EP0808424A1 - Side channel pump - Google Patents

Side channel pump

Info

Publication number
EP0808424A1
EP0808424A1 EP96900949A EP96900949A EP0808424A1 EP 0808424 A1 EP0808424 A1 EP 0808424A1 EP 96900949 A EP96900949 A EP 96900949A EP 96900949 A EP96900949 A EP 96900949A EP 0808424 A1 EP0808424 A1 EP 0808424A1
Authority
EP
European Patent Office
Prior art keywords
impeller
side channel
channel
medium
housing
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
EP96900949A
Other languages
German (de)
French (fr)
Other versions
EP0808424B1 (en
Inventor
Henning Mollenhauer
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.)
Sterling Fluid Systems Germany GmbH
Original Assignee
Sterling Fluid Systems Germany 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 Sterling Fluid Systems Germany GmbH filed Critical Sterling Fluid Systems Germany GmbH
Publication of EP0808424A1 publication Critical patent/EP0808424A1/en
Application granted granted Critical
Publication of EP0808424B1 publication Critical patent/EP0808424B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00Pumps with circumferential or transverse flow
    • F04D5/002Regenerative pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00Pumps with circumferential or transverse flow
    • F04D5/002Regenerative pumps
    • F04D5/007Details of the inlet or outlet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00Geometry
    • F05B2250/50Inlet or outlet
    • F05B2250/503Inlet or outlet of regenerative pumps

Definitions

  • an impeller with star-shaped vanes and open interspaces between the vanes is closely surrounded by a housing which forms axially next to the impeller a side channel open to the impeller, in which the medium is conveyed by impulse exchange with the impeller.
  • a version has prevailed in which the supply and removal of the medium takes place on one and the same side of the impeller. This means that the inlet and outlet areas are concentrated on one pump part.
  • the side channel is also arranged on the side of the impeller on which the medium is supplied and discharged. This simplifies the medium guidance because the inlet and outlet openings are directly connected to the side channel.
  • the medium For other types of pumps in which the medium is supplied and removed on different sides of the impeller (this applies in particular to multi-stage pumps), the medium must be from the feed side through the impeller to the discharge side.
  • the removal of the medium from the side channel according to the invention is also new and surprising. As you know from multi-stage pumps, it is inherently problematic to guide the medium through the impeller from the side channel to the outlet opening. It would have been advisable to guide the medium from the side channel through the impeller to the outlet opening. This is all the more true since an essential property of the side channel pumps is that they require a comparatively small amount of space and material because the housing surrounds the impeller closely around the circumference and its diameter is therefore essentially limited to the impeller diameter. The bypass duct leading radially outside of the impeller from one side to the other puts this property into question in part because it is connected to an enlargement of the housing. However, this disadvantage is offset by the advantages of the invention.
  • the special bypass channel is expediently completely separated from the housing space in the area of the impeller plane, in which the impeller rotates.
  • the invention does not want to exclude designs in which the channel is open towards the impeller but is designed such that the majority of the medium flow is not captured by the impeller during the bypass around the impeller.
  • the bypass channel should be led tangentially out of the side channel and be deflected axially outside the impeller space in order to cross over to the other side of the housing.
  • peripheral pumps it is known to arrange an outlet channel radially outside the impeller (US-A-4508492, JP-A-1177492 abstract, JP-A-1147196 abstract, JP-A-1147195 abstract, FR-A-2237073, DE-A-3844158).
  • the channel in impulse exchange with the impeller is arranged in such a way that it surrounds the impeller symmetrically on both sides and on the circumference. This inevitably means that the medium is removed radially and possibly tangentially to reduce the losses.
  • peripheral pumps also made it unlikely that the medium discharge to the area radially outside the impeller could be associated with a reduction in noise, because peripheral pumps have an even higher noise level than conventional side channel pumps.
  • FIG. 1 shows an axial section through the impeller and the housing parts enclosing it
  • FIG. 2 shows a view in the direction X of the housing part containing the inlet and outlet openings
  • FIG. 3 shows a view of the other housing part in the same
  • the housing parts 1 and 2 include an impeller space, in which the impeller 3 rotates on a shaft, not shown.
  • the side channel 4 is formed, which is open to the vanes 5 of the impeller 3.
  • Its inlet end 6 lies opposite the inlet opening 7 formed in the housing part 2, so that the medium entering through the opening 7 can reach the side channel 4 through the spaces between the wings 5.
  • the inlet opening 7 is connected to upstream suction spaces through which the medium reaches the inlet opening 7.
  • the side channel is guided tangentially outwards in the region 8, so that a bypass channel 9, 10 is created.
  • This part 9 initially lies in the housing part 1 lying axially on one side of the impeller 3.
  • the part 10 then reaches a region lying radially outside the diameter of the impeller 3. Radially outside the impeller, it leads with an axial direction component to the other side of the impeller, the end of the bypass duct 10 located in the housing part 2 forming the outlet opening 12.
  • the medium is deflected in the axial direction.
  • the parts 9 and 10 of the bypass channel are separated from the impeller space by a housing tongue 11, so that there is no further influencing of the medium flow by the impeller in this area.
  • the medium passes from the outlet opening 12 in a known manner into a pressure chamber (not shown) of the pump which, together with the outlet opening 12, forms the devices for the medium discharge mentioned in the claim.
  • the pressure chamber can also be formed in the housing part 2, which is then made correspondingly larger than the drawing shows. Or to the disk-shaped housing part 2 there is connected a further, special housing part which contains the pressure chamber and the suction chamber and which is not shown in the drawing.
  • the bypass channel can be designed as a diffuser. A deflection of the channel 9, 10 in the direction parallel to the axis is generally not necessary. Rather, the channel part 10 is expediently oriented obliquely in the circumferential and axial directions. For these reasons, the outlet opening 12 in the housing part 2 is expediently equipped with a considerably larger cross section (measured parallel to the impeller plane) than the side channel (measured in the longitudinal plane). As a rule, the outlet opening should be 1.5 to 3 times larger than the side channel cross section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplifiers (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

PCT No. PCT/EP96/00128 Sec. 371 Date Nov. 14, 1997 Sec. 102(e) Date Nov. 14, 1997 PCT Filed Jan. 12, 1996 PCT Pub. No. WO96/24771 PCT Pub. Date Aug. 15, 1996A side channel pump has an impeller and a housing which closely encloses the impeller on both sides in the axial direction and about its circumference. Fluid inflow and discharge ports are provided on a first side of the impeller. The side channel is arranged at the second side of the impeller and directly communicates with the inflow port through the impeller. The downstream end of the side channel is connected to the discharge port by a rerouting channel that bypasses the impeller.

Description

Seitenkanalpumpe Side channel pump
In Seitenkanalpumpen wird ein Laufrad mit sternförmig angeord¬ neten Flügeln und offenen Flügelzwischenräumen eng von einem Gehäuse umgeben, das axial neben dem Laufrad einen zum Laufrad hin offenen Seitenkanal bildet, in welchem das Fördermedium durch Impulsaustausch mit dem Flügelrad gefördert wird. Für einstufige Pumpen hat sich eine Ausführung durchgesetzt, bei welcher die Zu- und Abfuhr des Mediums an ein und derselben Seite des Flügelrads stattfindet. Dadurch konzentrieren sich die Zu- und Abführungsräume auf ein Pumpenteil. Auch der Sei¬ tenkanal wird bei den bekannten Pumpen dieses Typs auf derje¬ nigen Seite des Laufrads angeordnet, auf der das Medium zu- und abgeführt wird. Dies vereinfacht die Mediumsführung, weil die Ein- und Austrittsöffnungen mit dem Seitenkanal unmittel¬ bar in Verbindung stehen.In side channel pumps, an impeller with star-shaped vanes and open interspaces between the vanes is closely surrounded by a housing which forms axially next to the impeller a side channel open to the impeller, in which the medium is conveyed by impulse exchange with the impeller. For single-stage pumps, a version has prevailed in which the supply and removal of the medium takes place on one and the same side of the impeller. This means that the inlet and outlet areas are concentrated on one pump part. In the known pumps of this type, the side channel is also arranged on the side of the impeller on which the medium is supplied and discharged. This simplifies the medium guidance because the inlet and outlet openings are directly connected to the side channel.
Bei anderen Pumpentypen, bei denen die Mediumszu- und -abfuhr auf unterschiedlichen Seiten des Laufrads stattfindet (das gilt insbesondere für mehrstufige Pumpen) , muß das Medium von der Zuführungsseite durch das Laufrad hindurch zur Abführungs¬ seite übertreten.For other types of pumps in which the medium is supplied and removed on different sides of the impeller (this applies in particular to multi-stage pumps), the medium must be from the feed side through the impeller to the discharge side.
Erfindungsgemäß wurde gefunden, daß bei einer Pumpe des ein¬ gangs erläuterten Typs durch die im Anspruch 1 genannten Merk¬ male der Wirkungsgrad und das Saugvermögen verbessert und die Geräuschentwicklung vermindert werden.According to the invention, it was found that in a pump of the type described at the outset, the efficiency and the pumping speed are improved by the features mentioned in claim 1 and the noise level is reduced.
Zwar vergrößert sich der Bauaufwand dadurch, daß der Seitenka¬ nal nicht auf der Mediumszu- und -abfuhrseite angeordnet wird. Jedoch wird dadurch die Kavitation im Eintrittsbereich der Flüssigkeit verringert. Diese Wirkung ist überraschend, denn während bei den bekannten Pumpen zwischen der Mediumsein¬ trittsöffnung und dem Flügelrad sich noch der Pufferquer¬ schnitt des Seitenkanals befindet, trifft bei der erfindungs¬ gemäßen Ausführung das aus Mediumseintrittsöffnung kommende Medium unvermittelt auf das Flügelrad.The construction effort is increased in that the side channel is not arranged on the medium supply and discharge side. However, this reduces cavitation in the entry area of the liquid. This effect is surprising, because while in the known pumps the buffer cross-section of the side channel is still between the medium inlet opening and the impeller, in the embodiment according to the invention the medium coming from the medium inlet opening suddenly hits the impeller.
Neu und überraschend ist auch die erfindungsgemäße Abfuhr des Mediums vom Seitenkanal. Wie man von mehrstufigen Pumpen weiß, ist es an sich umproblematisch, das Medium durch das Flügelrad hindurch vom Seitenkanal zur Austrittsöffnung zu führen. Es hätte sich also angeboten, das Medium von dem Seitenkanal durch das Flügelrad hindurch zur Austrittsöffnung zu führen. Dies gilt umso mehr, als eine wesentliche Eigenschaft der Sei- tenkanalpumpen darin besteht, daß sie einen vergleichsweise geringen Platz- und Materialbedarf haben, weil das Gehäuse das Flügelrad am Umfang eng umgibt und sein Durchmesser daher im wesentlichen auf etwa den Laufraddurchmeser beschränkt ist. Der erfindungsgemäß radial außerhalb des Flügelrads von einer zur anderen Seite führende Umführungskanal stellt diese Eigen¬ schaft teilweise in Frage, weil er mit einer Vergrößerung des Gehäuses verbunden ist. Dieser Nachteil wird jedoch durch die Vorteile der Erfindung aufgewogen.The removal of the medium from the side channel according to the invention is also new and surprising. As you know from multi-stage pumps, it is inherently problematic to guide the medium through the impeller from the side channel to the outlet opening. It would have been advisable to guide the medium from the side channel through the impeller to the outlet opening. This is all the more true since an essential property of the side channel pumps is that they require a comparatively small amount of space and material because the housing surrounds the impeller closely around the circumference and its diameter is therefore essentially limited to the impeller diameter. The bypass duct leading radially outside of the impeller from one side to the other puts this property into question in part because it is connected to an enlargement of the housing. However, this disadvantage is offset by the advantages of the invention.
Der besondere Umführungskanal ist zweckmäßigerweise im Bereich der Flügelradebene vollständig von dem Gehäuseraum getrennt, in welchem das Flügelrad umläuft. Jedoch will die Erfindung Ausführungen nicht ausschließen, bei welchen der Kanal zum Flügelrad hin geöffnet aber so gestaltet ist, daß der größte Teil des Mediumstroms während der Umführung um das Flügelrad herum vom Flügelrad nicht erfaßt wird. Der Umführungskanal sollte nach der Erfindung tangential aus dem Seitenkanal herausgeführt sein und außerhalb des Flügelradraums axial umgelenkt sein, um auf die andere Gehäuseseite hinüberzutre¬ ten.The special bypass channel is expediently completely separated from the housing space in the area of the impeller plane, in which the impeller rotates. However, the invention does not want to exclude designs in which the channel is open towards the impeller but is designed such that the majority of the medium flow is not captured by the impeller during the bypass around the impeller. According to the invention, the bypass channel should be led tangentially out of the side channel and be deflected axially outside the impeller space in order to cross over to the other side of the housing.
Dadurch, daß das Medium nicht durch das Flügelrad hindurch zur Austrittsöffnung gelangt und demnach die Flügel des Flügelrads nicht unmittelbar an der Austrittsöffnung entlangstreichen und dadurch Schallimpulse in sie hineinsenden, wird die Geräusch¬ erzeugung der Pumpen beträchtlich vermindert.The fact that the medium does not pass through the impeller to the outlet opening and therefore does not sweep the vanes of the impeller directly along the outlet opening and thereby send sound impulses into them, considerably reduces the noise generation of the pumps.
Zwar ist es bei Peripheralpumpen bekannt, einen Austrittskanal radial außerhalb des Flügelrads anzuordnen (US-A-4508492, JP-A-1177492 Abstract, JP-A-1147196 Abstract, JP-A-1147195 Ab- stract, FR-A-2237073, DE-A-3844158) . Jedoch herrschen bei Peripheralpumpen grundsätzlich andere konstruktive Vorausset¬ zungen als bei Seitenkanalpumpen. Bei Peripheralpumpen ist nämlich der im Impulsaustausch mit dem Flügelrad stehende Ka¬ nal so angeordnet, daß er das Flügelrad an beiden Seiten und am Umfang symmetrisch umgibt. Daraus ergibt sich zwangsläufig, daß die Abführung des Mediums zur Verringerung der Verluste radial und ggf. tangential erfolgt. Die Erfahrungen mit Peri¬ pheralpumpen ließen auch nicht erwarten, daß die Mediumsabfüh¬ rung zum radial außerhalb des Flügelrads liegenden Bereich mit einer Geräuschverminderung verbunden sein könnte, weil Peri¬ pheralpumpen eine noch höhere Geräuschentwicklung als herkömm¬ liche Seitenkanalpumpen haben.In peripheral pumps it is known to arrange an outlet channel radially outside the impeller (US-A-4508492, JP-A-1177492 abstract, JP-A-1147196 abstract, JP-A-1147195 abstract, FR-A-2237073, DE-A-3844158). However, there are fundamentally different design requirements for peripheral pumps than for side channel pumps. In the case of peripheral pumps, the channel in impulse exchange with the impeller is arranged in such a way that it surrounds the impeller symmetrically on both sides and on the circumference. This inevitably means that the medium is removed radially and possibly tangentially to reduce the losses. Experience with peripheral pumps also made it unlikely that the medium discharge to the area radially outside the impeller could be associated with a reduction in noise, because peripheral pumps have an even higher noise level than conventional side channel pumps.
Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel schematisch veranschaulicht. Darin zeigen: Fig. 1 einen Axialschnitt durch das Flügelrad und die es einschließenden Gehäuseteile, Fig. 2 eine Ansicht in Richtung X des die Ein- und Aus- trittsöffnungen enthaltenden Gehäuseteils und Fig. 3 eine Ansicht des anderen Gehäuseteils in derselbenThe invention is explained in more detail below with reference to the drawing, which schematically illustrates an advantageous embodiment. In it show: 1 shows an axial section through the impeller and the housing parts enclosing it, FIG. 2 shows a view in the direction X of the housing part containing the inlet and outlet openings, and FIG. 3 shows a view of the other housing part in the same
Blickrichtung.Line of sight.
Die Gehäuseteile 1 und 2 schließen einen Flügelradraum ein, in welchem das Flügelrad 3 auf einer nicht dargestellten Welle umläuft. Im Gehäuseteil 1 ist der Seitenkanal 4 gebildet, der zu den Flügeln 5 des Flügelrads 3 hin offen ist. Sein Ein¬ trittsende 6 liegt gegenüber der im Gehäuseteil 2 gebildeten Eintrittsöffnung 7, so daß das durch die Öffnung 7 eintretende Medium durch die Zwischenräume der Flügel 5 hindurch zum Sei¬ tenkanal 4 gelangen kann. Die Eintrittsöffnung 7 ist mit vor¬ geschalteten Saugräumen verbunden, durch die das Medium zu der Eintrittsöffnung 7 gelangt. Diese Saugräume, die im Anspruch gemeinsam mit der Eintrittsöffnung 7 als Einrichtungen für die Mediumszufuhr bezeichnet sind, können in demselben, entspre¬ chend erweiterten Gehäuseteil 2 oder in einem vorgeschalteten, nicht dargestellten Gehäuseteil angeordnet sein.The housing parts 1 and 2 include an impeller space, in which the impeller 3 rotates on a shaft, not shown. In the housing part 1, the side channel 4 is formed, which is open to the vanes 5 of the impeller 3. Its inlet end 6 lies opposite the inlet opening 7 formed in the housing part 2, so that the medium entering through the opening 7 can reach the side channel 4 through the spaces between the wings 5. The inlet opening 7 is connected to upstream suction spaces through which the medium reaches the inlet opening 7. These suction spaces, which are designated in the claim together with the inlet opening 7 as devices for the medium supply, can be arranged in the same, correspondingly enlarged housing part 2 or in an upstream housing part, not shown.
Von seinem Ende 17 ausgehend ist der Seitenkanal im Bereich 8 tangential nach außen geführt, so daß ein Umführungskanal 9, 10 geschaffen wird. Dieser liegt zunächst mit seinem Teil 9 im axial auf einer Seite des Flügelrads 3 liegenden Gehäuseteil 1. Er gelangt dann mit seinem Teil 10 in einen radial außer¬ halb des Durchmessers des Flügelrads 3 liegenden Bereich. Ra¬ dial außerhalb des Flügelrads führt er mit axialer Richtungs¬ komponente auf die andere Seite des Flügelrads, wobei das Ende des im Gehäuseteil 2 befindlichen Umführungskanals 10 die Austrittsöffnung 12 bildet. Beim Übergang von dem Teil 9 des Umführungskanals in den Gehäuseteil 10 wird das Medium in Axialrichtung umgelenkt. Die Teile 9 und 10 des Umführungska¬ nals sind durch eine Gehäusezunge 11 von dem Flügelradraum ge¬ trennt, so daß eine weitere Beeinflussung des Mediumsstroms durch das Flügelrad in diesem Bereich unterbleibt. Dadurch kann der Austrittsstrom sich beruhigen und die Geräuscherzeu¬ gung wird vermindert. Aus der Austrittsöffnung 12 gelangt das Medium in bekannter Weise in einen nicht dargestellten Druck¬ raum der Pumpe, der mit der Austrittsöffnung 12 die im An¬ spruch genannten Einrichtungen für die Mediumsabfuhr bildet. Der Druckraum kann auch in dem Gehäuseteil 2 gebildet sein, das dann entsprechend größer ausgebildet ist, als es die Zeichnung zeigt. Oder es ist an das scheibenförmige Gehäuse¬ teil 2 ein weiteres, den Druckraum sowie den Saugraum enthal¬ tendes, besonderes Gehäuseteil angeschlossen, das in der Zeichnung nicht gezeigt ist.Starting from its end 17, the side channel is guided tangentially outwards in the region 8, so that a bypass channel 9, 10 is created. This part 9 initially lies in the housing part 1 lying axially on one side of the impeller 3. The part 10 then reaches a region lying radially outside the diameter of the impeller 3. Radially outside the impeller, it leads with an axial direction component to the other side of the impeller, the end of the bypass duct 10 located in the housing part 2 forming the outlet opening 12. At the transition from part 9 of the bypass duct into the housing part 10, the medium is deflected in the axial direction. The parts 9 and 10 of the bypass channel are separated from the impeller space by a housing tongue 11, so that there is no further influencing of the medium flow by the impeller in this area. Thereby the outlet flow can calm down and noise generation is reduced. The medium passes from the outlet opening 12 in a known manner into a pressure chamber (not shown) of the pump which, together with the outlet opening 12, forms the devices for the medium discharge mentioned in the claim. The pressure chamber can also be formed in the housing part 2, which is then made correspondingly larger than the drawing shows. Or to the disk-shaped housing part 2 there is connected a further, special housing part which contains the pressure chamber and the suction chamber and which is not shown in the drawing.
Läßt man die Gehäusezunge 11 weg, so daß der Umführungskanal 9, 10 zum Flügelrad hin offenbleibt, so kann auch in diesem Bereich noch ein die Leistung erhöhender Impulsaustausch zwi¬ schen Medium und Flügelrad stattfinden, so daß diese Ausfüh¬ rung ebenfalls Vorteile haben kann, wenngleich die Geräusch¬ minderung nicht so stark ist wie im dargestellten Beispiel.If the housing tongue 11 is omitted so that the bypass duct 9, 10 remains open towards the impeller, then in this area there can also be an exchange of impulses between the medium and the impeller, so that this embodiment can also have advantages, although the noise reduction is not as strong as in the example shown.
Der Umführungskanal kann als Diffusor ausgebildet sein. Eine Umlenkung des Kanals 9, 10 in die achsparallele Richtung ist im allgemeinen nicht erforderlich. Vielmehr wird der Kanalteil 10 zweckmäßigerweise schräg in Umfangs- und Axialrichtung aus¬ gerichtet. Aus diesen Gründen wird die Austrittsöffnung 12 im Gehäuseteil 2 zweckmäßigerweise mit beträchtlich größerem Querschnitt (gemessen parallel zur Flügelradebene) als der Seitenkanal (gemessen in der Längsebene) ausgestattet. In der Regel soll die Austrittsöffnung um den Faktor 1,5 bis 3 größer als der Seitenkanalguerschnitt sein. The bypass channel can be designed as a diffuser. A deflection of the channel 9, 10 in the direction parallel to the axis is generally not necessary. Rather, the channel part 10 is expediently oriented obliquely in the circumferential and axial directions. For these reasons, the outlet opening 12 in the housing part 2 is expediently equipped with a considerably larger cross section (measured parallel to the impeller plane) than the side channel (measured in the longitudinal plane). As a rule, the outlet opening should be 1.5 to 3 times larger than the side channel cross section.

Claims

Patentansprüche claims
1. Seitenkanalpumpe mit einem Flügelrad (3) und einem Gehäuse (1,2), das das Flügelrad (3) axial beiderseits und am Um¬ fang eng einschließt und auf einer axialen Seite des Flü¬ gelrads Einrichtungen (7,12) für die Mediumszu- und -abfuhr bildet, dadurch gekennzeichnet, daß der Seitenka¬ nal (4) auf der anderen Seite des Flügelrads angeordnet ist und das Austrittsende (17) des Seitenkanals (4) durch einen besonderen Umführungskanal (9,10), der im wesentli¬ chen radial außerhalb des Flügelrads (3) von einer Flügel¬ radseite zur anderen durch die Flügelradebene geführt ist, mit den Einrichtungen (7,12) zur Mediumsabfuhr verbunden ist.1. Side channel pump with an impeller (3) and a housing (1, 2) which tightly encloses the impeller (3) axially on both sides and on the circumference and devices (7, 12) for the on an axial side of the impeller Medium supply and discharge forms, characterized in that the side channel (4) is arranged on the other side of the impeller and the outlet end (17) of the side channel (4) through a special bypass channel (9, 10) which is essentially ¬ Chen is guided radially outside the impeller (3) from one impeller side to the other through the impeller plane, is connected to the devices (7, 12) for medium removal.
2. Seitenkanalpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Umführungskanal (9,10) von dem Flügelradraum ge¬ trennt ist.2. Side channel pump according to claim 1, characterized in that the bypass channel (9, 10) is separated from the impeller space.
3. Seitenkanalpumpe nach Anspruch 1 oder 2, dadurch gekenn¬ zeichnet, daß der Umführungskanal (9,10) tangential aus dem Seitenkanal (4) herausgeführt und außerhalb des Flü¬ gelradraums axial umgelenkt ist.3. Side channel pump according to claim 1 or 2, characterized gekenn¬ characterized in that the bypass channel (9,10) tangentially out of the side channel (4) and is deflected axially outside the wing wheel space.
4. Seitenkanalpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Querschnittsgröße der Mediumsaus¬ trittsöffnung (12) mindestens 1,5-mal größer ist als die Querschnittsgröße des Seitenkanals (4). 4. Side channel pump according to one of claims 1 to 3, characterized in that the cross-sectional size of the medium outlet opening (12) is at least 1.5 times larger than the cross-sectional size of the side channel (4).
EP96900949A 1995-02-06 1996-01-12 Side channel pump Expired - Lifetime EP0808424B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29501872U 1995-02-06
DE29501872U DE29501872U1 (en) 1995-02-06 1995-02-06 Side channel outlet shape
PCT/EP1996/000128 WO1996024771A1 (en) 1995-02-06 1996-01-12 Side channel pump

Publications (2)

Publication Number Publication Date
EP0808424A1 true EP0808424A1 (en) 1997-11-26
EP0808424B1 EP0808424B1 (en) 1998-09-23

Family

ID=8003474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900949A Expired - Lifetime EP0808424B1 (en) 1995-02-06 1996-01-12 Side channel pump

Country Status (9)

Country Link
US (1) US5913657A (en)
EP (1) EP0808424B1 (en)
AT (1) ATE171518T1 (en)
AU (1) AU695066B2 (en)
CA (1) CA2212222C (en)
DE (2) DE29501872U1 (en)
FI (1) FI107832B (en)
NO (1) NO313110B1 (en)
WO (1) WO1996024771A1 (en)

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Also Published As

Publication number Publication date
NO973605D0 (en) 1997-08-05
NO313110B1 (en) 2002-08-12
EP0808424B1 (en) 1998-09-23
AU4486296A (en) 1996-08-27
WO1996024771A1 (en) 1996-08-15
FI973139A0 (en) 1997-07-29
FI107832B (en) 2001-10-15
ATE171518T1 (en) 1998-10-15
DE29501872U1 (en) 1996-05-30
DE59600600D1 (en) 1998-10-29
CA2212222A1 (en) 1996-08-15
US5913657A (en) 1999-06-22
NO973605L (en) 1997-08-05
AU695066B2 (en) 1998-08-06
FI973139A (en) 1997-07-29
CA2212222C (en) 2005-06-14

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