WO2013017489A1 - Carter pour turbomachine - Google Patents

Carter pour turbomachine Download PDF

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Publication number
WO2013017489A1
WO2013017489A1 PCT/EP2012/064555 EP2012064555W WO2013017489A1 WO 2013017489 A1 WO2013017489 A1 WO 2013017489A1 EP 2012064555 W EP2012064555 W EP 2012064555W WO 2013017489 A1 WO2013017489 A1 WO 2013017489A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
stiffening rib
length
rib
trapezoidal shape
Prior art date
Application number
PCT/EP2012/064555
Other languages
German (de)
English (en)
Inventor
Christoph Kästner
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 CN201290000725.5U priority Critical patent/CN204060828U/zh
Publication of WO2013017489A1 publication Critical patent/WO2013017489A1/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
    • 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
    • F01D25/243—Flange connections; Bolting arrangements
    • 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
    • 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
    • F05D2250/00—Geometry
    • F05D2250/10—Two-dimensional
    • F05D2250/13—Two-dimensional trapezoidal

Definitions

  • the invention relates to a housing for a flow machine, wherein the housing is formed substantially around a rotation axis, wherein the housing has a stiffening rib.
  • any turbine or sub-turbine is understood, which is traversed by a working medium in the form of steam.
  • ⁇ the gas turbines with gas and / or air flows through as the working medium, however, completely different temperature and pressure conditions than the steam in a steam turbine.
  • the working medium having the highest temperature and flowing to a partial turbine at the same time has the highest pressure.
  • An open cooling system which is open to the flow channel, can be realized at Gastur ⁇ turbines even without external supply of cooling medium.
  • an external supply for cooling medium should be provided. The prior art relating to gas turbines can not therefore be used for the assessment of the present application subject.
  • a steam turbine typically comprises a rotor rotatably mounted occupied with turbines ⁇ shovels, which is arranged within a housing or the housing shell.
  • the rotor In ⁇ through flow of the interior of the flow channel formed by the housing jacket and with heated steam under pressure, the rotor is placed on the blades by the steam in rotation.
  • the turbine blades of the rotor are also referred to as blades.
  • usually stationary guide vanes are suspended on the inner housing, which engage along an axial extent of the body in the interspaces of the rotor blades.
  • the housing jacket of such a steam turbine can be formed from a number of housing segments.
  • a housing jacket of the steam turbine is to be understood as meaning, in particular, the stationary housing component of a steam turbine or a partial turbine, which has an interior in the form of a flow channel along the longitudinal direction of the steam turbine, which is intended to flow through with the working medium in the form of steam.
  • this can be an inner housing and / or a guide vane carrier.
  • Steam turbines are formed with a so-called inner housing, wherein the inner housing is arranged around the rotor and carries the so-called vanes. Between the rotor and the inner housing of the so-called flow channel is formed ⁇ , in which the thermal energy of incoming steam is converted into rotational energy substantially. Formed around the inner housing is an outer housing arranged to form a gap.
  • the inner housing comprises an inner housing upper part and an inner housing lower part. The inner housing upper part and the inner housing lower part are fastened to each other via a flange which is arranged in the horizontal direction by means of known fastening means.
  • Such inner housing are comparatively large components with a high weight.
  • the inner housing is ge ⁇ poured out and, therefore, also has a relatively high weight.
  • the housing is elongated along a rotation axis. Therefore the inner housing additive material is taken into account for reasons of strength in a 12 o'clock position of the inner housing and at the 6 o'clock position, which is referred to as auctioning ⁇ Fung rib.
  • This stiffening rib is essentially a sudden material thickening of the inner housing at a local location. This local location, as described above, is located at the 12 o'clock and 6 o'clock positions of the inner housing, respectively.
  • As a result of gravity will sagging of the inner housing preferably avoided in housing with ⁇ telteil.
  • the radial clearance between the tips of the blades and the inner housing are as low as possible, the radial clearance during the entire operating temperature range of 20 ° C (room temperature Tempera ⁇ ) to 650 ° C are sufficiently large.
  • the inner housing has an increased strength.
  • a housing for a Strö ⁇ mung machine wherein said housing is formed substantially around a rotational axis, said housing having an Ver ⁇ steifungsrippe, wherein the stiffening rib, viewed in cross-section has a trapezoidal shape ⁇ .
  • the stiffening rib ⁇ is being constructed similar to the parting line of the housing.
  • the stiffening rib has a rectangular shape according to the prior art in cross section ⁇ seen.
  • the stiffening ⁇ rib according to an A-shape.
  • material from the top of the stiffening rib where there is no useful advantage, is moved down closer to the housing surface, where it has an influence on the mechanical rigidity of the inner housing.
  • the shape of the trapezoidal rib further improves the ovality of housings with the same material usage. Should even the same oval shape as in a conventional loan stiffening rib can be achieved, even Ge ⁇ felmaterialintra could be reduced for the stiffening rib ⁇ to.
  • a further advantage of the invention is that thereby the castability of the housing is improved, as at the interface ⁇ point between the peripheral contour, which is formed by the housing surface and the stiffening rib contour, which is formed by a stiffening rib surface, susceptible to cracking.
  • the stiffening rib is to be understood as a local material thickening ⁇ showing a comparatively sprunghaf- th increase over the housing or housing thickness contour.
  • the stiffening rib is designed here as a pure stiffening rib. This means that on the stiffening rib no projections, indentations or the like are provided, which are provided for other components.
  • the auctioning ⁇ Fung rib is formed accordingly as a pure component from ⁇ trapezoidal.
  • the trapezoidal shape is formed isosceles.
  • a trapezoidal shape can be described by two parallel sides and two legs.
  • the legs are formed isosceles, ie, that the legs have the same length on ⁇ .
  • This symmetrical design of the stiffening rib ⁇ unwanted distortions in the circumferential direction can be avoided.
  • the housing is formed along a rotation axis and has a length L, wherein the stiffening rib extends over a length 1 along the axis of rotation, where: 1> 80% L.
  • the stiffening ⁇ rib almost completely formed over the length of the housing.
  • the rigidity is increased overall.
  • the cross section of the stiffening rib which is trapezoidal in shape, is unchanged along the length L. That is, the length of the upper side and the length of the legs are unchanged along the axis of rotation.
  • the angle range between a leg of the trapezoidal shape and a perpendicular to one side is between 10 ° and 30 °.
  • the angle is 17 °.
  • the stiffening rib is arranged in the installed state substantially in the 12 o'clock position.
  • FIG. 1 shows a perspective view of a housing upper ⁇ part
  • FIG. 3 shows a cross-sectional view of a stiffening rib.
  • FIG. 1 shows a perspective view of a housing 1 for a turbomachine, such as a Dampftur ⁇ bine.
  • the housing 1 extends substantially over a length L.
  • a rotor not shown, is rotatably mounted about a rotation axis 2.
  • the housing upper part shown in FIG. 1 is connected to a lower housing part (not shown) by means of a flange 3 by means of known means Fastening means, for. As screws, connected together.
  • the flange 3 is formed as a material projection in a radial direction 4.
  • the housing 1 comprises a housing surface 5, which is formed substantially rotationally symmetrical about the axis of rotation 2.
  • the housing 1 is a casting with a comparatively high casting weight.
  • the length L extends over several meters.
  • a stiffening rib 6 is attached to the housing 1 in a 12 o'clock position 7 for this purpose.
  • This stiffening rib 6 is formed over a length 1 along the axis of rotation 2.
  • the length L of the Geotrou ⁇ ses is identical to the length 1 of the rib 6.
  • the rib 6 is characterized by a material projection in the radial direction. 4 This means that ent ⁇ long the housing surface 5 is formed at a discontinuity point 8, a sudden increase in material.
  • This formed from additional material reinforcing rib 6 has a trapezoidal shape in cross section.
  • the trapezoidal shape is characterized ⁇ by a circumferentially substantially parallel side S and a first leg 9 and a second leg 10.
  • the first leg 9 is in this case as long as the second leg 10.
  • the trapezoidal shape has a lower side 11, the an imaginary extension of the housing surface 5 is ⁇ represents.
  • FIG 2 discloses a side view of the housing 1.
  • the lower side 11 is shown here by a dashed line.
  • an angle is formed which assumes values between 10 ° and 30 ° and is preferably 17 ° before ⁇ .
  • a second angle ß is formed, which also assumes values between 10 ° and 30 °, preferably assumes 17 °.
  • the angle beta and the same size, so that the trapezoidal shape of an isosceles trapezoid shape is ⁇ represents.
  • the housing is formed along the rotation axis 2 of ⁇ , where: the cross section of trapezoidal shape, as shown in the figures 1-3, remains unchanged along the length of the first Between the lower side 11 and the side S, a height h is formed, wherein the height h has between 1.0 and 3.0 of the length S.
  • the stiffening rib 6 is arranged according to FIG. 1 and FIG. 2 at the 12 o'clock position 7. Such a stiffening rib 6 according to the invention can also be arranged on a housing not shown in more detail Darge ⁇ set in a 6 o'clock position.

Landscapes

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

Abstract

La présente invention concerne un carter (1) pour une turbomachine, de préférence une turbine à vapeur, le carter (1) étant formé sensiblement autour d'un axe de rotation (2) et comprenant, dans sa position à 12 heures, une nervure de renfort (6) de forme trapézoïdale.
PCT/EP2012/064555 2011-07-29 2012-07-25 Carter pour turbomachine WO2013017489A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201290000725.5U CN204060828U (zh) 2011-07-29 2012-07-25 用于流体机械的壳体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11175953A EP2551472A1 (fr) 2011-07-29 2011-07-29 Boîtier pour une turbomachine
EP11175953.6 2011-07-29

Publications (1)

Publication Number Publication Date
WO2013017489A1 true WO2013017489A1 (fr) 2013-02-07

Family

ID=46603927

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/064555 WO2013017489A1 (fr) 2011-07-29 2012-07-25 Carter pour turbomachine

Country Status (3)

Country Link
EP (1) EP2551472A1 (fr)
CN (1) CN204060828U (fr)
WO (1) WO2013017489A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT35712B (de) * 1907-12-07 1909-01-11 Bbc Brown Boveri & Cie Mehrstufige Dampf-Überdruck-Turbine.
CH112678A (de) * 1924-12-31 1925-11-16 Gen Electric Co Ltd Mit elastischem Fluidum arbeitende Turbine.
DE1289535B (de) * 1959-12-09 1969-02-20 Siemens Ag Einrichtung an doppelgehaeusigen Turbinen, insbesondere Dampfturbinen, zur ausgerichteten Abstuetzung des Innengehaeuses oder Leitschaufeltraegers
DE102006012363A1 (de) * 2005-03-31 2006-10-05 Alstom Technology Ltd. Strömungsmaschine
EP1719880A1 (fr) * 2005-05-03 2006-11-08 Siemens Aktiengesellschaft Turbine à vapeur
DE102006007088A1 (de) * 2005-05-16 2006-11-23 Mitsubishi Heavy Industries, Ltd. Turbinengehäuseaufbau
US20080286099A1 (en) * 2007-05-17 2008-11-20 General Electric Company Steam turbine exhaust hood and method of fabricating the same
DE102009003377A1 (de) * 2008-01-22 2009-07-30 General Electric Co. Turbinengehäuse mit einem Hilfsflansch
DE102009044089A1 (de) * 2008-09-30 2010-04-01 General Electric Co. Verfahren und Vorrichtung zur Anpassung der thermisch wirksamen Masse und Steifigkeit von verschraubten Teilringen
EP2182175A2 (fr) * 2008-10-30 2010-05-05 General Electric Company Structure de boîtier et procédé pour améliorer la reponse thermique d'une turbine pendant des modes operatoires transitoires et stables

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT35712B (de) * 1907-12-07 1909-01-11 Bbc Brown Boveri & Cie Mehrstufige Dampf-Überdruck-Turbine.
CH112678A (de) * 1924-12-31 1925-11-16 Gen Electric Co Ltd Mit elastischem Fluidum arbeitende Turbine.
DE1289535B (de) * 1959-12-09 1969-02-20 Siemens Ag Einrichtung an doppelgehaeusigen Turbinen, insbesondere Dampfturbinen, zur ausgerichteten Abstuetzung des Innengehaeuses oder Leitschaufeltraegers
DE102006012363A1 (de) * 2005-03-31 2006-10-05 Alstom Technology Ltd. Strömungsmaschine
EP1719880A1 (fr) * 2005-05-03 2006-11-08 Siemens Aktiengesellschaft Turbine à vapeur
DE102006007088A1 (de) * 2005-05-16 2006-11-23 Mitsubishi Heavy Industries, Ltd. Turbinengehäuseaufbau
US20080286099A1 (en) * 2007-05-17 2008-11-20 General Electric Company Steam turbine exhaust hood and method of fabricating the same
DE102009003377A1 (de) * 2008-01-22 2009-07-30 General Electric Co. Turbinengehäuse mit einem Hilfsflansch
DE102009044089A1 (de) * 2008-09-30 2010-04-01 General Electric Co. Verfahren und Vorrichtung zur Anpassung der thermisch wirksamen Masse und Steifigkeit von verschraubten Teilringen
EP2182175A2 (fr) * 2008-10-30 2010-05-05 General Electric Company Structure de boîtier et procédé pour améliorer la reponse thermique d'une turbine pendant des modes operatoires transitoires et stables

Also Published As

Publication number Publication date
CN204060828U (zh) 2014-12-31
EP2551472A1 (fr) 2013-01-30

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