EP2245275A1 - Guide vane for a variable turbine geometry - Google Patents

Guide vane for a variable turbine geometry

Info

Publication number
EP2245275A1
EP2245275A1 EP08869779A EP08869779A EP2245275A1 EP 2245275 A1 EP2245275 A1 EP 2245275A1 EP 08869779 A EP08869779 A EP 08869779A EP 08869779 A EP08869779 A EP 08869779A EP 2245275 A1 EP2245275 A1 EP 2245275A1
Authority
EP
European Patent Office
Prior art keywords
sections
guide vane
section
curvature
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08869779A
Other languages
German (de)
French (fr)
Other versions
EP2245275B1 (en
Inventor
Ralf Böning
Tobias Dettmann
Holger Fäth
Andre Kaufmann
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2245275A1 publication Critical patent/EP2245275A1/en
Application granted granted Critical
Publication of EP2245275B1 publication Critical patent/EP2245275B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • 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
    • F01D17/165—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • 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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/026—Scrolls for radial machines or engines
    • 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
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved
    • F05D2250/713—Shape curved inflexed

Definitions

  • the invention relates to a guide vane for a variable turbine geometry of a turbocharger.
  • a turbocharger generally consists of an exhaust gas turbine in the exhaust stream, which is connected via a shaft with a compressor in An ⁇ aug Th.
  • the turbine is set in rotation by the exhaust gas flow of the engine and thus drives the compressor.
  • the pressure in the intake tract of the engine is increased via the compressor, so that a larger amount of air enters the cylinder during the intake stroke than in a naturally aspirated engine. In this way, more oxygen is available for burning a correspondingly larger amount of fuel.
  • bypass or wastegate the hot exhaust gas is partly passed by the turbine and thus the performance of the turbine is reduced.
  • the turbine is designed so large that it works well well below the rated operating point of the engine.
  • turbochargers are known from the prior art, which are provided with a variable turbine geometry VTG, in order to better adapt the power output and the response to different operating conditions, such as load changes.
  • VTG variable turbine geometry
  • high peripheral components of the flow velocity and a high enthalpy gradient lead to a high turbine output and thus to a high boost pressure.
  • full open position of the vanes in turn, the maximum throughput of the turbine opens up high centripetal fraction of the velocity vector of the flow.
  • the advantage of this power control over a bypass control is that always the full exhaust gas mass flow is routed through the turbine and used for power conversion.
  • the shape of the blade profile is the main influencing factor for the thermodynamic efficiency, the control characteristics and the required radial space.
  • the profile of the adjusting blade there are a variety of shapes for the profile of the adjusting blade. In general, it is important to combine the optimum of efficiency, control characteristics and the smallest possible pitch circle (installation space).
  • the shape is described by the line of curvature that extends between the center of the head radius and the center of the end radius of the pitch blade. This curvature line is created by assuming tangential circles within the profile to the top and bottom. The connecting line of the circle centers here describes the curvature line.
  • curvature lines have a continuous course, i.
  • the individual curve pieces merge tangentially.
  • the curvature line has no kink.
  • a guide vane is provided, in particular for a turbocharger, wherein the manifold ment line of the guide vane has at least one or more areas with a discontinuous course.
  • the guide vane is particularly advantageous in the design of a flow profile.
  • the efficiency can be improved with unchanged control behavior and space requirements.
  • the line of curvature has at least one region with two sections which are connected to one another, the two sections discontinuously or not tangentially merging at their connection point.
  • the sections form a kink at their junction.
  • the line of curvature of the guide vane has, in addition to at least one region with a bend or with a non-tangential transition between two sections, at least one region whose two sections merge continuously or tangentially into one another at their junction.
  • the line of curvature of a guide vane can be varied as desired with continuously and discontinuously extending regions, depending on which flow profile is to be achieved.
  • At least one, several or all portions of the line of curvature are identical or different, for example with respect to their shape, position and / or dimension.
  • the guide vane for example consists of four sections, wherein the first and second section form a first region, with a continuous course.
  • a second region is formed by the second portion and a third portion, wherein the second and third portions at their junction discontinuously into each other or form a kink.
  • Such a vane is an example in which the curvature line has a kink.
  • the sections of the first or third area may in this case be curved, for example, both or at least one of them upwards or downwards.
  • the portions of which the curvature line is composed for example, arcuate or straight.
  • the sections can be curved upwards or downwards or, if the sections are straight, for example horizontally, vertically, or obliquely upwards or obliquely downwards.
  • the sections can be combined as desired with each other, wherein at least one area which is formed by the sections has a discontinuous course. In this way, a variety of flow profiles, depending on the desired function or desired application can be realized.
  • FIG. 2 shows a second embodiment of a guide vane according to the prior art
  • FIG. 3 shows a third embodiment of a guide vane according to the prior art
  • FIG. 4 shows a first embodiment of a guide vane according to the invention.
  • Fig. 5 shows a second embodiment of a vane according to the invention.
  • FIG. 1 a first embodiment of a guide vane 10 according to the prior art is shown.
  • the vane 10 is shown in a diagram, wherein the diagram has an X-axis and a Y-axis. This illustration applies to all guide vanes 10 as shown in FIGS. 1 to 5.
  • the shape of a vane 10 is normally described by the line of curvature 12 that extends between the midpoint 14 of the head radius and the midpoint 16 of the end radius of the vane 10.
  • This curvature line 12 is formed by 20 tangential circles are assumed within the profile of the guide vane 10 to the top and bottom 18 ,.
  • the connecting line of the circular center points describes the curvature line 12.
  • the curvature line 12 is wavy.
  • the curvature line 12 consists of four sections al to a4 together.
  • the first and second sections a1, a2, which form a first area b1 are in each case arched upwards in a curved shape, wherein the two sections a1, a2 of the curve 12 merge tangentially into one another at their connection point 22.
  • the area bl forms a continuous course without a kink.
  • the third portion a3 is also arcuate, being curved downward, in contrast to the first and second portions al, a2.
  • the second and third sections a2, a3 also merge tangentially into one another at their connection point 22, so that the second region b2, which is formed from the second and third sections a2, a3, has a continuous profile.
  • the two sections a3, a4 of the curvature line 12 merge tangentially into one another, ie the region b3 has a continuous course, without a kink being formed at the transition 22 between the two sections a3, a4.
  • All three areas bl to b3 extend above the X axis in the diagram in FIG. 1, furthermore, the first area bl is significantly longer and more curved than the third area b3.
  • the line of curvature 12 is also composed of four sections al to a4.
  • the curvature line 12 in this case runs above the X axis and in this case initially rises in an arc upwards, before it slowly drops towards the other end.
  • the first section al of the line of curvature 12 is arched downward in a downward arc and the adjoining section a2 is curved upward.
  • the two sections al and a2 tangentially merge into each other, so that the first area bl, by the first and second portion al, a2 has a continuous course.
  • the third section a3 is also curved arcuately upwards, wherein he and the second section a2 at their junction 22 tangentially merge into each other, without causing a kink arises.
  • the third region b3 of the curvature line 12 is formed from the third section a3 and a fourth section a4.
  • the fourth section a4 is arched downward in an arc shape, with the third and fourth sections a3, a4 merging tangentially into one another at their connection point 22.
  • Fig. 3 Further shown in Fig. 3 is a third embodiment of a prior art vane form.
  • the guide vane 10 consists, as in the first and second embodiment of four sections al to a4.
  • the curvature line 12 runs in a waveform initially in an arc above the X axis and then in an arc below the X axis.
  • the first and second sections al, a2 of the curvature line 12 is arcuate and extends upwardly curved. At their connection point 22, the two first and second sections al, a2 merge tangentially into one another.
  • the second region b2 of the curvature line 12 is formed by the second section a2 and a third section a3.
  • the third section a3 is also arcuate and curved downwards.
  • the two sections a2 and a3 pass tangentially into one another at their connection point 22, so that no sharp kink occurs in this area.
  • the fourth region b4 is formed by the third section a3 and a fourth section a4.
  • the fourth section a4 is likewise arched in an arcuate manner.
  • the guide vane 10 here consists for example of four sections al to a4.
  • a first region, consisting of the first and second sections al, a2, has a continuous course.
  • the first and second sections al, a2 is here arc-shaped and curved upwards.
  • the first section al passes tangentially into the second section a2, so that a continuous course is created without a kink.
  • a second region b2 is formed by the second portion a2 and a third portion a3, wherein the second and third portions a2, a3 are each arcuate and are curved upward.
  • the sections a2 and a3 do not tangentially merge into one another at their connection point 22 but form a kink 24.
  • the second area b2 does not form a continuous course as in the prior art but has a discontinuous course or has a sharp kink 24 at the Junction 22 of the two sections a2, a3.
  • the third area b3 consists of the third section a3 and a fourth section a4 and forms a continuous course.
  • the fourth section a4 is arc-shaped and arched upwards. At their connection point 22, the third and fourth sections a3, a4 merge tangentially into one another.
  • the guide vane 10 has a region b2 with a discontinuous course of the curvature line 12, in which the second and third sections a2, a3 at their junction 22 form a kind of kink 24 or not tangentially into each other.
  • the other areas b1 and b3 have a continuous course of the curvature line 12, without one of the areas forming a bend.
  • the curvature line 12 in the present case forms two arcs, once an upwardly arched arc of the sections al and a2 and another compared to a very much shallow arched arc consisting of the sections a3 and a4. Both bends form at their junction 22 the kink 24th
  • FIG. 5 a second embodiment of a guide blade 10 according to the invention is shown in FIG. 5.
  • the curvature line 12 of the guide vane 10 consists of four sections al to a4.
  • the first and second sections al, a2 is arc-shaped and arched upwards.
  • the first and second sections al, a2 merge tangentially into one another, so that the area b1, which is formed from the two sections al, a2, has a continuous course.
  • the second region b2 is formed from the second portion a2 and a third portion a3, wherein the third portion a3 is also curved upwards.
  • the two sections a2, a3 do not merge tangentially into one another at their connection point 22, but form a kind of kink 24, as shown in FIG.
  • the second area b2 has a discontinuous course.
  • the two third and fourth sections a3, a4 are here arc-shaped and curved upwards. At their junction 22 they go tangentially into each other.
  • the curvature line 12 of the guide vane 10 according to the invention has a discontinuous course at least in the region b2, while the two other regions b1 and b3 have a continuous course without buckling.
  • the first area bl is formed longer, or the stretched from the sections al and a2 arch.
  • the third area b3, or the arc stretched from the sections a3 and a4 is shorter in the second embodiment than in the first embodiment.
  • a guide vane may comprise at least one region consisting of two sections or a plurality of sections, for example two, three, four, five, six and more sections.
  • sections having an arbitrary shape, arrangement and / or dimensioning can be combined with one another.
  • the areas that are formed from the sections are formed from the sections.
  • the areas b 1 to b 3 are each arranged substantially above the x-axis in the diagrams.
  • the regions or sections of the curvature line 12 can run as desired, for example at least partially below the X axis, as is illustrated, for example, in FIG. 3 with reference to the prior art.
  • the portions of the line of curvature 12 may also extend entirely below or partially along the X-axis.
  • straight and arcuate portions at the curve line 12 of a vane 10 can be varied as desired.
  • the guide blade 10 can have at least one kink 24 or a plurality of kinks 24 or points at which the individual curve pieces of the curve line 12 do not merge tangentially into one another.
  • the curvature line 12 can have one, two, three, four or more of these so-called kinks 24 or non-tangential transitions, wherein the kinks 24 can be provided at arbitrary positions of the curvature line 12, depending on the function or intended use.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Supercharger (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Control Of Turbines (AREA)

Abstract

The invention relates to a guide vane (10), particularly for a turbo charger, wherein the curvature line (12) of the guide vane (10) has at least one or more regions (61, 62, 63) having a discontinuous course.

Description

Beschreibungdescription
Leitschaufel für eine variable TurbinengeometrieGuide vane for a variable turbine geometry
Die Erfindung betrifft eine Leitschaufel für eine variable Turbinengeometrie eines Turboladers.The invention relates to a guide vane for a variable turbine geometry of a turbocharger.
Ein Turbolader besteht im Allgemeinen aus einer Abgasturbine im Abgasstrom, die über eine Welle mit einem Verdichter im Anεaugtrakt verbunden ist. Dabei wird die Turbine vom Abgasstrom des Motors in Rotation versetzt und treibt so den Verdichter an. Über den Verdichter wird hierbei der Druck im Ansaugtrakt des Motors erhöht, so dass während des Ansaugtaktes eine größere Menge Luft in den Zylinder gelangt als bei einem Saugmotor. Auf diese Weise steht mehr Sauerstoff zur Verbrennung einer entsprechend größeren Kraftstoffmenge zur Verfügung.A turbocharger generally consists of an exhaust gas turbine in the exhaust stream, which is connected via a shaft with a compressor in Anεaugtrakt. In this case, the turbine is set in rotation by the exhaust gas flow of the engine and thus drives the compressor. In this case, the pressure in the intake tract of the engine is increased via the compressor, so that a larger amount of air enters the cylinder during the intake stroke than in a naturally aspirated engine. In this way, more oxygen is available for burning a correspondingly larger amount of fuel.
Bei herkömmlichen Turboladern wird der Ladedruck, wenn not- wendig, dadurch begrenzt, dass mit einem Abblasventil bzw.In conventional turbochargers, the charge pressure, if necessary, limited by the fact that with a blow-off valve or
Bypass oder Wastegate das heiße Abgas zum Teil an der Turbine vorbeigeführt und damit die Leistung der Turbine reduziert wird. Dafür wird die Turbine so groß ausgelegt, dass sie schon weit unterhalb des Nennarbeitspunktes des Motors gut arbeitet.Bypass or wastegate, the hot exhaust gas is partly passed by the turbine and thus the performance of the turbine is reduced. For this purpose, the turbine is designed so large that it works well well below the rated operating point of the engine.
Aus dem Stand der Technik sind des Weiteren Turbolader bekannt, die mit einer variablen Turbinengeometrie VTG versehen sind, um die Leistungsabgabe und das Ansprechverhalten an un- terschiedliche Betriebsbedingungen, wie beispielsweise Lastwechsel, besser anpassen zu können. Um das zu erreichen, befinden sich verstellbare, nicht rotierende Leitschaufeln im Turbineneintritt oder im Turbinengehäuse. In geschlossener Leitschaufel-Position führen dabei hohe Umfangskomponenten der Strömungsgeschwindigkeit und ein hohes Enthalpiegefälle zu einer hohen Turbinenleistung und damit einem hohen Ladedruck. In voll geöffneter Position der Leitschaufeln erschließt sich wiederum der maximale Durchsatz der Turbine bei hohem zentripetalem Anteil des Geschwindigkeitsvektors der Strömung. Der Vorteil dieser Leistungsregelung gegenüber einer Bypass-Regelung liegt darin, dass immer der volle Abgasmassenstrom über die Turbine geleitet und zur Leistungsumset- zung genutzt wird.Furthermore, turbochargers are known from the prior art, which are provided with a variable turbine geometry VTG, in order to better adapt the power output and the response to different operating conditions, such as load changes. To achieve this, there are adjustable, non-rotating vanes in the turbine inlet or in the turbine housing. In the closed vane position, high peripheral components of the flow velocity and a high enthalpy gradient lead to a high turbine output and thus to a high boost pressure. In full open position of the vanes, in turn, the maximum throughput of the turbine opens up high centripetal fraction of the velocity vector of the flow. The advantage of this power control over a bypass control is that always the full exhaust gas mass flow is routed through the turbine and used for power conversion.
Für die variable Turbinengeometrie ist die Form des Schaufelprofils Haupteinflussfaktor für die thermodynamische Effizienz, die Regelcharakteristik und den benötigten radialen Bauraum.For the variable turbine geometry, the shape of the blade profile is the main influencing factor for the thermodynamic efficiency, the control characteristics and the required radial space.
Im Stand der Technik gibt es die verschiedensten Formen für das Profil der Verstellschaufel. Generell gilt es, das Optimum an Wirkungsgrad, Regelcharakteristik und möglichst klei- nem Teilkreis (Bauraum) zusammenzuführen. Üblicherweise wird die Form über die Krümmungslinie beschrieben, die zwischen dem Mittelpunkt des Kopfradius und dem Mittelpunkt des Endradius der Verstellschaufel verläuft. Diese Krümmungslinie entsteht indem innerhalb des Profils zu Ober- und Unterseite tangentiale Kreise angenommen werden. Die Verbindungslinie der Kreismittelpunkte beschreibt hierbei die Krümmungslinie.In the prior art, there are a variety of shapes for the profile of the adjusting blade. In general, it is important to combine the optimum of efficiency, control characteristics and the smallest possible pitch circle (installation space). Usually, the shape is described by the line of curvature that extends between the center of the head radius and the center of the end radius of the pitch blade. This curvature line is created by assuming tangential circles within the profile to the top and bottom. The connecting line of the circle centers here describes the curvature line.
Dabei gibt es rein gerade, gekrümmte oder aus beiden Möglichkeiten zusammengesetzte Varianten. Allen diesen Varianten ist gemein, dass die Krümmungslinien einen kontinuierlichen Verlauf besitzen, d.h. die einzelnen Kurvenstücke gehen tangential ineinander über. Mit anderen Worten die Krümmungslinie weist keinen Knick auf.There are straight, curved or made up of both options variants. All these variants have in common that the curvature lines have a continuous course, i. The individual curve pieces merge tangentially. In other words, the curvature line has no kink.
Demnach ist es die Aufgabe der vorliegenden Erfindung, eine verbesserte Leitschaufelgeometrie für einen Turbolader mit einer variablen Turbinengeometrie bereitzustellen.Accordingly, it is the object of the present invention to provide an improved vane geometry for a turbocharger having a variable turbine geometry.
Diese Aufgabe wird durch eine Leitschaufel mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by a guide blade having the features of patent claim 1.
Demgemäß wird erfindungsgemäß eine Leitschaufel bereitgestellt, insbesondere für einen Turbolader, wobei die Krüm- mungslinie der Leitschaufel wenigstens einen oder mehrere Bereiche mit einem diskontinuierlichen Verlauf aufweist.Accordingly, according to the invention a guide vane is provided, in particular for a turbocharger, wherein the manifold ment line of the guide vane has at least one or more areas with a discontinuous course.
Die Leitschaufel ist besonders vorteilhaft bei der Ausgestal- tung eines Strömungsprofils. Hierbei kann der Wirkungsgrad verbessert werden bei unverändertem Regelungsverhalten und Bauraumbedarf .The guide vane is particularly advantageous in the design of a flow profile. Here, the efficiency can be improved with unchanged control behavior and space requirements.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfin- düng ergeben sich aus den Unteransprüchen sowie der Beschreibung unter Bezugnahme auf die Zeichnungen.Advantageous embodiments and further developments of the invention düng emerge from the subclaims and the description with reference to the drawings.
In einer erfindungsgemäßen Ausführungsform weist die Krümmungslinie wenigstens einen Bereich mit zwei Abschnitten auf, die miteinander verbunden sind, wobei die beiden Abschnitte an ihrer Verbindungsstelle diskontinuierlich bzw. nicht tangential ineinander übergehen. Mit anderen Worten, die Abschnitte bilden an ihrer Verbindungsstelle einen Knick aus. Dies hat den Vorteil, dass durch eine solche Gestaltung der Leitschaufel, beispielsweise bei einer variablen Turbinengeometrie, der Wirkungsgrad eines Turboladers verbessert werden kann .In one embodiment according to the invention, the line of curvature has at least one region with two sections which are connected to one another, the two sections discontinuously or not tangentially merging at their connection point. In other words, the sections form a kink at their junction. This has the advantage that by such a design of the guide vane, for example in a variable turbine geometry, the efficiency of a turbocharger can be improved.
In einer weiteren erfindungsgemäßen Ausführungsform weist die Krümmungslinie der Leitschaufel neben wenigstens einem Bereich mit einem Knick bzw. mit einem nicht tangentialen Übergang zwischen zwei Abschnitten wenigstens einen Bereich auf, dessen beide Abschnitte an ihrer Verbindungsstelle kontinuierlich bzw. tangential ineinander übergehen. Auf diese Weise kann die Krümmungslinie einer Leitschaufel beliebig geeignet variiert werden mit kontinuierlich und diskontinuierlich verlaufenden Bereichen, je nachdem welches Strömungsprofil erzielt werden soll.In a further embodiment according to the invention, the line of curvature of the guide vane has, in addition to at least one region with a bend or with a non-tangential transition between two sections, at least one region whose two sections merge continuously or tangentially into one another at their junction. In this way, the line of curvature of a guide vane can be varied as desired with continuously and discontinuously extending regions, depending on which flow profile is to be achieved.
Gemäß einer weiteren erfindungsgemäßen Ausführungsform sind wenigstens ein, mehrere oder alle Abschnitte der Krümmungslinie identisch oder unterschiedlich beispielsweise in Bezug auf ihre Form, Position und/oder Abmessung. Entsprechendes gilt für die Bereich der Krümmungslinie die durch die Abschnitte gebildet werden. So lassen sich unterschiedlichste Bauformen von Leitschaufeln realisieren, die alle wenigstens einen Bereich mit einem diskontinuierlichen Verlauf aufwei- sen .According to another embodiment of the invention, at least one, several or all portions of the line of curvature are identical or different, for example with respect to their shape, position and / or dimension. The same applies to the area of the curvature line formed by the sections. This makes it possible to realize a wide variety of guide blade designs, all of which have at least one region with a discontinuous course.
In einer weiteren erfindungsgemäßen Ausführungsform besteht die Leitschaufel beispielsweise aus vier Abschnitten, wobei der erste und zweite Abschnitt einen ersten Bereich bilden, mit einem kontinuierlichen Verlauf. Ein zweiter Bereich wird durch den zweiten Abschnitt und einen dritten Abschnitt gebildet, wobei der zweite und dritte Abschnitt an ihrer Verbindungsstelle diskontinuierlich ineinander übergehen bzw. einen Knick bilden. Ein dritte Bereich, bestehend aus dem dritten Abschnitt und einem vierten Abschnitt, weist wiederum einen kontinuierlich Verlauf auf. Eine solche Leitschaufel stellt ein Beispiel dar, bei welchem die Krümmungslinie einen Knick aufweist. Die Abschnitte des erste bzw. dritten Bereichs können hierbei beispielsweise beide oder wenigstens einer davon nach oben bzw. unten gewölbt sein.In a further embodiment of the invention, the guide vane for example consists of four sections, wherein the first and second section form a first region, with a continuous course. A second region is formed by the second portion and a third portion, wherein the second and third portions at their junction discontinuously into each other or form a kink. A third area, consisting of the third section and a fourth section, again has a continuous course. Such a vane is an example in which the curvature line has a kink. The sections of the first or third area may in this case be curved, for example, both or at least one of them upwards or downwards.
In einer weiteren erfindungsgemäßen Ausführungsform können die Abschnitte aus denen die Krümmungslinie zusammengesetzt ist beispielsweise bogenförmig oder gerade ausgebildet sein. Die Abschnitte können hierbei nach oben oder unten gewölbt bzw. wenn die Abschnitte gerade sind, beispielsweise horizontal, senkrecht, oder schräg nach oben oder schräg nach unten gerichtet sein. Die Abschnitte können hierbei beliebig miteinander kombiniert werden, wobei wenigstens ein Bereich der durch die Abschnitte gebildet wird einen diskontinuierlichen Verlauf aufweist. Auf diese Weise können eine Vielzahl von Strömungsprofilen, je nach gewünschter Funktion bzw. gewünschtem Einsatzzweck realisiert werden.In a further embodiment of the invention, the portions of which the curvature line is composed, for example, arcuate or straight. In this case, the sections can be curved upwards or downwards or, if the sections are straight, for example horizontally, vertically, or obliquely upwards or obliquely downwards. In this case, the sections can be combined as desired with each other, wherein at least one area which is formed by the sections has a discontinuous course. In this way, a variety of flow profiles, depending on the desired function or desired application can be realized.
Die Erfindung wird nachfolgend anhand der in den schemati- sehen Figuren der Zeichnungen angegebenen Ausführungsbeispiele näher erläutert. Es zeigen: Fig. 1 eine erste Ausführungsform einer Leitschaufel gemäß dem Stand der Technik;The invention will be explained in more detail with reference to the exemplary embodiments shown in the schematic figures of the drawings. Show it: 1 shows a first embodiment of a guide vane according to the prior art;
Fig. 2 eine zweite Ausführungsform einer Leitschaufel gemäß dem Stand der Technik;2 shows a second embodiment of a guide vane according to the prior art;
Fig. 3 eine dritte Ausführungsform einer Leitschaufel gemäß dem Stand der Technik;3 shows a third embodiment of a guide vane according to the prior art;
Fig. 4 eine ersten Ausführungsform einer Leitschaufel gemäß der Erfindung; und4 shows a first embodiment of a guide vane according to the invention; and
Fig. 5 eine zweite Ausführungsform einer Leitschaufel gemäß der Erfindung.Fig. 5 shows a second embodiment of a vane according to the invention.
In den Figuren bezeichnen gleiche Bezugszeichen gleiche oder funktionsgleiche Komponenten, soweit nichts Gegenteiliges angegeben ist.In the figures, the same reference numerals designate the same or functionally identical components, unless indicated otherwise.
In Fig. 1 ist eine erste Ausführungsform einer Leitschaufel 10 gemäß dem Stand der Technik gezeigt. Die Leitschaufel 10 ist dabei in einem Diagramm eingezeichnet, wobei das Diagramm eine X-Achse und eine Y-Achse aufweist. Diese Darstellung gilt für alle Leitschaufeln 10 wie sie in den Fig. 1 bis 5 gezeigt sind.In Fig. 1, a first embodiment of a guide vane 10 according to the prior art is shown. The vane 10 is shown in a diagram, wherein the diagram has an X-axis and a Y-axis. This illustration applies to all guide vanes 10 as shown in FIGS. 1 to 5.
Wie zuvor beschrieben, wird die Form einer Leitschaufel 10 normalerweise über die Krümmungslinie 12 beschrieben, die zwischen dem Mittelpunkt 14 des Kopfradius und dem Mittelpunkt 16 des Endradius der Leitschaufel 10 verläuft. Diese Krümmungslinie 12 entsteht indem innerhalb des Profils der Leitschaufel 10 zu Ober- und Unterseite 18, 20 tangentiale Kreise angenommen werden. Die Verbindungslinie der Kreismit- telpunkte beschreibt dabei die Krümmungslinie 12.As previously described, the shape of a vane 10 is normally described by the line of curvature 12 that extends between the midpoint 14 of the head radius and the midpoint 16 of the end radius of the vane 10. This curvature line 12 is formed by 20 tangential circles are assumed within the profile of the guide vane 10 to the top and bottom 18 ,. The connecting line of the circular center points describes the curvature line 12.
Im vorliegenden Fall, wie er in Fig. 1 gezeigt ist, verläuft die Krümmungslinie 12 wellenförmig. Die Krümmungslinie 12 setzt sich dabei aus vier Abschnitten al bis a4 zusammen. Der erste und zweite Abschnitt al, a2, die einen ersten Bereich bl bilden, ist hierbei jeweils bogenförmig nach oben gewölbt ausgebildet, wobei die beiden Abschnitte al, a2 der Krüm- mungslinie 12 an ihrer Verbindungsstelle 22 tangential ineinander übergehen. Der Bereich bl bildet hierbei einen kontinuierlichen Verlauf ohne einen Knick. Des Weiteren ist der dritte Abschnitt a3 ebenfalls bogenförmig ausgebildet, wobei er nach unten gewölbt ist, im Gegensatz zu dem ersten und zweiten Abschnitt al, a2. Der zweite und dritte Abschnitt a2, a3 gehen an ihrer Verbindungsstelle 22 ebenfalls tangential ineinander über, so dass der zweite Bereich b2, der aus dem zweiten und dritten Abschnitt a2, a3 gebildet wird, einen kontinuierlichen Verlauf aufweist. Entsprechendes gilt auch für den dritten Bereich b3. Dieser wird aus dem dritten Abschnitt a3 und einem vierten Abschnitt a4 gebildet, wobei beide Abschnitte a3, a4 bogenförmig ausgebildet sind und nach unten gewölbt sind. An ihrer Verbindungsstelle 22 gehen die beiden Abschnitte a3, a4 der Krümmungslinie 12 tangential in- einander über, d.h. der Bereich b3 weist einen kontinuierlichen Verlauf auf, ohne dass ein Knick am Übergang 22 der beiden Abschnitte a3, a4 entsteht. Alle drei Bereich bl bis b3 verlaufen oberhalb der X-Achse in dem Diagramm in Fig. 1, des Weiteren ist der erste bereich bl deutlich länger und stärker gewölbt als der dritte Bereich b3.In the present case, as shown in Fig. 1, the curvature line 12 is wavy. The curvature line 12 consists of four sections al to a4 together. The first and second sections a1, a2, which form a first area b1, are in each case arched upwards in a curved shape, wherein the two sections a1, a2 of the curve 12 merge tangentially into one another at their connection point 22. The area bl forms a continuous course without a kink. Furthermore, the third portion a3 is also arcuate, being curved downward, in contrast to the first and second portions al, a2. The second and third sections a2, a3 also merge tangentially into one another at their connection point 22, so that the second region b2, which is formed from the second and third sections a2, a3, has a continuous profile. The same applies to the third area b3. This is formed from the third section a3 and a fourth section a4, wherein both sections a3, a4 are arcuate and are curved downwards. At their junction 22, the two sections a3, a4 of the curvature line 12 merge tangentially into one another, ie the region b3 has a continuous course, without a kink being formed at the transition 22 between the two sections a3, a4. All three areas bl to b3 extend above the X axis in the diagram in FIG. 1, furthermore, the first area bl is significantly longer and more curved than the third area b3.
In der zweiten Ausführungsform einer Leitschaufel 10 gemäß dem Stand der Technik, wie sie in Fig. 2 gezeigt ist, setzt sich die Krümmungslinie 12 ebenfalls aus vier Abschnitten al bis a4 zusammen. Die Krümmungslinie 12 verläuft hierbei oberhalb der X-Achse und steigt hierbei zunächst in einem Bogen nach oben an, bevor sie zum anderen Ende hin langsam abfällt.In the second embodiment of a prior art vane 10, as shown in Fig. 2, the line of curvature 12 is also composed of four sections al to a4. The curvature line 12 in this case runs above the X axis and in this case initially rises in an arc upwards, before it slowly drops towards the other end.
Der erste Abschnitt al der Krümmungslinie 12 ist hierbei bo- genförmig nach unten gewölbt und der daran anschließende Abschnitt a2 bogenförmig nach oben. An ihrer Verbindungsstelle 22 gehen die beiden Abschnitte al und a2 tangential ineinander über, so dass der erste Bereich bl, der durch den ersten und zweiten Abschnitt al, a2 gebildet wird, einen kontinuierlichen Verlauf aufweist. Der zweite Bereich b2, der sich aus dem zweiten Abschnitt a2 und einem dritten Abschnitt a3 zusammensetzt, weist ebenfalls einen kontinuierlichen Verlauf auf. So ist der dritte Abschnitt a3 ebenfalls bogenförmig nach oben gewölbt, wobei er und der zweite Abschnitt a2 an ihrer Verbindungsstelle 22 tangential ineinander übergehen, ohne dass dabei ein Knick entsteht. Der dritte Bereich b3 der Krümmungslinie 12 wird aus dem dritten Abschnitt a3 und einem vierten Abschnitt a4 gebildet. Der vierte Abschnitt a4 ist dabei bogenförmig nach unten gewölbt, wobei der dritte und vierte Abschnitt a3, a4 an ihrer Verbindungsstelle 22 tangential ineinander übergehen.The first section al of the line of curvature 12 is arched downward in a downward arc and the adjoining section a2 is curved upward. At their junction 22, the two sections al and a2 tangentially merge into each other, so that the first area bl, by the first and second portion al, a2 has a continuous course. The second area b2, which is composed of the second section a2 and a third section a3, also has a continuous course. Thus, the third section a3 is also curved arcuately upwards, wherein he and the second section a2 at their junction 22 tangentially merge into each other, without causing a kink arises. The third region b3 of the curvature line 12 is formed from the third section a3 and a fourth section a4. In this case, the fourth section a4 is arched downward in an arc shape, with the third and fourth sections a3, a4 merging tangentially into one another at their connection point 22.
Weiter ist in Fig. 3 eine dritte Ausführungsform einer Leitschaufelform des Standes der Technik gezeigt. Die Leitschaufel 10 besteht dabei, wie in der ersten und zweiten Ausführungsform aus vier Abschnitten al bis a4. Dabei verläuft die Krümmungslinie 12 in einer Wellenform zunächst in einem Bogen oberhalb der X-Achse und dann in einem Bogen unterhalb der X- Achse .Further shown in Fig. 3 is a third embodiment of a prior art vane form. The guide vane 10 consists, as in the first and second embodiment of four sections al to a4. In this case, the curvature line 12 runs in a waveform initially in an arc above the X axis and then in an arc below the X axis.
Der erste und zweite Abschnitt al, a2 der Krümmungslinie 12 ist bogenförmig ausgebildet und verläuft nach oben gewölbt. An ihrer Verbindungsstelle 22 gehen die beiden ersten und zweiten Abschnitte al, a2 tangential ineinander über. Der zweite Bereich b2 der Krümmungslinie 12 wird durch den zweiten Abschnitt a2 und einen dritten Abschnitt a3 gebildet. Der dritte Abschnitt a3 ist ebenfalls bogenförmig ausgebildet und nach unten gewölbt. Die beiden Abschnitte a2 und a3 gehen an ihrer Verbindungsstelle 22 dabei tangential ineinander über, so dass kein scharfer Knick in diesem Bereich entsteht. Des Weiteren wird der vierte Bereich b4 durch den dritten Abschnitt a3 und einen vierten Abschnitt a4 gebildet. Der vier- te Abschnitt a4 ist ebenfalls bogenförmig nach unten gewölbt ausgebildet. Im Bereich ihrer Verbindungsstelle 22 gehen der dritte und vierte Abschnitt a3, a4 tangential ineinander ü- ber. Damit bilden die Bereiche bl bis b4 bzw. die Krümmungs- linie 12 insgesamt einen kontinuierlichen Verlauf, wie die beiden anderen zuvor beschriebenen Ausführungsformen einer Leitschaufel 10 gemäß dem Stand der Technik.The first and second sections al, a2 of the curvature line 12 is arcuate and extends upwardly curved. At their connection point 22, the two first and second sections al, a2 merge tangentially into one another. The second region b2 of the curvature line 12 is formed by the second section a2 and a third section a3. The third section a3 is also arcuate and curved downwards. The two sections a2 and a3 pass tangentially into one another at their connection point 22, so that no sharp kink occurs in this area. Furthermore, the fourth region b4 is formed by the third section a3 and a fourth section a4. The fourth section a4 is likewise arched in an arcuate manner. In the region of their connection point 22, the third and fourth sections a3, a4 merge tangentially into one another. Thus, the areas b1 to b4 or the curvature form Line 12 in total a continuous course, as the other two previously described embodiments of a guide vane 10 according to the prior art.
In Fig. 4 ist nun eine erste Ausführungsform einer Leitschaufel 10 gemäß der Erfindung gezeigt. Die Leitschaufel 10 besteht hierbei beispielsweise aus vier Abschnitten al bis a4. Ein erster Bereich, bestehend aus dem ersten und zweiten Abschnitt al, a2, weist dabei einen kontinuierlichen Verlauf auf. Der erste und zweite Abschnitt al, a2 ist hierbei bogenförmig ausgebildet und nach oben gewölbt. An ihrem Verbindungsabschnitt bzw. ihrer Verbindungsstelle 22 geht der erste Abschnitt al dabei tangential in den zweiten Abschnitt a2 ü- ber, so dass ein kontinuierlicher Verlauf entsteht ohne einen Knick. Ein zweiter Bereich b2 wird durch den zweiten Abschnitt a2 und einen dritten Abschnitt a3 gebildet, wobei der zweite und dritte Abschnitt a2, a3 jeweils bogenförmig ausgebildet sind und nach oben gewölbt sind. Dabei gehen die Abschnitte a2 und a3 an ihrem Verbindungspunkt 22 jedoch nicht tangential ineinander über sondern bilden einen Knick 24. Der zweite Bereich b2 bildet hierzu nicht wie im Stand der Technik einen kontinuierlichen Verlauf sondern einen diskontinuierlichen Verlauf bzw. weist einen scharfen Knick 24 an der Verbindungsstelle 22 der beiden Abschnitte a2, a3 auf. Der dritte Bereich b3 besteht aus dem dritten Abschnitt a3 und einem vierten Abschnitt a4 und bildet hierbei einen kontinuierlichen Verlauf. Der vierte Abschnitt a4 ist dabei bogenförmig ausgebildet und nach oben gewölbt. An ihrer Verbindungsstelle 22 gehen der dritte und vierte Abschnitt a3, a4 tangential ineinander über. Das bedeutet, dass in dem vorliegenden Beispiel, die Leitschaufel 10 einen Bereich b2 aufweist mit einem diskontinuierlichen Verlauf der Krümmungslinie 12, bei welchem der zweite und dritte Abschnitt a2, a3 an ihrer Verbindungsstelle 22 eine Art Knick 24 bilden bzw. nicht tangential ineinander übergehen. Die anderen Bereiche bl und b3 weisen dagegen einen kontinuierlichen Verlauf der Krümmungslinie 12 auf, ohne dass hierbei einer der Bereiche einen Knick ausbildet. Die Krümmungslinie 12 bildet im vorliegenden Fall zwei Bögen, einmal einen nach oben gewölbten Bogen aus den Abschnitten al und a2 und einen weiteren im Vergleich dazu sehr viel flacher gewölbten Bogen bestehend aus den Abschnitten a3 und a4. Beide Bögen bilden an ihrer Verbindungsstelle 22 den Knick 24.4, a first embodiment of a guide vane 10 according to the invention is shown. The guide vane 10 here consists for example of four sections al to a4. A first region, consisting of the first and second sections al, a2, has a continuous course. The first and second sections al, a2 is here arc-shaped and curved upwards. At its connection section or its connection point 22, the first section al passes tangentially into the second section a2, so that a continuous course is created without a kink. A second region b2 is formed by the second portion a2 and a third portion a3, wherein the second and third portions a2, a3 are each arcuate and are curved upward. However, the sections a2 and a3 do not tangentially merge into one another at their connection point 22 but form a kink 24. The second area b2 does not form a continuous course as in the prior art but has a discontinuous course or has a sharp kink 24 at the Junction 22 of the two sections a2, a3. The third area b3 consists of the third section a3 and a fourth section a4 and forms a continuous course. The fourth section a4 is arc-shaped and arched upwards. At their connection point 22, the third and fourth sections a3, a4 merge tangentially into one another. This means that in the present example, the guide vane 10 has a region b2 with a discontinuous course of the curvature line 12, in which the second and third sections a2, a3 at their junction 22 form a kind of kink 24 or not tangentially into each other. On the other hand, the other areas b1 and b3 have a continuous course of the curvature line 12, without one of the areas forming a bend. The curvature line 12 in the present case forms two arcs, once an upwardly arched arc of the sections al and a2 and another compared to a very much shallow arched arc consisting of the sections a3 and a4. Both bends form at their junction 22 the kink 24th
Des Weiteren ist in Fig. 5 eine zweite Ausführungsform einer erfindungsgemäßen Leitschaufel 10 dargestellt. Die Krümmungs- linie 12 der Leitschaufel 10 besteht dabei aus vier Abschnitten al bis a4. Der erste und zweite Abschnitt al, a2 ist dabei bogenförmig ausgebildet und nach oben gewölbt. An ihrer Verbindungsstelle 22 gehend der erste und zweite Abschnitt al, a2 tangential ineinander über, so dass der Bereich bl, der aus den beiden Abschnitten al, a2 gebildet wird, einen kontinuierlichen Verlauf aufweist. Der zweite Bereich b2 wird aus dem zweiten Abschnitt a2 und einem dritten Abschnitt a3 gebildet, wobei der dritte Abschnitt a3 ebenfalls nach oben gewölbt ist. Die beiden Abschnitt a2, a3 gehen jedoch an ih- rer Verbindungsstelle 22 nicht tangential ineinander über, sondern bilden eine Art Knick 24, wie in Fig. 5 gezeigt ist. Damit weist der zweite Bereich b2 einen diskontinuierlichen Verlauf auf. Der dritte Bereich b3, der aus dem dritten Abschnitt a3 und einem vierten Abschnitt a4 gebildet wird weist wiederum einen kontinuierlichen Verlauf auf. Die beiden dritten und vierten Abschnitte a3, a4 sind hierbei bogenförmig ausgebildet und nach oben gewölbt. An ihrer Verbindungsstelle 22 gehen sie tangential ineinander über. Damit weist die Krümmungslinie 12 der erfindungsgemäßen Leitschaufel 10 zu- mindest in dem Bereich b2 einen diskontinuierlichen verlauf auf, während die beiden anderen Bereiche bl und b3 einen kontinuierlichen Verlauf ohne Knickbildung aufweisen. Im Gegensatz zu der ersten Ausführungsform der Erfindung ist bei der zweiten Ausführungsform der Erfindung der erste Bereich bl länger ausgebildet, bzw. der aus den Abschnitten al und a2 gespannt Bogen. Der dritte Bereich b3, bzw. der aus den Abschnitten a3 und a4 gespannte Bogen ist dafür in der zweiten Ausführungsform kürzer als wie in der ersten Ausführungsform. Obwohl die vorliegende Erfindung vorstehend anhand zweier bevorzugter Ausführungsbeispiele beschrieben wurde, ist sie darauf nicht beschränkt, sondern auf vielfältige Art und Wei- se modifizierbar. Insbesondere ist auch denkbar, dass statt bogenförmiger Abschnitte auch Abschnitte mit beispielsweise einer geraden Form (nicht dargestellt) miteinander und/oder mit den bogenförmigen Abschnitten kombiniert werden, je nach beispielsweise anzustrebendem Strömungsprofil der jeweiligen Leitschaufel. Des Weiteren kann eine Leitschaufel wenigstens einen Bereich bestehend aus zwei Abschnitten aufweisen oder eine Vielzahl von Bereichen bzw. Abschnitten, beispielsweise zwei, drei, vier, fünf, sechs und mehr Bereiche bzw. Abschnitte. Dabei können Abschnitte mit einer beliebigen Form, Anordnung und/oder Dimensionierung miteinander kombiniert werden. Entsprechendes gilt auch für die Bereiche, die aus den Abschnitten gebildet werden. In den beiden erfindungsgemäßen Ausführungsformen, wie sie in den Fig. 4 und 5 gezeigt sind, sind die Bereiche bl bis b3 jeweils im Wesentlichen o- berhalb der X-Achse in den Diagrammen angeordnet. Grundsätzlich können die Bereiche bzw. Abschnitte der Krümmungslinie 12 beliebig verlaufen, beispielsweise zumindest teilweise unterhalb der X-Achse, wie zum Beispiel in Fig. 3 mit Bezug auf den Stand der Technik dargestellt ist. Wahlweise können die Bereiche bzw. Abschnitte der Krümmungslinie 12 auch vollständig unterhalb oder zum Teil auf der X-Achse verlaufen. Des Weiteren können gerade und bogenförmige Abschnitte bei der Krümmungslinie 12 einer Leitschaufel 10 beliebig variiert werden. Grundsätzlich kann die Leitschaufel 10 hierbei we- nigstens einen Knick 24 oder eine Vielzahl von Knicken 24 aufweisen bzw. Stellen an welchen die einzelnen Kurvenstücke der Krümmungslinie 12 nicht tangential ineinander übergehen. Beispielsweise kann die Krümmungslinie 12 eins, zwei, drei, vier und mehr dieser sog. Knicke 24 bzw. nicht tangentialen Übergänge aufweisen, wobei die Knicke 24 an beliebigen Positionen der Krümmungslinie 12 vorgesehen werden können je nach Funktion bzw. Einsatzzweck. Furthermore, a second embodiment of a guide blade 10 according to the invention is shown in FIG. 5. The curvature line 12 of the guide vane 10 consists of four sections al to a4. The first and second sections al, a2 is arc-shaped and arched upwards. At their connection point 22, the first and second sections al, a2 merge tangentially into one another, so that the area b1, which is formed from the two sections al, a2, has a continuous course. The second region b2 is formed from the second portion a2 and a third portion a3, wherein the third portion a3 is also curved upwards. However, the two sections a2, a3 do not merge tangentially into one another at their connection point 22, but form a kind of kink 24, as shown in FIG. Thus, the second area b2 has a discontinuous course. The third region b3, which is formed from the third section a3 and a fourth section a4, again has a continuous course. The two third and fourth sections a3, a4 are here arc-shaped and curved upwards. At their junction 22 they go tangentially into each other. Thus, the curvature line 12 of the guide vane 10 according to the invention has a discontinuous course at least in the region b2, while the two other regions b1 and b3 have a continuous course without buckling. In contrast to the first embodiment of the invention, in the second embodiment of the invention, the first area bl is formed longer, or the stretched from the sections al and a2 arch. The third area b3, or the arc stretched from the sections a3 and a4, is shorter in the second embodiment than in the first embodiment. Although the present invention has been described above with reference to two preferred embodiments, it is not limited thereto, but modifiable in many ways. In particular, it is also conceivable that instead of arcuate sections also sections with, for example, a straight shape (not shown) are combined with each other and / or with the arcuate sections, depending on, for example angezustrebendem flow profile of the respective vane. Furthermore, a guide vane may comprise at least one region consisting of two sections or a plurality of sections, for example two, three, four, five, six and more sections. In this case, sections having an arbitrary shape, arrangement and / or dimensioning can be combined with one another. The same applies to the areas that are formed from the sections. In the two embodiments according to the invention, as shown in FIGS. 4 and 5, the areas b 1 to b 3 are each arranged substantially above the x-axis in the diagrams. In principle, the regions or sections of the curvature line 12 can run as desired, for example at least partially below the X axis, as is illustrated, for example, in FIG. 3 with reference to the prior art. Optionally, the portions of the line of curvature 12 may also extend entirely below or partially along the X-axis. Furthermore, straight and arcuate portions at the curve line 12 of a vane 10 can be varied as desired. In principle, the guide blade 10 can have at least one kink 24 or a plurality of kinks 24 or points at which the individual curve pieces of the curve line 12 do not merge tangentially into one another. For example, the curvature line 12 can have one, two, three, four or more of these so-called kinks 24 or non-tangential transitions, wherein the kinks 24 can be provided at arbitrary positions of the curvature line 12, depending on the function or intended use.

Claims

Patentansprüche claims
1. Leitschaufel (10), insbesondere für einen Turbolader, wobei die Krümmungslinie (12) der Leitschaufel (10) wenigstens einen oder mehrere Bereiche (bl, b2, b3) mit einem diskontinuierlichen Verlauf aufweist.1. vane (10), in particular for a turbocharger, wherein the curvature line (12) of the vane (10) has at least one or more areas (bl, b2, b3) with a discontinuous course.
2. Leitschaufel nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass die Krümmungslinie (12) wenigstens einen Bereich (b2) mit zwei Abschnitten (a2, a3) aufweist, die miteinander verbunden sind, wobei die beiden Abschnitte (a2, a3) an ihrer Verbindungsstelle (22) diskontinuierlich bzw. nicht tangential ineinander übergehen.2. Guide vane according to claim 1, characterized in that the curvature line (12) at least one region (b2) with two sections (a2, a3), which are interconnected, wherein the two sections (a2, a3) at its connection point (22 ) discontinuously or not tangentially into each other.
3. Leitschaufel nach wenigstens einem der Ansprüche 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , dass die Krümmungslinie (12) wenigstens einen Bereich (bl, b3) mit zwei Abschnitten (al, a2; a3, a4) aufweist, die mit- einander verbunden sind, wobei die beiden Abschnitte (al, a2; a3, a4) an ihrer Verbindungsstelle (22) kontinuierlich bzw. tangential ineinander übergehen.3. Guide vane according to at least one of claims 1 or 2, characterized in that the curvature line (12) at least a region (bl, b3) with two sections (al, a2; a3, a4), which are connected to each other the two sections (al, a2, a3, a4) merge into one another continuously or tangentially at their connection point (22).
4. Leitschaufel nach wenigstens einem der Ansprüche 2 oder 3, d a d u r c h g e k e n n z e i c h n e t , dass wenigstens einer, mehrere oder alle Abschnitte (al, a2, a3, a4) jeweils dieselbe oder eine unterschiedliche Form und/oder Dimensionierung aufweisen.4. A vane according to claim 2, wherein at least one, several or all sections (a1, a2, a3, a4) each have the same or a different shape and / or dimensioning.
5. Leitschaufel nach wenigstens einem der Ansprüche 2 bis 4, d a d u r c h g e k e n n z e i c h n e t , dass wenigsten einer, mehrere oder alle Bereiche (bl, b2, b3) jeweils dieselbe oder eine unterschiedliche Form und/oder Dimensionierung aufweisen.5. The guide vane according to claim 2, wherein at least one, several or all regions (b1, b2, b3) each have the same or a different shape and / or dimensioning.
6. Leitschaufel nach wenigstens einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , dass die Leitschaufel (10) aus vier Abschnitten (al, a2, a3, a4) besteht, wobei der erste Abschnitt (al) und der zweite Abschnitt (a2) den ersten Bereich (bl) bilden, wobei beide Abschnitte (al, a2) an ihrer Verbindungsstelle (22) kontinuierlich ineinander übergehen, wobei ein zweiter Bereich (b2) durch den zweiten Abschnitt (a2) und einen dritten Abschnitt (a3) gebildet wird, wobei der zweite und dritte Abschnitt (a2, a3) an ihrer Verbindungsstelle (22) diskontinuierlich ineinander übergehen bzw. einen Knick (24) bilden und wobei ein dritte Bereich (b3) durch den dritten Abschnitt (a3) und einen vierten Abschnitt (a4) gebildet wird und der dritte und vierte Abschnitt (a3, a4) an ihrer Verbindungsstelle (22) kontinuierlich ineinander übergehen.Guide vane according to at least one of claims 1 to 5, characterized in that the vane (10) consists of four sections (al, a2, a3, a4), wherein the first section (al) and the second section (a2) form the first area (bl), wherein both sections (al, a2) merge into one another continuously at their connection point (22), a second area (b2 ) is formed by the second portion (a2) and a third portion (a3), wherein the second and third portion (a2, a3) at their junction (22) intermittently merge into one another or form a kink (24) and wherein a third Area (b3) by the third portion (a3) and a fourth portion (a4) is formed and the third and fourth portion (a3, a4) at its junction (22) continuously merge into one another.
7. Leitschaufel nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t , dass der erste und dritte Bereich (bl, b3) jeweils nach oben oder nach unten gewölbt sind oder einer der Bereiche (bl, b3) nach oben und der andere nach unten gewölbt ist.7. The guide vane of claim 6, wherein the first and third regions are curved upwards or downwards, or one of the regions is bent upwards and the other is curved downwards.
8. Leitschaufel nach wenigstens einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , dass ein oder beide Abschnitte (al, a2, a3, a4) eines Bereichs (bl, b2, b3) beispielsweise bogenförmig oder gerade ausgebildet sind und nach oben oder unten gewölbt bzw. ge- richtet sind.8. Guide vane according to claim 1, characterized in that one or both sections (a1, a2, a3, a4) of a region (b1, b2, b3) are, for example, arcuate or straight and curved upwards or downwards or downwards are directed.
9. Turbolader mit einer variablen Turbinengeometrie, wobei die variable Turbinengeometrie wenigstens eine oder mehrere Leitschaufeln (10) gemäß wenigstens einem der Ansprüche 1 bis 8 aufweist.9. A turbocharger with a variable turbine geometry, wherein the variable turbine geometry comprises at least one or more vanes (10) according to at least one of claims 1 to 8.
10. Turbolader nach Anspruch 9, d a d u r c h g e k e n n z e i c h n e t , dass wenigstens eine mehrere oder alle Leitschaufeln (10) der variablen Turbinengeometrie die gleiche oder eine unterschiedliche Form aufweisen. 10. A turbocharger as claimed in claim 9, wherein at least one of a plurality or all vanes of the variable turbine geometry has the same or a different shape.
EP08869779.2A 2008-01-11 2008-10-28 Adjustable guide vane of a turbine of a turbocharger Active EP2245275B1 (en)

Applications Claiming Priority (2)

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DE102008004014A DE102008004014A1 (en) 2008-01-11 2008-01-11 Guide vane for a variable turbine geometry
PCT/EP2008/064594 WO2009086959A1 (en) 2008-01-11 2008-10-28 Guide vane for a variable turbine geometry

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EP2245275A1 true EP2245275A1 (en) 2010-11-03
EP2245275B1 EP2245275B1 (en) 2015-04-08

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EP (1) EP2245275B1 (en)
JP (2) JP2011509371A (en)
KR (1) KR20100110867A (en)
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WO (1) WO2009086959A1 (en)

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JP2011509371A (en) 2011-03-24
CN101910565B (en) 2014-06-11
KR20100110867A (en) 2010-10-13
EP2245275B1 (en) 2015-04-08
JP5701352B2 (en) 2015-04-15
US20100296924A1 (en) 2010-11-25
WO2009086959A1 (en) 2009-07-16
DE102008004014A1 (en) 2009-07-23
JP2013238249A (en) 2013-11-28
CN101910565A (en) 2010-12-08

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