JPH105955A - Bearing structure of guide roll in continuous casting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity of continuous casting by arranging a grease supply hole between a roll shaft mounting hole and set bolt mounting screw hole and arranging a through hole in the center part of set bolt and further a connecting port of grease supply pipe in a wrench applying part. SOLUTION: Grease is supplied by a centralized grease supply device in continuous casting. Because a grease supply pipe 20 is arranged on the rear face of a frame 1, grease is free from thermal effect of a slab and is not deteriorated or carbonized. The grease supplied in a roll bearing mounting hole 13 is used for lubrication by rotation of a roll shaft 11, the old grease after used, every time a new grease is supplied, is discharged from a grease discharge pipe 21 through a through hole 18 between the roll bearing mounting hole 13 and set bolt mounting screw hole 15 at grease discharge side and a through hole 18 of set bolt 5 at grease discharge side. This grease discharge route is not affected directly by thermal effect of slab, grease is not deteriorated or carbonized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing structure of guide rolls arranged below a mold of a continuous casting machine.

[0002]

2. Description of the Related Art As is well known, in a continuous steel casting machine, a number of guide rolls are arranged below a mold, and a slab pulled out from a lower portion of the mold by a pinch roll is bulged (bulged). ) And guides it through the secondary cooling zone to the slab cutter.

The above-mentioned guide rolls are usually formed into roll segments each having a plurality of guide rolls, and are incorporated in a continuous casting machine. The basic structure of this roll segment is disclosed in, for example, Japanese Utility Model Application Laid-Open No. Sho 42-42758. For example, as shown in FIG. They are arranged so as to be orthogonal to the pulling-out direction of the pieces, and the roll faces are opposed to each other, and the four corners of the frames 31, 32 are connected by tie rods. In this case, the guide roll 33 is attached to the frames 31 and 32 as shown in FIG.
And set bolts 38 in the through holes 36 and 37 of the water cooling jacket 35
Into the mounting screw holes 40 of the set bolts 38 formed in the bearing box 39 to mount the bearing box 39.
This is performed by attaching a roll bearing 42 to the roll bearing mounting hole 41.

[0004]

By the way, the above bearing housing
As shown in FIG. 3, the greasing of the grease to the roll bearing 42 of the roll 39 is usually performed by forming a greasing hole 43 communicating with the roll bearing mounting hole 41 in the bearing box 39. The grease pipe (greasing pipe) 44 is connected, but the grease in the greasing pipe 44 may be deteriorated or carbonized because the greasing pipe 44 is affected by slab heat during continuous casting. . Further, for this reason, there is a problem that good quality grease cannot be sufficiently supplied into the roll bearing mounting hole 41 and the life of the roll bearing 42 cannot be completed. On the other hand, the roll bearing mounting hole
The old grease supplied to 41 is pushed out from between the dust seal 45 and the roll shaft 46 and is discharged out of the bearing box 39.Therefore, the discharged grease may burn due to the influence of slab heat, As a result, the life of the dust seal 45 is short. There is also a problem that the dust seal 45 is sometimes welded to the roll shaft 46.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and one of the objects is to supply high-quality grease by preventing deterioration or carbonization of grease supplied to a bearing housing. Another object of the present invention is to provide a high quality grease by preventing the deterioration or carbonization of grease supplied to a bearing box by preventing the grease from being supplied to a bearing box. At the same time, an object of the present invention is to provide a bearing structure of a guide roll of a continuous casting machine that can replace old and new grease without discharging old grease from between a dust seal and a roll shaft.

[0006]

In order to achieve the above-mentioned object, a bearing structure for a guide roll of a continuous casting machine according to the present invention comprises: In a bearing structure of a guide roll of a continuous casting machine in which a bearing box is mounted by being screwed into a mounting screw hole of a set bolt formed in the bearing box and inserted into the bearing box, a roll bearing mounting hole of the bearing box and a mounting screw hole of the set bolt are provided. And a through hole at the center of the set bolt, and a greasing pipe connection port at the spanner hook.

In addition to the bearing structure of the guide roll of the continuous casting machine according to the first aspect of the present invention, a grease drainage through hole is provided between the roll bearing mounting hole of the bearing box and the mounting screw hole of another set bolt. At the same time, a through hole may be provided at the center of the set bolt, and a drainage pipe connection port may be provided at the spanner hook.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a bearing structure of a guide roll of a continuous casting machine according to the present invention, wherein a is a cross-sectional view of a main part of the front, b is a cross-sectional view of XX of a, A frame 2, a water-cooled jacket, a guide roll 3, a bearing box 4 for a guide roll, and a set bolt 5 are shown.

The frame 1 has the same structure as that conventionally used. The frame 1 is formed in a box shape, and a number of reinforcing members 7 are erected and fixed by welding to form a reinforcing structure. A through hole 8 for inserting the set bolt 5 is provided at a position where the bearing box 4 of the guide roll 3 is mounted.

The water-cooling jacket 2 has the same structure as that conventionally used, and has a cooling water passage 9 therein.
The cooling water is flowed during continuous casting to reduce the thermal effect of the slab on the frame 1. The water cooling jacket 2 is also provided with a through hole 10 for inserting the set bolt 5. Have been.

The bearing housing 4 includes a roll shaft 11 of the guide roll 3.
A roll bearing mounting hole 13 for accommodating the bearing 12 mounted on the base member 14 is provided, and a mounting screw hole 15 for the set bolt 5 is provided at two lower portions of the base portion 14. Through holes 16 and 17 are formed between the set bolt mounting screw holes 15.

The set bolt 5 has a through hole 18 at the center along the center axis, and a grease pipe (greasing pipe) 20 [or an old grease drain pipe 21] at the center of the spanner hook 19. A female screw for screwing into the set bolt mounting screw hole 15 is formed at the outer peripheral end.

The guide roll 3 is assembled to the frame 1 by aligning the through hole 8 of the frame 1 with the through hole 10 of the water cooling jacket 2 and setting the water cooling jacket 2 on the frame 1. After the bearing box 4 having the guide roll 3 assembled thereon is provided with the through hole 10 and the set bolt mounting screw hole 15 aligned with each other, the set bolt 5 is inserted through the through hole 8 of the frame 1. The grease pipe is connected to the female screw of the spanner hook 19 of the set bolt 5 on the greasing side by screwing into the set bolt mounting screw hole 15 and fixed. Grease is supplied from a grease device (not shown). A drain pipe 21 is connected to the female screw of the spanner hook 19 of the set bolt 5 on the drain side to discharge old grease used for lubricating the roll bearing 12 in the roll bearing mounting hole 13. When the old grease is greased using the grease drain pipe 21 as described above, the lip of the dust seal 23 provided on the roll side of the roll bearing 12 is set toward the roll bearing 12, and the grease is applied to the roll shaft 11 and the dust seal. twenty two,
It is necessary not to discharge from between 23 and 24.

In the bearing structure of the guide roll of the continuous casting machine having the above structure, grease is supplied by the centralized greasing device during continuous casting. However, since the greasing tube 20 is provided on the back surface of the frame 1, The grease is not directly affected by the heat from the slab, and the grease does not deteriorate or carbonize in the greasing pipe 20. The feed from the greasing pipe 20 to the roll bearing mounting hole 13 of the bearing box 4 is supplied through the through hole 18 of the set bolt 5 and further through the through hole 16 of the bearing box 4.
Also, the grease is not directly affected by heat from the slab even in the through hole 16 and there is no fear that the grease is deteriorated or carbonized. The grease supplied into the roll bearing mounting hole 13 in this manner is used for lubrication by rotation of the roll shaft 11, and the old grease after use is replaced with the roll bearing mounting hole 13 every time new grease is supplied. The oil is discharged from the grease drain pipe 21 through a through hole 17 between the grease and the set bolt mounting screw hole 15 on the grease side and a through hole 18 of the set bolt 5 on the grease discharge side. The grease drain path (through hole 17, through hole 18, and drain tube 21) is also
Grease greasing path (greasing pipe 20, through hole 18, and through hole 1
As in the case of 6), there is no direct influence of heat from the slab, so there is no risk of grease deterioration or carbonization. Thus, lubrication and drainage of grease into the roll bearing mounting hole 13 of the bearing housing 4 can be performed smoothly.

In the above embodiment, the set bolt 5
In the above description, one of the guide rollers 3 is used as a grease supply path and the other is used as a grease drain path. The grease may be drained only between the dust seals 22 and 23 provided in front of the roll bearing 12 (on the roll side) and the roll shaft 11 as in the related art.

[0016]

As described above, according to the bearing structure of the guide roll of the continuous casting machine according to the present invention, there is no fear that the grease is deteriorated or carbonized in the greasing pipe, and the inside of the roll bearing mounting hole of the bearing box is reduced. The grease can be smoothly supplied to and drained from the grease, and trouble in the roll bearing portion can be reduced. In addition, the service life of the roll bearing and the dust seal can be improved, and the productivity of continuous casting can be increased.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a bearing structure of a guide roll of a continuous casting machine according to the present invention, wherein a is a cross-sectional view of a main part of the front, and b is a cross-sectional view of XX of a.

FIG. 2 is an overall view of a guide roll segment of the continuous casting machine.

FIG. 3 is an explanatory view of a bearing structure of a guide roll of a conventional continuous casting machine.

[Explanation of symbols]

1: Frame 2: Water-cooled jacket
3: Guide roll 4: Bearing box 5: Set bolt
6: Steel plate 7: Reinforcement material 8, 10: Through hole
9: Cooling water flow path 11: Roll shaft 12: Bearing 1
3: Roll bearing mounting hole 14: Foundation 15: Mounting screw hole 1
6, 17, 18: Through hole 19: Spanner hook 20: Greasing tube 2
1: Dust pipe 22, 23, 24: Dust seal

Claims (2)

[Claims] 1. A continuous casting machine comprising: a set bolt inserted into a through hole of a frame and a water cooling jacket in the order of a frame and a water cooling jacket; In the guide roll bearing structure, a greasing through hole is provided between the roll bearing mounting hole of the bearing box and the set bolt mounting screw hole, a through hole is provided at the center of the set bolt, and a greasing is provided at the spanner hook. A bearing structure for a guide roll of a continuous casting machine, comprising a pipe connection port. 2. The bearing structure for a guide roll of a continuous casting machine according to claim 1, wherein a through hole is provided between a roll bearing mounting hole of a bearing box and a mounting screw hole of another set bolt. A bearing structure for a guide roll of a continuous casting machine, characterized in that a through hole is provided in a center portion of a set bolt and a drainage pipe connection port is provided in a spanner hook portion.