US3258211A - Crusher apparatus - Google Patents

Description

June 28, 1966 G. w. BEHNKE 3,258,211

CRUSHER APPARATUS Filed Jan. 24, 1964 2 Sheets-Sheet l INVENTOR.

ATTORNEYS J1me 1966 G. w. BEHNKE 3,253,211

CRUSHER APPARATUS Filed Jan. 24, 1964 2 Sheets-Sheet 2 47 d INVENTOR.

33 earge ZZBeA/Me HTTORNEYS United States Patent "ice 3,258,211 CRUSHER APPARATUS George W. Behnke, Durand, Mich, assignor to Simplicity Engineering Company, Durand, Mich, a corporation of Michigan Filed Jan. 24, 1964, Ser. No. 339,947 8 Claims. (Cl. 241275) This invention relates to crushing apparatus of the impact type for crushing various materials and is a continuation-in-part of presently .pending application for Crusher Apparatus, filed December 26, 1961, Serial No. 162,075, now Patent No. 3,170,645, Messrs. Behnke, Westcott and Wirth, inventors.

One of prime objects of the invention is to design a crushing apparatus for crushing lightweight aggregates such as asbestos, shale, gravel, stone, coal, coke, limestone, and other materials of either wet or dry classification providing high production and producing optimum volume of finished products at minimum cost.

Inasmuch as the material to be processed is of a highly abrasive nature, it is essential that all wear parts of the apparatus be protected as much as possible; that they be adjustable to compensate for wear and reversible to present fresh working surfaces, all to the end that the apparatus will continue to operate at high capacity With finished product unaffected by heavy wear of working surfaces.

One of the prime objects of the invention is to design a crushing apparatus including a crushing bowl having a plurality of impact bars adjustably mounted therein, and provide means for reinforcing and holding the impact bars solidly in set position, so that the material flung outwardly against the bars will be uniformly shattered, and in which the volume of fines can be accurately controlled by merely changing the speed of the impeller assembly to control the speed of travel of the material flung from the impeller. Another object of the invention is to design a crushing apparatus including an impeller provided with circumferentially spaced apart buckets and provide a plurality of wear pins and members adjacent to and connected with said buckets for protecting them from excessive wear caused by pieces of the material flung by the impeller ricocheting from the impact bars back against the back wall of the buckets, causing heavy wear and frequent re placement at high cost, and considerable down time for the apparatus.

A further object is to provide a crushing apparatus including a driven impeller and impact bars against which the material is flung, and provide easily accessible means for adjusting said impact bars, together with means for preventing escape of dust from the bowl when the apparatus is in operation.

Still a further object is to provide a modified impeller construction which mimizes wear and presents a minimum of individual pieces and projections exposed to the action of the material.

A further object still is to design a crushing apparatus which crushes and fiberizes asbestos, retaining longer fibers and producing less fines at lower cost and with less maintenance and down time.

With the above and other objects in view, the present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims; it being understood that changes may be made in the form, size, proportion and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

In the drawings:

FIGURE 1 is a vertical, sectional view through our crushing apparatus.

Patented June 28, 1966 FIGURE 2 is a top plan view thereof, with the cover broken away to more clearly show the construction.

FIGURE 3 is an enlarged plan view of the impeller, parts being broken away to show the wear pins and plates.

FIGURE 4 is a sectional, edge elevational view of the impeller.

FIGURE 5 is a perspective view of one of the Wear plate sections.

Referring now more specifically to the drawings wherein like parts are designated by the same numerals throughout the various views.

The crushing apparatus comprises a cylindrical bowl or shell S mounted on elongated supports 10 on which a motor M is adjustably mounted for driving an impeller 11 mounted on a vertical shaft 12 which is journaled in a bearing 14 provided on said supports by means of a drive belt 15 or the like. The upper end of the bowl is open and a cover 16 forms a closure therefor, said cover having a centrally disposed opening 17 which accommodates the spout 18 of the material hopper 19 from which the material to be crushed flows to the impeller, and the lower end of the bowl is also open as usual to permit discharge of the crushed materials passing through the apparatus.

The lower end section 20 of the crushing bowl is of smaller diameter than the upper, and extends a predetermined distance thereinto as shown in FIGURE 1 of the drawings and passages 21 are provided in the lower end of section 20 to accommodate the supports 10 which ex tend therethrough. The upper enlarged bowl section 22 contains the crushing section of the apparatus, and the impeller 11 is mounted therein, said impeller comprising vertically spaced apart upper and lower flat end sections 23 and 24, respectively, the section 24 having a centrally disposed opening 25 in which a hub member 26 is welded as shown. A wear plate 27 is disposed in facial contact with the plate 24 and is also welded to the hub 26 and to plate 24 respectively.

Cast abrasive resistance plate sections 28 are bolted to the upper face of plate 24, and are formed with a rim section 29 to protect the peripheral edge of the plate 24, said wear plate sections being shaped as clearly shown in FIGURE 5 of the drawings, and bolts 30 are provided to secure the plate sections 28 in position.

A center cap 31 is mounted on the upper end of drive shaft 12 by means of bolts 32 and overlies the openings 28a provided in plates 28, and the shaft 12 is further keyed to the hub as at 33 to provide a secure connection thereat.

The upper end of the impeller is of substantially the same construction as the lower, the cast sections 34 being formed of an abrasive resistance material and are formed with a rim section 35 grooved as at 36 to accommodate and protect the rim of the plate 23. Bosses 37 are welded to the upper face of plate 23 in spaced relation, and bolts 38 are also provided for securing the sections 34 in position, said bosses being bored as at 39 to accommodate the nut 40.

These cast abrasive resistant wear plates 34 are subject to intensive wear and are so mounted that they can be quickly removed and replaced when necessary. A centrally disposed opening 41 is provided in the upper section 23 to accommodate the spout 18 of the material hopper 19, and a plurality of circumferentially spaced apart buckets B form a part of the impeller assembly, each bucket comprising a vertically disposed section 42 preferably substantially triangular in cross section, with the upper end lower edges welded to the upper and lower plates 23 and 24 of the impeller, and hardened wear pins 43 and 44 are mounted in suitable openings 45 provided in the plates 23 and 24, said pins being turned as at 46 and are located at the outer and inner end of the bucket section to form the tip and rear end of the bucket, the

lower plate 27 having properly located openings 47 to accommodate the turned end section 46 of the pins.

T o shield and prevent excessive wear on the impeller parts and buckets B due to materials ricocheting from the impact bars X, I provide spaced apart wear pins 48 positioned as shown, which pins are also shouldered the same as pins 43 and 44 to fit suitable openings (not shown) provided in the impeller and wear plates, respectively, and an abrasive resistant plate 50 is provided on the back face of the bucket to reinforce and shield same.

The impeller wear pin locking means comprises a plate 51 having slotted openings 52 therein which accommodate bolts 53, said plate being so shaped that when in locked position, it overlaps a section of the ends of the wear pins, and when the bolts 53 are loosened, the plate 51 can be shifted to clear the individual pins to permit easy and quick removal thereof.

A plurality of impact bar accommodating openings 54 are provided in the side wall of the enlarged section of the bowl, and a radially extending housing 56 forms an extension as shown, the impact bars X being accommodated in said housings and bear on upper edge of the vertical bowl skirt 20 and the lower wail of the openings 54, and a cover 57 forms a closure for the open end of each housing with bolts 58 to facilitate easy removal.

The stream of material flung by the impeller buckets is highly abrasive, and to provide a solid mounting for each impact bar and still permit ready adjustment, I provide a vertically disposed flat back-up plate 59 mounted in the shell, said plate projecting inwardly at an angle towards the impeller with its outer edge welded to the bowl Wall as shown. A horizontally disposed brace bar 60 spans the back-up plates a and is Welded to the upper edges thereof. Another brace 61 is welded to the vertical backup plate 59 and to the wall of the bowl to provide a rigid mounting and arrangement for the impact bars. A threaded locking bolt 62 is provided on each brace bar 60 and is adjustable against the upper face of the impact bar X to lock it in set position, and by backing off the bolt 62, the bars can then be adjusted as desired, after which the bolt 62 is tightened to rigidly lock the bar in position. Each impact bar is secured in exactly the same manner and any one or more bars can be readily adjusted, removed, and/or replaced, as desired. The impact bars X are also reversible end-for-end and side-forside to provide maximum wearing surface prior to the necessity of inserting new bars.

T o adjust or remove one of the impact bars, it is merely necessary to loosen the bolts 58, remove the end cover 57 which forms a closure for the housing, and then adjust or remove and replace the impact bar X as desired, after which the bolt 62 is again tightened, the cover plate 57 is then applied, and the adjustment or replacement is complete.

The wear pins 43, 44, and 48 can likewise be readily adjusted to present a new wearing surface by merely rotating to present a fresh working area, or they can be readily removed for replacement with a new pin when necessary. To adjust or remove, the operator merely removes the wedge pins 63 from the eyes 64 on the cover 16, this permits the hand hold cover 65 to be removed, the impeller is then rotated to bring it directly beneath the hand hold opening 66, after which the bolts 53 are loosened to permit adjustment of the locking plate 51 so that the Wear pins can be either adjusted, or removed and replaced, the locking plate 51 is then moved back to locked position, bolts 53 are again tightened, and the apparatus is now ready for operation.

In apparatus of the instant nature where highly abrasive material is treated to provide a product of the desired size, etc., it is extremely important that the parts subjected to intense wear be readily adjustable and/or readily replaceable with a minimum of labor and in a relatively short period of time, and also that the apparatus be constructed to eliminate excessive dust due to the crushing operation, and this I have accomplished in the instant construction.

Under normal crushing operations the complete impeller is subjected to intense wear due to frictional contact of the material being received and flung therefrom and further due to the material ricocheting from the impact bars X against the end wall and back face surface of the buckets B. I, therefore, secure abrasive wear plates 50 in position shown to protect the back section of the buckets, and the pins 48 are so located as to protect the angularly disposed outer end face of said buckets.

From the foregoing description, it will obvious that I have perfected a very simple, practical and relatively inexpensive crushing apparatus for crushing materials of all kinds.

I claim:

1. A central crusher comprising; bowl mean-'s; rotatable impeller means rotatably mounted within the bowl means; means for driving said impeller means; housing means extending outwardly from said bowl means; generally radially extending impact members in said bowl in circ-umferentially spaced relation around said impeller means; said bowl means having openings through which said impact members extend into said housing means; said housing means having circumferentially spaced openings through which said impact members may be withdrawn; removable cover means for said latter openings; and means for releasably securing said impact members in position.

2. A centrifugal crusher comprising; bowl means; rotatable impeller means rotatably mounted within the bowl means; means for driving said impeller means, circumferentially spaced housing members extending outwardly from said bowl means and having openings in the outer face thereof; radially extending impact bars in said bowl in circumferentially spaced relation around said impeller means; back-up plates in said bowl; said bowl means having openings through which said impact bars extend into said housing members and through which said impact bars can be withdrawn; removable covers for said openings in the housing members, and means for releasably securing said impact members in position.

3. The combination defined in claim 2 in which means is provided for mounting said impact bars in various radial positions, and individual bars connecting the inner end of one back-up plate with the adjacent back-up plate.

4. A centrifugal crusher comprising; a bowl; shaft means therein; means for driving said shaft means in a direction of rotation; rotatable impeller means within the bowl and driven by said shaft means; spaced apart buckets opening in the direction of rotation of said shaft means mounted on said propeller means; said buckets being formed with generally axially parallel replaceable wear members; a radially disposed member axially adjacent the buckets to close the sides thereof; said radially disposed member having openings configured to permit removal of said wear members theret-hrough, and liner plate means releasably secured on the side of said radially disposed member adjacent the buckets and having openings in alignment with the openings in said radially disposed member to pass said Wear members.

5. A centrifugal crusher comprising: a bowl; shaft means therein; means for driving said shaft means in a direction of rotation; rotatable impeller means within said bowl and driven by said shaft means; spaced apart buckets opening in the direction of ratation of said shaft means mounted on said impeller means; radially disposed member axially adjacent the buckets to close the sides thereof; and a plurality of segment liner plates releasably secured on the side of said radially disposed member adjacent the buckets.

6. The combination defined in claim 5 in which lips are provided on the liner plates, said lips covering the peripheral edges of the radially disposed members.

7. The combination set forth in claim 5 in Wihch the segment plates are spaced circumferentially from one another by said buckets.

8. A centrifugal crusher comprising; bowl means; an impeller rotatably mounted in said bowl means; means for driving said impeller in a direction of rotation, generally radially extending impact bar means in said bowl means in circumferentially spaced relation around said impeller means; back up plate means for said impact bar means extending generally parallel therewith on the back side of said impact bar means relative to said direction of rotation, and brace means rigidly connecting said back up plate means around the periphery of said bowl means inward of said bowl means.

References Cited by the Examiner UNITED STATES PATENTS 1,857,539 5/1932 Hadsel 241275 2,991,949 7/1961 Sellars 241275 2,992,783 7/1961 Wirth et a1. 24l275 2,992,784 7/ 1961 Behnke et a1 241275 3,044,720 7/1962 Bridgewater 241275 ROBERT C. RIRDON, Primary Examiner.

WILLIAM W. DYER, JR., LESTER M. SWINGLE,

Examiners.

D. L. MAXSON, D. KELLY, Assistant Examiners.

Claims (1)

1. A CENTRAL CRUSHER COMPRISING; BOWL MEANS; ROTATABLE IMPELLER MEANS ROTATABLY MOUNTED WITHIN THE BOWL MEANS; MEANS FOR DRIVING SAID IMPELLER MEANS; HOUSING MEANS EXTENDING OUTWARDLY FROM SAID BOWL MEANS; GENERALLY RADIALLY EXTENDING IMPACT MEMBERS IN SAID BOWL IN CIRCUMFERENTIALLY SPACED RELATION AROUND SAID IMPELLER MEANS; AND BOWL MEANS HAVING OPENINGS THROUGH WHICH SAID IMPACT MEMBERS EXTEND INTO SAID HOUSING MEANS; SAID HOUSING MEANS HAVING CIRCUMFERENTIALLY SPACED OPENINGS THROUGH WHICH SAID IMPACT MEMBERS MAY BE WITHDRAWN; REMOVABLE COVER MEANS FOR SAID LATTER OPENINGS; AND MEANS FOR RELEASABLY SECURING SAID IMPACT MEMBERS IN POSITION.

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