EP2859193A1 - Sealing arrangement of a steam turbine in which a sealing liquid and a vapour extraction system is used - Google Patents
Sealing arrangement of a steam turbine in which a sealing liquid and a vapour extraction system is usedInfo
- Publication number
- EP2859193A1 EP2859193A1 EP13729704.0A EP13729704A EP2859193A1 EP 2859193 A1 EP2859193 A1 EP 2859193A1 EP 13729704 A EP13729704 A EP 13729704A EP 2859193 A1 EP2859193 A1 EP 2859193A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- sealing
- seal
- shaft
- power plant
- 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.)
- Withdrawn
Links
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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
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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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Definitions
- the invention relates to a sealing arrangement for a
- the invention further relates to a method for sealing a shaft and the housing of a steam turbine.
- turbomachinery especially in steam turbine, they are designed such that a seal is realized so that no ambient air can penetrate into the steam turbine.
- various types of gaskets are used.
- sealing steam is used to prevent air from entering the turbine.
- the sealing steam used for this purpose is removed from the steam cycle and thus does not contribute to the energy conversion, with the result that the efficiency of the entire turbine train is deteriorated.
- FIG. 1 shows the known state of the art.
- a trained for low pressure steam turbine 4 is supplied via an inlet opening 10 with live steam.
- the generation of the live steam is not shown in detail in FIG.
- a portion of the live steam is fed to a branch 11 via a bleed line 7a to the seal 9.
- the tapping line 7a is thus designed as a sealing steam line 12 and thus conducts sealing steam in a sealing steam region 13.
- the sealing steam moves through seals to the left and to the right, wherein a flow of the sealing vapor leads to the left in a Wrasendampfsch 14.
- the steam whose thermal energy is converted into mechanical energy in the steam turbine 4, flows via an outlet opening 15 to a condenser 5.
- the steam condenses to water and is fed back to the steam cycle via a pump 6.
- a sealing arrangement for carrying out a shaft rotating about an axis by a fixed housing which encloses an acted upon with a fluid interior, from which the shaft emerges, with a seal which comprises a Wrasendampfabsaugung, wherein an introduction, the is arranged between the interior and the Wrasendampfabsaugung and is designed for the supply of a barrier liquid, wherein the barrier liquid undergoes a phase change after the supply.
- the object is achieved by a steam power plant comprising a steam turbine with a sealing arrangement according to the invention. Furthermore, the object is achieved by a method for sealing a shaft and the housing of a steam turbine, wherein a Wrasendampfabsaugung provided and a barrier liquid is used.
- the invention thus proposes to minimize the losses by completely dispensing with the use of sealing vapor. Rather, the invention proposes to use a barrier liquid instead of barrier vapor.
- a barrier liquid for example, water is used.
- the advantage therefore lies in the fact that a previously required sealing steam system of a steam turbine train can be completely eliminated. This leads to the saving of costs, which inevitably result from a boil- ing of the sealing steam system.
- the sealing steam which has not previously participated in the energy conversion, now participate in the energy conversion, which leads to an increase in the efficiency.
- advantageous developments are given.
- a labyrinth seal is used to minimize the loss of barrier fluid.
- the steam turbine is connected to a capacitor, wherein for the
- Barrier liquid required water is removed from the condenser.
- the water can be taken directly from the steam cycle.
- the introduction is connected to the hot well of the capacitor.
- FIG. 2 shows a sectional view through a schematically illustrated steam turbine
- Figure 3 is a schematic representation of a seal according to the invention.
- FIG. 2 shows schematically a shaft 16 of a steam turbine 4.
- a plurality of blades 17 are arranged, between which a plurality of guide vanes 18 are fixedly arranged on a housing 19.
- a first seal 3 is arranged.
- a second seal 2 and a third seal 1 are arranged.
- Process steam can flow out between the first seal 3 and the shaft 16. Therefore, a barrier fluid from a bleed line 7 is flowed between the second seal 2 and the first seal 3. This can expand to the environment 21 and the flow channel 20.
- a Wrasendampfabsaugung 8 is arranged between the third seal 1 and the second seal 2 .
- no process steam can flow from the flow channel 20 into the environment 21.
- the tapping line 7 is connected to the outlet of the pump 6, so that, instead of a sealing steam, a barrier liquid comes onto the shaft.
- the first seal 3, the second seal 2 and the third seal 1 thus form a seal arrangement 22.
- a bushing 23 of a shaft 16 rotating about an axis is realized by a stationary housing (not shown in more detail).
- a fluidizable interior space is included, from which the shaft 16 protrudes.
- seals conventional labyrinth seals, metallic bristle brush seals, natural fiber bristle brush seals, and / or artificial fiber bristle brush seals (aramid) may be used.
- simple annular gaps or conical annular gaps are possible as seals.
- a barrier liquid As a barrier liquid, a deionized or feed water is used. This barrier liquid is already present in a steam power plant, so that no additional barrier fluid sources must be taken into account.
- feed water is advantageous close because it is available in spatial proximity to the steam turbine 4, z.
- the elevation of the pressure level to supply the sealing area can be done either by an auxiliary unit or by the existing pumps to promote the feedwater to the condenser 5. Simple control mechanisms ensure that the pressure difference between atmosphere and barrier fluid is low. Thus, the amount of fluid used for blocking can be kept low. A particular advantage when using synthetic fibers such. B. in stuffing boxes in the field of sealing steam turbines 4 can be realized.
- the properties of the synthetic fiber package can have a positive effect compared with other possible solutions because they have a very large evaporation surface due to the small fiber diameter and good transport properties via the capillary action.
- the low adhesion tendency in comparison with other fibers can be further improved by means of suitable coating systems of the fiber.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Devices (AREA)
- Mechanical Sealing (AREA)
Abstract
Description
Beschreibung description
DICHTUNGSANORDNUNG EINER DAMPFTURBINE WOBEI EINE SPERRFLÜSSIGKEIT UND EINE WRASENDAMPFABSAUGUNG VERWENDET WIRD SEALING ARRANGEMENT OF A STEAM TURBINE USING A LUBRICATING LIQUID AND A WRASTENAMPFABSAUGUNG IS USED
Die Erfindung betrifft eine Dichtungsanordnung für eine The invention relates to a sealing arrangement for a
Durchführung einer um eine Achse rotierenden Welle durch ein feststehendes Gehäuse, welches einen mit einem Fluid beaufschlagbaren Innenraum umschließt, aus dem die Welle austritt, mit einer Dichtung, welche eine Wrasendampfabsaugung umfasst. Carrying out a shaft rotating about an axis by a fixed housing, which encloses an acted upon by a fluid interior, from which the shaft emerges, with a seal which comprises a Wrasendampfausaugung.
Die Erfindung betrifft ferner ein Verfahren zur Abdichtung einer Welle und des Gehäuses einer Dampfturbine. Im Strömungsmaschinenbau, insbesondere im Dampfturbinenbau, werden diese derart ausgeführt, dass eine Abdichtung realisiert wird, so dass keine Umgebungsluft in die Dampfturbine eindringen kann. Dazu werden verschiedenartige Dichtungen verwendet. Beispielsweise wird Sperrdampf dazu verwendet, ein Eintreten der Luft in die Turbine zu verhindern. Allerdings wird der dazu verwendete Sperrdampf aus dem Dampfkreislauf entnommen und trägt somit nicht zur Energiewandlung bei, was dazu führt, dass der Wirkungsgrad des gesamten Turbinenstrangs verschlechtert wird. The invention further relates to a method for sealing a shaft and the housing of a steam turbine. In turbomachinery, especially in steam turbine, they are designed such that a seal is realized so that no ambient air can penetrate into the steam turbine. For this purpose, various types of gaskets are used. For example, sealing steam is used to prevent air from entering the turbine. However, the sealing steam used for this purpose is removed from the steam cycle and thus does not contribute to the energy conversion, with the result that the efficiency of the entire turbine train is deteriorated.
Die Figur 1 zeigt den bekannten Stand der Technik. Eine für Niederdruck ausgebildete Dampfturbine 4 wird über eine Einströmöffnung 10 mit Frischdampf versorgt. Die Erzeugung des Frischdampfes ist in der Figur 1 nicht näher dargestellt. Ein Teil des Frischdampfes wird an einer Abzweigung 11 über eine Anzapfleitung 7a zur Dichtung 9 geführt. Die Anzapfleitung 7a ist demnach als Sperrdampfleitung 12 ausgebildet und führt somit Sperrdampf in einen Sperrdampfbereich 13. Im Sperrdampfbereich 13 bewegt sich der Sperrdampf durch Dichtungen nach links und nach rechts, wobei eine Strömung des Sperrdampfes nach links in eine Wrasendampfkammer 14 führt. In dieser Wrasendampfkammer 14 herrscht ein geringfügig niedrigerer Druck als in der Umgebung, so dass eine Wrasendampfab- saugung 8 die Mischung aus aus der Umgebung angesaugten Luft und des aus dem Sperrdampfbereich 13 geführten Dampfes abgesaugt wird. Somit kann ein in der Dampfturbine 4 geführter Dampf nicht in die Umgebung austreten. FIG. 1 shows the known state of the art. A trained for low pressure steam turbine 4 is supplied via an inlet opening 10 with live steam. The generation of the live steam is not shown in detail in FIG. A portion of the live steam is fed to a branch 11 via a bleed line 7a to the seal 9. The tapping line 7a is thus designed as a sealing steam line 12 and thus conducts sealing steam in a sealing steam region 13. In the sealing steam region 13, the sealing steam moves through seals to the left and to the right, wherein a flow of the sealing vapor leads to the left in a Wrasendampfkammer 14. In this Wrasendampfkammer 14 there is a slightly lower pressure than in the environment, so that a Wrasendampfab- suction 8, the mixture is sucked out of the ambient air sucked in and out of the sealing steam region 13 steam. Thus, a guided in the steam turbine 4 steam can not escape into the environment.
Der Dampf, dessen thermische Energie in der Dampfturbine 4 in mechanische Energie umgewandelt wird, strömt über eine Auslassöffnung 15 zu einem Kondensator 5. In dem Kondensator 5 kondensiert der Dampf zu Wasser und wird über eine Pumpe 6 dem Wasserdampfkreislauf wieder zugeführt. Der Druck desThe steam, whose thermal energy is converted into mechanical energy in the steam turbine 4, flows via an outlet opening 15 to a condenser 5. In the condenser 5, the steam condenses to water and is fed back to the steam cycle via a pump 6. The pressure of
Sperrdampfes ist über dem Druck der Atmosphäre. Um den Bedarf an Sperrdampf und die damit verbundenen Verluste möglichst gering zu halten, werden Dichtungen eingebaut, die möglichst effizient sind. Dies kann erfolgen durch Dichtungen großer Baulänge oder durch hocheffiziente Dichtungssysteme, wie z. B. die Bürstendichtungen. In den Dokumenten US 6,918,252, DE 43 13 805, US 4,191,021 und DE 10 2007 037311 sind verschiedene Dichtungsmöglichkeiten offenbart. Mit der Erfindung wird nun ein neuer Weg eingeschlagen, die die des erforderlichen Sperrdampfes ermöglichen soll. Somit lautet die Aufgabe der Erfindung, den Wirkungsgrad einer Dampfturbine zu erhöhen. Gelöst wird diese Aufgabe durch eine Dichtungsanordnung für eine Durchführung einer um eine Achse rotierenden Welle durch ein feststehendes Gehäuse, welches einen mit einem Fluid beaufschlagbaren Innenraum umschließt, aus dem die Welle austritt, mit einer Dichtung, welche eine Wrasendampfabsaugung umfasst, wobei eine Einleitung, die zwischen dem Innenraum und der Wrasendampfabsaugung angeordnet ist und für die Zuführung einer Sperrflüssigkeit ausgebildet ist, wobei die Sperrflüssigkeit nach der Zuführung einen Phasenwechsel erfährt . Catching vapor is above the pressure of the atmosphere. To keep the need for sealing steam and the associated losses as low as possible, seals are installed, which are as efficient as possible. This can be done by seals of great length or by highly efficient sealing systems, such. B. the brush seals. In the documents US 6,918,252, DE 43 13 805, US 4,191,021 and DE 10 2007 037311 various sealing possibilities are disclosed. With the invention, a new way is now taken, which should enable the required sealing steam. Thus, the object of the invention is to increase the efficiency of a steam turbine. This object is achieved by a sealing arrangement for carrying out a shaft rotating about an axis by a fixed housing which encloses an acted upon with a fluid interior, from which the shaft emerges, with a seal which comprises a Wrasendampfabsaugung, wherein an introduction, the is arranged between the interior and the Wrasendampfabsaugung and is designed for the supply of a barrier liquid, wherein the barrier liquid undergoes a phase change after the supply.
Des Weiteren wird die Aufgabe gelöst durch eine Dampfkraftan- lage umfassend eine Dampfturbine mit einer erfindungsgemäßen Dichtungsanordnung . Des Weiteren wird die Aufgabe gelöst durch ein Verfahren zur Abdichtung einer Welle und des Gehäuses einer Dampfturbine, wobei eine Wrasendampfabsaugung vorgesehen und eine Sperr- flüssigkeit verwendet wird. Furthermore, the object is achieved by a steam power plant comprising a steam turbine with a sealing arrangement according to the invention. Furthermore, the object is achieved by a method for sealing a shaft and the housing of a steam turbine, wherein a Wrasendampfabsaugung provided and a barrier liquid is used.
Die Erfindung schlägt somit vor, die Verluste zu minimieren, indem auf die Verwendung von Sperrdampf gänzlich verzichtet wird. Vielmehr schlägt die Erfindung vor, anstelle von Sperr- dampf eine Sperrflüssigkeit zu verwenden. Als Sperrflüssigkeit wird beispielsweise Wasser verwendet. Der Vorteil liegt somit darin, dass ein vorher benötigtes SperrdampfSystem eines Dampfturbinenstranges gänzlich entfallen kann. Das führt zur Einsparung von Kosten, die sich aus einer Verroh- rung des SperrdampfSystems zwangsläufig ergeben. Somit kann der Sperrdampf, der vorher nicht an der Energieumwandlung teilgenommen hat, nunmehr an der Energieumwandlung teilnehmen, was zu einer Erhöhung des Wirkungsgrades führt. In den Unteransprüchen sind vorteilhafte Weiterbildungen angegeben . The invention thus proposes to minimize the losses by completely dispensing with the use of sealing vapor. Rather, the invention proposes to use a barrier liquid instead of barrier vapor. As a barrier liquid, for example, water is used. The advantage therefore lies in the fact that a previously required sealing steam system of a steam turbine train can be completely eliminated. This leads to the saving of costs, which inevitably result from a boil- ing of the sealing steam system. Thus, the sealing steam, which has not previously participated in the energy conversion, now participate in the energy conversion, which leads to an increase in the efficiency. In the dependent claims advantageous developments are given.
So wird in einer ersten vorteilhaften Weiterbildung eine Labyrinthdichtung verwendet, um den Verlust an Sperrflüssig- keit zu minimieren. Thus, in a first advantageous development, a labyrinth seal is used to minimize the loss of barrier fluid.
In weiteren vorteilhaften Weiterbildungen wird die Dampfturbine mit einem Kondensator verbunden, wobei das für die In further advantageous developments, the steam turbine is connected to a capacitor, wherein for the
Sperrflüssigkeit benötigte Wasser aus dem Kondensator entnom- men wird. Somit kann das Wasser direkt aus dem Wasserdampf- kreislauf entnommen werden. Vorteilhafterweise wird die Einleitung mit dem Hotwell des Kondensators verbunden. Barrier liquid required water is removed from the condenser. Thus, the water can be taken directly from the steam cycle. Advantageously, the introduction is connected to the hot well of the capacitor.
In einer besonderen vorteilhaften Weiterbildung wird die Dampfkraftanlage derart weitergebildet, dass das Wasser und die Welle derartige Temperaturen aufweisen, dass das Wasser beim Auftreffen auf die Welle bzw. bei Passieren der Dichtung verdampft. Dadurch ist eine sehr gute Kühl- und Abdichtmöglichkeit gegeben. In a particularly advantageous development of the steam power plant is further developed such that the water and the shaft have such temperatures that the water when hitting the shaft or when passing the seal evaporated. This gives a very good cooling and sealing possibility.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Figuren 2 und 3 dargestellt. An embodiment of the invention is illustrated below with reference to Figures 2 and 3.
Es zeigen Show it
Figur 2 eine Schnittdarstellung durch eine schematisch dar- gestellte Dampfturbine, FIG. 2 shows a sectional view through a schematically illustrated steam turbine,
Figur 3 eine schematische Darstellung einer erfindungsgemäßen Dichtung. Figure 3 is a schematic representation of a seal according to the invention.
Die Figur 2 zeigt in schematischer Weise eine Welle 16 einer Dampfturbine 4. Auf der Welle 16 sind mehrere Laufschaufeln 17 angeordnet, zwischen denen mehrere Leitschaufeln 18 an einem Gehäuse 19 fest angeordnet sind. Damit der in einem Strömungskanal 20 befindliche Prozessdampf nicht in die Umgebung 21 strömt, ist eine erste Dichtung 3 angeordnet. Zur Umgebung 21 hin sind mit einem Abstand versehen eine zweite Dichtung 2 und eine dritte Dichtung 1 angeordnet. Zwischen der ersten Dichtung 3 und der Welle 16 kann Prozessdampf ausströmen. Deswegen wird zwischen der zweiten Dichtung 2 und der ersten Dichtung 3 eine Sperrflüssigkeit aus einer Anzapfleitung 7 beströmt . Diese kann sich zur Umgebung 21 und zum Strömungskanal 20 ausdehnen. Zwischen der dritten Dich- tung 1 und der zweiten Dichtung 2 wird eine Wrasendampfabsaugung 8 angeordnet. Somit kann kein Prozessdampf aus dem Strömungskanal 20 in die Umgebung 21 strömen. 2 shows schematically a shaft 16 of a steam turbine 4. On the shaft 16 a plurality of blades 17 are arranged, between which a plurality of guide vanes 18 are fixedly arranged on a housing 19. So that the process steam located in a flow channel 20 does not flow into the environment 21, a first seal 3 is arranged. To the environment 21 out with a distance provided a second seal 2 and a third seal 1 are arranged. Process steam can flow out between the first seal 3 and the shaft 16. Therefore, a barrier fluid from a bleed line 7 is flowed between the second seal 2 and the first seal 3. This can expand to the environment 21 and the flow channel 20. Between the third seal 1 and the second seal 2 a Wrasendampfabsaugung 8 is arranged. Thus, no process steam can flow from the flow channel 20 into the environment 21.
Gemäß Figur 3 wird nun erfindungsgemäß die Anzapfleitung 7 mit dem Ausgang der Pumpe 6 verbunden, so dass statt eines Sperrdampfes eine Sperrflüssigkeit auf die Welle kommt. Die erste Dichtung 3, die zweite Dichtung 2 und die dritte Dichtung 1 bilden somit eine Dichtungsanordnung 22. Mit dieser Dichtungsanordnung 22 wird eine Durchführung 23 einer um eine Achse rotierenden Welle 16 durch ein feststehendes Ge- häuse (nicht näher dargestellt) realisiert. In diesem feststehenden Gehäuse ist ein mit Fluid beaufschlagbarer Innenraum eingeschlossen, aus dem die Welle 16 herausragt. Als Dichtungen können herkömmliche Labyrinthdichtungen, Bürstendichtungen mit metallischen Borsten, Bürstendichtungen mit Borsten aus natürlichen Fasern und/oder Bürstendichtungen mit Borsten aus künstlichen Fasern (Aramid) verwendet werden. Darüber hinaus sind einfache Ringspalte oder konische Ringspalte als Dichtungen möglich. Als Sperrflüssigkeit wird ein Deionat bzw. Speisewasser verwendet. Diese Sperrflüssigkeit ist ohnehin in einem Dampfkraftwerk vorhanden, so dass keine zusätzlichen Sperrflüssig- keitsquellen berücksichtigt werden müssen. Die Nutzung von Speisewasser ist vorteilhaft nahe, da diese in räumlicher Nähe zur Dampfturbine 4 zur Verfügung steht, z. B. im Hotwell des Kondensators 5. Die Anhebung des Druckniveaus zur Versorgung des Dichtungsbereichs kann entweder durch ein Hilfsaggregat oder durch die vorhandenen Pumpen zur Abförderung des Speisewassers am Kondensator 5 erfolgen. Einfache Regelmechanismen tragen dafür Sorge, dass der Druckunterschied zwischen Atmosphäre und Sperrflüssigkeit nur gering ausfällt. Somit kann die Menge des zur Sperrung verwendeten Fluids gering gehalten werden. Ein besonderer Vorteil kann beim Einsatz von Kunstfasern wie z. B. in Stopfbuchsen im Bereich der Abdichtung von Dampfturbinen 4 realisiert werden. Hierbei wird das eingebrachte Wasser einer definierten Temperatur in der Nähe des Siedepunktes bei einem Druck zwischen dem Druck des Dichtfluides und dem des abzudichtenden Dampfraums, der im Vakuum ist, durch den Druckunterschied auf der durchwärmten Welle verdampft. Die begleitende, über das Faserpaket stetige Volumenzunahme, die bei einem Faktor um die 1000 liegt, führt bei stark reduziertem Dichtfluidbedarf zu einer optimalen Dichtwirkung der Stopfbuchse. According to FIG. 3, according to the invention, the tapping line 7 is connected to the outlet of the pump 6, so that, instead of a sealing steam, a barrier liquid comes onto the shaft. The first seal 3, the second seal 2 and the third seal 1 thus form a seal arrangement 22. With this seal arrangement 22, a bushing 23 of a shaft 16 rotating about an axis is realized by a stationary housing (not shown in more detail). In this fixed housing, a fluidizable interior space is included, from which the shaft 16 protrudes. As seals, conventional labyrinth seals, metallic bristle brush seals, natural fiber bristle brush seals, and / or artificial fiber bristle brush seals (aramid) may be used. In addition, simple annular gaps or conical annular gaps are possible as seals. As a barrier liquid, a deionized or feed water is used. This barrier liquid is already present in a steam power plant, so that no additional barrier fluid sources must be taken into account. The use of feed water is advantageous close because it is available in spatial proximity to the steam turbine 4, z. The elevation of the pressure level to supply the sealing area can be done either by an auxiliary unit or by the existing pumps to promote the feedwater to the condenser 5. Simple control mechanisms ensure that the pressure difference between atmosphere and barrier fluid is low. Thus, the amount of fluid used for blocking can be kept low. A particular advantage when using synthetic fibers such. B. in stuffing boxes in the field of sealing steam turbines 4 can be realized. Here, the introduced water of a defined temperature in the vicinity of the boiling point at a pressure between the pressure of the sealing fluid and the vapor space to be sealed, which is in vacuum, evaporated by the pressure difference on the durchwärmten wave. The concomitant volume increase, which is constant over the fiber packet, and at one factor 1000, results in greatly reduced Dichtfluidbedarf to an optimum sealing effect of the stuffing box.
Hierbei können insbesondere die Eigenschaften des Kunstfaser- pakets gegenüber anderen möglichen Lösungen positiv wirken, da sie durch die geringen Faserdurchmesser ein sehr große Verdampfungsoberfläche sowie über die Kapillarwirkung über gute Transporteigenschaften verfügen. Die im Vergleich zu anderen Fasern geringe Adhäsionsneigung kann über geeignete Be- schichtungssysteme der Faser weiter verbessert werden. In particular, the properties of the synthetic fiber package can have a positive effect compared with other possible solutions because they have a very large evaporation surface due to the small fiber diameter and good transport properties via the capillary action. The low adhesion tendency in comparison with other fibers can be further improved by means of suitable coating systems of the fiber.
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13729704.0A EP2859193A1 (en) | 2012-07-24 | 2013-06-17 | Sealing arrangement of a steam turbine in which a sealing liquid and a vapour extraction system is used |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12177570.4A EP2690258A1 (en) | 2012-07-24 | 2012-07-24 | Steam turbine Sealing assembly whereby a liquid sealing and a blocking steam is used |
PCT/EP2013/062464 WO2014016048A1 (en) | 2012-07-24 | 2013-06-17 | Sealing arrangement of a steam turbine in which a sealing liquid and a vapour extraction system is used |
EP13729704.0A EP2859193A1 (en) | 2012-07-24 | 2013-06-17 | Sealing arrangement of a steam turbine in which a sealing liquid and a vapour extraction system is used |
Publications (1)
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EP2859193A1 true EP2859193A1 (en) | 2015-04-15 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP12177570.4A Withdrawn EP2690258A1 (en) | 2012-07-24 | 2012-07-24 | Steam turbine Sealing assembly whereby a liquid sealing and a blocking steam is used |
EP13729704.0A Withdrawn EP2859193A1 (en) | 2012-07-24 | 2013-06-17 | Sealing arrangement of a steam turbine in which a sealing liquid and a vapour extraction system is used |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP12177570.4A Withdrawn EP2690258A1 (en) | 2012-07-24 | 2012-07-24 | Steam turbine Sealing assembly whereby a liquid sealing and a blocking steam is used |
Country Status (9)
Country | Link |
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US (1) | US9885246B2 (en) |
EP (2) | EP2690258A1 (en) |
JP (1) | JP6013600B2 (en) |
KR (1) | KR20150036141A (en) |
CN (1) | CN104508252B (en) |
BR (1) | BR112015001206A2 (en) |
IN (1) | IN2014DN10804A (en) |
RU (1) | RU2612979C2 (en) |
WO (1) | WO2014016048A1 (en) |
Families Citing this family (3)
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US11549516B2 (en) | 2018-07-19 | 2023-01-10 | Ebara Corporation | Sealing system, and pump system including the sealing system |
CN112855942B (en) * | 2020-12-28 | 2022-04-12 | 东方电气集团东方汽轮机有限公司 | Shaft end sealing system of closed type circulating rotating machine |
JP7455451B1 (en) | 2023-12-14 | 2024-03-26 | 株式会社フジワラテクノアート | Rotating shaft seal structure |
Family Cites Families (35)
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US1551549A (en) * | 1925-09-01 | Sylvania | ||
US1425548A (en) * | 1917-02-23 | 1922-08-15 | Westinghouse Electric & Mfg Co | Packing |
FR632601A (en) * | 1926-04-12 | 1928-01-12 | ||
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2012
- 2012-07-24 EP EP12177570.4A patent/EP2690258A1/en not_active Withdrawn
-
2013
- 2013-06-17 WO PCT/EP2013/062464 patent/WO2014016048A1/en active Application Filing
- 2013-06-17 JP JP2015523469A patent/JP6013600B2/en not_active Expired - Fee Related
- 2013-06-17 CN CN201380039667.6A patent/CN104508252B/en not_active Expired - Fee Related
- 2013-06-17 BR BR112015001206A patent/BR112015001206A2/en not_active IP Right Cessation
- 2013-06-17 IN IN10804DEN2014 patent/IN2014DN10804A/en unknown
- 2013-06-17 US US14/415,387 patent/US9885246B2/en not_active Expired - Fee Related
- 2013-06-17 KR KR20157001550A patent/KR20150036141A/en not_active Ceased
- 2013-06-17 EP EP13729704.0A patent/EP2859193A1/en not_active Withdrawn
- 2013-06-17 RU RU2015105954A patent/RU2612979C2/en not_active IP Right Cessation
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2014016048A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN104508252A (en) | 2015-04-08 |
EP2690258A1 (en) | 2014-01-29 |
BR112015001206A2 (en) | 2017-07-04 |
US20150167485A1 (en) | 2015-06-18 |
JP6013600B2 (en) | 2016-10-25 |
RU2612979C2 (en) | 2017-03-14 |
US9885246B2 (en) | 2018-02-06 |
RU2015105954A (en) | 2016-09-10 |
IN2014DN10804A (en) | 2015-09-04 |
CN104508252B (en) | 2017-03-08 |
WO2014016048A1 (en) | 2014-01-30 |
JP2015524543A (en) | 2015-08-24 |
KR20150036141A (en) | 2015-04-07 |
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