EP0645521A1 - Liquid ring gas pump - Google Patents

Liquid ring gas pump Download PDF

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Publication number
EP0645521A1
EP0645521A1 EP94114305A EP94114305A EP0645521A1 EP 0645521 A1 EP0645521 A1 EP 0645521A1 EP 94114305 A EP94114305 A EP 94114305A EP 94114305 A EP94114305 A EP 94114305A EP 0645521 A1 EP0645521 A1 EP 0645521A1
Authority
EP
European Patent Office
Prior art keywords
impeller
gas pump
liquid ring
ring gas
pump according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94114305A
Other languages
German (de)
French (fr)
Other versions
EP0645521B1 (en
Inventor
Klaus Dipl.-Ing. Domagalla
Siegfried Dipl.-Ing. Auschrat
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.)
Sihi GmbH and Co KG
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Sihi GmbH and Co KG
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Filing date
Publication date
Application filed by Sihi GmbH and Co KG filed Critical Sihi GmbH and Co KG
Publication of EP0645521A1 publication Critical patent/EP0645521A1/en
Application granted granted Critical
Publication of EP0645521B1 publication Critical patent/EP0645521B1/en
Anticipated expiration legal-status Critical
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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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/01—Materials digest
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49426—Valve or choke making including metal shaping and diverse operation

Definitions

  • the invention relates to a liquid ring gas pump with a working space in which an impeller rotates and which is axially delimited by a control disk, past which the impeller passes at a short distance and which has at least one suction and / or pressure opening for the inlet or outlet of Has gas and liquid in or out of the work space.
  • the gas to be pumped is compressed in the cells of the impeller in that the liquid ring, which is eccentric to the impeller in the working space, penetrates into the impeller on the way of the gas from the inlet to the outlet opening from the outside, thereby reducing the free cell volume.
  • the efficiency depends on the fact that the gas compressed in one cell cannot escape through the gap between the impeller and the control disk to the next cell, in which a lower pressure prevails. Therefore, on the one hand, it is necessary for the impeller to pass the control disk as close as possible, which is generally on the order of a tenth of a millimeter.
  • the impeller must not touch the scrubbing disc, because this can lead to undesirably high wear and even cold welding between the impeller and control disc and thus to the total failure of the pump.
  • the control disks can be manufactured with sufficient accuracy, they have so far been predominantly made of cast or forged material with a large wall thickness, which is complex.
  • a relatively thin-walled To use stainless steel disc which is welded on the side facing away from the work area with a cast or cut out of thick material support body (DE-C 36 17 344).
  • this is also very complex and is only justified if the support body can be made from less expensive material than the stainless steel cover plate.
  • the invention has for its object to provide a control disc that is less expensive than the known, yet dimensionally stable.
  • the solution according to the invention consists in that the control disk made of rolled sheet metal, which is not connected to a special support body, at least partially bent at the edges of the suction or pressure opening to the side facing away from the impeller, rounded on the side facing the impeller and is raised on the side facing away from him.
  • This shape makes it possible to form the control disk from inexpensive rolled material in a simple, non-cutting process.
  • the bent and protruding edges of the control openings projecting towards the side of the impeller have a stiffening effect, so that the control disk is dimensionally stable despite the low material thickness with respect to the prevailing pressure differences.
  • the openings are preferably punched out, the punching process and the flanging process, which leads to the bending of the opening edges, can be combined in one operation.
  • the bending of the opening edges also has the advantage that the material does not warp during this deformation.
  • the end face of the control disk facing the impeller remains flat and generally requires no additional post-processing.
  • control openings and the complete edges of the control openings are designed according to the invention.
  • the thickness of the sheet metal material used is advantageously not more than 4 mm, more appropriately between 2 and 3.5 mm.
  • the rounding of the opening edges on its side facing the impeller makes it possible to create favorable inflow and outflow conditions. In certain areas, in particular on the radially outer edge of the constantly open pressure opening, this rounding can be made with a larger radius than in the other edge areas of this opening or the suction opening.
  • valve seats for the valves can be formed by the bent edge of the openings.
  • these valve openings are not flanged or in any case not raised on the side of the control disk facing away from the impeller; instead, the control disk in the corresponding area on the side facing away from the impeller is rigidly and firmly connected to a special valve housing which forms the valve seats and in this area also gives the control disk rigidity and dimensional stability.
  • the component forming the valve housing can also be used to form the above-mentioned covering of the region of the constantly open outlet opening which is first reached by the wheel vanes. For this purpose, this component receives an extension, a projection or a tongue, which extends partially over the constantly open pressure opening.
  • the outer edge of the control disk can be flanged to stiffen it.
  • beads are introduced in the area of the hub of the impeller, which preferably extend radially or comprise radially extending bending edges.
  • the edge of any shaft passage bore can also be bent and raised on one side.
  • the bent edge can also be used to hold a bearing bush, which is pressed in, for example.
  • Such a bearing bush can be useful if it is provided that the hub of the impeller is supported on the control disk via an axial bearing. This is also useful because it allows the game between the control disc and the vanes of the impeller to be set in the desired size.
  • the liquid ring gas pump 2 which is driven and carried by a drive motor 1, comprises a housing part 3 which forms the suction and pressure connections, one of which can be seen at 4 and which is therefore referred to here as the connection housing. It also includes a working space housing 5, in which the impeller 6 rotates, and a control disk 7 arranged between the connection housing 3 and the working space housing 5.
  • connection housing 3 has a flange 8, which is connected to the motor flange 9, and a housing hub 10, which surrounds a mechanical seal 12 which seals the stub shaft 11 of the motor 1.
  • the connection housing 3 also forms an outer housing jacket 13, from which the connection piece 4 projects and whose flat end face 14 is screwed to the flange 15 of the working space housing 5, including the control disk 7.
  • the stub shaft 11 of the motor 1 carries the hub 16 of the impeller 6, the axial position of which on the stub shaft 11 can be adjusted by means of a known adjusting device 17.
  • the blades of the impeller 6 are connected to one another on the side facing away from the motor 1 by a disk 18 which essentially seals off the cells formed between the blades of the impeller on this side.
  • the impeller cells are open to the control disk 7, so that in a known manner the gas and operating fluid to be conveyed can flow into the impeller cells through the suction opening provided in the control disk 7 and can flow out again through the pressure opening.
  • the control disk has an essentially circular disk shape, possibly with a few radial fastening projections 20 on the circumference.
  • the suction opening 21, the constantly open pressure opening 22 and the pressure openings 23 which can be closed by valves are arranged in the usual place therein.
  • an operating fluid supply opening 24 can be provided at a suitable point, the edge of which is also advantageously flanged.
  • the invention consists of a sheet metal sheet of such thickness that it can be subjected to a non-cutting forming process in which it is cut out, its openings are punched out and the edges involved are bent in a certain manner.
  • the thickness should not be used for this purpose over 4 mm.
  • a thickness of approximately 3 mm up to a working area diameter of approximately 300 mm has proven effective.
  • the entire circumferential edge 26 of the suction opening 21 is flanged, so that it is rounded towards the work area, while the flanged edge part protrudes towards the other side. This results in a flow-favorable guidance of the medium flowing into the work space.
  • the pressure opening is composed of a plurality of individual openings, namely the openings 23 which can be closed by means of valve balls 27 and the constantly open pressure opening 22.
  • the rim of the valve openings 23 is flanged in its collar as a whole, as can best be seen in FIG. 4. This results in a good fit for the valve balls 27, which are held by a housing part 28 which extends parallel to the control disk on its side facing away from the impeller.
  • the flanged edges of the openings 23 can be machined to form the valve seat. However, this is often not necessary.
  • the constantly open pressure opening 22 expediently has a non-flanged edge at its rear end 30 in the circumferential direction. This is to ensure that this edge has the smallest possible axial extent in order to offer the lowest possible resistance to the impacting medium.
  • the constantly open pressure opening 22 is expediently flanged.
  • this cover 32 can be produced by trough-deep drawing of the control disk material.
  • the area 31 can also be covered by a projection 34 of the housing part 28 containing the valve balls 27.
  • This housing part can also be designed and connected to the control disc 7 in such a way that it is stiffened in the area of the pressure openings 22, 23.
  • control disk shown in FIGS. 2 to 4 is arranged in the pump as shown in FIG. 1, it contains a shaft passage opening 46 with a bent edge 47 in the middle Shaft passage opening is not required if the arrangement of the connection housing 3 and the work space housing 5 is reversed in relation to the drive motor 1 compared to the arrangement of FIG. 1.
  • FIGS. 2 to 5 also applies to the embodiment according to FIGS. 6 to 7, as well as for the embodiment according to FIGS. 8 and 9, unless otherwise stated below.
  • a groove 35 is pressed in on the circumference and serves to receive a sealing ring 36 (FIG. 1) in order to effect a seal against a subsequent housing part.
  • the peripheral edge 37 of the control disk is flanged in order to thereby achieve additional stabilization.
  • the central region, which is adjacent to the hub 16 of the impeller 6, also has two opposing, quadrant-shaped, deep-drawn regions 38, the radial edges 39 and circumferential edges 40, 41 of which form beads transverse to the plane of the control disk, through which the control disc is stiffened. It goes without saying that these beads could also be arranged differently than in a quadrant-shaped distribution.
  • a circularly delimited recess 43 is provided in the central area of the control disk. Its edge 44 forms a circular bead that stiffens the control disc. In addition, this bead forms a seat for a bearing ring 45 which, in cooperation with the hub 16 of the impeller 6, forms an axial bearing for receiving the axial thrust of the impeller 6. This is primarily of interest for cases in which the impeller is displaceable in the axial direction on the Stub shaft 11 is arranged. The arrangement has the advantage that the bearing of the impeller on the bearing ring 45 clearly determines its setting relative to the control disk 7 and thus a minimal play between the impeller and the control disk.
  • the auxiliary assembly beads 49 can be provided on the outer edge, which allow a tool to be inserted between the control disk and the adjacent component in order to lift the control disk from this component.
  • FIG. 10 shows a variant of the embodiment according to FIG. 1, in which the edge of the control disk 7 is clamped flat and without any flaring between the flange 15 of the working space housing 5 and the connection housing 3. A bent edge 50 lying outside these housing parts is provided to stiffen the control disk. Likewise, a bent edge was dispensed with when connecting the control disk to the housing hub 10.
  • the embodiment according to FIG. 10 in some cases results in a simpler seal to the housing parts 3, 5 and 10.

Abstract

Liquid ring gas pump with a working space in which an impeller (6) revolves and which is bounded axially by a control plate (7) past which the impeller (6) moves with a small clearance and which has at least one intake and/or one discharge opening (21, 22, 23) and is made of rolled sheet. According to the invention, the edges (26) of the intake or discharge opening are at least in part bent over towards the side facing away from the impeller (6) and are rounded on the side facing the impeller and raised on the side facing away from it. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Flüssigkeitsringgaspumpe mit einem Arbeitsraum, in dem ein Flügelrad umläuft und der axial von einer Steuerscheibe begrenzt ist, an der das Flügelrad mit geringem Abstand vorbeistreicht und die mindestens eine Saug- und/oder Drucköffnung für den Einlaß bzw. Auslaß von Gas und Flüssigkeit in den bzw. aus dem Arbeitsraum aufweist.The invention relates to a liquid ring gas pump with a working space in which an impeller rotates and which is axially delimited by a control disk, past which the impeller passes at a short distance and which has at least one suction and / or pressure opening for the inlet or outlet of Has gas and liquid in or out of the work space.

In einer Flüssigkeitsringgaspumpe wird das zu fördernde Gas in den Zellen des Flügelrads dadurch komprimiert, daß der im Arbeitsraum exzentrisch zum Flügelrad liegende Flüssigkeitsring auf dem Weg des Gases von der Einlaßzur Auslaßöffnung von außen in das Flügelrad eindringt und dadurch das freie Zellenvolumen verkleinert. Der Wirkungsgrad hängt davon ab, daß das in einer Zelle verdichtete Gas nicht durch den Spalt zwischen Flügelrad und Steuerscheibe zur nächsten Zelle entweichen kann, in welcher ein niedrigerer Druck herrscht. Deshalb ist es einerseits erforderlich, daß das Flügelrad mit möglichst geringem Abstand an der Steuerscheibe vorbeistreicht, der im allgemeinen in der Größenordnung von einem Zehntel Millimeter liegt. Andererseits darf das Flügelrad die Scheuerscheibe nicht berühren, weil dies zu unerwünscht hohem Verschleiß und sogar zur Kaltverschweißung zwischen Flügelrad und Steuerscheibe und damit zum totalen Ausfall der Pumpe führen kann. Damit die Steuerscheiben hinreichend genau hergestellt werden können, werden sie bislang überwiegend aus gegossenem oder geschmiedetem Material mit großer Wanddicke hergestellt, was aufwendig ist. Bekannt ist es aber auch schon, eine relativ dünnwandige Edelstahlscheibe zu verwenden, die auf der dem Arbeitsraum abgewandten Seite mit einem gegossenen oder aus dickem Material ausgeschnittenen Stützkörper verschweißt wird (DE-C 36 17 344). Dies ist aber ebenfalls sehr aufwendig und rechtfertigt sich deshalb nur dann, wenn der Stützkörper aus weniger kostspieligem Material als die Edelstahldeckscheibe hergestellt werden kann.In a liquid ring gas pump, the gas to be pumped is compressed in the cells of the impeller in that the liquid ring, which is eccentric to the impeller in the working space, penetrates into the impeller on the way of the gas from the inlet to the outlet opening from the outside, thereby reducing the free cell volume. The efficiency depends on the fact that the gas compressed in one cell cannot escape through the gap between the impeller and the control disk to the next cell, in which a lower pressure prevails. Therefore, on the one hand, it is necessary for the impeller to pass the control disk as close as possible, which is generally on the order of a tenth of a millimeter. On the other hand, the impeller must not touch the scrubbing disc, because this can lead to undesirably high wear and even cold welding between the impeller and control disc and thus to the total failure of the pump. So that the control disks can be manufactured with sufficient accuracy, they have so far been predominantly made of cast or forged material with a large wall thickness, which is complex. But it is already known, a relatively thin-walled To use stainless steel disc, which is welded on the side facing away from the work area with a cast or cut out of thick material support body (DE-C 36 17 344). However, this is also very complex and is only justified if the support body can be made from less expensive material than the stainless steel cover plate.

Der Erfindung liegt die Aufgabe zugrunde, eine Steuerscheibe zu schaffen, die weniger aufwendig als die bekannten und dennoch formstabil ist.The invention has for its object to provide a control disc that is less expensive than the known, yet dimensionally stable.

Die erfindungsgemäße Lösung besteht darin, daß die aus Walzblech bestehende Steuerscheibe, die nicht mit einem besonderen Stützkörper verbunden ist, an den Rändern der Saug- bzw. Drucköffnung mindestens teilweise zu der dem Flügelrad abgewandten Seite hin umgebogen, an der dem Flügelrad zugewandten Seite gerundet und an der ihm abgewandten Seite erhaben ausgeführt ist. Diese Formgebung ermöglicht es, die Steuerscheibe aus preiswertem Walzmaterial in einem einfachen, spanlosen Verfahren zu formen. Die umgebogenen und zur dem Flügelrad abgewandten Seite hin erhaben vorstehenden Ränder der Steueröffnungen wirken sich versteifend aus, so daß die Steuerscheibe trotz ihrer geringen Materialstärke gegenüber den herrschenden Druckdifferenzen formstabil ist. Vorzugsweise werden die Öffnungen ausgestanzt, wobei der Stanzvorgang und der Bördelvorgang, der zum Umbiegen der Öffnungsränder führt, in einem Arbeitsgang vereinigt sein können. Dabei hat die Umbiegung der Öffnungsränder auch den Vorteil, daß das Material bei dieser Verformung sich nicht verzieht. Die dem Flügelrad zugewendete Stirnseite der Steuerscheibe bleibt eben und bedarf in der Regel keiner zusätzlichen Nachbearbeitung.The solution according to the invention consists in that the control disk made of rolled sheet metal, which is not connected to a special support body, at least partially bent at the edges of the suction or pressure opening to the side facing away from the impeller, rounded on the side facing the impeller and is raised on the side facing away from him. This shape makes it possible to form the control disk from inexpensive rolled material in a simple, non-cutting process. The bent and protruding edges of the control openings projecting towards the side of the impeller have a stiffening effect, so that the control disk is dimensionally stable despite the low material thickness with respect to the prevailing pressure differences. The openings are preferably punched out, the punching process and the flanging process, which leads to the bending of the opening edges, can be combined in one operation. The bending of the opening edges also has the advantage that the material does not warp during this deformation. The end face of the control disk facing the impeller remains flat and generally requires no additional post-processing.

Es ist nicht erforderlich, daß sämtliche Steueröffnungen und die vollständigen Ränder der Steueröffnungen erfindungsgemäß ausgebildet sind. Jedoch ist es vorteilhaft, wenn wenigstens die Ränder der Saugöffnung umgebördelt sind und dadurch die flügelradseitigen Kanten abgerundet sind. Hingegen kann es zweckmäßig sein, den Rand der Drucköffnung wenigstens in seinem hinten liegenden Bereich (der zuletzt von den Flügeln des Flugrads erreicht wird) nicht gebördelt und ggf. scharf auszubilden.It is not necessary that all control openings and the complete edges of the control openings are designed according to the invention. However, it is advantageous if at least the edges of the suction opening are flanged and the edges on the impeller side are thereby rounded. On the other hand, it may be expedient not to flare the edge of the pressure opening, at least in its rear area (which is last reached by the wings of the flight wheel) and, if necessary, to make it sharp.

Die Dicke des verwendeten Walzblechmaterials liegt zweckmäßigerweise nicht über 4 mm, weiter zweckmäßigerweise zwischen 2 und 3,5 mm.The thickness of the sheet metal material used is advantageously not more than 4 mm, more appropriately between 2 and 3.5 mm.

Die Rundung der Öffnungsränder auf ihrer dem Flügelrad zugewandten Seite gestattet es, günstige Ein- und Ausströmverhältnisse zu schaffen. In bestimmten Bereichen, insbesondere an dem radial außenliegenden Rand der ständig offenen Drucköffnung, kann diese Rundung mit größerem Radius als in den übrigen Randbereichen dieser Öffnung oder der Saugöffnung ausgeführt sein.The rounding of the opening edges on its side facing the impeller makes it possible to create favorable inflow and outflow conditions. In certain areas, in particular on the radially outer edge of the constantly open pressure opening, this rounding can be made with a larger radius than in the other edge areas of this opening or the suction opening.

Aus hydraulischen Gründen kann es zweckmäßig sein, den Bereich der ständig offenen Drucköffnung, der zuerst von den Flügeln des Flügelrads erreicht wird, durch eine Wand vom Druckraum abzuschirmen, die von der flügelradseitigen Oberflächenebene der Steuerscheibe abgehoben ist. Vorteilhafterweise ergibt sich dabei - vom Flügelrad her gesehen - eine taschenförmige oder muldenförmige Vertiefung, die zu dem in Umlaufrichtung weiter hinten liegenden Bereich der Drucköffnung hin offen ist. Diese Tasche oder Mulde kann leicht durch spanlose Verformung des Materials ebenso wie die Bördelung der Öffnungsränder hergestellt werden.For hydraulic reasons, it can be expedient to shield the area of the constantly open pressure opening, which is first reached by the vanes of the impeller, from the pressure chamber by a wall which is raised from the surface plane of the control disk on the impeller side. Advantageously, this results in a pocket-shaped or trough-shaped depression, as seen from the impeller, which is open toward the region of the pressure opening further back in the direction of rotation. This pocket or trough can easily be produced by non-cutting deformation of the material as well as the flanging of the opening edges.

Weist die Steuerscheibe außer der ständig offenen Drucköffnung auch noch weitere Drucköffnungen auf, die durch Ventile verschließbar sind, so können die Ventilsitze für die Ventile von dem umgebogenem Rand der Öffnungen gebildet sein. Bei einer anderen Ausführungsform der Erfindung sind diese Ventilöffnungen nicht umgebördelt oder jedenfalls nicht erhaben auf der dem Flügelrad abgewandten Seite der Steuerscheibe ausgeführt; stattdessen ist die Steuerscheibe in dem entsprechenden Bereich an der dem Flügelrad abgekehrten Seite mit einem besonderen Ventilgehäuse steif und fest verbunden, das die Ventilsitze bildet und in diesem Bereich der Steuerscheibe zusätzlich Steifigkeit und Formstabilität verleiht. Dabei kann der das Ventilgehäuse bildende Bauteil auch zur Bildung der oben erwähnten Abdeckung des Bereichs der ständig offenen Auslaßöffnung herangezogen werden, der zuerst von den Radflügeln erreicht wird. Zu diesem Zweck erhält dieser Bauteil eine Verlängerung, einen Vorsprung oder eine Zunge, die sich teilweise über die ständig offene Drucköffnung erstreckt.If, in addition to the constantly open pressure opening, the control disk also has other pressure openings which can be closed by valves, the valve seats for the valves can be formed by the bent edge of the openings. In another embodiment of the invention, these valve openings are not flanged or in any case not raised on the side of the control disk facing away from the impeller; instead, the control disk in the corresponding area on the side facing away from the impeller is rigidly and firmly connected to a special valve housing which forms the valve seats and in this area also gives the control disk rigidity and dimensional stability. The component forming the valve housing can also be used to form the above-mentioned covering of the region of the constantly open outlet opening which is first reached by the wheel vanes. For this purpose, this component receives an extension, a projection or a tongue, which extends partially over the constantly open pressure opening.

Zur Versteifung der Steuerscheibe im Außenbereich kann deren Außenrand umgebördelt sein.The outer edge of the control disk can be flanged to stiffen it.

Auch im radial inneren Bereich der Steuerscheibe gibt es die Möglichkeit, die Formstabilität und Steifheit durch Verformung zur verbessern. Zweckmäßigerweise werden im Bereich der Nabe des Flügelrads Sicken eingebracht, die vorzugsweise radial verlaufen oder radial verlaufende Biegekanten umfassen. Auch der Rand einer etwaigen Wellendurchtrittsbohrung kann umgebogen und einseitig erhaben ausgeführt sein. Der umgebogene Rand kann auch zur Aufnahme einer Lagerbuchse genutzt werden, die beispielsweise eingepreßt wird. Eine solche Lagerbuchse kann dann zweckmäßig sein, wenn vorgesehen ist, daß sich die Nabe des Flügelrads an der Steuerscheibe über ein Axiallager abstützt. Dies ist auch deshalb zweckmäßig, weil dadurch das Spiel zwischen der Steuerscheibe und den Flügeln des Flügelrads in der gewünschten Größe festgelegt werden kann.In the radially inner area of the control disc there is also the possibility of improving the dimensional stability and rigidity through deformation. Appropriately, beads are introduced in the area of the hub of the impeller, which preferably extend radially or comprise radially extending bending edges. The edge of any shaft passage bore can also be bent and raised on one side. The bent edge can also be used to hold a bearing bush, which is pressed in, for example. Such a bearing bush can be useful if it is provided that the hub of the impeller is supported on the control disk via an axial bearing. This is also useful because it allows the game between the control disc and the vanes of the impeller to be set in the desired size.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die vorteilhafte Ausführungsbeispiele veranschaulicht. Es zeigen:

Fig.1
einen schematischen Längsschnitt durch
eine erfindungsgemäße Pumpe,
Fig.2
eine Axialansicht einer ersten Ausführungsform
einer Steuerscheibe,
Fig.3
einen Schnitt längs Linie C-D der Fig.2,
Fig.4
einen Teilschnitt gemäß Linie A-B der Fig.2,
Fig.5
einen Teilschnitt ähnlich Fig.4 durch
eine andere Ausführungsform,
Fig.6
die Axialansicht einer zweiten Ausführungsform
einer Steuerscheibe,
Fig.7
einen Schnitt gemäß Linie E-F der Fig.6,
Fig.8
eine Axialansicht einer dritten Ausführungsform
der Steuerscheibe,
Fig.9
einen Schnitt gemäß Linie G-H der Fig.8 und
Fig. 10
einen der Fig. 1 entsprechenden Teil-Längsschnitt durch eine weitere Ausführungsform.
The invention is explained in more detail below with reference to the drawing which illustrates advantageous exemplary embodiments. Show it:
Fig. 1
a schematic longitudinal section through
a pump according to the invention,
Fig. 2
an axial view of a first embodiment
a control disc,
Fig. 3
2 shows a section along line CD of FIG. 2,
Fig. 4
a partial section along line AB of Figure 2,
Fig. 5
a partial section similar to Figure 4
another embodiment,
Fig. 6
the axial view of a second embodiment
a control disc,
Fig. 7
6 shows a section along line EF of FIG. 6,
Fig. 8
an axial view of a third embodiment
the control disc,
Fig. 9
a section along line GH of Figure 8 and
Fig. 10
a partial longitudinal section corresponding to FIG. 1 through a further embodiment.

Die von einem Antriebsmotor 1 angetriebene und getragene Flüssigkeitsringgaspumpe 2 umfaßt einen Gehäuseteil 3, der die Saug- und Druckanschlüsse bildet, von denen einer bei 4 erkennbar ist und der deshalb hier als Anschlußgehäuse bezeichnet wird. Sie umfaßt ferner ein Arbeitsraumgehäuse 5, in welchem das Flügelrad 6 umläuft, und eine zwischen Anschlußgehäuse 3 und Arbeitsraumgehäuse 5 angeordnete Steuerscheibe 7.The liquid ring gas pump 2, which is driven and carried by a drive motor 1, comprises a housing part 3 which forms the suction and pressure connections, one of which can be seen at 4 and which is therefore referred to here as the connection housing. It also includes a working space housing 5, in which the impeller 6 rotates, and a control disk 7 arranged between the connection housing 3 and the working space housing 5.

Das Anschlußgehäuse 3 weist einen Flansch 8 auf, der mit dem Motorflansch 9 verbunden ist, sowie eine Gehäusenabe 10, die eine den Wellenstumpf 11 des Motors 1 abdichtende Gleitringdichtung 12 umschließt. Das Anschlußgehäuse 3 bildet ferner einen äußeren Gehäusemantel 13, aus dem die Anschlußstutzen 4 vorspringen und dessen ebene Stirnfläche 14 unter Einschluß der Steuerscheibe 7 mit dem Flansch 15 des Arbeitsraumgehäuses 5 verschraubt ist.The connection housing 3 has a flange 8, which is connected to the motor flange 9, and a housing hub 10, which surrounds a mechanical seal 12 which seals the stub shaft 11 of the motor 1. The connection housing 3 also forms an outer housing jacket 13, from which the connection piece 4 projects and whose flat end face 14 is screwed to the flange 15 of the working space housing 5, including the control disk 7.

Der Wellenstumpf 11 des Motors 1 trägt die Nabe 16 des Flügelrads 6, dessen axiale Lage auf dem Wellenstumpf 11 mittels einer bekannten Justiereinrichtung 17 einstellbar ist. Die Flügel des Laufrads 6 sind auf der dem Motor 1 abgewandten Seite durch eine Scheibe 18 miteinander verbunden, die die zwischen den Flügeln des Flügelrads gebildeten Zellen auf dieser Seite im wesentlichen abschließt. Auf der anderen Seite sind die Flügelradzellen offen zur Steuerscheibe 7, so daß in bekannter Weise das zu fördernde Gas und Betriebsflüssigkeit durch die in der Steuerscheibe 7 vorgesehene Saugöffnung in die Flügelradzellen einströmen und durch die Drucköffnung wieder ausströmen kann.The stub shaft 11 of the motor 1 carries the hub 16 of the impeller 6, the axial position of which on the stub shaft 11 can be adjusted by means of a known adjusting device 17. The blades of the impeller 6 are connected to one another on the side facing away from the motor 1 by a disk 18 which essentially seals off the cells formed between the blades of the impeller on this side. On the other hand, the impeller cells are open to the control disk 7, so that in a known manner the gas and operating fluid to be conveyed can flow into the impeller cells through the suction opening provided in the control disk 7 and can flow out again through the pressure opening.

Die Steuerscheibe hat im wesentlichen kreisscheibenförmige Gestalt, ggf. mit einigen radialen Befestigungsvorsprüngen 20 am Umfang. Die Saugöffnung 21, die ständig offene Drucköffnung 22 und die durch Ventile verschließbaren Drucköffnungen 23 sind an üblicher Stelle darin angeordnet. Ferner kann eine Betriebsflüssigkeitszuführungsöffnung 24 an geeigneter Stelle vorgesehen sein, deren Rand zweckmäßigerweise gleichfalls umgebördelt ist.The control disk has an essentially circular disk shape, possibly with a few radial fastening projections 20 on the circumference. The suction opening 21, the constantly open pressure opening 22 and the pressure openings 23 which can be closed by valves are arranged in the usual place therein. Furthermore, an operating fluid supply opening 24 can be provided at a suitable point, the edge of which is also advantageously flanged.

Erfindungsgemäß besteht sie aus einem Metallwalzblech solcher Dicke, daß sie einem spanlosen Umformprozeß unterworfen werden kann, in welchem sie ausgeschnitten, ihre Öffnungen ausgestanzt und die beteiligten Ränder in bestimmter Weise umgebogen werden. Die Dicke sollte zu diesem Zweck nicht über 4 mm liegen. Bewährt hat sich eine Dicke von etwa 3 mm bis hinauf zu einem Arbeitsraumdurchmesser von etwa 300 mm.According to the invention, it consists of a sheet metal sheet of such thickness that it can be subjected to a non-cutting forming process in which it is cut out, its openings are punched out and the edges involved are bent in a certain manner. The thickness should not be used for this purpose over 4 mm. A thickness of approximately 3 mm up to a working area diameter of approximately 300 mm has proven effective.

Der gesamte, umlaufende Rand 26 der Saugöffnung 21 ist umgebördelt, so daß er zum Arbeitsraum hin abgerundet ist, während der umgebördelte Randteil zu der anderen Seite hin erhaben vorsteht. Dadurch ergibt sich eine strömungsgünstige Führung des in den Arbeitsraum einströmenden Mediums. Die Drucköffnung setzt sich aus mehreren Einzelöffnungen zusammen, nämlich den mittels Ventilkugeln 27 schließbaren Öffnungen 23 und der ständig offenen Drucköffnung 22. Der Rand der Ventilöffnungen 23 ist in seiner Gesamtheit kragenförmig umgebördelt, wie man am besten in Fig. 4 erkennt. Dadurch ergibt sich ein guter Sitz für die Ventilkugeln 27, die von einem Gehäuseteil 28 gehalten sind, der sich parallel zur Steuerscheibe auf deren dem Flügelrad abgewandten Seite erstreckt. Zur Bildung des Ventilsitzes können die umgebördelten Ränder der Öffnungen 23 bearbeitet werden. Dies ist jedoch oft nicht erforderlich.The entire circumferential edge 26 of the suction opening 21 is flanged, so that it is rounded towards the work area, while the flanged edge part protrudes towards the other side. This results in a flow-favorable guidance of the medium flowing into the work space. The pressure opening is composed of a plurality of individual openings, namely the openings 23 which can be closed by means of valve balls 27 and the constantly open pressure opening 22. The rim of the valve openings 23 is flanged in its collar as a whole, as can best be seen in FIG. 4. This results in a good fit for the valve balls 27, which are held by a housing part 28 which extends parallel to the control disk on its side facing away from the impeller. The flanged edges of the openings 23 can be machined to form the valve seat. However, this is often not necessary.

Die ständig offene Drucköffnung 22 weist an ihrem in Umlaufrichtung hinten liegenden Ende 30 zweckmäßigerweise eine nicht gebördelte Kante auf. Dadurch soll erreicht werden, daß diese Kante eine möglichst geringe axiale Erstreckung hat, um dem dagegenprallenden Medium möglichst geringen Widerstand zu bieten. An ihrem radial innen und radial außen liegenden Randabschnitten ist die ständig offene Drucköffnung 22 zweckmäßigerweise umgebördelt. In ihrem in Umlaufrichtung vorne liegenden Abschnitt, der also von den Flügeln des Flügelrads zuerst überstrichen wird, weist sie auf der dem Flügelrad abgewendeten Seite zweckmäßigerweise eine Abdeckung auf. Wie man am besten in Fig. 4 erkennt, kann diese Abdeckung 32 durch muldenförmiges Tiefziehen des Steuerscheibenmaterials hergestellt werden. Wie in Fig. 5 angedeutet, kann die Abdeckung des Bereichs 31 aber auch durch einen Vorsprung 34 des die Ventilkugeln 27 enthaltenden Gehäuseteils 28 erfolgen. Dieser Gehäuseteil kann zudem in solcher Weise ausgeführt und mit der Steuerscheibe 7 verbunden werden, daß diese in dem Bereich der Drucköffnungen 22, 23 dadurch versteift wird.The constantly open pressure opening 22 expediently has a non-flanged edge at its rear end 30 in the circumferential direction. This is to ensure that this edge has the smallest possible axial extent in order to offer the lowest possible resistance to the impacting medium. At its radially inner and radially outer edge sections, the constantly open pressure opening 22 is expediently flanged. In its section lying at the front in the circumferential direction, which is therefore first swept by the vanes of the impeller, it expediently has a cover on the side facing away from the impeller. As can best be seen in FIG. 4, this cover 32 can be produced by trough-deep drawing of the control disk material. As indicated in FIG. 5, the area 31 can also be covered by a projection 34 of the housing part 28 containing the valve balls 27. This housing part can also be designed and connected to the control disc 7 in such a way that it is stiffened in the area of the pressure openings 22, 23.

Wenn die in Fig. 2 bis 4 dargestellte Steuerscheibe in der Pumpe so angeordnet ist, wie dies in Fig. 1 gezeigt ist, enthält sie in der Mitte eine Wellendurchtrittsöffnung 46 mit umgebogenem Rand 47. Eine solche Wellendurchtrittsöffnung ist nicht erforderlich, wenn die Anordnung des Anschlußgehäuses 3 und des Arbeitsraumgehäuses 5 im Verhältnis zum Antriebsmotor 1 gegenüber der Anordnung von Fig. 1 umgekehrt ist.If the control disk shown in FIGS. 2 to 4 is arranged in the pump as shown in FIG. 1, it contains a shaft passage opening 46 with a bent edge 47 in the middle Shaft passage opening is not required if the arrangement of the connection housing 3 and the work space housing 5 is reversed in relation to the drive motor 1 compared to the arrangement of FIG. 1.

Die obige Erläuterung zu Fig. 2 bis 5 gilt auch für die Ausführung gemäß Fig. 6 bis 7, sowie für die Ausführung gemäß Fig. 8 und 9, soweit im folgenden nicht anders angegeben.The above explanation for FIGS. 2 to 5 also applies to the embodiment according to FIGS. 6 to 7, as well as for the embodiment according to FIGS. 8 and 9, unless otherwise stated below.

In der Ausführung gemäß Fig. 6 und 7 ist am Umfang eine Nut 35 eingedrückt, die zur Aufnahme eines Dichtrings 36 (Fig. 1) dient, um eine Abdichtung gegenüber einem anschließenden Gehäuseteil zu bewirken. Ferner ist der Umfangsrand 37 der Steuerscheibe umgebördelt, um dadurch eine zusätzliche Stabilisierung zu erzielen. Schließlich weist auch der Zentralbereich, der der Nabe 16 des Flügelrads 6 benachbart ist, zwei einander gegenüberliegende, quadrantenförmige, tiefgezogene Bereiche 38 auf, deren radiale Ränder 39 und in Umfangsrichtung verlaufende Ränder 40, 41 quer zur Ebene der Steuerscheibe verlaufenden Sicken bilden, durch die die Steuerscheibe versteift wird. Es versteht sich, daß diese Sicken auch anders als in quadrantenförmiger Verteilung angeordnet werden könnten.In the embodiment according to FIGS. 6 and 7, a groove 35 is pressed in on the circumference and serves to receive a sealing ring 36 (FIG. 1) in order to effect a seal against a subsequent housing part. Furthermore, the peripheral edge 37 of the control disk is flanged in order to thereby achieve additional stabilization. Finally, the central region, which is adjacent to the hub 16 of the impeller 6, also has two opposing, quadrant-shaped, deep-drawn regions 38, the radial edges 39 and circumferential edges 40, 41 of which form beads transverse to the plane of the control disk, through which the control disc is stiffened. It goes without saying that these beads could also be arranged differently than in a quadrant-shaped distribution.

In der Ausführung gemäß Fig. 8 und 9 ist in dem Zentral bereich der Steuerscheibe eine kreisförmig begrenzte Vertiefung 43 vorgesehen. Ihr Rand 44 bildet eine kreisförmige Sicke, die die Steuerscheibe versteift. Außerdem bildet diese Sicke einen Sitz für einen Lagerring 45, der im Zusammenwirken mit der Nabe 16 des Flügelrads 6 ein Axiallager bildet zur Aufnahme des Axialschubs des Flügelrads 6. Dies ist vornehmlich für solche Fälle von Interesse, in denen das Flügelrad in Axialrichtung verschiebbar auf dem Wellenstumpf 11 angeordnet ist. Die Anordnung hat den Vorteil, daß die Anlage des Flügelrads an dem Lagerring 45 eindeutig dessen Einstellung gegenüber der Steuerscheibe 7 und damit ein minimal es Spiel zwischen Flügelrad und Steuerscheibe bestimmt.8 and 9, a circularly delimited recess 43 is provided in the central area of the control disk. Its edge 44 forms a circular bead that stiffens the control disc. In addition, this bead forms a seat for a bearing ring 45 which, in cooperation with the hub 16 of the impeller 6, forms an axial bearing for receiving the axial thrust of the impeller 6. This is primarily of interest for cases in which the impeller is displaceable in the axial direction on the Stub shaft 11 is arranged. The arrangement has the advantage that the bearing of the impeller on the bearing ring 45 clearly determines its setting relative to the control disk 7 and thus a minimal play between the impeller and the control disk.

Am Außenrand können die Montage-Hilfssicken 49 vorgesehen sein, die es gestatten, ein Werkzeug zwischen Steuerscheibe und angrenzendes Bauteil einzusetzen, um die Stuerscheibe von diesem Bauteil abzuheben.The auxiliary assembly beads 49 can be provided on the outer edge, which allow a tool to be inserted between the control disk and the adjacent component in order to lift the control disk from this component.

Fig. 10 zeigt eine Variante der Ausführung gemäß Fig. 1, bei der der Rand der Steuerscheibe 7 flach und ohne Bördelung zwischen dem Flansch 15 des Arbeitsraumgehäuses 5 und dem Anschlußgehäuse 3 dicht eingespannt ist. Zur Versteifung der Steuerscheibe ist ein außerhalb dieser Gehäuseteile liegender, umgebogener Rand 50 vorgesehen. Ebenso wurde bei dem Anschluß der Steuerscheibe an die Gehäusenabe 10 auf einen umgebogenen Rand verzichtet. Die Ausführung gemäß Fig. 10 ergibt in manchen Fällen eine einfachere Abdichtung zu den Gehäuseteilen 3, 5 und 10 hin.FIG. 10 shows a variant of the embodiment according to FIG. 1, in which the edge of the control disk 7 is clamped flat and without any flaring between the flange 15 of the working space housing 5 and the connection housing 3. A bent edge 50 lying outside these housing parts is provided to stiffen the control disk. Likewise, a bent edge was dispensed with when connecting the control disk to the housing hub 10. The embodiment according to FIG. 10 in some cases results in a simpler seal to the housing parts 3, 5 and 10.

Claims (15)

Flüssigkeitsringgaspumpe mit einem Arbeitsraum, in dem ein Flügelrad (6) umläuft und der axial von einer Steuerscheibe (7) begrenzt ist, an der das Flügelrad (6) mit geringem Abstand vorbeistreicht und die mindestens eine Saug- und/oder eine Drucköffnung (21, 22, 23) aufweist und aus Walzblech besteht, dadurch gekennzeichnet, daß die Ränder (26) der Saug- bzw. Drucköffnung zu der dem Flügelrad (6) abgewandten Seite hin zumindest teilweise umgebogen und an der dem Flügelrad zugewandten Seite gerundet und an der ihm abgewandten Seite erhaben ausgeführt sind.Liquid ring gas pump with a working space in which an impeller (6) rotates and which is axially delimited by a control disk (7), past which the impeller (6) passes at a short distance and which has at least one suction and / or pressure opening (21, 22, 23) and consists of rolled sheet metal, characterized in that the edges (26) of the suction or pressure opening are at least partially bent toward the side facing away from the impeller (6) and rounded on the side facing the impeller and on the side facing it facing side are raised. Flüssigkeitsringgaspumpe nach Anspruch 1, dadurch gekennzeichnet, daß das die Steuerscheibe bildende Walzblech nicht mehr als 4 mm dick ist.Liquid ring gas pump according to claim 1, characterized in that the rolled plate forming the control disk is not more than 4 mm thick. Flüssigkeitsringgaspumpe nach Anspruch 2, dadurch gekennzeichnet, daß das die Steuerscheibe bildende Walzblech etwa 2,5 bis 3,5 mm dick ist.Liquid ring gas pump according to claim 2, characterized in that the rolled plate forming the control disk is approximately 2.5 to 3.5 mm thick. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die ständig offene Drucköffnung (22) an derjenigen Öffnungsseite (31), die von den Flügeln des Flügelrads (6) zuerst erreicht wird, mit einem die Öffnung auf der vom Flügelrad (6) abgewandten Seite teilweise abdeckenden, abgebogenen Teil (32) aufweist.Liquid ring gas pump according to one of claims 1 to 3, characterized in that the constantly open pressure opening (22) on that opening side (31) which is reached first by the vanes of the impeller (6) has an opening on that of the impeller (6 ) facing away from partially covered, bent part (32). Flüssigkeitsringgaspumpe nach Anspruch 4, dadurch gekennzeichnet, daß der abgebogene Teil (32) gegenüber dem Arbeitsraum eine Mulde bildet.Liquid ring gas pump according to claim 4, characterized in that the bent part (32) forms a trough with respect to the working space. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Steuerscheibe (7) eine oder mehrere mit Ventilelementen (27) zusammenwirkende Drucköffnungen (23) enthält, wobei der Ventilsitz für die Ventilelemente (27) jeweils von dem umgebogenen Rand der Drucköffnungen (23) gebildet ist.Liquid ring gas pump according to one of Claims 1 to 5, characterized in that the control disk (7) contains one or more pressure openings (23) which cooperate with valve elements (27), the valve seat for the valve elements (27) in each case from the bent edge of the pressure openings ( 23) is formed. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Steuerscheibe (7) zusätzlich zu der ständig offenen Drucköffnung (22) eine oder mehrere mit Ventilelementen (27) zusammenwirkende Drucköffnungen (23) enthält, wobei der Ventilsitz für die Ventilelemente (27) von einem mit der Steuerscheibe im Bereich dieser Öffnungen (23) aufgesetzten, die Steuerscheibe versteifenden Bauteil (28) gebildet ist.Liquid ring gas pump according to one of claims 1 to 6, characterized in that the control disk (7) contains, in addition to the constantly open pressure opening (22), one or more pressure openings (23) interacting with valve elements (27), the valve seat for the valve elements (27 ) is formed by a component (28) stiffening the control disc in the area of these openings (23) and stiffening the control disc. Flüssigkeitsringgaspumpe nach Anspruch 7, dadurch gekennzeichnet, daß der Bauteil (28) einen Vorsprung (24) besitzt, der sich in Abstand von dem Flügelrad (6) über den Bereich (31) der ständig offenen Drucköffnung (22) erstreckt, der von den Flügeln des Flügelrads zuerst erreicht wird.Liquid ring gas pump according to Claim 7, characterized in that the component (28) has a projection (24) which extends at a distance from the impeller (6) over the region (31) of the constantly open pressure opening (22) which extends from the vanes of the impeller is reached first. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß in demjenigen Umfangsbereich der Steuerscheibe (7) der mit einem anschließenden Gehäuseteil (4, 5) zusammenwirkt, eine Nut (35) zur Aufnahme eines O-Rings (36) eingedrückt ist.Liquid ring gas pump according to one of claims 1 to 8, characterized in that a groove (35) for receiving an O-ring (36) is pressed into that peripheral region of the control disk (7) which interacts with a subsequent housing part (4, 5). Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Außenrand (37) der Steuerscheibe (7) umgebördelt ist.Liquid ring gas pump according to one of claims 1 to 9, characterized in that the outer edge (37) of the control disk (7) is flanged. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Steuerscheibe (7) in dem Bereich, der der Flügelradnabe (16) benachbart ist, aussteifende Sicken (39, 40, 41, 44) aufweist.Liquid ring gas pump according to one of Claims 1 to 10, characterized in that the control disk (7) has stiffening beads (39, 40, 41, 44) in the region which is adjacent to the impeller hub (16). Flüssigkeitsringgaspumpe nach Anspruch 11, dadurch gekennzeichnet, daß die Sicken (39) radialen Verlauf haben.Liquid ring gas pump according to claim 11, characterized in that the beads (39) have a radial course. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Steuerscheibe (7) eine Bohrung (46) für den Wellendurchtritt aufweist, deren Rand (47) umgebogen und einseitig erhaben ist.Liquid ring gas pump according to one of claims 1 to 12, characterized in that the control disc (7) has a bore (46) for the shaft passage, the edge (47) of which is bent and raised on one side. Flüssigkeitsringgaspumpe nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß die Steuerscheibe (7) benachbart der Flügelradnabe (16) eine kreisförmige Sicke (44) als Sitz für einen Lagerring (45) aufweist.Liquid ring gas pump according to one of claims 1 to 13, characterized in that the control disc (7) adjacent to the impeller hub (16) has a circular bead (44) as a seat for a bearing ring (45). Verfahren zum Herstellen einer Steuerscheibe nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß sie aus Walzblech spanlos geformt wird.Method for producing a control disk according to one of Claims 1 to 14, characterized in that it is formed from rolled sheet metal without cutting.
EP94114305A 1993-09-23 1994-09-12 Liquid ring gas pump Expired - Lifetime EP0645521B1 (en)

Applications Claiming Priority (2)

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DE4332275 1993-09-23
DE4332275A DE4332275A1 (en) 1993-09-23 1993-09-23 Control disc for a liquid ring gas pump

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EP0645521B1 EP0645521B1 (en) 1996-12-11

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JP (1) JP3538235B2 (en)
AT (1) ATE146256T1 (en)
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DE19812976C2 (en) * 1998-03-24 2000-05-04 Siemens Ag Liquid ring compressor
WO1999063230A1 (en) * 1998-05-29 1999-12-09 Siemens Aktiengesellschaft Liquid ring pump
DE10121800C1 (en) * 2001-05-04 2002-08-22 Siemens Ag Liquid ring pump and control disc for a liquid ring pump

Also Published As

Publication number Publication date
JPH07151085A (en) 1995-06-13
DK0645521T3 (en) 1997-06-02
CZ290611B6 (en) 2002-09-11
DE4332275A1 (en) 1995-03-30
ES2096390T3 (en) 1997-03-01
CZ233894A3 (en) 1995-04-12
DE59401258D1 (en) 1997-01-23
GR3022489T3 (en) 1997-05-31
ATE146256T1 (en) 1996-12-15
EP0645521B1 (en) 1996-12-11
JP3538235B2 (en) 2004-06-14
US5489195A (en) 1996-02-06

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