EP2964961B1 - Pompe à jet aspirante - Google Patents

Pompe à jet aspirante Download PDF

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Publication number
EP2964961B1
EP2964961B1 EP14708245.7A EP14708245A EP2964961B1 EP 2964961 B1 EP2964961 B1 EP 2964961B1 EP 14708245 A EP14708245 A EP 14708245A EP 2964961 B1 EP2964961 B1 EP 2964961B1
Authority
EP
European Patent Office
Prior art keywords
diffuser
jet pump
suction jet
mixing tube
suction
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.)
Active
Application number
EP14708245.7A
Other languages
German (de)
English (en)
Other versions
EP2964961A1 (fr
Inventor
Marc VÖLKER
Andreas Sausner
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
Continental Automotive GmbH
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Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2964961A1 publication Critical patent/EP2964961A1/fr
Application granted granted Critical
Publication of EP2964961B1 publication Critical patent/EP2964961B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04F5/44—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
    • 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
    • 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
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • 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
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids

Definitions

  • the invention relates to a suction jet pump with a propellant conduit, a propulsion jet, a suction, a mixing tube and a diffuser, wherein the propulsion jet nozzle and the mixing tube are aligned with each other in a straight line.
  • Such ejector pumps are known and used for conveying liquids and gases, their main advantage being that they do not require an electromotive drive but are driven by a propellant supplied via the propellant conduit. For this reason, they are used in automobiles for conveying fuel in the fuel tank by being used for redistributing the fuel in the fuel tank or filling flow unit swirl pots.
  • the suction jet pumps are usually driven by a fuel pump by a part of the flow rate of the fuel pump is diverted and used to drive the ejector.
  • the disadvantage of ejector pumps is their relatively low efficiency. For this reason, the dimensioning of the individual components of the ejector pump is of particular importance in order to achieve the greatest possible delivery rate. In particular, the length of the individual components is crucial.
  • the CH 83 025 A discloses a method of stabilizing vapor-jet or gas-jet apparatus provided with at least two stages. In particular, the discontinuity in the promotion is discussed, which occurs when the steam or gas jet apparatuses are used for other compression ratios than those for which they are measured.
  • the DE 14 64 693 C1 discloses a method for forming a forced circulation of the cooling liquid within the pressure vessel of a nuclear reactor. To circulate the cooling water, the principle of operation of a suction jet pump is used.
  • the invention has for its object to provide a suction jet pump with high efficiency, which is also used in the drive by means of a demand-controlled fuel pump with limited space.
  • the suction jet pump according to the invention has amaschinestrahldüse and a mixing tube, which are aligned in a straight line to each other.
  • the diffuser arranged downstream of the mixing tube has a course deviating from the rectilinear course of the mixing tube. Due to its deviating from the mixing tube course the total length of the suction jet pump is reduced, so that the suction jet pump can be used even with limited space. With the deviating course of the diffuser its orientation, but not its length is changed. Thus, on the one hand the diffuser can maintain its required length. With the retention of its required Length is important for the efficiency of pressure increase in the diffuser generated in order to minimize the pressure difference to the ambient pressure.
  • the mixing tube can retain its particularly important required for the efficiency required length, without the use of the ejector would be impaired in a limited space.
  • this adjustment of the ejector allows for a limited space the drive through a demand-controlled fuel pump, as due to the unnecessary length reduction of individual components of the ejector no enlargement of the nozzle cross-section is necessary, which have a negative effect on the efficiency of the ejector, especially in driving situations with low fuel consumption would.
  • a slight influence on the flow is achieved with a diffuser having a curved course.
  • the suction jet pump is optimally adapted to the available space, since the curvature of the diffuser can be in all directions.
  • the impairment of the efficiency is kept within narrow limits. Often even small bends are sufficient to better exploit the available space.
  • the curvature may extend over the entire length of the diffuser or only over part of the length, depending on the conditions of use.
  • a particularly small effect on the efficiency is achieved with a suction jet pump, in which a deflecting element is arranged between the mixing tube and diffuser.
  • This embodiment has the advantage that the mixing tube has its optimum length for the efficiency.
  • the adaptation of the suction jet pump to the available installation space thus takes place essentially via the deflection element.
  • a particularly small overall length of the suction jet pump is achieved with a deflecting element whose deflection is 180 °, so that the two ends of the deflecting element are aligned parallel to one another.
  • a suction jet pump requires a significantly shorter propellant line than a suction jet pump, in which the 180 ° deflection takes place upstream of the propellant nozzle.
  • a particularly low production cost has a suction jet pump, wherein the deflecting element is designed for connection to the mixing tube and the diffuser.
  • This embodiment allows the use of the same mixing tube and the same diffuser for different locations.
  • the adaptation of the suction jet pump to the respective installation conditions takes place in these cases exclusively on the design of the deflecting element.
  • the assembly of the suction jet pump is significantly simplified if the deflecting element is integrally formed with the mixing tube or the diffuser or with both parts.
  • all components are made of plastic by injection molding.
  • the diffuser has a rectilinear profile after the deflecting element.
  • the diffuser has a curved course after the deflecting element. This opens up the possibility of further adaptation of the suction jet pump to the available space.
  • a particularly small length and a small footprint are achieved according to a further advantageous embodiment with a suction jet pump, the diffuser enclosing the mixing tube coaxial.
  • the flow exits the mixing tube and is deflected by the diffuser by 180 °, in order then to flow through the diffuser and thus opposite in a deviating to the mixing tube.
  • the flow in the diffuser is not affected when the diffuser is mounted over its outer periphery and positioned to the mixing tube. Such attachment is given when the diffuser is attached to another component and not to other parts of the ejector.
  • Such a connection may be individual webs, which are integrally formed either on the diffuser or in the region of the propulsion jet nozzle and engage with the respective other part or are welded to it.
  • the diffuser can have an opening angle between 1 ° and 10 °.
  • FIG. 1 shows a suction jet pump and a filter 1 in a fuel tank of a motor vehicle.
  • the suction jet pump consists of a propellant conduit 2, via which fuel is supplied from a fuel pump, not shown, as a propellant of the suction jet pump.
  • the propellant line 2 is followed by a propellant nozzle 3.
  • the emerging from themaschinenddüse 3 fuel enters via the drogue 4 in the mixing tube 5 a. Due to the high velocity of the escaping fuel, a negative pressure is generated in a suction region 6, is sucked through the fuel via a suction port 7 from the fuel tank into the mixing tube 5. After passing through the mixing tube 5, the pumped fuel passes into the diffuser 8.
  • the diffuser 8 is curved and thus has a deviating from the straight course of the mixing tube 5 course. Due to the curvature of the diffuser 8, the suction jet pump can be positioned at the position shown in the fuel tank despite the arrangement of the filter 1.
  • FIG. 2 shows a suction jet pump with a deflecting element 9, which is arranged between the mixing tube 5 and the diffuser 8.
  • the deflecting element 9 deflects the conveyed fuel by 180 °, so that the diffuser 8 has a course parallel and opposite to the course of the mixing tube 5. Since the deflection takes place via the deflection element 9 and this is a separate component, the diffuser 8 can be formed in a straight line.
  • the assembly of mixing tube 5, deflecting element 9 and diffuser 8 by means of a plug connection or by gluing or welding.
  • FIG. 3 shows a suction jet pump with a deflecting 9. Unlike FIG. 2 has the deflecting element 9 only one Curvature of 45 °. Further, it is integrally connected to the diffuser 8, so that there is only one mounting point to the mixing tube 5.
  • the suction jet pump in FIG. 4 has a diffuser 8, which is arranged coaxially to the mixing tube 5 and encloses this.
  • the pumped fuel exits from the mixing tube 5 and is deflected by the diffuser by 180 °, in order then to flow through the diffuser 8 and thus opposite in a deviating to the mixing tube 5 course.
  • the attachment of the diffuser 8 via individual webs 10 which extend from the outer periphery of the diffuser 8 into the region of the propulsion jet nozzle 3.
  • a latching step 11 is integrally formed, which engages in a corresponding latching point 12 of another component 13.
  • the diffuser 8 is also held and positioned to the mixing tube 5. But it is also conceivable to attach the diffuser 8 only one of the two types of connection.

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)

Claims (4)

  1. Pompe à jet aspirante comprenant une conduite d'agent propulsif, une buse à jet propulsif, une région d'aspiration, un tube de mélange et un diffuseur, la buse à jet propulsif et le tube de mélange étant orientés en ligne droite l'un par rapport à l'autre, le diffuseur (8), vu dans la direction d'écoulement, présentant une allure s'écartant de l'allure du tube de mélange (5), le diffuseur (8) présentant une allure courbe, caractérisée en ce qu'entre le tube de mélange (5) et le diffuseur (8) est disposé un élément de déviation (9), l'élément de déviation (9) étant réalisé d'une seule pièce au moins avec le tube de mélange (5) ou avec le diffuseur (8).
  2. Pompe à jet aspirante selon la revendication 1, caractérisée en ce que l'élément de déviation (9) présente une déviation inférieure à 180°.
  3. Pompe à jet aspirante selon la revendication 1, caractérisée en ce que l'élément de déviation (9) présente une déviation de 180°.
  4. Pompe à jet aspirante comprenant une conduite d'agent propulsif, une buse à jet propulsif, une région d'aspiration, un tube de mélange et un diffuseur, la buse à jet propulsif et le tube de mélange étant orientés en ligne droite l'un par rapport à l'autre, le diffuseur (8), vu dans la direction d'écoulement, présentant une allure s'écartant de l'allure du tube de mélange (5), caractérisée en ce que le diffuseur (8) entoure le tube de mélange (5) coaxialement.
EP14708245.7A 2013-03-07 2014-03-05 Pompe à jet aspirante Active EP2964961B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013203942.5A DE102013203942B4 (de) 2013-03-07 2013-03-07 In einem Kraftstoffbehälter eines Kraftfahrzeugs angeordnete Saugstrahlpumpe
PCT/EP2014/054233 WO2014135574A1 (fr) 2013-03-07 2014-03-05 Pompe à jet aspirante

Publications (2)

Publication Number Publication Date
EP2964961A1 EP2964961A1 (fr) 2016-01-13
EP2964961B1 true EP2964961B1 (fr) 2017-05-10

Family

ID=50236168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14708245.7A Active EP2964961B1 (fr) 2013-03-07 2014-03-05 Pompe à jet aspirante

Country Status (5)

Country Link
US (1) US10072674B2 (fr)
EP (1) EP2964961B1 (fr)
CN (1) CN105190050B (fr)
DE (1) DE102013203942B4 (fr)
WO (1) WO2014135574A1 (fr)

Families Citing this family (11)

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DE102015200341A1 (de) 2015-01-13 2016-07-14 Polytec Plastics Germany Gmbh & Co. Kg Mehrstufige Saugstrahlpumpe
DE102016206616A1 (de) 2016-04-19 2017-10-19 Elringklinger Ag Ejektorvorrichtung und Kombination aus einer Zylinderkopfhaube und einer Ejektorvorrichtung
DE102016206615A1 (de) * 2016-04-19 2017-10-19 Elringklinger Ag Ejektorvorrichtung und Kombination aus einer Zylinderkopfhaube und einer Ejektorvorrichtung
DE102016207459A1 (de) * 2016-04-29 2017-11-02 Robert Bosch Gmbh Saugstrahlpumpe
FR3063304B1 (fr) * 2017-02-28 2019-03-22 Akwel Dispositif d’aspiration et de decantation d’un gaz de carter et installation associee
DE102018213313A1 (de) * 2018-08-08 2020-02-13 Robert Bosch Gmbh Förderaggregat für ein Brennstoffzellen-System zur Förderung und/oder Steuerung eines gasförmigen Mediums
DE102018213327A1 (de) * 2018-08-08 2020-02-13 Robert Bosch Gmbh Förderaggregat für ein Brennstoffzellen-System zur Fördern und/oder Rezirkulation eines gasförmigen Mediums
DE102018216299B3 (de) 2018-09-25 2020-02-13 Robert Bosch Gmbh Brennstoffzellen-System mit einem Förderaggregat und/oder ein Förderaggregat für ein Brennstoffzellen-System zur Förderung und/oder Steuerung eines gasför-migen Mediums
DE102019200613A1 (de) 2019-01-18 2020-07-23 Robert Bosch Gmbh Strahlpumpeneinheit zum Steuern eines gasförmigen Mediums
DE102019204723A1 (de) * 2019-04-03 2020-10-08 Robert Bosch Gmbh Förderaggregat für ein Brennstoffzellen-System zur Förderung und/oder Steuerung eines gasförmigen Mediums
DE102019214676A1 (de) * 2019-09-25 2021-03-25 Robert Bosch Gmbh Förderaggregat für ein Brennstoffzellen-System zur Förderung und/oder Steuerung eines gasförmigen Mediums

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Also Published As

Publication number Publication date
EP2964961A1 (fr) 2016-01-13
US10072674B2 (en) 2018-09-11
DE102013203942B4 (de) 2014-12-04
US20160017896A1 (en) 2016-01-21
WO2014135574A1 (fr) 2014-09-12
CN105190050A (zh) 2015-12-23
DE102013203942A1 (de) 2014-09-11
CN105190050B (zh) 2018-01-12

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