EP0148775A2 - Schleuderstrahlräder - Google Patents

Schleuderstrahlräder Download PDF

Info

Publication number
EP0148775A2
EP0148775A2 EP85300123A EP85300123A EP0148775A2 EP 0148775 A2 EP0148775 A2 EP 0148775A2 EP 85300123 A EP85300123 A EP 85300123A EP 85300123 A EP85300123 A EP 85300123A EP 0148775 A2 EP0148775 A2 EP 0148775A2
Authority
EP
European Patent Office
Prior art keywords
blade
side plates
throwing wheel
abrasive
faces
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
EP85300123A
Other languages
English (en)
French (fr)
Other versions
EP0148775B1 (de
EP0148775A3 (en
Inventor
William Robertson Macmillan
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.)
Tilghman Wheelabrator Ltd
Original Assignee
Tilghman Wheelabrator Ltd
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 Tilghman Wheelabrator Ltd filed Critical Tilghman Wheelabrator Ltd
Priority to AT85300123T priority Critical patent/ATE38006T1/de
Publication of EP0148775A2 publication Critical patent/EP0148775A2/de
Publication of EP0148775A3 publication Critical patent/EP0148775A3/en
Application granted granted Critical
Publication of EP0148775B1 publication Critical patent/EP0148775B1/de
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

  • This invention relates to centrifugal abrasive throwing wheels such as are used in shot blasting machinery.
  • the invention relates particularly to the blades employed in such a throwing wheel and is especially but not exclusively concerned with blades which are fitted into and withdrawn from such a throwing wheel through a central opening of the throwing wheel, the blades being retained in position within the wheel by abutment of formations on the blades and the wheel per se which wheel generally consists of two side plates between which the blades are disposed, generally in radial attitude, and which side plates are conjoined by spacers, each side plate having a central opening. Inward movement of the blades in the assembled throwing wheel is prevented by the presence of the customary removable centering plate or combined centering plate and vane-type impellor traversing the central openings of the side plates.
  • the side plates of the throwing wheel are, as is customary, radially slotted or grooved to receive and locate the lateral edges of the blades, each slot at its inner end, i.e. adjacent to the central opening, being deeper than the remainder of the slot to define a ledge against which abuts a protuberance or nose provided on each lateral edge or rail of the blade.
  • this Patent there is disclosed lateral radial location of the blades between the side plates.
  • both faces of the blade are idential so that the throwing wheel is operationally reversible.
  • the blades With either of such blade mountings, the blades, as the throwing wheel rotates at high speed, tend to lie back, in terms of direction of rotation of the throwing wheel, in the slots in the side plates so that clearance occurs between the front faces of the lateral edges of the blades and the adjacent slot walls.
  • fine particle abrasive and/or contaminants flow up between the front faces of the lateral edges of the blades and the adjacent slot walls which results in substantial wear on the peripheries of the side plates. This is unsatisfactory, and is not acceptable to the operator of the shot blasting machinery since while he expects to replace worn blades at fairly frequent intervals he does expect a substantially longer working life from the throwing wheel per se.
  • a blade for a throwing wheel for use in shot blasting machinery the blade at each lateral edge outboard of its inner end, i.e. that end nearer the centre of the throwing wheel when the blade is fitted in a throwing wheel, having a sealing strip of natural or synthetic polymeric or elastomeric material which stands proud of the front, back and side faces of said lateral edge.
  • the cross-section of the sealing strip and its accommodating retention groove in the lateral edge of a blade may be, for example, round or square but a preferred cross-section is dovetail which will prevent any inadvertent lateral egress of a sealing strip when a blade is being pushed into position between the side plates, i.e. it will not roll out.
  • the sealing strips may conveniently be formed of, for example, natural or synthetic rubber or polyurethane.
  • Each sealing strip retention groove when viewed from the side of the blade, has a central parallel region which diverges towards the front and back faces of the blade. This divergence assists insertion (or removal) of the sealing strip, from either face, into (or out of) its retention groove.
  • an abrasive throwing wheel for use in shot blasting machinery, the wheel incorporating a plurality of blades as defined in the seven immediately preceding paragraphs.
  • the throwing wheel assembly and blades are substantially as disclosed and illustrated in our aforesaid United Kingdom Patent, the content of which is included herein by reference but it is to be noted that the nylon blade retention studs and holes for accommodating same referred to in our aforesaid Patent are omitted for a reason which will become clear later.
  • a blade 10 is cast in one piece and is of a substantial rectangular shape with an I-shaped transverse cross-sectional (Fig. 3) to provide lateral or side rails 11.
  • An inner part of the blade 10 is intended to be located between side plates 12 of a throwing wheel (see Fig. 5) and an outer part of the blade 10 is intended to project beyond the rims or peripheries 13 of the side plates 12.
  • the two faces 14 of the blade 10 are identical. At the outer part of the blade the faces are smooth and parallel and at the inner part (see Figs. 2 and 3) the faces 14 curve slightly inwards toward each other as indicated at 15. The reason for this curvature is to save wear on the blade 10 by the abrasive as it first strikes the blade 10.
  • the side edges of the faces 14 are radiussed (see Fig. 3) to merge with the rails 11 of the blade 10 to prevent abrasive lodging in the blade 10 itself.
  • the flanges 11 of the blade 10 are also identical.
  • the end 18 of the protuberance 17 is angled and formed into a blunted nose 19 pointing towards the outer end of the blade 10 and the outer surface 16 of the rails 11 are cut away at 20 so that the nose 19 of the protuberances 17 stands out in relief.
  • the throwing wheel is of generally known construction (see our aforesaid Patent). It comprises two side plates 12 between which, say, six or eight of the blades 10 are located, there being a central opening 21 in the side plates 12 and in which a vane-tyoe impellor 22 with integral centering plate 23 are located and through which the abrasive is fed to the blades 10 from a feed spout 24 and a stationary control cage 25 which has the customary inner return flange omitted and which surrounds the impellor 22 and which is also located in the central opening 20 of the two side plates 12.
  • integral impellor 22 and centering plate 23 without the customary intervening control cage return flange permits a longer impellor and thus larger slots 26 in the impellor 22 to be employed so allowing more abrasive to flow through the wheel.
  • the blades 10 are retained in the side plates 12 in six or eight pairs of equi-angularly-spaced radial slots 27 machined in the side plates 12 of the wheel and which extend from the inner diameter of the wheel to the outside diameter or rim.
  • each of the slots 27 are cut deeper than the rest of the slot 27 so that there is a part-circular ledge 29 against which the nose 19 of a protuberance 17 on a blade 10 will abut. There is clearance between the ledges 29 and the protuberances 17 in the assembled wheel to prevent the abrasive lodging between them and causing wear.
  • the side plates 12 are conjoined by equi-angular spacers 30.
  • the length of the blades 10 and the dimensions of the central opening 21 in the side plates 12 are such that the blades 10 can be fitted into the wheel through the central opening 21.
  • the blades 10 slide into the pairs of slots 27 and the inner parts of the blades 10 abut the integral centering plate 23.
  • the side plates 12, impellor 22 and integral centering plate 23 and blades 10 are rotated via a wheel hub 34 bolted as indicated at 34A to one of the side plates 12 and a shaft 34B bolted as indicated at 37 to the centering plate 23.
  • Abrasive is fed down the feed spout 24, through the impellor 22 and out, via the control cage 25, onto the faces of the blades 10 to be accelerated and directed onto the workpiece to be blasted.
  • the bides 10 are such that the blast impellor wheel can be used to direct abrasive in each of the two directions of rotation of the wheel, as required, by merely reversing the direction of rotation of the wheel.
  • centering plate 23 extends radially outwardly of the impellor 22 completely to clock the central opening 21 of the adjacent side plate 12, thus presenting an impediment to the passage of any abrasive through the opening 21 into the region of the wheel hub 34 and shaft 34B.
  • the blades 10 When the throwing wheel is rotating, the blades 10 are retained in position by the abutment of the protuberances 17 of the blades 10 against the ledges 29 of the slots 27 in the side plates. 12, which is brought about by centrifugal force.
  • the blades 10 tend to lie back against the back walls 27A of their locating slots 27.
  • a blade 10 will tend to lie back so that the back surface 11A of the rails 11 will lie against slot wall 27A thus creating a clearance between the front surfaces 11B of the rails 11 and slot walls 27B.
  • the blade 10 is not a frictional fit in the slots 27 so that clearance exists between the lateral faces 16, of the rails 11 and the lateral faces 27C of the slots 27.
  • each rail 11 of each blade 10, according to this invention is formed outboard of its inner end and inboard of the protuberance or note 19 with a retention groove 35 into which is fitted a sealing strip 36 of natural or synthetic rubber or a plastics material.
  • This sealing strip 36 stands proud of the front, back and outer side surfaces of each rail as can be seen in Figs. 4, 6 and 7.
  • a preferred retention groove 35 configuration is dovetail as indicated in Figs. 6 and 7, the sealing strips 36 being correspondingly shaped. The sealing strips, in this instance, would be inserted endways into the grooves 35.
  • the retention grooves 35 when viewed from the side of the blade, have a central parallel portion merging with outwardly flared or diverging portions, the latter facilitating insertion (or withdrawal) of a sealing strip 36 into the groove 35.
  • the sealing strips 36 are, in fact, preferably force fitted into the retention grooves 35 but they may be retained by any convenient method, for example keying or adhesive.
  • These sealing strips 25 also assist location and retention of the blades 10 between the side plates 12 during throwing wheel assembly in that they frictionally hold the blades 10 in position between the side plates 12 until the central assembly of impellor 22 and centering plate 23 are in position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP85300123A 1984-01-11 1985-01-08 Schleuderstrahlräder Expired EP0148775B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85300123T ATE38006T1 (de) 1984-01-11 1985-01-08 Schleuderstrahlraeder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8400627 1984-01-11
GB848400627A GB8400627D0 (en) 1984-01-11 1984-01-11 Centrifugal abrasive throwing wheels

Publications (3)

Publication Number Publication Date
EP0148775A2 true EP0148775A2 (de) 1985-07-17
EP0148775A3 EP0148775A3 (en) 1986-05-28
EP0148775B1 EP0148775B1 (de) 1988-10-19

Family

ID=10554804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85300123A Expired EP0148775B1 (de) 1984-01-11 1985-01-08 Schleuderstrahlräder

Country Status (5)

Country Link
EP (1) EP0148775B1 (de)
AT (1) ATE38006T1 (de)
DE (1) DE3565647D1 (de)
GB (2) GB8400627D0 (de)
ZA (1) ZA85175B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000835A1 (en) * 1990-07-06 1992-01-23 Tilghman Wheelabrator Limited Abrasive throwing wheel assemblies
EP0673718A1 (de) * 1994-03-26 1995-09-27 SCHLICK-Roto-Jet Maschinenbau GmbH Schleuderrad mit Verteilerrad
EP1352713A1 (de) * 2002-04-13 2003-10-15 Damir Dipl.-Ing. Jankov Schleuderrad
US8016444B2 (en) 2005-08-18 2011-09-13 Lg Electronics Inc. Washing machine having lamp device and control method of the same
US8142037B2 (en) * 2007-04-12 2012-03-27 Bsh Bosch Und Siemens Hausgeraete Gmbh Ribbon cable lighting for a water-bearing household appliance
CN117584051A (zh) * 2023-11-07 2024-02-23 潍坊兴泰机械有限公司 一种合金耐磨抛丸机叶片

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2017003775A (es) * 2014-09-25 2017-06-29 Wheelabrator Group Ltd Alabe para rueda de maquina de chorro y metodo para mantener una rueda de maquina de chorro.
CN107378798B (zh) * 2017-08-02 2023-08-29 常州泰盛机械设备有限公司 抛丸器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel
US3936979A (en) * 1974-10-10 1976-02-10 Benfur Engineering Company Particle-releasing mounting system for the blades of blasting machines
GB1500092A (en) * 1975-10-24 1978-02-08 Tilghman Wheelabrator Ltd Blast impellor wheels

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000835A1 (en) * 1990-07-06 1992-01-23 Tilghman Wheelabrator Limited Abrasive throwing wheel assemblies
GB2260722A (en) * 1990-07-06 1993-04-28 Tilghman Wheelabrator Ltd Abrasive throwing wheel assemblies
GB2260722B (en) * 1990-07-06 1995-01-18 Tilghman Wheelabrator Ltd Abrasive throwing wheel assemblies
US5577953A (en) * 1990-07-06 1996-11-26 Tilghman Wheelabrator Limited Abrasive throwing wheel assemblies
EP0673718A1 (de) * 1994-03-26 1995-09-27 SCHLICK-Roto-Jet Maschinenbau GmbH Schleuderrad mit Verteilerrad
EP1352713A1 (de) * 2002-04-13 2003-10-15 Damir Dipl.-Ing. Jankov Schleuderrad
US8016444B2 (en) 2005-08-18 2011-09-13 Lg Electronics Inc. Washing machine having lamp device and control method of the same
US8142037B2 (en) * 2007-04-12 2012-03-27 Bsh Bosch Und Siemens Hausgeraete Gmbh Ribbon cable lighting for a water-bearing household appliance
CN117584051A (zh) * 2023-11-07 2024-02-23 潍坊兴泰机械有限公司 一种合金耐磨抛丸机叶片

Also Published As

Publication number Publication date
GB8400627D0 (en) 1984-02-15
GB2152411B (en) 1987-02-25
ATE38006T1 (de) 1988-11-15
DE3565647D1 (en) 1988-11-24
GB2152411A (en) 1985-08-07
GB8500392D0 (en) 1985-02-13
EP0148775B1 (de) 1988-10-19
EP0148775A3 (en) 1986-05-28
ZA85175B (en) 1986-04-30

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