EP0704627B1 - Submersible pump for coarsely polluted liquids - Google Patents

Submersible pump for coarsely polluted liquids Download PDF

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Publication number
EP0704627B1
EP0704627B1 EP95113954A EP95113954A EP0704627B1 EP 0704627 B1 EP0704627 B1 EP 0704627B1 EP 95113954 A EP95113954 A EP 95113954A EP 95113954 A EP95113954 A EP 95113954A EP 0704627 B1 EP0704627 B1 EP 0704627B1
Authority
EP
European Patent Office
Prior art keywords
pump
space
jacket
rinsing
submersible
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
Application number
EP95113954A
Other languages
German (de)
French (fr)
Other versions
EP0704627A1 (en
Inventor
Klaus Dr. Wagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB AG
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KSB AG
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Filing date
Publication date
Application filed by KSB AG filed Critical KSB AG
Publication of EP0704627A1 publication Critical patent/EP0704627A1/en
Application granted granted Critical
Publication of EP0704627B1 publication Critical patent/EP0704627B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/604—Vortex non-clogging type pumps

Definitions

  • the invention relates to a submersible pump for conveying fluids, which are interspersed with deposits, with a tangential pressure port emanating from a pump chamber and a jacket space surrounding the motor of the submersible pump, through which the conveying liquid flows and which serves to cool the motor and which is connected to the pump chamber and which has a flushing connection which is arranged at the end of the jacket space facing away from the pump and is to be connected to an external liquid source.
  • Such a pump is known from DE-A-15 28 862.
  • a wastewater pump is described, from the pump chamber of which conveying liquid reaches the jacket space surrounding the electric motor.
  • a cooling circuit in the jacket space is maintained by back vanes on the pump impeller.
  • a common flushing of the jacket and pump space is not possible due to the sealing gap.
  • the jacket space In order to enable the jacket space to be flushed, the jacket space must be equipped with a further connection which serves to discharge the flushing liquid.
  • pumps for heavily contaminated liquids are usually equipped with free-flow impellers and tangential pressure ports.
  • cleaning flushing of such pumps has only been possible when removed.
  • the higher seated motor or its cooling jacket is only reached indirectly by a flushing flow introduced into the pump chamber.
  • Deposits in this area which is important for cooling, are therefore often only incompletely removed by rinsing.
  • Pump housing with vertical discharge nozzle which is the preference of the better Having the rinsing area flushable, are not used due to the risk of clogging with coarsely contaminated liquids
  • the object of the invention is to provide a submersible pump which, with a low risk of blockage, offers the possibility of simultaneous intensive rinsing of the pump and the jacket space without requiring the submersible pump to be removed.
  • this object is achieved according to the invention in that the jacket space is connected to the pump space in such a way that a flushing flow introduced via the flushing connection is discharged via the pump space.
  • the invention combines, as it were, two different types of submersible pumps, those with tangential and those with vertical pressure ports, to form a new, third type. This even gives the possibility of a standardized housing for both types, e.g. for waste water and wastewater pumps.
  • a closure cap provided on the flushing connection with a ventilation system. This can be easily cleaned in the event of any clogging after unscrewing the cap.
  • the invention is explained in more detail using an exemplary embodiment.
  • the drawing shows a sectional view of a vertically arranged submersible pump according to the invention.
  • the submersible pump equipped with a free-flow impeller 1 is driven by an electric motor 2.
  • the submersible motor pump has an inlet 3, a pump chamber 4 and a pressure port 5.
  • the electric motor 2 is surrounded by a jacket chamber 6, which is connected to the pump chamber 4 via a plurality of large-area openings (not shown here).
  • the jacket space 6 is filled with liquid that is used to continuously dissipate heat generated in the electric motor 2
  • a flushing connection 7 is arranged, which is closed by a screwed-on closure cap 8.
  • the Cap 8 is provided with an opening 9 serving to vent the interior of the submersible pump.
  • the free-flow impeller 1 draws delivery liquid through the inlet 3 into the pump chamber 4 and delivers it via the pressure nozzle 5 into an area not shown here.
  • the pressure exerted on the pumped liquid via the free-flow impeller 1 also leads to the jacket space 6 being filled with pumped liquid.
  • the air present in the jacket space 6 is discharged through the opening 9 in the closure cap 8.
  • Part of the heat generated by the electric motor 2 is given off through the wall of the pump to the surrounding liquid. This conveying liquid is in constant motion due to an internal flow, so that the heat absorbed by it is released to the outside via the wall of the submersible pump housing and into the pump chamber 4 via an exchange flow.
  • the conveying liquid contains impurities, deposits form over time on the walls delimiting the jacket space 6, that is, also on the wall of the electric motor 2, which is important for cooling connected or plugged in, via which pressurized water free of impurities is introduced into the jacket space 6.
  • the rinsing flow conducted through the jacket space 6 releases existing deposits and removes them via the pump space 4 and the inlet 3.
  • the connection of the pressure port 5 with a pressure line - not shown here - does not have to be released for this flushing process; the pump can remain in its installation position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine Tauchmotorpumpe für Förderflüssigkeiten, die mit sich ablagernden Bestandteilen durchsetzt sind, mit einem von einem Pumpenraum ausgehenden tangentialen Druckstutzen und einem den Motor der Tauchmotorpumpe umschließenden, von der Förderflüssigkeit durchströmten, der Kühlung des Motors dienenden Mantelraum, der mit dem Pumpenraum verbunden ist und der einen am pumpenabgewandten Ende des Mantelraumes angeordneten, mit einer externen Flüssigkeitsquelle zu verbindenden Spülanschluß besitzt.The invention relates to a submersible pump for conveying fluids, which are interspersed with deposits, with a tangential pressure port emanating from a pump chamber and a jacket space surrounding the motor of the submersible pump, through which the conveying liquid flows and which serves to cool the motor and which is connected to the pump chamber and which has a flushing connection which is arranged at the end of the jacket space facing away from the pump and is to be connected to an external liquid source.

Eine derartige Pumpe ist bekannt durch die DE-A-15 28 862. In der genannten Schrift wird eine Abwasserpumpe beschrieben, aus deren Pumpenraum Förderflüssigkeit in den den Elektromotor umgebenden Mantelraum gelangt. Durch Rückenschaufeln am Pumpenlaufrad wird ein Kühlkreislauf im Mantelraum aufrechterhalten. Zwischen dem Pumpenraum und dem Mantelraum befindet sich ein Dichtungsspalt, der den Zutritt von Verunreinigungen verhindern soll. Eine gemeinsame Spülung von Mantel- und Pumpenraum ist wegen des Dichtungsspaltes nicht möglich. Um eine Spülung des Mantelraumes zu ermöglichen, muß der Mantelraum mit einem weiteren, der Abführung der Spülflüssigkeit dienenden Anschluß ausgestattet werden.Such a pump is known from DE-A-15 28 862. In the cited document, a wastewater pump is described, from the pump chamber of which conveying liquid reaches the jacket space surrounding the electric motor. A cooling circuit in the jacket space is maintained by back vanes on the pump impeller. There is a sealing gap between the pump chamber and the jacket chamber, which is to prevent the entry of contaminants. A common flushing of the jacket and pump space is not possible due to the sealing gap. In order to enable the jacket space to be flushed, the jacket space must be equipped with a further connection which serves to discharge the flushing liquid.

Bei Tauchmotorpumpen für grob verunreinigte Flüssigkeiten erfordert die Aufrechterhaltung der Betriebssicherheit aber auch von Zeit zu Zeit eine Reinigung des Pumpeninnenraumes von Ablagerungen. Diese Reinigung kann in zweckmäßiger Weise ebenfalls durch eine Spülung erfolgen. Für transportable, nur zeitweise eingesetzte Pumpen ist eine gründliche Spülung vor deren Einlagerung zu empfehlen.In the case of submersible pumps for coarsely contaminated liquids, maintaining operational safety also requires that the inside of the pump is cleaned of deposits from time to time. This cleaning can also be conveniently carried out by rinsing. For portable pumps that are only used temporarily, thorough flushing is recommended before storing them.

Aus Gründen der Verstopfungsgefahr sind Pumpen für stark verunreinigte Flüssigkeiten in aller Regel mit Freistromlaufrädern und tangentialen Druckstutzen ausgestattet. Eine Reinigungsspülung solcher Pumpen ist bisher nur im ausgebauten Zustand möglich. Der höher sitzende Motor bzw. dessen Kühlmantel wird allerdings durch einen in den Pumpenraum eingeleiteten Spülstrom nur indirekt erreicht. Ablagerungen in diesem für die Kühlung wichtigen Bereich werden daher oft nur unvollständig durch eine Spülung beseitigt. Pumpengehäuse mit vertikalem Druckstutzen, die den Vorzug der besseren Durchspülbarkeit des Mantelraumes besäßen, kommen wegen Verstopfungsgefahr bei grob verunreinigten Flüssigkeiten nicht zum EinsatzIn order to avoid the risk of clogging, pumps for heavily contaminated liquids are usually equipped with free-flow impellers and tangential pressure ports. Up to now, cleaning flushing of such pumps has only been possible when removed. The higher seated motor or its cooling jacket, however, is only reached indirectly by a flushing flow introduced into the pump chamber. Deposits in this area, which is important for cooling, are therefore often only incompletely removed by rinsing. Pump housing with vertical discharge nozzle, which is the preference of the better Having the rinsing area flushable, are not used due to the risk of clogging with coarsely contaminated liquids

Aufgabe der Erfindung ist es, eine Tauchmotorpumpe zu schaffen, die bei geringer Verstopfungsgefahr die Möglichkeit einer gleichzeitigen intensiven Spülung des Pumpen- und des Mantelraumes bietet, ohne daß sie den Ausbau der Tauchmotorpumpe notwendig macht.The object of the invention is to provide a submersible pump which, with a low risk of blockage, offers the possibility of simultaneous intensive rinsing of the pump and the jacket space without requiring the submersible pump to be removed.

Ausgehend von einer Tauchmotorpumpe der eingangs genannten Art wird diese Aufgabe erfindungsgemäß dadurch gelöst, daß der Mantelraum mit dem Pumpenraum derart verbunden ist, daß ein über den Spülanschluß eingeleiteter Spülstrom über den Pumpenraum abgeleitet wird.Starting from a submersible motor pump of the type mentioned at the outset, this object is achieved according to the invention in that the jacket space is connected to the pump space in such a way that a flushing flow introduced via the flushing connection is discharged via the pump space.

Die Erfindung verbindet gewissermaßen zwei verschiedene Arten von Tauchmotorpumpen, solche mit tangentialem und solche mit vertikalem Druckstutzen, zu einer neuen, dritten Art. Dabei ergibt sich sogar noch die Möglichkeit, ein standardisiertes Gehäuse für beide Arten, also z.B. für Schmutzwasser- und Abwasserpumpen, zu schaffen.The invention combines, as it were, two different types of submersible pumps, those with tangential and those with vertical pressure ports, to form a new, third type. This even gives the possibility of a standardized housing for both types, e.g. for waste water and wastewater pumps.

Als vorteilhafte Ausgestaltung der Erfindung wird vorgeschlagen, eine am Spülanschluß vorgesehene Verschlußkappe mit einem Entlüftungssystem auszustatten. Dieses läßt sich bei einem etwaigen Verstopfen nach einem Abschrauben der Verschlußkappe in einfacher Weise reinigen.As an advantageous embodiment of the invention, it is proposed to equip a closure cap provided on the flushing connection with a ventilation system. This can be easily cleaned in the event of any clogging after unscrewing the cap.

Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Die Zeichnung zeigt eine Schnittdarstellung einer vertikal angeordneten Tauchmotorpumpe gemäß der Erfindung.The invention is explained in more detail using an exemplary embodiment. The drawing shows a sectional view of a vertically arranged submersible pump according to the invention.

Die mit einem Freistromlaufrad 1 ausgestattete Tauchmotorpumpe wird durch einen Elektromotor 2 angetrieben. Die Tauchmotorpumpe besitzt einen Einlaß 3, einen Pumpenraum 4 und einen Druckstutzen 5. Der Elektromotor 2 ist umgeben von einem Mantelraum 6, der über mehrere - hier nicht erkennbare - großflächige Öffnungen mit dem Pumpenraum 4 verbunden ist. Der Mantelraum 6 ist mit Förderflüssigkeit gefüllt, die der stetigen Abfuhr von im Elektromotor 2 entstehender Wärme dientThe submersible pump equipped with a free-flow impeller 1 is driven by an electric motor 2. The submersible motor pump has an inlet 3, a pump chamber 4 and a pressure port 5. The electric motor 2 is surrounded by a jacket chamber 6, which is connected to the pump chamber 4 via a plurality of large-area openings (not shown here). The jacket space 6 is filled with liquid that is used to continuously dissipate heat generated in the electric motor 2

Am pumpenabgewandten Ende des Mantelraumes 6 ist ein Spülanschluß 7 angeordnet, der durch eine aufgeschraubte Verschlußkappe 8 verschlossen wird. Die Verschlußkappe 8 ist mit einer der Entlüftung des Innenraumes der Tauchmotorpumpe dienenden Öffnung 9 versehen.At the end of the jacket space 6 facing away from the pump, a flushing connection 7 is arranged, which is closed by a screwed-on closure cap 8. The Cap 8 is provided with an opening 9 serving to vent the interior of the submersible pump.

Bei der Inbetriebnahme der Tauchmotorpumpe wird durch das Freistromlaufrad 1 Förderflüssigkeit über den Einlauf 3 in den Pumpenraum 4 gesaugt und über den Druckstutzen 5 in einen hier nicht dargestellten Bereich gefördert. Der über das Freistromlaufrad 1 auf die Förderflüssigkeit ausgeübte Druck führt außerdem dazu, daß der Mantelraum 6 mit Förderflüssigkeit gefüllt wird. Dabei wird die im Mantelraum 6 vorhandene Luft über die Öffnung 9 in der Verschlußkappe 8 abgeführt. Ein Teil der vom Elektromotor 2 erzeugten Wärme wird über dessen Wandung an die ihn umgebende Förderflüssigkeit abgegeben. Diese Förderflüssigkeit befindet sich aufgrund einer inneren Strömung in ständiger Bewegung, so daß die von ihr aufgenommene Wärme über die Wand des Tauchpumpengehäuses nach außen und über eine Austauschströmung in den Pumpenraum 4 abgegeben wird.When the submersible pump is put into operation, the free-flow impeller 1 draws delivery liquid through the inlet 3 into the pump chamber 4 and delivers it via the pressure nozzle 5 into an area not shown here. The pressure exerted on the pumped liquid via the free-flow impeller 1 also leads to the jacket space 6 being filled with pumped liquid. The air present in the jacket space 6 is discharged through the opening 9 in the closure cap 8. Part of the heat generated by the electric motor 2 is given off through the wall of the pump to the surrounding liquid. This conveying liquid is in constant motion due to an internal flow, so that the heat absorbed by it is released to the outside via the wall of the submersible pump housing and into the pump chamber 4 via an exchange flow.

Da die Förderflüssigkeit Verunreinigungen enthält, bilden sich mit der Zeit Ablagerungen an den den Mantelraum 6 begrenzenden Wänden, also auch an der für die Kühlung wichtigen Wand des Elektromotors 2. Zur Beseitigung dieser Ablagerungen wird nach einem Abschrauben der Verschlußkappe 8 an den Spülanschluß 7 ein Schlauch angeschlossen oder eingesteckt, über den unter Druck stehendes, von Verunreinigungen freies Wasser in den Mantelraum 6 eingeleitet wird. Die über den Mantelraum 6 geleitete Spülströmung löst vorhandene Ablagerungen und führt diese über den Pumpenraum 4 und den Einlauf 3 ab. Die Verbindung des Druckstutzens 5 mit einer - hier nicht dargestellten - Druckleitung muß für diesen Spülvorgang nicht gelöst werden; die Pumpe kann in ihrer Einbauposition verbleiben.Since the conveying liquid contains impurities, deposits form over time on the walls delimiting the jacket space 6, that is, also on the wall of the electric motor 2, which is important for cooling connected or plugged in, via which pressurized water free of impurities is introduced into the jacket space 6. The rinsing flow conducted through the jacket space 6 releases existing deposits and removes them via the pump space 4 and the inlet 3. The connection of the pressure port 5 with a pressure line - not shown here - does not have to be released for this flushing process; the pump can remain in its installation position.

Claims (2)

  1. Submersible motor pump for pumped liquids which are permeated with precipitating constituents, having a tangential pressure connection (5) emanating from a pump space (4) and a jacket space (6), which surrounds the motor (2) of the submersible motor pump, is flowed through by the pumped liquid, serves for cooling the motor (2), is connected to the pump space (4) and has a rinsing connection which is arranged at the end of the jacket space (6) averted from the pump and is to be connected to an external liquid source, characterized in that the jacket space (6) is connected to the pump space (4) in such a way that a rinsing flow introduced via the rinsing connection (7) is diverted via the pump space (4).
  2. Submersible motor pump according to Claim 1, characterized in that the rinsing connection (7) is provided with a closure cap (8) which is detachably mounted and is fitted with a venting system (9).
EP95113954A 1994-09-27 1995-09-06 Submersible pump for coarsely polluted liquids Expired - Lifetime EP0704627B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434461 1994-09-27
DE4434461A DE4434461A1 (en) 1994-09-27 1994-09-27 Submersible pump for coarsely contaminated liquids

Publications (2)

Publication Number Publication Date
EP0704627A1 EP0704627A1 (en) 1996-04-03
EP0704627B1 true EP0704627B1 (en) 1997-11-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113954A Expired - Lifetime EP0704627B1 (en) 1994-09-27 1995-09-06 Submersible pump for coarsely polluted liquids

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EP (1) EP0704627B1 (en)
DE (2) DE4434461A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11808268B2 (en) 2020-10-19 2023-11-07 Milwaukee Electric Tool Corporation Stick pump assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL208405B1 (en) 2002-05-07 2011-04-29 Emu Unterwasserpumpen Gmbh Driving motor, especially for a pump
DE10233281A1 (en) * 2002-07-23 2004-02-05 Ksb Aktiengesellschaft Device for maintaining the absorbency of a submersible pump
RU2472036C1 (en) * 2011-09-26 2013-01-10 Закрытое Акционерное Общество Научно-Производственное Объединение "Тэн" Submersible slurry pump
RU2472037C1 (en) * 2011-09-26 2013-01-10 Закрытое Акционерное Общество Научно-Производственное Объединение "Тэн" Submersible slurry pump (versions)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1259710A (en) * 1960-06-09 1961-04-28 Scandinavian Agencies Corp Ltd Centrifugal pump driven by electric motor
SE367465B (en) * 1965-04-30 1974-05-27 Stenberg Flygt Ab
US4134711A (en) * 1976-11-26 1979-01-16 Engineers Sales-Service Co., Inc. Submersible pump apparatus
JPH04347389A (en) * 1991-05-24 1992-12-02 Ishigaki Mech Ind Co Eliminator of entangling impurities in vertical shaft pump
IT1257704B (en) * 1991-12-05 1996-02-01 Nocchi Pompe Spa MULTI-FUNCTIONAL WATER PUMP: CENTRIFUGAL, FOR DEEP SUCTION, SELF-PRIMING, CENTRIFUGAL WITH PRESSURE REGULATION, SELF-PRIMING WITH PRESSURE REGULATION, WITH STARTING DEVICE AND / OR AUTOMATIC STOP

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11808268B2 (en) 2020-10-19 2023-11-07 Milwaukee Electric Tool Corporation Stick pump assembly

Also Published As

Publication number Publication date
DE4434461A1 (en) 1996-03-28
DE59501033D1 (en) 1998-01-08
EP0704627A1 (en) 1996-04-03

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