EP1344944B1 - Kreiselpumpe mit Zerkleinerungseinrichtung - Google Patents
Kreiselpumpe mit Zerkleinerungseinrichtung Download PDFInfo
- Publication number
- EP1344944B1 EP1344944B1 EP03005084A EP03005084A EP1344944B1 EP 1344944 B1 EP1344944 B1 EP 1344944B1 EP 03005084 A EP03005084 A EP 03005084A EP 03005084 A EP03005084 A EP 03005084A EP 1344944 B1 EP1344944 B1 EP 1344944B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- cutting
- cutting head
- pump according
- impeller
- 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
Links
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Classifications
-
- 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
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
Definitions
- the invention relates to a centrifugal pump with a pump impeller upstream shredding device for fibrous or lumpy Admixtures in the conveying liquid, whereby the comminution device by one rotating with the pump impeller, with several cutting edges provided cutting head and a cooperating with the cutting head, Formed in the housing of the centrifugal pump arranged cutting insert becomes.
- centrifugal pump is previously known from DE 37 03 647 C2.
- These learned pump has a cutting insert that has a plurality of teeth is provided, which is in the of the cutting edges of the rotating part coated area.
- the leading edges of the downstream of the Shredder blades of the impeller are exposed, such as it basically with the shredding devices of this type equipped centrifugal pumps is the case.
- can add admixtures to the leading edges after passing the Shredding device have a reduced extension, but that are still large enough to be held by a leading edge.
- the Accumulations lead to a deterioration in the conveying properties of the affected centrifugal pump; in extreme cases, they can cause constipation and cause serious damage.
- the invention has for its object a centrifugal pump of the beginning mentioned type to create the risk of deterioration shown their conveying properties or even the constipation caused by co-promoted Admixtures overcome.
- the cutting head with several, essentially axially extending, delimited by webs Recesses is provided, the webs equipped with cutting edges cover the leading edges of the blades of the impeller and a stepless one Own transition to the contour of the blades while the recesses have a smooth transition to the channels of the impeller.
- the design according to the invention has the advantage that edges on which Additions could accumulate, are not available. This applies equally for centrifugal pumps, the impellers of which are in one piece Cutting head are equipped, as well as for versions in which the Cutting head is interchangeably arranged. Because even in the latter case the leading edge is completely covered by the contour of the cutting head.
- a configuration which is advantageous for special purposes is characterized by a cutting head with one or more on its suction end arranged blades is equipped. This will remove one from the impeller directed partial flow is generated, which is suitable in the liquid whirl up solid substances contained. This is particularly advantageous when viewed vertically centrifugal pumps sucking in a container: admixtures that are on the ground could settle, are whirled up and guided by the impeller Main stream fed.
- the cutting head can be one of the number of recesses or the number the webs of the cutting insert located between the recesses have different number of cutting edges. This allows one Adaptation of the cutting head to the number of blades on the impeller maintaining the shape and properties of the cutting insert.
- the cutting edges of the cutting head and the cutting insert can have different forms of the course.
- the Cutting edges run parallel to the axis or helically.
- the course forms can also be different for the cutting head and cutting insert.
- the cutting head and cutting insert are advantageous equally equipped with helical cutting edges are, but with the screw vectors of the two cutting edge designs are directed towards each other.
- the invention is not only suitable for impellers with a suction and one pressure side cover plate. It can also be used advantageously with such wheels use, which themselves have only a pressure-side cover plate, the suction-side cover plate, however, quasi through a housing wall or as Cover plate designed part of the housing wall is formed.
- the one between the Paddles of the impeller and the cover plate fixed to the housing is formed expediently designed to be adjustable.
- the separate design of the cutting insert and cutting head has the advantage that for these parts that are particularly subject to wear, a harder part Material can be used as for the impeller and housing. at wear of the parts mentioned is also a simple, comparative inexpensive replacement possible.
- the non-rotatable connection between the cutting head and the impeller as well between the cutting insert and the housing of the centrifugal pump advantageously each via a pin.
- the centrifugal pump 2 of FIG. 1 driven by an electric motor 1 has a Impeller 5 arranged in a housing 3 on a shaft 4.
- the impeller 5 is connected to a cutting head 8 by a screw 6 and a pin 7.
- the the entry of the impeller 5 upstream cutting head 8 is comprised by a cutting insert 10 connected to the housing 3 via screws 9.
- the impeller 5 shown as a detail in FIG. 2 has four blades 11, between which channels 12 are formed.
- the blades 11 are on the pressure-side cover plate 13 of the impeller 5 is arranged.
- a suction side The impeller 5 itself does not have a cover disk.
- a suction-side cover plate 14 As shown in FIG. 1, it is inserted into the housing 3 and via screws 15 associated with this.
- the cutting head 8 of FIG. 3 has four webs 16, on the respective cutting edges 17 are provided.
- the webs 16 cover the leading edges of the blades 11 completely.
- the recesses 18 can also have a different course, for example a helical one. In in any case, however, the recesses 18 are stepless in their full width the channels 12 of the impeller 5 over.
- the cutting insert 10 of FIGS. 4 and 5 has one towards the cutting head 8 open axial access 19.
- the cutting insert 10 is also with Provided recesses 20 which provide additional radial access to the Open the fluid to the cutting head 8.
- In the inner wall of the Cutting insert 10 is a over the entire axial extent of the Cutting insert 10 incorporated helical groove 21.
- the groove 21 helps to improve the size reduction and the promotion of Additions at.
- Fig. 6 shows a cutting head 22, which in its basic structure Cutting head 8 corresponds.
- the cutting head 22 also has an over the cutting insert 10 projecting cylinder 23, which acts as a carrier of four blades 24 acts.
- the blades 24 are otherwise with the suction side of the Centrifugal pump 2 facing the end of the webs 16 connected.
- the blades 24 have a sloping towards the outer diameter of the cutting head 22 Course.
- the blades 24, like the cylinder 23, are included with rounded edges.
- the blade shape and the rounding of the Edges serve to adhere rags, braid-like structures or to prevent something similar.
- the actual function of the blades 24 is, with one - not shown - a container with a centrifugal pump arranged vertically therein Deposits of the conveyed liquid on the bottom of the container avoid. This happens because the blades 24 have a partial flow generate that acts in the direction of the bottom of the container and whirl up there sedative admixtures caused. The admixtures are thereby from the main flow directed to the impeller 5 and finally the im essentially formed by the cutting head 22 and the cutting insert 10 Comminution device supplied, crushed there and from the blades 11 the impeller 5 in a line - also not shown - promoted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Pulverization Processes (AREA)
Description
- Fig. 1
- eine erfindungsgemäße Kreiselpumpe in Schnittdarstellung;
- Fig. 2
- das Laufrad der Kreiselpumpe der Fig. 1;
- Fig. 3
- den Schneidkopf der Kreiselpumpe der Fig. 1;
- Fig. 4 und 5
- den mit dem Schneidkopf der Fig. 3 zusammenwirkenden Schneideinsatz in zwei Ansichten,
- Fig. 6
- einen Schneidkopf, der zusätzlich mit an der Sauseite angeordneten Schaufeln ausgestattet ist.
Claims (17)
- Kreiselpumpe mit einer dem Pumpenlaufrad vorgeschalteten Zerkleinerungseinrichtung für faserige oder stückige Beimengungen in der Förderflüssigkeit, wobei die Zerkleinerungseinrichtung durch einen mit dem Pumpenlaufrad umlaufenden, mit mehreren Schneidkanten versehenen Schneidkopf und einen mit dem Schneidkopf zusammenwirkenden, im Gehäuse der Kreiselpumpe feststehend angeordneten Schneideinsatz gebildet wird, dadurch gekennzeichnet, daß der Schneidkopf (8, 22) mit mehreren, im wesentlichen axial verlaufenden, durch Stege (16) begrenzten Ausnehmungen (18) versehen ist, wobei die mit Schneidkanten (17) ausgestatteten Stege (16) die Eintrittskanten der Schaufeln (11) des Laufrades (5) abdecken und einen stufenlosen Übergang zu der Kontur der Schaufeln (11) besitzen, während die Ausnehmungen (18) einen stufenlosen Übergang zu den Kanälen (12) des Laufrades (5) besitzen.
- Kreiselpumpe nach Anspruch 1, gekennzeichnet durch einen Schneidkopf (22), der mit einer oder mehreren an seiner saugseitigen Stirnseite angeordneten Schaufeln (24) ausgestattet ist.
- Kreiselpumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Schaufeln (24) des Schneidkopfes einen zum Außendurchmesser des Schneidkopfes (22) hin abfallenden Verlauf besitzen.
- Kreiselpumpe nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Schaufeln (24) des Schneidkopfes mit einem über den Schneideinsatz (10) vorragenden Zylinder (23) verbunden sind.
- Kreiselpumpe nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Schaufeln (24) des Schneidkpofes und/oder der Zylinder (23) mit abgerundeten Kanten versehen sind.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Schneideinsatz (10) für eine in axialer Richtung erfolgende Zuströmung zum Schneidkopf (8, 22) hin offen ist und für eine in radialer Richtung erfolgende Zuströmung zum Schneidkopf (8, 22) Ausnehmungen (20) besitzt.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Schneidkopf (8, 22) eine von der Anzahl der Ausnehmungen (20) des Schneideinsatzes (10) unterschiedliche Anzahl an Ausnehmungen (18) besitzt.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Schneidkanten (17) des Schneidkopfes (8, 22) und/oder des Schneideinsatzes (10) achsparallel verlaufen.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Schneidkanten (17) des Schneidkopfes (8, 22) und/oder des Schneideinsatzes (10) schraubenförmig verlaufen.
- Kreiselpumpe nach Anspruch 9, dadurch gekennzeichnet, daß bei schraubenförmigem Verlauf der Schneidkanten (17) des Schneidkopfes (8, 22) und des Schneideinsatzes (10) die Schraubenvektoren des Schneidkopfes (8, 22) und des Schneideinsatzes (10) gegeneinander gerichtet sind.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, gekennzeichnet durch ein Laufrad (5) , das saugseitig ohne mitrotierende Deckscheibe ausgeführt ist und das gegenüber einer im Gehäuse (3) der Kreiselpumpe (2) fest angeordneten Deckscheibe (14) einen einstellbaren Spalt besitzt.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Schneideinsatz (10) auswechselbar mit der im Gehäuse (3) feststehenden Deckscheibe (13) verbunden ist.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Schneidkopf (8, 22) einteilig mit dem Laufrad (5) ausgeführt ist.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Schneidkopf (8,22) einteilig mit der druckseitigen Deckscheibe (13) des Laufrades (5) ausgeführt ist.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Schneidkopf (8, 22) auswechselbar mit der druckseitigen Deckscheibe (13) des Laufrades (5) verbunden ist.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß eine drehfeste Verbindung des Schneideinsatzes (10) und/oder des Schneidkopfes (8, 22) jeweils über einen Stift (7) erfolgt.
- Kreiselpumpe nach einem der vorangegangenen Ansprüche, gekennzeichnet durch eine über die gesamte axiale Erstreckung des Schneideinsatzes (10) schraubenförmig verlaufende Nut (21) in der Innenwand des Schneideinsatzes (10).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10211096 | 2002-03-14 | ||
DE10211096 | 2002-03-14 | ||
DE10305726 | 2003-02-12 | ||
DE10305726A DE10305726A1 (de) | 2002-03-14 | 2003-02-12 | Kreiselpumpe mit Zerkleinerungseinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1344944A1 EP1344944A1 (de) | 2003-09-17 |
EP1344944B1 true EP1344944B1 (de) | 2004-06-02 |
Family
ID=27766699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03005084A Expired - Lifetime EP1344944B1 (de) | 2002-03-14 | 2003-03-07 | Kreiselpumpe mit Zerkleinerungseinrichtung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1344944B1 (de) |
AT (1) | ATE268436T1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2113670A2 (de) | 2008-04-30 | 2009-11-04 | KSB Aktiengesellschaft | Kreiselpumpe mit Zerkleinerungseinrichtung |
DE102016225920A1 (de) | 2016-12-21 | 2018-06-21 | KSB SE & Co. KGaA | Kreiselpumpe mit einer Zerkleinerungsanordnung |
DE102016225921A1 (de) | 2016-12-21 | 2018-06-21 | KSB SE & Co. KGaA | Abwasserhebeanlage mit Schneidwerk |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9475059B2 (en) | 2013-03-15 | 2016-10-25 | Pentair Flow Technologies, Llc | Cutting blade assembly |
US10533557B2 (en) | 2016-04-26 | 2020-01-14 | Pentair Flow Technologies, Llc | Cutting assembly for a chopper pump |
LU102842B1 (de) * | 2021-06-24 | 2022-12-29 | Wilo Se | Schneidkopf einer Pumpe |
LU102841B1 (de) * | 2021-06-24 | 2022-12-27 | Wilo Se | Anordnung umfassend ein Laufrad und einen Schneidkopf für mit Feststoff belastete Flüssigkeit einer Pumpe |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3444818A (en) * | 1966-10-10 | 1969-05-20 | Robert W Sutton | Centrifugal pump |
US4456424A (en) * | 1981-03-05 | 1984-06-26 | Toyo Denki Kogyosho Co., Ltd. | Underwater sand pump |
SE444969B (sv) * | 1982-10-11 | 1986-05-20 | Flygt Ab | Centrifugalpump avseddd for pumpning av vetskor innehallande fasta partiklar |
DE3703647A1 (de) * | 1987-02-06 | 1988-08-18 | Klein Schanzlin & Becker Ag | Kreiselpumpe fuer verunreinigte fluessigkeiten |
US4904159A (en) * | 1988-07-18 | 1990-02-27 | Suburbia Systems, Inc. | Pump impeller |
US5016825A (en) * | 1990-02-14 | 1991-05-21 | Mcneil (Ohio) Corporation | Grinding impeller assembly for a grinder pump |
CH689058A5 (de) * | 1994-11-28 | 1998-08-31 | Haeny & Cie Ag | Kreiselpumpe fuer mit Feststoffanteilen belastete Abwaesser. |
GB9612201D0 (en) * | 1996-06-11 | 1996-08-14 | Sweepax International Limited | Rotodynamic pump |
DE19834815A1 (de) * | 1998-08-01 | 2000-02-10 | Orpu Gmbh | Pumpe mit einer Schneideinrichtung zum Fördern eines mit festen Bestandteilen vermischten Fördermediums |
-
2003
- 2003-03-07 EP EP03005084A patent/EP1344944B1/de not_active Expired - Lifetime
- 2003-03-07 AT AT03005084T patent/ATE268436T1/de active
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2113670A2 (de) | 2008-04-30 | 2009-11-04 | KSB Aktiengesellschaft | Kreiselpumpe mit Zerkleinerungseinrichtung |
DE102008021767A1 (de) | 2008-04-30 | 2009-11-05 | Ksb Aktiengesellschaft | Kreiselpumpe mit Zerkleinerungseinrichtung |
DE102016225920A1 (de) | 2016-12-21 | 2018-06-21 | KSB SE & Co. KGaA | Kreiselpumpe mit einer Zerkleinerungsanordnung |
DE102016225921A1 (de) | 2016-12-21 | 2018-06-21 | KSB SE & Co. KGaA | Abwasserhebeanlage mit Schneidwerk |
WO2018114511A1 (de) | 2016-12-21 | 2018-06-28 | KSB SE & Co. KGaA | Abwasserhebeanlage mit schneidwerk |
WO2018114507A1 (de) | 2016-12-21 | 2018-06-28 | KSB SE & Co. KGaA | Kreiselpumpe mit einer zerkleinerungsanordnung |
Also Published As
Publication number | Publication date |
---|---|
ATE268436T1 (de) | 2004-06-15 |
EP1344944A1 (de) | 2003-09-17 |
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