Bearing for cold rolling temper mill

Abstract

The utility model relates to the technical field of bearings, and discloses a bearing for a cold rolling temper mill, which comprises an inner ring, an outer ring, four retainers and plastic body oil, a plurality of connecting holes are arranged at the upper end of the inner ring, bolts are in threaded connection with the interiors of the connecting holes, a plurality of mounting holes are arranged at one end of a mounting ring opposite to the outer ring, and the mounting ring is in threaded connection with the outer ring. Sealing rings are fixedly arranged at the opposite ends of the mounting ring and the outer ring, a plurality of rollers are rotationally arranged between every two opposite retainers, and the plastic oil is injected into gaps and surfaces of the assembled rollers and the retainers through an injection molding process. According to the utility model, the plastic oil and the oil gas are used for lubrication, so that the leakage of lubricating oil can be effectively avoided, the oil-gas lubrication frequency is reduced, the cost is reduced, the device is suitable for stable operation of the cold rolling temper mill, and the matching cost of equipment is reduced through standardized butt joint of the mounting holes, the temper mill journal and the bearing seat without additional adaptive transformation.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to bearings for cold rolling mills. Background Technology

[0002] The cold rolling leveling mill is a key piece of equipment in the production of cold-rolled steel strip. Its function is to improve the shape of the steel strip, enhance its surface quality, and adjust its mechanical properties through rolling. As the core component of the cold rolling leveling mill, the bearing needs to work stably under high load, high speed, and continuous operation conditions. Its lubrication effect directly affects the stability of equipment operation and the quality of steel strip.

[0003] Most existing bearings used in cold rolling mills employ oil-air lubrication, which involves continuously or intermittently introducing an oil-air mixture into the bearing. However, in oil-air lubrication, the lubricating oil exists in a mist or droplet form, making it prone to leakage from the bearing due to sealing gaps, pressure fluctuations, etc. Leaked lubricating oil directly contaminates the surface of the steel strip, leading to strip degradation or scrapping. To ensure lubrication effectiveness, oil-air lubrication requires frequent supply, especially under high-load conditions. This not only consumes a large amount of lubricating oil but also increases compressed air and equipment operating energy consumption. The oil film in oil-air lubrication is easily affected by changes in speed and load, and insufficient lubrication is likely to occur during start-up, shutdown, or low-speed phases, leading to accelerated bearing wear.

[0004] Therefore, those skilled in the art have provided bearings for cold rolling mills to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a bearing for a cold rolling mill. Through plastic oil and oil-air lubrication, it can effectively avoid lubricating oil leakage, reduce the frequency of oil-air lubrication, and lower costs. It is suitable for the stable operation of cold rolling mills. Through the standardized docking of the mounting holes with the mill journal and bearing housing, no additional adaptation or modification is required, thus reducing equipment matching costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A bearing for a cold rolling mill includes an inner ring, an outer ring, four cages, and a plastic oil. The upper end of the inner ring has multiple connecting holes, each with a threaded bolt. The mounting ring and the opposite end of the outer ring each have multiple mounting holes, and sealing rings are fixedly installed on the opposite ends of the mounting ring and the outer ring. Multiple rollers are rotatably mounted on the four cages in pairs. The plastic oil is injection molded or compression molded into the gap and surface between the assembled rollers and the cages, preferably using injection molding.

[0008] Furthermore, the external parts of the multiple bolts are respectively disposed inside the mounting ring, both of the sealing rings are made of rubber, and the mounting ring is fixedly disposed on the upper end of the inner ring by multiple bolts.

[0009] Furthermore, both the inner ring and the outer ring are made of bearing steel, and the inner ring and the outer ring are concentrically arranged.

[0010] Furthermore, the plasticizing oil is a high molecular polymer material, which has micropores inside, and saturated lubricating oil is adsorbed in the micropores.

[0011] Furthermore, the lubricating oil is stored in the micropores of the polymer based on surface tension, and moves to the surface of the polymer through capillary action when the bearing is running, and is drawn back into the micropores when the bearing stops running.

[0012] Furthermore, the contact area between the roller and the cage, the outer peripheral surface of the roller, and the inner sidewall of the cage are covered with plastic oil.

[0013] Furthermore, the outer circumferential surface of the inner ring corresponds to the inner sidewall of the roller, and the inner circumferential surface of the outer ring corresponds to the outer sidewall of the roller, and the roller can roll along the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring.

[0014] This utility model has the following beneficial effects:

[0015] 1. The bearing for a cold rolling mill proposed in this utility model involves assembling the movable shaft into a cage, then fitting the rollers onto the movable shaft. Next, an injection molding machine is used to coat the bearing with plastic oil. The inner and outer rings are then assembled, ensuring the inner ring fits against the inner side of the roller and the outer ring fits against the outer side of the roller, forming a rigid fit. During installation, bolts are screwed into the inner ring connection hole via the mounting ring for tightening. The assembly is then fixed to the mill journal via the mounting holes on the mounting ring. Finally, the bearing housing is connected to the lower mounting hole of the outer ring. The rigid support of the inner and outer rings serves as the installation reference for the entire bearing, ensuring assembly accuracy. No additional adaptation or modification is required, reducing equipment matching costs. During operation, the lubricating oil seeping from the plastic oil forms an oil film at the contact points between the rollers and the inner and outer rings and the movable shaft. Simultaneously, oil-air lubrication replenishes a small amount of lubricating oil, providing double protection for lubrication. After operation stops, the plastic oil reabsorbs the lubricating oil, leaving no leakage residue.

[0016] 2. The bearing for a cold rolling mill proposed in this utility model uses a plastic oil as a solid polymer matrix. The lubricating oil is stored inside the polymer through micropores, rather than in a free state. Even when the bearing is running or vibrating, the lubricating oil only seeps out in small amounts through capillary action, without leakage. When the bearing stops running, the lubricating oil is drawn back into the micropores, further preventing overflow and fundamentally eliminating the risk of steel strip contamination. The plastic oil can continuously release lubricating oil, and the lubricating oil stored in the micropores can be supplied slowly over a long period of time. When combined with oil-air lubrication, oil-air lubrication does not need to be supplied frequently, reducing lubricating oil consumption and compressed air energy consumption. Long-term use can save lubrication costs. The plastic oil is not affected by speed or load. At high speed, the capillary action is enhanced, and the amount of lubricating oil seeping out increases slightly to meet lubrication needs. At low speed or during start-stop, the amount of seeping out is stable, reducing bearing wear and extending service life. The cage fixes the rollers through a movable shaft, preventing the rollers from shifting under high loads and enhancing the connection stability between the rollers and the cage, adapting to the high-load working conditions of the cold rolling mill. Attached Figure Description

[0017] Figure 1 This is an isometric schematic diagram of the entire utility model;

[0018] Figure 2 This is an isometric view of the present invention near the roller;

[0019] Figure 3 This is an exploded isometric view of the present invention near the mounting ring;

[0020] Figure 4 This is a frontal axonometric view of the present invention, close to the roller.

[0021] Figure 5 This is a top-view isometric schematic diagram of the present invention, close to the roller.

[0022] Legend:

[0023] 1. Inner ring; 2. Mounting ring; 3. Sealing ring; 4. Outer ring; 5. Mounting hole; 6. Cage; 7. Roller; 8. Connecting hole; 9. Bolt. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1-5 One embodiment provided by this utility model:

[0026] The bearing for a cold rolling mill includes an inner ring 1, an outer ring 4, four cages 6, and a plastic oil. The upper end of the inner ring 1 has multiple connecting holes 8, and bolts 9 are threaded into the multiple connecting holes 8. The mounting ring 2 and the opposite end of the outer ring 4 each have multiple mounting holes 5. Sealing rings 3 are fixedly installed on the opposite end of the mounting ring 2 and the outer ring 4. Multiple rollers 7 are rotatably arranged between the four cages 6 in pairs. The plastic oil is injection molded or molded into the gap and surface between the assembled rollers 7 and the cages 6 by injection molding or compression molding, preferably by injection molding.

[0027] Multiple bolts 9 are respectively set inside the mounting ring 2. Both sealing rings 3 are made of rubber. The mounting ring 2 is fixed to the upper end of the inner ring 1 by multiple bolts 9. Both the inner ring 1 and the outer ring 4 are made of bearing steel. The inner ring 1 and the outer ring 4 are concentrically set. The plastic oil is a high molecular polymer material. The high molecular polymer material has micropores inside. Saturated lubricating oil is adsorbed in the micropores. The lubricating oil is stored in the micropores of the high molecular polymer based on surface tension. When the bearing is running, it moves to the surface of the high molecular polymer through capillary action. When the bearing stops running, it is drawn back into the micropores. The contact part between the roller 7 and the cage 6, the outer peripheral surface of the roller 7 and the inner side wall of the cage 6 are covered with plastic oil. The outer peripheral surface of the inner ring 1 is set to correspond with the inner side wall of the roller 7. The inner peripheral surface of the outer ring 4 is set to correspond with the outer side wall of the roller 7. The roller 7 can roll along the outer peripheral surface of the inner ring 1 and the inner peripheral surface of the outer ring 4.

[0028] Specifically, during assembly, the movable shaft is installed into the cage 6, and then the roller 7 is fitted onto the movable shaft to form the roller 7 assembly. Next, using an injection molding machine, plastic oil is injected into the gap between the roller 7 and the cage 6, the outer circumferential surface of the roller 7, and the inner wall of the cage 6 to form an integrated lubrication structure. After the plastic oil injection is completed, the inner ring 1 and the outer ring 4 are assembled to the outside of the assembly, so that the inner ring 1 fits against the inner side of the roller 7 and the outer ring 4 fits against the outer side of the roller 7, completing the overall bearing structure assembly. The mounting ring 2 is inserted into it by bolts 9 and is connected to the inner ring 1. The connecting hole 8 on ring 1 is threaded to achieve a fixed connection between the mounting ring 2 and the inner ring 1. Then, it is fixed to the leveling machine journal through the mounting hole 5 on the mounting ring 2. The mounting hole 5 at the lower end of the outer ring 4 is used to connect with the bearing housing. The rubber sealing ring 3 at the end of the mounting ring 2 and the outer ring 4 has elastic deformation capability and can tightly fit adjacent parts to form a double seal, thereby extending the service life of the bearing. The inner ring 1 and the outer ring 4 serve as the main support structure of the bearing, providing a rigid mounting reference for the entire bearing and ensuring that the bearing maintains structural stability during operation.

[0029] During equipment operation, the bearing rotates synchronously with the leveling machine shaft, and the roller 7 rolls around the movable shaft and the inner and outer rings 4. The outer circumferential surface of the inner ring 1 and the inner circumferential surface of the outer ring 4 serve as the rolling track of the roller 7, ensuring that the roller 7 always moves along the predetermined trajectory and avoiding radial deviation. The plastic oil releases lubricating oil during operation, forming a stable lubricating film at the contact points between the roller 7 and the inner and outer rings 4 and the movable shaft. With the addition of a small amount of lubricating oil by the external oil-air lubrication system, a dual lubrication guarantee mechanism is achieved, ensuring that the bearing can maintain a good lubrication state under various working conditions. When the equipment stops operating, the micropores inside the plastic oil shrink, and the lubricating oil is drawn back into the micropores through capillary action, avoiding lubricant residue or leakage, and achieving an environmentally friendly, efficient, and low-maintenance lubrication method.

[0030] When the journal of the leveling machine rotates, the inner ring 1 rotates synchronously with the journal. Under the precise guidance of the cage 6, the roller 7 rolls along the outer circumferential surface of the inner ring 1 and the inner circumferential surface of the outer ring 4. Both the outer circumferential surface of the inner ring 1 and the inner circumferential surface of the outer ring 4 are arc-shaped raceways. On the one hand, the curved surface contact reduces the frictional resistance of the roller 7 during rolling, thereby reducing operating energy consumption. On the other hand, by taking advantage of the line contact characteristics between the roller 7 and the raceway, the radial force generated during the rolling process is efficiently transmitted to the outer ring 4, and then distributed to the bearing housing and frame through the outer ring 4, thereby achieving stable rotational support and load bearing for the journal. At the same time, the arc-shaped raceway, as the constraint track of the roller 7, can strictly limit its movement trajectory and effectively avoid radial deviation.

[0031] The cage 6 ensures that the rollers 7 are evenly distributed between the inner ring 1 and the outer ring 4, preventing the rollers 7 from colliding and rubbing against each other. Its symmetrical structure ensures that the rollers 7 are evenly stressed, preventing deformation under high loads. The cage 6 is made of brass, which has excellent wear resistance and thermal conductivity. Its distribution not only prevents the rollers 7 from colliding and rubbing against each other, but also ensures that the rollers 7 are evenly stressed through the symmetrical layout, avoiding the risk of deformation under high loads and improving the smoothness of bearing operation. The rollers 7 are all made of bearing steel and are chrome-plated to enhance their rust resistance, reducing downtime caused by corrosion or deformation. A high-strength movable shaft is fitted inside its central through hole. The movable shaft has a higher hardness than the rollers 7 and its diameter is slightly smaller than the through hole inside the rollers 7. The length of the movable shaft matches that of the cage 6. This movable shaft provides rigid support to prevent the rollers 7 from bending under stress and ensures that their rotation trajectory is stable. During operation, the rollers 7 roll synchronously around the movable shaft, the inner ring 1 raceway, and the outer ring 4 raceway, thereby converting sliding friction into rolling friction and reducing the coefficient of friction.

[0032] The plastic bearing oil uses polyurethane polymer as its matrix, with uniformly distributed micropores of 5-10 μm diameter inside. Saturated extreme-pressure lithium-based lubricating oil, comprising 30%-40% of the total mass of the plastic bearing oil, is adsorbed within these micropores. Through injection molding at 120-150℃ and 0.5-1 MPa, it covers the gap between the roller 7 and the cage 6, the outer circumferential surface of the roller 7, and the inner wall of the cage 6 with a thickness of 0.1-0.3 mm. During bearing operation, the frictional heat generated between the roller 7 and the cage 6 causes the micropores to expand, allowing the lubricating oil to flow through capillary action. The lubricant seeps into the contact surface at a speed of 1500 r / min, with a seepage rate of approximately 0.01 g / h. This lubricant, together with a small amount of lubricating oil supplied by external oil-air lubrication, forms an oil film. After shutdown, the temperature decreases, causing the micropores to shrink. Under the action of surface tension, the lubricating oil is drawn back into the micropores, achieving a closed loop of dynamic oil supply and automatic recovery, thus avoiding leakage and waste. The oil resistance and temperature resistance of the polyurethane matrix allow it to stably adapt to cold rolling conditions. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Working principle: During assembly, first, the movable shaft is installed into the cage 6, then the roller 7 is fitted onto the movable shaft. Next, injection molding oil is used to inject plastic onto the assembled structural surface and gaps. Finally, the inner ring 1 and outer ring 4 are assembled onto the outer side, so that the inner ring 1 fits against the inner side of the roller 7, and the outer ring 4 fits against the outer side of the roller 7. When connecting the mounting ring 2 and the inner ring 1, bolt 9 is inserted into the mounting ring 2. Then, bolt 9 is tightened using a tool, connecting bolt 9 and the connecting hole 8. Finally, it is fixed to the journal of the leveling machine through the mounting hole 5 on the mounting ring 2. Then, the bearing... The seat is connected to the mounting hole 5 at the lower end of the outer ring 4. The rigid support of the inner ring 1 and the outer ring 4 provides the installation reference for the entire bearing. During operation, the bearing rotates with the leveling machine shaft, and the roller 7 rolls around the movable shaft and the inner and outer rings 4. The outer circumferential surface of the inner ring 1 and the inner circumferential surface of the outer ring 4 serve as the rolling track of the roller 7, ensuring that the roller 7 rotates along a fixed track and avoiding radial deviation. The lubricating oil seeping out of the plastic body forms an oil film at the contact points between the roller 7 and the inner and outer rings 4 and the movable shaft. At the same time, the oil-air lubrication supplements a small amount of lubricating oil, providing double protection for the lubrication effect. After the operation stops, the plastic body oil is drawn back into the lubricating oil, leaving no leakage residue.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bearing for a cold rolling mill, comprising an inner ring (1), an outer ring (4), four cages (6), and a plastic oil, characterized in that: The inner ring (1) has multiple connecting holes (8) at its upper end, and bolts (9) are threaded into each of the multiple connecting holes (8). The inner ring (1) has an mounting ring (2) at its upper end. The mounting ring (2) and the outer ring (4) each have multiple mounting holes (5) at their opposite ends. The mounting ring (2) and the outer ring (4) each have a sealing ring (3) fixedly installed at their opposite ends. The four retainers (6) have multiple rollers (7) rotatably arranged between each other. The plastic oil is injection molded or molded into the gap and surface between the assembled rollers (7) and the retainers (6) by injection molding or compression molding.

2. The bearing for a cold rolling mill according to claim 1, characterized in that: Multiple bolts (9) are respectively set inside the mounting ring (2) on the outside. Both sealing rings (3) are made of rubber. The mounting ring (2) is fixedly set on the upper end of the inner ring (1) by multiple bolts (9).

3. The bearing for a cold rolling mill according to claim 1, characterized in that: Both the inner ring (1) and the outer ring (4) are made of bearing steel, and the inner ring (1) and the outer ring (4) are concentrically arranged.

4. The bearing for a cold rolling mill according to claim 1, characterized in that: The plasticizing oil is a high molecular polymer material, which has micropores inside, and saturated lubricating oil is adsorbed in the micropores.

5. The bearing for a cold rolling mill according to claim 4, characterized in that: The lubricating oil is stored in the micropores of the polymer based on surface tension, and moves to the surface of the polymer through capillary action when the bearing is running, and is drawn back into the micropores when the bearing stops running.

6. The bearing for a cold rolling mill according to claim 1, characterized in that: The contact area between the roller (7) and the cage (6), the outer peripheral surface of the roller (7) and the inner sidewall of the cage (6) are covered with plastic oil.

7. The bearing for a cold rolling mill according to claim 1, characterized in that: The outer circumferential surface of the inner ring (1) is correspondingly arranged with the inner sidewall of the roller (7), and the inner circumferential surface of the outer ring (4) is correspondingly arranged with the outer sidewall of the roller (7), and the roller (7) can roll along the outer circumferential surface of the inner ring (1) and the inner circumferential surface of the outer ring (4).

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