EP3390839B1 - Laufrad für ein motorgetriebenes gebläse eines motorkühlsystems eines fahrzeugs - Google Patents

Laufrad für ein motorgetriebenes gebläse eines motorkühlsystems eines fahrzeugs Download PDF

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Publication number
EP3390839B1
EP3390839B1 EP16825473.8A EP16825473A EP3390839B1 EP 3390839 B1 EP3390839 B1 EP 3390839B1 EP 16825473 A EP16825473 A EP 16825473A EP 3390839 B1 EP3390839 B1 EP 3390839B1
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EP
European Patent Office
Prior art keywords
impeller
hub
blades
rotation
blade
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Active
Application number
EP16825473.8A
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English (en)
French (fr)
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EP3390839A2 (de
Inventor
Gilles DURIEUX
Hubert GILLA
Dominique Lecroq
Serghei Soltoian
Stephane LEYENDECKER
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.)
Renault SAS
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Renault SAS
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Publication date
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Publication of EP3390839A2 publication Critical patent/EP3390839A2/de
Application granted granted Critical
Publication of EP3390839B1 publication Critical patent/EP3390839B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
    • 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
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/06—Controlling of coolant flow the coolant being cooling-air by varying blade pitch

Definitions

  • the invention relates to the field of cooling devices for motor vehicles, in particular intended for cooling an internal combustion engine.
  • the invention relates more particularly to a propeller for a motor-fan unit of a vehicle engine cooling system.
  • the invention also relates to a motor-fan unit equipped with such a propeller as well as a vehicle equipped with such a motor-fan unit.
  • motor vehicles include a cooling device making it possible to perform heat exchange between a coolant liquid and air. This is the reason why many vehicles are equipped with at least one heat exchanger on the front face so that the movement of the vehicle generates a relative movement of the air through the heat exchanger. When this relative movement of the air is insufficient, it is known to use the assistance of a motor-fan unit.
  • the latter consists of a fixed volute on which a propeller is rotated by an electric motor.
  • the object of the invention is to remedy all of the aforementioned drawbacks and has for object a propeller for a motorized fan unit according to claim 1 comprising a ferrule delimiting an air flow passage through which extend blades, the propeller comprising a central hub capable of being rotatably linked to a shaft of a drive motor, each blade extending radially from the hub via their inner end, each blade comprising a leading edge and a trailing edge.
  • the propeller which is the subject of the invention is all the more remarkable since it comprises means for angular displacement of the blades relative to the hub such that the pitch of the blades is able to vary between at least one opening configuration according to in which the leading and trailing edges of two adjacent blades are mutually spaced from each other and a closure configuration of the air passage of the ferrule according to which these same edges are brought together so that the blades form a wall for closing the air passage.
  • the propeller of the invention is intended to improve the efficiency of a vehicle, to limit the premature wear of certain parts usually set in rotation, while making it possible to generate, if necessary, a forced air flow.
  • the blades of the propeller are able to pivot between a configuration of free circulation of air and a configuration of interruption of the flow of air flow, and vice versa.
  • Air circulation through the propeller usually results in a rotation of the electric motor, and therefore premature wear of the latter when the need for forced air flow is not required.
  • the propeller is frozen in rotation.
  • the variable-pitch propeller of the invention the latter is able to form a shutter screen extending in line with a heat exchanger, which tends to prevent its rotation, which improves the longevity of operation. of the motor. This allows furthermore, to improve the efficiency of the vehicle, in particular with regard to its coefficient of penetration into the air, which is then reduced when the propeller is in its configuration for closing the air passage.
  • the propeller may comprise two half-shells, each half-shell comprising a receiving means forming, for each blade, a transverse rotation bearing of a rotation shaft extending projecting out of a inner end of the blade.
  • said support can be a slide guide along which the movable disc is able to slide under the effect of a tensile force generated by the electromagnet.
  • a half-shell can be linked to the shell by connecting arms, and can be shaped so as to cooperate by formally complementary with the support of said means for angular displacement of the blades.
  • the propeller may include at least one return spring exerting a force opposing the tensile force of the electromagnet.
  • an outer end of each blade can be mounted for rotation on the shroud of the propeller.
  • the movable disc may comprise an interface for fixing a magnet such that the movable disc is disposed inside the hub and that the magnet of the electromagnet is disposed outside. of the hub.
  • the invention also relates to a motor-fan unit comprising a propeller linked to rotation of a shaft of a drive motor, the propeller conforming to any one of the aforementioned characteristics.
  • the motor-fan unit may include an electromagnet, a coil of which may be integral with a housing of the drive motor.
  • the invention also aims to protect a vehicle, in particular of the type of an automobile, comprising an aforementioned motor-fan unit.
  • the motor-fan unit 1 more particularly the propeller 3 on board this motor-fan unit, proposes a system making it possible to improve the efficiency of the vehicle in the air, by reducing the coefficient of penetration into the air. vehicle air.
  • the propeller 3 of the motor-fan unit 1 which is capable of creating a forced air flow intended to pass through at least one heat exchanger of a cooling device, is remarkable in that it comprises blades 6 which are mounted to rotate relative to a central hub 5 of the propeller.
  • Such a design advantageously makes it possible to position the propeller 3 in different configurations ranging from an opening configuration in which the propeller is able to cause air circulation when it is rotated, to a closed configuration in which the propeller is a partition which blocks the flow of air which improves the performance of the vehicle.
  • the hub 5 on which the various blades 6 of the propeller are mounted comprises a bowl suitable for being wedged on a motor shaft 4 in order to be driven in rotation in a given direction of rotation.
  • the motor 4 is an electric motor which is connected to a control unit. Control of its power can be achieved by a frequency modulation device.
  • Each blade 6 has a profile delimited by an inner line of curved shape and an outer line of curved shape and shaped such that these two lines meet at a leading edge 62 and a trailing edge 63.
  • a blade 6 is also defined by an inner end 61 and an outer end 64.
  • the inner end 61 is connected to the hub 5 of the propeller.
  • the propeller comprises a ferrule 2 delimiting an outer ring of the propeller, the effect of which is to reduce the noise pollution generated by the displacement of the blades 6.
  • Such an outer ring of the propeller 3 is intended to cooperate by cooperation and complementarity. shaped with an opening in a air intake volute in order to improve the air flow by reducing turbulence when the propeller 3 is rotated by the motor 4.
  • each blade 6 is then mounted to rotate on the ferrule 2.
  • the ferrule 2 comprises housings, one per blade, in each of which is disposed an axis of rotation of one of the blades 6.
  • the housing is preferably of the type of a hole passing right through the outer ring formed by the ferrule 2.
  • Each blade 6 comprises a rotation shaft projecting out of its outer end 64.
  • the ferrule 2 is preferably connected to a hub 5 of the propeller by connecting arms 21 visible to the figures 3 to 5 .
  • the engine 4 is shown schematically on the figure 4 , according to an arrangement downstream of the propeller 3 with respect to the direction of flow of the air which is marked by the arrows F.
  • the arrangement of the motor 4 with respect to the propeller may be different, that is to say that is to say that it can be placed upstream of the latter without thereby departing from the scope of the invention.
  • the motor 4 comprises a rotor connected in rotation to the hub 5 by a drive shaft, not shown, extending along the axis 8 of rotation.
  • the propeller 3 of the invention is remarkable in that these blades 6 are movable in rotation relative to the hub 5, around an axis 11 of rotation extending radially outside the hub 5.
  • the propeller 3 is in a traditional configuration of free circulation of air between its blades.
  • the pitch of the propeller 3 allows it to generate a forced air flow when, in this configuration of the opening of the blades, the drive motor 4 causes the rotation of the propeller 3.
  • the leading edges 62 and trailing edge 63 extend in transverse parallel planes spaced in X. The distance between the leading edge 61 of one blade 6 and the trailing edge 63 of another blade 6 which is directly adjacent thereto, allows air flow through the propeller 3.
  • the propeller 3 is in a configuration for closing the air passage delimited by the ferrule. In this configuration, the air flow is interrupted.
  • the blades 6 are shown in a pivoted state at an angle preferably between 5 and 20 ° around the axes 11 of rotation passing through the hub 5.
  • the leading edges 62 and trailing 63 of the blades 6 can thus s 'extend substantially in the same and unique transverse plane of axis YZ.
  • the propeller 3 then has an almost zero pitch so that its rotation cannot generate a sufficient air flow to achieve a heat exchange between the air and a fluid of the heat transfer fluid type for example, circulating in a heat exchanger.
  • Such a configuration of the blades 6 gives the propeller 3 a shutter function intended to block any air circulation through the passage of the propeller, whether natural when the vehicle is in motion or forced when the engine. propeller drive 3 is in operating mode.
  • said means 7 for angular displacement of the blades relative to the hub will be described in detail so that the latter can move between extreme open and closed positions and at least one intermediate position of quasi-closing in which a airflow of reduced quantity can circulate between the blades 6.
  • Each blade 6 comprises a rotation shaft 65 projecting out of its inner end 61.
  • the rotation shaft 65 pivots about an axis of rotation coincident with the axis of rotation of the outer end 64 on the shaft.
  • the rotation shaft 65 comprises at its free end an eccentric 66.
  • the angular displacement device 7 comprises a disc 72 movable in translation disposed inside the bowl forming the hub 5.
  • the movable disc 72 is provided with housings 54 for receiving the eccentrics 66.
  • Each housing 54 for receiving may be of the type d. 'an oblong slot of axis Z.
  • the very design of the housings 54 is subject to that of the eccentrics 66 in such a way for the latter to slide along the Z axis when the angular displacement device 7 is made movable in X axis translation.
  • the angular displacement device 7 comprises means for displacing the disc 72 movable along the axis 8 of rotation.
  • Such means for moving the disc 72 comprises an electromagnet 9 consisting of a magnet 91 secured to the movable disc 72 and of a coil 92 which can be secured to a casing of the drive motor 4.
  • the magnet 91 may be a magnetized disc as shown partially in the figures 3 to 5 .
  • the coil 92 can be arranged on a structural element of a support frame on which the motor-fan unit is arranged.
  • the coil 92 can be part of the winding of the motor 4 such that the angular displacement of the blades 6 from the closed configuration to the open configuration takes place at the same time as the propeller 3 is rotated.
  • the movable disc 72 can be made by molding a plastic material.
  • the use of plastic allows the connection of the movable disc 72 to the magnet 91 by overmolding such that the movable disc 72 is integral in translation with the magnet 91.
  • Said means for angular displacement 7 of the blades 6 comprises a support 71 assembled in a reversible manner to the hub 5, preferably by screwing.
  • the hub 5 consists of at least two half-shells 51 and 52 assembled together in opposition from the front in order to define a chamber inside which at least the movable disc 72 is arranged.
  • One of the half-shells 51 comprises the connecting arms 21 to the shell 2.
  • the other of the half-shells 52 also of the type of a bowl comprises, at its bottom wall, an opening substantially of cylindrical shape which is closed by the support 71 of said angular displacement means 7.
  • the hub 5 comprises a receiving means 53 forming, for each blade 6, a transverse bearing intended for the rotation of a rotation shaft 65 of the blade extending protruding out of its inner end 61.
  • the edges outer peripheral devices of the two half-shells 51 and 52 comprise notches forming said receiving means 53.
  • Each notch has substantially a section in the form of a semi-circular arc.
  • the notches are in pairs arranged opposite each other so that the assembly of the two half-shells by their outer peripheral edge makes it possible to produce tubes forming bearings on which the rotation shafts 65 of the blades are able to pivot.
  • the means 7 for angular displacement of the blades comprises a device for guiding in translation the disc 72 movable on the support 71.
  • a guide device is made in the form of a ramp of tubular section extending projecting out of a inner face of the support 71 on which is slidably mounted a guided wall of substantially complementary shape which is provided on the movable disc 72.
  • the return spring 10 is arranged around the ramp of the support 71 and the guided wall of the disc 72.
  • said angular displacement means 7 comprises, by means of abutting the disc 72 on the support 71.
  • the stops are subject to the profile of the blades such that in the opening configuration of the air passage, the relative position of the blades 6 on the hub 5 is limited.
  • such an abutment means is produced by ribs arranged on the disc 72 and the support 71.
  • Such ribs also make it possible to increase the rigidity of the disc 72 and of the support 71 at the bottom. deformation.
  • the stops have a circular profile such that they extend coaxially with said device for guiding the disc 72 on the support 71, mentioned above.
  • the radial gap between the aforementioned guide device and said abutment means delimits housings of annular section, respectively arranged on the movable disc 72 and the support 71, each housing receiving one end of the return spring 10.
  • the blades 6 of the propeller 3 of the invention are in the configuration for closing the air passage.
  • the spring 10 exerts on the movable disc 72 a thrust force which moves the disc 72 away from the support 71 so that the magnet 91 is in abutment against an external face of the support 71.
  • the control unit circulates a current in the coil 92 so that the magnetic field thus created by the current in the coil tends to bring the disc 72 closer to the coil. support 71.
  • the return spring 10 is compressed.
  • the bringing together of the movable disc 72 of the support 71 causes a displacement of the housings 54 for receiving the eccentrics 66, according to a translational movement along the axis 8 of rotation.
  • the eccentric 66 causes the rotation shafts 65 of the blades 6 to rotate on said receiving means 53 of the hub 5.
  • the current can be of variable intensity so that it generates a tensile force of variable intensity.
  • the gap between the leading edges 62 and of leaks 63 of adjacent blades 6 is variable between a minimum gap associated with the closed configuration of the air passage and a maximum gap associated with the total opening configuration of the passage d. 'air.
  • the relative position of the blades 6 on the hub 5 can thus vary between at least one opening configuration and the closed configuration of the air passage which is partially delimited by the volute 2.
  • the relative position of the blades 6 on the hub 5 is dependent on the tensile force generated by the electromagnet 9 so that depending on the intensity of the current flowing in the coil, the blades 6 can be moved in a configuration of opening among several.
  • the motor-fan unit 1 equipped with the propeller 3 is remarkable in that it allows improved management of the air flow through the exchanger thermal, while increasing the efficiency of the vehicle.
  • the propeller 3 with variable pitch between an open configuration and a closed configuration of the air passage of the volute 1 allows an optimized management of the air flow, both when the propeller is stopped and forced rotation of propeller 3 by motor 4 of motor-fan unit 1.
  • the propeller 3 is a constituent element of a motor vehicle fan unit, in the sense that it allows the forced flow of air through a heat exchange device.
  • the invention therefore relates to a vehicle equipped with such a motor-fan unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (10)

  1. Laufrad (3) für eine Gebläseeinheit (1), welches einen Lüfterring (2) aufweist, der einen Luftströmungsdurchlass begrenzt, durch den hindurch sich Schaufeln (6) erstrecken, wobei das Laufrad (3) eine Nabe (5) aufweist, die geeignet ist, mit einer Welle eines Antriebsmotors (4) drehfest verbunden zu werden, wobei sich jede Schaufel (6) an ihrem inneren Ende (61) von der Nabe (5) aus radial erstreckt, wobei jede Schaufel eine Vorderkante (62) und eine Hinterkante (63) aufweist, wobei das Laufrad ein Mittel zur Winkelverstellung (7) der Schaufeln in Bezug auf die Nabe aufweist, derart, dass der Anstellwinkel der Schaufeln variieren kann zwischen wenigstens einer Öffnungskonfiguration, in welcher die Vorder- und die Hinterkanten (62, 63) von zwei benachbarten Schaufeln voneinander beabstandet sind, und einer Schließkonfiguration des Luftdurchlasses des Lüfterringes, in welcher diese Kanten einander genähert sind, so dass die Schaufeln eine Verschlusswand für den Luftdurchlass bilden,
    dadurch gekennzeichnet, dass das Mittel zur Winkelverstellung (7) der Schaufeln (6) einen Träger (71), der mit der Nabe (5) drehfest verbunden ist, eine Scheibe (72), die entlang der Drehachse (8) der Nabe translatorisch beweglich ist, und einen Elektromagneten (9), der eine optimierte Regelung der Luftströmung sowohl beim Stillstand des Laufrades als auch bei der durch den Motor (4) erzwungenen Drehung des Laufrades ermöglicht, umfasst.
  2. Laufrad (3) nach Anspruch 1, dadurch gekennzeichnet, dass die Nabe (5) zwei Halbschalen (51, 52) aufweist, wobei jede Halbschale ein Aufnahmemittel (53) umfasst, das für jede Schaufel (6) ein Querlager für die Rotation einer Drehwelle (65) bildet, die sich aus einem inneren Ende (61) der Schaufel (6) hinaus vorstehend erstreckt.
  3. Laufrad (3) nach Anspruch 2, dadurch gekennzeichnet, dass die bewegliche Scheibe (72) für jede Schaufel (6) einen Sitz zur Aufnahme (54) eines Exzenters (66) umfasst, der sich aus der Drehwelle (65) jeder Schaufel (6) auf der Nabe (5) hinaus vorstehend erstreckt.
  4. Laufrad (3) nach Anspruch 3, dadurch gekennzeichnet, dass der Träger (71) eine Gleitführung ist, entlang welcher die bewegliche Scheibe (72) unter der Wirkung einer von dem Elektromagneten (9) erzeugten Zugkraft zu gleiten in der Lage ist.
  5. Laufrad (3) nach Anspruch 4, dadurch gekennzeichnet, dass eine Halbschale (52) durch Verbindungsarme (21) mit dem Lüfterring (2) verbunden ist und dafür ausgebildet ist, durch Formschluss mit dem Träger (71) des Mittels zur Winkelverstellung (7) der Schaufeln (6) zusammenzuwirken.
  6. Laufrad (3) nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, dass es wenigstens eine Rückholfeder (10) umfasst, die eine Kraft ausübt, die der Zugkraft des Elektromagneten (9) entgegenwirkt.
  7. Laufrad (3) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein äußeres Ende (64) jeder Schaufel (6) drehbar am Lüfterring (2) des Laufrades gelagert ist.
  8. Laufrad (3) nach Anspruch 1 in Kombination mit einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass die bewegliche Scheibe (72) eine Schnittstelle zur Befestigung (73) eines Magneten (91) umfasst, so dass die bewegliche Scheibe (72) im Inneren der Nabe (5) angeordnet ist und der Magnet (91) des Elektromagneten (9) außerhalb der Nabe angeordnet ist.
  9. Gebläseeinheit (1), welche ein Laufrad (3) umfasst, das mit einer Welle eines Antriebsmotors (4) drehfest verbunden ist, dadurch gekennzeichnet, dass das Laufrad (3) einem der Ansprüche 1 bis 8 genügt.
  10. Fahrzeug, insbesondere vom Typ eines Kraftfahrzeugs, welches eine Gebläseeinheit (1) nach Anspruch 9 aufweist.
EP16825473.8A 2015-12-18 2016-12-09 Laufrad für ein motorgetriebenes gebläse eines motorkühlsystems eines fahrzeugs Active EP3390839B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1562806A FR3045740B1 (fr) 2015-12-18 2015-12-18 Helice pour un groupe moto-ventilateur d'un systeme de refroidissement d'un moteur de vehicule
PCT/FR2016/053311 WO2017103395A2 (fr) 2015-12-18 2016-12-09 Hélice pour un groupe moto-ventilateur d'un système de refroidissement d'un moteur de véhicule

Publications (2)

Publication Number Publication Date
EP3390839A2 EP3390839A2 (de) 2018-10-24
EP3390839B1 true EP3390839B1 (de) 2021-02-03

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EP16825473.8A Active EP3390839B1 (de) 2015-12-18 2016-12-09 Laufrad für ein motorgetriebenes gebläse eines motorkühlsystems eines fahrzeugs

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EP (1) EP3390839B1 (de)
FR (1) FR3045740B1 (de)
WO (1) WO2017103395A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3077339A1 (fr) * 2018-01-31 2019-08-02 Valeo Systemes Thermiques Ventilateur pour vehicule automobile
CN110701072A (zh) * 2019-11-04 2020-01-17 徐州雅居乐环保科技有限公司 一种轴流风机的风量调节装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013064337A (ja) * 2011-09-15 2013-04-11 Hitachi Constr Mach Co Ltd 送風装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2383002A (en) * 1943-05-03 1945-08-21 John Spargo Impeller and governor for same
US2673681A (en) * 1950-06-07 1954-03-30 John Spargo Combined fluid impeller and self-sealing closure
US3265047A (en) * 1963-05-16 1966-08-09 Dowty Hydraulic Units Ltd Cooling fans
US3874347A (en) * 1973-05-01 1975-04-01 Gordon Elmer Hovey Shutter-fan system
JP5426895B2 (ja) * 2009-02-12 2014-02-26 富士重工業株式会社 車両用ラジエータユニット

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013064337A (ja) * 2011-09-15 2013-04-11 Hitachi Constr Mach Co Ltd 送風装置

Also Published As

Publication number Publication date
FR3045740A1 (fr) 2017-06-23
WO2017103395A3 (fr) 2017-10-19
WO2017103395A2 (fr) 2017-06-22
FR3045740B1 (fr) 2019-09-20
EP3390839A2 (de) 2018-10-24

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