EP1571345A1 - Fan - Google Patents

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Publication number
EP1571345A1
EP1571345A1 EP05300100A EP05300100A EP1571345A1 EP 1571345 A1 EP1571345 A1 EP 1571345A1 EP 05300100 A EP05300100 A EP 05300100A EP 05300100 A EP05300100 A EP 05300100A EP 1571345 A1 EP1571345 A1 EP 1571345A1
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EP
European Patent Office
Prior art keywords
flange
fan according
counter
hub
flanges
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
EP05300100A
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German (de)
French (fr)
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EP1571345B1 (en
Inventor
Alain Buisson
Marc Elkeletian
Adrien Menard
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Moteurs Leroy Somer SAS
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Moteurs Leroy Somer SAS
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Application filed by Moteurs Leroy Somer SAS filed Critical Moteurs Leroy Somer SAS
Publication of EP1571345A1 publication Critical patent/EP1571345A1/en
Application granted granted Critical
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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

Definitions

  • the present invention relates to the attachment of the blades to the hub of a fan, including a helical fan.
  • German patent application DE 39 41 691 A1 discloses a fan wherein the blades are screwed onto flanges of the hub. This solution can present the disadvantage of introducing local stresses on the blades around the screws.
  • each blade is held between a flange and the counter-flange corresponding, which reduces the local stresses in the blade.
  • the clamping device may comprise at least one screw or a rivet. When a screw is used, it may be, for example, self-forming or, alternatively, classic net.
  • the clamping device may comprise a single screw for each blade.
  • the screw is central.
  • Such a screw can advantageously replace several rivets, for example.
  • the clamping force can be more easily controlled with a screw than with a rivet.
  • the hub is advantageously monolithic, being made for example by injection molding, especially aluminum or aluminum alloy.
  • the counter flange can be monolithic and obtained by injection molding also, especially aluminum or aluminum alloy.
  • the blade itself can be metallic, for example aluminum sheet or stamped steel, but it is not beyond the scope of the present invention if it is carried out in other materials.
  • the fan may comprise between 2 and 12, or even between 4 and 10, in particular between 5 and 8 blades, 7 blades for example.
  • the flanges may be inclined relative to the axis of rotation of the hub.
  • the flanges can for example generally extend in a plane whose normal is not parallel to the axis of rotation of the fan, in particular non-coplanar with this axis.
  • the flanges can for example extend out of a radial plane and / or out of a plane containing the axis of rotation of the fan.
  • Each flange may include a bore axis perpendicular to its plane.
  • the clamping device may comprise at least one washer interposed between a head of the screw or rivet and the flange.
  • the latter may include a countersink for receive the puck.
  • the counter-flange may comprise a barrel arranged to engage in a drilling of the bridle.
  • the counter-flange may comprise, on its inner face, a first relief configured to cooperate with a second relief formed on the face opposite the flange.
  • This first relief can be a recess for example.
  • the shape of the first relief can be not symmetrical of revolution, which can prevent him from turning relatively to the flange. he can for example be square.
  • the first relief may comprise inclined blanks to help center the counter flange on the flange during assembly.
  • the second relief may have a truncated pyramidal general shape, with for example four sides.
  • the counter-flange may comprise a slightly convex outer face towards outside, which can help to improve the aerodynamics and allow to obtain a against-flange whose thickness, variable, is chosen so as to have a constraint of relatively well distributed on its inner face, with a maximum to the right of the screw and a progressive decrease of this constraint when approaching the edges of the counter-flange.
  • the counter-flange may comprise two opposite notches, adapted to cooperate with corresponding tools during the manufacture of the fan.
  • the counter-flange can have a general diamond shape and the two notches can be located substantially on a diagonal of the rhombus.
  • FIG. 1 diagrammatically shows the hub 9 of a fan, this hub 9 being intended to be rotated about an axis of rotation X.
  • This hub 9 comprises at its periphery a succession of flanges 2 extending radially outward and each serving for fixing a blade 1 which has been shown schematic sectional view in Figure 2.
  • Each blade 1 has a flattened end portion which is fixed on the flange 2 corresponding by means of a counter-flange 3 and a clamping device 4 comprising a screw 5 and a washer 6.
  • All counter flanges are parts independent of each other and preferably identical.
  • the hub 9 is monolithic and made by injection under aluminum pressure.
  • the hub 9 comprises a bowl 21 to which the flanges 2 are connected, this bowl 21 internally with ribs 22 and at its center a bore 23 for the passage of the drive shaft of the engine.
  • This bore 23 has a groove 24 for receive a key from the shaft and improve the transfer of the drive torque.
  • the hub 9 comprises, in the example illustrated, an odd number of flanges 2, to seven flanges 2, but it is not beyond the scope of the present invention if it comprises a different number, for example between 2 and 10 flanges, or between 5 and 8.
  • the fan has the same number of counter-flanges 3 and blades 1.
  • Each of the flanges 2 comprises a bore 10, with a substantially perpendicular to the plane of the flange, but not parallel to the axis of rotation X of the hub.
  • the bore 10 may comprise an axis parallel to the axis of the hub.
  • Each of the flanges 2 comprises on its upper face 12 a countersink 11 for receiving the washer 6 and on its underside 13 a projection 14 forming a projection, which present in the illustrated example a general shape of truncated pyramid with four sides, as can be seen in Figure 3.
  • the blade 1 is held tight between the flange 2 and the counter-flange 3 by the screw 5.
  • the latter can be self-forming or alternatively with a classic net, but you do not go out of the present invention when the fixing device 4 has several screws and / or one or more rivets.
  • the counter-flange 3 is, in the example described, monolithic and obtained by injection of aluminum. It comprises, as illustrated in FIG. 4, a drum 27 arranged for engage in the drilling 10 of the flange 2 and receive the screw 5. This drum can be tapped during the introduction of the screw 5 when the latter is self-forming, or alternatively before the mounting the screw.
  • the counter-flange 3 further comprises, on its inner face, a recessed relief 28, configured to cooperate with the raised projection 14 supra.
  • the relief 28 is in the example described a recess which has a shape substantially square, with inclined flanks 32, adapted to the shape of the corresponding relief 14.
  • the relief 28 could be of another non-symmetrical form of revolution, especially polygonal.
  • the counter-flange 3 still has, as can be seen in FIG. outer face 29 curved outward, aerodynamic profile, to create the least possible turbulence when rotating the fan.
  • the counter-flange 3 has a general diamond shape and comprises two notches 30 opposite, located substantially on a diagonal of the rhombus, to receive mounting tools and allow easier mounting of the corresponding blade 1 on the hub 9.
  • the shape of the flanges and counter-flanges can be modified. These The latter may, for example, cooperate differently with the flanges, with for example a projection protruding on the counter-flanges coming into a recessed relief flanges.
  • each flange and the associated sector can be monolithic. It can for example be made by injection, for example aluminum, or still by injection of plastic material under pressure.
  • Each sector can be assembled on the hub by screws.
  • the hub may for example comprise a central portion serving support to the sectors, the flanges being monolithic with the sectors.
  • Such a configuration makes it possible to use molds for injection less complex, therefore less expensive, and to allow a certain modularity, for example in varying the number of blades.
  • base bridles cylindrical one can easily vary the inclination of the blades with respect to the axis of rotation of the hub by loosening the half-hubs and rotating the flange bases in their accommodation.
  • a non-monolithic hub can be used to manufacture of larger diameter propellers, or propellers whose number or orientation blades can be changed.
  • the fan according to the invention can be suitable for various applications industrial and especially be different from a ceiling fan.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The fan has two blades (1), and a hub including two flanges (2) for fixing the blades on the hub. Two companion flanges (3) are associated with the flanges (2) and include notches. A clamping device (4) is utilized for clamping each blade between the flanges and the companion flanges through a screw (5), where both the flanges (2, 3) are formed by injection molding.

Description

La présente invention concerne la fixation des pales sur le moyeu d'un ventilateur, notamment un ventilateur hélicoïde.The present invention relates to the attachment of the blades to the hub of a fan, including a helical fan.

On connaít par la demande de brevet allemand DE 39 41 691 A1 un ventilateur dans lequel les pales sont vissées sur des brides du moyeu. Cette solution peut présenter l'inconvénient d'introduire des contraintes locales sur les pales autour des vis.German patent application DE 39 41 691 A1 discloses a fan wherein the blades are screwed onto flanges of the hub. This solution can present the disadvantage of introducing local stresses on the blades around the screws.

Il existe un besoin pour disposer d'un ventilateur dont les pales puissent être fixées au moyeu d'une manière économique tout en remédiant à l'inconvénient ci-dessus.There is a need to have a fan whose blades can be affixed to the hub in an economical manner while overcoming the above disadvantage.

On connaít par le brevet US 5 304 037 et les demandes de brevet EP-A-0 979 948 et US 2003/228224 des ventilateurs de plafonds comportant des brides s'étendant dans un plan normal à l'axe de rotation du ventilateur. De tels ventilateurs peuvent ne pas fournir une ventilation entièrement satisfaisante dans certains cas.It is known from US Pat. No. 5,304,037 and patent applications EP-A-0 979 948 and US 2003/228224 ceiling fans having flanges extending in a plane normal to the axis of rotation of the fan. Such fans may not provide fully satisfactory ventilation in some cases.

La présente invention a ainsi pour objet un ventilateur comportant :

  • au moins deux pales,
  • un moyeu comportant au moins deux brides servant à la fixation des pales sur le moyeu,
  • au moins deux contre-brides associées chacune à une bride, et
  • un dispositif de serrage de chaque pale entre une bride et la contre-bride associée.
The present invention thus relates to a fan comprising:
  • at least two blades,
  • a hub comprising at least two flanges for fixing the blades on the hub,
  • at least two counter flanges each associated with a flange, and
  • a device for clamping each blade between a flange and the associated counter flange.

Grâce à l'invention, chaque pale est maintenue entre une bride et la contre-bride correspondante, ce qui réduit les contraintes locales dans la pale.Thanks to the invention, each blade is held between a flange and the counter-flange corresponding, which reduces the local stresses in the blade.

Cette meilleure répartition des contraintes peut notamment réduire le risque de déchirement de la pale sous l'effet de la superposition des contraintes statiques de serrage, des efforts centrifuges et des contraintes aérodynamiques.This better distribution of constraints can notably reduce the risk of tearing of the blade under the effect of the superposition of the static clamping stresses, centrifugal forces and aerodynamic constraints.

Le dispositif de serrage peut comporter au moins une vis ou un rivet. Lorsqu'une vis est utilisée, celle-ci peut être, par exemple, autoformeuse ou, en variante, à filet classique. Le dispositif de serrage peut comporter une vis unique pour chaque pale.The clamping device may comprise at least one screw or a rivet. When a screw is used, it may be, for example, self-forming or, alternatively, classic net. The clamping device may comprise a single screw for each blade.

Dans un mode particulier de réalisation, la vis est centrale. Une telle vis peut avantageusement remplacer plusieurs rivets, par exemple. Par ailleurs, l'effort de serrage peut être plus facilement maítrisé avec une vis qu'avec un rivet.In a particular embodiment, the screw is central. Such a screw can advantageously replace several rivets, for example. Moreover, the clamping force can be more easily controlled with a screw than with a rivet.

Le moyeu est avantageusement monolithique, étant réalisé par exemple par moulage par injection, notamment d'aluminium ou d'alliage d'aluminium. The hub is advantageously monolithic, being made for example by injection molding, especially aluminum or aluminum alloy.

La contre-bride peut être monolithique et obtenue par moulage par injection également, notamment d'aluminium ou d'alliage d'aluminium.The counter flange can be monolithic and obtained by injection molding also, especially aluminum or aluminum alloy.

L'obtention de la bride et de la contre-bride par moulage par injection peut permettre d'éviter toute reprise d'usinage et d'abaisser le coût de la fabrication du ventilateur.Obtaining the flange and counter flange by injection molding can to avoid any resumption of machining and to lower the cost of manufacturing the fan.

La pale elle-même peut être métallique, par exemple en tôle d'aluminium ou d'acier emboutie, mais on ne sort pas du cadre de la présente invention si elle est réalisée dans d'autres matériaux.The blade itself can be metallic, for example aluminum sheet or stamped steel, but it is not beyond the scope of the present invention if it is carried out in other materials.

Le ventilateur peut comporter entre 2 et 12, voire entre 4 et 10, notamment entre 5 et 8 pales, 7 pales par exemple.The fan may comprise between 2 and 12, or even between 4 and 10, in particular between 5 and 8 blades, 7 blades for example.

Les brides peuvent être inclinées par rapport à l'axe de rotation du moyeu. Les brides peuvent par exemple s'étendre généralement dans un plan dont la normale n'est pas parallèle à l'axe de rotation du ventilateur, notamment non-coplanaire avec cet axe. Les brides peuvent par exemple s'étendre hors d'un plan radial et/ou hors d'un plan contenant l'axe de rotation du ventilateur.The flanges may be inclined relative to the axis of rotation of the hub. The flanges can for example generally extend in a plane whose normal is not parallel to the axis of rotation of the fan, in particular non-coplanar with this axis. The flanges can for example extend out of a radial plane and / or out of a plane containing the axis of rotation of the fan.

Chaque bride peut comporter un perçage d'axe perpendiculaire à son plan.Each flange may include a bore axis perpendicular to its plane.

Le dispositif de serrage peut comporter au moins une rondelle intercalée entre une tête de la vis ou du rivet et la bride. Cette dernière peut comporter un lamage pour recevoir la rondelle.The clamping device may comprise at least one washer interposed between a head of the screw or rivet and the flange. The latter may include a countersink for receive the puck.

La contre-bride peut comporter un fût agencé pour s'engager dans un perçage de la bride.The counter-flange may comprise a barrel arranged to engage in a drilling of the bridle.

La contre-bride peut comporter, sur sa face intérieure, un premier relief configuré pour coopérer avec un second relief formé sur la face en regard de la bride. Ce premier relief peut être un renfoncement par exemple. La forme du premier relief peut être non symétrique de révolution, ce qui peut lui éviter de tourner relativement à la bride. Il peut être par exemple de forme carrée. Le premier relief peut comporter des flans inclinés afm de contribuer au centrage de la contre-bride sur la bride lors du montage. Le deuxième relief peut présenter une forme générale pyramidale tronquée, avec par exemple quatre côtés.The counter-flange may comprise, on its inner face, a first relief configured to cooperate with a second relief formed on the face opposite the flange. This first relief can be a recess for example. The shape of the first relief can be not symmetrical of revolution, which can prevent him from turning relatively to the flange. he can for example be square. The first relief may comprise inclined blanks to help center the counter flange on the flange during assembly. The second relief may have a truncated pyramidal general shape, with for example four sides.

La contre-bride peut comporter une face extérieure légèrement bombée vers l'extérieur, ce qui peut contribuer à améliorer l'aérodynamique et permettre d'obtenir une contre-bride dont l'épaisseur, variable, est choisie de façon à avoir une contrainte de serrage relativement bien répartie sur sa face intérieure, avec un maximum au droit de la vis et une décroissance progressive de cette contrainte lorsqu'on se rapproche des bords de la contre-bride.The counter-flange may comprise a slightly convex outer face towards outside, which can help to improve the aerodynamics and allow to obtain a against-flange whose thickness, variable, is chosen so as to have a constraint of relatively well distributed on its inner face, with a maximum to the right of the screw and a progressive decrease of this constraint when approaching the edges of the counter-flange.

La contre-bride peut comporter deux encoches opposées, adaptées à coopérer avec un outillage correspondant lors de la fabrication du ventilateur. La contre-bride peut présenter une forme générale de losange et les deux encoches peuvent être situées sensiblement sur une diagonale du losange.The counter-flange may comprise two opposite notches, adapted to cooperate with corresponding tools during the manufacture of the fan. The counter-flange can have a general diamond shape and the two notches can be located substantially on a diagonal of the rhombus.

L'invention pourra être mieux comprise à la lecture de la description détaillée qui va suivre, d'un exemple de réalisation non limitatif de celle-ci, et à l'observation du dessin annexé, sur lequel :

  • la figure 1 représente en vue de dessus le moyeu d'un ventilateur réalisé conformément à l'invention,
  • la figure 2 illustre en coupe axiale, schématique et partielle, la fixation d'une pale sur le moyeu de la figure 1,
  • la figure 3 représente en vue de dessous, partiellement, le moyeu de la figure 1, et
  • les figures 4 et 5 représentent respectivement de dessus et de dessous la contre-bride de la figure 2.
The invention will be better understood on reading the following detailed description of a nonlimiting exemplary embodiment thereof, and on the observation of the appended drawing, in which:
  • FIG. 1 is a plan view of the hub of a fan produced in accordance with the invention;
  • FIG. 2 is a diagrammatic and partial axial section showing the attachment of a blade to the hub of FIG. 1,
  • FIG. 3 is a bottom view, partially, of the hub of FIG. 1, and
  • FIGS. 4 and 5 respectively represent from above and from below the counter-flange of FIG.

On a représenté à la figure 1, de manière schématique, le moyeu 9 d'un ventilateur, ce moyeu 9 étant destiné à être entraíné en rotation autour d'un axe de rotation X. Ce moyeu 9 comporte à sa périphérie une succession de brides 2 s'étendant radialement vers l'extérieur et servant chacune à la fixation d'une pale 1 que l'on a représentée de manière schématique en coupe à la figure 2.FIG. 1 diagrammatically shows the hub 9 of a fan, this hub 9 being intended to be rotated about an axis of rotation X. This hub 9 comprises at its periphery a succession of flanges 2 extending radially outward and each serving for fixing a blade 1 which has been shown schematic sectional view in Figure 2.

Chaque pale 1 comporte une partie d'extrémité aplatie qui est fixée sur la bride 2 correspondante au moyen d'une contre-bride 3 et d'un dispositif de serrage 4 comportant une vis 5 et une rondelle 6.Each blade 1 has a flattened end portion which is fixed on the flange 2 corresponding by means of a counter-flange 3 and a clamping device 4 comprising a screw 5 and a washer 6.

Toutes les contre-brides sont des pièces indépendantes les unes des autres et de préférence identiques.All counter flanges are parts independent of each other and preferably identical.

Dans l'exemple décrit, le moyeu 9 est monolithique et réalisé par injection sous pression d'aluminium. Le moyeu 9 comporte un bol 21 auquel sont reliées les brides 2, ce bol 21 comportant intérieurement des nervures 22 et en son centre un perçage 23 pour le passage de l'arbre d'entraínement du moteur. Ce perçage 23 comporte une rainure 24 pour recevoir une clavette de l'arbre et améliorer le transfert du couple d'entraínement.In the example described, the hub 9 is monolithic and made by injection under aluminum pressure. The hub 9 comprises a bowl 21 to which the flanges 2 are connected, this bowl 21 internally with ribs 22 and at its center a bore 23 for the passage of the drive shaft of the engine. This bore 23 has a groove 24 for receive a key from the shaft and improve the transfer of the drive torque.

Le moyeu 9 comporte, dans l'exemple illustré, un nombre impair de brides 2, à savoir sept brides 2, mais on ne sort pas du cadre de la présente invention s'il en comporte un nombre différent, par exemple entre 2 et 10 brides, voire entre 5 et 8. Le ventilateur comporte le même nombre de contre-brides 3 et pales 1.The hub 9 comprises, in the example illustrated, an odd number of flanges 2, to seven flanges 2, but it is not beyond the scope of the present invention if it comprises a different number, for example between 2 and 10 flanges, or between 5 and 8. The fan has the same number of counter-flanges 3 and blades 1.

Chacune des brides 2 comporte un perçage 10, d'axe sensiblement perpendiculaire au plan de la bride, mais non parallèle à l'axe de rotation X du moyeu.Each of the flanges 2 comprises a bore 10, with a substantially perpendicular to the plane of the flange, but not parallel to the axis of rotation X of the hub.

En variante, le perçage 10 peut comporter un axe parallèle à l'axe du moyeu.Alternatively, the bore 10 may comprise an axis parallel to the axis of the hub.

Chacune des brides 2 comporte sur sa face supérieure 12 un lamage 11 pour recevoir la rondelle 6 et sur sa face inférieure 13 un relief 14 formant saillie, lequel présente dans l'exemple illustré une forme générale de pyramide tronquée à quatre côtés, comme on peut le voir sur la figure 3.Each of the flanges 2 comprises on its upper face 12 a countersink 11 for receiving the washer 6 and on its underside 13 a projection 14 forming a projection, which present in the illustrated example a general shape of truncated pyramid with four sides, as can be seen in Figure 3.

La pale 1 est maintenue serrée entre la bride 2 et la contre-bride 3 par la vis 5. Cette dernière peut être autoformeuse ou en variante à filet classique, mais on ne sort pas du cadre de la présente invention lorsque le dispositif de fixation 4 comporte plusieurs vis et/ou un ou plusieurs rivets.The blade 1 is held tight between the flange 2 and the counter-flange 3 by the screw 5. The latter can be self-forming or alternatively with a classic net, but you do not go out of the present invention when the fixing device 4 has several screws and / or one or more rivets.

La contre-bride 3 est, dans l'exemple décrit, monolithique et obtenue par injection d'aluminium. Elle comporte, comme illustré à la figure 4, un fût 27 agencé pour s'engager dans le perçage 10 de la bride 2 et recevoir la vis 5. Ce fût peut être taraudé lors de l'introduction de la vis 5 lorsque cette dernière est autoformeuse, ou en variante avant le montage de la vis.The counter-flange 3 is, in the example described, monolithic and obtained by injection of aluminum. It comprises, as illustrated in FIG. 4, a drum 27 arranged for engage in the drilling 10 of the flange 2 and receive the screw 5. This drum can be tapped during the introduction of the screw 5 when the latter is self-forming, or alternatively before the mounting the screw.

La contre-bride 3 comporte encore, sur sa face intérieure, un relief en creux 28, configuré pour coopérer avec le relief en saillie 14 précité.The counter-flange 3 further comprises, on its inner face, a recessed relief 28, configured to cooperate with the raised projection 14 supra.

Le relief 28 est dans l'exemple décrit un renfoncement qui présente une forme sensiblement carrée, avec des flans 32 inclinés, adaptés à la forme du relief correspondant 14.The relief 28 is in the example described a recess which has a shape substantially square, with inclined flanks 32, adapted to the shape of the corresponding relief 14.

Le relief 28 pourrait être d'une autre forme non symétrique de révolution, notamment polygonale.The relief 28 could be of another non-symmetrical form of revolution, especially polygonal.

La contre-bride 3 présente encore, comme on peut le voir sur la figure 5, une face extérieure 29 bombée vers l'extérieur, de profil aérodynamique, afin de créer le moins de turbulences possibles lors de la rotation du ventilateur. The counter-flange 3 still has, as can be seen in FIG. outer face 29 curved outward, aerodynamic profile, to create the least possible turbulence when rotating the fan.

La contre-bride 3 présente une forme générale de losange et comporte deux encoches 30 opposées, situées sensiblement sur une diagonale du losange, pour recevoir des outils de montage et permettre un montage plus aisé de la pale 1 correspondante sur le moyeu 9.The counter-flange 3 has a general diamond shape and comprises two notches 30 opposite, located substantially on a diagonal of the rhombus, to receive mounting tools and allow easier mounting of the corresponding blade 1 on the hub 9.

Bien entendu, l'invention n'est pas limitée à l'exemple qui vient d'être décrit.Of course, the invention is not limited to the example just described.

On peut notamment modifier la forme des brides et des contre-brides. Ces dernières peuvent par exemple coopérer différemment avec les brides, avec par exemple un relief en saillie sur les contre-brides venant s'engager dans un relief en creux des brides.In particular, the shape of the flanges and counter-flanges can be modified. These The latter may, for example, cooperate differently with the flanges, with for example a projection protruding on the counter-flanges coming into a recessed relief flanges.

Bien entendu, on ne sort pas du cadre de la présente invention si le moyeu n'est pas monolithique, mais par exemple composé d'une pluralité de secteurs, notamment d'autant de secteurs que de pales. Dans ce cas, chaque bride et le secteur associé peut être monolithique. Il peut par exemple être réalisé par injection, par exemple d'aluminium, ou encore par injection de matière plastique sous pression. Chaque secteur peut être assemblé sur le moyeu par des vis. Le moyeu peut par exemple comporter une partie centrale servant de support aux secteurs, les brides étant monolithiques avec les secteurs.Of course, it is not beyond the scope of the present invention if the hub is not not monolithic, but for example composed of a plurality of sectors, in particular as many sectors as blades. In this case, each flange and the associated sector can be monolithic. It can for example be made by injection, for example aluminum, or still by injection of plastic material under pressure. Each sector can be assembled on the hub by screws. The hub may for example comprise a central portion serving support to the sectors, the flanges being monolithic with the sectors.

Une telle configuration permet d'utiliser des moules pour l'injection moins complexes, donc moins coûteux, et de permettre une certaine modularité, par exemple en variant le nombre de pales.Such a configuration makes it possible to use molds for injection less complex, therefore less expensive, and to allow a certain modularity, for example in varying the number of blades.

En variante encore, on pourrait utiliser deux demi-moyeux généralement discoïdes, et disposer les pales entre ces deux demi-moyeux. En utilisant des brides à base cylindrique, on peut aisément faire varier l'inclinaison des pales par rapport à l'axe de rotation du moyeu en desserrant les demi-moyeux et en faisant tourner les bases des brides dans leur logement.In another variant, one could use two half-hubs generally discoid, and arrange the blades between these two half-hubs. Using base bridles cylindrical, one can easily vary the inclination of the blades with respect to the axis of rotation of the hub by loosening the half-hubs and rotating the flange bases in their accommodation.

Un moyeu non monolithique peut par exemple permettre la fabrication d'hélices de plus grand diamètre, ou encore d'hélices dont le nombre ou l'orientation des pales peut être modifié.For example, a non-monolithic hub can be used to manufacture of larger diameter propellers, or propellers whose number or orientation blades can be changed.

Le ventilateur selon l'invention peut convenir à diverses applications industrielles et notamment être différent d'un ventilateur de plafond.The fan according to the invention can be suitable for various applications industrial and especially be different from a ceiling fan.

Dans toute la description, y compris les revendications, l'expression « comportant un » doit être comprise comme étant synonyme de « comportant au moins un », sauf si le contraire est spécifié.Throughout the description, including the claims, the expression "Comprising one" must be understood as being synonymous with "comprising at least a ", unless the opposite is specified.

Claims (25)

Ventilateur comportant : au moins deux pales (1), un moyeu (9) comportant au moins deux brides (2) servant à la fixation des pales (1) sur le moyeu, les brides étant inclinées par rapport à l'axe de rotation (X) du moyeu, au moins deux contre-brides (3) associées chacune à une bride, et un dispositif de serrage (4) de chaque pale (1) entre une bride (2) et la contre-bride (3) associée. Fan comprising: at least two blades (1), a hub (9) having at least two flanges (2) for fixing the blades (1) on the hub, the flanges being inclined with respect to the axis of rotation (X) of the hub, at least two counter-flanges (3) each associated with a flange, and a clamping device (4) for each blade (1) between a flange (2) and the associated counter flange (3). Ventilateur selon la revendication précédente, caractérisé par le fait que le dispositif de serrage (4) comporte au moins une vis (5).Fan according to the preceding claim, characterized in that the clamping device (4) comprises at least one screw (5). Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait que la vis (5) est autoformeuse.Fan according to any one of the preceding claims, characterized in that the screw (5) is self-forming. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait que le moyeu (9) est monolithique.Fan according to any one of the preceding claims, characterized in that the hub (9) is monolithic. Ventilateur selon la revendication précédente, caractérisé par le fait que le moyeu (9) est réalisé par injection, notamment d'aluminium.Fan according to the preceding claim, characterized in that the hub (9) is made by injection, in particular aluminum. Ventilateur selon l'une quelconque des revendications 1 à 3, dans lequel le moyeu est non-monolithique, notamment composé d'une pluralité de secteurs.Fan according to any one of claims 1 to 3, wherein the hub is non-monolithic, especially composed of a plurality of sectors. Ventilateur selon la revendication précédente, dans lequel au moins une bride et le secteur associé sont monolithiques.Fan according to the preceding claim, wherein at least one flange and the associated sector are monolithic. Ventilateur selon la revendication 6, dans lequel le moyeu compose deux demi-moyeux généralement discoïdes.Fan according to claim 6, wherein the hub comprises two half-hubs generally discoidal. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait que la contre-bride (3) est monolithique et obtenue par injection, notamment d'aluminium.Fan according to any one of the preceding claims, characterized in that the counter-flange (3) is monolithic and obtained by injection, in particular aluminum. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comporte entre 2 et 12, voire entre 4 et 10, notamment entre 5 et 8 pales.Fan according to any one of the preceding claims, characterized in that it comprises between 2 and 12, or even between 4 and 10, in particular between 5 and 8 blades. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comporte 7 pales. Fan according to any one of the preceding claims, characterized in that it comprises 7 blades. Ventilateur selon la revendication précédente, caractérisé par le fait que la bride (2) comporte un perçage (10) d'axe perpendiculaire au plan de la bride.Fan according to the preceding claim, characterized in that the flange (2) has a bore (10) axis perpendicular to the plane of the flange. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait que le dispositif de serrage (4) comporte une vis (5) unique pour chaque pale.Fan according to any one of the preceding claims, characterized in that the clamping device (4) comprises a single screw (5) for each blade. Ventilateur selon la revendication précédente, caractérisé par le fait que le dispositif de serrage comporte au moins une rondelle (6) intercalée entre une tête de la vis (5) et la bride (2).Fan according to the preceding claim, characterized in that the clamping device comprises at least one washer (6) interposed between a head of the screw (5) and the flange (2). Ventilateur selon la revendication précédente, caractérisé par le fait que la bride comporte un lamage (11) pour recevoir la rondelle (6).Fan according to the preceding claim, characterized in that the flange comprises a countersink (11) for receiving the washer (6). Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait que la contre-bride (3) comporte un fût (27) agencé pour s'engager dans un perçage (10) de la bride (2).Fan according to any one of the preceding claims, characterized in that the counter-flange (3) comprises a shaft (27) arranged to engage in a bore (10) of the flange (2). Ventilateur selon l'une quelconque des deux revendications précédentes, caractérisé par le fait que la contre-bride (3) comporte, sur sa face intérieure (26), un premier relief (28) configuré pour coopérer avec un second relief (14) formé sur la face en regard (13) de la bride (2).Fan according to any one of the two preceding claims, characterized in that the counter-flange (3) comprises, on its inner face (26), a first relief (28) configured to cooperate with a second relief (14) formed on the face opposite (13) of the flange (2). Ventilateur selon la revendication précédente, caractérisé par le fait que le premier relief (28) est un renfoncement.Fan according to the preceding claim, characterized in that the first relief (28) is a recess. Ventilateur selon l'une des deux revendications précédentes, caractérisé par le fait que le premier relief (28) présente une forme non symétrique de révolution.Fan according to one of the two preceding claims, characterized in that the first relief (28) has a non-symmetrical shape of revolution. Ventilateur selon l'une quelconque des revendications 17 à 19, caractérisé par le fait que le premier relief (28) présente des flans (32) inclinés.Fan according to any one of claims 17 to 19, characterized in that the first relief (28) has sloping flanks (32). Ventilateur selon l'une quelconque des revendications 17 à 20, caractérisé par le fait que le deuxième relief (14) présente une forme générale pyramidale tronquée, à quatre côtés notamment.Fan according to any one of claims 17 to 20, characterized in that the second relief (14) has a generally truncated pyramidal shape, four sides in particular. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait que la contre-bride (3) présente une face extérieure (29) bombée vers l'extérieur.Fan according to any one of the preceding claims, characterized in that the counter-flange (3) has an outer face (29) curved outwards. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé par le fait que la contre-bride (3) comporte deux encoches (30) opposées. Fan according to any one of the preceding claims, characterized in that the counter-flange (3) has two notches (30) opposite. Ventilateur selon la revendication précédente, caractérisé par le fait que la contre-bride (3) présente une forme générale de losange et par le fait que les deux encoches (30) sont situées sensiblement sur une diagonale du losange.Fan according to the preceding claim, characterized in that the counter-flange (3) has a general diamond shape and in that the two notches (30) are located substantially on a diagonal of the rhombus. Ventilateur comportant : au moins deux pales (1), un moyeu (9) monolithique comportant au moins deux brides (2) servant à la fixation des pales (1) sur le moyeu, au moins deux contre-brides (3) associées chacune à une bride, et un dispositif de serrage (4) de chaque pale (1) entre une bride (2) et la contre-bride (3) associée. Fan comprising: at least two blades (1), a monolithic hub (9) having at least two flanges (2) for fixing the blades (1) to the hub, at least two counter-flanges (3) each associated with a flange, and a clamping device (4) for each blade (1) between a flange (2) and the associated counter flange (3).
EP05300100A 2004-03-01 2005-02-08 Fan Revoked EP1571345B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0402100 2004-03-01
FR0402100A FR2866930B1 (en) 2004-03-01 2004-03-01 FAN COMPRISING AT LEAST ONE FLANGE-FIXED BLADE AND COUNTER-FLANGE

Publications (2)

Publication Number Publication Date
EP1571345A1 true EP1571345A1 (en) 2005-09-07
EP1571345B1 EP1571345B1 (en) 2008-10-08

Family

ID=34746473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05300100A Revoked EP1571345B1 (en) 2004-03-01 2005-02-08 Fan

Country Status (5)

Country Link
EP (1) EP1571345B1 (en)
AT (1) ATE410605T1 (en)
DE (1) DE602005010135D1 (en)
ES (1) ES2314600T3 (en)
FR (1) FR2866930B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008015245A1 (en) * 2006-08-03 2008-02-07 Ebm-Papst Mulfingen Gmbh & Co. Kg 'ventilator wheel'
EP2025947A1 (en) * 2007-07-31 2009-02-18 Roberto Eduardo Mosiewicz Hub-profile connection system for axial fan and axial fan provided with this connection system
CN104235066A (en) * 2014-10-10 2014-12-24 江苏富丽华通用设备有限公司 External rotor axial flow fan
CN107171467A (en) * 2017-07-19 2017-09-15 广东泛仕达机电有限公司 A kind of motor alclad rotor structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941691A1 (en) * 1989-12-18 1990-07-12 Ziehl Abegg Gmbh & Co Kg Fan driven by electric motor with external rotor - has fan blades individually fastened to hum of motor rotor
US5304037A (en) * 1993-04-14 1994-04-19 Hunter Fan Company Ceiling fan blade vibration isolation system
EP0979948A1 (en) * 1998-08-10 2000-02-16 San-Chi Wu Fan blade assembly of a ceiling fan
US20030228224A1 (en) * 2002-06-05 2003-12-11 Using Co., Ltd. Securing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941691A1 (en) * 1989-12-18 1990-07-12 Ziehl Abegg Gmbh & Co Kg Fan driven by electric motor with external rotor - has fan blades individually fastened to hum of motor rotor
US5304037A (en) * 1993-04-14 1994-04-19 Hunter Fan Company Ceiling fan blade vibration isolation system
EP0979948A1 (en) * 1998-08-10 2000-02-16 San-Chi Wu Fan blade assembly of a ceiling fan
US20030228224A1 (en) * 2002-06-05 2003-12-11 Using Co., Ltd. Securing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008015245A1 (en) * 2006-08-03 2008-02-07 Ebm-Papst Mulfingen Gmbh & Co. Kg 'ventilator wheel'
US8128372B2 (en) 2006-08-03 2012-03-06 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilator wheel
CN101479484B (en) * 2006-08-03 2013-03-20 依必安-派特穆尔芬根股份有限两合公司 Ventilator wheel
EP2025947A1 (en) * 2007-07-31 2009-02-18 Roberto Eduardo Mosiewicz Hub-profile connection system for axial fan and axial fan provided with this connection system
US8177512B2 (en) 2007-07-31 2012-05-15 Roberto Eduardo Mosiewicz Hub-profile connection system for axial fan and axial fan provided with this connection system
CN104235066A (en) * 2014-10-10 2014-12-24 江苏富丽华通用设备有限公司 External rotor axial flow fan
CN107171467A (en) * 2017-07-19 2017-09-15 广东泛仕达机电有限公司 A kind of motor alclad rotor structure

Also Published As

Publication number Publication date
ATE410605T1 (en) 2008-10-15
FR2866930B1 (en) 2008-02-15
ES2314600T3 (en) 2009-03-16
EP1571345B1 (en) 2008-10-08
FR2866930A1 (en) 2005-09-02
DE602005010135D1 (en) 2008-11-20

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