WO2012004544A1 - Reversible-drive water pump - Google Patents

Reversible-drive water pump Download PDF

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Publication number
WO2012004544A1
WO2012004544A1 PCT/FR2011/051630 FR2011051630W WO2012004544A1 WO 2012004544 A1 WO2012004544 A1 WO 2012004544A1 FR 2011051630 W FR2011051630 W FR 2011051630W WO 2012004544 A1 WO2012004544 A1 WO 2012004544A1
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WO
WIPO (PCT)
Prior art keywords
pulley
water pump
wheel
pinions
axis
Prior art date
Application number
PCT/FR2011/051630
Other languages
French (fr)
Inventor
Philippe Gauthier
Original Assignee
Renault S.A.S.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Renault S.A.S. filed Critical Renault S.A.S.
Publication of WO2012004544A1 publication Critical patent/WO2012004544A1/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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/028—Units comprising pumps and their driving means the driving means being a planetary gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts

Definitions

  • the invention relates to a water pump whose direction of rotation of the blade can be reversed with respect to the direction of rotation of the pulley.
  • a water pump circulates a fluid in a cooling circuit and thus regulates the engine temperature.
  • the water pump comprises in particular a pulley, which causes a blade, or turbine, adapted to circulate the fluid in the cooling circuit.
  • the pulley of the water pump is driven by a drive belt, which generally drives other vehicle components such as the alternator, the power steering pump, and so on.
  • the drive belt is generally notched or striated.
  • belt will be used to define the transmission belt acting on the drive pulley of the water pump.
  • streak means all types of grooves, grooves or teeth vee clearly known for this type of belt.
  • the belt is made to follow a longer or shorter path, passing through pulleys and tensioning rollers to ensure optimum tension of the belt.
  • the water pump is positioned so that, if the path of the transmission belt is not changed, the blade rotates in the opposite direction to that for which it is destiny. It is then necessary to add another belt length, pulleys and / or tensioner rollers in order to drive the blade in the right direction. Such additions generate, in addition to the complexity of the path of the belt, an additional cost that can be important.
  • the pulley of the water pump may be driven by the back of the toothed or serrated belt, which may in particular cause sliding, generating premature wear of the belt.
  • a water pump comprising a pump body adapted to maintain in position at least one axis A'A on which is secured a blade, the blade being driven by a drive pulley, characterized in that that the water pump comprises a device adapted to reverse the direction of rotation between the blade and the drive pulley. More particularly, the device is disposed between the blade and the drive pulley.
  • Such a water pump can in particular make it possible to limit the length of the belt used, to simplify the architecture of the engine and to eliminate any additions of return pulleys and / or tensioning rollers.
  • Such a water pump can also help ensure the driving of the drive pulley by the notched or striated face of the belt, thus limiting the risk of slippage.
  • the device used is entirely mechanical, which can increase the reliability of the water pump and reduce construction costs and maintenance.
  • the device connects the drive pulley to the axis and is designed to allow the axis to rotate in the same direction or in the opposite direction as the drive pulley.
  • the device may comprise at least three pinions mounted free to rotate respectively on axes B'B, C'C and D'D, the axes B'B, C'C and D'D (not shown for reasons of clarity) belonging to the pump body, the pinions being engaged on the one hand with the pulley and on the other hand with a wheel, the pulley being mounted free to rotate on the axis A'A, the wheel being secured on the axis A'A.
  • the pulley, pinion and wheel device is an epicyclic gear train and the pinions are driven by the inner circumference of the pulley.
  • the B'B, C'C and D'D axes are angularly spaced by 120 °.
  • the use of an epicyclic gear can also allow to have a determined drive ratio between the pulley, the pinions and the wheel.
  • the drive ratio may in particular allow to drive the blade faster than the pulley for example to increase the speed of circulation of the fluid in the cooling circuit.
  • each pinion can be rotatably mounted on an axis B'B, C'C, D'D of the pump body via a stepped screw.
  • shouldered screws may in particular make it possible to ensure the axial play of operation necessary for the gears to rotate about their respective axes.
  • the engagement between the pulley, the pinions and the wheel can be achieved by a toothing.
  • the toothing may be straight toothing or helical toothing.
  • the transmission by toothing may in particular to limit slippage between the elements.
  • the engagement between the pulley, the pinions and the wheel can be achieved by friction.
  • the friction drive may in particular allow to ensure a low operating noise of the water pump.
  • the drive pulley, the pinions and / or the wheel may be made or covered with an elastomeric material.
  • elastomer a polymeric material having elastic properties.
  • the wheel can be made in one piece with the axis.
  • the wheel can be cut in the mass with the axis, which can reduce the manufacturing cost of the pump and ensure greater strength of the wheel-axle assembly.
  • the pump may comprise a system capable of releasing the pinions from their respective axes B'B, C'C or D'D and to secure at least one of the pinions released with the pulley and / or the wheel.
  • the joining of one of the pinions with the pulley or the wheel makes it possible to obtain that the direction of rotation of the pulley takes place in the same direction as the direction of rotation of the blade.
  • the system may comprise at least one rigid element adapted to secure one of the pinions released to the pulley and / or the wheel.
  • the rigid element may be a pin through orifices passing through the wheel and / or the pulley on the one hand and the pinion released on the other hand.
  • the orifices pass axially through the pinion and the pulley and / or the wheel.
  • the rigid element may also be a screw passing through the two orifices, at least one of which is threaded.
  • the rigid element may be a plate shaped to connect the released pinion and the wheel, the plate being secured by screwing, clipping or soldering to the released pinion and to the wheel.
  • the water pump according to the invention will be used to ensure the circulation of a cooling fluid of a vehicle engine.
  • the water pump can then be driven by the engine drive belt.
  • This provides a compact and reliable pump that can be easily integrated into the engine environment because it is possible to choose the direction of rotation of its blade.
  • FIG. 1 is a sectional representation of an embodiment of a water pump according to the invention
  • Figure 2 is a schematic representation of an embodiment of a water pump according to the invention.
  • FIGS. 1 and 2 show a water pump 1 comprising a body 10 traversed on either side by an axis 20.
  • the axis 20 is immobilized radially and axially by a ball bearing 21.
  • a plurality of bearings could be envisaged or a double row ball bearing to guarantee the stability and the maintenance of the shaft 20 in the pump body 10.
  • One of the ends of the axis 20 supports a blade 30 adapted to the flow of fluid in the cooling circuit, the other end supports a drive pulley 40 adapted to drive by a transmission belt.
  • the blade 30 is secured to the axis 20 for example by a key device well known to those skilled in the art.
  • a key device well known to those skilled in the art.
  • the water / air tightness between the shaft 20 and the body 10, intended to prevent the coolant from entering the water pump and damaging the bearing 2 1, is provided by an element of dynamic sealing 60 such as a lip seal and more particularly an O-ring guaranteeing excellent sealing.
  • the drive pulley 40 is immobilized radially and axially on the axis 20 by a bearing 41.
  • a cover 70 is fixed on the outer end of the pulley 40.
  • the outer circumference of the pulley 40 includes a set of ridges 45 adapted to facilitate belt drive (not shown). It could be envisaged that the outer circumference of the pulley 40 does not include ridges, which would however increase the slippage of the belt on the pulley and cause premature wear of the belt.
  • the inner circumference of the pulley 40 also called large crown, causes a set of three pinions 52, 52 'and 52 "(not shown in the figures for the sake of clarity) also called satellites, which in turn drive a wheel 22 , Also called central sun gear, integral with the axis 20. This assembly thus forms an epicyclic gear 50 well known to those skilled in the art.
  • the drive between the pulley 40, the pinions 52 and the wheel 22 takes place, according to the example shown, by friction.
  • the surfaces in contact with the pulley 40, the pinions 52 and the wheel 22 may be wholly or partly composed or covered with an elastomeric material.
  • the drive between the pulley 40, the pinions 52 and the wheel could also be achieved by a set of teeth, straight or helical.
  • Each pinion 52, 52 'and 52 is free to rotate about an axis, respectively, B'B, C'C and D'D (not shown for the sake of clarity) .
  • These axes B'B, C' C and D'D are angularly spaced apart by 120 °
  • the pinion 52 is held in translation and free to rotate on the pump body 10 by means of a shoulder screw 12 enabling to provide the axial play of operation necessary for rotation about the axis B'B of the pinion 52.
  • the same type of assembly is also applicable to the other pinions 52 'and 52 ".
  • each pinion 52 is an element 1 1 acting as a wedge share for adjusting the clearance and on the other hand sealing element, preventing dust from entering the pinions 52.
  • the wheel 22 is preferably cut in the mass with the axis 20, which provides a low manufacturing cost while ensuring excellent strength of the entire shaft 20 and wheel 22.
  • the pinions 52 also turn clockwise and drive the wheel 22, and by extension the blade 30, counterclockwise. This produces a water pump whose direction of rotation of the blade 30 is reversed relative to the direction of rotation of the pulley 40.
  • the pump 1 advantageously comprises any type of system capable of releasing the pinions 52, 52 'or 52 "of their respective axes B'B, C'C or D'D and to secure at least one of the released gears 52, 52', 52 "with pulley 40 and / or wheel 22.
  • a water pump as described above can therefore provide a reliable mechanical product for a low cost that can allow to choose the direction of rotation of the blade, regardless of the direction of rotation of the pulley, for example when the manufacture of the water pump or when setting up the water pump in the vehicle.

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

Abstract

The invention relates to a water pump (1) comprising a pump housing (10) capable of holding in position at least one shaft (20) to which an impellor (30) is secured, the impellor (30) being driven by a drive pulley (40), characterized in that the water pump (1) comprises a device (50) capable of reversing the direction of rotation between the impellor (30) and the pulley (40).

Description

Pompe à eau à entraînement réversible  Water pump with reversible drive
L'invention concerne une pompe à eau dont le sens de rotation de l'aube peut être inversé par rapport au sens de rotation de la poulie. The invention relates to a water pump whose direction of rotation of the blade can be reversed with respect to the direction of rotation of the pulley.
Dans un moteur de véhicule, une pompe à eau permet de faire circuler un fluide dans un circuit de refroidissement permettant ainsi de réguler la température du moteur. In a vehicle engine, a water pump circulates a fluid in a cooling circuit and thus regulates the engine temperature.
La pompe à eau comprend notamment une poulie, qui entraine une aube, ou turbine, adaptée pour faire circuler le fluide dans le circuit de refroidissement. La poulie de la pompe à eau est entraînée par une courroie de transmission, qui entraine en règle générale d'autres éléments du véhicule tels que l'alternateur, la pompe de direction assistée, etc. Afin de limiter les glissements avec les éléments à entraîner, la courroie de transmission est généralement crantée ou striée. The water pump comprises in particular a pulley, which causes a blade, or turbine, adapted to circulate the fluid in the cooling circuit. The pulley of the water pump is driven by a drive belt, which generally drives other vehicle components such as the alternator, the power steering pump, and so on. To limit slippage with the elements to be driven, the drive belt is generally notched or striated.
Pour la suite de la description, le terme courroie sera utilisé pour définir la courroie de transmission qui agit sur la poulie d 'entraînement de la pompe à eau. De même, on entend par le terme strie tous types de stries, rainures ou dentures en vé clairement connus pour ce type de courroie. For the rest of the description, the term belt will be used to define the transmission belt acting on the drive pulley of the water pump. Similarly, the term streak means all types of grooves, grooves or teeth vee clearly known for this type of belt.
En fonction du positionnement des différents éléments dans l'architecture du moteur, la courroie est amenée à suivre un chemin plus ou moins long, passant par des poulies de renvois et des galets tendeurs permettant d'assurer une tension optimum de la courroie. Depending on the positioning of the various elements in the architecture of the motor, the belt is made to follow a longer or shorter path, passing through pulleys and tensioning rollers to ensure optimum tension of the belt.
Dans certaines configurations de l'architecture du moteur, la pompe à eau est positionnée de telle sorte que, si l'on ne modifie pas le chemin de la courroie de transmission, l'aube tourne dans le sens contraire à celui pour laquelle elle est destinée. Il est alors nécessaire d'ajouter encore une longueur de courroie, des poulies de renvois et/ou des galets tendeur afin de pouvoir entraîner l'aube dans le bon sens. De tels ajouts génèrent, en plus de la complexité du chemin de la courroie, un coût additionnel qui peut s'avérer important. De plus, dans ce genre de configuration, la poulie de la pompe à eau peut se trouver entraînée par le dos de la courroie crantée ou striée, ce qui peut notamment provoquer des glissements, générant une usure prématurée de la courroie. In certain configurations of the motor architecture, the water pump is positioned so that, if the path of the transmission belt is not changed, the blade rotates in the opposite direction to that for which it is destiny. It is then necessary to add another belt length, pulleys and / or tensioner rollers in order to drive the blade in the right direction. Such additions generate, in addition to the complexity of the path of the belt, an additional cost that can be important. In addition, in this type of configuration, the pulley of the water pump may be driven by the back of the toothed or serrated belt, which may in particular cause sliding, generating premature wear of the belt.
On cherche donc à proposer une pompe à eau dont le sens de rotation de l'aube ne dépend pas du sens de rotation de la poulie d'entrainement. It is therefore sought to provide a water pump whose direction of rotation of the blade does not depend on the direction of rotation of the drive pulley.
A cet effet, il est proposé une pompe à eau comprenant un corps de pompe apte à maintenir en position au moins un axe A'A sur lequel est solidarisé une aube , l 'aube étant entraînée par une poulie d'entrainement, caractérisé en ce que la pompe à eau comprend un dispositif apte à inverser le sens de rotation entre l'aube et la poulie d'entrainement. Plus particulièrement, le dispositif est disposé entre l'aube et la poulie d'entrainement. For this purpose, it is proposed a water pump comprising a pump body adapted to maintain in position at least one axis A'A on which is secured a blade, the blade being driven by a drive pulley, characterized in that that the water pump comprises a device adapted to reverse the direction of rotation between the blade and the drive pulley. More particularly, the device is disposed between the blade and the drive pulley.
Une telle pompe à eau peut notamment permettre de limiter la longueur de courroie utilisée, de simplifier l'architecture du moteur et de supprimer les éventuels ajouts de poulies de renvois et/ou de galets tendeurs. Such a water pump can in particular make it possible to limit the length of the belt used, to simplify the architecture of the engine and to eliminate any additions of return pulleys and / or tensioning rollers.
Une telle pompe à eau peut également permettre d'assurer l'entraînement de la poulie d'entrainement par la face crantée, ou striée, de la courroie, limitant ainsi les risques de glissement. Such a water pump can also help ensure the driving of the drive pulley by the notched or striated face of the belt, thus limiting the risk of slippage.
Avantageusement, le dispositif utilisé est entièrement mécanique, ce qui peut permettre d'augmenter la fiabilité de la pompe à eau et d'en limiter les coûts de construction et d'entretiens. Advantageously, the device used is entirely mechanical, which can increase the reliability of the water pump and reduce construction costs and maintenance.
Par entièrement mécanique, on comprendra un dispositif qui ne comprend par d'élément magnétique et/ ou électrique permettant d'inverser le sens de rotation entre la poulie d'entrainement et l'aube. By fully mechanical, it will be understood a device which comprises no magnetic element and / or electrical to reverse the direction of rotation between the drive pulley and the blade.
Avantageusement, le dispositif relie la poulie d'entrainement à l'axe et est conçu de manière à permettre à l'axe de tourner dans le même sens ou dans le sens contraire que la poulie d'entrainement. Plus particulièrement, le dispositif peut comprendre au moins trois pignons montés libres en rotation respectivement sur des axes B'B, C'C et D'D, les axes B'B, C'C et D'D (non représenté pour des raisons de clarté) appartenant au corps de pompe, les pignons étant en prise d'une part avec la poulie et d'autre part avec une roue, la poulie étant montée libre en rotation sur l'axe A'A, la roue étant solidarisée sur l'axe A'A. Advantageously, the device connects the drive pulley to the axis and is designed to allow the axis to rotate in the same direction or in the opposite direction as the drive pulley. More particularly, the device may comprise at least three pinions mounted free to rotate respectively on axes B'B, C'C and D'D, the axes B'B, C'C and D'D (not shown for reasons of clarity) belonging to the pump body, the pinions being engaged on the one hand with the pulley and on the other hand with a wheel, the pulley being mounted free to rotate on the axis A'A, the wheel being secured on the axis A'A.
En particulier, le dispositif poulie, pignon et roue est un train épicycloïdal et les pignons sont entraînés par la circonférence intérieure de la poulie. In particular, the pulley, pinion and wheel device is an epicyclic gear train and the pinions are driven by the inner circumference of the pulley.
Plus particulièrement, les axes B'B, C'C et D'D sont angulairement espacés de 120°. More particularly, the B'B, C'C and D'D axes are angularly spaced by 120 °.
L'utilisation d'un train épicycloïdal peut également permettre d'avoir un rapport d 'entraînement déterminé entre la poulie, les pignons et la roue. Le rapport d 'entraînement peut notamment permettre d'entraîner l'aube plus rapidement que la poulie afin par exemple d'augmenter la vitesse de circulation du fluide dans le circuit de refroidissement. The use of an epicyclic gear can also allow to have a determined drive ratio between the pulley, the pinions and the wheel. The drive ratio may in particular allow to drive the blade faster than the pulley for example to increase the speed of circulation of the fluid in the cooling circuit.
Avantageusement, chaque pignon peut être monté libre en rotation sur un axe B'B, C'C, D'D du corps de pompe par l'intermédiaire d'une vis épaulée. Advantageously, each pinion can be rotatably mounted on an axis B'B, C'C, D'D of the pump body via a stepped screw.
L'utilisation de vis épaulée peut notamment permettre d'assurer le jeu axial de fonctionnement nécessaire aux pignons pour leur rotation autour de leur axe respectif. Selon un mode de réalisation particulier, la mise en prise entre la poulie, les pignons et la roue peut être réalisée par une denture. The use of shouldered screws may in particular make it possible to ensure the axial play of operation necessary for the gears to rotate about their respective axes. According to a particular embodiment, the engagement between the pulley, the pinions and the wheel can be achieved by a toothing.
Avantageusement, la denture peut être une denture droite ou une denture hélicoïdale. La transmission par denture peut notamment permettre de limiter les glissements entre les éléments. Selon un autre mode de réalisation, la mise en prise entre la poulie, les pignons et la roue peut être réalisée par friction. Avantageusement, l'entraînement par friction peut notamment permettre d'assurer un faible bruit de fonctionnement de la pompe à eau. En particulier, la poulie d'entrainement, les pignons et/ ou la roue peuvent être réalisés ou recouverts d'un matériau élastomère. Advantageously, the toothing may be straight toothing or helical toothing. The transmission by toothing may in particular to limit slippage between the elements. According to another embodiment, the engagement between the pulley, the pinions and the wheel can be achieved by friction. Advantageously, the friction drive may in particular allow to ensure a low operating noise of the water pump. In particular, the drive pulley, the pinions and / or the wheel may be made or covered with an elastomeric material.
Par élastomère, on comprendra un matériau polymère présentant des propriétés élastiques. By elastomer will be understood a polymeric material having elastic properties.
Plus particulièrement, la roue peut être réalisée d'une seule pièce avec l'axe. More particularly, the wheel can be made in one piece with the axis.
Avantageusement, la roue peut être taillée dans la masse avec l'axe, ce qui peut permettre de réduire le coût de fabrication de la pompe et d'assurer une plus grande solidité de l'ensemble axe-roue. Advantageously, the wheel can be cut in the mass with the axis, which can reduce the manufacturing cost of the pump and ensure greater strength of the wheel-axle assembly.
En particulier, la pompe peut comprendre un système apte à libérer les pignons de leurs axes respectifs B'B, C'C ou D'D et à solidariser au moins un des pignons libérés avec la poulie et/ ou la roue. In particular, the pump may comprise a system capable of releasing the pinions from their respective axes B'B, C'C or D'D and to secure at least one of the pinions released with the pulley and / or the wheel.
Avantageusement, la solidarisation d'un des pignons avec la poulie ou la roue permet d'obtenir que le sens de rotation de la poulie s'effectue dans la même direction que le sens de rotation de l'aube. Advantageously, the joining of one of the pinions with the pulley or the wheel makes it possible to obtain that the direction of rotation of the pulley takes place in the same direction as the direction of rotation of the blade.
Plus particulièrement, le système peut comprendre au moins un élément rigide apte à solidariser un des pignons libérés à la poulie et/ ou à la roue. More particularly, the system may comprise at least one rigid element adapted to secure one of the pinions released to the pulley and / or the wheel.
Selon un premier mode de réalisation, l'élément rigide peut être une goupille traversant des orifices traversant la roue et/ou la poulie d'une part et le pignon libéré d'autre part.  According to a first embodiment, the rigid element may be a pin through orifices passing through the wheel and / or the pulley on the one hand and the pinion released on the other hand.
Plus particulièrement, les orifices traversent axialement le pignon et la poulie et/ ou la roue. More particularly, the orifices pass axially through the pinion and the pulley and / or the wheel.
En particulier, l'élément rigide peut également être une vis traversant les deux orifices dont l'un au moins est fileté. Selon un deuxième mode de réalisation, l'élément rigide peut être une plaque conformée pour relier le pignon libéré et la roue, la plaque étant solidarisée par vissage, clipage ou soudage au pignon libéré et à la roue. In particular, the rigid element may also be a screw passing through the two orifices, at least one of which is threaded. According to a second embodiment, the rigid element may be a plate shaped to connect the released pinion and the wheel, the plate being secured by screwing, clipping or soldering to the released pinion and to the wheel.
Avantageusement, la pompe à eau selon l'invention sera utilisée pour assurer la circulation d'un fluide de refroidissement d'un moteur de véhicule. La pompe à eau peut alors être entraînée par la courroie de transmission du moteur. On dispose ainsi d'une pompe compacte et fiable qui peut être intégrée facilement dans l'environnement moteur du fait qu'il est possible de choisir le sens de rotation de son aube. L'invention est maintenant décrite en faisant référence aux dessins annexés, non limitatif, dans lesquels : Advantageously, the water pump according to the invention will be used to ensure the circulation of a cooling fluid of a vehicle engine. The water pump can then be driven by the engine drive belt. This provides a compact and reliable pump that can be easily integrated into the engine environment because it is possible to choose the direction of rotation of its blade. The invention is now described with reference to the appended drawings, in which:
La figure 1 est une représentation en coupe d'un mode de réalisation d'une pompe à eau selon l'invention, FIG. 1 is a sectional representation of an embodiment of a water pump according to the invention,
La figure 2 est une représentation schématique d'un mode de réalisation d'une pompe à eau selon l'invention. Figure 2 is a schematic representation of an embodiment of a water pump according to the invention.
Les figures 1 et 2 représentent une pompe à eau 1 comprenant un corps 10 traversé de part et d'autre par un axe 20. L'axe 20 est immobilisé radialement et axialement par un roulement à bille 21. On pourrait envisager une pluralité de roulements ou encore un roulement à double rangées de bille permettant de garantir la stabilité et le maintien de l'axe 20 dans le corps de pompe 10. FIGS. 1 and 2 show a water pump 1 comprising a body 10 traversed on either side by an axis 20. The axis 20 is immobilized radially and axially by a ball bearing 21. A plurality of bearings could be envisaged or a double row ball bearing to guarantee the stability and the maintenance of the shaft 20 in the pump body 10.
Par ailleurs, il est possible de prévoir des épaulements sur l'axe 20 permettant d'assurer le maintien du ou des roulement(s) 2 1 mais également du ou des roulement(s) 41. L'une des extrémités de l'axe 20 supporte une aube 30 adaptée à la circulation du fluide dans le circuit de refroidissement, l'autre extrémité supporte une poulie d 'entraînement 40 adaptée à l'entraînement par une courroie de transmission. Furthermore, it is possible to provide shoulders on the shaft 20 to ensure the maintenance of the bearing (s) 2 1 but also the bearing (s) 41. One of the ends of the axis 20 supports a blade 30 adapted to the flow of fluid in the cooling circuit, the other end supports a drive pulley 40 adapted to drive by a transmission belt.
L'aube 30 est rendue solidaire de l'axe 20 par exemple par un dispositif de clavette bien connu de l'homme du métier. On pourrait également envisager de solidariser l'aube 30 à l'axe 20 par un emmanchement serré, avantageusement associé à un jeu de rainures, ou par tout autre moyen connu permettant d'assurer une liaison entre un axe et un élément destiné à tourner avec l'axe. The blade 30 is secured to the axis 20 for example by a key device well known to those skilled in the art. One could also consider securing the blade 30 to the axis 20 by a tight fitting, advantageously associated with a set of grooves, or by any other known means for ensuring a connection between an axis and an element intended to rotate with the axis.
L'étanchéité eau/ air entre l'axe 20 et le corps 10, destinée à empêcher le liquide de refroidissement de pénétrer à l'intérieur de la pompe à eau et d'endommager le roulement 2 1 , est assurée par un élément d'étanchéité dynamique 60 tel qu'un joint à lèvre et plus particulièrement un joint torique garantissant une excellente étanchéité. La poulie d'entrainement 40 est immobilisée radialement et axialement sur l'axe 20 par un roulement 41. Afin de protéger le roulement 41 des poussières, on fixe un cache 70 sur l'extrémité extérieure de la poulie 40. The water / air tightness between the shaft 20 and the body 10, intended to prevent the coolant from entering the water pump and damaging the bearing 2 1, is provided by an element of dynamic sealing 60 such as a lip seal and more particularly an O-ring guaranteeing excellent sealing. The drive pulley 40 is immobilized radially and axially on the axis 20 by a bearing 41. In order to protect the bearing 41 from the dust, a cover 70 is fixed on the outer end of the pulley 40.
La circonférence extérieure de la poulie 40 comprend un ensemble de stries45 adaptées pour faciliter un entrainement par une courroie (non représentée). On pourrait envisager que la circonférence extérieure de la poulie 40 ne comprenne pas de stries, ce qui risquerait toutefois d'augmenter le glissement de la courroie sur la poulie et de provoquer une usure prématurée de la courroie. La circonférence intérieure de la poulie 40, appelée aussi grande couronne, entraine un ensemble de trois pignons 52, 52' et 52" (non représenté sur les figures pour des raisons de clarté) appelés aussi satellites, qui entraînent à leur tour une roue 22, appelée aussi pignon planétaire central, solidaire de l'axe 20. Cet ensemble forme ainsi un train épicycloïdal 50 bien connu de l'homme du métier. The outer circumference of the pulley 40 includes a set of ridges 45 adapted to facilitate belt drive (not shown). It could be envisaged that the outer circumference of the pulley 40 does not include ridges, which would however increase the slippage of the belt on the pulley and cause premature wear of the belt. The inner circumference of the pulley 40, also called large crown, causes a set of three pinions 52, 52 'and 52 "(not shown in the figures for the sake of clarity) also called satellites, which in turn drive a wheel 22 , Also called central sun gear, integral with the axis 20. This assembly thus forms an epicyclic gear 50 well known to those skilled in the art.
L'entrainement entre la poulie 40, les pignons 52 et la roue 22 s'effectue, selon l'exemple représenté, par friction. Afin de limiter les glissements, les surfaces en contact de la poulie 40, des pignons 52 et de la roue 22 peuvent être en tout ou partie composées ou recouvertes d'un matériau élastomère. The drive between the pulley 40, the pinions 52 and the wheel 22 takes place, according to the example shown, by friction. In order to limit slippage, the surfaces in contact with the pulley 40, the pinions 52 and the wheel 22 may be wholly or partly composed or covered with an elastomeric material.
L'entrainement entre la poulie 40, les pignons 52 et la roue pourrait également être réalisé par une denture, droite ou hélicoïdale. Chaque pignon 52, 52' et 52" est libre en rotation autour d'un axe, respectivement, B'B, C'C et D'D (non représenté pour des raisons de clarté). Ces axes B'B, C'C et D'D sont espacés angulairement de 120°. Dans l'exemple représenté à la figure 1 , le pignon 52 est maintenu en translation et libre en rotation sur le corps de pompe 10 par l'intermédiaire d'une vis épaulée 12 permettant d'assurer le jeu axial de fonctionnement nécessaire à la rotation autour de l'axe B'B du pignon 52. Le même type de montage est également applicable aux autres pignons 52' et 52". The drive between the pulley 40, the pinions 52 and the wheel could also be achieved by a set of teeth, straight or helical. Each pinion 52, 52 'and 52 "is free to rotate about an axis, respectively, B'B, C'C and D'D (not shown for the sake of clarity) .These axes B'B, C' C and D'D are angularly spaced apart by 120 ° In the example shown in FIG. 1, the pinion 52 is held in translation and free to rotate on the pump body 10 by means of a shoulder screw 12 enabling to provide the axial play of operation necessary for rotation about the axis B'B of the pinion 52. The same type of assembly is also applicable to the other pinions 52 'and 52 ".
Entre le corps 10 et chaque pignon 52 se trouve un élément 1 1 faisant office d'une part de cale pour le réglage du jeu et d'autre part d'élément d'étanchéité, empêchant la poussière de pénétrer dans les pignons 52. Between the body 10 and each pinion 52 is an element 1 1 acting as a wedge share for adjusting the clearance and on the other hand sealing element, preventing dust from entering the pinions 52.
La roue 22 est, de préférence, taillée dans la masse avec l'axe 20, ce qui permet d'obtenir un coût de fabrication peu élevé tout en assurant une excellente solidité de l'ensemble axe 20 et roue 22. The wheel 22 is preferably cut in the mass with the axis 20, which provides a low manufacturing cost while ensuring excellent strength of the entire shaft 20 and wheel 22.
On pourrait également envisager de fabriquer séparément l'axe 20 et la roue 22 et de les solidariser entre eux, selon les mêmes méthodes que celles proposées précédemment pour solidariser l'axe 20 avec l'aube 30. It would also be possible to manufacture separately the shaft 20 and the wheel 22 and to join them together, according to the same methods as those previously proposed for securing the axis 20 with the blade 30.
En faisant varier le diamètre intérieur de la poulie 40 et les diamètres extérieurs des pignons 52 et de la roue 22, il est possible d'obtenir différents rapports de transmission en fonction de l'utilisation souhaitée. On pourrait par exemple envisager un rapport permettant à la roue 22, et donc à l'axe 20 et par extension à l'aube 30, de tourner deux fois plus rapidement que la poulie 40, assurant ainsi une circulation du fluide dans le circuit de refroidissement plus importante et donc d'améliorer le refroidissement du moteur en terme de fiabilité. Nous allons maintenant décrire le mode de fonctionnement de la pompe 1 selon l'invention. By varying the inside diameter of the pulley 40 and the outside diameters of the pinions 52 and the wheel 22, it is possible to obtain different transmission ratios depending on the desired use. One could for example consider a ratio allowing the wheel 22, and therefore the axis 20 and by extension to the blade 30, to rotate twice as fast as the pulley 40, thus ensuring a circulation of the fluid in the circuit. greater cooling and thus improve engine cooling in terms of reliability. We will now describe the mode of operation of the pump 1 according to the invention.
Si la poulie 40 est entraînée dans le sens horaire par une courroie, par exemple la courroie de transmission d'un moteur de véhicule, les pignons 52 tournent également dans le sens horaire et entraînent la roue 22, et par extension l'aube 30, dans le sens antihoraire. On obtient alors une pompe à eau dont le sens de rotation de l'aube 30 est inversé par rapport au sens de rotation de la poulie 40. If the pulley 40 is driven clockwise by a belt, for example the drive belt of a vehicle engine, the pinions 52 also turn clockwise and drive the wheel 22, and by extension the blade 30, counterclockwise. This produces a water pump whose direction of rotation of the blade 30 is reversed relative to the direction of rotation of the pulley 40.
Si l'on souhaite que l'aube 30 et la poulie 40 tournent dans le même sens, il suffit alors de libérer les pignons 52, 52' et/ou 52" et de rendre au moins un pignon solidaire de la poulie 40 et/ ou de la roue 22. If it is desired that the blade 30 and the pulley 40 rotate in the same direction, then simply release the pinions 52, 52 'and / or 52 "and make at least one pinion integral with the pulley 40 and / or the wheel 22.
La pompe 1 comprend avantageusement tout type de système apte à libérer les pignons 52, 52' ou 52" de leurs axes respectifs B'B, C'C ou D'D et à solidariser au moins un des pignons libérés 52, 52', 52" avec la poulie 40 et/ ou la roue 22. The pump 1 advantageously comprises any type of system capable of releasing the pinions 52, 52 'or 52 "of their respective axes B'B, C'C or D'D and to secure at least one of the released gears 52, 52', 52 "with pulley 40 and / or wheel 22.
A titre d'exemple, il est possible de libérer les pignons 52, 52' et/ou 52" en ôtant la vis épaulée 12. Il suffit ensuite, ou au préalable, de solidariser au moins un des pignons libérés 52, 52' et/ou 52" avec la poulie 40 par l'intermédiaire d'une goupille traversant des orifices (non représentés) correspondant sur l'un des pignons 52, 52' et/ ou 52" et la poulie 40. On obtient alors une pompe à eau dont le sens de rotation de l'aube est identique au sens de rotation de la poulie. By way of example, it is possible to release the pinions 52, 52 'and / or 52 "by removing the shoulder screw 12. It is then sufficient, or first, to secure at least one of the released gears 52, 52' and or 52 "with the pulley 40 by means of a pin through orifices (not shown) corresponding to one of the pinions 52, 52 'and / or 52" and the pulley 40. A pump with water whose direction of rotation of the blade is identical to the direction of rotation of the pulley.
Il est également possible de solidariser par tous types de moyens au moins un des pignons libérés 52, 52 ' ou 52 " avec la roue 22. Cette solidarisation peut par exemple être réalisée par l'intermédiaire d'un élément rigide du type plaque vissée à l'un des pignons libérés et à la roue 22. Une autre méthode pour faire tourner la poulie 40 et la roue 22 dans le même sens pourrait consister dans le démontage de l'ensemble des pignons 52, 52' et 52" et le remplacement de la poulie 40 par une poulie dont la circonférence intérieure serait inférieure à la circonférence intérieure initiale et qui serait apte à entraîner directement la roue 22, tout en gardant un rapport d'entraînement déterminé. It is also possible to secure by all types of means at least one of the released gears 52, 52 'or 52 "with the wheel 22. This fastening can for example be achieved by means of a rigid member of the plate type screwed to one of the pinions released and the wheel 22. Another method for rotating the pulley 40 and the wheel 22 in the same direction could consist in the disassembly of all the gears 52, 52 'and 52 "and the replacement pulley 40 by a pulley whose inner circumference is less than the initial inner circumference and which would be able to directly drive the wheel 22, while keeping a determined drive ratio.
On pourrait également envisager de remplacer la roue 22 par une roue d'un diamètre plus important apte à être entraînée directement par la poulie 40. On pourrait également envisager tout moyen de solidarisation entre la poulie d 'entraînement 40 et l'axe 22. One could also consider replacing the wheel 22 by a wheel of larger diameter adapted to be driven directly by the pulley 40. One could also consider any means of connection between the drive pulley 40 and the axis 22.
Une pompe à eau telle que décrite précédemment peut donc permettre d'avoir un produit mécanique fiable pour un coût peu élevé qui peut permettre de choisir le sens de rotation de l'aube, indépendamment du sens de rotation de la poulie, par exemple lors de la fabrication de la pompe à eau ou lors de la mise en place de la pompe à eau dans le véhicule.  A water pump as described above can therefore provide a reliable mechanical product for a low cost that can allow to choose the direction of rotation of the blade, regardless of the direction of rotation of the pulley, for example when the manufacture of the water pump or when setting up the water pump in the vehicle.

Claims

REVENDICATIONS
1. Pompe à eau ( 1 ) comprenant un corps de pompe ( 10) apte à maintenir en position au moins un axe (20) sur lequel est solidarisé une aub e ( 30 ), l'aube (30) étant entraînée par une poulie d 'entraînement (40), caractérisée en ce que la pompe à eau (1) comprend un dispositif (50) apte à inverser le sens de rotation entre l'aube (30) et la poulie (40). 1. Water pump (1) comprising a pump body (10) adapted to maintain in position at least one axis (20) on which is secured an aub e (30), the blade (30) being driven by a pulley drive (40), characterized in that the water pump (1) comprises a device (50) adapted to reverse the direction of rotation between the blade (30) and the pulley (40).
2. Pompe à eau selon la revendication 1 , caractérisée en ce que le dispositif (50) comprend au moins trois pignons (52, 52', 52") montés libres en rotation respectivement sur des axes B'B, C'C et D'D, les axes B'B, C'C et D'D appartenant au corps de pompe ( 1), les pignons (52,2. Water pump according to claim 1, characterized in that the device (50) comprises at least three pinions (52, 52 ', 52 ") rotatably mounted respectively on axes B'B, C'C and D 'D, the axes B'B, C'C and D'belonging to the pump body (1), the pinions (52,
52', 52") étant en prise d'une part avec la poulie (40) et d'autre part avec une roue (22), la poulie (40) étant montée libre en rotation sur l'axe A'A, la roue (22) étant solidarisée sur l'axe A'A. 52 ', 52 ") being engaged on the one hand with the pulley (40) and on the other hand with a wheel (22), the pulley (40) being rotatably mounted on the axis A'A, the wheel (22) being secured to the axis A'A.
3. Pompe à eau (1) selon la revendication 2, caractérisée en ce que chaque pignon (52, 52' et 52 ") est monté libre en rotation sur un axe B'B, C'C, D 'D du corps de pompe (1) par l'intermédiaire d'une vis épaulée (12). 3. Water pump (1) according to claim 2, characterized in that each pinion (52, 52 'and 52 ") is rotatably mounted on an axis B'B, C'C, D' D of the body of pump (1) via a stepped screw (12).
4. Pompe à eau (1) selon l'une quelconque des revendications 2 ou4. Water pump (1) according to any one of claims 2 or
3, caractérisée en ce que la mise en prise entre la poulie (40), les pignons (52, 52', 52") et la roue (22) est réalisée par une denture. 3, characterized in that the engagement between the pulley (40), the pinions (52, 52 ', 52 ") and the wheel (22) is formed by a toothing.
5. Pompe à eau (1) selon l'une quelconque des revendications 2 ou 3, caractérisée en ce que la mise en prise entre la poulie (40) , les pignons (52, 52' et 52") et la roue (22) est réalisée par friction. 5. Water pump (1) according to any one of claims 2 or 3, characterized in that the engagement between the pulley (40), the pinions (52, 52 'and 52 ") and the wheel (22). ) is made by friction.
6. Pompe à eau selon la revendication 5, caractérisée en ce que la poulie d 'entraînement (40), les pignons (52, 52', 52") et/ou la roue (22) sont réalisés ou recouverts d'un matériau élastomère. Water pump according to Claim 5, characterized in that the drive pulley (40), the pinions (52, 52 ', 52 ") and / or the wheel (22) are made or covered with a material elastomer.
7. Pompe à eau selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la roue (22) est réalisée d'une seule pièce avec l'axe (20). 7. Water pump according to any one of claims 1 to 6, characterized in that the wheel (22) is formed integrally with the axis (20).
8. Pompe à eau (1) selon l'une quelconque des revendications 2 à 7, caractérisée en ce que la pompe (1) comprend un système apte à libérer les pignons (52, 52' ou 52") de leurs axes B'B, C'C ou D'D et à solidariser au moins un des pignons libérés (52, 52', 52") avec la poulie (40) et/ ou la roue (22). 8. Water pump (1) according to any one of claims 2 to 7, characterized in that the pump (1) comprises a system adapted to release the pinions (52, 52 'or 52 ") of their axes B' B, C'C or D and to secure at least one of the released gears (52, 52 ', 52 ") with the pulley (40) and / or the wheel (22).
9. Pompe à eau (1) selon la revendication 8, caractérisée en ce que le système comprend au moins un élément rigide apte à solidariser un des pignons libérés (52, 52', 52") à la poulie (40) et/ou à la roue (22). 9. Water pump (1) according to claim 8, characterized in that the system comprises at least one rigid element adapted to secure one of the released gears (52, 52 ', 52 ") to the pulley (40) and / or to the wheel (22).
PCT/FR2011/051630 2010-07-08 2011-07-08 Reversible-drive water pump WO2012004544A1 (en)

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FR1055567 2010-07-08
FR1055567A FR2962499B1 (en) 2010-07-08 2010-07-08 WATER PUMP WITH REVERSIBLE DRIVE

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10288072B2 (en) 2014-06-09 2019-05-14 Magna Powertrain Fpc Limited Partnership Sensorless low flow electric water pump and method of regulating flow therewith

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Publication number Priority date Publication date Assignee Title
GB384225A (en) * 1931-07-11 1932-12-01 Aeg Improvements in or relating to reversible internal combustion engines provided with blowers
DE583495C (en) * 1933-09-04 Motorenfabrik Darmstadt Akt Ge Reverse gear for rotary piston compressor
US2830471A (en) * 1955-02-24 1958-04-15 Int Harvester Co Reversing planetary drive for engine fan
FR2845729A1 (en) * 2002-10-14 2004-04-16 Renault Sa Layout of water pump in automobile engine comprising casing on which pump is fixed, pump comprising shaft extending axially into pump body housing with dynamic sealing joint between pump wheel and leak evacuation orifice
WO2010025959A2 (en) * 2008-09-08 2010-03-11 Askoll P&C S.R.L. Unidirectional synchronous electric pump, particularly for electric household appliances

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE583495C (en) * 1933-09-04 Motorenfabrik Darmstadt Akt Ge Reverse gear for rotary piston compressor
GB384225A (en) * 1931-07-11 1932-12-01 Aeg Improvements in or relating to reversible internal combustion engines provided with blowers
US2830471A (en) * 1955-02-24 1958-04-15 Int Harvester Co Reversing planetary drive for engine fan
FR2845729A1 (en) * 2002-10-14 2004-04-16 Renault Sa Layout of water pump in automobile engine comprising casing on which pump is fixed, pump comprising shaft extending axially into pump body housing with dynamic sealing joint between pump wheel and leak evacuation orifice
WO2010025959A2 (en) * 2008-09-08 2010-03-11 Askoll P&C S.R.L. Unidirectional synchronous electric pump, particularly for electric household appliances

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10288072B2 (en) 2014-06-09 2019-05-14 Magna Powertrain Fpc Limited Partnership Sensorless low flow electric water pump and method of regulating flow therewith

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FR2962499A1 (en) 2012-01-13

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