EP1477681B1 - Liquid ring gas pump - Google Patents

Liquid ring gas pump Download PDF

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Publication number
EP1477681B1
EP1477681B1 EP03011218A EP03011218A EP1477681B1 EP 1477681 B1 EP1477681 B1 EP 1477681B1 EP 03011218 A EP03011218 A EP 03011218A EP 03011218 A EP03011218 A EP 03011218A EP 1477681 B1 EP1477681 B1 EP 1477681B1
Authority
EP
European Patent Office
Prior art keywords
liquid ring
housing part
housing
ring pump
pump according
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
EP03011218A
Other languages
German (de)
French (fr)
Other versions
EP1477681A1 (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 DK03011218T priority Critical patent/DK1477681T3/en
Priority to EP03011218A priority patent/EP1477681B1/en
Priority to AT03011218T priority patent/ATE337489T1/en
Priority to PT03011218T priority patent/PT1477681E/en
Priority to DE50304745T priority patent/DE50304745D1/en
Priority to ES03011218T priority patent/ES2271420T3/en
Priority to TW093112243A priority patent/TWI273173B/en
Priority to PCT/EP2004/004743 priority patent/WO2004102003A1/en
Priority to JP2006529736A priority patent/JP2006529015A/en
Priority to CA 2525480 priority patent/CA2525480C/en
Priority to CNB2004800134706A priority patent/CN100482946C/en
Priority to US10/557,304 priority patent/US7563075B2/en
Priority to MYPI20041818A priority patent/MY136591A/en
Publication of EP1477681A1 publication Critical patent/EP1477681A1/en
Priority to NO20055277A priority patent/NO20055277L/en
Application granted granted Critical
Publication of EP1477681B1 publication Critical patent/EP1477681B1/en
Priority to HK06111848.5A priority patent/HK1091251A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F04C2230/231—Manufacture essentially without removing material by permanently joining parts together by welding
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a liquid ring gas pump having a first housing part, which encloses two working spaces radially, in each of which an eccentrically rotatably mounted impeller is arranged, with second and third housing parts, which complete the first housing part and the pump on both sides and channels or chambers for supply and Having discharge of the delivered gas, with at least one of second leading to the third housing part connecting channel and with the working spaces in the axial direction limiting control discs.
  • 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 delivered 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, as well 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. Multi-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.
  • a liquid ring gas pump (cf, for example, DE 27 14 475 A) consists of a multiplicity of components which are arranged in the axial direction against each other during pump assembly.
  • the bearing surfaces of the individual components are simultaneously sealing surfaces of the machine from the pump interior to the environment.
  • Such a conventional liquid ring gas pump has in two-stage design seven axial sealing surfaces (DE 27 14 475). Consequently, the assembly is expensive and the construction expensive and also has the disadvantage of a variety of surfaces to be sealed, in particular a greater risk of early leaking in operation.
  • the object of the invention is to provide a liquid ring gas pump of the type mentioned, in which the number of items and in particular the number of sealing surfaces is greatly reduced to the outside.
  • the first housing part is formed in one piece, and has an integrally formed with the first housing part intermediate wall for receiving inner control discs between the two working spaces.
  • the intermediate wall may comprise at least one channel for passing the conveyed gas .
  • the invention is applicable to two-stage liquid ring gas pumps.
  • the first housing part has not more than two surfaces connected to the work spaces, with which it adjoins other housing parts or other attachments.
  • the construction of the pump is further simplified if the first housing part has connections for emptying and / or emptying, cavitation protection and suction-side ventilation.
  • the housing parts may be formed in an advantageous embodiment as a cast construction. In another advantageous embodiment, the housing parts are designed as a welded construction.
  • a particularly simple assembly is possible if the first housing part has fastening elements for axial clamping with the second and third housing parts.
  • the construction according to the invention is characterized by a low number of components and few sealing surfaces to the outside. This results in significant advantages in the manufacturing and assembly process as well as in the reliability of the novel liquid ring gas pump. A particular advantage is also that the second and third housing parts can be identical, which also reduces the manufacturing cost and storage costs for spare parts.
  • FIG. 1 shows in cross section a conventional liquid ring gas pump.
  • In workrooms A are eccentrically mounted on a shaft B impellers C.
  • the work spaces A are partially with a liquid, in particular water filled, so that the cells between the wings of the impellers due to the liquid ring enlarge and reduce, whereby the pumping action is achieved.
  • At the end faces of the impellers C are control discs D, in the embodiment of Figure 1 so four such control discs.
  • Housing parts E limit the work spaces in the radial direction to the outside.
  • FIG. 1 shows in cross section a conventional liquid ring gas pump.
  • the two-stage pump according to the invention which is shown in Figure 2, also has two impellers 1, which are mounted on a shaft 11 and rotate in the eccentric working spaces 16.
  • At the outer end faces of the impellers 1 are control discs 2;
  • In the middle between the impellers 1 are control discs 3, wherein the control discs are provided with suitable openings through which enters the gas to be pumped into the working spaces 16 and exits.
  • Fig. 2 there is shown a connecting passage 13 connecting the suction port 14 of the left (second) stage with the pressure port 15 of the right (first) stage, whereby a partial flow of the conveying gas from the right (first) stage to the left (second) stage is directed.
  • the respective other opening of the middle control discs 3 is covered by the middle wall 8 and thus functionless.
  • This middle wall 8 is part of a first housing part 5, which surrounds the working spaces 16.
  • This first Housing part 5 has a further connecting channel 7 for the gas flows within the pump.
  • a second partial flow of the delivery gas is passed from the pressure port 17 of the right (first) stage to the suction port 18 of the left (second) stage.
  • the outer wall 6, which limits the working space 16, the intermediate wall 8 and the connecting channel 7 are integrally formed. Further components are the left and right of the first housing part 1 arranged second and third housing parts 4, which may be identical. The only sealing surfaces to the outside are the sealing surfaces between the first housing and the second housing 4. These sealing surfaces are designated 9. With 19 screws are designated by which the housing parts 1, 4 are fastened together.

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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)
  • Fluid-Pressure Circuits (AREA)
  • Rotary Pumps (AREA)
  • Gyroscopes (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • External Artificial Organs (AREA)

Abstract

The fluid ring gas pump has a housing section (5) to take one or two working zones (16), as a radial shrouding around them. Each zone has a vane wheel (1) on an eccentric mounting. Two further housing sections (4) flank the first housing section and the pump on both sides, with channels or chambers for the inflow and outflow of the carrier gas. The working zones are defined axially on both sides by control disks (2,3). The first housing section is a one-piece unit, with a connecting channel (7) to link the side housing sections together. The openings at the center housing section are set so that the side housing sections are of an identical design.

Description

Die Erfindung betrifft eine Flüssigkeitsringgaspumpe mit einem ersten Gehäuseteil, der zwei Arbeitsräume radial umschließt, in denen jeweils ein exzentrisch drehbar gelagertes Flügelrad angeordnet ist, mit zweiten und dritten Gehäuseteilen, die den ersten Gehäuseteil und die Pumpe beidseitig abschließen und Kanäle oder Kammern für Zu- und Abführung des geförderten Gases aufweisen, mit mindestens einem von zweiten zum dritten Gehäuseteil führenden Verbindungskanal und mit die Arbeitsräume in Axialrichtung begrenzenden Steuerscheiben.The invention relates to a liquid ring gas pump having a first housing part, which encloses two working spaces radially, in each of which an eccentrically rotatably mounted impeller is arranged, with second and third housing parts, which complete the first housing part and the pump on both sides and channels or chambers for supply and Having discharge of the delivered gas, with at least one of second leading to the third housing part connecting channel and with the working spaces in the axial direction limiting control discs.

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 delivered 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. Mehrstufige 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, as well 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. Multi-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 (vgl. etwa DE 27 14 475 A) 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 (cf, for example, DE 27 14 475 A) consists of a multiplicity of components which are arranged in the axial direction against each other 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.

Eine derartige herkömmliche Flüssigkeitsringgaspumpe hat in zweistufiger Bauweise sieben axiale Dichtflächen (DE 27 14 475). Demzufolge ist die Montage aufwendig und die Bauweise teuer und hat auch den Nachteil einer Vielzahl abzudichtender Flächen, insbesondere ein größeres Risiko eines frühen Undichtwerdens im Betrieb.Such a conventional liquid ring gas pump has in two-stage design seven axial sealing surfaces (DE 27 14 475). Consequently, the assembly is expensive and the construction expensive and also has the disadvantage of a variety of surfaces to be sealed, in particular a greater risk of early leaking in operation.

Bei zweistufigen Flüssigkeitsringverdichtern ist eine weitverbreitete Konstruktion mit einem diagonalen Verbindungsrohr versehen, mit dem ein Teil des zu verdichtenden Gases und der Betriebsflüssigkeit außen von der Drucköffnung der ersten Stufe hin zur Saugöffnung der zweiten Stufe geleitet wird (DE-PS 870 004). Da dieses Verbindungsrohr beidseitig auf Gehäusestutzen aufgesetzt wird, sind hier zwei weitere Dichtflächen vorhanden. Die Nachteile dieser klassischen Konstruktionen sind die große Anzahl von Einzelteilen mit entsprechend hohen Fertigungskosten für die Bearbeitung der vielen Oberflächen sowie die vielen abzudichtenden Flächen zwischen den Pumpenbauteilen.In two-stage liquid ring compressors, a widely used construction is provided with a diagonal connection pipe, with which a part of the gas to be compressed and the working fluid is directed from the first stage pressure port to the second stage suction port (DE-PS 870 004). Since this connecting tube is placed on both sides of the housing neck, here are two more sealing surfaces available. The disadvantages of these classic constructions are the large number of individual parts with correspondingly high production costs for machining the many surfaces and the many surfaces to be sealed between the pump components.

Bereits bekannt sind verschiedene Ansätze, Pumpenteile zu vereinfachen bzw. mehrere Pumpenbauteile zu verschmelzen und so die Teilezahl der Flüssigkeitsringgaspumpen zu reduzieren. Z. B. ist es bekannt, eine Steuerscheibe mit dem Mittelkörper als ein Bauteil auszuführen (Zeichnung Travaini-Pumpen TRHC 40-60). Es ist auch ein einstufiger Flüssigkeitsringverdichter bekannt, bei dem die Aufteilung der saugseitigen Gasströme und die Zusammenführung der druckseitigen Gasströme nicht außerhalb des Verdichters durch sogenannte Hosenrohre erfolgt, sondern der Gasstrom nur in einer Gehäuseseite angeschlossen ist und die Aufteilung auf die jeweils andere Gehäuseseite durch gerade Rohre erfolgt (EP 0 584 106 B1). Es ist auch bekannt, alle axialen Strömungskanäle im mittleren Gehäuseteil unterzubringen (DE 197 58 340 A1). Der Nachteil dieser Ausführungsform ist, dass sie nur für einstufige Flüssigkeitsringgaspumpen anwendbar ist.Already known are various approaches to simplify pump parts or merge several pump components and so reduce the number of parts of the liquid ring gas pumps. For example, it is known to perform a control disc with the center body as a component (drawing Travaini pumps TRHC 40-60). It is also known a single-stage liquid ring compressor, in which the division of the suction gas flows and the merger of the pressure-side gas flows is not outside the compressor by so-called bottlenecks, but the gas flow is connected only in one side of the housing and the division of the other side of the housing by straight tubes takes place (EP 0 584 106 B1). It is also known to accommodate all axial flow channels in the middle housing part (DE 197 58 340 A1). The disadvantage of this embodiment is that it is only applicable to single-stage liquid ring gas pumps.

Die Aufgabe der Erfindung besteht in der Schaffung einer Flüssigkeitsringgaspumpe der Eingangs genannten Art, bei der die Anzahl der Einzelteile und insbesondere die Zahl der Dichtflächen nach außen stark verringert ist.The object of the invention is to provide a liquid ring gas pump of the type mentioned, in which the number of items and in particular the number of sealing surfaces is greatly reduced to the outside.

Die erfindungsgemäße Lösung besteht darin, dass der erste Gehäuseteil einstückig ausgebildet ist, und eine mit dem ersten Gehäuseteil einstückig ausgebildete Zwischenwand zum Aufnehmen von inneren Steuerscheiben zwischen den beiden Arbeitsräumen aufweist. Insbesondere kann die Zwischenwand mindestens einen Kanal zum Durchleiten des geförderten Gases umfassen.The solution according to the invention is that the first housing part is formed in one piece, and has an integrally formed with the first housing part intermediate wall for receiving inner control discs between the two working spaces. In particular, the intermediate wall may comprise at least one channel for passing the conveyed gas .

Die Erfindung ist anwendbar für zweistufige Flüssigkeitsringgaspumpen.The invention is applicable to two-stage liquid ring gas pumps.

Bei einer vorteilhaften Ausführungsform weist das erste Gehäuseteil nicht mehr als zwei mit den Arbeitsräumen verbundene Flächen auf, mit denen es an andere Gehäuseteile oder sonstige Anbauteile angrenzt. In an advantageous embodiment, the first housing part has not more than two surfaces connected to the work spaces, with which it adjoins other housing parts or other attachments.

Der Aufbau der Pumpe wird weiter vereinfacht, wenn der erste Gehäuseteil Anschlüsse für Entleerung und/oder Schmutzentleerung, Kavitationsschutz sowie die saugseitige Belüftung aufweist.The construction of the pump is further simplified if the first housing part has connections for emptying and / or emptying, cavitation protection and suction-side ventilation.

Die Gehäuseteile können bei einer vorteilhaften Ausführungsform als Gusskonstruktion ausgebildet sein. Bei einer anderen vorteilhaften Ausführungsform sind die Gehäuseteile als Schweißkonstruktion ausgebildet.The housing parts may be formed in an advantageous embodiment as a cast construction. In another advantageous embodiment, the housing parts are designed as a welded construction.

Ein besonders einfacher Zusammenbau ist möglich, wenn der erste Gehäuseteil Befestigungselemente zur axialen Verspannung mit den zweiten und dritten Gehäuseteilen aufweist.A particularly simple assembly is possible if the first housing part has fastening elements for axial clamping with the second and third housing parts.

Die erfindungsgemäße Flüssigkeitsringgaspumpe beinhaltet in einem einzigen Bauteil, nämlich dem erfindungsgemäßen ersten Gehäuseteil, folgende bisherigen Bauteile bzw. Funktionen:

  • zweifach den klassischen rohrartigen Mittelkörper,
  • das Verbindungsrohr, das die Strömung von der ersten zur zweiten Stufe leitet,
  • die Halterung der mittleren, jetzt besonders einfach als ebene Scheiben zu gestaltenden Steuerscheiben,
  • die äußeren Steuerscheiben können zwischen erstem Gehäuse und dem zweiten bzw. dritten Gehäuse so verspannt werden, dass keine zweifache äußere Abdichtung erforderlich ist;
  • die Gesamtzahl der Dichtflächen wird von maximal neun auf jetzt nur noch zwei Dichtflächen reduziert. Bei der herkömmlichen zweistufigen Pumpe gab es sieben Dichtflächen zwischen den Steuerscheiben, Mittelkörpern und äußeren Gehäusen sowie zwei zwischen den Gehäusen und dem Verbindungsrohr.
The liquid ring gas pump according to the invention comprises in a single component, namely the first housing part according to the invention, the following previous components or functions:
  • twice the classic tubular centerbody,
  • the connecting tube, which conducts the flow from the first to the second stage,
  • the holder of the middle, now particularly easy to be designed as a flat slices control discs,
  • the outer control discs can be clamped between the first housing and the second or third housing so that no two-fold outer seal is required;
  • The total number of sealing surfaces is reduced from a maximum of nine to only two sealing surfaces. In the conventional two-stage pump, there were seven sealing surfaces between the control disks, center bodies and outer housings and two between the housings and the connecting pipe.

Die erfindungsgemäße Konstruktion zeichnet sich durch eine geringe Bauteilezahl und wenige Dichtflächen nach außen aus. Dadurch entstehen deutliche Vorteile beim Fertigungs- und Montageprozess sowie in der Betriebssicherheit der neuartigen Flüssigkeitsringgaspumpe. Ein besonderer Vorteil ist dabei auch, dass die zweiten und dritten Gehäuseteile identisch ausgebildet sein können, was ebenfalls die Herstellungskosten und die Lagerhaltungskosten für Ersatzteile verringert.The construction according to the invention is characterized by a low number of components and few sealing surfaces to the outside. This results in significant advantages in the manufacturing and assembly process as well as in the reliability of the novel liquid ring gas pump. A particular advantage is also that the second and third housing parts can be identical, which also reduces the manufacturing cost and storage costs for spare parts.

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

Figur 1
im Querschnitt eine konventionelle Flüssigkeitsringgaspumpe;
Figur 2
im Querschnitt eine erste Ausführungsform einer erfindungsgemäßen Flüssigkeitsringgaspumpe; und
The invention will be described below with reference to advantageous embodiments with reference to the accompanying drawings, for example. Show it:
FIG. 1
in cross section a conventional liquid ring gas pump;
FIG. 2
in cross section a first embodiment of a liquid ring gas pump according to the invention; and

In Figur 1 ist im Querschnitt eine konventionelle Flüssigkeitsringgaspumpe gezeigt. In Arbeitsräumen A sind exzentrisch auf einer Welle B Flügelräder C gelagert. Die Arbeitsräume A sind dabei teilweise mit einer Flüssigkeit, insbesondere Wasser gefüllt, so dass sich die Zellen zwischen den Flügeln der Flügelräder aufgrund des Flüssigkeitsrings vergrößern und verkleinern, wodurch die Pumpwirkung erzielt wird. An der Stirnseiten der Flügelräder C befinden sich Steuerscheiben D, bei der Ausführungsform der Figur 1 also vier solche Steuerscheiben. Gehäuseteile E begrenzen die Arbeitsräume in radialer Richtung nach außen. An den beiden Enden gibt es noch Gehäuseteile F, die die erforderlichen Kanäle oder Kammern für die Zufuhr und Abfuhr des zu pumpenden Gases aufweisen. Wie man in Figur 1 deutlich sieht, sind in axialer Richtung sehr viele Bauteile aufeinanderfolgend zusammengesetzt, wobei an den Verbindungsstellen jeweils eine Dichtung nach außen vorgesehen sein muss.FIG. 1 shows in cross section a conventional liquid ring gas pump. In workrooms A are eccentrically mounted on a shaft B impellers C. The work spaces A are partially with a liquid, in particular water filled, so that the cells between the wings of the impellers due to the liquid ring enlarge and reduce, whereby the pumping action is achieved. At the end faces of the impellers C are control discs D, in the embodiment of Figure 1 so four such control discs. Housing parts E limit the work spaces in the radial direction to the outside. At the two ends there are still housing parts F, which have the required channels or chambers for the supply and discharge of the gas to be pumped. As can be clearly seen in FIG. 1, a great many components are assembled successively in the axial direction, wherein a seal must be provided at the connecting points in each case to the outside.

Die erfindungsgemäße zweistufige Pumpe, die in Figur 2 gezeigt ist, weist ebenfalls zwei Flügelräder 1 auf, die auf einer Welle 11 angebracht und in den exzentrischen Arbeitsräumen 16 rotieren. An den äußeren Stirnseiten der Flügelräder 1 befinden sich Steuerscheiben 2; in der Mitte zwischen den Flügelrädern 1 befinden sich Steuerscheiben 3, wobei die Steuerscheiben mit geeigneten Öffnungen versehen sind, durch die das zu pumpende Gas in die Arbeitsräume 16 eintritt bzw. austritt. In Figur 2 ist ein Verbindungskanal 13 gezeigt, der die Saugöffnung 14 der linken (zweiten) Stufe mit der Drucköffnung 15 der rechten (ersten) Stufe verbindet, womit ein Teilstrom des Fördergases von der rechten (ersten) Stufe in die linke (zweite) Stufe geleitet wird. Die jeweils andere Öffnung der mittleren Steuerscheiben 3 ist durch die mittlere Wand 8 abgedeckt und damit funktionslos. Diese mittlere Wand 8 ist Teil eines ersten Gehäuseteils 5, der die Arbeitsräume 16 umgibt. Dieser erste Gehäuseteil 5 weist einen weiteren Verbindungskanal 7 für die Gasströme innerhalb der Pumpe auf. Bei der zweistufigen Pumpe wird darüber ein zweiter Teilstrom des Fördergases von der Drucköffnung 17 der rechten (ersten) Stufe zur Saugöffnung 18 der linken (zweiten) Stufe geleitet.The two-stage pump according to the invention, which is shown in Figure 2, also has two impellers 1, which are mounted on a shaft 11 and rotate in the eccentric working spaces 16. At the outer end faces of the impellers 1 are control discs 2; In the middle between the impellers 1 are control discs 3, wherein the control discs are provided with suitable openings through which enters the gas to be pumped into the working spaces 16 and exits. In Fig. 2, there is shown a connecting passage 13 connecting the suction port 14 of the left (second) stage with the pressure port 15 of the right (first) stage, whereby a partial flow of the conveying gas from the right (first) stage to the left (second) stage is directed. The respective other opening of the middle control discs 3 is covered by the middle wall 8 and thus functionless. This middle wall 8 is part of a first housing part 5, which surrounds the working spaces 16. This first Housing part 5 has a further connecting channel 7 for the gas flows within the pump. In the two-stage pump, a second partial flow of the delivery gas is passed from the pressure port 17 of the right (first) stage to the suction port 18 of the left (second) stage.

Wie man sieht, sind die äußere Wand 6, die den Arbeitsraum 16 begrenzt, die Zwischenwand 8 und der Verbindungskanal 7 einstückig ausgebildet. Weitere Bauteile sind die links und rechts vom ersten Gehäuseteil 1 angeordneten zweiten und dritten Gehäuseteile 4, die identisch ausgebildet sein können. Die einzigen Dichtflächen nach außen sind die Dichtflächen zwischen dem ersten Gehäuse und dem zweiten Gehäuse 4. Diese Dichtflächen sind mit 9 bezeichnet. Mit 19 sind Schrauben bezeichnet, mit denen die Gehäuseteile 1, 4 aneinander befestigt werden.As can be seen, the outer wall 6, which limits the working space 16, the intermediate wall 8 and the connecting channel 7 are integrally formed. Further components are the left and right of the first housing part 1 arranged second and third housing parts 4, which may be identical. The only sealing surfaces to the outside are the sealing surfaces between the first housing and the second housing 4. These sealing surfaces are designated 9. With 19 screws are designated by which the housing parts 1, 4 are fastened together.

Claims (7)

  1. Liquid ring pump having a first housing part (5) which encloses two working spaces (16) radially, in which in each case there is arranged an eccentrically rotatably mounted impeller (1), having second and third housing parts (4), which seal off the first housing part (5) and the pump on both sides and have ducts or chambers for the supply and discharge of the gas conveyed, having at least one connecting duct (7) leading from the second to the third housing part and having control discs (2, 3) that bound the working spaces (16) in the axial direction, characterized in that the first housing part (5) is formed in one piece, and comprises an intermediate wall (8) which is formed in one piece with the first housing part between the two stages, for accommodating the inner control discs (3).
  2. Liquid ring pump according to Claim 1, characterized in that the intermediate wall (8) has at least one duct (13) to lead the conveyed gas through.
  3. Liquid ring pump according to Claim 1 or 2, characterized in that the first housing part has no more than two surfaces (9) which are connected to the working spaces (16) and with which it adjoins other housing parts or other fitted parts.
  4. Liquid ring pump according to one of Claims 1 to 3 characterized in that the first housing part (5) has connections for emptying and/or emptying dirt (10), for cavitation prevention (11) and for venting (12) on the suction side.
  5. Liquid ring pump according to one of Claims 1 to 4, characterized in that the housing parts (4, 5) are formed as a cast construction.
  6. Liquid ring pump according to one of Claims 1 to 4, characterized in that the housing parts (4, 5) are formed as a welded construction.
  7. Liquid ring pump according to one of Claims 1 to 6, characterized in that the first housing part (5) has fixing elements (19) to be clamped axially with the second and third housing parts (4).
EP03011218A 2003-05-16 2003-05-16 Liquid ring gas pump Expired - Lifetime EP1477681B1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
DK03011218T DK1477681T3 (en) 2003-05-16 2003-05-16 Liquid ring pump
EP03011218A EP1477681B1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump
AT03011218T ATE337489T1 (en) 2003-05-16 2003-05-16 LIQUID RING GAS PUMP
PT03011218T PT1477681E (en) 2003-05-16 2003-05-16 Liquid ring gas pump
DE50304745T DE50304745D1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump
ES03011218T ES2271420T3 (en) 2003-05-16 2003-05-16 HYDRORROTATIVE GAS PUMP.
TW093112243A TWI273173B (en) 2003-05-16 2004-04-30 Liquid ring gas pump
JP2006529736A JP2006529015A (en) 2003-05-16 2004-05-04 Liquid ring pump
PCT/EP2004/004743 WO2004102003A1 (en) 2003-05-16 2004-05-04 Liquid ring pump
CA 2525480 CA2525480C (en) 2003-05-16 2004-05-04 Liquid ring pump
CNB2004800134706A CN100482946C (en) 2003-05-16 2004-05-04 Liquid ring pump
US10/557,304 US7563075B2 (en) 2003-05-16 2004-05-04 Liquid ring pump
MYPI20041818A MY136591A (en) 2003-05-16 2004-05-14 Liquid ring gas pump
NO20055277A NO20055277L (en) 2003-05-16 2005-11-09 Ring-shaped liquid pump
HK06111848.5A HK1091251A1 (en) 2003-05-16 2006-10-26 Liquid ring pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03011218A EP1477681B1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump

Publications (2)

Publication Number Publication Date
EP1477681A1 EP1477681A1 (en) 2004-11-17
EP1477681B1 true EP1477681B1 (en) 2006-08-23

Family

ID=33016918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03011218A Expired - Lifetime EP1477681B1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump

Country Status (15)

Country Link
US (1) US7563075B2 (en)
EP (1) EP1477681B1 (en)
JP (1) JP2006529015A (en)
CN (1) CN100482946C (en)
AT (1) ATE337489T1 (en)
CA (1) CA2525480C (en)
DE (1) DE50304745D1 (en)
DK (1) DK1477681T3 (en)
ES (1) ES2271420T3 (en)
HK (1) HK1091251A1 (en)
MY (1) MY136591A (en)
NO (1) NO20055277L (en)
PT (1) PT1477681E (en)
TW (1) TWI273173B (en)
WO (1) WO2004102003A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2507089A (en) 2012-10-18 2014-04-23 Ccl Group Ltd An anchor having expanded sections in multi wired tendons
AU2015310560B2 (en) * 2014-09-04 2019-02-21 Scoprega S.P.A. Volumetric compressor
GB2571972B (en) * 2018-03-14 2021-01-20 Edwards Tech Vacuum Engineering Qingdao Co Ltd Method and apparatus related to servicing of liquid ring pumps

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1662250A (en) * 1926-06-11 1928-03-13 Irving C Jennings Method and apparatus relating to motor-driven pumps
US1699327A (en) * 1926-08-02 1929-01-15 Jr Augustus C Durdin Displacement apparatus
US2416538A (en) * 1944-11-04 1947-02-25 Arthur J Nelson Hydroturbine pump
DE1428243A1 (en) * 1962-10-17 1969-07-10 Siemen & Hinsch Gmbh Liquid ring gas pump
IT1085211B (en) * 1976-04-07 1985-05-28 Gen Signal Corp LIQUID RING PUMP
DE3111538A1 (en) * 1981-03-24 1982-10-21 Siemens AG, 1000 Berlin und 8000 München LIQUID RING PUMP WITH A CONTROL DISC ARRANGED BETWEEN THE IMPELL WHEEL HOUSING AND THE LID PROVIDED WITH CONNECTORS
JPS61167196A (en) * 1985-08-21 1986-07-28 Nakamura Suikan:Kk One step operation side air port type water ring pump
US4747752A (en) * 1987-04-20 1988-05-31 Somarakis, Inc. Sealing and dynamic operation of a liquid ring pump
EP0367845B1 (en) * 1988-11-07 1991-12-18 Siemens Aktiengesellschaft Liquid ring pump
JPH086698B2 (en) * 1991-07-18 1996-01-29 株式会社荏原製作所 Liquid ring pump
DE19758340A1 (en) * 1997-12-22 1999-07-08 Gardner Denver Wittig Gmbh Multi-flow liquid ring pump

Also Published As

Publication number Publication date
ES2271420T3 (en) 2007-04-16
WO2004102003A1 (en) 2004-11-25
CA2525480C (en) 2008-08-05
TW200506214A (en) 2005-02-16
DK1477681T3 (en) 2007-01-02
NO20055277D0 (en) 2005-11-09
PT1477681E (en) 2006-12-29
DE50304745D1 (en) 2006-10-05
US20070065298A1 (en) 2007-03-22
ATE337489T1 (en) 2006-09-15
CN1791752A (en) 2006-06-21
CA2525480A1 (en) 2004-11-25
NO20055277L (en) 2005-12-02
MY136591A (en) 2008-10-31
JP2006529015A (en) 2006-12-28
EP1477681A1 (en) 2004-11-17
US7563075B2 (en) 2009-07-21
HK1091251A1 (en) 2007-01-12
TWI273173B (en) 2007-02-11
CN100482946C (en) 2009-04-29

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