EP3390839B1 - Impeller for a motor-driven fan unit of a vehilcle engine cooling system - Google Patents
Impeller for a motor-driven fan unit of a vehilcle engine cooling system Download PDFInfo
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- hub
- blades
- rotation
- blade
- 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.)
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Links
- 238000001816 cooling Methods 0.000 title description 10
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 230000000694 effects Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 241000940835 Pales Species 0.000 description 3
- 206010033546 Pallor Diseases 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- 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
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- 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)
Description
L'invention se rapporte au domaine des dispositifs de refroidissement pour véhicules automobiles, notamment destinés au refroidissement d'un moteur à combustion interne.The invention relates to the field of cooling devices for motor vehicles, in particular intended for cooling an internal combustion engine.
L'invention concerne plus particulièrement une hélice pour un groupe moto-ventilateur d'un système de refroidissement d'un moteur de véhicule.The invention relates more particularly to a propeller for a motor-fan unit of a vehicle engine cooling system.
L'invention concerne aussi un groupe moto-ventilateur équipé d'une telle hélice ainsi qu'un véhicule équipé d'un tel groupe moto-ventilateur.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.
Classiquement, les véhicules automobiles comportent un dispositif de refroidissement permettant de réaliser un échange thermique entre un liquide caloporteur et de l'air. C'est la raison pour laquelle de nombreux véhicules sont équipés d'au moins un échangeur de chaleur en face avant de telle sorte que le déplacement du véhicule engendre un mouvement relatif de l'air au travers de l'échangeur de chaleur. Lorsque ce mouvement relatif de l'air est insuffisant, il est connu d'utiliser l'assistance d'un groupe moto-ventilateur. Ce dernier se compose d'une volute fixe sur laquelle une hélice est mise en rotation par un moteur électrique.Conventionally, 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.
Afin d'améliorer le coefficient de pénétration dans l'air du véhicule équipé d'un tel échangeur de chaleur, il est connu d'agencer de préférence à l'avant du faisceau de l'échangeur de chaleur, un dispositif d'obturation piloté entre une position de fermeture du faisceau et une position d'ouverture permettant à l'air de circuler au travers de l'échangeur de chaleur.In order to improve the coefficient of penetration into the air of the vehicle equipped with such a heat exchanger, it is known practice to arrange preferably at the front of the bundle of the heat exchanger, a controlled shutter device. between a closed position of the bundle and an open position allowing air to circulate through the heat exchanger.
L'un des inconvénients de l'ajout d'un cadre à lames articulées réside dans son encombrement qui l'exclue de certaines catégories de véhicule.One of the drawbacks of adding a frame with articulated blades lies in its bulk, which excludes it from certain categories of vehicle.
Un autre inconvénient réside dans le fait qu'en l'état passif du groupe moto-ventilateur, l'air de refroidissement circulant au travers de l'hélice tend à provoquer sa rotation, ce qui engendre une usure prématurée des pièces d'usure du moteur, notamment de ses balais. Les hélices pour un groupe moto-ventilateur selon l'art antérieur sont connues de
L'invention a pour but de remédier à l'ensemble des inconvénients précités et a pour objet une hélice pour un groupe moto-ventilateur selon la revendication 1 comportant une virole délimitant un passage d'écoulement d'air au travers de laquelle s'étendent des pales, l'hélice comportant un moyeu central apte à être liée à rotation à un arbre d'un moteur d'entraînement, chaque pale s'étendant radialement du moyeu par leur extrémité intérieure, chaque pale comportant un bord d'attaque et un bord de fuite.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
L'hélice objet de l'invention est d'autant plus remarquable qu'elle comprend un moyen de déplacement angulaire des pales par rapport au moyeu de telle sorte que le pas des pales est apte à varier entre au moins une configuration d'ouverture selon laquelle les bords d'attaque et de fuite de deux pales adjacentes sont mutuellement écartés l'un de l'autre et une configuration de fermeture du passage d'air de la virole selon laquelle ces mêmes bords sont rapprochés de telle sorte que les pales forment une paroi d'obturation du passage d'air.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.
L'hélice de l'invention est destinée à améliorer le rendement d'un véhicule, de limiter l'usure prématurée de certaines pièces habituellement mise en rotation, tout en permettant de générer au besoin un flux d'air forcé.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.
Grâce à l'hélice de l'invention, les pales de l'hélice sont aptes à pivoter entre une configuration de libre circulation de l'air et une configuration d'interruption de l'écoulement du flux d'air, et vice et versa. La circulation de l'air au travers de l'hélice se traduit habituellement par une rotation du moteur électrique, donc une usure prématurée de ce dernier lorsque le besoin en flux d'air forcé n'est pas demandé. A contrario, dans sa configuration d'interruption d'un tel écoulement du flux d'air, l'hélice est figée en rotation. Avec l'hélice à pas variable de l'invention, cette dernière est apte à former un écran d'obturation s'étendant au droit d'un échangeur thermique, ce qui tend à en interdire sa rotation, ce qui améliore la longévité de fonctionnement du moteur. Cela permet en outre d'améliorer le rendement du véhicule, notamment au regard de son coefficient de pénétration dans l'air, qui s'en trouve alors réduit lorsque l'hélice est dans sa configuration de fermeture du passage d'air.Thanks to the propeller of the invention, 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. Conversely, in its configuration for interrupting such a flow of the air flow, the propeller is frozen in rotation. With 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.
Selon l'invention, ledit moyen de déplacement angulaire des pales comprend un support lié à rotation au moyeu, un disque mobile en translation le long de l'axe de rotation du moyeu, et un électro-aimant.According to the invention, said means for angular displacement of the blades comprises a support connected in rotation to the hub, a disc movable in translation along the axis of rotation of the hub, and an electromagnet.
Selon l'invention, l'hélice peut comprendre deux demi-coquilles, chaque demi-coquille comprenant un moyen de réception formant, pour chaque pale, un palier transversal de rotation d'un arbre de rotation s'étendant en saillie hors d'une extrémité intérieure de la pale.According to the invention, 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.
Selon l'invention, le disque mobile du moyen de déplacement angulaire peut comprendre pour chaque pale, un logement de réception d'un excentrique s'étendant en saillie hors de l'arbre de rotation de chaque pale sur le moyeu.According to the invention, the movable disc of the angular displacement means may comprise, for each blade, a housing for receiving an eccentric projecting out of the rotation shaft of each blade on the hub.
Selon l'invention, ledit support peut être un guide coulisse le long duquel le disque mobile est apte à coulisser sous l'effet d'une force de traction générée par l'électroaimant.According to the invention, 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.
Selon l'invention, une demi-coquille peut être liée à la virole par des bras de liaison, et peut être conformée afin de coopérer par complémentarité de forme avec le support dudit moyen de déplacement angulaire des pales.According to the invention, 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.
Selon l'invention, l'hélice peut comprendre au moins un ressort de rappel exerçant un effort s'opposant à la force de traction de l'électroaimant.According to the invention, the propeller may include at least one return spring exerting a force opposing the tensile force of the electromagnet.
Selon l'invention, une extrémité extérieure de chaque pale peut être montée à rotation sur la virole de l'hélice.According to the invention, an outer end of each blade can be mounted for rotation on the shroud of the propeller.
Selon l'invention, le disque mobile peut comprendre une interface de fixation d'un aimant de telle sorte que le disque mobile est disposé à l'intérieur du moyeu et que l'aimant de l'électro-aimant est disposé à l'extérieur du moyeu.According to the invention, 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.
L'invention a aussi trait à un groupe moto-ventilateur comportant une hélice liée à rotation d'un arbre d'un moteur d'entraînement, l'hélice étant conforme à l'une quelconque des caractéristiques susmentionnées.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.
Le groupe moto-ventilateur peut comprendre un électro-aimant dont une bobine peut être solidaire d'un carter du moteur d'entraînement.The motor-fan unit may include an electromagnet, a coil of which may be integral with a housing of the drive motor.
L'invention vise aussi à protéger un véhicule, notamment du type d'une automobile, comportant un groupe moto-ventilateur susmentionné.The invention also aims to protect a vehicle, in particular of the type of an automobile, comprising an aforementioned motor-fan unit.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre du mode particulier de réalisation de l'invention, donné à titre d'exemple non limitatif et représenté aux dessins annexés, dans lesquels :
- la
figure 1 représente une vue en perspective d'une hélice dans une configuration d'interruption d'un écoulement du flux d'air au travers des pales, selon l'invention ; - les
figures 2 est une représentation en perspective de l'hélice de lafigure 1 , dans une configuration de libre circulation de l'air entre les pales de l'hélice, selon l'invention ; - la
figure 3 représente par une vue en perspective arrière, l'hélice de lafigure 1 afin de rendre visible selon une coupe partielle l'intérieur d'un moyeu de l'hélice - la
figure 4 est une représentation d'un groupe moto-ventilateur comportant l'hélice de l'invention, vue de dessus selon le plan de coupe IV-IV transversale de lafigure 3 ; - la
figure 5 est un agrandissement du moyeu de lafigure 3 , représenté selon une vue en perspective partielle, illustrant en partie un moyen de déplacement angulaire des pales par rapport au moyeu, selon l'invention.
- the
figure 1 shows a perspective view of a propeller in a configuration for interrupting a flow of the air flow through the blades, according to the invention; - the
figures 2 is a perspective representation of the propeller of thefigure 1 , in a configuration of free circulation of air between the blades of the propeller, according to the invention; - the
figure 3 represents by a rear perspective view, the propeller of thefigure 1 in order to make visible in a partial section the inside of a propeller hub - the
figure 4 is a representation of a motor-fan assembly comprising the propeller of the invention, seen from above along the IV-IV transverse section plane of thefigure 3 ; - the
figure 5 is an enlargement of the hub of thefigure 3 , shown in a partial perspective view, partially illustrating a means of angular displacement of the blades relative to the hub, according to the invention.
Dans la description qui va suivre, des éléments identiques ou analogues porteront les mêmes chiffres et nombres de référence. Les expressions telles que « arrière » et « avant », « gauche » et « droite », « supérieur » et « inférieur » et les orientations « longitudinale », « transversale » et « verticale » seront respectivement définies en référence au trièdre X, Y, Z et aux définitions données dans la description. Notamment, la direction longitudinale X correspond au sens de déplacement en marche avant d'un véhicule automobile (non représenté sur les figures), ce qui correspond également au sens inversé d'écoulement de l'air de refroidissement au travers de l'hélice de l'invention, également au travers du groupe moto-ventilateur portant une telle hélice.In the description which follows, identical or similar elements will bear the same figures and reference numbers. Expressions such as "rear" and "front", "left" and "right", "upper" and "lower" and the "longitudinal", "transverse" and "vertical" orientations will be respectively defined with reference to the trihedron X, Y, Z and the definitions given in the description. In particular, the longitudinal direction X corresponds to the direction of forward travel of a motor vehicle (not shown in the figures), which also corresponds to the reverse direction of air flow. cooling through the propeller of the invention, also through the motor-fan unit carrying such a propeller.
En référence aux figures, le groupe moto-ventilateur 1, plus particulièrement l'hélice 3 embarquée sur ce groupe moto-ventilateur, propose un système permettant d'améliorer le rendement du véhicule dans l'air, en réduisant le coefficient de pénétration dans l'air du véhicule.Referring to the figures, the motor-
Pour ce faire, l'hélice 3 du groupe moto-ventilateur 1 qui est apte à créer un flux d'air forcé destiné à traverser au moins un échangeur de chaleur d'un dispositif de refroidissement, est remarquable en ce sens qu'elle comprend des pales 6 qui sont montées à rotation par rapport à un moyeu 5 central de l'hélice. Une telle conception permet avantageusement de positionner l'hélice 3 dans des configurations différentes allant d'une configuration d'ouverture dans laquelle l'hélice est apte à provoquer une circulation d'air lors de sa mise en rotation, à une configuration de fermeture dans laquelle l'hélice est une cloison qui bloque l'écoulement de l'air ce qui améliore le rendement du véhicule.To do this, the
Le moyeu 5 sur lequel sont montées les différentes pales 6 de l'hélice comprend un bol propre à être calé sur un arbre moteur 4 pour être entrainé en rotation suivant un sens de rotation donné.The
Le moteur 4 est un moteur électrique qui est relié à une unité de commande. Le contrôle de sa puissance peut être réalisé par un dispositif de modulation de fréquence.The
Chaque pale 6 a un profil délimité par une ligne intérieure de forme incurvée et une ligne extérieure de forme incurvée et conformée de telle sorte que ces deux lignes se rejoignent en un bord d'attaque 62 et un bord de fuite 63.Each
Une pale 6 se définit également par une extrémité intérieure 61 et une extrémité extérieure 64.A
L'extrémité intérieure 61 est reliée au moyeu 5 de l'hélice.The
L'hélice comprend une virole 2 délimitant un anneau extérieur de l'hélice dont l'effet vise à réduire les nuisances sonores engendrées par le déplacement des pales 6. Un tel anneau extérieur de l'hélice 3 est destiné à coopérer par coopération et complémentarité de forme avec une ouverture ménagée dans une volute d'aspiration d'air afin d'en améliorer l'écoulement d'air par une réduction des turbulences lorsque l'hélice 3 est entraînée en rotation par le moteur 4.The propeller comprises a
L'extrémité extérieure 64 de chaque pale 6 est alors montée à rotation sur la virole 2. A cet effet, la virole 2 comprend des logements, un par pale, dans chacun desquels est disposé un axe de rotation d'une des pales 6. Le logement est de préférence du type d'un trou traversant de part en part l'anneau extérieur formé par la virole 2. Chaque pale 6 comprend un arbre de rotation s'étendant en saillie hors de son extrémité extérieure 64.The
La virole 2 est de préférence reliée à un moyeu 5 de l'hélice par des bras de liaison 21 visibles aux
A partir du moyeu 5, lequel est du type d'un bol, s'étendent radialement une pluralité de pales 6 dont l'extrémité intérieure 61 se rattache au moyeu et l'extrémité extérieure 64 est reliée à un anneau extérieur formant ladite virole 2.From the
Le moteur 4 est représenté de manière schématique à la
Quel que soit le type d'agencement, le moteur 4 comprend un rotor lié à rotation au moyeu 5 par un arbre d'entraînement non représenté s'étendant le long de l'axe 8 de rotation.Whatever the type of arrangement, the
L'hélice 3 de l'invention est remarquable en ce sens que ces pales 6 sont mobiles en rotation par rapport au moyeu 5, autour d'un axe 11 de rotation s'étendant radialement hors du moyeu 5.The
Sur la
Sur les
Une telle configuration des pales 6 confère à l'hélice 3 un rôle d'obturateur destiné à bloquer toute circulation d'air au travers du passage de l'hélice, qu'elle soit naturelle lorsque le véhicule est en mouvement ou forcée lorsque le moteur d'entraînement de l'hélice 3 est en mode de fonctionnement.Such a configuration of the
Dans ce qui suit va être décrit en détails ledit moyen de déplacement angulaire 7 des pales par rapport au moyeu de sorte que ces dernières peuvent évoluer entre des positions extrêmes d'ouverture et de fermeture et au moins une position intermédiaire de quasi fermeture dans laquelle un flux d'air de quantité réduit peut circuler entre les pales 6.In what follows, 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
Chaque pale 6 comprend un arbre de rotation 65 s'étendant en saillie hors de son extrémité intérieure 61. L'arbre 65 de rotation pivote autour d'un axe de rotation confondu avec l'axe de rotation de l'extrémité extérieure 64 sur la virole 2. L'arbre 65 de rotation comprend à son extrémité libre un excentrique 66.Each
Un déplacement de l'excentrique, du type d'un mouvement de translation parallèle à l'axe 8 de rotation de l'hélice 3 engendre en concomitance la rotation de la pale 8 autour de l'axe de rotation 11.A displacement of the eccentric, of the type of a translational movement parallel to the
Le dispositif de déplacement angulaire 7 comprend un disque 72 mobile en translation disposé à l'intérieur du bol formant le moyeu 5. Le disque 72 mobile est pourvu de logements 54 de réception des excentriques 66. Chaque logement 54 de réception peut être du type d'une lumière oblongue d'axe Z. La conception même des logements 54 est assujetties à celle des excentriques 66 de telle sorte que ce dernier se déplacer à coulissement le long de l'axe Z lorsque le dispositif de déplacement angulaire 7 est rendu mobile en translation d'axe X.The
Le dispositif de déplacement angulaire 7 comprend un moyen de déplacement du disque 72 mobile le long de l'axe 8 de rotation. Un tel moyen de déplacement du disque 72 comprend un électro-aimant 9 constitué d'un aimant 91 solidaire du disque 72 mobile et d'une bobine 92 pouvant être solidaire d'un carter du moteur 4 d'entrainement.The
L'aimant 91 peut être un disque aimanté comme représenté partiellement sur les
La bobine 92 peut être disposée sur un élément structurel d'un cadre support sur lequel est agencé le groupe moto-ventilateur.The
La bobine 92 peut être une partie du bobinage du moteur 4 de telle sorte que le déplacement angulaire des pales 6 de la configuration de fermeture vers la configuration d'ouverture s'effectue en concomitance de la mise en rotation de l'hélice 3.The
Le disque 72 mobile peut être réalisé par moulage d'une matière plastique.The
Avantageusement, le recours à la matière plastique permet de réaliser la liaison du disque 72 mobile à l'aimant 91 par surmoulage de telle sorte que le disque 72 mobile est solidaire en translation de l'aimant 91.Advantageously, the use of plastic allows the connection of the
Ledit moyen de déplacement angulaire 7 des pales 6 comprend un support 71 assemblé de manière réversible au moyeu 5 de préférence par vissage.Said means for
Le moyeu 5 se compose d'au moins deux demi-coquilles 51 et 52 assemblées l'une à l'autre par opposition de face afin de délimiter une chambre à l'intérieure de laquelle est agencé au moins le disque 72 mobile.The
L'une des demi-coquilles 51, du type d'un bol, comprend les bras de liaison 21 à la virole 2.One of the half-
L'autre des demi-coquilles 52 également du type d'un bol comprend, au niveau de sa paroi de fond, une ouverture sensiblement de forme cylindrique qui est fermée par le support 71 dudit moyen de déplacement angulaire 7.The other of the half-
Le moyeu 5 comprend un moyen de réception 53 formant, pour chaque pale 6, un palier transversal destiné à la rotation d'un arbre 65 de rotation de la pale s'étendant en saillie hors de son extrémité intérieure 61. Les bords périphériques extérieurs des deux demi-coquilles 51 et 52 comprennent des encoches formant ledit moyen de réception 53. Chaque encoche a sensiblement une section en demi-arc de cercle. Les encoches sont par paires disposées l'une au regard de l'autre de telle sorte que l'assemblage des deux demi-coquilles par leur bord périphérique extérieur permet de réaliser des tubes formant des paliers sur lesquels les arbres de rotation 65 des pales sont aptes à pivoter.The
Le moyen de déplacement angulaire 7 des pales comprend un ressort de rappel 10 qui est agencé entre le disque 72 mobile et le support 71. Le ressort de rappel 10 travaille en compression de telle sorte qu'il s'oppose au rapprochement du disque 71 et du support 72 sous l'influence de l'électro-aimant 9 relié à une unité de pilotage (non représentée).The means for
Le moyen de déplacement angulaire 7 des pales comprend un dispositif de guidage en translation du disque 72 mobile sur le support 71. Un tel dispositif de guidage est réalisé sous la forme d'une rampe de section tubulaire s'étendant en saillie hors d'une face intérieure du support 71 sur laquelle est montée à coulissement une paroi guidée de forme sensiblement complémentaire qui est ménagée sur le disque 72 mobile.The
Le ressort 10 de rappel est disposé autour de la rampe du support 71 et de la paroi guidée du disque 72.The
Afin de limiter le mouvement de translation du disque 72 le long de l'axe 8 de rotation, ledit moyen de déplacement angulaire 7 comprend au moyen de mise en butée du disque 72 sur le support 71. Les butées, plus particulièrement leur épaisseur, sont assujetties au profil des pales de telle sorte que dans la configuration d'ouverture du passage d'air, la position relative des pales 6 sur le moyeu 5 est limitée.In order to limit the translational movement of the
A titre d'exemple non limitatif, un tel moyen de mise en butée est réalisé par des nervures disposées sur le disque 72 et le support 71. De telles nervures permettent en outre d'augmenter la rigidité du disque 72 et du support 71 à la déformation. Les butées ont un profil circulaire de telle manière qu'elles s'étendent de manière coaxiale audit dispositif de guidage du disque 72 sur le support 71, susmentionné.By way of non-limiting example, such an abutment means is produced by ribs arranged on the
L'écart radial entre le dispositif de guidage susmentionné et ledit moyen de mise en butée délimite des logements de section annulaire, disposés respectivement sur le disque 72 mobile et le support 71, chaque logement recevant une extrémité du ressort 10 de rappel.The radial gap between the aforementioned guide device and said abutment means delimits housings of annular section, respectively arranged on the
En l'absence de besoin de refroidissement, les pales 6 de l'hélice 3 de l'invention sont dans la configuration de fermeture du passage d'air. Le ressort 10 exerce sur le disque 72 mobile un effort de poussée qui éloigne le disque 72 du support 71 de telle sorte que l'aimant 91 est en butée contre une face externe du support 71.In the absence of a need for cooling, the
Lorsque le dispositif d'échange thermique (non représenté) nécessite un refroidissement, l'unité de commande fait circuler un courant dans la bobine 92 de telle sorte que le champ magnétique ainsi créé par le courant dans la bobine tend à rapprocher le disque 72 du support 71. Le ressort 10 de rappel est comprimé. Le rapprochement du disque 72 mobile du support 71 engendre un déplacement des logements 54 de réception des excentriques 66, selon un mouvement en translation le long de l'axe 8 de rotation. L'excentrique 66 engendre une rotation des arbres 65 de rotation des pales 6 sur ledit moyen de réception 53 du moyeu 5.When the heat exchange device (not shown) requires cooling, the control unit circulates a current in the
Le courant peut être d'intensité variable de telle sorte qu'il génère un effort de traction d'intensité variable. L'écart entre les bords d'attaque 62 et de fuites 63 de pales 6 adjacentes est variable entre un écart minimal associé à la configuration de fermeture du passage d'air et un écart maximal associé à la configuration d'ouverture totale du passage d'air.The current can be of variable intensity so that it generates a tensile force of variable intensity. The gap between the
La position relative des pales 6 sur le moyeu 5 peut ainsi varier entre au moins une configuration d'ouverture et la configuration de fermeture du passage d'air qui est délimitée en partie par la volute 2.The relative position of the
La position relative des pales 6 sur le moyeu 5 est dépendante de la force de traction générée par l'électro-aimant 9 de telle sorte que selon l'intensité du courant circulant dans la bobine, les pales 6 peuvent être déplacées dans une configuration d'ouverture parmi plusieurs.The relative position of the
Le groupe moto-ventilateur 1 équipé de l'hélice 3 est remarquable en ce qu'il permet une gestion améliorée du débit d'air au travers de l'échangeur thermique, tout en augmentant le rendement du véhicule. L'hélice 3 à pas variable entre une configuration d'ouverture et une configuration de fermeture du passage d'air de la volute 1 permet une gestion de l'écoulement d'air optimisée, tant à l'arrêt de l'hélice qu'à la rotation forcée de l'hélice 3 par le moteur 4 du groupe moto-ventilateur 1.The motor-
L'hélice 3 est de préférence destinée à une application dans un groupe moto-ventilateur 1 embarqué dans un véhicule automobile. Elle peut bien entendu trouver d'autres applications dans lesquelles un besoin en fermeture d'un passage d'air et un besoin en écoulement forcé de l'air sont recherchés.The
De préférence, l'hélice 3 est un élément constitutif d'un groupe moto-ventilateur pour véhicule automobile, en ce sens qu'il permet l'écoulement forcé de l'air au travers d'un dispositif d'échange thermique. L'invention concerne donc un véhicule équipé d'un tel groupe moto-ventilateur.Preferably, the
Claims (10)
- Impeller (3) for an engine fan (1) comprising a shroud (2) delimiting an air flow passage through which blades (6) extend, the impeller (3) comprising a hub (5) that can be linked in rotation to a shaft of a drive motor (4), each blade (6) extending radially from the hub (5) by their inner end (61), each blade comprising a leading edge (62) and a trailing edge (63), the impeller comprising a means (7) for angular displacement of the blades with respect to the hub such that the pitch of the blades can vary between at least one opening configuration in which the leading and trailing edges (62, 63) of two adjacent blades are mutually separated from one another and a configuration of closure of the air passage of the shroud in which these same edges are brought together such that the blades form a wall blocking the air passage, characterized in that said means (7) for angular displacement of the blades (6) comprises a support (71) linked in rotation to the hub (5), a disc (72) that is movable in translation along the axis (8) of rotation of the hub, and an electromagnet (9) allowing an optimized management of the flow of air both when the impeller is stopped and during the forced rotation of the impeller by the motor (4).
- Impeller (3) according to Claim 1, characterized in that the hub (5) comprises two half-shells (51, 52), each half-shell comprising a reception means (53) forming, for each blade (6) a transverse bearing for rotation of a rotating shaft (65) extending protruding from an inner end (61) of the blade (6).
- Impeller (3) according to Claim 2, characterized in that the movable disc (72) comprises, for each blade (6), a recess (54) for receiving an excentric (66) extending protruding from the rotating shaft (65) of each blade (6) on the hub (5).
- Impeller (3) according to Claim 3, characterized in that said support (71) is a slideway along which the movable disc (72) can slide under the effect of a pulling force generated by the electromagnet (9).
- Impeller (3) according to Claim 4, characterized in that a half-shell (52) is linked to the shroud (2) by link arms (21), and is shaped to cooperate by complementarity of form with the support (71) of said means (7) for angular displacement of the blades (6).
- Impeller (3) according to one of Claims 4 and 5, characterized in that it comprises at least one return spring (10) exerting a load opposing the pulling force of the electromagnet (9).
- Impeller (3) according to any one of the preceding claims, characterized in that an outer end (64) of each blade (6) is mounted to rotate on the shroud (2) of the impeller.
- Impeller (3) according to Claim 1 in combination with any one of Claims 2 to 7, characterized in that the movable disc (72) comprises a fixing interface (73) for a magnet (91) so that the movable disc (72) is disposed inside the hub (5) and the magnet (91) of the electromagnet (9) is disposed outside the hub.
- Engine fan (1) comprising an impeller (3) linked in rotation to a shaft of a drive motor (4), characterized in that the impeller (3) conforms to any one of Claims 1 to 8.
- Vehicle, notably of the motor vehicle type, comprising an engine fan (1) according to Claim 9.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1562806A FR3045740B1 (en) | 2015-12-18 | 2015-12-18 | PROPELLER FOR A MOTOR FAN GROUP OF A COOLING SYSTEM OF A VEHICLE ENGINE |
PCT/FR2016/053311 WO2017103395A2 (en) | 2015-12-18 | 2016-12-09 | Impeller for a motor-driven fan unit of a vehilcle engine cooling system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3390839A2 EP3390839A2 (en) | 2018-10-24 |
EP3390839B1 true EP3390839B1 (en) | 2021-02-03 |
Family
ID=55411605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16825473.8A Active EP3390839B1 (en) | 2015-12-18 | 2016-12-09 | Impeller for a motor-driven fan unit of a vehilcle engine cooling system |
Country Status (3)
Country | Link |
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EP (1) | EP3390839B1 (en) |
FR (1) | FR3045740B1 (en) |
WO (1) | WO2017103395A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3077339A1 (en) * | 2018-01-31 | 2019-08-02 | Valeo Systemes Thermiques | FAN FOR MOTOR VEHICLE |
CN110701072A (en) * | 2019-11-04 | 2020-01-17 | 徐州雅居乐环保科技有限公司 | Air quantity adjusting device of axial flow fan |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013064337A (en) * | 2011-09-15 | 2013-04-11 | Hitachi Constr Mach Co Ltd | Blower |
Family Cites Families (5)
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 (en) * | 2009-02-12 | 2014-02-26 | 富士重工業株式会社 | Radiator unit for vehicles |
-
2015
- 2015-12-18 FR FR1562806A patent/FR3045740B1/en active Active
-
2016
- 2016-12-09 EP EP16825473.8A patent/EP3390839B1/en active Active
- 2016-12-09 WO PCT/FR2016/053311 patent/WO2017103395A2/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013064337A (en) * | 2011-09-15 | 2013-04-11 | Hitachi Constr Mach Co Ltd | Blower |
Also Published As
Publication number | Publication date |
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FR3045740B1 (en) | 2019-09-20 |
FR3045740A1 (en) | 2017-06-23 |
WO2017103395A3 (en) | 2017-10-19 |
EP3390839A2 (en) | 2018-10-24 |
WO2017103395A2 (en) | 2017-06-22 |
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