JPH09103858A - Roll cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool sealing members and to prolong the life thereof by forming cooling water storage chambers for storing cooling water at the end faces of a roll and providing the cooling water storage chambers with routes to allow the advance of the cooling water concentrically with the sealing members. SOLUTION: A cast billet 2 of a high temp. is drawn while the roll 3 keeps rotating. The cooling water flowing in the cooling water courses 4 penetrating the axial central part of the roll 3 cools the roll 3. Both end faces of the roll 3 are provided with sealing covers 8. The cover parts 81 of the sealing covers 8 are formed with spaces between the axial ends of the roll 3 and the cover parts 81 to form the cooling water storage chambers 14. Hollow grooves 15 communicating with the cooling water storage chambers 14 are disposed near the outer periphery in the diametral direction of the seal rings 9. The cooling water passes the cooling water storage chambers 14 to cool the seal rings 9 and enters the cooling water courses 4, thereby cooling the roll 3. Since the seal rings 9 are cooled from inside, the life of the seal rings 9 increases and the life of bearings lasts long as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cooling rolls of continuous casting equipment or hot rolling equipment in which, for example, high-temperature slabs and slabs come into low-speed rotary contact.

[0002]

2. Description of the Related Art As a conventional roll cooling device, for example,
There is a roll cooling device incorporated in a continuous casting machine as shown in FIG. That is, this continuous casting machine roll cooling device 10
0 indicates that the rolls 102 are in rotary contact with the high temperature slab 101 that is continuously pulled out from the mold part (not shown), and these rolls 102 become high temperature, so cooling that penetrates the axial center part of the roll 102. The water passage 103 is provided, and the roll 102 is cooled by flowing cooling water into the cooling water passage 103.

Then, the roll 1 in which the slab 101 does not contact
A bearing case 104 is provided on the outer circumference of both axial end portions of 02 (hereinafter, the left end shown in the drawing), and the inner circumferential surface of the bearing case 104 and the outer circumference of the end portion of the roll 102. A bearing 105 is provided between the roller 102 and the surface, and the roll 102 is rotatably supported via the bearing 105.

An elbow 106 as a pipe for flowing cooling water is connected to the cooling water passage 103 via a rotary joint 107 on the end surface of the roll 102. Then, the cooling water from the outside is supplied from the elbow 106 to the cooling water passage 103 via the rotary joint 107, and the cooling water passing through the cooling water passage 103 is provided on the other end surface of the roll 102 not shown via the rotary joint. It is discharged to the outside through the elbow that is installed.

Further, a seal member 108 is provided to prevent the cooling water leaking from the elbow 106 from entering the inside of the bearing 105.

This seal member 108 is used for the bearing case 10.
4 is mounted between the inner peripheral surface of the guide member 109 and the outer peripheral surface of the end portion of the roll 102, which forms a seal case mounted on the end surface of the roll 4 by the bolt 111.
The seal lip 110 of 08 makes slidable sealing contact with the outer peripheral surface of the roll 102 to prevent cooling water and scale from entering the inside of the bearing 105 and preventing leakage of lubrication.

FIG. 7 is a sectional view of the rotary joint 107 shown in FIG.
In 07, the inner pipe 107A is connected to the elbow 106, and the inner pipe 107A is connected to the outer pipe 10A via the dry bearing 107B.
7C is rotatably connected. The outer pipe 107C is inserted into the end of the cooling water passage 103 of the roll 102 and fixed to the roll 102. Incidentally, 107D is a seal member for preventing leakage of cooling water, and 107E is a seal member for preventing dust from entering the dry bearing 107B portion.

FIG. 8 shows another conventional example of a roll cooling device used for the same purpose as in FIG. This roll cooling device 200 is a type that does not use a rotary joint,
A bearing case 104 is provided at the axial end of the roll 102 via a bearing 105 to support the roll 102, as in the case of FIG.

Cooling water is supplied from a cooling water storage chamber 113 formed by an integrated dual bearing cover 112 that serves as a seal case for holding the seal member 108 and a cover for covering the axial end surface of the roll 102. Supplied.

Supply of cooling water to the cooling water storage chamber 113
It is supplied from a separately provided cooling water pipe (not shown) through the through hole 112A of the dual-purpose bearing cover 112.

The seal member 108 is interposed between the surface of the shaft of the roll 102 and the bearing cover 112 which also serves as a seal member to prevent the inflow of cooling water from the cooling water storage chamber 113 into the bearing 105 and to prevent the gap between the bearing 105 and the seal member 108. The leakage of the lubricant (grease) 114 in the cooling water storage chamber 113 is prevented.

[0012]

In the conventional roll cooling devices 100 and 200 shown in FIGS. 6 and 8, the high temperature cast slab 101 is used.
Is located up to the bearing portion due to its size, and the high temperature cast slab 1
Radiant heat from 01 heats the bearing case 104, the guide member 109 serving as a seal case, and the bearing cover 112 that also serves as a seal case, which in turn heats and deteriorates the non-metallic seal member 108, so that the lubricant 114 flows out. In addition, cooling water enters the bearing. As a result, the bearing 105 is damaged, rotation failure of the roll 102 occurs, and the slab 101 is damaged.

Moreover, the deviation of the rotation axis of the roll 102 causes cooling water leakage, and when the cooling water is applied to the high temperature cast piece 101, the cast piece 101 is cracked.

Further, in the roll cooling device 100 shown in FIG. 6, the elbow 106 which is a cooling water pipe and the roll 102 are connected by the rotary joint 107 shown in FIG. 7, and the dry bearing 107B of the rotary joint 107 is unevenly worn. Therefore, the rotation failure of the roll 102 occurs, and as a result, the slab 101 is damaged, and further, due to the deviation of the rotation axis of the roll 102, the elbow 106 of the rotary joint 107 is damaged, and cooling water leakage occurs, causing A crack is generated in the piece 101. Trouble of continuous casting machine,
If the rotary joint 107 is replaced earlier in anticipation of deterioration of the quality of the cast slab 101, the rotary joint 10
In addition to the cost increase of 7, the productivity is lowered due to the stoppage of the casting machine.

On the other hand, in the roll cooling device 200 shown in FIG. 8, the cooling water storage chamber 113 is normally passed through the through hole 112A.
The cooling water supplied to the cooling water is dirty because it is industrial water and the pressure is high (4 to 5 kg / cm ² ).
3, the seal member 108 for preventing the intrusion of the cooling water from the bearing 105 into the bearing 105 is worn out in a short period of time, and the cooling water leaks to the bearing 105 side in the vicinity thereof, so that the bearing 1
05 will be destroyed in a short period of time.

Therefore, the problem to be solved by the present invention is as follows:
The purpose is to extend the life of the bearing, and one of them is to provide a roll cooling device that can reliably cool the inside of the roll in order to protect the bearing of the roll from heat transfer from the slab. .

[0017]

In order to achieve the above object, according to the present invention, a roll is rotatably supported on the outer peripheral surface of both axial ends of a roll having a cooling water passage axially penetrating the inside thereof. And a cylindrical seal member for preventing the inflow of cooling water by abutting the inner peripheral surfaces of the bearing case and the outer peripheral surfaces of both ends of the roll on the roll end side of the bearing case. A seal case that abuts and holds the outer peripheral surface of the seal member, a bearing cover that forms a cooling water storage chamber that covers the roll end surface on the roll end side of the seal case and stores cooling water, and the seal case, It is characterized in that a passage communicating with the cooling water storage chamber is provided concentrically with the sealing member so that cooling water that suppresses heat transfer to the radial outer peripheral surface of the sealing member can enter.

The passage formed in the seal case is
It is preferable to reach a position corresponding to the outer peripheral surface width of the seal member.

In order to achieve the above object, in another invention, a cylindrical bearing for rotatably supporting the roll on the outer peripheral surfaces of both ends in the axial direction of the roll having a cooling water passage axially penetrating the inside thereof. And a cylindrical seal member that abuts the inner peripheral surface of the bearing case provided on the outer peripheral surface of both ends of the roll on the roll end side of the bearing case to seal the gap therebetween. A seal case that abuts and holds a surface, an insert member that is inserted into the cooling water passage and has a communication passage that communicates the cooling water passage and the outside, an outer peripheral surface of the insertion member, and the cooling water passage. And a cooling water passage sealing member for sealing the gap between the inner peripheral surfaces.

In this roll cooling device, a bearing cover which covers the roll end side of the seal case and at least covers the roll end face, and a communication hole which is provided in the bearing cover and which communicates the chamber with the outside. A second communication passage that is provided in the bearing cover and that is not in communication with the chamber and that communicates the outside with a communication passage of the insertion member may be provided.

It is also possible to provide a dual-purpose bearing cover in which the seal case and the bearing cover are integrated.

In the roll cooling device having the above structure, both end faces of the roll are covered with the bearing covers to form the cooling water storage chamber between the end faces and the seal case holding the seal member is connected to the seal member. Since the passage for suppressing heat transfer is provided concentrically with the seal member to communicate with the cooling water storage chamber, the cooling water flows from the cooling water storage chamber to the passage. That is, since the cooling water flows to the vicinity of the seal member, the seal member can be surely cooled from the inside. As a result, the adjacent bearings can be protected from heat transfer from the slab.

Further, by setting the passage to a position corresponding to the outer peripheral width of the seal member, the seal member can be cooled more reliably.

In the roll cooling device having the structure according to another invention, the cooling water flows from the outside to the cooling water passage inside the roll through the communication passage provided in the insertion member. That is,
Since the cooling water does not flow to the seal member side near the bearing,
This roll cooling device is applied when the bearing portion does not reach a high temperature due to the heat of the slab.

When the cooling water is industrial water, it is usually
The cooling water is dirty and the pressure is high (4-5 kg / cm ² )
However, the cooling water passage sealing member provided between the outer peripheral surface of the insertion member and the inner peripheral surface of the cooling water passage prevents leakage of industrial water to the outside. Therefore, the dirty cooling water under the pressure does not flow directly to the seal member near the bearing.

As a result, the wear of the seal member is reduced and the life of the seal member is extended. Along with this, the life of nearby bearings will be extended.

Even if industrial water passes through the cooling water passage seal member and flows out to the roll end face side, a chamber is formed by the bearing cover and a communication hole is provided for communicating the chamber with the outside. The industrial water is discharged to the outside through the communication hole through the chamber. As a result, there is no direct flow to the seal member near the bearing.

A communication passage for flowing the cooling water from the outside to the cooling water passage is provided in the bearing cover and the insertion member, and since the communication passage is not communicated with the chamber, the cooling water is the cooling water in the normal use state. It does not flow into the chamber and flow out of the communication hole of the bearing cover without flowing into the passage.

Further, by providing the dual-purpose bearing cover in which the seal case and the bearing cover are integrated, the number of parts is reduced and the manufacture can be facilitated.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiment. In FIG. 1 showing a roll cooling device according to an embodiment of the present invention, 1 indicates the entire roll cooling device of a continuous casting machine, which is a high temperature slab 2 that is continuously drawn from a mold part (not shown). Since the rolls 3 are rotationally contacted with each other and these rolls 3 are heated to a high temperature, there is a cooling water passage 4 which penetrates the axial center portion inside the roll 3, and the cooling water is caused to flow in the cooling water passage 4. The roll 3 is designed to be cooled.

The central portion of the roll 3 in the axial direction has the largest diameter at the portion where the cast piece 2 comes into rotational contact, and the large diameter portion 31
From the first axial direction to the third axial direction, the diameter gradually decreases from the first axial direction to the third axial direction. Each third small diameter portion 34 has the smallest diameter at the end.

Then, the first and second small diameter portions 3 of the roll 3
A bearing case 5 having a substantially rectangular cross-section over the outer circumferences of 2, 33.
Are provided respectively. The bearing cases 5 are brought into contact with each other via a seal member embedded in the recess 51 of the first small diameter portion 32 provided inward in the radial direction, and the lubricant 20
Are prevented from leaking, and a bearing 6 is provided between an inner peripheral surface facing the second small diameter portion 33 and an outer peripheral surface of the second small diameter portion 33, and the roll 3 rotates via the bearing 6. It is supported.

In each of the bearings 6, the axially inner end surface abuts on the stepped end surface 52 of the inner peripheral surface of the bearing case 5 and the step surface 35 of the second small diameter portion 33, and the axially outer side of the second small diameter portion 33. It is positioned in the axial direction by coming into contact with a retaining ring 7 provided on the outer periphery. At the same time, the bearing case 5 is prevented from coming off in the axial direction.

The both end surfaces of the roll 3 are provided with dual-purpose bearing covers 8 which cover the end surfaces and are attached to the end surfaces of the respective bearing cases 5.

The dual-purpose bearing cover 8 serves as both a seal case and a bearing cover, which will be described later, and the roll 3
Has a cover portion 81 forming a bearing cover that covers the end surface of the third small diameter portion 34 and the outer peripheral surface of the third small diameter portion 34 at a predetermined distance.
The outer peripheral side of the portion of the cover portion 81 which covers the outer peripheral surface of the third small diameter portion 34 extends radially outward and is thick in the axial direction, and this portion is attached to the end surface of the bearing case 5. It is a mounting portion 82 that forms a seal case.

A protruding portion 83 protruding from the inner peripheral end on the axially inner side of each mounting portion 82 toward the outer peripheral surface of the third small diameter portion 34.
Respectively. The inner circumference of each protruding portion 83 is
An annular recess 84 that opens to the outer peripheral surface of the third small diameter portion 34.
Is provided.

The inner peripheral surface of the annular recess 84 and the third small diameter portion 3
A seal ring 9 as a seal member that seals the annular gap is mounted between the outer peripheral surfaces of 4. The seal ring 9 is of a combination type in which a resin ring made of a heat-resistant resin material such as fluororesin and a rubber ring made of a heat-resistant rubber material such as fluororubber are combined in the annular radial direction. That is, in the annular recess 84,
The rubber ring is mounted on the outer side in the radial direction and the resin ring is mounted on the inner side in the radial direction, and the resin ring serves as a sliding surface.

Of course, the seal member is not limited to the seal ring 9, but, for example, one having a seal lip shown in the prior art can be used, and various other known seal members can be applied.

Furthermore, the cover portion 81 forms a space between the cover 3 and the axial end portion of the roll 3, and this space serves as a cooling water storage chamber 14 for supplying cooling water to the cooling water passage 4 of the roll 3. In addition, the vicinity of the seal ring 9 can be cooled.
That is, the roll 3 in the protruding portion 83 of the dual-purpose bearing cover 8
The shaft end side of the double groove also serves as a side wall of the cooling water storage chamber 14, and the concave groove 15 communicates with the cooling water storage chamber 14 as a passage for suppressing heat transfer even in the vicinity of the radial outer peripheral surface of the seal ring 9. It is provided concentrically with the seal ring 9.

In the dual-purpose bearing cover 8 thus configured, the mounting portions 82 are screwed and fixed to the end faces of the bearing cases 5 with the bolts 10, respectively. still,
The means for attaching the dual-purpose bearing cover 8 to the bearing case 5 is not limited to the screw-fixing with the bolts 10, but may be rivets for example.

Further, the cover portion 8 of the bearing cover 8 for dual use
The shaft center portion 1 has a through hole 85 penetrating in the axial direction, and an elbow 11 as a pipe through which cooling water passes is attached to each through hole 85. In the present embodiment, the threaded portion 85A is formed on the inner peripheral surface of the through hole 85 and the outer peripheral surface of the elbow 11.
And 11A, and these screw parts 85A, 11A
Therefore, each elbow 11 is screwed and fixed to each through hole 85.

The second embodiment is shown in FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals. FIG.
2 is different from the embodiment shown in FIG. 2 in that the seal case and the bearing cover are integrated in FIG. 1, whereas the seal case and the bearing cover are separately provided in FIG. Here is an example.

That is, in FIG. 2, similarly to FIG. 1, the bearing 6
Is attached to the second small diameter portion 33 at the shaft end of the roll 3 by the bearing case 5, and the entire roll 3 is
And the third end of the second small diameter portion 33
The seal ring 9 is attached to the outer peripheral surface of the small diameter portion 34 by fitting the seal ring 9 into the annular recessed groove 12 </ b> A facing the third small diameter portion 34 of the seal case 12. Further, the bearing cover 13 that covers the end surface of the roll 3 and the end surface of the seal case 12 is
The space for forming the cooling water storage chamber 14 is provided between them.

In such a structure, the seal case 12
The groove 15 communicating with the cooling water storage chamber 14 is provided concentrically with the seal ring 9, and the depth of the groove 15 does not correspond to the width (axial direction) of the seal ring 9. The vicinity of the ring 9 can be cooled by the water supplied to the cooling water storage chamber 14. The bearing cover 13 and the seal case 12 are provided with screws so that they can be simultaneously attached to the bearing case 5 with bolts 10.

The third embodiment is shown in FIG. The third embodiment is different from the second embodiment in that the seal case 12
Of the third small diameter portion 34 is made flat without providing the annular concave groove 12A, and the third small diameter portion 34 facing the flat portion is formed with an annular concave portion 341 opening to the flat surface side. The seal ring 9 is fitted so as to seal between the flat portion.

Since the other structure and operation are the same as those of the second embodiment, the same components are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

In the roll cooling device having each of the above configurations,
Since the elbow 11 through which the cooling water flows is attached to the through holes 85 of the dual-purpose bearing cover 8 and the bearing cover 13 (not shown in FIGS. 2 and 3), the elbow 11 on the left side in the drawings.
The cooling water from the cooling water passage 4 can be supplied to the cooling water passage 4 through the cooling water storage chamber 14 formed by the bearings 8 and 13 and the cooling water that has passed through the cooling water passage 4 It can be flowed to the elbow 11 through the inside of the bearing covers 8 and 13 and discharged to the outside.

At this time, the protruding portion 83 of the dual-purpose bearing cover 8 and the recessed groove 15 communicating with the cooling water storage chamber 14 of the seal case 12 which have been previously processed also flow sequentially, cooling the seal ring 9 and increasing the temperature. Does not deteriorate. Therefore, the life of the bearing 6 can be extended, the cooling water can be prevented from leaking, and the cooling water can be prevented from being scattered on the high temperature cast piece 2.

In the third embodiment, the seal ring 9
Is fitted into the annular recess 341 of the third small diameter portion 32, the seal case 12 can be reduced in size in the radial direction by that amount.
This device can be used even when there is no space in the seal case 12.

The fourth embodiment is shown in FIG. In FIG. 4, the same components as those in each of the above-described embodiments are designated by the same reference numerals, and the present embodiment will be described.

The present embodiment is applied when there is no space in the seal case and the concave groove 15 cannot be provided on the radial outer peripheral surface side of the seal ring 9.

First, the roll 3A according to the present embodiment is
In the case of the split type, in the illustrated portion, a first roll portion 31A forming an axial center portion, and a second roll shorter than the first roll portion 31A and provided on the outer peripheral surface and to which the bearing 6 is attached The portion 32A and the outer peripheral surface of the first roll portion 31A, which are liquid-tightly screwed to the axially outer end surface of the second roll portion 32A via the O-ring 16 which is a seal member. It has three roll portions 33A.

The end faces of the first and third roll portions 31A, 33A of the roll 3A are substantially flush with each other. The end face side is covered with the end face, and the end face of the bearing case 5 is formed with a bearing cover. The dual-purpose bearing cover 8 having the mounting portion 82 that forms the seal case with the portion 81 is provided.

On the inner periphery of the mounting portion 82 of the dual-purpose bearing cover 8, a plurality of annular recesses 84A, which are open to the outer peripheral surface of the third roll 33A, are arranged side by side at a predetermined interval in the axial direction (in this embodiment). 2 pieces are provided in the form.

A seal ring 9 as a sealing member for sealing the annular gap is mounted between the peripheral surface of each annular recess 84A and the outer peripheral surface of the third roll portion 33A.

Further, the cover portion 81 forms a space between the first and third roll portions 31A and 33A and the axial end portions thereof to form the cooling water storage chamber 14, and the vicinity of the seal ring 9 is formed. It can be cooled.

The radially outer side of the cooling water storage chamber 14 has a water hole 15A axially formed therethrough as a passage for suppressing heat transfer in the vicinity of the radially outer circumferential surface of the seal ring 9 as well. And is provided concentrically with the seal ring 9.

A plurality of water holes 15A are provided in the circumferential direction, and the opening end of the bearing 6 side is closed by the plug 17 so that the cooling water does not flow out to the bearing 6 side.

Further, the mounting portion 82 is provided with a drain port 18 for discharging the cooling water, which has passed through the seal ring 9 on the left side in the drawing and flown between the seal ring 9 on the right side in the drawing, to the outside. It is formed to penetrate in the radial direction. The drain port 18 is normally closed by a bolt or the like as shown in the figure.

Reference numeral 19 in the drawing denotes a pipe for supplying the cooling water from the elbow 11 to the cooling water passage 4 and the cooling water storage chamber 14.

In the present embodiment, since the water hole 15A is provided in the mounting portion 82 of the dual bearing case 8 as a passage communicating with the cooling water storage chamber 14, the above-described respective embodiments are shown. Even when there is no space in the radial direction where the groove 15 cannot be provided as a passage,
The seal ring 9 can be reliably cooled from the inside.

The fifth embodiment is shown in FIG. In FIG. 5, the same components as those in each of the above-described embodiments are designated by the same reference numerals, and the present embodiment will be described.

This embodiment is applied to the case where the bearing portion does not reach a high temperature due to the heat of the slab 2 such that the slab 2 at high temperature has a very small width and is located far from the bearing portion. is there.

First, this embodiment is based on the above-mentioned second embodiment.
Similar to 3, the seal case and the bearing cover are separately provided. The inner peripheral portion of the seal case 12B has a step portion 12C that opens to the outer peripheral surface side of the roll 3B,
The step portion 12C is provided with an oil seal 91 having a seal lip that makes a sealing contact with the outer peripheral surface of the roll 3B as a seal member that seals the gap between the peripheral surface and the outer peripheral surface of the roll 3B.

The seal member is not limited to the oil seal 91, and various other known seal members can be used as shown in the first embodiment.

Further, the end face side of the roll 3B is covered with the end face, and the end face of the seal case 12B is provided with an elbow-integrated bearing cover 13A integrated with an elbow as a pipe through which cooling water from the outside is attached by a bolt (not shown). It is provided.

The elbow-integrated bearing cover 13A also serves as an insertion member to be inserted into the cooling water passage 4 inside the roll 3B.

The elbow-integrated bearing cover 13A has a cover portion 81 which forms a bearing cover for covering the end surface of the roll 3B at a predetermined distance, and the outer peripheral side of the cover portion 81 is thick in the axial direction. That portion is a mounting portion 82A that is mounted on the end surface of the seal case 12B.

An insert portion 13B forming an insert member is integrally provided at the radial center of the cover portion 81, and an elbow 11 is integrally provided on the opposite side thereof, whereby the insert member is provided. Combined elbow bearing cover 13A
And

The insertion portion 13B has a communication passage 21 which communicates with the cooling water passage 4. The communication passage 21 and the elbow 1 are connected to each other.
Second communication passage 22 communicating with passage 11B through which the first cooling water passes
Is provided on the cover portion 81. The communication passage 21, the second communication passage 22, and the passage 11B are continuously and integrally provided in the elbow-integrated bearing cover 13A as shown in the figure.

Reference numeral 19 in the drawing denotes a pipe which is mounted in the communication passage 21. The pipe 11B, the second communication passage 22, and the communication passage 2 are provided from the outside.
It is for supplying the cooling water passing through 1 to the cooling water passage 4.

On the outer periphery of the insertion portion 13B, a plurality of annular recesses 13C which are open to the inner peripheral surface of the cooling water passage 4 are arranged at predetermined intervals in the axial direction (in the present embodiment, 2).
) Are provided.

A seal ring 23 as a cooling water passage sealing member for sealing an annular gap between the peripheral surface and the inner peripheral surface of the cooling water passage 4 is fitted in each annular recess 13C. This seal ring 23 is a combination of a resin ring and a rubber ring, like the seal ring 9 shown in the first embodiment.

Of course, the seal member is not limited to the seal ring 23, and various other known seal members can be used. Also, the number is not limited to two. Further, the seal member is not limited to being provided on the outer peripheral surface side of the insertion member, but may be provided on the inner peripheral surface side of the cooling water passage.

The cover portion 81 has a predetermined distance from the end surface of the roll 3B, and has the mounting portion 82A on the outer peripheral side and the insertion portion 13B on the radial center portion. A space is formed, and the space forms a chamber 24.

Further, the mounting portion 82A has a communication hole 25 communicating with the outside and the chamber 24 formed through in the radial direction.

In the present embodiment, the cooling water flows from the outside to the cooling water passage 4 via the passage 11B in the elbow-integrated bearing cover 13A, the second communication passage 22 and the communication passage 21.
That is, since the cooling water does not flow into the chamber 24 and does not flow toward the oil seal 91 near the bearing 6, this roll cooling device 1 is applied when the bearing portion does not reach a high temperature due to the heat of the cast slab. .

When the cooling water is industrial water, it is usually
The cooling water is dirty and the pressure is high (4-5 kg / cm ² )
However, the seal ring 23 provided between the peripheral surface of the annular recess 13C of the insertion portion 13B and the inner peripheral surface of the cooling water passage 4
Therefore, leakage of industrial water to the outside is prevented. Therefore, the dirty cooling water under the pressure does not flow directly to the oil seal 91 near the bearing 6.

As a result, the wear of the oil seal 91 is reduced and the life of the oil seal 91 is extended. Along with this, the life of the bearing 6 in the vicinity is extended, and the life of the bearing 6 is extended.

Even if industrial water passes through the seal ring 23 and flows out into the flow chamber 24 toward the end face of the roll 3B, the chamber 24 is at atmospheric pressure and the communication hole 25 for communicating the chamber 24 with the outside. Due to the provision of the above, the industrial water is discharged from the communication hole 25 to the outside. Therefore, the oil does not directly flow to the oil seal 91 near the bearing 6.

Since the industrial water can be drained from the communication hole 25 in this manner, the life of the oil seal 91 can be extended as described above, and the life of the bearing 6 can be extended accordingly.

In the present embodiment, the elbow-integrated bearing cover 13A which also serves as an insertion member has been described as an example of the bearing cover forming the chamber 24, but the elbow, the bearing cover and the insertion member are individually provided. The chamber may be formed by the bearing cover. In this case, the second communication passage provided in the bearing cover needs to be in non-communication with the chamber so that the cooling water does not flow into the chamber.

Although the above description is of the roll cooling water device for the continuous casting machine, it is also applicable to a roll cooling device such as a hot rolling mill.

[0084]

The present invention has the above-described structure and operation, and covers both end surfaces of the roll with bearing covers to form a cooling water storage chamber between the end surfaces and a seal case for holding the seal member. Since the passage for suppressing heat transfer to the seal member is provided so as to be concentric with the seal member and communicate with the cooling water storage chamber, the seal member can be reliably cooled from the inside. For this reason, the life of the seal member is extended, the life of the bearing is extended, and there is no water leakage to prevent deterioration of the seal member, preventing deterioration of the quality of high temperature products such as cast slabs, hot rolled materials, etc. It also has the effect of reducing the cost of parts such as bearings, and reducing the equipment outage due to replacement.

Further, by setting the passage to a position corresponding to the outer peripheral width of the seal member, the above effect can be further achieved.

According to another invention, since the cooling water does not flow to the seal member side near the bearing, it is applied when the bearing portion does not reach a high temperature due to the heat of the cast slab.
Since the cooling water passage sealing member for sealing the gap between the outer peripheral surface of the insertion member inserted in the cooling water passage and the inner peripheral surface of the cooling water passage is provided, the cooling water is pressurized (for example, 4 to
5 kg / cm ² ) Even if dirty cooling water, so-called industrial water, is used to protect the outside of the industrial water with the cooling water passage sealing member provided between the outer peripheral surface of the insertion member and the inner peripheral surface of the cooling water passage. Leakage is prevented. Therefore, the dirty cooling water under the pressure does not flow directly to the seal member near the bearing.

As a result, the wear of the seal member is reduced, so that the life of the seal member can be extended. Along with that, the life of the bearings in the vicinity is extended, and the life of the bearing can be extended.

Even if industrial water passes through the cooling water passage seal member and flows out to the roll end face side, a chamber is formed by the bearing cover and a communication hole for communicating the chamber with the outside is provided. The industrial water is discharged to the outside through the communication hole through the chamber. Therefore, it does not flow directly to the seal member near the bearing.

As described above, the industrial water can be drained from the communication hole, so that the life of the seal member can be extended and the life of the bearing can be extended accordingly.

Further, by providing the dual-purpose bearing cover in which the seal case and the bearing cover are integrated, the number of parts can be reduced and the manufacturing can be facilitated.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a continuous casting machine roll cooling device as a roll cooling device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a roll cooling device according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts of a roll cooling device according to a third embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of a roll cooling device according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part of a roll cooling device according to a fifth embodiment of the present invention.

FIG. 6 is a half cross section of a conventional continuous casting machine roll cooling device.

7 is a cross-sectional view of the rotary joint in FIG.

FIG. 8 is a cross-sectional view of a main part of another conventional roll cooling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous casting machine roll cooling device 2 Cast slab 3,3A, 3B roll 31 Large diameter part 32 1st small diameter part 33 2nd small diameter part 34 3rd small diameter part 35 Step surface 31A 1st roll part 32A 2nd roll part 33A No. 3 Roll part 4 Cooling water passage 5 Bearing case 51 Recessed part 52 Step end face 6 Bearing 7 Retaining ring 8 Combined bearing cover 81 Cover part (bearing cover) 82 Mounting part (seal case) 82A Mounting part 83 Projection part 84, 84A Annular recessed part 85 through hole 85A screw part 9 seal ring (seal member) 91 oil seal (seal member) 10 bolt 11 elbow 11A screw part 11B passage 12, 12B seal case 12A annular groove 12C step 13 bearing cover 13A elbow integrated bearing cover 13B Insertion part (insertion member) 13C Annular recess 14 Cooling water storage chamber 15 Recessed groove (through 15A Water hole (passage) 16 O-ring 17 Plug 18 Drain port 19 Piping 20 Lubricant 21 Communication passage 22 Second communication passage 23 Seal ring (cooling water passage sealing member) 24 Chamber 25 Communication hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshimi Iida, Yoshimi Iida, No. 8 Zokuhori, Nagaigawa, Fukushima City, Fukushima Prefecture, NK Fukushima Factory (72) Inventor, Yasuhiro Tashiro, 1850 Minato, Wakayama City, Wakayama Sumitomo Metal Industries, Ltd. Company Wakayama Works (72) Inventor Shuji Iida 1850 Minato, Wakayama Prefecture Wakayama Sumitomo Metal Industries Co., Ltd.Wakayama Works Co., Ltd. (72) Inventor Nagata 1850 Minato Wakayama, Wakayama Sumitomo Metal Industries Wakayama Works ( 72) Inventor Toshikazu Furuya 1850 Minato, Wakayama, Wakayama Sumitomo Metal Industries, Ltd. Wakayama Works

Claims (5)

[Claims] 1. A bearing case provided with a cylindrical bearing for rotatably supporting the roll on the outer peripheral surface of both ends in the axial direction of the roll having a cooling water passage penetrating the inside in the axial direction; On the outer peripheral surface of both ends of the roll on the roll end side,
A seal case that holds a cylindrical seal member that abuts its inner peripheral surface to prevent the entry of cooling water by abutting the outer peripheral surface of the seal member, and cools the roll end surface on the roll end side of the seal case. A bearing cover that forms a cooling water storage chamber that stores water, and the seal case has a passage that communicates with the cooling water storage chamber such that cooling water that suppresses heat transfer to the radial outer circumferential surface of the seal member can enter the cooling water storage chamber. A roll cooling device provided concentrically with the seal member. 2. The roll cooling device according to claim 1, wherein the passage formed in the seal case extends up to a position corresponding to the width of the outer peripheral surface of the seal member. 3. A bearing case provided with a cylindrical bearing for rotatably supporting the roll on the outer peripheral surface of both ends in the axial direction of the roll having a cooling water passage penetrating the inside in the axial direction; On the outer peripheral surface of both ends of the roll on the roll end side,
A seal case for abutting and holding a cylindrical seal member that abuts the inner peripheral surface of the seal member and seals a gap between the inner peripheral surface and the outer peripheral surface of the seal member; A roll comprising: an insert member having a communication passage communicating with the outside; and a cooling water passage seal member for sealing a gap between the outer peripheral surface of the insertion member and the inner peripheral surface of the cooling water passage. Cooling system. 4. The roll cooling device according to claim 3, wherein a bearing cover that covers a roll end side of the seal case and at least a roll end face is formed, the bearing cover is provided in the bearing cover, and the chamber and the outside are provided. And a second communication passage that is provided in the bearing cover and is not in communication with the chamber and that communicates the outside with a communication passage of the insertion member. apparatus. 5. The roll cooling device according to claim 1, further comprising a dual-purpose bearing cover in which the seal case and the bearing cover are integrated.