EP1338796B1 - Moineau Pump - Google Patents

Moineau Pump Download PDF

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Publication number
EP1338796B1
EP1338796B1 EP03002763A EP03002763A EP1338796B1 EP 1338796 B1 EP1338796 B1 EP 1338796B1 EP 03002763 A EP03002763 A EP 03002763A EP 03002763 A EP03002763 A EP 03002763A EP 1338796 B1 EP1338796 B1 EP 1338796B1
Authority
EP
European Patent Office
Prior art keywords
screw
rotor
progressive cavity
pump according
flexible shaft
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.)
Expired - Lifetime
Application number
EP03002763A
Other languages
German (de)
French (fr)
Other versions
EP1338796A2 (en
EP1338796A3 (en
Inventor
Reinhard Denk
Bernhard Murrenhof
Christopher Martin Gwalchmai
Johann Kreidl
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 EP1338796A2 publication Critical patent/EP1338796A2/en
Publication of EP1338796A3 publication Critical patent/EP1338796A3/en
Application granted granted Critical
Publication of EP1338796B1 publication Critical patent/EP1338796B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04C2/10—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

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

Abstract

The eccentric peristaltic pump for viscous fluids has the suction and feed shaft of the pump is coaxial to the curved shaft of the feed hose. The curved shaft has both ends connected via rigid couplings to the rotor (34) and the drive shaft (54). The tensioning movement of the feed hose is between point zero five and point five times the rotor diameter.

Description

Die Erfindung betrifft eine Exzenterschneckenpumpe, bestehend aus einem Pumpenteil mit einem rohrförmigen Pumpengehäuse, mit einer Statorauskleidung mit einem entsprechend einer zwei- oder mehrgängigen Schnecke geformten Pumpenhohlraum, mit einem Beschickungsgehäuse und mit einem Antrieb und mit einem schneckenförmigen Rotor, der mittels einer biegsamen Welle mit einer Antriebswelle verbunden ist und die biegsame Welle an ihren beiden Enden über starre Kupplungselemente mit dem Rotor und der Antriebswelle verbunden ist.The invention relates to an eccentric screw pump, consisting of a pump part with a tubular pump housing, with a Statorauskleidung with a corresponding two-or multi-start screw shaped pump cavity, with a charging housing and with a drive and with a helical rotor, by means of a flexible shaft with a Drive shaft is connected and the flexible shaft is connected at its two ends via rigid coupling elements with the rotor and the drive shaft.

Ein derartiger Pumpenaufbau ist bekannt aus der EP 0 657 649 B1. Die dort eingesetzte biegsame Welle besitzt einen großen radialen Abstand zum Einlassgehäuse. Die biegsame Welle ist hier durch eine Schraubenverbindung mit der Antriebswelle und über eine Kupplung, die das Drehmoment über einen Stift überträgt, mit dem Rotorkopf verbunden. Der Stift wird von einer auf den Rotorkopf aufschiebbaren Muffe abgedeckt. Das dem Einlassgehäuse zugeführte Produkt gelangt allein vom eingeleiteten Druck und der Saugleistung der Pumpe in den Rotor-/Statorbereich.Such a pump construction is known from EP 0 657 649 B1. The flexible shaft used there has a large radial distance from the inlet housing. The flexible shaft is here by a screw connection to the drive shaft and a coupling which transmits the torque via a pin connected to the rotor head. The pin is covered by a sleeve slid onto the rotor head. The product supplied to the inlet housing passes into the rotor / stator area solely from the introduced pressure and the suction power of the pump.

Aus der DE 15 53 201 A1 geht eine Exzenterschneckenpumpe hervor, bei der eine starre Verbindungswelle zwischen einem schneckenförmigen Rotor und einer Antriebswelle angeordnet ist. Auf dem antriebsseitigen Ende der Verbindungswelle sitzt eine Antriebshülse, die eine fliegend gelagerte Förderschnecke hält und rotieren lässt. Die Förderschnecke erhält eine gewisse Laufruhe und Eigenstabilität dadurch, dass sie sich ständig an der Innenwand am Einlassgehäuse abstützt.From DE 15 53 201 A1 an eccentric screw pump shows, in which a rigid connecting shaft between a helical rotor and a drive shaft is arranged. On the drive-side end of the connecting shaft sits a drive sleeve that holds a flying screw auger and rotate. The auger receives a certain smoothness and inherent stability in that it is constantly supported on the inner wall of the inlet housing.

Der Erfindung liegt die Aufgabe zugrunde, eine Exzenterschneckenpumpe mit einer biegsamen Welle bezüglich des Produkteinzugs zu verbessern.The invention has for its object to improve an eccentric screw pump with a flexible shaft with respect to the product feeder.

Erfindungsgemäss wird die Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Vorteilhafte erfinderische Weiterbildungen sind den Merkmalen der jeweiligen Unteransprüche zu entnehmen.According to the invention the object is achieved by the characterizing features of claim 1. Advantageous inventive developments can be found in the features of the respective subclaims.

Die Erfindung geht von der Kenntnis aus, dass es bei steigender Viskosität des zu fördernden Produkts notwendig wird, im Beschickungsgehäuse der Pumpe eine zusätzliche Förderwirkung zu schaffen. Bisher ist im Zusammenhang mit dem Einsatz von biegsamen Wellen keine Zwangsförderung durch eine zusätzliche Förderschnecke bekannt. Die Erfindung nimmt sich jedoch auch dem Problem der unnötigen Gewichtsbelastung bei einer entsprechender Stabilität der Förderschnecke an. So hat man überraschenderweise erkannt, dass die Förderschnecke je nach Baugrösse mit sehr dünnem und schmalen Material geformt sein kann, wenn das Material unter einer gewissen Vorspannung steht. Diese Vorspannung drückt sich im Spannweg der Förderschnecke aus, der dem 0,05- bis 0,5fachem des Rotordurchmessers entspricht. Die Vorspannung wird auf die Förderschnecke aufgebracht, in dem man die Schnecke um einen Wert entsprechend dem vorgenannten Toleranzbereich positiv verformt. Diese Verformung geschieht durch eine mechanische Streckung der Förderschnecke. Dazu wird die Förderschnecke an einer ihrer Seiten fest an einer Seite der biegsamen Welle bzw. dem an dieser Seite befindlichen Kupplungselement angebracht und nach erfolgter Spreizung an der Gegenseite der biegsamen Welle befestigt.The invention is based on the knowledge that it is necessary with increasing viscosity of the product to be conveyed to create an additional conveying effect in the feed housing of the pump. Up to now, in connection with the use of flexible shafts, there has been no compulsory promotion by an additional one Screw conveyor known. However, the invention also addresses the problem of unnecessary weight loading with a corresponding stability of the screw conveyor. So it has surprisingly been found that the screw conveyor can be shaped depending on the size with very thin and narrow material when the material is under a certain bias. This bias is expressed in the clamping path of the screw, which corresponds to 0.05 to 0.5 times the rotor diameter. The bias is applied to the screw conveyor by positively deforming the screw by a value corresponding to the aforementioned tolerance range. This deformation is done by a mechanical stretching of the screw conveyor. For this purpose, the screw conveyor is fixedly attached to one side of the flexible shaft or the coupling element located on this side on one of its sides and attached to the opposite side of the flexible shaft after spreading.

Entsprechend einer weiteren erfindungsgemässen Ausführung der Erfindung kann der Förderschnecke auch eine negative Vorspannung auferlegt werden, indem die Förderschnecke eine Stauchung erfährt. Der Wert, um den die Förderschnecke gestaucht wird, liegt im gleichen Toleranzbereich wie bei der positiven Vorspannung. Aufgrund der Vorspannung der Förderschnecke bleibt der Schneckenkörper während der Drehbewegung formstabil, während der Biegestab entsprechend der vom Rotor erzeugten Exzentrizität verformt bzw. verwunden wird. Die Gewichtsersparnis, die sich aus der Materialeinsparung für die Förderschnecke ergibt, macht sich positiv auf die Verschleissreduzierung aller rotierender Teile und der damit in Verbindung stehenden Teile bemerkbar.According to a further inventive embodiment of the invention, the screw conveyor can also be imposed a negative bias by the auger experiences a compression. The value by which the screw conveyor is compressed is within the same tolerance range as with the positive preload. Due to the bias of the auger of the screw body remains dimensionally stable during the rotational movement, while the bending rod is deformed or twisted in accordance with the eccentricity generated by the rotor. The weight savings resulting from the material savings for the screw conveyor, has a positive effect on the wear reduction of all rotating parts and the related parts noticeable.

Aus einer weiteren erfindungsgemässen Weiterbildung der Erfindung geht die Verbindung der Förderschnecke mit der biegsamen Welle und/oder der Antriebswelle hervor. So kann die Förderschnecke, die beispielweise an beiden Seiten mit einem angeschweissten Ring versehen ist, entweder mittels Stellschrauben kraft- oder formschlüssige Verbindungen eingehen.From a further inventive development of the invention, the compound of the screw conveyor with the flexible shaft and / or the drive shaft is apparent. Thus, the screw conveyor, which is provided for example on both sides with a welded ring, either by means of screws positive or positive connections received.

Weitere Einzelheiten der Erfindung werden anhand der Zeichnung erläutert, in der ein Ausführungsbeispiel der Erfindung gezeigt ist.
Es zeigt:

  • Fig. 1:
    einen Längsschnitt einer Exzenterschneckenpumpe.
Further details of the invention will be explained with reference to the drawing, in which an embodiment of the invention is shown.
It shows:
  • Fig. 1:
    a longitudinal section of an eccentric screw pump.

Die in Fig. 1 dargestellte Pumpe besteht aus einem Pumpenteil 10, einem Beschickungsgehäuse 12 und einem Gehäuse 14, in oder an dem eine Dichtung 16 und eine Lagerung 18 an- oder untergebracht sind. Ein Stator 20 setzt sich aus einem rohrförmigen Pumpengehäuse 22 und einer Statorauskleidung 24 zusammen. Der Stator wird zwischen zwei Flanschen 26, 26' durch Schrauben 28, 28' verspannt. Die Statorauskleidung 24 verfügt über einen zweigängigen schneckenförmigen Pumpenhohlraum 30.The pump shown in Fig. 1 consists of a pump part 10, a charging housing 12 and a housing 14, in or on which a seal 16 and a bearing 18 are attached or housed. A stator 20 is composed of a tubular pump housing 22 and a stator liner 24. The stator is clamped between two flanges 26, 26 'by screws 28, 28'. The stator liner 24 has a two-flighted helical pump cavity 30.

Am druckseitigen Ende des Stators 20 ist ein Flansch 26 mit einem Anschlußstutzen 32 versehen. Am saugseitigen Ende des Rotors 34, der mit seinem Rotorkopf 36 bis in ein Beschickungsgehäuse 12 hineinragt, stellt ein Kupplungselement 38 die starre Verbindung zur biegsamen Welle 40 sicher. Koaxial zum Biegestab 40 erstreckt sich über dessen gesamte Länge eine Förderschnecke 42, die sowohl zur biegsamen Welle 40 wie auch zur Innenseite des Fördergehäuses einen radialen Abstand aufweist. Mit den beiden an jedem Ende der Förderschnecke 42 festgeschweissten scheibenförmigen Ringelementen 44, 44' geht die Schnecke über die Kupplungselemente 38, 48 eine drehfeste Verbindung mit der biegsamen Welle 40 ein, wozu die Ringelemente 44, 44' mit Schrauben 46, 46' versehen sind. Diese Schrauben 46, 46' bilden eine kraft- oder auch formschlüssige Verbindung mit den Kupplungselementen 38, 48.At the pressure-side end of the stator 20, a flange 26 is provided with a connecting piece 32. At the suction end of the rotor 34, which projects with its rotor head 36 into a charging housing 12, a coupling element 38 ensures the rigid connection to the flexible shaft 40. Coaxial with the bending rod 40 extends over the entire length of a screw conveyor 42 which has a radial distance both to the flexible shaft 40 and to the inside of the conveyor housing. With the two disc-shaped annular elements 44, 44 'fixed at each end of the screw conveyor 42, the screw makes a rotationally fixed connection with the flexible shaft 40 via the coupling elements 38, 48, to which end the ring elements 44, 44' are provided with screws 46, 46 ' , These screws 46, 46 'form a non-positive or positive connection with the coupling elements 38, 48th

Das Kupplungselement 48 ist rohrförmig ausgebildet und nimmt in seinem Hohlraum ein Spannelement 50 auf, durch welches das Kupplungselement 48 mit der biegsamen Welle drehfest verbunden ist. Produkt gelangt in das Beschickungsgehäuse 12 über einen Fülltrichter 52. Das Material der Förderschnecke ist im Ausführungsbeispiel aus Flachmaterial ausgebildet, wobei hierzu bei Bedarf auch Rundmaterial verwendet werden kann. Ebenso können für unterschiedliche Anwendungen unterschiedliche Materialien, wie unterschiedliche Stähle zum Einsatz kommen. Die positive Vorspannung drückt sich im Spannweg der Förderschnecke aus, der dem 0,05 bis 0,5fachen des Rotordurchmessers entspricht, bei Rotoren mit einem Durchmesser von 15 - 180 mm.The coupling element 48 is tubular and receives in its cavity a clamping element 50 through which the coupling element 48 is rotatably connected to the flexible shaft. Product passes into the charging housing 12 via a hopper 52. The material of the screw conveyor is formed in the embodiment of flat material, for which purpose also round material can be used if necessary. Likewise, different materials, such as different steels, can be used for different applications. The positive preload is expressed in the clamping travel of the screw conveyor, which corresponds to 0.05 to 0.5 times the rotor diameter, for rotors with a diameter of 15-180 mm.

Claims (7)

  1. A progressive cavity pump comprising
    - a pump part (10)
    - comprising a tubular pump housing (22) with a stator lining (24) comprising a pump cavity (30) formed in accordance with a two-start or multi-start screw,
    - comprising a feeding cavity (12)
    - comprising a drive
    - comprising a screw-shaped rotor (34) which is connected to a drive shaft (54) by means of a flexible shaft (40)
    - the flexible shaft (40) is connected at both its ends to the rotor (34) and the drive shaft (54) by means of rigid coupling elements (38, 48),
    characterised in
    that the flexible shaft (4) is surrounded by a coaxially arranged conveying screw (42) which under a positive pre-stressing is in the form of an extension or under a negative pre-stress is in the form of a compression.
  2. The progressive cavity pump according to claim 1,
    characterised in
    that the clamping distance of the conveyer screw (42) is 0.05 to 0.5 times the rotor diameter.
  3. The progressive cavity pump according to any one of the preceding claims,
    characterised in
    that the conveyor screw (42) has at least one ring element (44, 44') at one end.
  4. The progressive cavity pump according to claim 5,
    characterised in
    that the flexible shaft (40) has a rigid coupling element (38, 48) at least at one end on which the ring element (44, 44') is fixed.
  5. The progressive cavity pump according to any one of the preceding claims,
    characterised in
    that the conveyor screw (42) is connected positively to the rotor (34) and/or the drive shaft (54).
  6. The progressive cavity pump according to claims 1 to 6,
    characterised in
    that the conveyor screw (42) is connected non-positively or frictionally to the rotor (34) and/or the drive shaft (54).
  7. The progressive cavity pump according to any one of the preceding claims,
    characterised in
    that the conveyor screw (42) is made of flat material.
EP03002763A 2002-02-22 2003-02-07 Moineau Pump Expired - Lifetime EP1338796B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10207483A DE10207483C1 (en) 2002-02-22 2002-02-22 Eccentric peristaltic pump for viscous fluids has curved shaft connected between rotor and drive shaft with latter coaxial
DE10207483 2002-02-22

Publications (3)

Publication Number Publication Date
EP1338796A2 EP1338796A2 (en) 2003-08-27
EP1338796A3 EP1338796A3 (en) 2003-10-29
EP1338796B1 true EP1338796B1 (en) 2006-05-31

Family

ID=7713903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03002763A Expired - Lifetime EP1338796B1 (en) 2002-02-22 2003-02-07 Moineau Pump

Country Status (4)

Country Link
US (1) US7040878B2 (en)
EP (1) EP1338796B1 (en)
AT (1) ATE328201T1 (en)
DE (2) DE10207483C1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060011656A1 (en) * 2004-07-16 2006-01-19 Ming-Te Tu Liquid extruding device
PL2176552T3 (en) * 2007-08-17 2012-10-31 Seepex Gmbh Eccentric worm pump with split stator
US8726981B2 (en) * 2011-06-01 2014-05-20 Baker Hughes Incorporated Tandem progressive cavity pumps
JP2013158747A (en) * 2012-02-08 2013-08-19 Nishihara Environment Co Ltd Sludge dehydration system
US8967985B2 (en) 2012-11-13 2015-03-03 Roper Pump Company Metal disk stacked stator with circular rigid support rings
DE102014116779B4 (en) * 2014-11-17 2016-07-21 Pumpenfabrik Wangen Gmbh System for conveying viscous media and method for conveying a viscous medium with such a system
DE102015104300B4 (en) * 2015-03-23 2016-12-01 Pumpenfabrik Wangen Gmbh Eccentric screw pump and method for removing a stator from such an eccentric screw pump
FR3133065B1 (en) * 2022-02-28 2024-03-15 Pcm Tech Pumping device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE37294C (en) * STREHLE in München, Amalienstr. 77 I Brake device on bicycles. 0
DE1553201A1 (en) * 1966-04-27 1971-02-18 Schlecht Karl Eccentric screw pump with centric agitator screw
DE6916941U (en) * 1969-04-26 1969-08-21 G A Kiesel Ges Mit Beschraenkt Eccentric screw pump
DE2316127A1 (en) * 1973-03-30 1974-10-10 Netzsch Mohnopumpen Gmbh Eccentric screw pump
GB2284646B (en) * 1993-12-09 1996-01-10 Mono Pumps Ltd Rotor and flexible drive shaft assembly
JPH07223718A (en) * 1994-02-10 1995-08-22 Denyou Kakoki Kk Screw pump
DE4408659A1 (en) * 1994-03-15 1995-09-21 Koch Marmorit Gmbh Device for pumping viscous materials
JPH07328698A (en) * 1994-05-31 1995-12-19 Heishin Sobi Kk Sampling pump for dehydrated cake
JPH1077974A (en) * 1996-09-03 1998-03-24 Heishin Sobi Kk Single-shaft eccentric screw pump
JP2000145660A (en) * 1998-11-04 2000-05-26 Shin Nippon Machinery Co Ltd Uniaxial eccentric screw pump
JP2001271764A (en) * 2000-03-27 2001-10-05 Shin Nippon Machinery Co Ltd Single shaft eccentric screw pump

Also Published As

Publication number Publication date
US7040878B2 (en) 2006-05-09
DE10207483C1 (en) 2003-06-18
EP1338796A2 (en) 2003-08-27
DE50303530D1 (en) 2006-07-06
ATE328201T1 (en) 2006-06-15
EP1338796A3 (en) 2003-10-29
US20040028546A1 (en) 2004-02-12

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