EP2863019B1 - Seal arrangement - Google Patents
Seal arrangement Download PDFInfo
- Publication number
- EP2863019B1 EP2863019B1 EP13189280.4A EP13189280A EP2863019B1 EP 2863019 B1 EP2863019 B1 EP 2863019B1 EP 13189280 A EP13189280 A EP 13189280A EP 2863019 B1 EP2863019 B1 EP 2863019B1
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- EP
- European Patent Office
- Prior art keywords
- turbine
- annular
- ring
- seal arrangement
- circumferential surface
- 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.)
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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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
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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
- F05D2230/00—Manufacture
- F05D2230/80—Repairing, retrofitting or upgrading methods
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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
- F05D2240/55—Seals
- F05D2240/57—Leaf seals
Definitions
- the present invention relates to a sealing arrangement for sealing an annular gap present between a high-pressure steam space and an adjacently arranged low-pressure steam space, which is defined between two turbine housings divided into two housing halves, wherein the sealing arrangement has a segmented and annularly formed sealing element which, in the intended condition, is located between the two extends two turbine housings and engages with at least one of its radial end portions in an annular receiving groove.
- the present invention relates to the use of such a sealing arrangement for sealing an existing between a high-pressure steam space and an adjacent low-pressure steam chamber of a turbine annular gap, a turbine with at least two each divided into two housing halves turbine housings between them form a high pressure steam space and a low pressure steam space, said Steam chambers are separated by an annular gap defined between the turbine housings, and a method for repairing a worn seal assembly of the aforementioned type.
- annular sealing elements are used for sealing existing between two adjacent vapor chambers existing annular gaps, which are defined between two each divided into two housing halves turbine housings.
- the sealing elements usually have an I-shaped cross-section and are divided into two segments in order to assemble them.
- the opposing radial end portions of the annular sealing elements engage in annular grooves, which are formed opposite each other on the turbine housings or on their respective housing halves.
- EP2351910 (D1 ) discloses such a sealing arrangement for sealing an annular gap present between a high-pressure steam space and an adjacently arranged low-pressure steam space.
- the sealing elements and in particular the annular grooves are subject to wear during turbine operation by steam erosion and by mechanical loads.
- the present invention provides a seal assembly of the type mentioned above, which is characterized in that the seal assembly has at least one segmented ring, the first peripheral surface fixed in the intended condition on one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided either with the annular receiving groove or in one-piece construction with the radially projecting annular sealing element.
- the main advantage of the sealing arrangement according to the invention is that in a major overhaul, for example after 100,000 operating hours, not only the sealing element but also the at least one segmented ring can be completely replaced. Accordingly, an inspection, an inspection of the wear as well as complex repair work can be dispensed with. In addition, a targeted, predictable and cost-effective replacement solution is also possible for the second revision interval, which is beneficial to the planning reliability with respect to the effort to be operated and also the downtime.
- the sealing arrangement comprises a first ring whose first peripheral surface is fastened in the intended state to one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided with the annular receiving groove, and a second ring whose first peripheral surface fixed in the intended condition on the other turbine housing releasably secured in the region of the annular gap relative to the first ring and its opposite second peripheral surface is provided with an annular receiving groove, wherein the sealing element is formed as a separate component and engages in the intended condition in the annular grooves of both rings.
- the seal assembly in this variant comprises a three-part structure with two segmented rings, which serve on the one hand for attachment to the turbine housings and on the other define the annular grooves, and a trained as a separate component sealing element which engages in the intended condition in the two grooves ,
- the sealing arrangement comprises a first ring whose first peripheral surface is fastened in the intended state to one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided with an annular receiving groove, and a second ring whose first peripheral surface fixed in the intended state to the other turbine housing releasably secured in the region of the annular gap relative to the first ring and the opposite second peripheral surface is formed with the radially projecting annular sealing element, wherein the integrally formed with the second ring sealing element in the intended condition in the annular receiving groove of the first ring attacks.
- the seal assembly thus comprises only two components each formed segmented, namely a first ring with one piece trained and radially projecting sealing element and a second ring which defines the annular receiving groove into which the sealing element engages in the intended condition.
- the ring or rings are made of steel.
- the sealing element in the region of its free end on a rounded and widened trained end portion which engages in the intended state in the associated annular receiving groove. Thanks to the rounding a good fit of the sealing element is ensured in the associated annular receiving groove. If the sealing element is a separate component, correspondingly formed end sections can, of course, be provided at both free ends of the sealing element.
- the end portion is formed in cross-section substantially oval. Particularly good results were achieved with this mold.
- the present invention further relates to the use of a sealing arrangement according to the invention for sealing an existing between a high-pressure steam space and an adjacent low pressure steam space of a turbine annular gap which is defined between two each divided into two housing halves turbine housings of the turbine.
- the present invention provides for solving the object mentioned a turbine with at least two divided into two housing halves turbine housings, which form a high-pressure steam space and a low-pressure steam space between them, wherein the steam chambers are separated by an annular gap defined between the turbine housings, by a seal assembly according to the invention is sealed.
- the turbine according to one embodiment of the present invention is a low-pressure turbine.
- the present invention provides a method for repairing a worn seal assembly of a turbine according to the invention in which the worn seal assembly is completely replaced by a new seal assembly, in particular as part of a major overhaul of the turbine.
- FIG. 1 shows a turbine 1, which is a low-pressure steam turbine.
- the turbine 1 comprises a rotor 3 provided with blades 2, which is mounted at its free ends by means of corresponding bearings 4 and 5.
- steam flows in the direction of the arrow 6 into an inlet 7 in the blading of the rotor 3 and exits through an outlet 8 from this again.
- the turbine 1 is surrounded by an outer housing 9.
- an outer inner housing 10 and an inner inner housing 11 are provided, which are each divided into two housing halves, in this case each in an upper housing half and in a lower housing half.
- the inner housings 10 and 11 define between them a high-pressure steam space 12 and a low-pressure steam space 13 which are separated from one another by an annular gap 14 remaining between the outer inner housing 10 and the inner inner housing 11.
- This annular gap 14 is sealed by a sealing arrangement according to the invention, as described below with reference to FIGS FIGS. 2 to 5 is explained in more detail.
- FIG. 2 shows a first variant of a seal assembly 15 according to the present invention.
- the sealing arrangement 15 comprises a segmented first ring 16, the outer peripheral surface 17 of which is detachably fastened to the outer inner housing 10 in the region of the annular gap 14 and whose opposite inner peripheral surface 18 is provided with an annular receiving groove 19.
- the sealing arrangement 15 comprises a segmented second ring 20, whose inner peripheral surface 21 releasably secured to the inner inner housing 11 in the region of the annular gap 14 relative to the first ring 16 and the opposite outer peripheral surface 22 is provided with an annular receiving groove 23, wherein the receiving grooves 19 and 23 of the rings 16 and 20 radially are arranged opposite each other.
- the sealing arrangement 15 comprises an annular segmented sealing element 24 which is formed as a separate component.
- the sealing element 24 has an essentially I-shaped cross section, wherein it is provided at its two free ends with rounded and widened end portions 25 which have a substantially oval cross section. With these end portions 25, the sealing element 24 engages in the formed on the rings 16 and 20 receiving grooves 19 and 23rd
- FIG. 3 shows a further variant of a sealing arrangement according to the invention 26.
- the seal assembly 26 comprises a segmented first ring made of metal 27.
- the outer peripheral surface 28 of the first ring 27 is detachably secured to the outer inner housing 10 in the region of the annular gap 14, and the opposite inner peripheral surface 29 of the first Ring 27 is provided with an annular receiving groove 30.
- the seal assembly 26 includes a segmented second ring 31, which is also made of metal.
- the inner circumferential surface 32 of the second ring 31 is detachably secured to the inner inner housing 11 opposite to the first ring 27, and the opposite outer peripheral surface 33 of the second ring 31 is provided with an annular receiving groove 34, the receiving grooves 30 and 34 of the rings 27 and 31 radially are arranged opposite each other.
- the rings 27 and 31 are respectively received in annular recesses 35 and 36 of the inner housing 10 and 11, so that formed by the recesses 35 and 36, each radially projecting projections 37 and 38 of the inner housing 10 and 11 axial stops for the rings 27 and 31 form. In this way a better grip of the rings 27 and 31 on the inner housings 10 and 11 is ensured.
- the rings 27 and 31 each comprise a support bar 39, 40 and a sealing strip 41, 42 projecting as annular shoulders axially in the direction of the projections 37 and 38 and are radially spaced from each other, wherein the sealing strips 41, 42 protrude slightly further than the associated support strips 39, 40.
- the fixation of the rings 27 and 31 in the corresponding recesses 35, 36 can be done for example by means of fastening screws which are distributed along the circumference of the rings 27, 31 and in the axial direction between the respective support bar 39, 40 and sealing strip 41, 42 extend through the rings 27, 31 and in corresponding threaded holes (not shown) of the projections 37, 38 are screwed.
- the sealing arrangement 26 according to the second variant also has a sealing element, the structure of which essentially corresponds to the sealing element of FIG. 2 corresponds to the first variant shown, which is why it is also designated by the reference numeral 24 and will not be described again.
- the sealing element 24 engages with its end portions 25 in the receiving grooves 30 and 34 of the rings 27 and 31st
- FIG. 4 shows a seal assembly 43 according to a third variant of the present invention.
- the seal assembly 43 includes a segmented ring 44, the inner peripheral surface 45 of which is detachably secured to the inner inner housing 11 in the region of the annular gap 14, and from the opposite outer peripheral surface 46 an annular sealing member 47 projects radially, which is formed integrally with the ring 44.
- the sealing element 47 has, in the region of its free end, a rounded and widened end section 48, which has a substantially oval cross-section.
- the sealing arrangement 43 comprises a receiving groove 49, in which the end portion 48 of the sealing element 47 engages, wherein the receiving groove 49 is introduced in this variant in the outer inner housing 10.
- FIG. 5 shows a seal assembly 50 according to a fourth variant of the present invention.
- the sealing arrangement 50 comprises a segmented first ring 51, the outer circumferential surface 52 of which is fastened detachably to the outer inner housing 10 in the region of the annular gap 14 and whose opposite inner circumferential surface 53 is provided with an annular receiving groove 54.
- the seal assembly 50 has a segmented second ring 55, the inner peripheral surface 56 is releasably secured to the inner inner housing 11 and protrudes from the outer peripheral surface 57 a radially projecting annular seal member 58 which is integrally formed with the second ring 55.
- the sealing element 58 has a rounded and widened end portion 59 with an oval cross-section, which engages in the receiving groove 54 of the first ring 51.
- All rings and sealing elements of the four variants described above are preferably divided in the middle into two segments and made of steel.
- the releasable attachment of the respective rings to the associated inner housings can be done using press fits, mounting screws or the like. Even if the FIGS. 2 to 5 only on the in FIG. 1 It should be clear that also further annular gaps of the turbine 1 can be sealed with corresponding sealing arrangements according to the invention.
- An essential advantage associated with the seal assemblies 15, 26, 43 and 50 according to the invention is that their individual components can be partially or completely replaced by new components as part of a revision depending on the chosen variant, whereby inspection, inspection and Repair of the seal assemblies completely or completely omitted. In this way costs can be reduced. In addition, the replacement of components compared to their testing and repair of planning reliability in terms of effort and downtime benefits.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Gasket Seals (AREA)
- Sealing Devices (AREA)
Description
Die vorliegende Erfindung betrifft eine Dichtungsanordnung zur Abdichtung eines zwischen einem Hochdruckdampfraum und einem benachbart angeordneten Niederdruckdampfraum vorhandenen Ringspaltes, der zwischen zwei jeweils in zwei Gehäusehälften unterteilten Turbinengehäusen definiert ist, wobei die Dichtungsanordnung ein segmentiert und ringförmig ausgebildetes Dichtungselement aufweist, das sich im bestimmungsgemäßen Zustand zwischen den beiden Turbinengehäusen erstreckt und mit zumindest einem seiner radialen Endbereiche in eine ringförmige Aufnahmenut greift. Ferner betrifft die vorliegende Erfindung die Verwendung einer solchen Dichtungsanordnung zur Abdichtung eines zwischen einem Hochdruckdampfraum und einem benachbart angeordneten Niederdruckdampfraum einer Turbine vorhandenen Ringspaltes, eine Turbine mit zumindest zwei jeweils in zwei Gehäusehälften unterteilten Turbinengehäusen, die zwischen sich einen Hochdruckdampfraum und einen Niederdruckdampfraum bilden, wobei die Dampfräume durch einen zwischen den Turbinengehäusen definierten Ringspalt voneinander getrennt sind, und ein Verfahren zur Reparatur einer verschlissenen Dichtungsanordnung der zuvor genannten Art.The present invention relates to a sealing arrangement for sealing an annular gap present between a high-pressure steam space and an adjacently arranged low-pressure steam space, which is defined between two turbine housings divided into two housing halves, wherein the sealing arrangement has a segmented and annularly formed sealing element which, in the intended condition, is located between the two extends two turbine housings and engages with at least one of its radial end portions in an annular receiving groove. Furthermore, the present invention relates to the use of such a sealing arrangement for sealing an existing between a high-pressure steam space and an adjacent low-pressure steam chamber of a turbine annular gap, a turbine with at least two each divided into two housing halves turbine housings between them form a high pressure steam space and a low pressure steam space, said Steam chambers are separated by an annular gap defined between the turbine housings, and a method for repairing a worn seal assembly of the aforementioned type.
In Dampfturbinen werden normalerweise ringförmig ausgebildete Dichtungselemente zur Abdichtung von zwischen zwei benachbart zueinander angeordneten Dampfräumen vorhandenen Ringspalten eingesetzt, die zwischen zwei jeweils in zwei Gehäusehälften unterteilten Turbinengehäusen definiert sind. Die Dichtungselemente weisen normalerweise einen I-förmigen Querschnitt auf und sind in zwei Segmente unterteilt, um diese montieren zu können. Im bestimmungsgemäß angeordneten Zustand greifen die einander gegenüberliegenden radialen Endbereiche der ringförmigen Dichtungselemente in ringförmige Aufnahmenuten, die einander gegenüberliegend an den Turbinengehäusen bzw. an deren jeweiligen Gehäusehälften ausgebildet sind.
Ausgehend von diesem Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, eine Dichtungsanordnung der eingangs genannten Art zu schaffen, die einen alternativen Aufbau aufweist, preiswert herzustellen und problemlos zu warten ist.Based on this prior art, it is an object of the present invention to provide a seal assembly of the type mentioned, which has an alternative structure, inexpensive to manufacture and is easy to service.
Zur Lösung dieser Aufgabe schafft die vorliegende Erfindung eine Dichtungsanordnung der eingangs genannten Art, die dadurch gekennzeichnet ist, dass die Dichtungsanordnung wenigstens einen segmentierten Ring aufweist, dessen erste Umfangsfläche im bestimmungsgemäßen Zustand an einem der Turbinengehäuse lösbar im Bereich des Ringspalts befestigt und dessen gegenüberliegende zweite Umfangsfläche entweder mit der ringförmigen Aufnahmenut oder in einteiliger Ausbildung mit dem radial vorstehenden ringförmigen Dichtungselement versehen ist. Der wesentliche Vorteil der erfindungsgemäßen Dichtungsanordnung besteht darin, dass bei einer Großrevision, beispielsweise nach 100.000 Betriebsstunden, nicht nur das Dichtungselement sondern auch der wenigstens eine segmentierte Ring vollständig ausgetauscht werden kann. Entsprechend kann auf eine Inspektion, eine Begutachtung des Verschleißes sowie auf aufwendige Instandsetzungsarbeiten verzichtet werden. Darüber hinaus ist auch für das zweite Revisionsintervall eine gezielte, planbare und kostengünstige Austauschlösung möglich, was der Planungssicherheit bezüglich des zu betreibenden Aufwands und auch der Stillstandszeiten zuträglich ist.To achieve this object, the present invention provides a seal assembly of the type mentioned above, which is characterized in that the seal assembly has at least one segmented ring, the first peripheral surface fixed in the intended condition on one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided either with the annular receiving groove or in one-piece construction with the radially projecting annular sealing element. The main advantage of the sealing arrangement according to the invention is that in a major overhaul, for example after 100,000 operating hours, not only the sealing element but also the at least one segmented ring can be completely replaced. Accordingly, an inspection, an inspection of the wear as well as complex repair work can be dispensed with. In addition, a targeted, predictable and cost-effective replacement solution is also possible for the second revision interval, which is beneficial to the planning reliability with respect to the effort to be operated and also the downtime.
Gemäß einer ersten Variante der vorliegenden Erfindung umfasst die Dichtungsanordnung einen ersten Ring, dessen erste Umfangsfläche im bestimmungsgemäßen Zustand an einem der Turbinengehäuse lösbar im Bereich des Ringspalts befestigt und dessen gegenüberliegende zweite Umfangsfläche mit der ringförmigen Aufnahmenut versehen ist, und einen zweiten Ring, dessen erste Umfangsfläche im bestimmungsgemäßen Zustand an dem anderen Turbinengehäuse lösbar im Bereich des Ringspalts gegenüber dem ersten Ring befestigt und dessen gegenüberliegende zweite Umfangsfläche mit einer ringförmigen Aufnahmenut versehen ist, wobei das Dichtungselement als separates Bauteil ausgebildet ist und im bestimmungsgemäßen Zustand in die ringförmigen Aufnahmenuten beider Ringe greift. Mit anderen Worten umfasst die Dichtungsanordnung bei dieser Variante einen dreiteiligen Aufbau mit zwei segmentierten Ringen, die einerseits zur Befestigung an den Turbinengehäusen dienen und andererseits die ringförmigen Aufnahmenuten definieren, und einem als separates Bauteil ausgebildeten Dichtungselement, das im bestimmungsgemäß angeordneten Zustand in die beiden Aufnahmenuten greift.According to a first variant of the present invention, the sealing arrangement comprises a first ring whose first peripheral surface is fastened in the intended state to one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided with the annular receiving groove, and a second ring whose first peripheral surface fixed in the intended condition on the other turbine housing releasably secured in the region of the annular gap relative to the first ring and its opposite second peripheral surface is provided with an annular receiving groove, wherein the sealing element is formed as a separate component and engages in the intended condition in the annular grooves of both rings. In other words, the seal assembly in this variant comprises a three-part structure with two segmented rings, which serve on the one hand for attachment to the turbine housings and on the other define the annular grooves, and a trained as a separate component sealing element which engages in the intended condition in the two grooves ,
Gemäß einer zweiten Variante der vorliegenden Erfindung umfasst die Dichtungsanordnung einen ersten Ring, dessen erste Umfangsfläche im bestimmungsgemäßen Zustand an einem der Turbinengehäuse lösbar im Bereich des Ringspalts befestigt und dessen gegenüberliegende zweite Umfangsfläche mit einer ringförmigen Aufnahmenut versehen ist, und einen zweiten Ring, dessen erste Umfangsfläche im bestimmungsgemäßen Zustand an dem anderen Turbinengehäuse lösbar im Bereich des Ringspalts gegenüber dem ersten Ring befestigt und dessen gegenüberliegende zweite Umfangsfläche mit dem radial vorstehenden ringförmigen Dichtungselement ausgebildet ist, wobei das einteilig mit dem zweiten Ring ausgebildete Dichtungselement im bestimmungsgemäßen Zustand in die ringförmige Aufnahmenut des ersten Ringes greift. Bei dieser zweiten Variante umfasst die Dichtungsanordnung also lediglich zwei jeweils segmentiert ausgebildete Bauteile, und zwar einen ersten Ring mit einteilig ausgebildetem und radial vorstehenden Dichtungselement und einen zweiten Ring, der die ringförmige Aufnahmenut definiert, in die das Dichtungselement im bestimmungsgemäßen Zustand greift.According to a second variant of the present invention, the sealing arrangement comprises a first ring whose first peripheral surface is fastened in the intended state to one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided with an annular receiving groove, and a second ring whose first peripheral surface fixed in the intended state to the other turbine housing releasably secured in the region of the annular gap relative to the first ring and the opposite second peripheral surface is formed with the radially projecting annular sealing element, wherein the integrally formed with the second ring sealing element in the intended condition in the annular receiving groove of the first ring attacks. In this second variant, the seal assembly thus comprises only two components each formed segmented, namely a first ring with one piece trained and radially projecting sealing element and a second ring which defines the annular receiving groove into which the sealing element engages in the intended condition.
Bevorzugt ist der Ring bzw. sind die Ringe aus Stahl hergestellt. Gleiches gilt für das Dichtungselement. Aufgrund der Tatsache, dass die jeweiligen Komponenten im Revisionsfall einfach durch neue Komponenten ausgetauscht werden, ist es möglich, kostengünstige Materialien zu verwenden, wie beispielsweise P265GH oder 16Mo3, wodurch sich ein kostengünstiger Aufbau der erfindungsgemäßen Dichtungsanordnung ergibt.Preferably, the ring or rings are made of steel. The same applies to the sealing element. Due to the fact that the respective components are easily replaced by new components in the case of revision, it is possible to use low-cost materials, such as P265GH or 16Mo3, resulting in a cost-effective design of the seal assembly according to the invention.
Gemäß einer Ausgestaltung der vorliegenden Erfindung weist das Dichtungselement im Bereich seines freien Endes einen abgerundet und verbreitert ausgebildeten Endabschnitt auf, der im bestimmungsgemäßen Zustand in die zugeordnete ringförmige Aufnahmenut greift. Dank der Rundung wird ein guter Sitz des Dichtungselements in der zugeordneten ringförmigen Aufnahmenut gewährleistet. Handelt es sich bei dem Dichtungselement um ein separates Bauteil, so können entsprechend ausgebildete Endabschnitte natürlich an beiden freien Enden des Dichtungselements vorgesehen sein.According to one embodiment of the present invention, the sealing element in the region of its free end on a rounded and widened trained end portion which engages in the intended state in the associated annular receiving groove. Thanks to the rounding a good fit of the sealing element is ensured in the associated annular receiving groove. If the sealing element is a separate component, correspondingly formed end sections can, of course, be provided at both free ends of the sealing element.
Gemäß einer Ausgestaltung der vorliegenden Erfindung ist der Endabschnitt im Querschnitt betrachtet im Wesentlichen oval ausgebildet. Mit dieser Form wurden besonders gute Ergebnisse erzielt.According to one embodiment of the present invention, the end portion is formed in cross-section substantially oval. Particularly good results were achieved with this mold.
Zur Lösung der eingangs genannten Aufgabe betrifft die vorliegende Erfindung ferner die Verwendung einer erfindungsgemäßen Dichtungsanordnung zur Abdichtung eines zwischen einem Hochdruckdampfraum und einem benachbart angeordneten Niederdruckdampfraum einer Turbine vorhandenen Ringspaltes, der zwischen zwei jeweils in zwei Gehäusehälften unterteilten Turbinengehäusen der Turbine definiert ist.To achieve the object mentioned above, the present invention further relates to the use of a sealing arrangement according to the invention for sealing an existing between a high-pressure steam space and an adjacent low pressure steam space of a turbine annular gap which is defined between two each divided into two housing halves turbine housings of the turbine.
Darüber hinaus schafft die vorliegende Erfindung zur Lösung der eingangs genannten Aufgabe eine Turbine mit zumindest zwei jeweils in zwei Gehäusehälften unterteilten Turbinengehäusen, die zwischen sich einen Hochdruckdampfraum und einen Niederdruckdampfraum bilden, wobei die Dampfräume durch einen zwischen den Turbinengehäusen definierten Ringspalt voneinander getrennt sind, der durch eine erfindungsgemäße Dichtungsanordnung abgedichtet ist.In addition, the present invention provides for solving the object mentioned a turbine with at least two divided into two housing halves turbine housings, which form a high-pressure steam space and a low-pressure steam space between them, wherein the steam chambers are separated by an annular gap defined between the turbine housings, by a seal assembly according to the invention is sealed.
Bei der Turbine handelt es sich gemäß einer Ausgestaltung der vorliegenden Erfindung um eine Niederdruckturbine.The turbine according to one embodiment of the present invention is a low-pressure turbine.
Ferner schafft die vorliegende Erfindung ein Verfahren zur Reparatur einer verschlissenen Dichtungsanordnung einer erfindungsgemäßen Turbine, bei dem die verschlissene Dichtungsanordnung vollständig durch eine neue Dichtungsanordnung ausgetauscht wird, insbesondere im Rahmen einer Großrevision der Turbine.Furthermore, the present invention provides a method for repairing a worn seal assembly of a turbine according to the invention in which the worn seal assembly is completely replaced by a new seal assembly, in particular as part of a major overhaul of the turbine.
Weitere Merkmale und Vorteile der vorliegenden Erfindung werden anhand der nachfolgenden Beschreibung von Ausführungsformen der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung deutlich. Darin ist
-
Figur 1 eine Längsschnittansicht einer Niederdruckturbine; -
eine vergrößerte Ansicht des inFigur 2Figur 1 mit dem Bezugszeichen II gekennzeichneten Ausschnitts, die eine erste Variante einer Dichtungsanordnung gemäß der vorliegenden Erfindung zeigt; -
eine vergrößerte Ansicht des inFigur 3Figur 1 mit dem Bezugszeichen II versehenen Ausschnitts, die eine zweite Variante einer Dichtungsanordnung gemäß der vorliegenden Erfindung zeigt; -
eine vergrößerte Ansicht des inFigur 4Figur 1 mit dem Bezugszeichen II gekennzeichneten Ausschnitts, die eine dritte Variante einer Dichtungsanordnung gemäß der vorliegenden Erfindung zeigt; und -
eine vergrößerte Ansicht des inFigur 5Figur 1 mit dem Bezugszeichen II gekennzeichneten Ausschnitts, die eine vierte Variante einer Dichtungsanordnung gemäß der vorliegenden Erfindung zeigt.
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FIG. 1 a longitudinal sectional view of a low-pressure turbine; -
FIG. 2 an enlarged view of the inFIG. 1 with the reference numeral II marked section showing a first variant of a seal assembly according to the present invention; -
FIG. 3 an enlarged view of the inFIG. 1 with the reference numeral II provided section showing a second variant of a seal assembly according to the present invention; -
FIG. 4 an enlarged view of the inFIG. 1 marked with the reference numeral II section, which is a third Variant of a seal assembly according to the present invention shows; and -
FIG. 5 an enlarged view of the inFIG. 1 marked with the reference numeral II section showing a fourth variant of a seal assembly according to the present invention.
Gleiche Bezugsziffern beziehen sich nachfolgend auf gleiche oder gleichartig ausgebildete Bauteile.The same reference numbers refer to the same or similar components below.
Sämtliche Ringe und Dichtungselemente der zuvor beschriebenen vier Varianten sind bevorzugt mittig in jeweils zwei Segmente unterteilt und aus Stahl hergestellt. Die lösbare Befestigung der jeweiligen Ringe an den zugehörigen Innengehäusen kann unter Verwendung von Presssitzen, Befestigungsschrauben oder dergleichen erfolgen. Auch wenn sich die
Ein wesentlicher Vorteil, der mit den erfindungsgemäßen Dichtungsanordnungen 15, 26, 43 und 50 einhergeht, besteht darin, dass ihre einzelnen Komponenten im Rahmen einer Revision in Abhängigkeit von der gewählten Variante teilweise oder vollständig durch neue Bauteile ausgetauscht werden können, wodurch Inspektion, Begutachtung und Reparatur der Dichtungsanordnungen ganz oder vollständig entfallen. Auf diese Weise können Kosten reduziert werden. Darüber hinaus ist der Austausch von Komponenten gegenüber deren Prüfung und Reparatur der Planungssicherheit bezüglich Aufwand und Stillstandszeiten zuträglich.An essential advantage associated with the
Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung, wie er in den Ansprüchen festgelegt ist, zu verlassen.Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention as defined in the claims leave.
Claims (11)
- Seal arrangement (15; 26; 43; 50) for sealing an annular gap (14) between a high-pressure steam space (12) and an adjacent low-pressure steam space (13), which gap is defined between two turbine casings (10, 11) in each case split into two casing halves, wherein the seal arrangement (15; 26; 43; 50) has a seal element (24; 47; 58) which is formed in a segmented and annular manner and, in the intended state, extends between the two turbine casings (10, 11) and engages in an annular receiving groove (9, 23; 30, 34; 49; 54) by means of at least one of its radial end regions, characterized in that the seal arrangement (15; 26; 43; 50) has at least one segmented ring (16, 20; 27, 31; 44; 51; 55) whose first circumferential surface (17, 21; 28, 32; 42; 49, 53) is, in the intended state, releasably attached to one of the turbine casings (10, 11) in the region of the annular gap (14), and whose opposite second circumferential surface (18, 22; 29, 33; 43; 53, 57) is provided either with the annular receiving groove (9, 23; 30, 34; 54) or, in a one-piece form, with the radially projecting annular seal element (44; 58).
- Seal arrangement (15; 26) according to Claim 1,
characterized in that
it has a first ring (16; 27) whose first circumferential surface (17; 28) is, in the intended state, releasably attached to one of the turbine casings (10) in the region of the annular gap (14), and whose opposite second circumferential surface (18; 29) is provided with the annular receiving groove (19; 30), and a second ring (20; 31) whose first circumferential surface (21; 32) is, in the intended state, releasably attached, opposite the first ring (16; 27), to the other turbine casing (11) in the region of the annular gap (14), and whose opposite second circumferential surface (22; 33) is provided with an annular receiving groove (19; 30), wherein the seal element (24) is formed as a separate component and, in the intended state, engages in the annular receiving grooves (19; 30) of both rings (16, 20; 27, 31). - Seal arrangement (50) according to Claim 1,
characterized in that
it has a first ring (51) whose first circumferential surface (52) is, in the intended state, releasably attached to one of the turbine casings (10) in the region of the annular gap (14), and whose opposite second circumferential surface (53) is provided with an annular receiving groove (54), and a second ring (55) whose first circumferential surface (56) is, in the intended state, releasably attached, opposite the first ring (51), to the other turbine casing (11) in the region of the annular gap (14), and whose opposite second circumferential surface (57) is formed with the radially projecting annular seal element (58), wherein the seal element (58) formed in one piece with the second ring (55) engages, in the intended state, in the annular receiving groove (54) of the first ring (51). - Seal arrangement (15; 26; 43; 50) according to one of the preceding claims,
characterized in that
the at least one ring (16, 20; 27, 31; 44; 51, 55) is made of steel. - Seal arrangement (15; 26; 43; 50) according to one of the preceding claims,
characterized in that
the seal element (24; 47; 58) is made of steel. - Seal arrangement (15; 26; 43; 50) according to one of the preceding claims,
characterized in that
the seal element (24; 47; 58) has, in the region of its free end, a rounded and widened end section (25; 48; 59). - Seal arrangement (15; 26; 43; 50) according to Claim 6,
characterized in that
the end section (25; 48; 59) is of substantially oval cross section. - Use of a seal arrangement (15; 26; 43; 50), according to one of the preceding claims, for sealing an annular gap (14) between a high-pressure steam space (12) and an adjacent low-pressure steam space (13) of a turbine (1), which gap is defined between two turbine casings (10, 11) of the turbine (1) in each case split into two casing halves.
- Turbine (1) having at least two turbine casings (10, 11), in each case split into two casing halves, which between them form a high-pressure steam space (12) and a low-pressure steam space (13), wherein the steam spaces (12, 13) are separated from one another by an annular gap (14) defined between the turbine casings (10, 11), characterized in that the annular gap (14) is sealed by a seal arrangement (15; 26; 43; 50) according to one of Claims 1 to 7.
- Turbine (1) according to Claim 9,
characterized in that
it is a low-pressure turbine. - Method for repairing a worn seal arrangement (15; 26; 43; 50) of a turbine (1) according to Claim 9 or 10, in which the worn seal arrangement (15; 26; 43; 50) is replaced in its entirety with a new seal arrangement (15; 26; 43; 50).
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13189280.4A EP2863019B1 (en) | 2013-10-18 | 2013-10-18 | Seal arrangement |
IN2686DE2014 IN2014DE02686A (en) | 2013-10-18 | 2014-09-18 | |
US14/514,871 US10125626B2 (en) | 2013-10-18 | 2014-10-15 | Seal arrangement |
JP2014212408A JP2015108372A (en) | 2013-10-18 | 2014-10-17 | Seal structure |
CN201410558534.6A CN104564171B (en) | 2013-10-18 | 2014-10-20 | sealing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13189280.4A EP2863019B1 (en) | 2013-10-18 | 2013-10-18 | Seal arrangement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2863019A1 EP2863019A1 (en) | 2015-04-22 |
EP2863019B1 true EP2863019B1 (en) | 2017-03-29 |
Family
ID=49385152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13189280.4A Active EP2863019B1 (en) | 2013-10-18 | 2013-10-18 | Seal arrangement |
Country Status (5)
Country | Link |
---|---|
US (1) | US10125626B2 (en) |
EP (1) | EP2863019B1 (en) |
JP (1) | JP2015108372A (en) |
CN (1) | CN104564171B (en) |
IN (1) | IN2014DE02686A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113550830B (en) * | 2021-08-26 | 2022-11-25 | 中国联合重型燃气轮机技术有限公司 | Sealing device and gas turbine with same |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1038162A (en) * | 1951-06-06 | 1953-09-25 | Licentia Gmbh | Axially inlet steam or gas turbine with an inserted support for guide vanes or nozzle cover |
US5104286A (en) * | 1991-02-08 | 1992-04-14 | Westinghouse Electric Corp. | Recirculation seal for a gas turbine exhaust diffuser |
US6648332B1 (en) * | 2002-07-29 | 2003-11-18 | General Electric Company | Steam turbine packing casing horizontal joint seals and methods of forming the seals |
US7001145B2 (en) | 2003-11-20 | 2006-02-21 | General Electric Company | Seal assembly for turbine, bucket/turbine including same, method for sealing interface between rotating and stationary components of a turbine |
EP2239419A1 (en) | 2009-03-31 | 2010-10-13 | Siemens Aktiengesellschaft | Axial turbo engine rotor with sealing disc |
US20110164965A1 (en) * | 2010-01-06 | 2011-07-07 | General Electric Company | Steam turbine stationary component seal |
EP2410128A1 (en) * | 2010-07-21 | 2012-01-25 | Siemens Aktiengesellschaft | Internal cooling for a flow machine |
US9017015B2 (en) * | 2011-10-27 | 2015-04-28 | General Electric Company | Turbomachine including an inner-to-outer turbine casing seal assembly and method |
US20130181408A1 (en) | 2012-01-13 | 2013-07-18 | General Electric Company | Brush seal arrangement combined with honeycomb seal |
JP6125329B2 (en) * | 2013-05-27 | 2017-05-10 | 株式会社東芝 | Stationary seal structure |
-
2013
- 2013-10-18 EP EP13189280.4A patent/EP2863019B1/en active Active
-
2014
- 2014-09-18 IN IN2686DE2014 patent/IN2014DE02686A/en unknown
- 2014-10-15 US US14/514,871 patent/US10125626B2/en not_active Expired - Fee Related
- 2014-10-17 JP JP2014212408A patent/JP2015108372A/en active Pending
- 2014-10-20 CN CN201410558534.6A patent/CN104564171B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
JP2015108372A (en) | 2015-06-11 |
US20150110620A1 (en) | 2015-04-23 |
IN2014DE02686A (en) | 2015-06-26 |
EP2863019A1 (en) | 2015-04-22 |
CN104564171A (en) | 2015-04-29 |
US10125626B2 (en) | 2018-11-13 |
CN104564171B (en) | 2018-11-13 |
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