EP1771663A1 - Method for modifying a turbocompressor - Google Patents

Method for modifying a turbocompressor

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Publication number
EP1771663A1
EP1771663A1 EP05776213A EP05776213A EP1771663A1 EP 1771663 A1 EP1771663 A1 EP 1771663A1 EP 05776213 A EP05776213 A EP 05776213A EP 05776213 A EP05776213 A EP 05776213A EP 1771663 A1 EP1771663 A1 EP 1771663A1
Authority
EP
European Patent Office
Prior art keywords
compressor
blow
line
gas turbine
turbine group
Prior art date
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.)
Granted
Application number
EP05776213A
Other languages
German (de)
French (fr)
Other versions
EP1771663B1 (en
Inventor
Daniel Glesti
Marco Micheli
Thomas Palkovich
Wilfried Rick
Sasha Savic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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Application filed by Alstom Technology AG filed Critical Alstom Technology AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/912—Interchangeable parts to vary pumping capacity or size of pump

Definitions

  • the invention relates to a method for the modification of a
  • Turbocompressors according to the preamble of claim 1. It further relates to a modified according to this method turbo compressor, as well as uses of the present invention modified turbo compressor.
  • the invention characterized in the claims invention has for its object to provide a method of the type mentioned above, that even a modified compressor, which has an increased nominal mass flow, can be approached easily.
  • the capacity for blowing off compressed or partially compressed fluid is increased.
  • the capacity is increased, for example, in the same ratio, as increased by the modification of the compressor blades, the intake volume flow.
  • the increase in the Abblasekapaztician by the critical flow area is increased at least one of the compressor connected to the blow-off line.
  • the narrowest cross-section of the flow line must be increased. This is often in the obturator, which serves to close and release the Abblase horr.
  • the invention can therefore be realized very simply by replacing the obturator, also called blow-off valve, by a shut-off device with an enlarged free cross-section.
  • Blow-off lines arranged. This can be done by existing, sealed by flanged lid openings of the compressor housing opened and additional Abblase effeten be connected to the resulting housing openings. Alternatively, additional new housing openings can be incorporated into the compressor housing.
  • the additional blow-off lines can be arranged on the one hand at a pressure stage of the compressor, on which there is already an existing blow-off line. It then increases the Abblasekapaztician at the corresponding pressure level of the compressor. But it is also quite possible to arrange the additional blow-off at a position at which no Abblasetechnisch is connected before the modification. It is then created at a pressure additional Abblase réellekeit.
  • Blow-off lines are or are generally arranged on the compressor in such a way that partially compressed fluid is blown off.
  • the blow-off line branches off between two compressor stages. This ensures that, as mentioned in the introduction, when the blow-off line is open, the mass flow in the front compressor stages is greater than in the rear compressor stages.
  • a blow-off conduit may be disposed downstream of the compressor and upstream of the consumer.
  • a blow-off line of a compressor of a gas turbine group is arranged downstream of the compressor and upstream of a first combustion chamber of the gas turbine group.
  • the invention is suitable for conversion and performance of a turbo compressor, which is for example the compressor of a gas turbine group.
  • the gas turbine group in turn is in one Embodiment of the invention Component of a power plant, for example a combined plant.
  • FIGURE shows a gas turbine group before and after an inventive modification of the compressor.
  • the drawing and the embodiment are to be understood as purely exemplary; Elements not necessary for understanding the invention have been omitted.
  • Figure 1a shows a gas turbine group, comprising a compressor 1, a combustion chamber 2, and a turbine 3, as is well known to those skilled in the art.
  • the compressor 1 sucks in an intake volume flow or a nominal mass flow mi. This air mass flow is compressed in the compressor 1.
  • a fuel mass flow is burned in the combustion chamber 2, and the resulting hot flue gas is expanded to perform work in the turbine 3.
  • blow-off lines 11 and 12 are arranged with shut-off elements 21 and 22. As stated in the introduction, these blow-off pipes serve to blow off partially compressed air from the compressor during start-up of the compressor at speeds well below the rated speed.
  • the gas turbine group is shown according to an inventive modification of the compressor 1.
  • equipping with improved compressor blades increases the intake volumetric flow of the compressor 1, and accordingly promotes the compressor a nominal mass flow ⁇ i2, which is greater than the nominal mass flow mi before the conversion.
  • the increase in the nominal mass flow causes the air mass flow blown off during start-up to be proportionate less than before conversion to new blades. This potentially results in the occurrence of stalling in the front compressor stages and / or clogging of the rear compressor stages despite compressor air blow-off.
  • the blow-off capacities of the compressor have now been increased.
  • the blow-off valve 21 of the blow-off line 11 is replaced by a blow-off valve 21a with an enlarged passage cross-section.
  • a new blow-off line 13 has been rearranged with a blow-off valve 23.
  • the blow-off line 13 can branch off at a pressure stage of the compressor, on which another blow-off line is already arranged, as shown in the figure.
  • the blow-off line 13 may, however, also be arranged at a location of the compressor at which no blow-off line was previously arranged.
  • the blow-off line 13 on the one hand connect to an already existing, but previously closed by a flange cover opening of the housing of the compressor 1; If appropriate, however, a new opening may also have been incorporated into the housing, to which the new discharge line 13 then adjoins.
  • blow-off line 14 connects with a blow-off valve 24.
  • Blow-off line 21 shut-off valve, blow-off valve
  • Nri2 Ansaugmassenstrom after the modification

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

Disclosed is a method for modifying a turbocompressor, according to which the compressor blades are replaced with new compressor blades in such a way that the conveyed mass flow rate of the compressor increases while the discharge capacities during starting are augmented.

Description

Verfahren zur Modifikation eines Turbokompressors Method for modifying a turbocompressor
Technisches GebietTechnical area
[0001] Die Erfindung betrifft ein Verfahren zur Modifikation einesThe invention relates to a method for the modification of a
Turbokompressors gemäss dem Oberbegriff des Anspruchs 1. Sie betrifft weiterhin einen gemäss diesem Verfahren modifizierten Turbokompressor, sowie Verwendungen des erfindungsgemäss modifizierten Turbokompressors.Turbocompressors according to the preamble of claim 1. It further relates to a modified according to this method turbo compressor, as well as uses of the present invention modified turbo compressor.
Stand der TechnikState of the art
[0002] Beim Anfahren eines Turbokompressors ist der Kompressor aufgrund der Stufenkinematik bei niedrigen Drehzahlen nicht in der Lage, den gesamten geförderten Einlassvolumenstrom gegen den vom Verbraucher aufgeprägten Druck zu fördern. Problematisch bei Unterdrehzahl eines Turbokompressors ist auch, dass der Volumenstrom in den hinteren Verdichterstufen deutlich geringer abfällt als dies der Auslegung der Durchströmungsquerschnitte entspricht. Damit wird einerseits der Enthalpieaufbau in die vorderen Verdichterstufen verschoben, welche somit eine verstärkte Ablöseneigung der Verdichterströmung aufweisen. Zum anderen kommt es in den hinteren Verdichterstufen potenziell zu einer Verstopfung der Durchströmungsquerschnitte, was den Druckaufbau in den vorderen Verdichterstufen weiter erhöht. Es ist daher bekannt, an Zwischenstufen von Turboverdichtern absperrbare Abblaseleitungen anzuordnen. Beim Beschleunigen des Turboverdichters werden diese Abblaseleitungen geöffnet. Damit wird ein Teil des in den vorderen Verdichterstufen geförderten Massenstroms abgeleitet, und die hinteren Verdichterstufen werden nur mit einem Teilmassenstrom beaufschlagt. Es wird gewährleistet, dass die Axialgeschwindigkeit der Strömung in den vorderen Verdichterstufen gross genug ist, um einen Strömungsabriss zu verhindern, während die Axialgeschwindigkeit in den hinteren Verdichterstufen keine kritischen Werte erreicht.When starting a turbocompressor, the compressor is due to the step kinematics at low speeds not able to promote the entire funded intake flow against the impressed by the consumer pressure. Another problem with underspeed of a turbocompressor is that the volume flow in the rear compressor stages drops significantly less than corresponds to the design of the flow cross sections. Thus, on the one hand, the enthalpy structure is displaced into the front compressor stages, which thus have an increased tendency to detach the compressor flow. On the other hand, in the rear compressor stages there is potentially a blockage of the flow cross sections, which further increases the pressure build-up in the front compressor stages. It is therefore known to arrange at intermediate stages of turbocompressors shut-off blow-off pipes. When accelerating the turbocompressor these blow-off lines are opened. Thus, a portion of the conveyed in the front compressor stages mass flow is derived, and the rear compressor stages are acted upon only with a partial mass flow. It is ensured that the axial velocity of the flow in the front compressor stages is large enough to prevent a stall, while the axial velocity in the rear compressor stages does not reach critical levels.
[0003] Im Laufe der mehrjährigen Nutzungsdauer von Turbokompressoren ermöglicht der Fortschritt auf den Gebieten der Aerodynamik und der Fertigungstechnik Leistungsverbesserungen durch den Einsatz moderner Schaufeln. Von diesen Möglichkeiten wird Gebrauch gemacht, indem bestehende Turbokompressoren, beispielsweise von Gasturbogruppen, mit verbesserten Schaufeln nachgerüstet werden. Der Effekt einer solchen Nachrüstung mit verbesserten Schaufeln ist ein erhöhter Ansaugvolumenstrom und damit Nennmassenstrom des Kompressors, woraus bei einem unveränderten dem Kompressor nachgeordneten Verbraucher, beispielsweise einer Turbine, auch ein höheres Druckverhältnis resultiert.In the course of the multi-year service life of turbo compressors, the progress in the fields of aerodynamics and allows Production technology Performance improvements through the use of modern blades. These possibilities are exploited by retrofitting existing turbocompressors, for example gas turbine groups, with improved blades. The effect of such retrofitting with improved blades is an increased intake volume flow and thus nominal mass flow of the compressor, resulting in an unchanged compressor downstream consumer, such as a turbine, also results in a higher pressure ratio.
Darstellung der ErfindungPresentation of the invention
[0004] Der in den Ansprüchen gekennzeichneten Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art so anzugeben, dass auch ein modifizierter Verdichter, welcher einen erhöhten Nennmassenstrom aufweist, problemlos angefahren werden kann.The invention characterized in the claims invention has for its object to provide a method of the type mentioned above, that even a modified compressor, which has an increased nominal mass flow, can be approached easily.
[0005] Diese Aufgabe wird mit dem in Anspruch 1 gekennzeichneten Verfahren gelöst.This object is achieved by the method characterized in claim 1.
[0006] Gemäss der Erfindung wird also die Kapazität zum Abblasen von verdichtetem oder teilverdichtetem Fluid erhöht. Die Kapazität wird beispielsweise im selben Verhältnis erhöht, wie sich durch die Modifikation der Kompressorschaufeln der Ansaugvolumenstrom erhöht. Gemäss einer ersten Ausführungsform der Erfindung erfolgt die Erhöhung der Abblasekapazität indem der kritische Durchströmquerschnitt wenigstens einer an den Kompressor angeschlossenen Abblaseleitung vergrössert wird. Hierbei muss im Allgemeinen der engste Querschnitt der Strömungsleitung vergrössert werden. Dieser liegt häufig im Absperrorgan vor, welches dem Schliessen und Freigeben der Abblaseleitung dient. Die Erfindung kann daher sehr einfach realisiert werden, indem das Absperrorgan, auch Abblaseventil genannt, durch ein Absperrorgan mit einem vergrösserten freien Querschnitt ersetzt wird.According to the invention, therefore, the capacity for blowing off compressed or partially compressed fluid is increased. The capacity is increased, for example, in the same ratio, as increased by the modification of the compressor blades, the intake volume flow. According to a first embodiment of the invention, the increase in the Abblasekapazität by the critical flow area is increased at least one of the compressor connected to the blow-off line. In this case, in general, the narrowest cross-section of the flow line must be increased. This is often in the obturator, which serves to close and release the Abblaseleitung. The invention can therefore be realized very simply by replacing the obturator, also called blow-off valve, by a shut-off device with an enlarged free cross-section.
[0007] Gemäss einer zweiten Ausführungsform werden zusätzlicheAccording to a second embodiment, additional
Abblaseleitungen angeordnet. Dies kann erfolgen, indem vorhandene, durch Flanschdeckel verschlossene Öffnungen des Kompressorgehäuses geöffnet und zusätzliche Abblaseleitungen an den dadurch entstehenden Gehäuseöffnungen angeschlossen werden. Alternativ können auch zusätzliche neue Gehäuseöffnungen in das Kompressorgehäuse eingearbeitet werden. Die zusätzlichen Abblaseleitungen können dabei einerseits an einer Druckstufe des Kompressors angeordnet werden, an der bereits eine vorhandene Abblaseleitung vorliegt. Es wird dann die Abblasekapazität an der entsprechenden Druckstufe des Kompressors erhöht. Es ist aber auch durchaus möglich, die zusätzliche Abblaseleitung an einer Stelle anzuordnen, an der vor der Modifikation keine Abblaseleitung angeschlossen ist. Es wird dann an einer zusätzlichen Druckstufe eine Abblasemöglichkeit geschaffen.Blow-off lines arranged. This can be done by existing, sealed by flanged lid openings of the compressor housing opened and additional Abblaseleitungen be connected to the resulting housing openings. Alternatively, additional new housing openings can be incorporated into the compressor housing. The additional blow-off lines can be arranged on the one hand at a pressure stage of the compressor, on which there is already an existing blow-off line. It then increases the Abblasekapazität at the corresponding pressure level of the compressor. But it is also quite possible to arrange the additional blow-off at a position at which no Abblaseleitung is connected before the modification. It is then created at a pressure additional Abblasemöglichkeit.
[0008] Abblaseleitungen sind beziehungsweise werden im Allgemeinen derart am Verdichter angeordnet, dass teilverdichtetes Fluid abgeblasen wird. Beispielsweise zweigt die Abblaseleitung zwischen zwei Verdichterstufen ab. Dies stellt sicher, dass, wie einleitend erwähnt, bei geöffneter Abblaseleitung der Massenstrom in den vorderen Verdichterstufen grösser ist als in den hinteren Verdichterstufen. Wenn der Kompressor mit einem Verbraucher für verdichtetes Fluid in Verbindung steht, wobei der Kompressor stromauf des Verbrauchers, beispielsweise einer Turbine, angeordnet ist, kann weiterhin in einer Ausführungsform eine Abblaseleitung stromab des Kompressors und stromauf des Verbrauchers angeordnet werden. Beispielsweise wird eine Abblaseleitung eines Verdichters einer Gasturbogruppe stromab des Verdichters und stromauf einer ersten Brennkammer der Gasturbogruppe angeordnet. Durch Öffnen einer derart angeordneten Abblaseleitung wird während des Anfahrens des Verdichters der Gegendruck, gegen den der Verdichter arbeiten muss, reduziert und damit die Ablösegefahr vermindert.Blow-off lines are or are generally arranged on the compressor in such a way that partially compressed fluid is blown off. For example, the blow-off line branches off between two compressor stages. This ensures that, as mentioned in the introduction, when the blow-off line is open, the mass flow in the front compressor stages is greater than in the rear compressor stages. Further, in one embodiment, when the compressor is in communication with a consumer of compressed fluid, with the compressor disposed upstream of the consumer, such as a turbine, a blow-off conduit may be disposed downstream of the compressor and upstream of the consumer. For example, a blow-off line of a compressor of a gas turbine group is arranged downstream of the compressor and upstream of a first combustion chamber of the gas turbine group. By opening a blow-off line arranged in this way, the counter-pressure against which the compressor must work is reduced during the start-up of the compressor, thus reducing the risk of separation.
[0009] Die genannten Ausführungsformen können beliebig untereinander kombiniert und einander ergänzend verwendet werden.The embodiments mentioned can be arbitrarily combined with each other and used in addition.
[0010] Die Erfindung eignet sich zur Umrüstung und Leistungssteigerung eines Turbokompressors, der beispielsweise der Kompressor einer Gasturbogruppe ist. Die Gasturbogruppe wiederum ist in einer Ausführungsform der Erfindung Bestandteil einer Kraftwerksanlage, beispielsweise einer Kombianlage.The invention is suitable for conversion and performance of a turbo compressor, which is for example the compressor of a gas turbine group. The gas turbine group in turn is in one Embodiment of the invention Component of a power plant, for example a combined plant.
[0011] Weitere Ausführungsformen der Erfindung erschliessen sich dem Fachmann im Lichte der nachfolgenden Ausführungsbeispiele.Further embodiments of the invention will become apparent to those skilled in the light of the following embodiments.
Kurze Beschreibung der ZeichnungShort description of the drawing
[0012] Die Erfindung wird nachfolgend anhand eines in der Zeichnung illustrierten Ausführungsbeispiels näher erläutert. Die einzige Figur zeigt eine Gasturbogruppe vor und nach einer erfindungsgemässen Modifikation des Verdichters. Die Zeichnung und das Ausführungsbeispiel sind dabei rein beispielhaft zu verstehen; zum Verständnis der Erfindung nicht notwendige Elemente sind weggelassen worden.The invention will be explained in more detail with reference to an embodiment illustrated in the drawing. The single FIGURE shows a gas turbine group before and after an inventive modification of the compressor. The drawing and the embodiment are to be understood as purely exemplary; Elements not necessary for understanding the invention have been omitted.
Weg zur Ausführung der ErfindungWay to carry out the invention
[0013] Die Figur 1a zeigt eine Gasturbogruppe, umfassend einen Verdichter 1 , eine Brennkammer 2, und eine Turbine 3, wie sie dem Fachmann ohne Weiteres geläufig ist. Im Betrieb der Gasturbogruppe saugt der Verdichter 1 einen Ansaugvolumenstrom respektive einen Nennmassenstrom mi an. Dieser Luftmassenstrom wird im Verdichter 1 verdichtet. In der verdichteten Verbrennungsluft wird in der Brennkammer 2 ein Brennstoffmassenstrom verbrannt, und das entstehende heisse Rauchgas wird in der Turbine 3 arbeitsleistend entspannt. Am Verdichter 1 sind Abblaseleitungen 11 und 12 mit Absperrorganen 21 und 22 angeordnet. Wie einleitend dargestellt, dienen diese Abblaseleitungen dazu, während des Anfahrens des Verdichters bei Drehzahlen deutlich unterhalb der Nenndrehzahl teilverdichtete Luft aus dem Verdichter abzublasen.Figure 1a shows a gas turbine group, comprising a compressor 1, a combustion chamber 2, and a turbine 3, as is well known to those skilled in the art. During operation of the gas turbine group, the compressor 1 sucks in an intake volume flow or a nominal mass flow mi. This air mass flow is compressed in the compressor 1. In the compressed combustion air, a fuel mass flow is burned in the combustion chamber 2, and the resulting hot flue gas is expanded to perform work in the turbine 3. At the compressor 1 blow-off lines 11 and 12 are arranged with shut-off elements 21 and 22. As stated in the introduction, these blow-off pipes serve to blow off partially compressed air from the compressor during start-up of the compressor at speeds well below the rated speed.
[0014] In der Figur 1 b ist die Gasturbogruppe nach einer erfindungsgemässen Modifikation des Verdichters 1 dargestellt. Durch eine Ausstattung mit verbesserten Verdichterschaufeln steigt der Ansaugvolumenstrom des Verdichters 1 , und entsprechend fördert der Verdichter einen Nennmassenstrom ιτi2, der grösser ist als der Nennmassenstrom mi vor dem Umbau. Die Vergrösserung des Nennmassenstroms führt dazu, dass der während des Anfahrens abgeblasene Luftmassenstrom anteilsmässig geringer ist als vor dem Umbau auf neue Schaufeln. Dies resultiert potenziell darin, dass trotz des Abblasens von Verdichterluft Strömungsabrisse in den vorderen Verdichterstufen und/oder ein Verstopfen der hinteren Verdichterstufen auftreten. Erfindungsgemäss sind nun die Abblasekapazitäten des Verdichters vergrössert worden. Das Abblaseventil 21 der Abblaseleitung 11 ist durch ein Abblaseventil 21a mit vergrössertem Durchtrittquerschnitt ersetzt. Weiterhin ist eine neue Abblaseleitung 13 mit einem Abblaseventil 23 neu angeordnet worden. Die Abblaseleitung 13 kann an einer Druckstufe des Verdichters abzweigen, an der bereits eine andere Abblaseleitung angeordnet ist, wie dies in der Figur dargestellt ist. Die Abblaseleitung 13 kann aber ohne weiteres auch an einer Stelle des Verdichters angeordnet sein, an welcher vorher keine Abblaseleitung angeordnet war. Weiterhin kann die Abblaseleitung 13 einerseits an einer bereits vorhandenen, vorher aber durch einen Flanschdeckel verschlossenen Öffnung des Gehäuses des Kompressors 1 anschliessen; gegebenenfalls kann aber auch eine neue Öffnung in das Gehäuse eingearbeitet worden sein, an welchen sich dann die neue Abblaseleitung 13 anschliesst. Zusätzlich schliesst sich stromab des Verdichters 1 und stromauf der Brennkammer 2 eine weitere Abblaseleitung 14 mit einem Abblaseventil 24 an. Durch Abblasen an dieser Stelle wird das Gesamtdruckverhältnis der Verdichters vermindert, was die Ablösegefahr weiter verringert. Durch diese Modifikation kann insgesamt ein wesentlich grosserer Massenstrom durch die Abblaseleitungen 11, 12, 13 und 14 durchgesetzt werden.In the figure 1 b, the gas turbine group is shown according to an inventive modification of the compressor 1. By equipping with improved compressor blades increases the intake volumetric flow of the compressor 1, and accordingly promotes the compressor a nominal mass flow ιτi2, which is greater than the nominal mass flow mi before the conversion. The increase in the nominal mass flow causes the air mass flow blown off during start-up to be proportionate less than before conversion to new blades. This potentially results in the occurrence of stalling in the front compressor stages and / or clogging of the rear compressor stages despite compressor air blow-off. According to the invention, the blow-off capacities of the compressor have now been increased. The blow-off valve 21 of the blow-off line 11 is replaced by a blow-off valve 21a with an enlarged passage cross-section. Furthermore, a new blow-off line 13 has been rearranged with a blow-off valve 23. The blow-off line 13 can branch off at a pressure stage of the compressor, on which another blow-off line is already arranged, as shown in the figure. The blow-off line 13 may, however, also be arranged at a location of the compressor at which no blow-off line was previously arranged. Furthermore, the blow-off line 13 on the one hand connect to an already existing, but previously closed by a flange cover opening of the housing of the compressor 1; If appropriate, however, a new opening may also have been incorporated into the housing, to which the new discharge line 13 then adjoins. In addition, downstream of the compressor 1 and upstream of the combustion chamber 2, a further blow-off line 14 connects with a blow-off valve 24. By blowing off at this point, the total pressure ratio of the compressor is reduced, which further reduces the risk of separation. Through this modification, a substantially larger mass flow through the blow-off lines 11, 12, 13 and 14 can be enforced overall.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
[0015] 1 Verdichter, Kompressor, Turbokompressor1 compressor, compressor, turbo compressor
[0016] 2 Brennkammer2 combustion chamber
[0017] 3 Turbine3 turbine
[0018] 11 Abblaseleitung[0018] Blow-off line
[0019] 12 Abblaseleitung12 blow-off line
[0020] 13 Abblaseleitung[0020] 13 blow-off line
[0021] 14 Abblaseleitung [0022] 21 Absperrorgan, Abblaseventil[0021] Blow-off line 21 shut-off valve, blow-off valve
[0023] 21a Absperrorgan, Abblaseventil21a shut-off valve, blow-off valve
[0024] 22 Absperrorgan, Abblaseventil22 shut-off valve, blow-off valve
[0025] 23 Absperrorgan, Abblaseventil23 shut-off valve, blow-off valve
[0026] 24 Absperrorgan, Abblaseventil24 shut-off valve, blow-off valve
[0027] mi Ansaugmassenstrom vor der ModifikationMi Ansaugmassenstrom before the modification
[0028] nri2 Ansaugmassenstrom nach der Modifikation Nri2 Ansaugmassenstrom after the modification

Claims

Ansprüche claims
1. Verfahren zur Modifikation eines Turbokompressors (1), umfassend, erste Schaufeln eines Kompressors auszubauen und durch zweite Schaufeln zu ersetzen, wodurch der Ansaugvolumenstrom des Verdichters bei gleicher Drehzahl und gleichem Druckverhältnis gesteigert wird, gekennzeichnet dadurch, die Kapazität zum Abblasen von verdichtetem oder teilverdichtetem Fluid zu erhöhen.A method of modifying a turbocompressor (1) comprising expanding first blades of a compressor and replacing them with second blades, thereby increasing the intake volumetric flow of the compressor at the same speed and pressure ratio, characterized by the capacity to blow off compacted or partially compressed air Increase fluid.
2. Verfahren gemäss Anspruch 1 , gekennzeichnet dadurch, die Abblasekapazität im selben Verhältnis zu erhöhen wie den Ansaugvolumenstrom.2. The method according to claim 1, characterized by increasing the Abblasekapazität in the same ratio as the Ansaugvolumenstrom.
3. Verfahren gemäss einem der Ansprüche 1 oder 2, gekennzeichnet dadurch, den Durchströmungsquerschnitt wenigstens einer an den Kompressor angeschlossen Abblaseleitung (11) zu vergrössern.3. The method according to any one of claims 1 or 2, characterized by the flow cross-section of at least one connected to the compressor blow-off line (11) to enlarge.
4. Verfahren gemäss einem der vorstehenden Ansprüchen, gekennzeichnet dadurch, wenigstens einen vorhandenen Gehäuseflansch des Kompressorgehäuses zu öffnen und eine zusätzliche Abblaseleitung (13) an der dadurch entstandenen Gehäuseöffnung anzuschliessen.4. The method according to any one of the preceding claims, characterized by opening at least one existing housing flange of the compressor housing and connect an additional blow-off line (13) to the resulting housing opening.
5. Verfahren gemäss einem der vorstehenden Ansprüche, gekennzeichnet dadurch, wenigstens eine zusätzliche Öffnung in das Kompressorgehäuse einzuarbeiten, und eine zusätzliche Abblaseleitung (13) an dieser Öffnung anzuordnen.5. The method according to any one of the preceding claims, characterized by incorporating at least one additional opening in the compressor housing, and to arrange an additional blow-off line (13) at this opening.
6. Verfahren gemäss einem der vorstehenden Ansprüche, wobei der Kompressor stromauf eines Verbrauchers (2, 3) angeordnet ist, gekennzeichnet dadurch, eine Abblaseleitung (14) stromab des Kompressors und stromauf des Verbrauchers anzuordnen.6. The method according to any one of the preceding claims, wherein the compressor is arranged upstream of a consumer (2, 3), characterized by arranging a blow-off line (14) downstream of the compressor and upstream of the consumer.
7. Verfahren gemäss einem der vorstehenden Ansprüche, wobei der Kompressor ein Kompressor einer Gasturbogruppe ist, gekennzeichnet dadurch, eine Abblaseleitung (14) stromab des Kompressors (1) und stromauf einer ersten Brennkammer (2) der Gasturbogruppe anzuordnen.7. The method according to any one of the preceding claims, wherein the compressor is a compressor of a gas turbine group, characterized characterized, a blow-off line (14) downstream of the compressor (1) and upstream of a first To arrange combustion chamber (2) of the gas turbine group.
8. Turbokompressor, welcher mit einem Verfahren gemäss einem der vorstehenden Ansprüche modifiziert ist.8. turbo compressor, which is modified by a method according to any one of the preceding claims.
9. Gasturbogruppe, umfassend einen Kompressor gemäss Anspruch 8.9. gas turbine group, comprising a compressor according to claim 8.
10. Kraftwerksanlage, umfassend eine Gasturbogruppe gemäss Anspruch 9. 10. Power plant, comprising a gas turbine group according to claim 9.
EP05776213.0A 2004-07-26 2005-07-14 Method for modifying a turbocompressor Not-in-force EP1771663B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004036238A DE102004036238A1 (en) 2004-07-26 2004-07-26 Method for modifying a turbocompressor
PCT/EP2005/053378 WO2006010712A1 (en) 2004-07-26 2005-07-14 Method for modifying a turbocompressor

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EP1771663A1 true EP1771663A1 (en) 2007-04-11
EP1771663B1 EP1771663B1 (en) 2013-11-13

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US (1) US7628576B2 (en)
EP (1) EP1771663B1 (en)
KR (1) KR101243393B1 (en)
DE (1) DE102004036238A1 (en)
PE (1) PE20060248A1 (en)
TW (1) TWI356878B (en)
WO (1) WO2006010712A1 (en)

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Publication number Priority date Publication date Assignee Title
WO2010044493A1 (en) * 2008-10-13 2010-04-22 Kturbo, Inc. Blow-off system for multi-stage turbo compressor

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GB777955A (en) * 1954-07-06 1957-07-03 Ruston & Hornsby Ltd Improvements in or relating to fluid flow machines such as hydraulic, steam or gas turbines or axial-flow compressors
DE1070880B (en) * 1956-12-19 1959-12-10 Rolls-Royce Limited, Derby (Großbritannien) Gas turbine unit with turbo compressor
DE1107887B (en) * 1957-04-16 1961-05-31 Power Jets Res & Dev Ltd Controller to prevent pumping in flow compressors
DE3313321A1 (en) * 1983-04-13 1984-10-18 Klöckner-Humboldt-Deutz AG, 5000 Köln Blow-off device on a multistage axial compressor
GB2158879B (en) * 1984-05-19 1987-09-03 Rolls Royce Preventing surge in an axial flow compressor
JP2619360B2 (en) * 1986-02-21 1997-06-11 株式会社日立製作所 Surging prevention device for turbo compressor
US5520512A (en) * 1995-03-31 1996-05-28 General Electric Co. Gas turbines having different frequency applications with hardware commonality
DE19541192C2 (en) * 1995-11-04 1999-02-04 Ghh Borsig Turbomaschinen Gmbh Process for protecting a turbo compressor from operation in an unstable working area by means of a blow-off device
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See references of WO2006010712A1 *

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KR20070038527A (en) 2007-04-10
DE102004036238A1 (en) 2006-02-16
WO2006010712A1 (en) 2006-02-02
TWI356878B (en) 2012-01-21
US20070128024A1 (en) 2007-06-07
PE20060248A1 (en) 2006-04-12
TW200622107A (en) 2006-07-01
EP1771663B1 (en) 2013-11-13
US7628576B2 (en) 2009-12-08
KR101243393B1 (en) 2013-03-13

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