US2146791A - Roll for jordan type paper pulp refiners - Google Patents

Description

Feb. 14, 939. A E. BR|DGE 2,146,79

ROLL FOR JORDAN TYPE PAPER PULP REFINERS Filed June 22, 1956 2 Sheets-Sheet l Feb. 14, 1939. A. E. BRIDGE ROLL FOR JORDAN TYPE PAPER PULP REFINERS Filed June 22, 1936 2 Sheets-Sheet 2 v v Y ll readily moved within the slots until their nal one another. The knives and knife separators V10 40 Fig- 3 iS a longitudinal Sectional vieW through and although they could extend out rearwardly 40 Patented Feb. 14, 1939- i Y -r 2,146,791

' UNITED STATES PATENT- OFFICE ROLL FOR JORDAN TYPE PAPER PULP REFINERS Adam E. Bridge, Franklin, Ohio, assignor to The Black-Clawson Company, Hamilton, Ohio, a. corporation of Ohio Application June 22, 1936, serial No. 86,446

s Claims. (01.92-2'1) This invention relates to peper making mabody, which is frequently or a misto-conical chineS and more particularly to rotatable rolls form, carries a series of knives which cooperatev Such aS Jordan engine plugs and the like. with another series of ilxed knives that are pro- One object of theinvention iS the provision of vided on the interior of an outer housing body 5 a knife holding member, such as a Jordan engine within which' the plug is rotatably supported., `5 plug in Which a body member iS provided With the outer body being of the same frusto-conical longitudinally extending slots which interiit with shape as the plug, and the knives on the plug and receive the inwardly converging sides of and outer body operating with a suitable clearknives or bars, the latter being adapted to be ance so as to be just out of running contact with Seating engagement takes place. y which are provided between adjacent knives are Another object of the invention iS the proViusually constructed as separate pieces assembled sion of a roll in which the bars are tightly tted to the conical body. in the Slots at the outer periphery of the roll. In accordance with the present invention there l5 Another object of the'invention iS the proviis provision for very securely anchoring inwardly 15 sion of a roll of the character mentioned having tapering portions of the knives in longitudinally slots the sides of which converge inwardly, bands extending slots provided in the frusto-conical encircling the body being adapted for Wedging plug body, the latter being provided, in accord- -engagement With the knives. Which are in turn ance with a preferred embodiment of the invenso shaped as to provide a Wedging engagement tion, with a plurality of annuiarly extending 2o with the roll body. knife retaining means or bands which are adapt- Another object of the invention is the provied for cooperation with suitable tongues andre- Sion of a Jordan engine plug 0I' the like having cesses on Vthe innerportions of the knives. The a series of longitudinally extending knives or bars latter4 are secured in position by a. movement tos removably Seated in a Supporting body in outward the plug axis and then by a longitudinal or wardly extending Slots which are rounded to proendwise movement along the slots, to a limited vide unusual strength at the base of the lugs beextent, as will be more fully described. tween slots, the knives intertting with the body The Jordan plug I0 comprises a frusto-conical aS to provide an assemblage Which iS maintained shell or body Il, preferably of cast iron or other in a Secure manner throughout very long periods suitable material, having a series of longitudinally 30 of use. extending slots I2 in which the knives or bars i4 Other objects and advantages of the invention are held, AS the circumference of the plug is Will be apparent from the following deScIiption, considerably greater at its larger end, additional the appended claims and the accompanying shorter slots are preferably provided at the larger drawings, in Which- "1d of the plug; as shown in Fig. 1, to accommo- 35 Fig. 1 is a side elevation of a Jordan engine date a number of additional shorter kniveswhich plug embodying the present invention; at this end of the plug alternate with the long Fig. 2 iS a Side elevation of a portion of one knives I4. The slots extend inwardly from the of the knives or bars of the plug: outer frusto-conical surface I3-of the body Il,

the outer portion of the plug taken at one side of at asuitable angle to the radial, it is preferred One Of the knives as indicated 'by the line 3-3 that they extend radially, as shown. The inner of Fig. 4; terminal parts of the slots are formedso as to Fig- 4'iS a Section on the line dof Fig. 3; be devoid of any sharp angles at the inner side Fig. 5 iS an enlarged Sectional View correspondo corners or, in other words, at the inner ends of 45 ing to Fig. 4; and the flat bar contacting sides where the slots are Figs. 6, 7, and 8 ShOW a modified form of conpreferably rounded or curved as shown at l5. struction, Figs. 6 and 8 being transverse sectional This gives an increased strength for the base of vieWS through-the portion of the Jordan engine the lugs I6 which project from the main body plug shown in Fig. 7 and taken on the lines 6--6 portion of the roll between adjacent knives. This 50 and 8-3 respectively. increase of strength is due to the elimination of Referring more particularly to the drawings by the sharp corners which are customarily present reference numerals, Ill designates generally the as in a flat bottom slot, these sharp corners plug of a paper pulp refining unit such as a J orhaving a weakening effect at the very point where dan engine or the like.` In such units the plug the increased strength is desired. The increase 55 of the strength at the base ofithe lugs is also due to the increased distance across the base of the lugs by reason of the fact that the inner portions of the slots curve towards the center of the slot. 5 As will be apparent, the width of the slot near the bottom of the slot is no greater than the width of the radially outer portions of the slot so that the width of the lug at its outside is large enough to permit the knives to be assembled by l a movement which is generally toward the roll axis. Furthermore, in accordance with the preferred form of the invention, the sides of each of the slots I2 preferably converge inwardly at an angle of v a few degrees towards one another l5 as shown in Fig. 5 of the drawings so that a still greater lug width at the base of the lug is provided for. 'Ihe inwardly converging cross-sec# tional shape of the slots combined with the curved formation of the inner terminal portions of the slots give a very strong construction at the base of the lugs I6'. The curved formation of the inner terminal portions of the slots provide that the base portion of the lugs, at different distances inwardly toward the axis of the body member shall increase in width at a rapid rate from the point where the curvestarts to a maximum width which is at the same distance from the axis of the body member as the innermost portions of the slots, thus giving the maximum lug width adjacent the very innermost portions of the slots.

The outer surface of the body II is cut away so as to provide a plurality of annular surface indentations I6 in the same manner as in the prior application of H. D. Martindale, Serial No. 27,727 filed June 21, 1935, these surface indentations extending outwardly and preferably cylindrically toward the smaller end of the plug, the inner end of eac surface indentation providing a shoulder I1. V.Seated on orin each of the surface indentations is an annular knife retaining band IB, each abuttingagainst a shoulder I1, and of such size as to lie entirely below the cone defined by the outer surface I3 of the plug body. 'I'he several bands are, of course, of graduated diameters, and their inner surfaces are preferably substantially cylindrical so that they can be readily applied merely by moving them endwise towards the larger end of the plug, sliding along the cylin- 5o drical indentations I6 until they come up against 60 by extending portions-underlying parts of the recesses, these, tongues having wedging surfaces 23 that extend at a slight angle to the inner edge of the'knife so as to provide a wedging engagement with the inner sides of the bands i8' as the 55 knives are moved toward the larger end of the I plug after being inserted in the slots. It will thus be understood-that when the knife is moved endwise towards the larger end of the plug the wedging action that takes place between the tongues 70 22 of the knife `and the bands i8 forces the knife inwardly towards the axis of the plug. And since the sides of the slots converge inwardly at a slight angle, with the sides of the knives also arranged at a corresponding angle, it will be clear that the 75 final seating action of a knife in a Slot takes place in a wedging manner, the parts being tightened up firmly in their final seating movements. However, before this final seating movement of a knife in a slot it will be apparent that the knife can move freely in a longitudinal direction with- 5 out binding in any way on the sides of the slot. As indicated in Fig. 5, there is suicient clearance provided between the inner ends of the knives and the inner ends I5 of the slots so that these portions are out of contact in order'to provide a firm 10 engagement of the sides of the knife with the sides of the slot at their outer portions so as to prevent any looseness or movement when the knives are assembled.

The normal operating force on the knives, dur- 15 ing operation, tends to move them toward the larger end of the shell and thus tends to tighten them in the slots. Additional means is preferably provided to hold the knives in their final assembled positions, such as a ring 25 assembled by 20 shrinking it on the smaller end of the shell at the ends of the knives.

The knives I4 are seated in the slots throughout a very considerable portion of their radial depth, the slots I2 having a depth several times 25 their width. The knife thickness or slot width may be from three-sixteenths of aninch to onehalf inch or of that order. As shown, somewhat in excess of one-third of the knives are seated in the slots below the conical surface I3 of the plug 30 body. Moreover nearly the entire length of the knife is in effective abutting contact with the sides of the slots so that a very large total area of contact is provided between the knife and the body, giving` a very firm holding action on the knives. The knives are preferably rigidifled still further by means of filler pieces or woods 26 which are provided with grooves 21 adapted to receive longitudinal surface irregularities or projections 28 on the knives, so that the woods, which 40.

are driven in endwise from the larger end of the plug, are securely held against any radial outward movement during operation. Since the knives are held against any looseness or movement the woods will be maintained tight. The radial depth of the woods yis preferably about the same as the slot depth but as the sides of a knife are parallel, see Fig. 5, where it projects from a slot (except for the surface irregularities 28) the sides of the woods are fiat and the wood thickness can readily be made of any suitable extent to'give the desired space between knives outwardly of the woods. A suitable end plate 29 on the larger end of the plugmay be employed to hold the woods against longitudinal movement. As shown in Fig. 5, the

over the construction of the plug body itself is e5 very greatly strengthened because of the slot form and the manner in which the knives are arranged in the slots. 'I'his increase in strength of the roll body has been found to be 40% or more in excess of the strength of usual constructions in which the present improvements are not utilized, the strength improvement being especially noticeable at the base of the lugs between which the knives are held, as it is at those points that breakages would otherwise be apt to occur. This possible in the usual slots having parallel sides.

the outwardly projecting1 portions 36 of the plug breakage of the plug at the base of the lugs has been a. fault of the usual plug construction having the usual ilat bottom slot, as the right angle corner of the slot is then at the point of minimum lug width at the base ,of the lug.

With the inner portions of the sides of the knives inclined as above' mentioned, the knives may be made of rolled steel in spite of the fact that the thickness of such commercial stock may vary several thousandths of an inch, and the plug body may be made of cast iron, and the construction will have adequate strength as well as providing unusual ease in assembly and disassembly of the parts. As the seating movement of a knife in a slot takes place only during its final movement through a small part of an inch there will be no substantial breaching action of the sides of the knives or slots where they engage with one another. Wear produced by a broaching action would make the slots roomier each time the knives are assembled and disassembled, and this is prevented in accordance with the construction of this invention, so that the knives will always be fitted tightly in the slot at the outer periphery of the plug. If there is any wear of the slots or knives the latter will merely seat themselves a little deeper and maintain a tight fit. As will be apparent this is im- And as will be quite apparent the removal of a bar can be readily accomplished, as a very small movement of the bar in a longitudinal direction loosens the bar from theA slot, in spite of any rusting action that may have taken place, so that the bar can then be very readily moved still further in a longitudinal direction and 'then entirely withdrawn from the slot by an outward movement, thus saving time and avoiding the danger of breaking the lugs that exists where the slots and knives are of the'customary form and where the knives must befdriven out after rusting.

Various modications may bef' made in accordance with this invention. Foi example as shown in Figs. 6, 7 'and 8, the roll construction illustrated in those gures is one that employs knife receiving slots that are inwardly tapered and that have inner terminal portions so formed as to avoid the usual right angle corners, although in this form of construction the woods or spacers are held in a somewhat diierent manner. As shown in these igure's, the roll body 35 is provided with a series of spaced outwardly projecting portions 36, and these projecting portions 36 are longitudinally slotted as by means of the slots 3l the sides of which converge inwardly. The vinner ends of the slots could be pointed or wedge-shaped at the center but sharp angles at the inner terminal portion of the flat sides are avoided, preferably by curving or rounding those portions, as shown, so they will be entirely devoid of sharp angles or recesses. Each knife 38 is therefore supported at a series of spaced points along its length, the inner ends 40 of the knives having a clearance spacing from the outer conical surface 4I of the roll and from the bottoms of the slots so that the inwardly tapering portions of the knives are firmly seated along their tapering sides in the tapered slots. In this construction the knives are provided with recesses 42 and wedging tongues 43 cooperating with the bands 44 which encircle the plug body. The bands 44 are suitably secured to cylindrical surfaces provided on body.

In this form of construction the filler pieces 46, of suitable material but preferably of wood, are notched as indicated at 41 in Fig. 7 so as to receive the outwardly extending projecting portions 36 of the roll body. The inner portions of the wood spacers, which are assembled when dry, expand outwardly below the line 48 dening the inner extent of the parallel side portion of the knife, so as to fit against the tapered sides of the knives, and expand into slots 45 in the knives, and are also retained in place by additionalsuitable means such as a readily fusible metal skeleton 50 applied by pouring a suitable melted metal into small passages in the spacers 46, the latter and the knives having communicatcuring action provided as by pouring the melted metal as above mentioned.

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

What is claimed is:

1. A roll of the character described for paper machines comprising a rotatable body having an outer frusto-conical surface provided with an an-A nular series of radial slots in which the outer parts of the slot sides are at and relatively inclined so as to converge inwardly with the inner ends of the slots terminating in rounded surfaces so as to be devoid of sharp angles, 'a series of knives having their inner portions converging 'inwardly and tting in said slots with the radially inner ends of the knives having at least a clearance distance from the inner ends of the slots, said body having a plurality of annular surface indentations, a series of bands on said series of surface indentations with the inner surface of the bands spaced outwardly of the inside of the slots and with the outer sides of said bands located inwardly of the cone dened by the outer surface of said body, said knives having portions adapted for interlocking engagement with said bands to provide a wedging engagement of said knives and said slots in a radially inward direction, and spacers on the outer surface of saidbody and extending between adjacent knives.

2. A roll of the character described for paper machines comprising a rotatable body provided with an annular series of slots elongated in the direction of the vlength of the body member, the

sides of each slot converging inwardly from their the bottoms of the slots for tight engagement of the sides of the knives with the inwardly converging sides of the slots, and means adapted for interlocking wedglng engagement with said holding surfaces of the knives for holding saidv knives in said body.

3. A roll of the character described for paper machines comprising la rotatable body provided with an annular series of outwardly extending slots, the sides of each slot converging inwardly, a series of knives having side portions projecting from said slots and having inner portions converging inwardly and fitting in said slots, said knives having a length substantially equal to the length of the slot in which it fits and being adapted for assembly by movement inwardly into the body followed by relatively short longitudinal movement, the inner ends of the knives having at least a clearance distance from the bottoms of the slots, and means fitting into said knives for drawing said knives inwardly toward the central axis of said body as the knives are moved longitudinally.

4. A roll of the 'character described for paper machines comprising `a frusto-conical rotatable body provided with an annular series of outwardly extending slots which extend continuously the length of the body, the sides of each slot converging inwardly, a series of knives adapted for assembly by movement inwardly of the body followed by relatively short longitudinal movement and having their inner portions converging inwardly and seated in said slots, the seated portions of said knives being about one-` third the radial width of the knife, and means extending annularly on said body between the ends of the knives for pulling said knives inwardly in the body member into wedging engagement with the-converging sides of the slots as the knives are moved longitudinally.

5. A roll of the character described comprising a rotatable knife holding body extending continuously at the outer portion thereof from one end of the roll to the other and provided with a series of outwardly extending slots elongated in the direction of the length of the body member, the sides of each slot converging inwardly and the inner end of each slot being devoid of sharp corners at the sides thereof and having no greater width than any radially outer portion of the slot, a series of knives seated deeply in said slots and adapted for assembly by movement inwardly into the body followed by relatively short longitudinal movement, said knives having side portions projectlng outwardly from the surface of the bodywith the bottoms of th'e knives. throughout their length spaced from the bottoms of the slots, and means 'on said body member and in wedging engagement with said knives between the ends of the knives to force the same inwardly as the knives are moved longitudinally.

6. A roll of the character described comprising a rotatable body having an outer frusta-conical surface provided with an annular series of outwardly extending slots which extend throughout the length of the body, the outer parts of each slot being flat and relatively inclined so as to converge inwardly with the inner ends of the slots terminating in rounded surfaces so as to be devoid of sharp angles, a series of knives adapted for assembly by movement inwardly into the body followedby relatively short longitudinal movement, said knives having their inner portions'converging inwardly and fitting in said slots with at least a clearance-distance between the bottom of a knife and the bottom of a slot and with the thickness of the knife decreasing progressively inwardly from the portion of the knife adjacent the outer end of the slot, said body having a plurality of -annular surface indentations, a series of bands on said series of surface indentations with the inner surface of the bands spaced outwardly of .the inner sides of the slots and with the outer sides of said bands located inwardly of the cone defined by the outer surface ofsaid body, said knives having portions adapted for interlocking wedging engagement with said Abands to move the knives linwardly as theymove longitudinally.

' ADAM E. BRIDGE.

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