EP0418887A1 - Annular diffusor for steam turbines - Google Patents

Annular diffusor for steam turbines Download PDF

Info

Publication number
EP0418887A1
EP0418887A1 EP90118119A EP90118119A EP0418887A1 EP 0418887 A1 EP0418887 A1 EP 0418887A1 EP 90118119 A EP90118119 A EP 90118119A EP 90118119 A EP90118119 A EP 90118119A EP 0418887 A1 EP0418887 A1 EP 0418887A1
Authority
EP
European Patent Office
Prior art keywords
annular
diffuser
mounting ring
gap
chamber
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
EP90118119A
Other languages
German (de)
French (fr)
Other versions
EP0418887B1 (en
Inventor
Miroslav Stastny
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.)
SKODA KONCERN PLZEN
Skoda kp
Original Assignee
SKODA KONCERN PLZEN
Skoda kp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SKODA KONCERN PLZEN, Skoda kp filed Critical SKODA KONCERN PLZEN
Publication of EP0418887A1 publication Critical patent/EP0418887A1/en
Application granted granted Critical
Publication of EP0418887B1 publication Critical patent/EP0418887B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/30—Exhaust heads, chambers, or the like
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles

Definitions

  • the invention relates to a diffuser for the low pressure part of a steam turbine.
  • Circular diffusers of this type are arranged downstream of the last working stage of the steam turbine in order to ensure the uniform removal of the relaxed steam.
  • the function of the diffusers can be improved by providing a gap for aspirating or blowing in a liquid medium, but this is associated with various problems.
  • suction gaps there is a complicated removal of the extracted steam into zones of low pressure and the desired mode of operation is only possible within a relatively narrow range of the amount of steam to be extracted.
  • the energy consumption required to extract the steam is disadvantageous.
  • the provision of blowing gaps leads to a complicated supply of steam and losses due to the energy required for blowing.
  • the invention has for its object to provide an improved circular diffuser for steam turbines that allows effective evacuation of relaxed exhaust steam and possibly condensate in a wide working range of the turbine with virtually no energy consumption with a simple structure.
  • the diffuser formed from a ring of the last stator, its guide vanes, an outer and an inner jacket contains an annular collecting chamber in the ring of the last stator above the guide vanes with gaps, which chamber is connected to a peripheral collecting chamber via channels.
  • the peripheral collecting chamber is formed between the front and the rear part of the outer shell of the annular diffuser and is on the one hand over a vertical gap with an intermediate wheel space between the guide and the rotor blades, on the other hand by means of between the inner surface of the rear part of the outer shell of the annular diffuser and the upper edge of the front part of the outer jacket of the annular diffuser provided with the free space of the expanded part of the diffuser in connection.
  • the diffuser according to the invention ensures that the condensate is sufficiently removed through the gaps in the hollow guide vanes and through the vertical gap from the space between the guide vanes and the rotor blades of the last stage.
  • the condensate is entrained by a steam component and, in addition to a noticeable reduction in blade erosion, this steam component is advantageously blown tangentially into the expanded part of the diffuser through the blowing gap.
  • Such tangential blowing reduces the area of flow separation on the outer wall of the diffuser and at the same time increases the output of the steam turbine.
  • a preferred embodiment of the diffuser according to the invention is explained in more detail below with reference to the schematic drawing, which shows a longitudinal section of the last stage of a steam turbine and the downstream diffuser.
  • the illustrated annular diffuser with blowing is provided by a ring 2 of the last stator wheel mounted in a body 01 of the LP part of the steam turbine, the guide vanes 1 fixed with their outer ends in the ring 2, an outer jacket 11 fastened to the end face of the ring 2 and from one formed the front part of a guide element 13 forming the outer jacket.
  • a vertical gap 8 is provided between a fastening flange 31 on the guide element 13 of the outer casing and the end face of the ring 2.
  • the outer jacket 11 is attached directly to the end face of the body 01 by means of an annular flange 30.
  • An annular collecting chamber 7 is provided in the end part 11 of the outer jacket and the outer surface of the guide element 13.
  • This annular chamber 5 is arranged in the ring 2 above the guide vanes 1, in each of which a long radial gap 3 is formed on the belly and several shorter gaps 4 on the back.
  • a larger condensate droplet-bearing vapor fraction impinges on the guide vanes 1 and drives the droplets into the rear column 4 of the guide vanes 1 and into the front radial gap 3.
  • Another steam fraction flows through the vane grille into the intermediate wheel space 14 and drives the rotor blade 9, whereupon it flows through the diffuser delimited by the inner jacket 15 and the inner surfaces of the guide element 13 of the outer jacket.
  • Condensate droplets flow on the outer wall 12 of the action channel formed by the intermediate space 14 and are driven together with a proportion of steam through the gap 8 and into the collecting chamber 7.
  • this steam water mixture mixes with the steam water mixture which flows via the gaps or grooves 3 and 4 on the two side surfaces of the guide vanes 1 into the annular chamber 5 and from there via the channels 6 into the collecting chamber 7.
  • the pressure of the steam continuously supplied through the gap 8 and the channels 6 displaces the steam from the collecting chamber 7 through the blow gap 10 into the outer peripheral region of the diffuser.

Abstract

The subject matter of the invention is a diffuser for steam turbines, which is bounded by the stator disc (1) of the final stage, an inner jacket (15) and an outer jacket (11). In order to improve the discharge of the steam-condensate mixture which forms, an annular chamber (5) is constructed in the retaining rim (2) for the stator blades of the final stator disc (1), which annular chamber (5) is connected, in flow terms, via channels (6) to a downstream collecting chamber (7). <IMAGE>

Description

Die Erfindung betrifft einen Diffusor für den Niederdruck­teil einer Dampfturbine.The invention relates to a diffuser for the low pressure part of a steam turbine.

Derartige kreisringförmige Diffusoren werden der letzten Arbeitsstufe der Dampfturbine nachgeordnet, um die gleich­förmige Abführung des entspannten Dampfes zu gewährleisten. Die Funktion der Diffusoren kann durch Vorsehen eines Spaltes zum Absaugen bzw. Einblasen eines Flüssigkeits­mediums verbessert werden, was jedoch mit verschiedenen Problemen verbunden ist. Bei Saugspalten ergibt sich eine komplizierte Abführung des abgesaugten Dampfes in Zonen von geringem Druck und die erwünschte Arbeitsweise ist lediglich innerhalb eines relativ engen Bereichs der ab­zusaugenden Dampfmenge möglich. Weiterhin ist der zum Absaugen des Dampfes benötigte Energieverbrauch nach­teilig. Das Vorsehen von Einblasspalten führt zu einer komplizierten Dampfzufuhr und Verlusten durch die zum Einblasen notwendige Energie.Circular diffusers of this type are arranged downstream of the last working stage of the steam turbine in order to ensure the uniform removal of the relaxed steam. The function of the diffusers can be improved by providing a gap for aspirating or blowing in a liquid medium, but this is associated with various problems. In the case of suction gaps there is a complicated removal of the extracted steam into zones of low pressure and the desired mode of operation is only possible within a relatively narrow range of the amount of steam to be extracted. Furthermore, the energy consumption required to extract the steam is disadvantageous. The provision of blowing gaps leads to a complicated supply of steam and losses due to the energy required for blowing.

Der Erfindung liegt die Aufgabe zugrunde, einen verbesserten kreisringförmigen Diffusor für Dampfturbinen zu schaffen, der bei einfachem Aufbau eine wirksame Abführung von ent­spanntem Abdampf und ggf. Kondensat in einem weiten Arbeits­bereich der Turbine praktisch ohne Energieverbrauch ermög­licht.The invention has for its object to provide an improved circular diffuser for steam turbines that allows effective evacuation of relaxed exhaust steam and possibly condensate in a wide working range of the turbine with virtually no energy consumption with a simple structure.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the features of patent claim 1.

Der aus einem Kranz des letzten Leitrades, seinen Leit­schaufeln, einem Außen- und einem Innenmantel gebildete Diffusor enthält erfindungsgemäß im Kranz des letzten Leitrades über den Leitschaufeln mit Spalten eine kreis­ringförmige Sammelkammer, die über Kanäle mit einer Umfangs­sammelkammer in Verbindung steht. Die Umfangssammelkammer ist zwischen dem Vorder- und dem Hinterteil des Außenman­tels des kreisringförmigen Diffusors ausgebildet und steht einerseits über einen lotrechten Spalt mit einem Zwischen­radraum zwischen den Leit- und den Laufschaufeln, anderer­seits mittels eines zwischen der Innenfläche des Hinter­teils des Außenmantels des kreisringförmigen Diffusors und der Oberkante des Vorderteils des Außenmantels des kreisringförmigen Diffusors vorgesehenen Einblasspaltes mit dem freien Raum des erweiterten Teils des Diffusors in Verbindung.According to the invention, the diffuser formed from a ring of the last stator, its guide vanes, an outer and an inner jacket contains an annular collecting chamber in the ring of the last stator above the guide vanes with gaps, which chamber is connected to a peripheral collecting chamber via channels. The peripheral collecting chamber is formed between the front and the rear part of the outer shell of the annular diffuser and is on the one hand over a vertical gap with an intermediate wheel space between the guide and the rotor blades, on the other hand by means of between the inner surface of the rear part of the outer shell of the annular diffuser and the upper edge of the front part of the outer jacket of the annular diffuser provided with the free space of the expanded part of the diffuser in connection.

Der erfindungsgemäße Diffusor gewährleistet eine aus­reichende Abfuhr des Kondensats durch die Spalte in den hohlen Leitschaufeln sowie durch den lotrechten Spalt aus dem Raum zwischen den Leit- und den Laufschaufeln der letzten Stufe. Das Kondensat wird durch einen Dampf­anteil mitgerissen und außer einer spürbaren Herabsetzung der Schaufelerosion wird dieser Dampfanteil vorteilhaft tangential in den erweiterten Teil des Diffusors durch den Einblasspalt eingeblasen. Durch ein solches tangentiales Einblasen wird der Bereich der Strömungsablösung an der Außenwand des Diffusors vermindert und gleichzeitig die Leistung der Dampfturbine erhöht.The diffuser according to the invention ensures that the condensate is sufficiently removed through the gaps in the hollow guide vanes and through the vertical gap from the space between the guide vanes and the rotor blades of the last stage. The condensate is entrained by a steam component and, in addition to a noticeable reduction in blade erosion, this steam component is advantageously blown tangentially into the expanded part of the diffuser through the blowing gap. Such tangential blowing reduces the area of flow separation on the outer wall of the diffuser and at the same time increases the output of the steam turbine.

Eine bevorzugte Ausführung des erfindungsgemäßen Diffusors wird im folgenden anhand der schematischen Zeichnung näher erläutert, die einen Längsschnitt der letzten Stufe einer Dampfturbine und des nachgeordneten Diffusors zeigt.A preferred embodiment of the diffuser according to the invention is explained in more detail below with reference to the schematic drawing, which shows a longitudinal section of the last stage of a steam turbine and the downstream diffuser.

Der dargestellte kreisringförmige Diffusor mit Einblasen wird von einem Kranz 2 des letzten in einem Körper 01 des ND-Teils der Dampfturbine gelagerten Leitrads, den mit ihren Außenenden im Kranz 2 festgelegten Leitschaufeln 1, einem an der Stirnseite des Kranzes 2 befestigten Außen­mantel 11 und aus einem den Vorderteil eines den Außen­mantel bildenden Leitelement 13 gebildet. Zwischen einem Befestigungsflansch 31 am Leitelement 13 des Außenmantels und der Stirnseite des Kranzes 2 ist ein lotrechter Spalt 8 vorgesehen. Der Außenmantel 11 ist mittels eines Ring­flansches 30 direkt an der Stirnseite des Körpers 01 be­festigt. Zwischen der Innenfläche des etwa zylindrischen Endteils 11 des Außenmantels und der Außenfläche des Leit­elements 13 ist eine kreisringförmige Sammelkammer 7 vor­gesehen. In diese Sammelkammer 7 münden der Spalt 8 aus dem Zwischenradraum 14, ein Blasspalt 10 zwischen dem Außenmantel 11 und der Endkante des bogenförmigen Leit­elements 13 sowie Kanäle 6 im Kranz 2, welche die Sammel­kammer 7 mit einer Ringkammer 5 verbinden. Diese Ring­kammer 5 ist im Kranz 2 über den Leitschaufeln 1 ange­ordnet, in denen je ein langer Radialspalt 3 am Bauch und mehrere kürzere Spalte 4 am Rücken ausgebildet sind.The illustrated annular diffuser with blowing is provided by a ring 2 of the last stator wheel mounted in a body 01 of the LP part of the steam turbine, the guide vanes 1 fixed with their outer ends in the ring 2, an outer jacket 11 fastened to the end face of the ring 2 and from one formed the front part of a guide element 13 forming the outer jacket. A vertical gap 8 is provided between a fastening flange 31 on the guide element 13 of the outer casing and the end face of the ring 2. The outer jacket 11 is attached directly to the end face of the body 01 by means of an annular flange 30. Between the inner surface of the approximately cylindrical An annular collecting chamber 7 is provided in the end part 11 of the outer jacket and the outer surface of the guide element 13. The gap 8 from the intermediate wheel space 14, a blow gap 10 between the outer jacket 11 and the end edge of the arcuate guide element 13 and channels 6 in the ring 2, which connect the collecting chamber 7 with an annular chamber 5, open into this collecting chamber 7. This annular chamber 5 is arranged in the ring 2 above the guide vanes 1, in each of which a long radial gap 3 is formed on the belly and several shorter gaps 4 on the back.

Während des Betriebs der Dampfturbine prallt ein größerer Kondensattröpfchen mitnehmender Dampfanteil auf die Leit­schaufeln 1 auf und treibt die Tröpfchen in die rückseitigen Spalte 4 der Leitschaufeln 1 sowie in den vorderen Radial­spalt 3. Ein weiterer Dampfanteil strömt durch das Schaufel­gitter in den Zwischenradraum 14 und treibt die Laufschau­fel 9 an, worauf er den vom Innenmantel 15 und den Innen­flächen des Leitelements 13 des Außenmantels begrenzten Diffusor durchströmt. Kondensattröpfchen fließen an der Außenwand 12 des vom Zwischenraum 14 gebildeten Aktions­kanals und werden zusammen mit einem Dampfanteil über den Spalt 8 und in die Sammelkammer 7 getrieben. Hier mischt sich dieses Dampfwassergemisch mit dem Dampfwasser­gemisch, das über die Spalte bzw. Nuten 3 und 4 an den beiden Seitenflächen der Leitschaufeln 1 in die Ring­kammer 5 und daraus über die Kanäle 6 in die Sammelkammer 7 strömt. Der Druck des durch den Spalt 8 und die Kanäle 6 kontinuierlich zugeführten Dampfes verdrängt den Dampf aus der Sammelkammer 7 durch den Blasspalt 10 in den äuße­ren Umfangsbereich des Diffusors. Durch Beschleunigen der Strömung in diesem Bereich werden die Strömungsab­ lösungen wesentlich vermindert, was den Wirkungsgrad des Diffusors und damit die Leistung der Dampfturbine erhöht.During the operation of the steam turbine, a larger condensate droplet-bearing vapor fraction impinges on the guide vanes 1 and drives the droplets into the rear column 4 of the guide vanes 1 and into the front radial gap 3. Another steam fraction flows through the vane grille into the intermediate wheel space 14 and drives the rotor blade 9, whereupon it flows through the diffuser delimited by the inner jacket 15 and the inner surfaces of the guide element 13 of the outer jacket. Condensate droplets flow on the outer wall 12 of the action channel formed by the intermediate space 14 and are driven together with a proportion of steam through the gap 8 and into the collecting chamber 7. Here this steam water mixture mixes with the steam water mixture which flows via the gaps or grooves 3 and 4 on the two side surfaces of the guide vanes 1 into the annular chamber 5 and from there via the channels 6 into the collecting chamber 7. The pressure of the steam continuously supplied through the gap 8 and the channels 6 displaces the steam from the collecting chamber 7 through the blow gap 10 into the outer peripheral region of the diffuser. By accelerating the flow in this area, the flow will decrease Solutions significantly reduced, which increases the efficiency of the diffuser and thus the performance of the steam turbine.

Claims (6)

1. Ringförmiger Diffusor für Dampfturbinen, der von den Leitschaufeln (1) und deren äußerem Halterungskranz (2) des letzten Leitrads, einem daran anschließendem Außenmantel (11) und einem Innenmantel (15) gebildet wird,
dadurch gekennzeichnet,
daß im Halterungskranz (2) eine nach radial innen offene Ringkammer (5) vorgesehen ist, die über Kanäle (6) mit einer nachgeordneten ringförmigen Sammelkammer (7) in Verbindung steht.1. annular diffuser for steam turbines, which is formed by the guide vanes (1) and their outer mounting ring (2) of the last guide wheel, an adjoining outer casing (11) and an inner casing (15),
characterized by
that an annular chamber (5) which is open radially inward is provided in the mounting ring (2) and is connected via channels (6) to a downstream annular collecting chamber (7). 2. Diffusor nach Anspruch 1,
dadurch gekennzeichnet,
daß in den Leitschaufeln (1) vorzugsweise radial ver­laufende spaltförmige Ausnehmungen (3, 4) zur Kondensatab­führung in die Ringkammer (5) vorgesehen sind.2. Diffuser according to claim 1,
characterized,
that preferably radially extending gap-shaped recesses (3, 4) are provided in the guide vanes (1) for condensate discharge into the annular chamber (5). 3. Diffusor nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die radial außen von einem Wandabschnitt des Außen­mantels (11), radial innen von einem gewölbten Leitele­ment (13) und stirnseitig vom Halterungskranz (2) be­grenzte Ringkammer (7) über einen schmalen Ringspalt (10) im Bereich des Außenmantels (11) in den Diffusor-­Innenraum ausmündet.3. Diffuser according to claim 1 or 2,
characterized,
that the radially outside of a wall section of the outer casing (11), radially inside by a curved guide element (13) and the end face of the mounting ring (2) bounded annular chamber (7) via a narrow annular gap (10) in the area of the outer casing (11) in the Diffuser interior opens out. 4. Diffusor nach einem der Ansprüche 1-3,
dadurch gekennzeichnet,
daß die Sammelkammer (7) einströmseitig über einen Radialspalt (8) mit einem Raum (14) zwischen dem letzten Leitrad (1) und einem diesem nachgeordneten Turbinen­laufrad (9) in Verbindung steht.4. Diffuser according to one of claims 1-3,
characterized,
that the collecting chamber (7) is connected on the inflow side via a radial gap (8) to a space (14) between the last stator (1) and a turbine impeller (9) arranged downstream thereof. 5. Diffusor nach Anspruch 4,
dadurch gekennzeichnet,
daß die radiale Innenfläche (12) des den Zwischenraum (14) nach radial außen begrenzenden Halterungskranzes (2) in Strömungsrichtung in etwa konisch verläuft und in den Radialspalt (8) am Befestigungsflansch (31) des Leitelements (13) ausmündet.5. Diffuser according to claim 4,
characterized,
that the radial inner surface (12) of the intermediate space (14) radially outwardly defining the mounting ring (2) is approximately conical in the direction of flow and opens into the radial gap (8) on the mounting flange (31) of the guide element (13). 6. Diffusor nach einem der Ansprüche 1-5,
dadurch gekennzeichnet,
daß die die Ringkammer (5) mit der Sammelkammer (7) verbindenden Kanäle (6) im Halterungskranz (2) ange­ordnet sind und aus radialen und axialen Abschnitten bestehen.6. Diffuser according to one of claims 1-5,
characterized,
that the annular chamber (5) with the collecting chamber (7) connecting channels (6) are arranged in the mounting ring (2) and consist of radial and axial sections.
EP19900118119 1989-09-20 1990-09-20 Annular diffusor for steam turbines Expired - Lifetime EP0418887B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS5359/89 1989-09-20
CS895359A CS275328B2 (en) 1989-09-20 1989-09-20 Annular diffuser for steam turbine

Publications (2)

Publication Number Publication Date
EP0418887A1 true EP0418887A1 (en) 1991-03-27
EP0418887B1 EP0418887B1 (en) 1994-03-16

Family

ID=5398355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900118119 Expired - Lifetime EP0418887B1 (en) 1989-09-20 1990-09-20 Annular diffusor for steam turbines

Country Status (3)

Country Link
EP (1) EP0418887B1 (en)
CS (1) CS275328B2 (en)
DE (1) DE59005000D1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5149248A (en) * 1991-01-10 1992-09-22 Westinghouse Electric Corp. Apparatus and method for adapting an enlarged flow guide to an existing steam turbine
US5257906A (en) * 1992-06-30 1993-11-02 Westinghouse Electric Corp. Exhaust system for a turbomachine
US5494405A (en) * 1995-03-20 1996-02-27 Westinghouse Electric Corporation Method of modifying a steam turbine
US5518366A (en) * 1994-06-13 1996-05-21 Westinghouse Electric Corporation Exhaust system for a turbomachine
DE19755982A1 (en) * 1997-12-17 1999-07-08 Abb Patent Gmbh Steam turbine with wet steam regime
EP1561909A1 (en) * 2004-02-09 2005-08-10 Siemens Aktiengesellschaft Diffuser, turbomachine and method of recovery of pressure in a turbomachine.
DE102010064450B3 (en) * 2010-01-20 2015-01-08 Gardner Denver Deutschland Gmbh Relaxation turbine for the relaxation of gas
JPWO2014010287A1 (en) * 2012-07-11 2016-06-20 三菱日立パワーシステムズ株式会社 Axial exhaust turbine
EP3653850A1 (en) 2018-11-16 2020-05-20 Doosan Skoda Power S.r.o. Exhaust diffuser for a steam turbine and corresponding turbine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3058720A (en) * 1960-11-10 1962-10-16 Westinghouse Electric Corp Moisture removing apparatus for steam turbine or the like
US3318077A (en) * 1963-10-16 1967-05-09 Zd Y V I Plzen Narodni Podnik Device for removing water from the stages of steam turbines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3058720A (en) * 1960-11-10 1962-10-16 Westinghouse Electric Corp Moisture removing apparatus for steam turbine or the like
US3318077A (en) * 1963-10-16 1967-05-09 Zd Y V I Plzen Narodni Podnik Device for removing water from the stages of steam turbines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5149248A (en) * 1991-01-10 1992-09-22 Westinghouse Electric Corp. Apparatus and method for adapting an enlarged flow guide to an existing steam turbine
US5257906A (en) * 1992-06-30 1993-11-02 Westinghouse Electric Corp. Exhaust system for a turbomachine
US5518366A (en) * 1994-06-13 1996-05-21 Westinghouse Electric Corporation Exhaust system for a turbomachine
US5494405A (en) * 1995-03-20 1996-02-27 Westinghouse Electric Corporation Method of modifying a steam turbine
DE19755982A1 (en) * 1997-12-17 1999-07-08 Abb Patent Gmbh Steam turbine with wet steam regime
DE19755982C2 (en) * 1997-12-17 2000-05-31 Abb Patent Gmbh Guide vanes for use in the wet steam area of a steam turbine
EP1561909A1 (en) * 2004-02-09 2005-08-10 Siemens Aktiengesellschaft Diffuser, turbomachine and method of recovery of pressure in a turbomachine.
DE102010064450B3 (en) * 2010-01-20 2015-01-08 Gardner Denver Deutschland Gmbh Relaxation turbine for the relaxation of gas
JPWO2014010287A1 (en) * 2012-07-11 2016-06-20 三菱日立パワーシステムズ株式会社 Axial exhaust turbine
US10072528B2 (en) 2012-07-11 2018-09-11 Mitsubishi Hitachi Power Systems, Ltd. Axial-flow exhaust turbine
EP3653850A1 (en) 2018-11-16 2020-05-20 Doosan Skoda Power S.r.o. Exhaust diffuser for a steam turbine and corresponding turbine

Also Published As

Publication number Publication date
CS535989A2 (en) 1991-04-11
CS275328B2 (en) 1992-02-19
DE59005000D1 (en) 1994-04-21
EP0418887B1 (en) 1994-03-16

Similar Documents

Publication Publication Date Title
DE2837543C2 (en) Extractor device
DE19817705C2 (en) Extraction of cooling air from the diffuser part of a compressor in a gas turbine
DE846802C (en) Turbine for gas or vapor pressure medium
DE3713923C2 (en) Cooling air transmission device
DE2632155C3 (en) Gas turbine jet engine
EP0235642A2 (en) Arrangement for the aeration of compressor rotor parts of gas turbine power units
DE2554010A1 (en) DEVICE AND METHOD FOR SUPPLYING COOLING AIR TO TURBINE VANES
DE2428210A1 (en) HYDRODYNAMIC MULTISTAGE PUMP
EP0418887A1 (en) Annular diffusor for steam turbines
DE3308140A1 (en) MULTI-STAGE DECKBAND TURBINE
DE2128217C3 (en) Multi-stage compressor
DE19814627C2 (en) Extraction of cooling air from the diffuser part of a compressor in a gas turbine
DE3315477A1 (en) DUST SEPARATOR
DE4023724A1 (en) Radial-flow fan with radial impeller - has inlet nozzle with arcuated contour shifted radially inwards for specified tangent inclination
DE918726C (en) Gas turbine
DE3926152C2 (en)
DE4115805A1 (en) RADIAL BLOWER WITH A BLOWING WHEEL IN A SPIRAL CASE
DE19612923A1 (en) Air blower
DE102011005105B4 (en) Outlet collecting housing for a centrifugal compressor
DE4129357C2 (en) Tangential blower for turbo engines
CH252609A (en) Multi-stage compressor.
DE2446862C2 (en) Pump housing for a heating circulation pump without a stuffing box
DE1927637B1 (en) Gas turbine plant
EP0452518A1 (en) Cooling system comprising an axial fan driven by an electric motor, particularly for use in a motor vehicle
DE2828590C2 (en) Two-stage axial fan, especially for electric traction vehicles

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB LI SE

17P Request for examination filed

Effective date: 19910711

17Q First examination report despatched

Effective date: 19921103

RBV Designated contracting states (corrected)

Designated state(s): DE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE

REF Corresponds to:

Ref document number: 59005000

Country of ref document: DE

Date of ref document: 19940421

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20031002

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050401