EP1192359A1 - Feed pump - Google Patents

Feed pump

Info

Publication number
EP1192359A1
EP1192359A1 EP01933662A EP01933662A EP1192359A1 EP 1192359 A1 EP1192359 A1 EP 1192359A1 EP 01933662 A EP01933662 A EP 01933662A EP 01933662 A EP01933662 A EP 01933662A EP 1192359 A1 EP1192359 A1 EP 1192359A1
Authority
EP
European Patent Office
Prior art keywords
guide vanes
feed pump
impeller
pump according
radially inner
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Withdrawn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
EP01933662A
Other languages
German (de)
French (fr)
Inventor
Peter Marx
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1192359A1 publication Critical patent/EP1192359A1/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Withdrawn legal-status Critical Current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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F04D5/003—Regenerative pumps of multistage type
    • F04D5/005—Regenerative pumps of multistage type the stages being radially offset

Definitions

  • the invention relates to a feed pump, which is provided in particular for arrangement in a baffle of a fuel tank of a motor vehicle, with a driven impeller rotating in a pump housing, with a plurality of concentrically surrounding rings of vane chambers and with guide vanes arranged in the pump housing, the rings of the Vane chambers opposing partially annular channels extending from an inlet channel to an outlet channel.
  • feed pumps are usually designed as peripheral or side channel pumps and are known in practice.
  • the feed pump can be designed in several stages or for delivering fuel in particular from the fuel tank into a swirl pot and at the same time from the swirl pot to an internal combustion engine of the motor vehicle.
  • the impeller is usually attached to a shaft of an electric motor. Between the partially annular channels, the pump housing faces the impeller to form a sealing gap with a particularly small distance. With this design, several pump stages can be arranged on a single impeller and these can be freely designed for the respective application.
  • a disadvantage of the known feed pump is that a pressure difference between the partially annular channels enclosing each other leads to an overflow of the delivered liquid and thus to strong axial forces on the impeller. The overflow thus reduces the efficiency of the feed pump.
  • the invention is based on the problem of designing a feed pump of the type mentioned at the outset in such a way that overflow of the liquid to be pumped between partially ring-shaped channels is largely avoided.
  • This problem is solved according to the invention in that the impeller has several planes in the axial direction and that at least two rings of the guide vanes are arranged on two different planes.
  • the sealing gap can be made particularly long, so that a particularly high resistance is opposed to an overflow of the liquid to be conveyed.
  • the feed pump according to the invention with the same gap width of the sealing gap, particularly little liquid flows over from one partially annular channel to the other partially annular channel. Axial forces acting on the impeller can thereby be kept particularly low.
  • the feed pump according to the invention thus has a particularly high degree of efficiency.
  • Another advantage of this design is that the impeller can be mounted in the correct position on the shaft of the electric motor through the two levels. The intended direction of rotation of the impeller is thereby reliably guaranteed.
  • the sealing gap can be kept particularly small with an axial play of the impeller provided if the impeller has a circumferential collar for separating the different levels and the pump housing has a shoulder corresponding to the collar.
  • the impeller and the pump housing can be manufactured particularly inexpensively if the collar is cylindrical.
  • the feed pump according to the invention requires a particularly small axial installation space if the inlet channel or the outlet channel of the radially inner partially annular channel is guided radially outwards through a web in the pump housing between the outlet channel and the inlet channel of the radially outer partially annular channel.
  • the feed pump according to the invention helps to further reduce the axial dimensions of the feed pump according to the invention if the plane of the radially inner ring of the guide vanes is at a greater distance from the wheel-driving electric motor has as the plane of the radially outer rim of the guide vanes.
  • the radially outer, partially annular channel can be arranged at least partially radially outside the electric motor in the assembled state of the feed pump.
  • the radially inner ring of vane chambers can hereby be arranged particularly deep and thus avoid a large suction head. A large suction head leads to the formation of gas bubbles, especially with hot fuel, and thus to a sharp drop in the efficiency of the feed pump. Due to the particularly deep arrangement of the radially inner ring of the vane chambers, the feed pump according to the invention has a particularly high efficiency.
  • the vane chambers of the radially inner ring can have a particularly large diameter and can therefore be designed to promote the largest possible volume flow if the impeller is thicker in the area of the radially inner ring of the guide vanes than in the area of the radial outer ring of the guide vanes.
  • the delivery pump according to the invention is particularly simple in construction if the vane chambers of the radially inner ring of the guide vanes are approximately twice the diameter of the vane chambers of the radial one have outer ring of the guide vanes.
  • Axial delivery of the fuel by the feed pump can be achieved according to another advantageous development of the invention with particularly little structural effort if the impeller has end faces in the radially outer region of mutually opposed rings of guide vanes and interconnected vane chambers.
  • the invention permits numerous embodiments. To further clarify its basic principle, one of these is shown in the drawing and is described below. This shows in
  • FIG. 1 shows a longitudinal section through a feed pump according to the invention, mounted in a swirl pot of a motor vehicle
  • FIG. 2 shows a plan view of a lower housing part of a pump housing of the feed pump from FIG. 1.
  • FIG. 1 shows a bottom of a fuel tank 1 of a motor vehicle with a baffle 2 supported thereon.
  • a feed pump 3 is arranged inside the baffle 2.
  • the feed pump 3 forms a structural unit with an electric motor 4 and has a connecting piece 5 which penetrates the bottom of the surge pot 2 and on which a filter 6 which is in contact with the bottom of the fuel tank 1 is fastened.
  • the filter 6 is shown schematically.
  • the feed pump 3 has two inlet channels 7, 8, one of which is guided through the nozzle 5 to the filter 6 and the other to the bottom of the baffle 2, and two outlet channels 9, 10, one of which is in the baffle 2 and the other opens into a housing 11 of the electric motor 4.
  • An impeller 13 of the feed pump 3 is arranged in a rotationally fixed manner on a shaft 12 of the electric motor 4 and is opposite a fixed pump housing 14 at a short distance.
  • the shaft 12 is supported in the pump housing 14 by means of a ball 15.
  • the pump housing 14 has an upper housing part 16 and a lower housing part 17, which has the two inlet channels 7, 8.
  • the impeller 13 has two axially spaced planes 18, 19 in the axial direction.
  • the levels 18, 19 are separated from one another by a circumferential collar 20.
  • the impeller 13 has a radially inner ring of guide vanes 21 and two mutually opposing rings in its radially outer region Guide vanes 22.
  • the guide vanes 21, 22 delimit vane chambers 23, 24 arranged in the impeller 13.
  • the radially inner ring of the guide vanes 21 is arranged further away from the electric motor 4 than the radially outer rings of the guide vanes 22 Wreaths of the guide vanes 22 are interconnected.
  • partially annular channels 25, 26 are arranged in the pump housing 14.
  • the partially annular channels 25, 26 form with the blade chambers 23, 24 each of one of the inlet channels 7, 8 to one of the outlet channels 9, 10 extending delivery chambers 27, 28.
  • the delivery pump 3 delivers fuel from the fuel tank 1 through the radially inner delivery chamber 27 into the baffle 2 and through the radially outer delivery chamber 28 out of the baffle 2 through the electric motor 4 to an internal combustion engine (not shown) of the motor vehicle.
  • the outlet channel 9 of the radially inner delivery chamber 27 is guided radially outwards by a web 29.
  • the circumferential collar 20 is opposite a shoulder 30 of the pump housing 14 with a small distance. This area thus serves as a sealing gap, which largely prevents fuel from flowing over between delivery chambers 27, 28 having different pressures.
  • the inlet channels 7, 8 and the outlet channels 9, 10 are arranged opposite one another to simplify the drawing.
  • the partially annular channels 25, 26 can also extend over a larger angular range.
  • FIG. 2 shows a view of the lower housing part 17 of the pump housing 14 as seen from the impeller 13 from FIG. 1. It can be seen here that the partially annular channels 25, 26 extend over an angular range of approximately 300 °.

Abstract

The invention relates to a feed pump (3) comprising two feed compartments (27, 28) that are disposed on different axial levels (18, 19) and that enclose each other. The radially inner feed compartment (27) serves for filling a baffle pot (2) of the fuel tank of a motor vehicle, and the radially outer feed compartment (28) serves for suction from the baffle pot (2). The inventive feed pump (3) is especially compact and can be sunk especially far into the baffle pot (2) with its radially inner feed compartment (27).

Description

Förderpumpe feed pump
Beschreibungdescription
Die Erfindung betrifft eine Förderpumpe, welche insbesondere zur Anordnung in einem Schwalltopf eines Kraftstoffbehälters eines Kraftfahrzeuges vorgesehen ist, mit einem angetriebenen, sich in einem Pumpengehäuse drehenden Laufrad, mit mehreren einander konzentrisch umschließenden Kränzen Schaufelkammern begrenzende Leitschaufeln und mit in dem Pumpengehäuse angeordneten, den Kränzen der Schaufelkammern gegenüberstehenden teilringförmigen, sich von einem Einlaßkanal bis zu einem Auslaßkanal erstreckenden Kanälen.The invention relates to a feed pump, which is provided in particular for arrangement in a baffle of a fuel tank of a motor vehicle, with a driven impeller rotating in a pump housing, with a plurality of concentrically surrounding rings of vane chambers and with guide vanes arranged in the pump housing, the rings of the Vane chambers opposing partially annular channels extending from an inlet channel to an outlet channel.
Solche Förderpumpen werden meist als Peripheral- oder Seitenkanal- pumpe ausgeführt und sind aus der Praxis bekannt. Die Förderpumpe kann hierbei mehrstufig oder zur Förderung insbesondere von Kraftstoff aus dem Kraftstoffbehälter in einen Schwalltopf und gleichzeitig aus dem Schwalltopf zu einer Brennkraftmaschine des Kraftfahrzeuges ausgebildet sein. Das Laufrad ist in der Regel auf einer Welle eines Elektromotors befestigt. Zwischen den teilringförmigen Kanälen steht das Pumpengehäuse dem Laufrad zur Bildung eines Dichtspaltes mit besonders geringem Abstand gegenüber. Durch diese Gestaltung lassen sich auf einem einzigen Laufrad mehrere Pumpstufen anordnen und diese für den jeweiligen Anwendungsfall frei gestalten.Such feed pumps are usually designed as peripheral or side channel pumps and are known in practice. The feed pump can be designed in several stages or for delivering fuel in particular from the fuel tank into a swirl pot and at the same time from the swirl pot to an internal combustion engine of the motor vehicle. The impeller is usually attached to a shaft of an electric motor. Between the partially annular channels, the pump housing faces the impeller to form a sealing gap with a particularly small distance. With this design, several pump stages can be arranged on a single impeller and these can be freely designed for the respective application.
Nachteilig bei der bekannten Förderpumpe ist, daß ein Druckunterschied zwischen den einander umschließenden teilringförmigen Kanälen zu einem Überströmen der geförderten Flüssigkeit und damit zu starken Axialkräften auf das Laufrad führt. Das Überströmen vermindert damit den Wirkungsgrad der Förderpumpe.A disadvantage of the known feed pump is that a pressure difference between the partially annular channels enclosing each other leads to an overflow of the delivered liquid and thus to strong axial forces on the impeller. The overflow thus reduces the efficiency of the feed pump.
Der Erfindung liegt das Problem zugrunde, eine Förderpumpe der eingangs genannten Art so zu gestalten, daß ein Überströmen der zu fördernden Flüssigkeit zwischen einander umschließenden teilringförmigen Kanälen weitgehend vermieden wird. Dieses Problem wird erfindungsgemäß dadurch gelöst, daß das Laufrad in axialer Richtung mehrere Ebenen aufweist, daß zumindest zwei Kränze der Leitschaufeln auf zwei unterschiedlichen Ebenen angeordnet sind.The invention is based on the problem of designing a feed pump of the type mentioned at the outset in such a way that overflow of the liquid to be pumped between partially ring-shaped channels is largely avoided. This problem is solved according to the invention in that the impeller has several planes in the axial direction and that at least two rings of the guide vanes are arranged on two different planes.
Durch diese Gestaltung läßt sich der Dichtspalt besonders lang gestalten, so daß einem Überströmen der zu fördernden Flüssigkeit ein besonders hoher Widerstand entgegengesetzt wird. Im Vergleich zu der bekannten Förderpumpe strömt bei der erfindungsgemäßen Förderpumpe bei gleicher Spaltbreite des Dichtspaltes besonders wenig Flüssigkeit von dem einen teilringförmigen Kanal auf den anderen teilringförmigen Kanal über. Auf das Laufrad wirkende Axialkräfte lassen sich hierdurch besonders gering halten. Die erfindungsgemäße Förderpumpe hat damit einen besonders großen Wirkungsgrad. Ein weiterer Vorteil dieser Gestaltung ist, daß sich das Laufrad durch die beiden Ebenen besonders einfach lagerichtig auf der Welle des Elektromotors montieren läßt. Der vorgesehene Drehsinn des Laufrades wird hierdurch zuverlässig gewährleistet.With this design, the sealing gap can be made particularly long, so that a particularly high resistance is opposed to an overflow of the liquid to be conveyed. In comparison with the known feed pump, in the feed pump according to the invention, with the same gap width of the sealing gap, particularly little liquid flows over from one partially annular channel to the other partially annular channel. Axial forces acting on the impeller can thereby be kept particularly low. The feed pump according to the invention thus has a particularly high degree of efficiency. Another advantage of this design is that the impeller can be mounted in the correct position on the shaft of the electric motor through the two levels. The intended direction of rotation of the impeller is thereby reliably guaranteed.
Der Dichtspalt läßt sich gemäß einer vorteilhaften Weiterbildung der Erfindung bei einem vorgesehenen axialen Spiel des Laufrades besonders klein halten, wenn das Laufrad einen umlaufenden Bund zur Trennung der unterschiedlichen Ebenen und das Pumpengehäuse einen dem Bund entsprechenden Absatz aufweist.According to an advantageous development of the invention, the sealing gap can be kept particularly small with an axial play of the impeller provided if the impeller has a circumferential collar for separating the different levels and the pump housing has a shoulder corresponding to the collar.
Das Laufrad und das Pumpengehäuse lassen sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders kostengünstig fertigen, wenn der Bund zylindrisch gestaltet ist.According to another advantageous development of the invention, the impeller and the pump housing can be manufactured particularly inexpensively if the collar is cylindrical.
Die erfindungsgemäße Förderpumpe erfordert einen besonders geringen axialen Bauraum, wenn der Einlaßkanal oder der Auslaßkanal des radial inneren teilringförmigen Kanals radial nach außen durch einen Steg im Pumpengehäuse zwischen dem Auslaßkanal und dem Einlaßkanal des radial äußeren teilringförmigen Kanals geführt ist.The feed pump according to the invention requires a particularly small axial installation space if the inlet channel or the outlet channel of the radially inner partially annular channel is guided radially outwards through a web in the pump housing between the outlet channel and the inlet channel of the radially outer partially annular channel.
Zur weiteren Verringerung der axialen Abmessungen der erfindungsgemäßen Förderpumpe trägt es bei, wenn die Ebene des radial inneren Kranzes der Leitschaufeln einen größeren Abstand von einem das Lauf- rad antreibenden Elektromotor hat als die Ebene des radial äußeren Kranzes der Leitschaufeln. Hierdurch kann beispielsweise der radial äußere teilringförmige Kanal im montierten Zustand der Förderpumpe zumindest teilweise radial außerhalb des Elektromotors angeordnet sein. Bei der in dem Schwalltopf des Kraftstoffbehälters montierten Förderpumpe läßt sich hierdurch der radial innere Kranz Schaufelkammern besonders tief anordnen und damit eine große Ansaughöhe vermeiden. Eine große Ansaughöhe führt insbesondere bei heißem Kraftstoff zur Bildung von Gasblasen und damit zu einem starken Abfall des Wirkungsgrades der Förderpumpe. Durch die besonders tiefe Anordnung des radial inneren Kranzes der Schaufelkammern hat die erfindungsgemäße Förderpumpe einen besonders hohen Wirkungsgrad.It helps to further reduce the axial dimensions of the feed pump according to the invention if the plane of the radially inner ring of the guide vanes is at a greater distance from the wheel-driving electric motor has as the plane of the radially outer rim of the guide vanes. As a result, for example, the radially outer, partially annular channel can be arranged at least partially radially outside the electric motor in the assembled state of the feed pump. In the case of the feed pump mounted in the surge pot of the fuel tank, the radially inner ring of vane chambers can hereby be arranged particularly deep and thus avoid a large suction head. A large suction head leads to the formation of gas bubbles, especially with hot fuel, and thus to a sharp drop in the efficiency of the feed pump. Due to the particularly deep arrangement of the radially inner ring of the vane chambers, the feed pump according to the invention has a particularly high efficiency.
Die Schaufelkammern des radial inneren Kranzes Leitschaufeln können gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders großen Durchmesser aufweisen und damit zur Förderung eines möglichst großen Volumenstroms gestaltet sein, wenn das Laufrad im Bereich des radial inneren Kranzes der Leitschaufeln dicker ist, als im Bereich des radial äußeren Kranzes der Leitschaufeln.According to another advantageous development of the invention, the vane chambers of the radially inner ring can have a particularly large diameter and can therefore be designed to promote the largest possible volume flow if the impeller is thicker in the area of the radially inner ring of the guide vanes than in the area of the radial outer ring of the guide vanes.
Bei einer vorgesehenen Förderung von Kraftstoff zu der Brennkraftmaschine des Kraftfahrzeuges vorgesehenen hohen Förderdruck und dem möglichst großen in den Schwalltopf zu fördernden Volumenstrom gestaltet sich die erfindungsgemäße Förderpumpe konstruktiv besonders einfach, wenn die Schaufelkammern des radial inneren Kranzes der Leitschaufeln ungefähr den doppelten Durchmesser der Schaufelkammern des radial äußeren Kranzes der Leitschaufeln aufweisen.With the intended delivery of fuel to the internal combustion engine of the motor vehicle, the high delivery pressure provided and the greatest possible volume flow to be delivered into the swirl pot, the delivery pump according to the invention is particularly simple in construction if the vane chambers of the radially inner ring of the guide vanes are approximately twice the diameter of the vane chambers of the radial one have outer ring of the guide vanes.
Eine axiale Förderung des Kraftstoffs durch die Förderpumpe läßt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung mit besonders geringem baulichen Aufwand erreichen, wenn das Laufrad seinen Stirnseiten im radial äußeren Bereich einander gegenüberstehende Kränze von Leitschaufeln und untereinander verbundene Schaufelkammern aufweist. Die Erfindung läßt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt inAxial delivery of the fuel by the feed pump can be achieved according to another advantageous development of the invention with particularly little structural effort if the impeller has end faces in the radially outer region of mutually opposed rings of guide vanes and interconnected vane chambers. The invention permits numerous embodiments. To further clarify its basic principle, one of these is shown in the drawing and is described below. This shows in
Fig.1 einen Längsschnitt durch eine erfindungsgemäße, in einem Schwalltopf eines Kraftfahrzeuges montierte Förderpumpe,1 shows a longitudinal section through a feed pump according to the invention, mounted in a swirl pot of a motor vehicle,
Fig.2 eine Draufsicht auf ein unteres Gehäuseteil eines Pumpengehäuses der Förderpumpe aus Figur 1.2 shows a plan view of a lower housing part of a pump housing of the feed pump from FIG. 1.
Figur 1 zeigt einen Boden eines Kraftstoffbehälters 1 eines Kraftfahrzeuges mit einem sich darauf abstützenden Schwalltopf 2. Innerhalb des Schwalltopfes 2 ist eine Förderpumpe 3 angeordnet. Die Förderpumpe 3 bildet mit einem Elektromotor 4 eine bauliche Einheit und hat einen den Boden des Schwalltopfes 2 durchdringenden Stutzen 5, auf dem ein an dem Boden des Kraftstoffbehälters 1 anliegender Filter 6 befestigt ist. Zur Vereinfachung der Zeichnung ist der Filter 6 schematisch dargestellt. Die Förderpumpe 3 hat zwei Einlaßkanäle 7, 8, von denen einer durch den Stutzen 5 bis zu dem Filter 6 und der andere bis vor den Boden des Schwalltopfes 2 geführt ist, und zwei Auslaßkanäle 9, 10, von denen einer in den Schwalltopf 2 und der andere in ein Gehäuse 11 des Elektromotors 4 mündet. Auf einer Welle 12 des Elektromotors 4 ist ein Laufrad 13 der Förderpumpe 3 drehfest angeordnet und steht mit geringem Abstand einem feststehenden Pumpengehäuse 14 gegenüber. Die Welle 12 ist mittels einer Kugel 15 in dem Pumpengehäuse 14 gelagert.FIG. 1 shows a bottom of a fuel tank 1 of a motor vehicle with a baffle 2 supported thereon. A feed pump 3 is arranged inside the baffle 2. The feed pump 3 forms a structural unit with an electric motor 4 and has a connecting piece 5 which penetrates the bottom of the surge pot 2 and on which a filter 6 which is in contact with the bottom of the fuel tank 1 is fastened. To simplify the drawing, the filter 6 is shown schematically. The feed pump 3 has two inlet channels 7, 8, one of which is guided through the nozzle 5 to the filter 6 and the other to the bottom of the baffle 2, and two outlet channels 9, 10, one of which is in the baffle 2 and the other opens into a housing 11 of the electric motor 4. An impeller 13 of the feed pump 3 is arranged in a rotationally fixed manner on a shaft 12 of the electric motor 4 and is opposite a fixed pump housing 14 at a short distance. The shaft 12 is supported in the pump housing 14 by means of a ball 15.
Das Pumpengehäuse 14 hat ein oberes Gehäuseteil 16 und ein unteres, die beiden Einlaßkanäle 7, 8 aufweisendes Gehäuseteil 17. Das Laufrad 13 weist in axialer Richtung zwei axial voneinander beabstandete Ebenen 18, 19 auf. Die Ebenen 18, 19 werden von einem umlaufenden Bund 20 voneinander getrennt.The pump housing 14 has an upper housing part 16 and a lower housing part 17, which has the two inlet channels 7, 8. The impeller 13 has two axially spaced planes 18, 19 in the axial direction. The levels 18, 19 are separated from one another by a circumferential collar 20.
Das Laufrad 13 hat einen radial inneren Kranz Leitschaufeln 21 und in seinem radial äußeren Bereich zwei einander gegenüberstehende Kränze Leitschaufeln 22. Die Leitschaufeln 21 , 22 begrenzen in dem Laufrad 13 angeordnete Schaufelkammern 23, 24. Der radial innere Kranz der Leitschaufeln 21 ist weiter vom Elektromotor 4 entfernt angeordnet, als die radial äußeren Kränze der Leitschaufeln 22. Einander gegenüberstehende Schaufelkammern 24 der radial äußeren Kränze der Leitschaufeln 22 sind untereinander verbunden. Im Bereich der Kränze der Leitschaufeln 21 , 22 sind in dem Pumpengehäuse 14 jeweils teilringförmige Kanäle 25, 26 angeordnet. Die teilringförmigen Kanäle 25, 26 bilden mit den Schaufelkammern 23, 24 jeweils sich von einem der Einlaßkanäle 7, 8 bis zu einem der Auslaßkanäle 9, 10 erstreckende Förderkammern 27, 28. Bei einer Drehung des Laufrades 13 fördert die Förderpumpe 3 Kraftstoff aus dem Kraftstoffbehälter 1 durch die radial innere Förderkammer 27 in den Schwalltopf 2 und durch die radial äußere Förderkammer 28 aus dem Schwalltopf 2 durch den Elektromotor 4 zu einer nicht dargestellten Brennkraftmaschine des Kraftfahrzeuges.The impeller 13 has a radially inner ring of guide vanes 21 and two mutually opposing rings in its radially outer region Guide vanes 22. The guide vanes 21, 22 delimit vane chambers 23, 24 arranged in the impeller 13. The radially inner ring of the guide vanes 21 is arranged further away from the electric motor 4 than the radially outer rings of the guide vanes 22 Wreaths of the guide vanes 22 are interconnected. In the area of the rings of the guide vanes 21, 22, partially annular channels 25, 26 are arranged in the pump housing 14. The partially annular channels 25, 26 form with the blade chambers 23, 24 each of one of the inlet channels 7, 8 to one of the outlet channels 9, 10 extending delivery chambers 27, 28. When the impeller 13 rotates, the delivery pump 3 delivers fuel from the fuel tank 1 through the radially inner delivery chamber 27 into the baffle 2 and through the radially outer delivery chamber 28 out of the baffle 2 through the electric motor 4 to an internal combustion engine (not shown) of the motor vehicle.
Der Auslaßkanal 9 der radial inneren Förderkammer 27 ist durch einen Steg 29 radial nach außen geführt. Der umlaufende Bund 20 steht einem Absatz 30 des Pumpengehäuses 14 mit geringem Abstand gegenüber. Dieser Bereich dient damit als Dichtspalt, der ein Überströmen von Kraftstoff zwischen unterschiedliche Drücke aufweisenden Förderkammern 27, 28 weitgehend verhindert. Die Einlaßkanäle 7, 8 und die Auslaßkanäle 9, 10 sind zur Vereinfachung der Zeichnung einander gegenüberstehend angeordnet. Selbstverständlich können sich die teilringförmigen Kanäle 25, 26 auch über einen größeren Winkelbereich erstrecken.The outlet channel 9 of the radially inner delivery chamber 27 is guided radially outwards by a web 29. The circumferential collar 20 is opposite a shoulder 30 of the pump housing 14 with a small distance. This area thus serves as a sealing gap, which largely prevents fuel from flowing over between delivery chambers 27, 28 having different pressures. The inlet channels 7, 8 and the outlet channels 9, 10 are arranged opposite one another to simplify the drawing. Of course, the partially annular channels 25, 26 can also extend over a larger angular range.
Figur 2 zeigt eine Ansicht auf das untere Gehäuseteil 17 des Pumpengehäuses 14 von dem Laufrad 13 aus Figur 1 aus gesehen. Hierbei ist zu erkennen, daß sich die teilringförmigen Kanäle 25, 26 über einen Winkelbereich von ungefähr 300° erstrecken. FIG. 2 shows a view of the lower housing part 17 of the pump housing 14 as seen from the impeller 13 from FIG. 1. It can be seen here that the partially annular channels 25, 26 extend over an angular range of approximately 300 °.

Claims

Patentansprüche claims
1. Förderpumpe, welche insbesondere zur Anordnung in einem Schwalltopf eines Kraftstoffbehälters eines Kraftfahrzeuges vorgesehen ist, mit einem angetriebenen, sich in einem Pumpengehäuse drehenden Laufrad, mit mehreren einander konzentrisch umschließenden Kränzen Schaufelkammern begrenzende Leitschaufeln und mit in dem Pumpengehäuse angeordneten, den Kränzen der Schaufelkammern gegenüberstehenden teilringförmigen, sich von einem Einlaßkanal bis zu einem Auslaßkanal erstreckenden Kanälen, dadurch gekennzeichnet, daß das Laufrad (13) in axialer Richtung mehrere Ebenen (18, 19) aufweist, daß zumindest zwei Kränze der Leitschaufeln (21 , 22) auf zwei unterschiedlichen Ebenen (18, 19) angeordnet sind.1. Delivery pump, which is provided in particular for arrangement in a baffle of a fuel tank of a motor vehicle, with a driven impeller rotating in a pump housing, with a plurality of concentrically surrounding rings of vane chambers and guide vanes arranged in the pump housing and opposing the rings of the vane chambers Partially annular channels extending from an inlet channel to an outlet channel, characterized in that the impeller (13) has a plurality of planes (18, 19) in the axial direction, that at least two rings of the guide vanes (21, 22) on two different planes ( 18, 19) are arranged.
2. Förderpumpe nach Anspruch 1 , dadurch gekennzeichnet, daß das Laufrad (13) einen umlaufenden Bund (20) zur Trennung der unterschiedlichen Ebenen (18, 19) und das Pumpengehäuse (14) einen dem Bund (20) entsprechenden Absatz (30) aufweist.2. Feed pump according to claim 1, characterized in that the impeller (13) has a circumferential collar (20) for separating the different levels (18, 19) and the pump housing (14) has a shoulder (30) corresponding to the collar (20) ,
3. Förderpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Bund (20) zylindrisch gestaltet ist.3. Feed pump according to claim 1 or 2, characterized in that the collar (20) is cylindrical.
4. Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Einlaßkanal (7) oder der Auslaßkanal (9) des radial inneren teilringförmigen Kanals (25) radial nach außen durch einen Steg (29) im Pumpengehäuse (14) zwischen dem Auslaßkanal (10) und dem Einlaßkanal (8) des radial äußeren teilringförmigen Kanals (26) geführt ist.4. Feed pump according to at least one of the preceding claims, characterized in that the inlet channel (7) or the outlet channel (9) of the radially inner part-annular channel (25) radially outwards through a web (29) in the pump housing (14) between the outlet channel (10) and the inlet channel (8) of the radially outer part-annular channel (26) is guided.
5. Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Ebene (18) des radial inneren Kranzes der Leitschaufeln (21 ) einen größeren Abstand von einem das Laufrad (13) antreibenden Elektromotor (4) hat als die Ebene (19) des radial äußeren Kranzes der Leitschaufeln (22). 5. Feed pump according to at least one of the preceding claims, characterized in that the plane (18) of the radially inner ring of the guide vanes (21) is at a greater distance from an electric motor (4) driving the impeller (13) than the plane (19) the radially outer rim of the guide vanes (22).
6. Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Laufrad (13) im Bereich des radial inneren Kranzes der Leitschaufeln (21) dicker ist, als im Bereich des radial äußeren Kranzes der Leitschaufeln (22).6. Feed pump according to at least one of the preceding claims, characterized in that the impeller (13) in the region of the radially inner ring of the guide vanes (21) is thicker than in the region of the radially outer ring of the guide vanes (22).
7. Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schaufelkammern (23) des radial inneren Kranzes der Leitschaufeln (21) ungefähr den doppelten Durchmesser der Schaufelkammern (24) des radial äußeren Kranzes der Leitschaufeln (22) aufweisen.7. Feed pump according to at least one of the preceding claims, characterized in that the vane chambers (23) of the radially inner ring of the guide vanes (21) have approximately twice the diameter of the vane chambers (24) of the radially outer ring of the guide vanes (22).
8. Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Laufrad (13) seinen Stirnseiten im radial äußeren Bereich einander gegenüberstehende Kränze von Leitschaufeln (22) und untereinander verbundene Schaufelkammern (24) aufweist. 8. Feed pump according to at least one of the preceding claims, characterized in that the impeller (13) has its end faces in the radially outer region of opposing rings of guide vanes (22) and interconnected vane chambers (24).
EP01933662A 2000-04-20 2001-03-06 Feed pump Withdrawn EP1192359A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10019911 2000-04-20
DE10019911A DE10019911A1 (en) 2000-04-20 2000-04-20 Feed pump esp. in surge chamber of motor vehicle fuel tank has rotor with several planes and rings of guide blades located in different planes
PCT/EP2001/002489 WO2001081767A1 (en) 2000-04-20 2001-03-06 Feed pump

Publications (1)

Publication Number Publication Date
EP1192359A1 true EP1192359A1 (en) 2002-04-03

Family

ID=7639660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01933662A Withdrawn EP1192359A1 (en) 2000-04-20 2001-03-06 Feed pump

Country Status (9)

Country Link
US (1) US6425734B2 (en)
EP (1) EP1192359A1 (en)
JP (1) JP2003532009A (en)
KR (1) KR20020022709A (en)
CN (1) CN1383474A (en)
AU (1) AU760732B2 (en)
BR (1) BR0106081A (en)
DE (1) DE10019911A1 (en)
WO (1) WO2001081767A1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062451A1 (en) * 2000-12-14 2002-06-20 Siemens Ag feed pump
US6932562B2 (en) * 2002-06-18 2005-08-23 Ti Group Automotive Systems, L.L.C. Single stage, dual channel turbine fuel pump
US7037066B2 (en) 2002-06-18 2006-05-02 Ti Group Automotive Systems, L.L.C. Turbine fuel pump impeller
JP4271501B2 (en) 2003-06-06 2009-06-03 愛三工業株式会社 Fuel pump
KR100568547B1 (en) * 2003-07-28 2006-04-07 현담산업 주식회사 Turbine-type Fuel Pump For Automobile Having An Improved Shape of Impeller
JP2005113686A (en) * 2003-10-02 2005-04-28 Aisan Ind Co Ltd Fuel pump
US7165932B2 (en) * 2005-01-24 2007-01-23 Visteon Global Technologies, Inc. Fuel pump having dual single sided impeller
US7632060B2 (en) * 2005-01-24 2009-12-15 Ford Global Technologies, Llc Fuel pump having dual flow channel
JP4552906B2 (en) * 2006-02-24 2010-09-29 株式会社デンソー Fuel supply device
JP4832156B2 (en) * 2006-05-09 2011-12-07 愛三工業株式会社 Fuel pump
US20080138189A1 (en) * 2006-12-06 2008-06-12 Denso Corporation Fuel pump and fuel feed apparatus having the same
JP2008163934A (en) * 2006-12-06 2008-07-17 Denso Corp Fuel pump and fuel feed apparatus using the same
JP4867733B2 (en) * 2007-03-16 2012-02-01 株式会社デンソー Fuel pump
DE102008040390A1 (en) 2007-07-23 2009-01-29 Denso Corp., Kariya-shi Fuel supply system
DE102008041769A1 (en) * 2007-09-03 2009-03-05 Denso Corporation, Kariya Impeller, fuel pump with the impeller and fuel supply unit with the fuel pump
DE102010004379A1 (en) * 2009-12-16 2011-06-22 Continental Automotive GmbH, 30165 Fuel pump
US9249806B2 (en) 2011-02-04 2016-02-02 Ti Group Automotive Systems, L.L.C. Impeller and fluid pump
CN109488600A (en) * 2018-12-17 2019-03-19 哈尔滨电气动力装备有限公司 The small flow test of core main pump assists impeller unit
CN114483594B (en) * 2021-12-28 2023-07-25 中国航空工业集团公司金城南京机电液压工程研究中心 Double-end multistage multifunctional integrated fuel pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112762A1 (en) * 1971-03-17 1972-10-12 Klein Schanzlin & Becker Ag Side channel pump, especially vortex pump
DE3223868A1 (en) * 1982-06-25 1983-12-29 Friedrich 8541 Röttenbach Schweinfurter TURBINE PUMP
DE3303460A1 (en) * 1983-02-02 1984-08-02 Friedrich 8541 Röttenbach Schweinfurter SELF-PRIMING SIDE CHANNEL PUMP
DE3427112A1 (en) * 1984-07-23 1986-01-23 Friedrich 8541 Röttenbach Schweinfurter SIDE CHANNEL PUMP WITH FORCE COMPENSATION
JPS61190191A (en) * 1985-02-20 1986-08-23 Automob Antipollut & Saf Res Center Motor-driven fuel pump for car
US5110265A (en) * 1991-01-16 1992-05-05 Aisan Kogyo Kabushiki Kaisha Fuel pump
US5596970A (en) * 1996-03-28 1997-01-28 Ford Motor Company Fuel pump for an automotive fuel delivery system
DE19725249C2 (en) 1997-06-14 2002-05-02 Siemens Ag feed pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0181767A1 *

Also Published As

Publication number Publication date
DE10019911A1 (en) 2001-10-25
KR20020022709A (en) 2002-03-27
CN1383474A (en) 2002-12-04
JP2003532009A (en) 2003-10-28
AU6009701A (en) 2001-11-07
US20020004000A1 (en) 2002-01-10
AU760732B2 (en) 2003-05-22
BR0106081A (en) 2002-03-05
US6425734B2 (en) 2002-07-30
WO2001081767A1 (en) 2001-11-01

Similar Documents

Publication Publication Date Title
EP1192359A1 (en) Feed pump
DE3303352A1 (en) AGGREGATE FOR PROMOTING FUEL, PREFERABLY FROM A STORAGE TANK FOR THE INTERNAL COMBUSTION ENGINE, ESPECIALLY A MOTOR VEHICLE
EP1417110B1 (en) Pump unit arranged in an inner tank of a fuel tank of a motor vehicle
EP0934466A1 (en) Feed pump
EP0884479A1 (en) Feed pump
WO2002020974A1 (en) Filter module for a fuel conveying unit and fuel conveying unit for a motor vehicle
EP1103723B1 (en) Fuel pump
DE4221184A1 (en) Fuel delivery pump for vehicle IC engine - uses space between impeller and delivery channel to control direction of flow
DE4304334A1 (en) Unit for delivering fuel from a storage tank to the internal combustion engine of a motor vehicle
EP0772743B1 (en) Fluid pump
EP1131560B1 (en) Side channel pump
EP1664543A1 (en) Fuel pump for a fuel tank
EP1021655B1 (en) Delivery pump
EP2513483B1 (en) Fuel pump
EP2776722B1 (en) Centrifugal pump for delivering liquids in a motor vehicle
DE10054590B4 (en) Automobile fuel pump has 2 concentric feed chambers for feeding fuel to engine and to suction pump simultaneously
WO2008148627A1 (en) Fuel pump
WO2009043765A1 (en) Fuel pump for delivering fuel from a reservoir to an internal combustion engine
EP2754344B1 (en) Flow engine for liquids
EP2148990B1 (en) Conveying unit
EP1105649A1 (en) Liquid pump, especially for delivering fuel
EP2946116A1 (en) Side-channel pump with asymmetrical cross-sections of the side channels

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20011213

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

R17P Request for examination filed (corrected)

Effective date: 20020109

RBV Designated contracting states (corrected)

Designated state(s): DE ES FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040331