EP0852673A1 - Rotary displacement pump - Google Patents

Rotary displacement pump

Info

Publication number
EP0852673A1
EP0852673A1 EP97925979A EP97925979A EP0852673A1 EP 0852673 A1 EP0852673 A1 EP 0852673A1 EP 97925979 A EP97925979 A EP 97925979A EP 97925979 A EP97925979 A EP 97925979A EP 0852673 A1 EP0852673 A1 EP 0852673A1
Authority
EP
European Patent Office
Prior art keywords
base plate
clamping plate
ring
membrane
annular surface
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
Application number
EP97925979A
Other languages
German (de)
French (fr)
Other versions
EP0852673B1 (en
Inventor
Rolf Kammerer
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.)
Inotec GmbH Transport und Foerdersysteme
Inotec GmbH
Original Assignee
Inotec GmbH Transport und Foerdersysteme
Inotec GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Inotec GmbH Transport und Foerdersysteme, Inotec GmbH filed Critical Inotec GmbH Transport und Foerdersysteme
Publication of EP0852673A1 publication Critical patent/EP0852673A1/en
Application granted granted Critical
Publication of EP0852673B1 publication Critical patent/EP0852673B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable

Definitions

  • the invention relates to a pump with the features specified in the preamble of claim 1.
  • a pump is known from DE-295 11 966 U.
  • the known pump has a stationary arrangement of a base plate and two clamping plates, between which the base plate is clamped.
  • In the surface of the base plate there is an annular surface which extends over a partial circle or a full circle and is covered by a membrane which is tightly clamped to the base plate at its edges by means of the one chipboard.
  • a pump channel is formed between the membrane and the annular surface of the base plate, into which an inlet and an outlet open through the base plate. The pump channel connects the inlet and the outlet on the longer path, whereas the shorter path between the inlet and outlet is blocked.
  • a rotor Coaxial to the ring surface, a rotor is arranged above the membrane, which has several rollers, which act on the membrane by means of axially displaceable pressure transmission elements, which are arranged in a ring-shaped manner above the membrane, and press them locally against the ring surface, as a result of which the Membrane interrupts the path from the inlet to the outlet at circumferential points and thus ensures the desired pumping effect.
  • the stroke of the pressure transmission elements can be adjusted by means of an adjusting ring which is arranged above the one clamping plate in the vicinity of the rollers; this also adjusts the pump output.
  • the tensioning plate which is arranged on the side of the base plate facing away from the membrane, is ring-shaped and is screwed to the opposite tensioning plate by means of a plurality of screws arranged on its circumference, whereby the edge of the membrane is firmly clamped at the same time.
  • a threaded rod Coaxial to the rotor shaft, a threaded rod extends outwards through the circular opening of the annular clamping plate, onto which an adjusting nut is screwed, which allows the pressure with which the rollers act on the membrane to be adjusted by spring force.
  • the pump delivery pressure can be changed by turning the adjusting nut.
  • the membrane and the base plate which together delimit the pump channel, are - in particular with abrasive media such as Mortar - wear parts that need to be replaced from time to time.
  • abrasive media such as Mortar - wear parts that need to be replaced from time to time.
  • the screws with which the clamping plates are screwed together and the adjusting nut must be removed in the known pump.
  • the base plate and membrane can then be removed and replaced as required.
  • the present invention has for its object to simplify the handling and maintenance of the pump.
  • the pump on the side that is particularly at risk of contamination is hermetically sealed and the penetration of dirt or aggressive pump fluid into the pump drive is no longer possible, even if the pump is used to replace the membrane and / or the base plate is opened. Since the center of the outer clamping plate is no longer required for passing a threaded bolt in the direction of the axis of the rotor, the outer clamping plate can now be connected to the opposite inner clamping plate by means of a single screw connection. This makes replacing the wearing parts child's play.
  • the pump has a stator 1 and a rotor 2.
  • the stator is part of the housing of the pump and has an outer clamping plate 24, an inner clamping plate 6, a base plate 3 and a membrane 11.
  • the base plate 3 is ring-shaped and arranged coaxially to the axis 4 of the rotor.
  • the base plate 3 has a flat ring surface 5, which is delimited by two conical clamping surfaces 9 and 10, which, as seen from the rotor 2, lie behind the ring surface 5: opposite them are two further clamping surfaces 7 and 8, which are on the inner clamping plate 6 are formed and cooperate with the clamping surfaces 9 and 10 in order to clamp between them the membrane 11, which consists of an elastomeric material, is a ring-shaped, flat structure in a relaxed, non-installed state and is clamped between the conical ones Clamping surfaces 7 to 10 is bent so that it arches over the flat ring surface 5.
  • a pump channel 12 is formed between the curved and thus elastically prestressed membrane 11 and the annular surface 5, into which an inlet 13 and an outlet 15 open, which is expediently located close to the inlet 13 and only to represent it can - is provided in the drawing in a diagonal arrangement.
  • the pump channel 12 is blocked on the short path from the inlet 13 to the outlet 15 by an elevation (not shown here) on the annular base plate 3.
  • a ring of plungers 14 is arranged, which serve as pressure transmission members.
  • the tappets are T-shaped in longitudinal section, extend parallel to the axis 4 and are arranged along the entire pump channel 12, which connects the inlet 13 to the outlet 15, but not over that section of the membrane 11 which rotates the rotor 2 leads from the outlet 15 to the inlet 13 because there the pump channel 12 is interrupted by the elevation provided on the ring-shaped base plate 3.
  • the plungers 14 are arranged displaceably in the clamping plate 6 parallel to the axis 4 and secured by an adjusting ring 17 which can be displaced against the restoring force of the diaphragm 11 in the direction of the axis 4 by means of an eccentric 19, so that the plunger has a variable end stop have, which makes it possible to reduce the maximum cross section of the pump channel 12 and thus to adjust the pump output.
  • the rotor 2 rotates around a shaft 20 which is mounted in a roller bearing 26 in the clamping plate 6 and in a further roller bearing 27 in the rear housing part.
  • the rotor has at least two free-running rollers 21, which roll over the plungers 14 and press them down, as a result of which the membrane 11 is pressed locally onto the annular surface 5. This local pressure point travels along the pump channel 12 with the rotor movement, pushes the amount of liquid in front of it through the outlet 15 and at the same time sucks in further liquid through the inlet 13.
  • the delivery pressure of the pump depends on the preload of the membrane 11. This preload depends on the material and the thickness of the membrane. but also the extent of their bend. In addition, the delivery pressure depends on the force. with which the plunger 14 act on the membrane 11. It can be changed by means of a second eccentric 22, which acts on the collar 20 on the shaft 20 via the rear roller bearing 27 and thereby more or less tensions a spring 29 which bears on the axially displaceable carrier 30 of the rollers 21 . By turning the eccentric 22, for example by means of a handwheel attached to the outside, the force with which the rollers 21 act on the membrane 11 can be increased or decreased.
  • the tappets 14 can deflect the pressure insofar as the pressure force exceeds the restoring force of the spring 29 which can be varied by turning the eccentric 22.
  • the membrane 11 is braced by means of a threaded bolt 31 which is screwed into the clamping plate 6, extends through the outer clamping plate 24 and carries a nut 32 which, when tightened, the outer clamping plate 24 against the base plate 3 and thus the Base plate 3 prints against the edge of the membrane 11.
  • the membrane 11 and the base plate 3 are clamped and at the same time the pump channel 12 is sealed. If the membrane 11 and / or the base plate 3 have to be replaced in the event of wear, only the nut 32 has to be loosened.
  • the outer clamping plate 24 can be removed and the base plate 3 and the membrane 11 are freely accessible.
  • the wear primarily occurs on the hard base plate 3 and, as a result of the abrasion from the base plate 3, manifests itself in an enlargement of the pump channel, which in turn leads to a reduction in the delivery pressure. When the delivery pressure drops, you can easily see when an exchange is required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Display Devices Of Pinball Game Machines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The description relates to a rotary displacement pump with a stator (1) having a base plate (3) and two clamping plates (6, 24) between which the base plate (3) is clamped and where one outer clamping plate (24) forms an outer wall of the pump, with an annular surface (5) in the upper surface of the base plate (3) extending over part or all of a circle, with an inlet (13) opening into the annular surface (5) and an outlet (15) leaving from the annular surface (5), with a diaphragm (11) covering the annular surface (5), the edges of which are tightly clamped to the base plate (3) by the clamping plate (6), with a driven rotor (2) fitted above the annular surface (5) which runs around the axis (4) of the annular surface (5), has several rollers (21), which are arranged at regular distances along the annular surface (5) over the base plate (3) and are borne to run freely on a common support and continuously press the diaphragm (11) locally against the annular surface (5) by running on the rear of a ring of individually movable pressure transmission members (14), so that the diaphragm (11) interrupts the path from the inlet (13) to the outlet (15), and with means (19, 22) for adjusting the pressure and/or the delivery capacity of the pump. According to the invention, the means (19, 22) for adjusting the pressure and delivery capacity are fitted on the side of the other clamping plate (6) away from the outer clamping plate (24).

Description

Rotationsverdrängerpumpe Rotary displacement pump
Beschreibung:Description:
Die Erfindung geht aus von einer Pumpe mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen. Eine solche Pumpe ist aus dem DE-295 11 966 U be¬ kannt. Die bekannte Pumpe hat eine stillstehende Anordnung aus einer Grund¬ platte und zwei Spannplatten, zwischen denen die Grundplatte eingespannt ist. In der Oberfläche der Grundplatte ist eine Ringfläche vorgesehen, welche sich über einen Teilkreis oder einen Vollkreis erstreckt und von einer Membran überdeckt ist, welche mittels der einen Spanπplatte an ihren Rändern dicht mit der Grund¬ platte verspannt ist. Zwischen der Membran und der Ringfläche der Grundplatte ist ein Pumpkanal gebildet, in welchen durch die Grundplatte hindurch ein Zulauf und ein Ablauf einmünden. Der Pumpkanal verbindet den Zulauf und den Ablauf auf dem längeren Weg, wohingegen der kürzere Weg zwischen Zulauf und Ab¬ lauf blockiert ist. Koaxial zur Ringfläche ist über der Membran ein Rotor angeord¬ net, welcher mehrere Rollen hat, die mittels axial verschieblicher Druckübertra¬ gungsglieder, welche kranzförmig über der Membran angeordnet sind, auf die Membran einwirken und sie lokal gegen die Ringfläche drücken, wodurch die Membran an umlaufenden Stellen den Weg vom Zulauf zum Ablauf unterbricht und dadurch für die gewünschte Pumpwirkung sorgt. Mittels eines Stellrings, wel¬ cher oberhalb der einen Spannplatte in der Nachbarschaft der Rollen angeordnet ist, kann der Hub der Druckübertragungsglieder eingestellt werden; damit wird zugleich die Förderleistung der Pumpe eingestellt.The invention relates to a pump with the features specified in the preamble of claim 1. Such a pump is known from DE-295 11 966 U. The known pump has a stationary arrangement of a base plate and two clamping plates, between which the base plate is clamped. In the surface of the base plate there is an annular surface which extends over a partial circle or a full circle and is covered by a membrane which is tightly clamped to the base plate at its edges by means of the one chipboard. A pump channel is formed between the membrane and the annular surface of the base plate, into which an inlet and an outlet open through the base plate. The pump channel connects the inlet and the outlet on the longer path, whereas the shorter path between the inlet and outlet is blocked. Coaxial to the ring surface, a rotor is arranged above the membrane, which has several rollers, which act on the membrane by means of axially displaceable pressure transmission elements, which are arranged in a ring-shaped manner above the membrane, and press them locally against the ring surface, as a result of which the Membrane interrupts the path from the inlet to the outlet at circumferential points and thus ensures the desired pumping effect. The stroke of the pressure transmission elements can be adjusted by means of an adjusting ring which is arranged above the one clamping plate in the vicinity of the rollers; this also adjusts the pump output.
Die Spannplatte, welche auf der der Membran abgewandten Seite der Grundplat¬ te angeordnet ist, ist ringförmig ausgebildet und durch mehrere an ihrem Umfang angeordnete Schrauben mit der gegenüberliegenden Spannplatte verschraubt, wodurch zugleich der Rand der Membran fest eingespannt wird. Koaxial zur Ro- torwelle erstreckt sich durch die kreisförmige Öffnung der ringförmigen Spann- platte eine Gewindestange nach außen, auf welche eine Stellmutter aufgedreht ist, welche es gestattet, über Federkraft den Druck einzustellen, mit welchem die Rollen auf die Membran einwirken. Durch Verdrehen der Stellmutter kann der Förderdruck der Pumpe verändert werden.The tensioning plate, which is arranged on the side of the base plate facing away from the membrane, is ring-shaped and is screwed to the opposite tensioning plate by means of a plurality of screws arranged on its circumference, whereby the edge of the membrane is firmly clamped at the same time. Coaxial to the rotor shaft, a threaded rod extends outwards through the circular opening of the annular clamping plate, onto which an adjusting nut is screwed, which allows the pressure with which the rollers act on the membrane to be adjusted by spring force. The pump delivery pressure can be changed by turning the adjusting nut.
Die Membran und die Grundplatte, welche gemeinsam den Pumpkanal begren¬ zen, sind - insbesondere bei abrasiven Medien wie z.B. Mörtel - Verschleißteile, die von Zeit zu Zeit gewechselt werden müssen. Dazu müssen bei der bekannten Pumpe die Schrauben, mit denen die Spannplatten miteinander verschraubt sind, sowie die Stellmutter entfernt werden. Danach können die Grundplatte und die Membran entnommen und nach Bedarf ausgetauscht werden.The membrane and the base plate, which together delimit the pump channel, are - in particular with abrasive media such as Mortar - wear parts that need to be replaced from time to time. For this purpose, the screws with which the clamping plates are screwed together and the adjusting nut must be removed in the known pump. The base plate and membrane can then be removed and replaced as required.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Handhabung und Wartung der Pumpe zu vereinfachen.The present invention has for its object to simplify the handling and maintenance of the pump.
Diese Aufgabe wird gelöst durch eine Pumpe mit den im Anspruch 1 angegebe¬ nen Merkmalen. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche. Bei der neuen Pumpe ist die Einrichtung zur Verstellung des Förderdrucks von der Seite der äußeren Spannplatte auf die gegenüberliegende Seite der Pumpe verlagert worden. Dadurch ist eine saubere Trennung zwischen dem Antrieb der Pumpe und den VerStelleinrichtungen auf der einen Seite und dem Pumpkanal mit Zulauf und Ablauf auf der anderen Seite herbeigeführt, wobei die Trennung durch die der äußeren Spannplatte gegenüberliegende innere Spannplatte her¬ beigeführt wird. Die äußere Spannplatte, die beim Stand der Technik ein den Verstellmechanismus für den Förderdruck mit Luft umgebender Ring sein mußte, kann erfindungsgemäß die Pumpe dicht abschließen. Entsprechendes gilt für die andere Spanπplatte, welche keinen axialen Durchgang für die Rotorachse mehr benötigt, sondern im Zentrum geschlossen ausgebildet sein kann. Dadurch ist die Pumpe auf jener Seite, die durch Verschmutzung besonders gefährdet ist, herme¬ tisch dicht und das Eindringen von Schmutz oder aggressiver Pumpflüssigkeit in den Pumpenantrieb ist nicht mehr möglich, selbst dann nicht, wenn die Pumpe für den Austausch der Membran und/oder der Grundplatte geöffnet wird. Da das Zentrum der äußeren Spannplatte nicht mehr für das Durchführen eines Gewin¬ debolzens in Richtung der Achse des Rotors benötigt wird, kann man stattdessen die äußere Spannplatte nunmehr mittels einer einzigen Schraubverbindung mit der gegenüberliegenden inneren Spannplatte verbinden. Der Austausch der Ver- schleißteile wird auf diese Weise kinderleicht.This object is achieved by a pump with the features specified in claim 1. Advantageous developments of the invention are the subject of the dependent claims. In the new pump, the device for adjusting the delivery pressure has been moved from the side of the outer clamping plate to the opposite side of the pump. This results in a clean separation between the drive of the pump and the adjusting devices on one side and the pump channel with inlet and outlet on the other side, the separation being brought about by the inner clamping plate opposite the outer clamping plate. The outer clamping plate, which in the prior art had to be a ring surrounding the adjusting mechanism for the delivery pressure with air, can seal off the pump according to the invention. The same applies to the other chipboard, which no longer requires an axial passage for the rotor axis, but can be designed to be closed in the center. As a result, the pump on the side that is particularly at risk of contamination is hermetically sealed and the penetration of dirt or aggressive pump fluid into the pump drive is no longer possible, even if the pump is used to replace the membrane and / or the base plate is opened. Since the center of the outer clamping plate is no longer required for passing a threaded bolt in the direction of the axis of the rotor, the outer clamping plate can now be connected to the opposite inner clamping plate by means of a single screw connection. This makes replacing the wearing parts child's play.
Da der Austausch der Verschleißteile kinderleicht ist und sehr rasch vonstatten geht, weil nur noch eine einzige Schraube gelöst werden muß, ist kein Hinde¬ rungsgrund vorhanden, preiswerte Verschleißteile einzusetzen, z.B. die ringförmi¬ ge Grundplatte aus einem formstabilen Kunststoff herzustellen, z.B. aus einem Polyamid oder aus einem Polyaryletherketon (PEK). Das Reibungsverhalten ei¬ nes solchen Kunststoffs gegenüber den zu pumpenden Medien ist im allgemei¬ nen günstiger als das einer metallischen Grundplatte. Weitere Vorteile der Erfindung ergeben sich aus dem in der beigefügten Zeich¬ nung dargestellten Ausführungsbeispiel, welche eine erfindungsgemäße Pumpe in einem Längsschnitt zeigt.Since the replacement of the wearing parts is child's play and is carried out very quickly because only a single screw has to be loosened, there is no reason to use inexpensive wearing parts, for example to produce the ring-shaped base plate from a dimensionally stable plastic, for example from a polyamide or from a polyaryl ether ketone (PEK). The friction behavior of such a plastic compared to the media to be pumped is generally more favorable than that of a metallic base plate. Further advantages of the invention result from the embodiment shown in the accompanying drawing, which shows a pump according to the invention in a longitudinal section.
Die Pumpe hat einen Stator 1 und einen Rotor 2. Der Stator ist ein Teil des Ge- häuses der Pumpe und weist eine äußere Spannpiatte 24, eine innere Spannplat¬ te 6, eine Grundplatte 3 und eine Membran 11 auf. Die Grundplatte 3 ist ringför¬ mig ausgebildet und koaxial zur Achse 4 des Rotors angeordnet. Die Grundplatte 3 hat eine ebene Ringfläche 5, welche begrenzt wird durch zwei konische Klemmflächen 9 und 10, welche vom Rotor 2 aus gesehen hinter der Ringfiäche 5 liegen: ihnen liegen zwei weitere Klemmflächen 7 und 8 gegenüber, die an der in¬ neren Spannplatte 6 ausgebildet sind und mit den Klemmflächen 9 und 10 zu¬ sammenwirken, um dazwischen die Membran 11 einzuklemmen, welche aus ei¬ nem elastomeren Werkstoff besteht, in entspanntem, nicht eingebautem Zustand ein ringförmiges, ebenes Gebilde ist und durch das Einspannen zwischen den ko- nischen Klemmflächen 7 bis 10 gebogen wird, so daß sie die ebene Ringfiäche 5 überwölbt. Zwischen der gewölbten und dadurch elastisch vorgespannten Mem¬ bran 11 und der Ringfläche 5 ist auf diese Weise ein Pumpkanal 12 gebildet, in welchen ein Zulauf 13 und ein Ablauf 15 münden, welcher zweckmäßigerweise dicht neben dem Zulauf 13 liegt und - nur um ihn darstellen zu können - in der Zeichnung in diagonaler Anordnung vorgesehen ist. Der Pumpkanal 12 ist auf dem kurzen Weg vom Zulauf 13 zum Ablauf 15 durch eine hier nicht dargestellte Erhebung auf der ringförmigen Grundplatte 3 blockiert.The pump has a stator 1 and a rotor 2. The stator is part of the housing of the pump and has an outer clamping plate 24, an inner clamping plate 6, a base plate 3 and a membrane 11. The base plate 3 is ring-shaped and arranged coaxially to the axis 4 of the rotor. The base plate 3 has a flat ring surface 5, which is delimited by two conical clamping surfaces 9 and 10, which, as seen from the rotor 2, lie behind the ring surface 5: opposite them are two further clamping surfaces 7 and 8, which are on the inner clamping plate 6 are formed and cooperate with the clamping surfaces 9 and 10 in order to clamp between them the membrane 11, which consists of an elastomeric material, is a ring-shaped, flat structure in a relaxed, non-installed state and is clamped between the conical ones Clamping surfaces 7 to 10 is bent so that it arches over the flat ring surface 5. In this way, a pump channel 12 is formed between the curved and thus elastically prestressed membrane 11 and the annular surface 5, into which an inlet 13 and an outlet 15 open, which is expediently located close to the inlet 13 and only to represent it can - is provided in the drawing in a diagonal arrangement. The pump channel 12 is blocked on the short path from the inlet 13 to the outlet 15 by an elevation (not shown here) on the annular base plate 3.
Auf der Außenseite der Membran 11 ist ein Kranz von Stößeln 14 angeordnet, welche als Druckübertragungsglieder dienen. Die Stößel sind im Längsschnitt T- förmig, erstrecken sich parallel zur Achse 4 und sind längs des gesamten Pump¬ kanals 12 angeordnet, der den Zulauf 13 mit dem Ablauf 15 verbindet, nicht aber über jenem Abschnitt der Membran 11 , welcher tn Drehπchtung des Rotors 2 vom Ablauf 15 zum Zulauf 13 führt, weil dort der Pumpkanal 12 durch die auf der ring¬ förmigen Grundplatte 3 vorgesehene Erhebung unterbrochen ist. Die Stößel 14 sind in der Spannplatte 6 parallel zur Achse 4 verschieblich ange¬ ordnet und durch einen Stellring 17 gesichert, welcher gegen die Rückstell kraft der Membran 11 in Richtung der Achse 4 mtttels eines Exzenters 19 verlagerbar ist, so daß die Stößel einen veränderlichen Endanschlag haben, der es gestattet, den maximalen Querschnitt des Pumpkanals 12 zu verringern und damit die För¬ derleistung der Pumpe einzustellen.On the outside of the membrane 11, a ring of plungers 14 is arranged, which serve as pressure transmission members. The tappets are T-shaped in longitudinal section, extend parallel to the axis 4 and are arranged along the entire pump channel 12, which connects the inlet 13 to the outlet 15, but not over that section of the membrane 11 which rotates the rotor 2 leads from the outlet 15 to the inlet 13 because there the pump channel 12 is interrupted by the elevation provided on the ring-shaped base plate 3. The plungers 14 are arranged displaceably in the clamping plate 6 parallel to the axis 4 and secured by an adjusting ring 17 which can be displaced against the restoring force of the diaphragm 11 in the direction of the axis 4 by means of an eccentric 19, so that the plunger has a variable end stop have, which makes it possible to reduce the maximum cross section of the pump channel 12 and thus to adjust the pump output.
Der Rotor 2 dreht sich um eine Welle 20, welche in einem Wälzlager 26 in der Spannplatte 6 und in einem weiteren Wälzlager 27 im hinteren Gehauseteil gela¬ gert ist. Der Rotor hat wenigstens zwei freilaufende Rollen 21 , welche über die Stößel 14 hinwegrolleπ und sie niederdrücken, wodurch die Membran 11 lokal an die Ringfläche 5 gedrückt wird. Diese lokale Andrückstelle wandert mit der Rotor¬ bewegung längs des Pumpkanals 12, schiebt die davor stehende Flüssigkeits¬ menge durch den Ablauf 15 hinaus und saugt gleichzeitig durch den Zulauf 13 weitere Flüssigkeit nach.The rotor 2 rotates around a shaft 20 which is mounted in a roller bearing 26 in the clamping plate 6 and in a further roller bearing 27 in the rear housing part. The rotor has at least two free-running rollers 21, which roll over the plungers 14 and press them down, as a result of which the membrane 11 is pressed locally onto the annular surface 5. This local pressure point travels along the pump channel 12 with the rotor movement, pushes the amount of liquid in front of it through the outlet 15 and at the same time sucks in further liquid through the inlet 13.
Der Förderdruck der Pumpe hängt von der Vorspannung der Membran 11 ab. Diese Vorspannung hängt vom Material und der Dicke der Membran ab. aber auch vom Ausmaß ihrer Biegung. Darύberhinaus hängt der Förderdruck von der Kraft ab. mit welcher die Stößel 14 auf die Membran 11 einwirken. Sie kann mit¬ tels eines zweiten Exzenters 22 verändert werden, welcher über das hintere Wälzlager 27 auf einen Kragen 28 an der Welle 20 einwirkt und dadurch eine Fe¬ der 29 mehr oder weniger spannt, welche auf dem axial verschieblichen Träger 30 der Rollen 21 lastet. Durch Verdrehen des Exzenters 22 z.B. mittels eines an der Außenseite angebrachten Handrades kann die Kraft, mit welcher die Rollen 21 auf die Membran 11 einwirken, erhöht oder erniedrigt werden. Bei exzessivem Druckaufbau unter der Membran 11 können die Stößel 14 dem Druck auswei¬ chen, soweit die Druckkraft die durch Verdrehen des Exzenters 22 veränderliche Rückstellkraft der Feder 29 übersteigt. Die Verspannung der Membran 11 geschieht mittels eines Gewindebolzens 31 , welcher in die Spannplatte 6 eingedreht ist, sich durch die äußere Spannplatte 24 erstreckt und eine Mutter 32 tragt, die, wenn sie angezogen wird, die äußere Spannplatte 24 gegen die Grundplatte 3 und damit die Grundplatte 3 gegen den Rand der Membran 11 druckt. Damit werden die Membran 11 und die Grundplat¬ te 3 eingespannt und gleichzeitig der Pumpkanal 12 abgedichtet Falls bei einem Verschleiß die Membran 11 und/oder die Grundplatte 3 ausgetauscht werden müssen, muß lediglich die Mutter 32 gelost werden. Danach kann die äußere Spannplatte 24 abgenommen werden und die Grundplatte 3 und die Membran 11 sind frei zugänglich. Der Verschleiß tritt in erster Linie an der harten Grundplatte 3 auf und äußert sich infolge des Abriebs von der Grundplatte 3 in einer Vergrö¬ ßerung des Pumpkanals, die ihrerseits eine Verringerung des Forderdrucks nach sich zieht. Am Absinken des Förderdrucks kann man daher leicht erkennen wann ein Austausch erforderlich ist. The delivery pressure of the pump depends on the preload of the membrane 11. This preload depends on the material and the thickness of the membrane. but also the extent of their bend. In addition, the delivery pressure depends on the force. with which the plunger 14 act on the membrane 11. It can be changed by means of a second eccentric 22, which acts on the collar 20 on the shaft 20 via the rear roller bearing 27 and thereby more or less tensions a spring 29 which bears on the axially displaceable carrier 30 of the rollers 21 . By turning the eccentric 22, for example by means of a handwheel attached to the outside, the force with which the rollers 21 act on the membrane 11 can be increased or decreased. In the event of excessive pressure build-up under the membrane 11, the tappets 14 can deflect the pressure insofar as the pressure force exceeds the restoring force of the spring 29 which can be varied by turning the eccentric 22. The membrane 11 is braced by means of a threaded bolt 31 which is screwed into the clamping plate 6, extends through the outer clamping plate 24 and carries a nut 32 which, when tightened, the outer clamping plate 24 against the base plate 3 and thus the Base plate 3 prints against the edge of the membrane 11. Thus the membrane 11 and the base plate 3 are clamped and at the same time the pump channel 12 is sealed. If the membrane 11 and / or the base plate 3 have to be replaced in the event of wear, only the nut 32 has to be loosened. Then the outer clamping plate 24 can be removed and the base plate 3 and the membrane 11 are freely accessible. The wear primarily occurs on the hard base plate 3 and, as a result of the abrasion from the base plate 3, manifests itself in an enlargement of the pump channel, which in turn leads to a reduction in the delivery pressure. When the delivery pressure drops, you can easily see when an exchange is required.

Claims

Ansprüche:Expectations:
1 Rotationsverdrangerpumpe mit einem eine Grundplatte (3) und zwei Spann¬ platten (6, 24) aufweisenden Stator (1), zwischen denen die Grundplatte (3) eingespannt ist und von denen eine, äußere, Spannplatte (24) eine Außen- wand der Pumpe bildet,1 rotary displacement pump with a stator (1) having a base plate (3) and two clamping plates (6, 24), between which the base plate (3) is clamped and of which one, outer, clamping plate (24) has an outer wall of the Pump forms,
mit einer in der Oberflache der Grundplatte (3) vorgesehenen sich über ei¬ nen Teilkreis oder Vollkreis erstreckenden Ringflache (5),with an annular surface (5) provided in the surface of the base plate (3) and extending over a partial or full circle,
mit einem in die Ringflache (5) mundenden Zulauf (13) und mit einem von derwith an inlet (13) opening into the ring surface (5) and with one of the
Ringflache (5) ausgehenden Ablauf (15),Ring surface (5) outgoing drain (15),
mit einer die Ringfiäche (5) überdeckenden Membran (11 ), welche durch die Spannplatte (6) an ihren Randern dicht mit der Grundplatte (3) verspannt ist,with a membrane (11) covering the ring surface (5), which is tightly clamped to the base plate (3) at its edges by the clamping plate (6),
mit einem über der Ringflache (5) angeordneten, angetriebenen Rotor (2), welcher um die Achse (4) der Ringfläche (5) umlauft, mehrere Rollen (21 ) hat, die in regelmäßigen Abstanden längs der Ringflache (5) über der Grundplatte (3) angeordnet und an einem gemeinsamen Trager freilaufend gelagert sind und die Membran (11 ) fortlaufend lokal gegen die Ringflache (5) drucken, in¬ dem sie auf der Ruckseite eines Kranzes von einzeln beweglichen Druck- ubertragungsgl ledern (14) laufen, wodurch die Membran (11 ) den Weg vom Zulauf (13) zum Ablauf (15) unterbricht,with a driven rotor (2) which is arranged above the ring surface (5) and which rotates about the axis (4) of the ring surface (5), has several rollers (21) which are arranged at regular intervals along the ring surface (5) above the base plate (3) are arranged and freely supported on a common support and continuously press the membrane (11) locally against the ring surface (5) by running leather (14) on the back of a ring of individually movable pressure transmission glasses, whereby the membrane (11) interrupts the path from the inlet (13) to the outlet (15),
und mit Mitteln (19, 22) zum Einstellen des Forderdrucks und/oder der För¬ derleistung der Pumpe,and with means (19, 22) for setting the delivery pressure and / or the delivery rate of the pump,
dadurch gekennzeichnet, daß die Mittel (19, 22) zum Einstellen des Forderdrucks und der Förderleistung auf der der äußeren Spannplatte (24) abgewandten Seite der anderen Spannplatte (6) angeordnet sindcharacterized in that the means (19, 22) for adjusting the Demand pressure and the delivery rate are arranged on the side of the other clamping plate (6) facing away from the outer clamping plate (24)
Rotationsverdrangerpumpe nach Anspruch 1 , dadurch gekennzeichnet, daß die äußere Spannplatte (24) durch eine zentrale Schraubeinrichtung (31 , 32) mit der anderen Spannplatte (6) verschraubt ist Rotationsverdrangerpumpe nach Anspruch 1 oder 2, dadurch gekennzeich¬ net, daß die Grundplatte (3) ein Ring istRotary displacement pump according to Claim 1, characterized in that the outer clamping plate (24) is screwed to the other clamping plate (6) by a central screwing device (31, 32). Rotary displacement pump according to Claim 1 or 2, characterized in that the base plate (3 ) is a ring
Rotationsverdrangerpumpe nach einem der vorstehenden Ansprüche, da¬ durch gekennzeichnet, daß die Grundplatte (3) aus einem formstabilen Kunststoff bestehtRotary displacement pump according to one of the preceding claims, characterized in that the base plate (3) consists of a dimensionally stable plastic
Rotationsverdrangerpumpe nach einem der vorstehenden Ansprüche, da¬ durch gekennzeichnet, daß zur Begrenzung des Rückhubs der Druckuber- tragungsgiieder (14) ein Stellring (17) vorgesehen ist, an welchem die Druck- ubertragungsglieder (14) beim Rückhub anschlagen, und daß die Lage des Stellrings (17) durch einen Exzenter (19) veränderbar istRotary displacement pump according to one of the preceding claims, characterized in that an adjusting ring (17) is provided to limit the return stroke of the pressure transmission members (14), on which the pressure transmission members (14) strike during the return stroke, and that the position of the Adjusting ring (17) can be changed by an eccentric (19)
Rotationsverdrangerpumpe nach einem der vorstehenden Ansprüche, da¬ durch gekennzeichnet, daß die Rollen (21 ) durch die Kraft einer Feder (23), welche auf den Träger (2) der Rollen einwirkt, gegen die Druckübertragungs- glieder (14) gedruckt werden und daß die Vorspannung der Feder (23) durch einen Exzenter (22) einstellbar istRotary displacement pump according to one of the preceding claims, characterized in that the rollers (21) are pressed against the pressure transmission members (14) by the force of a spring (23) which acts on the carrier (2) of the rollers and that the bias of the spring (23) is adjustable by an eccentric (22)
Rotationsverdrangerpumpe nach einem der vorstehenden Ansprüche, da¬ durch gekennzeichnet, daß die Membran (11) in entspanntem Zustand ein i w ebenes Gebilde ist, daß die Ringflache (5) eine im wesentlichen ebene Fläche ist, die zu beiden Seiten durch je eine Klemmfläche (9, 10) begrenzt ist, die gegen die Ebene der Ringfläche (5) geneigt und vom Rotor (2) aus ge¬ sehen hinter der Ebene der Ringfläche (5) verläuft und daß diesen beiden Klemmflächen (9, 10) je eine weitere zu ihr parallele Klemmfläche (7, 8) ge¬ genüberliegt, welche Bestandteil der Spannplatte (6) ist, so daß die Membran (11) durch das Einspannen zwischen den Klemmflächen (7-10) elastisch vor¬ gespannt ist und die Ringfläche (5) überwölbt. Rotary displacement pump according to one of the preceding claims, characterized in that the membrane (11) in the relaxed state is a generally flat structure, and that the annular surface (5) is essentially flat Is surface that is bounded on both sides by a clamping surface (9, 10), which is inclined against the plane of the ring surface (5) and seen from the rotor (2) behind the plane of the ring surface (5) and that These two clamping surfaces (9, 10) each have a further clamping surface (7, 8) parallel to it, which is part of the clamping plate (6), so that the membrane (11) is clamped between the clamping surfaces (7-10 ) is elastically biased and the ring surface (5) arches.
EP97925979A 1996-06-04 1997-06-04 Rotary displacement pump Expired - Lifetime EP0852673B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29609865U 1996-06-04
DE29609865U DE29609865U1 (en) 1996-06-04 1996-06-04 Rotary displacement pump
PCT/EP1997/002871 WO1997046808A1 (en) 1996-06-04 1997-06-04 Rotary displacement pump

Publications (2)

Publication Number Publication Date
EP0852673A1 true EP0852673A1 (en) 1998-07-15
EP0852673B1 EP0852673B1 (en) 2004-04-07

Family

ID=8024765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97925979A Expired - Lifetime EP0852673B1 (en) 1996-06-04 1997-06-04 Rotary displacement pump

Country Status (9)

Country Link
US (1) US6030190A (en)
EP (1) EP0852673B1 (en)
AT (1) ATE263924T1 (en)
CZ (1) CZ288831B6 (en)
DE (3) DE29609865U1 (en)
DK (1) DK0852673T3 (en)
HU (1) HUP9901585A3 (en)
PL (1) PL183138B1 (en)
WO (1) WO1997046808A1 (en)

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DE19713689C2 (en) * 1997-04-03 1999-09-09 Inotec Gmbh Rotary displacement pump
DE29705877U1 (en) * 1997-04-03 1998-02-19 INOTEC GmbH Transport- und Fördersysteme, 79761 Waldshut-Tiengen Rotary displacement pump
DE29706606U1 (en) 1997-04-12 1997-08-21 Kammerer, Rolf, 75196 Remchingen Rotary displacement pump
DE19717452A1 (en) * 1997-04-25 1998-10-29 Inotec Gmbh Peristaltic pump with captive ring membrane held over annular surface
DE29707480U1 (en) 1997-04-25 1997-07-17 Kammerer, Rolf, 75196 Remchingen Rotary displacement pump
US6736617B2 (en) * 2002-02-20 2004-05-18 Terumo Cardiovascular Systems Corporation Peristaltic pump having automatically adjusting bushing
GB2412698A (en) * 2004-04-01 2005-10-05 Boc Group Plc Peristaltic pump
JP3750689B1 (en) * 2005-02-04 2006-03-01 セイコーエプソン株式会社 Fluid transport device and fluid transporter
US8303275B2 (en) * 2006-12-07 2012-11-06 Seiko Epson Corporation Micropump, tube unit, and control unit
JP5298699B2 (en) 2008-08-20 2013-09-25 セイコーエプソン株式会社 Control unit, tube unit, micro pump
JP5282508B2 (en) * 2008-09-29 2013-09-04 セイコーエプソン株式会社 Control unit, tube unit, micro pump
JP5195368B2 (en) 2008-12-05 2013-05-08 セイコーエプソン株式会社 Tube unit, control unit, micro pump
JP5982855B2 (en) * 2012-02-17 2016-08-31 セイコーエプソン株式会社 Fluid transport device, replacement unit, and method of manufacturing replacement unit
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Also Published As

Publication number Publication date
ATE263924T1 (en) 2004-04-15
CZ288831B6 (en) 2001-09-12
CZ18998A3 (en) 2000-09-13
PL183138B1 (en) 2002-05-31
HUP9901585A3 (en) 2000-02-28
DE59711494D1 (en) 2004-05-13
WO1997046808A1 (en) 1997-12-11
PL324694A1 (en) 1998-06-08
DK0852673T3 (en) 2004-08-09
US6030190A (en) 2000-02-29
HUP9901585A2 (en) 1999-08-30
EP0852673B1 (en) 2004-04-07
DE29609865U1 (en) 1996-10-24
DE19723303A1 (en) 1998-02-12

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