US3352064A - Lock system for blasting-machine blades - Google Patents

Lock system for blasting-machine blades Download PDF

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Publication number
US3352064A
US3352064A US429281A US42928165A US3352064A US 3352064 A US3352064 A US 3352064A US 429281 A US429281 A US 429281A US 42928165 A US42928165 A US 42928165A US 3352064 A US3352064 A US 3352064A
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US
United States
Prior art keywords
locking member
rotor
locking
blades
central portion
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 - Lifetime
Application number
US429281A
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English (en)
Inventor
Groot John E De
Fuerst Bernard
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.)
Wheelabrator Corp
Original Assignee
Wheelabrator Corp
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 Wheelabrator Corp filed Critical Wheelabrator Corp
Priority to US429281A priority Critical patent/US3352064A/en
Priority to DE19661577547 priority patent/DE1577547A1/de
Priority to DE19661777303 priority patent/DE1777303A1/de
Priority to GB4480/66A priority patent/GB1101107A/en
Priority to US652137A priority patent/US3513597A/en
Application granted granted Critical
Publication of US3352064A publication Critical patent/US3352064A/en
Priority to JP45047241A priority patent/JPS4943312B1/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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

  • ABSTRACT OF THE DISCLOSURE The invention is addressed to a centrifugal blasting wheel formed of a pair of axial-1y spaced wheel members joined one to another with radial grooves extending in parallel relationship along the inner faces of the wheel members for receipt of radially extending blade members over which particulate material is displaced during rapid rotational movement of the wheel.
  • the improvement resides in a means for releasably securing the blades in position of use in the wheel comprising radially spaced abutments the outermost of which is at a higher level than the innermost with a member mounted for rotational movement between the wheels having a central eccentric or cutout portion adapted to enable the innermost abutment to pass thereunder when in unlocking position and to block the innermost abutment from passage thereunder when in locking position to provide means for releasably securing the blade in position of use with the outermost abutment dimensioned to engage said locking device independent of its position to establish the inserted position for the blade.
  • a further important feature resides in a radially extending arm in tegral with the locking member centrifu'gally to urge the locking member in locking position responsive to rotational movement of the wheel thereby to prevent inadvertent release of the blade during operation of the wheel.
  • This invention relates to the construction of blasting machines, in which a rotating wheel is used to accelerate abrasive particles to produce a high-velocity stream directable along a selected path.
  • These machines are commonly used in foundries to clean scale from castings, and in rnany other industrial processes.
  • the usual construction of a rotor includes a pair of disc-shaped side plates separated by spacers, and this assembly is usually fastened to a hub structure mounted on a driven shaft. At least one of the plates is open in the central area, and abrasive particles are supplied via this opening to the space between the side plates. Blades supported by the plates engage these particles and accelerate them as the wheel rotates. The result is a tangential stream of high velocity abrasive particles, and erosion of the blades re suiting from this action necessitates frequent blade replacement. 7
  • the blades are commonly received along their edges in opposite grooves in the rotor side plates. These grooves are normally radial, and means must be provided for holding the blades against the effects of centrifugal force. In prior machines, this locking action has been provided by set screws in the side plates, or by a locking clip of the type shown in United States Patent No. 2,819,562. These prior locking arrangements have shownseveral undesirable characteristics, and the present invention has been developed to provide a blade lock that requires no tools, is not subject to variations in spring strength and dimensions, and is of such sturdy construction as to minimize the danger that stray particles of abrasive will wear enough of the locking device away to endanger the security of the locking action. These blades commonly weigh several pounds, and attain velocities of two hun- 3,352,064 Patented Nov. 14, 1967 dred feet per second or more. It is obviously vital that the blades be prevented from escaping from the rotor.
  • FIGURE 1 is an axial section through a rotor equipped with the present invention for locking the blades in position.
  • the rotor is of otherwise conventional construction.
  • FIGURE 2 is a fragmentary section on the plane 22 of FIGURE 1.
  • FIGURE 3 is a section on the plane 3--3 of FIGURE 1, on an enlarged scale.
  • FIGURE 4 is a section on the plane 44 of FIGURE 1, on a scale corresponding to that of FIGURE 3.
  • FIGURE 5 illustrates the release position of the locking device.
  • FIGURE 6 is a perspective exploded view showing the relationship of the side plate grooves, and the locking device.
  • FIGURE 7 is a perspective view of the front, or abrasive-receiving, side of the blade.
  • the rotor generally indicated at 10 includes the axially-spaced side plates 11 and 12 maintained in parallel spaced relationship by the spacer posts 13-15 shown in FIGURE 2. These are uniformly disposed anound the rotor.
  • This side plate assembly is secured to the hub structure 16 mounted on the driven shaft 17 in a suitable maohine frame (not shown).
  • the side plate 12 has a central opening substantially occupied by the cage assembly indicated generally at 18.
  • the chute 19 delivers a continuous supply of abrasive particles during the operation of the machine, and the functioning of the cage structure is to admit these particles at a selected sector so that the emerging tangential stream of highvelocity particles will be located as desired to follow a predetermined path.
  • the cage structure 18 is fixed in position, and the distributing member 20 is secured to the rotor.
  • the delivery of the particles through the chute 19 to the interior of the distributing member 20 will cause the particles to move around with the rotor until they emerge from the opening 21 in the cage 18 which is appropriately located to produce the desired tangential path of the abrasive parti clesemer-ging from the machine.
  • the particles move radially outward through the opening 21, they being to encounter the blades shown at 22-25, these blades (to- ⁇ gether with others) being uniformly spaced about the rotor, and arranged in radial planes containing the axis of rotation of the rotor.
  • the structure thus far described is conventional.
  • the erosive effect of the stream of high velocity abrasive particles requires frequent replacement of the blades, and somewhat less frequent replacement of the side assembly.
  • the securing of the side plate assembly to the hub structure 1-6 by the bolts shown at 26 and 27 in FIGURE 1 makes the replacement of the side-plate assembly a fairly simple matter.
  • the replacement of the blades necessitates disengagement of a locking system which must be incorporated to prevent centrifugal force from moving the blades outwardly in the retaining slots commonly provided on the inner surfaces of the side plates 11 and 12.
  • the edges 28 and 29 of the blades are received in opposite grooves as shown at 30 and 31 in the adjacent surfaces of the side plates 11 and 12.
  • the front face of the blade is indicated at 32, which is the face primarily receiving the stream of abrasive particles. This face corresponds to the advance surface of the blade with respect to the direction of rotation.
  • the back surface of the blade indicated at 33 is provided with axiallyspaced pairs of abutments 34-35 and 36-37.
  • the abutments constituting the pairs are radially spaced sufiiciently to admit between them the central portion 38 of the locking member 39.
  • the ends 40 and 41 of the locking member 39 are engageable with opposite recesses as Shown at 42 in FIGURE 6, and these recesses intersect the retaining grooves receiving the edges of the blades.
  • the central portion 38 is eccentric with respect to the ends 40 and 41, with the result that the locking member 39 is rotatable between a locking position shown in FIGURE 4 and a release position shown in FIGURE In FIGURE 4, the presence of the central portion 38 between the abutments prevents either outward or inward movement of the blades, while the release position of FIGURE 5 will permit the blade to be withdrawn to the left so that the abutments 35 and 37 can move underneath the central portion 38 of the locking member. In the release position, it is very convenient to have the abutments 34 and 36 sufficiently high so that they will function as a stop limiting the inward movement of the blades on insertion from the outer periphery of the rotor.
  • the arm 43 is secured to the locking member 39 in a position such that the effect of centrifugal force will normally maintain the locking member in the FIGURE 4 position.
  • the arm 43 is swung from the radially outward position of FIGURE -4 to the inward position of FIGURE 5.
  • the arm 43 is returned to the FIGURE 4 position after the new blade has been inserted.
  • the compression springs 44 are installed in the axial holes 45 in the ends of one side of the locking members. The strength of these springs is selected to produce a frictional effect which will exceed the tendency of gravity to rotate the locking member at any position around its rotary path of movement.
  • the radially outer abutments 34 and 36 are not necessary to the functioning of the invention, as other structure maybe relied upon to establish the stop to the inward movement of the blades on insertion.
  • the radially inner abutments might be disposed to contact the spacers 1315, or some auxiliary stop structure can be incorporated.
  • a pair of inner abutments as shown at 35-37 be used. As far as the function is concerned, one of these would be adequate. It is preferable, however, that forces be balanced by the structure as shown.
  • the locking member be provided with cylindrical or cam-shaped bearing portions as shown at 46 and 47 which bear on the blade to control the degree of looseness of the blades in the grooves.
  • the conformation of the locking member is determined so that it may be inserted and removed (in the :absence of the blade associated with it) without dis- :assemblyof the side plate structure of the machine.
  • the extent of the recesses 42 to the side of the grooves 31 fis related to the length of the locking member between its opposite ends such that placement of the locking member in a diagonal position (inclined with respect to a perpendicular to the side plates) will permit the withdrawal of the locking member, with the assistance of the clearance provided by the slots 31. It will normally be necessary to shove the locking member 39 so as to compress the spring 44 in order to accomplish this insertion or removal, but this presents no problem.
  • the replacement of the locking members is a very infrequent operation, and the compression of the spring 44 can be accomplished through the insertion of a screw driver under the opposite end of the locking member, normally applied through the space provided by the adjacent blade groove.
  • a locking system for disengageably retaining the said blades in the said grooves, comprising:
  • a locking member having the ends thereof normally rotatably received in the said recesses, and having a central portion normally disposed radially outward from said abutment, said central portion being eccentric with respect to the ends of said locking member whereby said locking member is rotatable between a position wherein said abutment is free to pass underneath said central portion, and a locking position wherein said abutment is engageable with said central portion which includes a radially extending elongate arm integral with the locking member between the side plates automatically to urge the locking member to locking position by centrifugal force effected in response to rotation movement of the rotor and which operates the locking member for rotational movement toward and away from locking position.
  • a locking system for disengageably retaining the said blades in the said grooves, comprising:
  • a locking member having the ends thereof normally rotatably received in the said recesses, and having a central portion normally disposed between said abutments, said central portion being eccentric with respect to the ends of said locking member whereby said locking member is rotatable between a position wherein the radially innermost of said abutments is free to pass underneath said central portion while the outer abutment is incapable of passage therebeneath, and a locking position wherein said innermost abutments is engageable with said central portion.
  • a locking system for disengageably retaining the said blades in the said grooves, comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Threshing Machine Elements (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
US429281A 1965-02-01 1965-02-01 Lock system for blasting-machine blades Expired - Lifetime US3352064A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US429281A US3352064A (en) 1965-02-01 1965-02-01 Lock system for blasting-machine blades
DE19661577547 DE1577547A1 (de) 1965-02-01 1966-02-01 Verriegelungssystem fuer Schaufelplatten von Sandstrahlgeblaesen
DE19661777303 DE1777303A1 (de) 1965-02-01 1966-02-01 Rotorschaufel
GB4480/66A GB1101107A (en) 1965-02-01 1966-02-01 Locking system for blades of blasting machines
US652137A US3513597A (en) 1965-02-01 1967-07-10 Locking blade for centrifugal blasting wheel
JP45047241A JPS4943312B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-02-01 1970-06-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US429281A US3352064A (en) 1965-02-01 1965-02-01 Lock system for blasting-machine blades

Publications (1)

Publication Number Publication Date
US3352064A true US3352064A (en) 1967-11-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
US429281A Expired - Lifetime US3352064A (en) 1965-02-01 1965-02-01 Lock system for blasting-machine blades

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US (1) US3352064A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4943312B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE1577547A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1101107A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436867A (en) * 1966-09-09 1969-04-08 Benfur Eng Co Blasting machine blade formation for producing a divergent stream of abrasive
US3513597A (en) * 1965-02-01 1970-05-26 Wheelabrator Corp Locking blade for centrifugal blasting wheel
DE2356226A1 (de) * 1973-11-10 1975-05-15 Berger Maschf Gmbh Befestigung von wurfschaufeln oder schlaegern an rotoren von strahl- bzw. zerkleinerungsvorrichtungen
US4227351A (en) * 1978-04-17 1980-10-14 Firma Maschinen Und Werkzeugfabrik Kabel Vogel & Schemmann Centrifugal wheel assembly for spraying apparatus
US4249350A (en) * 1979-01-15 1981-02-10 Goff James R Abrasive throwing wheel and improved blade assembly
US4277965A (en) * 1977-11-24 1981-07-14 Cockerill Centrifugal shotting turbine
USD270642S (en) 1981-02-03 1983-09-20 Watts W David Abrasive blasting wheel pin
US6447378B1 (en) 2000-03-08 2002-09-10 Disa Goff, Inc. Abrasive throwing wheel and abrasive throwing blade
US20040166777A1 (en) * 2000-10-02 2004-08-26 Goff James R. Abrasive throwing wheel and improved blade assembly
US8043141B1 (en) * 2009-01-21 2011-10-25 Goff James R Throwing wheel assembly
US10384327B2 (en) * 2014-09-25 2019-08-20 Wheelabrator Group Limited Blade for centrifugal blast wheel machine and method of maintaining a centrifugal blast wheel machine
US20210069862A1 (en) * 2019-09-11 2021-03-11 Air-Bag Packing Co., Ltd. Impeller structure and projection equipment
US11826882B1 (en) * 2022-12-27 2023-11-28 Paul Enegren Blast wheel and quick-connect blade assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2049466A (en) * 1935-07-05 1936-08-04 Minich Verne Elwood Abrasive throwing wheel
GB604484A (en) * 1945-11-26 1948-07-05 Tilghman S Patent Sand Blast C Improvements relating to centrifugal sand blasting machines
DE834340C (de) * 1945-04-25 1952-03-17 Fischer Ag Georg Schleuderrad zum Schleudern von Schleudergut
US2819562A (en) * 1956-05-07 1958-01-14 Wheelabrator Corp Centrifugal blasting wheel and blades for use in same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2049466A (en) * 1935-07-05 1936-08-04 Minich Verne Elwood Abrasive throwing wheel
DE834340C (de) * 1945-04-25 1952-03-17 Fischer Ag Georg Schleuderrad zum Schleudern von Schleudergut
GB604484A (en) * 1945-11-26 1948-07-05 Tilghman S Patent Sand Blast C Improvements relating to centrifugal sand blasting machines
US2819562A (en) * 1956-05-07 1958-01-14 Wheelabrator Corp Centrifugal blasting wheel and blades for use in same

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513597A (en) * 1965-02-01 1970-05-26 Wheelabrator Corp Locking blade for centrifugal blasting wheel
US3436867A (en) * 1966-09-09 1969-04-08 Benfur Eng Co Blasting machine blade formation for producing a divergent stream of abrasive
DE2356226A1 (de) * 1973-11-10 1975-05-15 Berger Maschf Gmbh Befestigung von wurfschaufeln oder schlaegern an rotoren von strahl- bzw. zerkleinerungsvorrichtungen
US4277965A (en) * 1977-11-24 1981-07-14 Cockerill Centrifugal shotting turbine
US4227351A (en) * 1978-04-17 1980-10-14 Firma Maschinen Und Werkzeugfabrik Kabel Vogel & Schemmann Centrifugal wheel assembly for spraying apparatus
US4249350A (en) * 1979-01-15 1981-02-10 Goff James R Abrasive throwing wheel and improved blade assembly
USD270642S (en) 1981-02-03 1983-09-20 Watts W David Abrasive blasting wheel pin
US6447378B1 (en) 2000-03-08 2002-09-10 Disa Goff, Inc. Abrasive throwing wheel and abrasive throwing blade
US20040166777A1 (en) * 2000-10-02 2004-08-26 Goff James R. Abrasive throwing wheel and improved blade assembly
US7311584B2 (en) * 2000-10-02 2007-12-25 Pangborn Corporation Abrasive throwing wheel and improved blade assembly
US8043141B1 (en) * 2009-01-21 2011-10-25 Goff James R Throwing wheel assembly
US10384327B2 (en) * 2014-09-25 2019-08-20 Wheelabrator Group Limited Blade for centrifugal blast wheel machine and method of maintaining a centrifugal blast wheel machine
US20210069862A1 (en) * 2019-09-11 2021-03-11 Air-Bag Packing Co., Ltd. Impeller structure and projection equipment
US11826882B1 (en) * 2022-12-27 2023-11-28 Paul Enegren Blast wheel and quick-connect blade assembly

Also Published As

Publication number Publication date
DE1777303A1 (de) 1971-07-15
GB1101107A (en) 1968-01-31
DE1577547A1 (de) 1970-03-26
JPS4943312B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-11-20

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