EP0713974B1 - Moineau pump - Google Patents
Moineau pump Download PDFInfo
- Publication number
- EP0713974B1 EP0713974B1 EP95118444A EP95118444A EP0713974B1 EP 0713974 B1 EP0713974 B1 EP 0713974B1 EP 95118444 A EP95118444 A EP 95118444A EP 95118444 A EP95118444 A EP 95118444A EP 0713974 B1 EP0713974 B1 EP 0713974B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- stator
- reference plane
- axis
- eccentric screw
- 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
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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
- 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
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- 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
- F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
Definitions
- the invention relates to an eccentric screw pump according to the preamble of claim 1.
- the screw conveyor is firmly connected to the coupling rod so that it participates in its tumbling movements.
- the screw conveyor is fastened to a tube which is mounted coaxially with the drive shaft and through which the coupling rod extends.
- a generic eccentric screw pump is known (DE-U 71 03 501), in which the screw conveyor is attached to the end of the rotor remote from the coupling rod. In all of these cases, the screw conveyor is arranged below a feed hopper through which the medium to be conveyed is fed.
- a generic eccentric screw pump for separating solids and liquids is also known (DE-A 16 36 02), in which the screw conveyor and the storage space accommodating it are arranged on the pressure side of the rotor and stator.
- the screw conveyor has the task of further transporting the dry materials conveyed by the rotor.
- the invention is therefore based on the object of increasing the throughput of an eccentric screw pump of the type described for given dimensions of the rotor and the screw conveyor.
- the invention is particularly important in such generic progressing cavity pumps in which the screw conveyor is arranged upstream of the rotor, that is to say on the suction side.
- the arrangement of the rotor-side screw end according to the invention ensures that the material to be conveyed from Screw end is pushed directly into the stator chamber, so that it is largely filled.
- the actual eccentric screw pump, consisting of the stator and rotor works with a particularly high degree of filling.
- the invention is also advantageous in eccentric screw pumps in which a screw is arranged downstream of the rotor, that is to say on the pressure side.
- the end of the screw on the rotor side takes over the material to be conveyed without any significant delay when it exits the stator chamber. This relieves the stator chamber of dynamic pressure, which also contributes to increasing the performance of the actual eccentric screw pump consisting of the stator and rotor.
- the invention has proven itself primarily in eccentric screw pumps with a two-speed stator and a correspondingly single-speed rotor;
- the measures according to the invention can also advantageously be used in progressing cavity pumps with three- or more-speed stator chambers and, accordingly, two-or more-speed rotors, as are known from the basic patents of René Joseph Louis Moineau (e.g. DE 633 784).
- the eccentric screw pump shown in FIGS. 1 and 2 has a stator 10 of conventional design with a stator chamber 12 which is coiled around a stator axis 14 and adjoins a funnel 16 which facilitates the inflow of pumped medium into the stator chamber 12.
- the funnel 16 ends and the stator chamber 12 begins in a reference plane 18 normal to the stator axis 14.
- a rotor 20 is arranged in the stator chamber 12 and has a circular cross section at any point; the center points of all cross sections form a center line 22, which is wound around a rotor axis 24 parallel to the stator axis 14.
- the rotor 20 is connected by a joint 26 to a coupling rod 28, which is connected in the usual and therefore not shown manner via a further, generally identical joint to a stationary drive shaft.
- the joints 26 can be omitted if the coupling rod 28 is sufficiently long and elastic.
- rotation of the drive shaft is transmitted to the rotor 20 via the coupling rod 28 in such a way that it rotates about its own rotor axis 24 and rotates it around the stator axis 14 as the generator of an imaginary cylindrical surface area; the cylindrical surface is indicated in Fig. 2 as a dash-dotted circle.
- the stator 10 is fastened to a housing 30 which is arranged upstream of it and which encloses a storage space 32.
- the coupling rod 28 and the joint 26 are arranged, which in the example shown has a joint pin 34 with a pin axis 36 parallel to the reference plane 18.
- the coupling rod 28 extends through a tube 38 which is rigidly connected either to the drive shaft mentioned or to the coupling rod 28.
- a screw conveyor 40 is coiled around the articulation 26, which is attached to the pipe 38 according to FIG. 1, for example welded on, and radially outside the articulation 26 has a screw end 42 in the form of a radial edge parallel to the reference plane 18.
- the radial distance between the screw conveyor 40 and thus also the screw end 42 from the joint 26 is shown exaggeratedly large in FIG. 1 in order to clarify that the screw conveyor 40 does not touch the joint 26 in this example.
- the stator chamber 12 appears in the reference plane 18 as an oval with the main axis vertical according to FIG. 2; when viewing the stator 10 in the axial direction from the storage space 32, the aforementioned funnel 16 can be seen in addition to this oval.
- the circular cross section of the rotor 20 in the reference plane 18 first moves downward and then up again in the course of a full rotor revolution.
- the first position shown in FIG. 2 at the angle of rotation 0 ° is an upper edge position in which the rotor 20 conforms to the upper, semicircular rounding of the oval, so that an undivided conveying cross-sectional area 44 remains free below the rotor cross section shown.
- the screw end 42 In this rotor position, the screw end 42 extends vertically downward, so that its projection into the reference plane 18 appears in the middle of the free conveying cross-sectional area 44.
- This preferred arrangement is drawn with thick lines in FIG. 2; it is offset from the zero position of the rotor 20 by an angle a, which is preferably 180 °.
- the arrangement of the screw end 42 as indicated by dashed and dash-dotted lines, can deviate from the preferred arrangement by an angle b, which should preferably not be greater than 45 °.
- the screw conveyor 40 ie also the screw end 42, rotates with the rotor 20 at an approximately constant angular velocity.
- Fig. 2 eight rotational angle positions of the rotor 20 and screw end 42 are shown offset by 45 °. From these representations it can be seen that material displaced from the screw conveyor 40 and flowing out via the screw end 42 is largely immediate and only to a smaller extent Part of the funnel 16 reaches the stator chamber 12, so that there is hardly any possibility of jamming in the funnel 16. As a result, the eccentric screw pump operates with a particularly high degree of filling of the stator chamber 12.
- FIG. 3 differs from that shown in FIG. 1 primarily in that the screw conveyor 40 is attached directly to the housing of the joint 26 and is much shorter.
- the joint 26 is shown in FIG. 3 as an arch tooth joint. Regardless of these differences, the functional representation in FIG. 2 also applies to the exemplary embodiment according to FIG. 3.
Description
Die Erfindung betrifft eine Exzenterschneckenpumpe nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an eccentric screw pump according to the preamble of claim 1.
Bei den meisten bekannten Exzenterschneckenpumpen dieser Gattung (DE-A 12 77 819, DE-A 15 53 201, DE-A 15 57 211, DE-A 16 78 472, DE-A 19 63 681 und DE-U 69 16 941) ist die Förderschnecke rings um eine Kuppelstange angeordnet, die an einem ihrer beiden Enden mit dem Rotor und an dem anderen Ende mit einer ortsfest gelagerten Antriebswelle verbunden ist, wobei entweder diese beiden Verbindungen gelenkig sind oder die Kuppelstange insgesamt biegsam ist. Eine solche Kuppelstange führt im Betrieb taumelnde Bewegungen aus, bei der ihre Längsachse Erzeugende einer gedachten Kegelmantelfläche ist. Bei einigen dieser bekannten Exzenterschneckenpumpen (z.B. DE-U 69 16 941) ist die Förderschnecke mit der Kuppelstange fest verbunden, so daß sie an deren taumelnden Bewegungen teilnimmt. In anderen Fällen (z.B. DE-A 16 78 472) ist die Förderschnecke auf einem Rohr befestigt, das gleichachsig mit der Antriebswelle ortsfest gelagert ist, und durch das sich die Kuppelstange hindurch erstreckt. Ferner ist eine gattungsgemäße Exzenterschneckenpumpe bekannt (DE-U 71 03 501), bei der die Förderschnecke am von der Kuppelstange entfernten Ende des Rotors befestigt ist. In all diesen Fällen ist die Förderschnecke unterhalb eines Beschikkungstrichters angeordnet, durch den das zu fördernde Medium zugeführt wird.In most known eccentric screw pumps of this type (DE-A 12 77 819, DE-A 15 53 201, DE-A 15 57 211, DE-A 16 78 472, DE-A 19 63 681 and DE-U 69 16 941) the screw conveyor is arranged around a coupling rod which is connected at one of its two ends to the rotor and at the other end to a stationary drive shaft, either these two connections being articulated or the coupling rod being flexible overall. Such a coupling rod performs wobbling movements during operation, in which its longitudinal axis is the product of an imaginary conical surface. In some of these known eccentric screw pumps (eg DE-U 69 16 941), the screw conveyor is firmly connected to the coupling rod so that it participates in its tumbling movements. In other cases (eg DE-A 16 78 472), the screw conveyor is fastened to a tube which is mounted coaxially with the drive shaft and through which the coupling rod extends. Furthermore, a generic eccentric screw pump is known (DE-U 71 03 501), in which the screw conveyor is attached to the end of the rotor remote from the coupling rod. In all of these cases, the screw conveyor is arranged below a feed hopper through which the medium to be conveyed is fed.
Es ist aber auch eine gattungsgemäße Exzenterschneckenpumpe zum Trennen von Feststoffen und Flüssigkeiten bekannt (DE-A 16 36 02), bei der die Förderschnecke und der sie aufnehmende Stauraum auf der Druckseite des Rotors und Stators angeordnet sind. In diesem Fall hat die Förderschnecke die Aufgabe, die vom Rotor geförderten Trockenstoffe weiter zu transportieren.However, a generic eccentric screw pump for separating solids and liquids is also known (DE-A 16 36 02), in which the screw conveyor and the storage space accommodating it are arranged on the pressure side of the rotor and stator. In this case, the screw conveyor has the task of further transporting the dry materials conveyed by the rotor.
Bei der Anordnung der Förderschnecke in bezug auf den Rotor ist im Stand der Technik eine Regel nicht erkennbar. In den meisten Fällen (z.B. DE-A 16 78 472 und DE-A 19 63 681) endet die Förderschnecke vor einem Gelenk, das die Kuppelstange mit dem Rotor verbindet. Es sind aber auch Anordnungen bekannt (z.B. DE-A 15 53 201), bei denen die Förderschnecke ungefähr in derselben zur Rotorachse normalen Ebene endet, in welcher der Rotor beginnt. Dadurch soll das zu fördernde Medium offensichtlich gehindert werden, sich rings um die Verbindungsstelle zwischen der Kuppelstange und dem Rotor, unmittelbar vor dem Eintritt in die Statorkammer, zu stauen. Dennoch ist der mit einer Förderschnecke erzielbare Gewinn an Förderleistung bei den bekannten gattungsgemäßen Exzenterschneckenpumpen im allgemeinen nicht befriedigend.A rule cannot be recognized in the prior art when arranging the screw conveyor in relation to the rotor. In most cases (e.g. DE-A 16 78 472 and DE-A 19 63 681) the screw conveyor ends in front of a joint that connects the coupling rod to the rotor. However, arrangements are also known (e.g. DE-A 15 53 201) in which the screw conveyor ends approximately in the plane normal to the rotor axis in which the rotor begins. This is intended to obviously prevent the medium to be conveyed from jamming around the connection point between the coupling rod and the rotor, immediately before entering the stator chamber. Nevertheless, the gain in conveying capacity which can be achieved with a screw conveyor is generally unsatisfactory in the known eccentric screw pumps of the generic type.
Der Erfindung liegt deshalb die Aufgabe zugrunde, den Durchsatz einer Exzenterschneckenpumpe der beschriebenen Gattung bei gegebenen Abmessungen des Rotors und der Förderschnecke zu steigern.The invention is therefore based on the object of increasing the throughput of an eccentric screw pump of the type described for given dimensions of the rotor and the screw conveyor.
Die Aufgabe ist erfindungsgemäß mit den Merkmalen des Patentanspruchs 1 gelöst.The object is achieved with the features of claim 1.
Die Erfindung ist vor allem bei solchen gattungsgemäßen Exzenterschneckempumpen von Bedeutung, bei denen die Förderschnecke förderstromaufwärts vom Rotor, also saugseitig, angeordnet ist. In diesem Fall wird mit der erfindungsgemäßen Anordnung des rotorseitigen Schneckenendes erreicht, daß das Fördergut vom Schneckenende unmittelbar in die Statorkammer hineingedrängt wird, so daß diese weitgehend gefüllt wird. Die eigentliche, aus Stator und Rotor bestehende Exzenterschneckenpumpe arbeitet infolgedessen mit einem besonders hohen Füllungsgrad.The invention is particularly important in such generic progressing cavity pumps in which the screw conveyor is arranged upstream of the rotor, that is to say on the suction side. In this case, the arrangement of the rotor-side screw end according to the invention ensures that the material to be conveyed from Screw end is pushed directly into the stator chamber, so that it is largely filled. As a result, the actual eccentric screw pump, consisting of the stator and rotor, works with a particularly high degree of filling.
Die Erfindung ist aber auch bei Exzenterschneckenpumpen vorteilhaft, bei denen eine Schnecke förderstromabwärts vom Rotor, also druckseitig, angeordnet ist. In diesem Fall übernimmt das rotorseitige Ende der Förderschnecke das Fördergut ohne nennenswerte Verzögerung bei dessen Austritt aus der Statorkammer. Dadurch wird die Statorkammer von Staudruck entlastet, was ebenfalls zur Erhöhung der Leistungsfähigkeit der eigentlichen, aus Stator und Rotor bestehenden Exzenterschneckpumpe beiträgt.However, the invention is also advantageous in eccentric screw pumps in which a screw is arranged downstream of the rotor, that is to say on the pressure side. In this case, the end of the screw on the rotor side takes over the material to be conveyed without any significant delay when it exits the stator chamber. This relieves the stator chamber of dynamic pressure, which also contributes to increasing the performance of the actual eccentric screw pump consisting of the stator and rotor.
Die Erfindung hat sich in erster Linie bei Exzenterschneckenpumpen mit zweigängigem Stator und dementsprechend eingängigem Rotor bewährt; die erfindungsgemäßen Maßnahmen lassen sich aber mit Vorteil auch bei Exzenterschneckenpumpen mit drei- oder mehrgängigen Statorkammern und dementsprechend zwei- oder mehrgängigen Rotoren anwenden, wie sie aus den grundlegenden Patenten von René Joseph Louis Moineau (z.B. DE 633 784) bekannt sind.The invention has proven itself primarily in eccentric screw pumps with a two-speed stator and a correspondingly single-speed rotor; However, the measures according to the invention can also advantageously be used in progressing cavity pumps with three- or more-speed stator chambers and, accordingly, two-or more-speed rotors, as are known from the basic patents of René Joseph Louis Moineau (e.g. DE 633 784).
Besonders vorteilhafte Ausführungsformen der Erfindung ergeben sich aus den Unteransprüchen.Particularly advantageous embodiments of the invention result from the subclaims.
Einzelheiten der Erfindung werden im folgenden anhand schematischer Zeichnungen von Ausführungbeispielen näher erläutert.
Es zeigen:
- Fig. 1
- einen axialen Teilschnitt durch eine erfindungsgemäße Exzenterschneckenpumpe,
- Fig. 2
- den Querschnitt II-II in Fig. 1 in acht aufeinanderfolgenden Betriebsstellungen und
- Fig. 3
- einen der Fig. 1 entsprechenden axialen Teilschnitt durch eine andere erfindungsgemäße Exzenterschneckenpumpe.
Show it:
- Fig. 1
- an axial partial section through an eccentric screw pump according to the invention,
- Fig. 2
- the cross section II-II in Fig. 1 in eight successive operating positions and
- Fig. 3
- an axial partial section corresponding to FIG. 1 through another eccentric screw pump according to the invention.
Die in Fig. 1 und 2 dargestellte Exzenterschneckenpumpe hat einen Stator 10 üblicher Bauart mit einer Statorkammer 12, die um eine Statorachse 14 zweigängig gewendelt ist und sich an einen Trichter 16 anschließt, der das Einströmen von Fördermedium in die Statorkammer 12 erleichtert. Der Trichter 16 endet und die Statorkammer 12 beginnt in einer zur Statorachse 14 normalen Bezugsebene 18.The eccentric screw pump shown in FIGS. 1 and 2 has a
In der Statorkammer 12 ist ein Rotor 20 angeordnet, der an jeder beliebigen Stelle einen kreisförmigen Querschnitt hat; die Mittelpunkte sämtlicher Querschnitte bilden eine Mittellinie 22, welche um eine zur Statorachse 14 parallele Rotorachse 24 gewendelt ist. Der Rotor 20 ist durch ein Gelenk 26 mit einer Kuppelstange 28 verbunden, die in üblicher und deshalb nicht dargestellter Weise über ein weiteres, im allgemeinen gleiches Gelenk mit einer ortsfest gelagerten Antriebswelle verbunden ist. Die Gelenke 26 können weggelassen werden, wenn die Kuppelstange 28 genügend lang und elastisch ist. In jedem Fall überträgt sich eine Drehung der Antriebswelle über die Kuppelstange 28 derart auf den Rotor 20, daß er sich um seine eigene Rotorachse 24 dreht und diese als Erzeugende einer gedachten Zylindermantelfläche um die Statorachse 14 rotiert; die Zylindermantelfläche ist in Fig. 2 als strichpunktierter Kreis angedeutet.A
Der Stator 10 ist an einem förderstromaufwärts von ihm angeordneten Gehäuse 30 befestigt, das einen Stauraum 32 umschließt. In diesem Stauraum 32 sind die Kuppelstange 28 und das Gelenk 26 angeordnet, welches im dargestellten Beispiel einen Gelenkbolzen 34 mit zur Bezugsebene 18 paralleler Bolzenachse 36 aufweist. Die Kuppelstange 28 erstreckt sich durch ein Rohr 38 hindurch, das entweder mit der erwähnten Antriebswelle oder mit der Kuppelstange 28 starr verbunden ist. Um das Rohr 38 und das dargestellte Gelenk 26 herum ist eine Förderschnecke 40 gewendelt, die gemäß Fig. 1 am Rohr 38 befestigt, beispielsweise angeschweißt ist und radial außerhalb des Gelenks 26 ein Schneckenende 42 in Form einer radialen, zur Bezugsebene 18 parallelen Kante aufweist. Der radiale Abstand der Förderschnecke 40- und somit auch des Schneckenendes 42- vom Gelenk 26 ist in Figur 1 übertrieben groß dargestellt, um zu verdeutlichen, daß die Förderschnecke 40 in diesem Beispiel das Gelenk 26 nicht berührt.The
Die Statorkammer 12 erscheint in der Bezugsebene 18 als Oval mit gemäß Fig. 2 senkrechter Hauptachse; bei Betrachtung des Stators 10 in axialer Richtung vom Stauraum 32 aus ist zusätzlich zu diesem Oval der genannte Trichter 16 erkennbar. In diesem Oval bewegt sich der kreisförmige Querschnitt des Rotors 20 in der Bezugsebene 18 im Laufe einer vollen Rotorumdrehung erst abwärts und dann wieder aufwärts. Die erste in Fig. 2 abgebildete Stellung bei dem Drehwinkel 0° ist eine obere Randstellung, in der sich der Rotor 20 an die obere, halbkreisförmige Rundung des Ovals anschmiegt, so daß unterhalb des dargestellten Rotorquerschnitts eine ungeteilte Förderquerschnittsfläche 44 frei bleibt. In dieser Rotorstellung erstreckt sich das Schneckenende 42 senkrecht nach unten, so daß seine Projektion in die Bezugsebene 18 in der Mitte der freien Förderquerschnittsfläche 44 erscheint. Diese bevorzugte Anordnung ist in Fig. 2 mit dicken Linien gezeichnet; sie ist gegen die Nullstellung des Rotors 20 um einen Winkel a versetzt, der vorzugsweise 180° beträgt. Bei Varianten der Erfindung kann die Anordnung des Schneckenendes 42, wie mit gestrichelten und strichpunktierten Linien angedeutet, von der bevorzugten Anordnung um einen Winkel b abweichen, der vorzugsweise nicht größer als 45° sein sollte.The
Die Förderschnecke 40, also auch das Schneckenende 42, dreht sich mit dem Rotor 20 mit annähernd konstanter Winkelgeschwindigkeit. In Fig. 2 sind acht um je 45° gegeneinander versetzte Drehwinkelstellungen des Rotors 20 und Schneckenendes 42 dargestellt. Aus diesen Darstellungen ist ersichtlich, daß von der Förderschnecke 40 verdrängtes, über das Schneckenende 42 abströmendes Fördergut größtenteils unmittelbar und nur zum kleineren Teil über den Trichter 16 in die Statorkammer 12 gelangt, so daß es kaum eine Möglichkeit hat, sich im Trichter 16 zu stauen. Infolgedessen arbeitet die Exzenterschneckenpumpe mit besonders hohem Füllungsgrad der Statorkammer 12.The
Das Ausführungsbeispiel gemäß Fig. 3 unterscheidet sich von dem in Fig. 1 dargestellten vor allem dadurch, daß die Förderschnecke 40 unmittelbar am Gehäuse des Gelenks 26 befestigt und sehr viel kürzer ausgeführt ist. Das Gelenk 26 ist in Fig. 3 als Bogenzahngelenk dargestellt. Unabhängig von diesen Unterschieden gilt die Funktionsdarstellung in Fig. 2 auch für das Ausführungsbeispiel gemäß Fig. 3.The embodiment of FIG. 3 differs from that shown in FIG. 1 primarily in that the
Claims (3)
- An eccentric screw pump especially for conveying media having high viscosity or a high solids content, comprising- a stator chamber (12) which, starting from a reference plane (18) normal with respect to the central stator axis (14), has an at least twin-threaded coil,- a rotor (20) which has a number of threads that is lower by 1 than that of the stator chamber (12), is coiled about a rotor axis (24) parallel to the stator axis (14), and is adapted to be driven so as to rotate eccentrically about the stator axis (14), its rotation appearing in the reference plane (18) as a movement in pendulum fashion between boundary positions in which it leaves an uninterrupted or continuous conveying cross-sectional area (44) of the stator chamber (12) open in each case,- a retaining space (32) arranged in series with the stator chamber (12), and- a worm conveyor (40) that is arranged in series with the rotor (20), is adapted to be driven for rotation along with it, and has a rotor facing worm end (42),characterized in that the rotor facing worm end (42) is arranged in an angle of rotation position with respect to the rotor (20) in which the worm end (42), projected into the reference plane (18), extends in each case through the uninterrupted conveying cross-sectional area (44) of the stator chamber (12) when the rotor (20) assumes one of its boundary positions in the reference plane (18).
- The eccentric screw pump according to claim 1,
characterized in that when the rotor (20) assumes one of its boundary positions in the reference plane (18), the projection of the rotor facing worm end (42) into the reference plane (18) lies in an area of 45° each at either side of the common normal line of the stator axis (14) and the rotor axis (24), said normal line lying in the reference plane (18). - The eccentric screw pump according to claim 2,
characterized in that the projection of the rotor facing worm end (42) into the reference plane (18) lies on the common normal line of the stator axis and the rotor axis (14, 24).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4442060 | 1994-11-25 | ||
| DE4442060A DE4442060C1 (en) | 1994-11-25 | 1994-11-25 | Eccentric screw pump for highly viscous media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0713974A1 EP0713974A1 (en) | 1996-05-29 |
| EP0713974B1 true EP0713974B1 (en) | 1997-10-22 |
Family
ID=6534184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95118444A Expired - Lifetime EP0713974B1 (en) | 1994-11-25 | 1995-11-23 | Moineau pump |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0713974B1 (en) |
| DE (2) | DE4442060C1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003048579A2 (en) | 2001-12-04 | 2003-06-12 | Kag Holding A/S | Screw pump for transporting emulsions susceptible to mechanical handling |
| EP1522729B2 (en) * | 2003-10-07 | 2013-03-27 | Johann Heinrich Bornemann GmbH - Kunststofftechnik Obernkirchen - | Progressive cavity pump and stator for such a pump |
| EP1691076A1 (en) | 2005-01-27 | 2006-08-16 | Nordson Corporation | Application apparatus comprising a volumetric pump |
| DE102006036243A1 (en) * | 2006-08-03 | 2008-02-14 | Netzsch-Mohnopumpen Gmbh | Feed screw for eccentric screw pump |
| DE102007058412A1 (en) * | 2007-12-03 | 2009-06-04 | Bartec Dispensing Technology Gmbh | Viscous material e.g. adhesive, conditioning device for use in processing device, has agitator driven by motor and feed pump that is connected to downstream of container, where pump is driven by motor |
| DE102012001617A1 (en) | 2012-01-30 | 2013-08-01 | Netzsch Pumpen & Systeme Gmbh | Conveying device e.g. spindle pump, for conveying e.g. fluid in food industry, has reservoir, inlet, outlet, rotor and stator, where reservoir is designed recess- and/or projection-free manner, and sealing unit cooled by washable mediums |
| DE102016009028A1 (en) * | 2016-07-26 | 2018-02-01 | Netzsch Pumpen & Systeme Gmbh | Rotor-stator system with an inlet funnel for an eccentric screw pump |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE633784C (en) * | 1935-03-21 | 1936-08-06 | Rene Joseph Louis Moineau | Device that can be used as a pump, motor or transmission element or the like |
| DE1678472B1 (en) * | 1963-05-02 | 1970-06-04 | Netzsch Maschinenfabrik | Feed device for eccentric screw pumps |
| DE1636302A1 (en) * | 1965-03-17 | 1970-10-08 | Eugen Soeding | Eccentric screw pump |
| DE1277819B (en) * | 1965-05-12 | 1968-09-19 | Karl Schlecht Dipl Ing | Device for continuous mixing of powdery to fine-grained bulk material |
| DE1553201A1 (en) * | 1966-04-27 | 1971-02-18 | Schlecht Karl | Eccentric screw pump with centric agitator screw |
| DE1557211A1 (en) * | 1967-02-22 | 1970-07-02 | Schlecht Dipl Ing Karl | Stirring shaft for mixing pumps |
| DE6916941U (en) * | 1969-04-26 | 1969-08-21 | G A Kiesel Ges Mit Beschraenkt | Eccentric screw pump |
| DE1963681C3 (en) * | 1969-12-19 | 1974-11-21 | Foerdertechnik Streicher Gmbh, 7953 Bad Schussenried | Multi-way tubular rotary valve on an eccentric screw pump that can be used as a thick matter pump |
| DE7103501U (en) * | 1971-01-30 | 1971-04-29 | Gebrueder Netzsch Maschinenfabrik | FEEDING DEVICE FOR AN ECCENTRIC SCREW PUMP |
| DE4121717C2 (en) * | 1991-06-07 | 1995-01-26 | Allweiler Ag | Screw pump, in particular eccentric screw pump |
-
1994
- 1994-11-25 DE DE4442060A patent/DE4442060C1/en not_active Expired - Fee Related
-
1995
- 1995-11-23 EP EP95118444A patent/EP0713974B1/en not_active Expired - Lifetime
- 1995-11-23 DE DE59500853T patent/DE59500853D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE4442060C1 (en) | 1996-03-14 |
| DE59500853D1 (en) | 1997-11-27 |
| EP0713974A1 (en) | 1996-05-29 |
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