Method and device for optimizing high-speed gear transmission splash lubrication at low temperature

Abstract

The invention provides a low-temperature high-speed gear transmission splash lubrication optimization method and device, and relates to the technical field of splash lubrication.According to the method, a gear splash lubrication model under the low-temperature working condition is established through a computational fluid mechanics method, and the influence rule of factors such as the gear rotating speed and the oil immersion depth on lubrication characteristics is deeply analyzed; the invention further provides a novel bionic structure baffle. Through optimization design, the baffle can remarkably improve the distribution efficiency of lubricating oil on the surface of the gear, and effectively reduce torque loss. The optimized baffle structure shows excellent lubricating performance under the low-temperature and high-speed working conditions, an efficient lubricating solution is provided for a gear transmission system in the related field, and remarkable engineering application value is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of splash lubrication, and particularly to an optimization method and device for splash lubrication of high-speed gear transmission at low temperatures. Background Art

[0002] Currently, in modern industry, the gear transmission system is a core component of many mechanical devices, and its lubrication performance directly affects the operating efficiency and reliability of the devices. With the development of technology, the application of gear transmission systems in extreme environments is increasing, especially under low-temperature conditions; however, the low-temperature environment can lead to an increase in the viscosity of the lubricating oil and a decrease in fluidity, thereby affecting the lubrication effect of the gears and even causing damage, posing potential risks to the safety and reliability of the devices.

[0003] Traditional lubrication theories and methods mainly focus on the research of gear transmission systems under normal temperature conditions and cannot effectively solve the lubrication problems under low-temperature environments. In addition, the high-speed operation of gears at low temperatures makes the lubrication characteristics more complex, easily leading to lubrication failure and equipment failures. Therefore, it is of great significance to develop lubrication technologies applicable to high-speed gear transmission under low-temperature environments.

[0004] Currently, the lubrication methods of gear transmission mainly include active lubrication and passive lubrication. Although active lubrication can improve lubrication efficiency, its complexity and reliability issues limit its application in some fields, such as the aerospace field. Passive lubrication, especially splash lubrication, is widely used due to its simplicity and reliability, but its performance under low-temperature and high-speed conditions still needs to be further optimized. In addition, the existing baffle designs have limited improvement on the lubrication effect and cannot effectively solve the lubrication problems under low-temperature conditions. Therefore, studying the splash lubrication characteristics of high-speed gears under low-temperature conditions and optimizing the baffle structure to improve the lubrication effect are technical problems that need to be solved urgently.

[0005] In view of this, the present application is proposed. Summary of the Invention

[0006] The present invention provides an optimization method and device for splash lubrication of high-speed gear transmission at low temperatures, which can at least partially improve the above problems.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] An optimization method for splash lubrication of high-speed gear transmission at low temperatures, which includes:

[0009] Obtain the parameter information of the high-speed gear to be optimized, and perform simulation processing on the parameter information using a preset numerical analysis model to generate a high-speed gearbox simulation model;

[0010] According to the preset experimental conditions, a simulation experiment is carried out on the high-speed gearbox simulation model to generate simulation experiment results, and the simulation experiment results are analyzed to generate analysis data;

[0011] Based on the analysis data, a set of oil baffle modules are added to the high-speed gearbox simulation model, and the oil baffle modules are optimized;

[0012] The optimized oil baffle modules are installed on both sides of the high-speed gears to be optimized, and the optimization process is ended.

[0013] The present invention also provides an optimized device for splash lubrication of high-speed gear transmission at low temperature, which includes:

[0014] A simulation unit, configured to obtain parameter information of a high-speed gear to be optimized, and perform simulation processing on the parameter information by using a preset numerical analysis model to generate a high-speed gearbox simulation model;

[0015] An analysis unit, configured to carry out a simulation experiment on the high-speed gearbox simulation model according to the preset experimental conditions to generate simulation experiment results, and analyze the simulation experiment results to generate analysis data;

[0016] An optimization unit, configured to add a set of oil baffle modules to the high-speed gearbox simulation model based on the analysis data, and optimize the oil baffle modules;

[0017] An installation unit, configured to install the optimized oil baffle modules on both sides of the high-speed gears to be optimized, and end the optimization process.

[0018] In summary, the optimized method for splash lubrication of high-speed gear transmission at low temperature analyzes the distribution characteristics of lubricating oil in a low-temperature environment and its influence on the lubrication effect by establishing a two-phase flow analysis model for splash lubrication of high-speed gear transmission. The analysis finds that the volume fraction of lubricating oil on the tooth surface decreases with the increase of gear speed and increases with the increase of oil immersion depth, while the torque loss is mainly affected by the speed. Based on this, a bionic honeycomb baffle structure is proposed, and its structural parameters are optimized by using a multi-island genetic algorithm. The optimized baffle structure significantly increases the average volume fraction of lubricating oil on the tooth surface under the same working conditions, improving the lubrication effect. The optimized method for splash lubrication of high-speed gear transmission at low temperature provides a theoretical basis and practical application scheme for the lubrication optimization design of high-speed gear transmission under low-temperature conditions, effectively improving the lubrication performance in a low-temperature environment, reducing the torque loss, and increasing the reliability and efficiency of the transmission system. Description of the Drawings

[0019] Figure 1 is a flow schematic diagram of the optimized method for splash lubrication of high-speed gear transmission at low temperature provided by the first embodiment of the present invention;

[0020] Figure 2 It is a two-dimensional schematic diagram of the splash lubrication model provided by the embodiment of the present invention;

[0021] Figure 3 It is a three-dimensional model schematic diagram of the splash lubrication provided by the embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the computational domain and mesh provided by the embodiment of the present invention;

[0023] Figure 5 It is a comparison diagram of simulation and experiment provided by the embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the oil and gas distribution during the high-speed gear splash lubrication process provided by the embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of the velocity field distribution during the gear splash lubrication process provided by the embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the lubricating oil volume fraction during the splash lubrication process provided by the embodiment of the present invention;

[0027] Figure 9 It is a schematic diagram of the variation law of the lubricating oil volume fraction with the gear rotation speed provided by the embodiment of the present invention;

[0028] Figure 10 It is a schematic diagram of the variation law of the lubricating oil volume fraction with the immersion depth provided by the embodiment of the present invention;

[0029] Figure 11 It is a schematic diagram of the torque loss during the splash lubrication process provided by the embodiment of the present invention;

[0030] Figure 12 It is a schematic diagram of the variation law of the torque loss with the gear rotation speed provided by the embodiment of the present invention;

[0031] Figure 13 It is a schematic diagram of the variation law of the torque loss with the immersion depth provided by the embodiment of the present invention;

[0032] Figure 14 It is a schematic diagram of the bionic honeycomb baffle structure provided by the embodiment of the present invention;

[0033] Figure 15 It is a schematic diagram of the position of the bionic honeycomb baffle provided by the embodiment of the present invention;

[0034] Figure 16 It is a schematic diagram of the optimization process of the honeycomb baffle provided by the embodiment of the present invention;

[0035] Figure 17It is the design variable size diagram of the bionic honeycomb baffle provided by the embodiment of the present invention;

[0036] Figure 18 It is the Pareto diagram of the average volume fraction of lubricating oil provided by the embodiment of the present invention;

[0037] Figure 19 It is the relationship diagram between the actual value and the predicted value of the average volume fraction provided by the embodiment of the present invention;

[0038] Figure 20 It is the iteration curve diagram in the optimization process provided by the embodiment of the present invention;

[0039] Figure 21 It is the two-phase flow distribution diagram of splash lubrication of high-speed gears provided by the embodiment of the present invention;

[0040] Figure 22 It is the oil volume fraction nephogram of the gear and the axial section provided by the embodiment of the present invention;

[0041] Figure 23 It is the module schematic diagram of the splash lubrication optimization device for high-speed gear transmission at low temperature provided by the second embodiment of the present invention. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] Refer to Figures 1 to 4 , as shown, the first embodiment of the present invention discloses a method for optimizing splash lubrication of high-speed gear transmission at low temperature, which can be executed by a splash lubrication optimization device for high-speed gear transmission at low temperature (hereinafter referred to as the optimization device), and particularly, by one or more processors in the optimization device to implement the following method:

[0044] S1. Obtain the parameter information of the high-speed gear to be optimized, and perform simulation processing on the parameter information by using a preset numerical analysis model to generate a high-speed gearbox simulation model;

[0045] Specifically, step S1 includes: based on preset boundary conditions, simulate and generate a three-dimensional splash lubrication model as the initial model, the hardware structure of the initial model is consistent with that of the high-speed gearbox simulation model, and the fluid domain is discretized and divided into multiple grids, where the fluid domain is the area inside the box of the initial model except for the driving wheel and the driven wheel of the initial model;

[0046] The moving mesh technology is used to reconstruct the meshes around the driving wheel and the driven wheel of the initial model. At the same time, the tooth surface movement method is used to process the meshing area between the driving wheel and the driven wheel of the initial model;

[0047] The initial model is processed by tetrahedral unstructured mesh division, and the surface meshes of the gears of the initial model are encrypted to generate a high-speed gearbox simulation model.

[0048] Preferably, the numerical analysis model includes a control equation set, a VOF multiphase flow model, a turbulence model, and a moving mesh technology. Among them, the control equation set includes a mass conservation equation, a momentum conservation equation, and an energy conservation equation.

[0049] Preferably, the high-speed gearbox simulation model includes a box body, as well as a driving wheel and a driven wheel arranged inside the box body, and the driving wheel and the driven wheel are meshed and connected.

[0050] In this embodiment, first, parameter information of the high-speed gear transmission system to be optimized needs to be obtained. These parameters include the number of teeth, module, pressure angle, tooth width of the gears, and the size of the gearbox, etc. These parameters are the basis for the subsequent establishment and optimization of the simulation model. Based on these parameter information, a preset numerical analysis model is used for simulation processing to generate a high-speed gearbox simulation model. This process is a key step in realizing the optimized design.

[0051] Specifically, first, a three-dimensional model of splash lubrication is simulated and generated as an initial model based on preset boundary conditions. The hardware structure of this initial model is the same as that of the high-speed gearbox simulation model, including main components such as a box body, a driving wheel, and a driven wheel, where the driving wheel and the driven wheel are meshed and connected. In this initial model, the fluid domain is defined as the area inside the box body except for the driving wheel and the driven wheel. For numerical simulation, the fluid domain needs to be discretized and divided into multiple meshes. This process not only provides a basis for subsequent simulation calculations but also improves the calculation accuracy and efficiency through reasonable mesh division.

[0052] During the mesh division process, the moving mesh technology is used to reconstruct the meshes around the driving wheel and the driven wheel of the initial model. Since the gears will rotate and mesh during operation, the moving mesh technology can automatically adjust the calculation meshes according to the changes in the flow field, effectively capturing the dynamic characteristics in the flow, so as to ensure that the influence of gear movement on the flow field can be accurately reflected during the simulation. At the same time, in order to process the meshing area between the driving wheel and the driven wheel, the tooth surface movement method is used to process this area. This method can effectively avoid mesh distortion caused by gear meshing and ensure the stability and convergence of the calculation process.

[0053] Furthermore, tetrahedral unstructured mesh division is performed on the initial model, and surface mesh refinement is carried out on the gears. Tetrahedral unstructured mesh division can adapt to complex geometries, improving the quality and adaptability of the mesh. And surface mesh refinement on the gears can more accurately capture the flow details on the gear surface, thereby improving the accuracy of the simulation results. Through the above steps, a simulation model of the high-speed gearbox for subsequent analysis and optimization is finally generated.

[0054] In terms of the numerical analysis model, in this embodiment, a comprehensive model including a control equation set, a VOF multiphase flow model, a turbulence model, and a dynamic mesh technology is adopted. Among them, the control equation set covers the mass conservation equation, the momentum conservation equation, and the energy conservation equation, which are the basic physical laws describing fluid flow and heat transfer processes. The VOF multiphase flow model is used to accurately track the position and shape of the two-phase interface between lubricating oil and air, which is crucial for describing the distribution of lubricating oil during the splash lubrication process. The turbulence model is used to simulate the complex turbulence characteristics inside the gearbox to ensure that the simulation results can truly reflect the actual working conditions. The application of the dynamic mesh technology further enhances the adaptability of the model to dynamic processes.

[0055] Please refer to Figures 5 to 13 , S2, according to the preset experimental conditions, perform a simulation experiment on the high-speed gearbox simulation model, generate simulation experiment results, and analyze the simulation experiment results to generate analysis data;

[0056] Specifically, step S2 includes: analyzing the lubrication characteristics of high-speed gears at low temperature for the simulation experiment results, where the analysis includes: verifying the flow field distribution of the high-speed gearbox simulation model and analyzing the splash lubrication process of the gears at low temperature;

[0057] Analyze the influence of lubrication parameters on lubrication characteristics at low temperature for the simulation experiment results, and analyze the transmission torque loss of high-speed gears at low temperature for the simulation experiment results to generate analysis data.

[0058] Preferably, the analysis data includes that during the splash lubrication process of high-speed gear transmission under low-temperature working conditions, the volume fraction of lubricating oil on the tooth surface decreases with the increase of gear speed, while it increases with the increase of the oil immersion depth, and the torque loss increases with the increase of gear speed and oil immersion depth, where the influence of speed on torque loss is much greater than that of the oil immersion depth.

[0059] In this embodiment, the main objective of step S2 is to deeply analyze the lubrication characteristics of high-speed gear transmission under low-temperature working conditions through experimental simulation of the simulation model and generate detailed analysis data to provide theoretical support for subsequent optimization design.

[0060] First, the high-speed gearbox simulation model is simulated according to the preset experimental conditions. These experimental conditions include but are not limited to key parameters such as low temperature environment setting (such as -20°C), gear speed range (such as 3000r / min to 19200r / min), and oil immersion depth (such as 10mm to 30mm). By accurately setting these conditions in the simulation environment, it is ensured that the simulation experiment can truly reflect the lubrication behavior under actual working conditions.

[0061] After the simulation experiment is completed, the generated simulation experiment results will be used for in-depth analysis. The first is the analysis of the lubrication characteristics of high-speed gears at low temperatures. This analysis process includes two main parts: one is the verification of the flow field distribution of the high-speed gearbox simulation model, by comparing the simulation results with existing technical literature or experimental data, verifying the accuracy of the model in predicting the distribution morphology of the lubricating oil. The second is a detailed analysis of the gear splash lubrication process at low temperatures, observing the dynamic distribution of the lubricating oil during the rotation of the gear, especially the distribution of the lubricating oil in the gear meshing area, the inner wall and the bottom of the box, and the change of the lubricating oil distribution as the number of gear rotations increases. This analysis process can help us understand the flow characteristics and splashing behavior of lubricating oil in low temperature environments, and provide a basis for optimizing lubrication design.

[0062] Next, the simulation experiment results were used to analyze the influence of lubrication parameters on lubrication characteristics at low temperatures. By changing parameters such as gear speed and oil immersion depth, their influence on the volume fraction of lubricating oil on the tooth surface was studied. The analysis found that under low temperature conditions, the volume fraction of lubricating oil on the tooth surface decreased with the increase of gear speed, mainly because high-speed rotation makes it easier for the lubricating oil to be thrown off the gear surface. However, with the increase of oil immersion depth, the volume fraction of lubricating oil on the tooth surface increased, because the deeper oil immersion depth allows the gear to carry more lubricating oil into the meshing area. This finding is of great significance for optimizing the lubrication design of gear transmission systems, because it reveals how to improve the lubrication effect by adjusting parameters under different working conditions.

[0063] Finally, the simulation results are used to analyze the torque loss of high-speed gear transmission at low temperatures. Torque loss is one of the important indicators to measure the lubrication effect. Through analysis, it is found that the torque loss increases with the increase of gear speed and oil immersion depth. It is worth noting that the effect of speed on torque loss is much greater than that of oil immersion depth. This result shows that when designing a high-speed gear transmission system, special attention should be paid to the effect of gear speed on lubrication and torque loss to achieve efficient operation of the system.

[0064] Based on this, the generated analysis data provides strong support for the optimized design of splash lubrication for high-speed gear transmission under low-temperature conditions. These data not only reveal the flow characteristics and lubrication behavior of lubricating oil in a low-temperature environment but also clarify the influence laws of different parameters on the lubrication effect and torque loss. These findings will guide the subsequent optimized design of the baffle structure to further improve the lubrication efficiency, reduce torque loss, and thus enhance the performance and reliability of the entire gear transmission system.

[0065] Referring to FIGS. 14 to 17, S3, based on the analysis data, add a set of oil baffle modules to the high-speed gearbox simulation model and optimize the oil baffle modules.

[0066] Specifically, step S3 includes: the set of oil baffle modules are respectively arranged on two sides of the driving wheel and the driven wheel, and the oil baffle modules adopt a honeycomb baffle structure.

[0067] Optimize the oil baffle modules, specifically:

[0068] Determine the optimization variables, select DOE sample points from the oil baffle modules, and establish a geometric model according to the DOE sample points.

[0069] Perform CFD simulation analysis on the geometric model, establish an approximate model, and verify whether the accuracy of the approximate model reaches a preset standard.

[0070] If not, re-select DOE sample points to establish and analyze the geometric model.

[0071] If so, use an optimization algorithm to perform optimization on the approximate model until the optimization is completed to obtain the optimized oil baffle modules.

[0072] In this embodiment, after the establishment of the high-speed gearbox simulation model and the analysis of lubrication characteristics are completed, it enters the crucial stage of the design and optimization of the oil baffle modules. The goal of this stage is to significantly improve the lubrication effect of high-speed gear transmission under low-temperature conditions and reduce torque loss by introducing a set of oil baffle modules into the simulation model and optimizing their design. The first step is to add a set of oil baffle modules to the high-speed gearbox simulation model. These oil baffle modules are respectively arranged on two sides of the driving wheel and the driven wheel and adopt a unique honeycomb structure design. The honeycomb structure is widely used in engineering design due to its high material utilization rate and good mechanical properties. In this embodiment, the honeycomb baffle structure can effectively store lubricating oil and guide the lubricating oil to the gear meshing area through its unique geometric shape, thereby improving the lubrication effect. This design not only improves the distribution efficiency of the lubricating oil but also reduces the splash loss of the lubricating oil and enhances the overall performance of the system.

[0073] Step 2: Optimize the design of the oil baffle module. The first step in the optimization process is to determine the optimization variables. Representative design variables are selected from the oil baffle module, such as the length, width, and thickness of the baffle, as well as the size of the honeycomb cells. These variables will directly affect the performance of the oil baffle and the distribution effect of the lubricating oil. Sample points are selected through the Design of Experiments (DOE) method, and a geometric model is established based on these sample points. The DOE method can efficiently explore the design space, ensuring that the selected sample points are representative and uniform, thus providing a reliable basis for subsequent optimization analysis. Among them, computational fluid dynamics (CFD) simulation analysis is performed on the established geometric model. Through CFD simulation, the lubrication performance of the oil baffle module under different design parameters can be evaluated in detail, including key indicators such as the distribution of lubricating oil, the volume fraction of lubricating oil on the tooth surface, and torque loss. Based on the simulation results, an approximation model is established to quickly predict the performance of the oil baffle module. The establishment of the approximation model can significantly reduce the computational cost and improve the optimization efficiency.

[0074] During the optimization process, verifying the accuracy of the approximation model is a crucial step. By comparing the prediction results of the approximation model with the CFD simulation results, it is evaluated whether the accuracy of the model meets the preset standard. If the accuracy of the approximation model does not meet the requirements, it is necessary to reselect the DOE sample points, reestablish the geometric model and conduct analysis to ensure that the approximation model can accurately reflect the actual performance of the oil baffle module. When the accuracy of the approximation model reaches the preset standard, an optimization algorithm is used to optimize the approximation model. The optimization algorithm can automatically search the design space to find the optimal combination of design parameters to maximize the performance of the oil baffle module. The optimization process will continue until the optimization is completed, and finally, the optimized oil baffle module is obtained.

[0075] S4. Install the optimized oil baffle module on both sides of the high-speed gear to be optimized, and end the optimization process.

[0076] Specifically, in this embodiment, through the above implementation steps, this embodiment can successfully introduce the honeycomb baffle structure into the lubrication system of the high-speed gearbox and perform refined design on it through scientific optimization methods. The optimized oil baffle module shows a significant improvement in lubrication performance under low-temperature conditions, with a substantial increase in the volume fraction of lubricating oil on the tooth surface and a significant reduction in torque loss. This optimized design not only improves the lubrication efficiency of the gear transmission system but also enhances the reliability and operating stability of the system, providing a strong guarantee for the efficient operation of the high-speed gear transmission system in a low-temperature environment.

[0077] Please refer to Figures 18 to 22, In summary, a systematic study was conducted on the splash lubrication characteristics and its optimization design of high-speed gear transmission systems in low-temperature environments, and an optimization scheme for the oil baffle based on a bionic honeycomb structure was proposed. Under low-temperature working conditions, the viscosity of the lubricating oil increases and its fluidity decreases, making it difficult for traditional lubrication methods to meet the high-efficiency lubrication requirements of high-speed gear transmissions, resulting in a decline in lubrication effect and an increase in torque loss, thereby affecting the transmission efficiency and reliability of the system. To solve this problem, this method established a two-phase flow analysis model for splash lubrication of high-speed gear transmissions, and deeply analyzed the distribution characteristics of the lubricating oil in low-temperature environments and its influence law on the lubrication effect.

[0078] During the research process, this method first established a simulation model of a high-speed gearbox through numerical simulation methods, and detailedly analyzed the influence of key parameters such as gear speed and immersion depth on the volume fraction of lubricating oil on the tooth surface and torque loss. The research found that as the gear speed increases, the volume fraction of lubricating oil on the tooth surface shows a downward trend, while the increase in immersion depth helps to improve the distribution effect of the lubricating oil. In addition, the torque loss increases with the increase in speed and immersion depth, but the influence of speed on torque loss is more significant. These findings provide an important theoretical basis for the subsequent optimization design of the oil baffle.

[0079] Based on the above analysis results, an innovative bionic honeycomb oil baffle structure was proposed, and its lubrication performance was further improved through optimization design. The design inspiration of the bionic honeycomb baffle comes from the efficient structure of honeycombs in nature. Its hexagonal porous lattice design not only has good mechanical strength but also can effectively store lubricating oil and guide the lubricating oil to the gear meshing area, thereby improving the lubrication effect. By optimizing the structural parameters of the oil baffle, the average volume fraction of lubricating oil on the tooth surface was significantly increased. Compared with the design without a baffle, the optimized oil baffle improved the lubrication effect by 68.46%, and also improved it by 7.88% compared with the traditional baffle. This optimization design not only effectively solved the problem of uneven distribution of lubricating oil in low-temperature environments but also significantly reduced the torque loss of the system and improved the transmission efficiency.

[0080] Compared with the existing technologies, the optimized method for splash lubrication of high-speed gear transmissions at low temperatures has the following beneficial effects:

[0081] 1. By deeply analyzing the lubrication characteristics of high-speed gear transmissions under low-temperature working conditions, it provides a scientific basis for lubrication design in related fields;

[0082] 2. The proposed bionic honeycomb oil baffle structure and its optimization design method significantly improve the lubrication effect in low-temperature environments, reduce torque loss, and enhance the reliability and operation stability of the system;

[0083] 3. The optimized oil baffle has a simple structure and is easy to implement, with high engineering application value, and can be widely applied to gear transmission systems in extreme environments such as aerospace, deep-sea exploration, and ice and snow operations.

[0084] In summary, this method has made important breakthroughs in the research on the splash lubrication characteristics of high-speed gear transmission in low-temperature environments and the optimization of the oil baffle structure, providing an innovative solution for improving the performance and reliability of gear transmission systems, and having significant economic and social benefits.

[0085] Please refer to Figure 23 , the second embodiment of the present invention provides an optimized device for splash lubrication of high-speed gear transmission at low temperature, which includes:

[0086] A simulation unit 201, configured to obtain parameter information of a high-speed gear to be optimized, perform simulation processing on the parameter information using a preset numerical analysis model, and generate a high-speed gearbox simulation model;

[0087] An analysis unit 202, configured to perform a simulation experiment on the high-speed gearbox simulation model according to preset experimental conditions, generate a simulation experiment result, and analyze the simulation experiment result to generate analysis data;

[0088] An optimization unit 203, configured to add a set of oil baffle modules to the high-speed gearbox simulation model based on the analysis data, and optimize the oil baffle modules;

[0089] An installation unit 204, configured to install the optimized oil baffle modules on both sides of the high-speed gear to be optimized, and end the optimization process.

[0090] The above is the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A method for optimizing splash lubrication of high-speed gear transmission at low temperature, characterized in that: include: Acquire parameter information of the high-speed gear to be optimized, use a preset numerical analysis model to simulate the parameter information, and generate a high-speed gearbox simulation model; According to preset experimental conditions, a simulation experiment is performed on the high-speed gearbox simulation model to generate simulation experiment results, and the simulation experiment results are analyzed to generate analysis data; Based on the analysis data, a set of oil baffle modules is added to the high-speed gearbox simulation model, and the oil baffle modules are optimized; The optimized oil baffle modules are installed on both sides of the high-speed gear to be optimized, and the optimization process is ended.

2. The method for optimizing splash lubrication of high-speed gear transmission at low temperature according to claim 1, characterized in that: The numerical analysis model includes a control equation group, a VOF multiphase flow model, a turbulence model, and a dynamic grid technology, wherein the control equation group includes a mass conservation equation, a momentum conservation equation, and an energy conservation equation.

3. The method for optimizing splash lubrication of high-speed gear transmission at low temperature according to claim 1, characterized in that: The high-speed gearbox simulation model includes a box body, and a driving wheel and a driven wheel arranged inside the box body, and the driving wheel and the driven wheel are meshed and connected.

4. The method for optimizing splash lubrication of high-speed gear transmission at low temperature according to claim 3, characterized in that: The parameter information is simulated using a preset numerical analysis model to generate a high-speed gearbox simulation model, specifically: Based on the preset boundary conditions, a splash lubrication three-dimensional model is simulated and generated as an initial model, wherein the initial model is consistent with the hardware structure of the high-speed gearbox simulation model, and the fluid domain is discretized and divided into a plurality of grids, wherein the fluid domain is the area within the box of the initial model except for the driving wheel and the driven wheel of the initial model; Reconstructing the meshes around the driving wheel and the driven wheel of the initial model by using the dynamic mesh technology, and moving the meshing area between the driving wheel and the driven wheel of the initial model by using the tooth surface movement method; The initial model is processed by tetrahedral unstructured mesh division, and the gears of the initial model are processed by surface mesh encryption to generate a high-speed gearbox simulation model.

5. The method for optimizing splash lubrication of high-speed gear transmission at low temperature according to claim 1, characterized in that: The simulation experiment results are analyzed to generate analysis data, specifically: The simulation experiment results are used to analyze the lubrication characteristics of high-speed gears at low temperatures, wherein the analysis includes: verifying the flow field distribution of the high-speed gearbox simulation model and analyzing the gear splash lubrication process at low temperatures; The influence of lubrication parameters on lubrication characteristics at low temperature is analyzed on the simulation experiment results, and the transmission torque loss of high-speed gears at low temperature is analyzed on the simulation experiment results to generate analysis data.

6. The method for optimizing splash lubrication of high-speed gear transmission at low temperature according to claim 5, characterized in that: The analysis data include that during the splash lubrication process of high-speed gear transmission under low temperature conditions, the volume fraction of the tooth surface lubricating oil decreases with the increase of gear speed, but increases with the increase of oil immersion depth, and the torque loss increases with the increase of gear speed and oil immersion depth, among which the influence of speed on torque loss is much greater than that of oil immersion depth.

7. The method for optimizing splash lubrication of high-speed gear transmission at low temperature according to claim 3, characterized in that: The group of oil baffle modules are respectively arranged on two sides of the driving wheel and the driven wheel, and the oil baffle modules adopt a honeycomb baffle structure.

8. The method for optimizing splash lubrication of high-speed gear transmission at low temperature according to claim 1, characterized in that: The oil baffle module is optimized, specifically: Determine optimization variables, select DOE sample points from the oil baffle module, and establish a geometric model based on the DOE sample points; Performing CFD simulation analysis on the geometric model to establish an approximate model, and verifying whether the accuracy of the approximate model meets the preset standard; If not, reselect DOE sample points to establish and analyze the geometric model; If so, an optimization algorithm is used to optimize the approximate model until the optimization is completed to obtain the optimized oil baffle module.

9. A splash lubrication optimization device for high-speed gear transmission at low temperature, characterized in that: include: A simulation unit, used to obtain parameter information of the high-speed gear to be optimized, simulate the parameter information using a preset numerical analysis model, and generate a high-speed gearbox simulation model; An analysis unit, used to perform a simulation experiment on the high-speed gearbox simulation model according to preset experimental conditions, generate simulation experiment results, and analyze the simulation experiment results to generate analysis data; An optimization unit, configured to add a set of oil baffle modules to the high-speed gearbox simulation model based on the analysis data, and optimize the oil baffle modules; The installation unit is used to install the optimized oil baffle module on both sides of the high-speed gear to be optimized, thereby ending the optimization process.

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