EP2101044A1 - Turbine à vapeur dotée d'un boîtier intérieur séparé - Google Patents

Turbine à vapeur dotée d'un boîtier intérieur séparé Download PDF

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Publication number
EP2101044A1
EP2101044A1 EP08004712A EP08004712A EP2101044A1 EP 2101044 A1 EP2101044 A1 EP 2101044A1 EP 08004712 A EP08004712 A EP 08004712A EP 08004712 A EP08004712 A EP 08004712A EP 2101044 A1 EP2101044 A1 EP 2101044A1
Authority
EP
European Patent Office
Prior art keywords
inner housing
housing
steam turbine
outer housing
parting line
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Withdrawn
Application number
EP08004712A
Other languages
German (de)
English (en)
Inventor
Heinz Dallinger
Andreas Ulma
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP08004712A priority Critical patent/EP2101044A1/fr
Priority to PCT/EP2009/050706 priority patent/WO2009112299A1/fr
Publication of EP2101044A1 publication Critical patent/EP2101044A1/fr
Withdrawn legal-status Critical Current

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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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/246—Fastening of diaphragms or stator-rings
    • 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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • F01D25/265—Vertically split casings; Clamping arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0466—Nickel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/14—Casings or housings protecting or supporting assemblies within

Definitions

  • the invention relates to a steam turbine, comprising a housing, a rotatably mounted rotor arranged in the inner housing and an outer housing arranged around the inner housing, wherein the inner housing has an axial and radial parting line.
  • the efficiency of a turbomachine depends inter alia on the temperature of the incoming fresh steam. The higher the temperature of the live steam, the higher the expected efficiency.
  • suitable cooling options or suitable materials must be used.
  • Materials based on the so-called nickel-based materials are suitable for use in steam turbines, which are exposed to temperatures of 700 ° C.
  • the costs of nickel-based materials are comparatively high. Therefore, the weight content of nickel-based components should be kept as low as possible.
  • the maximum weight of the housing parts of the inner housing should not be too large.
  • the components are relatively highly thermally stressed.
  • the inflow region of such a high-pressure turbine part is subjected to a live steam, which may have temperatures of over 700 ° C.
  • This area is preferably made of a higher heat resistant material than an area of the high pressure turbine part that is less thermally stressed.
  • screw inner housing which consist of two different materials, to a radial parting line. With the radial parting a material change of a first inner housing part with a first material in the axial direction with a second inner housing part with a second material instead.
  • the inner casing of such a steam turbine has a total of four sub-housings.
  • the steam turbine has a first inner housing upper part and a first inner housing lower part of a first high-temperature resistant material, wherein the two aforementioned housing inner parts are connected together by an axial parting line.
  • an axial parting line With an axial parting line, the upper housing part and the lower housing part are separated in a radial direction, as viewed from the direction of rotation.
  • the inner housing comprises a second inner housing upper part and a second inner housing lower part, which are separated from one another by an axial parting line.
  • Within the inner housing vanes are mounted.
  • On the located inside the rotor housing rotor blades are mounted.
  • the inner housing parts are assembled together with the rotor.
  • the thus obtained inner casing comprising the rotor is arranged in an outer casing.
  • steam flowing out of the flow channel between the rotor and the inner housing also flows between the inner housing and the outer housing, which can lead to a high pressure and a high thermal load on the outer housing.
  • Such high pressure and temperature loads present a challenge for the outer housing. It would be desirable to have an outer housing which is suitable for comparatively high pressure loads.
  • the invention begins, whose task is to offer a steam turbine with an inner housing with a radial parting line, wherein the steam turbine has an outer housing which is suitable for high stresses such as pressure and temperature.
  • a steam turbine comprising an inner housing, a rotatably mounted rotor disposed in the inner housing and an outer housing arranged around the inner housing, wherein the inner housing has an axial and radial parting line, wherein the outer housing has a radial parting line. It is thus proposed to also manufacture the outer housing from at least two components, wherein the outer housing in this case has a material change in an axial direction, as it were.
  • the outer housing is therefore designed as a so-called. Pot housing, which is characterized by a radial parting or by the absence of an axial parting line.
  • the inner housing has a first inner housing part and an axially arranged behind it second inner housing part, wherein the first inner housing part is formed of a higher heat resistant material than the second inner housing part.
  • the first inner housing part is made of a nickel-based material.
  • the nickel-based material is suitable for steam temperatures above 700 ° C.
  • a nickel-based material is a relatively expensive material.
  • the first inner housing part and the second inner housing part are connected to each other by means of a flange, wherein the flange is axially held together by a trained as a ring nut screw on the outer housing.
  • the high pressure and the high temperature of the live steam cause a large axial thrust on the inner casing and on the rotor, resulting in a force on the inner casing and on the rotor in the axial direction
  • the outer housing is usually fixedly mounted to a substrate so that movement of the outer housing and the rotor in the turbine axis direction is effectively avoided.
  • the inner housing is clamped according to the invention in an advantageous manner via the flange by means of the screwed in the outer housing ring nut.
  • the screw can be screwed. This provides a comparatively simple way of transmitting the axial thrust, which is caused by the high pressure and the high temperature of the steam, to the outer housing.
  • the invention will be explained in more detail with reference to an embodiment.
  • the figure shows a cross-sectional view of a high-pressure turbine part.
  • the sole figure shows a high-pressure turbine part 1.
  • the essential components of the high-pressure turbine section 1 are arranged around a rotation axis 2 rotatably mounted rotor 3, arranged around the rotor 3 inner housing 4 and an outer housing 5.
  • Live steam flows through a Frischdampfeinström Scheme 6 in a flow channel 7.
  • the flow channel 7 is characterized by arranged on the rotor 3 blades and arranged on the inner housing 4 vanes. For the sake of clarity, the guide vanes and blades are not shown in detail.
  • the live steam flows in a flow direction 8 through the flow channel 7, wherein the steam is expanded and cooled.
  • About the Abdampf Scheme 9 of the expanded steam flows through the discharge port 11 from the high-pressure turbine section 1.
  • Between the outer housing 5 and the inner housing 4 is an area 10th
  • the inner housing 4 comprises a first inner housing upper part 4a and a first inner housing lower part 4b.
  • the first inner housing upper part 4a and the first inner housing lower part 4b are made of a nickel-based material.
  • the area around the live steam inflow area 6 is subjected to a high thermal load, so that the choice of the nickel-based material is suitable for the first inner housing upper and lower parts 4a, 4b.
  • the first inner housing upper part 4a and the first inner housing lower part 4b are screwed together via an axial parting line.
  • the first inner housing upper part 4a and the first inner housing lower part 4b are adjoined by a second inner housing upper part 4c and a second inner housing lower part 4d.
  • the second inner housing upper part 4c and the second inner housing lower part 4d are made of a less highly heat-resistant material than the first inner housing upper part 4a and the first inner housing lower part 4b.
  • Via a radial parting line 12 the first inner housing upper part 4a adjoins the second inner housing upper part 4c.
  • the first inner housing lower part 4b and the first inner housing lower part 4d are connected to one another via the radial parting line 12. The connection is initially via a screw 13 to bias a arranged in a second seal 20 U-ring.
  • the outer case 5 includes an outer case front part 5a and an outer case rear part 5b. Via a second radial parting line 14, the outer housing front part 5a and the outer housing rear part 5b are connected to one another via a second screw connection 15.
  • the first inner housing upper part 4a and the second inner housing upper part 4c is thus connected to one another via a flange 16.
  • the first inner housing lower part 4b and the second inner housing lower part 4d are connected via the flange 16.
  • the outer housing 5 has a surface 17, which is designed for application to a mating surface 18 of the flange 16.
  • About the threaded ring 23 of the flange 16 is screwed over the surface 17 to the outer housing 5.
  • the flange 16 may in alternative embodiments also via a screw connection with z. B. bolts are bolted to the outer housing 5.
  • a seal 19 is additionally provided, which is arranged between the outer housing 5 and the flange 16. This seal 19 is preferably formed as a U-seal.
  • a second seal 20 is provided, which is preferably formed as a U-sealing ring. In alternative embodiments, this second seal may be formed as an L-ring or other special seals. Since the area around the live steam inflow area 6 is subjected to a high thermal load, it is cooled by cooling. For this purpose, holes, which are not shown in detail, are arranged in the first inner housing upper part 4a and in the first inner housing lower part 4b in order to cool a space located between the outer housing front part 5a and the first inner housing upper part 4a or first inner housing lower part 4b. The cooling steam located in the intermediate region 21 can be made available either externally or internally.
  • a vapor is conducted from a connection 22 from the flow channel 7 into the intermediate region 21.
  • external cooling is the intermediate area 21 is acted upon by externally supplied cooling steam whose temperature is lower than that of the steam in the live steam inflow region 6 and whose pressure is slightly higher than the steam in the live steam inflow region 6.
  • Axial shear forces of the steam on the rotor 3 and on the inner housing 4 are achieved via a screw connection, not shown, between the flange 16 and the outer housing 5.
  • the axial thrust force can be achieved from the inner housing 4 via a threaded ring, not shown.
  • the inner housing 4 with the rotor 3 is initially mounted in a first method step.
  • the inner housing 4 is mounted with the rotor 3 in the outer housing 5.
  • the outer housing 5 is formed here as a pot housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP08004712A 2008-03-13 2008-03-13 Turbine à vapeur dotée d'un boîtier intérieur séparé Withdrawn EP2101044A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08004712A EP2101044A1 (fr) 2008-03-13 2008-03-13 Turbine à vapeur dotée d'un boîtier intérieur séparé
PCT/EP2009/050706 WO2009112299A1 (fr) 2008-03-13 2009-01-22 Turbine à gaz, à carter intérieur divisé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08004712A EP2101044A1 (fr) 2008-03-13 2008-03-13 Turbine à vapeur dotée d'un boîtier intérieur séparé

Publications (1)

Publication Number Publication Date
EP2101044A1 true EP2101044A1 (fr) 2009-09-16

Family

ID=39666149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08004712A Withdrawn EP2101044A1 (fr) 2008-03-13 2008-03-13 Turbine à vapeur dotée d'un boîtier intérieur séparé

Country Status (2)

Country Link
EP (1) EP2101044A1 (fr)
WO (1) WO2009112299A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3453848A1 (fr) * 2017-09-08 2019-03-13 Siemens Aktiengesellschaft Turbine à vapeur dotée d'une chambre de piquage
CN109642476A (zh) * 2016-08-23 2019-04-16 西门子股份公司 蒸汽轮机的出流壳体

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016221664A1 (de) 2016-11-04 2018-05-09 Siemens Aktiengesellschaft Gehäuseanordnung für eine Turbomaschine, sowie Verfahren zur Montage einer derartigen Gehäuseanordnung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944313C (de) * 1950-01-14 1956-07-19 Siemens Ag Axialturbine mit eingesetztem vielkraenzigem Leitschaufeltraeger
DE1037469B (de) * 1954-04-06 1958-08-28 Siemens Ag Dampfturbine mit Aussengehaeuse und darin eingesetztem Leitschaufeltraeger
US3844675A (en) * 1972-04-17 1974-10-29 Kraftwerk Union Ag Plural shell axial turbine for operation with high pressure, high temperature steam
JPS62267506A (ja) * 1986-05-15 1987-11-20 Toshiba Corp 蒸気タ−ビンのケ−シング
EP0566478A1 (fr) * 1992-04-17 1993-10-20 Gec Alsthom Electromecanique Sa Carter haute pression pour turbine à vapeur
EP1033478A2 (fr) * 1999-03-02 2000-09-06 ABB Alstom Power (Schweiz) AG Boítier pour une turbomachine thermique
JP2000282808A (ja) * 1999-03-26 2000-10-10 Toshiba Corp 蒸気タービン設備

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944313C (de) * 1950-01-14 1956-07-19 Siemens Ag Axialturbine mit eingesetztem vielkraenzigem Leitschaufeltraeger
DE1037469B (de) * 1954-04-06 1958-08-28 Siemens Ag Dampfturbine mit Aussengehaeuse und darin eingesetztem Leitschaufeltraeger
US3844675A (en) * 1972-04-17 1974-10-29 Kraftwerk Union Ag Plural shell axial turbine for operation with high pressure, high temperature steam
JPS62267506A (ja) * 1986-05-15 1987-11-20 Toshiba Corp 蒸気タ−ビンのケ−シング
EP0566478A1 (fr) * 1992-04-17 1993-10-20 Gec Alsthom Electromecanique Sa Carter haute pression pour turbine à vapeur
EP1033478A2 (fr) * 1999-03-02 2000-09-06 ABB Alstom Power (Schweiz) AG Boítier pour une turbomachine thermique
JP2000282808A (ja) * 1999-03-26 2000-10-10 Toshiba Corp 蒸気タービン設備

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109642476A (zh) * 2016-08-23 2019-04-16 西门子股份公司 蒸汽轮机的出流壳体
US11286810B2 (en) 2016-08-23 2022-03-29 Siemens Energy Global GmbH & Co. KG Outflow housing of a steam turbine
EP3453848A1 (fr) * 2017-09-08 2019-03-13 Siemens Aktiengesellschaft Turbine à vapeur dotée d'une chambre de piquage
WO2019048184A1 (fr) * 2017-09-08 2019-03-14 Siemens Aktiengesellschaft Turbine à vapeur à chambre de soutirage
CN111065796A (zh) * 2017-09-08 2020-04-24 西门子股份公司 具有排气腔的汽轮机

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Publication number Publication date
WO2009112299A1 (fr) 2009-09-17

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