EP1611354A1 - Reciprocating piston engine - Google Patents

Reciprocating piston engine

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Publication number
EP1611354A1
EP1611354A1 EP04710821A EP04710821A EP1611354A1 EP 1611354 A1 EP1611354 A1 EP 1611354A1 EP 04710821 A EP04710821 A EP 04710821A EP 04710821 A EP04710821 A EP 04710821A EP 1611354 A1 EP1611354 A1 EP 1611354A1
Authority
EP
European Patent Office
Prior art keywords
membrane
reciprocating piston
diaphragm
working
cross
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.)
Withdrawn
Application number
EP04710821A
Other languages
German (de)
French (fr)
Inventor
Erich Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KNF Neuberger GmbH
Original Assignee
KNF Neuberger GmbH
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Filing date
Publication date
Application filed by KNF Neuberger GmbH filed Critical KNF Neuberger GmbH
Publication of EP1611354A1 publication Critical patent/EP1611354A1/en
Withdrawn legal-status Critical Current

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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
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members

Definitions

  • the invention relates to a reciprocating piston machine with at least one working diaphragm and / or at least one additional diaphragm made of elastomeric material and with an oscillating lifting drive, which engages a central area of the membrane, with a peripheral edge area clamped in the reciprocating machine between the central area of the diaphragm and the peripheral area clamped in the reciprocating machine Pump movements deforming membrane area is provided.
  • a reciprocating piston machine of the type mentioned at the outset is known, which is designed as a diaphragm pump.
  • the diaphragm pump known from DE 198 34 468 C1 has a working diaphragm, which serves as a reciprocating piston and is made of elastomeric material and is clamped with its peripheral edge region in the pump housing.
  • An oscillating linear actuator acts on the central area of the working diaphragm, causing the working diaphragm to pump.
  • a rigid mandrel is molded into the central area of the working diaphragm, which is connected to a connecting rod of the pump drive.
  • a likewise rigid support element is elastically connected to the mandrel, which stiffens the working membrane and limits the membrane or flex area deforming during the pumping movements to a comparatively small ring zone of the membrane.
  • Another proposal for solving the task outlined above provides that the membrane cross-section of the working and / or additional membrane in its deformable membrane area is dimensioned such that approximately the same stresses or elastic deformations occur in the near-surface zones of the deformable membrane area during the pumping movements.
  • An additional, also independently worthy of protection, proposal to solve the above-mentioned problem also provides that the working and / or additional membrane has at least two cantilever-shaped ring zones in its deformable membrane area, which in a cross-sectional narrowing of the Membrane merge into each other, and that the membrane cross-section in the ring zones widens from the cross-sectional constriction.
  • the working and / or additional membrane of the reciprocating piston machine according to the invention is dimensioned in its deformable membrane area such that during pumping movements in the zones near the surface of the membrane area deforming during pumping movements set approximately the same tensions or elastic deformations. Since partial stress peaks in the membrane area near the surface are avoided in the working and / or additional membrane of the reciprocating piston machine according to the invention, the geometric deformation required by the lifting movement of the working and / or additional membrane is not represented by two ring zones serving as hinges, but by two flowing curves, the curves of which Unification point, depending on the stroke position, may be located at a different point on the radial between the central region and the circumferential region clamped in the reciprocating piston machine.
  • the reciprocating machine according to the invention is distinguished by the long-lasting and low-noise mode of operation of its working and / or additional membranes.
  • the membrane cross section in the ring zones widens linearly at least in some areas.
  • a particularly advantageous embodiment according to the invention consists in that the cross-sectional constriction is arranged in the range from 0.6 to 0.8 of the diameter of the deformable membrane area.
  • the reciprocating piston machine is designed as a diaphragm pump, the high-speed working and / or additional diaphragm of which is regularly exposed to a particular load.
  • the working diaphragm of such a diaphragm pump can be designed as a shape or as a flat diaphragm. While a molded part connected to the connecting rod of the linear actuator is molded into the elastomeric material of the membrane in order to be able to adapt the upper side of the diaphragm facing the pump chamber to the cross-section of the pump chamber in such a way that the molded membrane completely fills the pump chamber at top dead center Flat diaphragm clamped in its central area between the upper end of the connecting rod and, on the upper side of the diaphragm facing the pump chamber, a thrust washer.
  • Fig. 1 shows a diaphragm pump in a partial longitudinal section in the region of its pump head having a working diaphragm
  • FIG. 2 shows the diaphragm pump from FIG. 1 in the detailed view indicated by dash-dotted lines in FIG. 1.
  • Fig. 1 a serving as a piston working diaphragm 1 of a piston pump designed as a diaphragm pump is shown in a partial cross section.
  • the working membrane 1 consists of an elastomeric material, into which a molded part 2 is molded. While the molded part 2, which forms the central region 3 of the diaphragm 1, is connected to an oscillating connecting rod 4 of a lifting drive (not shown further here), the peripheral edge region 5 of the diaphragm 1 is clamped in the pump head 6 of the reciprocating piston machine.
  • a membrane or flexing region M is provided which deforms during the oscillating pumping movements.
  • the membrane cross section of the working membrane 1 in its deformable membrane area M is dimensioned such that during the pumping movements in the surface near zones of the deformable membrane area M approximately the same stresses or elastic deformations arise.
  • the geometric deformation required by the lifting movement is not represented by two hinge ring zones, as is known in the case of previously known working or additional diaphragms, but by two curves flowing into one another, the joining point of which, depending on the lifting position, per se another location of the radial between the membrane center 3 and the clamping point 5 may be.
  • These curves result from the fact that the thickness of the elastomer used for the membrane 1 is dimensioned at every point of the membrane 1 in such a way that these two flowing curves come about when the membrane is deformed by the stroke.
  • the working membrane 1 has two cantilever-shaped ring zones 7, 8 , which merge into one another in the outer peripheral region of the movable membrane region M.
  • These cantilever-shaped ring zones 7, 8 are designed and dimensioned such that in the starting position of the working membrane 1 in each ring zone 7, 8 the stress permitted for the ring zones 7, 8 occurs evenly under the intended load.
  • the cantilever-shaped ring zones 7, 8 are characterized in that the membrane cross-section in these ring zones 7, 8 widens from the cross-sectional constriction 9 outwards (ring zone 8) or inwards (ring zone 7).
  • ring zone 8 the membrane cross section of the working membrane 1 in these ring zones 7, 8 is expanded linearly at least in some areas.
  • the cross-sectional constriction 9 is arranged in the range from 0.6 to 0.8 of the diameter of the deformable membrane region M and forms the intersection of the extensions of the ring-zone undersides defined by the ring zones 7, 8, which is approximately in the thinnest point of the cross-sectional constriction 9.
  • the diaphragm pump shown here is distinguished by the long-lasting and low-noise mode of operation of its working diaphragm 1.

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

Abstract

The invention relates to a reciprocating piston engine comprising at least one membrane (1) produced from an elastomeric material and an oscillating reciprocating drive that acts on a center zone (3) of the membrane (1). Between the center zone (3) of the membrane and its circumferential edge zone (5) a membrane zone (M) is provided that is deformed during the oscillating pumping movements. The inventive reciprocating piston engine is inter alia characterized in that the work and/or auxiliary membrane (1), in its deformable membrane zone, is provided with at least two cantilever-type annular zones (7, 8) that merge into each other in a reduction of cross-section (9) of the membrane (1) and in that the membrane cross-section, starting from the reduction of cross-section (9), enlarges in the annular zones (7, 8). The membrane of the inventive reciprocating piston engine is very durable and functions with little noise.

Description

Hubkolbenmaschine reciprocating engine
Die Erfindung betrifft eine Hubkolbenmaschine mit zumindest einer Arbeitsmembrane und/oder wenigstens einer Zusatzmembrane aus elastomerem Material sowie mit einem oszillierenden Hubantrieb, der an einem Zentralbereich der Membrane angreift, wobei zwischen dem Zentralbereich der Membrane und ihrem in der Hubkolbenmaschine eingespannten Umfangsrandbereich ein sich während der oszillierenden Pumpbewegungen verformender Membranbereich vorgesehen ist.The invention relates to a reciprocating piston machine with at least one working diaphragm and / or at least one additional diaphragm made of elastomeric material and with an oscillating lifting drive, which engages a central area of the membrane, with a peripheral edge area clamped in the reciprocating machine between the central area of the diaphragm and the peripheral area clamped in the reciprocating machine Pump movements deforming membrane area is provided.
Aus der DE 198 34 468 Cl ist bereits eine Hubkolbenmaschine der eingangs erwähnten Art bekannt, die als Membranpumpe ausgestaltet ist. Die aus DE 198 34 468 C1 vorbekannte Membranpumpe hat eine als Hubkolben dienende Arbeitsmembrane aus elastomerem Material, die mit ihrem Umfangsrandbereich im Pumpengehäuse eingespannt ist. Am Zentralbereich der Arbeitsmembrane greift ein oszillierender Hubantrieb an, der die Arbeitsmembrane in Pumpbewegungen versetzt. Dazu ist in den Zentralbereich der Arbeitsmembrane ein starrer Formkern eingeformt, der mit einer Pleuelstange des Pumpantriebs verbunden ist. An den Formkern ist ein ebenfalls starres Stützelement elastisch angebunden, dass die Arbeitsmembran aussteift und den sich während der Pumpbewegungen verformenden Membran- oder Walkbereich auf eine vergleichsweise kleine Ringzone der Membrane begrenzt.From DE 198 34 468 Cl a reciprocating piston machine of the type mentioned at the outset is known, which is designed as a diaphragm pump. The diaphragm pump known from DE 198 34 468 C1 has a working diaphragm, which serves as a reciprocating piston and is made of elastomeric material and is clamped with its peripheral edge region in the pump housing. An oscillating linear actuator acts on the central area of the working diaphragm, causing the working diaphragm to pump. For this purpose, a rigid mandrel is molded into the central area of the working diaphragm, which is connected to a connecting rod of the pump drive. A likewise rigid support element is elastically connected to the mandrel, which stiffens the working membrane and limits the membrane or flex area deforming during the pumping movements to a comparatively small ring zone of the membrane.
Bei den Arbeits- und/oder Zusatzmembranen vorbekannter Hubkolbenmaschinen ergeben sich durch die Pumpbewegungen regelmäßig zwei ringförmige Scharnierzonen, von denen eine in dem im Pumpengehäuse eingespannten Umfangsrandbereich und die andere am Innenumfang des Walkbereichs angeordnet ist . In diesen Scharnierzonen sind die Arbeits- und Zusatzmembranen einer erhöhten Belastung ausgesetzt, die zu Schädigungen des für die Membrane verwendeten Elastomers, zu Funktionsstörungen der Hubkolbenmaschine und zu einer erhöhten Geräuschbildung führen kann.In the case of the working and / or additional membranes of previously known reciprocating piston machines, the pump movements regularly result in two annular hinge zones, one of which is arranged in the peripheral edge region clamped in the pump housing and the other is arranged on the inner periphery of the flexing region. In these Hinge zones expose the working and additional membranes to an increased load, which can damage the elastomer used for the membrane, cause malfunctions in the reciprocating machine and lead to increased noise.
Es besteht daher insbesondere die Aufgabe, eine Hubkolbenmaschine der eingangs erwähnten Art zu schaffen, deren Arbeitsund/oder Zusatzmembrane sich durch eine lange Lebensdauer und eine sichere Funktionsweise auszeichnet.There is therefore in particular the task of creating a reciprocating piston machine of the type mentioned at the beginning, the working and / or additional membrane of which is characterized by a long service life and reliable operation.
Die erfindungsgemäße Lösung dieser Aufgabe besteht bei der Hubkolbenmaschine der eingangs erwähnten Art insbesondere darin, dass die durch den Hub unterschiedliche geometrische Anpassung der Arbeits- und/oder Zusatzmembrane an die durch die in ihrem Zentralbereich und am Umfangsrandbereich vorgesehenen Befestigungsstellen durch zwei ineinander fließende Kurven entsteht, die durch eine entsprechende Formgebung der Membrane zustande kommt .The solution of this task in the case of the reciprocating piston machine of the type mentioned at the outset is, in particular, that the geometrical adaptation of the working and / or additional membrane to the fastening points provided in its central region and on the peripheral edge region is created by two flowing curves, which comes about through an appropriate shaping of the membrane.
Ein weiterer Vorschlag zur Lösung der oben umschriebenen Aufgabe sieht vor, dass der Membranquerschnitt der Arbeitsund/oder Zusatzmembrane in ihrem verformbaren Membranbereich derart bemessen ist, dass während der Pumpbewegungen in den oberflächennahen Zonen des verformbaren Membranbereichs annähernd gleiche Spannungen beziehungsweise elastische Verformungen entstehen.Another proposal for solving the task outlined above provides that the membrane cross-section of the working and / or additional membrane in its deformable membrane area is dimensioned such that approximately the same stresses or elastic deformations occur in the near-surface zones of the deformable membrane area during the pumping movements.
Ein zusätzlicher, ebenfalls eigenständig schutzwürdiger Vorschlag zur Lösung der obengenannten Aufgabenstellung sieht des weiteren vor, dass die Arbeits- und/oder Zusatzmembrane in ihrem verformbaren Membranbereich zumindest zwei Freiträger- förmige Ringzonen hat, die in einer Querschnittsverengung der Membrane ineinander übergehen, und dass sich der Membranquerschnitt in den Ringzonen jeweils von der Querschnittsverengung aus erweitert.An additional, also independently worthy of protection, proposal to solve the above-mentioned problem also provides that the working and / or additional membrane has at least two cantilever-shaped ring zones in its deformable membrane area, which in a cross-sectional narrowing of the Membrane merge into each other, and that the membrane cross-section in the ring zones widens from the cross-sectional constriction.
Die Arbeits- und/oder Zusatzmembrane der erfindungsgemäßen Hubkolbenmaschine ist in ihrem verformbaren Membranbereich derart bemessen, dass während der Pumpbewegungen in den oberflächennahen Zonen des während der Pumpbewegungen verformenden Membranbereichs annähernd gleiche Spannungen beziehungsweise elastische Verformungen einstellen. Da bei der Arbeits- und/oder Zusatzmembrane der erfindungsgemäßen Hubkolbenmaschine partielle Spannungsspitzen im oberflächennahen Membranbereich vermieden werden, wird die durch die Hubbewegung der Arbeitsund/oder Zusatzmembrane erforderliche geometrische Verformung nicht durch zwei als Scharniere dienende Ringzonen, sondern durch zwei ineinander fließende Kurven dargestellt, deren Vereinigungspunkt, je nach Hubstellung, sich an einer anderen Stelle der Radialen zwischen dem Zentralbereich und dem in der Hubkolbenmaschine eingespannten Umfangsbereich liegen kann. Diese Kurven entstehen dadurch, dass die Stärke des für die Membrane verwendeten Elastomers an jeder Stelle der Membrane so gewählt wird, dass bei der Membranverformung durch den Hub diese beiden ineinander fließenden Kurven zustande kommen. Dies wird insbesondere durch die beiden Freiträger-förmigen Ringzonen erreicht, die so gestaltet und dimensioniert sind, dass in Ausgangsstellung der Membrane in jeder dieser Ringzonen unter der vorgesehenen Belastung die für die Ringzonen zugelassene Spannung gleichmäßig auftritt. Die Freiträger- förmigen Ringzonen zeichnen sich dadurch aus, dass sich der Membranquerschnitt in diesen Ringzonen jeweils von der Querschnittsverengung aus nach außen (äußere Ringzone) beziehungsweise nach innen (innere Ringzone) erweitert. Da die Arbeits- und/oder Zusatzmembrane der erfindungsgemäßen Hubkolbenmaschine somit keine, einer besonderen Belastung ausgesetzte Scharnierzonen hat, zeichnet sich die erfindungsgemäße Hubkolbenmaschine durch die langlebige und geräuscharme Arbeitsweise ihrer Arbeits- und/oder Zusatzmembranen aus.The working and / or additional membrane of the reciprocating piston machine according to the invention is dimensioned in its deformable membrane area such that during pumping movements in the zones near the surface of the membrane area deforming during pumping movements set approximately the same tensions or elastic deformations. Since partial stress peaks in the membrane area near the surface are avoided in the working and / or additional membrane of the reciprocating piston machine according to the invention, the geometric deformation required by the lifting movement of the working and / or additional membrane is not represented by two ring zones serving as hinges, but by two flowing curves, the curves of which Unification point, depending on the stroke position, may be located at a different point on the radial between the central region and the circumferential region clamped in the reciprocating piston machine. These curves result from the fact that the strength of the elastomer used for the membrane is selected at each point of the membrane so that these two flowing curves are created when the membrane is deformed by the stroke. This is achieved in particular by the two cantilever-shaped ring zones, which are designed and dimensioned such that, in the initial position of the membrane, the tension permitted for the ring zones occurs uniformly in each of these ring zones under the intended load. The cantilever-shaped ring zones are characterized in that the membrane cross-section in these ring zones widens from the cross-sectional constriction outwards (outer ring zone) or inwards (inner ring zone). Since the working and / or additional membrane of the invention Reciprocating machine thus has no hinge zones exposed to a particular load, the reciprocating machine according to the invention is distinguished by the long-lasting and low-noise mode of operation of its working and / or additional membranes.
Dabei ist es besonders vorteilhaft, wenn sich der Membranquerschnitt in den Ringzonen zumindest bereichsweise linear erweitert.It is particularly advantageous if the membrane cross section in the ring zones widens linearly at least in some areas.
Eine besonders vorteilhafte Ausfuhrungsform gemäß der Erfindung besteht darin, dass die Querschnittsverengung im Bereich von 0,6 bis 0,8 des Durchmessers des verformbaren Membranbereichs angeordnet ist.A particularly advantageous embodiment according to the invention consists in that the cross-sectional constriction is arranged in the range from 0.6 to 0.8 of the diameter of the deformable membrane area.
Dabei ist es besonders vorteilhaft, wenn die Hubkolbenmaschine als Membranpumpe ausgestaltet ist, deren schnelllaufende Arbeits- und/oder Zusatzmembrane regelmäßig einer besonderen Belastung ausgesetzt ist.It is particularly advantageous if the reciprocating piston machine is designed as a diaphragm pump, the high-speed working and / or additional diaphragm of which is regularly exposed to a particular load.
Die Arbeitsmembrane einer solchen Membranpumpe kann als Formoder als Flachmembrane ausgestaltet sein. Während bei der Formmembrane ein mit der Pleuelstange des Hubantriebes verbundenes Formteil in das elastomere Material der Membrane eingeformt ist, um die dem Pumpraum zugewandte Membranoberseite an den Querschnitt des Pumpraums derart formanpassen zu können, dass die Formmembrane im oberen Totpunkt den Pumpraum vollständig ausfüllt, ist die Flachmembrane in ihrem Zentralbereich zwischen dem oberen Ende der Pleuelstange und, auf ihrer dem Pumpraum zugewandten Membranoberseite, einer Druckscheibe einge- spannt.The working diaphragm of such a diaphragm pump can be designed as a shape or as a flat diaphragm. While a molded part connected to the connecting rod of the linear actuator is molded into the elastomeric material of the membrane in order to be able to adapt the upper side of the diaphragm facing the pump chamber to the cross-section of the pump chamber in such a way that the molded membrane completely fills the pump chamber at top dead center Flat diaphragm clamped in its central area between the upper end of the connecting rod and, on the upper side of the diaphragm facing the pump chamber, a thrust washer.
Weitere Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung eines erfindungsgemäßen Ausführungsbeispieles in Verbindung mit den Ansprüchen sowie der Zeichnung. Die einzelnen Merkmale können je für sich oder zu mehreren bei einer Ausfuhrungsform gemäß der Erfindung verwirklicht sein.Further features of the invention result from the following description of an embodiment according to the invention in Connection with the claims and the drawing. The individual features can be implemented individually or in groups in one embodiment according to the invention.
Es zeigt:It shows:
Fig. 1 eine Membranpumpe in einem Teil-Längsschnitt im Bereich ihres eine Arbeitsmembrane aufweisenden Pumpenkopfes , undFig. 1 shows a diaphragm pump in a partial longitudinal section in the region of its pump head having a working diaphragm, and
Fig. 2 die Membranpumpe aus Fig. 1 in der in Fig. 1 strichpunktiert gekennzeichneten Detailansicht.FIG. 2 shows the diaphragm pump from FIG. 1 in the detailed view indicated by dash-dotted lines in FIG. 1.
In Fig. 1 ist eine als Hubkolben dienende Arbeitsmembrane 1 einer als Membranpumpe ausgestalteten Hubkolbenmaschine in einem Teilquerschnitt dargestellt. Die Arbeitsmembrane 1 besteht aus einem elastomerem Material, in das ein Formteil 2 eingeformt ist. Während das den Zentralbereich 3 der Membrane 1 bildende Formteil 2 mit einer oszillierenden Pleuelstange 4 eines hier nicht weiter dargestellten Hubantriebes verbunden ist, ist der Umfangsrandbereich 5 der Membrane 1 im Pumpenkopf 6 der Hubkolbenmaschine eingespannt.In Fig. 1 a serving as a piston working diaphragm 1 of a piston pump designed as a diaphragm pump is shown in a partial cross section. The working membrane 1 consists of an elastomeric material, into which a molded part 2 is molded. While the molded part 2, which forms the central region 3 of the diaphragm 1, is connected to an oscillating connecting rod 4 of a lifting drive (not shown further here), the peripheral edge region 5 of the diaphragm 1 is clamped in the pump head 6 of the reciprocating piston machine.
Zwischen dem Zentralbereich 3 der Membrane 1 und ihrem in der Hubkolbenmaschine eingespannten Umfangsrandbereich 5 ist ein sich während der oszillierenden Pumpbewegungen verformender Membran- oder Walkbereich M vorgesehen.Between the central region 3 of the membrane 1 and its peripheral edge region 5 clamped in the reciprocating piston machine, a membrane or flexing region M is provided which deforms during the oscillating pumping movements.
Um materialverschleißende und gegebenenfalls auch lärmverur- sachende Spannungsspitzen im oberflächennahen Bereich der Membrane 1 zu vermeiden, ist der Membranquerschnitt der Arbeitsmembrane 1 in ihrem verformbaren Membranbereich M derart bemessen, dass während der Pumpbewegungen in den Oberflächen- nahen Zonen des verformbaren Membranbereichs M annähernd gleiche Spannungen beziehungsweise elastische Verformungen entstehen.In order to avoid material peaks and possibly noise-causing stress peaks in the area of the membrane 1 near the surface, the membrane cross section of the working membrane 1 in its deformable membrane area M is dimensioned such that during the pumping movements in the surface near zones of the deformable membrane area M approximately the same stresses or elastic deformations arise.
Bei der hier dargestellten Arbeitsmembrane 1 wird die durch die Hubbewegung erforderliche geometrische Verformung nicht - wie bei vorbekannten Arbeits- oder Zusatzmembranen bekannt - durch zwei Scharnier-Ringzonen dargestellt, sondern durch zwei ineinander fließende Kurven, deren Vereinigungspunkt, je nach Hub- Stellung, sich an einer anderen Stelle der Radialen zwischen dem Membranzentrum 3 und der Einspannstelle 5 liegen kann. Diese Kurven entstehen dadurch, dass die Stärke des für die Membrane 1 verwendeten Elastomers an jeder Stelle der Membrane 1 so bemessen ist, dass bei der Membranverformung durch den Hub diese beiden ineinander fließenden Kurven zustande kommen.In the working diaphragm 1 shown here, the geometric deformation required by the lifting movement is not represented by two hinge ring zones, as is known in the case of previously known working or additional diaphragms, but by two curves flowing into one another, the joining point of which, depending on the lifting position, per se another location of the radial between the membrane center 3 and the clamping point 5 may be. These curves result from the fact that the thickness of the elastomer used for the membrane 1 is dimensioned at every point of the membrane 1 in such a way that these two flowing curves come about when the membrane is deformed by the stroke.
Um die während der Walkbewegungen der Membrane auftretenden Spannungen zu reduzieren und um die durch die Hubbewegung erforderliche geometrische Verformung der Membrane nicht durch zwei Scharnierpunkte, sondern durch zwei ineinander fließende Kurven darstellen zu können, weist die Arbeitmembrane 1 zwei Freiträger-förmige Ringzonen 7, 8 auf, die im Außenumfangsbereich des verfahrbaren Membranbereichs M ineinander übergehen. Diese Freiträger-förmigen Ringzonen 7, 8 sind so gestaltet und dimensioniert, dass in Ausgangsstellung der Arbeitsmembrane 1 in jeder Ringzone 7, 8 unter der vorgesehenen Belastung die für die Ringzonen 7, 8 zugelassene Spannung gleichmäßig auftritt. Die Freiträger-förmigen Ringzonen 7, 8 zeichnen sich dadurch aus, dass sich der Membranquerschnitt in diesen Ringzonen 7, 8 jeweils von der Querschnittsverengung 9 aus nach außen (Ringzone 8) beziehungsweise nach innen (Ringzone 7) erweitert. In Fig. 1 und der Detailansicht gemäß Fig. 2 ist zu erkennen, dass sich der Membranquerschnitt der Arbeitmembrane 1 in diesen Ringzonen 7, 8 zumindest bereichsweise linear erweitert. Dabei ist die Querschnittsverengung 9 im Bereich von 0,6 bis 0,8 des Durchmessers des verformbaren Membranbereichs M angeordnet und bildet den annähernd in der dünnsten Stelle der Querschnittsverengung 9 liegenden Schnittpunkt der durch die Ringzonen 7, 8 definierten Verlängerungen der Ringzonen- Unterseiten.In order to reduce the stresses occurring during the flexing movements of the membrane and to be able to represent the geometric deformation of the membrane required by the lifting movement, not by two hinge points, but rather by two curves flowing into one another, the working membrane 1 has two cantilever-shaped ring zones 7, 8 , which merge into one another in the outer peripheral region of the movable membrane region M. These cantilever-shaped ring zones 7, 8 are designed and dimensioned such that in the starting position of the working membrane 1 in each ring zone 7, 8 the stress permitted for the ring zones 7, 8 occurs evenly under the intended load. The cantilever-shaped ring zones 7, 8 are characterized in that the membrane cross-section in these ring zones 7, 8 widens from the cross-sectional constriction 9 outwards (ring zone 8) or inwards (ring zone 7). In Fig. 1 and the detailed view of FIG. 2 it can be seen that the membrane cross section of the working membrane 1 in these ring zones 7, 8 is expanded linearly at least in some areas. The cross-sectional constriction 9 is arranged in the range from 0.6 to 0.8 of the diameter of the deformable membrane region M and forms the intersection of the extensions of the ring-zone undersides defined by the ring zones 7, 8, which is approximately in the thinnest point of the cross-sectional constriction 9.
Da bei der hier dargestellten Arbeitsmembrane 1 partielle Spannungsspitzen im oberflächennahen Membranbereich vermieden werden, zeichnet sich die hier dargestellte Membranpumpe durch die langlebige und geräuscharme Arbeitsweise ihrer Arbeitsmembrane 1 aus .Since partial stress peaks in the near-surface membrane area are avoided in the working diaphragm 1 shown here, the diaphragm pump shown here is distinguished by the long-lasting and low-noise mode of operation of its working diaphragm 1.
Ansprüche Expectations

Claims

Ansprüche Expectations
1. Hubkolbenmaschine mit zumindest einer Arbeitsmembrane (1) und/oder wenigstens einer Zusatzmembrane aus elastomerem Material sowie mit einem oszillierenden Hubantrieb, der an einem Zentralbereich (3) der Membrane (1) angreift, wobei zwischen dem Zentralbereich (3) der Membrane (1) und ihrem in der Hubkolbenmaschine eingespannten Umfangsrandbereich (5) ein sich während der oszillierenden Pumpbewegungen verformender Membranbereich (M) vorgesehen ist, dadurch gekennzeichnet, dass die durch den Hub unterschiedliche geometrische Anpassung der Arbeits- und/oder Zusatzmembrane (1) an die durch die in ihrem Zentralbereich und am Umfangsrandbereich vorgesehenen Befestigungsstellen durch zwei ineinander fließende Kurven entsteht, die durch eine entsprechende Formgebung der Membrane zustande kommt.1. reciprocating piston machine with at least one working diaphragm (1) and / or at least one additional diaphragm made of elastomeric material and with an oscillating lifting drive, which acts on a central area (3) of the diaphragm (1), with the diaphragm (1 ) and its peripheral edge area (5) clamped in the reciprocating piston machine, a membrane area (M) deforming during the oscillating pumping movements is provided, characterized in that the geometrical adaptation of the working and / or additional membrane (1) to the by the in its central area and at the peripheral edge area provided by two flowing curves, which is created by a corresponding shape of the membrane.
2. Hubkolbenmaschine nach dem Oberbegriff von Anspruch 1, insbesondere nach Anspruch 1, dadurch gekennzeichnet, dass der Membranquerschnitt der Arbeits- und/oder2. Reciprocating piston machine according to the preamble of claim 1, in particular according to claim 1, characterized in that the membrane cross section of the working and / or
Zusatzmembrane (1) in ihrem verformbaren MembranbereichAdditional membrane (1) in its deformable membrane area
(M) derart bemessen ist, dass während der Pumpbewegungen in den oberflächennahen Zonen des verformbaren(M) is dimensioned such that during the pumping movements in the near-surface zones of the deformable
Membranbereichs (M) annähernd gleiche Spannungen beziehungsweise elastische Verformungen entstehen.Membrane area (M) approximately equal stresses or elastic deformations arise.
3. Hubkolbenmaschine nach dem Oberbegriff von Anspruch 1 , insbesondere nach Anspruch 1 oder 2 , dadurch gekennzeichnet, dass die Arbeits- und/oder Zusatzmembrane in ihrem verformbaren Membranbereich (M) zumindest zwei Freiträger-förmige Ringzonen (7, 8) hat, die in einer Querschnittsverengung (9) der Membrane (1) ineinander übergehen, und dass sich der Membranquerschnitt in den Ringzonen (7, 8) jeweils von der Querschnittsverengung aus erweitert .3. reciprocating piston machine according to the preamble of claim 1, in particular according to claim 1 or 2, characterized in that the working and / or additional membrane in its deformable membrane region (M) has at least two cantilever-shaped ring zones (7, 8) which in a cross-sectional constriction (9) of the membrane (1) merge into one another, and that the membrane cross-section changes into the Ring zones (7, 8) each widened from the cross-sectional constriction.
4. Hubkolbenmaschine nach einem der Ansprüche 1 bis 3, 5 dadurch gekennzeichnet, dass sich der Membranquerschnitt in den Ringzonen (7, 8) zumindest bereichsweise linear erweitert .4. Reciprocating piston machine according to one of claims 1 to 3, 5 characterized in that the membrane cross section in the ring zones (7, 8) extends linearly at least in regions.
5. Hubkolbenmaschine nach einem der Ansprüche 1 bis 4, 10 dadurch gekennzeichnet, dass die Querschnittsverengung (9) ι im Bereich von 0,6 bis 0,8 des Durchmessers des verformbaren Membranbereiches (M) angeordnet ist.5. Reciprocating piston machine according to one of claims 1 to 4, 10 characterized in that the cross-sectional constriction (9) ι is arranged in the range from 0.6 to 0.8 of the diameter of the deformable membrane region (M).
6. Hubkolbenmaschine nach einem der Ansprüche 1 bis 5, 15 dadurch gekennzeichnet, dass die Hubkolbenmaschine als6. Reciprocating piston machine according to one of claims 1 to 5, 15, characterized in that the reciprocating piston machine as
Membranpumpe ausgestaltet ist.Diaphragm pump is designed.
7. Hubkolbenmaschine nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Arbeitsmembrane der7. Reciprocating machine according to one of claims 1 to 6, characterized in that the working diaphragm
20 Membranpumpe als Form- oder als Flachmembrane ausgestaltet ist .20 diaphragm pump is designed as a shaped or as a flat diaphragm.
8. Arbeits- oder Zusatzmembrane für eine Hubkolbenmaschine, die gemäß einem der Ansprüche 1 bis 7 ausgestaltet ist.8. working or additional membrane for a reciprocating piston engine, which is designed according to one of claims 1 to 7.
2525
Zusammenfassung Summary
EP04710821A 2003-03-22 2004-02-13 Reciprocating piston engine Withdrawn EP1611354A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10312898A DE10312898A1 (en) 2003-03-22 2003-03-22 reciprocating engine
PCT/EP2004/001390 WO2004083638A1 (en) 2003-03-22 2004-02-13 Reciprocating piston engine

Publications (1)

Publication Number Publication Date
EP1611354A1 true EP1611354A1 (en) 2006-01-04

Family

ID=32946074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04710821A Withdrawn EP1611354A1 (en) 2003-03-22 2004-02-13 Reciprocating piston engine

Country Status (4)

Country Link
US (1) US20060201324A1 (en)
EP (1) EP1611354A1 (en)
DE (1) DE10312898A1 (en)
WO (1) WO2004083638A1 (en)

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US2904068A (en) * 1956-05-14 1959-09-15 Weatherhead Co Appliance regulator
US4231287A (en) * 1978-05-01 1980-11-04 Physics International Company Spring diaphragm
US4237775A (en) * 1978-08-21 1980-12-09 Gould Inc. Diaphragm for pressure sensors
DE3018687C2 (en) * 1980-05-16 1986-10-30 J. Wagner Gmbh, 7990 Friedrichshafen Diaphragm for high pressure pumps, compressors or the like.
DE3928949A1 (en) * 1989-08-31 1991-03-14 Wagner Gmbh J DIAPHRAGM PUMP
CA2131449C (en) * 1992-03-05 2003-10-28 Joseph Luiz Santa A pump, control valve and diaphragm
DE9403103U1 (en) * 1994-02-24 1994-04-14 ASF, Gesellschaft für elektrotechnische Geräte mbH, 82178 Puchheim Diaphragm for a diaphragm pump for pumping a flammable fluid
DE19514316C1 (en) * 1995-04-18 1996-08-22 Wagner Gmbh J Diaphragm pump for viscous materials
DE19834468C1 (en) * 1998-07-30 2000-02-24 Asf Thomas Ind Gmbh Membrane for a membrane pump comprises a membrane body made of elastic material, which can be circumferentially tensioned, and a central rigid core
US6123320A (en) * 1998-10-09 2000-09-26 Swagelok Co. Sanitary diaphragm valve
US6276907B1 (en) * 1999-08-12 2001-08-21 Wagner Spray Tech Corporation Hydraulically driven diaphragm pump
JP3462448B2 (en) * 2000-05-25 2003-11-05 株式会社タクミナ Diaphragm and reciprocating pump

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Title
See references of WO2004083638A1 *

Also Published As

Publication number Publication date
US20060201324A1 (en) 2006-09-14
DE10312898A1 (en) 2004-10-07
WO2004083638A1 (en) 2004-09-30

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