EP1257365B1 - Vorrichtung zum spritzen von beschichtungsmitteln und rotierendes zerstäubungselement für diese vorrichtung - Google Patents

Vorrichtung zum spritzen von beschichtungsmitteln und rotierendes zerstäubungselement für diese vorrichtung Download PDF

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Publication number
EP1257365B1
EP1257365B1 EP01907818A EP01907818A EP1257365B1 EP 1257365 B1 EP1257365 B1 EP 1257365B1 EP 01907818 A EP01907818 A EP 01907818A EP 01907818 A EP01907818 A EP 01907818A EP 1257365 B1 EP1257365 B1 EP 1257365B1
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EP
European Patent Office
Prior art keywords
rotary element
rotor
spraying
bowl
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.)
Expired - Lifetime
Application number
EP01907818A
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English (en)
French (fr)
Other versions
EP1257365A1 (de
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 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 Technologies SAS filed Critical Sames Technologies SAS
Publication of EP1257365A1 publication Critical patent/EP1257365A1/de
Application granted granted Critical
Publication of EP1257365B1 publication Critical patent/EP1257365B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 spraying device comprising a rotary spray element, such as a bowl or cup, rotated at high speed by drive means such as a rotor of a air turbine.
  • a rotary spray element such as a bowl or cup
  • the invention also relates to a rotary spray element that 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 a nesting ring capable of radial expansion. This system gives satisfaction.
  • US-A-4,473,188 discloses spreading equipment comprising a rotary nozzle driven by an electric motor. Coupling between this nozzle and the motor output shaft takes place by support of a metal ring integral with the nozzle on a magnet driven by this shaft. This surface support presupposes a 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 places of nozzles on the shaft can damage the surface of the magnet intended to receive, in support, the rings of the nozzles. This device is not suitable for the projection of coating product for which it must be regularly cleaned and / or exchanged a bowl, with subsequent introduction of this bowl or a new bowl .
  • the invention aims to provide an alternative solution to that known from WO-A-94/12286 which is particularly simple structurally, therefore reliable and an attractive cost, and compatible with the projection of coating product.
  • the invention relates to a coating product spraying device of the aforementioned type which comprises means for magnetic coupling between the rotary spray element and the associated drive means and which is characterized in that a gap is provided between these magnetic coupling means.
  • the assembly and disassembly of the rotary spray element on its drive means are particularly rapid since it is sufficient to approach the rotary element sufficiently close to the drive means for the magnetic coupling to produce an effective bonding effect.
  • These coupling means also allow magnetic centering of the rotary element relative to the rotor. As an air gap is provided between the magnetic coupling means, there is no risk of matting of the surfaces facing the coupling means, even after several bowl implementations. In addition, a possible deposition of metal particles or impurities on one of these surfaces opposite does not interfere with the operation of the coupling means. The establishment of a bowl does not require special precautions.
  • the rotary element is equipped with at least one magnet adapted to cooperate 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 rotating element and the rotor are each provided with a magnet, the polarities of these magnets being oriented so that a force of attraction is generated between these magnets during the mounting the rotary member on the rotor.
  • the permanent magnet may be in the form of a ring or ring sector centered on the axis of rotation of the rotary element.
  • several magnets in the form of ring sectors or pads 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 forced into a housing formed in the rotary element or in the drive means.
  • the device comprises means for mechanical centering of the rotary spray element relative to the drive means.
  • These centering means allow a pre-positioning of the magnetic coupling means during the introduction of the spray element on the drive means.
  • These centering means also contribute to the proper maintenance of the spray element on its drive means.
  • the rotary element comprises at least one frustoconical bearing surface against a corresponding frustoconical surface of the means drive.
  • a frustoconical surface of the rotary element is formed substantially around the magnetic coupling means.
  • a frustoconical surface of the drive means is provided at a free edge of a skirt defining a partial receiving volume of the rotating element.
  • the magnetic coupling means also constitute self-centering means for rotating the 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 and a drive member that can be used with a device as previously described.
  • the rotary spray element carries means adapted to cooperate with complementary means provided on a drive member for the magnetic coupling connection of the bowl and the member in question, while the bowl is provided with a surface of pressing against a corresponding surface of this member in a position such that an air gap is provided between the aforementioned magnetic coupling means which cooperate.
  • the rotor 1 Given its drive mode 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 80,000 rpm for a turbine called "high speed".
  • front and back refer to an operating configuration of the device, the front side being oriented towards the object to be coated while the rear side is facing the opposite.
  • the rotor 1 also forms a generally cylindrical skirt 13 and centered on the axis X-X ', the surface 12 being provided at the free edge 13a of the skirt 13, radially inwardly of the free edge.
  • the rotor 1 also forms a housing 14 for receiving a ring 2 made of soft iron.
  • the housing 14 includes a shoulder 14a and a radially outer surface 14 b against which the ring 2 is press-fitted as shown by arrows F 1 in Figure 1, the ring 2 being fixed in the housing 14 by cooperation of forms.
  • a bowl 3 is intended to be mounted on the rotor 1 in order to be rotated at high speed around the axis X-X '.
  • This bowl comprises a central portion 31 intended to be disposed in the internal volume of the skirt 13 facing the outlet 51 of a tube 5 for feeding the bowl 3 with a coating product, this tube 5 being also centered on the axis XX '.
  • the tube 5 allows axial feeding, by its rear side, of the bowl 3.
  • the central portion 31 of the bowl 3 is connected to a spray edge 32 by a web 33 on which the coating product is distributed by centrifugation. Channels 34 formed in the part 31 allows the flow of the coating material of the rear face 31a of the portion 31 towards the front face 33 a of the plate 33 and towards the edge 32.
  • a first frustoconical surface 35 is provided at the the rear edge 36 of the bowl 3, outside thereof, this surface 35 being convergent towards the upstream of the tube 5.
  • the angle ⁇ 1 of opening of the surface 35 about the axis XX 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 considered.
  • the bowl 3 also forms a second frustoconical surface 37 also converging towards the axis XX 'towards the upstream of the tube 5 and whose opening angle is noted ⁇ 1 . This angle is substantially equal to the opening angle ⁇ 2 of the surface 12 around the axis X-X '.
  • the distance d 1 between the median regions of the surfaces 11 and 12 is substantially equal to the distance d 2 between the median areas of the surfaces 35 and 36, so that a simultaneous pressing of the surfaces 35 and 37 respectively on the surfaces 11 and 12 can be obtained.
  • 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 38 and has a radial surface 38 b generally cylindrical which allow a force fitting of the magnet 4 in the housing 38 as represented by the arrow 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 pads may be distributed at the rear of the bowl 3, for example three magnets distributed at 120 °.
  • the magnet 4 is arranged opposite the soft iron ring 2, an air gap e being formed because of the range of the surface 35 and 37. on surfaces 11 and 12.
  • the elements 2 and 4 make it possible to carry out 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.
  • the bowl 3 is immobilized by rotation relative to the rotor 1 thanks to the friction forces between their surfaces in contact. It is also possible to envisage blocking of the bowl 3 on the rotor 1 by a mechanical device, for example of the key-type, in rotation.
  • the shape of the surfaces 12 and 35 defines the width of the gap e.
  • 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 feed of the bowl 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 has a ring 102 of soft iron, fitted in a recess 138 formed near the rear edge 136 of the bowl 103.
  • the rotor 101 has a ring 104 formed of a plurality of magnets 104 a, 104 b, 104 c etc .... in the form of ring sectors.
  • the ring 104 is received in a housing 114 formed inside the rotor 101.
  • the 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.
  • Frustoconical 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 gap width 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 metal particles or filings when disassembled and stored outside the projection installation to which the device of the invention belongs.
  • This embodiment also makes it possible to provide that the magnets 104 a , 104 b , 104 c, 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 according to the assembly or disassembly of the bowl 103.
  • the rings 2 and 102 may be monobloc 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 perform the magnetic coupling.
  • a magnet is mounted on the bowl while the second is mounted on the rotor, the polarities of these magnets being oriented to obtain an attraction of a magnet relative to the other when showing the bowl 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 a self-centering of the bowl on the rotor.

Landscapes

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

Claims (14)

  1. Sprühvorrichtung für Beschichtungsmaterial umfassend ein rotierendes Zerstäubungselement (3, 103), Antriebsmittel (1, 101), die geeignet sind, das Element zur Drehung anzutreiben und Mittel (2, 4; 102, 104) zur magnetischen Kopplung zwischen dem rotierenden Element und den Antriebsmittel, dadurch gekennzeichnet, dass ein Luftspalt (e) zwischen den Mitteln zur magnetischen Kopplung (2, 4; 102, 104) vorgesehen ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das rotierende Element (3) mit mindestens einem Magneten (4) ausgerüstet ist, der geeignet ist, mit einem Element (2) zur magnetischen Rückkopplung zusammenzuarbeiten, das von den Antriebsmitteln (1) getragen wird.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Antriebmittel (101) mit mindestens einem Magneten (104a, 104b, 104c) ausgerüstet sind, der zur Zusammenarbeit mit einem von dem rotierenden Element (103) getragenen Element (102) zur magnetischen Rückkopplung geeignet ist.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das rotierende Element und der Rotor jeweils mit einem Magneten versehen sind, wobei die Polaritäten der Magnete derart orientiert sind, dass eine Anziehungskraft zwischen den Magneten bei der Montage des rotierenden Elementes auf den Rotor erzeugt wird.
  5. Vorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Magnet (4; 104a, 104b, 104c) eine Ringform oder Ringsektionen aufweist, die zur Drehachse (X-X') des rotierenden Elementes (3; 103) zentriert sind.
  6. Vorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass sie mehrere Magneten in Form von Ringsektoren (104a, 104, b, 104c) oder Klötzchen umfasst, die um die Drehachse (X-X') des rotierenden Elementes herum verteilt sind.
  7. Vorrichtung nach einem der Ansprüche 2, 3, 5 oder 6, dadurch gekennzeichnet, dass das Rückkopplungselement ein Metallring (2; 102) ist, der zur Drehachse (X-X') des rotierenden Elementes zentriert ist.
  8. Vorrichtung nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass der Magnet (4; 104a, 104b, 104c) und/oder das Rückkopplungselement (2, 102) in eine Aufnahme (14, 38; 114, 138) eingepresst ist, die in dem rotierenden Element (3, 103) oder in den Antriebsmitteln (1, 101) eingearbeitet ist.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Mittel (11, 12, 35, 37) zur mechanischen Zentrierung des rotierenden Zerstäubungselementes (3; 13) in Bezug auf die Antriebsmittel (1; 101) umfasst.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das rotierende Element (3; 103) mindestens eine kegelige Fläche (35, 37) zur Auflage gegen eine entsprechende kegelige Fläche (11, 12) der Antriebsmittel (1, 101) umfasst.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass die kegelige Fläche (35) des rotierenden Elementes (3; 103) im Wesentlichen um die Mittel (2, 4; 102, 104) zur magnetischen Kopplung herum angeordnet ist.
  12. Vorrichtung nach einem der Ansprüche 10 oder 11, dadurch gekennzeichnet, dass die kegelige Fläche (12) der Antriebsmittel (1; 101) an einem freien Rand (13a) einer Schürze (13) angeordnet ist, die ein Aufnahmeteilvolumen des rotierenden Elementes (3; 103) bildet.
  13. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Mittel zur magnetischen Kopplung (2, 4; 102, 104) Mittel zur Selbstzentrierung des rotierenden Zerstäubungselementes (3; 103) auf den Rotor (1; 101) bilden.
  14. Rotierendes Zerstäubungselement (3; 103) und Antriebsorgan (1; 101), geeignet in einer Vorrichtung nach einem der vorhergehenden Ansprüche verwendet zu werden, wobei das rotierende Zerstäubungselement (3; 103) Mittel (4; 102) trägt, die geeignet sind, mit komplementären Mitteln (2, 104) zusammenzuarbeiten, die an dem Antriebsorgan (1; 101) für die Verbindung des Elementes (3; 103) und des Organs durch magnetische Kopplung vorgesehen sind, dadurch gekennzeichnet, dass das Element (3; 103) mit einer Fläche (35; 135) zum Abstützen gegen eine korrespondierende Fläche (11; 112) des Organs (1; 101) in einer solchen Position, dass ein Luftspalt (e) zwischen den zusammenarbeitenden Mitteln zur magnetischen Kopplung (2, 4; 102; 104) vorgesehen sind.
EP01907818A 2000-02-21 2001-02-15 Vorrichtung zum spritzen von beschichtungsmitteln und rotierendes zerstäubungselement für diese vorrichtung Expired - Lifetime EP1257365B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0002112 2000-02-21
FR0002112A FR2805182B1 (fr) 2000-02-21 2000-02-21 Dispositif de projection de produit de revetement comprenant un element rotatif de pulverisation
PCT/FR2001/000459 WO2001062396A1 (fr) 2000-02-21 2001-02-15 Dispositif de projection de produit de revêtement et element rotatif de pulverisation pour un tel dispositif

Publications (2)

Publication Number Publication Date
EP1257365A1 EP1257365A1 (de) 2002-11-20
EP1257365B1 true EP1257365B1 (de) 2007-04-04

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EP01907818A Expired - Lifetime EP1257365B1 (de) 2000-02-21 2001-02-15 Vorrichtung zum spritzen von beschichtungsmitteln und rotierendes zerstäubungselement für diese vorrichtung

Country Status (13)

Country Link
US (1) US6592054B2 (de)
EP (1) EP1257365B1 (de)
JP (1) JP4791672B2 (de)
KR (1) KR100717612B1 (de)
CN (1) CN1189250C (de)
AU (1) AU2001235694A1 (de)
BR (1) BR0107936B1 (de)
CA (1) CA2399624C (de)
DE (1) DE60127655T2 (de)
ES (1) ES2283392T3 (de)
FR (1) FR2805182B1 (de)
TW (1) TW505544B (de)
WO (1) WO2001062396A1 (de)

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US5584435A (en) * 1993-04-23 1996-12-17 E. Fischer Ag Bell atomizer with air/magnetic bearings
FR2714852B1 (fr) * 1994-01-07 1996-04-05 Sames Sa Dispositif de projection de produit de revêtement comprenant un bol de pulvérisation.
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JP2001246508A (ja) * 2000-03-03 2001-09-11 Toshiba Mach Co Ltd ２面拘束ツール

Also Published As

Publication number Publication date
FR2805182B1 (fr) 2002-09-20
BR0107936B1 (pt) 2009-05-05
ES2283392T3 (es) 2007-11-01
US20010015386A1 (en) 2001-08-23
FR2805182A1 (fr) 2001-08-24
CA2399624A1 (fr) 2001-08-30
CN1404417A (zh) 2003-03-19
TW505544B (en) 2002-10-11
CN1189250C (zh) 2005-02-16
BR0107936A (pt) 2003-01-21
CA2399624C (fr) 2009-07-28
JP4791672B2 (ja) 2011-10-12
WO2001062396A1 (fr) 2001-08-30
DE60127655T2 (de) 2007-12-13
EP1257365A1 (de) 2002-11-20
JP2003524523A (ja) 2003-08-19
KR20020075411A (ko) 2002-10-04
US6592054B2 (en) 2003-07-15
AU2001235694A1 (en) 2001-09-03
KR100717612B1 (ko) 2007-05-15
DE60127655D1 (de) 2007-05-16

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