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EP1477681A1 - Liquid ring gas pump - Google Patents

Liquid ring gas pump Download PDF

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Publication number
EP1477681A1
EP1477681A1 EP03011218A EP03011218A EP1477681A1 EP 1477681 A1 EP1477681 A1 EP 1477681A1 EP 03011218 A EP03011218 A EP 03011218A EP 03011218 A EP03011218 A EP 03011218A EP 1477681 A1 EP1477681 A1 EP 1477681A1
Authority
EP
European Patent Office
Prior art keywords
liquid ring
ring gas
gas pump
housing part
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.)
Granted
Application number
EP03011218A
Other languages
German (de)
French (fr)
Other versions
EP1477681B1 (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 EP03011218A priority Critical patent/EP1477681B1/en
Priority to PT03011218T priority patent/PT1477681E/en
Priority to DK03011218T priority patent/DK1477681T3/en
Priority to AT03011218T priority patent/ATE337489T1/en
Priority to ES03011218T priority patent/ES2271420T3/en
Priority to DE50304745T priority patent/DE50304745D1/en
Priority to TW093112243A priority patent/TWI273173B/en
Priority to JP2006529736A priority patent/JP2006529015A/en
Priority to US10/557,304 priority patent/US7563075B2/en
Priority to CA 2525480 priority patent/CA2525480C/en
Priority to HK06111848.5A priority patent/HK1091251B/en
Priority to PCT/EP2004/004743 priority patent/WO2004102003A1/en
Priority to CNB2004800134706A priority patent/CN100482946C/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
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 with a first housing part, the one or two working spaces radially encloses, in each of which an eccentrically rotatably mounted Impeller is arranged, with second and third housing parts, which the first housing part and the pump on both sides complete and channels or chambers for supply and discharge of the extracted gas, and with which the work rooms control disks limiting in the axial direction
  • an impeller runs inside of an eccentrically circling liquid ring. While of the circulation the liquid ring is more or less submerged far into those formed between the vanes of the impeller Cells. This creates the free volume in the impeller cells alternately enlarged and reduced. In that one Circulation area in which the cell volume increases, the suction opening is located on the front of a control disc, through which the gas to be pumped is sucked into the cells becomes. In the end area of the circulation part in which there is the compression takes place, there is the pressure opening, through which the compressed gas enters the pressure chamber of the pump is pushed out.
  • Liquid ring gas pumps are used both as vacuum pumps where the conveying gas from a negative pressure to approximately atmospheric pressure is compressed, as well as used as a compressor in which the conveying gas from atmospheric pressure to overpressure is compressed.
  • Liquid ring gas pumps are available as single-stage and multi-stage versions. Single stage liquid ring gas pumps can due to the lower compression ratio as a vacuum pump in the upper rough vacuum or can be used as a compressor. Have two-stage machines its preferred area of application as a vacuum pump in the lower pressure range of the vacuum.
  • the work rooms in which the impeller rotates and the Liquid ring forms, are axially on one or both sides limited by a control disc.
  • multi-level Liquid ring pumps are these working spaces with an impeller and control discs in a corresponding number axially one behind the other arranged.
  • a liquid ring gas pump consists of one Large number of components used in pump assembly in axial Towards each other.
  • the contact surfaces of the individual components are simultaneously sealing surfaces of the machine from inside the pump to the environment. Close axially outwards to the control discs on the outer housing, in which channels or chambers for guiding the gas and liquid flows are included. Also between the control discs and the outer ones Housings are surfaces to be sealed again.
  • Such a conventional liquid ring gas pump has in single-stage design, four axial sealing surfaces and two-stage Construction even seven axial sealing surfaces.
  • the assembly is complex and the construction expensive and also has the disadvantage of a large number of surfaces to be sealed, in particular a greater risk of early leakage in the company.
  • the object of the invention is to create a Liquid ring gas pump of the type mentioned, in which the number of individual parts and in particular the number of Sealing surfaces to the outside is greatly reduced.
  • the solution according to the invention is that the first housing part is integrally formed, at least one of second connecting channel leading to the third housing part is provided and that to the adjacent housing part directed openings are designed so that the second and third housing parts can be configured identically are.
  • the invention is applicable for single and two-stage liquid ring gas pumps. If the liquid ring gas pump has two stages is advantageously formed, the first Housing part devices for receiving inner control disks between the two levels, in particular one Partition wall with at least one channel for passage of the extracted gas.
  • the invention Liquid ring gas pump only two to be sealed to the outside Connection points, namely in particular the connection points adjacent housing parts.
  • the construction of the pump is further simplified if the first Housing part connections for emptying and / or dirt emptying, Cavitation protection and ventilation on the suction side.
  • the housing parts can be designed as a cast construction.
  • Another one advantageous embodiment are the housing parts as Welded construction trained.
  • the construction according to the invention is characterized by a small number of components and few sealing surfaces to the outside. This creates significant advantages in manufacturing and Assembly process and the operational safety of the new Liquid ring gas pump. There is a particular advantage also that the second and third housing parts are identical can be of the same design, which is also the manufacturing cost and reduces the cost of storing spare parts.
  • FIG. 1 is a conventional liquid ring gas pump in cross section shown.
  • workrooms A are eccentric on a shaft B impellers C.
  • the work rooms A are partially with a liquid, in particular Water filled so that the cells are between the wings enlarge the impellers due to the liquid ring and reduce, thereby achieving the pumping effect.
  • Housing parts E limit the work spaces in the radial direction to the outside.
  • At both ends there are still housing parts F that have the required channels or chambers for the supply and discharge of the gas to be pumped exhibit.
  • housing parts F are in axial In the direction of very many components assembled in succession, with a seal at the connection points must be provided to the outside.
  • the two-stage pump according to the invention shown in Figure 2 is also has two impellers 1, which a shaft 11 attached and in the eccentric workrooms 16 rotate.
  • a connecting channel 13 is shown, the the suction opening 14 of the left (second) stage with the pressure opening 15 of the right (first) stage connects with what Partial flow of the conveying gas from the right (first) stage in the left (second) stage is headed.
  • the other one Opening of the middle control discs 3 is through the middle Wall 8 covered and therefore inoperative.
  • This middle wall 8 is part of a first housing part 5, which the working spaces 16 surrounds.
  • This first housing part 5 has another Connection channel 7 for the gas flows within the pump.
  • a second partial flow is created of the conveying gas from the pressure opening 17 of the right (first) Stage led to the suction opening 18 of the left (second) stage.
  • Other components are the left and to the right of the first housing part 1 arranged second and third housing parts 4, which can be identical.
  • the only outside sealing surfaces are the sealing surfaces between the first housing and the second housing 4. These sealing surfaces are designated 9.
  • At 19 are screws referred to, with which the housing parts 1, 4 to each other be attached.
  • connection channel 7 the task of printing on both sides of the Control discs to combine 2 emerging gas flows.
  • connection channel for the Suction side is also present, but not in Figure 3 shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Rotary Pumps (AREA)
  • External Artificial Organs (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Gyroscopes (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, das einen bzw. zwei Arbeitsräume radial umschließt, in dem 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, und mit den die Arbeitsräume in Axialrichtung begrenzenden SteuerscheibenThe invention relates to a liquid ring gas pump with a first housing part, the one or two working spaces radially encloses, in each of which an eccentrically rotatably mounted Impeller is arranged, with second and third housing parts, which the first housing part and the pump on both sides complete and channels or chambers for supply and discharge of the extracted gas, and with which the work rooms control disks limiting in the axial direction

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 runs inside of an eccentrically circling liquid ring. While of the circulation the liquid ring is more or less submerged far into those formed between the vanes of the impeller Cells. This creates the free volume in the impeller cells alternately enlarged and reduced. In that one Circulation area in which the cell volume increases, the suction opening is located on the front of a control disc, through which the gas to be pumped is sucked into the cells becomes. In the end area of the circulation part in which there is the compression takes place, there is the pressure opening, through which the compressed gas enters the pressure chamber of the pump is pushed out.

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 vacuum pumps where the conveying gas from a negative pressure to approximately atmospheric pressure is compressed, as well as used as a compressor in which the conveying gas from atmospheric pressure to overpressure is compressed. Liquid ring gas pumps are available as single-stage and multi-stage versions. Single stage liquid ring gas pumps can due to the lower compression ratio as a vacuum pump in the upper rough vacuum or can be used as a compressor. Have two-stage machines its preferred area of application 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 rooms in which the impeller rotates and the Liquid ring forms, are axially on one or both sides limited by a control disc. With multi-level Liquid ring pumps are these working spaces with an impeller and control discs in a corresponding number axially one behind the other arranged.

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 one Large number of components used in pump assembly in axial Towards each other. The contact surfaces of the individual components are simultaneously sealing surfaces of the machine from inside the pump to the environment. Close axially outwards to the control discs on the outer housing, in which channels or chambers for guiding the gas and liquid flows are included. Also between the control discs and the outer ones Housings are surfaces to be sealed again.

Eine derartige herkömmliche Flüssigkeitsringgaspumpe hat in einstufiger Bauweise vier axiale Dichtflächen und in zweistufiger Bauweise sogar sieben axiale Dichtflächen. 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 single-stage design, four axial sealing surfaces and two-stage Construction even seven axial sealing surfaces. As a result, the assembly is complex and the construction expensive and also has the disadvantage of a large number of surfaces to be sealed, in particular a greater risk of early leakage in the company.

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.With two-stage liquid ring compressors, one is widespread Construction with a diagonal connecting pipe provided with which a part of the gas to be compressed and the Operating fluid outside of the pressure port of the first Stage is directed towards the suction opening of the second stage (DE-PS 870 004). Since this connecting pipe on both sides on the housing socket there are two additional sealing surfaces available. The disadvantages of these classic designs are the large number of individual parts with accordingly high manufacturing costs for processing the many Surfaces and the many areas 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 Stömungskanäle im mittleren Gehäuseteil unterzubringen (DE 197 58 340 A1). Der Nachteil dieser Ausführungsform ist, daß sie nur für einstufige Flüssigkeitsringgaspumpen anwendbar ist.Various approaches to pump parts are already known simplify or merge several pump components and so to reduce the number of parts of the liquid ring gas pumps. For example, it is known to have a control disk with the central body as one component (drawing of Travaini pumps TRHC 40-60). It is also a single stage liquid ring compressor known in which the division of the suction-side gas flows and the merging of the pressure-side gas streams is not takes place outside the compressor through so-called downpipes, but the gas flow is only connected in one side of the housing is and the division on the other side of the housing by straight pipes (EP 0 584 106 B1). It is also known to all axial flow channels in the middle Housing part to accommodate (DE 197 58 340 A1). The disadvantage this embodiment is that it is only for single stage liquid ring gas pumps is applicable.

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 create a Liquid ring gas pump of the type mentioned, in which the number of individual parts and in particular the number of Sealing surfaces to the outside is greatly reduced.

Die erfindungsgemäße Lösung besteht darin, daß das erste Gehäuseteil einstückig ausgebildet ist, mindestens ein vom zweiten zum dritten Gehäuseteil führender Verbindungskanal vorgesehen ist und daß die zum jeweils benachbarten Gehäuseteil gerichteten Öffnungen so ausgebildet sind, daß die zweiten und dritten Gehäuseteile identisch gleich ausbildbar sind.The solution according to the invention is that the first housing part is integrally formed, at least one of second connecting channel leading to the third housing part is provided and that to the adjacent housing part directed openings are designed so that the second and third housing parts can be configured identically are.

Die Erfindung ist anwendbar für ein- und zweistufige Flüssigkeitsringgaspumpen. Wenn die Flüssigkeitsringgaspumpe zweistufig ausgebildet ist, weist vorteilhafterweise der erste Gehäuseteil Einrichtungen zum Aufnehmen von inneren Steuerscheiben zwischen der beiden Stufen auf, die insbesondere eine Zwischenwand mit mindestens einem Kanal zum Durchleiten des geförderten Gases sein können.The invention is applicable for single and two-stage liquid ring gas pumps. If the liquid ring gas pump has two stages is advantageously formed, the first Housing part devices for receiving inner control disks between the two levels, in particular one Partition wall with at least one channel for passage of the extracted gas.

Bei einer vorteilhaften Ausführungsform weist die erfindungsgemäße Flüssigkeitsringgaspumpe nur zwei nach außen abzudichtende Verbindungsstellen auf, nämlich insbesondere die Verbindungsstellen benachbarter Gehäuseteile.In an advantageous embodiment, the invention Liquid ring gas pump only two to be sealed to the outside Connection points, namely in particular the connection points adjacent housing parts.

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 connections for emptying and / or dirt emptying, Cavitation protection and ventilation on the suction side.

Die Gehäuseteile können bei einer vorteilhaften Ausführungsform als Gußkonstruktion ausgebildet sein. Bei einer anderen vorteilhaften Ausführungsform sind die Gehäuseteile als Schweißkonstruktion ausgebildet.In an advantageous embodiment, the housing parts can be designed as a cast construction. Another one advantageous embodiment are the housing parts as Welded construction trained.

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 Fastening elements for axial bracing with the second and third housing parts.

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

  • den klassischen rohrartigen Mittelkörper, bei der zweistufigen Pumpe sogar zweifach,
  • das Verbindungsrohr der zweistufigen Flüssigkeitsringgaspumpe, das die Strömung von der ersten zur zweiten Stufe leitet,
  • Hosenrohre der einstufigen Pumpe, die die Gasströme an den axialen Ein- und Auslässen saugseitig aufteilen und druckseitig wieder zusammenführen,
  • bei der zweistufigen Flüssigkeitsringgaspumpe 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 (bei einer zweistufigen Pumpe) auf jetzt nur noch zwei Dichtflächen reduziert. Bei der einstufigen Flüssigkeitsringgaspumpe waren in der herkömmlichen Konstruktion acht Dichtflächen, davon vier axial zwischen den Steuerscheiben, dem Mittelkörper und den äußeren Gehäusen sowie vier an den Verbindungen von den Gehäusen zu den Hosenrohren erforderlich. Bei der herkömmlichen zweistufigen Pumpe gab es sieben Dichtflächen zwischen den Steuerscheiben, Mittelkörpern und äußeren Gehäusen sowie zwei zwischen den Gehäusen und dem Verbindungsrohr.
In a single component, namely the first housing part according to the invention, the liquid ring gas pump according to the invention contains the following previous components and functions:
  • the classic tubular middle body, with the two-stage pump even double,
  • the connecting pipe of the two-stage liquid ring gas pump, which directs the flow from the first to the second stage,
  • Downpipes of the single-stage pump, which divide the gas flows at the axial inlets and outlets on the suction side and bring them together again on the pressure side,
  • in the two-stage liquid ring gas pump, the mounting of the central control disks, which are now particularly easy to design as flat disks,
  • the outer control discs can be clamped between the first housing and the second or third housing in such a way that a double outer seal is not required;
  • the total number of sealing surfaces is reduced from a maximum of nine (for a two-stage pump) to just two sealing surfaces. In the conventional design, the single-stage liquid ring gas pump required eight sealing surfaces, four of them axially between the control discs, the center body and the outer housings and four at the connections from the housings to the downpipes. In the conventional two-stage pump, there were seven sealing surfaces between the control disks, middle 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 gleich ausgebildet sein können, was ebenfalls die Herstellungskosten und die Lagerhaltungskosten für Ersatzteile verringert.The construction according to the invention is characterized by a small number of components and few sealing surfaces to the outside. This creates significant advantages in manufacturing and Assembly process and the operational safety of the new Liquid ring gas pump. There is a particular advantage also that the second and third housing parts are identical can be of the same design, which is also the manufacturing cost and reduces the cost of storing 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
Figur 3
im Querschnitt eine zweite Ausführungsform einer erfindungsgemäßen Flüssigkeitsringgaspumpe
The invention is described below using advantageous embodiments with reference to the accompanying drawings, for example. Show it:
Figure 1
in cross section a conventional liquid ring gas pump;
Figure 2
in cross section a first embodiment of a liquid ring gas pump according to the invention; and
Figure 3
in cross section a second embodiment of a liquid ring gas pump according to the invention

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.In Figure 1 is a conventional liquid ring gas pump in cross section shown. In workrooms A are eccentric on a shaft B impellers C. The work rooms A are partially with a liquid, in particular Water filled so that the cells are between the wings enlarge the impellers due to the liquid ring and reduce, thereby achieving the pumping effect. There are control disks on the end faces of the impellers C. D, four in the embodiment of FIG. 1 such control disks. Housing parts E limit the work spaces in the radial direction to the outside. At both ends there are still housing parts F that have the required channels or chambers for the supply and discharge of the gas to be pumped exhibit. As can be clearly seen in Figure 1, are in axial In the direction of very many components assembled in succession, with a seal at the connection points must be provided 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 Gehäusteils 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. 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.The two-stage pump according to the invention, shown in Figure 2 is also has two impellers 1, which a shaft 11 attached and in the eccentric workrooms 16 rotate. On the outer faces of the impellers 1 there are control disks 2; in the middle between the impellers 1 are control discs 3, the Control discs are provided with suitable openings through the gas to be pumped enters the working spaces 16 or exit. In Figure 2, a connecting channel 13 is shown, the the suction opening 14 of the left (second) stage with the pressure opening 15 of the right (first) stage connects with what Partial flow of the conveying gas from the right (first) stage in the left (second) stage is headed. The other one Opening of the middle control discs 3 is through the middle Wall 8 covered and therefore inoperative. This middle wall 8 is part of a first housing part 5, which the working spaces 16 surrounds. This first housing part 5 has another Connection channel 7 for the gas flows within the pump. In the two-stage pump, a second partial flow is created of the conveying gas from the pressure opening 17 of the right (first) Stage led to the suction opening 18 of the left (second) stage. As can be seen, the outer wall 6, which is the working space 16 limited, the partition 8 and the connecting channel 7 in one piece educated. Other components are the left and to the right of the first housing part 1 arranged second and third housing parts 4, which can be identical. The only outside sealing surfaces are the sealing surfaces between the first housing and the second housing 4. These sealing surfaces are designated 9. At 19 are screws referred to, with which the housing parts 1, 4 to each other be attached.

Bei der einstufigen Pumpe der Figur 3 hat der Verbindungskanal 7 die Aufgabe, die druckseitigen auf beiden Seiten der Steuerscheiben 2 austretenden Gasströme zu vereinigen. Ein entsprechender parallel angeordneter Verbindungskanal für die Saugseite ist ebenfalls vorhanden, in Figur 3 jedoch nicht gezeigt. Auch hier gibt es nur zwei Abdichtungen 9, nämlich zwischen dem ersten Gehäuseteil 5 und dem zweiten bzw. dritten Gehäuseteil 4. In den Figuren 2 und 3 sind noch der Anschluß 10 für die Entleerung bzw. Schmutzentleerung, der Anschluß 11 für den Kavitationsschutz und der Anschluß 12 für saugseitige Belüftung gezeigt.In the single-stage pump of Figure 3, the connection channel 7 the task of printing on both sides of the Control discs to combine 2 emerging gas flows. On corresponding parallel connection channel for the Suction side is also present, but not in Figure 3 shown. Here too there are only two seals 9, namely between the first housing part 5 and the second or third Housing part 4. In Figures 2 and 3 are still the connection 10 for emptying or dirt emptying, the connection 11 for cavitation protection and the connection 12 for Ventilation on the suction side shown.

Claims (9)

Flüssigkeitsringgaspumpe mit einem ersten Gehäuseteil (5), das einen bzw. zwei Arbeitsräume (16) radial umschließt, in dem jeweils ein exzentrisch drehbar gelagertes Flügelrad (1) angeordnet ist, mit zweiten und dritten Gehäuseteilen (4), die den ersten Gehäuseteil (5) und die Pumpe beidseitig abschließen und Kanäle oder Kammern für die Zu- und Abführung des geförderten Gases aufweisen, und mit den die Arbeitsräume (16) in Axialrichtung begrenzenden Steuerscheiben (2, 3), dadurch gekennzeichnet, daß das erste Gehäuseteil (5) einstückig ausgebildet ist, mindestens ein vom zweiten zum dritten Gehäuseteil führender Verbindungskanal (7) vorgesehen ist und daß die zum jeweils benachbarten Gehäuseteil gerichteten Öffnungen so ausgebildet sind, daß die zweiten und dritten Gehäuseteile (4) identisch gleich ausbildbar sind.Liquid ring gas pump with a first housing part (5), which radially encloses one or two working spaces (16), in each of which an eccentrically rotatably mounted impeller (1) is arranged, with second and third housing parts (4), which the first housing part (5 ) and close the pump on both sides and have channels or chambers for the supply and discharge of the conveyed gas, and with the control discs (2, 3) delimiting the working spaces (16) in the axial direction, characterized in that the first housing part (5) is in one piece is formed, at least one connecting channel (7) leading from the second to the third housing part is provided and that the openings directed towards the respectively adjacent housing part are designed in such a way that the second and third housing parts (4) can be of identical design. Flüssigkeitsringgaspumpe nach Anspruch 1, dadurch gekennzeichnet, daß sie zweistufig ausgebildet ist und daß der erste Gehäuseteil (5) Einrichtungen (8) zum Aufnehmen von inneren Steuerscheiben (3) zwischen den beiden Stufen aufweist.Liquid ring gas pump according to claim 1, characterized in that it is constructed in two stages and in that the first housing part (5) has devices (8) for receiving inner control disks (3) between the two stages. Flüssigkeitsringgaspumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Einrichtungen zum Halten von inneren Steuerscheiben eine Zwischenwand (8) mit mindestens einem Kanal (13) zum Durchleiten des geförderten Gases aufweisen. Liquid ring gas pump according to Claim 2, characterized in that the devices for holding inner control disks have an intermediate wall (8) with at least one channel (13) for passing the conveyed gas through. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie nur zwei nach außen abzudichtende Verbindungsstellen (9) aufweist.Liquid ring gas pump according to one of claims 1 to 3, characterized in that it has only two connection points (9) to be sealed off from the outside. Flüssigkeitsringgaspumpe nach Anspruch 4, dadurch gekennzeichnet, daß die Verbindungsstellen die Verbindungsstellen benachbarter Gehäuseteile (4, 5) sind.Liquid ring gas pump according to claim 4, characterized in that the connection points are the connection points of adjacent housing parts (4, 5). Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der erste Gehäuseteil (5) Anschlüsse für Entleerung und/oder Schmutzentleerung (10), den Kavitationsschutz (11) sowie die saugseitige Belüftung (12) aufweist.Liquid ring gas pump according to one of claims 1 to 5, characterized in that the first housing part (5) has connections for emptying and / or dirt emptying (10), the cavitation protection (11) and the suction-side ventilation (12). Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Gehäuseteile (4, 5) als Gußkonstruktion ausgebildet sind.Liquid ring gas pump according to one of claims 1 to 6, characterized in that the housing parts (4, 5) are designed as a cast construction. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Gehäuseteile (4, 5) als Schweißkonstruktion ausgebildet sind.Liquid ring gas pump according to one of claims 1 to 6, characterized in that the housing parts (4, 5) are designed as welded structures. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der erste Gehäuseteil (5) Befestigungselemente (19) zur axialen Verspannung mit den zweiten und dritten Gehäuseteilen (4) aufweist.Liquid ring gas pump according to one of claims 1 to 8, characterized in that the first housing part (5) has fastening elements (19) for axial bracing 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
EP03011218A EP1477681B1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump
PT03011218T PT1477681E (en) 2003-05-16 2003-05-16 Liquid ring gas pump
DK03011218T DK1477681T3 (en) 2003-05-16 2003-05-16 Liquid ring pump
AT03011218T ATE337489T1 (en) 2003-05-16 2003-05-16 LIQUID RING GAS PUMP
ES03011218T ES2271420T3 (en) 2003-05-16 2003-05-16 HYDRORROTATIVE GAS PUMP.
DE50304745T DE50304745D1 (en) 2003-05-16 2003-05-16 Liquid ring gas pump
TW093112243A TWI273173B (en) 2003-05-16 2004-04-30 Liquid ring gas pump
US10/557,304 US7563075B2 (en) 2003-05-16 2004-05-04 Liquid ring pump
JP2006529736A JP2006529015A (en) 2003-05-16 2004-05-04 Liquid ring pump
CA 2525480 CA2525480C (en) 2003-05-16 2004-05-04 Liquid ring pump
HK06111848.5A HK1091251B (en) 2003-05-16 2004-05-04 Liquid ring pump
PCT/EP2004/004743 WO2004102003A1 (en) 2003-05-16 2004-05-04 Liquid ring pump
CNB2004800134706A CN100482946C (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

Applications Claiming Priority (1)

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

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

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US (1) US7563075B2 (en)
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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)
MY (1) MY136591A (en)
NO (1) NO20055277L (en)
PT (1) PT1477681E (en)
TW (1) TWI273173B (en)
WO (1) WO2004102003A1 (en)

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GB2507089A (en) 2012-10-18 2014-04-23 Ccl Group Ltd An anchor having expanded sections in multi wired tendons
WO2016035047A1 (en) * 2014-09-04 2016-03-10 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

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DE2714475A1 (en) * 1976-04-07 1977-10-20 Gen Signal Corp LIQUID RING PUMP
JPS61167196A (en) * 1985-08-21 1986-07-28 Nakamura Suikan:Kk One step operation side air port type water ring pump
JPH05118285A (en) * 1991-07-18 1993-05-14 Ebara Corp Liquid seal pump
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Also Published As

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CA2525480A1 (en) 2004-11-25
EP1477681B1 (en) 2006-08-23
TW200506214A (en) 2005-02-16
NO20055277D0 (en) 2005-11-09
ES2271420T3 (en) 2007-04-16
TWI273173B (en) 2007-02-11
MY136591A (en) 2008-10-31
ATE337489T1 (en) 2006-09-15
JP2006529015A (en) 2006-12-28
PT1477681E (en) 2006-12-29
US7563075B2 (en) 2009-07-21
DE50304745D1 (en) 2006-10-05
HK1091251A1 (en) 2007-01-12
NO20055277L (en) 2005-12-02
US20070065298A1 (en) 2007-03-22
CN100482946C (en) 2009-04-29
CN1791752A (en) 2006-06-21
WO2004102003A1 (en) 2004-11-25
CA2525480C (en) 2008-08-05
DK1477681T3 (en) 2007-01-02

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