EP3438455A2 - Pompe à membrane et procédé d'actionnement sans contact des membranes d'une pluralité de chambres de travail d'une pompe à membrane - Google Patents

Pompe à membrane et procédé d'actionnement sans contact des membranes d'une pluralité de chambres de travail d'une pompe à membrane Download PDF

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Publication number
EP3438455A2
EP3438455A2 EP18185958.8A EP18185958A EP3438455A2 EP 3438455 A2 EP3438455 A2 EP 3438455A2 EP 18185958 A EP18185958 A EP 18185958A EP 3438455 A2 EP3438455 A2 EP 3438455A2
Authority
EP
European Patent Office
Prior art keywords
membrane
actuator
actuator unit
magnetic
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18185958.8A
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German (de)
English (en)
Other versions
EP3438455A3 (fr
EP3438455B1 (fr
Inventor
Marcus Schwarzer
Heiko Hoffmann
Jan Westerwick
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.)
Schwarzer Precision GmbH and Co KG
Original Assignee
Schwarzer Precision GmbH and Co KG
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
Priority claimed from DE102017128271.8A external-priority patent/DE102017128271A1/de
Application filed by Schwarzer Precision GmbH and Co KG filed Critical Schwarzer Precision GmbH and Co KG
Publication of EP3438455A2 publication Critical patent/EP3438455A2/fr
Publication of EP3438455A3 publication Critical patent/EP3438455A3/fr
Application granted granted Critical
Publication of EP3438455B1 publication Critical patent/EP3438455B1/fr
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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
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric 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
    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/047—Pumps having electric 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/08—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having peristaltic action
    • F04B45/10—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having peristaltic action having plate-like flexible members

Definitions

  • the present invention relates to a diaphragm pump for conveying a gaseous and / or liquid medium, with at least one deformable membrane for changing the size of a working space of the diaphragm pump and with at least one actuator unit for deforming the membrane by contactless loading of the membrane by means of a magnetic field, wherein the Membrane comprises a material and / or consists of a material which is magnetic and / or magnetizable, and the actuator unit comprises at least one magnetic and / or magnetizable actuator means. Between the material of the membrane and the actuator means, a magnetic field is formed, which leads to deformation of the membrane.
  • the present invention relates to a method for non-contact operation of the membranes of several working spaces of a diaphragm pump for conveying a gaseous and / or liquid medium.
  • diaphragm pumps have at least one working space delimited by a membrane which is deformable to alter the size of the working space and by a wall in which at least one inlet and at least one outlet are formed for a medium which in a suction phase via the inlet is sucked into the enlarging working space and ejected in a compression phase through the outlet from the decreasing working space.
  • a controllable actuator or drive unit is provided to deform the membrane.
  • An alternative drive concept comes from the EP 0 604 740 A1 out.
  • the membrane is designed to be magnetically reactive on its side facing away from the working space.
  • the deformation of the membrane via a rotating disc are arranged on the permanent magnets.
  • a magnetic field rotating cyclically about a central axis of the diaphragm acts on the diaphragm, wherein the fluid to be delivered is conveyed in a rotational movement from the inlet to the outlet. It is thus formed a cyclically around the central axis of the membrane rotating working space on the membrane, in which the fluid to be delivered is sucked through an inlet, conveyed around the central axis and finally discharged again via an outlet.
  • a disadvantage of this concept is that the membrane is subjected due to the cyclically rotating magnetic field of a wave-like movement and thus a strong and large-scale deformation, which is associated with a high material wear and a costly maintenance.
  • the rotary conveying movement is comparatively ineffective.
  • Membrane pumps are used inter alia in the field of medical and / or analysis and / or environmental technology, for example in anesthesia devices or gas sensors.
  • diaphragm pumps as precision pumps a compact design is usually required, especially if the diaphragm pumps used are integrated as subassemblies in appropriate medical and / or analytical devices.
  • a high long-term stability of the membrane is indispensable.
  • pulsation-poor operation of the diaphragm pump used is particularly desirable for medical applications and for gas analysis.
  • the term "pulsation" is to be understood in particular a sinusoidal conveying curve, which is due to the periodic change in volume of the working space or deformation of the membrane.
  • the associated pressure pulses or pressure peaks can lead to damage of sensitive sensor devices or falsify the measurement results.
  • the present invention is based on the object, a membrane pump, in particular for use in the field of gas analysis and / or medical technology, to make available, which is characterized by a compact design and a low-wear, low-noise and / or pulsation, especially pulsation-free, operation at the same time allows high flow.
  • the diaphragm pump according to the invention is intended to meet further specific requirements, such as high long-term stability, cost sensitivity and / or valve density.
  • the invention has for its object to provide a method for non-contact operation of the membranes of several working spaces of a diaphragm pump, which allows the construction of a diaphragm pump with the aforementioned advantages.
  • the invention enables an embodiment of the diaphragm pump, which permits a pulsation-poor to largely pulsation-free and / or a low-wear and / or a low-noise operation in a compact design and a low number of parts.
  • a pulsation-poor to largely pulsation-free and / or a low-wear and / or a low-noise operation in a compact design and a low number of parts.
  • less wear points can be realized, which leads to higher service life and reduced maintenance.
  • it is possible to achieve a high delivery rate of, for example, eccentric diaphragm pumps as well as significantly higher end pressures and higher pressure stability, for example, with respect to vane-cell pumps.
  • membrane pump according to the invention can be a sensitivity to moisture and / or particles that is lower, in particular compared to vane pumps, and a high system and valve density which are comparable to those of conventional pumps, in particular with eccentric diaphragm pumps. Furthermore, with the membrane pump according to the invention, in particular compared to vane pumps, lower speeds to achieve a certain discharge pressure or delivery volume possible, which may be associated with a higher engine life and improved controllability of the pump. Finally, by adjusting the magnetic forces an internal pressure or vacuum limit can be realized, whereby a motor or system protection is possible without additional electronic measures.
  • the invention thus proposes alternative or advanced (drive) concepts for deforming at least one membrane compared with the prior art a diaphragm pump by non-contact pressurization of the membrane by means of a magnetic field, which can be realized in particular the advantages described above.
  • the actuator is rotatably mounted and the diaphragm is arranged circumferentially to the actuator unit, wherein in a dead center position of the membrane, the polarization direction of the formed between the material of the membrane and the actuator means magnetic field is aligned radially to the axis of rotation of the actuator , In a dead center position of the membrane, the distance between the actuator means and the membrane preferably reaches an extreme value.
  • the largest attractive or the largest repulsive magnetic force between the actuator means and the membrane material is achieved, wherein the (main) polarization direction of the force acting between the diaphragm and the actuator means magnetic field is aligned substantially transversely or radially to the axis of rotation of the actuator unit ,
  • the term "(main) polarization direction of the magnetic field” means the directional vector between magnetic poles of opposite polarity, which are formed by the membrane material on the one hand and the actuator means on the other hand.
  • the peripheral arrangement of the membrane to the actuator unit allows for a very space-saving design of the diaphragm pump according to the invention.
  • a working space of the diaphragm pump can be arranged within the axial longitudinal dimension of the actuator unit, resulting in an overall very compact construction of the diaphragm pump according to the invention.
  • the term "dead center position of the diaphragm” may include both an “outer dead center position” and an “inner dead center position”.
  • a Totpunk the membrane is achieved when the actuator unit occupies a certain rotational position, in which a magnetic pole of the actuator preferably a magnetic pole of the membrane is directly opposite.
  • the outer dead center is the Distance between the magnetic material of the membrane on the one hand and the actuator means on the other hand minimal. In this case, the membrane is maximally attracted or deformed in the direction of the actuator means. Accordingly, an internal dead center position is to be understood as a state in which the distance between the magnetic material of the diaphragm on the one hand and the actuator means on the other hand is maximum.
  • the membrane is repelled at most by the actuator means or deformed maximally away from the actuator means.
  • the membrane can assume a rest position in which the membrane has no or only a small magnetic force.
  • the (main) polarization direction or the direction vector between poles of opposite polarity extends transversely - ie radially - to the axis of rotation of the actuator unit.
  • the membrane is in a dead center position of the actuator means preferably directly opposite.
  • the actuator means may be held on a radial peripheral surface of the actuator unit and / or at least partially inserted into the actuator unit on the circumference.
  • the actuator means may form at least a part of the peripheral surface of the actuator unit.
  • the surface normal in the central region of a working surface of the membrane can be aligned perpendicular or radial to the axis of rotation of the actuator.
  • each work space is assigned a separate pump head.
  • the work spaces are in particular circumferentially offset to the actuator and in the direction of rotation of the actuator to each other or arranged below. In this way, a compact arrangement of several working spaces is possible, in particular within the axial longitudinal dimension of the actuator unit.
  • the work spaces are preferably uniformly distributed over the circumference of the actuator unit, resulting in a small volume of the pump according to the invention results.
  • the membranes of several working spaces are then subsequently actuated during the rotational movement of a common actuator unit, which leads to a small number of components of the diaphragm pump and simplifies the assembly of the pump as a whole.
  • a pump head of the pump defines together with the membrane a working space and has at least one inlet through which the medium to be pumped is sucked into the working space in a suction phase. In addition, at least one outlet is provided, via which the medium to be delivered is discharged in a pressure phase from the decreasing working space.
  • the actuator unit can have one or more actuator means.
  • Each actuator means may be formed by one or more permanent magnets.
  • a diametrically magnetized ring magnet can be provided as the actuator means.
  • the actuator unit then has in the direction of rotation preferably two opposite magnetic poles, which are polarized opposite.
  • an actuator may also be formed by a group of outwardly polarized permanent magnets. In this case, disk or bar magnets are preferably used.
  • the actuator unit is rotatably mounted and the membrane is arranged on the front side to the particular disc or plate-shaped actuator unit, wherein in a dead center position of the membrane the (main) polarization direction of the formed between the material of the membrane and the actuator means Magnetic field is substantially aligned in the direction of the axis of rotation of the actuator or parallel thereto and wherein a rotational axis of the actuator laterally offset and, preferably, is arranged parallel to a membrane central axis of the membrane, so that the actuator means is cyclically moved upon rotation of the actuator unit on the membrane and cyclically crossing the membrane.
  • the actuator means is moved along a circular path past the membrane.
  • the actuator means in this case covers the area of the central axis of the membrane.
  • the maximum deflection of the membrane in the suction or pressure phase is present in a central region of the membrane surface or in the region of the central axis of the membrane. This allows an effective and gentle pumping operation.
  • each membrane is arranged with respect to its central axis at a distance from the axis of rotation of the actuator unit, so that at least one actuator means is cyclically and subsequently moved past or after each membrane during the rotation of the actuator unit.
  • each membrane is subsequently deflected maximally in the area of its central axis and deformed in the direction of the axis of rotation or parallel to the axis of rotation of the actuator unit.
  • the surface normal in the middle region of a working surface of the membrane is preferably aligned in the direction of the axis of rotation of the actuator unit or parallel thereto.
  • the actuator means is held on an axial end face of the actuator unit and / or at least partially inserted into an axial end face of the actuator unit.
  • the actuator unit is disc-shaped in this embodiment of the invention and has at least one arranged on the front side and / or inserted actuator means.
  • a plurality of actuator means are provided, wherein each actuator means may be formed by a group of disc or bar magnets and the magnets of a group are polarized outwardly the same. In this way, an optimal contactless operation of the membranes is ensured.
  • diaphragms with assigned work spaces may be provided, the work spaces being arranged opposite an axial end face of the actuator unit and opposite the actuator means. In this way, an effective magnetic interaction between the membranes and the actuator unit is achieved.
  • the pump head has at least one collecting space for the parallel merging of the inlets and / or outlets of the working spaces. This allows a structurally simple design and a compact design of the diaphragm pump according to the invention.
  • the actuator unit can also have one or more actuator means in this embodiment.
  • Each actuator means may be formed by one or more permanent magnets.
  • an actuator means is formed by a group of outwardly equal polarized permanent magnets. In this case, disk or bar magnets are preferably used.
  • the actuator unit has a plurality of oppositely polarized outer magnetic poles of the number n acting on the membrane.
  • the actuator unit may comprise a plurality of oppositely polarized magnetic pole groups of the number n, each magnetic pole group consisting only of identically polarized outer magnetic poles, and wherein n is greater than or equal to two.
  • the oppositely polarized magnetic poles or magnetic pole groups are preferably arranged successively in the direction of rotation of the actuator unit, wherein the magnetic poles or magnetic pole groups can be arranged offset in the direction of rotation of the actuator unit by 360 ° / n to one another.
  • the membrane likewise has an outer magnetic pole directed toward the actuator unit or optionally also a group of identically polarized outer magnetic poles. In this way, the membrane can be alternately brought into the outer dead center position and into the inner dead center position upon rotation of the actuator unit.
  • the term "magnetic pole" of the actuator unit is preferably to be understood as meaning a peripheral or frontal outer area of the actuator unit, in whose surroundings the magnetic field strength is particularly high, since the field lines of the magnetic field enter or leave.
  • the directional vector of the magnetic field is formed between the magnetic poles of the actuator unit and the diaphragm.
  • the direction vector can either run radially or transversely or axially in the direction of or parallel to the axis of rotation of the actuator unit.
  • the membranes Aktor In a diaphragm pump with a plurality of working spaces, which are arranged below in the direction of rotation of the actuator unit, the membranes Aktor basically same or form the same magnetic poles. This can be achieved for example by an equal orientation of magnetic means in the membranes.
  • the common actuator unit can thus subsequently arranged membranes of several working spaces subsequently and cyclically bring in the inner or in the outer dead center.
  • a directed suction or pressure flow over interconnected working spaces within the diaphragm pump is ensured.
  • the membranes of two in the direction of rotation of the actuator preferably offset by 180 ° to each other arranged working spaces on the side of the actuator unit uneven or not the same magnetic poles form.
  • the actuator means of the actuator unit and / or the magnetic means of the membrane is a permanent magnet.
  • the actuator means may be, for example, a diametrically magnetized ring magnet. The North Pole is then on one half and the South Pole on the other half of the ring magnet.
  • the ring magnet can be mounted on a magnetic carrier of the actuator means and can be rotatably arranged about a rotational axis extending in the axial direction through the ring magnet.
  • the actuator means may also be a bar magnet or a disc magnet.
  • an actuator means may be formed by a group of rod-shaped or disc-shaped permanent magnets.
  • the actuator unit may have two groups of rod or disk magnets which are arranged offset in the direction of rotation of the actuator unit by preferably 180 ° to one another.
  • the magnets of a group are preferably aligned in the same direction, so that the actuator unit in the region of the group has only magnetic poles of the same name on the membrane side.
  • outer areas of the actuator unit are provided which are weaker or not magnetized at all.
  • the actuator unit at least two, preferably only two, in the direction of rotation of the actuator, in particular at regular intervals offset from one another, further preferably in the direction of rotation of the actuator 180 ° offset from each other arranged non-magnetic outer regions. In this way, arranged in the direction of rotation of the actuator unit magnetic poles or magnetic pole groups - ie magnetic areas - alternate with non-magnetic or only weak magnetic areas.
  • the membrane can be alternately brought into an outer dead center position upon rotation of the actuator unit when an oppositely polarized magnetic pole of the membrane opposite, or in a dead center position when a same polarized magnetic pole of the membrane is opposite.
  • the membrane if a non-magnetic or only slightly magnetic region of the membrane is opposite, then the membrane preferably assumes a rest position which lies between the two dead center positions.
  • a plurality of work spaces may be present, which are arranged either peripherally or frontally to Aktorech.
  • Each workspace is assigned a membrane.
  • the number m of the work spaces is preferably greater than or equal to the number of actuator means of the actuator unit.
  • the working spaces in the direction of rotation of the actuator unit can be arranged offset from each other by 360 ° / m.
  • the magnetic means of all membranes can be aligned in the same direction, so that the membranes on the actuator side have only the same or homopolar oriented magnetic poles.
  • a reverse pole alignment of the magnetic poles of subsequent in the direction of rotation of the actuator unit membranes is possible. This will be discussed in detail below.
  • the polarization of the outer magnetic poles of the actuator unit, on the one hand, and the polarization of the outer magnetic poles of the magnetic media of the diaphragms, on the other hand, and possibly by nonmagnetic or only weakly magnetic regions between the outer magnetic poles of the actuator unit, are particularly preferably intended to ensure that there is no rotational position the Aktoriser the membranes of all working spaces of the pump at the same time at a same inner or outer dead center or all at the same time in a same preferably not deflected position between the dead centers. This allows a very low pulsation operation.
  • the membranes of preferably two working spaces are in a preferably not or only slightly deformed position between the dead centers, which is achieved during a suction phase or pressure phase, then at least the membrane of a third working space in an inner Totpunk ein and be arranged at least the membrane of a fourth working space in an outer dead center.
  • the inner dead center position can mark the beginning of the suction phase and the outer dead center position can mark the beginning of the pressure phase.
  • the number of diaphragms in the rest position corresponds to the total number of diaphragms located in an inner or outer dead center position.
  • the actuator unit may have two oppositely polarized outer magnetic poles or outer magnetic pole groups offset by 180 ° in the direction of rotation, and four working spaces arranged offset by 90 ° in the direction of rotation of the actuator unit may be provided.
  • the membranes of the working spaces preferably have the same polarized outer magnetic poles on a side facing the actuator unit. Characterized it is achieved at a certain rotational position of the actuator, that the membranes of two preferably opposite working spaces in a non or weakly deflected position between the dead centers, while the membrane of a third working space an outer dead center and the membrane of a third preferably opposite the third working space Working space reaches a dead center position. As a result, a pulsation-poor or-free operation of the diaphragm pump is achieved.
  • At least one common collecting inlet space and / or at least one common collecting outlet space can be provided, via which inlets or outlets of the working spaces are fluidically connected to one another.
  • the collecting chambers are in particular designed to merge the inlets or outlets of the respective working spaces in parallel. An external merging of the inlets and outlets of the working spaces outside of the diaphragm pump is therefore not necessary. This allows a simple integration of the diaphragm pump according to the invention in higher-level devices, for example in medical and / or (gas) analysis devices.
  • the membranes of the two opposing working chambers are then attracted either simultaneously to the actuator unit or repelled simultaneously by the actuator unit.
  • n-pairings of working spaces are provided, each pairing having two by 160 ° to 200 °, preferably by 180 °, offset in the direction of rotation of the actuator unit to each other or oppositely arranged working spaces having on the side of the actuator unit oppositely poled to each other membranes.
  • the actuator unit is rotatably mounted and a stator unit is provided for generating a rotating magnetic field, wherein the rotating magnetic field generated by the stator unit is designed for rotational drive of the actuator unit.
  • the stator unit is plate-shaped and / or realized in particular in addition to the embodiments described above.
  • the drive of the actuator via the stator allows a further reduction of the claimed by the diaphragm pump volume, since the stator compared to conventional drive means, such as electric motors, can be designed much smaller volume.
  • the drive of the actuator unit takes place in particular according to the principle of a brushless DC motor.
  • the actuator unit ultimately acts as a rotor which is driven by the rotating magnetic field generated by the stator unit.
  • the stator unit has coils for generating the rotating magnetic field.
  • the coils are driven by a suitable circuit to each other or commutated so that they generate a rotating magnetic field, whereby the actuator unit is pulled in the direction of rotation or driven.
  • a ring-segment-shaped design of the actuator means may be preferred. In this way, in particular an optimal interaction with the stator unit and thus a high efficiency of the diaphragm pump according to the invention is ensured.
  • the actuator means is an integral part of the actuator unit, wherein the geometry of the actuator unit can be supplemented on the periphery and / or front side by the actuator means, for example, to a disc shape.
  • the actuator means can be flush-mounted in an end-side and / or peripheral complementary recess of the actuator unit, in particular glued be. In this way, a compact design can be achieved, wherein an optimal action or interaction between the actuator unit on the one hand and the stator on the other hand is made possible.
  • the actuator means forms a magnetic pole for acting on a membrane on an outer side of the actuator unit facing toward a working space and a preferably oppositely polarized magnetic pole for interacting with the stator unit in the rotating magnetic field on an outer side facing the stator unit.
  • the actuator unit may preferably have magnetic poles of preferably opposite polarity on two opposite end faces in the direction of the rotation axis, whereby two functions are fulfilled: On the one hand, the actuator unit interacts with the rotating magnetic field via the one end face, whereby the rotary drive of the actuator unit is realized. At the same time, on the other hand, the magnetic effect is converted to the at least one membrane via the opposite end face, whereby the pumping or suction effect is ensured.
  • the distance between the actuator means and the magnetic means of the membrane in particular axially, be adjustable, which is particularly in such embodiments
  • the invention can be realized in a simple manner, in which actuator unit and working space or membrane are arranged in the direction of the axis of rotation of the actuator unit or axially one behind the other.
  • This aspect of the invention has its own inventive significance.
  • the working space is spatially provided between the membrane and the actuator means.
  • the working space is bounded on one side by the membrane, on the other side by a housing part of the pump.
  • a direct contact between the membrane and the actuator means is prevented in each dead center position of the membrane.
  • the membrane directly adjoins the actuator means in an outer dead center position of the membrane, the membrane and the actuator means may come into contact, which is associated with unwanted and cyclically recurring noises.
  • the inventive arrangement of the working space between the membrane and the actuator means this problem is overcome and ensures quiet operation.
  • the housing part may adjacent to the actuator means have a smaller wall thickness and / or consists of a material such that a non-contact deformation of the membrane by means of the formed between the membrane and the actuator means magnetic field through the housing part is possible. It is expedient if the magnetic field is only slightly influenced by the housing part, so that a deformation of the membrane by contactless application by means of the magnetic field is possible.
  • the membranes of at least two, preferably four, working spaces are deformed contactless by applying a magnetic field, wherein the magnetic field between the membranes and at least one magnetic and / or magnetizable actuator means of a rotatable actuator unit is formed and wherein in the direction of rotation of the actuator unit sequentially arranged membranes are deformed contactless by magnetic interaction with the actuator means.
  • FIGS. 1 and 2 show a diaphragm pump 1 for conveying a (not shown) gaseous and / or liquid medium.
  • the diaphragm pump 1 has a plurality of deformable diaphragms 2, in the illustrated embodiment, for varying the size of four working spaces 3 of the diaphragm pump 1.
  • a pumping process consists of a suction phase and a pressure phase, wherein in the suction phase, the medium is sucked into a magnifying working space 3 and ejected in a compression phase or pressure phase from a decreasing working space 3 again.
  • the membranes 2 are at least partially, in particular elastically deformable, designed to increase or decrease the size of the working space 3.
  • the diaphragm pump 1 has an actuator unit 4 which is rotatably supported or driven (cf. Fig. 2 ).
  • a drive device 5 preferably an electric motor, is provided to drive the actuator 4.
  • the deformation of the membranes 2 is effected by contactless application by means of magnetic fields, wherein the membranes 2 comprise a material or consist of a material which is magnetic and / or magnetizable.
  • each membrane 2 has a permanent magnet as the magnet means 6, which is embedded or received in a central region of the membrane 2.
  • the magnet means 6 of all membranes 2 are preferably aligned in the same pole to the actuator unit 4.
  • the actuator unit 4 has only one actuator means 7, which is designed as a diametrically magnetized ring magnet with two oppositely polarized magnetic poles.
  • the actuator unit 4 has a receptacle area 4 a which surrounds the circumference and into which the actuator means 7 is received and held.
  • the actuator unit 4 may in particular be designed in several parts, in order to enable the sliding of the actuator means 7 on the receiving area 4a.
  • the actuator unit 4 consists of two components which can be screwed together or inserted into one another, each having a radial projection, between which the actuator means 7 is held axially in the receiving region 4a.
  • other constructive solutions are possible.
  • a radially directed to a rotational axis 8 of the actuator unit 4 (not shown) magnetic field is formed to deform the membranes 2 without contact.
  • the actuator unit 4 is in the in Fig. 2 Shaped embodiment illustrated sleeve or wavy.
  • the two outer magnetic poles of the actuator means 7 are arranged offset in the direction of rotation of the actuator 4 by 180 ° to each other and arranged the four working spaces 3 in the direction of rotation of the actuator 4 by 90 ° to each other.
  • the membranes 2 are arranged with the associated working spaces 3 within the longitudinal dimension of the actuator unit 4.
  • a rotational position of the actuator unit 4 is shown, in which the membranes 2 are deformed simultaneously by two opposing working spaces 3 due to the magnetic field.
  • the membrane 2 of a first in Fig. 2 shown upper working space 3 repelled by the south pole S of the actuator means or ring magnet and urged into an inner dead center position (not shown)
  • the membrane 2 of a second in Fig. 2 shown lower working space 3 is attracted by the north pole N of the ring magnet or actuator means 7 and urged into an outer dead center position (not shown).
  • the magnetically repelled membrane 2 and the magnetically attracted membrane 2 are arranged offset in the direction of rotation of the actuator 4 by 180 ° to each other.
  • the membranes 2 of the other two working spaces 3 are subjected in this rotational position of the actuator 4 at most a small magnetic interaction with the actuator means 7 and are in an undeformed rest position. This is due to the fact that the magnetic means 6 of these membranes 2 in the rotational position shown ranges (see. Fig. 4 , Areas 7c) of the actuator 4 are opposite, which are not or only slightly magnetically formed. Accordingly, no or only a small magnetic interaction between the magnetic means 6 and these areas of the actuator unit 4 takes place.
  • the membranes 2 of the rotational direction of the actuator 4 subsequently arranged working spaces 3 by the moving magnetic poles of the actuator 4 is operated without contact.
  • the membranes 2 all working spaces 3 at the same time at a same inner or outer dead center or all at the same time in a same non or weakly deflected position between the dead centers.
  • the membrane 2 of a first working space 3 in a dead center position only the membrane 2 of a second working space 3 in an outer dead center and the membranes 2 other working spaces 3 may not or only in a preferably are located slightly deformed position between the dead centers, which is achieved during a suction phase or pressure phase.
  • the course of movement of the membranes 2 can be described as a sinusoidal curve, wherein the course of movement of the membranes 2 of the four working spaces 3 is to be described by sinusoids staggered relative to each other and wherein the motion profiles of the membranes 2 overlap.
  • the cycle of membrane movement can thus be ideally represented as a sinusoid.
  • a separate pump head 9 is provided for each membrane 2.
  • the pump heads 9 are correspondingly arranged offset in the direction of rotation of the actuator 4 by 90 ° to each other.
  • the pump heads 9 each have an inner housing part 10 and an outer housing part 11.
  • a chamber wall 12 is formed, through which the corresponding working space 3 is limited on the upper side.
  • the diaphragm pump 1 has an actuator housing 13 for receiving the actuator unit 4.
  • the pump heads 9 are screwed to the actuator housing 13, wherein the membranes 2 can be clamped sealingly at their edge regions between the actuator housing 13 on the one hand and the pump heads 9 on the other hand.
  • Each pump head 9 can valves (see. Fig. 5 ), preferably non-return valves, in order to prevent the medium from being discharged from an inlet in the pressure phase and being sucked in through an outlet in the suction phase (cf. Fig. 4 , Inlet 17, outlet 18).
  • the drive device 5 is also screwed to the actuator housing 13.
  • the drive device 5 has a flange plate 14.
  • the actuator 4 is rotatably mounted on a drive pin 15 of the drive device 5.
  • each chamber wall 12 at least one inlet and at least one outlet are arranged (see. Fig. 4 , Inlet 17, outlet 18).
  • the medium is sucked in the suction phase via the inlet into the working space 3 and ejected in the pressure phase via the outlet from the working space 3 again.
  • the medium to be pumped is sucked into the membrane pump 1 via a suction line 19. Via the suction line 19, the medium is guided into a collecting inlet space 20, the medium being supplied from the collecting inlet space 20 to the inlets of the respective working spaces 3.
  • a Sammelauslassraum 21 is provided, in which the medium discharged from the work chambers 3 via the outlets is collected collected before it leaves the membrane pump 1 via a pressure line 22.
  • the collecting inlet space 20 and the collecting outlet space 21 are arranged on the front side to the actuator unit 4 and opposite to the drive device 5.
  • the collecting inlet space 20 and the collecting outlet space 21 are formed by a preferably multi-part collecting housing 23, wherein a separate housing part is provided for each collecting space 20, 21.
  • the collecting housing 23 is screwed to the actuator housing 13.
  • the drive device 5, the actuator housing 13 and the collecting housing 23 are in the direction of the axis of rotation 8 of the actuator 4 in a row, so that there is a compact design.
  • FIGS. 3 to 11 Alternative embodiments of diaphragm pumps 1 are shown. Functionally identical components of the diaphragm pumps 1 shown are identified by the same reference numerals.
  • a drive device 5 an actuator housing 13 and a pump head 9 of this embodiment are arranged axially one behind the other in the direction of the axis of rotation 8 of an actuator unit 4 and screwed together.
  • the pump head 9, the actuator housing 13 and the flange plate 14 have an identical outer contour. In particular, no components are provided, apart from fluid and / or electrical connections, which protrude beyond this outer contour. This allows a compact and in particular flat construction of the diaphragm pump 1.
  • the actuator unit 4 is formed in this embodiment as a rotating disk or plate-shaped, wherein the actuator housing 13 has a corresponding disc-shaped recess 24, in which the actuator unit 4 is received (see. Fig. 4 ).
  • a common pump head 9 is provided for all four working spaces 3.
  • the pump head 9 has a cover 25 which has the suction line 19 and the pressure line 22 (see. Fig. 3 ).
  • the pump head 9 has an inner housing part 10 and an outer housing part 11.
  • Each working space 3 is bounded by a chamber wall 12 of the inner housing part 10 and a membrane 2.
  • Each membrane 2 has a magnetic means 6.
  • the actuator 4 has according to Fig. 4 two end-mounted actuator means 7, which are each formed by a group of outwardly equal polarized permanent magnets 7a, 7b.
  • the actuator means 7 or the group-wise arranged permanent magnets 7a, 7b are arranged offset in the direction of rotation of the actuator 4 by 180 ° to each other.
  • areas 7c are provided between the permanent magnets 7a, 7b which are not or at most weakly magnetically formed.
  • the actuator unit 4 has, moreover, on its end face facing the drive device 5, a corresponding to a drive pin 15 of the drive means 5 Bore 26 on.
  • the actuator 4 is rotatably connected to the drive pin 15.
  • a circular recess 27 for receiving a circular projection 16 of the drive device 5 is provided on this end face of the actuator 4. In this way, a secure mounting of the actuator 4 is ensured.
  • a collecting inlet space 20 and a collecting outlet 21 is formed by the outer housing part 11 of the pump head 9.
  • the collecting chambers 20, 21 are closed on the upper side by the cover 25 of the pump head 9.
  • the pump head 9 has (only schematically indicated) valves 28, in particular check valves on. This prevents that the medium is discharged from an inlet 17 in the pressure phase and is sucked in through an outlet 18 in the suction phase.
  • the valves 28 are preferably arranged between the inner housing part 10 and the outer housing part 11.
  • the membranes 2 are arranged with the associated working spaces 3 (directly) opposite to an end face of the actuator unit 4.
  • the membranes 2 are arranged substantially in a common plane. It is in Fig. 5 a rotational position of the actuator unit 4 shown, in which the membranes 2 are deformed by two 180 ° in the direction of rotation of the actuator unit 4 offset from each other working spaces 3 due to the present magnetic field simultaneously.
  • the central axes M of the membranes 2 extend laterally offset from the axis of rotation 8 of the actuator unit 4.
  • the magnet means 6 of the membranes 2 are arranged centrally in the region of the membrane axis M.
  • the actuator means 7 of the actuator 4 are moved on a circular path on the magnetic means 6 of the membranes 2, which leads to the cyclical deflection of the membranes 2.
  • Fig. 5 is the membrane 2 of a first in Fig. 5 3 shown by the south pole of a permanent magnet 7 a of the first actuator means 7 and pushed into an inner dead center position (not shown), while the membrane of a second in Fig. 5 Workspace 3 shown on the right is attracted by the north pole of a permanent magnet 7b of the second actuator means 7 and urged into an outer dead center position (not shown).
  • the membranes 2 of the other two working spaces 3 are subjected in this rotational position of the actuator 4 at most a small magnetic interaction, since they are in the illustrated rotational position of the actuator 4 opposite to not or at most weak magnetic trained areas 7c are arranged.
  • the magnet means 6 of two in the direction of rotation of the actuator unit 4 offset by 180 ° to each other or opposite membranes 2 can deviate from that on the actuator side Fig. 5 also be polar opposite to each other or form unlike magnetic poles.
  • the magnetic means 6 are arranged so that the membrane 2 of a working space 3 on the side of the actuator unit 4 (outside) has a south pole and the membrane 2 of the opposite working space 3 on the side of the actuator 4 has a north pole.
  • FIGS. 6 and 7 another, alternative embodiment of a diaphragm pump described.
  • a pump head is provided which forms four working spaces together with four clamped between the pump head and an actuator housing 13 membranes 2.
  • the design of the pump head can in the FIGS. 3 to 5 shown embodiment correspond.
  • a drive device 5 is provided for an actuator unit 4, which is formed as a plate-shaped stator unit 29 with a plurality of coils 30.
  • the coils 30 are preferably arranged concentrically and at regular intervals in the stator unit 29 in the direction of rotation of the actuator unit 4 to each other.
  • the diaphragm pump 1 has a (not shown) control electronics, which is designed to control the polarity change of the coils 30.
  • the rotational position of the actuator unit 4 is preferably detected, wherein, as a function of this rotational position, the polarity reversal of the coils 30 to generate a magnetic rotating field.
  • the drive or the rotation of the actuator unit 4 then takes place on the basis of the magnetic rotating field generated by the coils 30.
  • the stator unit 29 is preferably designed for pivotal mounting of the actuator unit 4.
  • a preferably centrally arranged bearing bore 31 is provided.
  • the actuator unit 4 has a centrally arranged bearing journal 32, which in particular can be inserted into the bearing bore 31 with a precise fit.
  • the stator unit 29 is connected to an actuator housing 13.
  • two actuator means 7 are provided in the illustrated embodiment, which are each formed as a circular ring segment-shaped permanent magnet with axial magnetization.
  • the actuator means 7 are arranged offset in the direction of rotation of the actuator 4 by 180 ° to each other and preferably extend over 90 ° in the direction of rotation of the actuator 4. In this way, an effective magnetic interaction with the stator 29 and a high efficiency of the diaphragm pump 1 is possible.
  • the actuator means 7 are an integral part of the actuator 4 and complement these peripherally and frontally to a disc shape, as particularly clear Fig. 6 evident.
  • the actuator means 7 each form on a side remote from the drive unit 5 end face of the actuator 4 a magnetic N, S to act on an opposite membrane 2 and on the other end of the actuator 4, an oppositely polarized magnetic pole S, N for interacting with the stator 29th Regarding Fig. 7 it is also in this embodiment so that the membranes 2 are arranged frontally opposite to the actuator unit 4 and lying substantially in a common plane.
  • Fig. 7 In order to enable a pulsation-poor operation of the diaphragm pump 1, is in an in Fig. 7 shown certain rotational position of the actuator unit 4 in Fig. 7 membrane 2 arranged on the left of a working space attracted by the north pole N of the first circle-shaped actuator means 7 and urged into an outer dead center position (not shown), while the right-hand membrane 2 of a working space repelled by the south pole S of the second circular-segment-shaped actuator means 7 and in an inner dead center position is urged (not shown).
  • the magnetically repelled membrane 2 and the magnetically attracted membrane 2 are arranged offset in the specific rotational position of the actuator unit by 180 ° to each other.
  • the membranes 2 of two other work spaces are in the particular rotational position corresponding to not or at most weakly magnetized areas assigned to 7c and are thus in a non-deformed position between the Tot Vietnamese einen. Analogous to the previous embodiments are at no time, that is at no rotational position of the actuator 4, the membranes 2 all work spaces simultaneously in the same inner or outer dead center or in a same, preferably not or weakly deflected position between the dead center.
  • the actuator 4 It is located in the specific rotational position of the actuator 4, preferably only the membrane 2 of a working space in the inner dead center, only the membrane 2 of a second working space in the outer dead center and the membranes 2 of two other working spaces may be in a preferably not or only weak deformed position, which is achieved during a suction phase or pressure phase and lies between the dead center positions. In this way, corresponding advantages can be realized.
  • a drive device for driving an actuator 4 is not shown.
  • the drive device may be formed according to the embodiments described above as an electric motor or as a brushless DC motor.
  • the actuator housing 13, the inner housing part 10 and the outer housing part 11 are with respect to a rotational axis 8 of the actuator unit 4 (FIG. Fig. 9 ) axially arranged one behind the other and screwed together.
  • the drive device is preferably fastened to the actuator housing 13.
  • the actuator housing 13 corresponding connecting means, in particular threaded and / or receiving bores, on (schematically in FIG Fig. 8 indicated).
  • the actuator housing 13 has a through hole 13a, through which a drive pin of the drive device for driving the actuator unit 4 can be passed.
  • the actuator housing 13, the inner housing part 10 and the outer housing part 11 have an approximately complementary and matching, in particular rectangular or square, outer contour.
  • each pump head 9 is disposed on an outer side of the housing of the diaphragm pump 1 and are attached.
  • Each pump head 9 has a suction line 19 and a pressure line 22, wherein the fluid to be delivered is sucked into the pump head 9 via the suction line 19 and conveyed out of the pump head 9 via the pressure line 22.
  • the membranes 2 are peripherally clamped between the inner housing part 10 and the outer housing part 11 (cf. Fig. 9 ).
  • the actuator unit 4 is formed as a rotating disk.
  • each membrane 2 has, for example, a magnetic means 6 designed as a permanent magnet.
  • Each working space 3 is delimited by a chamber wall 12 on the one hand and the membrane 2 on the other hand, the chamber wall 12 being formed by a region of the inner housing part 10.
  • the actuator unit 4 has actuator means 7 which are designed as group-wise arranged permanent magnets 7a, 7b (corresponding to Fig. 4 ).
  • the unequal magnetic poles or magnetic pole groups formed on the diaphragm side by the permanent magnets 7a, 7b are arranged offset by 180 ° in the direction of rotation of the actuator unit 4. In circumferential or rotational direction of the actuator 4 are between the permanent magnets 7a, 7b as in in Fig. 4 shown embodiment areas provided that are not or at most weakly magnetic.
  • the working spaces 3 are arranged between the membranes 2 and the permanent magnets 7a, 7b of the actuator unit 4. Structurally, the membranes 2 are separated from the actuator unit 4 and thus from the actuator means 7 via the chamber walls 12 of the inner housing part 10.
  • the inner housing part 10 consists, at least in the region of the chamber walls 12, of a material, for example a plastic material, which does not oppose the magnetic coupling between the actuator means 7 and the magnetic means 6 of the membranes 2 and permits non-contact deformation of the membranes 2 by the actuator means 7.
  • the membranes 2 may have a round, preferably circular, outer contour in all embodiments shown and described.
  • the preferably cylindrical magnet means 6 are arranged and held in particular in a middle region of the membranes 2 or in the region of the center axes M.
  • the magnet means 6 can be arranged on a side of the membranes 2 facing away from the working space 3.
  • the membranes 2 may be formed thickened in their central regions relative to their edge regions, wherein formed in the membranes 2 recesses or receiving areas for the magnetic means 6 could be.
  • the attachment of the magnetic means 6 to the membranes 2 is then carried out by inserting the magnetic means 6 in the receiving areas and possibly by gluing.
  • the embodiment shown is advantageous in that a contact between the actuator means 7 of the actuator unit 4 and the magnetic means 6 of the membranes 2 is securely excluded during operation of the diaphragm pump 1. This leads to a significant reduction of noise during operation of the diaphragm pump. 1
  • the membranes 2 are preferably thin-walled in their edge regions in order to allow simple deformability.
  • the membranes 2 are deformed in the pumping operation exclusively in their edge regions, whereas the central regions - reinforced by the rigid magnetic means 6 - remain substantially dimensionally stable.
  • the pump heads 9 are laterally connected to the work spaces 3 (see. Fig. 10 ).
  • Each pump head 9 has a base plate 33 and a head part 34.
  • the suction line 19 and the pressure line 22 are formed by the head part 34.
  • the base plate 33 is arranged on the actuator housing 13 and on the outer housing part 11, in particular screwed. Between the base plate 33 and the head part 34 valves 28 in the form of an inlet valve 35 and an outlet valve 36 are provided (see. Fig. 11 ).
  • the fluid to be delivered is sucked in the suction phase via the suction line 19 of a pump head 9. After passing through the inlet valve 35, the fluid passes through the inner housing part 10 into the working space 3. In the pressure phase, the fluid is also expelled from the working space 3 via the inner housing part 10.
  • the actuator unit 4 has a plurality of subsequently arranged, preferably cylindrical, recesses 37 in the direction of rotation, in which the magnets 7a, 7b are inserted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP18185958.8A 2017-08-01 2018-07-27 Pompe à membrane et procédé d'actionnement sans contact des membranes d'une pluralité de chambres de travail d'une pompe à membrane Active EP3438455B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017007170 2017-08-01
DE102017128271.8A DE102017128271A1 (de) 2017-08-01 2017-11-29 Membranpumpe und Verfahren zur berührungslosen Betätigung der Membranen von mehreren Arbeitsräumen einer Membranpumpe

Publications (3)

Publication Number Publication Date
EP3438455A2 true EP3438455A2 (fr) 2019-02-06
EP3438455A3 EP3438455A3 (fr) 2019-04-17
EP3438455B1 EP3438455B1 (fr) 2021-05-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021133287A1 (de) 2021-12-15 2023-06-15 Faurecia Autositze Gmbh Verfahren zur Manipulation eines Fluidaktuators sowie Funktionseinrichtung zur Durchführung des Verfahrens
WO2023124724A1 (fr) * 2021-12-31 2023-07-06 广东美的白色家电技术创新中心有限公司 Pompe à membrane et purificateur d'eau

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1184447B (de) 1963-04-18 1964-12-31 Erich Becker Membran-Pumpe
EP0604740A1 (fr) 1992-12-31 1994-07-06 KNF Neuberger GmbH Pompe à membrane

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528971A1 (de) * 1966-05-05 1969-07-17 Beck Kg Walter Ventillose Verdraengungspumpe
DE4118628A1 (de) * 1991-06-06 1992-12-10 Wilhelm Sauer Gmbh & Co Kg Elektrische membranpumpe
DE102009037845A1 (de) * 2009-08-18 2011-04-14 Fresenius Medical Care Deutschland Gmbh Einwegelement, System zum Pumpen sowie Verfahren zum Pumpen einer Flüssigkeit
DE102013000765B4 (de) * 2013-01-18 2014-09-11 Schwarzer Precision GmbH & Co. KG Membranpumpe
EP3135909B1 (fr) * 2015-08-24 2020-11-04 Pfeiffer Vacuum Gmbh Pompe sous vide a membrane

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1184447B (de) 1963-04-18 1964-12-31 Erich Becker Membran-Pumpe
EP0604740A1 (fr) 1992-12-31 1994-07-06 KNF Neuberger GmbH Pompe à membrane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021133287A1 (de) 2021-12-15 2023-06-15 Faurecia Autositze Gmbh Verfahren zur Manipulation eines Fluidaktuators sowie Funktionseinrichtung zur Durchführung des Verfahrens
WO2023124724A1 (fr) * 2021-12-31 2023-07-06 广东美的白色家电技术创新中心有限公司 Pompe à membrane et purificateur d'eau

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EP3438455A3 (fr) 2019-04-17
EP3438455B1 (fr) 2021-05-12

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