EP2450547B1 - Water pump for a combustion engine - Google Patents

Water pump for a combustion engine Download PDF

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Publication number
EP2450547B1
EP2450547B1 EP11008643.6A EP11008643A EP2450547B1 EP 2450547 B1 EP2450547 B1 EP 2450547B1 EP 11008643 A EP11008643 A EP 11008643A EP 2450547 B1 EP2450547 B1 EP 2450547B1
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EP
European Patent Office
Prior art keywords
water pump
rotor
caracterized
pump according
drum
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Not-in-force
Application number
EP11008643.6A
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German (de)
French (fr)
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EP2450547A2 (en
EP2450547A3 (en
Inventor
Michael Aschaber
Wolfgang Gruber
Josef Wagner
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Steyr Motors GmbH
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Steyr Motors GmbH
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Publication of EP2450547A2 publication Critical patent/EP2450547A2/en
Publication of EP2450547A3 publication Critical patent/EP2450547A3/en
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Publication of EP2450547B1 publication Critical patent/EP2450547B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members

Definitions

  • the invention relates to water pumps, essentially consisting of a housing, a rotor shaft with pump rotor and connected to the shaft pulley for driving the pump by means of a V-belt or a toothed belt.
  • the drive of such pumps usually takes place by means of a wedge, flat or toothed belt.
  • the driving pulley is usually located on the crankshaft of an internal combustion engine. Often, the same belt drives multiple units.
  • a toothed belt By means of a toothed belt, a camshaft is also driven. In this case, not only the correct belt tension is to be maintained, but also the synchronism between crankshaft and camshaft. This namely determines the closing times of the gas exchange valves.
  • the FR 2.230.225 discloses a pump for an internal combustion engine whose housing rests with its open, the rotor receiving, pumping space on the cylinder block and the bottom of which is penetrated by the rotor shaft, wherein the pulley connected to the rotor shaft is mounted on a surrounding a flange of the housing bottom roller bearing. For maintenance or repair work, the drive belt must be removed and the entire pump disconnected from the engine block.
  • JPS5784331 discloses a pump having a housing, a rotor shaft with pumping rotor and a shaft connected to the pulley for driving the pump by means of a drive belt wherein: the housing is formed of a drum having a bottom, and on the side facing away from the bottom has an open edge in that a lid with a bore for the passage of the rotor shaft is inserted on the open side of the drum facing away from the bottom, wherein the rotor shaft passes through the lid.
  • the housing forms a pump rotor receiving space whose cylindrical wall ends without constriction. As a result, the pump rotor can be pulled out of the housing to the open side.
  • the at the bottom facing away from the open side of the housing used also extendable lid with a hole for the passage of the rotor shaft is only the sealing of the room.
  • a bearing On the outer periphery of the drum forming the housing sits a bearing on which a wholly arranged outside the wall pulley ring is mounted.
  • the bearing does not hinder the extraction of the rotor.
  • the large diameter of the bearing and its small axial distance from the pump rotor ensures the precise guidance of the rotor, although it is only stored in a single bearing.
  • a coupling disc is screwed to the pulley ring rotatably and removably.
  • the dome disk in turn is rotatably connected to the rotor shaft or even with it in one piece.
  • the rotor shaft passes through the lid from the outside and protrudes into the pump room, in which it carries the rotor.
  • the latter together with the rotor shaft, the rotor and the cover, can be pulled out of the housing after the screw connection between the pulley ring and the coupling disk has been loosened.
  • the housing is either attached to an engine block of an internal combustion engine (claim 2) or it is in the engine block or a part thereof itself formed (claim 3).
  • claim 2 an engine block of an internal combustion engine
  • claim 3 the housing is either attached to an engine block of an internal combustion engine (claim 2) or it is in the engine block or a part thereof itself formed (claim 3).
  • the latter is a particularly cost-effective solution because no own pump housing is needed.
  • the overall length of the internal combustion engine can be shorter.
  • the cylindrical wall in the region of its edge facing away from the bottom has an outer shoulder and an inner Shoulder (claim 4). So are the bearing - a rolling bearing, preferably a ball bearing - and the lid accurately positioned. The same purpose is also an axial securing of the bearing and the lid by inserted into corresponding grooves of the cylindrical wall spring rings (claim 5). The spring rings or other securing means are accessible from the outside through openings in the dome disc (claim 6).
  • the sealing of the pump chamber is preferably carried out by seals in the lid, namely at its outer edge by a first sealing ring and in the bore by a second sealing ring for sealing to the rotor shaft (claim 7). Because when dismantling the pump, the cover is pulled out of the housing together with the pump shaft and the coupling disk, the second sealing ring arranged in this way, usually a sensitive lip sealing ring, can not be damaged.
  • the first sealing ring may be a simple O-ring, because there is no relative movement.
  • the invention is suitable for pumps of various types: centrifugal pumps, side channel pumps, vane pumps.
  • centrifugal pumps the inlet opens centrally in the bottom of the housing, in the two other types open inlet and outlet in a suitable manner.
  • the selection of the type of construction depends, inter alia, on whether it should promote pure cooling water, or whether it should promote dirty raw water from the environment (for example when using the internal combustion engine as a marine engine) for heat exchange with the closed engine cooling circuit.
  • the pump rotor in a preferred embodiment of the pump rotor is an impeller with elastically flexible wings whose axis is arranged eccentrically with respect to the circular cylindrical wall (claim 8).
  • the flexible wings of the pump rotor from their outer Edge inwardly extending recesses (claim 9). This allows larger contaminants to pass through the pump motor without damaging it.
  • Fig. 1 and especially in Fig. 2 is the engine block of an internal combustion engine with 1 and the water pump according to the invention summarily denoted by 2.
  • a channel 3 is indicated, for example, in the event that the water pump operates the engine cooling circuit directly.
  • the water pump 2 essentially comprises a housing 5 and a rotor 6.
  • the rotor is seated non-rotatably on a rotor shaft 7 with the axis 9.
  • the housing 5 is fastened to the engine block 1 by means of threaded bolts 13. It could also be made in one piece with the engine block 1.
  • the housing 5 has the shape of a drum 10 with a bottom 11 on the side facing the engine block 1 and ends on the side facing away from it with an open edge 12 whose smallest diameter is larger than the largest diameter of the rotor 6.
  • the drum has on its outer side an outer shoulder 15 and on its inner wall an inner shoulder 16.
  • the drum 10 is closed by a lid 14 which is positioned by engagement with the inner shoulder 16 and by a spreader 17 is secured.
  • the cover 14 has a bore 20 with a lip sealing ring 19 for the passage of the rotor shaft. 7
  • the water pump 2 is here a rotary vane pump and the housing forms a cylindrical inner wall, a connecting piece 8 is in Fig. 1 to see. But it could also be a pump of other operation, such as a centrifugal pump. Then the bottom 11 would have an inlet opening and the drum would be in the form of a screw.
  • a coupling plate 30 is provided for driving connection between the pulley ring 26 and the rotor shaft 7. It is detachably connected at its outer edge 28 by a number of bolts 31 with the pulley ring 26 and rotatably connected with its hub 32 with the rotor shaft 7.
  • the outer edge of the dome disc 30 is located on an axially normal mating surface 34 of the pulley collar 26 and with the surface 24th on the outer ring of the bearing.
  • the dome disk 30 between its outer edge and the hub 32 a number of openings through which the spreader 17 is accessible from the outside.
  • the expansion ring 17 is pulled by approaching its ends from its groove and the bolts 31 are released. And already the dome disk 30 can be pulled out of the housing 5 together with the rotor 6 and the cover 14. Of this, the pulley ring 26 is not affected, he remains unchanged on his camp.
  • Fig. 3 is as an addition to Fig. 2 to see a preferred embodiment of the water pump in cross section.
  • the rotor 6 is arranged eccentrically (axis 7).
  • the rotor 6 has a number of circumferentially distributed elastic wings 41, or it is made entirely of an elastic material.
  • the direction of rotation of the rotor 6 is indicated by the arrow 42.
  • the detail of Fig. 4 shows that the elastic wings 41 have outgoing recesses from their outer ends. They allow the passage of solid particles without damaging the wings 41.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Gegenstandobject

Die Erfindung betrifft Wasserpumpen, im Wesentlichen bestehend aus einem Gehäuse, einer Rotorwelle mit Pumprotor und einer mit der Welle verbundenen Riemenscheibe zum Antrieb der Pumpe mittels eines Keilriemens oder eines Zahnriemens.The invention relates to water pumps, essentially consisting of a housing, a rotor shaft with pump rotor and connected to the shaft pulley for driving the pump by means of a V-belt or a toothed belt.

Der Antrieb solcher Pumpen erfolgt gewöhnlich mittels eines Keil-, Flach- oder Zahnriemens. Die treibende Riemenscheibe sitzt meist auf der Kurbelwelle einer Verbrennungskraftmaschine. Oft treibt derselbe Riemen mehrere Aggregate. Mittels Zahnriemen wird auch eine Nockenwelle angetrieben. In diesem Fall ist nicht nur die richtige Riemenspannung zu wahren, sondern auch der Synchronismus zwischen Kurbelwelle und Nockenwelle. Dieser nämlich bestimmt die Schließzeiten der Gaswechselventile.The drive of such pumps usually takes place by means of a wedge, flat or toothed belt. The driving pulley is usually located on the crankshaft of an internal combustion engine. Often, the same belt drives multiple units. By means of a toothed belt, a camshaft is also driven. In this case, not only the correct belt tension is to be maintained, but also the synchronism between crankshaft and camshaft. This namely determines the closing times of the gas exchange valves.

Zum Austausch von Teilen der Pumpe (Dichtungen, Lager, Rotor) muss bei bekannten Pumpen der Riemen gelöst und nach Austausch auch wieder gespannt und gegebenenfalls synchronisiert werden.To replace parts of the pump (seals, bearings, rotor) must be solved in known pumps, the belt and after replacement also stretched again and possibly synchronized.

Stand der TechnikState of the art

Die FR 2.230.225 offenbart eine Pumpe für eine Verbrennungskraftmaschine, deren Gehäuse mit ihrem offenen, den Rotor aufnehmenden, Pumpraum am Zylinderblock anliegt und deren Boden von der Rotorwelle durchsetzt ist, wobei die mit der Rotorwelle verbundene Riemenscheibe auf einem einen Flansch des Gehäusebodens umgebenden Wälzlager gelagert ist. Für Wartungs- beziehungsweise Reparaturarbeiten muss der Treibriemen entfernt und die gesamte Pumpe vom Motorblock getrennt werden.The FR 2.230.225 discloses a pump for an internal combustion engine whose housing rests with its open, the rotor receiving, pumping space on the cylinder block and the bottom of which is penetrated by the rotor shaft, wherein the pulley connected to the rotor shaft is mounted on a surrounding a flange of the housing bottom roller bearing. For maintenance or repair work, the drive belt must be removed and the entire pump disconnected from the engine block.

Aus der JP 2004/052723 A ist eine Wasserpumpe bekannt, deren Gehäuse an der Antriebsseite so weit offen ist, dass der Rotor der Pumpe durch die Öffnung ausgezogen werden kann. Die Öffnung des Gehäuses ist von einem abnehmbaren Deckel verschlossen, der auf einem die Rotorwelle umgebenden Kragen ein den Kragen umgebendes Wälzlager für die Riemenscheibe hat. Diese Konstruktion erlaubt zwar den Ausbau des Pumpenrotors, doch nur mitsamt der Riemenscheibe, sodass zuvor der Treibriemen abgenommen werden muss. Zudem ist die Lagerung des Rotors mit nur einem Wälzlager geringen Durchmessers in großer axialer Entfernung vom Pumprotor kritisch.From the JP 2004/052723 A a water pump is known, the housing on the drive side is so far open that the rotor of the pump can be pulled out through the opening. The opening of the housing is closed by a removable cover, which has on a surrounding the rotor shaft collar surrounding the collar roller bearing for the pulley. Although this design allows the removal of the pump rotor, but only together with the pulley, so before the drive belt must be removed. In addition, the bearing of the rotor with only a small diameter rolling bearing at a large axial distance from the pump rotor is critical.

JPS5784331 offenbart eine Pumpe mit einem Gehäuse, einer Rotorwelle mit Pumprotor und einer mit der Welle verbundenen Riemenscheibe zum Antrieb der Pumpe mittels eines Treibriemens wobei: das Gehäuse aus einer Trommel mit einem Boden gebildet ist, und an der dem Boden abgewandten Seite einen offenen Rand hat, an der vom Boden abgewandten offenen Seite der Trommel ein Deckel mit einer Bohrung für den Durchtritt der Rotorwelle eingesetzt ist, wobei die Rotorwelle den Deckel durchsetzt.JPS5784331 discloses a pump having a housing, a rotor shaft with pumping rotor and a shaft connected to the pulley for driving the pump by means of a drive belt wherein: the housing is formed of a drum having a bottom, and on the side facing away from the bottom has an open edge in that a lid with a bore for the passage of the rotor shaft is inserted on the open side of the drum facing away from the bottom, wherein the rotor shaft passes through the lid.

Problem/LösungTroubleshooting

Es ist somit die der Erfindung zugrunde liegende Aufgabe, eine gattungsgemäße Pumpe so auszubilden, dass sie ohne Abnehmen des Treibriemens zerlegbar ist, und trotzdem eine stabile Lagerung der Rotorwelle mit einem einzigen Lager ermöglicht. Erfindungsgemäß wird das mit den kennzeichnenden Merkmalen des 1. Anspruchs erreicht.It is therefore the object underlying the invention to design a generic pump so that it can be disassembled without removing the drive belt, and still allows stable storage of the rotor shaft with a single bearing. According to the invention that is achieved with the characterizing features of the first claim.

Das Gehäuse bildet einen den Pumprotor aufnehmenden Raum, dessen zylindrische Wand ohne Einschnürung endet. Dadurch kann der Pumprotor nach der offenen Seite aus dem Gehäuse gezogen werden. Der an der dem Boden abgewandten offenen Seite des Gehäuses eingesetzte ebenfalls ausziehbare Deckel mit einer Bohrung für den Durchtritt der Rotorwelle dient nur der Abdichtung des Raumes.The housing forms a pump rotor receiving space whose cylindrical wall ends without constriction. As a result, the pump rotor can be pulled out of the housing to the open side. The at the bottom facing away from the open side of the housing used also extendable lid with a hole for the passage of the rotor shaft is only the sealing of the room.

Am äußeren Umfang der das Gehäuse bildenden Trommel sitzt ein Lager, auf dem ein zur Gänze außerhalb der Wand angeordneter Riemenscheibenkranz gelagert ist. Somit behindert das Lager nicht das Ausziehen des Rotors. Außerdem sichert der große Durchmesser des Lagers und sein kleiner axialer Abstand vom Pumprotor die präzise Führung des Rotors, obwohl er nur in einem einzigen Lager gelagert ist. Zur lösbaren Verbindung der Riemenscheibe mit dem Pumprotor ist an dem Riemenscheibenkranz eine Kuppelscheibe drehfest und abnehmbar angeschraubt. Die Kuppelscheibe ihrerseits ist mit der Rotorwelle drehfest verbunden oder gar mit ihr einstückig. Die Rotorwelle durchsetzt den Deckel von außen und ragt in den Pumpraum, in dem sie den Rotor trägt. Dadurch kann nach Lösen der Schraubverbindung zwischen Riemenscheibenkranz und Kuppelscheibe letztere mitsamt der Rotorwelle, dem Rotor und dem Deckel aus dem Gehäuse gezogen werden.On the outer periphery of the drum forming the housing sits a bearing on which a wholly arranged outside the wall pulley ring is mounted. Thus, the bearing does not hinder the extraction of the rotor. In addition, the large diameter of the bearing and its small axial distance from the pump rotor ensures the precise guidance of the rotor, although it is only stored in a single bearing. For detachable connection of the pulley with the pump rotor, a coupling disc is screwed to the pulley ring rotatably and removably. The dome disk in turn is rotatably connected to the rotor shaft or even with it in one piece. The rotor shaft passes through the lid from the outside and protrudes into the pump room, in which it carries the rotor. As a result, the latter, together with the rotor shaft, the rotor and the cover, can be pulled out of the housing after the screw connection between the pulley ring and the coupling disk has been loosened.

Das Gehäuse ist entweder an einem Motorblock einer Verbrennungskraftmaschine befestigt (Anspruch 2) oder es ist im Motorblock oder einem Teil dessen selbst ausgebildet (Anspruch 3). Letzteres ist eine besonders kostengünstige Lösung, weil kein eigenes Pumpengehäuse benötigt wird. Außerdem kann so die Baulänge der Verbrennungskraftmaschine kürzer sein.The housing is either attached to an engine block of an internal combustion engine (claim 2) or it is in the engine block or a part thereof itself formed (claim 3). The latter is a particularly cost-effective solution because no own pump housing is needed. In addition, the overall length of the internal combustion engine can be shorter.

In einer bevorzugten Ausführungsform hat die zylindrische Wand in der Region ihres vom Boden abgewandten Randes eine äußere Schulter und eine innere Schulter (Anspruch 4). So sind das Lager - ein Wälzlager, vorzugsweise ein Kugellager - und der Deckel genau positioniert. Demselben Zweck dient auch eine axiale Sicherung des Lagers und des Deckels durch in entsprechende Nuten der zylindrischen Wand eingesetzte Federringe (Anspruch 5). Die Federringe oder andere Sicherungsmittel sind von außen durch Durchbrüche in der Kuppelscheibe zugänglich (Anspruch 6).In a preferred embodiment, the cylindrical wall in the region of its edge facing away from the bottom has an outer shoulder and an inner Shoulder (claim 4). So are the bearing - a rolling bearing, preferably a ball bearing - and the lid accurately positioned. The same purpose is also an axial securing of the bearing and the lid by inserted into corresponding grooves of the cylindrical wall spring rings (claim 5). The spring rings or other securing means are accessible from the outside through openings in the dome disc (claim 6).

Die Abdichtung des Pumpraumes erfolgt vorzugsweise durch Dichtungen im Deckel, und zwar an seinem äußeren Rand durch einen ersten Dichtring und in der Bohrung durch einen zweiten Dichtring zur Abdichtung an der Rotorwelle (Anspruch 7). Weil beim Zerlegen der Pumpe der Deckel zusammen mit der Pumpwelle und der Kuppelscheibe aus dem Gehäuse gezogen wird, kann der so angeordnete zweite Dichtring, meist ein empfindlicher Lippendichtring, nicht beschädigt werden. Der erste Dichtring kann ein einfacher O-Ring sein, weil dort keine Relativbewegung.The sealing of the pump chamber is preferably carried out by seals in the lid, namely at its outer edge by a first sealing ring and in the bore by a second sealing ring for sealing to the rotor shaft (claim 7). Because when dismantling the pump, the cover is pulled out of the housing together with the pump shaft and the coupling disk, the second sealing ring arranged in this way, usually a sensitive lip sealing ring, can not be damaged. The first sealing ring may be a simple O-ring, because there is no relative movement.

Die Erfindung eignet sich für Pumpen verschiedener Bauart: Zentrifugalpumpen, Seitenkanalpumpen, Flügelzellenpumpen. Bei Zentrifugalpumpen mündet der Zulauf zentral im Boden des Gehäuses, bei den beiden anderen Bauarten münden Zulauf und Ablauf in geeigneter Weise. Die Auswahl der Bauart hängt unterem anderen davon ab, ob sie reines Kühlwasser fördern soll, oder ob sie schmutziges Rohwasser aus der Umgebung (zum Beispiel bei Einsatz der Verbrennungskraftmaschine als Schiffsmotor) zum Wärmetausch mit dem geschlossenen Motorkühlkreislauf fördern soll.The invention is suitable for pumps of various types: centrifugal pumps, side channel pumps, vane pumps. In centrifugal pumps, the inlet opens centrally in the bottom of the housing, in the two other types open inlet and outlet in a suitable manner. The selection of the type of construction depends, inter alia, on whether it should promote pure cooling water, or whether it should promote dirty raw water from the environment (for example when using the internal combustion engine as a marine engine) for heat exchange with the closed engine cooling circuit.

In letzterem Fall ist in einer bevorzugten Ausführungsform der Pumprotor ein Flügelrad mit elastisch flexiblen Flügeln, dessen Achse bezüglich der kreiszylindrischen Wand exzentrisch angeordnet ist (Anspruch 8). In einer zweckmäßigen Weiterbildung haben die flexiblen Flügel des Pumprotors von ihrer äußeren Kante nach innen verlaufende Aussparungen (Anspruch 9). Dadurch können größere Verunreinigungen den Pumprotor passieren ohne ihn zu beschädigen.In the latter case, in a preferred embodiment of the pump rotor is an impeller with elastically flexible wings whose axis is arranged eccentrically with respect to the circular cylindrical wall (claim 8). In an expedient development, the flexible wings of the pump rotor from their outer Edge inwardly extending recesses (claim 9). This allows larger contaminants to pass through the pump motor without damaging it.

Insgesamt wird mit der Erfindung das Hauptziel, ein Zerlegen der Pumpe ohne Abnehmen des Treibriemens bei einfacher und präziser Lagerung des Rotors zu ermöglichen, vollständig erreicht.Overall, with the invention, the main objective to enable a disassembly of the pump without removing the drive belt with simple and precise storage of the rotor, completely achieved.

Figurencharacters

Fig. 1:Fig. 1:
Einen Längsschnitt durch eine bevorzugte Ausführungsform der Erfindung,A longitudinal section through a preferred embodiment of the invention,
Fig. 2:Fig. 2:
Eine Frontalansicht nach II in Fig. 1.A frontal view after II in Fig. 1 ,
Fig. 3:3:
Schnitt nach III-III in Fig. 2.Section III-III in Fig. 2 ,
Fig. 4:4:
Detail IV-IV in Fig. 3.Detail IV-IV in Fig. 3 ,
Beschreibungdescription

In Fig. 1 und vor allem in Fig. 2 ist der Motorblock einer Verbrennungskraftmaschine mit 1 und die erfindungsgemäße Wasserpumpe summarisch mit 2 bezeichnet. Im Motorblock 1 ist ein Kanal 3 angedeutet, beispielsweise für den Fall dass die Wasserpumpe den Motorkühlkreislauf direkt bedient.In Fig. 1 and especially in Fig. 2 is the engine block of an internal combustion engine with 1 and the water pump according to the invention summarily denoted by 2. In the engine block 1, a channel 3 is indicated, for example, in the event that the water pump operates the engine cooling circuit directly.

Die Wasserpumpe 2 umfasst im Wesentlichen ein Gehäuse 5 und einen Rotor 6. Der Rotor sitzt drehfest auf einer Rotorwelle 7 mit der Achse 9. Das Gehäuse 5 Ist mittels Schraubbolzen 13 am Motorblock 1 befestigt. Es könnte aber auch mit dem Motorblock 1 einstückig ausgeführt sein. Das Gehäuse 5 hat die Form einer Trommel 10 mit einem Boden 11 an der dem Motorblock 1 zugewandten Seite und endet an der ihm abgewandten Seite mit einem offenen Rand 12, dessen kleinster Durchmesser größer als der größte Durchmesser des Rotors 6 ist.The water pump 2 essentially comprises a housing 5 and a rotor 6. The rotor is seated non-rotatably on a rotor shaft 7 with the axis 9. The housing 5 is fastened to the engine block 1 by means of threaded bolts 13. It could also be made in one piece with the engine block 1. The housing 5 has the shape of a drum 10 with a bottom 11 on the side facing the engine block 1 and ends on the side facing away from it with an open edge 12 whose smallest diameter is larger than the largest diameter of the rotor 6.

Dadurch kann der Rotor 6 aus dem Gehäuse 5 herausgezogen werden. Weiters hat die Trommel an ihrer Außenseite eine äußere Schulter 15 und an ihrer Innenwand eine innere Schulter 16. An ihrer dem Motorblock 1 abgewandten Seite ist die Trommel 10 von einem Deckel 14 verschlossen, der durch Anlage an der innere Schulter 16 positioniert und von einem Spreizring 17 gesichert ist. Der Deckel 14 hat eine Bohrung 20 mit einem Lippendichtring 19 für den Durchtritt der Rotorwelle 7.As a result, the rotor 6 can be pulled out of the housing 5. Furthermore, the drum has on its outer side an outer shoulder 15 and on its inner wall an inner shoulder 16. On its side facing away from the engine block 1, the drum 10 is closed by a lid 14 which is positioned by engagement with the inner shoulder 16 and by a spreader 17 is secured. The cover 14 has a bore 20 with a lip sealing ring 19 for the passage of the rotor shaft. 7

Die Wasserpumpe 2 ist hier eine Drehflügelpumpe und das Gehäuse bildet eine zylindrische Innenwand, ein Anschlussstutzen 8 ist in Fig. 1 zu sehen. Sie könnte aber auch eine Pumpe anderer Arbeitsweise, beispielsweise eine Zentrifugalpumpe sein. Dann hätte der Boden 11 eine Einlassöffnung und die Trommel die Form einer Schnecke.The water pump 2 is here a rotary vane pump and the housing forms a cylindrical inner wall, a connecting piece 8 is in Fig. 1 to see. But it could also be a pump of other operation, such as a centrifugal pump. Then the bottom 11 would have an inlet opening and the drum would be in the form of a screw.

Bemerkenswert ist die Lagerung aller rotierenden Teile in einem einzigen Wälzlager. Am äußeren Umfang der Trommel 10 sitzt ein als Festlager ausgebildetes Kugellager 22. Sein Innenring ist zwischen der äußeren Schulter 15 des Gehäuses 5 und einem Sprengring 25 und sein Außenring zwischen den achsnormalen Flächen 23 und 25 positioniert. Auf dem Kugellager 22 ist ein Riemenscheibenkranz 26, hier für einen Zahnriemen 27, gelagert. Es könnte aber auch ein irgendein Transmissionsriemen, beispielsweise ein Keilriemen sein.Noteworthy is the storage of all rotating parts in a single rolling bearing. Its inner ring is positioned between the outer shoulder 15 of the housing 5 and a snap ring 25 and its outer ring between the axially normal surfaces 23 and 25 on the outer circumference of the drum 10. On the ball bearing 22, a pulley ring 26, here for a toothed belt 27, stored. But it could also be any transmission belt, such as a V-belt.

Zur treibenden Verbindung zwischen dem Riemenscheibenkranz 26 und der Rotorwelle 7 ist eine Kuppelscheibe 30 vorgesehen. Sie ist an ihrem äußeren Rand 28 durch eine Anzahl Bolzen 31 mit dem Riemenscheibenkranz 26 lösbar verbunden und mit ihrer Nabe 32 drehfest mit der Rotorwelle 7 verbunden. Zur genauen Positionierung liegt der äußere Rand der Kuppelscheibe 30 an einer achsnormalen Passfläche 34 des Riemenscheibenkranzes 26 und mit der Fläche 24 am Außenring des Wälzlagers an. Wie in Fig. 1 zu sehen, hat die Kuppelscheibe 30 zwischen ihrem äußeren Rand und der Nabe 32 eine Anzahl Durchbrüche, durch die der Spreizring 17 von außen zugänglich ist.For driving connection between the pulley ring 26 and the rotor shaft 7, a coupling plate 30 is provided. It is detachably connected at its outer edge 28 by a number of bolts 31 with the pulley ring 26 and rotatably connected with its hub 32 with the rotor shaft 7. For accurate positioning, the outer edge of the dome disc 30 is located on an axially normal mating surface 34 of the pulley collar 26 and with the surface 24th on the outer ring of the bearing. As in Fig. 1 see, the dome disk 30 between its outer edge and the hub 32 a number of openings through which the spreader 17 is accessible from the outside.

Ist der Pumpenrotor 6 oder der Dichtring 19 auszuwechseln, wird der Spreizring 17 durch Annähern seiner Enden aus seiner Nut gezogen und werden die Bolzen 31 gelöst. Und schon kann die Kuppelscheibe 30 mitsamt dem Rotor 6 und dem Deckel 14 aus dem Gehäuse 5 gezogen werden. Davon ist der Riemenscheibenkranz 26 nicht betroffen, er bleibt unverrückt auf seinem Lager.If the pump rotor 6 or the sealing ring 19 to replace 19, the expansion ring 17 is pulled by approaching its ends from its groove and the bolts 31 are released. And already the dome disk 30 can be pulled out of the housing 5 together with the rotor 6 and the cover 14. Of this, the pulley ring 26 is not affected, he remains unchanged on his camp.

In Fig. 3 ist als Ergänzung zu Fig. 2 noch eine bevorzugte Ausführungsform der Wasserpumpe im Querschnitt zu sehen. In dem von dem trommelförmigen Gehäuse 10 mit den Anschlussstutzen 8, 8' gebildeten Pumpraum 40 ist exzentrisch (Achse 7) der Rotor 6 angeordnet. Der Rotor 6 hat eine Anzahl über den Umfang verteilter elastischer Flügel 41, oder er besteht ganz aus einem elastischen Werkstoff. Der Drehsinn des Rotors 6 ist mit dem Pfeil 42 angezeigt. Das Detail der Fig. 4 zeigt noch, dass die elastischen Flügel 41 von ihren äußeren Enden ausgehende Aussparungen haben. Sie erlauben den Durchtritt von festen Teilchen ohne die Flügel 41 zu beschädigen.In Fig. 3 is as an addition to Fig. 2 to see a preferred embodiment of the water pump in cross section. In the pump chamber 40 formed by the drum-shaped housing 10 with the connecting pieces 8, 8 ', the rotor 6 is arranged eccentrically (axis 7). The rotor 6 has a number of circumferentially distributed elastic wings 41, or it is made entirely of an elastic material. The direction of rotation of the rotor 6 is indicated by the arrow 42. The detail of Fig. 4 shows that the elastic wings 41 have outgoing recesses from their outer ends. They allow the passage of solid particles without damaging the wings 41.

Claims (9)

  1. Water pump, essentially comprising a casing (5), a rotor shaft (7) with a pump rotor (6) and a pulley connected with the shaft (7) for driving the pump by means of a belt (27), wherein
    a) The casing (5) is a drum (10) with a bottom (11) and an open edge (12) at the side opposite the bottom(11),
    b) A lid (14) is fitted to the open side of the drum (10) opposite the bottom (11), the lid (14) having a bore (20) through which the rotor shaft (7) passes,
    c) A bearing (22) is disposed on the outer circumference of the drum (10), whereon a pulley ring (26) is journalled,
    d) A coupling disk (30) is removably fixed to the pulley ring (26) and coupled to the rotor shaft (11) or in one piece with it.
  2. Water pump according to claim 1, caracterized in that the casing (5) is screwed on to the engine block (1) of a combustion engine or to a part of the engine block.
  3. Water pump according to claim 1, caracterized in that the casing (5) is in one piece with the engine block (1) of a combustion engine or with a part of the engine block.
  4. Water pump according to claim 1, caracterized in that the drum (10) has an outer shoulder (15) and an inner shoulder (16) in the region of the edge (12), the outer (15) for positioning the bearing (22), the inner (16) for positioning the lid (14).
  5. Water pump according to claim 1, caracterized in that thethe bearing (22) and the lid (14) are secured by retaining rings (17,25).
  6. Water pump according to claim 1, caracterized in that the coupling disk (30) has openings (33).
  7. Water pump according to claim 1, caracterized in that the lid (14) holds a first sealing ring (18) at ist outer edge and a second sealing ring (19) in the bore (20).
  8. Water pump according to claim 1, caracterized in that the pump rotor (6) is a vaned wheel with and its axis (9) located excentrically with regard to the cylindrical inner wall oft he drum (10).
  9. Water pump according to claim 8, caracterized in that the resiliently flexible wings (41) of the pump rotor (6) have revesses (43) extending inside from their outer edge (44).
EP11008643.6A 2010-11-09 2011-10-28 Water pump for a combustion engine Not-in-force EP2450547B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0068310U AT12267U1 (en) 2010-11-09 2010-11-09 WATER PUMP FOR A COMBUSTION ENGINE

Publications (3)

Publication Number Publication Date
EP2450547A2 EP2450547A2 (en) 2012-05-09
EP2450547A3 EP2450547A3 (en) 2016-11-09
EP2450547B1 true EP2450547B1 (en) 2017-08-30

Family

ID=45217921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11008643.6A Not-in-force EP2450547B1 (en) 2010-11-09 2011-10-28 Water pump for a combustion engine

Country Status (2)

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EP (1) EP2450547B1 (en)
AT (1) AT12267U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4053413A1 (en) * 2021-03-04 2022-09-07 Volvo Car Corporation Crankshaft mounted pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2230225A5 (en) 1973-05-14 1974-12-13 Peugeot & Renault
GB1461901A (en) * 1975-06-23 1977-01-19 Skf Uk Ltd Water pumps for internal combustion engines
JPS5784331U (en) * 1980-11-13 1982-05-25
EP1188931B1 (en) * 2000-09-19 2007-05-30 Aisin Seiki Kabushiki Kaisha Water pump
JP2004052723A (en) 2002-07-23 2004-02-19 Aisin Seiki Co Ltd Water pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP2450547A2 (en) 2012-05-09
AT12267U1 (en) 2012-02-15
EP2450547A3 (en) 2016-11-09

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