EP0001969A1 - Roue centrifuge pour la projection d'abrasif - Google Patents

Roue centrifuge pour la projection d'abrasif Download PDF

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Publication number
EP0001969A1
EP0001969A1 EP78100959A EP78100959A EP0001969A1 EP 0001969 A1 EP0001969 A1 EP 0001969A1 EP 78100959 A EP78100959 A EP 78100959A EP 78100959 A EP78100959 A EP 78100959A EP 0001969 A1 EP0001969 A1 EP 0001969A1
Authority
EP
European Patent Office
Prior art keywords
centrifugal
grooves
wedge
side strips
wheel
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.)
Granted
Application number
EP78100959A
Other languages
German (de)
English (en)
Other versions
EP0001969B1 (fr
Inventor
Sergej Dipl.-Ing. Eth Toedtli
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.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
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 Georg Fischer AG filed Critical Georg Fischer AG
Publication of EP0001969A1 publication Critical patent/EP0001969A1/fr
Application granted granted Critical
Publication of EP0001969B1 publication Critical patent/EP0001969B1/fr
Expired 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
    • B24C5/062—Rotor blades or vanes; Locking means therefor

Definitions

  • the invention relates to a centrifugal wheel for centrifuging centrifugal material with at least one wheel disc, a plurality of uniformly distributed centrifugal blades which can be pushed in and which have side strips on their long sides and with stops which limit the movement of the centrifugal vanes in the radial direction to the outside.
  • Centrifugal wheels of the type mentioned at the outset, in which the blades are inserted from the outside, are known, these having rotatable stops (for example DT-PS 21 15 354) or plug-in stops (CH-PS 352 923) and the side strips of the centrifugal blade and the grooves of the wheel disc are each parallel.
  • rotatable stops for example DT-PS 21 15 354
  • plug-in stops CH-PS 352 923
  • centrifugal wheel which damages the centrifugal wheel, but especially its storage.
  • the space in the wheel center for such work when removing the centrifugal blades is very limited.
  • centrifugal blades, the throwing surface of which is made of hard metal must not be dismantled with hammer blows, as these will be severely damaged and further use, e.g. in the case of their reversed installation with the side not yet subject to wear is impossible.
  • the CH-PS 352 923 shows recesses on the sidebars of the centrifugal blades, which should improve the expansion, but it has been shown in practice that these recesses or pockets are also full of abrasive during operation and the abrasive grains are pressed together in such a way that a significant improvement in disassembly was not achieved.
  • centrifugal wheels of the type mentioned at the outset are known, the centrifugal blades of which are pushed into the grooves from the center of the centrifugal wheel and have fixed stops on the blade or the wheel disc (DT-PS 21 12 497, DT-OS 26 34 198). Due to the parallel grooves and side strips here, the same difficulties already described occur when dismantling from the outside inwards.
  • the cut-outs of each side bar described in DT-OS 26 34 198 do not make disassembly easier for the reasons given for CH-PS 352 923. If such cutouts are chosen to be very large in relation to the groove length, the contact surface of the blade is reduced to such an extent that, given the considerable circumferential forces, the surface pressures are too high and damage to the contact surfaces occurs.
  • the object of the present invention is to provide a centrifugal wheel of the type mentioned at the outset, the mounting of the centrifugal vanes in the wheel disk or wheels being designed in such a way that easy dismantling of the centrifugal vanes is ensured without great effort and also the use of movable and fixed stops Securing the centrifugal scoop to the outside is possible.
  • the wedge-shaped design according to the invention of the grooves and / or the side strips enables simple removal, even by blasting media, of firmly jammed centrifugal vanes without special tools and without damaging the grooves or the centrifugal vanes.
  • FIG. 1 and 2 show partial sections of a two-disc centrifugal wheel which can be operated in both directions of rotation.
  • This centrifugal wheel essentially consists of an inner wheel disk 1, an outer wheel disk 2, and a plurality of centrifugal blades 3, which are uniformly distributed on the circumference, only one centrifugal blade being shown in the figures.
  • the inner wheel disc 1 is fastened by means of screws 12 to a flange 4, a shaft 11, which rotates about an axis of rotation 5 driven by a motor.
  • the front wheel disc 2 is firmly connected to the rear wheel disc 2 by means of a plurality of evenly distributed spacer bolts 6.
  • the throwing vanes 9, which have throwing surfaces 9, are provided with side strips 7, which are arranged in mutually opposing, radially running grooves 8 in the inside engage the surfaces of the wheel disks 1 and 2.
  • the side strips 7 extend to the outer diameter of the wheel disks 1 and 2, the centrifugal blades 3 with a part 10 projecting beyond the wheel disks 1 and 2.
  • the throwing surfaces 9 are each provided with an edge 13 which serves to guide the blasting medium.
  • the inner end of the centrifugal blades 3 form the outer boundary of a central free space 14, in which an impeller 15 and a regulator basket (not shown) are arranged.
  • the impeller 15 is fixedly connected to the shaft 11 by means of a centrally arranged screw 16 and has a flange 17, the peripheral surface 18 of which forms the stop for the centrifugal blades 3 inwards. Since the diameter of the free space 14 is greater than the length of the side strips 7, the centrifugal blades 3 can be inserted into the grooves 8 from the inside when the regulator basket and impeller 15 are removed.
  • the centrifugal scoop 3 has a material projection 19 on the outer surface of a side bar 7.
  • This material projection 19, which has a rectangular cross section, extends from the inner blade end over part of the length of the side bar 7.
  • the end of the material projection 19 facing the blade discharge edge is formed by two inclined surfaces 20 running towards one another and a stop surface 21 running perpendicular to the direction of insertion.
  • 8 recesses 22 are arranged at the inner end of the grooves, the outer end of which is a circular arc and is a contact surface 23.
  • This contact surface 23 forms, together with the stop surface 21 of the material projection 19, a fixed stop 24 which limits the insertion path and holds the centrifugal vane 3 outwards in the radial direction.
  • the fixed stops 24 only on the shaft-side wheel disc 1 causes the rotation
  • the centrifugal forces generated by the centrifugal blades 3 are transmitted directly from the wheel disc 1 to the shaft 11 and its bearing.
  • the fixed stops 24 can also be arranged on both side strips 7 and two wheel disks 1 and 2, wherein other embodiments, such as pins in the grooves of the wheel disks and recesses in the side bar of the centrifugal blade, are also possible.
  • the cross section of the side strips 7 and of the grooves 8 is rectangular.
  • the side rails 7 are wedge-shaped in their longitudinal direction symmetrical to the longitudinal axis 25 of the centrifugal blade 3 in two mutually perpendicular planes, the larger cross section of the side rails 7 being at the inner end of the centrifugal blades 3.
  • the grooves 8 are also wedge-shaped in the same direction, as a result of which an approximately parallel gap 26 is formed between the grooves 8 and the side strips 7 when the centrifugal vane 3 lies against the stop 24.
  • the gap 26 is required for reasons of the manufacturing tolerance of the cast centrifugal blades 3, it being ensured by the centrifugal blades 3 resting against the stop 24 that the centrifugal forces are absorbed by this stop 24 and not by the wedge-shaped grooves 8.
  • the gap 26 fills with abrasive particles which jam therein.
  • these jammed abrasive particles are released immediately when the centrifugal blades are dismantled, since the gap 26 is immediately enlarged with a small displacement path of the centrifugal blade 3 inwards.
  • FIG. 4 shows an embodiment variant in which the grooves 8a are designed in parallel and the side strips 7 of the centrifugal vane 3, as in FIG. 2, have a wedge-shaped reduction from the inside to the outside. This creates a gap 26a which increases outwards.
  • the side strips 7a are formed in parallel, and the groove 8 corresponds to the wedge-shaped groove, according to FIG. 2, the gap 26b enlarging inwards in a wedge shape.
  • centrifugal wheel design is shown in partial sections, in which the centrifugal vanes 33 are inserted from the outside between wheel disks 31 and 32 and are held outwards by movable stops 44.
  • a sleeve 45 is rotatably mounted, at the ends of which locking cams 46 are arranged, which are provided with a flattened portion 47.
  • Each of the centrifugal blades 33 is provided with side strips 37 which are inserted into mutually opposite grooves 38 of the wheel disks 31, 32.
  • On a throwing surface 39 of the centrifugal vane 33 two bumps 49 are arranged directly adjacent to the side strips 37, which together with the locking cams 46 form the stop 44.
  • the side strips 37 and the grooves 38 are wedge-shaped symmetrically to the longitudinal axis 25 of the centrifugal blade 33, the cross section of the side strips 37 and the grooves 38 being reduced from the outside inwards.
  • centrifugal blades 33 When the centrifugal blades 33 are assembled, they are pushed into the wedge-shaped grooves 38 from the outside, with the flattening 47 of the locking cams 46 parallel to the groove 38, until they abut the peripheral surface 18 of the flange 17 with their inner end. The sleeve 45 is then rotated until the locking cams 46 abut the cusps 49 of the centrifugal vane 33, which ensures that they are held outwards. At the same time, the centrifugal vane 33 is thereby pressed against the opposite surface of the groove 38, as a result of which a gap 26 is formed on the side of the hump 49 between the groove 38 and the side bar 37, which gap, as already described, fills with blasting agent. The immediate enlargement of the gap when pulling out the centrifugal blades also makes the dismantling of the centrifugal blades much easier here.
  • the groove 38a is formed with parallel surfaces and the side bar 37a is asymmetrical with respect to the longitudinal axis 25, the side of the side bar facing the stop 44 shrinking inward in a wedge shape and the opposite side being made parallel to the longitudinal axis 25. This creates a wedge-shaped gap 26c on one side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Crushing And Pulverization Processes (AREA)
EP78100959A 1977-11-17 1978-09-22 Roue centrifuge pour la projection d'abrasif Expired EP0001969B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14039/77 1977-11-17
CH1403977A CH623769A5 (fr) 1977-11-17 1977-11-17

Publications (2)

Publication Number Publication Date
EP0001969A1 true EP0001969A1 (fr) 1979-05-30
EP0001969B1 EP0001969B1 (fr) 1981-02-11

Family

ID=4397437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100959A Expired EP0001969B1 (fr) 1977-11-17 1978-09-22 Roue centrifuge pour la projection d'abrasif

Country Status (8)

Country Link
US (1) US4207712A (fr)
EP (1) EP0001969B1 (fr)
JP (1) JPS5478595A (fr)
CH (1) CH623769A5 (fr)
DE (2) DE2860478D1 (fr)
IN (1) IN149548B (fr)
IT (1) IT1160931B (fr)
ZA (1) ZA786045B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107204A1 (fr) * 2010-03-04 2011-09-09 Rösler Holding GmbH & Co. KG Roue de projection
EP3197638A4 (fr) * 2014-09-25 2018-08-29 Wheelabrator Group Limited Pale pour machine à roue de projection centrifuge et procédé d'entretien d'une machine à roue de projection centrifuge

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333278A (en) * 1979-09-24 1982-06-08 Wheelabrator-Frye Inc. Bladed centrifugal blasting wheel
US4480413A (en) * 1979-09-24 1984-11-06 Wheelabrator-Frye Inc. Bladed centrifugal blasting wheel
US4751798A (en) * 1986-06-04 1988-06-21 Mcdade Bernard F Shot blasting apparatus
US4941296A (en) * 1987-05-12 1990-07-17 Pangborn Corporation Surface cleaner
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
US6126516A (en) * 1999-05-10 2000-10-03 United States Filter Corporation Centrifugal blasting apparatus
US6764390B2 (en) 2001-11-28 2004-07-20 International Surface Preparation Group, Inc. Centrifugal throwing vane
US6949014B2 (en) * 2003-11-17 2005-09-27 Wheelabrator Group, Inc. Control cage for abrasive blast wheel
US6981910B1 (en) * 2004-07-30 2006-01-03 Goff James R Throwing wheel assembly
US8550881B2 (en) * 2009-11-16 2013-10-08 Pangborn Corporation Vane, mounting assembly and throwing wheel apparatus having a locking member tapered in two planes
CN110625537A (zh) * 2019-09-06 2019-12-31 昆山亚比斯环保包装材料有限公司 一种喷击机台的叶轮设备及喷击机台
TWI758637B (zh) * 2019-09-11 2022-03-21 亞比斯創新科技股份有限公司 葉輪結構及投射設備
TWI709460B (zh) * 2019-09-12 2020-11-11 亞比斯包材工場股份有限公司 噴擊機台及其葉輪設備

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE834340C (de) * 1945-04-25 1952-03-17 Fischer Ag Georg Schleuderrad zum Schleudern von Schleudergut
CH352923A (de) * 1956-05-07 1961-03-15 Wheelabrator Corp Zentrifugalschleuderrad
GB1003441A (en) * 1963-04-18 1965-09-02 Spencer & Halstead Ltd Blades for the impellers of blast-cleaning machines
CH556717A (de) * 1972-04-05 1974-12-13 Wheelabrator Frye Inc Schleuderrad.
DE2356226A1 (de) * 1973-11-10 1975-05-15 Berger Maschf Gmbh Befestigung von wurfschaufeln oder schlaegern an rotoren von strahl- bzw. zerkleinerungsvorrichtungen
DE2112497B2 (de) * 1970-04-13 1975-06-19 The Wheelabrator Corp., Mishawaka, Ind. (V.St.A.) Schleuderrad zum Schleudern von Schleudergut

Family Cites Families (4)

* 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
DE2437493A1 (de) * 1974-08-03 1976-02-12 Berger Maschf Gmbh Abdeckhaube mit hochschwenkbarem deckel fuer schleuderraeder von strahlreinigungsmaschinen
US3977515A (en) * 1974-12-16 1976-08-31 Bird Machine Company, Inc. Hard-surfaced screw conveyor for centrifuges
GB1500092A (en) * 1975-10-24 1978-02-08 Tilghman Wheelabrator Ltd Blast impellor wheels

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE834340C (de) * 1945-04-25 1952-03-17 Fischer Ag Georg Schleuderrad zum Schleudern von Schleudergut
CH352923A (de) * 1956-05-07 1961-03-15 Wheelabrator Corp Zentrifugalschleuderrad
GB1003441A (en) * 1963-04-18 1965-09-02 Spencer & Halstead Ltd Blades for the impellers of blast-cleaning machines
DE2112497B2 (de) * 1970-04-13 1975-06-19 The Wheelabrator Corp., Mishawaka, Ind. (V.St.A.) Schleuderrad zum Schleudern von Schleudergut
CH556717A (de) * 1972-04-05 1974-12-13 Wheelabrator Frye Inc Schleuderrad.
DE2356226A1 (de) * 1973-11-10 1975-05-15 Berger Maschf Gmbh Befestigung von wurfschaufeln oder schlaegern an rotoren von strahl- bzw. zerkleinerungsvorrichtungen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107204A1 (fr) * 2010-03-04 2011-09-09 Rösler Holding GmbH & Co. KG Roue de projection
EP3197638A4 (fr) * 2014-09-25 2018-08-29 Wheelabrator Group Limited Pale pour machine à roue de projection centrifuge et procédé d'entretien d'une machine à roue de projection centrifuge
US10384327B2 (en) 2014-09-25 2019-08-20 Wheelabrator Group Limited Blade for centrifugal blast wheel machine and method of maintaining a centrifugal blast wheel machine

Also Published As

Publication number Publication date
US4207712A (en) 1980-06-17
IT1160931B (it) 1987-03-11
JPS5551709B2 (fr) 1980-12-25
IN149548B (fr) 1982-01-16
CH623769A5 (fr) 1981-06-30
IT7869619A0 (it) 1978-11-16
DE7831676U1 (de) 1979-02-08
ZA786045B (en) 1979-10-31
EP0001969B1 (fr) 1981-02-11
JPS5478595A (en) 1979-06-22
DE2860478D1 (en) 1981-03-26

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