EP2556255A2 - Contact element for rotary piston pump - Google Patents

Contact element for rotary piston pump

Info

Publication number
EP2556255A2
EP2556255A2 EP11729046A EP11729046A EP2556255A2 EP 2556255 A2 EP2556255 A2 EP 2556255A2 EP 11729046 A EP11729046 A EP 11729046A EP 11729046 A EP11729046 A EP 11729046A EP 2556255 A2 EP2556255 A2 EP 2556255A2
Authority
EP
European Patent Office
Prior art keywords
rotary piston
rotary
pump housing
contact element
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11729046A
Other languages
German (de)
French (fr)
Other versions
EP2556255B1 (en
Inventor
Hans Jürgen LINDE
Bernhard Murrenhoff
Robert Kurz
Reinhard Denk
Josef Strassl
Thomas Böhme
Hisham Kamal
Stefan Weigl
Roger Willis
Stefan Kern
Johann Kreidl
Gunter Herr
Franz Kneidl
Mikael Tekneyan
Erwin Weber
Marcel Verhoeven
Mathias Gradl
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme 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 Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP2556255A2 publication Critical patent/EP2556255A2/en
Application granted granted Critical
Publication of EP2556255B1 publication Critical patent/EP2556255B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • 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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • 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
    • F04C2210/00—Fluid
    • F04C2210/24—Fluid mixed, e.g. two-phase fluid
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/801—Wear plates
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/802—Liners

Definitions

  • the present invention relates to contact elements for the rotary pistons and the pump housing of rotary lobe pumps.
  • the rotary piston pump according to the invention consists of at least two oppositely moving rotary pistons, which are arranged in an oval pump housing.
  • Each rotary piston has at least two rotary vane and each rotary piston is provided with at least one contact element.
  • German patent application DE 37 07 722 A1 discloses a rotor pump, in particular for the promotion of solids containing liquids.
  • the patent application discloses a rotor pump in which plastic or rubber strips with the outer ends of the displacement vanes of the rotary pistons are detachably connected. The elastic strips described are introduced into a groove and connected with one or more screws in the radial direction releasably connected to the outer end of the displacer.
  • German patent DE 1 553 031 A1 is a rotary piston pump
  • the housing inner wall is provided with an enamel layer.
  • This enamel layer serves on the one hand to protect the housing against corrosive media and on the other hand, the media slippage between the rotary piston and the housing inner wall is to be reduced.
  • German patent DE 1 807 392 A1 describes a rotary piston pump in which at least the head flanks of the rotary pistons cooperating with the housing inner wall are provided with a corrosion and abrasion resistant plastic.
  • the inner wall of the housing is provided with an enamel layer.
  • the end faces of the rotary pistons and / or the housing may be covered with enamelled plates or with plates made of a plastic.
  • a resilient soft material is used for the lining.
  • British patent application GB 2 429 751 A discloses a rotary lobe pump in which the housing interior is lined with four wear plates. There are two wear plates for the back wall with holes for the rotary piston receiving waves provided. Two additional semicircular wear plates are provided for the lining of the upper shell and the lower shell of the housing. Furthermore, a method for removing the semicircular wear plates is disclosed.
  • a rotary lobe pump for conveying liquid media with a high solids content is disclosed in the German patent application DE 42 18 855 A1.
  • the patent application discloses a rotary pump in which the rotary pistons are provided all around with a jacket.
  • the jacket is characterized in that it has on the outer surfaces of the piston peripheries a profiling, in the form of differently configured grooves.
  • the invention has for its object to provide an economical and wear-resistant rotary piston pump having a high flow rate.
  • the rotary piston pump according to the invention comprises at least two counter-rotating rotary pistons which are arranged in an oval pump housing.
  • Each rotary piston has in a preferred embodiment
  • the at least two rotary pistons of the rotary piston pump are provided at the contact points of their flanks, each with at least one contact element. At the contact points, at least two rotary pistons each form a friction pair.
  • the oval pump housing is also provided on its inside with at least one replaceable contact element. Also, the contact elements, which are arranged on the flanks of the two rotary pistons of the rotary piston pump, are interchangeable.
  • the replaceable contact element of the pump housing is constructed from at least two contact elements, this may also be a contact element, which is composed of several parts. In the preferred embodiment, such a contact element will be a structure which in a part the back of the
  • the contact elements of the at least two rotary pistons and / or the pump housing are formed from a sealing and / or lubricious material.
  • the contact elements of the rotary piston and the pump housing may consist of different materials and / or mixtures of materials.
  • the material pairing between the rotary piston and the contact element must be selected such that the rotary pistons form a friction pairing and that the movement of the rotary pistons in the pump housing is not blocked.
  • the flanks of the rotary pistons which are provided with contact elements are formed in their dimensions so that at each rotational angle position of the rotary piston only materials together form an effective pair, which give rise to the lowest possible coefficient of friction.
  • This friction pairing ensures trouble-free operation of the rotary lobe pump. This also happens when the contact elements are not only designed to ensure the friction pairing, but also as wear and / or corrosion protection.
  • the contact elements of the rotary piston made of an elastomer and the rotary piston itself of a metallic material, because the friction surface of the rotary piston is smaller than the friction surface of the
  • the contact elements of the rotary piston have a thickness of 0.5 mm to 20 mm alternatively a thickness in the ratio of 1: 3 to 1: 300 to the distance between the two piston flanks to each other.
  • the contact elements are used with a thickness of 3 mm to 7 mm.
  • Screw connection or by clamping connections with the rotary piston can be connected.
  • the material in the embodiments may have a hardness between 10 Shore A and 100 Shore A and between 10 Shore D and 100 Shore D.
  • the contact elements are designed with a hardness between 50 Shore A and 100 Shore A.
  • metallic materials that can be used for the production of the contact elements are executable in different degrees of hardness.
  • the end face of the rotary piston and the contact elements on the end plate of the pump housing form an effective pairing after mounting the end plate. This combination is characterized by a particularly low contact or gap.
  • the very small gap ensures that as little as possible pumped material flows past the rotary piston and that the rotary lobe pump has a very good suction performance.
  • Figure 1 shows schematically the structure of a rotary lobe pump.
  • Figure 2 shows schematically the arrangement of the rotary piston and the contact elements in the pump housing.
  • Figure 3 shows an exploded view of a piston and the pump housing with contact elements.
  • Figure 4 shows a schematic front view of the structure of the contact element for the pump housing.
  • Figure 5 shows a schematic front view of the open pump housing with rotary piston.
  • Figure 1 shows the schematic structure of a rotary piston pump 20. Die
  • Rotary pump 20 essentially consists of a motor 44 and a pump housing 28 in which the rotary pistons 22 are arranged. Furthermore, an inflow opening 41 and an outflow opening 42 are shown.
  • FIG. 2 shows how the rotary pistons 22 are arranged in the pump housing 28.
  • inflow opening 41 and the outflow opening 42 are shown, in which a contact element 34b of the pump housing 28 can be seen.
  • FIG. 3 shows the construction of a pump housing 28 with one of two rotary pistons 22 and the contact elements 34a and 34b in an exploded view.
  • the pump housing 28 can be seen, in the inside 32 of which the contact element 34b is inserted.
  • the rotary pistons 22 used in the contact element 34b then the rotary pistons 22 used.
  • the rotary piston 22 has two flanks 24 and two caps 26. In the flanks 24 recesses 35 for receiving the contact elements 34 a are introduced.
  • the contact elements 34a are dimensioned so that it is ensured that the caps 26 of a rotary piston 22 is always in operative connection with a contact element 34a of the second rotary piston 22.
  • an end plate 30 is shown with the pump housing 28 is closed.
  • the end plate 30 of the pump housing 28 is also provided with a contact element 34b.
  • This contact element 34b forms after assembly with an end face 27 of the rotary piston 22 is a unit which has only a minimum gap.
  • the pump housing 28 by the interaction of the contact element 34 b of the end plate 30 with a sealing surface 37, located on the
  • FIG. 4 shows the structure of the contact element 34b for the pump housing 28 in a front view.
  • the contact element 34b has an oval shape.
  • two recesses 36 are introduced, through which the waves (not shown) are guided, to which the rotary piston 22 are attached.
  • the sealing surface 37 can be seen, which surrounds the contact element 34b on its front side all around. With this sealing surface 37, the seal between the contact element 34b of the end plate 30 (not shown here) and the pump housing 28 is ensured.
  • the projections 38 for the inflow opening 41 and the outflow opening 42 are shown on the flanks 40 of the contact element 34b.
  • FIG. 5 shows a front view of the pump housing 28 in which the contact element 34b for the pump housing 28 and two rotary pistons 22 are located.
  • the inflow opening 41 and the outflow opening 42 can be seen.
  • the sealing surface 37 can be seen.
  • the rotary piston 22 are arranged.
  • the contact elements 34a can be seen.
  • the caps 26 of the rotary piston 22 are in operative connection either with the contact element 34b of the pump housing 28 or with the contact element 34a of the other rotary piston 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The rotary piston pump (20) according to the invention consists of at least two counter-rotating rotary pistons (22) and an oval pump housing (28). Every rotary piston (22) has a rotary piston vane and is provided with at least one contact element (34a). The contact points of the flanks (24) of the at least two rotary pistons (22) in which the at least two rotary pistons (34) form a friction pairing are provided with at least one contact element (34a) each. The interior (32) of the oval pump housing (28) is likewise provided with at least one exchangeable contact element (34b).

Description

KONTAKTELEMENTE FÜR DREHKOLBENPUMPEN  CONTACT ELEMENTS FOR ROTARY PISTON PUMPS
Die vorliegende Erfindung betrifft Kontaktelemente für die Drehkolben und das Pumpengehäuse von Drehkolbenpumpen. The present invention relates to contact elements for the rotary pistons and the pump housing of rotary lobe pumps.
Die erfindungsgemäße Drehkolbenpumpe besteht aus mindestens zwei sich gegensinnig bewegenden Drehkolben, die in einem ovalen Pumpengehäuse angeordnet sind. Jeder Drehkolben weist mindestens zwei Drehkolbenflügel auf und jeder Drehkolben ist mit mindestens einem Kontaktelement versehen.  The rotary piston pump according to the invention consists of at least two oppositely moving rotary pistons, which are arranged in an oval pump housing. Each rotary piston has at least two rotary vane and each rotary piston is provided with at least one contact element.
Die deutsche Patentanmeldung DE 37 07 722 A1 offenbart eine Rotorpumpe, insbesondere für die Förderung von Feststoff enthaltenden Flüssigkeiten. Die Patentanmeldung offenbart eine Rotorpumpe, bei der Kunststoff- oder Gummileisten mit den Außenenden der Verdrängerflügel der Drehkolben lösbar verbunden sind. Die beschriebenen elastischen Leisten werden in eine Nut eingebracht und mit einer oder mehreren Schrauben in radialer Richtung lösbar mit dem Außenende des Verdrängerflügels verbunden. The German patent application DE 37 07 722 A1 discloses a rotor pump, in particular for the promotion of solids containing liquids. The patent application discloses a rotor pump in which plastic or rubber strips with the outer ends of the displacement vanes of the rotary pistons are detachably connected. The elastic strips described are introduced into a groove and connected with one or more screws in the radial direction releasably connected to the outer end of the displacer.
In der deutschen Patentschrift DE 1 553 031 A1 ist ein Drehkolbenpumpe  In the German patent DE 1 553 031 A1 is a rotary piston pump
beschrieben, bei der die Gehäuseinnenwand mit einer Emailschicht versehen ist. Diese Emailschicht dient einerseits zum Schutz des Gehäuses gegen korrosive Medien und zum anderen soll der Medienschlupf zwischen den Drehkolben und der Gehäuseinnenwand verringert werden. described in which the housing inner wall is provided with an enamel layer. This enamel layer serves on the one hand to protect the housing against corrosive media and on the other hand, the media slippage between the rotary piston and the housing inner wall is to be reduced.
Das deutsche Patent DE 1 807 392 A1 beschreibt eine Drehkolbenpumpe, bei der zumindest die mit der Gehäuseinnenwand zusammenwirkenden Kopfflanken der Drehkolben, mit einem korrosions- und abriebfesten Kunststoff versehen sind.  German patent DE 1 807 392 A1 describes a rotary piston pump in which at least the head flanks of the rotary pistons cooperating with the housing inner wall are provided with a corrosion and abrasion resistant plastic.
Weiterhin ist die Innenwand des Gehäuses mit einer Emailschicht versehen. Zusätzlich zu diesem Korrosions-und/oder Abriebschutz können die Stirnseiten der Drehkolben und/oder des Gehäuses mit emaillierten Platten oder mit Platten aus einem Kunststoff belegt sein. Vorzugsweise wird für den Belag ein nachgiebiger weicher Werkstoff verwendet. Furthermore, the inner wall of the housing is provided with an enamel layer. In addition to this corrosion and / or abrasion protection, the end faces of the rotary pistons and / or the housing may be covered with enamelled plates or with plates made of a plastic. Preferably, a resilient soft material is used for the lining.
Eine weitere Art die Verschleißteile an den Verdrängerflügeln einer Drehkolbenpumpe anzubringen ist in der deutschen Patentschrift DE 20 56 661 C3 beschrieben. Anders als in den vorab beschriebenen Druckschriften wird in der DE 20 56 661 C 3 ein Mantel aus korrosions- und abriebfestem Kunststoff über die, aus Metall bestehenden, Arbeitsflanken der Verdrängerflügel gestülpt. Am unteren Rand des Kunststoffmantels kann eine Dichtung angebracht sein, die das Eindringen des zu fördernden Mediums verhindert. Another type of wear parts to be attached to the displacement vanes of a rotary lobe pump is described in German Patent DE 20 56 661 C3. Unlike in the documents described above, in DE 20 56 661 C 3, a jacket made of corrosion-resistant and abrasion-resistant plastic is slipped over the metal working flanks of the displacer wings. At the bottom of the plastic sheath, a seal may be attached, which prevents the penetration of the medium to be conveyed.
Aus der britischen Patentanmeldung GB 2 429 751 A geht eine Drehkolbenpumpe hervor, bei der der Gehäuseinnenraum mit vier Verschleißplatten ausgekleidet ist. Es sind zwei Verschleißplatten für die Rückwand mit Bohrungen für die Drehkolben aufnehmenden Wellen vorgesehen. Zwei weitere, halbkreisförmige Verschleißplatten sind für die Auskleidung der Oberschale und der Unterschale des Gehäuses vorgesehen. Weiterhin ist ein Verfahren zum entfernen der halbkreisförmigen Verschleiss- platten offenbart.  British patent application GB 2 429 751 A discloses a rotary lobe pump in which the housing interior is lined with four wear plates. There are two wear plates for the back wall with holes for the rotary piston receiving waves provided. Two additional semicircular wear plates are provided for the lining of the upper shell and the lower shell of the housing. Furthermore, a method for removing the semicircular wear plates is disclosed.
Eine Drehkolbenpumpe zur Förderung von flüssigen Medien mit einem hohen Feststoffanteil ist in der deutschen Patentanmeldung DE 42 18 855 A1 offenbart. Die Patentanmeldung offenbart eine Drehkolbenpumpe, bei der die Drehkolben allumfänglich mit einem Mantel versehen sind. Der Mantel ist dadurch gekennzeichnet, dass er an den Außenflächen der Kolbenumfänge eine Profilierung, in Form von verschiedenartig ausgestalteten Rillen aufweist.  A rotary lobe pump for conveying liquid media with a high solids content is disclosed in the German patent application DE 42 18 855 A1. The patent application discloses a rotary pump in which the rotary pistons are provided all around with a jacket. The jacket is characterized in that it has on the outer surfaces of the piston peripheries a profiling, in the form of differently configured grooves.
Der Erfindung liegt die Aufgabe zugrunde eine ökonomische und verschleißfeste Drehkolbenpumpe zu schaffen, die eine hohe Förderleistung aufweist.  The invention has for its object to provide an economical and wear-resistant rotary piston pump having a high flow rate.
Die Aufgabe wird durch die Merkmale des Anspruches 1 gelöst. Weitere erfindungsgemäße Ausgestaltungen sind den Merkmalen der Unteransprüche zu entnehmen. The object is solved by the features of claim 1. Further embodiments according to the invention can be found in the features of the subclaims.
Die erfindungsgemäße Drehkolbenpumpe bestehend aus mindestens zwei sich gegensinnig bewegenden Drehkolben die in einem ovalen Pumpengehäuse ange- ordnet sind. Jeder Drehkolben weist in einer bevorzugten Ausführungsform The rotary piston pump according to the invention comprises at least two counter-rotating rotary pistons which are arranged in an oval pump housing. Each rotary piston has in a preferred embodiment
mindestens zwei Drehkolbenflügel auf, wobei jeder dieser Drehkolben mit at least two rotary wing, with each of these rotary pistons with
mindestens einem Kontaktelement versehen ist. Die mindestens zwei Drehkolben der Drehkolbenpumpe sind an den Kontaktstellen ihrer Flanken mit jeweils mindestens einem Kontaktelement versehen. An den Kontaktstellen bilden jeweils mindes- tens zwei Drehkolben ein Reibpaar. Das ovale Pumpengehäuse ist an seiner Innenseite ebenfalls mit mindestens einem austauschbaren Kontaktelement versehen. Auch die Kontaktelemente, die an den Flanken der zwei Drehkolben der Drehkolbenpumpe angeordnet sind, sind austauschbar. is provided at least one contact element. The at least two rotary pistons of the rotary piston pump are provided at the contact points of their flanks, each with at least one contact element. At the contact points, at least two rotary pistons each form a friction pair. The oval pump housing is also provided on its inside with at least one replaceable contact element. Also, the contact elements, which are arranged on the flanks of the two rotary pistons of the rotary piston pump, are interchangeable.
Durch die Anordnung und Ausgestaltung der Kontaktelemente an den Flanken der Drehkolben ist in jeder Drehwinkelstellung der Drehkolben der Wirkzusammenhang zwischen den Kontaktelementen und den mindestens zwei Drehkolben sichergestellt. Due to the arrangement and configuration of the contact elements on the flanks of the rotary pistons, the operative connection between the contact elements and the at least two rotary pistons is ensured in each rotational angle position of the rotary pistons.
Das austauschbare Kontaktelement des Pumpengehäuses ist aus mindestens zwei Kontaktelementen aufgebaut, dies kann auch ein Kontaktelement sein, welches aus mehreren Teilen aufgebaut ist. In der bevorzugten Ausführungsform wird ein solches Kontaktelement ein Gebilde sein, welches in einem Teil die Rückseite des The replaceable contact element of the pump housing is constructed from at least two contact elements, this may also be a contact element, which is composed of several parts. In the preferred embodiment, such a contact element will be a structure which in a part the back of the
Pumpengehäuses und die Radialflächen, sowie die Ansätze der Ein- und Auslässe abdeckt. In der Rückseite sind Aussparungen vorgesehen, durch welche die Wellen für die Aufnahme der Drehkolben geführt werden können. Weiterhin besitzt das Kontaktelement des Pumpengehäuses an den Radialflächen Ansätze, die in die Einströmöffnung und in die Ausströmöffnung des Pumpengehäuses eingeschoben werden. Im Deckel an der Stirnseite des Pumpengehäuses befindet sich ein weiterer Teil des Kontaktelements. Nach der Montage des Deckels steht dieser Teil mit dem Kontaktelement des Pumpengehäuses im Bereich der Dichtfläche in Wirkzusammenhang. Pump housing and the radial surfaces, as well as the approaches of the inlets and outlets covers. Recesses are provided in the back through which the shafts for receiving the rotary pistons can be guided. Furthermore, the contact element of the pump housing has at the radial surfaces approaches, which are inserted into the inlet opening and into the outflow opening of the pump housing. In the lid on the front side of the pump housing is another part of the contact element. After mounting the cover, this part is in operative connection with the contact element of the pump housing in the region of the sealing surface.
Die Kontaktelemente der mindestens zwei Drehkolben und/oder des Pumpenge- häuses sind aus einem abdichtenden und/oder gleitfähigen Werkstoff ausgebildet. The contact elements of the at least two rotary pistons and / or the pump housing are formed from a sealing and / or lubricious material.
Diese Werkstoffe können unter anderem Gummi, PTFE, Metalle oder Werkstoffgemische sein. Die Kontaktelemente der Drehkolben und des Pumpengehäuses können aus unterschiedlichen Werkstoffen und/oder Werkstoffgemischen bestehen. Die Werkstoffpaarung zwischen Drehkolben und Kontaktelement muss derart ge- wählt werden, dass die Drehkolben eine Reibpaarung bilden und dass die Bewegung der Drehkolben im Pumpengehäuse nicht blockiert ist. Für den Fachmann ist klar, dass Drehkolbenpumpen je nach Anwendungsgebiet mit den verschiedensten These materials may include rubber, PTFE, metals or mixtures of materials. The contact elements of the rotary piston and the pump housing may consist of different materials and / or mixtures of materials. The material pairing between the rotary piston and the contact element must be selected such that the rotary pistons form a friction pairing and that the movement of the rotary pistons in the pump housing is not blocked. For the expert it is clear that rotary lobe pumps, depending on the application with the most diverse
Werkstoffen ausgekleidet sein können. Das gleiche gilt für die Kontaktelemente der Drehkolben. Somit stellt die vorgenannte Materialauswahl keine abschließende Begrenzung des Schutzbereiches dar. Materials can be lined. The same applies to the contact elements of the rotary piston. Thus, the aforementioned material selection is not a final limitation of the scope.
In einer weiteren Ausführungsform können die Kontaktelemente für das  In a further embodiment, the contact elements for the
Pumpengehäuse und die Drehkolben aus verschiedenen Werkstoffen hergestellt sein. Hierbei ist es möglich eine erste Schicht des Kontaktelementes, welche in den Innenraum des Pumpengehäuses eingesetzt wird, zum Beispiel mit Fasern und/oder anderen Materialien zu verstärken. Die zweite Schicht des Kontaktelementes ist in einer gummierten Form ausgestaltet, wodurch sichergestellt ist, dass die Drehkolben miteinander ein Reibpaar bilden. Somit ist die innere Schicht härter und stabiler als die andere. Gleiches gilt für die Kontaktelemente der Drehkolben. Dem Fachmann ist bewußt, dass die Wahl der Materialkombinationen vom Anwendungsgebiet der Drehkolbenpumpe abhängig ist. Möglicherweise ist die Art der Materialanordnung nach der Art der Anwendung zu wählen. Pump housing and the rotary pistons made of different materials be. In this case, it is possible to reinforce a first layer of the contact element, which is inserted into the interior of the pump housing, for example with fibers and / or other materials. The second layer of the contact element is configured in a rubberized form, which ensures that the rotary pistons together form a friction pair. Thus, the inner layer is harder and more stable than the other. The same applies to the contact elements of the rotary piston. The skilled worker is aware that the choice of material combinations is dependent on the field of application of the rotary lobe pump. It may be necessary to choose the type of material arrangement according to the type of application.
Weiterhin ist es möglich die Kontaktelemente der mindestens zwei Drehkolben und des Pumpengehäuses als Verschleißschutz auszubilden. Bei dieser Verwendung wird nicht nur sichergestellt, dass der Wirkzusammenhang der Drehkolben untereinander und mit dem Pumpengehäuse sichergestellt ist, sondern auch, dass die Drehkolben und/oder das Pumpengehäuse zusätzlich vor Verschleiß geschützt werden. Furthermore, it is possible to form the contact elements of the at least two rotary pistons and the pump housing as wear protection. With this use, it is not only ensured that the operative relationship of the rotary pistons with each other and with the pump housing is ensured, but also that the rotary piston and / or the pump housing are additionally protected against wear.
Die Kontaktelemente der Drehkolben sind in den bevorzugten Ausführungsformen rechteckig oder trapezartig ausgestaltet. In besonderen Ausführungen, zum Beispiel bei gewendelten Drehkolben ist es zusätzlich notwendig die Kontaktelemente ebenfalls mit einer räumlichen Krümmung zu versehen.  The contact elements of the rotary pistons are configured rectangular or trapezoidal in the preferred embodiments. In special embodiments, for example in coiled rotary pistons, it is additionally necessary to provide the contact elements also with a spatial curvature.
Die Flanken der Drehkolben, welche mit Kontaktelementen versehen sind, sind in ihren Abmessungen so ausgebildet, dass zu jeder Drehwinkelstellung der Drehkolben nur Werkstoffe miteinander eine Wirkpaarung bilden, welche einen möglichst geringen Reibwert entstehen lassen. Dies gilt sowohl für die Reibpartner zwischen den Drehkolben, als auch für die Reibpartner an den Stirnflächen der Drehkolben und der Reibpaarung aus den Drehkolben und dem Pumpengehäuse. Durch diese Reibpaarung wird der störungsfreie Betrieb der Drehkolbenpumpe sichergestellt. Dies geschieht auch, wenn die Kontaktelemente nicht nur zur Sicherstellung der Reibpaarung, sondern auch als Verschleiß- und/oder Korrosionsschutz ausgebildet sind. The flanks of the rotary pistons, which are provided with contact elements are formed in their dimensions so that at each rotational angle position of the rotary piston only materials together form an effective pair, which give rise to the lowest possible coefficient of friction. This applies both to the friction partners between the rotary pistons, as well as for the friction partners on the end faces of the rotary piston and the friction pairing of the rotary piston and the pump housing. This friction pairing ensures trouble-free operation of the rotary lobe pump. This also happens when the contact elements are not only designed to ensure the friction pairing, but also as wear and / or corrosion protection.
In einer bevorzugten Ausführungsform bestehen die Kontaktelemente der Drehkolben aus einem Elastomer und die Drehkolben selber aus einem metallischen Werkstoff, weil die Reibfläche der Drehkolben kleiner ist, als die Reibfläche der In a preferred embodiment, the contact elements of the rotary piston made of an elastomer and the rotary piston itself of a metallic material, because the friction surface of the rotary piston is smaller than the friction surface of the
f Kontaktelemente. Hierdurch wird sichergestellt, dass kein übermäßiger Verschleiß an den Pumpenbauteilen auftritt. f Contact elements. This ensures that there is no excessive wear on the pump components.
Die Kontaktelemente der Drehkolben weisen eine Stärke von 0,5 mm bis 20 mm alternativ eine Stärke im Verhältnis von 1 :3 bis 1 :300 zum Abstand der beiden Kolbenflanken zueinander auf. In der bevorzugten Ausführungsform werden die Kontaktelemente mit einer Stärke von 3 mm bis 7 mm eingesetzt. Um eine sichere Wirkverbindung zwischen den Drehkolben zu gewährleisten ist es wichtig, dass die Kontaktelemente sicher mit den Drehkolben verbunden sind. Dieser kraftschlüssige und/oder formschlüssige und/oder stoffschlüssige Verbund wird dadurch erzeugt, dass die Kontaktelemente durch Vulkanisation und/oder Kleben mit dem Drehkolben verbunden sind. Es ist auch denkbar, dass die Kontaktelemente durch eine  The contact elements of the rotary piston have a thickness of 0.5 mm to 20 mm alternatively a thickness in the ratio of 1: 3 to 1: 300 to the distance between the two piston flanks to each other. In the preferred embodiment, the contact elements are used with a thickness of 3 mm to 7 mm. In order to ensure a secure operative connection between the rotary pistons, it is important that the contact elements are securely connected to the rotary pistons. This non-positive and / or positive and / or cohesive bond is generated in that the contact elements are connected by vulcanization and / or gluing with the rotary piston. It is also conceivable that the contact elements by a
Schraubverbindung oder durch Klemmverbindungen mit den Drehkolben verbindbar sind. Screw connection or by clamping connections with the rotary piston can be connected.
Weitere wichtige Merkmale der Ausgestaltung der Kontaktelemente der Drehkolben und/oder des Kontaktelements für das Pumpengehäuses sind neben deren Materialstärke und deren Materialform deren Härte. Das Material in den Ausführungsformen kann eine Härte zwischen 10 Shore A und 100 Shore A und zwischen 10 Shore D und 100 Shore D aufweisen. In einer bevorzugten Ausführungsform sind die Kontaktelemente mit einer Härte zwischen 50 Shore A und 100 Shore A ausgeführt. Auch mögliche metallische Werkstoffe, die für die Herstellung der Kontaktelemente eingesetzt werden können, sind in verschiedenen Härtegraden ausführbar. Die Stirnseite der Drehkolben und die Kontaktelemente an der Stirnplatte des Pumpengehäuses bilden nach der Montage der Stirnplatte eine Wirkpaarung. Diese Wirkpaarung zeichnet sich durch ein besonders geringes Kontakt- oder Spaltmaß aus. Durch das sehr geringe Spaltmaß wird sichergestellt, dass möglichst wenig zu pumpendes Material an den Drehkolben vorbeiströmt und dass die Drehkolbenpumpe eine sehr gute Saugleistung aufweist. Gleiches gilt für die Stirnfläche, die der Lagerung der Wellen zugewandt ist, und für den Bereich zwischen den Drehkolbenkappen und dem Pumpengehäuse.  Other important features of the configuration of the contact elements of the rotary piston and / or the contact element for the pump housing are in addition to the material thickness and the material form their hardness. The material in the embodiments may have a hardness between 10 Shore A and 100 Shore A and between 10 Shore D and 100 Shore D. In a preferred embodiment, the contact elements are designed with a hardness between 50 Shore A and 100 Shore A. Also possible metallic materials that can be used for the production of the contact elements are executable in different degrees of hardness. The end face of the rotary piston and the contact elements on the end plate of the pump housing form an effective pairing after mounting the end plate. This combination is characterized by a particularly low contact or gap. The very small gap ensures that as little as possible pumped material flows past the rotary piston and that the rotary lobe pump has a very good suction performance. The same applies to the end face, which faces the bearing of the shafts, and for the area between the rotary piston caps and the pump housing.
Im Folgenden sollen Ausführungsbeispiele die Erfindung und ihre Vorteile anhand der beigefügten Figuren näher erläutern. Die Größenverhältnisse der einzelnen Elemente zueinander in den Figuren entsprechen nicht immer den realen Größen- Verhältnissen, da einige Formen vereinfacht und andere Formen zur besseren Veranschaulichung vergrößert im Verhältnis zu anderen Elementen dargestellt sind.In the following, embodiments of the invention and their advantages with reference to the accompanying figures will be explained in more detail. The size ratios of the individual elements to each other in the figures do not always correspond to the real size Ratios, as some shapes are simplified and other shapes are shown enlarged in relation to other elements for ease of illustration.
Figur 1 zeigt schematisch den Aufbau einer Drehkolbenpumpe. Figure 1 shows schematically the structure of a rotary lobe pump.
Figur 2 zeigt schematisch die Anordnung der Drehkolben und der Kontaktelemente im Pumpengehäuse.  Figure 2 shows schematically the arrangement of the rotary piston and the contact elements in the pump housing.
Figur 3 zeigt eine Explosionszeichnung eines Kolbens und des Pumpengehäuses mit Kontaktelementen.  Figure 3 shows an exploded view of a piston and the pump housing with contact elements.
Figur 4 zeigt eine schematische Frontansicht des Aufbaus des Kontaktelements für das Pumpengehäuse. Figure 4 shows a schematic front view of the structure of the contact element for the pump housing.
Figur 5 zeigt eine schematische Frontansicht des offenen Pumpengehäuses mit Drehkolben. Figure 5 shows a schematic front view of the open pump housing with rotary piston.
Für gleiche oder gleich wirkende Elemente der Erfindung werden identische Identical or equivalent elements of the invention will be identical
Bezugszeichen verwendet. Ferner werden der Übersicht halber nur Bezugszeichen in den einzelnen Figuren dargestellt, die für die Beschreibung der jeweiligen Figur erforderlich sind. Reference numeral used. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures, which are required for the description of the respective figure.
Figur 1 zeigt den schematischen Aufbau einer Drehkolbenpumpe 20. Die Figure 1 shows the schematic structure of a rotary piston pump 20. Die
Drehkolbenpumpe 20 besteht im Wesentlichen aus einem Motor 44 und einem Pumpengehäuse 28 in dem die Drehkolben 22 angeordnet sind. Weiterhin sind eine Einströmöffnung 41 und eine Ausströmöffnung 42 dargestellt. Rotary pump 20 essentially consists of a motor 44 and a pump housing 28 in which the rotary pistons 22 are arranged. Furthermore, an inflow opening 41 and an outflow opening 42 are shown.
Figur 2 zeigt wie die Drehkolben 22 in dem Pumpengehäuse 28 angeordnet sind.FIG. 2 shows how the rotary pistons 22 are arranged in the pump housing 28.
Weiterhin sind die Einströmöffnung 41 und die Ausströmöffnung 42 dargestellt, in denen ein Kontaktelement 34b des Pumpengehäuses 28 zu erkennen ist. Die Furthermore, the inflow opening 41 and the outflow opening 42 are shown, in which a contact element 34b of the pump housing 28 can be seen. The
Kontaktelemente 34a der Drehkolben 22 sind an den Flanken 24 der Drehkolben 22 angebracht. Wenn die Kappen 26 des einen Drehkolbens 22 mit einem Contact elements 34a of the rotary pistons 22 are attached to the flanks 24 of the rotary pistons 22. When the caps 26 of a rotary piston 22 with a
Kontaktelement 34a des zweiten Drehkolbens 22 in Wirkzusammenhang tritt, entsteht eine Reibpaarung. Contact element 34a of the second rotary piston 22 comes into operative connection, creates a friction pairing.
Die Figur 3 zeigt den Aufbau eines Pumpengehäuses 28 mit einem von zwei Drehkolben 22 und den Kontaktelementen 34a und 34b in einer Explosionszeichnung. Es ist das Pumpengehäuse 28 zu erkennen, in dessen Innenseite 32 das Kontaktele- ment 34b eingesetzt wird. In das Kontaktelement 34b werden dann die Drehkolben 22 eingesetzt. Der Drehkolben 22 hat zwei Flanken 24 und zwei Kappen 26. In die Flanken 24 sind Aussparungen 35 zur Aufnahme der Kontaktelemente 34a eingebracht. Die Kontaktelemente 34a sind so dimensioniert, dass sicher gestellt ist, dass die Kappen 26 des einen Drehkolbens 22 immer in Wirkzusammenhang mit einem Kontaktelement 34a des zweiten Drehkolbens 22 steht. Weiterhin ist eine Stirnplatte 30 dargestellt mit der das Pumpengehäuse 28 verschlossen wird. Die Stirnplatte 30 des Pumpengehäuses 28 ist ebenfalls mit einem Kontaktelement 34b versehen. Dieses Kontaktelement 34b bildet nach der Montage mit einer Stirnseite 27 der Drehkolben 22 eine Einheit, welche nur einen minimalen Spalt aufweist. FIG. 3 shows the construction of a pump housing 28 with one of two rotary pistons 22 and the contact elements 34a and 34b in an exploded view. The pump housing 28 can be seen, in the inside 32 of which the contact element 34b is inserted. In the contact element 34b then the rotary pistons 22 used. The rotary piston 22 has two flanks 24 and two caps 26. In the flanks 24 recesses 35 for receiving the contact elements 34 a are introduced. The contact elements 34a are dimensioned so that it is ensured that the caps 26 of a rotary piston 22 is always in operative connection with a contact element 34a of the second rotary piston 22. Furthermore, an end plate 30 is shown with the pump housing 28 is closed. The end plate 30 of the pump housing 28 is also provided with a contact element 34b. This contact element 34b forms after assembly with an end face 27 of the rotary piston 22 is a unit which has only a minimum gap.
Weiterhin ist das Pumpengehäuse 28 durch das Zusammenwirken des Kontaktelementes 34b der Stirnplatte 30 mit einer Dichtfläche 37, die sich an dem Furthermore, the pump housing 28 by the interaction of the contact element 34 b of the end plate 30 with a sealing surface 37, located on the
Kontaktelement 34b des Pumpengehäuses 28 befindet, dicht verschlossen. Contact element 34b of the pump housing 28 is located, sealed.
In der Figur 4 ist der Aufbau des Kontaktelements 34b für das Pumpengehäuse 28 in einer Frontansicht dargestellt. Das Kontaktelement 34b besitzt eine ovale Gründform. In die Rückseite 39 des Kontaktelements 34b, welche dem Antrieb am nächsten gelegen ist, sind zwei Aussparungen 36 eingebracht, durch die die Wellen (hier nicht dargestellt) geführt werden, an welchen die Drehkolben 22 befestigt sind. In der Frontansicht ist die Dichtfläche 37 zu erkennen, welche das Kontaktelement 34b an seiner Frontseite allumfänglich umläuft. Mit dieser Dichtfläche 37 wir die Ab- dichtung zwischen dem Kontaktelement 34b der Stirnplatte 30 (hier nicht dargestellt) und dem Pumpengehäuse 28 sicher gestellt. Weiterhin sind die Ansätze 38 für die Einströmöffnung 41 und die Ausströmöffnung 42 an den Flanken 40 des Kontaktelementes 34b dargestellt.  FIG. 4 shows the structure of the contact element 34b for the pump housing 28 in a front view. The contact element 34b has an oval shape. In the back 39 of the contact element 34b, which is located closest to the drive, two recesses 36 are introduced, through which the waves (not shown) are guided, to which the rotary piston 22 are attached. In the front view, the sealing surface 37 can be seen, which surrounds the contact element 34b on its front side all around. With this sealing surface 37, the seal between the contact element 34b of the end plate 30 (not shown here) and the pump housing 28 is ensured. Furthermore, the projections 38 for the inflow opening 41 and the outflow opening 42 are shown on the flanks 40 of the contact element 34b.
Figur 5 zeigt eine Frontansicht des Pumpengehäuses 28 in dem sich das Kontakt- element 34b für das Pumpengehäuse 28 und zwei Drehkolben 22 befinden. An den beiden Flanken 40 des Pumpengehäuses 28 sind die Einströmöffnung 41 und die Ausströmöffnung 42 zu erkennen. Umlaufend um das Pumpengehäuse 28 ist die Dichtfläche 37 zu erkennen. Im Inneren 32 des Pumpengehäuses 28 sind die Drehkolben 22 angeordnet. An den Flanken 24 der Drehkolben 22 sind die Kontakt- elemente 34a zu erkennen. Die Kappen 26 der Drehkolben 22 stehen entweder mit dem Kontaktelement 34b des Pumpengehäuses 28 oder mit dem Kontaktelement 34a des anderen Drehkolbens 22 in Wirkverbindung. Die Erfindung wurde unter Bezugnahme auf eine bevorzugte Ausführungsform beschrieben. Es ist jedoch für einen Fachmann vorstellbar, dass Abwandlungen oder Änderungen der Erfindung gemacht werden können, ohne dabei den Schutzbereich der nachstehenden Ansprüche zu verlassen. FIG. 5 shows a front view of the pump housing 28 in which the contact element 34b for the pump housing 28 and two rotary pistons 22 are located. On the two flanks 40 of the pump housing 28, the inflow opening 41 and the outflow opening 42 can be seen. Surrounding the pump housing 28, the sealing surface 37 can be seen. In the interior 32 of the pump housing 28, the rotary piston 22 are arranged. On the flanks 24 of the rotary piston 22, the contact elements 34a can be seen. The caps 26 of the rotary piston 22 are in operative connection either with the contact element 34b of the pump housing 28 or with the contact element 34a of the other rotary piston 22. The invention has been described with reference to a preferred embodiment. However, it will be apparent to those skilled in the art that modifications or changes may be made to the invention without departing from the scope of the following claims.
Bezugszeichen reference numeral
20 Drehkolbenpumpe 20 rotary lobe pump
22 Drehkolben  22 rotary pistons
24 Flanke  24 flank
26 Kappen  26 caps
27 Stirnseite der Drehkolben  27 face of the rotary piston
28 Pumpengehäuse  28 pump housing
30 Stirnplatte des Pumpengehäuses  30 face plate of the pump housing
32 Innenseite des Pumpengehäuses  32 inside of the pump housing
34a Kontaktelement der Drehkolben  34a contact element of the rotary piston
34b Kontaktelement des Pumpengehäuses  34b contact element of the pump housing
35 Aussparung für Kontaktelemente  35 recess for contact elements
36 Aussparung für Welle  36 recess for shaft
37 Dichtfläche  37 sealing surface
38 Ansätze für Ein- und Ausströmöffnung  38 approaches for inlet and outlet
39 Rückseite des Kontaktelement des Pumpengehäuses 39 Rear side of the contact element of the pump housing
40 Flanken des Pumpengehäuses 40 flanks of the pump housing
41 Einströmöffnung  41 inflow opening
42 Ausströmöffnung  42 outflow opening
44 Motor  44 engine

Claims

Patentansprüche claims
1. Drehkolbenpumpe (20) bestehend aus mindestens zwei sich gegensinnig bewegenden Drehkolben (22) und einem Pumpengehäuse (28), wobei jeder Drehkolben (22) Drehkolbenflügel aufweist und wobei jeder Drehkolben (22) mindestens mit einem Kontaktelement (34) versehen ist, dadurch gekennzeichnet, dass die Drehkolben (22) an ihren Flanken (24) mit mindestens einem Kontaktelement (34a) versehen sind, mit denen die Drehkolben (22) ein Reibpaar bilden, wobei das Pumpengehäuse (28) an seiner Innenseite (32) mit mindestens einem Kontaktelement (34b) versehen ist und wobei die Kontaktelemente (34a) derart an den Flanken (24) der Drehkolben (22) angeordnet sind, dass ein Wirkzusammenhang zwischen den Kontaktelementen (34a) der Drehkolben (22) und Kappen (26) der Drehkolben (22) sichergestellt ist. 1. Rotary pump (20) consisting of at least two counter-rotating rotary piston (22) and a pump housing (28), each rotary piston (22) has rotary piston and wherein each rotary piston (22) is provided with at least one contact element (34) characterized in that the rotary pistons (22) are provided on their flanks (24) with at least one contact element (34a) with which the rotary pistons (22) form a friction pair, the pump housing (28) having at least one on its inside (32) Contact element (34 b) is provided and wherein the contact elements (34 a) on the flanks (24) of the rotary piston (22) are arranged such that an operative relationship between the contact elements (34 a) of the rotary piston (22) and caps (26) of the rotary piston ( 22) is ensured.
2. Drehkolbenpumpe (20) nach Anspruch 1 , dadurch gekennzeichnet, dass die 2. Rotary piston pump (20) according to claim 1, characterized in that the
Kontaktelemente (34a) der Drehkolben (22) und/oder das Kontaktelement (34b) des Pumpengehäuses (28) austauschbar sind. Contact elements (34a) of the rotary piston (22) and / or the contact element (34b) of the pump housing (28) are interchangeable.
3. Drehkolbenpumpe (20) nach Anspruch 1 , dadurch gekennzeichnet, dass das Kontaktelement (34b) des Pumpengehäuses (28) aus mindestens zwei Teilen besteht ist.  3. Rotary piston pump (20) according to claim 1, characterized in that the contact element (34b) of the pump housing (28) consists of at least two parts.
4. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) und/oder das Kontaktelement (34b) des Pumpengehäuses (28) durch Formschluss, Kraft- schluss oder Stoffschluss mit dem Drehkolben (22) und/oder dem Pumpengehäuse (28) verbunden sind.  4. rotary piston pump (20) according to one of claims 1 to 3, characterized in that the contact elements (34a) of the rotary piston (22) and / or the contact element (34b) of the pump housing (28) by positive engagement, frictional connection or material connection with the rotary piston (22) and / or the pump housing (28) are connected.
5. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) und/oder das Kontaktelement (34b) des Pumpengehäuses (28) aus einem abdichtenden und/oder gleitfähigen Werkstoff ausgebildet sind.  5. rotary piston pump (20) according to one of claims 1 to 4, characterized in that the contact elements (34 a) of the rotary piston (22) and / or the contact element (34 b) of the pump housing (28) formed from a sealing and / or lubricious material are.
6. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) und das Kontaktelement (34b) des Pumpengehäuses (28) aus unterschiedlichen Werkstoffen und/oder Werkstoffkombinationen ausgebildet sind. 6. rotary piston pump (20) according to one of claims 1 to 5, characterized in that the contact elements (34 a) of the rotary piston (22) and the Contact element (34b) of the pump housing (28) made of different materials and / or material combinations are formed.
7. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) und das Kontaktelement (34b) des Pumpengehäuses (28) als Verschleißschutz und/oder als Korrosionsschutz verwendbar sind.  7. rotary piston pump (20) according to one of claims 1 to 6, characterized in that the contact elements (34 a) of the rotary piston (22) and the contact element (34 b) of the pump housing (28) are used as wear protection and / or corrosion protection.
8. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) rechteckig oder trapezartig ausgestaltet sind.  8. Rotary pump (20) according to one of claims 1 to 7, characterized in that the contact elements (34a) of the rotary piston (22) are designed rectangular or trapezoidal.
9. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) und/oder das Kontaktelement (34b) des Pumpengehäuses (28) eine Dicke von 0,5 mm bis 20 mm, vorzugsweise eine Dicke von 3 mm bis 7 mm aufweisen.  9. rotary piston pump (20) according to one of claims 1 to 8, characterized in that the contact elements (34 a) of the rotary piston (22) and / or the contact element (34 b) of the pump housing (28) has a thickness of 0.5 mm to 20 mm, preferably have a thickness of 3 mm to 7 mm.
10. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) und/oder das Kontaktelement (34b) des Pumpengehäuses (28) aus Werkstoffen  10. rotary piston pump (20) according to one of claims 1 to 9, characterized in that the contact elements (34a) of the rotary piston (22) and / or the contact element (34b) of the pump housing (28) made of materials
verschiedenster Härtegrade herstellbar sind.  Different degrees of hardness can be produced.
11.Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Kontaktelemente (34a) der Drehkolben (22) und/oder das Kontaktelement (34b) des Pumpengehäuses (28) aus plastisch  11.Drehkolbenkolbenpumpe (20) according to one of claims 1 to 10, characterized in that the contact elements (34a) of the rotary piston (22) and / or the contact element (34b) of the pump housing (28) made of plastic
verformbaren Werkstoffen herstellbar sind.  deformable materials can be produced.
12. Drehkolbenpumpe (20) nach einem der Ansprüche 1 bis 11 , dadurch gekennzeichnet, dass der Wirkzusammenhang zwischen dem Kontaktelement (34b) des Pumpengehäuses (28) und den Stirnseiten (27) der Drehkolben (22) sichergestellt ist.  12. Rotary piston pump (20) according to one of claims 1 to 11, characterized in that the operative connection between the contact element (34b) of the pump housing (28) and the end faces (27) of the rotary piston (22) is ensured.
EP11729046.0A 2010-04-08 2011-04-06 Contact element for rotary piston pump Active EP2556255B1 (en)

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AU2011238239A1 (en) 2012-11-15
BR112012025732B1 (en) 2021-02-23
US20130129555A1 (en) 2013-05-23
DE102010014248B4 (en) 2016-04-28
WO2011124212A3 (en) 2013-03-21
WO2011124212A2 (en) 2011-10-13
CN103201458B (en) 2015-09-16
MX2012011669A (en) 2012-12-17
BR112012025732A2 (en) 2016-06-28
EP2556255B1 (en) 2020-08-05
CL2012002794A1 (en) 2013-02-08
DE102010014248A1 (en) 2011-10-13
AU2011238239B2 (en) 2015-08-13
CN103201458A (en) 2013-07-10

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