WO2019048184A1 - Turbine à vapeur à chambre de soutirage - Google Patents

Turbine à vapeur à chambre de soutirage Download PDF

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Publication number
WO2019048184A1
WO2019048184A1 PCT/EP2018/071869 EP2018071869W WO2019048184A1 WO 2019048184 A1 WO2019048184 A1 WO 2019048184A1 EP 2018071869 W EP2018071869 W EP 2018071869W WO 2019048184 A1 WO2019048184 A1 WO 2019048184A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
sealing ring
inner housing
projection
outer housing
Prior art date
Application number
PCT/EP2018/071869
Other languages
German (de)
English (en)
Inventor
Martina Holder
Yevgen Kostenko
Oliver Myschi
Uwe Zander
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to CN201880058213.6A priority Critical patent/CN111065796A/zh
Publication of WO2019048184A1 publication Critical patent/WO2019048184A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • 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 rotor rotatably mounted, a housing disposed around the rotor inside the housing, a valve disposed about the inner ⁇ housing outer casing, a space formed between the rotor and the inner housing flow channel, an inflow region for the inflow of steam into the Flow channel, a discharge area for the outflow of steam from the flow channel, a tapping chamber, which is formed between the réellege ⁇ housing and the outer housing, a tap that produces a fluidic connection between the Strö ⁇ mungskanal and the tapping 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 rotatably mounted about a rotational axis rotor, a rotor disposed around the inner housing and in to the inner housing angeord ⁇ scribed outer 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 hereby converted into me ⁇ chanic energy of the rotor.
  • the mechanical Ro ⁇ tationsenergie of the rotor is converted into a generator in electrical ⁇ specific energy.
  • a tap is formed in the inner housing, which produces a flow ⁇ technical 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. So ⁇ far the outer casing is formed divided in an axial direction, forces, caused by the pressure in the tapping chamber, act on the outer casing.
  • the materials and fasteners such. B. screws must therefore ge ⁇ suitable to be selected.
  • the invention seeks to remedy this situation.
  • a turbomachine in particular steam turbine, in particular a high-pressure ⁇ steam turbine, which is designed for steam at a live steam temperature of about 500 ° C, comprising a rotatably gela ⁇ siege rotor, an inner housing arranged around the rotor, a outer casing disposed around the inner casing, a flow channel formed between the rotor and the inner casing, an inflow region for flowing steam into the flow channel, an outflow region for discharging steam from the flow channel, a tapping chamber formed between the inner casing and the outer casing An ⁇ tap, which produces a fluidic connection between the flow channel and the tapping chamber, the Au ⁇ Hzgephase having 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 sealing ring projection, wherein the internal nengetude with an annular projection in the formed by the housing projection and the second sealing ring projection circumferential annular space and is fixed
  • the aim is thus pursued to minimize the pressure ⁇ force, caused by the bleed steam in the tap 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 Anzapfhunt is fluidically connected to a draw-off ⁇ with the flow channel and is made to flow through a bleed steam.
  • Figure 1 is a cross-sectional view of a steam turbine in a container ⁇ design according to the prior art
  • Figure 2 is a cross-sectional view of a steam turbine in pot ⁇ design according to the invention.
  • FIG. 1 shows a cross-sectional view of a turbomachine designed as a steam turbine 1.
  • Figure 1 shows 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 ei ⁇ NEN about a rotational axis 2 rotatably mounted rotor 3.
  • ⁇ On a surface 4 of the rotor 3 blades 5 are arranged ⁇ .
  • only one rotor blade is provided with the reference numeral 5.
  • On an inner Oberflä ⁇ che 7 of the inner housing 6 vanes 8 are arranged.
  • only one guide 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 is not shown in detail in FIG.
  • the inner housing shell 6a 6b is connected non-positively via a non-illustrated parting line with the inner housing part, wherein the parting line in the installed state together amount ⁇ horizontally, vertically or in any other position rotated about the axis of rotation 2 may be arranged.
  • the outer case 9 includes a split in the axial direction Au ⁇ Hzgephaseuse front part 9a and an outer housing rear part 9b.
  • the outer housing front part 9a is connected by means of a ringbe ⁇ attachment 10 with the outer housing 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.
  • Anlegevorsprung 11 is formed in a cross-sectional view is substantially rectangular and is axially fixed in the outer housing between a housing projection 12 of the outer housing 9 and a screwed into the Au ⁇ Hzgephaseuse threaded ring 16, wherein the threaded ring 16 has an outer thread 17, which in an inner thread 18th 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 steam space 14, which is located between the outer casing front part 9a and the inner casing 6, from flowing along an axial direction in the direction of an outflow region 15.
  • a flow channel 19 is formed.
  • 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 Outflow region 15 and there has 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 integrally formed 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 a fluidic connection between the
  • the tapping chamber 22 is bounded by an inner surface 26 of the outer housing rear part 9b. Furthermore, in the axial direction, the tapping chamber 22 is delimited by a limiting surface 27, which is formed integrally 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 in the Anzapf ⁇ chamber 22.
  • the pressure of the steam in the tapping chamber 22 is greater than the pressure of the steam in the tapping chamber
  • Steam turbine 1 shown. 2 shows a cross-sectional view of the steam turbine ⁇ invention 1.
  • the Au .gepuruse rear portion 9b is in this case compared to the foundedge ⁇ housing front section 9b according to the prior art (see Figure 1) modified.
  • the outer case rear part 9b is formed with a second seal ring projection 28.
  • the second sealing ring projection 28 projects up to the periphery 25 of the inner housing 6.
  • Between the second sealing ring projection 28 and the inner housing 6 is a further seal 29 angeord ⁇ net.
  • the tapping chamber 22 is now according to the invention by the first sealing ring projection 23 and the second sealing ring ledge 28 is limited.
  • the tapping chamber 22 is formed between the first sealing ring projection 23 and the second sealing ring projection 28.
  • a threaded ring 30 is formed in front of the tapping chamber 22.
  • This threaded ring 30 is fluidly connected via one or more compensation line (s) 31 with 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 at the landing projection 11 in the annulus 30 flows past. 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 Aus GmbHslei ⁇ device 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 the 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)

Abstract

L'invention concerne une turbomachine, en particulier une turbine à vapeur (1), comprenant une chambre de soutirage (22) qui est disposée entre une première saillie de bague d'étanchéité (23) et une deuxième saillie de bague d'étanchéité (28), la première saillie de bague d'étanchéité (23) et la seconde saillie de bague d'étanchéité (28) étant réalisées d'un seul tenant avec le boîtier extérieur (9) et s'appliquant de manière étanche contre le boîtier intérieur (6).
PCT/EP2018/071869 2017-09-08 2018-08-13 Turbine à vapeur à chambre de soutirage WO2019048184A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880058213.6A CN111065796A (zh) 2017-09-08 2018-08-13 具有排气腔的汽轮机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17190075.6 2017-09-08
EP17190075.6A EP3453848A1 (fr) 2017-09-08 2017-09-08 Turbine à vapeur dotée d'une chambre de piquage

Publications (1)

Publication Number Publication Date
WO2019048184A1 true WO2019048184A1 (fr) 2019-03-14

Family

ID=59829271

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/071869 WO2019048184A1 (fr) 2017-09-08 2018-08-13 Turbine à vapeur à chambre de soutirage

Country Status (3)

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

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
EP2101044A1 (fr) * 2008-03-13 2009-09-16 Siemens Aktiengesellschaft Turbine à vapeur dotée d'un boîtier intérieur séparé
EP2101042A1 (fr) * 2008-03-10 2009-09-16 Siemens Aktiengesellschaft Turbine à vapeur dotée de frettes
US20160312636A1 (en) * 2014-01-27 2016-10-27 Mitsubishi Hitachi Power Systems, Ltd. Fluid seal structure of heat engine including steam turbine
EP3128134A1 (fr) * 2015-08-06 2017-02-08 Siemens Aktiengesellschaft Agencement pour une turbine a vapeur et procédé de fixation associé

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216513A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Raccordement de soupape sur une turbomachine à trois coques
EP2216512A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Turbine à vapeur à trois coques
EP2987952A1 (fr) * 2014-08-20 2016-02-24 Siemens Aktiengesellschaft Turbine à vapeur et procédé de fonctionnement d'une turbine à vapeur

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 (fr) * 2008-03-10 2009-09-16 Siemens Aktiengesellschaft Turbine à vapeur dotée de frettes
EP2101044A1 (fr) * 2008-03-13 2009-09-16 Siemens Aktiengesellschaft Turbine à vapeur dotée d'un boîtier intérieur séparé
US20160312636A1 (en) * 2014-01-27 2016-10-27 Mitsubishi Hitachi Power Systems, Ltd. Fluid seal structure of heat engine including steam turbine
EP3128134A1 (fr) * 2015-08-06 2017-02-08 Siemens Aktiengesellschaft Agencement pour une turbine a vapeur et procédé de fixation associé

Also Published As

Publication number Publication date
EP3453848A1 (fr) 2019-03-13
CN111065796A (zh) 2020-04-24

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