EP1518055A1 - Liquid ring pump - Google Patents

Liquid ring pump

Info

Publication number
EP1518055A1
EP1518055A1 EP03740369A EP03740369A EP1518055A1 EP 1518055 A1 EP1518055 A1 EP 1518055A1 EP 03740369 A EP03740369 A EP 03740369A EP 03740369 A EP03740369 A EP 03740369A EP 1518055 A1 EP1518055 A1 EP 1518055A1
Authority
EP
European Patent Office
Prior art keywords
liquid ring
impeller
pump
ring pump
pressure
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
EP03740369A
Other languages
German (de)
French (fr)
Other versions
EP1518055B1 (en
Inventor
Pierre Hähre
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.)
Speck Pumpen Walter Speck & Co KG GmbH
Original Assignee
Speck Pumpen Walter Speck & Co KG 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 Speck Pumpen Walter Speck & Co KG GmbH filed Critical Speck Pumpen Walter Speck & Co KG GmbH
Publication of EP1518055A1 publication Critical patent/EP1518055A1/en
Application granted granted Critical
Publication of EP1518055B1 publication Critical patent/EP1518055B1/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
    • F04C19/008—Port members in the form of conical or cylindrical pieces situated in the centre of the impeller
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/603—Centering; Aligning
    • 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 present invention relates to a liquid ring pump.
  • Such liquid ring pumps or compressors have been known for a long time and are used in a wide variety of process engineering processes. Examples include use in plants for the manufacture of plastics or pharmaceuticals, for filling beverages and for paper production.
  • Liquid ring pumps or compressors work according to the displacement principle, whereby - in the most widespread design - a motor-driven impeller with blades is arranged eccentrically in a pump housing which has an interior with an essentially circular cross section.
  • an operating fluid for example water
  • Adjacent blades of the impeller define chambers with the liquid ring and the hub of the impeller which, due to the eccentric bearing of the impeller, have a volume which is dependent on the angular position of the chamber, the liquid ring penetrating more or less deeply into the chamber and thereby acting like a displacement piston.
  • control means are provided in which openings, so-called suction and
  • Pressure openings are recessed, through which the chambers communicate with the inlet and outlet of the pump.
  • the suction opening is located in the angular range in which the chamber volume is increased, while the pressure opening is arranged in the angular range with a decreasing chamber volume.
  • Liquid ring pumps are particularly suitable for pumping gases and vapors. To a certain extent, however, liquid flows can also be conveyed. Due to the design, when operating a liquid ring pump, a certain proportion of the operating liquid coming from the liquid ring is always conveyed.
  • the operating fluid of the pump has three functions. On the one hand, as explained above, it acts as a piston of the displacement pump. Also seals the individual chambers of the impeller against each other so that oil-free delivery of the fluid to be pumped is possible. The constant conveyance of part of the operating fluid also allows the heat of compression that occurs during operation to be removed. Operating fluid must therefore be supplied continuously so that the liquid ring is kept at a constant level.
  • liquid ring pump is extremely low-wear, has a high level of operational reliability and generates very little self-noise.
  • Liquid ring pumps can be divided into two groups according to the type of exposure to the fluid to be pumped. So-called axially loaded pumps are the most widespread. The impeller is limited in the axial direction by control disks arranged in a rotationally fixed manner in the pump chamber, in which the suction and pressure openings are left out. The direction of flow of the fluid entering and leaving the impeller is axial, ie parallel to the axis of the pump shaft on which the impeller is seated. Examples of such axially loaded liquid ring pumps, for example pumps in a bearing support design, in a block design or in the form of a block pump attached to a bearing support, are described in the German utility model DE 298 09 258.1 U of the applicant.
  • Axially loaded liquid ring pumps have found widespread use, in particular because of their comparatively simple construction compared to radially loaded pumps and the simpler and less expensive production.
  • a control disk is easier to manufacture than the control hub of a radially loaded pump.
  • the impeller of a radially loaded pump also requires a greater manufacturing effort, since openings must be left in the hub of the impeller for each chamber defined by the impeller blades, through which openings the fluid to be pumped can flow in or out.
  • the applicant's German utility model DE 200 15 709 U1 describes an improved radially loaded liquid ring pump with a control hub.
  • the pressure openings of the control hub of the known pump are at least partially provided with valves, so that pressure-dependent covering or unblocking of pressure openings is made possible.
  • Conventional liquid ring pumps, both radially and axially loaded pumps are often flanged directly to a drive motor and essentially consist of a first drive-side housing part and a second front-side housing part, which are connected to one another via a tongue and groove arrangement and surround a working area , The two
  • Housing parts are usually fixed together by screw connections.
  • a paddle wheel driven by the motor is rotatably arranged in the work space.
  • control means are provided which define a pressure and a suction space in the interior of the pump. Due to the mode of operation of the liquid ring pump, the impeller is arranged eccentrically in the work area, so that usually the two housing parts, which can also be referred to as pressure or suction housings, are eccentrically deflected with respect to the axis of rotation of the impeller which defines the pump axis. The deflection usually takes place on a large diameter on the outer circumference of the pump, as is shown, for example, in FIGS. 1 and 2 in the above
  • the present invention is therefore based on the technical problem of an improved liquid ring pump, in particular an improved one
  • the subject of the present application is accordingly a liquid ring pump for conveying fluids, which have a first, drive-side housing part and a second end-side housing part, which are connected to one another via a tongue and groove arrangement and surround a work area, and at least one rotatably arranged in the work area, include impeller with blades.
  • the pump further comprises control means which define a suction and a pressure space inside the pump.
  • the liquid ring pump according to the invention is characterized in that the tongue and groove arrangement is formed centrally to the axis of rotation of the impeller.
  • the housing parts are advantageously compressed to a diameter which is smaller than the inside diameter of the working space housing and is preferably less than 90% of the inside diameter of the working space housing.
  • the central tongue and groove arrangement comprises at least one groove which is concentric with the axis of rotation of the impeller and is recessed in one of the two housing parts and at least one spring which is concentric with the axis of rotation of the impeller and is provided in the other housing part.
  • the tongue and groove are essentially complementary to one another and can optionally contain sealing material, such as sealing rings.
  • the two housing parts are fixed to one another by a plurality of screw connections arranged on the outer circumference of the housing.
  • the central deflection of the two housing parts is particularly suitable for radially loaded liquid ring pumps with a control hub, since the construction according to the invention enables precise adjustment of the impeller and control hub.
  • a particularly preferred embodiment of the invention accordingly relates to a liquid ring pump in which the control means comprise at least one control hub which is arranged in a rotationally fixed manner inside the pump and which has at least one suction opening and / or at least one pressure opening.
  • the pump preferably has both a suction opening and a pressure opening.
  • Centrally sprung housing parts can, however, also be realized in pumps in which the control hub has, for example, only one pressure opening and the suction opening is recessed in a conventional control disk oriented perpendicular to the axis of rotation of the impeller.
  • FIG. 1 Such a combined axially and radially loaded liquid ring pump is shown in FIG. 1 of the utility model DE 200 15 709 U1, however without the feature of the central deflection of the two housing parts proposed here.
  • the invention can also be implemented in conventional axially loaded liquid ring pumps in which suction and pressure openings are left out in one or two control disks.
  • valves can have valve flaps or valve bodies, as described again in detail in DE 200 15 709 U1, for example.
  • the liquid ring pump according to the invention is advantageously provided with a single closable emptying opening, via which both the pressure chamber and the suction chamber can be emptied.
  • the motor-side housing part encloses the pressure chamber and the emptying opening is arranged in the front-side housing part that surrounds the working chamber, it is advantageously provided that the lower region of the pressure chamber is geodetically essentially at the level of passages that are recessed in the impeller and which ensure that the pressure area of the work area can communicate with the pressure room.
  • any liquid that may still be present in the pressure chamber can then flow out through the passages into the lower region of the working chamber, in which the drainage opening is arranged.
  • a corresponding arrangement can of course also be provided if, for example, the suction chamber is located in the drive-side housing part.
  • the pump according to the invention can be implemented particularly advantageously in the variants described in the utility model DE 200 15 709 U1, ie the pump can also have, for example, a downstream separator with a heat exchanger which may be connected.
  • FIG. 1 shows a schematic cross section through a liquid ring pump of the prior art, in which the two housing parts are eccentrically compressed;
  • Figure 2 shows a section through a preferred embodiment of the liquid ring pump according to the invention with a central deflection
  • a liquid ring pump 10 according to the prior art can be seen, which is designed as a block pump.
  • the pump 10 has a first housing part 11 on the drive side and a second housing part 12 on the front side.
  • the front housing part 12 is designed as a pot-like housing cover, which has a suction nozzle 14 on the longitudinal axis 13 of the pump, via which the fluid to be delivered is sucked in.
  • the two housing parts 11, 12 define a working space 15 in which an impeller 16 is rotatably mounted.
  • the housing part 11, which has a pressure port 17, is on a (only partially shown)
  • a control hub 22 is provided as the control means, which has at least one pressure opening 23 and at least one suction opening 24.
  • the fluid to be conveyed is sucked through the axially arranged suction nozzle 14 into the suction chamber 25, through an axial inlet opening 26 into the control hub 22 and flows through finally, in the radial direction, the suction opening 24 of the control hub in order to reach the chambers formed between the blades 27 of the impeller 16 in the working space 15.
  • the known pump has an emptying opening 36, 37 for the work space 15 and the pressure space 29, respectively.
  • FIG. 2 shows a preferred embodiment of the liquid ring pump according to the invention.
  • Components of the pump of FIG. 2 that correspond to components of the pump of FIG. 1 or that perform a comparable function are identified by the same reference numerals and are not explained in more detail below.
  • the variant shown in FIG. 2 does not show the drive motor (reference number 18 in FIG. 1) and the drive shaft engaging in the impeller hub (reference number 19 in FIG. 1).
  • the two housing parts 11, 12 are deflected concentrically to the axis of rotation of the impeller on a circumferential ring 38.
  • the first housing part 11 is formed with a spring 39 which is concentric with the longitudinal axis 13 of the pump and which corresponds to the axis of rotation of the impeller 16 and which fits into a corresponding one in the second Housing part 12 recessed, concentric groove 40 engages.
  • This ensures a precise assembly of the housing parts and in particular a precise adaptation of the non-rotatable control hub 22 and the rotatable impeller 16 encompassing the control hub.
  • the diameter of the deflection ring is significantly smaller than the inside diameter of the work space housing 15.
  • the bottom region 41 of the pressure chamber 29 ends geodetically higher in the pump according to the invention than in the known pump of FIG. 1, namely approximately at the level of the passages 31 in the impeller 16.
  • any liquid present in the pressure chamber can flow into the working chamber 15 via one or more of the passages 31 and be drained via the opening 42, which can be closed, for example, by a sealing screw. There is therefore no need for a separate outlet opening for the pressure chamber, which further reduces the manufacturing costs.

Abstract

The invention relates to a liquid ring pump (10) for transporting liquids. Said pump comprises a first housing element (11) on the drive side and a second housing element (12) on the front side, said housing elements being interconnected by means of a tongue and groove arrangement (38) and surrounding a working chamber (15). At least one impeller (16) provided with blades (27) is rotatably arranged in the working chamber (15). Said pump also comprises control means (22) which define a suction chamber and a pressure chamber (25,29) inside the pump. The inventive liquid ring pump is characterised in that the tongue and groove arrangement (38) is centrally embodied in relation to the rotational axis (13) of the impeller (16). The central engagement of the two housing elements significantly reduces the production and assembly costs as two excenters do not need to be fitted together.

Description

Flüssigkeits ringpumpe Liquid ring pump
Die vorliegende Erfindung betrifft eine Flüssigkeitsringpumpe. Derartige Flüssigkeitsringpumpen oder -kompressoren sind seit langem bekannt und werden in den verschiedensten verfahrenstechnischen Prozessen eingesetzt. Beispielhaft seien hier der Einsatz in Anlagen zur Kunststoff- oder Arzneimittelherstellung, zur Getränkeabfüllung und zur Papierherstellung genannt.The present invention relates to a liquid ring pump. Such liquid ring pumps or compressors have been known for a long time and are used in a wide variety of process engineering processes. Examples include use in plants for the manufacture of plastics or pharmaceuticals, for filling beverages and for paper production.
Flüssigkeitsringpumpen oder -kompressoren arbeiten nach dem Verdrängerprinzip, wobei - in der am weitesten verbreiteten Bauweise - ein motorbetriebenes, mit Schaufeln versehenes Laufrad exzentrisch in einem Pumpengehäuse angeordnet ist, das einen Innenraum mit im wesentlichen kreisförmigem Querschnitt aufweist. In dem Pumpengehäuse befindet sich eine Betriebsflüssigkeit, beispielsweise Wasser, die durch die Drehung des Laufrades in Rotation versetzt wird und einen Flüssigkeitsring ausbildet. Benachbarte Schaufeln des Laufrades definieren mit dem Flüssigkeitsring und der Nabe des Laufrades Kammern, die aufgrund der exzentrischen Lagerung des Laufrades ein von der Winkelposition der Kammer abhängiges Volumen besitzen, wobei der Flüssigkeitsring mehr oder weniger tief in die Kammer eindringt und dabei wie ein Verdrängerkolben wirkt. Außerdem sind Steuermittel vorgesehen, in denen Öffnungen, sogenannte Saug- undLiquid ring pumps or compressors work according to the displacement principle, whereby - in the most widespread design - a motor-driven impeller with blades is arranged eccentrically in a pump housing which has an interior with an essentially circular cross section. There is an operating fluid, for example water, in the pump housing, which is set in rotation by the rotation of the impeller and forms a fluid ring. Adjacent blades of the impeller define chambers with the liquid ring and the hub of the impeller which, due to the eccentric bearing of the impeller, have a volume which is dependent on the angular position of the chamber, the liquid ring penetrating more or less deeply into the chamber and thereby acting like a displacement piston. In addition, control means are provided in which openings, so-called suction and
Drucköffnungen, ausgespart sind, über welche die Kammern mit dem Ein- bzw. Ausgang der Pumpe kommunizieren. Dabei befindet sich die Saugöffnung in dem Winkelbereich, in welchem eine Vergrößerung des Kammervolumens stattfindet, während die Drucköffnung in dem Winkelbereich mit sich verringerndem Kammervolumen angeordnet ist. Flüssigkeitsringpumpen sind insbesondere zur Förderung von Gasen und Dämpfen geeignet. Jedoch können in gewissem Umfang auch Flüssigkeitsströme mitgefördert werden. Konstruktionsbedingt wird beim Betrieb einer Flüssigkeitsringpumpe stets ein gewisser Anteil an aus dem Flüssigkeitsring stammender Betriebsflüssigkeit mitgefördert.Pressure openings are recessed, through which the chambers communicate with the inlet and outlet of the pump. The suction opening is located in the angular range in which the chamber volume is increased, while the pressure opening is arranged in the angular range with a decreasing chamber volume. Liquid ring pumps are particularly suitable for pumping gases and vapors. To a certain extent, however, liquid flows can also be conveyed. Due to the design, when operating a liquid ring pump, a certain proportion of the operating liquid coming from the liquid ring is always conveyed.
Die Betriebsflüssigkeit der Pumpe hat im wesentlichen drei Funktionen. Zum einen wirkt sie, wie oben erläutert, als Kolben der Verdrängungspumpe. Außerdem dichtet sie die einzelnen Kammern des Laufrades gegeneinander ab, so daß eine ölfreie Förderung des zu fördernden Fluides möglich ist. Die stetige Mitförderung eines Teils der Betriebsflüssigkeit erlaubt es außerdem, die im Betrieb auftretende Verdichtungswärme abzuführen. Es muß daher fortlaufend Betriebsflüssigkeit zugeführt werden, damit der Flüssigkeitsring auf konstantem Niveau gehalten wird.The operating fluid of the pump has three functions. On the one hand, as explained above, it acts as a piston of the displacement pump. Also seals the individual chambers of the impeller against each other so that oil-free delivery of the fluid to be pumped is possible. The constant conveyance of part of the operating fluid also allows the heat of compression that occurs during operation to be removed. Operating fluid must therefore be supplied continuously so that the liquid ring is kept at a constant level.
Durch diesen prinzipiellen Aufbau ist die Flüssigkeitsringpumpe äußert verschleißarm, weist eine hohe Betriebssicherheit auf und erzeugt nur sehr geringe Eigengeräusche.This basic design means that the liquid ring pump is extremely low-wear, has a high level of operational reliability and generates very little self-noise.
Man kann Flüssigkeitsringpumpen nach Art der Beaufschlagung mit dem zu fördernden Fluid in zwei Gruppen unterteilen. Am weitesten verbreitet sind sogenannte axial beaufschlagte Pumpen. Dabei wird das Laufrad in axialer Richtung durch drehfest im Pumpenraum angeordnete Steuerscheiben begrenzt, in welchen die Saug- und Drucköffnungen ausgespart sind. Die Strömungsrichtung des in das Laufrad eintretenden und das Laufrad verlassenden Fluids ist axial, d.h. parallel zur Achse der Pumpenwelle, auf der das Laufrad sitzt. Beispiele solcher axial beaufschlagter Flüssigkeitsringpumpen, beispielsweise Pumpen in Lagerträgerbauweise, in Blockbauweise oder in Form einer an einem Lagerträger befestigten Blockpumpe, sind in dem deutschen Gebrauchsmuster DE 298 09 258.1 U der Anmelderin beschrieben. Daneben gibt es sogenannte radial beaufschlagte Pumpen, die Steuernaben aufweisen, in denen die Druck- und Saugöffnungen ausgespart sind. Das Ein- und Ausströmen des zu fördernden Fluids in und aus den Kammern des Laufrades erfolgt bei derartigen Pumpen radial durch die Steuernabe. Das Laufrad ist üblicherweise seitlich durch Deckscheiben geschlossen und gleitet mit möglichst geringem Spiel über die herkömmlicherweise drehfest am Gehäusedeckel der Pumpe angeschraubte, angegossene oder angeschweißte Steuernabe. Die Steuernabe weist außerdem meist axial orientierte Ein- bzw. Austrittsöffnung für das zu fördernde Fluid auf, die mit dem Ein- bzw. Ausgang der Pumpe kommunizieren. Die Steuernabe kann eine im wesentlichen zylindrische Allgemeinform besitzen, wie dies beispielsweise bei den in den Patenten US 3,894,812 und US 5,803,713 beschriebenen Flüssigkeitsringpumpen der Fall ist. Beispielsweise aus dem US-Patent 3,712,764 sind auch Pumpen mit konischen Steuernaben bekannt.Liquid ring pumps can be divided into two groups according to the type of exposure to the fluid to be pumped. So-called axially loaded pumps are the most widespread. The impeller is limited in the axial direction by control disks arranged in a rotationally fixed manner in the pump chamber, in which the suction and pressure openings are left out. The direction of flow of the fluid entering and leaving the impeller is axial, ie parallel to the axis of the pump shaft on which the impeller is seated. Examples of such axially loaded liquid ring pumps, for example pumps in a bearing support design, in a block design or in the form of a block pump attached to a bearing support, are described in the German utility model DE 298 09 258.1 U of the applicant. There are also so-called radially loaded pumps that have control hubs in which the pressure and suction openings are left out. In such pumps, the inflow and outflow of the fluid to be delivered into and out of the chambers of the impeller take place radially through the control hub. The impeller is usually closed laterally by cover disks and slides with as little play as possible over the control hub, which is conventionally screwed, cast or welded onto the housing cover of the pump. The control hub also mostly has axially oriented inlet and outlet openings for the fluid to be pumped, which communicate with the inlet and outlet of the pump. The control hub can have an essentially cylindrical general shape, as is the case, for example, with the liquid ring pumps described in the patents US Pat. No. 3,894,812 and US Pat. No. 5,803,713. For example, pumps with conical control hubs are known from US Pat. No. 3,712,764.
Axial beaufschlagte Flüssigkeitsringpumpen haben insbesondere aufgrund ihres gegenüber radial beaufschlagten Pumpen vergleichsweise einfachen Aufbaus und der einfacheren und kostengünstigeren Herstellung weite Verbreitung gefunden. So ist im Normalfall eine Steuerscheibe einfacher herstellbar als die Steuernabe einer radial beaufschlagten Pumpe. Auch das Laufrad einer radial beaufschlagten Pumpe erfordert einen größeren Herstellungsaufwand, da in der Nabe des Laufrades für jede durch die Laufradschaufeln definierte Kammer Öffnungen ausgespart werden müssen, durch die das zu fördernde Fluid ein- bzw. ausströmen kann.Axially loaded liquid ring pumps have found widespread use, in particular because of their comparatively simple construction compared to radially loaded pumps and the simpler and less expensive production. In the normal case, a control disk is easier to manufacture than the control hub of a radially loaded pump. The impeller of a radially loaded pump also requires a greater manufacturing effort, since openings must be left in the hub of the impeller for each chamber defined by the impeller blades, through which openings the fluid to be pumped can flow in or out.
Diesen Nachteilen von radial beaufschlagten Flüssigkeitsringpumpen stehen aber spezifische Vorteile gegenüber. So sind die Strömungsgeschwindigkeiten an den Druck- bzw. Saugöffnungen bei radial beaufschlagten Pumpen im allgemeinen geringer als bei axial beaufschlagten Pumpen, so daß auch entsprechend geringere Drosselverluste auftreten. Darüber hinaus erfolgt das Ein- und Ausströmen des zu fördernden Fluides in und aus den Kammern des Laufrades in einer gleichmäßiger verteilten Form als bei axial beaufschlagten Pumpen. Ein besonderer Vorteil der radial beaufschlagten Pumpen ist aber in deren Fähigkeit zu sehen, große Flüssigkeitsmengen mitfördern zu können. Bestimmte Varianten von radial beaufschlagten Pumpen können sogar ohne Gefahr einer Beschädigung in geflutetem Zustand angefahren werden.However, these disadvantages of radially loaded liquid ring pumps are offset by specific advantages. The flow velocities at the pressure or suction openings are generally lower in the case of radially loaded pumps than in the case of axially loaded pumps, so that correspondingly lower throttling losses also occur. In addition, the fluid to be pumped flows in and out of the chambers of the impeller in a more uniformly distributed form than in the case of axially loaded pumps. A particular advantage of the radially loaded pumps is their ability to be able to convey large amounts of liquid. Certain variants of radially loaded pumps can even be started in the flooded state without risk of damage.
In dem deutschen Gebrauchsmuster DE 200 15 709 U1 der Anmelderin wird eine verbesserte radial beaufschlagte Flüssigkeitsringpumpe mit Steuernabe beschrieben. Zur Verringerung von Drosselverlusten und um die Pumpe bei unterschiedlichsten Druckverhältnissen mit einem hohen Wirkungsgrad betreiben zu können, sind die Drucköffnungen der Steuernabe der bekannten Pumpe zumindest teilweise mit Ventilen versehen, so dass ein druckabhängiges Abdecken bzw. Freigeben von Drucköffnungen ermöglicht wird. Übliche Flüssigkeitsringpumpen, und zwar sowohl radial als auch axial beaufschlagte Pumpen, werden häufig direkt an einen Antriebsmotor angeflanscht und bestehen im wesentlichen aus einem ersten antriebseitigen Gehäuseteil und einem zweiten stirnseitigen Gehäuseteil, die über eine Nut/Feder-Anordnung miteinander verbunden sind und einen Arbeitsraum umgeben. Die beidenThe applicant's German utility model DE 200 15 709 U1 describes an improved radially loaded liquid ring pump with a control hub. In order to reduce throttle losses and to operate the pump with a high degree of efficiency under the most varied pressure conditions, the pressure openings of the control hub of the known pump are at least partially provided with valves, so that pressure-dependent covering or unblocking of pressure openings is made possible. Conventional liquid ring pumps, both radially and axially loaded pumps, are often flanged directly to a drive motor and essentially consist of a first drive-side housing part and a second front-side housing part, which are connected to one another via a tongue and groove arrangement and surround a working area , The two
Gehäuseteile werden üblicherweise durch Schraubverbindungen miteinander fixiert. In dem Arbeitsraum ist ein vom Motor angetriebenes Schaufellaufrad drehbar angeordnet. Ferner sind Steuermittel vorgesehen, die im Inneren der Pumpe einen Druck- und einen Saugraum definieren. Auf Grund der Funktionsweise der Flüssigkeitsringpumpe ist das Laufrad exzentrisch im Arbeitsraum angeordnet, so dass üblicherweise auch die beiden Gehäuseteile, die man auch als Druck- bzw. Sauggehäuse bezeichnen kann, bezüglich der Drehachse des Laufrades welche die Pumpenachse definiert, exzentrisch eingefedert sind. Die Einfederung erfolgt dabei üblicherweise auf einem großen Durchmesser am Außenumfang der Pumpe, wie dies beispielsweise aus den Figuren 1 und 2 in dem oben genanntenHousing parts are usually fixed together by screw connections. A paddle wheel driven by the motor is rotatably arranged in the work space. Furthermore, control means are provided which define a pressure and a suction space in the interior of the pump. Due to the mode of operation of the liquid ring pump, the impeller is arranged eccentrically in the work area, so that usually the two housing parts, which can also be referred to as pressure or suction housings, are eccentrically deflected with respect to the axis of rotation of the impeller which defines the pump axis. The deflection usually takes place on a large diameter on the outer circumference of the pump, as is shown, for example, in FIGS. 1 and 2 in the above
Gebrauchsmusters DE 200 15 709 U1 hervorgeht. Eine derartige Konstruktion ist aber sowohl in der Herstellung als auch bei der Montage der Pumpe sehr aufwändig, da zwei Excenter präzise aneinander angepasst werden müssen. Diese Problematik macht sich insbesondere bei radial beaufschlagten Pumpen mit Nabensteuerung bemerkbar, da für den leichten Lauf des Laufrades eine exakte Anpassung der drehfesten Steuernabe und des die Steuernabe umgreifenden Laufrades erforderlich ist.Utility model DE 200 15 709 U1 emerges. However, such a construction is very complex both in the manufacture and in the assembly of the pump, since two eccentrics have to be precisely matched to one another. This problem is particularly noticeable in the case of radially loaded pumps with hub control, since an exact adjustment of the non-rotatable control hub and of the impeller encompassing the control hub is required for the smooth running of the impeller.
Der vorliegenden Erfindung liegt daher das technische Problem zu Grunde, eine verbesserte Flüssigkeitsringpumpe, insbesondere eine verbesserteThe present invention is therefore based on the technical problem of an improved liquid ring pump, in particular an improved one
Flüssigkeitsringpumpe mit Nabensteuerung bereit zu stellen, die eine einfachere und kostengünstigere Herstellung und Montage erlaubt.To provide liquid ring pump with hub control, which allows easier and cheaper manufacture and assembly.
Erfindungsgemäß wird dieses Problem durch die Bereitstellung der Flüssigkeitsringpumpe mit den in den beigefügten Ansprüchen beschriebenen Merkmalen gelöst. Gegenstand der vorliegenden Anmeldung ist demnach eine Flüssigkeitsringpumpe zum Fördern von Fluiden, die einen ersten, antriebsseitigen Gehäuseteil und einen zweiten stirnseitigen Gehäuseteil, die über eine Nut/Feder-Anordnung miteinander verbunden sind und einen Arbeitsraum umgeben, und wenigstens ein in dem Arbeitsraum drehbar angeordnete, mit Schaufeln versehenes Laufrad umfassen. Die Pumpe umfasst ferner Steuermittel, die im Inneren der Pumpe einen Saug- und einen Druckraum definieren. Die erfindungsgemäße Flüssigkeitsringpumpe ist dadurch gekennzeichnet, dass die Nut/Feder-Anordnung zentrisch zu der Drehachse des Laufrades ausgebildet ist. Durch die zentrische Einfederung der beiden Gehäuseteile verringert sich der Herstellungs- und Montageaufwand beträchtlich, da die Anpassung von zwei Excentem entfällt. Vorteilhaft werden die Gehäuseteile auf einem Durchmesser eingefedert, der kleiner als der Innendurchmesser des Arbeitsraumgehäuses ist und vorzugsweise weniger als 90 % des Innendurchmessers des Arbeitsraumgehäuses beträgt.According to the invention, this problem is solved by the provision of the liquid ring pump with the features described in the appended claims. The subject of the present application is accordingly a liquid ring pump for conveying fluids, which have a first, drive-side housing part and a second end-side housing part, which are connected to one another via a tongue and groove arrangement and surround a work area, and at least one rotatably arranged in the work area, include impeller with blades. The pump further comprises control means which define a suction and a pressure space inside the pump. The liquid ring pump according to the invention is characterized in that the tongue and groove arrangement is formed centrally to the axis of rotation of the impeller. Due to the central deflection of the two housing parts, the manufacturing and assembly work is reduced considerably, since the adjustment of two eccentrics is not necessary. The housing parts are advantageously compressed to a diameter which is smaller than the inside diameter of the working space housing and is preferably less than 90% of the inside diameter of the working space housing.
Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Flüssigkeitsringpumpe umfasst die zentrische Nut/Feder-Anordnung mindestens eine zur Drehachse des Laufrades konzentrische, in einem der beiden Gehäuseteile ausgesparte Nut und wenigstens eine, zur Drehachse des Laufrades konzentrische, in dem anderen Gehäuseteil vorgesehene Federn. Es versteht sich, dass Nut und Feder im wesentlichen komplementär zueinander ausgebildet sind und gegebenenfalls Dichtmaterial, wie beispielsweise Dichtringe enthalten können. Die beiden Gehäuseteile werden durch mehrere am Außenumfang des Gehäuses angeordnete Schraubverbindungen miteinander fixiert.According to a preferred embodiment of the liquid ring pump according to the invention, the central tongue and groove arrangement comprises at least one groove which is concentric with the axis of rotation of the impeller and is recessed in one of the two housing parts and at least one spring which is concentric with the axis of rotation of the impeller and is provided in the other housing part. It is understood that the tongue and groove are essentially complementary to one another and can optionally contain sealing material, such as sealing rings. The two housing parts are fixed to one another by a plurality of screw connections arranged on the outer circumference of the housing.
Die zentrische Einfederung der beiden Gehäuseteile eignet sich insbesondere für radial beaufschlagte Flüssigkeitsringpumpen mit Steuernabe, da mit der erfindungsgemäßen Konstruktion eine präzise Anpassung von Laufrad und Steuernabe möglich ist. Gegenstand einer besonders bevorzugten Ausführungsform der Erfindung ist demnach eine Flüssigkeitsringpumpe, bei der die Steuermittel zumindest eine im Inneren der Pumpe drehfest angeordnete Steuernabe umfassen, die mindestens eine Saugöffnung und/oder mindestens eine Drucköffnung aufweist. Bevorzugt weist die Pumpe sowohl eine Saugöffnung als auch eine Drucköffnung auf. Zentrisch eingefederte Gehäuseteile lassen sich jedoch auch bei Pumpen realisieren, bei denen die Steuemabe beispielsweise lediglich eine Drucköffnung aufweist und die Saugöffnung in einer herkömmlichen senkrecht zur Laufraddrehachse orientierten Steuerscheibe ausgespart ist. Eine derartige kombinierte axial und radial beaufschlagte Flüssigkeitsringpumpe ist - allerdings ohne das hier vorgeschlagene Merkmal der zentrischen Einfederung der beiden Gehäuseteile - in Figur 1 des Gebrauchsmusters DE 200 15 709 U1 dargestellt. Ebenso lässt sich die Erfindung bei herkömmlichen axial beaufschlagten Flüssigkeitsringpumpen realisieren, bei denen Saug- und Drucköffnungen in einer oder zwei Steuerscheibe ausgespart sind.The central deflection of the two housing parts is particularly suitable for radially loaded liquid ring pumps with a control hub, since the construction according to the invention enables precise adjustment of the impeller and control hub. A particularly preferred embodiment of the invention accordingly relates to a liquid ring pump in which the control means comprise at least one control hub which is arranged in a rotationally fixed manner inside the pump and which has at least one suction opening and / or at least one pressure opening. The pump preferably has both a suction opening and a pressure opening. Centrally sprung housing parts can, however, also be realized in pumps in which the control hub has, for example, only one pressure opening and the suction opening is recessed in a conventional control disk oriented perpendicular to the axis of rotation of the impeller. Such a combined axially and radially loaded liquid ring pump is shown in FIG. 1 of the utility model DE 200 15 709 U1, however without the feature of the central deflection of the two housing parts proposed here. The invention can also be implemented in conventional axially loaded liquid ring pumps in which suction and pressure openings are left out in one or two control disks.
Bei der radial beaufschlagten Ausführungsform der erfindungsgemäßen Flüssigkeitsringpumpe versieht man vorteilhaft die Drucköffnungen der Steuernabe zumindest teilweise mit Ventilen. Die Ventile können, wie beispielsweise wiederum in der DE 200 15 709 U1 detaillierter beschrieben ist, Ventilklappen oder Ventilkörper aufweisen.In the radially loaded embodiment of the liquid ring pump according to the invention, the pressure openings of the control hub are advantageously at least partially provided with valves. The valves can have valve flaps or valve bodies, as described again in detail in DE 200 15 709 U1, for example.
Vorteilhaft ist die erfindungsgemäße Flüssigkeitsringpumpe mit einer einzigen verschließbaren Entleerungsöffnung versehen, über die sowohl der Druckraum als auch der Saugraum entleert werden können. Wenn beispielsweise der motorseitige Gehäuseteil den Druckraum umschließt und die Entleerungsöffnung im stirnseitigen Gehäuseteil, der den Arbeitsraum umschließt, angeordnet ist, so ist vorteilhaft vorgesehen, dass der untere Bereich des Druckraums geodätisch im wesentlichen auf Höhe von Durchlässen liegt, die in dem Laufrad ausgespart sind und die gewährleisten, dass der Druckbereich des Arbeitsraums mit dem Druckraum kommunizieren kann. Beim Stillstand der Pumpe kann dann die gegebenenfalls im Druckraum noch vorhandene Flüssigkeit über die Durchlässe in den unteren Bereich des Arbeitsraum abfließen, in welchem die Entleerungsöffnung angeordnet ist. Eine entsprechende Anordnung kann man selbstverständlich auch dann vorsehen, wenn sich beispielsweise der Saugraum im antriebsseitigen Gehäuseteil befindet. Die erfindungsgemäße Pumpe lässt sich besonders vorteilhaft in den in dem Gebrauchmuster DE 200 15 709 U1 beschriebenen Varianten realisieren, das heißt die Pumpe kann beispielsweise auch einen nachgeschalteten Abscheider mit gegebenenfalls angeschlossenem Wärmetauscher aufweisen.The liquid ring pump according to the invention is advantageously provided with a single closable emptying opening, via which both the pressure chamber and the suction chamber can be emptied. If, for example, the motor-side housing part encloses the pressure chamber and the emptying opening is arranged in the front-side housing part that surrounds the working chamber, it is advantageously provided that the lower region of the pressure chamber is geodetically essentially at the level of passages that are recessed in the impeller and which ensure that the pressure area of the work area can communicate with the pressure room. When the pump is at a standstill, any liquid that may still be present in the pressure chamber can then flow out through the passages into the lower region of the working chamber, in which the drainage opening is arranged. A corresponding arrangement can of course also be provided if, for example, the suction chamber is located in the drive-side housing part. The pump according to the invention can be implemented particularly advantageously in the variants described in the utility model DE 200 15 709 U1, ie the pump can also have, for example, a downstream separator with a heat exchanger which may be connected.
Die vorliegende Erfindung wird im Folgenden anhand eines in den beigefügten Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The present invention is explained below with reference to an embodiment shown in the accompanying drawings.
In den Zeichnungen zeigt:In the drawings:
Figur 1 einen schematischen Querschnitt durch eine Flüssigkeitsringpumpe des Standes der Technik, bei der die beiden Gehäuseteile exzentrisch eingefedert sind; und1 shows a schematic cross section through a liquid ring pump of the prior art, in which the two housing parts are eccentrically compressed; and
Figur 2 einen Schnitt durch eine bevorzugte Ausführungsform der erfindungsgemäßen Flüssigkeitsringpumpe mit zentrisch einfedertenFigure 2 shows a section through a preferred embodiment of the liquid ring pump according to the invention with a central deflection
Gehäuseteilen.Housing parts.
Bezugnehmend auf Figur 1 erkennt man eine Flüssigkeitsringpumpe 10 gemäß Stand der Technik, die als Blockpumpe ausgebildet ist. Die Pumpe 10 weist ein erstes, antriebsseitiges Gehäuseteil 11 und ein zweites, stirnseitiges Gehäuseteil 12 auf. Das stirnseitige Gehäuseteil 12 ist als topfartiger Gehäusedeckel ausgebildet, der auf der Pumpenlängsachse 13 einen Saugstutzen 14 aufweist, über den das zu fördernde Fluid angesaugt wird. Die beiden Gehäuseteile 11 , 12 definieren einen Arbeitsraum 15, in welchem ein Laufrad 16 drehbar gelagert ist. Das Gehäuseteil 11 , das einen Druckstutzen 17 aufweist, ist an einem (nur teilweise dargestellten)Referring to FIG. 1, a liquid ring pump 10 according to the prior art can be seen, which is designed as a block pump. The pump 10 has a first housing part 11 on the drive side and a second housing part 12 on the front side. The front housing part 12 is designed as a pot-like housing cover, which has a suction nozzle 14 on the longitudinal axis 13 of the pump, via which the fluid to be delivered is sucked in. The two housing parts 11, 12 define a working space 15 in which an impeller 16 is rotatably mounted. The housing part 11, which has a pressure port 17, is on a (only partially shown)
Antriebsmotor 18 angeflanscht, dessen Antriebswelle 19 über eine Gleitringdichtung 20 dicht in die Pumpe geführt wird. Das Laufrad 16 ist über eine Laufradnabe 21 drehfest mit der Antriebswelle 19 verbunden. Als Steuermittel ist in der dargestellten Ausführungsform eine Steuemabe 22 vorgesehen, die wenigstens eine Drucköffnung 23 und wenigstens eine Saugöffnung 24 aufweist. Das zu fördernde Fluid wird über den axial angeordneten Saugstutzen 14 in den Saugraum 25, durch eine axiale Eintrittsöffnung 26 in die Steuemabe 22 gesaugt und durchströmt schließlich in radialer Richtung die Saugöffnung 24 der Steuemabe, um im Arbeitsraum 15 in die zwischen den Schaufeln 27 des Laufrades 16 gebildeten Kammern zu gelangen. Nach Kompression des Fluids in den Kammern aufgrund der exzentrischen Anordnung des Laufrades in dem durch die Betriebsflüssigkeit gebildeten Flüssigkeitsrings strömt das wiederum in radialer Richtung durch die von Klappenventilen 28 beaufschlagten Drucköffnungen 23 in den Druckraum 29 der Pumpe und gelangt nach entsprechender Umlenkung durch die im vorliegenden Fall ringförmig ausgebildete Austrittsöffnung 30 der Steuemabe 22 und durch entsprechende ringförmig angeordnete Durchlässe 31 im Laufrad 16 zu dem Druckstutzen 17. In der Steuemabe 22 sind der Saugraum 25 und der Druckraum 29 durch eine Trennwand 32 voneinander getrennt. Das Laufrad weist seitliche Deckscheiben 33, 34 auf, deren axialer Abstand sich bei Annäherung an die Steuemabe 22 verringert. Wie man bei der Pumpe des Standes der Technik gemäß Figur 1 erkennt, sind die beiden Gehäuseteile über eine exzentrische Nut/Feder- Anordnungen 35 miteinander verbunden, die am Außenumfang desFlanged drive motor 18, the drive shaft 19 is guided tightly into the pump via a mechanical seal 20. The impeller 16 is rotatably connected to the drive shaft 19 via an impeller hub 21. In the embodiment shown, a control hub 22 is provided as the control means, which has at least one pressure opening 23 and at least one suction opening 24. The fluid to be conveyed is sucked through the axially arranged suction nozzle 14 into the suction chamber 25, through an axial inlet opening 26 into the control hub 22 and flows through finally, in the radial direction, the suction opening 24 of the control hub in order to reach the chambers formed between the blades 27 of the impeller 16 in the working space 15. After compression of the fluid in the chambers due to the eccentric arrangement of the impeller in the liquid ring formed by the operating fluid, this in turn flows in the radial direction through the pressure openings 23 acted upon by flap valves 28 into the pressure chamber 29 of the pump and, after corresponding deflection, passes through the in the present case ring-shaped outlet opening 30 of the control hub 22 and through corresponding ring-shaped passages 31 in the impeller 16 to the pressure port 17. In the control hub 22, the suction chamber 25 and the pressure chamber 29 are separated from one another by a partition wall 32. The impeller has lateral cover disks 33, 34, the axial spacing of which decreases when the control hub 22 is approached. As can be seen in the pump of the prior art according to FIG. 1, the two housing parts are connected to one another via an eccentric tongue and groove arrangement 35, which are arranged on the outer circumference of the
Pumpengehäuses verläuft. Schließlich weist die Bekannte Pumpe jeweils eine Entleerungsöffnung 36, 37 für den Arbeitsraum 15 bzw. den Druckraum 29 auf.Pump housing runs. Finally, the known pump has an emptying opening 36, 37 for the work space 15 and the pressure space 29, respectively.
In Figur 2 ist nun eine bevorzugte Ausführungsform der erfindungsgemäßen Flüssigkeitsringpumpe dargestellt. Bauelemente der Pumpe der Figur 2, die Bauelementen der Pumpe der Figur 1 entsprechen oder die eine vergleichbare Funktion erfüllen sind mit denselben Bezugsziffern bezeichnet und werden im folgenden nicht mehr ausführlicher erläutert. Bei der in Figur 2 dargestellten Variante ist der Übersichtlichkeit halber der Antriebsmotor (Bezugsziffer 18 in Figur 1) und die in die Laufradnabe eingreifende Antriebswelle (Bezugsziffer 19 in Figur 1 ) nicht dargestellt.FIG. 2 shows a preferred embodiment of the liquid ring pump according to the invention. Components of the pump of FIG. 2 that correspond to components of the pump of FIG. 1 or that perform a comparable function are identified by the same reference numerals and are not explained in more detail below. For the sake of clarity, the variant shown in FIG. 2 does not show the drive motor (reference number 18 in FIG. 1) and the drive shaft engaging in the impeller hub (reference number 19 in FIG. 1).
Man erkennt, dass bei ansonsten weitgehend ähnlichem Aufbau, die beiden Gehäuseteile 11 , 12 auf einem umlaufenden Kranz 38 konzentrisch zur Drehachse des Laufrades eingefedert sind. Dazu ist dem ersten Gehäuseteil 11 eine zur Pumpenlängsachse 13, die der Drehachse des Laufrads 16 entspricht, konzentrische Feder 39 ausgebildet, die in eine entsprechende, in dem zweiten Gehäuseteil 12 ausgesparte, konzentrische Nut 40 eingreift. Damit ist ein präziser Zusammenbau der Gehäuseteile und insbesondere eine präzise Anpassung der drehfesten Steuemabe 22 und des die Steuernabe umgreifenden drehbaren Laufrades 16 gewährleistet. Der Durchmesser des Einfederungskranzes ist wesentlich kleiner als der Innendurchmesser des Arbeitsraumgehäuses 15.It can be seen that, with an otherwise largely similar structure, the two housing parts 11, 12 are deflected concentrically to the axis of rotation of the impeller on a circumferential ring 38. For this purpose, the first housing part 11 is formed with a spring 39 which is concentric with the longitudinal axis 13 of the pump and which corresponds to the axis of rotation of the impeller 16 and which fits into a corresponding one in the second Housing part 12 recessed, concentric groove 40 engages. This ensures a precise assembly of the housing parts and in particular a precise adaptation of the non-rotatable control hub 22 and the rotatable impeller 16 encompassing the control hub. The diameter of the deflection ring is significantly smaller than the inside diameter of the work space housing 15.
Man erkennt femer, dass der Bodenbereich 41 des Druckraum 29 bei der erfindungsgemäßen Pumpe geodätisch höher als bei der bekannten Pumpe der Figur 1 , nämlich etwa auf Höhe der Durchlässe 31 im Laufrad 16 endet. Bei Stillstand der Pumpe kann daher gegebenenfalls im Druckraum vorhandene Flüssigkeit über einen oder mehrere der Durchlässe 31 in den Arbeitsraum 15 abfließen und über die beispielsweise durch eine Dichtungsschraube verschließbare Öffnung 42 abgelassen werden. Es ist daher keine separate Auslassöffnung für den Druckraum erforderlich, was die Herstellungskosten weiter verringert. It can also be seen that the bottom region 41 of the pressure chamber 29 ends geodetically higher in the pump according to the invention than in the known pump of FIG. 1, namely approximately at the level of the passages 31 in the impeller 16. When the pump is at a standstill, any liquid present in the pressure chamber can flow into the working chamber 15 via one or more of the passages 31 and be drained via the opening 42, which can be closed, for example, by a sealing screw. There is therefore no need for a separate outlet opening for the pressure chamber, which further reduces the manufacturing costs.

Claims

Patentansprüche claims
1. Flüssigkeitsringpumpe (10) zum Fördern von Fluiden mit einem ersten, antriebseitigen Gehäuseteil (11 ) und einem zweiten, stirnseitigen Gehäuseteil (12), die über eine Nut/Feder-Anordnung (38) miteinander verbunden sind und einen Arbeitsraum (15) umgeben; wenigstens einem in dem Arbeitsraum (15) drehbar angeordneten, mit1. Liquid ring pump (10) for conveying fluids with a first, drive-side housing part (11) and a second, front-side housing part (12), which are connected to one another via a tongue and groove arrangement (38) and surround a working space (15) ; at least one rotatably arranged in the working space (15) with
Schaufeln (27) versehenen Laufrad (16), Steuermitteln (22), die im Inneren der Pumpe einen Saug- und einenBlades (27) provided impeller (16), control means (22) inside the pump and a suction
Druckraum (25,29) definieren, dadurch gekennzeichnet, dass die Nut/Feder-Anordnung (38) zentrisch zu der Drehachse (13) desDefine pressure chamber (25, 29), characterized in that the tongue and groove arrangement (38) is centered on the axis of rotation (13) of the
Laufrades (16) ausgebildet ist.Impeller (16) is formed.
2. Flüssigkeitsringpumpe gemäß Anspruch 1 , dadurch gekennzeichnet, dass die zentrische Nut/Feder-Anordnung (38) wenigstens eine zu der Drehachse (13) des Laufrades (16) konzentrische, in einem der beiden Gehäuseteil (11 ,12) vorgesehene Federn (39) und wenigstens eine zur Drehachse (13) des Laufrades (16) konzentrische, in dem anderen Gehäuseteil (12,11) ausgesparte Nut (40) umfasst.2. Liquid ring pump according to claim 1, characterized in that the central tongue / groove arrangement (38) at least one to the axis of rotation (13) of the impeller (16) concentric, in one of the two housing parts (11, 12) provided springs (39 ) and at least one groove (40) which is concentric with the axis of rotation (13) of the impeller (16) and is recessed in the other housing part (12, 11).
3. Flüssigkeitsringpumpe gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Steuermittel zumindest eine im Inneren der Pumpe drehfest angeordnete Steuernabe (22) umfassen, die mindestens eine3. Liquid ring pump according to one of claims 1 or 2, characterized in that the control means comprise at least one control hub (22) which is arranged in a rotationally fixed manner inside the pump and which has at least one
Saugöffnung (24) und/oder mindestens eine Drucköffnung (23) aufweist.Has suction opening (24) and / or at least one pressure opening (23).
4. Flüssigkeitsringpumpe gemäß Anspruch 3, dadurch gekennzeichnet, dass die Drucköffnungen (23) der Steuemabe (22) zumindest teilweise mit Ventilen (28) versehen sind. 4. Liquid ring pump according to claim 3, characterized in that the pressure openings (23) of the control hub (22) are at least partially provided with valves (28).
5. Flüssigkeitsringpumpe gemäß Anspruch 4, dadurch gekennzeichnet, dass die Ventile (28) Ventilklappen oder Ventilkörper aufweisen.5. Liquid ring pump according to claim 4, characterized in that the valves (28) have valve flaps or valve bodies.
6. Flüssigkeitsringpumpe gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Pumpe eine einzelne verschließbare6. Liquid ring pump according to one of claims 1 to 5, characterized in that the pump is a single closable
Entleerungsöffnung (42) aufweist, über die der Druckraum (29) und Saugraum (25) entleert werden können.Has discharge opening (42) through which the pressure chamber (29) and suction chamber (25) can be emptied.
7. Flüssigkeitsringpumpe gemäß Anspruch 6, dadurch gekennzeichnet, dass der untere Bereich (41) des Druckraums (29) geodätisch im wesentlichen auf7. Liquid ring pump according to claim 6, characterized in that the lower region (41) of the pressure chamber (29) on geodetically essentially
Höhe von Durchlässen (31 ) liegt, die in dem Laufrad (16) ausgespart sind. Height of passages (31), which are recessed in the impeller (16).
EP03740369A 2002-06-28 2003-06-27 Liquid ring pump Expired - Lifetime EP1518055B1 (en)

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WO2004003388A1 (en) 2004-01-08
CN100398830C (en) 2008-07-02
CN1671965A (en) 2005-09-21
DE50302194D1 (en) 2006-04-06
ATE315725T1 (en) 2006-02-15
DE20210003U1 (en) 2003-11-13
EP1518055B1 (en) 2006-01-11
AU2003279806A1 (en) 2004-01-19

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