EP1419854B1 - Kontrollstück und Verteiler zur Materialzuführung zur Sandstrahlanlage mit Schleuderrad und dessen Anwendung - Google Patents

Kontrollstück und Verteiler zur Materialzuführung zur Sandstrahlanlage mit Schleuderrad und dessen Anwendung Download PDF

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Publication number
EP1419854B1
EP1419854B1 EP03447269A EP03447269A EP1419854B1 EP 1419854 B1 EP1419854 B1 EP 1419854B1 EP 03447269 A EP03447269 A EP 03447269A EP 03447269 A EP03447269 A EP 03447269A EP 1419854 B1 EP1419854 B1 EP 1419854B1
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EP
European Patent Office
Prior art keywords
distributor
turbine
control piece
bars
designed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03447269A
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English (en)
French (fr)
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EP1419854A1 (de
Inventor
Léon Rutten
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RUTTEN SA
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RUTTEN SA
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Publication date
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Publication of EP1419854A1 publication Critical patent/EP1419854A1/de
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Publication of EP1419854B1 publication Critical patent/EP1419854B1/de
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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 subject of the present invention is a control part of a feeding device as described in the preamble of claim 1, as well as a dispenser of a feed device as described in the preamble of claim 10.
  • Such elements are known from GB-A-2285938.
  • Centrifugal shot blasting turbines comprise pallets mounted on between rotating and integral plates, and are associated in a known manner with a fixed control part, and with a rotary or impeller dispenser.
  • the distributor or impeller
  • the control room surrounds this dispenser. It is fixed in space but adjustable angularly to fix the direction of the shot jet. It is well known that the parts in contact with the shot are subjected to significant abrasion.
  • the strips or wear parts will advantageously be conveniently positioned in the control parts and / or in the distributors to ensure good wear resistance of the support during their use.
  • Removable and replaceable strips or wear parts are advantageously made of alloys with very high hardness, and can be advantageously replaced or repositioned (for example after a turnaround) to produce control rooms and / or refurbished or recycled distributors.
  • the supports of these control parts and / or distributors would thus be intact or almost intact, and the bars or wear parts actually subject to wear would be replaced or repositioned.
  • This way of constructing the control and dispensing parts thus makes it possible to considerably increase their life, while offering a quick, profitable and economical solution to ensure a good resistance to wear in one or more areas subjected to wear.
  • the control piece ( Figure 1) comprises a body (support) defining a central chamber for receiving a rotary distributor, said chamber having a substantially cylindrical inner face.
  • the body has a window controlling the passage of shot (FIGS. 2 and 3) from the central chamber or the rotary distributor 2 towards the radial turbine, said window having an edge of the start of the escape of the shot in the turbine and an end edge exhaust of 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 strips made of a material having an abrasion resistance greater than that of the material used for the body, said strips forming at least partial protection of the distribution end-of-exhaust edge and / or a portion of the substantially cylindrical inner face adjacent to the end-of-exhaust edge. Said strips thus advantageously form an at least partial protection of the cylindrical inner surface of the control room, in particular from the distribution exhaust to the end-of-exhaust edge.
  • control piece is provided with a series of axial strips arranged next to each other, said strips forming a protection of the end of the exhaust distribution edge and at least a portion of the inner face substantially cylindrical adjacent to the end edge of the exhaust.
  • the control piece advantageously cooperates with a rotary distributor 2 having a series of radial passages, said passages having a width axial.
  • Axially arranged strips next to one another advantageously form a polygonal surface portion close to a cylindrical surface or circle and advantageously provide protection for the part of the inner face, over a width at least equal to the axial width of the passages. Radials of the dispenser 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 end edge of the exhaust and the beginning edge of exhaust or an area adjacent to that edge.
  • the body has at least one recess in which are placed the bars.
  • the body has at least one groove for receiving one end of the webs, preferably two grooves arranged relative to each other so that a first groove is adapted to receive a first end of the webs , while the other groove is adapted to receive the other end of the bars.
  • the body has two parts that can be separated from one another for the placement of bars, and at least one means for securing the parts in a position close to one another. 'other.
  • the strips advantageously have a polygonal cross section, advantageously substantially square or substantially rectangular or trapezoidal, height between 2 and 15mm and width between 2 and 20 mm.
  • a section of cylindrical bar could also be suitable but this one is a lot less efficient than a square, rectangular or trapezoidal section.
  • the surface created by the bars must approach as advantageously as possible of a portion of a cylindrical surface.
  • the bars are preferably made of tungsten carbide or other ultra-hard alloys offering exceptional wear resistance (nitride, ceramic, etc.).
  • one or more bars partially block the window and serve as means for controlling the opening of the window.
  • the invention also relates to a grit intake system for a centrifugal blast-cleaning turbine, said system comprising at least one control part according to the invention and, advantageously, a distributor intended to be rotatably mounted with respect to the centrifuge part. control, said distributor having a series of arms arranged in the vicinity of the inner face of the control room.
  • the arms of the dispenser consist of blokets made of a material having an abrasion resistance at least substantially equal to that of the protective bars of the control room.
  • the dispenser comprises a plate, a crown, a series of blokets intended to be placed between the plate and the crown, and a series of means for securing the crown to the plate and for securing the blocks to the crown and / or the plateau.
  • the blokets have a passage or axial hole for receiving a rod or an element used to secure the crown to the plate.
  • the plate and / or the crown have recesses for receiving the end of the blocks.
  • the invention also relates to a centrifugal blast cleaning turbine comprising a system according to the invention, and a shot blasting process in which a turbine according to the invention is used.
  • the supply system represented in FIG. 1 comprises a control part 1 and a distributor 2, the latter being mobile with respect to the control part 1.
  • the distributor 2 is for example mounted on the shaft of a driving motor. in rotation the centrifugal blast-cleaning turbine (not shown).
  • a feed chute 3 conducts the shot in the center of the distributor 2.
  • the shot is centrifuged by the arms 20 of the distributor and ejected by the light 5 of the control room 1.
  • the shot coming out of the light 5 is then picked up by the turbine which thus achieves its acceleration until the ejection of the turbine, the outer diameter thereof.
  • the control part 1 comprises a body 1A defining a central chamber 4 intended to receive a rotary distributor 2, said chamber 4 having a substantially cylindrical inner surface 4A.
  • This body 1A has a window 5 controlling the passage of shot from the central chamber 4 or the rotary distributor 2 to the radial or centrifugal turbine.
  • the window 5 has an exhaust start edge 5A of the shot in the turbine and an end edge of the exhaust 5B of shot in the turbine.
  • control part 1 is provided with at least one series of strips 6 made of a material having an abrasion resistance greater than that of the material used for the body 1A, said strips forming a protection end of the exhaust end 5B supply and / or a portion of the substantially cylindrical inner face adjacent to the end edge of exhaust 5B.
  • 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 the centrifugal turbine) placed next to each other and forming a protection of the inner surface between the end edge exhaust 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 secured to one another by means of bolts 7 or other mechanical systems.
  • Each piece 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 spaced apart from each other for the placement of bars 6.
  • the grooves 8,9 are provided with stoppers 11 to ensure that bars are not located in at least a portion of the window 5.
  • the bars 6 have a polygonal cross-section, advantageously substantially square or substantially rectangular or trapezoidal, with a height H of between 2 and 15 mm (for example 3.5, 7, 8, 10 mm) and with a width LL of between 2 and 20 mm. (eg 3,4,5,6,8,10,12,15 mm).
  • the polygonal shape of the bars 6, as well as its dimensions, are chosen to obtain a substantially cylindrical surface or corresponding to a portion of a substantially cylindrical surface. These dimensions are given as an indication and depend on the size of the control room.
  • the bars 6 are advantageously made of material or alloy with high hardness, in particular tungsten carbide or other anti-wear material (nitride, ceramic, ). It would also have been possible to use bars of hardness similar to that of the body, these strips being then replaced or repositioned (turned) once worn.
  • bars 61 partially block the window 5 and serve as means for 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), area particularly subject to abrasion due to shot.
  • the stops 11 are positionable in several different places (for 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 blast.
  • the distributor 2 has a series of branches 20 branches in the vicinity of the inner face constituted by the bars 6 of the control room 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 shafts made of a material having an abrasion resistance at least substantially equal to that of the bars 6 for protecting the control part 1.
  • the distributor 2 comprises a plate 22, a ring 23, a series of blokets 20 intended to be placed between the plate 22 and the ring gear 23, and a series of bolts 24, means for securing the ring gear 23 to plate 22 and to secure the blocks 20 to the ring 23 and the plate 22.
  • the polygonal cross-section of the rattles has an axial passage or hole 25 for receiving the rod of a bolt 24 used to secure the ring to the plate.
  • the securing of the plate and the ring can thus be achieved by screws and spacers outside the blochet, on the opposite side to the active face. In this case of assembly, only one direction of rotation is allowed, the one which prevents the spacers to wear out.
  • the plate 22 and the ring 23 have recesses 22A, 23A for receiving the end of the blocks.
  • Blocks have for example a polygonal section (in particular rectangular) with a thickness or height of 5 to 30mm and a width greater than 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, so they are given as an indication.
  • Another provision of the dispenser of the same invention namely to make the wear parts removable and replaceable, is to "cap" the arms of the distributor of a jacket for example L-shaped or U made of high-grade materials. wear resistance such as tungsten carbides, nitrides, ceramics, etc. (see Figure 6)
  • Blocks, or arms in the case of cast monobloc dispenser for example consist of or comprise two parts, namely the central beam (or the arm) 20A and the protective jacket 20B.
  • the bottom of the U of the jacket is placed on the inner side so that the rotation of the centrifugal distributor and keeps the jacket in place.
  • FIG. 6 shows a distributor 20A (or a distributor arm 20A) surrounded by a jacket having two wear faces 20Bis.
  • the feed device shown in the figures is associated with a shot blast turbine for blasting one or more parts for example in a shot blast chamber.
  • This turbine can then be used in a shot blasting process, in which when replacing one or worn vanes of the turbine, the face of worn strips is checked and replaced by a face of non-worn bars or a non-worn face. worn bars and / or the worn face of a rattle by an unused face of a rattle and / or the worn side of a jacket by an unused face of a jacket.

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

Claims (22)

  1. Steuerstück (1) einer Vorrichtung (1+2) zur Strahlmittelversorgung für eine Zentrifugalstrahlturbine, wobei diese Versorgungsvorrichtung einen Verteiler (2) und das Steuerstück (1) umfasst, das diesen Verteiler (2) umgibt, wobei das Steuerstück (1) eine Austrittsöffnung (5), die zur Strahlmittelversorgung der Turbine dient, und eine Innenfläche aufweist, die sich zwischen einem Rand (5A) des Anfangs des Strahlmittelaustritts aus der Versorgungsvorrichtung zur Turbine und einem Rand (5B) des Endes des Strahlmittelaustritts zur Turbine erstreckt, wobei der Verteiler dafür (2) ausgelegt ist, in der Mitte der Turbine befestigt zu werden, die zwischen Platten montierte Schaufeln umfasst, und dafür ausgelegt ist, sich mit der Turbine zu drehen, wobei das Steuerstück (1) einen Halter (1A, 1B) vorteilhafterweise aus behandeltem Stahl und Verschleißteile umfasst, dadurch gekennzeichnet, dass eine Reihe von nebeneinander angeordneten axialen Stäben (6) einen Schutz mindestens eines an die Austrittsöffnung (5) des Steuerstücks angrenzenden Teils der Innenfläche bildet, wobei diese Stäbe (6) lösbar und austauschbar auf mindestens einem Halter des Steuerstücks montiert sind.
  2. Steuerstück nach Anspruch 1, wobei dieses Steuerstück (1) eine Austrittsöffnung (5), die zur Versorgung der Turbine mit Strahlmittel dient, und eine Innenfläche aufweist, die sich zwischen einem Austrittsanfangsrand (5A) und einem Austrittsenderand (5B) erstreckt, bei dem eine Reihe von nebeneinander angeordneten axialen Stäben (6) einen Schutz mindestens eines an die Austrittsöffnung (5) angrenzenden Teils der Innenfläche bildet.
  3. Steuerstück nach Anspruch 2, das dazu bestimmt ist, mit einem rotierenden Verteiler zusammenzuwirken, der eine Reihe von radialen Durchgängen aufweist, wobei diese Durchgänge eine axiale Breite (Y) aufweisen, dadurch gekennzeichnet, dass die nebeneinander angeordneten axialen Stäbe (6) einen Schutz eines Teils der Innenfläche auf Breite (L) bilden, die mindestens gleich der axialen Breite (Y) der radialen Durchgänge des Verteilers ist.
  4. Steuerstück nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass es mit einer Reihe von axialen Stäben (6) versehen ist, die nebeneinander angeordnet sind und einen Schutz der Innenfläche zwischen dem Austrittsenderand (5B) und dem Austrittsanfangsrand (5A) oder einer an diesen Rand angrenzenden Zone bilden.
  5. Steuerstück nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Halter (1A, 1 B) mindestens eine Nut (8, 9) aufweist, die dazu bestimmt ist, ein Ende (6A, 6B) der Stäbe (6) aufzunehmen, vorzugsweise zwei Nuten (8, 9), die zueinander so angeordnet sind, dass eine erste Nut (8) dafür ausgelegt ist, ein erstes Ende (6A) der Stäbe (6) aufzunehmen, während die andere Nut (9) dafür ausgelegt ist, das andere Ende (68) der Stäbe (6) aufzunehmen.
  6. Steuerstück nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Halter zwei Teile (1A, 1B), die geeignet sind, für das Einsetzen der Stäbe (6) voneinander entfernt zu werden, und mindestens ein Mittel (7) zur festen Verbindung der Teile in einer einander angenäherten Stellung umfasst.
  7. Steuerstück nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Stäbe (6) einen polygonalen, vorteilhafterweise im Wesentlichen quadratischen oder im wesentlichen rechteckigen oder auch trapezförmigen Querschnitt mit einer Höhe zwischen 2 und 15 mm und einer Breite zwischen 2 und 20 mm aufweisen.
  8. Steuerstück nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Stäbe (6) aus einem Werkstoff hoher Härte, vorteilhafterweise aus Legierungen sehr hoher Härte, insbesondere aus Wolframcarbid, aus Keramik oder aus Nitrid, hergestellt sind.
  9. Steuerstück nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass ein oder mehrere Stäbe (61) das Fenster (5) teilweise verschließen und als Mittel zur Steuerung der Öffnung (LF) des Fensters (5) dienen.
  10. Verteiler (2) einer Vorrichtung (1+2) zur Strahlmittelversorgung für eine Zentrifugalstrahlturbine, wobei diese Versorgungsvorrichtung den Verteiler (2) und ein Steuerstück (1) umfasst, das diesen Verteiler (2) umgibt, wobei das Steuerstück (1) eine Austrittsöffnung (5), die zur Strahlmittelversorgung der Turbine dient, und eine Innenfläche aufweist, die sich zwischen einem Rand (5A) des Anfangs des Strahlmittelaustritts aus der Versorgungsvorrichtung zur Turbine und einem Rand (5B) des Endes des Strahlmittelaustritts zur Turbine erstreckt, wobei der Verteiler dafür (2) ausgelegt ist, in der Mitte der Turbine befestigt zu werden, die zwischen Platten montierte Schaufeln umfasst, und dafür ausgelegt ist, sich mit der Turbine zu drehen, wobei der Verteiler (2) einen Halter (22, 23) vorteilhafterweise aus behandeltem Stahl und Verschleißteile umfasst, dadurch gekennzeichnet, dass der Verteiler (2) einen Halter (22, 23) für Arme aufweist, bei dem die Verschleißteile auf dem Halter lösbar und austauschbar montierte Arme sind.
  11. Verteiler nach Anspruch 10, dadurch gekennzeichnet, dass die Arme des Verteilers aus Stegen (20) bestehen, die aus einem eine Abriebfestigkeit aufweisenden Werkstoff hergestellt sind.
  12. Verteiler nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass der Verteiler eine Platte (22), einen Kranz (23), eine Reihe von Stegen (20), die dazu bestimmt sind, zwischen der Platte (22) und dem Kranz (23) angeordnet zu werden, und eine Reihe von Mitteln (24) zur festen Verbindung des Kranzes mit der Platte und zur festen Verbindung der Stege (20) mit dem Kranz (23) und/oder mit der Platte (22) umfasst.
  13. Verteiler nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Stege (20) einen axialen Durchgang bzw. ein axiales Loch (25) aufweisen, der bzw. das dazu bestimmt ist, eine Stange (24) oder ein Element aufzunehmen, das dazu verwendet wird, um den Kranz (23) mit der Platte (22) fest zu verbinden.
  14. Verteiler nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass die Platte (22) und/oder der Kranz (23) Vertiefungen (22A, 23A) zur Aufnahme des Endes der Stege (20) aufweisen.
  15. Verteiler nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, dass die Arme oder die Stege (20A) mit einem abnehmbaren, vorteilhafterweise U-förmigen Mantel (20B) bedeckt sind, der aus einem verschleißfesten Werkstoff hoher Härte hergestellt ist.
  16. Strahlmitteleinlasssystem für eine Zentrifugalstrahlturbine, wobei dieses System mindestens ein Steuerstück nach einem der Ansprüche 1 bis 9 umfasst.
  17. System nach Anspruch 16, dadurch gekennzeichnet, dass es mindestens ein Steuerstück (1) nach einem der Ansprüche 2 bis 9 und einen Verteiler (2) umfasst, der dazu bestimmt ist, bezüglich des Steuerstücks (1) drehbar montiert zu werden, wobei dieser Verteiler (2) ein Verteiler nach einem der Ansprüche 10 bis 15 ist.
  18. System nach Anspruch 16 oder 17, dadurch gekennzeichnet, dass die Arme des Verteilers aus Stegen (20) bestehen, die aus einem Werkstoff hergestellt sind, der eine Abriebfestigkeit aufweist, die mindestens im Wesentlichen gleich der der Schutzstäbe (6) des Steuerstücks (1) ist.
  19. System nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, dass die Arme oder die Stege mit einem abnehmbaren, vorteilhafterweise U-förmigen Mantel (20B) bedeckt sind, der aus einem verschleißfesten Werkstoff hoher Härte hergestellt ist.
  20. Zentrifugalstrahlturbine, umfassend ein System nach einem der Ansprüche 15 bis 19.
  21. Strahlverfahren, bei dem man eine Turbine nach dem vorhergehenden Anspruch verwendet.
  22. Strahlverfahren nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass man bei dem Austausch einer oder mehrerer abgenutzter Schaufeln der Turbine die Kontrolle und die Ersetzung der Seite von abgenutzten Stäben durch eine Seite von nicht abgenutzten Stäben oder durch eine nicht abgenutzte Seite der Stäbe und/oder der abgenutzten Seite eines Stegs durch eine nicht abgenutzte Seite eines Stegs und/oder der abgenutzten Seite eines Mantels durch eine nicht abgenutzte Seite eines Mantels vornimmt.
EP03447269A 2002-11-04 2003-10-30 Kontrollstück und Verteiler zur Materialzuführung zur Sandstrahlanlage mit Schleuderrad und dessen Anwendung Expired - Lifetime EP1419854B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2002/0628A BE1015168A3 (fr) 2002-11-04 2002-11-04 Piece de controle et distributeur pour alimentation de turbine de grenaillage centrifuge et leur utilisation.
BE200200628 2002-11-04

Publications (2)

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

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EP03447269A Expired - Lifetime EP1419854B1 (de) 2002-11-04 2003-10-30 Kontrollstück und Verteiler zur Materialzuführung zur Sandstrahlanlage mit Schleuderrad und dessen Anwendung

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6949014B2 (en) 2003-11-17 2005-09-27 Wheelabrator Group, Inc. Control cage for abrasive blast wheel
EP2826593B1 (de) * 2013-07-19 2016-03-30 Prefer - Equipamentos Para Decapagem LDA. Strahlturbine und Komponenten

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9401617D0 (en) * 1994-01-28 1994-03-23 Philippson Anthony P Abrasive throwing wheel

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BE1015168A3 (fr) 2004-10-05
DE60309813T2 (de) 2007-08-02
DE60309813D1 (de) 2007-01-04
ATE345901T1 (de) 2006-12-15
EP1419854A1 (de) 2004-05-19

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