DE704854C - Centrifugal pump, which is driven by a liquid-cooled electric motor, with a ventilation pump designed as a liquid ring pump - Google Patents

Centrifugal pump, which is driven by a liquid-cooled electric motor, with a ventilation pump designed as a liquid ring pump

Info

Publication number
DE704854C
DE704854C DEA88796D DEA0088796D DE704854C DE 704854 C DE704854 C DE 704854C DE A88796 D DEA88796 D DE A88796D DE A0088796 D DEA0088796 D DE A0088796D DE 704854 C DE704854 C DE 704854C
Authority
DE
Germany
Prior art keywords
pump
liquid
driven
liquid ring
electric motor
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
Application number
DEA88796D
Other languages
German (de)
Inventor
Wilhelm Klein
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.)
AMAG HILPERT PEGNITZHUETTE AKT
Original Assignee
AMAG HILPERT PEGNITZHUETTE AKT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AMAG HILPERT PEGNITZHUETTE AKT filed Critical AMAG HILPERT PEGNITZHUETTE AKT
Priority to DEA88796D priority Critical patent/DE704854C/en
Application granted granted Critical
Publication of DE704854C publication Critical patent/DE704854C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00Priming; Preventing vapour lock
    • F04D9/04Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/041Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/58Cooling; Heating; Diminishing heat transfer
    • F04D29/5806Cooling the drive system

Landscapes

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

Description

Kreiselpumpe, die von einem flüssigkeitsgekühlten Elektromotor angetrieben wird, mit einer als Flüssigkeitsringpulnpä,usgebildeten Entlüftungspumpe Für verschiedene Zwecke finden selbstentlüftende Kreiselpumpen Verwendung, die von einem v öllig eingekapselten Motor angetrieben werden. Es ist bekannt, diese :Motoren mit einer Kühlschlange oder einem von der Förderflüssigkeit durchströmten Kühlmantel zu versehen, damit die Erwärmung des Motors nicht zu hoch wird. Dies ist insbesondere dann erforderlich, wenn der Motor unter dem Spiegel der zu fördernden Flüssigkeit eingebaut ist, dieser Spiegel aber so weit absinkt, daß der Motor zeitweise über ihn hinausragt. Wenn der Motor völlig von der Außenluft abgeschlossen ist, wird er in diesem Falle nur ungenügend gekühlt.Centrifugal pump driven by a liquid-cooled electric motor with a venting pump designed as a liquid ring pulp for various Purposes find self-bleeding centrifugal pumps use, which are completely encapsulated motor are driven. It is known this: engines with a To provide a cooling coil or a cooling jacket through which the pumped liquid flows, so that the heating of the motor does not become too high. This is particularly necessary if the motor is installed below the level of the liquid to be pumped, this one But the mirror sinks so far that the motor sometimes protrudes over it. if If the engine is completely closed off from the outside air, in this case it will only work insufficiently cooled.

Wenn bei derartigen Pumpen die Kühlflüssigkeit für den Motor, wie üblich, der Kreiselpumpe entnommen wird, dann zeigt sich ein Nachteil, wenn die Kreiselpumpe gegen einen nur geringen Druck arbeitet, also nur eine geringe Förderhöhe zu überwinden hat. Es genügt dann, wie sich herausgestellt hat, der Druck der Kreiselpumpe nicht, um genügend Kühlflüssigkeit durch das Kühlsystem des Motors zu drücken.If in such pumps the cooling liquid for the engine, such as usual, the centrifugal pump is taken, then a disadvantage shows up when the Centrifugal pump works against only a low pressure, i.e. only a low delivery head has to overcome. As has been found, the pressure of the centrifugal pump is sufficient not to force enough coolant through the engine's cooling system.

Dieser Nachteil wird erfindungsgemäß dadurch vermieden, daß die Kühlflüssigkeit nicht der Kreiselpumpe, sondern der als Flüssigkeitsringpumpe ausgebildeten Entlüftungspumpe entnommen wird. Da im Flüssigkeitsring der Druck stets gleich hoch ist, ist eine gute Kühlung des Motors auch bei der kleinsten Förderhöhe der Kreiselpumpe gesichert. Dabei kann entweder die gesamte von der Flüssigkeitsringpumpe geförderte Flüssigkeit oder nur ein Teil derselben als Kühlflüssigkeit verwendet werden. Im letzteren Falle wird der Flüssigkeitsring der Entlüftungspumpe an einer innerhalb des Umfanges des Flügelrades liegenden Stelle angezapft. Besonders vorteilhaft ist es, die Saugseite der Entlüftungspumpe am Druckstutzen der Kreiselpumpe anzuschließen. Daraus ergibt sich nicht nur in bekannter Weise die völlige Entlüftung der Kreiselpumpe, sondern infolge der Hintereinanderschaltung beider Pumpen eine Summierung des Druckes der Kreiselpumpe zu demjenigen der Flüssigkeitsringpumpe.This disadvantage is avoided according to the invention in that the cooling liquid not the centrifugal pump, but the venting pump designed as a liquid ring pump is removed. Since the pressure in the liquid ring is always the same, there is a good cooling of the motor ensured even at the lowest delivery head of the centrifugal pump. Either all of the liquid conveyed by the liquid ring pump can be used or only a part thereof can be used as a cooling liquid. In the latter case the liquid ring of the priming pump is attached to one within the circumference of the Impeller lying position tapped. It is particularly advantageous to use the suction side of the ventilation pump to the pressure port of the centrifugal pump. From this it follows not only the complete venting of the centrifugal pump in a known manner, but as a result of the series connection of the two pumps, a summation of the pressure of the Centrifugal pump to that of the liquid ring pump.

Während der Dauer der Entlüftungsperixie fördert die Flüssigkeitsringpumpe nur Luft. Da diese Zeit aber nur kurz ist und während ihr der Motor nur mit so geringer Belastung läuft, daß die Kühlung durch die von der Flüssigkeitsringpumpe ausgestoßene Luft genügt, bestehen keine Bedenken, daß während dieser Zeit der Motor sich unzulässig hoch erwärmt.The liquid ring pump delivers for the duration of the venting perixia just air. But since this time is only short and during it the engine is only so little Load runs that the cooling by the expelled from the liquid ring pump Air is sufficient, there are no concerns that during this time the engine is inadmissible highly heated.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.An exemplary embodiment of the invention is shown in the drawing.

Auf der Welle der Kreiselpumpe t, deren Saugstutzen mit 2 und deren Druckstutzen mit 3 bezeichnet ist, sitzt sowohl die als Entlüftungspumpe dienende Flüssigkeitsringpumpe 4 als auch der Elektromotor 5. Dieser ist von einem Kühlsystem, das im gezeichneten Ausführungsbeispiel aus der Rohrschlange 6 gebildet wird, umgeben. Die Rohrschlange 6 ist durch das Rohr 7 an die Druckseite der FlüssigkeitsringpumPe 4 angeschlossen und führt bei 8 ins Freie. Die Saugseite der FlüssigkeitsringpumPe 4 ist durch das Rohr 9 mit dem Druckstutzen 3 der Kreiselpumpe r verbunden. Bei dem gezeichneten Ausführungsbeispiel wird die gesamte von der Flüssigkeitmringpumpe 4 geförderte Flüssigkeit zur Kühlung des Motors 5 durch das Kühlsystem 6 gedrückt.On the shaft of the centrifugal pump t, its suction nozzle with 2 and its Pressure port is denoted by 3, both serving as a vent pump sits Liquid ring pump 4 as well as the electric motor 5. This is from a cooling system, which is formed in the illustrated embodiment from the coil 6, surrounded. The coil 6 is through the pipe 7 on the pressure side of the liquid ring pump 4 and leads outside at 8. The suction side of the liquid ring pump 4 is connected to the pressure port 3 of the centrifugal pump r through the pipe 9. at the illustrated embodiment is the entire of the liquid ring pump 4 pumped liquid for cooling the motor 5 pressed through the cooling system 6.

Claims (2)

PATLNTANSPRÜCHR: t. Kreiselpumpe, die von einem flüssigkeitsgekühlten Elektromotor angetrieben wird, mit einer als Flüssigkeitsringpumpe ausgebildeten Entlüftungspumpe, dadurch gekennzeichnet, daß das Kühlsystem (6) des Motors (5) von der Flüssigkeitsringpumpe (4) aus gespeist wird. PATLNT CLAIMR: t. Centrifugal pump driven by a liquid-cooled Electric motor is driven, with one designed as a liquid ring pump Ventilation pump, characterized in that the cooling system (6) of the motor (5) is fed from the liquid ring pump (4). 2. Pumpe nach Anspruch r, dadurch gekennzeichnet, daß lediglich ein Teil der von der Flüssigkeitsringpumpe (4) geförderten .Flüssigkeit dem Kühlsystem (6) des Motors (5) zugeführt wird.2. Pump according to claim r, characterized characterized in that only part of the conveyed by the liquid ring pump (4) .Liquid is fed to the cooling system (6) of the motor (5).
DEA88796D 1939-01-15 1939-01-15 Centrifugal pump, which is driven by a liquid-cooled electric motor, with a ventilation pump designed as a liquid ring pump Expired DE704854C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA88796D DE704854C (en) 1939-01-15 1939-01-15 Centrifugal pump, which is driven by a liquid-cooled electric motor, with a ventilation pump designed as a liquid ring pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA88796D DE704854C (en) 1939-01-15 1939-01-15 Centrifugal pump, which is driven by a liquid-cooled electric motor, with a ventilation pump designed as a liquid ring pump

Publications (1)

Publication Number Publication Date
DE704854C true DE704854C (en) 1941-04-08

Family

ID=6950433

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA88796D Expired DE704854C (en) 1939-01-15 1939-01-15 Centrifugal pump, which is driven by a liquid-cooled electric motor, with a ventilation pump designed as a liquid ring pump

Country Status (1)

Country Link
DE (1) DE704854C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2308369A1 (en) * 1973-02-21 1974-08-22 Friedrich Schweinfurter ELECTRICALLY DRIVEN, IN PARTICULAR CORRIOSION RESISTANT, PORTABLE LIQUID SUBMERSIBLE PUMP

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2308369A1 (en) * 1973-02-21 1974-08-22 Friedrich Schweinfurter ELECTRICALLY DRIVEN, IN PARTICULAR CORRIOSION RESISTANT, PORTABLE LIQUID SUBMERSIBLE PUMP

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