EP0002179B1 - Schleuderrad für Schleuderstrahlmaschinen - Google Patents

Schleuderrad für Schleuderstrahlmaschinen Download PDF

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Publication number
EP0002179B1
EP0002179B1 EP78100997A EP78100997A EP0002179B1 EP 0002179 B1 EP0002179 B1 EP 0002179B1 EP 78100997 A EP78100997 A EP 78100997A EP 78100997 A EP78100997 A EP 78100997A EP 0002179 B1 EP0002179 B1 EP 0002179B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal
wheel
blades
discs
propelling
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
EP78100997A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0002179A1 (de
Inventor
Jindrich Dipl.-Ing. Fiala
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 EP0002179A1 publication Critical patent/EP0002179A1/de
Application granted granted Critical
Publication of EP0002179B1 publication Critical patent/EP0002179B1/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 centrifugal jet machines with two rotating wheel disks which are spaced apart by spacers, a plurality of centrifugal vanes which are evenly distributed over the circumference, provided with side strips and can be inserted in radial grooves from the inside, and with fixed stops which hold the centrifugal vanes in the radial direction .
  • centrifugal wheels of the type mentioned at the outset have become known, in which the length of the centrifugal display is smaller than the diameter of the built-in from the inner edges of the centrifugal blade Condition of the central room. So that the centrifugal blades can also be mounted for replacement from the central space of the centrifugal wheel, it is necessary that the opening of the front wheel disc and the opening of the front centrifugal wheel cover are larger in diameter than the total length of the centrifugal blade.
  • the outer diameters of the wheel disks are therefore dependent on the length of the cutter blade, which means that the centrifugal wheel cannot be optimally designed with regard to its centrifugal effect while the rotating masses are low. An increase in the discharge speed at a constant speed by using longer centrifugal blades is therefore also not possible with the centrifugal wheels shown here.
  • the spacers between the wheel disks simultaneously form the stops for holding the centrifugal blades outwards, which means that each centrifugal blade must be assigned a spacer.
  • the spacers and thus the usually weaker front wheel disc are unnecessarily loaded by the centrifugal force of the rotating centrifugal blades.
  • the stops in the form of recesses and lugs or insertion pins are also arranged in both wheel disks.
  • centrifugal wheels with centrifugal blades that can be pushed in from the outside (DE-PS 2115354)
  • it is possible to install centrifugal vanes of any length in a given centrifugal wheel but in order to hold the centrifugal vanes, outwardly movable stops in the form of sleeves rotatable on the spacer bolts are required.
  • Such stops are very expensive and they can often be moved nu, with great effort and with special tools by the jammed abrasive particles so that the centrifugal blades can be replaced from the outside.
  • the object of the present invention is to provide a centrifugal wheel of the type mentioned at the outset, in which the length of the centrifugal blades can be selected as desired for an optimal design of the centrifugal wheel or for an adaptation of the discharge speed of the blasting agent to the items to be treated.
  • each centrifugal blade can be inserted from the outside between the wheel discs in a position rotated relative to the centrifugal wheel axis until the side strips are in the central free space and then from the inside in the grooves of the wheel discs up to a fixed one Stop pushed back.
  • centrifugal vanes of any length can be used independently of the centrifugal wheel dimensions.
  • a wheel disk 3 forming the shaft side wall is fastened to a flange 2 of the drive shaft 1 by means of screws 29, while a wheel disk 4 forming the front side wall is held at a certain distance from the wheel disk 3 by means of spacers 5.
  • centrifugal blades 6 are evenly distributed between the wheel disks 3 and 4 in the radial direction, the outer edges of which protrude beyond the outer diameter of the wheel disks 3, 4, while their inner ones However, edges 22 do not extend to the axis of rotation of the centrifugal wheel and thereby form a central free space 7.
  • the centrifugal wheel is enclosed in a housing 8 which is open at one location on the circumference for the exit of the blasting medium thrown away by the centrifugal wheel.
  • a device for the blasting agent supply and for the control of the centrifugal jet In the central free space 7 there is a device for the blasting agent supply and for the control of the centrifugal jet.
  • This device consists of a cylindrical regulator basket 9 with an outlet opening 10 for the blasting agent.
  • the controller basket 9 is attached to the housing 8 and centered in a central opening 27 of the housing 8.
  • the position of the outlet opening 10 can be adjusted by a rotational movement in relation to the housing 8, as a result of which the direction of the abrasive particles thrown by the centrifugal wheel is determined.
  • An impeller 11 is arranged in the interior of the controller cage 9, which serves to pre-accelerate the blasting medium and is fastened centrally to the drive shaft 1 together with a centering plate 12 with a screw 13. Centering plate 12 and impeller 11 can also consist of one piece, as shown in FIG. 1.
  • a feed pipe 14 centered in the control cage 9 and fastened to the housing 8 serves for the blasting agent feed into the interior of the impeller 11.
  • the centrifugal blades 6 are provided with side strips 15 which, when the centrifugal blades are inserted, come to rest in radial, opposing grooves 16 of the wheel disks 3, 4.
  • the length of the grooves 16 corresponds to the length of the side strips 15, so that in the installed state the side strips 15 do not protrude beyond the outside diameter of the wheel disks 3, 4.
  • the side strips 15 and the grooves 16 only have to be as long as is necessary for the transmission of the peripheral forces from the centrifugal blades 6 to the wheel disks 3 and 4 without excessive surface pressures and for reliable guidance of the centrifugal blades 6.
  • the central free space 7 for inserting the centrifugal blades 6 into the grooves 16 must be slightly larger in diameter from the inside than the length of the side strips 15. Since the regulator cage 9 is also arranged in this space 7, this condition is usually already required Dimensions of the controller basket 9 met (see Fig. 3).
  • the part 17 of the centrifugal vane 6 protruding beyond the side strips each has a raised edge 18 on the side of the throwing surfaces, which serves to guide the blasting medium.
  • the width 19 of the part 17, including the edges 18, is smaller than the free distance 20 between the wheel disks 3 and 4 (see FIGS. 1 and 4).
  • the centrifugal blades 6 have a material projection 21 on the outer surface of a side bar 15.
  • This material projection 21 which has a rectangular cross section, extends from the inner edge 22 over a partial length of the side bar 15.
  • the end of the material projection 21 facing the blade discharge edge is separated by two inclined surfaces 23 running towards one another and a stop surface 24 running perpendicular to the direction of insertion educated.
  • recesses 25 are arranged at the inner end of the grooves, the circular-arc-shaped outer end of which is a contact surface 26.
  • This contact surface 26 forms, together with the stop surface 24 of the material projection, a fixed stop 30, which limits the insertion path and holds the centrifugal blades 6 outward in the radial direction.
  • the centrifugal blades 6 are held against the inside by the outer peripheral surface of the centering plate 12.
  • fixed stops 30 such as. B. a pin arranged on the wheel disc, which cooperates with a stop surface on the side bar of the Schteudersehaufe).
  • a spacer 5 is only permanently connected to the two wheel disks 3, 4 between every second centrifugal blade 6.
  • the replacement due to wear or damage to unusable centrifugal blades 6 takes place as follows (see also FIGS. 3 and 4).
  • the feed pipe 14 for the blasting agent must be removed from the housing 8, whereby the regulator cage 9, the impeller 11, the centering plate 12 and the screw 13 are freely accessible.
  • the centering plate 12 and the impeller 11 can be pulled out together with the regulator cage 9 in the axial direction through the central opening 27.
  • the centrifugal blades 6 are free so that they can be moved inwards into the central space 7.
  • the centrifugal blades are accessible from the outside.
  • the mostly fixed centrifugal blades 6 are pushed inwards until the side strips 15 emerge from the grooves 16. This is made possible by the larger diameter of the free space 7 compared to the length of the side strips 15.
  • the part 17 of the centrifugal blades 6 protruding beyond the side strips 15 is still between the two wheel disks 3 and 4. Since the width 19 of this part 17 is now slightly smaller than the distance 20 of the wheel discs 3 and 4, the centrifugal blade 6 can now their longitudinal axis are pivoted so that they unite to the spin axis takes an acute angle (see Fig. 4). In this position, the centrifugal blade 6 can be pulled outwards.
  • the replacement blades can now be pushed in between the wheel disks 3, 4 in the same oblique position until they can be inserted from the inside with their side strips 15 into the grooves 16 after pivoting into a position parallel to the centrifugal axis.
  • the centrifugal blades 6 By pushing the centrifugal blades 6 radially out to the stop of the material projection 21 in the recess 25, the outer end position of the centrifugal blades is reached. Then the centering plate 12, the impeller 11 and the regulator cage 9 can be reinstalled, the built-in centrifugal blades 6 being held inwards by the centering plate 12.
  • the grooves 16 and the side strips 15 are wedge-shaped for the purpose of better disassembly.
  • the grooves and the sidebars can also be designed with parallel surfaces.
  • centrifugal wheel according to the invention enables the use of centrifugal vanes of any length, which protrude beyond these irrespective of the size of the wheel disks, while at the same time the fixed stops for holding the centrifugal vanes outwards make it easy to replace centrifugal vanes without special tools.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Centrifugal Separators (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP78100997A 1977-11-17 1978-09-27 Schleuderrad für Schleuderstrahlmaschinen Expired EP0002179B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14040/77 1977-11-17
CH1404077A CH623770A5 (enrdf_load_stackoverflow) 1977-11-17 1977-11-17

Publications (2)

Publication Number Publication Date
EP0002179A1 EP0002179A1 (de) 1979-06-13
EP0002179B1 true EP0002179B1 (de) 1981-04-29

Family

ID=4397443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100997A Expired EP0002179B1 (de) 1977-11-17 1978-09-27 Schleuderrad für Schleuderstrahlmaschinen

Country Status (8)

Country Link
US (1) US4203263A (enrdf_load_stackoverflow)
EP (1) EP0002179B1 (enrdf_load_stackoverflow)
JP (1) JPS5475694A (enrdf_load_stackoverflow)
CH (1) CH623770A5 (enrdf_load_stackoverflow)
DE (2) DE2860665D1 (enrdf_load_stackoverflow)
IN (1) IN150935B (enrdf_load_stackoverflow)
IT (1) IT1160932B (enrdf_load_stackoverflow)
ZA (1) ZA786046B (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4480413A (en) * 1979-09-24 1984-11-06 Wheelabrator-Frye Inc. Bladed centrifugal blasting wheel
US4333278A (en) * 1979-09-24 1982-06-08 Wheelabrator-Frye Inc. Bladed centrifugal blasting wheel
DE3904043C1 (enrdf_load_stackoverflow) 1989-02-10 1990-05-17 W. Kordes' Soehne Rosenschulen Gmbh & Co Kg, 2206 Klein Offenseth-Sparrieshoop, De
DE102006029437B4 (de) * 2006-06-20 2011-09-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zum Schleuderstrahlen von empfindlichen Strahlmitteln, insbesondere Trockeneis
CN110328622A (zh) * 2019-07-08 2019-10-15 昆山亚比斯环保包装材料有限公司 一种叶片、叶轮结构及叶轮紧扣式喷击机械
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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH412613A (de) * 1962-11-16 1966-04-30 Geisseler Max Schleuderrad
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
GB1430220A (en) * 1973-12-14 1976-03-31 Tilghman Wheelabrator Ltd Throwing wheels
GB1500092A (en) * 1975-10-24 1978-02-08 Tilghman Wheelabrator Ltd Blast impellor wheels

Also Published As

Publication number Publication date
DE2860665D1 (en) 1981-08-06
US4203263A (en) 1980-05-20
DE7831673U1 (de) 1979-02-08
IT7869620A0 (it) 1978-11-16
EP0002179A1 (de) 1979-06-13
IT1160932B (it) 1987-03-11
ZA786046B (en) 1979-09-26
JPS5551708B2 (enrdf_load_stackoverflow) 1980-12-25
JPS5475694A (en) 1979-06-16
IN150935B (enrdf_load_stackoverflow) 1983-01-22
CH623770A5 (enrdf_load_stackoverflow) 1981-06-30

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