JPS5888221A - Bearing structure of flexion adjusting roll - Google Patents

Abstract

PURPOSE:To prevent application of an excessive force onto a bearing by installing a bracket for holding a roller shaft in a bearing box which holds a journal attached to a cell. CONSTITUTION:A journal 32 is bolt-fixed to the edge part of a cylindrical roll cell 31, and said journal 32 is held rotatably in a bearing box 30 through a metal 33 which is inserted along the outer periphery of the journal 32. Each spherical bush 37 is inserted at both edge parts of a roll shaft 36, and installed at the edge part of a bracket 38 bolt-fixed onto the bearing box 30, and thus a roll is held in the bearing box 30 by allowing the holding center of the spherical bush 37 to nearly coincide with the holding center of the bearing box 30.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bearing structure for a deflection adjusting roll.

Generally, roll equipment (such as paper machine presses and calenders) used to manufacture strips has a structure that compensates for roll deflection caused by load and makes the linear pressure between the rolls uniform. It will be done. FIG. 1 is a conventional example of the arrangement of a roll device used in a press, FIG. 2 is a longitudinal sectional view of the same roll, and FIG. 8 is a sectional view taken along line AA in FIG.

In Figure 1, roll (1) has a structure that can compensate for deflection, roll (2) is a roll that cooperates with roll (1), and roll (2) has bearings (3) at both ends.
) and is rotatably fixed by a beam (5) fixed to the top of the stand (4). The roll (1) also has a roll shaft (7) fixed to the arm (6).
It consists of a roll cell (8) rotatably supported on the top, and is rotated by frictional force with the roll (2). The ATM (6) is swingably supported by the stand (4).

In FIGS. 2 and 8, a cylindrical roll cell (8
) is rotatably supported by spherical roller bearings (9) at both left and right ends of the roll shaft (7).

1 Inside the roll cell (8), the roll cell (8)
(7) An annular space 0@ is defined by the inner circumferential surface, the outer circumferential surface of the roll shaft (7), and the bearing (9) (9), and the roll cell ( 8
) A rod-shaped member αυ is shown close to the inner circumferential surface of the cylinder.

On the other hand, inside the roll shaft (7), a hydraulic device a consisting of a plurality of cylinders and a piston paired with the cylinders is arranged in line in the axial direction, and supports a rod-shaped member α1) on the top of the piston. are doing. Further, the roll shaft (7) is provided with a hydraulic passage (13) (13), which supplies oil to the hydraulic device Q4 and to the annular space Ql.

When the roll cell (8) rotates here, the hydraulic device α is activated by the hydraulic pressure to push up the rod-shaped member αυ, and the oil in the annular space α1 flows into the gap between the roll cell (8) and the rod-shaped member αυ. The oil flows along the inner peripheral surface of the roll cell (8) in the direction of arrow B due to centrifugal force and adhesive force, rotates together with the roll cell (8), and connects the top surface of the rod-shaped member aυ with the inner peripheral surface of the roll cell (8). It passes through the wedge-shaped gap formed between the cylinders, generates hydraulic pressure and presses the roll cell (8), applying a uniform linear pressure over the entire width of the working part of the roll cell (8). Occur.

By the way, the paper sheet Q4) is guided in the direction of the arrow X through between the rolls (1) and (2) as shown in FIG. Water is uniformly dehydrated.

Generally, the upper and lower rolls are pressurized before the strip material enters between the rolls, so the roll cell (8) is pushed from the outside by the mating roll, and from the inside of the cell, the cell is pushed up by hydraulic pressure to prevent it from bending. There is no problem, but there is a gap equivalent to the thickness of the plate between the rolls before the strip is inserted between the rolls, such as in a steel rolling mill, and if hydraulic pressure is applied beforehand, that is, the hydraulic pressure is applied in a state where the gap is maintained. When pushing up a cell by applying force, the force pushing down the cell is small, so
Excessive force equivalent to hydraulic pressure acts on the bearings at both the left and right ends.

However, since this bearing must be installed inside the cell, its dimensions are limited, and it is difficult to withstand the excessive force.

The present invention was proposed to eliminate the above-mentioned conventional drawbacks, and includes a bearing box that holds a journal attached to a cell;
By tightening the brackets that hold the roll shaft together, it can be used when applying a deflection adjustment roll to a rolling mill, etc., and the cell can be pushed up with hydraulic pressure before the rolled material enters between the rolls, and it can stand by. Although a large force is applied to the roll cell mounting journal part due to hydraulic pressure, the present invention aims to provide a roll bearing structure in which the outer bearing box receives this force.

Embodiments of the present invention will be explained below with reference to the drawings. FIG. 4 shows an example of the arrangement of a deflection adjusting roll having a bearing structure according to an embodiment of the present invention when used in a rolling mill, and FIG. 6 is a cross-sectional view of the deflection adjusting roll, and FIG. 7 shows an example in which a highly rigid beam is provided below the roll.

Now, in FIG. 4, the upper roll (21) is positioned by the lowering device (E) via the upper backup roll 04 provided in contact with the upper roll (21). Also, lower roll Q2
is supported from below via a lower backup roll (c) provided in contact with it.

The frame (c) is attached to these rolls and the rolling device (a)
is held.

The material to be rolled is rolled on the roller table (5), passed between the upper roll I2υ and the lower roll Q2, and is rolled.
It is guided in the direction of arrow C. The deflection adjustment roll is the upper backup roll c! 4) and lower backup roll (
(c) is applied, and the object to be rolled (c) is rolled uniformly over its entire width.

In Figures 5 and 6, the left side is the bearing part on the operating side X;
The right side shows the bearing part on the driving side Y, and the center part shows the roll cell part. Since the bearing part on the driving side Y is structurally almost the same as the bearing part on the operating side X, only the structure of the bearing part on the operating side X will be explained.

In the figure, a journal 0 is bolted to the end of the cylindrical roll cell 0υ, and the journal G can be rotated to the bearing box (to) via a metal inserted on the outer periphery (c). is maintained.

In addition, a pair of spherical bushings G7 are provided at the end of the roll shaft (to).
) is inserted and attached to the end of the bracket (to) which is bolted to the bearing box (to), and the spherical bushing 0'? ) is held in the bearing box 00 so that its holding center almost overlaps with the holding center of the bearing box (to). The outer bushing of this spherical bushing 0η is fixed to the racket (to) lζ by the presser foot 01, and the inner bushing is fixed to the roll shaft (g) by the presser foot (4@) and (4υ).

An annular space (48) is formed inside the roll cell Gυ, which is defined by the inner peripheral surface of the cell and the outer peripheral surface between the roll axis, the journal (321), and the bracket.

At the top of this annular space decoy, a rod-shaped member (4 rods) is arranged close to the circumferential surface of the roll cell C31).

On the other hand, an oil well (43) connected to an external oil pump (not shown) is provided between the roll shafts, and a plurality of oil wells (44) are connected to the oil well (43). Rod-shaped member (
A plurality of small holes (45) are provided in the four holes, and an oil filler (44) is provided in the four holes.
).

Next, the operation will be explained. When the roll cell C31) rotates, oil is supplied from the pressure oil pump to the roll shaft (G). This oil passes through the oil container (43), enters the lower part of the rod-shaped member (4) from the oil container (44), and pushes up and holds the rod-shaped member (4';!J). Some are small holes (4
The inner peripheral surface of the roll cell 6υ and the rod-shaped member (4'!
It enters the space between the upper part of J and the roll cell Gυ and the rod-shaped member (
Lubricate the contact surfaces with 4.

In addition, the rolled product (c) is the upper roll Q1) and the lower roll (
The roll cell C31) of the upper backup roll 24) and the lower backup roll (c) is pushed up and on standby by the hydraulic pressure before entering between the end of the roll cell Gυ. A large force is applied to the bearing box (
The uke stops at (g).

Also, the reaction force applied to the roll axis (toward) is the spherical bushing 07)
is attached to the end of the bracket (offset from the center of the bracket), and the holding center of the spherical bushing C37) is located at the holding center of the bearing box (to), so No moment is applied.

FIG. 7 shows another embodiment, in which a highly rigid beam (4!ll) is provided below the roll C31), and the roll shaft (T) is held by this beam (49).

When a workpiece to be rolled is placed between upper and lower rolls and pressurized, conventionally it was not possible to apply hydraulic pressure before applying pressure, but since the present invention has the above-mentioned bearing structure, it is possible to apply hydraulic pressure before applying pressure. is possible.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of a roll device used in a conventional press, Fig. 2 is a front sectional view of a roll in the same device, Fig. 8 is a sectional view taken along line A-A in Fig. The drawings are a side view of a case where the bearing structure of the deflection adjusting roll according to an embodiment of the present invention is used in a rolling mill, FIG. 5 is a front cross-sectional view of the deflection adjusting roll, FIG. 6 is a side cross-sectional view, and FIG. The figure is a front sectional view of a deflection adjusting roll showing another embodiment. Description of main parts of the figure 80...Bearing box 81...Roll cell 82...Journal 88...Metal 86...Roll shaft
88...Bracket Atsushi 1 Figure 5

Claims (1)

[Claims] In a roll in which the deflection of the cell can be adjusted by applying hydraulic pressure inside the roll cell, the bearing box that holds the journal attached to the cell and the bracket that holds the roll shaft are mutually tightened. The bearing structure of the deflection adjustment roll.