阅读说明：本技术 一种连铸辊长寿化冷却结构及方法 (Long-life cooling structure and method for continuous casting roller ) 是由 史宇峰 邵春诚 张海峰 李海云 赵海军 左溪强 代会民 于 2021-02-25 设计创作，主要内容包括：一种连铸辊长寿化冷却结构及方法,包括辊轴、辊套,辊轴通过若干个轴承座支撑,相邻两个轴承座之间的辊轴上套装有一个辊套,辊轴的两端安装有端盖,辊轴内设有轴芯孔；轴套内设有若干个辊套长孔,辊套长孔沿轴套轴向设置,辊套两端设有辊套内壁沟槽,辊套内壁沟槽沿辊套内壁周向设置并将辊套长孔与辊轴之间导通,在辊轴上与辊套内壁沟槽所对位置处设有若干个轴径向孔,轴径向孔与轴芯孔连通,辊套与辊轴之间为过盈配合；在辊套中部位置处的轴芯孔中固定有封闭堵,封闭堵与轴芯孔内壁之间设有密封圈。本发明在原有连铸辊框架、结构不改变的情况下,改造出新的连铸辊水路结构,以保证工作状态下对连铸辊的降温。(A long-life cooling structure and method for a continuous casting roller comprise a roller shaft and a roller sleeve, wherein the roller shaft is supported by a plurality of bearing seats, the roller sleeve is sleeved on the roller shaft between two adjacent bearing seats, end covers are arranged at two ends of the roller shaft, and a shaft core hole is formed in the roller shaft; the roller sleeve is internally provided with a plurality of roller sleeve long holes which are arranged along the axial direction of the roller sleeve, roller sleeve inner wall grooves are arranged at two ends of the roller sleeve, the roller sleeve inner wall grooves are arranged along the circumferential direction of the roller sleeve inner wall and conduct the roller sleeve long holes and the roller shaft, a plurality of axial and radial holes are arranged on the roller shaft at the positions opposite to the roller sleeve inner wall grooves, the axial and radial holes are communicated with the shaft core hole, and the roller sleeve and the roller shaft are in interference fit; a sealing plug is fixed in the shaft core hole at the middle position of the roller sleeve, and a sealing ring is arranged between the sealing plug and the inner wall of the shaft core hole. According to the invention, under the condition that the original continuous casting roller frame and structure are not changed, a new continuous casting roller waterway structure is improved, so that the continuous casting roller is cooled under the working state.)

1. A long-life cooling structure of a continuous casting roller comprises a roller shaft and a roller sleeve, wherein the roller shaft is supported by a plurality of bearing seats, the roller sleeve is sleeved on the roller shaft between two adjacent bearing seats, end covers are mounted on the bearing seats at two ends of the roller shaft, and a shaft core hole is formed in the roller shaft; the roll sleeve is characterized in that a plurality of roll sleeve long holes are formed in the roll sleeve, the roll sleeve long holes are axially arranged along the roll sleeve, roll sleeve inner wall grooves are formed in the positions, close to the two ends of the roll sleeve, the roll sleeve inner wall grooves are circumferentially arranged along the inner wall of the roll sleeve and are communicated with the roll sleeve long holes, a plurality of axial and radial holes are formed in the positions, opposite to the roll sleeve inner wall grooves, of the roll shaft, the axial and radial holes are communicated with a shaft core hole and the roll sleeve inner wall grooves, and the roll sleeve is in interference fit with the roll shaft;

and a sealing plug is fixed in the shaft core hole at the middle position of the roller sleeve, and a sealing ring is arranged between the sealing plug and the inner wall of the shaft core hole.

2. The long-life cooling structure for the continuous casting roll according to claim 1, wherein the closing plug is fixedly connected with the roll shaft through a positioning steel bar.

3. The long-life cooling structure of the continuous casting roll according to claim 1, wherein a rotary joint is installed between the end cover and the roll shaft, a water inlet and outlet channel is arranged on the end cover, one end of the water inlet and outlet channel is communicated with the hole of the roll core through the rotary joint, and the other end of the water inlet and outlet channel is communicated with the water inlet and outlet channel in the connected bearing seat.

4. The long-life cooling structure of the continuous casting roll according to claim 1, wherein a plurality of the roll shell long holes are uniformly distributed in the circumferential direction of the roll shell.

5. A cooling method of a long-life cooling structure of a continuous casting roll according to any one of claims 1 to 4, comprising:

1) cooling water enters the end rotary joint from a water inlet channel of the end bearing block and the end cover and then enters the shaft core hole, and because the shaft core hole is internally provided with a sealing plug, the cooling water enters the roller sleeve inner wall groove of the end roller sleeve from a shaft radial hole close to the shaft head and enters the roller sleeve long hole of the end roller sleeve;

2) cooling water in the long hole of the roller sleeve at the end head roller sleeve enters the axial radial hole and the axial core hole from the groove on the inner wall of the roller sleeve at the other end of the end head roller sleeve;

3) the cooling water returning to the shaft core hole flows downwards to a section, enters the roller sleeve long hole of the intermediate roller sleeve through the axial radial hole and the roller sleeve inner wall groove of the intermediate roller sleeve, and then returns to the shaft core hole through the roller sleeve inner wall groove at the other end of the intermediate roller sleeve and the axial radial hole again;

4) and cooling water circulates in the whole continuous casting roll according to the circulation mode, and finally the cooling water is discharged from the water outlet channels of the end tail end cover and the end tail bearing seat.

Technical Field

The invention belongs to the field of continuous casting roller equipment, and particularly relates to a long-life cooling structure and method for a continuous casting roller.

Background

The continuous casting roller is in a high-temperature state under the influence of external heat in the working process, and if the roller is not cooled, the surface of the roller is annealed, so that the wear resistance of the roller is reduced, and the service life of the roller is shortened. To avoid this phenomenon, water is generally introduced into the core and sprayed from the outside. The distance between the core part and the surface of the roller is relatively long, the cooling capacity is limited, and the temperature of the roller is ensured mainly by external spraying. In the event of failure of the external spray system, the roll life is drastically reduced. We ensure the temperature of the roll using the following scheme.

Patent document No. CN206083798U discloses "a continuous casting roll with internal water circulation structure", the internal water circulation structure of the continuous casting roll is that 3 groups of circulation structures are processed on a roll sleeve, each group of circulation structures has 3 circulation pipes arranged in parallel, the 3 circulation pipes are sequentially communicated end to end, cooling water in an inner hole of a mandrel needs to sequentially pass through the 3 circulation pipes to complete a cooling circulation path, so that one cooling water circulation path is too long, thereby reducing the circulation amount of the cooling water per unit time in the roll sleeve, and the cooling water is sequentially passed through water flow channels arranged in parallel in the roll sleeve, the cooling temperature on the surface of the roll sleeve is not uniform, so that the cooling effect of the roll sleeve is better.

Disclosure of Invention

The invention aims to provide a cooling structure and a cooling method for prolonging the service life of a continuous casting roller.

In order to achieve the purpose, the invention adopts the following technical scheme:

a long-life cooling structure of a continuous casting roller comprises a roller shaft and a roller sleeve, wherein the roller shaft is supported by a plurality of bearing seats, the roller sleeve is sleeved on the roller shaft between two adjacent bearing seats, end covers are mounted on the bearing seats at two ends of the roller shaft, and a shaft core hole is formed in the roller shaft; the roll sleeve is internally provided with a plurality of roll sleeve long holes which are axially arranged along the roll sleeve, roll sleeve inner wall grooves are arranged close to two ends of the roll sleeve, the roll sleeve inner wall grooves are circumferentially arranged along the inner wall of the roll sleeve and are communicated with the roll sleeve long holes, a plurality of axial-radial holes are arranged on the roll shaft at positions opposite to the roll sleeve inner wall grooves, the axial-radial holes are communicated with the shaft core hole and the roll sleeve inner wall grooves, and the roll sleeve is in interference fit with the roll shaft;

and a sealing plug is fixed in the shaft core hole at the middle position of the roller sleeve, and a sealing ring is arranged between the sealing plug and the inner wall of the shaft core hole.

The sealing plug is fixedly connected with the roll shaft through a positioning steel bar.

And a rotary joint is arranged between the end cover and the roll shaft, a water inlet and outlet channel is arranged on the end cover, one end of the water inlet and outlet channel is communicated with the shaft core hole through the rotary joint, and the other end of the water inlet and outlet channel is communicated with the water inlet and outlet channel in the connected bearing seat.

The plurality of long holes of the roller sleeve are uniformly distributed in the circumferential direction of the shaft sleeve.

A cooling method of a long-life cooling structure of a continuous casting roll comprises the following steps:

1) cooling water enters the water inlet channel of the end cover from the water inlet channel in the end bearing seat, then enters the end rotary joint and then enters the shaft core hole, and because the shaft core hole is internally provided with a sealing plug, the cooling water enters the groove on the inner wall of the roller sleeve of the end roller sleeve from the axial radial hole close to the shaft head and enters the roller sleeve long hole of the end roller sleeve;

2) cooling water in the long hole of the roller sleeve at the end head roller sleeve enters the axial radial hole and the axial core hole from the groove on the inner wall of the roller sleeve at the other end of the end head roller sleeve;

3) the cooling water returning to the shaft core hole flows downwards to a section, enters the roller sleeve long hole of the intermediate roller sleeve through the axial radial hole and the roller sleeve inner wall groove of the intermediate roller sleeve, and then returns to the shaft core hole through the roller sleeve inner wall groove at the other end of the intermediate roller sleeve and the axial radial hole again;

4) and cooling water circulates in the whole continuous casting roll according to the circulation mode, and finally the cooling water is discharged from the water outlet channels of the end tail end cover and the end tail bearing seat.

Compared with the prior art, the invention has the beneficial effects that:

the continuous casting roll sleeve is provided with a plurality of axial parallel water flow channels, namely roll sleeve long holes, wherein two ends of all the roll sleeve long holes are simultaneously communicated with the shaft core hole, and the shaft core hole is internally provided with a sealing plug, so that cooling water in the shaft core hole can completely enter all the roll sleeve long holes at the same time and then flows back to the shaft core hole from all the roll sleeve long holes. The cooling water circulation structure has the advantages of large cooling water flux, good roller cooling effect and uniform cooling temperature on the surface of the roller sleeve.

The cooling water for the continuous casting roll passes through the position close to the roll surface, so that the cooling of the roll sleeve is ensured. Thereby avoiding the abrasion caused by the annealing of the roller sleeve and prolonging the service life of the roller sleeve. Therefore, the consumption of the bearing and the rotary joint can be saved, the preparation work can be greatly reduced, and the consumption of various materials, spare parts and the like in the preparation process can be greatly saved. Most importantly: the method can better improve the roll gap out-of-tolerance phenomenon caused by the abrasion of the roll and reduce the influence of the roll gap out-of-tolerance on the quality of the steel billet.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a view from a-a of fig. 1.

Fig. 3 is a view from B-B of fig. 1.

In the figure: the roller bearing comprises a water inlet channel 1, a rotary joint 2 at the end, an end cover 3, a bearing seat 4 at the end, a shaft core hole 5, a groove on the inner wall of a roller sleeve 6, a radial hole 7, a roller sleeve 8 at the end, a long hole 9 of the roller sleeve, a positioning steel bar 10, a sealing plug 11, a middle bearing seat I12, a middle roller sleeve 13, a roller shaft 14, a middle bearing seat II 15, a tail roller sleeve 16, a tail bearing seat 17, a tail end cover 18 and a tail end rotary joint 19.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.

As shown in fig. 1-3, a cooling structure for prolonging the service life of a continuous casting roll comprises roll shafts 14 and roll sleeves, wherein the roll shafts 14 are supported by a plurality of bearing blocks, the roll shaft 14 between two adjacent bearing blocks is sleeved with a roll sleeve, end covers are mounted on the bearing blocks at two ends of the roll shaft 14, and a shaft core hole 5 is arranged in each roll shaft 14; a plurality of roller sleeve long holes 9 are formed in the roller sleeve, the roller sleeve long holes 9 are axially arranged along the roller sleeve, roller sleeve inner wall grooves 6 are formed in the positions, close to the two ends of the roller sleeve, the roller sleeve inner wall grooves 6 are circumferentially arranged along the inner wall of the roller sleeve and are communicated with the roller sleeve long holes 9, a plurality of axial and radial holes 7 are formed in the positions, opposite to the roller sleeve inner wall grooves 6, of the roller shaft 14, the axial and radial holes 7 are communicated with the shaft core hole 5 and the roller sleeve inner wall grooves 6, and the roller sleeve and the roller shaft 14 are in interference fit;

a sealing plug 11 is fixed in the shaft core hole 5 at the middle position of the roller sleeve, and an O-shaped sealing ring is arranged between the sealing plug 11 and the inner wall of the shaft core hole 5.

The closing plug 11 is fixedly connected with a roll shaft 14 through a positioning steel bar 10.

And a rotary joint (an end rotary joint 2 and an end tail rotary joint 19) is arranged between the end cover (an end cover 3 and an end tail end cover 18) and the roller shaft 14, a water inlet and outlet channel is arranged on the end cover, one end of the water inlet and outlet channel is communicated with the shaft core hole 5 through the rotary joint, and the other end of the water inlet and outlet channel is communicated with the water inlet and outlet channel in the bearing seat which is connected with the water inlet and outlet channel.

The plurality of long holes 9 of the roller sleeve are uniformly distributed in the circumferential direction of the roller sleeve.

The invention is composed of a roll shaft 14, an end bearing seat 4, an end roller sleeve 8, an intermediate bearing seat I12, an intermediate roller sleeve 13, an intermediate bearing seat II 15, an end tail roller sleeve 16, an end tail bearing seat 17, an end cover 3 and an end tail cover 18 which are arranged on the bearing seats at the two ends, and an end rotary joint 2 and an end tail rotary joint 19 which are arranged on the two end covers.

Equally drilling a plurality of roller sleeve long holes 9 on the wall of the original roller sleeve along the circumference along the axial direction, and then welding and sealing each hole opening. And turning a roller sleeve inner wall groove 6 at the end openings of the inner wall of the roller sleeve, which are close to the two end openings of the roller sleeve long hole 9, and communicating with the roller sleeve long hole 9.

The central axle hole 5 is drilled from the two ends of the roll axle 14 along the central axle line to the middle position near the axle, and a plurality of sets of axial radial holes 7 are drilled along the circumference and communicated with the central axle hole 5 at the position of aligning with the inner wall grooves 6 of the roll sleeves, so that the central axle hole 5 is communicated with the inner wall grooves 6 of the roll sleeves and the long holes 9 of the roll sleeves after being installed, and water in the central axle hole can flow into the long holes 9 of the roll sleeves.

In order to ensure the cooling water to flow through the long holes 9 of the roller sleeve during operation, through holes are drilled as positioning holes along the radial direction at the middle position of the shaft roller 14 to the roller sleeve, a sealing plug 11 with O-rings at two ends and the same hole diameter is arranged in the shaft core hole 5, and a positioning steel bar 10 penetrates through the positioning holes to fix the sealing plug 11. The roll shaft and the roll sleeve are fixed and sealed through interference fit.

A cooling method of a long-life cooling structure of a continuous casting roll comprises the following steps:

1) cooling water enters the end rotary joint 2 from the water inlet channel 1 of the end bearing block 4 and the end cover 3 and then enters the shaft core hole 5, and because the shaft core hole 5 is provided with the sealing plug 11, the cooling water enters the roller sleeve inner wall groove 6 of the end roller sleeve 8 from the axial radial hole 7 close to the shaft head and enters the roller sleeve long hole 9 of the end roller sleeve 8;

2) cooling water in a roller sleeve long hole 9 of the end roller sleeve 8 enters the axial radial hole 7 and the shaft core hole 5 from a roller sleeve inner wall groove 6 at the other end of the end roller sleeve 8;

3) the cooling water returning to the shaft core hole 5 flows downwards for a section, is introduced into the roller sleeve long hole 9 of the intermediate roller sleeve 13 through the axial radial hole 7 and the roller sleeve inner wall groove 6 of the intermediate roller sleeve 13, and then returns to the shaft core hole 5 through the roller sleeve inner wall groove 6 at the other end of the intermediate roller sleeve 13 and the axial radial hole 7;

4) the cooling water circulates in the whole continuous casting roll according to the circulation mode, and finally the cooling water is discharged from the water outlet channels of the end-to-end covers 18 and the end-to-end bearing seats 17.