EP0245626B1 - Liquid-ring machine - Google Patents

Liquid-ring machine Download PDF

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Publication number
EP0245626B1
EP0245626B1 EP87104438A EP87104438A EP0245626B1 EP 0245626 B1 EP0245626 B1 EP 0245626B1 EP 87104438 A EP87104438 A EP 87104438A EP 87104438 A EP87104438 A EP 87104438A EP 0245626 B1 EP0245626 B1 EP 0245626B1
Authority
EP
European Patent Office
Prior art keywords
slit
liquid
slot
impeller
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.)
Expired - Lifetime
Application number
EP87104438A
Other languages
German (de)
French (fr)
Other versions
EP0245626A3 (en
EP0245626A2 (en
Inventor
Peter Dipl.-Ing. Trimborn
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0245626A2 publication Critical patent/EP0245626A2/en
Publication of EP0245626A3 publication Critical patent/EP0245626A3/en
Application granted granted Critical
Publication of EP0245626B1 publication Critical patent/EP0245626B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/005—Details concerning the admission or discharge
    • F04C19/007—Port members in the form of side plates

Definitions

  • the invention relates to a liquid ring machine with an eccentrically arranged within a housing, rotating in engagement with a rotating liquid ring, the shaft of which is rotatably mounted in bearing plates arranged on both sides of the housing and at least one bearing plate as with inlets and outlets for the medium to be conveyed and with Connections for the liquid ring additionally supplied operating fluids is formed according to the preamble of claim 1.
  • Such a liquid ring machine is known from DE-B 10 27 358, in which correspondingly heated partial liquid is drained from the rotating liquid ring behind the end of the pressure slot via an opening in the control disk and is supplied via a radial transverse groove to a shaft-concentric ring groove covered by the impeller hub, from which this partial liquid flows again radially over the entire circumference of the annular groove as a sealing gap liquid to the rotating liquid ring.
  • a second, colder portion of the operating fluid which replaces the fluid ring losses, is supplied to the fluid ring from the outside at a lower pressure via an opening between the end of the suction slot and the beginning of the pressure slot which is not covered by the impeller hub, e.g. from a liquid separator arranged downstream of the outlet of the control plate.
  • the amount of operating fluid flowing into the rotating liquid ring is warmer than the coolest partial liquid, which worsens the condensation effect in the case of moisture or water vapor extraction and increases evaporation when conveying dry air.
  • the invention has for its object to improve the condensation effect in liquid ring machines, in particular in pumps of the type mentioned, to reduce the evaporation when conveying dry air and thus to increase the pumping speed of the machine.
  • a known double-flow liquid ring machine is shown in an exploded view, in which the mixture of warmer and colder operating liquid portions takes place in the respective side plate 1 and the mixture of both through the passage 2 in the respective control disc 3 in the gap between the control disc 3 and paddle wheel 4th flows.
  • control disk is designed according to an exemplary embodiment, which is shown in FIG. 2 as a plan view of the inside facing the paddle wheel and in FIG. 3 as a section along line 111-111 of FIG. 2.
  • a partial annular groove 8 is provided, which is connected to at least one opening 9, 9 "and this opening 9 opens into a separate chamber in the side plate, which chamber is connected exclusively to a coolant inlet which a fresh water line or a liquid separator is connected via a recooler behind the outlet grooves in the side plate.
  • the partial ring groove 8 extends at least over the entire area of the suction slot 5 and can be led out of the impeller hub area at one end 8A behind the end of the suction slot. Furthermore, the partial ring groove can be extended beyond the beginning of the suction slot and optionally, as shown in broken lines, can be guided out of the paddle wheel hub area and connected there with an opening 9 '.
  • the one or more openings 9, 9 ', 9 " can advantageously be provided at said end 8A of the partial annular groove 8, so that a cold, evenly distributed portion of cold fissure liquid flows over the entire suction slot 5 in the direction of the impeller rotation and outwards, which optimizes the condensation effect.
  • a separate partial annular groove 10, 10 ' is provided, which extends at least from the beginning of the pressure slot 6 to at most before the end of the same, in particular up to controllable sub-areas and with at least one opening 11, 11 'is connected, which opens into a separate chamber in the side plate, a separator or the rotating liquid ring, through which warmer liquid flows into the liquid ring in a known manner, so that from this chamber via the opening 11 and the partial ring groove 10, 10 'the gap sealing liquids are returned to the liquid ring.
  • the opening 11 is covered by the impeller hub and can be connected to a recess 11A which extends radially outward beyond the impeller hub.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Description

Die Erfindung betrifft eine Flüssigkeitsringmaschine mit einem innerhalb eines Gehäuses exzentrisch angeordneten, in Eingriff mit einem rotierenden Flüssigkeitsring umlaufenden Schaufelrad, dessen Welle in beiderseits des Gehäuses angeordneten Lagerschilden drehbar gelagert ist und wenigstens ein Lagerschild als mit Ein- und Auslässen für das zu fördernde Medium sowie mit Anschlüssen für den Flüssigkeitsring ergänzend zugeführte Betriebsflüssigkeiten ausgebildet ist entsprechend dem Oberbegriff des Patentanspruches 1.The invention relates to a liquid ring machine with an eccentrically arranged within a housing, rotating in engagement with a rotating liquid ring, the shaft of which is rotatably mounted in bearing plates arranged on both sides of the housing and at least one bearing plate as with inlets and outlets for the medium to be conveyed and with Connections for the liquid ring additionally supplied operating fluids is formed according to the preamble of claim 1.

Eine solche Flüssigkeitsringmaschine ist aus der DE-B 10 27 358 bekannt, bei der aus dem rotierenden Flüssigkeitsring hinter dem Ende des Druckschlitzes über eine Öffnung in der Steuerscheibe entsprechend erwärmte Teilflüssigkeit abgeleitet und über eine radiale Quernut einer von der Schaufelradnabe überdeckten wellenkonzentrischen Ringnut zugeleitet wird, von der aus über den ganzen Umfang der Ringnut radial diese Teilflüssigkeit als dichtende Spaltflüssigkeit wieder dem rotierenden Flüssigkeitsring zuströmt. Eine zweite, die Flüssigkeitsringverluste ersetzende kältere Teilmenge der Betriebsflüssigkeit wird von außen her mit niedrigerem Druck über eine von der Schaufelradnabe nicht überdeckte Öffnung zwischen dem Ende des Saugschlitzes und den Anfang des Druckschlitzes dem Flüssigkeitsring zugeführt, z.B. aus einem dem Auslaß des Steuerschildes nachgeordneten Flüssigkeitsabscheider.Such a liquid ring machine is known from DE-B 10 27 358, in which correspondingly heated partial liquid is drained from the rotating liquid ring behind the end of the pressure slot via an opening in the control disk and is supplied via a radial transverse groove to a shaft-concentric ring groove covered by the impeller hub, from which this partial liquid flows again radially over the entire circumference of the annular groove as a sealing gap liquid to the rotating liquid ring. A second, colder portion of the operating fluid, which replaces the fluid ring losses, is supplied to the fluid ring from the outside at a lower pressure via an opening between the end of the suction slot and the beginning of the pressure slot which is not covered by the impeller hub, e.g. from a liquid separator arranged downstream of the outlet of the control plate.

Bei anderen bekannten Pumpenausführungen (US-A 4 545 730) wird im Seitenschild die von außen zugeführte kältere Betriebsflüssigkeitsteilmenge mit der im Sumpf des Seitenschildes sich sammelnden wärmeren Teilmenge aus dem Flüssigkeitsring gemischt und gemeinsam über einen entsprechenden Durchlaß in der Steuerscheibe dem rotierenden Flüssigkeitsring im Gehäuse wieder zugeführt, wobei der besagte Durchlaß im Bereich zwischen Ende des Saugschlitzes und Anfang des Druckschlitzes liegt.In other known pump designs (US-A 4 545 730), the colder operating fluid part supplied from the outside is mixed in the side plate with the warmer part that collects in the sump of the side plate from the liquid ring and together via a corresponding passage in the control disk the rotating liquid ring in the housing again supplied, said passage being in the range between the end of the suction slot and the beginning of the pressure slot.

In beiden Fällen ist zumindest im Abschnitt des Saugschlitzes die dem rotierenden Flüssigkeitsring zugeströmte Betriebsflüssigkeitsmenge wärmer als die kühlste Teilflüssigkeit, was den Kondensationseffekt bei Feuchtigkeits- bzw. Wasserdampfabsaugung verschlechtert und die Ausdampfung bei Trockenluftförderung erhöht.In both cases, at least in the section of the suction slot, the amount of operating fluid flowing into the rotating liquid ring is warmer than the coolest partial liquid, which worsens the condensation effect in the case of moisture or water vapor extraction and increases evaporation when conveying dry air.

Der Erfindung liegt die Aufgabe zugrunde, bei Flüssigkeitsringmaschinen, insb. bei Pumpen der eingangs genannten Art den Kondensationseffekt zu verbessern, die Ausdampfung bei Trockenluftförderung herabzusetzen und damit das Saugvermögen der Maschine zu erhöhen.The invention has for its object to improve the condensation effect in liquid ring machines, in particular in pumps of the type mentioned, to reduce the evaporation when conveying dry air and thus to increase the pumping speed of the machine.

Die Lösung der Aufgabe gelingt mit den kennzeichnenden Merkmalen des Anspruches 1.The problem is solved with the characterizing features of claim 1.

In Fig. 1 ist in explodierter Darstellung eine bekannte zweiflutige Flüssigkeitsringmaschine dargestellt, bei der die Mischung von wärmeren und kälteren Betriebsflüssigkeitsanteilen im jeweiligen Seitenschild 1 stattfindet und die Mischung beider durch den Durchlaß 2 in der jeweiligen Steuerscheibe 3 in den Spalt zwischen Steuerscheibe 3 und Schaufelrad 4 strömt.In Fig. 1, a known double-flow liquid ring machine is shown in an exploded view, in which the mixture of warmer and colder operating liquid portions takes place in the respective side plate 1 and the mixture of both through the passage 2 in the respective control disc 3 in the gap between the control disc 3 and paddle wheel 4th flows.

Zur Erzielung des angestrebten Effektes ist die Steuerscheibe gemäß einem Ausführungsbeispiel ausgebildet, das in Fig. 2 als Draufsicht auf die dem Schaufelrad zugewandte Innenseite und in Fig. 3 als Schnitt nach der Linie 111-111 der Fig. 2 dargestellt ist.To achieve the desired effect, the control disk is designed according to an exemplary embodiment, which is shown in FIG. 2 as a plan view of the inside facing the paddle wheel and in FIG. 3 as a section along line 111-111 of FIG. 2.

Im Bereich zwischen einem einteiligen Saugschlitz 5 und einem Wellendurchlaß 7 ist eine Teilringnut 8 vorgesehen, die mit mindestens einer Öffnung 9, 9" in Verbindung steht und diese Öffnung 9 in eine getrennte Kammer im Seitenschild mündet, welche Kammer ausschließlich mit einem Kühlflüssigkeitseinlaß verbunden, an den eine Frischwasserleitung oder ein Flüssigkeitsabscheider über einen Rückkühler hinter den Auslaßnuten im Seitenschild angeschlossen ist.In the area between a one-piece suction slot 5 and a shaft passage 7, a partial annular groove 8 is provided, which is connected to at least one opening 9, 9 "and this opening 9 opens into a separate chamber in the side plate, which chamber is connected exclusively to a coolant inlet which a fresh water line or a liquid separator is connected via a recooler behind the outlet grooves in the side plate.

Die Teilringnut 8 erstreckt sich mindestens über den gesamten Bereich des Saugschlitzes 5 und kann am einem Ende 8A hinter dem Ende des Saugschlitzes aus dem Schaufelradnabenbereich herausgeführt sein. Weiterhin kann die Teilringnut über den Anfang des Saugschlitzes verlängert und gegebenenfalls wie gestrichelt dargestellt aus dem Schaufelradnabenbereich geführt und dort mit einer Öffnung 9' verbunden sein. Der oder die Öffnungen 9, 9', 9" können vorteilhafterweise am besagten Ende 8A der Teilringnut 8 vorgesehen sein, damit über den ganzen Saugschlitz 5 in Richtung der Schaufelraddrehung und nach außen ein möglichst gleichmäßig verteilter kalter Spaltflüssigkeitsanteil strömt, der den Kondensationseffekt optimiert.The partial ring groove 8 extends at least over the entire area of the suction slot 5 and can be led out of the impeller hub area at one end 8A behind the end of the suction slot. Furthermore, the partial ring groove can be extended beyond the beginning of the suction slot and optionally, as shown in broken lines, can be guided out of the paddle wheel hub area and connected there with an opening 9 '. The one or more openings 9, 9 ', 9 "can advantageously be provided at said end 8A of the partial annular groove 8, so that a cold, evenly distributed portion of cold fissure liquid flows over the entire suction slot 5 in the direction of the impeller rotation and outwards, which optimizes the condensation effect.

Zwischen einem ein- oder wie dargestellt mehrteiligem Druckschlitz 6 und dem Wellendurchlaß 7 ist eine gesonderte Teilringnut 10, 10' vorgesehen, die sich minde stens von Anfang des Druckschlitzes 6 bis höchstens vor dem Ende derselben insbesondere bis zu steuerbaren Teilbereichen erstreckt und mit mindestens einer Öffnung 11, 11' in Verbindung steht, die in eine gesonderte Kammer im Seitenschild, einem Abscheider oder den rotierenden Flüssigkeitsring mündet, durch welche in bekannter Weise wärmere Flüssigkeit in den Flüssigkeitsring fließt, so daß von dieser Kammer über die Öffnung 11 und die Teilringnut 10, 10' die Spaltabdichtflüssigkeiten wieder in den Flüssigkeitsring zurückgeführt werden.Between a one-part or multi-part pressure slot 6 and the shaft passage 7, a separate partial annular groove 10, 10 'is provided, which extends at least from the beginning of the pressure slot 6 to at most before the end of the same, in particular up to controllable sub-areas and with at least one opening 11, 11 'is connected, which opens into a separate chamber in the side plate, a separator or the rotating liquid ring, through which warmer liquid flows into the liquid ring in a known manner, so that from this chamber via the opening 11 and the partial ring groove 10, 10 'the gap sealing liquids are returned to the liquid ring.

Die Öffnung 11 ist von der Schaufelradnabe überdeckt und kann mit einer Nische 11A in Verbindung stehen, die sich über die Schaufelradnabe hinaus radial nach außen erstreckt.The opening 11 is covered by the impeller hub and can be connected to a recess 11A which extends radially outward beyond the impeller hub.

Claims (6)

1. Liquid ring machine with a rotary impeller which is arranged eccentrically inside a housing and is engaged with a rotating liquid ring, the shaft of which impeller is rotatably mounted in side shields which are arranged on each side of the housing, and at least one side shield is constructed both with inlets and outlets for the medium to be conveyed and with connections for operating liquids fed additionally to the liquid ring, and between the said side shield and the housing there is arranged in a sealed manner a control disc which is provided both with intake slits and pressure slits and with apertures for separately supplying operating liquids at different temperatures, the aperture for supplying the warmer operating liquids opening into a slot which is covered by the hub of the impeller and is arranged concentrically between the shaft and the pressure slit, and a slot being provided concentrically between the intake slit and the shaft, which slot is also covered by the hub of the impeller, characterised in that the two slots (8, 10) are formed as slots which are separately from each other, and the slot (8) which is adjacent to the intake slit (5) is connected to at least one aperture (9, 9', 9") which admits by way of the side shield cold operating liquid, and the slot (10, 10') which is adjacent to the pressure slit (6) is connected to at least one aperture (11, 11 which admits by way of the side shield heated-up operating liquid, so that, as a divided liquid, exclusively cold operating liquid flows to the intake slit (5) and exclusively heated-up operating liquid flows to the pressure slit (6).
2. Liquid ring machine according to claim 1, characterised in that the slots (8, 10, 10') are formed as partial ring slots and extend at least over a part of the length of the adjacent slits (5, 6).
3. Liquid ring machine according to claim 2, characterised in that the partial ring slot (8) which is adjacent to the intake slit (5) curves away at the end of the intake slit (8A) so that it projects outward from the region of the impeller.
4. Liquid ring machine according to claim 2 or 3, characterised in that the partial ring slot extends out over the start of the intake slit and curves away so that it projects outward from the region of the impeller hub and is corrected there to the aperture (9').
5. Liquid ring machine according to claim 2, characterised in that the partial ring slot (10, 10') which is adjacent to the pressure slit (6) extends out over the start of the pressure slit in the direction of the intake slit and is connected to an aperture (11) for supplying the warmer operating liquid, which, with a communicating recess (11A), projects radially over the hub of the impeller.
6. Liquid ring machine according to one of claims 1 to 5 with a pressure slit which is divided into controllable partial regions, characterised in that the partial ring slot (10, 10') which is adjacent to the pressure slit (6) extends from the aperture (11, 11') at most only to the end of the partial regions of the pressure slit (6).
EP87104438A 1986-05-14 1987-03-25 Liquid-ring machine Expired - Lifetime EP0245626B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616298 1986-05-14
DE3616298 1986-05-14

Publications (3)

Publication Number Publication Date
EP0245626A2 EP0245626A2 (en) 1987-11-19
EP0245626A3 EP0245626A3 (en) 1988-09-28
EP0245626B1 true EP0245626B1 (en) 1990-01-31

Family

ID=6300852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104438A Expired - Lifetime EP0245626B1 (en) 1986-05-14 1987-03-25 Liquid-ring machine

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US (1) US4755107A (en)
EP (1) EP0245626B1 (en)
DE (1) DE3761581D1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8816296D0 (en) * 1988-07-08 1988-08-10 Caradon Mira Ltd Pump
DE3867068D1 (en) * 1988-11-07 1992-01-30 Siemens Ag LIQUID RING PUMP.
DE4214960C1 (en) * 1992-05-06 1993-11-25 Siemens Ag Liquid ring machine
US5345771A (en) * 1993-03-25 1994-09-13 John Zink Company, A Division Of Koch Engineering Company, Inc. Process for recovering condensable compounds from inert gas-condensable compound vapor mixtures
DE9406597U1 (en) * 1994-04-20 1995-08-24 Sihi GmbH & Co KG, 25524 Itzehoe Liquid ring gas pump
CN1079503C (en) * 1995-08-16 2002-02-20 西门子公司 Ring liquid compression engine
US6106239A (en) * 1997-11-14 2000-08-22 Vooner Vacuum Pumps, Inc. Air flow apparatus for liquid ring vacuum pump
FR2979659A1 (en) * 2011-09-01 2013-03-08 Rene Snyders Rotor for use in rotary volumetric machine, has hub that is defined on its two sides by obturators, where each obturator includes inlet and outlet openings for allowing passage of fluid to distribute axial loads on two sides of rotor
US9689387B2 (en) * 2012-10-30 2017-06-27 Gardner Denver Nash, Llc Port plate of a flat sided liquid ring pump having a gas scavenge passage therein
US11512700B2 (en) * 2015-01-08 2022-11-29 Gardner Denver Nash Llc Low pressure sealing liquid entry area in a compressor type liquid ring pump
CN109356850A (en) * 2018-12-17 2019-02-19 武汉艾德沃泵阀有限公司 A kind of novel water ring vacuum pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195375A (en) * 1935-12-30 1940-03-26 Nash Engineering Co Pump
US2195174A (en) * 1935-12-30 1940-03-26 Irving C Jennings Pump
DE1027358B (en) * 1955-02-08 1958-04-03 Siemens Ag Liquid ring pump
GB1509661A (en) * 1976-02-11 1978-05-04 Grayden Pty Ltd P Water ring vacuum pumps
US4254305A (en) * 1979-02-07 1981-03-03 International Telephone And Telegraph Corporation Current limited subscriber line feed circuit
DE3124867C2 (en) * 1981-06-24 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Liquid ring vacuum pump for gaseous media
SU1121500A1 (en) * 1983-06-29 1984-10-30 Предприятие П/Я А-3605 Fluid-ring machine
JPS6131686A (en) * 1984-07-23 1986-02-14 Fuji Electric Co Ltd Water sealing pump

Also Published As

Publication number Publication date
EP0245626A3 (en) 1988-09-28
US4755107A (en) 1988-07-05
EP0245626A2 (en) 1987-11-19
DE3761581D1 (en) 1990-03-08

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