Sealing mechanism based on oil film bearing

Abstract

The utility model relates to a sealing mechanism based on an oil film bearing, which belongs to the technical field of oil film bearings and comprises a sealing cover, a roller neck seal, a sealing hoop and a water seal, the sealing cover is arranged at the end of a bearing seat, the roller neck seal is mounted between a taper sleeve and a roller, the sealing hoop is mounted on the roller neck seal, and the water seal is mounted on the end face of the sealing cover. According to the sealing mechanism based on the oil film bearing, the circumferential direction face of the sealing cover makes contact with the circumferential direction face of the roller neck seal, the sealing area is increased, the sealing efficiency is improved, oil leakage is prevented, environmental pollution is eradicated, meanwhile, an original cavity formed between DF sealing oil limbs and water limbs and the sealing cover is removed, the source of water inflow is prevented, oil product emulsification is blocked, a large number of resources are saved, and the sealing mechanism is economical and practical. An aluminum ring is removed, cooling water is discharged more smoothly, the roll neck seal and the sealing cover are both made of composite materials, and the service life of the seal is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of oil film bearing technology, specifically to a sealing mechanism based on oil film bearings. Background Technology

[0002] Oil film bearings, also known as fluid friction bearings, are a type of sliding bearing. During operation, a layer of oil film completely separates the journal and bushing, preventing metal-to-metal contact and creating pure fluid friction. Oil film bearings can operate under pressures up to 25 MPa with a coefficient of friction of only 0.001-0.008. They possess advantages such as low coefficient of friction, high load capacity, high operating speed, good rigidity, and long service life. They are high-precision bearings widely used in the support rolls of modern cold and hot steel continuous rolling mills. Rolling mills using oil film bearings can produce high-precision rolled products.

[0003] During operation, oil film bearings are significantly affected by water ingress and oil leakage. Water ingress emulsifies the sealing surfaces, compromising their oil-water separation and oxidation resistance. This causes unnecessary damage to the lubrication system and triggers alarms on components. Furthermore, it disrupts oil film formation, reducing the bearing's load-bearing capacity, deteriorating lubrication performance, and causing carbon buildup and corrosion on the tapered sleeve surface. In severe cases, this can lead to bearing overheating and failure. Oil consumption is a crucial performance indicator for the normal operation of oil film bearings; accumulated leakage not only wastes significant resources but also pollutes the environment.

[0004] Currently, there are several types of oil film bearing seals: DF seals, ACS seals, and J-type seals. Early X-type seals have been phased out. DF seals have two variations: one is the SMS type, which thickens the skeleton of the water and oil arms; the other is the MORGOIL type, which changes the sealing cap and increases the rigidity of the water and oil arms. ACS is a seal developed by Tieling Rubber Research Institute. DF seals and their new structures are improvements on X seals. Although sealing performance is somewhat improved, oil leakage and water ingress are not completely resolved. J-type seals offer improved sealing compared to DF seals, but oil leakage and water ingress are still not completely resolved. Furthermore, their installation performance is poor, and their cost is high, so they are not widely used in steel mills. ACS seals, designed by Tieling Rubber Research Institute, show some inheritance and evolution from DF seals, with significant changes in the overall design concept. They add several water-sealing arms, greatly improving water sealing performance. However, due to weakened strength of the oil and water sealing arms, oil sealing performance is weakened, leading to lip reversal, which is difficult to detect and easily causes sealing arm tearing, resulting in large-scale water intrusion and oil leakage.

[0005] Therefore, how to solve the failure of oil film bearings and lubrication systems caused by water ingress and oil leakage is an urgent problem that the steel rolling industry needs to solve. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a sealing mechanism based on an oil film bearing. The sealing mechanism changes from line contact in the circumferential direction to surface contact in the circumferential direction, increasing the sealing area and improving sealing efficiency. The compact structure facilitates installation and maintenance. This invention not only improves the strength and smoothness of the sealing cover but also places higher demands on the roller neck sealing material. The material's high temperature resistance and wear resistance are significantly improved, while reducing the generation of abrasive particles after wear, thus extending the service life of the seal.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sealing mechanism based on an oil film bearing, comprising a sealing cover, a roller neck seal, a sealing clamp, and a water seal. The sealing cover is disposed at the end of the bearing housing, the roller neck seal is installed between the tapered sleeve and the roll, the sealing clamp is installed on the roller neck seal, and the water seal is installed on the end face of the sealing cover. The side of the water seal away from the sealing cover has a water sealing leg.

[0008] Furthermore, the circumferential surface of the sealing cap is in contact with the circumferential surface of the roller neck seal.

[0009] The beneficial effects of adopting the above-mentioned further solutions are: increased sealing area and improved sealing performance.

[0010] Furthermore, the working surface of the sealing cover is ceramic-coated to enhance wear resistance, and the sealing working surface of the roller neck seal is a special rubber that is both high-temperature resistant and wear-resistant.

[0011] The beneficial effects of adopting the above-mentioned further solutions are: weakening the friction pair, improving the strength and smoothness of the sealing structure, and reducing the generation of abrasive particles after wear.

[0012] Furthermore, the roller neck seal has a water-retaining limb on the side near the bushing.

[0013] The beneficial effects of adopting the above-mentioned further solution are: the setting of the water-blocking limb facilitates the quick matching of the roller neck seal and the sealing cover, making assembly convenient.

[0014] Furthermore, a sealing cavity is formed between the roller neck seal, the sealing cover, and the bearing housing.

[0015] The beneficial effects of adopting the above-mentioned further solutions are: preventing oil leaks and eliminating environmental pollution.

[0016] Furthermore, a water accumulation cavity is formed between the roller neck seal, the sealing cover, and the water seal, and a water outlet is provided on the end face of the sealing cover located at the lower part of the bearing seat.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the aluminum ring is removed, allowing the cooling water to drain more smoothly.

[0018] Compared with the prior art, this utility model provides a sealing mechanism based on an oil film bearing, which has the following advantages:

[0019] This sealing mechanism based on oil film bearings installs the sealing cover and roller neck seal in essentially the same way as traditional DF and ACS seals. However, it reduces the weight of the sealing cover, improves the surface finish of the sealing cover, and enhances the performance of the roller neck seal material, reducing abrasive particle generation after wear. The increased circumferential contact area between the sealing cover and the roller neck seal significantly improves sealing performance and service life, prevents lubricant leakage, eliminates environmental pollution, extends the service life of the tapered sleeve and bushing, and reduces component procurement costs. Furthermore, the aluminum ring of the traditional DF seal device is eliminated, allowing for smoother cooling water drainage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the upper cross-sectional structure of the sealing mechanism of the oil film bearing of this utility model;

[0021] Figure 2 This is a schematic diagram of the lower cross-sectional structure of the sealing mechanism of the oil film bearing of this utility model.

[0022] In the diagram: 1. Sealing cap; 1.1. Outlet; 2. Roll neck seal; 2.1. Water baffle; 2.2. Sealing working surface; 3. Sealing ring; 4. Water seal; 4.1. Water sealing arm; 5. Bearing housing; 6. Bushing; 7. Tapered sleeve; 8. Roll. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 2 The sealing mechanism based on the oil film bearing in this embodiment includes a sealing cover 1, a roller neck seal 2, a sealing clamp 3, and a water seal 4. The sealing cover 1 is disposed at the end of the bearing seat 5. The roller neck seal 2 is installed between the tapered sleeve 7 and the roll 8. The roller neck seal 2 has a water-blocking limb 2.1 on the side near the bushing 6. The water-blocking limb 2.1 is part of the roller neck seal 2. The sealing clamp 3 is installed on the roller neck seal 2. The water seal 4 is installed on the end face of the sealing cover 1. The water seal 4 has a water-sealing limb 4.1 on the side away from the sealing cover 1. The water-sealing limb 4.1 is part of the water seal 4.

[0025] The circumferential surface of the sealing cover 1 contacts the circumferential surface of the roller neck seal 2, increasing the sealing area and improving the sealing efficiency. A sealing cavity is formed between the roller neck seal 2, the sealing cover 1, and the bearing seat 5 to prevent oil leakage and eliminate environmental pollution.

[0026] A water accumulation cavity is formed between the roller neck seal 2, the sealing cover 1, and the water seal 4. A water outlet 1.1 is provided on the end face of the sealing cover 1 located at the lower part of the bearing housing 5, allowing for smoother drainage of cooling water. Because the cavity is more prone to oil leakage and water ingress due to the positive and negative pressure differences during roller movement and oscillation in the bearing housing 5, the original DF seal oil and water components, along with the sealing cover, are eliminated to form a cavity, preventing water ingress, blocking the root cause of oil emulsification, and saving a significant amount of resources.

[0027] The working surface of the sealing cap 1 is ceramic-coated to enhance wear resistance. The sealing working surface 2.2 of the roller neck seal 2 is made of a special rubber that is both high-temperature resistant and wear-resistant, and lubricating oil is applied between the roller neck seal 2 and the sealing cap 1. The lubricating oil is a special oil for oil film bearings. In other embodiments, the special oil for oil film bearings can also be replaced with grease to reduce friction pairs, improve the strength and smoothness of the sealing structure, and reduce the generation of abrasive particles after wear. The roller neck seal 2 is made of high-molecular composite material, which has excellent wear resistance, oil resistance, high temperature resistance, corrosion resistance, aging resistance, tear resistance, and other excellent chemical properties.

[0028] The working principle of the above embodiments is as follows:

[0029] In use, the installation of the sealing cover 1 and the roller neck seal 2 is basically the same as that of traditional DF seals and ACS seals. Lubricating oil is applied to the working surface of the sealing cover 1 to prevent dry friction between the sealing cover 1 and the roller neck seal 2 during seal rotation, thus reducing the friction pair. This improves the smoothness of the sealing cover 1 and the strength of the roller neck seal 2, reducing the generation of abrasive particles after wear. The circumferential surface of the sealing cover 1 contacts the circumferential surface of the roller neck seal 2, increasing the sealing area and improving sealing efficiency. This prevents oil leakage and cooling water intrusion, eliminating environmental pollution, while extending the service life of the cone sleeve 7 and bushing 6, and reducing component procurement costs. Furthermore, the aluminum ring of the traditional DF seal device is removed, allowing for smoother cooling water drainage.

[0030] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented. It should be noted that the orientation or positional relationship indicated herein is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is 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 a limitation of this application.

Claims

1. A sealing mechanism based on an oil film bearing, characterized in that: It includes a sealing cover (1), a roll neck seal (2), a sealing clamp (3) and a water seal (4). The sealing cover (1) is located at the end of the bearing seat (5). The roll neck seal (2) is installed between the tapered sleeve (7) and the roll (8). The sealing clamp (3) is installed on the roll neck seal (2). The water seal (4) is installed on the end face of the sealing cover (1). The side of the water seal (4) away from the sealing cover (1) has a water sealing leg (4.1).

2. The sealing mechanism based on an oil film bearing according to claim 1, characterized in that: The circumferential surface of the sealing cap (1) is in contact with the circumferential surface of the roller neck seal (2).

3. The sealing mechanism based on an oil film bearing according to claim 1, characterized in that: The working surface of the sealing cover (1) is ceramic sprayed to enhance wear resistance, and the sealing working surface (2.2) of the roller neck seal (2) is a special rubber that is both high temperature resistant and wear resistant.

4. The sealing mechanism based on an oil film bearing according to claim 1, characterized in that: The roller neck seal (2) has a water-blocking limb (2.1) on the side near the bushing (6).

5. The sealing mechanism based on an oil film bearing according to claim 1, characterized in that: A sealing cavity is formed between the roller neck seal (2), the sealing cover (1), and the bearing seat (5).

6. The sealing mechanism based on an oil film bearing according to claim 1, characterized in that: A water accumulation cavity is formed between the roller neck seal (2), the sealing cover (1) and the water seal (4), and a water outlet (1.1) is provided on the end face of the sealing cover (1) located at the lower part of the bearing seat (5).

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