US20100054976A1 - Eccentric screw pump - Google Patents

Eccentric screw pump Download PDF

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Publication number
US20100054976A1
US20100054976A1 US12/547,939 US54793909A US2010054976A1 US 20100054976 A1 US20100054976 A1 US 20100054976A1 US 54793909 A US54793909 A US 54793909A US 2010054976 A1 US2010054976 A1 US 2010054976A1
Authority
US
United States
Prior art keywords
eccentric screw
food
elastic element
magnetic
fluid
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
US12/547,939
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English (en)
Inventor
Sander Dollner
Armin Startz
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.)
WMF Group GmbH
Original Assignee
WMF Group 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 WMF Group GmbH filed Critical WMF Group GmbH
Assigned to WMF WURTTEMBERGISCHE METALLWARENFABRIK AG reassignment WMF WURTTEMBERGISCHE METALLWARENFABRIK AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STARTZ, ARMIN, DOLLNER, SANDER
Publication of US20100054976A1 publication Critical patent/US20100054976A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting devices
    • A47J31/468—Pumping means
    • 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
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0069—Magnetic couplings
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits

Definitions

  • the present invention relates to an eccentric screw pump for fluids.
  • a fluid pump operating according to the displacement principle with a stator consisting of an elastomer which is provided with a continuous hollow space in longitudinal direction.
  • This hollow space in the un-deformed state of the stator is limited by two flat lateral surfaces and two semi-cylindrical end faces.
  • a motor provided with a round thread is arranged which can rotate relative to the stator wherein the hollow space of the stator and the round thread of the rotor are matched to each other in such a manner that the stator can only be deformed in a plane, namely in a plane perpendicularly to the lateral walls of the hollow space.
  • the present invention deals with the problem of stating an improved embodiment for an eccentric screw pump of the generic type which more preferably satisfies a very high hygiene standard.
  • the present invention is based on the general idea with an eccentric screw pump known per se, which comprises an eccentric screw, an elastic element surrounding said eccentric screw and a drive device, to realise contactless force transmission between the drive device and the eccentric screw or the elastic element exclusively via magnetic field forces.
  • the eccentric screw pump can be designed so that the drive device optionally drives the eccentric screw or the elastic element surrounding the latter in a contactless manner, wherein the eccentric screw or the elastic element then optionally comprise a magnetisable or magnetic part through which the magnetic field forces can be transmitted by the drive device.
  • the magnetic or magnetisable part of the eccentric screw or the elastic element are preferentially designed as magnetic or magnetisable core and covered by a covering so that the magnetisable part is not in direct contact with the fluid to be delivered.
  • the drive device is designed as a coil.
  • a coil of this type can for example be arranged axially adjacent or radially surrounding the eccentric screw pump or the elastic element, as a result of which a high level of design freedom with regard to the arrangement and configuration of the drive device can be created.
  • the coil itself does not require any rotating elements as a result of which it operates not only cost-effectively, but also with extremely low wear.
  • FIG. 1 an eccentric screw pump according to the invention in exploded view
  • FIG. 2 a sectional view through an eccentric screw pump according to the invention.
  • an eccentric screw pump 1 according to the invention comprises a housing 2 with an inlet and outlet 3 .
  • a stator 4 designed as elastic element and an eccentric screw 5 rotatably mounted therein are at least partially arranged within the housing 2 . These are held in the housing 2 via a housing lid 6 .
  • the components 2 , 4 , 5 and 6 together form a so-called pump head which is arranged in a housing-like receptacle 7 .
  • the eccentric screw 5 according to the embodiments shown in FIG. 1 and 2 comprises a magnetisable or magnetic drive disc 8 which is in force-transmitting contact via a face plate 9 with a likewise magnetic or magnetisable drive disc 8 ′ of a drive device which is not shown.
  • exclusively the eccentric screw 5 is driven by the drive device in a contactless manner while it is also conceivable that the drive device drives the elastic element 4 by means of magnetic field forces while the eccentric screw 5 forms the actual stator element.
  • force transmission between the drive device and the eccentric screw 5 or the elastic element 4 is exclusively effected via magnetic field forces, i.e. more preferably not through a shaft which would for example break through the receptacle 7 and thus create areas that are difficult to clean.
  • a pump can be created with the eccentric screw pump 1 according to the invention and its contactless drive which has no dead spaces or areas that are difficult to clean, in which germs can settle.
  • the resultant particularly hygienic operation can be additionally increased in that a magnetic/magnetisable part of the eccentric screw 5 or the elastic element 4 required for the drive according to FIG. 1 and 2 , i.e.
  • the drive disc 8 is no longer in contact with the fluid to be delivered and more preferably protected from direct contact with the fluid by means of a plastic covering.
  • the magnetic or magnetisable drive disc 8 thus merely forms a magnetic or magnetisable core which is covered by the plastic covering.
  • an electric magnet or a permanent magnet can for example be provided while it is also conceivable that the drive device has no rotating elements at all, i.e. more preferably no rotating magnetic or magnetisable drive disc 8 ′, but for example is designed as a coil. With a drive device designed as a coil, particularly low noise and low maintenance operation of the eccentric screw pump 1 is possible.
  • the drive device can optionally act on the eccentric screw 5 or the elastic element 4 surrounding the latter, wherein in the latter case the elastic element 4 likewise comprises a magnetic or magnetisable part, more preferably a magnetic or magnetisable core.
  • the eccentric screw pump 1 can be part of a coffee maker or a device for dosing or dispensing liquids and/or foam more preferably for the dosing or dispensing of milk froth.
  • the eccentric screw pump 1 is part of a device for the dosing or the dispensing of sauces and/or pasty foods for example mustard, mayonnaise or ketchup.
  • the eccentric screw pump 1 shown according to FIG. 1 and FIG. 2 are enclosed by the inventive idea but also other embodiments wherein contactless drive of the eccentric screw 5 or the elastic element 4 takes place and wherein the eccentric screw pump 1 because of the contactless drive can be disassembled and thus cleaned particularly easily and simply.
  • the receptacle 7 can also be embodied entirely without undercuts and blind holes so that after disassembly of the pump head formed of parts 2 , 4 , 5 and 6 only largely flat surfaces which are easy to clean remain.
  • the eccentric screw pump 1 according to the invention can also have a suitable device which makes it possible to overcome the magnetic forces between the drive disc 8 ′ and the drive disc 8 during the assembly, wherein this is most easily realised for example through a thread with a large pitch on the housing 2 .
  • the eccentric screw pump 1 according to the invention can also be cleaned by conventional users without problems, while the cleaning result can also be visually verified because of the simplified assembly.
  • the eccentric screw pump 1 according to the invention can be manufactured cost-effectively and allows the user to see the complete media path of the fluid to be delivered.
  • the elastic element 4 can assume additional sealing functions, more preferably to seal the housing 2 against the receptacle 7 . Particularly practical here is a sealing function of the housing 2 towards the housing lid 6 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Apparatus For Making Beverages (AREA)
US12/547,939 2008-08-27 2009-08-26 Eccentric screw pump Abandoned US20100054976A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008039973A DE102008039973A1 (de) 2008-08-27 2008-08-27 Exzenterschneckenpumpe
DE102008039973.6 2008-08-27

Publications (1)

Publication Number Publication Date
US20100054976A1 true US20100054976A1 (en) 2010-03-04

Family

ID=41277446

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/547,939 Abandoned US20100054976A1 (en) 2008-08-27 2009-08-26 Eccentric screw pump

Country Status (4)

Country Link
US (1) US20100054976A1 (ja)
EP (1) EP2160965B1 (ja)
JP (1) JP2010053865A (ja)
DE (1) DE102008039973A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800003690A1 (it) * 2018-03-16 2019-09-16 Scarponi Lorenzo S R L Dispositivo dosatore
US20200370555A1 (en) * 2018-01-05 2020-11-26 Hero Europe S.R.L. Volumetric dosing pump and dosing system comprising at least one of such pumps

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010019057A1 (de) 2010-05-03 2011-11-03 Wmf Württembergische Metallwarenfabrik Ag Fluidpumpe
DE102012214584A1 (de) 2012-08-16 2014-02-20 Wmf Württembergische Metallwarenfabrik Ag Pumpenmodul
NL2016728B1 (en) * 2016-05-03 2017-11-10 Actuant Corp Pump unit with integrated piston pump and electric motor.
JP6820544B2 (ja) * 2016-09-09 2021-01-27 パナソニックＩｐマネジメント株式会社 飲料製造装置
IT201600099445A1 (it) 2016-10-04 2018-04-04 Fluid O Tech Srl Pompa emulsionatrice.
EP3616529A1 (de) * 2018-08-29 2020-03-04 INDAG Pouch Partners GmbH Verdrängerdosierpumpe und verwendung der verdrängerdosierpumpe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161374A (en) * 1936-05-26 1939-06-06 Moineau Rene Joseph Louis Motor pump or electric generator
JPS63302189A (ja) * 1987-05-30 1988-12-09 Kyocera Corp 偏心ねじポンプ
US5305923A (en) * 1990-06-06 1994-04-26 The Coca-Cola Company Postmix beverage dispensing system
US5735436A (en) * 1990-06-06 1998-04-07 The Coca-Cola Company Juice concentrate package for postmix dispenser
US5778765A (en) * 1995-12-30 1998-07-14 Braun Aktiengesellschaft Beverage brewing apparatus
US20070104595A1 (en) * 2004-08-10 2007-05-10 Helmut Jaberg Eccentric Screw Pump With Integrated Drive

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE686631C (de) * 1936-05-26 1940-01-13 Brev Moineau S A R L Soc D Exp Schraubenpumpe oder -motor
DE4313442A1 (de) 1993-04-24 1994-10-27 Resch Maschinen Und Geraetebau Fluidpumpe
DE10251846A1 (de) * 2002-11-07 2004-05-19 Netzsch-Mohnopumpen Gmbh Pumpenantrieb
JP4815225B2 (ja) * 2006-01-25 2011-11-16 兵神装備株式会社 ポンプ装置
PL2035709T3 (pl) * 2006-06-30 2016-11-30 Pompa śrubowa typu Moineau
US7553139B2 (en) * 2006-10-06 2009-06-30 Moyno, Inc. Progressing cavity pump with wobble stator and magnetic drive
JP4814057B2 (ja) * 2006-11-06 2011-11-09 象印マホービン株式会社 液体容器
JP2008175199A (ja) * 2006-12-20 2008-07-31 Heishin Engineering & Equipment Co Ltd 一軸偏心ねじポンプ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161374A (en) * 1936-05-26 1939-06-06 Moineau Rene Joseph Louis Motor pump or electric generator
JPS63302189A (ja) * 1987-05-30 1988-12-09 Kyocera Corp 偏心ねじポンプ
US5305923A (en) * 1990-06-06 1994-04-26 The Coca-Cola Company Postmix beverage dispensing system
US5735436A (en) * 1990-06-06 1998-04-07 The Coca-Cola Company Juice concentrate package for postmix dispenser
US5778765A (en) * 1995-12-30 1998-07-14 Braun Aktiengesellschaft Beverage brewing apparatus
US20070104595A1 (en) * 2004-08-10 2007-05-10 Helmut Jaberg Eccentric Screw Pump With Integrated Drive

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EP 1418336 A1, Achleitneret al., Peristaltic Pump for High Viscoity Fluids has Magnets in Rotor and Coils in Stator to Produce Rotary Drive Field, May 2004 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200370555A1 (en) * 2018-01-05 2020-11-26 Hero Europe S.R.L. Volumetric dosing pump and dosing system comprising at least one of such pumps
IT201800003690A1 (it) * 2018-03-16 2019-09-16 Scarponi Lorenzo S R L Dispositivo dosatore
WO2019175853A1 (en) * 2018-03-16 2019-09-19 Scarponi Lorenzo S.R.L. Dosing device

Also Published As

Publication number Publication date
JP2010053865A (ja) 2010-03-11
EP2160965A1 (de) 2010-03-10
DE102008039973A1 (de) 2010-03-04
EP2160965B1 (de) 2012-10-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: WMF WURTTEMBERGISCHE METALLWARENFABRIK AG,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DOLLNER, SANDER;STARTZ, ARMIN;SIGNING DATES FROM 20090825 TO 20091109;REEL/FRAME:023528/0481

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION