EP0662349A1 - Apparatus for projecting a coating product with a spraying cup - Google Patents

Apparatus for projecting a coating product with a spraying cup Download PDF

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Publication number
EP0662349A1
EP0662349A1 EP94403026A EP94403026A EP0662349A1 EP 0662349 A1 EP0662349 A1 EP 0662349A1 EP 94403026 A EP94403026 A EP 94403026A EP 94403026 A EP94403026 A EP 94403026A EP 0662349 A1 EP0662349 A1 EP 0662349A1
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EP
European Patent Office
Prior art keywords
rotor
air
injectors
turbine
rotation
Prior art date
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Granted
Application number
EP94403026A
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German (de)
French (fr)
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EP0662349B1 (en
Inventor
Van Tan Pham
José Rodrigues
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Sames SA
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Sames SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0415—Driving means; Parts thereof, e.g. turbine, shaft, bearings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/06—Adaptations for driving, or combinations with, hand-held tools or the like control thereof
    • 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
    • B05B3/1092—Means for supplying shaping gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0426—Means for supplying shaping gas

Definitions

  • the invention relates to a device for spraying coating product, liquid or in powder form, comprising a spray bowl. It relates more particularly to the system for rotating the spray bowl by the rotor of an air turbine.
  • the spray bowl and / or the rotor necessarily have an unbalance, however light it may be, which implies a non-zero moment of inertia relative to the axis of rotation of the turbine. .
  • the coating product projection devices are often mounted on a robot, of the reciprocating type, lateral machine, roof machine or multi-axis robot.
  • the movements generated by these robots cause accelerations of the turbine perpendicular to its axis of rotation, which creates parasitic oscillations which are not damped and last.
  • the invention solves all of these problems.
  • a coating product projection device comprising a spray bowl driven in rotation by the rotor of an air turbine, characterized in that means are provided so that the resulting centripetal aerodynamic forces induced by the air jets rotational drive on the rotor is not zero.
  • the means making it possible to carry out the invention are, for example, injectors for driving the rotor in rotation, distributed irregularly around the periphery of the stator of the turbine.
  • injectors for driving the rotor in rotation distributed irregularly around the periphery of the stator of the turbine.
  • this artificial imbalance creates a non-zero force in a plane perpendicular to the axis of rotation of the turbine. Given its orientation, this force does not hinder the operation of the turbine bearing, whether air or ball.
  • the bearing creates a modulus reaction force equal to that of the centripetal resultant, which guarantees the stability of the entire turbine.
  • the combination of the centripetal resultant and the reaction force is a sufficient damping factor to prevent parasitic oscillations from occurring long enough to be disruptive.
  • the device of FIG. 1 comprises a spray bowl 1 supplied with coating product by an injector 2 and with solvent by a second injector 3. It is rotated by a rotor 4 which rests on an air bearing 5 created between the rotor and a stator 6.
  • the air bearing 5 is supplied by a duct 7 connected to an air source, not shown.
  • the rotor is driven in rotation by the aerodynamic forces induced on its blades 11 by air exiting from several injectors 12 supplied by an annular distribution chamber 13.
  • a duct 14 connects the distribution chamber 13 to a non-air source shown, through regulation means not shown.
  • the air injectors 12 a , 12 b , 12 c and 12 d are not evenly distributed in the stator 6 around the rotor 4. As a result, the centripetal result of the aerodynamic forces is not zero.
  • the injectors 12 could also be fixed in a part of the body of the turbine different from the stator, such as an external housing.
  • the angles between the injectors 12 b and 12 c on the one hand and between the injectors 12 c and 12 d on the other are less than those between the injectors 12 a and 12 b on the one hand and 12 a and 12 d d 'somewhere else.
  • the injectors have the same flow rate because they are supplied from a common distribution chamber 13 and because they have the same angle of incidence ⁇ with respect to the rotor.
  • the angle of incidence of an injector can be defined as the angle between the jet of air leaving the injector and the straight line passing through the center of rotation ⁇ of the rotor and through the injector.
  • the aerodynamic force F induced is located on the right connecting the centers of the injectors 12 a and 12 c , that is to say perpendicular to the axis XX 'of rotation of the turbine. In this case, it applies to the center ⁇ and is oriented from 12 c to 12 a .
  • This orientation is particularly advantageous in the case of a spraying device keeping a substantially constant orientation, such as for example a rotary spraying device mounted on a reciprocator or a lateral machine. Indeed, the resulting centripetal F then partially compensates for the weight of the rotating system.
  • the resulting centripetal F tends to move the rotor 4 on the side of the injector 12 a , that is to say to offset it relative to the axis XX 'in a position where it is stable.
  • An equal modulus reaction force opposes the resultant F because of the centering effect performed by the magnets 8, 8 ', 9 and 9'.
  • the system is mechanically stable. In other words, thanks to the existence of F, any oscillation will be damped.
  • An important aspect of the invention is that it allows an increase in the efficiency of the turbine. This increase in efficiency makes it possible to rotate the rotor at speeds of several tens of thousands of revolutions at per minute, or even more than 100,000 rpm, while keeping an industrially acceptable air consumption.
  • the device of Figure 3 solves the same problem in another way. Elements similar to those of Figures 1 and 2 have the same reference numerals.
  • the three injectors 112 a , 112 b and 112 d have the same angle of incidence ⁇ relative to the rotor 4.
  • the injector 112 c is normal to the external surface of the rotor 4.
  • the force induced by the outgoing air jet of 112 c is directed towards the center of rotation ⁇ of the rotor.
  • the centripetal resultant F of the aerodynamic forces is also directed in the same direction.
  • each injector 212 a , 212 b , 212 c and 212 d is supplied independently with air by conduits 214 a , 214 b , 214 c and 214 d .
  • Elements similar to those of Figures 1 and 2 have the same reference numerals.
  • the air flows delivered by the conduits 214 are adjustable independently of each other by regulation systems not shown. If they are kept different, the centripetal result F of the aerodynamic forces is not zero.
  • This device has the advantage of being adjustable.
  • By modifying the air flow rates supplied by the conduits 214 it is possible to modify the orientation of the centripetal resultant F in its plane. For example, if the flow rates are higher for the injectors 212 b and 212 c than those of the injectors 212 a and 212 d , the resultant is oriented in the northwest quarter of the rotor 4.
  • the adjustable character of the orientation of the centripetal resultant F is particularly advantageous in the case of a device mounted on a multi-axis robot or on a roof machine. It permanently compensates for the weight of the rotating system according to what has been described for the device in FIG. 2.
  • the invention can result from the combination of the systems presented in FIGS. 2 to 4. It has been shown in Figures 2 to 4 with four injectors but it is applicable with any number of injectors.
  • FIG. 5 is a mechanical modeling of a device according to the prior art.
  • the shaft of the rotating system is represented by a mass M which is supported by four identical springs 311, 312, 313 and 314. Any excitation force in the plane of the springs generates an undamped movement.
  • the mass M is quickly stabilized because the restoring forces of the identical springs 411, 412, 413 and 414 combine to move M towards the point of attachment of the spring 413.
  • Another modeling of the invention could consist of a figure identical to FIG. 5 in which the springs do not all have the same stiffness constant.
  • the invention applies equally to devices for spraying liquid coating product or in powder form. It relates to both air bearing and ball bearing turbine devices.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Nozzles (AREA)

Abstract

The applicator consists of an atomising bowl which is turned by the rotor (4) of an air turbine equipped with air injectors to drive the rotor; it also incorporates a system to ensure that the centripetal resultant of the aerodynamic forces produced by the air jets is other than zero. The air injectors (12a-d) are spaced at unequal intervals round the rotor, and at least one of the injectors is directed towards the rotor at a different angle of incidence to the others. The air flows from the injectors are not equal, and the position of the centripetal force resultant is adjustable. The injectors are fed by separately controlled tubes, and the turbine can have air vanes and magnetic centring.

Description

L'invention concerne un dispositif de projection de produit de revêtement, liquide ou sous forme pulvérulente, comprenant un bol de pulvérisation. Elle concerne plus particulièrement le système d'entraînement en rotation du bol de pulvérisation par le rotor d'une turbine à air.The invention relates to a device for spraying coating product, liquid or in powder form, comprising a spray bowl. It relates more particularly to the system for rotating the spray bowl by the rotor of an air turbine.

Dans les dispositifs de l'Art antérieur, une des préoccupations essentielles de l'homme du métier est d'équilibrer le mieux possible le système tournant, c'est-à-dire le rotor et le bol de pulvérisation. On s'efforce de plus d'équilibrer les forces appliquées sur ce système, en particulier au niveau des forces aérodynamiques induites sur le rotor.In the devices of the prior art, one of the essential concerns of those skilled in the art is to balance the rotating system as well as possible, that is to say the rotor and the spray bowl. An effort is also made to balance the forces applied to this system, in particular at the level of the aerodynamic forces induced on the rotor.

Or, aucun système n'étant parfait, le bol de pulvérisation et/ou le rotor ont nécessairement un balourd, si léger soit-il, ce qui implique un moment d'inertie non nul par rapport à l'axe de rotation de la turbine.However, no system being perfect, the spray bowl and / or the rotor necessarily have an unbalance, however light it may be, which implies a non-zero moment of inertia relative to the axis of rotation of the turbine. .

Ce moment d'inertie a tendance à créer des mouvements parasites d'oscillation perpendiculaires à l'axe de rotation de la turbine. Comme on a tenté de minimiser la résultante des forces appliquées au rotor, ces oscillations sont très faiblement amorties, et des vibrations parasites subsistent quasi en permanence.This moment of inertia tends to create parasitic oscillation movements perpendicular to the axis of rotation of the turbine. As an attempt has been made to minimize the result of the forces applied to the rotor, these oscillations are very slightly damped, and parasitic vibrations remain almost permanently.

De plus, les dispositifs de projection de produit de revêtement sont souvent montés sur un robot, du type réciprocateur, machine latérale, machine de toit ou robot multi-axe. Les mouvements générés par ces robots entraînent des accélérations de la turbine perpendiculairement à son axe de rotation, ce qui crée des oscillations parasites qui ne sont pas amorties et perdurent.In addition, the coating product projection devices are often mounted on a robot, of the reciprocating type, lateral machine, roof machine or multi-axis robot. The movements generated by these robots cause accelerations of the turbine perpendicular to its axis of rotation, which creates parasitic oscillations which are not damped and last.

Ces oscillations ou vibrations peuvent être assez fortes pour perturber la répartition de produit de revêtement à la sortie du bol de pulvérisation. Elles diminuent sensiblement le rendement de la turbine. Dans le cas d'une turbine à air, elles peuvent, en outre, déséquilibrer suffisamment le rotor pour que celui-ci comprime le palier à air et heurte le stator, ce qui peut détruire la turbine.These oscillations or vibrations can be strong enough to disturb the distribution of coating product at the outlet of the spray bowl. They significantly reduce the efficiency of the turbine. In the case of an air turbine, they can also unbalance the rotor enough for it to compress the air bearing and strike the stator, which can destroy the turbine.

L'invention résout l'ensemble de ces problèmes.The invention solves all of these problems.

Elle concerne un dispositif de projection de produit de revêtement comprenant un bol de pulvérisation entraîné en rotation par le rotor d'une turbine à air caractérisé en ce que des moyens sont prévus pour que la résultante centripète des forces aérodynamiques induites par les jets d'air d'entraînement en rotation sur le rotor soit non nulle.It relates to a coating product projection device comprising a spray bowl driven in rotation by the rotor of an air turbine, characterized in that means are provided so that the resulting centripetal aerodynamic forces induced by the air jets rotational drive on the rotor is not zero.

Les moyens permettant de réaliser l'invention sont, par exemple, des injecteurs d'air d'entraînement en rotation du rotor répartis de façon non régulière à la périphérie du stator de la turbine. On peut aussi prévoir des injecteurs ayant des angles d'incidence sur le rotor différents les uns par rapport aux autres. Il peut aussi s'agir d'injecteurs ayant des débits différents.The means making it possible to carry out the invention are, for example, injectors for driving the rotor in rotation, distributed irregularly around the periphery of the stator of the turbine. One can also provide injectors having angles of incidence on the rotor different from each other. It can also be injectors with different flow rates.

La résultante radiale des forces aérodynamiques induites par les jets d'air d'entraînement en rotation sur ledit rotor entraîne le rotor en rotation.The radial result of the aerodynamic forces induced by the rotational drive air jets on said rotor drives the rotor in rotation.

Dans tous les cas, ce déséquilibre artificiel crée une force non nulle dans un plan perpendiculaire à l'axe de rotation de la turbine. Etant donné son orientation, cette force ne contrarie en rien le fonctionnement du palier de la turbine, qu'il soit à air ou à billes. Par contre, le palier crée une force de réaction de module égal à celui de la résultante centripète, ce qui garantit la stabilité de l'ensemble de la turbine.In all cases, this artificial imbalance creates a non-zero force in a plane perpendicular to the axis of rotation of the turbine. Given its orientation, this force does not hinder the operation of the turbine bearing, whether air or ball. On the other hand, the bearing creates a modulus reaction force equal to that of the centripetal resultant, which guarantees the stability of the entire turbine.

La combinaison de la résultante centripète et de la force de réaction est un facteur d'amortissement suffisant pour empêcher les oscillations parasites de se manifester assez longtemps pour être perturbatrices.The combination of the centripetal resultant and the reaction force is a sufficient damping factor to prevent parasitic oscillations from occurring long enough to be disruptive.

Grâce à l'invention, on a créé un système mécanique stable qui, même s'il est perturbé, retrouve de lui-même sa position d'équilibre.Thanks to the invention, a stable mechanical system has been created which, even if disturbed, returns to its equilibrium position by itself.

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 trois modes de réalisation de dispositifs de projection de produit de revêtement conformes à son principe et de deux modèles mécaniques de dispositifs de projection, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels:

  • la figure 1 est une vue schématique partielle en coupe d'un dispositif selon l'invention;
  • la figure 2 est une vue schématique partielle en coupe dans la direction AA de la figure 1;
  • la figure 3 est une vue schématique partielle en coupe, similaire à la figure 2 d'un second mode de réalisation de l'invention;
  • la figure 4 est une vue schématique partielle en coupe, similaire à la figure 2 d'un troisième mode de réalisation de l'invention;
  • la figure 5 est une modélisation mécanique d'un dispositif selon l'Art antérieur; et
  • la figure 6 est une modélisation mécanique d'un dispositif selon l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of three embodiments of devices for spraying coating product. in accordance with its principle and two mechanical models of projection devices, given only by way of example and made with reference to the accompanying drawings in which:
  • Figure 1 is a partial schematic sectional view of a device according to the invention;
  • Figure 2 is a partial schematic sectional view in the direction AA of Figure 1;
  • Figure 3 is a partial schematic sectional view, similar to Figure 2 of a second embodiment of the invention;
  • Figure 4 is a partial schematic sectional view, similar to Figure 2 of a third embodiment of the invention;
  • FIG. 5 is a mechanical modeling of a device according to the prior art; and
  • FIG. 6 is a mechanical modeling of a device according to the invention.

Le dispositif de la figure 1 comprend un bol 1 de pulvérisation alimenté en produit de revêtement par un injecteur 2 et en solvant par un second injecteur 3. Il est entraîné en rotation par un rotor 4 qui repose sur un palier à air 5 créé entre le rotor et un stator 6. Le palier à air 5 est alimenté par un conduit 7 relié à une source d'air non représentée. Plusieurs aimants 8, 8' et 9, 9' assurent le centrage du rotor par rapport au stator.The device of FIG. 1 comprises a spray bowl 1 supplied with coating product by an injector 2 and with solvent by a second injector 3. It is rotated by a rotor 4 which rests on an air bearing 5 created between the rotor and a stator 6. The air bearing 5 is supplied by a duct 7 connected to an air source, not shown. Several magnets 8, 8 'and 9, 9' ensure the centering of the rotor relative to the stator.

Le rotor est entraîné en rotation par les forces aérodynamiques induites sur ses pales 11 par de l'air sortant de plusieurs injecteurs 12 alimentés par une chambre de répartition annulaire 13. Un conduit 14 relie la chambre de répartition 13 à une source d'air non représentée, à travers des moyens de régulation non représentés.The rotor is driven in rotation by the aerodynamic forces induced on its blades 11 by air exiting from several injectors 12 supplied by an annular distribution chamber 13. A duct 14 connects the distribution chamber 13 to a non-air source shown, through regulation means not shown.

Comme il est apparent sur la figure 2, les injecteurs d'air 12a, 12b, 12c et 12d ne sont pas équi-répartis dans le stator 6 autour du rotor 4. De ce fait, la résultante centripète des forces aérodynamiques est non nulle. Les injecteurs 12 pourraient aussi être fixés dans une partie du corps de la turbine différente du stator, telle qu'un boîtier externe.As is apparent in Figure 2, the air injectors 12 a , 12 b , 12 c and 12 d are not evenly distributed in the stator 6 around the rotor 4. As a result, the centripetal result of the aerodynamic forces is not zero. The injectors 12 could also be fixed in a part of the body of the turbine different from the stator, such as an external housing.

Les angles entre les injecteurs 12b et 12c d'une part et entre les injecteurs 12c et 12d d'autre part sont inférieurs à ceux entre les injecteurs 12a et 12b d'une part et 12a et 12d d'autre part. Les injecteurs ont un même débit car ils sont alimentés à partir d'une chambre de répartition commune 13 et car ils ont un même angle d'incidence ϑ par rapport au rotor. L'angle d'incidence d'un injecteur peut être défini comme étant l'angle entre le jet d'air sortant de l'injecteur et la droite passant par le centre de rotation ○ du rotor et par l'injecteur. De ceci, il ressort que la force aérodynamique F induite est située sur la droite reliant les centres des injecteurs 12a et 12c, c'est-à-dire perpendiculaire à l'axe XX' de rotation de la turbine. Dans ce cas, elle s'applique au centre ○ et est orientée de 12c vers 12a.The angles between the injectors 12 b and 12 c on the one hand and between the injectors 12 c and 12 d on the other are less than those between the injectors 12 a and 12 b on the one hand and 12 a and 12 d d 'somewhere else. The injectors have the same flow rate because they are supplied from a common distribution chamber 13 and because they have the same angle of incidence ϑ with respect to the rotor. The angle of incidence of an injector can be defined as the angle between the jet of air leaving the injector and the straight line passing through the center of rotation ○ of the rotor and through the injector. From this, it appears that the aerodynamic force F induced is located on the right connecting the centers of the injectors 12 a and 12 c , that is to say perpendicular to the axis XX 'of rotation of the turbine. In this case, it applies to the center ○ and is oriented from 12 c to 12 a .

Cette orientation est particulièrement avantageuse dans le cas d'un dispositif de pulvérisation gardant une orientation sensiblement constante, tel que par exemple un dispositif de pulvérisation rotatif monté sur un réciprocateur ou une machine latérale. En effet, la résultante centripète F compense alors en partie le poids du système tournant.This orientation is particularly advantageous in the case of a spraying device keeping a substantially constant orientation, such as for example a rotary spraying device mounted on a reciprocator or a lateral machine. Indeed, the resulting centripetal F then partially compensates for the weight of the rotating system.

La résultante centripète F a tendance à déplacer le rotor 4 du côté de l'injecteur 12a, c'est-à-dire à le décaler par rapport à l'axe XX' dans une position où il est stable. Une force de réaction de module égale s'oppose à la résultante F à cause du centrage effectué par les aimants 8, 8', 9 et 9'. Le système est mécaniquement stable. En d'autres termes, grâce à l'existence de F, toute oscillation sera amortie.The resulting centripetal F tends to move the rotor 4 on the side of the injector 12 a , that is to say to offset it relative to the axis XX 'in a position where it is stable. An equal modulus reaction force opposes the resultant F because of the centering effect performed by the magnets 8, 8 ', 9 and 9'. The system is mechanically stable. In other words, thanks to the existence of F, any oscillation will be damped.

Un aspect important de l'invention est qu'elle permet une augmentation du rendement de la turbine. Cette augmentation de rendement permet de faire tourner le rotor à des vitesses de plusieurs dizaines de milliers de tours à la minute, voire de plus de 100 000 tr/mn, tout en gardant une consommation d'air industriellement acceptable.An important aspect of the invention is that it allows an increase in the efficiency of the turbine. This increase in efficiency makes it possible to rotate the rotor at speeds of several tens of thousands of revolutions at per minute, or even more than 100,000 rpm, while keeping an industrially acceptable air consumption.

Le dispositif de la figure 3 résout le même problème d'une autre manière. Les éléments similaires à ceux des figures 1 et 2 portent les mêmes références numériques. Les trois injecteurs 112a, 112b et 112d ont le même angle d'incidence ϑ par rapport au rotor 4. L'injecteur 112c est normal à la surface externe du rotor 4. La force induite par le jet d'air sortant de 112c est dirigée vers le centre de rotation ○ du rotor. La résultante centripète F des forces aérodynamiques est elle aussi dirigée dans la même direction.The device of Figure 3 solves the same problem in another way. Elements similar to those of Figures 1 and 2 have the same reference numerals. The three injectors 112 a , 112 b and 112 d have the same angle of incidence ϑ relative to the rotor 4. The injector 112 c is normal to the external surface of the rotor 4. The force induced by the outgoing air jet of 112 c is directed towards the center of rotation ○ of the rotor. The centripetal resultant F of the aerodynamic forces is also directed in the same direction.

Le dispositif de la figure 4 diffère des deux précédentes en ce que chaque injecteur 212a, 212b, 212c et 212d est alimenté indépendamment en air par des conduits 214a, 214b, 214c et 214d. Les éléments similaires à ceux des figures 1 et 2 portent les mêmes références numériques. Les débits d'air délivrés par les conduits 214 sont réglables indépendamment les uns des autres par des systèmes de régulation non représentés. Si on les maintient différents, la résultante centripète F des forces aérodynamiques est non nulle. Ce dispositif présente l'avantage d'être réglable. En modifiant les débits d'air fournis par les conduits 214, on peut modifier l'orientation de la résultante centripète F dans son plan. Par exemple, si les débits sont supérieurs pour les injecteurs 212b et 212c à ceux des injecteurs 212a et 212d, la résultante est orientée dans le quart nord-ouest du rotor 4.The device of FIG. 4 differs from the previous two in that each injector 212 a , 212 b , 212 c and 212 d is supplied independently with air by conduits 214 a , 214 b , 214 c and 214 d . Elements similar to those of Figures 1 and 2 have the same reference numerals. The air flows delivered by the conduits 214 are adjustable independently of each other by regulation systems not shown. If they are kept different, the centripetal result F of the aerodynamic forces is not zero. This device has the advantage of being adjustable. By modifying the air flow rates supplied by the conduits 214, it is possible to modify the orientation of the centripetal resultant F in its plane. For example, if the flow rates are higher for the injectors 212 b and 212 c than those of the injectors 212 a and 212 d , the resultant is oriented in the northwest quarter of the rotor 4.

Le caractère réglable de l'orientation de la résultante centripète F est particulièrement avantageux dans le cas d'un dispositif monté sur un robot multi-axe ou sur une machine de toit. Il permet de compenser en permanence le poids du système tournant selon ce qui a été décrit pour le dispositif de la figure 2.The adjustable character of the orientation of the centripetal resultant F is particularly advantageous in the case of a device mounted on a multi-axis robot or on a roof machine. It permanently compensates for the weight of the rotating system according to what has been described for the device in FIG. 2.

L'invention peut résulter de la combinaison des systèmes présentés aux figures 2 à 4. Elle a été représentée dans les figures 2 à 4 avec quatre injecteurs mais elle est applicable avec n'importe quel nombre d'injecteurs.The invention can result from the combination of the systems presented in FIGS. 2 to 4. It has been shown in Figures 2 to 4 with four injectors but it is applicable with any number of injectors.

La figure 5 est une modélisation mécanique d'un dispositif selon l'Art antérieur. L'arbre du système tournant est représenté par une masse M qui est supportée par quatre ressorts identiques 311, 312, 313 et 314. N'importe quelle force excitatrice dans le plan des ressorts génère un mouvement non amorti. Au contraire, dans le modèle de la figure 6, la masse M est rapidement stabilisée car les forces de rappel des ressorts identiques 411, 412, 413 et 414 se combinent pour déplacer M vers le point d'attache du ressort 413.FIG. 5 is a mechanical modeling of a device according to the prior art. The shaft of the rotating system is represented by a mass M which is supported by four identical springs 311, 312, 313 and 314. Any excitation force in the plane of the springs generates an undamped movement. On the contrary, in the model of FIG. 6, the mass M is quickly stabilized because the restoring forces of the identical springs 411, 412, 413 and 414 combine to move M towards the point of attachment of the spring 413.

Une autre modélisation de l'invention pourrait consister en une figure identique à la figure 5 dans laquelle les ressorts n'auraient pas tous la même constante de raideur.Another modeling of the invention could consist of a figure identical to FIG. 5 in which the springs do not all have the same stiffness constant.

L'invention s'applique indifféremment à des dispositifs de projection de produit de revêtement liquide ou sous forme pulvérulente. Elle concerne à la fois les dispositifs à turbine à palier à air ou à palier à billes.The invention applies equally to devices for spraying liquid coating product or in powder form. It relates to both air bearing and ball bearing turbine devices.

Claims (9)

Dispositif de projection de produit de revêtement comprenant un bol (1) de pulvérisation entraîné en rotation par le rotor (4) d'une turbine à air munie d'injecteurs d'air d'entraînement dudit rotor, caractérisé en ce que des moyens (12, 112, 212) sont prévus pour que la résultante centripète (F) des forces aérodynamiques induites par les jets d'air d'entraînement en rotation sur ledit rotor (4) soit non nulle.Coating product projection device comprising a spray bowl (1) driven in rotation by the rotor (4) of an air turbine fitted with air injectors driving said rotor, characterized in that means ( 12, 112, 212) are provided so that the centripetal resultant (F) of the aerodynamic forces induced by the jets of driving air in rotation on said rotor (4) is not zero. Dispositif selon la revendication 1, caractérisé en ce que les injecteurs (12) d'air d'entraînement en rotation du rotor (4) de ladite turbine sont répartis de manière non régulière autour dudit rotor.Device according to claim 1, characterized in that the injectors (12) for driving the rotor (4) in rotation of said turbine are distributed in an irregular manner around said rotor. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'au moins un injecteur (112c) d'air d'entraînement en rotation du rotor (4) de ladite turbine a un angle (ϑ) d'incidence sur le rotor différent de celui des autres.Device according to claim 1 or 2, characterized in that at least one injector (112 c ) of air for driving the rotor (4) in rotation of said turbine has a different angle (ϑ) of incidence on the rotor from that of others. Dispositif selon l'une des revendications précédentes, caractérisé en ce que les débits d'air des injecteurs (212) d'air d'entraînement en rotation du rotor de ladite turbine ne sont pas tous égaux.Device according to one of the preceding claims, characterized in that the air flows of the injectors (212) for driving the rotor of said turbine in rotation are not all equal. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'orientation de la résultante centripète (F) des forces aérodynamiques induites par les jets d'air (12, 112, 212) d'entraînement en rotation sur ledit rotor dans le plan perpendiculaire à l'axe (XX') de rotation de la turbine est réglable.Device according to one of the preceding claims, characterized in that the orientation of the centripetal resultant (F) of the aerodynamic forces induced by the air jets (12, 112, 212) for driving in rotation on said rotor in the plane perpendicular to the axis (XX ') of rotation of the turbine is adjustable. Dispositif selon la revendication 5, caractérisé en ce que des injecteurs (212) sont alimentés par des conduits spécifiques d'alimentation en air, les débits d'air dans ces conduits étant réglables indépendamment.Device according to claim 5, characterized in that injectors (212) are supplied by specific air supply ducts, the air flows in these ducts being independently adjustable. Dispositif selon la revendication 1, caractérisé en ce que ladite résultante (F) est dirigée vers le haut.Device according to claim 1, characterized in that said resultant (F) is directed upwards. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la turbine est à palier à air (5).Device according to one of the preceding claims, characterized in that the turbine has an air bearing (5). Dispositif selon la revendication 8, caractérisé en ce que la turbine est à centrage magnétique.Device according to claim 8, characterized in that the turbine is magnetically centered.
EP94403026A 1994-01-07 1994-12-27 Apparatus for projecting a coating product with a spraying cup Expired - Lifetime EP0662349B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9400128A FR2714852B1 (en) 1994-01-07 1994-01-07 Coating product projection device comprising a spray bowl.
FR9400128 1994-01-07

Publications (2)

Publication Number Publication Date
EP0662349A1 true EP0662349A1 (en) 1995-07-12
EP0662349B1 EP0662349B1 (en) 1998-07-08

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EP94403026A Expired - Lifetime EP0662349B1 (en) 1994-01-07 1994-12-27 Apparatus for projecting a coating product with a spraying cup

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EP (1) EP0662349B1 (en)
DE (1) DE69411527T2 (en)
ES (1) ES2119118T3 (en)
FR (1) FR2714852B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818244A1 (en) * 1996-07-10 1998-01-14 Sames S.A. Magnetofluidic suspension system for a turbine
FR2805182A1 (en) * 2000-02-21 2001-08-24 Sames Sa COATING PRODUCT SPRAYING DEVICE COMPRISING A ROTATING SPRAYING ELEMENT

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1002596A (en) * 1961-07-22 1965-08-25 Andre Lucien Laurent Brunel Silent high speed air turbines
US3350061A (en) * 1964-04-15 1967-10-31 Linde Ag Expansion-turbine nozzle ring and apparatus incorporating same
GB2105413A (en) * 1981-09-01 1983-03-23 Black & Decker Inc Turbine-driven sander housing having a noise reduction system
US4700896A (en) * 1986-04-11 1987-10-20 Toyota Jidosha Kabushiki Kaisha Rotary type electrostatic spray painting device
GB2193447A (en) * 1986-07-18 1988-02-10 Ohgi Paint Trading Co Ltd Electrostatic spray coating apparatus
EP0567436A1 (en) * 1992-04-23 1993-10-27 E. Fischer Ag Sfi-Schleifspindelfabrik A spray painting nozzle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1002596A (en) * 1961-07-22 1965-08-25 Andre Lucien Laurent Brunel Silent high speed air turbines
US3350061A (en) * 1964-04-15 1967-10-31 Linde Ag Expansion-turbine nozzle ring and apparatus incorporating same
GB2105413A (en) * 1981-09-01 1983-03-23 Black & Decker Inc Turbine-driven sander housing having a noise reduction system
US4700896A (en) * 1986-04-11 1987-10-20 Toyota Jidosha Kabushiki Kaisha Rotary type electrostatic spray painting device
GB2193447A (en) * 1986-07-18 1988-02-10 Ohgi Paint Trading Co Ltd Electrostatic spray coating apparatus
EP0567436A1 (en) * 1992-04-23 1993-10-27 E. Fischer Ag Sfi-Schleifspindelfabrik A spray painting nozzle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818244A1 (en) * 1996-07-10 1998-01-14 Sames S.A. Magnetofluidic suspension system for a turbine
FR2751028A1 (en) * 1996-07-10 1998-01-16 Sames Sa MAGNETOFLUIDIC SUSPENSION TURBINE
US5893517A (en) * 1996-07-10 1999-04-13 Sames, S.A. Magnetofluidic suspension turbine
FR2805182A1 (en) * 2000-02-21 2001-08-24 Sames Sa COATING PRODUCT SPRAYING DEVICE COMPRISING A ROTATING SPRAYING ELEMENT
WO2001062396A1 (en) * 2000-02-21 2001-08-30 Sames Technologies Device for spraying a coating product and spraying rotary element for same
US6592054B2 (en) 2000-02-21 2003-07-15 Sames S.A. Device for spraying coating product and rotating spray element for such a device
KR100717612B1 (en) * 2000-02-21 2007-05-15 싸므 테크놀로지 Device for spraying a coating product and spraying rotary element for same

Also Published As

Publication number Publication date
FR2714852B1 (en) 1996-04-05
DE69411527T2 (en) 1999-03-11
DE69411527D1 (en) 1998-08-13
EP0662349B1 (en) 1998-07-08
FR2714852A1 (en) 1995-07-13
ES2119118T3 (en) 1998-10-01

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