EP1719879B1 - Burst protection device for radial compressors - Google Patents

Burst protection device for radial compressors Download PDF

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Publication number
EP1719879B1
EP1719879B1 EP05405332A EP05405332A EP1719879B1 EP 1719879 B1 EP1719879 B1 EP 1719879B1 EP 05405332 A EP05405332 A EP 05405332A EP 05405332 A EP05405332 A EP 05405332A EP 1719879 B1 EP1719879 B1 EP 1719879B1
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EP
European Patent Office
Prior art keywords
wall
retaining
compressor
protection device
burst protection
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.)
Expired - Fee Related
Application number
EP05405332A
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German (de)
French (fr)
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EP1719879A1 (en
Inventor
Klaus Heinrich
Detlef Behrendt
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.)
Accelleron Industries AG
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
Priority to EP05405332A priority Critical patent/EP1719879B1/en
Priority to DE502005002724T priority patent/DE502005002724D1/en
Priority to JP2006120710A priority patent/JP2006312934A/en
Priority to KR1020060039078A priority patent/KR20060115338A/en
Priority to CN2006100778475A priority patent/CN1858408B/en
Publication of EP1719879A1 publication Critical patent/EP1719879A1/en
Application granted granted Critical
Publication of EP1719879B1 publication Critical patent/EP1719879B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/16—Other safety measures for, or other control of, 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
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
    • F01D21/045—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position special arrangements in stators or in rotors dealing with breaking-off of part of rotor
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • 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
    • 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 a burst protection device for the centrifugal compressor of an exhaust gas turbocharger, as described by the features of the preamble of claim 1 and a centrifugal compressor and an exhaust gas turbocharger with such a burst protection device.
  • WO 02/090722 A1 describes a burst protection device for a radial compressor of a turbocharger, in which the compressor wheel is surrounded by housing parts which are able to absorb the energy stored in the compressor wheel. Preventing debris exiting the compressor housing is referred to as containment.
  • the housing parts surrounding the compressor wheel in particular the insert wall of the compressor bounding the flow duct, are divided into at least two parts. A radial part in the region of the flow deflection from the axial to the radial and an axial ring, which encloses the inlet region upstream of the compressor wheel. A large part of the energy is dissipated via forces acting radially on the insert wall.
  • the object of the invention is therefore to provide a burst protection device for a centrifugal compressor of an exhaust gas turbocharger, with which the axial displacement of the compressor housing parts can be limited even without precise knowledge of the forces acting in a given space.
  • the goal is achieved by two or more retention measures successively, ie temporally and spatially separated from each other to effect.
  • the energy is gradually reduced and at the same time prevents the forces acting on an uncontrollably high level.
  • the sliding insert wall remains sufficient space for the axial displacement after the engagement of the first retaining element and before a second retaining element is engaged. This is inside the compressor housing enough space is available to reduce the kinetic energy of the cracked compressor wheel.
  • third or further retaining elements can be brought into engagement.
  • Fig. 1 shows a section through the compressor of an exhaust gas turbocharger.
  • the flow path of the air to be compressed is indicated in the figures by arrows.
  • the terms upstream and downstream refer to this flow.
  • Dashed lines indicated on the axis of rotation A arranged the compressor 60, which is surrounded by different housing parts.
  • the terms radial, axial and coaxial refer to the axis of rotation A.
  • the insert wall 10 Immediately radially outside of the leading and through the compressor wheel flow channel 40, the insert wall 10 is arranged.
  • the insert wall 10 delimits the flow channel radially outwards and, depending on the type of attachment of the insert wall to the outer housing parts, from upstream of the compressor wheel 0bis beyond the compressor in the region of the diffuser, which is arranged downstream of the compressor wheel.
  • an outer compressor housing wall 20 Radially outside the insert wall, an outer compressor housing wall 20 is arranged, via which, for example, a Filter muffler 50 or an intake for the supply of air to be compressed is attached to the compressor housing.
  • the outer wall 20 is connected to the insert wall 10 in the region of the diffuser, directly or via further housing parts.
  • the burst protection device In the case of bursting of the compressor wheel 60, the burst protection device according to the invention is intended to brake the insert wall separated in the region of the compressor wheel in the axial direction and thus prevent it from leaving the compressor housing at the axial exit.
  • a radially outwardly projecting, coaxially arranged retaining projection 11 is provided on the insert wall, which is to cooperate in the case of bursting of the compressor wheel with brake elements.
  • These brake elements are formed as formed with a central opening, annular retaining elements 31 and 21.
  • a first retaining element 31 is fastened to an intermediate wall 30 arranged between the insert wall 10 and the outer wall 20.
  • the first retaining element 31 is in direct contact with the retaining projection of the insert wall, so that in the case of bursting of the compressor wheel, the insert wall is braked directly in its axial movement for a first time.
  • Retaining projection and retaining element can be connected to each other with a collar or successive wedge surfaces or even via a screw.
  • the first braking stage of the burst protection device only after the insert wall has already moved in the axial direction.
  • This embodiment has the advantage that a first impact on the insert wall, which usually leads to the above-described breakage of the insert wall, does not directly affect the braking device and approximately directly damages the first retaining element 31.
  • a second retaining element 21 is offset relative to the first retaining element 31 in the axial direction. It comprises a coaxially arranged circumferential ring with a central opening.
  • the circumferential ring is the radially inner boundary of a support wall 22 which is fixed to the outer wall 20.
  • the support wall may be formed corrugated for additional reinforcement, as indicated in Fig. 1.
  • the relative dimensions of retaining projection 11 and retaining element 21 and 31 can be explained with reference to the schematic representation in FIG. 2.
  • the retaining projection has a maximum outer radius R 11 .
  • the maximum Outer radius R 11 denotes the largest radius of the coaxially arranged retaining projection. If the retaining projection is provided with a wedge surface as indicated in the figure, the maximum outer radius R 11 is the radius of the outermost wedge tip.
  • the retaining elements 21 and 31 have a minimum inner radius R 21 and R 31 .
  • the minimum inner radius denotes the smallest radius of the openings in the retaining elements. If the openings of the retaining elements are provided with a wedge surface as indicated in the figure, the minimum inner radius is the radius of the innermost wedge tip or the narrowest point of the coaxially arranged opening.
  • the maximum outer radius R 11 must be greater than the minimum inner radii R 21 and R 31 Only this ensures that the retaining projection can brake the insert wall on the way in the axial direction by engaging in the retaining elements.
  • the opening radius of the second retaining element 21, that is to say the minimum inner radius R 21 is smaller than the opening radius of the first retaining element 31, that is to say the minimum inner radius R 31 .
  • the retaining projection 11 is basically formed as a cylindrical, circumferential ring.
  • the retaining projection can also be divided along the circumference into two or more sections, so that in the case of bursting of the compressor wheel, the forces acting on the retaining projection and the stresses caused thereby can not spread over the entire circumference.
  • third or further retaining elements may be provided, which are arranged either in the region between the first and second retaining element or farther upstream of the second retaining element.

Description

Technisches GebietTechnical area

Die Erfindung betrifft eine Berstschutzvorrichtung für den Radialverdichter eines Abgasturboladers, wie sie durch die Merkmale des Oberbegriffes des Anspruchs 1 beschrieben ist sowie einen Radialverdichter und einen Abgasturbolader mit einer solchen Berstschutzvorrichtung.The invention relates to a burst protection device for the centrifugal compressor of an exhaust gas turbocharger, as described by the features of the preamble of claim 1 and a centrifugal compressor and an exhaust gas turbocharger with such a burst protection device.

Stand der TechnikState of the art

In Abgasturboladern werden Radialverdichter eingesetzt, die mit hoher Umfangsgeschwindigkeit rotieren. Im Bauteil ist dadurch eine hohe kinetische Energie gespeichert. Mit den zunehmenden Anforderungen an Abgasturbolader hinsichtlich der Druckverhältnisse, ist auch die Gefahr des Berstens des Verdichterrades infolge immenser Fliehkräfte gestiegen. Damit weder Personen noch Sachwerte gefährdet werden, wird gefordert, dass im Fall des Berstens des Verdichterrades keine Trümmer mit ihrer grossen kinetischen Energie durch die das Rad umschliessenden Gehäuse nach aussen gelangen.In exhaust gas turbochargers radial compressors are used, which rotate at high peripheral speed. The component thus stores a high kinetic energy. With the increasing demands on exhaust gas turbochargers in terms of pressure conditions, the risk of bursting of the compressor wheel has increased due to immense centrifugal forces. In order not to endanger persons or property, it is demanded that, in the event of bursting of the compressor wheel, no debris with its high kinetic energy escape through the housing surrounding the wheel.

WO 02/090722 A1 beschreibt eine Berstschutzvorrichtung für einen Radialverdichter eines Turboladers, bei der das Verdichterrad von Gehäuseteilen umgeben ist, die in der Lage sind, die im Verdichterrad gespeicherte Energie aufzunehmen. Das Verhindern von aus dem Verdichtergehäuse austretenden Bruchstücken wird als ,Containment' bezeichnet. Beim Bersten des Verdichterrades werden die das Verdichterrad umschliessenden Gehäuseteile, insbesondere die den Strömungskanal begrenzende Einsatzwand des Verdichters, in mindestens zwei Teile zertrennt. Einen radialen Teil im Bereich der Strömungsumlenkung aus der axialen in die radiale sowie einen axialen Ring, welcher den Eintrittsbereich stromauf des Verdichterrades umschliesst. Ein grosser Teil der Energie wird über radial auf die Einsatzwand einwirkenden Kräfte abgebaut. Beim Bersten des Verdichterrades entstehen aber auch Axialkräfte. Diese können dazu führen, dass Teile des Verdichtergehäuses axial in Richtung Verdichtereintritt verschoben werden. Um eine unzulässige Verschiebung zu verhindern werden im allgemeinen axial wirkende Verschraubungen oder formschlüssige Elemente verwendet. Die aus WO 02/090722 bekannte Berstschutzvorrichtung weist Bremsen auf, die auf sich axial verschiebende Gehäuseteile wirken und abbremsen sollen. Dabei wird die Einsatzwand an einer Rippe einer Verdichtergehäuse-Zwischenwand oder gleichzeitig an mehreren Rippen gebremst. WO 02/090722 A1 describes a burst protection device for a radial compressor of a turbocharger, in which the compressor wheel is surrounded by housing parts which are able to absorb the energy stored in the compressor wheel. Preventing debris exiting the compressor housing is referred to as containment. When the compressor wheel bursts, the housing parts surrounding the compressor wheel, in particular the insert wall of the compressor bounding the flow duct, are divided into at least two parts. A radial part in the region of the flow deflection from the axial to the radial and an axial ring, which encloses the inlet region upstream of the compressor wheel. A large part of the energy is dissipated via forces acting radially on the insert wall. When bursting the compressor but also axial forces arise. These can cause parts of the compressor housing to be moved axially in the direction of the compressor inlet. In order to prevent an unacceptable shift generally axially acting fittings or positive-locking elements are used. From WO 02/090722 Known Berstschutzvorrichtung has brakes, which act on axially displaceable housing parts and should decelerate. In this case, the insert wall is braked on a rib of a compressor housing intermediate wall or at the same time on a plurality of ribs.

Da die im Schadensfall wirkenden Kräfte nicht genau bekannt sind, ist die richtige Dimensionierung der Bremselemente, die auf die Bauteile wirken und sie axial zurückhalten sollen, keine leichte Aufgabe. Sind die Elemente überdimensioniert, können zu hohe Kräfte entstehen, die nicht beherrscht werden können. Sind sie hingegen unterdimensioniert, dürfte die Rückhaltewirkung nicht ausreichen um das Austreten einzelner Verdichterradteile in axialer Richtung aus dem Gehäuse zu verhindern.Since the forces acting in the event of damage are not known exactly, the correct dimensioning of the brake elements, which act on the components and should restrain them axially, is not an easy task. If the elements are oversized, excessive forces can arise which can not be controlled. If, on the other hand, they are undersized, the retention effect would probably not be sufficient to prevent the escape of individual compressor wheel parts in the axial direction out of the housing.

Kurze Darstellung der ErfindungBrief description of the invention

Aufgabe der Erfindung ist es daher, eine Berstschutzvorrichtung für einen Radialverdichter eines Abgasturboladers zu schaffen, mit der die axiale Verschiebung von Verdichtergehäuseteilen auch ohne exakte Kenntnis der wirkenden Kräfte in einem vorgegebenen Bauraum begrenzt werden kann.The object of the invention is therefore to provide a burst protection device for a centrifugal compressor of an exhaust gas turbocharger, with which the axial displacement of the compressor housing parts can be limited even without precise knowledge of the forces acting in a given space.

Diese Aufgabe wird gelöst durch eine Berstschutzvorrichtung eines Radialverdichters eines Turboladers gemäss den Merkmalen des Anspruches 1.This object is achieved by a burst protection device of a centrifugal compressor of a turbocharger according to the features of claim 1.

Erfindungsgemäss wird das Ziel dadurch erreicht, dass zwei oder mehrere Rückhaltemassnahmen nacheinander, also zeitlich und räumlich getrennt voneinander zur Wirkung gelangen. Dadurch wird die Energie stufenweise abgebaut und gleichzeitig verhindert, dass die wirkenden Kräfte auf ein unkontrollierbar hohes Niveau ansteigen.According to the invention, the goal is achieved by two or more retention measures successively, ie temporally and spatially separated from each other to effect. As a result, the energy is gradually reduced and at the same time prevents the forces acting on an uncontrollably high level.

Sollte ein erstes Rückhalteelement überwunden werden, so verschiebt sich der von der restlichen Einsatzwand getrennte, axiale Ring in axialer Richtung weg von der Turbinenwelle, bis ein zweites Rückhalteelement in Eingriff kommt.Should a first retaining element be overcome, the axial ring separated from the rest of the insert wall shifts away from the turbine shaft in the axial direction until a second retaining element engages.

Der sich verschiebenden Einsatzwand bleibt nach dem Eingreifen des ersten Rückhalteelements und bevor ein zweites Rückhalteelement zum Eingriff kommt für die axiale Verschiebung ausreichend Platz. Damit ist innerhalb des Verdichtergehäuses genügend Platz vorhanden, um die kinetische Energie des geborstenen Verdichterrades abzubauen.The sliding insert wall remains sufficient space for the axial displacement after the engagement of the first retaining element and before a second retaining element is engaged. This is inside the compressor housing enough space is available to reduce the kinetic energy of the cracked compressor wheel.

Bei Bedarf können dritte oder weitere Rückhalteelemente in Eingriff gebracht werden.If necessary, third or further retaining elements can be brought into engagement.

Ein erfindungsgemässer Turbolader mit einem Radialverdichter, der eine oben beschriebene erfindungsgemässe Berstschutzvorrichtung aufweist, stellt im Falle eines Verdichterradberstens eine geringere Gefahr für sich beim Turbolader aufhaltende Menschen und benachbarte Anlagen dar.A turbocharger according to the invention with a centrifugal compressor having a bursting protection device according to the invention described above, in the case of a compressor wheel rupture, represents a lesser risk for people and adjacent systems staying at the turbocharger.

Weitere Vorteile ergeben sich aus den abhängigen Ansprüchen.Further advantages emerge from the dependent claims.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Nachfolgend wird die erfindungsgemässe Berstschutzvorrichtung anhand von Figuren genauer erläutert. Hierbei zeigt

Fig. 1
einen Schnitt durch das Verdichtergehäuse eines Abgasturboladers mit einer erfindungsgemässen Berstschutzvorrichtung, und
Fig. 2
eine schematische, vergrösserte Darstellung der Rückhaltevorrichtung der erfindungsgemässen Berstschutzvorrichtung nach Fig. 1.
Hereinafter, the inventive anti-burst device will be explained in more detail with reference to figures. This shows
Fig. 1
a section through the compressor housing of an exhaust gas turbocharger with an inventive Berstschutzvorrichtung, and
Fig. 2
a schematic, enlarged view of the retaining device of the bursting protection device according to the invention according to FIG. 1.

Weg zur Ausführung der ErfindungWay to carry out the invention

Fig. 1 zeigt einen Schnitt durch den Verdichter eines Abgasturboladers. Der Strömungsverlauf der zu verdichtenden Luft ist in den Figuren mit Pfeilen angedeutet. Die Bezeichnungen stromaufwärts und stromabwärts beziehen sich auf diesen Strömungsverlauf. Gestrichelt angedeutet ist auf der Drehachse A angeordnet das Verdichterrad 60, welches von verschiedenen Gehäuseteilen umgeben ist. Die Bezeichnungen radial, axial und koaxial beziehen sich auf die Drehachse A.Fig. 1 shows a section through the compressor of an exhaust gas turbocharger. The flow path of the air to be compressed is indicated in the figures by arrows. The terms upstream and downstream refer to this flow. Dashed lines indicated on the axis of rotation A arranged the compressor 60, which is surrounded by different housing parts. The terms radial, axial and coaxial refer to the axis of rotation A.

Unmittelbar radial ausserhalb des auf und durch das Verdichterrad führenden Strömungskanals 40 ist die Einsatzwand 10 angeordnet. Die Einsatzwand 10 begrenzt den Strömungskanal radial aussen und führt, je nach Art der Befestigung der Einsatzwand an den äusseren Gehäuseteilen, von stromauf des Verdichterrades 0bis über das Verdichterrad hinaus in den Bereich des Diffusors, welcher stromabwärts des Verdichterrades angeordnet ist. Radial ausserhalb der Einsatzwand ist eine äussere Verdichtergehäusewand 20 angeordnet, über welche beispielsweise ein Filterschalldämpfer 50 oder ein Ansaugstutzen für die Zuführung der zu verdichtenden Luft am Verdichtergehäuse befestigt ist. Die Aussenwand 20 ist im Bereich des Diffusors, direkt oder über weitere Gehäuseteile, mit der Einsatzwand 10 verbunden.Immediately radially outside of the leading and through the compressor wheel flow channel 40, the insert wall 10 is arranged. The insert wall 10 delimits the flow channel radially outwards and, depending on the type of attachment of the insert wall to the outer housing parts, from upstream of the compressor wheel 0bis beyond the compressor in the region of the diffuser, which is arranged downstream of the compressor wheel. Radially outside the insert wall, an outer compressor housing wall 20 is arranged, via which, for example, a Filter muffler 50 or an intake for the supply of air to be compressed is attached to the compressor housing. The outer wall 20 is connected to the insert wall 10 in the region of the diffuser, directly or via further housing parts.

Die erfindungsgemässe Berstschutzvorrichtung soll im Fall des Berstens des Verdichterrades 60 die im Bereich des Verdichterrades abgetrennte Einsatzwand in axialer Richtung abbremsen und so am axialen Austritt aus dem Verdichtergehäuse hindern. Hierfür ist an der Einsatzwand ein radial nach aussen abstehender, koaxial angeordneter Rückhaltevorsprung 11 vorgesehen, welcher Im Fall des Berstens des Verdichterrades mit Bremselementen zusammenwirken soll. Diese Bremselemente sind als mit einer zentralen Öffnung ausgebildete, ringförmige Rückhalteelemente 31 und 21 ausgebildet. Ein erstes Rückhalteelement 31 ist an einem zwischen der Einsatzwand 10 und der Aussenwand 20 angeordneten Zwischenwand 30 befestigt. Das erste Rückhalteelement 31 ist in der Ausführungsform gemäss Fig. 1 in direktem Kontakt mit dem Rückhaltevorsprung der Einsatzwand, so dass im Fall des Berstens des Verdichterrades die Einsatzwand unmittelbar ein erstes mal in ihrer axialen Bewegung gebremst wird. Rückhaltevorsprung und Rückhalteelement können mit einem Bund oder aufeinander auflaufenden Keilflächen oder gar über eine Verschraubung miteinander verbunden sein. Alternativ kann zwischen dem Rückhaltevorsprung und dem ersten Rückhalteelement 31 auch ein geringfügiger axialer Abstand bestehen. In diesem Fall greift die erste Bremsstufe der Berstschutzvorrichtung erst nachdem sich die Einsatzwand bereits in die axiale Richtung verschoben hat. Diese Ausführungsform hat den Vorteil, dass ein erster Schlag auf die Einsatzwand, welcher in der Regel zum oben beschriebenen Bruch der Einsatzwand führt, sich nicht direkt auf die Bremsvorrichtung auswirkt und etwa direkt das erste Rückhalteelement 31 beschädigt.In the case of bursting of the compressor wheel 60, the burst protection device according to the invention is intended to brake the insert wall separated in the region of the compressor wheel in the axial direction and thus prevent it from leaving the compressor housing at the axial exit. For this purpose, a radially outwardly projecting, coaxially arranged retaining projection 11 is provided on the insert wall, which is to cooperate in the case of bursting of the compressor wheel with brake elements. These brake elements are formed as formed with a central opening, annular retaining elements 31 and 21. A first retaining element 31 is fastened to an intermediate wall 30 arranged between the insert wall 10 and the outer wall 20. In the embodiment according to FIG. 1, the first retaining element 31 is in direct contact with the retaining projection of the insert wall, so that in the case of bursting of the compressor wheel, the insert wall is braked directly in its axial movement for a first time. Retaining projection and retaining element can be connected to each other with a collar or successive wedge surfaces or even via a screw. Alternatively, there may be a slight axial clearance between the retaining projection and the first retaining element 31. In this case, the first braking stage of the burst protection device only after the insert wall has already moved in the axial direction. This embodiment has the advantage that a first impact on the insert wall, which usually leads to the above-described breakage of the insert wall, does not directly affect the braking device and approximately directly damages the first retaining element 31.

Ein zweites Rückhalteelement 21 ist gegenüber dem ersten Rückhalteelement 31 in axialer Richtung versetzt angeordnet. Es umfasst einen koaxial angeordneten umlaufenden Ring mit einer zentralen Öffnung. Der umlaufende Ring ist die radial innere Begrenzung einer Stützwand 22, welche an der Aussenwand 20 befestigt ist. Die Stützwand kann zur zusätzlichen Versteifung gewellt ausgebildet sein, wie dies in Fig. 1 angedeutet ist.A second retaining element 21 is offset relative to the first retaining element 31 in the axial direction. It comprises a coaxially arranged circumferential ring with a central opening. The circumferential ring is the radially inner boundary of a support wall 22 which is fixed to the outer wall 20. The support wall may be formed corrugated for additional reinforcement, as indicated in Fig. 1.

Die relativen Abmessungen von Rückhaltevorsprung 11 und Rückhalteelement 21 und 31 lassen sich anhand der schematischen Darstellung in Fig. 2 erläutern. Der Rückhaltevorsprung hat einen maximalen Aussenradius R11. Der maximale Aussenradius R11 bezeichnet den grössten Radius des koaxial angeordneten Rückhaltevorsprungs. Ist der Rückhaltevorsprung wie in der Figur angedeutet mit einer Keilfläche versehen, ist der maximale Aussenradius R11 der Radius der äussersten Keilspitze. Die Rückhalteelemente 21 bzw. 31 haben einen minimalen Innenradius R21 bzw. R31. Der minimale Innenradius bezeichnet jeweils den kleinsten Radius der Öffnungen in den Rückhalteelementen. Sind die Öffnungen der Rückhalteelemente wie in der Figur angedeutet mit einer Keilfläche versehen, ist der minimale Innenradius der Radius der innersten Keilspitze bzw. die engste Stelle der koaxial angeordneten Öffnung.The relative dimensions of retaining projection 11 and retaining element 21 and 31 can be explained with reference to the schematic representation in FIG. 2. The retaining projection has a maximum outer radius R 11 . The maximum Outer radius R 11 denotes the largest radius of the coaxially arranged retaining projection. If the retaining projection is provided with a wedge surface as indicated in the figure, the maximum outer radius R 11 is the radius of the outermost wedge tip. The retaining elements 21 and 31 have a minimum inner radius R 21 and R 31 . The minimum inner radius denotes the smallest radius of the openings in the retaining elements. If the openings of the retaining elements are provided with a wedge surface as indicated in the figure, the minimum inner radius is the radius of the innermost wedge tip or the narrowest point of the coaxially arranged opening.

Damit der Rückhaltevorsprung mit den Rückhalteelementen zusammenwirken kann, muss der maximale Aussenradius R11 grösser sein als die minimalen Innenradien R21 und R31 Nur so ist gewährleistet, dass der Rückhaltevorsprung die Einsatzwand auf dem Weg in axialer Richtung durch eingreifen in die Rückhalteelemente bremsen kann. Vorteilhafterweise ist der Öffnungsradius des zweiten Rückhalteelements 21, also der minimale Innenradius R21, kleiner als der Öffnungsradius des ersten Rückhalteelements 31, also der minimale Innenradius R31. Sollte der Rückhaltevorsprung 11 an der stärksten Stelle beim Durchschlagen des ersten Rückhalteelements 31 auf die Abmessungen der Öffnung des ersten Rückhaltelements 31, den minimalen Innenradius R31, reduzierte worden sein, so würde das zweite Rückhalteelement dank dem kleineren Öffnungsradius dem Rückhaltevorsprung 11 dennoch entgegenstehen und somit seine Bremswirkung entfalten können.So that the retaining projection can interact with the retaining elements, the maximum outer radius R 11 must be greater than the minimum inner radii R 21 and R 31 Only this ensures that the retaining projection can brake the insert wall on the way in the axial direction by engaging in the retaining elements. Advantageously, the opening radius of the second retaining element 21, that is to say the minimum inner radius R 21 , is smaller than the opening radius of the first retaining element 31, that is to say the minimum inner radius R 31 . Should the retaining projection 11 be reduced to the dimensions of the opening of the first retaining element 31, the minimum inner radius R 31 , at the strongest point in the penetration of the first retaining element 31 , the second retaining element would still oppose the retaining projection 11 due to the smaller opening radius and thus can develop its braking effect.

Der Rückhaltevorsprung 11 ist grundsätzlich als zylinderförmiger, umlaufender Ring ausgebildet. Alternativ kann der Rückhaltevorsprung auch entlang des Umfangs in zwei oder mehrere Abschnitte unterteilt sein, so dass sich im Fall des Berstens des Verdichterrades die auf den Rückhaltvorsprung wirkenden Kräfte und die dadurch verursachten Spannungen nicht über den gesamten Umfang ausbreiten können.The retaining projection 11 is basically formed as a cylindrical, circumferential ring. Alternatively, the retaining projection can also be divided along the circumference into two or more sections, so that in the case of bursting of the compressor wheel, the forces acting on the retaining projection and the stresses caused thereby can not spread over the entire circumference.

Bei Bedarf können dritte oder weitere Rückhalteelemente vorgesehen sein, welche entweder in dem Bereich zwischen dem ersten und zweiten Rückhalteelement oder weiter stromaufwärts des zweiten Rückhalteelements angeordnet sind.If desired, third or further retaining elements may be provided, which are arranged either in the region between the first and second retaining element or farther upstream of the second retaining element.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Einsatzwandinsert wall
1111
RückhaltevorsprungRetaining projection
2020
Verdichtergehäuse-AussenwandCompressor housing outer wall
2121
RückhalteelementRetaining element
2222
Stützwandretaining wall
3030
Verdichtergehäuse-ZwischenwandCompressor housing intermediate wall
3131
RückhalteelementRetaining element
4040
Strömungskanalflow channel
5050
Ansauggehäusesuction
6060
Verdichterradcompressor
AA
Drehachse des VerdichterradesRotary axis of the compressor wheel
R11 R 11
maximaler Aussenradius des Rückhaltevorsprungsmaximum outer radius of the retaining projection
R21, R31 R 21 , R 31
minimaler Innenradius der Rückhalteelementesminimum inner radius of the retaining element

Claims (8)

  1. Burst protection device of a radial compressor of a turbocharger, having a compressor-housing insert wall (1) which defines a flow passage (40) radially on the outside above the moving blades of the compressor wheel, and having a compressor-housing outer wall (20) which surrounds the insert wall (10) radially on the outside, wherein
    a retaining projection (11) projecting radially outwards is arranged on the insert wall (10), and at least two retaining elements (21, 31) offset in the axial direction and intended for retaining the retaining projection (11) of the insert wall during an axial displacement of the insert wall (10) are arranged between the insert wall and the outer wall,
    wherein
    the two retaining elements (21, 31) define annular openings and are arranged separately from one another in such a way that they successively interact with the retaining projection (11) of the insert wall during an axial displacement of the insert wall (10), wherein
    the retaining projection (11) has a maximum outer radius (R11) which is larger than the two minimum inner radii (R21, R32) of the annular openings defined by the retaining elements,
    characterized in that the minimum inner radius of the opening of the retaining element (R21) arranged further upstream is smaller than the minimum inner radius of the opening of the other retaining element (R31).
  2. Burst protection device according to Claim 1, characterized in that the two retaining elements (21, 31) are fastened to the compressor housing separately from one another.
  3. Burst protection device according to Claim 2, characterized in that the two retaining elements (21, 31) are fastened to the compressor housing in the axial direction separately from one another.
  4. Burst protection device according to either of Claims 2 and 3, characterized in that a first retaining element (31) is part of an intermediate wall (22) arranged between the insert wall (10) and the outer wall (30) of the compressor housing.
  5. Burst protection device according to one of Claims 2 to 4, characterized in that a second retaining element (21) is fastened to the outer wall (20) of the compressor housing and is part of a supporting wall (22) directed radially inwards.
  6. Burst protection device according to Claim 5, characterized in that the supporting wall (22) is of corrugated design in the circumferential direction.
  7. Radial compressor, characterized by a burst protection device according to one of the preceding claims.
  8. Exhaust turbocharger, characterized by a radial compressor according to Claim 7.
EP05405332A 2005-05-03 2005-05-03 Burst protection device for radial compressors Expired - Fee Related EP1719879B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP05405332A EP1719879B1 (en) 2005-05-03 2005-05-03 Burst protection device for radial compressors
DE502005002724T DE502005002724D1 (en) 2005-05-03 2005-05-03 Burst protection device for centrifugal compressors
JP2006120710A JP2006312934A (en) 2005-05-03 2006-04-25 Breakage protection device for radial compressor
KR1020060039078A KR20060115338A (en) 2005-05-03 2006-04-29 Bursting protecting device for radial flow compressor
CN2006100778475A CN1858408B (en) 2005-05-03 2006-05-08 Burst protection device for radial compressors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05405332A EP1719879B1 (en) 2005-05-03 2005-05-03 Burst protection device for radial compressors

Publications (2)

Publication Number Publication Date
EP1719879A1 EP1719879A1 (en) 2006-11-08
EP1719879B1 true EP1719879B1 (en) 2008-01-30

Family

ID=35730393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05405332A Expired - Fee Related EP1719879B1 (en) 2005-05-03 2005-05-03 Burst protection device for radial compressors

Country Status (5)

Country Link
EP (1) EP1719879B1 (en)
JP (1) JP2006312934A (en)
KR (1) KR20060115338A (en)
CN (1) CN1858408B (en)
DE (1) DE502005002724D1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2914362B1 (en) * 2007-03-30 2012-07-27 Airbus France DEVICE FOR DETECTING AND RETAINING DEBRIS FROM AN AIRCRAFT ENGINE.
DE102007055615A1 (en) * 2007-11-20 2009-05-28 Mann + Hummel Gmbh Housing for a centrifugal compressor
EP2216516A1 (en) * 2009-02-04 2010-08-11 ABB Turbo Systems AG Burst protection device for radial compressor
DE102009035575A1 (en) * 2009-07-31 2011-03-03 Man Diesel & Turbo Se Radial compressor and method of manufacturing a radial compressor
US9546563B2 (en) 2012-04-05 2017-01-17 General Electric Company Axial turbine with containment shroud
DE102014106415A1 (en) * 2014-05-08 2015-11-12 Abb Turbo Systems Ag compressor housing
CN104454146A (en) * 2014-10-27 2015-03-25 中国北车集团大连机车研究所有限公司 Protection device for fracture of axial turbine of turbocharger
DE102015014550A1 (en) * 2015-11-11 2017-05-11 Man Diesel & Turbo Se Intake system for an exhaust gas turbocharger and turbocharger
DE102016111081A1 (en) * 2016-06-17 2017-12-21 Man Diesel & Turbo Se flow machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640654A1 (en) * 1996-10-02 1998-04-09 Asea Brown Boveri Burst protection device for radial turbines of turbochargers
DE10050931C5 (en) * 2000-10-13 2007-03-29 Man Diesel Se Turbomachine with radial impeller
TW576886B (en) * 2001-05-04 2004-02-21 Abb Turbo Systems Ag Turbocharger having a radial-flow compressor and burst-protection arrangement for a radial-flow compressor of a turbocharger
EP1586745B1 (en) * 2004-04-13 2015-07-29 ABB Turbo Systems AG Compressor casing

Also Published As

Publication number Publication date
CN1858408A (en) 2006-11-08
EP1719879A1 (en) 2006-11-08
JP2006312934A (en) 2006-11-16
KR20060115338A (en) 2006-11-08
DE502005002724D1 (en) 2008-03-20
CN1858408B (en) 2010-12-08

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