US703542A - Pulverizer. - Google Patents

Description

No. 703,542.' 7 Patented July I, I902.

' J. C. CLARK PULVEBIZER.

{Application filedlaune 18, 1897.) (No Model.) V 2 Sheets-Sheet l.

THE NORRIS Pz'rns coy. morouw a. WASHINGTON, o. c

' Patented lulv I. I902.

J. c; CLARK. 'PULVERIZER.

(Application filed Jgne 1S, 1897.)

2 Sheets-Shut 2.

(No Model.)

UNITED STATES JOHN C. CLARK, on

PATENT OFFICE.

ATLANTA, GEORGIA.

PULVERIZER.

SPECIFIGATION forming part of Letters Patent No. 703,542, dated July 1, 1902.

Application filed June 18, 1897. Serial No. 641,325. (No model.

parts will be more equally distributed and taken up and friction and wear-materially reduced.

With this object in View the invention consists in the novel construction and arrangement of the parts hereinafter more particularly described.

In the accompanying drawings, forming a part of this specification, and in which like letters of reference indicate corresponding parts, Figure l is a sectional view of the invention. Fig. 2 is a horizontal'sectional view on the line y y. Fig. 3 is a perspective view of the upper part of the frame, and'Fig. 4 is a sectional view through one of the grinding-rolls.

The invention has reference more particularly to that class of crushing-mills wherein the crushing-rolls are mounted upon dependingshafts and are adapted to be swung out-- ward by centrifugal force to cooperate with an annular ring or disk to effect a thorough pulverization of the material between the rolls and face of the ring.

Referring more particularly to the drawings, A designates the frame, consisting of a base-plate 1 and uprights 2, extending from the base-plate. This plate 1 is supported upon a suitable foundation of masonry and is provided with an annular flange 3, extending, preferably, both above and below the base-plate and having upon its inner face a series of separated blocks 4. Cast integral with these blocks, but separated from the flange 3 to leave spaces 3, is a pan or basin B, provided upon its interior face with an annular horizontal flange 5, upon which is supported an annular grinding-ring B. This ring may be made in sections, but preferably is made in one piece, and in order to hold it against rotation within the pan screws 6 are passed through the blocks 4 into engagement With the grinding-ring.

Surrounding and extending above the flange 3 of the base-plate is a casing D, connected at its upper end to a flanged ring 30, to which is-in turn connected a suitable cover 31. Within the casing D and surrounding and extending above the pan is a screen 32, of any desired mesh, which screen is separated from the casing to leave a space a: between the two, which corresponds to that between the pan and base-plate, and below the pan and communicating with the space as is a conical hopper 33, within thebottom of which is a screw conveyer 34: for conveying the pulverized material, which passes from the basin through the surrounding screen and space 00 to the bottom of the hopper to any suitable point. 1:.

The uprights 2 may be arranged in any desired manner and may be of any suitable shape, but preferably four uprights are employed,-which extend vertically from equidistant points around the exterior face of the flange 3, to which and to thebase-plate 1 they are secured. At their upper ends the up- ,rights are bent or curved inwardly toward each other, and at their extreme ends they are provided with segmental depending flanges 10, which are secured together to form a continuous annular flange and a central opening 10" by means of bolts which pass through lugs 10 of abutting flanges. Extending downwardly through the opening 10* is a journalbox '7, secured to the frame through a horizontal flange 8, which rests upon the upper faces of-the uprights. The main body of this journal-boxis of less diameter than the opening 10 and is out of contact with the surrounding flange. It is held, however, against lateral vibration by means of screws 9 passing through the flange and bearing uponthe exterior of the journal-box near its lowerend. These screws are made adjustable in order that the journal-box may always be maintained in a central position with respect to the uprights.

Connected to the uprights at points intermediate their ends are the horizontal radial arms of a spider 12, and this spider is provided with a central opening and a surround ing depending flange 13. Within the opening of the spider is disposed a journal-box 14, provided at its upper end with a flange which rests upon and is secured to the upper face of the spider. This box 14, like the journalbox 7, above described, and with which it alines, is also of less diameter than the opening'of the spider, through which it depends, and screws 15, passing through the flange 13 and bearing upon the exterior of the box at or near its lower end, serve to maintain it against vibration and in true alinement with the journal-box 7.

Passing centrally through the journalboxes 7 and 14 is a vertical driving-shaft 0, provided at its upper end with a head 16, having a bearing upon a suitable metallic washer 17, which in turn bears upon a shoulder of an oil-chamber in the upper end of the journalbox 7, and a suitable cap 17 is screwed upon the journal-box for covering and protecting the end of the shaft from dust and for maintaining the oil in its chamber.

In the interior faces of the journal- boxes 7 and 14 are formed one or more annular recesses for reception of balls or rollers 18, which bear upon the shaft 0. As shown, each journal-box is provided with a single interior recess which extends nearly throughout its length, and within each recess are disposed a single series of rollers, affording broad bearings for the central vertical shaft 0.

Fixed to the shaft intermediate the journal-boxes 7 14 is a driving-wheel 19, which may be driven ,from any suitable source of power. The shaft 0 projects through an opening of the cover 31 into the casingD, and upon its lower end is fixed a cross-head 20.

Supported in a swinging journalbox 21 upon each arm of the cross-head 20 is a grinding-roller shaft 22. The j ournal-boxes 21 are provided with trunnions 23, which are so supported upon the cross-head as to permit the boxes and their shaft to swing radially outward from the axis of the main drivin -shaft O, and each journal-box 21 is provided with an interior annular channel 24 for reception of a series of rollers 25, upon the peripheries of which the shaft 22 bears. At its upper end the shaft 22 is provided with an enlargement 26, having an under facing in the form of suitable metallic washer 27, which rests upon a shoulder 28 in an oil-chamber at the upper end of the journal-box. This chamber is provided with a cap, through which passes a cockhead bearing 29 in the form of a screw 40, the

inner end of which bears centrally upon or is in close proximity to the upper end of the shaft 22. Upon the lower end of the journalbox 21 is a packing-gland surrounding the shaft 22, for retaining the oil in the box.

The grinding-rolls E may be constructed and connected to their .shafts 22 in various ways, and they may be provided with either a roughened or smooth exterior surface and be of any suitable size, weight, and material. Preferably, however, each roll is provided with a central opening 41, formed with a conical seat 42, against which bears a correspondingly-shaped sleeve 43, the upper tapered end of which is normally below the top of the roll. This ring may be formed of a single piece, if desired; but preferably it is formed in two or more sections, two being shown in the present instance, and it is provided with a central cylindrical bore for the reception of the lower portion of the shaft 22. Thelower end ofthe bore is threaded, as indicated at 44, and the lower end of the shaft 22 is similarly threaded. Surrounding the central opening of the grindingroll E, on its upper end, is an annular flange, through the walls of which extend a transverse channel for the reception of a key 46, one edge of which is inclined, and the shaft 22 is provided with a slot, the upper wall of which is also inclined. In assembling these parts the roll E is slipped upwardly on the shaft 22, and the sleeve is then fitted on the shaft in the desired position, the threaded parts engaging each other and preventing the sleeve from slipping downwardly on the shaft. The roll E is then dropped down over the sleeve, and the key 46 is then inserted through the channel 45 and the slot in the shaft and driven home, which results in forcing the roll downwardly and clamping it tightly on the sleeve and the latter on the shaft.

Any suitable mechanism may be employed for feeding the material to be ground to the interior of the casing-such, for instance, as

that shown and described in my prior patent,

No. 561,491-but as no claim is made herein to such mechanism it is not deemed neces sary to show and describe it.

XVithout limiting myself to the precise construction and arrangement of parts shown and described, I claim as my invention- 1. In a pnlverizing-machine, the combination with a radially-swinging shaft having a threaded end and a transverse slot and means for moving the shaft in a circular path, of a grinding-roll provided with a central conical opening and a slot transverse the upper end of the opening, a sectional conical sleeve within the opening of the grinding-roll provided with a central threaded bore for the reception of the threaded end of the shaft, a key extending through the slots in the shaft and roll, and an annular grinding-ring with which the roll cooperates, substantially as set forth.

2. In a pulverizing-machine,'the combination with a radially-swinging shaft, havinga threaded end and a transverse slot, means for revolving the shaft, of a grinding-roll provided with a central conical opening and upon its face with a channeled flange, a conical ring within the opening of the grindingroll provided with a central threaded bore for reception of the threaded end of the shaft, a key passing through the slot of the shaft and channel of the flange and an annular grinding-ring with which the grinding-roll cooperates substantially as described.

3. The combination in a pulverizing-machine, of a rotatable shaft having an enlarged lower end of the box, substantially as dehead, a journal-box for the shaft having an scribed.

oil-chamber in its upper end, a shoulder upon In testimony whereof I have signed my which the head of the shaft bears, a cap for name to this specification in the presence of 5 the upper end of the journal-box, and abeartwo subscribing witnesses.

in adjustable in said cap and projectin upweirdly to maintain the head in engagement JOHN CLARK with the shoulder, an interior annular ehan- Witnesses:

nel containing a series of rollers which bear A. A. SMITH,

10 upon the shaft, and a packing-gland at the 1 OSCAR L. SMITH.

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