US2898053A - Impact crushing machine - Google Patents

Description

A118'- 4, 1959 H. J. ROGERS 2,898,053

IMPACT CRUSHING MACHINE Filed Jan. 3, 1958 2 Sheens-Sheel 2 K "7 e ATTORNEY dice IMPACT CRUSHING MACHINE Harry J. Rogers, Pleasanton, Tex. Application January 3, 1958, Serial No. 706,948 y 4 Claims. (Cl. 241--275) great `force for fractnring and crushing the aggregate solely by` impact force rather than by grinding or attrition. t l

A further object of the invention is to provide a crusher having an annular space between the corrugated shell surface and the rotor which Vis surrounded thereby and which diminishes in radial width toward the bottom outlet end of the crusher whereby as the rocks and stones are hurled back and vforth between the rotor and corrugated shell surface in their spiral travel downwardly through the annular space, the width -of said space will diminish as the rocks and stones are broken up and reduced in size.

A further object of the invention is to provide a crushing machine having an inlet at the top` thereof and an outlet at the bottom of the machine so thatthe material to be crushed will be fed by gravity tothe machine through the top thereof and the crushed and nely divided material will be discharged Vby gravity from a lower part of the machine. 'l

Another object of the invention is to' provide a machine wherein the rotor additionally functions as a blower for cooling the surfaces of the machine which are subjected to heat by frictional contact with the materials being crushed and for additionally blowing iinely crushed particles from the machine through the outlet thereof to prevent such particles accumulating on the corrugated inner face of the shell.

yStill another object of the invention is to provide a machine of extremely simple construction which may be very economically manufactured and sold, which can be eciently operated with a power source of low horsepower and wherein the parts subject to wear are readily replaceable.

Another object of the invention is to provide a machine having a minimum of bearings and wherein the bearings are sealed oil from abrasive substances produced by the crushing action of the machine.

Various other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings, illustrating a presently preferred embodiment thereof, and wherein:

Figure 1 is a front elevational view of a preferred embodiment of the crushing machine;

Figure 2 is an enlarged vertical sectional view thereof, taken substantially along a plane as indicated by the line 2 2 of Figure l;

Figure 3 is a horizontal sectional view through the upper portion of the machine, taken substantially along a plane as indicated by the line 3 3 of Figure 2;

Anited States Patent Figure 4 is a fragmentary horizontal sectional view taken through the lower portion of the machine, substantially along the line 4-4 of Figure 2;

Figure 5 is a fragmentary radial sectional View, taken substantially along a plane as indicated by the line 5-5 of Figure 3, and

Figure 6 is a detailed horizontal sectional view through a portion of the rotor, taken substantially along a plane as indicated by the line 6-46 of Figure 2.

Referring more specifically to the drawings, the impact crushing machine in its entirety is designated generally 8 and includes a base 9 which is adapted to rest upon any suitable horizontal supporting surface 41i). Upright posts 11 are fixed to and rise from the base 9.

A4 shell or housing, designated generally 12, includes a bottom section 13 having an open top and a substantially cylindrical upper portion including a side wall 14. Said bottom shell section 13 has a substantially semicircular horizontal bottom portion 15, as best seen in Figure 2, which is disposed beneath and adjacent the open top of the bottom shell section 13. The other half of the bottom of the section 13 is closed by an inclined bottom portion 16 which forms a chute, the rounded bottom edge of which terminates above but adjacent the level of the underside of the base 9. The semicylindrical portion of the side wall y14 which surrounds the chute portion 16 is extended downwardly relative to the side wall portion 14 which surrounds the flat bottom segment 15, so that said first mentioned side wall portion has its bottom edge secured to the marginal edge of the chute 16. Said first mentioned side wall portion 14 is provided with a discharge opening 17 located at the lower end of the inclined bottom surface or chute 16 and which constitutes the only opening at the bottom of the shell 12. The upwardly extending posts 11 are secured to the cylindrical wall 14 for rigidly supporting the bottom shell section 13 above the 4base 9. The shell 12 also includes acylindrical upper shell section 18 which is open at both ends and which is of the same diameter as the upper portion of the lower shell section 13, and the open lower end of which rests upon and is supported by the upper edge of the wall 1 4.

A flanged cover 19 is detachably mounted on the open upper end of the upper shell section 18. As best seen in Figure l, the upper portion of the wall 14 and the lower portion of the upper shell section 13 are each provided with circumferentially spaced outwardly projecting apertured lugs 20. The lugs 20 of the shell section 18 rest upon the lugs 20 of the lower shell section 1,3 and said lugs are detachably connected together by nut and bolt fastenings 21 for detachably assembling the shell sections 13 and 18 together. The Harige 22 of the cover 19 has similar outwardly projecting apertured lugs 20 at its bottom edge which rest upon outwardly projecting lugs 20 of the upper shell section 18, and which last mentioned lugs are similarly connected together by ad-` ditional nut and bolt f astenings 21 for detachably securing the cover 19 on the open upper end of the shell 12. The cover 19 is provided with a centrally disposed flanged inlet opening 23 constituting the inlet of the machine 8.

A tubular column 24 has an intermediate portion extending through and secured in an opening 25 which is formed partially in the bottom 15 and partially in the chute 16, so that the column 24 is supported rigidly in an upright position by the bottom shell section 13 and substantially centrally of the shell 12. The tubular column 24 is provided with antfricton bearings 26 and 27 near the ends thereof, the outer races of which are secured to thecolurnn 24 and-taper inwardly with respect thereto. A shaft 28 extends longitudinally through the column 24 and is journaled in the bearings 26 and 27. The shaft 28 has a threaded portion 29 near its lower end which is engaged by a nut 30. The -nut 30 bears against and supports the inner race of the lower bearing 27 which is loosely mounted on the shaft 28 andrdisposed at the lower end of the column 24. The inner race of the upper bearing 26 is xed to the shaft 28, as byA welding, as seen at 36, for supporting the shaft in the column 24. The shaft 28 has a restricted portion 31 which extends downwardly from its threaded portion 29 and to which a multiple grooved belt pulley 32 is secured. The belt pulley 32 is disposed between spaced sill portions of the base 9 and hasv endless belts 33 trained therearound and which are driven from a suitable power source, not shown, for imparting rotation to the belt pulley 32 and shaft 28. A lubricant fitting 34 extends through the wall of the hollow column 24 above and adjacent the lower bearing 27 and a lubricant supply conduit 35 has a discharge end opening radially through the tubular column 24 above and adjacent the upper bearing 26, which is spaced from the upper end of the column 24, for lubricating the bearings 26 and 27.

A rotor, designated generally 37, includes a substantially dat disc 38 having a depending centrally disposed internally threaded socket 39 which extends into the upper end of the column 24 and is detachably secured to the threaded upper end 40 of the shaft 28. The socket 39 may be secured by additional welding 36 to the disc 38. The upper side of the disc 38 has a plurality preferably four vanes 41 fixed thereto and disposed with their planes perpendicular to the plane of the disc. Each vane 41 extends from adjacent the center of the disc 38 to approximately its periphery and each vane is disposed substantially parallel to another vane and at substantially a right angle to the two remaining vanes, as seen in Figure 3. The inner ends of the vanes 41 have their upper edges recessed as seen at 42 to provide a concave curvature. The inlet opening 23 opens into the recessed inner ends of the vanes 41, as seen in Figure 2. An armor member 43 of thick, hard, wear resistant metal is detachably secured to the forward or leading side of each vane 41 by screw fastenings 44, as best seen in Figure 3. The armor members 43 have inner ends 45 the upper edges of which are recessed -to conform to the recessed inner ends 42 of the vanes and said inner ends 45 are also beveled on their outer sides toward their inner terminals, as seen in Figure 3. The outer ends of the armor members 43 project beyond the outer ends of the vanes 41 and are thickened on their trailing sides as seen at 46 to engage across the outer ends of the vanes 41. The rotor 37 also includes a plurality, preferably four rigid platelike arms 47 having upper ends secured to the underside of the disc 38 and which extend downwardly therefrom to adjacent the level of the bottom edge of the upper shell section 18. The planes of said arms 47 are disposed radially of the rotor 37 and the upper ends thereof are secured to the disc 38 so that the outer edge of the upper end of each arm is disposed substantially flush with a portion of the periphery of the disc 38. The arms 47 are inclined downwardly and outwardly relative to the disc 38, as seen in Figure 2. An armor member 48 is secured to the forward or leading side of each arm 47 by screw fastenings 49 for detachably mounting the armor members 48 on the arms 47. As best seen in Figure 6, the armor members 48 are also relatively thick and are formed of a hard wear resistant metal and have thickened outer edge portions 50 which extend across the outer edges of the arms 47.

The upper shell section 18 is provided 'with a lining 51 of thick metal including an upper half 52 of uniform internal and external diameter and a lower half 53 the outer diameter of which is uniform but the inner diameter of which diminishes toward its bottom edge due to the fact that` the lower liner half`53 increases in thickness toward its bottom edge. The inner face of both liner halves 52 and 53 is corrugated as seen at 54, being composed preferably of substantially V-shaped ribs and grooves. Each half 52 and 53 of the liner 51 is preferably composed of a plurality of ring segments 55, as best seen in Figures 2 and 3, each of which is secured to the inner side of the shell section 18 Iby a plurality of screw fastenings 56. The shaft 28 can be revolved at a high rate of speed by a power source of approximately ten horsepower to turn the rotor at a high r.p.rn. in a counterclockwise direction, as indicated by the arrow in Figure 3. Stone, lgravel and other hard materials up to six inches in size may be fed by gravity into the machine 8 through the inlet opening 23 and will be engaged by the armor members 43 of the vanes 41 and will be hurled with great force centrifugally against the corrugated inner face of the upper liner half 52 and will rebound therefrom into the path of travel of the armored leading sides of the arms 47 by which the fragments,.not shown, will be again hurled centrifugally outward against the corrugated inner liner face 54. This back and forth movement of the rock, stone or gravel, not shown, will continue until the particles have passed downwardly from the upper shell section 18 into the lower shell section 13. The travel of the fragments will be in a spiral course around the rotor as the fragments are thrown back and forth between the rotor and liner 51, so that each rock or stone will be broken into a num-ber of small fragments. As the broken fragments progress toward the bot- Ytom of the upper shell section 18 the gap between the corrugated liner face 54 and the outer edge portions 50 of the armor members 48 diminishes so that there will be a more rapid rebounding of the smaller fragments back and forth between said armor members 48 and the corrugated inner face 54 of the lower liner ring 53 to effect a breaking up of the rock, stone or gravel into very small fragments. The size of the fragments discharged into the lower shell half 13 will depend upon the rate at which the rotor 37 is revolved and to some extent upon the spacing between the outer armored edges 50 and the corrugated inner face 54 of the lower liner half 53. The portions of the broken fragments discharged into thel lower shell half 13 will come to rest upon the llat bottom 15 while the remainder of the fragments will fall onto the chute 16 and be discharged by gravity therefrom through the outlet 17. The aggregate fragments landing on the flat bottom 15 will be propelled therearound and onto the chute 16 by other fragments being thrown onto the bottom 15 from the rotor 37 and will thus be further reduced in size before being propelled down the chute 16 to the outlet 17.

The rotor 37 additionally forms a blower for cooling the machine 8 and for blowing dust particles therefrom through the outlet 17 and which would otherwise accumulate in the corrugations 54.

Various modifications and changes are contemplated and may be resorted to, without departing from the function or scope of the invention as hereinafter defined by the appended claims.

I claim as my invention: v

l. An impact crushing machine for rock, stone, gravel and other materials to be crushed, comprising a fixed shell, a rotatably driven rotor mounted centrally within a portion of said shell and including a substantially flat disc, said shell having a corrugated inner face disposed substantially concentrically around and spaced outwardly from said rotor, said shell having a top portion provided with substantially centrally disposed inlet opening through which material to be crushed is adapted to be fed by gravity onto said disc, rigid vane members fixed to and rising from said disc and extending inwardly from adjacent the periphery of the disc, said vane members being rotatable with the disc, beneath said top portion, for hurling the material by centrifugal force from the disc against said corrugated shell face, and arms fixed to and extending downwardly from the underside of the outer portion of said disc, said arms being of substantial radial width and having downwardly and outwardly inclined outer edges disposed in downwardly converging relation to the corrugated inner shell face.

2. An impact crushing machine as in claim 1, and armor members detachably secured to and covering the leading sides of said vane members and arms and having outer edge portions extending across the outer edges of the 'vane members and arms.

3. An impact crushing machine as in claim 1, said corrugated inner shell face including an upper portion of substantially uniform diameter surrounding said disc and vane members and a lower portion of downwardly diminishing diameter surrounding the lower portions of said arms.

4. An impact crushing machine as in claim 1, said shell having a substantially at approximately semicircular bottom portion disposed beneath and spaced from said rotor and said corrugated inner shell face, and another substantially semicircular inclined bottom portion extending downwardly from said substantially iiat bottom portion and forming a lchute, and said shell including a side wall having an outlet opening disposed adjacent the lower end of said chute and constituting the outlet of the machine.

, References Cited in the tile of this patent UNITED STATES PATENTS 315,716 Burr et al. Apr. 14, 1885 982,516 Marks Jan. 29,1911 994,596 Marks June 6, 1911 1,228,338 Marks May 29, 1917 1,532,742 Hadsel Apr. 7, 1925 1,561,031 Simpson Nov. 10, 1925 2,357,843 Morrissey Sept. 12, 1944 2,580,579 Neenan Jan. 1, 1952 2,682,376 Frank June 29, 1954 2,780,417 Harris Feb. 5, 1957 FOREIGN PATENTS 444 Great Britain of 1876 263,660 Great Britain Jan. 6, 1927 376,760 Great Britain July 5, 1932

Images