EP2006494A1 - Drive for a pre-twist guide device - Google Patents

Drive for a pre-twist guide device Download PDF

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Publication number
EP2006494A1
EP2006494A1 EP07110647A EP07110647A EP2006494A1 EP 2006494 A1 EP2006494 A1 EP 2006494A1 EP 07110647 A EP07110647 A EP 07110647A EP 07110647 A EP07110647 A EP 07110647A EP 2006494 A1 EP2006494 A1 EP 2006494A1
Authority
EP
European Patent Office
Prior art keywords
adjusting ring
drive
compressor
dip tube
drive according
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.)
Withdrawn
Application number
EP07110647A
Other languages
German (de)
French (fr)
Inventor
Josef Bättig
Matthias Richner
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 EP07110647A priority Critical patent/EP2006494A1/en
Priority to PCT/EP2008/057839 priority patent/WO2008155400A1/en
Publication of EP2006494A1 publication Critical patent/EP2006494A1/en
Withdrawn legal-status Critical Current

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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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
    • 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
    • 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
    • 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
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet
    • 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
    • F05D2260/00—Function
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05D2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources

Definitions

  • the invention relates to the field of turbomachines subjected to exhaust gases of internal combustion engines.
  • It relates to a drive for a guide device for generating a Vordralls in the intake of a compressor and an exhaust gas turbocharger with such a Vordrall guide.
  • Exhaust gas turbochargers are used to increase the performance of internal combustion engines (reciprocating engines). In modern internal combustion engines, the adaptation of the exhaust gas turbocharger to variable operating conditions will become more difficult.
  • a widely used option is the so-called variable turbine and / or compressor geometry.
  • the stator vanes are aligned more or less steeply with the flow upstream of the turbine wheel in accordance with turbine power requirements.
  • the vanes in the diffuser downstream of the compressor wheel are aligned more or less steeply to the flow.
  • Vordrall guiding devices are approximately from the DE 36 13 857 A1 , or the European patent application of 31 March 2006 with the application number 06405137.8 , the contents of which are incorporated by reference into this application.
  • These pre-whirl baffles include a plurality of vanes aligned radially with respect to the compressor axis.
  • Each of the guide vanes in addition to the projecting into the flow channel blade profile a blade shank with which the blade profile is rotatably mounted in a housing.
  • the blade profile can be rotated about the axis of the blade shank via an adjusting lever.
  • an adjusting ring is provided, which is arranged concentrically to the axis of the compressor.
  • the present invention enables an extremely compact, robust and reliably sealed integration of a pilot wheel drive.
  • a linear actuator for example a stepper motor with threaded spindle, is used.
  • This actuator is relatively inexpensive and very compact. In addition, it is quite robust in terms of vibration and temperature loads.
  • the threaded spindle engages in a spindle nut, which is fastened to a translationally displaceable element (dip tube). Turning the spindle moves the element to the desired position.
  • the drive of the adjusting ring via a sliding pin with parallel milled which rotatably mounted in the two tabs of the U-ring.
  • the coupling of the sliding pin via a parallel-walled groove in the dip tube.
  • a dip tube is used with a blind hole which is sealed with a piston sealing ring. This ensures that no leakage can escape from the compressor housing. This is particularly important for premixed gas engines.
  • Fig. 1 shows a Vordrall guide in the intake of a compressor.
  • the compressor comprises a compressor housing, which comprises the compressor wheel and forms the flow channel of the medium to be compressed.
  • the radially outer housing 13 comprises in the illustrated embodiment a housing extension 14 and a cover 15 for covering the arranged in the housing extension drive for the pre-whirling guide.
  • the guide device comprises a plurality of guide vanes 20 arranged aligned with respect to the compressor axis in the radial direction.
  • the guide vanes are rotatably mounted in an inner housing 10.
  • an inner housing 10 In the central area of the guide, in which the tips of the plurality of vanes come together, a central housing body 12 is arranged. This central body is concentric with the axis of the compressor. The central body is part of the inner housing, which forms the flow channel of the medium to be compressed in the region of the guide device.
  • the central body 12 can be positioned and retained via one or more radially extending retaining ribs 11. In order not to affect the flow in the flow channel with such ribs, the central body can also be positioned and held on the vane tips.
  • Fig. 2 allows a view into the interior of the outer housing, in particular to the inventive drive for the pre-whirling guide and Fig. 3 shows in detail the individual components of the drive in disassembled state.
  • Each of the guide vanes of the guide device comprises in addition to the projecting into the flow channel blade profile 21 a blade shank 22, with which the blade profile is rotatably mounted in the housing, not shown.
  • the blade profile can rotate about the axis of the blade shank.
  • an adjusting ring 30 is provided, which is arranged concentrically to the axis of the compressor.
  • the torque is transmitted from the adjusting ring 30 on the blade shank 22 via a arranged at the free end of the adjusting lever 23 ball 24.
  • the ball head 24 is guided in a groove 31 of the adjusting ring with two walls running parallel to each other. In the groove of the ball head has the translational and rotational freedom of movement, which are necessary to implement the torque transfer.
  • the ball head is arranged in a translationally displaceable sliding shoe 25. If the adjusting ring 30 is rotated for adjusting the guide vanes, the sliding shoe 25 is displaced by the ball head 24 in the groove 31 in the plane of the groove walls. If the adjusting ring is turned away, the position of the adjusting lever changes relative to the adjusting ring.
  • the translational displacement of the center of rotation of the ball head is made possible by the, along the groove walls sliding shoe, while for the rotation of the ball head in the molded by the shoe shoe ball cup arbitrarily can turn in any direction.
  • the shoe may also be formed in two parts by a ball socket half is arranged with a flat, sliding back on each side of the groove in the adjusting ring.
  • the torque transmission from the adjusting ring to the blade shank can also take place via a cylindrical pin arranged at the free end of the adjusting lever.
  • the pin engages in a bore of an adjusting ring also mounted in a bore, cylindrical sliding element.
  • the sliding cylinder can be rotated in the bore around its own axis and moved along its own axis.
  • the bore in the sliding cylinder, which is provided for receiving the pin, is perpendicular to the axis of the sliding cylinder.
  • the pin can be rotated in this hole around its own axis and move along its own axis.
  • the pin can be fixed in the sliding cylinder and mounted for sliding in a corresponding hole in the free end of the adjusting lever of the guide vane.
  • Blade profile 21, blade shank 22 and the adjusting lever 23 together with the necessary for torque transfer essay can be formed one or more parts.
  • an actuator device 50 for rotating the adjusting ring 30, an actuator device 50 according to the invention is provided which, in addition to the actuator 51, ie the actual drive, comprises at least one movable element running tangentially to the adjusting ring 30, which is connected to the adjusting ring via a coupling.
  • the actuator 51 drives a rotatable threaded spindle 52 which rotates but does not translate.
  • the threaded spindle is a cylindrical round rod, on which a trapezoidal or flat thread is applied. Also conceivable are arcuate grooves for receiving a recirculating ball nut.
  • the actuator is optionally designed as an electric stepper motor, in which the desired rotation direction can be set via the control connection 57.
  • the actuator 51 is with Fastening means 58 fastened to the housing in the region of the housing extension 14.
  • the spindle 52 extends in the tangential direction to the adjusting ring. Placed on the spindle is a translationally displaceable in the tangential direction element, the dip tube 54.
  • the dip tube is, as in the section to Fig.
  • the dip tube 4 can be seen, guided in a housing bore 16 in the housing extension 14 and has a central longitudinal bore.
  • a spindle nut 53 is arranged, which converts the rotational movement of the spindle into a translational movement of the dip tube.
  • the dip tube moves along the housing bore 16 back and forth.
  • the stroke of the dip tube is limited by the two stops bottom hole 17 and motor flange 59.
  • the coupling to the adjusting ring 30 is arranged at the free end of the dip tube.
  • the dip tube has a parallel-walled groove 55 which is arranged laterally offset from the central bore in the dip tube and is provided for receiving a sliding pin 41.
  • the sliding pin is additionally connected to the adjusting ring 30 by being rotatably disposed in a bore 32 in radially outwardly projecting tabs 33 of the adjusting ring 30.
  • the backup of the stepped slide pin in the holes can be done very compact and reliable with a locking ring 42. After the stepped sliding pin has been pushed all the way into the holes, the locking ring 42 is inserted into a designated groove in the front hole 32 on the front side of the pin.
  • the dip tube is laterally tapered.
  • the central bore can be formed in the dip tube as a blind hole and the dip tube in the housing bore 16 sealed by piston sealing ring 56.
  • the sealing ring is arranged in a groove provided for this purpose in the dip tube.
  • the guide of the dip tube can also be done by the spindle.
  • the dip tube, driven and guided by the spindle slides in a tangential direction along the adjusting ring back and forth.
  • the threaded spindle can interact directly with arranged on the adjusting ring teeth.
  • the Rotational movement of the spindle converted directly into a rotational movement of the adjusting ring.
  • both cases the actuator to be used is inexpensive and can be installed very compact.
  • both embodiments are quite robust in terms of vibration and temperature loads, since no loose parts interact over several joints and angulations.

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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 has a suction area that is sealed to an actuator (50) of a prerotation-guiding device, where the sealing takes place by an dip tube (54) that is movable tangential to an adjusting ring (30) of the guiding device. The adjusting ring adjusts a guiding blade (20) of the guiding device, where the actuator drives the adjusting ring and is designed as a stepper motor. A threaded spindle (52) engages in a spindle groove that is secured to the element. The adjusting ring is driven by a sliding pin (41) having milled grooves that are arranged in parallel.

Description

Technisches GebietTechnical area

Die Erfindung bezieht sich auf das Gebiet der mit Abgasen von Brennkraftmaschinen beaufschlagten Strömungsmaschinen.The invention relates to the field of turbomachines subjected to exhaust gases of internal combustion engines.

Sie betrifft einen Antrieb für eine Leitvorrichtung zum Erzeugen eines Vordralls im Ansaugbereich eines Verdichters sowie einen Abgasturbolader mit einer solchen Vordrall-Leitvorrichtung.It relates to a drive for a guide device for generating a Vordralls in the intake of a compressor and an exhaust gas turbocharger with such a Vordrall guide.

Stand der TechnikState of the art

Abgasturbolader werden zur Leistungssteigerung von Brennkraftmaschinen (Hubkolbenmotoren) eingesetzt. Bei modernen Brennkraftmaschinen wird die Anpassung der Abgasturbolader an variable Betriebsbedingungen zunehmen schwieriger. Eine weit verbreitete Möglichkeit dazu bietet die so genannte variable Turbinen- und/oder Verdichtergeometrie. Bei der variablen Turbinengeometrie werden die Leitschaufeln des Leitapparates stromauf des Turbinenrades entsprechend dem Leistungsbedarf der Turbine mehr oder weniger steil zur Strömung ausgerichtet. Bei der variablen Verdichtergeometrie werden die Leitschaufeln im Diffusor stromab des Verdichterrades mehr oder weniger steil zur Strömung ausgerichtet.Exhaust gas turbochargers are used to increase the performance of internal combustion engines (reciprocating engines). In modern internal combustion engines, the adaptation of the exhaust gas turbocharger to variable operating conditions will become more difficult. A widely used option is the so-called variable turbine and / or compressor geometry. In the variable turbine geometry, the stator vanes are aligned more or less steeply with the flow upstream of the turbine wheel in accordance with turbine power requirements. In the variable compressor geometry, the vanes in the diffuser downstream of the compressor wheel are aligned more or less steeply to the flow.

Eine weitere Möglichkeit zur Anpassung des Abgasturboladers an die variablen Betriebsbedingungen bieten Vordrall-Leitvorrichtungen, welche im Luftansaugebereich des Verdichters in der angesaugten Luft einen bestimmten Vordrall erzeugen, je nach Betriebspunkt mehr oder weniger ausgeprägt mit- oder gegenläufig zur Drehrichtung des Verdichterrades.Another way to adapt the exhaust gas turbocharger to the variable operating conditions offer Vordrall guide devices, which produce a certain Vordrall in the Luftansaugebereich the compressor in the intake air, depending on the operating point more or less pronounced mit- or opposite to the direction of rotation of the compressor wheel.

Solche Vordrall-Leitvorrichtungen, sind etwa aus der DE 36 13 857 A1 , oder der europäische Patentanmeldung vom 31. März 2006 mit der Anmeldenummer 06405137.8 , deren Inhalt in diese Anmeldung durch Verweis einbezogen wird, bekannt.Such Vordrall guiding devices are approximately from the DE 36 13 857 A1 , or the European patent application of 31 March 2006 with the application number 06405137.8 , the contents of which are incorporated by reference into this application.

Diese Vordrall-Leitvorrichtungen umfassen mehrere, bezüglich der Verdichterachse in radialer Richtung ausgerichtet angeordnete Leitschaufeln. Jede der Leitschaufeln umfasst neben dem in den Strömungskanal hineinragenden Schaufelprofil einen Schaufelschaft, mit welchem das Schaufelprofil drehbar in einem Gehäuse gelagert ist. Über einen Verstellhebel lässt sich das Schaufelprofil um die Achse des Schaufelschaftes drehen. Zum Antrieb des Verstellhebels, und somit zum Verstellen des Schaufelprofils, ist ein Verstellring vorgesehen, welcher konzentrisch zur Achse des Verdichters angeordnet ist. Durch Drehen des Verstellrings, werden alle Schaufeln gleichzeitig um die jeweiligen Achsen ihrer Schaufelschäfte verstellt, wodurch die zum Verdichterrad geführte Strömung mit einem Mit- oder Gegendrall (bezüglich der Drehrichtung des Verdichterrades) beaufschlagt wird. Der Antrieb des Verstellrings erfolgt bei herkömmlichen Vordrall-Leitvorrichtungen dann durch einen Aktuator ausserhalb des Gehäuses. Dieser separate Anbau eines Aktuators ausserhalb des Gehäuses beansprucht relativ viel Bauraum sowie meistens zusätzliche Hilfssupports für die Abstützung des Antriebes.These pre-whirl baffles include a plurality of vanes aligned radially with respect to the compressor axis. Each of the guide vanes, in addition to the projecting into the flow channel blade profile a blade shank with which the blade profile is rotatably mounted in a housing. The blade profile can be rotated about the axis of the blade shank via an adjusting lever. To drive the adjusting lever, and thus for adjusting the blade profile, an adjusting ring is provided, which is arranged concentrically to the axis of the compressor. By turning the adjusting ring, all blades are adjusted simultaneously about the respective axes of their blade shafts, whereby the flow guided to the compressor wheel with a positive or counter-rotating (with respect to the direction of rotation of the compressor wheel) is applied. The drive of the adjusting ring takes place in conventional pre-whirling Leitvorrichtungen then by an actuator outside the housing. This separate attachment of an actuator outside the housing requires a relatively large amount of space and usually additional auxiliary support for the support of the drive.

Kurze Darstellung der ErfindungBrief description of the invention

Die vorliegende Erfindung ermöglicht eine extrem kompakte, robuste und zuverlässig abgedichtete Integration eines Vorleitrad-Antriebes.The present invention enables an extremely compact, robust and reliably sealed integration of a pilot wheel drive.

Als Aktuator wird optional ein Linearaktuator, zum Beispiel ein Schrittmotor mit Gewindespindel, verwendet. Dieser Aktuator ist relativ kostengünstig und baut sehr kompakt. Zudem ist er recht robust in Bezug auf Vibrationen und Temperaturbelastungen.As an optional actuator, a linear actuator, for example a stepper motor with threaded spindle, is used. This actuator is relatively inexpensive and very compact. In addition, it is quite robust in terms of vibration and temperature loads.

Erfindungsgemäss greift die Gewindespindel in eine Spindelmutter ein, welche an einem translatorisch verschiebbaren Element (Tauchrohr) befestigt ist. Durch Drehen der Spindel wird das Element in die gewünschte Position geschoben. Der Antrieb des Verstellrings erfolgt über einen Gleitstift mit parallel angeordneten Anfräsungen welcher drehbar in den beiden Laschen des Nutringes gelagert wird. Die Ankoppelung des Gleitstifts erfolgt über eine parallelwandige Nut im Tauchrohr.According to the invention, the threaded spindle engages in a spindle nut, which is fastened to a translationally displaceable element (dip tube). Turning the spindle moves the element to the desired position. The drive of the adjusting ring via a sliding pin with parallel milled which rotatably mounted in the two tabs of the U-ring. The coupling of the sliding pin via a parallel-walled groove in the dip tube.

Durch die Anwendung eines Gleitstift/Nut-Verbindung anstelle einer Schwenklaschen-Verbindung kann wertvoller axialer Bauraum gewonnen werden.Through the use of a sliding pin / groove connection instead of a pivot plate connection valuable axial space can be obtained.

Durch die seitliche Versetzung der Nut innerhalb der axialen Ersteckung des Tauchrohr-Sackloches erfolgt eine zusätzliche Einsparung in der axialen Baulänge.By the lateral displacement of the groove within the axial Aussteckung the dip tube blind hole is an additional saving in the axial length.

Um eine einwandfreie Abdichtung zu ermöglichen wird ein Tauchrohr mit einem Sackloch verwendet welches mit einem Kolbendichtring abgedichtet wird. Auf diese Weise wird sichergestellt, dass keine Leckage aus dem Verdichtergehäuse austreten kann. Insbesondere bei Gasmotoren mit Premix ist dies von zentraler Bedeutung.In order to allow a perfect seal a dip tube is used with a blind hole which is sealed with a piston sealing ring. This ensures that no leakage can escape from the compressor housing. This is particularly important for premixed gas engines.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Nachfolgend wird eine Ausführungsform der Erfindung anhand von Zeichnungen detailliert erläutert. Hierbei zeigt

Fig. 1
einen isometrische Ansicht auf eine im Verdichtergehäuse angeordnete Vordrall-Leitvorrichtung,
Fig. 2
eine isometrische Detailansicht des Antriebs der Vordrall-Leitvorrichtung nach Fig. 1,
Fig. 3
die einzelnen Komponenten des Antriebs der Vordrall-Leitvorrichtung nach Fig. 2, und
Fig. 4
einen Schnitt senkrecht zur Verdichterachse durch den Antrieb der Vordrall-Leitvorrichtung nach Fig. 2.
Hereinafter, an embodiment of the invention will be explained in detail with reference to drawings. This shows
Fig. 1
an isometric view of a arranged in the compressor housing Vordrall guide device,
Fig. 2
an isometric view of the detail of the drive of the pre-whirling guide after Fig. 1 .
Fig. 3
the individual components of the drive the Vordrall guide after Fig. 2 , and
Fig. 4
a section perpendicular to the compressor axis by the drive of the Vordrall guide after Fig. 2 ,

Weg zur Ausführung der ErfindungWay to carry out the invention

Fig. 1 zeigt eine Vordrall-Leitvorrichtung im Ansaugbereich eines Verdichters. Solche Verdichter werden, wie eingangs beschrieben, in Abgasturboladern zum Steigern der Leistung von Brennkraftmaschinen eingesetzt. Der Verdichter umfasst ein Verdichtergehäuse, welches das Verdichterrad umfasst und den Strömungskanal des zu verdichtenden Mediums bildet. Das radial äussere Gehäuse 13 umfasst in der dargestellten Ausführungsform einen Gehäusefortsatz 14 sowie eine Deckel 15 zum Abdecken des im Gehäusefortsatz angeordneten Antriebs für die Vordrall-Leitvorrichtung. Fig. 1 shows a Vordrall guide in the intake of a compressor. Such compressors are, as described above, used in exhaust gas turbochargers to increase the performance of internal combustion engines. The compressor comprises a compressor housing, which comprises the compressor wheel and forms the flow channel of the medium to be compressed. The radially outer housing 13 comprises in the illustrated embodiment a housing extension 14 and a cover 15 for covering the arranged in the housing extension drive for the pre-whirling guide.

Die Leitvorrichtung umfasst mehrere, bezüglich der Verdichterachse in radialer Richtung ausgerichtet angeordnete Leitschaufeln 20. Die Leitschaufeln sind in einem inneren Gehäuse 10 drehbar gelagert. Im zentralen Bereich der Leitvorrichtung, in welchem die Spitzen der mehreren Leitschaufeln zusammen kommen, ist ein zentraler Gehäusekörper 12 angeordnet. Dieser Zentralkörper liegt konzentrisch auf der Achse des Verdichters. Der Zentralkörper ist Teil des inneren Gehäuses, welches im Bereich der Leitvorrichtung den Strömungskanal des zu verdichtenden Mediums bildet.The guide device comprises a plurality of guide vanes 20 arranged aligned with respect to the compressor axis in the radial direction. The guide vanes are rotatably mounted in an inner housing 10. In the central area of the guide, in which the tips of the plurality of vanes come together, a central housing body 12 is arranged. This central body is concentric with the axis of the compressor. The central body is part of the inner housing, which forms the flow channel of the medium to be compressed in the region of the guide device.

Wie dargestellt, kann der Zentralkörper 12 über eine oder mehrere radial verlaufende Halterippen 11 positioniert und festgehalten sein. Um die Strömung im Strömungskanal nicht mit solchen Rippen beeinträchtigen zu müssen, kann der Zentralkörper auch über die Leitschaufelspitzen positioniert und festgehalten werden.As shown, the central body 12 can be positioned and retained via one or more radially extending retaining ribs 11. In order not to affect the flow in the flow channel with such ribs, the central body can also be positioned and held on the vane tips.

Fig. 2 erlaubt einen Blick ins Innere des äusseren Gehäuses, insbesondere auf den erfindungsgemässen Antrieb für die Vordrall-Leitvorrichtung und Fig. 3 zeigt im Detail die einzelnen Bestandteile des Antriebs in demontiertem Zustand. Fig. 2 allows a view into the interior of the outer housing, in particular to the inventive drive for the pre-whirling guide and Fig. 3 shows in detail the individual components of the drive in disassembled state.

Jede der Leitschaufeln der Leitvorrichtung umfasst neben dem in den Strömungskanal hineinragenden Schaufelprofil 21 einen Schaufelschaft 22, mit welchem das Schaufelprofil drehbar in dem nicht dargestellten Gehäuse gelagert ist. Über einen Verstellhebel 23 lässt sich das Schaufelprofil um die Achse des Schaufelschaftes drehen. Zum Antrieb des Verstellhebels, und somit zum Verstellen des Schaufelprofils, ist ein Verstellring 30 vorgesehen, welcher konzentrisch zur Achse des Verdichters angeordnet ist.Each of the guide vanes of the guide device comprises in addition to the projecting into the flow channel blade profile 21 a blade shank 22, with which the blade profile is rotatably mounted in the housing, not shown. About an adjusting lever 23, the blade profile can rotate about the axis of the blade shank. For driving the adjusting lever, and thus for adjusting the blade profile, an adjusting ring 30 is provided, which is arranged concentrically to the axis of the compressor.

In der dargestellten Ausführungsform erfolgt die Drehmomentübertragung vom Verstellring 30 auf den Schaufelschaft 22 über einen am freien Ende des Verstellhebels 23 angeordneten Kugelkopf 24. Der Kugelkopf 24 wird in einer Nut 31 des Verstellrings mit zwei parallel zueinander verlaufenden Wänden geführt. In der Nut hat der Kugelkopf die translatorischen und rotatorischen Bewegungsfreiheiten, welche zur Umsetzung der Momentübertragung notwendig sind. Der Kugelkopf ist in einem translatorisch verschiebbar angeordneten Gleitschuh 25 angeordnet. Wird der Verstellring 30 zum Verstellen der Leitschaufeln gedreht, so wird der Gleitschuh 25 von dem Kugelkopf 24 in der Nut 31 in der Ebene der Nutwände verschoben. Wird der Stellring weggedreht, so verändert sich die Lage des Verstellhebels relativ zum Verstellring. Neben der translatorischen Verschiebung des Rotationszentrums des Kugelkopfes innerhalb der Nut, kommt es zu einer Verdrehung des Verstellhebels bezüglich des Verstellrings. Die translatorische Verschiebung des Rotationszentrums des Kugelkopfes wird durch den, den Nutwänden entlang gleitenden Gleitschuh ermöglicht, während sich für die Verdrehung der Kugelkopf in der durch den Gleitschuh geformten Kugelpfanne beliebig in jede Richtung verdrehen kann. Der Gleitschuh kann auch zweiteilig ausgebildet sein, indem auf jeder Seite der Nut im Verstellring eine Kugelpfannenhälfte mit einer flachen, gleitfähigen Rückseite angeordnet ist.In the illustrated embodiment, the torque is transmitted from the adjusting ring 30 on the blade shank 22 via a arranged at the free end of the adjusting lever 23 ball 24. The ball head 24 is guided in a groove 31 of the adjusting ring with two walls running parallel to each other. In the groove of the ball head has the translational and rotational freedom of movement, which are necessary to implement the torque transfer. The ball head is arranged in a translationally displaceable sliding shoe 25. If the adjusting ring 30 is rotated for adjusting the guide vanes, the sliding shoe 25 is displaced by the ball head 24 in the groove 31 in the plane of the groove walls. If the adjusting ring is turned away, the position of the adjusting lever changes relative to the adjusting ring. In addition to the translational displacement of the center of rotation of the ball head within the groove, there is a rotation of the adjusting lever with respect to the adjusting ring. The translational displacement of the center of rotation of the ball head is made possible by the, along the groove walls sliding shoe, while for the rotation of the ball head in the molded by the shoe shoe ball cup arbitrarily can turn in any direction. The shoe may also be formed in two parts by a ball socket half is arranged with a flat, sliding back on each side of the groove in the adjusting ring.

Alternativ kann die Drehmomentübertragung vom Verstellring auf den Schaufelschaft auch über einen am freien Ende des Verstellhebels angeordneten, zylinderförmigen Stift erfolgen. Der Stift greift in eine Bohrung eines im Verstellring ebenfalls in einer Bohrung gelagerten, zylinderförmigen Gleitelements ein. Der Gleitzylinder lässt sich in der Bohrung um die eigene Achse drehen und entlang der eigenen Achse verschieben. Die Bohrung im Gleitzylinder, welche zur Aufnahme des Stifts vorgesehen ist, steht senkrecht zur Achse des Gleitzylinders. Der Stift lässt sich in dieser Bohrung um seine eigene Achse drehen und entlang seiner eigenen Achse verschieben. Somit sind wiederum die für die Umsetzung der Momentübertragung notwendigen Bewegungsfreiheiten, je zwei translatorische und rotatorische, gegeben. Optional kann der Stift, im Gleitzylinder fixiert und dafür in einer entsprechenden Bohrung im freien Ende des Verstellhebels der Leitschaufel gleitend gelagert sein.Alternatively, the torque transmission from the adjusting ring to the blade shank can also take place via a cylindrical pin arranged at the free end of the adjusting lever. The pin engages in a bore of an adjusting ring also mounted in a bore, cylindrical sliding element. The sliding cylinder can be rotated in the bore around its own axis and moved along its own axis. The bore in the sliding cylinder, which is provided for receiving the pin, is perpendicular to the axis of the sliding cylinder. The pin can be rotated in this hole around its own axis and move along its own axis. Thus, in turn, the necessary for the implementation of torque transfer freedom of movement, two translational and rotational, given. Optionally, the pin can be fixed in the sliding cylinder and mounted for sliding in a corresponding hole in the free end of the adjusting lever of the guide vane.

Anstelle der dargestellten und detailliert beschriebenen sind weitere Ausführungsformen zur Momentübertragung denkbar, etwa mit einem als Zahnradsegment ausgebildeten Verstellhebel, welcher in dem mit einem Zahnkranz versehenen Verstellring eingreift.Instead of the illustrated and described in detail further embodiments for torque transmission are conceivable, for example with a trained as a gear segment adjusting lever, which engages in the provided with a ring gear adjusting ring.

Schaufelprofil 21, Schaufelschaft 22 und der Verstellhebel 23 mitsamt dem für die Momentübertragung notwendigen Aufsatz können ein- oder mehrteilig ausgebildet sein.Blade profile 21, blade shank 22 and the adjusting lever 23 together with the necessary for torque transfer essay can be formed one or more parts.

Zum Verdrehen des Verstellringes 30 ist erfindungsgemäss eine Aktuator-Vorrichtung 50 vorgesehen, welche neben dem Aktuator 51, also dem eigentlichen Antrieb, mindestens ein tangential zum Verstellring 30 verlaufendes, bewegliches Element umfasst, welches über eine Kupplung mit dem Verstellring verbunden ist. Dabei sind mehrere Ausführungsmöglichkeiten vorgesehen.For rotating the adjusting ring 30, an actuator device 50 according to the invention is provided which, in addition to the actuator 51, ie the actual drive, comprises at least one movable element running tangentially to the adjusting ring 30, which is connected to the adjusting ring via a coupling. Several design options are provided.

In der dargestellten Ausführungsform treibt der Aktuator 51 eine drehbare Gewindespindeln 52 an, welche rotiert, aber sich translatorisch nicht verschiebt. Bei der Gewindespindel handelt es sich um einen zylindrischen Rundstab, auf dem bei ein Trapez- oder Flachgewinde aufgebracht ist. Ebenfalls denkbar sind kreisbogenförmige Rillen zur Aufnahme einer Kugelumlaufgewindemutter. Der Aktuator ist optional als elektrischer Schrittmotor ausgebildet, bei welchem über den Steueranschluss 57 die gewünschte Rotationsrichtung eingestellt werden kann. Der Aktuator 51 ist mit Befestigungsmitteln 58 am Gehäuse im Bereich des Gehäusefortsatzes 14 festgemacht. Die Spindel 52 erstreckt sich in tangentialer Richtung zum Verstellring. Auf der Spindel aufgesetzt ist ein translatorisch in tangentialer Richtung verschiebbares Element, das Tauchrohr 54. Das Tauchrohr ist, wie im Schnitt nach Fig. 4 ersichtlich ist, in einer Gehäusebohrung 16 im Gehäusefortsatz 14 geführt und weist eine zentrale Längsbohrung auf. In der Zentralbohrung ist eine Spindelmutter 53 angeordnet, welche die Rotationsbewegung der Spindel in eine translatorische Bewegung des Tauchrohrs umwandelt. Je nach Drehsinn der Spindel bewegt sich somit das Tauchrohr entlang der Gehäusebohrung 16 hin und zurück. Der Hub des Tauchrohres wird durch die beiden Anschläge Bohrungsgrund 17 und Motorflansch 59 begrenzt. Am freien Ende des Tauchrohrs ist die Kupplung zum Verstellring 30 angeordnet. Hierfür weist das Tauchrohr eine parallelwandige Nut 55 auf, welche seitlich versetzt zur Zentralbohrung im Tauchrohr angeordnet und zur Aufnahme eines Gleitstifts 41 vorgesehen ist. Der Gleitstift ist zusätzlich mit dem Verstellring 30 verbunden, indem er drehbar in einer Bohrung 32 in radial nach aussen abstehenden Laschen 33 des Verstellrings 30 angeordnet ist. Die Sicherung des gestuften Gleitstiftes in den Bohrungen kann sehr kompakt und zuverlässig mit einem Sicherungsring 42 erfolgen. Nachdem der gestufte Gleitstift bis zum Anschlag in die Bohrungen eingeschoben worden ist, wird der Sicherungsring 42 in eine dafür vorgesehene Nut in der vorderen Bohrung 32 auf der Stirnseite des Stiftes eingesetzt.In the illustrated embodiment, the actuator 51 drives a rotatable threaded spindle 52 which rotates but does not translate. The threaded spindle is a cylindrical round rod, on which a trapezoidal or flat thread is applied. Also conceivable are arcuate grooves for receiving a recirculating ball nut. The actuator is optionally designed as an electric stepper motor, in which the desired rotation direction can be set via the control connection 57. The actuator 51 is with Fastening means 58 fastened to the housing in the region of the housing extension 14. The spindle 52 extends in the tangential direction to the adjusting ring. Placed on the spindle is a translationally displaceable in the tangential direction element, the dip tube 54. The dip tube is, as in the section to Fig. 4 can be seen, guided in a housing bore 16 in the housing extension 14 and has a central longitudinal bore. In the central bore a spindle nut 53 is arranged, which converts the rotational movement of the spindle into a translational movement of the dip tube. Depending on the direction of rotation of the spindle thus the dip tube moves along the housing bore 16 back and forth. The stroke of the dip tube is limited by the two stops bottom hole 17 and motor flange 59. At the free end of the dip tube, the coupling to the adjusting ring 30 is arranged. For this purpose, the dip tube has a parallel-walled groove 55 which is arranged laterally offset from the central bore in the dip tube and is provided for receiving a sliding pin 41. The sliding pin is additionally connected to the adjusting ring 30 by being rotatably disposed in a bore 32 in radially outwardly projecting tabs 33 of the adjusting ring 30. The backup of the stepped slide pin in the holes can be done very compact and reliable with a locking ring 42. After the stepped sliding pin has been pushed all the way into the holes, the locking ring 42 is inserted into a designated groove in the front hole 32 on the front side of the pin.

Im Bereich der Laschen ist das Tauchrohr seitlich verjüngt.In the area of the tabs, the dip tube is laterally tapered.

Um eine verbesserte Abdichtung zu erzielen, kann die Zentralbohrung im Tauchrohr als Sackloch ausgebildet und das Tauchrohr in der Gehäusebohrung 16 mittels Kolbendichtring 56 abgedichtet sein. Der Dichtring ist dabei in einer dafür vorgesehenen Nut im Tauchrohr angeordnet.In order to achieve an improved seal, the central bore can be formed in the dip tube as a blind hole and the dip tube in the housing bore 16 sealed by piston sealing ring 56. The sealing ring is arranged in a groove provided for this purpose in the dip tube.

Optional, falls das Tauchrohr nicht in einer Gehäusebohrung geführt ist, kann die Führung des Tauchrohrs auch durch die Spindel erfolgen. In diesem Fall schiebt sich das Tauchrohr, von der Spindel angetrieben und geführt, in tangentialer Richtung entlang dem Verstellring hin und zurück.Optionally, if the dip tube is not guided in a housing bore, the guide of the dip tube can also be done by the spindle. In this case, the dip tube, driven and guided by the spindle, slides in a tangential direction along the adjusting ring back and forth.

In einer nicht dargestellten Ausführungsform, kann die Gewindespindel direkt mit auf dem Verstellring angeordneten Zähnen zusammenwirken. In diesem Fall wird die Rotationsbewegung der Spindel direkt in eine Rotationsbewegung des Verstellrings gewandelt.In one embodiment, not shown, the threaded spindle can interact directly with arranged on the adjusting ring teeth. In this case, the Rotational movement of the spindle converted directly into a rotational movement of the adjusting ring.

In beiden Fällen ist der zu verwendete Aktuator kostengünstig und kann sehr kompakt verbaut werden. Zudem sind beide Ausführungsformen recht robust in Bezug auf Vibrationen und Temperaturbelastungen, da keine losen Teile über mehrere Gelenke und Winkelungen zusammenwirken.In both cases, the actuator to be used is inexpensive and can be installed very compact. In addition, both embodiments are quite robust in terms of vibration and temperature loads, since no loose parts interact over several joints and angulations.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Inneres GehäuseteilInner housing part
1111
Halterippeholding rib
1212
Zentralkörpercentral body
1313
Äusseres GehäuseteilOuter housing part
1414
GehäusefortsatzHousing extension
1515
Gehäusedeckelhousing cover
1616
Gehäusebohrunghousing bore
1717
Bohrungsgrundhole bottom
2020
Leitschaufelvane
2121
Schaufelprofilblade profile
2222
Schaufelschaftblade shank
2323
Verstellhebel zum Bewegen der LeitschaufelnAdjustment lever for moving the guide vanes
2424
Kugelkopfball head
2525
Gleitschuhshoe
3030
Verstellring zum Bewegen der Leitschaufeln über die VerstellhebelAdjusting ring for moving the guide vanes via the adjusting lever
3131
Nut zur Aufnahme von GleitschuhGroove for receiving sliding shoe
3232
Ringbohrung zur Aufnahme von GleitstiftRing bore for receiving sliding pin
3333
Laschentabs
4141
Gleitstiftslide
4242
Sicherungsringcirclip
5050
Aktuator-VorrichtungActuator device
5151
Aktuator, LinearmotorActuator, linear motor
5252
Spindelspindle
5353
Spindelmutterspindle nut
5454
Verschiebbares Element, TauchrohrMovable element, immersion tube
5555
Nutgroove
5656
Dichtringseal
5757
Anschlusskabelconnection cable
5858
Befestigungsmittelfastener
5959
Motorflanschmotor flange

Claims (8)

Antrieb einer Vordrall-Leitvorrichtung zum Erzeugen eines Vordralls im Ansaugbereich eines Verdichters, umfassend einen schwenkbaren Verstellring (30) sowie einen Aktuator (50) zum Antreiben des Stellrings (30), dadurch gekennzeichnet, dass der Antrieb des Stellrings über ein tangential zum Verstellring (30) angeordnetes, bewegbares Element (52, 54) erfolgt.Drive a pre-whirling guide for generating a pre-whirl in the intake of a compressor, comprising a pivotable adjusting ring (30) and an actuator (50) for driving the adjusting ring (30), characterized in that the drive of the adjusting ring via a tangential to the adjusting ring (30 ) arranged, movable element (52, 54) takes place. Antrieb nach Anspruch 1, wobei der Antrieb des Stellrings über eine Gewindespindel (52) erfolgt.Drive according to claim 1, wherein the drive of the adjusting ring via a threaded spindle (52). Antrieb nach Anspruch 2, wobei die Gewindespindel in eine Spindelmutter eingreift, welche mit einem translatorisch verschiebbaren Element verbunden ist, welches mit dem Verstellring (30) gekuppelt ist.Drive according to claim 2, wherein the threaded spindle engages in a spindle nut, which is connected to a translationally displaceable element which is coupled to the adjusting ring (30). Antrieb nach Anspruch 3, wobei Kupplung mittels einer in das verschiebbare Element eingelassenen Nut (55) und eines in einer Bohrung (32) im Verstellring (30) angeordneten Gleitstiftes (41) erfolgt.Drive according to claim 3, wherein the coupling is effected by means of a groove (55) embedded in the displaceable element and a sliding pin (41) arranged in a bore (32) in the adjusting ring (30). Antrieb nach einem der Ansprüche 3 oder 4, wobei das verschiebbare Element ein in einer Gehäusebohrung (17) geführtes Tauchrohr (54) ist.Drive according to one of claims 3 or 4, wherein the displaceable element is in a housing bore (17) guided dip tube (54). Antrieb nach Anspruch 5, wobei am Tauchrohr (54) ein Dichtring (56) zur Abdichtung der Gehäusebohrung (17) angeordnet ist.Drive according to claim 5, wherein a sealing ring (56) for sealing the housing bore (17) is arranged on the dip tube (54). Antrieb nach Anspruch 1, wobei der Aktuator ein elektrischer Schrittmotor ist.Drive according to claim 1, wherein the actuator is an electric stepper motor. Abgasturbolader, umfassend einen Verdichter mit einer Vordrall-Leitvorrichtung mit einem Antrieb nach einem der vorangehenden Ansprüche.Exhaust gas turbocharger, comprising a compressor with a Vordrall guide with a drive according to one of the preceding claims.
EP07110647A 2007-06-20 2007-06-20 Drive for a pre-twist guide device Withdrawn EP2006494A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07110647A EP2006494A1 (en) 2007-06-20 2007-06-20 Drive for a pre-twist guide device
PCT/EP2008/057839 WO2008155400A1 (en) 2007-06-20 2008-06-20 Drive for a prerotation guide device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07110647A EP2006494A1 (en) 2007-06-20 2007-06-20 Drive for a pre-twist guide device

Publications (1)

Publication Number Publication Date
EP2006494A1 true EP2006494A1 (en) 2008-12-24

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Country Status (2)

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EP (1) EP2006494A1 (en)
WO (1) WO2008155400A1 (en)

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EP2472126A1 (en) * 2010-12-31 2012-07-04 Thermodyn Compressor with its drive unit and adjustable aerodynamic geometry
DE102012216656B3 (en) * 2012-09-18 2013-08-08 Siemens Aktiengesellschaft Adjustable diffuser
DE102018101527A1 (en) * 2018-01-24 2019-07-25 Man Energy Solutions Se axial flow
EP3892863A1 (en) * 2020-04-09 2021-10-13 BMTS Technology GmbH & Co. KG Compressor, actuator assembly for the compressor, and compressor mounting method
EP3892864A1 (en) 2020-04-09 2021-10-13 BMTS Technology GmbH & Co. KG Compressor
EP3682115B1 (en) * 2017-09-14 2022-06-15 Vitesco Technologies GmbH Compressor for a charging device of an internal combustion engine, and charging device for an internal combustion engine

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* Cited by examiner, † Cited by third party
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DE102014217217A1 (en) 2014-08-28 2016-03-03 Volkswagen Aktiengesellschaft Turbine for an internal combustion engine
DE102018217510A1 (en) * 2018-10-12 2020-04-16 BMTS Technology GmbH & Co. KG Compressor and a method for mounting an adjustment device in the compressor

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EP3682115B1 (en) * 2017-09-14 2022-06-15 Vitesco Technologies GmbH Compressor for a charging device of an internal combustion engine, and charging device for an internal combustion engine
DE102018101527A1 (en) * 2018-01-24 2019-07-25 Man Energy Solutions Se axial flow
EP3892863A1 (en) * 2020-04-09 2021-10-13 BMTS Technology GmbH & Co. KG Compressor, actuator assembly for the compressor, and compressor mounting method
EP3892864A1 (en) 2020-04-09 2021-10-13 BMTS Technology GmbH & Co. KG Compressor

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