EP0716229B1 - Double diaphragm pump - Google Patents
Double diaphragm pump Download PDFInfo
- Publication number
- EP0716229B1 EP0716229B1 EP95118226A EP95118226A EP0716229B1 EP 0716229 B1 EP0716229 B1 EP 0716229B1 EP 95118226 A EP95118226 A EP 95118226A EP 95118226 A EP95118226 A EP 95118226A EP 0716229 B1 EP0716229 B1 EP 0716229B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diaphragm pump
- double diaphragm
- pump according
- housing section
- diaphragms
- 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.)
- Expired - Lifetime
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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
- F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
- F04B43/026—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel each plate-like pumping flexible member working in its own pumping chamber
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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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18248—Crank and slide
- Y10T74/18256—Slidable connections [e.g., scotch yoke]
Definitions
- the invention relates to a double-acting diaphragm pump (Double diaphragm pump) according to the generic term of Claim 1.
- a double diaphragm pump has become known from DE 32 06 242 with a centrally mounted in a housing Pistons with attached to each of its free ends, each a displacement membrane impinged on the pump membrane.
- the Displacement spaces are with the suction nozzle on the one hand and the pressure port on the other hand connected via check valves.
- a device is provided for alternating Applying the on to the displacement rooms arranged opposite side of the membranes Pressure chambers for the drive medium. With alternate When exposed to compressed air, the membranes become the same direction moves, the compressed air moving a membrane towards Product space moves and the medium is pumped into the discharge nozzle repressed; the other membrane has an intake stroke out. The pumped medium is therefore compressed air ousted and promoted.
- Such pumps have a number of advantages. They are safe to run dry and self-priming. A brief overload is also not critical. They are not shaft seals required and no rotating parts in the product stream.
- the pump sensitive to solids. Impurities and solids can be conveyed in the product stream will. For the rest, displacement is also the case with such a pump can be used for shear sensitive media.
- the invention has for its object to provide a double diaphragm pump, the is simply constructed and works reliably, and despite the higher pump pressures can be operated with high efficiency.
- the double diaphragm pump according to the invention is with mechanically driven diaphragms Mistake.
- the invention provides a guide frame on the opposite sides, the piston rods connected to the membranes are connected.
- a sliding block is mounted and guided by means of a linear guide.
- the backdrop stone in turn supports the journal of a front crank, which is connected to the drive motor connected is.
- Two guides, preferably round rods, are used for linear guidance used.
- the crank pin is preferably mounted in the sliding block by means of a roller bearing.
- a roller bearing Of the Sliding block inevitably follows the circular motion of the crank pin, remains but oriented in the same position due to the forced guidance in the management frame, causing it to oscillate along the guides. This gives the guides an oscillating movement in the direction of the positively guided piston rods. On in this way a low-friction, yet mechanically simple transmission of the Rotary movement of the drive motor on the linearly adjustable piston rods reached.
- the sliding block is preferably guided by means of plastic plain bearings, as is that Piston rod in the corresponding guide holes in the housing.
- the guide frame with the sliding block is enclosed within a Housing section arranged, the piston rods via plastic sliding bushes are sealed to the outside. If a membrane breaks, it prevents that medium gets into the drive.
- the housing section has a lateral approach in which the Bearing for the front crank is arranged.
- the housing section can be a Form the system for the membrane.
- the membranes have approximately the shape of a Ball cap. This shape ensures that there are no wrinkles in the membrane stroke Membranes are formed, which otherwise easily lead to damage after a certain operating time can.
- a double diaphragm pump is created, even at higher back pressures due to the mechanical Forced operation works with a high degree of efficiency. It can be driven with an almost constant characteristic curve, comparable to piston pumps, with a certain Restriction made by the elasticity of the membranes must become.
- the pump according to the invention can therefore be a Deliver the specified delivery rate at a specified pressure. It is small and can be operated quietly
- the housing of the pump can be made of many materials, for example aluminum, cast iron or stainless steel, each according to the conditions of use. It can also be a plastic case used, for example made of polypropylene, Polytetrafluoroethylene, polyvinylidene fluoride or the like. To protect the membranes against abrasive and against A coating can be used to protect aggressive media PTFE film can be made. Such a membrane is however became known from the G 84 32 2045.
- the double diaphragm pump shown in Figures 1 and 2 has a first housing section 10, which is box-like and a tubular one going out to one side Approach 12 has.
- Section 10 and Approach 12 are in one piece shaped, for example from cast aluminum, cast iron, Stainless steel or the like.
- the flanges 14, 16 are assigned to circular membrane housing sections 22 and 24, which are screwed to the flanges 14, 16.
- membranes 26 and 28 are clamped in these parts, which have an O-ring-shaped cross section on the circumference, as shown at 30 and 32, respectively. You sit in appropriate Ring grooves of flange 14, 16 or housing section 22, 24, so that the membranes 26, 28 are held securely.
- the membranes 26, 28 are made of a suitable elastomer and can go to the displacement space 34 or 36 with PTFE be coated. They are also through fabric inserts reinforced. The membranes 26, 28 have an approximately spherical cap shape. Therefore, they do not wrinkle during their stroke.
- the membranes 26, 28 divide the Interior of the membrane housing sections 22, 24 in one Displacement space 34, 36 and a compensation space 38 or 40.
- the displacement spaces 34, 36 are over corresponding Line sections 42, 44 and ball check valves 46, 48 connected to a suction nozzle 50. You are also via ball check valves 52, 54 and line sections 56, 58 connected to a pressure port 60.
- the compensation rooms 38, 40 are connected to one another via a connecting line 62 connected.
- housing section 10 In the housing section 10 is an approximately rectangular guide frame 64 arranged on the opposite Ends of piston rods 66, 68 are attached.
- the piston rods extend through slide bearings 70, 72 of the housing section 10, lined with plastic bushings 74, 75 are.
- the piston rods 66, 68 connected to the membrane 26 or 28.
- a disc 80 or 82 is seated on the Circumference is rounded between a shoulder of the piston rod 66, 68 and the membrane section, whereby the relevant Membrane section is securely clamped.
- Two round bars are spaced apart in parallel in the guide frame 64 84, 86 attached. They consist of a suitable one Material that is manufactured and available in bars.
- the guide rods 84, 86 extend through guide bores of a sliding block 88.
- the guide holes are lined with plastic bushings 90 and 92 respectively.
- crankshaft 94 rotatably supported in the neck 12.
- the Crankshaft 94 is connected to an output shaft via a clutch 96 98 of an electric motor, not shown 100 in drive connection.
- a pin 102 of the crankshaft 94 is centered by means of a roller bearing 104 Drilled through the sliding block 88 stored.
- the housing section is for better accessibility 10 on the front side of the crankshaft 94 through a plate 106 completed, which can be removed.
- crankshaft 94 If the crankshaft 94 is driven, the sliding block 98 inevitably taken. He runs a circling Movement off, but remains up due to the positive guidance the guide rods 84, 86 in the position.
- the leadership framework 84 is in turn through the piston rods 66, 68 positively guided. This will cause the rotary motion of the crankshaft 94 in an oscillating movement of the piston rods 66, 68 converted.
- the stroke of the piston rods 66, 68 and so the diaphragms 26, 28 is by the length of the crank arm certainly. If the stroke is to be changed, one is to use another crankshaft 94.
- Fig. 1 on the left has the displacement space 34 maximum volume.
- the membrane 26 is approximately on the housing section 18, however, does not touch it. Touching should be avoided if possible, because it can damage the membrane.
- the membrane 28, however, has reached the dead center of its pressure stroke.
- a suitable sensor e.g. a pressure sensor
- the displacement space 34, 36 facing away from the Membranes 26, 28 are monitored to identify a hole or hole Determine the membrane breakage in good time.
- a suitable sensor e.g. a pressure sensor
- Such one Pressure sensor can be connected to the connecting line 62 be.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine doppelt wirkende Membranpumpe (Doppelmembranpumpe) nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a double-acting diaphragm pump (Double diaphragm pump) according to the generic term of Claim 1.
Aus der DE 32 06 242 ist eine Doppelmembranpumpe bekanntgeworden
mit einem zentrisch in einem Gehäuse gelagerten
Kolben mit an jedem seiner freien Enden befestigten, je
einen Verdrängungsraum beaufschlagten Pumpenmembran. Die
Verdrängungsräume sind mit dem Saugstutzen einerseits und
dem Druckstutzen andererseits über Rückschlagventile verbunden.
Ferner ist eine Einrichtung vorgesehen zur wechselweisen
Beaufschlagung der auf der zu den Verdrängungsräumen
gegenüberliegenden Seite der Membranen angeordneten
Druckkammern für das Antriebsmedium. Bei wechselweiser
Beaufschlagung mit Druckluft werden die Membranen gleichsinnig
bewegt, wobei die Druckluft eine Membran in Richtung
Produktraum bewegt und das Fördermedium in den Druckstutzen
verdrängt; die andere Membran führt einen Ansaughub
aus. Das Fördermedium wird mithin durch Druckluft
verdrängt und damit gefördert. A double diaphragm pump has become known from
Derartige Pumpen haben etliche Vorteile. Sie sind trockenlaufsicher und selbstansaugend. Auch eine kurzzeitige Überbelastung ist unkritisch. Es sind keine Wellenabdichtungen erforderlich und keine rotierenden Teile im Produktstrom. Darüber hinaus ist die Pumpe feststoffumempfindlich. Verunreinigungen und Feststoffe können im Produktstrom mitgefördert werden. Im übrigen ist die Verdrängerförderung bei einer derartigen Pumpe auch für scherempfindliche Medien einsetzbar. Nachteilig ist hingegen, daß vor allen Dingen bei höheren Pumpendrücken, zum Beispiel bis zu 6 bar, wegen der Kompressibilität der Luft eine erhebliche Kompressorleistung zur Verfügung gestellt werden muß. Bei höheren Drücken sind daher derartige Membranpumpen nicht mehr wirtschaftlich einsetzbar.Such pumps have a number of advantages. They are safe to run dry and self-priming. A brief overload is also not critical. They are not shaft seals required and no rotating parts in the product stream. In addition, the pump sensitive to solids. Impurities and solids can be conveyed in the product stream will. For the rest, displacement is also the case with such a pump can be used for shear sensitive media. On the other hand, it is disadvantageous that above all higher pump pressures, for example up to 6 bar, because of the compressibility of the air a significant compressor performance must be made available. At higher Therefore, such diaphragm pumps can no longer be used economically.
Aus der Firmenschrift ,,Membranpumpen Typ Wiking M" der Firma Abel GmbH & Co. Pumpen und Maschinenbau ist bekanntgeworden, die Membran mechanisch anzutreiben. Eine Kolbenstange ist mit einem Kreuzkopf verbunden, der seinerseits an eine Pleuelstange angelenkt ist. Der mechanische Aufwand ist bei einer derartigen Pumpe jedoch erheblich. Außerdem erzeugt eine Einfachmembranpumpe eine stärkere Pulsation und fördert bei gleicher Drehzahl des Antriebs nur 50% des Volumens wie eine Doppelmembranpumpe.From the company publication "Diaphragm Pumps Type Wiking M" from Abel GmbH & Co. Pumps and mechanical engineering have become known for mechanically driving the membrane. A piston rod is connected to a crosshead, which in turn is connected to a connecting rod is articulated. However, the mechanical effort is considerable in such a pump. In addition, a single diaphragm pump creates a stronger pulsation and promotes at the same speed of the drive only 50% of the volume as a double diaphragm pump.
Aus DE 3 141 667 ist eine Doppelmembranpumpe der eingangs genannten Art bekanntgeworden. Die einander gegenüberliegenden Kolbenstangen, die mit jeweils einer Membran verbunden sind, sind mit einem Führungsrahmen in Verbindung, der einen Führungs-Rundstab hält, mit dem ein Kulissenstein zusammenwirkt. Ein Kurbelzapfen einer Motorwelle ist drehbar im Kulissenstein gelagert. Der Motor ist unmittelbar am Pumpengehäuse angebracht, wobei sich die Motorwelle über ein Rollenlager in das Gehäuse der Pumpe hineinerstreckt.From DE 3 141 667 a double diaphragm pump of the type mentioned has become known. The opposing piston rods, each with a membrane are connected to a guide frame, which is a guide rod holds with which a sliding block interacts. A crankpin of an engine shaft is rotatably mounted in the sliding block. The motor is directly on the pump housing attached, with the motor shaft via a roller bearing in the housing of the pump stretched in.
Der Erfindung liegt die Aufgabe zugrunde, eine Doppelmembranpumpe zu schaffen, die einfach aufgebaut ist und betriebssicher arbeitet und die trotz höherer Pumpendrücke mit einem hohen Wirkungsgrad betrieben werden kann. The invention has for its object to provide a double diaphragm pump, the is simply constructed and works reliably, and despite the higher pump pressures can be operated with high efficiency.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. This object is achieved by the features of patent claim 1.
Die erfindungsgemäße Doppelmembranpumpe ist mit mechanisch angetriebenen Membranen versehen. Für die Übertragung der Drehbewegung in die oszillierende der Membranen sieht die Erfindung einen Führungsrahmen vor, an den an gegenüberliegenden Seiten, die mit den Membranen verbundenen Kolbenstangen verbunden sind. Im Führungsrahmen ist ein Kulissenstein gelagert und mittels einer Linearführung geführt. Der Kulissenstein lagert seinerseits den Zapfen einer Stirnkurbel, die mit dem Antriebsmotor verbunden ist. Für die lineare Führung werden zwei Führungen, vorzugsweise Rundstäbe verwendet.The double diaphragm pump according to the invention is with mechanically driven diaphragms Mistake. For the transmission of the rotary motion into the oscillating membrane the invention provides a guide frame on the opposite sides, the piston rods connected to the membranes are connected. In the management framework a sliding block is mounted and guided by means of a linear guide. The backdrop stone in turn supports the journal of a front crank, which is connected to the drive motor connected is. Two guides, preferably round rods, are used for linear guidance used.
Der Kurbelzapfen ist vorzugsweise mittels eines Wälzlagers im Kulissenstein gelagert. Der Kulissenstein macht zwangsläufig die kreisende Bewegung des Kurbelzapfens mit, bleibt jedoch aufgrund der Zwangsführung im Führungsrahmen in der gleichen Lage orientiert, wodurch er sich oszillierend entlang den Führungen bewegt. Die Führungen erhalten dadurch eine oszillierende Bewegung in Richtung der zwangsgeführten Kolbenstangen. Auf diese Weise wird eine reibungsarme, gleichwohl mechanisch einfache Übertragung der Drehbewegung des Antriebsmotors auf die linear verstellbaren Kolbenstangen erreicht. Der Kulissenstein wird vorzugsweise mittels Kunststoffgleitlagern geführt, ebenso wie die Kolbenstange in entsprechenden Führungsbohrungen des Gehäuses.The crank pin is preferably mounted in the sliding block by means of a roller bearing. Of the Sliding block inevitably follows the circular motion of the crank pin, remains but oriented in the same position due to the forced guidance in the management frame, causing it to oscillate along the guides. This gives the guides an oscillating movement in the direction of the positively guided piston rods. On in this way a low-friction, yet mechanically simple transmission of the Rotary movement of the drive motor on the linearly adjustable piston rods reached. The sliding block is preferably guided by means of plastic plain bearings, as is that Piston rod in the corresponding guide holes in the housing.
Bei der Erfindung ist der Führungsrahmen mit dem Kulissenstein innerhalb eines abgeschlossenen Gehäuseabschnitts angeordnet, wobei die Kolbenstangen über Kunststoffgleitbuchsen dichtend nach außen geführt sind. Bei dem Bruch einer Membran wird verhindert, daß Medium in den Antrieb gelangt. Besonders bevorzugt ist eine Ausführungsform der Erfindung, bei der der Gehäuseabschnitt einen seitlichen Ansatz aufweist, in dem das Lager für die Stirnkurbel angeordnet ist. Der Gehäuseabschnitt kann gleichzeitig eine Anlage für die Membran bilden.In the invention, the guide frame with the sliding block is enclosed within a Housing section arranged, the piston rods via plastic sliding bushes are sealed to the outside. If a membrane breaks, it prevents that medium gets into the drive. An embodiment of the is particularly preferred Invention, in which the housing section has a lateral approach in which the Bearing for the front crank is arranged. The housing section can be a Form the system for the membrane.
Nach einer Ausgestaltung der Erfindung haben die Membranen etwa die Form einer Kugelkappe. Diese Form stellt sicher, daß während des Membranhubes keine Falten in der Membran entstehen, welche sonst leicht nach einer gewissen Betriebszeit zu Schäden führen können.According to one embodiment of the invention, the membranes have approximately the shape of a Ball cap. This shape ensures that there are no wrinkles in the membrane stroke Membranes are formed, which otherwise easily lead to damage after a certain operating time can.
Mit der Erfindung ist eine Doppelmembranpumpe geschaffen, die auch bei höheren Gegendrücken aufgrund der mechanischen Zwangsführung mit einem hohen Wirkungsgrad arbeitet. Sie kann mit annähernd konstanter Kennlinie gefahren werden, vergleichbar den Kolbenpumpen, wobei eine gewisse Einschränkung durch die Elastizität der Membranen gemacht werden muß. Die erfindungsgemäße Pumpe kann mithin eine vorgegebene Fördermenge bei einem vorgegebenen Druck fördern. Sie baut klein und kann geräuscharm betrieben werdenWith the invention, a double diaphragm pump is created, even at higher back pressures due to the mechanical Forced operation works with a high degree of efficiency. It can be driven with an almost constant characteristic curve, comparable to piston pumps, with a certain Restriction made by the elasticity of the membranes must become. The pump according to the invention can therefore be a Deliver the specified delivery rate at a specified pressure. It is small and can be operated quietly
Das Gehäuse der Pumpe kann aus vielen Materialien bestehen,
beispielswiese Aluminium, Grauguß oder Edelstahl, je
nach den Einsatzverhältnissen. Es kann auch ein Kunststoffgehäuse
verwendet werden, beispielsweise aus Polypropylen,
Polytetrafluorethylen, Polyvinylidenfluorid oder
dergleichen. Um die Membranen gegen abrasive und gegen
aggressive Medien zu schützen, kann eine Beschichtung mit
PTFE-Folie vorgenommen werden. Eine derartige Membran ist
jedoch aus dem G 84 32 2045 bekanntgeworden.The housing of the pump can be made of many materials,
for example aluminum, cast iron or stainless steel, each
according to the conditions of use. It can also be a plastic case
used, for example made of polypropylene,
Polytetrafluoroethylene, polyvinylidene fluoride or
the like. To protect the membranes against abrasive and against
A coating can be used to protect aggressive media
PTFE film can be made. Such a membrane is
however became known from the
Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.
- Fig. 1
- zeigt einen Schnitt durch eine Doppelmembranpumpe nach der Erfindung
- Fig. 2
- zeigt einen Schnitt durch die Darstellung nach Fig. 1 entlang der Linie 2-2.
- Fig. 1
- shows a section through a double diaphragm pump according to the invention
- Fig. 2
- shows a section through the representation of FIG. 1 along the line 2-2.
Die in den Figuren 1 und 2 dargestellte Doppelmembranpumpe
weist einen ersten Gehäuseabschnitt 10 auf, der kastenartig
ist und einen zu einer Seite abgehenden rohrartigen
Ansatz 12 aufweist. Abschnitt 10 und Ansatz 12 sind einteilig
geformt, beispielsweise aus Aluminiumguß, Grauguß,
Edelstahl oder dergleichen. Mit dem Gehäuseabschnitt 10
sind Flansche 14, 16 geformt, die über schwachkugelige
Wandabschnitte 18, 20 mit den Stirnseiten des Gehäuseabschnitts
10 verbunden sind. Den Flanschen 14, 16 sind
kreisförmige Membrangehäuseabschnitte 22 bzw. 24 zugeordnet,
die mit den Flanschen 14, 16 verschraubt sind. Zwischen
diesen Teilen sind Membranen 26 bzw. 28 eingespannt,
die am Umfang einen O-ringförmigen Querschnitt aufweisen,
wie bei 30 bzw. 32 dargestellt. Sie sitzen in entsprechenden
Ringnuten von Flansch 14, 16 bzw. Gehäuseabschnitt 22,
24, so daß die Membranen 26, 28 sicher gehalten sind.The double diaphragm pump shown in Figures 1 and 2
has a
Die Membranen 26, 28 sind aus einem geeigneten Elastomer
und können zum Verdrängungsraum 34 bzw. 36 hin mit PTFE
beschichtet sein. Außerdem sind sie durch Gewebeeinlagen
verstärkt. Die Membranen 26, 28 haben annähernd Kugelkappenform.
Sie werfen daher bei ihrem Hub keine Falten auf.The
Wie schon erwähnt, unterteilen die Membranen 26, 28 den
Innenraum der Membrangehäuseabschnitte 22, 24 in einen
Verdrängungsraum 34, 36 und einen Ausgleichsraum 38 bzw.
40. Die Verdrängungsräume 34, 36 sind über entsprechende
Leitungsabschnitte 42, 44 und Kugelrückschlagventile 46,
48 mit einem Saugstutzen 50 verbunden. Sie sind außerdem
über Kugelrückschlagventile 52, 54 und Leitungsabschnitte
56, 58 mit einem Druckstutzen 60 verbunden. Die Ausgleichsräume
38, 40 sind über eine Verbindungsleitung 62 miteinander
verbunden.As already mentioned, the
Im Gehäuseabschnitt 10 ist ein annähernd rechteckiger Führungsrahmen
64 angeordnet, an dem an gegenüberliegenden
Enden Kolbenstangen 66, 68 angebracht sind. Die Kolbenstangen
erstrecken sich durch Gleitlager 70, 72 des Gehäuseabschnitts
10, die mit Kunststoffbuchsen 74, 75 ausgekleidet
sind. An den Enden sind die Kolbenstangen 66, 68
mit der Membran 26 bzw. 28 verbunden. Zu diesem Zweck ist
ein mit der Kolbenstange 66, 68 verschraubter Teller 76
bzw. 78 in den mittleren Abschnitt der Membran 26, 28 einvulkanisiert.
Ferner sitzt eine Scheibe 80 bzw. 82, die am
Umfang gerundet ist, zwischen einem Absatz der Kolbenstange
66, 68 und dem Membranabschnitt, wodurch der betreffende
Membranabschnitt sicher eingespannt ist.In the
Im Führungsrahmen 64 sind parallel beabstandet zwei Rundstäbe
84, 86 befestigt. Sie bestehen aus einem geeigneten
Material, das stangenweise gefertigt und erhältlich ist.
Die Führungsstäbe 84, 86 erstrecken sich durch Führungsbohrungen
eines Kulissensteins 88. Die Führungsbohrungen
sind mit Kunststoffbuchsen 90 bzw. 92 ausgekleidet.Two round bars are spaced apart in parallel in the
Wie aus Fig. 2 zu erkennen, ist mittels Wälzlagern 91, 93
eine Kurbelwelle 94 im Ansatz 12 drehbar gelagert. Die
Kurbelwelle 94 steht über eine Kupplung 96 mit einer Abtriebswelle
98 eines nicht näher dargestellten Elektromotors
100 in Antriebsverbindung. Ein Zapfen 102 der Kurbelwelle
94 ist mittels eines Wälzlagers 104 in einer mittigen
Durchbohrung des Kulissensteins 88 gelagert.As can be seen from FIG. 2, by means of
Der besseren Zugänglichkeit wegen ist der Gehäuseabschnitt
10 an der Stirnseite der Kurbelwelle 94 durch eine Platte
106 abgeschlossen, die entfernt werden kann.The housing section is for
Wird die Kurbelwelle 94 angetrieben, wird der Kulissenstein
98 zwangsläufig mitgenommen. Er führt eine kreisende
Bewegung aus, bleibt jedoch durch die Zwangsführung auf
den Führungsstäben 84, 86 in der Lage orientiert. Der Führungsrahmen
84 ist seinerseits durch die Kolbenstangen 66,
68 zwangsgeführt. Dadurch wird die Drehbewegung der Kurbelwelle
94 in eine osizillierende Bewegung der Kolbenstangen
66, 68 umgewandelt. Der Hub der Kolbenstangen 66, 68 und
damit der Membranen 26, 28 ist durch die Länge des Kurbelarms
bestimmt. Soll der Hub verändert werden, ist eine
andere Kurbelwelle 94 einzusetzen.If the
Am Ende des Saughubs in Fig. 1 links hat der Verdrängungsraum
34 maximales Volumen. Die Membran 26 liegt annähernd
am Gehäuseabschnitt 18 an, berührt ihn indessen nicht.
Eine Berührung muß nach Möglichkeit vermieden werden, da
sie zur Beschädigung der Membran führen kann. Die Membran
28 hingegen hat den Totpunkt ihres Druckhubes erreicht.At the end of the suction stroke in Fig. 1 on the left has the
Mit einem geeigneten Sensor, z.B. einem Druckaufnehmer,
kann die dem Verdrängungsraum 34, 36 abgewandte Seite der
Membranen 26, 28 überwacht werden, um ein Loch oder einen
Bruch der Membranen rechtzeitig festzustellen. Ein derartiger
Druckaufnehmer kann an die Verbindungsleitung 62 angeschlossen
sein.With a suitable sensor, e.g. a pressure sensor,
can the
Claims (9)
- A double diaphragm pump having flexible diaphragms (26,28) disposed in displacement spaces and connected and mechanically coupled to piston rods (66,68), the displacement spaces being communicated via check valves to a suction manifold on the one hand and to a pressure manifold on the other hand, with each diaphragm (26,28) being connected to a piston rod (66,68), which piston rods extend coaxially and are mounted on opposite sides to a guide frame (64) having at least one lineal guide (84,86) for a slide block (88) which rotably mounts a crank pin (102) of a crank shaft (94), characterized in that the guide frame (64) comprises two lineal guides (84,86) for the slide block (88), the guide frame (64) is received in a closed housing section (10), and the piston rods (66,68) are slidingly and sealingly mounted in plastic sleeves (74) of the housing section (10).
- A double diaphragm pump according to claim 1, characterized in that the lineal guide comprises round rods (84,86) and the slide block (88) includes corresponding guide bores (90,92).
- A double diaphragm pump according to claim 1 or 2, characterized in that said guide bores in the slide block (88) are provided with plastic sleeves (90,92).
- A double diaphragm pump according to any of the claims 1 to 3, characterized in that the closed housing section (10) comprises a lateral extension (2) receiving bearings (1,3) for a crankshaft (94).
- A double diaphragm pump according to any of the claims 1 to 4, characterized in that the diaphragms (26,28) are substantially in the form of spherical caps.
- A double diaphragm pump according to any of the claims 1 to 5, characterized in that each of said piston rods (66,68) is connected to a plate (72,78) vulcanized into the associated diaphragm (26,28) and that diaphragms (26,28) each are fixed between its respective plate (76,78) and a disk (80,82) mounted on the respective piston rod (66,68).
- A double diaphragm pump according to any of the claims 1 to 6, characterized in that the sides of the diaphragms (26,28) remote from their respective displacement space (34,36) are communicated to each other via a communication line (62).
- A double diaphragm pump according to any of the claims 1 to 7, characterized in that the sides of the diaphragm remote from their respective displacement spaces (34,36) are monitored via a pressure sensor or other detector.
- A double diaphragm pump according to any of the claims 1 to 8, characterized in that the closed housing section (10) is mounted by flanges (14,16) inside the pump housing, with the flanges (14,16) being connected to the faces of the housing section (10) by slightly spherical wall portions (18,20) and with the slightly spherical wall section (18,20) limiting the stroke of the diaphragms (26,28) at one side.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4443778 | 1994-12-08 | ||
DE4443778A DE4443778A1 (en) | 1994-12-08 | 1994-12-08 | Double diaphragm pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0716229A1 EP0716229A1 (en) | 1996-06-12 |
EP0716229B1 true EP0716229B1 (en) | 1998-06-24 |
Family
ID=6535323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95118226A Expired - Lifetime EP0716229B1 (en) | 1994-12-08 | 1995-11-20 | Double diaphragm pump |
Country Status (7)
Country | Link |
---|---|
US (1) | US5649809A (en) |
EP (1) | EP0716229B1 (en) |
JP (1) | JP3210851B2 (en) |
AT (1) | ATE167728T1 (en) |
BR (1) | BR9505698A (en) |
DE (2) | DE4443778A1 (en) |
ES (1) | ES2119292T3 (en) |
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-
1994
- 1994-12-08 DE DE4443778A patent/DE4443778A1/en not_active Withdrawn
-
1995
- 1995-11-20 AT AT95118226T patent/ATE167728T1/en not_active IP Right Cessation
- 1995-11-20 EP EP95118226A patent/EP0716229B1/en not_active Expired - Lifetime
- 1995-11-20 DE DE59502649T patent/DE59502649D1/en not_active Expired - Lifetime
- 1995-11-20 ES ES95118226T patent/ES2119292T3/en not_active Expired - Lifetime
- 1995-11-29 US US08/564,437 patent/US5649809A/en not_active Expired - Lifetime
- 1995-12-07 BR BR9505698A patent/BR9505698A/en not_active Application Discontinuation
- 1995-12-08 JP JP34579195A patent/JP3210851B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102518573A (en) * | 2011-12-14 | 2012-06-27 | 江南大学 | Adjustable quantitative injection pump |
CN102518573B (en) * | 2011-12-14 | 2014-11-26 | 江南大学 | Adjustable quantitative injection pump |
Also Published As
Publication number | Publication date |
---|---|
DE59502649D1 (en) | 1998-07-30 |
US5649809A (en) | 1997-07-22 |
EP0716229A1 (en) | 1996-06-12 |
JPH08232847A (en) | 1996-09-10 |
JP3210851B2 (en) | 2001-09-25 |
BR9505698A (en) | 1997-11-11 |
ES2119292T3 (en) | 1998-10-01 |
ATE167728T1 (en) | 1998-07-15 |
DE4443778A1 (en) | 1996-06-20 |
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