US20130129555A1 - Contact Element For Rotary Piston Pump - Google Patents

Contact Element For Rotary Piston Pump Download PDF

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Publication number
US20130129555A1
US20130129555A1 US13/646,478 US201213646478A US2013129555A1 US 20130129555 A1 US20130129555 A1 US 20130129555A1 US 201213646478 A US201213646478 A US 201213646478A US 2013129555 A1 US2013129555 A1 US 2013129555A1
Authority
US
United States
Prior art keywords
rotary
pump housing
contact element
rotary pistons
rotary piston
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.)
Abandoned
Application number
US13/646,478
Other languages
English (en)
Inventor
Hans Juergen Linde
Bernhard Murrenhoff
Robert Kurz
Reinhard Denk
Josef Straßl
Thomas Boehme
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
Assigned to NETZSCH-PUMPEN & SYSTEME GMBH reassignment NETZSCH-PUMPEN & SYSTEME GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KERN, STEFAN, GRADL, MATHIAS, LINDE, HANS JUERGEN, VERHOEVEN, MARCEL, HERR, GUNTER, BOEHME, THOMAS, DENK, REINHARD, KREIDL, JOHANN, KURZ, ROBERT, WEIGL, STEFAN, WILLIS, ROGER, KAMAL, HISHAM, KNEIDL, FRANZ, MURRENHOFF, BERNHARD, STRASSL, JOSEF, TEKNEYAN, MIKAEL, WEBER, ERWIN
Publication of US20130129555A1 publication Critical patent/US20130129555A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • 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 piston pumps.
  • the rotary piston pump according to the invention comprises at least two counter-rotating rotary pistons which are disposed in an oval pump housing.
  • Each rotary piston comprises at least two rotary piston vanes and each rotary piston is provided with at least one contact element.
  • German patent application DE 37 07 722 A1 discloses a rotary pump, in particular for conveying solid-containing fluids.
  • the patent application discloses a rotary pump, wherein plastic or rubber strips are detachably connected to the outer ends of the displacer vanes of the rotary pistons.
  • the described elastic strips are fitted into a groove and are connected detachably in the radial direction to the outer end of the displacer vane with one or more screws.
  • German patent specification DE 1 553 031 A1 a rotary piston pump is described, wherein the housing interior 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 is intended to reduce media slippage between the rotary pistons and the housing interior wall.
  • German patent DE 1 807 392 A1 describes a rotary piston pump, wherein at least the head flanks of the rotary pistons, interacting with the housing interior wall, are provided with a corrosion- and abrasion-resistant plastic. Furthermore, the interior wall of the housing is provided with an enamel layer. In addition to the corrosion- and/or abrasion-resistant protection, the end faces of the rotary pistons and/or the housing can be lined with enamelled plates or plates made of plastic. A flexible soft material is preferably used for the lining.
  • a rotary piston pump emerges from British patent application GB 2 429 751 A, wherein the housing interior is lined with four wearing plates. Two wearing plates are provided for the rear wall with bores for the shafts receiving the rotary pistons. Two further, semicircular wearing plates are provided for the lining of the upper shell and the lower shell of the housing. Furthermore, a method for removing the semicircular wearing plates is disclosed.
  • a rotary piston pump for conveying liquid media with a high solid fraction is disclosed in German patent application DE 42 18 855 A1.
  • the patent application discloses a rotary piston pump, wherein the rotary pistons are provided all around the periphery with a jacket.
  • the jacket is characterised in that it comprises, on the outer surfaces of the piston circumferences, a profiling in the form of differently constituted grooves.
  • the problem underlying the invention is to provide an economical and wear-resistant rotary piston pump which has a high delivery capacity.
  • the rotary piston pump comprises at least two counter-rotating rotary pistons which are disposed in an oval pump housing.
  • each rotary piston comprises at least two rotary piston vanes, wherein each of these rotary pistons is provided with 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 with, in each case, at least one contact element. At least two rotary pistons in each case form a friction pair.
  • the oval pump housing is also provided at its interior with at least one exchangeable contact element.
  • the contact elements which are disposed at the flanks of the two rotary pistons of the rotary piston pump, are also exchangeable.
  • the active interrelation between the contact elements and the at least two rotary pistons is ensured in each rotational angle position of the rotary pistons by the arrangement and embodiment of the contact elements at the flanks of the rotary pistons.
  • the exchangeable contact element of the pump housing is constituted by at least two contact elements, this also being able to be one contact element which is constituted by a plurality of parts.
  • a contact element is a structure which in one part covers the rear side of the pump housing and the radial surfaces, as well as the extension pieces of the inlets and outlets.
  • the contact element of the pump housing comprises, on the radial surfaces, extension pieces which are inserted into the inflow opening and into the outflow opening of the pump housing.
  • Another part of the contact element is located in the cover on the end face of the pump housing. After assembly of the cover, this part is in an active interrelation with the contact element of the pump housing in the region of the sealing surface.
  • the contact elements of the at least two rotary pistons and/or of the pump housing are formed from a sealing and/or slidable material. These materials can be, amongst others, rubber, PTFE, metals or material mixtures.
  • the contact elements of the rotary pistons and of the pump housing can be made from different materials and/or material mixtures.
  • the material pairing between the rotary pistons and the contact element must be selected such that the rotary pistons form a friction pairing and that the motion of the rotary pistons in the pump housing is not blocked. It is clear to the person skilled in the art that rotary piston pumps can be lined with the most diverse materials depending on the area of application. The same applies to the contact elements of the rotary pistons. The aforementioned material selection does not therefore represent a conclusive limitation of the scope of protection.
  • the contact elements for the pump housing and the rotary pistons can be produced from different materials.
  • a first layer of the contact element, which is inserted into the interior of the pump housing, can for example be reinforced here with fibres and/or other materials.
  • the second layer of the contact element is constituted in a rubberised form, as a result of which it is ensured that the rotary pistons form a friction pair with one another.
  • the inner layer is therefore harder and more stable than the other.
  • the person skilled in the art is aware that the choice of the material combinations is dependent on the area of application of the rotary piston pump. The nature of the material arrangement may possibly have to be selected according to the nature of the application.
  • the contact elements of the rotary pistons are constituted rectangular or trapezoidal.
  • the flanks of the rotary pistons which are provided with contact elements, are constituted in their dimensions such that, in each rotational angle position of the rotary pistons, only materials form an active pairing with one another that give rise to as low a friction value as possible. This applies both to the friction partners between the rotary pistons, as well as to the friction partners at the end faces of the rotary pistons and the friction pairing comprising the rotary pistons and the piston housing. The disruption-free operation of the rotary piston pump is ensured by this friction pairing. This also occurs when the contact elements are constituted not only to ensure the friction pairing, but also as wear and/or corrosion protection.
  • the contact elements of the rotary pistons are made from an elastomer and the rotary pistons themselves from a metallic material, because the friction surface of the rotary pistons is smaller than the friction surface of the contact elements. This thus ensures that excess wear does not occur on the pump components.
  • the contact elements of the rotary pistons have a thickness from 0.5 mm to 20 mm or alternatively a thickness in a ratio of 1:3 to 1:300 to the spacing of the two piston flanks from one another. In the preferred embodiment, the contact elements are used with a thickness from 3 mm to 7 mm.
  • This friction-locked and/or form-fit and/or firmly bonded interconnection is produced by the fact that the contact elements are connected by vulcanisation and/or gluing to the rotary pistons. It is also conceivable for the contact elements to be able to be connected to the rotary pistons by a screwed connection or by clamping connections.
  • the contact elements of the rotary pistons and/or of the contact element for the pump housing are, apart from their material thickness and their material shape, their hardness.
  • the material in the embodiments can have a hardness between 10 Shore A and 100 Shore A and between 10 Shore D and 100 Shore D.
  • the contact elements are constituted with a hardness between 50 Shore A and 100 Shore A. Possible metallic materials, which can also be used to produce the contact elements, can also be constituted in different degrees of hardness.
  • the end face of the rotary pistons and the contact elements on the end plate of the pump housing form an active pairing after the assembly of the end plate. This active pairing is characterised by a particularly small contact or gap dimension.
  • the very small gap dimension ensures that as little as possible of the material to be pumped flows past the rotary pistons and that the rotary piston pump exhibits a very good suction capacity.
  • FIG. 1 shows diagrammatically the structure of a rotary piston pump.
  • FIG. 2 shows diagrammatically the arrangement of the rotary pistons and the contact elements in the pump housing.
  • FIG. 3 shows an exploded drawing of a piston and of the pump housing with contact elements.
  • FIG. 4 shows a diagrammatic front view of the structure of the contact element for the pump housing.
  • FIG. 5 shows a diagrammatic front view of the open pump housing with the rotary pistons.
  • FIG. 1 shows the diagrammatic structure of a rotary piston pump 20 .
  • Rotary piston pump 20 essentially comprises a motor 44 and a pump housing 28 in which rotary pistons 22 are disposed. Furthermore, an inflow opening 41 and an outflow opening 42 are represented.
  • FIG. 2 shows how rotary pistons 22 are disposed in pump housing 28 . Furthermore, inflow opening 41 and outflow opening 42 are represented, in which a contact element 34 b of pump housing 28 can be seen. Contact elements 34 a of rotary pistons 22 are fitted to flanks 24 of rotary pistons 22 . A friction pairing arises when cap 26 of rotary piston 22 enters into an active interrelation with a contact element 34 a of second rotary piston 22 .
  • FIG. 3 shows the structure of a pump housing 28 with one of two rotary pistons 22 and contact elements 34 a and 34 b in an exploded drawing.
  • Pump housing 28 can be seen, into interior 32 of which contact element 34 b is inserted.
  • Rotary pistons 22 are then inserted into contact element 34 b .
  • Rotary piston 22 has two flanks 24 and two caps 26 . Cutouts 35 are introduced into flanks 24 to receive contact elements 34 a .
  • Contact elements 34 a are dimensioned such that it is ensured that cap 26 of the one rotary piston 22 is always in an active interrelation with a contact element 34 a of second rotary piston 22 .
  • an end plate 30 is represented, with which pump housing 28 is closed.
  • End plate 30 of pump housing 28 is also provided with a contact element 34 b .
  • this contact element 34 b forms a unit which has only a minimal gap.
  • pump housing 28 is tightly sealed by the interaction of contact element 34 b of end plate 30 with a sealing surface 37 , which is located on contact element 34 b of pump housing 28 .
  • FIG. 4 represents the structure of contact element 34 b for pump housing 28 in a front view.
  • Contact element 34 b has an oval basic shape. Introduced into rear side 39 of contact element 34 b , which is located closest to the drive, are two cutouts 36 , through which the shafts (not represented here) are passed, to which rotary pistons 22 are fixed. Sealing surface 37 can be seen in the front view, which runs all around the periphery of contact element 34 b at its front side. The sealing between contact element 34 b of end plate 30 (not represented here) and pump housing 28 is ensured with this sealing surface 37 . Furthermore, extension pieces 38 for inflow opening 41 and outflow opening 42 are represented at flanks 40 of contact element 34 b.
  • FIG. 5 shows a front view of pump housing 28 , in which contact element 34 b for pump housing 28 and two rotary pistons 22 are located.
  • Inflow opening 41 and outflow opening 42 can be seen at the two flanks 40 of pump housing 28 .
  • Sealing surface 37 can be seen running around pump housing 28 .
  • Rotary pistons 22 are disposed in interior 32 of pump housing 28 .
  • Contact elements 34 a can be seen at flanks 24 of rotary pistons 22 .
  • Caps 26 of rotary pistons 22 are in an active connection either with contact element 34 b of pump housing 28 or with contact element 34 a of other rotary piston 22 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US13/646,478 2010-04-08 2012-10-05 Contact Element For Rotary Piston Pump Abandoned US20130129555A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010014248.4A DE102010014248B4 (de) 2010-04-08 2010-04-08 Kontaktelemente für Drehkolbenpumpen
DE102010014248.4 2010-04-08
PCT/DE2011/000372 WO2011124212A2 (de) 2010-04-08 2011-04-06 Kontaktelemente für drehkolbenpumpen

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2011/000372 Continuation WO2011124212A2 (de) 2010-04-08 2011-04-06 Kontaktelemente für drehkolbenpumpen

Publications (1)

Publication Number Publication Date
US20130129555A1 true US20130129555A1 (en) 2013-05-23

Family

ID=44581850

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/646,478 Abandoned US20130129555A1 (en) 2010-04-08 2012-10-05 Contact Element For Rotary Piston Pump

Country Status (10)

Country Link
US (1) US20130129555A1 (de)
EP (1) EP2556255B1 (de)
CN (1) CN103201458B (de)
AU (1) AU2011238239B2 (de)
BR (1) BR112012025732B1 (de)
CL (1) CL2012002794A1 (de)
DE (1) DE102010014248B4 (de)
MX (1) MX2012011669A (de)
SG (1) SG184425A1 (de)
WO (1) WO2011124212A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024038211A3 (de) * 2022-08-19 2024-05-30 Vogelsang Gmbh & Co. Kg Verdrängerkörper und pumpengehäuse für eine verdrängerpumpe

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012003066B3 (de) * 2012-02-17 2013-07-04 Netzsch Pumpen & Systeme Gmbh Verfahren und vorrichtung zum fixieren und synchronisieren von drehkolben in einer drehkolbenpumpe
DE102012003287A1 (de) 2012-02-20 2013-08-22 Netzsch Pumpen & Systeme Gmbh Drehkolben
DE102014117483A1 (de) 2014-04-14 2015-10-15 Erich Netzsch Gmbh & Co. Holding Kg Verstellbare Pumpeinheit für eine Verdrängerpumpe
CN108061032B (zh) * 2017-11-21 2019-02-22 燕山大学 无脉动高阶椭圆齿轮泵
DE102018008264B4 (de) 2018-10-18 2020-11-12 Doris Korthaus Drehkolbenpumpe mit Verschleißelementen zur Förderung von mit Feststoffen durchsetzten Fördermedien
DE202018004820U1 (de) 2018-10-18 2018-11-19 Doris Korthaus Drehkolbenpumpe mit Verschleißelementen zur Förderung von mit Feststoffen durchsetzten Fördermedien

Citations (13)

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Publication number Priority date Publication date Assignee Title
FR427472A (fr) * 1911-03-17 1911-08-04 Dauxin Soc Pompe rotative pouvant également servir de compresseur
US1097783A (en) * 1911-01-28 1914-05-26 Burgess Sulphite Fibre Co Process of blowing acid gases.
US2519588A (en) * 1943-12-24 1950-08-22 Borg Warner Pump housing
US2754050A (en) * 1950-04-22 1956-07-10 Gen Motors Corp Rotary blower
US2966860A (en) * 1957-04-03 1961-01-03 Lobee Pump & Machinery Co Pump for corrosive fluids
US3268949A (en) * 1964-03-28 1966-08-30 Werner & Pfleiderer Housing for screw extruders
US4028021A (en) * 1975-12-08 1977-06-07 Curtiss-Wright Corporation Rotary trochoidal compressor with compressible sealing
US4364664A (en) * 1980-03-20 1982-12-21 Firma Friedrich Theysohn Dual worm extruder having wear resistant bore walls
US4744738A (en) * 1984-10-08 1988-05-17 Shimadzu Corporation Gear pump or motor with hard layer in interior casing surface
US4846642A (en) * 1986-11-08 1989-07-11 Wankel Gmbh Rotary piston blower with foamed synthetic material surfaces running along roughened metal surfaces
US5816699A (en) * 1997-06-13 1998-10-06 Entek Manufacturing Inc. Twin screw extruder barrel with an easily removable seamless insert having a wear and corrosion resistant lining
US20090016893A1 (en) * 2006-10-03 2009-01-15 Schlumberger Technology Corporation Skinning of progressive cavity apparatus
WO2013163987A1 (de) * 2012-05-02 2013-11-07 Netzsch Pumpen & Systeme Gmbh Drehkolbenpumpe mit optimierten ein- und auslässen

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GB191206686A (en) * 1911-03-24 1912-07-18 Thomas Wilbraham Green Improvements in or relating to Rotary Blowers.
DE1553031C3 (de) 1965-10-29 1974-03-14 Eisenwerke Kaiserslautern Gmbh, 6750 Kaiserslautern Drehkolbenpumpe zum Fördern zähflüssiger Stoffe
DE2056661C3 (de) 1970-11-18 1975-03-27 Eisenwerke Kaiserslautern Gmbh, 6750 Kaiserslautern Verdrängerflügel für eine Drehkolbenpumpe zum Fördern zähflüssiger, gegebenenfalls inhomogener, korrosiver Medien
FR96392E (fr) 1968-11-07 1972-06-16 Eisenwerke Kaiserslautern G M Pompe a pistons rotatifs pour produits visqueux.
EP0225937B1 (de) * 1985-12-19 1990-08-29 Gerhard Eckart Drehkolbenpumpe zur Förderung von Gülle oder dgl.
JPS62191684A (ja) * 1986-02-17 1987-08-22 Kosaka Kenkyusho:Kk ２軸回転ポンプのケ−シング
DE3707722A1 (de) 1987-03-11 1988-09-29 Alois Boerger Rotorpumpe, insbesondere fuer die foerderung von feststoffe enthaltenden fluessigkeiten
DE4218855A1 (de) 1992-06-09 1993-12-16 Carl Enke Gmbh Pumpen Und Gebl Drehkolbenpumpe
US5567140A (en) * 1995-04-24 1996-10-22 Itt Corporation Keyed insert plate for curved rotary lobe pump chamber walls
GB2429751A (en) 2005-08-31 2007-03-07 Alfa Laval Corp Ab Axially removable flanged wearplate for lobe pump

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1097783A (en) * 1911-01-28 1914-05-26 Burgess Sulphite Fibre Co Process of blowing acid gases.
FR427472A (fr) * 1911-03-17 1911-08-04 Dauxin Soc Pompe rotative pouvant également servir de compresseur
US2519588A (en) * 1943-12-24 1950-08-22 Borg Warner Pump housing
US2754050A (en) * 1950-04-22 1956-07-10 Gen Motors Corp Rotary blower
US2966860A (en) * 1957-04-03 1961-01-03 Lobee Pump & Machinery Co Pump for corrosive fluids
US3268949A (en) * 1964-03-28 1966-08-30 Werner & Pfleiderer Housing for screw extruders
US4028021A (en) * 1975-12-08 1977-06-07 Curtiss-Wright Corporation Rotary trochoidal compressor with compressible sealing
US4364664A (en) * 1980-03-20 1982-12-21 Firma Friedrich Theysohn Dual worm extruder having wear resistant bore walls
US4744738A (en) * 1984-10-08 1988-05-17 Shimadzu Corporation Gear pump or motor with hard layer in interior casing surface
US4846642A (en) * 1986-11-08 1989-07-11 Wankel Gmbh Rotary piston blower with foamed synthetic material surfaces running along roughened metal surfaces
US5816699A (en) * 1997-06-13 1998-10-06 Entek Manufacturing Inc. Twin screw extruder barrel with an easily removable seamless insert having a wear and corrosion resistant lining
US20090016893A1 (en) * 2006-10-03 2009-01-15 Schlumberger Technology Corporation Skinning of progressive cavity apparatus
WO2013163987A1 (de) * 2012-05-02 2013-11-07 Netzsch Pumpen & Systeme Gmbh Drehkolbenpumpe mit optimierten ein- und auslässen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024038211A3 (de) * 2022-08-19 2024-05-30 Vogelsang Gmbh & Co. Kg Verdrängerkörper und pumpengehäuse für eine verdrängerpumpe

Also Published As

Publication number Publication date
CN103201458B (zh) 2015-09-16
WO2011124212A3 (de) 2013-03-21
EP2556255A2 (de) 2013-02-13
BR112012025732A2 (pt) 2016-06-28
EP2556255B1 (de) 2020-08-05
SG184425A1 (en) 2012-11-29
CL2012002794A1 (es) 2013-02-08
DE102010014248A1 (de) 2011-10-13
AU2011238239A1 (en) 2012-11-15
DE102010014248B4 (de) 2016-04-28
BR112012025732B1 (pt) 2021-02-23
MX2012011669A (es) 2012-12-17
CN103201458A (zh) 2013-07-10
WO2011124212A2 (de) 2011-10-13
AU2011238239B2 (en) 2015-08-13

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