EP0148691A2 - Membranpumpe mit regelbarem Förderstrom - Google Patents
Membranpumpe mit regelbarem Förderstrom Download PDFInfo
- 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
Links
Images
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)
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 |
---|---|---|---|
FR8400343A FR2557928B1 (fr) | 1984-01-11 | 1984-01-11 | Perfectionnement aux pompes a membrane a debit variable. |
FR8400343 | 1984-01-11 |
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)
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 |
WO2017016635A1 (de) * | 2015-07-30 | 2017-02-02 | Linde Aktiengesellschaft | Vorrichtung zur druckerhöhung eines fluids, insbesondere in form eines druckgasflaschenventils |
WO2017016642A1 (de) * | 2015-07-30 | 2017-02-02 | Linde Aktiengesellschaft | Vorrichtung zur druckerhöhung eines fluids mit einem druckbegrenzungsventil |
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)
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 |
KR101708104B1 (ko) | 2008-10-22 | 2017-02-17 | 그라코 미네소타 인크. | 휴대용 에어리스 스프레이어 |
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 |
CN105992873B (zh) | 2014-02-07 | 2018-01-19 | 固瑞克明尼苏达有限公司 | 用于无脉动正位移泵的驱动系统 |
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 |
US11986850B2 (en) | 2018-04-10 | 2024-05-21 | 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 |
TW202110541A (zh) | 2019-05-31 | 2021-03-16 | 美商葛萊兒明尼蘇達股份有限公司 | 手持式流體噴霧器 |
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)
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)
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 |
-
1984
- 1984-01-11 FR FR8400343A patent/FR2557928B1/fr not_active Expired
- 1984-12-19 EP EP84402657A patent/EP0148691B1/de not_active Expired
- 1984-12-19 DE DE8484402657T patent/DE3464276D1/de not_active Expired
- 1984-12-19 AT AT84402657T patent/ATE27849T1/de not_active IP Right Cessation
-
1985
- 1985-01-10 CA CA000471858A patent/CA1248411A/en not_active Expired
-
1987
- 1987-07-27 US US07/077,983 patent/US4883412A/en not_active Expired - Fee Related
Patent Citations (4)
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)
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 |
WO2017016635A1 (de) * | 2015-07-30 | 2017-02-02 | Linde Aktiengesellschaft | Vorrichtung zur druckerhöhung eines fluids, insbesondere in form eines druckgasflaschenventils |
WO2017016642A1 (de) * | 2015-07-30 | 2017-02-02 | Linde Aktiengesellschaft | Vorrichtung zur druckerhöhung eines fluids mit einem druckbegrenzungsventil |
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 |
---|---|
DE3464276D1 (en) | 1987-07-23 |
FR2557928B1 (fr) | 1988-04-22 |
US4883412A (en) | 1989-11-28 |
FR2557928A1 (fr) | 1985-07-12 |
ATE27849T1 (de) | 1987-07-15 |
CA1248411A (en) | 1989-01-10 |
EP0148691A3 (en) | 1985-09-11 |
EP0148691B1 (de) | 1987-06-16 |
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