EP2013477A2 - Procédé et dispositif de convoyage automatisé de liquides ou de gaz - Google Patents

Procédé et dispositif de convoyage automatisé de liquides ou de gaz

Info

Publication number
EP2013477A2
EP2013477A2 EP07723923A EP07723923A EP2013477A2 EP 2013477 A2 EP2013477 A2 EP 2013477A2 EP 07723923 A EP07723923 A EP 07723923A EP 07723923 A EP07723923 A EP 07723923A EP 2013477 A2 EP2013477 A2 EP 2013477A2
Authority
EP
European Patent Office
Prior art keywords
pumping
chambers
pumping chambers
volume
common
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Withdrawn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
EP07723923A
Other languages
German (de)
English (en)
Inventor
Frank Bartels
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.)
Bartels Mikrotechnik GmbH
Original Assignee
Bartels Mikrotechnik GmbH
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 Bartels Mikrotechnik GmbH filed Critical Bartels Mikrotechnik GmbH
Publication of EP2013477A2 publication Critical patent/EP2013477A2/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/003—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by piezoelectric means
    • 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
    • F04B43/043—Micropumps
    • F04B43/046—Micropumps with piezoelectric drive
    • 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
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/14—Machines, pumps, or pumping installations having flexible working members having peristaltic action having plate-like flexible members

Definitions

  • the present invention relates to a method and apparatus for the automated conveyance of liquids or gases, and more particularly to a pump.
  • An example of an open pump is a rotary impeller or a conveyor belt with liquid vessels.
  • Common feature of all closed pumps that a delimited volume, which is located for example in a chamber or a hose, by changing, that is reduction, of the volume available for the pumping medium (chamber volume) is transported in the direction of a pump outlet, and then new pumping medium is sucked in by enlargement of the pumping chamber volume.
  • the direction of flow is generally dictated by appropriate valves.
  • piston pumps are known in which a piston during the lowering process displaces the volume in the pumping chamber through an outlet valve and sucks new pumping medium through an inlet valve during the subsequent lifting process, or diaphragm pumps in which a diaphragm forming a wall of the pumping chamber periodically raises and lowers and thus increases or decreases the chamber volume.
  • the change in volume is sinusoidal, resulting in an approximately sinusoidal output of Pump medium results, this is done only during the positive half-wave; the negative half-wave is used to aspirate new pumping medium.
  • peristaltic pumps in which an elastically deformable hose is divided into individual segments by means of movable, mechanical aids. The mechanical aids move the segments along the conveying direction of the tube, which is accompanied by a transport of the pumping medium from the inlet to the outlet.
  • the discharge is interrupted-continuous.
  • impeller pumps which convey a liquid by means of a screw arranged in a liquid channel or by means of a turbine.
  • Fig. 1 shows a schematic representation of the delivery rate P of a single-chamber Koibenpumpe and a peristaltic pump over a complete pumping cycle. The time t is plotted on the abscissa.
  • the two above-described pump variants have the disadvantage that the delivery rate, ie the pumping volume as a function of time, varies greatly over a single pumping cycle (period), as shown in FIG.
  • the delivery behavior of a piston pump is indicated by the solid or dashed sinusoidal curve, and the delivery behavior of a peristaltic pump is shown as a dotted rectangular curve, which becomes zero at the beginning and at the end of the full pumping cycle.
  • the first half of the pumping cycle 1 is used to empty the pumping chamber ( Figure 1, solid curve), carried during the second half of the pumping cycle 1 no spreading, but only a suction of new pumping medium (dashed curve) ,
  • the pumping rate here corresponds schematically to the height of the curve; If one looks at the exit in isolation, one first observes a weak, then continuous swelling, then decreasing and finally expiring fluid flow, followed by a break in which no fluid is conveyed at all.
  • the pumping rate can be kept constant during the dispensing, but it always remains the Ansaugpause at the end of dispensing.
  • Peristaltic pumps work with a mechanical aid (clamping device or similar), which squeezes a part of the hose and thus creates a kind of "piston wall". This is then moved in the direction of the pump and hose outlet, wherein the volume located in front of her is further driven, and behind it forms a negative pressure, through which new fluid is sucked.
  • peristaltic pumps achieve a fairly constant delivery rate over a period of time dependent on the length of the individual delivery segments; however, this will abruptly become zero at recurring intervals if one segment ends at a time.
  • the mechanical aid defining this segment lifts off the hose at the end of the conveying cycle 1 .
  • the object of the present invention is therefore to provide a method which, with a high delivery rate, enables the greatest possible pulsation-free delivery of a pumped medium.
  • the object of the present invention is also to specify a device which is suitable for the method according to the invention and which can also be produced in a miniaturized manner in a simple and cost-effective manner.
  • FIG. 1 shows the delivery rate of a conventional piston pump and a conventional peristaltic pump.
  • Fig. 2 is a schematic representation of an apparatus according to a first embodiment of the present invention
  • Fig. 3 is a schematic representation of an apparatus according to a second embodiment of the present invention.
  • FIG. 4a and b is a schematic representation of an apparatus according to a third embodiment of the present invention.
  • Fig. 5a and b a modification of the device according to the invention of Fig. 4;
  • FIG. 6 shows a schematic representation of the drive principle according to the invention and steps of the method according to the invention; and a further modification of the device according to the invention of FIGS. 4 and 5; 7a the stroke of the displacers of the device of FIG. 6, FIG. 7b the total stroke of the device of FIG. 6, and FIG. 7c the pumping power of a device according to the invention as a function of the number of chambers;
  • FIG. 9a shows a device according to a further embodiment of the present invention
  • FIG. 9b shows a modification of the embodiment of FIG. 9a
  • Fig. 10 is a schematic representation of an apparatus according to another embodiment of the present invention.
  • the present invention relates to a device for delivering liquid and / or gaseous media having a number of at least two pumping chambers whose volumes change periodically during operation, each pumping chamber having at least one inflow and outflow valve, and all pumping chambers having a common main inlet and outlet have a common main drain, and wherein the pumping chambers at least one drive is associated, which is designed such that the volumes of the pumping chambers change with a phase shift of 2 ⁇ / number of chambers.
  • the present invention also relates to a device for conveying liquid and / or gaseous media having a number of at least two pumping chambers whose volumes change periodically during operation, the pumping chambers being designed and arranged such that at least two adjacent pumping chambers form a common wall , which is designed such that it serves to change the volume of the adjacent pumping chambers.
  • the common walls may be coupled to the drives and / or comprise the drives.
  • a device also comprises a device with a multiplicity of pumping chambers and advantageously with less than 7 pumping chambers and more advantageously with 3 pumping chambers, at least a number of drives corresponding to the number of pumping chambers being provided for driving the pumping chambers Pumping chambers are suitably designed and arranged such that all pumping chambers have a first common drive with a first adjacent pumping chamber and a second common drive with a second adjacent pumping chamber, wherein the drives are designed such that they change the volume of each adjacent Pump chambers serve.
  • the drive can be advantageously at least partially formed as a vibrating diaphragm and advantageously designed as a piezo disc actuator.
  • a device according to the invention also suitably comprises a pressure-decoupled drain.
  • the present invention also relates in particular to a method for conveying liquid and / or gaseous media using the above-mentioned device according to the invention, wherein the device is suitably controlled in such a way that the volumes of at least two pumping chambers change with a phase shift of 2 ⁇ / number of chambers.
  • the method according to the invention provides a method with a particularly high pumping capacity and uniform delivery rate.
  • Fig. 2 shows a schematic representation of a device 1 according to the invention with two adjacently arranged pumping chambers 10, for example, and advantageously have about the same volume V and each have an inlet valve 11 and an outlet valve 12 and a common main inlet 110 and a common main drain 120.
  • the two adjacent pump chambers 10 have a common drive A, which is designed as an at least partially movable common wall 13.
  • the volume V of each chamber 10 is increased, while at the same time the volume of the other chamber 10 is reduced, so that with suitable activation of the drive A, a comparison with a conventional device of FIG Fig. 1 improved pump power P is achieved.
  • the pumping chambers 10 of the device 1 of FIG. 2 may each comprise a further drive in addition to the common drive A on the sides opposite the drive A, whereby the pumping power P is further improved.
  • Fig. 3 shows a schematic representation of a device 1 according to the invention with three adjacently arranged pumping chambers 10, for example, and advantageously have about the same volume V and each have an inlet valve 11 and an outlet valve 12 and a common Hauptzufluß 110 and a common main outlet 120.
  • the structure of the device 1 of Fig. 3 corresponds substantially to the structure of the device 1 of Fig. 2, wherein the central pumping chamber 10 with its adjacent pumping chambers 10 each have a common drive A, suitably as an at least partially movable common wall thirteenth can be trained. With suitable control of the drives A, an improved pumping capacity and more uniform delivery rate are achieved compared to the prior art of FIG. 1 and the embodiment of FIG. 2.
  • the two outer pumping chambers 10 of the device of FIG. 1 may also comprise further drives A, which may suitably also be designed as movable walls 13.
  • FIG. 4 shows a schematic representation of a modification of the device 1 according to the invention of FIG. 3, which substantially corresponds to the device 1 of FIG. 3, with the difference that two middle pumping chambers 10 comprise a common drive A and also both middle pumping chambers 10 are arranged adjacent to a third pumping chamber 10, and with the third pumping chambers 10 have a common drive A.
  • this is structurally advantageously achieved such that two outer pump chambers 10 are connected to one another via a channel 101 and in this way the third pumping chamber 10 is provided.
  • FIG. 4a shows a schematic plan view of the device 1 according to the invention
  • FIG. 4b shows a schematic side view from the direction S of FIG. 4a.
  • FIG. 5 shows a schematic representation of a modification of the device 1 of Fig. 4, which differs from the above-described embodiment of Fig. 4 only by the arrangement of the intake valves 11 and the exhaust valves 12.
  • FIG. 5a shows a schematic longitudinal section through the device 1 according to the invention
  • FIG. 5b shows a schematic perspective illustration of the section of FIG. 5a.
  • the device 1 of FIGS. 5 and 6 comprises the pumping chambers 10 which are arranged in the shape of a stape and are provided by the drives A and movable walls 13 are separated from each other.
  • Each pumping chamber 10 has an inlet valve 11 and an outlet valve 12.
  • the volume V of the respective pump chamber 10 bounded by these walls 13 is changed cyclically.
  • the special conveying effect is achieved in that a pumping chamber 10 is bounded by two walls 13 which are out of phase with respect to sinusoidal oscillation.
  • the walls 10 may be formed, for example, as a cylindrical displacer, which - starting from a rest position - at least partially empty their respective assigned volume V or increase its volume accordingly.
  • the illustrated principle also applies to differently designed displacers, and / or those whose movement is not exactly sinusoidal, as long as their movement pattern is similar and with a phase shift of the displacement of each about 120 ° or 240 °.
  • FIGS. 6 a, b and c show, by way of example, three characteristic states during operation of the device 1 during a complete pumping cycle.
  • the positions of the displacer 13 of Fig. 6a, b and c are also shown in Fig. 7 (vertical lines at 1/2 ⁇ , ⁇ , and 3/2 ⁇ ).
  • the arrows of Fig. 6 indicate the directions of movement and the flow of the pumping medium, wherein a missing arrow means standstill.
  • the position of the valves provided with reference numerals is open and the valves are closed without reference numerals. If two displacers 13 move relative to one another, the pumping chamber pressure increases and the volume flows out (see, for example, FIG. 6a and b) left pumping chamber). If the displacers 13 move away from each other in relative terms, the pumping chamber pressure is reduced and the volume flows in (see, eg, 6a, middle pumping chamber and FIG. 6b, left pumping chamber). If the displacers 13 move in unison, the pumping chamber volume does not change and no medium flows in or out (see, for example, FIG. 6b, middle chamber).
  • the formulas underlying the principle according to the invention are named and explained below. Here too, reference is made to the above example of a device 1 according to the invention of FIGS. 5 and 6; Analogously, the formulas can be rewritten to any other pumping chamber number n.
  • the device 1 comprises three pumping chambers 10 each with a suitable manner and for the sake of simplicity about the same volume V, which are marked here with V1, V2 and V3. It is clear that the volumes V can also differ.
  • the volume V of one of the pumping chambers 10 is composed of two half-volumes connected by means of a channel 101 so that effectively only a single volume V is to be considered.
  • a pump cycle has the length 2 ⁇ .
  • the delivery rate of a single chamber 10 is defined by the amount of transported volume per unit time. This results from the difference of the Verdrängerhübe m, which enclose the respective volume V multiplied by the base area A of the displacer 13, which are assumed for simplicity also as about the same size.
  • the total pump power P is composed of the individual volume flows:
  • Each chamber 10 suitably has an outlet valve 12 and an inlet valve 11 arranged functionally as shown in FIG.
  • check valve The function of a check valve can be described very simply by passing the flow only at positive pressure, but not at negative.
  • the displacer 13 displacing the chamber volume V carry out cyclic movements. If the stroke m corresponds to a sine wave, for example:
  • m is the stroke
  • M the amplitude
  • ⁇ the cycle time the amplitude
  • ⁇ the angular frequency the phase shift
  • phase shifts of the displacer 13 with each other thus amount in the example considered with three chambers 10 2 A, ⁇ (corresponding to 120 °) or the 4/3 ⁇ (corresponding to 240 °).
  • the total delivery rate G is composed of the individual delivery rates of two respectively adjacent pumping chambers 10. It should be noted that the principle according to the invention can only be implemented if the outflow quantity flowing through an outlet valve 12 is independent of the quantity of the respective other outlet valves 12, ie the chamber outlets are pressure-decoupled.
  • the delivery rate P also increases with increasing chamber number n, the question arises as to whether the delivery rate P can be arbitrarily increased or whether there is a limit value which is not reached or even with a theoretical number of infinitely many chambers can be exceeded.
  • each of the devices has its own entrance, which is connected to a common main inlet, and its own outlet, which opens into a delivery volume with atmospheric pressure.
  • the total delivery rate of separate devices is (with a small number of chambers) significantly lower than the total delivery rate of one of the device 1 according to the invention. This effect is based on the fact that a significantly greater displacement volume can be generated by means of the displacers 13.
  • a device 1 according to the invention of the embodiment of Figs. 2 and 3 also has improved delivery capacity and lower pulsation than the prior art, as shown by calculations similar to the above calculations for the embodiment of Figs can be. It is also clear that the embodiments of FIGS. 4 to 6 in addition to the drives A shown in the drawings may have further drives A.
  • FIG. 8 shows a schematic representation of a device 1 according to the invention according to a further embodiment of the present invention with three adjacently arranged pump chambers 10, whose common drives A are also suitably designed as at least partially movable common walls 13, wherein the common walls 13 arranged approximately in a star shape are and the device 1 is approximately cylindrical.
  • FIG. 8a shows a schematic plan view of the device 1
  • FIG. 8b a schematic side view of the direction S of FIG. 8a.
  • FIG. 8 shows that the inlet valves 11 and outlet valves 12 are arranged, for example and advantageously, on the opposite walls of the device 1.
  • FIG. 9a shows a schematic representation of a further device 1 according to the invention with three pump chambers 10 arranged adjacently, which for example and advantageously also have approximately the same volume V and which are arranged approximately along a ring.
  • the three pumping chambers 10 each comprise a first and a second chamber space, which are connected to one another via a channel 101.
  • the three pumping chambers 10 are arranged successively such that each pumping chamber 10 has a common wall 13 with two further pumping chambers 10, the common wall 13 being suitably at least partially designed as a common drive A of two pumping chambers 10.
  • FIG. 9b shows a schematic representation of a modification of the device 1 of Fig. 9a with the pumping chambers 10, which are also adjacent and arranged approximately along a ring, each pumping chamber 10 is connected via a channel 101 with two adjacent pumping chambers 10 and the channels 101 each comprise suitable common drives A.
  • FIGS. 8 and 9 may also comprise more than three pumping chambers 10 and, in addition to the drives A, may also comprise further drives A.
  • FIG. 10 shows a schematic representation of a device 1 according to the invention according to a further embodiment of the present invention with likewise three or more pumping chambers 10 and corresponding drives A, inlet valves 11, outlet valves 12, a common main inlet 110 and a common main outlet 120.
  • the pumping chambers 10 are arranged approximately channel-like and meandering.
  • the channel-like pump chambers 10 according to the invention have common drives A, which are likewise designed as at least partially common movable wall 13 and are advantageously arranged successively along a line.
  • the device 1 according to the invention of FIG. 10 also has only two channel-like and successive approximately in one plane arranged pumping chambers 10 may include and may also include more than three such pumping chambers 10.
  • the device 1 of Fig. 10 may also include other drives A of the pumping chambers 10.

Landscapes

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

Abstract

L'invention concerne un dispositif de convoyage de milieux liquides et/ou gazeux, comprenant un ensemble d'au moins deux chambres de pompage dont les volumes changent périodiquement lors du fonctionnement, chaque chambre de pompage présentant au moins une vanne d'alimentation et d'évacuation et toutes les chambres de pompage présentant une alimentation principale commune, cependant qu'aux chambres de pompage est associée au moins une commande qui est configurée de telle façon que les volumes des chambres de pompage changent avec un déphasage de 2p/nombre de chambres. En outre, un dispositif selon l'invention, de convoyage de milieux liquides et/ou gazeux présentant un ensemble d'au moins deux chambres de pompage, dont les volumes changent périodiquement lors du fonctionnement, est caractérisé en ce que les chambres de pompage sont configurées et disposées de telle façon qu'au moins deux chambres de pompage voisines comprennent une paroi commune qui est configurée de manière à permettre un changement de volume desdites chambres de pompage voisines. En outre, l'invention concerne un procédé de convoyage de milieux liquides et/ou gazeux avec utilisation du dispositif précité, le dispositif étant commandé de façon que les volumes des chambres de pompage changent avec un déphasage de 2p/nombre de chambres.
EP07723923A 2006-04-06 2007-04-03 Procédé et dispositif de convoyage automatisé de liquides ou de gaz Withdrawn EP2013477A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006016571A DE102006016571B4 (de) 2006-04-06 2006-04-06 Verfahren und Vorrichtung zum automatisierten Fördern von Flüssigkeiten oder Gasen
PCT/EP2007/002982 WO2007115740A2 (fr) 2006-04-06 2007-04-03 Procédé et dispositif de convoyage automatisé de liquides ou de gaz

Publications (1)

Publication Number Publication Date
EP2013477A2 true EP2013477A2 (fr) 2009-01-14

Family

ID=38477247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07723923A Withdrawn EP2013477A2 (fr) 2006-04-06 2007-04-03 Procédé et dispositif de convoyage automatisé de liquides ou de gaz

Country Status (5)

Country Link
US (1) US20110158822A1 (fr)
EP (1) EP2013477A2 (fr)
JP (1) JP2009532618A (fr)
DE (1) DE102006016571B4 (fr)
WO (1) WO2007115740A2 (fr)

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KR101043219B1 (ko) * 2010-04-05 2011-06-22 한국철강 주식회사 플렉서블 기판 또는 인플렉서블 기판을 포함하는 광기전력 장치의 제조 방법
US8841820B2 (en) * 2011-07-21 2014-09-23 Lockheed Martin Corporation Synthetic jet apparatus
DE102013101029A1 (de) * 2013-02-01 2014-08-07 Emitec Gesellschaft Für Emissionstechnologie Mbh Vorrichtung zur Bereitstellung eines flüssigen Additivs
US10344753B2 (en) * 2014-02-28 2019-07-09 Encite Llc Micro pump systems
WO2018067443A1 (fr) * 2016-10-06 2018-04-12 3M Innovative Properties Company Compositions durcissables et procédés associés
CZ309433B6 (cs) * 2017-07-20 2023-01-11 Ăšstav termomechaniky AV ÄŚR, v. v. i. Způsob a zařízení pro generování syntetizovaného nebo hybridního syntetizovaného proudu tekutiny
CN108302016A (zh) * 2018-03-13 2018-07-20 广州大学 一种连续流体被动阀压电泵

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Also Published As

Publication number Publication date
WO2007115740A3 (fr) 2007-11-29
DE102006016571B4 (de) 2008-09-04
WO2007115740A2 (fr) 2007-10-18
DE102006016571A1 (de) 2007-10-11
US20110158822A1 (en) 2011-06-30
JP2009532618A (ja) 2009-09-10

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