JP3121284B2 - Linear pressure distribution adjusting roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear pressure distribution adjusting roll having a roll shell rotatably disposed around a fixed beam and a support element which is urged by a pressure medium and abuts on the roll shell. The present invention relates to a linear pressure distribution adjusting roll including a plurality of supply pipes for supplying a pressure medium having different pressures to a support element and disposed in a central hole of a fixed beam and a partition inserted therethrough.

[0002]

2. Description of the Related Art When a wide sheet-like member is supplied to a pressurizing device for the purpose of dewatering squeezing, polishing, or adjusting the thickness, it is necessary to apply a uniform pressing force in the width direction of the sheet-like member. This is necessary, and when the work is performed continuously, a roll-shaped pressing device is usually used. When pressure is applied by two or more pressing rolls, the pressing force causes deflection of the roll. With a simple solid roll or tube roll, the pressing force is increased by a uniform pressing force (linear pressure) in the width direction as the pressing force increases. It becomes difficult. In order to solve this, various methods have been proposed as known techniques, among which is a linear pressure distribution adjusting roll.

This linear pressure distribution adjusting roll comprises a rotating roll shell and a fixed beam in which a static pressure bearing type pressurizing piston as a supporting element is arranged over the length of the pressurizing surface, and the roll shell follows the stroke of the pressurizing piston. The nip can be moved in one direction, and the nip can be pressurized and released without moving the fixed beam.

In order to adjust the distribution of the pressing force applied to each piston in the width direction and to deflect the roll shell in accordance with the deflection of the mating roll to keep the linear pressure distribution constant, a conventional linear pressure distribution adjusting roll is used. A pressure piston arranged in the pressure direction is divided into a plurality of zones, and the pressure in each zone is independently controlled so as to create a substantially constant linear pressure distribution in the width direction.

The self-pressing type linear pressure distribution adjusting roll for performing the zone control has a structure having a plurality of supply pipes in a central hole of a fixed beam and a partition wall inserted therethrough. This structure solves the drawbacks of the conventional linear pressure distribution adjusting roll in which the supply conduits are formed and each conduit is assigned to an individual hydraulic support element. That is, by adopting the above configuration, the flow path of the pressure medium can be manufactured at low cost while maintaining the intensity of the beam, and the group of the pressing force can be replaced.

In a conventional linear pressure distribution adjusting roll, a plurality of removable partition walls are arranged in a central hole of a fixed beam to form a plurality of central hole sections, and one of supply pipes is connected to the partition wall. Other supply pipes were arranged to extend side by side, forming a plurality of pressure zones corresponding to each central hole section.

[0007]

However, in the conventional zone control type linear pressure distribution adjusting roll, when a plurality of pistons are arranged in one zone, particularly a large number of pistons, the linear pressure is precisely adjusted over a wide linear pressure range. It was difficult to make the distribution uniform. However, in the paper manufacturing industry, etc., finer linear pressure is applied to finely adjust the gloss and thickness unevenness of the sheet in the width direction due to unevenness of the product in the width direction generated in the sheet forming process due to various factors in the process. Distribution adjustment and fine adjustment of the linear pressure distribution in a narrow width are required.

In order to perform more precise zone control, a system may be used in which each pressurizing piston is independently pressurized. However, a configuration in which a number of pressurizing supply pipes are provided in a limited space, A configuration for effectively supplying the pressure medium to the piston has not been developed yet.

Further, in the conventional linear pressure distribution adjusting roll, since the width of the pressure region is large and the load acts on the beam over the entire region, there is a problem that stress is generated in the partition wall positioning member due to a differential pressure between adjacent zones. Was.

By the way, the supporting elements are arranged in a row on the mating roll side. However, in order to reduce the pressing force at both ends of the roll shell or to compensate for the inherent weight of the roll shell, the supporting elements are arranged in the direction opposite to the direction of the pressing force. A working supporting element may be provided separately. This support element is used in the direction away from the opponent roll, that is, as a pull-off element, but if there is such a support element that acts in a different direction, in the conventional zone control method, all the elements arranged in the same zone are Precise adjustment of the linear pressure distribution was not possible because the same pressure was applied in all directions.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and can efficiently supply a plurality of supply pipes and supply a pressure medium to each support element individually even with a simple structure. An object of the present invention is to provide a linear pressure distribution adjusting roll that does not generate stress, and enables more precise linear pressure distribution adjustment and fine adjustment of a linear pressure distribution in a narrow width. It is another object of the present invention to provide a linear pressure distribution adjusting roll capable of controlling a pressing force to be different even when there is a supporting element acting in a different direction which becomes the same zone in the conventional zone control system.

According to a second aspect of the present invention, there is provided a linear pressure distribution adjusting roll capable of easily assembling and securing accuracy while protecting a large number of supply pipes, and having a compact discharge means for a used pressure medium. It is intended to provide.

Further, according to the third aspect of the present invention, even when the pressure medium is individually supplied to each support element by the distribution disk, the linear pressure distribution can be adjusted so that the adjacent pressure disks can supply the same pressure medium. Intended to provide roles

[0014]

In order to solve the above problems, a linear pressure distribution adjusting roll according to the present invention comprises a fixed beam,
A roll shell rotatably arranged around the fixed beam, a plurality of support elements urged by a pressure medium flowing through a connection hole formed in the fixed beam and abutting on the roll shell; A plurality of supply pipes connected to a supply pipe at the end of the fixed beam and provided in a central hole for supplying a pressure medium having a pressure, and a partition wall attached to the central hole and through which the supply pipe is inserted. A positioning member for installing the partition wall at a predetermined position in the center hole, and a space between the supply pipe and the center hole through a side hole for drilling the used pressure medium flowing through the space between the fixed beam and the roll shell in the fixed beam. in linear pressure distribution adjustment roll with a drainage means of pouring to a discharge flow line through the partition wall, subjected to the connecting hole from any location periphery of pressure medium fed from the feed pipe
When circumferentially throughout the outer periphery a groove for allowing the sheet
The packing medium provided on both sides of the groove
It is characterized by having a distribution disk enclosed in the groove .

Further, the partition has an isolating disk between the lateral hole and the distribution disk adjacent thereto, and the positioning member is a protective tube which has a bundle of supply pipes internally and is fixed between the partitions. An end protection tube between the isolation disk and the roll end disk, and the drainage means has a space formed between an outer surface of the end protection tube and the central hole for passing used pressure medium. It is desirable. Further, the distribution disk may have a communication hole for supplying the pressure medium sent from the supply pipe to the groove to another adjacent distribution disk, and a connecting thin tube connected to the communication hole.

Here, the distribution disk is a disk sized to be movable along the central hole, and a hole is formed in the center to supply a tension rod and a supply pipe group connected to another distribution disk. Insert. These may be entirely inserted into one common hole or may be individually inserted into a plurality of holes. A connection portion of a supply pipe for supplying a pressure medium to the disk is provided on the front surface of the distribution disk, and a groove for supplying the pressure medium to the connection hole is provided on the outer periphery, and the groove and the connection portion are formed by a passage hole. linked. The supply pipe is attached and detached at the connection part.

The groove is provided over the entire outer periphery of the disk.
The number may be plural. The supply pipes leading to these different grooves may be common or separate. A narrow groove for accommodating the packing ring is provided on the side of each groove. This packing ring is composed of an O-ring and a return seal pressed against the wall surface of the central hole by its elastic force to enable the disk to enter and exit and to seal the pressure medium in the groove.

Since the pressure medium can be supplied to the connection hole from any position on the outer periphery of the disk, there is no need to position the disk in the circumferential direction. When a plurality of grooves are supplied with a pressure medium having different pressures, the supporting element corresponding to each groove can control the pressure applied to the roll shell to be different. As described above, since the pressure medium acting on the fixed beam is limited to the groove portion of the distribution disk, no stress is generated due to the differential pressure.

The grooves must be fixed at the corresponding positions of the connection holes. For this purpose, a distance pipe is provided as a member for positioning each disk. When the disks are pulled toward each other by the tension rod fixed to the shielding cover provided at the end of the fixed roll, the distance pipe accurately maintains the distance between the adjacent disks and achieves positioning.

When this distance pipe is a protective pipe in which a bundle of supply pipes is provided, handling and assembling dimensional accuracy during assembling can be ensured even when a small and weak supply pipe group is taken in and out for maintenance and inspection. It becomes easier.
Further, when the used pressure medium is passed through a space formed between the outer surface of the end protection tube and the center hole, the discharge resistance is reduced and the pressure medium staying in the roll can be reduced. It should be noted that providing the discharge pipe on the supply pipe side makes the whole apparatus compact.

If adjacent distribution disks can be made of a pressure medium of the same pressure, they can also be connected by connecting thin tubes. At this time, the communication hole is connected to the passage hole, and the connecting capillary is connected to the supply pipe connection portion of another disk.

[0022]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is an axial sectional view of a linear pressure distribution adjusting roll, FIG. 2 is an enlarged sectional view of a center portion of a fixed beam taken along a line II-II in FIG. 1, and FIG. 3 is an enlarged sectional view taken along a line III-III in FIG. It is sectional drawing. The linear pressure distribution adjusting roll 1 has a roll shell 3 rotatably disposed around a fixed beam 2. The roll shell 3 is supported at both ends by roller bearings 4. The roll shell 3 can be moved with respect to the fixed beam 2 by a structure capable of lift operation so that the center of rotation can be displaced within a certain range in the direction of the pressing surface. Installed.

At both ends of the roll shell 3, blocking disks 6 provided with packings 5 are attached, and both ends of the fixed beam 2 are supported by side wall members 7 of the apparatus. The support portion is supported by a spherical bearing 8 so that it can bend when the fixed beam 2 receives a load, but is held by a detent 9 so that the beam does not rotate.

On one side of the fixed beam 2, cylindrical cylinders 10 are arranged in a row, in which a piston-like hydrostatic support element 11 is guided in a liquid-tight manner and can slide. It has become. The support element 11 is provided with a bearing pocket 11a communicating with the pressure chamber 12 of the cylinder 10 and a throttle hole 11b.

The support element 11 abuts against the inner wall 3a of the roll shell 3 by the pressure medium acting in the cylinder 10,
Thereby, the roll shell 3 is supported on the fixed beam 2. The cylinder 10 communicates with the central hole 14 of the fixed beam 2 via a connection hole 13.

The distribution disk 1 installed in the central hole 14
5, a groove 15a for supplying the pressure medium sent from the supply pipe 16 to the connection hole 13 is provided on the outer periphery. The pressure medium has a pressure which is controlled to give the required pressing force to the support element 11. Due to the rotation of the roll shell 3, a hydrostatic lubrication layer is formed between the support running surface of the support element 11 and the inner surface of the shell, and the liquid flowing out of the support element 11 is transported between the shell and the beam. Some void 17
Leaked to In this way, the roll shell 3 is pressed against the counter roll 18 by the support element 11.

The supply pipes 16 are connected in the shielding cover 20 to the same number of supply pipes 19 for supplying the medium measured by an external pressure measuring device (not shown) so as to have different pressures. It extends to the disk 15.

The shielding cover 20 has a collecting pipe plate 21 for connecting the bundle of the supply pipes 16 and a mating collecting pipe sheet 22 for connecting the supply pipe line 19. A joint positioning member 23 such as a pin or a tenon is provided on the opposing surface so that only the combination of. This ensures ease of connection and accuracy. Although the center of each of these two tube sheets is set on the axis of the fixed beam 2, it may be located at a right angle or at a certain angle from the axis.

The distribution disk 15 is a disk sized to be movable along the center hole 14, and has a hole 15b formed in the center so that the tension rod 24 and the other distribution disks 1 can be moved.
5 is inserted through the supply pipe group. These may be entirely inserted into one common hole 15b, or may be individually inserted into a plurality of holes. When the holes 15b are combined at one location, the installation of the supply pipe 16 becomes very simple.

The details of the distribution disk 15 will be described with reference to FIG. FIG. 4 is an enlarged axial sectional view of the center of the fixed beam when there are support elements acting in different directions.
A connecting portion 16a of a supply pipe 16 for supplying a pressure medium to the distribution disk 15 is provided on a front surface of each distribution disk 15,
The supply pipe 16 is connected to the groove 15a via the passage hole 15c, and is configured to be detachable at the connection portion 16a.

Although the grooves 15a are provided over the entire outer periphery of the disk, a plurality of grooves 15a may be provided. The distribution disk 15 on the right side in FIG.
5a, this groove 115a is provided with a connecting hole 1 leading to a cylinder 110 which guides the support element 111 on the opposite side.
13 for supplying the pressure medium from the supply pipe 116.

Since the pressure media having different pressures can be supplied to the plurality of grooves 15a and 115a, the supporting elements 11 and 111 can control the pressure applied to the roll shell 3 to different values. It should be noted that the supply pipes connected to these different grooves may be common, and may be configured to apply the same pressing force.

A narrow groove 15d for accommodating the packing ring 25 is provided on the side of each groove 15a, 115a. The packing ring 25 is composed of an O-ring and a return seal pressed against the wall surface of the central hole by its elastic force. The packing ring 25 enables the disc to enter and exit, and simultaneously seals the pressure medium in the groove.

The pressure medium can be supplied to the connection holes 13 and 113 from any position on the outer periphery of the disk.
Circumferential positioning of the disk is not required, and the setting is greatly simplified. In addition, since the internal pressure acting on the fixed beam 2 is limited to the grooves 15a and 115a, the load is significantly reduced as compared with the zone control method, so that the generation of stress due to the differential pressure of the partition wall positioning member, which has been a conventional problem, is eliminated. .

Since the grooves 15a and 115a must be located immediately below the corresponding connection holes 13 and 113, accurate positioning is required. A distance pipe is provided as the positioning member, and this is used as a protection pipe 26 in which a bundle of the supply pipes 16 is provided. When the disk is pulled by the tension rod 24 fixed to the shielding cover 20, the protective tube 26 accurately holds the distance between adjacent disks, and positioning is achieved. The presence of the protective tube 26 facilitates handling during assembly and secures dimensional accuracy of the assembly even when performing maintenance inspection by inserting and removing a thin and weak supply pipe group.

As shown in FIG. 3, the used pressure medium flowing out of the support element 11 flows out of the gap 17 between the shell and the beam, and passes through the center hole 14 through the side hole 2 a formed in the fixed beam 2. And discharged out of the roll under atmospheric pressure. Side hole 2a and distribution disk 15 adjacent to it
And an end protection tube 126 is provided between the separation disk 27 and the roll end disk 28, and is used between the outer surface of the end protection tube 126 and the central hole 14. A cavity 117 is formed through which the pressurized pressure medium passes, and flows into the discharge line 29 through the space 117.

When the water is discharged using such a space 117, the discharge resistance is reduced, and the pressure medium staying in the roll can be reduced. It is to be noted that providing the discharge pipe 29 on the supply pipe 19 side makes the whole apparatus compact.

When the linear pressure distribution adjusting roll 1 having a large number of support elements 11 has a wide range of the same pressing force, it is not always necessary to supply the pressure medium to the individual support elements 11 independently. When adjacent distribution disks can be made of a pressure medium having the same pressure as described above, they can be connected by a connecting capillary as shown in FIG. FIG. 5 is an axially enlarged cross-sectional view of a center portion of a fixed beam according to another embodiment. The passage hole 15c of one distribution disk 15 is connected to the communication hole 15e, and the connecting thin tube 30 detachably connected thereto is connected to the supply pipe connection portion 16a of the other distribution disk 15.

[0039]

As described above, the linear pressure distribution adjusting roll of the present invention has a distribution disk provided around the outer periphery with a groove for supplying the pressure medium sent from the supply pipe to the connection hole. However, the pressure medium can be supplied to each support element individually. For this reason, more precise adjustment of the linear pressure distribution and fine adjustment of the linear pressure distribution in a narrow width become possible. Further, since the pressure medium can be supplied to the connection hole from any position on the outer periphery of the disk, it is not necessary to position the disk in the circumferential direction, maintenance and management are facilitated, and disassembly and inspection are facilitated.

Further, since the pressure medium acting on the fixed beam is limited to the groove portion of the distribution disk, the load is much smaller than that of the zone control system, and the generation of stress due to the differential pressure of the partition wall positioning member is eliminated. In the case where a plurality of grooves are provided and pressure media having different pressures are supplied to the respective grooves, the pressing force of the support element corresponding to each groove can be different. For this reason, it is possible to control the supporting elements in the opposite direction, which have the same pressing force in the conventional zone control method, with an appropriate pressure.

According to the second aspect of the present invention, since the protective tube also serving as the positioning member is provided, the handling at the time of assembling is easy even when a small and weak supply pipe group is taken in and out for maintenance and inspection. And the assembling dimensional accuracy can be secured. Further, since a space for passing the used pressure medium is formed between the outer surface of the end protection tube and the center hole, the discharge resistance is reduced, and the pressure medium staying in the roll can be reduced.

Further, according to the third aspect of the present invention, since a connecting hole for supplying to another adjacent distribution disk and a connecting thin tube connected to the connecting hole are provided, when the range of the same pressing force is wide, the number of supply pipes is reduced. It can be reduced and the configuration can be simplified.

[0043]

[Brief description of the drawings]

FIG. 1 is an axial sectional view of a linear pressure distribution adjusting roll.

FIG. 2 is an enlarged cross-sectional view of a center portion of a fixed beam in a II-II cross section of FIG.

FIG. 3 is an enlarged cross-sectional view on the side of a supply pipeline in a cross section taken along line III-III of FIG. 1;

FIG. 4 is an enlarged axial sectional view of a center portion of a fixed beam having a different direction supporting element.

FIG. 5 is an axially enlarged cross-sectional view of a fixed beam center portion in another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Linear pressure distribution adjustment roll 2 Fixed beam 3 Roll shell 10 Cylinder 11 Support element 13 Connection hole 14 Center hole 15 Distribution disk 15a Groove 15b Hole 15c Passage hole 15e Narrow groove 16 Supply pipe 24 Tension rod 25 Packing ring 26 Protection tube

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-2022 (JP, A) WO 96/36817 (WO, A1) WO 97/355 (WO, A1) (58) Fields surveyed ( Int.Cl. ⁷ , DB name) D21F 3/08 D21G 1/00-1/02 F16C 13/00

Claims (3)

(57) [Claims] 1. A fixed beam, a roll shell rotatably disposed around the fixed beam, and a plurality of rolls urged by a pressure medium flowing through a connection hole formed in the fixed beam to contact the roll shell. A support element, a plurality of supply pipes connected to a supply line at the end of the fixed beam and disposed in a central hole for supplying a pressure medium having a different pressure to the support element, and mounted in the central hole. A partition for inserting the supply pipe, a positioning member for installing the partition at a predetermined position of the central hole, and a lateral hole for drilling a used pressure medium flowing through a space between the fixed beam and the roll shell in the fixed beam. In a linear pressure distribution adjusting roll provided with a drainage means for flowing into a drainage pipe through a space between a supply pipe and a central hole, the partition wall is configured such that a pressure medium sent from the supply pipe is moved to an outer periphery.
A groove is provided around the entire outer periphery to enable supply to the connection hole from the position described above, and a groove is provided on the groove side.
A linear pressure distribution adjusting roll having a distribution disk for enclosing a pressure medium in this groove with a king ring . 2. The partition according to claim 1, wherein the partition includes an isolating disk between the lateral hole and the distribution disk adjacent to the lateral hole, and the positioning member is a protection tube having a bundle of supply pipes provided therein and fixed between the partition. An end protection tube between the isolation disk and the roll end disk, and the drainage means has a space formed between an outer surface of the end protection tube and the central hole for passing used pressure medium. The linear pressure distribution adjusting roll according to claim 1, wherein: 3. The distribution disk according to claim 1, further comprising a communication hole for supplying the pressure medium sent from the supply pipe to the groove to another adjacent distribution disk, and a connection capillary connected thereto. Or the linear pressure distribution adjusting roll according to 2.