EP1318890B1 - Device for accelerating abrasives - Google Patents

Device for accelerating abrasives Download PDF

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Publication number
EP1318890B1
EP1318890B1 EP01967264A EP01967264A EP1318890B1 EP 1318890 B1 EP1318890 B1 EP 1318890B1 EP 01967264 A EP01967264 A EP 01967264A EP 01967264 A EP01967264 A EP 01967264A EP 1318890 B1 EP1318890 B1 EP 1318890B1
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EP
European Patent Office
Prior art keywords
blades
impeller
rotation
axis
feed line
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
EP01967264A
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German (de)
French (fr)
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EP1318890A1 (en
Inventor
Jost Wadephul
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Individual
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Individual
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Classifications

    • 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
    • B24C5/062—Rotor blades or vanes; Locking means therefor
    • 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 invention relates to a device for accelerating of blasting agent with a blast wheel, the order a rotation axis is driven in rotation and substantially radially aligned with the axis of rotation blades and a side window on which the blades are held with a margin, as well as with at least a supply line for the abrasive, the mouth outside of the axis of rotation of the blast wheel to the free side edges of the blades of the spinner borders.
  • the blasting agent is laterally in the effective range fed to the blades of the blast wheel.
  • the blades are with a side edge on the Side window, on which the drive elements of the Impact wheel acting, held the blast wheel, while the other or free side edge of the blades of the rotating impeller at the mouth of Supply line for the blasting medium passes.
  • These Type of feeding of blasting medium into the blast wheel can cause damage, especially of its Shovels lead when the fed blasting agent larger contaminants such as nuts or Bolt contains, as when passing the blades at the opening of the supply line a "pinch edge" arises, the smaller or narrower than these impurities is. Further, when passing the blades at this opening the inflow of the blasting agent briefly interrupted.
  • the blasting agent is the blast wheel in the area of the inner to the hub of the blast wheel fed to adjacent ends of the blades.
  • the trained as a chamfered channel Opening the supply line in the effective range of the blades which pass past this opening with a correspondingly shaped inner end.
  • This type of feeding the blasting medium into the interior of the blast wheel has the same drawbacks that occur in the device known from US-PS 2 363 437, as when passing the blades on the trough-shaped opening of the supply line as well a "pinch edge" arises.
  • the object of the invention is now to provide a device for accelerating blasting agent in the blasting media with foreign bodies that are larger than the blasting medium, fed can be without causing breakage damage to the blast wheel.
  • the blast wheel shown in Figures 1 and 2 8 is surrounded by a housing 10, in which a supply line 6 opens, with the blasting agent such as quartz sand or steel shot is fed to the blast wheel 8. Opposite the feed side for the blasting agent protrudes the drive shaft 5 of the blast wheel 8 from the housing 10 out.
  • the blast wheel 8 has a side window 4, which is fixed to a drive shaft 5 and on the blades of the drive shaft 5 opposite surface 2 carries, the inner ends of a sleeve-shaped Adjacent rotational body 1.
  • the hub of the blower wheel 8 forming rotating body 1 is in the center of Impeller 8 provided and non-rotatably with the drive shaft 5 and the side window 4 connected.
  • the housing 10 occurs radially laterally from the rotary body 1, the supply line 6, the mouth 7 to the free Side edges of the blades 2 of the blast wheel 8 adjacent.
  • incisions 3 are formed, the opposite of the mouth 7.
  • the cuts 3 may also be curved, with the curvature with a bulge may be provided, extending in radial Direction from the center of the blast wheel 8 via the mouth 7 of the supply line 6 extend outward can.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Nozzles (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Radiation-Therapy Devices (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Particle Accelerators (AREA)

Abstract

The invention relates to a device for accelerating abrasives, comprising a centrifugal wheel (8) that is driven to rotate about an axis of rotation. Said centrifugal wheel further comprises blades (2) that are disposed in a substantially radial orientation relative to the axis of rotation, and a lateral disk (4) on which the blades (2) are retained with a lateral edge. A feed line (6) for the abrasive has an opening (7) that is contiguous with the free edges of the blades (2) of the centrifugal wheel (8) outside the axis of rotation of said centrifugal wheel (8). The inventive device is further characterized in that the blades (2), on the side facing the feed line (6), have recesses (3) that are opposite the opening (7) of the feed line (6).

Description

Die Erfindung betrifft eine Vorrichtung zum Beschleunigen von Strahlmittel mit einem Schleuderrad, das um eine Drehachse rotierend antreibbar ist sowie im wesentlichen radial zur Drehachse ausgerichtete Schaufeln und eine Seitenscheibe aufweist, an der die Schaufeln mit einem Seitenrand gehalten sind, sowie mit mindestens einer Zuleitung für das Strahlmittel, deren Mündung außerhalb von der Drehachse des Schleuderrades an die freien Seitenränder der Schaufeln des Schleuderrades angrenzt.The invention relates to a device for accelerating of blasting agent with a blast wheel, the order a rotation axis is driven in rotation and substantially radially aligned with the axis of rotation blades and a side window on which the blades are held with a margin, as well as with at least a supply line for the abrasive, the mouth outside of the axis of rotation of the blast wheel to the free side edges of the blades of the spinner borders.

Bei einer derartigen aus der US-PS 2 363 437 bekannten Vorrichtung wird das Strahlmittel seitlich in den Wirkbereich der Schaufeln des Schleuderrades eingespeist. Die Schaufeln sind dabei mit einem Seitenrand an der Seitenscheibe, auf welche die Antriebselemente des Schleuderrades einwirken, des Schleuderrades gehalten, während der andere oder freie Seitenrand der Schaufeln des sich drehenden Schleuderrades an der Mündung der Zuleitung für das Strahlmittel vorbeistreicht. Diese Art der Einspeisung des Strahlmittels in das Schleuderrad kann zu Beschädigungen, insbesondere von dessen Schaufeln führen, wenn das eingespeiste Strahlmittel größere Verunreinigungen wie Schraubenmuttern oder -bolzen enthält, da beim Vorbeistreichen der Schaufeln an der Öffnung der Zuleitung eine "Quetschkante" entsteht, die kleiner bzw. schmaler als diese Verunreinigungen ist. Weiter wird beim Vorbeistreichen der Schaufeln an dieser Öffnung der Zufluß des Strahlmittels kurzzeitig unterbrochen.In such known from US-PS 2,363,437 Device, the blasting agent is laterally in the effective range fed to the blades of the blast wheel. The blades are with a side edge on the Side window, on which the drive elements of the Impact wheel acting, held the blast wheel, while the other or free side edge of the blades of the rotating impeller at the mouth of Supply line for the blasting medium passes. These Type of feeding of blasting medium into the blast wheel can cause damage, especially of its Shovels lead when the fed blasting agent larger contaminants such as nuts or Bolt contains, as when passing the blades at the opening of the supply line a "pinch edge" arises, the smaller or narrower than these impurities is. Further, when passing the blades at this opening the inflow of the blasting agent briefly interrupted.

Bei einer anderen aus der DD 265 847 A1 bekannten Vorrichtung wird das Strahlmittel dem Schleuderrad in den Bereich der inneren an die Nabe des Schleuderrades angrenzenden Enden der Schaufeln eingespeist. Zu diesem Zweck ragt die als abgeschrägte Rinne ausgebildete Öffnung der Zuleitung in den Wirkbereich der Schaufeln hinein, die mit einem entsprechend geformten inneren Ende an dieser Öffnung vorbeistreichen. Diese Art der Einspeisung des Strahlmittels in das Innere des Schleuderrades weist die gleichen Nachteile auf, die bei der aus der US-PS 2 363 437 bekannten Vorrichtung auftreten, da beim Vorbeistreichen der Schaufeln an der rinnenförmigen Öffnung der Zuleitung ebenfalls eine "Quetschkante" entsteht.In another known from DD 265 847 A1 device the blasting agent is the blast wheel in the area of the inner to the hub of the blast wheel fed to adjacent ends of the blades. To this Purpose towers the trained as a chamfered channel Opening the supply line in the effective range of the blades which pass past this opening with a correspondingly shaped inner end. This type of feeding the blasting medium into the interior of the blast wheel has the same drawbacks that occur in the device known from US-PS 2 363 437, as when passing the blades on the trough-shaped opening of the supply line as well a "pinch edge" arises.

Bei einer weiteren in der DE 198 38 733 beschriebenen Vorrichtung wird das Strahlmittel nicht unmittelbar in den Wirbereich der Schaufeln des Schleuderrades, sondern außerhalb der Drehachse des Schleuderrades in ein in dessen Zentraum angeordnetes Hilfsschleuderrad eingespeist. Aus dem Hilfsschleuderrad tritt das Strahlmittel über eine Zuteilöffnung in einer Zuteilhülse, an welche die inneren Enden der Schaufeln des Schleuderrades angrenzen, in radialer Richtung in den Wirkbereich der Schaufeln des Schleuderrades ein. Die an die Zuteilhülse angrenzenden Schaufelenden streichen über die Zuteilöffnung hinweg, so dass zwischen den Schaufelenden und den Rändern der Zuteilöffnung ebenfalls eine "Quetschkante" entsteht.In another device described in DE 198 38 733 the blasting agent not directly into the sphere of action of the blades of the blast wheel, but outside of the Rotary axis of the blast wheel fed into a arranged in the center of the auxiliary ejector. From the Hilfsschleuderrad the blasting agent passes through a Zuteilöffnung in one Dispensing sleeve, which adjoin the inner ends of the blades of the impeller, in Radial direction in the effective range of the blades of the spinner. The to the allocation sleeve adjoining blade ends pass over the metering opening, so that between the blade ends and the edges of the metering opening also a "pinch edge" arises.

Aufgabe der Erfindung ist es nun, eine Vorrichtung zum Beschleunigen von Strahlmittel zu schaffen, in die Strahlmittel mit Fremdkörpern, die größer als das Strahlmittel sind, eingespeist werden kann, ohne Bruchschäden am Schleuderrad zu verursachen.The object of the invention is now to provide a device for accelerating blasting agent in the blasting media with foreign bodies that are larger than the blasting medium, fed can be without causing breakage damage to the blast wheel.

Diese Aufgabe wird, ausgehend von einer Vorrichtung der eingangs beschriebenen Art, erfindungsgemäß dadurch gelöst, dass die Schaufeln auf ihrer der Zuleitung zugewandten Seite Einschnitte aufweisen, die der Mündung der Zuleitung gegenüberliegen.This object is, starting from a device of the type described above, according to the invention achieved in that the blades on their side facing the supply line Have incisions facing the mouth of the supply line.

Mit dem Einschnitt oder der Aussparung nach der Erfindung in den Schaufeln des Schleuderrades gegenüber der Zuleitung für das Strahlmittel wird ein Bereich erhalten, der beim Vorbeistreichen der Schaufeln an der Öffnung bzw. Mündung der Zuleitung den axialen und seitlichen Zufluß des Strahlmittels nicht unterbricht und zugleich größeren Fremdkörpern den ungehinderten Eintritt in das Schleuderrad ermöglicht.With the incision or the recess according to the invention in the blades of the blast wheel opposite the supply line for the blasting agent becomes an area obtained when passing the blades the opening or mouth of the supply line the axial and lateral inflow of the blasting agent does not interrupt and at the same time larger foreign bodies the unhindered Entry into the blast wheel allows.

Bei einer anderen zweckmäßigen Weiterbildung der Erfindung sind auf der zur Antriebsseite gerichteten Außenfläche der Seitenscheibe des Schleuderrades Rippen vorgesehen. Durch diese Rippen wird in den Raum zwischen dem Schleuderrad und dem dasselbe umgebenden Gehäuse eindringendes Strahlmittel radial nach außen geschleust, so daß auf eine Abdichtung zwischen Gehäuse und Antriebswelle des Schleuderrades verzichtet werden kann. In another expedient development of the invention are on the outer side facing the drive side the side window of the centrifugal wheel ribs intended. Through these ribs is in the space between the blast wheel and the housing surrounding it penetrating blasting agent radially outward, so that a seal between the housing and drive shaft the impeller can be dispensed with.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Further advantageous embodiments of the invention are given in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird noch an Hand der Zeichnungen beschrieben. Es stellen dar:

Fig. 1:
eine schematische Schnittansicht durch ein Schleuderrad, das in einem Gehäuse angeordnet ist.
Fig. 2:
eine schematische Schnittansicht durch das Schleuderrad und das Gehäuse längs der Linie I-I der Fig. 1.
An embodiment of the invention will be described with reference to the drawings. They show:
Fig. 1:
a schematic sectional view through a blast wheel, which is arranged in a housing.
Fig. 2:
a schematic sectional view through the impeller and the housing along the line II of FIG. 1st

Das in den Figuren 1 und 2 dargestellte Schleuderrad 8 ist von einem Gehäuse 10 umgeben, in das eine Zuleitung 6 mündet, mit der das Strahlmittel wie Quarzsand oder Stahlschrot dem Schleuderrad 8 zugeführt wird. Gegenüber der Einspeiseseite für das Strahlmittel ragt die Antriebswelle 5 des Schleuderrades 8 aus dem Gehäuse 10 heraus. The blast wheel shown in Figures 1 and 2 8 is surrounded by a housing 10, in which a supply line 6 opens, with the blasting agent such as quartz sand or steel shot is fed to the blast wheel 8. Opposite the feed side for the blasting agent protrudes the drive shaft 5 of the blast wheel 8 from the housing 10 out.

Das Schleuderrad 8 verfügt über eine Seitenscheibe 4, die an einer Antriebswelle 5 befestigt ist und auf der der Antriebswelle 5 gegenüberliegenden Fläche Schaufeln 2 trägt, deren innere Enden an einen hülsenförmigen Rotationskörper 1 angrenzen. Der die Nabe des Schleuderrades 8 bildende Rotationskörper 1 ist im Zentrum des Schleuderrades 8 vorgesehen und drehfest mit der Antriebswelle 5 bzw. der Seitenscheibe 4 verbunden. In das Gehäuse 10 tritt radial seitlich vom Rotationskörper 1 die Zuleitung 6 ein, deren Mündung 7 an die freien Seitenränder der Schaufeln 2 des Schleuderrades 8 angrenzt. In den Schaufeln 2 sind Einschnitte 3 ausgebildet, die der Mündung 7 gegenüberliegen.The blast wheel 8 has a side window 4, which is fixed to a drive shaft 5 and on the blades of the drive shaft 5 opposite surface 2 carries, the inner ends of a sleeve-shaped Adjacent rotational body 1. The hub of the blower wheel 8 forming rotating body 1 is in the center of Impeller 8 provided and non-rotatably with the drive shaft 5 and the side window 4 connected. In the housing 10 occurs radially laterally from the rotary body 1, the supply line 6, the mouth 7 to the free Side edges of the blades 2 of the blast wheel 8 adjacent. In the blades 2 incisions 3 are formed, the opposite of the mouth 7.

Auf der den Schaufeln 2 gegenüberliegenden Fläche der Seitenscheibe 4 sind weiter Rippen 9 ausgebildet.On the opposite surfaces of the blades 2 Side window 4 ribs 9 are further formed.

Neben der beschriebenen Ausführungsform sind weitere dem Fachmann geläufige Abwandlungen möglich. Die Einschnitte 3 können auch gekrümmt sein, wobei die Krümmung mit einer Ausbuchtung versehen sein kann, die sich in radialer Richtung vom Zentrum des Schleuderrades 8 über die Mündung 7 der Zuleitung 6 hinweg nach außen erstrecken kann.In addition to the described embodiment are more the skilled artisan modifications possible. The cuts 3 may also be curved, with the curvature with a bulge may be provided, extending in radial Direction from the center of the blast wheel 8 via the mouth 7 of the supply line 6 extend outward can.

Claims (8)

  1. Apparatus for accelerating abrasive material with
    a) an impeller which can be rotatably driven about an axis of rotation and has blades extending substantially radially to the axis of rotation and a lateral disc on which the blades are held by a side edge,
    as well as
    b) at least one feed line for the abrasive material, the outlet opening of which line borders on the free side edges of the blades of the impeller outside the axis of rotation of the impeller,
    characterized in that the blades (2) have cut-outs (3) on the side thereof facing the feed line (6), the cut-outs lying opposite the outlet opening (7) of the feed line (6).
  2. Apparatus according to Claim 1, characterized in that the blades (2) are divided at least in two in the radial direction.
  3. Apparatus according to Claim 2, characterized in that the individual sections of each blade (2) are at a spacing from one another which forms the cutout (3).
  4. Apparatus according to one of the preceding claims, characterized in that the blades (2) of the impeller (8) are of varying lengths.
  5. Apparatus according to one of the preceding claims, characterized in that the inner ends of the blades (2) are in contact against the hub (1) of the impeller in a gap-free manner.
  6. Apparatus according to one of the preceding claims, characterized in that the longitudinal direction of the blades (2) deviates from a radial orientation relative to the impeller (8).
  7. Apparatus according to one of the preceding claims, characterized in that an annular disc is secured to the free side edges of the blades (2), the central bore of the annular disc having a radius greater than the radial distance between the outer rim of the outlet opening (7) of the feed line (6) and the axis of rotation of the impeller (8).
  8. Apparatus according to one of the preceding claims, characterized in that ribs (9) are provided on the outer surface of the lateral disc (4) of the impeller (8) that is directed toward the drive side of the impeller (8).
EP01967264A 2000-08-15 2001-08-13 Device for accelerating abrasives Expired - Lifetime EP1318890B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20014303U 2000-08-15
DE20014303 2000-08-15
PCT/EP2001/009355 WO2002014017A1 (en) 2000-08-15 2001-08-13 Device for accelerating abrasives

Publications (2)

Publication Number Publication Date
EP1318890A1 EP1318890A1 (en) 2003-06-18
EP1318890B1 true EP1318890B1 (en) 2005-05-04

Family

ID=7945358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01967264A Expired - Lifetime EP1318890B1 (en) 2000-08-15 2001-08-13 Device for accelerating abrasives

Country Status (5)

Country Link
US (1) US7537513B2 (en)
EP (1) EP1318890B1 (en)
AT (1) ATE294671T1 (en)
DE (1) DE50106129D1 (en)
WO (1) WO2002014017A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363437A (en) 1943-06-14 1944-11-21 Rolland E Peterson Centrifugal blasting machine
DE921615C (en) * 1951-09-16 1954-12-23 Badische Maschinenfabrik A G Centrifugal wheel blade for centrifugal wheel cleaning machines for cleaning cast or rolling mill products u. ae., for matting glass u. like
GB830042A (en) * 1957-01-16 1960-03-09 John Arthur Frank Kinsman Improvements in or relating to centrifugal machines
US4249350A (en) * 1979-01-15 1981-02-10 Goff James R Abrasive throwing wheel and improved blade assembly
GB8332348D0 (en) * 1983-12-03 1984-01-11 Massey A Machine part
JPS6176272A (en) * 1985-09-18 1986-04-18 Nitsuchiyuu:Kk Shotblast projector
US4759156A (en) * 1986-08-19 1988-07-26 Acd, Inc. Blast media transport and throwing wheel
DD265847A1 (en) * 1987-11-06 1989-03-15 Schiffbau Veb K SCHLEUDERRADSTRAHLVORRICHTUNG
DE19838733C1 (en) * 1998-08-26 1999-11-25 Jost Wadephul Thrower wheel for sprayer

Also Published As

Publication number Publication date
US7537513B2 (en) 2009-05-26
EP1318890A1 (en) 2003-06-18
DE50106129D1 (en) 2005-06-09
ATE294671T1 (en) 2005-05-15
US20020155796A1 (en) 2002-10-24
WO2002014017A1 (en) 2002-02-21

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