EP1861625A1 - Jet suction pump - Google Patents

Jet suction pump

Info

Publication number
EP1861625A1
EP1861625A1 EP06704618A EP06704618A EP1861625A1 EP 1861625 A1 EP1861625 A1 EP 1861625A1 EP 06704618 A EP06704618 A EP 06704618A EP 06704618 A EP06704618 A EP 06704618A EP 1861625 A1 EP1861625 A1 EP 1861625A1
Authority
EP
European Patent Office
Prior art keywords
pot
jet pump
suction
suction jet
mixing tube
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
EP06704618A
Other languages
German (de)
French (fr)
Other versions
EP1861625B1 (en
Inventor
Klaus Markefka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens VDO Automotive AG
VDO Automotive 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 VDO Automotive AG, VDO Automotive AG filed Critical Siemens VDO Automotive AG
Publication of EP1861625A1 publication Critical patent/EP1861625A1/en
Application granted granted Critical
Publication of EP1861625B1 publication Critical patent/EP1861625B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/464—Arrangements of nozzles with inversion of the direction of flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86348—Tank with internally extending flow guide, pipe or conduit

Definitions

  • the invention relates to a suction jet pump with amaschinestrahldüse, a mixing tube, a suction port, a suction line connected thereto and a pot in which at least a portion of the mixing tube is arranged.
  • the suction ⁇ jet pump is used to convey fuel within a fuel tank or from a fuel tank in a swirl pot, which is disposed within the fuel tank.
  • suction jet pumps are arranged at the bottom of the chambers or the areas of the fuel tank, from which the fuel is to be conveyed to the delivery unit. With the arrangement of the suction of the suction jet pump at the bottom of the fuel tank, the suction jet pump is always in the fuel and is therefore always ready for use. Such suction jet pumps are characterized by a good efficiency out.
  • the conveying factor that is to say the ratio of the total jet to the propellant jet, is at least 7.
  • the disadvantage here is that with the blowing agent line to the suction jet pump and the sum line from the suction jet pump two lines are required, which must be routed and fastened in the fuel tank.
  • suction suction jet pumps which are arranged in the region of the conveyor unit. From the suction jet pump leads a suction line in the area from which the fuel is to be conveyed.
  • the suction jet pump has a special ⁇ propulsion.
  • the outlet ⁇ opening of the propulsion jet nozzle is designed as a slot.
  • the propulsion jet is fanned out after emerging from the propulsion jet nozzle.
  • the fanned out propulsion jet closes the mixing tube, whereby the necessary negative pressure is generated in order to be able to suck in the fuel via the relatively long intake line.
  • a suction jet pump which is arranged with the outlet end of the mixing tube in a pot, so that the pumping medium located in the pot seals the mixing tube end against the atmosphere. Through this liquid closure, a negative pressure will be generated at the mixing tube inlet, which contributes to the improvement of the suction power.
  • the suction power is not reached, which suggests that the liquid closure of the mixing tube outlet is not always guaranteed. This can be caused, for example, by the fact that there is too little amount of the pumped liquid in the pot.
  • the present invention is therefore based on the object to provide a suction suction jet pump with an improved delivery factor, the suction power is ensured even under unfavorable circumstances.
  • the suction jet pump should also be simple and compact and easy to assemble.
  • the object is achieved in that the bottom of the pot has a deviating from a plane surface shape.
  • the conveyed medium emerging at high speed from the mixing tube is split or swirled.
  • This turbulence of the medium ensures a permanent and reliable liquid seal of the projecting into the pot outlet opening of the mixing tube, so that in the ejector a suffi ⁇ chender vacuum forming can, which allows the suction of the medium to be conveyed over a long distance.
  • the deviating from a plane surface shape is a depression in the form of a trough or pocket in the bottom region of the pot.
  • the pot bottom is given with arranged on the bottom of the pot ribs.
  • the ribs can be integrally formed on the bottom of the pot, when the pot is made by injection molding.
  • the costs for the production of the recess or the ribs can be reduced if they are arranged in the region of the outlet opening of the mixing tube.
  • the deviating from a plane surface shape is a funnel-shaped bottom surface which extends over the entire bottom portion.
  • the pot is connected in a further embodiment with the suction jet pump.
  • the pot may be formed integrally with the jet pump suction ⁇ , preferably at the mixing tube to be formed.
  • the production of the suction jet pump according to the invention is particularly simple if the pot is connected by means of a latching or plug connection with the suction jet pump. In this way, the pot forms a unit with the suction jet pump.
  • the suction jet pump can thereby be used at any location.
  • pot and suction jet pump designed advantageous if both the suction jet pump and the pot latching or plug-in elements, which engage with each other, are present.
  • the pot and the suction jet pump can be connected in a particularly simple manner if the pot has a groove into which a spring formed on the mixing tube engages.
  • the suction jet pump can convey over the upper edge into the baffle, wherein it is advantageously arranged in the region of the upper edge.
  • the previously intended intake opening in the bottom of the swirl pot is no longer necessary. This also eliminates the valve in the bottom region of the baffle pot, which closes the opening caused by the suction jet pump when the suction jet pump is not in operation.
  • the device according to the invention is particularly simple if the pot is formed by another component or integrated in this component.
  • the pot can be arranged on the swirl pot.
  • the pot is here either formed on the swirl pot or it is attached to the swirl pot.
  • the swirl pot used in this case is particularly simple, if a part of the soil is divided, so that this divided area forming the pot.
  • the swirl pot can have on its outer wall an Anformung, which forms the pot for the suction jet pump.
  • the advantage of these embodiments is that only the suction jet pump must be mounted.
  • FIG. 1 a schematic arrangement of the suction ⁇ jet pump in a fuel tank
  • Fig. 2 the enlarged view of the suction jet pump according to Figure 1
  • Fig. 3 a, b the suction jet pump according to Figure 2
  • Fig. 4, 5 different attachment of the suction jet pump to the pot and
  • Fig. 6 the arrangement of the suction jet pump on a swirl pot.
  • a two chambers 2, 3 existing fuel tank 1 is shown.
  • a delivery unit 4 consisting of a swirl pot 5 and a fuel pump 6 arranged therein, fixed. Via a feed line 7, the funded by the fuel pump 6 fuel is passed to an internal combustion engine, not shown.
  • a pot 8 is attached on the outer wall of the swirl pot 5, a pot 8 is attached.
  • a suction jet pump 9 is arranged to the pot 8, that the mixing tube 10 projects into the pot.
  • fuel is supplied to the suction jet pump 9 from the fuel pump 6.
  • Another line 12 extends from the suction jet pump 9 into the other chamber 2. Via the line 12, fuel is conveyed from the chamber 2 directly into the swirl pot 5.
  • the suction jet pump 9 shown in Figure 2 consists of a propulsion jet nozzle 13, a mixing tube 14, the suction pipe 12 and a pot 8, wherein the pot 8 formed as a lid on Upper edge of the surge pot 5 is arranged. In this case, the pot 8 can also be arranged as a separate component on a capless swirl pot 5.
  • a propulsion jet of the suction jet pump 9 is supplied.
  • a check valve in the propulsion jet line seals it against an idling.
  • the propulsion jet exits through the propulsion jet nozzle 13 and into the mixing tube 14. In the region of the propulsion jet nozzle 13, the suction line 11 opens into the suction ⁇ jet pump 9.
  • the suction jet pump 9 is arranged perpendicular to the axial extent of the mixing tube 14. Furthermore, the suction jet pump 9 is arranged to the pot 8, that the outlet opening 15 of the mixing tube 14 is immersed in the pot 8.
  • the propellant jet passes from the propulsion jet nozzle 13 via the mixing tube 14 into the pot 8.
  • the pot 8 has a bottom 16 with a pocket 17. Upon impinging the jet on the pocket 17, the jet is swirled, thereby sealing the outlet opening 15 and it to a liquid closure in the mixing tube 14 and thus in the suction jet pump 9 comes. Due to the now complete closure of the mixing tube 14 of the propellant jet generates a much greater negative pressure, which in turn is sufficient to promote a larger amount of fuel over a relatively large distance by means of the suction pipe 11 into the pot 8.
  • the suction jet pump 9 with the pot 8 in Figure 3a differs from the embodiment of Figure 2 only in the bottom region of the pot 8.
  • the bottom portion has one piece on the pot 8 on ⁇ shaped ribs 18. These ribs 18 have the same effect as the pocket 17 in FIG. 2. Through them, the jet is swirled in such a way that the liquid closure of the outlet opening 15 of the mixing tube 14 comes about.
  • Both the pocket 17 in Figure 2 and the ribs are each formed only in the region of the mixing tube 14 and not over the entire bottom portion.
  • Figure 3b shows a pot 8 with a funnel-shaped bottom surface 19, which extends over the entire bottom region.
  • the suction jet pump 9 shown in Fig. 4 is connected to the pot 8 via a plug connection.
  • a spring 20 is formed, while the inner wall of the pot 8 has a groove 21 at one point.
  • the spring 20 is inserted into the groove 21.
  • the suction jet pump 9 is positioned to the pot 8.
  • Fig. 5 shows a further embodiment of the attachments of the suction jet pump 9 on the pot 8.
  • locking elements in the form of locking hooks 22 are formed in the region of the outlet opening, which with appropriately trained resting points 23, the pot
  • the pot 8 is not a separate component, but part of the swirl pot 5 of the conveyor unit 4.
  • a wall 25 is formed, which forms the pot 8 together with the wall 26 of the swirl pot 5 ,
  • the mixing tube 14 protrudes with its off ⁇ outlet opening 16 in the pot 8 inside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The invention relates to a jet suction pump (9), comprising a pump fluid nozzle (13) with a round nozzle opening, a mixing tube (14), a suction opening, a suction line (12) arranged thereon and a canister (8), in which at least a part of the mixing tube (14) is arranged. The base (16) of the canister (8) has a non-planar embodiment (17-19).

Description

Beschreibungdescription
Saugstrahlpumpeeductor
Gegenstand der Erfindung ist eine Saugstrahlpumpe mit einer Treibstrahldüse, einem Mischrohr, einer Ansaugöffnung, einer daran angeschlossenen Saugleitung und einem Topf, in dem zumindest ein Teil des Mischrohres angeordnet ist. Die Saug¬ strahlpumpe dient zum Fördern von Kraftstoff innerhalb eines Kraftstoffbehälters oder aus einem Kraftstoffbehälter in einem Schwalltopf, der innerhalb des Kraftstoffbehälters angeordnet ist.The invention relates to a suction jet pump with a Treibstrahldüse, a mixing tube, a suction port, a suction line connected thereto and a pot in which at least a portion of the mixing tube is arranged. The suction ¬ jet pump is used to convey fuel within a fuel tank or from a fuel tank in a swirl pot, which is disposed within the fuel tank.
Es ist bekannt, dass Kraftstoffbehälter vielfältige Formen aufweisen. Mit der Anpassung des Kraftstoffbehälters an dasIt is known that fuel tanks have various shapes. With the adaptation of the fuel tank to the
Kraftfahrzeug unter Nutzung des vorhandenen Bauraumes entstehen Kraftstoffbehälter, die in mehrere Kammern unterteilt sind.Motor vehicle using the available space arise fuel tank, which are divided into several chambers.
Diese Kammern sind größtenteils mit einem Sattel verbunden. Bei derartigen Kraftstoffbehältern tritt das Problem auf, dass der Kraftstoff bei niedrigem Füllstand aus der einen Kammer nicht mehr über den Sattel in die andere Kammer gelangen kann. Da üblicherweise nur eine Fördereinheit in einem Kraftstoffbehälter angeordnet ist, kann der in einer anderen Kammer befindliche Kraftstoff die Fördereinheit nicht erreichen. In diesen Fällen werden Saugstrahlpumpen eingesetzt, um den in anderen Bereichen des Kraftbehälters vorhandene Kraftstoff der Fördereinheit zuzuführen oder den Kraftstoff zumindest in die Kammer oder den Bereich, in dem sich die Fördereinheit befindet, zu fördern.These chambers are mostly connected to a saddle. In such fuel tanks, the problem arises that the fuel at low level from one chamber can not get over the saddle in the other chamber. Since usually only one delivery unit is arranged in a fuel tank, the fuel located in another chamber can not reach the delivery unit. In these cases, suction jet pumps are used to supply the fuel present in other areas of the power tank to the delivery unit or to deliver the fuel at least into the chamber or the area in which the delivery unit is located.
Herkömmliche Saugstrahlpumpen werden am Boden der Kammern oder der Bereiche des Kraftstoffbehälters angeordnet, aus denen der Kraftstoff zur Fördereinheit gefördert werden soll. Mit der Anordnung der Ansaugöffnung der Saugstrahlpumpe am Boden des Kraftstoffbehälters befindet sich die Saugstrahlpumpe immer im Kraftstoff und ist somit immer betriebsbereit. Derartige Saugstrahlpumpen zeichnen sich durch einen guten Wirkungsgrad aus. Der Förderfaktor, das heißt, das Verhältnis von Summenstrahl zu Treibstrahl, liegt mindestens bei 7. Nachteilig hierbei ist, dass mit der Treibmittelleitung zur Saugstrahlpumpe und der Summenleitung von der Saugstrahlpumpe zwei Leitungen erfor- derlich sind, die im Kraftstoffbehälter verlegt und befestigt werden müssen.Conventional suction jet pumps are arranged at the bottom of the chambers or the areas of the fuel tank, from which the fuel is to be conveyed to the delivery unit. With the arrangement of the suction of the suction jet pump at the bottom of the fuel tank, the suction jet pump is always in the fuel and is therefore always ready for use. Such suction jet pumps are characterized by a good efficiency out. The conveying factor, that is to say the ratio of the total jet to the propellant jet, is at least 7. The disadvantage here is that with the blowing agent line to the suction jet pump and the sum line from the suction jet pump two lines are required, which must be routed and fastened in the fuel tank.
Weiterhin ist bekannt, saugende Saugstrahlpumpen zu verwenden, die im Bereich der Fördereinheit angeordnet sind. Von der Saugstrahlpumpe führt eine Saugleitung in dem Bereich, aus dem der Kraftstoff gefördert werden soll. Zur Erzeugung des not¬ wendigen Unterdrucks in der Saugleitung besitzt die Saug¬ strahlpumpe eine spezielle Treibstrahldüse. Die Austritts¬ öffnung der Treibstrahldüse ist als Schlitz ausgeführt. In Folge des Schlitzes wird der Treibstrahl nach dem Austreten aus der Treibstrahldüse aufgefächert. Der aufgefächerte Treibstrahl verschließt das Mischrohr, wodurch der notwendige Unterdruck erzeugt wird, um über die relativ lange Ansaugleitung den Kraftstoff ansaugen zu können. Dadurch ist nur eine statt wie bisher zwei im Kraftstoffbehälter zu verlegende und zu be¬ festigende Leitungen notwendig. Nachteilig bei dieser Aus¬ führungsform ist der niedrige Förderfaktor der saugenden Saugstrahlpumpe, der ungefähr bei 2 liegt. Dieser niedrige Förderfaktor ist bedingt durch das Auffächern des Treibstrahls nach dem Verlassen der Treibstrahldüse.Furthermore, it is known to use suction suction jet pumps, which are arranged in the region of the conveyor unit. From the suction jet pump leads a suction line in the area from which the fuel is to be conveyed. To generate the not ¬ manoeuvrable negative pressure in the suction pipe, the suction jet pump has a special ¬ propulsion. The outlet ¬ opening of the propulsion jet nozzle is designed as a slot. As a result of the slot, the propulsion jet is fanned out after emerging from the propulsion jet nozzle. The fanned out propulsion jet closes the mixing tube, whereby the necessary negative pressure is generated in order to be able to suck in the fuel via the relatively long intake line. As a result, only one instead of two so far in the fuel tank to be laid and to be ¬ festifying lines necessary. The disadvantage leadership in this form from ¬ is the low delivery factor of sucking ejector pump, which is approximately the second This low conveying factor is due to the fanning of the propulsion jet after leaving the Treibstrahldüse.
Es ist weiter eine Saugstrahlpumpe bekannt, die mit dem Austrittsende des Mischrohres in einem Topf angeordnet ist, so dass das im Topf befindliche Fördermedium das Mischrohrende gegen die Atmosphäre abdichtet. Durch diesen Flüssigkeitsverschluß wird am Mischrohreintritt ein Unterdruck erzeugt werden, der zur Verbesserung der Saugleistung beiträgt. Es hat sich jedoch gezeigt, dass unter bestimmten Umständen die Saugleistung nicht erreicht wird, was darauf schließen lässt, dass der Flüssig- keitsverschluß des Mischrohraustritts nicht immer gewährleistet ist. Dies kann beispielsweise dadurch bedingt sein, dass eine zu geringe Menge der geförderten Flüssigkeit im Topf vorhanden ist. Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine saugende Saugstrahlpumpe mit einem verbesserten Förderfaktor zu schaffen, wobei die Saugleistung auch unter ungünstigen Um- ständen gewährleistet ist. Die Saugstrahlpumpe soll darüber hinaus einfach und kompakt aufgebaut und leicht zu montieren sein .It is further known a suction jet pump, which is arranged with the outlet end of the mixing tube in a pot, so that the pumping medium located in the pot seals the mixing tube end against the atmosphere. Through this liquid closure, a negative pressure will be generated at the mixing tube inlet, which contributes to the improvement of the suction power. However, it has been shown that in certain circumstances the suction power is not reached, which suggests that the liquid closure of the mixing tube outlet is not always guaranteed. This can be caused, for example, by the fact that there is too little amount of the pumped liquid in the pot. The present invention is therefore based on the object to provide a suction suction jet pump with an improved delivery factor, the suction power is ensured even under unfavorable circumstances. The suction jet pump should also be simple and compact and easy to assemble.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass der Boden des Topfes eine von einer Planfläche abweichende Gestalt besitzt .According to the invention the object is achieved in that the bottom of the pot has a deviating from a plane surface shape.
Durch diese Gestaltung des Bodens des Topfes wird das mit hoher Geschwindigkeit aus dem Mischrohr austretende geförderte Medium aufgespalten, bzw. verwirbelt. Diese Verwirbelung des Mediums gewährleistet einen dauerhaften und zuverlässigen Flüssigkeitsverschluß der in den Topf hineinragenden Auslassöffnung des Mischrohres, so dass sich in der Saugstrahlpumpe ein ausrei¬ chender Unterdruck ausbilden kann, der das Ansaugen des zu fördernden Mediums über eine weite Strecke ermöglicht.As a result of this design of the bottom of the pot, the conveyed medium emerging at high speed from the mixing tube is split or swirled. This turbulence of the medium ensures a permanent and reliable liquid seal of the projecting into the pot outlet opening of the mixing tube, so that in the ejector a suffi ¬ chender vacuum forming can, which allows the suction of the medium to be conveyed over a long distance.
In einer vorteilhaften Ausgestaltung ist die von einer Planfläche abweichende Gestalt eine Vertiefung in Form einer Mulde oder Tasche im Bodenbereich des Topfes. Eine derartige Ausbildung ist mit geringem Aufwand herstellbar und daher besonders kosten- günstig.In an advantageous embodiment, the deviating from a plane surface shape is a depression in the form of a trough or pocket in the bottom region of the pot. Such a design can be produced with little effort and therefore particularly cost-effective.
Eine ebenso günstig herzustellende Gestaltung des Topfbodens ist mit am Topfboden angeordneten Rippen gegeben. Die Rippen können dabei einteilig am Topfboden angeformt sein, wenn der Topf mittels Spritzgießens hergestellt wird.An equally inexpensive to manufacture design of the pot bottom is given with arranged on the bottom of the pot ribs. The ribs can be integrally formed on the bottom of the pot, when the pot is made by injection molding.
Die Kosten für die Erzeugung der Vertiefung oder der Rippen lassen sich verringern, wenn diese im Bereich der Auslassöffnung des Mischrohres angeordnet sind. In einer anderen Ausgestaltung ist die von einer Planfläche abweichende Gestalt eine trichterförmige Bodenfläche, die sich über den gesamten Bodenbereich erstreckt.The costs for the production of the recess or the ribs can be reduced if they are arranged in the region of the outlet opening of the mixing tube. In another embodiment, the deviating from a plane surface shape is a funnel-shaped bottom surface which extends over the entire bottom portion.
Der Topf ist in einer weiteren Ausgestaltung mit der Saugstrahlpumpe verbunden. Der Topf kann einteilig mit der Saug¬ strahlpumpe, vorzugsweise am Mischrohr, angeformt sein. Die Fertigung der erfindungsgemäßen Saugstrahlpumpe gestaltet sich jedoch besonders einfach, wenn der Topf mittels einer Rast- oder Steckverbindung mit der Saugstrahlpumpe verbunden ist. Auf diese Weise bildet der Topf mit der Saugstrahlpumpe eine Einheit. Die Saugstrahlpumpe ist dadurch an beliebigen Orten einsetzbar.The pot is connected in a further embodiment with the suction jet pump. The pot may be formed integrally with the jet pump suction ¬, preferably at the mixing tube to be formed. However, the production of the suction jet pump according to the invention is particularly simple if the pot is connected by means of a latching or plug connection with the suction jet pump. In this way, the pot forms a unit with the suction jet pump. The suction jet pump can thereby be used at any location.
Die Verbindung von Topf und Saugstrahlpumpe gestaltet sich vorteilhaft, wenn sowohl an der Saugstrahlpumpe als auch am Topf Rast- oder Steckelemente, die ineinander greifen, vorhanden sind. Besonders einfach lassen sich der Topf und die Saugstrahlpumpe verbinden, wenn der Topf eine Nut aufweist, in die eine am Mischrohr angeformte Feder eingreift.The connection of pot and suction jet pump designed advantageous if both the suction jet pump and the pot latching or plug-in elements, which engage with each other, are present. The pot and the suction jet pump can be connected in a particularly simple manner if the pot has a groove into which a spring formed on the mixing tube engages.
Wird die Saugstrahlpumpe zur Befüllung des Schwalltopfes verwendet, kann die Saugstrahlpumpe über den oberen Rand in den Schwalltopf fördern, wobei sie vorteilhafterweise im Bereich des oberen Randes angeordnet ist. Die bisher vorgesehene Ansaug- Öffnung im Boden des Schwalltopfes ist nicht mehr erforderlich. Damit entfällt ebenso das Ventil im Bodenbereich des Schwalltopfes, welches die durch die Saugstrahlpumpe verursachte Öffnung verschließt, wenn die Saugstrahlpumpe nicht in Betrieb ist.If the suction jet pump is used for filling the baffle, the suction jet pump can convey over the upper edge into the baffle, wherein it is advantageously arranged in the region of the upper edge. The previously intended intake opening in the bottom of the swirl pot is no longer necessary. This also eliminates the valve in the bottom region of the baffle pot, which closes the opening caused by the suction jet pump when the suction jet pump is not in operation.
Die erfindungsgemäße Vorrichtung gestaltet sich besonders einfach, wenn der Topf von einem anderen Bauteil gebildet oder in dieses Bauteil integriert ist. So kann der Topf am Schwalltopf angeordnet sein. Der Topf ist hierbei entweder an dem Schwalltopf angeformt oder er wird am Schwalltopf befestigt. Der hierbei verwendete Schwalltopf ist besonders einfach gestaltet, wenn ein Teil des Bodens abgeteilt ist, so dass dieser abgeteilte Bereich den Topf bildet. Ebenso gut kann der Schwalltopf an seiner Außenwandung eine Anformung aufweisen, die den Topf für die Saugstrahlpumpe bildet. Der Vorteil dieser Ausgestaltungen besteht darin, dass lediglich die Saugstrahlpumpe montiert werden muß .The device according to the invention is particularly simple if the pot is formed by another component or integrated in this component. Thus, the pot can be arranged on the swirl pot. The pot is here either formed on the swirl pot or it is attached to the swirl pot. The swirl pot used in this case is particularly simple, if a part of the soil is divided, so that this divided area forming the pot. Just as well, the swirl pot can have on its outer wall an Anformung, which forms the pot for the suction jet pump. The advantage of these embodiments is that only the suction jet pump must be mounted.
An mehreren Ausführungsbeispielen wird die Erfindung näher erläutert. Dabei zeigen die Figuren inIn several embodiments, the invention will be explained in more detail. The figures show in
Fig. 1: eine schematische Anordnung der Saug¬ strahlpumpe in einem Kraftstoffbehälter, Fig. 2: die vergrößerte Darstellung der Saugstrahlpumpe gemäß Figur 1,1: a schematic arrangement of the suction ¬ jet pump in a fuel tank, Fig. 2: the enlarged view of the suction jet pump according to Figure 1,
Fig. 3 a,b: die Saugstrahlpumpe gemäß Figur 2, Fig. 4, 5: verschiedene Befestigung der Saugstrahlpumpe zum Topf undFig. 3 a, b: the suction jet pump according to Figure 2, Fig. 4, 5: different attachment of the suction jet pump to the pot and
Fig. 6: die Anordnung der Saugstrahlpumpe an einem Schwalltopf.Fig. 6: the arrangement of the suction jet pump on a swirl pot.
In Fig. 1 ist ein aus zwei Kammern 2, 3 bestehender Kraftstoffbehälter 1 dargestellt. In dem Kraftstoffbehälter 1 ist eine Fördereinheit 4, bestehend aus einem Schwalltopf 5 und einer darin angeordneten Kraftstoffpumpe 6, befestigt. Über eine Vorlaufleitung 7 wird der von der Kraftstoffpumpe 6 geförderte Kraftstoff zu einer nicht dargestellten Brennkraftmaschine geleitet. An der Außenwand des Schwalltopfes 5 ist ein Topf 8 befestigt. Eine Saugstrahlpumpe 9 ist derart zu dem Topf 8 angeordnet, dass deren Mischrohr 10 in dem Topf hineinragt. Über eine Leitung 11 wird aus der Kraftstoffpumpe 6 Kraftstoff der Saugstrahlpumpe 9 zugeführt. Eine weitere Leitung 12 erstreckt sich von der Saugstrahlpumpe 9 in die andere Kammer 2. Über die Leitung 12 wird Kraftstoff aus der Kammer 2 direkt in den Schwalltopf 5 gefördert.In Fig. 1, a two chambers 2, 3 existing fuel tank 1 is shown. In the fuel tank 1, a delivery unit 4, consisting of a swirl pot 5 and a fuel pump 6 arranged therein, fixed. Via a feed line 7, the funded by the fuel pump 6 fuel is passed to an internal combustion engine, not shown. On the outer wall of the swirl pot 5, a pot 8 is attached. A suction jet pump 9 is arranged to the pot 8, that the mixing tube 10 projects into the pot. Via a line 11, fuel is supplied to the suction jet pump 9 from the fuel pump 6. Another line 12 extends from the suction jet pump 9 into the other chamber 2. Via the line 12, fuel is conveyed from the chamber 2 directly into the swirl pot 5.
Die in der Figur 2 dargestellte Saugstrahlpumpe 9 besteht aus einer Treibstrahldüse 13, einem Mischrohr 14, der Ansaugleitung 12 und einem Topf 8, wobei der Topf 8 als Deckel ausgebildet am oberen Rand des Schwalltopfes 5 angeordnet ist. Dabei kann der Topf 8 auch als separates Bauteil an einem deckellosen Schwalltopf 5 angeordnet sein. Mittels der Treibstrahlleitung 11 wird ein Treibstrahl der Saugstrahlpumpe 9 zugeführt. Ein Rückschlagventil in der Treibstrahlleitung dichtet diese gegen ein Leerlaufen ab. Der Treibstrahl tritt durch die Treibstrahldüse 13 aus und in das Mischrohr 14 ein. Im Bereich der Treibstrahldüse 13 mündet die Ansaugleitung 11 in die Saug¬ strahlpumpe 9. Die Saugstrahlpumpe 9 ist bezüglich der axialen Erstreckung des Mischrohres 14 senkrecht angeordnet. Weiterhin ist die Saugstrahlpumpe 9 derart zu dem Topf 8 angeordnet, dass die Auslassöffnung 15 des Mischrohres 14 in den Topf 8 eintaucht. Der Treibstrahl gelangt aus der Treibstrahldüse 13 über das Mischrohr 14 in den Topf 8. Der Topf 8 besitzt einen Boden 16 mit einer Tasche 17. Beim Auftreffen des Strahls auf die Tasche 17, wird der Strahl verwirbelt, wodurch er die Auslassöffnung 15 abdichtet und es zu einem Flüssigkeitsverschluss im Mischrohr 14 und damit in der Saugstrahlpumpe 9 kommt. Aufgrund des nunmehr vollständigen Verschlusses des Mischrohres 14 erzeugt der Treibstrahl einen wesentlich größeren Unterdruck, der wiederum ausreichend ist, um eine größere Menge an Kraftstoff über eine relativ große Entfernung mittels der Ansaugleitung 11 in den Topf 8 zu fördern.The suction jet pump 9 shown in Figure 2 consists of a propulsion jet nozzle 13, a mixing tube 14, the suction pipe 12 and a pot 8, wherein the pot 8 formed as a lid on Upper edge of the surge pot 5 is arranged. In this case, the pot 8 can also be arranged as a separate component on a capless swirl pot 5. By means of the propulsion jet line 11, a propulsion jet of the suction jet pump 9 is supplied. A check valve in the propulsion jet line seals it against an idling. The propulsion jet exits through the propulsion jet nozzle 13 and into the mixing tube 14. In the region of the propulsion jet nozzle 13, the suction line 11 opens into the suction ¬ jet pump 9. The suction jet pump 9 is arranged perpendicular to the axial extent of the mixing tube 14. Furthermore, the suction jet pump 9 is arranged to the pot 8, that the outlet opening 15 of the mixing tube 14 is immersed in the pot 8. The propellant jet passes from the propulsion jet nozzle 13 via the mixing tube 14 into the pot 8. The pot 8 has a bottom 16 with a pocket 17. Upon impinging the jet on the pocket 17, the jet is swirled, thereby sealing the outlet opening 15 and it to a liquid closure in the mixing tube 14 and thus in the suction jet pump 9 comes. Due to the now complete closure of the mixing tube 14 of the propellant jet generates a much greater negative pressure, which in turn is sufficient to promote a larger amount of fuel over a relatively large distance by means of the suction pipe 11 into the pot 8.
Die Saugstrahlpumpe 9 mit dem Topf 8 in Figur 3a unterscheidet sich von der Ausführung nach Figur 2 lediglich im Bodenbereich des Topfes 8. Der Bodenbereich weist einteilig am Topf 8 an¬ geformte Rippen 18 auf. Diese Rippen 18 haben denselben Effekt wie die Tasche 17 in Figur 2. Durch sie wird der Strahl derart verwirbelt, dass es zum Flüssigkeitsverschluß der Auslassöffnung 15 des Mischrohres 14 kommt. Sowohl die Tasche 17 in Figur 2 als auch die Rippen sind jeweils nur im Bereich des Mischrohres 14 und nicht über den gesamten Bodenbereich ausgebildet. Im Gegensatz dazu zeigt Figur 3b einen Topf 8 mit einer trichter- förmigen Bodenfläche 19, die sich über den gesamten Bodenbereich erstreckt . Die in Fig. 4 gezeigte Saugstrahlpumpe 9 ist mit dem Topf 8 über eine Steckverbindung verbunden. An der Außenseite des Mischrohres 14 ist eine Feder 20 angeformt, während die Innenwandung des Topfes 8 an einer Stelle eine Nut 21 aufweist. Zum Verbinden von Topf 8 und Saugstrahlpumpe 9 wird die Feder 20 in die Nut 21 eingeschoben. Mit Erreichen der unteren Nutbegrenzung ist die Saugstrahlpumpe 9 zum Topf 8 positioniert.The suction jet pump 9 with the pot 8 in Figure 3a differs from the embodiment of Figure 2 only in the bottom region of the pot 8. The bottom portion has one piece on the pot 8 on ¬ shaped ribs 18. These ribs 18 have the same effect as the pocket 17 in FIG. 2. Through them, the jet is swirled in such a way that the liquid closure of the outlet opening 15 of the mixing tube 14 comes about. Both the pocket 17 in Figure 2 and the ribs are each formed only in the region of the mixing tube 14 and not over the entire bottom portion. In contrast, Figure 3b shows a pot 8 with a funnel-shaped bottom surface 19, which extends over the entire bottom region. The suction jet pump 9 shown in Fig. 4 is connected to the pot 8 via a plug connection. On the outside of the mixing tube 14, a spring 20 is formed, while the inner wall of the pot 8 has a groove 21 at one point. To connect pot 8 and suction jet pump 9, the spring 20 is inserted into the groove 21. Upon reaching the lower Nutbegrenzung the suction jet pump 9 is positioned to the pot 8.
Fig. 5 zeigt eine weitere Ausgestaltung für die Befestigungen der Saugstrahlpumpe 9 am Topf 8. Am Mischrohr 14 sind im Bereich der Auslassöffnung 15 Rastelemente in Form von Rasthaken 22 angeformt, die mit entsprechend ausgebildeten Raststellen 23, die am TopfFig. 5 shows a further embodiment of the attachments of the suction jet pump 9 on the pot 8. At the mixing tube 14 15 locking elements in the form of locking hooks 22 are formed in the region of the outlet opening, which with appropriately trained resting points 23, the pot
8 angeformt sind, zusammenwirken. Es ist auch denkbar, die Rasthaken 22 am Topf 8 vorzusehen, während das Mischrohr 14 die notwendigen Raststellen 23 besitzen.8 are formed, cooperate. It is also conceivable to provide the latching hooks 22 on the pot 8, while the mixing tube 14 has the necessary latching points 23.
In der in Fig. 6 gezeigten Ausgestaltung ist der Topf 8 kein separates Bauteil, sondern Bestandteil des Schwalltopfes 5 der Fördereinheit 4. Am Boden 24 des Schwalltopfes 5 ist eine Wand 25 angeformt, die zusammen mit der Wandung 26 des Schwalltopfes 5 den Topf 8 bildet. Das Mischrohr 14 ragt mit seiner Aus¬ lassöffnung 16 in den Topf 8 hinein. Der von der SaugstrahlpumpeIn the embodiment shown in Fig. 6, the pot 8 is not a separate component, but part of the swirl pot 5 of the conveyor unit 4. At the bottom 24 of the swirl pot 5, a wall 25 is formed, which forms the pot 8 together with the wall 26 of the swirl pot 5 , The mixing tube 14 protrudes with its off ¬ outlet opening 16 in the pot 8 inside. The of the suction jet pump
9 geförderte Kraftstoff strömt aus dem Topf 8 direkt in den Schwalltopf 5. Von dort wird der Kraftstoff von der nicht dargestellten Kraftstoffpumpe zur Brennkraftmaschine gefördert. 9 funded fuel flows from the pot 8 directly into the swirl pot 5. From there, the fuel is conveyed from the fuel pump, not shown, to the internal combustion engine.

Claims

Patentansprüche claims
1. Saugstrahlpumpe, bestehend aus einer Treibstrahldüse mit einer runden Düsenöffnung, einem Mischrohr, eine An- Säugöffnung, einer daran angeordneten Saugleitung und einem Topf, in dem zumindest ein Teil des Mischrohres angeordnet ist, dadurch gekennzeichnet, dass der Boden (16) des Topfes (8) eine von einer Planfläche abweichende Gestalt (17-19) besitzt.1. Suction jet pump, consisting of a propulsion jet nozzle with a round nozzle opening, a mixing tube, a suction opening, a suction line arranged thereon and a pot in which at least a part of the mixing tube is arranged, characterized in that the bottom (16) of the pot (8) has a shape deviating from a plane surface (17-19).
2. Saugstrahlpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die von einer Planfläche abweichende Gestalt eine Vertiefung (17) ist.2. Suction jet pump according to claim 1, characterized in that the deviating from a plane surface shape is a recess (17).
3. Saugstrahlpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die von einer Planfläche abweichende Gestalt Rippen (18) sind.3. Suction jet pump according to claim 1, characterized in that the deviating from a plane surface shape ribs (18).
4. Saugstrahlpumpe nach Anspruch 2 oder 3, dadurch ge- kennzeichnet, dass die Vertiefung (17) oder die Rippen (18) des Bodens (16) im Bereich der Auslassöffnung (15) des Mischrohres (14) angeordnet sind.4. Suction jet pump according to claim 2 or 3, character- ized in that the recess (17) or the ribs (18) of the bottom (16) in the region of the outlet opening (15) of the mixing tube (14) are arranged.
5. Saugstrahlpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die von einer Planfläche abweichende Gestalt eine trichterförmige Bodenfläche (19) ist.5. Suction jet pump according to claim 1, characterized in that the deviating from a plane surface shape is a funnel-shaped bottom surface (19).
6. Saugstrahlpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Topf (8) mit der Saugstrahlpumpe (9) verbunden ist.6. Suction jet pump according to at least one of the preceding claims, characterized in that the pot (8) with the suction jet pump (9) is connected.
7. Saugstrahlpumpe nach Anspruch 6, dadurch gekennzeichnet, dass der Topf (8) mit der Saugstrahlpumpe (9) mittels einer Rast- oder Steckverbindung verbunden ist.7. Suction jet pump according to claim 6, characterized in that the pot (8) with the suction jet pump (9) is connected by means of a latching or plug connection.
8. Saugstrahlpumpe nach Anspruch 6, dadurch gekennzeichnet, dass der Topf (8) an der Saugstrahlpumpe (9) angeformt ist. 8. Suction jet pump according to claim 6, characterized in that the pot (8) on the suction jet pump (9) is integrally formed.
9. Saugstrahlpumpe nach Anspruch 8, dadurch gekennzeichnet, dass der Topf (8) mit der Saugstrahlpumpe (9) verschweißt oder verklebt ist.9. Suction jet pump according to claim 8, characterized in that the pot (8) with the suction jet pump (9) is welded or glued.
10. Saugstrahlpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Topf (8) an einem Schwalltopf (5) oder in einem Bereich des Schwalltopfes (5) ausgebildet ist. 10. Suction jet pump according to at least one of the preceding claims, characterized in that the pot (8) is formed on a swirl pot (5) or in a region of the swirl pot (5).
EP06704618.5A 2005-03-24 2006-01-10 Jet suction pump Expired - Fee Related EP1861625B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510014431 DE102005014431B3 (en) 2005-03-24 2005-03-24 Ejector pump for use in fuel tank, has mixer tube whose one portion is arranged in pot, where base of pot includes recess, which deviates from flat surface such that the medium conveyed by tube with high velocity is swirled
PCT/EP2006/050111 WO2006100129A1 (en) 2005-03-24 2006-01-10 Jet suction pump

Publications (2)

Publication Number Publication Date
EP1861625A1 true EP1861625A1 (en) 2007-12-05
EP1861625B1 EP1861625B1 (en) 2015-10-21

Family

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EP06704618.5A Expired - Fee Related EP1861625B1 (en) 2005-03-24 2006-01-10 Jet suction pump

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US (1) US8408880B2 (en)
EP (1) EP1861625B1 (en)
CN (1) CN101147004B (en)
DE (1) DE102005014431B3 (en)
WO (1) WO2006100129A1 (en)

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Also Published As

Publication number Publication date
US8408880B2 (en) 2013-04-02
CN101147004A (en) 2008-03-19
US20080193300A1 (en) 2008-08-14
DE102005014431B3 (en) 2006-08-03
EP1861625B1 (en) 2015-10-21
WO2006100129A1 (en) 2006-09-28
CN101147004B (en) 2011-07-06

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