EP0673719A1 - Impeller wheel with fixed impeller wheel shovels - Google Patents

Impeller wheel with fixed impeller wheel shovels Download PDF

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Publication number
EP0673719A1
EP0673719A1 EP95104253A EP95104253A EP0673719A1 EP 0673719 A1 EP0673719 A1 EP 0673719A1 EP 95104253 A EP95104253 A EP 95104253A EP 95104253 A EP95104253 A EP 95104253A EP 0673719 A1 EP0673719 A1 EP 0673719A1
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EP
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Prior art keywords
blades
centrifugal wheel
wheel
centrifugal
side windows
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EP95104253A
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German (de)
French (fr)
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EP0673719B1 (en
Inventor
Horst-Dieter Schlick
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SCHLICK-Roto-Jet Maschinenbau GmbH
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SCHLICK-Roto-Jet Maschinenbau GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00Devices or accessories for generating abrasive blasts
    • B24C5/06Impeller wheels; Rotor blades therefor
    • B24C5/062Rotor blades or vanes; Locking means therefor

Definitions

  • centrifugal wheel is known, for example, from AT-PS 278 569.
  • the fastening mechanism is relatively complex and can no longer be used if it is used for a long time.
  • the known centrifugal wheel is provided with blades, which are preferably made by casting. Cast blades are subject to greater wear due to the finest porosity.
  • centrifugal wheels are known from US-PS 34 44 651 and from DE-OS 21 61 888. Both known designs work with screw connections and auxiliary elements in the side windows. There are therefore relatively complicated assembly and disassembly operations required.
  • centrifugal wheel of the type mentioned which is characterized in that the centrifugal wheel blades are made from a section of a symmetrical rolled profile and contain at least one threaded hole made in a flank from the side thereof, and that in the side windows of the outside of the side window are accessible holding holes that coincide with the threaded holes and each contain the head of a screw that is screwed into the threaded hole.
  • the profile sections are easily and reliably attached and exchangeable. In comparison to cast blades, which have the porosities mentioned, the rolled blades have the same or even a longer service life, despite the cheaper material.
  • the simple attachment of the blades with one or two screws enables simple and quick replacement.
  • the rolled profile preferably has widened flanks in the form of an H profile, which are preferably fitted into grooves that are present in the side windows.
  • the rolled profile In the area of the surfaces coming into contact with the blasting material, the rolled profile can be rolled compacted, so that there it is practically free of porosities has a low coefficient of friction and hardened surface.
  • FIG. 1 schematically shows an axial half-section of a centrifugal wheel 200 placed on a shaft journal 1 of a drive (eg electric motor - not shown).
  • a distributor wheel 100 can be seen, two side disks 4, 5 arranged in parallel at a mutual distance and between the Side discs arranged, radially to the axis of rotation 23 of the centrifugal wheel arranged centrifugal wheel blades 6 as basic elements.
  • the distributor wheel consists of a partially open impeller sleeve 3 and an impeller base 2 which is screwed onto the shaft journal 1 by means of a central screw 8.
  • the impeller sleeve 3 has an inner flange 10 which is overlapped by the periphery of the impeller base 2, which is provided with a recess 12, so that when the central screw is tightened, the base is pressed together with the impeller sleeve in the direction of the shaft journal.
  • the impeller sleeve 3 has a plurality of slit-shaped windows 13, which are arranged parallel to their surface line at equal intervals. The arrangement of the windows 13 can be seen in FIG. 2.
  • the diameter of the recess 12 corresponds to the inner diameter of the inner flange 10; this ensures that the impeller sleeve 3 is exactly centered on the shaft axis. Furthermore, the impeller base 2 is provided with a central, enlarged opening 21, into which a head 22 of the screw 8 is inserted, a resilient washer 9 preventing the screw 8 from loosening.
  • the surface 11 of the impeller base 2 throws the blasting agent flowing in along the axis of rotation 23 in the direction of the centrifugal wheel circumference, as a result of which turbulence in the entrained air inside the distributor wheel can be reduced.
  • the distributor wheel 100 is secured against turning relative to the shaft journal 1 by grub screws 15. These grub screws are screwed into bores 14 which are made in the bottom region of the impeller sleeve and then let into matching bores 17 of a side window 5.
  • the side window 5 made in one piece with a hub 16 placed directly on the shaft journal 1.
  • the second side window 4 is held by spacers 7 at a fixed distance from the side window 5. The distance is precisely adapted to the width of the centrifugal wheel blades 6.
  • the inside of the two side disks 4, 5 are provided with radially arranged grooves 24 into which the flanks 27, 27 'of the centrifugal wheel blades 6 are inserted (FIGS. 3 and 4).
  • the flanks are provided with threaded bores 29 from the side.
  • centrifugal wheel blades are fixed in and on the side windows 4, 5 by screwing screws 25 into the threaded bores 29 of the blades 6 through a bore 28 in the side window 4, which surrounds the head 30 of the screw that has been screwed in.
  • a fixing screw could also be screwed into the centrifugal wheel blade from the side window 5; however, in view of easier access, the external access shown in the drawing has been chosen.
  • the blade 6 has reinforced flanks 27, 27 ′ arranged on both sides, which project beyond the two front and rear surfaces 31, 32 of the blades by the same amount.
  • This arrangement of the surfaces of the blades and the lateral attachment of the blades enable the centrifugal wheel to be rotated in both directions. It can therefore be assumed that the centrifugal wheel blades have a double symmetry, namely once to a plane of symmetry E1, which is parallel to the throwing surfaces, and secondly to a plane of symmetry E2, which lies to a plane of symmetry lying centrally between the side windows.
  • the planes of symmetry E1 and E2 are shown in FIG. 4.
  • a rolled profile 40 which is shown in half in FIG. 4, is outstandingly suitable for producing such blades. These are only made from cut sections of such a rolled profile.
  • this rolled profile is also rolled compacted on the surfaces that come into contact with the blasting material, so that the coefficient of friction is reduced there, with a considerably lower wear on the surface than with known casting materials. It therefore comes to the seemingly paradoxical result that a softer material (rolled material) has a longer service life than casting material, as is known from the prior art.
  • the function of the centrifugal wheel 200 is explained as follows:
  • the abrasive particle Due to a considerable speed - approximately 2100 rpm - of the distributor wheel 100, the abrasive particle is given a high speed, ie approximately 4000 m / min. The granular, abrasive particles wear the sleeve 3 and the impeller blades 6, which therefore have to be replaced relatively often.
  • a front wall of the housing (not shown) is unscrewed and dismantled together with the pipe bend 18 and the regulator basket 20 so that the head 22 of the central screw 8 is made accessible.
  • centrifugal wheel blades 6 are exchanged in a similarly simple manner. In these cases, only access to the screws 25 is required, which is obtained by unscrewing the aforementioned housing wall. After the screw 25 has been removed from the bore 28, the centrifugal wheel blades can be pulled out of the guide grooves and a new set of blades can then be inserted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Centrifugal Separators (AREA)

Abstract

The spinner wheel (200) has a centrally mounted distributor wheel (100) and two mutually spaced side discs (4,5) set parallel on same. The blades (6) mounted between the side discs are made from a section of a symmetrical rolled profiled section and contain at least one threaded bore which is set in from the side. Holding bores are set in the side discs accessible from the outside of same and coincide with the threaded bores. The holding bores each enclose the head of a screw (25) which is screwed in the threaded bore. The rolling profiled section of the blades has a compacted rolled surface in the area of the faces coming into contact with the spray material. The blades are symmetrical relative to a plane of symmetry lying centrally between the side discs.

Description

Die Erfindung betrifft ein Schleuderrad für eine Schleuderstrahlanlage zur Oberflächenbehandlung von Gegenständen, bestehend aus

  • einem zentrisch angeordneten Verteilerrad,
  • zwei in gegenseitigem Abstand und parallel am Verteilerrad angeordneten Seitenscheiben,
  • und zwischen den Seitenscheiben angeordneten, radial zur Drehachse des Schleuderrades ausgerichteten Schleuderrad-Schaufeln, die an ihren Flanken an den Seitenscheiben über Sicherungselemente fixiert gehalten sind.
The invention relates to a centrifugal wheel for a centrifugal blasting system for the surface treatment of objects, consisting of
  • a centrally arranged distributor wheel,
  • two side disks spaced apart and parallel to the distributor wheel,
  • and arranged between the side windows, radially aligned with the axis of rotation of the centrifugal wheel centrifugal vanes, which are held on their flanks on the side windows via locking elements.

Ein derartiges Schleuderrad ist beispielsweise bekannt aus der AT-PS 278 569. Bei dem bekannten Schleuderrad ist der Befestigungsmechanismus relativ aufwendig und bei längerer Einsatzdauer auch nicht mehr brauchbar. Das bekannte Schleuderrad ist mit Schaufeln versehen, die vorzugsweise im Gußverfahren hergestellt sind. Gegossene Schaufeln unterliegen durch feinste Porositäten einem höheren Verschleiß.Such a centrifugal wheel is known, for example, from AT-PS 278 569. In the known centrifugal wheel, the fastening mechanism is relatively complex and can no longer be used if it is used for a long time. The known centrifugal wheel is provided with blades, which are preferably made by casting. Cast blades are subject to greater wear due to the finest porosity.

Weiterhin sind derartige Schleuderräder aus der US-PS 34 44 651 und aus der DE-OS 21 61 888 bekannt. Beide bekannte Ausführungsarten arbeiten mit Verschraubungen und Hilfselementen in den Seitenscheiben. Es sind demnach relativ komplizierte Montage- und Demontagearbeitsgänge erforderlich.Furthermore, such centrifugal wheels are known from US-PS 34 44 651 and from DE-OS 21 61 888. Both known designs work with screw connections and auxiliary elements in the side windows. There are therefore relatively complicated assembly and disassembly operations required.

Es stellt sich demnach die Aufgabe, ein Schleuderrad anzugeben, das preisgünstig und mit wenigen Montageschritten mit einer neuen Beschaufelung versehen werden kann.It is therefore the task of specifying a centrifugal wheel which can be provided with a new blading in a cost-effective manner and with a few assembly steps.

Diese Aufgabe wird gelöst bei einem Schleuderrad der eingangs genannten Art, das dadurch gekennzeichnet ist, daß die Schleuderrad-Schaufeln aus einem Abschnitt eines symmetrischen Walzprofils hergestellt sind und wenigstens eine in eine Flanke von deren Seite her eingebrachte Gewindebohrung enthalten, und daß in den Seitenscheiben von der Außenseite der Seitenscheibe her zugängliche Haltebohrungen vorhanden sind, die mit den Gewindebohrungen koinzidieren und jeweils den Kopf einer Schraube enthalten, die in der Gewindebohrung verschraubt ist.This object is achieved in a centrifugal wheel of the type mentioned, which is characterized in that the centrifugal wheel blades are made from a section of a symmetrical rolled profile and contain at least one threaded hole made in a flank from the side thereof, and that in the side windows of the outside of the side window are accessible holding holes that coincide with the threaded holes and each contain the head of a screw that is screwed into the threaded hole.

Die Profilabschnitte sind einfach und zuverlässig befestigt und austauschbar. Die gewalzten Schaufeln sind im Vergleich zu gegossenen, die die erwähnten Porositäten besitzen, trotz des preisgünstigeren Materials gleich oder sogar länger haltbar. Die unkomplizierte Befestigung der Schaufeln mit einer oder zwei Schrauben ermöglicht einen einfachen und schnellen Austausch.The profile sections are easily and reliably attached and exchangeable. In comparison to cast blades, which have the porosities mentioned, the rolled blades have the same or even a longer service life, despite the cheaper material. The simple attachment of the blades with one or two screws enables simple and quick replacement.

Vorzugsweise besitzt das Walzprofil in Form eines H-Profils verbreiterte Flanken, die vorzugsweise in Nuten eingepaßt liegen, die in den Seitenscheiben vorhanden sind.The rolled profile preferably has widened flanks in the form of an H profile, which are preferably fitted into grooves that are present in the side windows.

Im Bereich der mit dem Strahlmaterial in Kontakt kommenden Flächen kann das Walzprofil verdichtet gewalzt sein, so daß es dort eine praktisch von Porositäten freie, mit geringem Reibungskoeffizienten versehene und gehärtetete Oberfläche besitzt.In the area of the surfaces coming into contact with the blasting material, the rolled profile can be rolled compacted, so that there it is practically free of porosities has a low coefficient of friction and hardened surface.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt. Die Figuren der Zeichnung zeigen im einzelnen:

Fig. 1
einen axialen Halbschnitt eines Schleuderrades mit einem Verteilerrad;
Fig. 2
ein Detailquerschnitt (C - C) durch die Hülse und den Boden des Verteilerrades;
Fig. 3
eine Befestigung der Schleuderrad-Schaufeln an einer Seitenscheibe in Draufsicht und
Fig. 4
ein Detail der Befestigung gemäß Fig. 3 (A - A) im Querschnitt.
Embodiments of the invention are shown in the drawing. The figures in the drawing show in detail:
Fig. 1
an axial half-section of a centrifugal wheel with a distributor wheel;
Fig. 2
a detailed cross section (C - C) through the sleeve and the bottom of the distributor wheel;
Fig. 3
an attachment of the impeller blades on a side window in plan view and
Fig. 4
a detail of the attachment of FIG. 3 (A - A) in cross section.

Fig. 1 stellt schematisch einen axialen Halbschnitt eines auf einen Wellenzapfen 1 eines Antriebs (z. B. Elektromotors - nicht dargestellt) aufgesetzten Schleuderrads 200 dar. Zu erkennen ist ein Verteilerrad 100, zwei in gegenseitigem Abstand parallel angeordnete Seitenscheiben 4, 5 und zwischen den Seitenscheiben angeordnete, radial zur Drehachse 23 des Schleuderrades angeordnete Schleuderrad-Schaufeln 6 als Basiselemente.1 schematically shows an axial half-section of a centrifugal wheel 200 placed on a shaft journal 1 of a drive (eg electric motor - not shown). A distributor wheel 100 can be seen, two side disks 4, 5 arranged in parallel at a mutual distance and between the Side discs arranged, radially to the axis of rotation 23 of the centrifugal wheel arranged centrifugal wheel blades 6 as basic elements.

Das Verteilerrad besteht aus einer teilweise offenen Impellerhülse 3 und einem Impellerboden 2, der mittels einer zentralen Schraube 8 an den Wellenzapfen 1 angeschraubt ist. Die Impellerhülse 3 weist einen Innenflansch 10 auf, der von der Peripherie des Impellerbodens 2, die mit einem Rezeß 12 versehen ist, überlappt ist, so daß bei Anzug der zentralen Schraube der Boden zusammen mit der Impellerhülse in Richtung Wellenzapfen gedrückt ist.The distributor wheel consists of a partially open impeller sleeve 3 and an impeller base 2 which is screwed onto the shaft journal 1 by means of a central screw 8. The impeller sleeve 3 has an inner flange 10 which is overlapped by the periphery of the impeller base 2, which is provided with a recess 12, so that when the central screw is tightened, the base is pressed together with the impeller sleeve in the direction of the shaft journal.

Die Impellerhülse 3 weist mehrere schlitzförmige Fenster 13 auf, die parallel zu ihrer Mantellinie in gleichen Abständen angeordnet sind. Die Anordnung der Fenster 13 ist der Figur 2 zu entnehmen.The impeller sleeve 3 has a plurality of slit-shaped windows 13, which are arranged parallel to their surface line at equal intervals. The arrangement of the windows 13 can be seen in FIG. 2.

Der Durchmesser des Rezesses 12 entspricht dem inneren Durchmesser des Innenflansches 10; damit wird sichergestellt, daß die Impellerhülse 3 genau zentriert zur Wellenachse liegt. Weiterhin ist der Impellerboden 2 mit einer zentralen, ausgeweiteten Öffnung 21 versehen, in die ein Kopf 22 der Schraube 8 eingelassen ist, wobei eine federnde Unterlegscheibe 9 das Lockern der Schraube 8 verhindert.The diameter of the recess 12 corresponds to the inner diameter of the inner flange 10; this ensures that the impeller sleeve 3 is exactly centered on the shaft axis. Furthermore, the impeller base 2 is provided with a central, enlarged opening 21, into which a head 22 of the screw 8 is inserted, a resilient washer 9 preventing the screw 8 from loosening.

Durch Luft mitgeführtes Strahlmittel wird gegenüber dem Wellenzapfen 1 in die Impellerhülse 3 eingedrückt (Pfeile P). Im Hinblick auf die Aufgabe des Verteilerrades 100 und der Impellerhülse 3, das zugeführte Strahlmittel aufzunehmen und weiterzuverteilen, ist der Impellerboden 2 mit einem Neigungswinkel von α = 45° konisch gestaltet, wobei er in Richtung der Pfeile P konvergiert.Blasting agent carried by air is pressed into the impeller sleeve 3 with respect to the shaft journal 1 (arrows P). With regard to the task of the distributor wheel 100 and the impeller sleeve 3 to receive and further distribute the blasting medium supplied, the impeller base 2 is designed conically with an inclination angle of α = 45 °, converging in the direction of the arrows P.

Die Oberfläche 11 des Impellerbodens 2 wirft das längs der Drehachse 23 zufließende Strahlmittel in Richtung des Schleuderrad-Umfanges, wodurch sich Turbulenzen bei der mitgeführten Luft im Inneren des Verteilerrades verringern lassen.The surface 11 of the impeller base 2 throws the blasting agent flowing in along the axis of rotation 23 in the direction of the centrifugal wheel circumference, as a result of which turbulence in the entrained air inside the distributor wheel can be reduced.

Das Verteilerrad 100 ist durch Madenschrauben 15 gegen ein Verdrehen gegenüber dem Wellenzapfen 1 gesichert. Diese Madenschrauben werden in Bohrungen 14, die im Bodenbereich der Impellerhülse hergestellt sind, eingeschraubt und danach in passende Bohrungen 17 einer Seitenscheibe 5 eingelassen.The distributor wheel 100 is secured against turning relative to the shaft journal 1 by grub screws 15. These grub screws are screwed into bores 14 which are made in the bottom region of the impeller sleeve and then let into matching bores 17 of a side window 5.

Wie aus der Fig. 1 zu ersehen ist, ist die Seitenscheibe 5 einstückig mit einer direkt auf den Wellenzapfen 1 aufgesetzten Nabe 16 hergestellt. Die zweite Seitenscheibe 4 wird durch Distanzelemente 7 in festgelegtem Abstand von der Seitenscheibe 5 gehalten. Der Abstand ist an die Breite der Schleuderrad-Schaufeln 6 genau angepaßt.As can be seen from Fig. 1, the side window 5 made in one piece with a hub 16 placed directly on the shaft journal 1. The second side window 4 is held by spacers 7 at a fixed distance from the side window 5. The distance is precisely adapted to the width of the centrifugal wheel blades 6.

Die Innenseiten der beiden Seitenscheiben 4, 5 sind mit radial angeordneten Nuten 24 versehen, in die die Flanken 27, 27' der Schleuderrad-Schaufeln 6 eingeschoben werden (Fig. 3 und 4). Die Flanken sind mit von der Seite her eingebrachten Gewindebohrungen 29 versehen.The inside of the two side disks 4, 5 are provided with radially arranged grooves 24 into which the flanks 27, 27 'of the centrifugal wheel blades 6 are inserted (FIGS. 3 and 4). The flanks are provided with threaded bores 29 from the side.

Das Fixieren der Schleuderrad-Schaufeln in und an den Seitenscheiben 4, 5 erfolgt durch das Einschrauben von Schrauben 25 in die Gewindebohrungen 29 der Schaufeln 6 durch eine Bohrung 28 in der Seitenscheibe 4, die den Kopf 30 der eingedrehten Schraube umschließt.The centrifugal wheel blades are fixed in and on the side windows 4, 5 by screwing screws 25 into the threaded bores 29 of the blades 6 through a bore 28 in the side window 4, which surrounds the head 30 of the screw that has been screwed in.

Eine Fixierschraube könnte konstruktiv auch von der Seitenscheibe 5 her in die Schleuderrad-Schaufel eingeschraubt werden; jedoch ist mit Rücksicht auf einen leichteren Zugang der in der Zeichnung dargestellte Zugang von außen gewählt worden.A fixing screw could also be screwed into the centrifugal wheel blade from the side window 5; however, in view of easier access, the external access shown in the drawing has been chosen.

Wie aus dem Querschnitt gemäß Fig. 4 ersichtlich ist, weist die Schaufel 6 beidseitig angeordnete verstärkte Flanken 27, 27' auf, die die beiden vorderen und hinteren Oberflächen 31, 32 der Schaufeln um den gleichen Betrag überragen. Diese Anordnung der Oberflächen der Schaufeln sowie die seitliche Befestigung der Schaufeln ermöglichen die Drehung des Schleuderrades in beide Richtungen. Es ist demnach davon auszugehen, daß die Schleuderradschaufeln eine zweifache Symmetrie aufweisen, nämlich einmal zu einer symmetrieebene E1, die parallel zu den Wurfflächen liegt, und zum anderen zu einer Symmetrieebene E2, die zu einer mittig zwischen den Seitenscheiben liegenden Symmetrieebene liegt. Die Symmetrieebenen E1 und E2 sind in Fig. 4 dargestellt.As can be seen from the cross section according to FIG. 4, the blade 6 has reinforced flanks 27, 27 ′ arranged on both sides, which project beyond the two front and rear surfaces 31, 32 of the blades by the same amount. This arrangement of the surfaces of the blades and the lateral attachment of the blades enable the centrifugal wheel to be rotated in both directions. It can therefore be assumed that the centrifugal wheel blades have a double symmetry, namely once to a plane of symmetry E1, which is parallel to the throwing surfaces, and secondly to a plane of symmetry E2, which lies to a plane of symmetry lying centrally between the side windows. The planes of symmetry E1 and E2 are shown in FIG. 4.

Demnach eignet sich in hervorragender Weise ein Walzprofil 40, das hälftig in Fig. 4 dargestellt ist, zur Herstellung derartiger Schaufeln. Diese werden lediglich aus abgelängten Abschnitten eines solchen Walzprofils hergestellt. Dieses Walzprofil ist im vorliegenden Ausführungsbeispiel an den mit dem Strahlmaterial in Kontakt kommenden Flächen auch verdichtet gewalzt, so daß der Reibungskoeffizient dort herabgesetzt ist, wobei ein wesentlich niedrigerer Verschleiß als bei bekannten Gußmaterialien an der Oberfläche erreicht wird. Es kommt daher zu dem scheinbar paradoxen Ergebnis, daß ein weicheres Material (gewalztes Material) eine längere Standzeit hat als Gußmaterial, wie es aus dem Stand der Technik bekannt ist.Accordingly, a rolled profile 40, which is shown in half in FIG. 4, is outstandingly suitable for producing such blades. These are only made from cut sections of such a rolled profile. In the present exemplary embodiment, this rolled profile is also rolled compacted on the surfaces that come into contact with the blasting material, so that the coefficient of friction is reduced there, with a considerably lower wear on the surface than with known casting materials. It therefore comes to the seemingly paradoxical result that a softer material (rolled material) has a longer service life than casting material, as is known from the prior art.

Die Funktion des Schleuderrades 200 wird wie folgt erläutert:
Das von außen durch einen Rohrbogen 18 zugeführte Strahlmittel, z. B. Stahlschrot oder Quarzsand, gelangt in das Innere des rotierenden Verteilerrades 100 (vgl. Pfeile P). Durch die geneigten Oberflächen 11 des Bodens 2 wird es in Richtung Fenster 13 der Impellerhülse 3 und der Fenster 19 eines die Hülse umfassenden Reglerkorbs 20 abgelenkt.
The function of the centrifugal wheel 200 is explained as follows:
The blasting medium supplied from the outside through a pipe bend 18, e.g. B. steel shot or quartz sand, gets into the interior of the rotating distributor wheel 100 (cf. arrows P). Due to the inclined surfaces 11 of the base 2, it is deflected in the direction of the window 13 of the impeller sleeve 3 and the window 19 of a controller basket 20 comprising the sleeve.

Durch eine erhebliche Drehzahl - etwa 2100 U/min - des Verteilerrades 100 wird dem Strahlmittelteilchen eine große Geschwindigkeit, d. h. etwa 4000 m/min aufgegeben. Die körnigen, abrasiven Teilchen verschleißen die Hülse 3 und die Schleuderrad-Schaufeln 6, die daher relativ oft ausgetauscht werden müssen.Due to a considerable speed - approximately 2100 rpm - of the distributor wheel 100, the abrasive particle is given a high speed, ie approximately 4000 m / min. The granular, abrasive particles wear the sleeve 3 and the impeller blades 6, which therefore have to be replaced relatively often.

Soll die verschlissene Impellerhülse 3 ausgetauscht werden, wird eine vordere Wand des Gehäuses (nicht dargestellt) abgeschraubt und zusammen mit dem Rohrbogen 18 und dem Reglerkorb 20 demontiert, damit der Kopf 22 der Zentralschraube 8 zugänglich gemacht ist.If the worn impeller sleeve 3 is to be replaced, a front wall of the housing (not shown) is unscrewed and dismantled together with the pipe bend 18 and the regulator basket 20 so that the head 22 of the central screw 8 is made accessible.

Ähnlich einfach werden die Schleuderrad-Schaufeln 6 ausgetauscht. Für diese Fälle ist nur der Zugang zu den Schrauben 25 erforderlich, der durch das Abschrauben der vorgenannten Gehäusewand erlangt wird. Nach dem Herausnehmen der Schraube 25 aus der Bohrung 28 können die Schleuderrad-Schaufeln aus den Führungsnuten herausgezogen werden und anschließend ein neuer Satz Schaufeln eingesetzt werden.The centrifugal wheel blades 6 are exchanged in a similarly simple manner. In these cases, only access to the screws 25 is required, which is obtained by unscrewing the aforementioned housing wall. After the screw 25 has been removed from the bore 28, the centrifugal wheel blades can be pulled out of the guide grooves and a new set of blades can then be inserted.

Claims (5)

Schleuderrad (200) für eine Schleuderstrahlanlage zur Oberflächenbehandlung von Gegenständen, bestehend aus - einem zentrisch angeordneten Verteilerrad (100), - zwei in gegenseitigem Abstand und parallel am Verteilerrad angeordneten Seitenscheiben (4, 5), - und zwischen den Seitenscheiben angeordneten, radial zur Drehachse des Schleuderrades ausgerichteten Schleuderrad-Schaufeln (6), die an ihren Flanken an den Seitenscheiben (4,5,) über Sicherungselemente fixiert gehalten sind, dadurch gekennzeichnet, daß
die Schleuderrad-Schaufeln (6) aus einem Abschnitt eines symmetrischen Walzprofils (40) hergestellt sind, wenigstens eine in eine Flanke von deren Seite her eingebrachte Gewindebohrung (29) enthalten, und daß in den Seitenscheiben (4, 5) von der Außenseite der Seitenscheibe her zugängliche Haltebohrungen (28) vorhanden sind, die mit den Gewindebohrungen (29) koinzidieren und jeweils den Kopf (30) einer Schraube (25) umfassen, die in der Gewindebohrung verschraubt ist.
Centrifugal wheel (200) for a centrifugal blasting system for surface treatment of objects, consisting of - a centrally arranged distributor wheel (100), - two side disks (4, 5) arranged at a mutual distance and parallel to the distributor wheel, and arranged between the side windows, radially aligned with the axis of rotation of the centrifugal wheel, centrifugal wheel blades (6), which are held on their flanks on the side windows (4, 5,) by means of securing elements, characterized in that
the centrifugal wheel blades (6) are made from a section of a symmetrical rolled profile (40), contain at least one threaded bore (29) made in a flank from the side thereof, and that in the side windows (4, 5) from the outside of the side window forth accessible holding bores (28) are present, which coincide with the threaded bores (29) and each comprise the head (30) of a screw (25) which is screwed into the threaded bore.
Schleuderrad nach Anspruch 1, dadurch gekennzeichnet, daß die Schaufelflanken (27, 27') gegenüber dem übrigen Schaufelprofil verbreitert sind.Centrifugal wheel according to claim 1, characterized in that the blade flanks (27, 27 ') are widened compared to the remaining blade profile. Schleuderrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in den Seitenscheiben Nuten (24) vorhanden sind, in denen die Flanken (27,27') liegen.Centrifugal wheel according to claim 1 or 2, characterized in that there are grooves (24) in the side windows in which the flanks (27, 27 ') lie. Schleuderrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Walzprofil der Schaufeln im Bereich der mit dem Strahlmaterial in Kontakt kommenden Flächen mit einer verdichtet gewalzten Oberfläche versehen ist.Centrifugal wheel according to claim 1 or 2, characterized in that the rolled profile of the blades in Area of the surfaces that come into contact with the blasting material is provided with a densely rolled surface. Schleuderrad nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Schaufeln (6) zu einer mittig zwischen den Seitenscheiben liegenden Symmetrieebene (E2) in sich symmetrisch sind.Centrifugal wheel according to claim 1 or 3, characterized in that the blades (6) are symmetrical in themselves to a plane of symmetry (E2) lying centrally between the side windows.
EP95104253A 1994-03-26 1995-03-23 Impeller wheel with fixed impeller wheel shovels Expired - Lifetime EP0673719B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4410628 1994-03-26
DE4410628A DE4410628C2 (en) 1994-03-26 1994-03-26 Centrifugal wheel with fixed centrifugal wheel blades

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EP0673719A1 true EP0673719A1 (en) 1995-09-27
EP0673719B1 EP0673719B1 (en) 1998-05-27

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1380387A1 (en) * 2002-07-12 2004-01-14 Jennifer Schlick Abrasive blasting device
KR100939339B1 (en) 2003-06-19 2010-01-29 주식회사 포스코 Impeller apparatus for distributing shot balls with improved spouting efficiency
CN108161768A (en) * 2018-01-17 2018-06-15 济南大学 Wet method impeller head
CN113927493A (en) * 2021-11-03 2022-01-14 芜湖美特方材料科技有限公司 Impeller for centrifugal shot blasting of zirconia and silica shot

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29706888U1 (en) * 1997-04-16 1997-05-28 Schlick Roto-Jet Maschinenbau GmbH, 48629 Metelen Centrifugal wheel for a centrifugal blasting machine for the surface treatment of objects
DE19752549C1 (en) * 1997-11-27 1999-04-08 Schlick Roto Jet Masch Centrifugal particle blast wheel for surface treatment
DE10104703C1 (en) * 2001-02-02 2001-12-06 Schlick Jennifer Material acceleration device for workpiece surface treatment has material jet sleeve and concentric jet limitation sleeve rotated for aligning respective openings and defining treatment jet angle

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US2119813A (en) * 1936-05-13 1938-06-07 Pangborn Corp Abrading apparatus
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel
US3867791A (en) * 1974-05-13 1975-02-25 James R Goff Abrasive blasting machine
US4329819A (en) * 1980-04-18 1982-05-18 Ervin Industries, Inc. Centrifugal blasting apparatus
EP0094371A2 (en) * 1982-04-26 1983-11-16 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Method of making tempered blades for impeller wheels
US4646483A (en) * 1985-10-07 1987-03-03 Pangborn Corporation Vanes for abrasive blasting wheels

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AT278569B (en) * 1966-07-22 1970-02-10 Wheelabrator Corp SHOVEL FOR EJECTORS
DE2161888A1 (en) * 1971-12-14 1973-06-20 Rudolf Matzke FASTENING OF THE BLOWING BLADES TO BEAGING DISCS

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Publication number Priority date Publication date Assignee Title
US2119813A (en) * 1936-05-13 1938-06-07 Pangborn Corp Abrading apparatus
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel
US3867791A (en) * 1974-05-13 1975-02-25 James R Goff Abrasive blasting machine
US4329819A (en) * 1980-04-18 1982-05-18 Ervin Industries, Inc. Centrifugal blasting apparatus
EP0094371A2 (en) * 1982-04-26 1983-11-16 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Method of making tempered blades for impeller wheels
US4646483A (en) * 1985-10-07 1987-03-03 Pangborn Corporation Vanes for abrasive blasting wheels

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1380387A1 (en) * 2002-07-12 2004-01-14 Jennifer Schlick Abrasive blasting device
KR100939339B1 (en) 2003-06-19 2010-01-29 주식회사 포스코 Impeller apparatus for distributing shot balls with improved spouting efficiency
CN108161768A (en) * 2018-01-17 2018-06-15 济南大学 Wet method impeller head
CN113927493A (en) * 2021-11-03 2022-01-14 芜湖美特方材料科技有限公司 Impeller for centrifugal shot blasting of zirconia and silica shot

Also Published As

Publication number Publication date
DE4410628C2 (en) 1996-09-19
DE4410628A1 (en) 1995-09-28
DE59502300D1 (en) 1998-07-02
EP0673719B1 (en) 1998-05-27

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