EP0148691A2 - Membranpumpe mit regelbarem Förderstrom - Google Patents

Membranpumpe mit regelbarem Förderstrom Download PDF

Info

Publication number
EP0148691A2
EP0148691A2 EP84402657A EP84402657A EP0148691A2 EP 0148691 A2 EP0148691 A2 EP 0148691A2 EP 84402657 A EP84402657 A EP 84402657A EP 84402657 A EP84402657 A EP 84402657A EP 0148691 A2 EP0148691 A2 EP 0148691A2
Authority
EP
European Patent Office
Prior art keywords
piston
axis
eccentric
stroke
fixed shaft
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
EP84402657A
Other languages
English (en)
French (fr)
Other versions
EP0148691A3 (en
EP0148691B1 (de
Inventor
Max-Albert Malizard
Jean-Claude Degremont
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.)
Dosapro Milton Roy SA
Original Assignee
Dosapro Milton Roy 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 Dosapro Milton Roy SA filed Critical Dosapro Milton Roy SA
Priority to AT84402657T priority Critical patent/ATE27849T1/de
Publication of EP0148691A2 publication Critical patent/EP0148691A2/de
Publication of EP0148691A3 publication Critical patent/EP0148691A3/fr
Application granted granted Critical
Publication of EP0148691B1 publication Critical patent/EP0148691B1/de
Expired 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston

Definitions

  • the invention relates to an improvement to variable-flow diaphragm pumps, more particularly to means for driving and guiding the piston with a fixed stroke for hydraulic actuation of the diaphragm.
  • various systems of diaphragm pumps with variable flow rate are known, in which the membrane limiting the pumping chamber is hydraulically actuated by a liquid contained in a second chamber called the displacement chamber in which a piston moving with movement moves. fixed stroke alternative.
  • the variation in flow is then obtained by a device making it possible to discharge part of the liquid contained in the displacement chamber during a variable part of the stroke.
  • this device can be constituted by a hollow piston provided in the vicinity of the rear bottom with radial orifices obscured by an outer ring during part of the stroke and opening into a reserve chamber at atmospheric pressure during another part of this stroke.
  • An adjustment of the axial position of the outer ring makes it possible to vary the portion of the stroke called "active stroke" during which the orifices are concealed and thereby the flow rate of the pump.
  • this pump system Compared to hydraulically operated diaphragm pumps with variable stroke or rate of the piston, this pump system has a notable simplification of construction and cost price. However, it has a main drawback.
  • the invention relates to an improvement to diaphragm pumps with variable flow rate, the diaphragm limiting a pumping chamber being actuated hydraulically by a liquid contained in a displacement chamber in which a piston moving with a reciprocating movement moves. fixed, said piston being hollow and having, in the vicinity of the rear bottom, radial orifices obscured by an outer ring during part of the stroke and opening into a reserve chamber at atmospheric pressure during another part of the stroke, said piston being driven in an alternating movement by a circular eccentric cooperating with two opposite surfaces integral with the piston and perpendicular to its axis.
  • said eccentric is integral with the wheel of a wheel and screw reducing couple, the eccentric wheel assembly being mounted so as to turn idly on a fixed shaft whose axis is perpendicular to the axis of the piston and passes through this axis, said piston ending in a U-shaped tail whose wings perpendicular to the axis of the piston and spaced a length slightly greater than the diameter of said eccentric carry said opposite surfaces, and the base of which is perpendicular to said fixed shaft and is provided with a longitudinal groove parallel to the axis of the piston which is crossed by said fixed shaft, the width of said groove being very slightly greater than the diameter of the fixed shaft.
  • FIG. 1 From left to right from the front face, there are successively: The pumping chamber 1 provided with the suction valve 2 and the discharge valve 3, the membrane 4, the displacement chamber 5 housing the hollow piston 6, and the piston drive system 7.
  • the membrane 4 shown is a composite membrane formed from a central core of flexible elastomer plated with two thin layers of teflon 4a and 4b. It is provided with a rupture detector not described in detail, indicated diagrammatically at 8.
  • the membrane 4 is circular and it is held at its periphery by pinching between two rigid stops 9 and 10 disposed respectively in the chambers 1 and 5.
  • Each stop 9,10 is in the form of a ring coaxial with the membrane 4, and whose face 11,12 facing the membrane 4 has a generally conical profile flaring towards the membrane 4.
  • the face 11 of the stop 9 has a conical profile portion 13 extending radially inwards from the nip zone of the membrane 4, which continues with a bowl profile portion 14 up to the central orifice 15 of the stop 9 in the shape of a ring.
  • the orifice 15 preferably has a diameter of between a third and a half of the outside diameter of the stop 9.
  • the face 12 of the stop 10 only has a symmetrical profile of the profile of the aforementioned portion 13, with respect to the plane of pinching of the membrane.
  • the face 12 extends radially as far as the central orifice 16 of the stop 10, this orifice therefore having a diameter greater than the orifice 15.
  • the orifice 16 is crossed honrizontal by a beam 23 resting on the walls of the orifice and the face 24 of which faces the membrane 4 is slightly set back relative to the corresponding inlet of the orifice 16.
  • the beam 23 is provided with an axial through hole 25.
  • each deflector 17,18 has a flat face 19,20 in contact with the membrane 4.
  • the deflector 17 of the pumping chamber 1 has a conical profile 21 complementary to the bowl profile 14 of the stop 9.
  • the deflector 17 ends at center by a cylindrical nose 22 slightly engaging in the orifice 15.
  • the deflector 18 of the displacement chamber consists of a simple flat washer of diameter slightly smaller than that of the orifice 16 of the stop 10 and equal to outer diameter of the deflector 17.
  • the thickness of the deflector 18 corresponds to the axial offset between the face 24 of the beam 23 looking at the membrane 4 and the corresponding inlet of the orifice 16 of the stop 10.
  • the deflectors 17 and 18 are assembled on the membrane 4 by means of a screw 26 which rests on the deflector 18, passes through the latter, the membrane 4 and is fixed in the deflector 17.
  • the size of the hole 25 of the beam 23 is sufficient to accommodate the head of the screw 26.
  • the displacement chamber 5 is provided as is conventional, with a safety valve 27 and its evacuation takes place through the passage 28 in the reserve chamber 29 which is in principle at atmospheric pressure.
  • the hollow piston 6 is provided at its rear part with a plurality of holes 30 which can be closed or open out in the chamber 29 depending on the relative position of the piston and of the adjustment sleeve 31 mounted floating on the piston with very little play. longitudinal position of this sleeve 31 can be adjusted by means of a rack 32 driven by the pinion 33, itself controlled by the graduated adjustment button 34.
  • the adjustment system is set so that in the extreme front position shown from the sleeve 31, the holes 30 are uncovered during the entire stroke of the piston shown here in the extreme forward position. This corresponds to the zero flow of the pump.
  • a reducing gear wheel 35 and screw 36 is fixed in the casing 37 of the reserve chamber 29.
  • the screw 36 has an axial recess opening 38 at its upper end intended to cooperate with the shaft of a drive motor fixed on the casing 37.
  • the screw 36 rests at its lower end on a thrust bearing 39.
  • the wheel 35 is in one piece with a circular eccentric 40. This assembly is mounted so as to turn idly on a fixed shaft 41 whose axis is perpendicular to the axis of the piston 6 and passes through this axis.
  • the piston 6 has at its rear end a U-shaped tail 42 whose wings 43,44 are permendicular to the axis of the piston 6 and spaced a length very slightly greater than the diameter of the eccentric 40, that -ci being equipped with a rotating ring 45 mounted on its running surface.
  • the base 46 of the U-shaped tail 42 is perpendicular to the fixed shaft 41 and it is provided with a longitudinal groove 47 parallel to the axis of the piston 6, which is crossed by the fixed shaft 41, the width of the groove 47 being very slightly greater than the diameter of the fixed shaft 41, and its length being sufficient not to hinder the movement of the piston.
  • the operation of the pump as a whole is conventional.
  • the movement of the piston results in a displacement of the membrane producing in the pumping chamber a sweep equivalent to the useful displacement, that is to say that swept by the piston during the part of the stroke where the holes 30 are closed.
  • the displacement chamber 5 is in communication with the reserve chamber 29.
  • the membrane 4 is at the end of the rear stroke and it is applied against the stop 10 and, by means of the deflector 18, against the beam 23.
  • the face 12 of the stop 10 and the face 20 of the deflector 18 constitute a substantially continuous bearing surface for said membrane.
  • the other stop 9 defines, in cooperation with the other deflector 17, a large annular passage promoting the flow of the fluid.
  • the invention finds its application in the manufacture of diaphragm pumps with adjustable flow rate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
EP84402657A 1984-01-11 1984-12-19 Membranpumpe mit regelbarem Förderstrom Expired EP0148691B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402657T ATE27849T1 (de) 1984-01-11 1984-12-19 Membranpumpe mit regelbarem foerderstrom.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8400343 1984-01-11
FR8400343A FR2557928B1 (fr) 1984-01-11 1984-01-11 Perfectionnement aux pompes a membrane a debit variable.

Publications (3)

Publication Number Publication Date
EP0148691A2 true EP0148691A2 (de) 1985-07-17
EP0148691A3 EP0148691A3 (en) 1985-09-11
EP0148691B1 EP0148691B1 (de) 1987-06-16

Family

ID=9300002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402657A Expired EP0148691B1 (de) 1984-01-11 1984-12-19 Membranpumpe mit regelbarem Förderstrom

Country Status (6)

Country Link
US (1) US4883412A (de)
EP (1) EP0148691B1 (de)
AT (1) ATE27849T1 (de)
CA (1) CA1248411A (de)
DE (1) DE3464276D1 (de)
FR (1) FR2557928B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375848A1 (de) * 1988-12-30 1990-07-04 Alltech Dosieranlagen Gmbh Dosierpumpe
US5059099A (en) * 1989-07-28 1991-10-22 Wagner Spray Tech Corporation Integral pump housing
GB2282419A (en) * 1993-10-02 1995-04-05 Munster Simms Engineering Limi Diaphragm pump
WO1997013069A1 (en) * 1995-10-04 1997-04-10 Wanner Engineering, Inc. Diaphragm pump
FR2741945A1 (fr) * 1995-12-01 1997-06-06 Pulsafeeder Inc Pompe de mesure a diaphragme ayant une construction modulaire
WO2017016642A1 (de) * 2015-07-30 2017-02-02 Linde Aktiengesellschaft Vorrichtung zur druckerhöhung eines fluids mit einem druckbegrenzungsventil
WO2017016635A1 (de) * 2015-07-30 2017-02-02 Linde Aktiengesellschaft Vorrichtung zur druckerhöhung eines fluids, insbesondere in form eines druckgasflaschenventils
WO2021029877A1 (en) * 2019-08-13 2021-02-18 Hewlett-Packard Development Company, L.P. Fluid ejection apparatus for discreet packet transfer of fluid

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3829566A1 (de) * 1988-08-31 1990-03-08 Fritz Mueller Kolbenantrieb
US5106274A (en) * 1990-07-23 1992-04-21 Mark Holtzapple Hermetic compressor
FR2670537B1 (fr) * 1990-12-18 1994-10-28 Milton Roy Dosapro Pompe a membrane a commande hydraulique pour pressions elevees.
DE4141670C2 (de) * 1991-12-17 1994-09-29 Ott Kg Lewa Hydraulisch angetriebene Membranpumpe mit Membranhubbegrenzung
DE4327969C2 (de) * 1993-08-19 1997-07-03 Ott Kg Lewa Hydraulisch angetriebene Membranpumpe
DE4327970C2 (de) * 1993-08-19 1997-07-03 Ott Kg Lewa Hydraulisch angetriebene Membranpumpe mit mechanischer Membranhubbegrenzung
US6099269A (en) * 1997-10-06 2000-08-08 Fin Robur Absorption refrigeration system having a diaphragm pump and a hydraulic piston pump
US6283727B1 (en) * 2000-04-18 2001-09-04 Milton Bay Metering pump
DE20307457U1 (de) * 2003-05-13 2003-07-31 GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG, 74653 Ingelfingen Druckstück für ein Membranventil
US7425120B2 (en) * 2005-04-26 2008-09-16 Wanner Engineering, Inc. Diaphragm position control for hydraulically driven pumps
FR2895036B1 (fr) 2005-12-20 2008-02-22 Milton Roy Europ Sa Pompe a membrane a actionnement hydraulique avec dispositif de compensation des fuites
CN101245777B (zh) * 2007-02-13 2010-09-08 米尔顿罗伊欧洲公司 具有泄漏补偿设备的液压致动隔膜泵
US7665974B2 (en) * 2007-05-02 2010-02-23 Wanner Engineering, Inc. Diaphragm pump position control with offset valve axis
EP3597305B1 (de) 2008-10-22 2022-08-24 Graco Minnesota Inc. Tragbare airless-spritzvorrichtung
FR2966525B1 (fr) * 2010-10-22 2012-11-16 Milton Roy Europe Pompe a membrane a forte capacite d'aspiration
EP2457644B1 (de) 2010-11-25 2015-09-09 Milton Roy Mixing Verfahren zur automatischen Eliminierung von Fasern auf dem Laufrad eines Mixers in einem Abwasserbehandlungsverfahren
US20150204320A1 (en) * 2012-09-04 2015-07-23 Hove A/S Diaphragm pump
WO2015119717A1 (en) 2014-02-07 2015-08-13 Graco Minnesota Inc. Pulseless positive displacement pump and method of pulselessly displacing fluid
WO2016077751A1 (en) * 2014-11-14 2016-05-19 Checkpoint Fluidic Systems International, Ltd. Metallic sandwich diaphragm pump mechanism
ITUB20151971A1 (it) * 2015-07-06 2017-01-06 Seko Spa Pompa a membrana
US11007545B2 (en) 2017-01-15 2021-05-18 Graco Minnesota Inc. Handheld airless paint sprayer repair
US11022106B2 (en) 2018-01-09 2021-06-01 Graco Minnesota Inc. High-pressure positive displacement plunger pump
WO2019199760A1 (en) 2018-04-10 2019-10-17 Graco Minnesota Inc. Handheld airless sprayer for paints and other coatings
CN109458316A (zh) * 2018-09-29 2019-03-12 陕西科技大学 一种硫酸进料泵
CN208934890U (zh) * 2018-10-27 2019-06-04 东莞市茗创优尚电子科技有限公司 一种弹性膜片式泵体
CN117046639A (zh) 2019-05-31 2023-11-14 固瑞克明尼苏达有限公司 手持式流体喷雾器
KR20220156622A (ko) 2020-03-31 2022-11-25 그라코 미네소타 인크. 전기 작동식 변위 펌프
US10968903B1 (en) 2020-06-04 2021-04-06 Graco Minnesota Inc. Handheld sanitary fluid sprayer having resilient polymer pump cylinder
US10926275B1 (en) 2020-06-25 2021-02-23 Graco Minnesota Inc. Electrostatic handheld sprayer
US20230160378A1 (en) 2022-10-15 2023-05-25 Ningbo Seago Electric Co., Ltd. Water flosser pump body structure and water flosser

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR732745A (fr) * 1932-03-07 1932-09-24 Perfectionnements aux moteurs thermiques
US3612727A (en) * 1969-10-17 1971-10-12 Crane Co Metering pump
FR2161608A5 (de) * 1971-11-16 1973-07-06 Ransburg Corp
AT314851B (de) * 1969-10-06 1974-04-25 Vni K I T I Gidromashinostroen Einrichtung zur Einstellung der Fördermenge von Dosierpumpen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1050528A (en) * 1912-07-24 1913-01-14 Albert G Elvin Fluid-pressure motor.
US2450912A (en) * 1944-05-05 1948-10-12 Putnam James Boyd Internal-combustion motor with pistons symmetrically arranged about cams on the drive shaft
US3216355A (en) * 1963-02-25 1965-11-09 Seeger Wanner Corp Two-cylinder pump
US3312171A (en) * 1965-10-12 1967-04-04 New York Air Brake Co Pumps
US3910727A (en) * 1972-09-13 1975-10-07 Valve Syst Int Inc Metering pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR732745A (fr) * 1932-03-07 1932-09-24 Perfectionnements aux moteurs thermiques
AT314851B (de) * 1969-10-06 1974-04-25 Vni K I T I Gidromashinostroen Einrichtung zur Einstellung der Fördermenge von Dosierpumpen
US3612727A (en) * 1969-10-17 1971-10-12 Crane Co Metering pump
FR2161608A5 (de) * 1971-11-16 1973-07-06 Ransburg Corp

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375848A1 (de) * 1988-12-30 1990-07-04 Alltech Dosieranlagen Gmbh Dosierpumpe
US5059099A (en) * 1989-07-28 1991-10-22 Wagner Spray Tech Corporation Integral pump housing
GB2282419A (en) * 1993-10-02 1995-04-05 Munster Simms Engineering Limi Diaphragm pump
GB2282419B (en) * 1993-10-02 1997-07-09 Munster Simms Engineering Limi Diaphragm pump
WO1997013069A1 (en) * 1995-10-04 1997-04-10 Wanner Engineering, Inc. Diaphragm pump
US5707219A (en) * 1995-10-04 1998-01-13 Wanner Engineering Diaphragm pump
FR2741945A1 (fr) * 1995-12-01 1997-06-06 Pulsafeeder Inc Pompe de mesure a diaphragme ayant une construction modulaire
WO2017016642A1 (de) * 2015-07-30 2017-02-02 Linde Aktiengesellschaft Vorrichtung zur druckerhöhung eines fluids mit einem druckbegrenzungsventil
WO2017016635A1 (de) * 2015-07-30 2017-02-02 Linde Aktiengesellschaft Vorrichtung zur druckerhöhung eines fluids, insbesondere in form eines druckgasflaschenventils
WO2021029877A1 (en) * 2019-08-13 2021-02-18 Hewlett-Packard Development Company, L.P. Fluid ejection apparatus for discreet packet transfer of fluid

Also Published As

Publication number Publication date
FR2557928B1 (fr) 1988-04-22
FR2557928A1 (fr) 1985-07-12
EP0148691A3 (en) 1985-09-11
US4883412A (en) 1989-11-28
EP0148691B1 (de) 1987-06-16
DE3464276D1 (en) 1987-07-23
ATE27849T1 (de) 1987-07-15
CA1248411A (en) 1989-01-10

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