EP1830045A1 - Regulated water pump - Google Patents

Regulated water pump Download PDF

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Publication number
EP1830045A1
EP1830045A1 EP07103413A EP07103413A EP1830045A1 EP 1830045 A1 EP1830045 A1 EP 1830045A1 EP 07103413 A EP07103413 A EP 07103413A EP 07103413 A EP07103413 A EP 07103413A EP 1830045 A1 EP1830045 A1 EP 1830045A1
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EP
European Patent Office
Prior art keywords
cage
shaft
integral
bearing
drive shaft
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Granted
Application number
EP07103413A
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German (de)
French (fr)
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EP1830045B1 (en
Inventor
Pierre Reininger
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Pierburg Pump Technology France SARL
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Pierburg SARL
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    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • 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
    • 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
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed

Definitions

  • the invention relates to a water pump according to the preamble of claim 1.
  • Paddle pumps especially in the automotive industry, are used to circulate water in the vehicle cooling system. They are set in motion by a belt connected to the engine.
  • the pulley rotated by the belt was directly fitted on the drive shaft and the ball bearing was inside the pump body.
  • the pulley can also be mounted on a ball bearing placed on a bearing housing of the pump.
  • the belt is connected to the motor so that as it rotates, the belt drives the pump in rotation, whether or not it is necessary to circulate the coolant. This results in a significant loss of energy and increased wear of the pump parts.
  • the pump rotates according to the speed of the motor.
  • the most common is to provide the pump with a coupler associated with a control element by temperature.
  • An expandable element directly or indirectly causes coupling of the coupler when it reaches a certain expansion. This expandable element is under the influence of the temperature of the water circulating in the pump.
  • the coupler may be placed between the drive shaft and the impeller or between the drive means and the drive shaft.
  • the documents DE 43 25 627 A1 and DE 28 34 199 A1 for example, have pumps having a coupler placed between the drive shaft and the impeller.
  • the coupling means are constituted by a disk in a working chamber containing a viscous liquid. This viscous liquid flows between a reservoir and the working chamber through an opening controlled by a valve and then returns through a return hole in the reservoir.
  • the valve is actuated by means of an expandable element. The warmer the water on the front side of the impeller, the more the expansion element expands, causing the valve to open, the viscous liquid to enter the working chamber and the coupling between the disc drive and the impeller.
  • This solution is particularly bulky.
  • the coupling device, parallel to the impeller, requires increasing the height of the pump.
  • an expandable member consisting of an annular cylinder containing an expandable product and having two cylindrical walls forming friction surfaces for frictional engagement with the friction surfaces on the wheel hub and the shaft.
  • drive There is no viscous liquid between the different friction surfaces, only a layer of water from the pump.
  • this expandable element requires two pairs of friction surfaces arranged parallel to the axis of the drive shaft. Due to the friction between the expandable member and the corresponding surfaces of the drive shaft and the impeller, this expandable member is subject to rapid wear.
  • the expandable element is located at the bottom of a dead space located between the hub of the wheel and the drive shaft and closed at one of its ends by the retaining ring of the impeller. The prevailing water, whose temperature must cause the dilatation of the expandable element, can not easily circulate. Its temperature is therefore not significant from that flowing in the cooling circuit.
  • the viscocoupler is placed between the drive means and the drive shaft.
  • This device comprises a multi-plate clutch actuated with a viscous liquid.
  • This viscous liquid is included in a compression chamber consisting on the one hand of a fixed wall and on the other hand by a movable wall.
  • An expandable element, placed in the pump near the impeller, causes during its expansion the displacement of a rod passing through the drive shaft and fixed by its other end to the movable wall of the chamber of compression.
  • the expandable element in the pipe is an obstacle to the flow of water.
  • this element is relatively bulky, as is the entire clutch.
  • the displacement of the rod in the housing made in the drive shaft is accompanied friction and therefore wear.
  • the objective of the present invention is to develop a water pump according to the preamble whose coupling device is less bulky and less subject to wear than those of known devices.
  • the compression means comprise a deformable chamber containing a heat-expandable liquid whose deformable wall separates it from the compression chamber. This avoids any solid friction between the compression means and the drive shaft.
  • one of the walls of the compression chamber is integral with the drive means and another is integral with the drive shaft.
  • the compression means compress the viscous liquid which then ensures the hydraulic coupling between the integral wall of the drive means and the integral wall of the drive shaft.
  • the deformable chamber may be integral with the drive shaft or, preferably, drive means.
  • the drive shaft may be hollow and closed at its end carrying the impeller, for example by a sealing plug. It is then possible to place the viscocoupler inside this tree.
  • the coupling device may comprise a primary shaft penetrating into the drive shaft and secured to the drive means, for example by means of a housing, a deformable tube being arranged around the primary shaft inside the drive shaft without touching it, a heat-expandable liquid being contained in the chamber formed by the space between the primary shaft and the deformable tube, a liquid viscous being placed in the compression chamber located between the deformable tube and the inner wall of the drive shaft.
  • This solution is particularly compact and fits into the drive shaft present anyway in the pump.
  • the transmission shaft is integral with the cage of a first bearing, preferably the outer cage, the other cage of the first bearing, preferably the inner cage, being integral with the pump body.
  • the bearing outside the pump on a bearing provided for this purpose.
  • the drive means comprise a contact surface secured to the cage of a second bearing, preferably the outer cage, the other cage of the second bearing, preferably the inner cage being preferably integral with the cage of the first bearing integral with the drive shaft, the coupling device being interposed between the cage of the second bearing integral with the drive means and the transmission shaft.
  • the pump (1) is composed of a housing (2) in which there is a impeller (3) mounted on a drive shaft (4). Driving means are provided for driving the shaft (4) in rotation.
  • the housing (1) is provided with a bearing (5) on which is fitted the inner cage (6 ') of a first ball bearing (6).
  • the drive shaft (4) is integral with the outer race (6 ") of the same first bearing (6), for which the drive shaft is extended by a radial housing (7) which ends with a ring (8) extending axially.
  • This ring (8) is fitted on the outer casing (6 ') of the first bearing (6) It is obvious that it would also be possible to directly fasten the radial casing (7). ) with the outer cage (6 ") of the first bearing (6).
  • a second bearing (9) is fitted on the crown (8).
  • the inner race (9 ') of this second bearing (9) is thus integral with the drive shaft (4), while the outer race (9 ") serves as a pulley for a drive belt (not shown). It is also possible to place a pulley on the outer cage (9 ") of this second bearing (9).
  • a dynamic seal (10) is placed between the housing (2) and the drive shaft (4) to seal the pump (1) at the driver.
  • the pump can not work.
  • the friction experienced by the impeller in the pump is too great for the rotation of the outer cage (9 ") of the second bearing (9) can significantly cause the inner cage (9 ') and therefore the shaft d training (4).
  • a coupling device is therefore arranged between the drive shaft (4) and the outer race (9 ") of the second bearing (9) to couple or disconnect these two elements as a function of the temperature of the water prevailing in the circuit connected to the pump (1).
  • This coupling device is controlled as a function of the temperature of the water in the pump, particularly at the level of the impeller. A viscous liquid made active when the temperature increases ensures the hydraulic coupling between the drive means (9 ") and the drive shaft (4).
  • the drive shaft (4) is hollow and supports the coupling device.
  • the latter is essentially composed of a primary rotating shaft (20) secured to the drive means (9 ") via a housing (21), this primary shaft is partially surrounded by a deformable tube (22). containing a liquid that can expand under the effect of heat.
  • the drive shaft (4) is closed by a sealing plug (23).
  • the hollow drive shaft (4) is closed by a seal (24) placed between the end of the deformable tube (22) and the inner wall of the hollow shaft (4).
  • a closed chamber (25) between the deformable tube (22) and the inner wall of the drive shaft (4).
  • This chamber (25) is filled with a viscous liquid. The amount of viscous liquid is chosen such that when the deformable tube (22) is not deformed (low temperature), the viscous liquid pressure prevailing in the chamber (25) is insufficient to ensure a coupling between the shaft primary (20) and drive shaft (4).
  • the thermal coupling between the water located at the impeller and the expandable liquid can be done via the hollow shaft (4) or the sealing plug (23), the viscous liquid and the tube deformable (22).
  • the transition from the uncoupled state to the coupled state can be done more or less gradually.
  • the pump it will be possible to design the pump so that it turns all the faster as the temperature of the cooling water is high, while it will run slower if the temperature is lower and will be at a lower temperature. stop when the water temperature is below a certain threshold.
  • the first bearing for rotating the drive shaft may be inside the housing.
  • the second bearing need not necessarily be located around the first one.
  • the drive belt can cooperate either directly with the outer cage (9 ") or with a pulley secured to the outer race (9") of the second bearing.
  • the regulation can be done instantaneously when a certain threshold value is reached, or on the contrary progressively according to the needs.

Abstract

The pump (1) has a case (2) with a radial flow impeller (3) which is mounted on a drive shaft (4). An outer cage (9``) serving as a pulley drives the shaft in rotation. A coupling device having a compression chamber (25) is arranged between the cage and the shaft according to temperature in a water circuit connected to the pump. A compression unit controls volume of the chamber according to water in the circuit. The unit has a deformable chamber containing a ductile liquid under effect of heat, and a deformable wall (22) separates the heat from the chamber (25).

Description

L'invention concerne une pompe à eau selon le préambule de la revendication 1.The invention relates to a water pump according to the preamble of claim 1.

On utilise des pompes à aubes notamment dans l'industrie automobile pour faire circuler l'eau du circuit de refroidissement des véhicules. Elles sont mises en mouvement par une courroie reliée au moteur.Paddle pumps, especially in the automotive industry, are used to circulate water in the vehicle cooling system. They are set in motion by a belt connected to the engine.

Initialement, la poulie entraînée en rotation par la courroie était directement emmanchée sur l'arbre de transmission et le roulement à billes se trouvait à l'intérieur du corps de pompe. La poulie peut également être montée sur un roulement à billes placé sur un palier du boîtier de la pompe. La courroie est raccordée au moteur de sorte que tant que celui-ci tourne, la courroie entraîne la pompe en rotation, qu'il soit ou non nécessaire de faire circuler le liquide de refroidissement. Il s'en suit une perte importante d'énergie et une usure accrue des pièces de la pompe. De plus, la pompe tourne en fonction de la vitesse du moteur.Initially, the pulley rotated by the belt was directly fitted on the drive shaft and the ball bearing was inside the pump body. The pulley can also be mounted on a ball bearing placed on a bearing housing of the pump. The belt is connected to the motor so that as it rotates, the belt drives the pump in rotation, whether or not it is necessary to circulate the coolant. This results in a significant loss of energy and increased wear of the pump parts. In addition, the pump rotates according to the speed of the motor.

Il a donc été proposé de commander la rotation de la roue à aubes en fonction de la température de l'eau à refroidir, autrement dit, de faire tourner la roue à aubes lorsque l'eau est chaude et de ne plus l'entraîner dès que la température est repassée en dessous d'une valeur seuil. Ainsi, la pompe ne tourne que lorsque cela est nécessaire.It has therefore been proposed to control the rotation of the impeller according to the temperature of the water to be cooled, that is to say, to turn the impeller when the water is hot and not to drive it any more. that the temperature is ironed below a threshold value. Thus, the pump turns only when necessary.

Plusieurs solutions sont possibles. La plus courante consiste à munir la pompe d'un coupleur associé à un élément de commande par température. Un élément dilatable provoque directement ou indirectement le couplage du coupleur lorsqu'il atteint une certaine dilatation. Cet élément dilatable est sous l'influence de la température de l'eau circulant dans la pompe.Several solutions are possible. The most common is to provide the pump with a coupler associated with a control element by temperature. An expandable element directly or indirectly causes coupling of the coupler when it reaches a certain expansion. This expandable element is under the influence of the temperature of the water circulating in the pump.

Le coupleur peut être placé soit entre l'arbre d'entraînement et la roue à aubes soit entre les moyens d'entraînement et l'arbre d'entraînement.The coupler may be placed between the drive shaft and the impeller or between the drive means and the drive shaft.

Les documents DE 43 25 627 A1 et DE 28 34 199 A1 par exemple, présentent des pompes ayant un coupleur placé entre l'arbre d'entraînement et la roue à aubes. Dans le document DE 43 25 627 A1 , les moyens de couplage sont constitués par un disque d'entraînement placé dans une chambre de travail contenant un liquide visqueux. Ce liquide visqueux circule entre un réservoir et la chambre de travail en passant à travers une ouverture commandée par une valve puis retourne par un trou de retour dans le réservoir. La valve est actionnée à l'aide d'un élément dilatable. Plus l'eau sur la face avant de la roue à aubes est chaude, plus l'élément dilatable se dilate, provoquant l'ouverture de la valve, l'entrée du liquide visqueux dans la chambre de travail et le couplage entre le disque d'entraînement et la roue à aubes. Cette solution est particulièrement encombrante. Le dispositif de couplage, parallèle à la roue à aube, nécessite d'augmenter la hauteur de la pompe.The documents DE 43 25 627 A1 and DE 28 34 199 A1 for example, have pumps having a coupler placed between the drive shaft and the impeller. In the document DE 43 25 627 A1 , the coupling means are constituted by a disk in a working chamber containing a viscous liquid. This viscous liquid flows between a reservoir and the working chamber through an opening controlled by a valve and then returns through a return hole in the reservoir. The valve is actuated by means of an expandable element. The warmer the water on the front side of the impeller, the more the expansion element expands, causing the valve to open, the viscous liquid to enter the working chamber and the coupling between the disc drive and the impeller. This solution is particularly bulky. The coupling device, parallel to the impeller, requires increasing the height of the pump.

Dans le document DE 28 34 199 A1 , on a placé un élément dilatable constitué par un cylindre annulaire contenant un produit dilatable et dont les deux parois cylindriques forment des surfaces de friction destinées à assurer un contact par friction avec les surfaces de friction situées sur le moyeu de la roue et l'arbre d'entraînement. Il n'y a pas de liquide visqueux entre les différentes surfaces de frictions, seulement une couche d'eau de la pompe. Pour fonctionner, cet élément dilatable nécessite deux paires de surfaces de friction disposées parallèlement à l'axe de l'arbre d'entraînement. En raison des frottements entre l'élément dilatable et les surfaces correspondantes de l'arbre d'entraînement et de la roue à aubes, cet élément dilatable est soumis à une usure rapide. En outre, l'élément dilatable se trouve au fond d'un espace mort situé entre le moyeu de la roue et l'arbre d'entraînement et fermé à l'une de ses extrémités par la bague de retenue de la roue à aubes. L'eau qui y règne, dont la température doit provoquer la dilatation de l'élément dilatable, ne peut pas facilement circuler. Sa température n'est donc pas significative de celle circulant dans le circuit de refroidissement.In the document DE 28 34 199 A1 , an expandable member consisting of an annular cylinder containing an expandable product and having two cylindrical walls forming friction surfaces for frictional engagement with the friction surfaces on the wheel hub and the shaft is provided. drive. There is no viscous liquid between the different friction surfaces, only a layer of water from the pump. To function, this expandable element requires two pairs of friction surfaces arranged parallel to the axis of the drive shaft. Due to the friction between the expandable member and the corresponding surfaces of the drive shaft and the impeller, this expandable member is subject to rapid wear. In addition, the expandable element is located at the bottom of a dead space located between the hub of the wheel and the drive shaft and closed at one of its ends by the retaining ring of the impeller. The prevailing water, whose temperature must cause the dilatation of the expandable element, can not easily circulate. Its temperature is therefore not significant from that flowing in the cooling circuit.

Dans le document JP 2001 090537 A , le viscocoupleur est placé entre les moyens d'entraînement et l'arbre d'entraînement. Ce dispositif comporte un embrayage multidisque actionné avec un liquide visqueux. Ce liquide visqueux est compris dans une chambre de compression constituée d'une part par une paroi fixe et d'autre part par une paroi mobile. Un élément dilatable, placé dans la pompe à proximité de la roue à aubes, provoque lors de sa dilatation le déplacement d'une tige passant à travers l'arbre d'entraînement et fixée par son autre extrémité à la paroi mobile de la chambre de compression. L'élément dilatable, situé dans la conduite constitue un obstacle pour la circulation de l'eau. De plus, cet élément est relativement encombrant, de même que l'ensemble de l'embrayage. En outre, le déplacement de la tige dans le logement pratiqué dans l'arbre d'entraînement s'accompagne de frottements et donc d'usure.In the document JP 2001 090537 A the viscocoupler is placed between the drive means and the drive shaft. This device comprises a multi-plate clutch actuated with a viscous liquid. This viscous liquid is included in a compression chamber consisting on the one hand of a fixed wall and on the other hand by a movable wall. An expandable element, placed in the pump near the impeller, causes during its expansion the displacement of a rod passing through the drive shaft and fixed by its other end to the movable wall of the chamber of compression. The expandable element in the pipe is an obstacle to the flow of water. In addition, this element is relatively bulky, as is the entire clutch. In addition, the displacement of the rod in the housing made in the drive shaft is accompanied friction and therefore wear.

L'objectif de la présente invention est de développer une pompe à eau selon le préambule dont le dispositif de couplage soit moins encombrant et moins soumis à l'usure que ceux des dispositifs connus.The objective of the present invention is to develop a water pump according to the preamble whose coupling device is less bulky and less subject to wear than those of known devices.

Cet objectif est atteint conformément à l'invention du fait que les moyens de compression comprennent une chambre déformable contenant un liquide dilatable sous l'effet de la chaleur et dont la paroi déformable la sépare de la chambre de compression. On évite ainsi tout frottement solide entre les moyens de compression et l'arbre d'entraînement.This object is achieved according to the invention because the compression means comprise a deformable chamber containing a heat-expandable liquid whose deformable wall separates it from the compression chamber. This avoids any solid friction between the compression means and the drive shaft.

Pour éviter les pièces intermédiaire, il est préférable qu'une des parois de la chambre de compression soit solidaire des moyens d'entraînement et une autre soit solidaire de l'arbre d'entraînement. Ainsi, en fonction des besoins, les moyens de compression compriment le liquide visqueux qui alors assure l'accouplement hydraulique entre la paroi solidaire des moyens d'entraînement et la paroi solidaire de l'arbre d'entraînement.To avoid the intermediate parts, it is preferable that one of the walls of the compression chamber is integral with the drive means and another is integral with the drive shaft. Thus, depending on the needs, the compression means compress the viscous liquid which then ensures the hydraulic coupling between the integral wall of the drive means and the integral wall of the drive shaft.

Selon le mode de conception souhaité, la chambre déformable peut être solidaire de l'arbre d'entraînement ou, de préférence, des moyens d'entraînement.Depending on the desired design mode, the deformable chamber may be integral with the drive shaft or, preferably, drive means.

Dans la pratique, l'arbre d'entraînement peut être creux et fermé à son extrémité portant la roue à aubes, par exemple par un bouchon d'étanchéité. Il est alors possible de placer le viscocoupleur à l'intérieur de cet arbre. Dans ce cas, le dispositif de couplage peut comprendre un arbre primaire pénétrant dans l'arbre d'entraînement et solidaire des moyens d'entraînement, par exemple par le biais d'un boîtier, un tube déformable étant disposé autour de l'arbre primaire à l'intérieur de l'arbre d'entraînement sans pour autant le toucher, un liquide dilatable sous l'effet de la chaleur étant contenu dans la chambre formée par l'espace compris entre l'arbre primaire et le tube déformable, un liquide visqueux étant placé dans la chambre de compression située entre le tube déformable et la paroi interne de l'arbre d'entraînement. Cette solution est particulièrement compacte et s'intègre dans l'arbre d'entraînement présent de toute façon dans la pompe.In practice, the drive shaft may be hollow and closed at its end carrying the impeller, for example by a sealing plug. It is then possible to place the viscocoupler inside this tree. In this case, the coupling device may comprise a primary shaft penetrating into the drive shaft and secured to the drive means, for example by means of a housing, a deformable tube being arranged around the primary shaft inside the drive shaft without touching it, a heat-expandable liquid being contained in the chamber formed by the space between the primary shaft and the deformable tube, a liquid viscous being placed in the compression chamber located between the deformable tube and the inner wall of the drive shaft. This solution is particularly compact and fits into the drive shaft present anyway in the pump.

Il est préférable que l'arbre de transmission soit solidaire de la cage d'un premier roulement, de préférence la cage extérieure, l'autre cage de ce premier roulement, de préférence la cage intérieure, étant solidaire du corps de pompe. On placera de préférence le roulement à l'extérieur de la pompe, sur un palier prévu à cet effet.It is preferable that the transmission shaft is integral with the cage of a first bearing, preferably the outer cage, the other cage of the first bearing, preferably the inner cage, being integral with the pump body. We will preferably place the bearing outside the pump, on a bearing provided for this purpose.

De même, il est préférable que les moyens d'entraînement comprennent une surface de contact solidaire de la cage d'un second roulement, de préférence la cage extérieure, l'autre cage de ce second roulement, de préférence la cage intérieure, étant de préférence solidaire de la cage du premier roulement solidaire de l'arbre d'entraînement, le dispositif de couplage étant interposé entre la cage du second roulement solidaire des moyens d'entraînement et l'arbre de transmission.Similarly, it is preferable that the drive means comprise a contact surface secured to the cage of a second bearing, preferably the outer cage, the other cage of the second bearing, preferably the inner cage being preferably integral with the cage of the first bearing integral with the drive shaft, the coupling device being interposed between the cage of the second bearing integral with the drive means and the transmission shaft.

Un exemple de réalisation est présenté ci-dessous à l'aide de la figure qui montre une vue en coupe partielle d'une pompe conforme à l'invention.An exemplary embodiment is presented below with the help of the figure which shows a partial sectional view of a pump according to the invention.

La pompe (1) est composée d'un boîtier (2) dans lequel se trouve une roue à aubes (3) montée sur un arbre d'entraînement (4). Des moyens d'entraînement sont prévus pour entraîner l'arbre (4) en rotation.The pump (1) is composed of a housing (2) in which there is a impeller (3) mounted on a drive shaft (4). Driving means are provided for driving the shaft (4) in rotation.

Le boîtier (1) est muni d'un palier (5) sur lequel est emmanchée la cage intérieure (6') d'un premier roulement à billes (6).The housing (1) is provided with a bearing (5) on which is fitted the inner cage (6 ') of a first ball bearing (6).

L'arbre d'entraînement (4) est solidaire de la cage extérieure (6") de ce même premier roulement (6). Pour cela, l'arbre d'entraînement se prolonge par un boîtier radial (7) qui se termine par une couronne (8) s'étendant axialement. Cette couronne (8) est emmanchée sur la cage extérieure (6') du premier roulement (6). Il va de soi qu'il serait également possible de solidariser directement le boîtier radial (7) avec la cage extérieure (6") du premier roulement (6).The drive shaft (4) is integral with the outer race (6 ") of the same first bearing (6), for which the drive shaft is extended by a radial housing (7) which ends with a ring (8) extending axially.This ring (8) is fitted on the outer casing (6 ') of the first bearing (6) It is obvious that it would also be possible to directly fasten the radial casing (7). ) with the outer cage (6 ") of the first bearing (6).

Un second roulement (9) est emmanché sur la couronne (8). La cage intérieure (9') de ce second roulement (9) est donc solidaire de l'arbre d'entraînement (4), tandis que la cage extérieure (9") sert de poulie pour une courroie d'entraînement non représentée. Il est également possible de placer une poulie sur la cage extérieure (9") de ce second roulement (9).A second bearing (9) is fitted on the crown (8). The inner race (9 ') of this second bearing (9) is thus integral with the drive shaft (4), while the outer race (9 ") serves as a pulley for a drive belt (not shown). It is also possible to place a pulley on the outer cage (9 ") of this second bearing (9).

Un joint dynamique (10) est placé entre le boîtier (2) et l'arbre d'entraînement (4) pour étancher la pompe (1) au niveau du dispositif d'entraînement.A dynamic seal (10) is placed between the housing (2) and the drive shaft (4) to seal the pump (1) at the driver.

Telle quelle, la pompe ne peut pas fonctionner. Les frottements subis par la roue à aubes dans la pompe sont trop importants pour que la rotation de la cage extérieure (9") du second roulement (9) puisse entraîner de façon significative la cage intérieure (9') et donc l'arbre d'entraînement (4).As it is, the pump can not work. The friction experienced by the impeller in the pump is too great for the rotation of the outer cage (9 ") of the second bearing (9) can significantly cause the inner cage (9 ') and therefore the shaft d training (4).

Un dispositif de couplage est donc disposé entre l'arbre d'entraînement (4) et la cage extérieure (9") du second roulement (9) pour accoupler ou désaccoupler ces deux éléments en fonction de la température de l'eau régnant dans le circuit raccordé à la pompe (1).A coupling device is therefore arranged between the drive shaft (4) and the outer race (9 ") of the second bearing (9) to couple or disconnect these two elements as a function of the temperature of the water prevailing in the circuit connected to the pump (1).

Ce dispositif de couplage est commandé en fonction de la température de l'eau dans la pompe, notamment au niveau de la roue à aubes. Un liquide visqueux rendu actif lorsque la température augmente assure le couplage hydraulique entre les moyens d'entraînement (9") et l'arbre d'entraînement (4).This coupling device is controlled as a function of the temperature of the water in the pump, particularly at the level of the impeller. A viscous liquid made active when the temperature increases ensures the hydraulic coupling between the drive means (9 ") and the drive shaft (4).

L'arbre d'entraînement (4) est creux et supporte le dispositif de couplage. Ce dernier est composé essentiellement d'un arbre tournant primaire (20) solidaire des moyens d'entraînement (9") par l'intermédiaire d'un boîtier (21). Cet arbre primaire est entouré partiellement d'un tube déformable (22) contenant un liquide pouvant se dilater sous l'effet de la chaleur.The drive shaft (4) is hollow and supports the coupling device. The latter is essentially composed of a primary rotating shaft (20) secured to the drive means (9 ") via a housing (21), this primary shaft is partially surrounded by a deformable tube (22). containing a liquid that can expand under the effect of heat.

À l'extrémité portant la roue à aubes (3), l'arbre d'entraînement (4) est fermé par un bouchon d'étanchéité (23). À l'extrémité opposée, l'arbre d'entraînement creux (4) est fermé par un joint (24) placé entre l'extrémité du tube déformable (22) et la paroi interne de l'arbre creux (4). Il y a donc une chambre fermée (25) entre le tube déformable (22) et la paroi interne de l'arbre d'entraînement (4). Cette chambre (25) est remplie d'un liquide visqueux. La quantité de liquide visqueux est choisie de telle sorte que lorsque le tube déformable (22) n'est pas déformé (basse température), la pression de liquide visqueux régnant dans la chambre (25) est insuffisante pour assurer un couplage entre l'arbre primaire (20) et l'arbre d'entraînement (4). Par contre, lorsque la température augmente, le liquide contenu dans le tube déformable se dilate provoquant la déformation du tube déformable (22) et par conséquent la compression du liquide visqueux contenu dans la chambre (25). Il se forme alors un accouplement hydraulique entre l'arbre primaire (20) et l'arbre d'entraînement (4). La rotation de l'arbre primaire (20) solidaire des moyens d'entraînement (9") entraîne donc la rotation de l'arbre d'entraînement (4) et donc de la roue à aubes (3). L'eau de refroidissement se met à circuler. Lorsque la température du liquide diminue, le liquide contenu dans le tube déformable se rétracte, le tube déformable (22) retourne dans sa position initiale et la pression du liquide visqueux diminue. L'accouplement visqueux disparaît et la rotation de l'arbre primaire (20) ne provoque plus la rotation de l'arbre d'entraînement.At the end bearing the impeller (3), the drive shaft (4) is closed by a sealing plug (23). At the opposite end, the hollow drive shaft (4) is closed by a seal (24) placed between the end of the deformable tube (22) and the inner wall of the hollow shaft (4). There is therefore a closed chamber (25) between the deformable tube (22) and the inner wall of the drive shaft (4). This chamber (25) is filled with a viscous liquid. The amount of viscous liquid is chosen such that when the deformable tube (22) is not deformed (low temperature), the viscous liquid pressure prevailing in the chamber (25) is insufficient to ensure a coupling between the shaft primary (20) and drive shaft (4). On the other hand, when the temperature increases, the liquid contained in the deformable tube expands causing the deformation of the deformable tube (22) and consequently the compression of the viscous liquid contained in the chamber (25). A hydraulic coupling is then formed between the primary shaft (20) and the drive shaft (4). The rotation of the primary shaft (20) integral with the drive means (9 ") thus causes the rotation of the drive shaft (4) and therefore of the impeller (3). When the temperature of the liquid decreases, the liquid contained in the deformable tube retracts, the deformable tube (22) returns to its initial position and the pressure of the viscous liquid decreases. The viscous coupling disappears and rotation of the primary shaft (20) no longer causes rotation of the drive shaft.

Le couplage thermique entre l'eau située au niveau de la roue à aubes et le liquide dilatable peut se faire par l'intermédiaire de l'arbre creux (4) ou le bouchon d'étanchéité (23), le liquide visqueux et le tube déformable (22).The thermal coupling between the water located at the impeller and the expandable liquid can be done via the hollow shaft (4) or the sealing plug (23), the viscous liquid and the tube deformable (22).

Selon la qualité du liquide dilatable utilisé, le passage de l'état désaccouplé à l'état accouplé peut se faire plus ou moins progressivement. Ainsi, il sera possible de concevoir la pompe de telle sorte qu'elle tourne d'autant plus vite que la température de l'eau de refroidissement est élevée, tandis qu'elle tournera moins vite si la température est moins élevée et sera à l'arrêt lorsque la température de l'eau sera en dessous d'un certain seuil.Depending on the quality of the dilatable liquid used, the transition from the uncoupled state to the coupled state can be done more or less gradually. Thus, it will be possible to design the pump so that it turns all the faster as the temperature of the cooling water is high, while it will run slower if the temperature is lower and will be at a lower temperature. stop when the water temperature is below a certain threshold.

Il va de soi que, comme dans l'état de la technique, le premier roulement servant à la rotation de l'arbre d'entraînement peut être à l'intérieur du boîtier. Il en va de même du second roulement. De même, le deuxième roulement ne doit pas impérativement être situé autour du premier.It goes without saying that, as in the state of the art, the first bearing for rotating the drive shaft may be inside the housing. The same goes for the second rotation. Likewise, the second bearing need not necessarily be located around the first one.

La courroie d'entraînement peut coopérer soit directement avec la cage extérieure (9") soit avec une poulie rendue solidaire de la cage extérieure (9") du second roulement.The drive belt can cooperate either directly with the outer cage (9 ") or with a pulley secured to the outer race (9") of the second bearing.

La régulation peut se faire de manière instantanée lorsqu'une certaine valeur seuil est atteinte, ou au contraire de façon progressive selon les besoins.The regulation can be done instantaneously when a certain threshold value is reached, or on the contrary progressively according to the needs.

Liste des références :

1
Pompe à eau
2
Boîtier de la pompe
3
Roue à aubes
4
Arbre d'entraînement de la roue à aubes
5
Palier sur le boîtier pour le premier roulement
6
Premier roulement
6' Cage intérieure du premier roulement
6" Cage extérieure du premier roulement
7
Boîtier solidaire de l'arbre d'entraînement
8
Couronne du boîtier de l'arbre d'entraînement
9
Second roulement
9' Cage intérieure du second roulement
9" Cage extérieure du second roulement
10
Joint dynamique
20
Arbre primaire
21
Boîtier de l'arbre primaire
22
Tube déformable
23
Bouchon d'étanchéité
24
Joint d'étanchéité
25
Chambre pour liquide visqueux
List of references:
1
Water pump
2
Pump housing
3
Paddle wheel
4
Drive shaft of the impeller
5
Bearing on the housing for the first bearing
6
First roll
6 'Inner cage of the first bearing
6 "Outside cage of the first bearing
7
Housing integral with the drive shaft
8
Housing crown of the drive shaft
9
Second bearing
9 'Inner cage of the second bearing
9 "Outside cage of the second bearing
10
Dynamic seal
20
Primary tree
21
Housing of the primary shaft
22
Deformable tube
23
Sealing plug
24
Seal
25
Chamber for viscous liquid

Claims (8)

Pompe à eau (1), comprenant - un corps de pompe (2) dans lequel se trouve - une roue à aubes (3) montée sur - un arbre de transmission (4), - des moyens d'entraînement (9") pour entraîner en rotation l'arbre de transmission (4), - un viscocoupleur disposé entre les moyens d'entraînement (9") et l'arbre de transmission (4) pour accoupler ou désaccoupler les moyens d'entraînement (9") et l'arbre de transmission (4) en fonction de la température régnant dans le circuit d'eau raccordé à la pompe, ledit viscocoupleur ayant une chambre de compression (25) de volume variable, - ainsi que des moyens de compression pour commander le volume de la chambre de compression (25) du viscocoupleur en fonction de la température de l'eau régnant dans le circuit raccordé à la pompe, caractérisée en ce que les moyens de compression comprennent une chambre déformable contenant un liquide dilatable sous l'effet de la chaleur et dont la paroi déformable (22) la sépare de la chambre de compression (25).Water pump (1), comprising - a pump body (2) in which is located - a paddle wheel (3) mounted on a transmission shaft (4), - drive means (9 ") for rotating the transmission shaft (4), a viscocoupler arranged between the drive means (9 ") and the transmission shaft (4) for coupling or uncoupling the drive means (9") and the transmission shaft (4) as a function of the temperature; in the water circuit connected to the pump, said viscocoupler having a compression chamber (25) of variable volume, as well as compression means for controlling the volume of the compression chamber (25) of the viscocoupler as a function of the temperature of the water prevailing in the circuit connected to the pump, characterized in that the compression means comprise a deformable chamber containing a heat-expandable liquid and whose deformable wall (22) separates it from the compression chamber (25). Pompe à eau (1) selon la revendication précédente, caractérisée en ce qu'une paroi de la chambre de compression (25) est solidaire des moyens d'entraînement (9") et une autre est solidaire de l'arbre d'entraînement (4).Water pump (1) according to the preceding claim, characterized in that one wall of the compression chamber (25) is integral with the drive means (9 ") and another is integral with the drive shaft ( 4). Pompe à eau (1) selon l'une des revendications précédentes, caractérisée en ce que la chambre déformable est solidaire de l'arbre d'entraînement (4).Water pump (1) according to one of the preceding claims, characterized in that the deformable chamber is integral with the drive shaft (4). Pompe à eau (1) selon la revendication 1 ou 2, caractérisée en ce que la chambre déformable est solidaire des moyens d'entraînement (9").Water pump (1) according to claim 1 or 2, characterized in that the deformable chamber is integral with the drive means (9 "). Pompe à eau (1) selon l'une des revendications précédentes, caractérisée en ce que l'arbre d'entraînement (4) est un arbre creux fermé à son extrémité portant la roue à aubes (3), par exemple par un bouchon d'étanchéité (23).Water pump (1) according to one of the preceding claims, characterized in that the drive shaft (4) is a closed hollow shaft at its end carrying the impeller (3), for example by a plug of sealing (23). Pompe à eau (1) selon la revendication précédente, caractérisée en ce que le dispositif de couplage comprend un arbre primaire (20) pénétrant dans l'arbre d'entraînement (4) et solidaire des moyens d'entraînement (9"), par exemple par le biais d'un boîtier (21), un tube déformable (22) étant disposé autour de l'arbre primaire (20) à l'intérieur de l'arbre d'entraînement (4) sans pour autant le toucher, un liquide dilatable sous l'effet de la chaleur étant contenu dans la chambre formée par l'espace compris entre l'arbre primaire (20) et le tube déformable (22), un liquide visqueux étant placé dans la chambre de compression (25) située entre le tube déformable et la paroi interne de l'arbre d'entraînement (4).Water pump (1) according to the preceding claim, characterized in that the coupling device comprises a primary shaft (20) penetrating into the drive shaft (4) and secured to the drive means (9 "), by example by means of a housing (21), a deformable tube (22) being arranged around the primary shaft (20) inside the drive shaft (4) without touching it, a heat-expandable liquid being contained in the chamber formed by the space between the primary shaft (20) and the deformable tube (22), a viscous liquid being placed in the compression chamber (25) located between the deformable tube and the inner wall of the drive shaft (4). Pompe à eau (1) selon l'une des revendications précédentes, caractérisée en ce que l'arbre de transmission (4) est solidaire de la cage (6") d'un premier roulement (6), de préférence la cage extérieure, l'autre cage de ce premier roulement (6), de préférence la cage intérieure, (6'), étant solidaire du corps de pompe (1).Water pump (1) according to one of the preceding claims, characterized in that the transmission shaft (4) is integral with the cage (6 ") of a first bearing (6), preferably the outer cage, the other cage of this first bearing (6), preferably the inner cage (6 ') being integral with the pump body (1). Pompe à eau (1) selon la revendication précédente, caractérisée en ce que les moyens d'entraînement comprennent une surface de contact solidaire de la cage (9") d'un second roulement (9), de préférence la cage extérieure, l'autre cage (9') de ce second roulement (9), de préférence la cage intérieure, étant de préférence solidaire de la cage (6") du premier roulement (6) solidaire de l'arbre d'entraînement, le dispositif de couplage étant interposé entre la cage (9") du second roulement (9) solidaire des moyens d'entraînement et l'arbre de transmission (4).Water pump (1) according to the preceding claim, characterized in that the drive means comprise a contact surface integral with the cage (9 ") of a second bearing (9), preferably the outer cage, the another cage (9 ') of this second bearing (9), preferably the inner cage, being preferably secured to the cage (6 ") of the first bearing (6) integral with the drive shaft, the coupling device being interposed between the cage (9 ") of the second bearing (9) integral with the drive means and the transmission shaft (4).
EP07103413A 2006-03-02 2007-03-02 Regulated water pump Active EP1830045B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0650733A FR2898154A1 (en) 2006-03-02 2006-03-02 REGULATED WATER PUMP

Publications (2)

Publication Number Publication Date
EP1830045A1 true EP1830045A1 (en) 2007-09-05
EP1830045B1 EP1830045B1 (en) 2008-05-07

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EP (1) EP1830045B1 (en)
AT (1) ATE394586T1 (en)
DE (1) DE602007000014D1 (en)
FR (1) FR2898154A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8512185B2 (en) 2008-12-12 2013-08-20 Schaeffler Technologies AG & Co. KG Switchable drive pulley with electrically actuated friction disc torque transfer mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018137045A1 (en) 2017-01-30 2018-08-02 Litens Automotive Partnership Clutched vacuum pump system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834199A1 (en) * 1978-08-04 1980-02-21 Daimler Benz Ag Engine water pump thermostatic clutch - has housing wall moved by expanding material engaging positively with clutch half
DE4325627A1 (en) * 1993-07-30 1995-02-02 Behr Gmbh & Co Drive device for a water pump
JP2001090537A (en) * 1999-09-24 2001-04-03 Isuzu Motors Ltd Water pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163835B (en) * 1984-08-30 1988-03-30 Aisin Seiki Viscous fluid couplings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834199A1 (en) * 1978-08-04 1980-02-21 Daimler Benz Ag Engine water pump thermostatic clutch - has housing wall moved by expanding material engaging positively with clutch half
DE4325627A1 (en) * 1993-07-30 1995-02-02 Behr Gmbh & Co Drive device for a water pump
JP2001090537A (en) * 1999-09-24 2001-04-03 Isuzu Motors Ltd Water pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8512185B2 (en) 2008-12-12 2013-08-20 Schaeffler Technologies AG & Co. KG Switchable drive pulley with electrically actuated friction disc torque transfer mechanism

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DE602007000014D1 (en) 2008-06-19
ATE394586T1 (en) 2008-05-15
EP1830045B1 (en) 2008-05-07
FR2898154A1 (en) 2007-09-07

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