EP1419854A1 - Control piece and distributor for abrasive material feeding into a machine with a throwing wheel and its use - Google Patents

Control piece and distributor for abrasive material feeding into a machine with a throwing wheel and its use Download PDF

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Publication number
EP1419854A1
EP1419854A1 EP03447269A EP03447269A EP1419854A1 EP 1419854 A1 EP1419854 A1 EP 1419854A1 EP 03447269 A EP03447269 A EP 03447269A EP 03447269 A EP03447269 A EP 03447269A EP 1419854 A1 EP1419854 A1 EP 1419854A1
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EP
European Patent Office
Prior art keywords
bars
distributor
control piece
turbine
blocks
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Granted
Application number
EP03447269A
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German (de)
French (fr)
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EP1419854B1 (en
Inventor
Léon Rutten
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RUTTEN SA
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RUTTEN SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B24C5/068—Transferring the abrasive particles from the feeding means onto the propeller blades, e.g. using central impellers

Definitions

  • the present invention relates to the couple "control piece and distributor" of centrifugal blasting turbine, as well as each of the elements constituting said couple.
  • Centrifugal blasting turbines include pallets mounted on between rotary and integral plates, and are associated in known manner with a piece of fixed control, and to a rotary distributor or impeller.
  • the distributor or impeller
  • the control room surrounds this distributor. It is fixed in space but angularly adjustable to fix the direction of the shot of shot. It is well known that the parts in contact with the pellets are subject to significant abrasion.
  • the present invention relates to a couple "control piece and distributor" for centrifugal blasting turbine, and in particular an element of this couple.
  • the control part and / or the distributor is made of composite materials.
  • the invention therefore consists in the production of control parts and / or distributors comprising on the one hand a support, advantageously made of treated steel, and on the other hand one or more removable and replaceable wearing parts, in particular made of alloys very hard, such as an alloy with exceptional resistance to wear.
  • the wear part or parts will advantageously be suitably positioned in the control parts and / or in the dispensers to ensure good wear resistance of the support during their use.
  • An examination of conventional control parts and distributors, in treated steel shows that some areas of these parts are heavily worn, while other areas remain almost intact.
  • An object of the invention is therefore to produce pairs of parts (control parts and distributors) or part of this pair (control parts or distributor) in materials composed on the one hand of a support (advantageously steel, preferably in treated steel) and on the other hand one or more removable and replaceable wear parts, advantageously made of alloys with very high hardness, the wear part (s) being able to be advantageously replaced or repositioned (for example after turning over) to make refurbished or recycled control parts and / or distributors.
  • the supports of these control parts and / or distributors would thus be intact or almost intact, and the wearing parts actually subject to wear would be replaced or repositioned. This way of constructing control parts and distributors thus makes it possible to considerably increase their life, while offering a quick, profitable and economical solution to ensure good resistance to wear in one or more areas subject to wear.
  • the invention therefore relates to an element of a shot feed device for a centrifugal shot blasting turbine, said element comprising at least one support advantageously of treated steel and one or more removable and replaceable wear parts, connected or attached to said support.
  • the subject of the invention is a control piece for supplying pellets for a centrifugal shot blasting turbine - FIG. 1, as well as the constituent elements of this piece.
  • the control part (FIG. 1) comprises a body (support) defining a central chamber intended to receive a rotary distributor, said chamber having a substantially cylindrical inner face.
  • the body has a window controlling the passage of shot ( Figures 2 and 3) from the central chamber or from the rotary distributor 2 towards the radial turbine, said window having a start edge for exhausting shot in the turbine and an end edge. exhaust shot in the turbine.
  • the control piece according to the invention is advantageously characterized in that it is provided with at least one series of bars made of a material having an abrasion resistance greater than that of the material used for the body, said bars forming at least partial protection of the end of distribution exhaust end and / or of a part of the substantially cylindrical internal face adjacent to the end of exhaust edge. Said thus advantageously form at least partial protection of the cylindrical inner surface of the control piece, in particular from the distribution exhaust to the exhaust end edge.
  • control piece is provided with a series of axial bars arranged next to each other, said bars forming edge protection distribution exhaust end and at least part of the interior substantially cylindrical adjacent to the exhaust end edge.
  • the control piece advantageously cooperates with a rotary distributor 2 having a series of radial passages, said passages having a width axial.
  • Axial bars arranged next to each other form advantageously a portion of polygonal surface close to a cylindrical surface or circle and advantageously offer protection of the part of the inner face, over a width at least equal to the axial width of the radial passages of the distributor 2.
  • control piece is provided with a series of axial bars placed next to each other and forming a protection of the inner surface between the exhaust end edge and the start edge exhaust or an area adjacent to that edge.
  • the body has at least one recess in which the bars are placed.
  • the body has at least one groove intended to receive one end bars, preferably two grooves arranged one relative to the other of so that a first groove is adapted to receive a first end of the bars, while the other groove is adapted to receive the other end of the bars.
  • the body has two parts capable of being separated from each other for the placement of bars, and at least one means of joining of the parts in a position close to each other.
  • the bars advantageously have a polygonal cross section, advantageously substantially square or substantially rectangular or trapezoidal, between 2 and 15mm in height and between 2 and 20mm in width.
  • a cylindrical bar section could also be suitable but this is much less efficient than a square, rectangular or trapezoidal section.
  • the surface created by the bars must be brought together as advantageously as possible part of a cylindrical surface.
  • the bars are preferably made of tungsten carbide or other alloys ultra hard offering exceptional resistance to wear (nitride, ceramic, etc.).
  • one or more bars partially close the window and serve as a means of controlling the opening of the window.
  • the subject of the invention is also a system for admitting shot for a centrifugal blasting turbine, said system comprising at least one piece of control according to the invention and a distributor intended to be mounted rotatable relative to the control piece, said distributor having a series of arms arranged at near the inside of the control room.
  • the distributor arms consist of blocks made of a material having an abrasion resistance at least substantially equal to the protection bars of the control room.
  • the dispenser comprises a tray, a crown, a series of blocks intended to be placed between the tray and the crown, and a series of means for securing the crown to the plate and for securing the crown and / or tray blocks.
  • the blocks have an axial passage or hole intended to receive a stem or an element used to secure the crown to the tray.
  • the tray and / or the crown have recesses for receiving the end of the blocks.
  • the invention therefore also relates to a block distributor as described above.
  • the invention also relates to a centrifugal blasting turbine comprising a system according to the invention, and a blasting method in which a turbine according to the invention is used.
  • a centrifugal blasting turbine comprising a system according to the invention, and a blasting method in which a turbine according to the invention is used.
  • the supply system shown in Figure 1 includes a control piece 1 and a distributor 2, the latter being movable relative to the control part 1.
  • the distributor 2 is for example mounted on the shaft of a motor driving in rotation the centrifugal blasting turbine (not shown).
  • a feed chute 3 leads the shot to the center of the distributor 2.
  • the shot is centrifuged by the arms 20 of the distributor and ejected by the light 5 from the control piece 1.
  • the shot coming out of the light 5 is then picked up by the turbine which thus accelerates until the turbine is ejected, at the diameter outside of it.
  • the control piece 1 comprises a body 1A defining a central chamber 4 intended to receive a rotary distributor 2, said chamber 4 having a face interior 4A substantially cylindrical.
  • This body 1A has a window 5 controlling the passage of shot from the central chamber 4 or from the rotary distributor 2 to the radial or centrifugal turbine.
  • Window 5 has a start edge exhaust 5A shots in the turbine and an exhaust end edge 5B pellets in the turbine.
  • the control piece 1 is provided with at least one series of bars 6 made of a material having an abrasion resistance greater than that of the material used for the body 1A, said bars forming a protection from the end of the supply exhaust end 5B and / or from a portion of the substantially cylindrical inner face adjacent to the end of the exhaust exhaust 5B.
  • the control piece 1 is provided with a series of axial bars 6 (bars whose axis is substantially parallel to the axis of rotation A of the distributor or of the centrifugal turbine) placed one next to the other and forming a protection of the interior surface between the exhaust end edge 5B and the exhaust start edge 5A or an area adjacent to this edge.
  • the bars 6 have a length L greater than the width L1 of the window 5.
  • the control part 1 comprises two parts 1A and 1B which can be joined to one another by means of bolts 7 or other mechanical systems.
  • Each part 1A, 1B has a groove 8,9 intended to receive an end 6A, 6B of the bars 6. Between the grooves 8,9, a recess 10 is defined in the body, this recess receiving the bars 6.
  • the parts 1A, 1B are separated from one another for the placement of bars 6.
  • the grooves 8, 9 are provided with stops 11 to ensure that the bars do not get not in at least part of window 5.
  • the bars 6 have a polygonal cross section, advantageously substantially square or substantially rectangular or trapezoidal, of height H between 2 and 15mm (for example 3,5,7,8,10 mm) and of width LL included between 2 and 20 mm (for example 3,4,5,6,8,10, 12, 15 mm).
  • the polygonal shape of bars 6, as well as its dimensions, are chosen to obtain a surface substantially cylindrical or corresponding to part of a surface substantially cylindrical. These dimensions are given for information only and depend on the size of the control room.
  • the bars 6 are advantageously made of material or alloy with high hardness, in particular of tungsten carbide or other anti-wear material (nitride, ceramic, etc.). We could also have used bars of hardness similar to that of the body, these bars then being replaced or repositioned (turned) once worn.
  • bars 61 partially close the window 5 and serve as means of controlling the opening of the window 5. These bars 61 define the final exhaust edge 5B of the window (or 5A for the other direction of rotation), an area particularly subject to abrasion due to shot.
  • the stops 11 can be positioned in several different places (for example example in the grooves 8, 9), it is possible to control the length LF of the window 5, that is to say to be able to control the width of the shot blasting.
  • the distributor 2 has a series of arms 20 arranged in the vicinity of the face interior formed by the bars 6 of the control piece 1.
  • the bars 6 have a length L greater than the width Y of the openings 21 of the distributor 2, these openings 21 being defined between the arms 20.
  • the arms 20 of the dispenser consist of blocks made of a material having an abrasion resistance at least substantially equal to that of bars 6 for protecting the control piece 1.
  • the distributor 2 comprises a plate 22, a crown 23, a series of blocks 20 intended to be placed between the plate 22 and the crown 23, and a series of bolts 24, means for securing the crown 23 to the plate 22 and to secure the blocks 20 to the crown 23 and to the plate 22.
  • the blocks polygonal cross section has an axial passage or hole 25 intended for receive the stem of a bolt 24 used to secure the crown to the plate.
  • connection of the plate and the crown can thus be achieved by screws and spacers outside the block, on the side opposite the active face. In this case of mounting, only one direction of rotation is allowed, that which prevents the spacers from wear.
  • the plate 22 and the crown 23 have recesses 22A, 23A for receiving the end of the blocks.
  • the blocks have for example a polygonal section (in particular rectangular) with a thickness or height of 5 to 30mm and a greater width of 5 to 25mm, the length being a function of the spacing between the plate and the crown. These dimensions depend on the size of the distributors, they are therefore given as an indication.
  • Another provision of the distributor under the same invention namely making the removable and replaceable wearing parts, is to "style" the arms of the distributor of a jacket for example in the form of L or U made in materials with high wear resistance such as tungsten carbides, nitrides, ceramics, etc. (see figure 6)
  • the blocks, or arms in the case of a cast monobloc distributor for example, are consist of or include two parts, namely the central block (or arm) 20A and the protective jacket 20B.
  • the bottom of the U of the dust jacket is placed on the side interior so that the centrifugal distributor rotates and keeps the jacket in square.
  • FIG. 6 section V-V of a dispenser fitted with a high wear resistance alloy jacket.
  • Figure 6 shows a distributor block 20A (or arm 20A) surrounded by a jacket offering two 20Bis wear faces.
  • the supply device shown in the figures is associated with a turbine shot blasting to make a shot blasting one or more pieces for example in a blasting chamber.
  • This turbine can then be used in a process of shot blasting, in which when replacing one or more worn pallets of the turbine, check and replace the face of worn bars with a face of bars not worn or by an unused side of the bars and / or the worn side of a block by an unused side of a block and / or the worn side of a dust jacket by an unused side a dust jacket.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Supercharger (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The control (1) and dispensing (2) element of a shot supply device for the shot blasting turbine comprises a treated steel support (1A) and removable and replaceable wear parts (6,20) connected to the support. Independent claims are included for a shot inlet system and a method of shot blasting.

Description

La présente invention a pour objet le couple « pièce de contrôle et distributeur » de turbine de grenaillage centrifuge, ainsi que chacun des éléments constituant ledit couple.The present invention relates to the couple "control piece and distributor" of centrifugal blasting turbine, as well as each of the elements constituting said couple.

Les turbines de grenaillage centrifuges comprennent des palettes montées sur entre des plateaux rotatifs et solidaires, et sont associées de manière connue à une pièce de contrôle fixe, et à un distributeur rotatif ou impeller. Le distributeur (ou impeller) est fixé au centre de la turbine et tourne donc avec celle-ci. La pièce de contrôle entoure ce distributeur. Elle est fixe dans l'espace mais réglable angulairement pour fixer la direction du jet de grenaille. Il est bien connu que les pièces en contact avec la grenaille sont soumises à une abrasion importante.Centrifugal blasting turbines include pallets mounted on between rotary and integral plates, and are associated in known manner with a piece of fixed control, and to a rotary distributor or impeller. The distributor (or impeller) is attached to the center of the turbine and therefore rotates with it. The control room surrounds this distributor. It is fixed in space but angularly adjustable to fix the direction of the shot of shot. It is well known that the parts in contact with the pellets are subject to significant abrasion.

Pour répondre à ce problème, il a déjà été proposé de réaliser des palettes et des distributeurs de petite taille réalisés uniquement en un matériau résistant à l'abrasion. La réalisation de pièce de contrôle et de distributeurs de grande taille uniquement en des matériaux de haute résistance à l'abrasion s'est avérée possible, mais à des coûts très importants.To address this problem, it has already been proposed to produce pallets and small dispensers made only from abrasion resistant material. The realization of control room and large distributors only in high abrasion resistance material has proven to be possible, but at cost very important.

Pour tenter de résoudre le problème des pièces de contrôle et distributeurs, on a essayé de traiter thermiquement la face interne de ceux-ci en présence d'agent présentant une haute dureté de manière à former une couche résistante à l'abrasion. Les couches ainsi obtenues se sont avérées présentées un risque de décollement. De plus, le contrôle de la qualité de la couche ainsi obtenue est difficile, voire impossible. Finalement, lorsqu'une partie de la couche est enlevée par abrasion, la pièce de contrôle dans sa totalité doit être remplacée. To try to solve the problem of control parts and distributors, we have tried to heat treat the inner side of these in the presence of agent having a high hardness so as to form an abrasion resistant layer. The layers thus obtained were found to present a risk of delamination. Of more, the quality control of the layer thus obtained is difficult, even impossible. Finally, when part of the layer is removed by abrasion, the entire control piece must be replaced.

La présente invention a pour objet un couple « pièce de contrôle et distributeur » pour turbine de grenaillage centrifuge, et en particulier un élément de ce couple.
Selon l'invention, on réalise la pièce de contrôle et/ou le distributeur en matériaux composites. L'invention consiste donc dans la réalisation de pièces de contrôle et/ou distributeurs comprenant d'une part un support, avantageusement en acier traité, et d'autre part une ou des pièces d'usure amovibles et remplaçables, en particulier réalisées en alliages à très haute dureté, tel qu'un alliage présentant une résistance exceptionnelle à l'usure.
La ou les pièces d'usure seront avantageusement convenablement positionnées dans les pièces de contrôle et/ou dans les distributeurs pour assurer une bonne résistance à l'usure du support lors de leur utilisation.
Un examen de pièces de contrôle et de distributeurs conventionnels, en acier traité, montre que certaines zones de ces pièces sont fortement usées, tandis que d'autres zones restent quasi intactes.
Un objet de l'invention est donc de réaliser des couples de pièces (pièces de contrôle et distributeurs) ou partie de ce couple (pièces de contrôle ou distributeur) en matériaux composés d'une part d'un support (avantageusement en acier, de préférence en acier traité) et d'autre part une ou des pièces d'usure amovibles et remplaçables, avantageusement réalisées en alliages à très haute dureté, la ou les pièces d'usure pouvant être avantageusement remplacées ou repositionnées (par exemple après un retournement) pour réaliser des pièces de contrôle et/ou distributeurs remis à neuf ou recyclés.
Les supports de ces pièces de contrôle et/ou distributeurs seraient ainsi intacts ou quasi intacts, et les pièces d'usure réellement sujettes à l'usure seraient remplacées ou repositionnées. Cette façon de construire les pièces de contrôle et distributeurs permet ainsi d'accroítre considérablement leur vie, tout en offrant une solution rapide, rentable et économique pour assurer une bonne résistance à l'usure dans une ou des zones soumises à l'usure. The present invention relates to a couple "control piece and distributor" for centrifugal blasting turbine, and in particular an element of this couple.
According to the invention, the control part and / or the distributor is made of composite materials. The invention therefore consists in the production of control parts and / or distributors comprising on the one hand a support, advantageously made of treated steel, and on the other hand one or more removable and replaceable wearing parts, in particular made of alloys very hard, such as an alloy with exceptional resistance to wear.
The wear part or parts will advantageously be suitably positioned in the control parts and / or in the dispensers to ensure good wear resistance of the support during their use.
An examination of conventional control parts and distributors, in treated steel, shows that some areas of these parts are heavily worn, while other areas remain almost intact.
An object of the invention is therefore to produce pairs of parts (control parts and distributors) or part of this pair (control parts or distributor) in materials composed on the one hand of a support (advantageously steel, preferably in treated steel) and on the other hand one or more removable and replaceable wear parts, advantageously made of alloys with very high hardness, the wear part (s) being able to be advantageously replaced or repositioned (for example after turning over) to make refurbished or recycled control parts and / or distributors.
The supports of these control parts and / or distributors would thus be intact or almost intact, and the wearing parts actually subject to wear would be replaced or repositioned. This way of constructing control parts and distributors thus makes it possible to considerably increase their life, while offering a quick, profitable and economical solution to ensure good resistance to wear in one or more areas subject to wear.

L'invention a donc pour objet un élément d'un dispositif d'alimentation en grenaille pour une turbine de grenaillage centrifuge, ledit élément comprenant au moins un support avantageusement en acier traité et une ou des pièces d'usure amovibles et remplaçables, reliées ou attachées audit support.
En particulier, l'invention a pour objet une pièce de contrôle pour l'alimentation en grenailles pour une turbine de grenaillage centrifuge - figure 1, ainsi que les éléments constitutifs de cette pièce. La pièce de contrôle (figure 1) comporte un corps (support) définissant une chambre centrale destinée à recevoir un distributeur rotatif, ladite chambre présentant une face intérieure sensiblement cylindrique. Le corps présente une fenêtre contrôlant le passage de grenaille (figures 2 et 3) de la chambre centrale ou du distributeur rotatif 2 vers la turbine radiale, ladite fenêtre présentant un bord de début d'échappement des grenailles dans la turbine et un bord de fin d'échappement de grenailles dans la turbine. La pièce de contrôle suivant l'invention est avantageusement caractérisée en ce qu'elle est munie d'au moins une série de barrettes réalisées en un matériau présentant une résistance à l'abrasion supérieure à celle du matériau utilisé pour le corps, lesdites barrettes formant une protection au moins partielle du bord de fin d'échappement distribution et/ou d'une partie de la face intérieure sensiblement cylindrique adjacente du bord de fin d'échappement. Lesdites forment ainsi avantageusement une protection au moins partielle de la surface intérieure cylindrique de la pièce de contrôle, en particulier depuis l'échappement de distribution jusqu'au bord de fin d'échappement.The invention therefore relates to an element of a shot feed device for a centrifugal shot blasting turbine, said element comprising at least one support advantageously of treated steel and one or more removable and replaceable wear parts, connected or attached to said support.
In particular, the subject of the invention is a control piece for supplying pellets for a centrifugal shot blasting turbine - FIG. 1, as well as the constituent elements of this piece. The control part (FIG. 1) comprises a body (support) defining a central chamber intended to receive a rotary distributor, said chamber having a substantially cylindrical inner face. The body has a window controlling the passage of shot (Figures 2 and 3) from the central chamber or from the rotary distributor 2 towards the radial turbine, said window having a start edge for exhausting shot in the turbine and an end edge. exhaust shot in the turbine. The control piece according to the invention is advantageously characterized in that it is provided with at least one series of bars made of a material having an abrasion resistance greater than that of the material used for the body, said bars forming at least partial protection of the end of distribution exhaust end and / or of a part of the substantially cylindrical internal face adjacent to the end of exhaust edge. Said thus advantageously form at least partial protection of the cylindrical inner surface of the control piece, in particular from the distribution exhaust to the exhaust end edge.

De façon avantageuse, la pièce de contrôle est munie d'une série de barrettes axiales disposées les unes à côté des autres, lesdites barrettes formant une protection du bord de fin d'échappement distribution et au moins d'une partie de la face intérieure sensiblement cylindrique adjacente du bord de fin d'échappement.Advantageously, the control piece is provided with a series of axial bars arranged next to each other, said bars forming edge protection distribution exhaust end and at least part of the interior substantially cylindrical adjacent to the exhaust end edge.

La pièce de contrôle coopère avantageusement avec un distributeur rotatif 2 présentant une série de passages radiaux, lesdits passages présentant une largeur axiale. Des barrettes axiales disposées les unes à côté des autres forment avantageusement une portion de surface polygonale proche d'une surface cylindrique ou cercle et offrent avantageusement une protection de la partie de la face intérieure, sur une largeur au moins égale à la largeur axiale des passages radiaux du distributeur 2.The control piece advantageously cooperates with a rotary distributor 2 having a series of radial passages, said passages having a width axial. Axial bars arranged next to each other form advantageously a portion of polygonal surface close to a cylindrical surface or circle and advantageously offer protection of the part of the inner face, over a width at least equal to the axial width of the radial passages of the distributor 2.

Selon une forme de réalisation préférée, la pièce de contrôle est munie d'une série de barrettes axiales placées les unes à côté des autres et formant une protection de la surface intérieure entre le bord de fin d'échappement et le bord de début d'échappement ou une zone adjacente à ce bord.According to a preferred embodiment, the control piece is provided with a series of axial bars placed next to each other and forming a protection of the inner surface between the exhaust end edge and the start edge exhaust or an area adjacent to that edge.

Pour le placement ou la fixation des barrettes, le corps présente au moins un renfoncement dans lequel sont placées les barrettes.For the placement or fixing of the bars, the body has at least one recess in which the bars are placed.

Par exemple, le corps présente au moins une gorge destinée à recevoir une extrémité des barrettes, de préférence deux gorges agencées l'une par rapport à l'autre de manière à ce qu'une première gorge soit adaptée pour recevoir une première extrémité des barrettes, tandis que l'autre gorge est adaptée pour recevoir l'autre extrémité des barrettes.For example, the body has at least one groove intended to receive one end bars, preferably two grooves arranged one relative to the other of so that a first groove is adapted to receive a first end of the bars, while the other groove is adapted to receive the other end of the bars.

Selon un détail d'une forme de réalisation, le corps comporte deux parties aptes à être écartées l'une de l'autre pour le placement de barrettes, et au moins un moyen de solidarisation des parties dans une position rapprochée l'une de l'autre.According to a detail of an embodiment, the body has two parts capable of being separated from each other for the placement of bars, and at least one means of joining of the parts in a position close to each other.

Les barrettes ont avantageusement une section transversale polygonale, avantageusement sensiblement carrée ou sensiblement rectangulaire ou trapézoïdale, de hauteur comprise entre 2 et 15mm et de largeur comprise entre 2 et 20 mm.The bars advantageously have a polygonal cross section, advantageously substantially square or substantially rectangular or trapezoidal, between 2 and 15mm in height and between 2 and 20mm in width.

Une section de barrette cylindrique pourrait aussi convenir mais celle-ci est beaucoup moins performante qu'une section carrée, rectangulaire ou trapézoïdale. La surface créée par les barrettes doit se rapprocher de manière avantageuse le plus possible d'une partie d'une surface cylindrique.A cylindrical bar section could also be suitable but this is much less efficient than a square, rectangular or trapezoidal section. The surface created by the bars must be brought together as advantageously as possible part of a cylindrical surface.

Les barrettes sont de préférence réalisées en carbure de tungstène ou autres alliages ultra durs offrant une résistance exceptionnelle à l'usure (nitrure, céramique, etc.).The bars are preferably made of tungsten carbide or other alloys ultra hard offering exceptional resistance to wear (nitride, ceramic, etc.).

Selon un détail avantageux d'une forme de réalisation, une ou plusieurs barrettes obturent partiellement la fenêtre et servent de moyens de contrôle de l'ouverture de la fenêtre.According to an advantageous detail of an embodiment, one or more bars partially close the window and serve as a means of controlling the opening of the window.

L'invention a encore pour objet un système d'admission de grenailles pour une turbine de grenaillage centrifuge, ledit système comportant au moins une pièce de contrôle suivant l'invention et un distributeur destiné à être monté rotatif par rapport à la pièce de contrôle, ledit distributeur présentant une série de bras agencés au voisinage de la face intérieure de la pièce de contrôle.The subject of the invention is also a system for admitting shot for a centrifugal blasting turbine, said system comprising at least one piece of control according to the invention and a distributor intended to be mounted rotatable relative to the control piece, said distributor having a series of arms arranged at near the inside of the control room.

De façon avantageuse, les bras du distributeur sont constitués de blochets réalisés en un matériau présentant une résistance à l'abrasion au moins sensiblement égale à celle des barrettes de protection de la pièce de contrôle.Advantageously, the distributor arms consist of blocks made of a material having an abrasion resistance at least substantially equal to the protection bars of the control room.

Selon un détail d'une forme de réalisation, le distributeur comporte un plateau, une couronne, une série de blochets destinés à être placés entre le plateau et la couronne, et une série de moyens pour solidariser la couronne au plateau et pour solidariser les blochets à la couronne et/ou au plateau.According to a detail of an embodiment, the dispenser comprises a tray, a crown, a series of blocks intended to be placed between the tray and the crown, and a series of means for securing the crown to the plate and for securing the crown and / or tray blocks.

En particulier, les blochets présentent un passage ou trou axial destiné à recevoir une tige ou un élément utilisé pour solidariser la couronne au plateau. In particular, the blocks have an axial passage or hole intended to receive a stem or an element used to secure the crown to the tray.

De préférence, le plateau et/ou la couronne présentent des creux pour recevoir l'extrémité des blochets.Preferably, the tray and / or the crown have recesses for receiving the end of the blocks.

L'invention a donc également pour objet un distributeur à blochets tel que décrit ci-avant.The invention therefore also relates to a block distributor as described above.

L'invention a encore pour objet une turbine de grenaillage centrifuge comportant un système suivant l'invention, et un procédé de grenaillage dans lequel on utilise une turbine suivant l'invention.
Dans ce procédé de grenaillage, lors du remplacent d'une ou de palettes usées de la turbine, on contrôle avantageusement et on remplace la face de barrettes usées par une face de barrettes non usées.The invention also relates to a centrifugal blasting turbine comprising a system according to the invention, and a blasting method in which a turbine according to the invention is used.
In this shot peening process, when one or more worn blades of the turbine are replaced, the face of worn bars is advantageously checked and the face of unused bars is replaced.

Des détails et particularités de l'invention ressortiront de la description détaillée suivante d'une forme de réalisation préférée d'un système d'alimentation d'une turbine de grenaillage.Details and particularities of the invention will emerge from the detailed description following of a preferred embodiment of a power supply system blasting turbine.

Dans cette description, il est fait référence aux dessins ci-annexés. Dans ces dessins :

  • la figure 1 est une vue en perspective des pièces constituant un système d'alimentation préférée suivant l'invention ;
  • la figure 2 est une vue en élévation de la pièce de contrôle,
  • la figure 3 est une vue en plan visualisant la lumière de la pièce de contrôle ;
  • les figures 4A et 4B sont des vues en coupe selon les lignes IVA-IVA et IVB-IVB de la pièce de contrôle après enlèvement du distributeur,
  • les figures 5A et 5B sont des vues en coupe selon les lignes IVA-IVA et IVB-IVB du distributeur sorti de la pièce de contrôle,
  • la figure 6 est une vue en coupe d'un distributeur similaire à celle de la figure 5A.
In this description, reference is made to the accompanying drawings. In these drawings:
  • Figure 1 is a perspective view of the parts constituting a preferred supply system according to the invention;
  • FIG. 2 is an elevation view of the control piece,
  • Figure 3 is a plan view showing the light of the control room;
  • FIGS. 4A and 4B are sectional views along lines IVA-IVA and IVB-IVB of the control part after removal of the distributor,
  • FIGS. 5A and 5B are sectional views along lines IVA-IVA and IVB-IVB of the dispenser taken out of the control room,
  • Figure 6 is a sectional view of a dispenser similar to that of Figure 5A.

Le système d'alimentation représenté à la figure 1 comprend une pièce de contrôle 1 et un distributeur 2, ce dernier étant mobile par rapport à la pièce de contrôle 1. Le distributeur 2 est par exemple monté sur l'arbre d'un moteur entraínant en rotation la turbine centrifuge de grenaillage (non représentée).The supply system shown in Figure 1 includes a control piece 1 and a distributor 2, the latter being movable relative to the control part 1. The distributor 2 is for example mounted on the shaft of a motor driving in rotation the centrifugal blasting turbine (not shown).

Une goulotte d'alimentation 3 conduit la grenaille au centre du distributeur 2. La grenaille est centrifugée par les bras 20 du distributeur et éjectée par la lumière 5 de la pièce de contrôle 1. La grenaille sortant de la lumière 5 est alors captée par la turbine qui réalise ainsi son accélération jusqu'à l'éjection de la turbine, au diamètre extérieur de celle-ci.A feed chute 3 leads the shot to the center of the distributor 2. The shot is centrifuged by the arms 20 of the distributor and ejected by the light 5 from the control piece 1. The shot coming out of the light 5 is then picked up by the turbine which thus accelerates until the turbine is ejected, at the diameter outside of it.

La pièce de contrôle 1 comporte un corps 1A définissant une chambre centrale 4 destinée à recevoir un distributeur rotatif 2, ladite chambre 4 présentant une face intérieure 4A sensiblement cylindrique. Ce corps 1A présente une fenêtre 5 contrôlant le passage de grenaille de la chambre centrale 4 ou du distributeur rotatif 2 vers la turbine radiale ou centrifuge. La fenêtre 5 présente un bord de début d'échappement 5A des grenailles dans la turbine et un bord de fin d'échappement 5B de grenailles dans la turbine.The control piece 1 comprises a body 1A defining a central chamber 4 intended to receive a rotary distributor 2, said chamber 4 having a face interior 4A substantially cylindrical. This body 1A has a window 5 controlling the passage of shot from the central chamber 4 or from the rotary distributor 2 to the radial or centrifugal turbine. Window 5 has a start edge exhaust 5A shots in the turbine and an exhaust end edge 5B pellets in the turbine.

Dans la forme de réalisation représentée, la pièce de contrôle 1 est munie d'au moins une série de barrettes 6 réalisées en un matériau présentant une résistance à l'abrasion supérieure à celle du matériau utilisé pour le corps 1A, lesdites barrettes formant une protection du bord de fin d'échappement d'alimentation 5B et/ou d'une partie de la face intérieure sensiblement cylindrique adjacente du bord de fin d'échappement 5B. En fait, dans la forme de réalisation représentée, la pièce de contrôle 1 est munie d'une série de barrettes axiales 6 (barrettes dont l'axe est sensiblement parallèle à l'axe de rotation A du distributeur ou de la turbine centrifuge) placées les unes à côté des autres et formant une protection de la surface intérieure entre le bord de fin d'échappement 5B et le bord de début d'échappement 5A ou une zone adjacente à ce bord.
Les barrettes 6 ont une longueur L supérieure à la largeur L1 de la fenêtre 5.In the embodiment shown, the control piece 1 is provided with at least one series of bars 6 made of a material having an abrasion resistance greater than that of the material used for the body 1A, said bars forming a protection from the end of the supply exhaust end 5B and / or from a portion of the substantially cylindrical inner face adjacent to the end of the exhaust exhaust 5B. In fact, in the embodiment shown, the control piece 1 is provided with a series of axial bars 6 (bars whose axis is substantially parallel to the axis of rotation A of the distributor or of the centrifugal turbine) placed one next to the other and forming a protection of the interior surface between the exhaust end edge 5B and the exhaust start edge 5A or an area adjacent to this edge.
The bars 6 have a length L greater than the width L1 of the window 5.

La pièce de contrôle 1 comporte deux pièces 1A et 1B qui peuvent être solidarisées l'une à l'autre au moyen de boulons 7 ou d'autres systèmes mécaniques. Chaque pièce 1A,1B présente une gorge 8,9 destinée à recevoir une extrémité 6A,6B des barrettes 6. Entre les gorges 8,9, un renfoncement 10 est défini dans le corps, ce renfoncement recevant les barrettes 6.
Les pièces 1A,1B sont écartées l'une de l'autre pour le placement de barrettes 6.The control part 1 comprises two parts 1A and 1B which can be joined to one another by means of bolts 7 or other mechanical systems. Each part 1A, 1B has a groove 8,9 intended to receive an end 6A, 6B of the bars 6. Between the grooves 8,9, a recess 10 is defined in the body, this recess receiving the bars 6.
The parts 1A, 1B are separated from one another for the placement of bars 6.

Les gorges 8,9 sont munies de butées d'arrêt 11 pour assurer que des barrettes ne se situent pas dans au moins une partie de la fenêtre 5.The grooves 8, 9 are provided with stops 11 to ensure that the bars do not get not in at least part of window 5.

Les barrettes 6 ont une section transversale polygonale, avantageusement sensiblement carrée ou sensiblement rectangulaire ou trapézoïdale, de hauteur H comprise entre 2 et 15mm (par exemple 3,5,7,8,10 mm) et de largeur LL comprise entre 2 et 20 mm (par exemple 3,4,5,6,8,10, 12, 15 mm). La forme polygonale des barrettes 6, ainsi que ses dimensions, sont choisies pour obtenir une surface sensiblement cylindrique ou correspondant à une partie d'une surface sensiblement cylindrique. Ces dimensions sont données à titre indicatif et dépendent de la grandeur de la pièce de contrôle.The bars 6 have a polygonal cross section, advantageously substantially square or substantially rectangular or trapezoidal, of height H between 2 and 15mm (for example 3,5,7,8,10 mm) and of width LL included between 2 and 20 mm (for example 3,4,5,6,8,10, 12, 15 mm). The polygonal shape of bars 6, as well as its dimensions, are chosen to obtain a surface substantially cylindrical or corresponding to part of a surface substantially cylindrical. These dimensions are given for information only and depend on the size of the control room.

Les barrettes 6 sont avantageusement réalisées en matériau ou alliage à haute dureté, en particulier en carbure de tungstène ou autre matériau anti-usure (nitrure, céramique, ...).
On aurait également pu utiliser des barrettes de dureté similaire à celle du corps, ces barrettes étant alors remplacées ou repositionnées (retournées) une fois usées. The bars 6 are advantageously made of material or alloy with high hardness, in particular of tungsten carbide or other anti-wear material (nitride, ceramic, etc.).
We could also have used bars of hardness similar to that of the body, these bars then being replaced or repositioned (turned) once worn.

Dans la forme de réalisation, des barrettes 61 obturent partiellement la fenêtre 5 et servent de moyens de contrôle de l'ouverture de la fenêtre 5. Ces barrettes 61 définissent le bord d'échappement final 5B de la fenêtre (ou 5A pour l'autre sens de rotation), zone particulièrement soumise à l'abrasion due aux grenailles.In the embodiment, bars 61 partially close the window 5 and serve as means of controlling the opening of the window 5. These bars 61 define the final exhaust edge 5B of the window (or 5A for the other direction of rotation), an area particularly subject to abrasion due to shot.

Lorsque les butées d'arrêt 11 sont positionnables en plusieurs endroits différents (par exemple dans les gorges 8,9), il est possible de contrôler la longueur LF de la fenêtre 5, c'est-à-dire de pouvoir contrôler la largeur du jet de grenaillage.When the stops 11 can be positioned in several different places (for example example in the grooves 8, 9), it is possible to control the length LF of the window 5, that is to say to be able to control the width of the shot blasting.

Le distributeur 2 présente une série de bras 20 agencés au voisinage de la face intérieure constituée par les barrettes 6 de la pièce de contrôle 1. Les barrettes 6 ont une longueur L supérieure à la largeur Y des ouvertures 21 du distributeur 2, ces ouvertures 21 étant définies entre les bras 20.The distributor 2 has a series of arms 20 arranged in the vicinity of the face interior formed by the bars 6 of the control piece 1. The bars 6 have a length L greater than the width Y of the openings 21 of the distributor 2, these openings 21 being defined between the arms 20.

Les bras 20 du distributeur sont constitués de blochets réalisés en un matériau présentant une résistance à l'abrasion au moins sensiblement égale à celle des barrettes 6 de protection de la pièce de contrôle 1.The arms 20 of the dispenser consist of blocks made of a material having an abrasion resistance at least substantially equal to that of bars 6 for protecting the control piece 1.

Dans la forme de réalisation, le distributeur 2 comporte un plateau 22, une couronne 23, une série de blochets 20 destinés à être placés entre le plateau 22 et la couronne 23, et une série de boulons 24, moyens pour solidariser la couronne 23 au plateau 22 et pour solidariser les blochets 20 à la couronne 23 et au plateau 22. Les blochets de section transversale polygonale présente un passage ou trou axial 25 destiné à recevoir la tige d'un boulon 24 utilisé pour solidariser la couronne au plateau.In the embodiment, the distributor 2 comprises a plate 22, a crown 23, a series of blocks 20 intended to be placed between the plate 22 and the crown 23, and a series of bolts 24, means for securing the crown 23 to the plate 22 and to secure the blocks 20 to the crown 23 and to the plate 22. The blocks polygonal cross section has an axial passage or hole 25 intended for receive the stem of a bolt 24 used to secure the crown to the plate.

La solidarisation du plateau et de la couronne peut ainsi être réalisée par des vis et entretoises extérieures au blochet, du côté opposé à la face active. Dans ce cas de montage, un seul sens de rotation est autorisé, celui qui empêche les entretoises de s'user. The connection of the plate and the crown can thus be achieved by screws and spacers outside the block, on the side opposite the active face. In this case of mounting, only one direction of rotation is allowed, that which prevents the spacers from wear.

Le plateau 22 et la couronne 23 présentent des creux 22A,23A pour recevoir l'extrémité des blochets.
Les blochets ont par exemple une section polygonale (en particulier rectangulaire) avec une épaisseur ou hauteur de 5 à 30mm et une largeur supérieure de 5 à 25mm, la longueur étant fonction de l'écartement entre le plateau et la couronne. Ces dimensions dépendent de la grandeur des distributeurs, elles sont donc données à titre indicatif.The plate 22 and the crown 23 have recesses 22A, 23A for receiving the end of the blocks.
The blocks have for example a polygonal section (in particular rectangular) with a thickness or height of 5 to 30mm and a greater width of 5 to 25mm, the length being a function of the spacing between the plate and the crown. These dimensions depend on the size of the distributors, they are therefore given as an indication.

Une autre disposition du distributeur relevant de la même invention, à savoir rendre les pièces d'usure amovibles et remplaçables, est de « coiffer » les bras du distributeur d'une jaquette par exemple en forme de L ou de U fabriquée en matériaux à haute résistance à l'usure tels que des carbures de tungstène, des nitrures, des céramiques, etc. (voir figure 6)Another provision of the distributor under the same invention, namely making the removable and replaceable wearing parts, is to "style" the arms of the distributor of a jacket for example in the form of L or U made in materials with high wear resistance such as tungsten carbides, nitrides, ceramics, etc. (see figure 6)

Les blochets, ou bras dans le cas de distributeur monobloc coulé par exemple, sont constitués de ou comprennent deux pièces, à savoir le blochet central (ou le bras) 20A et la jaquette de protection 20B. Le fond du U de la jaquette est placé du côté intérieur de sorte que la rotation du distributeur centrifuge et maintient la jaquette en place. Une telle disposition est montrée à la figure 6, coupe V-V d'un distributeur équipée de jaquette en alliage à haute résistance à l'usure. La figure 6 montre un blochet 20A (ou un bras 20A) de distributeur entouré d'une jaquette offrant deux faces d'usure 20Bis.The blocks, or arms in the case of a cast monobloc distributor for example, are consist of or include two parts, namely the central block (or arm) 20A and the protective jacket 20B. The bottom of the U of the dust jacket is placed on the side interior so that the centrifugal distributor rotates and keeps the jacket in square. Such an arrangement is shown in FIG. 6, section V-V of a dispenser fitted with a high wear resistance alloy jacket. Figure 6 shows a distributor block 20A (or arm 20A) surrounded by a jacket offering two 20Bis wear faces.

Dans un sens de rotation, c'est une face active 20Bis qui s'use, tandis que dans le sens de rotation opposé, l'autre face active 20Bis s'use. Il est clair, comme c'est le cas du blochet décrit ci-avant, qu'il suffit de retourner la jaquette pour présenter une nouvelle face active 20Bis non usée. Le fond du U étant bien entendu toujours placé du côté petit diamètre. In one direction of rotation, an active face 20Bis wears out, while in the opposite direction of rotation, the other active face 20Bis wears out. It is clear, as is the case of the blochet described above, it suffices to turn the jacket over to present a new unused 20Bis active face. The bottom of the U being of course always placed on the small diameter side.

Lors de l'utilisation du système d'alimentation décrit ci-avant pour alimenter une turbine de grenaillage du type centrifuge, on a remarqué que les barrettes 6 étaient soumises à un effort les poussant vers la ou les butées adjacentes du bord d'échappement 5B de la fenêtre 5, bord qui est soumis à la plus forte usure. Ce léger mouvement assure également que les barrettes 6 sont bien en contact les unes avec les autres au moins au voisinage du bord d'échappement 5B. Dans l'autre sens de rotation, c'est le bord 5A de la fenêtre qui est concerné.When using the power system described above to power a blasting turbine of the centrifugal type, it was noted that the bars 6 were subjected to a force pushing them towards the adjacent abutment (s) on the edge exhaust 5B from window 5, edge which is subject to the greatest wear. This light movement also ensures that the bars 6 are in good contact with each other others at least in the vicinity of the exhaust edge 5B. In the other direction of rotation, it is the edge 5A of the window which is concerned.

Lorsque les barrettes 6 et les blochets 20 ou les jaquettes ont une forme symétrique, il est possible une fois qu'une face d'une barrette ou d'un blochet ou d'une jaquette est usée de retourner la barrette ou le blochet ou la jaquette pour utiliser la face non usée.When the bars 6 and the blocks 20 or the jackets have a symmetrical shape, it is possible once a face of a bar or a block or a jacket is worn to turn the bar or block or dust jacket over to use the unused side.

Il est clair que la forme de réalisation décrite ci-avant n'est donnée ici qu'à titre d'exemple. Ainsi pour des distributeurs de petite dimension, on utilisera avantageusement une pièce mono bloc réalisée en un matériau résistant à l'abrasion (par exemple carbure de tungstène). Bien qu'avantageusement, les barrettes et les blochets aient une forme polygonale simple (pour avoir un faible coût de fabrication), il est possible d'utiliser des sections transversales plus complexes que carrées ou rectangulaire comme des sections trapézoïdales par exemple.It is clear that the embodiment described above is given here only as a example. So for small distributors, we will use advantageously a single block part made of an abrasion resistant material (for example tungsten carbide). Although advantageously, the bars and the blocks have a simple polygonal shape (to have a low manufacturing cost), it is possible to use more complex cross sections than square or rectangular like trapezoidal sections for example.

Le dispositif d'alimentation représenté aux figures est associé à une turbine de grenaillage pour réaliser un grenaillage une ou de plusieurs pièces par exemple dans une chambre de grenaillage. Cette turbine peut alors être utilisée dans un procédé de grenaillage, dans lequel lors du remplacement d'une ou de palettes usées de la turbine, on contrôle et on remplace la face de barrettes usées par une face de barrettes non usées ou par une face non usée des barrettes et/ou la face usée d'un blochet par une face non usée d'un blochet et/ou la face usée d'une jaquette par une face non usée d'une jaquette.The supply device shown in the figures is associated with a turbine shot blasting to make a shot blasting one or more pieces for example in a blasting chamber. This turbine can then be used in a process of shot blasting, in which when replacing one or more worn pallets of the turbine, check and replace the face of worn bars with a face of bars not worn or by an unused side of the bars and / or the worn side of a block by an unused side of a block and / or the worn side of a dust jacket by an unused side a dust jacket.

Claims (23)

Elément (1,2) d'un dispositif d'alimentation en grenaille pour une turbine de grenaillage centrifuge, caractérisé en ce que l'élément (1,2) comprend au moins un support (1A, 22,23) avantageusement en acier traité et une ou des pièces d'usure (6,20,20bis) amovibles et remplaçables, reliées ou attachées audit support (1A,22,23).Element (1,2) of a shot feed device for a centrifugal shot blasting turbine, characterized in that the element (1,2) comprises at least one support (1A, 22,23) advantageously made of treated steel and one or more wear parts (6,20,20bis) removable and replaceable, connected or attached to said support (1A, 22,23). Elément suivant la revendication 1, ledit élément étant un distributeur (2) pour alimentation en grenaille pour une turbine de grenaillage centrifuge, ledit distributeur (2) comprenant un support (22,23) pour des bras (20) ou un support avec des bras, dans lequel la ou les pièces d'usure sont des bras (20) montés sur le support de manière amovible et remplaçable ou des jaquettes (20bis) montées de manière amovible et remplaçable sur des bras (20).Element according to claim 1, said element being a distributor (2) for shot supply for a centrifugal shot blasting turbine, said distributor (2) comprising a support (22,23) for arms (20) or a support with arms, in which the wear part or parts are arms (20) mounted on the support removable and replaceable or jackets (20bis) mounted so removable and replaceable on arms (20). Elément suivant la revendication 1, ledit élément étant une pièce de contrôle (1) pour l'alimentation en grenaille pour une turbine de grenaillage centrifuge, ladite pièce de contrôle (1) comprenant au moins un support (1A) pour une ou plusieurs barrettes (6) amovibles et remplaçables.Element according to claim 1, said element being a control piece (1) for supplying shot for a centrifugal shot blasting turbine, said shot control piece (1) comprising at least one support (1A) for one or more removable and replaceable bars (6). Pièce de contrôle suivant la revendication 3, ladite pièce de contrôle (1) présentant une lumière d'échappement (5) servant à l'alimentation en grenaille de la turbine et une surface intérieure s'étendant entre un bord de début d'échappement (5A) et un bord de fin d'échappement (5B), dans laquelle une série de barrettes axiales (6) disposées les unes à côté des autres forment une protection d'au moins une partie de la surface intérieure adjacente à la lumière d'échappement (5).Control piece according to claim 3, said control piece (1) having an exhaust port (5) for supplying the turbine with pellets and an inner surface extending between an exhaust start edge (5A) and a exhaust end edge (5B), in which a series of axial bars (6) arranged next to each other form a protection of at least part of the inner surface adjacent to the exhaust port (5). Pièce de contrôle suivant la revendication 4 destinée à coopérer avec un distributeur rotatif présentant une série de passages radiaux, lesdits passages présentant une largeur axiale (Y), caractérisée en ce que des barrettes axiales (6) disposées les unes à côté des autres forment une protection d'une partie de la face intérieure sur une largeur (L) au moins égale à la largeur axiale (Y) des passages radiaux du distributeur.Control piece according to claim 4 intended to cooperate with a rotary distributor having a series of radial passages, said passages having an axial width (Y), characterized in that axial bars (6) arranged one next to the other form a protection of part of the inner face over a width (L) at least equal to the axial width (Y) of the radial passages of the distributor. Pièce de contrôle suivant l'une quelconque des revendications 3 à 5, caractérisée en ce qu'elle est munie d'une série de barrettes axiales (6) placées les unes à côté des autres et formant une protection de la surface intérieure entre le bord de fin d'échappement (5B) et le bord de début d'échappement (5A) ou une zone adjacente à ce bord.Control piece according to any one of Claims 3 to 5, characterized in that it is provided with a series of axial bars (6) placed one next to the other and forming a protection of the interior surface between the edge exhaust end (5B) and the exhaust start edge (5A) or an area adjacent to that edge. Pièce de contrôle suivant l'une quelconque des revendications 3 à 6, caractérisée en ce que le support (1A,1B) présente au moins une gorge (8,9) destinée à recevoir une extrémité (6A,6B) des barrettes (6), de préférence deux gorges (8,9) agencées l'une par rapport à l'autre de manière à ce qu'une première gorge (8) soit adaptée pour recevoir une première extrémité (6A) des barrettes (6), tandis que l'autre gorge (9) est adaptée pour recevoir l'autre extrémité (6B) des barrettes (6).Control piece according to any one of claims 3 to 6, characterized in that the support (1A, 1B) has at least one groove (8,9) intended to receive one end (6A, 6B) of the bars (6) , preferably two grooves (8,9) arranged relative to each other so that a first groove (8) is adapted to receive a first end (6A) of the bars (6), while the other groove (9) is adapted to receive the other end (6B) of the bars (6). Pièce de contrôle suivant l'une quelconque des revendications 3 à 7, caractérisée en ce que le support comporte deux parties (1A,1B) aptes à être écartées l'une de l'autre pour le placement de barrettes (6), et au moins un moyen de solidarisation (7) des parties dans une position rapprochée l'une de l'autre.Control piece according to any one of claims 3 to 7, characterized in that the support comprises two parts (1A, 1B) capable of being separated from one another for the placement of bars (6), and at less a means of securing (7) the parts in a position close to each other. Pièce de contrôle suivant l'une quelconque des revendications 3 à 8, caractérisée en ce que les barrettes (6) ont une section transversale polygonale, avantageusement sensiblement carrée ou sensiblement rectangulaire, voire trapézoïdale, de hauteur comprise entre 2 et 15mm et de largeur comprise entre 2 et 20 mm.Control piece according to any one of claims 3 to 8, characterized in that the bars (6) have a polygonal cross section, advantageously substantially square or substantially rectangular, even trapezoidal, of height between 2 and 15mm and of width included between 2 and 20 mm. Pièce de contrôle suivant l'une quelconque des revendications 3 à 9, caractérisée en ce que les barrettes (6) sont réalisées en matériau à haute dureté, avantageusement en alliages à très haute dureté, en particulier en carbure de tungstène, en céramique ou en nitrure.Control piece according to any one of Claims 3 to 9, characterized in that the bars (6) are made of high hardness material, advantageously of very high hardness alloys, in particular tungsten carbide, ceramic or nitride. Pièce de contrôle suivant l'une quelconque des revendications 3 à 10, caractérisée en ce qu'une ou plusieurs barrettes (61) obturent partiellement la fenêtre (5) et servent de moyens de contrôle de l'ouverture (LF) de la fenêtre (5).Control piece according to any one of Claims 3 to 10, characterized in that one or more bars (61) partially close the window (5) and serve as means for controlling the opening (LF) of the window ( 5). Distributeur suivant la revendication 2, caractérisé en ce que les bras du distributeur sont constitués de blochets (20) réalisés en un matériau présentant une résistance à l'abrasion.Dispenser according to claim 2, characterized in that the arms of the dispenser consist of blocks (20) made of a material having abrasion resistance. Distributeur suivant la revendication 2 ou 12, caractérisé en ce que le distributeur comporte un plateau (22), une couronne (23), une série de blochets (20) destinés à être placés entre le plateau (22) et la couronne (23), et une série de moyens (24) pour solidariser la couronne au plateau et pour solidariser les blochets (20) à la couronne (23) et/ou au plateau (22).Distributor according to claim 2 or 12, characterized in that the distributor comprises a plate (22), a crown (23), a series of blocks (20) intended to be placed between the plate (22) and the crown (23) , and a series of means (24) for securing the crown to the plate and for securing the blocks (20) to the crown (23) and / or to the plate (22). Distributeur suivant la revendication 12 ou 13, caractérisé en ce que les blochets (20) présente un passage ou trou axial (25) destiné à recevoir une tige (24) ou un élément utilisé pour solidariser la couronne (23) au plateau (22).Distributor according to claim 12 or 13, characterized in that the blocks (20) have an axial passage or hole (25) intended to receive a rod (24) or an element used to secure the crown (23) to the plate (22) . Distributeur suivant l'une des revendications 12 à 14, caractérisé en ce que le plateau (22) et/ou la couronne (23) présentent des creux (22A,23A) pour recevoir l'extrémité des blochets (20).Distributor according to one of claims 12 to 14, characterized in that the plate (22) and / or the crown (23) have recesses (22A, 23A) for receiving the end of the blocks (20). Distributeur suivant l'une des revendications 12 à 15, caractérisé en ce que les bras ou les blochets (20A) sont recouverts d'une jaquette amovible (20B), avantageusement en U et réalisé en matériau à haute dureté résistant à l'usure. Dispenser according to one of claims 12 to 15, characterized in that the arms or the blocks (20A) are covered with a removable jacket (20B), advantageously in U and made of high hardness material resistant to wear. Système d'admission de grenailles pour une turbine de grenaillage centrifuge, ledit système comportant au moins un élément suivant l'une quelconque des revendications 1 à 16, avantageusement au moins une pièce de contrôle suivant l'une quelconque des revendications 3 à 11.Shot blasting system for a centrifugal shot blasting turbine, said system comprising at least one element according to any one of Claims 1 to 16, advantageously at least one control piece according to one any of claims 3 to 11. Système suivant la revendication 17, caractérisé en ce qu'il comporte au moins une pièce de contrôle (1) suivant l'une des revendications 3 à 11 et un distributeur (2) destiné à être monté rotatif par rapport à la pièce de contrôle (1), ledit distributeur (2) étant un distributeur suivant l'une des revendications 2 et 12 à 16.System according to Claim 17, characterized in that it comprises at least one control piece (1) according to one of Claims 3 to 11 and a distributor (2) intended to be rotatably mounted relative to the control piece ( 1), said distributor (2) being a distributor according to one of claims 2 and 12 to 16. Système suivant la revendication 16 ou 17, caractérisé en ce que les bras du distributeur sont constitués de blochets (20) réalisés en un matériau présentant une résistance à l'abrasion au moins sensiblement égale à celle des barrettes de protection (6) de la pièce de contrôle (1).System according to claim 16 or 17, characterized in that the arms of the dispenser consist of blocks (20) made of a material having an abrasion resistance at least substantially equal to that of the protective bars (6) of the workpiece control (1). Système suivant l'une des revendications 16 à 19, caractérisé en ce que les bras ou les blochets sont recouverts d'une jaquette amovible (20B), avantageusement en U et réalisé en matériau à haute dureté résistant à l'usure.System according to one of claims 16 to 19, characterized in that the arms or blocks are covered with a removable jacket (20B), advantageously in U and made of high hardness material resistant to wear. Turbine de grenaillage centrifuge comportant un système suivant l'une des revendications 16 à 20 .Centrifugal blasting turbine comprising a system according to one of the claims 16 to 20. Procédé de grenaillage dans lequel on utilise une turbine suivant la revendication précédente.Shot blasting method using a turbine according to claim previous. Procédé de grenaillage suivant la revendication précédente, caractérisé en ce que lors du remplacement d'une ou de palettes usées de la turbine, on contrôle et on remplace la face de barrettes usées par une face de barrettes non usées ou par une face non usée des barrettes et/ou la face usée d'un blochet par une face non usée d'un blochet et/ou la face usée d'une jaquette par une face non usée d'une jaquette.Shot peening method according to the preceding claim, characterized in that when one or more worn blades of the turbine is replaced, the face of worn bars is checked and replaced by a face of unused bars or by an unused side of the bars and / or the worn side of a blanket by an unused side of a blanket and / or the worn side of a dust jacket by an unused side of a dust jacket.
EP03447269A 2002-11-04 2003-10-30 Control piece and distributor for abrasive material feeding into a machine with a throwing wheel and its use Expired - Lifetime EP1419854B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2002/0628A BE1015168A3 (en) 2002-11-04 2002-11-04 Control room and distributor for turbine power centrifugal blasting and use.
BE200200628 2002-11-04

Publications (2)

Publication Number Publication Date
EP1419854A1 true EP1419854A1 (en) 2004-05-19
EP1419854B1 EP1419854B1 (en) 2006-11-22

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EP03447269A Expired - Lifetime EP1419854B1 (en) 2002-11-04 2003-10-30 Control piece and distributor for abrasive material feeding into a machine with a throwing wheel and its use

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EP (1) EP1419854B1 (en)
AT (1) ATE345901T1 (en)
BE (1) BE1015168A3 (en)
DE (1) DE60309813T2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005049276A1 (en) * 2003-11-17 2005-06-02 Wheelabrator Group, Inc. Control cage for abrasive blast wheel
EP2826593A1 (en) * 2013-07-19 2015-01-21 Prefer - Equipamentos Para Decapagem LDA. Shot blasting turbine and components

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285938A (en) * 1994-01-28 1995-08-02 Anthony Patrick Philippson Throwing wheel for an abrasion machine having separable core to enable reversible mounting in the machine so that both blade faces can be used

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285938A (en) * 1994-01-28 1995-08-02 Anthony Patrick Philippson Throwing wheel for an abrasion machine having separable core to enable reversible mounting in the machine so that both blade faces can be used

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005049276A1 (en) * 2003-11-17 2005-06-02 Wheelabrator Group, Inc. Control cage for abrasive blast wheel
US6949014B2 (en) 2003-11-17 2005-09-27 Wheelabrator Group, Inc. Control cage for abrasive blast wheel
EP2826593A1 (en) * 2013-07-19 2015-01-21 Prefer - Equipamentos Para Decapagem LDA. Shot blasting turbine and components
EP2829360A1 (en) * 2013-07-19 2015-01-28 Prefer - Equipamentos Para Decapagem, Lda. Control cage for a shot blasting turbine and components
EP2829361A1 (en) * 2013-07-19 2015-01-28 Prefer - Equipamentos Para Decapagem, Lda. Impeller for a shot blasting turbine and components

Also Published As

Publication number Publication date
DE60309813D1 (en) 2007-01-04
ATE345901T1 (en) 2006-12-15
DE60309813T2 (en) 2007-08-02
BE1015168A3 (en) 2004-10-05
EP1419854B1 (en) 2006-11-22

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