Waterproof device for lower supporting roll of rolling mill

Abstract

The utility model discloses a waterproof device for a lower supporting roll of a rolling mill, which belongs to the technical field of roll use and comprises a bearing seat and a bearing box positioned on the outer side of the bearing seat, a first mounting ring is detachably sleeved at the position of the bearing box far away from the bearing seat, and a second mounting ring is detachably sleeved at the position of the bearing seat close to the bearing box. The second installation ring is connected with the first installation ring through a waterproof cover arranged outside the bearing box in a sleeving mode. According to the utility model, through the arrangement of the first mounting ring and the second mounting ring, the waterproof cover can be fixedly sleeved on the bearing box, and when a roller is cooled, cooling water and oxide scales can be sprayed on the waterproof cover, so that the cooling water and the oxide scales cannot be in direct contact with the bearing box; cooling water and oxide scale are prevented from entering the oil film bearing to cause sealing failure.

Description

Technical Field

[0001] This utility model belongs to the technical field of rolling mill rolls, specifically relating to a waterproof device for the lower support roll of a rolling mill. Background Technology

[0002] The lower support roll is a crucial component of a rolling mill. Its primary function is to support the work rolls or intermediate rolls, preventing them from flexing or deforming during rolling, which would negatively impact the yield and quality of sheet or strip. Support rolls are characterized by good uniformity of surface hardness, a deep hardened layer, and excellent strength and toughness in the roll neck and core. Furthermore, support rolls should possess high wear resistance, good anti-stripping properties, and resistance to accidents.

[0003] Due to the crucial role of support rolls in rolling mills, their working conditions and performance requirements are relatively high. During the rolling process, support rolls need to ensure that the work rolls have high rigidity and minimal deformation; therefore, the support rolls themselves must possess good rigidity. Simultaneously, during use, the support rolls are constantly in rolling contact with the work rolls or intermediate rolls, requiring them to have excellent wear resistance and fatigue resistance.

[0004] During steel rolling, the rolls need to be cooled, and the cooling water has a significant impact on the lower support rolls of the mill. The oil film bearing seals at both ends of the lower support rolls have high performance requirements, especially the water seals. As a weak point in the sealing system, the water seals may fail due to the influence of cooling water. Once they fail, cooling water and iron oxide scale will directly enter the oil film bearings, causing damage. Water ingress into the bearings will cause oil emulsification. Water combines with oxidation products and sludge generated during oil use to form gel-like oil clumps, posing a risk of clogging the filters. Water ingress will reduce the oil film strength. Water emulsification leads to a decrease in the viscosity of the lubricating grease base oil, a reduction in oil film thickness, and a decrease in load-bearing capacity, resulting in problems such as fatigue cracks, pitting, and spalling in the bearings. At the same time, due to the decreased lubrication performance, mechanical friction increases, which may cause accidents such as support roll jamming and mill burnout. Utility Model Content

[0005] To address the problems of support roll jamming and mill burnout caused by damage to existing oil film bearings, this invention provides a waterproof device for the lower support roll of a rolling mill. Through the inclusion of a first mounting ring, a second mounting ring, and a waterproof cover, it prevents cooling water and iron oxide scale from entering the oil film bearing and causing seal failure during roll cooling.

[0006] The technical solution adopted by this utility model for a waterproof device for the lower support roll of a rolling mill is as follows:

[0007] A waterproof device for a rolling mill lower support roll includes a bearing housing and a bearing box located outside the bearing housing. The device is characterized in that: a first mounting ring is detachably fitted on the bearing box away from the bearing housing, and a second mounting ring is detachably fitted on the bearing housing near the bearing box. The second mounting ring is connected to the first mounting ring through a waterproof cover fitted outside the bearing box.

[0008] A further improvement of this utility model is that multiple support rods are evenly arranged circumferentially between the first mounting ring and the second mounting ring, with the axis of the lower support roller as the center.

[0009] A further improvement of the above-mentioned technical solution of this utility model is that each support rod is located inside the waterproof cover and supports the waterproof cover.

[0010] A further improvement of this utility model is that: both the first mounting ring and the second mounting ring are provided with connection ports, and both ends of the first mounting ring and the second mounting ring are provided with spring buckles that connect the two ends of the corresponding mounting rings together.

[0011] A further improvement of this utility model is that the inner walls of both the first mounting ring and the second mounting ring are provided with waterproof elastic pads that contact the corresponding bearing housings or bearing seats.

[0012] A further improvement of the above-mentioned technical solution of this utility model is that the gap between the elastic pad and the bearing housing or bearing seat in contact with it, as well as the gap at the connection between the two ends of the first mounting ring and the second mounting ring, is filled with sealant.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by this utility model includes:

[0014] In this invention, the first and second mounting rings can be used to fix the waterproof cover onto the bearing housing. When the roll is cooled, cooling water and iron oxide scale will be sprayed onto the waterproof cover, so that the cooling water and iron oxide scale cannot directly contact the bearing housing, thus preventing the cooling water and iron oxide scale from entering the oil film bearing and causing seal failure.

[0015] In this invention, the support rod can be set to lift the waterproof cover upwards, preventing the waterproof cover from sticking to the bearing housing and causing the bearing housing's heat dissipation effect to deteriorate.

[0016] In this invention, the spring buckle allows the two ends of the first and second mounting rings to be connected together, thus facilitating the fixing of this invention onto the bearing housing.

[0017] In this invention, the waterproof elastic gasket and sealant prevent cooling water and iron oxide scale from entering the invention through the gap between the first and second mounting rings and the bearing housing, thus preventing them from contacting the bearing housing and causing the oil film bearing seal to fail. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a waterproof device for the lower support roll of a rolling mill according to this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the waterproof cover structure of a waterproof device for the lower support roll of a rolling mill according to this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the second mounting ring of a waterproof device for the lower support roll of a rolling mill according to this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the first mounting ring of a waterproof device for the lower support roll of a rolling mill according to this utility model.

[0022] In the attached diagram: 1. Bearing housing; 2. Bearing box; 3. First mounting ring; 4. Second mounting ring; 5. Waterproof cover; 6. Support rod; 7. Connecting port; 8. Spring buckle; 9. Elastic pad. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this utility model.

[0024] like Figure 1 and Figure 2 As shown, the present invention includes a bearing housing 1, a bearing box 2 detachably connected to the outer side of the bearing housing 1, a first mounting ring 3 disposed at a position away from the bearing housing 1, a second mounting ring 4 disposed at a position of the bearing housing 1 close to the bearing box 2, and a waterproof cover 5 disposed between the first mounting ring 3 and the second mounting ring 4 and fitted onto the bearing box 2. The waterproof cover 5 may be made of waterproof tarpaulin.

[0025] In this utility model, the waterproof cover 5 is specifically designed as follows: Figure 1 and Figure 2As shown, the waterproof cover 5 has multiple support rods 6 inside for supporting it. These support rods 6 are evenly arranged axially around the axis of the lower support roller. Each support rod 6 is located between the first mounting ring 3 and the second mounting ring 4. The support rods 6 can be installed in various ways, including connecting both ends of the support rod 6 to the first mounting ring 3 and the second mounting ring 4 respectively; connecting one end of the support rod 6 to the first mounting ring 3 and the other end to the bearing housing 2 near the bearing seat 1; connecting one end of the support rod 6 to the second mounting ring 4 and the other end to the bearing housing 2 away from the bearing seat 1. In this embodiment, for example... Figure 2 As shown, one end of the support rod 6 is connected to the first mounting ring 3, and the other end of the support rod 6 is connected to the bearing housing 2 near the bearing seat 1.

[0026] In this utility model, the first mounting ring 3 is specifically configured as follows: Figure 4 As shown, the first mounting ring 3 has a connection port 7, and the outer wall of the first mounting ring 3 is provided with matching spring buckles 8 on both sides of the connection port 7. At the same time, the inner wall of the first mounting ring 3 is also fixedly connected with a waterproof elastic pad 9.

[0027] In this utility model, the second mounting ring 4 is specifically configured as follows: Figure 3 As shown, the second mounting ring 4 has a connection port 7, and the outer wall of the second mounting ring 4 is provided with matching spring buckles 8 on both sides of the connection port 7. At the same time, the inner wall of the second mounting ring 4 is also fixedly connected with a waterproof elastic pad 9.

[0028] The working principle of the waterproof device for the lower support roll of the rolling mill in this embodiment is as follows:

[0029] In this embodiment, the first mounting ring 3 and the second mounting ring 4 are first placed on the corresponding positions of the bearing housing 2, and the two ends of the first mounting ring 3 and the second mounting ring 4 are connected together by the spring buckle 8, so that the first mounting ring 3 and the second mounting ring 4 are fixed on the bearing housing 2. Then, the support rod 6 is welded between the first mounting ring 3 and the second mounting ring 4. Then, the waterproof cover 5 is put on the support rod 6, and the two ends of the waterproof cover 5 are riveted to the corresponding first mounting ring 3 and the second mounting ring 4.

[0030] Then, apply waterproof sealant to the gap between the elastic pad 9 and the bearing housing 2 or bearing seat 1 that are in contact with it, as well as to the gap at the connection between the two ends of the first mounting ring 3 and the second mounting ring 4.

[0031] When the lower support roller needs to be disassembled and maintained, first remove the waterproof cover 5, then remove the first mounting ring 3, the second mounting ring 4 and the support rod 6, and the lower support roller can be disassembled and maintained normally.

[0032] When the support rod 6 is installed such that its two ends are connected to the first mounting ring 3 and the second mounting ring 4 respectively, the spring buckles 8 of the first mounting ring 3 and the second mounting ring 4 can be opened directly when the lower support roller is disassembled and maintained, so that the entire utility model can be removed for easy disassembly and maintenance of the lower support roller. After the lower support roller is maintained, the utility model can be reused.

[0033] In the above embodiments, the present invention provides a waterproof device for the lower support roll of a rolling mill. In the present invention, the waterproof cover can be fixedly sleeved on the bearing housing by the first mounting ring and the second mounting ring. When the roll is cooled, the cooling water and iron oxide scale will be sprayed on the waterproof cover, so that the cooling water and iron oxide scale cannot directly contact the bearing housing, thus preventing the cooling water and iron oxide scale from entering the oil film bearing and causing the seal to fail.

[0034] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A waterproof device for a rolling mill lower support roll, comprising a bearing housing (1) and a bearing box (2) located outside the bearing housing (1), characterized in that: A first mounting ring (3) is detachably fitted on the bearing housing (2) away from the bearing seat (1), and a second mounting ring (4) is detachably fitted on the bearing seat (1) near the bearing housing (2). The second mounting ring (4) is connected to the first mounting ring (3) through a waterproof cover (5) fitted on the outside of the bearing housing (2).

2. The waterproof device for the lower support roll of a rolling mill according to claim 1, characterized in that: Multiple support rods (6) are evenly arranged circumferentially between the first mounting ring (3) and the second mounting ring (4) with the axis of the lower support roller as the center.

3. A waterproof device for the lower support roll of a rolling mill according to claim 2, characterized in that: Each support rod (6) is located inside the waterproof cover (5) and supports the waterproof cover (5).

4. A waterproof device for the lower support roll of a rolling mill according to claim 1, characterized in that: Both the first mounting ring (3) and the second mounting ring (4) are provided with connection ports (7), and both ends of the first mounting ring (3) and the second mounting ring (4) are provided with spring buckles (8) that connect the two ends of the corresponding mounting rings together.

5. A waterproof device for the lower support roll of a rolling mill according to claim 1, characterized in that: The inner walls of the first mounting ring (3) and the second mounting ring (4) are provided with waterproof elastic pads (9) that come into contact with the corresponding bearing housing (2) or bearing seat (1).

6. A waterproof device for the lower support roll of a rolling mill according to claim 5, characterized in that: The gap between the elastic pad (9) and the bearing housing (2) or bearing seat (1) in contact with it, as well as the gap at the connection between the two ends of the first mounting ring (3) and the second mounting ring (4), are filled with sealant.

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