EP0756670B1 - Annular liquid gas pump - Google Patents

Annular liquid gas pump Download PDF

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Publication number
EP0756670B1
EP0756670B1 EP95917930A EP95917930A EP0756670B1 EP 0756670 B1 EP0756670 B1 EP 0756670B1 EP 95917930 A EP95917930 A EP 95917930A EP 95917930 A EP95917930 A EP 95917930A EP 0756670 B1 EP0756670 B1 EP 0756670B1
Authority
EP
European Patent Office
Prior art keywords
space
chamber
pressure chamber
hub
gas pump
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
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EP95917930A
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German (de)
French (fr)
Other versions
EP0756670A1 (en
Inventor
Klaus Domagalla
Udo Segebrecht
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Sterling Fluid Systems Germany GmbH
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Sterling Fluid Systems Germany GmbH
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Publication of EP0756670A1 publication Critical patent/EP0756670A1/en
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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
    • F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply

Definitions

  • connection housing Sufficiently dimensioned channels are provided for this in the housing part that contains the pressure chamber and forms the connections and which is therefore referred to below as the connection housing.
  • This junction box the mechanical seal can also be used within a designated hub space included, which must be lubricated and cooled during operation. This happens in the prior art in that the fresh liquid is passed through the hub space or that a partial flow is branched off from the liquid ring, via the mechanical seal guided and fed back to the work area on the suction side (DE-U-7017341).
  • the invention is based, the Reduce fresh fluid requirements or simplify fluid management. she achieves this in that the circulating fluid for lubricating the mechanical seal is used by the connection for the return of the return liquid from the Pressure chamber is led into the work space via the hub space.
  • This has compared to those known pumps in which the mechanical seal by means of fresh liquid is lubricated, the advantage that the part used as a cooling flow in the pressure chamber located liquid reduces the fresh liquid requirement and cooling the Seal is not dependent on the constant fresh liquid supply. This can therefore be diminished and need not be maintained continuously.
  • the cooling by a specially for this is effected from the liquid ring branched off, this has the advantage of Simplification.
  • the management of the extension leads to the side of the pump containing the suction chamber has a largely horizontal course the extension, which is a good separation of what may still be included Gas fraction allows before reaching the hole from extension to Hub space leads.
  • the extension should in other words, to the side beyond the vertical diameter of the pump lead, preferably below the hub space, because in the low-lying area in the pressure chamber the gas content in the liquid is lower than in the higher one. Also has this Construction the advantage that it is very simple.
  • the function of the pressure chamber extension to calm the circulating fluid requires that the cross section of the pressure chamber extension is large compared to the cross section of the bore leading into the hub space or the cross section of the flow paths from the hub space into the work space to lead.
  • the shaft 1 of the pump is in a motor or bearing block, not shown overhung, which is flanged to the connection housing 2.
  • the Connection housing forms the suction port 3 and the pressure port 4, the connected to the suction chamber 5 and the pressure chamber 6 within the housing are. When installed horizontally, they are above each other through a wall 7 separated, which runs approximately vertically. Below they are through walls 8 or 9 limited. In the middle they are delimited by an annular wall 10 which includes a hub space 11 in which a mechanical seal 12 is housed.
  • a pressure chamber extension branches from the lower area of the pressure chamber 6 18 from which leads below the hub space 11 to the other side of the connection housing.
  • the other side is in this context understand the side from the pressure chamber side by the diameter is separated, which is determined by the wall 7, which in the upper region Separates the pressure chamber from the suction chamber. Instead, you can also use the vertical Diameter can be switched off, in the present example with the through the wall 7 has a certain diameter.
  • a bore 19 is in the Wall 10 is provided through which the circulating liquid from the pressure chamber 6 in can cross the hub space 11. It is expediently arranged that it is directed towards the area of the mechanical seal to be cooled, to intensify cooling there on the one hand and possibly on the other to rinse off adhering gas bubbles.
  • the circulating fluid After the circulating fluid has flowed through the hub space 11, it passes through the in the control disc 13 provided shaft bore on the end face 20 of the hub of the Impeller 17 and flows - mainly on the suction side - between this and the control disk 13 through into the work space.

Landscapes

  • 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)
  • Gyroscopes (AREA)
  • Gas Separation By Absorption (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PCT No. PCT/EP95/01433 Sec. 371 Date Oct. 15, 1996 Sec. 102(e) Date Oct. 15, 1996 PCT Filed Apr. 18, 1995 PCT Pub. No. WO95/29340 PCT Pub. Date Nov. 2, 1995Liquid-ring gas pump with a working space containing an overhung impeller (17) and a connection casing (2) which is separated from the working space by a control plate (13). This casing contains, on one side of a hub space (11) suitable for the accommodation of a mechanical seal (12), an inlet space (5) and, on the other side, a discharge space (6). The discharge space is connected to the working space to allow the recirculation of recirculated liquid. The connection between the discharge space and the working space is passed via the hub space. The hole (19) connecting the discharge space to the hub space is expediently situated on an extension (18) of the discharge space (6), the said extension leading across to the side of the pump containing the inlet space.

Description

Bei einer Flüssigkeitsringgaspumpe beteiligt sich der im Arbeitsraum mit dem Flügelrad umlaufende Flüssigkeitsring an der Kompression des in den Flügelradzellen eingeschlossenen Gases. Dabei wird die Innenfläche des Flüssigkeitsrings nahe an die Drucköffnung herangeführt, durch die das Gas aus dem Arbeitsraum in den Druckraum übertritt, und es findet auch bis zu einem gewissen Grade eine Durchmischung von Gas und Flüssigkeit statt. Es ist daher nicht zu vermeiden, daß ständig Betriebsflüssigkeit aus dem Arbeitsraum in den Druckraum übertritt und dadurch dem Flüssigkeitsring verlorengeht. Dieser Betriebsflüssigkeitsverlust wird teilweise durch Frischflüssigkeitszufuhr und zum anderen Teil durch Rückführung von Flüssigkeit aus dem Druckraum als sogenannte Umlaufflüssigkeit in den Arbeitsraum ausgeglichen. Dafür sind ausreichend bemessene Kanäle vorgesehen in demjenigen Gehäuseteil, der den Druckraum enthält und die Anschlüsse bildet und der deshalb im folgenden als Anschlußgehäuse bezeichnet wird. Dieses Anschlußgehäuse kann auch innerhalb eines dafür vorgesehenen Nabenraums die Gleitringdichtung enthalten, die während des Betriebs geschmiert und gekühlt werden muß. Dies geschieht im Stand der Technik dadurch, daß die Frischflüssigkeit durch den Nabenraum geführt wird oder daß aus dem Flüssigkeitsring ein Teilstrom abgezweigt, über die Gleitringdichtung geführt und dem Arbeitsraum auf der Saugseite wieder zugeführt wird (DE-U-7017341).In the case of a liquid ring gas pump, it participates in the working area with the impeller encircling liquid ring at the compression of the enclosed in the impeller cells Gas. The inner surface of the liquid ring is close to the pressure opening introduced, through which the gas passes from the work space into the pressure space, and it also finds a mixture of gas and liquid to a certain degree instead of. It is therefore unavoidable that operating fluid is constantly coming out of the work area passes into the pressure chamber and the liquid ring is thereby lost. This Operating fluid loss is partly due to fresh fluid supply and secondly Part by returning liquid from the pressure chamber as a so-called circulation liquid balanced in the work space. Sufficiently dimensioned channels are provided for this in the housing part that contains the pressure chamber and forms the connections and which is therefore referred to below as the connection housing. This junction box the mechanical seal can also be used within a designated hub space included, which must be lubricated and cooled during operation. this happens in the prior art in that the fresh liquid is passed through the hub space or that a partial flow is branched off from the liquid ring, via the mechanical seal guided and fed back to the work area on the suction side (DE-U-7017341).

Der Erfindung liegt die Aufgabe zugrunde, den Frischflüssigkeitsbedarf zu verringern bzw. die Flüssigkeitsführung zu vereinfachen. Sie erreicht dies dadurch, daß die Umlaufflüssigkeit zur Schmierung der Gleitringdichtung verwendet wird, indem die Verbindung zur Rückführung der Rückflüssigkeit aus dem Druckraum in den Arbeitsraum über den Nabenraum geführt ist. Dies hat im Vergleich mit denjenigen bekannten Pumpen, bei denen die Gleitringdichtung mittels Frischflüssigkeit geschmiert wird, den Vorteil, daß der als Kühlstrom verwendete Teil der im Druckraum befindlichen Flüssigkeit den Frischflüssigkeitsbedarf vermindert und die Kühlung der Dichtung nicht von der ständigen Frischflüssigkeitszuführung abhängig ist. Diese kann daher vermindert werden und braucht nicht ständig aufrechterhalten zu werden. Gegenüber der obengenannten bekannten Pumpe, bei der die Kühlung durch einen speziell dafür vom Flüssigkeitsring abgezweigten Strom bewirkt wird, hat dies den Vorteil der Vereinfachung.The invention is based, the Reduce fresh fluid requirements or simplify fluid management. she achieves this in that the circulating fluid for lubricating the mechanical seal is used by the connection for the return of the return liquid from the Pressure chamber is led into the work space via the hub space. This has compared to those known pumps in which the mechanical seal by means of fresh liquid is lubricated, the advantage that the part used as a cooling flow in the pressure chamber located liquid reduces the fresh liquid requirement and cooling the Seal is not dependent on the constant fresh liquid supply. This can therefore be diminished and need not be maintained continuously. Across from the aforementioned known pump, in which the cooling by a specially for this is effected from the liquid ring branched off, this has the advantage of Simplification.

Bei einer weiteren bekannten Pumpe (DE-A-19 03 887) ist der die Dichtung enthaltende Raum mit dem Arbeitsraum über einen Kanal verbunden, durch den Flüssigkeit sowohl zu- als auch abfließen, also ausgetauscht werden kann. Zwar steht der Dichtungsraum mit dem Arbeitsraum außerdem auch über einen Flügelradspalt in Verbindung; da dieser Spalt aber möglichst weitgehend abgedichtet sein soll, ist er nicht hinreichend für die Rückführung der Umlaufüssigkeit.In another known pump (DE-A-19 03 887) is the one containing the seal Space connected to the work space via a channel through which liquid can both as well as drain, so can be exchanged. The sealing chamber is with the work area also connected via an impeller gap; since this However, the gap should be sealed as much as possible, it is not sufficient for the Return of circulating liquid.

Es hat sich gezeigt, daß die Befürchtung, daß der unvermeidliche Gasgehalt der im Druckraum befindlichen Umlaufflüssigkeit die Kühlung stören könnte, nicht zutrifft, wenn man die Umlaufflüssigkeit dem Druckraum an einer Stelle entnimmt, an der sich die Flüssigkeit in beruhigtem Zustand befindet und der Gasanteil im wesentlichen abgeschieden ist. Dies läßt sich nach der Erfindung insbesondere dann gewährleisten, wenn der Druckraum für die Entnahme der Umlaufflüssigkeit mit einer Verlängerung versehen wird, die vom Druckraum zu der den Saugraum enthaltenden Seite der Pumpe hinüberführt. Zum einen ist schon aufgrund der Länge des Flüssigkeitswegs, die durch die Verlängerung des Druckraums geschaffen wird, größere Gewähr für einen ruhigen Zustand und Gasblasenfreiheit der Umlaufflüssigkeit gegeben. Zum anderen bedingt die Führung der Verlängerung zu der den Saugraum enthaltenden Seite der Pumpe einen weitgehend horizontalen Verlauf der Verlängerung, der eine gute Abscheidung des möglicherweise noch enthaltenen Gasanteils ermöglicht, bevor die Bohrung erreicht wird, die von der Verlängerung zum Nabenraum führt. Wenn die Pumpe mit horizontaler Welle aufgestellt wird, soll die Verlängerung mit anderen Worten auf die Seite jenseits des vertikalen Durchmessers der Pumpe führen, und zwar vorzugsweise unterhalb des Nabenraums, weil im tief gelegenen Bereich des Druckraums der Gasanteil in der Flüssigkeit geringer ist als im höheren. Auch hat diese Bauweise den Vorteil, daß sie sehr einfach ist.It has been shown that the fear that the inevitable gas content in the pressure chamber circulating liquid could interfere with the cooling, does not apply if one the circulating liquid takes from the pressure chamber at a point where the liquid is in a calm state and the gas portion is essentially separated. This can be ensured according to the invention in particular if the pressure space for the removal of the circulating fluid is provided with an extension from the pressure chamber leads to the side of the pump containing the suction space. For one thing already due to the length of the fluid path, which is caused by the extension of the pressure chamber is created, greater guarantee of a calm state and freedom from gas bubbles given the circulating fluid. On the other hand, the management of the extension leads to the side of the pump containing the suction chamber has a largely horizontal course the extension, which is a good separation of what may still be included Gas fraction allows before reaching the hole from extension to Hub space leads. If the pump is installed with a horizontal shaft, the extension should in other words, to the side beyond the vertical diameter of the pump lead, preferably below the hub space, because in the low-lying area in the pressure chamber the gas content in the liquid is lower than in the higher one. Also has this Construction the advantage that it is very simple.

Die Funktion der Druckraumverlängerung zur Beruhigung der Umlaufflüssigkeit verlangt, daß der Querschnitt der Druckraumverlängerung groß ist gegenüber dem Querschnitt der in den Nabenraum hinüberführenden Bohrung bzw. des Querschnitts der Strömungswege, die vom Nabenraum in den Arbeitsraum führen.The function of the pressure chamber extension to calm the circulating fluid requires that the cross section of the pressure chamber extension is large compared to the cross section of the bore leading into the hub space or the cross section of the flow paths from the hub space into the work space to lead.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel schematisch veranschaulicht. Darin zeigen:

Fig. 1
einen Längsschnitt durch die Flüssigkeitsringgaspumpe und
Fig. 2
eine Draufsicht auf das Anschlußgehäuse von der Steuerscheibe her.
The invention is explained in more detail below with reference to the drawing, which schematically illustrates an advantageous embodiment. In it show:
Fig. 1
a longitudinal section through the liquid ring gas pump and
Fig. 2
a plan view of the connector housing from the control disk.

Die Welle 1 der Pumpe ist in einem nicht gezeigten Motor oder Lagerbock fliegend gelagert, der an das Anschlußgehäuse 2 angeflanscht wird. Das Anschlußgehäuse bildet den Sauganschluß 3 und den Druckanschluß 4, die innerhalb des Gehäuses mit dem Saugraum 5 und dem Druckraum 6 verbunden sind. Sie sind bei horizontaler Aufstellung oben durch eine Wand 7 voneinander getrennt, die etwa vertikal verläuft. Unten sind sie durch Wände 8 bzw. 9 begrenzt. In der Mitte sind sie von einer Ringwand 10 begrenzt, die einen Nabenraum 11 einschließt, in welchem eine Gleitringdichtung 12 untergebracht ist.The shaft 1 of the pump is in a motor or bearing block, not shown overhung, which is flanged to the connection housing 2. The Connection housing forms the suction port 3 and the pressure port 4, the connected to the suction chamber 5 and the pressure chamber 6 within the housing are. When installed horizontally, they are above each other through a wall 7 separated, which runs approximately vertically. Below they are through walls 8 or 9 limited. In the middle they are delimited by an annular wall 10 which includes a hub space 11 in which a mechanical seal 12 is housed.

Diese Räume werden stirnseitig durch eine Steuerscheibe 13 geschlossen, die im Bereich des Saugraums 5 eine Saugöffnung 14 und im Bereich der Druckraum eine oder mehrere Drucköffnungen 15 enthält. Jenseits der Steuerscheibe 13 schließt ein topfförmiges Arbeitsraumgehäuse 16 den Arbeitsraum ein, in welchem das Flügelrad 17 auf der Welle 1 exzentrisch umläuft. Der gegenüber dem Flügelrad exzentrisch in dem Arbeitsraum umlaufende Flüssigkeitsring führt periodisch zur Vergrößerung (Saugseite) und Verkleinerung (Druckseite) des freien Volumens der Flügelradzellen und bewirkt dadurch die Förderung des gasförmigen Mediums, das aus dem Saugraum 5 durch Saugöffnungen 14 angesaugt und zusammen mit einem Teil der Betriebsflüssigkeit durch die Drucköffnung 15 in den Druckraum 6 ausgestoßen wird.These spaces are closed at the end by a control disk 13, which in the area of the suction chamber 5 has a suction opening 14 and in the area of the Pressure chamber contains one or more pressure openings 15. Beyond the Control disc 13 closes a pot-shaped work space housing 16 the work space a, in which the impeller 17 on the shaft 1 eccentric circulates. The one that rotates eccentrically in the work area with respect to the impeller Liquid ring periodically leads to enlargement (suction side) and Reduction (pressure side) of the free volume of the impeller cells and thereby causes the conveyance of the gaseous medium from the suction chamber 5 sucked through suction openings 14 and together with part of the Operating fluid is expelled through the pressure opening 15 into the pressure chamber 6 becomes.

Aus dem unteren Bereich des Druckraums 6 zweigt eine Druckraumverlängerung 18 ab, die unterhalb des Nabenraums 11 hinüberführt zu der anderen Seite des Anschlußgehäuses. Unter der anderen Seite ist in diesem Zusammenhang die Seite zu verstehen, die von der Druckraumseite durch den Durchmesser getrennt ist, der durch die Wand 7 bestimmt ist, die im oberen Bereich den Druckraum vom Saugraum trennt. Stattdessen kann auch auf den vertikalen Durchmesser abgestellt werden, der im vorliegenden Beispiel mit dem durch die Wand 7 bestimmten Durchmesser übereinstimmt.A pressure chamber extension branches from the lower area of the pressure chamber 6 18 from which leads below the hub space 11 to the other side of the connection housing. The other side is in this context understand the side from the pressure chamber side by the diameter is separated, which is determined by the wall 7, which in the upper region Separates the pressure chamber from the suction chamber. Instead, you can also use the vertical Diameter can be switched off, in the present example with the through the wall 7 has a certain diameter.

Im druckraumfernen Bereich der Verlängerung 18 ist eine Bohrung 19 in der Wand 10 vorgesehen, durch die die Umlaufflüssigkeit aus dem Druckraum 6 in den Nabenraum 11 übertreten kann. Sie ist zweckmäßigerweise so angeordnet, daß sie auf den zu kühlenden Bereich der Gleitringdichtung gerichtet ist, um einerseits dort die Kühlung zu intensivieren und andererseits möglicherweise anhaftende Gasblasen abzuspülen. Nachdem die Umlaufflüssigkeit den Nabenraum 11 durchströmt hat, gelangt sie durch die in der Steuerscheibe 13 vorgesehene Wellenbohrung an die Stirnfläche 20 der Nabe des Flügelrads 17 und strömt - vornehmlich auf der Saugseite - zwischen dieser und der Steuerscheibe 13 hindurch in den Arbeitsraum.In the area of the extension 18 remote from the pressure chamber, a bore 19 is in the Wall 10 is provided through which the circulating liquid from the pressure chamber 6 in can cross the hub space 11. It is expediently arranged that it is directed towards the area of the mechanical seal to be cooled, to intensify cooling there on the one hand and possibly on the other to rinse off adhering gas bubbles. After the circulating fluid has flowed through the hub space 11, it passes through the in the control disc 13 provided shaft bore on the end face 20 of the hub of the Impeller 17 and flows - mainly on the suction side - between this and the control disk 13 through into the work space.

Diese Funktion ist unabhängig davon gewährleistet, ob die Pumpe als Vakuumpumpe oder als Kompressor benutzt wird, da in jedem Fall der Nabenraum 11 unter einem Druck steht, der nicht wesentlich geringer als der im Druckraum 6 herrschende Druck ist, während im Arbeitsraum zumindest ein Umfangsbereich auf einem niedrigeren Druckniveau liegt.This function is guaranteed regardless of whether the pump is a vacuum pump or used as a compressor, because in any case the hub space 11 is under a pressure that is not significantly less than that in Pressure chamber 6 is prevailing pressure, while at least one in the work space Circumferential area is at a lower pressure level.

Claims (4)

  1. A liquid ring gas pump with a working chamber containing an impeller (17) mounted overhung and with a connector housing (2) which is separated therefrom by a control plate (13) and which on one side of a hub chamber (11) suitable for accommodating a slip ring seal (12) contains a suction chamber (5) and on the other side a pressure chamber (6), wherein the pressure chamber (6) is connected with the working chamber via flow cross-sections which are of sufficient size for the return of circulating liquid, characterised in that the connection between the pressure chamber (6) and the working chamber passes via the hub chamber (11).
  2. A liquid ring gas pump according to Claim 1, characterised in that a bore (19) connecting the pressure chamber (6) with the hub chamber (11) is situated on an extension (18) of the pressure chamber (6) leading across to the side of the pump containing the suction chamber.
  3. A liquid ring gas pump according to Claim 2, characterised in that when assembling the pump on a horizontal shaft the bore (19) is situated on the other side of the vertical diameter (viewed from the pressure chamber).
  4. A liquid ring gas pump according to Claim 3, characterised in that the extension (18) of the pressure chamber (6) is situated under the hub chamber (11).
EP95917930A 1994-04-20 1995-04-18 Annular liquid gas pump Expired - Lifetime EP0756670B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9406597U 1994-04-20
DE9406597U DE9406597U1 (en) 1994-04-20 1994-04-20 Liquid ring gas pump
PCT/EP1995/001433 WO1995029340A1 (en) 1994-04-20 1995-04-18 Annular liquid gas pump

Publications (2)

Publication Number Publication Date
EP0756670A1 EP0756670A1 (en) 1997-02-05
EP0756670B1 true EP0756670B1 (en) 1998-11-04

Family

ID=6907612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95917930A Expired - Lifetime EP0756670B1 (en) 1994-04-20 1995-04-18 Annular liquid gas pump

Country Status (15)

Country Link
US (1) US5735674A (en)
EP (1) EP0756670B1 (en)
JP (1) JP2736287B2 (en)
CN (1) CN1062941C (en)
AT (1) ATE173057T1 (en)
AU (1) AU2406495A (en)
CA (1) CA2187426C (en)
CZ (1) CZ285858B6 (en)
DE (2) DE9406597U1 (en)
DK (1) DK0756670T3 (en)
ES (1) ES2124547T3 (en)
MY (1) MY114165A (en)
SK (1) SK280349B6 (en)
TW (1) TW265396B (en)
WO (1) WO1995029340A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1274050A (en) * 1999-05-14 2000-11-22 杨双来 High-presure air pump
FI126831B (en) * 2010-04-14 2017-06-15 Evac Oy NESTEREN PUMP AND METHOD FOR USING A NESTEREN PUMP
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

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Publication number Priority date Publication date Assignee Title
US1668532A (en) * 1924-09-08 1928-05-01 W L Stewart Rotary machine
DE970813C (en) * 1942-11-07 1958-10-30 Schweizerische Lokomotiv Water ring pump for gaseous material to be conveyed
CH230129A (en) * 1942-11-07 1943-12-15 Schweizerische Lokomotiv Liquid ring pump.
GB955091A (en) * 1959-07-07 1964-04-15 Cotton Ltd W Improvements in or relating to straight bar knitting machines
US3209987A (en) * 1961-02-20 1965-10-05 Nash Engineering Co Liquid ring pump
NL156793B (en) * 1968-05-17 1978-05-16 Nash Engineering Co LIQUID RING PUMP WITH LIQUID SEPARATOR.
DE2022104C3 (en) * 1969-05-09 1979-02-08 The Nash Engineering Co., Norwalk, Conn. (V.St.A.) Motor-driven liquid ring pump
US3713749A (en) * 1970-09-30 1973-01-30 Nash Engineering Co Motor-driven pedestal-mounted pump assembly and method for manufacturing the same
DE2318538B2 (en) * 1973-04-12 1975-12-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen Distributor for a liquid ring gas compressor
US3894812A (en) * 1974-02-19 1975-07-15 Atlantic Fluidics Inc Liquid ring vacuum pump-compressor
US4498844A (en) * 1983-08-08 1985-02-12 The Nash Engineering Company Liquid ring pump with conical or cylindrical port member
US4755107A (en) * 1986-05-14 1988-07-05 Siemens Aktiengesellschaft Liquid-ring pump having additional openings in control disc for warm and cold liquid
DE3617344A1 (en) * 1986-05-23 1987-11-26 Siemens Ag METHOD FOR PRODUCING A CONTROL DISC OR A CONTROL SHIELD FOR A LIQUID RING MACHINE FOR MORE AGGRESSIVE MEDIA
DE4118843A1 (en) * 1991-06-07 1993-02-11 Sihi Gmbh & Co Kg Liquid ring gas pump with overhung impeller - has stand mounted to part of housing remote from drive
DE4229017C2 (en) * 1992-09-03 1995-05-24 Sihi Gmbh & Co Kg Liquid ring compressor in engine block or engine carrier design
DE4332275A1 (en) * 1993-09-23 1995-03-30 Sihi Gmbh & Co Kg Control disc for a liquid ring gas pump

Also Published As

Publication number Publication date
CZ289696A3 (en) 1997-03-12
TW265396B (en) 1995-12-11
MY114165A (en) 2002-08-30
ATE173057T1 (en) 1998-11-15
DE9406597U1 (en) 1995-08-24
EP0756670A1 (en) 1997-02-05
CN1146233A (en) 1997-03-26
CA2187426A1 (en) 1995-11-02
SK130596A3 (en) 1997-06-04
JPH09506151A (en) 1997-06-17
SK280349B6 (en) 1999-12-10
WO1995029340A1 (en) 1995-11-02
JP2736287B2 (en) 1998-04-02
DE59504151D1 (en) 1998-12-10
ES2124547T3 (en) 1999-02-01
CA2187426C (en) 2002-07-23
US5735674A (en) 1998-04-07
DK0756670T3 (en) 1999-07-19
CN1062941C (en) 2001-03-07
CZ285858B6 (en) 1999-11-17
AU2406495A (en) 1995-11-16

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