EP1457685A1 - Strahlpumpe - Google Patents

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Publication number
EP1457685A1
EP1457685A1 EP04290675A EP04290675A EP1457685A1 EP 1457685 A1 EP1457685 A1 EP 1457685A1 EP 04290675 A EP04290675 A EP 04290675A EP 04290675 A EP04290675 A EP 04290675A EP 1457685 A1 EP1457685 A1 EP 1457685A1
Authority
EP
European Patent Office
Prior art keywords
duct
inlet
pump
main
blind end
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Withdrawn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
EP04290675A
Other languages
English (en)
French (fr)
Inventor
Nathalie Proust
Yvon Paquis
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.)
Nobel Plastiques SA
Original Assignee
Nobel Plastiques SA
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 Nobel Plastiques SA filed Critical Nobel Plastiques SA
Publication of EP1457685A1 publication Critical patent/EP1457685A1/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to a pump suction, and more particularly a jet pump.
  • Such a suction pump is especially intended to be used in a return circuit, to a tank, excess fuel from an engine thermal, for example injection.
  • the return circuit has a main branch from the injection pump and a secondary branch from the injectors and the suction pump is mounted in such a way that the flow of the main branch is used as a jet through a nozzle of the suction pump to suck the fluid back from the injectors and lead it to the tank.
  • a suction pump of this type generally includes a body made up of several parts in each which is provided with at least one duct of such so that once assembled, the pump body suction line delimits a main inlet duct of the fluid coming from the injection pump, a conduit fluid inlet condaire from the injectors and a fluid outlet conduit towards the reservoir.
  • the three conduits are interconnected at a chamber in the pump body and in which the fluid from the secondary duct inlet mixes with fluid from the main duct input.
  • An object of the invention is to provide a means to simplify the manufacture of the pump and limit the risk of leakage and flow disturbances.
  • a suction pump comprising a body in which are provided at least one main inlet duct, one duct secondary inlet and outlet duct, the duct secondary entrance having a blind end in which arrives the main inlet duct and which leaves the outlet pipe, the secondary pipe inlet and outlet duct forming an angle between them obtuse and blind end of secondary duct inlet includes truncation on the side of the exit.
  • the blind end of the secondary inlet duct forms the interconnection chamber of the three conduits.
  • the inclination of the secondary inlet duct and the truncation allow the fluid to be guided towards the outlet and facilitate the passage of the fluid in the conduit Release. This limits the risk of occurrence disturbances such as cavitation and / or vortices that would impede flow in the pump.
  • This simplifies the structure of the suction pump by making the pump body by injection using a mold incorporating three cores competing to form the three conduits while having good flow in the connection area.
  • the suction pump comprises a body 1 in which a main inlet duct, a duct are provided secondary inlet and an outlet conduit carrying respectively general references 2, 3, and 4.
  • the main inlet duct 2 has a section inlet 2a, having one end opening out outside of body 1 and an opposite end connected via a converging section 2b to the end of a nozzle 2c having an opposite end opening out in a blind end 3a of the secondary duct input 3.
  • the secondary inlet conduit 3 has, at the opposite of the blind end 3a, one end opening out outside the body 1.
  • the outlet duct 4 is arranged so as to form a venturi.
  • the outlet duct 4 includes a neck cylindrical 4a having one end opening into the blind end 3a of the secondary inlet duct 3, and an opposite end connected to a divergent horn 3b opening to the outside of the body 1.
  • the divergent tube 3b has a half angle at the top which is understood here between 10 ° and 12 ° approximately.
  • the secondary inlet conduit 3 forms an angle ⁇ obtuse with the outlet pipe 4.
  • the angle ⁇ here is 97.5 °.
  • the main inlet duct 2 and the output 4 are coaxial. Secondary duct 3 forms then an acute angle ⁇ with the main inlet duct 2. In the present case, the angle ⁇ is approximately 82.5 °.
  • the neck 4a has a diameter d1 greater than the diameter d2 from nozzle 2c.
  • the d1 / d2 ratio here is around 1.2.
  • the cross section T of the blind end 3a of the secondary inlet duct 3 is greater than the cross section of the neck 4a and therefore also at the nozzle cross section 2c.
  • blind end 3a extends beyond the outlets, in the secondary inlet duct 3, the main inlet duct 2 and the exit 4.
  • the blind end 3a has a truncation 5 of the side of the neck 4a.
  • the truncation 5 forms a deflector so to promote the training of secondary fluid from secondary inlet duct 3 through the flow of the main fluid from direction A of the main duct input 2.
  • the truncation 5 extends in the portion of the blind end 3a which extends to opposite the open end of the secondary duct inlet 3 with respect to the axis of outlet duct 4 and forms a fluid guide ramp in the outlet 4.
  • the truncation 5 forms an acute ⁇ angle with the secondary inlet duct 3.
  • the angle ⁇ here is 20 ° about.
  • the upper downstream portion (by reference to the meaning flow A) connecting the secondary duct inlet 3 with outlet duct 4, on the one hand, and the truncation 5, on the other hand, constitute portions of surface which guide the fluid towards the outlet duct 4 and facilitate the passage of the fluid in the conduit of exit 4. This limits the risk of the appearance of cavitation and / or vortex phenomena that could disturb the flow in the pump.
  • the body 1 can be easily manufactured by injection in a mold provided with three concurrent cores, the first for sections 2a, 2b and 2c of the main duct inlet 2, the second for the secondary duct input 3 and the third for sections 4a and 4b of outlet duct 4.
  • the free end of the core forming the secondary inlet conduit 3 receives face to face the free ends of the other two nuclei.
  • the body 1 can be produced by milling.
  • the angle between the main and secondary input can be changed, as can the ratio d1 / d2, for example as a function of the relative bit rates.
  • the body may have a different structure and for example include an additional inlet duct opening into the inlet section 2a of the main duct input 2.

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)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP04290675A 2003-03-11 2004-03-11 Strahlpumpe Withdrawn EP1457685A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0302980A FR2852363A1 (fr) 2003-03-11 2003-03-11 Pompe d'aspiration monobloc
FR0302980 2003-03-11

Publications (1)

Publication Number Publication Date
EP1457685A1 true EP1457685A1 (de) 2004-09-15

Family

ID=32749775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04290675A Withdrawn EP1457685A1 (de) 2003-03-11 2004-03-11 Strahlpumpe

Country Status (2)

Country Link
EP (1) EP1457685A1 (de)
FR (1) FR2852363A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7901191B1 (en) 2005-04-07 2011-03-08 Parker Hannifan Corporation Enclosure with fluid inducement chamber

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1630543A (en) * 1925-07-27 1927-05-31 William H Scott Receptacle filling and draining device
US4562612A (en) * 1983-08-29 1986-01-07 Williams Raymond F Fluid-driven transducer vacuum tool
WO1989007204A1 (en) * 1988-02-04 1989-08-10 Dems Engineering I/S Switchable ejector
EP1160522A1 (de) * 2000-06-01 2001-12-05 Denso Corporation Ejektorzyklus
DE20120138U1 (de) * 2001-12-12 2002-02-28 Festo AG & Co, 73734 Esslingen Vakuumerzeugervorrichtung
US20030034078A1 (en) * 2001-08-16 2003-02-20 Richard Haas Back flow preventing eductor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1630543A (en) * 1925-07-27 1927-05-31 William H Scott Receptacle filling and draining device
US4562612A (en) * 1983-08-29 1986-01-07 Williams Raymond F Fluid-driven transducer vacuum tool
WO1989007204A1 (en) * 1988-02-04 1989-08-10 Dems Engineering I/S Switchable ejector
EP1160522A1 (de) * 2000-06-01 2001-12-05 Denso Corporation Ejektorzyklus
US20030034078A1 (en) * 2001-08-16 2003-02-20 Richard Haas Back flow preventing eductor
DE20120138U1 (de) * 2001-12-12 2002-02-28 Festo AG & Co, 73734 Esslingen Vakuumerzeugervorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7901191B1 (en) 2005-04-07 2011-03-08 Parker Hannifan Corporation Enclosure with fluid inducement chamber

Also Published As

Publication number Publication date
FR2852363A1 (fr) 2004-09-17

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