EP3685046A1 - Variable-delivery pump device and circuit including such a pump - Google Patents

Variable-delivery pump device and circuit including such a pump

Info

Publication number
EP3685046A1
EP3685046A1 EP18785697.6A EP18785697A EP3685046A1 EP 3685046 A1 EP3685046 A1 EP 3685046A1 EP 18785697 A EP18785697 A EP 18785697A EP 3685046 A1 EP3685046 A1 EP 3685046A1
Authority
EP
European Patent Office
Prior art keywords
turbine
shutter
pump device
cam
shutter element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18785697.6A
Other languages
German (de)
French (fr)
Other versions
EP3685046B1 (en
Inventor
Nicolas Becker
Alexandre Floranc
Sébastien BRUNNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sogefi Air and Cooling SAS
Original Assignee
Sogefi Air and Cooling SAS
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 Sogefi Air and Cooling SAS filed Critical Sogefi Air and Cooling SAS
Publication of EP3685046A1 publication Critical patent/EP3685046A1/en
Application granted granted Critical
Publication of EP3685046B1 publication Critical patent/EP3685046B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor
    • 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
    • F04D15/0027—Varying behaviour or the very pump
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • 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
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature

Definitions

  • the present invention relates to the field of devices for circulating or pumping liquid fluid with a rotary member, such as a turbine, and relates to a variable flow pump device, and a circulation circuit comprising at least one least such a device.
  • Variable flow pumps have, of course, been known for a very long time, in particular for pumps with rotary delivery members provided with fins or vanes.
  • the variations in flow are obtained by varying the speed of rotation of the rotary delivery members, by action on the variable speed electric motors driving them in rotation.
  • variable flow pump devices are known in which the turbine is moved in translation in the longitudinal direction of its axis of rotation, between a deployed position in which the turbine is fully exposed to the current of the circulating flow and a retracted position in which the turbine is located outside the circulating flow, for example apart in a recess.
  • these devices cause a complex assembly of the turbine, require sufficient clearance in the direction of the axial displacement and do not do not allow to obtain a complete cut of the circulation (flow zero).
  • a closing or insulating means covers the outside by capping the circulation or discharge member, such as a turbine, so as to adjust the degree of interaction of the rotary active discharge or circulation element, in particular with blades or blades, with the flow of liquid.
  • a variable flow pump device comprising, firstly, a pump body defining a circulation chamber with at least one inlet and at least one outlet, other a turbine or similar member attached to a drive shaft rotatably mounted in the pump body at a receiving housing or mounting bearing of generally cylindrical or discoidal shape and disposed in the circulation chamber and, finally, a movable shutter member, in the direction of the longitudinal axis of the turbine shaft, in the translational chamber and covering, as a function of its axial position, adjustably the outer periphery of the turbine.
  • a cam member rotated by a controlled actuator and cooperating schematically with said shutter member for its displacement in translation, is also present inside the pump body.
  • the cam member is guided in rotation by the pump body and is located outside and around the bell-shaped shutter member, the latter also containing a compression spring urging said bell retracted non-overlapping position of the impeller.
  • the subject of the invention is a variable flow pump device of the type mentioned above and characterized in that the shutter element and the cam element have cylindrical walls and are arranged concentrically around the housing of receiving the turbine shaft, and in that the rotary cam member extends within the sliding shutter member and has on the outer face of its wall at least one helical guideway on which circulates at least one corresponding follower element integral with the inner face of the wall of the shutter member, thereby cooperatively forming a mechanism for transforming a rotary movement of the cam member about the longitudinal axis into a translational movement of the shutter element along this axis.
  • FIGS. 1A and 1B are sectional views, along a plane comprising the longitudinal axis of the turbine shaft, of a variable flow pump device according to a first embodiment of the invention, the element shutter being respectively located in a position of maximum retraction (Figure 1A) and in a maximum deployment position (Figure 1B);
  • Figure 2 is a perspective view of a pump device as shown in Figures 1A and 1B;
  • FIGS. 3 to 10 illustrate various constituent components and different steps for producing the pump device as represented in FIG. 2, namely:
  • FIGS. 4A to 4C perspective views, front (FIGS. 4A and
  • FIGS. 7A and 7B are sectional views, in a plane passing through the longitudinal axis of the turbine shaft, of a variable-flow pump device according to a second embodiment, with the shutter element in FIG. maximum retracted position (FIG. 7A) and maximum deployed position (FIG. 7B), the secondary part of the pump body being removed;
  • Fig. 8 is an exploded view illustrating symbolically the cooperation between the essential components (cam member / shutter member) of the motion transformation mechanism forming part of the pump device shown in Fig. 6;
  • Figure 9 is a partially schematic and perspective view illustrating the drive and operation of the mechanism of Figure 14;
  • Fig. 10 is a perspective view of an object similar to that of Fig. 6A, in accordance with a constructive variant of the invention according to the embodiment of Figs. 7 and 8;
  • FIG. 11 is a perspective view, similar to that of FIG. 10, of an alternative embodiment of the object represented in this latter figure, and
  • Figure 12 is a sectional view, similar to that of Figures 1 and 7, of a third embodiment of the invention, the secondary part of the pump body being removed.
  • FIGS. 1, 2 A and 7 and 12 illustrate a variable flow pump device comprising, on the one hand, a pump body 2 defining a circulation chamber 3 with at least one inlet 4 and at least one outlet 4 on the other hand, a turbine 5 or a similar rotary member fixed (e) on a drive shaft 6 rotatably mounted in the pump body 2 at a receiving housing 7 of the drive member, this turbine 5 being of discoidal general shape and disposed in the circulation chamber 3 and, finally, a shutter element 8, movable in translation according to the direction of the longitudinal axis AL of the shaft 6 and covering, as a function of its axial position, in an adjustable manner, at least a portion of the outer periphery 5 'of the turbine 5, or not.
  • a cam member 9 is rotated by an actuator 10 and kinematically co-operates with said shutter member 8 for translational movement within the pump body 2.
  • actuator 10 any rotatable member adapted to circulating or discharging a liquid, normally provided with vanes or fins and having an outer dimension of disc or cylindrical shape.
  • such a member has a generally cylindrical or discoidal general shape and has a circumferential edge, defining a band-shaped circular lateral surface with a determined dimension in the direction of the axis of rotation of the turbine: this peripheral slice corresponds to the "outer periphery 5" referred to herein.
  • the shutter member 8 and the cam member 9 have cylindrical walls 8 'and 9' and are arranged concentrically around the receiving housing 7 forming part of the pump body 2 and receiving the shaft 6 Moreover, the rotary cam element 9 is located inside the sliding shutter element 8 and has, on the outer face 9 "of its wall 9 ', at least one guide path 11 helical on which circulates at least one corresponding follower element 12 integral with the inner face 8 "of the wall 8 'of the shutter element 8.
  • These elements 8 and 9 thus form by cooperation a mechanism for transforming a rotary movement of the cam element 9 about the longitudinal axis AL in a translational movement of the shutter member 8 along this axis AL.
  • a compact and compact construction (collection and overlapping arrangement of the elements 8, 9 and the shaft of the turbine 5) is advantageously achieved both axially and radially, while at the same time benefiting, for one size overall determined, a maximum dimension of the shutter element 8 in terms of diameter and simultaneous maximization of possibility of extension of said shutter member 8 beyond the cam member 9, and thus the recovery of the periphery 5 'of the turbine 5.
  • the invention makes it possible to considerably limit the parts and areas of the pump body 2 requiring precise manufacture with a low tolerance, and to concentrate them at a limited region (the receiving housing 7).
  • the region of mutual engagement of the screw-nut connection between the elements 8 and 9 is limited to a restricted zone of the element 8, advantageously opposite its free front edge 14, in order to dispose of a height or width of the covering of the turbine 5 by the shutter element 8 in full deployment or extension position, which is maximum for a given size (in the axial direction) of said element 8.
  • the water pump devices 1 referred to herein can be of two types, namely:
  • - Or pumps mounted on a support body, for example a motor casing, possibly structurally integrated with the latter, and cooperating with the latter to form the circulation chamber 3.
  • the pump body is then in the form of a half-shell or bell and is secured in a sealed manner on the support body.
  • the reference 2 "' can designate either a part of the pump body 2 (complementary to the part 2" for example) or a part of a support body, for example a crankcase and, therefore, the references 2, 2 "may designate either the pump body in its entirety (bell-shaped), or a part 2" only of the pump body 2 ( Figures 1, 7 and 12).
  • the invention advantageously provides that the cam element 9 and the shutter element 8 form, by cooperation, a telescopic tubular assembly, the longitudinal axis of which coincides with that AL of the shaft 6 of the turbine 5 and which can pass from a fully retracted configuration in which the shutter member 8 in no way covers the outer periphery 5 'of the turbine 5, and is substantially completely folded around the cam member 9, to a fully deployed configuration in which the shutter member 8 substantially completely covers the outer periphery 5 'of the turbine 5 and extends in majority cantilever beyond the cam member 9, the reversible passage from one configuration to the other is carried out gradually and proportionally depending on the rotational position of the cam member 9 about the axis AL ( Figures 1A and 1B and Figures 7A and 7B).
  • the shutter member 8 in fully deployed position, only an extreme annular portion of the shutter member 8 remains engaged on the cam member 9, while in fully retracted position, the shutter member is fitted in an overlapping manner over substantially its entire height. (dimension along the axis AL) on the cam element 9.
  • cam member 9, the shutter member 8 and the turbine 5 with its shaft 6 are all mounted on the same part 2 "of the pump body 2, which also forms part of the receiving housing 7.
  • the invention advantageously provides that the turbine 5 is cantilevered on a free end portion of the drive shaft 6 extending beyond the receiving housing 7.
  • the invention can furthermore provide that the cam element 9 is mounted directly around said receiving housing and at the rear of said turbine 5 and advantageously has a radial extension. at most substantially equivalent to that of said turbine 5.
  • the cam element 9 and the shutter element 8 both of generally hollow cylindrical shape, have substantially equivalent dimensions along their common axis, said at least one guide path 11 formed on the outer face 9 "of the wall 9 'of the cam member 9 extending in the axial direction AL of said cam member 9, over the majority, preferably over substantially the whole, of the axial length of this element 9.
  • the elements 8 and 9 have overall conformations similar to rings or sleeves, with side walls Cylindrical 8 ', 9' on which are advantageously formed, in one piece, the various means for guiding, driving and mutual cooperation of said elements.
  • the receiving housing 7 advantageously consists of a cylindrical tube formed integrally with the wall of the pump body 2, or the main part 2 "of the latter.
  • the cylindrical tube forming the housing 7, which passes through the wall of the pump body 2 can also extend protruding outwardly of the pump body 2 to provide a sufficient housing length for the bearing of the shaft 6 without being too much protruding in the internal volume (circulation chamber 3), the shaft 6 may for example carry, on its portion opening outwards, a drive pulley 6 ".
  • the progressivity of the translational movement of the shutter element 8 can be optimized.
  • the hollow cylindrical shutter element 8 comprises at least two, preferably at least three, follower elements 12, for example in the form of lugs, pins, fingers or the like, protruding towards the internal and homogeneously distributed over its circumference, the or each guide path 11 consisting of a groove or groove extending over a fraction or over a whole tower, or even several turns in case of single path, on the outer face 9 "of the wall 9 'of the cam member 9.
  • the assembly formed by the shutter member 8 and the cam member 9 is biased by an elastic means (not shown) in a state corresponding to a total clearance of the outer periphery 5 ' the turbine 5 by the shutter member 8, with the possible also a total clearance of the supply inlet 4 and the discharge outlet 4 'of the circulation chamber 3, said elastic bias being provided by a means acting in rotation on the cam member 9, in translation on the shutter element 8 or integrated in the actuator.
  • the invention can propose, as shown for example in FIGS. 1B, 11B and 12, that in the extended position of recovery maximum of the outer periphery 5 'of the turbine 5 by the shutter member 8, the latter also sealingly sealing the outlet (s) 4' of the circulation chamber 3, this or these (s) ) being arranged radially with respect to the longitudinal axis AL of rotation of the turbine 5, on the outer periphery of the toroidal internal volume of the distribution chamber 3 extending around the turbine 5, the inlet of supply 4 opening into said chamber 3 in front of the turbine 5 in the direction of the longitudinal axis AL.
  • the hollow cylindrical shutter element 8 may comprise, at its front peripheral edge 14, a sealing means 15 adapted and intended to come into contact with an opposite wall portion of a secondary part 2 "'of the pump body 2 or with a crankcase element 2"' (as shown in FIGS. 1A and 1B) when the shutter element 8 is in the maximum deployed position, with simultaneous total overlap of the periphery 5 'outer of the turbine 5, and, where appropriate, a sealing of the outlet or exhaust 4' of the circulation chamber 3.
  • this sealing means 15 under the shape of a compression seal may, for example, be overmolded on a support ring 15 'adapted to be secured by welding with the front edge 14 of the shutter member 8 or overmolded.
  • the seal 15 bears on a wall portion of a secondary portion 2 "'of the pump body 2 facing the turbine 5.
  • the pump device 1 further comprises at least one specific, integrated or 16, 17, 25 means for axially or linearly securing the movement of the pump member. moving the shutter element 8, in addition to its translational subjection resulting from its sliding assembly on the cam member 9, this through a guide link in translation and rotational locking between the shutter member 8 and the pump body 2 ( Figures 1, 2, 4, 6, 7 and figures 11 and 14 to 16).
  • the securing means 16 consists of an annular flange which is rigidly secured to the receiving housing 7 receiving the shaft 6 of the turbine 5, via the an internal tubular extension 16 'also forming a rotational guide bearing for the cam member 9, and which comprises on its outer periphery radial formations 18 projecting and / or recessed cooperating with complementary sites 19 formed on the inner face 8 "of the cylindrical wall 8 'of the shutter member 8.
  • Said projecting and / or recessed sites 19 have an elongated and profiled structure in the axial direction AL of the cylindrical shutter element 8 and said formations 18 slide along said sites 19 during the translational movement of the shutter member 8 under the effect of the rotation of the cam member 9, the flange 16 thus ensuring a locking rota translation and guiding in translation of said shutter element 8.
  • the formations 18 and the sites 19 have mutually complementary crenellated shapes, thus ensuring engagement and guidance over the entire circumference.
  • the annular flange 16 may comprise, on its outer periphery, a seal 20 for sealing with the inner face 8 "of the cylindrical wall 8 of the shutter element 8 (FIGS. 1A, 1B, 4 and 8B).
  • tubular extension 16 'of a single piece of said flange 16 has an internal metal insert 16 "of annular shape, on which it is molded.
  • the extension 16 'with the insert 16" constitutes thus a resistant and low clearance rotatable mounting bearing for the cam element 9.
  • the securing means 17 may consist of guideways, projecting and / or reentrant, formed in a wall portion 2 'of the pump body 2 surrounding the shutter member 8, extending parallel to the direction of the longitudinal axis AL of the shaft 6 of the turbine 5 and with which come into engagement, with sliding ability, projecting and / or re-entrant formations 17 'present on the outer face 8 "' of the cylindrical wall 8 'of the shutter element 8.
  • the guideways 17 consist of rectilinear grooves parallel to the axis AL of the shaft 6 of the turbine 5 and each formed on the internal face of the wall portion 2 'of the pump body 2 (FIG. 10).
  • the external formations 17 'of the shutter element 8 consist of ribs adapted to be received in the grooves 17 of the pump body 2.
  • a shutter flange 16 (but not axial guide) and a tubular metal insert 16 "forming a rotary mounting bearing for the cam member 9, may be provided.
  • the grooves are not machined or formed directly on the pump body 2, but are formed on an insert 21 made of plastic material of PTFE (polytetrafluoroethylene) type, which is, for example, mounted tightly. in the above-mentioned wall portion 2 'of the pump body 2.
  • PTFE polytetrafluoroethylene
  • an U-shaped annular insert piece 25 may be snap-fitted into the pump body 2, around the cylindrical wall of the housing. receiving housing 7 of the shaft 6 of the turbine 5 and against a wall portion 2 'of the pump body 2. The shutter elements 8 and cam 9 mutually cooperating are then arranged in said insert part 25.
  • the wall internal cylindrical member 25 'of said insert member 25 forming a support and rotational guiding surface for the cam member 9 and the cylindrical outer wall 25 “comprises securing means 17 in the form of guideways, projecting or recessing, formed in said wall 25", extending parallel to the direction of the longitudinal axis AL of the shaft 6 of the turbine 5 and with which come into engagement, with sliding ability, protruding formations and / or re-entrant 17 'present on the outer face 8 "' of the cylindrical wall 8 'of the shutter element 8.
  • the internal volume of the annular insert part 25 with a U section is closed by an annular flange forming a cover 26 and coming into sealing engagement against the internal face of the cylindrical wall of the shutter element 8.
  • Said insert piece 25 with the shutter element 8, the cam member 9 and the annular flange 26 may constitute, if necessary, a pre-assembled subassembly before mounting in the pump body 2.
  • the motion transmission kinematic chain from the actuator 10 may comprise, in addition to possible reduction gears 10 ", a pinion or toothed wheel of drive 10 'meshing with a ring gear 23 of the cam member 9 formed integrally therewith and located opposite the front side 14 of the shutter member 8.
  • the rolling bearing 6 ' is tightly and sealingly mounted in the support bearing 7 formed in one piece with the main part 2 "of the pump body 2.
  • a seal 24 can be mounted between the axis 6 and receiving housing 7.
  • the pump body 2 is advantageously constituted by a portion 2 "including the receiving housing 7, and forming a cover or bell, which is mounted on a portion 2" 'of the crankcase, comprising in particular the feed inlet 4 and against which bears the shutter element 8 in the maximum deployed position.
  • the water pump device 1 is an independent module and the pump body consists of two parts 2 "and 2"', assembled together in a sealed manner at an assembly plane. , namely a main part (equivalent to 2 ") comprising in particular the receiving housing 7 of the shaft 6 and a secondary portion (equivalent to 2"') comprising the feed inlet 4 and on which supports the shutter element 8 in the maximum overlap position.
  • the elements 8 and 9 in particular are advantageously made of a strong and hard plastic material having a low coefficient of friction, such as PPS (polyphenylene sulfide).
  • PPS polyphenylene sulfide
  • these elements 8 and 9 are in the form of integrally molded parts.
  • the latter may furthermore comprise a position sensor (not shown) detecting the translational position of the shutter element 8, for example a magnetic sensor able to record the position of a ferromagnetic marker integrated in the shutter element 8.
  • the sensor can be integrated in the actuator 10 in the form of an angular positioning sensor of the output shaft of the actuator 10.
  • said shutter element 8 comprises at least one cutout or a passage 27 in its cylindrical wall 8 '(see FIGS. 4B, 8 and 10).
  • the invention also relates to a vehicle, in particular an automobile, comprising at least one circulation circuit for a liquid fluid, such as, for example, a cooling liquid circuit, characterized in that said circuit comprises at least one pump device. 1 as described above.
  • the circuit may further comprise at least one means for measuring the temperature of the circulating liquid fluid, whose measurement signal is used to control the actuator 10 driving the cam element 9 of the pump device 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The subject matter of the present invention is a variable-delivery pump device comprising a pump body (2), an impeller (5) and a shut-off element (8) capable of translational movement and adjustably covering at least part of the outer periphery of the impeller (5), as well as a cam element (9) which is rotationally driven and engages with said shut-off element (8) for effecting the translational movement thereof. The pump device (1) is characterized in that the shut-off element (8) and the cam element (9) have cylindrical walls (8') and are arranged concentrically around the housing (7) that accepts the shaft (6) of the impeller (5), and in that the rotary cam element (9) is situated on the inside of the sliding shut-off element (8) and, on the external face of its wall, has at least one helical guideway (11) on which there runs at least one corresponding follower element (12) secured to the internal face of the wall (8') of the shut-off element (8).

Description

Dispositif de pompe à débit variable et circuit  Variable flow pump device and circuit
comprenant une telle pompe  including such a pump
La présente invention concerne le domaine des dispositifs de mise en circulation ou de pompage de fluide liquide avec un organe rotatif, tel qu'une turbine, et a pour objet un dispositif de pompe à débit variable, ainsi qu'un circuit de circulation comprenant au moins un tel dispositif. The present invention relates to the field of devices for circulating or pumping liquid fluid with a rotary member, such as a turbine, and relates to a variable flow pump device, and a circulation circuit comprising at least one least such a device.
Les pompes à débit variable sont bien entendu connues depuis fort longtemps, en particulier pour les pompes à organes de refoulement rotatifs pourvus d'ailettes ou d'aubes.  Variable flow pumps have, of course, been known for a very long time, in particular for pumps with rotary delivery members provided with fins or vanes.
Dans la plupart des cas, les variations de débit sont obtenues en faisant varier la vitesse de rotation des organes de refoulement rotatifs, par action sur les moteurs électriques à vitesse variables les entraînant en rotation.  In most cases, the variations in flow are obtained by varying the speed of rotation of the rotary delivery members, by action on the variable speed electric motors driving them in rotation.
Toutefois, de tels moteurs sont relativement coûteux et nécessitent une électronique de gestion sophistiquée, renchérissant davantage encore leurs coûts, surtout si le débit doit être ajusté en fonction d'un paramètre de mesure, telle que la température du fluide par exemple.  However, such motors are relatively expensive and require sophisticated management electronics, further increasing their costs, especially if the flow must be adjusted according to a measurement parameter, such as the temperature of the fluid for example.
Différents systèmes ont été proposés pour faire varier le débit des pompes sans faire varier la vitesse de rotation de l'organe de refoulement rotatif, donc sans nécessiter de moteur d'entraînement à vitesse variable.  Various systems have been proposed for varying the flow rate of the pumps without varying the speed of rotation of the rotary delivery member, therefore without the need for a variable speed drive motor.
Parmi ces solutions alternatives, on peut citer en premier lieu celles mettant en œuvre des moyens de réglage du débit situés en amont ou en aval de la pompe concernée. Néanmoins, ces solutions nécessitent de contrôler un organe différent, découplé de l'action de la pompe et souvent situé à distance de celle-ci.  Among these alternative solutions, there may be mentioned first those implementing flow control means located upstream or downstream of the pump concerned. Nevertheless, these solutions require the control of a different organ, decoupled from the action of the pump and often located at a distance from it.
En outre, par exemple par les documents FR 2 870 898 et In addition, for example by documents FR 2 870 898 and
EP 1 589 228, des dispositifs de pompe à débit variable sont connus dans lesquels la turbine est déplacée en translation selon la direction longitudinale de son axe de rotation, entre une position déployée dans laquelle la turbine est exposée pleinement au courant du flux circulant et une position rétractée dans laquelle la turbine est située en dehors du flux circulant, par exemple à l'écart dans un renfoncement. Toutefois, ces dispositifs entraînent un montage complexe de la turbine, nécessitent un dégagement suffisant dans la direction du déplacement axial et ne permettent pas d'obtenir une coupure complète de la circulation (débit zéro). EP 1 589 228, variable flow pump devices are known in which the turbine is moved in translation in the longitudinal direction of its axis of rotation, between a deployed position in which the turbine is fully exposed to the current of the circulating flow and a retracted position in which the turbine is located outside the circulating flow, for example apart in a recess. However, these devices cause a complex assembly of the turbine, require sufficient clearance in the direction of the axial displacement and do not do not allow to obtain a complete cut of the circulation (flow zero).
Enfin, on connaît également des solutions dans lesquelles un moyen d'obturation ou d'isolation vient recouvrir par l'extérieur, en le coiffant, l'organe de mise en circulation ou de refoulement, tel qu'une turbine, de manière à régler le degré d'interaction de l'organe actif rotatif de refoulement ou de mise en circulation, notamment à ailettes ou à aubes, avec le flux de liquide.  Finally, solutions are also known in which a closing or insulating means covers the outside by capping the circulation or discharge member, such as a turbine, so as to adjust the degree of interaction of the rotary active discharge or circulation element, in particular with blades or blades, with the flow of liquid.
Ainsi, par le document EP 2 902 631 notamment, on connaît un dispositif de pompe à débit variable comprenant, d'une part, un corps de pompe définissant une chambre de circulation avec au moins une entrée et au moins une sortie, d'autre part, une turbine ou organe analogue fixé(e) sur un arbre d'entraînement monté rotatif dans le corps de pompe au niveau d'un logement de réception ou palier de montage, de forme générale cylindrique ou discoïdale et disposée dans la chambre de circulation et, enfin, un élément obturateur mobile, selon la direction de l'axe longitudinal de l'arbre de la turbine, dans la chambre en translation et recouvrant, en fonction de sa position axiale, de manière réglable la périphérie extérieure de la turbine. De plus, un élément de came, entraîné en rotation par un actionneur commandé et coopérant schématiquement avec ledit élément obturateur pour son déplacement en translation, est également présent à l'intérieur du corps de pompe.  Thus, in EP 2 902 631 in particular, there is known a variable flow pump device comprising, firstly, a pump body defining a circulation chamber with at least one inlet and at least one outlet, other a turbine or similar member attached to a drive shaft rotatably mounted in the pump body at a receiving housing or mounting bearing of generally cylindrical or discoidal shape and disposed in the circulation chamber and, finally, a movable shutter member, in the direction of the longitudinal axis of the turbine shaft, in the translational chamber and covering, as a function of its axial position, adjustably the outer periphery of the turbine. In addition, a cam member, rotated by a controlled actuator and cooperating schematically with said shutter member for its displacement in translation, is also present inside the pump body.
Dans cette réalisation connue, l'élément de came est guidé en rotation par le corps de pompe et est situé à l'extérieur et autour de l'élément obturateur en forme de cloche, cette dernière renfermant aussi un ressort de compression sollicitant ladite cloche en position rétractée de non recouvrement de la turbine à ailettes. Il en résulte une construction avec un encombrement radial important et nécessitant un couple important pour le déplacement en rotation de l'élément de came du fait de sa surface de guidage extérieure importante.  In this known embodiment, the cam member is guided in rotation by the pump body and is located outside and around the bell-shaped shutter member, the latter also containing a compression spring urging said bell retracted non-overlapping position of the impeller. This results in a construction with a large radial size and requiring significant torque for the rotational displacement of the cam member due to its large outer guide surface.
Par les documents US 2012/0111291 et DE 10 2008 006451 on connaît par ailleurs des dispositifs de pompe avec une turbine, un élément obturateur pour cette turbine et un élément de came commandant la position de l'élément obturateur. Toutefois, ces deux réalisations connues présentent notamment des encombrements axiaux importants, et une répartition des composantes fonctionnelles sur différentes parties du corps ou carter de la pompe. La présente invention a pour but de fournir une solution alternative à celle divulguée par EP 2 902 631, qui ne présente pas les inconvénients précités et permet aussi de surmonter au moins les principales limitations des solutions des autres documents évoqués ci- dessus. From documents US 2012/0111291 and DE 2008 006451 there are furthermore known pump devices with a turbine, a shutter element for this turbine and a cam element controlling the position of the shutter element. However, these two known embodiments have in particular significant axial dimensions, and a distribution of functional components on different parts of the body or housing of the pump. The present invention aims to provide an alternative solution to that disclosed by EP 2,902,631, which does not have the aforementioned drawbacks and also overcomes at least the main limitations of the solutions of the other documents mentioned above.
A cet effet, l'invention a pour objet un dispositif de pompe à débit variable du type évoqué ci-dessus et caractérisé en ce que l'élément obturateur et l'élément de came présentent des parois cylindriques et sont arrangés concentriquement autour du logement de réception de l'arbre de la turbine, et en ce que l'élément de came rotatoire s'étend à l'intérieur de l'élément obturateur coulissant et présente sur la face externe de sa paroi au moins un chemin de guidage hélicoïdal sur lequel circule au moins un élément suiveur correspondant solidaire de la face interne de la paroi de l'élément obturateur, formant ainsi par coopération un mécanisme de transformation d'un mouvement rotatoire de l'élément de came autour de l'axe longitudinal en un mouvement translatif de l'élément obturateur le long de cet axe.  For this purpose, the subject of the invention is a variable flow pump device of the type mentioned above and characterized in that the shutter element and the cam element have cylindrical walls and are arranged concentrically around the housing of receiving the turbine shaft, and in that the rotary cam member extends within the sliding shutter member and has on the outer face of its wall at least one helical guideway on which circulates at least one corresponding follower element integral with the inner face of the wall of the shutter member, thereby cooperatively forming a mechanism for transforming a rotary movement of the cam member about the longitudinal axis into a translational movement of the shutter element along this axis.
L'invention sera mieux comprise, grâce à la description ci- après, qui se rapporte à des modes de réalisations préférés, donnés à titre d'exemple non limitatif, et expliqués avec référence aux dessins schématiques annexés (d'échelles différentes), dans lesquels :  The invention will be better understood, thanks to the following description, which relates to preferred embodiments, given by way of non-limiting example, and explained with reference to the attached schematic drawings (of different scales), in which :
les figures 1A et 1B sont des vues en coupe, selon un plan comprenant l'axe longitudinal de l'arbre de la turbine, d'un dispositif de pompe à débit variable selon un premier mode de réalisation de l'invention, l'élément obturateur étant situé respectivement dans une position de rétraction maximale (figure 1A) et dans une position de déploiement maximal (figure 1B) ;  FIGS. 1A and 1B are sectional views, along a plane comprising the longitudinal axis of the turbine shaft, of a variable flow pump device according to a first embodiment of the invention, the element shutter being respectively located in a position of maximum retraction (Figure 1A) and in a maximum deployment position (Figure 1B);
la figure 2 est une vue en perspective d'un dispositif de pompe tel que présenté figures 1 A et 1B ;  Figure 2 is a perspective view of a pump device as shown in Figures 1A and 1B;
les figures 3 à 10 illustrent différents composants constitutifs et différentes étapes de réalisation du dispositif de pompe tel que représenté figure 2, à savoir :  FIGS. 3 to 10 illustrate various constituent components and different steps for producing the pump device as represented in FIG. 2, namely:
- figure 3 : vue en perspective d'un flasque formant moyen d'assujettissement en translation de l'élément obturateur ; - figures 4A à 4C : vues en perspective, avant (figures 4A et - Figure 3: perspective view of a flange forming means for securing in translation the shutter member; FIGS. 4A to 4C: perspective views, front (FIGS. 4A and
4B) et après (figure 4C) leur assemblage, des éléments d'un ensemble [élément de came/élément obturateur] faisant partie du dispositif de pompe ; 4B) and after (Figure 4C) their assembly, elements of a together [cam member / shutter member] forming part of the pump device;
- figure 5 : vue en perspective de l'ensemble formé après assemblage des objets représentés figures 3 et 4C ;  - Figure 5: perspective view of the assembly formed after assembly of the objects shown in Figures 3 and 4C;
- figures 6A et 6B : vues en perspective et en coupe de la partie principale du corps de pompe après montage de l'objet représenté figure 5 et avant montage de la turbine ; les figures 7A et 7B sont des vues en coupe, selon un plan passant par l'axe longitudinal de l'arbre de la turbine, d'un dispositif de pompe à débit variable selon un second mode de réalisation, avec l'élément obturateur en position rétractée maximale (figure 7A) et en position déployée maximale (figure 7B), la partie secondaire du corps de pompe étant enlevée ;  - Figures 6A and 6B: perspective and sectional views of the main part of the pump body after assembly of the object shown in Figure 5 and before mounting the turbine; FIGS. 7A and 7B are sectional views, in a plane passing through the longitudinal axis of the turbine shaft, of a variable-flow pump device according to a second embodiment, with the shutter element in FIG. maximum retracted position (FIG. 7A) and maximum deployed position (FIG. 7B), the secondary part of the pump body being removed;
la figure 8 est une vue éclatée illustrant symboliquement la coopération entre les composantes essentielles (élément de came/élément obturateur) du mécanisme de transformation du mouvement faisant partie du dispositif de pompe représenté figure 6 ;  Fig. 8 is an exploded view illustrating symbolically the cooperation between the essential components (cam member / shutter member) of the motion transformation mechanism forming part of the pump device shown in Fig. 6;
la figure 9 est une vue partiellement schématique et en perspective illustrant l'entraînement et le fonctionnement du mécanisme de la figure 14 ;  Figure 9 is a partially schematic and perspective view illustrating the drive and operation of the mechanism of Figure 14;
la figure 10 est une vue en perspective d'un objet similaire à celui de la figure 6A, en accord avec une variante constructive de l'invention conformément au mode de réalisation des figures 7 et 8 ;  Fig. 10 is a perspective view of an object similar to that of Fig. 6A, in accordance with a constructive variant of the invention according to the embodiment of Figs. 7 and 8;
la figure 11 est une vue en perspective, similaire à celle de la figure 10, d'une variante de réalisation de l'objet représenté sur cette dernière figure, et,  FIG. 11 is a perspective view, similar to that of FIG. 10, of an alternative embodiment of the object represented in this latter figure, and
la figure 12 est une vue en coupe, similaire à celle des figures 1 et 7, d'un troisième mode de réalisation de l'invention, la partie secondaire du corps de pompe étant enlevée.  Figure 12 is a sectional view, similar to that of Figures 1 and 7, of a third embodiment of the invention, the secondary part of the pump body being removed.
En particulier les figures 1, 2 A et 7 et 12 illustrent un dispositif de pompe à débit variable comprenant, d'une part, un corps de pompe 2 définissant une chambre de circulation 3 avec au moins une entrée 4 et au moins une sortie 4'd'autre part, une turbine 5 ou un organe rotatif analogue fixé(e) sur un arbre d'entraînement 6 monté rotatif dans le corps de pompe 2 au niveau d'un logement de réception 7 de l'organe d'entraînement, cette turbine 5 étant de forme générale discoïdale et disposée dans la chambre de circulation 3 et, enfin, un élément obturateur 8, mobile en translation selon la direction de l'axe longitudinal AL de l'arbre 6 et recouvrant, en fonction de sa position axiale, de manière réglable, une partie au moins de la périphérie extérieure 5' de la turbine 5, ou non. Un élément de came 9 est entraîné en rotation par un actionneur 10 et coopère cinématiquement avec ledit élément obturateur 8 pour son déplacement en translation à l'intérieur du corps de pompe 2. Par « turbine » on comprend dans la présente tout organe rotatif apte à mettre en circulation ou à refouler un liquide, normalement pourvu d'aubes ou d'ailettes et ayant un encombrement extérieur de forme discoïdale ou cylindrique. In particular, FIGS. 1, 2 A and 7 and 12 illustrate a variable flow pump device comprising, on the one hand, a pump body 2 defining a circulation chamber 3 with at least one inlet 4 and at least one outlet 4 on the other hand, a turbine 5 or a similar rotary member fixed (e) on a drive shaft 6 rotatably mounted in the pump body 2 at a receiving housing 7 of the drive member, this turbine 5 being of discoidal general shape and disposed in the circulation chamber 3 and, finally, a shutter element 8, movable in translation according to the direction of the longitudinal axis AL of the shaft 6 and covering, as a function of its axial position, in an adjustable manner, at least a portion of the outer periphery 5 'of the turbine 5, or not. A cam member 9 is rotated by an actuator 10 and kinematically co-operates with said shutter member 8 for translational movement within the pump body 2. By "turbine" is meant herein any rotatable member adapted to circulating or discharging a liquid, normally provided with vanes or fins and having an outer dimension of disc or cylindrical shape.
On comprend qu'un tel organe a une forme générale sensiblement cylindrique ou discoïdale et présente une tranche circonférentielle, définissant une surface latérale circulaire en forme de bande avec une dimension déterminée dans la direction de l'axe de rotation de la turbine : cette tranche périphérique correspond à la « périphérie extérieure 5' » visée dans la présente.  It is understood that such a member has a generally cylindrical or discoidal general shape and has a circumferential edge, defining a band-shaped circular lateral surface with a determined dimension in the direction of the axis of rotation of the turbine: this peripheral slice corresponds to the "outer periphery 5" referred to herein.
Conformément à l'invention, l'élément obturateur 8 et l'élément de came 9 présentent des parois cylindriques 8' et 9' et sont arrangés concentriquement autour du logement de réception 7 faisant partie du corps de pompe 2 et recevant l'arbre 6 de la turbine 5. De plus, l'élément de came 9 rotatoire est situé à l'intérieur de l'élément obturateur 8 coulissant et présente, sur la face externe 9" de sa paroi 9', au moins un chemin de guidage 11 hélicoïdal sur lequel circule au moins un élément suiveur correspondant 12 solidaire de la face interne 8" de la paroi 8' de l'élément obturateur 8. Ces éléments 8 et 9 forment ainsi par coopération un mécanisme de transformation d'un mouvement rotatoire de l'élément de came 9 autour de l'axe longitudinal AL en un mouvement translatif de l'élément obturateur 8 le long de cet axe AL.  According to the invention, the shutter member 8 and the cam member 9 have cylindrical walls 8 'and 9' and are arranged concentrically around the receiving housing 7 forming part of the pump body 2 and receiving the shaft 6 Moreover, the rotary cam element 9 is located inside the sliding shutter element 8 and has, on the outer face 9 "of its wall 9 ', at least one guide path 11 helical on which circulates at least one corresponding follower element 12 integral with the inner face 8 "of the wall 8 'of the shutter element 8. These elements 8 and 9 thus form by cooperation a mechanism for transforming a rotary movement of the cam element 9 about the longitudinal axis AL in a translational movement of the shutter member 8 along this axis AL.
Grâce aux dispositions particulières précitées, on aboutit profitablement à une construction regroupée et compacte (agencement ramassé et chevauchant des éléments 8, 9 et de l'arbre de la turbine 5) à la fois axialement et radialement, ce tout en bénéficiant, pour une taille globale déterminée, d'une dimension maximale de l'élément obturateur 8 en terme de diamètre et simultané d'une possibilité maximisée d'extension dudit élément obturateur 8 au-delà de l'élément de came 9, et donc de recouvrement de la périphérie 5' de la turbine 5.  Thanks to the particular provisions mentioned above, a compact and compact construction (collection and overlapping arrangement of the elements 8, 9 and the shaft of the turbine 5) is advantageously achieved both axially and radially, while at the same time benefiting, for one size overall determined, a maximum dimension of the shutter element 8 in terms of diameter and simultaneous maximization of possibility of extension of said shutter member 8 beyond the cam member 9, and thus the recovery of the periphery 5 'of the turbine 5.
En outre, en réalisant un montage concentrique des éléments 8 et 9 autour du logement de réception 7 qui reçoit avec guidage en rotation Γ arbre 6, l'invention permet de limiter considérablement les parties et zones du corps de pompe 2 nécessitant une fabrication précise avec une faible tolérance, et de les concentrer au niveau d'une région limitée (le logement de réception 7). In addition, by concentrically mounting the elements 8 and 9 around the receiving housing 7 which receives with rotation guidance In shaft 6, the invention makes it possible to considerably limit the parts and areas of the pump body 2 requiring precise manufacture with a low tolerance, and to concentrate them at a limited region (the receiving housing 7).
Bien entendu, la région d'engagement mutuel de la liaison vis- écrou entre les éléments 8 et 9 se limite à une zone restreinte de l'élément 8, avantageusement à l'opposé de son bord frontal libre 14, afin de disposer d'une hauteur ou largeur de recouvrement de la turbine 5 par l'élément obturateur 8 en position de déploiement ou d'extension complèt(e), qui est maximale pour une taille donnée (dans la direction axiale) dudit élément 8.  Of course, the region of mutual engagement of the screw-nut connection between the elements 8 and 9 is limited to a restricted zone of the element 8, advantageously opposite its free front edge 14, in order to dispose of a height or width of the covering of the turbine 5 by the shutter element 8 in full deployment or extension position, which is maximum for a given size (in the axial direction) of said element 8.
Les dispositifs 1 de pompe à eau visés dans la présente peuvent être de deux types, à savoir :  The water pump devices 1 referred to herein can be of two types, namely:
- soit des pompes séparées, dites « externes », qui forment des unités ou des modules indépendantes et dont le corps de pompe (généralement en deux parties - principale 2" et secondaire 2"' - assemblées entre elles) délimite à lui seul la chambre de circulation 3,  - or separate pumps, called "external", which form units or independent modules and whose pump body (generally in two parts - main 2 "and secondary 2" '- assembled together) delimits the chamber alone circulation 3,
- soit des pompes montées sur un corps support, par exemple un carter moteur, éventuellement structurellement intégré à ce dernier, et coopérant avec ce dernier pour former la chambre de circulation 3. Le corps de pompe se présente alors sous forme de demi-coque ou de cloche et est solidarisé de manière étanche sur le corps support.  - Or pumps mounted on a support body, for example a motor casing, possibly structurally integrated with the latter, and cooperating with the latter to form the circulation chamber 3. The pump body is then in the form of a half-shell or bell and is secured in a sealed manner on the support body.
L'homme du métier comprend par conséquent que sur les figures annexées, en particulier la figure 1, la référence 2"' peut désigner soit une partie du corps de pompe 2 (complémentaire de la partie 2" par exemple), soit une partie d'un corps support, par exemple un carter moteur et, par conséquent, les références 2, 2" peuvent désigner soit le corps de pompe dans sa totalité (en forme de cloche), soit une partie 2" seulement du corps de pompe 2 (figures 1, 7 et 12).  Those skilled in the art therefore understand that in the appended figures, in particular FIG. 1, the reference 2 "'can designate either a part of the pump body 2 (complementary to the part 2" for example) or a part of a support body, for example a crankcase and, therefore, the references 2, 2 "may designate either the pump body in its entirety (bell-shaped), or a part 2" only of the pump body 2 ( Figures 1, 7 and 12).
Plus précisément, en termes structurels et fonctionnels, l'invention prévoit avantageusement que l'élément de came 9 et l'élément obturateur 8 forment par coopération un ensemble tubulaire télescopique, dont l'axe longitudinal est confondu avec celui AL de l'arbre 6 de la turbine 5 et qui peut passer d'une configuration entièrement rétractée dans laquelle l'élément obturateur 8 ne recouvre aucunement la périphérie extérieure 5' de la turbine 5, et est sensiblement en totalité replié autour de l'élément de came 9, à une configuration entièrement déployée dans laquelle l'élément obturateur 8 recouvre sensiblement en totalité la périphérie extérieure 5' de la turbine 5 et s'étend en majorité en porte-à-faux au-delà de l'élément de came 9, le passage réversible d'une configuration à l'autre s'effectuant progressivement et proportionnellement en fonction de la position en rotation de l'élément de came 9 autour de l'axe AL (figures 1A et 1B et figures 7A et 7B). More specifically, in structural and functional terms, the invention advantageously provides that the cam element 9 and the shutter element 8 form, by cooperation, a telescopic tubular assembly, the longitudinal axis of which coincides with that AL of the shaft 6 of the turbine 5 and which can pass from a fully retracted configuration in which the shutter member 8 in no way covers the outer periphery 5 'of the turbine 5, and is substantially completely folded around the cam member 9, to a fully deployed configuration in which the shutter member 8 substantially completely covers the outer periphery 5 'of the turbine 5 and extends in majority cantilever beyond the cam member 9, the reversible passage from one configuration to the other is carried out gradually and proportionally depending on the rotational position of the cam member 9 about the axis AL (Figures 1A and 1B and Figures 7A and 7B).
Préférentiellement, en position entièrement déployée, seule une partie annulaire extrêmale de l'élément obturateur 8 demeure emboîtée sur l'élément de came 9, alors qu'en position entièrement rétractée, l'élément obturateur est emboîté de manière chevauchante sur sensiblement toute sa hauteur (dimension selon l'axe AL) sur l'élément de came 9.  Preferably, in fully deployed position, only an extreme annular portion of the shutter member 8 remains engaged on the cam member 9, while in fully retracted position, the shutter member is fitted in an overlapping manner over substantially its entire height. (dimension along the axis AL) on the cam element 9.
Comme le montrent notamment les figures 1, 2, 6, 7, 10, 11 et 12 selon une caractéristique constructive préférée de l'invention, l'élément de came 9, l'élément obturateur 8 et la turbine 5 avec son arbre 6 sont tous montés sur une même partie 2" du corps de pompe 2, dont fait également partie intégrante le logement de réception 7.  As shown in particular in Figures 1, 2, 6, 7, 10, 11 and 12 according to a preferred constructive feature of the invention, the cam member 9, the shutter member 8 and the turbine 5 with its shaft 6 are all mounted on the same part 2 "of the pump body 2, which also forms part of the receiving housing 7.
On aboutit ainsi à une construction regroupant l'ensemble des composantes fonctionnelles sur une même composante structurelle de support.  This leads to a construction grouping all the functional components on the same structural component support.
De plus, l'invention prévoit avantageusement que la turbine 5 soit montée en porte-à-faux sur une portion d'extrémité libre de l'arbre d'entraînement 6 s'étendant au-delà du logement de réception 7.  In addition, the invention advantageously provides that the turbine 5 is cantilevered on a free end portion of the drive shaft 6 extending beyond the receiving housing 7.
Pour obtenir une construction dont l'encombrement est réduit au maximum, l'invention peut prévoir en outre que l'élément de came 9 soit monté directement autour dudit logement de réception et à l'arrière de ladite turbine 5 et présente avantageusement une extension radiale au plus sensiblement équivalente à celle de ladite turbine 5.  In order to obtain a construction whose overall dimensions are reduced to the maximum, the invention can furthermore provide that the cam element 9 is mounted directly around said receiving housing and at the rear of said turbine 5 and advantageously has a radial extension. at most substantially equivalent to that of said turbine 5.
A des fins d'optimisation constructive, l'élément de came 9 et l'élément obturateur 8, tous deux de forme générale cylindrique creuse, présentent des dimensions sensiblement équivalentes selon leur axe commun, ledit au moins un chemin de guidage 11 ménagé sur la face externe 9" de la paroi 9' de l'élément de came 9 s'étendant dans la direction axiale AL dudit élément de came 9, sur la majorité, préférentiellement sur sensiblement la totalité, de la longueur axiale de cet élément 9.  For the purpose of constructive optimization, the cam element 9 and the shutter element 8, both of generally hollow cylindrical shape, have substantially equivalent dimensions along their common axis, said at least one guide path 11 formed on the outer face 9 "of the wall 9 'of the cam member 9 extending in the axial direction AL of said cam member 9, over the majority, preferably over substantially the whole, of the axial length of this element 9.
Comme illustré sur les figures annexées à titre d'exemples constructifs préférés, les éléments 8 et 9 présentent des conformations globales similaires à des bagues ou des manchons, avec des parois latérales 8', 9' cylindriques sur lesquelles sont avantageusement formés, d'un seul tenant, les différents moyens de guidage, d'entraînement et de coopération mutuelle desdits éléments. As illustrated in the appended figures as preferred constructive examples, the elements 8 and 9 have overall conformations similar to rings or sleeves, with side walls Cylindrical 8 ', 9' on which are advantageously formed, in one piece, the various means for guiding, driving and mutual cooperation of said elements.
Comme le montrent également les figures annexées, le logement de réception 7 consiste avantageusement en un tube cylindrique formé d'un seul tenant avec la paroi du corps de pompe 2, ou la partie principale 2" de ce dernier. Ce tube cylindrique 7 reçoit, à l'intérieur, l'arbre 6 de la turbine 5 avec son palier rotatoire 6' et porte, sur l'extérieur, les éléments 8 et 9 au moins. Comme le montrent par exemple les figures 1 A et 1B, le tube cylindrique formant le logement 7, qui traverse la paroi du corps de pompe 2, peut également s'étendre de manière saillante vers l'extérieur du corps de pompe 2 pour fournir une longueur de logement suffisante pour le palier de l'arbre 6 sans être trop proéminent dans le volume interne (chambre de circulation 3). L'arbre 6 peut par exemple porter, sur sa portion débouchant sur l'extérieur, une poulie d'entraînement 6".  As also shown in the appended figures, the receiving housing 7 advantageously consists of a cylindrical tube formed integrally with the wall of the pump body 2, or the main part 2 "of the latter. inside, the shaft 6 of the turbine 5 with its rotary bearing 6 'and carries, on the outside, the elements 8 and 9 at least, As shown for example in Figures 1A and 1B, the cylindrical tube forming the housing 7, which passes through the wall of the pump body 2, can also extend protruding outwardly of the pump body 2 to provide a sufficient housing length for the bearing of the shaft 6 without being too much protruding in the internal volume (circulation chamber 3), the shaft 6 may for example carry, on its portion opening outwards, a drive pulley 6 ".
Ainsi, la progressivité du mouvement translatif de l'élément obturateur 8 peut être optimisée.  Thus, the progressivity of the translational movement of the shutter element 8 can be optimized.
En accord avec une réalisation pratique avantageuse, l'élément obturateur 8 cylindrique creux comporte au moins deux, préférentiellement au moins trois, éléments suiveurs 12, par exemple sous la forme d'ergots, de pions, de doigts ou analogues, saillants vers l'intérieur et répartis de manière homogène sur sa circonférence, le ou chaque chemin de guidage 11 consistant en une gorge ou rainure s 'étendant sur une fraction ou sur la totalité d'un tour, voire sur plusieurs tours en cas de chemin unique, sur la face extérieure 9" de la paroi 9' de l'élément de came 9.  In accordance with an advantageous practical embodiment, the hollow cylindrical shutter element 8 comprises at least two, preferably at least three, follower elements 12, for example in the form of lugs, pins, fingers or the like, protruding towards the internal and homogeneously distributed over its circumference, the or each guide path 11 consisting of a groove or groove extending over a fraction or over a whole tower, or even several turns in case of single path, on the outer face 9 "of the wall 9 'of the cam member 9.
Dans certains domaines d'application, il est obligatoire, pour des raisons de sécurité, de pouvoir garantir un état donné de la pompe, et donc un positionnement déterminé de l'élément obturateur 8 en cas de défaillance de l'actionneur 10.  In certain fields of application, it is mandatory, for reasons of safety, to be able to guarantee a given state of the pump, and therefore a determined positioning of the shutter element 8 in the event of failure of the actuator 10.
A cet effet, il peut être prévu que l'ensemble formé par l'élément obturateur 8 et l'élément de came 9 est sollicité par un moyen élastique (non représenté) dans un état correspondant à un dégagement total de la périphérie extérieure 5' de la turbine 5 par l'élément obturateur 8, avec le cas échéant également un dégagement total de l'entrée d'alimentation 4 et de la sortie d'évacuation 4' de la chambre de circulation 3, ladite sollicitation élastique étant fournie par un moyen agissant en rotation sur l'élément de came 9, en translation sur l'élément obturateur 8 ou intégré dans l'actionneur. For this purpose, it may be provided that the assembly formed by the shutter member 8 and the cam member 9 is biased by an elastic means (not shown) in a state corresponding to a total clearance of the outer periphery 5 ' the turbine 5 by the shutter member 8, with the possible also a total clearance of the supply inlet 4 and the discharge outlet 4 'of the circulation chamber 3, said elastic bias being provided by a means acting in rotation on the cam member 9, in translation on the shutter element 8 or integrated in the actuator.
Afin de pouvoir garantir la fourniture d'un état avec une circulation nulle, que la turbine 5 soit entraînée ou non, l'invention peut proposer, comme le montrent par exemple les figures 1B, 11B et 12, qu'en position déployée de recouvrement maximal de la périphérie extérieure 5' de la turbine 5 par l'élément obturateur 8, ce dernier obture également de manière étanche la ou les sortie(s) d'évacuation 4' de la chambre de circulation 3, cette ou ces dernière(s) étant arrangée(s) radialement par rapport à l'axe longitudinal AL de rotation de la turbine 5, sur la périphérie extérieure du volume interne toroïdal de la chambre de distribution 3 s' étendant autour de la turbine 5, l'entrée d'alimentation 4 débouchant dans ladite chambre 3 en face de la turbine 5 dans la direction de l'axe longitudinal AL.  In order to be able to guarantee the supply of a state with zero circulation, whether the turbine 5 is driven or not, the invention can propose, as shown for example in FIGS. 1B, 11B and 12, that in the extended position of recovery maximum of the outer periphery 5 'of the turbine 5 by the shutter member 8, the latter also sealingly sealing the outlet (s) 4' of the circulation chamber 3, this or these (s) ) being arranged radially with respect to the longitudinal axis AL of rotation of the turbine 5, on the outer periphery of the toroidal internal volume of the distribution chamber 3 extending around the turbine 5, the inlet of supply 4 opening into said chamber 3 in front of the turbine 5 in the direction of the longitudinal axis AL.
En particulier pour pouvoir réaliser la fonction précitée, l'élément obturateur 8 cylindrique creux peut comporter, au niveau de son bord périphérique frontal 14, un moyen d'étanchéité 15 apte et destiné à venir en contact avec une portion de paroi opposée d'une partie secondaire 2"' du corps de pompe 2 ou avec un élément du carter moteur 2"' (comme représenté sur les figures 1A et 1B) lorsque l'élément obturateur 8 est en position déployée maximale, avec simultanément un recouvrement total de la périphérie extérieure 5' de la turbine 5, et, le cas échéant, une obturation étanche de la ou des sorties d'évacuation 4' de la chambre de circulation 3. Comme le montre plus particulièrement la figure 7, ce moyen d'étanchéité 15 sous la forme d'un joint de compression peut, par exemple, être surmoulé sur un anneau support 15' apte à être solidarisé par soudure avec le bord frontal 14 de l'élément obturateur 8 ou surmoulé.  In particular, in order to carry out the aforementioned function, the hollow cylindrical shutter element 8 may comprise, at its front peripheral edge 14, a sealing means 15 adapted and intended to come into contact with an opposite wall portion of a secondary part 2 "'of the pump body 2 or with a crankcase element 2"' (as shown in FIGS. 1A and 1B) when the shutter element 8 is in the maximum deployed position, with simultaneous total overlap of the periphery 5 'outer of the turbine 5, and, where appropriate, a sealing of the outlet or exhaust 4' of the circulation chamber 3. As shown more particularly in Figure 7, this sealing means 15 under the shape of a compression seal may, for example, be overmolded on a support ring 15 'adapted to be secured by welding with the front edge 14 of the shutter member 8 or overmolded.
Dans l'alternative où le dispositif de pompe à eau 1 est, dans le cadre de l'application préférée de l'invention, un module indépendant rapporté sur le carter moteur 2"', le joint d'étanchéité 15 vient en appui sur une portion de paroi d'une partie secondaire 2"' du corps de pompe 2 située en regard de la turbine 5.  In the alternative where the water pump device 1 is, in the context of the preferred application of the invention, an independent module attached to the crankcase 2 "', the seal 15 bears on a wall portion of a secondary portion 2 "'of the pump body 2 facing the turbine 5.
En vue de fournir un guidage sûr et précis à l'élément obturateur 8, le dispositif de pompe 1 comprend, en outre, au moins un moyen 16, 17, 25 spécifique, rapporté ou intégré, d'assujettissement axial ou linéaire du mouvement de déplacement de l'élément obturateur 8, en plus de son assujettissement translatif résultant de son montage coulissant sur l'élément de came 9, ce par le biais d'une liaison de guidage en translation et de blocage en rotation entre l'élément obturateur 8 et le corps de pompe 2 (figures 1, 2, 4, 6, 7 et figures 11 et 14 à 16). In order to provide a safe and accurate guidance to the shutter member 8, the pump device 1 further comprises at least one specific, integrated or 16, 17, 25 means for axially or linearly securing the movement of the pump member. moving the shutter element 8, in addition to its translational subjection resulting from its sliding assembly on the cam member 9, this through a guide link in translation and rotational locking between the shutter member 8 and the pump body 2 (Figures 1, 2, 4, 6, 7 and figures 11 and 14 to 16).
Un tel déplacement uniquement en translation selon l'axe AL de l'élément obturateur 8, préférentiellement avec des zones de guidage multiples, permet en outre une mise en appui homogène et frontale du joint 15 à l'état déployé dudit élément 8.  Such displacement only in translation along the axis AL of the shutter element 8, preferably with multiple guide zones, further allows a homogeneous and frontal bearing of the seal 15 in the deployed state of said element 8.
Selon un premier mode de réalisation, illustré aux figures 1 à 10, le moyen d'assujettissement 16 consiste en un flasque annulaire qui est solidarisé rigidement avec le logement de réception 7 recevant l'arbre 6 de la turbine 5, ce par l'intermédiaire d'un prolongement tubulaire interne 16' formant également palier de guidage en rotation pour l'élément de came 9, et qui comporte sur sa périphérie extérieure des formations radiales 18 saillantes et/ou enfoncées coopérant avec des sites complémentaires 19 ménagés sur la face interne 8" de la paroi cylindrique 8' de l'élément obturateur 8. Lesdits sites saillants et/ou enfoncés 19 présentent une structure allongée et profilée dans la direction axiale AL de l'élément obturateur cylindrique 8 et lesdites formations 18 coulissent le long desdits sites 19 lors du déplacement en translation de l'élément obturateur 8 sous l'effet de la rotation de l'élément de came 9, ce flasque 16 assurant ainsi un blocage en rotation et un guidage en translation dudit élément obturateur 8.  According to a first embodiment, illustrated in FIGS. 1 to 10, the securing means 16 consists of an annular flange which is rigidly secured to the receiving housing 7 receiving the shaft 6 of the turbine 5, via the an internal tubular extension 16 'also forming a rotational guide bearing for the cam member 9, and which comprises on its outer periphery radial formations 18 projecting and / or recessed cooperating with complementary sites 19 formed on the inner face 8 "of the cylindrical wall 8 'of the shutter member 8. Said projecting and / or recessed sites 19 have an elongated and profiled structure in the axial direction AL of the cylindrical shutter element 8 and said formations 18 slide along said sites 19 during the translational movement of the shutter member 8 under the effect of the rotation of the cam member 9, the flange 16 thus ensuring a locking rota translation and guiding in translation of said shutter element 8.
Préférentiellement, les formations 18 et les sites 19 présentent des formes crénelées mutuellement complémentaires, assurant ainsi un engagement et un guidage sur toute la circonférence.  Preferentially, the formations 18 and the sites 19 have mutually complementary crenellated shapes, thus ensuring engagement and guidance over the entire circumference.
Afin de pouvoir fournir, lorsque le bord 14 est pourvu d'un joint 15, une construction en forme de cloche à l'état déployé maximal de l'élément obturateur 8 et en appui sur la partie correspondante de la paroi du corps de pompe 2, apte à définir un volume étanche (le logement de réception 7 étant lui-même étanchéifié), le flasque annulaire 16 peut comporter, sur sa périphérie extérieure, un joint 20 pour réaliser une étanchéité avec la face interne 8" de la paroi cylindrique 8' de l'élément obturateur 8 (figures 1A, 1B, 4 et 8B).  In order to be able to provide, when the edge 14 is provided with a seal 15, a bell-shaped construction in the maximum deployed state of the shutter element 8 and resting on the corresponding part of the wall of the pump body 2 , able to define a sealed volume (the receiving housing 7 being itself sealed), the annular flange 16 may comprise, on its outer periphery, a seal 20 for sealing with the inner face 8 "of the cylindrical wall 8 of the shutter element 8 (FIGS. 1A, 1B, 4 and 8B).
En outre, et en vue d'assurer un montage précis et résistant de l'ensemble [éléments 8 et 9 et flasque 16] sur le logement de réception 7, il peut être prévu que le prolongement tubulaire 16' d'un seul tenant dudit flasque 16 comporte un insert métallique interne 16" de forme annulaire, sur lequel il est surmoulé. Le prolongement 16' avec l'insert 16" constitue ainsi un palier de montage rotatoire résistant et à faible jeu pour l'élément de came 9. In addition, and in order to ensure a precise and resistant assembly of the assembly [elements 8 and 9 and flange 16] on the receiving housing 7, it can be provided that the tubular extension 16 'of a single piece of said flange 16 has an internal metal insert 16 "of annular shape, on which it is molded.The extension 16 'with the insert 16" constitutes thus a resistant and low clearance rotatable mounting bearing for the cam element 9.
Selon un autre mode de réalisation de l'invention, ressortant des figures 7 à 11, les moyens d'assujettissement 17 peuvent consister en des chemins de guidage, saillants et/ou rentrants, formés dans une partie de paroi 2' du corps de pompe 2 entourant l'élément obturateur 8, s'étendant parallèlement à la direction de l'axe longitudinal AL de l'arbre 6 de la turbine 5 et avec lesquels viennent en engagement, avec faculté de coulissement, des formations saillantes et/ou rentrantes 17' présentes sur la face externe 8"' de la paroi cylindrique 8' de l'élément obturateur 8.  According to another embodiment of the invention, as shown in FIGS. 7 to 11, the securing means 17 may consist of guideways, projecting and / or reentrant, formed in a wall portion 2 'of the pump body 2 surrounding the shutter member 8, extending parallel to the direction of the longitudinal axis AL of the shaft 6 of the turbine 5 and with which come into engagement, with sliding ability, projecting and / or re-entrant formations 17 'present on the outer face 8 "' of the cylindrical wall 8 'of the shutter element 8.
Avantageusement, les chemins de guidage 17 consistent en des rainures rectilignes parallèles à l'axe AL de l'arbre 6 de la turbine 5 et formées chacune sur la face interne de la partie de paroi 2' du corps de pompe 2 (figure 10), et les formations externes 17' de l'élément obturateur 8 consistent en des nervures adaptées pour être reçues dans les rainures 17 du corps de pompe 2.  Advantageously, the guideways 17 consist of rectilinear grooves parallel to the axis AL of the shaft 6 of the turbine 5 and each formed on the internal face of the wall portion 2 'of the pump body 2 (FIG. 10). , and the external formations 17 'of the shutter element 8 consist of ribs adapted to be received in the grooves 17 of the pump body 2.
Dans cette réalisation également, un flasque 16 d'obturation (mais non de guidage axial) et un insert métallique tubulaire 16", formant palier de montage rotatif pour l'élément de came 9, peuvent être prévus.  In this embodiment also, a shutter flange 16 (but not axial guide) and a tubular metal insert 16 "forming a rotary mounting bearing for the cam member 9, may be provided.
Selon un autre mode de réalisation (figure 11), les rainures ne sont pas usinées ou formées directement sur le corps de pompe 2, mais sont formées sur un insert 21 en matière plastique de type PTFE (polytétrafluoroéthylène), lequel est par exemple monté serré dans la partie de paroi 2' précitée du corps de pompe 2.  According to another embodiment (FIG. 11), the grooves are not machined or formed directly on the pump body 2, but are formed on an insert 21 made of plastic material of PTFE (polytetrafluoroethylene) type, which is, for example, mounted tightly. in the above-mentioned wall portion 2 'of the pump body 2.
Plus précisément, dans ce dernier cas, les chemins de guidage More precisely, in the latter case, the guide paths
17 sont formés sur ou dans une pièce d' insert 21 rapportée par emboîtement dans le corps de pompe 2, autour du logement de réception 7 de l'arbre 6 de la turbine 5 et contre ou dans une partie de paroi 2' du corps de pompe 2 entourant l'élément obturateur 8 (figure 11). 17 are formed on or in an insert part 21 inserted by fitting into the pump body 2, around the receiving housing 7 of the shaft 6 of the turbine 5 and against or in a wall portion 2 'of the body of pump 2 surrounding the shutter element 8 (Figure 11).
En accord avec encore un autre mode de réalisation, illustré à titre d'exemple sur la figure 12, une pièce d' insert annulaire 25 à section en U peut être montée par emboîtement dans le corps de pompe 2, autour de la paroi cylindrique du logement de réception 7 de l'arbre 6 de la turbine 5 et contre une partie de paroi 2' du corps de pompe 2. Les éléments obturateur 8 et de came 9 mutuellement coopérants sont alors arrangés dans ladite pièce d' insert 25. La paroi interne cylindrique 25' de ladite pièce d' insert 25 forme surface de support et de guidage en rotation pour l'élément de came 9 et la paroi externe cylindrique 25" comporte des moyens d'assujettissement 17 sous forme de chemins de guidage, saillants ou rentrants, formés dans ladite paroi 25", s'étendant parallèlement à la direction de l'axe longitudinal AL de l'arbre 6 de la turbine 5 et avec lesquels viennent en engagement, avec faculté de coulissement, des formations saillantes et/ou rentrantes 17' présentes sur la face externe 8"' de la paroi cylindrique 8' de l'élément obturateur 8. In accordance with still another embodiment, illustrated by way of example in FIG. 12, an U-shaped annular insert piece 25 may be snap-fitted into the pump body 2, around the cylindrical wall of the housing. receiving housing 7 of the shaft 6 of the turbine 5 and against a wall portion 2 'of the pump body 2. The shutter elements 8 and cam 9 mutually cooperating are then arranged in said insert part 25. The wall internal cylindrical member 25 'of said insert member 25 forming a support and rotational guiding surface for the cam member 9 and the cylindrical outer wall 25 "comprises securing means 17 in the form of guideways, projecting or recessing, formed in said wall 25", extending parallel to the direction of the longitudinal axis AL of the shaft 6 of the turbine 5 and with which come into engagement, with sliding ability, protruding formations and / or re-entrant 17 'present on the outer face 8 "' of the cylindrical wall 8 'of the shutter element 8.
Selon une caractéristique additionnelle, le volume interne de la pièce d' insert annulaire 25 à section en U est fermé par un flasque annulaire formant couvercle 26 et venant en appui étanche contre la face interne de la paroi cylindrique de l'élément obturateur 8.  According to an additional characteristic, the internal volume of the annular insert part 25 with a U section is closed by an annular flange forming a cover 26 and coming into sealing engagement against the internal face of the cylindrical wall of the shutter element 8.
Ladite pièce d'insert 25 avec l'élément obturateur 8, l'élément de came 9 et le flasque annulaire 26 peut constituer le cas échéant un sous- ensemble pré-assemblé avant montage dans le corps de pompe 2.  Said insert piece 25 with the shutter element 8, the cam member 9 and the annular flange 26 may constitute, if necessary, a pre-assembled subassembly before mounting in the pump body 2.
Comme le montrent notamment les figures 1, 2, 7, 9 et 12, la chaîne cinématique de transmission du mouvement depuis l'actionneur 10 peut comporter, en plus d'éventuels engrenages réducteurs 10", un(e) pignon ou roue dentée d'entraînement 10' engrênant avec une couronne dentée 23 de l'élément de came 9, formée d'un seul tenant avec ce dernier et située à l'opposé du côté frontal 14 de l'élément obturateur 8.  As shown in particular in Figures 1, 2, 7, 9 and 12, the motion transmission kinematic chain from the actuator 10 may comprise, in addition to possible reduction gears 10 ", a pinion or toothed wheel of drive 10 'meshing with a ring gear 23 of the cam member 9 formed integrally therewith and located opposite the front side 14 of the shutter member 8.
Le palier à roulements 6' est monté de manière serrée et étanche dans le palier support 7 formé d'un seul tenant avec la partie principale 2" du corps de pompe 2. En outre, une garniture d'étanchéité 24 peut être montée entre l'axe 6 et le logement de réception 7.  The rolling bearing 6 'is tightly and sealingly mounted in the support bearing 7 formed in one piece with the main part 2 "of the pump body 2. In addition, a seal 24 can be mounted between the axis 6 and receiving housing 7.
Selon un premier mode de réalisation, le corps de pompe 2 est avantageusement constitué d'une partie 2" comprenant notamment le logement de réception 7, et formant couvercle ou cloche, qui vient se monter sur une partie 2"' de carter moteur, comprenant notamment l'entrée d'alimentation 4 et contre laquelle vient en appui l'élément obturateur 8 en position déployée maximale.  According to a first embodiment, the pump body 2 is advantageously constituted by a portion 2 "including the receiving housing 7, and forming a cover or bell, which is mounted on a portion 2" 'of the crankcase, comprising in particular the feed inlet 4 and against which bears the shutter element 8 in the maximum deployed position.
Dans un autre mode de réalisation, le dispositif de pompe à eau 1 est un module indépendant et le corps de pompe est constitué de deux parties 2" et 2"', assemblées entre elles de manière étanche au niveau d'un plan d'assemblage, à savoir une partie principale (équivalente à 2") comprenant notamment le logement de réception 7 de l'arbre 6 et une partie secondaire (équivalente à 2"') comprenant l'entrée d'alimentation 4 et sur laquelle vient en appui l'élément obturateur 8 en position de recouvrement maximal. In another embodiment, the water pump device 1 is an independent module and the pump body consists of two parts 2 "and 2"', assembled together in a sealed manner at an assembly plane. , namely a main part (equivalent to 2 ") comprising in particular the receiving housing 7 of the shaft 6 and a secondary portion (equivalent to 2"') comprising the feed inlet 4 and on which supports the shutter element 8 in the maximum overlap position.
Les éléments 8 et 9 notamment sont avantageusement réalisés en un matériau plastique résistant et dur présentant un faible coefficient de friction, tel que du PPS (poly sulfure de phénylène). Préférentiellement, et comme cela ressort en particulier des figures annexées, ces éléments 8 et 9 se présentent sous la forme de pièces monoblocs venant de moulage.  The elements 8 and 9 in particular are advantageously made of a strong and hard plastic material having a low coefficient of friction, such as PPS (polyphenylene sulfide). Preferably, and as is apparent in particular from the accompanying figures, these elements 8 and 9 are in the form of integrally molded parts.
Pour pouvoir commander de manière contrôlée la position de l'élément obturateur 8, et donc de pouvoir maîtriser le réglage du débit du dispositif de pompe 1, ce dernier peut comprendre en outre un capteur de position (non représenté) détectant la position en translation de l'élément obturateur 8, par exemple un capteur magnétique apte à relever la position d'un marqueur ferromagnétique intégré dans l'élément obturateur 8. Selon d'autres formes de réalisation, le capteur peut être intégré dans Γ actionneur 10 sous la forme d'un capteur de positionnement angulaire de l'arbre de sortie de Γ actionneur 10.  In order to be able to control in a controlled manner the position of the shutter element 8, and thus to be able to control the flow rate adjustment of the pump device 1, the latter may furthermore comprise a position sensor (not shown) detecting the translational position of the shutter element 8, for example a magnetic sensor able to record the position of a ferromagnetic marker integrated in the shutter element 8. According to other embodiments, the sensor can be integrated in the actuator 10 in the form of an angular positioning sensor of the output shaft of the actuator 10.
Afin de pouvoir garantir un débit minimal en cas de déploiement complet de l'élément obturateur 8, le cas échéant avec appui du joint 15, il peut être prévu que ledit élément obturateur 8 comporte au moins une découpe ou un passage 27 dans sa paroi cylindrique 8' (cf. figures 4B, 8 et 10).  In order to be able to guarantee a minimum flow rate in the event of complete deployment of the shutter element 8, possibly with support of the seal 15, it can be provided that said shutter element 8 comprises at least one cutout or a passage 27 in its cylindrical wall 8 '(see FIGS. 4B, 8 and 10).
L'invention porte également sur un véhicule, notamment, automobile, comprenant au moins un circuit de circulation d'un fluide liquide, tel que par exemple un circuit de liquide de refroidissement, caractérisé en ce que ledit circuit comprend au moins un dispositif de pompe 1 tel que décrit ci-dessus.  The invention also relates to a vehicle, in particular an automobile, comprising at least one circulation circuit for a liquid fluid, such as, for example, a cooling liquid circuit, characterized in that said circuit comprises at least one pump device. 1 as described above.
Avantageusement, le circuit peut en outre comprendre au moins un moyen de mesure de la température du fluide liquide en circulation, dont le signal de mesure est exploité pour commander Γ actionneur 10 entraînant l'élément de came 9 du dispositif de pompe 1.  Advantageously, the circuit may further comprise at least one means for measuring the temperature of the circulating liquid fluid, whose measurement signal is used to control the actuator 10 driving the cam element 9 of the pump device 1.
Bien entendu, l'invention n'est pas limitée aux modes de réalisations décrits et représentés aux dessins annexés. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.  Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

REVENDICATIONS
1. Dispositif de pompe à débit variable comprenant, d'une part, un corps de pompe (2) définissant, seul ou par coopération avec un corps support, une chambre de circulation (3) avec au moins une entrée (4) et au moins une sortie (4'), d'autre part, une turbine (5) ou un organe rotatif analogue fixé(e) sur un arbre d'entraînement (6) monté rotatif dans le corps de pompe (2) au niveau d'un logement de réception (7), cette turbine (5) étant de forme générale sensiblement cylindrique ou discoïdale et disposée dans la chambre de circulation (3) et, enfin, un élément obturateur (8), mobile en translation selon la direction de l'axe longitudinal (AL) de l'arbre (6) de la turbine (5) dans la chambre (3) et recouvrant, de manière réglable, en fonction de sa position axiale, une partie au moins de la périphérie extérieure (5') de la turbine (5), ou non, un élément de came (9), entraîné en rotation par un actionneur (10) et coopérant cinématiquement avec ledit élément obturateur (8) pour son déplacement en translation, étant également présent à l'intérieur du corps de pompe (2), A variable-flow pump device comprising, on the one hand, a pump body (2) defining, alone or in cooperation with a support body, a circulation chamber (3) with at least one inlet (4) and at least one least one outlet (4 '), on the other hand, a turbine (5) or a similar rotary member fixed (e) on a drive shaft (6) rotatably mounted in the pump body (2) at the level of a receiving housing (7), this turbine (5) being of substantially cylindrical or discoidal general shape and disposed in the circulation chamber (3) and, finally, a shutter member (8) movable in translation in the direction of the longitudinal axis (AL) of the shaft (6) of the turbine (5) in the chamber (3) and adjustably covering, depending on its axial position, at least part of the outer periphery (5 ' ) of the turbine (5), or not, a cam element (9), rotated by an actuator (10) and co-operating kinematically with said element shutter (8) for its displacement in translation, also being present inside the pump body (2),
dispositif de pompe (1) caractérisé en ce que l'élément obturateur (8) et l'élément de came (9) présentent des parois cylindriques (8' et 9') et sont arrangés concentriquement autour du logement de réception (7) faisant partie du corps de pompe (2) et recevant l'arbre (6) de la turbine (5), et en ce que l'élément de came (9) rotatoire est situé à l'intérieur de l'élément obturateur (8) coulissant et présente, sur la face externe (9") de sa paroi (9'), au moins un chemin de guidage (11) hélicoïdal sur lequel circule au moins un élément suiveur correspondant (12) solidaire de la face interne (8") de la paroi (8') de l'élément obturateur (8), ces éléments (8 et 9) formant ainsi par coopération un mécanisme de transformation d'un mouvement rotatoire de l'élément de came (9) autour de l'axe longitudinal (AL) en un mouvement translatif de l'élément obturateur (8) le long de cet axe (AL).  pump device (1) characterized in that the shutter element (8) and the cam element (9) have cylindrical walls (8 'and 9') and are arranged concentrically around the receiving housing (7) making part of the pump body (2) and receiving the shaft (6) of the turbine (5), and in that the rotary cam element (9) is located inside the shutter element (8) sliding and has, on the outer face (9 ") of its wall (9 '), at least one helical guide path (11) on which circulates at least one corresponding follower element (12) integral with the inner face (8") ) of the wall (8 ') of the shutter element (8), these elements (8 and 9) thus forming by cooperation a mechanism for transforming a rotary movement of the cam element (9) around the longitudinal axis (AL) in a translational movement of the shutter element (8) along this axis (AL).
2. Dispositif de pompe selon la revendication 1, caractérisé en ce que l'élément de came (9) et l'élément obturateur (8) forment par coopération un ensemble tubulaire télescopique, dont l'axe longitudinal est confondu avec celui (AL) de l'arbre (6) de la turbine (5) et qui peut passer d'une configuration entièrement rétractée dans laquelle l'élément obturateur (8) ne recouvre aucunement la périphérie extérieure (5') de la turbine (5), et est sensiblement en totalité replié autour de l'élément de came (9), les deux éléments (8 et 9) étant alors arrangés l'un dans l'autre, à une configuration entièrement déployée dans laquelle l'élément obturateur (8) recouvre sensiblement en totalité la périphérie extérieure (5') de la turbine (5) et s'étend en majorité en porte-à-faux au-delà de l'élément de came (9), le passage réversible d'une configuration à l'autre s'effectuant progressivement et proportionnellement en fonction de la position en rotation de l'élément de came (9) autour de l'axe (AL). Pump device according to Claim 1, characterized in that the cam element (9) and the shutter element (8) cooperate with a telescopic tubular assembly, the longitudinal axis of which coincides with that (AL). the shaft (6) of the turbine (5) and which can pass from a fully retracted configuration in which the shutter element (8) in no way covers the outer periphery (5 ') of the turbine (5), and is substantially completely folded around the cam member (9), the two elements (8 and 9) then being arranged one inside the other, to a fully deployed configuration in which the shutter member (8) covers substantially entirely the outer periphery (5 ') of the turbine (5) and extends in majority cantilevered beyond the cam member (9), the reversible passage of a configuration to the the other progressively and proportionally as a function of the rotational position of the cam element (9) about the axis (AL).
3. Dispositif de pompe selon la revendication 1 ou 2, caractérisé en ce que l'élément de came (9), l'élément obturateur (8) et la turbine (5) avec son arbre (6) sont tous montés sur une même partie (2") du corps de pompe (2), dont fait également partie intégrante le logement de réception (7).  Pump device according to claim 1 or 2, characterized in that the cam element (9), the shutter element (8) and the turbine (5) with its shaft (6) are all mounted on the same part (2 ") of the pump body (2), which also forms part of the receiving housing (7).
4. Dispositif de pompe selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la turbine (5) est montée en porte-à-faux sur une portion d'extrémité libre de l'arbre d'entraînement (6) s' étendant au-delà du logement de réception (7), et en ce que l'élément de came (9) est monté directement autour de ce dernier et à l'arrière de ladite turbine (5) et présente avantageusement une extension radiale au plus sensiblement équivalente à celle de ladite turbine (5).  Pump device according to one of Claims 1 to 3, characterized in that the turbine (5) is cantilevered on a free end portion of the drive shaft (6). extending beyond the receiving housing (7), and in that the cam member (9) is mounted directly thereto and behind said turbine (5) and preferably has a radial extension at most substantially equivalent to that of said turbine (5).
5. Dispositif de pompe selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'élément de came (9) et l'élément obturateur (8), tous deux de forme générale cylindrique creuse, présentent des dimensions sensiblement équivalentes selon leur axe commun, ledit au moins un chemin de guidage (11) ménagé sur la face externe (9") de la paroi (9') de l'élément de came (9) s'étendant dans la direction axiale (AL) dudit élément de came (9), sur la majorité, préférentiellement sur sensiblement la totalité, de la longueur axiale de cet élément (9).  Pump device according to one of Claims 1 to 4, characterized in that the cam element (9) and the shutter element (8) both of generally hollow cylindrical shape have substantially equivalent dimensions. according to their common axis, said at least one guide path (11) formed on the outer face (9 ") of the wall (9 ') of the cam member (9) extending in the axial direction (AL) said cam element (9), on the majority, preferably on substantially all, of the axial length of this element (9).
6. Dispositif de pompe selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'élément obturateur (8) cylindrique creux comporte au moins deux, préférentiellement trois, éléments suiveurs (12), par exemple sous la forme d'ergots, de pions, de doigts ou analogues, saillants vers l'intérieur et répartis de manière homogène sur sa circonférence, le ou chaque chemin de guidage (11) consistant en une gorge ou rainure s'étendant sur une fraction ou sur la totalité d'un tour, voire sur plusieurs tours en cas de chemin unique, sur la face extérieure (9") de la paroi (9') de l'élément de came (9). 6. Pump device according to any one of claims 1 to 5, characterized in that the hollow cylindrical shutter element (8) comprises at least two, preferably three, follower elements (12), for example in the form of pins, pawns, fingers or the like projecting inwards and homogeneously distributed over its circumference, the or each guide path (11) consisting of a groove or groove extending over a fraction or on the all of a turn, or even several turns in case of single path, on the outer face (9 ") of the wall (9 ') of the cam member (9).
7. Dispositif de pompe selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'ensemble formé par l'élément obturateur (8) et l'élément de came (9) est sollicité par un moyen élastique dans un état correspondant à un dégagement total de la périphérie extérieure (5') de la turbine (5) par l'élément obturateur (8), avec le cas échéant également un dégagement total de l'entrée d'alimentation (4) et de la sortie d'évacuation (4') de la chambre de circulation (3), ladite sollicitation élastique étant fournie par un moyen agissant en rotation sur l'élément de came (9) ou en translation sur l'élément obturateur (8) ou intégré à l'actionneur.  7. A pump device according to any one of claims 1 to 6, characterized in that the assembly formed by the shutter member (8) and the cam member (9) is biased by an elastic means in a state corresponding to a total clearance of the outer periphery (5 ') of the turbine (5) by the shutter element (8), with possibly also a total clearance of the supply inlet (4) and the outlet discharge (4 ') of the circulation chamber (3), said resilient bias being provided by means acting in rotation on the cam member (9) or in translation on the shutter member (8) or integrated with the actuator.
8. Dispositif de pompe selon l'une quelconque des revendications 1 à 7 caractérisé en ce qu'en position déployée de recouvrement maximal de la périphérie extérieure (5') de la turbine (5) par l'élément obturateur (8), ce dernier obture également de manière étanche la ou les sortie(s) d'évacuation (4') de la chambre de circulation (3), cette ou ces dernière(s) étant arrangée(s) radialement par rapport à l'axe longitudinal (AL) de rotation de la turbine (5), sur la périphérie extérieure du volume interne toroïdal de la chambre de distribution (3) s 'étendant autour de la turbine (5), l'entrée d'alimentation (4) débouchant dans ladite chambre (3) en face de la turbine (5) dans la direction de l'axe longitudinal (AL).  8. Pump device according to any one of claims 1 to 7 characterized in that in the extended position of maximum overlap of the outer periphery (5 ') of the turbine (5) by the shutter element (8), also closes the outlet outlet (s) (4 ') of the circulation chamber (3), this or these latter (s) being arranged (s) radially with respect to the longitudinal axis ( AL) of rotation of the turbine (5), on the outer periphery of the toroidal internal volume of the distribution chamber (3) extending around the turbine (5), the feed inlet (4) opening into said chamber (3) in front of the turbine (5) in the direction of the longitudinal axis (AL).
9. Dispositif de pompe selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'élément obturateur (8) cylindrique creux comporte, au niveau de son bord périphérique frontal (14), un moyen d'étanchéité (15) apte et destiné à venir en contact avec une portion de paroi opposée d'une partie secondaire (2"') du corps de pompe (2) ou d'un élément (2"') d'un carter moteur formant corps support lorsque l'élément obturateur (8) est en position déployée maximale, avec simultanément un recouvrement total de la périphérie extérieure (5') de la turbine (5), et, le cas échéant, une obturation étanche de la ou des sorties d'évacuation (4') de la chambre de circulation (3).  9. A pump device according to any one of claims 1 to 8, characterized in that the hollow cylindrical shutter element (8) comprises, at its front peripheral edge (14), a sealing means (15). adapted and intended to come into contact with an opposite wall portion of a secondary portion (2 "') of the pump body (2) or a member (2"') of a support body shutter element (8) is in the maximum deployed position, simultaneously with a total overlap of the outer periphery (5 ') of the turbine (5), and, where appropriate, sealing of the exhaust outlet (s) ( 4 ') of the circulation chamber (3).
10. Dispositif de pompe selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il comprend, en outre, au moins un moyen (16, 17, 25) spécifique, rapporté ou intégré, d'assujettissement axial ou linéaire du mouvement de déplacement de l'élément obturateur (8), en plus de son assujettissement translatif résultant de son montage coulissant sur l'élément de came (9), ce par le biais d'une liaison de guidage en translation et de blocage en rotation entre l'élément obturateur (8) et le corps de pompe (2). 10. A pump device according to any one of claims 1 to 9, characterized in that it further comprises at least one means (16, 17, 25) specific, reported or integrated, axial or linear subjection movement of the shutter element (8), in addition to its translational subjection resulting from its mounting sliding on the cam member (9), by means of a translational guiding link and rotational locking between the shutter member (8) and the pump body (2).
11. Dispositif de pompe selon la revendication 10, caractérisé en ce que le moyen d'assujettissement (16) consiste en un flasque annulaire qui est solidarisé rigidement avec le logement de réception (7) recevant l'arbre (6) de la turbine (5), ce par l'intermédiaire d'un prolongement tabulaire interne (16') formant également palier de guidage en rotation pour l'élément de came (9), et qui comporte sur sa périphérie extérieure des formations radiales (18) saillantes et/ou enfoncées coopérant avec des sites complémentaires (19) ménagés sur la face interne (8") de la paroi cylindrique (8') de l'élément obturateur (8), en ce que lesdits sites saillants et/ou enfoncés (19) présentent une structure allongée et profilée dans la direction axiale (AL) de l'élément obturateur cylindrique (8) et en ce que lesdites formations (18) coulissent le long desdits sites (19) lors du déplacement en translation de l'élément obturateur (8) sous l'effet de la rotation de l'élément de came (9), ce flasque (16) assurant ainsi un blocage en rotation et un guidage en translation dudit élément obturateur (8).  11. A pump device according to claim 10, characterized in that the securing means (16) consists of an annular flange which is rigidly secured to the receiving housing (7) receiving the shaft (6) of the turbine ( 5), via an internal tubular extension (16 ') also forming a rotational guide bearing for the cam element (9), and which has protruding radial formations (18) on its outer periphery and / or recessed cooperating with complementary sites (19) formed on the inner face (8 ") of the cylindrical wall (8 ') of the shutter element (8), in that said projecting and / or recessed sites (19) have an elongated and profiled structure in the axial direction (AL) of the cylindrical shutter element (8) and in that said formations (18) slide along said sites (19) during the translational movement of the shutter element ( 8) under the effect of the rotation of the element cam (9), this flange (16) thus providing rotational locking and translational guidance of said shutter member (8).
12. Dispositif de pompe selon la revendication 11, caractérisé en ce que le flasque annulaire (16) comporte, sur sa périphérie extérieure, un joint (20) pour réaliser une étanchéité avec la face interne (8") de la paroi cylindrique (8') de l'élément obturateur (8) et en ce que le prolongement tubulaire (16') d'un seul tenant dudit flasque (16) comporte un insert métallique interne (16") de forme annulaire, sur lequel il est surmoulé.  Pump device according to Claim 11, characterized in that the annular flange (16) has, on its outer circumference, a seal (20) for sealing with the internal face (8 ") of the cylindrical wall (8). ') of the shutter element (8) and in that the tubular extension (16') of one piece of said flange (16) comprises an annular internal metal insert (16 ") on which it is overmolded.
13. Dispositif de pompe selon la revendication 10, caractérisé en ce que les moyens d'assujettissement (17) consistent en des chemins de guidage, saillants et/ou rentrants, formés ou rapportés dans une partie de paroi (2') du corps de pompe (2) entourant l'élément obturateur (8), s' étendant parallèlement à la direction de l'axe longitudinal (AL) de l'arbre (6) de la turbine (5) et avec lesquels viennent en engagement, avec faculté de coulissement, des formations saillantes et/ou rentrantes (17') présentes sur la face externe (8"') de la paroi cylindrique (8') de l'élément obturateur (8).  Pump device according to claim 10, characterized in that the securing means (17) consist of guideways, projecting and / or re-entrant, formed or reported in a wall portion (2 ') of the housing body. pump (2) surrounding the shutter element (8), extending parallel to the direction of the longitudinal axis (AL) of the shaft (6) of the turbine (5) and with which come into engagement, with faculty sliding, protruding formations and / or reentrant (17 ') present on the outer face (8 "') of the cylindrical wall (8 ') of the shutter member (8).
14. Dispositif de pompe selon la revendication 13, caractérisé en ce que les chemins de guidage (17) consistent en des rainures rectilignes parallèles à l'axe (AL) de l'arbre (6) de la turbine (5) et formées chacune sur la face interne de la partie de paroi (2') du corps de pompe (2) et en ce que les formations externes (17') de l'élément obturateur (8) consistent en des nervures adaptées pour être reçues dans les rainures (17) du corps de pompe (2). Pump device according to Claim 13, characterized in that the guide paths (17) consist of straight grooves parallel to the axis (AL) of the shaft (6) of the turbine (5) and each formed on the inner face of the wall portion (2 ') of the pump body (2) and in that the external formations (17') of the shutter element (8) consist of ribs adapted to be received in the grooves (17) of the pump body (2).
15. Dispositif de pompe selon la revendication 13 ou 14, caractérisé en ce que les chemins de guidage (17) sont formés sur ou dans une pièce d' insert (21) rapportée par emboîtement dans le corps de pompe (2), autour du logement de réception (7) de l'arbre (6) de la turbine (5) et contre ou dans une partie de paroi (2') du corps de pompe (2) entourant l'élément obturateur (8).  Pump device according to claim 13 or 14, characterized in that the guide tracks (17) are formed on or in an insert part (21) inserted into the pump body (2) around the receiving housing (7) of the shaft (6) of the turbine (5) and against or in a wall portion (2 ') of the pump body (2) surrounding the shutter element (8).
16. Dispositif de pompe selon la revendication 10, caractérisé en ce qu'une pièce d'insert annulaire (25) à section en U est montée par emboîtement dans le corps de pompe (2), autour de la paroi cylindrique du logement de réception (7) de l'arbre (6) de la turbine (5) et contre une partie de paroi (2') du corps de pompe (2), en ce que les éléments obturateur (8) et de came (9) mutuellement coopérants sont arrangés dans ladite pièce d'insert (25), et en ce que la paroi interne cylindrique (25') de ladite pièce d'insert (25) formant surface de support et de guidage en rotation pour l'élément de came (9) et la paroi externe cylindrique (25") comporte des moyens d'assujettissement (17) sous forme de chemins de guidage, saillants ou rentrants, formés dans ladite paroi (25"), s'étendant parallèlement à la direction de l'axe longitudinal (AL) de l'arbre (6) de la turbine (5) et avec lesquels viennent en engagement, avec faculté de coulissement, des formations saillantes et/ou rentrantes (17') présentes sur la face externe (8" ') de la paroi cylindrique (8') de l'élément obturateur (8).  Pump device according to claim 10, characterized in that a U-shaped annular insert piece (25) is fitted to the pump body (2), nesting around the cylindrical wall of the receiving housing. (7) of the shaft (6) of the turbine (5) and against a wall portion (2 ') of the pump body (2), in that the shutter (8) and cam (9) mutually cooperating members are arranged in said insert piece (25), and in that the cylindrical inner wall (25 ') of said insert piece (25) forming a support and rotational guiding surface for the cam member ( 9) and the cylindrical outer wall (25 ") comprises fastening means (17) in the form of guideways, projecting or recessing, formed in said wall (25"), extending parallel to the direction of the longitudinal axis (AL) of the shaft (6) of the turbine (5) and with which are engaged, with the ability to slide, protruding formations and / or reentrant (17 ') present on the outer face (8 "') of the cylindrical wall (8 ') of the shutter member (8).
17. Dispositif de pompe selon la revendication 16, caractérisé en ce que le volume interne de la pièce d'insert annulaire (25) à section en U est fermé par un flasque annulaire formant couvercle (26) venant en appui étanche contre la face interne de la paroi cylindrique de l'élément obturateur (8), ladite pièce d'insert (25) avec l'élément obturateur (8), l'élément de came (9) et le flasque annulaire (26) constituant le cas échéant un sous-ensemble pré-assemblé avant montage dans le corps de pompe (2).  Pump device according to Claim 16, characterized in that the internal volume of the U-shaped annular insert piece (25) is closed by an annular cover flange (26) which bears tightly against the inner face. of the cylindrical wall of the shutter element (8), said insert member (25) with the shutter element (8), the cam element (9) and the annular flange (26) constituting, if appropriate, a subassembly pre-assembled before mounting in the pump casing (2).
18. Dispositif de pompe selon l'une quelconque des revendications 1 à 17, caractérisé en ce qu'il comprend un capteur de position détectant la position en translation de l'élément obturateur (8), par exemple un capteur magnétique apte à relever la position d'un marqueur ferromagnétique intégré dans l'élément obturateur (8) ou un capteur de positionnement angulaire de l'arbre de sortie de Γ actionneur, intégré à Γ actionneur (10). 18. A pump device according to any one of claims 1 to 17, characterized in that it comprises a position sensor detecting the position in translation of the shutter member (8), for example a magnetic sensor capable of raising the position of a ferromagnetic marker integrated in the shutter element (8) or a sensor of angular positioning of the output shaft of the actuator, integrated with the actuator (10).
19. Dispositif de pompe selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'élément obturateur (8) comporte au moins une découpe ou un passage (27) dans sa paroi cylindrique (8').  19. Pump device according to any one of claims 1 to 8, characterized in that the shutter member (8) has at least one cutout or a passage (27) in its cylindrical wall (8 ').
20. Véhicule, notamment, automobile, comprenant au moins un circuit de circulation d'un fluide liquide, tel que par exemple un circuit de liquide de refroidissement, caractérisé en ce que ledit circuit comprend au moins un dispositif de pompe (1) selon l'une quelconque des revendications 1 à 19.  Vehicle, in particular an automobile, comprising at least one circulation circuit of a liquid fluid, such as, for example, a cooling liquid circuit, characterized in that said circuit comprises at least one pump device (1) according to the invention. any one of claims 1 to 19.
21. Véhicule selon la revendication 20, caractérisé en ce que le circuit comprend au moins un moyen de mesure de la température du fluide liquide en circulation, dont le signal de mesure est exploité pour commander Γ actionneur (10) entraînant l'élément de came (9) du dispositif de pompe (1).  21. Vehicle according to claim 20, characterized in that the circuit comprises at least one means for measuring the temperature of the circulating liquid fluid, whose measurement signal is used to control the actuator (10) driving the cam element. (9) of the pump device (1).
EP18785697.6A 2017-09-18 2018-09-13 Variable-delivery pump device and circuit including such a pump Active EP3685046B1 (en)

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FR1758627A FR3071278B1 (en) 2017-09-18 2017-09-18 VARIABLE FLOW PUMP DEVICE AND CIRCUIT COMPRISING SUCH A PUMP
PCT/FR2018/052241 WO2019053377A1 (en) 2017-09-18 2018-09-13 Variable-delivery pump device and circuit including such a pump

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CN111417785A (en) 2020-07-14
FR3071278A1 (en) 2019-03-22
EP3685046B1 (en) 2021-09-01
WO2019053377A1 (en) 2019-03-21
US11168694B2 (en) 2021-11-09
US20210148367A1 (en) 2021-05-20
FR3071278B1 (en) 2020-02-21

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