EP0001969B1 - Schleuderrad zum Schleudern von Schleudergut - Google Patents

Schleuderrad zum Schleudern von Schleudergut Download PDF

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Publication number
EP0001969B1
EP0001969B1 EP78100959A EP78100959A EP0001969B1 EP 0001969 B1 EP0001969 B1 EP 0001969B1 EP 78100959 A EP78100959 A EP 78100959A EP 78100959 A EP78100959 A EP 78100959A EP 0001969 B1 EP0001969 B1 EP 0001969B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal
wheel
blades
blade
grooves
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
Application number
EP78100959A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0001969A1 (de
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/de
Application granted granted Critical
Publication of EP0001969B1 publication Critical patent/EP0001969B1/de
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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 evenly distributed centrifugal blades which can be inserted into radial grooves of the latter and which have side strips on their longitudinal sides and with fixed stops which limit the movement of the centrifugal blades outwards in the radial direction , wherein when the centrifugal blades abut against the stop there is a gap at least on one surface of the groove opposite the side bar.
  • Centrifugal wheels of the type mentioned at the outset in which the centrifugal blades are inserted from the center of the centrifugal wheel, are known (for example DE-B 21 12 497 or DE-A 26 34 198), the side strips of the centrifugal blades and the grooves of the wheel disc each being parallel are executed.
  • blasting media is stuck in the joints of the grooves, between the wheel disc and the centrifugal vane, which leads to wedging of the abrasive grains in these joints. This makes it very difficult to remove the centrifugal blades that are subject to heavy wear. Often an expansion with many hammer blows is necessary because the centrifugal blades have to be knocked out over the entire length of the grooves.
  • 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.
  • centrifugal wheels whose centrifugal vanes are pushed into the grooves from the outside and have movable or insertable stops, CH-A 352 923, DE-A 2 356 226 are known, in which case the wear of the movable stops also has an adverse effect on the expansion of the centrifugal show .
  • the CH-PS 352 923 shows recesses on the parallel sidebars of the centrifugal display, which should improve the expansion, but it has been shown in practice that these recesses or pockets are also full of blasting media during operation and the blasting medium grains are pressed together in this way, that a significant improvement in disassembly was not achieved.
  • GB-A 100 3441 shows a centrifugal scoop, which can also be inserted into the centrifugal wheel from the outside in and each has a stop that can be moved as a stop screw.
  • the side strips of the blades are formed on their upper and lower circumferential surfaces from the outside inwards in a wedge-shaped manner, which ensures that the blades are held inwards. Since the outer surfaces of the side strips, like the other blades, also run parallel, it is necessary to knock out the blade along the entire length of the side strips from the inside out. The problem of simply removing the centrifugal blade is therefore not solved here either.
  • the object of the present invention is to create 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 removal of the centrifugal vanes is ensured without great effort.
  • the wedge-shaped design according to the invention of the grooves and 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 distributed uniformly 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 fixedly connected to the rear wheel disc 1 by means of several evenly spaced spacer bolts 6.
  • the throwing surfaces 9 having centrifugal blades 3 are provided with side strips 7, which are arranged radially in opposing one another engage grooves 8 in the inner 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.
  • 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 blade 3 outwards in the radial direction.
  • the fixed stops 24 Due to the arrangement of the fixed stops 24 only on the shaft-side wheel disc 1, the centrifugal forces generated by the rotation on the centrifugal blades 3 are transmitted directly from the wheel disc 1 to the shaft 11 and its mounting.
  • the fixed stops 24 can also be arranged on both side rails 7 and both wheel disks 1 and 2, other embodiments, such as e.g. Pins in the grooves of the wheel disks and recesses in the side bar of the centrifugal blade are 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 symmetrically 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 necessary for reasons of the manufacturing tolerance of the cast centrifugal blades 3, whereby the centrifugal forces are taken up by this limit stop 24 and not by the wedge-shaped grooves 8 by contacting the centrifugal blades 3 on the stop 24.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Centrifugal Separators (AREA)
  • Crushing And Pulverization Processes (AREA)
EP78100959A 1977-11-17 1978-09-22 Schleuderrad zum Schleudern von Schleudergut Expired EP0001969B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=4397437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100959A Expired EP0001969B1 (de) 1977-11-17 1978-09-22 Schleuderrad zum Schleudern von Schleudergut

Country Status (8)

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

Families Citing this family (15)

* 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 (en) * 1994-06-22 2000-01-18 Edward J. Stoltz Blade and wheel plate for blast cleaning wheel and method of connecting a blade to the wheel plate
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
DE102010010120B4 (de) * 2010-03-04 2013-04-11 Rösler Holding GmbH & Co. KG Schleuderrad
PT3197638T (pt) 2014-09-25 2022-03-16 Wheelabrator Group Ltd Pá para máquina com roda de grenalhagem centrífuga e método de manutenção de uma máquina com roda de grenalhagem centrífuga
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

Family Cites Families (10)

* 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
US3241266A (en) * 1963-07-10 1966-03-22 Pangborn Corp Abrasive particle throwing wheel assembly
US3683556A (en) * 1970-04-13 1972-08-15 Raymond M Leliaert Centrifugal blasting wheel
US3785105A (en) * 1972-04-05 1974-01-15 Wheelabrator Frye Inc Centrifugal blasting wheel
DE2356226C3 (de) * 1973-11-10 1984-05-03 Berger Maschinenfabriken Gmbh & Co, 5070 Bergisch-Gladbach Wurfschaufel für Scheibenrotoren
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

Also Published As

Publication number Publication date
IT1160931B (it) 1987-03-11
DE7831676U1 (de) 1979-02-08
IT7869619A0 (it) 1978-11-16
US4207712A (en) 1980-06-17
IN149548B (enrdf_load_stackoverflow) 1982-01-16
JPS5478595A (en) 1979-06-22
JPS5551709B2 (enrdf_load_stackoverflow) 1980-12-25
CH623769A5 (enrdf_load_stackoverflow) 1981-06-30
EP0001969A1 (de) 1979-05-30
ZA786045B (en) 1979-10-31
DE2860478D1 (en) 1981-03-26

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