Method and system for adjusting vibration and noise reduction parameters in new energy automobile

Abstract

The invention discloses a method and system for adjusting vibration and noise reduction parameters in a new energy automobile, and the method comprises the steps: constructing a three-dimensional model of a speed reducer, carrying out the simulation of the three-dimensional model of the speed reducer, and obtaining original simulation data; obtaining gear transmission data in the three-dimensional model of the speed reducer, and carrying out shaping processing on the three-dimensional model of the speed reducer based on the gear transmission data; analyzing working state parameters of all parts in the three-dimensional model of the speed reducer after the modification treatment, and carrying out lubrication analysis treatment on the three-dimensional model of the speed reducer after the modification treatment; simulating the three-dimensional model of the speed reducer after lubrication analysis processing to obtain optimized simulation data; and carrying out optimization efficiency analysis on the original simulation data and the optimized simulation data. According to the method and system for adjusting the vibration and noise reduction parameters in the new energy automobile, through shaping treatment and lubrication analysis treatment, the transmission efficiency of the speed reducer is effectively improved, the operation energy consumption is reduced, and vibration reduction and noise reduction of the speed reducer are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a method and system for adjusting vibration and noise reduction parameters in a new energy vehicle. Background Art

[0002] In order to adapt to the mainstream trend of the times and its own long-term development, my country introduced the concept of sustainable development in the 1990s. With the progress of science and technology and the development of new energy in my country, various new industries and policies have emerged to support the strategy of sustainable development, and new energy vehicles are undoubtedly one of the most concerned related industries. The development of the new energy vehicle industry is crucial both in terms of technology and the environment. my country is gradually moving towards the world's cutting-edge new energy theory and technology, as well as the increasing number of new energy vehicles and charging infrastructure, which reflects that the new energy industry has become one of my country's main development goals at this stage.

[0003] At present, the power system of new energy vehicles is still in the technical breakthrough stage. As one of the core components of the power drive of new energy vehicles, reducers are widely used to cope with various complex road conditions to increase power and driving comfort. At present, new energy vehicles generally use single-speed two-stage transmission reducers without a speed change mechanism. This is because in the development process of multi-speed transmissions, the transmission efficiency is low, the operating energy consumption is too high, and the vibration and noise problems are more serious, resulting in the core technical problem of low reducer efficiency. There is no good solution. Therefore, how to improve the transmission efficiency of the reducer, reduce the operating energy consumption, and achieve vibration and noise reduction is the key to optimizing and improving the efficiency of the reducer. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a method and system for adjusting the vibration reduction and noise reduction parameters in new energy vehicles. Through shaping processing and lubrication analysis processing, the transmission efficiency of the reducer is effectively improved, the operating energy consumption is reduced, and the adjustment of the vibration reduction and noise reduction parameters is achieved.

[0005] The present invention provides a method for adjusting vibration reduction and noise reduction parameters in a new energy vehicle, the method comprising:

[0006] Constructing a three-dimensional model of the reducer, and simulating the three-dimensional model of the reducer to obtain original simulation data;

[0007] Acquiring gear transmission data in the three-dimensional model of the reducer, and performing a shape modification process on the three-dimensional model of the reducer based on the gear transmission data;

[0008] Analyze the working state parameters of each component inside the three-dimensional model of the reducer after the modification, and perform lubrication analysis on the three-dimensional model of the reducer after the modification;

[0009] Simulate the three-dimensional model of the reducer after lubrication analysis to obtain optimized simulation data;

[0010] An optimization efficiency analysis is performed on the original simulation data and the optimized simulation data.

[0011] Furthermore, the constructing of the three-dimensional model of the reducer, simulating the three-dimensional model of the reducer, and obtaining original simulation data include:

[0012] A three-dimensional model of the reducer is constructed based on the structural parameters, material parameters and working parameters of the reducer, and a simulation is performed to obtain a transmission efficiency value and NVH value of the three-dimensional model of the reducer.

[0013] Furthermore, the step of acquiring the gear transmission data in the three-dimensional model of the reducer and performing a modification process on the three-dimensional model of the reducer based on the gear transmission data includes:

[0014] Extracting gear transmission data from the three-dimensional model of the reducer, and constructing a three-dimensional model of the gearbox based on the gear transmission data;

[0015] Performing an initial simulation on the gearbox three-dimensional model to obtain an original contact analysis report of the gearbox three-dimensional model;

[0016] Analyzing the original contact analysis report, determining initial shaping parameters, and performing initial shaping simulation on the gearbox three-dimensional model based on the initial shaping parameters;

[0017] Performing gear dynamic performance analysis on the three-dimensional model of the gearbox after the initial shaping simulation, determining optimized shaping parameters, and performing optimized shaping simulation on the three-dimensional model of the gearbox based on the optimized shaping parameters;

[0018] Determine whether the gearbox three-dimensional model after optimization and modification simulation meets the transmission performance requirements.

[0019] Furthermore, extracting the gear transmission data from the three-dimensional model of the reducer and constructing the three-dimensional model of the gearbox based on the gear transmission data includes:

[0020] The gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data in the reducer three-dimensional model are extracted respectively, and the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data are combined and modeled according to the geometric combination parameters of the reducer three-dimensional model to generate a gearbox three-dimensional model.

[0021] Further, the initial simulation of the gearbox three-dimensional model to obtain an original contact analysis report of the gearbox three-dimensional model includes:

[0022] An initial simulation is performed on the gearbox three-dimensional model to obtain transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress parameters of the gearbox three-dimensional model.

[0023] Furthermore, analyzing the original contact analysis report to determine the initial shaping parameters includes:

[0024] According to the transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress distribution parameters of the gearbox three-dimensional model, combined with the original design parameters of the gearbox three-dimensional model, the gearbox modification range and the initial modification parameters of the tooth direction and tooth profile are generated.

[0025] Further, the initial shaping simulation of the gearbox three-dimensional model based on the initial shaping parameters includes:

[0026] The diagonal shaping method is used to perform initial shaping simulation on the gearbox three-dimensional model.

[0027] Furthermore, the determination of whether the three-dimensional model of the gearbox after the optimization and modification simulation meets the transmission performance requirements includes:

[0028] Analyzing the power loss difference of each component in the three-dimensional model of the gearbox after the optimization and modification simulation before and after the optimization and modification simulation, and establishing a power loss model based on the power loss difference;

[0029] Calculating the transmission error fluctuation value based on the power loss model and calculating the transmission efficiency;

[0030] Based on the comparison result between the transmission efficiency and the preset threshold, it is judged whether the three-dimensional model of the gearbox after the optimization and modification simulation meets the transmission performance requirements.

[0031] Furthermore, the analyzing the working state parameters of each component inside the three-dimensional model of the reducer after the modification and performing lubrication analysis on the three-dimensional model of the reducer after the modification includes:

[0032] A gearbox three-dimensional model generated by retaining the gear transmission data of the three-dimensional model of the reducer after the modification;

[0033] Planarize the three-dimensional model of the gearbox after the modification;

[0034] Extracting temperature influence parameters of the three-dimensional model of the gearbox after the modification, and constructing a steady-state temperature field model of the three-dimensional model of the gearbox after the modification based on the temperature influence parameters;

[0035] Inputting different lubricating oil quantity parameters into the steady-state temperature field model, and obtaining the simulated working temperatures corresponding to the different lubricating oil quantity parameters in the steady-state temperature field model after simulation;

[0036] According to the simulated working temperature matching corresponding transmission efficiency, an optimal lubricating oil quantity parameter is obtained;

[0037] Lubrication analysis is performed on the three-dimensional model of the speed reducer after the modification based on the optimal lubricating oil quantity parameter.

[0038] The present invention also provides a system for adjusting vibration reduction and noise reduction parameters in a new energy vehicle, the system for adjusting vibration reduction and noise reduction parameters in a new energy vehicle is used to implement the above-mentioned method for adjusting vibration reduction and noise reduction parameters in a new energy vehicle, and the system comprises:

[0039] A model building simulation module, wherein the model building simulation module is used to build a three-dimensional model of the reducer, and simulate the three-dimensional model of the reducer to obtain original simulation data;

[0040] A shaping processing module, the shaping processing module is used to obtain gear transmission data in the three-dimensional model of the reducer, and perform shaping processing on the three-dimensional model of the reducer based on the gear transmission data;

[0041] A lubrication processing module, wherein the lubrication analysis module is used to analyze the working state parameters of each component inside the three-dimensional model of the reducer after the modification processing, and perform lubrication analysis processing on the three-dimensional model of the reducer after the modification processing;

[0042] A model optimization simulation module, which is used to simulate the three-dimensional model of the reducer after lubrication analysis processing to obtain optimization simulation data;

[0043] A comparison and analysis module is used to perform optimization efficiency analysis on the original simulation data and the optimized simulation data.

[0044] The present invention provides a method and system for adjusting vibration reduction and noise reduction parameters in new energy vehicles. Through shaping processing, a three-dimensional model of a gearbox is constructed, the shaping range of the gearbox is determined, the tooth direction and tooth profile of the gearbox are shaped, and performance indicators such as transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress distribution parameters are used as the basis for reasonable optimization; and a diagonal shaping method is adopted. On the premise of not significantly reducing the neutrality and strength of the gear, a micro-shaping amount is used to approximately replace the diagonal shaping slope change amount, simplify the calculation process of the shaping parameters, and the shaping range is smaller, a larger effective bearing area of ​​the tooth surface is reserved, the tooth surface contact stress is reduced, the transmission error is reduced, and the transmission efficiency of the gear is effectively improved; the optimal lubricating oil quantity parameter is obtained through lubrication analysis processing, and the optimal lubrication performance is obtained with a reasonable lubricating oil quantity, which effectively improves the transmission efficiency of the reducer, reduces the operating energy consumption, and effectively reduces the NVH value of the reducer, and realizes vibration reduction and noise reduction of the reducer, which has certain application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 is a flow chart of a method for adjusting vibration and noise reduction parameters in a new energy vehicle in Embodiment 1 of the present invention;

[0047] Figure 2 is a flow chart of performing shape modification processing on the three-dimensional model of the reducer in the first embodiment of the present invention;

[0048] Figure 3 This is a flow chart of performing performance testing on a three-dimensional model of a gearbox after optimization and modification simulation in the first embodiment of the present invention;

[0049] Figure 4 is a flow chart of lubrication analysis processing for a three-dimensional model of a reducer in the first embodiment of the present invention;

[0050] Figure 5 It is a system architecture diagram for adjusting vibration and noise reduction parameters in a new energy vehicle in the second embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In the present invention, it should be understood that terms such as "include" or "have" are intended to indicate the existence of features, numbers, steps, behaviors, components, parts or a combination thereof disclosed in the specification, and are not intended to exclude the possibility that one or more other features, numbers, steps, behaviors, components, parts or a combination thereof exist or are added.

[0053] It should also be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] Embodiment 1

[0055] Embodiment 1 of the present invention provides a method for adjusting vibration reduction and noise reduction parameters in a new energy vehicle, the method comprising: constructing a three-dimensional model of a reducer, simulating the three-dimensional model of the reducer, and obtaining original simulation data; obtaining gear transmission data in the three-dimensional model of the reducer, and performing a reshaping process on the three-dimensional model of the reducer based on the gear transmission data; analyzing the working state parameters of each component inside the three-dimensional model of the reducer after the reshaping process, and performing a lubrication analysis process on the three-dimensional model of the reducer after the reshaping process; simulating the three-dimensional model of the reducer after the lubrication analysis process, and obtaining optimized simulation data; and performing an optimization efficiency analysis on the original simulation data and the optimized simulation data.

[0056] In an optional implementation of this embodiment, Figure 1 As shown, Figure 1 A flow chart of a method for adjusting vibration and noise reduction parameters in a new energy vehicle in Embodiment 1 of the present invention is shown, comprising the following steps:

[0057] S101, constructing a three-dimensional model of a reducer, and simulating the three-dimensional model of the reducer to obtain original simulation data;

[0058] In an optional implementation of the present embodiment, a three-dimensional model of the reducer is constructed based on the structural parameters, material parameters and operating parameters of the reducer, and a simulation is performed to obtain the transmission efficiency value and NVH value of the three-dimensional model of the reducer.

[0059] In an optional implementation of this embodiment, a three-dimensional model of the reducer is established in Romax Designer software according to actual structural parameters, actual material parameters and actual working parameters of the reducer.

[0060] In an optional implementation of the present embodiment, after the three-dimensional model of the reducer is constructed, the three-dimensional model of the reducer is simulated in software to obtain the original transmission efficiency and original NVH value of the three-dimensional model of the reducer.

[0061] It should be noted that the NVH is the noise, vibration and harshness (NVH), which is a comprehensive indicator to measure the manufacturing quality and ride comfort of the car. Unlike traditional fuel vehicles, new energy vehicles do not have engine noise such as startup and shutdown, exhaust fuel, etc., but have added components such as battery packs and motors, and the noise and NVH characteristics caused by this will change significantly. The factors affecting the NVH characteristics of new energy vehicles are mainly the vibration noise of the motor and reducer. Since the noise of the new energy vehicle drive motor is much smaller than that of the transmission reducer, the NVH value of the entire vehicle can be approximately obtained by analyzing the NVH of the reducer. In this embodiment, the NVH value is used as a vibration reduction and noise reduction parameter to measure the manufacturing quality and ride comfort of new energy vehicles.

[0062] S102, acquiring gear transmission data in the three-dimensional model of the reducer, and performing a shaping process on the three-dimensional model of the reducer based on the gear transmission data;

[0063] In an optional implementation of this embodiment, Figure 2 As shown, Figure 2 The flowchart of the modification process of the three-dimensional model of the reducer in the first embodiment of the present invention is shown, which includes the following steps:

[0064] S201, extracting gear transmission data from the three-dimensional model of the reducer, and constructing a three-dimensional model of the gearbox based on the gear transmission data;

[0065] In an optional implementation of the present embodiment, the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data in the three-dimensional model of the reducer are extracted respectively, and the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data are combined and modeled according to the geometric combination parameters of the three-dimensional model of the reducer to generate a three-dimensional model of the gearbox.

[0066] Specifically, the shaping processing of the reducer three-dimensional model is mainly performed on the gears in the reducer three-dimensional model. Here, the modeling data of the gearbox is extracted, mainly including the shell modeling data as the gearbox shell, and the gear modeling data, shaft modeling data and bearing modeling data as the internal component structure of the gearbox. Combined with the geometric combination parameters of the reducer three-dimensional model, the shell modeling data, gear modeling data, shaft modeling data and bearing modeling data are geometrically combined and modeled to construct the gearbox three-dimensional model.

[0067] S202, performing an initial simulation on the gearbox three-dimensional model to obtain an original contact analysis report of the gearbox three-dimensional model;

[0068] In an optional implementation of this embodiment, an initial simulation is performed on the gearbox three-dimensional model to obtain transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress parameters of the gearbox three-dimensional model.

[0069] Specifically, the original contact analysis report of the gearbox three-dimensional model mainly uses three performance indicators, namely, transmission error parameter, tooth surface load distribution parameter and tooth surface maximum contact stress parameter, as the main performance basis.

[0070] S203, analyzing the original contact analysis report, determining initial shaping parameters, and performing initial shaping simulation on the gearbox three-dimensional model based on the initial shaping parameters;

[0071] In an optional implementation of the present embodiment, the gearbox modification range and the initial modification parameters of the tooth direction and tooth profile are generated based on the transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress distribution parameters of the gearbox three-dimensional model and the original design parameters of the gearbox three-dimensional model.

[0072] Specifically, the three-dimensional model of the gearbox is a helical gear transmission model. Under given working conditions, the transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress distribution parameters are used as performance indicators. Combined with the original design parameters of the three-dimensional model of the gearbox, the gearbox modification range and the initial modification parameters of the tooth direction and tooth profile are generated.

[0073] In an optional implementation of this embodiment, a diagonal shaping method is used to perform an initial shaping simulation on the gearbox three-dimensional model.

[0074] Specifically, the existing gear shaping methods mainly adopt tooth profile and tooth direction shaping, but the gear contact line of the helical gear is not parallel to the theoretical axis. The use of tooth profile shaping and tooth direction shaping will reduce the actual contact line length of the helical gear, resulting in a significant reduction in the gear overlap, and the strength of the gear will also change. In this embodiment, a gear shaping method of diagonal shaping is adopted. Under the premise of not significantly reducing the neutrality and strength of the gear, an approximate replacement of the diagonal shaping amount is proposed, and the diagonal shaping slope change is approximately replaced by the micro-modification amount, which simplifies the calculation process of the shaping parameters. Only the meshing end and the meshing end of the tooth surface are modified, and the middle part is not modified or is modified less. Compared with the traditional shaping method, the cutting amount of diagonal shaping is smaller, the impact on the gear overlap and strength is also smaller, the shaping range is smaller, and a larger effective load-bearing area of ​​the tooth surface is retained, the tooth surface contact stress is reduced, the transmission error is reduced, and the transmission efficiency of the gear is effectively improved.

[0075] In an optional implementation of this embodiment, due to the uniqueness of the diagonal modification method, the traditional calculation formula is not used, and the modification parameters are expressed by the meshing data of the tooth surface. The calculation formula includes:

[0076]

[0077] Where M is the tooth surface meshing force function, α w is the pressure angle, H s is the sliding coefficient of the meshing end, H t is the sliding coefficient of the meshing end.

[0078] S204, performing gear dynamic performance analysis on the three-dimensional model of the gearbox after the initial shaping simulation, determining optimized shaping parameters, and performing optimized shaping simulation on the three-dimensional model of the gearbox based on the optimized shaping parameters;

[0079] In an optional implementation of the present embodiment, a gear dynamic performance analysis is performed on the gearbox three-dimensional model after the initial shaping simulation. Based on the analysis results, an optimization target is set in combination with the maximum contact stress of the tooth surface and the transmission error, the initial shaping parameters are optimized, optimized shaping parameters are generated, and the gearbox three-dimensional model is subjected to an optimization shaping simulation based on the optimized shaping parameters.

[0080] Specifically, the Monte Carlo method is used to generate the optimized modification parameters based on the dynamic performance analysis results of the gear combined with the maximum contact stress on the tooth surface and the transmission error to set the optimization target.

[0081] It should be noted that the diagonal shaping method is also used in the optimization shaping simulation.

[0082] S205: Determine whether the three-dimensional model of the gearbox after the optimization and modification simulation meets the transmission performance requirements.

[0083] In an optional implementation of this embodiment, whether the transmission performance requirement is met is determined by optimizing the transmission efficiency difference of the gearbox three-dimensional model before and after the shaping simulation.

[0084] Specifically, Figure 3 As shown, Figure 3 The flowchart of performing performance testing on the three-dimensional model of the gearbox after optimization and modification simulation in the first embodiment of the present invention is shown, comprising the following steps:

[0085] S301, analyzing the power loss difference of each component in the three-dimensional model of the gearbox after the optimization and modification simulation before and after the optimization and modification simulation, and establishing a power loss model based on the power loss difference;

[0086] In an optional implementation of this embodiment, the power loss difference of each component in the three-dimensional model of the gearbox after the optimization and modification simulation before and after the optimization and modification simulation is analyzed, and multiple power loss models such as bearing loss and gear meshing loss are established.

[0087] Specifically, in the calculation of gear transmission efficiency, gear power loss is mainly meshing loss. The calculation of meshing power loss needs to be combined with the gear meshing principle, which mainly includes rolling friction loss and sliding friction loss, among which sliding friction loss accounts for the main part. According to ISOTR14179-1 standard, gear meshing loss is a function of gear contact force and friction coefficient. There is sliding between tooth surfaces during gear meshing, and the meshing tooth surfaces are separated by a layer of oil film. The meshing efficiency is expressed as a function of sliding ratio and meshing friction coefficient. The calculation formulas for gear meshing loss include:

[0088]

[0089] Where P Mi is the meshing loss, f m is the meshing friction coefficient, T is the pinion torque, v is the pinion speed, β w is the helix angle, and M is the tooth surface meshing force function.

[0090] S302, calculating a transmission error fluctuation value based on the power loss model, and calculating a transmission efficiency;

[0091] In an optional implementation of this embodiment, the transmission error fluctuation value is calculated based on the calculated meshing loss value, and the transmission efficiency is calculated.

[0092] Specifically, the effect of the modification treatment on the gear meshing efficiency is considered. Since the gear tooth shape and the sliding distance during gear meshing have an impact on the gear meshing efficiency, and the difference between the actual meshing position of the gear and the theoretical meshing position is the transmission error fluctuation value, when performing transmission error analysis, it is assumed that the driven wheel does not slip, then the transmission error fluctuation value is the sum of the sliding distance of the driving wheel and the sliding distance of the driven wheel, and the sum of the sliding distance of the driving wheel and the sliding distance of the driven wheel can be calculated by the meshing loss value.

[0093] Furthermore, the transmission efficiency is the transmission ratio between the driving wheel and the driven wheel, that is, the ratio of the difference between the full efficiency transmission value and the transmission error fluctuation value to the full efficiency transmission value.

[0094] S303: judging whether the three-dimensional model of the gearbox after the optimization and modification simulation meets the transmission performance requirements based on the comparison result between the transmission efficiency and the preset threshold.

[0095] In an optional implementation of this embodiment, the transmission efficiency is compared with a preset threshold. If the transmission efficiency is greater than or equal to the preset threshold, it is judged that the three-dimensional model of the gearbox after the optimized shaping simulation meets the transmission performance requirements. If the transmission efficiency is less than the preset threshold, it is judged that the three-dimensional model of the gearbox after the optimized shaping simulation does not meet the transmission performance requirements.

[0096] In an optional implementation of the present embodiment, when it is determined that the three-dimensional model of the gearbox after the optimization and shaping simulation does not meet the transmission performance requirements, it is necessary to re-analyze the gear dynamic performance of the three-dimensional model of the gearbox after the optimization and shaping simulation, determine the optimization shaping parameters again, and perform the optimization and shaping simulation again. After multiple iterative optimizations, the three-dimensional model of the gearbox after the optimization and shaping simulation finally meets the transmission performance requirements.

[0097] Here, through shaping treatment, a three-dimensional model of the gearbox is constructed, the shaping range of the gearbox is determined, the tooth direction and tooth profile of the gearbox are modified, and reasonable optimization is carried out based on performance indicators such as transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress distribution parameters; and the diagonal shaping method is adopted. Under the premise of not significantly reducing the neutrality and strength of the gear, the micro-shaping amount is used to approximately replace the diagonal shaping slope change amount, simplify the calculation process of the shaping parameters, and the shaping range is smaller. A larger effective load-bearing area of ​​the tooth surface is retained, the tooth surface contact stress is reduced, the transmission error is reduced, and the transmission efficiency of the gear is effectively improved.

[0098] S103, analyzing the working state parameters of each component inside the three-dimensional model of the reducer after the modification, and performing lubrication analysis on the three-dimensional model of the reducer after the modification;

[0099] In an optional implementation of this embodiment, Figure 4 As shown, Figure 4 The flowchart of lubrication analysis processing of the three-dimensional model of the reducer in the first embodiment of the present invention is shown, including the following steps:

[0100] S401, retaining the gear transmission data of the three-dimensional model of the speed reducer after the modification process to generate a three-dimensional model of the gear box;

[0101] In an optional implementation of this embodiment, the gear transmission data in the three-dimensional model of the speed reducer after the modification process is retained, and the three-dimensional model of the gearbox after the modification process is constructed based on the gear transmission data after the modification process.

[0102] Specifically, the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data in the three-dimensional model of the reducer after the modification are extracted, and the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data after the modification are combined and modeled according to the geometric combination parameters of the three-dimensional model of the reducer after the modification to generate the three-dimensional model of the gearbox after the modification.

[0103] S402, performing planarization processing on the three-dimensional model of the gearbox after the modification processing;

[0104] In an optional implementation of this embodiment, since the internal structure of the reducer is relatively complex, when performing subsequent finite element analysis, the relatively complex structure will increase the difficulty of meshing and reduce the solution accuracy. Therefore, it is necessary to appropriately simplify the internal structure of the reducer within the allowable error range, so as to improve its simulation accuracy and reduce the simulation time.

[0105] Specifically, the main gear model, shaft model and bearing model of the internal components of the gearbox three-dimensional model after the shaping treatment are retained, and planarization is performed to simplify the more complex curved surfaces and reinforcement ribs inside and outside the reducer case into flat plates.

[0106] S403, extracting temperature influence parameters of the three-dimensional model of the gearbox after the modification, and constructing a steady-state temperature field model of the three-dimensional model of the gearbox after the modification based on the temperature influence parameters;

[0107] In an optional implementation of the present embodiment, the temperature influencing parameters of the gearbox three-dimensional model after the shaping treatment are extracted, and based on the macroscopic temperature calculation of the gearbox three-dimensional model, ANSYS software is used for analysis to construct a steady-state temperature field model of the gearbox three-dimensional model after the shaping treatment.

[0108] Specifically, the gear model, shaft model and bearing model are constructed using UG software, a file format recognizable by ANSYS software is generated, and the material properties of the gear model, shaft model and bearing model are set to construct a steady-state temperature field model of the gear model, shaft model and bearing model.

[0109] S404, inputting different lubricating oil quantity parameters into the steady-state temperature field model, and obtaining the simulated working temperatures corresponding to the different lubricating oil quantity parameters in the steady-state temperature field model after simulation;

[0110] In an optional implementation of the present embodiment, different lubricating oil quantity parameters are input into the steady-state temperature field model, and after simulation, the simulated working temperatures of the gear model, shaft model and bearing model in the steady-state temperature field model corresponding to different lubricating oil quantity parameters are obtained.

[0111] S405, obtaining an optimal lubricating oil quantity parameter according to the transmission efficiency corresponding to the simulated working temperature matching;

[0112] In an optional implementation of the present embodiment, the transmission efficiencies corresponding to the gear model, shaft model and bearing model at different simulated working temperatures are obtained respectively, and when the simulated working temperature corresponding to the highest transmission efficiency is extracted, the input lubricating oil quantity parameter is the optimal lubricating oil quantity parameter.

[0113] S406: Perform lubrication analysis on the three-dimensional model of the speed reducer after the modification based on the optimal lubricating oil quantity parameter.

[0114] In an optional implementation of the present embodiment, lubrication analysis processing is performed on the three-dimensional model of the reducer after the modification processing based on the acquired optimal lubricating oil quantity parameters to obtain the three-dimensional simulation model of the reducer after the lubrication analysis processing.

[0115] It should be noted that the working performance of electric vehicle reducers is not only related to their structural form, but also has a great relationship with the working state, temperature and lubrication effect of each component. The working temperature and lubrication effect of electric vehicle reducers play a vital role in their operating performance. During the high-speed operation of the gear system of the electric gas reducer, relative sliding will occur between a pair of meshing gears, resulting in frictional heat generation, and part of the heat will be dissipated into the oil-gas mixture in the form of thermal convection. The oil stirring loss caused by the gear stirring the lubricating oil will cause the lubricating oil temperature to rise rapidly and reach a stable state. The physical properties of lubricating oil, such as density, kinematic viscosity, and pressure-viscosity coefficient, are greatly affected by temperature. Its thermophysical properties will directly affect the oil stirring loss and meshing loss of the reducer gear system, and then affect the transmission efficiency of the entire transmission system. However, the amount of lubricating oil in the reducer will also directly affect the splash lubrication effect of the gear system, which will determine the heat dissipation effect of the gear and bearing surface. Studies have found that the lubricating oil temperature and the amount of lubricating oil have a great influence on the transmission efficiency of the reducer. If the amount of lubricating oil is large, the gear train and bearing surface of the reducer have better heat dissipation conditions and better lubrication effect, but the oil churning loss is large, especially in low temperature environment. However, a smaller amount of lubricating oil will reduce the oil churning loss of the gear train, but the poor lubrication effect will cause damage to the components in the reducer. Therefore, the amount of lubricating oil directly affects the transmission performance and life of the gear train. It can be seen that determining the optimal amount of lubricating oil in the electric vehicle reducer is particularly important for improving the comprehensive transmission performance of the reducer. In general, in order to meet the full lubrication conditions of electric vehicle reducers, the amount of lubricating oil in the reducer is relatively high. A larger amount of lubricating oil can form a better lubrication effect, but it will cause greater oil churning loss in low temperature environment. From the characteristics of oil churning loss, it can be seen that it is negatively correlated with the lubricating oil temperature and positively correlated with the oil immersion depth. Therefore, the target conditions for determining the optimal amount of lubricating oil in the reducer are: ① When the electric vehicle reducer works under high temperature and high load conditions, the maximum temperature does not exceed the design temperature of the reducer; ② When working under low temperature and low load conditions, it has a higher transmission efficiency. Since the oil churning loss of the reducer accounts for a large proportion of the total loss under low-negative and low-temperature conditions, and the oil churning loss is positively correlated with the oil immersion depth under no-load conditions, a smaller amount of lubricating oil under low-temperature and low-negative conditions helps to improve the transmission efficiency of the reducer. However, a smaller amount of lubricating oil will reduce the lubrication effect of the reducer, causing the surface temperature of the gear to be too high and the tooth surface to be bonded and damaged. Therefore, finding the optimal lubricating oil amount parameter is crucial to improving the efficiency of the reducer.

[0116] S104, simulating the three-dimensional model of the reducer after lubrication analysis processing to obtain optimized simulation data;

[0117] In an optional implementation of the present embodiment, the three-dimensional model of the reducer after the lubrication analysis processing is simulated in software to obtain the optimized transmission efficiency value and optimized NVH value of the three-dimensional model of the reducer after the lubrication analysis processing.

[0118] S105: performing optimization efficiency analysis on the original simulation data and the optimized simulation data.

[0119] In an optional implementation of this embodiment, an optimization efficiency analysis is performed on the original transmission efficiency value and the optimized transmission efficiency value, as well as the original NVH value and the optimized NVH value.

[0120] In summary, the first embodiment of the present invention provides a method for adjusting vibration reduction and noise reduction parameters in new energy vehicles. Through shaping processing, a three-dimensional model of the gearbox is constructed, the shaping range of the gearbox is determined, the tooth direction and tooth profile of the gearbox are shaped, and the transmission error parameter, tooth surface load distribution parameter and tooth surface maximum contact stress distribution parameter and other performance indicators are used as the basis for reasonable optimization; and the diagonal shaping method is adopted. On the premise of not significantly reducing the neutrality and strength of the gear, the micro-shaping amount is used to approximately replace the diagonal shaping slope change amount, simplify the calculation process of the shaping parameters, and the shaping range is smaller. A larger effective bearing area of ​​the tooth surface is retained, the tooth surface contact stress is reduced, the transmission error is reduced, and the transmission efficiency of the gear is effectively improved; the optimal lubricating oil quantity parameter is obtained through lubrication analysis processing, and the optimal lubrication performance is obtained with a reasonable lubricating oil quantity, which effectively improves the transmission efficiency of the reducer, reduces the operating energy consumption, and effectively reduces the NVH value of the reducer, and realizes vibration reduction and noise reduction of the reducer, which has certain application value.

[0121] Embodiment 2

[0122] Embodiment 2 of the present invention provides a system for adjusting vibration reduction and noise reduction parameters in new energy vehicles. The system for adjusting vibration reduction and noise reduction parameters in new energy vehicles is used to implement the method for adjusting vibration reduction and noise reduction parameters in new energy vehicles in embodiment 1. The system includes a model building simulation module, a shaping processing module, a lubrication processing module, a model optimization simulation module, and a comparison analysis module.

[0123] In an optional implementation of this embodiment, Figure 5 As shown, Figure 5 The system architecture diagram for adjusting vibration and noise reduction parameters in a new energy vehicle in the second embodiment of the present invention is shown, including the following modules:

[0124] A model building simulation module 10, wherein the model building simulation module 10 is used to build a three-dimensional model of the reducer, and simulate the three-dimensional model of the reducer to obtain original simulation data;

[0125] In an optional implementation of the present embodiment, the constructing of a three-dimensional model of the reducer, simulating the three-dimensional model of the reducer, and obtaining original simulation data include: constructing a three-dimensional model of the reducer based on the structural parameters, material parameters and operating parameters of the reducer, and simulating to obtain the transmission efficiency value and NVH value of the three-dimensional model of the reducer.

[0126] A shaping processing module 20, the shaping processing module 20 is used to obtain gear transmission data in the three-dimensional model of the reducer, and perform shaping processing on the three-dimensional model of the reducer based on the gear transmission data;

[0127] In an optional implementation of the present embodiment, the obtaining of the gear transmission data in the three-dimensional model of the reducer and the shaping of the three-dimensional model of the reducer based on the gear transmission data include: extracting the gear transmission data in the three-dimensional model of the reducer and constructing a three-dimensional model of a gearbox based on the gear transmission data; performing an initial simulation on the three-dimensional model of the gearbox to obtain an original contact analysis report of the three-dimensional model of the gearbox; analyzing the original contact analysis report to determine initial shaping parameters, and performing an initial shaping simulation on the three-dimensional model of the gearbox based on the initial shaping parameters; performing a gear dynamic performance analysis on the three-dimensional model of the gearbox after the initial shaping simulation to determine the optimized shaping parameters, and performing an optimized shaping simulation on the three-dimensional model of the gearbox based on the optimized shaping parameters; and judging whether the three-dimensional model of the gearbox after the optimized shaping simulation meets the transmission performance requirements.

[0128] In an optional implementation of the present embodiment, the extracting the gear transmission data from the three-dimensional model of the reducer and constructing a three-dimensional model of the gearbox based on the gear transmission data includes: respectively extracting the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data from the three-dimensional model of the reducer, and combining and modeling the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data according to the geometric combination parameters of the three-dimensional model of the reducer to generate a three-dimensional model of the gearbox.

[0129] In an optional implementation of the present embodiment, the initial simulation of the gearbox three-dimensional model and obtaining the original contact analysis report of the gearbox three-dimensional model includes: performing an initial simulation of the gearbox three-dimensional model to obtain the transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress parameters of the gearbox three-dimensional model.

[0130] In an optional implementation of the present embodiment, analyzing the original contact analysis report and determining the initial shaping parameters includes: generating a shaping range of the gearbox and initial shaping parameters of the tooth direction and tooth profile based on the transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress distribution parameters of the gearbox three-dimensional model in combination with the original design parameters of the gearbox three-dimensional model.

[0131] In an optional implementation of this embodiment, the performing initial shaping simulation on the gearbox three-dimensional model based on the initial shaping parameters includes: performing initial shaping simulation on the gearbox three-dimensional model using a diagonal shaping method.

[0132] In an optional implementation of the present embodiment, the determination of whether the three-dimensional model of the gearbox after the optimization and shaping simulation meets the transmission performance requirements includes: analyzing the power loss difference of each component in the three-dimensional model of the gearbox after the optimization and shaping simulation before and after the optimization and shaping simulation, and establishing a power loss model based on the power loss difference; calculating the transmission error fluctuation value based on the power loss model, and calculating the transmission efficiency; and determining whether the three-dimensional model of the gearbox after the optimization and shaping simulation meets the transmission performance requirements based on the comparison result of the transmission efficiency with a preset threshold.

[0133] A lubrication processing module 30, wherein the lubrication analysis module 30 is used to analyze the working state parameters of each component inside the three-dimensional model of the reducer after the modification, and to perform lubrication analysis processing on the three-dimensional model of the reducer after the modification;

[0134] In an optional implementation of the present embodiment, the analysis of the working state parameters of each component inside the three-dimensional model of the reducer after the shaping process and the lubrication analysis processing of the three-dimensional model of the reducer after the shaping process include: retaining the gearbox three-dimensional model generated by the gear transmission data of the three-dimensional model of the reducer after the shaping process; planarizing the three-dimensional model of the gearbox after the shaping process; extracting the temperature influence parameters of the three-dimensional model of the gearbox after the shaping process, and constructing a steady-state temperature field model of the three-dimensional model of the gearbox after the shaping process based on the temperature influence parameters; inputting different lubricating oil quantity parameters into the steady-state temperature field model, and obtaining the simulated working temperatures corresponding to different lubricating oil quantity parameters in the steady-state temperature field model after simulation; matching the corresponding transmission efficiency according to the simulated working temperature to obtain the optimal lubricating oil quantity parameter; and performing lubrication analysis processing on the three-dimensional model of the reducer after the shaping process based on the optimal lubricating oil quantity parameter.

[0135] A model optimization simulation module 40, which is used to simulate the three-dimensional model of the reducer after lubrication analysis processing to obtain optimization simulation data;

[0136] The comparison and analysis module 50 is used to perform optimization efficiency analysis on the original simulation data and the optimized simulation data.

[0137] In summary, the second embodiment of the present invention provides a system for adjusting vibration reduction and noise reduction parameters in new energy vehicles, which is used to implement the method for adjusting vibration reduction and noise reduction parameters in new energy vehicles in the first embodiment. Through shaping processing, a three-dimensional model of the gearbox is constructed, the shaping range of the gearbox is determined, and the tooth direction and tooth profile of the gearbox are shaped. The transmission error parameter, the tooth surface load distribution parameter, and the tooth surface maximum contact stress distribution parameter are used as the basis for reasonable optimization; and the diagonal shaping method is adopted. On the premise of not significantly reducing the neutrality and strength of the gear, the micro-shaping amount is used to approximately replace the diagonal shaping slope change amount, simplify the calculation process of the shaping parameters, and the shaping range is smaller. A larger effective bearing area of ​​the tooth surface is reserved, the tooth surface contact stress is reduced, the transmission error is reduced, and the transmission efficiency of the gear is effectively improved; the optimal lubricating oil quantity parameter is obtained through lubrication analysis processing, and the optimal lubrication performance is obtained with a reasonable lubricating oil quantity, which effectively improves the transmission efficiency of the reducer, reduces the operating energy consumption, and effectively reduces the NVH value of the reducer, and realizes vibration reduction and noise reduction of the reducer, which has certain application value.

[0138] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0139] In addition, the embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for adjusting vibration and noise reduction parameters in a new energy vehicle, characterized in that: The method comprises: Constructing a three-dimensional model of the reducer, and simulating the three-dimensional model of the reducer to obtain original simulation data; Acquiring gear transmission data in the three-dimensional model of the reducer, and performing a shape modification process on the three-dimensional model of the reducer based on the gear transmission data; Analyze the working state parameters of each component inside the three-dimensional model of the reducer after the modification, and perform lubrication analysis on the three-dimensional model of the reducer after the modification; Simulate the three-dimensional model of the reducer after lubrication analysis to obtain optimized simulation data; An optimization efficiency analysis is performed on the original simulation data and the optimized simulation data.

2. The method for adjusting vibration and noise reduction parameters in a new energy vehicle according to claim 1, characterized in that: The constructing of the three-dimensional model of the reducer, simulating the three-dimensional model of the reducer, and obtaining original simulation data include: A three-dimensional model of the reducer is constructed based on the structural parameters, material parameters and working parameters of the reducer, and a simulation is performed to obtain a transmission efficiency value and NVH value of the three-dimensional model of the reducer.

3. The method for adjusting vibration and noise reduction parameters in a new energy vehicle according to claim 1, characterized in that: The step of acquiring the gear transmission data in the three-dimensional model of the reducer and performing a reshaping process on the three-dimensional model of the reducer based on the gear transmission data comprises: Extracting gear transmission data from the three-dimensional model of the reducer, and constructing a three-dimensional model of the gearbox based on the gear transmission data; Performing an initial simulation on the gearbox three-dimensional model to obtain an original contact analysis report of the gearbox three-dimensional model; Analyzing the original contact analysis report, determining initial shaping parameters, and performing initial shaping simulation on the gearbox three-dimensional model based on the initial shaping parameters; Performing gear dynamic performance analysis on the three-dimensional model of the gearbox after the initial shaping simulation, determining optimized shaping parameters, and performing optimized shaping simulation on the three-dimensional model of the gearbox based on the optimized shaping parameters; Determine whether the gearbox three-dimensional model after optimization and modification simulation meets the transmission performance requirements.

4. The method for adjusting vibration and noise reduction parameters in a new energy vehicle according to claim 3, characterized in that: The extracting the gear transmission data in the three-dimensional model of the reducer and constructing the three-dimensional model of the gearbox based on the gear transmission data comprises: The gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data in the reducer three-dimensional model are extracted respectively, and the gearbox housing modeling data, gear modeling data, shaft modeling data and bearing modeling data are combined and modeled according to the geometric combination parameters of the reducer three-dimensional model to generate a gearbox three-dimensional model.

5. The method for adjusting vibration and noise reduction parameters in a new energy vehicle according to claim 3, characterized in that: The initial simulation of the gearbox three-dimensional model to obtain an original contact analysis report of the gearbox three-dimensional model includes: An initial simulation is performed on the gearbox three-dimensional model to obtain transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress parameters of the gearbox three-dimensional model.

6. The method for adjusting vibration and noise reduction parameters in a new energy vehicle according to claim 5, characterized in that: The analyzing the original contact analysis report and determining the initial modification parameters comprises: According to the transmission error parameters, tooth surface load distribution parameters and tooth surface maximum contact stress distribution parameters of the gearbox three-dimensional model, combined with the original design parameters of the gearbox three-dimensional model, the gearbox modification range and the initial modification parameters of the tooth direction and tooth profile are generated.

7. The method for adjusting vibration and noise reduction parameters in a new energy vehicle according to claim 4, characterized in that: The performing initial shaping simulation on the gearbox three-dimensional model based on the initial shaping parameters comprises: The diagonal shaping method is used to perform initial shaping simulation on the gearbox three-dimensional model.

8. The method for adjusting vibration and noise reduction parameters in a new energy vehicle as claimed in claim 3, characterized in that: The determination of whether the three-dimensional model of the gearbox after the optimization and modification simulation meets the transmission performance requirements includes: Analyzing the power loss difference of each component in the three-dimensional model of the gearbox after the optimization and modification simulation before and after the optimization and modification simulation, and establishing a power loss model based on the power loss difference; Calculating the transmission error fluctuation value based on the power loss model and calculating the transmission efficiency; Based on the comparison result between the transmission efficiency and the preset threshold, it is judged whether the three-dimensional model of the gearbox after the optimization and modification simulation meets the transmission performance requirements.

9. The method for adjusting vibration and noise reduction parameters in a new energy vehicle according to claim 3, characterized in that: The analyzing the working state parameters of each component inside the three-dimensional model of the reducer after the modification and performing lubrication analysis on the three-dimensional model of the reducer after the modification includes: A gearbox three-dimensional model generated by retaining the gear transmission data of the three-dimensional model of the reducer after the modification; Planarize the three-dimensional model of the gearbox after the modification; Extracting temperature influence parameters of the three-dimensional model of the gearbox after the modification, and constructing a steady-state temperature field model of the three-dimensional model of the gearbox after the modification based on the temperature influence parameters; Inputting different lubricating oil quantity parameters into the steady-state temperature field model, and obtaining the simulated working temperatures corresponding to the different lubricating oil quantity parameters in the steady-state temperature field model after simulation; According to the simulated working temperature matching corresponding transmission efficiency, an optimal lubricating oil quantity parameter is obtained; Lubrication analysis is performed on the three-dimensional model of the speed reducer after the modification based on the optimal lubricating oil quantity parameter.

10. A system for adjusting vibration and noise reduction parameters in new energy vehicles, characterized in that: The system for adjusting vibration reduction and noise reduction parameters in a new energy vehicle is used to implement the method for adjusting vibration reduction and noise reduction parameters in a new energy vehicle according to any one of claims 1 to 9, and the system comprises: A model building simulation module, wherein the model building simulation module is used to build a three-dimensional model of the reducer, and simulate the three-dimensional model of the reducer to obtain original simulation data; A shaping processing module, the shaping processing module is used to obtain gear transmission data in the three-dimensional model of the reducer, and perform shaping processing on the three-dimensional model of the reducer based on the gear transmission data; A lubrication processing module, wherein the lubrication analysis module is used to analyze the working state parameters of each component inside the three-dimensional model of the reducer after the modification processing, and perform lubrication analysis processing on the three-dimensional model of the reducer after the modification processing; A model optimization simulation module, which is used to simulate the three-dimensional model of the reducer after lubrication analysis processing to obtain optimization simulation data; A comparison and analysis module is used to perform optimization efficiency analysis on the original simulation data and the optimized simulation data.

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