EP1094221A1 - Apparatus with rotary positive displacement pumps having combined drive - Google Patents

Apparatus with rotary positive displacement pumps having combined drive Download PDF

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Publication number
EP1094221A1
EP1094221A1 EP00120799A EP00120799A EP1094221A1 EP 1094221 A1 EP1094221 A1 EP 1094221A1 EP 00120799 A EP00120799 A EP 00120799A EP 00120799 A EP00120799 A EP 00120799A EP 1094221 A1 EP1094221 A1 EP 1094221A1
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EP
European Patent Office
Prior art keywords
pump
drive shaft
controlled
clutch
slip clutch
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
EP00120799A
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German (de)
French (fr)
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EP1094221B1 (en
Inventor
Erich Leitner
Petr Gütig
Rudolf Dr. Flierl
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.)
Bayerische Motoren Werke AG
Original Assignee
IG EL Ingenieur Gesellschaft Erich Leitner mbH
Bayerische Motoren Werke AG
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Publication of EP1094221A1 publication Critical patent/EP1094221A1/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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/56—Number of pump/machine units in operation

Definitions

  • the invention relates to a preamble of claim 1 Device with drive-combined circulation displacement pumps, in particular externally toothed gear pumps, especially for internal combustion engines, in one first, driven pump via the drive shaft with a second, coaxial arranged, can be coupled and uncoupled pump is combined, the coupling and decoupling the pumping into a pressure channel common to the first pump second pump by means of a frictionally and positively acting, controllable Slip clutch is effected depending on the delivery pressure or speed.
  • Such a device for changing the delivery volume as required in particular in lubricating oil pumps of internal combustion engines is, for example, from DE 43 17 645 C2 known.
  • the Slip clutch one on the drive shaft of the continuously driven pump non-rotatably arranged cone ring which can be controlled with a delivery pressure dependent Piston friction ring cooperates, which in turn has a coupling ring with the Pump rotor of the second pump, which can be connected and disconnected, is rotatably coupled.
  • For Control of the piston friction ring is used by one of the two pumps Pressure channel removed control pressure for actuating a reusable valve.
  • a gear pump controlled by a valve with several uncouplable gear pumps to achieve a variable funding volume is from the DE 41 34 219 A1 known.
  • gear pump is in sections hollow drive shaft of the constantly pump on the one hand spring-loaded and on the other hand from the delivery pressure from the common Pressure channel of all pumps acted upon slide valve, which with the uncouplable pumps are positively connected in the drive connection.
  • the individual ones that can be uncoupled Pumps uncoupled from the slider by axial displacement.
  • DE-PS 869 156 shows an arrangement in which to the housing a constant delivery pump, a second pump that can be switched on and off in one flanged separate housing in alignment with the drive shaft of the first pump is.
  • the pump rotor of the second pump is non-rotatable on a splined shaft arranged, the splined shaft freely rotatably arranged on the drive shaft has a coupling cone for the frictional and positive engagement of one connected to the drive shaft in a rotationally fixed manner and against a spring force by means of hydraulic pressure controlled displaceable clutch piston.
  • an automatically acting locking slide can be provided.
  • the invention has for its object to provide a generic device one that automatically engages and disengages a second pump Training control of simple constructional effort.
  • a respective device 1, 1 ' comprises as drive-combined circulation displacement pumps preferably externally toothed gear pumps 2, 2 'and 3, 3' as respective Lubricating oil pumps for internal combustion engines, not shown.
  • each of the devices 1, 1 'of Figures 1 and 2 is a first, driven pump 2, 2' over whose drive shaft 4, 4 'with a second, coaxially arranged, connectable and disconnectable Pump 3, 3 'combined, the coupling and decoupling of the in one with the first pump 2, 2 'promoting common, not shown pressure channel second pump 3, 3 'by means of a controllable, frictionally and positively acting Slip clutch 5, 5 'is effected depending on the delivery pressure or speed.
  • the respective slip clutch is in each of the devices 1, 1 ' 5, 5 'controlled by a centrifugal device.
  • a pump rotor 6 of the second pump 3 is included a sleeve shaft rotatably mounted on the drive shaft 4 of the first pump 2 7 at 7 'rotatably connected, the sleeve shaft 7 in the free end region is in a rotationally fixed connection with a kelly belt-like grooved disk 8, the spring-loaded as part of the slip clutch 5 a frictional and positive engagement and centrifugal force-controlled clutch jaws 9 provided with splines 10 serves.
  • the clutch shoes 10 serving as centrifugal force controlled devices are limited to a support disk 11 which is connected in a rotationally fixed manner to the drive shaft 4 pivotally mounted. Furthermore, the clutch shoes 10 are corresponding the direction of rotation of the drive shaft 4 on the support plate 11 for a self-reinforcing Engagement of the splines 9 in the pulley 8 is arranged.
  • a lubricating oil pump of an internal combustion engine is a lubricating oil pump in the area of low machine speeds ensured via both pumps 2 and 3. Is dependent on a predetermined Machine speed with the constant delivery pump 2 alone the required Delivery volume reached, the second pump 3 is decoupled by centrifugal force, the clutch shoes 10 with their wedge profiles 9 controlled by centrifugal force out of engagement are brought with the pulley 8.
  • a pump rotor 12 of the second pump 3' is via an opening 13 loose from the drive shaft 4 'of the first pump 2' enforced.
  • the opening 13 diametrically arranged cone sections 14 and 14 'form on the one hand with a cone 15 of the drive shaft 4' and on the other hand with a beveled, spring-hydraulically controllable arranged on the drive shaft 4 ' Switching sleeve 16, the slip clutch 5 ', which is hydraulically operated by means of a Centrifugal valve 17 acts on the switching sleeve 16 against the resistance a preloaded clutch spring 18 for delivery pressure or speed dependent Drive interruption of the second pump 3 'is kept released.
  • hydraulic medium is over a Annular groove 20 in the drive shaft 4 'via radial channels 21 to a central channel 22, the one end of the drive shaft 4 'by means of the centrifugal force adjustable against a spring force Valve 17 is closable. Until a predetermined one is reached At the engine speed, the hydraulic medium flows out of the central channel 22 via an annular groove 23 of the centrifugal valve 17.
  • the second pump 3' When the predetermined one is reached Machine speed and thus that of the constantly pumping pump 2 'reached flow rate, the second pump 3' is decoupled in that the delivery pressure effective on the piston 19 and generated by the first pump 2 ' Piston 19 axially displaces against the preloaded clutch spring 18 to release the switching sleeve 16 from frictional and positive engagement with the cone section 14 'or the engagement of the cone section 14 with the cone 15 of the drive shaft 4 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

The device has a first driven pump (2) combined via their drive shafts (4) with a second coaxial pump (3), which feeds into a common pressure channel and that can be coupled and decoupled using controllable friction and shape-locking slip couplings (5) that are controlled depending on the delivery pressure or revolution rate. Each slip coupling is controlled via a centrifugal force-controlled device (8,10).

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf eine Vorrichtung mit antriebskombinierten Umlaufverdrängerpumpen, insbesondere außenverzahnte Zahnradpumpen, vor allem für Brennkraftmaschinen, bei der eine erste, angetriebene Pumpe über deren Antriebswelle mit einer zweiten, gleichachsig angeordneten, zu- und abkoppelbaren Pumpe kombiniert ist, wobei die Zu- und Abkoppelung der in einen mit der ersten Pumpe gemeinsamen Druckkanal fördernden zweiten Pumpe mittels einer reib- und formschlüssig wirkenden, steuerbaren Rutschkupplung förderdruck- bzw. drehzahlabhängig bewirkt ist.The invention relates to a preamble of claim 1 Device with drive-combined circulation displacement pumps, in particular externally toothed gear pumps, especially for internal combustion engines, in one first, driven pump via the drive shaft with a second, coaxial arranged, can be coupled and uncoupled pump is combined, the coupling and decoupling the pumping into a pressure channel common to the first pump second pump by means of a frictionally and positively acting, controllable Slip clutch is effected depending on the delivery pressure or speed.

Eine derartige Vorrichtung zur bedarfsweisen Änderung des Fördervolumens insbesondere bei Schmierölpumpen von Brennkraftmaschinen ist beispielsweise aus der DE 43 17 645 C2 bekannt. Bei dieser bekannten Vorrichtung umfasst die Rutschkupplung einen auf der Antriebswelle der ständig angetriebenen Pumpe drehfest angeordneten Kegelring, der mit einem förderdruckabhängig steuerbaren Kolbenreibring zusammenwirkt, der seinerseits über einen Koppelring mit dem Pumpenrotor der zu- und abkoppelbaren zweiten Pumpe drehfest gekuppelt ist. Zur Steuerung des Kolbenreibringes dient ein aus einem von beiden Pumpen gemeinsamen Druckkanal abgenommener Steuerdruck zur Betätigung eines Mehrweg-Ventils.Such a device for changing the delivery volume as required in particular in lubricating oil pumps of internal combustion engines is, for example, from DE 43 17 645 C2 known. In this known device, the Slip clutch one on the drive shaft of the continuously driven pump non-rotatably arranged cone ring, which can be controlled with a delivery pressure dependent Piston friction ring cooperates, which in turn has a coupling ring with the Pump rotor of the second pump, which can be connected and disconnected, is rotatably coupled. For Control of the piston friction ring is used by one of the two pumps Pressure channel removed control pressure for actuating a reusable valve.

Eine ventillos gesteuerte Zahnradpumpe mit mehreren abkoppelbaren Zahnradpumpen zur Erzielung eines veränderbaren Fördervolumens ist aus der DE 41 34 219 A1 bekannt. Bei dieser bekannten Zahnradpumpe ist in der abschnittsweise hohl gestalteten Antriebswelle der konstant fördernden Pumpe ein einerseits federbelasteter und andererseits vom Förderdruck aus dem gemeinsamen Druckkanal aller Pumpen beaufschlagbarer Schieber angeordnet, der mit den abkoppelbaren Pumpen jeweils formschlüssig in Antriebsverbindung steht. Damit werden mit steigendem Förderdruck nacheinander die einzelnen, abkoppelbaren Pumpen durch axiale Verlagerung des Schiebers von diesem abgekuppelt.A gear pump controlled by a valve with several uncouplable gear pumps to achieve a variable funding volume is from the DE 41 34 219 A1 known. In this known gear pump is in sections hollow drive shaft of the constantly pump on the one hand spring-loaded and on the other hand from the delivery pressure from the common Pressure channel of all pumps acted upon slide valve, which with the uncouplable pumps are positively connected in the drive connection. In order to as the delivery pressure increases, the individual ones that can be uncoupled Pumps uncoupled from the slider by axial displacement.

Im Gegensatz zu den vorgenannten Beispielen, wobei jeweils eine Konstant-Förder-Pumpe und mindestens eine abschaltbare Pumpe in einem gemeinsamen Gehäuse angeordnet sind, zeigt die DE-PS 869 156 eine Anordnung, bei der an das Gehäuse einer Konstant-Förder-Pumpe eine zu- und abschaltbare zweite Pumpe in einem gesonderten Gehäuse mit der Antriebswelle der ersten Pumpe fluchtend angeflanscht ist. Der Pumpenrotor der zweiten Pumpe ist auf einer Vielkeilwelle drehfest angeordnet, wobei die auf der Antriebswelle frei drehbar angeordnete Vielkeilwelle einen Kupplungskonus aufweist zum reib- und formschlüssigen Eingriff eines mit der Antriebswelle drehfest verbundenen und gegen eine Federkraft mittels Hydraulikdruck gesteuert verlagerbaren Kupplungskolbens. Zur Steuerung des Hydraulikdruckes kann ein automatisch wirkender Sperrschieber vorgesehen sein.In contrast to the above examples, each with a constant delivery pump and at least one pump that can be switched off in a common housing are arranged, DE-PS 869 156 shows an arrangement in which to the housing a constant delivery pump, a second pump that can be switched on and off in one flanged separate housing in alignment with the drive shaft of the first pump is. The pump rotor of the second pump is non-rotatable on a splined shaft arranged, the splined shaft freely rotatably arranged on the drive shaft has a coupling cone for the frictional and positive engagement of one connected to the drive shaft in a rotationally fixed manner and against a spring force by means of hydraulic pressure controlled displaceable clutch piston. To control the hydraulic pressure an automatically acting locking slide can be provided.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung mit einer das Zu- und Abkuppeln einer zweiten Pumpe selbsttätig bewirkenden Steuerung von einfachem baulichem Aufwand auszubilden.The invention has for its object to provide a generic device one that automatically engages and disengages a second pump Training control of simple constructional effort.

Diese Aufgabe ist mit dem Patentanspruch 1 dadurch gelöst, dass eine jeweilige Rutschkupplung über eine fliehkraftgesteuerte Einrichtung gesteuert ist. This object is achieved with claim 1 in that a respective Slip clutch is controlled by a centrifugal device.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.

Die Erfindung ist anhand von in der Zeichnung dargestellten Ausführungsbeispielen beschrieben. Es zeigt

Figur 1
eine erfindungsgemäße Vorrichtung mit einer fliehkraftgesteuerten Rutschkupplung,
Figur 2
eine weitere erfindungsgemäße Vorrichtung mit einer Rutschkupplung, die über ein fliehkraftgesteuertes Ventil hydraulisch beaufschlagt ist.
The invention is described with reference to exemplary embodiments shown in the drawing. It shows
Figure 1
a device according to the invention with a centrifugal-controlled slip clutch,
Figure 2
a further device according to the invention with a slip clutch, which is acted upon hydraulically via a centrifugal valve.

Eine jeweilige Vorrichtung 1, 1' umfasst als antriebskombinierte Umlaufverdrängerpumpen vorzugsweise außenverzahnte Zahnradpumpen 2, 2' und 3, 3' als jeweilige Schmierölpumpen für nicht dargestellte Brennkraftmaschinen. Bei jeder der Vorrichtungen 1, 1' der Figuren 1 und 2 ist eine erste, angetriebene Pumpe 2, 2' über deren Antriebswelle 4, 4' mit einer zweiten, gleichachsig angeordneten, zu- und abkoppelbaren Pumpe 3, 3' kombiniert, wobei die Zu- und Abkoppelung der in einen mit der ersten Pumpe 2, 2' gemeinsamen, nicht gezeigten Druckkanal fördernden zweiten Pumpe 3, 3' mittels einer reib- und formschlüssig wirkenden, steuerbaren Rutschkupplung 5, 5' förderdruck- bzw. drehzahlabhängig bewirkt ist.A respective device 1, 1 'comprises as drive-combined circulation displacement pumps preferably externally toothed gear pumps 2, 2 'and 3, 3' as respective Lubricating oil pumps for internal combustion engines, not shown. With each of the devices 1, 1 'of Figures 1 and 2 is a first, driven pump 2, 2' over whose drive shaft 4, 4 'with a second, coaxially arranged, connectable and disconnectable Pump 3, 3 'combined, the coupling and decoupling of the in one with the first pump 2, 2 'promoting common, not shown pressure channel second pump 3, 3 'by means of a controllable, frictionally and positively acting Slip clutch 5, 5 'is effected depending on the delivery pressure or speed.

Erfindungsgemäß ist bei jeder der Vorrichtungen 1, 1' die jeweilige Rutschkupplung 5, 5' über eine fliehkraftgesteuerte Einrichtung gesteuert.According to the invention, the respective slip clutch is in each of the devices 1, 1 ' 5, 5 'controlled by a centrifugal device.

Bei der Vorrichtung 1 nach Figur 1 ist ein Pumpenrotor 6 der zweiten Pumpe 3 mit einer auf der Antriebswelle 4 der ersten Pumpe 2 drehbeweglich gelagerten Hülsenwelle 7 bei 7' drehfest verbunden, wobei die Hülsenwelle 7 im freien Endbereich mit einer keliriemenartig gestalteten Rillenscheibe 8 in drehfester Verbindung steht, die als Teil der Rutschkupplung 5 einem reib- und formschlüssigen Eingriff federbelasteter und fliehkraftgesteuerter, mit Keilprofilen 9 versehener Kupplungsbacken 10 dient. Die als fliehkraftgesteuerte Einrichtungen dienenden Kupplungsbacken 10 sind an einer mit der Antriebswelle 4 drehfest verbundenen Tragscheibe 11 begrenzt schwenkbeweglich gelagert. Weiter sind die Kupplungsbacken 10 entsprechend der Drehrichtung der Antriebswelle 4 an der Tragscheibe 11 für einen selbstverstärkenden Eingriff der Keilprofile 9 in die Rillenscheibe 8 angeordnet.In the device 1 according to FIG. 1, a pump rotor 6 of the second pump 3 is included a sleeve shaft rotatably mounted on the drive shaft 4 of the first pump 2 7 at 7 'rotatably connected, the sleeve shaft 7 in the free end region is in a rotationally fixed connection with a kelly belt-like grooved disk 8, the spring-loaded as part of the slip clutch 5 a frictional and positive engagement and centrifugal force-controlled clutch jaws 9 provided with splines 10 serves. The clutch shoes 10 serving as centrifugal force controlled devices are limited to a support disk 11 which is connected in a rotationally fixed manner to the drive shaft 4 pivotally mounted. Furthermore, the clutch shoes 10 are corresponding the direction of rotation of the drive shaft 4 on the support plate 11 for a self-reinforcing Engagement of the splines 9 in the pulley 8 is arranged.

Mit der vorbeschriebenen Vorrichtung 1 als Schmierölpumpe einer Brennkraftmaschine ist im Bereich niederer Maschinendrehzahlen eine Schmierölförderung über beide Pumpen 2 und 3 sichergestellt. Ist in Abhängigkeit einer vorbestimmten Maschinendrehzahl mit der konstant fördernden Pumpe 2 alleine das erforderliche Fördervolumen erreicht, wird die zweite Pumpe 3 fliehkraftgesteuert abgekoppelt, wobei die Kupplungsbacken 10 mit ihren Keilprofilen 9 fliehkraftgesteuert außer Eingriff mit der Rillenscheibe 8 gebracht sind.With the device 1 described above as a lubricating oil pump of an internal combustion engine is a lubricating oil pump in the area of low machine speeds ensured via both pumps 2 and 3. Is dependent on a predetermined Machine speed with the constant delivery pump 2 alone the required Delivery volume reached, the second pump 3 is decoupled by centrifugal force, the clutch shoes 10 with their wedge profiles 9 controlled by centrifugal force out of engagement are brought with the pulley 8.

Bei der Vorrichtung 1' nach Figur 2 ist ein Pumpenrotor 12 der zweiten Pumpe 3' über eine Durchbrechung 13 von der Antriebswelle 4' der ersten Pumpe 2' lose durchsetzt. In der Durchbrechung 13 diametral angeordnete Kegelabschnitte 14 und 14' bilden einerseits mit einem Konus 15 der Antriebswelle 4' und andererseits mit einer angeschrägten, auf der Antriebswelle 4' federhydraulisch steuerbar angeordneten Schalthülse 16 die Rutschkupplung 5', die über die hydraulisch mittels eines fliehkraftgesteuerten Ventiles 17 beaufschlagte Schalthülse 16 gegen den Widerstand einer vorgespannten Kupplungsfeder 18 zur förderdruck- bzw. drehzahlabhängigen Antriebsunterbrechung der zweiten Pumpe 3' gelöst gehalten ist.In the device 1 'according to FIG. 2, a pump rotor 12 of the second pump 3' is via an opening 13 loose from the drive shaft 4 'of the first pump 2' enforced. In the opening 13 diametrically arranged cone sections 14 and 14 'form on the one hand with a cone 15 of the drive shaft 4' and on the other hand with a beveled, spring-hydraulically controllable arranged on the drive shaft 4 ' Switching sleeve 16, the slip clutch 5 ', which is hydraulically operated by means of a Centrifugal valve 17 acts on the switching sleeve 16 against the resistance a preloaded clutch spring 18 for delivery pressure or speed dependent Drive interruption of the second pump 3 'is kept released.

Bei dieser Vorrichtung 1' ist bis zum Erreichen einer vorbestimmten Maschinendrehzahl der Pumpenrotor 12 der zweiten Pumpe 3' unter der Einwirkung der angeschrägten Schalthülse 16 mittels der vorgespannt angeordneten Kupplungsfeder 18 mit dem Konus 15 der Antriebswelle 4' in reibschlüssiger Verbindung gehalten. Die axial begrenzt verschiebbar angeordnete Schalthülse 16 steht mit einem von der vorgespannten Kupplungsfeder 18 beaufschlagten Kolben 19 in Antriebsverbindung, der andererseits vom Förderdruck im gemeinsamen, nicht gezeigten Druckkanal der beiden Pumpen 2' und 3' beaufschlagbar ist. Hierfür ist Hydraulikmedium über eine Ringnut 20 in der Antriebswelle 4' über Radialkanäle 21 einem Zentralkanal 22 zugeführt, der einenends der Antriebswelle 4' mittels des gegen eine Federkraft fliehkraftverstellbaren Ventils 17 verschließbar ist. Bis zum Erreichen einer vorbestimmten Maschinendrehzahl fließt das Hydraulikmedium aus dem Zentralkanal 22 über eine Ringnut 23 des fliehkraftgesteuerten Ventils 17 ab. Mit Erreichen der vorbestimmten Maschinendrehzahl und damit des von der konstant fördernden Pumpe 2' erreichten Förderstromes wird die zweite Pumpe 3' dadurch abgekoppelt, dass der am Kolben 19 wirksame und von der ersten Pumpe 2' erzeugte Förderdruck den Kolben 19 gegen die vorgespannte Kupplungsfeder 18 axial verschiebt zum Lösen der Schalthülse 16 vom reib- und formschlüssigen Eingriff mit dem Kegelabschnitt 14' bzw. des Eingriffes des Kegelabschnittes 14 mit dem Konus 15 der Antriebswelle 4'.In this device 1 'is until a predetermined engine speed is reached the pump rotor 12 of the second pump 3 'under the action of the beveled Switching sleeve 16 by means of the preloaded clutch spring 18 held in frictional connection with the cone 15 of the drive shaft 4 '. The axially displaceable switching sleeve 16 is located with one of the biased clutch spring 18 acted upon piston 19 in drive connection, on the other hand, the delivery pressure in the common pressure channel, not shown two pumps 2 'and 3' can be acted upon. For this, hydraulic medium is over a Annular groove 20 in the drive shaft 4 'via radial channels 21 to a central channel 22, the one end of the drive shaft 4 'by means of the centrifugal force adjustable against a spring force Valve 17 is closable. Until a predetermined one is reached At the engine speed, the hydraulic medium flows out of the central channel 22 via an annular groove 23 of the centrifugal valve 17. When the predetermined one is reached Machine speed and thus that of the constantly pumping pump 2 'reached flow rate, the second pump 3' is decoupled in that the delivery pressure effective on the piston 19 and generated by the first pump 2 ' Piston 19 axially displaces against the preloaded clutch spring 18 to release the switching sleeve 16 from frictional and positive engagement with the cone section 14 'or the engagement of the cone section 14 with the cone 15 of the drive shaft 4 '.

Mit beiden Vorrichtungen 1 und 1' ist bei Unterschreiten der vorbestimmten Maschinendrehzahl ein stoßfreies Zukoppeln der jeweiligen zweiten, abgekoppelten Pumpe 3, 3' erzielt.With both devices 1 and 1 'is below the predetermined engine speed a bumpless coupling of the respective second, uncoupled pump 3, 3 'achieved.

Claims (4)

Vorrichtung mit antriebskombinierten Umlaufverdrängerpumpen, insbesondere außenverzahnte Zahnradpumpen, vor allem für Brennkraftmaschinen, bei der eine erste, angetriebene Pumpe (2, 2') über deren Antriebswelle (4, 4') mit einer zweiten gleichachsig angeordneten, zu- und abkoppelbaren Pumpe (3, 3') kombiniert ist, wobei die Zu- und Abkoppelung der in einen mit der ersten Pumpe (2, 2') gemeinsamen Druckkanal fördernden zweiten Pumpe (3, 3') mittels einer reib- und formschlüssig wirkenden, steuerbaren Rutschkupplung (5, 5') förderdruck- bzw. drehzahlabhängig bewirkt ist,
dadurch gekennzeichnet, dass eine jeweilige Rutschkupplung (5, 5') über eine fliehkraftgesteuerte Einrichtung (8, 10; 17) gesteuert ist. Device with drive-combined circulation displacement pumps, in particular externally toothed gear pumps, especially for internal combustion engines, in which a first, driven pump (2, 2 ') is combined via its drive shaft (4, 4') with a second pump (3, 3 ') which can be connected and disconnected at the same axis, whereby the coupling and uncoupling of the second pump (3, 3 '), which delivers pressure to the first pump (2, 2') and is common to the first pump (2, 2 '), by means of a frictional and form-fitting, controllable slip clutch (5, 5') depending on the delivery pressure or speed is caused
characterized, that a respective slip clutch (5, 5 ') is controlled via a centrifugal force-controlled device (8, 10; 17). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Pumpenrotor (6) der zweiten Pumpe (3) mit einer auf der Antriebswelle (4) der ersten Pumpe (2) drehbeweglich gelagerten Hülsenwelle (7) drehfest verbunden ist, und die Hülsenwelle (7) im freien Endbereich mit einer keilriemenartig gestalteten Rillenscheibe (8) in drehfester Verbindung steht, wobei die Rillenscheibe (8) als Teil einer Rutschkupplung (5) einem reib- und formschlüssigen Eingriff federbelasteter und fliehkraftgesteuerter, mit Keilprofilen (9) versehener Kupplungsbacken (10) dient, die an einer mit der Antriebswelle (4) drehfest verbundenen Tragscheibe (11) schwenkbeweglich gelagert sind. Device according to claim 1, characterized in that a pump rotor (6) of the second pump (3) is rotatably connected to a sleeve shaft (7) rotatably mounted on the drive shaft (4) of the first pump (2), and the sleeve shaft (7) is in the free end region with a V-belt-shaped grooved disc (8) in a rotationally fixed connection, wherein the grooved disc (8), as part of a slip clutch (5), serves for a frictional and positive engagement of spring-loaded and centrifugal force-controlled clutch shoes (10) provided with wedge profiles (9), which are pivotally mounted on a support disk (11) which is connected to the drive shaft (4) in a rotationally fixed manner. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Kupplungsbacken (10) an der Tragscheibe (11) entsprechend einem selbstverstärkenden Eingriff in die Rillenscheibe (8) angeordnet sind.Apparatus according to claim 2, characterized in that the coupling jaws (10) are arranged on the support plate (11) in accordance with a self-reinforcing engagement in the grooved plate (8). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Pumpenrotor (12) der zweiten Pumpe (3') über eine Durchbrechung (13) von der Antriebswelle (4') der ersten Pumpe (2') lose durchsetzt ist, und in der Durchbrechung (13) diametral angeordnete Kegelabschnitte (14, 14') einerseits mit einem Konus (15) der Antriebswelle (4') und andererseits mit einer angeschrägten, auf der Antriebswelle (4') federhydraulisch steuerbar angeordneten Schalthülse (16) eine Rutschkupplung (5') bilden, die über die hydraulisch mittels eines fliehkraftgesteuerten Ventils (17) beaufschlagte Schalthülse (16) gegen den Widerstand einer vorgespannten Kupplungsfeder (18) zur förderdruck- bzw. drehzahlabhängigen Antriebsunterbrechung der zweiten Pumpe (3') gelöst gehalten ist. Device according to claim 1, characterized in that a pump rotor (12) of the second pump (3 ') is loosely penetrated by the drive shaft (4') of the first pump (2 ') via an opening (13), and in the opening (13) diametrically arranged cone sections (14, 14 ') on the one hand with a cone (15) of the drive shaft (4') and on the other hand with a beveled, on the drive shaft (4 ') spring-hydraulically controllable switching sleeve (16) a slip clutch (5 ') form the Via the switching sleeve (16), which is acted upon hydraulically by means of a centrifugal force-controlled valve (17), is kept released against the resistance of a prestressed clutch spring (18) for interrupting the drive pressure of the second pump (3 ') as a function of the delivery pressure or speed.
EP20000120799 1999-10-19 2000-09-23 Apparatus with rotary positive displacement pumps having combined drive Expired - Lifetime EP1094221B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999150206 DE19950206A1 (en) 1999-10-19 1999-10-19 Device with drive-combined circulation displacement pumps, in particular externally toothed gear pumps, especially for internal combustion engines
DE19950206 1999-10-19

Publications (2)

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EP1094221A1 true EP1094221A1 (en) 2001-04-25
EP1094221B1 EP1094221B1 (en) 2007-11-28

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EP (1) EP1094221B1 (en)
DE (2) DE19950206A1 (en)
ES (1) ES2293880T3 (en)

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WO2002079662A1 (en) * 2001-03-30 2002-10-10 Eaton Corporation Clutch assembly with a gear pump
EP1277960A2 (en) * 2001-07-17 2003-01-22 Pierburg S.p.A. Variable-delivery pump
WO2011095148A3 (en) * 2010-02-04 2012-06-21 Ixetic Bad Homburg Gmbh Tandem pump comprising a switchable coupling between the two pumps

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DE102014204946A1 (en) * 2014-03-18 2015-09-24 Mahle International Gmbh pump assembly
DE102018212497A1 (en) * 2018-07-26 2020-01-30 Eckerle Technologies GmbH Fluid delivery device

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Publication number Priority date Publication date Assignee Title
WO2002079662A1 (en) * 2001-03-30 2002-10-10 Eaton Corporation Clutch assembly with a gear pump
EP1277960A2 (en) * 2001-07-17 2003-01-22 Pierburg S.p.A. Variable-delivery pump
EP1277960A3 (en) * 2001-07-17 2003-11-05 Pierburg S.p.A. Variable-delivery pump
WO2011095148A3 (en) * 2010-02-04 2012-06-21 Ixetic Bad Homburg Gmbh Tandem pump comprising a switchable coupling between the two pumps

Also Published As

Publication number Publication date
DE50014811D1 (en) 2008-01-10
DE19950206A1 (en) 2001-04-26
EP1094221B1 (en) 2007-11-28
ES2293880T3 (en) 2008-04-01

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