US2612083A - Beater roll - Google Patents

Description

F. HAYES BEATER ROLL Sept. 30, 1952 Filed-Sept. 3, 1947 2 SHEETSSHEET l F. HAYES BEATER ROLL Sept. 30, 1952 Filed Sept. 5, 1947 2 SHEETSSHEET 2 Patented Sept. 30, 1952 BEATER ROLL Frank Hayes, Hoosick Falls, N. Y., assignor to Noble & Wood Machine 00., Hoosick Falls, N. Y., a corporation of New York Application September 3, 1947, Serial No. 771,942

4 Claims.

My present invention relates to beater rolls, and more particularly to beater rolls for use in connection with the manufacture of paper.

I-Ieretofore beater rolls have been constructed by building up on the roll body a filling consisting of bars and spacers. In one form of such roll, the filling was segmental, each segment being riveted together as a unit, and each segment being provided with one extending bar which fitted into a slot or keyway machined into the surface of the cylindrical roll body or shell. The individual segments were held to the cylindrical body or shell by so-called hook bolts spaced at intervals across the face of the shell, and at each end by cap screws turned from underneath the roll shell.

While this construction was practical it was never entirely satisfactory, because it was dinicult to turn in the so-called hook bolts so that the contacting surfaces were on an exactly even plane across the face of the roll; it was difficult to locate the holding rods, which were built into the segments themselves, so that .these were equally spaced from the bottom of the segment to the center of the holding rod; and. because each of the segments was of all metal construction, and in order to assure absolutely tight roll filling construction, with no vibration or working of the various individual segments, the sides must necessarily mate exactly one to the other a mechanical job difficult enough in a, shop and even more so when making replacements in the field.

With this type of filling, failure in service was apt to occur when there was lack of proper contact on all the hook bolts across the face of the roll in various segments, or lack of proper side bearing, segment to segment, or both. Under such conditions, some of the segments might work, or lean sidewise, when submitted to bed plate pressures, resulting in undue strain being placed on the fixed cap screws holding down the segments on the end, with the consequent shearing off of such screws.

In my present invention, I have obviated the faults in such prior construction by eliminating the necessity for machining longitudinal slots in the roll body and by eliminating the use of unit segments comprised of a plurality of spacers and roll bars.

According to my present invention I provide the roll body with only enough slots to divide the peripheral surface thereof into zones, mount on the roll body both roll bar and spacer locking means, and 'build up the filling out of individual roll bars and spacers.

By this construction I am able to individually lock each roll bar and each spacer to the roll body at a plurality of points along their length, and by dividing the surface of the roll body into zones I may remove any individual roll bar or spacer from the assembly for repair or replacement without disturbing any of the other elements. This construction not only makes for a better beater roll, but, one which may be successfully repaired without removal from the machine.

The principal object of my invention is therefore an improved beater roll for beaters and like refiners.

Another object is an improved filling for beater rolls by means of which a maximum number of roll bars may be employed and a minimum spacing between bars may be obtained, thereby reducing to the minimum the slotting of the roll.

Another object is an improved beater roll in which the number of roll bars, as well as the thickness thereof, and the spacing between said bars, may be varied. With a slotted roll, it is not possible to vary the number and spacing of the roll bars.

A further object is an improved beater roll in which the filling, comprised of the roll bars and spacers, can be removed and/or replaced without the necessity of removing the beater roll from the beater.

A further object is an improved beater roll in which any individual roll bar or spacer can be removed and/ or replaced without disturbing any of the remaining roll bars 'or spacers.

A further object is an improved beater roll in which the roll bars are mounted directly upon the outer circumferential face of the roll body.

A further object is an improved beater roll in which the circumference of the roll body is divided into segments or zones by spacers set into slots formed in the roll body and extending parallel to the axis thereof, and in which said spacers are removably locked in position on the roll body.

Other objects and novel features of the construction and arrangement of parts comprising my improved beater roll will appear as the description thereof progresses.

In the'acco-mpanying drawings illustratin a preferred embodiment of my invention:

Figure l is a fragmentary end elevational view, partly in section, of the upper portion of a beater roll.

Figure 2 is an end elevational view of the assembled beater roll.

Figure 3 is a side elevational view showing one With the common type of slotted rolls, it is:

customary to provide slots in these spiders of proper size and number to accommodate the size and number of fly bars designated. It'will be apparent therefore that While the thickness'of the fly bar may conceivablybevaried at the cutting or working edge, the size of that portion fitting into the slot or the number of bars in the roll or the spacing between the bars cannot be varied. It also is'generally 'necessaryto fill such rolls with'wood-spacersor wedges driven between thebars'and' projecting-below the bars, the swelling of the woods being depended upon to solidly hold the bars'in place and toanchor the woods beneath the bars to prevent them from'working out in'operation.

In my new roll I'bui-l'd up theroll body from individual heads or spiders pressedon the spindle orshaft much the same as in the common types of beater rolls but instead of these heads being turned in steps on their outer peripheral surfaces I turn these outer surfaces hat and on a perfect plane across the face of the roll. After this tuming operation is completed I machine approximately sixteen slots l3 across the face of the roll,

dividing the roll into sixteen equal segments on.

the circumference. A'forged band or hooked ring I4 is then shrunkon each of the inside heads (number of heads depending on length or face of roll) and'the under surface of this band where the hook is formed, marked I51 is accurately machined in relation to the outside circumference of the 'roll heads.

Referring to Fig. 3, there is shown in side elevation, a metal segment spacer bar 16 having cutout portions I'l' intermediate its ends and provided with hook member l8 for engaging the under faceof the hook portions of the bands or rings l4. At their ends, bars l6, are provided with hook members [9 for a purposeto be hereinafter described.

In filling the roll, sixteen segmentspacer bars I6 of the proper thickness'and width, are inserted into the grooves I3 and then driven to contact position under thehook members 15 of the bands or rings; Hi; This divides the surface of the roll body I I into'sixteen equal segments.

For clearness of description it will be under? stood that the roll being described will contain one hundredand ninety, two cutting bars threesixteenths thick; with equal spacing approximately .6715" at bar edges so that each of the sixteen segments will containtwelve cuttingbars The segments are filled with cutting bars and intermediate spacer bars 2 I, illustrated in end section in Fig. l, but the side elevation of the segment-spacer bar I6 in Fig. 31' illustrates equally well the construction, in side elevation, of the cutting bars 20 and intermediate spacer bars 2|.

Filling of the segments will progress from the fixed holding spacers H5 at the end of each segment, working towards the center of that segment, installing first a cutting bar 20 and then an intermediate spacer 2 I, and driving each bar and each spacer tightfagainst its neighbor, with the hook members I8"'locking'under the hook portion l5 of the bands or rings l4. This continues until all but the last intermediate spacer 21 has been installed.

It may be presumed that there will be some variation in theirolled thickness of the cutting bars '20; and the-final intermediate spacer may haveto' be-machined to proper size to draw up tightly. this-final. segment of filling.

As stated above Fig. 3 may serve equally well to illustrate the segment spacer (6, the intermediate spacers 2l and the cutting bars 20. The intermediate spacer bars=2l difier only from the segment spacers 16in. that they are narrower and. rest on thesurfacehofithe. roll body, whereasthe segment spacers. l 6 seat in the grooves l 3. Fig.4..) the spacers: l6 and .2 l, assuch bars. extend out- (See warclly'beyond the spacers to form the cell pack-- etsifor'thestock.beingtreated.v (See Fig. 1.)

torproject beyond the spacers to form thecell pockets. Howeven insteadzof using cutting bars:

which are-1%" thick; I.mayuseiother bar thicknesses, as for example A" or 4;, with the same spacers, and .vary the-number of bars in. each segment to: compensatezfor the :change in thickness,

and'utilizeth'esize of the final ifitted. spacer inv each: segment to compensate for irregularities in spacing; Of course, .it will .beunderstood .that' with woodenspacers,swelling takes care of minor variations in thickness.

The remainingxsegmentsrare filledzini the manner above. described; When this operation is completed, the'hook :members' 19' inv the cutting bars '20 andxspacers l6'and 2|, come into alignment; andprovide al'continuou groove 22 'on'th'e endfa'ce of the assembly;

23 designates holding members-of which there areieigh 't equallyspaced about and on each end ofthez assembly: These holdin members 23' are provided 'on'theiri innersurface, top and bottom, witharcuate'proiections 24 and 25 respectively. The arcuate projections 24'seat in the grooves 22Lform'edin' the'endsofthe spacers and'cutting bars; and the arcuate projections 25 seat in -a' circular' groove 26 formed in the-end of the rollb'ody"! I. The holding members'are driven and securely anchored inplace by a series of fiat head-machine screws" 21 screwing into the roll body'l I.

A renewable and removable wearing plate 28" terpose a suitable gasket between the ends of'the bars and spacers'and 'theinner'face of the'holding members 23.

After the beater roll is installed in abeater, and should itbecome necessary to replace the filling of bars and spacers, or to renew damaged cutting bars, the attendant need only remove the'hood Also the "cuttin'gbars 20 are wider than or curb from the beater, remove that segment of the wearing plate 28 and holding member 23 which are adjacent to the section holding the parts to be removed, remove the final fitted spacer in such segment, whereupon each bar and spacer may be easily driven back from beneath the band or ring M. The damaged bar or spacer, or each or all of them in a segment can then be replaced and a fitted wedge spacer driven to securely lock the elements in position. The same procedure would follow for the complete roll if entire renewal is necessary.

The spacers,preferably of metal, need not be renewed, but can be used over and over with the exception of the one fitted spacer, and the last to be installed in a segment. For ease in fitting, particularly on the job, this spacer may be made of some fibrous material and preferably of a non= splinterable wood; indeed, in some installations it may be preferable to use a majority of wooden spacers.

Having thus described my invention, what I claim as new is:

1. In a beater roll, the combination of a shaft, a roll body having a machined surface of a predetermined radius mounted thereon for rotation therewith and having a plurality of grooves extending longitudinally thereof and dividing the surface of the body into segments, locking rings secured to the surface of the body and spaced along the length thereof, segment separating spacers seating in said groove and locked to the body by the locking rings, and a filling for each of the segments comprising a plurality of intermediate spacers and cutter bars arranged alternately in the segment, locked to the locking ring, and with their lower ends in engagement with the surface of the roll body.

2. In a beater roll, the combination of a shaft, a. cylindrical roll body having a machine surface of a predetermined radius mounted thereon for rotation therewith, and having a plurality of rooves extending longitudinally thereof parallel to the shaft and dividing the surface of the body into segments, locking rings secured to the surface of the body and spaced parallel to each other along the length thereof, segment separating spacers having their lower edges seating in said longitudinal grooves and with the body of said spacers extending radially outward from the roll body, said spacers locked to the roll body by the locking rings, a filling for the segments comprisin a plurality of intermediate spacers and cutter bars alternately arranged in the segments, locked to the roll body, and with their lower edges in engagement with the surface of the roll body, there being a circular groove formed in the end of the roll body and a circular groove, concentric with said first-named groove formed in the end of the spacers and cutting bars, and a segmental covering for the end of the spacers and cutting bars secured to the end of the roll body.

3. In a beater roll, the combination of a shaft, a cylindrical roll body having a machined surface of a predetermined radius mounted thereon for rotation therewith, and having a plurality of grooves extending longitudinally thereof parallel to the shaft and dividin the surface of the body into segments, locking rings secured to the surface of the body and spaced parallel to each other along the length thereof, segment separating spacers having their lower edges seating in said longitudinal grooves and with the body of said spacers extending radially outward from the roll body, said spacers locked to the roll bo y by the locking rings, a filling for the segments comprising a plurality of intermediate spacers and cutter bars alternately arranged in the segments, locked to the roll body, and with their lower edges in engagement with the surface of the roll body, there being a circular groove formed in the end of the roll body and a circular groove, concentric with said first-named groove formed in the end of the spacers and cutting bars, and a covering for the end of the spacers and cutting bars comprising segments each having arcuate projections on their inner surface, top and bottom, the top projection fitting into the circular groove formed in the end spacers and cutting bars, and the bottom projection fitting into the circular groove formed in the end of the roll body, and means for securing said segments to the roll body.

4. A beater roll comprising a cylindrical body having a machined surface of a predetermined radius, walls forming a plurality of grooves in said surface, said grooves extending longitudinally of said body and being spaced to divide said surface into equal segments, a plurality of retaining rings secured to the surface of said body, a flange on said rings defining a hook portion for said rings outward of said surface, machined steel segment spacers adapted to fit in said grooves and being notched on their inner margins to define hook portions therein complementary in shape to the hook portions defined by said rings, said segment spacers being retained by said rings with said hook portions of both interlocking, cutter bars and bar spacers adapted to abut the machined surface of the body throughout its length and being notched on their inner margins to define hook portions complementary in shape to the hook portions defined by said rings, said cutter bars and said bar spacers being arranged alternately between said segment spacers, and being retained by said ring with the hook portions of the said bars and bar spacers interlocking with the hook portions of said rings, and a plurality of segmental holding members secured to each end of said body, said holding members each adapted to abut the ends of said cutter bars, bar spacers, and segment spacers and to retain the same, and said holding members each covering only the space of a single segment.

FRANK HAYES.

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

UNITED STATES PATENTS Number Name Date 1,185,926 North June 6, 1916 1,506,133 Peterson Aug. 26, 1924 1,838,875 Shartle Dec. 29, 1931 2,008,228 Riehm July 16, 1935 2,324,845 Jones July 20, 1943 FOREIGN PATENTS Number 4 Country Date 5,018 Great Britain of 1880 469,551 Great Britain July 2'7, 1937

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