Gap optimization method and device of bearing pressing plate, storage medium and electronic device

Abstract

The application provides a bearing pressing plate gap optimization method and device, a storage medium and an electronic device, and the method comprises the following steps: a dynamics model of a transmission system where a bearing pressing plate is located is constructed; a simulation model of a connecting system where the bearing pressing plate is located is constructed based on the dynamics model, wherein the connecting system comprises the bearing pressing plate, a bearing and a middle connecting plate; the minimum safe design gap and the maximum safe design gap between the bearing pressing plate and the middle connecting plate are simulated and calculated respectively by using the simulation model, and the interval range between the minimum safe design gap and the maximum safe design gap is output as the optimal design gap between the bearing pressing plate and the middle connecting plate. Through the embodiment, the technical problem of low efficiency of the gap design of the bearing pressing plate in the prior art is solved, the development and design efficiency of the bearing pressing plate in the new transmission system is improved, and the development cost and period are reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a method and apparatus for optimizing the clearance of a bearing pressure plate, a storage medium, and an electronic device. Background Technology

[0002] In related technologies, bearing clamps are primarily used to protect and secure bearings. A certain gap exists between the bearing clamp and the connected component to press the bearing together, preventing axial movement during operation. Bearing clamps are widely used in the automotive, aerospace, industrial machinery, and household appliance industries.

[0003] Taking a bearing plate connection system for an electric drive as an example, the clearance between the bearing plate and the connecting plate is crucial. The bearing plate contacts the bearing, and the bottom of the bearing contacts the connecting plate. Bolts and clearance are used to press the upper surface of the bearing, ensuring sufficient contact force between the lower surface of the bearing and the connecting plate to withstand axial loads and prevent axial movement. If the clearance is too small, the contact force between the bearing bottom and the connecting plate will be insufficient to resist axial loads, posing a risk of axial movement and potentially causing failure of the electric drive system. If the clearance is too large, the bearing plate will deform excessively, exceeding the material strength limit, thus posing a reliability risk. Therefore, the clearance design between the bearing plate and the connected component is extremely important in product development.

[0004] In related technologies, the following problems exist in the design method of bearing pressure plates: there is a lack of systematic analysis on the connection reliability of the bearing pressure plate connection system, relying only on experience; there is a lack of forward development design method for the design of the clearance value of the bearing pressure plate, and a fixed value is directly adopted.

[0005] No efficient and accurate solution has yet been found to address the aforementioned issues in the relevant technologies. Summary of the Invention

[0006] This invention provides a method and apparatus for optimizing the clearance of a bearing pressure plate, a storage medium, and an electronic device to solve technical problems in related technologies.

[0007] According to an embodiment of the present invention, a method for optimizing the clearance of a bearing pressure plate is provided, comprising: constructing a dynamic model of a transmission system in which the bearing pressure plate is located; constructing a simulation model of a connection system in which the bearing pressure plate is located based on the dynamic model, wherein the connection system includes a bearing pressure plate, a bearing, and a connecting plate; using the simulation model to simulate and calculate the minimum safe design clearance and the maximum safe design clearance between the bearing pressure plate and the connecting plate, wherein the minimum safe design clearance is the minimum design clearance at which the bearing does not experience axial movement under all operating conditions, and the maximum safe design clearance is the maximum design clearance at which the connection system meets reliability requirements; and outputting the range between the minimum safe design clearance and the maximum safe design clearance as the optimal design clearance between the bearing pressure plate and the connecting plate.

[0008] Optionally, the simulation model is used to calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, including: determining the minimum initial design clearance between the bearing pressure plate and the connecting plate; configuring the minimum safe clamping safety factor between the bearing pressure plate and the bearing according to the assembly requirements of the bearing; selecting the minimum safe design clearance based on the minimum initial design clearance and the minimum safe clamping safety factor; calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance; and simulating the maximum safe design clearance between the bearing pressure plate and the connecting plate using the simulation model based on the maximum theoretical design clearance.

[0009] Optionally, selecting the minimum safe design gap based on the minimum initial design gap and the minimum safe clamping safety factor includes: starting from the minimum initial design gap, iteratively executing the following steps until the clamping safety factor corresponding to the current gap is greater than or equal to the minimum safe clamping safety factor: inputting the current gap into the simulation model to obtain the first normal contact force between the bearing pressure plate and the bearing, and the second normal contact force between the bearing and the connecting plate; calculating the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force; determining whether the clamping safety factor is greater than or equal to the minimum safe clamping safety factor; if the clamping safety factor is less than the minimum safe clamping safety factor, increasing the current gap by a preset step size.

[0010] Optionally, calculating the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force includes: calculating the clamping safety factor of the current gap using the following formula. : ;in, The first normal contact force, This is the second normal contact force.

[0011] Optionally, the maximum safe design clearance between the bearing pressure plate and the connecting plate is calculated by simulation model based on the maximum theoretical design clearance. This includes: starting from the maximum theoretical design clearance, iteratively executing the following steps until multiple stress values ​​corresponding to the current maximum clearance meet preset safety conditions: inputting the current maximum clearance into the simulation model to obtain multiple stress values ​​of multiple connectors under full load conditions, wherein the multiple connectors include the bearing pressure plate, the connecting plate, and bolts; determining whether the multiple stress values ​​meet the preset safety conditions; if the multiple stress values ​​meet the preset safety conditions, determining the current maximum clearance as the maximum safe clearance between the bearing pressure plate and the connecting plate; if the multiple stress values ​​do not meet the preset safety conditions, decreasing the current maximum clearance by a preset step size.

[0012] Optionally, determining whether the plurality of stress values ​​meet the preset safety conditions includes: determining whether the first stress value of the bearing pressure plate is less than or equal to the yield strength of the first material, determining whether the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and determining whether the second stress value of the connecting plate is less than or equal to the yield strength of the second material; if the first stress value of the bearing pressure plate is less than or equal to the yield strength of the first material, and the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and the second stress value of the connecting plate is less than or equal to the yield strength of the second material, then the plurality of stress values ​​are determined to meet the preset safety conditions; if the first stress value of the bearing pressure plate is greater than the yield strength of the first material, or the stress amplitude of the bolt is greater than the thread fatigue limit, or the second stress value of the connecting plate is greater than the yield strength of the second material, then the plurality of stress values ​​are determined not to meet the preset safety conditions.

[0013] Optionally, calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance includes: determining the maximum design tolerance of the bearing pressure plate; and adding the maximum design tolerance to the minimum safe design clearance to obtain the maximum theoretical design clearance.

[0014] Optionally, constructing a simulation model of the connection system containing the bearing pressure plate based on the dynamic model includes: constructing a finite element model according to the actual assembly relationship of the connection system, wherein the finite element model includes the bearing pressure plate, bearing, connecting plate, bolt, and housing corresponding to the connection system; configuring material parameters and constraint boundaries for each model component in the finite element model, constraining the connection holes between the bolts and the housing in the finite element model according to the arrangement position of the bearing pressure plate in the connection system, thereby obtaining a simulation model; calculating the bearing force and gear meshing force under full load conditions according to the dynamic model, and applying the bearing force and gear meshing force to the simulation model.

[0015] According to another embodiment of the present invention, a bearing pressure plate clearance optimization device is provided, comprising: a first construction module for constructing a dynamic model of the transmission system in which the bearing pressure plate is located; a second construction module for constructing a simulation model of the connection system in which the bearing pressure plate is located based on the dynamic model, wherein the connection system includes a bearing pressure plate, a bearing, and a connecting plate; a first calculation module for simulating and calculating the minimum safe design clearance and the maximum safe design clearance between the bearing pressure plate and the connecting plate using the simulation model, wherein the minimum safe design clearance is the minimum design clearance at which the bearing does not experience axial movement under all operating conditions, and the maximum safe design clearance is the maximum design clearance at which the connection system meets reliability requirements; and an output module for outputting the range between the minimum safe design clearance and the maximum safe design clearance as the optimal design clearance between the bearing pressure plate and the connecting plate.

[0016] Optionally, the first calculation module includes: a determining unit for determining the minimum initial design clearance between the bearing pressure plate and the connecting plate; a configuring unit for configuring the minimum safe clamping safety factor between the bearing pressure plate and the bearing according to the assembly requirements of the bearing; a selecting unit for selecting the minimum safe design clearance according to the minimum initial design clearance and the minimum safe clamping safety factor; a first calculation unit for calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance; and a second calculation unit for simulating and calculating the maximum safe design clearance between the bearing pressure plate and the connecting plate using the simulation model based on the maximum theoretical design clearance.

[0017] Optionally, the selection unit includes an iterative subunit, used to iteratively execute the following steps starting from the minimum initial design gap, until the clamping safety factor corresponding to the current gap is greater than or equal to the minimum safe clamping safety factor: inputting the current gap into the simulation model to obtain the first normal contact force between the bearing pressure plate and the bearing, and the second normal contact force between the bearing and the connecting plate; calculating the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force; determining whether the clamping safety factor is greater than or equal to the minimum safe clamping safety factor; if the clamping safety factor is less than the minimum safe clamping safety factor, increasing the current gap by a preset step size.

[0018] Optionally, the iterative subunit is further configured to: calculate the clamping safety factor of the current gap using the following formula. : ;in, The first normal contact force, This is the second normal contact force.

[0019] Optionally, the second calculation unit includes an iterative subunit, used to iteratively execute the following steps starting from the maximum theoretical design gap, until multiple stress values ​​corresponding to the current maximum gap meet preset safety conditions: inputting the current maximum gap into the simulation model to obtain multiple stress values ​​of multiple connectors under full load conditions, wherein the multiple connectors include bearing pressure plates, connecting plates, and bolts; determining whether the multiple stress values ​​meet preset safety conditions; if the multiple stress values ​​meet preset safety conditions, determining the current maximum gap as the maximum safe gap between the bearing pressure plate and the connecting plate; if the multiple stress values ​​do not meet preset safety conditions, decreasing the current maximum gap according to a preset step size.

[0020] Optionally, the iterative subunit is further configured to: determine whether the first stress value of the bearing pressure plate is less than or equal to the first material yield strength, determine whether the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and determine whether the second stress value of the connecting plate is less than or equal to the second material yield strength; if the first stress value of the bearing pressure plate is less than or equal to the first material yield strength, and the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and the second stress value of the connecting plate is less than or equal to the second material yield strength, determine that the plurality of stress values ​​meet the preset safety conditions; if the first stress value of the bearing pressure plate is greater than the first material yield strength, or the stress amplitude of the bolt is greater than the thread fatigue limit, or the second stress value of the connecting plate is greater than the second material yield strength, determine that the plurality of stress values ​​do not meet the preset safety conditions.

[0021] Optionally, the first calculation unit includes: a determination subunit for determining the maximum design tolerance of the bearing pressure plate; and a calculation subunit for adding the maximum design tolerance to the minimum safe design clearance to obtain the maximum theoretical design clearance.

[0022] Optionally, the second construction module includes: a construction unit, used to construct a finite element model based on the actual assembly relationship of the connection system, wherein the finite element model includes a bearing pressure plate, bearing, connecting plate, bolt, and housing corresponding to the connection system; a configuration unit, used to configure material parameters and constraint boundaries for each model component in the finite element model, and constrain the connection holes between the bolts and the housing of the finite element model according to the arrangement position of the bearing pressure plate in the connection system, to obtain a simulation model; and an application unit, used to calculate the bearing force and gear meshing force under full load conditions based on the dynamic model, and apply the bearing force and gear meshing force to the simulation model.

[0023] According to another aspect of the embodiments of this application, a storage medium is also provided, the storage medium including a stored program that executes the above steps when the program is run.

[0024] According to another aspect of the embodiments of this application, an electronic device is also provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; wherein: the memory is used to store computer programs; and the processor is used to execute the steps in the above method by running the programs stored in the memory.

[0025] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the steps in the above-described method.

[0026] The beneficial effects of this invention are:

[0027] 1. It has achieved the forward development and precise design of the minimum safe clearance value of the bearing pressure plate. Based on finite element analysis and full load user working conditions, combined with the assembly and manufacturing tolerances of the parts, the optimal clearance value of the bearing pressure plate is precisely designed, which has significant guiding significance for engineering development.

[0028] 2. An axial anti-crossing simulation analysis capability for independently developed electric drive transmission systems was established. Based on full load user operating conditions, the maximum safe design clearance of the bearing pressure plate was designed, and the reliability of electric drive transmission system components was accurately predicted, avoiding over-design or early failure.

[0029] 3. In a bearing plate connection system, clearance design, strength reliability prediction, and connection reliability prediction are realized simultaneously, solving the problem of accurate clearance design in the design, realizing reliability prediction and design guidance for electric drive transmission bearing plates, greatly improving the efficiency of new electric drive development and design, and reducing development costs and cycle. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a hardware structure block diagram of a computer according to an embodiment of the present invention;

[0032] Figure 2 This is a flowchart of a method for optimizing the clearance of a bearing pressure plate according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the connection system where the bearing pressure plate is located in an embodiment of the present invention;

[0034] Figure 4 This is a simulated stress cloud diagram of the bearing pressure plate in an embodiment of the present invention;

[0035] Figure 5 This is a curve showing the change in contact force under full load conditions in an embodiment of the present invention;

[0036] Figure 6 This is a flowchart of a design method for a bearing pressure plate of an electric drive transmission according to an embodiment of the present invention;

[0037] Figure 7 This is a structural block diagram of a bearing pressure plate clearance optimization device according to an embodiment of the present invention. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present application can be combined with each other.

[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0040] Example 1

[0041] The method embodiment provided in Embodiment 1 of this application can be executed in an automobile, processor, computer, or similar processing device. Taking running on a computer as an example, Figure 1 This is a hardware structure block diagram of a computer according to an embodiment of the present invention. For example... Figure 1 As shown, a computer may include one or more ( Figure 1Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. Optionally, the computer may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the computer described above. For example, the computer may also include components that are larger than... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0042] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to a method for optimizing the clearance of a computer bearing pressure plate in an embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the computer via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0043] The transmission device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by a computer's communication provider. In one example, the transmission device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 106 may be a Radio Frequency (RF) module used for wireless communication with the Internet.

[0044] This embodiment provides a method for optimizing the clearance of a bearing pressure plate. Figure 2 This is a flowchart of a method for optimizing the clearance of a bearing pressure plate according to an embodiment of the present invention, as shown below. Figure 2 As shown, the process includes the following steps:

[0045] Step S201: Construct the dynamic model of the transmission system in which the bearing pressure plate is located;

[0046] Optionally, the transmission system can be an electric drive system. Use ROMAX (software not limited) to build a dynamic model of the transmission system in the form of electric drive, and simulate the bearing force and gear meshing force under full load user conditions. The full load conditions include the conditions under various scenarios that the user may use.

[0047] Step S202: Construct a simulation model of the connection system where the bearing pressure plate is located based on the dynamic model, wherein the connection system includes the bearing pressure plate, the bearing, and the connecting plate.

[0048] The connection system in this embodiment can be any structure and connection method including a bearing pressure plate, a bearing, and a connecting plate. The solution in this embodiment can be applied to any transmission system and connection system where the bearing pressure plate is located. Taking the connection of a bearing pressure plate in an electric drive as an example... Figure 3 This is a schematic diagram of the connection system where the bearing pressure plate is located in an embodiment of the present invention, including the bearing pressure plate 3, bolts 2, bearings 5, connecting plate 4, and housing 1. There is a gap Δ between the bearing pressure plate and the connecting plate. Figure 4 This is a simulated stress cloud diagram of the bearing pressure plate in an embodiment of the present invention.

[0049] Step S203: The simulation model is used to simulate and calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, respectively. The minimum safe design clearance is the minimum design clearance at which the bearing does not experience axial movement under all operating conditions, and the maximum safe design clearance is the maximum design clearance at which the connection system meets the reliability requirements.

[0050] Step S204: Output the range between the minimum safety design gap and the maximum safety design gap as the optimal design gap between the bearing pressure plate and the connecting plate.

[0051] Through the above steps, a dynamic model of the transmission system containing the bearing pressure plate is constructed; based on the dynamic model, a simulation model of the connection system containing the bearing pressure plate is constructed, wherein the connection system includes the bearing pressure plate, the bearing, and the connecting plate; the simulation model is used to simulate and calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, wherein the minimum safe design clearance is the minimum design clearance at which the bearing does not experience axial movement under all operating conditions, and the maximum safe design clearance is the maximum design clearance at which the connection system meets reliability requirements; the range between the minimum and maximum safe design clearances is output as the optimal design clearance between the bearing pressure plate and the connecting plate, solving the technical problem of low clearance design efficiency of bearing pressure plates in the prior art, improving the development and design efficiency of bearing pressure plates in new transmission systems, and reducing development costs and cycle.

[0052] In this embodiment, constructing a simulation model of the connection system containing the bearing pressure plate based on the dynamic model includes: constructing a finite element model according to the actual assembly relationship of the connection system, wherein the finite element model includes the bearing pressure plate, bearing, connecting plate, bolt, and housing corresponding to the connection system; configuring material parameters and constraint boundaries for each model component in the finite element model, constraining the connection holes between the bolts and the housing in the finite element model according to the arrangement position of the bearing pressure plate in the connection system, and obtaining the simulation model; calculating the bearing force and gear meshing force under full load conditions according to the dynamic model, and applying the bearing force and gear meshing force to the simulation model.

[0053] Determine the connecting components of the bearing pressure plate connection system, in order to Figure 3 Taking a certain electric drive bearing pressure plate connection system as an example, the main components of the bearing pressure plate connection system include: bearing pressure plate, bolts, bearing, connecting plate, housing, etc.

[0054] When establishing the simulation model of the bearing plate connection system, finite element modeling is first performed. The model includes the bearing plate, bolts, bearings, connecting plate, and housing. Based on the actual assembly relationship of each component, connections are made through contact and threads, with the gap between the bearing plate and the connecting plate using a finite sliding contact method. Then, the material parameters of each component are input to determine the constraint boundaries of the bearing plate connection system. 1) Input material parameters: Input the material parameters of the bearing plate, bolts, bearings, connecting plate, and housing. Material parameters mainly include elastic modulus, Poisson's ratio, density, tensile strength, yield strength, plasticity curve of plastic materials, fatigue limit, etc. 2) Based on different electric drive system layouts and the arrangement of the bearing plate connection system in the entire electric drive transmission system, constrain the bolt connection holes in the housing. Finally, set the simulation boundary conditions for the bearing plate connection model: apply the calculated bearing force and bolt preload under full load user conditions.

[0055] In one embodiment of this example, the simulation model is used to calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, respectively. This includes: determining the minimum initial design clearance between the bearing pressure plate and the connecting plate; configuring the minimum safe clamping safety factor between the bearing pressure plate and the bearing according to the assembly requirements of the bearing; selecting the minimum safe design clearance based on the minimum initial design clearance and the minimum safe clamping safety factor; calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance; and simulating and calculating the maximum safe design clearance between the bearing pressure plate and the connecting plate using the simulation model based on the maximum theoretical design clearance.

[0056] The clamping safety factor in this embodiment is the safety factor between the clamping force generated between the bearing pressure plate and the bearing through the gap.

[0057] In one example, selecting the minimum safety design gap based on the minimum initial design gap and the minimum safety clamping safety factor includes:

[0058] Starting from the minimum initial design gap, iteratively execute the following steps until the clamping safety factor corresponding to the current gap is greater than or equal to the minimum safe clamping safety factor: input the current gap into the simulation model to obtain the first normal contact force between the bearing pressure plate and the bearing, and the second normal contact force between the bearing and the connecting plate; calculate the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force; determine whether the clamping safety factor is greater than or equal to the minimum safe clamping safety factor; if the clamping safety factor is less than the minimum safe clamping safety factor, increase the current gap by a preset step size.

[0059] Optionally, the minimum initial design gap is the minimum design gap set initially, which can start from zero, such as 0.2 or 0.3 mm, and can also be flexibly adjusted.

[0060] Optionally, calculating the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force includes: calculating the clamping safety factor of the current gap using the following formula. : ;in, The first normal contact force, This is the second normal contact force.

[0061] Based on the initially determined minimum design clearance A, the normal contact force between the bearing pressure plate and the bearing can be obtained through simulation analysis model calculation. Normal contact force between the bearing and the connecting plate Then, according to the formula for the bearing clamping safety factor, the clamping safety factor under clearance A can be obtained. .

[0062] Optionally, the minimum safety clamping factor is 1.2. The minimum safety design clearance is the minimum clamping safety factor that ensures the bearing does not experience axial movement under various operating conditions, based on the connection structure of the bearing pressure plate, bearing, and connecting plate. Taking into account assembly and manufacturing tolerances, the minimum safety design clearance corresponds to the minimum bearing clamping safety factor. 1.2.

[0063] Calculated based on the judgment Is it greater than the minimum clamping safety factor? ;if < Then, by optimizing the bearing pressure plate connection system structure or increasing the current clearance A, the simulation analysis model is used again to calculate until... ≥ Then, the minimum safe design gap △min under the minimum clamping safety factor can be calculated.

[0064] Optionally, calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance includes: determining the maximum design tolerance of the bearing pressure plate; and adding the maximum design tolerance to the minimum safe design clearance to obtain the maximum theoretical design clearance.

[0065] Based on the calculated minimum safe design clearance △min, the maximum design tolerance of the bearing pressure plate connection system is B (0.9), then the maximum theoretical design clearance △max = △min + B.

[0066] In one example, the maximum safe design clearance between the bearing pressure plate and the connecting plate is calculated using the simulation model based on the maximum theoretical design clearance. This includes: starting from the maximum theoretical design clearance, iteratively executing the following steps until multiple stress values ​​corresponding to the current maximum clearance meet preset safety conditions: inputting the current maximum clearance into the simulation model to obtain multiple stress values ​​of multiple connectors under full load conditions, wherein the multiple connectors include the bearing pressure plate, the connecting plate, and bolts; determining whether the multiple stress values ​​meet the preset safety conditions; if the multiple stress values ​​meet the preset safety conditions, determining the current maximum clearance as the maximum safe clearance between the bearing pressure plate and the connecting plate; if the multiple stress values ​​do not meet the preset safety conditions, decreasing the current maximum clearance by a preset step size.

[0067] Optionally, determining whether the plurality of stress values ​​meet the preset safety conditions includes: determining whether the first stress value of the bearing pressure plate is less than or equal to the yield strength of the first material, determining whether the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and determining whether the second stress value of the connecting plate is less than or equal to the yield strength of the second material; if the first stress value of the bearing pressure plate is less than or equal to the yield strength of the first material, and the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and the second stress value of the connecting plate is less than or equal to the yield strength of the second material, then the plurality of stress values ​​are determined to meet the preset safety conditions; if the first stress value of the bearing pressure plate is greater than the yield strength of the first material, or the stress amplitude of the bolt is greater than the thread fatigue limit, or the second stress value of the connecting plate is greater than the yield strength of the second material, then the plurality of stress values ​​are determined not to meet the preset safety conditions.

[0068] Based on the maximum theoretical design gap Δmax, the stress distribution and normal pressure of each contact surface of the bearing pressure plate, connecting plate, and connecting bolts under load spectrum conditions are calculated through a simulation analysis model. Since the bearing pressure plate stress ≤ material yield strength, bolt stress amplitude ≤ thread fatigue limit, and connecting plate stress ≤ material yield strength, it can be determined whether the strength of the bearing pressure plate, the reliability of the bolt connection, and the strength of the connecting plate meet the requirements. If the strength does not meet the requirements, the bearing pressure plate structure is optimized to reduce the current gap, and the calculation is repeated until the requirements are met.

[0069] Figure 5 This is a curve of contact force variation under full load conditions in an embodiment of the present invention. The horizontal axis represents the working step, and the vertical axis represents the normal contact force between the bearing pressure plate and the bearing and the normal contact force between the bearing and the connecting plate, respectively.

[0070] Figure 6 This is a flowchart of a design method for bearing pressure plates of an electric drive transmission according to an embodiment of the present invention, including: boundary and load analysis of the connection system between bearing pressure plates; finite element simulation model of the reliability of the bearing pressure plate connection system; design of bearing pressure plate clearance value, including the minimum theoretical clearance design value and the maximum safe clearance design value of the bearing pressure plate. When positioning the maximum safe clearance design value of the bearing pressure plate, it is achieved through the reliability of the bearing pressure plate, bolts, and connected parts.

[0071] This embodiment provides a design method for a bearing pressure plate of an electric drive transmission. In a bearing pressure plate connection system, clearance design, strength reliability prediction, and connection reliability prediction are realized simultaneously. This solves the problem of accurate clearance design in the design, realizes reliability prediction and design guidance for the bearing pressure plate of the electric drive transmission, greatly improves the efficiency of new electric drive development and design, and reduces development costs and cycle.

[0072] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0073] Example 2

[0074] This embodiment also provides a bearing pressure plate clearance optimization device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0075] Figure 7 This is a structural block diagram of a bearing pressure plate clearance optimization device according to an embodiment of the present invention, as shown below. Figure 7 As shown, the device includes:

[0076] The first construction module 71 is used to construct the dynamic model of the transmission system where the bearing pressure plate is located;

[0077] The second construction module 72 is used to construct a simulation model of the connection system where the bearing pressure plate is located based on the dynamic model, wherein the connection system includes the bearing pressure plate, the bearing, and the connecting plate.

[0078] The first calculation module 73 is used to simulate and calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate using the simulation model. The minimum safe design clearance is the minimum design clearance at which the bearing does not experience axial movement under all operating conditions, and the maximum safe design clearance is the maximum design clearance when the connection system meets the reliability requirements.

[0079] Output module 74 is used to output the range between the minimum safety design gap and the maximum safety design gap as the optimal design gap between the bearing pressure plate and the connecting plate.

[0080] Optionally, the first calculation module includes: a determining unit for determining the minimum initial design clearance between the bearing pressure plate and the connecting plate; a configuring unit for configuring the minimum safe clamping safety factor between the bearing pressure plate and the bearing according to the assembly requirements of the bearing; a selecting unit for selecting the minimum safe design clearance according to the minimum initial design clearance and the minimum safe clamping safety factor; a first calculation unit for calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance; and a second calculation unit for simulating and calculating the maximum safe design clearance between the bearing pressure plate and the connecting plate using the simulation model based on the maximum theoretical design clearance.

[0081] Optionally, the selection unit includes an iterative subunit, used to iteratively execute the following steps starting from the minimum initial design gap, until the clamping safety factor corresponding to the current gap is greater than or equal to the minimum safe clamping safety factor: inputting the current gap into the simulation model to obtain the first normal contact force between the bearing pressure plate and the bearing, and the second normal contact force between the bearing and the connecting plate; calculating the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force; determining whether the clamping safety factor is greater than or equal to the minimum safe clamping safety factor; if the clamping safety factor is less than the minimum safe clamping safety factor, increasing the current gap by a preset step size.

[0082] Optionally, the iterative subunit is further configured to: calculate the clamping safety factor of the current gap using the following formula. : ;in, The first normal contact force, This is the second normal contact force.

[0083] Optionally, the second calculation unit includes an iterative subunit, used to iteratively execute the following steps starting from the maximum theoretical design gap, until multiple stress values ​​corresponding to the current maximum gap meet preset safety conditions: inputting the current maximum gap into the simulation model to obtain multiple stress values ​​of multiple connectors under full load conditions, wherein the multiple connectors include bearing pressure plates, connecting plates, and bolts; determining whether the multiple stress values ​​meet preset safety conditions; if the multiple stress values ​​meet preset safety conditions, determining the current maximum gap as the maximum safe gap between the bearing pressure plate and the connecting plate; if the multiple stress values ​​do not meet preset safety conditions, decreasing the current maximum gap according to a preset step size.

[0084] Optionally, the iterative subunit is further configured to: determine whether the first stress value of the bearing pressure plate is less than or equal to the first material yield strength, determine whether the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and determine whether the second stress value of the connecting plate is less than or equal to the second material yield strength; if the first stress value of the bearing pressure plate is less than or equal to the first material yield strength, and the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and the second stress value of the connecting plate is less than or equal to the second material yield strength, determine that the plurality of stress values ​​meet the preset safety conditions; if the first stress value of the bearing pressure plate is greater than the first material yield strength, or the stress amplitude of the bolt is greater than the thread fatigue limit, or the second stress value of the connecting plate is greater than the second material yield strength, determine that the plurality of stress values ​​do not meet the preset safety conditions.

[0085] Optionally, the first calculation unit includes: a determination subunit for determining the maximum design tolerance of the bearing pressure plate; and a calculation subunit for adding the maximum design tolerance to the minimum safe design clearance to obtain the maximum theoretical design clearance.

[0086] Optionally, the second construction module includes: a construction unit, used to construct a finite element model based on the actual assembly relationship of the connection system, wherein the finite element model includes a bearing pressure plate, bearing, connecting plate, bolt, and housing corresponding to the connection system; a configuration unit, used to configure material parameters and constraint boundaries for each model component in the finite element model, and constrain the connection holes between the bolts and the housing of the finite element model according to the arrangement position of the bearing pressure plate in the connection system, to obtain a simulation model; and an application unit, used to calculate the bearing force and gear meshing force under full load conditions based on the dynamic model, and apply the bearing force and gear meshing force to the simulation model.

[0087] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0088] Example 3

[0089] Embodiments of the present invention also provide a storage medium storing a computer program, wherein the computer program is configured to execute the steps in any of the above method embodiments when running.

[0090] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0091] S1, Construct the dynamic model of the transmission system where the bearing pressure plate is located;

[0092] S2, Based on the dynamic model, construct a simulation model of the connection system where the bearing pressure plate is located, wherein the connection system includes the bearing pressure plate, the bearing, and the connecting plate;

[0093] S3, the simulation model is used to simulate and calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, wherein the minimum safe design clearance is the minimum design clearance at which the bearing does not axially move under all operating conditions, and the maximum safe design clearance is the maximum design clearance when the connection system meets the reliability requirements;

[0094] S4, output the range between the minimum safety design gap and the maximum safety design gap as the optimal design gap between the bearing pressure plate and the connecting plate.

[0095] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0096] Embodiments of the present invention also provide an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0097] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0098] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0099] S1, Construct the dynamic model of the transmission system where the bearing pressure plate is located;

[0100] S2, Based on the dynamic model, construct a simulation model of the connection system where the bearing pressure plate is located, wherein the connection system includes the bearing pressure plate, the bearing, and the connecting plate;

[0101] S3, the simulation model is used to simulate and calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, wherein the minimum safe design clearance is the minimum design clearance at which the bearing does not axially move under all operating conditions, and the maximum safe design clearance is the maximum design clearance when the connection system meets the reliability requirements;

[0102] S4, output the range between the minimum safety design gap and the maximum safety design gap as the optimal design gap between the bearing pressure plate and the connecting plate.

[0103] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0104] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0105] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0106] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0107] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for optimizing the clearance of a bearing pressure plate, characterized in that, include: Construct a dynamic model of the transmission system in which the bearing pressure plate is located; Based on the aforementioned dynamic model, a simulation model of the connection system in which the bearing pressure plate is located is constructed, wherein the connection system includes the bearing pressure plate, the bearing, and the connecting plate. The simulation model is used to simulate and calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, respectively. The minimum safe design clearance is the minimum design clearance at which the bearing does not experience axial movement under all operating conditions, and the maximum safe design clearance is the maximum design clearance at which the connection system meets reliability requirements. The range between the minimum and maximum safe design clearances is output as the optimal design clearance between the bearing pressure plate and the connecting plate. The simulation model is used to calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate, including: determining the minimum initial design clearance between the bearing pressure plate and the connecting plate; configuring the minimum safe clamping safety factor between the bearing pressure plate and the bearing according to the assembly requirements of the bearing; selecting the minimum safe design clearance based on the minimum initial design clearance and the minimum safe clamping safety factor; calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance; and simulating and calculating the maximum safe design clearance between the bearing pressure plate and the connecting plate using the simulation model based on the maximum theoretical design clearance. The selection of the minimum safe design gap based on the minimum initial design gap and the minimum safe clamping safety factor includes: starting from the minimum initial design gap, iteratively executing the following steps until the clamping safety factor corresponding to the current gap is greater than or equal to the minimum safe clamping safety factor: inputting the current gap into the simulation model to obtain the first normal contact force between the bearing pressure plate and the bearing, and the second normal contact force between the bearing and the connecting plate; calculating the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force; determining whether the clamping safety factor is greater than or equal to the minimum safe clamping safety factor; if the clamping safety factor is less than the minimum safe clamping safety factor, increasing the current gap by a preset step size; The calculation of the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force includes: calculating the clamping safety factor of the current gap using the following formula. : ;in, The first normal contact force, This is the second normal contact force.

2. The method according to claim 1, characterized in that, Based on the maximum theoretical design clearance, the maximum safe design clearance between the bearing pressure plate and the connecting plate is calculated using the simulation model, including: Starting from the maximum theoretical design gap, iteratively execute the following steps until multiple stress values ​​corresponding to the current maximum gap meet preset safety conditions: input the current maximum gap into the simulation model to obtain multiple stress values ​​of multiple connectors under full load conditions, wherein the multiple connectors include bearing pressure plates, connecting plates, and bolts; determine whether the multiple stress values ​​meet preset safety conditions; if the multiple stress values ​​meet preset safety conditions, determine the current maximum gap as the maximum safe gap between the bearing pressure plate and the connecting plate; if the multiple stress values ​​do not meet preset safety conditions, decrease the current maximum gap according to a preset step size.

3. The method according to claim 2, characterized in that, Determining whether the plurality of stress values ​​meet the preset safety conditions includes: Determine whether the first stress value of the bearing pressure plate is less than or equal to the first material yield strength, determine whether the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and determine whether the second stress value of the connecting plate is less than or equal to the second material yield strength. If the first stress value of the bearing pressure plate is less than or equal to the yield strength of the first material, and the stress amplitude of the bolt is less than or equal to the thread fatigue limit, and the second stress value of the connecting plate is less than or equal to the yield strength of the second material, then the plurality of stress values ​​are determined to meet the preset safety conditions; if the first stress value of the bearing pressure plate is greater than the yield strength of the first material, or the stress amplitude of the bolt is greater than the thread fatigue limit, or the second stress value of the connecting plate is greater than the yield strength of the second material, then the plurality of stress values ​​are determined not to meet the preset safety conditions.

4. The method according to claim 1, characterized in that, The calculation of the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance includes: Determine the maximum design tolerance of the bearing pressure plate; The maximum theoretical design clearance is obtained by adding the maximum design tolerance to the minimum safety design clearance.

5. The method according to claim 1, characterized in that, The simulation model of the connection system containing the bearing pressure plate, constructed based on the aforementioned dynamic model, includes: A finite element model is constructed based on the actual assembly relationship of the connection system, wherein the finite element model includes the bearing pressure plate, bearing, connecting plate, bolt, and housing corresponding to the connection system; For each model component in the finite element model, material parameters and constraint boundaries are configured, and the connection holes between the bolts and the housing in the finite element model are constrained according to the arrangement position of the bearing pressure plate in the connection system to obtain the simulation model; The bearing force and gear meshing force under full load conditions are calculated based on the dynamic model, and the bearing force and gear meshing force are applied to the simulation model.

6. A bearing pressure plate clearance optimization device, characterized in that, include: The first building module is used to build the dynamic model of the transmission system where the bearing pressure plate is located; The second construction module is used to construct a simulation model of the connection system where the bearing pressure plate is located based on the dynamic model, wherein the connection system includes the bearing pressure plate, the bearing, and the connecting plate. The first calculation module is used to simulate and calculate the minimum and maximum safe design clearances between the bearing pressure plate and the connecting plate using the simulation model. The minimum safe design clearance is the minimum design clearance at which the bearing does not experience axial movement under all operating conditions, and the maximum safe design clearance is the maximum design clearance when the connection system meets the reliability requirements. The output module is used to output the range between the minimum safety design gap and the maximum safety design gap as the optimal design gap between the bearing pressure plate and the connecting plate; The first calculation module includes: a determining unit for determining the minimum initial design clearance between the bearing pressure plate and the connecting plate; a configuring unit for configuring the minimum safe clamping safety factor between the bearing pressure plate and the bearing according to the assembly requirements of the bearing; a selecting unit for selecting the minimum safe design clearance according to the minimum initial design clearance and the minimum safe clamping safety factor; a first calculation unit for calculating the maximum theoretical design clearance based on the design tolerance of the bearing pressure plate and the minimum safe design clearance; and a second calculation unit for simulating and calculating the maximum safe design clearance between the bearing pressure plate and the connecting plate using the simulation model based on the maximum theoretical design clearance. The selection unit includes an iterative subunit, used to iteratively execute the following steps starting from the minimum initial design gap, until the clamping safety factor corresponding to the current gap is greater than or equal to the minimum safe clamping safety factor: inputting the current gap into the simulation model to obtain the first normal contact force between the bearing pressure plate and the bearing, and the second normal contact force between the bearing and the connecting plate; calculating the clamping safety factor of the current gap based on the first normal contact force and the second normal contact force; determining whether the clamping safety factor is greater than or equal to the minimum safe clamping safety factor; if the clamping safety factor is less than the minimum safe clamping safety factor, increasing the current gap by a preset step size; The iterative subunit is further configured to: calculate the clamping safety factor of the current gap using the following formula. : ;in, The first normal contact force, This is the second normal contact force.

7. A storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the method described in any one of claims 1 to 5 when it is run.

8. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the method as described in any one of claims 1 to 5.

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