EP0294573A1 - Fuel delivery side channel pump - Google Patents

Fuel delivery side channel pump Download PDF

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Publication number
EP0294573A1
EP0294573A1 EP88106477A EP88106477A EP0294573A1 EP 0294573 A1 EP0294573 A1 EP 0294573A1 EP 88106477 A EP88106477 A EP 88106477A EP 88106477 A EP88106477 A EP 88106477A EP 0294573 A1 EP0294573 A1 EP 0294573A1
Authority
EP
European Patent Office
Prior art keywords
side channel
pump
channel
fuel delivery
delivery side
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Withdrawn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
EP88106477A
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German (de)
French (fr)
Inventor
Bernhard Radermacher
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP0294573A1 publication Critical patent/EP0294573A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D31/00—Pumping liquids and elastic fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
    • 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
    • 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
    • F04D5/007—Details of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/50—Inlet or outlet
    • F05B2250/503—Inlet or outlet of regenerative pumps

Definitions

  • the invention relates to a side channel pump for fuel delivery in motor vehicles according to the preamble of the claim.
  • Such a side channel pump is known, for example, from German Utility Model 84 19 971, in which the problem is already addressed that the necessary delivery rate is not achieved when the pump delivers warm fuel, since then a lot of gas is contained in the fuel.
  • This problem is supposed to be caused by an outlet opening with two regions of different widths, of which the narrower outer region projects more into a sealing surface between the inlet and outlet than the inner region. With this construction, a larger flow rate should be achieved.
  • the object of the invention is to design a generic side channel pump in such a way that an accumulation of gas in the suction channel can be avoided and a high delivery rate can be achieved.
  • the drawing shows a figure of the side channel pump 1 according to the invention consisting of a housing 2, a pump wheel 3 which is driven by a motor shaft 4, two side channels 6, 7 being arranged in the housing 2 on both sides of the pump wheel 3 equipped with vanes 5.
  • a suction channel 8 opens axially into the side channel 6, through which the pumped medium is sucked into the side channels 6, 7 and can flow out through an outlet (not shown) at the end of the annular side channel 7.
  • the opening cross-section 9 of the suction channel 8 in the side channel 6 is delimited radially by the outer wall 10 of a hub 11 supporting the pump wheel 3 and the wall 12 of the side channel 6 approximately in the course of the side channel center 13 (average channel diameter).
  • the known vortex formation of the delivery medium is generated by the different centrifugal forces or pressure differences prevailing in the vane cells 14 and the side channels 6, 7, the vortices being identified by arrows.
  • the gas Due to the radial delimitation of the cross-section 9 through the wall 12 of the side channel 6 approximately in the course of the side channel center 13 (average channel diameter), the gas is guided in the direction of the cross-section 9 and is returned to the side channel 6 or the vane cells by the inflowing delivery medium 14 promoted the pump wheel 3, where it is then removed from the mouth area by the spiral movement of the vertebrae.
  • a narrowing of the mouth cross-section 9 can be avoided by pulling the mouth cross-section 9 down to the outer wall 10 of the hub 11.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The side duct pump has an intake duct, the cross-section of whose mouth as it enters the side duct is limited radially outwards by the wall of the side duct centre. <IMAGE>

Description

Die Erfindung betrifft eine Seitenkanalpumpe zur Brennstofförderung in Kraft­fahrzeugen nach dem Oberbegriff des Patentanspruchs.The invention relates to a side channel pump for fuel delivery in motor vehicles according to the preamble of the claim.

Eine derartige Seitenkanalpumpe ist zum Beispiel aus dem Deutschen Gebrauchs­muster 84 19 971 bekannt, in dem bereits das Problem angesprochen wird, daß die nötige Fördermenge nicht erreicht wird, wenn die Pumpe warmen Brennstoff fördert, da dann viel Gas im Brennstoff enthalten ist. Dieses Problem soll durch eine Austrittsöffnung mit zwei Bereichen unterschiedlicher Breiten, wo­von der schmälere äußere Bereich mehr in eine Dichtfläche zwischen Einlaß und Austritt hineinragt als der innere Bereich. Mit dieser Konstruktion soll sich eine größere Fördermenge erzielen lassen.Such a side channel pump is known, for example, from German Utility Model 84 19 971, in which the problem is already addressed that the necessary delivery rate is not achieved when the pump delivers warm fuel, since then a lot of gas is contained in the fuel. This problem is supposed to be caused by an outlet opening with two regions of different widths, of which the narrower outer region projects more into a sealing surface between the inlet and outlet than the inner region. With this construction, a larger flow rate should be achieved.

Umfangreiche Versuchsreihen ergaben jedoch keine signifikanten Verbesserungen des Förderverhaltens derartiger Seitenkanalpumpen.Extensive test series, however, did not show any significant improvements in the delivery behavior of such side channel pumps.

Aus der 1977 im Springer Verlag erschienenen 13. Auflage des Buches 'Die Pum­pen', Seite 282, ist allgemein bekannt, daß sich bei einer derartigen Pumpe mit zwei Seitenkanälen senkrecht zur Mittelebene des Flügelrades in jedem Sei­tenkanal eingreifende Wirbel des Fördermediums bilden, die durch die Drehbewe­gung des Pumpenrades in Umlaufrichtung shcraubenförmig entgegengesetzt drehend umlaufen und sich in der Mittelebene des Flügelrades treffen.From the 13th edition of the book 'Die Pumpen', page 282, published by Springer Verlag in 1977, it is generally known that in such a pump with two side channels perpendicular to the median plane of the impeller, each of the side channels engages in vortices of the pumping medium caused by the Rotate the pump impeller in the circumferential direction in a screw-like, counter-rotating manner and meet in the center plane of the impeller.

Überlegungen und bestätigende Versuche ergaben, daß Gas bereits im axial ein­mündenden Saugkanal austritt und sich in diesem sammelt, da Gasblasen durch die im Einlaßbereich bestehenden Wirbel des Fördermediums wieder in den Saug­kanal zurückgeführt werden.Considerations and confirming experiments have shown that gas already emerges in the axially opening suction channel and collects in it, since gas bubbles are returned to the suction channel through the vortices of the conveying medium in the inlet area.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine gattungsbil­dende Seitenkanalpumpe derart zu gestalten, daß eine Ansammlung von Gas im Saugkanal vermieden und eine hohe Fördermenge erreicht werden können.Proceeding from this, the object of the invention is to design a generic side channel pump in such a way that an accumulation of gas in the suction channel can be avoided and a high delivery rate can be achieved.

Diese Aufgabe ist durch die im Kennzeichen des Patentanspruchs genannten Merk­male gelöst. Vorteile der Erfindung gehen aus der nachfolgenden Beschreibung eines Ausführungsbeispiels in Verbindung mit einer Zeichnung hervor.This object is achieved by the features mentioned in the characterizing part of the patent claim. Advantages of the invention emerge from the following description of an exemplary embodiment in conjunction with a drawing.

Die Zeichnung zeigt eine Figur der erfindungsgemäßen Seitenkanalpumpe 1 be­stehend aus einem Gehäuse 2, einem Pumpenrad 3, das von einer Motorwelle 4 an­getrieben wird, wobei im Gehäuse 2 zwei beiderseits des mit Flügeln 5 ausgestatteten Pumpenrades 3 Seitenkanäle 6, 7 angeordnet sind. In den Seitenkanal 6 mündet axial ein Saugkanal 8 ein, durch den das Förderme­dium in die Seitenkanäle 6, 7 gesaugt wird und durch einen nicht dargestellten Auslaß am Ende des ringförmigen Seitenkanals 7 abfließen kann. Der Einmünde­querschnitt 9 des Saugkanals 8 in den Seitenkanal 6 wird radial von der Außen­wandung 10 einer das Pumpenrad 3 lagernden Nabe 11 und der Wandung 12 des Sei­tenkanals 6 in etwa im Verlauf der Seitenkanalmitte 13 (mittlerer Kanaldurchmesser) begrenzt.The drawing shows a figure of the side channel pump 1 according to the invention consisting of a housing 2, a pump wheel 3 which is driven by a motor shaft 4, two side channels 6, 7 being arranged in the housing 2 on both sides of the pump wheel 3 equipped with vanes 5. A suction channel 8 opens axially into the side channel 6, through which the pumped medium is sucked into the side channels 6, 7 and can flow out through an outlet (not shown) at the end of the annular side channel 7. The opening cross-section 9 of the suction channel 8 in the side channel 6 is delimited radially by the outer wall 10 of a hub 11 supporting the pump wheel 3 and the wall 12 of the side channel 6 approximately in the course of the side channel center 13 (average channel diameter).

Bei Drehung des Pumpenrades 3 wird die bekannte Wirbelbildung des Förderme­diums durch die in den Flügelzellen 14 und den Seitenkanälen 6, 7 herrschenden unterschiedlichen Fliehkräfte bzw. Druckunterschiede erzeugt, wobei die Wirbel durch Pfeile gekennzeichnet sind.When the pump wheel 3 rotates, the known vortex formation of the delivery medium is generated by the different centrifugal forces or pressure differences prevailing in the vane cells 14 and the side channels 6, 7, the vortices being identified by arrows.

Sofern Gas im Saugkanal 8 auftritt, wird dieses mit dem Fördermedium in den Seitenkanal 6 gesaugt und ebenfalls durch die Drehbewegung des Pumpenrades 3 in schraubenförmige Drehbewegung gebracht, wie es durch die Wirbelpfeile ange­deutet ist. Hierbei stößt das Gas gegen den entgegengesetzt verlaufenden Wir­bel des Seitenkanals 7 und wird am äußeren Umfang 15 des Pumpenrades 3 bzw. des Seitenkanals 6 wieder in den Seitenkanal 6 zurückgedrückt. Bisher ent­spricht die Pumpenwirkung dem behandelten Stand der Technik.If gas occurs in the suction channel 8, this is sucked into the side channel 6 with the pumped medium and likewise brought into a helical rotary motion by the rotary movement of the pump wheel 3, as is indicated by the swirl arrows. Here, the gas strikes the opposite vortex of the side channel 7 and is pressed back into the side channel 6 on the outer circumference 15 of the pump wheel 3 or the side channel 6. So far, the pump effect corresponds to the treated state of the art.

Durch die radiale Begrenzung des Einmündequerschnitts 9 durch die Wandung 12 des Seitenkanals 6 in etwa im Verlauf der Seitenkanalmitte 13 (mittlerer Kanaldurchmesser) wird das Gas in Richtung auf den Einmündequerschnitt 9 geführt und wird durch das einströmende Fördermedium wieder in den Seitenkanal 6 bzw. die Flügelzellen 14 des Pumpenrades 3 gefördert, wo es dann durch die spiralförmige Bewegung der Wirbel aus dem Einmündebereich abgeführt wird. Eine Einengung des Einmündungsquerschnitts 9 ist durch Herabziehen des Einmünde­querschnittes 9 bis auf die Außenwandung 10 der Nabe 11 vermeidbar.Due to the radial delimitation of the cross-section 9 through the wall 12 of the side channel 6 approximately in the course of the side channel center 13 (average channel diameter), the gas is guided in the direction of the cross-section 9 and is returned to the side channel 6 or the vane cells by the inflowing delivery medium 14 promoted the pump wheel 3, where it is then removed from the mouth area by the spiral movement of the vertebrae. A narrowing of the mouth cross-section 9 can be avoided by pulling the mouth cross-section 9 down to the outer wall 10 of the hub 11.

Mit der Erfindung ist eine wesentliche Verbesserung des Förderverhaltens die­ser Seitenkanalpumpen insbesondere beim Einsatz zur Förderung von leichtsie­denden Brennstoffen erreicht worden. Damit ist deren Einsatz auch in Kraftfahrzeuge möglich geworden.With the invention, a substantial improvement in the delivery behavior of these side channel pumps has been achieved, in particular when used to deliver low-boiling fuels. This has made their use in motor vehicles possible.

Claims (1)

Seitenkanalpumpe zur Brennstofförderung in Kraftfahrzeugen mit zwei beider­seits eines Pumpenrades mit Flügeln angeordneten Seitenkanälen, mit in einen der Seitenkanäle axial einmündenden Saugkanal, dadurch gekennzeichnet, daß der Einmündequerschnitt (9) des Saugkanals (8) in den Seitenkanal (6) radial nach außen von der Wandung (12) des Seitenkanals (6) in etwa im Verlauf der Sei­tenkanalmitte (13) begrenzt ist.Side channel pump for fuel delivery in motor vehicles with two side channels arranged on both sides of a pump wheel with vanes, with suction channel opening axially into one of the side channels, characterized in that the cross-section (9) of the suction channel (8) into the side channel (6) radially outwards from the wall (12) of the side channel (6) is limited approximately in the course of the side channel center (13).
EP88106477A 1987-06-12 1988-04-22 Fuel delivery side channel pump Withdrawn EP0294573A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873719621 DE3719621A1 (en) 1987-06-12 1987-06-12 SIDE CHANNEL PUMP FOR FUEL CHANGE
DE3719621 1987-06-12

Publications (1)

Publication Number Publication Date
EP0294573A1 true EP0294573A1 (en) 1988-12-14

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ID=6329551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106477A Withdrawn EP0294573A1 (en) 1987-06-12 1988-04-22 Fuel delivery side channel pump

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EP (1) EP0294573A1 (en)
DE (1) DE3719621A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694049A1 (en) * 1992-06-09 1994-01-28 Walbro Corp Fuel pump for internal combustion engine.
WO2001098664A1 (en) * 2000-06-21 2001-12-27 Siemens Aktiengesellschaft Side channel pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL84248C (en) * 1900-01-01
US2496496A (en) * 1946-02-15 1950-02-07 Thompson Prod Inc Turbine pump
FR59262E (en) * 1949-03-09 1954-05-24 Multi-stage wheel for turbo-machines
DE3130286A1 (en) * 1981-07-31 1983-02-17 Robert Bosch Gmbh, 7000 Stuttgart Pump for delivering fuel from a storage tank to an internal-combustion engine
DE3509374A1 (en) * 1985-03-15 1986-09-25 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR PROMOTING FUEL FROM A STORAGE TANK TO THE INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL84248C (en) * 1900-01-01
US2496496A (en) * 1946-02-15 1950-02-07 Thompson Prod Inc Turbine pump
FR59262E (en) * 1949-03-09 1954-05-24 Multi-stage wheel for turbo-machines
DE3130286A1 (en) * 1981-07-31 1983-02-17 Robert Bosch Gmbh, 7000 Stuttgart Pump for delivering fuel from a storage tank to an internal-combustion engine
DE3509374A1 (en) * 1985-03-15 1986-09-25 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR PROMOTING FUEL FROM A STORAGE TANK TO THE INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694049A1 (en) * 1992-06-09 1994-01-28 Walbro Corp Fuel pump for internal combustion engine.
WO2001098664A1 (en) * 2000-06-21 2001-12-27 Siemens Aktiengesellschaft Side channel pump

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Publication number Publication date
DE3719621A1 (en) 1988-12-29

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