US2208316A - Breaker roll - Google Patents

Description

July 16, 1940. J. BAXTER, JR 2,208,316

BREAKER ROLL V Fil ed Jan. 13, 1957 LEN- ,. A 2 4 I/II INVENTOR M ra ATTORN EY Patented July 16, 1940 PATENT OFFICE BREAKER. ROLL Joseph Baxter, Jr., Franklin, Ohio, allignor to The Black-Olawson Company, Hamilton, Ohio,

a corporation of Ohio Application January 13, 1937, Serial No. 120,8

11 Claims.

This invention relates to paper making machinery and more particularly to breaker or beater rolls for working paper stock or the like, the present application being a continuation in part 5 of my prior application entitled Breaker roll, Se-

rial No. 664,881, filed April '1, 1933.

One object of the invention is the provision of a breaker roll or the like which is of simple construction, which possesses great strength without excessive bulk, is durable, and which is economically produced by the permanent assembly or fabrication of commercially available materials.

Another object of the invention is the provision of abreaker roll which is of all steel construction, and in which the several parts are permanently welded together into a single integral structure.

Another object of the invention is the provision of a breaker roll or the like having end plates, fly bars and spacer members all welded together and providing a sealed chamber within the roll so that water and pulp cannot find their way into the roll interior.

Another object of the invention is the provision of a breaker roll or the like having fly bars which are welded rigidly and permanently in place on the end plates, the fly bars being provided with detachable wear members which can be readily removed and replaced when worn.

" .Other objects and advantages of the invention will be apparent from the following description, the accompanying drawing and the appended claims.

In the drawing, which discloses preferred em- 35 bodiments of the invention- Fig. 1 is a plan view, partly in section, of a breaker roll constructed in accordance with this invention;

Fig. 2 is an end view of Fig. 1 with some parts broken away for clearness of illustration;

' Fig. 3 is a fragmentary view taken similarly to Fig. 1 and showing a modified construction;

Fig. 4 is a section on the line 4-4 of Fig. 3; and

Fig. 5 is a section on the line 5- -5 of Fig. 3.

Breaker rolls or the like such as are used in beating, breaking up or pulping paper stock in the manufacture of paper pulp have heretofore been so constructed that the'fly bars, or beater bars, are detachably held on a rotatable drum like support with removable spacers between the fly bars, the spacers servingto hold the fly bars in place and in their proper spaced relation. Such spacers have therefore been so madeas to accurately fit the sides of the -fly bars, requiring the opposite sides of the spacers to be made with the necessary (Cl. 9H2) slope and requiring the spacers to be of an exact size in order to flrmly secure all of the fly bars in place. In a construction such as this it will be apparent that the various parts must be accurately and carefully made or the fly bars will 5 not be rigidly held, and if the fly bars become loosened great damage may be caused by striking against other machine parts with which the beater roll cooperates.

The present invention represents a radical de- 10 parture from the prior constructions of breaker or beater rolls. As herein set forth, the breaker or beater roll is fabricated into an integral structure from readily available material. Fly bars which extend in a generally radial direction are welded directly to spaced end plates of steel or the like, which are securely attached, preferably by welding, to a central shaft. Filler pieces, of a proper shape to be received between adjacent fly bars, are also welded to the end plates and to the fly bars. Thus the various parts of the roll are all of simple form and the roll may be cheaply and quickly made with little machining.

The structure thus formed is very rigid and durable and the loosening or displacement of the component parts in service is impossible.

Referring more particularly to the drawing by reference numerals l0 designates a central steel carrying shaft which may have a diameter of the order of ten inches in a large roll. On the shaft are axially spaced annularly extending end members of plates II which serve as the support for the fly bars l2.

The end members ll stand perpendicularly to the shaft and, as shown, are permanently attached thereto by welding as indicated at I4. To facilitate the welding of the end members H to the shaft, the latter is provided, for each end member, with an outwardly extending flange the peripheral portion of which is welded to the inner edge of the end member. Thus the heating of a large amount of metal on the shaft body during the welding operation is unnecessary, the heat being rather localized in only the flanged portion. The fly bars l2 extend radially between the end members II and are attached permanently in position by welding. These bars, like the other parts of the roll structure, are made from commercially available stock steel or the like in such form that butlittle work is necessary to prepare the parts for use. In the case of the fly bars, which may be made in the construction shown in Fig. 1 from a steel having high resistance to wear, it is only necessary to cut them from flat bar stock to a proper length and finish the ends for engagement with the roll end members.

The spaces between adjacent fly bars II are closed at a suitable distance from the roll periphery by filler members 15 which are formed of steel plate. plates as indicated or they may be curved sections. They are attached to the roll ends and to the fly bars by welds as indicated at l6. An additional support for the fly bars may beprovided by an intermediate member it which is shown intermediate the end member II. The shaft, adjacent its point of connection to the intermediate member i8 is provided with a flange 23 which projects out from the main body portion of the shaft far enough to prevent the, heat of the weld from substantially afiecting the character of the steel in the body portion of the. shaft, during the welding'operation. The member 18 is welded to the peripheral portion of this flange. The periphery of the intermediate member I8 is shaped to conform to the positioning of the filler members l and, as shown, it is notched at 2D to receive the inner edges of thebars I! which extend inwardly of the point of attachment of the filler members to the bars. The intermediate member 18 and the bars l2 are welded together where they on sleeves 26 of a suitable material to serve for engagement with the packing at the sides of the tub within which the roll operates. Roll end portions 21 are finished for mounting within bearings, and for the attachment of driving means.

Each end member may be constructed of one or a plurality of plates. In the form of construc-- tion shown in Figs. 1 and 2 the end members II are each made up of two adjacently related plates 29 and 33. The end plates 29, which lie toward the center of the roll, may be notched as indi-- cated at 30 to the full depth of the fly bars I2 and thus serve. as a means of firmly locating the fly bars in the assembly. 'I'heouter plates 33 may be constructed as plain discs which are attached to the outer sides of the plates 29 in which case the bars l2 terminate flush with the outer faces of the plates 23. 'As shown, the bar ends are formed so that they have projecting end portions 3| of a width substantially half of the total depth of the bars l2, and extending beyond the plates 29 an amount equal to the thickness of the outer end plates 33. Also, the outer end plates 33 have openings 34 within which the bar extensions 3| are received. The outer plates 33 thus serve as additional anchorage'for the fly bars and add to the strength of the unit. Bangor irons 35 may be attached, as shown, preferably by welding, to the outer sides of the end members II.

The general arrangement of parts shown in Fig. 3 is similar to the showing of Fig. 1 except that the fly bars I! terminate at the inner faces of the end members II. A single end plate may be used at each end of the roll, as shown in Fig.

These filler pieces may be flat -mounted'on the outer plates ll'.

3, welded to a finished portion 24f on the periphery of a flange on the shaft Ill. The plates I I at the end of the roll with the intermediate member l8, which is welded to a flange at the center of the shaft, serve to support the fly bars and the filler plates l5 rigidly and permanently by welded connections along'the various lines of contact.

The ends of the fly bars thus have a welded connection extending along their lines of engagement with the plates H, and welded connections extending along their lines of engagement with the filler plates l5. Bangor irons 35' are shown These bangor irons are welded to the plates.

As the fly bars l2 may, after some period of continued use, become worn and somewhat rounded or blunt at the forward edges of the bars and thus losesomeof their efficiency as breaker members, they may be provided with removable wear members, retaining the advantages of an integral roll construction, for the most part, but giving theadded advantage of permitting replacement of the wear members. These wear members are shown in Figs. 3 and 5 as flat steel plates bolted to the forward sides of the fly bars and having a length substantially equal to the fly bar length. The outer edges of the wear members, to which the reference numeral 38 has been applied, project a little distance beyond the outer ends of the fly bars so that all the wear is applied to the wear members. The connection between the wear members and the fly bars is such that the wear members can be readily re moved without affecting the unitary attachment between the shaft, the fly bars, the end plates and the filler members. This connection moreover'is such that the wear members can be turned end for end in order that the edge of the wear members which become dulled after a period of time may be reversed with another edge of the member. With the symmetrical arrangement of the holes 39 in the wear members and in the fly bars, the wear members can be turned upside down as well as end for end in orderto give four edges which can be used successively.

On the side plate II as shown in Fig. 3, the bangor iron is welded at an end of the roll for cooperation with the tank sides. This bangor iron is preferably an angle iron 07' Jar having a removable wear plate 40 connected to it by rivets or bolts in a detachable manner. As shown the connection is by means of countersunk screws 4|. The outer edge of the bangor'ironwear member projects a little beyond theouter end of the angle iron and assumes all of the wear during operation. The wearing surface of the bangor iron is thus readily replaceable although the advantages of the inner integral connection between the bangor iron and the end plates of the beater roll are retained.

In accordance with the present invention, the breaker or beater roll in which the fly bars and spacer plates are welded along their lines of connection with one another and with the end plates of the roll provides a construction in which the weight of the roll is more or less concentrated nearthe roll periphery so that the momentum of the roll is large. Moreover with the various parts welded together the interior of the roll is a sealed chamber into which water and pulp can find no entrance. In the prior constructions the interior of the rolls are rapidly filled or partially filled with water or pulp and it is necessary therefore to supply the roll with suflicient power to overcome the stopping effect of the liquid which it contains. Moreover in accordance with the present invention the roll possesses great strength in that all of the parts are jointed to form a rigid integral assembly. The roll is readily fabricated, as the individual parts that constitute the assembly are readily available in materials that can be prepared for use with but a, relatively small expenditure for labor. As the roll body-is of integral construction no attention will be required, and no damage can result from parts becoming loosened in service during the entire life of the roll. The roll of the present invention in which the edges of the fly bars themselves are effective in breaking the material treated possesses additional operating savings over that obtained in the use of other breaker rolls in that it can be produced so economically that it may be discarded when it has finally worn out in service, and when the fly bars are equipped with removable wear members the latter can be very readily removed and replaced when worn, or may be merely changed by reversing end for end to bring an unworn surface edge into use.

While the forms of apparatus herein described constitute preferred embodiments of the invention, it is to be understood that the invention is not limited to these precise forms of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

l. A breaker roll comprising a shaft, fly bar supporting means comprising spaced disk like members perpendicularly related to and permanently attached to said shaft, said members having peripheral notches therein, radial fly bars positioned within said notches and extending between said members, said fly bars being positioned so that the outer edges thereof lie substantially flush with the periphery of said members, and having end extensions of radial width less than the fly bar depth extending beyond the notched supporting members, and a disk like member attached exteriorly of each of said first mentioned members and having openings therein for interengagement with the fly bar extensions.

2. A breaker roll comprising a shaft, axially spaced end plates welded to said shaft, radially extending flat fly bars positioned between said plates and welded thereto, the outer edges of said fly bars being located substantially flush with the periphery of said plates, and a filler plate positioned between each pair of bars and welded to said end plates and to the adjacent sides of each supporting means comprising axially spaced disk like members perpendicularly related to and permanently attached to said shaft, said members having annularly spaced openings therein radially positioned with respect to said shaft and adjacent the peripheries of said members, fly bars extending between said disk like members, said fly bars being positioned so thatthe outer edges thereof lie substantially flush with the periphery of said members, and said fly bars having end extensions interfltting said disk like members at the openings therein.

4. A breaker roll of the character described for use in paper making comprising a shaft, said shaft having flanges extending outwardly from the shaft a distance commensurate with the width of the flanges to prevent rapid loss of welding heat applied to the peripheral portions of the flanges, axially spaced annularly extending fly bar supporting plates having a thickness commensurate with the width of said flanges, the inner portions of said plates having a welded connection to the peripheral surfaces of said flanges, radially extending flat fly bars positioned between said plates with their ends engaging said plates and with the peripheral portions of said bars being substantially flush with the peripheries of said plates, welded connections between said plates and fly bars, said welded connections extending along the ends of the fly bars to the outer edge thereof, and a flller plate positioned between each pair of fly bars and having welded connections to said supporting plates and having welded connections extending along their lines of engagement with said fly bars.

5. A breaker roll of the character described for use in paper making comprising a shaft, axially spaced annularly extending supporting plates on said shaft, fly bars extending between said plates and having welded connections along substantially radial lines of engagement with said plates. said fly bars having their outer ends substantially flush with the peripheries of said plates and said welded connections extending to the outer ends of the fly bars and the plates, said fly bars having bolt holes therein symmetrically spaced on opposite sides of a central plane extending transversely through the shaft axis, removable wear members having bolt holes adapted for cooperation with the holes in the fly bars for attachment of said wear members in any of a plurality of reversed positions with the outer edges of the wear members projecting beyond the outer edges of the fly bars, and bolts extending through said holes and connecting said wear members and fly bars.

6. A breaker roll of the character described for use in paper making comprising a shaft, axially spaced annularly extending supporting plates on said shaft, fly bars extending between said plates and having welded connections along their lines of engagement with said plates, said fly bars having their outer ends substantially flush with the peripheries of said plates and said welded connections extending to the outer ends of the plates and the outer ends of the fly bars, said fly bars having bolt holes therein symmetrically spaced on opposite sides of a central plane extending transversely through the shaft axis, removable wear members having bolt holes adapted for cooperation with the holes in the fly bars for attachment of said wear members in any of a plurality of reversed positions with the outer edges of the wear members projecting beyond the outer edges of the fly bars, bolts extending through said holes and connecting said wear members and fly bars, and a filler plate extending between each pair of fly bars and having welded connections to said supporting plates and having, welded connections extending along their lines of engagement with said fly bars.

'7. A breaker roll of the character described for use in paper making comprising a shaft, axially spaced annularly extending supporting plates on said shaft, fly bars extending between said plates and having welded connections along their lines of engagement with said plates, said fly bars having their outer ends substantially flush with the peripheries of said plates and said welded connections extending to the outer ends of the plates and the outer ends of the fly bars, said fly bars having bolt holes therein symmetrically spaced on oppositesdies of a central plane extending transversely through the shaft axis, removable wear members having bolt holes positioned for cooperation with the holes in the fly bars, the holes in the wear members having a symmetrical spacing on opposite sides of the longitudinal axis of each wear member for attachment of said wear members in any of four reversed positions with the outer edges of the wear members projecting beyond the outer edges of the fly bars, and bolts extending through said holes and connecting said wear members and fly bars.

8. A breaker roll of the character described for use in paper making comprising a shaft, axially spaced fly bar supporting plates having welded connections to said shaft; fly bars extending between said plates and welded thereto along their lines of engagement therewith, said fly bars having their outer ends substantially flush with the rims of said plates and said welded connections extending to the outer ends of the plates and to the outer ends of the fly bars, filler members extending between said plates and each pair of adjacent fly bars and welded to said plates and having welded connections along their lines of engagement with said fly bars to connect the same rigidly in a permanently joined sealed hollow assembly, wear members detachably bolted to said fly bars and projecting beyond the outer edges of the fly bars, a substantially radially extending bangor bar having a permanent welded connection on one of said plates, and a wear member detachably bolted to said bangor bar and projecting in the direction of the shaft axis from said banger bar.

9. A breaker roll of the character described for use in paper making comprising a shaft, axially spaced disk-like fly bar supporting plates on said shaft, fly bars extending between said plates with their outer ends substantially flush with the peripheries of the plates said fly bars and supporting plates having an abutting engagement along substantially radial lines, and a'substantially flat metal filler plate extending between the supporting plates and each pair of adjacent fly bars with lines of abutting engagement with the supporting plates and the fly bars, said supporting plates, fly bars, and flller plates having rigid weld connections to one another with welded connections extending outwardly to the outer edges of the fly bars along the lines of engagement of the ends of the fly bars with the supporting plates and with welded connections extending along the lines of engagement of the A fly bars with the flller plates and with welded connections between the filler plates and the supporting plates.

10. A breaker roll of the character described for use in paper making and fabricated from parts permanently interconnected into a single integral construction, comprising a shaft, spaced disk-like fly bar supporting end members perpendicularly related to said shaft and permanently welded thereon, fly bars extending between said end members and permanently attached thereto by welded connections extending outwardly along the lines of engagement of the fly bars with the end members, the outer edges of the fly bars being substantially flush with the end plate rims, a disk-like fly bar support permanently welded to said shaft between the end members, said support having peripheral notches receiving said fly bars and permanently attached thereto, and substantially flat filler plates positioned exteriorly of the intermediate support and extending between and abutting against the end members and having welded lines of connections to the end members, each flller, plate abutting against adjacently related fly bars with welded lines of connection therewith and providing a roll closure of less diameter than the roll diameter.

11. A breaker roll of the character described for use in paper making comprising a shaft, axially spaced annularly extending fly bar supporting plates on said shaft, fly bars extending between said plateswith the outer ends of the fly bars substantially flush with the outer rims of the plates, welded connections extending along the lines of engagement of the fly bars with the plates and extending to the outer ends of the plates, and a substantially flat metal flller plate extending between and abutting directly with the supporting plates between each pair of adjacent fly bars, said filler plates having welded connections along their various lines of contact with the fly bars and with the supporting plates and providing a sealed chamber within the supporting plates and filler plates.

JOSEPH BAXTER, JR.

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