Rolling mill oil film bearing operation control method, device, equipment and medium

Abstract

The invention discloses a rolling mill oil film bearing operation control method and device, equipment and a medium, and the method comprises the steps: determining the target oil film oil flow of a target oil film bearing according to the capacity requirement of an oil film bearing operation control system and the designed oil film oil flow of the target oil film bearing; the actual oil film oil flow of the target oil film bearing is controlled to reach the target oil film oil flow; monitoring the operation temperature of the target oil film bearing; and under the state that the operation temperature reaches the preset early warning temperature, the actual oil film oil liquid flow is controlled to exceed the target oil film oil liquid flow, and the cooling liquid is controlled to flow in the target cooling pipeline at the first preset flow. The heat conduction capability of the oil film bearing base is improved by dynamically regulating and controlling the synergic cooperation of the oil film oil flow and the cooling liquid flow, so that the temperature of the oil film bearing is effectively reduced, the burning loss risk caused by high temperature is reduced, the productivity jump is realized, the optimization cost is reduced, the production continuity is guaranteed, and the production efficiency is improved. And the method has remarkable engineering practical value and economic benefit.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical processes, and particularly to a method, device, equipment and medium for controlling the operation of an oil film bearing of a rolling mill. Background Art

[0002] An oil film bearing is a sliding bearing that relies on a pressure oil film formed by lubricating oil between rotating and stationary components to support the load and reduce friction. Due to its advantages such as strong load-bearing capacity and reliable operation, it is widely used in fields such as large rolling mills.

[0003] With the continuous increase in the production capacity of rolling mill production lines, the oil film bearing has suffered burnout due to exceeding the initial design production capacity. The commonly adopted optimization and improvement solutions for oil film bearings involve the transformation of a large number of other production equipment, resulting in huge optimization costs. Therefore, how to provide a low-cost optimization solution for oil film bearings is a technical problem that urgently needs to be solved currently. Summary of the Invention

[0004] Embodiments of the present application provide a method, device, equipment and medium for controlling the operation of an oil film bearing of a rolling mill, solving the technical problem of huge costs in the existing optimization and improvement solutions for oil film bearings in the prior art, and achieving the technical effect of reducing the optimization cost of oil film bearings.

[0005] In a first aspect, the present application provides a method for controlling the operation of an oil film bearing of a rolling mill, which is matched with an oil film bearing operation control system. The oil film bearing operation control system includes a target oil film bearing base and a target cooling pipeline connected to the target oil film bearing base. A target oil film bearing is provided in the target oil film bearing base, and a coolant is contained in the target cooling pipeline. The method includes:

[0006] Determine the target oil film oil flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing;

[0007] Control the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate;

[0008] Monitor the operating temperature of the target oil film bearing;

[0009] In a state where the operating temperature reaches a preset warning temperature, control the actual oil film oil flow rate to exceed the target oil film oil flow rate, and control the coolant to flow in the target cooling pipeline at a first preset flow rate.

[0010] In some embodiments of the present application, based on the foregoing solution, determining the target oil film oil flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing includes:

[0011] Determine the oil film oil flow rate to be verified for the target oil film bearing according to the production capacity requirements and the designed oil film oil flow rate.

[0012] When the oil film oil flow rate to be verified meets the preset verification relationship, determine the oil film oil flow rate to be verified as the target oil film oil flow rate.

[0013] In some embodiments of the present application, based on the foregoing solution, the method further includes:

[0014] When the operating temperature is in a state that meets the preset normal temperature, control the coolant to flow in the target cooling pipeline at a second preset flow rate that is less than the first preset flow rate.

[0015] In some embodiments of the present application, based on the foregoing solution, the oil film bearing operating system includes a plurality of single oil film bearing bases. Each single oil film bearing base is provided with a single oil film bearing, and each single oil film bearing base is connected to at least one single cooling pipeline. Before determining the target oil film oil flow rate of the target oil film bearing according to the production capacity requirements of the oil film bearing operating control system and the designed oil film oil flow rate of the target oil film bearing, the method further includes:

[0016] Control the coolant in each single cooling pipeline to flow at the second preset flow rate;

[0017] Monitor the single operating temperature of each single oil film bearing;

[0018] When the single operating temperature of any one reaches the preset warning temperature, determine the single oil film bearing with the single operating temperature reaching the preset warning temperature as the target oil film bearing, and determine the target cooling pipeline corresponding to the target oil film bearing.

[0019] In some embodiments of the present application, based on the foregoing solution, the method includes:

[0020] When the operating temperature exceeds the preset warning temperature and reaches the preset ultra-high alarm temperature, reduce the rolling speed in the oil film bearing operating control system to make the taper bushing fit of the target oil film bearing readapt until the roll of the oil film bearing operating control system is unloaded from the machine.

[0021] During the process of unloading the roll from the machine, control the coolant to flow in the target cooling pipeline at the first preset flow rate.

[0022] In some embodiments of the present application, based on the foregoing solution, when the operating temperature reaches the preset warning temperature, control the actual oil film oil flow rate to exceed the target oil film oil flow rate, and control the coolant to flow in the cooling pipeline at the first preset flow rate, including:

[0023] When the operating temperature reaches the preset warning temperature, control the actual oil film oil flow rate to exceed the target oil film oil flow rate;

[0024] When the actual oil film oil flow rate increases to the preset upper limit value and the operating temperature still reaches the preset warning temperature, control the coolant to flow in the target cooling pipeline at the first preset flow rate.

[0025] In some embodiments of the present application, based on the foregoing solution, the method for determining the first preset flow rate includes:

[0026] Determine the aggregation temperature of the target oil film bearing according to the ambient temperature of the target oil film bearing, the preset equilibrium temperature, and the heat balance relationship;

[0027] Determine the first preset flow rate according to the aggregation temperature and the thermal conductivity of the coolant.

[0028] In a second aspect, the present application provides an operating control device for a rolling mill oil film bearing, which is matched with an oil film bearing operating control system. The oil film bearing operating control system includes a target oil film bearing base and a target cooling pipeline connected to the target oil film bearing base. A target oil film bearing is provided in the target oil film bearing base, and the target cooling pipeline contains a coolant. The device includes:

[0029] A target oil film oil flow rate determination module, configured to determine the target oil film oil flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing operating control system and the designed oil film oil flow rate of the target oil film bearing;

[0030] An oil film bearing control module, configured to control the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate;

[0031] An operating temperature monitoring module, configured to monitor the operating temperature of the target oil film bearing;

[0032] A preset warning temperature control module, configured to control the actual oil film oil flow rate to exceed the target oil film oil flow rate and control the coolant to flow in the target cooling pipeline at the first preset flow rate when the operating temperature reaches the preset warning temperature.

[0033] In a third aspect, the present application provides an electronic device, including:

[0034] A processor;

[0035] A memory for storing instructions executable by the processor;

[0036] Wherein, the processor is configured to execute to implement an operating control method for a rolling mill oil film bearing as provided in the first aspect.

[0037] Fourthly, the present application provides a non-transitory computer-readable storage medium. When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute a method for controlling the operation of a rolling mill oil film bearing as provided in the first aspect.

[0038] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0039] The embodiments of the present application provide a method for controlling the operation of a rolling mill oil film bearing, including: determining the target oil film oil flow rate of a target oil film bearing according to the production capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing; controlling the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate; monitoring the operating temperature of the target oil film bearing; and when the operating temperature reaches the preset warning temperature, controlling the actual oil film oil flow rate to exceed the target oil film oil flow rate and controlling the coolant to flow in the target cooling pipeline at a first preset flow rate. It can be seen that through the coordinated cooperation of dynamically regulating the oil film oil flow rate and the coolant flow rate, the embodiments of the present application increase the heat conduction capacity of the oil film bearing base, thereby effectively reducing the temperature of the oil film bearing, reducing the risk of burnout caused by the melting of babbit alloy due to high temperature, prolonging the service life of the oil film bearing, reducing the optimization cost and the risk of unplanned shutdown, and ensuring production continuity when the system needs to achieve a production capacity leap, which has significant engineering practical value and economic benefits. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 It is a schematic structural diagram of an oil film bearing operation control system provided by an embodiment of the present application;

[0042] Figure 2 It is a schematic flow diagram of a method for controlling the operation of a rolling mill oil film bearing provided by an embodiment of the present application;

[0043] Figure 3 It is a schematic structural diagram of a device for controlling the operation of a rolling mill oil film bearing provided by an embodiment of the present application;

[0044] Figure 4 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0045] In the above figures: 1. Rolling mill; 201. Oil film bearing base; 301. Main refrigerant pipeline; 302. Cooling pipeline; 401. Main valve; 402. Branch valve. Detailed implementation mode

[0046] By providing a method for controlling the operation of an oil film bearing of a rolling mill in an embodiment of the present application, the technical problem of the huge cost of the existing optimization and improvement scheme for the oil film bearing is solved.

[0047] The technical solution of the embodiment of the present application for solving the above technical problem has the following general idea:

[0048] The embodiment of the present application provides a method for controlling the operation of an oil film bearing of a rolling mill, which is matched with an oil film bearing operation control system. The oil film bearing operation control system includes a target oil film bearing base and a target cooling pipeline connected to the target oil film bearing base. A target oil film bearing is arranged in the target oil film bearing base, and the target cooling pipeline contains a coolant. The method includes: determining the target oil film oil flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing; controlling the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate; monitoring the operating temperature of the target oil film bearing; in a state where the operating temperature reaches a preset warning temperature, controlling the actual oil film oil flow rate to exceed the target oil film oil flow rate, and controlling the coolant to flow in the target cooling pipeline at a first preset flow rate. It can be seen that by dynamically regulating the coordinated cooperation of the oil film oil flow rate and the coolant flow rate in the embodiment of the present application, the heat conduction capacity of the oil film bearing base is increased, thereby effectively reducing the temperature of the oil film bearing, reducing the risk of burnout caused by the melting of the babbit alloy due to high temperature, extending the service life of the oil film bearing, reducing the optimization cost and the risk of unplanned shutdown, and ensuring production continuity when the system needs to achieve a production capacity leap, which has significant engineering practical value and economic benefits.

[0049] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation modes.

[0050] First, it should be noted that the term "and / or" appearing in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the front and back associated objects.

[0051] It should be noted that in the description and claims of this application and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the objects so used can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described.

[0052] It should be noted that unless otherwise clearly specified and defined, the terms "connected", "installed", "connected to", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] As a typical structure of sliding bearings, oil film bearings achieve hydrodynamic lubrication through the pressure oil film formed between the rotating journal and the bearing bush. Its core advantages lie in high load-carrying capacity and low friction coefficient. In the application of hot strip mills, this type of bearing uses babbit alloy as the antifriction layer of the bearing bush, and its excellent embedability and conformability can effectively compensate for the misalignment deviation of the shafting. However, when the integrity of the lubricating oil film is damaged, the instantaneous high temperature caused by direct metal contact will lead to the melting failure of the babbit alloy layer. This phenomenon is called "burnout". In severe cases, it will cause the bearing and the journal to seize, forcing the equipment to stop. The occurrence of burnout will not only affect the normal operation of the equipment, but also increase the maintenance cost and downtime, seriously affecting production efficiency and product quality.

[0054] The design of the current oil film bearing system is based on the theory of elastohydrodynamic lubrication. Its core parameters such as bearing clearance, lubricating oil viscosity, and oil supply volume are determined according to the original design production capacity of the production line. However, when the production line realizes a production capacity leap by increasing the slab weight and shortening the rolling rhythm, etc., the load of the oil film bearing will exceed the design limit. Practice has shown that when the actual production capacity exceeds the design threshold, the working temperature of the bearing rises significantly, the oil film thickness decreases, and the oil film thickness ratio approaches the critical point. At this time, any process fluctuation may cause the oil film to rupture, resulting in an exponential increase in the probability of burnout.

[0055] Therefore, in order to enable the current oil film bearing system to adapt to the production capacity leap, it is often necessary to expand and transform the system. However, the system expansion and transformation need to follow the principle of coordinated dimension chain. The support roll neck, the inner hole of the bearing housing and the lubrication system must be transformed synchronously. This systematic transformation not only involves machining, but also requires adjusting the parameters of the hydraulic system, resulting in high transformation costs. Secondly, most of the traditional transformation and optimization schemes focus on the upgrade of the lubrication system. However, limited by the existing pipeline layout space and the oil supply response speed, it is difficult to match the high-frequency dynamic load characteristics of modern rolling mills. This high-cost and long-cycle transformation mode is in sharp contradiction with the demand of the iron and steel industry for cost reduction and efficiency improvement, and there is an urgent need to develop a low-cost adaptive optimization scheme based on the existing equipment architecture.

[0056] To solve the above problems, the embodiments of the present application provide an operation control method for an oil film bearing of a rolling mill, which is matched with an oil film bearing operation control system provided by the embodiments of the present application.

[0057] First, the embodiments of the present application will first describe the oil film bearing operation control system. As Figure 1 shown, it is a schematic structural diagram of an oil film bearing operation control system provided by the embodiments of the present application, including a plurality of oil film bearing bases 201. An oil film bearing (not shown in the figure) is provided in each oil film bearing base 201, and at least one cooling pipeline 302 (only one is shown in the figure) is connected to the outside of each oil film bearing base 201. The cooling pipeline 302 contains a coolant to increase the heat conduction capacity from the outside, so as to reduce the heat generated by the oil film bearing. It should be noted that Figure 1 only the case with one rolling mill 1 is shown here, and those skilled in the art can make an adaptive understanding based on Figure 1 the cases with multiple rolling mills 1 or each oil film bearing base 201 connected with multiple cooling pipelines 302.

[0058] The rolling mill 1 is divided into a drive side and an operation side. The drive side refers to the side where the main drive system of the rolling mill 1 is installed, usually the layout area of power transmission equipment such as motors, speed reducers, and gearboxes; the operation side refers to the side of the rolling mill 1 facing the operator, usually the layout area of the rolling mill 1 operation console, control panel, and auxiliary equipment. Exemplarily, in Figure 1 the figure, the drive side is located on the left side of the rolling mill 1, and the operation side 1 is located on the right side of the rolling mill.

[0059] Oil film bearings are provided on both the drive side and the operation side. The oil film bearing on the drive side mainly bears the dynamic load brought by power transmission, while the oil film bearing on the operation side focuses on the support and alignment functions. Correspondingly, the cooling pipelines 302 extend towards the oil film bearings corresponding to the drive side and the operation side respectively. Since the oil film bearings on the same side have similar requirements for heat dissipation capacity, in order to simplify the connection relationship between multiple cooling pipelines 302, for the same rolling mill 1, the cooling pipelines 302 on the drive side and the cooling pipelines 302 on the operation side can be integrated separately.

[0060] Specifically, the oil film bearing operation control system includes a main refrigerant pipeline 301 and cooling pipelines 302. The main refrigerant pipeline 301 is connected to the coolant system of the rolling mill 1 to provide coolant and form a coolant circulation. The main refrigerant pipeline 301 is divided into two branches. One branch extends towards the drive side of the rolling mill 1, and the other branch extends towards the operation side of the rolling mill 1. Each branch extends multiple cooling pipelines 302, and each cooling pipeline 302 is connected to the oil film bearing base 201 on the corresponding side, so that each oil film bearing base 201 of the rolling mill 1 is connected with a separate cooling pipeline 302 to achieve precise temperature reduction adjustment.

[0061] A main valve 401 is provided on the main refrigerant pipeline 301 to control the coolant flow rate flowing into the subsequent cooling pipelines 302. A branch valve 402 is also provided on each cooling pipeline 302 to separately control the coolant flow rate flowing through the corresponding oil film bearing base 201. Exemplarily, the main valve 401 and the branch valve 402 achieve flow control by adjusting their own opening degrees.

[0062] It can be understood that in the case where the oil film bearing base 201 is integrated or closely fitted with the upper and lower support roll bearing bases (not shown in the figure), the connection relationship between the two usually shows that the oil film bearing base 201 is embedded or fixed inside the upper and lower support rod bearing bases, then the cooling pipeline 302 can be connected to the outside of the corresponding upper and lower support roll bearing bases.

[0063] To facilitate the description of a method for controlling the operation of the oil film bearing of a rolling mill provided by the embodiments of the present application, in the subsequent embodiments, the oil film bearing base 201 is divided into a single oil film bearing base and a target oil film bearing base. The target oil film bearing base refers to a single oil film bearing base whose operating temperature of the contained oil film bearing exceeds a preset warning temperature. For those skilled in the art, the components and physical quantities corresponding to "single" and "target" in the subsequent embodiments can be understood similarly adaptively. For example, the target oil film bearing is a single oil film bearing whose operating temperature exceeds the preset warning temperature; the target cooling pipeline is the single cooling pipeline corresponding to the target oil film bearing base.

[0064] After the above description of the oil film bearing operation control system, the embodiments of the present application will further describe a method for controlling the operation of a rolling mill oil film bearing as follows.

[0065] As Figure 2 shown, it is a schematic flowchart of a method for controlling the operation of a rolling mill oil film bearing provided by the present application, including step S21-step S24.

[0066] Step S21, determine the target oil film oil flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing;

[0067] Step S22, control the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate;

[0068] Step S23, monitor the operating temperature of the target oil film bearing;

[0069] Step S24, in the state where the operating temperature reaches the preset warning temperature, control the actual oil film oil flow rate to exceed the target oil film oil flow rate, and control the coolant to flow in the target cooling pipeline at a first preset flow rate.

[0070] Regarding step S21, determining the target oil film oil flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing includes step S211-step S222.

[0071] Step S211, determine the oil film oil flow rate to be verified of the target oil film bearing according to the production capacity requirement and the designed oil film oil flow rate;

[0072] Step S222, in the case where the oil film oil flow rate to be verified conforms to the preset verification relationship, determine the oil film oil flow rate to be verified as the target oil film oil flow rate.

[0073] Regarding step S211, determine the oil film oil flow rate to be verified of the target oil film bearing according to the production capacity requirement and the designed oil film oil flow rate.

[0074] The production capacity requirement refers to the production capacity requirement corresponding to the current production stage of the target production line, generally exceeding the original designed production capacity of the target production line. The designed oil film oil volume corresponds to the production capacity requirement of the target production line in the design stage and matches the original designed production capacity.

[0075] The production capacity requirement reflects the output target that the rolling mill equipment needs to achieve per unit time (usually in hours, days or years), and can directly affect the operating load of the oil film bearing.

[0076] High production capacity requirements usually mean higher bearing loads and more stringent operating conditions. The oil film bearing must be able to maintain a stable oil film thickness and lubrication state under high loads and high speeds. When the production capacity requirement exceeds the design capacity of the oil film bearing, it will cause the temperature of the oil film bearing to rise, increase the risk of oil film rupture, and even trigger burnout failures.

[0077] In the process of determining the oil flow rate of the oil film to be verified, comparative analysis can also be carried out with similar production lines through the analogy method, and the original design production capacity of the similar production line matches the production capacity requirement of the target production line.

[0078] Regarding step S222, when the oil flow rate of the oil film to be verified meets the preset verification relationship, the oil flow rate of the oil film to be verified is determined as the target oil film flow rate.

[0079] The preset verification relationship includes four oil flow verification formulas for oil film bearings, namely the oil supply calculation formula based on the hydrodynamic lubrication theory, the minimum oil film thickness verification formula, the bearing temperature rise verification formula, and the end leakage flow verification formula. The above four flow verification formulas cover the key parameters in the design of oil film bearings, including oil supply, oil film thickness, temperature rise, and end leakage flow. The accuracy and applicability of the target oil film flow rate are enhanced through the four flow verification formulas, thereby optimizing the performance of the target oil film bearing and meeting the requirements of high-efficiency production.

[0080] When the oil film bearing operation system includes multiple single oil film bearing bases, each single oil film bearing base is provided with a single oil film bearing, and each single oil film bearing base is connected to at least one single cooling pipeline, before step S21 of determining the target oil film flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing operation control system and the designed oil film flow rate of the target oil film bearing, the method further includes steps S11 - S13.

[0081] Step S11, controlling the coolant in each single cooling pipeline to flow at a second preset flow rate;

[0082] Step S12, monitoring the single operation temperature of each single oil film bearing;

[0083] Step S13, when the single operation temperature of any one reaches the preset warning temperature, determining the single oil film bearing with the single operation temperature reaching the preset warning temperature as the target oil film bearing, and determining the target cooling pipeline corresponding to the target oil film bearing.

[0084] Regarding step S11, controlling the coolant in each single cooling pipeline to flow at a second preset flow rate.

[0085] The main function of the coolant is to absorb and transfer heat, and the second preset flow rate is less than the first preset flow rate. When the operating temperature of a single oil film bearing does not exceed the preset warning temperature, there is no need to absorb and transfer more heat through the corresponding single cooling pipeline. It only needs to flow at the second preset flow rate to ensure that there is enough time and contact area between the coolant and the base of the single oil film bearing for heat exchange, so as to improve the heat dissipation efficiency.

[0086] Regarding step S12, monitor the operating temperature of each single oil film bearing. The bearing temperature can be measured in real time by directly installing a thermocouple sensor on the outer ring of the target oil film bearing; or the radiant heat on the surface of the target oil film bearing can be measured by an infrared sensor, and the infrared sensor is suitable for occasions where it is difficult to install a contact sensor.

[0087] Regarding step S13, when the operating temperature of any single unit reaches the preset warning temperature, determine the single oil film bearing with the operating temperature reaching the preset warning temperature as the target oil film bearing, and determine the target cooling pipeline corresponding to the target oil film bearing.

[0088] The operating temperature of a single unit refers to the temperature generated during the normal operation of a device or component. The operating temperature is usually affected by various factors such as load, ambient temperature, and heat dissipation efficiency. The preset warning temperature can be determined based on the historical data of the oil film bearing operation control system and the heat-bearing capacity of the oil film bearing.

[0089] It can be understood that when the operating temperatures of multiple single units all reach the preset warning temperature, then determine all the single oil film bearings with the operating temperatures reaching the preset warning temperature as target oil film bearings, and respectively determine the target cooling pipelines corresponding to each target oil film bearing.

[0090] Regarding step S22, control the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate.

[0091] The actual oil film oil flow rate refers to the lubricating oil flow rate actually passing through the oil film during the operation of the target oil film bearing. The target oil film oil flow rate is obtained through step S21, aiming to ensure that the target oil film bearing operates in the best state, reduce the occurrence of burnout phenomena, and ensure that the thickness and pressure of the oil film are within an appropriate range, so as to achieve good lubrication effects and load-bearing capacities.

[0092] The oil film bearing operation control system can precisely control the oil film oil flow rate by adjusting parameters such as the pressure and valve opening of the oil supply system.

[0093] Regarding step S23, monitor the operating temperature of the target oil film bearing. The bearing temperature can be measured in real time by directly installing a thermocouple sensor on the outer ring of the target oil film bearing. Alternatively, the radiant heat on the surface of the target oil film bearing can be measured by an infrared sensor, which is suitable for occasions where it is difficult to install a contact sensor.

[0094] When the operating temperature is in a state that meets the preset normal temperature, control the coolant to flow in the target cooling pipeline at a second preset flow rate that is less than the first preset flow rate.

[0095] Regarding step S24, when the operating temperature reaches the preset warning temperature, control the actual oil film oil flow rate to exceed the target oil film oil flow rate, and control the coolant to flow in the target cooling pipeline at the first preset flow rate, including steps S2411 - S2412.

[0096] Step S2411, when the operating temperature reaches the preset warning temperature, control the actual oil film oil flow rate to exceed the target oil film oil flow rate;

[0097] Step S2412, when the actual oil film oil flow rate increases to the preset upper limit value and the operating temperature still reaches the preset warning temperature, control the coolant to flow in the target cooling pipeline at the first preset flow rate.

[0098] In steps S2411 - S2412, increasing the oil flow rate can increase the thickness and pressure of the oil film, thereby better lubricating the bearing, reducing friction and wear, and reducing the heat generated by friction. At the same time, more oil flow can carry away more heat, helping to reduce the bearing temperature and prevent the temperature from rising further.

[0099] When the actual oil film oil flow rate has increased to the preset upper limit value, but the operating temperature of the target oil film bearing still reaches the preset warning temperature, it indicates that the temperature cannot be effectively reduced only by increasing the actual oil film oil flow rate. Therefore, it is necessary to make the coolant flow in the target cooling pipeline at the first preset flow rate to absorb the heat of the target oil film bearing base, thereby indirectly reducing the temperature of the target oil film bearing and reducing the possibility of burnout.

[0100] Exemplarily, first, in combination with the rolling product types, rolling rhythms, and rolling process technical parameters of the target production line, calculate the heat generated by the target oil film bearing per unit time. Then, based on the oil supply volume and related parameters of the oil film bearing, use relevant formulas to calculate the heat that the oil film fluid can carry away and the corresponding theoretical temperature of the target oil film bearing. If the actually measured operating temperature of the target oil film bearing is higher than the theoretical temperature, it indicates that the heat dissipation capacity of the oil film fluid is insufficient. At this time, it is necessary to increase the flow rate of the coolant in the target cooling pipeline to cool the target oil film bearing base, thereby improving the heat conduction and heat dissipation capacity of the target oil film bearing base and maintaining the target oil film bearing at a lower equilibrium temperature state.

[0101] In step S24, the method for determining the first preset flow rate includes steps S2421 - S2422.

[0102] Step S2421: Determine the aggregation temperature of the target oil film bearing according to the ambient temperature, preset equilibrium temperature, and heat balance relationship of the target oil film bearing;

[0103] Step S2422: Determine the first preset flow rate according to the aggregation temperature and the thermal conductivity of the coolant.

[0104] The preset equilibrium temperature refers to the safe temperature that the target oil film bearing needs to maintain, usually lower than the melting point of the babbit alloy, that is, the temperature when the heat generated by the target oil film bearing and the heat dissipation capacity reach dynamic equilibrium. The aggregation temperature refers to the temperature increment accumulated during the operation of the target oil film bearing due to the frictional heat that cannot be completely dissipated, which is equal to the difference between the equilibrium temperature and the ambient temperature. When the preset equilibrium temperature of the target oil film bearing is certain, the higher the ambient temperature, the lower the required aggregation temperature. The aggregation temperature reflects the thermal load state of the bearing itself. The higher the aggregation temperature, the more frictional heat is generated by the bearing or the more insufficient the heat dissipation capacity. The factors affecting the aggregation temperature at least include rolling force, friction coefficient, and oil film linear velocity. Then, the theoretical basis of the above temperature control can be expressed by the following formula.

[0105] T 平衡 = T 环境 + T 聚集 ; (1)

[0106] T 聚集 = T 前1刻聚集 + △T; (2)

[0107] Q 总产生 = W 轧制力 = F 轧制力 × μ × V; (3)

[0108] Q 总带走 = Q 油膜 + Q 基座 ; (4)

[0109]

[0110] In the above formula, T 平衡 is the preset equilibrium temperature, T 环境 is the ambient temperature, T 聚集 is the aggregation temperature, Q 总产生 is the total heat generated by the target oil film bearing, W 轧制力 is the work done by the rolling force, F 轧制力 is the rolling force, μ is the friction coefficient, V is the oil film linear velocity, Q 总带走 is the total heat that the target oil film bearing needs to take away, Q 油膜 is the heat taken away by the oil film oil, Q 基座 is the heat conducted away through the base of the target oil film bearing, and C is the specific heat capacity of the oil.

[0111] It can be seen that when the equilibrium temperature of the target oil film bearing is constant, the higher the ambient temperature, the lower the aggregation equilibrium temperature of the oil film bearing needs to be to maintain the stability of the equilibrium temperature. When the heat removal capacity of the oil film oil remains unchanged, in order to achieve the target equilibrium temperature, it is necessary to improve the heat dissipation capacity of the base of the target oil film bearing, that is, to reduce the temperature of the base of the target oil film bearing through the coolant in the target cooling pipeline.

[0112] Regarding step S2422, according to the aggregation temperature and the thermal conductivity of the coolant, determine the first preset flow rate.

[0113] The thermal conductivity of the coolant is used to measure the heat conduction ability of the coolant, including the specific heat capacity, density, temperature, and contact area of the coolant. Combining relevant thermodynamics formulas, determine the first preset flow rate to ensure that the corresponding heat can be effectively taken away per unit time and maintain the operating temperature of the target oil film bearing in line with the preset equilibrium temperature.

[0114] It can be understood that the first preset flow rate at least conforms to the coolant flow rate matched when the opening degree of the corresponding branch valve of the target cooling pipeline is 100%.

[0115] Furthermore, there are different first preset flow rates corresponding to winter and summer. In winter, the ambient temperature is low, and the increase in the rolling rhythm and the decrease in the ambient temperature have a mutually offsetting effect on the equilibrium temperature of the oil film bearing, which is conducive to controlling the equilibrium temperature at a lower level, far from the melting point temperature of the babbit alloy. In summer, the ambient temperature is high, and the increase in the rolling rhythm and the increase in the ambient temperature have a superimposed effect on the equilibrium temperature of the oil film bearing, which will push up the equilibrium temperature of the oil film bearing.

[0116] After step S24, if the temperature has not been reduced yet, the method further includes steps S251 - S252.

[0117] Step S251, in a state where the operating temperature exceeds the preset warning temperature and reaches the preset ultra-high alarm temperature, reduce the rolling speed in the oil film bearing operation control system, so that the taper bushing fit of the target oil film bearing readapts until the roll of the oil film bearing operation control system is taken off the machine;

[0118] Step S252, during the process of taking the roll off the machine, control the coolant to flow in the target cooling pipeline at a first preset flow rate.

[0119] During the temperature regulation process of the oil film bearing, if the conventional heat dissipation measures fail to effectively reduce the temperature (step S24 does not achieve the expected effect), then an emergency cooling strategy needs to be started (steps S251 and S252). When the operating temperature of the target oil film bearing exceeds the preset warning temperature and reaches the preset ultra-high alarm temperature, step S251 reduces the rolling speed to reduce the generation of frictional heat, so that the fit clearance between the taper bushing and the journal readapts during dynamic operation, avoiding jamming or abnormal wear caused by thermal expansion at high temperature, until the roll is taken off the machine normally. During the process of taking the roll off the machine, step S252 controls the coolant to continue to flow in the target cooling pipeline at a first preset flow rate, quickly taking away the residual heat inside the bearing, preventing the temperature from rebounding due to thermal inertia after shutdown, and ensuring that the bearing temperature drops steadily to the safe range. These two measures work together, reducing the temperature rise pressure by reducing the speed during operation and eliminating the risk of residual heat by high-intensity cooling after shutdown, jointly ensuring the safety of the equipment and the production stability. Especially in extreme working conditions such as high temperature in summer or heavy-load rolling, it effectively avoids the melting of babbit alloy or equipment damage.

[0120] In summary, the embodiment of the present application provides a method for controlling the operation of a rolling mill oil film bearing, including: determining the target oil film oil flow rate of the target oil film bearing according to the production capacity requirements of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing; controlling the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate; monitoring the operating temperature of the target oil film bearing; in a state where the operating temperature reaches the preset warning temperature, controlling the actual oil film oil flow rate to exceed the target oil film oil flow rate, and controlling the coolant to flow in the target cooling pipeline at a first preset flow rate. It can be seen that the embodiment of the present application effectively reduces the temperature of the oil film bearing by dynamically regulating the coordinated cooperation of the oil film oil flow rate and the coolant flow rate, increasing the heat conduction capacity of the oil film bearing base, thereby reducing the risk of burnout caused by the melting of babbit alloy due to high temperature, prolonging the service life of the oil film bearing, reducing the optimization cost and the risk of unplanned shutdown, and ensuring the production continuity when the system needs to achieve a production capacity leap, having significant engineering practical value and economic benefits.

[0121] Based on the same inventive concept, the present application provides as Figure 3A running control device for a rolling mill oil film bearing, which is matched with an oil film bearing running control system. The oil film bearing running control system includes a target oil film bearing base and a target cooling pipeline connected to the target oil film bearing base. A target oil film bearing is arranged in the target oil film bearing base, and a coolant is contained in the target cooling pipeline. The device includes:

[0122] A target oil film oil flow rate determination module 31, configured to determine the target oil film oil flow rate of the target oil film bearing according to the production capacity requirement of the oil film bearing running control system and the designed oil film oil flow rate of the target oil film bearing;

[0123] An oil film bearing control module 32, configured to control the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate;

[0124] An operating temperature monitoring module 33, configured to monitor the operating temperature of the target oil film bearing;

[0125] A preset warning temperature control module 34, configured to control the actual oil film oil flow rate to exceed the target oil film oil flow rate and control the coolant to flow in the target cooling pipeline at a first preset flow rate when the operating temperature reaches the preset warning temperature.

[0126] Based on the same inventive concept, the present application provides an electronic device as shown in Figure 4 which includes:

[0127] A processor 41;

[0128] A memory 42 for storing executable instructions of the processor 41;

[0129] Wherein, the processor 41 is configured to execute to implement a running control method for a rolling mill oil film bearing as provided above.

[0130] Based on the same inventive concept, the present application provides a non-transitory computer-readable storage medium. When the instructions in the storage medium are executed by the processor 41 of the electronic device, the electronic device can execute to implement a running control method for a rolling mill oil film bearing as provided above.

[0131] Since the electronic device introduced in this embodiment is the electronic device adopted for implementing the information processing method in the embodiments of the present application, based on the information processing method introduced in the embodiments of the present application, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment. Therefore, the specific implementation of how this electronic device implements the method in the embodiments of the present application will not be described in detail here. As long as the electronic device adopted by those skilled in the art to implement the information processing method in the embodiments of the present application belongs to the scope protected by the present application.

[0132] Those skilled in the art will understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0133] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device generate means for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0134] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including instruction means that implement the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0135] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0136] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0137] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A rolling mill oil film bearing operation control method, characterized in that: Matching with an oil film bearing operation control system, the oil film bearing operation control system includes a target oil film bearing base and a target cooling pipeline connected to the target oil film bearing base, the target oil film bearing base is provided with a target oil film bearing, and the target cooling pipeline contains coolant, the method includes: Determining a target oil film oil flow rate of the target oil film bearing according to the capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing; Controlling the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate; monitoring the operating temperature of the target oil film bearing; When the operating temperature reaches the preset warning temperature, the actual oil film oil flow rate is controlled to exceed the target oil film oil flow rate, and the coolant is controlled to flow in the target cooling pipeline at a first preset flow rate.

2. The rolling mill oil film bearing operation control method according to claim 1, characterized in that: Determining the target oil film oil flow rate of the target oil film bearing according to the capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing comprises: Determining the oil film oil flow rate to be verified of the target oil film bearing according to the production capacity requirement and the designed oil film oil flow rate; In a case where the oil film fluid flow rate to be verified meets a preset verification relationship, the oil film fluid flow rate to be verified is determined as the target oil film fluid flow rate.

3. The rolling mill oil film bearing operation control method according to claim 1, characterized in that: The method further comprises: When the operating temperature meets the preset normal temperature, the coolant is controlled to flow in the target cooling pipeline at a second preset flow rate that is smaller than the first preset flow rate.

4. The rolling mill oil film bearing operation control method according to claim 1, characterized in that: The oil film bearing operation system comprises a plurality of monomer oil film bearing bases, each of which is provided with a monomer oil film bearing, and each of which is connected to at least one monomer cooling pipeline. Before determining the target oil film oil flow rate of the target oil film bearing according to the capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing, the method further comprises: Controlling the coolant in each of the monomer cooling lines to flow at a second preset flow rate; Monitoring the operating temperature of each of the oil film bearings; When the operating temperature of any of the monomers reaches the preset warning temperature, the monomer oil film bearing whose operating temperature reaches the preset warning temperature is determined as the target oil film bearing, and the target cooling pipeline corresponding to the target oil film bearing is determined.

5. The rolling mill oil film bearing operation control method according to claim 1, characterized in that: The method comprises: When the operating temperature exceeds the preset warning temperature and reaches the preset super-high alarm temperature, the rolling speed in the oil film bearing operation control system is reduced to make the tapered bushing of the target oil film bearing fit again adaptively until the roll of the oil film bearing operation control system is off the machine; During the process of the rolling mill roll being removed from the mill, the coolant is controlled to flow in the target cooling pipeline at the first preset flow rate.

6. The rolling mill oil film bearing operation control method according to claim 1, characterized in that: When the operating temperature reaches the preset warning temperature, controlling the actual oil film oil flow rate to exceed the target oil film oil flow rate, and controlling the coolant to flow in the cooling pipeline at a first preset flow rate, comprises: When the operating temperature reaches the preset warning temperature, controlling the actual oil film oil flow rate to exceed the target oil film oil flow rate; When the actual oil film oil flow rate increases to a preset upper limit value and the operating temperature still reaches the preset warning temperature, the coolant is controlled to flow in the target cooling pipeline at the first preset flow rate.

7. The rolling mill oil film bearing operation control method according to claim 1, characterized in that: The method for determining the first preset flow rate includes: Determining the aggregation temperature of the target oil film bearing according to the ambient temperature of the target oil film bearing, the preset equilibrium temperature and the thermal equilibrium relationship; The first preset flow rate is determined according to the gathering temperature and the thermal conductivity of the coolant.

8. A rolling mill oil film bearing operation control device, characterized in that: Matching with an oil film bearing operation control system, the oil film bearing operation control system includes a target oil film bearing base and a target cooling pipeline connected to the target oil film bearing base, the target oil film bearing base is provided with a target oil film bearing, the target cooling pipeline contains a coolant, and the device includes: A target oil film oil flow rate determination module is used to determine the target oil film oil flow rate of the target oil film bearing according to the capacity requirement of the oil film bearing operation control system and the designed oil film oil flow rate of the target oil film bearing; An oil film bearing control module, used for controlling the actual oil film oil flow rate of the target oil film bearing to reach the target oil film oil flow rate; An operating temperature monitoring module, used to monitor the operating temperature of the target oil film bearing; The preset warning temperature control module is used to control the actual oil film oil flow rate to exceed the target oil film oil flow rate when the operating temperature reaches the preset warning temperature, and control the coolant to flow in the target cooling pipeline at a first preset flow rate.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; Wherein, the processor is configured to execute to implement a rolling mill oil film bearing operation control method as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to implement a rolling mill oil film bearing operation control method as described in any one of claims 1 to 7.

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