EP0029346A1 - Schleuderräder für eine Strahlputzvorrichtung - Google Patents

Schleuderräder für eine Strahlputzvorrichtung Download PDF

Info

Publication number
EP0029346A1
EP0029346A1 EP19800304063 EP80304063A EP0029346A1 EP 0029346 A1 EP0029346 A1 EP 0029346A1 EP 19800304063 EP19800304063 EP 19800304063 EP 80304063 A EP80304063 A EP 80304063A EP 0029346 A1 EP0029346 A1 EP 0029346A1
Authority
EP
European Patent Office
Prior art keywords
slots
blade
blade member
side edge
cross
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.)
Ceased
Application number
EP19800304063
Other languages
English (en)
French (fr)
Inventor
Dan c/o Auto Alloys R & D Limited Taylor
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.)
Auto Alloys R&D Ltd
Original Assignee
Auto Alloys R&D 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 Auto Alloys R&D Ltd filed Critical Auto Alloys R&D Ltd
Publication of EP0029346A1 publication Critical patent/EP0029346A1/de
Ceased legal-status Critical Current

Links

Images

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 is concerned with improvements in or relating to rotary impeller wheels for blast cleaning apparatus and the components of such wheels.
  • a rotary impeller wheel is located within a housing.
  • Metallic abrasive or other cleaning material is fed to the centre of the wheel in an axial direction and discharged radially under centrifugal action as the wheel rotates.
  • a control member or control cage is located around the central hub of the wheel and has a peripheral opening through which the cleaning material is discharged. The control cage is rotatable relative to the wheel hub in order to alter the direction of discharge of the cleaning material.
  • the rotary impeller wheel includes radially extending blades which are subject to considerable wear and thus require frequent replacement. It is convenient to be able to replace the blades by removing the control cage, removing the worn blades through the central aperture and inserting replacement blades through the aperture, as this does not therefore require dismantling of any of the components of the housing.
  • a blade mounting plate for a rotary impeller wheel comprising a centrally located through aperture and, in one side face of the plate and opening on to said one side face, a plurality of radially extending slots, each of which opens at one end into the aperture, and has such a cross section that the side face opening has a lateral dimension less than a corresponding internal dimension, whereby a blade suhstgantial ly having a cross section complementary to that of the slots can be retained in a respective slot when one side edge of the blade is entered from the central aperture through the open end of the slot.
  • each slot terminates short of the radially outermost edge of the plates.
  • weans are provided for biasing the blade in a direction parallel to the axis of the plate into intimate engogement with internal walls of the slot.
  • the biasing mans may comprise a recess formed in the base of each slot for receiving a biasing spring.
  • the slots may be arranged in diametrically opposed pairs on said one side face of the plate.
  • the slots may be arranged such that each is diametrically opposed to a location intermediate another pair of slots.
  • the slots extend over an area which way be of substantially truncated conical cross section, terminating in a raised edge at the central aperture.
  • a rotary impeller wheel comprising a blade mounting plate as described in any of the five preceding paragraphs, and at least one blade, one side edge of which has a cross section complementary to that of the slots.
  • an airless blast cleaning apparatus i.e. an apparatus wherein the abrasive cleaning medium is thrown by mechanical means, eliminating the need for compressed air, includes a rotary impeller wheel 10 mounted on the end of a rotatable shaft 12 by means of a hub assembly 14.
  • the wheel 10 includes a central impeller 16 of cage-like construction and a series of radially extending blades 18 secured on a blade mounting side plate 20 as hereinafter described.
  • a control cage 22 surrounds the impeller 16 and is angularly odjustably mounted on an external housing 24 enclosing the wheel 10.
  • the control cage 22 is provided with a peripheral opening the position of which relative to the impeller wheel 16 determines the direction of which the abrasive cleaning medium is directed out of the apparatus during operation.
  • the abrasive medium is introduced into the impeller wheel 10 by means of a feed chute assembly 26 mounted on a supporting bracket 28.
  • the side plate 20 (Figs. 2 and 3) is of circular configuration having a centrally located through aperture 30.
  • Each slot 34 opens at its top on to the face 32 and also opens at a radially inner ond on to the central aperture 30.
  • the cross section of each slot 34 is substantially of dovetail shape such that side walls 36 extend in converging paths from a base 38 of the slot with the width of the base 38 being greater than the width of the open top.
  • Each slot 34 terminates at its radially outermost end short of the peripheral edge of the plate 20 and is provided in its base 38 with a substantially rectangular recess 40 for receiving a compression spring (not shown) for a purpose hereinafter described.
  • the plate 20 On the opposed face 42 the plate 20 is formed as a circular recess 44 for receiving a respective part of the hub assembly 14, the plate 20 being secured to the hub assembly 14 by means of screws 46 (Fig. 1) extending through the hub assembly 14 into fixing holes 48 on the plcates 20.
  • Each of the blades 18 (Figs. 4 and 5) is of substantially rectangular shape formed of a wear resistant material, and has its opposed side faces identical. At one side edge, each of the blades 18 has a mounting lug 50 extending along the length of the blade 18 over a distance corresponding to the length of the slots 34.
  • the lug 50 has a cross section complementary to that of the slots 34 such that the lug 50 can enter a respective one of the slots 34 from the in aperture 30/to the open end of the slot 34, and be held against removal from the slot 34 in a direction parallel to the axis of the plate 20.
  • a spring is located in the recess 40 of the slot 34, the blade 18 is biased into intimate contact with the inner faces of the walls 36 of the slot 34 to be frictionally retained against movement out of the slot 34 in a radial direction.
  • the blade 18 As the blade 18 is longer than the lug 50, the blade 18 overlies a peripheral rim of the plate 20 when the lug 50 is moved wholly within the slot 34.
  • the blade 18 at said one side edge is provided with a laterally extending lip 52 on each face, each lip 52 being angled from the radially innermost end of the blade 18 to terminate in a maximum height at the radially outermost end of the blade 18.
  • the lips 52 enable a radiused surface to be formed at each face of the blade 18 for increased wear resistance at the junction between the blade 18 and the plate 20.
  • the other side edge of the blade 18 has a cross section defining laterally extending lips 54 to assist in the directing of the abrasive medium.
  • This embodiment is suitable for impeller wheels of diameters up to 15 inches where the length of the blades is less than the diameter of the central aperture, such that, with the control cage removed, worn blades can be removed and replacement blades provided by sliding of the blades in the slots via the central aperture.
  • the length of the blade is greater than the diameter of the central aperture and therefore such removal and replacement of blades is not possible.
  • the second embodiment as shown in Figs. 6 to 9 is provided to achieve this possibility.
  • the blade mounting plate 20 is of circular configuration having a central through aperture 60.
  • One face 62 of the plate 20 i.e. that face on which the blades 18 are mounted, is provided with a plurality of radially extending slots 64 which are of identical configuration to the slot 34 of the first embodiment but of different dimensions, resulting from the different sizes of wheel being used.
  • Each slot 64 is arranged to be diametrically opposed to a location intermediate of two other adjacent slots 64 for a purpose hereinafter described.
  • the plate 20 has a cross section which, in an area 65 over which the slots 64 extend, is of truncated conical section terminating in an edge of the aperture 60 raised above the peripheral rim. As in the first embodiment the slots 64 terminate at their radially outermost ends short of the peripheral edge of the plate.
  • Each of the blades 18' (Figs. 8 and 9), provided for the second embodiment, is of substantially rectangular configuration having its opposed faces identical.
  • One side edge, i.e, that edge to be mounted on the plate 20 - is provided with a mounting lug 70 which is complementary in cross section to the slots 64 and which extends at an angle relative to the side edge or the blade 18 corresponding to the cone angle of the area 65 of the face 62.
  • That end of the lug 70 which is radially outermost in use is provided with a flat 72 extending parallel to the edge of the blade 18 for a purpose hereinafter described.
  • a lip 74 is provided on each face of the blade 18 at said one edge to extend from a location along the lug 70 to the end of the blade 18 which overlies the peripheral rim of the plate 20 in use.
  • the lips 74 enable radiused surfaces to be provided at the connection of the blades 18 and the plate 20 .
  • the other side edge of the blade 18 is of similar configuration to the corresponding side edge of the blade 18 of the first embodiment.
  • the raised edge of the aperture 60 and the corresponding angles of the slot 64 and the lug 70 enable the respective end of the lug 70 to enter the slot 64 while the other end of the lug 70 remains clear of the edge of the aperture 60 at the diametrically opposed location.
  • the flat 72 facilitates the entry of the lug 70 into the slot 64.
  • the plate 20 also has a circular recess in its other side face and mounting holes for attachment of the plate to the hub assembly. Again these features are similar to those of the firrt embodiment and like numerals therefore refer to like parts.
  • An arrangement according to the invention is advantageous in that a single sided impeller wheel is easier and cheaper to manufacture than the conventional double sidec wheels. Also the rotating mass is reduced and therefore less power is required at start-up of the machine. Further renewal and replacement of blades is possible for impeller wheels of any diameter and this is particularly advantageous in that dismantling of housings or hoods for the impeller wheels is not required when replacement of the blades becomes necessary.
  • the blades are conveniently retained in their slots against both axial and radial movement in use and the impeller wheels can be adopted to fit any existing blast cleaning machine with a suitable arrangement of mounting holes. It is envisaged that different arrangements of mounting holes are provided on each blade mounting plate for this purpose.
  • the components are made of a wear resistant material where appropriate and all connecting edges are rounded off where possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP19800304063 1979-11-13 1980-11-13 Schleuderräder für eine Strahlputzvorrichtung Ceased EP0029346A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7939172 1979-11-13
GB7939172A GB2063116B (en) 1979-11-13 1979-11-13 Rotary impeller wheel for blast cleaning apparatus

Publications (1)

Publication Number Publication Date
EP0029346A1 true EP0029346A1 (de) 1981-05-27

Family

ID=10509148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800304063 Ceased EP0029346A1 (de) 1979-11-13 1980-11-13 Schleuderräder für eine Strahlputzvorrichtung

Country Status (2)

Country Link
EP (1) EP0029346A1 (de)
GB (1) GB2063116B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291293A3 (de) * 1987-05-12 1990-09-26 Pangborn Corporation Oberflächenreiniger
RU2254224C2 (ru) * 2002-02-20 2005-06-20 Федеральное государственное унитарное предприятие "Производственное объединение "Северное машиностроительное предприятие" Рабочее колесо турбины для машин, работающих дробью

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9211408D0 (en) * 1992-05-29 1992-07-15 Luttrell Peter B Rotors for throwing particles centrifugally therefrom

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108211A (en) * 1934-05-17 1938-02-15 Pangborn Corp Abrading machine
US2246522A (en) * 1938-03-10 1941-06-24 Pangborn Corp Abrading apparatus
US2341559A (en) * 1941-09-05 1944-02-15 Pangborn Corp Abrading apparatus
US2590576A (en) * 1934-05-17 1952-03-25 Pangborn Corp Abrading apparatus
US2869289A (en) * 1957-01-24 1959-01-20 Pangborn Corp Reversible centrifugal blasting method and apparatus
US3160992A (en) * 1963-07-10 1964-12-15 Pangborn Corp Abrasive blasting wheel
US3197920A (en) * 1962-05-18 1965-08-03 Pangborn Corp Throwing wheel and parts therefor
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108211A (en) * 1934-05-17 1938-02-15 Pangborn Corp Abrading machine
US2590576A (en) * 1934-05-17 1952-03-25 Pangborn Corp Abrading apparatus
US2246522A (en) * 1938-03-10 1941-06-24 Pangborn Corp Abrading apparatus
US2341559A (en) * 1941-09-05 1944-02-15 Pangborn Corp Abrading apparatus
US2869289A (en) * 1957-01-24 1959-01-20 Pangborn Corp Reversible centrifugal blasting method and apparatus
US3197920A (en) * 1962-05-18 1965-08-03 Pangborn Corp Throwing wheel and parts therefor
US3160992A (en) * 1963-07-10 1964-12-15 Pangborn Corp Abrasive blasting wheel
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291293A3 (de) * 1987-05-12 1990-09-26 Pangborn Corporation Oberflächenreiniger
RU2254224C2 (ru) * 2002-02-20 2005-06-20 Федеральное государственное унитарное предприятие "Производственное объединение "Северное машиностроительное предприятие" Рабочее колесо турбины для машин, работающих дробью

Also Published As

Publication number Publication date
GB2063116B (en) 1983-03-09
GB2063116A (en) 1981-06-03

Similar Documents

Publication Publication Date Title
EP0026996B1 (de) Schleuderrad zum Schleudern von Schleudergut
US4825627A (en) Lawn mower cutting assembly
US3796511A (en) Blower
US4751798A (en) Shot blasting apparatus
CA1213143A (en) Abrasive cleaning apparatus
EP0372701B1 (de) Strassenkehrvorrichtungen
US3768209A (en) Impelling wheel for particulate material
US4021899A (en) Tire buffing machine blades having heat dissipation means
US4406065A (en) Cutting head for a free-cutting device
US5688162A (en) Blast wheels and cages for blast wheels
EA014976B1 (ru) Изнашиваемый элемент ударной дробилки с вертикальным валом и способ уменьшения износа ротора такой дробилки
US3443369A (en) Mowing machine
US2322306A (en) Ice shaver and blower
EP0029346A1 (de) Schleuderräder für eine Strahlputzvorrichtung
US4941297A (en) Flared vane for abrasive blasting wheel
EP1694465B1 (de) Steuerkäfig für schleuderstrahlrad
US4176502A (en) Spacerless blasting wheel and blade locking arrangement therefor
US6311463B1 (en) Rotary mower cutter disc having self-cleaning knife mount shield
US2625332A (en) Rejector blade for rotary pulverizers
US5584748A (en) Blast wheel having a rotatable shaft with radial discs and blades dovetailed across the discs
US4203263A (en) Slinging wheel for centrifugal jet machines
CA1242586A (en) Flared vane for abrasive blasting wheel
EP1151797A1 (de) Rotierende Schneidemaschine für Granulatmaterial
JPS58181573A (ja) 遠心投射機のインペラ−装置
US11273568B2 (en) Impeller, centrifugal cutting apparatus comprising same, and method of operating same

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR NL SE

17P Request for examination filed

Effective date: 19811229

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19840410

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TAYLOR, DANC/O AUTO ALLOYS R & D LIMITED