CN113946970A - Thermal equilibrium temperature prediction method, device and system of speed reducer and vehicle equipment - Google Patents
Thermal equilibrium temperature prediction method, device and system of speed reducer and vehicle equipment Download PDFInfo
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Abstract
The invention belongs to the technical field of vehicle equipment, solves the technical problem that the thermal balance temperature of the temperature rise process of a speed reducer detected in the prior art is low in reliability in the calculation of the thermal balance temperature of the actual temperature rise performance in a dynamic complex working condition state, and provides a method, a device and a system for predicting the thermal balance temperature of the speed reducer and vehicle equipment. Acquiring the motion parameters and system temperature of the speed reducer and the current environment temperature; obtaining a first heat energy value generated by the speed reducer at any time period according to the motion parameter; and obtaining the heat balance temperature of the speed reducer and the environment by utilizing a recursion mode according to each first heat energy value, the environment temperature and the system temperature in any time period. The invention can improve the reliability of the heat balance temperature of the speed reducer, better guide the design of various indexes of the speed reducer and improve the performance and the user experience effect of the speed reducer.
Description
Technical Field
The invention relates to the technical field of vehicle equipment, in particular to a thermal balance temperature prediction method, device and system of a speed reducer and vehicle equipment.
Background
With the continuous development of computer and automobile technology, fuel automobiles and new energy automobiles become necessities of life of people, a speed reducer is an important component of an automobile, and the speed reducer is also an important evaluation index for automobile use experience of people.
The temperature rise performance is an important performance index of the automobile speed reducer, wherein the temperature rise performance is the relationship between the temperature rise process of the speed reducer and the ambient temperature, finally the system temperature of the speed reducer and the ambient temperature reach a thermal balance state, the system temperature of the final thermal balance state of the temperature rise performance is recorded as the thermal balance temperature, the thermal balance temperature is an important parameter for the service life of important parts (such as gears, bearings and the like) and the maintenance of the speed reducer, and meanwhile, the thermal balance temperature of the temperature rise performance is also an important evaluation parameter for the design of the speed reducer on a gear shaft, a shell, a lubrication design, the arrangement of a finished automobile, the operation condition and the like, so that how to predict the thermal balance temperature reached by the speed reducer system under different working conditions in advance according to target parameters in the early stage of product development and related parameters is a key point for the design of the speed reducer.
In the prior art, a method for detecting the heat balance temperature of the temperature rise performance of the speed reducer is to perform simulation analysis by using a thermal network analysis method based on a thermoelectric simulation principle and combining a finite element method to obtain the heat balance temperature of the speed reducer.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, a system and a vehicle device for predicting a thermal equilibrium temperature of a speed reducer, so as to solve the technical problem that the reliability of the existing thermal equilibrium temperature calculation for detecting the thermal equilibrium temperature of a temperature rise process of the speed reducer is low when the actual temperature rise performance is used in a dynamic complex operating condition state.
The technical scheme adopted by the invention is as follows:
the invention provides a thermal equilibrium temperature prediction method of a speed reducer, which comprises the following steps:
s1: acquiring motion parameters and system temperature of a speed reducer and the ambient temperature of the current environment where the speed reducer is located;
s2: obtaining a first heat energy value generated by the speed reducer at any time period according to the motion parameter;
s3: and obtaining the heat balance temperature of the speed reducer and the environment by utilizing a recursion mode according to each first heat energy value, the environment temperature and the system temperature in any time period.
Preferably, the S2 includes:
s21: acquiring the interval duration of the current time period;
s22: according to the interval duration, using formula Qn＝(W1+W2+…Wm)*ΔtnObtaining a first heat energy value generated in an interval duration corresponding to the current time period;
wherein Q isnA first thermal energy value, W, corresponding to the energy generated by the retarder during the nth intervalmFor the power loss generated by the m-th mechanism of the speed reducer, the mechanism at least comprises one of the following components: bearing, gear, oil seal and oil stirring mechanism, delta tnThe time length corresponding to the nth interval time length is m and n are positive integers.
Preferably, the S3 includes:
s31: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
s32: using formula q based on said external surface area and said heat exchange coefficientn＝(Tn-1-TE)×S×H×ΔtnObtaining a second heat energy value corresponding to the heat exchange dissipation of the speed reducer and the environment at each interval time;
s33: obtaining the thermal equilibrium temperature according to the corresponding first thermal energy value and the second thermal energy value in each interval duration;
wherein, Tn-1System temperature, q, of the retarder for the duration of the n-1 th intervalnFor a second thermal energy value, T, corresponding to the heat exchange dissipation of the retarder with the environment during the nth intervalEIs the ambient temperature,. DELTA.tnThe time length corresponding to the time length of the nth interval, H is a heat exchange coefficient, and S is the external surface area of the speed reducer.
Preferably, the S33 includes:
s331: acquiring system heat capacity of the speed reducer;
s332: using the formula T based on the system heat capacityn＝Tn-1+(Qn-qn) Obtaining the system temperature corresponding to the speed reducer in each interval duration, wherein each interval duration is the same;
s333: obtaining a thermal equilibrium temperature by comparing the variation relationship of the system temperature for each interval duration;
wherein C is the system heat capacity, Tn-1System temperature, T, of the retarder for the duration of the n-1 th intervalnSystem temperature, q, of the retarder for the duration of the nth intervalnFor a second heat energy value, Q, of the retarder corresponding to the heat exchange dissipation of the environment during the nth intervalnAnd dissipating the corresponding first heat energy value for the energy generated by the speed reducer in the nth interval duration.
Preferably, after S333, the method further includes:
s334: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
s335: obtaining a mapping relation T 'of the heat balance temperature, the environment temperature, the motion parameter, the heat exchange coefficient and the external surface area according to the system temperature corresponding to the multiple heat balances'n＝TE+(W1+W2+…Wm)/(S*H)；
Wherein, T'nFor a predicted system temperature, T, corresponding to the thermal equilibrium over n intervalsEIs the current ambient temperature, H is the heat exchange coefficient, S is the external surface area of the reducer, WmFor the power loss generated by the mth mechanism of the speed reducer, m and n are integers, and the mechanism at least comprises one of the following components: bearing, gear, oil blanket and oil mixing mechanism.
Preferably, the motion parameters include at least one of: power loss of bearing rotation, power loss of gear engagement, power loss of oil seal friction and power loss of oil mixing.
The present invention also provides a thermal equilibrium temperature prediction apparatus of a decelerator, the apparatus including:
a parameter acquisition module: the method comprises the steps of obtaining motion parameters and system temperature of a speed reducer and the ambient temperature of the current environment where the speed reducer is located;
the data conversion module: the user obtains a first heat energy value generated by the speed reducer at any time period according to the motion parameter;
a data processing module: and the heat balance temperature of the speed reducer and the environment is obtained by utilizing a recursion mode according to each first heat energy value, the environment temperature and the system temperature in any time period.
The present invention also provides a thermal equilibrium temperature prediction system for a decelerator, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of the above.
The invention also provides vehicle equipment comprising the thermal equilibrium temperature prediction system of the speed reducer.
The invention also provides a medium having stored thereon computer program instructions which, when executed by a processor, implement the method of any of the above.
In conclusion, the beneficial effects of the invention are as follows:
according to the thermal equilibrium temperature prediction method, device and system for the speed reducer and the vehicle equipment, the motion parameters of the existing speed reducer, the system temperature and the current environment temperature are obtained, the first thermal energy value generated in each time period when the speed reducer runs is calculated, the thermal equilibrium temperature between the speed reducer and the environment is obtained by combining the system temperature and the environment temperature through the first thermal energy value in a recursion mode, the reliability of the thermal equilibrium temperature of the speed reducer can be improved through the method, the design of each index of the speed reducer is guided better, and the performance and the user experience effect of the speed reducer are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without any creative effort, other drawings may be obtained according to the drawings, and these drawings are all within the protection scope of the present invention.
FIG. 1 is a schematic flowchart of a method for predicting the heat equilibrium temperature of a decelerator in accordance with embodiment 1;
FIG. 2 is a schematic view of a process for obtaining a first heat energy value in example 1;
FIG. 3 is a schematic view of the procedure for obtaining the heat equilibrium temperature in example 1;
FIG. 4 is a schematic view showing a process of determining a heat balance temperature according to a temperature change relationship at each interval duration in example 1;
FIG. 4-1 is a temperature rise curve diagram of the system temperature of the decelerator in embodiment 1;
FIG. 5 is a schematic configuration diagram of a thermal equilibrium temperature predicting apparatus of a decelerator in accordance with embodiment 2;
fig. 6 is a schematic configuration diagram of a thermal equilibrium temperature prediction system of a decelerator in embodiment 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In case of conflict, the various features of the present invention and embodiments may be combined with each other and are within the scope of the present invention.
Example 1
The speed reducer is a power transmission mechanism that obtains a large torque by reducing the number of revolutions of a motor to a desired number of revolutions using a speed converter of a gear. The reducer mainly has the following functions: the speed reduction can improve the output torque at the same time, and the torque output proportion is multiplied by the reduction ratio according to the output of the motor, but the rated torque of the speed reducer can not be exceeded. The deceleration reduces the inertia of the load at the same time, the reduction in inertia being the square of the reduction ratio. The speed reducer can change the transmission direction of power by 90 degrees (when the engine is vertically arranged), reduce the rotating speed and increase the torque so as to ensure that the automobile has enough traction force and proper speed on a good road surface.
The reducer exchanges heat with the external environment continuously in the working process, finally people who exchange heat energy generated by the reducer with the external environment can reach a heat balance state, the system temperature of the reducer does not rise continuously, the system temperature of the reducer corresponding to the heat balance state is recorded as the heat balance temperature, if the heat balance temperature is too high, the working performance of each component of the reducer can be influenced, and if the reducer goes wrong in a high-speed driving state of an automobile, very serious consequences can be caused, so that how to determine the relation between the heat balance temperature and each functional component of the reducer is an important reference index for designing the reducer.
Referring to fig. 1, fig. 1 is a method for predicting a thermal equilibrium temperature of a retarder according to embodiment 1 of the present invention, which is mainly applied to a vehicle device, especially a new energy automobile device, and the method includes:
s1: acquiring motion parameters and system temperature of a speed reducer and the ambient temperature of the current environment where the speed reducer is located;
specifically, gather the motion parameter of reduction gear, wherein, the motion parameter is the power loss of each functional unit of reduction gear, including not being limited to bearing rotation, gear engagement, oil blanket friction and oil mixing etc. and corresponding power loss, gather the present ambient temperature of outside simultaneously, wherein, the initial temperature of reduction gear is initial ambient temperature, and system temperature can constantly rise because the inside heat energy that produces of reduction gear, and the heat energy that finally the inside heat energy that produces of reduction gear and the heat energy of environmental heat exchange dissipation reach the balance for the temperature of reduction gear no longer continues to rise.
S2: obtaining a first heat energy value generated by the speed reducer at any time period according to the motion parameter;
specifically, a first thermal energy value generated by the speed reducer in any time period is obtained according to the power loss of each functional component of the speed reducer, the first thermal energy value enables the system temperature of the speed reducer to rise, part of the generated first thermal energy value is dissipated through ambient heat exchange along with the continuous rise of the temperature of the speed reducer, and when the system temperature of the speed reducer cannot rise continuously, the thermal energy dissipated through the ambient heat exchange approaches the first thermal energy value, and at the moment, thermal balance is achieved.
In one embodiment, referring to fig. 2, the S2 includes:
s21: acquiring the interval duration of the current time period;
s22: according to the interval duration, using formula Qn＝(W1+W2+…Wm)*ΔtnObtaining a first heat energy value generated in an interval duration corresponding to the current time period;
wherein Q isnA first thermal energy value, W, corresponding to the energy generated by the retarder during the nth intervalmFor the power loss generated by the m-th mechanism of the speed reducer, the mechanism at least comprises one of the following components: bearing, gear, oil seal and oil stirring mechanism, delta tnThe time length corresponding to the nth interval time length is m and n are positive integers.
Specifically, a plurality of time periods are set, each time periodThe interval duration of (A) may be equal or unequal, using formula Qn＝(W1+W2+…Wm)*ΔtnThe first thermal energy value corresponding to the energy generated by the speed reducer in any time period in the time period can be obtained, so that the current system temperature can be obtained by combining the ambient temperature in a recursion mode.
S3: and obtaining the heat balance temperature of the speed reducer and the environment by utilizing a recursion mode according to each first heat energy value, the environment temperature and the system temperature in any time period.
Specifically, the system temperature is a temperature that constantly changes with the operating state of the speed reducer, that is, if the speed reducer never starts to operate to a normal operating state, the system temperature has an initial ambient temperature that constantly rises to a temperature of a thermal equilibrium state; gradually obtaining the system temperature in each time period by combining the first heat value generated by the speed reducer in each time period with the ambient temperature; the thermal equilibrium temperature of the speed reducer is determined according to the system temperatures, and further, the judging mode of the thermal equilibrium temperature includes but is not limited to: and directly comparing the temperatures of the systems, determining the heat balance temperature according to the change rate or the difference value of the temperatures of the systems, and/or determining the heat balance temperature according to the change rate or the difference value of the first heat energy value generated by the speed reducer and the second heat energy value dissipated by the heat dissipation system through the heat dissipation system.
In one embodiment, referring to fig. 3, the S3 includes:
s31: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
in particular, the heat exchange capacity of the reducer with the external environment is mainly affected by the heat exchange coefficient and the external surface area.
S32: using formula q based on said external surface area and said heat exchange coefficientn＝(Tn-1-TE)×S×H×ΔtnObtaining a second heat energy value corresponding to the heat exchange dissipation of the speed reducer and the environment at each interval time;
specifically, the system temperature and the ambient temperature of the previous time period are calculated by the formula qn＝(Tn-1-TE)×S×H×ΔtnFind each timeThe heat energy of the heat exchange between the speed reducer in the interval and the external environment is a second heat energy value, such as: let the interval duration Δ tnIs constant for a time period t, t in an initial state0Time system temperature T0Equal to the ambient temperature TEAt this stage, there is no heat exchange energy dissipation q 00; at t1Time of day, heat exchange energy q1＝(T0-TE) X S X H x t at t2Time, q2＝(T1-TE) X S X H x t, and so on, at tnTime, qn＝(Tn-1-TE)×S×H×t。
S33: obtaining the thermal equilibrium temperature according to the corresponding first thermal energy value and the second thermal energy value in each interval duration;
wherein, Tn-1System temperature, q, of the retarder for the duration of the n-1 th intervalnFor a second thermal energy value, T, corresponding to the heat exchange dissipation of the retarder with the environment during the nth intervalEIs the ambient temperature,. DELTA.tnThe time length corresponding to the time length of the nth interval, H is a heat exchange coefficient, and S is the external surface area of the speed reducer.
Specifically, the second thermal energy value obtained each time is compared with the first thermal energy value, and when the difference between the second thermal energy value and the first thermal energy value is within a preset threshold value, it indicates that the system temperature and the ambient temperature at that time reach a thermal equilibrium state, so as to obtain a thermal equilibrium temperature.
In one embodiment, referring to fig. 4, the S33 includes:
s331: acquiring system heat capacity of the speed reducer;
s332: using the formula T based on the system heat capacityn＝Tn-1+(Qn-qn) Obtaining the system temperature corresponding to the speed reducer in each interval duration, wherein each interval duration is the same;
s333: obtaining a thermal equilibrium temperature by comparing the variation relationship of the system temperature for each interval duration;
wherein C is the system heat capacity, Tn-1System temperature, T, of the retarder for the duration of the n-1 th intervalnIs as followsSystem temperature of the retarder, q, corresponding to n interval durationsnFor a second heat energy value, Q, of the retarder corresponding to the heat exchange dissipation of the environment during the nth intervalnAnd dissipating the corresponding first heat energy value for the energy generated by the speed reducer in the nth interval duration.
Specifically, the system temperature of the retarder in each time period is obtained by using a formula, the rising rate of the system temperature is lower and lower until the system temperature tends to be stable as time goes on, as shown in fig. 4-1, a rising curve of the retarder system is obtained, and the thermal equilibrium temperature is determined by comparing the system temperatures, wherein the system temperature is not limited to be set to be lower or higher in adjacent time periods by less than a threshold difference temperature, or the difference value of the second heat energy in adjacent time periods is less than a heat energy difference threshold, or the difference value of the first heat energy and the second heat energy is less than a heat energy threshold (specifically, before the retarder starts to work, the system temperature is equal to the ambient temperature, and at this time q is equal to the ambient temperaturenIs zero, when the temperature of the system is continuously increased, the first heat energy Q is generatednSecond heat energy q for heat exchangenIncreasing continuously, and second heat energy q when heat balance is reachednApproaches the first heat energy Qn)。
In one embodiment, the S333 includes:
s3331: acquiring a temperature change rate threshold of the speed reducer;
s3332: comparing the ratio of the current system temperature of the speed reducer to the previous system temperature with a temperature change rate threshold, and if the ratio meets the requirement, outputting the current system temperature as a target system temperature;
specifically, a temperature-time curve is established for the system temperature at each time point after the speed reducer starts to operate, the real-time change rate of the system temperature is obtained through the temperature-time curve, a temperature change rate threshold value of adjacent change rates is set, and when the temperature change rate is smaller than the temperature change rate threshold value, the current system temperature is output as the thermal equilibrium temperature.
In an embodiment, after the S333, the method further includes:
s334: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
s335: obtaining a mapping relation T 'of the heat balance temperature, the environment temperature, the motion parameter, the heat exchange coefficient and the external surface area according to the system temperature corresponding to the multiple heat balances'n＝TE+(W1+W2+…Wm)/(S*H)；
Wherein, T'nFor a predicted system temperature, T, corresponding to the thermal equilibrium over n intervalsEIs the current ambient temperature, H is the heat exchange coefficient, S is the external surface area of the reducer, WmFor the power loss generated by the mth mechanism of the speed reducer, m and n are integers, and the mechanism at least comprises one of the following components: bearing, gear, oil blanket and oil mixing mechanism.
Specifically, multiple tests are carried out on different speed reducers to obtain the system temperatures and the final heat balance temperature corresponding to the tests, and a mapping relation between the heat balance temperature and the speed reducer parameter and the environment temperature is found, wherein the mapping relation is T'n＝TE+(W1+W2+…Wm) V (S × H); wherein, T'nFor a predicted system temperature, T, corresponding to the thermal equilibrium over n intervalsEIs the current ambient temperature, H is the heat exchange coefficient, S is the external surface area of the reducer, WmThe power loss generated by the mth mechanism of the speed reducer is m, and m is an integer; various parameters of the speed reducer can be designed according to needs through the mapping relation, so that the performance of the speed reducer is improved, and the user experience effect is improved.
In one embodiment, the motion parameters include at least one of: bearing rotation, gear engagement, oil seal friction and power loss corresponding to oil mixing.
By adopting the thermal balance temperature prediction method of the speed reducer of the embodiment, the first thermal energy value generated in each time period when the speed reducer is in operation is calculated by acquiring the motion parameters of the existing speed reducer, the system temperature and the current environment temperature, and the thermal balance temperature between the speed reducer and the environment is obtained by combining the system temperature and the environment temperature by using the first thermal energy value in an iteration mode.
Example 2
Embodiment 2 of the present invention also provides a device for predicting a thermal equilibrium temperature of a speed reducer based on the method of embodiment 1, and referring to fig. 5, the device includes:
a parameter acquisition module: the method comprises the steps of obtaining motion parameters and system temperature of a speed reducer and the ambient temperature of the current environment where the speed reducer is located;
the data conversion module: the user obtains a first heat energy value generated by the speed reducer at any time period according to the motion parameter;
a data processing module: and the heat balance temperature of the speed reducer and the environment is obtained by utilizing a recursion mode according to each first heat energy value, the environment temperature and the system temperature in any time period.
By adopting the thermal equilibrium temperature prediction device of the speed reducer of the embodiment, the first thermal energy value generated in each time period when the speed reducer is in operation is calculated by acquiring the motion parameters of the existing speed reducer, the system temperature and the current environment temperature, and the thermal equilibrium temperature between the speed reducer and the environment is obtained by combining the system temperature and the environment temperature by using the first thermal energy value in an iteration mode.
In one embodiment, the data conversion module includes:
a time information acquisition unit: acquiring the interval duration of the current time period;
a first thermal energy value unit: according to the interval duration, using formula Qn＝(W1+W2+…Wm)*ΔtnObtaining a first heat energy value generated in an interval duration corresponding to the current time period;
wherein Q isnA first thermal energy value, W, corresponding to the energy dissipation generated by the retarder during the nth intervalmFor the power loss, Δ t, produced by the m-th mechanism of the reducernIs the time length corresponding to the time length of the nth interval.
In one embodiment, the data processing module comprises:
a reducer parameter unit: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
a second thermal energy value unit: using formula q based on said external surface area and said heat exchange coefficientn＝(Tn-1-TE)×S×H×ΔtnObtaining a second heat energy value corresponding to the heat exchange dissipation of the speed reducer and the environment at each interval time;
a thermal balance mapping unit: obtaining the thermal equilibrium temperature according to the corresponding first thermal energy value and the second thermal energy value in each interval duration;
wherein, Tn-1System temperature, q, of the retarder for the duration of the n-1 th intervalnFor a second thermal energy value, T, corresponding to the heat exchange dissipation of the retarder with the environment during the nth intervalEIs the ambient temperature,. DELTA.tnThe time length corresponding to the time length of the nth interval, H is a heat exchange coefficient, and S is the external surface area of the speed reducer.
In one embodiment, the heat balancing unit includes:
a heat capacity unit: acquiring system heat capacity of the speed reducer;
a system temperature unit: using the formula T based on the system heat capacityn＝Tn-1+(Qn-qn) Obtaining the system temperature corresponding to the speed reducer in each interval duration, wherein each interval duration is the same;
a heat balance unit: obtaining a thermal equilibrium temperature by comparing the variation relationship of the system temperature for each interval duration;
wherein C is the system heat capacity, Tn-1System temperature, T, of the retarder for the duration of the n-1 th intervalnSystem temperature, q, of the retarder for the duration of the nth intervalnFor a second heat energy value, Q, of the retarder corresponding to the heat exchange dissipation of the environment during the nth intervalnAnd dissipating the corresponding first heat energy value for the energy generated by the speed reducer in the nth interval duration.
In one embodiment, the heat balancing unit includes:
a first parameter unit: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
the first calculation unit: obtaining a mapping relation T 'of the heat balance temperature, the environment temperature, the motion parameter, the heat exchange coefficient and the external surface area according to the system temperature corresponding to the multiple heat balances'n＝TE+(W1+W2+…Wm)/(S*H)；
Wherein, T'nFor a predicted system temperature, T, corresponding to the thermal equilibrium over n intervalsEIs the current ambient temperature, H is the heat exchange coefficient, S is the external surface area of the reducer, WmFor the power loss generated by the mth mechanism of the speed reducer, m and n are integers, and the mechanism at least comprises one of the following components: bearing, gear, oil blanket and oil mixing mechanism.
In one embodiment, the motion parameters include at least one of: power loss of bearing rotation, power loss of gear engagement, power loss of oil seal friction and power loss of oil mixing.
By adopting the thermal equilibrium temperature prediction device of the speed reducer of the embodiment, the first thermal energy value generated in each time period when the speed reducer is in operation is calculated by acquiring the motion parameters of the existing speed reducer, the system temperature and the current environment temperature, and the thermal equilibrium temperature between the speed reducer and the environment is obtained by combining the system temperature and the environment temperature by using the first thermal energy value in an iteration mode.
Example 3
The present invention provides a vending machine apparatus and storage medium, as shown in FIG. 6, comprising at least one processor, at least one memory, and computer program instructions stored in the memory.
In particular, the processor may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits that may be configured to implement embodiments of the present invention.
The memory may include mass storage for data or instructions. By way of example, and not limitation, memory may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or Universal Serial Bus (USB) Drive or a combination of two or more of these. The memory may include removable or non-removable (or fixed) media, where appropriate. The memory may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory is non-volatile solid-state memory. In a particular embodiment, the memory includes Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or a combination of two or more of these.
The processor reads and executes the computer program instructions stored in the memory to realize the thermal equilibrium temperature prediction method of the retarder in any one of the above embodiment modes.
In one example, the electronic device may also include a communication interface and a bus. The processor, the memory and the communication interface are connected through a bus and complete mutual communication.
The communication interface is mainly used for realizing communication among modules, devices, units and/or equipment in the embodiment of the invention.
A bus comprises hardware, software, or both that couple components of an electronic device to one another. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. A bus may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
In summary, embodiments of the present invention provide a method, an apparatus, a system, and a device for predicting a thermal equilibrium temperature of a speed reducer.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of predicting a thermal equilibrium temperature of a retarder, the method comprising:
s1: acquiring motion parameters and system temperature of a speed reducer and the ambient temperature of the current environment where the speed reducer is located;
s2: obtaining a first heat energy value generated by the speed reducer at any time period according to the motion parameter;
s3: and obtaining the heat balance temperature of the speed reducer and the environment by utilizing a recursion mode according to each first heat energy value, the environment temperature and the system temperature in any time period.
2. The thermal equilibrium temperature prediction method of a decelerator according to claim 1, wherein the S2 includes:
s21: acquiring the interval duration of the current time period;
s22: according to the interval duration, using formula Qn＝(W1+W2+…Wm)*ΔtnObtaining a first heat energy value generated in an interval duration corresponding to the current time period;
wherein Q isnA first thermal energy value, W, corresponding to the energy generated by the retarder during the nth intervalmFor the power loss generated by the m-th mechanism of the speed reducer, the mechanism at least comprises one of the following components: bearing, gear, oil seal and oil stirring mechanism, delta tnThe time length corresponding to the nth interval time length is m and n are positive integers.
3. The thermal equilibrium temperature prediction method of a decelerator according to claim 1, wherein the S3 includes:
s31: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
s32: using formula q based on said external surface area and said heat exchange coefficientn＝(Tn-1-TE)×S×H×ΔtnObtaining a second heat energy value corresponding to the heat exchange dissipation of the speed reducer and the environment at each interval time;
s33: obtaining the thermal equilibrium temperature according to the corresponding first thermal energy value and the second thermal energy value in each interval duration;
wherein, Tn-1System temperature, q, of the retarder for the duration of the n-1 th intervalnFor a second thermal energy value, T, corresponding to the heat exchange dissipation of the retarder with the environment during the nth intervalEIs the ambient temperature,. DELTA.tnThe time length corresponding to the time length of the nth interval, H is a heat exchange coefficient, and S is the external surface area of the speed reducer.
4. The thermal equilibrium temperature prediction method of a decelerator according to claim 3, wherein the S33 includes:
s331: acquiring system heat capacity of the speed reducer;
s332: using the formula T based on the system heat capacityn＝Tn-1+(Qn-qn) Obtaining the system temperature corresponding to the speed reducer in each interval duration, wherein each interval duration is the same;
s333: obtaining a thermal equilibrium temperature by comparing the variation relationship of the system temperature for each interval duration;
wherein C is the system heat capacity, Tn-1System temperature, T, of the retarder for the duration of the n-1 th intervalnSystem temperature, q, of the retarder for the duration of the nth intervalnFor a second heat energy value, Q, of the retarder corresponding to the heat exchange dissipation of the environment during the nth intervalnAnd dissipating the corresponding first heat energy value for the energy generated by the speed reducer in the nth interval duration.
5. The method for predicting the thermal equilibrium temperature of a decelerator according to claim 4, wherein the S33 further includes, after the S333:
s334: acquiring the heat exchange coefficient of the speed reducer and the outer surface area of the speed reducer;
s335: obtaining a mapping relation T 'of the heat balance temperature, the environment temperature, the motion parameter, the heat exchange coefficient and the external surface area according to the system temperature corresponding to the multiple heat balances'n＝TE+(W1+W2+…Wm)/(S*H)；
Wherein, T'nFor a predicted system temperature, T, corresponding to the thermal equilibrium over n intervalsEIs the current ambient temperature, H is the heat exchange coefficient, S is the external surface area of the reducer, WmFor the power loss generated by the mth mechanism of the speed reducer, m and n are integers, and the mechanism at least comprises one of the following components: bearing, gear, oil blanket and oil mixing mechanism.
6. Method for predicting the thermal equilibrium temperature of a decelerator according to any one of claims 1 to 5, characterized in that the kinetic parameters include at least one of the following: power loss of bearing rotation, power loss of gear engagement, power loss of oil seal friction and power loss of oil mixing.
7. A thermal equilibrium temperature prediction apparatus for a decelerator, the apparatus comprising:
a parameter acquisition module: the method comprises the steps of obtaining motion parameters and system temperature of a speed reducer and the ambient temperature of the current environment where the speed reducer is located;
the data conversion module: the user obtains a first heat energy value generated by the speed reducer at any time period according to the motion parameter;
a data processing module: and the heat balance temperature of the speed reducer and the environment is obtained by utilizing a recursion mode according to each first heat energy value, the environment temperature and the system temperature in any time period.
8. A thermal equilibrium temperature prediction system for a retarder, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of claims 1-7.
9. A vehicular apparatus characterized by comprising the thermal equilibrium temperature prediction system of a decelerator of claim 8.
10. A medium having stored thereon computer program instructions, which, when executed by a processor, implement the method of any one of claims 1-7.
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