EP0987438A1 - Security against rotation for stators of eccentric screw pumps - Google Patents
Security against rotation for stators of eccentric screw pumps Download PDFInfo
- Publication number
- EP0987438A1 EP0987438A1 EP99117854A EP99117854A EP0987438A1 EP 0987438 A1 EP0987438 A1 EP 0987438A1 EP 99117854 A EP99117854 A EP 99117854A EP 99117854 A EP99117854 A EP 99117854A EP 0987438 A1 EP0987438 A1 EP 0987438A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pin
- rotation device
- stator
- jacket
- elastomer
- 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.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 10
- 239000000806 elastomer Substances 0.000 claims abstract description 9
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
Definitions
- the invention relates to an anti-rotation device for Elastomer stators of eccentric screw pumps, whereby the metallic, the elastomer lining enclosing jacket of the stator with at least one is provided essentially radially projecting pin, on fixed parts, especially parallel to the stator arranged anchor bolts of the eccentric screw pump for Stop can come.
- Stator jacket with a threaded hole Element preferably a threaded nut, into that with a corresponding external thread provided pin is screwed. So that's the Pin releasable or at any time attachable or even replaceable. According to that can also the stator initially with a tight fitting Protective film are provided, which is also the threaded hole can cover up. To the under these conditions To be able to attach cones, the film is in the area Simply pierce the protective film so that the To be able to produce screw fastening.
- the pin is also expediently made elastic deformable cover, preferably in the form of a tight provided hose section to the To improve the stop behavior of the pin. It is it is very beneficial if the spigot has a length away, but at least over part of its length the screw thread is provided in such a way that the The hose section to a certain extent on the spigot can be screwed on so that the hose section not only due to its elastic inherent tension, but also also at least slightly positive hold.
- the proposal according to the invention is suitable in advantageous for such stators, whose over their length provided with uniform wall thickness Coats of the spiral of the mold cavity (cavity inside the stator to accommodate the rotor) are shaped accordingly.
- Coats of the spiral of the mold cavity cavity inside the stator to accommodate the rotor
- it will Element with internal thread in a through the Coil-induced deepening of the stator sheath arranged so that the element the outer contour of the Stator not towered over or only slightly.
- the pin can - as already mentioned - the Pierce the protective film in the area of the threaded hole become.
- the steel jacket 1 of the stator encloses an adhered lining 2 made of rubber od. Like .. Your inner surface limits one Pump cavity 3, which is coiled several times and one also coiled rotor, not shown records.
- the longitudinal central axis is designated 4.
- stator When installed, the stator is between two End rings of the pump frame clamped by distributed over the circumference of the stator, parallel to the stator extending anchors are connected, one of which at 5 is indicated.
- an anti-rotation device is provided attached in the form of an outside on the jacket 1, about radially projecting pin 7 made of steel.
- the pin 7 is along its length with a Provide thread and by screwing into an outside nut 8 welded to jacket 1 releasable or optionally attached to the stator afterwards.
- the jacket 1 is practical over its length same wall thickness and the winding of the Pump cavity 3 coiled accordingly. For this Basically, it is possible to use the mother 8 in one To fix spiral-related recess 9.
- the pin 7 with the thread mentioned has the advantage that it can be screwed on. In addition, with help the thread of the hose 11 attached. A relaxation the pin 7 is excluded because its lower end against the outer surface of the jacket 1 by tightening can be countered to a certain extent.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Verdrehsicherung für Elastomerstatoren von Exzenterschneckenpumpen, wobei der metallische, die Elastomerauskleidung umschliessende Mantel des Stators mit einem zumindest im wesentlichen radial abstehenden Zapfen versehen ist, der an festen Teilen, insb. an parallel zum Stator angeordneten Spannankern der Exzenterschneckenpumpe zum Anschlag kommen kann.The invention relates to an anti-rotation device for Elastomer stators of eccentric screw pumps, whereby the metallic, the elastomer lining enclosing jacket of the stator with at least one is provided essentially radially projecting pin, on fixed parts, especially parallel to the stator arranged anchor bolts of the eccentric screw pump for Stop can come.
Bei den bekannten Verdrehsicherungen dieser Art sind die Zapfen durch Verschweissen mit dem Mantel des Stators verbunden. Diese unlösbare Verbindung des Zapfens setzt die Anbringung des Zapfens zu einem bestimmten Zeitpunkt der Statorfertigung voraus, und es es nicht möglich, den Zapfen auszuwechseln oder ihn z.B. erst dann anzubringen, wenn der Statormantel mit einer Schutzfolie z.B. in Form einer Schrumpffolie versehen ist.In the known anti-rotation devices of this type the cones by welding to the jacket of the Stator connected. This inseparable connection of the Tenon attaches the tenon to one certain time of stator manufacture ahead, and it it is not possible to replace the pin or it e.g. only to be attached when the stator casing with a protective film e.g. in the form of a shrink film is provided.
Aufgrund der Erfindung sollen diese Nachteile beseitigt werden. So soll z.B. erreicht werden, dass der Statormantel nach seiner Herstellung zunächst mit einer Schutzfolie umgeben und erst dann zu einem beliebigen Zeitpunkt mit dem der Verdrehsicherung dienenden Zapfen verbunden werden kann.These disadvantages are to be eliminated on the basis of the invention become. For example, be achieved that the Stator sheath after its manufacture with one Surround protective film and only then to any Time with the pin serving to prevent rotation can be connected.
Zur Lösung dieser Aufgabe ist erfindungsgemäss der Statormantel mit einem ein Gewindeloch aufweisenden Element, vorzugsweise einer Gewindemutter, versehen, in das der mit einem entsprechenden Aussengewinde versehene Zapfen einschraubbar ist. Damit ist der Zapfen lösbar bzw. zu einem beliebigen Zeitpunkt anbringbar bzw. sogar auswechselbar. Damgemäss kann auch der Stator zunächst mit einer eng anliegenden Schutzfolie versehen werden, die auch das Gewindeloch überdecken kann. Um unter diesen Voraussetzungen den Zapfen anbringen zu können, wird die Folie im Bereich der Schutzfolie einfach durchstossen, um so die Schraubbefestigung herstellen zu können.According to the invention, to achieve this object Stator jacket with a threaded hole Element, preferably a threaded nut, into that with a corresponding external thread provided pin is screwed. So that's the Pin releasable or at any time attachable or even replaceable. According to that can also the stator initially with a tight fitting Protective film are provided, which is also the threaded hole can cover up. To the under these conditions To be able to attach cones, the film is in the area Simply pierce the protective film so that the To be able to produce screw fastening.
Zweckmäsigerweise wird zudem der Zapfen mit elatisch verformbaren Überzug, vorzugsweise in Form eines stramm aufgezogenen Schlauchabschnittes versehen, um das Anschlagverhalten des Zapfens zu verbessern. Dabei ist es sehr vorteilhaft, wenn der Zapfen über eine Länge hinweg, zumindest aber über einen Teil seiner Länge mit dem Schraubgewinde versehen ist in der Weise, dass der Schlauchabschnitt gewissermassen auf den Zapfen aufgeschraubt werden kann, um so den Schlauchabschnitt nicht nur durch seine elastische Eigenspannung, sondern auch noch zumindest geringfügig formschlüssig zu halten.The pin is also expediently made elastic deformable cover, preferably in the form of a tight provided hose section to the To improve the stop behavior of the pin. It is it is very beneficial if the spigot has a length away, but at least over part of its length the screw thread is provided in such a way that the The hose section to a certain extent on the spigot can be screwed on so that the hose section not only due to its elastic inherent tension, but also also at least slightly positive hold.
Der erfindungsgemässe Vorschlag eignet sich in vorteilhafter Weise für solche Statoren, deren über ihre Länge mit gleichmässiger Wandstärke versehene Mäntel der Wendelung des Formenhohlraumes ( Hohlraum innerhalb des Stator zur Aufnahme des Rotors ) entprechend geformt sind. In diesem Falle wird das das Innengewinde aufweisende Element in einer durch die Wendelung bedingten Vertiefung des Statormantels angeordnet, sodass das Element die Aussenkotur des Stators nicht oder nur geringfügig überragt. Zur Anbringung des Zapfens kann - wie bereits erwähnt - die Schutzfolie im Bereich des Gewindeloches durchstossen werden.The proposal according to the invention is suitable in advantageous for such stators, whose over their length provided with uniform wall thickness Coats of the spiral of the mold cavity (cavity inside the stator to accommodate the rotor) are shaped accordingly. In this case it will Element with internal thread in a through the Coil-induced deepening of the stator sheath arranged so that the element the outer contour of the Stator not towered over or only slightly. For Attaching the pin can - as already mentioned - the Pierce the protective film in the area of the threaded hole become.
Weitere Einzelheiten der Erfindung werden anhand der
Zeichnung erläutert, in der ein Ausführungsbeispiel der
Erfindung dargestellt ist. Es zeigen :
Der aus Stahl bestehende Mantel 1 des Stators
umschliesst eine angehaftete Auskleidung 2 aus Gummi
od. dgl.. Ihre Innenfläche begrenzt einen
Pumpenhohlraum 3, der mehrfach gewendelt ist und einen
ebenfalls gewendelten, nicht dargestellten Rotor
aufnimmt. Die Längsmittelachse ist mit 4 bezeichnet.The
Im eingebauten Zustand ist der Stator zwischen zwei
Endringen des Pumpengestells eingespannt, die durch
über den Statorumfang verteilte, parallel zum Stator
verlaufende Anker verbunden sind, von denen einer bei 5
angedeutet ist. Um ungewollte Verdrehungen des Stators
um die Längsmittelachse 4 im Sinne des Pfeiles 6
auszuschliessen, ist eine Verdrehsicherung vorgesehen
in Form eines aussen am Mantel 1 befestigten, etwa
radial abstehenden Zapfens 7 aus Stahl.When installed, the stator is between two
End rings of the pump frame clamped by
distributed over the circumference of the stator, parallel to the stator
extending anchors are connected, one of which at 5
is indicated. For unwanted twists of the stator
about the longitudinal
Der Zapfen 7 ist über seine Länge hinweg mit einem
Gewinde versehen und durch Einschrauben in eine aussen
am Mantel 1 festgeschweisste Mutter 8 lösbar bzw.
wahlweise nachträglich am Stator befestigt.The
Der Mantel 1 ist über seine Länge hinweg von praktisch
gleicher Wandstärke und der Wendelung des
Pumpenhohlraumes 3 entsprechend gewendelt. Aus diesem
Grunde ist es möglich, die Mutter 8 in einer durch die
Wendelung bedingten Vertiefung 9 zu befestigen.The
Auf das freie, oben überstehende, mit dem Gewinde
versehene Ende des Zapfens 7 ist ein innen mit
Vorsprüngen, insb. Längsrippen 10 versehener Schlauch
11 aus einem Thermoplast oder Elastomer z.B. PVC
gewissermassen unter Verformung der Längsrippen 10
aufgeschraubt und so ausreichend sicher befestigt.
Dieser Schlauch dient u.a. der Stossdämpfung.On the free, protruding above, with the thread
provided end of the
Aufgrund der Schraubbefestigung des Zapfens 7 kann
dieser nachträglich, also nach Fertigtellung des
Statorkörpers angebracht werden. Dies ist auch dann
möglich, wenn der Stator zum Zwecke der Kennzeichnung
und/oder des Schutzes mit einer aufgeschrumpften Folie,
die bei 12 angedeutet ist, versehen worden ist. Dabei
kann die Folie bei 12 das Loch der Mutter 8 überdecken.
Soll unter diesen Voraussetzungen der Zapfen 7
angebracht werden, so wird der überdeckende Teil der
Folie bei 12 einfach mit dem Zapfen 7 durchstossen, um
so das Schraubloch der Mutter 8 freizulegen.Due to the screw attachment of the
Der Zapfen 7 mit dem erwähnten Gewinde hat den Vorteil,
dass er angeschraubt werden kann. Zudem wird mit Hilfe
des Gewindes der Schlauch 11 befestigt. Eine Lockerung
des Zapfens 7 ist ausgeschlossen, da sein unteres Ende
gegen die Aussenfläche des Mantels 1 durch Anziehen
gewissermassen gekontert werden kann.The
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29816742U | 1998-09-18 | ||
DE29816742U DE29816742U1 (en) | 1998-09-18 | 1998-09-18 | Anti-rotation device for stators of eccentric screw pumps |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0987438A1 true EP0987438A1 (en) | 2000-03-22 |
EP0987438B1 EP0987438B1 (en) | 2001-03-14 |
Family
ID=8062809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99117854A Expired - Lifetime EP0987438B1 (en) | 1998-09-18 | 1999-09-11 | Security against rotation for stators of eccentric screw pumps |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0987438B1 (en) |
AT (1) | ATE199764T1 (en) |
DE (2) | DE29816742U1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202010016196U1 (en) | 2010-12-06 | 2011-03-17 | Kunststofftechnik Rodenberg Gmbh | twist |
DE202016101870U1 (en) | 2016-04-08 | 2016-04-26 | Wilhelm Kächele GmbH | Stator for eccentric screw machine |
DE202018100587U1 (en) | 2018-02-02 | 2018-02-15 | Wilhelm Kächele GmbH | Stator for eccentric screw machine |
DE102019005366A1 (en) * | 2019-07-31 | 2021-02-04 | Pumpenfabrik Wangen Gmbh | Eccentric screw pump |
DE102019005367A1 (en) * | 2019-07-31 | 2021-02-04 | Pumpenfabrik Wangen Gmbh | Method for manufacturing a stator component for an eccentric screw pump |
EA039576B1 (en) * | 2020-12-03 | 2022-02-11 | Борис Иванович Уваров | Stator of a single-screw gerotor pump |
RU2787624C2 (en) * | 2018-02-02 | 2023-01-11 | Вильхельм Кехеле Гмбх | Stator for single-screw machine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202014103665U1 (en) | 2014-08-06 | 2015-08-10 | Knauf Pft Gmbh & Co. Kg | Stator of an eccentric screw pump for conveying a flowable conveying mass, in particular a building material mixture such as mortar |
DE202016105789U1 (en) | 2016-10-17 | 2018-01-18 | Bogdan Kropmaier | Stator for an eccentric screw pump with anti-rotation device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH383782A (en) * | 1959-10-13 | 1964-10-31 | Netzsch Maschinenfabrik | Screw pump |
FR2126864A5 (en) * | 1971-02-12 | 1972-10-06 | Zyklos Metallbau Xg |
-
1998
- 1998-09-18 DE DE29816742U patent/DE29816742U1/en not_active Expired - Lifetime
-
1999
- 1999-09-11 AT AT99117854T patent/ATE199764T1/en active
- 1999-09-11 EP EP99117854A patent/EP0987438B1/en not_active Expired - Lifetime
- 1999-09-11 DE DE59900057T patent/DE59900057D1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH383782A (en) * | 1959-10-13 | 1964-10-31 | Netzsch Maschinenfabrik | Screw pump |
FR2126864A5 (en) * | 1971-02-12 | 1972-10-06 | Zyklos Metallbau Xg |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202010016196U1 (en) | 2010-12-06 | 2011-03-17 | Kunststofftechnik Rodenberg Gmbh | twist |
DE202016101870U1 (en) | 2016-04-08 | 2016-04-26 | Wilhelm Kächele GmbH | Stator for eccentric screw machine |
DE202016104173U1 (en) | 2016-04-08 | 2016-08-25 | Wilhelm Kächele GmbH | Stator for eccentric screw machine |
DE202018100587U1 (en) | 2018-02-02 | 2018-02-15 | Wilhelm Kächele GmbH | Stator for eccentric screw machine |
WO2019149656A1 (en) | 2018-02-02 | 2019-08-08 | Wilhelm Kächele GmbH | Stator for eccentric screw machine |
CN111670291A (en) * | 2018-02-02 | 2020-09-15 | 威廉凯彻尔有限责任公司 | Stator for eccentric screw machine |
RU2787624C2 (en) * | 2018-02-02 | 2023-01-11 | Вильхельм Кехеле Гмбх | Stator for single-screw machine |
DE102019005366A1 (en) * | 2019-07-31 | 2021-02-04 | Pumpenfabrik Wangen Gmbh | Eccentric screw pump |
DE102019005367A1 (en) * | 2019-07-31 | 2021-02-04 | Pumpenfabrik Wangen Gmbh | Method for manufacturing a stator component for an eccentric screw pump |
DE102019005367B4 (en) | 2019-07-31 | 2023-01-19 | Pumpenfabrik Wangen Gmbh | Method for producing a stator component for an eccentric screw pump, stator component and eccentric screw pump |
EA039576B1 (en) * | 2020-12-03 | 2022-02-11 | Борис Иванович Уваров | Stator of a single-screw gerotor pump |
Also Published As
Publication number | Publication date |
---|---|
DE29816742U1 (en) | 1998-11-26 |
DE59900057D1 (en) | 2001-04-19 |
ATE199764T1 (en) | 2001-03-15 |
EP0987438B1 (en) | 2001-03-14 |
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