EP1134415A2 - Membrane clamping with elasticity compensation system - Google Patents
Membrane clamping with elasticity compensation system Download PDFInfo
- Publication number
- EP1134415A2 EP1134415A2 EP01105806A EP01105806A EP1134415A2 EP 1134415 A2 EP1134415 A2 EP 1134415A2 EP 01105806 A EP01105806 A EP 01105806A EP 01105806 A EP01105806 A EP 01105806A EP 1134415 A2 EP1134415 A2 EP 1134415A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- diaphragm
- membrane
- elastic component
- pump according
- diaphragm 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
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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
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0054—Special features particularities of the flexible members
- F04B43/0063—Special features particularities of the flexible members bell-shaped flexible members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/04—PTFE [PolyTetraFluorEthylene]
Definitions
- the invention relates to a diaphragm pump with a hydraulically driven membrane according to the preamble of claim 1.
- the membrane as the central Element fulfills the double function as a static seal and displacer in Form of an elastic pumping chamber wall.
- the static membrane seal is the Basis for the hermetic tightness of diaphragm pumps.
- the membrane also transfers the oscillating stroke movement of a drive to the one to be conveyed Fluid, which not only stimulates pulsation, but also interaction comes about with the fluid masses in the piping system.
- the oscillating movement becomes a Drive element via a hydraulic master, which comprises a hydraulic fluid, transferred to the membrane.
- the hydraulically driven membrane works always pressure balanced and only has to endure deflection stresses.
- PTFE polytetrafluoroethylene
- Usual membrane constructions are pure PTFE membranes with a rotationally symmetrical shaft contour or flat contour and PTFE as a protective layer on elastomer membranes.
- the limit for the use of PTFE as a membrane for membrane pumps is currently at a delivery pressure of 350 bar and a temperature of 150 ° C
- the reasons for these limits are the insufficient cold flow resistance and sealing pressure of the PTFE in the membrane clamping.
- With constructive Measures e.g. thanks to a suitable groove structure, to counteract the cold flow within limits.
- the creasing prevents the flow of the Membrane material from the membrane clamping. This allows the yield point in the membrane clamping to values far above the yield stress lift out of the tensile test. This is the only way to achieve a secure seal to achieve at 350 bar.
- the invention is therefore based on the object of a diaphragm pump of the above.
- Art to make available which the above Disadvantages eliminated and even with higher ones Delivery pressures and higher operating temperature with long membrane life can be used.
- the negative effect of "breathing" the pump head counteracted in the area of the membrane clamping.
- the diaphragm pump according to the invention there is an additional clamping area at least one elastic component is provided, which is designed in such a way that there are reductions in the pressure force occurring in the operation of the diaphragm pump in the clamping area of the membrane between the pump cover and the Pump housing compensates elastically.
- This design has the advantage that the diaphragm pump is also suitable for high pressures, for example above 350 bar, and for higher temperatures, for example above 150 ° C, is suitable because deformations of Pump cover and pump housing, which lead to a decrease in the contact pressure lead in the clamping area, are effectively balanced. At the same time may become insufficient under certain operating conditions Cold flow resistance and sealing pressure of the membrane material are compensated.
- the arrangement according to the invention increases the elasticity of the Membrane in the clamping area, so that the minimum pressure required for tightness in the clamping area of the membrane, even if it is deformed in the clamping area involved components is retained. That provided according to the invention elastic component has no sealing function, but serves to compensate of fluctuations in the contact pressure in the clamping area of the membrane.
- the elastic reserves of a membrane package are increased in that the Diaphragm comprises two or more layers of material, at least one elastic Component is arranged between at least two layers.
- the elastic Component for example, as an elastic intermediate layer or as an elastic one Intermediate ring formed.
- the elastic component extends over the entire circumference the membrane.
- the elastic component can be arranged on one side or on both sides of the membrane his.
- the elastic component comprises a or several elastomer o-rings.
- the elastic component is used as a lip seal educated.
- the elastic component is an integral part for simple and quick assembly Part of the membrane.
- the membrane is expediently made of PTFE or PE or alternatively of one Elastomer with a protective layer made of PTFE.
- the diaphragm pump shown comprises a diaphragm 10, which separates a delivery chamber 12 from a hydraulic chamber 14.
- a piston 16 As a drive a piston 16 is provided, which is in operation around a constant piston center position oscillates.
- the piston 16 is exemplary in the position of the piston center position shown.
- the oscillating movement of the piston 16 is via a hydraulic fluid in the hydraulic chamber 14 transferred to the membrane 10, which has a corresponding oscillates around a central position.
- the hydraulic chamber 14 has a pressure-limiting one Pressure relief valve 26 and a sniffer valve Refill valve 28 connected to a hydraulic reservoir 30.
- Support surfaces 31, 33 are provided, which laterally a working space of the membrane 10 limit.
- 31 designates the hydraulic support surface and 33 the Support surface on the conveyor chamber side.
- the membrane 10 is between a pump cover 34 and a pump housing 36 is clamped in a predetermined radial clamping area 38 and is preferably supported by groove structures in the pump components 34, 36.
- an elastic element 40 in addition to the membrane 10 arranged, as can be seen by way of example from FIGS. 2 to 5. This elastic element 40 compensates for "breathing" in the clamping area 38 at all times and sets the pressure required for tightness. This means even at high Pressure and temperature loads, which are known about the permissible loads Diaphragm pumps go out, a sufficient surface pressure of the Membrane clamping 38 guaranteed.
- the membrane clamping 38 designed according to the invention thus comprises one Elasticity compensation, since in the clamping area 38 of the membrane 10 the elastic Component 40 is provided.
- the elastic component formed as a lip ring 40, the one side or, as shown in Fig. 2, on both sides the membrane 10 is arranged in the clamping area 38.
- the lip ring 40 is in one piece formed with the membrane 10 so that when the membrane 10 the elastic component 40 is automatically arranged in the clamping area 38 and is mounted.
- the elastic component is an elastomer O-ring 42 formed and around the entire circumference in the clamping area 38 arranged.
- the membrane 10 has two material layers 44, 46, between which a space 48 is formed, for example in fluid-conducting connection with a diaphragm rupture sensor, not shown stands.
- the elastic component is here as an intermediate ring or intermediate layer 50 formed and in the clamping area 38 between the material layers 44, 46 of the Membrane 10 arranged.
- the membrane 10 is, so to speak "floating" stored.
- the elastic reserve of the membrane package 44, 46 increased, and the required minimum pressure in the clamping remains intact even if component deformations occur.
- To the fluid-conducting connection between the space 48 and the diaphragm rupture sensor ensure the intermediate ring or the intermediate layer 50 as Fabric formed.
- the diaphragm rupture sensor registers the through the Membrane fracture in the space 48 entering liquid, which by the Tissue gaps penetrate through to the membrane rupture sensor.
- 32 denotes the center of the membrane 10, which at the same time is to be regarded as an axis of rotational symmetry.
- the elastic component can be used to achieve the desired elasticity compensation also in the form of at least one or more axially effective profile rings be trained.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Membranpumpe mit hydraulisch angetriebener Membran
gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a diaphragm pump with a hydraulically driven membrane
according to the preamble of
Wachsende Umweltschutzforderungen verbunden mit strengen Gesetzesauflagen können künftig meist nur mit hermetisch dichten Prozeßanlagen erfüllt werden. Leckfreie Fluidarbeitsmaschinen, wie beispielsweise Pumpen und Verdichter, sind dabei von großer Bedeutung. Besonders für die Förderung toxischer, gefährlicher, belästigender, empfindlicher, abrasiver, korrosiver Fluide sowie für aseptische Bedingungen sind Membranpumpen eine optimale Lösung. Die Membran als zentrales Element erfüllt die Doppelfunktion als statische Dichtung und Verdränger in Form einer elastischen Förderraumwand. Die statische Membrandichtung ist die Grundlage für die hermetische Dichtheit von Membranpumpen. Die Membran überträgt ferner die oszillierende Hubbewegung eines Antriebs auf das zu fördernde Fluid, wodurch nicht nur die pulsierende Förderung, sondern auch eine Interaktion mit den Fluidmassen im Rohrleitungssystem zustande kommt. Bei Membranpumpen mit hydraulischem Membranantrieb wird die oszillierende Bewegung eines Antriebsorgans über eine Hydraulikvorlage, welche ein Hydraulikfluid umfaßt, auf die Membran übertragen. Die hydraulisch angetriebene Membran arbeitet stets druckausgeglichen und muß nur Auslenkungsbeanspruchungen ertragen. Growing environmental requirements combined with strict legal requirements can mostly only be fulfilled with hermetically sealed process systems in the future. Leak-free fluid working machines such as pumps and compressors are of great importance. Especially for the promotion of toxic, dangerous, annoying, sensitive, abrasive, corrosive fluids as well as for aseptic conditions diaphragm pumps are an optimal solution. The membrane as the central Element fulfills the double function as a static seal and displacer in Form of an elastic pumping chamber wall. The static membrane seal is the Basis for the hermetic tightness of diaphragm pumps. The membrane also transfers the oscillating stroke movement of a drive to the one to be conveyed Fluid, which not only stimulates pulsation, but also interaction comes about with the fluid masses in the piping system. For diaphragm pumps with hydraulic diaphragm drive, the oscillating movement becomes a Drive element via a hydraulic master, which comprises a hydraulic fluid, transferred to the membrane. The hydraulically driven membrane works always pressure balanced and only has to endure deflection stresses.
In der Membranpumpentechnik hat sich PTFE (Polytetrafluorethylen) wegen seiner hervorragenden chemischen Beständigkeit und der guten physikalischen Eigenschaften zum Standardmaterial für Membranen entwickelt. Übliche Membrankonstruktionen sind reine PTFE-Membranen mit rotationssymmetrischer Wellenkontur oder flacher Kontur sowie PTFE als Schutzschicht auf Elastomermembranen.In diaphragm pump technology, PTFE (polytetrafluoroethylene) has become popular because of its excellent chemical resistance and good physical properties developed as the standard material for membranes. Usual membrane constructions are pure PTFE membranes with a rotationally symmetrical shaft contour or flat contour and PTFE as a protective layer on elastomer membranes.
Die Grenze für die Verwendung von PTFE als Membran für Membranpumpen liegt derzeit bei einem Förderdruck von 350 bar und einer Temperatur von 150° C. Die Gründe für diese Grenzen sind die darüber hinaus nicht mehr ausreichende Kaltflußfestigkeit und Dichtpressung des PTFE in der Membraneinspannung. Mit konstruktiven Maßnahmen, z.B. durch eine geeignete Rillenstruktur, ist es gelungen, dem Kaltfluß in Grenzen entgegenzuwirken. Die Rillung behindert das Fließen des Membranwerkstoffes aus der Membraneinspannung. Dadurch läßt sich die Fließgrenze in der Membraneinspannung auf Werte weit oberhalb der Streckspannung aus dem Zugversuch anheben. Erst dadurch ist es gelungen, eine sichere Abdichtung bei 350 bar zu erzielen.The limit for the use of PTFE as a membrane for membrane pumps is currently at a delivery pressure of 350 bar and a temperature of 150 ° C The reasons for these limits are the insufficient cold flow resistance and sealing pressure of the PTFE in the membrane clamping. With constructive Measures, e.g. thanks to a suitable groove structure, to counteract the cold flow within limits. The creasing prevents the flow of the Membrane material from the membrane clamping. This allows the yield point in the membrane clamping to values far above the yield stress lift out of the tensile test. This is the only way to achieve a secure seal to achieve at 350 bar.
Oberhalb von 350 bar kommt noch die Tatsache hinzu, daß die Bauteile, zwischen denen die Membranen eingespannt sind, nämlich Pumpenkörper und Membranantriebsgehäuse, durch den Druckwechsel in der Pumpe deformiert werden, woraus ein gewisses "Atmen" in der Einspannung resultiert. Dieser Begriff "Atmen" bezeichnet eine im Betrieb der Membranpumpe ggf. periodisch immer wiederkehrende Abnahme des Anpreßdruckes zwischen dem Pumpendeckel und dem Pumpengehäuse im Einspannbereich der Membran. Mit zunehmendem Druck und zunehmender Baugröße nimmt das Atmen zu. Das Potential zum Elastizitätsausgleich durch die Membran ist jedoch sehr beschränkt, so daß dadurch ebenfalls eine Grenze für Druck und Baugrößensteigerung gegeben ist. Ferner ist der immer wiederkehrende Belastungswechsel der Membran durch das Atmen eine starke mechanische Belastung bzw. dynamische Wechselbeanspruchung und führt nach entsprechender Zeit zu einer Ermüdung des Membranwerkstoffes und letztlich zu einer Zerstörung der Membran. Dieser Wirkmechanismus ist bisher in dieser.Form noch nicht erkannt worden. Above 350 bar there is also the fact that the components, between which the diaphragms are clamped in, namely pump body and diaphragm drive housing, are deformed by the pressure change in the pump, which results in a certain "breathing" in the tension. This term "breathing" denotes a periodically recurring periodically during operation of the diaphragm pump Decrease of the contact pressure between the pump cover and the Pump housing in the clamping area of the membrane. With increasing pressure and Breathing increases in size. The potential for elasticity compensation through the membrane, however, is very limited, so that it too there is a limit for pressure and size increase. Furthermore, it is always recurring changes in the stress of the membrane due to breathing strong mechanical load or dynamic alternating stress and leads to fatigue of the membrane material and ultimately to destruction of the membrane. This mechanism of action is currently in this form has not yet been recognized.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Membranpumpe der o.g. Art zur Verfügung zu stellen, welche die o.g. Nachteile beseitigt und auch bei höheren Förderdrücken und höherer Betriebstemperatur bei langer Standzeit der Membran einsetzbar ist. Gleichzeitig soll dem negativen Effekt des "Atmens" des Pumpenkopfes im Bereich der Membraneinspannung entgegengewirkt werden.The invention is therefore based on the object of a diaphragm pump of the above. Art to make available which the above Disadvantages eliminated and even with higher ones Delivery pressures and higher operating temperature with long membrane life can be used. At the same time, the negative effect of "breathing" the pump head counteracted in the area of the membrane clamping.
Diese Aufgabe wird durch die Erfindung mit den im Anspruch 1 gekennzeichneten
Merkmalen gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den weiteren
Ansprüchen.This object is achieved by the invention characterized in that in
Bei der erfindungsgemäßen Membranpumpe ist im Einspannbereich zusätzlich wenigstens ein elastisches Bauteil vorgesehen, welches derart ausgebildet ist, daß es im Betrieb der Membranpumpe auftretende Verringerungen der Andruckkraft im Einspannbereich der Membran zwischen dem Pumpendeckel und dem Pumpengehäuse elastisch ausgleicht.In the diaphragm pump according to the invention there is an additional clamping area at least one elastic component is provided, which is designed in such a way that there are reductions in the pressure force occurring in the operation of the diaphragm pump in the clamping area of the membrane between the pump cover and the Pump housing compensates elastically.
Diese Ausbildung hat den Vorteil, daß die Membranpumpe auch für hohe Drücke, beispielsweise oberhalb 350 bar, und für höhere Temperaturen, beispielsweise über 150° C, geeignet ist, da in diesem Bereich auftretende Deformierungen von Pumpendeckel und Pumpengehäuse, welche zu einer Abnahme des Anpreßdrukkes im Einspannbereich führen würden, wirksam ausgeglichen sind. Gleichzeitig wird eine bei bestimmten Betriebsbedingungen evtl. nicht mehr ausreichende Kaltflußfestigkeit und Dichtpressung des Membranwerkstoffes kompensiert. Mit anderen Worten erhöht die erfindungsgemäße Anordnung die Elastizität der Membran im Einspannbereich, so daß die für die Dichtheit erforderliche Mindestpressung im Einspannbereich der Membran auch bei Verformung der im Einspannbereich beteiligten Bauteile erhalten bleibt. Das erfindungsgemäß vorgesehen elastische Bauteil hat hierbei keine Dichtfunktion, sondern dient der Kompensation von Schwankungen des Anpreßdruckes im Einspannbereich der Membran.This design has the advantage that the diaphragm pump is also suitable for high pressures, for example above 350 bar, and for higher temperatures, for example above 150 ° C, is suitable because deformations of Pump cover and pump housing, which lead to a decrease in the contact pressure lead in the clamping area, are effectively balanced. At the same time may become insufficient under certain operating conditions Cold flow resistance and sealing pressure of the membrane material are compensated. With In other words, the arrangement according to the invention increases the elasticity of the Membrane in the clamping area, so that the minimum pressure required for tightness in the clamping area of the membrane, even if it is deformed in the clamping area involved components is retained. That provided according to the invention elastic component has no sealing function, but serves to compensate of fluctuations in the contact pressure in the clamping area of the membrane.
Die Elastizitätsreserven eines Membranpaketes werden dadurch erhöht, daß die Membran zwei oder mehr Werkstofflagen umfaßt, wobei wenigstens ein elastisches Bauteil zwischen wenigstens zwei Lagen angeordnet ist. Hierbei ist das elastische Bauteil beispielsweise als elastische Zwischenlage oder als elastischer Zwischenring ausgebildet.The elastic reserves of a membrane package are increased in that the Diaphragm comprises two or more layers of material, at least one elastic Component is arranged between at least two layers. Here is the elastic Component, for example, as an elastic intermediate layer or as an elastic one Intermediate ring formed.
Um eine fluidleitende Verbindung zwischen dem Innenraum zwischen zwei Werkstofflagen der Membran und einem Membranbruchsensor sicherzustellen, ist das elastische Bauteil vorteilhafterweise als Gewebe ausgebildet.A fluid-conducting connection between the interior between two material layers the membrane and a diaphragm rupture sensor, that's it elastic component advantageously formed as a fabric.
Zum Ausgleich von Materialdeformierungen über den gesamten Einspannbereich in Umfangsrichtung erstreckt sich das elastische Bauteil über den gesamten Umfang der Membran.To compensate for material deformation over the entire clamping area in the circumferential direction, the elastic component extends over the entire circumference the membrane.
Das elastische Bauteil kann einseitig oder beidseits der Membran angeordnet sein.The elastic component can be arranged on one side or on both sides of the membrane his.
In einer bevorzugten Ausführungsform umfaßt das elastische Bauteil ein oder mehrere Elastomer-O-Ringe. Alternativ ist das elastische Bauteil als Lippendichtung ausgebildet.In a preferred embodiment, the elastic component comprises a or several elastomer o-rings. Alternatively, the elastic component is used as a lip seal educated.
Für eine einfache und schnelle Montage ist das elastische Bauteil ein integrales Teil der Membran.The elastic component is an integral part for simple and quick assembly Part of the membrane.
Zweckmäßigerweise ist die Membran aus PTFE oder PE oder alternativ aus einem Elastomer mit einer Schutzschicht aus PTFE hergestellt.The membrane is expediently made of PTFE or PE or alternatively of one Elastomer with a protective layer made of PTFE.
Die Erfindung wird im folgenden anhand der Zeichnung näher erläutert. Es zeigen:
- Fig. 1
- eine Membranpumpe im Schnitt,
- Fig. 2
- jeweils geschnitten im Detail eine erste Ausführungsform des erfindungsgemäßen elastischen Bauteils,
- Fig. 3
- eine zweite Ausführungsform des elastischen Bauteils,
- Fig. 4
- eine dritte Ausführungsform des elastischen Bauteils und
- Fig. 5
- eine vierte Ausführungsform des elastischen Bauteils.
- Fig. 1
- a membrane pump in section,
- Fig. 2
- each cut in detail a first embodiment of the elastic component according to the invention,
- Fig. 3
- a second embodiment of the elastic component,
- Fig. 4
- a third embodiment of the elastic member and
- Fig. 5
- a fourth embodiment of the elastic component.
Wie aus Fig. 1 ersichtlich, umfaßt die dargestellte Membranpumpe eine Membran
10, welche einen Förderraum 12 von einem Hydraulikraum 14 trennt. Als Antrieb
ist ein Kolben 16 vorgesehen, welcher im Betrieb um eine konstante Kolbenmittellage
oszilliert. Der Kolben 16 ist beispielhaft in der Position der Kolbenmittellage
dargestellt. Die oszillierende Bewegung des Kolbens 16 wird über eine Hydraulikflüssigkeit
im Hydraulikraum 14 auf die Membran 10 übertragen, welche eine entsprechende
oszillierende Bewegung um eine Mittellage herum ausführt. Auf diese
Weise wird von einer Saugseite 22 der Membranpumpe Fluid angesaugt und an
einer Förderseite 24 wieder abgegeben. Der Hydraulikraum 14 ist über ein druckbegrenzendes
Überdruckventil 26 und ein als Schnüffelventil ausgebildetes
Nachfüllventil 28 mit einem Hydraulikvorratsraum 30 verbunden. Ferner sind
Stützflächen 31, 33 vorgesehen, welche einen Arbeitsraum der Membran 10 seitlich
begrenzen. Hierbei bezeichnet 31 die hydraulikseitige Stützfläche und 33 die
förderraumseitige Stützfläche.1, the diaphragm pump shown comprises a
Die Membran 10 ist zwischen einem Pumpendeckel 34 und einem Pumpengehäuse
36 in einem vorbestimmten radialen Einspannbereich 38 eingespannt und wird
vorzugsweise durch Rillenstrukturen in den Pumpenbauteilen 34, 36 unterstützt.
Im Einspannbereich 38 ist zusätzlich zur Membran 10 ein elastisches Element 40
angeordnet, wie beispielhaft aus Fig. 2 bis 5 ersichtlich. Dieses elastische Element
40 gleicht ein "Atmen" im Einspannbereich 38 zu jedem Zeitpunkt aus und stellt
die für die Dichtheit erforderliche Pressung sicher. Dadurch ist auch bei hohen
Druck- und Temperaturbelastungen, welche über die zulässigen Belastungen bekannter
Membranpumpen hinausgehen, eine ausreichende Flächenpressung der
Membraneinspannung 38 gewährleistet.The
Die erfindungsgemäß ausgebildete Membraneinspannung 38 umfaßt somit einen
Elastizitätsausgleich, da im Einspannbereich 38 der Membran 10 das elastische
Bauteil 40 vorgesehen ist. The membrane clamping 38 designed according to the invention thus comprises one
Elasticity compensation, since in the clamping
Bei der in Fig. 2 dargestellten ersten Ausführungsform ist das elastische Bauteil
als Lippenring 40 ausgebildet, der einseitig oder, wie in Fig. 2 dargestellt, beidseitig
der Membran 10 im Einspannbereich 38 angeordnet ist.In the first embodiment shown in FIG. 2, the elastic component
formed as a
Bei der abgewandelten Ausführungsform gemäß Fig. 3 ist der Lippenring 40 einstückig
mit der Membran 10 ausgebildet, so daß mit Einsetzen der Membran 10
automatisch das elastische Bauteil 40 im Einspannbereich 38 angeordnet und
montiert ist.In the modified embodiment according to FIG. 3, the
Bei der weiteren Ausführungsform gemäß Fig. 4 ist das elastische Bauteil als Elastomer-O-Ring
42 ausgebildet und um den gesamten Umfang herum im Einspannbereich
38 angeordnet.In the further embodiment according to FIG. 4, the elastic component is an elastomer O-
Bei der Ausführungsform gemäß Fig. 5 weist die Membran 10 zwei Werkstofflagen
44, 46 auf, zwischen denen ein Zwischenraum 48 gebildet ist, der beispielsweise
in fluidleitender Verbindung mit einem nicht dargestellten Membranbruchsensor
steht. Das elastische Bauteil ist hierbei als Zwischenring oder Zwischenlage 50
ausgebildet und im Einspannbereich 38 zwischen den Werkstofflagen 44, 46 der
Membran 10 angeordnet. Auf diese Weise ist die Membran 10 sozusagen
"schwimmend" gelagert. Dadurch wird die Elastizitätsreserve des Membranpaketes
44, 46 gesteigert, und die erforderliche Mindestpressung in der Einspannung
bleibt auch bei eventuell auftretenden Bauteilverformungen erhalten. Um die
fluidleitende Verbindung zwischen dem Zwischenraum 48 und dem Membranbruchsensor
sicherzustellen, ist der Zwischenring bzw. die Zwischenlage 50 als
Gewebe ausgebildet. Der Membranbruchsensor registriert dann die durch den
Membranbruch in den Zwischenraum 48 eintretende Flüssigkeit, welche durch die
Gewebelücken hindurch bis zum Membranbruchsensor vordringt.In the embodiment according to FIG. 5, the
In den Fig. 2 - 5 bezeichnet jeweils 32 die Mitte der Membran 10, welche gleichzeitig
als Rotationssymmetrieachse anzusehen ist.2-5, 32 denotes the center of the
Zum Erzielen des erwünschten Elastizitätsausgleichs kann das elastische Bauteil auch in Form von wenigstens einem oder mehreren axial wirksamen Profilringen ausgebildet sein.The elastic component can be used to achieve the desired elasticity compensation also in the form of at least one or more axially effective profile rings be trained.
Claims (12)
dadurch gekennzeichnet, daß im Einspannbereich (38) zusätzlich wenigstens ein elastisches Bauteil (40; 42; 50) vorgesehen ist, welches derart ausgebildet ist, daß es im Betrieb der Membranpumpe auftretende Verringerungen der Andruckkraft im Einspannbereich (38) der Membran (10) zwischen dem Pumpendeckel (34) und dem Pumpengehäuse (36) elastisch ausgleicht.Diaphragm pump with a hydraulically driven diaphragm (10), which on a circumferential edge between a pump cover (34) and a pump housing (36) in a predetermined radial clamping area (38) and with a predetermined pressing force between the pump cover (34) and the pump housing (36) it is clamped that the pressure force is below the yield point of the membrane material,
characterized in that at least one elastic component (40; 42; 50) is additionally provided in the clamping area (38), which is designed in such a way that there are reductions in the contact pressure force occurring in the clamping area (38) of the membrane (10) during operation of the diaphragm pump the pump cover (34) and the pump housing (36) elastically compensates.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10012904 | 2000-03-16 | ||
| DE10012904A DE10012904B4 (en) | 2000-03-16 | 2000-03-16 | Membrane clamping with elasticity compensation |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1134415A2 true EP1134415A2 (en) | 2001-09-19 |
| EP1134415A3 EP1134415A3 (en) | 2002-07-17 |
| EP1134415B1 EP1134415B1 (en) | 2006-06-07 |
Family
ID=7635006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01105806A Expired - Lifetime EP1134415B1 (en) | 2000-03-16 | 2001-03-08 | Membrane clamping with elasticity compensation system |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6582206B2 (en) |
| EP (1) | EP1134415B1 (en) |
| DE (2) | DE10012904B4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012054394A3 (en) * | 2010-10-22 | 2012-07-12 | Oshkosh Corporation | Pump for vehicle suspension system |
| US10221055B2 (en) | 2016-04-08 | 2019-03-05 | Oshkosh Corporation | Leveling system for lift device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002500099A (en) * | 1998-01-09 | 2002-01-08 | エフエイスター、リミティド | Moving head, coating apparatus and method |
| US6913234B2 (en) * | 2002-10-07 | 2005-07-05 | Sondra Weiss | Rod clamp |
| US6899530B2 (en) * | 2002-10-31 | 2005-05-31 | Wanner Engineering, Inc. | Diaphragm pump with a transfer chamber vent with a longitudinal notch on the piston cylinder |
| US7090474B2 (en) * | 2003-05-16 | 2006-08-15 | Wanner Engineering, Inc. | Diaphragm pump with overfill limiter |
| US8454324B2 (en) * | 2004-03-18 | 2013-06-04 | Precision Dispensing Systems Limited | Pump |
| NZ531822A (en) * | 2004-03-18 | 2007-08-31 | Prec Dispensing Systems Ltd | A membrane pump |
| DE102009023012A1 (en) * | 2009-05-28 | 2010-12-16 | G.S. Anderson Gmbh | Diaphragm valve membrane |
| GB0915327D0 (en) * | 2009-09-03 | 2009-10-07 | Quanta Fluid Solution Ltd | Pump |
| EP2531729B1 (en) * | 2010-02-02 | 2020-03-04 | Dajustco Ip Holdings Inc. | Diaphragm pump with hydraulic fluid control system |
| US9422850B2 (en) | 2011-08-22 | 2016-08-23 | Cummins Emission Solutions, Inc. | Urea injection systems valves |
| GB201305755D0 (en) | 2013-03-28 | 2013-05-15 | Quanta Fluid Solutions Ltd | Re-Use of a Hemodialysis Cartridge |
| GB201409796D0 (en) | 2014-06-02 | 2014-07-16 | Quanta Fluid Solutions Ltd | Method of heat sanitization of a haemodialysis water circuit using a calculated dose |
| US9964106B2 (en) | 2014-11-04 | 2018-05-08 | Wanner Engineering, Inc. | Diaphragm pump with dual spring overfill limiter |
| DK201570293A1 (en) * | 2015-05-19 | 2016-12-12 | Nel Hydrogen As | Diaphragm compressor with an oblong shaped chamber |
| GB201523104D0 (en) | 2015-12-30 | 2016-02-10 | Quanta Fluid Solutions Ltd | Dialysis machine |
| US10920763B2 (en) | 2016-09-01 | 2021-02-16 | Wanner Engineering, Inc. | Diaphragm with edge seal |
| GB201622119D0 (en) | 2016-12-23 | 2017-02-08 | Quanta Dialysis Tech Ltd | Improved valve leak detection system |
| AU2019255317B2 (en) | 2018-04-18 | 2023-08-10 | Wanner Engineering, Inc. | Device for protecting a diaphragm pump from pressure differential |
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|---|---|---|---|---|
| FR1373780A (en) * | 1963-08-19 | 1964-10-02 | Improvements to diaphragm pumps | |
| DE1503429A1 (en) * | 1963-04-26 | 1969-04-03 | Andreas Hofer Hochdruck Appbau | Sealing ring for extra high pressure compressor with diaphragm actuation |
| DE2620228A1 (en) * | 1976-05-07 | 1977-11-10 | Bran & Luebbe | Hydraulically actuated triple diaphragm pump - has middle diaphragm slots connected to liq. filled duct with resilient seal as rupture indicator |
| EP0320091A1 (en) * | 1987-11-13 | 1989-06-14 | Plf Acquisition Subsidiary Inc. | Apparatus and method for sensing diaphragm failures in reciprocating pumps |
| DE4143371A1 (en) * | 1991-11-08 | 1993-05-13 | Almatec Tech Innovationen Gmbh | Membrane for double membrane pump - has oppositely placed bulges one of which carries tensioning ring in groove |
| US5860793A (en) * | 1995-12-01 | 1999-01-19 | Pulsafeeder, Inc. | Diaphragm metering pump with push to prime air bleeder valve |
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|---|---|---|---|---|
| US2242582A (en) * | 1938-09-29 | 1941-05-20 | Leo L Williams | Fuel pump |
| US4275997A (en) * | 1979-08-09 | 1981-06-30 | Parker-Hannifin Corporation | Hydraulic pump with proportional pressure controller |
| EP0055467B1 (en) * | 1980-12-29 | 1984-12-05 | LEWA Herbert Ott GmbH + Co. | Diaphragm pump with a pressure relieved diaphragm |
| US4791805A (en) * | 1985-06-07 | 1988-12-20 | Expertek, Inc. | Fuel tank leak detection apparatus |
| ATE50005T1 (en) * | 1985-11-20 | 1990-02-15 | Schweizerische Viscose | PROCESS FOR MAKING A POLYESTER-POY WEFT. |
| US4741360A (en) * | 1987-09-14 | 1988-05-03 | Tom Mcguane Industries, Inc. | Fuel pressure regulator |
| US5062770A (en) * | 1989-08-11 | 1991-11-05 | Systems Chemistry, Inc. | Fluid pumping apparatus and system with leak detection and containment |
| DE4018464A1 (en) * | 1990-06-08 | 1991-12-12 | Ott Kg Lewa | DIAPHRAGM FOR A HYDRAULICALLY DRIVED DIAPHRAGM PUMP |
| US5217797A (en) * | 1992-02-19 | 1993-06-08 | W. L. Gore & Associates, Inc. | Chemically resistant diaphragm |
| US5279504A (en) * | 1992-11-02 | 1994-01-18 | Williams James F | Multi-diaphragm metering pump |
| JPH074359A (en) * | 1993-05-06 | 1995-01-10 | Almatec Technische Innovationen Gmbh | Diaphragm for pump |
| US5560279A (en) * | 1995-03-16 | 1996-10-01 | W. L. Gore & Associates, Inc. | Pre-failure sensing diaphragm |
| US6173959B1 (en) * | 1996-02-14 | 2001-01-16 | Mikuni Adec Corporation | Diaphragm-holding synthetic resin assembly |
| JP3083275B2 (en) * | 1997-09-18 | 2000-09-04 | 株式会社ワイ・テイ・エス | Double diaphragm pump |
-
2000
- 2000-03-16 DE DE10012904A patent/DE10012904B4/en not_active Expired - Fee Related
-
2001
- 2001-03-08 EP EP01105806A patent/EP1134415B1/en not_active Expired - Lifetime
- 2001-03-08 DE DE50109995T patent/DE50109995D1/en not_active Expired - Fee Related
- 2001-03-15 US US09/808,108 patent/US6582206B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1503429A1 (en) * | 1963-04-26 | 1969-04-03 | Andreas Hofer Hochdruck Appbau | Sealing ring for extra high pressure compressor with diaphragm actuation |
| FR1373780A (en) * | 1963-08-19 | 1964-10-02 | Improvements to diaphragm pumps | |
| DE2620228A1 (en) * | 1976-05-07 | 1977-11-10 | Bran & Luebbe | Hydraulically actuated triple diaphragm pump - has middle diaphragm slots connected to liq. filled duct with resilient seal as rupture indicator |
| EP0320091A1 (en) * | 1987-11-13 | 1989-06-14 | Plf Acquisition Subsidiary Inc. | Apparatus and method for sensing diaphragm failures in reciprocating pumps |
| DE4143371A1 (en) * | 1991-11-08 | 1993-05-13 | Almatec Tech Innovationen Gmbh | Membrane for double membrane pump - has oppositely placed bulges one of which carries tensioning ring in groove |
| US5860793A (en) * | 1995-12-01 | 1999-01-19 | Pulsafeeder, Inc. | Diaphragm metering pump with push to prime air bleeder valve |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012054394A3 (en) * | 2010-10-22 | 2012-07-12 | Oshkosh Corporation | Pump for vehicle suspension system |
| US8596648B2 (en) | 2010-10-22 | 2013-12-03 | Oshkosh Corporation | Pump for vehicle suspension system |
| US8821130B2 (en) | 2010-10-22 | 2014-09-02 | Oshkosh Corporation | Pump for vehicle suspension system |
| US9581153B2 (en) | 2010-10-22 | 2017-02-28 | Oshkosh Corporation | Pump for vehicle suspension system |
| US10221055B2 (en) | 2016-04-08 | 2019-03-05 | Oshkosh Corporation | Leveling system for lift device |
| US10934145B2 (en) | 2016-04-08 | 2021-03-02 | Oshkosh Corporation | Leveling system for lift device |
| US11565920B2 (en) | 2016-04-08 | 2023-01-31 | Oshkosh Corporation | Leveling system for lift device |
| US11679967B2 (en) | 2016-04-08 | 2023-06-20 | Oshkosh Corporation | Leveling system for lift device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10012904A1 (en) | 2001-10-04 |
| US6582206B2 (en) | 2003-06-24 |
| DE50109995D1 (en) | 2006-07-20 |
| DE10012904B4 (en) | 2004-08-12 |
| EP1134415A3 (en) | 2002-07-17 |
| US20010043872A1 (en) | 2001-11-22 |
| EP1134415B1 (en) | 2006-06-07 |
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