CN110702404A - Method, device and equipment for measuring temperature of clutch and storage medium - Google Patents
Method, device and equipment for measuring temperature of clutch and storage medium Download PDFInfo
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- CN110702404A CN110702404A CN201910812304.0A CN201910812304A CN110702404A CN 110702404 A CN110702404 A CN 110702404A CN 201910812304 A CN201910812304 A CN 201910812304A CN 110702404 A CN110702404 A CN 110702404A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- Mechanical Operated Clutches (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention discloses a method, a device, equipment and a storage medium for measuring the temperature of a clutch, which receive clutch state parameters input by a user; inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions. The problem that the friction plate ablation can be found and solved only by a bench test or a whole vehicle test method in the prior art is solved, the temperature of the friction plate is calculated by a simulation method, and the risk of thermal failure of the clutch is identified and avoided.
Description
Technical Field
The embodiment of the invention relates to the technical field of automatic transmissions, in particular to a method, a device, equipment and a storage medium for measuring clutch temperature.
Background
The wet clutch is widely applied to automatic transmissions due to the advantages of smooth and soft power transmission, long service life and the like, and the thermal failure risk and the thermal characteristics of elements of the wet clutch have important influence on the reliability and the thermal performance of the whole vehicle. At present, means for evaluating the thermal failure risk of the clutch mainly depend on a rack and a whole vehicle thermal balance working condition test. Therefore, the problems related to the thermal failure of the clutch cannot be predicted and designed in the forward direction at the initial stage of design, the later-stage test verification period is long, the development progress is seriously influenced, and the verification cost is increased.
Disclosure of Invention
The invention provides a method, a device, equipment and a storage medium for measuring the temperature of a clutch, which can be used for evaluating the thermal performance of a system at the initial stage of product development by calculating the temperature of each part of a wet clutch through a simulation method and identifying and avoiding the risk of thermal failure of the system.
In a first aspect, an embodiment of the present invention provides a method for measuring a clutch temperature, where the method includes:
receiving a clutch state parameter input by a user;
inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions.
In a second aspect, an embodiment of the present invention further provides a device for measuring a clutch temperature, where the device includes:
the receiving module is used for receiving clutch state parameters input by a user;
the input module is used for inputting the clutch state parameters to a pre-established clutch thermal model to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions.
In a third aspect, an embodiment of the present invention further provides an apparatus, where the apparatus includes:
one or more processors;
a memory for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method of measuring clutch temperature as described in the above first aspect.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the method for measuring the clutch temperature as described in the first aspect.
The embodiment of the invention provides a method, a device, equipment and a storage medium for measuring the temperature of a clutch, wherein the method, the device, the equipment and the storage medium receive clutch state parameters input by a user; inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions. The problem that the friction plate is burnt only by a bench test or a whole vehicle test method in the prior art is solved, the temperature of each part of the wet clutch is calculated by a simulation method, the thermal performance of the system can be evaluated at the initial stage of product development, and the risk of thermal failure of the system is identified and avoided.
Drawings
FIG. 1 is a flow chart of a method for measuring clutch temperature according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for measuring clutch temperature according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a clutch temperature measuring device according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for measuring a clutch temperature according to an embodiment of the present invention, where the present embodiment is applicable to a case where a temperature of a clutch is measured under different operating conditions by a simulation method, and the method may be performed by a device for measuring a clutch temperature, and the device may be implemented by software and/or hardware. The measuring device for the clutch temperature is integrated in the terminal device, i.e. the measurement of the clutch temperature is performed by the terminal. The terminal includes, but is not limited to, mobile terminals such as notebook computers, smart phones and tablet computers, and fixed terminals such as digital TVs and desktop computers.
As shown in fig. 1, the method for measuring the clutch temperature provided by the embodiment of the present invention mainly includes the following steps:
and S110, receiving a clutch state parameter input by a user.
In the present embodiment, the clutch means a device provided between the engine and the transmission. During running of the automobile, the clutch can be controlled to be combined or separated, so that the engine and the gearbox are temporarily separated and gradually connected, and the power input by the engine to the transmission is cut off or transmitted. The clutches in the present embodiment are referred to as wet dual clutches.
The clutch state parameter can be understood as a parameter which characterizes the clutch operating state, for example: combined pressure, differential rotational speed, lubricant temperature, etc.
Note that, the clutch state parameter in the present embodiment is input by the user. The clutch state parameter input by the user is received, and may be the clutch state parameter input by the user through an input device of the terminal. The input device can be a touch display screen of the terminal, and can also be an external input device such as a keyboard, a mouse and the like. In the present embodiment, only the clutch state parameter for receiving the user input is described, but not limited.
S120, inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions.
In the embodiment, the thermal model of the clutch can be understood as a model capable of calculating or simulating temperature values of various parts of the clutch under various working conditions of the clutch. The thermal model of the clutch may determine the temperature of the various components based on the state parameters. Each part comprises: friction disks, flywheels, crankshafts, driven disks, pressure plates, and the like. In the present embodiment, the members are preferably friction plates.
Further, different operating conditions may be understood as different operating states of the clutch. Each operating condition may be represented by a different state parameter.
The clutch parameters under different working conditions are input into the clutch thermal model, so that the temperatures of the friction plates of the clutch under different working conditions can be obtained, and the reasons of thermal failure can be analyzed according to the temperatures of the friction plates under different working conditions.
On the basis of the above embodiment, the method further includes: a clutch thermal model is established. The step of establishing the clutch thermal model may be performed before S110.
Establishing the clutch thermal model includes: establishing a clutch heat production sub-model; and establishing a clutch heat transfer sub-model, and integrating the clutch heat production sub-model and the clutch heat transfer sub-model to obtain a clutch thermal model.
Further, a corresponding relation table between the clutch combination pressure, the rotating speed difference, the lubricating oil temperature and the friction factor is established, and the relation table can be packaged to form a friction factor assembly; the encapsulated friction factor assembly has three inputs and an output, the inputs including: a combined pressure input end, a combined rotating speed difference input end and a lubricating oil temperature input end. The output end refers to a friction factor output end. The engagement pressure input is for receiving a user input of a clutch engagement pressure. The combined speed difference input end is used for receiving the clutch speed difference input by the user. The lubricating oil temperature input end is used for receiving lubricating oil temperature input by a user. The friction factor output end is used for outputting a determined friction factor according to various parameters of the input end. Further, the corresponding relation table between the clutch combination pressure-rotating speed difference-lubricating oil temperature-friction factor can be obtained through bench test.
And determining a clutch friction torque formula, wherein the clutch friction torque can be obtained by formula calculation according to the clutch friction factor, the combination pressure and the clutch structure parameters. And packaging the friction torque formula to form a friction torque assembly. The friction torque subassembly after the encapsulation has two inputs and an output, and the input includes: the friction factor input end is connected with the friction factor output end of the friction factor assembly and used for receiving the friction factor output by the friction factor output end. The bonding pressure input end is used for receiving bonding pressure input by a user. The output end is used for outputting friction torque.
And determining a clutch friction heat production formula, wherein the clutch friction heat production power can be obtained by calculating through the friction heat production formula according to the clutch friction torque and the combined rotating speed difference. And packaging the friction heat generating formula to form a friction heat generating component. The encapsulated friction heat generating assembly has a friction torque input, a combined rotational speed difference input and a friction heat generating power output, the friction torque input being connected to the output of the friction torque assembly. The friction heat generation power output end is used for outputting friction heat generation power of the clutch.
And the friction factor component, the friction torque component and the friction heat-generating component are sequentially connected, the output end of the friction heat-generating component is used as the output end of the clutch heat-generating sub-model, and the clutch heat-generating sub-model is completely established.
Further, a mass block dividing assembly is established, the mass block dividing assembly comprises a complete simulation structure of the wet clutch, and the simulation structure of the wet clutch is divided according to structural characteristics. The division of the mass block of the wet clutch can be divided to different degrees according to different requirements, but places where the temperature is required to be calculated are divided separately, for example, the temperature of a friction plate is required to be calculated, and the friction plate is divided into one mass block separately.
Establishing a three-dimensional flow field simulation component; the three-dimensional flow field simulation assembly stores the characteristic speed and volume fraction of lubricating oil on each mass block extracted by performing three-dimensional flow field simulation on the wet clutch under different working conditions.
And establishing a heat exchange coefficient assembly, and calculating the convection heat exchange coefficient of each mass block according to the characteristic speed and the volume fraction of the lubricating oil on each mass block.
And sequentially connecting the mass block dividing assembly, the three-dimensional flow field simulation assembly and the heat exchange coefficient assembly to establish a clutch heat transfer sub-model.
And integrating the established clutch heat generation sub-model and the clutch heat transfer sub-model, and transferring the heat generated in the wet clutch heat generation model to a corresponding mass block in the wet clutch heat transfer model to form a wet clutch thermal model, namely calculating the temperature of each part of the wet clutch under different working conditions. The establishment of the wet clutch thermal model described above can be implemented using AMEsim software.
According to the method for measuring the temperature of the clutch, provided by the embodiment of the invention, the clutch state parameter input by a user is received; inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions. The problem that the friction plate is burnt only by a bench test or a whole vehicle test method in the prior art is solved, the temperature of each part of the wet clutch is calculated by a simulation method, the thermal performance of the system can be evaluated at the initial stage of product development, and the risk of thermal failure of the system is identified and avoided.
Example two
On the basis of the above embodiments, the method for measuring the clutch temperature is further optimized in the embodiments of the present invention, fig. 2 is a flowchart of a method for measuring the clutch temperature provided in the second embodiment of the present invention, and the optimized method for measuring the clutch temperature mainly includes:
and S210, receiving a clutch state parameter input by a user.
S220, inputting the state parameters of the clutch to a clutch heat production sub-model to obtain clutch heat production power; the clutch heat production sub-model stores the relationship between the clutch state parameters and the heat production power under various working conditions.
As can be seen from the process of constructing the clutch heat generation model in the above embodiment, the clutch heat generation sub-model includes: a friction factor component, a friction torque component and a friction heat generating component. The relationship of the clutch state parameter to the heat-generating power includes: the relation between the state parameter when the clutch is in the engaged state and the friction heat-generating power of the clutch and the relation between the state parameter when the clutch is in the disengaged state and the dragging heat-generating power of the clutch.
The relation between the state parameter when the clutch is in the combined state and the friction heat generating power of the clutch is determined by the relation between the combination pressure, the combination rotating speed difference, the lubricating oil temperature and the friction factor when the clutch is in the combined state; a relationship between friction factor and friction torque; and friction torque, in combination with the relationship between the rotational speed difference and the frictional heat generating power.
When the clutch is packaged in the friction factor component and is in a combined state, the friction factor component is packaged with the relationship among the combination pressure, the combination rotating speed difference, the lubricating oil temperature and the friction factor, the friction torque component is packaged with the relationship among the friction factor and the friction torque, and the friction heat generating component is packaged with the relationship among the friction torque, the combination rotating speed difference and the friction heat generating power.
In the embodiment, the combination pressure, the combination rotating speed difference and the lubricating oil temperature of the clutch combination state input by a user are received and sent to the friction factor assembly, the friction factor assembly is searched in a relation table packaged in the friction factor assembly, and the friction factor corresponding to the combination pressure, the combination rotating speed difference and the lubricating oil temperature of the clutch combination state is determined. The determined friction factor is output to the friction torque assembly.
The friction torque is determined from a relationship between a friction factor and a friction torque packaged in the friction torque assembly. The relationship between friction factor and friction torque is:
wherein T is friction torque, R is outer diameter of the friction plate, R is inner diameter of the friction plate, mu is friction factor, p is combination pressure, A is effective area of the actuating piston, and N is friction surface number. The combination pressure and the friction factor are substituted into the formula, and the friction torque is calculated. Wherein, R is the outer diameter of the friction plate, R is the inner diameter of the friction plate, A is the effective area of the actuating piston, and N is the structural parameter of the friction surface which is the clutch, and the friction surface is packaged in the friction torque assembly in advance.
The frictional heat generating power is determined from a relationship between the frictional torque and the frictional heat generating power encapsulated in the frictional heat generating component. The relationship between friction torque and friction heat generation power is: p ═ T × (ω)1-ω2) Where P is power, T is torque, ω1For the rotation speed of the active end, omega2The driven end rotation speed. And taking the difference between the rotating speed of the driving wheel and the rotating speed of the driven wheel as a rotating speed difference. And substituting the combination of the rotating speed difference and the friction torque into the formula, and calculating to obtain the heat generating power of the clutch.
And S230, inputting the state parameters of the clutch and the heat generation power of the clutch to a clutch heat transfer sub-model to obtain the temperature of each part of the clutch corresponding to the state parameters, wherein the relationship between the heat generation power and the temperature of each part is stored in the clutch heat transfer sub-model.
And transmitting the heat generating power to a corresponding mass block in a clutch heat transfer model, and calculating the temperature of each part in the wet clutch under different working conditions in the heat exchange coefficient assembly.
The clutch heat transfer sub-model stores the relationship between the clutch state parameter and the heat production power and the temperature values of all the parts, wherein the relationship between the clutch state parameter and the heat production power and the temperature values of all the parts is determined by the relationship between the clutch state parameter and the convection heat transfer coefficient of all the parts and the relationship between the clutch heat production power and the convection heat transfer coefficient of all the parts and the temperature of all the parts.
Wherein the relationship between the state parameter of the clutch and the convective heat transfer coefficient of each part comprises the relationship between the convective heat transfer coefficient of the oil groove of the friction plate and the convective heat transfer coefficient of the oil channel of the clutch,
the convective heat transfer coefficient of the clutch gallery can be calculated as follows.
When the lubricating oil is in a laminar flow state in the oil groove of the friction plate, namely Re <2300, the calculation formula of the flow heat exchange coefficient is as follows:
when the lubricating oil is in a turbulent flow state in the oil groove of the friction plate, namely Re is more than 2300, the calculation formula of the heat transfer coefficient of the flow is as follows:
l/de≥50,Re＝104～1.2×105,Pr＝0.6～120
in the formula, k is the heat conductivity coefficient of the lubricating oil; l is the length of the slot; deIs the equivalent diameter of the oil groove, de4f/U, where f is the cross-sectional area of the channel and U is the wetted perimeterLength; v is the characteristic velocity along the axial direction of the oil groove; epsilonRCorrection factor of helical oil groove, epsilonR＝1+10.3(deR), wherein R is the radius of the spiral groove; h is the dynamic viscosity of the lubricating oil; h isf，hwThe dynamic viscosity at the average temperature of the lubricating oil and the average temperature of the wall surface; v is the kinematic viscosity of the lubricating oil; cpThe specific heat capacity of the lubricating oil is; the characteristic parameters of the oil in Re and Pr are taken as the characteristic parameters at the average fluid temperature.
If the part is a rotating element, the convective heat transfer coefficient of the peripheral surface of the rotating element is calculated by adopting the following formula:
wherein D is the diameter of the peripheral surface of the rotating element; w is the rotational angular velocity of the rotating element.
The convective heat transfer coefficient of the side surface of the rotating element was calculated as follows.
When the lubricating oil is in a laminar flow on the side of the rotating element, i.e. Re < 2X 105And then, the convective heat transfer coefficient is calculated by adopting the following formula:
when the lubricating oil is in a transitional flow state at the side of the rotating element, i.e. 2X 105＜Re＜2.5×105And then, the convective heat transfer coefficient is calculated by adopting the following formula:
when the lubricating oil is in a turbulent state on the side of the rotating element, i.e., Re > 2.5X 105Then, the convective heat transfer coefficient is calculated by the following formula:
wherein m is a constant and is used for defining the distribution condition of the temperature of the disc along the radial direction, and m is 2; r iscIs the radius of the rotating element.
In the calculation of the convective heat transfer coefficient, attention needs to be paid to the influence of the volume fraction of the lubricating oil on the surface of the mass block, the volume fraction of the lubricating oil is the proportion of the lubricating oil in the oil-gas mixture and can be obtained through three-dimensional flow field simulation, and the volume fraction of the lubricating oil influences the characteristic parameters of the oil-gas mixture, such as density, kinematic viscosity, dynamic viscosity, heat conductivity coefficient, specific heat capacity and the like. Taking the density of the oil-gas mixture as an example, the density of the oil-gas mixture is the product of the volume fraction of the lubricating oil and the density of the lubricating oil plus 1 minus the volume fraction of the lubricating oil and the density of air.
The temperature value calculation formula of each mass block is as follows:
wherein phiinFor inputting thermal power, [ phi ]outFor the output of thermal power, m is the mass of the mass, CpIs the specific heat capacity of the mass block. PhioutThe heat transfer power can be understood as the heat transfer power, which is mainly divided into two parts of heat conduction and heat convection, and the heat conduction power is calculated according to the following principle:
wherein, λ is heat conductivity coefficient, A is heat conduction area, d is mass center distance of two mass blocks, and T1、T2For the existence of two heat-conductingThe temperature of the mass.
The heat convection power calculation principle is as follows:
Φ＝k×A×(Tm-Tw)
wherein h is the convective heat transfer coefficient, A is the convective heat transfer area, and TmIs the temperature of the lubricating oil, TwIs the mass temperature.
According to the method for measuring the temperature of the clutch, provided by the embodiment of the invention, the clutch state parameter input by a user is received; inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to the state parameters of the clutch under different working conditions. The problem that the friction plate ablation can be found and solved only by a bench test or a whole vehicle test method in the prior art is solved, the temperature of the friction plate is calculated by a simulation method, and the risk of thermal failure of the clutch is identified and avoided.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a device for measuring a clutch temperature according to a third embodiment of the present invention, where this embodiment is applicable to a case where the temperature of the clutch under different operating conditions is measured by a simulation test method, and the method may be executed by the device for measuring a clutch temperature, and the device may be implemented by software and/or hardware.
As shown in fig. 3, the device for measuring the clutch temperature according to the embodiment of the present invention mainly includes:
a receiving module 310, configured to receive a clutch state parameter input by a user;
the input module 320 is used for inputting the clutch state parameters to a pre-established clutch thermal model to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch, and state parameters and structural parameters of the clutch under different working conditions.
According to the device for measuring the temperature of the clutch, provided by the embodiment of the invention, the clutch state parameters input by a user are received; inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to the state parameters of the clutch under different working conditions. The problem that the friction plate ablation can be found and solved only by a bench test or a whole vehicle test method in the prior art is solved, the temperature of the friction plate is calculated by a simulation method, and the risk of thermal failure of the clutch is identified and avoided.
Furthermore, the clutch thermal model is obtained by integrating a clutch heat production sub-model and a clutch heat transfer sub-model.
Further, the input module 320 includes:
the first input unit is used for inputting the clutch state parameters to a clutch heat generation sub-model to obtain clutch heat generation power; the clutch heat generation sub-model stores the relationship between the clutch state parameters and the heat generation power under various working conditions;
and the second input monocular is used for inputting the clutch state parameter and the clutch heat generation power to the clutch heat transfer submodel to obtain the temperature of each part of the clutch corresponding to the state parameter, wherein the clutch heat transfer submodel stores the corresponding relation among the clutch state parameter, the heat generation power and the temperature of each part under each working condition.
Specifically, the relationship between the state parameters when the clutch is in the combined state and the friction heat-generating power of the clutch is defined by the relationship between the combination pressure, the combination rotational speed difference, the lubricating oil temperature and the friction factor when the clutch is in the combined state; a relationship between friction factor and friction torque; and friction torque, in combination with the relationship between the rotational speed difference and the frictional heat generating power.
Specifically, the relationship between the friction factor and the friction torque is:
wherein T is friction torque, R is outer diameter of the friction plate, R is inner diameter of the friction plate, mu is friction factor, p is combination pressure, A is effective area of the actuating piston, and N is friction surface number.
Specifically, the relationship between the heat generation power and the temperature of each component, the relationship between the heat generation power and the lubricating oil parameters on each component, and the relationship between the lubricating oil parameters on each component and the temperature of each component are stored in the clutch heat transfer submodel.
The device for measuring the temperature of the clutch provided by the embodiment of the invention can execute the method for measuring the temperature of the clutch provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 4 is a schematic structural diagram of an apparatus according to a fourth embodiment of the present invention, as shown in fig. 4, the apparatus includes a processor 410, a memory 420, an input device 430, and an output device 440; the number of the processors 410 in the device may be one or more, and one processor 410 is taken as an example in fig. 4; the processor 410, the memory 420, the input device 430 and the output device 440 in the apparatus may be connected by a bus or other means, for example, in fig. 4.
The memory 420 serves as a computer-readable storage medium for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the method for measuring the clutch temperature according to the embodiment of the present invention (for example, the receiving module 310 and the input module 320 in the device for measuring the clutch temperature). The processor 410 executes various functional applications of the device and data processing, i.e., the above-described method for measuring the clutch temperature, by executing software programs, instructions and modules stored in the memory 420.
The memory 420 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 420 may further include memory located remotely from processor 410, which may be connected to devices through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input means 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the apparatus. The output device 440 may include a display device such as a display screen.
EXAMPLE five
An embodiment of the present invention further provides a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a method for measuring a clutch temperature, the method including:
receiving a clutch state parameter input by a user;
inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions.
Of course, the embodiment of the present invention provides a storage medium containing computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and can also perform related operations in the method for measuring the clutch temperature provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the device for measuring the clutch temperature, the units and modules included in the device are merely divided according to the functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A method of measuring clutch temperature, the method comprising:
receiving a clutch state parameter input by a user;
inputting the state parameters of the clutch to a pre-established thermal model of the clutch to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions.
2. The method of claim 1, wherein the clutch thermal model is integrated from a clutch heat generation sub-model and a clutch heat transfer sub-model.
3. The method of claim 2, wherein inputting the clutch state parameters into a pre-established thermal model of the clutch to obtain the temperatures of the clutch components to which the state parameters correspond comprises:
inputting the clutch state parameters to a clutch heat production sub-model to obtain clutch heat production power; the clutch heat generation sub-model stores the relationship between the clutch state parameters and the heat generation power under various working conditions;
and inputting the state parameter and the heat generation power of the clutch to the clutch heat transfer submodel to obtain the temperature of each part of the clutch corresponding to the state parameter, wherein the clutch heat transfer submodel stores the corresponding relation between the state parameter of the clutch, the heat generation power and the temperature of each part under each working condition.
4. The method of claim 2, wherein the relationship between the state parameter of the clutch and the frictional heat generating power of the clutch is determined from the relationship between the clutch engagement pressure, the engagement rotational speed difference, the temperature of the lubricating oil and the friction factor, the relationship between the friction factor and the friction torque, and the relationship between the friction torque, the engagement rotational speed difference and the frictional heat generating power.
5. The method of claim 4, wherein the relationship between friction factor and friction torque is:
wherein T is friction torque, R is outer diameter of the friction plate, R is inner diameter of the friction plate, mu is friction factor, p is combination pressure, A is effective area of the actuating piston, and N is friction surface number.
6. The method of claim 2, wherein the clutch heat transfer submodel stores clutch state parameters and heat generation power versus component temperature as determined by clutch state parameters versus component convective heat transfer coefficients, and clutch heat generation power versus component convective heat transfer coefficients versus component temperature.
7. A device for measuring clutch temperature, said device comprising:
the receiving module is used for receiving clutch state parameters input by a user;
the input module is used for inputting the clutch state parameters to a pre-established clutch thermal model to obtain the temperature of each part of the clutch corresponding to the state parameters; the thermal model of the clutch is established according to structural parameters of the clutch and state parameters of the clutch under different working conditions.
8. An apparatus, characterized in that the apparatus comprises:
one or more processors;
a memory for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the method, apparatus, device, and storage medium for clutch temperature measurement as claimed in any one of claims 1-6.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method, a device, an apparatus and a storage medium for measuring a clutch temperature according to any one of claims 1 to 6.
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