EP0893601B1 - Combination of a piston pump with a booster pump - Google Patents

Combination of a piston pump with a booster pump Download PDF

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Publication number
EP0893601B1
EP0893601B1 EP98111868A EP98111868A EP0893601B1 EP 0893601 B1 EP0893601 B1 EP 0893601B1 EP 98111868 A EP98111868 A EP 98111868A EP 98111868 A EP98111868 A EP 98111868A EP 0893601 B1 EP0893601 B1 EP 0893601B1
Authority
EP
European Patent Office
Prior art keywords
pump
housing
piston
booster
booster 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
Application number
EP98111868A
Other languages
German (de)
French (fr)
Other versions
EP0893601A3 (en
EP0893601A2 (en
Inventor
Roland Nuber
Hans Götz
Verena Dettinger-Müller
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.)
URACA PUMPENFABRIK GmbH and Co KG
Original Assignee
URACA PUMPENFABRIK GmbH and Co KG
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Publication of EP0893601A2 publication Critical patent/EP0893601A2/en
Publication of EP0893601A3 publication Critical patent/EP0893601A3/en
Application granted granted Critical
Publication of EP0893601B1 publication Critical patent/EP0893601B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/12Combinations of two or more pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • F04B23/04Combinations of two or more pumps
    • F04B23/08Combinations of two or more pumps the pumps being of different types
    • F04B23/10Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • F04B23/04Combinations of two or more pumps
    • F04B23/08Combinations of two or more pumps the pumps being of different types
    • F04B23/14Combinations of two or more pumps the pumps being of different types at least one pump being of the non-positive-displacement type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44Fluid-guiding means, e.g. diffusers
    • F04D29/46Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/48Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps
    • F04D29/486Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/62Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a pump arrangement with a plunger or piston pump and with a charging or booster pump, as indicated in the preamble of claim 1.
  • Piston pumps are usually used for pumping of liquids, especially hydraulic liquids, used, with this type of pump particularly high Pressures are achievable.
  • Piston pumps are known, the Housing are designed so that they are in different Installation positions can be installed in a functional manner. Also are Piston pumps are known in which the drive mechanism of the Piston or the plunger formed so far symmetrical is that the piston pump in both directions of rotation of its drive shaft works fully functional.
  • a charge or booster pump for the piston pump which the suction-side liquid of the piston pump with Pressurized so that the suction-side valves of the piston pump are preloaded in their open position and the Liquid of the suction movement of the plunger or the piston can follow without risk of cavitation.
  • the piston pump works hydrostatically to achieve a high final pressure
  • the booster pump can work hydrodynamically, which results in although a significantly lower one to avoid the Cavitation can achieve sufficient pre-pressure. Doing so a flow pump is usually used as a booster pump, where the conveying capacity by rotating one with profiled blades provided impeller is achieved.
  • the present invention addresses the problem a pump arrangement of the type mentioned with simple constructive measures to the effect that when installing or connecting the drive shaft has an increased variability.
  • the invention is based on the general idea for the pump arrangement one in both directions of rotation of the drive shaft functional piston pump with a booster pump to combine, which are also generally suitable is in both directions of rotation of the drive shaft in to be sufficiently functional. Since it is one Pump used as a booster pump is not achieving a high pressure difference arrives and generally on the drive side a high excess of power is available stands, such a booster pump does not need an efficient To show efficiency. In view of this finding can therefore in the pump arrangement according to the invention Pumps are also used as booster pumps that for common applications, e.g. because of their poor efficiency, not acceptable.
  • the pump wheel of the charge or booster pump arranged in a flow-optimized deflection section, the one direction of rotation of the pump wheel to maintain a high efficiency preferred. Because of the training this deflection section as a separate component can do this disassembled relatively easily and reassembled laterally become. In this way, the preferred one is reversed Direction of rotation. This simple, to adapt the invention Pump arrangement to the local conditions, especially with stationary, permanently installed pump arrangements, assembly process to be carried out only once a high efficiency of the booster pump and thus also the pump arrangement.
  • a turning of the deflection section can be carried out in a particularly simple manner.
  • the attachment of the deflection section effect simultaneously with the attachment of the cover, the deflection section being exclusively by a Braced between the lid and the base plate attached becomes. This way, there is no need for separate fasteners be provided for the deflection section.
  • Pump arrangement can do this with the features of claim 4 be equipped.
  • Such a timing belt is characterized by a long service life and a short one Maintenance needs.
  • Another advantageous embodiment has the features of claim 5. This measure causes when the Booster pump housing a centering or positioning of the booster pump housing compared to the piston pump housing and enables a defined position of the shaft for the pump wheel and this e.g. driving over the timing belt common drive shaft for the pumps, which are usually is also mounted on the piston pump housing. So less have to Tolerances in the manufacture of the individual parts observed become.
  • FIG. 1 shows a pump arrangement according to the invention a plunger or piston pump 1 with a piston pump housing 2 on.
  • the piston pump 1 of the embodiment is intended for horizontal installation, i.e. you not Piston or plunger shown works in a horizontal trending level.
  • connection flanges 3 and 4 are provided for fastening the pump arrangement are on the lower side of the piston pump housing corresponding to FIG. 1 2 connection flanges 3 and 4 are provided.
  • the Pump arrangement or the piston pump housing 2 is in the embodiment designed so that the pump assembly without more effort both on their back and on its abdominal side is mountable.
  • the connecting flange 4 at the location of the piston pump housing 2 mounted, on the in Fig. 1 still a lifting eye 5 is attached.
  • the remaining connection and fastening means the piston pump housing 2 or the pump arrangement are in a corresponding manner on the opposite Side attachable or already exist twice.
  • a charging or booster pump 6 with a booster pump housing 7 arranged on the side of the piston pump housing shown in Fig. 1 2 is a charging or booster pump 6 with a booster pump housing 7 arranged.
  • the booster pump housing 7 is closed with a disc-shaped cover 8, the with Screws 9 is attached to the booster pump housing 7.
  • a suction opening 10 in the middle of the booster pump 6 provided with a feed line, not shown for the liquid to be pumped by the pump arrangement communicated.
  • the pump wheel 11 is a radial pump wheel trained and has straight, radially extending Buckets 13, which increases the delivery rate of the pump wheel 11 is the same size in both directions of rotation of the shaft 12.
  • the pump wheel 11 or its blades 13 rotate in one Interior 14, which is referred to as a deflection section Section 15 of the booster pump housing 7 is formed.
  • the interior 14 is in the deflection section 15 designed so that the radial distance between the Outer circumference of the pump wheel 11 and the inside of the deflection section 15 spirally expanded to one on the pressure side Outlet opening 16 of the booster pump 6.
  • This outlet opening 16 in turn communicates with the suction side connected to the piston pump 1.
  • This special shape of the interior 14 in which the impeller 11 with its Blades 13 rotates, causing the delivery rate of the Pump wheel 11 is optimized in one direction of rotation. This preferred direction of rotation corresponds to the direction in which the Distance between the circumference of the impeller 11 and the inside of the deflection section 15 increases.
  • the deflection section 15 is designed as a separate component, that can be removed and reassembled.
  • the deflection section 15 is in which the deflection section in Fig. 3 cut at least with regard to the contour of its interior 14 mirror-symmetrical. This configuration causes that when turning the deflection section 15 by 180 ° with respect a mirror axis 17 lying in the plane of symmetry an inner contour mirrored on this mirror axis 17 results.
  • the radial Gap between the outer circumference of the impeller 11 and the Inner contour of the deflection section 15 smaller clockwise is, he takes the turned deflection section 15 in Clockwise to.
  • the deflection section 15 is corresponding 2 through the cover 8 on the booster pump housing 7 attached.
  • the deflection section 15 is between one Base plate 19 and the cover 8 using the screws 9 braced.
  • the seal between the deflection section 15 and the base plate 19 and the cover 8 are each with an axially acting seal 20 causes, for example consists of a sealing ring or a sealing cord that is inserted into a corresponding groove.
  • the shaft 12, to which the pump wheel 11 is attached has at its area facing away from the impeller 11, two bearings 21 and 22 on. While the bearing 21 is completely in the booster pump housing 7 is positioned, the other is at the end of the shaft 12 mounted bearings 22 partially in the booster pump housing 7 and partly in the piston pump housing 2 kept positioned. For this purpose is in the piston pump housing 2 a corresponding recess 23 is provided.
  • This special mounting of the shaft 12 causes a defined position the shaft 12 with respect to a drive shaft driving this 24, which is also positioned on the piston pump housing 2 is stored.
  • the shaft 12 is driven via a toothed belt 25, which is attached to the shaft 12 Gear and a gear attached to the drive shaft 24 connects power-transmitting with each other.
  • the positioning of the bearing 22 in the piston pump housing 2 also causes the booster pump housing to be centered 7, during its attachment to the piston pump housing 2. Also is the booster pump housing 7 via the bearing 22 in addition supported on the piston pump housing 2. simultaneously can the booster pump housing 7 by this measure on this Side be open, it is only at his Assembly on the piston pump housing 2 is closed. there advantageously results in a more compact design for the pump arrangement according to the invention.
  • a piston pump 1 discontinuously the liquid to be pumped promotes, it can on the suction side of the piston pump 1 come to the formation of vibrations. Such vibrations lead to considerable stress on the lines and other pump parts on the suction side of piston pump 1 and thus also loads on the booster pump 6. In addition this also increases the risk of cavitation.
  • a vibration damping device can in the pump arrangement according to the invention between the suction side of the piston pump 1 and the pressure side of the Booster pump 6 arranged a vibration damping device become.
  • a vibration or pulsation damping device is for example in DE 42 40 590 A1 described. This damping device is preferably in the Piston pump housing 2 integrated, so that no additional Components are to be assembled.

Description

Die Erfindung betrifft eine Pumpenanordnung mit einer Plunger- bzw. Kolbenpumpe und mit einer Lade- bzw. Boosterpumpe, wie es im Oberbegriff des Anspruches 1 angegeben ist.The invention relates to a pump arrangement with a plunger or piston pump and with a charging or booster pump, as indicated in the preamble of claim 1.

Plunger- bzw. Kolbenpumpen werden üblicherweise zum Fördern von Flüssigkeiten, insbesondere von hydraulischen Flüssigkeiten, verwendet, wobei mit diesem Pumpentyp besonders hohe Drücke erzielbar sind. Es sind Kolbenpumpen bekannt, deren Gehäuse derart ausgestaltet sind, daß sie in verschiedenen Einbaulagen funktionsfähig montierbar sind. Außerdem sind Kolbenpumpen bekannt, bei denen die Antriebsmechanik des Kolbens bzw. des Plungers soweit symmetrisch ausgebildet ist, daß die Kolbenpumpe in beiden Drehrichtungen ihrer Antriebswelle voll funktionsfähig arbeitet.Plunger or piston pumps are usually used for pumping of liquids, especially hydraulic liquids, used, with this type of pump particularly high Pressures are achievable. Piston pumps are known, the Housing are designed so that they are in different Installation positions can be installed in a functional manner. Also are Piston pumps are known in which the drive mechanism of the Piston or the plunger formed so far symmetrical is that the piston pump in both directions of rotation of its drive shaft works fully functional.

Insbesondere bei leistungsstarken Kolbenpumpen werden auf deren Saugseite so hohe Unterdrücke erzielt, daß es zur Ausbildung von Kavitation kommen kann, da die verwendeten Ventile und auch die angesaugte Flüssigkeit große Trägheit aufweisen, um ausreichend schnell der Kolben- bzw. Plungerbewegung folgen zu können. Außerdem unterstützt eine durch das träge Öffnen der Ventile verursachte Drosselwirkung im Ventilbereich die. Kavitationsentstehung. Kavitation ist in mehrfacher Hinsicht schädlich, zum einen wird durch sie die Pumpleistung reduziert und zum anderen kann sie zur Beschädigung der Ventile bzw. der Pumpe führen. Um die Entstehung von Kavitation zu verhindern, ist es bekannt, in der Zuleitung zur Kolbenpumpe eine Lade- bzw. Boosterpumpe anzuordnen, welche die saugseitige Flüssigkeit der Kolbenpumpe mit Druck beaufschlagt, so daß die saugseitigen Ventile der Kolbenpumpe in ihre Durchlaßstellung vorbelastet sind und die Flüssigkeit der Saugbewegung des Plungers bzw. des Kolbens ohne Kavitationsgefahr folgen kann. Während die Kolbenpumpe zur Erzielung eines hohen Enddruckes hydrostatisch arbeitet, kann die Boosterpumpe hydrodynamisch arbeiten, wodurch sich zwar ein deutlich niedrigerer aber ein zur Vermeidung der Kavitation ausreichender Vordruck erreichen läßt. Dabei wird als Boosterpumpe üblicherweise eine Strömungspumpe verwendet, bei der die Förderleistung durch die Rotation eines mit profilierten Schaufeln versehenen Pumpenrades erzielt wird.Especially with high-performance piston pumps whose suction side achieves such high negative pressures that it is used for training can come from cavitation because the valves used and the sucked-in liquid also has great inertia, to make the piston or plunger movement sufficiently quick to be able to follow. One also supports through the sluggish opening of the valves causes throttling in the valve area the. Kavitationsentstehung. Cavitation is in harmful in several respects, on the one hand it turns the Pump performance is reduced and secondly it can damage it of the valves or the pump. About the creation To prevent cavitation, it is known in the supply line to arrange a charge or booster pump for the piston pump, which the suction-side liquid of the piston pump with Pressurized so that the suction-side valves of the piston pump are preloaded in their open position and the Liquid of the suction movement of the plunger or the piston can follow without risk of cavitation. While the piston pump works hydrostatically to achieve a high final pressure, the booster pump can work hydrodynamically, which results in although a significantly lower one to avoid the Cavitation can achieve sufficient pre-pressure. Doing so a flow pump is usually used as a booster pump, where the conveying capacity by rotating one with profiled blades provided impeller is achieved.

Aus der DE 40 26 717.2 ist eine Pumpenanordnung der eingangs genannten Art bekannt. Eine derartige Pumpenanordnung läßt sich zu einer einheitlichen, kompakten Baugruppe ausbilden, die bei geringem Platzbedarf auf besonders einfache Weise montierbar ist.From DE 40 26 717.2 is a pump arrangement of the beginning known type known. Such a pump arrangement leaves develop into a uniform, compact assembly, in a particularly simple manner with a small footprint is mountable.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, eine Pumpenanordnung der eingangs genannten Art mit einfachen konstruktiven Maßnahmen dahingehend auszugestalten, daß sie bei ihrer Montage bzw. beim Anschluß der Antriebswelle eine erhöhte Variabilität aufweist.The present invention addresses the problem a pump arrangement of the type mentioned with simple constructive measures to the effect that when installing or connecting the drive shaft has an increased variability.

Dieses Problem wird erfindungsgemäß mit einer Pumpenanordnung mit den Merkmalen des Anspruches 1 gelöst.This problem is solved according to the invention with a pump arrangement solved with the features of claim 1.

Die Erfindung beruht dabei auf dem allgemeinen Gedanken, für die Pumpenanordnung eine in beiden Drehrichtungen der Antriebswelle funktionsfähige Kolbenpumpe mit einer Boosterpumpe zu kombinieren, die ebenfalls grundsätzlich dazu geeignet ist, in beiden Drehrichtungen der Antriebswelle in ausreichendem Maße funktionsfähig zu sein. Da es bei einer als Boosterpumpe verwendeten Pumpe nicht auf die Erzielung einer hohen Druckdifferenz ankommt und da im allgemeinen antriebsseitig ein hoher Leistungsüberschuß zur Verfügung steht, braucht eine derartige Boosterpumpe keinen effizienten Wirkungsgrad aufzuweisen. Im Hinblick auf diese Erkenntnis können daher bei der erfindungsgemäßen Pumpenanordnung auch solche Pumpen als Boosterpumpen zum Einsatz kommen, die für übliche Anwendungen, z.B. wegen ihres schlechten Wirkungsgrades, nicht in Frage kommen.The invention is based on the general idea for the pump arrangement one in both directions of rotation of the drive shaft functional piston pump with a booster pump to combine, which are also generally suitable is in both directions of rotation of the drive shaft in to be sufficiently functional. Since it is one Pump used as a booster pump is not achieving a high pressure difference arrives and generally on the drive side a high excess of power is available stands, such a booster pump does not need an efficient To show efficiency. In view of this finding can therefore in the pump arrangement according to the invention Pumps are also used as booster pumps that for common applications, e.g. because of their poor efficiency, not acceptable.

Bei der Erfindung ist das Pumpenrad der Lade- bzw. Boosterpumpe in einem strömungsoptimierten Umlenkabschnitt angeordnet, der eine Drehrichtung des Pumpenrades zur Erhaltung eines hohen Wirkungsgrades bevorzugt. Aufgrund der Ausbildung dieses Umlenkabschnittes als separates Bauteil kann dieses relativ einfach demontiert und seitenverkehrt wieder montiert werden. Auf diese Weise kehrt sich die bevorzugte Drehrichtung um. Dieser einfache, zur Anpassung der erfindungsgemäßen Pumpenanordnung an die örtlichen Gegebenheiten, insbesondere bei stationären, fest installierten Pumpenanordnungen, nur einmalig durchzuführende Montagevorgang gewährleistet eine hohe Effizienz der Boosterpumpe und somit auch der Pumpenanordnung.In the invention, the pump wheel of the charge or booster pump arranged in a flow-optimized deflection section, the one direction of rotation of the pump wheel to maintain a high efficiency preferred. Because of the training this deflection section as a separate component can do this disassembled relatively easily and reassembled laterally become. In this way, the preferred one is reversed Direction of rotation. This simple, to adapt the invention Pump arrangement to the local conditions, especially with stationary, permanently installed pump arrangements, assembly process to be carried out only once a high efficiency of the booster pump and thus also the pump arrangement.

Bei einer Ausgestaltungsform der erfindungsgemäßen Pumpenanordnung mit den Merkmalen des Anspruches 2 ist ein Wenden des Umlenkabschnittes auf besonders einfache Weise durchführbar.In one embodiment of the pump arrangement according to the invention with the features of claim 2 is a turning of the deflection section can be carried out in a particularly simple manner.

Insbesondere bei einer Ausführung entsprechend den Merkmalen des Anspruches 3 läßt sich die Befestigung des Umlenkabschnittes gleichzeitig mit der Befestigung des Deckels bewirken, wobei der Umlenkabschnitt ausschließlich durch ein Verspannen zwischen dem Deckel und der Basisplatte befestigt wird. Auf diese Weise müssen keine separaten Befestigungsmittel für den Umlenkabschnitt vorgesehen werden.Especially with a design according to the characteristics of claim 3, the attachment of the deflection section effect simultaneously with the attachment of the cover, the deflection section being exclusively by a Braced between the lid and the base plate attached becomes. This way, there is no need for separate fasteners be provided for the deflection section.

Bei einer besonders zweckmäßigen Ausgestaltungsform der erfindungsgemäßen Pumpenanordnung kann diese mit den Merkmalen des Anspruches 4 ausgestattet sein. Ein derartiger Zahnriemen zeichnet sich durch eine hohe Lebensdauer und einen geringen Wartungsbedarf aus.In a particularly expedient embodiment of the invention Pump arrangement can do this with the features of claim 4 be equipped. Such a timing belt is characterized by a long service life and a short one Maintenance needs.

Eine andere vorteilhafte Ausführungsform weist die Merkmale des Anspruches 5 auf. Diese Maßnahme bewirkt beim Anbau des Boosterpumpengehäuses eine Zentrierung bzw. Positionierung des Boosterpumpengehäuses gegenüber dem Kolbenpumpengehäuse und ermöglicht eine definierte Lage der Welle für das Pumpenrad und der diese z.B. über den Zahnriemen antreibenden gemeinsamen Antriebswelle für die Pumpen, die in der Regel auch am Kolbenpumpengehäuse gelagert ist. Somit müssen weniger Toleranzen bei der Herstellung der Einzelteile eingehalten werden.Another advantageous embodiment has the features of claim 5. This measure causes when the Booster pump housing a centering or positioning of the booster pump housing compared to the piston pump housing and enables a defined position of the shaft for the pump wheel and this e.g. driving over the timing belt common drive shaft for the pumps, which are usually is also mounted on the piston pump housing. So less have to Tolerances in the manufacture of the individual parts observed become.

Weitere erfindungswesentliche Merkmale und Vorteile ergeben sich aus den Unteransprüchen und aus der nachfolgenden Figurenbeschreibung einer bevorzugten Ausführungsform. Es zeigen, jeweils schematisch,

Fig. 1
eine Seitenansicht auf eine erfindungsgemäße Pumpenanordnung,
Fig. 2
eine Schnittansicht von oben auf einen Teil der Pumpenanordnung aus Fig. 1 und
Fig. 3
eine Ansicht auf einen Schnitt in der Symmetrieebene eines Umlenkabschnittes eines Boosterpumpengehäuses.
Further features and advantages essential to the invention result from the subclaims and from the following description of the figures of a preferred embodiment. Each shows schematically
Fig. 1
2 shows a side view of a pump arrangement according to the invention,
Fig. 2
a sectional view from above of part of the pump assembly of FIGS. 1 and
Fig. 3
a view of a section in the plane of symmetry of a deflection section of a booster pump housing.

Entsprechend Fig. 1 weist eine erfindungsgemäße Pumpenanordnung eine Plunger- bzw. Kolbenpumpe 1 mit einem Kolbenpumpengehäuse 2 auf. Die Kolbenpumpe 1 des Ausführungsbeispieles ist für eine liegende Montage vorgesehen, d.h. ihr nicht dargestellter Kolben bzw. Plunger arbeitet in einer horizontal verlaufenden Ebene. Zur Befestigung der Pumpenanordnung sind auf der entsprechend Fig. 1 unteren Seite des Kolbenpumpengehäuses 2 Anschlußflansche 3 und 4 vorgesehen. Die Pumpenanordnung bzw. das Kolbenpumpengehäuse 2 ist im Ausführungsbeispiel so ausgebildet, daß die Pumpenanordnung ohne größeren Aufwand sowohl auf ihrer Rückseite als auch auf ihrer Bauchseite montierbar ist. Zu diesem Zweck wird beispielsweise der Anschlußflansch 4 an der Stelle des Kolbenpumpengehäuses 2 montiert, an der in Fig. 1 noch eine Transportöse 5 befestigt ist. Die übrigen Anschluß- und Befestigungsmittel des Kolbenpumpengehäuses 2 bzw. der Pumpenanordnung sind in entsprechender Weise an der jeweils gegenüberliegenden Seite anbringbar oder sind bereits doppelt vorhanden.1 shows a pump arrangement according to the invention a plunger or piston pump 1 with a piston pump housing 2 on. The piston pump 1 of the embodiment is intended for horizontal installation, i.e. you not Piston or plunger shown works in a horizontal trending level. For fastening the pump arrangement are on the lower side of the piston pump housing corresponding to FIG. 1 2 connection flanges 3 and 4 are provided. The Pump arrangement or the piston pump housing 2 is in the embodiment designed so that the pump assembly without more effort both on their back and on its abdominal side is mountable. For this purpose, for example the connecting flange 4 at the location of the piston pump housing 2 mounted, on the in Fig. 1 still a lifting eye 5 is attached. The remaining connection and fastening means the piston pump housing 2 or the pump arrangement are in a corresponding manner on the opposite Side attachable or already exist twice.

Auf der in Fig. 1 dargestellten Seite des Kolbenpumpengehäuses 2 ist eine Lade- bzw. Boosterpumpe 6 mit einem Boosterpumpengehäuse 7 angeordnet. Das Boosterpumpengehäuse 7 ist mit einem scheibenförmigen Deckel 8 verschlossen, der mit Schrauben 9 am Boosterpumpengehäuse 7 befestigt ist. Im Dekkel 8 ist mittig eine saugseitige Öffnung 10 der Boosterpumpe 6 vorgesehen, die mit einer nicht dargestellten Zuleitung für die von der Pumpenanordnung zu fördernden Flüssigkeit kommuniziert.On the side of the piston pump housing shown in Fig. 1 2 is a charging or booster pump 6 with a booster pump housing 7 arranged. The booster pump housing 7 is closed with a disc-shaped cover 8, the with Screws 9 is attached to the booster pump housing 7. In the lid 8 is a suction opening 10 in the middle of the booster pump 6 provided with a feed line, not shown for the liquid to be pumped by the pump arrangement communicated.

Entsprechend der Schnittansicht in Fig. 2 ist im Boosterpumpengehäuse 7 ein Pumpenrad 11 auf einer Welle 12 befestigt, die drehbar im Boosterpumpengehäuse 7 bzw. im Kolbenpumpengehäuse 2 gelagert ist. Das Pumpenrad 11 ist als Radialpumpenrad ausgebildet und weist geradlinige, radial verlaufende Schaufeln 13 auf, wodurch die Förderleistung des Pumpenrades 11 in beiden Drehrichtungen der Welle 12 gleich groß ist.According to the sectional view in Fig. 2 is in the booster pump housing 7 a pump wheel 11 fastened on a shaft 12, which can be rotated in the booster pump housing 7 or in the piston pump housing 2 is stored. The pump wheel 11 is a radial pump wheel trained and has straight, radially extending Buckets 13, which increases the delivery rate of the pump wheel 11 is the same size in both directions of rotation of the shaft 12.

Das Pumpenrad 11 bzw. dessen Schaufeln 13 rotieren in einem Innenraum 14, der in einem als Umlenkabschnitt bezeichneten Abschnitt 15 des Boosterpumpengehäuses 7 ausgebildet ist.The pump wheel 11 or its blades 13 rotate in one Interior 14, which is referred to as a deflection section Section 15 of the booster pump housing 7 is formed.

Entsprechend Fig. 3 ist der Innenraum 14 im Umlenkabschnitt 15 so ausgebildet, daß sich der radiale Abstand zwischen dem Außenumfang des Pumpenrades 11 und der Innenseite des Umlenkabschnittes 15 spiralförmig erweitert bis zu einer druckseitigen Austrittsöffnung 16 der Boosterpumpe 6. Diese Austrittsöffnung 16 ist ihrerseits kommunizierend mit der Saugseite der Kolbenpumpe 1 verbunden. Diese spezielle Formgebung des Innenraumes 14, in dem das Pumpenrad 11 mit seinen Schaufeln 13 rotiert, bewirkt, daß die Förderleistung des Pumpenrades 11 in einer Drehrichtung optimiert ist. Diese bevorzugte Drehrichtung entspricht der Richtung, in der der Abstand zwischen dem Umfang des Pumpenrades 11 und der Innenseite des Umlenkabschnittes 15 zunimmt.3, the interior 14 is in the deflection section 15 designed so that the radial distance between the Outer circumference of the pump wheel 11 and the inside of the deflection section 15 spirally expanded to one on the pressure side Outlet opening 16 of the booster pump 6. This outlet opening 16 in turn communicates with the suction side connected to the piston pump 1. This special shape of the interior 14 in which the impeller 11 with its Blades 13 rotates, causing the delivery rate of the Pump wheel 11 is optimized in one direction of rotation. This preferred direction of rotation corresponds to the direction in which the Distance between the circumference of the impeller 11 and the inside of the deflection section 15 increases.

Um bei entgegengesetzter Drehrichtung des Pumpenrades 11 ebenfalls eine derart optimierte Förderleistung zu erzielen, ist der Umlenkabschnitt 15 als separates Bauteil ausgebildet, das demontierbar und gewendet wieder montierbar ist. Der Umlenkabschnitt 15 ist dazu bezüglich seiner Mittelebene, in welcher der Umlenkabschnitt in Fig. 3 geschnitten ist, zumindest bezüglich der Kontur seines Innenraumes 14 spiegelsymmetrisch ausgebildet. Diese Ausgestaltung bewirkt, daß sich beim Wenden des Umlenkabschnittes 15 um 180° bezüglich einer in der Symmetrieebene liegenden Spiegelachse 17 eine an dieser Spiegelachse 17 gespiegelte Innenkontur ergibt. Mit anderen Worten, während in Fig. 3 der radiale Spalt zwischen dem Außenumfang des Pumpenrades 11 und der Innenkontur des Umlenkabschnittes 15 im Uhrzeigersinn kleiner wird, nimmt er beim gewendeten Umlenkabschnitt 15 im Uhrzeigersinn zu. Im gezeigten Ausführungsbeispiel ist zusätzlich die Außenkontur des Umlenkabschnittes 15 im wesentlichen spiegelsymmetrisch zur Spiegelachse 17 ausgebildet, wodurch sich die Befestigung des Umlenkabschnittes 15 erheblich vereinfacht. Dabei ist auch ein Anschlußflansch 18, mit dem die Austrittsöffnung 16 der Boosterpumpe 6 an die Saugseite der Kolbenpumpe 1 anschließbar ist, so angeordnet, daß seine Mittelsenkrechte mit der Spiegelachse 17 zusammenfällt.In order to rotate the pump impeller 11 in the opposite direction to achieve such an optimized delivery rate, the deflection section 15 is designed as a separate component, that can be removed and reassembled. For this purpose, the deflection section 15 is in which the deflection section in Fig. 3 cut at least with regard to the contour of its interior 14 mirror-symmetrical. This configuration causes that when turning the deflection section 15 by 180 ° with respect a mirror axis 17 lying in the plane of symmetry an inner contour mirrored on this mirror axis 17 results. In other words, while in Fig. 3 the radial Gap between the outer circumference of the impeller 11 and the Inner contour of the deflection section 15 smaller clockwise is, he takes the turned deflection section 15 in Clockwise to. In the embodiment shown is additional the outer contour of the deflection section 15 essentially mirror-symmetrical to the mirror axis 17, whereby the attachment of the deflection section 15 significantly simplified. There is also a connecting flange 18 with which the outlet opening 16 of the booster pump 6 to the suction side the piston pump 1 can be connected, arranged so that its normal perpendicular coincides with the mirror axis 17.

Damit das Wenden des Umlenkabschnittes 15 besonders einfach gestaltet werden kann, ist der Umlenkabschnitt 15 entsprechend Fig. 2 durch den Deckel 8 am Boosterpumpengehäuse 7 befestigt. Dabei wird der Umlenkabschnitt 15 zwischen einer Basisplatte 19 und dem Deckel 8 mit Hilfe der Schrauben 9 verspannt. Die Abdichtung zwischen dem Umlenkabschnitt 15 und der Basisplatte 19 bzw. dem Deckel 8 wird jeweils mit einer axial wirkenden Dichtung 20 bewirkt, die beispielsweise aus einem Dichtring oder einer Dichtschnur besteht, die in eine entsprechende Nut eingesetzt ist.So that the turning of the deflection section 15 is particularly simple can be designed, the deflection section 15 is corresponding 2 through the cover 8 on the booster pump housing 7 attached. The deflection section 15 is between one Base plate 19 and the cover 8 using the screws 9 braced. The seal between the deflection section 15 and the base plate 19 and the cover 8 are each with an axially acting seal 20 causes, for example consists of a sealing ring or a sealing cord that is inserted into a corresponding groove.

Die Welle 12, an der das Pumpenrad 11 befestigt ist, weist an ihrem von dem Pumpenrad 11 abgewandten Bereich zwei Lager 21 und 22 auf. Während das Lager 21 vollständig im Boosterpumpengehäuse 7 positioniert gehalten ist, ist das andere, am Ende der Welle 12 angebrachte Lager 22 teilweise im Boosterpumpengehäuse 7 und teilweise im Kolbenpumpengehäuse 2 positioniert gehalten. Zu diesem Zweck ist im Kolbenpumpengehäuse 2 eine entsprechende Aussparung 23 vorgesehen. Diese besondere Lagerung der Welle 12 bewirkt eine definierte Lage der Welle 12 bezüglich einer diese antreibenden Antriebswelle 24, die ebenfalls am Kolbenpumpengehäuse 2 positioniert gelagert ist. Der Antrieb der Welle 12 erfolgt dabei über einen Zahnriemen 25, der ein an der Welle 12 befestigtes Zahnrad und ein an der Antriebswelle 24 befestigtes Zahnrad kraftübertragend miteinander verbindet.The shaft 12, to which the pump wheel 11 is attached, has at its area facing away from the impeller 11, two bearings 21 and 22 on. While the bearing 21 is completely in the booster pump housing 7 is positioned, the other is at the end of the shaft 12 mounted bearings 22 partially in the booster pump housing 7 and partly in the piston pump housing 2 kept positioned. For this purpose is in the piston pump housing 2 a corresponding recess 23 is provided. This special mounting of the shaft 12 causes a defined position the shaft 12 with respect to a drive shaft driving this 24, which is also positioned on the piston pump housing 2 is stored. The shaft 12 is driven via a toothed belt 25, which is attached to the shaft 12 Gear and a gear attached to the drive shaft 24 connects power-transmitting with each other.

Durch die definierte Lage der Welle 12 bezüglich der Antriebswelle 24 ergibt sich auch eine definierte Lage der daran befestigten Zahnräder mit der Folge, daß im Bereich der Kraftübertragung mit engen Fertigungstoleranzen gearbeitet werden kann.Due to the defined position of the shaft 12 with respect to the drive shaft 24 also results in a defined position of the gears attached to it with the result that in the area power transmission worked with tight manufacturing tolerances can be.

Die Positionierung des Lagers 22 im Kolbenpumpengehäuse 2 bewirkt außerdem eine Zentrierung des Boosterpumpengehäuses 7, während seiner Befestigung am Kolbenpumpengehäuse 2. Außerdem ist das Boosterpumpengehäuse 7 über das Lager 22 zusätzlich am Kolbenpumpengehäuse 2 abgestützt. Gleichzeitig kann das Boosterpumpengehäuse 7 durch diese Maßnahme an dieser Seite offen ausgebildet sein, wobei es erst bei seiner Montage am Kolbenpumpengehäuse 2 verschlossen wird. Dabei ergibt sich vorteilhafterweise eine kompaktere Bauweise für die erfindungsgemäße Pumpenanordnung.The positioning of the bearing 22 in the piston pump housing 2 also causes the booster pump housing to be centered 7, during its attachment to the piston pump housing 2. Also is the booster pump housing 7 via the bearing 22 in addition supported on the piston pump housing 2. simultaneously can the booster pump housing 7 by this measure on this Side be open, it is only at his Assembly on the piston pump housing 2 is closed. there advantageously results in a more compact design for the pump arrangement according to the invention.

Da eine Kolbenpumpe 1 die zu fördernde Flüssigkeit diskontinuierlich fördert, kann es an der Saugseite der Kolbenpumpe 1 zur Ausbildung von Schwingungen kommen. Derartige Schwingungen führen zu erheblichen Belastungen der Leitungen und anderer Pumpenteile auf der Saugseite der Kolbenpumpe 1 und somit auch zu Belastungen der Boosterpumpe 6. Zusätzlich wird dadurch auch die Gefahr von Kavitation erhöht. Um die schädlichen Auswirkungen derartiger Schwingungen zu verhindern, kann bei der erfindungsgemäßen Pumpenanordnung zwischen der Saugseite der Kolbenpumpe 1 und der Druckseite der Boosterpumpe 6 eine Schwingungsdämpfungseinrichtung angeordnet werden. Eine derartige Schwingungs- oder Pulsationsdämpfungseinrichtung ist beispielsweise in der DE 42 40 590 A1 beschrieben. Vorzugsweise wird diese Dämpfungseinrichtung im Kolbenpumpengehäuse 2 integriert, so daß keine zusätzlichen Bauteile zu montieren sind.Since a piston pump 1 discontinuously the liquid to be pumped promotes, it can on the suction side of the piston pump 1 come to the formation of vibrations. Such vibrations lead to considerable stress on the lines and other pump parts on the suction side of piston pump 1 and thus also loads on the booster pump 6. In addition this also increases the risk of cavitation. To the prevent harmful effects of such vibrations, can in the pump arrangement according to the invention between the suction side of the piston pump 1 and the pressure side of the Booster pump 6 arranged a vibration damping device become. Such a vibration or pulsation damping device is for example in DE 42 40 590 A1 described. This damping device is preferably in the Piston pump housing 2 integrated, so that no additional Components are to be assembled.

Claims (7)

  1. A pump arrangement including a plunger or piston pomp (1) and a charging or booster pump (6) that can be driven via a shared drive shaft and are combined with their housings (2, 7) in an integral unit,
    wherein the housing (7) of the charging or booster pump (6) has a by-pass section (15), inside which a radially supplying pump wheel (11) with radially travelling fins (13) is arranged on a shaft (12) and an internal cavity (14) is configured, which extends helically between the external periphery of the pump wheel (11) and the interior side of the by-pass section (15) to form an outlet opening (16) on the pressure side of the charging or booster pump (6),
    characterized in that
    the housing (7) of the charging or booster pump (6) is closed by a cap (8) that is detachably affixed to housing (7) and that the by-pass section (15), which is configured as a separate component, may be detached from a baseplate (19) when cap (8) is absent and provides a mirrored inner contour of the inner cavity (14) when installed in a manner rotated through 180° to allow running capability of the pump arrangement in both directions of rotation.
  2. The pump arrangement according to claim 1,
    characterized in that
    the attachment means (9) are provided, with which both the by-pass section (15) and the cap (8) can be attached to the baseplate (19).
  3. The pump arrangement according to claim 1 or 2,
    characterized in that
    when the cap (8) is attached the by-pass section (15) is clamped between the cap (8) and the baseplate (19).
  4. The pump arrangement according to any of claims 1 to 3,
    characterized in that
    the pump wheel (11) in the booster pump housing (7) is arranged on a shaft (12) that can be driven by the drive shaft (24) of the booster pump (6) or the piston pump (1) via a toothed belt (25).
  5. The pump arrangement according to any of claims 1 to 4,
    characterized in that
    the pump wheel (11) in the booster pump housing (7) is arranged on a shaft (12), the axial end of which farthest from the pump wheel (11) is seated in a bearing (22) that is retained in position partly in the piston pump housing (2) and partly in the booster pump housing (7).
  6. The pump arrangement according to any of claims 1 to 5,
    characterized in that
    in a horizontally mountable pump arrangement both the rear side and the belly side of the piston pump housing (2) are furnished with the necessary connection and fixing means (3, 4), the booster pump housing (7) being arranged beside the piston pump housing (2).
  7. The pump arrangement according to any of claims 1 to 6,
    characterized in that
    a pulse damping device is built into the piston pump housing (2).
EP98111868A 1997-07-25 1998-06-26 Combination of a piston pump with a booster pump Expired - Lifetime EP0893601B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732062A DE19732062A1 (en) 1997-07-25 1997-07-25 Pump arrangement with a piston pump and a booster pump
DE19732062 1997-07-25

Publications (3)

Publication Number Publication Date
EP0893601A2 EP0893601A2 (en) 1999-01-27
EP0893601A3 EP0893601A3 (en) 2000-03-01
EP0893601B1 true EP0893601B1 (en) 2004-05-12

Family

ID=7836891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111868A Expired - Lifetime EP0893601B1 (en) 1997-07-25 1998-06-26 Combination of a piston pump with a booster pump

Country Status (2)

Country Link
EP (1) EP0893601B1 (en)
DE (2) DE19732062A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352029A1 (en) * 2003-11-07 2005-06-16 SCHWäBISCHE HüTTENWERKE GMBH Displacement pump has preloading device in form of flow pump with at least one feed wheel rotationally driven by drive shaft, whereby feed wheel of flow pump is torsionally fixed in relation to drive shaft
DE102011084532B4 (en) * 2011-10-14 2013-11-14 Continental Automotive Gmbh pump assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB590199A (en) * 1944-12-19 1947-07-10 Fawcett Preston & Co Ltd Improvements in swash plate pumps for liquids
FR2439312A1 (en) * 1978-10-16 1980-05-16 Messier Hispano Sa Hydraulic pump with booster stage - has rotor eccentric in casing with radial blades to move fluid to main intake
EP0061159A3 (en) * 1981-03-20 1983-04-20 Houdaille Industries, Inc. Reversible centrifugal pump with identical hydraulic performance either way
DE3741977A1 (en) * 1987-12-11 1989-06-22 Philips Patentverwaltung PUMPING DEVICE FOR LIGHT VISCOSE LIQUIDS
DE4026717A1 (en) * 1990-08-24 1992-02-27 Uraca Pumpen Displacement or piston pump - has booster pump connected to its crankshaft via magnetic or electrodynamic coupling
US5220225A (en) * 1992-06-17 1993-06-15 Vickers, Incorporated Integrated electric motor driven inline hydraulic apparatus

Also Published As

Publication number Publication date
EP0893601A3 (en) 2000-03-01
DE59811361D1 (en) 2004-06-17
DE19732062A1 (en) 1999-01-28
EP0893601A2 (en) 1999-01-27

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