EP1260712A2 - Piston pump - Google Patents

Piston pump Download PDF

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Publication number
EP1260712A2
EP1260712A2 EP02004477A EP02004477A EP1260712A2 EP 1260712 A2 EP1260712 A2 EP 1260712A2 EP 02004477 A EP02004477 A EP 02004477A EP 02004477 A EP02004477 A EP 02004477A EP 1260712 A2 EP1260712 A2 EP 1260712A2
Authority
EP
European Patent Office
Prior art keywords
plunger
pump
housing
pump according
sealing means
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
EP02004477A
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German (de)
French (fr)
Other versions
EP1260712B1 (en
EP1260712A3 (en
Inventor
Stephan Dr. Notzon
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.)
Paul Hammelmann Maschinenfabrik GmbH
Hammelmann Maschinenfabrik GmbH
Original Assignee
Paul Hammelmann Maschinenfabrik GmbH
Hammelmann Maschinenfabrik GmbH
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Publication date
Application filed by Paul Hammelmann Maschinenfabrik GmbH, Hammelmann Maschinenfabrik GmbH filed Critical Paul Hammelmann Maschinenfabrik GmbH
Publication of EP1260712A2 publication Critical patent/EP1260712A2/en
Publication of EP1260712A3 publication Critical patent/EP1260712A3/en
Application granted granted Critical
Publication of EP1260712B1 publication Critical patent/EP1260712B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/143—Sealing provided on the piston

Definitions

  • the present invention relates to a pump, in particular a plunger pump, with a crank mechanism, which is arranged in a housing and in a receptacle guided plunger drives oscillating, and a fixed to the housing Pump head for directing the pressurized fluid, the Housing surrounds the crank mechanism and the plunger.
  • plunger pumps that are used particularly in high pressure water technology because they are compact and reliable at pressures between 100 and 3000 bar can be used. These plunger pumps have compared to others Pump types, such as rotating positive displacement pumps have the advantage of a good one energetic efficiency and are able to handle even difficult fluid conditions, such as high temperature, low and high viscosity media as well as solids To promote liquids.
  • the plunger pumps are relatively quiet and low-vibration running and are easy to maintain.
  • a disadvantage of these vertical arranged plunger pumps is that in the lower housing part with the Crank drive oil is present, making this housing area opposite the upper one Housing area by appropriate wipers or a complex to install Suction chamber seal must be installed. For this, the surface of the Piston rod are processed to accommodate a corresponding sealing ring.
  • the pressure-tight seal to a lower housing space containing the crank mechanism needs the plunger or a vertical sealing and guide element attached to the plunger no longer guided in a recording with particularly high precision to be a seal to the upper housing part.
  • the elastic sealants serve, among other things, as splash protection an entry of oil from the area of the crank mechanism into the upper housing part to avoid.
  • Such a hermetic seal of the lower housing part offers This is particularly advantageous for chemical pumps, as it is resistant to media and water jets Sealing was previously only possible with diaphragm pumps.
  • a is in the housing Clearance above the lower housing area and below the pump head educated. This space can be filled with air. So that exists a clear separation between a fluid space in the pump head, the gap, which is filled with air and the space of the crank mechanism in which oil is contained is.
  • the sealant is preferably on one side on the plunger and on the opposite Side fixed to the housing. Assembly is made easier if inner webs are formed on the housing which surround the plunger in a ring shape, so that the sealant is only clamped onto this housing section become.
  • the sealant can be designed as an annular or conical bellows his. A conical configuration of the bellows has the advantage that it will snap out is prevented.
  • the shafts provided on the bellows should be in one such a number should be provided that there is no flutter even at high stroke frequencies occurs. With a gastight design of the sealant, the pump can be in one extreme environment.
  • the plunger can be constructed in several parts to hold the sealant on a lower one To be able to clamp the plunger element.
  • the plunger is piston-shaped in the upper area in a socket or receptacle for the plunger seal.
  • the pump has several adjacent plungers, with each plunger sealant to a lower one Housing space are provided.
  • the multiple plungers can then become one Pump unit can be combined to provide a large delivery volume.
  • the pump is therefore preferably designed as a high-pressure plunger pump.
  • a plunger pump 1 shown in FIGS. 1 and 2 comprises a single or multi-part housing 2 in which a lower crank mechanism 3 is provided.
  • the crank gear 3 is used to drive a plunger 5, which is formed in several parts and comprises a lower plunger section 4.
  • the plunger 5 is made of highly wear-resistant Material such as ceramic or hard metal is manufactured and glides without pressure in a barrel sleeve or receptacle 51, not shown, for sealing of the annular gap formed around the plunger 5.
  • This receptacle 51 forms a High pressure sealing and can be used as a labyrinth, packing or hydrodynamic sealing be trained.
  • Below the receptacle 51 is a low pressure seal 52 is provided, which is designed as a packing or elastomer sealing ring. Due to the vertical structure, the plunger pump 1 can work weight-neutral.
  • a pump head 6 is provided on the housing 2 in the upper region, in which Channels for guiding a fluid are formed.
  • the pump head 6 is over bolts 11 attached to the housing 2.
  • a suction chamber 9 turns downward of the plunger 5 fluid is sucked into the space 8.
  • the plunger 5 moves up and closes a valve gives access to the suction chamber 9.
  • a valve 50 is actuated that opens access to a pressure chamber 10. By moving the plunger 5 from a certain pressure, the fluid is thus upwards into the Pump chamber 10 pumped and distributed over corresponding lines.
  • an annular and conical bellows 7 For sealing between a lower housing space 19 in which the crank mechanism 3 is arranged, and an air-filled space 12 is an annular and conical bellows 7 is provided. Due to the conical and wavy Forming the bellows 7 is a buckling in the movement of the Plungers 5 prevented.
  • the bellows 7 is fixed on one side to the plunger 5, a flange 43 being provided on the lower plunger section 4 an annular section 14 tightly clamped by a clamping element 15 is. On the opposite side, the bellows 7 is on an annular Recording 17 sealed via additional clamping elements.
  • the recording 17 is integrally connected to the housing 2 via inner webs.
  • the bellows 7 is made of a media-resistant and water-jet resistant material formed so that the pump 1 can also be used under extreme conditions can.
  • the wall thickness of the flexible material of the bellows 7 is approximately 1 to 2 mm.
  • a plurality of plungers 5 are arranged next to one another.
  • the crank mechanism 3 is driven via a pinion shaft 30, the Comb the pinion with one or more gears 29.
  • the gears 29 are with connected to a crankshaft, with the eccentric attachment of the connecting rod pins an oscillating movement of the plunger 5 is generated.
  • the guide element 21 is guided in a receptacle 20, between the guide element 21 and the receptacle 20 no expensive sealants need to be provided since the bellows 7 provides a hermetic seal and forms a splash guard. This The type of elastic sealing by the bellows 7 also prevents wear of sealants such as sliding guides etc.
  • 3 are plungers in the exemplary embodiment shown mounted in the housing 2. It is also possible to have fewer or more plungers 5 in summarize a pump unit.
  • the lower plunger section 4 comprises a flange 43 for fixing the bellows 7. There is a stop within the flange 43 44 provided for connection to the upper part of the plunger 5. On the opposite On the side, a pin 41 is formed which fits into the guide element 21 intervenes. The pin 41 has a reduced diameter, so that compressive forces can be removed from the guide element 21 via a shoulder 42.

Abstract

The plunger pump has a crank drive (3) driving the plunger (5) set in the housing. The plunger is fitted with elastic sealing means (7) which produce a pressure-tight seal with a lower housing chamber (19) which contains the crank drive. The sealing means are preferably fixed on the plunger on one side and on the housing on the other.

Description

Die vorliegende Erfindung betrifft eine Pumpe, insbesondere eine Plungerpumpe, mit einem Kurbeltrieb, der einen in einem Gehäuse angeordneten und in einer Aufnahme geführten Plunger oszillierend antreibt, und einem an dem Gehäuse festgelegten Pumpenkopf zur Leitung des mit Druck beaufschlagten Fluids, wobei das Gehäuse den Kurbeltrieb und den Plunger umgibt.The present invention relates to a pump, in particular a plunger pump, with a crank mechanism, which is arranged in a housing and in a receptacle guided plunger drives oscillating, and a fixed to the housing Pump head for directing the pressurized fluid, the Housing surrounds the crank mechanism and the plunger.

Es gibt Plungerpumpen, die insbesondere in der Hochdruckwassertechnik eingesetzt werden, da diese kompakt sind und betriebssicher bei Drücken zwischen 100 und 3000 bar eingesetzt werden können. Diese Plungerpumpen besitzen gegenüber anderen Pumpenbauarten, wie rotierenden Verdrängerpumpen den Vorteil eines guten energetischen Wirkungsgrades und sind in der Lage, auch schwierige Fluidbedingungen, wie hohe Temperatur, niedrig- und hochviskose Medien sowie feststoffbeladene Flüssigkeiten zu fördern. Die Plungerpumpen besitzen einen relativ ruhigen und schwingungsarmen Lauf und sind einfach zu warten. Nachteilig bei diesen vertikal angeordneten Plungerpumpen ist, dass in dem unteren Gehäuseteil mit dem Kurbeltrieb Öl vorhanden ist, so dass dieser Gehäusebereich gegenüber dem oberen Gehäusebereich durch entsprechende Abstreifer oder eine aufwendig zu installierende Saugraumabdichtung montiert werden muß. Hierfür muß die Oberfläche der Kolbenstange bearbeitet werden, um einen entprechenden Dichtring aufzunehmen.There are plunger pumps that are used particularly in high pressure water technology because they are compact and reliable at pressures between 100 and 3000 bar can be used. These plunger pumps have compared to others Pump types, such as rotating positive displacement pumps have the advantage of a good one energetic efficiency and are able to handle even difficult fluid conditions, such as high temperature, low and high viscosity media as well as solids To promote liquids. The plunger pumps are relatively quiet and low-vibration running and are easy to maintain. A disadvantage of these vertical arranged plunger pumps is that in the lower housing part with the Crank drive oil is present, making this housing area opposite the upper one Housing area by appropriate wipers or a complex to install Suction chamber seal must be installed. For this, the surface of the Piston rod are processed to accommodate a corresponding sealing ring.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Pumpe, insbesondere eine Plungerpumpe der eingangs genannten Art zu schaffen, bei der auf einfache Weise eine zuverlässige Abdichtung zu dem unteren den Kurbeltrieb enthaltenden Gehäuseraum bereitgestellt wird und die auch unter extremen Umgebungsbedingungen einsetzbar ist.It is therefore an object of the present invention to provide a pump, in particular a pump To create plunger pump of the type mentioned in the simple way a reliable seal to the lower housing space containing the crank mechanism is provided and even under extreme environmental conditions can be used.

Diese Aufgabe wird mit einer Pumpe mit den Merkmalen des Anspruches 1 gelöst.This object is achieved with a pump with the features of claim 1.

Wenn am Plunger elastische Dichtmittel festgelegt sind, die eine druckdichte Abdichtung zu einem unteren den Kurbeltrieb enthaltenden Gehäuseraum bereitstellen, braucht der Plunger bzw. ein am Plunger befestigtes vertikales Dichtungs- und Führungselement nicht mehr mit besonders hoher Präzision in einer Aufnahme geführt zu sein, um eine Abdichtung zu dem oberen Gehäuseteil zu erzeugen. Es kann beispielsweise auf eine Bearbeitung der Oberfläche der Plungerstange für Dichtringaufnahmen entfallen oder ein Gleitring oder Simmering kann eingespart werden. Die elastischen Dichtmittel dienen dabei unter anderem als Spritzschutz, um einen Eintritt von Öl aus dem Bereich des Kurbeltriebes in den oberen Gehäuseteil zu vermeiden. Eine solche hermetische Abdichtung des unteren Gehäuseteils bietet insbesondere Vorteile für Chemiepumpen, da eine solche medien- und wasserstrahlbeständige Abdichtung bisher nur mit Membranpumpen möglich war. Insbesondere wenn das zu fördernde Fluid schmutzbeladen, giftig, gesundheitsschädlich, korrosiv, explosiv oder brennbar ist, kommen die Vorteile der hermetischen Abdichtung zum Tragen. Wenn das Fluid schlecht schmierend ist, könnte ohne eine entsprechende Abdichtung eine Triebwerksschmierung beeinträchtigt werden.If elastic plungers are attached to the plunger, the pressure-tight seal to a lower housing space containing the crank mechanism, needs the plunger or a vertical sealing and guide element attached to the plunger no longer guided in a recording with particularly high precision to be a seal to the upper housing part. For example, it can on processing the surface of the plunger rod for sealing ring receptacles omitted or a slide ring or simmering can be saved. The elastic sealants serve, among other things, as splash protection an entry of oil from the area of the crank mechanism into the upper housing part to avoid. Such a hermetic seal of the lower housing part offers This is particularly advantageous for chemical pumps, as it is resistant to media and water jets Sealing was previously only possible with diaphragm pumps. In particular if the fluid to be pumped is contaminated, toxic, harmful to health, is corrosive, explosive or flammable, the advantages of hermetic sealing come to carry. If the fluid is poorly lubricating, without one appropriate sealing an engine lubrication can be affected.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist in dem Gehäuse ein Zwischenraum oberhalb des unteren Gehäuseraumes und unterhalb des Pumpenkopfes ausgebildet. Dieser Zwischenraum kann mit Luft gefüllt sein. Damit besteht eine klare Trennung zwischen einem Fluidraum im Pumpenkopf, dem Zwischenraum, der mit Luft gefüllt ist und dem Raum des Kurbeltriebes, in dem Öl enthalten ist.According to a preferred embodiment of the invention, a is in the housing Clearance above the lower housing area and below the pump head educated. This space can be filled with air. So that exists a clear separation between a fluid space in the pump head, the gap, which is filled with air and the space of the crank mechanism in which oil is contained is.

Vorzugsweise ist das Dichtmittel auf der einen Seite am Plunger und auf der gegenüberliegenden Seite am Gehäuse festgelegt. Die Montage wird dabei erleichtert, wenn an dem Gehäuse Innenstege ausgebildet sind, die den Plunger ringförmig umgeben, so dass die Dichtmittel lediglich auf diesen Gehäuseabschnitt aufgeklemmt werden. Um eine ausreichende Elastizität für die Bewegung des Plungers zu besitzen, kann das Dichtmittel als ringförmiger oder konischer Faltenbalg ausgebildet sein. Eine konische Ausbildung des Faltenbalgs hat den Vorteil, dass ein Ausknikken verhindert wird. Die an dem Faltenbalg vorgesehenen Wellen sollten in einer solchen Anzahl vorgesehen werden, dass auch bei hohen Hubfrequenzen kein Flattern auftritt. Bei einer gasdichten Ausbildung der Dichtmittel kann die Pumpe in einer extremen Umgebung eingesetzt werden.The sealant is preferably on one side on the plunger and on the opposite Side fixed to the housing. Assembly is made easier if inner webs are formed on the housing which surround the plunger in a ring shape, so that the sealant is only clamped onto this housing section become. In order to have sufficient elasticity for the movement of the plunger, the sealant can be designed as an annular or conical bellows his. A conical configuration of the bellows has the advantage that it will snap out is prevented. The shafts provided on the bellows should be in one such a number should be provided that there is no flutter even at high stroke frequencies occurs. With a gastight design of the sealant, the pump can be in one extreme environment.

Der Plunger kann mehrteilig ausgebildet sein, um das Dichtmittel an einem unteren Plungerelement festklemmen zu können. Im oberen Bereich ist der Plunger kolbenförmig in einer Buchse bzw. Aufnahme für die Plungerabdichtung aufgenommen.The plunger can be constructed in several parts to hold the sealant on a lower one To be able to clamp the plunger element. The plunger is piston-shaped in the upper area in a socket or receptacle for the plunger seal.

Gemäß einer weiteren Ausführungsform der Erfindung weist die Pumpe mehrere benachbarte Plunger auf, wobei um jeden Plunger Dichtmittel zu einem unteren Gehäuseraum vorgesehen sind. Die mehreren Plunger können dann zu einer gemeinsamen Pumpeinheit zusammengefasst sein, um ein großes Fördervolumen bereitzustellen. Vorzugsweise ist daher die Pumpe als Hochdruckplungerpumpe ausgebildet.According to a further embodiment of the invention, the pump has several adjacent plungers, with each plunger sealant to a lower one Housing space are provided. The multiple plungers can then become one Pump unit can be combined to provide a large delivery volume. The pump is therefore preferably designed as a high-pressure plunger pump.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispieles mit Bezug auf die beigefügten Zeichnungen näher erläutert. Es zeigen:

Figur 1
eine geschnittene Seitenansicht durch ein Ausführungsbeispiel einer erfindungsgemäßen Pumpe;
Figur 2
eine geschnittene Draufsicht auf die wesentlichen Teile der Pumpe der Figur 1;
Figur 3
eine Detailansicht des unteren Plungerabschnittes.
The invention is explained below using an exemplary embodiment with reference to the accompanying drawings. Show it:
Figure 1
a sectional side view through an embodiment of a pump according to the invention;
Figure 2
a sectional plan view of the essential parts of the pump of Figure 1;
Figure 3
a detailed view of the lower plunger section.

Eine in den Figuren 1 und 2 dargestellte Plungerpumpe 1 umfasst ein ein- oder mehrteiliges Gehäuse 2 in dem ein unterer Kurbeltrieb 3 vorgesehen ist. Das Kurbelgetriebe 3 dient zum Antrieb eines Plungers 5, der mehrteilig ausgebildet ist und einen unteren Plungerabschnitt 4 umfasst. Der Plunger 5 ist aus hoch verschleißfestem Material, wie Keramik oder Hartmetall hergestellt und gleitet ohne Anpressung in einer nicht näher dargestellten Laufhülse bzw. Aufnahme 51 zur Abdichtung des um den Plunger 5 gebildeten Ringspaltes. Diese Aufnahme 51 bildet eine Hochdruckabdichtung und kann als Labyrinth, Packung oder hydrodynamische Abdichtung ausgebildet sein. Unterhalb der Aufnahme 51 ist eine Niederdruckabdichtung 52 vorgesehen, die als Packung oder Elastomer-Dichtring ausgebildet ist. Durch den vertikalen Aufbau kann die Plungerpumpe 1 gewichtsneutral arbeiten.A plunger pump 1 shown in FIGS. 1 and 2 comprises a single or multi-part housing 2 in which a lower crank mechanism 3 is provided. The crank gear 3 is used to drive a plunger 5, which is formed in several parts and comprises a lower plunger section 4. The plunger 5 is made of highly wear-resistant Material such as ceramic or hard metal is manufactured and glides without pressure in a barrel sleeve or receptacle 51, not shown, for sealing of the annular gap formed around the plunger 5. This receptacle 51 forms a High pressure sealing and can be used as a labyrinth, packing or hydrodynamic sealing be trained. Below the receptacle 51 is a low pressure seal 52 is provided, which is designed as a packing or elastomer sealing ring. Due to the vertical structure, the plunger pump 1 can work weight-neutral.

An dem Gehäuse 2 ist im oberen Bereich ein Pumpenkopf 6 vorgesehen, in dem Kanäle zur Leitung eines Fluides ausgebildet sind. Der Pumpenkopf 6 ist über Bolzen 11 an dem Gehäuse 2 befestigt.A pump head 6 is provided on the housing 2 in the upper region, in which Channels for guiding a fluid are formed. The pump head 6 is over bolts 11 attached to the housing 2.

Zum Pumpen eines Fluids wird aus einem Saugraum 9 bei einer Abwärtsbewegung des Plungers 5 Fluid in den Raum 8 eingesaugt. Sobald der Plunger 5 die tiefste Stelle durchlaufen hat, bewegt sich der Plunger 5 nach oben und verschließt über ein Ventil den Zugang zu dem Saugraum 9. Ferner wird ein Ventil 50 betätigt, dass einen Zugang zu einem Druckraum 10 öffnet. Durch Bewegung des Plungers 5 nach oben wird ab Erzeugung eines bestimmten Druckes das Fluid somit in den Druckraum 10 gepumpt und über entsprechende Leitungen verteilt. For pumping a fluid, a suction chamber 9 turns downward of the plunger 5 fluid is sucked into the space 8. Once the plunger 5 is the deepest Has passed through, the plunger 5 moves up and closes a valve gives access to the suction chamber 9. Furthermore, a valve 50 is actuated that opens access to a pressure chamber 10. By moving the plunger 5 from a certain pressure, the fluid is thus upwards into the Pump chamber 10 pumped and distributed over corresponding lines.

Zur Abdichtung zwischen einem unteren Gehäuseraum 19, in dem der Kurbeltrieb 3 angeordnet ist, und einem mit Luft gefüllten Zwischenraum 12 ist ein ringförmiger und konisch ausgebildeter Faltenbalg 7 vorgesehen. Durch die konische und wellenförmige Ausbildung des Faltenbalgs 7 wird ein Ausknicken bei der Bewegung des Plungers 5 verhindert. Der Faltenbalg 7 ist an einer Seite an dem Plunger 5 festgelegt, wobei an dem unteren Plungerabschnitt 4 ein Flansch 43 vorgesehen ist, an dem ein ringförmiger Abschnitt 14 über ein Klemmelement 15 dicht festgeklemmt ist. An der gegenüberliegenden Seite ist der Faltenbalg 7 an einer ringförmigen Aufnahme 17 über weitere Klemmelemente dichtend festgelegt. Die Aufnahme 17 ist über Innenstege integral mit dem Gehäuse 2 verbunden.For sealing between a lower housing space 19 in which the crank mechanism 3 is arranged, and an air-filled space 12 is an annular and conical bellows 7 is provided. Due to the conical and wavy Forming the bellows 7 is a buckling in the movement of the Plungers 5 prevented. The bellows 7 is fixed on one side to the plunger 5, a flange 43 being provided on the lower plunger section 4 an annular section 14 tightly clamped by a clamping element 15 is. On the opposite side, the bellows 7 is on an annular Recording 17 sealed via additional clamping elements. The recording 17 is integrally connected to the housing 2 via inner webs.

Der Faltenbalg 7 ist aus einem medienbeständigem und wasserstrahlfestem Material gebildet, so dass die Pumpe 1 auch unter extremen Bedingungen eingesetzt werden kann. Die Wandstärke des flexiblen Material des Faltenbalgs 7 beträgt etwa 1 bis 2 mm.The bellows 7 is made of a media-resistant and water-jet resistant material formed so that the pump 1 can also be used under extreme conditions can. The wall thickness of the flexible material of the bellows 7 is approximately 1 to 2 mm.

In dem gezeigten Ausführungsbeispiel sind mehrere Plunger 5 nebeneinander angeordnet. Dabei wird der Kurbeltrieb 3 über eine Ritzelwelle 30 angetrieben, deren Ritzel mit ein- oder mehreren Zahnrädern 29 kämmen. Die Zahnräder 29 sind mit einer Kurbelwelle verbunden, wobei durch die exzentrische Anbringung der Pleuelzapfen eine oszillierende Bewegung des Plungers 5 erzeugt wird. Dabei ist ein Führungselement 21 an einer Achse 22 am Pleuel 32 angelenkt. In dem unteren Gehäuseraum 19 ist eine Öldruckumlaufschmierung vorgesehen. Das Führungselement 21 ist in einer Aufnahme 20 geführt, wobei zwischen Führungselement 21 und Aufnahme 20 keine aufwendigen Dichtmittel vorgesehen sein müssen, da der Faltenbalg 7 eine hermetische Abdichtung bereitstellt und einen Spritzschutz bildet. Diese Art der elastischen Abdichtung durch den Faltenbalg 7 verhindert auch einen Verschleiß von Dichtmitteln, wie Gleitführungen etc. In the exemplary embodiment shown, a plurality of plungers 5 are arranged next to one another. The crank mechanism 3 is driven via a pinion shaft 30, the Comb the pinion with one or more gears 29. The gears 29 are with connected to a crankshaft, with the eccentric attachment of the connecting rod pins an oscillating movement of the plunger 5 is generated. There is a guide element 21 articulated on an axle 22 on the connecting rod 32. In the lower case room 19 oil pressure circulation lubrication is provided. The guide element 21 is guided in a receptacle 20, between the guide element 21 and the receptacle 20 no expensive sealants need to be provided since the bellows 7 provides a hermetic seal and forms a splash guard. This The type of elastic sealing by the bellows 7 also prevents wear of sealants such as sliding guides etc.

Wie in Figur 2 zu erkennen ist, sind bei dem gezeigten Ausführungsbeispiel 3 Plunger in dem Gehäuse 2 montiert. Es ist auch möglich weniger oder mehr Plunger 5 in einer Pumpeneinheit zusammenzufassen.As can be seen in FIG. 2, 3 are plungers in the exemplary embodiment shown mounted in the housing 2. It is also possible to have fewer or more plungers 5 in summarize a pump unit.

Wie in Figur 3 dargestellt ist, umfasst der untere Plungerabschnitt 4 einen Flansch 43 zur Festlegung des Faltenbalges 7. Innerhalb des Flansches 43 ist ein Anschlag 44 zur Verbindung mit dem oberen Teil des Plungers 5 vorgesehen. An der gegenüberliegenden Seite ist ein Zapfen 41 ausgebildet, der in das Führungselement 21 eingreift. Der Zapfen 41 weist einen verringerten Durchmesser auf, so dass Druckkräfte von dem Führungselement 21 über eine Schulter 42 abgetragen werden können.As shown in Figure 3, the lower plunger section 4 comprises a flange 43 for fixing the bellows 7. There is a stop within the flange 43 44 provided for connection to the upper part of the plunger 5. On the opposite On the side, a pin 41 is formed which fits into the guide element 21 intervenes. The pin 41 has a reduced diameter, so that compressive forces can be removed from the guide element 21 via a shoulder 42.

Claims (10)

Pumpe (1), insbesondere Plungerpumpe, mit einem Kurbeltrieb (3), der einen in einem Gehäuse angeordneten und in einer Aufnahme (51) geführten Plunger (5) oszillierend antreibt, und einem an dem Gehäuse (2) festgelegten Pumpenkopf (6) zur Leitung des von einem Saugraum (9) abgezogenen mit Druck beaufschlagten Fluids, wobei das Gehäuse (2) den Kurbeltrieb (3) und den Plunger (5) umgibt, dadurch gekennzeichnet, dass am Plunger (5) elastische Dichtmittel (7) festgelegt sind, die eine druckdichte Abdichtung zu einem unteren den Kurbeltrieb (3) enthaltenden Gehäuseraum (19) bereitstellen.Pump (1), in particular a plunger pump, with a crank mechanism (3) which drives a plunger (5) arranged in a housing and guided in a receptacle (51) in an oscillating manner, and a pump head (6) fixed to the housing (2) Conduction of the pressurized fluid drawn off from a suction chamber (9), the housing (2) surrounding the crank mechanism (3) and the plunger (5), characterized in that elastic sealing means (7) are fixed to the plunger (5), which provide a pressure-tight seal to a lower housing space (19) containing the crank mechanism (3). Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass in dem Gehäuse (2) ein Zwischenraum (12) oberhalb des unteren Gehäuseraumes (19) und unterhalb des Pumpenkopfes (6) ausgebildet ist.Pump according to Claim 1, characterized in that an intermediate space (12) is formed in the housing (2) above the lower housing space (19) and below the pump head (6). Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Dichtmittel (7) auf der einen Seite am Plunger (5) und auf der gegenüberliegenden Seite am Gehäuse (2) festgelegt ist.Pump according to claim 1 or 2, characterized in that the sealing means (7) is fixed on one side to the plunger (5) and on the opposite side to the housing (2). Pumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Dichtmittel (7) als ringförmiger und/oder konischer Faltenbalg ausgebildet ist.Pump according to one of claims 1 to 3, characterized in that the sealing means (7) is designed as an annular and / or conical bellows. Pumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Dichtmittel (7) eine gasdichte Abdichtung zwischen dem Gehäuseraum (19) und dem Zwischenraum (12) bereitstellen.Pump according to one of claims 1 to 4, characterized in that the sealing means (7) provide a gas-tight seal between the housing space (19) and the intermediate space (12). Pumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass um den Plunger (5) eine Hochdruckabdichtung (51) und eine an den Zwischenraum (12) angrenzende Niederdruckabdichtung (52) vorgesehen ist. Pump according to one of Claims 1 to 5, characterized in that a high-pressure seal (51) and a low-pressure seal (52) adjacent to the intermediate space (12) are provided around the plunger (5). Pumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Dichtmittel (7) einen Spritzschutz gegen Öl aus dem unteren Gehäuseraum (19) bilden und der Zwischenraum (12) mit Luft gefüllt ist.Pump according to one of claims 1 to 6, characterized in that the sealing means (7) form a splash guard against oil from the lower housing space (19) and the intermediate space (12) is filled with air. Pumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Plunger (5) mehrteilig ausgebildet ist.Pump according to one of claims 1 to 7, characterized in that the plunger (5) is constructed in several parts. Pumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Pumpe (1) mehrere benachbarte Plunger (5) aufweist und um jeden Plunger (5) Dichtmittel (7) zu einem unteren Gehäuseraum (19) vorgesehen sind.Pump according to one of claims 1 to 8, characterized in that the pump (1) has a plurality of adjacent plungers (5) and around each plunger (5) sealing means (7) are provided to a lower housing space (19). Pumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Pumpe (1) als Hochdruckplungerpumpe ausgebildet ist.Pump according to one of claims 1 to 9, characterized in that the pump (1) is designed as a high-pressure plunger pump.
EP02004477A 2001-05-25 2002-02-27 Piston pump Expired - Lifetime EP1260712B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10125669 2001-05-25
DE10125669A DE10125669B4 (en) 2001-05-25 2001-05-25 Pump, in particular plunger pump

Publications (3)

Publication Number Publication Date
EP1260712A2 true EP1260712A2 (en) 2002-11-27
EP1260712A3 EP1260712A3 (en) 2004-07-21
EP1260712B1 EP1260712B1 (en) 2009-04-01

Family

ID=7686218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02004477A Expired - Lifetime EP1260712B1 (en) 2001-05-25 2002-02-27 Piston pump

Country Status (7)

Country Link
US (1) US6622612B2 (en)
EP (1) EP1260712B1 (en)
JP (1) JP2003028062A (en)
AT (1) ATE427425T1 (en)
AU (1) AU779301B2 (en)
DE (2) DE10125669B4 (en)
ES (1) ES2325148T3 (en)

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DE102006039782B4 (en) * 2006-08-24 2009-04-09 Continental Automotive Gmbh Fluid pump comprising a crank mechanism with undivided connecting rods
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Also Published As

Publication number Publication date
US20020174767A1 (en) 2002-11-28
AU779301B2 (en) 2005-01-13
EP1260712B1 (en) 2009-04-01
DE10125669B4 (en) 2006-04-27
US6622612B2 (en) 2003-09-23
AU3815902A (en) 2002-11-28
ATE427425T1 (en) 2009-04-15
EP1260712A3 (en) 2004-07-21
ES2325148T3 (en) 2009-08-27
DE50213406D1 (en) 2009-05-14
DE10125669A1 (en) 2002-11-28
JP2003028062A (en) 2003-01-29

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