US1812812A - Suction roll - Google Patents

Description

E. T. STR EET June 30, 1931.

2 Sheets-Sheet 1 wdza/jgayz W ww sUcTIoN ROLL iled Oct. 24, 1929 June 30, 1931.

l E. T. STREET 1,812,812

SUCTION ROLL '2 Sheets-Sheet 2 Filed Oct. 24, 1929 w? E, ywfJgm-gwf Patented June 30, .1931

UNITED STATES PATENT OFFICE EDWARD TATUM STREET, 0F DOWN INGTOWN, PENNSYLVANIA, ASSIGNOR TO DOWN- INGTOWN MANUFACTURING COMPANY, 0F DOWNINGTOWN, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA SUGTION ROLL This invention relates to suction rolls of paper machines and more particularly to the mounting and control of theI packiiigs einployed in sealing the suction boxes of such rolls to the perforated shells thereof. As is well known to those familiar with the art, suction boxes of 'suction rolls ordinarily comprise a relatively stationary chamber disposed within the perforated shell forming the roll proper. This chamber is in communication with a source of suction through an axial prolongation or prolongations extending through the journals of theI shell. At its shell-engaging edges the chamber is provided with packing strips engaging the inner wall of the shell to guard against leakage between the inner wall of the shell and the box. Obviously some means must be provided for maintaining a good joint between the shell and box if leakage is to be prevented. Many attempts have been made to provide for an eicient adjustment of this packing, all of which, with which I am familiar, have been possessed of distinct disadvantages.

An important object o'f the present invention is the provision in a structure of this character of, an arrangement whereby the packings may be adjusted to insure their proper engagement with the shell and in which the adjustment of the packing may be effected while the roll is in operation.

A further object of the invention is the provision of a structure of this character which is so arranged that the packing may be removed at any time when the removal is desired without dismantling the roll.

A further object of the invention is to provide an arrangement of this character, the adjustment controls of which are. so disposed that the use of packing glands is eliminated to the greatest possible extent and in which at the saine time the operating controls proper are disposed exteriorly tothe suction box and, accordingly, so positioned that they are not subjected to deterioration which would result were they` interiorly disposed. i

These and other objects I attain by the construction shown in the. accompanying drawings wherein, for the purpose of illus- Application filed October 24, 1929. Serial No. 402,049.

tration, I have shown a preferred embodiment of my invention and wherein:

Fig. 1 is a longitudinal sectional View through a suction roll constructed in accordance with my invention;

Fig. 2 is a transverse sectional view through the suction box and the deckle taken on line 2 2 of Fig. 1;

3 is a side elevation of the deckle;

b Fig. 4 is an end elevation of the suction Fig. 5 is a transverse sectional view through the suction roll and box; and

Fig. 6 is a fragmentary side elevation of the suction box.

Referring now more particularly to the drawings, the numeral 10 generally designates a perforated shell having disposed at opposite ends thereof heads 11 equipped with tubular journals 12 and 13. Disposed within the shell Lis a suction box generally designated at 14, which box is provided at its ends with heads 15 equipped with tubular extensions 16 and 17 projecting into the journals 12 and 13 respectively and mounted in suitable bearings 18 supported from the heads 11 of the shell. In the present instance extension 16 is illustrated as projected through its journal l2 and is equipped with suction boxadjusting means 19 constructed in accordance with the showing of the copending application of Charles E. Conley, filed August 29. 1929, Serial No. 389,297 for suction roll, and with the exhaust manifold header 20. The extension 17 is disclosed as having its outer end plugged at 21.

The suction box 14 is in the forni of a U- shaped trough, of which the arms 22 have at their free ends sockets or grooves 23 for the reception of flexible packing strip retainers 24. Each groove 23 vis enlarged at a point below its mouth as at 25 and the packing retainer is provided with a. corresponding enlargement 26 projecting into the enlargement of the groove so that these retainers are held against radial movement to an extent permitting their engagement with the inner wall of shell 10. Pockets 27 are provided at intervals along the bottoms of grooves 23 and springs 28 ai'e arranged in these pockets SMR and abut the retainers to force them outwardly so that the packing strips 29 thereof will be maintained in engagement with the inner face of the shell. These pockets have arranged therein plungers 30 the stems of which extend through the bottom of the pocket at the outer surface of the arms 22. Heads 15 of the suction box close the ends of the U-shaped trough with the exception of openings provided in alignment with the tubular extensions 16 and 17 thereof and are each formed with a deckle slide 31. Each deckle comprises a retainer 32 having toothed engagement 33 with the walls of the slide providing its vertical displacement. The upper surface of this retainer has a transversely-extending rib 34 projecting into4 ders 37 seating upon the inner edges of the d packing retainers 24. It will be obvious that as the packing retainers 24 are fed outwardly the blocks 35 will likewise be fed outwardly so that the rubbers 38 thereof will be maintained in proper engagement with thewalls of the shell.

Arranged inwardly of and in slightly spaced relation to the head 15 is disposed a partition 39 closing ofi' a chamber 40 lying beneath the deckle guidel from the suction chamber 41 of the suction box. J ournaled in this partition is a shaft 42 which extends through the suction chamber 41, extension 16 and exhaust header 20. Within the compartment this shaft is equipped with an eccentric 43. Extending along the side walls 22 of the suction box at the exterior thereof and mounted in suitable bearings 44. Aare shafts 45 bearing cams 46 which correspond in number and arrangement to the plungei's 30 and each engaged with one of said plungers. These shafts have secured thereto links 47 which project through openings 48 in the arms 22 of the suction box and at their inner ends are connected by pitmen 4 9 with the eccentrics 43. The deckle adjustment for the deckle at this end of the roll comprises a screw 50 rotatably mounted upon shaft 42 and operated through a `tubular shaft 51 rotatablysurrounding shaft'42 and substantially co-extensive therewith. The deckle ad- 'ustment for the opposite end of the suction f ox includes a screw 52 rotatably surrounding the tubular shaft 51 and loperated through a tubular shaft 53 rotatably surrounding the shaft 51|and extending therealongthrough the `extension 16 header 20.

Shaft 53 has a bearing in the outer wall of the suction headers indicated at 54 and at the outer end of the bearing is equipped with an operating wheel Immediately outwardly of operating wheel 55 shaft 51 has secured thereto operating wheel 56 and the projecting end of shaft 42 has secured thereto a worm gear 57, through a bracket 58 secured t0 header 2O a Worm shaft 59 engaging the worm Oear 57. The deckle -yokes 60 are preferably connected to the deckles through shafts 61 which are rotatably mounted in the yokes and have threaded engagement in the retainers 32. The outer ends of these shafts are, through a screw slot 62 or the like, adapted for rotation so that these deckles through openings 63 formed in the heads 11 may be released for withdrawal through such openings. Retainers 24 are maintained in position through any suitable securing means. In the present instance the deckle guides are shown as having mounted in the outer ends thereof combined pivot and clamping screws 64 upon Jwhich are mounted segmental washers 65. When these washers are disposed with their major radii in alignment with the retainers 24 they overlapthe ends thereof and prevent endwise movement of these retainers and when the minor radius is aligned with the .retainers the ietainer may be removed endwise through its slot and through the opening 63.

Springs 28 are so proportioned that when plungers 30 are completely lowered they exert .no pressure upon the deckle strips and,

accordingly, by rotating shaft 42 through worm' 59 and worm gear 57 should cause rocking motion of shafts 45 and a release of the plungers. The retainers 24 may be free and may be readily removed for repair or replacement. By rotation of shaft 42 in the opposite direction the Ipressure applied to the retainers of springs 28 may be closely regulated and proper engagement at all tlmes insured. vIt will be noted that allof the operating mechanism for controlling the operation of the retainers 24 including shaft 42 is isolatedfrom the suction area and therefore so disposed that it is protected from the attacks of liquids and solids passing through the suction'box and is, accordingly, arranged so that a maximum elicient life therefor may be obtained. It will also be noted that this operating mechanism will not interfere Awith adjustment of the suction box or of the deckles in the usual manner.

It will be noted that in this construction riers is exposed to the suction created within the box with the result that the suction assists in urging the packing strips into engagement with the walls of the shell. This action renders the adjustment simpler and reduces the amount of force which must actually be imposed upon the packingl strips by the springs.

Since the construction employed is obviously capable of a considerable range of change and modification, without in any manner departing from the spirit of my invention, I do not wish to be understood as limiting myself thereto except as hereinafter claimed.

I claim:

1. In a suction roll, an outer rotatable shell having an inner relatively stationary suction box, said box including rigid arms, independently movable packing strip carriers carried by said arms and adjustable toward and away from the walls of the shell, a series of springs associated with the packing carrier of each arm and constantly urging said carriers toward the shell and a single means adjustable at the end of the roll for simultaneously adjusting the tension of both of said series of springs.

2. In a suction roll, an outer rotat-able shell having an inner relatively stationary suction box, said box including arms, packing strip carriers carried by said arms and adjustable toward and away from the walls of the shell, springs constantly urging said carriers toward the shell, means adjustable at the end of the roll for simultaneously adv justing the tension of said springs, deckles carried by the ends of the box and adjustable longitudinally of the box and packing strip carriers mounted upon said deckles and having engagement with the first-named packing strip carriers whereby they move therewith.

3. In a suction roll, an outer rotatable shell having an inner relatively stationary suction box, said box including arms, packing strip carriers carried by said arms and adjustable toward and away from the walls of the shell, springs constantly urging said carriers toward the shell, means adjust-able at the end of the roll for simultaneously adjusting the tension of said springs, deckles lcarried by the ends of the box and adjustable longitudinally of thel box, l packing strip carriers mounted/upon said deckles and having engagement with the first-named packing strip carriers whereby they move therewith, and means yfor independently adjusting the deckles concentric with the operating means of thelirst-named packing strip carriers.

4. In a suction roll, van outer rotatable shell, a box disposed interiorly of the shell having longitudinally-extending packing carriers adjustable toward the shell, deckles yadjustable longitudinally of the box and closing the space between the packing carriers vand concentric means for) controlling adjustment of the deckles and of said packing carriers.

5. In a suction roll, an outer rotatable shell, a suction box Within the shell having arms, independently movable packing carriers carried by said arms and adjustable toward the shell, springs isolated from the suction area of the box engaging the packing carriers for urging them toward the shell, a single shaft extending longitudinally of the shell and means operated by said shaft for simultaneously cont-rolling the pressure of the springs associated with said car-riers.

6. In a suction roll, an outer rotatable shell, a box within the shell and having arms, packing carrierscarried'by said arms and adjustable toward the shell, a shaft associated with each packing carrier, springs o-peratively interposed between each shaft and the associated packing carrier and adjusted as to pressure by rotation of said shafts and means for simultaneously rotating said shafts, said shaft, said springs and said means being isolated from the suction area.

7. In a suction roll, an outer rotatable shell, a suction box within the shell and having arms, packing carriers carried by said arms and adjustable toward the shell, a shaft exterior to the box associated with each packing carrier, springs isolated from the suction area operatively interposed betweenV the shaft and the associated packing carrier and adjusted as to pressure by rotation of said shafts, means extending through the suction box for simultaneously rotating said shafts, deckles extending between opposite ends of the packing carriers and moving therewith and means housing the last-named means within the suction box for adjusting the deckles longitudinally.

8. Inv a suction roll, an'outer rotatable shell, a box within the shell and having arms, packing carriers carried by said arms and adjustable toward the shell, a shaft associated with each packing carrier, springs operatively interposed between the shaft and the associated packing carrier and adjusted as to pressure by rotation of said shafts, means for? "simultaneously rotating said shafts, decklesiextending between opposite ends of the packing carriers and moving therewith and meansA for adjusting the vshell including elements exterior to the box andan operating element therefor extended through said journal, all of said elements beingisolated from the suction zone of the box. 5 i

10. In a suction roll, arotatable shell, a box 'arranged interiorly of the shell, packing strips carried by the box for engagement with the shell, springs for urging the packing strips toward the shell, means including elements exterior to the box and an operating element for the first-named elements extend-l ing longitudinally of the box and through `an end thereof for adjusting the tension of :said springs, all of said elements being isolated from the interior of the box.

11. In a suction roll, an outer rotatable shell, a box disposed interiorly of the -shell having longitudinally-extending packing carriers adjustable toward the shell, deckles adjustable longitudinally of the box and closing the space between the packing carriers and concentric means for controlling adjustment of the deckles and of said packing carriers, said adjusting means extending through an end of the shell and being operable during rotation of the shell.

12. In a suction roll, an outer rotatable shell having a hollow journal, a box within the shell, packings carried by the box for engagement `with the shell, springs isolated from the interior of the box operatively engaging the packings for urging them towards the shell, a shaft extending longitudinally of the box and through said hollow journal operatively engaging said springs to adjust the pressure thereof, and means isolating said shaft from the interior of the box.

13. In a suction roll,an outer rotatable shell, a box within the shell and having arms, packing carriers carried by said arms and adjustable toward the shell, a shaft associated with each packing carrier, springs operatively interposed between the shaft and the associated packing carrier and adjusted as to pressure by rotation ofsaid shafts and means for simultaneously rotating said shafts, a shell having a hollow, journal at one end thereof, the means for rotating said shafts extending through said journal.

14. In a suction roll, an outer .rotatable shell, a box within the shell and having arms, packing carriers carried by said arms and adjustable toward the shell, a shaft associated with each packing carrier, springs' operatively interposed between the shaft and tbe associated packing carrier and adjusted as to pressure by rotation of said shafts and means for simultaneously rotating' said shafts, including a third shaft extending longitudinally of and throughanend of the box and shell.

15. In a suction roll, an outer rotatable shell, a box within the shell and having arms, packing carriers carried by said arms and adjustable toward the shell, a shaft-associated with each packing carrier, springs operatively interposed between the shaft andthe associated packing carrier and adjusted as to pressure by rotation of said shafts, means for ,simultaneously rotating said shafts, including a third shaft extending longitudinally of and through an end of the box and shell, arms carried by the first-named shafts -and eccentric means operatively connecting said arms and the third shaft.

I 16. In a. suction box for suction rolls, a structure including spaced arms, each having a packing carrier mounted therein, a deckle guide between the arms, a deckle slidable upon the guide and having an upstanding rib on its upper face and a packing carrier mounted upon the deckle and having a groove to receive the rib of the deckle, the ends of said packing carrier being supported by the packing carriers of the arms.

17. In a suction box for suction rolls of paper machines, a structure including arms, each having a slot in its outer end, the slots opening through the ends of the arms, packing carriers slidable in said slots and removable therefrom through the ends thereof and rotatable means carried by the ends of the arms and in onel position thereof abutting the ends of the packing carriers to prevent longitudinal movement thereof and in a second position clearing said packing carriers to permit removal thereof.

18. A device as claimed in claim 12 wherein the box is provided with deckles and the means isolating the shaft from the interior of the box comprises operating elements for said deckles.

EDWARD TATUM STREET.

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