US2431856A

US2431856A - Combined roller and spool mounting for paper machines

Info

Publication number: US2431856A
Application number: US571168A
Authority: US
Inventors: John A Ziegler
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-01-03
Filing date: 1945-01-03
Publication date: 1947-12-02
Anticipated expiration: 1964-12-02

Description

Dec. 2, 1947. J, ZIEGLER 2,431,856

COMBINED ROLLER AND SPOOL MOUNTING FOR PAPER MACHINES Filed Jan. '3, 1945 2 Sheets-Sheet 1 ,INVENTOR. JOHN A ZIEGLER ATTORNEYS Dec. 2, 1947. J. A. ZIEGLER 2,431,856

COMBINED ROLLER AND SPOOL MOUNTING FOR PAPER MACHINES Filed Jar 1. s, 1945 2 Sheets-Sheet 2 INVENTOR. JOHN A ZIEGLER BY M w:

ATTORNEYS Patented Dec. 2, 1947 UNITED STATES PATENT OFFICE COMBTNED RQLLEB AND SPOOL MOUNTING -FOR PAPER MACHINES .lohnA. Ziegler, Camas, Wash.

Application January 3, 1945, Serial No. 571,168

4 Claims. (Cl. 30820) come this tendency and keep the felt properly positioned, it is common practice to employ special felt guide rolls. These "guide rolls as a rule are mounted on shafts which have the position of one end fixed and the other end movably mounted so that the guide roll can be moved out of perpendicularity with the direction of travel of the felt. As is well known, the tendency of the traveling felt is to follow a path perpendicular to the axis of rotation of any roll or roller over which the felt is passing. Consequently, a slight change in position of one end of the shaft of a felt guide roll will cause the felt to creep towards whatever end would bring the line of travel more nearly perpendicular to the guide roll axis.

Various means for causing an automatic change of position of one end of the guide roll shaft or axis are at present being used. As part of such means a, control spool is often located adjacent one end of a fixed 'roler and connected to the support for the movable end of the guide roll. Certain difficulties are presented with such control means and the principal obiect of this invention is to overcome these difficulties and provide an improved control means end mounting for the same. In the accompanying drawings:

Fig. l is a fragmentary isometric perspective of a part of a paper-making machine, showing one of the felt guide rolls and my improved control means connected therewith;

Fig. 2 is an axial section through the main part of such control means, this section corresponding to line 2-2 of Fig. 1; and

Fig. 3 is a section taken transversely through the control snool on the plane indicated by the line 33 of Fig. 2. i

In Fig. l the belt-like carrier or endless felt on which the paper mat is carried is shown at H]. The felt passes over the guide roll I l and the fiit ed roller l2 located a short distance from the guide roll H. The guide roll'shaft I3 is pivotally journaled at one end in a suitable stationary bearing l4. At the o posite end the shaft I3 is jourhaled in a bearing [5 carried on the bottom (if a,

2 pivotally supported arm IS. The arm I6 is pivotal-ly suspended from a machine frame member 41 located above the corresponding end of the guide roll.

A spring [8, having one end attached to the bottom of the bearing l5 and the other end connected to any suitable member, such as the member I S-mounted on the machine frame, is so arranged as to pull the arm l6 and bearing l5 towards the left, as viewed in Fig. 1, and thus move the axis of the guide roll II out of perpendicularity with the line of travel of the felt H1. The direction of travel of the felt ID is indicated by the arrow X in Fig. 1.

The axis of the felt-supporting roller I2 is fixed, the shaft of this roller being supported in

suitable bearing blocks

20 and 2|, secured to opposite sides of the machine frame.

A-spool 22 is rotatably mounted at one end of the roller l2 and this spool is rotatable independ- 'ent of the roller l2. A leather strap 23 is carried on the-spool 22, one end of the strap being att'achedit'othe spool andthe other end of the strap being attached to a rope or small cable M, which in turn is connected to the movable bearing it of the guide r'oll shaft I3. The strap 23 extends counter-clockwise around the spool 22 and thus in the opposite direction from the clockwise direction in which the roller I2 is rotated by the passage of the felt I'll ever the roller l2.

The surface of the spool 22 may be either truly cylindrical or slightly tapered in the form of a cone frustrum, as shown in Fig. 2. I consider the latter shape preferable. The smaller diameter end of the spool, which .is approximately of the same diameter as the roller 12. is p aced adjacent the roller end and the larger diameter end of the spool is at the ou side. The strap 23 preferably extends a slight distance over the roller 12 and its inner edge in such case is beveled on the underside. as shown at 24 (Fig. 2). to provide a slight clearance between the underside of the stra and the surface of the roller [2. and thus prevent undue wear on the inner edge of the strap and also to enable the fe t to slide on to the strap without hesitanc or difficu tv. wheneverthe felt starts to move too far towards the spool end of roller U2. The result of such movement of the felt on to the strap will'be described later.

' The mounting for the spool 22 and for the ro ler shaft at that end of the roller I2, is the most important feature of my invention. The roller shaft 25 has an intermediate reduced diameter section 2i; and a further reduced diameter outer section {2-1, with a resulting annular shoulder where one .preventing the felt from creeping section joins another. A small groove 28 extends around section 25, as shown in Fig. 2, the purpose of which will be explained later. The roller shaft is supported in suitable bearings, such as the ball bearings 29 mounted in the inner and outer races 30 and 3i. The inner race 35 is held in place by the spacer ring 32 and by the disk 33, which is secured on the end of the roller shaft by the nut I 34. The outer race 3| is securely mounted in the bearing block 2| and held in place between a tubular housing 35 on the inside and the end sealing cap 36 on the outside. The cap 36 and the tubular housing 35 are secured to the bearing block 2! by means of bolts 31. A bronze bushing 38 is attached to the inside surface of the tubular housing 35. The outside surface of the tubular housing 35 has a reduced diameter portion 39 on which the spool 22 is supported.

A plurality of holes or channels 40 extend radially through the bushing 38 and tubular housing 35 in registration with the annular groove 28 and the channels 40 preferably terminate approximately at the center of the bearing surface for the spool on the housing 35.

Lubricant supplied to the space inside the outer end cap 36 will not only keep the bearings 29 lubricated but considerable portion of such lubricant will also be delivered through the passageway 4| and thence pass between the bushing 38 and the shaft section 26. Furthermore, some of this lubricant collecting in the shallow groove 28 will be caused by the centrifugal force generated by the roller shaft to pass through the channels 40 and from thence between the bearing surfaces of the spool and the reduced diameter portion 39, which serves as the bearing surface for the spool on the housing 35.

During the travel of the felt l carrying the paper web or mat in the paper making machine, let it be assumed that the spring l8 has pulled the bearing l5 of the guide roll H slightly to the left, as viewed in Fig. 1, and thus moved the axis of the guide roll slightly out of perpendicularity with the line of travel of the felt. Since the tendencyof the felt is to follow a path which is perpendicular to the axis of rotation of a roller with Which it is in frictional contact, the felt It] will gradually creep towards the movable end of the guide roll I l and thus will gradually creep towards the spool adjoining the end of the roller l2. However, when the edge of the felt starts to move over the strap 23 the frictional engagement of the felt with the strap will cause the strap and spool 22 to be given a slight clockwise rotation, as viewed in Fig. 1, which will cause a pull to be exerted on the movable bearing l5 against the force of the spring l8. This wi l cause the end of guide roll I l to be moved slightly to the right. When this change in the position of the axis of the guide roll occurs the tendency of the felt will than be to creep towards the opposite end of the guide roll and thus to move away from contact with the strap 23. But when the felt no longer engages the strap 23 the pull to the right on the movable hearing I 5 is released and the spring l8 then again functions to move the bearing I5 slightly to the left, thus preventing the felt from creeping too far towards the opposite end of the guide roll. This method of too far to one end or to the other of the guide roll is well known.

Thus, the spool 22 will remain stationary on the tubular housing 35 most of the time while the roller [2 is rotating rapidly, but the spool 22 will occasionally be required to rotate a. few degrees clockwise and then counter-clockwise on the stationary housing.

Since considerable water drips from the paper mat as it is carried on the felt over the various rollers in the paper-making machine, I have found, with previous mountings for similar control spools, that some of this water dripping down over the ends of the rollers will get in between the bearing surface of the spool and the supporting bearing surface of the housing on which the spool is mounted, with the result that rust will gradually set in and often also added corrosion caused by chemicals in solution in the water. The fact that the spool rotates so seldom and then only rotates slightly on each occasion, makes it difficult to keep the bearing surfaces between spool and stationary housing completely lubricated, and makes it difficult particularly to prevent water from entering between these bearing surfaces. However, with the special mounting which I have developed I have been able to overcome this difliculty and the lubricant delivered to the bearings 29 will not only pass between the bushin 38 and the shaft section 26 during the rotation of the roller shaft, but some of this lubricant will be delivered to the space between the bearing surface of the spool 22 and the surface f the reduced diameter portion 39 of the housing 35. I have found, in fact, that the rotation of the roller shaft will cause sufiicient lubricant under ordinary circumstances to be delivered to this space to keep the same so completely filled with lubricant that all water is prevented from entering into this space regardless of whether the spool rotates or not. Thus, danger of any rust or corrosion developing on the bearing surfaces of the spool or housing is entirely eliminated and the spool is kept properly lubricated at all times to enable it to rotate on the housing whenever this should be required in the operation of the felt guide means.

I claim:

1. A combined roller and spool mounting for paper machines, comprising a bearing support, bearings for one end of the roller shaft mounted within said support, a stationary housing associated with said bearing support, a felt guide control spool rotatably mounted on said housing, a plurality of holes extending through said housing and terminating at the bearing surface for said spool on said housing, means for delivering lubricant about said shaft in said housing, whereby part of said lubricant about said shaft in said housing will be caused by the rotation of said shaft to pass through said holes and be forced between the bearing surfaces of said spool and housing, thereby keeping said spool lubricated and preventing water or other undesirable substances from entering between the bearing surfaces of said spool and housing.

2. A combined roller and spool mounting for paper machines, including a bearing block, bearings for one end of the roller shaft mounted within said block, a stationary tubular housing attached to said bearing block, a felt guide control spool rotatably mounted on said housing, a plurality of channels extending radially through said housing and terminating at the bearing surface for said spool on said housing, a lubricant passageway leading inwardly from said bearings into said tubular housing, whereby lubricant from said bearings will spread over the roller shaft within said housing and part of such lubricant will be caused by the rotation of said shaft to pass through said radial channels and be forced between the bearing surfaces of said spool and housing, thereby keeping said spool lubricated and preventing water or other undesirable substances from entering between the bearing surfaces of said spool and housing.

3. In a paper making machine having a felt supporting roller, a bearing support, bearings for one end of the roller shaft mounted within said support, a stationary housing associated with said bearing support, a felt guide control spool rotatably mounted on said housing, a plurality of channels extending through said housing and terminating at the bearing surface for said spool on said housing, an annular groove extending around the roller shaft within said housing, said channels registering with said groove, means for delivering lubricant about said shaft in said housing, whereby part of said lubricant about said shaft in said housing will fill said groove and will be caused by the rotation of said shaft to pass through said channels and be forced between the bearing surfaces of said spool and housing, thereby keeping said spool lubricated and preventing water or other undesirable substances from entering between the bearing surfaces of said spool and housing.

4. In a paper making machine having a felt supporting roller, a bearing support, bearings for one end of the roller shaft mounted within said support, a stationary tubular housing attached to said bearing support, a felt guide control spool rotatably mounted on said housing, a tubular bushing within said stationary housing, a plurality of holes extending radially through said housing and bushing and terminating at the bearing surface for said spool on said housing, an annular groove extending around the roller shaft within said bushing and housing, said holes registering with said groove, a lubricant passageway leading inwardly from said bearings into said tubular housing, whereby lubricant from said bearings will spread over the roller shaft within said bushing and housing and will fill said groove and will be caused by the rotation of said shaft to pass through said radial holes and be forced between the bearing surfaces of said spool and housing, thereby keeping said spool lubricated and preventing water or other undesirable substances from entering between the bearing surfaces of said spool and housing,

JOHN A. ZLEGLER.

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

UNITED STATES PATENTS Number Name Date 893,690 Wood July 21, 1908 2,008,318 Ziegler July 16, 1935 FOREIGN PATENTS Number Country Date 1,645 Austria Mar. 15, 1900 225,734 Great Britain Dec. 11, 1924