EP0380050A2 - Stator arrangement for eccentric spiral pumps - Google Patents

Stator arrangement for eccentric spiral pumps Download PDF

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Publication number
EP0380050A2
EP0380050A2 EP90101298A EP90101298A EP0380050A2 EP 0380050 A2 EP0380050 A2 EP 0380050A2 EP 90101298 A EP90101298 A EP 90101298A EP 90101298 A EP90101298 A EP 90101298A EP 0380050 A2 EP0380050 A2 EP 0380050A2
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EP
European Patent Office
Prior art keywords
stator
metal sleeve
arrangement according
flanges
circumferential surface
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.)
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EP90101298A
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German (de)
French (fr)
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EP0380050A3 (en
Inventor
Antal Nádor
jr. Dipl.-Ing. Nádor Antal
Akos Dipl.-Ing. Petrik
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HIDROMECHANIKA SZIVATTYU- ES ANYAGMOZGATOGEP- GYARTO KISSZOVETKEZET
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HIDROMECHANIKA SZIVATTYU- ES ANYAGMOZGATOGEP- GYARTO KISSZOVETKEZET
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Publication of EP0380050A2 publication Critical patent/EP0380050A2/en
Publication of EP0380050A3 publication Critical patent/EP0380050A3/en
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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
    • 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
    • F04C2/1075—Construction of the stationary member

Definitions

  • the invention relates to an arrangement which can be used in the case of the stator of eccentric spiral pumps, which is made of elastomeric material and has a threaded profile on its inner surface with two or more gates.
  • the stator of eccentric spiral pumps is produced in different types, corresponding to the expanding uses.
  • the goal is that an appropriate training can meet several requirements, which can be manufactured in a simple manner, with cheap means and therefore guarantees economical production and use accomplishes.
  • the previously known solutions have been worked out to achieve this objective, which is partly being successfully solved. These solutions can be divided into two main groups, namely there are stators made of elastomeric material releasably attached in a metal sleeve, and there are stators made of elastomeric material permanently attached in the metal sleeve. Both groups also include re-enactment variants.
  • the advantage of the solutions belonging to the first group is the cheap manufacture and operation, because the metal sleeve as a part of the pump is a permanent component, and only the stator made of elastomeric material is replaced after wear.
  • stator made of elastomeric material is generally mechanically fastened on one side / at one end / in the metal sleeve, which in part allows the stator to rotate and in part when the open side protrudes into the pressure chamber of the pump , and the liquid penetrates between the stator and the metal sleeve, separates them from each other and reduces or eliminates the frictional connection between the stator and the metal sleeve.
  • stator is made of elastomer Material is made with the metal sleeve forming a unit and after consumption the expensive complete unit is replaced.
  • the metal sleeve is not part of the pump, but part of the stator.
  • the aim of the invention is to develop such a stator for eccentric spiral pumps, which is not connected to the metal sleeve, and yet is completely secured against rotation, its adjustment is still stable, and in which the pumped medium from the pressure chamber does not flow under the outer surface can.
  • the invention is based on the finding that the polygon shape also secures well against rotation, and at the same time one during adjustment uniform deformation can be achieved, and finally the flanges formed at the end of the stator in a corresponding form can prevent not only the longitudinal movement but also the seepage of the medium being pumped.
  • the invention is thus an arrangement of the stator of eccentric spiral pumps, the material of which is elastomeric and the inner surface of which has a threaded profile with two or more gates, and which according to the invention can be characterized in that the outer circumferential surface of the stator is a polygon surface, and the stator of a metal sleeve is encased, the inner lateral surface of which adapts to the outer lateral surface of the stator, and is cut open with at least one longitudinal slit.
  • the polygonal surface of the outer sheath of the stator is formed by sheath pieces of the same center angle and the same arc, and the hitting edge of the adjacent sheath pieces or the passage area formed between them is located as a whole between the common meeting plane of two sheath pieces and the center line of the stator is.
  • both are At the ends of the stator, such a flange is formed, the diameter of which is larger than that of the enveloping circle of the lateral surface, and the length of the metal sleeve is the same with the distance between the two flanges.
  • the flanges have an annular sealing profile which protrudes from their end face.
  • one or more clamping rings are formed on the outer surface of the metal sleeve on both sides of the slit, in which tangential bores are.
  • the metal sleeve with two slits is divided into two half parts and clamping surfaces are formed next to both slits.
  • Fig. 1 the arrangement of the stator is shown in half-section half-view.
  • the stator 1 with a thick line, which indicates this surrounding metal sleeve 2 - as if it were transparent - with a thin line.
  • the inner surface B of the stator 1 made of elastomeric material is a threaded profile with two gates, and the outer surface P is a polygon surface.
  • the lateral surface P is formed by six jacket pieces bent in this way, the central angle ⁇ and radius r of which are the same.
  • the distance t between the edge e arising when the casing pieces meet and the center line is less than the distance T between the contact plane S common to two adjacent casing pieces and the center line. It can be seen that this polygon surface is to a certain extent different from the polygon surface common in technical life, where more or less curved convex sections alternate.
  • the stator 1 is encased by such a metal sleeve 2, the inner lateral surface of which completely adapts to the outer lateral surface P of the stator 1.
  • the metal sleeve 2 is divided into two half parts by means of two longitudinal slits 3 and 4.
  • a clamping ring 5 is formed, which extends along the entire length of the metal sleeve 2. Bores 6 are arranged tangentially in the clamping rings 5.
  • a flange 7 is formed at each of the two ends of the stator 1.
  • the diameter D of the flanges 7 is larger than the diameter d of the enveloping circle of the circumferential surface P.
  • An annular sealing profile 9 protrudes from the end face 8 of the flanges 7. This is similar to the half part of an "O" ring
  • the length l of the stator 1 between the flanges 7 and the length L of the metal sleeve are the same.
  • the arrangement according to the invention can be used as follows.
  • the stator 1 can then be installed in the eccentric spiral pump.
  • the sealing profile 9 located on the flanges 7, as indicated by its shape, will behave as an "O" ring which is used for sealing end faces.
  • This sealing profile 9 prevents the pumped medium from bypassing the flange 7 from the pressure side and thus getting between the stator 1 and the metal sleeve 2. It is evident that the length L of the metal sleeve 2 should therefore be the same as the length l of the stator 1 so that it can give the flanges 7 appropriate support.
  • the form chosen by us also has another task, namely when adjusting the stator 1.
  • the inner surface B of the stator 1 wears out heavily during operation. This was previously compensated for by the deformation of the stator 1, but this was not complete due to the uneven deformation and led to uneven wear.
  • the metal sleeve 2 can also be manufactured with a single, or even with more than two slits. This is primarily influenced by the material and the shape of the stator 1, and on the other hand by the arrangement in the pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The invention relates to an arrangement of the stator of eccentric spiral pumps whose material is an elastomer and whose inner face has a thread profile with two or more bevels. The external circumferential surface of the stator is a polygon surface and the stator is enclosed by a metal sleeve, the inner circumferential surface of which is adapted to the external circumferential surface of the stator and which is broken by at least one slit. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Anord­nung, die bei dem aus elastomerem Material gefertigten und an seiner Innenfläche über Gewindeprofil mit zwei oder mehreren Anschnitten verfügenden Stator von ex­zentrischen Spiralpumpen verwendet werden kann.The invention relates to an arrangement which can be used in the case of the stator of eccentric spiral pumps, which is made of elastomeric material and has a threaded profile on its inner surface with two or more gates.

Der Stator von exzentrischen Spiralpumpen wird in je mehrartigen, den sich erweitenden Verwendungs­zwecken entsprechenden Ausführungen erzeugt. Das Ziel ist, dass eine zweckmässige Ausbildung je mehreren An­sprüchen entsprechen kann, die auf einfache Weise, mit billigen Mitteln hergestellt werden kann und demzufolge eine wirtschaftliche Produktion und Verwendung gewähr­ leistet. Die bisher bekannten Lösungen sind zur Er­reichung dieser Zielsetzung ausgearbeitet worden, was teilweise mit Erfolg auch gelöst wird. Diese Lösungen können in zwei Hauptgruppen geteilt werden, und zwar es gibt Statoren aus elastomerem Material in einer Metallhülse lösbar befestigt, und es gibt Statoren aus elastomerem Material in der Metallhülse unlösbar be­festigt. Beide Gruppen beinhalten auch Nachstellung sichernde Variante.The stator of eccentric spiral pumps is produced in different types, corresponding to the expanding uses. The goal is that an appropriate training can meet several requirements, which can be manufactured in a simple manner, with cheap means and therefore guarantees economical production and use accomplishes. The previously known solutions have been worked out to achieve this objective, which is partly being successfully solved. These solutions can be divided into two main groups, namely there are stators made of elastomeric material releasably attached in a metal sleeve, and there are stators made of elastomeric material permanently attached in the metal sleeve. Both groups also include re-enactment variants.

Der Vorteil der zur ersten Gruppe gehören­den Lösungen ist die billige Herstellung und Betrieb, weil die Metallhülse als Teil der Pumpe ein dauerhaf­ter Bestandteil ist, und nur der Stator aus elastomerem Material nach dem Verschleiss ausgetauscht wird.The advantage of the solutions belonging to the first group is the cheap manufacture and operation, because the metal sleeve as a part of the pump is a permanent component, and only the stator made of elastomeric material is replaced after wear.

Der Nachteil dieser Lösungen besteht da­rin, dass der Stator aus elastomerem Material im all­gemeinen an einer Seite /an einem Ende/ mechanisch in der Metallhülse befestigt ist, was teilweise dem Stator eine Verdrehung zulässt, und teilweise wenn die offene Seite in den Druckraum der Pumpe hineinragt, und die Flüssigkeit zwischen den Stator und die Metallhülse ein­dringt, diese voneinander trennt und die auf Reibung ruhende Verbindung zwischen dem Stator und der Metall­hülse vermindert oder aufhebt.The disadvantage of these solutions is that the stator made of elastomeric material is generally mechanically fastened on one side / at one end / in the metal sleeve, which in part allows the stator to rotate and in part when the open side protrudes into the pressure chamber of the pump , and the liquid penetrates between the stator and the metal sleeve, separates them from each other and reduces or eliminates the frictional connection between the stator and the metal sleeve.

Die in die zweite Gruppe gehörenden Lösun­gen sind kostspieliger, weil der Stator aus elastomerem Material mit der Metallhülse eine Einheit bildend her­gestellt wird und nach dem Verbrauch die teuere komplette Einheit ausgetauscht wird. Die Metallhülse ist nicht Bau­teil der Pumpe, sondern Teil des Stators.The solutions belonging to the second group are more expensive because the stator is made of elastomer Material is made with the metal sleeve forming a unit and after consumption the expensive complete unit is replaced. The metal sleeve is not part of the pump, but part of the stator.

Diese Lösungen haben den Nachteil, dass die Elastomer-Metall-Bindung, die im allgemeinen eine mit Klebung kombinierte Vulkanisierungstechnologie ist, eine sehr strenge technologische Disziplin und gute Stoffgüte bedingt. Bei Mangel dieser Anforderungen wird die Elasto­mer-Metall-Bindung unsicher, was - da bei dieser Lösung keine kontrollierbare mechanische Bindung vorhanden ist - Abtrennungen, Taschenbildungen innerhalb der Metall­hülse verursachen kann, was zu schnellem Verbrauch führt, und der Verlust ist wegen des hohen Preises des Stators sehr gross.These solutions have the disadvantage that the elastomer-metal bond, which is generally a vulcanization technology combined with adhesive, requires a very strict technological discipline and good material quality. If these requirements are lacking, the elastomer-metal bond becomes unsafe, which - since this solution has no controllable mechanical bond - can cause separations, pocket formation within the metal sleeve, which leads to rapid consumption, and the loss is due to the high price of the Stator very large.

Zielsetzung der Erfindung ist, einen der­artigen Stator zu exzentrischen Spiralpumpen auszuar­beiten, der mit der Metallhülse nicht verbunden ist, und trotzdem gegen Verdrehung vollständig gesichert ist, weiterhin dessen Nachstellung formbeständig ist, und bei dem das geförderte Medium aus dem Druckraum nicht unter die äussere Mantelfläche einströmen kann.The aim of the invention is to develop such a stator for eccentric spiral pumps, which is not connected to the metal sleeve, and yet is completely secured against rotation, its adjustment is still stable, and in which the pumped medium from the pressure chamber does not flow under the outer surface can.

Der Erfindung liegt diejenige Erkenntnis zugrunde, dass die Polygonform auch gegen Verdrehung gut sichert, und zugleich bei der Nachstellung eine gleichmässige Deformation erreicht werden kann, und schliesslich die am Ende des Stators ausgebildeten Flansche in entsprechender Form nicht nur die längs­gerichtete Bewegung, sondern auch die Sickerung des geförderten Mediums verhindern können.The invention is based on the finding that the polygon shape also secures well against rotation, and at the same time one during adjustment uniform deformation can be achieved, and finally the flanges formed at the end of the stator in a corresponding form can prevent not only the longitudinal movement but also the seepage of the medium being pumped.

Die Erfindung ist also eine Anordnung des Stators von exzentrischen Spiralpumpen, dessen Ma­terial elastomer ist und dessen Innenfläche über Ge­windeprofil mit zwei oder mehreren Anschnitten verfügt, und die erfindungsgemäss dadurch gekennzeichnet werden kann, dass die äussere Mantelfläche des Stators eine Polygonfläche ist, und der Stator von einer Metallhülse umnommen ist, deren innere Mantelfläche sich an der äusseren Mantelfläche des Stators anpasst, und mit mindestens einer längsgerichteten Aufschlitzung auf­geschnitten ist.The invention is thus an arrangement of the stator of eccentric spiral pumps, the material of which is elastomeric and the inner surface of which has a threaded profile with two or more gates, and which according to the invention can be characterized in that the outer circumferential surface of the stator is a polygon surface, and the stator of a metal sleeve is encased, the inner lateral surface of which adapts to the outer lateral surface of the stator, and is cut open with at least one longitudinal slit.

Bei einer vorteilhaften Ausführungsform der erfindungsgemässen Anordnung ist die Polygonfläche des Aussenmantels des Stators durch Mantelstücke glei­chen Zentriwinkels und gleichen Bogens gebildet, und die Treffkante der benachbarten Mantelstücke oder die zwischen diesen ausgebildete Durchgangsfläche im Ganzen zwischen der gemeinsamen Treffebene von zwei Mantel­stücken und der Mittellinie des Stators befindlich ist.In an advantageous embodiment of the arrangement according to the invention, the polygonal surface of the outer sheath of the stator is formed by sheath pieces of the same center angle and the same arc, and the hitting edge of the adjacent sheath pieces or the passage area formed between them is located as a whole between the common meeting plane of two sheath pieces and the center line of the stator is.

Bei einer weiteren vorteilhaften Ausfüh­rungsform der erfindungsgemässen Anordnung ist an beiden Enden des Stators ein derartiger Flansch ausgebildet, dessen Durchmesser grösser als der des Umhüllkreises der Mantelfläche ist, und die Länge der Metallhülse mit dem Abstand zwischen den zwei Flanschen gleich ist.In a further advantageous embodiment of the arrangement according to the invention, both are At the ends of the stator, such a flange is formed, the diameter of which is larger than that of the enveloping circle of the lateral surface, and the length of the metal sleeve is the same with the distance between the two flanges.

Bei einer dritten vorteilhaften Ausfüh­rungsform der erfindungsgemässen Anordnung haben die Flansche einen aus ihrer Stirnfläche hervorragenden, ringartigen Dichtungsprofil.In a third advantageous embodiment of the arrangement according to the invention, the flanges have an annular sealing profile which protrudes from their end face.

Bei einer vierten vorteilhaften Ausfüh­rungsform der erfindungsgemässen Anordnung ist an der Aussenfläche der Metallhülse an beiden Seiten der Auf­schlitzung ein oder mehrere Klemmringe ausgebildet, in denen tangentiale Bohrung/en/ ist/sind.In a fourth advantageous embodiment of the arrangement according to the invention, one or more clamping rings are formed on the outer surface of the metal sleeve on both sides of the slit, in which tangential bores are.

Schliesslich ist bei einer fünften vor­teilhaften Ausführungsform der erfindungsgemässen An­ordnung die Metallhülse mit zwei Aufschlitzungenn in zwei Halbteile geteilt und neben beiden Aufschlitzungen sind Klemmflächen ausgebildet.Finally, in a fifth advantageous embodiment of the arrangement according to the invention, the metal sleeve with two slits is divided into two half parts and clamping surfaces are formed next to both slits.

Die Erfindung wird nachstehend aufgrund Ausführungsbeispiele mit Hilfe der beiliegenden Zeich­nungen näher erläutert. Es zeigen

  • Fig. 1 - den erfindungsgemässen Stator in Halblängs­schnitt-Halbansicht,
  • Fig. 2 - den Schnitt I nach Fig. 1.
The invention is explained below on the basis of exemplary embodiments with the aid of the accompanying drawings. Show it
  • 1 - the stator according to the invention in half longitudinal section half view,
  • 2 - the section I of FIG. 1st

In Fig. 1 ist die Anordnung des Stators in Halbschnitt-Halbansicht dargestellt. Zwecks besseren Verständnis ist der Stator 1 mit dicker Linie, die diesen umnehmende Metallhülse 2 - als wäre sie durch­sichtig - mit dünner Linie angedeutet.In Fig. 1 the arrangement of the stator is shown in half-section half-view. For the better Understanding is the stator 1 with a thick line, which indicates this surrounding metal sleeve 2 - as if it were transparent - with a thin line.

Die Innenfläche B des Stators 1 aus elasto­merem Material ist ein Gewindeprofil mit zwei Anschnit­ten, und die äussere Mantelfläche P ist eine Polygon­fläche.The inner surface B of the stator 1 made of elastomeric material is a threaded profile with two gates, and the outer surface P is a polygon surface.

In Fig. 2 ist es zu sehen, dass die Mantel­fläche P durch sechs derart gebogene Mantelstücke ge­bildet ist, deren Zentriwinkel φ und Radius r gleich ist. Der Abstand t zwischen der beim Treffen der Mantel­stücke entstehenden Kante e und der Mittellinie ist geringer als der Abstand T zwischen der von zwei be­nachbarten Mantelstücken gemeinsamen Berührungsebene S und der Mittellinie. Es ist zu sehen, dass diese Polygon­fläche gewissermassen von der im technischen Leben üb­lichen Polygonfläche abweichend ist, wo mehr oder weni­ger gebogene konvexe Strecken einander abwechseln.In Fig. 2 it can be seen that the lateral surface P is formed by six jacket pieces bent in this way, the central angle φ and radius r of which are the same. The distance t between the edge e arising when the casing pieces meet and the center line is less than the distance T between the contact plane S common to two adjacent casing pieces and the center line. It can be seen that this polygon surface is to a certain extent different from the polygon surface common in technical life, where more or less curved convex sections alternate.

Bei dem Treffen der Mantelstücke kann auch eine gebogene Durchgangsfläche sein, was die Festigkeit des Stators 1 erhöht.When the casing pieces meet, there can also be a curved passage surface, which increases the strength of the stator 1.

Der Stator 1 ist durch eine derartige Me­tallhülse 2 umnommen, deren innere Mantelfläche sich vollständig an die äussere Mantelfläche P des Stators 1 anpasst.The stator 1 is encased by such a metal sleeve 2, the inner lateral surface of which completely adapts to the outer lateral surface P of the stator 1.

Die Metallhülse 2 ist mittels zwei längsgerichteten Aufschlitzungen 3 und 4 in zwei Halbteile geteilt. Neben den Aufschlitzungen 3 und 4 aussen sind je ein Klemmring 5 ausgebildet, der sich der ganzen Länge der Metallhülse 2 entlang verbreitet. In den Klemmringen 5 sind tangential angeordnete Boh­rungen 6.The metal sleeve 2 is divided into two half parts by means of two longitudinal slits 3 and 4. In addition to the slits 3 and 4 outside, a clamping ring 5 is formed, which extends along the entire length of the metal sleeve 2. Bores 6 are arranged tangentially in the clamping rings 5.

An den zwei Enden des Stators 1 ist je ein Flansch 7 ausgebildet. Der Durchmesser D der Flan­sche 7 ist grösser als der Durchmesser d des Umhüll­kreises der Mantelfläche P. Aus der Stirnfläche 8 der Flansche 7 ragt ein ringförmiger Dichtungsprofil 9 hervor. Das ist ähnlich des Halbteils eines "O"-RingesA flange 7 is formed at each of the two ends of the stator 1. The diameter D of the flanges 7 is larger than the diameter d of the enveloping circle of the circumferential surface P. An annular sealing profile 9 protrudes from the end face 8 of the flanges 7. This is similar to the half part of an "O" ring

Die Länge l des Stators 1 zwischen den Flanschen 7 und die Länge L der Metallhülse sind gleich.The length l of the stator 1 between the flanges 7 and the length L of the metal sleeve are the same.

Die erfindungsgemässe Anordnung kann wie folgt verwendet werden.The arrangement according to the invention can be used as follows.

Nach dem Einsetzen des Stators 1 pressen wir die Metallhülse mit Hilfe der in den Bohrungen 6 angeordneten Schrauben bis zum Mass der vorgeschrie­benen Anpassung des Stators 1 und der darin rotieren­den Spiralpumpe zusammen. Nun verhindert die Polygon­ausbildung der Mantelfläche P, dass sich der Stator 1 im Vergleich zur Metallhülse 2 verdreht.After inserting the stator 1, we press the metal sleeve together using the screws arranged in the bores 6 to the extent of the prescribed adaptation of the stator 1 and the spiral pump rotating therein. Now the polygon formation of the lateral surface P prevents the stator 1 from rotating in comparison to the metal sleeve 2.

Danach kann der Stator 1 in die Exzenter­Spiralpumpe eingebaut werden. Der an den Flanschen 7 befindliche Dichtungsprofil 9, wie es durch seine Form angedeutet ist, wird sich als ein "O"-Ring benehmen, der zur Dichtung von Stirnflächen verwendet ist.The stator 1 can then be installed in the eccentric spiral pump. The sealing profile 9 located on the flanges 7, as indicated by its shape, will behave as an "O" ring which is used for sealing end faces.

Dieser Dichtungsprofil 9 verhindert, dass das geförderte Medium den Flansch 7 von der Druckseite umgeht und so zwischen den Stator 1 und die Metallhülse 2 gelangt. Es ist offenbar, dass die Länge L der Metall­hülse 2 aus dem Grund mit der Länge l des Stators 1 gleich sein soll, damit sie den Flanschen 7 entspre­chende Unterstützung geben kann.This sealing profile 9 prevents the pumped medium from bypassing the flange 7 from the pressure side and thus getting between the stator 1 and the metal sleeve 2. It is evident that the length L of the metal sleeve 2 should therefore be the same as the length l of the stator 1 so that it can give the flanges 7 appropriate support.

Der oben bekanntgemachten Aufgabe würde auch eine derartige äussere Mantelfläche P entsprechen, die entweder gerippt, oder vieleckig usw. ist.The above-mentioned task would also correspond to such an outer lateral surface P, which is either ribbed or polygonal, etc.

Die unserseits gewählte Form hat aber auch eine weitere Aufgabe, und zwar bei der Nachstel­lung des Stators 1.The form chosen by us also has another task, namely when adjusting the stator 1.

Die Innenfläche B des Stators 1 verschleisst stark während des Betriebs. Das wurde auch bisher mit der Deformation des Stators 1 kompensiert, das war aber wegen der ungleichen Deformation nicht vollständig und führte zu ungleichmässigen Verschleiss.The inner surface B of the stator 1 wears out heavily during operation. This was previously compensated for by the deformation of the stator 1, but this was not complete due to the uneven deformation and led to uneven wear.

Durch die bekanntgemachte Polygonfläche wird auch diese Mangelhaftigkeit beseitigt. Die Bögen mit Radius r haben nämlich als Erfolg, dass obwohl die Metallhülse 2 nur von einer einzigen Richtung zu­sammengedrückt wird, die gebogenen Flächen die ent­stehende Druckkraft auf diejenige Weise in das Innere des Stators 1 übermitteln, als wenn die Mantelfläche P zylinderförmig wäre und ein gleichmässiger Aussen­druck darauf auswirken würden. Diese Eigenschaft der Polygonfläche hat zum Erfolg, dass die Deformation der Innenfläche B gleichmässig ist. Der Verschleiss kann also mittels einfachem Zusammendrücken der Metallhülse 2 verzerrungsfrei beseitigt werden.This deficiency is also eliminated by the known polygon area. The arches With radius r namely as a success that although the metal sleeve 2 is compressed only from a single direction, the curved surfaces transmit the resulting pressure force into the interior of the stator 1 in such a way as if the outer surface P were cylindrical and a uniform external pressure thereon would impact. This property of the polygon surface has the effect that the deformation of the inner surface B is uniform. The wear can thus be eliminated without distortion by simply pressing the metal sleeve 2 together.

Es soll bemerkt werden, dass selbstver­ständlich auch andere Polygonforme verwendet werden können. Sie soll jeweils vom Material des gegebenen Stators, von der Form seiner Innenfläche abhängig ausgebildet werden. Das bezieht sich z.B. auf die An­zahl der Bögen, den Radius.It should be noted that other polygon shapes can of course also be used. It should be designed depending on the material of the given stator and the shape of its inner surface. This relates e.g. on the number of arcs, the radius.

Auch die Metallhülse 2 kann mit einer einzigen, oder gar mit mehr als zwei Aufschlitzungen gefertigt werden. Das ist in erster Reihe durch das Material und die Form des Stators 1, und andererseits durch die Anordnung in der Pumpe beeinflusst.The metal sleeve 2 can also be manufactured with a single, or even with more than two slits. This is primarily influenced by the material and the shape of the stator 1, and on the other hand by the arrangement in the pump.

Claims (6)

1. Anordnung des Stators /1/ von exzentri­schen Spiralpumpen, dessen Material elastomer ist und dessen Innenfläche /B/ über Gewindeprofil mit zwei oder mehreren Anschnitten verfügt, dadurch gekenn­zeichnet, dass die äussere Mantelfläche /P/ des Stators /1/ eine Polygonfläche ist, und der Stator /1/ durch eine Metallhülse /2/ umnommen ist, deren innere Mantelfläche sich an der äusseren Mantelfläche 1P1 des Stators /1/ anpasst, und die mit mindestens einer Auf­schlitzung /3/ aufgeschnitten ist.1. arrangement of the stator / 1 / of eccentric spiral pumps, the material of which is elastomeric and the inner surface / B / of which has a threaded profile with two or more gates, characterized in that the outer lateral surface / P / of the stator / 1 / is a polygon surface, and the stator / 1 / is encased by a metal sleeve / 2 /, the inner circumferential surface of which conforms to the outer circumferential surface 1P1 of the stator / 1 / and which is cut open with at least one slit / 3 /. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Polygonfläche des Aussenmantels /P/ des Stators /1/ durch Mantelstücke gleichen Zentriwinkels /φ/ und gleichen Bogens /r/ ge­bildet ist, und die Treffkante /e/ der benachbarten Mantelstücke oder die zwischen diese ausgebildete Durchgangsfläche im Ganzen zwischen der von zwei Man­telstücken gemeinsamen Berührungsebene /S/ und der Mittellinie des Stators /1/ liegt.2. Arrangement according to claim 1, characterized in that the polygonal surface of the outer jacket / P / the stator / 1 / is formed by jacket pieces of the same central angle / φ / and the same arc / r /, and the hitting edge / e / of the adjacent jacket pieces or lies between this formed passage area as a whole between the contact plane / S / shared by two jacket pieces and the center line of the stator / 1 /. 3. Anordnung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass an beiden Enden des Stators /1/ ein Flansch /7/ ist, dessen Durch­messer /D/ grösser als der Durchmesser /d/ des Umhüll­ kreises der Mantelfläche ist, und die Länge /L/ der Metallhülse /2/ mit dem Abstand /l/ zwischen den zwei Flanschen /7/ gleich ist.3. Arrangement according to claim 1 or 2,
characterized in that at both ends of the stator / 1 / is a flange / 7 / whose diameter / D / is larger than the diameter / d / of the envelope circle of the lateral surface, and the length / L / the metal sleeve / 2 / with the distance / l / between the two flanges / 7 / is the same. 4. Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Flansche /7/ einen aus ihrer Stirnfläche /8/ her­vorragenden, ringartigen Dichtungsprofil /9/ haben.4. Arrangement according to one of claims 1 to 3, characterized in that the flanges / 7 / one from their end face / 8 / outstanding, ring-like sealing profile / 9 /. 5. Anordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass an der Aussenfläche der Metallhülse /2/ an beiden Seiten der Aufschlitzung /3, 4/ ein oder mehrere Klemmringe /5/ ausgebildet ist/sind, in dem/denen tangentiale Bohrung/en/ ist/sind.5. Arrangement according to one of claims 1 to 4, characterized in that on the outer surface of the metal sleeve / 2 / on both sides of the slitting / 3, 4 / one or more clamping rings / 5 / is / are formed, in which / which tangential Hole / s / is / are. 6. Anordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Metallhülse /2/ mittels zwei Aufschlitzungen /3, 4/ in zwei Halbteile geteilt ist, und neben bei­den Aufschlitzungen /3, 4/ Klemmringe /5/ ausgebildet sind.6. Arrangement according to one of claims 1 to 5, characterized in that the metal sleeve / 2 / by means of two slits / 3, 4 / is divided into two half parts, and in addition to both slits / 3, 4 / clamping rings / 5 / are formed.
EP19900101298 1989-01-23 1990-01-23 Stator arrangement for eccentric spiral pumps Withdrawn EP0380050A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU25189 1989-01-23
HU25189A HU204116B (en) 1989-01-23 1989-01-23 Arrangement for the standing part of eccentric worm pump

Publications (2)

Publication Number Publication Date
EP0380050A2 true EP0380050A2 (en) 1990-08-01
EP0380050A3 EP0380050A3 (en) 1991-02-20

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ID=10948732

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EP19900101298 Withdrawn EP0380050A3 (en) 1989-01-23 1990-01-23 Stator arrangement for eccentric spiral pumps

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EP (1) EP0380050A3 (en)
CS (1) CS23090A2 (en)
DD (1) DD294067A5 (en)
HU (1) HU204116B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318416A (en) * 1991-05-22 1994-06-07 Netzsch-Mohnopumpen Gmbh Casing of an eccentric worm pump designed to burst at preselected pressure
EP0612922A1 (en) * 1993-02-22 1994-08-31 Mono Pumps Limited Progressive cavity pump or motors
DE102006021897A1 (en) * 2006-05-11 2007-11-15 Netzsch-Mohnopumpen Gmbh Statormantel for eccentric screw pump
FR2948424A1 (en) * 2009-07-23 2011-01-28 Pcm PROGRESSIVE CAVITY PUMP AND ASSOCIATED PUMPING DEVICE
EP2660471A1 (en) * 2010-12-27 2013-11-06 Heishin Ltd. Uniaxial eccentric screw pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163148B (en) * 1959-06-11 1964-02-13 Seeberger K G Maschinen & Gera Screw pump
DE2930068A1 (en) * 1979-07-25 1981-03-19 Kurt-Joachim 3000 Hannover Ganz Eccentric worm pump for conveying abrasive materials - has resilient stator in mantle with indented longitudinal grooves and adjustable clamp rings around mantle
DE2937403A1 (en) * 1979-09-15 1981-04-02 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Stator for eccentric-screw pump - comprises rubber or elastomer moulding with integral seals which overlap housing ends
EP0292594A1 (en) * 1987-05-27 1988-11-30 FOREG Aktiengesellschaft Stator for a Moineau pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163148B (en) * 1959-06-11 1964-02-13 Seeberger K G Maschinen & Gera Screw pump
DE2930068A1 (en) * 1979-07-25 1981-03-19 Kurt-Joachim 3000 Hannover Ganz Eccentric worm pump for conveying abrasive materials - has resilient stator in mantle with indented longitudinal grooves and adjustable clamp rings around mantle
DE2937403A1 (en) * 1979-09-15 1981-04-02 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Stator for eccentric-screw pump - comprises rubber or elastomer moulding with integral seals which overlap housing ends
EP0292594A1 (en) * 1987-05-27 1988-11-30 FOREG Aktiengesellschaft Stator for a Moineau pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318416A (en) * 1991-05-22 1994-06-07 Netzsch-Mohnopumpen Gmbh Casing of an eccentric worm pump designed to burst at preselected pressure
EP0612922A1 (en) * 1993-02-22 1994-08-31 Mono Pumps Limited Progressive cavity pump or motors
US5474432A (en) * 1993-02-22 1995-12-12 Mono Pumps Limited Progressive cavity pump or motors
DE102006021897A1 (en) * 2006-05-11 2007-11-15 Netzsch-Mohnopumpen Gmbh Statormantel for eccentric screw pump
DE102006021897B4 (en) * 2006-05-11 2009-11-19 Netzsch-Mohnopumpen Gmbh Stator jacket for progressing cavity pumps
FR2948424A1 (en) * 2009-07-23 2011-01-28 Pcm PROGRESSIVE CAVITY PUMP AND ASSOCIATED PUMPING DEVICE
EP2660471A1 (en) * 2010-12-27 2013-11-06 Heishin Ltd. Uniaxial eccentric screw pump
EP2660471A4 (en) * 2010-12-27 2015-01-21 Heishin Ltd Uniaxial eccentric screw pump

Also Published As

Publication number Publication date
HU204116B (en) 1991-11-28
DD294067A5 (en) 1991-09-19
HUT53197A (en) 1990-09-28
CS23090A2 (en) 1991-08-13
EP0380050A3 (en) 1991-02-20

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