EP2918835B2 - Diaphragm pump - Google Patents

Diaphragm pump Download PDF

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Publication number
EP2918835B2
EP2918835B2 EP15151943.6A EP15151943A EP2918835B2 EP 2918835 B2 EP2918835 B2 EP 2918835B2 EP 15151943 A EP15151943 A EP 15151943A EP 2918835 B2 EP2918835 B2 EP 2918835B2
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EP
European Patent Office
Prior art keywords
diaphragm
diaphragm pump
inlet valve
section
outlet valve
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EP15151943.6A
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German (de)
French (fr)
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EP2918835B1 (en
EP2918835A1 (en
Inventor
Thorsten Burggraf
Jürgen Wissner
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Pfeiffer Vacuum GmbH
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Pfeiffer Vacuum GmbH
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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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/08—Actuation of distribution 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
    • F04B43/0009—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
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/028—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms with in- or outlet valve arranged in the plate-like flexible member
    • 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

Definitions

  • the present invention relates to a diaphragm vacuum pump, with a scoop chamber which can be acted upon by a diaphragm and an inlet valve and an outlet valve via which a medium is sucked into the scoop chamber in a suction phase and is expelled from the scoop chamber in a compression phase, the inlet valve, the outlet valve and the Membrane are integrated in a single connected component,
  • Diaphragm pumps are therefore dry positive displacement pumps.
  • the scoop is acted upon via the membrane in such a way that in a suction phase the medium in question is sucked through the inlet valve into the scoop and in a compression phase is expelled again from the scoop via the outlet valve.
  • a dead volume remains, the content of which is not expelled. During the subsequent suction stroke, this volume expands again and partially fills up the work space, which limits the ultimate pressure that can be achieved.
  • a compression ratio that is higher than the ratio between the maximum working volume and the dead volume cannot be achieved with a positive displacement vacuum pump.
  • the pumping speed of such a diaphragm pump is a function of the size of the pumping chamber, the speed and the dead volume.
  • the previously known diaphragm pumps are clearly inferior to the so-called scroll pumps, which also belong to the type of positive displacement vacuum pumps.
  • the invention is therefore based on the object of specifying an improved diaphragm pump of the type mentioned at the outset, with which a lower final pressure can be achieved with a construction which is kept as simple as possible, the maintenance effort is minimized and the production costs are reduced.
  • the pumping speed of the pump should also be increased.
  • the section comprising the inlet valve and / or the section of the connected component comprising the outlet valve can each be positively controlled via an actuator.
  • the individual connected component can be designed as a membrane as a whole, which comprises a membrane section assigned to the pumping chamber, which corresponds to the membrane of a conventional membrane pump, and a membrane section for each valve, which forms the valve membrane of a membrane valve.
  • the movement of the inlet valve and / or the outlet valve is positively controlled by the drive. This is a particularly effective measure to reduce backflow.
  • the section comprising the inlet valve and / or the section of the connected component comprising the outlet valve can each be positively controlled via an actuator.
  • the delivery rate and the final pressure of the diaphragm pump can be greatly influenced by the type of control, in particular by the selection of control times and / or - if control cams are provided - by the shape of the control cams:
  • the Cross-section of an intake duct can be changed in a targeted manner, which has a direct effect on the pumping speed of the diaphragm pump.
  • At least the section of the connected component comprising the membrane can be acted upon by a crank mechanism.
  • the integration of the inlet valve and the outlet valve in an individual continuous component that also includes the membrane also has the particular advantage that the valve control can be moved into the area of the crank mechanism of the membrane pump, which can simplify the overall structure of the pump.
  • At least one actuator is thus coupled to the crank mechanism of the diaphragm pump or encompassed by it.
  • the crank mechanism of the diaphragm pump comprises a connecting rod which is arranged between an eccentric shaft and a piston element which acts on the connected component.
  • the connecting rod is coupled via a crosshead to the piston element which acts on the connected component.
  • At least one actuator comprises an electrically controllable exciter, for example an electromagnet, a piezo element or the like.
  • the section comprising the inlet valve and / or the section comprising the outlet valve of the individual connected component can be acted upon by the respective actuator against a spring force. After actuation by a respective actuator, the respective valve can then be automatically reset by the spring force.
  • a respective actuator can in particular be controllable without contact, for example via a light barrier, a magnetic coil or the like.
  • Fig. 1 shows a schematic partial representation of an exemplary embodiment of a diaphragm pump 10 according to the invention, which can in particular be a diaphragm vacuum pump.
  • the membrane pump 10 comprises a scoop chamber 14 which can be acted upon by a membrane 12 and an inlet valve 16 and an outlet valve 18, via which a medium 20 is sucked into the scoop chamber 14 in a suction phase and is expelled from the scoop chamber 14 in a compression phase.
  • the inlet valve 16, the outlet valve 18 and the membrane 12 are integrated in a single coherent component 22 in the form of a common membrane.
  • the section comprising the inlet valve 16 and the section of the component 22 comprising the outlet valve 18 are each positively controlled via an actuator 24.
  • At least the section of the component 22 comprising the membrane 12 can be acted upon by a crank mechanism 26.
  • the actuators 24 are coupled to this crank mechanism 26.
  • the actuators 24 each comprise a swivel arm 28 which is rotatably supported at one end about a swivel axis 30 and with its other end on a cam 32 (cf. also Fig. 2 ) of the crank mechanism 26, and a plunger 34 extending in the vertical direction, which can be acted upon by the swivel arm 28 and can be pressed in the vertical direction against the section comprising the inlet valve 16 or the section comprising the individual valve 22 comprising the outlet valve 18.
  • both the section comprising the inlet valve 16 and the section of the component 22 comprising the outlet valve 18 can each be acted upon by the respective actuator 24 against the force of a compression spring 36. After actuation of the intake valve 16 or exhaust valve 18 by the relevant actuator 24, this valve is reset by the associated compression spring 36.
  • the crank mechanism 26 comprises a connecting rod 38 which is arranged between an eccentric shaft 40 and a piston element 42 which acts on the individual connected component 22.
  • the common membrane 22 is clamped between a head cover 44 and the housing 46 of the membrane pump 10.
  • Fig. 2 shows a schematic side view of the connecting rod 38 ( Fig. 1 ) coupled eccentric shaft 40 and the cams 32 of the crank mechanism 26, which are arranged and designed with respect to the eccentric shaft 40 in such a way that the valves 16, 18 are controlled in accordance with the pumping rhythm controlled by the movement of the connecting rod 38 and thus by the rotating eccentric shaft 40 will.
  • Fig. 3 is a top view of the component 22 of the diaphragm pump 10 which comprises the inlet valve 16, the outlet valve 18 and the diaphragm 12. How Fig. 3 shows, the component 22 in the region of the valves 16, 18 each comprises a corresponding sealing surface.
  • Fig. 4 shows a schematic partial representation of a further exemplary embodiment of a diaphragm pump 10 according to the invention, which differs from that in FIG the Fig. 1 reproduced embodiment essentially differs in that a respective actuator 24 in the present case comprises a two-armed lever rotatably mounted about an axis 48.
  • the lever abuts the eccentric shaft 40 of the crank mechanism 26 with a generally vertically extending portion 24 'and is provided with a generally vertically upwardly extending extension 24 "' at the free end of a generally horizontally extending portion 24".
  • the inlet valve 16 or the outlet valve 18 can be acted upon accordingly via the attachment 24 ′ ′′.
  • this diaphragm pump 10 has at least essentially the same structure as that of FIG Fig. 1 , corresponding parts being assigned the same reference numerals.
  • the connecting rod 38 (cf. Fig. 1 ) of the crank mechanism 26 of a respective diaphragm pump 10 is via a crosshead 50 (cf. Fig. 6 ) coupled to the piston element 42 acting on the component 22.
  • Fig. 5 shows a schematic representation of a piston drive without a crosshead.
  • the connecting rod 38 is connected directly to the piston element 42 via a piston pin 52.
  • FIG. 6 an exemplary embodiment of a piston drive with crosshead 50 is shown in a schematic representation.
  • the connecting rod 38 is coupled via a crosshead 50 to the piston element 42 which acts on the individual connected component 22.
  • the piston rod 54 is rigidly connected to the bottom of the piston element 42 and a pivot bearing 56 of the crosshead 50.
  • the pivot bearing 56 is arranged on a sliding shoe 58 of the crosshead, which is displaceable along a sliding bearing wall 60. In such a crosshead arrangement, the piston element 42 is kept free from transverse forces.
  • the actuators 24 can also each comprise an electromagnet, a piezo element or another electrically controllable exciter.
  • a respective actuator 24 can be controlled, for example, via a light barrier, a magnetic coil or in some other way without contact, in particular by a crank mechanism.

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

Description

Die vorliegende Erfindung betrifft eine Membranvakuumpumpe, mit einem über eine Membran beaufschlagbaren Schöpfraum und einem Einlassventil sowie einem Auslassventil, über die ein Medium in einer Saugphase in den Schöpfraum gesaugt und in einer Kompressionsphase aus dem Schöpfraum ausgestoßen wird, wobei das Einlassventil, das Auslassventil und die Membran in einem einzelnen zusammenhängenden Bauteil integriert sind,The present invention relates to a diaphragm vacuum pump, with a scoop chamber which can be acted upon by a diaphragm and an inlet valve and an outlet valve via which a medium is sucked into the scoop chamber in a suction phase and is expelled from the scoop chamber in a compression phase, the inlet valve, the outlet valve and the Membrane are integrated in a single connected component,

Bei einer derartigen Membranpumpe ist der Schöpfraum durch die Membran zum Antrieb hin hermetisch abgedichtet, so dass weder das geförderte Medium durch Öl verunreinigt werden kann noch aggressive Medien die Mechanik angreifen können. Membranpumpen sind deshalb trockene Verdrängerpumpen. Über die Membran wird der Schöpfraum so beaufschlagt, dass in einer Saugphase das betreffende Medium durch das Einlassventil hindurch in den Schöpfraum gesaugt und in einer Kompressionsphase über das Auslassventil wieder aus dem Schöpfraum ausgestoßen wird. Am oberen Umkehrpunkt der Membran verbleibt ein Totvolumen, dessen Inhalt nicht ausgestoßen wird. Während des darauffolgenden Saughubes expandiert dieses Volumen erneut und füllt den Arbeitsraum teilweise auf, wodurch der erreichbare Enddruck begrenzt wird.In such a diaphragm pump, the pumping chamber is hermetically sealed by the diaphragm to the drive, so that neither the pumped medium can be contaminated by oil nor aggressive media can attack the mechanics. Diaphragm pumps are therefore dry positive displacement pumps. The scoop is acted upon via the membrane in such a way that in a suction phase the medium in question is sucked through the inlet valve into the scoop and in a compression phase is expelled again from the scoop via the outlet valve. At the top reversal point of the membrane, a dead volume remains, the content of which is not expelled. During the subsequent suction stroke, this volume expands again and partially fills up the work space, which limits the ultimate pressure that can be achieved.

Mit einer Verdränger-Vakuumpumpe kann kein Verdichtungsverhältnis erzielt werden, das höher ist als das Verhältnis zwischen dem maximalen Arbeitsvolumen und dem Totvolumen. Das Saugvermögen einer solchen Membranpumpe ist eine Funktion der Größe des Schöpfraums, der Drehzahl sowie des Totvolumens. Insbesondere im Ansaugdruckbereich von 1 bis 10 mbar sind die bisher bekannten Membranpumpen den sogenannten Scroll-Pumpen, die ebenfalls zur Gattung der Verdränger-Vakuumpumpen gehören, deutlich unterlegen.A compression ratio that is higher than the ratio between the maximum working volume and the dead volume cannot be achieved with a positive displacement vacuum pump. The pumping speed of such a diaphragm pump is a function of the size of the pumping chamber, the speed and the dead volume. In the suction pressure range of 1 to 10 mbar in particular, the previously known diaphragm pumps are clearly inferior to the so-called scroll pumps, which also belong to the type of positive displacement vacuum pumps.

Aus DE 297 23 455 U1 ist eine Membranpumpe der eingangs genannten Art bekannt.Out DE 297 23 455 U1 a diaphragm pump of the type mentioned is known.

Der Erfindung liegt somit die Aufgabe zugrunde, eine verbesserte Membranpumpe der eingangs genannten Art anzugeben, mit der bei möglichst einfach gehaltenem Aufbau ein niedrigerer Enddruck erzielbar ist, der Wartungsaufwand minimiert wird sowie die Herstellungskosten gesenkt werden. Zudem soll insbesondere auch das Saugvermögen der Pumpe erhöht werden.The invention is therefore based on the object of specifying an improved diaphragm pump of the type mentioned at the outset, with which a lower final pressure can be achieved with a construction which is kept as simple as possible, the maintenance effort is minimized and the production costs are reduced. In addition, the pumping speed of the pump should also be increased.

Diese Aufgabe wird mit einer Membranvakuumpumpe mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved with a diaphragm vacuum pump with the features of claim 1.

Alternativ oder zusätzlich kann der das Einlassventil umfassende Abschnitt und/oder der das Auslassventil umfassende Abschnitt des zusammenhängenden Bauteils jeweils über einen Aktor zwangsgesteuert sein.Alternatively or additionally, the section comprising the inlet valve and / or the section of the connected component comprising the outlet valve can each be positively controlled via an actuator.

Nachdem mit dem Einlassventil, dem Auslassventil und der Membran alle zu bewegenden Teile in einem einzelnen zusammenhängenden Bauteil integriert sind, ergibt sich ein wesentlich einfacherer Aufbau, womit entsprechend auch der Wartungsaufwand reduziert wird und die Herstellungskosten gesenkt werden. Zudem können hierdurch Rückströmungen über die Ventile reduziert werden, wodurch sich das Saugvermögen steigern lässt, was sich positiv auf das erreichbare Endvakuum der Membranpumpe auswirkt.After all of the parts to be moved are integrated in a single connected component with the inlet valve, the outlet valve and the membrane, the result is a much simpler structure, which also reduces the maintenance effort and the manufacturing costs. In addition, backflows through the valves can be reduced as a result, which can increase the pumping speed, which has a positive effect on the achievable ultimate vacuum of the diaphragm pump.

Das einzelne zusammenhängende Bauteil kann insgesamt als eine Membran ausgebildet sein, die einen dem Schöpfraum zugeordneten Membranabschnitt, der der Membran einer herkömmlichen Membranpumpe entspricht, und für jedes Ventil einen Membranabschnitt umfasst, der die Ventilmembran eines Membranventils bildet.The individual connected component can be designed as a membrane as a whole, which comprises a membrane section assigned to the pumping chamber, which corresponds to the membrane of a conventional membrane pump, and a membrane section for each valve, which forms the valve membrane of a membrane valve.

Bevorzugt ist vorgesehen, dass die Bewegung des Einlassventils und/oder des Auslassventils durch den Antrieb zwangsgesteuert ist. Dies stellt eine besonders wirksame Maßnahme zur Reduzierung von Rückströmungen dar.It is preferably provided that the movement of the inlet valve and / or the outlet valve is positively controlled by the drive. This is a particularly effective measure to reduce backflow.

Wie bereits erwähnt, kann der das Einlassventil umfassende Abschnitt und/oder der das Auslassventil umfassende Abschnitt des zusammenhängenden Bauteils jeweils über einen Aktor zwangsgesteuert sein.As already mentioned, the section comprising the inlet valve and / or the section of the connected component comprising the outlet valve can each be positively controlled via an actuator.

Durch die Art und Weise der Steuerung, insbesondere durch die Wahl von Steuerzeiten und/oder - wenn Steuernocken vorgesehen sind - durch die Form der Steuernocken, können die Förderleistung und der Enddruck der Membranpumpe stark beeinflusst werden: So kann insbesondere mit dem Hub des Einlassventils der Querschnitt eines Ansaugkanals gezielt verändert werden, was sich direkt auf das Saugvermögen der Membranpumpe auswirkt. Je später das Auslassventil öffnet, desto höher ist die Kompression im Schöpfraum. Eine höhere Kompression wiederum führt zu niedrigeren Drücken im Schöpfraum.The delivery rate and the final pressure of the diaphragm pump can be greatly influenced by the type of control, in particular by the selection of control times and / or - if control cams are provided - by the shape of the control cams: In particular, with the stroke of the inlet valve, the Cross-section of an intake duct can be changed in a targeted manner, which has a direct effect on the pumping speed of the diaphragm pump. The later the outlet valve opens, the higher the compression in the pumping chamber. A higher compression in turn leads to lower pressures in the delivery space.

Erfindungsgemäß ist zumindest der die Membran umfassende Abschnitt des zusammenhängenden Bauteils über einen Kurbeltrieb beaufschlagbar.According to the invention, at least the section of the connected component comprising the membrane can be acted upon by a crank mechanism.

Die Integration des Einlassventils und des Auslassventils in einem zudem die Membran umfassenden einzelnen zusammenhängenden Bauteil bringt insbesondere auch den Vorteil mit sich, dass die Ventilsteuerung in den Bereich des Kurbeltriebs der Membranpumpe verlagert werden kann, womit der Aufbau der Pumpe insgesamt vereinfacht werden kann.The integration of the inlet valve and the outlet valve in an individual continuous component that also includes the membrane also has the particular advantage that the valve control can be moved into the area of the crank mechanism of the membrane pump, which can simplify the overall structure of the pump.

So ist zumindest ein Aktor mit dem Kurbeltrieb der Membranpumpe gekoppelt oder von diesem umfasst.At least one actuator is thus coupled to the crank mechanism of the diaphragm pump or encompassed by it.

Der Kurbeltrieb der Membranpumpe umfasst einen Pleuel, der zwischen einer Exzenterwelle und einem das zusammenhängende Bauteil beaufschlagenden Kolbenelement angeordnet ist.The crank mechanism of the diaphragm pump comprises a connecting rod which is arranged between an eccentric shaft and a piston element which acts on the connected component.

Erfindungsgemäß ist der Pleuel über einen Kreuzkopf mit dem das zusammenhängende Bauteil beaufschlagenden Kolbenelement gekoppelt.According to the invention, the connecting rod is coupled via a crosshead to the piston element which acts on the connected component.

Ein derartiger Aufbau hat eine lineare Bewegung der Membran zur Folge und führt zu einem kleineren Totvolumen im Schöpfraum.Such a structure results in a linear movement of the membrane and leads to a smaller dead volume in the scoop.

Grundsätzlich sind jedoch insbesondere auch solche Ausführungen der Membranpumpe denkbar, bei denen zumindest ein Aktor einen elektrisch ansteuerbaren Erreger umfasst, beispielsweise einen Elektromagneten, ein Piezoelement oder dergleichen.In principle, however, embodiments of the diaphragm pump are also conceivable in which at least one actuator comprises an electrically controllable exciter, for example an electromagnet, a piezo element or the like.

Gemäß einer weiteren zweckmäßigen Ausführungsform der erfindungsgemäßen Membranpumpe ist der das Einlassventil umfassende Abschnitt und/oder der das Auslassventil umfassende Abschnitt des einzelnen zusammenhängenden Bauteils durch den jeweiligen Aktor entgegen einer Federkraft beaufschlagbar. Nach einer Betätigung durch einen jeweiligen Aktor kann das jeweilige Ventil dann automatisch durch die Federkraft zurückgestellt werden.According to a further expedient embodiment of the diaphragm pump according to the invention, the section comprising the inlet valve and / or the section comprising the outlet valve of the individual connected component can be acted upon by the respective actuator against a spring force. After actuation by a respective actuator, the respective valve can then be automatically reset by the spring force.

Ein jeweiliger Aktor kann insbesondere berührungslos ansteuerbar sein, beispielsweise über eine Lichtschranke, eine Magnetspule oder dergleichen.A respective actuator can in particular be controllable without contact, for example via a light barrier, a magnetic coil or the like.

Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert; in dieser zeigen:

  • Fig. 1 : eine schematische Teildarstellung einer beispielhaften Ausführungsform einer erfindungsgemäßen Membranpumpe,
  • Fig. 2 : eine schematische Seitenansicht der Exzenterwelle und der Nocken des Kurbeltriebs der Membranpumpe gemäß Fig. 1 ,
  • Fig. 3 : eine Draufsicht des das Einlassventil, das Auslassventil und die Membran umfassenden einzelnen zusammenhängenden Bauteils der Membranpumpe gemäß Fig. 1 ,
  • Fig. 4 : eine schematische Teildarstellung einer weiteren beispielhaften Ausführungsform einer erfindungsgemäßen Membranpumpe,
  • Fig. 5 : eine schematische Darstellung eines Kolbentriebs für eine Membranpumpe ohne Kreuzkopf, und
  • Fig. 6 : eine schematische Darstellung eines Kolbentriebs für eine erfindungsgemäße Membranpumpe mit Kreuzkopf.
The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing; in this show:
  • Fig. 1 : a schematic partial representation of an exemplary embodiment of a diaphragm pump according to the invention,
  • Fig. 2 : A schematic side view of the eccentric shaft and the cam of the crank mechanism of the diaphragm pump according to Fig. 1 ,
  • Fig. 3 : A top view of the single connected component of the diaphragm pump according to the inlet valve, the outlet valve and the membrane Fig. 1 ,
  • Fig. 4 : a schematic partial representation of a further exemplary embodiment of a diaphragm pump according to the invention,
  • Fig. 5 : a schematic representation of a piston drive for a diaphragm pump without crosshead, and
  • Fig. 6 : A schematic representation of a piston drive for a diaphragm pump according to the invention with a cross head.

Fig. 1 zeigt in schematischer Teildarstellung eine beispielhafte Ausführungsform einer erfindungsgemäßen Membranpumpe 10, bei der es sich insbesondere um eine Membranvakuumpumpe handeln kann. Fig. 1 shows a schematic partial representation of an exemplary embodiment of a diaphragm pump 10 according to the invention, which can in particular be a diaphragm vacuum pump.

Die Membranpumpe 10 umfasst einen über eine Membran 12 beaufschlagbaren Schöpfraum 14 und ein Einlassventil 16 sowie ein Auslassventil 18, über die ein Medium 20 in einer Saugphase in den Schöpfraum 14 gesaugt und in einer Kompressionsphase aus dem Schöpfraum 14 ausgestoßen wird.The membrane pump 10 comprises a scoop chamber 14 which can be acted upon by a membrane 12 and an inlet valve 16 and an outlet valve 18, via which a medium 20 is sucked into the scoop chamber 14 in a suction phase and is expelled from the scoop chamber 14 in a compression phase.

Dabei sind, wie dargestellt, das Einlassventil 16, das Auslassventil 18 und die Membran 12 in einem einzelnen zusammenhängenden Bauteil 22 in Form einer gemeinsamen Membran integriert.As shown, the inlet valve 16, the outlet valve 18 and the membrane 12 are integrated in a single coherent component 22 in the form of a common membrane.

Der das Einlassventil 16 umfassende Abschnitt und der das Auslassventil 18 umfassende Abschnitt des Bauteils 22 ist jeweils über einen Aktor 24 zwangsgesteuert.The section comprising the inlet valve 16 and the section of the component 22 comprising the outlet valve 18 are each positively controlled via an actuator 24.

Zumindest der die Membran 12 umfassende Abschnitt des Bauteils 22 ist über einen Kurbeltrieb 26 beaufschlagbar. Die Aktoren 24 sind mit diesem Kurbeltrieb 26 gekoppelt.At least the section of the component 22 comprising the membrane 12 can be acted upon by a crank mechanism 26. The actuators 24 are coupled to this crank mechanism 26.

Beim vorliegenden Ausführungsbeispiel umfassen die Aktoren 24 jeweils einen Schwenkarm 28, der an einem Ende um eine Schwenkachse 30 drehbar gelagert ist und mit seinem anderen Ende an einem Nocken 32 (vgl. auch Fig. 2) des Kurbeltriebs 26 anliegt, sowie einen sich in vertikaler Richtung erstreckenden Stößel 34, der durch den Schwenkarm 28 beaufschlagbar und in vertikaler Richtung gegen den das Einlassventil 16 umfassenden Abschnitt bzw. den das Auslassventil 18 umfassenden Abschnitt des einzelnen zusammenhängenden Bauteils 22 pressbar ist.In the present exemplary embodiment, the actuators 24 each comprise a swivel arm 28 which is rotatably supported at one end about a swivel axis 30 and with its other end on a cam 32 (cf. also Fig. 2 ) of the crank mechanism 26, and a plunger 34 extending in the vertical direction, which can be acted upon by the swivel arm 28 and can be pressed in the vertical direction against the section comprising the inlet valve 16 or the section comprising the individual valve 22 comprising the outlet valve 18.

Dabei ist im vorliegenden Fall sowohl der das Einlassventil 16 umfassende Abschnitt als auch der das Auslassventil 18 umfassende Abschnitt des Bauteils 22 durch den jeweiligen Aktor 24 jeweils entgegen der Kraft einer Druckfeder 36 beaufschlagbar. Nach einer jeweiligen Betätigung des Einlassventils 16 bzw. Auslassventils 18 durch den betreffenden Aktor 24 wird dieses Ventil durch die zugeordnete Druckfeder 36 wieder zurückgestellt.In the present case, both the section comprising the inlet valve 16 and the section of the component 22 comprising the outlet valve 18 can each be acted upon by the respective actuator 24 against the force of a compression spring 36. After actuation of the intake valve 16 or exhaust valve 18 by the relevant actuator 24, this valve is reset by the associated compression spring 36.

Der Kurbeltrieb 26 umfasst einen Pleuel 38, der zwischen einer Exzenterwelle 40 und einem das einzelne zusammenhängende Bauteil 22 beaufschlagenden Kolbenelement 42 angeordnet ist.The crank mechanism 26 comprises a connecting rod 38 which is arranged between an eccentric shaft 40 and a piston element 42 which acts on the individual connected component 22.

Wie anhand der Fig. 1 zudem zu erkennen ist, ist die gemeinsame Membran 22 zwischen einem Kopfdeckel 44 und dem Gehäuse 46 der Membranpumpe 10 eingespannt.As with the Fig. 1 can also be seen, the common membrane 22 is clamped between a head cover 44 and the housing 46 of the membrane pump 10.

Fig. 2 zeigt in schematischer Seitenansicht die mit dem Pleuel 38 (Fig. 1) gekoppelte Exzenterwelle 40 und die Nocken 32 des Kurbeltriebs 26, die in Bezug auf die Exzenterwelle 40 derart angeordnet und ausgebildet sind, dass die Ventile 16, 18 entsprechend dem durch die Bewegung des Pleuels 38 und somit durch die sich drehende Exzenterwelle 40 gesteuerten Pumprythmus gesteuert werden. Fig. 2 shows a schematic side view of the connecting rod 38 ( Fig. 1 ) coupled eccentric shaft 40 and the cams 32 of the crank mechanism 26, which are arranged and designed with respect to the eccentric shaft 40 in such a way that the valves 16, 18 are controlled in accordance with the pumping rhythm controlled by the movement of the connecting rod 38 and thus by the rotating eccentric shaft 40 will.

In der Fig. 3 ist in einer Draufsicht das das Einlassventil 16, das Auslassventil 18 und die Membran 12 umfassende Bauteil 22 der Membranpumpe 10 wiedergegeben. Wie Fig. 3 zeigt, umfasst das Bauteil 22 im Bereich der Ventile 16, 18 jeweils eine entsprechende Dichtfläche.In the Fig. 3 is a top view of the component 22 of the diaphragm pump 10 which comprises the inlet valve 16, the outlet valve 18 and the diaphragm 12. How Fig. 3 shows, the component 22 in the region of the valves 16, 18 each comprises a corresponding sealing surface.

Fig. 4 zeigt in schematischer Teildarstellung eine weitere beispielhafte Ausführungsform einer erfindungsgemäßen Membranpumpe 10, die sich von der in der Fig. 1 wiedergegebenen Ausführungsform im Wesentlichen dadurch unterscheidet, dass ein jeweiliger Aktor 24 im vorliegenden Fall einen um eine Achse 48 drehbar gelagerten zweiarmigen Hebel umfasst. Der Hebel liegt mit einem sich allgemein in vertikaler Richtung erstreckenden Abschnitt 24' an der Exzenterwelle 40 des Kurbeltriebs 26 an und ist am freien Ende eines sich allgemein horizontal erstreckenden Abschnitts 24" mit einem sich allgemein vertikal nach oben erstreckenden Ansatz 24"' versehen. Über den Ansatz 24'" ist das Einlassventil 16 bzw. das Auslassventil 18 entsprechend beaufschlagbar. Fig. 4 shows a schematic partial representation of a further exemplary embodiment of a diaphragm pump 10 according to the invention, which differs from that in FIG the Fig. 1 reproduced embodiment essentially differs in that a respective actuator 24 in the present case comprises a two-armed lever rotatably mounted about an axis 48. The lever abuts the eccentric shaft 40 of the crank mechanism 26 with a generally vertically extending portion 24 'and is provided with a generally vertically upwardly extending extension 24 "' at the free end of a generally horizontally extending portion 24". The inlet valve 16 or the outlet valve 18 can be acted upon accordingly via the attachment 24 ′ ″.

Im Übrigen besitzt diese Membranpumpe 10 zumindest im Wesentlichen wieder denselben Aufbau wie jene der Fig. 1, wobei einander entsprechenden Teilen gleiche Bezugszeichen zugeordnet sind.Otherwise, this diaphragm pump 10 has at least essentially the same structure as that of FIG Fig. 1 , corresponding parts being assigned the same reference numerals.

Der Pleuel 38 (vgl. Fig. 1) des Kurbeltriebs 26 einer jeweiligen Membranpumpe 10 ist über einen Kreuzkopf 50 (vgl. Fig. 6) mit dem das Bauteil 22 beaufschlagenden Kolbenelement 42 gekoppelt.The connecting rod 38 (cf. Fig. 1 ) of the crank mechanism 26 of a respective diaphragm pump 10 is via a crosshead 50 (cf. Fig. 6 ) coupled to the piston element 42 acting on the component 22.

Fig. 5 zeigt in schematischer Darstellung einen Kolbentrieb ohne Kreuzkopf. Dabei ist der Pleuel 38 über einen Kolbenbolzen 52 unmittelbar mit dem Kolbenelement 42 verbunden. Fig. 5 shows a schematic representation of a piston drive without a crosshead. The connecting rod 38 is connected directly to the piston element 42 via a piston pin 52.

Demgegenüber ist in der Fig. 6 in schematischer Darstellung eine beispielhafte Ausführungsform eines Kolbentriebs mit Kreuzkopf 50 wiedergegeben. Hierbei ist der Pleuel 38 über einen Kreuzkopf 50 mit dem das einzelne zusammenhängende Bauteil 22 beaufschlagenden Kolbenelement 42 gekoppelt.In contrast, in the Fig. 6 an exemplary embodiment of a piston drive with crosshead 50 is shown in a schematic representation. Here, the connecting rod 38 is coupled via a crosshead 50 to the piston element 42 which acts on the individual connected component 22.

Die Kolbenstange 54 ist hier starr mit dem Boden des Kolbenelements 42 und einem Schwenklager 56 des Kreuzkopfes 50 verbunden. Das Schwenklager 56 ist an einem Gleitschuh 58 des Kreuzkopfes angeordnet, der entlang einer Gleitlagerwandung 60 verschiebbar ist. Bei einer derartigen Kreuzkopfanordnung ist das Kolbenelement 42 von Querkräften freigehalten.The piston rod 54 is rigidly connected to the bottom of the piston element 42 and a pivot bearing 56 of the crosshead 50. The pivot bearing 56 is arranged on a sliding shoe 58 of the crosshead, which is displaceable along a sliding bearing wall 60. In such a crosshead arrangement, the piston element 42 is kept free from transverse forces.

In alternativen Ausgestaltungen können die Aktoren 24 jeweils auch einen Elektromagneten, ein Piezoelement oder einen anderen elektrisch ansteuerbaren Erreger umfassen.In alternative configurations, the actuators 24 can also each comprise an electromagnet, a piezo element or another electrically controllable exciter.

Ein jeweiliger Aktor 24 kann beispielsweise über eine Lichtschranke, eine Magnetspule oder auf andere Art und Weise berührungslos insbesondere von einem Kurbeltrieb ansteuerbar sein.-.-.-.A respective actuator 24 can be controlled, for example, via a light barrier, a magnetic coil or in some other way without contact, in particular by a crank mechanism.

BezugszeichenlisteReference list

1010th
MembranpumpeDiaphragm pump
1212th
Membranmembrane
1414
SchöpfraumCreative space
1616
EinlassventilInlet valve
1818th
AuslassventilExhaust valve
2020th
Mediummedium
2222
einzelnes zusammenhängendes Bauteilsingle connected component
2424th
AktorActuator
24'24 '
HebelabschnittLever section
24"24 "
HebelabschnittLever section
24"'24 "'
Ansatzapproach
2626
KurbeltriebCrank mechanism
2828
SchwenkarmSwivel arm
3030th
SchwenkachseSwivel axis
3232
Nockencam
3434
StößelPestle
3636
DruckfederCompression spring
3838
PleuelConnecting rod
4040
ExzenterwelleEccentric shaft
4242
KolbenelementPiston element
4444
KopfdeckelHead cover
4646
Gehäusecasing
4848
Achseaxis
5050
KreuzkopfCross head
5252
KolbenbolzenPiston pin
5454
KolbenstangePiston rod
5656
SchwenklagerSwivel bearing
5858
GleitschuhSliding shoe
6060
GleitlagerwandungPlain bearing wall

Claims (7)

  1. A diaphragm vacuum pump (10) comprising a suction chamber (14) which can be acted on via a diaphragm (12); an inlet valve (16) and an outlet valve (18), via which valves a medium (20) is sucked into the suction chamber (14) in a suction phase and is expelled from the suction chamber (14) in a compression phase, wherein the inlet valve (16), the outlet valve (18) and the diaphragm (12) are integrated in a single contiguous component (22),
    characterized in that a control of the inlet valve (16) and/or of the outlet valve (18) is derived from a drive (26) of the diaphragm (12), with at least the section of the single contiguous component (22) comprising the diaphragm (12) being able to be acted on via a crank drive (26), with the crank drive (26) comprising a connecting rod (38) which is arranged between an eccentric shaft (40) and a piston element (42) which acts on the single contiguous component (22), and with the connecting rod (38) being coupled via a crosshead (50) to the piston element (42) which acts on the single contiguous component (22).
  2. A diaphragm pump in accordance with claim 1,
    characterized in that the movement of the inlet valve (16) and/or of the outlet valve (18) is compulsorily controlled by the drive (26).
  3. A diaphragm pump in accordance with claim 1 or claim 2,
    characterized in that the section comprising the inlet valve (16) and/or the section of the single contiguous component (22) comprising the outlet valve (18) is/are respectively compulsorily controlled via an actuator (24).
  4. A diaphragm pump in accordance with claim 1,
    characterized in that at least one actuator (24) is coupled to the crank drive (26) or linear drive or is comprised thereby.
  5. A diaphragm pump in accordance with claim 3 or claim 4,
    characterized in that at least one actuator (24) comprises an electrically controllable exciter, in particular an electromagnet or a piezo element.
  6. A diaphragm pump in accordance with any one of the preceding claims,
    characterized in that the section comprising the inlet valve (16) and/or the section of the single contiguous component (22) comprising the outlet valve (18) can be acted on by the respective actuator (24) against a spring force.
  7. A diaphragm pump in accordance with any one of the claims 3 to 6,
    characterized in that a respective actuator (24) can be controlled in a contactless manner, in particular via a light barrier or a magnetic coil.
EP15151943.6A 2014-03-13 2015-01-21 Diaphragm pump Active EP2918835B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014103459.7A DE102014103459A1 (en) 2014-03-13 2014-03-13 diaphragm pump

Publications (3)

Publication Number Publication Date
EP2918835A1 EP2918835A1 (en) 2015-09-16
EP2918835B1 EP2918835B1 (en) 2017-03-29
EP2918835B2 true EP2918835B2 (en) 2020-04-29

Family

ID=52358666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15151943.6A Active EP2918835B2 (en) 2014-03-13 2015-01-21 Diaphragm pump

Country Status (2)

Country Link
EP (1) EP2918835B2 (en)
DE (1) DE102014103459A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112811519B (en) * 2021-01-06 2022-07-01 杭州电子科技大学 Water purifier water treatment booster pump energy recuperation system
DE102021204407A1 (en) 2021-05-03 2022-11-03 Robert Bosch Gesellschaft mit beschränkter Haftung Method of operating a pump and fluid supply system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE809457C (en) * 1947-03-12 1951-07-30 Marcel Rene Armand Chabay Reciprocating compressors
US2785638A (en) * 1954-04-08 1957-03-19 Clifford B Moller Force pump for slurries
US4411603A (en) * 1981-06-24 1983-10-25 Cordis Dow Corp. Diaphragm type blood pump for medical use
DE29723455U1 (en) 1997-12-10 1998-09-17 ASF THOMAS Industries GmbH, 82178 Puchheim Diaphragm for diaphragm pump
DE10146190A1 (en) * 2000-09-14 2002-04-25 Jan W Beenker Method used for conveying transportable (gaseous, liquid, pasty or trickling) media within a conveying space comprises a drive exerted as a pulsating wave movement producing a migrating wave
DE202010002145U1 (en) * 2010-02-09 2011-09-07 Vacuubrand Gmbh + Co Kg Diaphragm vacuum pump
DE102010019057A1 (en) * 2010-05-03 2011-11-03 Wmf Württembergische Metallwarenfabrik Ag fluid pump

Also Published As

Publication number Publication date
DE102014103459A1 (en) 2015-09-17
EP2918835B1 (en) 2017-03-29
EP2918835A1 (en) 2015-09-16

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