Method, device and equipment for optimizing heat dissipation performance of covering part of engineering machine and medium

Abstract

The invention discloses a heat dissipation performance optimization method, device, equipment and medium for an engineering machinery covering part, and the method comprises the steps: S1, carrying out the preliminary design of the covering part according to the layout of a whole machine through employing a conventional design thought, enabling the preliminarily designed covering part to wholly wrap the whole machine in a range allowed by the layout, a heat dissipation hole or a heat dissipation maintenance window is arranged in the area where heat dissipation is estimated to be needed, and a conventional covering part is obtained; s2, using simulation software to establish a complete machine simulation model comprising the conventional covering part, performing heat dissipation simulation analysis, tapping the conventional covering part in a heat concentration area according to an analysis result, adjusting the conventional covering part simulation model, continuing to perform heat dissipation simulation analysis on the covering part, verifying whether tapping is appropriate or not, and after optimization iteration, performing heat dissipation simulation analysis on the covering part; and the optimized covering part is obtained. On the premise that waterproof and dustproof protection of the engineering machinery covering part is achieved as far as possible, the purposes of optimizing a flow field for a heat dissipation system of the whole machine and providing a reasonable heat dissipation air channel are achieved.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology for engineering machinery, and in particular, to methods, apparatus, equipment and media for optimizing the heat dissipation performance of engineering machinery body panels. Background Technology

[0002] Tunnel-type construction machinery typically operates in harsh environments with severe dust and moisture. Therefore, covers are necessary to protect internal components and provide access panels for internal structural adjustments and maintenance. In addition, heat generated by internal components such as the engine, air compressor, and motor pump unit dissipates into the covers, thus the covers also function as air ducts. The heat dissipation function of the covers is crucial; even with a sophisticated cooling system and excellent control programs, if the heat dissipated into the covers cannot be properly expelled, the entire machine will still experience frequent malfunctions.

[0003] Currently, thermal management is a crucial factor affecting the overall reliability of construction machinery. How to address the increasing heat dissipation demands, the higher precision requirements of thermal management, and the spatial arrangement of various heat sources have become important research directions in the industry. Related invention patents and utility models concerning thermal management of construction machinery primarily focus on improving and optimizing the structure of the radiator itself, or on coordinating the arrangement and interaction between multiple radiators within the entire equipment, as well as monitoring, controlling, and managing the heat dissipation system.

[0004] Furthermore, construction machinery is exposed to the harsh outdoor environment for extended periods, making it susceptible to corrosion from moisture, dust, and other contaminants. Additionally, the use of sprayed concrete further complicates cleaning, impacting the machine's surface and shortening its lifespan. To prevent corrosion of mechanical components, existing construction machinery is equipped with covers. These covers not only provide protection, dustproofing, and waterproofing, but also offer ventilation channels for the overall cooling system of the enclosed machine.

[0005] Construction machinery generates a large amount of heat during operation. No matter how reasonable or superior the structure and performance of the radiator itself, or how streamlined, intelligent, or efficient the entire cooling system is, if the generated heat cannot be dissipated through the covering, it will lead to a decrease in the reliability of the entire machine and an increase in the failure rate.

[0006] The current methods for achieving heat dissipation in cover components are mostly based on experience and analysis, which involves opening heat dissipation holes in areas close to heat source components. However, the size and location of these holes lack supporting evidence. In such cases, situations often arise where the solution is "overcorrected" or "far from satisfactory." That is, sometimes the location and size of the heat dissipation holes cannot meet the heat dissipation requirements, or too many heat dissipation holes are opened, causing dust and moisture to enter the cover component, which greatly reduces its protective effect and may even affect the overall waterproof performance.

[0007] Currently, there is no existing technology exploring how the cover can optimize the airflow and provide a reasonable heat dissipation channel for the whole machine's heat dissipation system while achieving waterproof and dustproof protection as much as possible. Summary of the Invention

[0008] This application provides a method for optimizing the heat dissipation performance of engineering machinery cover parts, solving the technical problem of how to optimize the flow field and provide a reasonable heat dissipation air duct for the whole machine heat dissipation system while ensuring waterproof and dustproof protection as much as possible for the cover parts that have not been treated in the prior art.

[0009] This application is achieved through the following solution: A method for optimizing the heat dissipation performance of engineering machinery body panels includes the following steps: S1. Based on the overall layout, the preliminary design of the cover is carried out using traditional design ideas. The preliminary design of the cover completely wraps the whole machine within the range allowed by the layout. Heat dissipation holes or heat dissipation maintenance windows are opened in the areas where heat dissipation is expected to be needed, resulting in a conventional cover. S2. Use simulation software to establish a whole-machine simulation model including the conventional cover, and perform heat dissipation simulation analysis. Based on the analysis results, make holes in the conventional cover in the heat concentration area. After adjusting the conventional cover simulation model, continue to perform heat dissipation simulation analysis of the cover to verify whether the holes are appropriate. After optimization and iteration, the optimized cover is obtained.

[0010] Furthermore, in step S1, the obtained conventional cover is a cover structure that tightly wraps all internal components, and has certain waterproof, dustproof and protective functions. The setting of heat dissipation holes follows the principle of opening holes in the cover near heat source components.

[0011] Furthermore, step S2 specifically includes the following steps: S21. Mesh the whole machine simulation model with conventional covering parts; S22. Model and boundary condition settings, wherein the model includes a physical model and a fluid model, and the boundary conditions include working condition boundary conditions, driving condition boundary conditions, and wall boundary conditions; S23. After obtaining a convergent solution under stable conditions through multiple iterations, based on the simulation results, including the temperature distribution diagram, heat flow diagram, wind speed and air volume values ​​of each heat dissipation port, and the corresponding judgment criteria, it is determined whether the conventional cover structure needs to be improved. If improvement is needed, the iteration is repeated until the optimized cover is finally obtained.

[0012] Furthermore, before meshing the whole-machine simulation model equipped with conventional covering parts in step S21, the following steps are also included: The geometry of the complete model with conventional covering parts was cleaned up and simplified. Without affecting the internal flow field and temperature field of the vehicle, the main structure of the trolley in contact with the outside air was retained, and the internal structure that is not in direct contact with the outside air was deleted. At the same time, issues such as broken surfaces, punctured surfaces and overlapping surfaces were cleaned up.

[0013] Furthermore, in step S21, the mesh generation of the whole-machine simulation model equipped with conventional covering parts specifically includes the following steps: A polyhedral mesh is used to divide the whole machine model into a mesh model. The mesh model is mainly divided into two regions: the fan rotation region and the stationary region. The mesh is subdivided for important parts and the mesh size is increased for other wall structures.

[0014] Further, step S22 specifically includes the following steps: S221. Set the heat flow process as steady-state turbulence, the air property as incompressible, ignore gravity and thermal radiation between solids, the rotating region as a multi-reference MRF model, and the wall surface as no slip; at the same time, set the air flow and temperature values ​​of the air compressor radiator fan inlet and outlet; the boundary condition of the heat source component wall is a temperature boundary, and the value is set to the temperature value measured on site, and the temperature of the non-heat source component wall is set to the ambient temperature.

[0015] Furthermore, step S23 specifically includes the following steps: S231. Using fluid simulation software, a turbulence model, a decoupled solver and the Simple algorithm are used to perform the solution calculation. After multiple iterations, when the residual iteration meets the set requirements and the temperature, flow rate or velocity curve of the monitoring surface reaches stability, the simulation calculation is stopped and the monitoring results are output to obtain the convergent solution under stable conditions. S232. Based on the monitoring results, analyze whether the temperature distribution of the research object meets the requirements and adjust the heat dissipation vents of the conventional cover. When opening heat dissipation vents has little effect on improving the internal space temperature or there are still high temperature areas, add partitions or guide plates to guide the heat out. After repeated iterations, the final optimized cover is obtained. S233. Based on the thermal flow diagram of the conventional cover in the monitoring results, repeatedly change the height of the cover and iteratively calculate the optimal value of the cover height so that the gap between the cover and each component is optimal. S234. The heat dissipation vents are divided into near heat dissipation vents near the heat source and far heat dissipation vents far from the heat source. Initially, the heat dissipation vents are arranged according to the heat flow diagram of the conventional cover in the monitoring results. Subsequently, the opening area of ​​the near heat dissipation vent is judged by the values ​​of the wind speed and air volume of each heat dissipation vent to determine whether the opening area of ​​the near heat dissipation vent is appropriate and whether the arrangement of the far heat dissipation vent is reasonable. If, within the range allowed by the structure, changing the opening area of ​​the heat dissipation vent does not increase the air volume and the wind speed change is lower than the set value, then the opening area of ​​the heat dissipation vent is reasonable. If the wind speed of the far heat dissipation vent is less than a certain standard value, then the far heat dissipation vent is directly cancelled.

[0016] This application also provides a device for optimizing the heat dissipation performance of engineering machinery body panels, including: The preliminary design module for the cover is used to perform preliminary design of the cover based on the overall layout and using traditional design ideas. The preliminary design of the cover completely wraps the whole machine within the range allowed by the layout. Heat dissipation holes or heat dissipation maintenance windows are opened in the areas where heat dissipation is expected to be needed, resulting in a conventional cover. The cover optimization module is used to establish a whole-machine simulation model including the conventional cover using simulation software, and to perform heat dissipation simulation analysis. Based on the analysis results, holes are made in the conventional cover in the heat concentration area. After adjusting the conventional cover simulation model, heat dissipation simulation analysis of the cover is continued to verify whether the hole is appropriate. After optimization iteration, the optimized cover is obtained.

[0017] This application also provides an electronic device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method for optimizing the heat dissipation performance of the engineering machinery cover.

[0018] This application also provides a computer-readable storage medium storing a computer program thereon, characterized in that the computer program, when executed by a processor, implements the method for optimizing the heat dissipation performance of the engineering machinery cover.

[0019] Compared with the prior art, this application has the following advantages: This application derives an approximate full-coverage component based on the overall machine layout. Simulation software is used to perform heat dissipation simulation analysis on the entire machine, obtaining the internal flow field distribution, temperature distribution, and flow velocity and flow rate at the heat dissipation vents. Based on these results, heat dissipation openings are made in the cover component, resulting in a further optimized model. This optimized model is then subjected to the same thermal simulation analysis, and this iterative process is repeated until a cover component that meets the overall machine's heat dissipation requirements while maximizing its protective, waterproof, and dustproof functions is obtained. This achieves the goal of optimizing the flow field and providing a reasonable heat dissipation channel for the overall machine's heat dissipation system while ensuring maximum waterproof and dustproof protection.

[0020] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a flowchart illustrating a preferred embodiment of the method for optimizing the heat dissipation performance of engineering machinery body panels. Figure 2 (a) is a schematic diagram of the temperature distribution of the electrical control cabinet in a conventional scheme; Figure 2 (b) is a schematic diagram of the temperature distribution on the windward side of the left electrical control cabinet in the conventional scheme; Figure 3 (a) is a schematic diagram of the optimized temperature distribution of the electrical control cabinet according to a preferred embodiment of this patent; Figure 3 (b) is a schematic diagram of the optimized temperature distribution on the windward side of the left-side electrical control cabinet according to the preferred embodiment of this patent; Figure 4 This is a schematic diagram of the heat flow lines for a conventional solution; Figure 5 (a) is a schematic diagram of the local heat flow lines on the right side of the optimized electrical control cabinet according to a preferred embodiment of this patent; Figure 5 (b) is a schematic diagram of the optimized heat flow line of the electrical control cabinet according to a preferred embodiment of this patent; Figure 6 This is a schematic diagram of the installation position of the guide plate according to a preferred embodiment of this application; Figure 7 This is a schematic diagram of the guide vane installation position according to another preferred embodiment of this application; Figure 8 This is a schematic diagram of a module for optimizing the heat dissipation performance of a construction machinery cover according to a preferred embodiment of this application; Figure 9 This is a schematic block diagram of an electronic device according to a preferred embodiment of this application; Figure 10 This is an internal structural diagram of a computer device according to a preferred embodiment of this application. Detailed Implementation

[0023] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0024] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or a heat dissipation performance optimization device for engineering machinery cover parts capable of achieving the above functions. The following description uses a heat dissipation performance optimization device for engineering machinery cover parts as an example to illustrate this embodiment and the subsequent embodiments.

[0025] like Figure 1 As shown, a preferred embodiment of this application provides a method for optimizing the heat dissipation performance of engineering machinery cover parts, including the following steps: S1. Based on the overall layout, the preliminary design of the cover is carried out using traditional design ideas. The preliminary design of the cover completely wraps the whole machine within the range allowed by the layout. Heat dissipation holes or heat dissipation maintenance windows are opened in the areas where heat dissipation is expected to be needed, and a conventional cover (initial calculation model) is obtained. S2. Use simulation software to establish a whole-machine simulation model including the conventional cover, and perform heat dissipation simulation analysis. Based on the analysis results, make holes in the conventional cover in the heat concentration area. After adjusting the conventional cover simulation model, continue to perform heat dissipation simulation analysis of the cover to verify whether the holes are appropriate. After optimization and iteration, the optimized cover is obtained.

[0026] The heat dissipation process of construction machinery mainly refers to the process by which various heat source components generate a large amount of heat, which is then dissipated through radiators into the housing enclosed by the cover, and then dissipated into the external environment through the air ducts organized by the cover. Currently, the industry focuses on how to improve the heat dissipation efficiency of the radiators of heat source components, often neglecting the process of heat dissipation to the outside environment through the air ducts organized by the cover.

[0027] Due to the harsh working environment of construction machinery, in order to extend the life of various components, construction machinery often needs to be equipped with covers to form a certain compartment to protect the internal structure. Covers are generally divided into open and semi-open types, with almost no fully enclosed covers. This is because a full enclosure would prevent heat dissipation, making it impossible for the entire machine to operate normally. However, fully enclosed covers also have significant advantages in the harsh environment of construction machinery, with their dust removal and rockfall prevention functions being far superior to open and semi-open covers.

[0028] The current heat dissipation design of engineering machinery body panels mostly involves opening heat dissipation holes near the heat source components. However, no one has studied where to open heat dissipation holes for the entire body panel and how large the opening area should be to meet the heat dissipation requirements of the whole machine.

[0029] Too many ventilation holes will make the internal structure prone to dust and dirt accumulation, and will result in poor waterproofing and impact resistance. Too few ventilation holes will lead to poor overall heat dissipation, causing frequent malfunctions and preventing the machine from operating normally.

[0030] Therefore, this embodiment proposes a reasonable solution to balance the relationship between heat dissipation and protection in cover components, providing a method for optimizing the heat dissipation performance of engineering machinery cover components. This method derives an approximately fully enclosed cover component based on the overall machine layout, uses simulation software to perform heat dissipation simulation analysis on the entire machine, obtaining the internal flow field distribution, temperature distribution, and flow velocity and flow rate at the heat dissipation vents. Based on these results, heat dissipation openings are added to the cover component, resulting in a further optimization model. This optimization model is then subjected to the same thermal simulation analysis, iterating until a cover component that meets the overall machine's heat dissipation requirements while maximizing its protective, waterproof, and dustproof functions is obtained. This achieves the goal of optimizing the flow field and providing a reasonable heat dissipation channel for the overall machine's heat dissipation system while ensuring maximum waterproof and dustproof protection. Finally, a simple comparison of the use of machines equipped with conventional and optimized cover components on a construction site verifies the correctness of the above method.

[0031] Preferably, in step S1, the obtained conventional cover is a cover structure that tightly wraps all internal components and has certain waterproof, dustproof and protective functions. The setting of heat dissipation holes follows the principle of opening holes in the cover near heat source components.

[0032] Based on the overall layout and conventional design concepts, this embodiment completes a basic cover structure that tightly encloses (waterproof, dustproof, and protective) all internal components as a conventional cover (initial calculation model). The overall heat dissipation hole settings all follow the principle of opening the cover near the heat source components, thus obtaining the optimization basis and starting point.

[0033] Preferably, step S2 specifically includes the following steps: S21. Mesh the whole machine simulation model with conventional covering parts; S22. Model and boundary condition settings, wherein the model includes a physical model and a fluid model, and the boundary conditions include working condition boundary conditions, driving condition boundary conditions, and wall boundary conditions; S23. After obtaining a convergent solution under stable conditions through multiple iterations, based on the simulation results, including the temperature distribution diagram, heat flow diagram, wind speed and air volume values ​​of each heat dissipation port, and the corresponding judgment criteria, it is determined whether the conventional cover structure needs to be improved. If improvement is needed, the iteration is repeated until the optimized cover is finally obtained.

[0034] This embodiment utilizes simulation software to perform mesh generation, model and boundary condition setting, and heat dissipation simulation analysis on the entire machine, obtaining the internal flow field distribution, temperature distribution, and air velocity and air volume values ​​of the heat dissipation vents. Based on the above results, relevant judgment methods, and processing measures, heat dissipation openings are made in the cover to obtain a further optimized model. The above thermal simulation analysis is then repeated on the optimized model. This process is iterated until a cover that meets the heat dissipation requirements of the entire machine while maximizing the protective, waterproof, and dustproof functions of the cover is finally obtained.

[0035] Preferably, in step S21, before meshing the whole-machine simulation model equipped with conventional covering parts, the following step is also included: The geometry of the complete model with conventional covering parts was cleaned up and simplified. Without affecting the internal flow field and temperature field of the vehicle, the main structure of the trolley in contact with the outside air was retained, and the internal structure that is not in direct contact with the outside air was deleted. At the same time, issues such as broken surfaces, punctured surfaces and overlapping surfaces were cleaned up.

[0036] Before processing the simulation model, this embodiment first requires reasonable geometric cleanup and simplification of the overall machine model equipped with conventional covering parts. Without affecting the internal flow and temperature fields of the vehicle, the main structure of the trolley in contact with the external air is retained, while internal structures not in direct contact with the external air are deleted. At the same time, issues such as broken surfaces, puncture surfaces, and overlapping surfaces are cleaned up. The engine retains the outer surface of the unit, large-sized water pipes, and the engine intercooler and water-cooler. Heat-generating components such as the motor pump unit, air compressor, exhaust pipe, and after-processor are retained, thus simplifying the model and reducing the computational load and cost while improving computational efficiency without affecting the accuracy and reliability of the simulation results.

[0037] Preferably, step S21, which involves meshing the whole-machine simulation model equipped with conventional covering parts, specifically includes the following steps: A polyhedral mesh is used to divide the whole machine model into a mesh model. The mesh model is mainly divided into two regions: the fan rotation region and the stationary region. The mesh is subdivided for important parts and the mesh size is increased for other wall structures.

[0038] In this embodiment, a polyhedral mesh is used to divide the simplified model above. The mesh model is mainly divided into two regions: the fan rotation region and the stationary region. In order to control the overall network accuracy and quantity, the mesh is subdivided for important parts and the mesh size is increased for other wall structures. For example, the basic mesh size is 20 mm and the minimum mesh size is 1 mm. Five mesh boundary layers are set, and the engine, fan and other components are locally densified. The number of meshes is 42 million.

[0039] Preferably, step S22 specifically includes the following steps: S221. Set the heat flow process as steady-state turbulence, the air property as incompressible, ignore gravity and thermal radiation between solids, the rotating region as a multi-reference MRF model, and the wall surface as no slip; at the same time, set the air flow and temperature values ​​of the air compressor radiator fan inlet and outlet; the boundary condition of the heat source component wall is a temperature boundary, and the value is set to the temperature value measured on site, and the temperature of the non-heat source component wall is set to the ambient temperature.

[0040] In this embodiment, the heat flow process is assumed to be steady-state turbulence, air is assumed to be incompressible, gravity and thermal radiation between solids are ignored, the rotating region is modeled using a multi-reference frame MRF model, and the wall surface is set to no slip. The airflow and temperature values ​​at the inlet and outlet of the air compressor radiator fan are also set. The boundary conditions of the heat source component wall are temperature boundaries, set to the actual temperature values ​​measured on-site, while the temperature of the non-heat source component wall is set to the ambient temperature. Then, using fluid simulation software, a turbulence model, a decoupled solver, and the Simple algorithm are used for calculation. After multiple iterations, a convergent solution under steady-state conditions is obtained (physical model, fluid model, working condition boundary conditions, driving condition boundary conditions, and wall boundary).

[0041] Preferably, step S23 specifically includes the following steps: S231. Using fluid simulation software, a turbulence model, a decoupled solver and the Simple algorithm are used to perform the solution calculation. After multiple iterations, when the residual iteration meets the set requirements and the temperature, flow rate or velocity curve of the monitoring surface reaches stability, the simulation calculation is stopped and the monitoring results are output to obtain the convergent solution under stable conditions. S232. Based on the monitoring results, analyze whether the temperature distribution of the research object meets the requirements. Adjust the heat dissipation vents of the conventional cover. When opening heat dissipation vents has little effect on improving the internal temperature or high-temperature areas still exist, add baffles or guide plates to guide heat out. After repeated iterations, the final optimized cover is obtained. When the whole machine is in operation, internal heat source components such as the engine, air compressor, motor pump set, and heat-sensitive components such as the electrical control cabinet can all be used as research objects to analyze whether the temperature distribution meets the requirements. For example, the electrical control cabinet is used as the research object for result analysis. In this case, the heat emitted by the air compressor radiator blows towards the back of the left electrical control cabinet. The temperature distribution diagram of the electrical control cabinet is calculated for the whole machine with the conventional cover, as shown below. Figure 2 (a) and Figure 2As shown in (b), most of the electrical control cabinet area is in a high-temperature zone (90℃). A grille ventilation window was added to the access door on this side (hexagonal ventilation holes are not used here to ensure waterproofing of the control cabinet; the grille ventilation mesh can ensure both heat dissipation and waterproofing). After further analysis and calculation, a slight improvement was found, but a high-temperature zone still exists at the back. Therefore, a partition needs to be added to isolate the heat source and guide heat dissipation. After repeated calculations, the final optimized cover was obtained, and its temperature distribution diagram for the electrical control cabinet is shown below. Figure 3 (a) and Figure 3 As shown in (b), the high-temperature zone has basically disappeared. The highest temperature has decreased to 76.6℃, and the average temperature has decreased by about 20℃. The temperature of the electrical control cabinet on the right side has not changed much. When a heat dissipation vent is opened near a heat source, it has little effect on improving the internal temperature, or a high-temperature zone still exists. In such cases, it is necessary to add a partition or a heat deflector to guide the heat out. S233. Based on the heat flow diagram of the conventional cover in the monitoring results, the height of the cover was repeatedly changed, and the optimal value of the cover height was calculated iteratively to make the gap between the cover and each component optimal. The degree to which the cover wraps around the whole machine also affects the heat dissipation of the whole machine. If the cover is too short, it will hinder the heat dissipation. However, the cover is not better the higher it is. If the gap between the cover and each component is too large, vortices will be formed locally, and the heat flow will rotate inside the cover and cannot be discharged. Therefore, based on the heat flow diagram, the height of the cover was repeatedly changed, and the optimal value was calculated iteratively.

[0042] like Figure 4 The thermal flow diagram for a standard cover shows a maximum temperature of 89.9°C, indicating that most of the heat is dissipated from the bottom of the unit. Figure 5 (a) and Figure 5 (b) After the improvement, most of the heat from the optimized cover is dissipated through the heat dissipation window of the electrical control cabinet inspection door grille, with a maximum value of 76.6°C. The heat dissipation volume accounts for 61.2% of the air volume of the air compressor cooling fan. S234. The heat dissipation vents are divided into near-heat source vents and far-heat source vents. Initially, the vents are arranged according to the heat flow diagram of the conventional cover in the monitoring results. Subsequently, the opening area of ​​the near-heat source vents and the arrangement of the far-heat source vents are judged by the values ​​of wind speed and air volume of each vent. If, within the range allowed by the structure, changing the opening area of ​​the vent does not increase the air volume and the wind speed change is lower than the set value, then the opening area of ​​the vent is reasonable. If the wind speed of the far-heat source vent is less than a certain standard value (the designer can choose the standard value according to the overall operating conditions and cover structure), then the far-heat source vent is directly cancelled. It is recommended to judge the wind speed of the far-heat source vent according to the wind force level standard of China Meteorological Administration. If it is less than a soft wind, it is directly cancelled.

[0043] In summary, based on the simulation results, the temperature distribution diagram, heat flow diagram, wind speed and air volume of each heat dissipation vent, combined with the above judgment criteria, processing technology, structural strength, economic cost, etc., are used to determine whether structural improvement is needed. If improvement is needed, the process is repeated iteratively until the optimal solution is finally obtained.

[0044] The following experiences were summarized during the process of using this method to perform heat dissipation simulation analysis on most devices: 1. The gas inside the equipment carries the heat emitted by the heat source and moves to the top of the equipment. Therefore, a sufficient distance must be reserved between the cover and the heat source to facilitate air circulation and remove the heat. However, it should not be too high. When the space is too large, the heat flow will bounce back when it encounters an obstacle and form a vortex inside the cover, which is not easy to conduct away.

[0045] 2. In addition to ensuring their own heat dissipation, each component should also consider the mutual influence between components. That is, components that are sensitive to ambient temperature should be protected when located on heat dissipation channels, such as by diverting heat away or by installing protective covers. However, it is necessary to ensure that the heat dissipation channels are unobstructed as much as possible and that components that are not resistant to high temperatures are not placed there.

[0046] 3. When the heat source is far from the cover and there is a need for heat dissipation, a deflector should be installed. The size of the deflector should cover the protected component as much as possible, and it should be as close as possible to the heat dissipation window. When the above requirements cannot be met, the heat outlet of the deflector should be located within the internal area of ​​the heat dissipation window as possible. Figure 6 In the first method shown, if the heat dissipation window is directly facing the heat flow channel without leaving half of the area, the diffused heat flow will be reflected back into the cover (see...). Figure 7 ).

[0047] 4. Electrical control cabinets generally do not have ventilation windows, but they are subject to high requirements for their own ambient temperature. If there are heat sources nearby, ventilation windows should be installed.

[0048] 5. Motor pump sets have low heat dissipation requirements; generally, a small heat dissipation vent is needed at the cooling fan to ensure airflow.

[0049] 6. The overall layout of the machine should disperse heat sources as much as possible.

[0050] According to on-site feedback, the standard heat dissipation design of the cover unit, based on conventional heat dissipation principles, resulted in several air compressor malfunctions and even a complete machine malfunction caused by the electrical control cabinet within just one month of its installation. After these issues occurred, on-site investigation revealed that heat dissipated from the air compressor was trapped inside the electrical control cabinet, preventing timely dissipation and causing overheating problems in the control cabinet, engine, and air compressor. On-site service personnel could only work by opening all access doors. The engine, air compressor, torque converter radiator, and motor pump unit are all reliable components, functioning well and exhibiting excellent heat dissipation in other equipment. Why then did these frequent malfunctions occur in this machine? The answer is obvious: it wasn't due to inefficient cooling systems or improper heat dissipation organization, but rather the inability to properly dissipate heat into the cover unit's cavity, thus raising the ambient temperature and causing equipment failure. On-site measurements showed the temperature near the electrical control cabinet to be approximately 70℃-80℃, exceeding the maximum allowable ambient temperature for the control cabinet (50℃-60℃).

[0051] After analysis and calculation, the optimized cover was tested on the construction site for more than a month. The optimized cover was still operating well on the construction site and no related faults occurred. The ambient temperature near the electrical control cabinet was measured to be about 50℃-60℃.

[0052] like Figure 8 As shown, another preferred embodiment of this application also provides a device for optimizing the heat dissipation performance of engineering machinery cover parts, including: The preliminary design module for the cover is used to perform a preliminary design of the cover based on the overall layout and using traditional design ideas. The preliminary design of the cover completely wraps the whole machine within the range allowed by the layout. Heat dissipation holes or heat dissipation maintenance windows are opened in the areas where heat dissipation is expected to be needed, resulting in a conventional cover. The cover optimization module is used to establish a whole-machine simulation model including the conventional cover using simulation software, and to perform heat dissipation simulation analysis. Based on the analysis results, holes are made in the conventional cover in the heat concentration area. After adjusting the conventional cover simulation model, heat dissipation simulation analysis of the cover is continued to verify whether the holes are appropriate. After optimization iteration, the optimized cover is obtained.

[0053] The engineering machinery cover heat dissipation performance optimization device provided in this embodiment adopts the engineering machinery cover heat dissipation performance optimization method in the above embodiment. It solves the technical problem of how to optimize the flow field and provide a reasonable heat dissipation air duct for the whole machine heat dissipation system while ensuring waterproof and dustproof protection as much as possible. Compared with the prior art, the beneficial effects of the engineering machinery cover heat dissipation performance optimization device provided in this embodiment are the same as the beneficial effects of the engineering machinery cover heat dissipation performance optimization method provided in the above embodiment. Moreover, other technical features in the engineering machinery cover heat dissipation performance optimization device are the same as the features disclosed in the method of the above embodiment, and will not be repeated here.

[0054] like Figure 9 As shown, a preferred embodiment of this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method for optimizing the heat dissipation performance of engineering machinery cover parts in the above embodiment.

[0055] This embodiment provides an electronic device that employs the heat dissipation performance optimization method for engineering machinery cover parts in the above embodiments. It solves the technical problem in the prior art of how to optimize the flow field and provide a reasonable heat dissipation channel for the whole machine's heat dissipation system while ensuring waterproof and dustproof protection as much as possible. Compared with the prior art, the beneficial effects of the electronic device provided in this embodiment are the same as those of the heat dissipation performance optimization method for engineering machinery cover parts provided in the above embodiments. Furthermore, other technical features of the electronic device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0056] like Figure 10 As shown in the preferred embodiment, this embodiment also provides a computer device, which may be a terminal or a liveness detection server, and its internal structure diagram may be as follows. Figure 10 As shown. The computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface is used to communicate with other external computer devices via a network connection. When the computer program is executed by the processor, it implements the steps of the aforementioned method for optimizing the heat dissipation performance of engineering machinery body panels.

[0057] Those skilled in the art will understand that Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the solution of this embodiment, and does not constitute a limitation on the computer device to which the solution of this embodiment is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0058] The computer equipment provided in this application adopts the heat dissipation performance optimization method for engineering machinery cover parts in the above embodiments, which solves the technical problem of how to optimize the flow field and provide a reasonable heat dissipation channel for the whole machine heat dissipation system while ensuring waterproof and dustproof protection as much as possible. Compared with the prior art, the beneficial effects of the computer equipment provided in this embodiment are the same as the beneficial effects of the heat dissipation performance optimization method for engineering machinery cover parts provided in the above embodiments, and other technical features in the electronic equipment are the same as the features disclosed in the method of the above embodiments, which will not be repeated here.

[0059] A preferred embodiment of this example also provides a storage medium, which includes a stored program that, when the program is executed, controls the device containing the storage medium to perform the steps of the method for optimizing the heat dissipation performance of engineering machinery cover parts in the above embodiment.

[0060] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0061] If the functions described in this embodiment are implemented as software functional units and sold or used as independent products, they can be stored in one or more computing device-readable storage media. Based on this understanding, the parts of this embodiment that contribute to the prior art or the technical solution can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this embodiment. The aforementioned storage media include: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0062] Those skilled in the art will understand that the embodiments of this example can be provided as methods, systems, or computer program products. Therefore, this example can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this example 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.) containing computer-usable program code. The solutions in this example can be implemented using various computer languages, such as the object-oriented programming language C++ and the embedded programming language C.

[0063] This embodiment is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this embodiment. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0064] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0065] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0066] This embodiment also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method for optimizing the heat dissipation performance of engineering machinery cover parts.

[0067] The computer program product provided in this embodiment solves the technical problem of how to optimize the airflow field and provide a reasonable heat dissipation channel for the overall heat dissipation system while ensuring waterproof and dustproof protection as much as possible for the cover parts, which is not addressed in the prior art. Compared with the prior art, the beneficial effects of the computer program product provided in this embodiment are the same as the beneficial effects of the heat dissipation performance optimization method for engineering machinery cover parts provided in the above embodiments, and will not be repeated here.

[0068] Obviously, those skilled in the art can make various modifications and variations to this embodiment without departing from the spirit and scope of this embodiment. Therefore, if these modifications and variations of this embodiment fall within the scope of the claims of this embodiment and their equivalents, this embodiment is also intended to include these modifications and variations.

Claims

1. A method for optimizing the heat dissipation performance of engineering machinery body panels, characterized in that, Including the following steps: S1. Based on the overall layout, the preliminary design of the cover is carried out using traditional design ideas. The preliminary design of the cover completely wraps the whole machine within the range allowed by the layout. Heat dissipation holes or heat dissipation maintenance windows are opened in the areas where heat dissipation is expected to be needed, resulting in a conventional cover. S2. Use simulation software to establish a whole-machine simulation model including the conventional cover, and perform heat dissipation simulation analysis. Based on the analysis results, make holes in the conventional cover in the heat concentration area. After adjusting the conventional cover simulation model, continue to perform heat dissipation simulation analysis of the cover to verify whether the holes are appropriate. After optimization and iteration, the optimized cover is obtained.

2. The method for optimizing the heat dissipation performance of engineering machinery cover parts according to claim 1, characterized in that, In step S1, the resulting conventional cover is a cover structure that tightly wraps all internal components and has certain waterproof, dustproof and protective functions. The heat dissipation holes are set according to the principle of opening the cover near the heat source components.

3. The method for optimizing the heat dissipation performance of engineering machinery cover parts according to claim 1, characterized in that, Step S2 specifically includes the following steps: S21. Mesh the whole machine simulation model with conventional covering parts; S22. Model and boundary condition settings, wherein the model includes a physical model and a fluid model, and the boundary conditions include working condition boundary conditions, driving condition boundary conditions, and wall boundary conditions; S23. After obtaining a convergent solution under stable conditions through multiple iterations, based on the simulation results, including the temperature distribution diagram, heat flow diagram, wind speed and air volume values ​​of each heat dissipation port, and the corresponding judgment criteria, it is determined whether the conventional cover structure needs to be improved. If improvement is needed, the iteration is repeated until the optimized cover is finally obtained.

4. The method for optimizing the heat dissipation performance of engineering machinery cover parts according to claim 3, characterized in that, In step S21, before meshing the whole-machine simulation model equipped with conventional covering parts, the following steps are also included: The geometry of the complete model with conventional covering parts was cleaned up and simplified. Without affecting the internal flow field and temperature field of the vehicle, the main structure of the trolley in contact with the outside air was retained, and the internal structure that is not in direct contact with the outside air was deleted. At the same time, issues such as broken surfaces, punctured surfaces and overlapping surfaces were cleaned up.

5. The method for optimizing the heat dissipation performance of engineering machinery cover parts according to claim 3 or 4, characterized in that, In step S21, the mesh generation of the whole machine simulation model equipped with conventional covering parts specifically includes the following steps: A polyhedral mesh is used to divide the whole machine model into a mesh model. The mesh model is mainly divided into two regions: the fan rotation region and the stationary region. The mesh is subdivided for important parts and the mesh size is increased for other wall structures.

6. The method for optimizing the heat dissipation performance of engineering machinery cover parts according to claim 3, characterized in that, Step S22 specifically includes the following steps: S221. Set the heat flow process as steady-state turbulence, the air property as incompressible, ignore gravity and thermal radiation between solids, the rotating region as a multi-reference MRF model, and the wall surface as no slip; at the same time, set the air flow rate and temperature values ​​of the air compressor radiator fan inlet and outlet. The boundary condition for the wall surface of the heat source component is a temperature boundary, and the value is set to the actual temperature measured on site. The temperature of the wall surface of the non-heat source component is set to the ambient temperature.

7. The method for optimizing the heat dissipation performance of engineering machinery cover parts according to claim 3, characterized in that, Step S23 specifically includes the following steps: S231. Using fluid simulation software, a turbulence model, a decoupled solver and the Simple algorithm are used to perform the solution calculation. After multiple iterations, when the residual iteration meets the set requirements and the temperature, flow rate or velocity curve of the monitoring surface reaches stability, the simulation calculation is stopped and the monitoring results are output to obtain the convergent solution under stable conditions. S232. Based on the monitoring results, analyze whether the temperature distribution of the research object meets the requirements and adjust the heat dissipation vents of the conventional cover. When opening heat dissipation vents has little effect on improving the internal space temperature or there are still high temperature areas, add partitions or guide plates to guide the heat out. After repeated iterations, the final optimized cover is obtained. S233. Based on the thermal flow diagram of the conventional cover in the monitoring results, repeatedly change the height of the cover and iteratively calculate the optimal value of the cover height so that the gap between the cover and each component is optimal. S234. The heat dissipation vents are divided into near heat dissipation vents near the heat source and far heat dissipation vents far from the heat source. Initially, the heat dissipation vents are arranged according to the heat flow diagram of the conventional cover in the monitoring results. Subsequently, the opening area of ​​the near heat dissipation vent is judged by the values ​​of the wind speed and air volume of each heat dissipation vent to determine whether the opening area of ​​the near heat dissipation vent is appropriate and whether the arrangement of the far heat dissipation vent is reasonable. If, within the range allowed by the structure, changing the opening area of ​​the heat dissipation vent does not increase the air volume and the wind speed change is lower than the set value, then the opening area of ​​the heat dissipation vent is reasonable. If the wind speed of the far heat dissipation vent is less than a certain standard value, then the far heat dissipation vent is directly cancelled.

8. A device for optimizing the heat dissipation performance of engineering machinery body panels, characterized in that, include: The preliminary design module for the cover is used to perform preliminary design of the cover based on the overall layout and using traditional design ideas. The preliminary design of the cover completely wraps the whole machine within the range allowed by the layout. Heat dissipation holes or heat dissipation maintenance windows are opened in the areas where heat dissipation is expected to be needed, resulting in a conventional cover. The cover optimization module is used to establish a whole-machine simulation model including the conventional cover using simulation software, and to perform heat dissipation simulation analysis. Based on the analysis results, holes are made in the conventional cover in the heat concentration area. After adjusting the conventional cover simulation model, heat dissipation simulation analysis of the cover is continued to verify whether the hole is appropriate. After optimization iteration, the optimized cover is obtained.

9. An electronic device, the electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, it implements the method for optimizing the heat dissipation performance of engineering machinery cover parts as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for optimizing the heat dissipation performance of engineering machinery cover parts as described in any one of claims 1 to 7.

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