CN117875024A

CN117875024A - Transmission efficiency simulation method and device and computer equipment

Info

Publication number: CN117875024A
Application number: CN202311778306.5A
Authority: CN
Inventors: 王学旭; 张冰; 樊雪来; 石珊; 杨健; 张凇瑞
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-12-21
Filing date: 2023-12-21
Publication date: 2024-04-12

Abstract

The application provides a transmission efficiency simulation method and device of a transmission and computer equipment, and relates to the technical field of simulation calculation, wherein the method comprises the following steps: calculating loss parameters of all transmission subsystems respectively through a loss calculation model of all transmission subsystems in the transmission; calculating a power loss parameter of the transmission according to the loss parameters of each transmission subsystem; and calculating the transmission efficiency of the transmission under the working condition according to the input power parameter and the power loss parameter of the transmission under the target working condition. The simulation calculation of the transmission efficiency of the transmission can be realized, the product development period and iteration times of the transmission are shortened, meanwhile, the manpower and test resources input due to efficiency are reduced, and the product development cost is saved.

Description

Transmission efficiency simulation method and device and computer equipment

Technical Field

The application relates to the technical field of simulation calculation, in particular to a transmission efficiency simulation method and device of a transmission and computer equipment.

Background

The transmission efficiency of the transmission is an important index for evaluating the performance of the transmission.

Currently, for efficiency evaluation and prediction of a transmission, test means are adopted in the industry, that is, a special test device or equipment is used for testing, torque and rotation speed input to the transmission are respectively monitored, torque and rotation speed output by the transmission are correspondingly monitored, and efficiency calculation is performed according to the ratio of output energy to input energy.

However, the method has the defects of late practice period, high test condition requirement, high efficiency evaluation cost and slow whole vehicle development flow because the experiment test is necessarily carried out based on the entity test piece of the transmission.

Disclosure of Invention

The invention aims at overcoming the defects in the prior art, and provides a transmission efficiency simulation method, device and computer equipment for a transmission, so that simulation calculation of the transmission efficiency of the transmission is realized, the product development period and iteration times of the transmission are shortened, meanwhile, the manpower and test resources input due to efficiency are reduced, and the product development cost is saved.

In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

in a first aspect, an embodiment of the present application provides a transmission efficiency simulation method, including: calculating loss parameters of all transmission subsystems by adopting a loss calculation model of all transmission subsystems in a transmission;

Calculating a power loss parameter of the transmission according to the loss parameters of the transmission subsystems;

and calculating the transmission efficiency of the transmission under the target working condition according to the input power parameter of the transmission under the target working condition and the power loss parameter.

In one possible implementation, the transmission subsystems include: the device comprises a gear engagement system, an oil seal friction system, a bearing friction system, an oil stirring system, a synchronous dragging system and a clutch dragging system; the method for calculating the loss parameters of each transmission subsystem by adopting the loss calculation model of each transmission subsystem in the transmission comprises the following steps of:

calculating a gear engagement loss parameter by adopting a pre-constructed gear engagement loss calculation model of the gear engagement system;

calculating oil seal friction loss parameters by adopting a pre-constructed oil seal friction loss calculation model of the oil seal friction system;

calculating a bearing friction loss parameter by adopting a pre-constructed bearing friction loss calculation model of the bearing friction system;

calculating oil stirring loss parameters by adopting a pre-constructed oil stirring loss calculation model of the oil stirring system;

calculating synchronous dragging loss parameters by adopting a pre-constructed synchronous dragging loss calculation model of the synchronous dragging system;

And calculating clutch drag loss parameters by adopting a pre-constructed clutch drag loss calculation model of the clutch drag system.

In one possible implementation manner, the method further includes, before calculating the gear engagement loss parameter, using a pre-constructed gear engagement loss calculation model of the gear engagement system:

constructing a model frame according to the transmission relation of the physical elements of the gear meshing system;

configuring transmission configuration parameters of each virtual element in the model frame according to transmission configuration operation of each virtual element in the model frame;

configuring simulation configuration parameters of the model frame according to simulation configuration operation aiming at the loss calculation model to obtain the gear engagement loss calculation model;

the gear engagement loss calculation model of the gear engagement system constructed in advance is adopted to calculate gear engagement loss parameters, and the gear engagement loss calculation model comprises the following steps:

acquiring target torque and target rotating speed of the transmission under the target working condition;

and calculating by adopting the gear engagement loss calculation model according to the target torque and the target rotating speed to obtain the gear engagement loss parameter.

In one possible implementation manner, the method further includes, before calculating the oil seal friction loss parameter, using a pre-constructed oil seal friction loss calculation model of the oil seal friction system:

acquiring a preset friction force calculation formula, a preset friction moment calculation formula and a preset friction power calculation formula;

constructing the oil seal friction loss calculation model according to the set friction force calculation formula, the preset friction moment calculation formula and the preset friction power calculation formula;

the oil seal friction loss calculation model of the oil seal friction system constructed in advance is adopted to calculate oil seal friction loss parameters, and the oil seal friction loss calculation model comprises the following steps:

acquiring a size parameter of an installation shaft where an oil seal part is located in the oil seal friction system, a preset unit friction parameter and a target rotating speed of the transmission under the target working condition;

and calculating the oil seal friction loss parameter by adopting the oil seal friction loss calculation model according to the size of the installation shaft, the preset unit friction parameter and the target rotating speed.

In one possible implementation manner, the method further includes, before calculating the bearing friction loss parameter, using a pre-constructed bearing friction loss calculation model of the bearing friction system:

Acquiring a shaft tooth design parameter in a bearing friction system in the transmission, and constructing a shaft tooth three-dimensional power model of the transmission;

acquiring shell design parameters of the transmission, and constructing a shell three-dimensional model of the transmission;

constructing the bearing friction loss calculation model based on the shaft tooth three-dimensional dynamic model and the shell three-dimensional model;

the method for calculating the bearing friction loss parameter by adopting the pre-constructed bearing friction loss calculation model of the bearing friction system comprises the following steps:

and calculating by adopting the bearing friction loss calculation model according to the target torque and the target rotating speed to obtain the bearing friction loss parameter.

In one possible implementation manner, before the calculating of the churning loss parameter by using the pre-constructed churning loss calculation model of the churning system, the method further includes:

acquiring a three-dimensional geometric model of the transmission;

splitting the three-dimensional geometric model to obtain a three-dimensional geometric model of a plurality of parts;

adding three-dimensional geometric models of the parts in a solid domain, and configuring fluid motion parameters for the three-dimensional geometric models of the parts in a fluid domain to obtain the oil stirring loss calculation model;

The calculating the oil stirring loss parameter by adopting a pre-constructed oil stirring loss calculation model of the oil stirring system comprises the following steps:

configuring corresponding rotation configuration parameters for a three-dimensional geometric model of a target part in the solid domain, wherein the target part is a rotary motion part;

and calculating by adopting the oil stirring loss calculation model according to the first preset fluid configuration parameter and preset output interval information to obtain the oil stirring loss parameter.

In one possible implementation manner, before the synchronous drag loss calculation model of the synchronous drag system is constructed in advance, the method further includes:

acquiring a stress calculation formula, a moment calculation formula and a power calculation formula of a synchronous ring and a synchronous cone in the synchronous dragging system;

constructing the synchronous drag loss calculation model according to the stress calculation formula, the moment calculation formula and the power calculation formula;

the step of calculating the synchronous drag loss parameter by adopting a pre-constructed synchronous drag loss calculation model of the synchronous drag system comprises the following steps:

acquiring a gravity parameter of the synchronizing ring and a relative position parameter of the synchronizing ring and the synchronizing cone;

And calculating the synchronous dragging loss parameter by adopting the synchronous dragging loss calculation model according to the gravity parameter, the relative position parameter, the preset friction coefficients of the synchronous ring and the synchronous cone and the target rotating speed of the transmission under the target working condition.

In one possible implementation manner, before the calculating a clutch drag loss parameter by using the pre-constructed clutch drag loss calculation model of the clutch drag system, the method further includes:

acquiring a three-dimensional geometric model of each clutch part in the clutch drag system;

a physical turbulence model, surface grid parameters and rotation motion parameters are configured for the three-dimensional geometric model of each clutch part, and the clutch drag loss calculation model is obtained;

the clutch drag loss calculation model of the clutch drag system constructed in advance is adopted to calculate clutch drag loss parameters, and the clutch drag loss calculation model comprises the following steps:

and calculating by adopting the clutch drag loss calculation model according to a second preset fluid configuration parameter to obtain the clutch drag loss parameter.

In a second aspect, another embodiment of the present application provides a transmission efficiency simulation apparatus, the apparatus comprising:

The first calculation module is used for calculating loss parameters of all transmission subsystems in the transmission by adopting a loss calculation model of the transmission subsystems;

the second calculation module is used for calculating the power loss parameters of the speed changer according to the loss parameters of the transmission subsystems;

and the third calculation module is used for calculating the transmission efficiency of the transmission under the target working condition according to the input power parameter of the transmission under the target working condition and the power loss parameter.

In a third aspect, another embodiment of the present application provides a computer device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating over the bus when the computer device is running, the processor executing the machine-readable instructions to perform the steps of the transmission efficiency simulation method as described in any of the first aspects above.

In a fourth aspect, another embodiment of the present application provides a storage medium having a computer program stored thereon, which when executed by a processor performs the steps of the transmission efficiency simulation method according to any one of the first aspects described above.

The beneficial effects of this application are: the application provides a transmission efficiency simulation method, a device, computer equipment and a storage medium of a transmission, wherein a loss calculation model of each transmission subsystem in the transmission is adopted to calculate loss parameters of each transmission subsystem respectively; calculating a power loss parameter of the transmission according to the loss parameters of each transmission subsystem; and calculating the transmission efficiency of the transmission under the working condition according to the input power parameter and the power loss parameter of the transmission under the target working condition. According to the method, the loss parameters of all transmission subsystems in the transmission are calculated respectively by adopting the loss calculation model of all transmission subsystems in the transmission, then the power loss parameters of the transmission are calculated, and then the transmission efficiency of the transmission under the target working condition is calculated directly by combining the input power parameters and the power loss parameters of the transmission under the target working condition, so that efficiency test is not required after a test piece of the transmission is obtained, the efficiency simulation result of the transmission can be obtained through a software algorithm directly in the product design stage, efficiency data can be obtained in the earlier stage of product development, the problem that the efficiency index does not reach the standard can be found before the test piece is processed, the design scheme is adjusted in time, the product development period and the iteration times are shortened, the manpower and test resources input in the aspect of efficiency are reduced, and the product development cost is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a first transmission efficiency simulation method provided in an embodiment of the present application;

FIG. 2 is a flow chart of a second transmission efficiency simulation method provided in an embodiment of the present application;

FIG. 3 is a flow chart of a third transmission efficiency simulation method provided in an embodiment of the present application;

FIG. 4 is a flow chart of a fourth transmission efficiency simulation method provided by an embodiment of the present application;

FIG. 5 is a flowchart of a fifth exemplary transmission efficiency simulation method according to an embodiment of the present disclosure;

FIG. 6 is a load table provided in an embodiment of the present application;

FIG. 7 is a flowchart of a sixth transmission efficiency simulation method according to an embodiment of the present disclosure;

FIG. 8 is a flow chart of a seventh transmission efficiency simulation method provided by an embodiment of the present application;

FIG. 9 is a flow chart of an eighth transmission efficiency simulation method provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of a transmission efficiency simulation device according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a computer device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it should be understood that the accompanying drawings in the present application are only for the purpose of illustration and description, and are not intended to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. A flowchart, as used in this application, illustrates operations implemented according to some embodiments of the present application. It should be understood that the operations of the flow diagrams may be implemented out of order and that steps without logical context may be performed in reverse order or concurrently. Moreover, one or more other operations may be added to the flow diagrams and one or more operations may be removed from the flow diagrams as directed by those skilled in the art.

In addition, the described embodiments are only some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the presence of the features stated hereinafter, but not to exclude the addition of other features.

Compared with the traditional efficiency test scheme of the transmission, the method provided by the embodiments can be executed in the development design stage of the transmission, and can realize the efficiency simulation of the transmission by adopting software simulation calculation based on the corresponding design parameters of the transmission without experimental test of the real object of the transmission. The transmission to which the present application is directed may be a hybrid transmission or a purely electric transmission. If the transmission is a hybrid transmission, the transmission can be applied to a hybrid new energy automobile.

In order to clearly describe the method of the embodiment of the application, the transmission driving efficiency simulation method provided by the embodiment of the application is described below with reference to a plurality of drawings. An embodiment of the present application provides a first transmission efficiency simulation method, and fig. 1 is a schematic flow chart of the first transmission efficiency simulation method provided in the embodiment of the present application, as shown in fig. 1, where the method includes:

s101, calculating loss parameters of all transmission subsystems by adopting a loss calculation model of all transmission subsystems in the transmission.

Before the method is executed, a transmission system of the transmission can be split based on a preset power loss type to obtain transmission subsystems corresponding to the power loss of the corresponding type, and an efficiency simulation flow, also called a loss calculation model, of each transmission subsystem is constructed based on design parameters of each transmission subsystem.

In the process of efficiency simulation of the transmission, a loss calculation model of each transmission subsystem can be adopted respectively, and efficiency simulation calculation can be carried out on each transmission subsystem respectively to obtain loss parameters of each transmission subsystem. The loss parameters for each transmission subsystem may be used to characterize the corresponding type of power parameters for each transmission subsystem.

S102, calculating the power loss parameters of the transmission according to the loss parameters of the transmission subsystems.

In a possible implementation example, the power loss parameters in each transmission subsystem may be weighted to obtain the power loss parameters of the transmission. The power loss parameter of the transmission may be used to characterize the overall total power loss parameter of the transmission.

S103, calculating the transmission efficiency of the transmission under the target working condition according to the input power parameter and the power loss parameter of the transmission under the target working condition.

The speed changer has different torques and/or rotating speeds under different working conditions, and correspondingly, the input power parameters under the working conditions can be calculated based on the torques and the rotating speeds under the working conditions. The target operating condition is any one of a plurality of operating conditions. In an actual application example, the transmission is divided into a plurality of working conditions by the preset maximum torque and the preset maximum rotation speed of the transmission, so that the working conditions have corresponding torque and rotation speed, and the torque and rotation speed of each working condition are within the maximum torque and the maximum rotation speed range of the transmission.

For example, according to the torque M and the rotation speed n under the target working condition, the input power parameter P of the transmission under the target working condition is obtained through a preset transmission power calculation formula (1).

Where n is the speed of the transmission and M is the torque of the transmission.

Furthermore, the effective power parameter of the transmission under the target working condition can be calculated according to the input power parameter and the power loss parameter of the transmission under the target working condition, and the transmission efficiency of the transmission under the target working condition can be obtained by calculating the ratio of the effective power parameter of the transmission to the input power parameter under the target working condition.

The utility model provides a transmission efficiency simulation method of a transmission, which can be used for calculating the loss parameters of each transmission subsystem in the transmission through adopting a loss calculation model of each transmission subsystem in the transmission, calculating the power loss parameters of the transmission, further combining the input power parameters and the power loss parameters of the transmission under a target working condition, directly calculating the transmission efficiency of the transmission under the target working condition, directly calculating the transmission efficiency without carrying out efficiency test after obtaining a test-made material object of the transmission, directly obtaining the efficiency simulation result of the transmission through a software algorithm in the product design stage, obtaining efficiency data in the earlier stage of product development, finding out the problem that the efficiency index does not reach the standard before the test-made material is processed, thereby timely adjusting the design scheme, shortening the product development period and the iteration times, simultaneously reducing the manpower and test resources input in the aspect of efficiency and saving the product development cost.

In accordance with the above embodiments, each of the drive subsystems of the transmission may include: the embodiment of the application also provides a second transmission efficiency simulation method of the transmission based on the disassembly of the transmission subsystem. Fig. 2 is a flow chart of a second simulation method for transmission efficiency of a transmission according to an embodiment of the present application, as shown in fig. 2, in S101, a loss calculation model of each transmission subsystem in the transmission is adopted, and loss parameters of each transmission subsystem are calculated respectively, including:

s201, calculating a gear engagement loss parameter by adopting a gear engagement loss calculation model of a pre-built gear engagement system.

The gear engagement loss is energy loss generated by engagement between gears when the transmission works, is related to rotating speed and torque of the transmission, and can be calculated by building a one-dimensional model according to the gear engagement loss related device in the transmission through complex system modeling and simulation platform building, wherein the system modeling and simulation platform building can be AMESim software, so that the gear engagement loss under different working conditions is calculated through the engagement loss model.

S202, calculating oil seal friction loss parameters by adopting an oil seal friction loss calculation model of a pre-constructed oil seal friction system.

The oil seal friction loss is energy loss caused by friction resistance generated when the oil seal moves in lubricating oil during operation of the transmission, is related to the rotating speed of the transmission, and is calculated according to a friction empirical formula by means of devices related to the oil seal friction loss in the transmission.

S203, calculating a bearing friction loss parameter by adopting a bearing friction loss calculation model of a pre-constructed bearing friction system.

The bearing friction loss is energy loss generated by friction of a bearing in the running process of the transmission when the transmission works, and is related to the rotating speed of the transmission, so that a bearing friction loss calculation model is built through devices related to the bearing friction loss in the transmission according to bearing efficiency loss experience and transmission system analysis software, wherein the transmission system analysis software can be Masta software, and bearing friction losses under different working conditions are calculated through the bearing friction loss.

S204, calculating oil stirring loss parameters by adopting a pre-constructed oil stirring loss calculation model of the oil stirring system.

The oil stirring loss is energy loss generated by stirring oil in a lubrication system when the transmission works, is related to the rotating speed of the transmission, and constructs an oil stirring loss calculation three-dimensional model according to three-dimensional high-performance numerical calculation software through devices related to the system oil stirring loss in the transmission, wherein the three-dimensional high-performance numerical calculation software can be ShonDy software, so that the oil stirring loss under different working conditions is calculated through the oil stirring loss calculation model.

S205, calculating synchronous drag loss parameters by adopting a synchronous drag loss calculation model of a synchronous drag system which is built in advance.

The synchronous drag loss is energy loss generated by relative motion among gears in a synchronous gear transmission system when the transmission works, and is related to the rotating speed of the transmission, and a synchronous drag loss calculation model is built according to a mechanical empirical formula through devices related to the synchronizer loss in the transmission, so that the synchronous drag loss under different working conditions is calculated through the synchronous drag loss calculation model.

S206, calculating clutch drag loss parameters by adopting a clutch drag loss calculation model of a pre-constructed clutch drag system.

The clutch drag loss is energy loss caused by friction, stirring and the like in the clutch separation and engagement process of the transmission during operation, the energy loss is related to the rotating speed of the transmission, a three-dimensional clutch drag loss calculation model is built according to fluid simulation analysis software through devices related to the clutch loss in the transmission, the fluid simulation analysis software can be star-ccm+ software, and therefore the clutch drag loss under different working conditions is calculated through the clutch drag loss calculation model.

In this embodiment, the order of steps S201 to S206 is not required, and may be performed in any order or may be performed synchronously.

In the embodiment of the application, the transmission is divided into different transmission subsystems, different loss calculation models are built for the different transmission subsystems, the power loss parameters of the transmission subsystems are calculated respectively, the accuracy of the power loss parameters obtained through model calculation is higher, the calculation is simpler and more convenient, and the reliability of the obtained parameters is higher.

On the basis of the foregoing embodiments, the present embodiment further provides a third transmission efficiency simulation method, and fig. 3 is a schematic flow chart of the third transmission efficiency simulation method provided by the embodiment of the present application, as shown in fig. 3, and before calculating the gear engagement loss parameter by using the gear engagement loss calculation model of the pre-constructed gear engagement system in S201, the method further includes:

s301, constructing a model frame according to the transmission relation of physical elements of the gear meshing system.

Wherein the physical elements of the gear engagement system include: power element (Powertrain), one-dimensional Mechanical element (1D Mechanical), signal Control element (Signal), thermal element (Thermal), pneumatic element (Pneumatic) five general classes of elements. The names and the number of the elements specifically required by the specific five kinds of elements are as follows:

The power element comprises: four gears and a torque converter; the one-dimensional mechanical element includes: two speed rotation sensors, a torque sensor and a planetary gear mechanism; the signal control element includes: a heat sensor; the thermal element includes: four temperature sensors; the pneumatic element comprises: a signal receiver, a dynamic schedule, and three adders.

Optionally, a one-dimensional model is calculated by establishing gear engagement loss through preset simulation software, and a model frame is constructed according to the physical elements and the transmission relation among the physical elements, wherein the model frame is constructed to be consistent with the actual physical state, and when the physical state is two-stage transmission, the model is also two-stage transmission.

S302, configuring transmission configuration parameters of each virtual element in the model frame according to transmission configuration operation of each virtual element in the model frame.

Optionally, according to the actual situation of the transmission, the number of discrete units of the engagement length, pitch circle radius, pressure angle, helix angle, center distance, tooth number, pressure angle, helix angle, top circle radius, root circle radius, effective tooth width, modulus and poisson ratio of each virtual element in the model frame are configured according to the model parameter setting operation in the preset simulation software. Simultaneously, the setting of working points of torque and rotating speed is completed, the torque and the rotating speed are respectively divided into nine dimensions from small to obtain 81 working conditions, the 81 working conditions are divided into 9 groups in an efficiency table, the fixed rotating speed of the torque is set to 9 different values from large to small, the torque is input through a signal receiver, and the rotating speed is set by assigning values to a time dynamic table according to 0.1s interval.

S303, configuring simulation configuration parameters of the model frame according to simulation configuration operation aiming at the loss calculation model to obtain the gear engagement loss calculation model.

Optionally, according to a simulation parameter setting operation in preset simulation software, determining a simulation start time, a simulation end time and a simulation data output interval.

The gear engagement loss calculation model of the gear engagement system constructed in advance is used as in S201 described above to calculate gear engagement loss parameters, including:

s304, acquiring target torque and target rotating speed of the transmission under a target working condition.

Optionally, according to the setting of the working condition points of the torque and the rotating speed, determining the corresponding target torque and the corresponding target rotating speed under the target working condition.

And S305, calculating by adopting a gear engagement loss calculation model according to the target torque and the target rotating speed to obtain a gear engagement loss parameter.

Optionally, the transmission configuration parameters of each virtual element in the model frame are configured according to the above, and the simulation configuration parameters of the model frame are configured. And respectively obtaining 9 groups of gear engagement loss parameters under 81 working conditions with different fixed torque and rotating speed, and determining the gear engagement loss parameters under the target rotating speed and torque from the gear engagement loss parameters under the 81 working conditions.

In the embodiment of the application, the gear engagement model frame is determined through simulation software, the gear engagement loss model is obtained through configuration of each virtual element according to actual conditions and configuration of simulation configuration parameters of the model frame, the gear engagement loss parameters are determined according to the gear engagement simulation model according to target torque and rotating speed under target working conditions, the actual test of the transmission is not needed, the test flow is simplified, the virtual elements are configured according to actual conditions, and the calculation accuracy is improved.

On the basis of the foregoing embodiments, the present embodiment further provides a fourth transmission efficiency simulation method, and fig. 4 is a schematic flow chart of the fourth transmission efficiency simulation method provided by the embodiment of the present application, as shown in fig. 4, before calculating the oil seal friction loss parameter by using the oil seal friction loss calculation model of the oil seal friction system constructed in advance in S202, the method further includes:

s401, acquiring a preset friction force calculation formula, a preset friction moment calculation formula and a preset friction power calculation formula.

Alternatively, the friction force calculation formula, the friction torque calculation formula, and the friction power calculation formula are obtained according to a friction force empirical formula.

Wherein, friction force calculation formula is: friction = dynamic friction factor x positive pressure; the friction torque calculation formula is: friction torque = friction force x distance; the friction power calculation formula is: friction power = friction force x speed.

S402, constructing an oil seal friction loss calculation model according to a set friction force calculation formula, a preset friction moment calculation formula and a preset friction power calculation.

Optionally, the friction force is calculated according to a friction force calculation formula, the friction moment is obtained according to the friction force and friction moment calculation formula, the friction force power is obtained according to the friction moment and friction power calculation formula, and the oil seal friction loss calculation model is constructed according to the calculation principle and related parameters of oil seal friction.

The oil seal friction loss calculation model of the oil seal friction system constructed in advance is adopted in S202, and the calculation of the oil seal friction loss parameters includes:

s403, acquiring the size parameter of an installation shaft where an oil seal part is located in the oil seal friction system, and presetting a unit friction parameter and a target rotating speed of the transmission under a target working condition.

Wherein the dimension parameter of the installation shaft where the oil seal part is positioned is the diameter d of the oil seal installation shaft ₀ The preset unit friction parameter is the friction force F between the oil seal lip and the circumference of the shaft ₀ The target rotational speed n of the transmission under the target operating condition.

S404, calculating oil seal friction loss parameters by adopting an oil seal friction loss calculation model according to the size of the installation shaft, preset unit friction parameters and target rotating speed.

Alternatively, the diameter d of the shaft is installed according to the oil seal ₀ Friction force F between oil seal lip and shaft circumference unit length ₀ And (3) calculating to obtain the oil seal friction force F through an oil seal friction force calculation formula (2).

F＝πd ₀ F ₀ (2)

Wherein F is oil seal friction force, d ₀ For mounting the diameter of the shaft for oil seals, F ₀ The friction force between the oil seal lip and the circumference of the shaft is equal to pi, which is the circumference ratio.

Alternatively, the diameter d of the oil seal installation shaft is determined according to the oil seal friction force F ₀ And (3) calculating to obtain the oil seal friction torque T through an oil seal friction torque calculation formula (3).

Wherein T is oil seal friction moment, F is oil seal friction force, d ₀ For mounting the diameter of the shaft for oil seals, F ₀ The friction force between the oil seal lip and the circumference of the shaft is equal to pi, which is the circumference ratio.

Optionally, according to the oil seal friction torque T and the target rotating speed n of the transmission under the target working condition, calculating to obtain an oil seal friction power loss parameter P through an oil seal friction power calculation formula (4).

Wherein P is an oil seal friction power loss parameter, T is an oil seal friction torque, N is a target rotating speed of the transmission under a target working condition, and 9550 is used for converting torque from Newton meters (N.m) to kilowatts (kW) in unit conversion.

In this application embodiment, through utilizing relevant friction calculation formula, acquire oil blanket friction loss calculation model, can make the calculation to transmission oil blanket friction loss more efficient, can obtain oil blanket friction loss through quantitative analysis oil blanket friction's influence factor, need not the experiment, it is simpler and more convenient to operate, and the data precision that obtains is higher.

On the basis of the foregoing embodiments, the present embodiment further provides a fifth transmission efficiency simulation method, and fig. 5 is a schematic flow chart of the fifth transmission efficiency simulation method provided by the embodiment of the present application, as shown in fig. 5, as before the step S203 of calculating the bearing friction loss parameter by using the bearing friction loss calculation model of the bearing friction system, which is constructed in advance, the method further includes:

s501, acquiring a shaft tooth design parameter in a bearing friction system in the transmission, and constructing a shaft tooth three-dimensional power model of the transmission.

Among the design parameters of the shaft teeth in the bearing friction system in the transmission are: calculating load, macroscopic parameters, microscopic control parameters, cutter design parameters and the like of two pairs of meshing cylindrical gears of the transmission; bearing type and model. And constructing a bearing friction loss calculation model according to bearing efficiency loss experience and transmission system analysis software through shaft tooth design parameters in a bearing friction system in the transmission.

S502, acquiring shell design parameters of the transmission, and constructing a shell three-dimensional model of the transmission.

Optionally, the housing design parameters of the transmission are three-dimensional design parameters and material properties of the transmission. And determining parameters related to a shell of the transmission according to the type of the transmission, performing three-dimensional model processing on the shell of the transmission, establishing a full finite element shell model, importing preset transmission system analysis software, and constructing a three-dimensional model of the shell of the transmission.

S503, constructing a bearing friction loss calculation model based on the shaft tooth three-dimensional dynamic model and the shell three-dimensional model.

Optionally, according to the three-dimensional dynamic model of the shaft teeth and the three-dimensional model of the shell and the relative position relationship between the shaft teeth and the shell, establishing the contact relationship between the shaft teeth and the shell and setting corresponding parameters, thereby establishing the bearing friction loss calculation model. Wherein the corresponding parameters include: friction coefficient, load conditions, bearing coefficient, and bearing lubrication factor.

The corresponding parameter tables are as follows: table 1 is a table of friction coefficient, fig. 6 is a schematic diagram of bearing condition, table 2 is a table of bearing coefficient, and table 2 is a table of bearing lubrication factor.

For example, table 1 is a friction coefficient table provided in the embodiment of the present application, and as shown in table 1, the friction coefficient table includes bearing types, friction coefficients corresponding to different bearing types, and equivalent dynamic loads corresponding to different bearing types. P (P) ₀ For equivalent static bearing load, C _o For the base static load rate, fa is the bearing dynamic load axial component, fr is the bearing dynamic load radial component, Y and Y2 are the axesTo the load factor.

Table 1 coefficient of friction table

FIG. 6 is a schematic diagram of a bearing operating condition according to an embodiment of the present application, as shown in FIG. 6, including a load operating condition and an axial load, F _rA And F _rB Radial component of dynamic load of bearing for A, B two objects, Y _A And Y _B For the load factor of A, B, F _aA And F _aB For the axial component of dynamic load of the bearing of A, B two objects, K _a Is a coefficient under different load conditions. When K is _a When the load working condition is from the object B to the object A, three load working conditions exist, and when the load working condition is thatAnd K is _a When not less than 0, the weight is added>F _aB ＝F _aA +K _a The method comprises the steps of carrying out a first treatment on the surface of the When the load condition is +.>And->When (I)>F _aB ＝F _aA +K _a The method comprises the steps of carrying out a first treatment on the surface of the When the load condition is +.>And-> When F _aA ＝F _aB -K _a ，When K is _a When the load condition is +.A, three load conditions exist from object A to object B, when the load condition is +.>And K is _a F when not less than 0 _aA ＝F _aB +K _a ，When the load condition is +.>And->When F _aA ＝F _aB +K _a ，When the load condition is +.>And-> When (I)>F _aB ＝F _aA -K _a 。/>

For example, table 2 is a table of bearing coefficients provided in the embodiments of the present application, and as shown in table 2, the bearing coefficients table includes a series of ball bearings and A, B coefficients of different series corresponding to the ball bearings.

Table 1 bearing coefficient table

For example, table 3 shows a bearing lubrication factor table provided in the embodiment of the present application, where the bearing lubrication factor table includes different types of bearings and lubrication factors f corresponding to the different types of bearings as shown in table 3 ₂ 。

The calculation of the bearing friction loss parameter using the bearing friction loss calculation model of the bearing friction system constructed in advance as in S203 described above includes:

s504, acquiring target torque and target rotating speed of the transmission under a target working condition.

Optionally, according to a plurality of working conditions of the transmission, determining the corresponding target torque and target rotating speed under the target working conditions.

And S505, calculating by adopting a bearing friction loss calculation model according to the target torque and the target rotating speed to obtain a bearing friction loss parameter.

Optionally, the bearing power loss P is calculated by adopting a bearing power loss formula (5) in a bearing friction loss calculation model ₂ 。

Wherein P is obtained by adopting the formula (6) _Ai 。

Wherein M is ₁ For friction torque caused by bearing load, M ₂ Friction torque is generated for the bearing under axial force. Calculating the friction moment M caused by the bearing load by adopting a formula (7) ₁ . Calculating friction moment M generated by bearing under axial force by adopting formula (8) ₂ 。

Wherein f ₁ For the coefficient of friction, p in Table 1 ₁ D is the corresponding equivalent dynamic load _m The average diameter of the bearings is shown in Table 2, and A and B are coefficients corresponding to different bearings.

Wherein f ₂ For the lubrication factor in Table 4, F _a Is the axial force of the bearing, d _m Is the average diameter of the bearing.

In the embodiment of the application, the bearing loss parameters are calculated by establishing a bearing loss calculation model, firstly, a vertical shaft tooth model is established, a shell model is established through full finite elements, and the bearing loss calculation model is established through the shaft teeth and the shell building related parameters, so that the relation between the shaft teeth is considered, the influence of the shell on the load deformation quantity of the shaft tooth part is considered, and the accuracy of the calculation result is higher.

On the basis of the foregoing embodiments, the present embodiment further provides a sixth transmission efficiency simulation method, and fig. 7 is a schematic flow chart of the sixth transmission efficiency simulation method provided by the embodiment of the present application, as shown in fig. 7, and before calculating the churning loss parameter by using the churning loss calculation model of the pre-constructed churning system in S204, the method further includes:

s701, acquiring a three-dimensional geometric model of the transmission.

Optionally, the transmission is modeled according to the actual size of the corresponding model of the transmission, so that a three-dimensional geometric model of the transmission is obtained.

S702, splitting parts of the three-dimensional geometric model to obtain a three-dimensional geometric model of a plurality of parts.

Optionally, adding the three-dimensional combined model to three-dimensional high-performance numerical calculation software for carrying out part splitting on the three-dimensional geometric model, wherein the three-dimensional high-performance numerical calculation software is used for calculating and simulating the model, and dividing the model into different part groups according to classification modes such as a shell, a shaft, a bearing and the like to obtain the three-dimensional geometric model of a plurality of parts.

S703, adding three-dimensional geometric models of a plurality of parts in a solid domain, and configuring fluid motion parameters for the three-dimensional geometric models of the parts in a fluid domain to obtain an oil stirring loss calculation model.

Optionally, adding the three-dimensional geometric model of the parts obtained after grouping to a solid domain, and configuring a corresponding fluid domain for the solid domain, wherein the type of the fluid domain is set to select horizontal liquid from splash lubrication, when the fluid domain is set, reference points of the fluid domain cannot be placed in a closed space except for a non-shell cavity or cannot interfere with the parts, and a physical column in the fluid domain setting inputs oil parameters, so that the oil stirring loss model is obtained.

As described above in S204, calculating the churning loss parameter using the churning loss calculation model of the churning system constructed in advance, includes:

s704, configuring corresponding rotation configuration parameters for the three-dimensional geometric model of the target part in the solid domain.

The target part is a rotary motion part, namely a solid domain type of rotating shaft teeth in a solid domain, the rotary motion part is a rotating body, and the motion parameters at least comprise the rotating speed of the rotating body. After the moving body is determined, a moving parameter, a rotation direction, and a rotation center are set for the rotating body.

And S705, calculating by adopting an oil stirring loss calculation model according to the first preset fluid configuration parameter and the preset output interval information to obtain an oil stirring loss parameter.

Optionally, determining a calculation area of the oil stirring loss calculation model, setting a particle radius according to the calculation area, ensuring that the total number of particles in the first preset fluid is kept between 50 ten thousand and 100 ten thousand, setting the gravity direction of the first preset fluid, setting three items of turbulence mode, wall viscosity mode and fluid movement for the first preset fluid in simulation software, setting a time interval according to the actual condition of the current transmission, wherein the time interval is generally 0.05 seconds, can also be 0.04 seconds, 0.06 seconds and the like, and specifically is determined according to the model of the transmission. And determining a curve of time and oil stirring loss according to the output interval information of the rotation configuration parameters of the solid domain and the first preset fluid configuration parameters of the fluid domain, and obtaining the oil stirring loss parameters after the curve is stable.

In the embodiment of the application, the three-dimensional geometric model of a plurality of parts is added in the solid domain, the corresponding fluid domain is set, and the first preset fluid configuration parameters of the fluid domain are calculated by solving a particle method, so that the method has the remarkable advantages of short simulation period, high model precision, simplicity and convenience in operation and the like.

On the basis of the foregoing embodiments, the present embodiment further provides a seventh transmission efficiency simulation method, and fig. 8 is a schematic flow chart of the seventh transmission efficiency simulation method provided by the embodiment of the present application, as shown in fig. 8, before calculating the synchronous drag loss parameter by using the pre-constructed synchronous drag loss calculation model of the synchronous drag system in S205, the method further includes:

s801, a stress calculation formula, a moment calculation formula and a power calculation formula of a synchronous ring and a synchronous cone in a synchronous dragging system are obtained.

Optionally, the force calculation formula, the moment calculation formula, and the power calculation formula are obtained according to a one-dimensional calculation formula. Wherein force = gravity x angle cosine value; moment = force x coefficient of friction x distance; power= (torque x rotational speed)/9550.

S802, constructing a synchronous drag loss calculation model according to the stress calculation formula, the moment calculation formula and the power calculation formula.

Optionally, the stress is obtained according to a stress calculation formula, the moment is obtained through the stress and moment calculation formula, the synchronous drag loss is obtained according to the moment and power calculation formula, and the synchronous drag loss calculation model can be obtained through the stress calculation formula, the moment calculation formula, the power calculation formula and the related parameters of the synchronizer.

As described above in S205, the synchronous drag loss calculation model of the synchronous drag system constructed in advance is used to calculate the synchronous drag loss parameter, including:

s803, acquiring the gravity parameter of the synchronizing ring and the relative position parameter of the synchronizing ring and the synchronizing cone.

The drag friction loss of the non-gear synchronizing ring in the synchronizer is mainly determined by the self gravity of the synchronizing ring, and the power loss is calculated through the self gravity of the synchronizing ring. The gravity parameter of the synchronizing ring is synchronizing ring gravity parameter F, the relative position of the synchronizing ring and the synchronizing cone is the included angle theta between the conical surface of the synchronizing ring and the axis, and the synchronizing cone and the synchronizing ring are in contact with the equivalent radius R ₀ 。

S804, calculating synchronous dragging loss parameters by adopting a synchronous dragging loss calculation model according to the gravity parameters, the relative position parameters, the preset friction coefficients of the synchronous ring and the synchronous cone and the target rotating speed of the transmission under the target working condition.

Optionally, according to the gravity parameter G of the synchronizing ring and the included angle theta between the conical surface of the synchronizing ring and the axis, obtaining positive pressure F between the synchronizing cone and the synchronizing ring through a stress calculation formula (9) _N 。

F _N ＝Gcosθ (9)

Optionally according to positive pressure F between synchronizer rings _N Contact equivalent radius R between synchronous cone and synchronous ring ₀ And obtaining the moment loss T through a moment calculation formula (10).

T＝μF _N R ₀ (10)

Wherein, according to the larger radius r of the contact surface between the synchronous cone and the synchronous ring _a Contact surface between synchronous cone and synchronous ring has smaller radius r _i The contact equivalent radius R between the synchronous cone and the synchronous ring is calculated by a contact equivalent radius calculation formula (11) between the synchronous cone and the synchronous ring ₀ 。

Optionally, according to the torque loss T and the target rotating speed n of the transmission under the target working condition, calculating to obtain the synchronous dragging loss parameter under the target working condition through a power calculation formula (12).

In the embodiment of the application, the synchronous dragging loss calculation model is obtained by utilizing the related synchronous dragging related mechanical calculation formula, so that the calculation of the synchronous dragging loss of the transmission is more efficient, the synchronous dragging loss can be obtained by quantitatively analyzing the influence factors of the synchronous dragging, an experiment is not needed, the operation is simpler and more convenient, and the obtained data precision is higher.

On the basis of the foregoing embodiments, the present embodiment further provides an eighth transmission efficiency simulation method, and fig. 9 is a schematic flow chart of the eighth transmission efficiency simulation method provided by the present embodiment, as shown in fig. 9, and before calculating the clutch drag loss parameter by using the pre-built clutch drag loss calculation model of the clutch drag system in S205, the method further includes:

s901, acquiring a three-dimensional geometric model of each clutch part in the clutch drag system.

Optionally, determining a plurality of parts related to clutch drag in the transmission according to the type of the transmission, modeling the plurality of parts to obtain a three-dimensional geometric model of each clutch part in the clutch drag system, guiding a surface grid of the three-dimensional geometric model of each clutch part into fluid mechanics analysis software, determining whether the three-dimensional geometric model of each clutch part is complete, repairing the three-dimensional geometric model of the incomplete part through the fluid mechanics analysis software, dividing the three-dimensional geometric model into an inlet, an outlet, a clutch input end, a steel sheet, a clutch output end and a friction sheet in total, and determining a continuum in the three-dimensional geometric model of each clutch part.

S902, configuring a physical turbulence model, surface grid parameters and rotation motion parameters for the three-dimensional geometric model of each clutch part to obtain a clutch drag loss calculation model.

By way of example, a physical turbulence model was configured for a continuum in the three-dimensional geometric model of each clutch component, and the face mesh of the three-dimensional geometric model of each clutch component was set to a base size of 2.2mm, the total thickness of the boundary layer was 0.22mm (10% of the base size), and the minimum surface size was 0.22mm (10% of the base size). The embodiment of the application does not limit the grid size, and only needs to control the reasonable number of the grids, so that the flow details can be captured. When the length dimension of the maximum main body of the object is 1m, 40-100 grids are arranged in the length range of 1m, when the number of grids is too large, the calculation time is too long, and when the number of grids is too small, the obtained simulation result is distorted. Local encryption can be performed on local key parts of the model, and a large number of grids are arranged. The specific setting can be carried out according to the specific model and the simulation precision requirement of the transmission, and the embodiment of the application does not require the specific model and the simulation precision requirement. Determining a rotating body in the continuum, and setting a rotation parameter for the rotating body, the rotation parameter comprising: the rotation speed, the reference coordinate system and the boundary reference coordinate are used for obtaining the clutch drag loss calculation model.

As described above in S205, the clutch drag loss calculation model of the clutch drag system constructed in advance is used to calculate the clutch drag loss parameter, including:

s903, calculating by adopting a clutch drag loss calculation model according to a second preset fluid configuration parameter to obtain a clutch drag loss parameter.

Optionally, the inlet of the second preset fluid is set as a mass flow inlet, the volume fraction [1,0] represents that all the oil flowing into the inlet is free of air, the mass flow is filled according to the actual situation, the outlet boundary condition is designated as a pressure outlet, and the pressure is set as the pressure of the external atmosphere to be consistent. And (3) adopting a clutch drag loss calculation model to start calculation, and stopping calculation after the change curve result of the drag torque is converged, so as to obtain the clutch drag loss at the current rotating speed.

Based on the same inventive concept, the embodiment of the application also provides a transmission efficiency simulation device corresponding to the transmission efficiency simulation method of the transmission, and because the principle of solving the problem of the device in the embodiment of the application is similar to that of the transmission efficiency simulation method of the embodiment of the application, the implementation of the device can refer to the implementation of the method, and the repetition is omitted.

Fig. 10 is a schematic structural diagram of a transmission efficiency simulation device provided in an embodiment of the present application, as shown in fig. 10, the device includes: a first calculation module 101, a second calculation module 102, a third calculation module 103; the first calculation module 101 is configured to calculate loss parameters of each transmission subsystem by using a loss calculation model of each transmission subsystem in the transmission;

a second calculation module 102, configured to calculate a power loss parameter of the transmission according to the loss parameters of each transmission subsystem;

the third calculation module 103 is configured to calculate a transmission efficiency of the transmission under the target working condition according to the input power parameter of the transmission under the target working condition and the power loss parameter.

In one possible embodiment, each transmission subsystem includes: the device comprises a gear engagement system, an oil seal friction system, a bearing friction system, an oil stirring system, a synchronous dragging system and a clutch dragging system; the first computing module 101 is specifically configured to: calculating a gear engagement loss parameter by adopting a gear engagement loss calculation model of a pre-constructed gear engagement system;

calculating oil seal friction loss parameters by adopting a pre-constructed oil seal friction loss calculation model of an oil seal friction system;

Calculating a bearing friction loss parameter by adopting a bearing friction loss calculation model of a pre-constructed bearing friction system;

calculating oil stirring loss parameters by adopting a pre-constructed oil stirring loss calculation model of an oil stirring system;

adopting a synchronous dragging loss calculation model of a pre-built synchronous dragging system to calculate synchronous dragging loss parameters;

and calculating clutch drag loss parameters by adopting a clutch drag loss calculation model of a pre-constructed clutch drag system.

In a possible implementation manner, the first computing module 101 is further configured to: constructing a model frame according to the transmission relation of physical elements of the gear meshing system, and configuring transmission configuration parameters of each virtual element in the model frame according to transmission configuration operation aiming at each virtual element in the model frame; and configuring simulation configuration parameters of the model frame according to simulation configuration operation aiming at the loss calculation model to obtain the gear engagement loss calculation model.

In a possible implementation manner, the first computing module 101 is specifically configured to: acquiring target torque and target rotating speed of the transmission under a target working condition; and calculating by adopting a gear engagement loss calculation model according to the target torque and the target rotating speed to obtain a gear engagement loss parameter.

In a possible implementation manner, the first computing module 101 is further configured to: acquiring a preset friction force calculation formula, a preset friction moment calculation formula and a preset friction power calculation formula;

and constructing an oil seal friction loss calculation model according to the set friction force calculation formula, the preset friction moment calculation formula and the preset friction power calculation.

In a possible implementation manner, the first computing module 101 is specifically configured to: acquiring a size parameter of an installation shaft where an oil seal part is located in an oil seal friction system, a preset unit friction parameter and a target rotating speed of a transmission under a target working condition;

and calculating the oil seal friction loss parameter by adopting an oil seal friction loss calculation model according to the size of the installation shaft, the preset unit friction parameter and the target rotating speed.

In a possible implementation manner, the first computing module 101 is further configured to: acquiring a shaft tooth design parameter in a bearing friction system in a transmission, and constructing a shaft tooth three-dimensional power model of the transmission;

acquiring shell design parameters of a transmission, and constructing a shell three-dimensional model of the transmission;

constructing a bearing friction loss calculation model based on the shaft tooth three-dimensional dynamic model and the shell three-dimensional model;

In a possible implementation manner, the first computing module 101 is specifically configured to: the method includes the steps of obtaining target torque and target rotating speed of the transmission under a target working condition.

And calculating by adopting a bearing friction loss calculation model according to the target torque and the target rotating speed to obtain a bearing friction loss parameter.

In a possible implementation manner, the first computing module 101 is further configured to: acquiring a three-dimensional geometric model of the transmission;

adding three-dimensional geometric models of a plurality of parts in a solid domain, and configuring fluid motion parameters for the three-dimensional geometric models of the parts in a fluid domain to obtain an oil stirring loss calculation model;

in a possible implementation manner, the first computing module 101 is specifically configured to: configuring corresponding rotation configuration parameters for a three-dimensional geometric model of a target part in a solid domain, wherein the target part is a rotation movement part;

and calculating by adopting an oil stirring loss calculation model according to the first preset fluid configuration parameter and preset output interval information to obtain an oil stirring loss parameter.

In a possible implementation manner, the first computing module 101 is further configured to: the method comprises the steps of obtaining a stress calculation formula, a moment calculation formula and a power calculation formula of a synchronous ring and a synchronous cone in a synchronous dragging system;

Constructing a synchronous drag loss calculation model according to the stress calculation formula, the moment calculation formula and the power calculation formula;

in a possible implementation manner, the first computing module 101 is specifically configured to: acquiring a gravity parameter of a synchronizing ring and a relative position parameter of the synchronizing ring and a synchronizing cone;

and calculating synchronous dragging loss parameters by adopting a synchronous dragging loss calculation model according to the gravity parameters, the relative position parameters, the preset friction coefficients of the synchronous ring and the synchronous cone and the target rotating speed of the transmission under the target working condition.

In a possible implementation manner, the first computing module 101 is further configured to: acquiring a three-dimensional geometric model of each clutch part in the clutch drag system;

a physical turbulence model, surface grid parameters and rotation motion parameters are configured for the three-dimensional geometric model of each clutch part, so that a clutch drag loss calculation model is obtained;

in a possible implementation manner, the first computing module 101 is specifically configured to: and calculating by adopting a clutch drag loss calculation model according to the second preset fluid configuration parameters to obtain clutch drag loss parameters.

The process flow of each module in the apparatus and the interaction flow between the modules may be described with reference to the related descriptions in the above method embodiments, which are not described in detail herein.

Fig. 11 is a schematic structural diagram of a computer device according to an embodiment of the present application, where, as shown in fig. 11, the schematic structural diagram of the computer device according to an embodiment of the present application includes: processor 111, memory 112, and optionally bus 113 may also be included. The memory 112 stores machine readable instructions executable by the processor 111, which when the computer device is running, are communicated between the processor 111 and the memory 112 via a bus 113, the machine readable instructions being executed by the processor 111 to perform the steps of any of the transmission efficiency simulation methods described above.

Embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor performs the steps of any of the transmission efficiency simulation methods described above.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the method embodiments, which are not described in detail in this application. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, and the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, and for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, indirect coupling or communication connection of devices or modules, electrical, mechanical, or other form.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are covered in the protection scope of the present application.

Claims

1. A transmission efficiency simulation method, the method comprising:

calculating loss parameters of all transmission subsystems by adopting a loss calculation model of all transmission subsystems in a transmission;

2. The method of claim 1, wherein each of the transmission subsystems comprises: the device comprises a gear engagement system, an oil seal friction system, a bearing friction system, an oil stirring system, a synchronous dragging system and a clutch dragging system; the method for calculating the loss parameters of each transmission subsystem by adopting the loss calculation model of each transmission subsystem in the transmission comprises the following steps of:

3. The method of claim 2, wherein prior to calculating the gear mesh loss parameter using a pre-constructed gear mesh loss calculation model of the gear mesh system, the method further comprises:

4. The method of claim 2, wherein prior to calculating the oil seal friction loss parameters using a pre-constructed oil seal friction loss calculation model of the oil seal friction system, the method further comprises:

5. The method of claim 2, wherein prior to calculating the bearing friction loss parameters using a pre-constructed bearing friction loss calculation model of the bearing friction system, the method further comprises:

6. The method of claim 2, wherein prior to calculating churning loss parameters using a pre-built churning loss calculation model of the churning system, the method further comprises:

acquiring a three-dimensional geometric model of the transmission;

7. The method of claim 2, wherein prior to calculating the synchronous drag loss parameters using a pre-built synchronous drag loss calculation model of the synchronous drag system, the method further comprises:

8. The method of claim 2, wherein prior to calculating clutch drag loss parameters using a pre-built clutch drag loss calculation model of the clutch drag system, the method further comprises:

9. A transmission efficiency simulation apparatus, the apparatus comprising:

10. A computer device, comprising: a processor and a memory storing machine readable instructions executable by the processor to perform the steps of the transmission efficiency simulation method of any one of claims 1 to 8 when the computer device is running.