Slab continuous casting driving roller assembly with cooling function

Abstract

The slab continuous casting transmission roller assembly with the cooling function comprises a first bearing seat, a second bearing seat, a transmission shaft, a chain wheel and a transmission roller, the two ends of the transmission shaft penetrate through and are inserted into the first bearing seat and the second bearing seat correspondingly, the side, extending out of the first bearing seat, of the transmission shaft is sleeved with the chain wheel, and the transmission roller is of a hollow columnar structure; the transmission roller is arranged between the first bearing seat and the second bearing seat, the transmission shaft is sleeved with the transmission roller, and the two axial sides of the transmission roller are each provided with a plurality of drainage holes; a water injection hole for injecting cooling water into the roller body of the transmission roller is formed in one end, far away from the chain wheel, of the transmission shaft, and the axis of the water injection hole and the axis of the transmission shaft are collinear; multiple cooling holes are formed in the end, provided with the water injection hole, of the transmission shaft, the axis of each cooling hole is perpendicular to the axis of the transmission shaft, one end of each cooling hole communicates with the water injection hole, and the other end of each cooling hole communicates with the interior of the transmission roller body. The device can ensure that cooling water completely enters the roller body of the driving roller, and the cooling effect is improved.

Description

Technical Field

[0001] This invention relates to the field of slab continuous casting technology, and in particular to a slab continuous casting drive roller assembly with cooling function. Background Technology

[0002] In the field of continuous metal casting, slab casting machines are widely used due to their flexible product specifications. However, during slab casting, the large width-to-thickness ratio of the slab results in a significantly smaller heat dissipation area per unit volume compared to square or round cross-section slabs. This causes the core of the slab to retain a large amount of sensible heat after leaving the secondary cooling zone, resulting in a persistently high surface temperature. When such high-temperature slabs are placed on the conveyor rollers, they essentially constitute a strong radiative heat source moving along the production line.

[0003] Under these operating conditions, the drive rollers, bearings, and auxiliary structures not only endure continuous static high-temperature radiation, but their roller surfaces also experience severe transient thermal shocks due to periodic contact with the red-hot slab. This thermal shock creates a huge temperature gradient across the roller cross-section, inducing extremely high cyclic thermal stress. Over long-term operation, this thermal stress can lead to problems such as surface cracking, plastic deformation, bearing seal failure, lubricant sintering, and deterioration of mechanical precision. Therefore, existing technologies typically employ water cooling to cool the drive roller conveyor.

[0004] like Figure 1 and Figure 2 As shown, the current cooling method for the drive roller body is to use external water pipes that enter the roller body through water holes on both sides. However, in actual operation, the following problems are observed: Firstly, the utilization rate of cooling water is not high, as some cooling water cannot enter the roller body due to the baffle between the water holes on both sides during the rotation of the roller body; secondly, the external water pipes are prone to deviating from the horizontal setting angle, which causes cooling water to fail to enter the roller body for cooling in some cases, resulting in poor cooling effect of the current cooling method for the drive roller body. Summary of the Invention

[0005] Therefore, it is necessary to provide a slab continuous casting drive roller assembly with cooling function to address the above-mentioned technical problems, which can ensure that cooling water completely enters the drive roller body and improve the cooling effect.

[0006] This invention provides a slab continuous casting drive roller assembly with cooling function, comprising: First bearing housing and second bearing housing; A drive shaft, one end of which is inserted through and inserted into a first bearing housing, and the other end of which is inserted through and inserted into a second bearing housing; A sprocket is fitted onto the side of the drive shaft that extends out of the first bearing housing, and is used to drive the drive shaft to rotate. The drive roller is a hollow columnar structure. It is located between the first bearing seat and the second bearing seat and is sleeved on the drive shaft. Multiple drainage holes are provided on both sides of the drive roller to drain the cooling water inside the roller body. The multiple drainage holes are evenly distributed around the axis of the drive roller. The end of the drive shaft away from the sprocket is provided with a water injection hole for injecting cooling water into the inside of the drive roller body. The axis of the water injection hole is collinear with the axis of the drive shaft, and the length of the water injection hole is less than half the length of the drive shaft. The drive shaft has multiple cooling holes at one end where the water injection hole is located. The axis of each cooling hole is perpendicular to the axis of the drive shaft. One end of each cooling hole is connected to the water injection hole, and the other end is connected to the inside of the drive roller body.

[0007] In one embodiment, the sprocket is provided with a mounting hole and a pressure plate, the pressure plate is fixedly connected to the side of the mounting hole away from the first bearing seat, and the drive shaft is keyed to the mounting hole.

[0008] In one embodiment, the diameter of the water injection hole is less than half the minimum shaft diameter of the drive shaft.

[0009] In one embodiment, the first bearing housing and the second bearing housing are sleeved on the drive shaft.

[0010] In one embodiment, the number of drainage holes is 12 to 20.

[0011] The beneficial effects of the present invention are as follows: The slab continuous casting transmission roller assembly with cooling function of the present invention uses water injection holes and cooling holes to inject water into the inside of the transmission roller body. The entire water injection process is unobstructed, the utilization rate of cooling water is high, and it can ensure that the cooling water completely enters the transmission roller body, thereby improving the cooling effect. Attached Figure Description

[0012] Figure 1 A schematic diagram of the existing cooling method for the drive roller body; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along plane AA; Figure 3 This is a partial cross-sectional structural diagram of a slab continuous casting drive roller assembly with cooling function provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the axial sidewall structure of the transmission roller provided in an embodiment of the present invention.

[0013] Explanation of reference numerals in the attached drawings: 100, first bearing housing; 200, second bearing housing; 300, drive shaft; 310, water injection hole; 320, cooling hole; 400, sprocket; 410, pressure plate; 500, drive roller; 510, drain hole. Detailed Implementation

[0014] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0015] It should be noted that in the description of this invention, "upper," "lower," "top," "bottom," and orientation or positional relationship are based on the appendix. Figure 3 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0016] In one embodiment, such as Figure 3 As shown, the slab continuous casting drive roller 500 assembly with cooling function in this embodiment includes: First bearing housing 100 and second bearing housing 200.

[0017] A drive shaft 300 is inserted through and inserted into a first bearing housing 100 at one end and through and inserted into a second bearing housing 200 at the other end. Bearings in the first bearing housing 100 and the second bearing housing 200 are sleeved on the drive shaft 300.

[0018] It should be noted that the specific connection relationship between the bearing housing and the drive shaft 300 is well known to those skilled in the art and will not be described in detail here.

[0019] The sprocket 400 is sleeved on one side of the drive shaft 300 that extends out of the first bearing housing 100, and is used to drive the drive shaft 300 to rotate.

[0020] The drive roller 500 is a hollow cylindrical structure, positioned between the first bearing housing 100 and the second bearing housing 200, and sleeved onto the drive shaft 300. Figure 4 As shown, multiple drainage holes 510 are provided on both axial sides of the drive roller 500 to drain the cooling water inside the roller body. The multiple drainage holes 510 are evenly distributed around the axis of the drive roller 500. The drive roller 500 is fixedly sleeved on the drive shaft 300.

[0021] Specifically, in this embodiment, the number of drainage holes 510 is 12 to 20.

[0022] During the process of the drive shaft 300 driving the drive roller 500 to rotate, the cooling water inside the drive roller 500 that has absorbed heat and heated up is discharged from the drain hole 510 to make room for the cooling water that will be injected later.

[0023] The end of the drive shaft 300 away from the sprocket 400 is provided with a water injection hole 310 for injecting cooling water into the inside of the drive roller 500. The axis of the water injection hole 310 is collinear with the axis of the drive shaft 300, and the length of the water injection hole 310 is less than half the length of the drive shaft 300.

[0024] In addition, the diameter of the water injection hole 310 is less than half the minimum shaft diameter of the drive shaft 300, so as to avoid affecting the structural stability of the drive shaft 300 due to the water injection hole 310 being too large.

[0025] The drive shaft 300 has multiple cooling holes 320 at one end where the water injection hole 310 is provided. The axis of each cooling hole 320 is perpendicular to the axis of the drive shaft 300. One end of each cooling hole 320 is connected to the water injection hole 310, and the other end is connected to the inside of the drive roller 500.

[0026] In this embodiment, the inlet of the water injection hole 310 is connected to the external water pipe connector, the inlet end of the external water pipe connector is connected to the water pipe, and the outlet end is a rotating component that is connected to the inlet of the water injection hole 310 through a hollow connecting rod.

[0027] In one embodiment, the sprocket 400 is provided with a mounting hole and a pressure plate 410. The pressure plate 410 is fixedly connected to the side of the mounting hole away from the first bearing seat 100, and the drive shaft 300 is keyed to the mounting hole.

[0028] The process of using the slab continuous casting transmission roller 500 assembly with cooling function of the present invention is as follows: start the motor connected to the sprocket 400, the sprocket 400 rotates and drives the transmission shaft 300 to rotate, the transmission shaft 300 drives the transmission roller 500 to rotate; at the same time, water is supplied to the water injection hole 310 through the external water pipe connector, and the cooling water flows into the inside of the rotating roller body from the cooling hole 320 to cool the roller body. As the rotating roller continues to rotate, the heated cooling water is discharged from the drain hole 510.

[0029] By using the slab continuous casting drive roller 500 assembly with cooling function of the present invention, it is possible to ensure that cooling water flows completely into the inside of the drive roller 500 body, thereby improving the utilization efficiency of cooling water and ensuring the cooling effect.

[0030] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A slab continuous casting drive roller assembly with cooling function, characterized in that, include: First bearing housing (100) and second bearing housing (200); A drive shaft (300), one end of which is inserted through and inserted into the first bearing housing (100), and the other end of which is inserted through and inserted into the second bearing housing (200); A sprocket (400) is sleeved on one side of the drive shaft (300) extending out of the first bearing seat (100) and is used to drive the drive shaft (300) to rotate. A drive roller (500) is a hollow columnar structure. The drive roller (500) is disposed between the first bearing seat (100) and the second bearing seat (200). The drive roller (500) is sleeved on the drive shaft (300). Multiple drainage holes (510) for draining cooling water inside the roller body are provided on both axial sides of the drive roller (500). The multiple drainage holes (510) are evenly distributed around the axis of the drive roller (500). The drive shaft (300) is provided with a water injection hole (310) at the end away from the sprocket (400) for injecting cooling water into the roller body of the drive roller (500). The axis of the water injection hole (310) is collinear with the axis of the drive shaft (300), and the length of the water injection hole (310) is less than half the length of the drive shaft (300). The drive shaft (300) has a water injection hole (310) at one end and a plurality of cooling holes (320) at the other end. The axis of each cooling hole (320) is perpendicular to the axis of the drive shaft (300). One end of each cooling hole (320) is connected to the water injection hole (310), and the other end is connected to the interior of the drive roller (500).

2. The slab continuous casting drive roller assembly with cooling function according to claim 1, characterized in that, The sprocket (400) is provided with a mounting hole and a pressure plate (410). The pressure plate (410) is fixedly connected to the side of the mounting hole away from the first bearing seat (100). The drive shaft (300) is keyed to the mounting hole.

3. The slab continuous casting drive roller assembly with cooling function according to claim 2, characterized in that, The diameter of the water injection hole (310) is less than half the minimum shaft diameter of the drive shaft (300).

4. The slab continuous casting drive roller assembly with cooling function according to claim 3, characterized in that, The bearings of the first bearing housing (100) and the second bearing housing (200) are sleeved on the drive shaft (300).

5. The slab continuous casting drive roller assembly with cooling function according to claim 4, characterized in that, The number of drainage holes (510) is 12 to 20.

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