Speed reducer temperature rise performance calculation method, device and equipment based on heat balance

Abstract

The invention belongs to the technical field of vehicle equipment, solves the problem of low reliability of temperature rise performance analysis of an actual temperature rise process in a dynamic complex working condition state in the prior art, and provides a speed reducer temperature rise performance calculation method, device and equipment based on heat balance. The method comprises the steps of obtaining motion parameters and environment temperature of a speed reducer; obtaining a first heat energy value generated by the speed reducer in any time period according to the motion parameters; the system temperature of the reducer in the first time period is obtained according to the first heat energy value in the first time period and the environment temperature. The target system temperature when the speed reducer and the environment reach the heat balance state is obtained by combining the first heat energy value with the system temperature and the environment temperature in a recursive mode, and the process that the temperature rise performance of the speed reducer corresponds to the system temperature recursive change of the first time period to obtain the target system temperature is obtained; through the method, the reliability of the heat balance temperature of the speed reducer can be improved, design of various indexes of the speed reducer is better guided, and the performance of the speed reducer is improved.

Description

[0001] This application is a divisional application of the invention patent application filed on October 23, 2021, with the invention name “Method, device, system and vehicle equipment for thermal balance temperature prediction of reducer” and application number 202111236564.1. Technical Field

[0002] The present invention relates to the technical field of vehicle equipment, and in particular to a method, device and equipment for calculating the temperature rise performance of a reducer based on thermal balance. Background Art

[0003] With the continuous development of computer and automobile technology, fuel vehicles and new energy vehicles have become necessities of people's lives. Reducers are an important component of automobiles and are also an important evaluation indicator of people's car experience.

[0004] Temperature rise performance is an important performance indicator of automobile reducers, among which, temperature rise performance is the relationship between the temperature rise process of the reducer and the ambient temperature, which eventually makes the system temperature of the reducer reach a thermal equilibrium state with the ambient temperature, and the system temperature of the final thermal equilibrium state of the temperature rise performance is recorded as the thermal equilibrium temperature. The thermal equilibrium temperature is an important parameter for the service life of important components (gears, bearings and other parts) and reducer maintenance. At the same time, the thermal equilibrium temperature of temperature rise performance is also an important evaluation parameter for the reducer in the design of gear shafts, housings, lubrication, vehicle layout, operating conditions, etc. Therefore, how to calculate the temperature rise performance of the reduction system under different working conditions based on the target parameters and related parameters in the early stage of product development to achieve the thermal equilibrium temperature is the key point of reducer design.

[0005] In the prior art, the detection and calculation method for the temperature rise performance of the reducer is to use a thermal network analysis method based on the thermoelectric analogy principle and combine it with the finite element method to perform simulation analysis to obtain the thermal equilibrium temperature of the reducer. This method is only applicable to static thermal equilibrium temperature, and has the problem of low reliability in the temperature rise performance analysis of the actual heating process under dynamic and complex working conditions. Summary of the invention

[0006] In view of this, an embodiment of the present invention provides a method, device and equipment for calculating the temperature rise performance of a reducer based on thermal balance, so as to solve the technical problem that the existing thermal balance temperature for detecting the temperature rise history of the reducer has low reliability in calculating the actual temperature rise performance under dynamic and complex working conditions.

[0007] The technical solution adopted by the present invention is:

[0008] The present invention provides a method for calculating the temperature rise performance of a reducer based on thermal balance, the method comprising:

[0009] Acquire the motion parameters of the reducer and the ambient temperature of the current environment where the reducer is located; wherein the motion parameters are the power loss of each functional component of the reducer;

[0010] According to the power loss, a first heat energy value generated by the reducer in any period of time is obtained;

[0011] Obtaining a system temperature of the reducer in the first period of time according to the first heat energy value in the first period of time and the ambient temperature;

[0012] According to the first thermal energy values, the ambient temperature and the system temperature in any time period, a recursive method is used to calculate until a target system temperature is obtained in which the reducer and the environment reach a thermal equilibrium state; wherein the temperature rise performance of the reducer corresponds to the recursive change of the system temperature in the first time period to obtain the target system temperature.

[0013] Preferably, obtaining the first heat energy value generated by the reducer in any period of time according to the power loss includes:

[0014] Get the interval duration of the current period;

[0015] According to the interval length, using the formula Q n =(W1+W2+…W m )*Δt n Obtaining a first heat energy value generated within an interval duration corresponding to the current time period;

[0016] Among them, Q n is the first thermal energy value corresponding to the energy generated by the reducer in the nth interval, W m is the power loss generated by the mth type of reducer mechanism, which includes at least one of the following: bearings, gears, oil seals and oil stirring mechanisms, Δt n is the duration corresponding to the nth interval duration, where m and n are positive integers.

[0017] Preferably, obtaining the system temperature of the reducer in the first period of time according to the first thermal energy value in the first period of time and the ambient temperature includes:

[0018] Get the system heat capacity of the reducer;

[0019] According to the first thermal energy value of the first period, the ambient temperature and the system heat capacity, the formula T1=T E +Q1 / C gets the system temperature in the first period;

[0020] Wherein, C is the system heat capacity, T1 is the system temperature of the reducer corresponding to the first interval duration, and Q1 is the first thermal energy value corresponding to the energy dissipation generated by the reducer in the first interval duration.

[0021] Preferably, the calculation is performed recursively according to each of the first heat energy values, the ambient temperature and the system temperature in any time period until a target system temperature at which the reducer and the environment reach a thermal equilibrium state is obtained, including:

[0022] Obtain the heat exchange coefficient of the reducer and the outer surface area of ​​the reducer;

[0023] According to the outer surface area and the heat exchange coefficient, using the formula q n =(T n-1 -T E )×S×H×Δt n Obtaining a second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment at each interval time;

[0024] Obtaining the thermal equilibrium temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval time length;

[0025] Among them, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, T E is the ambient temperature, Δt n is the duration corresponding to the nth interval, H is the heat exchange coefficient, and S is the outer surface area of ​​the reducer.

[0026] Preferably, obtaining the target system temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval duration includes:

[0027] Get the system heat capacity of the reducer;

[0028] According to the system heat capacity, using the formula T n =T n-1 +(Q n -q n ) / C to obtain the system temperature corresponding to the reducer in each interval time, wherein each interval time is the same;

[0029] By comparing the change relationship of the system temperature at each time interval, the thermal equilibrium temperature is obtained;

[0030] Where C is the system heat capacity, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, T n is the system temperature of the reducer corresponding to the nth interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, Q n It is the first thermal energy value corresponding to the energy dissipation generated by the reducer in the nth interval duration.

[0031] Preferably, obtaining the target system temperature by comparing the change relationship of the system temperature at each interval time includes:

[0032] Get the temperature change rate threshold of the reducer;

[0033] The ratio of the current system temperature of the reducer to the previous system temperature is compared with the temperature change rate threshold. If it meets the requirements, the current system temperature is output as the target system temperature.

[0034] Preferably, obtaining the target system temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval duration includes:

[0035] Get the thermal energy difference threshold of the reducer;

[0036] 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 the thermal energy difference threshold, the current system temperature is output as the target system temperature.

[0037] The present invention also provides a device for calculating the temperature rise performance of a reducer based on thermal balance, the device comprising:

[0038] Parameter acquisition module: used to obtain the motion parameters of the reducer and the ambient temperature of the current environment where the reducer is located; wherein the motion parameters are the power loss of each functional component of the reducer;

[0039] Data conversion module: used for obtaining the first heat energy value generated by the reducer in any period of time according to the power loss;

[0040] A temperature calculation module, used for obtaining a system temperature of the reducer in the first period according to the first heat energy value in the first period and the ambient temperature;

[0041] Data processing module: used to calculate by recursive method according to the first thermal energy values, the ambient temperature and the system temperature in any time period until the target system temperature at which the reducer and the environment reach a thermal equilibrium state is obtained; wherein, the temperature rise performance of the reducer corresponds to the recursive change of the system temperature in the first time period to obtain the target system temperature.

[0042] The present invention also provides a reducer temperature rise performance calculation system based on thermal balance, comprising: at least one processor, at least one memory and computer program instructions stored in the memory, and when the computer program instructions are executed by the processor, any of the methods described above is implemented.

[0043] The present invention also provides a vehicle device, comprising the above-mentioned heat balance-based reducer temperature rise performance calculation system.

[0044] The present invention also provides a medium on which computer program instructions are stored, and when the computer program instructions are executed by a processor, any one of the above methods is implemented.

[0045] In summary, the beneficial effects of the present invention are as follows:

[0046] The present invention provides a method, device and equipment for calculating the temperature rise performance of a reducer based on thermal balance. The method obtains the motion parameters of the existing reducer and the current ambient temperature, calculates the first thermal energy value generated in each time period when the reducer is in operation, and calculates the system temperature of the first time period of the reducer based on the first thermal energy value and the ambient temperature of the first time period. The first thermal energy value is combined with the system temperature and the ambient temperature in a recursive manner to obtain the target system temperature at which the reducer and the environment reach a thermal equilibrium state. The temperature rise performance of the reducer corresponds to the process of recursively changing the system temperature in the first time period to obtain the target system temperature. Therefore, this method can improve the reliability of the thermal equilibrium temperature of the reducer, better guide the design of various indicators of the reducer, and improve the performance of the reducer and the user experience effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0048] Figure 1 Schematic diagram of the process of the thermal equilibrium temperature prediction method of the reducer in Example 1;

[0049] Figure 2 This is a schematic diagram of the process of obtaining the first thermal energy value in Example 1;

[0050] Figure 3 This is a schematic diagram of the process of obtaining the thermal equilibrium temperature in Example 1;

[0051] Figure 4 This is a schematic diagram of a process for determining the thermal equilibrium temperature according to the temperature change relationship of each interval time in Example 1;

[0052] Figure 4-1 Schematic diagram of the temperature rise curve of the system temperature of the reducer in Example 1;

[0053] Figure 5 It is a structural schematic diagram of the thermal balance temperature prediction device of the reducer in Example 2;

[0054] Figure 6 This is a schematic diagram of the structure of the thermal balance temperature prediction system of the reducer in Example 3. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the various features of the present invention and the embodiments can be combined with each other, all within the protection scope of the present invention.

[0056] Example 1

[0057] A reducer is a power transmission mechanism that uses a gear speed converter to reduce the number of revolutions of the motor to the desired number of revolutions and obtain a larger torque. The main functions of the reducer are: reducing speed while increasing output torque. The torque output ratio is the motor output multiplied by the reduction ratio, but it should be noted that it cannot exceed the rated torque of the reducer. The reduction in inertia of the load is also reduced by the square of the reduction ratio. The reducer can change the direction of power transmission by 90° (when the engine is longitudinally mounted), reduce the speed, and increase the torque to ensure that the car has sufficient traction and appropriate speed on a good road surface.

[0058] During the working process, the reducer continuously exchanges heat with the external environment, and finally the heat energy generated by the reducer and the external environment can reach a thermal equilibrium state, so that the system temperature of the reducer no longer continues to rise. The system temperature of the reducer corresponding to the thermal equilibrium state is recorded as the thermal equilibrium temperature. If the thermal equilibrium temperature is too high, it will affect the working performance of various components of the reducer. When the car is driving at high speed, if there is a problem with the reducer, it will cause very serious consequences. Therefore, how to determine the relationship between the thermal equilibrium temperature and the various functional components of the reducer is an important reference indicator for the design of the reducer.

[0059] See also Figure 1 , Figure 1 The method for predicting the thermal equilibrium temperature of a reducer in Embodiment 1 of the present invention is mainly used in vehicle equipment, especially in new energy vehicle equipment. The method includes:

[0060] S1: Obtaining motion parameters and system temperature of the reducer, as well as the ambient temperature of the current environment where the reducer is located;

[0061] Specifically, the motion parameters of the reducer are collected, where the motion parameters are the power losses of various functional components of the reducer, including but not limited to the power losses corresponding to bearing rotation, gear meshing, oil seal friction and oil stirring. At the same time, the current external ambient temperature is collected, where the initial temperature of the reducer is the initial ambient temperature. The system temperature will continue to rise due to the heat energy generated inside the reducer. Eventually, the heat energy generated inside the reducer and the heat energy dissipated by environmental heat exchange reach a balance, so that the temperature of the reducer no longer continues to rise.

[0062] S2: obtaining a first heat energy value generated by the reducer in any period of time according to the motion parameter;

[0063] Specifically, based on the power loss of each functional component of the reducer, the first thermal energy value generated by the reducer in any time period is obtained. The first thermal energy value causes the system temperature of the reducer to increase. As the temperature of the reducer continues to increase, part of the first thermal energy value generated will be dissipated through ambient heat exchange. When the system temperature of the reducer can no longer increase, the heat energy dissipated through ambient heat exchange will approach the first thermal energy value, and thermal equilibrium is reached at this time.

[0064] In one embodiment, see Figure 2 , said S2 comprises:

[0065] S21: Get the interval length of the current period;

[0066] S22: According to the interval length, use formula Q n =(W1+W2+…W m )*Δt n Obtaining a first heat energy value generated within an interval duration corresponding to the current time period;

[0067] Among them, Q n is the first thermal energy value corresponding to the energy generated by the reducer in the nth interval, W m is the power loss generated by the mth type of reducer mechanism, which includes at least one of the following: bearings, gears, oil seals and oil stirring mechanisms, Δt n is the duration corresponding to the nth interval duration, where m and n are positive integers.

[0068] Specifically, multiple time periods are set, and the intervals between the time periods can be equal or unequal. Using the formula Q n =(W1+W2+…W m )*Δt n The first thermal energy value corresponding to the energy generated by the reducer in any time period can be obtained, so as to obtain the current system temperature in combination with the ambient temperature by recursive method.

[0069] S3: according to the first thermal energy values, the ambient temperature and the system temperature in any time period, a thermal equilibrium temperature between the reducer and the environment is obtained by recursion.

[0070] Specifically, the system temperature is a temperature that changes continuously with the working state of the reducer, that is, if the reducer has never started to work and changes to a normal working state, the system temperature increases from the initial ambient temperature to the temperature of the thermal equilibrium state; the system temperature in each time period is gradually obtained by combining the first thermal energy value generated by the reducer in each time period with the ambient temperature; the thermal equilibrium temperature of the reducer is determined according to each system temperature, and further, the method for determining the thermal equilibrium temperature includes but is not limited to: directly comparing each system temperature, determining the thermal equilibrium temperature according to the rate of change or difference of each system temperature, and / or determining the thermal equilibrium temperature according to the rate of change or difference of the first thermal energy value generated by the reducer and the second thermal energy value of the generated heat energy dissipated through the heat dissipation system.

[0071] In one embodiment, see Figure 3 , said S3 comprises:

[0072] S31: Obtaining the heat exchange coefficient of the reducer and the outer surface area of ​​the reducer;

[0073] Specifically, the heat exchange capacity between the reducer and the external environment is mainly affected by the heat exchange coefficient and the external surface area.

[0074] S32: According to the outer surface area and the heat exchange coefficient, using the formula q n =(T n-1 -T E )×S×H×Δt n Obtaining a second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment at each interval time;

[0075] Specifically, according to the system temperature and ambient temperature in the previous period, the formula q n =(T n-1 -T E )×S×H×Δt n The heat energy of heat exchange between the reducer and the external environment in each time interval is obtained as the second heat energy value, such as: Assume the interval time Δt n The duration is t constant, and at the initial state t0, the system temperature T0 is equal to the ambient temperature T E In this stage, there is no heat exchange energy dissipation q0 = 0; at time t1, the heat exchange energy q1 = (T0-T E )×S×H×t, at time t2, q2=(T1-T E )×S×H×t, and so on. n Moment, q n =(T n-1 -T E )×S×H×t.

[0076] S33: obtaining the thermal equilibrium temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval time;

[0077] Among them, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, T E is the ambient temperature, Δt n is the duration corresponding to the nth interval, H is the heat exchange coefficient, and S is the outer surface area of ​​the reducer.

[0078] Specifically, the second thermal energy value obtained each time is compared with the first thermal energy value. When the difference between the second thermal energy value and the first thermal energy value is within a preset threshold, it means that the system temperature and the ambient temperature at this time have reached a thermal equilibrium state, and the thermal equilibrium temperature is obtained.

[0079] In one embodiment, see Figure 4 , the S33 comprises:

[0080] S331: Obtaining the system heat capacity of the reducer;

[0081] S332: Based on the system heat capacity, use the formula T n =T n-1 +(Q n -q n ) / C to obtain the system temperature corresponding to the reducer in each interval time, wherein each interval time is the same;

[0082] S333: Obtaining a thermal equilibrium temperature by comparing the change relationship of the system temperature at each interval time;

[0083] Where C is the system heat capacity, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, T n is the system temperature of the reducer corresponding to the nth interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, Q n It is the first thermal energy value corresponding to the energy dissipation generated by the reducer in the nth interval duration.

[0084] Specifically, the system temperature of the reducer in each time period is obtained using the formula. As time goes by, the rate of increase of the system temperature becomes lower and lower until it reaches a stable temperature, such as Figure 4-1 The temperature rise curve of the reducer system is shown. By comparing the temperatures of each system, the thermal equilibrium temperature is determined, including but not limited to setting the system temperature to decrease or increase less than the threshold difference temperature within the adjacent time length, or the difference of the second thermal energy within the adjacent time length is less than the thermal energy difference threshold, or the difference of the first thermal energy and the second thermal energy is less than the thermal energy threshold (specifically, before the reducer starts working, the system temperature is equal to the ambient temperature, at this time q n is zero. As the system temperature continues to rise, the first heat energy Q n Second heat energy q for heat exchange n Continues to increase, when thermal equilibrium is reached, the second thermal energy q n Approaching the first thermal energy Q n ).

[0085] In one embodiment, the S333 includes:

[0086] S3331: Obtaining the temperature change rate threshold of the reducer;

[0087] S3332: Compare the ratio of the current system temperature of the reducer to the previous system temperature with the temperature change rate threshold. If the requirements are met, output the current system temperature as the target system temperature.

[0088] Specifically, a temperature-time curve is established for the system temperature at each time point after the reducer starts running, the real-time change rate of the system temperature is obtained through the temperature-time curve, and a temperature change rate threshold of adjacent change rates is set. When the temperature change rate is less than the temperature change rate threshold, the current system temperature is output as the thermal equilibrium temperature.

[0089] In one embodiment, after S333, the method further includes:

[0090] S334: Obtaining the heat exchange coefficient of the reducer and the outer surface area of ​​the reducer;

[0091] S335: According to the system temperature corresponding to the multiple thermal equilibria, a mapping relationship T' between the thermal equilibrium temperature and the ambient temperature, the motion parameter, the heat exchange coefficient and the outer surface area is obtained. n =T E +(W1+W2+…W m ) / (S*H);

[0092] Among them, T' n is the predicted system temperature corresponding to thermal equilibrium after n intervals, T E is the current ambient temperature, H is the heat exchange coefficient, S is the outer surface area of ​​the reducer, W m is the power loss generated by the mth type mechanism of the reducer, where m and n are integers, and the mechanism includes at least one of the following: bearings, gears, oil seals and oil stirring mechanisms.

[0093] Specifically, multiple tests are performed on different reducers to obtain the system temperatures corresponding to each test and the final thermal equilibrium temperature, and the mapping relationship between the thermal equilibrium temperature, reducer parameters, and ambient temperature is found. Further, the mapping relationship is T' n =T E +(W1+W2+…W m ) / (S*H); where T' n is the predicted system temperature corresponding to thermal equilibrium after n intervals, T E is the current ambient temperature, H is the heat exchange coefficient, S is the outer surface area of ​​the reducer, W m is the power loss generated by the mth type of mechanism of the reducer, where m is an integer. Through this mapping relationship, various parameters of the reducer can be designed as needed, thereby improving the performance of the reducer and enhancing the user experience.

[0094] In one embodiment, the motion parameter includes at least one of the following: bearing rotation, gear meshing, oil seal friction, and power loss corresponding to oil stirring.

[0095] The thermal equilibrium temperature prediction method of the reducer of this embodiment is adopted. By acquiring the motion parameters of the existing reducer, as well as the system temperature and the current ambient temperature, the first thermal energy value generated in each period when the reducer is in operation is calculated, and the thermal equilibrium temperature of the reducer and the environment is obtained by combining the first thermal energy value with the system temperature and the ambient temperature in an iterative manner. This method can improve the reliability of the thermal equilibrium temperature of the reducer, better guide the design of various indicators of the reducer, and improve the performance of the reducer and user experience.

[0096] Example 2

[0097] Embodiment 2 of the present invention further provides a heat balance temperature prediction device for a reducer based on the method of embodiment 1, see Figure 5 , the device comprises:

[0098] Parameter acquisition module: used to obtain the motion parameters and system temperature of the reducer, as well as the ambient temperature of the current environment where the reducer is located;

[0099] Data conversion module: the user obtains the first heat energy value generated by the reducer in any period of time according to the motion parameters;

[0100] Data processing module: used for obtaining the thermal equilibrium temperature between the reducer and the environment by recursion according to the first thermal energy values, the ambient temperature and the system temperature in any time period.

[0101] The thermal equilibrium temperature prediction device of the reducer of this embodiment is used to obtain the motion parameters of the existing reducer, as well as the system temperature and the current ambient temperature, and calculate the first thermal energy value generated in each period when the reducer is in operation. The thermal equilibrium temperature of the reducer and the environment is obtained by combining the first thermal energy value with the system temperature and the ambient temperature in an iterative manner. This method can improve the reliability of the thermal equilibrium temperature of the reducer, better guide the design of various indicators of the reducer, and improve the performance of the reducer and user experience.

[0102] In one embodiment, the data conversion module includes:

[0103] Time information acquisition unit: obtains the interval duration of the current period;

[0104] First thermal energy value unit: according to the interval length, using the formula Q n =(W1+W2+…W m )*Δt n Obtaining a first heat energy value generated within an interval duration corresponding to the current time period;

[0105] Among them, Q n is the first heat energy value corresponding to the energy dissipation generated by the reducer in the nth interval, W m is the power loss generated by the mth type mechanism of the reducer, Δt n is the duration corresponding to the nth interval duration.

[0106] In one embodiment, the data processing module includes:

[0107] Reducer parameter unit: obtain the heat exchange coefficient of the reducer and the outer surface area of ​​the reducer;

[0108] Second thermal energy value unit: According to the outer surface area and the heat exchange coefficient, using the formula q n =(Tn-1 -T E )×S×H×Δt n Obtaining a second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment at each interval time;

[0109] Thermal balance mapping unit: obtaining the thermal balance temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval time length;

[0110] Among them, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, T E is the ambient temperature, Δt n is the duration corresponding to the nth interval, H is the heat exchange coefficient, and S is the outer surface area of ​​the reducer.

[0111] In one embodiment, the heat balance unit comprises:

[0112] Heat capacity unit: obtain the system heat capacity of the reducer;

[0113] System temperature unit: According to the system heat capacity, use the formula T n =T n-1 +(Q n -q n ) / C to obtain the system temperature corresponding to the reducer in each interval time, wherein each interval time is the same;

[0114] Thermal balance unit: obtains thermal equilibrium temperature by comparing the change relationship of the system temperature at each interval;

[0115] Where C is the system heat capacity, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, T n is the system temperature of the reducer corresponding to the nth interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, Q n It is the first thermal energy value corresponding to the energy dissipation generated by the reducer in the nth interval duration.

[0116] In one embodiment, the heat balance unit comprises:

[0117] The first parameter unit: obtains the heat exchange coefficient of the reducer and the outer surface area of ​​the reducer;

[0118] The first calculation unit: according to the system temperature corresponding to multiple thermal balances, obtains the mapping relationship T' between the thermal balance temperature and the ambient temperature, the motion parameter, the heat exchange coefficient and the outer surface arean =T E +(W1+W2+…W m ) / (S*H);

[0119] Among them, T' n is the predicted system temperature corresponding to thermal equilibrium after n intervals, T E is the current ambient temperature, H is the heat exchange coefficient, S is the outer surface area of ​​the reducer, W m is the power loss generated by the mth type mechanism of the reducer, where m and n are integers, and the mechanism includes at least one of the following: bearings, gears, oil seals and oil stirring mechanisms.

[0120] In one embodiment, the motion parameter includes at least one of the following: power loss of bearing rotation, power loss of gear meshing, power loss of oil seal friction and power loss of oil stirring.

[0121] The thermal equilibrium temperature prediction device of the reducer of this embodiment is used to obtain the motion parameters of the existing reducer, as well as the system temperature and the current ambient temperature, and calculate the first thermal energy value generated in each period when the reducer is in operation. The thermal equilibrium temperature of the reducer and the environment is obtained by combining the first thermal energy value with the system temperature and the ambient temperature in an iterative manner. This method can improve the reliability of the thermal equilibrium temperature of the reducer, better guide the design of various indicators of the reducer, and improve the performance of the reducer and user experience.

[0122] Example 3

[0123] The present invention provides a vending machine device and a storage medium, such as Figure 6 As shown, the system comprises at least one processor, at least one memory and computer program instructions stored in the memory.

[0124] Specifically, the processor may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present invention.

[0125] The memory may include a large capacity memory for data or instructions. By way of example and not limitation, the memory may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. Where appropriate, the memory may include a removable or non-removable (or fixed) medium. Where appropriate, the memory may be inside or outside a data processing device. In a particular embodiment, the memory is a non-volatile solid-state memory. In a particular embodiment, the memory includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or a flash memory or a combination of two or more of these.

[0126] The processor implements any one of the heat balance temperature prediction methods for the reducer in the first embodiment described above by reading and executing computer program instructions stored in the memory.

[0127] In one example, the electronic device may further include a communication interface and a bus, wherein the processor, the memory, and the communication interface are connected via the bus and communicate with each other.

[0128] The communication interface is mainly used to implement communication between the modules, devices, units and / or equipment in the embodiments of the present invention.

[0129] Bus includes hardware, software or both, and the parts of electronic equipment are coupled to each other.For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In suitable cases, bus may include one or more buses. Although the embodiment of the present invention describes and shows a specific bus, the present invention considers any suitable bus or interconnection.

[0130] In summary, the embodiments of the present invention provide a method, device, system and equipment for predicting the thermal balance temperature of a reducer.

[0131] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present invention.

[0132] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating the temperature rise performance of a reducer based on thermal balance, characterized in that: The method comprises: Acquire the motion parameters of the reducer and the ambient temperature of the current environment where the reducer is located; wherein the motion parameters are the power loss of each functional component of the reducer; According to the power loss, a first heat energy value generated by the reducer in any period of time is obtained; Obtaining a system temperature of the reducer in the first period of time according to the first heat energy value in the first period of time and the ambient temperature; According to the first thermal energy values, the ambient temperature and the system temperature in any time period, a recursive method is used to calculate until a target system temperature is obtained in which the reducer and the environment reach a thermal equilibrium state; wherein the temperature rise performance of the reducer corresponds to the recursive change of the system temperature in the first time period to obtain the target system temperature.

2. The method for calculating the temperature rise performance of a reducer based on thermal balance according to claim 1, characterized in that: The obtaining, according to the power loss, a first heat energy value generated by the reducer in any period of time comprises: Get the interval duration of the current period; According to the interval length, using the formula Q n =(W1+W2+…W m )*Δt n Obtaining a first heat energy value generated within an interval duration corresponding to the current time period; Among them, Q n is the first thermal energy value corresponding to the energy generated by the reducer in the nth interval, W m is the power loss generated by the mth type of reducer mechanism, which includes at least one of the following: bearings, gears, oil seals and oil stirring mechanisms, Δt n is the duration corresponding to the nth interval duration, where m and n are positive integers.

3. The method for calculating the temperature rise performance of a reducer based on thermal balance according to claim 2, characterized in that: The step of obtaining the system temperature of the reducer in the first period of time according to the first heat energy value in the first period of time and the ambient temperature includes: Get the system heat capacity of the reducer; According to the first thermal energy value of the first period, the ambient temperature and the system heat capacity, the formula T1=T E +Q1 / C gets the system temperature in the first period; Wherein, C is the system heat capacity, T1 is the system temperature of the reducer corresponding to the first interval duration, and Q1 is the first thermal energy value corresponding to the energy dissipation generated by the reducer in the first interval duration.

4. The method for calculating the temperature rise performance of a reducer based on thermal balance according to claim 1, characterized in that: The step of calculating, according to each of the first heat energy values, the ambient temperature and the system temperature in any time period, by recursive method until a target system temperature is obtained in which the reducer and the environment reach a thermal equilibrium state comprises: Obtain the heat exchange coefficient of the reducer and the outer surface area of ​​the reducer; According to the outer surface area and the heat exchange coefficient, using the formula q n =(T n-1 -T E )×S×H×Δt n Obtaining a second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment at each interval time; Obtaining the target system temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval time length; Among them, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, T E is the ambient temperature, Δt n is the duration corresponding to the nth interval, H is the heat exchange coefficient, and S is the outer surface area of ​​the reducer.

5. The method for calculating the temperature rise performance of a reducer based on thermal balance according to claim 4, characterized in that: The obtaining the target system temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval duration includes: Get the system heat capacity of the reducer; According to the system heat capacity, using the formula T n =T n-1 +(Q n -q n ) / C to obtain the system temperature corresponding to the reducer in each interval time, wherein each interval time is the same; The target system temperature is obtained by comparing the change relationship of the system temperature at each interval time; Where C is the system heat capacity, T n-1 is the system temperature of the reducer corresponding to the n-1th interval duration, T n is the system temperature of the reducer corresponding to the nth interval duration, q n is the second heat energy value corresponding to the heat exchange dissipation between the reducer and the environment in the nth interval, Q n It is the first thermal energy value corresponding to the energy dissipation generated by the reducer in the nth interval duration.

6. The method for calculating the temperature rise performance of a reducer based on thermal balance according to claim 5, characterized in that: The obtaining of the target system temperature by comparing the change relationship of the system temperature at each interval time includes: Get the temperature change rate threshold of the reducer; The ratio of the current system temperature of the reducer to the previous system temperature is compared with the temperature change rate threshold. If it meets the requirements, the current system temperature is output as the target system temperature.

7. The method for calculating the temperature rise performance of a reducer based on thermal balance according to claim 4, characterized in that: The obtaining the target system temperature according to the first thermal energy value and the second thermal energy value corresponding to each interval duration includes: Get the thermal energy difference threshold of the reducer; 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 the thermal energy difference threshold, the current system temperature is output as the target system temperature.

8. A device for calculating the temperature rise performance of a reducer based on thermal balance, characterized in that: The device comprises: Parameter acquisition module: used to obtain the motion parameters of the reducer and the ambient temperature of the current environment where the reducer is located; wherein the motion parameters are the power loss of each functional component of the reducer; Data conversion module: used for obtaining the first heat energy value generated by the reducer in any period of time according to the power loss; A temperature calculation module, used for obtaining a system temperature of the reducer in the first period according to the first heat energy value in the first period and the ambient temperature; Data processing module: used to calculate by recursive method according to the first thermal energy values, the ambient temperature and the system temperature in any time period until the target system temperature at which the reducer and the environment reach a thermal equilibrium state is obtained; wherein, the temperature rise performance of the reducer corresponds to the recursive change of the system temperature in the first time period to obtain the target system temperature.

9. A heat balance-based reducer temperature rise performance calculation system, characterized in that: include: At least one processor, at least one memory and computer program instructions stored in the memory, when the computer program instructions are executed by the processor, implement the method according to any one of claims 1 to 7.

10. A vehicle device, characterized in that: Including the reducer temperature rise performance calculation system based on thermal balance as described in claim 9.

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