EP1985853A1 - Radial piston pump, in particular for Common Rail (CR) injection systems - Google Patents

Radial piston pump, in particular for Common Rail (CR) injection systems Download PDF

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Publication number
EP1985853A1
EP1985853A1 EP08103432A EP08103432A EP1985853A1 EP 1985853 A1 EP1985853 A1 EP 1985853A1 EP 08103432 A EP08103432 A EP 08103432A EP 08103432 A EP08103432 A EP 08103432A EP 1985853 A1 EP1985853 A1 EP 1985853A1
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EP
European Patent Office
Prior art keywords
pump
cylinder
piston
plunger
radial piston
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
EP08103432A
Other languages
German (de)
French (fr)
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EP1985853B1 (en
Inventor
Hermann Dr.-Ing. Golle
Ronny Menzel
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.)
Golle Motor GmbH
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Golle Motor AG
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Filing date
Publication date
Application filed by Golle Motor AG filed Critical Golle Motor AG
Publication of EP1985853A1 publication Critical patent/EP1985853A1/en
Application granted granted Critical
Publication of EP1985853B1 publication Critical patent/EP1985853B1/en
Not-in-force legal-status Critical Current
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Classifications

    • 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
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons
    • 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
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails
    • F02M63/027—More than one high pressure pump feeding a single common rail

Definitions

  • the invention relates to a radial piston pump, as it is used to act on the pressure accumulator in CR systems for diesel and gasoline engines.
  • a particular problem in this case represent the transmission elements from centrally located eccentric pin to the hubausorderden piston.
  • an eccentric ring is held on the eccentric pin, which is provided with flats for the piston shoes (piston feet).
  • the invention is therefore based on the object to provide the known systems with flat sliding surfaces and high friction forces even with the cylindrical bearings a new improved transmission system. Further improvements include pump design, the valve assemblies and other detailed solutions to the invention task.
  • This object is achieved in that a tilting pad superimposed on an eccentric pin and a pivot bearing is connected to a piston actuating plunger.
  • the tilting segment floats to form a liquid wedge on the eccentric pin, any transverse sliding is avoided.
  • the Fig. 1 shows a pump housing 1 with, for example, three piston / cylinder units, each consisting of a cylinder 2 and a piston 3 and are in operative connection with a plunger 4, a tilting segment 5 and a central eccentric pin 6. Between the plunger 4 and the tilting segment 5, a pivot bearing 7 is arranged.
  • the piston 3 is connected to the plunger 4 in a known manner fixed or hinged and a coil spring 8, which is arranged between the plunger 4 and the cylinder 2, ensures the return stroke of the moving system piston 3 / plunger. 4
  • the pumping stroke takes place during rotation of the eccentric pin 6 from the tilting segment 5 via the rotary joint 7 to the system piston 3 / plunger 4.
  • the tilting segment 5 is a hydrodynamic Kippsegmentlager, z. B. according to DIN 31657 / 1-4, trained and ensures full hydrodynamic lubrication with increasing pump speed.
  • the radius of the tilting pad is larger by a certain amount than the pin radius, so that a liquid wedge is built up quickly and effectively while tilting the eccentrically mounted segment.
  • a sliding bearing material of known type may be connected to the running surface of the tilting segment 5 because of the mixing friction occurring when the pump starts up.
  • a further embodiment of the pump according to the invention is characterized in that the suction and pressure control elements are arranged directly in the cylinder 2.
  • the suction valve 9, for example, designed as a spring-loaded plate valve and connected via suction holes 10 with the vorgeruckbeetzmannten Pumpeninnnraum 11 is also part of the cylinder 2 as the pressure valve 12, which is connected via pressure holes 13 to the central channel 14, which receives the pressure flows of all pump elements.
  • the transition point 15, designed pressure-tight by known and proven elements, is the only required sealing point between the cylinder 2 and the pump housing 1. All other seals such as lapped plan surfaces, special seals u. Like. omitted, so that particularly strong contact forces of the cylinder 2 on the pump housing 1 are not required. For example, with 7 mm piston diameter and 2500 bar pump pressure, four screws 16 of size M6 are sufficient to adequately secure the cylinders 2.
  • the Fig. 2 shows the cylinder 2 used in the pump housing 1 including the piston 3, plunger 4, tilting segment 5, pivot bearing 7, and the driving eccentric. 6
  • the side windows 17 further support the construction and maintenance of the liquid wedge under the tilting segment 5, by hindering as boundary walls, the lateral outflow of the medium from the liquid wedge.
  • a housing cover 18 inserted in the pump housing 1 forms the lateral end of the pump and gives the parts eccentric pin 6, tilting segment 5 and the side windows 17 an axial guidance.
  • the Fig. 3 shows as a section of Fig. 1 the execution of the pivot bearing as a shaft piece 7, which is inserted between the tilting segment 5 and the plunger 4.
  • This shaft piece 7 then also has the guide pin 5a, which engage in the side windows 17, such as Fig. 4 shows.
  • the Fig. 5 shows in a further embodiment of the invention, the embodiment of the plunger 4 as a U-shaped prismatic part.
  • This U-shaped plunger 4 then cooperates with the neck of the cylinder 2 such that this neck is not of circular shape, but has two parallel sliding surfaces 19. Instead of the coil spring 8 then two flat springs 20 occur.
  • the invention describes a suitable for high mass production, inexpensive and low-friction high-pressure pump. It is not yet equipped with a regulation of the delivery volume. Preferably, the pump should be equipped with a precise, based on stroke adjustment, the applicant protected flow control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The radial piston pump for common rail injection systems has an eccentric shaft (6), around which tipping segments (5) are fitted which are pivoted on plungers (4) connected to the pump pistons (3). As they tip liquid wedges are formed on which they float. The combination of cylinder (2), piston, piston rod, helical spring, leaf spring and valves (9, 10) is fitted as a single sealed unit in the pump casing (1).

Description

Die Erfindung betrifft eine Radialkolbenpumpe, wie sie zur Beaufschlagung des Druckspeichers bei CR-Systemen für Diesel- und Ottomotoren eingesetzt wird.The invention relates to a radial piston pump, as it is used to act on the pressure accumulator in CR systems for diesel and gasoline engines.

Solche Pumpen sind in mehreren und bewährten Ausführungen bekannt, sie bedürfen jedoch im Hinblick auf verringerte Reibleistung und höhere Standfestigkeit, aber auch preiswerte Fertigung weiterer Verbesserungen.Such pumps are known in several and proven designs, but they require in view of reduced friction and higher stability, but also inexpensive production further improvements.

Dies ist besonders wichtig, weil die Ansprüche an solche Pumpen, insbes. nach höheren Drücken und Drehzahlen, ständig ansteigen.This is particularly important because the demands on such pumps, esp. For higher pressures and speeds, constantly increasing.

Ein besonderes Problem stellen dabei die Übertragungselemente vom zentral angeordneten Exzenterzapfen zu den hubausführenden Kolben dar.A particular problem in this case represent the transmission elements from centrally located eccentric pin to the hubausführenden piston.

Bei den meisten bekannten Ausführungen ist auf dem Exzenterzapfen ein Exzenterring gehalten, welcher mit Abflachungen für die Kolbenschuhe (Kolbenfüße) versehen ist.In most known embodiments, an eccentric ring is held on the eccentric pin, which is provided with flats for the piston shoes (piston feet).

Beim Betrieb treten dabei erhebliche quer zur Kolbenachse wirkende Reibungskräfte auf, welche die Reibleistung erhöhen und die Lebensdauer beeinträchtigen.During operation, considerable frictional forces acting transversely to the piston axis occur, which increase the friction loss and impair the service life.

Zur Vermeidung dieser Mängel wird z. B. in der DE 102 47 645 A1 vorgeschlagen, Schmiertaschen auf dem Exzenterring (Polygonring) anzuordnen, um die Gleitreibung zu verringern.To avoid these shortcomings z. B. in the DE 102 47 645 A1 proposed to arrange lubrication pockets on the eccentric ring (polygon ring) to reduce the sliding friction.

In der DE 198 29 547 A1 wird vorgeschlagen, den Polygonring in mehrere Segmente zu unterteilen, wobei jedem Kolbenfuß ein entsprechendes Segment zugeordnet ist. Dabei weicht die Gestaltung des einzelnen Segmentes nicht vom geschlossenen Polygonring ab, auch das nachteilige Gleiten des Kolbenfußes bleibt bestehen. Somit ergeben sich bezüglich Reibung am Exzenterzapfen und Quergleiten des Kolbenfußes keine Verbesserungen.In the DE 198 29 547 A1 It is proposed to divide the polygon ring into several segments, each piston foot being associated with a corresponding segment. The design of the individual segment does not differ from the closed polygon ring, even the disadvantageous sliding of the piston foot remains. Thus arise with respect to friction on the eccentric pin and cross sliding of the piston foot no improvements.

In der DE 697 24 695 T2 werden Wälzlager zwischen dem Exzenterzapfen/Polygonring und Polygonring/Kolbenfuß angeordnet, was keine raumsparende und keine preiswerte Pumpeergibt. Schließlich wird in der DE 103 13 745 A1 durch besondere Spalte zwischen den Segmenten versucht, eine hydrodynamische Schmierung zwischen dem Polygonring und dem Exzenterzapfen (Wellenabschnitt) zu bewirken. Dies wird im Sinne einer wirklichen hydrodynamischen Schmierung der Gleitlagertechnik nicht erreicht.In the DE 697 24 695 T2 Rolling between the eccentric / polygon ring and polygonal ring / piston foot are arranged, which gives no space-saving and no cheap pump. Finally, in the DE 103 13 745 A1 special gaps between the segments attempt to effect hydrodynamic lubrication between the polygon ring and the eccentric pin (shaft portion). This is not achieved in the sense of a true hydrodynamic lubrication of the plain bearing technology.

Die genannten Vorschläge können durchgreifende Verbesserungen der Reib- und Gleitverhältnisse noch nicht erbringen, es sind weitere verbesserte Lösungen erforderlich.The above proposals can not yet provide radical improvements in the friction and sliding conditions, there are further improved solutions required.

Der Erfindung liegt deshalb die Aufgabe zugrunde, den bekannten Systemen mit ebenen Gleitflächen und hohen Reibungskräften auch bei den zylindrischen Gleitpaarungen ein neues verbessertes Übertragungssystem gegenüber zu stellen. Ferner gehören weitere Verbesserungen hinsichtlich der Pumpengestaltung, der Ventilanordnungen und andere Detaillösungen zur Erfindungsaufgabe.The invention is therefore based on the object to provide the known systems with flat sliding surfaces and high friction forces even with the cylindrical bearings a new improved transmission system. Further improvements include pump design, the valve assemblies and other detailed solutions to the invention task.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass ein Kippsegment auf einem Exzenterzapfen aufgelagert und überein Drehlager mit einem den Kolben betätigenden Stößel verbunden ist. Das Kippsegment schwimmt unter Bildung eines Flüssigkeitskeiles auf dem Exzenterzapfen auf, jegliches Quergleiten wird vermieden.This object is achieved in that a tilting pad superimposed on an eccentric pin and a pivot bearing is connected to a piston actuating plunger. The tilting segment floats to form a liquid wedge on the eccentric pin, any transverse sliding is avoided.

Weitere erfindungsgemäße Lösungen sind in den nachfolgend dargestellten Ausführungsbeispielen angegeben.Further solutions according to the invention are given in the exemplary embodiments illustrated below.

Die Zeichnungen zeigen:

Fig. 1
einen Frontalschnitt durch die Pumpe,
Fig. 2
einen Schnitt nach der Linie I-I in Fig. 1,
Fig. 3
einen Abschnitt der Fig. 1,
Fig. 4
einen Abschnitt der Fig. 2,
Fig. 5
einen weiteren Abschnitt der Fig. 1.
The drawings show:
Fig. 1
a frontal section through the pump,
Fig. 2
a section along the line II in Fig. 1 .
Fig. 3
a section of Fig. 1 .
Fig. 4
a section of Fig. 2 .
Fig. 5
another section of the Fig. 1 ,

Die Fig. 1 zeigt ein Pumpengehäuse 1 mit beispielsweise drei Kolben/Zylinder-Einheiten, welche jeweils aus einem Zylinder 2 und einem Kolben 3 bestehen und mit einem Stößel 4, einem Kippsegment 5 und einem zentralen Exzenterzapfen 6 in Wirkverbindung stehen. Zwischen dem Stößel 4 und dem Kippsegment 5 ist ein Drehlager 7 angeordnet.The Fig. 1 shows a pump housing 1 with, for example, three piston / cylinder units, each consisting of a cylinder 2 and a piston 3 and are in operative connection with a plunger 4, a tilting segment 5 and a central eccentric pin 6. Between the plunger 4 and the tilting segment 5, a pivot bearing 7 is arranged.

Der Kolben 3 ist mit dem Stößel 4 in bekannter Weise fest oder gelenkig verbunden und eine Spiralfeder 8, die zwischen dem Stößel 4 und dem Zylinder 2 angeordnet ist, gewährleistet den Rückhub des bewegten Systems Kolben 3/Stößel 4.The piston 3 is connected to the plunger 4 in a known manner fixed or hinged and a coil spring 8, which is arranged between the plunger 4 and the cylinder 2, ensures the return stroke of the moving system piston 3 / plunger. 4

Der Pumphub erfolgt bei Umlauf des Exzenterzapfens 6 vom Kippsegment 5 über das Drehgelenk 7 zum System Kolben 3/Stößel 4. Das Kippsegment 5 ist dabei als hydrodynamisches Kippsegmentlager, z. B. nach DIN 31657/1-4, ausgebildet und gewährleistet mit ansteigender Pumpendrehzahl eine volle hydrodynamische Schmierung. Bei einem solchen Kippsegmentlager ist der Radius des Kippsegmentes um einen gewissen Betrag größer als der Zapfenradius, so dass unter Ankippen des exzentrisch gelagerten Segmentes ein Flüssigkeitskeil schnell und effektiv aufgebaut wird. Dabei kann wegen der beim Anlaufen der Pumpe entstehenden Mischreibung ein Gleitlagerwerkstoff bekannter Art mit der Lauffläche des Kippsegmentes 5 verbunden sein.The pumping stroke takes place during rotation of the eccentric pin 6 from the tilting segment 5 via the rotary joint 7 to the system piston 3 / plunger 4. The tilting segment 5 is a hydrodynamic Kippsegmentlager, z. B. according to DIN 31657 / 1-4, trained and ensures full hydrodynamic lubrication with increasing pump speed. In such a tilting pad bearing, the radius of the tilting pad is larger by a certain amount than the pin radius, so that a liquid wedge is built up quickly and effectively while tilting the eccentrically mounted segment. In this case, a sliding bearing material of known type may be connected to the running surface of the tilting segment 5 because of the mixing friction occurring when the pump starts up.

Mit diesen erfindungsgemäßen Mitteln werden Reibleistung und Verschleiß der kraftübertragenden Elemente wirksam verringert, ein Quergleiten dieser Elemente findet nicht mehr statt.With these inventive agents friction loss and wear of the force-transmitting elements are effectively reduced, a transverse sliding of these elements no longer takes place.

Eine weitere erfindungsgemäße Ausgestaltung der Pumpe ist dadurch gekennzeichnet, dass im Zylinder 2 die Saug- und Drucksteuerelemente direkt angeordnet sind.A further embodiment of the pump according to the invention is characterized in that the suction and pressure control elements are arranged directly in the cylinder 2.

Das Saugventil 9, beispielsweise als federbelastetes Plattenventil ausgebildet und über Saugbohrungen 10 mit dem vordruckbeaufschlagten Pumpeninnnraum 11 verbunden, ist ebenso Bestandteil des Zylinders 2 wie das Druckventil 12, welches über Druckbohrungen 13 mit dem Zentralkanal 14, der die Druckströme aller Pumpenelemente aufnimmt, verbunden ist. Die Übergangsstelle 15, durch bekannte und bewährte Elemente druckdicht gestaltet, ist die einzige erforderliche Abdichtstelle zwischen den Zylinder 2 und dem Pumpengehäuse 1. Alle weiteren Abdichtungen wie geläppte Planflächen, Sonderdichtungen u. dgl. entfallen, so dass besonders starke Anpresskräfte des Zylinders 2 auf das Pumpengehäuse 1 nicht erforderlich sind. Bei beispielsweise 7 mm Kolbendurchmesser und 2500 bar Pumpendruck reichen vier Schrauben 16 der Größe M6 aus, um die Zylinder 2 ausreichend zu befestigen.The suction valve 9, for example, designed as a spring-loaded plate valve and connected via suction holes 10 with the vorgeruckbeaufschlagten Pumpeninnnraum 11 is also part of the cylinder 2 as the pressure valve 12, which is connected via pressure holes 13 to the central channel 14, which receives the pressure flows of all pump elements. The transition point 15, designed pressure-tight by known and proven elements, is the only required sealing point between the cylinder 2 and the pump housing 1. All other seals such as lapped plan surfaces, special seals u. Like. omitted, so that particularly strong contact forces of the cylinder 2 on the pump housing 1 are not required. For example, with 7 mm piston diameter and 2500 bar pump pressure, four screws 16 of size M6 are sufficient to adequately secure the cylinders 2.

Ein Vorteil der Erfindung besteht nach den vorstehenden Ausführungen auch darin, dass die Elemente Zylinder 2/Kolben 3/Stößel 4/Kippsegment 5/Spiralfeder 8/Ventile 9 und 12 eine geschlossene Einheit bilden, welche als solche z. B. für Pumpen unterschiedlicher Zylinderzahl unverändert eingesetzt werden kann.An advantage of the invention according to the above statements also in that the elements cylinder 2 / piston 3 / plunger 4 / tilting segment 5 / coil spring 8 / valves 9 and 12 form a closed unit, which as such z. B. can be used unchanged for pumps of different numbers of cylinders.

Die Fig. 2 zeigt den im Pumpengehäuse 1 eingesetzten Zylinder 2 einschließlich Kolben 3, Stößel 4, Kippsegment 5, Drehlager 7, sowie den antreibenden Exzenterzapfen 6.The Fig. 2 shows the cylinder 2 used in the pump housing 1 including the piston 3, plunger 4, tilting segment 5, pivot bearing 7, and the driving eccentric. 6

Damit die Spiralfedern 8 nicht auch die Fliehkräfte der Kippsegmente 5 kompensieren müssen, besitzen diese Führungszapfen 5a, welche in Seitenscheiben 17 eingreifen. Diese, auf dem Exzenterzapfen 6 gelagerten Seitenscheiben 17 sind im Bereich der Kippsegmente 5 geschlitzt, so dass bei der Schwenkbewegung der Kippsegmente 5 die Zapfen 5a diese Schwenkung mit ausführen können.So that the coil springs 8 do not have to compensate for the centrifugal forces of the tilting segments 5, these guide pins 5a which engage in side windows 17 have. This, mounted on the eccentric pin 6 side plates 17 are slotted in the region of the tilting segments 5, so that during the pivotal movement of the tilting segments 5, the pins 5a can perform this pivoting.

Die Seitenscheiben 17 unterstützen ferner den Aufbau und Erhalt des Flüssigkeitskeiles unter dem Kippsegment 5, indem sie als Begrenzungswände das seitliche Abfließen des Mediums aus dem Flüssigkeitskeil behindern.The side windows 17 further support the construction and maintenance of the liquid wedge under the tilting segment 5, by hindering as boundary walls, the lateral outflow of the medium from the liquid wedge.

Ein im Pumpengehäuse 1 eingesetzten Gehäusedeckel 18 bildet den seitlichen Abschluss der Pumpe und gibt den Teilen Exzenterzapfen 6, Kippsegment 5 und den Seitenscheiben 17 eine axiale Führung.A housing cover 18 inserted in the pump housing 1 forms the lateral end of the pump and gives the parts eccentric pin 6, tilting segment 5 and the side windows 17 an axial guidance.

Die Fig. 3 zeigt als Abschnitt der Fig. 1 die Ausführung des Drehlagers als Wellenstück 7, welches zwischen dem Kippsegment 5 und dem Stößel 4 eingelegt ist. Dieses Wellenstück 7 besitzt dann auch die Führungszapfen 5a, welche in die Seitenscheiben 17 eingreifen, wie Fig. 4 zeigt.The Fig. 3 shows as a section of Fig. 1 the execution of the pivot bearing as a shaft piece 7, which is inserted between the tilting segment 5 and the plunger 4. This shaft piece 7 then also has the guide pin 5a, which engage in the side windows 17, such as Fig. 4 shows.

Die Fig. 5 zeigt in einer weiteren Ausgestaltung der Erfindung die Ausführung des Stößels 4 als U-förmiges prismatisches Teil. Dieser U-förmige Stößel 4 arbeitet dann mit dem Hals des Zylinders 2 derart zusammen, dass dieser Hals nicht von kreisförmiger Gestalt ist, sondern zwei parallele Gleitflächen 19 besitzt. Anstelle der Spiralfeder 8 treten dann zwei Flachfedern 20.The Fig. 5 shows in a further embodiment of the invention, the embodiment of the plunger 4 as a U-shaped prismatic part. This U-shaped plunger 4 then cooperates with the neck of the cylinder 2 such that this neck is not of circular shape, but has two parallel sliding surfaces 19. Instead of the coil spring 8 then two flat springs 20 occur.

Die Erfindung beschreibt eine für hohe Massenfertigung geeignete, preiswerte und reibungsarme Hochdruckpumpe. Sie ist noch nicht mit einer Regelung des Fördervolumes ausgestattet. Vorzugsweise soll die Pumpe mit einer exakten, auf Hubverstellung basierenden, dem Anmelder geschützten Fördermengenregelung ausgerüstet werden.The invention describes a suitable for high mass production, inexpensive and low-friction high-pressure pump. It is not yet equipped with a regulation of the delivery volume. Preferably, the pump should be equipped with a precise, based on stroke adjustment, the applicant protected flow control.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Pumpengehäusepump housing
22
Zylindercylinder
33
Kolbenpiston
44
Stößeltappet
55
Kippsegmenttilt segment
5a5a
Führungszapfenspigot
66
Exzenterzapfeneccentric
77
Drehlager, WellenstückSwivel bearing, shaft piece
88th
Spiralfederspiral spring
99
Saugventilsuction
1010
Saugbohrungsuction bore
1111
PumpeninnenraumPump interior
1212
Druckventilpressure valve
1313
Druckbohrungpressure bore
1414
ZentralkanalCentral channel
1515
ÜbergangsstelleCheckpoint
1616
Schraubenscrew
1717
Seitenscheibenside windows
1818
Gehäusedeckelhousing cover
1919
Gleitflächensliding surfaces
2020
Flachfederflat spring

In Betracht gezogene Druckschriften

  • DE 102 47 645 A1
  • DE 198 29 547 A1
  • DE 697 24 695 T2
  • DE 103 13 745 A1
  • DE 197 53 593 A1
  • DE 198 16 044 A1
  • DE 101 50 351 A1
DIN 31657, Teil 1 bis 4 (Hydrodynamische Radial-Gleitlager,Kippsegmentlager) Considered pamphlets
  • DE 102 47 645 A1
  • DE 198 29 547 A1
  • DE 697 24 695 T2
  • DE 103 13 745 A1
  • DE 197 53 593 A1
  • DE 198 16 044 A1
  • DE 101 50 351 A1
DIN 31657, Parts 1 to 4 (Hydrodynamic radial plain bearings, tilting segment bearings)

Claims (5)

Radialkolbenpumpe, insbes. für Common Rail (CR)-Einspritzsysteme, mit um einer zentralen Antriebs-Exzenterwelle angeordneten Kolben/Zylinder/Ventil-Systemen, segmentartigen Übertragungsgliedern zwischen der Exzenterwelle und den Kolben/Zylinder-Systemen, mit korrespondierenden Saug- und Druckventilen zu den Pumpenarbeitsräumen, druckdichter Verbindung zwischen den Pumpenzylindern und dem Pumpengehäuse und vordruckbeaufschlagten Pumpenarbeitssräumen, dadurch gekennzeichnet, dass ein Kippsegment (5) auf einem Exzenterzapfen (6) aufgelagert und außermittig über ein Drehlager (7) gelenkig mit einem Stößel (4) und an diesem befestigten Kolben (3) verbunden ist, derart, dass das Kippsegment (5) unter Ankippen und Bildung eines Flüssigkeitskeiles hydrodynamisch auf dem Exzenterzapfen (6) aufschwimmt und die Elemente Zylinder (2)/Kolben (3)/Stößel (4)/Kippsegment (5)/Spiralfeder (8)/Flachfeder (20)/Ventile (9; 10) als geschlossene, pumpfähige Einheit im Pumpengehäuse (1) eingesetzt sind.Radial piston pump, esp. For common rail (CR) injection systems, arranged around a central drive eccentric shaft piston / cylinder / valve systems, segment-like transmission links between the eccentric shaft and the piston / cylinder systems, with corresponding suction and pressure valves to the Pump work spaces, pressure-tight connection between the pump cylinders and the pump housing and vorgeruckbeaufschlagten pump working spaces, characterized in that a tilting segment (5) on an eccentric pin (6) superimposed and eccentrically via a pivot bearing (7) articulated with a plunger (4) and attached to this piston (3) is connected, such that the tilting segment (5) hydrodynamically floats on the eccentric pin (6) while tilting and forming a liquid wedge and the elements cylinder (2) / piston (3) / plunger (4) / tilting segment (5) / Spiral spring (8) / flat spring (20) / valves (9; 10) as closed, pumpable unit in the pump housing (1) are currently. Radialkolbenpumpe nach Anspruch 1, dadurch gekennzeichnet, dass das Kippsegment (5) mit Führungszapfen (5a) versehen ist, welche mit auf dem Exzenterzapfen (6) gelagerten Seitenscheiben (17) im Eingriff stehen.Radial piston pump according to claim 1, characterized in that the tilting segment (5) is provided with guide pins (5a) which are in engagement with side discs (17) mounted on the eccentric pin (6). Radialkolbenpumpe nach Anspruch 1 und 2, dadurch gekennzeichnet, dass das Drehlager (7) als Wellenstück ausgebildet ist und Führungszapfen (5a) besitzt, welche in die Seitenscheiben (17) eingreifen.Radial piston pump according to claim 1 and 2, characterized in that the pivot bearing (7) is designed as a shaft piece and guide pin (5a) which engage in the side windows (17). Radialkolbenpumpe nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass der Stößel (4) als U-förmiges prismatisches Teil ausgebildet ist und mit an dem Zylinder (2) angearbeiteten parallelen Gleitflächen (19) zusammenarbeitet, wobei Flachfedern (20) zwischen dem U-förmigen Stößel (4) und dem Zylinder (2) angeordnet sind.Radial piston pump according to claim 1 to 3, characterized in that the plunger (4) is designed as a U-shaped prismatic part and cooperates with the cylinder (2) parallel sliding surfaces (19), wherein flat springs (20) between the U-shaped Plunger (4) and the cylinder (2) are arranged. Radialkolbenpumpe nach Anspruch 1 bis 4, dadurch gekennzeichnet, dass die Saugventile (9) und die Druckventile (12) ohne Zwischenschaltung von Dichtelementen im Zylinder (2) vollständig integriert sind und die Saugbohrungen (10) direkt mit dem Pumpeninnenraum (11) und die Druckbohrungen (13) über eine Übergangsstelle (15) mit einem Zentralkanal (14) in Verbindung stehen.Radial piston pump according to claim 1 to 4, characterized in that the suction valves (9) and the pressure valves (12) without the interposition of sealing elements in the cylinder (2) are fully integrated and the suction holes (10) directly to the pump interior (11) and the pressure holes (13) via a transition point (15) with a central channel (14) are in communication.
EP20080103432 2007-04-17 2008-04-08 Radial piston pump, in particular for Common Rail (CR) injection systems Not-in-force EP1985853B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007019261A DE102007019261A1 (en) 2007-04-17 2007-04-17 Radial piston pump, esp. For Common Rail (CR) injection systems

Publications (2)

Publication Number Publication Date
EP1985853A1 true EP1985853A1 (en) 2008-10-29
EP1985853B1 EP1985853B1 (en) 2011-08-17

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DE (1) DE102007019261A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104544A2 (en) 2010-02-23 2011-09-01 Artemis Intelligent Power Limited Variable displacement radial piston fluid working machine
WO2013010458A1 (en) * 2011-07-14 2013-01-24 Neo Mechanics Limited Diesel engine fuel injection pump which pistons are sealed with all metal seal rings
WO2013010627A1 (en) * 2011-07-15 2013-01-24 Deutz Aktiengesellschaft Roller tappet pump unit
CN103089507A (en) * 2013-01-09 2013-05-08 中国第一汽车股份有限公司无锡油泵油嘴研究所 Double-row six-cylinder radial type common-rail oil feed pump
DE102016106232B3 (en) * 2016-04-06 2017-08-31 L'orange Gmbh Radial piston pump, especially for fuel, with several storage holes in the housing of the radial piston pump
CN108050041A (en) * 2018-01-25 2018-05-18 刘硕毅 Coplanar multi-cylinder Direct Action Type gas compression mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102121466B (en) * 2011-04-15 2012-10-10 浙江大农实业有限公司 Pump head structure of plunger pump
CN102720647A (en) * 2012-06-01 2012-10-10 泸州天府液压件有限公司 Open-type low-speed high-flow radial plunger pump
CN112412722B (en) * 2020-11-05 2022-07-05 太原理工大学 High-speed active lubrication radial static balance plunger pump for high-water-based medium

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DE19858862A1 (en) * 1998-12-19 2000-03-02 Bosch Gmbh Robert Radial piston pump for fuel high pressure production in fuel injection system for internal combustion engine, particularly common rail injection system, has drive shaft located in pump housing, which has eccentric section
DE10150351A1 (en) 2001-10-15 2003-05-08 Bosch Gmbh Robert Pump element and piston pump for high-pressure fuel generation
EP1347172A2 (en) * 2002-03-21 2003-09-24 DaimlerChrysler AG Piston pump
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DE102004048714A1 (en) * 2004-10-06 2006-04-13 Siemens Ag Radial piston pump

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DE19846367C2 (en) * 1998-10-08 2003-06-12 Bosch Gmbh Robert Radial piston pump
DE102004011284A1 (en) * 2004-03-09 2005-09-29 Robert Bosch Gmbh High-pressure pump, in particular for a fuel injection device of an internal combustion engine

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DE420847C (en) * 1921-06-23 1925-11-02 Carl Schmieske Storage for reversible direction of movement
DE960776C (en) * 1954-04-18 1957-03-28 Eduard Woydt Dr Ing High pressure pump or motor rotating in a single direction of rotation
DE1302968B (en) * 1963-06-15 1971-01-28 Excentra Gmbh Hydraulische Ant Connection between the piston of an eccentric pump and a piston rod
DE69724695T2 (en) 1996-05-23 2004-07-15 Delphi Technologies, Inc., Troy Radial piston pump
DE19753593A1 (en) 1997-12-03 1999-06-17 Bosch Gmbh Robert Radial piston pump for high-pressure fuel supply
DE19816044A1 (en) 1998-04-09 1999-10-21 Bosch Gmbh Robert Radial piston pump for producing high fuel pressure in the fuel injection system of an internal combustion engine, particularly common rail injection systems
DE19829547A1 (en) 1998-07-02 2000-01-13 Bosch Gmbh Robert Radial piston pump especially for common rail fuel injection systems
DE19858862A1 (en) * 1998-12-19 2000-03-02 Bosch Gmbh Robert Radial piston pump for fuel high pressure production in fuel injection system for internal combustion engine, particularly common rail injection system, has drive shaft located in pump housing, which has eccentric section
DE10150351A1 (en) 2001-10-15 2003-05-08 Bosch Gmbh Robert Pump element and piston pump for high-pressure fuel generation
EP1347172A2 (en) * 2002-03-21 2003-09-24 DaimlerChrysler AG Piston pump
DE10247645A1 (en) 2002-10-11 2004-04-22 Robert Bosch Gmbh Radial piston pump for high pressure fuel supply has at least one lubricant pocket in plates
DE10313745A1 (en) 2003-03-27 2004-10-07 Robert Bosch Gmbh High pressure pump for IC engine fuel injection device e.g. for automobile, with hydrodynamic lubrication of bearings for ring segments operating pistons of pump elements
DE102004048714A1 (en) * 2004-10-06 2006-04-13 Siemens Ag Radial piston pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104544A2 (en) 2010-02-23 2011-09-01 Artemis Intelligent Power Limited Variable displacement radial piston fluid working machine
WO2011104544A3 (en) * 2010-02-23 2012-04-26 Artemis Intelligent Power Limited Variable displacement radial piston fluid working machine
US9003954B2 (en) 2010-02-23 2015-04-14 Artemis Intelligent Power Limited Variable displacement radial piston fluid working machine
WO2013010458A1 (en) * 2011-07-14 2013-01-24 Neo Mechanics Limited Diesel engine fuel injection pump which pistons are sealed with all metal seal rings
WO2013010627A1 (en) * 2011-07-15 2013-01-24 Deutz Aktiengesellschaft Roller tappet pump unit
CN103089507A (en) * 2013-01-09 2013-05-08 中国第一汽车股份有限公司无锡油泵油嘴研究所 Double-row six-cylinder radial type common-rail oil feed pump
DE102016106232B3 (en) * 2016-04-06 2017-08-31 L'orange Gmbh Radial piston pump, especially for fuel, with several storage holes in the housing of the radial piston pump
CN108050041A (en) * 2018-01-25 2018-05-18 刘硕毅 Coplanar multi-cylinder Direct Action Type gas compression mechanism

Also Published As

Publication number Publication date
EP1985853B1 (en) 2011-08-17
DE102007019261A1 (en) 2008-10-23

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