US2475814A - Edge runner mill - Google Patents

Description

July 12, 11949.

K. BRUCHSALER EDGE RUNNER MILL 3 Sheets-Sheet 1 Filed Aug. 25, 1944 INVENTOR. MEL 5EucH ALER W July 12, 1949.. BRUCHSALER EDGE RUNNER MILL 3 Sheets-Silesia 2 Filed Aug. 25, 1944 INVENTOR. KARL BRUCHSALEE fl-m/enfs July 12, 1949. K. BRUCHSALER EDGE RUNNER MILL Filed Aug. 25, 1944 3 Sheets-Sheet 5 INVENTOR.

KA EL. BEUCHSA LE2 BY W M firm/2M5 Patented July 12, 1949 UNITED STATES PATENT OFFICE EDGE RUNNER MILL Karl Bruchsaler, Stockton, Calif.

Application August 25, 1944, Serial No. 551,155

'7 Claims.

This invention relates to pulverizing machines of the edge runner mill type.

An object of the invention is to provide a pu1- verizing mill of the edge runner type or machine for crushing ore or grinding various substances or materials with greater efficiency and in high comparative quantities without the danger of clogging or jamming of the machine by accumulation of the ore or the like.

Another object of the invention is to provide a pulverizing mill of the edge runner type in which material can be crushed or ground in a continuous operation and in which the crushing is accomplished by a plurality of heavy roller wheels positively guided or moved on a surface rotated in a direction opposite to the direction of rolling of said wheels, and in which the material is fed to the race in such a manner as'to efficiently find its way on the race, and thereafter the crushed material be conveniently discharged only when it is crushed to a predetermined consistency and then collected and conducted to a convenient outlet.

Another object of the invention is'to provide a pulverizing mill of the edge runner type in which a plurality of heavy rollers with crusher shoes are rolled upon a race and suitable liquid is discharged alongside the rollers toward the race, and in which the material to be crushed is fed for even distribution around the entire race and the entire path of said rollers, and in which the discharge of the crushed material is conveniently controlled and guided.

With the above mentioned objects and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings, and set forth in the claims hereto appended, it being understood that various changes in the form, proportion, size and minor details of construction within the scope. of the claims may be resorted to without departing from the spirit or without sacrificing any of the advantages of the invention.

With the foregoing and other objects in view, which will be made manifest in the following detailed descriptiomreference is had to the accompanying drawings for the illustrative embodiment of the invention, wherein Fig. l is a sectional view'of. my pulverizing; mill.

Fig. 2 is a plan view of my pulveriz-ing. mill.

Fig. 3 is a sectional plan: view ofmy pulverizing mill, the section being taken on lines. 3-3 of Fig. 1, and

Fig. 4 is a sectional detail view, the section being taken on lines 4-4 of Fig. 1.

In its general organization my invention includes a base i, a race structure 2 rotatably supported on the base, a rotatable crushing mechanism 3 which drives and rolls heavy crusher rollers 4 on the race structure 2, and a drive mechanism 6 connected to both the race structure 2 and the crushing mechanism 3 for driving them in opposite directions to each other.

The base] may be of any suitable construction, but it is preferable that the same be made of a welded structure of angle irons. This base I includes'ground bars I from which extend upwardly vertical stays B, a central hub 53, an outer peripheral rim II, and a plurality of radial beams l2 extended between the hub 9 and the rim ll andforming the top of the base I. On each of the beams l2, and equidistant from the center of thehub 9" are provided a pair of bearing brackets l3 so positioned that the journal axes of the bearing brackets l 3 are radial with respect to the center of the hub 9 and substantially parallel with the. respective beams l2. In each pair of bearing brackets I3 is journaled a shaft l4 on which is supported a gear Hi.

The race structure 2 includes a race frame II.

In the present form the race frame is in the shape of a substantial and strong ring, which, in the present illustration, is cast and is hollow so as to reduce the weight of the rotating race structure 2. From the bottom of this race frame l1 extends a ring gear I 8 which is of the same radius as' the radial distance of each gear [6 from the center of the base hub 9, and which is in mesh with. said gears l6 and is supported thereon.

From each bearing bracket l3 extends upwardly an auxiliary bracket l9 arranged for a vertical journal. In each auxiliary bracket is is journalled' an aligning roller Zil. These rollers 20 may be made of suitable non-friction material and are located opposite to and in engagement with a side of the ring gear [8. In each set of bearing brackets [3 there are two such auxiliary brackets l9 and aligning rollers 20. The engagement of the opposite sides of the ring gear l8 at spaced points around its circumference by the aligning rollers 20 maintains the ring gear On its rotary track and on the gears I6.

The top of the race frame I! has an annular dished race 2| thereon. In the present illustration thi'sdished race 2! is formed by a transversely" concave lining or insert placed in a hollow-"recess 22 formed circularly on the top of the race frame 11. At spaced intervals retaining 3 ribs 23 protrude from the underside of the race lining 2| and engage grooves 24 in the bottom of the recess 22 for anchoring the dished race lining 2| in the recess 22. This dished race lining 2| may be made in several sections or in one piece,

as required.

The rotating crushing mechanism 3 for rolling the crusher rollers 4 on said dished race 2| includes a vertical mast structure located centrally with respect to the annular race frame I! and with respect to the base hub 9. A shaft 25 is journalled at its lower end in suitable thrust bearings 28 in a bearing cup 21 at the bottom of the base and centered inside of the base hub 9. Approximately intermediate between the ends of the vertical shaft 25 is provided another bearing 28 which bearing 28 in turn is supported on suitable braces 29 extended from the top of the base L It is to be understood that as many bearings may be provided along the vertical shaft 25 as needed for the steady journalling of said shaft 25. On the top of the shaft 25 is keyed a supporting head 3 In the present illustration the supporting head 3| is held between a collar 32 at its lower end and a securing nut 33 at the top. The supporting head 3| has a plurality of radial arms 34 extended therefrom over and above the dished race 2|. In the present illustration the arms 34 are formed by suitable bars or tubes set into sockets 36 in the supporting head 3| and held in place in any suitable manner such as by set screws 31. From each arm 34 are suspended a pair of opposite bearing bracket bars 38. Each bearing bracket bar 38 is pivoted on the arm 34 and is suitably held in position thereon. In the lower ends of the bracket bars 38 is held a roller shaft 39. A crusher roller 4 is journalled on each roller shaft 39 and moves as a wheel on the dished race 2|. As the shaft 25 is rotated it rotates the supporting head 3| which in turn carries the arms 34 around and above the dished race 2|, and by reason of the pivotal swivelable engagement of the bracket bars 33 on the arms 34 the rollers 4 are pulled along in the nature of heavy wheels and ride in rolling contact on the concave track of the dished race 2| crushing the material in said race 2|.

Each roller 4 is made of suitably heavy material and of such weight as to operate as a crusher by its own rolling weight and without any additional pressure thereon. A hub 4| forms the center of each roller 4 and is suitably journalled on the shaft 39. Around the hub 4| is fixed a wheel shoe 42 of suitable thickness and of the type of material which will stand up under wear. The outer periphery of the roller hub 4| is slightly conical, and the inner periphery of the shoe 42 is also conical but in opposite direction to the incline of the periphery of the hub 4|. This conical arrangement is comparatively small and just sufiicient to provide converging wedge-like annular space 43 into which an annular wedge 44 is driven tightly to hold the shoe 42 on the hub 4|. This construction permits the removal of the shoe and its replacement when needed.

It is to be noted that the bracket bars 38 are of such length that when the roller wheels 4 roll upon the dished race 2| the said rollers trail the arms 34. This arrangement allows for a limited pivoting or swivelling of the rollers 4 relatively to the arms 34 and prevents jamming and breakage, and compensates for wear, although it does not impede the crushing action of the rollers 4 which perform the crushing and pulverization by their own weight.

, power mechanism such as an electric motor.

When the drive shaft 46 is rotated the gear I3 thereon imparts rotation to the ring gear l8 and to the race structure 2. The transmission gears 41 and 48 simultaneously impart rotation to the crushing mechanism in a direction opposite to the direction of rotation of the race structure 2.

The feeding of the ore or the material to be crushed is accomplished in such a manner as to further prevent the piling of material and to provide for uniform distribution of the material around the top of the race structure 2. An annular feed trough 52 is open both at its top and bottom and is provided with a plurality of transverse saddles 53 which latter rest upon the respective radial arms 34 of the crushing mechanism between the supporting head 3| and the rollers 4. The top of the trough 52 has upwardly diverging sides. Skirts 54 extend from the trough 52 downwardly between the saddles 53 for directing the ore. The side walls 56 of the skirts 54 nearer to the rollers 4 are substantially vertical so as to prevent the material from spilling over the rollers 4. The other side walls 5'! of the skirts 54 flare inwardly and downwardly toward the center of the machine. A frusto conical shield 56 extends from the inner top corner 59 of the race frame I 7 and tapers upwardly past the lower edge of the flaring side walls 51 of the trough skirts 54 so that the material dropping from the trough is guided outwardly and toward the dished race 2 I. It is to be noted that the top of the race frame I! in continuation of the shield 58 is inclined toward the dished race 2| to facilitate the flow of material into said dished race 2! and under the rollers 4. The aforedescribed feeding structure is rotated and carried with the crushing structure spreading the ore around the race frame IT. The rotation of the race frame l1 exerts centrifugal force for further distribution of the ore evenly around the top of the race frame I! and toward and into the dished race 2 I.

For further moistening the material around and in the dished race 2|, a pair of outlet nozzles 59 are provided, one on each side of each roller Water or other suitable liquid is conducted to these nozzles 59 by conduits 6| extending along the bracket bars 38, and then joined in one conduit and extending alon the arm 34 under the respective saddles 53 and radially at the supporting head 3| to a centrifugal feed chamber 62 formed around the vertical shaft 25 below the collar 32. The upper portion of the shaft 25 is hollow so as to form a passage '63 which is suitably connected to a rotatable joint for receiving water from any suitable source. At the location of the chamber 62 the shaft 25 has a lateral port 64 leading from the shaft passage 63 into said chamber 62. The conduits 6| at their inner ends are connected to ports 66 at the periphery of the feed chamber 62 so that the pressure built up by centrifugal force, as the water is ejected through the ports 64 will force the water through the reaha-$814 spective conduits and spray them out at the nozzles 59 along the opposite sides of each roller 45.

The discharge of the ground or crushed maiterial from the race frame I! is also accomplished in a controlled manner. A substantially, cylindrical screen 6.? is. mounted around the top of the race frame 11. and outside. of the rollers 4. In the present illustration, vertical bolts 68 extend upwardly from the race frame ll near the outer periphery of the. said race frame IT. The screen 8"! is tightened around the plurality of bolts 68, in the present illustration by oviding the free ends of thescreen 6'1 with securing flanges 69 which are tightened together and held by any suitable securing means such as bolts. The screen St is of such mesh as to allow the passage only of material of selected density. Therefore, only material crushed to a certain fineness will be permitted to. passv through the screen 61. It is to be noted that the rim H or" the top of the race frame I! is slightly higher than the tOp of the dished race 2i so that the material thrown out by the centrifugal force accumulates there gradually and is forced through the screen 61 by said centrifugal force when of sufficient fineness but is allowed to drop back into the race 2| for further grinding if it is not allowed to pass through the screen El.

The lower corner of the outer periphery of the race frame H has an outwardly extended downwardly curved discharge lip 12. The material flowin out through the screen '69 flows down along said lip 2! and is directed downwardly as the race frame ll is rotated. Around the base I and beneath the discharge lip 12 is an annular collecting trough l3 which is held stationary on the base I and is so located that the collected material from the discharge lip 12 feeds into this collecting trough I3. One side of this collecting trough T3 is higher and the trough 13 slants downwardly toward the opposite side and has an outlet It at its lower side. The crushed ore or material discharged into this collecting trough 13 fiows by gravity and washes down and out through the outlet M to be there collected and treated in any usual manner.

The pulverizin mill heretofore described is operated very simply because by turning on the power the opposite rotation of the race and the rollers is accomplished in continuous synchronism, the rollers roll in crushing contact on a properly curved and dished race and by reason of the opposite rotation a fine and thorough grinding and pulverizing of the ore is accomplished. The arrangement of the feed trough as it is carried by the roller structure and the centrifugal distribution of the material in opposite directions provide for uniform crushing action along the entire periphery of the race of the mill. The centrifugal discharge of the material as herein controlled assures a uniformity of product. The various groups of elements and combinations of such elements produce a machine which operates with greater efficiency, utilizes less power, does not require any frequent clean-up, it does not require any particular adjustment, it is simple in structure and it is eminently adapted to a variety of materials for which such mills are utilized.

I claim:

1. In a pulverizing machine, a substantially annular race, a supporting device rotating around an axis central with respect to said race, radial arms extended from said supporting de- 6 viee,' crusher rollers, suspending elements supported on said arm and rotatably supporting said rollers in rolling contaet'with said race, feeding means earriedbysaid arms for directing the material to be crushed onto said race, and a system of liquid conduitson said supporting device and within said arms and said suspending elements conducting liquid to about the center of said rollers.

2. In a pulverizing machine, a substantially annular race, a supporting device rotating around an axis central with respect to said race, radial arms extended from said supporting device, crusher rollers, suspending elements supported on said arms and rotatably supporting said rollers in rolling contact with said race, feeding means carri'ed on saidarms for directing the materialto be crushed onto said race, and a system ofcentrifugal liquid feeding conduits extended within said arms and suspendin elements, and: outlets on said-' conduits directed alongside each roller toward said race.

-3 In a pulverizing machine, an annular race being transversely dished, a removable lining, in said race, means on said. lining engaging said race to prevent circumferential shifting of said race, said race being in a substantially horizontal plane, a roller support extended substantially centrally to. a level above said race and being rotatable about an axis substantially central to said race, a plurality of crusher rollers riding in said race, means to pivotally support said rollers on said roller support in substantially vertical planes with respect. to said race, and: means to impart opposite rotation tosaid support and rollers and to said race.

4. In a pulverizing machine, an annular race, a rotatable support extended approximately centrally of said race and above said race, a supporting hub on said support above the level of said race, a plurality of radial arms extended from said hub to above said race, suspension brackets depending from said arms towards said race and being swingable around the axes of the respective arms, crusher rollers journaled in said suspension brackets and rolling on said race, and means to impart opposite rotation to said support and rollers and to said race.

5. In a pulverizing machine, an annular race, a rotatable support extended approximately centrally of said race and above said race, a supporting hub on said support above the level of said race, a plurality of radial arms extended from said hub to above said race, suspension brackets depending from said arms towards said race and being swingable around the axes of the respective arms, crusher rollers journaled in said suspension brackets and rolling on said race, and means to impart opposite rotation to said support and rollers and to said race, a substantially annular hopper supported on said arms between said hub and said brackets, a substantially annular chute extended from said hopper to below said arms and toward said support, said hopper discharging through said chute, and means on the race extended toward said support and below said chutes to guide the ore from said chutes downwardly towards said race.

6. In a pulverizing machine, an annular race, a rotatable support extended approximately centrally of said race and above said race, a supporting hub on said support above the level of said race, a plurality of radial arms extended from said hub to above said race, suspension brackets depending from said arms towards said race and being swingable around the axes of the respective arms, crusher rollers journaled in said suspension brackets and rolling on said race, and means to impart opposite rotation to said support and rollers and to said race, a substantially annular hopper supported on said arms between said hub and said brackets, a substantially annular chute extended from said hopper to below said arms and toward said support, said hopper discharging through said chute, and an annular extension on the inside periphery on said race inclined from said guide means outwardly and downwardly to the chute.

7. In a pulverizing machine, an annular race, a rotating support extended substantially centrally and above said race, a supporting hub on said rotating support above the level of said race, radial arms extending from said hub, swiveling brackets depending from said arms, crusher rollers journaled in said brackets and rolling on said race, said central support having a fluid chamber therein communicated with an outside fluid supply, radial outlets on said fluid chamber, a system of radial conduits extended from said outlets generally radially Within said arms and then downwardly in said brackets and to said rollers to conduct liquid from said chamber to said rollers, said liquid being expelled through the centrifugal force created by the rotation of said chamber with said support.

KARL BRUCHSALER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Re. 1,669 20,012 98,297 216,102 400,681 441,867 521,663 573,890 584,980 626,326 639,418 660,373 757,433 774,329 893,535 936,079 943,486 986,608 1,031,730 1,014,273 1,247,633 1,264,558 2,177,945 2,303,319

Number Name Date Wheeler May 10, 1864 Williams Apr. 20, 1858 Pugh Dec. 28, 1869 Palmer June 3, 1879 Hinkle Apr. 2, 1889 Fitch Dec. 2, 1890 Moore June 19, 1894 Mantey Dec. 29, 1896 Best June 22, 1897 Keyton June 6, 1899 Mann Dec. 19, 1899 Halsey Oct. 23, 1900 Becht Apr. 19, 1904 Meralls Nov. 8, 1904 McLure July 14, 1908 Best Oct. 5, 1909 Tatman Dec. 14, 1909 Trent Mar. 14, 1911 Pitken July 9, 1912 Wallace Jan. 9, 1912 Buckingham Nov. 27, 1917 Richards Apr. 30, 1918 Piper Oct. 31, 1939 Beardsley Dec. 1, 1942 FOREIGN PATENTS Country Date Great Britain 1898 Great Britain 1914 Great Britain Mar. 17, 1885 Great Britain 1899 France Sept.14, 1840 France Jan. 6, 1903

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