EP1134415B1 - Membrane clamping with elasticity compensation system - Google Patents
Membrane clamping with elasticity compensation system Download PDFInfo
- Publication number
- EP1134415B1 EP1134415B1 EP01105806A EP01105806A EP1134415B1 EP 1134415 B1 EP1134415 B1 EP 1134415B1 EP 01105806 A EP01105806 A EP 01105806A EP 01105806 A EP01105806 A EP 01105806A EP 1134415 B1 EP1134415 B1 EP 1134415B1
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- EP
- European Patent Office
- Prior art keywords
- membrane
- pump
- diaphragm
- cover
- pump according
- 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
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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
- F04B43/02—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 hydraulically driven diaphragm according to the preamble of claim 1.
- the membrane as a central element fulfills the dual function as a static seal and displacer in the form of an elastic delivery chamber wall.
- the static diaphragm seal is the basis for the hermetic tightness of diaphragm pumps.
- the membrane also transmits the oscillating stroke movement of a drive to the fluid to be pumped, whereby not only the pulsating promotion, but also an interaction with the fluid masses in the piping system comes about.
- membrane pumps with hydraulic diaphragm drive the oscillating movement of a drive member via a hydraulic reservoir, which comprises a hydraulic fluid, transmitted to the membrane.
- the hydraulically driven diaphragm always works pressure-balanced and only has to withstand deflection stresses.
- PTFE polytetrafluoroethylene
- Conventional membrane constructions are pure PTFE membranes with rotationally symmetrical wave contour or flat contour and PTFE as a protective layer on elastomer membranes.
- PTFE as a diaphragm for diaphragm pumps
- the reasons for these limits are beyond the sufficient cold-flow strength and sealing pressure of the PTFE in the Membraneinposition.
- design measures e.g. By a suitable groove structure, it has been possible to counteract the cold flow within limits. The crease hinders the flow of the membrane material from the membrane clamping. As a result, the yield strength in the membrane clamping can be raised to values far above the yield stress from the tensile test. Only then was it possible to achieve a secure seal at 350 bar.
- a membrane design is provided with an edge-side, elastic annular bead which, when the diaphragm is clamped, engages in a corresponding annular groove of the pump body.
- a sealing concept is suitable for low pressures of about 10 bar and is thus limited to the pressures of the usual diaphragm pumps described in this context.
- Another diaphragm pump according to the preamble of claim 1 is known from FR 1 373 780 A.
- a cavity-forming fabric layer is provided as the membrane intermediate layer, which can be used as an alternative to a membrane with radial slots.
- This tissue layer is intended to establish a connection from the membrane interspace to the outside in order to realize a membrane rupture signaling.
- the invention is therefore based on the object, a membrane pump og. To make available type, which the o.g. Disadvantages eliminated and can also be used at higher delivery pressures and higher operating temperature with a long service life of the membrane. At the same time, the negative effect of "breathing" of the pump head in the region of the membrane clamping should be counteracted.
- the elastic member comprises at least one axially effective profile ring, which is designed as a lip seal and elastically compensates for reductions in the pressure force occurring in the clamping region of the membrane between the pump cover and the pump housing during operation of the diaphragm pump.
- the diaphragm pump is also suitable for high pressures, for example above 350 bar, and for higher temperatures, for example above 150 ° C, as occurring in this area deformations of the pump cover and pump housing, resulting in a decrease of the contact pressure in the clamping area would be effectively balanced.
- a cold-flow strength and sealing pressure of the diaphragm material which may no longer be sufficient, will be compensated.
- the arrangement according to the invention increases the elasticity of the membrane in the clamping region, so that the minimum pressure required for the tightness in the clamping region of the membrane is maintained even when the components involved in the clamping region are deformed.
- the elastic component provided according to the invention in this case has no sealing function, but serves to compensate for fluctuations in the contact pressure in the clamping region of the membrane.
- the elastic member may extend over the entire circumference of the membrane. It may also be arranged on one side or on both sides of the membrane.
- the elastic member is an integral part of the membrane.
- the membrane is made of PTFE or PE or alternatively of an elastomer with a protective layer of PTFE.
- the illustrated diaphragm pump comprises a membrane 10, which separates a delivery chamber 12 from a hydraulic chamber 14.
- a piston 16 As a drive a piston 16 is provided, which oscillates in operation by a constant piston center position.
- the piston 16 is exemplified in the position of the piston center position.
- the oscillating movement of the piston 16 is transmitted via a hydraulic fluid in the hydraulic chamber 14 to the diaphragm 10, which performs a corresponding oscillating movement about a central position around. In this way, fluid is drawn in from a suction side 22 of the diaphragm pump and discharged again at a delivery side 24.
- the hydraulic chamber 14 is connected via a pressure-limiting pressure relief valve 26 and designed as a sniffer valve refill valve 28 with a hydraulic reservoir 30. Furthermore, support surfaces 31, 33 are provided, which limit a working space of the membrane 10 laterally. Here, 31 designates the hydraulic-side support surface and 33 the delivery-chamber-side support surface.
- the diaphragm 10 is clamped between a pump cover 34 and a pump housing 36 in a predetermined radial clamping area 38 and is preferably supported by groove structures in the pump components 34, 36.
- an elastic component 40 is arranged in addition to the membrane 10, as shown in more detail in FIGS. 2 and 3. This elastic member 40 compensates for "breathing" in the chucking portion 38 at all times and ensures the pressure required for tightness. As a result, a sufficient surface pressure of the membrane clamping 38 is ensured even at high pressure and temperature loads, which go beyond the allowable loads of known diaphragm pumps.
- the inventively embodied Membraneinput 38 thus includes a balance of elasticity, since in the clamping region 38 of the membrane 10, the elastic member 40 is provided.
- the elastic member is formed as a lip ring 40 which is disposed on both sides of the membrane 10 in the clamping portion 38.
- the lip ring 40 is arranged on one side on the membrane 10 in the clamping region 38 and integrally with formed of the membrane 10, so that when inserting the membrane 10, the elastic member 40 is automatically arranged and mounted in the clamping area 38.
- FIGS. 2 and 3 designates the center of the membrane 10, which at the same time is to be regarded as a rotational symmetry axis.
- the desired elasticity compensation is thus achieved by the formation of the elastic member in the form of at least one axially effective profile ring.
Description
Die Erfindung betrifft eine Membranpumpe mit hydraulisch angetriebener Membran gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a diaphragm pump with hydraulically driven diaphragm according to the preamble of claim 1.
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 protection requirements combined with strict legal requirements can be met in the future only with hermetically sealed process equipment. Leak-free fluid working machines, such as pumps and compressors, are of great importance. Especially for the pumping of toxic, dangerous, annoying, sensitive, abrasive, corrosive fluids as well as for aseptic conditions diaphragm pumps are an optimal solution. The membrane as a central element fulfills the dual function as a static seal and displacer in the form of an elastic delivery chamber wall. The static diaphragm seal is the basis for the hermetic tightness of diaphragm pumps. The membrane also transmits the oscillating stroke movement of a drive to the fluid to be pumped, whereby not only the pulsating promotion, but also an interaction with the fluid masses in the piping system comes about. In membrane pumps with hydraulic diaphragm drive, the oscillating movement of a drive member via a hydraulic reservoir, which comprises a hydraulic fluid, transmitted to the membrane. The hydraulically driven diaphragm always works pressure-balanced and only has to withstand 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 membrane pump technology, PTFE (polytetrafluoroethylene) has become the standard material for membranes because of its excellent chemical resistance and good physical properties. Conventional membrane constructions are pure PTFE membranes with rotationally symmetrical wave 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 diaphragm for diaphragm pumps is currently at a delivery pressure of 350 bar and a temperature of 150 ° C. The reasons for these limits are beyond the sufficient cold-flow strength and sealing pressure of the PTFE in the Membraneinspannung. With design measures, e.g. By a suitable groove structure, it has been possible to counteract the cold flow within limits. The crease hinders the flow of the membrane material from the membrane clamping. As a result, the yield strength in the membrane clamping can be raised to values far above the yield stress from the tensile test. Only then was it possible to achieve a secure seal 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, the fact remains that the components between which the membranes are clamped, namely the pump body and the diaphragm drive housing, are deformed by the pressure change in the pump, resulting in a certain "breathing" in the clamping. This term "breathing" refers to a possibly recurring in operation of the diaphragm pump periodically decreasing the contact pressure between the pump cover and the pump housing in the clamping region of the membrane. With increasing pressure and increasing size, breathing increases. However, the potential for elasticity compensation through the membrane is very limited, so that this is also a limit for pressure and size increase is given. Furthermore, the recurrent load change of the membrane by breathing a strong mechanical stress or dynamic cycling and leads after a certain time to fatigue of the membrane material and ultimately to a destruction of the membrane. This mechanism of action has not yet been recognized in this form.
Bei einer bekannten Membranpumpe (US-A 5 860 793) ist eine Membranausführung mit einem randseitigen, elastischen Ringwulst vorgesehen, der bei eingespannter Membran in eine entsprechende Ringnut des Pumpenkörpers eingreift. Ein derartiges Dichtungskonzept eignet sich jedoch für niedrige Drücke von ca. 10 bar und ist damit für die Drücke der in diesem Zusammenhang beschriebenen üblichen Membranpumpen begrenzt.In a known membrane pump (US Pat. No. 5,860,793), a membrane design is provided with an edge-side, elastic annular bead which, when the diaphragm is clamped, engages in a corresponding annular groove of the pump body. However, such a sealing concept is suitable for low pressures of about 10 bar and is thus limited to the pressures of the usual diaphragm pumps described in this context.
Eine weitere Membranpumpe gemäß dem Oberbegriff des Anspruchs 1 ist aus der FR 1 373 780 A bekannt.Another diaphragm pump according to the preamble of claim 1 is known from FR 1 373 780 A.
Bei einer weiteren bekannten Membranpumpe (DE 26 20 228 A) ist als Membranzwischenlage eine Hohlraum bildende Gewebeschicht vorgesehen, die als Alternative zu einer Membran mit radialen Schlitzen einsetzbar ist. Diese Gewebeschicht soll eine Verbindung vom Membranzwischenraum nach außen herstellen, um eine Membranbruchsignalisierung zu realisieren.In another known membrane pump (DE 26 20 228 A), a cavity-forming fabric layer is provided as the membrane intermediate layer, which can be used as an alternative to a membrane with radial slots. This tissue layer is intended to establish a connection from the membrane interspace to the outside in order to realize a membrane rupture signaling.
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, a membrane pump og. To make available type, which the o.g. Disadvantages eliminated and can also be used at higher delivery pressures and higher operating temperature with a long service life of the membrane. At the same time, the negative effect of "breathing" of the pump head in the region of the membrane clamping should be counteracted.
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 with the features characterized in claim 1. Advantageous embodiments emerge from the other claims.
Bei der erfindungsgemäßen Membranpumpe umfasst das elastische Bauteil wenigstens einen axial wirksamen Profilring, der als Lippendichtung ausgebildet ist und 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, the elastic member comprises at least one axially effective profile ring, which is designed as a lip seal and elastically compensates for reductions in the pressure force occurring in the clamping region of the membrane between the pump cover and the pump housing during operation of the diaphragm pump.
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 Anpreßdruckes 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.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, as occurring in this area deformations of the pump cover and pump housing, resulting in a decrease of the contact pressure in the clamping area would be effectively balanced. simultaneously In some operating conditions, a cold-flow strength and sealing pressure of the diaphragm material, which may no longer be sufficient, will be compensated. In other words, the arrangement according to the invention increases the elasticity of the membrane in the clamping region, so that the minimum pressure required for the tightness in the clamping region of the membrane is maintained even when the components involved in the clamping region are deformed.
Das erfindungsgemäß vorgesehen elastische Bauteil hat hierbei keine Dichtfunktion, sondern dient der Kompensation von Schwankungen des Anpreßdruckes im Einspannbereich der Membran.The elastic component provided according to the invention in this case has no sealing function, but serves to compensate for fluctuations in the contact pressure in the clamping region of the membrane.
Zum Ausgleich von Materialdeformierungen über den gesamten Einspannbereich in Umfangsrichtung kann sich das elastische Bauteil über den gesamten Umfang der Membran erstrecken. Auch kann es einseitig oder beidseits der Membran angeordnet sein.To compensate for material deformations over the entire clamping area in the circumferential direction, the elastic member may extend over the entire circumference of the membrane. It may also be arranged on one side or on both sides of the membrane.
Für eine einfache und schnelle Montage ist das elastische Bauteil ein integrales Teil der Membran.For easy and quick assembly, the elastic member is an integral part of the membrane.
Zweckmäßigerweise ist die Membran aus PTFE oder PE oder alternativ aus einem Elastomer mit einer Schutzschicht aus PTFE hergestellt.Conveniently, the membrane is made of PTFE or PE or alternatively of an elastomer with a protective layer 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 und
- Fig. 3
- eine zweite Ausführungsform des elastischen Bauteils.
- Fig. 1
- a membrane pump in section,
- Fig. 2
- each cut in detail a first embodiment of the elastic member according to the invention and
- Fig. 3
- a second embodiment of the elastic member.
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.As can be seen from FIG. 1, the illustrated diaphragm pump 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 Bauteil 40 angeordnet, wie näher aus Fig. 2 und 3 ersichtlich. Dieses elastische Bauteil 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 inventively embodied
Bei der in Fig. 2 dargestellten ersten Ausführungsform ist das elastische Bauteil als Lippenring 40 ausgebildet, der beidseitig der Membran 10 im Einspannbereich 38 angeordnet ist.In the first embodiment shown in Fig. 2, the elastic member is formed as a
Bei der abgewandelten Ausführungsform gemäß Fig. 3 ist der Lippenring 40 einseitig an der Membran 10 im Einspannbereich 38 angeordnet und 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
In den Fig. 2 und 3 bezeichnet jeweils 32 die Mitte der Membran 10, welche gleichzeitig als Rotationssymmetrieachse anzusehen ist.In FIGS. 2 and 3, 32 designates the center of the
Insgesamt ist damit durch die Ausbildung des elastischen Bauteils in Form von wenigstens einem axial wirksamen Profilring der erwünschte Elastizitätsausgleich erzielt.Overall, the desired elasticity compensation is thus achieved by the formation of the elastic member in the form of at least one axially effective profile ring.
Claims (6)
- Membrane pump comprising a hydraulically actuated membrane (10) which is clamped on a circumferential edge between a cover (34) of the pump and a housing (36) of the pump within a predetermined radial clamping area (38) provided with a predetermined pressure between the cover (34) of the pump and the housing (36) of the pump such that the force by which the membrane is clamped is below the tensile strength of the membrane material, wherein the clamping area (38) is additionally provided with at least one elastic structural part (40), characterized in that the elastic structural part comprises at least one axially effective profile ring forming a lip gasket elastically compensating the reduction of the pressure force within the clamping area (38) of the membrane (10) between the cover (34) of the pump and the housing (36) of the pump during operation of the membrane pump.
- Membrane pump according to claim 1, characterized in that the lip gasket (40) extends circumferentially over the entire circumference of the membrane (10).
- Membrane pump according to claim 1 or 2, characterized in that the lip gasket (40) is positioned on both sides of the membrane (10).
- Membrane pump according to one of the preceding claims, characterized in that the lip gasket (40) is integral with the membrane (10).
- Membrane pump according to one of the preceding claims, characterized in that the membrane (10) is manufactured of PTFE or PE.
- Membrane pump according to one of the preceding claims, characterized in that the membrane (10) is comprised of Elastomer provided with a protective cover of PTFE.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10012904A DE10012904B4 (en) | 2000-03-16 | 2000-03-16 | Membrane clamping with elasticity compensation |
| DE10012904 | 2000-03-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1134415A2 EP1134415A2 (en) | 2001-09-19 |
| EP1134415A3 EP1134415A3 (en) | 2002-07-17 |
| EP1134415B1 true 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) |
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| 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 |
| US9850889B2 (en) * | 2010-02-02 | 2017-12-26 | Dajustco Ip Holdings Inc. | Hydraulic fluid control system for a diaphragm pump |
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| 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 |
| US9890024B2 (en) | 2016-04-08 | 2018-02-13 | Oshkosh Corporation | Leveling system for lift device |
| 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 |
| JP7346445B2 (en) | 2018-04-18 | 2023-09-19 | ワナー・エンジニアリング・インコーポレーテッド | Device for protecting diaphragm pumps from pressure differences |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2242582A (en) * | 1938-09-29 | 1941-05-20 | Leo L Williams | Fuel pump |
| 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 |
| US4275997A (en) * | 1979-08-09 | 1981-06-30 | Parker-Hannifin Corporation | Hydraulic pump with proportional pressure controller |
| ATE10670T1 (en) * | 1980-12-29 | 1984-12-15 | Lewa Herbert Ott Gmbh + Co. | DIAPHRAGM PUMP WITH RELIEVED CLAMPED 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 |
| US4781535A (en) * | 1987-11-13 | 1988-11-01 | Pulsafeeder, Inc. | Apparatus and method for sensing diaphragm failures in reciprocating pumps |
| 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 |
| DE4143371C2 (en) * | 1991-11-08 | 1994-01-27 | Almatec Tech Innovationen Gmbh | Diaphragm for a 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 |
| US5647733A (en) * | 1995-12-01 | 1997-07-15 | Pulsafeeder Inc. | Diaphragm metering pump having modular construction |
| EP0821153B1 (en) * | 1996-02-14 | 2003-09-17 | Mikuni 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
Also Published As
| Publication number | Publication date |
|---|---|
| DE50109995D1 (en) | 2006-07-20 |
| EP1134415A3 (en) | 2002-07-17 |
| US6582206B2 (en) | 2003-06-24 |
| DE10012904B4 (en) | 2004-08-12 |
| EP1134415A2 (en) | 2001-09-19 |
| US20010043872A1 (en) | 2001-11-22 |
| DE10012904A1 (en) | 2001-10-04 |
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