A method for solving the jumping phenomenon of the rotary roller of a continuous casting machine

Abstract

This disclosure relates to the field of metallurgical continuous casting technology and provides a method for solving the problem of swivel runout in continuous casting machines. The method includes: adding multiple cement columns below the swivel runout beam of the target continuous casting machine to form rigid support for the beam; installing support wheels on the top of each cement column, so that the swivel runout beam rests on the support wheels, and forming a flexible buffer for the beam through rolling contact between the support wheels and the beam; adjusting the height of the support wheels until the levelness of the swivel runout beam meets preset requirements; and establishing and implementing a periodic lubrication and sealing protection process for each support wheel. This embodiment, through the combination of rigid support and flexible buffering, and the coordinated implementation of levelness adjustment and periodic maintenance, achieves a comprehensive and effective solution to the swivel runout problem in continuous casting machines, providing a strong guarantee for the stable operation of metallurgical continuous casting production.

Description

Technical Field

[0001] This disclosure relates to the field of metallurgical continuous casting technology, and more specifically, to a method for solving the problem of runout in the rotary roller table of a continuous casting machine. Background Technology

[0002] In the continuous casting production process of steel, the rotary roller conveyor of the continuous casting machine is the core conveying equipment connecting casting and subsequent hot conveying or rolling processes. Its operating status directly determines the flow efficiency of high-temperature billets and the continuity of the production line. Under the harsh working conditions of long-term exposure to high temperature, heavy load and intermittent impact, the stability of its core load-bearing structure - the rotary roller conveyor beam - faces severe challenges.

[0003] In actual production, due to process factors such as burrs on the surface of the cast billet and head deformation that are difficult to completely eliminate, the main beam is often subjected to non-uniform instantaneous impacts during the conveying process, which can easily induce structural vibration. This vibration not only causes the cast billet to deviate and scratch its surface during conveying, affecting product quality, but also triggers a series of vicious chain reactions such as frequent loosening of equipment foundation bolts and fatigue fracture of key connecting parts, posing serious safety hazards and forcing unplanned shutdowns of the production line, resulting in significant economic losses. Therefore, a solution that can ensure the long-term stable operation of the main beam of the continuous casting machine's rotary roller conveyor is urgently needed to address the structural vibration problem. Summary of the Invention

[0004] This disclosure provides at least one method for solving the problem of slewing roller runout in continuous casting machines. By combining rigid support with flexible buffering, and implementing leveling adjustment and periodic maintenance in a coordinated manner, the method achieves comprehensive and effective management of the slewing roller runout problem in continuous casting machines, providing a strong guarantee for the stable operation of metallurgical continuous casting production.

[0005] This disclosure provides a method for solving the runout phenomenon of the rotary roller conveyor in a continuous casting machine, including: Multiple cement columns are added below the rotary roller conveyor beam of the target continuous casting machine to form a rigid support for the rotary roller conveyor beam. Support wheels are installed on the top of each of the concrete pillars, so that the rotary roller conveyor beam is supported on multiple support wheels. The rolling contact between the support wheels and the rotary roller conveyor beam forms a flexible buffer for the rotary roller conveyor beam. Adjust the height of the multiple support wheels until the levelness of the rotary roller conveyor beam meets the preset requirements; Establish and perform periodic lubrication and sealing protection procedures for each of the aforementioned support wheels.

[0006] In some possible embodiments, the addition of multiple cement columns below the rotary roller conveyor beam of the target continuous casting machine includes: Based on the stress distribution of the rotary roller conveyor beam, the placement positions of multiple cement columns are determined. Excavation and reinforcement are carried out at the designated location, and concrete is poured into the excavated and reinforced location to form the cement column.

[0007] In some possible embodiments, the installation of support wheels on the top of each of the concrete pillars includes: Select support wheels made of alloy steel; The support wheel is mounted on the mounting base at the top of the cement column via a bearing; Adjust the position of the support wheel so that the first part of the support wheel contacts the lower surface of the rotary roller conveyor beam, and the second part of the support wheel contacts the mounting base through the bearing.

[0008] In some possible embodiments, adjusting the height of the plurality of support wheels includes: Measure the current levelness data of the rotary roller conveyor beam; Based on the levelness data, calculate the height adjustment amount and adjustment direction corresponding to each support wheel; For each support wheel, the rotating roller conveyor beam or the mounting seat of the support wheel that is in contact with the support wheel is subjected to multiple minor adjustments according to the height adjustment amount and adjustment direction; After each minor adjustment of each support wheel, the levelness data of the rotary roller conveyor beam is remeasured until the levelness data of the rotary roller conveyor beam meets the preset requirements.

[0009] In some possible embodiments, adjusting the height of the plurality of support wheels includes: The target continuous casting machine was subjected to no-load and load test runs. During the trial operation, the vibration data of the rotary roller conveyor beam and the operating status of each support wheel were monitored. Based on the monitoring results, the height and / or levelness of each support wheel are adjusted slightly.

[0010] In some possible embodiments, the micro-adjustment refers to a single adjustment of no more than 0.1 mm.

[0011] In some possible embodiments, the step of installing the support wheel on top of each of the concrete pillars includes: The bearings inside each support wheel are cleaned and their performance is tested, including: cleaning the bearings inside each support wheel using ultrasonic cleaning equipment, and testing the radial clearance and surface roughness of the bearings inside each support wheel.

[0012] In some possible embodiments, the process of establishing and performing periodic lubrication and sealing protection on the support wheel includes: Determine the high-temperature grease for each of the aforementioned support wheels; Based on the ambient temperature, humidity and operating frequency of each support wheel, determine the lubrication cycle and single oil injection amount of each support wheel; Lubricate each of the support rollers periodically according to the lubrication cycle and single oil injection amount. Each of the aforementioned support wheels is equipped with a stainless steel protective cover; The stainless steel protective cover is installed on the outside of the support wheel, so that a labyrinth-like sealing structure is formed between the protective cover and the rotating parts of the support wheel.

[0013] In some possible embodiments, the stainless steel protective cover is made of 304 stainless steel.

[0014] In some possible embodiments, after establishing and performing the periodic lubrication and sealing protection process on the support wheel, the process includes: Regularly inspect the foundation condition of the cement column, the wear of the support wheels, the effectiveness of the lubrication, and the integrity of the sealing and protective structure; Based on the inspection results, preventative maintenance or replacement should be performed on the height of the support wheel, as well as the lubrication or sealing components.

[0015] The method for solving the runout phenomenon of the rotary roller conveyor in continuous casting machines provided in this embodiment effectively suppresses the vibration and runout of the rotary roller conveyor beam by combining rigid support with flexible buffering, and coordinating the implementation of leveling adjustment and periodic maintenance. This ensures the smooth operation and leveling accuracy of the roller conveyor, extends the service life of the equipment, and improves the working efficiency and reliability of the continuous casting machine. It achieves a comprehensive and effective solution to the runout problem of the rotary roller conveyor in continuous casting machines, and provides a strong guarantee for the stable operation of metallurgical continuous casting production.

[0016] To make the above-mentioned objects, features and advantages of this disclosure more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings referenced in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this disclosure and, together with the specification, serve to explain the technical solutions of this disclosure. It should be understood that the following drawings only show some embodiments of this disclosure and should not be considered as limiting the scope. Those skilled in the art can obtain other related drawings based on these drawings without creative effort.

[0018] Figure 1 A flowchart is shown below illustrating a method for solving the problem of swivel runout in a continuous casting machine, provided by an embodiment of this disclosure. Figure 2 A schematic diagram of a continuous casting machine rotary roller support structure provided in an embodiment of this disclosure is shown; Figure 3 A flowchart of a method for adjusting the height of a support wheel provided in an embodiment of this disclosure is shown; Figure 4 A flowchart of a periodic inspection and maintenance method provided by an embodiment of this disclosure is shown. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In this document, the term "and / or" merely describes a relationship, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0022] The following is a detailed description, with reference to the accompanying drawings, of a method for solving the runout phenomenon of the rotary roller conveyor in a continuous casting machine, provided by an embodiment of this application. See also... Figure 1 The diagram shows a flowchart of a method for solving the runout phenomenon of the rotary roller conveyor in a continuous casting machine according to an embodiment of this disclosure. The method includes the following steps S101 to S104: S101, Multiple cement columns are added below the rotary roller conveyor beam of the target continuous casting machine to form a rigid support for the rotary roller conveyor beam.

[0023] Understandably, the target continuous casting machine refers to a specific continuous casting machine that requires the implementation of this method to solve its roller table runout problem, such as the No. 7 continuous casting machine that produces large square billets, or a continuous casting machine that produces other cross-sectional specifications (such as slabs and small square billets) and has similar roller table runout problems. The rotary roller table is a mobile transport device located after the cutting section of the continuous casting machine, responsible for receiving and laterally conveying high-temperature cast billets. The rotary roller table beam refers to the main load-bearing steel structure frame in this roller table system, used to install and support all rotating rollers.

[0024] Specifically, because the load borne by the rotary roller conveyor beam when conveying heavy high-temperature cast billets far exceeds its original design, causing structural deformation and vibration, this disclosure proposes to install additional support points in the critical impact area below the rotary roller conveyor beam to form auxiliary rigid support for the beam. Here, rigid support refers to using a concrete column, a structure with high compressive strength and stability, to directly transfer part of the load borne by the beam to the foundation, preventing the beam from undergoing elastic or plastic deformation due to insufficient load-bearing capacity.

[0025] For example, when adding a cement column below the main beam of the rotary roller conveyor to form a rigid support, the following steps (1) to (2) may be included: (1) Determine the placement of multiple cement columns based on the stress distribution of the rotary roller conveyor beam; (2) Excavate and reinforce the location where the column is to be laid, and pour concrete into the excavated and reinforced location to form the cement column.

[0026] Here, load analysis can be performed on the rotary roller conveyor beam based on mechanical analysis or on-site vibration monitoring data to determine the area with the largest vibration amplitude or stress concentration, which is the preferred location for the cement column. Then, the foundation at the selected location is excavated to deepen and expand the foundation area to enhance stability. A steel cage is placed in the pit, and concrete is poured. After it is fully cured, a solid cement column structure is formed.

[0027] In some possible embodiments, C40 concrete (with a standard cubic compressive strength of 40 MPa) or higher strength grade concrete can be selected for pouring to achieve higher early strength and long-term durability, ensuring that the cement column can maintain structural integrity for a long time under the heavy load conditions of continuous vibration, high temperature radiation and certain chemical corrosion unique to steel plant areas, and meet the functional requirements as a permanent rigid support.

[0028] In some possible embodiments, the proposed scheme of adding cement columns is illustrated using the rotary roller conveyor of the No. 7 large billet continuous casting machine as an example. Its design and construction employ specific and quantifiable parameters: the main body of the column is made of C40 strength grade concrete, with a standard compressive strength of 40 MPa; the foundation is specifically reinforced, with the bottom area expanded to 1.5 times the original foundation area and deepened by 0.8 meters, thereby significantly enhancing the compressive and overturning stability of the foundation. In terms of layout, the spacing between multiple cement columns is optimized to 2.5 meters. This value, verified by mechanical simulation, can improve the uniformity of stress on the rotary roller conveyor beam by approximately 40%, specifically reducing the standard deviation of the beam's stress from ±35 kN to ±21 kN. Regarding the improvement in load-bearing capacity, the added cement columns share the load. Let the total pressure on the beam be F, and the proportion of load sharing by the cement columns be k. Then, the pressure borne by the columns is F1 = k × F, and the pressure borne by the original structure is F2 = (1-k) × F. Actual operation monitoring data shows that the load-bearing ratio (k) can reach 40%. For example, when facing a pressure peak of 350kN, the concrete column bears approximately 140kN, while the original structure bears approximately 210kN, thereby increasing the total load-bearing capacity of the system from the original 180kN to 500kN, an increase of approximately 2.78 times. The final implementation results show that this design eliminates structural deformation of the main beam caused by insufficient load-bearing capacity, and the foundation settlement of the concrete column itself is strictly controlled within 0.5 mm / year, exceeding the general specification requirement of no more than 1 mm / year.

[0029] S102, a support wheel is installed on the top of each of the cement columns, so that the rotary roller conveyor beam is supported on the multiple support wheels, and a flexible buffer is formed on the rotary roller conveyor beam through the rolling contact between the support wheels and the rotary roller conveyor beam.

[0030] Specifically, after adding multiple concrete columns below the rotary roller conveyor beam, in order to introduce a movable interface that can effectively absorb and isolate impact loads on the basis of rigid support, support wheels can be fixedly installed at the top of each concrete column. This allows the rotary roller conveyor beam to bear the load on multiple support wheels, forming a rolling support contact relationship. Here, a support wheel refers to a cylindrical steel component equipped with bearings inside, which can rotate freely around its axis, converting the relative motion between the beam and the support structure from sliding friction to rolling friction.

[0031] In some possible embodiments, a support wheel made of alloy steel can be selected. The support wheel is mounted on a mounting base on top of the concrete column via a bearing. The bearing is the core mechanical component for achieving low-friction rotation and can include an inner ring, an outer ring, rolling elements, and a cage. The alloy steel can be selected from materials with high strength and good wear resistance, such as 42CrMo or 40Cr. The specific material can be selected according to the load requirements and working conditions, and is not specifically limited here.

[0032] Understandably, to ensure smooth rotation of the support wheel for cushioning and stable vertical support, after mounting the support wheel on the top of the concrete column via bearings, its position can be adjusted so that the first part of the support wheel contacts the lower surface of the rotary roller conveyor beam, and the second part contacts the mounting base via the bearing. Here, the first part refers to the top area (upper edge) of the outer circumference of the support wheel cylinder, which directly bears the beam; the second part refers to the inner ring of the bearing, fixed to the axle of the support wheel, and is the core load-bearing component during the rotation of the entire wheel. Thus, through this structure, the load from the beam can be transferred through the upper edge of the support wheel, conducted through the rolling elements inside the bearing, and finally dispersed to the concrete column by the outer ring of the bearing and the mounting base. During this process, the impact energy is partially dissipated by the rolling motion of the bearing, thereby achieving flexible cushioning.

[0033] For example, refer to Figure 2 The diagram shown is a schematic of a continuous casting machine rotary roller support structure proposed in this disclosure. Figure 2 The diagram shows five concrete columns, labeled c1, c2, c3, c4, and c5, positioned beneath the main beam A of the rotary roller conveyor. These columns form the core structure providing auxiliary rigid support for beam A. At the top of each column, a support wheel is mounted, as shown in the diagram as b1, b2, b3, b4, and b5. These support wheels are mounted on mounting bases fixed to the top of the columns via internal bearings. The lower surface of the rotary roller conveyor beam directly contacts and bears the load of these support wheels at their upper edges (i.e., the top area of ​​the cylindrical outer circumference). The diagram illustrates the support relationship between the concrete columns, support wheels, and main beam: the concrete columns provide stable rigid support, transferring the load to the foundation; the support wheels, as rotatable components between the concrete columns and the main beam, form a rolling contact with the beam (the possible rolling directions are indicated by arrows), allowing the rotation of the support wheels to partially absorb and isolate the impacts and vibrations experienced by the beam, thus providing flexible buffering.

[0034] In some possible embodiments, taking the rotary roller conveyor of the No. 7 large billet continuous casting machine as an example, the parameters of the support roller can be set as follows: diameter 300 mm, width 150 mm, rated load capacity 60 kN, material 42CrMo alloy steel, and surface hardness Rockwell hardness HRC35 to 40. Simulation experiments and quantitative analysis of the vibration attenuation effect show that vibration acceleration is the core indicator for measuring the degree of vibration. By calculating the percentage of the difference in vibration acceleration before and after the improvement relative to the vibration acceleration before the improvement, the vibration attenuation rate can be obtained. Data shows that the peak vibration acceleration before the improvement was 12 m² / s, which decreased to 4 m² / s after the improvement, and the calculated vibration attenuation rate was approximately 66.7%. Its working principle lies in the fact that the support roller, with its extremely low rolling friction coefficient (usually between 0.01 and 0.02), is far lower than the original sliding friction coefficient (usually between 0.3 and 0.5), thereby significantly reducing the impact force transmission efficiency and reducing the uneven local stress on the main beam by more than 90%.

[0035] For example, since the bearings inside the support wheels are core precision components that determine their rotational flexibility and cushioning performance, their initial cleanliness and mechanical condition directly affect the long-term operational reliability and lifespan of the support wheels. Therefore, before installing the support wheels onto the mounting base at the top of the concrete column, the bearings inside each support wheel can be cleaned and their performance tested. This pretreatment process may include: using ultrasonic cleaning equipment to clean the bearings inside each support wheel to thoroughly remove contaminants such as rust-preventive oil, dust, and metal shavings that have adhered during processing, storage, and handling; and testing the radial clearance and surface roughness of the bearings inside each support wheel to ensure that their dimensional accuracy and surface quality meet the requirements of heavy-load, frequent start-stop conditions. Among them, ultrasonic cleaning equipment refers to a device that uses high-frequency sound waves to generate cavitation effect in the cleaning fluid to impact and peel off the adhering substances on the surface of the parts. Water-based or solvent-based cleaning agents can be used; performance testing aims to verify whether the key physical parameters of the bearing meet the assembly standards; the radial clearance of the bearing is expressed as the total amount of radially movable clearance between the inner and outer rings of the bearing, which can be measured by measuring tools such as dial indicators, and mainly affects the smoothness of bearing operation and load-bearing capacity; surface roughness refers to the quantitative index of the microscopic unevenness of the bearing raceway and rolling element surface, which can be measured with the help of a profilometer. Lower roughness helps to form a stable lubricating oil film and reduce friction and wear.

[0036] In some other embodiments, performance testing of the bearings in each support wheel may also include testing their rotational flexibility, performing hardness testing or material spectral analysis, etc., to ensure that the material properties meet the requirements of high-temperature and heavy-load environments. Specific testing items can be determined according to actual quality control standards, and are not specifically limited here.

[0037] S103, adjust the height of the multiple support wheels until the levelness of the rotary roller conveyor beam meets the preset requirements.

[0038] It is understandable that after the initial installation of the support wheels is completed, due to slight differences in the construction elevation of each cement column and the manufacturing tolerance of the support wheels themselves, the rotary roller conveyor beam may not be in an ideal horizontal state when supported by multiple support wheels. Therefore, the height of multiple support wheels can be systematically adjusted until the overall levelness of the rotary roller conveyor beam meets the preset requirements.

[0039] Specifically, refer to Figure 3 As shown, the following steps S301~S304 may be included when adjusting the height of the support wheel: S301, Measure the current levelness data of the rotary roller conveyor beam.

[0040] Here, multiple representative measuring points on the upper surface of the rotary roller conveyor beam can be selected using high-precision level instruments (such as those with a measurement error ≤0.05mm / m) or electronic levels to obtain the height difference between each measuring point and the reference horizontal plane.

[0041] S302, based on the levelness data, calculate the height adjustment amount and adjustment direction corresponding to each of the support wheels.

[0042] Specifically, after obtaining the height data of each measuring point, the current tilt or undulation state of the main beam can be determined through calculation and analysis. Based on the data deviation of the measuring points corresponding to the positions of each support wheel, the required height adjustment amount for each support wheel to restore the main beam to a horizontal state can be calculated. Here, the height adjustment amount refers to the specific value by which the support wheel needs to be raised or lowered, and the adjustment direction indicates whether it needs to be raised or lowered. For example, if the measuring point of the main beam corresponding to a certain support wheel is too low, then that support wheel needs to be raised, and the adjustment amount is the difference between the height of that measuring point and the target height.

[0043] S303, for each support wheel, the rotary roller conveyor beam or the mounting seat of the support wheel that is in contact with the support wheel is subjected to multiple minor adjustments to the support wheel according to the height adjustment amount and adjustment direction.

[0044] Understandably, after calculating the adjustment parameters of each support wheel, jacks, lifting screws, or special adjustment tools can be used to adjust the support height of the support wheel relative to the top of the concrete column by applying pressure to the bottom of the rotary roller conveyor beam or the adjustment points on the support wheel mounting base. Here, the adjustment process requires precise control; a minor adjustment means that the magnitude of a single adjustment should not exceed 0.1 mm, to avoid over-adjustment that could cause new internal stress or structural instability.

[0045] S304. After each minor adjustment of each support wheel, the levelness data of the rotary roller conveyor beam is remeasured until the levelness data of the rotary roller conveyor beam meets the preset requirements.

[0046] Specifically, after completing a round of minor adjustments to all support wheels, the measurement process in step S301 needs to be repeated to determine the actual effect of the adjustment, until the latest measured levelness data (such as maximum height difference and flatness error) stabilizes within the preset threshold requirements. This indicates that the support wheels have worked together to support the beam to the required level state. Here, the preset requirements can be specifically set according to the equipment installation accuracy standards or the stability requirements under specific working conditions. For example, the levelness error over the entire length of the beam may not exceed ±0.5 mm, but this is not specifically limited here.

[0047] Furthermore, to verify the final effect of the height adjustment and ensure its stability under dynamic load, after completing the static leveling adjustment, the target continuous casting machine supported by each support roller can be subjected to no-load and load test runs to simulate actual working conditions. No-load refers to the equipment's self-operation when no billet is being conveyed, while load refers to the operating state when normally conveying high-temperature billets. During the test run, the vibration data of the rotary roller conveyor beam and the operating status of each support roller can be monitored in real time. The operating status is reflected in whether the support rollers rotate smoothly, whether there are abnormal noises, and whether the temperature rise is normal, which can be monitored using vibration sensors, acoustic detection, and infrared thermography. Finally, based on the monitoring results, if new signs of vibration or uneven stress appear under load, the height and / or level of each support roller can be adjusted slightly based on the operating data. In this way, through this closed-loop process of "static adjustment - dynamic verification - dynamic fine-tuning," it can be ensured that the support roller system is not only level under static conditions but also maintains excellent stability and buffering effect under the dynamic load of actual production.

[0048] S104, establish and perform a periodic lubrication and sealing protection process for each of the support wheels.

[0049] Specifically, after the support wheels are installed and their height adjusted, in order to ensure the long-term flexibility and reliability of the rotating components of the support wheels and maintain their buffering function, a periodic lubrication and sealing protection process can be established and implemented for each support wheel. Lubrication involves injecting specialized lubricating grease into the bearings inside the support wheels to form an oil film on the rolling contact surfaces, reducing friction and wear. Sealing protection refers to installing physical protective covers on the support wheels and designing sealing structures to prevent contaminants such as dust, moisture, and high-temperature iron oxide scale from the external environment from entering the bearing interior.

[0050] For example, to achieve systematic maintenance of the support wheel, the following steps (a) to (e) may be included: (a) Determine the high-temperature grease for each of the aforementioned support wheels; (b) Determine the lubrication cycle and single oil injection amount of each support wheel based on the ambient temperature, humidity and operating frequency of each support wheel; (c) Lubricate each of the support rollers periodically according to the lubrication cycle and single oil injection amount of each support roller; (d) Each of the aforementioned support wheels is equipped with a stainless steel protective cover; (e) The stainless steel protective cover is installed on the outside of the support wheel, so that a labyrinth seal structure is formed between the protective cover and the rotating part of the support wheel.

[0051] Understandably, given the high ambient temperature in the continuous casting area, a high-temperature grease with a dropping point significantly higher than the ambient temperature can be selected for the support wheel, such as a special grease with a dropping point of not less than 280 degrees Celsius. When determining lubrication parameters, the optimal lubrication cycle and single-use oil volume can be determined through calculation and experimental verification based on the volume of the support wheel bearing cavity, the average temperature and humidity of the area, and the estimated number of rotations per unit time. For example, under operating conditions of an ambient temperature of 50 to 80 degrees Celsius, humidity of 60% to 70%, and an average daily rotation of approximately 120 times, the lubrication cycle can be set to once a day, with a single-use oil volume of approximately 120 grams per wheel.

[0052] For example, when calculating and experimentally verifying the lubrication cycle and single-fill amount for each support wheel, the following steps can be included: First, based on the theoretically calculated volume of the support wheel bearing and the initial grease filling rate, a basic single-fill amount can be set; then, on a test bench simulating actual working conditions, using a selected high-temperature resistant grease, the support wheel under this grease amount undergoes a bench test for lubrication durability at different cycles (e.g., every 8 hours, every 24 hours, every 48 hours). During the test, the bearing's operating temperature, vibration value, and rotational torque are continuously monitored, and samples are periodically taken to analyze the grease's decay state (e.g., consistency changes, oxidation level, and contamination). Simultaneously, at the actual installation site, representative support wheels can be selected for comparative industrial tests of different lubrication cycles, monitoring their wear rate, vibration attenuation effects, and failure rate. By combining laboratory bench data and field industrial test results, the correlation between grease performance degradation and operating time, ambient temperature and humidity, and rotational frequency can be analyzed, thereby determining an optimal lubrication cycle that effectively maintains lubrication performance while avoiding over-maintenance. Finally, based on the grease consumption and replenishment requirements under this optimal cycle, the rationality of the single oil injection amount can be deduced and verified, and the quantified and verified lubrication parameters that match the specific working conditions can be determined, namely the lubrication cycle and the single oil injection amount.

[0053] Here, when setting the lubrication cycle and single oil injection volume, the matching between actual working conditions and test data can be considered. If the daily oil injection volume is too high, it will lead to excessive grease inside the bearing or between friction pairs. The excess grease cannot be effectively utilized and will instead form additional "oil film resistance" during rotation. This not only increases the energy consumption of the equipment, but may also cause the local temperature to rise due to the work done by the resistance being converted into heat, which will accelerate the oxidation and deterioration of the lubricant in the long term. At the same time, excessive grease may overflow from the bearing gaps and seals, adsorbing dust and moisture in the environment (especially at 60-70% humidity), forming sludge or contaminants. These impurities will further aggravate wear and may damage the integrity of the sealing structure, making it easier for external contaminants to enter. Conversely, if the amount of lubricant injected is too low or the lubrication frequency is insufficient, the oil film formed by the lubricant on the friction surface cannot be replenished in time. The oil film thickness is insufficient or it breaks, causing direct contact between the metal surfaces, resulting in dry friction or boundary friction. This will significantly increase the wear rate, potentially leading to monthly wear exceeding 0.01 mm, and long-term problems such as excessive bearing clearance and increased vibration and noise. In high humidity environments of 60-70%, if the lubricant is insufficient, its rust-preventive protection is weakened, and the metal surface is exposed to the humid environment for a longer period of time, which may lead to rust. Rust products (such as iron oxide) will further aggravate wear, forming a vicious cycle of "wear-rust".

[0054] Furthermore, based on the calculated lubrication cycle and oil volume, the support wheel can be lubricated regularly and in a standardized manner to ensure that the lubricant inside the bearing is always in an effective state.

[0055] Meanwhile, to create a long-lasting physical barrier, protective covers can be installed on each support wheel. These stainless steel covers effectively resist high-temperature radiation and corrosion from humid atmospheres, achieving long-term stable protection. The labyrinthine sealing structure refers to the use of multiple layers of meandering gap channels between the protective cover and the support wheel shaft, making it difficult for contaminants to enter along a straight path. Sealing is primarily achieved through throttling and barrier effects.

[0056] In some possible embodiments, the stainless steel protective cover can be made of 304 stainless steel, which has good corrosion resistance and a certain degree of heat resistance, and can adapt to the environmental requirements of the continuous casting roller conveyor area.

[0057] In some possible embodiments, since the support wheel system is in a continuous dynamic process, in order to ensure its long-term performance stability and reliability, a periodic inspection and maintenance procedure can be established based on periodic lubrication and sealing protection, referring to... Figure 4 As shown, the process includes the following steps S401~S402: S401, periodically inspect the foundation condition of the cement column, the wear condition of the support wheels, the effectiveness of lubrication, and the integrity of the sealing and protective structure.

[0058] Understandably, as part of preventative maintenance, regular downtime inspections and systematic assessments of critical components can be scheduled. Here, the foundation condition of the concrete pillars refers to the presence of cracks, settlement, or tilting, which can be assessed through a combination of visual inspection and precise measurement. The effectiveness of lubrication is initially judged by checking the color, viscosity, and presence of impurities in the grease. Simultaneously, the integrity of the protective cover's fixing bolts and sealing lips should be checked while inspecting the bearings to determine if the sealing structure remains effective.

[0059] S402, Based on the inspection results, perform preventative maintenance or replacement on the height of the support wheel, lubrication, or sealing components.

[0060] Furthermore, after obtaining the system's inspection and evaluation results, the height of the support wheel can be adjusted by fine-tuning the shims under the support wheel, or aged and failed seals and depleted grease can be replaced preventively, thereby intervening before problems occur and ensuring the continuous, stable, and reliable operation of the entire support and buffer system.

[0061] The method for solving the runout phenomenon of the rotary roller conveyor in continuous casting machines provided in this embodiment effectively suppresses the vibration and runout of the rotary roller conveyor beam by combining rigid support with flexible buffering, and coordinating the implementation of leveling adjustment and periodic maintenance. This ensures the smooth operation and leveling accuracy of the roller conveyor, extends the service life of the equipment, and improves the working efficiency and reliability of the continuous casting machine. It achieves a comprehensive and effective solution to the runout problem of the rotary roller conveyor in continuous casting machines, and provides a strong guarantee for the stable operation of metallurgical continuous casting production.

[0062] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0063] Finally, it should be noted that the above-described embodiments are merely specific implementations of this disclosure, used to illustrate the technical solutions of this disclosure, and not to limit it. The protection scope of this disclosure is not limited thereto. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this disclosure. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure, and should all be covered within the protection scope of this disclosure. Therefore, the protection scope of this disclosure should be determined by the protection scope of the claims.

Claims

1. A method for solving the problem of runout on the rotary roller conveyor of a continuous casting machine, characterized in that, include: Multiple cement columns are added below the rotary roller conveyor beam of the target continuous casting machine to form a rigid support for the rotary roller conveyor beam. Support wheels are installed on the top of each of the concrete pillars, so that the rotary roller conveyor beam is supported on multiple support wheels. The rolling contact between the support wheels and the rotary roller conveyor beam forms a flexible buffer for the rotary roller conveyor beam. Adjust the height of the multiple support wheels until the levelness of the rotary roller conveyor beam meets the preset requirements; Establish and perform periodic lubrication and sealing protection procedures for each of the aforementioned support wheels.

2. The method according to claim 1, characterized in that, The addition of multiple cement columns below the rotary roller conveyor beam of the target continuous casting machine includes: Based on the stress distribution of the rotary roller conveyor beam, the placement positions of multiple cement columns are determined. Excavation and reinforcement are carried out at the designated location, and concrete is poured into the excavated and reinforced location to form the cement column.

3. The method according to claim 1, characterized in that, The installation of support wheels on the top of each of the concrete pillars includes: Select support wheels made of alloy steel; The support wheel is mounted on the mounting base at the top of the cement column via a bearing; Adjust the position of the support wheel so that the first part of the support wheel contacts the lower surface of the rotary roller conveyor beam, and the second part of the support wheel contacts the mounting base through the bearing.

4. The method according to claim 1, characterized in that, The adjustment of the height of the plurality of support wheels includes: Measure the current levelness data of the rotary roller conveyor beam; Based on the levelness data, calculate the height adjustment amount and adjustment direction corresponding to each support wheel; For each support wheel, the rotating roller conveyor beam or the mounting seat of the support wheel that is in contact with the support wheel is subjected to multiple minor adjustments according to the height adjustment amount and adjustment direction; After each minor adjustment of each support wheel, the levelness data of the rotary roller conveyor beam is remeasured until the levelness data of the rotary roller conveyor beam meets the preset requirements.

5. The method according to claim 4, characterized in that, After adjusting the height of the plurality of support wheels, the following is included: The target continuous casting machine was subjected to no-load and load test runs. During the trial operation, the vibration data of the rotary roller conveyor beam and the operating status of each support wheel were monitored. Based on the monitoring results, the height and / or levelness of each support wheel are adjusted slightly.

6. The method according to claim 5, characterized in that, The term "micro-adjustment" refers to a single adjustment with an amplitude not exceeding 0.1 mm.

7. The method according to claim 1, characterized in that, Before installing the support wheels on the top of each of the concrete pillars, the process includes: The bearings inside each support wheel are cleaned and their performance is tested, including: cleaning the bearings inside each support wheel using ultrasonic cleaning equipment, and testing the radial clearance and surface roughness of the bearings inside each support wheel.

8. The method according to claim 7, characterized in that, The process of establishing and performing periodic lubrication and sealing protection on the support wheel includes: Determine the high-temperature resistant grease for each of the aforementioned support wheels; Based on the ambient temperature, humidity and operating frequency of each support wheel, determine the lubrication cycle and single oil injection amount of each support wheel; Lubricate each of the support rollers periodically according to the lubrication cycle and single oil injection amount. Each of the aforementioned support wheels is equipped with a stainless steel protective cover; The stainless steel protective cover is installed on the outside of the support wheel, so that a labyrinth-like sealing structure is formed between the protective cover and the rotating part of the support wheel.

9. The method according to claim 8, characterized in that, The stainless steel protective cover is made of 304 stainless steel.

10. The method according to any one of claims 1 to 9, characterized in that, After establishing and performing a periodic lubrication and sealing protection process on the support wheel, the process includes: Regularly inspect the foundation condition of the cement column, the wear of the support wheels, the effectiveness of the lubrication, and the integrity of the sealing and protective structure; Based on the inspection results, preventative maintenance or replacement should be performed on the height of the support wheel, as well as the lubrication or sealing components.

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