EP0084430A1 - Schleuderradmaschinen - Google Patents

Schleuderradmaschinen Download PDF

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Publication number
EP0084430A1
EP0084430A1 EP83300143A EP83300143A EP0084430A1 EP 0084430 A1 EP0084430 A1 EP 0084430A1 EP 83300143 A EP83300143 A EP 83300143A EP 83300143 A EP83300143 A EP 83300143A EP 0084430 A1 EP0084430 A1 EP 0084430A1
Authority
EP
European Patent Office
Prior art keywords
wearplate
abrasive
hood
lining assembly
wearplates
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
EP83300143A
Other languages
English (en)
French (fr)
Other versions
EP0084430B1 (de
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 AT83300143T priority Critical patent/ATE20845T1/de
Publication of EP0084430A1 publication Critical patent/EP0084430A1/de
Application granted granted Critical
Publication of EP0084430B1 publication Critical patent/EP0084430B1/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
    • B24C5/066—Housings; Accessories therefor, e.g. liners

Definitions

  • This invention relates to shot blast machinery and is particularly concerned with the wheel hood linings of such machinery.
  • a wheel hood lining as is well known to those skilled in the art, consists of a multiplicity of wearplates which are assembled together inside a wheel hood to surround a rotatable abrasive throwing wheel to protect the wheel hood from attack by the abrasive.
  • wearplates are formed of hard metal to give them a reasonably long working life but eventually they become worn and require replacement.
  • An example of hard metal which is a term well known to those familiar with the shot blast machinery industry, is that sold by the Applicants under the Trade Mark “Blastlyfe” which is a high chrome alloy. They constitute a significant part of the "spares" business in shot blast machinery.
  • An example of a typical wheel hood lining say, for a wheel hood for accommodating a 191 ⁇ 2 inch diameter throwing wheel consists of upper and lower end wearplates (two sets), right and left hand side wearplates (two sets), upper side wearplates (two) and an upper wearplate (one), i.e. 11 separate wearplates which require to be assembled together to provide the hood lining and 6 separate patterns are necessary to manufacture these 11 wearplates by casting.
  • a wheel hood lining consisting of two end wearplates, two side wearplates and an upper. wearplate with integral sides.
  • each side wearplate consists of two halves.
  • these wearplates will all be of hard metal but in some lower-powered applications the side wearplates (2 or 4 halves) may be made of white iron.
  • a wheel hood lining including an end wearplate formed with at least one inwardly-directed projection adapted to intervene in the flow path of abrasive accelerating around the hood thereby substantially to reduce the rate of wear on said end wearplate by the abrasive.
  • the projection serves to direct such abrasive back into the normal abrasive pattern of the throwing wheel and eliminates abrasive rebound into the hood thus increasing blasting efficiency.
  • the projections or "dams” as they will hereinafter be called for convenience may in the assembled lining extend horizontally inwards of the end wearplate, or they may be directed upwardly and inwardly, or downwardly and inwardly. This last configuration would most readily facilitate diversion of the abrasive into the throwing wheel abrasive pattern.
  • the wear dams of the leading end wearplate in terms of direction of wheel rotation i.e. the lefthand end wearplate for a clockwise rotating throwing wheel
  • the wear dams of the leading end wearplate in terms of direction of wheel rotation will serve to impede at least some of the abrasive which is normally carried round by the high speed rotating wheel (several thousand r.p.m.).
  • the abrasive which accelerates round the hood which does the wear damage.
  • the abrasive includes particles of different sizes and the finer particles are those which do most damage by scouring away the wearplates. Some of the coarser and thereby heavier abrasive particles fall back into the throwing wheel as they pass through the hood.
  • the upper wearplate may be-formed with at least one inwardly-directed wear dam which again intervenes into the flow path of the accelerating abrasive to decelerate same and/or cause at least some to be directed away from the wearplate.
  • Such wear dam(s) on the upper wearplate are more likely to be omitted than provided.
  • the upper wearplate at each end has an inwardly-directed formation which cooperates with a complementary inwardly-directed formation at the top of each end wearplate to constitute another wear dam.
  • the number and configuration of the wear dams can be varied provided they function to resist the wear effect of abrasive accelerating around the hood.
  • a secondary function of the wear dams on the end wearplates is that they divert such abrasive into the abrasive pattern of the throwing wheel.
  • the side wearplates are of trapezium.configuration with the usual hole for either the central infeed of abrasive to the throwing wheel or connection of the driving motor to the wheel directly or through the intermediary of a bearing housing.
  • the present invention also includes, separately or in any combination, an end wearplate, an upper wearplate and a side wearplate as hereinbefore defined.
  • hood is generally indicated by the reference 20 and the abrasive throwing wheel by the reference 21. Both of these are of well-known construction to those skilled in the art and will not be described further.
  • the lining for the hood in this instance, consists of two side wearplates 22, two end wearplates 23 and an upper wearplate 24.
  • the side wearplates 22 are of trapezium configuration and have a substantially centrally disposed circular hole 25, one for abrasive entry as indicated at 25A in Fig. 2 and the other for motor or bearing house connection as indicated at 25B in Fig. 2.
  • each side wearplate 22 may consist of two halves, the split line being indicated at 26 in Fig. 6. The two halves form a butt connection along this line 26.
  • the side wearplates 22 have recessed areas 27 for weight reduction and four screw-threaded studs 28 for use in securing them to the side walls of the hood 20.
  • edges of the side wearplates 22 are configured to cooperate with the edges of the end wearplates 23 and the upper wearplate 24 to make labyrinth joints as exemplified at 29 in Fig. 12. These joints resist.abrasive leakage in addition to relatively locating the wearplates making up a hood lining and are well known to those skilled in the art.
  • Each end wearplate 23 which is channel shaped is formed with two wear dams 30 on its internal face and a pair of locating lugs 23Lon its external face.
  • the wear dams 30 are, in this embodiment, a pair of spaced inwardly and downwardly directed flanges, that nearer the bottom being smaller than the other.
  • each end wearplate 23 has an inwardly-directed projection 31 which cooperates with a complementary formation 32 on the end of the upper wearplate 24 to provide a wear dam (see Fig. 1).
  • the upper wearplate 24 has integral sides 33 so that it is channel shaped (see Fig. 2) and in addition to end formations 32 has a centrally disposed cross flange 34 connecting its sides and forming a wear dam.
  • the upper wearplate 24 has on its external face two tapped bosses 35 for locating purposes.
  • the wearplates are assembled together to form a lining for the hood 20 as shown and screws or bolts 36 and 37 passing through the hood 20 engage between lugs 31 and in the bosses 35 to locate end wearplates 23 and the upper wearplate 24 of the assembly.
  • the screw-threaded studs 28 are employed to secure the side wearplates in position.
  • the wearplates are, of course, dimensioned to fit into different-sized and different constructions of wheel hoods.
  • wheel hoods for accommodating 12 inch, 15 inch and 19i inch diameter throwing wheels.
  • hoods see 20 in Fig. 1, have removable lids, see 36 in Fig. 1, for removal and insertion of worn and fresh wearplates and, of course, the throwing wheel, see 21 in Fig. 1.
  • a seal strip 38 is clamped between hood 20 and lid 37.
  • the wearplates must therefore be dimensioned and configured to permit such removal and insertion.
  • the formations 31A, 32A and 31B, '32B differ from formations 31, 32 but still provide the labyrinth and locating joint and the wear dam.
  • the wearplates of Fig. 13 are configured for a different hood to that used with the wearplates of Fig. 14 but, in each case, the configurations allow removal and insertion through the open top of the hood.
  • the end wearplate 23C is, in this instance, formed with a shielding flange 39 (see also Fig. 5) which serves to impede abrasive'tending to bounce up the back of the end wearplate 23C.
  • shielding flange may be provided on any of the end wearplates hereinbefore referred to.
  • the shielding flange 39 may be nearer the bottom of the end wearplate, in which case, it is smaller, or it may be at the bottom edge of the end wearplate.
  • the upper wearplate 24C may be clamped to the end wearplates 23C via bosses 40 and spring or other clips (not showm) instead of being located by bolts or screws 37.
  • the hood 20C has straight sides, the lid 36C being dish-shaped and retained in position by bolts 41 and wing nuts 42.
  • the present invention also encompasses the combination of wearplates as hereinbefore defined and described and the hood with or without the abrasive throwing wheel and associated operational components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Liquid Crystal Substances (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Glass Compositions (AREA)
EP83300143A 1982-01-16 1983-01-12 Schleuderradmaschinen Expired EP0084430B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83300143T ATE20845T1 (de) 1982-01-16 1983-01-12 Schleuderradmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8201204 1982-01-16
GB8201204 1982-01-16

Publications (2)

Publication Number Publication Date
EP0084430A1 true EP0084430A1 (de) 1983-07-27
EP0084430B1 EP0084430B1 (de) 1986-07-23

Family

ID=10527663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83300143A Expired EP0084430B1 (de) 1982-01-16 1983-01-12 Schleuderradmaschinen

Country Status (4)

Country Link
EP (1) EP0084430B1 (de)
AT (1) ATE20845T1 (de)
DE (1) DE3364555D1 (de)
GB (1) GB2113127B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530976A1 (de) * 1982-04-09 1984-02-03 Kennecott Corp
WO2017092806A1 (en) * 2015-12-02 2017-06-08 Wheelabrator Group Limited Spring assembly to position liners in a blast wheel machine
CN110170928A (zh) * 2019-07-03 2019-08-27 大丰市申达机械制造有限公司 一种拼装抛丸器护罩

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA829118B (en) * 1982-03-08 1983-09-28 Kennecott Corp Impact blasting system for etching metal surfaces
CN113478400A (zh) * 2021-07-13 2021-10-08 齐齐哈尔赛石精工机械制造有限公司 一种抛丸器壳体

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1477976A1 (de) * 1962-11-29 1969-07-17 Pangborn Corp Teilchenstrahlvorrichtung
US3800474A (en) * 1972-06-26 1974-04-02 B Fuerst Liner plate junction seal
DE2437493A1 (de) * 1974-08-03 1976-02-12 Berger Maschf Gmbh Abdeckhaube mit hochschwenkbarem deckel fuer schleuderraeder von strahlreinigungsmaschinen
US4291509A (en) * 1979-10-22 1981-09-29 Wheelabrator-Frye Inc. Guard housing and liner for bladed centrifugal blasting wheels

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1477976A1 (de) * 1962-11-29 1969-07-17 Pangborn Corp Teilchenstrahlvorrichtung
US3800474A (en) * 1972-06-26 1974-04-02 B Fuerst Liner plate junction seal
DE2437493A1 (de) * 1974-08-03 1976-02-12 Berger Maschf Gmbh Abdeckhaube mit hochschwenkbarem deckel fuer schleuderraeder von strahlreinigungsmaschinen
US4291509A (en) * 1979-10-22 1981-09-29 Wheelabrator-Frye Inc. Guard housing and liner for bladed centrifugal blasting wheels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530976A1 (de) * 1982-04-09 1984-02-03 Kennecott Corp
WO2017092806A1 (en) * 2015-12-02 2017-06-08 Wheelabrator Group Limited Spring assembly to position liners in a blast wheel machine
CN110170928A (zh) * 2019-07-03 2019-08-27 大丰市申达机械制造有限公司 一种拼装抛丸器护罩

Also Published As

Publication number Publication date
EP0084430B1 (de) 1986-07-23
GB2113127A (en) 1983-08-03
GB2113127B (en) 1986-08-20
GB8300758D0 (en) 1983-02-16
ATE20845T1 (de) 1986-08-15
DE3364555D1 (en) 1986-08-28

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