Rolling mill roller bed structure capable of preventing blockage in alternate cooling and heating environment

Abstract

The utility model belongs to the technical field of hot rolling roller ways, and particularly discloses a rolling mill roller way structure capable of preventing blocking in a cold and hot alternating environment, which comprises a roller way body, a first bearing seat and a second bearing seat, a motor is arranged on the first bearing seat, a first rotating shaft and a second rotating shaft are arranged in the first bearing seat and the second bearing seat, and the first rotating shaft is connected with one end of the roller way body. Two first supporting sleeves and a transmission sleeve are arranged on the second rotating shaft, the transmission sleeve is located between the two first supporting sleeves, and the two first supporting sleeves and the transmission sleeve are fixedly connected with the inner wall of the other end of the roller way body. The problems that in the steel rolling process, a roller way is prone to deformation in the cold and heat alternating environment, so that a bearing is axially stuck, and the roller way cannot rotate normally are solved. Through the reasonable structural design, the influence of axial extension and retraction of the roller way on the bearing is effectively relieved, the blocking phenomenon is reduced, the continuity of steel rolling production is guaranteed, and the steel rolling productivity is improved.

Description

Technical Field

[0001] This utility model relates to the field of hot rolling mill roller technology, specifically to a rolling mill roller structure that prevents blockage under alternating hot and cold environments. Background Technology

[0002] In the steel rolling industry, hot runners, as key equipment for efficient production, play a vital role in the continuous rolling of steel. In production practice, when the mill is interrupted, the roller conveyor stops operating, and its temperature changes with the ambient temperature. When production restarts, the roller conveyor quickly resumes operation, at which point the internal heat increases dramatically. This frequent temperature fluctuation causes the roller conveyor to be in a state of alternating hot and cold.

[0003] However, in the cold winter, the outdoor temperature may drop to tens of degrees below zero Celsius, while the surface temperature of the roller conveyor can reach a relatively high level when the hot-rolling unit is running. The huge temperature difference further causes the roller conveyor to deform due to alternating hot and cold temperatures. Under the action of alternating hot and cold temperatures, the roller conveyor will elongate or shorten along the axial direction. Since the installation space of the bearing housing is relatively fixed, the axial expansion and contraction of the roller conveyor will cause the bearing housing to be subjected to additional axial force. When this axial force exceeds the bearing's bearing capacity, it will cause the bearing to jam axially. Once the bearing jams, the roller conveyor cannot rotate normally, resulting in jamming and stalling failures, which directly affect the continuity of steel rolling production and reduce steel rolling capacity. Utility Model Content

[0004] The purpose of this utility model is to provide a mill roller structure that prevents jamming under alternating hot and cold environments, so as to solve the problem that the roller is prone to deformation under alternating hot and cold environments during the steel rolling process, which leads to axial jamming of the bearing and the inability of the roller to rotate normally.

[0005] To achieve the above objectives, the basic solution provided by this utility model is as follows: a rolling mill roller structure to prevent blockage under alternating hot and cold environments, comprising a roller body, a bearing housing 1 and a bearing housing 2, wherein a motor is provided on the bearing housing 1, and a rotating shaft 1 and a rotating shaft 2 are provided inside the bearing housing 1 and the bearing housing 2, respectively. The rotating shaft 1 is connected to one end of the roller body, and the rotating shaft 2 is provided with two support sleeves 1 and a transmission sleeve, wherein the transmission sleeve is located between the two support sleeves 1, and both support sleeves 1 and transmission sleeve are fixedly connected to the inner wall of the other end of the roller body.

[0006] The working principle of this utility model is as follows: a rolling mill roller structure to prevent blockage in alternating hot and cold environments. In steel rolling production, when the motor starts, it drives the rotating shaft one to rotate synchronously. The rotating shaft one drives the supporting sleeve two to rotate, and the supporting sleeve two drives the roller body to start rotating. The roller body drives the rotating shaft two, and during the rotation of the roller body, the steel is rolled to complete the rolling process. Throughout the rotation process, the rotating shaft two maintains a fixed axial position under the fixing action of the bearing seat two. The rotating shaft two can undergo relative axial displacement with the roller body, thereby fundamentally eliminating the axial elongation and shortening of the roller body itself and ensuring smooth rotation.

[0007] The beneficial effects of this invention are as follows: By employing a support sleeve and a transmission sleeve, when the roller conveyor body is subjected to rapid alternating deformation due to hot and cold environments, under the axial contraction or expansion of the roller conveyor body, the second rotating shaft, fixed in the axial direction by the bearing seat second, maintains a fixed axial position. The rotating shaft, transmission sleeve, and support sleeve can undergo relative axial displacement with the roller conveyor body, thus fundamentally eliminating the problem of axial jamming of the bearings in the bearing seats on both sides of the roller conveyor caused by the axial elongation or shortening of the roller conveyor body itself, leading to roller conveyor jamming and stalling. Simultaneously, under the action of the motor driving the roller conveyor body to rotate, the roller conveyor body achieves smooth rotation through the transmission sleeve and rotating shaft.

[0008] Option 2, which is a preferred option of the basic option, has a spline at one end of the rotating shaft 2, and an inner spline hole for engaging the spline is opened on the inner wall of the transmission sleeve; the cooperation between the spline and the inner spline hole enables the rotating shaft 2 to drive the transmission sleeve to rotate more stably, ensuring the reliability of power transmission.

[0009] Option 3, which is a preferred option of Option 2, is that the spline and the inner spline hole are assembled with a clearance fit; the clearance fit allows the roller conveyor to have a certain amount of axial expansion and contraction space, avoiding excessive pressure on the bearing caused by the axial force generated by thermal expansion and contraction.

[0010] Option 4, which is a preferred option of Option 2, involves a transition fit between the two support sleeves and the spline. The transition fit ensures a certain connection strength between the support sleeves and the spline, while also accommodating the axial expansion and contraction of the roller conveyor to a certain extent.

[0011] Option 5, which is a preferred option of the basic option, is that the rotating shaft is provided with two support sleeves, which are fixedly connected to the inner wall of the roller conveyor body; the support sleeves can enhance the stability of the connection between the rotating shaft and the roller conveyor body, and further improve the smoothness of the roller conveyor operation.

[0012] Option 6, which is a preferred option of the basic option, has water cooling holes on each of the first support sleeve, the transmission sleeve and the second support sleeve; the water cooling holes facilitate water cooling, effectively reduce the temperature of the roller conveyor and reduce thermal deformation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a mill roller conveyor structure for preventing blockage under alternating hot and cold environments according to this utility model.

[0014] Figure 2 for Figure 1 Enlarged view at point D;

[0015] Figure 3 for Figure 1 Sectional view at point AA;

[0016] Figure 4 for Figure 1 Sectional view at point BB;

[0017] Figure 5 for Figure 1 Sectional view at point CC. Detailed Implementation

[0018] The present invention will be further described in detail below through specific embodiments:

[0019] The reference numerals in the accompanying drawings of the instruction manual include: 1. Roller body, 2. Bearing housing one, 3. Bearing housing two, 4. Motor, 5. Shaft one, 6. Shaft two, 7. Support sleeve one, 8. Transmission sleeve, 9. Spline, 10. Inner spline hole, 11. Support sleeve two, 12. Water cooling hole.

[0020] like Figures 1 to 5 The following describes a mill roller structure designed to prevent jamming under alternating hot and cold environments: The structure includes a roller body 1, a bearing housing 1 2, and a bearing housing 2 3. A motor 4 is welded to the bearing housing 1 2. A rotating shaft 1 5 and a rotating shaft 2 6 are welded into both bearing housing 1 2 and bearing housing 2 3. The rotating shaft 1 5 is connected to one end of the roller body 1. The rotating shaft 2 6 has two support sleeves 1 7 and a transmission sleeve 8. One end of the rotating shaft 2 6 has a spline 9. The inner wall of the transmission sleeve 8 has an internal spline hole 10 for engaging the spline 9. The spline hole 10 and the inner spline hole 9 are assembled with clearance fit. The two support sleeves 7 and the spline 9 are assembled with transition fit. The transmission sleeve 8 is located between the two support sleeves 7. The two support sleeves 7 and the transmission sleeve 8 are welded to the inner wall of the other end of the roller body 1. The rotating shaft 5 is welded with two support sleeves 11. The support sleeves 11 are welded to the inner wall of the roller body 1. Each support sleeve 7, transmission sleeve 8 and support sleeve 11 has a water cooling hole 12. The welding method is argon arc welding.

[0021] The implementation method of this embodiment is as follows: In steel rolling production, when motor 4 starts, motor 4 drives rotating shaft 5 to rotate synchronously, rotating shaft 5 drives supporting sleeve 11 to rotate, and supporting sleeve 11 drives roller body 1 to start rotating. When roller body 1 rotates, it drives rotating shaft 6 to rotate through transmission sleeve 8 and supporting sleeve 7 fixedly connected to the inner wall of its other end. During the rotation process, roller body 1 cooperates with other parts of the rolling mill to roll the steel and complete the rolling process.

[0022] Throughout the rotation process, the second shaft 6 remains fixed in the axial direction under the fixing action of the second bearing seat 3. The second shaft 6 can undergo relative axial displacement with the transmission sleeve 8 and the first support sleeve 7 to buffer the rotation, thereby fundamentally eliminating the excessive axial force generated by the axial expansion and contraction of the roller body 1 on the bearing and ensuring the smoothness of rotation.

[0023] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A mill roll table structure for preventing blockage under alternating hot and cold environments, characterized in that, The roller conveyor body (1), bearing seat 1 (2) and bearing seat 2 (3) are provided. The bearing seat 1 (2) is equipped with a motor (4). The bearing seat 1 (2) and bearing seat 2 (3) are each equipped with a rotating shaft 1 (5) and a rotating shaft 2 (6). The rotating shaft 1 (5) is connected to one end of the roller conveyor body (1). The rotating shaft 2 (6) is equipped with two support sleeves 1 (7) and a transmission sleeve (8). The transmission sleeve (8) is located between the two support sleeves 1 (7). The two support sleeves 1 (7) and the transmission sleeve (8) are fixedly connected to the inner wall of the other end of the roller conveyor body (1).

2. The mill roll table structure for preventing blockage under alternating hot and cold environments according to claim 1, characterized in that, One end of the rotating shaft (6) is provided with a spline (9), and the inner wall of the transmission sleeve (8) is provided with an inner spline hole (10) for engaging the spline (9).

3. The mill roll table structure for preventing blockage under alternating hot and cold environments according to claim 2, characterized in that, The spline (9) and the inner spline hole (10) are assembled in a clearance fit.

4. The mill roll table structure for preventing blockage under alternating hot and cold environments according to claim 2, characterized in that, The two support sleeves (7) and spline (9) are assembled in a transition fit.

5. The mill roll table structure for preventing blockage under alternating hot and cold environments according to claim 1, characterized in that, The rotating shaft (5) is provided with two support sleeves (11), which are fixedly connected to the inner wall of the roller body (1).

6. The mill roll table structure for preventing blockage under alternating hot and cold environments according to claim 1, characterized in that, Each of the support sleeve one (7), transmission sleeve (8) and support sleeve two (11) has a water cooling hole (12).

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