US1805671A - Gearless suction roll - Google Patents

Description

y 1931'. w. H. MILLSPAUGH 1,805,671

GEARLESS SUCTION ROLL Filed March 17, 1928 2 Sheets-Sheet 1 y 1931- I w. H. MILLSPAUGH 71 GEARLESS SUCTION ROLL Filed March 17, 1928 2 Sheets-Sheet 2 INVENTOR.

% dWM z BY /'4.4 M M ATTORNEYS.

t r n. srAUen, or snmiosxr, onro, assrenon no i macnrmx COMPANY, or smnsxv, onro enanrnss so'orron' norm Application filed March 17, 1928. Serial 1W0. 282,4?!

The present invention relates to paper making machinery and more particularly to a. suction roll gearless drive or means for driving or revolving the perforate shell of the roll by other than gears. 1

It has been common practice in recent years to drive the shell by direct intermeshing gears, one gear being rigidly fixed to the shell at or near one end, in any suitable or well known manner. Necessarily, this increased the over-all diameter by the difference between the exterior diameters of the shell and are to avoid this and other recognized difiiculties met with in the gear driven roll.

In order to more clearly disclose the construction, operation, and use of the invention, reference should be had to the accompanying drawings forming part of the present application. Throughout the several figures of the drawingslikeleference characters designatethe same parts in the several vlews. 1

In the drawings:

Fig. 1 is a central vertical longitudinal cross section through one preferred, form of the invention.

Fig. 2' is a cross section on line 2-2 of Fig.

1 looking in the direction of the arrows.

Fig. 3 is a left hand end view of Fig. 1, with the driveomitted, and 1 Fig; 4 is a top plan view.

The type of gear driven suction roll in general use throughout the paper making industry, both in this country and abroad is pretty well disclosed in the re-issue patent of Mills paugh 13,100, dated April 12, 1910.

For friction reduction or easier driving,

roller bearing mounting of the shell as in re-issue Millspaugh Patent 16,501 dated December 7, 1926, is used. For details as to mounting of the suction box within the shell and the antifriction roller support, reference is made to said patents. The same is true as to the construction and arrangement of the suction box or chamber and its disposition within the shell, in generals Referring to the drawings in detail, 1 indicates the perforate shell or roll through which the suction operates oris effective on -"the pulp, in the process of paper making.

Within this shell is supported the suction box 2 of usual and well known construction. Its longitudinal edges adjacent the inner face of the shell are provided with the usual well known'p'acking strips, all as clearly shown in re-issue Patent 13,100.

The ends of said box are slidably mounted in heads 3 having U-shaped openings 3} therein. in which said ends are positioned. The side walls of said box at said ends are provided with vertical grooves (not shown) which receive the walls of said heads defining the sides of said openings to provide for this slidable mounting. On the walls forming the bottom end of each ofsaid' openings is disposed an annular plate or washer 4: to act as a spring seat for each coil suction box supporting spring 5. A stud or pin 6 at each end of the suction box extends through and centers each spring so that it will be kept in proper position. As will be readily understood, these springs unless counteracted would force the suction box into tight frictional engagement with the inner wall of the shell. To avoid this, set screws 3 are provided'in thesame way as in said re-issue patent.

Tn the gear driven construction in general use, the blocks or heads for supporting the ends of the suction box are both carried by frames, brackets or other supports, entirely exterior to the shell. In the gearless drive of this invention that isnot possible at the drive end of the shell, as'will he evident. Tt is possible only at the opposite orfree end, the front, as it is coonly referred to.

a stationary bracket fixed to the machine frame.

At the opposite or drive end on the other hand, the head has formed about itsoute'r periphery a suitable inner bearing race 7, between which and a similar outer bearing race 8 carried by an annular radially offset t wall of a ring shaped plate or collar secured to the outer face ofthe shell near that end is disposed a set of rollers or other suitable antifriction bearings 9. At this end the head or block is free and unconnected and rides freely on these hearings. Thus, while the suction box end at the drive end is free, at the opposite end it is securely and rigidly held against any movement relatively to the shell, except the slight adjustment provided by the set screws. For supporting this end of the shell a suitable frame 11, preferably of U- shaped construction is provided. Within this frame is mounted a similarly shaped cradle 12 in which are journaled the antifrictionally mounted shell supporting rolls 13. A suitable steel bearing band is shrunk onto the shell to take thewear incident to travel on said rolls 13. The cradle, it will be seen, is constructed and mounted to have substantially universal movement, to a limited extent. For this purpose it is slightly spaced, laterally, from the adjacent side walls of the enclosedframe, as also at the bottom, except at three pointsthe ends and center. At the center, the cradle is horizon tally swiveled in the bottom of the frame by add to a pin 13 extending from the cradle and freely rotatable in a corresponding bore or perforation 13 in the base 14* of the U- shaped frame.

The suction is taken in the usual way, but from the front end of the roll and need not be described here as it forms no part of the present invention.

At the drive end, a disc or circular head 14: is provided as the driving connection. This disk is provided with a peripheral-flange 15 which is securely fixed to the shell in any suitable and well in the large diameter rolls, in order to reduce the over-all diameter as much as possibllle,1 ithe flange is connected on the inside of the s e the record of the case by the further illustration covering this point. From the center of the disk extends the indrive shaft 16 which may be driven direct from a motor or any usual driving machinery (not shown). Obviously, it may also be driven indirectly through suitable connections. At a point near the disk or driving head the shaft 16 is journaled in suitable antifriction bearings 17 m the standard 18. Or, at this end, also, the

I shell may be mounted as at the opposite end, a

known way. Preferably It has not been thought advisable td Babbitt bearing being substituted for the antifriction bearing of the drive shaft, and clutch connection made direct with the head. The member or element which immediately connects the shell to the drive shaft has been for the flange. Of course, any other number of arms may be similarly provided. The disk construction described is a strong, efficient. compact and economical form and may be more readily .and quickly made. In some cases, especially with smaller diameter rolls,

it may be preferable to have a detachable instead of a fixed connection. This may be done in many ways, as by pins or studs on the shell, cooperating with key-hole, bayonet, or other locking slots in the flange or in the arm ends; or, inside, the flange or arm ends may be simply bolt-and-nut connected.

It is theintention, of course, to include in this application and to cover by the appended claims both the fixed and detachable connections. A ready and accessible deckle adjustment for this construction is provided at the front end of the machine and made as compact as practicable to adapt it to the least possible space. Said adjustment comprises two separate and independent shafts 20 and 21 threaded at their free ends into deckle blocks. or heads 20 longitudinally slidable between the side walls of the suction box and the bottom wall thereof and adjacent shell surface, and in simultaneous contact with all four surfaces, all as clearlyshown in Fig. 1. The shaft 20 is tubular and exteriorly screw threaded through the deckle head nearest the suction end of the box and isjournaled in the suction box supporting head 3 at that end. Shaft 21, on the other hand, which preferably, is solid, extends through and is journaled in the shaft 20. It isthreaded into the deckle head lying nearer the opposite end of the shell. Both shafts are provided with hand wheels, cranks, or any other suitable opcrating means 22. They are oppositely threaded to cause the blocks to travel inwardly. from opposite sides toward the center.

Thismakes a simple, efiicient, and compact construction whereby either deckle may be adjusted to any extent desired without in any degree aflecting the other, while at the same time occupying the space required for the single adjusting means for one deckle head onl I fie will be clear on reference to Fig. 1 that there are only three sets of bearings all together, and that all three sets are very easily and quickly accessible at any and all times. In case of damage with resulting need of repair and replacement this is very immaking the repairs,

' the heavy loss in the operationand producsimple, efficient, of-least, possible over-all diwear. To accomplish .65 shell, a stationary head tion of the machine during the time it is idle for repairs.

The construction thus provided is compact,

ameter, and has the minimum number of. operating parts.

It has been found in practice, under actual working conditions, that considerably more waste water reaches the interior of the shell than will readily flow out through the perforations of the lower side during the op,-'

eration, unassisted. This excess runs out either end over the edge and into the bearings or other working parts. It carries with it grit and fibre which cause excessive wear on these parts. If the flow is checked so that this out-flow is prevented, the slight head afforded by the accumulation will force all of it through the perforations, thereby completely avoiding such otherwise excessive this result an annular dam is provided in each end in the form of a ring or band 19 of sufficient thickness or height, radially, to provide an ample wall ordam to check the longitudinal flow of any water within the shell, until it passes through the perforations in the lower part of the shell. In'practice, of course, a suitable clutch of any unusual and well known type-and construction may be interposed at some point between the power unit and the driven roll. Clutches in similar positions being well understood, it is not necess ry to enter into detailed illustration or description of the same various parts of the invention within the scope of the appended claims, without in any sense departing from the field of the invention, and it is meant to include all such within this application wherein only a single preferred form has been disclosed by way of practical illustration only. What I claim is:

1. In combination with a suction roll shell, means-adapted to create within said shell a predetermined hydraulic head.

2. In combination with a suction roll shell, a radially extending circumferential band }adapted to create a predetermined hydraulic ea r 3., In combination with a suction roll shell means within said shell adjacent each end thereof and adapted to create within-said shell a hydraulic head.

4, In combination with a suction roll shell,

as well asthe saving of "a suction box in said shell supported beyond the end of said shell, a second head in the other end of said shell forming a journal for said latter end, a suction box in said shell supported in said heads, and rigid'means securedto the latter end of said shell for rotating said shell about said second end.

6. A suction roll comprising a perforated shell, a stationary head'for one end of said shell situated and supported beyond said end, a second stationary head for the other end of said shell positioned in said end, roller bearings between said latter head and end, said heads having aligned openings therein, a suction box in said shell with its ends movably mounted in said openings, and rigid means secured to the latter endof said shell bearings between said head and enlargement, a second stationary head supported beyond the other end of said shell, said heads having aligned openings therein, shell with its ends mounted insaid openings so as to be vertically movable therein, supporting said suction box in said openings, and rigid means secured to said enlarged shell end for rotating said shell about said first fieag as a journal and relative to said second 8. A driving and supporting mechanism for a suction roll having a perforate shell comprising a pair of spaced bearing rolls beneath one end of said shell, a wear-resisting bandon said shell contacting said roll, an enlarged extension forming a continuation of the opposite end of said shell, 2. head in said extension forming a journal for said end, a drive shaft, bearin s supporting sai shaft, and a disc rigid w1th said shaft and enlarged-extension whereby said shaft rotate'ssaid shell on said bearing rolls and about said head.

9. A device as in claim 8 wherein antifric'tion bearing means-are provided between said head and end extension.

In testimony whereof I aflix my signature.

. WILLIAM H. MILLSPAUGH.

located and fixedly resilient means for radially extending circumferential bands adjacent the respective ends and adapted to create a hydraulic head. i 5. A suction roll comprising a perforated for one endof said

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