EP0011074A1 - Roue de projection pour machines de sablage - Google Patents

Roue de projection pour machines de sablage Download PDF

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Publication number
EP0011074A1
EP0011074A1 EP79100079A EP79100079A EP0011074A1 EP 0011074 A1 EP0011074 A1 EP 0011074A1 EP 79100079 A EP79100079 A EP 79100079A EP 79100079 A EP79100079 A EP 79100079A EP 0011074 A1 EP0011074 A1 EP 0011074A1
Authority
EP
European Patent Office
Prior art keywords
blades
wheel according
centrifugal wheel
annular
disks
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.)
Withdrawn
Application number
EP79100079A
Other languages
German (de)
English (en)
Inventor
Joachim Cardinal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wheelabrator Berger Maschinenfabriken GmbH and Co KG
Original Assignee
Wheelabrator Berger Maschinenfabriken GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wheelabrator Berger Maschinenfabriken GmbH and Co KG filed Critical Wheelabrator Berger Maschinenfabriken GmbH and Co KG
Publication of EP0011074A1 publication Critical patent/EP0011074A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention relates to a centrifugal wheel for blasting devices, consisting of two annular disks which are kept at a distance and connected to one another by means of a plurality of spacers, and radially inserted between the annular disks and releasably connected to these blades, and hub disks which can be placed on the outside of the annular disk.
  • the annular disks are kept at a distance by cylindrical bolts which are welded or screwed to them and have radial grooves in the mutually facing inner sides, into which the blades are inserted and through special clamping elements are pressed against the groove edges.
  • the clamping members are mounted in special recesses provided in the annular disks, act under the action of springs and rest on projections which are provided on the surface of the blade.
  • the clamping devices allow worn blades to be removed from the impeller and replaced with new ones; they are arranged on the back of the blade in order to protect them to some extent against the abrasion caused by flying abrasive residues.
  • the invention has for its object to improve these centrifugal wheels sc that not only significantly reduces the manufacturing costs, but also creates the possibility of using the same parts of the centrifugal wheels, in particular the washers, for centrifugal wheels of different diameters and widths.
  • the blades alone form the spacers for the ring disks, the blades having flat side surfaces which rest on the likewise flat inner surfaces of the pair of ring disks.
  • the blades can be radially adjusted and fixed by means of interlocking projections and recesses arranged on the superimposed surfaces of the blade and the annular disc, and both annular discs are connected by screw bolts which are passed through a bore in the blades.
  • centrifugal wheels it is possible to use, instead of the cast blades provided with projections and machined surfaces, those made of bright drawn shaped steel which has been cut to the desired blade length without any further processing. Since the washers on both sides only have flat surfaces with holes, pairs of disks of the same dimensions can be used for different blade widths because the distance between the two disks forming a pair is determined exclusively by the width of the blades used in each case.
  • blade lengths in which the blades radially extend beyond the ring circumference of the pair of blades, so that the effective radiation area that can be acted upon by the blasting medium can be enlarged in diameter with the ring discs unchanged; it is also possible to use pairs of blades of different lengths in the same centrifugal wheel. Since their cross-section does not have to be changed over the entire length by machining or approaches, the blades can be arranged in the centrifugal wheel of the same design for clockwise or anti-clockwise rotation of the wheel or can also be given a profile such that both blade sides are suitable for blasting agent discharge that the assembled wheel can be used for right or left rotation.
  • the ring disks have no radial grooves, there is the possibility of chamfering the outer ring edges and thus weakening the impact of flying abrasive particles and thus reducing the wear of the ring disks as well.
  • the described special features of the design of the centrifugal wheels also allow them to be installed in existing jet devices of a different type instead of the centrifugal wheels used therein, since the diameter, width, blade length and number of blades can be varied within wide limits without the need for constructive modifications to the centrifugal wheel design.
  • the two ring disks 1 and 2 lie with their mutually facing inner surfaces 1a and 2a on the side surfaces 3a of the blades 3.
  • conical recesses 3b and 1b and 2b are embedded, which receive steel balls 4 lying opposite each other.
  • Through countersunk bores 1c are provided in the washer 1 for the screw bolts 5 and their heads 5a and in the washer 2 blind threaded bores 2c for the threaded end 5b of the bolts 5 are provided.
  • the cylindrical part of the bolts 5 between the head 5a and the threaded end 5b is passed with a slight clearance through a through hole 3a provided in the blades 3.
  • the blades 3 are axially fixed with respect to the disks 1 and 2.
  • the radial movement of the blades 3 which occurs in this adjustment is not impeded by the screw bolts 5, since these are guided through the bores 3a of the blades 3 with a correspondingly large clearance, as described.
  • the hub 6 with the hub disk 6a is placed and fastened by means of the screws 7 on the outer surface of the washer 1 so that the hub disk rests on the head surfaces of the heads 5a of the screw bolts 5 and the screw bolts are secured against rotation in this way.
  • the ring edges 1d and 2d of the ring disks 1 and 2 are chamfered and the outer ends of the blades 3 protrude radially outward in the exemplary embodiment over the outer ring circumference of the ring disks 1.
  • the blades can have different lengths and in such a way that pairs of blades 3 lying radially opposite one another are dimensioned longer than the respectively adjacent pairs 3 '.
  • FIG. 3 shows the different size of the effective radiation area when using pairs of blades of different lengths according to FIG. 2.
  • the absolute path of the blasting medium on the short blades 3 ' is as a continuous line B3' and the extension of this path on the longer blades 3 as a broken line B3 shown.
  • the corresponding enlargement of the dimensions of the effectively irradiated area can be seen from the impact points A3 and A3 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP79100079A 1978-01-12 1979-01-11 Roue de projection pour machines de sablage Withdrawn EP0011074A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2801148 1978-01-12
DE19782801148 DE2801148A1 (de) 1978-01-12 1978-01-12 Schleuderrad fuer strahlvorrichtungen

Publications (1)

Publication Number Publication Date
EP0011074A1 true EP0011074A1 (fr) 1980-05-28

Family

ID=6029336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100079A Withdrawn EP0011074A1 (fr) 1978-01-12 1979-01-11 Roue de projection pour machines de sablage

Country Status (2)

Country Link
EP (1) EP0011074A1 (fr)
DE (1) DE2801148A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT377216B (de) * 1982-04-26 1985-02-25 Ver Edelstahlwerke Ag Verfahren zur herstellung gehaerteter wurfschaufeln fuer fliehkraft-strahlvorrichtungen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1953566A (en) * 1934-01-24 1934-04-03 Wean Engineering Co Inc Blasting machine
FR836224A (fr) * 1937-04-06 1939-01-12 Procédé de préparation d'imprimés
GB510681A (en) * 1937-02-04 1939-08-04 Ame Ets A Sisson Lehmann Improvements in and relating to centrifugally spraying matter suspended in fluids
GB628965A (en) * 1946-06-13 1949-09-08 Benjamin Chew Tilghman Improvements in and relating to abrasive throwing machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1953566A (en) * 1934-01-24 1934-04-03 Wean Engineering Co Inc Blasting machine
GB510681A (en) * 1937-02-04 1939-08-04 Ame Ets A Sisson Lehmann Improvements in and relating to centrifugally spraying matter suspended in fluids
FR836224A (fr) * 1937-04-06 1939-01-12 Procédé de préparation d'imprimés
GB628965A (en) * 1946-06-13 1949-09-08 Benjamin Chew Tilghman Improvements in and relating to abrasive throwing machines

Also Published As

Publication number Publication date
DE2801148A1 (de) 1979-07-19

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19810316

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CARDINAL, JOACHIM