EP3308025B1 - Pump housing for an eccentric screw pump, and eccentric screw pump equipped therewith - Google Patents

Pump housing for an eccentric screw pump, and eccentric screw pump equipped therewith Download PDF

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Publication number
EP3308025B1
EP3308025B1 EP16745407.3A EP16745407A EP3308025B1 EP 3308025 B1 EP3308025 B1 EP 3308025B1 EP 16745407 A EP16745407 A EP 16745407A EP 3308025 B1 EP3308025 B1 EP 3308025B1
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EP
European Patent Office
Prior art keywords
stator
pump
pump housing
guide surface
flange element
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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Application number
EP16745407.3A
Other languages
German (de)
French (fr)
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EP3308025A1 (en
Inventor
Mikael Tekneyan
Philipp NUEBL
Magdalena BRUENING
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Netzsch Pumpen and Systeme GmbH
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Netzsch Pumpen and Systeme GmbH
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Application filed by Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP3308025A1 publication Critical patent/EP3308025A1/en
Application granted granted Critical
Publication of EP3308025B1 publication Critical patent/EP3308025B1/en
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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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/70—Disassembly methods

Definitions

  • the invention relates to a pump housing for an eccentric screw pump according to the preamble of claim 1 and an eccentric screw pump with such a pump housing.
  • the object of the invention is to provide a pump housing for an eccentric screw pump which enables easy access to the interior of the housing and easy removal of the eccentric screw pump arrangement.
  • the main housing body has a circular segment-shaped axial guide surface opposite the cover, a stator flange element complementary to the guide surface, in particular its sealing flange, can be guided axially displaceably by the main housing body.
  • a stator flange element complementary to the guide surface, in particular its sealing flange, can be guided axially displaceably by the main housing body.
  • annular segment-shaped means an annular segment surface with a predetermined radius around the longitudinal axis.
  • the guide surface is preferably located in the lower half of the main housing body, in particular on the inside at the bottom of the main housing body.
  • stator flange element which is displaceably guided on the guide surface can be removed radially upward through the cover opening in the main housing body.
  • a stator flange element that can be coupled to the pump housing is axially displaceable on the guide surface and that the cover fastened to the main housing body prevents the stator flange element from being displaced in the direction of the opening on the drive side.
  • the pump housing and the stator flange element can form a pump housing assembly, which then fits into an existing eccentric screw pump can be installed.
  • Such a structure also offers protection of the stator flange element against rattling when the pump housing is being transported with the cover installed.
  • the stator flange element preferably comprises a hollow cylinder which has a radial guide collar, which can be designed as a sealing flange, at its one drive-side end and a radial stator flange collar at its other, pump-side end, the stator flange element with its guide collar resting on the guide surface and the stator flange collar at a distance from the pump-side opening and can be brought into operative connection with a stator.
  • the stator flange collar advantageously prevents the stator flange element from being completely displaceable into the main housing body when the cover is removed. In this way, the axial displaceability of the stator flange element is limited when the cover is removed, so that correct placement of the stator flange element in the main housing body is easier to accomplish before the cover is fastened to the main housing body.
  • the guide collar of the stator flange element has a chamfer that is complementary to a chamfer of the radially inwardly extending projection of the cover, so that as the cover approaches the main housing body as it is being fastened to one another, the stator flange element placed therebetween axially into that of the rotor-side opening of the Pump housing is moved in the opposite direction and secured against backward movement.
  • the axial guide surface preferably runs only in an area of the main housing body covered by the cover, since machining of the guide surface in the production of the main housing body in the cover opening region is easier in this way.
  • the area covered by the cover is to be understood as a projection of the cover perpendicular to the longitudinal axis onto the main housing body.
  • the cover is preferably provided with an annular circumferential inner circumferential surface opposite the guide surface, which has the same distance radially from the longitudinal axis as the guide surface and is delimited axially on the inside by a radially inwardly extending projection of the cover, which is preferably located opposite the guide surface ,
  • the opposite, Circular segment-shaped inner circumferential surface which has the same distance radially from the longitudinal axis as the guide surface, forms together with the guide surface a closed circular surface, which serves to receive the sealing flange of a complementary, circular stator flange element, which is preferably fluid-tight on such an annular surface with an O-ring rests to seal the cavity of the pump housing from the outside.
  • cover projection towards the longitudinal axis which is preferably opposite from the guide surface of the main housing body and preferably limits the inner peripheral surface of the cover axially such that the guide surface of the main housing body extends further to the drive side of the main housing body than the inner peripheral surface, one on the guide surface and the inner circumferential surface of the stator flange element which is prevented from being displaced in the direction of the drive-side opening by means of the cover projection when the cover is attached to the housing body.
  • the guide surface is axially at least twice as long as the inner circumferential surface in the form of an annular segment, since it can thus be reliably determined whether a stator flange element is in a position displaced in the direction of the drive-side opening, in which the cover should not be attached to the main housing body.
  • the guide surface is delimited axially on the outside by a radial projection of the main housing body.
  • a projection means that a stator flange element guided on the guide surface cannot be pushed axially out of the main housing body, and at the same time represents a positioning stop which determines the correct installation position of an assembly consisting of rotor, stator and stator flange element.
  • the guide surface is further interrupted by a step-like inward projecting fixing projection which divides the guide surface into a pump-side holding area and a drive-side guide area, the holding area extending between the positioning stop and the fixing projection in a groove-like manner in the circumferential direction such that the sealing flange of the stator flange element therein can preferably be inserted in a form-fitting manner in order to fix the stator flange element axially both in the pump-side direction and in the drive-side direction.
  • An axially pump-side edge of the fixing projection is advantageously aligned with an axially pump-side edge of the cover projection in a plane perpendicular to the longitudinal axis.
  • a stator flange element collar (sealing flange) introduced into the holding area of the guide surface is thus secured against displacement in the drive-side direction of the pump housing by the cover and the main housing body.
  • a contact plane between the cover and the main housing body extends obliquely to the longitudinal axis of the pump housing. This enables easier production and assembly of the cover and a better seal between the cover and the main housing body due to the possibility of using a flat sealing element.
  • the main housing body advantageously has a recess which is provided for receiving a flat sealing element and prevents the seal from slipping or falling off during the cover assembly.
  • the main housing body limits the axial displaceability of the stator flange element in a direction away from the drive-side opening, thereby preventing the stator flange element from axially falling out of the pump housing.
  • at least one of the positioning or fixing projections already described is advantageously present.
  • stator flange element is arranged between the stator and the pump housing in such a way that, when the cover is fastened, it fixes a stator end in a complementary stator receptacle of the connecting piece, the stator cannot be removed from the eccentric screw pump when the cover is fastened. H. the cover fixes the stator in its installation position via the stator flange element.
  • stator with the cover removed, can be displaced axially from the connecting piece in the direction of the pump housing such that it detaches from the stator receptacle of the connecting piece. This enables space-saving radial removal of the stator from the eccentric screw pump.
  • the stator, the rotor and the stator flange element preferably form an assembly which can also be supplemented by a coupling element fastened to the drive-side rotor end.
  • the stator, the rotor, the The stator flange element, a coupling element fastened to the drive-side rotor end and a pump-side cardan shaft section adjoining the drive-side end of the coupling element form an assembly, the pump-side cardan shaft section being detachably connected to a further drive-side cardan shaft section which corresponds to the required axial displacement distance of the module, in order to remove the latter from the eccentric screw pump being able to take out;
  • the cavity of the pump housing and the other components located therein are then accessible for maintenance or assembly and disassembly.
  • the required non-rotatable, releasable connection with a sufficient axial displacement distance can also be provided in the coupling element instead of in the cardan shaft according to the same principle.
  • the stator flange element is preferably formed in one piece with the stator.
  • the Fig. 1 shows a pump housing 10 in a drive train of an eccentric screw pump 100, which consists of a tubular main housing body 12 and a cover 14 attachable thereon and a U-shaped seal 16 arranged between the two.
  • the pump housing 10 has an axially extending cavity H, which extends between two end-side openings P, A, ie between a pump-side opening P and a drive-side opening A.
  • the pump-side opening P is enclosed by the main housing body 12 and the cover 14 which is removably attached to it.
  • a contact plane K between the main housing body 12 and the cover 14 extends obliquely to a longitudinal axis L of the pump housing 10 ( Fig. 2 ).
  • To attach the cover 14 to the main housing body 12 are provided with cover bores 18 and matching main housing bores 20 into which screws 19 ( Fig. 3 ) are introduced.
  • the main housing body 12 has an annular segment-shaped guide surface F which lies opposite the cover 14 and extends in the circumferential direction and extends only in an area of the main housing body 12 covered by the cover 14.
  • the guide surface F is delimited axially on the outside by a pump-side projection 22 of the main housing body 12.
  • the guide surface F is interrupted by a radially inwardly projecting fixing projection 24, the purpose of which is described below.
  • a fixing projection 24 is not necessary, so that an uninterrupted guide surface F can also be present.
  • the cover 14 has an inner circumferential surface TF which is opposite the guide surface F and which is spaced radially from the longitudinal axis L by the same distance as the guide surface F and is axially delimited on the inside by a drive-side projection 26 in the cover 14.
  • the Fig. 2 shows a with the pump housing 10 from Fig. 1 axially slidably coupled stator flange element 50 on the guide surface F, the stator flange element 50 being slidable only when the cover 14 is removed.
  • the stator flange element 50 essentially has the shape of a hollow cylinder ( Fig. 3 ), which has a radial guide collar 52 designed as a sealing flange at its one drive-side end and a radial stator flange collar 54 at its other pump-side end, the stator flange element 50 resting with its guide collar 52 on the guide surface F and the stator flange collar 54 from the pump side Opening P is spaced outward from the pump housing 10.
  • the cover 14 attached to the main housing body 12 prevents displacement of the stator flange element 50 in the direction of the drive-side opening A by means of its projection 26.
  • the main housing body 12 with its projection 22 limits the axial displacement of the stator flange element 50 in the opposite direction by the stator flange collar 54 bumps against the projection 22.
  • the main housing body 12 in turn can limit the axial displaceability of the stator flange element 50 in a direction to the drive-side opening A by means of the fixing projection 24.
  • the guide collar 52 of the stator flange element 50 can have a chamfer (not shown) have, which is complementary to a chamfer, also not shown, of the radially inwardly extending projection 26 of the cover 14, so that as the cover 14 progressively approaches the main housing body 12 when they are attached to one another, the stator flange element 50 placed therebetween axially into that of the rotor-side opening A the pump housing 10 is moved in the opposite direction and is secured against wandering back.
  • FIG. 3 and 4 show an example of a removal process on an eccentric screw pump 100 with a drive unit 102, an adjoining two-part propeller shaft with a drive-side part 104 and a pump-side part 106, a coupling element 108, a rotor 110, a stator 112 surrounding the rotor 110 with a stator end 112a, that fits into a connecting piece 114 with a stator receptacle 114a complementary to the stator end 112a.
  • stator flange element 50 which can be formed in one piece with the stator 112, is arranged between the stator 112 and the pump housing 10 in such a way that when the cover 14 is fastened, the stator end 112a is fixed in the complementary stator receptacle 114a of the connecting piece 114.
  • the pump 100 is fixedly connected to a base B in the area of the drive unit 102 and the connecting piece 114.
  • the Fig. 3 shows in particular a state of the eccentric screw pump 100, in which the cover 14 of the pump housing 10 has already been removed, the non-rotatable connection (not shown) of both cardan shaft 104, 106 separated by the cover opening in the main housing body 12 and the assembly consisting of rotor 110, stator 112, stator flange 50, coupling element 108 and part of the propeller shaft 106 on the pump side has already been displaced in the direction of the drive side by a distance x 1 + x 2 , where x 1 is the axial depth of the stator receptacle 114a in the connecting piece 114 and x 2 is a minimal shunting distance to the connecting piece 114.
  • stator flange element 50 and thus also the stator 112 with the cover 14 removed can be displaced axially from the connecting piece 114 in the direction of the pump housing 10 such that it can detach from the stator receptacle 114a of the connecting piece 114.
  • the assembly which can be removed in this way can also be formed only from stator 112, rotor 110 and stator flange element 50, since a releasable, rotationally fixed connection is also possible by means of a two-part coupling element 108 (not shown).

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

Description

Die Erfindung betrifft ein Pumpengehäuse für eine Exzenterschneckenpumpe gemäß dem Oberbegriff des Patentanspruchs 1 und eine Exzenterschneckenpumpe mit einem solchen Pumpengehäuse.The invention relates to a pump housing for an eccentric screw pump according to the preamble of claim 1 and an eccentric screw pump with such a pump housing.

Aus den Dokumenten US 5 688 114 A und US 3 804 561 A ist eine Exzenterschneckenpumpe gemäß dem Oberbegriff des Patentanspruchs 1 bekannt. Eine andere Lösung ist aus dem Dokument EP 2 205 872 B1 bekannt. Weiterer Stand der Technik findet sich in dem Dokument DE 10 2008 021 919 A1 .From the documents US 5 688 114 A and US 3,804,561 A an eccentric screw pump according to the preamble of claim 1 is known. Another solution is from the document EP 2 205 872 B1 known. Further state of the art can be found in the document DE 10 2008 021 919 A1 ,

Die Erfindung hat die Aufgabe, ein Pumpengehäuse für eine Exzenterschneckenpumpe bereitzustellen, das einen einfachen Zugang zum Gehäuseinneren sowie eine leichte Demontierbarkeit der Exzenterschneckenpumpenanordnung ermöglicht.The object of the invention is to provide a pump housing for an eccentric screw pump which enables easy access to the interior of the housing and easy removal of the eccentric screw pump arrangement.

Die Aufgabe ist erfindungsgemäß durch ein Pumpengehäuse für eine Exzenterschneckenpumpe gelöst, das die im Patentanspruch 1 genannten Merkmale aufweist.The object is achieved by a pump housing for an eccentric screw pump, which has the features mentioned in claim 1.

Dadurch, dass der Hauptgehäusekörper eine dem Deckel gegenüberliegende, kreisringsegmentförmige axiale Führungsfläche aufweist, kann ein zur Führungsfläche komplementäres Statorflanschelement, insbesondere dessen Dichtungsflansch, vom Hauptgehäusekörper axial verschiebbar geführt werden. Dabei bedeutet "dem Deckel gegenüberliegend" auf der anderen Seite einer die Längsachse des Pumpengehäuses einschließenden waagerechten Ebene, und "kreisringsegmentförmig" eine Kreisringsegmentfläche mit einem vorbestimmten Radius um die Längsachse. Vorzugsweise befindet sich die Führungsfläche in der unteren Hälfte des Hauptgehäusekörpers, insbesondere innen am Boden des Hauptgehäusekörpers. Auf diese Weise wird sichergestellt, dass ein auf der Führungsfläche verschiebbar geführtes Statorflanschelement durch die Deckelöffnung im Hauptgehäusekörper radial nach oben herausgenommen werden kann. Erfindungsgemäß ist ferner vorgesehen, dass ein mit dem Pumpengehäuse koppelbares Statorflanschelement auf der Führungsfläche axial verschiebbar ist und der am Hauptgehäusekörper befestigte Deckel eine Verschiebung des Statorflanschelements in Richtung der antriebsseitigen Öffnung verhindert. Das Pumpengehäuse und das Statorflanschelement können eine Pumpengehäusebaugruppe bilden, die dann in eine bestehende Exzenterschneckenpumpe eingebaut werden kann. Ein derartiger Aufbau bietet zudem einen Schutz des Statorflanschelements vor einem Klappern beim Transport des Pumpengehäuses bei montiertem Deckel. Des weiteren können Montagefehler vermieden werden, da erst der Deckel abgenommen werden muss, bevor das Statorflanschelement in Richtung der antriebsseitigen Öffnung des Pumpengehäuses verschoben werden kann, so dass sich die axiale Gesamtlänge der Pumpengehäusebaugruppe zur Montage in eine Exzenterschneckenpumpe verringern lässt. Das Statorflanschelement umfasst vorzugsweise einen Hohlzylinder, der an seinem einen, antriebsseitigen Ende einen radialen Führungskragen, der als Dichtungsflansch ausgebildet sein kann, und an seinem anderen, pumpenseitigen Ende einen radialen Statorflanschkragen hat, wobei das Statorflanschelement mit seinem Führungskragen auf der Führungsfläche aufliegt und der Statorflanschkragen von der pumpenseitigen Öffnung nach außen beabstandet und mit einem Stator in Wirkverbindung bringbar ist. Vorteilhafterweise verhindert der Statorflanschkragen, dass das Statorflanschelement bei abgenommenem Deckel vollständig in den Hauptgehäusekörper hinein verschiebbar ist. Auf diese Weise wird die axiale Verschiebbarkeit des Statorflanschelements bei abmontiertem Deckel begrenzt, so dass eine korrekte Platzierung des Statorflanschelements im Hauptgehäusekörper vor einer Befestigung des Deckels am Hauptgehäusekörper einfacher zu bewerkstelligen ist. Vorteilhaft weist der Führungskragen des Statorflanschelements eine Fase auf, die komplementär zu einer Fase des sich radial einwärts erstreckenden Vorsprungs des Deckels ist, so dass mit fortschreitender Annäherung des Deckels an den Hauptgehäusekörper bei deren Befestigung aneinander das dazwischen platzierte Statorflanschelement axial in die der rotorseitigen Öffnung des Pumpengehäuses entgegengesetzte Richtung verschoben und gegen ein Zurückwandern gesichert wird.Characterized in that the main housing body has a circular segment-shaped axial guide surface opposite the cover, a stator flange element complementary to the guide surface, in particular its sealing flange, can be guided axially displaceably by the main housing body. Here, "opposite the cover" on the other side of a horizontal plane enclosing the longitudinal axis of the pump housing, and "annular segment-shaped" means an annular segment surface with a predetermined radius around the longitudinal axis. The guide surface is preferably located in the lower half of the main housing body, in particular on the inside at the bottom of the main housing body. In this way it is ensured that a stator flange element which is displaceably guided on the guide surface can be removed radially upward through the cover opening in the main housing body. According to the invention, it is further provided that a stator flange element that can be coupled to the pump housing is axially displaceable on the guide surface and that the cover fastened to the main housing body prevents the stator flange element from being displaced in the direction of the opening on the drive side. The pump housing and the stator flange element can form a pump housing assembly, which then fits into an existing eccentric screw pump can be installed. Such a structure also offers protection of the stator flange element against rattling when the pump housing is being transported with the cover installed. Furthermore, assembly errors can be avoided, since the cover must first be removed before the stator flange element can be moved in the direction of the drive-side opening of the pump housing, so that the overall axial length of the pump housing assembly for installation in an eccentric screw pump can be reduced. The stator flange element preferably comprises a hollow cylinder which has a radial guide collar, which can be designed as a sealing flange, at its one drive-side end and a radial stator flange collar at its other, pump-side end, the stator flange element with its guide collar resting on the guide surface and the stator flange collar at a distance from the pump-side opening and can be brought into operative connection with a stator. The stator flange collar advantageously prevents the stator flange element from being completely displaceable into the main housing body when the cover is removed. In this way, the axial displaceability of the stator flange element is limited when the cover is removed, so that correct placement of the stator flange element in the main housing body is easier to accomplish before the cover is fastened to the main housing body. Advantageously, the guide collar of the stator flange element has a chamfer that is complementary to a chamfer of the radially inwardly extending projection of the cover, so that as the cover approaches the main housing body as it is being fastened to one another, the stator flange element placed therebetween axially into that of the rotor-side opening of the Pump housing is moved in the opposite direction and secured against backward movement.

Des Weiteren verläuft die axiale Führungsfläche vorzugsweise nur in einem vom Deckel überdeckten Bereich des Hauptgehäusekörpers, da eine Bearbeitung der Führungsfläche bei der Herstellung des Hauptgehäusekörpers in dem Deckelöffnungsbereich auf diese Weise einfacher ist. Dabei ist der vom Deckel überdeckte Bereich als eine Projektion des Deckels senkrecht zur Längsachse auf den Hauptgehäusekörper zu verstehen.Furthermore, the axial guide surface preferably runs only in an area of the main housing body covered by the cover, since machining of the guide surface in the production of the main housing body in the cover opening region is easier in this way. The area covered by the cover is to be understood as a projection of the cover perpendicular to the longitudinal axis onto the main housing body.

Vorzugsweise ist darüber hinaus der Deckel mit einer der Führungsfläche gegenüberliegenden, kreisringsegmentförmige Innenumfangsfläche versehen, die radial von der Längsachse den gleichen Abstand wie die Führungsfläche hat und axial innen von einem sich radial einwärts erstreckenden Vorsprung des Deckels begrenzt ist, der sich vorzugsweise gegenüber der Führungsfläche befindet. Die gegenüberliegende, kreisringsegmentförmige Innenumfangsfläche, die radial von der Längsachse den gleichen Abstand wie die Führungsfläche hat, bildet zusammen mit der Führungsfläche eine geschlossene Kreisringfläche aus, die zur Aufnahme des Dichtungsflansches eines komplementären, kreisförmigen Statorflanschelements dient, der vorzugsweise mit einem O-Ring fluiddicht auf einer solchen Kreisringfläche aufliegt, um den Hohlraum des Pumpengehäuses nach außen hin abzudichten. Durch den beschriebenen Deckelvorsprung zur Längsachse hin, der sich vorzugsweise gegenüber von der Führungsfläche des Hauptgehäusekörpers befindet und die Innenumfangsfläche des Deckel vorzugsweise axial so begrenzt, dass sich die Führungsfläche des Hauptgehäusekörpers weiter zur Antriebsseite des Hauptgehäusekörpers erstreckt als die Innenumfangsfläche, wird ein auf der Führungsfläche und der Innenumfangsfläche anliegendes Statorflanschelement mittels des Deckelvorsprungs bei am Gehäusekörper befestigten Deckel daran gehindert, in Richtung der antriebsseitigen Öffnung verschoben zu werden. Vorteilhafterweise ist die Führungsfläche axial mindestens doppelt so lang wie die kreisringsegmentförmige Innenumfangsfläche, da so sicher festgestellt werden kann, ob ein Statorflanschelement sich in einer in Richtung der antriebsseitigen Öffnung verschobenen Position befindet, in welcher die Befestigung des Deckels an dem Hauptgehäusekörper nicht erfolgen soll.In addition, the cover is preferably provided with an annular circumferential inner circumferential surface opposite the guide surface, which has the same distance radially from the longitudinal axis as the guide surface and is delimited axially on the inside by a radially inwardly extending projection of the cover, which is preferably located opposite the guide surface , The opposite, Circular segment-shaped inner circumferential surface, which has the same distance radially from the longitudinal axis as the guide surface, forms together with the guide surface a closed circular surface, which serves to receive the sealing flange of a complementary, circular stator flange element, which is preferably fluid-tight on such an annular surface with an O-ring rests to seal the cavity of the pump housing from the outside. Due to the described cover projection towards the longitudinal axis, which is preferably opposite from the guide surface of the main housing body and preferably limits the inner peripheral surface of the cover axially such that the guide surface of the main housing body extends further to the drive side of the main housing body than the inner peripheral surface, one on the guide surface and the inner circumferential surface of the stator flange element which is prevented from being displaced in the direction of the drive-side opening by means of the cover projection when the cover is attached to the housing body. Advantageously, the guide surface is axially at least twice as long as the inner circumferential surface in the form of an annular segment, since it can thus be reliably determined whether a stator flange element is in a position displaced in the direction of the drive-side opening, in which the cover should not be attached to the main housing body.

Eine vorteilhafte Weiterbildung sieht vor, dass die Führungsfläche axial außen von einem radialen Vorsprung des Hauptgehäusekörpers begrenzt ist. Ein solcher Vorsprung bewirkt, dass ein auf der Führungsfläche geführtes Statorflanschelement axial nicht aus dem Hauptgehäusekörper heraus geschoben werden kann, und stellt gleichzeitig einen Positionierungsanschlag dar, der die korrekte Einbauposition einer aus Rotor, Stator und Statorflanschelement bestehenden Baugruppe festlegt. Vorteilhafterweise ist die Führungsfläche des Weiteren von einem stufenartig nach innen vorstehenden Fixiervorsprung unterbrochen, der die Führungsfläche in einem pumpenseitigen Haltebereich und einen antriebsseitigen Führungsbereich unterteilt, wobei sich der Haltebereich zwischen dem Positionierungsanschlag und dem Fixiervorsprung nutförmig in Umfangsrichtung so erstreckt, dass der Dichtungsflansch des Statorflanschelements darin vorzugsweise formschlüssig passend eingelegt werden kann, um das Statorflanschelement axial sowohl in pumpenseitiger Richtung als auch in antriebsseitiger Richtung zu fixieren. Vorteilhafterweise fluchtet ein axial pumpenseitiger Rand des Fixiervorsprungs mit einem axial pumpenseitigen Rand des Deckelvorsprungs in einer zur Längsachse senkrechten Ebene. Ein in den Haltebereich der Führungsfläche eingebrachter Statorflanschelementkragen (Dichtungsflansch) wird so von dem Deckel und dem Hauptgehäusekörper gegen eine Verschiebung in die antriebsseitige Richtung des Pumpengehäuses gesichert.An advantageous development provides that the guide surface is delimited axially on the outside by a radial projection of the main housing body. Such a projection means that a stator flange element guided on the guide surface cannot be pushed axially out of the main housing body, and at the same time represents a positioning stop which determines the correct installation position of an assembly consisting of rotor, stator and stator flange element. Advantageously, the guide surface is further interrupted by a step-like inward projecting fixing projection which divides the guide surface into a pump-side holding area and a drive-side guide area, the holding area extending between the positioning stop and the fixing projection in a groove-like manner in the circumferential direction such that the sealing flange of the stator flange element therein can preferably be inserted in a form-fitting manner in order to fix the stator flange element axially both in the pump-side direction and in the drive-side direction. An axially pump-side edge of the fixing projection is advantageously aligned with an axially pump-side edge of the cover projection in a plane perpendicular to the longitudinal axis. A stator flange element collar (sealing flange) introduced into the holding area of the guide surface is thus secured against displacement in the drive-side direction of the pump housing by the cover and the main housing body.

Von Vorteil ist darüber hinaus, wenn eine Kontaktebene zwischen dem Deckel und dem Hauptgehäusekörper schräg zur Längsachse des Pumpengehäuses verläuft. Dies ermöglicht eine einfachere Produktion und Montage des Deckels und eine bessere Abdichtung zwischen Deckel und Hauptgehäusekörper aufgrund der Möglichkeit der Verwendung eines ebenen Dichtelements. Vorteilhafterweise weist der Hauptgehäusekörper eine zur Aufnahme eines ebenen Dichtelements vorgesehene Vertiefung auf, die ein Verrutschen oder Abfallen der Dichtung während der Deckelmontage verhindert.It is also advantageous if a contact plane between the cover and the main housing body extends obliquely to the longitudinal axis of the pump housing. This enables easier production and assembly of the cover and a better seal between the cover and the main housing body due to the possibility of using a flat sealing element. The main housing body advantageously has a recess which is provided for receiving a flat sealing element and prevents the seal from slipping or falling off during the cover assembly.

Von Vorteil ist zudem, dass der Hauptgehäusekörper wie beschrieben die axiale Verschiebbarkeit des Statorflanschelements in einer Richtung von der antriebsseitigen Öffnung weg begrenzt, wodurch ein axiales Herausfallen des Statorflanschelements aus dem Pumpengehäuse verhindert wird. Vorteilhafterweise ist zu diesem Zweck mindestens einer der bereits beschriebenen Positionierungs- bzw. Fixiervorsprüngen vorhanden.It is also advantageous that the main housing body, as described, limits the axial displaceability of the stator flange element in a direction away from the drive-side opening, thereby preventing the stator flange element from axially falling out of the pump housing. For this purpose, at least one of the positioning or fixing projections already described is advantageously present.

Die eingangs genannte Aufgabe ist auch durch eine Exzenterschneckenpumpe mit den Merkmalen des Patentanspruchs 8 gelöst.The object mentioned is also achieved by an eccentric screw pump with the features of claim 8.

Dadurch, dass das Statorflanschelement zwischen Stator und Pumpengehäuse so angeordnet ist, dass es im befestigten Zustand des Deckels ein Statorende in einer dazu komplementären Statoraufnahme des Anschlussstutzen fixiert, kann der Stator bei befestigtem Deckel nicht aus der Exzenterschneckenpumpe herausgenommen werden, d. h. der Deckel fixiert den Stator über das Statorflanschelement in seiner Einbauposition.Because the stator flange element is arranged between the stator and the pump housing in such a way that, when the cover is fastened, it fixes a stator end in a complementary stator receptacle of the connecting piece, the stator cannot be removed from the eccentric screw pump when the cover is fastened. H. the cover fixes the stator in its installation position via the stator flange element.

Besonders vorteilhaft ist, dass der Stator bei abgenommenem Deckel axial soweit aus dem Anschlussstutzen in Richtung des Pumpengehäuses verschiebbar ist, dass er sich aus der Statoraufnahme des Anschlussstutzens löst. Dies ermöglicht einen platzsparenden radialen Ausbau des Stators aus der Exzenterschneckenpumpe.It is particularly advantageous that the stator, with the cover removed, can be displaced axially from the connecting piece in the direction of the pump housing such that it detaches from the stator receptacle of the connecting piece. This enables space-saving radial removal of the stator from the eccentric screw pump.

Vorzugsweise bilden der Stator, der Rotor und das Statorflanschelement eine Baugruppe, die noch um ein am antriebsseitigen Rotorende befestigtes Kupplungselement ergänzt sein kann. Auch können der Stator, der Rotor, das Statorflanschelement, ein am antriebsseitigen Rotorende befestigtes Kupplungselement und ein sich am antriebsseitigen Ende des Kupplungselements anschließender pumpenseitiger Kardanwellenabschnitt eine Baugruppe bilden, wobei der pumpenseitige Kardanwellenabschnitt mit einem weiteren antriebsseitigen Kardanwellenabschnitt lösbar verbunden ist, der der erforderlichen axialen Verschiebungsstrecke der Baugruppe entspricht, um letztere aus der Exzenterschneckenpumpe herausnehmen zu können; danach sind der Hohlraum des Pumpengehäuses und die weiteren darin befindlichen Bauteile zur Wartung bzw. Montage und Demontage zugänglich. Die erforderliche drehfeste, lösbare Verbindung mit einem ausreichenden axialen Verschiebungsabstand kann statt in der Kardanwelle auch im Kupplungselement nach demselben Prinzip vorgesehen sein. Vorzugsweise ist das Statorflanschelement einstückig mit dem Stator ausgebildet.The stator, the rotor and the stator flange element preferably form an assembly which can also be supplemented by a coupling element fastened to the drive-side rotor end. The stator, the rotor, the The stator flange element, a coupling element fastened to the drive-side rotor end and a pump-side cardan shaft section adjoining the drive-side end of the coupling element form an assembly, the pump-side cardan shaft section being detachably connected to a further drive-side cardan shaft section which corresponds to the required axial displacement distance of the module, in order to remove the latter from the eccentric screw pump being able to take out; The cavity of the pump housing and the other components located therein are then accessible for maintenance or assembly and disassembly. The required non-rotatable, releasable connection with a sufficient axial displacement distance can also be provided in the coupling element instead of in the cardan shaft according to the same principle. The stator flange element is preferably formed in one piece with the stator.

Die Erfindung wird nachfolgend anhand schematischer Zeichnungen erläutert. Es zeigen:

Fig. 1
ein erfindungsgemäßes Pumpengehäuse in einer räumlichen Explosionsansicht,
Fig. 2
das zusammengebaute Pumpengehäuse aus Fig. 1 mit einem Statorflanschelement in seitlicher Ansicht,
Fig. 3
eine erfindungsgemäße Exzenterschneckenpumpe mit abmontiertem Deckel des Pumpengehäuses, und
Fig. 4
die Exzenterschneckenpumpe aus Fig. 3 mit herausgenommener Pumpenbaugruppe.
The invention is explained below using schematic drawings. Show it:
Fig. 1
an inventive pump housing in a spatial exploded view,
Fig. 2
the assembled pump housing Fig. 1 with a stator flange element in a side view,
Fig. 3
an eccentric screw pump according to the invention with the cover of the pump housing removed, and
Fig. 4
the eccentric screw pump Fig. 3 with the pump assembly removed.

Die Fig. 1 zeigt ein Pumpengehäuse 10 in einem Antriebsstrang einer Exzenterschneckenpumpe 100, das aus einem rohrförmigen Hauptgehäusekörper 12 und einem daran anbringbaren Deckel 14 sowie einer zwischen beiden angeordneten U-förmigen Dichtung 16 besteht. Das Pumpengehäuse 10 hat einen axial hindurch verlaufenden Hohlraum H, der sich zwischen zwei endseitigen Öffnungen P, A, d.h. zwischen einer pumpenseitigen Öffnung P und einer antriebsseitigen Öffnung A, erstreckt. Dabei ist die pumpenseitige Öffnung P von dem Hauptgehäusekörper 12 und dem daran abnehmbar befestigten Deckel 14 umschlossen. Eine Kontaktebene K zwischen dem Hauptgehäusekörper 12 und dem Deckel 14 verläuft schräg zu einer Längsachse L des Pumpengehäuses 10 (Fig. 2). Zur Befestigung des Deckels 14 an dem Hauptgehäusekörper 12 sind Deckelbohrungen 18 sowie dazu passende Hauptgehäusebohrungen 20 vorgesehen, in welche Schrauben 19 (Fig. 3) eingebracht werden.The Fig. 1 shows a pump housing 10 in a drive train of an eccentric screw pump 100, which consists of a tubular main housing body 12 and a cover 14 attachable thereon and a U-shaped seal 16 arranged between the two. The pump housing 10 has an axially extending cavity H, which extends between two end-side openings P, A, ie between a pump-side opening P and a drive-side opening A. The pump-side opening P is enclosed by the main housing body 12 and the cover 14 which is removably attached to it. A contact plane K between the main housing body 12 and the cover 14 extends obliquely to a longitudinal axis L of the pump housing 10 ( Fig. 2 ). To attach the cover 14 to the main housing body 12 are provided with cover bores 18 and matching main housing bores 20 into which screws 19 ( Fig. 3 ) are introduced.

Im Bereich der pumpenseitigen Öffnung P des Pumpengehäuses 10 weist der Hauptgehäusekörper 12 eine dem Deckel 14 gegenüberliegende, kreisringsegmentförmige axial und in Umfangsrichtung verlaufende Führungsfläche F auf, die sich nur in einem vom Deckel 14 überdeckten Bereich des Hauptgehäusekörpers 12 erstreckt. Dabei ist die Führungsfläche F axial außen von einem pumpenseitigen Vorsprung 22 des Hauptgehäusekörpers 12 begrenzt. In dem Ausführungsbeispiel aus Fig. 1 ist die Führungsfläche F von einem radial nach innen ragenden Fixiervorsprung 24 unterbrochen, dessen Zweck weiter unten beschrieben ist. Ein derartiger Fixiervorsprung 24 ist jedoch nicht erforderlich, sodass auch eine ununterbrochene Führungsfläche F vorhanden sein kann.In the area of the pump-side opening P of the pump housing 10, the main housing body 12 has an annular segment-shaped guide surface F which lies opposite the cover 14 and extends in the circumferential direction and extends only in an area of the main housing body 12 covered by the cover 14. The guide surface F is delimited axially on the outside by a pump-side projection 22 of the main housing body 12. In the embodiment Fig. 1 the guide surface F is interrupted by a radially inwardly projecting fixing projection 24, the purpose of which is described below. However, such a fixing projection 24 is not necessary, so that an uninterrupted guide surface F can also be present.

Der Deckel 14 weist eine der Führungsfläche F gegenüberliegende, kreisringsegmentförmige Innenumfangsfläche TF auf, die radial von der Längsachse L gleich weit wie die Führungsfläche F beabstandet ist und axial innen von einem antriebsseitigen Vorsprung 26 im Deckel 14 begrenzt ist.The cover 14 has an inner circumferential surface TF which is opposite the guide surface F and which is spaced radially from the longitudinal axis L by the same distance as the guide surface F and is axially delimited on the inside by a drive-side projection 26 in the cover 14.

Die Fig. 2 zeigt ein mit dem Pumpengehäuse 10 aus Fig. 1 auf der Führungsfläche F axial verschiebbar gekoppeltes Statorflanschelement 50, wobei das Statorflanschelement 50 nur dann verschiebbar ist, wenn der Deckel 14 abgenommen ist. Das Statorflanschelement 50 hat im Wesentlichen die Gestalt eines Hohlzylinders (Fig. 3), der an seinem einen, antriebsseitigen Ende einen radialen, als Dichtungsflansch ausgebildeten Führungskragen 52 und an seinem anderen, pumpenseitigen Ende einen radialen Statorflanschkragen 54 hat, wobei das Statorflanschelement 50 mit seinem Führungskragen 52 auf der Führungsfläche F aufliegt und der Statorflanschkragen 54 von der pumpenseitigen Öffnung P nach außen von dem Pumpengehäuse 10 beabstandet ist. Der am Hauptgehäusekörper 12 befestigte Deckel 14 verhindert eine Verschiebung des Statorflanschelements 50 in Richtung der antriebsseitigen Öffnung A mittels seines Vorsprungs 26. Bei abgenommenem Deckel 14 begrenzt der Hauptgehäusekörper 12 mit seinem Vorsprung 22 die axiale Verschiebbarkeit des Statorflanschelements 50 in der Gegenrichtung, indem der Statorflanschkragen 54 gegen den Vorsprung 22 stößt. Der Hauptgehäusekörper 12 wiederum kann die axiale Verschiebbarkeit des Statorflanschelements 50 in einer Richtung zur antriebsseitigen Öffnung A mittels des Fixiervorsprungs 24 begrenzen. Des Weiteren kann der Führungskragen 52 des Statorflanschelements 50 eine nicht gezeigte Fase aufweisen, die komplementär zu einer ebenfalls nicht gezeigten Fase des sich radial einwärts erstreckenden Vorsprungs 26 des Deckels 14 ist, so dass mit fortschreitender Annäherung des Deckels 14 an den Hauptgehäusekörper 12 bei deren Befestigung aneinander das dazwischen platzierte Statorflanschelement 50 axial in die der rotorseitigen Öffnung A des Pumpengehäuses 10 entgegengesetzte Richtung verschoben und gegen ein Zurückwandern gesichert wird.The Fig. 2 shows a with the pump housing 10 from Fig. 1 axially slidably coupled stator flange element 50 on the guide surface F, the stator flange element 50 being slidable only when the cover 14 is removed. The stator flange element 50 essentially has the shape of a hollow cylinder ( Fig. 3 ), which has a radial guide collar 52 designed as a sealing flange at its one drive-side end and a radial stator flange collar 54 at its other pump-side end, the stator flange element 50 resting with its guide collar 52 on the guide surface F and the stator flange collar 54 from the pump side Opening P is spaced outward from the pump housing 10. The cover 14 attached to the main housing body 12 prevents displacement of the stator flange element 50 in the direction of the drive-side opening A by means of its projection 26. When the cover 14 is removed, the main housing body 12 with its projection 22 limits the axial displacement of the stator flange element 50 in the opposite direction by the stator flange collar 54 bumps against the projection 22. The main housing body 12 in turn can limit the axial displaceability of the stator flange element 50 in a direction to the drive-side opening A by means of the fixing projection 24. Furthermore, the guide collar 52 of the stator flange element 50 can have a chamfer (not shown) have, which is complementary to a chamfer, also not shown, of the radially inwardly extending projection 26 of the cover 14, so that as the cover 14 progressively approaches the main housing body 12 when they are attached to one another, the stator flange element 50 placed therebetween axially into that of the rotor-side opening A the pump housing 10 is moved in the opposite direction and is secured against wandering back.

Die Fig. 3 und 4 zeigen exemplarisch einen Ausbauvorgang an einer Exzenterschneckenpumpe 100 mit einer Antriebseinheit 102, einer sich daran anschließenden zweiteiligen Kardanwelle mit einem antriebsseitigen Teil 104 und einem pumpenseitigen Teil 106, einem Kupplungselement 108, einem Rotor 110, einem den Rotor 110 umgebenden Stator 112 mit einem Statorende 112a, das in einen Anschlussstutzen 114 mit einer zum Statorende 112a komplementären Statoraufnahme 114a passt. Dabei ist das Statorflanschelement 50, das einstückig mit dem Stator 112 ausgebildet sein kann, zwischen dem Stator 112 und dem Pumpengehäuse 10 so angeordnet, dass es im befestigten Zustand des Deckels 14 das Statorende 112a in der dazu komplementären Statoraufnahme 114a des Anschlussstutzen 114 fixiert ist. Zu diesem Zweck ist die Pumpe 100 im Bereich der Antriebseinheit 102 und des Anschlussstutzens 114 ortsfest mit einer Basis B verbunden.The Fig. 3 and 4 show an example of a removal process on an eccentric screw pump 100 with a drive unit 102, an adjoining two-part propeller shaft with a drive-side part 104 and a pump-side part 106, a coupling element 108, a rotor 110, a stator 112 surrounding the rotor 110 with a stator end 112a, that fits into a connecting piece 114 with a stator receptacle 114a complementary to the stator end 112a. Here, the stator flange element 50, which can be formed in one piece with the stator 112, is arranged between the stator 112 and the pump housing 10 in such a way that when the cover 14 is fastened, the stator end 112a is fixed in the complementary stator receptacle 114a of the connecting piece 114. For this purpose, the pump 100 is fixedly connected to a base B in the area of the drive unit 102 and the connecting piece 114.

Die Fig. 3 zeigt insbesondere einen Zustand der Exzenterschneckenpumpe 100, in dem der Deckel 14 des Pumpengehäuses 10 bereits abgenommen, die drehfeste Verbindung (nicht dargestellt) beider Kardanwellentelle 104, 106 durch die Deckelöffnung im Hauptgehäusekörper 12 getrennt und die Baugruppe bestehend aus Rotor 110, Stator 112, Statorflansch 50, Kupplungselement 108 und pumpenseitigem Teil der Kardanwelle 106 in Richtung der Antriebsseite bereits um eine Strecke x1+x2 verschoben worden ist, wobei x1 die axiale Tiefe der Statoraufnahme 114a im Anschlussstutzen 114 und x2 ein minimaler Rangierabstand zum Anschlussstutzen 114 ist. In diesem Zustand ist auch noch ein zum antriebsseitigen Teil 104 der Kardanwelle vorbestimmter Abstand x3 vorhanden. Der radiale Führungskragen 52 des Statorflanschelements 50 wird bei diesem Verschieben erst über den Fixiervorsprung 24 gehoben und dann auf der Führungsfläche F weiter in Richtung der antriebsseitigen Öffnung A verschoben. In einer alternativen Ausführungsform ist kein Fixiervorsprung 24 vorgesehen und die Führungsfläche F ununterbrochen, so dass der Führungskragen 52 des Statorflanschelements 50 ohne Anheben verschoben werden kann. Die Führungsfläche sollte eine Mindestlänge von x1+x2 haben und auf jeden Fall länger als x1 sein, um ein Lösen des Statorendes 112a aus dem Anschlussstutzen 114 zu ermöglichen.The Fig. 3 shows in particular a state of the eccentric screw pump 100, in which the cover 14 of the pump housing 10 has already been removed, the non-rotatable connection (not shown) of both cardan shaft 104, 106 separated by the cover opening in the main housing body 12 and the assembly consisting of rotor 110, stator 112, stator flange 50, coupling element 108 and part of the propeller shaft 106 on the pump side has already been displaced in the direction of the drive side by a distance x 1 + x 2 , where x 1 is the axial depth of the stator receptacle 114a in the connecting piece 114 and x 2 is a minimal shunting distance to the connecting piece 114. In this state there is also a predetermined distance x 3 from the drive-side part 104 of the propeller shaft. During this displacement, the radial guide collar 52 of the stator flange element 50 is first lifted over the fixing projection 24 and then moved further on the guide surface F in the direction of the opening A on the drive side. In an alternative embodiment, no fixing projection 24 is provided and the guide surface F is uninterrupted, so that the guide collar 52 of the stator flange element 50 can be moved without lifting. The guide surface should have a minimum length of x 1 + x 2 and in any case be longer than x 1 in order to enable the stator end 112a to be released from the connecting piece 114.

Die Baugruppe wird anschließend, wie in Fig. 4 dargestellt, aus der Exzenterschneckenpumpe 100 herausgehoben. Dies ist nur möglich, weil das Statorflanschelement 50 und damit auch der Stator 112 bei abgenommenem Deckel 14 axial soweit aus dem Anschlussstutzen 114 in Richtung auf das Pumpengehäuse 10 verschiebbar ist, dass er sich aus der Statoraufnahme 114a des Anschlussstutzens 114 lösen kann. Selbstverständlich kann die auf diese Weise herausnehmbare Baugruppe auch nur aus Stator 112, Rotor 110 und Statorflanschelement 50 gebildet sein, da eine lösbare, drehfeste Verbindung auch mittels eines zweiteiligen (nicht dargestellt) Kupplungselements 108 möglich ist.The assembly is then, as in Fig. 4 shown, lifted out of the eccentric screw pump 100. This is only possible because the stator flange element 50 and thus also the stator 112 with the cover 14 removed can be displaced axially from the connecting piece 114 in the direction of the pump housing 10 such that it can detach from the stator receptacle 114a of the connecting piece 114. Of course, the assembly which can be removed in this way can also be formed only from stator 112, rotor 110 and stator flange element 50, since a releasable, rotationally fixed connection is also possible by means of a two-part coupling element 108 (not shown).

Claims (9)

  1. A pump housing (10) for an eccentric screw pump (100), with a longitudinal axis (L) and an axially running hollow space (H) formed between a drive-side opening (A) and a pump-side opening (P), wherein the pump-side opening (P) is surrounded by a main housing body (12) and a lid (14) fastened removably thereto,
    wherein the main housing body (12) comprises a circular segment-shaped axial guide surface (F) lying opposite the lid (14),
    characterised in that a stator flange element (50) which can be coupled with the pump housing (10) is axially displaceable on the guide surface (F) and the lid (14) fastened to the main housing body (12) prevents a displacement of the stator flange element (50) in the direction of the drive-side opening (A).
  2. The pump housing according to claim 1,
    characterised in that the axial guide surface (F) extends only in a region of the main housing body (12) that is covered by the lid (14).
  3. The pump housing according to claim 1 or 2,
    characterised in that the lid (14) comprises a circular segment-shaped inner circumferential surface (TF) lying opposite the guide surface (F), which radially has the same distance as the guide surface (F) from the longitudinal axis (L) and is limited axially inwards by a projection (26) of the lid (14) extending radially inwards.
  4. The pump housing according to any one of the preceding claims,
    characterised in that the guide surface (F) is limited axially outwards by a projection (22) of the main housing body (12).
  5. The pump housing according to any one of the preceding claims,
    characterised in that a contact plane (K) between the lid (14) and the main housing body (12) runs obliquely with respect to the longitudinal axis (L) of the pump housing (10).
  6. The pump housing according to any one of the preceding claims,
    characterised in that the main housing body (12) limits the axial displaceability of the stator flange element (50) in a direction away from the drive-side opening (A).
  7. An eccentric screw pump (100) with a fixed pump housing (10) according to any one of claims 1 to 6, a rotor (110) extending out of the pump-side opening (P) of the pump housing (10), a stator (112) with a stator flange element (50) surrounding the rotor and a connecting piece (114) for the stator (112), arranged fixedly at an end of the stator (112) facing away from the pump housing (10),
    characterised in that the stator flange element (50) is arranged between the stator (112) and the pump housing (10), in such a way that, in the fastened state of the lid (14), it fixes a stator end (112a) and a stator seating (114a) of the connecting piece (114) complementary to said stator end.
  8. The eccentric screw pump according to claim 7,
    characterised in that the stator (112), when the lid (14) is removed, can be displaced axially so far out of the connecting piece (114) in the direction of the pump housing (10) that it becomes detached from the stator seating (114a) of the connecting piece (114).
  9. The eccentric screw pump according to claim 8,
    characterised in that the stator (112), the rotor (110) and the stator flange element (50) form an assembly.
EP16745407.3A 2015-06-12 2016-06-09 Pump housing for an eccentric screw pump, and eccentric screw pump equipped therewith Active EP3308025B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015007521.7A DE102015007521B4 (en) 2015-06-12 2015-06-12 Pump housing for an eccentric screw pump and eccentric screw pump equipped therewith
PCT/DE2016/000240 WO2016198037A1 (en) 2015-06-12 2016-06-09 Pump housing for an eccentric screw pump, and eccentric screw pump equipped therewith

Publications (2)

Publication Number Publication Date
EP3308025A1 EP3308025A1 (en) 2018-04-18
EP3308025B1 true EP3308025B1 (en) 2020-01-29

Family

ID=56557427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16745407.3A Active EP3308025B1 (en) 2015-06-12 2016-06-09 Pump housing for an eccentric screw pump, and eccentric screw pump equipped therewith

Country Status (6)

Country Link
US (1) US10767646B2 (en)
EP (1) EP3308025B1 (en)
CN (1) CN107743548B (en)
BR (1) BR112017025685B1 (en)
DE (1) DE102015007521B4 (en)
WO (1) WO2016198037A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018110917A1 (en) * 2018-05-07 2019-11-07 Seepex Gmbh Cavity Pump
RU2758408C2 (en) * 2019-12-25 2021-10-28 Образовательный Фонд "Талант и успех" Single-screw eccentric dosing pump
DE102021111925A1 (en) 2021-05-07 2022-11-10 Seepex Gmbh progressing cavity pump

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT956647B (en) * 1971-06-24 1973-10-10 Kramer H PARTICULARLY PUMP TRANSPORT DEVICE
NZ220313A (en) * 1986-07-29 1988-06-30 Canadian Ind Progressing cavity pump with fusible coupling between drive and rotor
US5688114A (en) 1996-03-20 1997-11-18 Robbins & Myers, Inc. Progressing cavity pumps with split extension tubes
DE102008021919A1 (en) * 2008-05-02 2009-11-05 Seepex Gmbh Eccentric screw pump, has spacer ring arranged between stator and connection piece, where spacer ring is detachable for disassembly of stator and attached under interconnection of flat seals to stator and/or to connection piece
GB2455597B (en) * 2008-07-28 2009-12-09 Mono Pumps Ltd Pump
JP5821058B2 (en) * 2010-12-27 2015-11-24 兵神装備株式会社 Uniaxial eccentric screw pump
EP3112682B1 (en) * 2014-05-12 2021-07-07 Hugo Vogelsang Maschinenbau GmbH Eccentric screw pump with assembly through the hollow rotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US10767646B2 (en) 2020-09-08
DE102015007521B4 (en) 2017-01-12
CN107743548B (en) 2019-05-17
WO2016198037A1 (en) 2016-12-15
CN107743548A (en) 2018-02-27
BR112017025685A2 (en) 2018-08-07
US20180252211A1 (en) 2018-09-06
EP3308025A1 (en) 2018-04-18
BR112017025685B1 (en) 2022-10-25
DE102015007521A1 (en) 2016-12-15

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