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WO2015169509A1 - Compressor housing - Google Patents

Compressor housing Download PDF

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Publication number
WO2015169509A1
WO2015169509A1 PCT/EP2015/056926 EP2015056926W WO2015169509A1 WO 2015169509 A1 WO2015169509 A1 WO 2015169509A1 EP 2015056926 W EP2015056926 W EP 2015056926W WO 2015169509 A1 WO2015169509 A1 WO 2015169509A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
compressor housing
retaining
annular web
housing according
Prior art date
Application number
PCT/EP2015/056926
Other languages
German (de)
French (fr)
Inventor
Daniel Rusch
Armin Schmid
Pasquale Catalano
Original Assignee
Abb Turbo Systems 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 Abb Turbo Systems Ag filed Critical Abb Turbo Systems Ag
Publication of WO2015169509A1 publication Critical patent/WO2015169509A1/en

Links

Classifications

    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0292—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/685—Inducing localised fluid recirculation in the stator-rotor interface
    • 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
    • F05D2220/40—Application in turbochargers

Definitions

  • the invention relates to the field of exhaust gas turbochargers for supercharged internal combustion engines. It relates to the housing of the compressor of such an exhaust gas turbocharger.
  • Exhaust gas turbochargers are used to increase the performance of internal combustion engines, in particular reciprocating engines.
  • an exhaust gas turbocharger usually has a centrifugal compressor and a radial or axial turbine.
  • bypass mass flows that allow in the region of the surge limit, ie in the range of minimum volume flow and in the region of the intake limit, ie in the range of maximum volume flow promotion a shift toward smaller or larger volume flows compared with identical machines without bypass.
  • the insert wall is integrated into the inner part of the spiral. It is known from WO 2008/023070 A1 that a plurality of retaining ribs distributed over the circumference hold the axial part of the insert wall-the annular web-which is separated from the radial part of the insert wall by the stabilizer gap. Burst tests and calculations show that the connection area between the retaining ribs and the annular web can be a weak point due to the high stress in case of bursting: If the retaining rib is arranged unfavorably, it can tear the connection to the annular web at the foot point. This can lead to the ring web in unfavorable construction in case of burst completely loosens and exits axially from the compressor housing.
  • the object of the invention is to make a compressor housing by a new structural design in case of burst of the compressor wheel safer
  • the retaining element may be rotationally symmetrical in form of a ring body or a plurality of retaining elements may each be arranged locally in the region of a retaining rib.
  • the rotationally symmetrical design of the retaining element leads to a stiffening of the insert wall and thus during operation to a symmetrical deformation of the insert wall in the region of the compressor inlet, which has a favorable effect on the thermodynamics. As a result, the tolerances between the individual components can be reduced.
  • the one or more retaining elements are optionally fluiddynamically optimized already integrated in the production in the contour of the annular web or subsequently positively, force or materially secured to the ring land.
  • Fig. 1 shows in a guided along the compressor axis section
  • Compressor housing with an integrated stabilizer chamber and this to the flow channel towards limiting according to the invention equipped with a radially projecting retaining element ring web, which via
  • Retaining ribs is fastened to the compressor housing
  • Fig. 2 shows a view in the direction of the compressor axis on the compressor housing according to Fig. 1, with an annular retaining element, and
  • Fig. 3 shows a view in the direction of the compressor axis on the compressor housing according to Fig. 1, with a plurality, each arranged in the region of a retaining rib
  • Fig. 1 shows a guided along the axis of rotation of the compressor 30 section through a housing of a centrifugal compressor, as it is used for compressing air in exhaust gas turbochargers.
  • the compressor housing is divided into two, the separation into an outer compressor housing 20 and an inner compressor housing 10 in the region of the volute casing downstream of the compressor wheel.
  • the outer compressor housing 20 is on the back of the compressor wheel 30, in the figure at the right edge of the bearing housing only partially shown, attached.
  • the inner compressor housing 10 comprises a part of the spiral and the housing parts forming the flow channel upstream of the spiral, the insert wall 101 and, upstream of the compressor wheel 30, the boundary of the flow channel 14 in the intake area of the compressor wheel.
  • guide vanes 25 of the diffuser are optionally arranged on the integrated housing wall 10.
  • a radial inlet gap 12 is arranged, which by a housing part in the intake, for example a Housing part of a muffler 40 or intake manifold, and a surrounding the flow channel 14 in the intake of the compressor wheel housing part is limited. Downstream of the leading edge of the blades 31 of the compressor wheel 30 and in the overlap region to the inlet a radial stabilizer gap 1 1 is arranged.
  • the annular web 102 arranged between the circumferential columns forms the flow channel wall in the intake region of the compressor wheel 14 and is connected to the inner compressor housing via a plurality of radially outwardly directed holding ribs 103.
  • the retaining ribs can optionally be formed rotated about its axis.
  • the holding ribs can optionally be inclined against the radial direction.
  • the retaining ribs may have different deviations from the radial direction.
  • the holding ribs can also be arranged skewed in opposite directions.
  • the holding ribs can optionally be equipped with a round, conical or elliptical profile or with a flow profile.
  • the overall very soft structure of the integrated inner compressor housing has a positive effect on the behavior in the event of bursting of the compressor wheel.
  • the long housing parts can be easily deformed and absorb a large part of the energy stored in the compressor wheel.
  • the retaining element 105 arranged according to the invention on the annular rib is used.
  • the retaining element 105 is in the embodiment of FIG. 1, a circumferential, annular radial projection with a rectangular cross-section.
  • the retaining element is formed integrally with the annular web.
  • the projection may have a fluid-dynamic optimized cross-section and be integrated into the contour of the annular web.
  • the retaining element 105 can, according to the illustration, be cast integrally with the annular web during production or (not shown) can subsequently be attached to the annular web in a form-fitting, force-fitting or material-locking manner, for example by shrinking, screwing, welding or casting.
  • the retaining element 105 prevents the retaining ribs 102 from slipping off the retaining ribs in the axial direction by coming into contact with the retaining ribs.
  • FIG. 2 shows a view of a compressor housing with a first, exemplary embodiment of the retaining element according to the invention.
  • the retaining member 105 is formed as described above as an annular, outwardly directed, radial projection.
  • the ring is subdivided into a plurality of ring segment pieces which are arranged at a distance from one another.
  • the ring segment pieces are distributed such that in each case in the region of a retaining web, a retaining element 105 'is arranged.
  • Inner compressor housing Insert wall as part of the inner compressor housing Ring web Retaining ribs Retaining element (s) Stabilizer gap Entrance gap Flow channel in the intake area of the compressor Stable isator space
  • Outer compressor housing Diffuser with guide device Compressor wheel Blades of the compressor wheel Muffler Fastening means for attaching the muffler to the compressor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The compressor housing (10) of a centrifugal compressor has an annular stabiliser space (15) which is separated from the flow duct (14) by an annular web (102). The stabiliser space (15) is connected to the flow duct (14) via an inlet gap (12) upstream of the compressor rotor inlet and via a stabiliser gap (11) downstream of the compressor rotor inlet. The annular web (102) is further connected to the compressor housing (10) via multiple radial holding ribs (103). In order to hold the annular web (102) axially in the event of rupture of the compressor rotor, it is proposed to arrange, on the annular web axially between the holding ribs (103) and the stabiliser gap (11), a radially projecting retaining element (105). If, in the event of rupture, the holding ribs fail in the root region, this retaining element will retain the annular web axially by means of a form fit with the holding ribs.

Description

Verd ichtergehäuse  Compressor housing
B E S C H R E I B U N G Technisches Gebiet B E S C H R E I N T S Technical Area
Die Erfindung bezieht sich auf das Gebiet der Abgasturbolader für aufgeladene Brennkraftmaschinen. Sie betrifft das Gehäuse des Verdichters eines solchen Abgasturboladers.  The invention relates to the field of exhaust gas turbochargers for supercharged internal combustion engines. It relates to the housing of the compressor of such an exhaust gas turbocharger.
Stand der Technik State of the art
Abgasturbolader werden zur Leistungssteigerung von Brennkraftmaschinen, insbesondere Hubkolbenmotoren, eingesetzt. Dabei besitzt ein Abgasturbolader üblicherweise einen Radialverdichter und eine Radial- oder Axialturbine.  Exhaust gas turbochargers are used to increase the performance of internal combustion engines, in particular reciprocating engines. In this case, an exhaust gas turbocharger usually has a centrifugal compressor and a radial or axial turbine.
Als Kennlinien-Stabilisierungs-Massnahme wird dabei über der Radkontur des Verdichterrades etwa im ersten Viertel der Radlänge, parallel zum Ansaugkanal, ein Bypass in Form eines Ringhohlraumes innerhalb des Verdichtergehäuses vorgesehen, wobei dieser Bypass aus einer stromauf zum Verdichterrad liegenden radialen Eintrittsspalt, einem stromab zur Eintrittskante des Verdichterrades liegenden radialen Stabilisatorspalt und einem diese beiden Spalte verbindenden Stabilisatorraum gebildet ist. As a characteristic stabilization measure is thereby provided over the wheel contour of the compressor wheel approximately in the first quarter of the wheel length, parallel to the intake passage, a bypass in the form of a ring cavity within the compressor housing, said bypass from an upstream radial to the compressor impeller inlet gap, downstream to The leading edge of the compressor wheel lying radial stabilizer gap and a connecting these two column stabilizer space is formed.
Durch den parallel zum Ansaugkanal und damit zum eigentlichen Radeintritt liegenden Stabilisatorraum ergeben sich Bypassmassenströme, die im Bereich der Pumpgrenze, also im Bereich minimaler Volumenstromförderung und im Bereich der Schluckgrenze, also im Bereich maximaler Volumenstromförderung eine Verschiebung in Richtung kleinerer bzw. grösserer Volumenströme ermöglichen, verglichen mit bauartgleichen Maschinen ohne Bypass. By lying parallel to the intake passage and thus to the actual wheel inlet stabilizer space resulting bypass mass flows that allow in the region of the surge limit, ie in the range of minimum volume flow and in the region of the intake limit, ie in the range of maximum volume flow promotion a shift toward smaller or larger volume flows compared with identical machines without bypass.
Aus gewichts- und giesstechnischen Gründen kommen bei Grossladern auf der Verdichterseite vermehrt geteilte Spiralgehäuse zum Einsatz. Um die Bauteilkosten zu reduzieren, wird dabei die Einsatzwand in das Innenteil der Spirale integriert. Aus der WO 2008/023070A1 ist bekannt dass mehrere über dem Umfang verteilte Halterippen den axialen Teil der Einsatzwand - den Ringsteg - halten, welcher durch den Stabilisatorspalt vom radialen Teil der Einsatzwand abgetrennt ist. Berstversuche und -Rechnungen zeigen, dass der Verbindungsbereich zwischen den Halterippen und dem Ringsteg aufgrund der hohen Beanspruchung im Berstfall eine Schwachstelle darstellen kann: Wird die Halterippe ungünstig angeordnet, so kann die die Verbindung zum Ringsteg am Fusspunkt reissen. Dies kann dazu führen, dass sich der Ringsteg bei ungünstiger Konstruktion im Berstfall komplett löst und axial aus dem Verdichtergehäuse austritt. For reasons of weight and casting technology, split volute casings are increasingly being used on large loaders on the compressor side. In order to reduce component costs, the insert wall is integrated into the inner part of the spiral. It is known from WO 2008/023070 A1 that a plurality of retaining ribs distributed over the circumference hold the axial part of the insert wall-the annular web-which is separated from the radial part of the insert wall by the stabilizer gap. Burst tests and calculations show that the connection area between the retaining ribs and the annular web can be a weak point due to the high stress in case of bursting: If the retaining rib is arranged unfavorably, it can tear the connection to the annular web at the foot point. This can lead to the ring web in unfavorable construction in case of burst completely loosens and exits axially from the compressor housing.
Kurze Darstellung der Erfindung Brief description of the invention
Aufgabe der Erfindung ist, ein Verdichtergehäuse durch eine neue konstruktive Ausgestaltung im Berstfall des Verdichterrades sicherer zu gestalten  The object of the invention is to make a compressor housing by a new structural design in case of burst of the compressor wheel safer
Um den Ringsteg im Berstfall des Verdichterrades axial zu halten, wird erfindungsgemäss vorgeschlagen, am Ringsteg axial zwischen den Halterippen und dem Stabilisatorspalt ein radial vorstehendes Rückhalteelement anzuordnen. Reissen die Halterippen im Berstfall im Fussbereich, so wird der Ringsteg durch dieses Rückhalteelement axial durch die Halterippen formschlüssig zurückgehalten. In order to keep the ring land axially in the event of a burst of the compressor wheel, it is proposed according to the invention to arrange a radially projecting retaining element on the ring land axially between the holding ribs and the stabilizer gap. If the retaining ribs rupture in the foot region in the event of a burst, the annular web is retained in a form-fitting manner by this retaining element in an axially-locking manner by the retaining ribs.
Optional kann das Rückhaltelement rotationssymmetrisch als Ringkörper ausgebildet sein oder es können mehrere Rückhalteelemente jeweils lokal im Bereich einer Halterippe angeordnet sein. Optionally, the retaining element may be rotationally symmetrical in form of a ring body or a plurality of retaining elements may each be arranged locally in the region of a retaining rib.
Die rotationssymmetrische Ausführung des Rückhaltelements führt zu einer Versteifung der Einsatzwand und somit im Betrieb zu einer symmetrischen Deformation der Einsatzwand im Bereich des Verdichtereintritts, was sich günstig auf die Thermodynamik auswirkt. Dadurch können die Toleranzen zwischen den einzelnen Bauteilen verringert werden. The rotationally symmetrical design of the retaining element leads to a stiffening of the insert wall and thus during operation to a symmetrical deformation of the insert wall in the region of the compressor inlet, which has a favorable effect on the thermodynamics. As a result, the tolerances between the individual components can be reduced.
Das eine oder die mehreren Rückhalteelemente sind optional fluiddynamisch optimiert bereits bei der Herstellung in die Kontur des Ringstegs integriert oder nachträglich form- , kraft- oder materialschlüssig am Ringsteg befestigt. The one or more retaining elements are optionally fluiddynamically optimized already integrated in the production in the contour of the annular web or subsequently positively, force or materially secured to the ring land.
Weitere Vorteile ergeben sich aus den abhängigen Ansprüchen. Further advantages emerge from the dependent claims.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Im folgenden ist anhand der Figuren die erfindungsgemässe Vorrichtung schematisch dargestellt und näher erläutert. In allen Figuren sind gleichwirkende Elemente mit gleichen Bezugszeichen versehen: In the following, the device according to the invention is shown schematically and explained in more detail with reference to the figures. In all figures, the same elements are provided with the same reference numerals:
Fig. 1 zeigt in einem entlang der Verdichterachse geführten Schnitt ein Fig. 1 shows in a guided along the compressor axis section
Verdichtergehäuse mit einer integrierten Stabilisatorraum und einem diesen zum Strömungskanal hin begrenzenden, erfindungsgemäss mit einem radial vorstehenden Rückhalteelement ausgestatteten Ringsteg, welcher über Compressor housing with an integrated stabilizer chamber and this to the flow channel towards limiting, according to the invention equipped with a radially projecting retaining element ring web, which via
Halterippen am Verdichtergehäuse befestigt ist, Retaining ribs is fastened to the compressor housing,
Fig. 2 zeigt eine Ansicht in Richtung der Verdichterachse auf das Verdichtergehäuse nach Fig. 1 , mit einem ringförmigen Rückhaltelement, und Fig. 2 shows a view in the direction of the compressor axis on the compressor housing according to Fig. 1, with an annular retaining element, and
Fig. 3 zeigt eine Ansicht in Richtung der Verdichterachse auf das Verdichtergehäuse nach Fig. 1 , mit mehreren, jeweils im Bereich einer Halterippe angeordnetenFig. 3 shows a view in the direction of the compressor axis on the compressor housing according to Fig. 1, with a plurality, each arranged in the region of a retaining rib
Rückhalteelementen. Retaining elements.
Weg zur Ausführung der Erfindung Way to carry out the invention
Fig. 1 zeigt einen entlang der Rotationsachse des Verdichterrades 30 geführten Schnitt durch ein Gehäuse eines Radialverdichters, wie er etwa zum Verdichten von Luft in Abgasturboladern eingesetzt wird. Das Verdichtergehäuse ist zweigeteilt, wobei die Trennung in ein äusseres Verdichtergehäuse 20 und ein inneres Verdichtergehäuse 10 im Bereich des Spiralgehäuses stromabwärts des Verdichterrades erfolgt.  Fig. 1 shows a guided along the axis of rotation of the compressor 30 section through a housing of a centrifugal compressor, as it is used for compressing air in exhaust gas turbochargers. The compressor housing is divided into two, the separation into an outer compressor housing 20 and an inner compressor housing 10 in the region of the volute casing downstream of the compressor wheel.
Das äussere Verdichtergehäuse 20 ist auf der Rückseite des Verdichterrades 30, in der Figur am rechten Rand am lediglich teilweise dargestellten Lagergehäuse, befestigt. Das innere Verdichtergehäuse 10 umfasst einen Teil der Spirale sowie die den Strömungskanal stromaufwärts der Spirale bildenden Gehäuseteile, die Einsatzwand 101 sowie stromauf des Verdichterrades 30 die Begrenzung des Strömungskanals 14 im Ansaugbereich des Verdichterrades. Im Bereich stromabwärts des Verdichterrades sind an der integrierten Gehäusewand 10 optional Leitschaufelprofile 25 des Diffusors angeordnet. The outer compressor housing 20 is on the back of the compressor wheel 30, in the figure at the right edge of the bearing housing only partially shown, attached. The inner compressor housing 10 comprises a part of the spiral and the housing parts forming the flow channel upstream of the spiral, the insert wall 101 and, upstream of the compressor wheel 30, the boundary of the flow channel 14 in the intake area of the compressor wheel. In the area downstream of the compressor wheel, guide vanes 25 of the diffuser are optionally arranged on the integrated housing wall 10.
Im Innern des einteilig ausgebildeten inneren Verdichtergehäuses 10 ist der Stabilisatorraum 15 angeordnet, welcher sich in der dargestellten Ausführungsform über eine in axialer Richtung und in Umfangsrichtung unregelmässig verlaufende, relativ grosse radiale Höhe ausdehnt. Der Stabilisatorraum 15 ist über zwei Öffnungen mit dem Strömungskanal verbunden. Stromauf des Verdichterrades ist ein radialer Eintrittsspalt 12 angeordnet, welcher durch ein Gehäuseteil im Ansaugbereich, beispielsweise einem Gehäuseteil eines Schalldämpfers 40 oder Ansaugstutzens, sowie ein den Strömungskanal 14 im Ansaugbereich des Verdichterades umgebendes Gehäuseteil begrenzt ist. Stromab der Eintrittskante der Laufschaufeln 31 des Verdichterrades 30 und im Überdeckungsbereich zu dessen Einlauf ist ein radialer Stabilisatorspalt 1 1 angeordnet. Der zwischen den umlaufenden Spalten angeordnete Ringsteg 102 bildet im Ansaugbereichs des Verdichterrades 14 die Strömungskanalwand und ist über mehrere, radial nach aussen gerichtete Halterippen 103 mit dem inneren Verdichtergehäuse verbunden. In the interior of the integrally formed inner compressor housing 10 of the stabilizer space 15 is arranged, which expands in the illustrated embodiment via a in the axial direction and in the circumferential direction irregularly extending, relatively large radial height. The stabilizer chamber 15 is connected via two openings with the flow channel. Upstream of the compressor wheel, a radial inlet gap 12 is arranged, which by a housing part in the intake, for example a Housing part of a muffler 40 or intake manifold, and a surrounding the flow channel 14 in the intake of the compressor wheel housing part is limited. Downstream of the leading edge of the blades 31 of the compressor wheel 30 and in the overlap region to the inlet a radial stabilizer gap 1 1 is arranged. The annular web 102 arranged between the circumferential columns forms the flow channel wall in the intake region of the compressor wheel 14 and is connected to the inner compressor housing via a plurality of radially outwardly directed holding ribs 103.
Optional können Schwingungsreduzierende Massnahmen verwirklicht sein. So können die Halterippen optional um ihre Achse verdreht ausgebildet sein. Die Halterippen können optional gegen die radiale Richtung schräg gestellt sein. Dabei können die Halterippen unterschiedliche Abweichungen zur radialen Richtung aufweisen. Insbesondere können die Halterippen auch gegenläufig schief gestellt angeordnet sein. Durch die in Fig. 2 und Fig. 3 angedeutete Schiefstellung der Halterippen 103 gegen die radiale Richtung, kann das Schwingungsverhalten gezielt beeinflusst werden. Die Halterippen können optional mit einem runden, konischen oder elliptischen Profil oder mit einem Strömungsprofil ausgestattet sein. Die insgesamt sehr weiche Struktur des integrierten inneren Verdichtergehäuses hat eine positive Auswirkung auf das Verhalten im Berstfall des Verdichterrades. Die langen Gehäuseteile lassen sich gut deformieren und absorbieren einen grossen Teil der im Verdichterrad gespeicherten Energie. Optionally, vibration-reducing measures can be implemented. Thus, the retaining ribs can optionally be formed rotated about its axis. The holding ribs can optionally be inclined against the radial direction. The retaining ribs may have different deviations from the radial direction. In particular, the holding ribs can also be arranged skewed in opposite directions. By the inclined position of the holding ribs 103, as indicated in FIG. 2 and FIG. 3, against the radial direction, the oscillation behavior can be influenced in a targeted manner. The holding ribs can optionally be equipped with a round, conical or elliptical profile or with a flow profile. The overall very soft structure of the integrated inner compressor housing has a positive effect on the behavior in the event of bursting of the compressor wheel. The long housing parts can be easily deformed and absorb a large part of the energy stored in the compressor wheel.
Sollte es im Berstfall dennoch im Verbindungsbereich zwischen den Halterippen 103 und dem Ringsteg 102 aufgrund der hohen Beanspruchung zu einem Bruch kommen, so dass der Ringsteg im Extremfall komplett von den Halterippen losgerissen wird, gelangt das erfindungsgemäss am Ringsteg angeordnete Rückhalteelement 105 zum Einsatz. Das Rückhalteelement 105 ist in der Ausführungsform nach Fig. 1 ein umlaufender, ringförmiger radialer Vorsprung mit einem rechteckigen Querschnitt. Das Rückhaltelement ist integral mit dem Ringsteg ausgebildet. Optional kann der Vorsprung ein fluiddynamisch optimierter Querschnitt aufweisen und in die Kontur des Ringstegs integriert sein. Das Rückhalteelement 105 kann gemäss der Darstellung bereits bei der Herstellung integral mit dem Ringsteg gegossen werden oder (nicht dargestellt) nachträglich form-, kraft- oder materialschlüssig am Ringsteg befestigt werden beispielsweise durch Aufschrumpfen, Anschrauben, Anschweissen oder Angiessen. Im Falle eines Brechens der Verbindungsstellen zwischen den Halterippen 103 und dem Ringsteg 102 verhindert das Rückhaltelement 105 durch Anstehen an den Halterippen eine Verschiebung des Ringstegs 102 in axialer Richtung an den Halterippen vorbei. If, in the event of a burst, breakage still occurs in the connecting region between the retaining ribs 103 and the annular rib 102, so that the annular rib is completely torn off the retaining ribs in an extreme case, the retaining element 105 arranged according to the invention on the annular rib is used. The retaining element 105 is in the embodiment of FIG. 1, a circumferential, annular radial projection with a rectangular cross-section. The retaining element is formed integrally with the annular web. Optionally, the projection may have a fluid-dynamic optimized cross-section and be integrated into the contour of the annular web. The retaining element 105 can, according to the illustration, be cast integrally with the annular web during production or (not shown) can subsequently be attached to the annular web in a form-fitting, force-fitting or material-locking manner, for example by shrinking, screwing, welding or casting. In the event of breakage of the connection points between the retaining ribs 103 and the annular web 102, the retaining element 105 prevents the retaining ribs 102 from slipping off the retaining ribs in the axial direction by coming into contact with the retaining ribs.
Fig. 2 zeigt eine Ansicht auf ein Verdichtergehäuse mit einer ersten, beispielhaften Ausführungsform des erfindungsgemässen Rückhalteelements. In diesem Fall ist das Rückhalteelement 105 wie oben beschrieben als ein ringförmiger, nach aussen gerichteter, radialer Vorsprung ausgebildet. 2 shows a view of a compressor housing with a first, exemplary embodiment of the retaining element according to the invention. In this case, the retaining member 105 is formed as described above as an annular, outwardly directed, radial projection.
Demgegenüber ist in der zweiten, beispielhaften Ausführungsform des erfindungsgemässen Rückhalteelements nach Fig. 3 der Ring in mehrere Ringsegmentstücke unterteilt, welche voneinander beabstandet angeordnet sind. Die Ringsegmentstücke sind derart verteilt, dass jeweils im Bereich eines Haltesteg ein Rückhalteelement 105' angeordnet ist. In contrast, in the second, exemplary embodiment of the retaining element according to the invention according to FIG. 3, the ring is subdivided into a plurality of ring segment pieces which are arranged at a distance from one another. The ring segment pieces are distributed such that in each case in the region of a retaining web, a retaining element 105 'is arranged.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
Inneres Verdichtergehäuse Einsatzwand als Bestandteil des inneren Verdichtergehäuses Ringsteg Halterippen Rückhalteelement(e) Stabilisatorspalt Eintrittsspalt Strömungskanal im Ansaugbereich des Verdichters Stabil isatorraum Äusseres Verdichtergehäuse Diffusor mit Leitvorrichtung Verdichterrad Laufschaufeln des Verdichterrades Schalldämpfer Befestigungsmittel zur Befestigung des Schalldämpfers amInner compressor housing Insert wall as part of the inner compressor housing Ring web Retaining ribs Retaining element (s) Stabilizer gap Entrance gap Flow channel in the intake area of the compressor Stable isator space Outer compressor housing Diffuser with guide device Compressor wheel Blades of the compressor wheel Muffler Fastening means for attaching the muffler to the compressor
Verdichtergehäuse compressor housing

Claims

Patentansprüche claims
1 . Verdichtergehäuse eines Radialverdichters, mit einem ringförmigen Stabilisatorraum (15) welcher einen Strömungskanal (14) im Ansaugbereich des Verdichterrades umgibt und durch einen Ringsteg (102) gegenüber dem Strömungskanal abgedeckt ist, wobei der Stabilisatorraum (15) über einen Eintrittsspalt (12) stromaufwärts des Verdichterradeintritts sowie einen Stabilisatorspalt (1 1 ) stromabwärts des Verdichterradeintritts mit dem Strömungskanal (14) in Verbindung steht, und wobei der Ringsteg (102) über mehrere radiale Halterippen (103) mit dem Verdichtergehäuse (10) verbunden ist, dadurch gekennzeichnet, dass am Ringsteg (102) zwischen den Halterippen und dem Stabilisatorspalt mindestens ein radial vorstehendes Rückhalteelement (105, 105') vorgesehen ist, welches im Falle eines Brechens der Verbindungsstellen zwischen den Halterippen (103) und dem Ringsteg (102) durch Anstehen an den Halterippen eine Verschiebung des Ringstegs in axialer Richtung an den Halterippen vorbei verhindert. 1 . Compressor housing of a centrifugal compressor, with an annular stabilizer space (15) surrounding a flow channel (14) in the intake of the compressor and is covered by a ring land (102) opposite the flow channel, wherein the stabilizer space (15) via an inlet gap (12) upstream of the Verdichterradeintritts and a stabilizer gap (1 1) downstream of the compressor impeller inlet with the flow channel (14) is in communication, and wherein the annular web (102) via a plurality of radial retaining ribs (103) with the compressor housing (10) is connected, characterized in that at the annular web ( 102) between the holding ribs and the stabilizer gap at least one radially projecting retaining element (105, 105 ' ) is provided, which in case of breakage of the connecting points between the retaining ribs (103) and the annular web (102) by queuing on the retaining ribs a displacement of the annular web in the axial direction past the retaining ribs ve rhindert.
2. Verdichtergehäuse nach Anspruch 1 , wobei das Rückhalteelement (105) als ein umlaufender Ring ausgebildet ist. 2. Compressor housing according to claim 1, wherein the retaining element (105) is formed as a circumferential ring.
3. Verdichtergehäuse nach Anspruch 1 , wobei mehrere Rückhaltelemente (105') als Segmente eines umlaufenden Rings ausgebildet sind. 3. compressor housing according to claim 1, wherein a plurality of retaining elements (105 ') are formed as segments of a circumferential ring.
4. Verdichtergehäuse nach Anspruch 3, wobei die mehreren Rückhalteelemente (105') voneinander beabstandet angeordnet sind. 4. The compressor housing according to claim 3, wherein the plurality of retaining elements (105 ' ) are arranged spaced from each other.
5. Verdichtergehäuse nach Anspruch 3 oder 4, wobei die mehreren Rückhalteelemente (105') jeweils im Bereich der Verbindungsstellen zwischen den Halterippen (103) und dem Ringsteg (102) angeordnet sind. 5. Compressor housing according to claim 3 or 4, wherein the plurality of retaining elements (105 ' ) respectively in the region of the connection points between the retaining ribs (103) and the annular web (102) are arranged.
6. Verdichtergehäuse nach einem der vorangehenden Ansprüche, wobei der mindestens eine Rückhaltevorsprung (105, 105') integrales Bestandteil des6. compressor housing according to one of the preceding claims, wherein the at least one retaining projection (105, 105 ' ) integral part of
Ringstegs ist. Ringstegs is.
7. Verdichtergehäuse nach einem der vorangehenden Ansprüche, wobei der mindestens eine Rückhaltevorsprung (105, 105') fluiddynamisch optimiert in die Kontur des Ringstegs integriert ist. 7. compressor housing according to one of the preceding claims, wherein the at least one retaining projection (105, 105 ' ) is optimized fluid dynamic integrated into the contour of the annular web.
8. Verdichtergehäuse nach einem der Ansprüche 1 bis 5, wobei der mindestens eine Rückhaltevorsprung form-, kraft-, oder materialschlüssig am Ringsteg befestigt ist. 8. compressor housing according to one of claims 1 to 5, wherein the at least one retaining projection is positively, force, or materially secured to the annular web.
9. Radialverdichter, umfassen ein Verdichtergehäuse nach einem der Ansprüche 1 bis 8. 9. Radial compressor, comprising a compressor housing according to one of claims 1 to 8.
10. Abgasturbolader, umfassend einen Radialverdichter mit einem Verdichtergehäuse nach einem der Ansprüche 1 bis 8. 10. Exhaust gas turbocharger comprising a radial compressor with a compressor housing according to one of claims 1 to 8.
PCT/EP2015/056926 2014-05-08 2015-03-30 Compressor housing WO2015169509A1 (en)

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DE102014106415.1A DE102014106415A1 (en) 2014-05-08 2014-05-08 compressor housing

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DE102017109594A1 (en) * 2017-05-04 2018-11-08 Abb Turbo Systems Ag Compressor housing of a centrifugal compressor
DE102018110557A1 (en) * 2018-05-03 2019-11-07 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Compressor inlet with adjustable inlet geometry
DE102020117944A1 (en) 2020-07-07 2022-01-13 Deutsches Zentrum für Luft- und Raumfahrt e.V. Impeller assembly, pump, rocket engine and method of making an impeller assembly

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EP1586745A1 (en) * 2004-04-13 2005-10-19 ABB Turbo Systems AG Compressor casing
EP1719879A1 (en) * 2005-05-03 2006-11-08 ABB Turbo Systems AG Burst protection device for radial compressors
WO2008023070A1 (en) * 2006-08-24 2008-02-28 Abb Turbo Systems Ag Compressor housing
WO2012085065A1 (en) * 2010-12-23 2012-06-28 Abb Turbo Systems Ag Burst protection in the compressor housing of an exhaust gas turbocharger

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DE10107807C1 (en) * 2001-02-20 2002-07-25 Man B & W Diesel Ag Flow machine with radial compressor wheel, used as a turbosupercharger, has cavity between inner cylinder of spiral casing and casing insertion piece

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EP1586745A1 (en) * 2004-04-13 2005-10-19 ABB Turbo Systems AG Compressor casing
EP1719879A1 (en) * 2005-05-03 2006-11-08 ABB Turbo Systems AG Burst protection device for radial compressors
WO2008023070A1 (en) * 2006-08-24 2008-02-28 Abb Turbo Systems Ag Compressor housing
WO2012085065A1 (en) * 2010-12-23 2012-06-28 Abb Turbo Systems Ag Burst protection in the compressor housing of an exhaust gas turbocharger

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