EP3707381B1 - Flüssigkeitszirkulator mit welliger membran - Google Patents

Flüssigkeitszirkulator mit welliger membran Download PDF

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Publication number
EP3707381B1
EP3707381B1 EP18810891.4A EP18810891A EP3707381B1 EP 3707381 B1 EP3707381 B1 EP 3707381B1 EP 18810891 A EP18810891 A EP 18810891A EP 3707381 B1 EP3707381 B1 EP 3707381B1
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EP
European Patent Office
Prior art keywords
membrane
fluid
orienting means
undulating
circulator according
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Active
Application number
EP18810891.4A
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English (en)
French (fr)
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EP3707381B8 (de
EP3707381A1 (de
Inventor
Jean-Baptiste Drevet
Harold GUILLEMIN
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.)
CorWave SA
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CorWave SA
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Publication date
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Publication of EP3707381A1 publication Critical patent/EP3707381A1/de
Publication of EP3707381B1 publication Critical patent/EP3707381B1/de
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    • 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
    • F04B43/0018—Special features the periphery of the flexible member being not fixed to the pump-casing, but acting as a valve
    • 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
    • F04B43/04—Pumps having electric drive

Definitions

  • the present invention relates to an undulating membrane fluid circulator.
  • the invention will advantageously find application in the fields of the transport of fragile fluids, such as for example medical or food, however, although particularly intended for such applications, the circulator may be used in other industrial or domestic applications.
  • the document FR 355 700 discloses a circulator according to the preamble of claim 1, characterized in that one or more elastic impermeable membranes undulate against rigid walls by operating either the transformation of a flow of liquids, vapors or gases, into electrical or mechanical energy, or the reciprocal transformation.
  • This type of circulator comprises a membrane placed in undulation in a pump body.
  • the pump body defines a propulsion chamber for the fluid to be conveyed between an inlet orifice and a discharge orifice.
  • the actuation of the membrane is carried out by drive means such as an actuator, connected to the membrane.
  • the actuation of the membrane causes undulations of the latter which transmit mechanical energy to the fluid so as to ensure its propulsion.
  • This type of circulator has many advantages compared to other pump technologies, for example volumetric reciprocating cycles or volumetric peristaltic type.
  • this type circulator is suitable for the transport of fragile fluids and has a small footprint.
  • the Applicant has observed the existence of movements of the fluid in a direction transverse to the displacement of the wave on the membrane. These transverse movements, at the edges of the membrane, reduce the pressure differential existing in the propulsion chamber between the space located above the membrane and that located below and consequently reduce the propulsion force of the upstream edges and downstream of the membrane.
  • the object of the present invention is to propose an improvement to the undulating membrane fluid circulators described in the state of the art.
  • the object of the present invention is thus to provide a circulator whose structure makes it possible to maintain a significant pressure differential at the edges of the membrane, providing the circulator with increased hydraulic power for the same size.
  • the present invention relates to a fluid circulator with an undulating membrane according to the independent claim.
  • the expression “close to one of the edges of the undulating membrane” means “closer to one of the upstream or downstream edges of the membrane than to the other of the upstream or downstream of the membrane”.
  • the first fluid orientation means is closer to one of the edges of the membrane, in this case the upstream edge, than it is to the downstream edge.
  • the structure of the circulator according to the invention consequently makes it possible to eliminate or at least to limit, at the level of at least one edge of the membrane, the transverse flows of fluid to the displacement of the wave on the membrane.
  • the deflector is a part separate from the membrane which can be in contact against the membrane or which is preferentially remote from this membrane. Furthermore, this deflector is preferably fixed to the pump body.
  • the first orientation means is arranged close to the upstream edge of the undulating membrane and a second orientation means is arranged close to the downstream edge of the undulating membrane.
  • the first means orientation extends along the upstream edge while being opposite and at a distance from this upstream edge.
  • the second orientation means extends along the downstream edge while being opposite and at a distance from this downstream edge.
  • first orientation means is rigid and relatively non-deformable with respect to the membrane which is flexible and deformable.
  • the first orientation means promotes laminar flows on either side of the orientation means up to the proximity of the upstream edge of the membrane, this reduces turbulence at the level of the upstream edge and allows better fluid propulsion efficiency by the undulating membrane.
  • the second orientation means is rigid and relatively non-deformable opposite the membrane which is flexible and deformable.
  • the second orientation means favors laminar flows on either side of the orientation means, this laminar flow thus being favored close to the downstream edge of the membrane. This reduces turbulence at the downstream edge and allows better fluid propulsion efficiency through the undulating membrane.
  • first orientation means may be connected by a flexible connection to the upstream edge of the membrane, this first orientation means forming with the membrane and with the flexible connection a sealed separation between two distinct spaces of the propulsion separated from each other by the membrane.
  • This flexible connection opposes the passage of fluid between the first orientation means and the upstream edge of the membrane, which accordingly limits the sources of turbulence in the flow.
  • This solution can, in certain cases, allow an improvement in the efficiency of the circulator.
  • the second orientation means may be connected by a flexible connection to the downstream edge of the membrane, this second orientation means forming with the membrane and with this flexible connection, a sealed separation between two spaces distinct from the propulsion chamber separated from each other by the membrane and the second orientation means.
  • This flexible connection opposes the passage of fluid between the second orientation means and the downstream edge of the membrane, which accordingly limits the sources of turbulence in the flow.
  • This solution can, in certain cases, allow an improvement in the efficiency of the circulator.
  • the first orientation means comprises at least one deflector which preferably extends along the upstream edge of the membrane and in the extension of the membrane when the membrane is observed in a direction of observation perpendicular to a direction of flow substantially parallel to the displacement of the wave on the membrane.
  • the second orientation means comprises at least one deflector which preferably extends along the downstream edge of the membrane and in the extension of the membrane when the membrane is observed in a direction of observation perpendicular to a direction of flow substantially parallel to the displacement of the wave on the membrane.
  • the upstream deflector and/or the downstream deflector also extends in a plane parallel to the plane of the membrane (see the examples of figures 1 to 3 and 5 to 8 ).
  • the chosen membrane forms a tube extending between its upstream and downstream edges which are annular, there will then be an annular upstream deflector and/or an annular downstream deflector (see the example of the figure 4 ).
  • a circulator 1 with an undulating membrane 2, deformable, in the form of a longitudinal blade, a fluid inlet 3, a pump body 4 defining a propulsion chamber 5 and a discharge orifice 6.
  • the undulating membrane 2 is associated with a drive means allowing an undulating movement of the membrane 2 between its upstream 8 and downstream 9 edges, this drive means, as well as the elements for connecting to the membrane appear in the application FR 2 744 769 , and are not represented in the figures 1 to 6 appended for ease of reading.
  • the drive means will advantageously consist of an actuator connected directly or by a connecting element to the upstream edge of the membrane 2.
  • the actuation of the membrane 2 makes it possible to create a wave propagating from the upstream edge 8 towards the downstream edge 9 of the membrane 2.
  • the fluid is itself introduced through the inlet orifice 3 into the propulsion chamber 5 then moved in the direction of the discharge orifice 6 by the undulations of the membrane 2.
  • the circulator 1 is, according to the invention, equipped with means 7 for orienting the fluid.
  • orientation means 7 arranged in the propulsion chamber 5 upstream of the undulating membrane 2.
  • orientation means 7 make it possible to channel the flow of fluid in a direction substantially parallel to the displacement of the wave on the membrane 2.
  • the fluid, arriving upstream of the membrane 2 is prevented by the orientation means 7 from moving transversely to the movement of the wave and by consequently the fluid cannot flow above or below the membrane 2 depending on the undulations of the latter. In this way the pressure differential created by the ripple is no longer compensated by a transverse fluid transfer as in the circulator described in the document FR 2 744 769 .
  • the pressure differential ensures good propulsion of the fluid by the part of the membrane close to the upstream edge 8 which consequently becomes effective.
  • the hydraulic power generated by the circulator 1 is therefore increased.
  • orientation means 7 are also provided downstream of the membrane 2 near the downstream edge 9 of the membrane 2 .
  • the operation of the orientation means 7 arranged downstream is the same as that of those located upstream of the membrane 2, namely allowing by directing the flow of fluid at the outlet of the membrane 2 to maintain a pressure differential ensuring good propulsion of the fluid by the downstream edge 9. In this way the whole of the membrane 2 is used efficiently and the hydraulic power of the circulator 1 is increased.
  • the orientation means 7 comprise at least one deflector 10.
  • the deflector 10 is advantageously made from a flexible material, so as not only to orient the fluid but also to promote its propulsion.
  • means are provided for exciting the flexible deflector so that the excitation of the deflector 10 and of the membrane are in phase opposition.
  • a rigid deflector can be used.
  • the deflector(s) 10 In order to optimize the distribution of the fluid with respect to the membrane, provision is made for the deflector(s) 10 to be arranged parallel to the displacement of the wave on the membrane 2.
  • the deflector 10 can also have a slight inclination to distribute the fluid differently between the space located above the membrane 2 and that located below or even to take account of the position of the fluid inlet orifice. 3, or that of discharge 6.
  • the deflector 10 is fixed, directly or via connecting elements, to the pump body 4.
  • the deflector 10 and the pump body can be formed in one piece.
  • a fluid circulator 1 of the circular type in this type of circulator we find a pump body 4 and an undulating membrane 2 this membrane being of discoidal shape.
  • a first deflector 10 in the form of a ring can be seen surrounding the membrane 2 at its upstream edge 8 as well as a second deflector 10 disposed between the discharge orifice 6 and the downstream edge 9 of the membrane.
  • the deflectors 10 act in the same way as those provided for the membrane 2 in the form of a longitudinal blade illustrated in figure 1 .
  • At least two superposed deflectors 10 are provided upstream and/or downstream of the membrane 2 .
  • the picture 3 we see represented three superimposed deflectors.
  • the use of several superimposed deflectors 10 makes it possible to separate the main flow into several superimposed flows of secondary fluid and makes it possible to better channeling each of these flows in order to obtain laminar flows. This advantageous characteristic will be particularly suitable when the section of the propulsion chamber 5 at the level of the deflectors is large.
  • a third type of circulator 1 is shown, namely a cylindrical circulator in which the undulating membrane 2 is of tubular shape.
  • orientation means 7 are also provided in the form of cylindrical deflectors 10 arranged upstream and downstream of the membrane 2.
  • the deflectors 10 are placed at a low distance from the edge of the undulating membrane 2, or from its support connecting it to the actuator, advantageously less than one fiftieth of the length separating the upstream 8 and downstream 9 edges of the undulating membrane 2.
  • the first means orientation 7a is arranged at a distance from the upstream edge 8 of the membrane 2 which is less than one fiftieth of the length separating the upstream 8 and downstream 9 edges.
  • the second orientation means 7b can be arranged at a distance from the downstream edge 9 of the membrane 2 which is less than one fiftieth of the length separating the upstream 8 and downstream 9 edges.
  • deflectors further from the edges of the undulating membrane 2.
  • FIG. 5 there is shown a variant embodiment of a circulator 1.
  • this variant there are complementary orientation means 11, these orientation means complementary 11 are arranged in a plane perpendicular to a plane in which the first orientation means 7a extends and make it possible to prevent a circular displacement of the fluid between the inlet orifice 3 and the undulating membrane 2.
  • complementary orientation means 11 are arranged in a plane perpendicular to a plane in which extends the second orientation means 7b and make it possible to prevent a circular displacement fluid between the discharge port and the undulating diaphragm 2.
  • the complementary orientation means 11 make it possible to increase the hydraulic power of the circulator 1.
  • the complementary orientation means 11 are, as shown in figure 5 , subject to the first orientation means 7a; advantageously the first orientation means 7a and the complementary orientation means 11 are formed in one piece.
  • the orientation means 7a, 7b are respectively constituted by deflectors 10, however, in other embodiments, other devices may be used to orient the flow, in particular by providing two separate flow inlets, each oriented towards the top or the bottom of the membrane.
  • the orientation means 7a and or 7b to comprise heat transfer elements making it possible to vary the fluidity of the fluid to be pumped and/or its temperature.
  • This embodiment of the orientation means or means is shown in figure 6 with heating elements 12 carried by the first orientation means.
  • complementary orientation means 11 which also fulfill the function of thermal diffusers since they extend from the orientation means carrying the heating elements 12.
  • the heat transfer elements carried by the orientation 7a here include the heating means 12, but they could also include cooling means and / or a coolant transfer circuit.
  • the orientation means 7 are not connected to the pump body 4 but are fixed between the drive means 13 of the membrane and the membrane 2 itself.
  • the first orientation means 7a is connected via a spring effect connection to a movable part 14 of the drive means 13 to constitute an elastically deformable guide of the first orientation means with respect to the movable part 14.
  • the movable part 14 By connecting an orientation means 7a or 7b via a spring-effect connection to the drive means 13 and more particularly to the movable part 14 of the drive means 13, the movable part 14 is both guided and damped by the orientation means 7a or 7b which is immersed in the fluid.
  • the first orientation means 7a is obtained by a deflector 10, which is in the form of a crown, comprising at the level of the connection with the movable part 14 openings 15 giving a spring effect to the connection.
  • first way orientation 7a is connected by a flexible connection 16a to the upstream edge 8 of the membrane 2, this first orientation means 7a forming with the membrane 2 and with the flexible connection 16, a sealed separation between two distinct spaces of the chamber of propulsion 5.
  • the second orientation means 7b is connected by a second flexible connection 16b to the downstream edge 9 of the membrane 2, this second orientation means 7b forming with the membrane 2 and with the second flexible connection 16b, a sealed separation between two distinct spaces of the propulsion chamber 5 separated from each other by the membrane 2.
  • first and second flexible connections 16a, 16b making it possible to form a seal between the part of the chamber of propulsion located above the membrane and that located below. This avoids the transverse flows of fluid between these two parts/spaces of the chamber during the displacement of the wave on the membrane 2.

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

Claims (12)

  1. Flüssigkeitszirkulator mit welliger Membran mit mindestens einer Einlassöffnung (3), einem Pumpenkörper (4), einer Vortriebskammer (5), mindestens einer Auslassöffnung (6) und einer welligen Membran (2), die mit einer Antriebseinrichtung (13) verbunden ist, um eine Wellenbewegung der Membran (2) zwischen ihrem stromaufwärtigen (8) und ihrem stromabwärtigen (9) Rand zu erzeugen, wobei die wellige Membran (2) geeignet ist, eine Flüssigkeit in Richtung der Auslassöffnung (6) zu bewegen, wobei der Zirkulator ferner eine erste Orientierungseinrichtung (7a) zum Orientieren einer in der Flüssigkeitsvortriebskammer (5) vorhandenen Flüssigkeit in die Nähe eines der Ränder (8; 9) der welligen Membran (2) aufweist, so dass es möglich ist, den Flüssigkeitsstrom in eine Richtung im Wesentlichen parallel zur Bewegung der Welle auf der Membran (2) zu kanalisieren, dadurch gekennzeichnet, dass die erste Orientierungseinrichtung (7a) über eine federgespannte Verbindung mit einem beweglichen Abschnitt (14) der Antriebseinrichtung (13) verbunden ist, um eine elastisch verformbare Führung der ersten Orientierungseinrichtung bezüglich des beweglichen Abschnitts (14) bereitzustellen.
  2. Flüssigkeitszirkulator nach Anspruch 1, wobei die erste Orientierungseinrichtung (7a) in der Nähe des stromaufwärtigen Randes (8) der welligen Membran (2) angeordnet ist und wobei eine zweite Orientierungseinrichtung (7b) in der Nähe des stromabwärtigen Randes (9) der welligen Membran (2) angeordnet ist.
  3. Flüssigkeitszirkulator nach einem der Ansprüche 1 oder 2, wobei die erste Orientierungseinrichtung (7a) mindestens ein Leitblech (10) aufweist.
  4. Flüssigkeitszirkulator nach Anspruch 2, wobei die zweite Orientierungseinrichtung (7b) mindestes ein Leitblech (10) aufweist.
  5. Flüssigkeitszirkulator nach Anspruch 3 oder 4, wobei das Leitblech (10) flexibel ist.
  6. Flüssigkeitszirkulator nach Anspruch 3 oder Anspruch 4, wobei das Leitblech (10) im Wesentlichen parallel zur Bewegung der Welle auf der Membran (2) angeordnet ist.
  7. Flüssigkeitszirkulator nach Anspruch 3, der mindestens zwei übereinander angeordnete Leitbleche (10) aufweist, so dass es möglich ist, den Hauptflüssigkeitsstrom in mehrere, übereinander strömende Ströme zu kanalisieren.
  8. Flüssigkeitszirkulator nach einem der Ansprüche 1 bis 6, wobei die ersten Orientierungseinrichtungen (7a) Wärmeübertragungselemente aufweisen, die die Temperatur der Flüssigkeit ändern können.
  9. Flüssigkeitszirkulator nach einem der Ansprüche 1 bis 7, wobei die erste Orientierungseinrichtung (7a) in einem Abstand vom stromaufwärtigen (8) oder stromabwärtigen Rand der Membran (2) angeordnet ist, der weniger als ein Fünfzehntel der Länge beträgt, die den stromaufwärtigen (8) vom stromabwärtigen (9) Rand trennt.
  10. Flüssigkeitszirkulator nach einem der Ansprüche 1 bis 9, der komplementäre Orientierungseinrichtungen (11) aufweist, die in einer Ebene senkrecht zu einer Ebene angeordnet sind, in der sich die erste Orientierungseinrichtung (7a) erstreckt.
  11. Flüssigkeitszirkulator nach Anspruch 10, wobei die komplementären Orientierungseinrichtungen (11) an der ersten Orientierungseinrichtung (7a) befestigt sind.
  12. Flüssigkeitszirkulator nach Anspruch 1, wobei die erste Orientierungseinrichtung (7a) über eine flexible Verbindung (16) mit dem stromaufwärtigen Rand (8) der Membran (2) verbunden ist, wobei die erste Orientierungseinrichtung (7a), zusammen mit der Membran (2) und der flexiblen Verbindung (16), eine dichte Sperre zwischen zwei verschiedenen Räumen der Vortriebskammer (5) bildet, die durch die Membran (2) voneinander getrennt sind.
EP18810891.4A 2017-11-10 2018-11-09 Flüssigkeitszirkulator mit welliger membran Active EP3707381B8 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1760583A FR3073578B1 (fr) 2017-11-10 2017-11-10 Circulateur de fluide a membrane ondulante
PCT/EP2018/080749 WO2019092175A1 (fr) 2017-11-10 2018-11-09 Circulateur de fluide a membrane ondulante

Publications (3)

Publication Number Publication Date
EP3707381A1 EP3707381A1 (de) 2020-09-16
EP3707381B1 true EP3707381B1 (de) 2022-02-16
EP3707381B8 EP3707381B8 (de) 2022-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18810891.4A Active EP3707381B8 (de) 2017-11-10 2018-11-09 Flüssigkeitszirkulator mit welliger membran

Country Status (7)

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US (1) US11512689B2 (de)
EP (1) EP3707381B8 (de)
JP (1) JP7158061B2 (de)
CN (1) CN111433460B (de)
AU (1) AU2018365313B2 (de)
FR (1) FR3073578B1 (de)
WO (1) WO2019092175A1 (de)

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FR3073578A1 (fr) 2019-05-17
EP3707381B8 (de) 2022-03-23
AU2018365313B2 (en) 2024-05-09
WO2019092175A1 (fr) 2019-05-16
US20210172429A1 (en) 2021-06-10
CN111433460B (zh) 2022-10-04
FR3073578B1 (fr) 2019-12-13
AU2018365313A1 (en) 2020-05-21
CN111433460A (zh) 2020-07-17
EP3707381A1 (de) 2020-09-16
JP7158061B2 (ja) 2022-10-21
JP2021502513A (ja) 2021-01-28

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