EP0911527A1 - Pump with a cutting device - Google Patents
Pump with a cutting device Download PDFInfo
- Publication number
- EP0911527A1 EP0911527A1 EP97118599A EP97118599A EP0911527A1 EP 0911527 A1 EP0911527 A1 EP 0911527A1 EP 97118599 A EP97118599 A EP 97118599A EP 97118599 A EP97118599 A EP 97118599A EP 0911527 A1 EP0911527 A1 EP 0911527A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- pump
- pump according
- pump impeller
- knife
- 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
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- 238000005520 cutting process Methods 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 2
- 230000013011 mating Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000012549 training Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000792859 Enema Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000007920 enema Substances 0.000 description 1
- 229940095399 enema Drugs 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000011345 viscous material Substances 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
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
- B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
-
- 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
Definitions
- the invention relates to a pump with a cutting device for conveying a Pumped medium, which is caused by impurities, thick matter and. Like. is burdened with a in a pump housing rotatably and sealed guided, rotating Pump impeller on which one or more cutting blades of the cutting device are arranged, cutting blade and pump impeller driven together are and the pump impeller a hollow, the media flow inside leading, rotationally symmetrical protruding outward into the medium Has structure, on or in which the rotating cutting knife attached are.
- Such a pump allows the comminution of piece goods or the dilution of liquids containing viscous substances at the entrance.
- the rotating cutting knife (s) are positive or non-positive with connected to the pump impeller and can be a further training of the pump impeller inlet be understood.
- the drive and speed of rotation of the pump impeller and the cutting knife are therefore the same.
- the material to be conveyed or the conveyed medium can be behind the rotating one Cutting knife flow freely to the pump impeller and a loop a shaft or an extended pump impeller hub is not required.
- a flow direction with cutting channels provided pump impeller a cutting piece, which is pressed resiliently and thus avoid a piece of goods that is difficult to cut can.
- the cutting channels do not allow the greatest possible flow and the upstream cutting piece only covers the openings of the cutting channels further and does not contribute to an increase in the volume flows.
- the invention has for its object in a pump impeller that a the medium to be sucked up has a structure, the arrangement, the effect and improve the maintenance of the cutter.
- the width and length of the recesses can be the size of the resulting Material to be cut.
- the formation of the pump impeller as after The structure protruding outside into the medium offers a scope for this which is known in the art Cutting devices is not available.
- width and length or shape of the recesses the desired flow rate are coordinated.
- the on the cone of the pump impeller lying cutting knives are curved. This measure also bears to an angular momentum on the flow, thereby reducing the suction of the pump impeller is amplified and the flow rotating around the cutting device creates.
- the desired rotational effect in the flow is e.g. generated by the fact that the arc shape of the cutting knives, for example, the course of teeth on spiral bevel gears corresponds.
- a flow guide suitable for the cutting process can also be improved by the fact that with a pump impeller projecting downwards and a fixed counter knife hood protruding downwards the pump housing a cutting bell with a mounting flange for a connecting pipeline is provided, which surrounds the fixed counter knife hood and forms a streamlined inlet on the counter knife hood.
- the fastening flange is part of a closed piping system.
- a rotating pump impeller 2 is rotatably mounted in the interior 2a and led sealed.
- a cutting device 3 consists of on the pump impeller 2 attached cutting blades 4, the counter-cutting blade 5 at one fixed counter knife hood 6 are formed.
- the cutting blades 4 and the pump impeller 2 are together via a shaft 7 driven.
- the pump impeller 2 and the fixed counter knife cover 6 form with an inner cutting gap distance a hollow, inside 2a the media flow leading, protruding outward into the medium in a rotational shape symmetrical structure 8.
- the angle 10 of the cutting knife 4 on the pump impeller 2 is measured between a tangent 17 and the cutting edge 9a of a recess 9 about 18 to 40 °.
- Fig. 2 they are on the cone jacket 2b of the pump impeller 2 lying cutting knives 4 curved, i.e. they have an arch shape 18 on e.g. correspond approximately to the course of teeth in spiral bevel gears could.
- the distance 19 on the circumference of successive cutting knives 4 can be seen unequal size. Two or more successive cutting knives each 4 form a group 20 and keep a smaller distance 19 between them than that Distance 21 to the next group 23 is.
- the mounting flange 25 can be part of a closed piping system (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Food Science & Technology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Massaging Devices (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Road Repair (AREA)
Abstract
Description
Die Erfindung betrifft eine Pumpe mit einer Schneideinrichtung zum Fördern eines Fördermediums, das durch Verunreinigungen, Dickstoffe u. dgl. belastet ist, mit einem in einem Pumpengehäuse drehgelagerten und abgedichtet geführten, rotierenden Pumpenlaufrad, an dem ein oder mehrere Schneidmesser der Schneideinrichtung angeordnet sind, Schneidmesser und Pumpenlaufrad zusammen angetrieben sind und das Pumpenlaufrad einen hohl geformten, im Inneren die Medienströmung führenden, nach außen in das Medium hineinragenden rotationsförmig symmetrischen Aufbau aufweist, an dem oder in dem die mitrotierenden Schneidmesser angebracht sind.The invention relates to a pump with a cutting device for conveying a Pumped medium, which is caused by impurities, thick matter and. Like. is burdened with a in a pump housing rotatably and sealed guided, rotating Pump impeller on which one or more cutting blades of the cutting device are arranged, cutting blade and pump impeller driven together are and the pump impeller a hollow, the media flow inside leading, rotationally symmetrical protruding outward into the medium Has structure, on or in which the rotating cutting knife attached are.
Eine derartige Pumpe (DE 44 38 841 C1) gestattet, die Zerkleinerung von Stückgut oder die Verdünnung von zähe Stoffe enthaltenden Flüssigkeiten schon am Eintritt. Das oder die rotierenden Schneidmesser sind formschlüssig oder kraftschlüssig mit dem Pumpenlaufrad verbunden und können als Fortbildung des Pumpenlaufrad-Einlaufes verstanden werden. Der Antrieb und die Drehgeschwindigkeit des Pumpenlaufrades und der Schneidmesser sind somit gleich. Hierbei treten keine Verengungen im Pumpenlaufrad-Zulauf auf und es besteht kein störender Einfluß durch eine Antriebswelle. Das Fördergut bzw. Fördermedium kann hinter dem rotierenden Schneidmesser ungehindert dem Pumpenlaufrad zuströmen und eine Umschlingung einer Welle oder einer verlängerten Pumpenlaufradnabe entfällt. Such a pump (DE 44 38 841 C1) allows the comminution of piece goods or the dilution of liquids containing viscous substances at the entrance. The rotating cutting knife (s) are positive or non-positive with connected to the pump impeller and can be a further training of the pump impeller inlet be understood. The drive and speed of rotation of the pump impeller and the cutting knife are therefore the same. There are no constrictions here in the pump impeller inlet and there is no disruptive influence from a drive shaft. The material to be conveyed or the conveyed medium can be behind the rotating one Cutting knife flow freely to the pump impeller and a loop a shaft or an extended pump impeller hub is not required.
Dennoch ist die Anordnung, die Wirkung und die Wartung der Schneideinrichtung Voraussetzung für einen störungsfreien Lauf der Pumpe.Nevertheless, the arrangement, the effect and the maintenance of the cutting device Requirement for trouble-free running of the pump.
Es ist ferner bekannt ( CH - 423 489), einem in Strömungsrichtung mit Schneidkanälen versehenen Pumpenlaufrad ein Schneidstück vorzuordnen, das federnd angedrückt wird und damit bei einem ungünstig zu schneidenden Stückgut ausweichen kann. Die Schneidkanäle lassen jedoch eine größtmögliche Strömung nicht zu und das vorgeordnete Schneidstück deckt die Öffnungen der Schneidkanäle nur noch weiter ab und trägt nicht zu einer Vergrößerung der Volumenströme bei.It is also known (CH-423 489), a flow direction with cutting channels provided pump impeller a cutting piece, which is pressed resiliently and thus avoid a piece of goods that is difficult to cut can. However, the cutting channels do not allow the greatest possible flow and the upstream cutting piece only covers the openings of the cutting channels further and does not contribute to an increase in the volume flows.
Der Erfindung liegt die Aufgabe zugrunde, bei einem Pumpenlaufrad, das einen in das anzusaugende Medium ragenden Aufbau besitzt, die Anordnung, die Wirkung und die Wartung der Schneideinrichtung zu verbessern.The invention has for its object in a pump impeller that a the medium to be sucked up has a structure, the arrangement, the effect and improve the maintenance of the cutter.
Die gestellte Aufgabe wird bei der eingangs zugrundegelegten Ausbildung dadurch gelöst, daß die in der kegelförmigen Fläche der feststehenden Gegenmesserhaube liegenden Gegenschneidmesser durch radial auf der Konusfläche verlaufende Ausnehmungen in der kegelförmigen Gegenmesserhaube gebildet sind und daß die Schneidmesser am Pumpenlaufrad unter einem Winkel zur Drehrichtung und mit zunehmendem Radialabstand vom Zentrum nach außen, in Drehrichtung zurückbleibend geformt sind. Ein Hauptvorteil dieser Ausbildung besteht in der Nachschleifmöglichkeit von Schneidmesser und Gegenschneidmesser ohne eine nachteilige Schneidspaltvergrößerung. Sodann wird durch die innenliegenden Messerschneiden die Saugwirkung des Pumpeneinlaufs verstärkt. Ferner wird um die Schneideinrichtung eine rotierende Strömung bewirkt, die zu einer Verwirbelung des Fördergutes führt, was sich positiv auf das Aufbrechen einer vorhandenen Schwimmschlammdecke, z.B. in Hebeanlagen, auswirkt. This poses the task in the initial training solved that in the conical surface of the fixed counter knife hood lying counter-cutting knife through recesses running radially on the cone surface are formed in the conical counter knife hood and that the Cutting knife on the pump impeller at an angle to the direction of rotation and with increasing radial distance from the center to the outside, lagging in the direction of rotation are shaped. A main advantage of this training is the possibility of regrinding of cutting knife and counter-cutting knife without an adverse Cutting gap enlargement. Then through the inside knife edges the suction effect of the pump inlet is increased. Furthermore, the Cutting device causes a rotating flow, which leads to a swirling of the Conveyed goods leads, which has a positive effect on breaking up an existing one Floating mud blanket, e.g. in lifting systems.
Eine dem Volumenstrom entgegenkommende Vergrößerung des Pumpeneinlaufs wird nach weiteren Merkmalen dadurch erzielt, daß die Ausnehmungen etwa rechteckförmig sind und konisch zur Richtung der Mittellängsachse der Pumpe verlaufen.An enlargement of the pump inlet that accommodates the volume flow is achieved according to further features in that the recesses are approximately rectangular are and are tapered to the direction of the central longitudinal axis of the pump.
Ferner können Breite und Länge der Ausnehmungen auf die Größe des entstehenden Schneidgutes abgestimmt sein. Die Ausbildung des Pumpenlaufrades als nach außen in das Medium ragenden Aufbau bietet hierzu einen Spielraum, der bei bekannten Schneideinrichtungen nicht vorhanden ist.Furthermore, the width and length of the recesses can be the size of the resulting Material to be cut. The formation of the pump impeller as after The structure protruding outside into the medium offers a scope for this which is known in the art Cutting devices is not available.
Zusätzlich ist vorgesehen, daß Breite und Länge bzw. Form der Ausnehmungen auf die angestrebte Strömungsgeschwindigkeit abgestimmt sind.In addition, it is provided that the width and length or shape of the recesses the desired flow rate are coordinated.
Nach eingehenden Versuchen wurde ermittelt, daß der Winkel der Schneidmesser am Pumpenlaufrad gemessen an einer Tangente und der Schneidkante einer Ausnehmung etwa 18 - 40° beträgt und damit günstige Werte für die Strömungsführung, den Volumenstrom und die Zerkleinerung von Stückgut erbringt.After extensive testing, it was determined that the angle of the cutting knife on the pump impeller measured at a tangent and the cutting edge of a recess is around 18 - 40 ° and thus favorable values for the flow guidance, the volume flow and the crushing of piece goods.
Hierbei ist es weiter vorteilhaft, daß die auf dem Kegelmantel des Pumpenlaufrades liegenden Schneidmesser gebogen geformt sind. Diese Maßnahme trägt ebenfalls zu einem Drehimpuls auf die Strömung bei, wodurch die Saugwirkung des Pumpenlaufrades verstärkt wird und die um die Schneideinrichtung rotierende Strömung entstehen läßt.It is further advantageous that the on the cone of the pump impeller lying cutting knives are curved. This measure also bears to an angular momentum on the flow, thereby reducing the suction of the pump impeller is amplified and the flow rotating around the cutting device creates.
Die angestrebte Rotationswirkung in der Strömung wird z.B. dadurch erzeugt, daß die Bogenform der Schneidmesser etwa dem Verlauf von Zähnen bei Spiralkegelrädern entspricht.The desired rotational effect in the flow is e.g. generated by the fact that the arc shape of the cutting knives, for example, the course of teeth on spiral bevel gears corresponds.
Um eine völlig gleichbleibende Schneidbewegung der Messer zu vermeiden, ist weiterhin vorgesehen, daß der Abstand am Umfang aufeinanderfolgender Schneidmesser ungleich groß ist. In order to avoid a completely constant cutting movement of the knives, further provided that the distance on the circumference of successive cutting knives is unequal in size.
Eine ungleiche Schneidabstandszeit, die in Takten wirkt, wird außerdem dadurch erzielt, indem jeweils zwei oder mehr aufeinanderfolgende Schneidmesser eine Gruppe bilden, die einen kleineren Abstand unter sich einhalten als der Abstand zur nächsten Gruppe beträgt.This also results in an uneven cutting spacing time, which acts in cycles achieved by two or more successive cutting knives one Form a group that is smaller than the distance to each other next group.
Die Bildung einer für den Schneidvorgang geeigneten Führung für die Strömung kann ferner dadurch verbessert werden, daß bei einem nach unten ragenden Pumpenlaufrad und einer nach unten ragenden, feststehenden Gegenmesserhaube an dem Pumpengehäuse eine Schneidglocke mit Befestigungsflansch für eine Anschlußrohrleitung vorgesehen ist, die die feststehende Gegenmesserhaube umgibt und einen strömungsgünstigen Einlauf an der Gegenmesserhaube bildet.The formation of a flow guide suitable for the cutting process can also be improved by the fact that with a pump impeller projecting downwards and a fixed counter knife hood protruding downwards the pump housing a cutting bell with a mounting flange for a connecting pipeline is provided, which surrounds the fixed counter knife hood and forms a streamlined inlet on the counter knife hood.
In Weiterbildung ist der Befestigungsflansch Teil eines geschlossenen Rohrleitungssystems.In a further development, the fastening flange is part of a closed piping system.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and is in following described in more detail.
Es zeigen:
- Fig. 1
- einen axialen Querschnitt durch eine Pumpe mit Schneideinrichtung und
- Fig. 2
- eine Abwicklung einer Kegelmantelfläche mit feststehender Gegenmesserhaube und rotierenden, innen liegenden Gegenschneidmessern.
- Fig. 1
- an axial cross section through a pump with cutting device and
- Fig. 2
- a development of a surface of a cone with a fixed counter knife cover and rotating counter blades on the inside.
In einem Pumpengehäuse 1 ist im Innern 2a ein rotierendes Pumpenlaufrad 2 drehgelagert
und abgedichtet geführt. Eine Schneideinrichtung 3 besteht aus am Pumpenlaufrad
2 befestigten Schneidmessern 4, deren Gegenschneidmesser 5 an einer
feststehenden Gegenmesserhaube 6 gebildet sind. In a
Die Schneidmesser 4 und das Pumpenlaufrad 2 sind gemeinsam über eine Welle 7
angetrieben. Das Pumpenlaufrad 2 sowie die feststehende Gegenmesserhaube 6
bilden mit einem inneren Schneidspaltabstand einen hohl geformten, im Inneren 2a
die Medienströmung führenden, nach außen in das Medium hineinragenden rotationsförmig
symmetrischen Aufbau 8.The
In der kegelförmigen Fläche 6a der feststehenden Gegenmesserhaube 6 sind Gegenschneidmesser
5 durch radial auf der Konusfläche 6a verlaufende Ausnehmungen
9 in der Wanddicke der kegelförmigen Gegenmesserhaube 6 gebildet und die
Schneidmesser 4 sind am Pumpenlaufrad 2 unter einem Winkel 10 zur Drehrichtung
11 und mit zunehmendem Radialabstand 12 vom Zentrum 13 nach außen, in Drehrichtung
11 zurückbleibend geformt. Die Ausnehmungen 9 sind etwa rechteckförmig
ausgeschnitten und verlaufen konisch zur Richtung der Mittellängsachse 14. Die
Breite 15 und die Länge 16 der Ausnehmungen, sowie ihre äußere Form, sind auf
die Größe des entstehenden Schneidgutes abgestimmt. Ebenso sind Breite 15, Länge
16 bzw. die Form der Ausnehmungen 9 auf die angestrebte Strömungsgeschwindigkeit
abgestimmt.There are counter-cutting knives in the conical surface 6a of the fixed
Der Winkel 10 der Schneidmesser 4 am Pumpenlaufrad 2 beträgt gemessen zwischen
einer Tangente 17 und der Schneidkante 9a einer Ausnehmung 9 etwa 18 bis
40°.The
Wie aus Fig. 2 ersichtlich ist, sind die auf dem Kegelmantel 2b des Pumpenlaufrades
2 liegenden Schneidmesser 4 gebogen geformt, d.h. sie weisen eine Bogenform 18
auf, die z.B. etwa dem Verlauf von Zähnen bei Spiralkegelzahnrädern entsprechen
könnte. Der Abstand 19 am Umfang aufeinanderfolgender Schneidmesser 4 ist ersichtlich
ungleich groß. Jeweils zwei oder mehr aufeinanderfolgende Schneidmesser
4 bilden eine Gruppe 20 und halten einen kleineren Abstand 19 unter sich ein als der
Abstand 21 zur nächsten Gruppe 23 beträgt. As can be seen from Fig. 2, they are on the cone jacket 2b of the
Bei einem nach unten ragenden Pumpenlaufrad 2 (Fig. 1) und einer nach unten ragenden,
feststehenden Gegenmesserhaube 6 ist an dem Pumpengehäuse 1 eine
Schneidglocke 24 mit Befestigungsflansch 25 für eine Anschlußrohrleitung 26 vorgesehen,
die die feststehende Gegenmesserhaube 6 umgibt und damit einen strömungsgünstigen
Einlauf 27 an der Gegenmesserhaube 6 bildet.With a
Der Befestigungsflansch 25 kann Teil eines geschlossenen Rohrleitungssystems
(nicht dargestellt) sein. The
- 11
- PumpengehäusePump housing
- 22nd
- PumpenlaufradPump impeller
- 2a2a
- Pumpenlaufrad-InneresPump impeller inside
- 2b2 B
- KegelmantelCone jacket
- 33rd
- SchneideinrichtungCutting device
- 44th
- SchneidmesserCutting knife
- 55
- GegenschneidmesserCounter cutting knife
- 66
- GegenmesserhaubeCounter knife hood
- 6a6a
- kegelförmige Flächeconical surface
- 77
- Wellewave
- 88th
- Aufbauconstruction
- 99
- AusnehmungenRecesses
- 9a9a
- SchneidkanteCutting edge
- 1010th
- Winkelangle
- 1111
- DrehrichtungDirection of rotation
- 1212th
- RadialabstandRadial distance
- 1313
- Zentrumcenter
- 1414
- MittellängsachseCentral longitudinal axis
- 1515
- Breitewidth
- 1616
- Längelength
- 1717th
- Tangentetangent
- 1818th
- BogenformArch shape
- 1919th
- Abstanddistance
- 2020th
- Gruppegroup
- 2121
- Abstanddistance
- 2222
- ---
- 2323
- nächste Gruppenext group
- 2424th
- SchneidglockeCutting bell
- 2525th
- BefestigungsflanschMounting flange
- 2626
- AnschlußrohrleitungConnecting pipe
- 2727
- Einlaufenema
Claims (11)
dadurch gekennzeichnet,
daß die in der kegelförmigen Fläche (6a) der feststehenden Gegenmesserhaube (6) liegenden Gegenschneidmesser (5) durch radial auf der Konusfläche (6a) verlaufende Ausnehmungen (9) in der kegelförmigen Gegenmesserhaube (6) gebildet sind und daß die Schneidmesser (4) am Pumpenlaufrad (2) unter einem Winkel (10) zur Drehrichtung (11) und mit zunehmendem Radialabstand (12) vom Zentrum (13) nach außen, in Drehrichtung (11) zurückbleibend geformt sind.Pump with a cutting device for conveying a medium that is contaminated by impurities, thick materials and. is loaded with a rotary pump impeller which is rotatably mounted and sealed in a pump housing and on which one or more cutting blades of the cutting device are arranged, the cutting blade and the pump impeller are driven together and the pump impeller has a hollow, outwardly leading media flow has a rotationally symmetrical structure protruding into the medium, on or in which the rotating cutting knives are attached,
characterized,
that the counter-cutting knives (5) lying in the conical surface (6a) of the fixed counter-knife hood (6) are formed by recesses (9) in the conical counter-knife hood (6) running radially on the conical surface (6a) and that the cutting knives (4) on Pump impeller (2) are formed at an angle (10) to the direction of rotation (11) and with increasing radial distance (12) from the center (13) to the outside, in the direction of rotation (11).
dadurch gekennzeichnet,
daß die Ausnehmungen (9) etwa rechteckförmig sind und konisch zur Richtung der Mittellängsachse (14) der Pumpe verlaufen. Pump according to claim 1,
characterized,
that the recesses (9) are approximately rectangular and are conical to the direction of the central longitudinal axis (14) of the pump.
dadurch gekennzeichnet,
daß Breite (15) und Länge (16) der Ausnehmungen (9) auf die Größe des entstehenden Schneidgutes abgestimmt sind.Pump according to one of claims 1 and 2,
characterized,
that the width (15) and length (16) of the recesses (9) are matched to the size of the material to be cut.
dadurch gekennzeichnet,
daß Breite (15) und Länge (16) bzw. Form der Ausnehmungen (9) auf die angestrebte Strömungsgeschwindigkeit abgestimmt sind.Pump according to one of claims 1 to 3,
characterized,
that width (15) and length (16) or shape of the recesses (9) are matched to the desired flow rate.
dadurch gekennzeichnet,
daß der Winkel (10) der Schneidmesser (4) am Pumpenlaufrad (2) gemessen an einer Tangente (17) und der Schneidkante (9a) einer Ausnehmung (9) etwa 18-40° beträgt.Pump according to one of claims 1 to 4,
characterized,
that the angle (10) of the cutting knife (4) on the pump impeller (2) measured at a tangent (17) and the cutting edge (9a) of a recess (9) is approximately 18-40 °.
dadurch gekennzeichnet,
daß die auf dem Kegelmantel (2b) des Pumpenlaufrades (2) liegenden Schneidmesser (4) gebogen geformt sind.Pump according to one of claims 1 to 5,
characterized,
that the cutting blades (4) lying on the conical jacket (2b) of the pump impeller (2) are curved.
dadurch gekennzeichnet,
daß die Bogenform (18) der Schneidmesser (4) etwa dem Verlauf von Zähnen bei Spiralkegelzahnrädern entspricht. Pump according to one of claims 1 to 6,
characterized,
that the arc shape (18) of the cutting knife (4) corresponds approximately to the course of teeth in spiral bevel gears.
dadurch gekennzeichnet,
daß der Abstand (19) am Umfang aufeinanderfolgender Schneidmesser (4) ungleich groß ist.Pump according to one of claims 1 to 7,
characterized,
that the distance (19) on the circumference of successive cutting blades (4) is not the same size.
dadurch gekennzeichnet,
daß jeweils zwei oder mehr aufeinanderfolgende Schneidmesser (4) eine Gruppe (20) bilden, die einen kleineren Abstand (19) unter sich einhalten als der Abstand (21) zur nächsten Gruppe (23) beträgt.Pump according to claim 8,
characterized,
that two or more successive cutting knives (4) form a group (20) which maintain a smaller distance (19) between them than the distance (21) to the next group (23).
dadurch gekennzeichnet,
daß bei einem nach unten ragenden Pumpenlaufrad (2) und einer nach unten ragenden feststehenden Gegenmesserhaube (6) an dem Pumpengehäuse (1) eine Schneidglocke (24) mit Befestigungsflansch (25) für eine Anschlußrohrleitung (26) vorgesehen ist, die die feststehende Gegenmesserhaube (6) umgibt und einen strömungsgünstigen Einlauf (27) an der Gegenmesserhaube (6) bildet.Pump according to one of claims 1 to 9,
characterized,
that with a downwardly projecting pump impeller (2) and a downwardly projecting counter knife hood (6) on the pump housing (1), a cutting bell (24) with a mounting flange (25) is provided for a connecting pipe (26) which connects the fixed counter knife hood ( 6) surrounds and forms a streamlined inlet (27) on the counter knife hood (6).
dadurch gekennzeichnet,
daß der Befestigungsflansch (25) Teil eines geschlossenen Rohrleitungssystems ist.Pump according to one of claims 1 to 10,
characterized,
that the mounting flange (25) is part of a closed piping system.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK97118599T DK0911527T3 (en) | 1997-10-25 | 1997-10-25 | Pump with a cutting device |
| PT97118599T PT911527E (en) | 1997-10-25 | 1997-10-25 | PUMP WITH A CUTTING MECHANISM |
| AT97118599T ATE199275T1 (en) | 1997-10-25 | 1997-10-25 | PUMP WITH A CUTTER |
| EP97118599A EP0911527B1 (en) | 1997-10-25 | 1997-10-25 | Pump with a cutting device |
| ES97118599T ES2155647T3 (en) | 1997-10-25 | 1997-10-25 | PUMP WITH CUTTING DEVICE. |
| DE59703018T DE59703018D1 (en) | 1997-10-25 | 1997-10-25 | Pump with a cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97118599A EP0911527B1 (en) | 1997-10-25 | 1997-10-25 | Pump with a cutting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0911527A1 true EP0911527A1 (en) | 1999-04-28 |
| EP0911527B1 EP0911527B1 (en) | 2001-02-21 |
Family
ID=8227523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97118599A Expired - Lifetime EP0911527B1 (en) | 1997-10-25 | 1997-10-25 | Pump with a cutting device |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0911527B1 (en) |
| AT (1) | ATE199275T1 (en) |
| DE (1) | DE59703018D1 (en) |
| DK (1) | DK0911527T3 (en) |
| ES (1) | ES2155647T3 (en) |
| PT (1) | PT911527E (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1335134A1 (en) * | 2002-02-04 | 2003-08-13 | Ching-Yuan Chiang | Motor and its blade unit |
| DE102004007739A1 (en) * | 2004-02-16 | 2005-08-25 | Wilo Ag | Cutting tool for centrifugal pump, has convex lateral surface located opposite concave fixed counter surface |
| US7390179B2 (en) | 2004-12-21 | 2008-06-24 | Emerson Climate Technologies, Inc. | Scroll machine having counterweights with changeable cavity |
| CN102889248A (en) * | 2011-06-15 | 2013-01-23 | Ksb股份公司 | Centrifugal pump with integrated cutting machine |
| CN104888907A (en) * | 2015-04-15 | 2015-09-09 | 江苏大学 | Cutter head having radial cutting and stirring functions used for pump |
| CN110541830A (en) * | 2019-08-28 | 2019-12-06 | 中国计量大学 | Self-suction sewage pump with double-opening ring seal |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011112580B4 (en) | 2011-09-08 | 2014-03-20 | Schmalenberger Gmbh & Co. Kg | Self-priming pump with cutting unit |
| CN103557154B (en) * | 2013-11-21 | 2016-04-13 | 重庆宏美科技有限公司 | A kind of water pump machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB608741A (en) * | 1946-05-09 | 1948-09-20 | Wilfred Nathan Waterworth Pier | Disintegrating unit for sewage or the like |
| CH411584A (en) * | 1964-07-10 | 1966-04-15 | Kolb Eugen Ag | Centrifugal pump for pumping contaminated liquids |
| CH423489A (en) | 1962-10-12 | 1966-10-31 | Schade Harald Ing Dr | Centrifugal pump for contaminated liquids with crushing device |
| DE3340295A1 (en) * | 1983-11-08 | 1985-05-15 | Albert 5204 Lohmar Blum | Pump for the delivery of liquids intermingled with lumpy contaminants |
| DE4438841C1 (en) | 1994-11-02 | 1996-02-08 | Orpu Gmbh | Pump having cutting blades |
-
1997
- 1997-10-25 ES ES97118599T patent/ES2155647T3/en not_active Expired - Lifetime
- 1997-10-25 PT PT97118599T patent/PT911527E/en unknown
- 1997-10-25 DK DK97118599T patent/DK0911527T3/en active
- 1997-10-25 DE DE59703018T patent/DE59703018D1/en not_active Expired - Fee Related
- 1997-10-25 AT AT97118599T patent/ATE199275T1/en not_active IP Right Cessation
- 1997-10-25 EP EP97118599A patent/EP0911527B1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB608741A (en) * | 1946-05-09 | 1948-09-20 | Wilfred Nathan Waterworth Pier | Disintegrating unit for sewage or the like |
| CH423489A (en) | 1962-10-12 | 1966-10-31 | Schade Harald Ing Dr | Centrifugal pump for contaminated liquids with crushing device |
| CH411584A (en) * | 1964-07-10 | 1966-04-15 | Kolb Eugen Ag | Centrifugal pump for pumping contaminated liquids |
| DE3340295A1 (en) * | 1983-11-08 | 1985-05-15 | Albert 5204 Lohmar Blum | Pump for the delivery of liquids intermingled with lumpy contaminants |
| DE4438841C1 (en) | 1994-11-02 | 1996-02-08 | Orpu Gmbh | Pump having cutting blades |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1335134A1 (en) * | 2002-02-04 | 2003-08-13 | Ching-Yuan Chiang | Motor and its blade unit |
| DE102004007739A1 (en) * | 2004-02-16 | 2005-08-25 | Wilo Ag | Cutting tool for centrifugal pump, has convex lateral surface located opposite concave fixed counter surface |
| US7390179B2 (en) | 2004-12-21 | 2008-06-24 | Emerson Climate Technologies, Inc. | Scroll machine having counterweights with changeable cavity |
| CN102889248A (en) * | 2011-06-15 | 2013-01-23 | Ksb股份公司 | Centrifugal pump with integrated cutting machine |
| CN104888907A (en) * | 2015-04-15 | 2015-09-09 | 江苏大学 | Cutter head having radial cutting and stirring functions used for pump |
| CN110541830A (en) * | 2019-08-28 | 2019-12-06 | 中国计量大学 | Self-suction sewage pump with double-opening ring seal |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59703018D1 (en) | 2001-03-29 |
| ATE199275T1 (en) | 2001-03-15 |
| EP0911527B1 (en) | 2001-02-21 |
| PT911527E (en) | 2001-07-31 |
| ES2155647T3 (en) | 2001-05-16 |
| DK0911527T3 (en) | 2001-06-11 |
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