EP1477682B1 - Liquid ring gas pump - Google Patents

Liquid ring gas pump Download PDF

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Publication number
EP1477682B1
EP1477682B1 EP03011219A EP03011219A EP1477682B1 EP 1477682 B1 EP1477682 B1 EP 1477682B1 EP 03011219 A EP03011219 A EP 03011219A EP 03011219 A EP03011219 A EP 03011219A EP 1477682 B1 EP1477682 B1 EP 1477682B1
Authority
EP
European Patent Office
Prior art keywords
liquid ring
control discs
ring gas
gas pump
openings
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
EP03011219A
Other languages
German (de)
French (fr)
Other versions
EP1477682A1 (en
Inventor
Bernd Wenckebach
Silke Heetsch
Alfons Dr. Jünemann
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.)
Sterling Fluid Systems Germany GmbH
Sterling Fluid Systems GmbH
Original Assignee
Sterling Fluid Systems Germany GmbH
Sterling Fluid Systems GmbH
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 Sterling Fluid Systems Germany GmbH, Sterling Fluid Systems GmbH filed Critical Sterling Fluid Systems Germany GmbH
Priority to AT03011219T priority Critical patent/ATE391852T1/en
Priority to DK03011219T priority patent/DK1477682T3/en
Priority to ES03011219T priority patent/ES2303574T3/en
Priority to DE50309581T priority patent/DE50309581D1/en
Priority to EP03011219A priority patent/EP1477682B1/en
Priority to PT03011219T priority patent/PT1477682E/en
Priority to TW093112251A priority patent/TWI274108B/en
Priority to CNB2004800134388A priority patent/CN100404868C/en
Priority to US10/556,748 priority patent/US7648344B2/en
Priority to PCT/EP2004/004742 priority patent/WO2004102002A1/en
Priority to CA002523958A priority patent/CA2523958C/en
Priority to JP2006529735A priority patent/JP4324614B2/en
Priority to MYPI20041827A priority patent/MY137027A/en
Publication of EP1477682A1 publication Critical patent/EP1477682A1/en
Priority to HK05103930A priority patent/HK1071182A1/en
Priority to ZA200507202A priority patent/ZA200507202B/en
Priority to NO20054680A priority patent/NO20054680L/en
Application granted granted Critical
Publication of EP1477682B1 publication Critical patent/EP1477682B1/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
    • 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
    • F04C19/005—Details concerning the admission or discharge
    • F04C19/007—Port members in the form of side plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material
    • F04C2230/103—Manufacture by removing material using lasers
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/21—Manufacture essentially without removing material by casting
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet

Definitions

  • an impeller rotates within an eccentrically rotating fluid ring.
  • the liquid ring more or less immersed in the cells formed between the wings of the impeller.
  • the free volume in the impeller cells is alternately increased and decreased.
  • the suction opening through which the gas to be conveyed is sucked into the cells, is located in the front side in a control disk.
  • Liquid ring gas pumps are used both as a vacuum pump, where the delivery gas is compressed from a negative pressure to about atmospheric pressure, and as a compressor in which the delivery gas is compressed from atmospheric to an overpressure.
  • Liquid ring gas pumps are available as single-stage and multi-stage versions. Single-stage liquid ring gas pumps can be used as a vacuum pump in the upper rough vacuum or as a compressor due to the lower compression ratio. Two-stage machines have their preferred use as a vacuum pump in the lower pressure range of the vacuum.
  • the work spaces in which the impeller rotates and the liquid ring is formed, are limited axially on one side or on both sides by a control disk.
  • these work spaces with impeller and control discs are arranged axially in a corresponding number one behind the other.
  • the control discs have openings which ensure the inflow and outflow of the conveying gas from the outer compressor housing into and out of the working space.
  • openings which ensure the inflow and outflow of the conveying gas from the outer compressor housing into and out of the working space.
  • the achievable Ansaugvolumenstrom and the efficiency of the exact position and the geometric contours of the openings have great influence. Therefore, in practice, the shape and size of suction and pressure opening differ.
  • control discs are structurally designed differently.
  • each of the four control discs has a different geometry.
  • the two axially outer control discs each have a suction and pressure port; the first stage middle control disk has only the pressure port, and the second stage middle control disk has only the suction port.
  • the control discs are designed as castings, even the two outer control discs are structurally different, because the openings and the centering of the housing are arranged in mirror image.
  • the disadvantage of this conventional pump design is the large number of different components that cause high complexity in the production, the parts procurement, the parts processing and warehousing. High piece and processing costs are the result.
  • control discs can be stamped from flat sheets or processed with laser technology.
  • the outflow from the working space is stepped in the pressure slot, whereby approximately a curved flow channel is modeled.
  • Consistently uniform control discs which are designed as flat components, have hitherto been used only in single-stage liquid ring gas pumps, since they always have a suction opening and a pressure opening when they are of uniform design ( DE 10 57 284 B . DE 197 58 340 A1 ). For example, for multi-stage pumps in which the middle control discs may have only one opening, at least three different versions of the control discs would be necessary.
  • the solution according to the invention is that unused openings on the side facing away from the impeller by adjacent housing parts and are covered.
  • the liquid ring gas pump according to the invention has only control disks of identical geometrical design. Possible This is because the unnecessary openings on the side facing away from the impeller are covered by adjacent components. It is not necessary that in the control disk, the remaining open space of the unneeded opening must be filled, although it would be thought that the efficiency is deteriorated by this additional space in which there is also gas to be pumped. Surprisingly, however, the liquid ring gas pump according to the invention works with the same performance data as a liquid ring gas pump without the corresponding open spaces in the control discs, since the respectively outside covered opening in the working space is axially opposite the opening to the associated flow channels. In this position of the impeller are equal pressures during the compression process in the adjacent impeller cells, whereby virtually no backflow occur. It has also been proven experimentally that there is no negative influence on the intake volume flow of the liquid ring gas pump.
  • the invention can be used when the respectively unused suction or pressure opening is covered. According to the invention, therefore, complete liquid ring gas pump series consisting of single-stage and multi-stage machines as well as compressor stages with different axial lengths can be equipped at all points with the same uniform control disks.
  • the invention achieves a significant reduction in the number of different components. This results in significant savings in the manufacturing and assembly process. The manufacturing cost of such a liquid ring gas pump are therefore significantly lower.
  • control discs may contain further required for the function of the compressor openings (holes), for example, for the liquid, which are either open or covered.
  • the uniform control disks are flat plates and have a suction opening and a pressure opening.
  • the uniform control discs may also be castings and then also include a suction port and a pressure port.
  • control disk is produced by punching, laser burning or water jet cutting, in many cases no further processing is required.
  • FIG. 3 shows a single-stage pump, in which the two control discs 3 are formed identical to the suction port 6 and the pressure port 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Gyroscopes (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Laser Beam Processing (AREA)
  • External Artificial Organs (AREA)

Abstract

The fluid ring gas pump, with one or more stages, has a working zone (8) for each with a vane wheel (2) on an eccentric mounting. The working zone is defined axially on both sides by flat control disks (3,4), with channels or chambers for the inflow and outflow of the carrier gas. The control disks are identical, each fitted with the same suction (6) and pressure (7) openings, and the unused openings are covered on the sides away from the vane wheel. The disk openings (12) for the compressor function are open or shrouded selectively. The control disks are stamped, burned by a laser beam or cut by water jets.

Description

Die Erfindung betrifft eine Flüssigkeitsringgaspumpe mit einer oder mehreren Stufen, die jeweils einen Arbeitsraum, ein darin exzentrisch gelagertes Flügelrad, den Arbeitsraum beidseitig axial begrenzende flache Steuerscheiben und sich daran anschließende Kanäle oder Kammern für die Zu- und Abführung des Fördergases zu dem und von dem Arbeitsraum aufweisen, wobei die Steuerscheiben identisch miteinander mit gleichen Saug- und Drucköffnungen ausgebildet sind.The invention relates to a liquid ring gas pump with one or more stages, each having a working space, an eccentrically mounted therein impeller, the working space on both sides axially delimiting flat control discs and adjoining channels or chambers for the supply and discharge of the conveying gas to and from the working space have, wherein the control discs are formed identical to each other with the same suction and pressure openings.

In Flüssigkeitsringgaspumpen läuft ein Flügelrad innerhalb eines exzentrisch kreisenden Flüssigkeitsrings um. Während des Umlaufs taucht der Flüssigkeitsring mehr oder weniger weit in die zwischen den Flügeln des Flügelrads gebildeten Zellen ein. Dadurch wird das freie Volumen in den Flügelradzellen wechselnd vergrößert und verkleinert. In demjenigen Umlaufbereich, in welchem sich das Zellenvolumen vergrößert, befindet sich stirnseitig in einer Steuerscheibe die Saugöffnung, durch die das zu fördernde Gas in die Zellen eingesaugt wird. Im Endbereich desjenigen Umlaufteils, in welchem sich die Kompression vollzieht, befindet sich die Drucköffnung, durch die das komprimierte Gas in den Druckraum der Pumpe ausgeschoben wird.In liquid ring gas pumps, an impeller rotates within an eccentrically rotating fluid ring. During the circulation, the liquid ring more or less immersed in the cells formed between the wings of the impeller. As a result, the free volume in the impeller cells is alternately increased and decreased. In the circulation area in which the cell volume increases, the suction opening, through which the gas to be conveyed is sucked into the cells, is located in the front side in a control disk. In the end region of that circulation part, in which the compression takes place, there is the pressure opening through which the compressed gas is ejected into the pressure chamber of the pump.

Flüssigkeitsringgaspumpen werden sowohl als Vakuumpumpe, wo das Fördergas von einem Unterdruck auf etwa Atmosphärendruck verdichtet wird, als auch als Kompressor eingesetzt, bei denen das Fördergas von Atmosphärendruck auf einen Überdruck verdichtet wird. Flüssigkeitsringgaspumpen gibt es als einstufige und mehrstufige Ausführungen. Einstufige Flüssigkeitsringgaspumpen können aufgrund des geringeren Verdichtungsverhältnisses als Vakuumpumpe im oberen Grobvakuum bzw. als Kompressor eingesetzt werden. Zweistufige Maschinen haben ihren Vorzugseinsatzbereich als Vakuumpumpe im unteren Druckbereich des Vakuums.Liquid ring gas pumps are used both as a vacuum pump, where the delivery gas is compressed from a negative pressure to about atmospheric pressure, and as a compressor in which the delivery gas is compressed from atmospheric to an overpressure. Liquid ring gas pumps are available as single-stage and multi-stage versions. Single-stage liquid ring gas pumps can be used as a vacuum pump in the upper rough vacuum or as a compressor due to the lower compression ratio. Two-stage machines have their preferred use as a vacuum pump in the lower pressure range of the vacuum.

Die Arbeitsräume, in denen das Flügelrad rotiert und sich der Flüssigkeitsring ausbildet, sind axial einseitig oder beidseitig von einer Steuerscheibe begrenzt. Bei mehrstufigen Flüssigkeitsringpumpen sind diese Arbeitsräume mit Flügelrad und Steuerscheiben in entsprechender Anzahl axial hintereinander angeordnet.The work spaces in which the impeller rotates and the liquid ring is formed, are limited axially on one side or on both sides by a control disk. In multi-stage liquid ring pumps these work spaces with impeller and control discs are arranged axially in a corresponding number one behind the other.

Traditionell besteht eine Flüssigkeitsringgaspumpe aus einer Vielzahl von Bauteilen, die bei der Pumpenmontage in axialer Richtung aneinander angeordnet werden. Die Auflageflächen der einzelnen Bauteile sind gleichzeitig Dichtflächen der Maschine vom Pumpeninneren zur Umgebung. Axial nach außen schließen an die Steuerscheiben die äußeren Gehäuse an, in denen Kanäle oder Kammern für die Führung der Gas- und Flüssigkeitsströme enthalten sind. Auch zwischen den Steuerscheiben und den äußeren Gehäusen sind wieder abzudichtende Flächen.Traditionally, a liquid ring gas pump consists of a plurality of components which are arranged in the axial direction during pump assembly. The bearing surfaces of the individual components are simultaneously sealing surfaces of the machine from the pump interior to the environment. Axially outward close to the control discs, the outer housing, in which channels or chambers for the guidance of the gas and liquid flows are included. Also between the control discs and the outer housings are again sealed surfaces.

Die Steuerscheiben weisen Öffnungen auf, die das Zu- und Ausströmen des Fördergases vom äußeren Verdichtergehäuse in bzw. aus dem Arbeitsraum gewährleisten. Je nach Stufenzahl und Bauform der Flüssigkeitsringgaspumpe sind in diesen Steuerscheiben ein oder zwei Öffnungen für das Einströmen (Saugöffnung) bzw. Ausströmen (Drucköffnung)des Fördermediums vorgesehen. Aufgrund der Kompression des Gases in jeder Flüssigkeitsringstufe ist die Drucköffnung im allgemeinen kleiner als die Saugöffnung ausgeführt. Auf den erreichbaren Ansaugvolumenstrom und den Wirkungsgrad haben die genaue Position und die geometrischen Konturen der Öffnungen großen Einfluß. Deshalb unterscheiden sich in der Praxis auch die Form und Größe von Saug- und Drucköffnung.The control discs have openings which ensure the inflow and outflow of the conveying gas from the outer compressor housing into and out of the working space. Depending on the number of stages and Design of the liquid ring gas pump are provided in these control discs one or two openings for the inflow (suction) or outflow (pressure port) of the pumped liquid. Due to the compression of the gas in each liquid ring stage, the pressure opening is generally made smaller than the suction opening. On the achievable Ansaugvolumenstrom and the efficiency of the exact position and the geometric contours of the openings have great influence. Therefore, in practice, the shape and size of suction and pressure opening differ.

Bei dieser klassischen Pumpenkonstruktion sind die Steuerscheiben konstruktiv unterschiedlich ausgeführt. So hat zum Beispiel bei der zweistufigen Pumpe jede der vier Steuerscheiben eine andere Geometrie. Die beiden axial äußeren Steuerscheiben haben je eine Saug- und Drucköffnung; die mittlere Steuerscheibe der ersten Stufe hat nur die Drucköffnung, und die mittlere Steuerscheibe der zweiten Stufe hat nur die Saugöffnung. Da konventionell die Steuerscheiben als Gußteile ausgeführt werden, sind sogar die beiden äußeren Steuerscheiben konstruktiv verschieden, weil die Öffnungen und die Zentrierungen zum Gehäuse spiegelbildlich angeordnet sind. Der Nachteil dieser herkömmlichen Pumpenkonstruktion ist die große Zahl unterschiedlicher Bauteile, die eine hohe Komplexität in der Produktion, der Rohteilbeschaffung, der Teilebearbeitung und der Lagerhaltung verursachen. Hohe Stück- und Verarbeitungskosten sind die Folge.In this classic pump design, the control discs are structurally designed differently. For example, with the two-stage pump, each of the four control discs has a different geometry. The two axially outer control discs each have a suction and pressure port; the first stage middle control disk has only the pressure port, and the second stage middle control disk has only the suction port. Since conventionally the control discs are designed as castings, even the two outer control discs are structurally different, because the openings and the centering of the housing are arranged in mirror image. The disadvantage of this conventional pump design is the large number of different components that cause high complexity in the production, the parts procurement, the parts processing and warehousing. High piece and processing costs are the result.

Bereits bekannt sind erste Ansätze, die Steuerscheiben als ebene Scheiben mit konstanter Dicke einfacher zu gestalten ( EP 0 678 674 A2 ). Dadurch ist es möglich, symmetrische Steuerscheiben als ein einheitliches Bauteil auszuführen. In derAlready known are first approaches to simplify the control discs as flat discs with a constant thickness ( EP 0 678 674 A2 ). This makes it possible to perform symmetrical control discs as a single component. In the

Herstellung können diese Steuerscheiben aus ebenen Blechen gestanzt oder mit Lasertechnologie bearbeitet werden. Zusätzlich ist es häufig erforderlich, die angrenzenden Strömungskanäle in den benachbarten Gehäuseteilen so anzupassen, dass optimale Strömungsverhältnisse erreicht werden. So ist beim genannten Stand der Technik die Ausströmung aus dem Arbeitsraum im Druckschlitz gestuft ausgeführt, wodurch näherungsweise ein gekrümmter Strömungskanal modelliert wird.Production, these control discs can be stamped from flat sheets or processed with laser technology. In addition, it is often necessary to adapt the adjacent flow channels in the adjacent housing parts so that optimum flow conditions are achieved. Thus, in the cited prior art, the outflow from the working space is stepped in the pressure slot, whereby approximately a curved flow channel is modeled.

Durchgängig einheitliche Steuerscheiben, die als ebene Bauteile ausgeführt sind, sind bisher nur bei einstufigen Flüssigkeitsringgaspumpen eingesetzt worden, da diese bei einheitlicher Gestaltung immer eine Saugöffnung und eine Drucköffnung besitzen ( DE 10 57 284 B , DE 197 58 340 A1 ). Beispielsweise für mehrstufige Pumpen, bei denen die mittleren Steuerscheiben jeweils nur eine Öffnung haben dürfen, wären mindestens drei verschiedene Ausführungen der Steuerscheiben notwendig.Consistently uniform control discs, which are designed as flat components, have hitherto been used only in single-stage liquid ring gas pumps, since they always have a suction opening and a pressure opening when they are of uniform design ( DE 10 57 284 B . DE 197 58 340 A1 ). For example, for multi-stage pumps in which the middle control discs may have only one opening, at least three different versions of the control discs would be necessary.

Die Aufgabe der Erfindung besteht in der Schaffung einer Flüssigkeitsgasringpumpe, bei der die Anzahl unterschiedlicher Steuerscheiben verringert ist.The object of the invention is to provide a liquid gas ring pump in which the number of different control discs is reduced.

Die erfindungsgemäße Lösung besteht darin, dass nicht benötigte Öffnungen auf der vom Flügelrad abgewandten Seite durch benachbarte Gehäuseteile zu- und abgedeckt sind.The solution according to the invention is that unused openings on the side facing away from the impeller by adjacent housing parts and are covered.

Die Erfindung kann für einstufige, insbesondere aber für mehrstufige Flüssigkeitsringgaspumpen verwendet werden.The invention can be used for single-stage, but especially for multi-stage liquid ring gas pumps.

Die erfindungsgemäße Flüssigkeitsringgaspumpe wiest nur Steuerscheiben in identischer geometrischer Ausführung auf. Möglich wird dies dadurch, daß die nicht benötigten Öffnungen auf der vom Flügelrad abgewandten Seite durch benachbarte Bauteile abgedeckt werden. Dabei ist es nicht notwendig, daß in der Steuerscheibe der verbleibende offene Raum der nicht benötigten Öffnung ausgefüllt werden muß, obwohl man meinen würde, daß durch diesen zusätzlichen Raum, in dem sich auch zu pumpendes Gas befindet, der Wirkungsgrad verschlechtert wird. Erstaunlicherweise funktioniert aber die erfindungsgemäße Flüssigkeitsringgaspumpe mit den gleichen Leistungsdaten wie eine Flüssigkeitsringgaspumpe ohne die entsprechenden offenen Räume in den Steuerscheiben, da sich der jeweils außen abgedeckten Öffnung im Arbeitsraum axial gegenüber die Öffnung zu den zugehörigen Strömungskanälen befindet. In dieser Position des Flügelrads liegen während des Verdichtungsvorgangs in den benachbarten Flügelradzellen gleiche Drücke vor, wodurch praktisch keine Rückströmungen auftreten. Auch experimentell wurde nachgewiesen, daß es keinen negativen Einfluß auf den Ansaugvolumenstrom der Flüssigkeitsringgaspumpe gibt.The liquid ring gas pump according to the invention has only control disks of identical geometrical design. Possible This is because the unnecessary openings on the side facing away from the impeller are covered by adjacent components. It is not necessary that in the control disk, the remaining open space of the unneeded opening must be filled, although it would be thought that the efficiency is deteriorated by this additional space in which there is also gas to be pumped. Surprisingly, however, the liquid ring gas pump according to the invention works with the same performance data as a liquid ring gas pump without the corresponding open spaces in the control discs, since the respectively outside covered opening in the working space is axially opposite the opening to the associated flow channels. In this position of the impeller are equal pressures during the compression process in the adjacent impeller cells, whereby virtually no backflow occur. It has also been proven experimentally that there is no negative influence on the intake volume flow of the liquid ring gas pump.

Auch bei einstufigen Pumpen mit diagonaler Durchströmung, bei denen saug- bzw. druckseitig jeweils nur eine Öffnung benutzt wird, kann die Erfindung verwendet werden, wenn die jeweils nicht benutzte Saug- oder Drucköffnung abgedeckt wird. Erfindungsgemäß können daher komplette Flüssigkeitsringgaspumpenbaureihen, bestehend aus ein- und mehrstufigen Maschinen sowie aus Verdichterstufen mit unterschiedlichen axialen Längen an allen Stellen mit den gleichen einheitlichen Steuerscheiben ausgerüstet werden. Durch die Erfindung wird eine bedeutende Reduzierung der Anzahl unterschiedlicher Bauteile erzielt. Dadurch entstehen markante Einsparungen im Fertigungs- und Montageprozeß. Die Herstellungskosten einer derartigen Flüssigkeitsringgaspumpe sind daher deutlich geringer.Even with single-stage pumps with diagonal flow in which only one opening is used on the suction or pressure side, the invention can be used when the respectively unused suction or pressure opening is covered. According to the invention, therefore, complete liquid ring gas pump series consisting of single-stage and multi-stage machines as well as compressor stages with different axial lengths can be equipped at all points with the same uniform control disks. The invention achieves a significant reduction in the number of different components. This results in significant savings in the manufacturing and assembly process. The manufacturing cost of such a liquid ring gas pump are therefore significantly lower.

Vorteilhafterweise ist vorgesehen, daß die Steuerscheiben weitere für die Funktion des Verdichters erforderliche Öffnungen (Bohrungen) enthalten können, zum Beispiel für die Flüssigkeit, die wahlweise offen oder abgedeckt sind.Advantageously, it is provided that the control discs may contain further required for the function of the compressor openings (holes), for example, for the liquid, which are either open or covered.

Zweckmäßigerweise sind die einheitlichen Steuerscheiben ebene Platten und weisen eine Saugöffnung und eine Drucköffnung auf. Die einheitlichen Steuerscheiben können aber auch Gußteile sein und dann ebenfalls eine Saugöffnung und eine Drucköffnung enthalten.Expediently, the uniform control disks are flat plates and have a suction opening and a pressure opening. The uniform control discs may also be castings and then also include a suction port and a pressure port.

Wird die Steuerscheibe durch Stanzen, Laserbrennen oder Wasserstrahlschneiden erzeugt, ist in vielen Fällen keine weitere Bearbeitung erforderlich.If the control disk is produced by punching, laser burning or water jet cutting, in many cases no further processing is required.

Die Erfindung wird im folgenden anhand von vorteilhaften Ausführungsformen unter Bezugnahme auf die beigefügten Zeichnungen beschrieben. Es zeigen:

Figur 1
im Querschnitt eine Flüssigkeitsringgaspumpe des Standes der Technik;
Figur 2
eine erste Ausführungsform einer erfindungsgemäßen Flüssigkeitsringgaspumpe;
Figur 3
eine zweite Form einer erfindungsgemäßen Flüssigkeitsringgaspumpe; und
Figur 4
eine erfindungsgemäße Steuerscheibe in Draufsicht.
The invention will be described below with reference to advantageous embodiments with reference to the accompanying drawings. Show it:
FIG. 1
in cross-section, a liquid ring gas pump of the prior art;
FIG. 2
a first embodiment of a liquid ring gas pump according to the invention;
FIG. 3
a second form of a liquid ring gas pump according to the invention; and
FIG. 4
a control disk according to the invention in plan view.

Figur 1 zeigt eine konventionelle zweistufige Flüssigkeitsringgaspumpe. Diese weist zwei Flügelräder 2 auf, die in zwei Arbeitsräumen 8 angeordnet sind und von einer Welle 9 getragen werden. Axial werden die Arbeitsräume 8 durch Steuerscheiben 3, 4 begrenzt. Wie man sieht, werden vier unterschiedliche Steuerscheiben benötigt. FIG. 1 shows a conventional two-stage liquid ring gas pump. This has two impellers 2, which are arranged in two working spaces 8 and are supported by a shaft 9. Axial work spaces 8 are limited by control discs 3, 4. As you can see, four different control discs are needed.

Figur 2 zeigt in ähnlicher Darstellung eine erfindungsgemäße Pumpe, bei denen die Steuerscheiben 3, 4 mit den Saugöffnungen 6 und Drucköffnungen 7 identische miteinander ausgebildet sind. Durch eine Zwischenwand 10 ist dabei die Drucköffnung 7 der inneren Steuerscheibe 4 der linken (zweiten) Stufe und die Saugöffnung 6 der inneren Steuerscheibe 4 der rechten (ersten) Stufe abgedeckt. Die Drucköffnung der inneren Steuerscheibe 4 der rechten Stufe steht durch einen Kanal 11 mit der Saugöffnung der inneren Steuerscheibe 4 der linken Stufe in Verbindung. Mit 12 sind weitere für die Funktion der Pumpe erforderliche Öffnungen bezeichnet. FIG. 2 shows a similar representation of a pump according to the invention, in which the control discs 3, 4 are formed with the suction ports 6 and pressure ports 7 identical to each other. By an intermediate wall 10 while the pressure port 7 of the inner control disk 4 of the left (second) stage and the suction port 6 of the inner control disk 4 of the right (first) stage is covered. The pressure port of the right-hand inner control disk 4 communicates with the suction port of the left-stage inner control disk 4 through a passage 11. With 12 further openings required for the function of the pump are designated.

Figur 3 zeigt eine einstufige Pumpe, bei der die beiden Steuerscheiben 3 mit der Saugöffnung 6 und der Drucköffnung 7 identisch ausgebildet sind. FIG. 3 shows a single-stage pump, in which the two control discs 3 are formed identical to the suction port 6 and the pressure port 7.

In Figur 4 ist schließlich in Draufsicht eine Steuerscheibe 3, 4 mit der Saugöffnung 6 und der Drucköffnung 7 gezeigt.In FIG. 4 Finally, in plan view, a control disk 3, 4 with the suction port 6 and the pressure port 7 is shown.

Claims (7)

  1. Liquid ring gas pump having one or more stages, which each have a working space (8), an impeller (2) eccentrically mounted therein, control discs (3, 4) that bound the working space axially on both sides, and adjacent ducts or chambers for the supply and discharge of the conveyed gas to and from the working space (8), the control discs (3, 4) being formed identically to each other with identical suction (6) and pressure openings (7), characterized in that openings (6, 7) of the control discs (3, 4), which are not needed, are covered and shielded on the side facing away from the impeller.
  2. Liquid ring gas pump according to Claim 1, characterized in that the control discs (3, 4) contain further openings (bores) (12) that are needed for the function of the compressor, which are optionally open or covered.
  3. Liquid ring gas pump according to Claim 1 or 2, characterized in that, in a multi-stage design, in which the control discs (4) arranged between two impellers (2), need either the suction opening (6) or the pressure opening (7) only, the openings (6, 7) not needed are covered by an adjacent housing part (10).
  4. Liquid ring gas pump according to Claim 1 or 2, characterized in that, in a single-stage design, in which the control discs (3) on one side need the suction opening (6) or the pressure opening (7)only, the openings (6, 7) which are not needed are covered by the axially outer housings (5).
  5. Liquid ring gas pump according to one of Claims 1 to 4, characterized in that the standard control discs (3, 4) are flat plates and contain a suction opening (6) and a pressure opening (7).
  6. Liquid ring gas pump according to one of Claims 1 to 5, characterized in that the control discs (3, 4) are produced by punching, laser cutting or water-jet cutting.
  7. Liquid ring gas pump according to one of Claims 1 to 6, characterized in that the standard control discs (3, 4) are cast parts and contain a suction opening (6) and a pressure opening (7).
EP03011219A 2003-05-16 2003-05-16 Liquid ring gas pump Expired - Lifetime EP1477682B1 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
AT03011219T ATE391852T1 (en) 2003-05-16 2003-05-16 LIQUID RING GAS PUMP
DK03011219T DK1477682T3 (en) 2003-05-16 2003-05-16 Liquid ring pump
ES03011219T ES2303574T3 (en) 2003-05-16 2003-05-16 LIQUID RING GAS PUMP.
DE50309581T DE50309581D1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump
EP03011219A EP1477682B1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump
PT03011219T PT1477682E (en) 2003-05-16 2003-05-16 Liquid ring gas pump
TW093112251A TWI274108B (en) 2003-05-16 2004-04-30 Liquid ring gas pump
US10/556,748 US7648344B2 (en) 2003-05-16 2004-05-04 Liquid ring pump
CNB2004800134388A CN100404868C (en) 2003-05-16 2004-05-04 Liquid ring pump
PCT/EP2004/004742 WO2004102002A1 (en) 2003-05-16 2004-05-04 Liquid ring pump
CA002523958A CA2523958C (en) 2003-05-16 2004-05-04 Liquid ring pump
JP2006529735A JP4324614B2 (en) 2003-05-16 2004-05-04 Liquid ring gas pump
MYPI20041827A MY137027A (en) 2003-05-16 2004-05-14 Liquid ring gas pump
HK05103930A HK1071182A1 (en) 2003-05-16 2005-05-10 Liquid ring gas pump
ZA200507202A ZA200507202B (en) 2003-05-16 2005-09-07 Liquid ring pump
NO20054680A NO20054680L (en) 2003-05-16 2005-10-12 Ring-shaped liquid pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03011219A EP1477682B1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump

Publications (2)

Publication Number Publication Date
EP1477682A1 EP1477682A1 (en) 2004-11-17
EP1477682B1 true EP1477682B1 (en) 2008-04-09

Family

ID=33016919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03011219A Expired - Lifetime EP1477682B1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump

Country Status (16)

Country Link
US (1) US7648344B2 (en)
EP (1) EP1477682B1 (en)
JP (1) JP4324614B2 (en)
CN (1) CN100404868C (en)
AT (1) ATE391852T1 (en)
CA (1) CA2523958C (en)
DE (1) DE50309581D1 (en)
DK (1) DK1477682T3 (en)
ES (1) ES2303574T3 (en)
HK (1) HK1071182A1 (en)
MY (1) MY137027A (en)
NO (1) NO20054680L (en)
PT (1) PT1477682E (en)
TW (1) TWI274108B (en)
WO (1) WO2004102002A1 (en)
ZA (1) ZA200507202B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008009647B4 (en) * 2008-02-18 2011-04-14 Christian Dr. Koch Sludge reactor pump for simultaneous transport of solids, liquids, vapors and gases
GB2559330A (en) * 2017-01-26 2018-08-08 Ecofuel Tech Ltd Reaction pump, system and method for thermal conversion hydrocarbons
WO2018139070A1 (en) * 2017-01-30 2018-08-02 株式会社 荏原製作所 Liquid sealing type vacuum pump
KR101803843B1 (en) * 2017-08-24 2017-12-04 주식회사 백콤 Water ring vacuum pump for component change type

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057284B (en) * 1958-04-12 1959-05-14 Siemens Ag Double acting liquid ring gas pump
DE1428243A1 (en) * 1962-10-17 1969-07-10 Siemen & Hinsch Gmbh Liquid ring gas pump
DE1503605B2 (en) * 1965-04-28 1971-05-27 Siemens AG, 1000 Berlin u 8000 München CHECK VALVE FOR A LIQUID RING GAS PUMP
US4132504A (en) * 1976-04-07 1979-01-02 General Signal Corporation Liquid ring pump
DE3427628A1 (en) * 1984-07-26 1986-01-30 Sihi Gmbh & Co Kg, 2210 Itzehoe LIQUID RING COMPRESSOR
DE3617344A1 (en) * 1986-05-23 1987-11-26 Siemens Ag METHOD FOR PRODUCING A CONTROL DISC OR A CONTROL SHIELD FOR A LIQUID RING MACHINE FOR MORE AGGRESSIVE MEDIA
CN2074382U (en) * 1990-08-08 1991-04-03 武汉市硚口区永泰机械五金厂 Automatic control flow direction cycloidal rotary lubricating pump
CN2163254Y (en) * 1992-09-13 1994-04-27 吴步锋 Energy-saving radial double-acting liquid ring pump
CN2177821Y (en) * 1993-11-06 1994-09-21 张言骏 Two-stage fluid ring type vacuum pump
DE19758340A1 (en) * 1997-12-22 1999-07-08 Gardner Denver Wittig Gmbh Multi-flow liquid ring pump
DE10121800C1 (en) * 2001-05-04 2002-08-22 Siemens Ag Liquid ring pump and control disc for a liquid ring pump

Also Published As

Publication number Publication date
CN1791751A (en) 2006-06-21
CA2523958A1 (en) 2004-11-25
DE50309581D1 (en) 2008-05-21
JP4324614B2 (en) 2009-09-02
EP1477682A1 (en) 2004-11-17
US7648344B2 (en) 2010-01-19
CN100404868C (en) 2008-07-23
WO2004102002A1 (en) 2004-11-25
ATE391852T1 (en) 2008-04-15
ES2303574T3 (en) 2008-08-16
CA2523958C (en) 2008-03-18
NO20054680L (en) 2005-12-02
US20060292000A1 (en) 2006-12-28
HK1071182A1 (en) 2005-07-08
NO20054680D0 (en) 2005-10-12
TW200506215A (en) 2005-02-16
TWI274108B (en) 2007-02-21
DK1477682T3 (en) 2008-07-28
JP2007502387A (en) 2007-02-08
PT1477682E (en) 2008-06-24
ZA200507202B (en) 2006-05-31
MY137027A (en) 2008-12-31

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