EP2507012A1 - Roue de projection - Google Patents

Roue de projection

Info

Publication number
EP2507012A1
EP2507012A1 EP11703603A EP11703603A EP2507012A1 EP 2507012 A1 EP2507012 A1 EP 2507012A1 EP 11703603 A EP11703603 A EP 11703603A EP 11703603 A EP11703603 A EP 11703603A EP 2507012 A1 EP2507012 A1 EP 2507012A1
Authority
EP
European Patent Office
Prior art keywords
wedge
throwing blade
carrier
carrier disc
throwing
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Withdrawn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
EP11703603A
Other languages
German (de)
English (en)
Inventor
Jörgen ASCH
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.)
Roesler Holding GmbH
Original Assignee
Roesler Holding GmbH
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 Roesler Holding GmbH filed Critical Roesler Holding GmbH
Publication of EP2507012A1 publication Critical patent/EP2507012A1/fr
Withdrawn legal-status Critical Current

Links

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

Definitions

  • the present invention relates to a blast wheel with a carrier disk, on the upper side of which at least one throwing blade is detachably fastened, by inserting a wedge provided on the throwing blade into a radially tapering guide of the carrier disk.
  • each throwing blade has a wedge with a trapezoidal cross-section which does not taper in the radial direction, wherein a further wedge with oblique surface is provided on the underside of the wedge, which wedges against the bottom of the dovetail groove provided in the carrier disk when the throwing blade is inserted into the carrier disk , Again, after prolonged operation, a release of the throwing blade from the support disk is difficult. It is the object of the present invention to provide a blast wheel of the type mentioned, in which the litter shovels mounted in a simple manner to the carrier disk and can be solved quickly and easily after prolonged use again from the carrier disk.
  • the wedge serves in a known manner for wedging the throwing blade in the leadership of the carrier.
  • the underside of the wedge does not contact the carrier disc, a clearance is created between the underside of the wedge and the carrier disc in which blasting media can accumulate but not solidify.
  • the throwing blade can have a planar bearing surface, with which the throwing blade rests on the carrier disk, wherein a part of the bearing surface absorbs wedge forces.
  • the throwing blade may, for example, have the cross-sectional shape of a double-T-carrier which is similar to the cross-sectional shape of a railroad rail, wherein the flat top side or underside of the double-T-profile forms the flat contact surface.
  • the wedge on the underside of the throwing blade on a be provided such flat support surface and jam the throwing blade between this support surface and other wedge surfaces.
  • the supporting surface is widened in the region of the wedge.
  • the throwing blades move radially outwardly due to the centrifugal forces that occur, which results in the desired wedging by itself. It may be advantageous in this case according to a further embodiment to provide for a defined investment of the throwing blades in the wedged position.
  • the wedge on its radially outer end face have a stop which ensures a defined contact with a mating surface of the carrier disk.
  • the stop is formed by a convex end face of the wedge, since such an end face on the one hand means no increased production costs and on the other hand, a point or line contact between the end face of the wedge and the carrier disk can be provided, so that in the area of the stop, even after prolonged operation no unwanted jamming takes place, which would hinder the release of the throwing blade.
  • the wedge has two lateral wedge surfaces which are adapted to the tapered guide, wherein the wedge has at its radially outer end face a stop which is provided for defined engagement with a mating surface of the carrier disk.
  • the throwing blade has a flat bearing surface, with which the throwing blade rests on the support disk, wherein the lateral wedge surfaces, the support surface and the stop are the only points of contact between the throwing blade and the carrier disk.
  • the contact points between the throwing blade and the carrier disc are chosen and optimized so that the insertion and release of the throwing blade is possible in a simple manner.
  • the wedge In order to reduce the detachment forces, which are necessary in particular after prolonged operation of the impeller for releasing the throwing blade from the support disk, the wedge according to another embodiment, two lateral wedge surfaces which are adapted to the tapered guide, wherein in each lateral wedge surface a return is provided, which divides the wedge surface into partial surfaces.
  • two radially spaced partial surfaces can be provided by the recess.
  • the carrier disc may be open in the region of the guide both in the direction of its upper side and in the direction of its underside.
  • this also advantages in the cleaning of the carrier disc are achieved when this example removed and provided with new throw blades.
  • a securing disk can be provided which is fastened radially to the carrier disk radially inside the throwing blades which are inserted into the carrier disk.
  • a cover disc can be releasably secured to the underside of the carrier disc.
  • the invention also relates to a throwing blade for a centrifugal wheel of the type described above, which comprises a flat bearing surface on which a wedge is provided with wedge surfaces extending at an acute angle to one another in the longitudinal direction of the wedge, wherein the bearing surface is at least partially wider than the wedge is to form an undercut between the support surface and the wedge surfaces.
  • Fig. 1 is a perspective view of a throwing blade
  • Fig. 2 is a perspective view of a carrier disc
  • Fig. 3 is a perspective view of a blast wheel.
  • Fig. 1 shows in perspective a view obliquely from below of a throwing blade 10, which has a double T-shape similar to a railway rail in cross section, wherein on the underside of the throwing blade 10, a wedge 12 is formed, which serves to the throwing blade 10 at a To fix in Fig. 2 carrier plate 14 shown.
  • the support disk 14 has several guide elements on its upper side, which can be seen in FIG. 2.
  • ments 16 which taper in each case in the radial direction and into which the wedge formed complementary to the guides can be inserted.
  • the carrier disk and the throwing blade are in this case designed such that the underside 18 of the wedge 12, which can be seen in FIG. 1, does not touch the carrier disk 14 and in particular the bottom of the guides 16.
  • the throwing blade 10 has an upper transverse web 20 and a lower transverse web 22, wherein the wedge 12 is integrally formed on the lower transverse web 22.
  • the lower transverse web 22 here forms a planar bearing surface 24, with part of this bearing surface 24 receiving wedging forces when the throwing blade 10 is wedged in the guide 16.
  • the support surface 24 is widened in the region of the wedge 12, i. the support surface 24 tapers to the front end of the wedge to the width of the upper crosspiece 20th
  • the wedge 12 has the shape of a trapezium in cross-section and tapers in a radial direction as viewed in plan, i. in the longitudinal direction of the throwing blade 10.
  • the trapezoidal cross-sectional shape of the wedge two lateral wedge surfaces are formed which extend at an acute angle to each other, wherein between each wedge surface and the support surface 24 - again in cross section - an undercut 26 is formed.
  • a rectangular recess 28, 28 ' is provided on each lateral wedge surface, dividing the wedge surface into two radially spaced partial surfaces A and B. Furthermore, the wedge 12 on its radially outer end face on a stop which is provided for a defined abutment on a counter surface of the support plate 14, wherein the stop in the illustrated embodiment by a kon- vex curved end face 30 of the wedge is formed. In other words, the wedge 12 is rounded at its front, ie radially outer end.
  • Fig. 1 further shows that the wedge 14 extends in the radial direction, i. extends in the longitudinal direction of the throwing blade 10 over approximately half the length of the throwing blade. At its radially inner end, the wedge has its greatest width and it tapers in the direction of its radially front end.
  • the illustrated in Fig. 2 carrier plate 14 has in the illustrated embodiment a total of six guides 16 which have a mating to the wedge 12 adapted cross section, which is trapezoidal and which tapers radially from the inside to the outside. At the radially outer end of the guides 16, a circular chamber is provided, whose wall serves as a counter surface for the end face 30 of the wedge 12.
  • Fig. 2 further illustrates that the support plate 14 is formed in the illustrated embodiment as an annular disc having an outer periphery and an inner periphery, so that for insertion of the throwing blade of the wedge 12 can be inserted with its front end in the region of the inner periphery in the guide 16.
  • the throwing blade 10 rests with its bearing surface 24 on the upper side of the carrier disk 14, which can be seen in FIG. 2, and the throwing blade can then be wedged outward on the carrier disk 14 by displacement in the radial direction.
  • a securing disc 32 shown in Fig. 3 are attached, which provides additional security of the throwing blades.
  • a cover plate 34 can be attached to the underside of the support plate 14, the penetration of Blasting agent in the region of the receptacles 16 prevents because the back of the support plate 14 is covered by the cover 34.
  • Impeller must be replaced, only in the embodiment shown in Fig. 3, the locking washer 32 must be removed.
  • the throwing blades can be released from their wedging by a slight blow on the radially outer end thereof.
  • no extremely high forces are required and the wedging easily dissolves, since the lateral wedge surfaces A and B, the support surface 24 and the front abutment surface 30 are the only points of contact between the throwing blade and the carrier disc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne une roue de projection qui présente un disque support sur la face supérieure duquel au moins une aube d'éjection est fixée de façon amovible, du fait qu'une clavette prévue sur l'aube d'éjection est insérée dans un guide, se rétrécissant dans le sens radial, du disque support qui ne touche pas la face inférieure de la clavette.
EP11703603A 2010-03-04 2011-02-07 Roue de projection Withdrawn EP2507012A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010010120 DE102010010120B4 (de) 2010-03-04 2010-03-04 Schleuderrad
PCT/EP2011/000559 WO2011107204A1 (fr) 2010-03-04 2011-02-07 Roue de projection

Publications (1)

Publication Number Publication Date
EP2507012A1 true EP2507012A1 (fr) 2012-10-10

Family

ID=43828425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11703603A Withdrawn EP2507012A1 (fr) 2010-03-04 2011-02-07 Roue de projection

Country Status (3)

Country Link
EP (1) EP2507012A1 (fr)
DE (1) DE102010010120B4 (fr)
WO (1) WO2011107204A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1020607A3 (nl) 2012-04-11 2014-01-07 Straaltechniek Internat N V S A Turbine.
DE102021129365A1 (de) 2021-11-11 2023-05-11 Fachhochschule Aachen, Körperschaft d. öffentl. Rechts Schaufel eines Schleuderrades, Schleuderrad und Verfahren zur Herstellung einer Schaufel
US20230278168A1 (en) * 2022-03-01 2023-09-07 Industrial Associates, LLC Blasting assemblies and vanes thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241266A (en) * 1963-07-10 1966-03-22 Pangborn Corp Abrasive particle throwing wheel assembly
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel
CH623769A5 (fr) * 1977-11-17 1981-06-30 Fischer Ag Georg
CA1242586A (fr) * 1983-06-30 1988-10-04 James H. Carpenter Aube evasee pour roue de decapage aux abrasifs
GB2167984B (en) * 1984-11-28 1988-01-27 Bct Ind Machinery Limited Blast-cleaning, shot-peening and peen-forming machines
US5209024A (en) * 1991-10-22 1993-05-11 Pangborn Corporation Inexpensive abrasive blast wheel
CA2126501C (fr) 1994-06-22 2000-01-18 Edward J. Stoltz Plaque a roues et a lames pour le decapage au jet de sable et methode de montage des lames a la roue
US7585207B2 (en) 2007-12-07 2009-09-08 Allan Barriger Throwing wheel assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011107204A1 *

Also Published As

Publication number Publication date
DE102010010120B4 (de) 2013-04-11
DE102010010120A1 (de) 2011-09-08
WO2011107204A1 (fr) 2011-09-09

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