EP1296062B1 - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
- Publication number
- EP1296062B1 EP1296062B1 EP02020615A EP02020615A EP1296062B1 EP 1296062 B1 EP1296062 B1 EP 1296062B1 EP 02020615 A EP02020615 A EP 02020615A EP 02020615 A EP02020615 A EP 02020615A EP 1296062 B1 EP1296062 B1 EP 1296062B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- impeller
- thread
- centrifugal pump
- threaded ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/622—Adjusting the clearances between rotary and stationary parts
Definitions
- the invention relates to a centrifugal pump according to the preamble of claim 1.
- the built-in adjustment means with which the sealing gap width between the pump impeller and the front wall portion of the pump housing after a certain period of operation of the centrifugal pump for wear reasons, must be readjusted to raise the efficiency of the centrifugal pump again, consists of a spacer.
- This spacer is seated on the pump shaft and is located on the one hand at the axial stop and on the other hand on the rear wall of the pump impeller. In this way, d. H. with the help of the thickness of the spacer, the axial position of the pump impeller on the pump shaft and thus the aforementioned sealing gap width is fixed.
- the sealing gap width has become too large, essentially due to wear on the free axial blade sides of the impeller, because the impeller has no front cover plate, a cumbersome and time-consuming disassembly and reassembly of the impeller is required, the pump housing must be opened very wide to replace the aforementioned spacer against a thicker or to put another spacer on the pump shaft. In both cases, the increase in thickness of the respective spacer corresponds to the wear dimension.
- the object of the invention is to improve a centrifugal pump of the introductory type such that the sealing gap width between the front of the pump impeller and the opposite side of this wall portion of the pump housing in a simple and fast way to wear on the impeller front and / or Saugmundwand Scheme of the pump housing again is adjustable to the original value.
- the mentioned sealing gap width can be quickly and easily adjusted to its original width again. It only needs the pressure piece, which is pressed in a conventional manner by means of the force of a screw which is screwed axially into the end of the pump shaft, against the front of the hub of the pump impeller, to be removed by loosening the screw. Thereafter, the threaded ring used instead of the aforementioned spacer is rotated, whereby the pump impeller to the front, ie adjusted to the central intake of the pump. As a result, the sealing gap width between the blades or the front cover disk of the pump impeller and the wall region of the pump housing opposing the inside of these blades or cover disk decreases again.
- the pump impeller does not need to be disassembled from the pump shaft, since the threaded ring to be adjusted from the intake of the pump housing after removal of only said pressure piece is readily accessible.
- the proposed solution is particularly suitable for sewage pumps, namely for those who have a central and freely accessible intake.
- the solution according to the invention is particularly advantageous when a cutting unit is provided in the central intake area, which serves to comminute larger solids in the pumped medium.
- a cutting unit in addition to a standing, annular cutting plate on a central rotating blade part, which is fixed instead of the aforementioned pressure piece on the pump shaft and also takes over the function of the pressure piece.
- the pump impeller is subject to increased wear due to the solids in the fluid, so that the aforementioned sealing gap increases faster. It is therefore necessary to readjust the sealing gap in shorter time intervals.
- the time gain in the new setting of the sealing gap width due to the inventive solution makes particularly advantageous.
- the thread of the threaded ring is designed as an external thread and the thread in the front hub region of the pump impeller as an internal thread. This results in a simple design of the threaded ring. Furthermore, it is advantageous that the two threads are provided as a fine thread, whereby a very accurate adjustment of the sealing gap width between impeller and pump housing is possible.
- the threaded ring is secured by means of a pressure body in its axial position, wherein the pressure body presses the threaded ring against the axial stop of the pump shaft and is itself bolted to the end of the pump shaft.
- the pressure body may further be formed as a cutting means of a provided in the intake of the centrifugal pump cutting unit.
- the single drawing shows a single-stage, generally designated 1 centrifugal pump whose housing 2 is fixed by means of a clamping ring 3 to a drive motor 4 partially shown for the centrifugal pump.
- a pump impeller 6 rotatably, but arranged axially displaceable.
- the pump impeller has a central hub 7 and a rear cover plate 8 with the usual blades 9.
- the centrifugal pump 1 is a centrally aspirating pump, for which reason the pump housing 2 is provided with a central suction region 10. If the centrifugal pump is advantageously used as a sewage pump, the pump housing 2 is provided with a plurality of support legs 11, with which the centrifugal pump (not shown) is supported on a support surface.
- the pump impeller 6 has in the case shown no front cover plate, so that its blades 9 directly opposite the front wall portion 2 a of the pump housing 2. Between the blades 9 and the front wall area 2a there is a sealing gap 12 whose width is set so that the conditional by this gap efficiency loss of the centrifugal pump 1 is as low as possible.
- the pump shaft 5 is provided with an axial stop 13, which is formed in the case shown by a stepped end portion 14 of the pump shaft. Loosely seated on this section 14 is a threaded ring 15 which is thus freely rotatable and freely displaceable on the section 14.
- the threaded ring 15 has in the case shown, an external thread 16 which engages in an internal thread 17 which is provided in a front recess 18 of the hub 7 of the pump impeller 6.
- the two threads 16 and 17 are formed as a fine thread, so that the pump impeller 6 can be axially adjusted very accurately, in turn, to adjust the width of the sealing gap 12 very accurately.
- a pressure body 20 On the front end portion 14 of the pump shaft 5 sits a pressure body 20 which is pressed by means of an axially engaging in the section 14 screw 21 in the case shown against the pump impeller 6.
- the pressure body 20 thus initiates its pressure force via the pump impeller 6 and via the two mentioned threads 16 and 17 into the threaded ring 15, which in turn presses against the axial stop 13. Since the pump impeller rotatably seated on the pump shaft 5 in the usual manner, the impeller 6 and the threaded ring 15 are fixed positionally secure on the pump shaft 5, when the pressure body 20 is tightened by means of the screw 21.
- the pressure body can also be designed so that it presses against the threaded ring 15, which in turn is then pressed against the axial stop 13 of the pump shaft and thus also locked in place. Due to the rotationally fixed mounting of the pump impeller 6 on the pump shaft 5, the pump impeller can not be adjusted in this case.
- the pressure body 20 may also be formed as a cutting means of a arranged in the intake region 10 of the centrifugal pump 1 cutting unit for crushing solid fractions of the funded by the centrifugal pump, loaded with solids conveying medium.
- the pressure body is provided with at least one cutting tooth 22 and serves as a rotating cutting means.
- the rotating pressure body cooperates with a stationary, annular cutting plate 23, which is arranged rotationally fixed on the pump housing 2 and has at least one counter-cutting tooth 24.
- the axial stop 13 may also proceed so that the pump shaft is provided with a radially projecting annular collar, whose axial shoulder serves as a stop surface for the threaded ring 15.
- the threaded ring 15 may also be provided with an internal thread, which then engages in a corresponding external thread of the hub 7 of the pump impeller 6.
- the threaded ring is provided with an outer, axially extending collar, which is provided on its inner ring side with the internal thread.
- the hub 7 has for this purpose an axially projecting ring member which is provided with the external thread.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Die Erfindung geht aus von einer Kreiselpumpe gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a centrifugal pump according to the preamble of claim 1.
Eine derartige Kreiselpumpe ist in der Praxis bekannt. Die darin eingebaute Einstelleinrichtung, mit welcher die Dichtspaltweite zwischen dem Pumpenlaufrad und dem vorderen Wandbereich des Pumpengehäuses nach einer gewissen Betriebszeit der Kreiselpumpe aus Verschleißgründen wieder neu eingestellt werden muss, um den Wirkungsgrad der Kreiselpumpe wieder anzuheben, besteht aus einer Distanzscheibe. Diese Distanzscheibe sitzt auf der Pumpenwelle und liegt einerseits an deren axialem Anschlag und andererseits an der Rückwand des Pumpenlaufrades an. Auf diese Weise, d. h. mit Hilfe der Dicke der Distanzscheibe, ist die axiale Lage des Pumpenlaufrades auf der Pumpenwelle und damit die vorgenannte Dichtspaltweite festgelegt.Such a centrifugal pump is known in practice. The built-in adjustment means, with which the sealing gap width between the pump impeller and the front wall portion of the pump housing after a certain period of operation of the centrifugal pump for wear reasons, must be readjusted to raise the efficiency of the centrifugal pump again, consists of a spacer. This spacer is seated on the pump shaft and is located on the one hand at the axial stop and on the other hand on the rear wall of the pump impeller. In this way, d. H. with the help of the thickness of the spacer, the axial position of the pump impeller on the pump shaft and thus the aforementioned sealing gap width is fixed.
Ist jedoch die Dichtspaltweite zu groß geworden, und zwar im Wesentlichen durch Verschleiß an den freien axialen Schaufelseiten des Pumpenlaufrades, weil das Laufrad keine vordere Deckscheibe aufweist, ist eine umständliche und zeitaufwändige Demontage und Wiedermontage des Laufrades erforderlich, wobei das Pumpengehäuse sehr weit geöffnet werden muss, um die genannte Distanzscheibe gegen eine dickere auszutauschen oder um eine weitere Distanzscheibe auf die Pumpenwelle aufzusetzen. In beiden Fällen entspricht die Dickenzunahme der jeweiligen Distanzscheibe dem Verschleißmaß.However, if the sealing gap width has become too large, essentially due to wear on the free axial blade sides of the impeller, because the impeller has no front cover plate, a cumbersome and time-consuming disassembly and reassembly of the impeller is required, the pump housing must be opened very wide to replace the aforementioned spacer against a thicker or to put another spacer on the pump shaft. In both cases, the increase in thickness of the respective spacer corresponds to the wear dimension.
Aus
Die Aufgabe der Erfindung besteht in der Verbesserung einer Kreiselpumpe der einleitend angeführten Art dahingehend, dass die Dichtspaltweite zwischen der Vorderseite des Pumpenlaufrades und dem dieser Vorderseite gegenüberliegenden Wandbereich des Pumpengehäuses auf einfache und schnelle Weise nach Verschleißerscheinungen auf der Laufradvorderseite und/oder im Saugmundwandbereich des Pumpengehäuses wieder auf den ursprünglichen Wert einstellbar ist.The object of the invention is to improve a centrifugal pump of the introductory type such that the sealing gap width between the front of the pump impeller and the opposite side of this wall portion of the pump housing in a simple and fast way to wear on the impeller front and / or Saugmundwandbereich of the pump housing again is adjustable to the original value.
Die Lösung dieser Aufgabe ist in dem Anspruch 1 angeführt.The solution to this problem is stated in claim 1.
Mit dieser Lösung kann die genannte Dichtspaltweite wieder schnell und einfach auf ihre ursprüngliche Weite eingestellt werden. Es braucht lediglich das Druckstück, welches in üblicher Weise mit Hilfe der Kraft einer Schraube, die axial in das Ende der Pumpenwelle eingeschraubt ist, gegen die Vorderseite der Nabe des Pumpenlaufrades gedrückt wird, durch Lösen der Schraube entfernt zu werden. Danach wird der anstelle der vorgenannten Distanzscheibe verwendete Gewindering verdreht, wodurch sich das Pumpenlaufrad nach vorne, d. h. zum zentralen Ansaugbereich der Pumpe hin, verstellt. Dies hat zur Folge, dass sich die Dichtspaltweite zwischen den Schaufeln oder der vorderen Deckscheibe des Pumpenlaufrades und dem diesen Schaufeln bzw. dieser Deckscheibe innen gegenüberliegenden Wandbereich des Pumpengehäuses wieder verkleinert. Anschließend wird das genannte Druckstück wieder aufgesetzt und die Schraube festgezogen, um die Neueinstellung der Dichtspaltweite zu sichern. Bei dieser Lösung braucht somit das Pumpenlaufrad nicht von der Pumpenwelle demontiert zu werden, da der zu verstellende Gewindering vom Ansaugbereich des Pumpengehäuses her nach Entfernung lediglich des genannten Druckstückes ohne weiteres zugänglich ist.With this solution, the mentioned sealing gap width can be quickly and easily adjusted to its original width again. It only needs the pressure piece, which is pressed in a conventional manner by means of the force of a screw which is screwed axially into the end of the pump shaft, against the front of the hub of the pump impeller, to be removed by loosening the screw. Thereafter, the threaded ring used instead of the aforementioned spacer is rotated, whereby the pump impeller to the front, ie adjusted to the central intake of the pump. As a result, the sealing gap width between the blades or the front cover disk of the pump impeller and the wall region of the pump housing opposing the inside of these blades or cover disk decreases again. Subsequently, said pressure piece is replaced and tightened the screw to secure the readjustment of the sealing gap width. In this solution, therefore, the pump impeller does not need to be disassembled from the pump shaft, since the threaded ring to be adjusted from the intake of the pump housing after removal of only said pressure piece is readily accessible.
Die vorgeschlagene Lösung eignet sich besonders für Abwasserpumpen, und zwar für solche, die einen zentralen und frei zugänglichen Ansaugbereich aufweisen. Bei derartigen Abwasserpumpen ist die erfindungsgemäße Lösung dann besonders vorteilhaft, wenn im zentralen Ansaugbereich ein Schneidwerk vorgesehen ist, welches dazu dient, größere Feststoffe im Fördermedium zu zerkleinern. Ein solches Schneidwerk weist neben einer stehenden, ringförmigen Schneidplatte ein zentrales rotierendes Messerteil auf, welches anstelle des vorerwähnten Druckstückes an der Pumpenwelle befestigt ist und auch die Funktion des Druckstücks übernimmt. Bei Verwendung eines Schneidwerkes unterliegt das Pumpenlaufrad aufgrund der Feststoffe im Fördermedium einem erhöhten Verschleiß, so dass sich die erwähnte Dichtspaltweite schneller vergrößert. Es ist daher erforderlich, den Dichtspalt in kürzeren Zeitintervallen wieder neu einzustellen. Hierbei macht sich der Zeitgewinn bei der Neueinstellung der Dichtspaltweite aufgrund der erfindungsgemäßen Lösung besonders vorteilhaft bemerkbar.The proposed solution is particularly suitable for sewage pumps, namely for those who have a central and freely accessible intake. In the case of such wastewater pumps, the solution according to the invention is particularly advantageous when a cutting unit is provided in the central intake area, which serves to comminute larger solids in the pumped medium. Such a cutting unit, in addition to a standing, annular cutting plate on a central rotating blade part, which is fixed instead of the aforementioned pressure piece on the pump shaft and also takes over the function of the pressure piece. When using a cutting mechanism, the pump impeller is subject to increased wear due to the solids in the fluid, so that the aforementioned sealing gap increases faster. It is therefore necessary to readjust the sealing gap in shorter time intervals. Here, the time gain in the new setting of the sealing gap width due to the inventive solution makes particularly advantageous.
In vorteilhafter Ausgestaltung der erfindungsgemäßen Kreiselpumpe ist das Gewinde des Gewinderinges als Außengewinde und das Gewinde in dem vorderen Nabenbereich des Pumpenlaufrades als Innengewinde ausgebildet. Dies ergibt eine einfache Ausbildung des Gewinderinges. Weiterhin ist vorteilhaft, dass die beiden Gewinde als Feingewinde vorgesehen sind, wodurch eine sehr genaue Einstellung der Dichtspaltweite zwischen Laufrad und Pumpengehäuse möglich ist.In an advantageous embodiment of the centrifugal pump according to the invention, the thread of the threaded ring is designed as an external thread and the thread in the front hub region of the pump impeller as an internal thread. This results in a simple design of the threaded ring. Furthermore, it is advantageous that the two threads are provided as a fine thread, whereby a very accurate adjustment of the sealing gap width between impeller and pump housing is possible.
Weiterhin ist der Gewindering mittels eines Druckkörpers in seiner axialen Lage gesichert, wobei der Druckkörper den Gewindering gegen den axialen Anschlag der Pumpenwelle drückt und selbst mit dem Ende der Pumpenwelle verschraubt ist. Der Druckkörper kann des Weiteren als Schneidmittel eines im Ansaugbereich der Kreiselpumpe vorgesehenen Schneidwerkes ausgebildet sein.Furthermore, the threaded ring is secured by means of a pressure body in its axial position, wherein the pressure body presses the threaded ring against the axial stop of the pump shaft and is itself bolted to the end of the pump shaft. The pressure body may further be formed as a cutting means of a provided in the intake of the centrifugal pump cutting unit.
Die Erfindung ist nachstehend anhand eines in der anliegenden Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Die Zeichnung zeigt das Ausführungsbeispiel in einer einzigen Figur und im Axialschnitt.The invention is explained below with reference to an embodiment shown in the accompanying drawings. The drawing shows the embodiment in a single figure and in axial section.
Die einzige Zeichnung zeigt eine einstufige, allgemein mit 1 bezeichnete Kreiselpumpe, deren Gehäuse 2 mittels eines Klemmringes 3 an einem teilweise dargestellten Antriebsmotor 4 für die Kreiselpumpe befestigt ist. An einer Pumpenwelle 5 ist ein Pumpenlaufrad 6 drehfest, jedoch axial verschiebbar angeordnet. Das Pumpenlaufrad weist eine zentrale Nabe 7 und eine hintere Deckscheibe 8 mit den üblichen Schaufeln 9 auf. Die Kreiselpumpe 1 ist eine zentral ansaugende Pumpe, weshalb das Pumpengehäuse 2 mit einem zentralen Ansaugbereich 10 versehen ist. Wenn die Kreiselpumpe vorteilhaft als Abwasserpumpe eingesetzt wird, ist das Pumpengehäuse 2 mit mehreren Stützfüßen 11 versehen, mit welchen sich die Kreiselpumpe auf einer Stützfläche (nicht gezeigt) abstützt. Das Pumpenlaufrad 6 weist im gezeigten Fall keine vordere Deckscheibe auf, so dass dessen Schaufeln 9 dem vorderen Wandbereich 2a des Pumpengehäuses 2 unmittelbar gegenüberliegen. Zwischen den Schaufeln 9 und dem vorderen wand bereich 2a besteht ein Dichtspalt 12, dessen Weite so eingestellt ist, dass der durch diesen Spalt bedingte Wirkungsgradverlust der Kreiselpumpe 1 so gering wie möglich ist.The single drawing shows a single-stage, generally designated 1 centrifugal pump whose housing 2 is fixed by means of a clamping ring 3 to a drive motor 4 partially shown for the centrifugal pump. On a
Die Pumpenwelle 5 ist mit einem axialen Anschlag 13 versehen, der im gezeigten Fall durch einen abgesetzten Endabschnitt 14 der Pumpenwelle gebildet ist. Auf diesem Abschnitt 14 sitzt lose ein Gewindering 15, der somit auf dem Abschnitt 14 frei drehbar und frei verschiebbar ist. Der Gewindering 15 besitzt im gezeigten Fall ein Außengewinde 16, welches in ein Innengewinde 17 eingreift, das in einem vorderen Rezess 18 der Nabe 7 des Pumpenlaufrades 6 vorgesehen ist. Vorzugsweise sind die beiden Gewinde 16 und 17 als Feingewinde ausgebildet, so dass das Pumpenlaufrad 6 axial sehr genau verstellt werden kann, um wiederum die Weite des Dichtspaltes 12 sehr genau einstellen zu können.The
Auf dem vorderen Endabschnitt 14 der Pumpenwelle 5 sitzt ein Druckkörper 20, der mittels einer in den Abschnitt 14 axial eingreifenden Schraube 21 im gezeigten Fall gegen das Pumpenlaufrad 6 gedrückt wird. Der Druckkörper 20 leitet seine Druckkraft somit über das Pumpenlaufrad 6 und über die beiden genannten Gewinde 16 und 17 in den Gewindering 15 ein, der seinerseits gegen den axialen Anschlag 13 drückt. Da das Pumpenlaufrad in üblicher Weise drehsicher auf der Pumpenwelle 5 sitzt, sind das Pumpenlaufrad 6 und der Gewindering 15 positionssicher auf der Pumpenwelle 5 festgelegt, wenn der Druckkörper 20 mittels der Schraube 21 fest angezogen ist. Der Druckkörper kann jedoch auch so ausgebildet sein, dass er gegen den Gewindering 15 drückt, der seinerseits dann gegen den axialen Anschlag 13 der Pumpenwelle gedrückt wird und somit ebenfalls ortsfest arretiert ist. Aufgrund der drehfesten Lagerung des Pumpenlaufrades 6 auf der Pumpenwelle 5 kann sich das Pumpenlaufrad auch in diesem Falle nicht verstellen.On the
Der Druckkörper 20 kann auch als Schneidmittel eines im Ansaugbereich 10 der Kreiselpumpe 1 angeordneten Schneidwerkes zum Zerkleinern von Feststoffanteilen des von der Kreiselpumpe geförderten, mit Feststoffen belasteten Fördermediums ausgebildet sein. In diesem Fall ist der Druckkörper mit wenigstens einem Schneidzahn 22 versehen und dient als rotierendes Schneidmittel. Der rotierende Druckkörper arbeitet mit einer stationären, ringförmigen Schneidplatte 23 zusammen, die an dem Pumpengehäuse 2 drehfest angeordnet ist und wenigstens einen Gegenschneidzahn 24 aufweist.The
In alternativer Ausgestaltung des axialen Anschlages 13 kann auch so vorgegangen sein, dass die Pumpenwelle mit einem radial vorstehenden Ringbund versehen ist, dessen eine axiale Schulter als Anschlagfläche für den Gewindering 15 dient. In weiterer Abänderung kann der Gewindering 15 auch mit einem Innengewinde versehen sein, welches dann in ein entsprechendes Außengewinde der Nabe 7 des Pumpenlaufrades 6 eingreift. In diesem Fall ist der Gewindering mit einem äußeren, axial verlaufenden Kragen versehen, der auf seiner inneren Ringseite mit dem Innengewinde versehen ist. Die Nabe 7 besitzt hierzu einen axial vorspringenden Ringteil, der mit dem Außengewinde versehen ist.In an alternative embodiment of the
Claims (5)
- A single-stage centrifugal pump, on whose pump shaft (5) provided in a pump housing (2), a pump impeller (6) which is free of a cover disk on the front side, is fastened, wherein the pump shaft (5) is provided with an axial abutment (13) and a setting device bearing thereon, said setting device engaging on the pump impeller (6) on the other side, in order to set the sealing gap width between the blades (9) of the pump impeller (6) and the wall region of the pump housing (2), said wall region lying opposite these blades (9),
characterised in that the setting device is formed by a threaded ring (15) which is seated on the pump shaft (5) in a loose manner and by a thread (17) which is provided in the front hub region of the pump impeller (6) and into which the thread (16) of the threaded ring (15) is screwed. - A centrifugal pump according to claim 1, characterised in that the thread (16) of the threaded ring (15) is an outer thread, and the thread (17) in the front hub region of the pump impeller (6) is an inner thread.
- A centrifugal pump according to claim 1 or 2, characterised in that the two threads (16, 17) are designed as fine threads.
- A centrifugal pump according to claim 1, 2 or 3, characterised in that the threaded ring (15) is secured in its position by way of a pressure body (20) which presses it against the axial abutment (13) of the pump shaft (5) and which is screwed axially to the end of the pump shaft.
- A centrifugal pump according to claim 4, characterised in that the pressure body (20) is formed with cutting means (22) for the size reduction of solid matter constituents of the delivery medium which is delivered by the centrifugal pump and is contaminated with solid matter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20115516U | 2001-09-20 | ||
| DE20115516U DE20115516U1 (en) | 2001-09-20 | 2001-09-20 | Centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1296062A1 EP1296062A1 (en) | 2003-03-26 |
| EP1296062B1 true EP1296062B1 (en) | 2011-01-05 |
Family
ID=7961939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02020615A Expired - Lifetime EP1296062B1 (en) | 2001-09-20 | 2002-09-13 | Centrifugal pump |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6746206B2 (en) |
| EP (1) | EP1296062B1 (en) |
| DE (2) | DE20115516U1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322443A (en) * | 2011-09-08 | 2012-01-18 | 浙江工业大学 | Single-stage centrifugal pump with balanced axial force |
| DE102014116449A1 (en) | 2014-11-11 | 2016-05-12 | Munsch Chemie-Pumpen Gmbh | Adjustment device for the relative axial extension of two components of an assembly |
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| SE531139C2 (en) * | 2007-05-08 | 2009-01-07 | Itt Mfg Enterprises Inc | Pump unit and method |
| DE102008001814A1 (en) * | 2008-05-15 | 2009-11-19 | Würdig, Uwe | Device for impeller sealing in centrifugal pumps |
| US7789049B2 (en) * | 2008-07-14 | 2010-09-07 | Honda Motor Co., Ltd. | Variable capacity water pump via electromagnetic control |
| DE102011077544A1 (en) * | 2011-06-15 | 2012-12-20 | Ksb Aktiengesellschaft | Grinder pump |
| SE539558C2 (en) * | 2013-08-15 | 2017-10-10 | Xylem Ip Man Sarl | Pump for pumping fluid and impeller assembly |
| ES2744195T3 (en) * | 2016-10-18 | 2020-02-24 | Xylem Europe Gmbh | Cutter wheel, cutter disk, as well as cutter assembly, suitable for crushing pumps |
| US20210310371A1 (en) * | 2020-04-07 | 2021-10-07 | Garrett Transportation I Inc | Motorized compressor device with air bearing having reduced axial and radial stack-up |
| CN116044749B (en) * | 2022-12-27 | 2024-12-10 | 江苏湖润泵业科技有限公司 | A vane pump with anti-leakage function for hydraulic equipment |
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| US5306124A (en) * | 1993-03-24 | 1994-04-26 | Laibe Supply Corporation | Slurry pump and seal system |
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| US4487557A (en) * | 1982-09-28 | 1984-12-11 | Autoclave Engineers | Magnetically driven centrifugal pump |
| FI824113A0 (en) | 1982-11-30 | 1982-11-30 | Ahlstroem Oy | FOERFARANDE OCH ANORDNING FOER FIBRERING AV FOERBEHANDLAT AVFALLSPAPPER |
| DE3513116A1 (en) * | 1985-04-12 | 1986-10-23 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Controlled seal on centrifugal pump impellers |
| DE4421888A1 (en) * | 1994-06-23 | 1996-01-04 | Klein Schanzlin & Becker Ag | Device for axial thrust compensation in centrifugal pumps |
| DE19960160B4 (en) * | 1999-12-14 | 2014-09-11 | Mahle International Gmbh | Device for optimizing the gap width of centrifugal pumps |
| DE10038586A1 (en) * | 2000-08-03 | 2002-02-14 | Ksb Ag | Axial thrust |
-
2001
- 2001-09-20 DE DE20115516U patent/DE20115516U1/en not_active Expired - Lifetime
-
2002
- 2002-09-13 DE DE50214845T patent/DE50214845D1/en not_active Expired - Lifetime
- 2002-09-13 EP EP02020615A patent/EP1296062B1/en not_active Expired - Lifetime
- 2002-09-19 US US10/247,092 patent/US6746206B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5306124A (en) * | 1993-03-24 | 1994-04-26 | Laibe Supply Corporation | Slurry pump and seal system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322443A (en) * | 2011-09-08 | 2012-01-18 | 浙江工业大学 | Single-stage centrifugal pump with balanced axial force |
| DE102014116449A1 (en) | 2014-11-11 | 2016-05-12 | Munsch Chemie-Pumpen Gmbh | Adjustment device for the relative axial extension of two components of an assembly |
| DE102014116449B4 (en) | 2014-11-11 | 2023-08-17 | Munsch Chemie-Pumpen Gmbh | Pump with a bearing bracket, an intermediate lantern and an adjustment device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030072650A1 (en) | 2003-04-17 |
| DE20115516U1 (en) | 2001-11-29 |
| DE50214845D1 (en) | 2011-02-17 |
| US6746206B2 (en) | 2004-06-08 |
| EP1296062A1 (en) | 2003-03-26 |
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