EP0467011A1 - Liquid ring pump with magnetic coupling - Google Patents

Liquid ring pump with magnetic coupling Download PDF

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Publication number
EP0467011A1
EP0467011A1 EP91102360A EP91102360A EP0467011A1 EP 0467011 A1 EP0467011 A1 EP 0467011A1 EP 91102360 A EP91102360 A EP 91102360A EP 91102360 A EP91102360 A EP 91102360A EP 0467011 A1 EP0467011 A1 EP 0467011A1
Authority
EP
European Patent Office
Prior art keywords
liquid ring
space
liquid
pump
ring gas
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
Application number
EP91102360A
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German (de)
French (fr)
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EP0467011B1 (en
Inventor
Udo Dipl.-Ing. Segebrecht
Klaus Dipl.-Ing. Domagalla
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.)
Sihi GmbH and Co KG
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Sihi GmbH and Co KG
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Publication of EP0467011A1 publication Critical patent/EP0467011A1/en
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Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096—Heating; Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply

Definitions

  • the invention relates to a liquid ring gas pump according to the preamble of claim 1.
  • Liquid ring gas pumps require a constant supply of operating fluid from the outside in order to maintain their operation, since the gas compressed by the pump always expels operating fluid through the pressure port from the pump. Furthermore, this liquid supply is necessary for cooling the pump and the canned drive as well as for cooling and lubricating bearings.
  • these pumps receive the liquid from the separating tank, which is arranged behind the pump following the pressure port and in which the mixture emerging from the pump is separated into liquid and gas. It is known to supply this liquid to a space of the pump, from which it can be passed on the one hand to the drive part and on the other hand to the pump part. Since the liquid is supplied from the outside, it makes sense to lead it to a hole in the outer housing wall or at another point away from the shaft. At this point there is then a pressure which is between the pump suction and the final pump pressure, the pressure difference between the pressure prevailing here and the final pressure of the pump prevailing in the separating tank being used to supply the liquid.
  • the invention is based on the knowledge that this problem occurs when the space to which the liquid is supplied is partially delimited by rotating parts, for example by the shaft and / or the inner rotor of the canned drive. These parts set the liquid in the ring-shaped space in rotation, so that an annular flow arises in which the pressure increases from the shaft to the outside. This pressure counteracts the fluid supply taking place away from the waves.
  • the solution to this problem according to the invention consists in that the ring flow mentioned is prevented or inhibited by a flow interfering device arranged in the room and counteracting it.
  • a flow interfering device arranged in the room and counteracting it.
  • This can be formed by a longitudinally and / or radially extending rib or a correspondingly projecting housing protrusion.
  • the rib or the housing projection is expediently arranged in such a way that the fluid is thoroughly swirled in the space.
  • the invention is explained below with reference to the drawing, which shows a schematic longitudinal section through a liquid ring gas pump and its drive.
  • the pump part 1 comprises a pump housing 2 and impeller 3 on a shaft 4, which is mounted at 5. Another bearing and other parts of the pump housing have not been shown.
  • the drive part 6 comprises an outer drive rotor 7 and an inner, driven rotor 8 which sits on the end of the shaft 4. They are separated from one another by the can 9, which is connected to the pump housing 2 via a housing part 10, which encloses a space 11 between the pump part 1 and the drive part 6, which is delimited by the shaft 4 and the rotor 8 apart from fixed housing parts and is substantially ring-shaped.
  • the housing part 10 contains a bore 12 through which operating fluid is constantly supplied to the space 11 from a storage container 13 via a line 14, which operating fluid is supplied to this space due to the static pressure difference between the space 11 and the container 13. The supply could also take place at another location remote from the shaft.
  • the space 11 contains a rib 15, which is arranged radially and axially parallel and thereby counteracts the build-up of a rotating liquid ring in the space 11.
  • Any device which largely suppresses the rotation of the liquid in the space 11 can serve this purpose so that the pressure it generates at the liquid supply point is sufficiently lower than the pressure available for supplying the liquid.
  • the invention is independent of whether the canned drive is designed as a canned motor drive or as a canned magnetic drive.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

A liquid ring gas pump which consists of a pump section (1) and a drive section (6) has operating, cooling and lubricating fluid fed to it from a point (12) in a chamber (11) remote from the shaft, which chamber is partially defined by rotating parts (4, 8). The creation of a rotating liquid ring which might impede the fluid feed is counteracted by a flow disturbance device (15) arranged in the chamber, which device may be designed as a fin or housing projection running longitudinally or radially. <IMAGE>

Description

Die Erfindung betrifft eine Flüssigkeitsringgaspumpe nach dem Oberbegriff des Anspruchs 1.The invention relates to a liquid ring gas pump according to the preamble of claim 1.

Flüssigkeitsringgaspumpen benötigen zur Aufrechterhaltung Ihres Betriebs eine ständige Zufuhr von Betriebsflüssigkeit von außen, da mit dem von der Pumpe verdichteten Gas auch stets Betriebsflüssigkeit durch den Druckstutzen aus der Pumpe ausgestoßen wird. Ferner ist diese Flüssigkeitszufuhr erforderlich zur Kühlung der Pumpe und des Spaltrohrantriebs sowie ggfs. zur Kühlung und Schmierung von Lagern. Normalerweise erhalten diese Pumpen die Flüssigkeit aus dem Abscheidebehälter zugeführt, der hinter der Pumpe im Anschluß an den Druckstutzen angeordnet ist und in dem die Trennung des aus der Pumpe austretenden Gemisches in Flüssigkeit und Gas erfolgt. Es ist bekannt, diese Flüssigkeit einem Raum der Pumpe zuzuführen, von dem aus sie einerseits zu dem Antriebsteil und andererseits zu dem Pumpenteil geleitet werden kann. Da die Flüssigkeit von außen zugeführt wird, bietet es sich an, sie einer Bohrung in der äußeren Gehäusewand oder an anderer wellenfernen Stelle zuzuleiten. An dieser Stelle herrscht dann ein Druck, der zwischen Pumpensaug- und Pumpenenddruck liegt, wobei die Druckdifferenz zwischen dem hier herrschenden Druck und dem im Abscheidebehälter herrschenden Enddruck der Pumpe zur Zuführung der Flüssigkeit genutzt wird.Liquid ring gas pumps require a constant supply of operating fluid from the outside in order to maintain their operation, since the gas compressed by the pump always expels operating fluid through the pressure port from the pump. Furthermore, this liquid supply is necessary for cooling the pump and the canned drive as well as for cooling and lubricating bearings. Normally, these pumps receive the liquid from the separating tank, which is arranged behind the pump following the pressure port and in which the mixture emerging from the pump is separated into liquid and gas. It is known to supply this liquid to a space of the pump, from which it can be passed on the one hand to the drive part and on the other hand to the pump part. Since the liquid is supplied from the outside, it makes sense to lead it to a hole in the outer housing wall or at another point away from the shaft. At this point there is then a pressure which is between the pump suction and the final pump pressure, the pressure difference between the pressure prevailing here and the final pressure of the pump prevailing in the separating tank being used to supply the liquid.

Bei bekannten Pumpen dieser Art hat sich gezeigt, daß die Flüssigkeitszufuhr in bestimmten Betriebszuständen unzureichend ist. Dieses Problem tritt verstärkt dann auf, wenn an der Flüssigkeitsringgaspumpe nur geringe Druckdifferenzen zwischen Pumpenansaug- und Pumpendruckstutzen herrschen.In known pumps of this type it has been shown that the liquid supply is insufficient in certain operating states. This problem arises when the liquid ring gas pump has only slight pressure differences between the pump suction and pump pressure ports.

Die Erfindung beruht auf der Erkenntnis, daß dieses Problem dann auftritt, wenn der Raum, dem die Flüssigkeit zugeführt wird, teilweise von drehenden Teilen begrenzt wird, bspw. von der Welle und/oder dem inneren Rotor des Spaltrohrantriebs. Diese Teile versetzen die Flüssigkeit in dem ringförmig ausgebildeten Raum in Drehung, so daß eine Ringströmung entsteht, in welcher der Druck von der Welle nach außen hin ansteigt. Dieser Druck wirkt der wellenfern stattfindenden Flüssigkeitszufuhr entgegen.The invention is based on the knowledge that this problem occurs when the space to which the liquid is supplied is partially delimited by rotating parts, for example by the shaft and / or the inner rotor of the canned drive. These parts set the liquid in the ring-shaped space in rotation, so that an annular flow arises in which the pressure increases from the shaft to the outside. This pressure counteracts the fluid supply taking place away from the waves.

Die erfindungsgemäße Lösung dieses Problems besteht darin, daß die erwähnte Ringströmung unterbunden oder gehemmt wird durch eine in dem Raum angeordnete, ihr entgegenwirkende Strömungsstöreinrichtung. Diese kann von einer längs und/oder radial verlaufenden Rippe oder einem entsprechend in den Raum vorstehenden Gehäusevorsprungs gebildet sein.The solution to this problem according to the invention consists in that the ring flow mentioned is prevented or inhibited by a flow interfering device arranged in the room and counteracting it. This can be formed by a longitudinally and / or radially extending rib or a correspondingly projecting housing protrusion.

Dadurch wird verhindert, daß sich in diesem Raum ein stabiler, umlaufender Flüssigkeitsring mit entsprechend erhöhtem Druck am Umfang des Raums aufbaut.This prevents a stable, circumferential liquid ring from being built up in the space with a correspondingly increased pressure on the periphery of the space.

Zweckmäßigerweise wird die Rippe, bzw. der Gehäusevorsprung so angeordnet, daß eine gute Durchwirbelung der Flüssigkeit in dem Raum stattfindet.The rib or the housing projection is expediently arranged in such a way that the fluid is thoroughly swirled in the space.

Weiter ist es sinnvoll, die Rippe bzw. den Gehäusevorsprung so anzuordnen, daß er - in Drehrichtung des sich ausbildenden Flüssigkeitsringes gesehen - direkt vor der Flüssigkeitszuführungsbohrung liegt. Man erreicht dadurch, daß dann in diesem Bereich der Zuführungsbohrung sogar ein Unterdruck entsteht, der die Flüssigkeitszufuhr zur Pumpe fördert.Furthermore, it makes sense to arrange the rib or the housing projection in such a way that it - seen in the direction of rotation of the liquid ring which forms - lies directly in front of the liquid supply bore. The result of this is that a vacuum is then even created in this area of the supply bore, which promotes the supply of liquid to the pump.

Die Erfindung wird im folgenden unter Bezugnahme auf die Zeichnung erläutert, die einen schematischen Längsschnitt durch eine Flüssigkeitsringgaspumpe und deren Antrieb zeigt. Der Pumpenteil 1 umfaßt ein Pumpengehäuse 2 und Laufrad 3 auf einer Welle 4, die bei 5 gelagert ist. Auf die Darstellung eines weiteren Lagers und weiterer Teile des Pumpengehäuses wurde verzichtet.The invention is explained below with reference to the drawing, which shows a schematic longitudinal section through a liquid ring gas pump and its drive. The pump part 1 comprises a pump housing 2 and impeller 3 on a shaft 4, which is mounted at 5. Another bearing and other parts of the pump housing have not been shown.

Der Antriebsteil 6 umfaßt einen äußeren Antriebsrotor 7 und einen inneren, angetriebenen Rotor 8, der auf dem Ende der Welle 4 sitzt. Sie sind voneinander durch das Spaltrohr 9 getrennt, das mit dem Pumpengehäuse 2 über einen Gehäuseteil 10 verbunden ist, der einen Raum 11 zwischen dem Pumpenteil 1 und dem Antriebsteil 6 einschließt, der außer von feststehenden Gehäuseteilen von der Welle 4 und dem Rotor 8 begrenzt wird und im wesentlichen ringförmig gestaltet ist. Der Gehäuseteil 10 enthält eine Bohrung 12, durch die dem Raum 11 von einem Vorratsbehälter 13 her über eine Leitung 14 ständig Betriebsflüssigkeit zugeführt wird, die diesem Raum aufgrund der statischen Druckdifferenz zwischen dem Raum 11 und dem Behälter 13 zugeführt wird. Die Zufuhr könnte auch an anderer wellenferner Stelle erfolgen.The drive part 6 comprises an outer drive rotor 7 and an inner, driven rotor 8 which sits on the end of the shaft 4. They are separated from one another by the can 9, which is connected to the pump housing 2 via a housing part 10, which encloses a space 11 between the pump part 1 and the drive part 6, which is delimited by the shaft 4 and the rotor 8 apart from fixed housing parts and is substantially ring-shaped. The housing part 10 contains a bore 12 through which operating fluid is constantly supplied to the space 11 from a storage container 13 via a line 14, which operating fluid is supplied to this space due to the static pressure difference between the space 11 and the container 13. The supply could also take place at another location remote from the shaft.

Erfindungsgemäß enthält der Raum 11 eine Rippe 15, die radial und achsparallel angeordnet ist und dadurch dem Aufbau eines rotierenden Flüssigkeitsrings in dem Raum 11 entgegenwirkt.According to the invention, the space 11 contains a rib 15, which is arranged radially and axially parallel and thereby counteracts the build-up of a rotating liquid ring in the space 11.

Diesem Zweck kann jede Einrichtung dienen, die die Flüssigkeitsrotation in dem Raum 11 so weitgehend unterdrückt, daß der von ihr erzeugte Druck an der Flüssigkeitszufuhrstelle hinreichend geringer ist als der für die Zufuhr der Flüssigkeit zur Verfügung stehende Druck.Any device which largely suppresses the rotation of the liquid in the space 11 can serve this purpose so that the pressure it generates at the liquid supply point is sufficiently lower than the pressure available for supplying the liquid.

Auf die Darstellung der Weiterleitung der Flüssigkeit von dem Raum 11 zum Pumpenteil 1, bzw. zum Antriebsteil 6 wurde verzichtet, weil insoweit auf bekannten Stand der Technik zurückgegriffen werden kann.The forwarding of the liquid from the space 11 to the pump part 1 or to the drive part 6 has been omitted because known prior art can be used in this respect.

Die Erfindung ist unabhängig davon, ob der Spaltrohrantrieb als Spaltrohr-Motorantrieb oder als Spaltrohr-Magnetantrieb ausgebildet ist.The invention is independent of whether the canned drive is designed as a canned motor drive or as a canned magnetic drive.

Claims (5)

1. Flüssigkeitsringgaspumpe mit Spaltrohrantrieb und mit Betriebsflüssigkeitszufuhr zum wellenfernen Bereich eines teilweise von drehenden Teilen (4,8) begrenzten Raums (11) dadurch gekennzeichnet, daß der Raum (11) eine einer Ringströmung entgegenwirkende Strömungsstöreinrichtung (15) besitzt.1. Liquid ring gas pump with canned drive and with operating fluid supply to the area remote from the shaft of a partially delimited by rotating parts (4, 8) space (11), characterized in that the space (11) has a flow disturbing device (15) counteracting an annular flow. 2. Flüssigkeitsringgaspumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Raum (11) zwischen dem Spaltrohrantrieb (6) und dem Pumpenteil (1) liegt.2. Liquid ring gas pump according to claim 1, characterized in that the space (11) between the canned drive (6) and the pump part (1). 3. Flüssigkeitsringgaspumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Strömungsstöreinrichtung von einer längs und/oder radial verlaufenden Rippe (15) gebildet ist.3. Liquid ring gas pump according to claim 1 or 2, characterized in that the flow disturbing device is formed by a longitudinal and / or radially extending rib (15). 4. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Strömungsstöreinrichtung von einem längs und/oder achsparallel in den Raum (11) vorstehenden Gehäusevorsprungs (15) gebildet ist.4. Liquid ring gas pump according to one of claims 1 to 3, characterized in that the flow disturbing device is formed by a longitudinal and / or axially parallel in the space (11) projecting housing projection (15). 5. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Strömungsstöreinrichtung, in Drehrichtung der Pumpe gesehen, unmittelbar vor der Flüssigkeitszuführungsbohrung (12) angeordnet ist.5. Liquid ring gas pump according to one of claims 1 to 4, characterized in that the flow disturbing device, seen in the direction of rotation of the pump, is arranged directly in front of the liquid supply bore (12).
EP91102360A 1989-10-18 1991-02-19 Liquid ring pump with magnetic coupling Expired - Lifetime EP0467011B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3934720A DE3934720A1 (en) 1989-10-18 1989-10-18 LIQUID RING GAS PUMP WITH HERMETICALLY CLOSED OR ENCLOSED DRIVE

Publications (2)

Publication Number Publication Date
EP0467011A1 true EP0467011A1 (en) 1992-01-22
EP0467011B1 EP0467011B1 (en) 1993-05-12

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Application Number Title Priority Date Filing Date
EP91102360A Expired - Lifetime EP0467011B1 (en) 1989-10-18 1991-02-19 Liquid ring pump with magnetic coupling

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EP (1) EP0467011B1 (en)
AT (1) ATE89371T1 (en)
DE (2) DE3934720A1 (en)
ES (1) ES2042317T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5569024A (en) * 1994-09-13 1996-10-29 Bayer Aktiengesellschaft Pump for delivering hot, corrosive media
CN108397399A (en) * 2018-03-21 2018-08-14 绵阳科大久创科技有限公司 A kind of ultra-clean gas conveying of magnetic drive and shifting pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912938A1 (en) * 1979-03-31 1980-10-09 Lederle Pumpen & Maschf Liquid-ring pump for gas - has impeller shaft driven via magnetic coupling with concentric halves separating pump section from drive input

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6812819A (en) * 1968-03-07 1969-09-09
DE3513348C3 (en) * 1985-04-13 1994-04-14 Lederle Pumpen & Maschf Liquid ring gas pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912938A1 (en) * 1979-03-31 1980-10-09 Lederle Pumpen & Maschf Liquid-ring pump for gas - has impeller shaft driven via magnetic coupling with concentric halves separating pump section from drive input

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5569024A (en) * 1994-09-13 1996-10-29 Bayer Aktiengesellschaft Pump for delivering hot, corrosive media
CN108397399A (en) * 2018-03-21 2018-08-14 绵阳科大久创科技有限公司 A kind of ultra-clean gas conveying of magnetic drive and shifting pump

Also Published As

Publication number Publication date
ES2042317T3 (en) 1993-12-01
DE3934720A1 (en) 1991-04-25
EP0467011B1 (en) 1993-05-12
DE59100107D1 (en) 1993-06-17
DE3934720C2 (en) 1992-05-07
ATE89371T1 (en) 1993-05-15

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