Planetary gear reducer structure design method and system based on finite element analysis

Abstract

The invention relates to the field of speed reducer design, in particular to a planetary gear speed reducer structure design method and system based on finite element analysis, and current test data is obtained by testing a planetary gear speed reducer. And then three-dimensional modeling and simulation analysis are carried out, and the structure of the planetary gear reducer is optimized based on the simulation analysis. After the optimized structure of the planetary gear reducer is manufactured into the planetary gear reducer, the test is carried out again. And under continuous iteration and optimization, the final planetary gear reducer structure can meet the use requirements in various scenes. The speed reducer is suitable for various transmission devices, the operation efficiency of the devices is effectively improved, the service life of the devices is effectively prolonged, and the wide industrial application value is achieved.

Description

Technical Field

[0001] The invention relates to the field of reducer design, and in particular to a planetary gear reducer structure design method and system based on finite element analysis. Background Art

[0002] With the continuous improvement of industrial automation and high-efficiency transmission requirements, planetary gear reducers are increasingly used in transmission equipment. With its compact structure, high transmission efficiency and strong load-bearing capacity, planetary gear reducers have become an important component in conveyor belt equipment. However, during operation, planetary gear reducers in current applications often face problems such as large vibration, high noise and early fatigue damage. These problems not only reduce the stability and service life of conveyor belt equipment, but also directly affect the efficiency and energy consumption of the equipment. Therefore, the research and optimization of planetary gear reducers is particularly important.

[0003] At present, engineers often use experimental methods to test the working performance of planetary gear reducers, but this method has many shortcomings. First, it is difficult for traditional experiments to gain an in-depth understanding of the stress distribution, modal characteristics and vibration response laws inside the reducer, resulting in a lack of sufficient theoretical basis for design optimization; second, the experimental cost is high, and frequent testing processes consume a lot of time and resources. Therefore, the optimization design method of planetary gear reducers is in urgent need of improvement. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a planetary gear reducer structural design method and system based on finite element analysis to solve the problems in the background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A planetary gear reducer structural design method based on finite element analysis of the present invention comprises the following steps:

[0007] Based on the use of a pre-built experimental platform to test the transmission efficiency, torque and vibration data of the current planetary gear reducer;

[0008] Constructing a three-dimensional digital model of the current planetary gear reducer, and performing simulation analysis on the three-dimensional digital model to obtain simulation analysis data, wherein the simulation analysis includes static analysis, modal analysis, harmonic response and vibration analysis, and vibration characteristic analysis;

[0009] Optimizing the structure of the current planetary gear reducer based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure;

[0010] A new planetary gear reducer is manufactured based on the optimized planetary gear reducer structure, and the new planetary gear reducer is used as the current planetary gear reducer. The transmission efficiency, torque and vibration data of the current planetary gear reducer are tested based on the pre-built experimental platform until the transmission efficiency, the torque and the vibration data reach the preset optimization targets. When the simulation analysis data reaches the preset optimization targets, the target structure of the planetary gear reducer is obtained.

[0011] In one embodiment of the present application, a three-dimensional digital model of a planetary gear reducer is constructed, including:

[0012] Construct an initial digital model of the planetary gear reducer;

[0013] Performing finite element meshing on the initial digital model, and performing local encryption processing on the contact area between the gear and the bearing of the initial digital model to obtain an intermediate digital model;

[0014] The material parameters of the intermediate digital model are set to obtain a three-dimensional digital model, wherein the material parameters include material properties, density and elastic modulus.

[0015] In one embodiment of the present application, simulation analysis is performed on the three-dimensional digital model to obtain simulation analysis data, including:

[0016] Performing static analysis on the three-dimensional digital model to obtain stress distribution data of the gear;

[0017] Performing dynamic analysis on the three-dimensional digital model to obtain the gear slip ratio and friction power loss of the gear;

[0018] Performing thermal analysis on the three-dimensional digital model to obtain thermal analysis data of the gear;

[0019] Performing contact mechanics analysis on the three-dimensional digital model to obtain contact force analysis data;

[0020] Performing modal analysis on the three-dimensional digital model to obtain the natural frequency and vibration mode of the current planetary gear reducer;

[0021] Performing harmonic response and vibration analysis on the three-dimensional digital model to obtain the response frequency and response amplitude of the current planetary gear reducer when responding to various load excitation frequencies;

[0022] The vibration characteristics of the three-dimensional digital model are analyzed to obtain the vibration amplitude and acceleration of the current planetary gear reducer when responding to various load excitation frequencies.

[0023] In one embodiment of the present application, the three-dimensional digital model is subjected to harmonic response and vibration analysis to obtain the response frequency and response amplitude of the current planetary gear reducer when responding to various load excitation frequencies, including:

[0024] Simulate the frequency response curve of the current planetary gear reducer under loads of multiple frequencies and sinusoidal variations, wherein the frequency response curve includes the corresponding relationship between displacement and frequency;

[0025] Finding the peak frequency from the stress-strain frequency response curve, and constructing a harmonic response motion equation based on the peak frequency, wherein the peak frequency and the response frequency;

[0026] The harmonic response motion equation is solved to obtain a steady-state response of the peak frequency, wherein the steady-state response is a response amplitude of the response frequency.

[0027] In one embodiment of the present application, the vibration characteristics of the three-dimensional digital model are analyzed to obtain the vibration amplitude and acceleration of the current planetary gear reducer when responding to various load excitation frequencies, including:

[0028] Analyze the frequency components of the peak frequency and the amplitude of each frequency component to obtain the vibration amplitude of the current planetary gear reducer when responding to various load excitation frequencies;

[0029] Performing inverse Fourier transform on the frequency response curve to obtain a time domain response curve, wherein the time domain response curve includes a corresponding relationship between displacement and time; and extracting acceleration from the time domain response curve.

[0030] In one embodiment of the present application, the structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including:

[0031] Adjusting the module of the gear in the current planetary gear reducer based on the stress distribution data of the gear to balance the gear strength and transmission accuracy;

[0032] adjusting a pressure angle of a gear based on a gear slip ratio and friction power loss of the gear to balance sliding friction and load carrying capacity;

[0033] A target area where the impact load is greater than a preset threshold is determined based on the response frequency and the response amplitude of the response frequency, and the target area is optimized to reduce the meshing impact.

[0034] In one embodiment of the present application, the structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including:

[0035] Material optimization is performed based on the maximum stress in the stress distribution data and the vibration amplitude, wherein the material optimization includes material selection and material surface hardening treatment.

[0036] In one embodiment of the present application, the structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including:

[0037] Based on the thermal analysis data and the contact mechanics analysis data, the surface of the current planetary gear reducer is covered with a low friction coefficient coating, and the surface of the current planetary gear reducer is carburized and nitrided.

[0038] In one embodiment of the present application, the structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including:

[0039] The distance between the axes of the gears is adjusted based on the response frequency to reduce the vibration amplitude.

[0040] The present application also provides a planetary gear reducer structure design system based on finite element analysis, comprising:

[0041] The test module is used to test the transmission efficiency, torque and vibration data of the current planetary gear reducer based on the pre-built experimental platform;

[0042] A simulation analysis module, used for constructing a three-dimensional digital model of the current planetary gear reducer, performing simulation analysis on the three-dimensional digital model, and obtaining simulation analysis data, wherein the simulation analysis includes static analysis, modal analysis, harmonic response and vibration analysis, and vibration characteristic analysis;

[0043] An optimization module, used for optimizing the structure of the current planetary gear reducer based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure;

[0044] An iteration module is used to manufacture a new planetary gear reducer based on the optimized planetary gear reducer structure, use the new planetary gear reducer as the current planetary gear reducer, and return to testing the transmission efficiency, torque and vibration data of the current planetary gear reducer based on a pre-built experimental platform until the transmission efficiency, the torque and the vibration data reach a preset optimization target; when the simulation analysis data reaches the preset optimization target, the target structure of the planetary gear reducer is obtained.

[0045] The beneficial effects of the present invention are: a planetary gear reducer structure design method and system based on finite element analysis of the present invention obtains current test data by testing the planetary gear reducer. Then three-dimensional modeling and simulation analysis are performed, and the structure of the planetary gear reducer is optimized based on the simulation analysis. After the optimized planetary gear reducer structure is manufactured into a planetary gear reducer, it is tested again. With continuous iteration and optimization, the final planetary gear reducer structure can meet the use requirements in various scenarios. The reducer designed in this application is suitable for various types of transmission equipment, effectively improves the operating efficiency and service life of the equipment, and has a wide range of industrial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0047] Figure 1 is a flow chart of a planetary gear reducer structure design method based on finite element analysis shown in an embodiment of the present application;

[0048] Figure 2 A typical stress distribution cloud in an embodiment of the present application Figure 1 ;

[0049] Figure 3 A typical stress distribution cloud in an embodiment of the present application Figure 2 ;

[0050] Figure 4 A schematic diagram of a constraint reaction force of a position constraint in an embodiment of the present application;

[0051] Figure 5 is a schematic diagram of a typical vibration form 1 in an embodiment of the present application;

[0052] Figure 6 is a schematic diagram of a typical vibration form 2 in an embodiment of the present application;

[0053] Figure 7 is a schematic diagram of a typical vibration form 3 in an embodiment of the present application;

[0054] Figure 8It is a schematic diagram of a typical position amplitude and phase angle frequency response curve in an embodiment of the present application;

[0055] Figure 9 It is a schematic diagram of a displacement-phase curve of a certain position in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0057] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show the layers related to the present invention rather than being drawn according to the number, shape and size of the layers in actual implementation. In actual implementation, the type, quantity and proportion of each layer may be changed arbitrarily, and the layer layout may also be more complicated.

[0058] In the following description, numerous details are discussed to provide a more thorough explanation of embodiments of the present invention; however, it is apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details.

[0059] Figure 1 FIG. 1 is a flow chart of a planetary gear reducer structure design method based on finite element analysis shown in an embodiment of the present application. Figure 1 As shown, a planetary gear reducer structure design method based on finite element analysis in this embodiment may include the following steps:

[0060] S110, based on testing the transmission efficiency, torque and vibration data of the current planetary gear reducer using a pre-built experimental platform;

[0061] Specifically, the testing process includes:

[0062] S111, build the experimental platform: first build the experimental platform and prepare the corresponding test equipment, such as transmission tester, torque sensor and high-speed camera. The experimental physical model adopts the scaled-down model of the planetary gear reducer.

[0063] S112, Experimental test: Use the experimental platform to measure the transmission efficiency, torque and vibration data of the planetary gear reducer, and record the key data to provide a basis for the verification of the simulation model.

[0064] S120, constructing a three-dimensional digital model of the current planetary gear reducer, and performing simulation analysis on the three-dimensional digital model to obtain simulation analysis data, wherein the simulation analysis includes static analysis, modal analysis, harmonic response and vibration analysis, and vibration characteristic analysis;

[0065] The construction process of the 3D digital model includes:

[0066] S1201, construct an initial digital model of the planetary gear reducer;

[0067] This application uses existing 3D model building tools, such as SolidWorks, to build a 3D digital model of the current planetary gear reducer. The model covers key components such as internal gears, sun gears, planetary gears and carriers.

[0068] S1202, performing finite element meshing on the initial digital model, and performing local encryption processing on the contact area between the gear and the bearing of the initial digital model to obtain an intermediate digital model;

[0069] The initial digital model was imported into the ANSYS tool, and finite element meshing was performed, using a hexahedron-based mesh structure, and local encryption was performed on the meshing area to improve the simulation accuracy.

[0070] S1203, setting material parameters of the intermediate digital model to obtain a three-dimensional digital model, wherein the material parameters include material properties, density, and elastic modulus.

[0071] Specifically, it includes material property settings, boundary conditions and solution settings.

[0072] Material property setting: In the simulation software, the gear material properties are set to alloy steel, and its density, elastic modulus, etc. are set according to the actual material parameters.

[0073] Boundary conditions and solution settings: Set the contact mode between gears, use the friction contact model, and set boundary conditions, including input speed and load, etc. In order to simulate the transmission characteristics under different working conditions, simulation calculations under different speeds and loads are also required.

[0074] In one embodiment of the present application, simulation analysis is performed on the three-dimensional digital model to obtain simulation analysis data, including:

[0075] S1211, performing static analysis on the three-dimensional digital model to obtain stress distribution data of the gear;

[0076] Static analysis performs static simulation of the gear transmission system to obtain the force distribution, displacement and stiffness analysis of the gear. Based on the simulation results, the strength of the gear material and the load bearing capacity of the reducer are evaluated.

[0077] Figure 2 A typical stress distribution cloud in an embodiment of the present application Figure 1 , Figure 3 A typical stress distribution cloud in an embodiment of the present application Figure 2 , Figure 4 FIG. 1 is a schematic diagram of a constraint reaction force of a position constraint in an embodiment of the present application. Part of the stress distribution data in the present application is as follows: Figures 2 - 4 shown.

[0078] S1212, dynamically analyzing the three-dimensional digital model to obtain a gear sliding ratio and a friction power loss of the gear;

[0079] S1213, performing thermal analysis on the three-dimensional digital model to obtain thermal analysis data of the gear;

[0080] S1214, performing contact mechanics analysis on the three-dimensional digital model to obtain contact force analysis data;

[0081] S1215, performing modal analysis on the three-dimensional digital model to obtain the natural frequency and vibration mode of the current planetary gear reducer;

[0082] Modal analysis is performed to determine the natural frequency and vibration mode of the reducer to ensure that the transmission system avoids resonance within the operating speed range. When the natural frequency of the transmission system is close to the external excitation frequency, resonance will occur, resulting in a significant increase in the amplitude, which may damage the components of the transmission system and affect its reliability and life. In order to avoid resonance, the modal frequency of the transmission system should be at least 15% higher than the excitation frequency corresponding to the critical speed.

[0083] Figure 5 is a schematic diagram of a typical vibration form 1 in an embodiment of the present application, Figure 6 is a schematic diagram of a typical vibration form 2 in an embodiment of the present application, Figure 7 Schematic diagram of a typical vibration form 3 in an embodiment of the present application. In the present application, three typical vibration forms caused by resonance are as follows: Figures 5 - 7 shown.

[0084] S1216, performing harmonic response and vibration analysis on the three-dimensional digital model to obtain the response frequency and response amplitude of the current planetary gear reducer when responding to various load excitation frequencies;

[0085] Step S1216 analyzes the response amplitude and frequency distribution of the gear system according to the harmonic response characteristics of the system, and evaluates the impact of different excitation frequencies on the transmission system, specifically including:

[0086] S12161, simulating a frequency response curve of the current planetary gear reducer under loads of multiple frequencies and sinusoidal variations, wherein the frequency response curve includes a corresponding relationship between displacement and frequency;

[0087] During the gear meshing process, the gear teeth will be subjected to impact loads, and the degree of damage to the gear teeth will be different under different load excitations. When the gear tooth structure is subjected to sinusoidal loads at different frequencies, the frequency response curves of stress and strain are obtained;

[0088] Figure 8 Schematic diagram of a typical position amplitude and phase angle frequency response curve in an embodiment of the present application. Figure 8 The relationship between amplitude (displacement) and frequency is shown in Figure 2.

[0089] S12162, finding a peak frequency from the stress-strain frequency response curve, and constructing a harmonic response motion equation based on the peak frequency, wherein the peak frequency and the response frequency;

[0090] It provides a reference for further research on gear characteristics. Harmonic response analysis is to calculate the response at several different frequencies during gear meshing, obtain a displacement versus frequency curve, find the peak value from the graph, and further analyze the stress value at this frequency.

[0091] Figure 9 is a schematic diagram of a displacement-phase curve of a certain position in an embodiment of the present application, Figure 9 The corresponding relationship between amplitude (displacement) and frequency phase is shown in Figure 1. The peak value can be extracted from it, so as to analyze the stress value at this frequency phase.

[0092] S12163, solving the harmonic response motion equation to obtain a steady-state response of the peak frequency, wherein the steady-state response is a response amplitude of the response frequency.

[0093] The modal superposition method is used to solve the harmonic response motion equation. The modal vibration shapes are superimposed from the modal analysis and the harmonic response equation is solved in the modal coordinate system.

[0094] S1217, performing vibration characteristic analysis on the three-dimensional digital model to obtain the vibration amplitude and acceleration of the current planetary gear reducer when responding to various load excitation frequencies.

[0095] Vibration characteristics analysis analyzes the vibration spectrum in the simulation results to obtain the vibration amplitude and acceleration of the system under different working conditions and determine whether the design requirements of the transmission system are met. Specifically, it includes:

[0096] S12171, analyzing the frequency components of the peak frequency and the amplitude of each frequency component to obtain the vibration amplitude of the current planetary gear reducer when responding to various load excitation frequencies;

[0097] The vibration amplitude is a direct indicator of the vibration intensity. By analyzing the vibration amplitude, the vibration level of the planetary reducer can be evaluated. According to the results of the harmonic response analysis, the vibration amplitude at different frequencies is evaluated. Check whether these amplitudes are within the design allowable range to ensure the safety and reliability of the structure. For each peak in the spectrum, analyze its corresponding frequency component and amplitude to identify the main vibration source and possible structural problems.

[0098] S12172, performing an inverse Fourier transform on the frequency response curve to obtain a time domain response curve, wherein the time domain response curve includes a corresponding relationship between displacement and time; and extracting acceleration from the time domain response curve.

[0099] The frequency domain data is converted back to the time domain through inverse Fourier transform (IFFT) to obtain the vibration response of the time history, which helps to further analyze the timing characteristics of the vibration.

[0100] S130, optimizing the structure of the current planetary gear reducer based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure;

[0101] By analyzing the stress distribution and vibration characteristics in the simulation results, optimization schemes for gear size, material selection and transmission structure are proposed, such as improving the tooth design or adding gear surface coating. The goal of optimizing gear size, material selection and transmission structure is to improve transmission efficiency, reduce vibration noise and extend service life. The optimization is based on data such as stress distribution, deformation, vibration frequency and amplitude analyzed by simulation.

[0102] The optimization in this application mainly includes gear size optimization, material optimization, surface treatment and transmission structure optimization, including:

[0103] (1) Gear size optimization

[0104] Local stress concentration during gear meshing is the main cause of fatigue failure. The optimization goal is to make stress distribution uniform and reduce stress concentration at the root of the tooth; to increase the contact ratio by adjusting the gear size, reduce impact load and vibration; and to optimize the tooth thickness to increase gear strength while maintaining gear efficiency. The specific plan is as follows:

[0105] (1-1) adjusting the modulus, adjusting the modulus of the gear in the current planetary gear reducer based on the stress distribution data of the gear to balance the gear strength and transmission accuracy;

[0106] Specifically, based on the data of tooth root stress and contact stress in the simulation, an appropriate modulus is selected. Increasing the gear modulus can improve the gear strength and is suitable for high-load transmission; reducing the modulus can improve the transmission accuracy and is suitable for light-load and high-speed scenarios.

[0107] (1-2) Changing the pressure angle: adjusting the pressure angle of the gear based on the gear sliding ratio and friction power loss of the gear to balance the sliding friction and the load-bearing capacity;

[0108] Specifically, the pressure angle is adjusted reasonably by analyzing the gear sliding ratio and friction power loss in the simulation. Increasing the pressure angle (such as adjusting from 20° to 25°) can reduce the root stress and improve the load-bearing capacity, but it will increase the sliding friction.

[0109] (1-3) Tooth profile modification: determining a target area where the impact load is greater than a preset threshold based on the response frequency and the response amplitude of the response frequency, and performing modification and optimization on the target area to reduce meshing impact.

[0110] Specifically, the area with large impact load is determined through harmonic response analysis and the shaping parameters are designed. Involute tooth profile modification, such as tooth top trimming and tooth root rounding, is adopted to reduce meshing impact.

[0111] (2) Material optimization

[0112] Material optimization is performed based on the maximum stress in the stress distribution data and the vibration amplitude, wherein the material optimization includes material selection and material surface hardening treatment.

[0113] Specifically, it includes: selecting materials with higher fatigue limits based on the maximum stress and vibration amplitude in the simulation. Selecting wear-resistant materials to reduce friction losses based on the contact stress and sliding ratio in the meshing area. Upgrading from ordinary carbon steel to low-alloy steel, such as 40Cr or 42CrMo, for high-strength requirements. In high-load transmission, using surface carburized and quenched steel to increase surface hardness.

[0114] (3) Surface treatment

[0115] Based on the thermal analysis data and the contact mechanics analysis data, the surface of the current planetary gear reducer is covered with a low friction coefficient coating, and the surface of the current planetary gear reducer is carburized and nitrided.

[0116] Specifically, it includes: determining the surface strengthening requirements through contact pressure and thermal analysis in simulation. Applying low friction coefficient coatings (such as DLC coatings) to reduce friction and wear. Carburizing and nitriding treatments to enhance the wear resistance and fatigue resistance of the gear surface.

[0117] (4) Transmission structure optimization

[0118] The distance between the axes of the gears is adjusted based on the response frequency to reduce the vibration amplitude.

[0119] Transmission structure optimization is based on the following principles:

[0120] Transmission smoothness: reduce vibration frequency amplitude and avoid resonance.

[0121] Gear clearance optimization: Maintain a reasonable meshing clearance to reduce gear meshing error. The optimization method is: adjust the distance between axes by the vibration response frequency in the simulation. Reduce the error of the center distance between gear axes to improve transmission efficiency. Increase the lubricating film thickness between gear pairs to reduce vibration amplitude.

[0122] S140, manufacturing a new planetary gear reducer based on the optimized planetary gear reducer structure, taking the new planetary gear reducer as the current planetary gear reducer, and returning to testing the transmission efficiency, torque and vibration data of the current planetary gear reducer based on the pre-built experimental platform until the transmission efficiency, the torque and the vibration data reach the preset optimization target; when the simulation analysis data reaches the preset optimization target, the target structure of the planetary gear reducer is obtained.

[0123] Finally, the optimized reducer model was made into a sample and repeated experimental tests were carried out to verify the effect of the optimized design in terms of transmission efficiency, vibration reduction and system stability. According to the degree of consistency between the experimental data and the simulation results, the model parameters were further adjusted to improve the design reliability.

[0124] After continuous iteration, the target structure obtained has the following advantages:

[0125] Performance improvement: The optimized planetary gear reducer has higher transmission efficiency, lower vibration and noise, and significantly improves system stability.

[0126] Shorten the R&D cycle: Replace a large number of experiments with simulation, saving time and cost while reducing the waste of raw materials.

[0127] Broad application prospects: The optimized reducer is suitable for various transmission equipment, effectively improving the equipment's operating efficiency and service life, and has a wide range of industrial application value.

[0128] The present invention provides a planetary gear reducer structure design method based on finite element analysis, which tests the planetary gear reducer to obtain current test data. Then, three-dimensional modeling and simulation analysis are performed, and the structure of the planetary gear reducer is optimized based on the simulation analysis. After the optimized planetary gear reducer structure is manufactured into a planetary gear reducer, it is tested again. With continuous iteration and optimization, the final planetary gear reducer structure can meet the use requirements in various scenarios. The reducer designed in this application is suitable for various types of transmission equipment, effectively improving the operating efficiency and service life of the equipment, and has a wide range of industrial application value.

[0129] The present application also provides a planetary gear reducer structure design system based on finite element analysis, comprising:

[0130] The test module is used to test the transmission efficiency, torque and vibration data of the current planetary gear reducer based on the pre-built experimental platform;

[0131] A simulation analysis module, used for constructing a three-dimensional digital model of the current planetary gear reducer, performing simulation analysis on the three-dimensional digital model, and obtaining simulation analysis data, wherein the simulation analysis includes static analysis, modal analysis, harmonic response and vibration analysis, and vibration characteristic analysis;

[0132] An optimization module, used for optimizing the structure of the current planetary gear reducer based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure;

[0133] An iteration module is used to manufacture a new planetary gear reducer based on the optimized planetary gear reducer structure, use the new planetary gear reducer as the current planetary gear reducer, and return to testing the transmission efficiency, torque and vibration data of the current planetary gear reducer based on a pre-built experimental platform until the transmission efficiency, the torque and the vibration data reach a preset optimization target; when the simulation analysis data reaches the preset optimization target, the target structure of the planetary gear reducer is obtained.

[0134] The present invention provides a planetary gear reducer structure design system based on finite element analysis, which obtains current test data by testing the planetary gear reducer. Then, three-dimensional modeling and simulation analysis are performed, and the structure of the planetary gear reducer is optimized based on the simulation analysis. After the optimized planetary gear reducer structure is manufactured into a planetary gear reducer, it is tested again. With continuous iteration and optimization, the final planetary gear reducer structure can meet the use requirements in various scenarios. The reducer designed in this application is suitable for various types of transmission equipment, effectively improving the operating efficiency and service life of the equipment, and has a wide range of industrial application value.

[0135] This embodiment also provides an electronic terminal, including: a processor and a memory;

[0136] The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the terminal executes any one of the methods in this embodiment.

[0137] The computer-readable storage medium in this embodiment can be understood by ordinary technicians in this field: all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to the computer program. The aforementioned computer program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

[0138] The electronic terminal provided in this embodiment includes a processor, a memory, a transceiver and a communication interface. The memory and the communication interface are connected to the processor and the transceiver and complete communication with each other. The memory is used to store computer programs, the communication interface is used to communicate, and the processor and the transceiver are used to run computer programs so that the electronic terminal executes each step of the above method.

[0139] In this embodiment, the memory may include a random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0140] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0141] In the above-mentioned embodiments, although the present invention has been described in conjunction with the specific embodiments of the present invention, many replacements, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. The embodiments of the present invention are intended to cover all such replacements, modifications and variations falling within the broad scope of the appended claims.

[0142] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A planetary gear reducer structural design method based on finite element analysis, characterized in that: Includes steps: Based on the use of a pre-built experimental platform to test the transmission efficiency, torque and vibration data of the current planetary gear reducer; Constructing a three-dimensional digital model of the current planetary gear reducer, and performing simulation analysis on the three-dimensional digital model to obtain simulation analysis data, wherein the simulation analysis includes static analysis, modal analysis, harmonic response and vibration analysis, and vibration characteristic analysis; Optimizing the structure of the current planetary gear reducer based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure; A new planetary gear reducer is manufactured based on the optimized planetary gear reducer structure, and the new planetary gear reducer is used as the current planetary gear reducer. The transmission efficiency, torque and vibration data of the current planetary gear reducer are tested based on the pre-built experimental platform until the transmission efficiency, the torque and the vibration data reach the preset optimization targets. When the simulation analysis data reaches the preset optimization targets, the target structure of the planetary gear reducer is obtained.

2. A planetary gear reducer structure design method based on finite element analysis according to claim 1, characterized in that: Construct a 3D digital model of the planetary gear reducer, including: Construct an initial digital model of the planetary gear reducer; Performing finite element meshing on the initial digital model, and performing local encryption processing on the contact area between the gear and the bearing of the initial digital model to obtain an intermediate digital model; The material parameters of the intermediate digital model are set to obtain a three-dimensional digital model, wherein the material parameters include material properties, density and elastic modulus.

3. The method for designing a planetary gear reducer structure based on finite element analysis according to claim 1, characterized in that: Performing simulation analysis on the three-dimensional digital model to obtain simulation analysis data includes: Performing static analysis on the three-dimensional digital model to obtain stress distribution data of the gear; Performing dynamic analysis on the three-dimensional digital model to obtain the gear slip ratio and friction power loss of the gear; Performing thermal analysis on the three-dimensional digital model to obtain thermal analysis data of the gear; Performing contact mechanics analysis on the three-dimensional digital model to obtain contact force analysis data; Performing modal analysis on the three-dimensional digital model to obtain the natural frequency and vibration mode of the current planetary gear reducer; Performing harmonic response and vibration analysis on the three-dimensional digital model to obtain the response frequency and response amplitude of the current planetary gear reducer when responding to various load excitation frequencies; The vibration characteristics of the three-dimensional digital model are analyzed to obtain the vibration amplitude and acceleration of the current planetary gear reducer when responding to various load excitation frequencies.

4. The method for designing a planetary gear reducer structure based on finite element analysis according to claim 3, characterized in that: The harmonic response and vibration analysis of the three-dimensional digital model are performed to obtain the response frequency and the response amplitude of the current planetary gear reducer when responding to various load excitation frequencies, including: Simulate the frequency response curve of the current planetary gear reducer under loads of multiple frequencies and sinusoidal variations, wherein the frequency response curve includes the corresponding relationship between displacement and frequency; Finding the peak frequency from the stress-strain frequency response curve, and constructing a harmonic response motion equation based on the peak frequency, wherein the peak frequency and the response frequency; The harmonic response motion equation is solved to obtain a steady-state response of the peak frequency, wherein the steady-state response is a response amplitude of the response frequency.

5. The method for designing a planetary gear reducer structure based on finite element analysis according to claim 4, characterized in that: The vibration characteristics of the three-dimensional digital model are analyzed to obtain the vibration amplitude and acceleration of the current planetary gear reducer when responding to various load excitation frequencies, including: Analyze the frequency components of the peak frequency and the amplitude of each frequency component to obtain the vibration amplitude of the current planetary gear reducer when responding to various load excitation frequencies; Performing inverse Fourier transform on the frequency response curve to obtain a time domain response curve, wherein the time domain response curve includes a corresponding relationship between displacement and time; and extracting acceleration from the time domain response curve.

6. The method for designing a planetary gear reducer structure based on finite element analysis according to claim 3, characterized in that: The structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including: Adjusting the module of the gear in the current planetary gear reducer based on the stress distribution data of the gear to balance the gear strength and transmission accuracy; adjusting a pressure angle of a gear based on a gear slip ratio and friction power loss of the gear to balance sliding friction and load carrying capacity; A target area where the impact load is greater than a preset threshold is determined based on the response frequency and the response amplitude of the response frequency, and the target area is optimized to reduce the meshing impact.

7. The method for designing a planetary gear reducer structure based on finite element analysis according to claim 3, characterized in that: The structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including: Material optimization is performed based on the maximum stress in the stress distribution data and the vibration amplitude, wherein the material optimization includes material selection and material surface hardening treatment.

8. The method for designing a planetary gear reducer structure based on finite element analysis according to claim 3, characterized in that: The structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including: Based on the thermal analysis data and the contact mechanics analysis data, the surface of the current planetary gear reducer is covered with a low friction coefficient coating, and the surface of the current planetary gear reducer is carburized and nitrided.

9. The method for designing a planetary gear reducer structure based on finite element analysis according to claim 3, characterized in that: The structure of the current planetary gear reducer is optimized based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure, including: The distance between the axes of the gears is adjusted based on the response frequency to reduce the vibration amplitude.

10. A planetary gear reducer structure design system based on finite element analysis, characterized in that: include: The test module is used to test the transmission efficiency, torque and vibration data of the current planetary gear reducer based on the pre-built experimental platform; A simulation analysis module, used for constructing a three-dimensional digital model of the current planetary gear reducer, performing simulation analysis on the three-dimensional digital model, and obtaining simulation analysis data, wherein the simulation analysis includes static analysis, modal analysis, harmonic response and vibration analysis, and vibration characteristic analysis; An optimization module, used for optimizing the structure of the current planetary gear reducer based on the simulation analysis data and the transmission efficiency, torque and vibration data of the current planetary gear reducer to obtain an optimized planetary gear reducer structure; An iteration module is used to manufacture a new planetary gear reducer based on the optimized planetary gear reducer structure, use the new planetary gear reducer as the current planetary gear reducer, and return to testing the transmission efficiency, torque and vibration data of the current planetary gear reducer based on a pre-built experimental platform until the transmission efficiency, the torque and the vibration data reach a preset optimization target; when the simulation analysis data reaches the preset optimization target, the target structure of the planetary gear reducer is obtained.

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