EP3453848A1 - Dampfturbine mit anzapfkammer - Google Patents

Dampfturbine mit anzapfkammer Download PDF

Info

Publication number
EP3453848A1
EP3453848A1 EP17190075.6A EP17190075A EP3453848A1 EP 3453848 A1 EP3453848 A1 EP 3453848A1 EP 17190075 A EP17190075 A EP 17190075A EP 3453848 A1 EP3453848 A1 EP 3453848A1
Authority
EP
European Patent Office
Prior art keywords
inner housing
housing
sealing ring
turbomachine according
projection
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Withdrawn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
EP17190075.6A
Other languages
German (de)
English (en)
French (fr)
Inventor
Martina Holder
Yevgen Kostenko
Oliver Myschi
Uwe Zander
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 EP17190075.6A priority Critical patent/EP3453848A1/de
Priority to PCT/EP2018/071869 priority patent/WO2019048184A1/de
Priority to CN201880058213.6A priority patent/CN111065796A/zh
Publication of EP3453848A1 publication Critical patent/EP3453848A1/de
Withdrawn legal-status Critical Current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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/105—Final actuators by passing part of the fluid
    • 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

Definitions

  • the invention relates to a turbomachine, in particular a steam turbine, comprising a rotatably mounted rotor, an inner housing arranged around the rotor, an outer housing arranged around the inner housing, a flow channel formed between the rotor and the inner housing, an inflow area for the inflow of steam into the flow passage, an outflow region for discharging steam from the flow channel, a bleed chamber formed between the inner casing and the outer casing, a tap which establishes a fluidic connection between the flow channel and the bleed chamber.
  • Steam turbines as an embodiment of a turbomachine generally have several sub-turbines, which are divided into high-pressure, medium-pressure and low-pressure turbine sections. The division is based on thermodynamic considerations.
  • Essential components of a steam turbine are a rotor rotatably mounted about an axis of rotation, an inner housing arranged around the rotor and an outer housing arranged around the inner housing. Between the rotor and the inner housing, a flow channel is formed. This flow channel has guide vanes arranged on the inner housing and rotor blades arranged on the rotor. A steam flowing into this flow channel flows past the guide and moving blades. The thermal energy of the steam is converted into mechanical energy of the rotor. The mechanical rotational energy of the rotor is converted into electrical energy in a generator.
  • a tap is formed in the inner housing, which produces a fluidic connection between the flow channel and a tapping chamber, which is formed between the inner housing and the outer housing.
  • the pressure in this tapping chamber leads to mechanical loads on the steam turbine, in particular of the outer housing. If the outer housing is formed divided in an axial direction, forces, caused by the pressure in the tapping chamber, act on the outer housing. The materials and fasteners such. B. screws must therefore be selected appropriately.
  • the invention seeks to remedy this situation.
  • a turbomachine in particular a steam turbine, in particular a high-pressure steam turbine, which is designed for steam at a live steam temperature of over 500 ° C., comprising a rotatably mounted rotor, an inner casing arranged around the rotor, an outer casing arranged around the inner casing, a flow channel formed between the rotor and the inner housing, an inflow region for flowing steam into the flow channel, an outflow region for discharging steam from the flow channel, a bleed chamber formed between the inner casing and the outer casing, a tap forming a fluidic connection between the flow channel and the tapping chamber, wherein the outer housing has a first sealing ring projection and a second sealing ring projection, which are arranged sealingly around the inner housing and the tapping chamber between the first and the second Dic Htringvorsprung is formed.
  • the invention thus has the aim of minimizing the pressure force caused by the bleed steam in the bleed chamber on the outer housing.
  • a tapping chamber is formed according to the invention, which is limited in the axial direction by the outer housing.
  • the outer housing sealingly rests on a first sealing ring projection and a second sealing ring projection on the inner housing and between the first sealing ring projection and the second sealing ring projection a tapping chamber is formed.
  • This tapping chamber is fluidly connected via a tap to the flow channel and is flown with a bleed steam. Because this tapping chamber is limited in the axial direction by the outer housing itself, no additional axial forces caused by the tapping pressure act on the screwing of the outer housing, so that dimensioning of the assemblies involved for these additional forces is avoided.
  • the FIG. 1 shows a cross-sectional view of a turbine formed as a steam turbine 1.
  • the shows FIG. 1 a cross-sectional view of a high-pressure steam turbine, which is designed for steam at a live steam temperature of about 500 ° C.
  • the steam turbine 1 has a rotor 3 rotatably mounted about a rotation axis 2. On a surface 4 of the rotor 3 blades 5 are arranged. For reasons of clarity, only one blade is provided with the reference numeral 5.
  • an inner housing 6 is arranged. On an inner surface 7 of the inner housing 6 vanes 8 are arranged. For reasons of clarity, only one vane is provided with the reference numeral 8.
  • the inner housing 6 comprises an inner housing upper part 6a and an inner housing lower part 6b, which in the FIG. 1 not shown in detail.
  • the inner housing upper part 6a is non-positively connected to the inner housing lower part 6b via a parting joint (not shown), wherein the parting line in the assembled state can be arranged horizontally, vertically or in any other position rotated about the rotation axis 2.
  • the outer case 9 includes an outer case front part 9a divided in the axial direction and an outer case rear part 9b.
  • the outer housing front part 9a is by means of a screw fastening 10 is connected to the outer case rear part 9b.
  • the outer housing 9 is thus formed as a so-called pot housing.
  • annular abutment projection 11 is formed at the outer periphery of the inner housing 6, at the outer periphery of the inner housing 6, an annular abutment projection 11 is formed.
  • the annular abutment projection 11 is formed substantially rectangular in cross-sectional view and is axially fixed in the outer housing between a housing projection 12 of the outer housing 9 and a screwed into the outer housing threaded ring 16, wherein the threaded ring 16 has an outer thread 17, which in an internal thread 18th of the outer housing front part 9a engages.
  • a seal 13 is arranged between the contact projection 11 and the housing projection 12. This is intended to prevent a vapor located in a vapor space 14, which is located between the outer housing front part 9a and the inner housing 6, from flowing along an axial direction in the direction of an outflow region 15.
  • a flow channel 19 is formed between the rotor 3 and the inner housing 6, a flow channel 19 is formed. Through the flow channel 19, a steam flows with a thermal energy. The thermal energy of the steam is converted into mechanical rotational energy of the rotor 3.
  • the steam which may have temperatures of about 500 ° C and a pressure of about 300bar, flows into the flow channel.
  • the effluent from the flow channel steam flows into the discharge area 15 and has there a lower temperature and a lower pressure.
  • a tap 21 is formed.
  • the tap 21 establishes a fluidic connection between the flow channel 19 and a tapping chamber 22.
  • This tapping chamber 22 is formed by a first sealing ring projection 23, which is formed integrally from the outer housing rear part 9b and sealingly abuts a seal 24 on an outer edge 29 of the inner housing 6.
  • the seal 24 prevents fluid communication between the discharge area 15 and the tapping chamber 22.
  • the tapping chamber 22 is defined by an inner surface 26 of the outer housing rear portion 9b. Further, in the axial direction, the tap chamber 22 is defined by a restricting surface 27 integrally formed with the annular abutment projection 11. The boundary surface 27 is arranged opposite the housing projection 12. Sealed this space with seals 13 and 33In the tapping chamber 22, therefore, the threaded ring 16 is arranged. The vapor from the flow channel 19 can flow via the tap 21 into the tapping chamber 22. The pressure of the steam in the tapping chamber 22 is greater than the pressure of the steam in the outflow region 15. This results in a force acting on the outer housing rear part 9b and the mechanical addition of the screw fastening 10.
  • FIG. 2 an embodiment of the steam turbine 1 according to the invention is shown.
  • the FIG. 2 shows a cross-sectional view of the steam turbine according to the invention 1.
  • the outer housing rear part 9b is in this case compared to the outer housing front part 9b according to the prior art (see FIG. 1 ) modified.
  • the outer case rear part 9b is formed with a second seal ring projection 28.
  • the second sealing ring projection 28 protrudes up to the periphery 25 of the inner housing 6 ran.
  • a further seal 29 is arranged between the second sealing ring projection 28 and the inner housing 6, a further seal 29 is arranged.
  • the tapping chamber 22 is according to the invention now limited by the first sealing ring projection 23 and the second sealing ring projection 28.
  • the tapping chamber 22 is formed between the first seal ring projection 23 and the second seal ring projection 28.
  • a threaded ring 30 is formed in front of the tapping chamber 22.
  • This threaded ring 30 is fluidically connected via one or more compensation line (s) 31 connected to the discharge area 15, whereby in the annular space 30 always approximately the same pressure as in the discharge area 15 sets, even if in case of damage or similar case steam flows past the landing projection 11 into the annular space 30. Therefore, this precaution has been taken, which precludes an uncontrolled pressure increase in the annulus 30 in the aforementioned case of damage.
  • a second compensation line 32 is arranged in the second sealing ring projection 28, which produces a fluidic connection between the tapping chamber 22 and the threaded ring 30.
  • the effect of the equalization line 32 can be described as follows: It is possible that, when omitting the equalization line 32, temperature layers are formed in the threaded ring 30 during operation, which lead to different thermal and mechanical loads on the outer housing 9 and the inner housing 6.
  • the second compensation line (s) 32 By the second compensation line (s) 32, a forced flow is achieved, which is ensured by the comparison with the first equalization line 31 small dimensions of the second compensation line that only a relatively small volume flow of steam from the tapping chamber 22 flows into the threaded ring 30 and the pressure in Threaded ring 30 remains approximately identical to the pressure in the discharge area 15.
  • the skillful arrangement of one or more compensation line (s) 32 prevents the formation of temperature layers in the annular space 30, as it were.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP17190075.6A 2017-09-08 2017-09-08 Dampfturbine mit anzapfkammer Withdrawn EP3453848A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17190075.6A EP3453848A1 (de) 2017-09-08 2017-09-08 Dampfturbine mit anzapfkammer
PCT/EP2018/071869 WO2019048184A1 (de) 2017-09-08 2018-08-13 Dampfturbine mit anzapfkammer
CN201880058213.6A CN111065796A (zh) 2017-09-08 2018-08-13 具有排气腔的汽轮机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17190075.6A EP3453848A1 (de) 2017-09-08 2017-09-08 Dampfturbine mit anzapfkammer

Publications (1)

Publication Number Publication Date
EP3453848A1 true EP3453848A1 (de) 2019-03-13

Family

ID=59829271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17190075.6A Withdrawn EP3453848A1 (de) 2017-09-08 2017-09-08 Dampfturbine mit anzapfkammer

Country Status (3)

Country Link
EP (1) EP3453848A1 (zh)
CN (1) CN111065796A (zh)
WO (1) WO2019048184A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60169607A (ja) * 1984-02-13 1985-09-03 Hitachi Ltd 蒸気タ−ビンの蒸気室仕切り部の漏洩防止構造
JPH055403A (ja) * 1991-06-28 1993-01-14 Fuji Electric Co Ltd 蒸気タービン
EP2101042A1 (de) * 2008-03-10 2009-09-16 Siemens Aktiengesellschaft Dampfturbine mit Schrumpfringen
EP2101044A1 (de) * 2008-03-13 2009-09-16 Siemens Aktiengesellschaft Dampfturbine mit geteiltem Innengehäuse
US20160312636A1 (en) * 2014-01-27 2016-10-27 Mitsubishi Hitachi Power Systems, Ltd. Fluid seal structure of heat engine including steam turbine
EP3128134A1 (de) * 2015-08-06 2017-02-08 Siemens Aktiengesellschaft Anordnung für eine dampfturbine und zugehöriges fixierungsverfahren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216513A1 (de) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Ventilanbindung an eine dreischalige Strömungsmaschine
EP2216512A1 (de) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Dreischalige Dampfturbine
EP2987952A1 (de) * 2014-08-20 2016-02-24 Siemens Aktiengesellschaft Dampfturbine und Verfahren zum Betrieb einer Dampfturbine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60169607A (ja) * 1984-02-13 1985-09-03 Hitachi Ltd 蒸気タ−ビンの蒸気室仕切り部の漏洩防止構造
JPH055403A (ja) * 1991-06-28 1993-01-14 Fuji Electric Co Ltd 蒸気タービン
EP2101042A1 (de) * 2008-03-10 2009-09-16 Siemens Aktiengesellschaft Dampfturbine mit Schrumpfringen
EP2101044A1 (de) * 2008-03-13 2009-09-16 Siemens Aktiengesellschaft Dampfturbine mit geteiltem Innengehäuse
US20160312636A1 (en) * 2014-01-27 2016-10-27 Mitsubishi Hitachi Power Systems, Ltd. Fluid seal structure of heat engine including steam turbine
EP3128134A1 (de) * 2015-08-06 2017-02-08 Siemens Aktiengesellschaft Anordnung für eine dampfturbine und zugehöriges fixierungsverfahren

Also Published As

Publication number Publication date
CN111065796A (zh) 2020-04-24
WO2019048184A1 (de) 2019-03-14

Similar Documents

Publication Publication Date Title
DE102005045459B4 (de) Mechanische Lösung zur Schienenhalterung von Turbinendüsen
CH702000A2 (de) Wirbelkammern zur Spaltströmungssteuerung.
EP2884054A1 (de) Verstellbare Leitschaufel mit Kegelstumpf in einer Lageranordnung
CH712614B1 (de) Strömungsmaschine.
EP3307988A1 (de) Rotorkühlung für eine dampfturbine
DE102010007724A1 (de) Schraubenlose Zwischenstufendichtung einer Gasturbine
CH699978A1 (de) Dampfturbine.
EP2718545B1 (de) Dampfturbine umfassend einen schubausgleichskolben
EP2611992B1 (de) Gehäuseseitige struktur einer turbomaschine
EP2299062A1 (de) Dichtungssegment für eine Strömungsmaschine
EP2802748B1 (de) Strömungsmaschine mit schraubenkühlung
EP2396517B1 (de) Dreischalige dampfturbine
EP2829685A1 (de) Ventil für eine Strömungsmaschine
DE202015105626U1 (de) Turbinenrotorschaufel mit beweglicher Spitze
DE102013208357B3 (de) Anordnung mit einer Dichtung
EP2725200B1 (de) Leitschaufelkranz und Strömungsmaschine
EP1960636A1 (de) Strömungsmaschine
EP2601382B1 (de) Sperrschaltung bei dampfturbinen zur nassdampfabsperrung
EP3453848A1 (de) Dampfturbine mit anzapfkammer
EP3312388A1 (de) Pultdach dichtfin
EP2310633B1 (de) Verminderung der thermischen belastung eines aussengehäuses für eine strömungsmaschine
DE102013203870B4 (de) Verdrehsicherung für Turbomaschinen
AT520226B1 (de) Laufrad
EP3183426B1 (de) Kontrollierte kühlung von turbinenwellen
WO2010091928A1 (de) Dreischalige dampfturbine mit ventil

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): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20190914