere vor einem Frischdampfventil für die erste Leitschaufelreihe abgegriffen wird, da hier immer Dampf mit einem höherem Druckniveau als an der anzupassenden Leitschaufelreihe selbst vorliegt.The method according to the invention can be realized in a particularly simple manner if the injected steam is tapped off upstream of the respective row of guide blades to be matched, in particular in front of a main steam valve for the first row of vanes, since there is always steam at a higher pressure level than the row of guide vanes itself to be adapted.
Die Erfindung soll nun anhand der nachfolgenden Figuren beispielhaft erläutert werden. Es zeigen:
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FIG 1 schematisch das Wirkprinzip der Erfindung, -
FIG 2-4 schematisch Beispiele erfindungsgemäß ausgebildeter Leitschaufeln.
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FIG. 1 schematically the operating principle of the invention, -
FIGS. 2-4 schematic examples of inventively designed vanes.
Anhand der Darstellung in
Im Falle einer Dampfturbine werden solche Strömungskanäle K bestimmt durch eine Vielzahl von Schaufelkanälen, welche sich durch Freiräume zwischen den in Umfangsrichtung einer Leitschaufelreihe benachbart angeordneter Leitschaufeln L ausbilden. Der Querschnitt über alle Schaufelkanäle bildet dann den effektiv für einen Prozessdampfmassenstrom P als Prozessmedium zur Verfügung stehenden Strömungsquerschnitt. Ein unter Druck aus der Leitschaufel L heraus in einen Schaufelkanal K eingedüster Dampf D behindert diesen Prozessdampfmassenstrom P und wirkt damit quasi wie eine Einengung des ihm effektiv zur Verfügung stehenden Strömungsquerschnitts, was zu einer Verringerung der Schluckfähigkeit der Dampfturbine führt. Durch eine entsprechende Eindüsung von Dampf D über entsprechende Durchführungen B aus den Leitschaufeln L in Schaufelkanäle K kann so die Schluckfähigkeit der Leitschaufelreihe und damit der Dampfturbine innerhalb bestimmter Grenzen feinjustiert werden, ohne dass mechanische Veränderungen an der Leitschaufelreihe selbst vorgenommen werden müssen.In the case of a steam turbine, such flow channels K are determined by a plurality of blade channels, which form through free spaces between the guide vanes L arranged adjacent to one another in the circumferential direction of a row of guide blades. The cross section across all blade channels then forms the flow cross section which is effectively available for a process steam mass flow P as the process medium. A steam D injected under pressure from the guide blade L into a blade channel K obstructs this process steam mass flow P and thus acts more or less like a narrowing of the flow cross-section which is effectively available to it, which leads to a reduction in the absorption capacity of the steam turbine. By a corresponding injection of steam D via corresponding passages B from the guide vanes L in blade channels K so the absorption capacity of the stator blade and thus the steam turbine can be finely adjusted within certain limits without mechanical changes to the vane row itself must be made.
Verschiedene beispielhafte Ausgestaltungen erfindungsgemäß ausgebildeter Leitschaufeln L sind in
Claims (14)
dadurch gekennzeichnet, dass der Dampf im Innern der zumindest einen Leitschaufel einen Druck aufweist, der über dem in den Schaufelkanälen vorliegenden Prozessdampfdruck liegt.Guide vane row according to claim 1,
characterized in that the steam in the interior of the at least one guide vane has a pressure which is above the present in the blade channels process vapor pressure.
dadurch gekennzeichnet, dass der im Innern der zumindest einen Leitschaufel vorliegende Druck regelbar ist.Guide vane row according to claim 2,
characterized in that the pressure present in the interior of the at least one guide vane is controllable.
dadurch gekennzeichnet, dass der Dampf aus zumindest einer der Leitschaufeln der ersten Leitschaufelreihe heraus eingedüst wird.Method according to claim 6,
characterized in that the steam is injected from at least one of the vanes of the first row of vanes out.
dadurch gekennzeichnet, dass der Dampf aus zumindest einer Leitschaufel aus mehreren Leitschaufelreihen heraus eingedüst wird.Method according to claim 6 or 7,
characterized in that the steam is injected from at least one vane from a plurality of vane rows out.
dadurch gekennzeichnet, dass der eingedüste Dampf stromaufwärts vor der jeweiligen Leitschaufelreihe abgegriffen wird.Method according to claim 9,
characterized in that the injected steam is tapped upstream of the respective row of vanes.
Priority Applications (1)
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EP11152916A EP2481885A1 (en) | 2011-02-01 | 2011-02-01 | Guide blade assembly and method for fine tuning the swallowing capacity of such a guide blade assembly |
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EP11152916A EP2481885A1 (en) | 2011-02-01 | 2011-02-01 | Guide blade assembly and method for fine tuning the swallowing capacity of such a guide blade assembly |
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Cited By (3)
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EP3098393A1 (en) * | 2015-05-11 | 2016-11-30 | General Electric Company | System and method for flow control in turbine |
US9617874B2 (en) | 2013-06-17 | 2017-04-11 | General Electric Technology Gmbh | Steam power plant turbine and control method for operating at low load |
US20210301684A1 (en) * | 2020-03-30 | 2021-09-30 | General Electric Company | Fluidic flow control device |
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FR1519899A (en) * | 1967-02-24 | 1968-04-05 | Creusot Forges Ateliers | Improvements to distributor blades of low pressure parts of a steam turbine |
US20070274824A1 (en) * | 2006-05-23 | 2007-11-29 | General Electric Company | Airfoil and method for moisture removal and steam injection |
WO2008065447A1 (en) * | 2006-12-01 | 2008-06-05 | Parsons Brinckerhoff Limited | Flow control device |
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US20070274824A1 (en) * | 2006-05-23 | 2007-11-29 | General Electric Company | Airfoil and method for moisture removal and steam injection |
WO2008065447A1 (en) * | 2006-12-01 | 2008-06-05 | Parsons Brinckerhoff Limited | Flow control device |
EP2072756A2 (en) * | 2007-12-19 | 2009-06-24 | United Technologies Corporation | Systems and methods involving variable throat area vanes |
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US9617874B2 (en) | 2013-06-17 | 2017-04-11 | General Electric Technology Gmbh | Steam power plant turbine and control method for operating at low load |
EP3098393A1 (en) * | 2015-05-11 | 2016-11-30 | General Electric Company | System and method for flow control in turbine |
US9957900B2 (en) | 2015-05-11 | 2018-05-01 | General Electric Company | System and method for flow control in turbine |
EP3098393B1 (en) * | 2015-05-11 | 2020-12-23 | General Electric Company | System and method for flow control in turbine |
US20210301684A1 (en) * | 2020-03-30 | 2021-09-30 | General Electric Company | Fluidic flow control device |
WO2021197977A1 (en) * | 2020-03-30 | 2021-10-07 | General Electric Company | Fluidic flow control device in a steam turbine |
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