EP3336350A2 - High pressure plunger pump and method for interrupting a fluid flow - Google Patents

High pressure plunger pump and method for interrupting a fluid flow Download PDF

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Publication number
EP3336350A2
EP3336350A2 EP17205242.5A EP17205242A EP3336350A2 EP 3336350 A2 EP3336350 A2 EP 3336350A2 EP 17205242 A EP17205242 A EP 17205242A EP 3336350 A2 EP3336350 A2 EP 3336350A2
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EP
European Patent Office
Prior art keywords
valve
pressure
suction
fluid
hochdruckplungerpumpe
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
EP17205242.5A
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German (de)
French (fr)
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EP3336350B1 (en
EP3336350A3 (en
Inventor
Michael Jarchau
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Hammelmann GmbH
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Hammelmann GmbH
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Priority to PL17205242T priority Critical patent/PL3336350T3/en
Publication of EP3336350A2 publication Critical patent/EP3336350A2/en
Publication of EP3336350A3 publication Critical patent/EP3336350A3/en
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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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • F04B49/246—Bypassing by keeping open the outlet valve
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/02—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0054—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • 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
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/002—Hydraulic systems to change the pump delivery
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/06—Valve parameters
    • F04B2201/0601—Opening times
    • F04B2201/06012—Opening times of the outlet valve only
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1087—Valve seats

Definitions

  • the invention relates to a Hochdruckplungerpumpe according to the preamble of claim 1 and a method for interrupting the operation of a fluid flow.
  • Hochscherplungerpumpen find for the partial processing of different materials use, for example, for roughening metals, for which purpose by means of the Hochlichplungerpumpe a working pressure up to about 4000 bar is generated.
  • This Hochdruckplungerpumpe The essential components of this Hochlichplungerpumpe are an oscillating drivable plunger, which displaces a sucked liquid volume in the working space of the pump, a suction and an outlet valve, which control the liquid flow and the liquid effluent, and a drive device which generates an oscillating motion.
  • a plurality of plunger assemblies each with an oscillating plunger and a suction and pressure valve are operated in parallel. It is through the pressure valve to a hydraulic consumer, eg. A nozzle, leading pressure line and closed by the suction valve a valve seat suction.
  • the fluid flow must be interrupted for a predetermined time within which the workpiece is moved relative to the nozzle.
  • the placement of the rod or its necessary axial mobility requires appropriate sealing measures of the channel relative to the suction chamber, which on the one hand requires a corresponding manufacturing effort and on the other also does not meet the requirements in terms of life.
  • the invention has for its object to further develop a Hochdruckplungerpumpe of the generic type so that it is easier to produce and their life is significantly increased.
  • the counter-pressure device has a supply line via which the fluid is passed directly to the suction valve at low pressure, wherein a low-pressure pump is connected to the supply line for generating pressure of the control fluid, which is in operative connection with a control valve, in its closed position Suction valve is raised or remains in the open position and when opening the counter-pressure device is out of order, so that the suction valve is ready for use.
  • control valve actuation of the control valve by means of a controller, which is correspondingly programmable, depending on the desired pattern of the workpiece to be machined.
  • the suction valves of all plunger arrangements of a high-pressure plunger pump are actuated simultaneously, which takes place via the common control valve or the common low-pressure pump.
  • the supply line for the control fluid is introduced into a valve seat ring, and opens into a control channel in which a pin of the suction valve is guided, said pin acting in the manner of a piston and is connected to a valve cone of the control valve.
  • the invention leads to an optimization of the manufacturing costs as well as to a significant extension of the service life of the Hochdruckplungerpumpe.
  • the pressure valve While the suction valve is open to interrupt the fluid flow, the pressure valve is closed, as well as a shut-off valve associated with the hydraulic consumer, so that the working pressure in the pressure line remains constantly high during the interruption of the fluid flow. It follows that when closing the suction valve and opening the pressure valve and the hydraulic consumer associated with the check valve, the working pressure is available immediately.
  • FIGS. 1 and 2 a head region of a Hochdruckplungerpumpe 21 is shown, with a plunger assembly 1, which has a connected to a valve seat suction 6 and a valve seat pressure line 15 working space 16 in which a plunger 2 is arranged axially movable back and forth, according to the arrow in the FIGS. 1 and 2 ,
  • valve seat pressure line 15 is closed by a pressure valve 4 and the valve seat suction 6 by a suction valve 5, wherein the suction valve 5 is controlled by means of a counter-pressure device 7 as required in an open position preserved.
  • the counterpressure device 7 has a supply line 9, which via a connecting line 10 with a low pressure pump 20 (FIG. FIG. 3 ) is in communication, via which a control fluid on the suction valve 5 can be guided, wherein the connecting line 10 extends between the valve seat suction 6 and the pressure valve.
  • the suction valve 5 has a valve cone which is spring-loaded in the closed position of the suction valve 5 by means of a compression spring 13 against a valve seat of a valve seat ring 3, namely on the plunger 2 side facing.
  • a pin 12 acting in the sense of a piston is connected on the side facing away from the plunger 2, which is axially displaceably guided in a concentric control channel 11 of the valve seat ring 3 and into which the supply line 9 opens, so that the supplied control fluid with pressure on the end face of the pin 12 is applied.
  • the pin 12 and the channel 11 are dimensioned so that there is a low-friction gap seal between the two.
  • FIG. 2 an enlarged detail of the plunger assembly 1 in the region of the valve seat ring 3 is shown.
  • the suction valve 5 is in an open position, ie, the passage between the valve seat suction 6 and the working space 16 is open, wherein the plunger 2 is in an upper dead center.
  • a bottom dead center UT is indicated by dashed lines. Because the strokes of the plunger 2 continuously, the fluid is in a pressure stroke of the plunger 2 in the valve seat suction 6 and thus in a fluid source 22 (FIG. FIG. 3 ) pushed back.
  • control valve 19 is open as well as a check valve 18, which is a hydraulic consumer, in the example of a nozzle 17, immediately upstream, so that on the one hand closes the suction valve 5 due to the now missing control pressure and the pressure valve 4 opens while the pressure fluid through the valve seat pressure line 15th and a pressure line 8 of the nozzle 17 is supplied.
  • the low-pressure pump 20 delivers pressure-less into the fluid source 22 common to the high-pressure plunger pump 21.
  • control 23 is provided which is programmable according to the intervals of the functional interruption of the fluid flow.
  • control valve 19 and the check valve 18 are closed, so that control fluid via the low pressure pump 20 is conveyed into the control channel 11 and the suction valve 5 is kept open according to the closing time of the control valve 19.
  • FIG. 3 In the FIG. 3 are shown in a circuit diagram three plunger assemblies 1 of Hochdruckplungerpumpe 21, the suction valves 5 are simultaneously actuated.
  • the plunger arrangements 1 are designed in such a way that, as a function of the fluid pressure prevailing at the nozzle 17, they remain the same over the entire service life.
  • FIG. 4 is a functional measuring blade of Hochdruckplungerpumpe 21 is shown according to the invention, wherein on the ordinate axis of the operating pressure and on the abscissa axis the operating times are applied.

Abstract

Eine Hochdruckplungerpumpe, mit mindestens einer Plungeranordnung (1), die einen an eine Ventilsitzsaugleitung (6) und eine Ventilsitzdruckleitung (15) angeschlossenen Arbeitsraum (16) aufweist, in dem ein Plunger (2) axial hin und her bewegbar angeordnet ist, wobei die Ventilsitzdruckleitung (15) durch ein Druckventil (4) und die Ventilsitzsaugleitung (6) durch ein Saugventil (5) verschließbar sind und das Saugventil (5) mittels einer Gegendruckeinrichtung (7) bedarfsweise gesteuert in einer Offenstellung haltbar ist, ist so ausgebildet, dass die Gegendruckeinrichtung (7) eine Zuführleitung (9) aufweist, über die zur Offenhaltung des Saugventils (5) ein Steuerfluid auf das Saugventil (5) führbar ist, wobei an die Zuführleitung (9) zur Druckerzeugung des Steuerfluids eine Niederdruckpumpe (20) angeschlossen ist.

Figure imgaf001
A high pressure plunger pump having at least one plunger assembly (1) having a working space (16) connected to a valve seat suction line (6) and a valve seat pressure line (15) in which a plunger (2) is axially reciprocable, the valve seat pressure line (15) by a pressure valve (4) and the valve seat suction line (6) by a suction valve (5) are closable and the suction valve (5) by means of a counter-pressure device (7) as required controlled in an open position, is formed so that the counter-pressure device (7) has a supply line (9) through which a control fluid on the suction valve (5) can be guided for keeping open the suction valve (5), wherein to the supply line (9) for generating pressure of the control fluid, a low-pressure pump (20) is connected.
Figure imgaf001

Description

Die Erfindung eine Hochdruckplungerpumpe nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Funktionsunterbrechung eines Fluidstroms.The invention relates to a Hochdruckplungerpumpe according to the preamble of claim 1 and a method for interrupting the operation of a fluid flow.

Hochdruckplungerpumpen finden zum partiellen Bearbeiten unterschiedlichster Materialien Verwendung, beispielsweise zum Aufrauen von Metallen, wobei hierzu mittels der Hochdruckplungerpumpe ein Arbeitsdruck bis zu etwa 4000 bar erzeugt wird.Hochdruckplungerpumpen find for the partial processing of different materials use, for example, for roughening metals, for which purpose by means of the Hochdruckplungerpumpe a working pressure up to about 4000 bar is generated.

Die wesentlichen Bauteile dieser Hochdruckplungerpumpe sind ein oszillierend antreibbarer Plunger, der ein angesaugtes Flüssigkeitsvolumen im Arbeitsraum der Pumpe verdrängt, ein Saug- und ein Auslassventil, die den Flüssigkeitszustrom und den Flüssigkeitsabstrom steuern, sowie eine Antriebseinrichtung, die eine oszillierende Bewegung erzeugt.The essential components of this Hochdruckplungerpumpe are an oscillating drivable plunger, which displaces a sucked liquid volume in the working space of the pump, a suction and an outlet valve, which control the liquid flow and the liquid effluent, and a drive device which generates an oscillating motion.

Üblicherweise werden zum Antrieb dieser Hochdruckplungerpumpen Rotationsantriebe, insbesondere Elektromotoren oder Verbrennungsmotoren eingesetzt, wobei die Rotationsbewegung durch eine mechanische oder eine hydraulische Umsetzung in eine oszillierende Bewegung umgewandelt wird.Usually, for driving these Hochdruckplungerpumpen rotational drives, in particular electric motors or internal combustion engines are used, wherein the rotational movement is converted by a mechanical or a hydraulic conversion into an oscillating motion.

Zum Ausgleich dynamischer Kräfte, insbesondere zur Verringerung einer Förderstrompulsation, werden mehrere Plungeranordnungen mit jeweils einem oszillierenden Plunger sowie einem Saug- und Druckventil parallel betrieben. Dabei ist durch das Druckventil eine zu einem hydraulischen Verbraucher, bspw. einer Düse, führende Druckleitung und durch das Saugventil eine Ventilsitzsaugleitung verschließbar.To compensate for dynamic forces, in particular for reducing a flow rate pulsation, a plurality of plunger assemblies, each with an oscillating plunger and a suction and pressure valve are operated in parallel. It is through the pressure valve to a hydraulic consumer, eg. A nozzle, leading pressure line and closed by the suction valve a valve seat suction.

Zu dem beispielsweise genannten partiellen Aufrauen eines metallischen Werkstücks, muss der Fluidstrom für eine vorbestimmte Zeit, innerhalb der das Werkstück relativ zur Düse bewegt wird, unterbrochen werden.For example, for the partial roughening of a metallic workpiece, the fluid flow must be interrupted for a predetermined time within which the workpiece is moved relative to the nozzle.

Aus dem Stand der Technik sind hierzu verschiedene konstruktive Lösungen bekannt, beispielsweise solche, die mechanisch auf das Saugventil derart einwirken, dass dies gesteuert für die vorbestimmte Zeit in einer Offenstellung bleibt, so dass der Arbeitsraum zur Saugseite hin frei liegt und kein ausreichender Druck erzeugt wird, um das üblicherweise federbelastete Druckventil zu öffnen.For this purpose, various design solutions are known from the prior art, for example, those that act mechanically on the suction valve so that this remains controlled for the predetermined time in an open position, so that the working space is exposed to the suction side and not sufficient Pressure is generated to open the usually spring-loaded pressure valve.

Zum Stand der Technik wird beispielsweise auf die DE 23 24 746 A verwiesen, in der als Gegendruckeinrichtung zur Funktionsunterbrechung des unter Druck stehenden Fluidstroms eine in der Ventilsitzsaugleitung sowie in einem sich an einen Saugraum anschließenden Kanal geführten Stange vorgeschlagen wird, die mittels eines Magneten betätigbar ist, um das Saugventil in einer Offenstellung zu halten.The state of the art, for example, on the DE 23 24 746 A referenced in which as a counter-pressure device for interrupting the function of the pressurized fluid flow in the valve seat suction and in a subsequent channel adjacent to a suction channel rod is proposed, which is actuated by a magnet to hold the suction valve in an open position.

Sowohl von der fertigungstechnischen Seite her wie auch hinsichtlich der Standzeit ist diese bekannte Hochdruckplungerpumpe mit erheblichen Nachteilen behaftet, die einen optimierten Einsatz nicht zulässt.Both from the manufacturing side as well as in terms of service life, this known Hochdruckplungerpumpe is associated with significant disadvantages that does not allow an optimized use.

Die funktionsbedingten häufigen Schaltzyklen, wie sie bei dem genannten Einsatz zwingend sind, führen zu einem hohen Verschleiß sowohl des Magneten wie auch der Stange selbst, so dass relativ häufige, reparaturbedingte Betriebsunterbrechungen die Folge sind.The function-related frequent switching cycles, as they are mandatory in the said use, lead to high wear of both the magnet and the rod itself, so that relatively frequent, repair-related business interruptions are the result.

Darüber hinaus erfordert die Platzierung der Stange bzw. deren notwendige axiale Bewegbarkeit entsprechende Dichtungsmaßnahmen des Kanals gegenüber dem Saugraum, was zum einen einen entsprechenden Fertigungsaufwand erfordert und zum anderen gleichfalls hinsichtlich der Standzeit den Ansprüchen nicht genügt.In addition, the placement of the rod or its necessary axial mobility requires appropriate sealing measures of the channel relative to the suction chamber, which on the one hand requires a corresponding manufacturing effort and on the other also does not meet the requirements in terms of life.

Dies trifft gleichermaßen auf eine Konstruktion zu, die in der EP 1 998 045 A1 offenbart ist. Zur Haltung des Saugventils in einer Offenstellung, d.h. für eine Saugventilanhebung wird in dieser Literatur die Anordnung von Druckstößeln vorgeschlagen, die auf das Saugventil einwirken.This applies equally to a construction that in the EP 1 998 045 A1 is disclosed. For keeping the suction valve in an open position, ie for a Saugventilanhebung the arrangement of plungers is proposed in this literature, which act on the suction valve.

Aus der DE 699 19 567 T2 ist eine gattungsfremde Bremsstoffeinspritzeinrichtung bekannt, mit einem Einspritzventil, das im Betrieb ein Förderfluid in Form von Kraftstoff im Takt eines Verbrennungsmotors unterbricht und diesen, je nach Belastung des Motors, variiert. Dazu sind ein Verstärkerkolben für die Betätigung und eine Ventilnadel als Schließorgan erforderlich, wobei für dessen Betätigung ein gegenüber dem Förderfluid anderes Betätigungsfluid verwandt wird.From the DE 699 19 567 T2 is a generic type of brake injector known, with an injection valve, which interrupts a fluid during operation in the form of fuel to the beat of an internal combustion engine and this, depending on the load of the engine, varies. For this purpose, a booster piston for the operation and a valve needle as a closing member are required, for the actuation of which a relative to the conveying fluid other actuating fluid is used.

Der Erfindung liegt die Aufgabe zugrunde, eine Hochdruckplungerpumpe der gattungsgemäßen Art so weiterzuentwickeln, dass sie einfacher herstellbar ist und ihre Standzeit deutlich erhöht wird.The invention has for its object to further develop a Hochdruckplungerpumpe of the generic type so that it is easier to produce and their life is significantly increased.

Diese Aufgabe wird durch eine Hochdruckplungerpumpe mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren zur Funktionsunterbrechung eines Fluidstroms gelöst.This object is achieved by a Hochdruckplungerpumpe with the features of claim 1 and by a method for interrupting the operation of a fluid flow.

Während im beschriebenen Stand der Technik, bei dem die Gegendruckeinrichtung, mit der das Saugventil bedarfsweise gesteuert offengehalten wird, rein mechanisch wirksam ist, durch die erwähnte magnetbetätigte Stange bzw. durch Druckstößel, wird der Gegendruck auf das Saugventil zu dessen Anhebung auch bei einem Druckhub des zugeordneten Plungers, rein hydraulisch durch ein Steuerfluid erreicht, das bevorzugt gleichartig dem Druckfluid entspricht, üblicherweise Wasser.While in the described prior art, in which the counter-pressure device with which the suction valve is controlled as required kept open, purely mechanically effective, by the mentioned solenoid-operated rod or by plunger, the back pressure on the suction valve to its increase even at a pressure stroke of associated plunger, purely hydraulically achieved by a control fluid, which preferably similar to the pressure fluid corresponds, usually water.

Gemäß der erfindungsgemäßen Hochdruckplungerpumpe weist hierzu die Gegendruckeinrichtung eine Zuführleitung auf, über die das Fluid mit Niederdruck unmittelbar auf das Saugventil geführt wird, wobei an die Zuführleitung zur Druckerzeugung des Steuerfluids eine Niederdruckpumpe angeschlossen ist, die mit einem Steuerventil in Wirkverbindung steht, in dessen Schließstellung das Saugventil angehoben wird bzw. in Offenstellung bleibt und bei Öffnung die Gegendruckeinrichtung außer Funktion ist, so dass das Saugventil betriebsbereit ist.According to the high-pressure plunger pump according to the invention, the counter-pressure device has a supply line via which the fluid is passed directly to the suction valve at low pressure, wherein a low-pressure pump is connected to the supply line for generating pressure of the control fluid, which is in operative connection with a control valve, in its closed position Suction valve is raised or remains in the open position and when opening the counter-pressure device is out of order, so that the suction valve is ready for use.

Dabei erfolgt die Betätigung des Steuerventils mittels einer Steuerung, die, je nach gewünschtem Muster des zu bearbeitenden Werkstücks entsprechend programmierbar ist.In this case, the actuation of the control valve by means of a controller, which is correspondingly programmable, depending on the desired pattern of the workpiece to be machined.

Zur Unterbrechung des Fluidstroms werden die Saugventile aller Plungeranordnungen einer Hochdruckplungerpumpe gleichzeitig betätigt, was über das gemeinsame Steuerventil bzw. die gemeinsame Niederdruckpumpe erfolgt.To interrupt the fluid flow, the suction valves of all plunger arrangements of a high-pressure plunger pump are actuated simultaneously, which takes place via the common control valve or the common low-pressure pump.

Nach einem weiteren Gedanken der Erfindung ist die Zuführleitung für das Steuerfluid in einen Ventilsitzring eingebracht, und mündet in einen Steuerkanal, in dem ein Zapfen des Saugventils geführt ist, wobei dieser Zapfen im Sinne eines Kolbens fungiert und an einen Ventilkegel des Steuerventils angeschlossen ist.According to a further aspect of the invention, the supply line for the control fluid is introduced into a valve seat ring, and opens into a control channel in which a pin of the suction valve is guided, said pin acting in the manner of a piston and is connected to a valve cone of the control valve.

Da die Gegendruckeinrichtung nunmehr im Wesentlichen ohne mechanisch wirkende Bauteile auskommt, führt die Erfindung zu einer Optimierung der Fertigungskosten ebenso wie zu einer deutlichen Verlängerung der Standzeit der Hochdruckplungerpumpe.Since the counter-pressure device now essentially manages without mechanically acting components, the invention leads to an optimization of the manufacturing costs as well as to a significant extension of the service life of the Hochdruckplungerpumpe.

Hierzu trägt auch bei, dass auf hermetische Dichtungen der Gegendruckeinrichtung gegenüber dem Arbeitsraum vollständig verzichtet werden kann, insbesondere, da, wie erwähnt, als Steuerfluid das artgleiche Druckfluid genutzt wird. Diese werden bevorzugt aus einer gemeinsamen Fluidquelle bezogen.This is also contributed to that can be completely dispensed with hermetic seals of the counter-pressure device relative to the working space, in particular, since, as mentioned, the same type of pressurized fluid is used as the control fluid. These are preferably obtained from a common fluid source.

Während das Saugventil zur Unterbrechung des Fluidstroms geöffnet ist, ist das Druckventil geschlossen, ebenso wie ein dem hydraulischen Verbraucher zugeordnetes Sperrventil, so dass der Arbeitsdruck in der Druckleitung während der Funktionsunterbrechung des Fluidstroms konstant hoch bleibt. Daraus ergibt sich, dass beim Schließen des Saugventils und Öffnen des Druckventils sowie des dem hydraulischen Verbraucher zugeordneten Sperrventils der Arbeitsdruck unmittelbar zur Verfügung steht.While the suction valve is open to interrupt the fluid flow, the pressure valve is closed, as well as a shut-off valve associated with the hydraulic consumer, so that the working pressure in the pressure line remains constantly high during the interruption of the fluid flow. It follows that when closing the suction valve and opening the pressure valve and the hydraulic consumer associated with the check valve, the working pressure is available immediately.

Wie bei den aus dem Stand der Technik bekannten Verfahren tritt auch bei dem neuen Verfahren eine die Standzeit der beteiligten Bauteile beeinträchtigende Schwellbeanspruchung nicht auf.As in the case of the methods known from the prior art, a threshold stress which impairs the service life of the components involved also does not occur in the new method.

Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.

Ein Ausführungsbeispiel einer Hochdruckplungerpumpe nach der Erfindung sowie das neue Verfahren werden nachfolgend anhand der beigefügten Zeichnung beschrieben.An embodiment of a Hochdruckplungerpumpe according to the invention and the new method will be described below with reference to the accompanying drawings.

Es zeigen:

Fig. 1
einen Teilausschnitt einer Hochdruckplungerpumpe in einem Längsschnitt
Fig. 2
einen Teilausschnitt der Abbildung in Fig. 1 in einer vergrößerten Darstellung
Fig. 3
ein Schemabild der Hochdruckplungerpumpe
Fig. 4
ein Funktions-Messblatt der Hochdruckplungerpumpe.
Show it:
Fig. 1
a partial section of a Hochdruckplungerpumpe in a longitudinal section
Fig. 2
a partial section of the figure in Fig. 1 in an enlarged view
Fig. 3
a schematic of the Hochdruckplungerpumpe
Fig. 4
a functional measuring sheet of the high-pressure plunger pump.

In den Figuren 1 und 2 ist ein Kopfbereich einer Hochdruckplungerpumpe 21 abgebildet, mit einer Plungeranordnung 1, die einen an eine Ventilsitzsaugleitung 6 und eine Ventilsitzdruckleitung 15 angeschlossenen Arbeitsraum 16 aufweist, in dem ein Plunger 2 axial hin und her bewegbar angeordnet ist, entsprechend der Pfeilangabe in den Figuren 1 und 2.In the FIGS. 1 and 2 a head region of a Hochdruckplungerpumpe 21 is shown, with a plunger assembly 1, which has a connected to a valve seat suction 6 and a valve seat pressure line 15 working space 16 in which a plunger 2 is arranged axially movable back and forth, according to the arrow in the FIGS. 1 and 2 ,

Die Ventilsitzdruckleitung 15 ist durch ein Druckventil 4 und die Ventilsitzsaugleitung 6 durch ein Saugventil 5 verschließbar, wobei das Saugventil 5 mittels einer Gegendruckeinrichtung 7 bedarfsweise gesteuert in einer Offenstellung haltbar ist.The valve seat pressure line 15 is closed by a pressure valve 4 and the valve seat suction 6 by a suction valve 5, wherein the suction valve 5 is controlled by means of a counter-pressure device 7 as required in an open position preserved.

Gemäß der Erfindung weist die Gegendruckeinrichtung 7 eine Zuführleitung 9 auf, die über eine Anschlussleitung 10 mit einer Niederdruckpumpe 20 (Figur 3) in Verbindung steht, über die ein Steuerfluid auf das Saugventil 5 führbar ist, wobei die Anschlussleitung 10 zwischen der Ventilsitzsaugleitung 6 und dem Druckventil verläuft.According to the invention, the counterpressure device 7 has a supply line 9, which via a connecting line 10 with a low pressure pump 20 (FIG. FIG. 3 ) is in communication, via which a control fluid on the suction valve 5 can be guided, wherein the connecting line 10 extends between the valve seat suction 6 and the pressure valve.

Das Saugventil 5 weist einen Ventilkegel auf, der in Schließstellung des Saugventils 5 mittels einer Druckfeder 13 federbelastet an einem Ventilsitz eines Ventilsitzringes 3 dicht anliegt und zwar auf der dem Plunger 2 zugewandten Seite.The suction valve 5 has a valve cone which is spring-loaded in the closed position of the suction valve 5 by means of a compression spring 13 against a valve seat of a valve seat ring 3, namely on the plunger 2 side facing.

An den Ventilkegel des Saugventils 5 ist auf der dem Plunger 2 abgewandten Seite ein im Sinne eines Kolbens fungierender Zapfen 12 angeschlossen, der in einem konzentrischen Steuerkanal 11 des Ventilsitzringes 3 axial verschiebbar geführt ist und in den die Zuführleitung 9 mündet, so dass das zugeführte Steuerfluid mit Druck an der Stirnfläche des Zapfens 12 anliegt. Dabei sind der Zapfen 12 und der Kanal 11 so bemessen, dass sich zwischen beiden eine reibungsarme Spaltdichtung ergibt.On the valve cone of the suction valve 5, a pin 12 acting in the sense of a piston is connected on the side facing away from the plunger 2, which is axially displaceably guided in a concentric control channel 11 of the valve seat ring 3 and into which the supply line 9 opens, so that the supplied control fluid with pressure on the end face of the pin 12 is applied. The pin 12 and the channel 11 are dimensioned so that there is a low-friction gap seal between the two.

In der Figur 2 ist ein vergrößerter Ausschnitt der Plungeranordnung 1 im Bereich des Ventilsitzringes 3 abgebildet.In the FIG. 2 an enlarged detail of the plunger assembly 1 in the region of the valve seat ring 3 is shown.

Es ist zu erkennen, dass sich das Saugventil 5 in einer Offenstellung befindet, d.h., der Durchgang zwischen der Ventilsitzsaugleitung 6 und dem Arbeitsraum 16 ist offen, wobei sich der Plunger 2 in einer oberen Totlage befindet. Eine untere Totlage UT ist gestrichelt angedeutet. Da die Hubbewegungen des Plungers 2 ununterbrochen erfolgen, wird das Fluid bei einem Druckhub des Plungers 2 in die Ventilsitzsaugleitung 6 und damit in eine Fluidquelle 22 (Figur 3) zurückgedrückt.It can be seen that the suction valve 5 is in an open position, ie, the passage between the valve seat suction 6 and the working space 16 is open, wherein the plunger 2 is in an upper dead center. A bottom dead center UT is indicated by dashed lines. Because the strokes of the plunger 2 continuously, the fluid is in a pressure stroke of the plunger 2 in the valve seat suction 6 and thus in a fluid source 22 (FIG. FIG. 3 ) pushed back.

Während das Saugventil 5 offen ist und über das Steuerfluid eine vorbestimmte Zeit offen bleibt und zwar gegen den Druck der Druckfeder 13, verschließt das Druckventil 4 durch den in der Druckleitung 8 unter Druck anstehenden Fluidstrom mit Unterstützung einer Druckfeder 14 die Ventilsitzdruckleitung 15.While the suction valve 5 is open and remains open over the control fluid for a predetermined time and against the pressure of the compression spring 13, the pressure valve 4 closes the pressure in the pressure line 8 under pressure pending fluid flow with the assistance of a compression spring 14, the valve seat pressure line 15th

Zur Beendigung der Funktionsunterbrechung des Fluidstroms wird sowohl ein in der Figur 3 erkennbares Steuerventil 19 geöffnet wie auch ein Sperrventil 18, das einem hydraulischen Verbraucher, im Beispiel einer Düse 17, unmittelbar vorgeschaltet ist, so dass zum einen das Saugventil 5 aufgrund des nun fehlenden Steuerdrucks schließt und das Druckventil 4 öffnet während das Druckfluid über die Ventilsitzdruckleitung 15 und eine Druckleitung 8 der Düse 17 zugeführt wird.To terminate the functional interruption of the fluid flow is both in the FIG. 3 recognizable control valve 19 is open as well as a check valve 18, which is a hydraulic consumer, in the example of a nozzle 17, immediately upstream, so that on the one hand closes the suction valve 5 due to the now missing control pressure and the pressure valve 4 opens while the pressure fluid through the valve seat pressure line 15th and a pressure line 8 of the nozzle 17 is supplied.

Während dieser sozusagen Funktionszeit des Fluidstroms fördert die Niederdruckpumpe 20 drucklos in die mit der Hochdruckplungerpumpe 21 gemeinsame Fluidquelle 22.During this so-called functional time of the fluid flow, the low-pressure pump 20 delivers pressure-less into the fluid source 22 common to the high-pressure plunger pump 21.

Zur gleichzeitigen Schaltung des Steuerventils 19 und des Sperrventils 18 ist eine gleichfalls in der Figur 3 erkennbare Steuerung 23 vorgesehen, die entsprechend den Intervallen der Funktionsunterbrechung des Fluidstroms programmierbar ist.For simultaneous switching of the control valve 19 and the check valve 18 is also in the FIG. 3 recognizable control 23 is provided which is programmable according to the intervals of the functional interruption of the fluid flow.

Zur Funktionsunterbrechung werden demzufolge gleichzeitig das Steuerventil 19 und das Sperrventil 18 geschlossen, so dass Steuerfluid über die Niederdruckpumpe 20 in den Steuerkanal 11 gefördert und das Saugventil 5 entsprechend der Schließzeit des Steuerventils 19 offengehalten bleibt.For functional interruption, therefore, simultaneously the control valve 19 and the check valve 18 are closed, so that control fluid via the low pressure pump 20 is conveyed into the control channel 11 and the suction valve 5 is kept open according to the closing time of the control valve 19.

In der Figur 3 sind in einem Schaltbild drei Plungeranordnungen 1 der Hochdruckplungerpumpe 21 abgebildet, deren Saugventile 5 gleichzeitig betätigbar sind. In an sich bekannter Weise sind dabei die Plungeranordnungen 1 so ausgelegt, dass in Funktion der an der Düse 17 anstehende Fluiddruck über die gesamte Funktionsdauer gleich bleibt.In the FIG. 3 are shown in a circuit diagram three plunger assemblies 1 of Hochdruckplungerpumpe 21, the suction valves 5 are simultaneously actuated. In a manner known per se, the plunger arrangements 1 are designed in such a way that, as a function of the fluid pressure prevailing at the nozzle 17, they remain the same over the entire service life.

In der Figur 4 ist ein Funktions-Messblatt der Hochdruckplungerpumpe 21 nach der Erfindung abgebildet, wobei auf der Ordinatenachse der Betriebsdruck und auf der Abszissenachse die Betriebszeiten angetragen sind.In the FIG. 4 is a functional measuring blade of Hochdruckplungerpumpe 21 is shown according to the invention, wherein on the ordinate axis of the operating pressure and on the abscissa axis the operating times are applied.

Mit F ist die Funktionsdauer erkennbar, in der das Fluid mit einem Druck von etwa 3400 bar über einen Zeitraum von etwa 0,6 sec. anliegt.With F, the functional life is recognizable, in which the fluid is applied at a pressure of about 3400 bar over a period of about 0.6 sec.

Danach wird die Funktion des Fluidstroms unterbrochen über einen Zeitraum NF, in dem das Saugventil 5 geöffnet ist.Thereafter, the function of the fluid flow is interrupted over a period NF, in which the suction valve 5 is opened.

In der Figur 4 ist erkennbar, dass in der Zeitspanne NF in der Druckleitung 8 der gleiche Fluiddruck ansteht wie in der Funktions-Zeitspanne F, nämlich etwa 3400 bar.In the FIG. 4 can be seen that in the period NF in the pressure line 8, the same fluid pressure is present as in the functional period F, namely about 3400 bar.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Plungeranordnungplunger assembly
22
Plungerplunger
33
VentilsitzringValve seat ring
44
Druckventilpressure valve
55
Saugventilsuction
66
VentilsitzsaugleitungVentilsitzsaugleitung
77
GegendruckeinrichtungCounter-pressure device
88th
Druckleitungpressure line
99
Zuführleitungfeed
1010
Anschlussleitungconnecting cable
1111
Steuerkanalcontrol channel
1212
Zapfenspigot
1313
Druckfedercompression spring
1414
Druckfedercompression spring
1515
VentilsitzdruckleitungValve seat pressure line
1616
Arbeitsraumworking space
1717
Düsejet
1818
Sperrventilcheck valve
1919
Steuerventilcontrol valve
2020
NiederdruckpumpeLow pressure pump
2121
Hochdruckplungerpumpehigh-pressure plunger
2222
Fluidquellefluid source
2323
Steuerungcontrol

Claims (14)

Hochdruckplungerpumpe, mit mindestens einer Plungeranordnung (1), die einen an eine Ventilsitzsaugleitung (6) und eine Ventilsitzdruckleitung (15) angeschlossenen Arbeitsraum (16) aufweist, in dem ein Plunger (2) axial hin und her bewegbar angeordnet ist, wobei die Ventilsitzdruckleitung (15) durch ein Druckventil (4) und die Ventilsitzsaugleitung (6) durch ein Saugventil (5) verschließbar sind und das Saugventil (5) mittels einer Gegendruckeinrichtung (7) bedarfsweise gesteuert in einer Offenstellung haltbar ist, dadurch gekennzeichnet, dass die Gegendruckeinrichtung (7) eine Zuführleitung (9) aufweist, über die zur Offenhaltung des Saugventils (5) ein Steuerfluid auf das Saugventil (5) führbar ist, wobei an die Zuführleitung (9) zur Druckerzeugung des Steuerfluids eine Niederdruckpumpe (20) angeschlossen ist.High-pressure plunger pump, having at least one plunger arrangement (1) which has a working chamber (16) connected to a valve seat suction line (6) and a valve seat pressure line (15), in which a plunger (2) is arranged axially reciprocally movable, wherein the valve seat pressure line ( 15) by a pressure valve (4) and the Ventilsitzsaugleitung (6) by a suction valve (5) are closable and the suction valve (5) by means of a counter-pressure device (7) as required controlled in an open position, characterized in that the counter-pressure device (7 ) has a supply line (9) through which a control fluid on the suction valve (5) can be guided for keeping open the suction valve (5), wherein to the supply line (9) for generating pressure of the control fluid, a low-pressure pump (20) is connected. Hochdruckplungerpumpe nach Anspruch 1, dadurch gekennzeichnet, dass der Niederdruckpumpe (20) ein Steuerventil (19) und einem mit der Ventilsitzdruckleitung (15) in Verbindung stehenden hydraulischen Verbraucher ein Sperrventil (18) vorgeschaltet sind, die zur Funktionsunterbrechung eines aus dem hydraulischen Verbraucher austretenden Fluidstroms gleichzeitig verschließbar sind.Hochdruckplungerpumpe according to claim 1, characterized in that the low pressure pump (20) a control valve (19) and connected to the valve seat pressure line (15) hydraulic consumers a shut-off valve (18) are connected upstream of the function interruption of an emerging from the hydraulic consumer fluid flow are closed at the same time. Hochdruckplungerpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Steuerventil (19) und das Sperrventil (18) über eine vorzugsweise programmierbare Steuerung (23) betätigbar sind.Hochdruckplungerpumpe according to claim 1 or 2, characterized in that the control valve (19) and the check valve (18) via a preferably programmable controller (23) are actuated. Hochdruckplungerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Saugseite der Niederdruckpumpe (20) und die Saugseite der Hochdruckplungerpumpe (21) mit einer gemeinsamen Fluidquelle (22) verbunden sind.Hochdruckplungerpumpe according to any one of the preceding claims, characterized in that the suction side of the low pressure pump (20) and the suction side of the Hochdruckplungerpumpe (21) are connected to a common fluid source (22). Hochdruckplungerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zuführleitung (9) in einen Steuerkanal (11) mündet, in dem ein Zapfen (15) des Saugventils (5) axial verschiebbar geführt ist, wobei das Steuerfluid an der freien Stirnseite des als Kolben fungierenden Zapfens (12) mit Niederdruck anliegt.Hochdruckplungerpumpe according to any one of the preceding claims, characterized in that the supply line (9) opens into a control channel (11) in which a pin (15) of the suction valve (5) is guided axially displaceable, wherein the control fluid at the free end face of the Piston acting pin (12) is applied with low pressure. Hochdruckplungerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Druckkraft des Steuerfluids größer ist als die Federkraft einer Druckfeder (13), mit der das Saugventil (5) gegen einen Ventilsitz pressbar ist.Hochdruckplungerpumpe according to any one of the preceding claims, characterized in that the pressure force of the control fluid is greater as the spring force of a compression spring (13) with which the suction valve (5) can be pressed against a valve seat. Hochdruckplungerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen dem Zapfen (12) und der Wandung des Kanales (11) eine Spaltdichtung gebildet ist.Hochdruckplungerpumpe according to any one of the preceding claims, characterized in that between the pin (12) and the wall of the channel (11) a gap seal is formed. Hochdruckplungerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zuführleitung (9), der Steuerkanal (11), die Ventilsitzsaugleitung (6) und die Ventilsitzdruckleitung (15) in einem Ventilsitzring (3) vorgesehen sind, wobei das Saugventil (5) auf der dem zugeordneten Plunger (2) zugewandten Seite und das Druckventil (4) auf der gegenüberliegenden Seite am Ventilsitzring (3) federbelastet anlegbar sind.Hochdruckplungerpumpe according to any one of the preceding claims, characterized in that the supply line (9), the control channel (11), the Ventilsitzsaugleitung (6) and the valve seat pressure line (15) are provided in a valve seat ring (3), wherein the suction valve (5) the associated plunger (2) facing side and the pressure valve (4) on the opposite side of the valve seat ring (3) are spring-loaded applied. Verfahren zur Funktionsunterbrechung eines aus einem hydraulischen Verbraucher einer Hochdruckplungerpumpe (21) austretenden Fluidstroms, bei dem ein axial bewegbares Saugventil (5) bedarfsweise gesteuert und unabhängig von der Position des zugeordneten Plungers (2) in einer Offenstellung gehalten wird, dadurch gekennzeichnet, dass das Saugventil (5) hydraulisch in der bedarfsweise gesteuerten Offenstellung gehalten wird.Method for interrupting the function of a fluid flow leaving a hydraulic consumer of a high-pressure plunger pump (21), in which an axially movable suction valve (5) is controlled as required and kept in an open position independently of the position of the associated plunger (2), characterized in that the suction valve (5) is held hydraulically in the demand-controlled open position. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass als Steuerfluid als ein zum Druckfluid gleichartiges Fluid eingesetzt wird.A method according to claim 9, characterized in that is used as a control fluid as a fluid similar to the pressure fluid. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass das Steuerfluid und das Druckfluid aus einer gemeinsamen Fluidquelle (22) bezogen werden.A method according to claim 9 or 10, characterized in that the control fluid and the pressure fluid from a common fluid source (22) are obtained. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass während der Funktionsunterbrechung eine Düsenzuleitung (8) einerseits durch das Druckventil (4) und andererseits durch ein einem hydraulischer Verbrauche, bspw. einer Düse (17) zugeordnetes Sperrventil (18) unter Beibehaltung des Arbeitsdrucks verschlossen wird.Method according to one of claims 9 to 11, characterized in that during the interruption of a nozzle supply line (8) on the one hand by the pressure valve (4) and on the other hand by a hydraulic consumption, eg. A nozzle (17) associated with shut-off valve (18) while maintaining the working pressure is closed. Verfahren nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass ein Steuerventil (19), mit dem ein auf das Saugventil (5) wirkendes Steuerfluid zuschaltbar ist, und das Sperrventil (18) während der Funktionsunterbrechung des Fluidstroms zeitgleich geschlossen werden und geschlossen bleiben.Method according to one of Claims 9 to 12, characterized in that a control valve (19) with which a control fluid acting on the suction valve (5) can be engaged, and the check valve (18) during the functional interruption the fluid flow are closed at the same time and remain closed. Verfahren nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, dass bei Anordnung mehrerer jeweils einem Plunger (2) zugeordneter Saugventile (5) diese zur Funktionsunterbrechung des Fluidstroms gleichzeitig in eine Offenstellung gebracht und gehalten werden und geschlossen bleiben.Method according to one of claims 9 to 13, characterized in that when a plurality of each of a plunger (2) associated with suction valves (5) these are brought simultaneously to the functional interruption of the fluid flow in an open position and kept closed.
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EP3336350B1 (en) 2019-10-09
DE102016124422A1 (en) 2018-06-14
PL3336350T3 (en) 2020-03-31
US20180163717A1 (en) 2018-06-14
EP3336350A3 (en) 2018-08-15

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