WO2015185294A1 - Structure de boîtier intérieur pour turbomachine et son procédé de fabrication - Google Patents

Structure de boîtier intérieur pour turbomachine et son procédé de fabrication Download PDF

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Publication number
WO2015185294A1
WO2015185294A1 PCT/EP2015/059285 EP2015059285W WO2015185294A1 WO 2015185294 A1 WO2015185294 A1 WO 2015185294A1 EP 2015059285 W EP2015059285 W EP 2015059285W WO 2015185294 A1 WO2015185294 A1 WO 2015185294A1
Authority
WO
WIPO (PCT)
Prior art keywords
drainage
inner housing
housing construction
groove
slots
Prior art date
Application number
PCT/EP2015/059285
Other languages
German (de)
English (en)
Inventor
Stefan Bentele
Patrick Bison
Holger Frank
Martin Peterson
Sebastian Thiemann
Lucia Tosal-Martinez
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
Publication of WO2015185294A1 publication Critical patent/WO2015185294A1/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
    • F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/10—Manufacture by removing material

Definitions

  • the invention relates to an inner casing construction for a turbomachine, in particular a steam turbine, comprising a drainage device, wherein the drainage device comprises a collecting slot.
  • the invention relates to a method for producing an inner housing construction with a dewatering device, wherein in the inner housing construction, a collecting slot is incorporated.
  • turbomachines such as steam turbines
  • thermal energy of a water vapor is converted into rotational energy of a rotor.
  • a steam turbine is customary ⁇ divided into several sub-turbines, such as a high-pressure, medium-pressure and low-pressure turbine parts.
  • the steam parameters of the incoming steam into each turbine are different, with temperatures and pressures in the low pressure turbine being lowest.
  • the currents FFM and steam parameters but conditions in the low-pressure part ⁇ turbine are such that fog droplets entste ⁇ hen, also referred to as primary droplets and are very small.
  • Such primary droplets have hardly any diameter of more than 0.2 ⁇ m in a further expansion with a progressive condensation.
  • a common and known countermeasure is also to excrete a part of the water by centrifugal action and to remove it from the flow path.
  • a ring slit is used on the circumference, which absorbs the drops carried by centrifugal force to the outside.
  • Such a drainage slot is incorporated in the outer channel boundary. The slots are usually in the wake of the blades, so they capture the thrown by these water.
  • a steam turbine comprises a rotatably mounted rotor and an inner housing arranged around the rotor.
  • the inner pressure housing is formed as an inner housing construction and comprises in some parts a thickness of several centimeters. With such a thickness, it is a challenge to form a drainage slot having, for example, a width of 2 mm.
  • common production methods such as water jet cutting. thats why the water jet cutting in housing designs with a comparatively large thickness is not possible.
  • the invention seeks to remedy this situation.
  • the object of the inventions is to form an inner housing structure having a comparatively large thickness in a simple manner with a Ent ⁇ ->ss mecanicsschlitz is dung.
  • the inner shell construction is one with the front
  • Drainage screen is arranged in the groove.
  • the drainage screen is fitted in a groove to the left of the collection slot and to the right of the collection slot.
  • an inner housing construction with a dewatering device, wherein in the inner housing construction, a collecting slot is incorporated, wherein before the collecting slot, a drainage aperture is arranged and arranged in the dewatering aperture dewatering slots ⁇ .
  • An inner shell construction may be, for example, a vane ring.
  • the invention thus paves the way to first of all form a drainage device in the inner housing construction, specifically in the form of a collecting slot.
  • the inner housing construction is formed with a collecting slot arranged in the circumferential direction, which is equipped with conventional machining methods such as milling. can be formed.
  • the dimensioning of the collecting slot is such that a production by simple means is possible. According to the invention now becomes a separate thinner
  • Used sheet metal strip which is arranged as a drainage aperture in front of the collecting slot, wherein in the dewatering ⁇ tion aperture drainage slots are arranged, the z. B. can be introduced by conventional manufacturing processes such as water jet cutting.
  • a drainage slot has, for example, a width of about 1 mm to 2 mm.
  • Such a thin gap is well executable in the thin metal strip with the water jet cutting, but eliminates the water jet cutting in the comparatively ⁇ thick inner casing construction.
  • the thickness of the drainage aperture and the depth of the groove is selected such that the surface of the inner housing construction is continuously formed.
  • the ⁇ be indicated that the groove has a depth approximately equal to the height of the drainage aperture.
  • the inner housing construction is formed substantially rotationally symmetrical to a rotation axis.
  • the collection slot is formed by means of holes or slots at ⁇ and here is essentially a about a rotation axis circumferential annular gap.
  • the inner housing construction has a
  • the inventive method is characterized among other things by the fact that the drainage aperture ⁇ welded into the groove is introduced. Furthermore, the method is advantageously further developed in that the drainage slots are produced by water jet cutting.
  • Figure 1 is a cross-sectional view of a portion of a steam turbine
  • Figure 2 is a plan view of a part of a réellegepatu ⁇ sekonstrument
  • Figure 3 is an enlarged view of a portion of
  • Figure 4 is an illustration of a portion of a drainage aperture
  • Figure 5 is a cross-sectional view of the drainage screen
  • FIG. 1 shows a part of an inner housing construction 1 which is rotationally symmetrical about a rotation axis 2.
  • the inner housing construction may be, for example, a vane ring.
  • a rotor 3 is rotatably mounted about the rotation axis 2 and comprises at least one rotor blade.
  • row 4 (further blade rows are not shown).
  • a row of guide vanes is arranged navsymmet ⁇ manner about the axis of rotation 2.
  • 6 In flow direction after the 5 Laufschau- fei Herbert 4 is seen 7 rotatably disposed ⁇ symmetrical about the axis of rotation 2, a further guide vane row.
  • the interior housing construction 1 is intended for use in a turbomachine, for example a steam turbine.
  • the inner housing construction 1 essentially comprises a load-bearing component made of a material which has a comparatively large thickness 14. At least the thickness 14 is such that water jet cutting is not possible to incorporate a gap of comparatively small size.
  • the inner casing structure 1 comprises a dewatering device 8, wherein the dewatering device 8 has a collecting slot 9. In operation, a hot steam flows in flow direction ⁇ 5 and can lead to condensation of small droplets on the blade row 4, which may impinge by centrifugal forces to an inner surface 10 of the inner housing structure. 1 For this purpose, the dewatering device 8 is provided, which can aspirate the drops 10 striking the surface.
  • the collecting slot 9 is introduced by conventional methods and has a corresponding to a Ver ⁇ drive large width 16, 18.
  • a drainage screen 11 is arranged, wherein the drainage screen 11 has drainage slots 12 with the width 16 (not shown in detail in FIG. 1).
  • the drainage screen 11 is arranged in a groove 13 in the inner housing structure 1.
  • the drainage screen 11 consists of a thin sheet, wherein the drainage ⁇ slots 12 are produced by water jet cutting. Alternatively, other manufacturing methods can be used.
  • the thickness 14 of the drainage screen 11 and the depth 15 of the groove 13 are selected such that the surface 10 of the inner ⁇ housing structure is formed continuously.
  • the drainage screen 11 is welded by a welding process in the groove 13.
  • the width 16, 18 of the Entwässe ⁇ approximately slots 12 lies here between 1 and 2 mm.
  • the Sam- melschlitz 9 is formed as an annular gap and is connected by Boh ⁇ stanchions or elongated holes to a pressure chamber of lower pressure. Due to the resulting suction effect, steam located in front of the drainage orifice 11 is pulled in toward the inner housing structure 1. Via further lines of the steam passes to a drainage unit (not shown).
  • the inner casing construction 1 and the drainage screen 11 may be made of a same material.
  • the drainage screen 11 may comprise a different material than the inner housing construction 1.
  • the material of the drainage screen 11 may be a high-alloyed steel.
  • FIG. 2 shows a part of the inner housing construction 1.
  • FIG. 3 shows an enlarged cross-sectional view of the dewatering device 8.
  • the collecting slot 9 has a width 18.
  • the groove 13 which is constructed in two stages in the example shown in Figure 3, which means that basically a second groove 13a is arranged on ⁇ .
  • the dewatering ⁇ aperture 11 is arranged in the second groove 13 a.
  • the drainage screen 11 is welded into the groove 13a.
  • FIG. 4 shows a side view of the drainage screen 11.
  • the drainage screen 11 has a plurality of drainage slots 12 arranged in the circumferential direction 17.
  • the Ent ⁇ wasser ceremoniessschlitze 12 have a width 16, 18 between 1 mm and 2 mm and are arranged to ensure a circumferentially same effect ideally offset from each other.
  • the drainage slots 12 Viewed in a transverse direction 19 to the circumferential direction 17, the drainage slots 12 at a distance 20.
  • the drainage slots 12 are arranged at an equal distance 21.
  • the two ⁇ th row in the circumferential direction 17 of the drainage slots 12 each have been selected an equal distance 21.
  • Figure 5 shows a cross-sectional view of the ge Service ⁇ th in Figure 4 drainage aperture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne une structure de boîtier intérieur (1) pour turbomachine, en particulier une turbine à vapeur, comportant une fente de drainage (12) qui est ménagée dans une tôle mince qui est soudée devant une fente collectrice (9), les fentes de drainage (12) étant formées au jet d'eau.
PCT/EP2015/059285 2014-06-03 2015-04-29 Structure de boîtier intérieur pour turbomachine et son procédé de fabrication WO2015185294A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14170959.2 2014-06-03
EP14170959.2A EP2952700A1 (fr) 2014-06-03 2014-06-03 Agencement de boîtier intérieur pour une turbomachine et procédé associé de manufacture

Publications (1)

Publication Number Publication Date
WO2015185294A1 true WO2015185294A1 (fr) 2015-12-10

Family

ID=50884731

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/059285 WO2015185294A1 (fr) 2014-06-03 2015-04-29 Structure de boîtier intérieur pour turbomachine et son procédé de fabrication

Country Status (2)

Country Link
EP (1) EP2952700A1 (fr)
WO (1) WO2015185294A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB388156A (en) * 1930-12-13 1933-02-23 Asea Ab Improvements in means for draining off moisture from the steam in steam turbines
CA1006448A (en) * 1971-09-09 1977-03-08 Ukrainsky Nauchno-Issledovatelsky Institut Prirodnykh Gazov Turboexpander
GB1484289A (en) * 1975-09-26 1977-09-01 English Electric Co Ltd Steam turbines
JPH0337303A (ja) * 1989-07-05 1991-02-18 Hitachi Ltd 蒸気タービン
JP2001090506A (ja) * 1999-09-22 2001-04-03 Hitachi Ltd 静翼及び蒸気タービン

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2038047A1 (de) * 1970-07-31 1972-02-03 Maschf Augsburg Nuernberg Ag Entwässerung der Oberflachen der Leitschaufeln und des Stromungsraumes von Dampfturbinen, insbesondere Satt und Naßdampfturbinen
DD200633A1 (de) * 1981-08-24 1983-05-25 Herbert Schulze Anordnung zur entwaesserung der nassdampfstroemungen in dampfturbinen axialer bauart

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB388156A (en) * 1930-12-13 1933-02-23 Asea Ab Improvements in means for draining off moisture from the steam in steam turbines
CA1006448A (en) * 1971-09-09 1977-03-08 Ukrainsky Nauchno-Issledovatelsky Institut Prirodnykh Gazov Turboexpander
GB1484289A (en) * 1975-09-26 1977-09-01 English Electric Co Ltd Steam turbines
JPH0337303A (ja) * 1989-07-05 1991-02-18 Hitachi Ltd 蒸気タービン
JP2001090506A (ja) * 1999-09-22 2001-04-03 Hitachi Ltd 静翼及び蒸気タービン

Also Published As

Publication number Publication date
EP2952700A1 (fr) 2015-12-09

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