EP0961022A2 - Pompe à venturi - Google Patents

Pompe à venturi Download PDF

Info

Publication number
EP0961022A2
EP0961022A2 EP99303660A EP99303660A EP0961022A2 EP 0961022 A2 EP0961022 A2 EP 0961022A2 EP 99303660 A EP99303660 A EP 99303660A EP 99303660 A EP99303660 A EP 99303660A EP 0961022 A2 EP0961022 A2 EP 0961022A2
Authority
EP
European Patent Office
Prior art keywords
throat
throat region
pump
region
feed port
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Withdrawn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
EP99303660A
Other languages
German (de)
English (en)
Other versions
EP0961022A3 (fr
Inventor
Michael Peter Cooke
Christopher Matthew Moore
Paul Raymond Smith
Christopher Stringfellow
Paul Francis Garland
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.)
Delphi Technologies Inc
Original Assignee
Lucas Industries Ltd
Delphi Technologies Inc
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
Priority claimed from US09/110,742 external-priority patent/US5983869A/en
Application filed by Lucas Industries Ltd, Delphi Technologies Inc filed Critical Lucas Industries Ltd
Publication of EP0961022A2 publication Critical patent/EP0961022A2/fr
Publication of EP0961022A3 publication Critical patent/EP0961022A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F04F5/466—Arrangements of nozzles with a plurality of nozzles arranged in parallel
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/38—Pumps characterised by adaptations to special uses or conditions

Definitions

  • This invention relates to a venturi pump for use in drawing fluid along a passage or pipe.
  • Figure 1 illustrates a typical venturi pump arrangement which comprises a housing 10 defining a fluid flow passage 12.
  • a throat member 14 is located within the passage 12, the throat member 14 including an axially extending through passage 16.
  • the throat member 14 is shaped such that the passage 16 includes a first tapering region 16 a in which the diameter of the passage 16 tapers from a maximum at the upstream end of the throat member 14 to a minimum adjacent a throat region 16 b of the passage which is of uniform diameter.
  • the diameter of the passage 16 gradually increases in a second tapering region 16 c located downstream of the throat region 16 b .
  • a plurality of ports 18 communicate with the throat region 16 b , the ports 18 communicating with an opening 20 which, in use, is connected to a passage or pipe through which fluid is to be drawn.
  • fluid from an appropriate source flows along the passage 12.
  • the presence of the throat member 14 reduces the area through which fluid can flow with the result that the velocity of fluid within the throat region 16 b is greater than that within the part of the passage 12 upstream of the throat member 14.
  • the increased velocity of fluid has the effect of reducing the static fluid pressure thus applying a vacuum to the ports 18 drawing fluid from the pipe or passage through the opening 20 and ports 18 to join the flow of fluid along the passage 12.
  • a venturi pump comprising a throat member defining a flow passage including a throat region, and at least one feed port communicating with the throat region, wherein the part of the throat region immediately downstream of the feed port is of greater cross-sectional area than the part of the throat region immediately upstream of the feed port.
  • the flow of fluid through the feed port does not result in a significant increase in the static pressure of fluid flowing past the end of the feed port, thus a relatively large magnitude vacuum can still be drawn.
  • the throat member conveniently takes the form of an insert intended to be received within a flow passage provided in a housing.
  • the first and second parts of the throat region together define a step in the throat region, the or each feed port communicating with the throat region immediately downstream of the step or at positions which straddle the step.
  • venturi pump illustrated in Figure 2 is similar to that illustrated in Figure 1, and like reference numerals will be used to denote like parts.
  • the first tapering region 16 a is constituted by an upstream frusto-conical region, a region of substantially uniform diameter, and a downstream frusto-conical region which is adjacent the upstream edge of the throat region 16 b .
  • the throat region 16 b is constituted by a first, upstream end 22 of relatively small diameter, and a second, downstream end 24 which is of diameter greater than the diameter of the upstream end 22.
  • the first and second ends 22, 24 of the throat region 16 b together define a step.
  • the ports 18 communicate with the through passage 16 defined by the throat member 14 at positions which straddle the step, thus part of each port 18 opens into the first, upstream end 22 of the throat region 16 b , each port 18 further including a part which opens into the second, downstream end 24 of the throat region 16 b .
  • the ports 18 may communicate with the through passage 16 defined by the throat member 14 immediately downstream of the step.
  • the downstream end 24 of the throat region 16 b opens into the second tapering region 16 c of the through passage 16 defined by the throat member 14.
  • the opening 20 is connected to a pipe through which fluid is to be drawn.
  • the flow passage 12 is connected to a source of fluid such that fluid flows along the flow passage 12 and through the passage 16 defined by the throat member 14. It will be appreciated that the flow of fluid along the flow passage 12 is at relatively low velocity upstream of the throat member 14, the velocity of the fluid increasing as it flows through the first tapering region 16 a of the throat member 14. The velocity of the fluid flowing through the first, upstream end 22 of the throat region 16 b is significantly greater than that within the flow passage 12 upstream of the throat member 14, and as a result, the static fluid pressure at the ends of the ports 18 is relatively low.
  • the second, downstream end 24 of the throat region 16 b is of sufficiently large diameter relative to that of the first, upstream end 22 of the throat region 16 b that the increase in quantity of fluid flowing through this part of the throat region 16 b relative to the first, upstream end 22 thereof does not significantly increase the velocity of the fluid flowing through the throat region 16 b .
  • a significant reduction in static fluid pressure can still be achieved at the opening 20, and hence a relatively large magnitude vacuum can be drawn in the pipe or passage connected to the opening 20, even when fluid flows through the ports 18 at a significant rate.
  • Figures 3 and 4 illustrate an arrangement containing two ports 18, each port 18 being defined by a recess formed in the outer periphery of the throat member, the recesses being shaped such that the parts thereof defining the ports 18 open into the throat region 16 b of the throat member 14 around the complete circumference of the part of the throat region 16 b at the intersection of the first end 22 and the second end 24 thereof.
  • the throat member 14 illustrated in Figures 3 and 4 is designed to permit manufacture by injection moulding, and can be moulded as a single component using a reasonably small number of slides in the mould.
  • the injection moulding process may be simplified further by manufacturing the throat member 14 in two separate pieces for example as illustrated in Figures 5 and 6 or in Figures 7 and 8.
  • the throat member 14 is defined by a first, upstream component 14 a which defines the first tapering region 16 a and first, upstream end 22 of the throat region 16 b , and a second, downstream component 14 b which defines the second end 24 of the throat region 16 b and the second tapering region 16 c .
  • the second component 14 b of the throat member 14 includes three projections 14 c which together serve to locate a frusto-conical end surface of the first component 14 a such that the combination of the first and second components 14 a , 14 b and the projections 14 c together define the ports 18 through which fluid is able to flow.
  • the ports 18 are located at the connection of the first and second components 14 a , 14 b , it will be appreciated that the ports 18 are aligned with the intersection between the first and second ends 22, 24 of the throat region 16 b .
  • first and second components 14 a , 14 b of the throat member 14 are conveniently secured to one another by axial clamping, or by friction welding, achieved by rotating the first and second components 14 a , 14 b relative to one another, or by using an appropriate adhesive.
  • Figures 7 and 8 illustrate an alternative arrangement in which the projections 14 c are omitted, and instead projections 14 d are provided on the first component 14 a of the throat member 14.
  • the projections 14 d are arranged to be received within corresponding recesses or bores 14 e formed in the second component 14 b of the throat member 14.
  • the projections 14 d serve to correctly locate the first and second components 14 a , 14 b of the throat member 14 with respect to one another, and to secure the components 14 a , 14 b to one another.
  • the components 14 a , 14 b may simply be secured together by being a press fit, or alternatively may be welded by ultrasonic welding in which the first and second components 14 a , 14 b are vibrated axially with respect to one another.
  • venturi pumps described hereinbefore may be used in a variety of applications.
  • the venturi pumps may be used to draw fuel from a back leak line of a fuel supply system for a series of fuel injectors used in supplying fuel to a compression ignition internal combustion engine.
  • the venturi pump may be driven by an appropriate flow of fuel through the fuel system, for example fuel flowing from the outlet of a transfer pump back towards a fuel reservoir, to the inlet of the transfer pump or to the cam box of a high pressure fuel pump.
  • the fuel used to drive the venturi pump may be derived from the output of the lift pump. It will be appreciated that the venturi pump is also suitable for use in other applications.
  • the pump may be used for emptying water from ditches using mains water pressure to drive the pump, the mains water flowing along the flow passage 12 and the water removed from the ditch flowing through a pipe or passage to the ports 18 and joining the flow of water along the flow passage 12 and continuing therewith.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP99303660A 1998-05-23 1999-05-11 Pompe à venturi Withdrawn EP0961022A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9811063.8A GB9811063D0 (en) 1998-05-23 1998-05-23 Venturi pump
GB9811063 1998-05-23
US09/110,742 US5983869A (en) 1997-07-26 1998-07-02 Fuel system

Publications (2)

Publication Number Publication Date
EP0961022A2 true EP0961022A2 (fr) 1999-12-01
EP0961022A3 EP0961022A3 (fr) 2000-11-22

Family

ID=26313728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99303660A Withdrawn EP0961022A3 (fr) 1998-05-23 1999-05-11 Pompe à venturi

Country Status (3)

Country Link
EP (1) EP0961022A3 (fr)
JP (1) JPH11351200A (fr)
GB (1) GB9811063D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1283355A1 (fr) * 2001-08-07 2003-02-12 Delphi Technologies, Inc. Injecteur de carburant
US10641406B2 (en) * 2016-11-30 2020-05-05 Universal Flow Monitors, Inc. Venturi vacuum drawback assemblies and dual orifice venturi valve assemblies
CN111997804A (zh) * 2020-08-21 2020-11-27 东风汽车股份有限公司 一种文丘里管安装结构
US11035483B2 (en) 2018-02-07 2021-06-15 Universal Flow Monitors, Inc. Dual orifice venturi vacuum drawback assemblies having air breather check valve
US11209024B2 (en) 2015-06-24 2021-12-28 Itt Manufacturing Enterprises Llc Discharge casing insert for pump performance characteristics control
US11555638B2 (en) * 2016-11-30 2023-01-17 Dwyer Instruments, Llc Venturi vacuum drawback assemblies and dual orifice venturi valve assemblies

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100650547B1 (ko) 2005-11-03 2006-11-27 재단법인서울대학교산학협력재단 벤츄리 타입 마이크로 펌프 및 이를 이용한 연료전지시스템

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE31463C (de) * ST. MAC.FARLANE in ' Drifton, State of Pennsylvania, V. St. A Injektor
CH310027A (de) * 1951-10-11 1955-09-30 Maschf Augsburg Nuernberg Ag Strahlpumpe.
US3720482A (en) * 1970-05-14 1973-03-13 Piab Ab Device for generating an air system by means of an ejector
DE4333612C1 (de) * 1993-10-01 1995-02-02 Keld Gabelgaard Absaugverfahren und Vorrichtungen hierfür

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE31463C (de) * ST. MAC.FARLANE in ' Drifton, State of Pennsylvania, V. St. A Injektor
CH310027A (de) * 1951-10-11 1955-09-30 Maschf Augsburg Nuernberg Ag Strahlpumpe.
US3720482A (en) * 1970-05-14 1973-03-13 Piab Ab Device for generating an air system by means of an ejector
DE4333612C1 (de) * 1993-10-01 1995-02-02 Keld Gabelgaard Absaugverfahren und Vorrichtungen hierfür

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
T. RAKOCZY: V.D.I ZEITSCHRIFT, vol. VDI-Z, no. 113, 1 September 1971 (1971-09-01), pages 1007-1010, XP002148037 Köln *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1283355A1 (fr) * 2001-08-07 2003-02-12 Delphi Technologies, Inc. Injecteur de carburant
US11209024B2 (en) 2015-06-24 2021-12-28 Itt Manufacturing Enterprises Llc Discharge casing insert for pump performance characteristics control
US10641406B2 (en) * 2016-11-30 2020-05-05 Universal Flow Monitors, Inc. Venturi vacuum drawback assemblies and dual orifice venturi valve assemblies
US11175086B2 (en) 2016-11-30 2021-11-16 Universal Flow Monitors, Inc. Venturi vacuum drawback assemblies and dual orifice venturi valve assemblies
US11555638B2 (en) * 2016-11-30 2023-01-17 Dwyer Instruments, Llc Venturi vacuum drawback assemblies and dual orifice venturi valve assemblies
US11035483B2 (en) 2018-02-07 2021-06-15 Universal Flow Monitors, Inc. Dual orifice venturi vacuum drawback assemblies having air breather check valve
CN111997804A (zh) * 2020-08-21 2020-11-27 东风汽车股份有限公司 一种文丘里管安装结构
CN111997804B (zh) * 2020-08-21 2021-04-23 东风汽车股份有限公司 一种文丘里管安装结构

Also Published As

Publication number Publication date
EP0961022A3 (fr) 2000-11-22
GB9811063D0 (en) 1998-07-22
JPH11351200A (ja) 1999-12-21

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