EP1092093B1 - Membranpumpe und membran für diese pumpe - Google Patents

Membranpumpe und membran für diese pumpe Download PDF

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Publication number
EP1092093B1
EP1092093B1 EP99926554A EP99926554A EP1092093B1 EP 1092093 B1 EP1092093 B1 EP 1092093B1 EP 99926554 A EP99926554 A EP 99926554A EP 99926554 A EP99926554 A EP 99926554A EP 1092093 B1 EP1092093 B1 EP 1092093B1
Authority
EP
European Patent Office
Prior art keywords
membrane
enclosure
central portion
chamber
fluid
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.)
Revoked
Application number
EP99926554A
Other languages
English (en)
French (fr)
Other versions
EP1092093A1 (de
Inventor
Bruno Lamorlette
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9528078&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1092093(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP1092093A1 publication Critical patent/EP1092093A1/de
Application granted granted Critical
Publication of EP1092093B1 publication Critical patent/EP1092093B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • 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
    • F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
    • F04B43/026—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel each plate-like pumping flexible member working in its own pumping chamber

Definitions

  • the invention relates to a device for transmitting a volume of fluid under pressure, in particular intended for a pump petrol for a direct injection engine. She is also relating to a pump equipped with such a device.
  • the invention relates, according to its first aspect, a device for transmitting a volume of fluid under pressure, comprising at least one enclosure and one deformable membrane of generally rounded shape, this membrane comprising a central part movable between two extreme positions, a peripheral part by which it is fixed in said enclosure to define a first and a second fluid chamber and, between its part peripheral and its central part, an intermediate part whose cross-section in a transverse plane has a shape substantially U-shaped.
  • Such a device is for example described in the documents FR 2,422,086 and US 4,153,391.
  • a device for transmitting a volume of fluid under pressure for example intended for a fuel pump, comprises conventionally an enclosure and a fixed deformable membrane in said enclosure to define two fluid chambers.
  • a mechanism such as a pump pistons prints back and forth to a piston which moves into the first chamber, containing for example oil.
  • This movement causes a constant volume displacement of the oil in the first chamber.
  • This displacement that of the membrane itself in the second room, this one containing for example gasoline.
  • the movement of the membrane has the effect of repressing gasoline, especially to a collector.
  • a system gas supply to the second bedroom is planned to fill this room again.
  • the membrane therefore has both function of ensuring sealing between the liquids contained in each of the rooms and allow the movement of the second liquid due to displacement of the first liquid.
  • the membrane of such a device is substantially flat and it is fixed in the enclosure by means from its peripheral edge.
  • such a membrane can deform on either side of its rest position.
  • the object of the invention is to overcome these drawbacks by proposing a membrane device for the transmission of a volume of fluid under pressure, in which the membrane does not not likely to deteriorate under the effect of constraints to which it is subjected during use, and this thanks to a particular geometry and characteristics allowing this membrane to work optimally.
  • the device of the invention is essentially characterized in that the mounting of the membrane in the enclosure is such that, what whatever the position of the central part of the membrane, the curved bottom of the U-shaped intermediate part is not contact with the walls of the enclosure or with any other part of the device, so that said part intermediate is able to wind and / or unwind freely during movement of the membrane, during operation of the device, without the peripheral part of the membrane undergoes traction.
  • plane transverse a plane perpendicular to that in which extends the membrane itself and passing through an axis of symmetry of the membrane.
  • the membrane is mounted in the device so that at mid-course, it presents its shape in the state free.
  • connection parts of the branches of the U-shaped intermediate part with the part central and the peripheral part of the membrane rest on parts of the device whose shape they match.
  • connection parts can rest freely on said parts or be adhered to them, for example by overmolding.
  • the thickness of the intermediate part of the membrane is lower than that of the central part and the part membrane device.
  • the device comprises a pusher resiliently mounted in the second fluid chamber and which is attached to the central part of the membrane.
  • this pusher comprises a part for guiding the displacement of the membrane.
  • the membrane has means to avoid its deterioration against sharp edges of said enclosure, consisting in particular, in its central part, of a shape hollow or in a rigid valve fixed to the membrane.
  • the device comprises means for evacuate the fluid from the first chamber, which may be trapped between said enclosure and the intermediate part in U of the membrane, these means being notably constituted by drainage channels made in the device itself or even in said valve.
  • the peripheral part of the membrane has advantageously a seal.
  • the transmission device a volume of pressurized fluid according to the invention comprises several membranes which are formed in a single block.
  • the invention also relates to a pump, such as a pump. gasoline engine for direct injection, equipped with a device for transmitting a volume of fluid under pressure according to the invention.
  • the device transmission of a volume of fluid under pressure forms an enclosure in which is fixed a membrane 1.
  • This membrane thus makes it possible to define a first chamber of fluid 2, located here above the membrane 1 and a second fluid chamber 3, located here under the membrane 1.
  • In the first chamber 2 can move a piston 4.
  • the piston 4 is in high position.
  • a volume fluid constant which can in particular be oil.
  • a pusher 5 which is resiliently mounted so as to push the membrane 1 against the spacer 6.
  • the chamber 3 is filled with a fluid, especially gasoline.
  • This elastic mounting is carried out by means of a spring 7 which is mounted between the wall of the chamber 3 and the bottom 50 of the button.
  • the pusher 5 is extended by a cylindrical guide part 51 which is designed to slide in a corresponding bore 3a of the bedroom 3.
  • the membrane 1 has a generally circular shape. This also appears on the Figure 4 which shows three membranes 41, 42, 43 similar to the membrane 1, formed in a single block.
  • the membrane 1 could have another general shape rounded, for example an oval shape. However, it is a circular shape which seems the most advantageous.
  • Figure 1 shows the membrane 1 in section along a diameter.
  • the membrane has a central part 10, under which the pusher 5 is fixed, a peripheral part 11 by which the membrane is fixed in the device, and an annular intermediate portion 12 which has, in diametral section, a substantially U-shaped. This part U-shaped is not in contact with any part of the device.
  • the peripheral part 11 of the membrane 1 preferably has an annular seal sealing 13.
  • a function of the membrane 1 being to ensure sealing between the liquid contained in the first chamber 2 and that contained in the second chamber 3, this seal 13 contributes to this function being well ensured by the membrane.
  • channels 60, 61 are provided in the spacer 6. These channels have two parts substantially perpendicular, one of which opens into the space 2a between the bottom of the U-shaped part 12 and the spacer 6 and the other, in the orifice 6a of the spacer.
  • the opening 6a of the spacer 6 has a reduced size compared to the upper part 2b of chamber 2.
  • this tightening in bedroom 2 is not mandatory.
  • the spacer could be made of a room with the rest of the device.
  • the pusher 5 has lateral orifices 52, 53, the role of which will be explained in the continuation of the description.
  • the membrane 1 In the position illustrated in FIG. 1, the membrane 1 is in the high position.
  • the pusher 5 and the piston 4 are also in their respective high position.
  • the pusher can guide the movement of the membrane in the chamber 3.
  • the liquid contained in chamber 6, for example petrol, is pumped back to outside the device.
  • the orifices 52, 53 made in the pusher 5 allow to evacuate the fluid contained in the space 3b between the bottom of the U and the wall of the chamber 3.
  • the means of evacuation of the liquid contained in the chamber 3 are not illustrated in the figures.
  • chamber 3 When the device according to the invention equips a pump gasoline for a direct injection engine, chamber 3 conventionally leads into a collector which is itself connected to the engine.
  • the fluid contained in the chamber 3 is not evacuated only if it has reached a predetermined pressure.
  • the membrane 1 When the pusher switches to the high position illustrated in the Figure 1, the membrane 1 is again pressed against the spacer 6, thanks to the elastic means 7. The membrane 1 is then in the high position illustrated in the figure 1. When changing from the low position to the high position, the membrane is still guided in its movement thanks to the guide part 51 of the pusher 5.
  • the chamber 3 is again filled with liquid such as gasoline, by suitable means which are not illustrated.
  • the mounting of the membrane in the enclosure is such that the bottom of the intermediate part 12 in U is not in contact with the walls of the enclosure or with any other part of the device.
  • the intermediate part 12 can be unroll and unwind freely while moving the membrane during operation of the device, without the peripheral part 11 of the membrane does not undergo traction.
  • the membrane is preferably mounted in the device so that halfway, that is to say at an intermediate position between the high position illustrated in Figure 1 and the low position illustrated in Figure 2, the membrane has its shape to the free state, that is to say without constraints.
  • the connecting parts between the constituent parts of the membrane have a particular shape.
  • connection part 14 between a branch of the intermediate part 12 and the peripheral part 11 has a suitable shape to match the shape of the wall 30 of bedroom 3.
  • connection part 15 between the other branch of the intermediate part 12 and the central part 10 has a suitable shape to match that of the pusher 5.
  • connecting parts 14 and 15 can either rest freely on the parts of the device whose they follow the form, or be adhered to these last, for example by overmolding.
  • the membrane 1 is pushed against the spacer 6 when it is in position high.
  • the opening 6a formed in the spacer 6 has edges which can cause damage to the membrane.
  • the central part 10 of the membrane has a hollow shape 10a which makes it possible to avoid contact between the membrane and the edges of the orifice 6a.
  • a rigid valve 8 is fixed on the central part 10 of the membrane.
  • this valve 8 also makes it possible to avoid a direct contact between the membrane 1 and the sharp edges of the spacer 6, when the membrane is in the high position.
  • valve 8 When this valve 8 is provided, the evacuation channels between parts 2a and 2b of chamber 2 can be made in valve 8 itself. These channels consist of grooves, such as those referenced 8a in FIG. 3.
  • the thickness of the membrane is advantageously lower in the U-shaped intermediate part 12 than in the central 10 and peripheral parts 11.
  • the stiffness of the membrane in the intermediate part 12 is thus reduced by such that the intermediate part 12 only works unwinding. Furthermore, this lower stiffness avoids transmit the forces undergone by the membrane in this intermediate part, towards the peripheral part fixed in the device.
  • the associated membranes can be assembled in a block unit.
  • Figure 4 shows a block of three membranes 41, 42 and 43 which are connected together by flat walls, so as to form a unitary block.
  • the device for transmitting a volume of fluid under pressure which has just been described can in particular be used to equip a fuel pump for an injection engine direct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (12)

  1. Vorrichtung zum Übertragen eines Fluidvolumens unter Druck, mit zumindest einem Gehäuse und einer verformbaren Membran (1) von im allgemeinen runder Form, wobei diese Membran einen Mittelbereich (10) aufweist, der zwischen zwei Endstellungen verlagerbar ist, einen Umfangsbereich (11), mit dem sie im genannten Gehäuse befestigt ist, um eine erste Fluidkammer (2) und eine zweite Fluidkammer (3) zu definieren, und mit einem zwischen ihrem Umfangsbereich (11) und ihrem Mittelbereich (10) liegenden Zwischenbereich (12), dessen Querschnitt in einer Querebene im wesentlichen eine U-Form besitzt, dadurch gekennzeichnet, dass die Lagerung der Membran (1) im Gehäuse derart ist, dass der gekrümmte Boden des U-förmigen Zwischenbereichs (12) unabhängig von der Stellung des Mittelbereichs der Membran weder mit den Gehäusewänden noch mit einem Teil der Vorrichtung in Kontakt steht, so dass der genannte Zwischenbereich (12) bei Verlagerungen der Membran während des Betriebs der Vorrichtung sich frei aufrollen und/oder abrollen kann, ohne dass der Umfangsbereich (11) der Membran einer Zugkraft ausgesetzt ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Membran (1) so in der Vorrichtung gelagert ist, dass die Membran auf halbem Weg ihre Form im freien Zustand aufweist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Anschlussteile (14, 15) der Schenkel des U-förmigen Zwischenbereichs (12) mit dem Mittelbereich (10) und dem Umfangsbereich (11) der Membran (1) auf Teilen (5, 30) der Vorrichtung aufliegen, an deren Form sie sich anschmiegen.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die genannten Anschlussteile (14, 15) an den genannten Teilen (5, 30) der Vorrichtung fixiert sind, an deren Form sie sich anschmiegen, insbesondere durch Eingießen.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Zwischenbereich (12) der Membran in seiner Dicke geringer ist als der Mittelbereich (10) und der Umfangsbereich (11) der Membran.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass sie einen Stößel (5) aufweist, der federnd an der zweiten Fluidkammer (3) gelagert und am Mittelbereich (10) der Membran (1) befestigt ist.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der genannte Stößel (5) einen Führungsbereich (51) für die Verlagerung der Membran (1) aufweist.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Membran (1) Mittel aufweist, um deren Beeinträchtigung durch scharfe Kanten des genannten Gehäuses zu vermeiden, die in ihrem Mittelbereich (10) insbesondere aus einer Hohlform (10a) oder aus einer starren Klappe (8) bestehen, die an der Membran befestigt ist.
  9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass sie Mittel aufweist, um das Fluid aus der ersten Kammer (2) abzuführen, das zwischen dem genannten Gehäuse und dem U-förmigen Zwischenbereich (12) der Membran eingeschlossen werden kann, wobei diese Mittel insbesondere aus Abführkanälen (60, 61; 8a) bestehen, die in der Vorrichtung selbst oder aber in der genannten Klappe (8) ausgeführt sind.
  10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Umfangsbereich (11) der Membran (1) eine Dichtung (13) enthält.
  11. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass sie mehrere Membrane (41, 42, 43) enthält, die aus einem Block gebildet sind.
  12. Pumpe, wie etwa Benzinpumpe für einen Motor mit Direkteinspritzung, mit einer Vorrichtung zum Übertragen eines Fluidvolumens unter Druck nach einem der Ansprüche 1 bis 11.
EP99926554A 1998-06-30 1999-06-28 Membranpumpe und membran für diese pumpe Revoked EP1092093B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9808332 1998-06-30
FR9808332A FR2780476B1 (fr) 1998-06-30 1998-06-30 Dispositif de transmission d'un volume de fluide sous pression et membrane pour un tel dispositif
PCT/FR1999/001548 WO2000000743A1 (fr) 1998-06-30 1999-06-28 Pompe a membrane et membrane pour une telle pompe

Publications (2)

Publication Number Publication Date
EP1092093A1 EP1092093A1 (de) 2001-04-18
EP1092093B1 true EP1092093B1 (de) 2003-01-08

Family

ID=9528078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99926554A Revoked EP1092093B1 (de) 1998-06-30 1999-06-28 Membranpumpe und membran für diese pumpe

Country Status (4)

Country Link
EP (1) EP1092093B1 (de)
DE (1) DE69904823D1 (de)
FR (1) FR2780476B1 (de)
WO (1) WO2000000743A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2010005552A (es) 2007-11-21 2010-06-02 Smith & Nephew Aposito para heridas.
GB201015656D0 (en) 2010-09-20 2010-10-27 Smith & Nephew Pressure control apparatus
US9084845B2 (en) 2011-11-02 2015-07-21 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
CN104507513B (zh) 2012-03-20 2017-04-12 史密夫及内修公开有限公司 基于动态占空比阈值确定的减压治疗系统的控制操作
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
WO2016103032A1 (en) 2014-12-22 2016-06-30 Smith & Nephew Plc Negative pressure wound therapy apparatus and methods
CN107246376A (zh) * 2017-07-12 2017-10-13 浙江卡韦德新能源科技有限公司 柴油发动机尾气处理尿素泵的膜片总成

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153391A (en) * 1975-05-29 1979-05-08 Carr-Griff, Inc. Triple discharge pump
US4086036A (en) * 1976-05-17 1978-04-25 Cole-Parmer Instrument Company Diaphragm pump
DE2815212A1 (de) * 1978-04-08 1979-10-11 Brumme Kg Effbe Werk Membrananordnung mit einer bewegungsmembran
US4644847A (en) * 1983-05-16 1987-02-24 Fluitron, Inc. Reduction of failure incidence of metallic diaphragms for compressors
IL83259A (en) * 1987-07-20 1992-05-25 D F Lab Ltd Disposable cell and diaphragm pump for use of same
FR2698665B1 (fr) * 1992-11-27 1995-02-17 Imaje Pompe étanche à piston.
DE4327969C2 (de) * 1993-08-19 1997-07-03 Ott Kg Lewa Hydraulisch angetriebene Membranpumpe
JPH09184484A (ja) * 1995-11-27 1997-07-15 Ingersoll Rand Co ポンプ隔膜

Also Published As

Publication number Publication date
DE69904823D1 (de) 2003-02-13
FR2780476A1 (fr) 1999-12-31
FR2780476B1 (fr) 2000-09-15
EP1092093A1 (de) 2001-04-18
WO2000000743A1 (fr) 2000-01-06

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