Mechanical evaluation method and manufacturing method of ventilation equipment and ventilation system and device

Abstract

The invention discloses a mechanical evaluation method and manufacturing method of ventilation equipment, and a ventilation system and device. The evaluation method comprises the following steps: S1, acquiring initial structure parameters of the ventilation equipment; the ventilation equipment comprises an outer frame and fan blades which are arranged in the outer frame and are adjustable in angle; s2, in a finite element model of the ventilation equipment, preset loads corresponding to the initial structure parameters are applied to the outer frame and the fan blades so as to determine stress values of the fan blades; and S3, according to the stress values of the fan blades and the corresponding allowable values, whether the ventilation equipment meets the mechanical property requirement or not is judged. According to the method, the target structure parameters of the ventilation equipment meeting the mechanical property requirements can be quickly and directly determined, the mechanical evaluation efficiency of the ventilation equipment is improved, and the operation effect of a ventilation system is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of ventilation equipment, and in particular relates to a mechanical evaluation method, a manufacturing method, a ventilation system and a device for ventilation equipment. Background Art

[0002] For ventilation equipment, such as vents and shutters, the ventilation effect can be improved by controlling the gas flow. By evaluating the mechanics of ventilation equipment, the performance of ventilation equipment under various possible loads can be evaluated to ensure the operation effect of the ventilation system. The mechanics of ventilation equipment can be evaluated by creating a finite element model using beam elements or shell elements, then applying various loads, and finally submitting it to finite element analysis software for calculation.

[0003] However, in the prior art, the mechanical evaluation process of ventilation equipment is completed manually by mechanical analysts, which has low work efficiency and feasible ventilation equipment cannot be evaluated in one go, which further increases the working hours of mechanical analysts, reduces the mechanical evaluation efficiency of ventilation equipment, and affects the operation effect of the ventilation system. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a mechanical evaluation method, a manufacturing method, a ventilation system and a device for ventilation equipment in view of the above-mentioned deficiencies in the prior art. By using this method, the mechanical evaluation efficiency of the ventilation equipment can be improved and the operation effect of the ventilation system can be ensured.

[0005] In a first aspect, the present invention provides a method for mechanical evaluation of a ventilation device, comprising:

[0006] S1. Obtaining initial structural parameters of the ventilation device; the ventilation device includes an outer frame and a fan blade disposed in the outer frame and having an adjustable angle;

[0007] S2. In the finite element model of the ventilation device, a preset load corresponding to the initial structural parameters is applied to the outer frame and the fan blades to determine the force value of the fan blades;

[0008] S3. Determine whether the ventilation equipment meets the mechanical performance requirements based on the force value of the fan blade and the corresponding allowable value.

[0009] In some embodiments,

[0010] The preset load includes the full constraint load applied on the outer frame, the deadweight load of the outer frame, the line load applied on each blade, and the deadweight load of the blade. Step S2 specifically includes:

[0011] S21. Obtain the linear load applied to each blade and the deadweight load of the blade, and obtain the full constraint load applied to the outer frame and the deadweight load of the outer frame;

[0012] S22. In the finite element model of the ventilation equipment, a full constraint load and a deadweight load of the outer frame are applied to the outer frame, and a line load and a deadweight load of the blade are applied to each blade.

[0013] In some embodiments, in step S21, obtaining the linear load applied to each blade specifically includes:

[0014] S211. Obtain the pressure load perpendicular to the outer frame;

[0015] S212. According to the pressure load, determine the linear load applied to each blade, which specifically includes:

[0016] According to the following formula (1), determine the linear load FN applied to each blade:

[0017] FN=P*Z*COS(AN*3.14 / 180) / NUM / 10 6 (1)

[0018] Where FN is the linear load applied to each blade (N / mm), P is the pressure load (Pa), Z is the height of the outer frame (mm), AN is the blade opening angle (°), and NUM is the number of blade layers.

[0019] In some embodiments, the force values ​​of the fan blades include maximum tensile stress, maximum shear stress and maximum bending stress, and step S22 specifically includes:

[0020] By applying full constraint load to the external frame and linear load and gravity acceleration to each blade, the maximum tensile stress, maximum shear stress and maximum bending stress of the blade are determined.

[0021] In some embodiments, step S3 specifically includes:

[0022] S31. According to the force value of the fan blade and the corresponding allowable value, determine whether the ventilation equipment meets the mechanical performance requirements;

[0023] S32. When it is determined that the mechanical performance requirements are met, the initial structural parameters are determined as target structural parameters of the ventilation device that meets the mechanical performance requirements;

[0024] S33. When it is determined that the mechanical performance requirements are not met, the initial structural parameters of the ventilation equipment are optimized to determine the target structural parameters of the ventilation equipment that meet the mechanical performance requirements.

[0025] In some embodiments, the optimizing the structural parameters of the ventilation equipment specifically includes:

[0026] S331. Adjust the initial structural parameters of the fan blades, and repeat steps S1 to S31 until the target structural parameters of the ventilation device that meet the mechanical performance requirements are determined;

[0027] The initial structural parameters of the fan blades include the thickness of the fan blades, the number of fan blade layers, and the opening angle of the fan blades.

[0028] In a second aspect, the present invention further provides a method for manufacturing a ventilation device, comprising:

[0029] Determine the target structural parameters of the ventilation equipment that meets the mechanical performance requirements according to any of the above evaluation methods;

[0030] The ventilation equipment is manufactured according to the determined target structural parameters.

[0031] In a third aspect, the present invention further provides a ventilation system, comprising:

[0032] A ventilation device formed by the above-mentioned manufacturing method;

[0033] A ventilation duct is connected to the ventilation device and is used to receive the gas passing through the ventilation device.

[0034] In a fourth aspect, the present invention further provides a mechanical evaluation device for ventilation equipment, the device comprising:

[0035] An acquisition module is configured to acquire initial structural parameters of a ventilation device; the ventilation device comprises an outer frame and a fan blade disposed in the outer frame and having an adjustable angle;

[0036] A loading module connected to the acquisition module, which is configured to apply a preset load corresponding to the initial structural parameters to the outer frame and the fan blades in a finite element model of the ventilation device to determine a force value of the fan blades;

[0037] The judgment module is connected to the loading module and is configured to judge whether the ventilation device meets the mechanical performance requirements based on the force value of the fan blade and the corresponding allowable value.

[0038] In some embodiments, the determination module includes:

[0039] A judgment unit, configured to judge whether the ventilation device meets the mechanical performance requirements according to the force value of the fan blade and the corresponding allowable value;

[0040] A first processing unit is connected to the judgment unit and is configured to determine the initial structural parameters as target structural parameters of the ventilation device that meets the mechanical performance requirements when the judgment unit determines that the mechanical performance requirements are met;

[0041] The second processing unit is connected to the judgment unit and is configured to optimize the initial structural parameters of the ventilation equipment to determine target structural parameters of the ventilation equipment that meet the mechanical performance requirements when the judgment unit determines that the mechanical performance requirements are not met.

[0042] The mechanical evaluation method for ventilation equipment of the present invention can quickly and directly determine the target structural parameters of the ventilation equipment that meet the mechanical performance requirements through electronic equipment by acquiring the initial structural parameters of the ventilation equipment, applying a preset load, and judging whether the ventilation equipment meets the mechanical performance requirements, thereby avoiding manual operation by mechanical analysts, reducing the manual operation time during the mechanical evaluation of the ventilation equipment, improving the mechanical evaluation efficiency of the ventilation equipment, and ensuring the operation effect of the ventilation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A flowchart of a mechanical evaluation method for ventilation equipment provided by an embodiment of the present invention;

[0044] Figure 2 A flowchart of an application example of a mechanical evaluation method for ventilation equipment provided by an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of the structure of a ventilation device provided by an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of the structure of a ventilation device provided by an embodiment of the present invention;

[0047] Figure 5 A schematic structural diagram of a parameterized load borne by a ventilation device provided in an embodiment of the present invention.

[0048] Figure 6 A structural schematic diagram of a beam model provided by an embodiment of the present invention;

[0049] Figure 7 A structural diagram of a mechanical evaluation device for ventilation equipment provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make those skilled in the art better understand the technical scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only intended to explain the application, rather than to limit the application. For those skilled in the art, the application can be implemented when some details in these specific details are not needed. The following description of the embodiments is only for providing a better understanding of the application by illustrating the examples of the application.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0052] In the related art, the mechanical evaluation process of ventilation equipment is completed manually by mechanical analysts. On the one hand, there are many ventilation equipment that need to be evaluated, the sizes are inconsistent, and the loads are different. Therefore, mechanical analysts are required to create a finite element model for each ventilation equipment, and then apply the load to the ventilation equipment, and perform multiple calculations. The efficiency of manual operation is low. On the other hand, feasible target ventilation equipment cannot be evaluated in one go. Mechanical analysts are required to manually modify the ventilation equipment parameters or change the applied loads, and submit the finite element analysis software for optimization calculation again until the calculation is passed. This further increases the manual operation time of mechanical analysts, reduces the mechanical evaluation efficiency of ventilation equipment, and affects the operation effect of the ventilation system.

[0053] The inventors' research found that by obtaining the initial structural parameters of the ventilation equipment, applying preset loads, and judging whether the ventilation equipment meets the mechanical performance requirements, manual operation by mechanical analysts is avoided, the manual operation time in the mechanical evaluation process of the ventilation equipment is reduced, the mechanical evaluation efficiency of the ventilation equipment is improved, and the operation effect of the ventilation system is ensured.

[0054] Based on this, in order to solve the problems of the prior art, the present invention proposes a mechanical evaluation method, a manufacturing method, a ventilation system and a device for ventilation equipment to improve the mechanical evaluation efficiency of the ventilation equipment and ensure the operation effect of the ventilation system.

[0055] Embodiment 1:

[0056] like Figure 1 As shown, this embodiment provides a mechanical evaluation method for ventilation equipment, which can be used to perform mechanical evaluation on ventilation equipment in a nuclear power plant, including steps S1 to S3:

[0057] Step S1. Acquire initial structural parameters of a ventilation device; the ventilation device comprises an outer frame and angle-adjustable fan blades disposed in the outer frame.

[0058] like Figure 3 to Figure 4 As shown, the ventilation device includes an outer frame 10 and blades 20. The outer frame is used for fixing, and the inner diameter of the outer frame is the vent of the ventilation device; the two ends of each blade are fixed on the outer frame, and the straight line formed by the two ends of the blade is used as the rotation axis, and the direction of the blade is adjusted to control the flow rate of the gas from the vent.

[0059] The initial structural parameters of the ventilation equipment include the initial structural parameters of the outer frame and the initial structural parameters of the fan blades. The initial structural parameters of the outer frame include the height Z of the outer frame and the width X of the outer frame. The initial structural parameters of the fan blades include the thickness B of the fan blades, the number of fan blade layers NUM, and the opening angle AN of the fan blades.

[0060] In some embodiments, the outer frame further includes a groove structure for fixing on an existing fixture, and the initial structural parameters of the groove structure include a groove structure depth W1 and a groove structure width W3, and the structural parameters of the outer frame further include a thickness C of the outer frame.

[0061] In some embodiments, the groove structure of the outer frame is fixed to the existing fixture by full welding.

[0062] In addition, the initial structural parameters of the ventilation equipment also include the material parameters used for the fan blades. The specific parameters of the material are shown in Table 1.

[0063] Table 1

[0064]

[0065] It can be understood that the material parameters used for the fan blades can serve as an important basis for determining whether the fan blades meet performance requirements.

[0066] During implementation, the initial structural parameters of the ventilation equipment are obtained by obtaining the design drawing of the ventilation equipment. The design drawing of the ventilation equipment may be a two-dimensional model of the ventilation equipment or a three-dimensional model of the ventilation equipment. In addition, the initial structural parameters of the ventilation equipment may also be obtained by obtaining the structural parameters of the ventilation equipment input by a user (mechanical analyst).

[0067] Step S2. In the finite element model of the ventilation equipment, a preset load corresponding to the initial structural parameters is applied to the outer frame and the fan blades to determine the force value of the fan blades.

[0068] Here, the preset load represents the load that the ventilation equipment bears during the actual gas circulation process. Specifically, the preset load includes the corresponding loads applied to the outer frame and the fan blades. For example, the corresponding load applied to the outer frame includes the full constraint load applied to the outer frame and the deadweight load of the outer frame, and the corresponding load applied to the fan blades includes the linear load of the airflow acting on the fan blades (i.e., the linear load applied to the fan blades) and the deadweight load of the fan blades.

[0069] During implementation, according to the initial structural parameters of the ventilation equipment, a finite element model of the ventilation equipment is created using finite element software (e.g., ANSYS, ABAQUS, COMSOL Multiphysics, SolidWorks Simulation, NASTRAN, etc.); wherein the finite element model of the ventilation equipment includes an outer frame beam unit for characterizing the outer frame and a blade beam model for characterizing the blade. Then, the preset loads applied to the outer frame and the blades are obtained, and the preset loads are applied to the outer frame and the blades to determine the force value of the blades.

[0070] It should be noted that the corresponding preset loads applied to the outer frame and the fan blades can be obtained after creating the finite element model of the ventilation equipment, or can be obtained at the same time as obtaining the initial structural parameters of the ventilation equipment. The corresponding preset loads applied to the outer frame and the fan blades can also be obtained at other times, and this application does not limit this.

[0071] In addition, the force value of the fan blade represents the maximum stress of the fan blade in the axial direction (along the length direction of the beam) and the transverse direction (perpendicular to the length direction of the beam) of the beam (fan blade beam model) during the simulation of actual gas circulation of the ventilation equipment.

[0072] Step S3. Determine whether the ventilation equipment meets the mechanical performance requirements based on the force value of the fan blade and the corresponding allowable value.

[0073] Here, the allowable value represents the maximum load that the fan blade can bear. The allowable value can be preset according to the standard specification. For example, the allowable value of the fan blade can be determined according to the requirements of RCC-M specification H3230.

[0074] It can be understood that if the force value of the fan blade is less than or equal to the corresponding allowable value, the ventilation device meets the mechanical performance requirements; if the force value of the fan blade is greater than the corresponding allowable value, the ventilation device does not meet the mechanical performance requirements. In this way, the mechanics of the ventilation device can be directly and automatically evaluated, improving the efficiency of the mechanical evaluation of the ventilation device.

[0075] In this embodiment, by acquiring the initial structural parameters of the ventilation equipment, applying preset loads, and judging whether the ventilation equipment meets the mechanical performance requirements, the target structural parameters of the ventilation equipment that meet the mechanical performance requirements can be quickly and directly determined, thereby improving the mechanical evaluation efficiency of the ventilation equipment and ensuring the operation effect of the ventilation system.

[0076] In some embodiments, the preset load includes the full constraint load applied to the outer frame, the deadweight load of the outer frame, the line load applied to each blade, and the deadweight load of the blade. Step S2 specifically includes steps S21 to S22:

[0077] Step S21. Obtain the linear load applied to each blade and the deadweight load of the blade, and obtain the full constraint load applied to the outer frame and the deadweight load of the outer frame.

[0078] Here, the linear load applied to each blade is used to simulate the load generated by the airflow acting on the blade. The linear load acts in a direction perpendicular to the outer frame, that is, perpendicular to the plane formed by the straight lines formed by the two ends of the multiple blades (the rotation axes of the multiple blades). The deadweight load of the blade can be determined based on the gravitational acceleration and the mass of the blade.

[0079] The full constraint load applied on the outer frame, i.e. the boundary condition of the ventilation equipment, is used to simulate the fixing and support conditions in the actual engineering of the ventilation equipment, ensuring that all degrees of freedom of the model at a specific position are restricted. By applying full constraints reasonably, the actual working conditions can be simulated more accurately, and the reliability and accuracy of the analysis can be improved. The deadweight load of the outer frame can be determined based on the gravitational acceleration and the mass of the outer frame.

[0080] Step S22. In the finite element model of the ventilation equipment, a full constraint load and a deadweight load of the outer frame are applied to the outer frame, and a line load and a deadweight load of the blade are applied to each blade.

[0081] Finite element software is used to automatically simulate the full constraint load applied by the outer frame, the deadweight load of the outer frame, the linear load applied to each blade, and the deadweight load of the blade to determine the force value of the blade.

[0082] In this embodiment, by obtaining the linear load applied to each fan blade and the self-weight load of the fan blade, the full constraint load applied to the outer frame, and the self-weight load of the outer frame, the forces that the ventilation equipment is subjected to during actual application can be directly simulated in the finite element method, so as to automatically evaluate the mechanics of the ventilation equipment.

[0083] In some embodiments, in step S21, obtaining the linear load applied to each blade specifically includes steps S211 to S212:

[0084] Step S211. Obtaining a pressure load perpendicular to the outer frame;

[0085] Here, the pressure load perpendicular to the outer frame is the pressure load generated by the airflow in the direction perpendicular to the outer frame. The pressure load is related to the speed of the airflow and the type of gas. The pressure load can be measured based on the load generated by the airflow acting on the fan blades in actual applications. Figure 5 As shown, the direction of the pressure load is perpendicular to the outer frame 10 .

[0086] Step S212: Determine the linear load applied to each blade according to the pressure load, which specifically includes:

[0087] According to the following formula (1), determine the linear load FN applied to each blade:

[0088] FN=P*Z*COS(AN*3.14 / 180) / NUM / 10 6 (1)

[0089] Where FN is the linear load applied to each blade (N / mm), P is the pressure load (Pa), Z is the height of the outer frame (mm), AN is the blade opening angle (°), and NUM is the number of blade layers.

[0090] Here, if Figure 5 As shown, P*Z*COS(AN*3.14 / 180) is the load (N / 10 6 mm). P*Z*COS(AN*3.14 / 180) / NUM / 10 6 is the linear load (N / mm) distributed to each layer of blades. It can be understood that the formula (1) is divided by 10 6 , because the commonly used unit in finite element software is mm, the linear load on each layer of fan blades is converted into units to adapt to the calculation scenario in the finite element software.

[0091] In this embodiment, obtaining the pressure load perpendicular to the outer frame and determining the linear load applied to each fan blade can more accurately simulate the pressure load generated by the airflow of the fan blade in actual application, providing a basis for subsequent more accurate evaluation of the mechanical properties of the ventilation equipment.

[0092] In some embodiments, the force values ​​of the fan blades include maximum tensile stress, maximum shear stress and maximum bending stress, and step S22 specifically includes:

[0093] By applying full constraint load to the external frame and linear load and gravity acceleration to each blade, the maximum tensile stress, maximum shear stress and maximum bending stress of the blade are determined.

[0094] Here, the finite element software is used to calculate the force values ​​of the fan blades. The force values ​​of the fan blades include the maximum tensile stress, the maximum shear stress, and the maximum bending stress. The directions of the maximum tensile stress and the maximum bending stress are along the axial direction of the beam (along the length direction of the beam), and the maximum shear stress is along the transverse direction of the beam (perpendicular to the length direction of the beam).

[0095] For example, the finite element analysis software ANSYS performs calculations. After the calculations are completed, the calculation results are as follows: The maximum tensile stress f t =8.3E-13MPa, maximum shear stress of beam structure f b =3.8E-8MPa, maximum bending stress of beam structure f v =170.0MPa.

[0096] In some other embodiments, the force value of the fan blade also includes the tensile and bending composite stress limit value of the beam structure. For example, the tensile and bending composite stress limit value of the beam structure is calculated according to the following formula (2-1):

[0097]

[0098] in, It indicates the ratio of the calculated value of tensile stress to the allowable value; It represents the ratio of the calculated bending stress to the allowable value. The force value of the fan blade is further limited by the limit value of the tensile and bending composite stress of the beam structure to improve the reliability of the mechanical evaluation of the ventilation equipment.

[0099] In this embodiment, by applying a fully constrained load to the external frame and applying a linear load and gravity acceleration to each blade, the maximum tensile stress, maximum shear stress and maximum bending stress of the blade can be directly determined, which can automatically evaluate the mechanical properties of the ventilation equipment and ensure the reliability of the mechanical evaluation of the ventilation equipment.

[0100] In some embodiments, step S3 specifically includes steps S31 to S33:

[0101] Step S31. Determine whether the ventilation equipment meets the mechanical performance requirements based on the force value of the fan blade and the corresponding allowable value.

[0102] Here, the allowable value of the fan blade can be determined according to the requirements of RCC-M specification H3230. The determined allowable value is as follows:

[0103] Allowable limit value of beam tensile stress F t =min{0.6S y ,0.5S u}=117.6Mpa, beam shear stress allowable limit F b =min{0.66Sy ,0.55S u}=129.4MPa, beam bending stress allowable limit F v =min{0.4S y ,0.33S u}=78.4MPa, the tensile and bending composite stress limit of the beam structure should meet the following requirements:

[0104] Step S32. When it is determined that the mechanical performance requirements are met, the initial structural parameters are determined as target structural parameters of the ventilation device that meets the mechanical performance requirements;

[0105] Step S33: When it is determined that the mechanical performance requirements are not met, the initial structural parameters of the ventilation equipment are optimized to determine the target structural parameters of the ventilation equipment that meet the mechanical performance requirements.

[0106] For example, for the initial structural parameters of the ventilation equipment (height Z of the outer frame = 500 mm, width X of the outer frame = 2000 mm, thickness B of the fan blade = 1 mm, number of fan blade layers NUM = 10, and opening angle AN of the fan blade = 30°), after applying the corresponding preset load (P = 3000 Pa), the evaluation results are shown in Table 2:

[0107] Table 2

[0108] Stress Type Force value (MPa) Allowable value (MPa) Stress ratio Tensile stress 8.3E-13 117.6 0 Bending stress 170.0 129.4 1.314 Shear stress 3.8E-8 78.4 0 Stretch and bend combination 1.314 1 1.314

[0109] It can be seen from Table 2 that the calculated bending stress value is greater than the allowable value, and the combined tension-bending stress ratio is greater than 1. The evaluation result is that the mechanical properties requirements are not met.

[0110] Here, when it is determined that the mechanical performance requirements are not met, the initial structural parameters of the ventilation device are optimized. For example, the initial structural parameters of the outer frame can be optimized, and the initial structural parameters of the fan blades can also be optimized.

[0111] During implementation, the parameters to be optimized can be prioritized, for example, the initial structural parameters of the fan blades are optimized first, and then the initial structural parameters of the outer frame are optimized. When optimizing the initial structural parameters of the outer frame and the initial structural parameters of the fan blades, the value range, the interval step size of each optimization, and the objective function can be set for each initial structural parameter, and then the ventilation equipment model is updated, the preset load is applied, and the allowable stress judgment is performed in sequence until the target structural parameters of the ventilation equipment that meet the mechanical performance requirements (meet the objective function) are determined.

[0112] In this embodiment, by determining whether the ventilation equipment meets the mechanical performance requirements, and optimizing the initial structural parameters of the ventilation equipment if it is determined that the mechanical performance requirements are not met, the target structural parameters of the ventilation equipment that meet the mechanical performance requirements can be directly and quickly determined. This avoids manual operation by mechanical analysts, reduces the manual operation time in the mechanical evaluation process of the ventilation equipment, improves the mechanical evaluation efficiency of the ventilation equipment, and ensures the operation effect of the ventilation system.

[0113] In some embodiments, the optimizing the structural parameters of the ventilation equipment specifically includes:

[0114] S331. Adjust the initial structural parameters of the fan blades, and repeat steps S1 to S31 until the target structural parameters of the ventilation device that meet the mechanical performance requirements are determined;

[0115] The initial structural parameters of the fan blades include the thickness of the fan blades, the number of fan blade layers, and the opening angle of the fan blades.

[0116] Here, the optimization of the initial structural parameters of the fan blades can set priorities for the initial parameters of the fan blades. For example, the thickness of the fan blades, the number of layers of the fan blades, and the opening angle of the fan blades are optimized in sequence.

[0117] During implementation, the interval step size and the objective function of each optimization are set for the parameters to be optimized. Then, according to the objective function, the finite element model is solved cyclically to obtain the optimal solution of the objective function, that is, to determine the target structural parameters of the ventilation equipment that meet the mechanical performance requirements.

[0118] For example, take optimizing fan blade thickness.

[0119] The optimized parameter is set to the fan blade thickness B, the value range can be 1mm to 4mm, the thickness interval is 0.2mm, that is, the step length is 0.2mm.

[0120] Set the objective function to: maximum tensile stress of the beam f t (B)≤ allowable limit of beam tensile stress F t =117.6MPa, maximum shear stress of beam f b (B)≤ allowable limit of beam shear stress F b =129.4MPa, maximum bending stress of beam f v (B)≤ allowable limit value of beam bending stress F v =78.4MPa, the tensile and bending composite stress limit of the beam structure should meet the following requirements:

[0121]

[0122] According to the optimized parameters and the set objective function, the finite element model is solved cyclically using ANSYS finite element analysis software. The APDL command is as follows:

[0123]

[0124] In the above APDL command, the optimized parameter blade thickness B can range from 1mm to 4mm, with a step length of 0.2mm, that is, the minimum value of B is 1mm, the maximum value is 4mm, and a value is taken every 0.2mm interval for solution calculation. Among them, the larger the maximum value of B is set, the better. In this embodiment, the maximum value of B is set to 4.

[0125] After the above solution, the optimal solution of B is 1.4.

[0126] When B=1.4, the evaluation results are shown in Table 3:

[0127] Table 3

[0128] Stress Type Calculated value (MPa) Allowable value (MPa) Stress ratio Tensile stress 4.3E-13 117.6 0 Bending stress 122.2 129.4 0.944 Shear stress 1.1E-9 78.4 0 Stretch and bend combination 0.944 1 0.944

[0129] In some embodiments, the method for mechanical evaluation of ventilation equipment further includes outputting a mechanical analysis report of the ventilation equipment.

[0130] According to the optimization results of the above optimization parameters, that is, the fan blade thickness B=1.4mm, a mechanical analysis report of the equipment with a fan blade thickness of 1.4mm is output.

[0131] In this embodiment, by adjusting the initial structural parameters of the fan blades, the optimization time of the ventilation equipment can be shortened and the efficiency of the mechanical evaluation of the ventilation equipment can be further improved.

[0132] Embodiment 2:

[0133] The specific implementation process of the above method is described below in conjunction with specific application examples.

[0134] When conducting mechanical analysis on ventilation equipment, such as vents and blinds, the mechanical analyst usually uses beam units or shell units to create a finite element model, then applies various loads, and finally submits the finite element analysis software for calculation. If the calculation passes once, the mechanical analysis report of the ventilation equipment can be directly output. If the calculation fails once, the mechanical analyst needs to manually modify the ventilation equipment parameters, or change the applied loads, and submit the finite element analysis software again for optimization calculation until the calculation passes.

[0135] In addition, if there are multiple ventilation devices with different sizes and different loads, the mechanical analyst needs to create a finite element model for each ventilation device, and then apply the load to the ventilation device and perform multiple calculations. Even worse, multiple optimization calculations are required.

[0136] It can be seen from this that when mechanical analysts encounter a situation where the ventilation equipment fails to pass the calculation at one time, or when multiple ventilation equipment need to be mechanically analyzed, the mechanical analysts have to update the model multiple times and submit the calculation multiple times, which brings a lot of calculation work to the mechanical analysts and affects work efficiency.

[0137] The fast calculation and evaluation method of ventilation equipment in this embodiment is used to solve the problem that existing mechanical personnel have to do a lot of repetitive work and affect work efficiency.

[0138] This embodiment provides a method for rapid calculation and evaluation of ventilation equipment, including: obtaining a ventilation equipment design drawing;

[0139] The ventilation equipment design drawing may be a two-dimensional model of the equipment or a three-dimensional model of the equipment.

[0140] In some embodiments, the method for rapid calculation and assessment of ventilation equipment further includes: determining parameterized dimensions of the equipment according to a design drawing of the ventilation equipment;

[0141] The equipment parameterized dimensions include the external dimensions of the ventilation equipment frame, the external dimensions of the fan blades, the number of layers of the fan blades, the opening angle of the fan blades and other parameterized dimensions.

[0142] In some embodiments, the method for rapid calculation and assessment of ventilation equipment further includes: determining the parameterized load borne by the equipment according to the actual situation of the ventilation equipment;

[0143] The parameterized loads include gravitational acceleration, earthquake acceleration, pressure loads borne by the fan blades, etc.

[0144] In some embodiments, the method for rapid calculation and evaluation of ventilation equipment further includes: using finite element analysis software to perform solution calculations and evaluate the results.

[0145] The finite element analysis software, such as ANSYS software, first creates a finite element model, such as a beam model, based on the parametric dimensions of the equipment before solving the calculation. Then, the parametric load borne by the equipment is applied to the finite element model. Then, boundary conditions are applied to the finite element model, and then the finite element analysis software is submitted for solving the calculation.

[0146] The finite element analysis software solves the calculation and obtains the calculated values ​​of tensile stress, shear stress and bending stress of the ventilation equipment beam model.

[0147] According to the specifications, such as the RCC-M specification, the allowable values ​​of tensile stress, shear stress and bending stress of the equipment beam model are calculated.

[0148] If the calculated value of tensile stress is less than the allowable value of tensile stress, and the calculated value of shear stress is less than the allowable value of shear stress, and the calculated value of bending stress is less than the allowable value of bending stress, then the stress calculation result of the ventilation equipment is evaluated as passed, otherwise it is evaluated as failed.

[0149] In some embodiments, the ventilation equipment rapid calculation and assessment method further includes: determining parameters to be optimized and setting an objective function;

[0150] If the stress calculation result of the ventilation equipment fails to pass the evaluation, the parameters that need to be optimized are first determined, which may be equipment size parameters or equipment load parameters, and then the objective function is established.

[0151] The parameters that need to be optimized, such as a, b, c...

[0152] find a=(a1,a2,…,a n )

[0153] find b=(b1,b2,…,b n )

[0154] find c=(c1,c2,…,c n )

[0155] …

[0156] Among them, a1, b1, c1… are the minimum values ​​of the range of parameters to be optimized;

[0157] a n 、c n 、c n …is the maximum value of the range of the parameter to be optimized;

[0158] The objective function is:

[0159] f i (a) = f(a i ), i=1,2,…,n

[0160] f i (b) = f(b i ), i=1,2,…,n

[0161] f i (c) = f(c i ), i=1,2,…,n

[0162] …

[0163] Among them, f(a i )、f(b i )、f(c i )…is the objective function;

[0164] f i (a), f i (b), f i (c) ...calculate the value of the objective function;

[0165] Objective function limits:

[0166] f i (a)≤[f(a)],i=1,2,…,n

[0167] f i (b)≤[f(b)],i=1,2,…,n

[0168] f i (c)≤[f(c)],i=1,2,…,n

[0169] …

[0170] Among them, [f(a)], [f(b)], [f(c)]… are the limits of the objective function.

[0171] In some embodiments, the ventilation equipment rapid calculation and evaluation method further includes: according to the objective function, performing a cyclic solution on the finite element model to obtain an optimal solution of the objective function;

[0172] According to the parameters, objective function and objective function limit to be optimized, finite element analysis software, such as ANSYS, is used to perform cyclic solving to find the optimal value of the parameter to be optimized. opt 、b opt 、c opt ….

[0173] In some embodiments, the ventilation equipment rapid calculation and assessment method further includes: outputting a ventilation equipment mechanical analysis report;

[0174] If the equipment is evaluated as passed, a mechanical analysis report of the ventilation equipment will be directly output.

[0175] If the equipment fails the evaluation, the optimal value a of the parameter to be optimized is opt 、b opt 、c opt …conduct output ventilation equipment mechanical analysis report.

[0176] For example, Figure 3 to Figure 4As shown in the figure, the ventilation equipment vent for a certain project has a vent height Z of 500mm and a width X of 2000mm. The vent outer frame C is a groove structure formed by bending a 2mm thick plate. The groove structure has a depth W1 of 10mm and a width W3 of 20mm. The fan blade thickness B is 1mm, with a total of 10 layers of fan blades, and the fan blade opening angle AN is 30°. The loads are a pressure differential load of 3000Pa and a deadweight load, and the outer frame is fixedly constrained by full welds. To determine whether the vent meets the strength requirements of RCC-M specification H3230. The vent material information is shown in Table 1 above.

[0177] like Figure 2 As shown, the mechanical evaluation method of the ventilation equipment in this embodiment specifically includes steps S101 to S107:

[0178] Step S101: Obtain ventilation equipment design drawings;

[0179] In this embodiment, the size, load, material and fixation of the tuyere model are as described above;

[0180] Step S102: Determine the parameterized size of the equipment according to the ventilation equipment design drawing;

[0181] According to the tuyere size information in the embodiment, the parameterized size is set as follows:

[0182] X=2000, that is, X is the parameterized size of the tuyere width;

[0183] Z = 500, i.e. Z is the parameterized dimension of the tuyere height;

[0184] W1=10, that is, W1 is the parameterized dimension of the depth of the outer frame groove structure;

[0185] W3=20, that is, W3 is the parameterized dimension of the width of the outer frame groove structure;

[0186] C = 2, that is, C is the parameterized dimension of the thickness of the plate used for the outer frame;

[0187] B = 1, that is, B is the parameterized dimension of the blade thickness;

[0188] NUM=10, that is, NUM is the parameterized size of the number of blade layers;

[0189] AN=30°, that is, AN is the parameterized dimension of the fan blade opening angle.

[0190] Step S103: Determine the parameterized load borne by the equipment according to the actual situation of the ventilation equipment (pressure load 3000Pa, and gravity acceleration 1g);

[0191] According to the embodiment, the load on the tuyere is 3000Pa, and the gravity acceleration is 1g=9.81m / s. 2 ;

[0192] Set the parametric load on the equipment to:

[0193] P=3000, that is, P is the pressure parameterized load.

[0194] Step S104: using finite element analysis software to perform calculations and evaluate the results;

[0195] According to the tuyere size information in this embodiment, a finite element beam model (such as Figure 6 As shown), the outer frame beam unit is fully constrained (full constraints are used in finite element analysis to simulate the fixing and supporting conditions in actual engineering, ensuring that all degrees of freedom of the model at a specific position are restricted. By reasonably applying full constraints, the actual working conditions can be simulated more accurately, and the reliability and accuracy of the analysis can be improved.), a line load FN is applied to the fan blade beam model,

[0196] That is, FN=P*Z*COS(AN*3.14 / 180) / NUM / 10 6 =0.13N / mm (where P*Z*COS(AN*3.14 / 180) is the effective area perpendicular to the blades; / NUM is the load distributed to each layer of blades).

[0197] Then submit it to the finite element analysis software ANSYS for calculation.

[0198] After the calculation is completed, the results are as follows:

[0199] Maximum tensile stress f of beam structure t =8.3E-13MPa

[0200] Maximum shear stress f of beam structure b =3.8E-8MPa

[0201] Maximum bending stress f of beam structure v =170.0MPa

[0202] According to the requirements of RCC-M specification H3230, under normal working conditions,

[0203] Allowable limit value of beam tensile stress F t =min{0.6S y ,0.5S u =117.6MPa

[0204] Allowable limit value of beam shear stress F b =min{0.66S y ,0.55S u =129.4MPa

[0205] Allowable limit value of beam bending stress F v =min{0.4S y ,0.33S u =78.4MPa

[0206] The combined tensile and bending stress limits of beam structures should satisfy: (in, It indicates the ratio of the calculated value of tensile stress to the allowable value; Indicates the ratio of the calculated bending stress value to the allowable value. )

[0207] The evaluation results are shown in Table 2 above.

[0208] It can be seen from Table 2 above that the calculated bending stress value is greater than the allowable value, and the combined tension-bending stress ratio is greater than 1, so the evaluation result fails.

[0209] Step S105: Determine the parameters to be optimized and set the objective function;

[0210] In this embodiment, optimization of fan blade thickness is taken as an example.

[0211] The optimized parameter is set to the fan blade thickness B, the value range can be 1mm to 4mm, the thickness interval is 0.2mm, that is, the step length is 0.2mm.

[0212] Set the objective function to:

[0213] Maximum tensile stress of the beam f t (B)≤ allowable limit of beam tensile stress F t =117.6MPa

[0214] Maximum shear stress of beam f b (B)≤ allowable limit of beam shear stress F b =129.4MPa

[0215] Maximum bending stress of the beam f v (B)≤ allowable limit value of beam bending stress F v =78.4MPa

[0216] The combined tensile and bending stress limits of beam structures should satisfy:

[0217] Step S106: According to the objective function, the finite element model is solved cyclically to obtain the optimal solution of the objective function;

[0218] According to the optimized parameters and the set objective function, the finite element model is solved cyclically using ANSYS finite element analysis software. The APDL command is as follows:

[0219]

[0220]

[0221] In the above APDL command, the optimized parameter blade thickness B can range from 1mm to 4mm, with a step length of 0.2mm, that is, the minimum value of B is 1mm, the maximum value is 4mm, and a value is taken every 0.2mm interval for solution calculation. Among them, the larger the maximum value of B is set, the better. In this embodiment, the maximum value of B is set to 4.

[0222] After the above solution, the optimal solution of B is 1.4.

[0223] When B=1.4, the evaluation results are shown in Table 3.

[0224] Step S107: Outputting a mechanical analysis report of the ventilation equipment.

[0225] According to the optimization results of the above optimization parameters, that is, the fan blade thickness B = 1.4mm, a mechanical analysis report of the equipment with a fan blade thickness of 1.4mm is output.

[0226] In this embodiment, the automated analysis and calculation of the finite element software is realized, which avoids the mechanical analysts' large amount of work of repeatedly debugging the model, greatly reduces the workload of the mechanical analysts, and improves the work efficiency.

[0227] It can be understood that this embodiment only optimizes the fan blade thickness B parameter. Similarly, other parameters can also be optimized in the same way. Similarly, multi-parameter optimization can also be optimized in the same way.

[0228] The invention provides a method for rapid calculation and evaluation of ventilation equipment, which first creates a parameterized model, applies a parameterized load, creates an objective function, sets the objective function limit, and then submits the finite element software for cyclic calculation to find the optimal values ​​of the parameters to be optimized, aopt, bopt, copt... In this way, it is avoided that the mechanics personnel repeatedly debug the model, greatly reduces the workload of the mechanics personnel, and improves the work efficiency.

[0229] Embodiment 3:

[0230] The present invention also provides a method for manufacturing a ventilation device, the method comprising:

[0231] Using the mechanical evaluation method of the ventilation equipment described in any one of the above-mentioned embodiments 1 or 2, the target structural parameters of the ventilation equipment that meet the mechanical performance requirements are determined;

[0232] The ventilation equipment is manufactured according to the determined target structural parameters.

[0233] In this embodiment, the target structural parameters of the ventilation equipment that meet the mechanical performance requirements are determined and the ventilation equipment is manufactured. Because the determination of the target structural parameters is automated, the determination efficiency of the target structural parameters is high, thereby improving the manufacturing efficiency of the ventilation equipment while ensuring the ventilation effect of the ventilation equipment.

[0234] Embodiment 4:

[0235] The present invention also provides a ventilation system, comprising:

[0236] A ventilation device formed by the manufacturing method described in the above embodiment 3;

[0237] A ventilation duct is connected to the ventilation device and is used to receive the gas passing through the ventilation device.

[0238] The ventilation system in this embodiment is a ventilation device manufactured by the manufacturing method of Example 3. Because the ventilation device can improve the manufacturing efficiency of the ventilation device while ensuring the ventilation effect of the ventilation device, the ventilation system can improve the manufacturing efficiency of the ventilation system while ensuring the ventilation effect.

[0239] Embodiment 5:

[0240] like Figure 7 As shown, the present invention also provides a mechanical evaluation device for ventilation equipment, the device 100 comprising:

[0241] An acquisition module 11 is configured to acquire initial structural parameters of a ventilation device; the ventilation device comprises an outer frame and a fan blade disposed in the outer frame and having an adjustable angle;

[0242] A loading module 12, connected to the acquisition module, is configured to apply a preset load corresponding to the initial structural parameters to the outer frame and the fan blades in a finite element model of the ventilation device to determine a force value of the fan blades;

[0243] The judgment module 13 is connected to the loading module and is configured to judge whether the ventilation device meets the mechanical performance requirements based on the force value of the fan blade and the corresponding allowable value.

[0244] In some embodiments, the preset load includes the full constraint load applied to the outer frame, the deadweight load of the outer frame, the line load applied to each blade, and the deadweight load of the blade. The loading module 12 includes:

[0245] An acquisition unit, which is configured to acquire a linear load applied to each blade and a deadweight load of the blade, and to acquire a full constraint load applied to the outer frame and a deadweight load of the outer frame;

[0246] The loading unit is connected to the acquisition unit and is configured to apply a full constraint load and a deadweight load of the outer frame to the outer frame in the finite element model of the ventilation equipment, and to apply a linear load and a deadweight load of the blade to each blade.

[0247] In some embodiments, the acquisition unit is further used to acquire a pressure load perpendicular to the outer frame;

[0248] According to the pressure load, the linear load applied to each blade is determined, which specifically includes:

[0249] According to the following formula (1), determine the linear load FN applied to each blade:

[0250] FN=P*Z*COS(AN*3.14 / 180) / NUM / 10 6 (1)

[0251] Where FN is the linear load applied to each blade (N / mm), P is the pressure load (Pa), Z is the height of the outer frame (mm), AN is the blade opening angle (°), and NUM is the number of blade layers.

[0252] In some embodiments, the force values ​​of the fan blades include maximum tensile stress, maximum shear stress and maximum bending stress. The loading unit is also used to determine the maximum tensile stress, maximum shear stress and maximum bending stress of the fan blades based on applying a full constraint load to the external frame and applying a linear load and gravity acceleration to each fan blade.

[0253] In some embodiments, the determination module includes:

[0254] A judgment unit, configured to judge whether the ventilation device meets the mechanical performance requirements according to the force value of the fan blade and the corresponding allowable value;

[0255] A first processing unit is connected to the judgment unit and is configured to determine the initial structural parameters as target structural parameters of the ventilation device that meets the mechanical performance requirements when the judgment unit determines that the mechanical performance requirements are met;

[0256] The second processing unit is connected to the judgment unit and is configured to optimize the initial structural parameters of the ventilation equipment to determine target structural parameters of the ventilation equipment that meet the mechanical performance requirements when the judgment unit determines that the mechanical performance requirements are not met.

[0257] In some embodiments, the second processing unit is further used to optimize the structural parameters of the ventilation equipment when the judgment unit determines that the mechanical performance requirements are not met, specifically including:

[0258] Adjust the initial structural parameters of the fan blades, and repeat the actions of the acquisition module, the loading module, the judgment unit, and the first processing unit in sequence until the target structural parameters of the ventilation device that meet the mechanical performance requirements are determined;

[0259] The initial structural parameters of the fan blades include the thickness of the fan blades, the number of fan blade layers, and the opening angle of the fan blades.

[0260] It should be noted that this embodiment is a corresponding device of the mechanical evaluation method for ventilation equipment in the above-mentioned embodiment 1. The method in embodiment 1 can be implemented by using this device. The specific implementation method can refer to the description in the mechanical evaluation method for ventilation equipment, and this embodiment will not be repeated here.

[0261] In addition, in combination with the mechanical evaluation method of the ventilation equipment in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any mechanical evaluation method of the ventilation equipment in the above embodiment is implemented.

[0262] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0263] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0264] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A mechanical evaluation method for ventilation equipment, characterized in that: include: S1. Obtaining initial structural parameters of the ventilation device; the ventilation device includes an outer frame and a fan blade disposed in the outer frame and having an adjustable angle; S2. In the finite element model of the ventilation device, a preset load corresponding to the initial structural parameters is applied to the outer frame and the fan blades to determine the force value of the fan blades; S3. Determine whether the ventilation equipment meets the mechanical performance requirements based on the force value of the fan blade and the corresponding allowable value.

2. The mechanical evaluation method of ventilation equipment according to claim 1, characterized in that: The preset load includes the full constraint load applied on the outer frame, the deadweight load of the outer frame, the line load applied on each blade, and the deadweight load of the blade. Step S2 specifically includes: S21. Obtain the linear load applied to each blade and the deadweight load of the blade, and obtain the full constraint load applied to the outer frame and the deadweight load of the outer frame; S22. In the finite element model of the ventilation equipment, a full constraint load and a deadweight load of the outer frame are applied to the outer frame, and a line load and a deadweight load of the blade are applied to each blade.

3. The mechanical evaluation method of ventilation equipment according to claim 2, characterized in that: In step S21, the linear load applied to each blade is obtained, which specifically includes: S211. Obtain the pressure load perpendicular to the outer frame; S212. According to the pressure load, determine the linear load applied to each blade, which specifically includes: According to the following formula (1), determine the linear load FN applied to each blade: FN=P*Z*COS(AN*3.14 / 180) / NUM / 10 6 (1) Where FN is the linear load applied to each blade (N / mm), P is the pressure load (Pa), Z is the height of the outer frame (mm), AN is the blade opening angle (°), and NUM is the number of blade layers.

4. The mechanical evaluation method of ventilation equipment according to claim 2, characterized in that: The force values ​​of the fan blades include maximum tensile stress, maximum shear stress and maximum bending stress. Step S22 specifically includes: By applying a full constraint load to the external frame and applying a linear load and gravity acceleration to each blade, the maximum tensile stress, maximum shear stress and maximum bending stress of the blade are determined.

5. The mechanical evaluation method of ventilation equipment according to claim 1, characterized in that: Step S3 specifically includes: S31. According to the force value of the fan blade and the corresponding allowable value, determine whether the ventilation equipment meets the mechanical performance requirements; S32. When it is determined that the mechanical performance requirements are met, the initial structural parameters are determined as target structural parameters of the ventilation device that meets the mechanical performance requirements; S33. When it is determined that the mechanical performance requirements are not met, the initial structural parameters of the ventilation equipment are optimized to determine the target structural parameters of the ventilation equipment that meet the mechanical performance requirements.

6. The mechanical evaluation method of ventilation equipment according to claim 5, characterized in that: The optimization of the structural parameters of the ventilation equipment specifically includes: S331. Adjust the initial structural parameters of the fan blades, and repeat steps S1 to S31 until the target structural parameters of the ventilation device that meet the mechanical performance requirements are determined; The initial structural parameters of the fan blades include the thickness of the fan blades, the number of fan blade layers, and the opening angle of the fan blades.

7. A method for manufacturing a ventilation device, characterized in that: include: Determine the target structural parameters of the ventilation equipment that meets the mechanical performance requirements according to any evaluation method of claims 5-6; The ventilation equipment is manufactured according to the determined target structural parameters.

8. A ventilation system, characterized in that: include: A ventilation device formed by the manufacturing method according to claim 7; A ventilation duct is connected to the ventilation device and is used to receive the gas passing through the ventilation device.

9. A mechanical evaluation device for ventilation equipment, characterized in that: The device comprises: An acquisition module is configured to acquire initial structural parameters of a ventilation device; the ventilation device comprises an outer frame and a fan blade disposed in the outer frame and having an adjustable angle; A loading module connected to the acquisition module, which is configured to apply a preset load corresponding to the initial structural parameters to the outer frame and the fan blades in a finite element model of the ventilation device to determine a force value of the fan blades; The judgment module is connected to the loading module and is configured to judge whether the ventilation device meets the mechanical performance requirements based on the force value of the fan blade and the corresponding allowable value.

10. The mechanical evaluation device for ventilation equipment according to claim 9, characterized in that: The judging module comprises: A judgment unit, configured to judge whether the ventilation device meets the mechanical performance requirements according to the force value of the fan blade and the corresponding allowable value; A first processing unit is connected to the judgment unit and is configured to determine the initial structural parameters as target structural parameters of the ventilation device that meets the mechanical performance requirements when the judgment unit determines that the mechanical performance requirements are met; The second processing unit is connected to the judgment unit and is configured to optimize the initial structural parameters of the ventilation equipment to determine target structural parameters of the ventilation equipment that meet the mechanical performance requirements when the judgment unit determines that the mechanical performance requirements are not met.

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