EP1257365A1 - Device for spraying a coating product and spraying rotary element for same - Google Patents

Device for spraying a coating product and spraying rotary element for same

Info

Publication number
EP1257365A1
EP1257365A1 EP01907818A EP01907818A EP1257365A1 EP 1257365 A1 EP1257365 A1 EP 1257365A1 EP 01907818 A EP01907818 A EP 01907818A EP 01907818 A EP01907818 A EP 01907818A EP 1257365 A1 EP1257365 A1 EP 1257365A1
Authority
EP
European Patent Office
Prior art keywords
rotary
rotor
rotary element
spraying
magnet
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
EP01907818A
Other languages
German (de)
French (fr)
Other versions
EP1257365B1 (en
Inventor
Eric Prus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sames Kremlin SAS
Original Assignee
Sames SA
Sames Technologies SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sames SA, Sames Technologies SAS filed Critical Sames SA
Publication of EP1257365A1 publication Critical patent/EP1257365A1/en
Application granted granted Critical
Publication of EP1257365B1 publication Critical patent/EP1257365B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1035—Driving means; Parts thereof, e.g. turbine, shaft, bearings
    • B05B3/1042—Means for connecting, e.g. reversibly, the rotating spray member to its driving shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
    • B05B3/1014—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1035—Driving means; Parts thereof, e.g. turbine, shaft, bearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/11—Magnets

Definitions

  • the invention relates to a coating product projection device comprising a rotary spraying element, such as a bowl or a cup, driven in rotation at high speed by drive means such as a rotor of a air turbine.
  • a rotary spraying element which can be used with this device.
  • WO-A-94/12286 discloses a projection device comprising a bowl connected to the rotor of a sprayer by means of an interlocking crown capable of radial expansion. This system is satisfactory.
  • US-A-4, 473.188 discloses spreading equipment comprising a rotary nozzle driven by an electric motor.
  • the coupling between this nozzle and the motor output shaft takes place by pressing a metal ring integral with the nozzle on a magnet driven by this shaft.
  • This surface support presupposes precise positioning of the nozzle relative to the shaft, which limits the speed of rotation of the nozzle.
  • metal particles are deposited on the magnet, the surface support of the ring is no longer possible, which hinders the coupling between the nozzle and the motor shaft.
  • the successive positioning of nozzles on the shaft can damage the surface of the magnet intended to receive, in support, the nozzle rings.
  • the invention aims to propose an alternative solution to that known from WO-A-94/12286 which is particularly simple structurally, therefore reliable and of an attractive cost price, and compatible with the projection of coating product.
  • the invention relates to a device for spraying coating product of the aforementioned type which comprises means of magnetic coupling between the rotary spraying element and the associated drive means and which is characterized in that an air gap is provided between these magnetic coupling means.
  • the assembly and disassembly of the rotary spraying element on its drive means is particularly rapid since it suffices to approach the rotary element sufficiently close to the drive means. so that the magnetic coupling produces an effective solida ⁇ sation effect.
  • These coupling means also allow magnetic centering of the rotary element relative to the rotor. As an air gap is formed between the magnetic coupling means, there is no risk of matting of the surfaces facing the coupling means, even after several bowls have been put in place. In addition, any deposit of metallic particles or impurities on one of these facing surfaces does not interfere with the operation of the coupling means. The installation of a bowl therefore does not require any special precautions.
  • the rotary element is equipped with at least one magnet capable of cooperating with a magnetic looping element carried by the drive means.
  • the drive means are equipped with at least one magnet capable of cooperating with a magnetic looping element carried by the rotary element.
  • the rotary element and the rotor are each provided with a magnet, the polarities of these magnets being oriented so that an attractive force is generated between these magnets during the mounting the rotary element on the rotor.
  • the permanent magnet can be in the form of a ring or a sector of a ring centered on the axis of rotation of the rotary element.
  • several magnets in the form of ring sectors or studs are distributed around the axis of rotation.
  • the looping element may be a metal ring centered on the axis of rotation of the rotary element.
  • the magnet and / or the looping element is force fitted into a housing formed in the rotary element or in the drive means.
  • the device comprises means for mechanical centering of the rotary spraying element relative to the drive means.
  • These centering means allow a prepositioning of the magnetic coupling means during the positioning of the spraying element on the drive means.
  • These centering means also contribute to the good maintenance of the spraying element on its drive means.
  • a frustoconical surface of the rotary element is formed substantially around the magnetic coupling means. It can also be provided that a frustoconical surface of the drive means is provided at the level of a free edge of a skirt defining a volume for partial reception of the rotary element.
  • the magnetic coupling means also constitute means for self-centering of the rotary element on the rotor, which makes it possible to envisage the total or partial elimination of the mechanical centering means.
  • the invention also relates to a rotary element or spray bowl capable of being used with a device as previously described and which carries means capable of cooperating with complementary means provided on a drive member for the solida ⁇ sation by magnetic coupling of the bowl and the member in question, while the bowl is provided with a bearing surface against a corresponding surface of this member in a position such that an air gap is formed between the aforementioned magnetic coupling means which cooperate.
  • - Figure 1 is an axial section of a projection device according to a first embodiment of the invention during assembly;
  • - Figure 2 is an axial section of the device of Figure 1 assembled and
  • FIG. 3 is a view similar to Figure 2 for a device according to a second embodiment of the invention.
  • the rotor 1 of an air bearing turbine is partially shown. It is symmetrical about its axis of rotation XX 'and forms two frustoconical surfaces 11 and 12 also centered on the axis XX' and flared in direction of the outside of the turbine to which the rotor 1 belongs, that is to say towards the front of the projection device of the invention.
  • the rotor 1 Given its mode of drive by an air bearing turbine, the rotor 1 can reach rotational speeds of several tens of thousands of revolutions per minute, for example of the order of 30,000 rpm, or even of
  • front and rear are understood relative to an operating configuration of the device, the front side being oriented towards the object to be coated while the rear side is oriented at
  • the rotor 1 also forms a skirt 13 which is generally cylindrical and centered on the axis XX ′, the surface 12 being formed at the free edge 13a of the skirt 13, radially inside this free edge.
  • the rotor 1 also forms a housing 14 for receiving a ring 2 made of soft iron.
  • the housing 14 comprises a shoulder 14a and an external radial surface 14b against which the ring 2 is force fitted as shown by the arrows F- L in FIG. 1, the ring 2 being immobilized in the housing 14 by cooperation of shapes .
  • a bowl 3 is intended to be mounted on the rotor 1 so as to be driven in rotation at high speed around the axis XX ′.
  • This bowl comprises a central part 31 intended to be disposed in the internal volume of the skirt 13 opposite the outlet 51 of a tube 5 for supplying the bowl 3 with coating product, this tube 5 also being centered on the axis XX '.
  • the tube 5 allows an axial supply, by its rear side, of the bowl 3.
  • the central part 31 of the bowl 3 is connected to a spraying edge 32 by a web 33 on which the coating product is distributed by centrifugation. Channels 34 formed in the part 31 allow the flow of the coating product from the rear face 31a of the part 31 towards the front face 33a of the web 33, then towards the edge 32.
  • a first frustoconical surface 35 is provided at the level from the rear edge 36 of the bowl 3, outside of the latter, this surface 35 being convergent in the upstream direction of the tube 5.
  • the angle a x of opening of the surface 35 around the axis X - X ′ is substantially equal to the angle 2 of opening of the surface 11 around this same axis, so that a surface area of the surface 35 on the surface 11 can be envisaged.
  • the bowl 3 also forms a second frustoconical surface 37 also converging towards the axis XX 'in the upstream direction of the tube 5 and of which the opening angle is noted ⁇ ⁇ .
  • This angle is substantially equal to the angle ⁇ 2 of opening of the surface 12 around the axis XX '.
  • the distance dl between the median zones of the surfaces 11 and 12 is substantially equal to the distance d 2 between the median zones of the surfaces 35 and 36, so that simultaneous pressing of the surfaces 35 and 37 respectively on the surfaces 11 and 12 can to be obtained.
  • the cooperation of the surfaces 35 and 11 on the one hand, 37 and 12 on the other hand allows, by the orientation of these surfaces, to obtain a centering of the bowl 3 on the axis XX ′. Guiding or pre-positioning could also be obtained with a single set of cooperating surfaces 35 and 11 or 37 and 12.
  • the bowl 3 is equipped with a permanent magnet 4 of annular shape which is mounted in a housing 38 formed at the rear edge 36 of the bowl 3.
  • the housing 31 forms a shoulder 38a and a radial surface 38b generally cylindrical which allow a force fit of the magnet 4 in the housing 38 as shown by the arrows F 2 .
  • the magnet 4 is annular but a ring comprising several permanent magnets could also be used in place of the magnet 4.
  • several magnets in the form of studs can be distributed at the rear of the bowl 3, for example three magnets distributed at 120 °.
  • the magnet 4 is placed opposite the soft iron ring 2, an air gap e being provided due to the range of the surface 35 and 37 on surfaces 11 and 12.
  • Elements 2 and 4 make it possible to produce an intense magnetic coupling between the rotor 1 and the bowl 3, the ring 2 making it possible to close the magnetic field generated by the magnet 4.
  • an attraction force represented by the arrows F 3 in Figure 3 This effort contributing to strongly press surfaces 35 and 37 on surfaces 11 and 12, which contributes to an axial immobilization and rotation of the bowl 3 relative to the rotor 1.
  • the bowl 3 is immobilized in rotation relative to rotor 1 thanks to the friction forces between their contacting surfaces. It is also possible to envisage a locking in rotation of the bowl 3 on the rotor 1 by a mechanical device, for example of the key type.
  • the magnetic coupling elements 2 and 4 are arranged around the tube 5.
  • the device of the invention is compatible with an axial or central supply of the bowl with coating product, by its rear side.
  • the bowl 103 of this embodiment is intended to be mounted on a rotor 101 of an air turbine.
  • the bowl 103 is equipped with a ring 102 made of soft iron, fitted in a housing 138 formed near the rear edge 136 of the bowl 103.
  • the rotor 101 is equipped with a ring 104 formed from several magnets 104a, 104b, 104c, etc. .... in the form of ring sectors.
  • the ring 104 is received in a housing 114 formed inside the rotor 101.
  • elements 102 and 104 have substantially the same radius, so that they make it possible to obtain an effective magnetic coupling between the bowl 103 and the rotor 101, an air gap e being formed between them.
  • Tapered surfaces 112 and 135 are respectively provided on the rotor 111 and the bowl 103. They define the relative position of the elements 101 and 103 under the effect of the attraction exerted by the coupling elements 102 and 104. In particular, the width of the air gap e depends on the position of these surfaces.
  • This embodiment has the particular advantage that the ring 104 which constitutes the active part of the magnetic coupling means between the rotor and the bowl is housed inside the rotor 101, so that it is protected against possible impurities, the ring 102 not likely to attract metallic particles or filings when it is dismantled and stored outside the projection installation to which the device of one invention belongs.
  • This embodiment also makes it possible to provide that the magnets 104a, 104b, 104c .... of the ring 104 are electromagnets controlled by appropriate means mounted on the rotor 101. This makes it possible to activate or not these magnets depending on the assembly or disassembly of the bowl 103.
  • the rings 2 and 102 can be in one piece or made in several pieces. They are made of metal, preferably iron soft, steel or other ferromagnetic material.
  • two permanent magnets can be used to carry out the magnetic coupling.
  • One magnet is mounted on the bowl while the second is mounted on the rotor, the polarities of these magnets being oriented to obtain attraction of one magnet with respect to the other when the bowl is shown on the rotor.
  • the magnetic looping element which is constituted by the rings 2 and 102 of the embodiments described, is constituted by the second magnet.
  • the magnetic coupling means between the bowl and the rotor which are essentially symmetrical about the axis of rotation of the rotor and the bowl, make it possible to obtain self-centering of the bowl on the rotor.

Landscapes

  • Nozzles (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

The invention concerns a device comprising a spraying rotary element, such as a bowl (3), and driving means, such as a rotor (1) capable of driving the spraying element in rotation. It further comprises magnetic coupling means (2, 4) between the rotary element (3) and the driving means (1). An air gap (e) is provided between the coupling means (2, 4) which advantageously include at least a magnet (4) associated with a looping ring (2). The magnet (4) can be fitted on the rotor (1) and/or on the bowl.

Description

DISPOSITIF DE PROJECTION DE PRODUIT DE REVETEMENT ET ELEMENT ROTATIF DE PULVERISATION POUR UN TEL DISPOSITIF DEVICE FOR PROJECTING COATING PRODUCT AND ROTATING SPRAYING ELEMENT FOR SUCH A DEVICE
L'invention a trait à un dispositif de projection de produit de revêtement comprenant un élément rotatif de pulvérisation, tel qu'un bol ou une coupelle, entraîné en rotation à haute vitesse par des moyens d'entraînement tels qu'un rotor d'une turbine à air. L'invention a également trait à un élément rotatif de pulvérisation pouvant être utilisé avec ce dispositif.The invention relates to a coating product projection device comprising a rotary spraying element, such as a bowl or a cup, driven in rotation at high speed by drive means such as a rotor of a air turbine. The invention also relates to a rotary spraying element which can be used with this device.
Dans une installation de projection de produit de revêtement, liquide ou particulaire, il est connu de pulvériser le produit au moyen d'un bol ou d'une coupelle alimentée en produit et tournant à une vitesse de l'ordre de 30 000 tours/minute. A une telle vitesse de rotation, il est souhaitable que le bol ou la coupelle soit le plus léger possible et équilibré afin d'éviter, autant que faire se peut, les balourds, notamment si la turbine d'entraînement est une turbine à palier à air et/ou magnétique.In an installation for spraying coating product, liquid or particulate, it is known to spray the product by means of a bowl or a cup supplied with product and rotating at a speed of the order of 30,000 revolutions / minute . At such a speed of rotation, it is desirable that the bowl or the cup is as light as possible and balanced in order to avoid, as much as possible, the unbalances, in particular if the drive turbine is a bearing turbine with air and / or magnetic.
Il est connu d'assembler un élément rotatif de pulvérisation au rotor d'une turbine au moyen d'une tige filetée s 'étendant axialement par rapport au rotor et d'un taraudage axial de l'élément rotatif ou bol ou par des boulons répartis circonférentiellement autour de l'axe de rotation de cet élément. Un tel type d'assemblage alourdit considérablement l'ensemble tournant alors que les opérations de montage et de démontage sont longues et fastidieuses, ce qui n'est pas forcément compatible avec les temps de maintenance disponi- blés, notamment sur une chaîne de production de véhicules automobiles .It is known to assemble a rotary spraying element to the rotor of a turbine by means of a threaded rod extending axially with respect to the rotor and an axial tapping of the rotary element or bowl or by distributed bolts. circumferentially around the axis of rotation of this element. Such a type of assembly considerably increases the turning assembly while the assembly and disassembly operations are long and tedious, which is not necessarily compatible with the maintenance times available, in particular on a production line of motor vehicles .
WO-A-94/12286 divulgue un dispositif de projection comprenant un bol relié au rotor d'un pulvérisateur grâce à une couronne d'emboîtement susceptible d'expansion radiale. Ce système donne satisfaction.WO-A-94/12286 discloses a projection device comprising a bowl connected to the rotor of a sprayer by means of an interlocking crown capable of radial expansion. This system is satisfactory.
US-A-4 ,473,188 divulgue un matériel d' épandage comprenant une buse rotative entraînée par un moteur électrique. L'accouplement entre cette buse et l'arbre de sortie du moteur a lieu par appui d'une bague métallique solidaire de la buse sur un aimant entraîné par cet arbre. Cet appui surfacique pré-suppose un positionnement précis de la buse par rapport à l'arbre, ce qui limite la vitesse de rotation de la buse. En outre, si des particules métalliques se déposent sur l'aimant, l'appui surfacique de la bague n'est plus possible, ce qui gêne l'accouplement entre la buse et l'arbre du moteur. De plus, les mises en places successives de buses sur l'arbre peuvent abîmer la surface de l'aimant destinée à recevoir, en appui, les bagues des buses. Ce dispositif n'est donc pas adapté à la projection de produit de revêtement pour laquelle il doit être régulièrement procédé au nettoyage et/ou à l'échange d'un bol, avec mise en place subséquente de ce bol ou d'un nouveau bol. L' invention vise à proposer une solution alternative à celle connue de WO-A-94/12286 qui est particulièrement simple sur le plan structurel, donc fiable et d'un prix de revient attractif, et compatible avec la projection de produit de revêtement . Dans cet esprit, l'invention concerne un dispositif de projection de produit de revêtement du type précité qui comprend des moyens de couplage magnétique entre l'élément rotatif de pulvérisation et les moyens d'entraînement associés et qui est caractérisé en ce qu'un entrefer est ménagé entre ces moyens de couplage magnétique.US-A-4, 473.188 discloses spreading equipment comprising a rotary nozzle driven by an electric motor. The coupling between this nozzle and the motor output shaft takes place by pressing a metal ring integral with the nozzle on a magnet driven by this shaft. This surface support presupposes precise positioning of the nozzle relative to the shaft, which limits the speed of rotation of the nozzle. In addition, if metal particles are deposited on the magnet, the surface support of the ring is no longer possible, which hinders the coupling between the nozzle and the motor shaft. In addition, the successive positioning of nozzles on the shaft can damage the surface of the magnet intended to receive, in support, the nozzle rings. This device is therefore not suitable for the projection of coating product for which it is necessary to regularly clean and / or exchange a bowl, with subsequent installation of this bowl or of a new bowl. . The invention aims to propose an alternative solution to that known from WO-A-94/12286 which is particularly simple structurally, therefore reliable and of an attractive cost price, and compatible with the projection of coating product. In this spirit, the invention relates to a device for spraying coating product of the aforementioned type which comprises means of magnetic coupling between the rotary spraying element and the associated drive means and which is characterized in that an air gap is provided between these magnetic coupling means.
Grâce à l'utilisation de moyens de couplage magnétique, le montage et le démontage de l'élément rotatif de pulvérisation sur ses moyens d'entraînement sont particulièrement rapides puisqu'il suffit d'approcher l'élément rotatif suffisamment près des moyens d'entraînement pour que le couplage magnétique produise un effet de solidaπsation efficace. Ces moyens de couplage permettent également un centrage magnétique de l'élément rotatif par rapport au rotor. Comme un entrefer est ménagé entre les moyens de couplage magnétique, il n'y a pas de risque de matage des surfaces en regard des moyens de couplage, même après plusieurs mises en place de bol. De plus, un éventuel dépôt de particules métalliques ou d'impuretés sur l'une de ces surfaces en regard ne gêne pas le fonctionnement des moyens de couplage. La mise en place d'un bol ne requiert donc pas de précautions particulières .Thanks to the use of magnetic coupling means, the assembly and disassembly of the rotary spraying element on its drive means is particularly rapid since it suffices to approach the rotary element sufficiently close to the drive means. so that the magnetic coupling produces an effective solidaπsation effect. These coupling means also allow magnetic centering of the rotary element relative to the rotor. As an air gap is formed between the magnetic coupling means, there is no risk of matting of the surfaces facing the coupling means, even after several bowls have been put in place. In addition, any deposit of metallic particles or impurities on one of these facing surfaces does not interfere with the operation of the coupling means. The installation of a bowl therefore does not require any special precautions.
Selon un premier mode de réalisation de l'invention, l'élément rotatif est équipé d'au moins un aimant apte à coopérer avec un élément de bouclage magnétique porté par les moyens d'entraînement.According to a first embodiment of the invention, the rotary element is equipped with at least one magnet capable of cooperating with a magnetic looping element carried by the drive means.
Selon un autre mode de réalisation avantageux de l'invention, les moyens d'entraînement sont équipés d'au moins un aimant apte à coopérer avec un élément de bouclage magnétique porté par l'élément rotatif.According to another advantageous embodiment of the invention, the drive means are equipped with at least one magnet capable of cooperating with a magnetic looping element carried by the rotary element.
Selon un troisième mode de réalisation de l'invention, l'élément rotatif et le rotor sont chacun pourvus d'un aimant, les polarités de ces aimants étant orientées de telle sorte qu'une force d'attraction est générée entre ces aimants lors du montage de l'élément rotatif sur le rotor.According to a third embodiment of the invention, the rotary element and the rotor are each provided with a magnet, the polarities of these magnets being oriented so that an attractive force is generated between these magnets during the mounting the rotary element on the rotor.
Quel que soit le mode de réalisation considéré, l'aimant permanent peut être en forme d'anneau ou de secteur d'anneau centré sur l'axe de rotation de l'élément rotatif. En variante, plusieurs aimants en forme de secteurs d'anneau ou de plots sont répartis autour de l'axe de rotation. De même, l'élément de bouclage peut être un anneau métallique centré sur l'axe de rotation de l'élément rotatif.Whatever the embodiment considered, the permanent magnet can be in the form of a ring or a sector of a ring centered on the axis of rotation of the rotary element. Alternatively, several magnets in the form of ring sectors or studs are distributed around the axis of rotation. Likewise, the looping element may be a metal ring centered on the axis of rotation of the rotary element.
Selon un autre aspect avantageux de l'invention, l'aimant et/ou l'élément de bouclage est emmanché à force dans un logement ménagé dans l'élément rotatif ou dans les moyens d' entraînement .According to another advantageous aspect of the invention, the magnet and / or the looping element is force fitted into a housing formed in the rotary element or in the drive means.
Selon un autre aspect avantageux de l'invention, le dispositif comprend des moyens de centrage mécanique de l'élément rotatif de pulvérisation par rapport aux moyens d'entraînement. Ces moyens de centrage permettent un prépositionnement des moyens de couplage magnétique lors de la mise en place de l'élément de pulvérisation sur les moyens d'entraînement. Ces moyens de centrage contribuent également au bon maintien de l'élément de pulvérisation sur ses moyens d'entraînement. Dans ce cas, on peut prévoir que l'élément rotatif comprend au moins une surface tronconique de portée contre une surface tronconique correspondante des moyens d'entraînement. Avantageusement, une surface tronconique de l'élément rotatif est ménagée sensiblement autour des moyens de couplage magnétique. On peut, en outre, prévoir qu'une surface tronconique des moyens d'entraînement est ménagée au niveau d'un bord libre d'une jupe définissant un volume de réception partielle de l'élément rotatif.According to another advantageous aspect of the invention, the device comprises means for mechanical centering of the rotary spraying element relative to the drive means. These centering means allow a prepositioning of the magnetic coupling means during the positioning of the spraying element on the drive means. These centering means also contribute to the good maintenance of the spraying element on its drive means. In this case, provision may be made for the rotary element to comprise at least one frustoconical surface of bearing against a corresponding frustoconical surface of the means drive. Advantageously, a frustoconical surface of the rotary element is formed substantially around the magnetic coupling means. It can also be provided that a frustoconical surface of the drive means is provided at the level of a free edge of a skirt defining a volume for partial reception of the rotary element.
Selon un autre aspect avantageux de l'invention, les moyens de couplage magnétique constituent également des moyens d'auto-centrage de l'élément rotatif sur le rotor, ce qui permet d'envisager la suppression totale ou partielle des moyens de centrage mécanique.According to another advantageous aspect of the invention, the magnetic coupling means also constitute means for self-centering of the rotary element on the rotor, which makes it possible to envisage the total or partial elimination of the mechanical centering means.
L'invention concerne également un élément rotatif ou bol de pulvérisation susceptible d'être utilisé avec un dispositif tel que précédemment décrit et qui porte des moyens aptes à coopérer avec des moyens complémentaires prévus sur un organe d'entraînement pour la solidaπsation par couplage magnétique du bol et de l'organe en question, alors que le bol est pourvu d'une surface d'appui contre une surface correspondante de cet organe dans une position telle qu'un entrefer est ménagé entre les moyens de couplage magnétique précités qui coopèrent.The invention also relates to a rotary element or spray bowl capable of being used with a device as previously described and which carries means capable of cooperating with complementary means provided on a drive member for the solidaπsation by magnetic coupling of the bowl and the member in question, while the bowl is provided with a bearing surface against a corresponding surface of this member in a position such that an air gap is formed between the aforementioned magnetic coupling means which cooperate.
L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre de deux modes de réalisation d'un dispositif de projection de produit de revêtement conformes à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a coating product spraying device in accordance with its principle, given only to as an example and made with reference to the accompanying drawings in which:
- la figure 1 est une coupe axiale d'un dispositif de projection conforme à un premier mode de réalisation de l'invention en cours d'assemblage ; - la figure 2 est une coupe axiale du dispositif de la figure 1 assemblé et- Figure 1 is an axial section of a projection device according to a first embodiment of the invention during assembly; - Figure 2 is an axial section of the device of Figure 1 assembled and
- la figure 3 est une vue analogue à la figure 2 pour un dispositif conforme à un second mode de réalisation de l'invention. Aux figures 1 et 2 , le rotor 1 d'une turbine à palier à air est partiellement représenté. Il est symétrique autour de son axe de rotation X-X' et forme deux surfaces tronconiques 11 et 12 également centrées sur l'axe X-X' et évasées en direction de l'extérieur de la turbine à laquelle appartient le rotor 1, c'est-à-dire vers l'avant du dispositif de projection de l'invention.- Figure 3 is a view similar to Figure 2 for a device according to a second embodiment of the invention. In Figures 1 and 2, the rotor 1 of an air bearing turbine is partially shown. It is symmetrical about its axis of rotation XX 'and forms two frustoconical surfaces 11 and 12 also centered on the axis XX' and flared in direction of the outside of the turbine to which the rotor 1 belongs, that is to say towards the front of the projection device of the invention.
Compte tenu de son mode d'entraînement par une turbine à palier à air, le rotor 1 peut atteindre des vitesses de rotation de plusieurs dizaines de milliers de tour à la minute, par exemple de l'ordre de 30 000 tr/mn, voire deGiven its mode of drive by an air bearing turbine, the rotor 1 can reach rotational speeds of several tens of thousands of revolutions per minute, for example of the order of 30,000 rpm, or even of
80 000 tr/mn pour une turbine dite "à haute vitesse".80,000 rpm for a so-called "high speed" turbine.
Dans la présente description, les qualificatifs "avant" et "arrière" s'entendent par rapport à une configuration de fonctionnement du dispositif, le côté avant étant orienté vers l'objet à revêtir alors que le côté arrière est orienté àIn the present description, the qualifiers "front" and "rear" are understood relative to an operating configuration of the device, the front side being oriented towards the object to be coated while the rear side is oriented at
1' opposé .1 opposite.
Le rotor 1 forme également une jupe 13 globalement cylindrique et centrée sur l'axe X-X', la surface 12 étant ménagée au niveau du bord libre 13a de la jupe 13, radialement à l'intérieur de ce bord libre.The rotor 1 also forms a skirt 13 which is generally cylindrical and centered on the axis XX ′, the surface 12 being formed at the free edge 13a of the skirt 13, radially inside this free edge.
Le rotor 1 forme également un logement 14 de réception d'un anneau 2 réalisé en fer doux. Le logement 14 comprend un épaulement 14a et une surface radiale externe 14b contre lesquels l'anneau 2 est emmanché à force comme représenté par les flèches F-L à la figure 1, l'anneau 2 étant immobilisé dans le logement 14 par coopération de formes.The rotor 1 also forms a housing 14 for receiving a ring 2 made of soft iron. The housing 14 comprises a shoulder 14a and an external radial surface 14b against which the ring 2 is force fitted as shown by the arrows F- L in FIG. 1, the ring 2 being immobilized in the housing 14 by cooperation of shapes .
Un bol 3 est destiné à être monté sur le rotor 1 afin d'être entraîné en rotation à haute vitesse autour de l'axe X-X'. Ce bol comprend une partie centrale 31 destinée à être disposée dans le volume interne de la jupe 13 en regard du débouché 51 d'un tube 5 d'alimentation du bol 3 en produit de revêtement, ce tube 5 étant également centré sur l'axe X-X'. Le tube 5 permet une alimentation axiale, par son côté arrière, du bol 3. La partie centrale 31 du bol 3 est reliée à un bord de pulvérisation 32 par un voile 33 sur lequel le produit de revêtement se répartit par centrifugation. Des canaux 34 ménagés dans la partie 31 permettent l'écoulement du produit de revêtement de la face arrière 31a de la partie 31 vers la face avant 33a du voile 33, puis vers le bord 32.A bowl 3 is intended to be mounted on the rotor 1 so as to be driven in rotation at high speed around the axis XX ′. This bowl comprises a central part 31 intended to be disposed in the internal volume of the skirt 13 opposite the outlet 51 of a tube 5 for supplying the bowl 3 with coating product, this tube 5 also being centered on the axis XX '. The tube 5 allows an axial supply, by its rear side, of the bowl 3. The central part 31 of the bowl 3 is connected to a spraying edge 32 by a web 33 on which the coating product is distributed by centrifugation. Channels 34 formed in the part 31 allow the flow of the coating product from the rear face 31a of the part 31 towards the front face 33a of the web 33, then towards the edge 32.
Une première surface tronconique 35 est prévue au niveau du bord arrière 36 du bol 3, à l'extérieur de celui-ci, cette surface 35 étant convergente en direction de l'amont du tube 5. L'angle ax d'ouverture de la surface 35 autour de l'axe X- X' est sensiblement égal à l'angle 2 d'ouverture de la surface 11 autour de ce même axe, de sorte qu'une portée surfacique de la surface 35 sur la surface 11 peut être envisagée .A first frustoconical surface 35 is provided at the level from the rear edge 36 of the bowl 3, outside of the latter, this surface 35 being convergent in the upstream direction of the tube 5. The angle a x of opening of the surface 35 around the axis X - X ′ is substantially equal to the angle 2 of opening of the surface 11 around this same axis, so that a surface area of the surface 35 on the surface 11 can be envisaged.
Le bol 3 forme également une seconde surface tronconique 37 également convergente vers l'axe X-X' en direction de l'amont du tube 5 et dont on note βλ l'angle d'ouverture. Cet angle est sensiblement égal à l'angle β2 d'ouverture de la surface 12 autour de l'axe X-X'.The bowl 3 also forms a second frustoconical surface 37 also converging towards the axis XX 'in the upstream direction of the tube 5 and of which the opening angle is noted β λ . This angle is substantially equal to the angle β 2 of opening of the surface 12 around the axis XX '.
La distance dl entre les zones médianes des surfaces 11 et 12 est sensiblement égale à la distance d2 entre les zones médianes des surfaces 35 et 36, de sorte qu'un appui simultané des surfaces 35 et 37 respectivement sur les surfaces 11 et 12 peut être obtenu. En pratique, la coopération des surfaces 35 et 11 d'une part, 37 et 12 d'autre part permet, de par l'orientation de ces surfaces, d'obtenir un centrage du bol 3 sur l'axe X-X'. Un guidage ou pré-positionnement pourrait également être obtenu avec un seul jeu de surfaces coopérantes 35 et 11 ou 37 et 12.The distance dl between the median zones of the surfaces 11 and 12 is substantially equal to the distance d 2 between the median zones of the surfaces 35 and 36, so that simultaneous pressing of the surfaces 35 and 37 respectively on the surfaces 11 and 12 can to be obtained. In practice, the cooperation of the surfaces 35 and 11 on the one hand, 37 and 12 on the other hand allows, by the orientation of these surfaces, to obtain a centering of the bowl 3 on the axis XX ′. Guiding or pre-positioning could also be obtained with a single set of cooperating surfaces 35 and 11 or 37 and 12.
Conformément à l'invention, le bol 3 est équipé d'un aimant permanent 4 de forme annulaire qui est monté dans un logement 38 ménagé au niveau du bord arrière 36 du bol 3. Le logement 31 forme un épaulement 38a et une surface radiale 38b globalement cylindrique qui permettent un emmanchement à force de l'aimant 4 dans le logement 38 comme représenté par les flèche F2. L'aimant 4 est annulaire mais un anneau comprenant plusieurs aimants permanents pourrait être également utilisé à la place de l'aimant 4. Selon une autre alternative, plusieurs aimants en forme de plots peuvent être répartis à l'arrière du bol 3, par exemple trois aimants répartis à 120°. Lorsque le bol 3 est monté sur le rotor 1 comme représenté sur la figure 2, l'aimant 4 est disposé en regard de l'anneau en fer doux 2, un entrefer e étant ménagé du fait de la portée de la surface 35 et 37 sur les surfaces 11 et 12. Les éléments 2 et 4 permettent de réaliser un couplage magnétique intense entre le rotor 1 et le bol 3, l'anneau 2 permettant de refermer le champ magnétique généré par l'aimant 4. On obtient ainsi un effort d'attraction représenté par les flèche F3 à la figure 3 , cet effort contribuant à plaquer fortement les surfaces 35 et 37 sur des surfaces 11 et 12, ce qui contribue à une immobilisation axiale et en rotation du bol 3 par rapport au rotor 1. Le bol 3 est immobilisé en rotation par rapport au rotor 1 grâce aux forces de frottement entre leurs surfaces en contact. On peut en outre envisager un blocage en rotation du bol 3 sur le rotor 1 par un dispositif mécanique, par exemple du type clavette.According to the invention, the bowl 3 is equipped with a permanent magnet 4 of annular shape which is mounted in a housing 38 formed at the rear edge 36 of the bowl 3. The housing 31 forms a shoulder 38a and a radial surface 38b generally cylindrical which allow a force fit of the magnet 4 in the housing 38 as shown by the arrows F 2 . The magnet 4 is annular but a ring comprising several permanent magnets could also be used in place of the magnet 4. According to another alternative, several magnets in the form of studs can be distributed at the rear of the bowl 3, for example three magnets distributed at 120 °. When the bowl 3 is mounted on the rotor 1 as shown in FIG. 2, the magnet 4 is placed opposite the soft iron ring 2, an air gap e being provided due to the range of the surface 35 and 37 on surfaces 11 and 12. Elements 2 and 4 make it possible to produce an intense magnetic coupling between the rotor 1 and the bowl 3, the ring 2 making it possible to close the magnetic field generated by the magnet 4. One thus obtains an attraction force represented by the arrows F 3 in Figure 3, this effort contributing to strongly press surfaces 35 and 37 on surfaces 11 and 12, which contributes to an axial immobilization and rotation of the bowl 3 relative to the rotor 1. The bowl 3 is immobilized in rotation relative to rotor 1 thanks to the friction forces between their contacting surfaces. It is also possible to envisage a locking in rotation of the bowl 3 on the rotor 1 by a mechanical device, for example of the key type.
Lors de la mise en place du bol 1 sur le rotor 3 , il suffit à un opérateur d'approcher le bol 3 du rotor 1 en utilisant les surfaces 11, 12, 35 et 36 comme moyens de guidage jusqu'à ce que l'entrefer e entre l'aimant 4 et l'anneau 2 soit suffisamment faible pour que la force d'attraction magnétique entre les éléments 2 et 4 plaque fermement le bol 3 sur le rotor 1. La forme des surfaces 12 et 35 définit la largeur deWhen placing the bowl 1 on the rotor 3, an operator need only approach the bowl 3 of the rotor 1 using the surfaces 11, 12, 35 and 36 as guide means until the the air gap between the magnet 4 and the ring 2 is sufficiently small that the magnetic attraction force between the elements 2 and 4 firmly places the bowl 3 on the rotor 1. The shape of the surfaces 12 and 35 defines the width of
1 ' entrefer e .1 air gap e.
Les éléments de couplage magnétique 2 et 4 sont disposés autour du tube 5. En d'autres termes, le dispositif de l'invention est compatible avec une alimentation axiale ou centrale du bol en produit de revêtement, par son côté arrière .The magnetic coupling elements 2 and 4 are arranged around the tube 5. In other words, the device of the invention is compatible with an axial or central supply of the bowl with coating product, by its rear side.
Lorsqu'il convient de démonter le bol 3 par rapport au rotor 1, il suffit d'exercer sur le bol 3 un effort d'extraction globalement parallèle à l'axe X-X' et opposé à l'effort d'attraction magnétique représenté par les flèches F3.When it is necessary to dismantle the bowl 3 relative to the rotor 1, it suffices to exert on the bowl 3 an extraction force generally parallel to the axis XX 'and opposite to the magnetic attraction force represented by the arrows F 3 .
Aucun outillage spécifique n'est nécessaire, le montage et le démontage du bol 3 étant particulièrement simples et rapides .No specific tools are necessary, the assembly and disassembly of the bowl 3 being particularly simple and rapid.
Dans le second mode de réalisation de l'invention représenté à la figure 3, les éléments analogues à ceux du premier mode de réalisation portent des références identiques augmentées de 100.In the second embodiment of the invention shown in FIG. 3, elements similar to those of the first embodiment bear identical references increased by 100.
Le bol 103 de ce mode de réalisation est destiné à être monté sur un rotor 101 d'une turbine à air. Le bol 103 est équipé d'un anneau 102 en fer doux, emmanché dans un logement 138 ménagé à proximité du bord arrière 136 du bol 103. Le rotor 101 est équipé d'un anneau 104 formé de plusieurs aimants 104a, 104b, 104ç etc .... en forme de secteurs d' anneau.The bowl 103 of this embodiment is intended to be mounted on a rotor 101 of an air turbine. The bowl 103 is equipped with a ring 102 made of soft iron, fitted in a housing 138 formed near the rear edge 136 of the bowl 103. The rotor 101 is equipped with a ring 104 formed from several magnets 104a, 104b, 104c, etc. .... in the form of ring sectors.
L'anneau 104 est reçu dans un logement 114 formé à l'intérieur du rotor 101.The ring 104 is received in a housing 114 formed inside the rotor 101.
Comme les éléments 2 et 4 , les éléments 102 et 104 ont sensiblement le même rayon, de sorte qu' il permettent d'obtenir un couplage magnétique efficace entre le bol 103 et le rotor 101, un entrefer e étant ménagé entre eux.Like elements 2 and 4, elements 102 and 104 have substantially the same radius, so that they make it possible to obtain an effective magnetic coupling between the bowl 103 and the rotor 101, an air gap e being formed between them.
Des surfaces tronconiques 112 et 135 sont respectivement prévues sur le rotor 111 et le bol 103. Elles définissent la position relative des éléments 101 et 103 sous l'effet de l'attraction exercée par les éléments de couplage 102 et 104. En particulier, la largeur de l'entrefer e dépend de la position de ces surfaces.Tapered surfaces 112 and 135 are respectively provided on the rotor 111 and the bowl 103. They define the relative position of the elements 101 and 103 under the effect of the attraction exerted by the coupling elements 102 and 104. In particular, the width of the air gap e depends on the position of these surfaces.
Ce mode de réalisation présente l'avantage particulier que l'anneau 104 qui constitue la partie active des moyens de couplage magnétique entre le rotor et le bol est logé à l'intérieur du rotor 101, de sorte qu'il est protégé contre d'éventuelles impuretés, l'anneau 102 ne risquant pas d'attirer des particules métalliques ou de la limaille lorsqu'il est démonté et stocké à l'extérieur de l'installation de projection à laquelle appartient le dispositif de 1 ' invention.This embodiment has the particular advantage that the ring 104 which constitutes the active part of the magnetic coupling means between the rotor and the bowl is housed inside the rotor 101, so that it is protected against possible impurities, the ring 102 not likely to attract metallic particles or filings when it is dismantled and stored outside the projection installation to which the device of one invention belongs.
Ce mode de réalisation permet en outre de prévoir que les aimants 104a, 104b, 104ç .... de l'anneau 104 sont des électro-aimants commandés par des moyens appropriés montés sur le rotor 101. Ceci permet d'activer ou non ces aimants en fonction du montage ou du démontage du bol 103.This embodiment also makes it possible to provide that the magnets 104a, 104b, 104c .... of the ring 104 are electromagnets controlled by appropriate means mounted on the rotor 101. This makes it possible to activate or not these magnets depending on the assembly or disassembly of the bowl 103.
Il est également possible de prévoir dans ce second mode de réalisation, un seul électro-aimant de forme annulaire, de façon analogue à ce qui est décrit en référence au premier mode de réalisation de l'invention.It is also possible to provide in this second embodiment, a single electromagnet of annular shape, analogously to what is described with reference to the first embodiment of the invention.
Les anneaux 2 et 102 peuvent être monobloc ou réalisés en plusieurs pièces. Ils sont en métal, de préférence en fer doux, en acier ou en un autre matériau ferromagnétique.The rings 2 and 102 can be in one piece or made in several pieces. They are made of metal, preferably iron soft, steel or other ferromagnetic material.
Selon une variante non représentée de l'invention, deux aimants permanents peuvent être utilisés pour réaliser le couplage magnétique. Un aimant est monté sur le bol alors que le second est monté sur le rotor, les polarités de ces aimants étant orientées pour obtenir une attraction d'un aimant par rapport à l'autre lorsqu'on montre le bol sur le rotor. En fait, dans ce cas, l'élément de bouclage magnétique, qui est constitué par les anneaux 2 et 102 des modes de réalisation décrits, est constitué par le second aimant.According to a variant not shown of the invention, two permanent magnets can be used to carry out the magnetic coupling. One magnet is mounted on the bowl while the second is mounted on the rotor, the polarities of these magnets being oriented to obtain attraction of one magnet with respect to the other when the bowl is shown on the rotor. In fact, in this case, the magnetic looping element, which is constituted by the rings 2 and 102 of the embodiments described, is constituted by the second magnet.
Quel que soit le mode de réalisation considéré, les moyens de couplage magnétique entre le bol et le rotor, qui sont essentiellement symétriques autour de l'axe de rotation du rotor et du bol, permettent d'obtenir un auto-centrage du bol sur le rotor. Whatever the embodiment considered, the magnetic coupling means between the bowl and the rotor, which are essentially symmetrical about the axis of rotation of the rotor and the bowl, make it possible to obtain self-centering of the bowl on the rotor.

Claims

REVENDICATIONS
1. Dispositif de projection de produit de revêtement comprenant un élément rotatif de pulvérisation (3 ; 103), des moyens d'entraînement (1 ; 101) aptes à entraîner ledit élément en rotation et des moyens (2, 4 ; 102, 104) de couplage magnétique entre ledit élément rotatif et lesdits moyens d'entraînement, caractérisé en ce qu'un entrefer (e) est ménagé entre lesdits moyens de couplage magnétique (2, 4 ; 102, 104) .1. Device for spraying coating product comprising a rotary spraying element (3; 103), drive means (1; 101) capable of driving said rotating element and means (2, 4; 102, 104) magnetic coupling between said rotary element and said drive means, characterized in that an air gap (e) is formed between said magnetic coupling means (2, 4; 102, 104).
2. Dispositif selon la revendication 1, caractérisé en ce que ledit élément rotatif (3) est équipé d'au moins un aimant (4) apte à coopérer avec un élément de bouclage magnétique (2) porté par lesdits moyens d'entraînement (1) . 2. Device according to claim 1, characterized in that said rotary element (3) is equipped with at least one magnet (4) able to cooperate with a magnetic looping element (2) carried by said drive means (1 ).
3. Dispositif selon la revendication 1, caractérisé en ce que lesdits moyens d'entraînement (101) sont équipés d'au moins un aimant (104a, 104b, 104ç apte à coopérer avec un élément de bouclage magnétique (102) porté par ledit élément rotatif (103) . 3. Device according to claim 1, characterized in that said drive means (101) are equipped with at least one magnet (104a, 104b, 104c able to cooperate with a magnetic looping element (102) carried by said element rotary (103).
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que ledit élément rotatif et ledit rotor sont chacun pourvus d'un aimant, les polarités desdits aimants étant orientées de telle sorte qu'une force d'attraction est générée entre lesdits aimants lors du montage dudit élément rotatif sur ledit rotor.4. Device according to one of claims 1 to 3, characterized in that said rotary element and said rotor are each provided with a magnet, the polarities of said magnets being oriented so that a force of attraction is generated between said magnets during the mounting of said rotary element on said rotor.
5. Dispositif selon l'une des revendications 2 à 4, caractérisé en ce que ledit aimant (4 ; 104a, 104b, 104ç_) est en forme d'anneau ou de secteur d'anneau centré sur l'axe de rotation (X-X') dudit élément rotatif (3 ; 103). 5. Device according to one of claims 2 to 4, characterized in that said magnet (4; 104a, 104b, 104ç_) is in the form of a ring or ring sector centered on the axis of rotation (X- X ') of said rotary element (3; 103).
6. Dispositif selon l'une des revendications 2 à 4, caractérisé en ce qu'il comprend plusieurs aimants en forme de secteurs d'anneau (104a, 104b, 104ç_) ou de plots répartis autour de l'axe de rotation (X-X') dudit élément rotatif.6. Device according to one of claims 2 to 4, characterized in that it comprises several magnets in the form of ring sectors (104a, 104b, 104ç_) or studs distributed around the axis of rotation (X- X ') of said rotary element.
7. Dispositif selon l'une des revendications 2, 3, 5 ou 6, caractérisé en ce que ledit élément de bouclage est un anneau métallique (2 ; 102) centré sur l'axe de rotation (X- X') dudit élément rotatif.7. Device according to one of claims 2, 3, 5 or 6, characterized in that said looping element is a metal ring (2; 102) centered on the axis of rotation (XX ') of said rotary element .
8. Dispositif selon l'une des revendications 2 à 7, caractérisé en ce que ledit aimant (4 ; 104a, 104b, 104ç_) et/ou ledit élément de bouclage (2 ; 102) est emmanché à force dans un logement (14, 38 ; 114, 138) ménagé dans ledit élément rotatif (3 ; 103) ou dans lesdits moyens d'entraînement (1 ; 101) .8. Device according to one of claims 2 to 7, characterized in that said magnet (4; 104a, 104b, 104ç_) and / or said looping element (2; 102) is force fitted into a housing (14, 38; 114, 138) formed in said rotary element (3 ; 103) or in said drive means (1; 101).
9. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comprend des moyens (11, 12, 35, 37) de centrage mécanique dudit élément rotatif de pulvérisation (3 ; 103) par rapport auxdits moyens d'entraînement (1 ; 101) . 9. Device according to one of the preceding claims, characterized in that it comprises means (11, 12, 35, 37) for mechanical centering of said rotary spraying element (3; 103) relative to said drive means ( 1; 101).
10. Dispositif selon la revendication 9, caractérisé en ce que ledit élément rotatif (3 ; 103) comprend au moins une surface tronconique (35, 37) de portée contre une surface tronconique (11, 12) correspondante desdits moyens d'entraînement (1 ; 101) . 10. Device according to claim 9, characterized in that said rotary element (3; 103) comprises at least one frustoconical surface (35, 37) of bearing against a frustoconical surface (11, 12) corresponding to said drive means (1 ; 101).
11. Dispositif selon la revendication 10, caractérisé en ce que ladite surface tronconique (35) dudit élément rotatif (3 ; 103) est ménagée sensiblement autour desdits moyens de couplage magnétique (2, 4 ; 102, 104).11. Device according to claim 10, characterized in that said frustoconical surface (35) of said rotary element (3; 103) is formed substantially around said magnetic coupling means (2, 4; 102, 104).
12. Dispositif selon l'une des revendications 10 ou 11, caractérisé en ce que ladite surface tronconique (12) desdits moyens d'entraînement (1 ; 101) est ménagée au niveau d'un bord libre (13a) d'une jupe (13) définissant un volume de réception partielle dudit élément rotatif (3 ; 103) .12. Device according to one of claims 10 or 11, characterized in that said frustoconical surface (12) of said drive means (1; 101) is formed at a free edge (13a) of a skirt ( 13) defining a volume for partial reception of said rotary element (3; 103).
13. Dispositif selon l'une des revendications précéden- tes, caractérisé en ce que lesdits moyens de couplage magnétique (2, 4 ; 102, 104) constituent des moyens d'auto- centrage dudit élément rotatif de pulvérisation (3 ; 103) sur ledit rotor (1 ,- 101) .13. Device according to one of the preceding claims, characterized in that said magnetic coupling means (2, 4; 102, 104) constitute self-centering means of said rotary spraying element (3; 103) on said rotor (1, - 101).
14. Elément rotatif de pulvérisation apte à être utilisé dans un dispositif selon l'une des revendications précédentes et portant des moyens (4 ; 102) apte à coopérer avec des moyens complémentaires (2, 104) prévus sur un organe d'entraînement (1 ; 101) pour la solidarisation par couplage magnétique dudit élément (3 ; 103) et dudit organe, caractérisé en ce que ledit élément est pourvu d'une surface (35 ; 135) d'appui contre une surface correspondante (12 ; 112) dudit organe dans une position telle qu'un entrefer (e) est ménagé entre lesdits moyens de couplage magnétique qui coopèrent. 14. rotary spraying element capable of being used in a device according to one of the preceding claims and carrying means (4; 102) capable of cooperating with complementary means (2, 104) provided on a drive member (1 ; 101) for securing by magnetic coupling of said element (3; 103) and said member, characterized in that said element is provided with a surface (35; 135) bearing against a corresponding surface (12; 112) of said member in a position such that an air gap (e) is formed between said cooperating magnetic coupling means.
EP01907818A 2000-02-21 2001-02-15 Device for spraying a coating product and spraying rotary element for same Expired - Lifetime EP1257365B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0002112 2000-02-21
FR0002112A FR2805182B1 (en) 2000-02-21 2000-02-21 COATING PRODUCT SPRAYING DEVICE COMPRISING A ROTATING SPRAYING ELEMENT
PCT/FR2001/000459 WO2001062396A1 (en) 2000-02-21 2001-02-15 Device for spraying a coating product and spraying rotary element for same

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EP1257365A1 true EP1257365A1 (en) 2002-11-20
EP1257365B1 EP1257365B1 (en) 2007-04-04

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EP (1) EP1257365B1 (en)
JP (1) JP4791672B2 (en)
KR (1) KR100717612B1 (en)
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AU (1) AU2001235694A1 (en)
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DE60127655T2 (en) 2007-12-13
KR100717612B1 (en) 2007-05-15
ES2283392T3 (en) 2007-11-01
JP4791672B2 (en) 2011-10-12
FR2805182B1 (en) 2002-09-20
AU2001235694A1 (en) 2001-09-03
BR0107936B1 (en) 2009-05-05
JP2003524523A (en) 2003-08-19
US20010015386A1 (en) 2001-08-23
DE60127655D1 (en) 2007-05-16
US6592054B2 (en) 2003-07-15
CA2399624A1 (en) 2001-08-30
WO2001062396A1 (en) 2001-08-30
CN1189250C (en) 2005-02-16
TW505544B (en) 2002-10-11
KR20020075411A (en) 2002-10-04
BR0107936A (en) 2003-01-21
CN1404417A (en) 2003-03-19
CA2399624C (en) 2009-07-28
FR2805182A1 (en) 2001-08-24
EP1257365B1 (en) 2007-04-04

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