EP2165077A1 - Air supplier, particularly for an air supply system for fuel cells - Google Patents

Air supplier, particularly for an air supply system for fuel cells

Info

Publication number
EP2165077A1
EP2165077A1 EP08759017A EP08759017A EP2165077A1 EP 2165077 A1 EP2165077 A1 EP 2165077A1 EP 08759017 A EP08759017 A EP 08759017A EP 08759017 A EP08759017 A EP 08759017A EP 2165077 A1 EP2165077 A1 EP 2165077A1
Authority
EP
European Patent Office
Prior art keywords
air
air supplier
axial
compressor
supplier
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Withdrawn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
EP08759017A
Other languages
German (de)
French (fr)
Inventor
Paul Löffler
Manfred Stute
Siegfried Sumser
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.)
Mercedes Benz Group AG
Original Assignee
Daimler 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 Daimler AG filed Critical Daimler AG
Publication of EP2165077A1 publication Critical patent/EP2165077A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
    • 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
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers

Definitions

  • Air supplier in particular for an air supply system of
  • the invention relates to an air supplier with a compressor with a radial diffuser, in particular for powered by an electric motor air supply systems of fuel cells or exhaust gas turbocharger in internal combustion engines.
  • Air supplier of the type mentioned are known in the art and are used to supply air to fuel cells, in particular a fuel cell stack and have a driven by an electric motor flow compressor with a compressor and a radial diffuser.
  • an air supplier with a compressor is also known, which is designed as an axial compressor.
  • the object of the invention is to provide an improved air supplier with a space-saving design.
  • the air supplier according to the invention which is used in particular for powered ⁇ means of an electric motor air supply systems of fuel cells or turbocharger for internal combustion engines, has, in addition to a compressor with a radial diffuser to a connected thereto deflecting channel which opens into an axial annular chamber to which a collecting coil is arranged, which runs inwards, ie in the direction of the axis of rotation.
  • a compressor with a radial diffuser to a connected thereto deflecting channel which opens into an axial annular chamber to which a collecting coil is arranged, which runs inwards, ie in the direction of the axis of rotation.
  • the axial annular space could also be designed as an unscreened diffuser, in that the inner contour of the axial channel conically opens the flow cross section along the flow direction.
  • the invention will be explained in more detail below with reference to exemplary ⁇ examples.
  • FIG. 1 shows a first detail of a first embodiment of an air supplier according to the invention in a sectional view
  • Fig. 2 shows a second section of this embodiment
  • Fig. 3 is a perspective view of a part of an air supplier according to the invention.
  • the first section shows only one half of the air supplier L, in particular the above the longitudinal axis extending upper half of the air supplier L.
  • the compressor 1 comprises a compressor wheel 1.1, which is arranged rotatably about a rotation axis 1.2.
  • a radial diffuser 2 is arranged, which is bounded by two parallel side surfaces.
  • the radial diffuser 2 is variably adjustable by one of the side surfaces is adjustable.
  • the radial diffuser 2 is connected via a deflecting channel 3 with an axial annular space 4, which in turn in a Spi Rale 5 (also called collecting spiral) opens, which is designed directed inwardly to the axis of rotation 1.2, so that the available space within the configuredwan ⁇ tion of the compressor 1 is utilized.
  • the direction of the air intake is shown by the arrow Pl shown on the right.
  • Air is drawn in through the compressor wheel 1.1 and conveyed into the radial diffuser 2, in which a radial blading 2.1 is arranged.
  • the air is conveyed to the outside and thereby delayed due to the outwardly increasing radial extent.
  • the transported air is deflected by 90 degrees in the axial annular space 4.
  • the axial annular space 4 is designed as a parallel-walled diffuser (also called an axial diffuser) in which an axial blading 4.1 is arranged. Since the axial annular space 4 is parallel-walled, the transported air, which is axially directed by the axial blading 4.1, experiences a further delay. At the transition between the axial annular space 4 and spiral 5, the transported air is conveyed over the entire circumference of the axial annular space 4 in the spiral 5, where it undergoes a directional component in the circumferential direction by flow superposition and flows through an outlet 5.1.
  • the spiral 5 is formed similar to a turn of a snail shell.
  • the spiral 5 has a substantially constant wall thickness. This will cause the heat flow over the resulting air gap from the spiral area in the entry or Radau tokontur Complex difficult.
  • FIG. 2 shows a larger section with the Invention ⁇ modern apparatus, the compressor 1 with the coil 5 as shown in the above-described figure 1 only up to the rotational axis 1.2.
  • the compressor 1 shown on the left is driven by an electric motor 6, wherein the outer diameter of the compressor 1 is not greater than the diameter of the outer wall 6.1 of the electric motor 6.
  • the inventive design of the air supplier L it is possible, the outer diameter of the compressor 1 as small as to keep the diameter of the outer wall 6.1 of the electric motor 6.
  • the space requirement of the air supplier L is much smaller than in air suppliers according to the prior art, in which due to large wheel diameter and large radial diffusers with subsequent compressor spiral diameter are common, which are significantly larger than the diameter of conventional driving electric motors.
  • the air supplier L according to the invention thus enables placement in very limited installation spaces of the vehicle application.
  • the air flow generated by the compressor 1 is supplied to a fuel cell 7 or a fuel cell stack shown schematically in the upper area of FIG.
  • a Umblaseventil 8 is arranged, which is controlled by a controller 9.
  • the air supply system of the fuel cell 7 shown in this figure 2 is equipped with a designed as an expansion turbine turbine 10, in particular a Varioturbine.
  • the efficiency of the compressor blowdown is improved by the expansion of the blow-off flow in the turbine 10. Since compressor 1 are designed for fuel cell 7 with low specific speeds and thereby have relatively small diameter ratios from Radeintritt to Radaustritt, the space ⁇ requirement for large spiral cross sections can be very well satisfied in the air supplier L according to the invention.
  • the Axialbeschaufelonne 4.1 which are arranged in the axial annular space 4, shown.
  • the Axialbeschaufelonne 4.1 serve to retard the air flow diverted from the radial diffuser 2 in the axial annulus 4 in the axial direction as possible vortex free.
  • the diameter of the spiral 5 increases from the upper region of the illustrated compressor in the circumferential direction to the exit 5.1 of the spiral 5.
  • the air supplier L instead of for a fuel cell air supply for the supercharging of internal combustion engines, although compressors of exhaust gas turbochargers have significantly higher specific rotational speeds than electric motors for the fuel cell air supply.
  • the radial nozzle area forms in this case optionally the variable element for adjusting the flow cross-section.

Landscapes

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

Abstract

The invention relates to an air supplier (L) having a compressor (1) having a radial diffuser (2), particularly for air supply systems for fuel cells (7) operated by means of an electric motor (6). In the air supplier (L) according to the invention, a diverting channel (3) is connected to the radial diffuser (2) that empties into an axial annular chamber (4) on which a coil (5) is disposed that runs inwards.

Description

Luftversorger, insbesondere für ein Luftversorgungssystem vonAir supplier, in particular for an air supply system of
Brennstoffzellenfuel cells
Die Erfindung betrifft einen Luftversorger mit einem Verdichter mit einem Radialdiffusor, insbesondere für mittels eines Elektromotors betriebene Luftversorgungssysteme von Brennstoffzellen oder Abgasturbolader bei Verbrennungsmotoren.The invention relates to an air supplier with a compressor with a radial diffuser, in particular for powered by an electric motor air supply systems of fuel cells or exhaust gas turbocharger in internal combustion engines.
Luftversorger der eingangs genannten Art sind im Stand der Technik bekannt und dienen zur Luftversorgung von Brennstoffzellen, insbesondere eines BrennstoffZellenstapels und weisen einen von einem Elektromotor betriebenen Strömungsverdichter mit einem Verdichterrad und einem Radialdiffusor auf.Air supplier of the type mentioned are known in the art and are used to supply air to fuel cells, in particular a fuel cell stack and have a driven by an electric motor flow compressor with a compressor and a radial diffuser.
Nach DE 1 628 280 ist zudem ein Luftversorger mit einem Verdichter bekannt, der als Axialverdichter ausgebildet ist.According to DE 1 628 280 an air supplier with a compressor is also known, which is designed as an axial compressor.
Nachteilig ist bei den vorgenannten Luftversorgern der aus deren Bauart resultierende hohe Platzbedarf.A disadvantage of the aforementioned air suppliers of their design resulting high space requirements.
Die Aufgabe der Erfindung besteht darin, einen verbesserten Luftversorger mit einer Platz sparenden Bauart anzugeben.The object of the invention is to provide an improved air supplier with a space-saving design.
Die Lösung der Aufgabe gelingt erfindungsgemäß durch Luftversorger mit der Merkmalskombination gemäß Anspruch 1. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der abhängigen Ansprüche.The object is achieved according to the invention by air suppliers with the feature combination according to claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.
Der erfindungsgemäße Luftversorger, der insbesondere für mit¬ tels eines Elektromotors betriebene Luftversorgungssysteme von Brennstoffzellen oder Abgasturbolader bei Verbrennungsmotoren verwendet wird, weist neben einem Verdichter mit einem Radialdiffusor einen daran angeschlossenen Umlenkkanal auf, der in einen axialen Ringraum mündet, an den eine Sammelspirale angeordnet ist, die nach innen, also in Richtung der Rotationsachse, verläuft. Dadurch gelingt eine besonders kompakte Bauweise; insbesondere wird durch die erfindungsgemäße Ausbildung der Sammelspirale der Raum zwischen axialem Ringraum und Rotationsachse ausgefüllt und genutzt, so dass die Außenwandung der Verdichters so ausgebildet werden kann, dass deren Außendurchmesser nicht größer ist als der Außendurchmesser des Elektromotors.The air supplier according to the invention, which is used in particular for powered ¬ means of an electric motor air supply systems of fuel cells or turbocharger for internal combustion engines, has, in addition to a compressor with a radial diffuser to a connected thereto deflecting channel which opens into an axial annular chamber to which a collecting coil is arranged, which runs inwards, ie in the direction of the axis of rotation. This creates a particularly compact design; In particular, the space between the axial annulus and the axis of rotation is filled and used by the inventive design of the collecting spiral, so that the outer wall of the compressor can be designed so that the outer diameter is not greater than the outer diameter of the electric motor.
Besonders vorteilhaft ist die Anordnung eines beschaufelten Axialdiffusors im axialen Ringraum. Dadurch gelingt eine Erhöhung der Effizienz des Luftversorgers . Die unter Vordrall stehende Eintrittsströmung in die Axiale wird zur maximal möglichen Strömungsverzögerung ausgerichtet. Durch die Aufteilung der Gesamtströmungsverzögerung im Radialdiffusor und im Axialdiffusor ergibt sich ein zusätzlicher Freiheitsgrad zur Optimierung der Strömungsverzögerung.Particularly advantageous is the arrangement of a bladed axial diffuser in the axial annulus. This succeeds in increasing the efficiency of the air supplier. The inlet flow into the axial under pre-twist is aligned with the maximum possible flow delay. By dividing the total flow delay in the radial diffuser and in the axial diffuser there is an additional degree of freedom for optimizing the flow delay.
Alternativ dazu könnte der axiale Ringraum auch als unbe- schaufelter Diffusor ausgebildet sein, indem die Innenkontur des Axialkanals konisch den Strömungsquerschnitt längs der Strömungsrichtung öffnet. Die Erfindung wird im Folgenden anhand von Ausführungs¬ beispielen näher erläutert.Alternatively, the axial annular space could also be designed as an unscreened diffuser, in that the inner contour of the axial channel conically opens the flow cross section along the flow direction. The invention will be explained in more detail below with reference to exemplary ¬ examples.
Dabei zeigen:Showing:
Fig. 1 einen ersten Ausschnitt einer ersten Ausführungsform eines erfindungsgemäßen Luftversorgers in Schnittdarstellung,1 shows a first detail of a first embodiment of an air supplier according to the invention in a sectional view,
Fig. 2 einen zweiten Ausschnitt dieser Ausführungsform undFig. 2 shows a second section of this embodiment and
Fig. 3 eine perspektivische Ansicht eines Teils eines erfindungsgemäßen Luftversorgers .Fig. 3 is a perspective view of a part of an air supplier according to the invention.
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.
Bei dem in Figur 1 gezeigten ersten Ausschnitt einer ersten Ausführungsform des erfindungsgemäßen Luftversorgers L sind die wesentlichen Elemente eines Verdichters 1 dargestellt. Dabei zeigt der erste Ausschnitt nur eine Hälfte des Luftversorgers L, insbesondere die oberhalb der Längsachse verlaufende obere Hälfte des Luftversorgers L.In the first detail of a first embodiment of the air supplier L according to the invention shown in Figure 1, the essential elements of a compressor 1 are shown. In this case, the first section shows only one half of the air supplier L, in particular the above the longitudinal axis extending upper half of the air supplier L.
Der Verdichter 1 umfasst ein Verdichterrad 1.1, dass drehbar um eine Rotationsachse 1.2 angeordnet ist. In radialer Richtung außerhalb des Verdichterrads 1.1 ist ein Radialdiffu- sor 2 angeordnet, der von zwei parallelen Seitenflächen begrenzt ist. Der Radialdiffusor 2 ist variabel einstellbar, indem eine der Seitenflächen verstellbar ausgebildet ist. Der Radialdiffusor 2 ist über einen Umlenkkanal 3 mit einem axialen Ringraum 4 verbunden, welcher wiederum in eine Spi- rale 5 (auch Sammelspirale genannt) mündet, die nach innen zur Rotationsachse 1.2 gerichtet ausgebildet ist, so dass der zur Verfügung stehende Bauraum innerhalb der Außenwan¬ dung des Verdichters 1 ausgenutzt ist. Die Richtung der Luftansaugung ist durch den rechts dargestellten Pfeil Pl gezeigt.The compressor 1 comprises a compressor wheel 1.1, which is arranged rotatably about a rotation axis 1.2. In the radial direction outside the compressor wheel 1.1, a radial diffuser 2 is arranged, which is bounded by two parallel side surfaces. The radial diffuser 2 is variably adjustable by one of the side surfaces is adjustable. The radial diffuser 2 is connected via a deflecting channel 3 with an axial annular space 4, which in turn in a Spi Rale 5 (also called collecting spiral) opens, which is designed directed inwardly to the axis of rotation 1.2, so that the available space within the Außenwan ¬ tion of the compressor 1 is utilized. The direction of the air intake is shown by the arrow Pl shown on the right.
Durch das Verdichterrad 1.1 wird Luft angesaugt und in den Radialdiffusor 2, in welchem eine Radialbeschaufelung 2.1 angeordnet ist, befördert. Im Radialdiffusor 2 wird die Luft nach außen befördert und dabei in Folge des sich nach außen vergrößernden Radialumfangs verzögert. Im Umlenkkanal 3 wird die beförderte Luft um 90 Grad in den axialen Ringraum 4 umgelenkt.Air is drawn in through the compressor wheel 1.1 and conveyed into the radial diffuser 2, in which a radial blading 2.1 is arranged. In the radial diffuser 2, the air is conveyed to the outside and thereby delayed due to the outwardly increasing radial extent. In the deflection channel 3, the transported air is deflected by 90 degrees in the axial annular space 4.
Der axiale Ringraum 4 ist im Ausführungsbeispiel als paral- lelwandiger Diffusor (auch Axialdiffusor genannt) ausgebildet, in welchem eine Axialbeschaufelung 4.1 angeordnet ist. Da der axiale Ringraum 4 parallelwandig ausgebildet ist, erfährt die beförderte Luft, die durch die Axialbeschaufelung 4.1 axial gerichtet wird, eine weitere Verzögerung. Am Übergang zwischen axialem Ringraum 4 und Spirale 5 wird die beförderte Luft über den gesamten Umfang des axialen Ringraums 4 in die Spirale 5 befördert, wo sie durch Strömungsüberlagerung eine Richtungskomponente in Umfangsrichtung erfährt und über einen Austritt 5.1 ausströmt. Die Spirale 5 ist ähnlich einer Windung eines Schneckenhauses ausgebildet.In the exemplary embodiment, the axial annular space 4 is designed as a parallel-walled diffuser (also called an axial diffuser) in which an axial blading 4.1 is arranged. Since the axial annular space 4 is parallel-walled, the transported air, which is axially directed by the axial blading 4.1, experiences a further delay. At the transition between the axial annular space 4 and spiral 5, the transported air is conveyed over the entire circumference of the axial annular space 4 in the spiral 5, where it undergoes a directional component in the circumferential direction by flow superposition and flows through an outlet 5.1. The spiral 5 is formed similar to a turn of a snail shell.
Die Spirale 5 weist eine weitgehend konstante Wanddicke auf. Dadurch wird der Wärmefluss über den sich ergebenden Luft spalt aus dem Spiralenbereich in den Eintritts- bzw. Radaußenkonturbereich erschwert.The spiral 5 has a substantially constant wall thickness. This will cause the heat flow over the resulting air gap from the spiral area in the entry or Radaußenkonturbereich difficult.
Figur 2 zeigt einen größeren Ausschnitt mit der erfindungs¬ gemäßen Vorrichtung, wobei der Verdichter 1 mit der Spirale 5 wie in der vorab beschriebenen Figur 1 nur bis zur Rotationsachse 1.2 dargestellt ist. Der links dargestellte Verdichter 1 wird von einem Elektromotor 6 angetrieben, wobei der Außendurchmesser des Verdichters 1 nicht größer ist als der Durchmesser der Außenwandung 6.1 des Elektromotors 6. Durch den erfindungsgemäßen Aufbau des Luftversorgers L ist es möglich, den Außendurchmesser des Verdichters 1 so klein wie den Durchmesser der Außenwandung 6.1 des Elektromotors 6 zu halten. Damit ist der Bauraumbedarf des Luftversorgers L deutlich kleiner als bei Luftversorgern nach dem Stand der Technik, bei denen in Folge großer Raddurchmesser und großer Radialdiffusoren mit nachfolgender Verdichterspirale Durchmesser üblich sind, die deutlich größer sind, als Durchmesser üblicher antreibender Elektromotoren. Der erfindungsgemäße Luftversorger L ermöglicht dadurch eine Platzierung in stark begrenzten Bauräumen der Fahrzeuganwendung. Der vom Verdichter 1 erzeugte Luftstrom wird einer im oberen Bereich der Figur 2 schematisch dargestellten Brennstoffzelle 7 oder einem Brennstoffzellenstapel zugeführt. Zur Regulierung des Luftstroms ist ein Umblaseventil 8 angeordnet, das von einem Regler 9 geregelt wird. Das in dieser Figur 2 gezeigte Luftversorgungssystem der Brennstoffzelle 7 ist mit einer als Expansionsturbine ausgestalten Turbine 10, insbesondere eine Varioturbine ausgestattet. Dadurch wird der Wirkungsgrad der Verdichterabblasung durch die Expansion des Abblasestroms in der Turbine 10 verbessert. Da Verdichter 1 für Brennstoffzellen 7 mit niederen spezifischen Drehzahlen ausgelegt werden und dadurch relativ kleine Durchmesserverhältnisse vom Radeintritt zum Radaustritt haben, kann beim erfindungsgemäßen Luftversorger L der Platz¬ bedarf für große Spiralenquerschnitte sehr gut befriedigt werden.Figure 2 shows a larger section with the Invention ¬ modern apparatus, the compressor 1 with the coil 5 as shown in the above-described figure 1 only up to the rotational axis 1.2. The compressor 1 shown on the left is driven by an electric motor 6, wherein the outer diameter of the compressor 1 is not greater than the diameter of the outer wall 6.1 of the electric motor 6. The inventive design of the air supplier L, it is possible, the outer diameter of the compressor 1 as small as to keep the diameter of the outer wall 6.1 of the electric motor 6. Thus, the space requirement of the air supplier L is much smaller than in air suppliers according to the prior art, in which due to large wheel diameter and large radial diffusers with subsequent compressor spiral diameter are common, which are significantly larger than the diameter of conventional driving electric motors. The air supplier L according to the invention thus enables placement in very limited installation spaces of the vehicle application. The air flow generated by the compressor 1 is supplied to a fuel cell 7 or a fuel cell stack shown schematically in the upper area of FIG. To regulate the air flow, a Umblaseventil 8 is arranged, which is controlled by a controller 9. The air supply system of the fuel cell 7 shown in this figure 2 is equipped with a designed as an expansion turbine turbine 10, in particular a Varioturbine. As a result, the efficiency of the compressor blowdown is improved by the expansion of the blow-off flow in the turbine 10. Since compressor 1 are designed for fuel cell 7 with low specific speeds and thereby have relatively small diameter ratios from Radeintritt to Radaustritt, the space ¬ requirement for large spiral cross sections can be very well satisfied in the air supplier L according to the invention.
Als vorteilhaft hat sich herausgestellt, den erfindungsgemäßen Luftversorger L mit einem so genannten Bereich "TRIM" kleiner 40 Prozent auszubilden, wobei "TRIM" gleich dem Quadrat des Quotienten aus Durchmesser der Lufteintrittsöffnung und dem Durchmesser des Verdichterrads 1 ist.It has proven to be advantageous to design the air supplier L according to the invention with a so-called "TRIM" range of less than 40 percent, where "TRIM" is equal to the square of the quotient of the diameter of the air inlet opening and the diameter of the compressor wheel 1.
Bei der in Figur 3 dargestellten perspektivischen Ansicht eines Teils des erfindungsgemäßen Luftversorgers L sind die Axialbeschaufelungen 4.1, die im axialen Ringraum 4 angeordnet sind, gezeigt. Die Axialbeschaufelungen 4.1 dienen dazu, den aus dem Radialdiffusor 2 in den axialen Ringraum 4 umgeleiteten Luftstrom in axialer Richtung möglichst verwirbe- lungsfrei zu verzögern. Der Durchmesser der Spirale 5 nimmt von dem oberen Bereich des dargestellten Verdichters in Um- fangsrichtung bis zum Austritt 5.1 der Spirale 5 zu.In the perspective view of a part of the air supplier L according to the invention shown in Figure 3, the Axialbeschaufelungen 4.1, which are arranged in the axial annular space 4, shown. The Axialbeschaufelungen 4.1 serve to retard the air flow diverted from the radial diffuser 2 in the axial annulus 4 in the axial direction as possible vortex free. The diameter of the spiral 5 increases from the upper region of the illustrated compressor in the circumferential direction to the exit 5.1 of the spiral 5.
Es ist auch möglich, den erfindungsgemäßen Luftversorger L anstatt für eine Brennstoffzellen-Luftversorgung für die Aufladung von Verbrennungsmotoren zu verwenden, obwohl Verdichter von Abgasturboladern deutlich höhere spezifische Drehzahlen aufweisen als Elektromotoren für die Brennstoffzellen-Luftversorgung . Obwohl im Allgemeinen bei Turbinen nicht die im Fahrzeugbau üblichen beengten Bauraumverhältnisse vorliegen, ist der erfindungsgemäße Luftversorger L analog auch für Turbinen einsetzbar, wobei anstatt des Radialdiffusors 2 und des axialen Ringraums 4 (= Axialdiffusor) Teil-Düsen einsetzbar sind, wobei jeweils ein Teil der Düsen axial verläuft und der andere Teil der Düsen radial in das Turbinenrad einmündet. Der radiale Düsenbereich bildet für diesen Fall optional das variable Element zur Einstellung des Strömungsquerschnitts. It is also possible to use the air supplier L according to the invention instead of for a fuel cell air supply for the supercharging of internal combustion engines, although compressors of exhaust gas turbochargers have significantly higher specific rotational speeds than electric motors for the fuel cell air supply. Although generally not available in turbines in the usual narrow space conditions in the vehicle, the invention Luftversorger L is analogously used for turbines, instead of the radial diffuser 2 and the axial annulus 4 (= axial diffuser) partial nozzles are used, each one part of Nozzle extends axially and the other part of the nozzle opens radially into the turbine wheel. The radial nozzle area forms in this case optionally the variable element for adjusting the flow cross-section.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Verdichter1 compressor
1.1 Verdichterrad1.1 compressor wheel
1.2 Rotationsachse1.2 rotation axis
2 Radialdiffusor2 radial diffuser
2.1 Radialbeschaufelung2.1 Radial blading
3 Umlenkkanal3 deflection channel
4 Axialer Ringraum4 axial annulus
4.1 Axialbeschaufelung4.1 axial blading
5 Spirale5 spiral
5.1 Austritt5.1 Exit
6 Elektromotor6 electric motor
6.1 Außenwandung6.1 outer wall
7 Brennstoffzelle7 fuel cell
8 Umblaseventil8 inflation valve
9 Regler9 controllers
10 Turbine10 turbine
L Luftversorger L air supplier

Claims

Patentansprüche claims
1. Luftversorger (L) mit einem Verdichter (1) mit einem Ra- dialdiffusor (2) , insbesondere für mittels eines Elektromotors (6) betriebene Luftversorgungssysteme von Brennstoffzellen (7) oder Abgasturbolader bei Verbrennungsmotoren, dadurch gekennzeichnet dass an den Radialdiffusor (2) ein Umlenkkanal (3) angeschlossen ist, der in einen axialen Ringraum (4) mündet an den eine Spirale (5) angeordnet ist, die nach innen verläuft .1. Air supplier (L) with a compressor (1) with a radialdiffusor (2), in particular for by means of an electric motor (6) operated air supply systems of fuel cells (7) or exhaust gas turbocharger in internal combustion engines, characterized in that the radial diffuser (2) a deflection channel (3) is connected, which opens into an axial annular space (4) to which a spiral (5) is arranged which extends inwards.
2. Luftversorger (L) nach Anspruch 1, dadurch gekennzeichnet, dass der axiale Ringraum (4) als ein beschaufelter Axial- diffusor ausgebildet ist.2. Air supplier (L) according to claim 1, characterized in that the axial annular space (4) is designed as a bladed axial diffuser.
3. Luftversorger (L) nach Anspruch 1, dadurch gekennzeichnet, dass der axiale Ringraum (4) als ein unbeschaufelter Axi- aldiffusor ausgebildet ist.3. Air supplier (L) according to claim 1, characterized in that the axial annular space (4) is formed as an uncoiled axial aldiffusor.
4. Luftversorger (L) nach Anspruch 1, 2 oder 3, gekennzeichnet durch eine im Wesentlichen zylinderförmige Außenhaut, deren Außendurchmesser nicht größer ist als 120 % des Außendurchmessers des Elektromotors (6).4. Air supplier (L) according to claim 1, 2 or 3, characterized by a substantially cylindrical outer skin whose outer diameter is not greater than 120% of the outer diameter of the electric motor (6).
5. Luftversorger (L) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Radialdiffusor (2) variabel verstellbar ist.5. Air supplier (L) according to one of the preceding claims, characterized in that the radial diffuser (2) is variably adjustable.
6. Luftversorger (L) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im Radialdiffusor (2) eine Radialbeschaufelung (2.1) angeordnet ist. 6. Air supplier (L) according to any one of the preceding claims, characterized in that in the radial diffuser (2) a radial blading (2.1) is arranged.
EP08759017A 2007-06-21 2008-06-04 Air supplier, particularly for an air supply system for fuel cells Withdrawn EP2165077A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007028742A DE102007028742A1 (en) 2007-06-21 2007-06-21 Air supplier, in particular for an air supply system of fuel cells
PCT/EP2008/004461 WO2008155023A1 (en) 2007-06-21 2008-06-04 Air supplier, particularly for an air supply system for fuel cells

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EP2165077A1 true EP2165077A1 (en) 2010-03-24

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US (1) US8567190B2 (en)
EP (1) EP2165077A1 (en)
DE (1) DE102007028742A1 (en)
WO (1) WO2008155023A1 (en)

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EP2317150B1 (en) * 2009-10-29 2019-12-18 ResMed Pty Ltd Patient ventilation device and components thereof
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KR102104415B1 (en) * 2015-02-05 2020-04-24 한화파워시스템 주식회사 Compressor
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JP6860331B2 (en) * 2016-11-29 2021-04-14 株式会社日立製作所 Diffuser, discharge channel, and centrifugal turbomachinery
JP2020510152A (en) * 2017-03-09 2020-04-02 ジョンソン コントロールズ テクノロジー カンパニーＪｏｈｎｓｏｎ Ｃｏｎｔｒｏｌｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏｍｐａｎｙ Collector for compressor
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US20100158722A1 (en) 2010-06-24
DE102007028742A1 (en) 2008-12-24
WO2008155023A1 (en) 2008-12-24
US8567190B2 (en) 2013-10-29

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