EP2375006A1 - Versteiftes Turbopumpengehäuse - Google Patents

Versteiftes Turbopumpengehäuse Download PDF

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Publication number
EP2375006A1
EP2375006A1 EP11160236A EP11160236A EP2375006A1 EP 2375006 A1 EP2375006 A1 EP 2375006A1 EP 11160236 A EP11160236 A EP 11160236A EP 11160236 A EP11160236 A EP 11160236A EP 2375006 A1 EP2375006 A1 EP 2375006A1
Authority
EP
European Patent Office
Prior art keywords
flange
housing
casing
web
wall
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.)
Granted
Application number
EP11160236A
Other languages
English (en)
French (fr)
Other versions
EP2375006B1 (de
Inventor
Vincent Langlois
Laurent Fabbri
Julien Kohler
François Danguy
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.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA SAS
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 SNECMA SAS filed Critical SNECMA SAS
Publication of EP2375006A1 publication Critical patent/EP2375006A1/de
Application granted granted Critical
Publication of EP2375006B1 publication Critical patent/EP2375006B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/528—Casings; Connections of working fluid for axial pumps especially adapted for liquid pumps
    • 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
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved
    • F05D2250/711—Shape curved convex

Definitions

  • the invention relates to a turbomachine casing inside which high fluid pressures are involved, such as a centrifugal pump casing or turbine.
  • the invention makes it possible at the same time to reduce the deformations and mechanical stresses on the housing and to improve the tightness, in use.
  • a casing of the type that the invention aims to improve, which comprises a body with axial symmetry in which is defined a cavity housing, in particular, the centrifugal stage of the rotor.
  • the casing body has two annular parts of different diameters.
  • the smaller diameter portion is provided to house a portion of the rotor.
  • the larger diameter portion houses a centrifugal wheel and is provided with an annular, external mounting flange for bolting to another complementary housing.
  • externally axial ribs that is to say stiffeners extending parallel to the axis
  • These axial ribs, coming from molding, may have a certain height in the radial direction, which gives the casing body a certain rigidity.
  • the flange allows the centering of the two housings and the insertion between them of a seal, ensures the seal.
  • the axial ribs make it possible to limit the deformations of the casing for a given wall thickness.
  • the flange undergoes the deformations of the housing. Under the effects of pressure, the swelling of the housing tends to rotate the flange relative to its joint plane. This can lead to an opening by "yawn” may cause leakage, loss of centering, or even a breakage of the bolting.
  • the presence of ribs requires expensive and complex manufacturing techniques, such as foundry or powder metallurgy. The stress levels remain high in the crankcase wall but also in the ribs. These stresses often require the choice of very resistant materials, so expensive and reduce the reliability and robustness of the whole.
  • the invention overcomes these difficulties through a structure tending to distribute the deformations both axially and radially in such a way that the pivoting of the flange is no longer to be feared.
  • the invention relates to a turbomachine casing with a generally annular wall, comprising two parts of different diameters, the part of larger diameter being provided with a fastening flange, characterized in that a portion of said wall is extending between said flange and the smaller diameter portion has an annularly curved shape with its convexity facing inwardly of said housing.
  • the casing further comprises an outer annular veil that in a way doubles the portion of curved shape of the wall.
  • the web extends away from this wall portion between the flange and said smaller diameter portion.
  • the casing defined above can optionally be obtained by a welded assembly or any other assembly principle excluding molding or metallurgy powders, which simplifies and reduces the cost of manufacture.
  • turbomachine 12 with a generally annular wall comprising two coaxial parts, of X axis, of different diameters.
  • the turbomachine is a turbopump comprising, in addition to the housing 11, a rotor 13 and a complementary housing 14.
  • the larger diameter part of the housing 11 comprises a fastening flange 16 having a plurality of holes 18 regularly distributed circumferentially.
  • This flange 16 is fixed to another flange 19 of the complementary casing 14 which defines with the casing 11 a cavity 21 inside which are installed the rotating elements, in this case the rotor 13 of a centrifugal pump.
  • the smaller diameter portion 23 has a generally tubular shape and houses a portion of the rotor.
  • a wall portion 25 extending between the flange 16 and the smaller diameter portion 23 has an annularly curved shape.
  • the convexity of this wall portion 25 is oriented towards the inside of the housing, as shown.
  • This characteristic allows an advantageous distribution of the thrust forces generated by the pressure prevailing inside the chamber and illustrated by the arrows F. These thrust forces are no longer oriented only parallel to the axis of rotation but are distributed in efforts axial and substantially radial forces illustrated by arrows F1. This new distribution of forces results in a straightening of the flange 16 and a less pivoting thereof around its outer edge.
  • the housing is provided with an outer annular web 29, substantially frustoconical, extending in parallel and at a distance from said portion of the wall 25 annularly curved. More particularly, this frustoconical web 29 extends between the flange 16 and said smaller diameter portion 23 of the housing. The web is attached to this smaller diameter portion at a distance d from the curved wall portion 25.
  • the presence of the web 29 further limits the pivoting of the flange under the effect of the internal pressure in the housing.
  • the web 29 has at least one opening and preferably, as shown, several openings 34 regularly distributed circumferentially. These openings make it possible to avoid the confinement of the cavity 36 created between the curved wall and the web, to possibly have access to an instrumentation and to allow access for checks, especially for aging.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP11160236.3A 2010-03-30 2011-03-29 Versteiftes Turbopumpengehäuse Active EP2375006B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1052337A FR2958324B1 (fr) 2010-03-30 2010-03-30 Carter de turbomachine rigidifie

Publications (2)

Publication Number Publication Date
EP2375006A1 true EP2375006A1 (de) 2011-10-12
EP2375006B1 EP2375006B1 (de) 2015-09-23

Family

ID=42981730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11160236.3A Active EP2375006B1 (de) 2010-03-30 2011-03-29 Versteiftes Turbopumpengehäuse

Country Status (2)

Country Link
EP (1) EP2375006B1 (de)
FR (1) FR2958324B1 (de)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB897907A (en) * 1959-02-27 1962-05-30 Sulzer Ag Hydraulic machines for hydraulic storage power stations
US4720242A (en) * 1987-03-23 1988-01-19 Lowara, S.P.A. Centrifugal pump impeller
US4775295A (en) * 1985-05-17 1988-10-04 Klein, Schanzlin & Becker Aktiengesellschaft Centrifugal pump casing
US4786238A (en) * 1984-12-20 1988-11-22 Allied-Signal Inc. Thermal isolation system for turbochargers and like machines
EP0379196A2 (de) * 1989-01-19 1990-07-25 Ebara Corporation Pumpengehäuse
EP0406868A2 (de) * 1989-07-05 1991-01-09 Ebara Corporation Kreiselpumpengehäuse
EP0413176A2 (de) * 1989-08-18 1991-02-20 Ebara Corporation Blechgehäuse, insbesondere für Radialkreiselpumpen
EP0442070A1 (de) * 1990-02-13 1991-08-21 Ebara Corporation Metallblech-Pumpengehäuse
US5184945A (en) * 1991-12-27 1993-02-09 Assoma, Inc. Bushing structure for using in magnetically driving centrifugal pumps
FR2698661A1 (fr) * 1992-11-30 1994-06-03 Europ Propulsion Turbopompe compacte de forte puissance pour moteur-fusée.
WO2009065881A1 (de) * 2007-11-20 2009-05-28 Mann+Hummel Gmbh Gehäuse für einen radialverdichter
FR2933150A1 (fr) * 2008-06-25 2010-01-01 Snecma Etage redresseur dans un compresseur de turbomachine

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB897907A (en) * 1959-02-27 1962-05-30 Sulzer Ag Hydraulic machines for hydraulic storage power stations
US4786238A (en) * 1984-12-20 1988-11-22 Allied-Signal Inc. Thermal isolation system for turbochargers and like machines
US4775295A (en) * 1985-05-17 1988-10-04 Klein, Schanzlin & Becker Aktiengesellschaft Centrifugal pump casing
US4720242A (en) * 1987-03-23 1988-01-19 Lowara, S.P.A. Centrifugal pump impeller
EP0379196A2 (de) * 1989-01-19 1990-07-25 Ebara Corporation Pumpengehäuse
EP0406868A2 (de) * 1989-07-05 1991-01-09 Ebara Corporation Kreiselpumpengehäuse
EP0413176A2 (de) * 1989-08-18 1991-02-20 Ebara Corporation Blechgehäuse, insbesondere für Radialkreiselpumpen
EP0442070A1 (de) * 1990-02-13 1991-08-21 Ebara Corporation Metallblech-Pumpengehäuse
US5184945A (en) * 1991-12-27 1993-02-09 Assoma, Inc. Bushing structure for using in magnetically driving centrifugal pumps
FR2698661A1 (fr) * 1992-11-30 1994-06-03 Europ Propulsion Turbopompe compacte de forte puissance pour moteur-fusée.
WO2009065881A1 (de) * 2007-11-20 2009-05-28 Mann+Hummel Gmbh Gehäuse für einen radialverdichter
FR2933150A1 (fr) * 2008-06-25 2010-01-01 Snecma Etage redresseur dans un compresseur de turbomachine

Also Published As

Publication number Publication date
FR2958324A1 (fr) 2011-10-07
FR2958324B1 (fr) 2015-12-25
EP2375006B1 (de) 2015-09-23

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