EP2063125A1 - Moineau pump - Google Patents
Moineau pump Download PDFInfo
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- EP2063125A1 EP2063125A1 EP07021379A EP07021379A EP2063125A1 EP 2063125 A1 EP2063125 A1 EP 2063125A1 EP 07021379 A EP07021379 A EP 07021379A EP 07021379 A EP07021379 A EP 07021379A EP 2063125 A1 EP2063125 A1 EP 2063125A1
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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
- 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
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
- F04C2250/201—Geometry of the rotor conical shape
Definitions
- the invention relates to a Moineau pump or a progressing cavity pump or eccentric screw compressor.
- Moineau or progressing cavity pumps are z. B. off US 1,892,217 known. These pumps have an annular outer member and an inner member disposed inside the outer member. Both the inside of the outer member and the outer side of the inner member have a helical structure, and the structure of the outer member has one more helix or one tooth.
- the inner element moves in the interior of the outer element relative to this on an eccentric path, for which purpose the inner and / or the outer element can be moved.
- the Moineau pump according to the invention or the Moineau compressor has a conically formed inner and a conically formed outer element.
- the inner element has a central conical recess.
- the outer element is annular in a known manner and has on its inner circumference a helical or helical structure.
- the inner element is correspondingly formed helically on its outer circumference, wherein the helical structure of the outer element has a tooth or thread more than the structure on the outer circumference of the inner element.
- the inner and outer members are arranged relative to one another such that their respective longitudinal axes are at an angle to each other and intersect at a point.
- the pump is divided in the axial direction, ie in the conveying direction into at least two sections.
- each section has a part of the outer element and a part of the inner element.
- the parts of the inner element and the parts of the outer element are arranged rotated in the at least two sections against each other. That is, the portion of the inner member located in the second portion is twisted about the longitudinal axis of the inner member by a predetermined angle from the portion of the inner member located in the first portion.
- the part of the outer element located in the second section is rotated by a certain angle relative to the part of the outer element located in the first section about the longitudinal axis of the outer element.
- the offset in the rotational direction or twisted arrangement of the several sections or stages of the Moineau pump is achieved in that the axial force peaks do not occur at the same angular position of a drive shaft and the inner and outer element to each other, but rather occur the Axialkraftspitzen in both sections at different angles of rotation. In this way, the maximum occurring axial force is reduced because the axial force peaks do not add to the same angular position. Rather, the course of the axial force over the rotation angle of the drive shaft with twisted arrangement of the sections to each other so that a larger number of Axialkraftspitzen, but with lower amplitude occurs. Overall, a smoothed Axialkraftverlauf is thus achieved over the rotation angle. This reduces the overall load on the pump drive.
- the maximum occurring axial force also requires only a smaller axial pressure force to hold the outer and inner elements in abutment. This in turn reduces the friction between the inner and outer elements, which reduces wear and also reduces the required starting torque. As a result, the overall efficiency can be improved.
- the pump has more than two sections or steps, wherein in each case in two adjoining sections, the part of the inner element located in a second section is arranged rotated relative to the part of the inner element situated in a first section about the longitudinal axis of the inner element is. Accordingly, the portion of the outer member located in the second portion is opposite the portion of the outer member located in the first portion about the longitudinal axis of the outer member arranged twisted.
- all adjacent sections are preferably formed such that they form a first and a second section, in which the outer and inner elements are arranged rotated relative to one another as described.
- the outer and inner members in the second portion opposite the inner and outer members in the first portion and then again in the third portion are the outer and inner members opposite the outer and inner members in the second Section twisted. Accordingly, in turn, in the fourth section, the outer and inner elements are then rotated relative to the outer and inner elements in the third section. In the case of even more sections, this continues accordingly.
- the rotation from section to section preferably takes place in the same direction of rotation, so that overall all sections are rotated relative to one another and there are no two sections in which the outer or inner elements are arranged in the same angular orientation with respect to their longitudinal axis. This means that the angle by which the parts are rotated relative to each other can be dependent on the number of sections, so that between the first and last section the rotation of the parts is less than 360 °.
- the parts of the inner element are rotated by a different angle to each other than the parts of the outer element. Due to the different number of threads on the inner and outer element, a particularly uniform running of the pump can be achieved.
- the helical contour on the outer circumference of the inner element in all sections of the pump on the same slope. Accordingly, it is preferred that the helical contour on the inner circumference of the outer element in all sections of the Pump has the same slope. That is, the pitch of the thread of the inner and outer members is constant over the entire pump. More preferably, the number of revolutions of the threads in each section is the same.
- n is the number of sections of the pump
- m is the number of threads or teeth of the inner element.
- these parts are respectively formed on the abutting front ends such that the largest cross-sectional area of the smaller part is completely within the smallest cross-sectional area of the larger part is located. In this way, it is ensured that the smaller part does not protrude beyond the outer circumference of the adjacent larger part at any point.
- these parts are formed on the abutting end faces such that the maximum radius at the end side of the part located in the second section is smaller than the minimum radius at the front side of the part located in the first section is.
- a spacer element between e.g. two adjacent parts of the inner element, e.g. arranged a spacer, which keeps the two parts spaced apart in the direction of the longitudinal axis. This ensures that a part of the inner element of a first section does not collide or come into contact with a part of the outer element in a second section. This means that it is ensured that a part of the inner element always only comes into contact exclusively with the associated part of the outer element. This is particularly important when the inner and outer elements are movable in the axial direction to each other.
- the inner element is integrally formed over at least two sections, preferably over all sections. That is, the parts of the inner element, which are located in these two sections of the pump, are integrally formed, for example, metal or ceramic. This simplifies the production because no assembly and alignment of several items to form the inner member are required.
- FIG. 2a shows in a side view and FIG. 2b in a perspective view of an inner element of a Moineau pump according to the invention.
- the pump is divided into four sections, which are arranged one behind the other in the axial direction, ie in the longitudinal direction or conveying direction of the pump. This is in FIG. 3 shown.
- the inner element 4 is correspondingly divided into four parts 4a, 4b, 4c, and 4d, the part 4a in the section 2a, the part 4b in the section 2b, the part 4c in the section 2c, and the part 4d in the section 2d of the pump is arranged.
- the shape of the inner element according to Figures 2 and 3 arises starting from an inner element, as in FIGS. 1a and 1b is shown. It is in FIGS. 1a and 1b the inner element 4 with its four in the axial direction X 1 successively lined-up parts 4a to 4d formed without rotation between these parts. In this state, the outer periphery of the inner member 4 has a continuous helical structure.
- the one or more screw threads 6 extend as a continuous helical shape over the entire axial length X 1 of the inner element 4, that is continuously over the four parts 4a to 4b.
- the inner element 4 has a conical shape, ie, tapering from the axial end on the part 4b to the opposite axial end at the end of the part 4a.
- the parts 4a to 4d are formed, or arranged to each other, that they are each rotated relative to each other about the longitudinal axis X 1 of the inner member 4 to each other. It is based on the state according to FIG. 1 the part 4c relative to the part 4d, the part 4b relative to the part 4c and the part 4c relative to the part 4b each rotated by the same angle in the same direction of rotation about the longitudinal axis X 1 .
- the parts 4d are each rotated by 90 ° to the adjacent parts, ie, the portion 4c is 90 ° about the longitudinal axis X 1 twisted relative to part 4d.
- the part 4b is rotated by 90 ° relative to the part 4c and corresponding to the part 4a by 90 ° relative to the part 4b.
- the parts 4a to 4d need not be manufactured as individual parts and assembled, but rather the entire element 4, as in FIG. 2 is shown, also be made in one piece directly in the form shown there. At the in FIG.
- the adjacent end faces of the parts 4a to 4d each have the same diameter. That is, for example, the diameter 22 of the part 4d on its side facing the part 4c is equal to the diameter 20 of the part 4c on its side facing the part 4d.
- the outer element 8 is subdivided into four parts 8a, 8b, 8c and 8d, the part 8a in the section 2a, the part 8b in the section 2b, part 8c is located in section 2c and part 8b is located in section 2d of the pump. That is, in the part 8a of the outer member 8, the part 4a of the inner member 4 rotates. Accordingly, in the part 8b, the part 4b and so forth rotate.
- the outer element 8 is annular in a known manner and has in its interior a recess 10 into which the inner element 4 is inserted.
- the recess 10 is correspondingly formed conically with the inner element 4 and has on its inner circumference a helical structure with screw 12 on.
- a helix is provided more than on the outer circumference of the outer element 4, ie in the case that the inner element 4 has two screw threads, the outer element 8 has on its inner circumference three screw threads.
- the arrangement of the parts 8a to 8d of the outer member 8 is also formed from an outer member 8 with continuous threads from one axial end to the opposite axial end of the outer member 8.
- the parts 8a to 8d are each rotated about the longitudinal axis X 2 of the outer element 8 to each other.
- the longitudinal axis X 2 of the outer element is inclined, ie at an angle to the longitudinal axis X 1 of the inner element. Both axes X 1 , X 2 intersect in a known manner in one point.
- the part 8c of the outer element 8 is also opposite the part 8d by a certain angle about the longitudinal axis X 2 and corresponding part 8b relative to the part 8c by the same angle about the longitudinal axis X 2 and the part 8a relative to the part 8b also the same angle about the longitudinal axis X 2 arranged rotated or formed.
- the direction of rotation of the rotation between the individual parts is the same.
- the parts 8a to 8d of the outer element 8 can be manufactured as individual parts, which are then twisted together accordingly. Alternatively, it is also possible to form the parts in one piece directly in the twisted arrangement.
- FIG. 4 schematically shows an inner element 4 consisting of four parts 4a, 4b, 4c and 4d, wherein in this arrangement different embodiments are combined with each other for explanation only.
- the parts 4a, 4b, 4c and 4d in the direction of the longitudinal axis X 1 have different heights 14, 16 have. It should be understood that this is not limited to only parts 4a and 4d. Also, the parts 4d and / or 4c may have different heights.
- the part 4c has, at its axial end facing the part 4d, a diameter 20 which is smaller in each direction than the diameter 22 at the axial end of the part 4d facing the part 4c.
- the part 4c in the radial direction does not protrude beyond the outer periphery of the part 4d at its front end facing the part 4c.
- the radial distance 24, 26 between the outer periphery of the part 4c at the end face thereof having the larger cross-sectional area and the outer periphery of the part 4d at the end face thereof having the smaller cross-sectional area is over the whole Scope greater than or equal to 0, but not less than 0. It is understood that the transition between the parts 4c and 4b and / or the part 4d and the part 4a can be designed accordingly. These embodiments ensure that the parts of the inner element 4 at the interfaces between the individual parts do not undesirably collide with the wrong, ie non-associated, parts of the outer element 8.
- the inner part 4 c does not come into contact with the part 8 d of the outer element 8 and correspondingly the part 4 d of the inner element 4 can not come into contact with the part 8 c of the outer element 8.
- FIG. 5 shows first the axial force which acts between the inner member 4 and the outer member 8, when the parts 4a to 4d and correspondingly the parts 8a to 8d are not rotated against each other, ie the pump according to an embodiment FIG. 1 having.
- the axial force is plotted over the angle of rotation ⁇ .
- individual curves 28a to 28d are shown which correspond to the forces acting on the individual parts 4a, 4b, 4c and 4d of the inner element 4.
- the curve 30 shows the total force which acts on the inner element 4 or between inner 4 and outer 8 element. It can be seen that in the sawtooth course of the Force curves 28a to 28d the peaks, ie the maximum forces occurring all at the same angle, here at about 180 ° occur. This leads to a high total force 30 occurring at this angle.
- FIG. 6 now shows a corresponding diagram for the arrangement according to FIG. 3 in which the parts 4a to 4d of the inner element and correspondingly the parts 8a to 8d of the outer element 8 are twisted against each other in the manner described above. It can be seen that, as a result, the courses 28a to 28d of the axial forces acting on the individual parts 4a to 4d are also shifted relative to each other by corresponding angles. This means that the force peaks or maximum forces which act on the individual parts of the inner element 4, no longer occur all at the same angle of rotation ⁇ , but offset by corresponding angle.
- Said axial forces are those axial forces which act through the fluid pressure in the interior of the pump between the inner element 4 and the outer element 8. That is, corresponding external forces must be applied to hold the inner member 4 against the outer member 8. By reducing the force peaks and reducing the total force, this pressure force can be reduced, thereby reducing friction and wear inside the pump.
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Abstract
Description
Die Erfindung betrifft eine Moineau-Pumpe bzw. eine Exzenterschneckenpumpe oder Exzenterschnecken-Kompressor. Derartige Moineau-oder Exzenterschneckenpumpen sind z. B. aus
Ein grundsätzliches Problem bei konisch ausgebildeten Moineau-Pumpen sind die pulsierend auftretenden Axialkräfte. Hier können insbesondere bei Pumpen für große Förderhöhen hohe Spitzenkräfte auftreten, welche es erforderlich machen, das innere und das äußere Element der Pumpe mit entsprechend großen Axialkräften zusammenzudrücken. Hierdurch erhöht sich zum einen der Verschleiß zum anderen aber auch das Startmoment zum Antrieb der Pumpe aufgrund der höheren Reibung.A fundamental problem with conical Moineau pumps are the pulsating axial forces. Here, in particular for pumps for large delivery heights, high peak forces occur, which make it necessary to compress the inner and outer elements of the pump with correspondingly large axial forces. This increases on the one hand the wear on the other hand, but also the starting torque for driving the pump due to the higher friction.
Es ist Aufgabe der Erfindung, eine verbesserte Moineau-Pumpe oder einen verbesserten Moineau-Kompressor bereitzustellen, bei welcher die auftretenden Axialkräfte verringert und entsprechend Reibung und Verschleiß der Pumpe vermindert werden können. Diese Aufgabe wird durch eine Moineau-Pumpe mit den im Anspruch 1 angegebenen Merkmalen gelöst. Bevorzugte Ausführungsformen ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung sowie den beigefügten Figuren.It is an object of the invention to provide an improved Moineau pump or an improved Moineau compressor, in which the axial forces occurring and correspondingly reduces friction and Wear of the pump can be reduced. This object is achieved by a Moineau pump having the features specified in claim 1. Preferred embodiments will become apparent from the subclaims, the following description and the accompanying figures.
Die erfindungsgemäße Moineau-Pumpe bzw. der Moineau-Kompressor weist ein konisch ausgebildetes inneres und ein konisch ausgebildetes äußeres Element auf. Dabei weist das innere Element eine zentrale konische Ausnehmung auf. Das äußere Element ist dabei in bekannter Weise ringförmig ausgebildet und weist an seinem Innenumfang eine schrauben- bzw. wendelförmige Struktur auf. Das innere Element ist korrespondierend an seinem Außenumfang wendel- bzw. schraubenförmig ausgebildet, wobei die schraubenförmige Struktur des äußeren Elementes einen Zahn bzw. Gewindegang mehr aufweist als die Struktur am Außenumfang des inneren Elementes. Das innere und das äußere Element sind so zueinander angeordnet, dass ihre jeweiligen Längsachsen im Winkel zueinander verlaufen und sich in einem Punkt schneiden.The Moineau pump according to the invention or the Moineau compressor has a conically formed inner and a conically formed outer element. In this case, the inner element has a central conical recess. The outer element is annular in a known manner and has on its inner circumference a helical or helical structure. The inner element is correspondingly formed helically on its outer circumference, wherein the helical structure of the outer element has a tooth or thread more than the structure on the outer circumference of the inner element. The inner and outer members are arranged relative to one another such that their respective longitudinal axes are at an angle to each other and intersect at a point.
Erfindungsgemäß ist die Pumpe in axialer Richtung, d. h. in der Förderrichtung in zumindest zwei Abschnitte geteilt. Dabei weist jeder Abschnitt einen Teil des äußeren Elementes und einen Teil des inneren Elementes auf. Die Teile des inneren Elementes und die Teile des äußeren Elementes sind in den zumindest zwei Abschnitten gegeneinander verdreht angeordnet. Das heißt, der in dem zweiten Abschnitt gelegene Teil des inneren Elementes ist gegenüber dem in dem ersten Abschnitt gelegenen Teil des inneren Elementes um die Längsachse des inneren Elementes um einen bestimmten Winkelbetrag verdreht. Entsprechend ist der in dem zweiten Abschnitt gelegene Teil des äußeren Elementes gegenüber dem in dem ersten Abschnitt gelegene Teil des äußeren Elementes um die Längsachse des äußeren Elementes um einen bestimmten Winkelbetrag verdreht.According to the invention, the pump is divided in the axial direction, ie in the conveying direction into at least two sections. In this case, each section has a part of the outer element and a part of the inner element. The parts of the inner element and the parts of the outer element are arranged rotated in the at least two sections against each other. That is, the portion of the inner member located in the second portion is twisted about the longitudinal axis of the inner member by a predetermined angle from the portion of the inner member located in the first portion. Correspondingly, the part of the outer element located in the second section is rotated by a certain angle relative to the part of the outer element located in the first section about the longitudinal axis of the outer element.
Durch die in Drehrichtung versetzte bzw. verdrehte Anordnung der mehreren Abschnitte bzw. Stufen der Moineau-Pumpe wird erreicht, dass in den Abschnitten die Axialkraft-Spitzen nicht an derselben Winkelstellung einer Antriebswelle bzw. des inneren und äußeren Elementes zueinander auftreten, vielmehr treten die Axialkraftspitzen in beiden Abschnitten bei unterschiedlichen Drehwinkeln auf. Auf diese Weise wird die maximal auftretende Axialkraft verringert, da sich die Axialkraftspitzen nicht an derselben Winkelposition addieren. Vielmehr ist der Verlauf der Axialkraft über den Drehwinkel der Antriebswelle bei verdrehter Anordnung der Abschnitte zueinander so, dass eine größere Zahl von Axialkraftspitzen, jedoch mit geringerer Amplitude auftritt. Insgesamt wird somit ein geglätteter Axialkraftverlauf über den Drehwinkel erreicht. Hierdurch wird die Gesamtbelastung des Pumpenantriebs reduziert.The offset in the rotational direction or twisted arrangement of the several sections or stages of the Moineau pump is achieved in that the axial force peaks do not occur at the same angular position of a drive shaft and the inner and outer element to each other, but rather occur the Axialkraftspitzen in both sections at different angles of rotation. In this way, the maximum occurring axial force is reduced because the axial force peaks do not add to the same angular position. Rather, the course of the axial force over the rotation angle of the drive shaft with twisted arrangement of the sections to each other so that a larger number of Axialkraftspitzen, but with lower amplitude occurs. Overall, a smoothed Axialkraftverlauf is thus achieved over the rotation angle. This reduces the overall load on the pump drive.
Darüber hinaus wird dadurch, dass die maximal auftretende Axialkraft auch nur eine geringere axiale Andruckkraft benötigt, um die äußeren und inneren Elemente in Anlage zu halten. Dadurch verringert sich wiederum die Reibung zwischen innerem und äußerem Element, wodurch zum einen der Verschleiß und zum anderen auch das erforderliche Startmoment verringert wird. Hierdurch kann insgesamt der Wirkungsgrad verbessert werden.In addition, it is characterized by the fact that the maximum occurring axial force also requires only a smaller axial pressure force to hold the outer and inner elements in abutment. This in turn reduces the friction between the inner and outer elements, which reduces wear and also reduces the required starting torque. As a result, the overall efficiency can be improved.
Bevorzugt weist die Pumpe mehr als zwei Abschnitte bzw. Stufen auf, wobei dann jeweils in zwei aneinander angrenzenden Abschnitten der in einem zweiten Abschnitt gelegene Teil des inneren Elementes gegenüber dem in einem ersten Abschnitt gelegenen Teil des inneren Elementes um die Längsachse des inneren Elementes verdreht angeordnet ist. Entsprechend ist der in dem zweiten Abschnitt gelegene Teil des äußeren Elementes gegenüber dem in dem ersten Abschnitt gelegene Teil des äußeren Elementes um die Längsachse des äußeren Elementes verdreht angeordnet. Bevorzugt sind somit bei mehreren Abschnitten bzw. Stufen alle jeweils aneinander grenzenden Abschnitte so ausgebildet, dass diese einen ersten und einen zweiten Abschnitt bilden, in dem äußeres und inneres Element wie beschrieben zueinander verdreht angeordnet sind. Das heißt, bei einer Pumpe mit vier Abschnitten sind das äußere und innere Element in dem zweiten Abschnitt gegenüber dem innerem und äußerem Element in dem ersten Abschnitt und dann wiederum in dem dritten Abschnitt das äußere und innere Element gegenüber dem äußeren und inneren Element in dem zweiten Abschnitt verdreht. Entsprechend ist dann in dem vierten Abschnitt wiederum das äußere und innere Element gegenüber dem äußeren und inneren Element in dem dritten Abschnitt verdreht. Im Fall von noch mehr Abschnitten setzt sich dies entsprechend fort. Dabei erfolgt die Verdrehung von Abschnitt zu Abschnitt vorzugsweise in derselben Drehrichtung, sodass insgesamt alle Abschnitte zueinander verdreht sind und keine zwei Abschnitte vorhanden sind, in denen die äußere bzw. inneren Elemente in derselben Winkelausrichtung bezüglich ihrer Längsachse angeordnet sind. Das bedeutet, dass der Winkel, um den die Teile zueinander verdreht werden abhängig von der Zahl der Abschnitte sein kann, so dass zwischen erstem und letztem Abschnitt die Verdrehung der Teile kleiner als 360° ist.Preferably, the pump has more than two sections or steps, wherein in each case in two adjoining sections, the part of the inner element located in a second section is arranged rotated relative to the part of the inner element situated in a first section about the longitudinal axis of the inner element is. Accordingly, the portion of the outer member located in the second portion is opposite the portion of the outer member located in the first portion about the longitudinal axis of the outer member arranged twisted. Thus, in the case of a plurality of sections or steps, in each case, in each case, all adjacent sections are preferably formed such that they form a first and a second section, in which the outer and inner elements are arranged rotated relative to one another as described. That is, in a four-section pump, the outer and inner members in the second portion opposite the inner and outer members in the first portion and then again in the third portion are the outer and inner members opposite the outer and inner members in the second Section twisted. Accordingly, in turn, in the fourth section, the outer and inner elements are then rotated relative to the outer and inner elements in the third section. In the case of even more sections, this continues accordingly. In this case, the rotation from section to section preferably takes place in the same direction of rotation, so that overall all sections are rotated relative to one another and there are no two sections in which the outer or inner elements are arranged in the same angular orientation with respect to their longitudinal axis. This means that the angle by which the parts are rotated relative to each other can be dependent on the number of sections, so that between the first and last section the rotation of the parts is less than 360 °.
Weiter bevorzugt sind die Teile des inneren Elementes um einen anderen Winkelbetrag zueinander verdreht als die Teile des äußeren Elementes. Aufgrund der unterschiedlichen Anzahl von, Gewindegängen an innerem und äußerem Element kann hierdurch ein besonders gleichmäßiger Lauf der Pumpe erreicht werden.More preferably, the parts of the inner element are rotated by a different angle to each other than the parts of the outer element. Due to the different number of threads on the inner and outer element, a particularly uniform running of the pump can be achieved.
Bevorzugt weist die schraubenförmige Kontur am Außenumfang des inneren Elementes in allen Abschnitten der Pumpe dieselbe Steigung auf. Entsprechend ist es bevorzugt, dass die schraubenförmige Kontur am Innenumfang des äußeren Elementes in allen Abschnitten der Pumpe dieselbe Steigung aufweist. Das heißt, die Steigung des Gewindes von innerem und äußerem Element ist jeweils über die gessamte Pumpe konstant. Weiter bevorzugt ist die Anzahl der Umdrehungen der Gewindegänge in jedem Abschnitt gleich.Preferably, the helical contour on the outer circumference of the inner element in all sections of the pump on the same slope. Accordingly, it is preferred that the helical contour on the inner circumference of the outer element in all sections of the Pump has the same slope. That is, the pitch of the thread of the inner and outer members is constant over the entire pump. More preferably, the number of revolutions of the threads in each section is the same.
Zweckmäßigerweise ist der in dem zweiten Abschnitt gelegene Teil des inneren Elementes relativ zu dem in dem ersten Abschnitt gelegenen Teil des inneren Elementes um einen Winkel
Vorzugsweise sind bei zwei aneinander angrenzenden Teilen des inneren Elementes diese Teile an den aneinander angrenzenden Stirnenden jeweils derart ausgebildet, dass die größte Querschnittsfläche des kleineren Teils vollständig innerhalb der kleinsten Querschnittsfläche des größeren Teils gelegen ist. Auf diese Weise wird sichergestellt, dass der kleinere Teil an keiner Stelle über den Außenumfang des angrenzenden größeren Teils auskragt.Preferably, in the case of two adjoining parts of the inner element, these parts are respectively formed on the abutting front ends such that the largest cross-sectional area of the smaller part is completely within the smallest cross-sectional area of the larger part is located. In this way, it is ensured that the smaller part does not protrude beyond the outer circumference of the adjacent larger part at any point.
Weiter bevorzugt sind bei zwei aneinander angrenzenden Teilen des inneren Elementes diese Teile an den aneinander angrenzenden Stirnseiten derart ausgebildet, dass der maximale Radius an der Stirnseite des in dem zweiten Abschnitt gelegenen Teils kleiner als der minimale Radius an der Stirnseite des in dem ersten Abschnitt gelegenen Teils ist. Durch diese Ausgestaltung wird sichergestellt, dass, egal um welchen Winkel die beiden Teile bezüglich ihrer Längsachse gegeneinander verdreht werden, die Stirnseite des in dem ersten Abschnitt gelegenen Teils sich nicht über den Umfang der angrenzenden Stirnseite des in dem zweiten Abschnitt gelegenen Teils hinaus erstreckt. So wird es möglich, die beiden Teile um beliebige Winkel gegeneinander zu verdrehen.More preferably, in the case of two adjoining parts of the inner element, these parts are formed on the abutting end faces such that the maximum radius at the end side of the part located in the second section is smaller than the minimum radius at the front side of the part located in the first section is. This embodiment ensures that, no matter by which angle the two parts are rotated relative to one another with respect to their longitudinal axis, the end face of the part located in the first section does not extend beyond the circumference of the adjacent end face of the part located in the second section. This makes it possible to rotate the two parts against each other at any angle.
Gemäß einer weiteren bevorzugten Ausführungsform der Erfindung ist zwischen zwei einander angrenzenden Teilen des inneren Elementes ein Distanzelement, z.B. eine Distanzscheibe angeordnet, welche die beiden Teile in Richtung der Längsachse voneinander beabstandet hält. Dadurch wird sichergestellt, dass ein Teil des inneren Elementes eines ersten Abschnittes nicht mit einem Teil des äußeren Elementes in einem zweiten Abschnitt kollidiert, bzw. in Kontakt kommt. Das bedeutet, es wird sichergestellt, dass ein Teil des inneren Elementes immer nur ausschließlich mit dem zugehörigen Teil des äußeren Elementes in Kontakt kommt. Dies ist insbesondere dann wichtig, wenn inneres und äußeres Element in axialer Richtung zueinander bewegbar sind.According to a further preferred embodiment of the invention, a spacer element between e.g. two adjacent parts of the inner element, e.g. arranged a spacer, which keeps the two parts spaced apart in the direction of the longitudinal axis. This ensures that a part of the inner element of a first section does not collide or come into contact with a part of the outer element in a second section. This means that it is ensured that a part of the inner element always only comes into contact exclusively with the associated part of the outer element. This is particularly important when the inner and outer elements are movable in the axial direction to each other.
Gemäß einer besonders bevorzugten Ausführungsform ist das innere Element über zumindest zwei Abschnitte, vorzugsweise über alle Abschnitte einstückig ausgebildet. Das heißt, die Teile des inneren Elementes, welche in diesen beiden Abschnitten der Pumpe gelegen sind, sind einstückig, beispielsweise aus Metall oder Keramik geformt. Dies vereinfacht die Herstellung, da keine Montage und Ausrichtung mehrerer Einzelteile zur Ausbildung des inneren Elementes erforderlich sind.According to a particularly preferred embodiment, the inner element is integrally formed over at least two sections, preferably over all sections. That is, the parts of the inner element, which are located in these two sections of the pump, are integrally formed, for example, metal or ceramic. This simplifies the production because no assembly and alignment of several items to form the inner member are required.
Nachfolgend wird die Erfindung beispielhaft anhand der beigefügten Figuren beschrieben. In diesen zeigt:
- Fig. 1a
- eine Seitenansicht und
- Fig. 1 b
- eine perspektivische Ansicht eines inneren Elementes mit vier Abschnitten, welche nicht gegeneinander verdreht sind,
- Fig. 2a
- eine Seitenansicht sowie
- Fig. 2b
- eine perspektivische Ansicht eines inneren Elementes mit vier Abschnitten, welche erfindungsgemäß gegeneinan-der verdreht sind,
- Fig. 3
- eine schematische Schnittansicht eines inneren Elementes gemäß
Figur 2 eingesetzt in ein äußeres Element, - Fig. 4
- eine schematische Seitenansicht eines inneren Elementes gemäß der Erfindung,
- Fig. 5
- den Axialkraftverlauf für das innere Element gemäß
Figur 1 - Fig. 6
- den Axialkraftverlauf einer erfindungsgemäßen Pumpe.
- Fig. 1a
- a side view and
- Fig. 1 b
- a perspective view of an inner element with four sections, which are not rotated against each other,
- Fig. 2a
- a side view as well
- Fig. 2b
- 4 is a perspective view of an inner element with four sections, which according to the invention are twisted against each other.
- Fig. 3
- a schematic sectional view of an inner element according to
FIG. 2 inserted in an outer element, - Fig. 4
- a schematic side view of an inner element according to the invention,
- Fig. 5
- the Axialkraftverlauf for the inner element according to
FIG. 1 - Fig. 6
- the Axialkraftverlauf a pump according to the invention.
Das innere Element 4 ist entsprechend in vier Teile 4a, 4b, 4c, und 4d geteilt, wobei der Teil 4a in dem Abschnitt 2a, der Teil 4b in dem Abschnitt 2b, der Teil 4c in dem Abschnitt 2c und der Teil 4d in dem Abschnitt 2d der Pumpe angeordnet ist. Die Form des inneren Elementes gemäß
Ausgehend von dieser in
wobei m die Anzahl der Gewindegänge bzw. Zähne ist. Das heißt, im Fall, dass das innere Element 4 an seinem Außenumfang einen Gewindegang aufweist würden die Teile 4a, 4b, 4c, 4d jeweils um 90 ° zu den angrenzenden Teilen verdreht, d. h. der Teil 4c ist um 90 ° um die Längsachse X1 relativ zu dem Teil 4d verdreht. Der Teil 4b, ist wiederum um 90 ° relativ zu dem Teil 4c verdreht und entsprechend der Teil 4a um 90 ° relativ zu dem Teil 4b. So ergibt sich die Form des inneren Elementes 4, welche in
where m is the number of threads or teeth. That is, in the case that the
Entsprechend der Teilung des inneren Elementes 4 gemäß den Abschnitten 2a bis 2d der Pumpe ist auch das äußere Element 8 in vier Teile 8a, 8b, 8c und 8d untergliedert, wobei der Teil 8a in dem Abschnitt 2a, der Teil 8b in dem Abschnitt 2b, der Teil 8c in dem Abschnitt 2c und der Teil 8b in dem Abschnitt 2d der Pumpe gelegen ist. Das bedeutet, in dem Teil 8a des äußeren Elementes 8 rotiert der Teil 4a des inneren Elementes 4. Entsprechend rotiert in dem Teil 8b der Teil 4b und so weiter.According to the division of the
Das äußere Element 8 ist in bekannter Weise ringförmig ausgebildet und weist in seinem Inneren eine Ausnehmung 10 auf, in welche das innere Element 4 eingesetzt ist. Die Ausnehmung 10 ist entsprechend konisch zu dem inneren Element 4 geformt und weist an ihrem Innenumfang eine schraubenförmige Struktur mit Schraubengängen 12 auf. Dabei ist am Innenumfang der Ausnehmung 10 ein Schraubengang mehr als am Außenumfang des äußeren Elementes 4 vorgesehen, d. h. in dem Fall, dass das innere Element 4 zwei Schraubengänge aufweist, weist das äußere Element 8 an seinem Innenumfang drei Schraubengänge auf.The outer element 8 is annular in a known manner and has in its interior a
Die Anordnung der Teile 8a bis 8d des äußeren Elementes 8 ist ebenfalls ausgehend von einem äußeren Element 8 mit durchgehenden Gewindegängen von einem Axialende zum entgegengesetzten Axialende des äußeren Elementes 8 gebildet. Dabei sind die Teile 8a bis 8d jeweils um die Längsachse X2 des äußeren Elementes 8 zueinander verdreht. Die Längsachse X2 des äußeren Elementes verläuft geneigt, d. h. im Winkel zu der Längsachse X1 des inneren Elementes. Beide Achsen X1, X2 schneiden sich in bekannter Weise in einem Punkt.The arrangement of the
Der Teil 8c des äußeren Elementes 8 ist gegenüber dem Teil 8d um einen bestimmten Winkel um die Längsachse X2 und entsprechend der Teil 8b relativ zu dem Teil 8c um denselben Winkel um die Längsachse X2 sowie der Teil 8a relativ zu dem Teil 8b ebenfalls um denselben Winkel um die Längsachse X2 verdreht angeordnet bzw. ausgebildet. Dabei ist die Drehrichtung der Verdrehung zwischen den einzelnen Teilen jeweils gleich. Der Winkel, um welchen jeweils zwei aneinander angrenzenden Teile des äußeren Elementes 8 jeweils zueinander verdreht sind, beträgt
wobei m die Zahl der Schraubengänge bzw. Zähne des inneren Elementes ist. Das heißt, ausgehend von dem Beispiel, dass das innere Element 4 einen Schraubengang aufweist, wäre bei der hier gezeigten Pumpe mit vier Abschnitten der Verdrehwinkel zwischen den einander angrenzenden Teile des äußeren Elementes 8 jeweils 45 °.The
where m is the number of screw threads or teeth of the inner element. That is, starting from the example that the
Wie auch die Teile des inneren Elementes 4 können die Teile 8a bis 8d des äußeren Elementes 8 als Einzelteile gefertigt werden, welche dann entsprechend verdreht zueinander zusammengesetzt werden. Alternativ ist es auch möglich, die Teile einstückig direkt in der verdrehten Anordnung auszubilden.As well as the parts of the
Zwischen den Teilen 4b und 4c ist beispielsweise die Anordnung einer zylindrischen Distanzscheibe 18 gezeigt. Eine solche könnte auch zwischen den Abschnitten 4a und 4b sowie den Teilen 4c und 4d angeordnet werden.Between the
Ferner ist in dieser Figur zwischen den Teilen 4c und 4d eine weitere bevorzugte Ausgestaltung schematisch dargestellt. Und zwar weist der Teil 4c an seinem dem Teil 4d zugewandten Axialende einen Durchmesser 20 auf, welcher in jeder Richtung kleiner als der Durchmesser 22 an dem dem Teil 4c zugewandten Axialende des Teils 4d ist. Auf diese Weise wird sichergestellt, dass, egal um welchen Winkel der Teil 4c gegenüber dem Teil 4d um die Längsachse X1 verdreht wird, der Teil 4c in radialer Richtung nicht über den Außenumfang des Teils 4d an dessen dem Teil 4c zugewandten Stirnende auskragt. Das heißt, der radiale Abstand 24, 26 zwischen dem Außenumfang des Teils 4c an dessen Stirnseite mit der größeren Querschnittsfläche und dem Außenumfang des Teils 4d an dessen Stirnfläche mit der kleineren Querschnittsfläche ist über den gesamten Umfang größer oder gleich 0, jedoch nicht kleiner als 0. Es ist zu verstehen, dass auch der Übergang zwischen den Teilen 4c und 4b und/oder dem Teil 4d und dem Teil 4a entsprechend ausgestaltet werden kann. Durch diese Ausgestaltungen wird sichergestellt, dass die Teile des inneren Elementes 4 an den Schnittstellen zwischen den einzelnen Teilen nicht in unerwünschter Weise mit den falschen, d. h. nicht zugehörigen Teilen des äußeren Elementes 8 kollidieren. Beispielsweise wird sichergestellt, dass das innere Teil 4c nicht mit dem Teil 8d des äußeren Elementes 8 in Kontakt kommt und entsprechend der Teil 4d des inneren Elementes 4 nicht mit dem Teil 8c des äußeren Elementes 8 in Kontakt kommen kann. Dies ist insbesondere deshalb wichtig, da das innere Element 4 in axialer Richtung X1 in dem äußeren Element 8 um ein gewisses Spiel bewegbar sein kann, um die Andruckkraft zwischen innerem Element und äußerem Element 8 zu variieren.Furthermore, a further preferred embodiment is shown schematically in this figure between the
Durch die erfindungsgemäße Ausgestaltung mit den zueinander verdrehten Abschnitten 2a bis 2d der der Pumpe bzw. Teilen 4a bis 4d des inneren Elementes 4 und Teilen 8a bis 8d der äußeren Elementes 8 wird ein optimierter Verlauf der Axialkraft über die Umdrehung zwischen innerem Element 4 und äußerem Element 8 erreicht. Dies wird anhand der
Die genannten Axialkräfte sind diejenigen Axialkräfte, welche durch den Fluiddruck im Inneren der Pumpe zwischen innerem Element 4 und äußerem Element 8 wirken. Das heißt, es müssen von außen entsprechende Kräfte aufgebracht werden, um das innere Element 4 an dem äußeren Element 8 in Anlage zu halten. Dadurch, dass die Kraftspitzen verringert werden und die Gesamtkraft verringert wird, kann diese Andruckkraft verringert werden, wodurch Reibung und Verschleiß im Inneren der Pumpe verringert werden.Said axial forces are those axial forces which act through the fluid pressure in the interior of the pump between the
Wenn vorangehend die Erfindung anhand einer vierstufigen Pumpe, das heißt einer Pumpe mit vier Abschnitten 2a bis 2d beschrieben wurde, so ist jedoch zu verstehen, dass die Erfindung auch mit anderen Anzahlen von Abschnitten bzw. Stufen, beispielsweise weniger oder mehr als vier Stufen realisiert werden kann.However, if the invention has been described above with reference to a four-stage pump, that is to say a pump with four sections 2a to 2d, then it should be understood that the invention also has other numbers can be realized by sections, for example less or more than four stages.
- 2a bis 2d2a to 2d
- - Abschnitte der Pumpe- sections of the pump
- 44
- - inneres Element- inner element
- 4a bis 4d4a to 4d
- - Teile des inneren Elementes- Parts of the inner element
- 66
- - Schraubengänge- screw threads
- 88th
- - äußeres Element- outer element
- 8a bis 8d8a to 8d
- - Teile des äußeren Elementes- Parts of the outer element
- 1010
- - Ausnehmung- recess
- 1212
- - Schraubengänge- screw threads
- 14, 1614, 16
- - Höhen- heights
- 1818
- - Distanzscheibe- Spacer
- 20, 2220, 22
- - Durchmesser- diameter
- 24, 2624, 26
- - radialer Abstand- radial distance
- 28a bis 28d -28a to 28d -
- AxialkraftkurvenAxialkraftkurven
- 3030
- - Kurve der Gesamtaxialkraft- Curve of the total axial force
- X1 X 1
- - Längsachse des inneren Elementes- Longitudinal axis of the inner element
- X2 X 2
- - Längsachse des äußeren Elementes- Longitudinal axis of the outer element
- ωω
- - Drehwinkel- rotation angle
- αα
- - Winkel der Verdrehung zwischen aneinander angrenzenden Teilen des inneren und äußeren Elementes- Angle of rotation between adjacent parts of the inner and outer element
Claims (10)
dadurch gekennzeichnet, dass die Pumpe in axialer Richtung zumindest zwei Abschnitte (2a, 2b, 2c, 2d) aufweist, wobei der in dem zweiten Abschnitt (2b) gelegene Teil (4b) des inneren Elementes (4) gegenüber dem in dem ersten Abschnitt (2a) gelegenen Teil (4a) des inneren Elementes um die Längsachse (X1) des inneren Elementes (4) verdreht angeordnet ist und der in dem zweiten Abschnitt (2b) gelegene Teil (8b) des äußeren Elementes (8) gegenüber dem in dem ersten Abschnitt (2a) gelegenen Teil (8a) des äußeren Elementes (8) um die Längsachse (X2) des äußeren Elementes (8) verdreht angeordnet ist.Moineau pump or compressor with a conically shaped inner (4) and a conically shaped outer (8) element whose longitudinal axes (X 1 , X 2 ) are at an angle to each other and intersect at a point,
characterized in that the pump has at least two sections (2a, 2b, 2c, 2d) in the axial direction, the part (4b) of the inner element (4) located in the second section (2b) being opposite that in the first section (Fig. 2a) located portion (4a) of the inner element about the longitudinal axis (X 1 ) of the inner element (4) is arranged rotated and in the second portion (2b) located part (8b) of the outer element (8) relative to that in the first portion (2a) located portion (8a) of the outer element (8) about the longitudinal axis (X 2 ) of the outer element (8) is arranged rotated.
wobei n die Anzahl der Abschnitte (2a-2d) der Pumpe ist und m die Anzahl der Gewindegänge (6) des inneren Elementes ist.Moineau pump according to one of the preceding claims, characterized in that the portion (4b) of the inner element (4) located in the second portion (2b) is relative to the portion (4a) of the inner element located in the first portion (2a) (4) at an angle
where n is the number of sections (2a-2d) of the pump and m is the number of threads (6) of the inner element.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE502007001761T DE502007001761D1 (en) | 2007-11-02 | 2007-11-02 | Moineau pump |
EP07021379A EP2063125B1 (en) | 2007-11-02 | 2007-11-02 | Moineau pump |
AT07021379T ATE445782T1 (en) | 2007-11-02 | 2007-11-02 | MOINEAU PUMP |
CN2008801144084A CN101842595B (en) | 2007-11-02 | 2008-09-25 | Screw pump |
PCT/EP2008/008120 WO2009056200A1 (en) | 2007-11-02 | 2008-09-25 | Moineau pump |
US12/740,731 US8308459B2 (en) | 2007-11-02 | 2008-09-25 | Moineau pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07021379A EP2063125B1 (en) | 2007-11-02 | 2007-11-02 | Moineau pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2063125A1 true EP2063125A1 (en) | 2009-05-27 |
EP2063125B1 EP2063125B1 (en) | 2009-10-14 |
Family
ID=39262319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07021379A Active EP2063125B1 (en) | 2007-11-02 | 2007-11-02 | Moineau pump |
Country Status (6)
Country | Link |
---|---|
US (1) | US8308459B2 (en) |
EP (1) | EP2063125B1 (en) |
CN (1) | CN101842595B (en) |
AT (1) | ATE445782T1 (en) |
DE (1) | DE502007001761D1 (en) |
WO (1) | WO2009056200A1 (en) |
Cited By (3)
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EP2532833A1 (en) * | 2011-06-10 | 2012-12-12 | ViscoTec Pumpen-u. Dosiertechnik GmbH | Conveying element for an eccentric screw pump and eccentric screw pump |
FR3031786A1 (en) * | 2015-01-19 | 2016-07-22 | Hispano - Suiza | INTEGRATION OF A PUMP IN FUT OF PINION |
DE202018104142U1 (en) * | 2018-07-18 | 2019-10-22 | Vogelsang Gmbh & Co. Kg | Rotor for an eccentric screw pump |
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DE202009002823U1 (en) * | 2009-03-02 | 2009-07-30 | Daunheimer, Ralf | Cavity Pump |
US20130224053A1 (en) * | 2011-10-03 | 2013-08-29 | Jan Hendrik Ate Wiekamp | Coaxial progressive cavity pump |
CN102619747B (en) * | 2012-04-06 | 2014-11-05 | 北京工业大学 | High-pressure seawater hydraulic pump for double-cone opposite-cone threaded rod |
GB201502738D0 (en) | 2014-02-18 | 2015-04-01 | Vert Rotors Uk Ltd | Rotary Positive-displacement machine |
CN103883522B (en) * | 2014-03-17 | 2016-03-02 | 北京工业大学 | A kind of curved surface forming method of Conic thread rod-lining pair |
CN103862718B (en) * | 2014-04-02 | 2016-04-13 | 三能器具(无锡)有限公司 | The automatic bound edge corner wrapping device of loaf pan |
US10174973B2 (en) | 2015-08-27 | 2019-01-08 | Vert Rotors Uk Limited | Miniature low-vibration active cooling system with conical rotary compressor |
US9776739B2 (en) | 2015-08-27 | 2017-10-03 | Vert Rotors Uk Limited | Miniature low-vibration active cooling system with conical rotary compressor |
CN107131142B (en) * | 2017-07-07 | 2018-07-06 | 中国科学院工程热物理研究所 | The startup control device and method of centrifugal compressor |
US20220364559A1 (en) * | 2019-05-14 | 2022-11-17 | Schlumberger Technology Corporation | Mud motor or progressive cavity pump with varying pitch and taper |
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- 2007-11-02 DE DE502007001761T patent/DE502007001761D1/en active Active
- 2007-11-02 AT AT07021379T patent/ATE445782T1/en not_active IP Right Cessation
- 2007-11-02 EP EP07021379A patent/EP2063125B1/en active Active
-
2008
- 2008-09-25 CN CN2008801144084A patent/CN101842595B/en active Active
- 2008-09-25 WO PCT/EP2008/008120 patent/WO2009056200A1/en active Application Filing
- 2008-09-25 US US12/740,731 patent/US8308459B2/en active Active
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US1892217A (en) * | 1930-05-13 | 1932-12-27 | Moineau Rene Joseph Louis | Gear mechanism |
GB436843A (en) * | 1934-05-02 | 1935-10-18 | Rene Joseph Louis Moineau | Improvements in rotary pumps, compressors and motors |
EP0457925A1 (en) * | 1989-12-08 | 1991-11-27 | Permsky Filial Vsesojuznogo Nauchno-Issledovatelskogo Instituta Burovoi Tekhniki | Working organ of helical-type down-hole drive for hole drilling |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2532833A1 (en) * | 2011-06-10 | 2012-12-12 | ViscoTec Pumpen-u. Dosiertechnik GmbH | Conveying element for an eccentric screw pump and eccentric screw pump |
FR3031786A1 (en) * | 2015-01-19 | 2016-07-22 | Hispano - Suiza | INTEGRATION OF A PUMP IN FUT OF PINION |
WO2016116694A1 (en) * | 2015-01-19 | 2016-07-28 | Hispano - Suiza | Integration of a pump on a pinion shank |
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DE202018104142U1 (en) * | 2018-07-18 | 2019-10-22 | Vogelsang Gmbh & Co. Kg | Rotor for an eccentric screw pump |
US11841016B2 (en) | 2018-07-18 | 2023-12-12 | Vogelsang Gmbh & Co Kg | Rotor for an eccentric screw pump and method for the manufacture thereof |
Also Published As
Publication number | Publication date |
---|---|
WO2009056200A1 (en) | 2009-05-07 |
EP2063125B1 (en) | 2009-10-14 |
CN101842595A (en) | 2010-09-22 |
US8308459B2 (en) | 2012-11-13 |
ATE445782T1 (en) | 2009-10-15 |
US20100260636A1 (en) | 2010-10-14 |
DE502007001761D1 (en) | 2009-11-26 |
CN101842595B (en) | 2013-06-05 |
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