EP0084430B1 - Schleuderradmaschinen - Google Patents

Schleuderradmaschinen Download PDF

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Publication number
EP0084430B1
EP0084430B1 EP83300143A EP83300143A EP0084430B1 EP 0084430 B1 EP0084430 B1 EP 0084430B1 EP 83300143 A EP83300143 A EP 83300143A EP 83300143 A EP83300143 A EP 83300143A EP 0084430 B1 EP0084430 B1 EP 0084430B1
Authority
EP
European Patent Office
Prior art keywords
hood
wearplate
abrasive
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.)
Expired
Application number
EP83300143A
Other languages
English (en)
French (fr)
Other versions
EP0084430A1 (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 a lining assembly for the wheel hood of such machinery.
  • a wheel hood lining assembly 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 housed in the hood and which serve to protect the wheel hood from attack by the abrasive accelerated around the hood by the throwing wheel prior to being impelled out through an open side of the hood.
  • 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 signficant part of the "spares" business in shot blast machinery.
  • Lining assemblies comprising various numbers of wearplates are well known to those skilled in the art.
  • Such assemblies of wearplates provide many joints through which abrasive may leak to cause wear in the wheel hood thus necessitating maintenance and eventual replacement with consequent cost to the user.
  • lining assemblies are known from DE-AI-2437493 which discloses a lining assembly consisting of two end wearplates, two side wearplates and an upper wearplate, and from US-A-3800474 which discloses two end wearplates, two multi-part side wearplates and an upper wearplate with the joints between the wearplates being of labyrinthal configuration.
  • a lining assembly for a hood for use in shot blast machinery and adapted to house a rotatable throwing wheel for centrifugally impelling abrasive out through an open side of the hood in the direction of a workpiece to be cleaned the lining assembly consisting of two side wearplates, two end wearplates, and an upper wearplate adapted to be arranged within the hood with their adjacent edges in butted relationship to cover and thereby protect the inner wall surfaces of the hood without impeding the open side of the hood and with their butting edges configured to define locating the labyrinthal joints, and being characterised in that each end wearplate is formed with at least one inwardly-directed projection or dam which, when the end wearplates are fitted inside the hood with the rotatable throwing wheel housed therein, extends into the flow path of abrasive accelerated around the hood by the throwing wheel prior to being impelled out through the open side thereof by the latter thereby substantially
  • 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 hod 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 extends into the flow path of the accelerating abrasive to decelerate same and/or cause at least some to be directed away from the wearplate and back towards the throwing wheel.
  • 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, and provided they return such abrasive into the abrasive pattern of the throwing wheel to reduce reboound and to increase blasting efficiency.
  • the side wearplates are preferably 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.
  • Another aspect of the invention is an end wearplate as claimed in claim 13.
  • 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 23L on 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 different diameter throwing wheels.
  • hoods see 20 in Fig. 1, have removable lids 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. 4 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 shown) 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.

Landscapes

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

Claims (14)

1. Auskleidung für eine Haube (20) zur Verwendung in einer Strahlputzmaschine und zur Unterbringung eines drehbaren Schleuderrades (21), um Strahlmittel durch eine offene Seite der Haube (20) zentrifugal in Richtung eines zu putzenden Werkstückes herauszuschleudern, wobei die Auskleidung aus zwei seitlichen Verschleißplatten (22), zwei Stirnverschleißplatten (23) und einer oberen Verschleißplatte (24) besteht, die in der Haube (20) anbringbar sind, wobei ihre benachbarten Kanten aneinander stoßen, um die Innenwandflächen der Haube zu überdecken und dadurch zu schützen, ohne die offene Seite der Haube (20) zu beeinträchtigen, und wobei ihre aneinanderstoßenden Kanten so geformt sind, daß sie labyrinthförmige Verbindungen (29) zur Positionierung bilden, dadurch gekennzeichnet, daß jede Stirnverschleißplatte (23) mit mindestens einem nach innen gerichteten Vorsprung oder Damm (30) ausgebildet ist, der dann, wenn die Stirnverschleißplatten (23) im Inneren der Haube (20) einegesetzt sind, wobei das drehbare Schleuderrad (21) darin untergebracht ist, sich in den Strömungsweg des Strahlmittels erstreckt, das von dem Schleuderrad (21) um die Haube (20) herum beschleunigt wird, bevor es durch deren offene Seite herausgeschleudert wird, so daß die Verschleißrate an der Stirnverschleißplatte (23) wesentlich reduziert wird, und der zur offenen Seite der Haube (20) gerichtet ist, so daß der darauf treffendes Strahlmittel so führt, daß es in das normale Strahlmittelmuster zurückgeleitet wird, das von dem rotierenden Schleuderrad (21) erzeugt wird, so daß dadurch der Strahlmittel-. rückprall innerhalb der Haube (20) wesentlich reduziert und infolgedessen die Strahleffizienz vergrößert wird.
2. Auskleidung nach Anspruch 1, gekennzeichnet durch zwei oder mehr derartiger nach innen gerichteter Formationen oder Dämme (30), die im Abstand über die Läge der Stirnverschleißplatte (23) angeordnet sind.
3. Auskleidung nach Anspruch 2, dadurch gekennzeichnet, daß die Vorsprünge oder Dämme (30) in der Länge abnehmen je dichter sie sich an der Haubenöffnung befinden, wenn die Stirnverschleißplatte (23) in die Haube (20) eingesetzt ist.
4. Auskleidung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß jede Stirnverschleißplatte (23) an ihrem von der Haubenöffnung abgelegenen Ende eine nach innen gerichtete Formgebung (31) besitzt, die zur Zusammenwirkung mit einer komplementären, nach innen gerichteten Formgebung (32) an dem anstroßenden Ende der oberen Verschleißplatte (24) ausgelegt ist, um einen nach innen und unten gerichteten Verschleiß-Vorsprung oder -Damm (31, 32) zu bilden.
5. Auskleidung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß jede Stirnverschleißplatte (23) kanalförmigen Querschnitt besitzt.
6. Auskleidung nach einem der Ansprüche 1 bis 5, gekennzeichnet durch ein Paar von beabstandeten Positionierungsansätzen (23L) an der Seite der jeweiligen Stirnverschleißplatte (23), die von der (den) Verschleißformation(en) oder dem Damm (den Dämmen) abgelegen ist, wobei die Ansätze so ausgelegt sind, daß sie einen von der Haube (20) getragenen Posiionierungs- und Befestigungsbolzen oder eine Schraube (36) aufnehmen.
7. Auskleidung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß jede Stirnverschleißplatte (23) auf ihrer Seite, die der Haube . benachbart ist, wenn die Stirnverschleißplatte darin eingesetzt ist, einen Abschirmungsflansch (39) aufweist, der so ausgelegt ist, daß er den Durchgang von Strahlmittel zwischen dieser Seite und der Haube (20) verhindert.
8. Auskleidung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die obere Verschleißplatte (24) mindestens einen Verschleiß-vorsprung oder Damm (34) aufweist, der nach innen gerichtet ist und sich in den Strömungsweg des beschleunigenden Strahlmittels erstreckt, um dieses abzubremsen und/oder dafür zu sorgen, daß zumindest einiges davon in Richtung des rotierenden Schleuderrades zurückgeführt wird.
9. Auskleidung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die obere Verschieißplatte (24) eine kanalförmige Konfiguration .mit integralen Seiten (33) besitzt.
10. Auskleidung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die obere Verschleißplatte (24) auf ihrer äußeren, das heißt der Haube benachbarten, Seite zwei Gewindevorsprünge (35) aufweist, um von der Haube (20) getragene Positionierungs- und Befestigungsbolzen oder Schrauben (37) aufzunehmen.
11. Auskleidung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß jede Seitenverschleißplatte (22) aus zwei halben Verschleißplatten besteht, die längs einer zur Decke und zum Boden der Haube (20) senkrechten Linie gegeneinander stoßen, wenn die Seitenverschleißplatte (22) darin eingesetzt ist.
12. Auskleidung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß jede Seitenverschleißplatte (22) ein Mittelloch (25) sowie Schraubgewindebolzen (28) aufweist, um diese an der Seitenwand der Haube (20) zu befestigen.
13. Stirnverschleißplatte einer Auskleidung für eine Haube (20) zr Verwendung in einer Strahlputzmaschine und zur Unterbringung eines drehbaren Schleuderrades (21), um Strahlmittel durch eine offene Seite der Haube (20) in Richtung eines zu putzenden Werkstückes zentrifugal herauszuschleudern, wobei die Stirnverschleißplatte (23) dadurch gekennzeichnet ist, daß sie mit mindestens einem Vorsprung (30) an ihrer dem Schleuderrad (21) benachbarten Seite ausgebildet ist, wenn sie in das Innere der Haube (20) eingesetzt ist, wobei sich der Vorsprung (30) in den strömungsweg des von dem Schleuderrad (21) beschleunigten Strahlmittels erstreckt und zu der offenen Seite der Haube hin gerichtet ist, so daß die Verschleißrate an der Stirnverschleißplatte (23) reduziert wird und Strahlmittel durch den Vorsprung oder den Damm (30) wieder in das Strahlmittelmuster gerichtet wird, um den Strahlmittelrückprall zu verhindern und dadurch die Strahlungseffizienz zu erhöhen.
14. Kombination einer Haube (20) zur Verwendung in einer Strahlputzmaschine und zur Unterbringung eines drehbaren Schleuderrades (21), um Strahlmittel durch eine offene Seite der Haube (20) in Richtung eines zu putzenden Werkstückes zentrifugal herauszuschleudern, und einer Auskleidung von Verschleißplatten (22, 23 und 24) nach einem der Ansprüche 1 bis 12, die innerhalb der Haube (20) eingepaßt sind.
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 EP0084430A1 (de) 1983-07-27
EP0084430B1 true 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)

Families Citing this family (5)

* 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
FR2524823A1 (fr) * 1982-04-09 1983-10-14 Kennecott Corp Element et ensemble de garnissage pour carter de protection d'une roue de projection, paroi superieure de fermeture de ce carter et procede de production d'un ensemble de garnissage comportant des elements interchangeables
EP3383586A1 (de) * 2015-12-02 2018-10-10 Wheelabrator Group Limited Federanordnung zur positionierung von auskleidungen in einer schleuderradstrahlmaschine
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
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160990A (en) * 1962-11-29 1964-12-15 Pangborn Corp Particle-throwing apparatus
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

Also Published As

Publication number Publication date
GB8300758D0 (en) 1983-02-16
EP0084430A1 (de) 1983-07-27
DE3364555D1 (en) 1986-08-28
GB2113127A (en) 1983-08-03
ATE20845T1 (de) 1986-08-15
GB2113127B (en) 1986-08-20

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