An automatic mine-blocking vehicle thermal management system matching method and a thermal management system

Abstract

The present application relates to a kind of automatic block mine car thermal management system matching method and thermal management system.The present application constructs heat dissipation demand calculation model to calculate the heat dissipation demand under different working conditions under heavy load working condition, heavy load working condition, start-up variable torque condition;A one-dimensional cooling simulation model is established for the automatic block mine car thermal management system;Three-dimensional simulation model is established by applying the three-dimensional numerical model of vehicle and fan performance data, the surface wind speed distribution of radiator under different working conditions, vehicle speed and fan speed is calculated, and the surface wind speed distribution of radiator is imported into one-dimensional cooling simulation model;The radiator heat dissipation, oil cooler heat dissipation, radiator outlet water temperature and oil cooler outlet oil temperature under heavy load working condition, heavy load working condition and start-up variable torque condition calculated by applying the one-dimensional cooling simulation model are matched with heat dissipation demand, engine water temperature demand and gearbox oil temperature demand, and the matching result of the automatic block mine car thermal management system meeting the requirements is obtained by continuous iteration calculation.

Description

Technical Field

[0001] This invention relates to the field of thermal management system control, and more particularly to a matching method for the thermal management system of an automatic transmission mining car and the thermal management system thereof. Background Technology

[0002] Due to the harsh operating conditions of mining sites, including muddy, gravel, and dirt roads, mining trucks often operate under heavy loads on uphill or downhill sections, placing high demands on their power and consequently on the cooling capacity of their thermal management systems. The effective operation of these systems is crucial to the overall reliability and performance of the mining trucks. Automatic transmission mining trucks equipped with hydraulic automatic gearboxes can meet the driving habits of foreign countries, reducing fatigue during long drives and improving vehicle safety. Furthermore, mining trucks equipped with high-torque hydraulic automatic gearboxes can achieve high-torque power transmission, enhancing their ability to handle complex road conditions and showing promising application prospects. Because of the inclusion of hydraulic torque converters and retarders, the three most severe operating conditions—heavy load operation, heavy load deceleration, and start-up torque conversion—place even higher demands on the cooling capacity of the automatic transmission mining truck's thermal management system. Accurately calculating the cooling requirements under these three conditions is key to finding the right thermal management system for automatic transmission mining trucks. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides a matching method and a thermal management system for an automatic transmission mining car.

[0004] In a first aspect, the present invention provides a matching method for an automatic transmission mining car thermal management system, comprising:

[0005] A heat dissipation demand calculation model is constructed for heavy load working conditions, heavy load low working conditions, and starting torque change working conditions to calculate the heat dissipation demand under different working conditions.

[0006] A one-dimensional cooling simulation model was established for the thermal management system of automatic transmission mining trucks; a three-dimensional simulation model was established using the three-dimensional model of the whole vehicle and fan performance data, and the wind speed distribution on the radiator surface was calculated under different working conditions, vehicle speed and fan speed, and the wind speed distribution on the radiator surface was imported into the one-dimensional cooling simulation model.

[0007] The heat dissipation of the radiator, the heat dissipation of the oil cooler, the water outlet temperature of the radiator, and the oil outlet temperature of the oil cooler under the heavy load, heavy load on-the-go, and starting torque-changing conditions are calculated using the one-dimensional cooling simulation model. These values ​​are then compared and matched with the heat dissipation requirements, engine water temperature requirements, and transmission oil temperature requirements under the three conditions. Through continuous iterative calculations, a matching result for the thermal management system of the automatic transmission mining truck that meets the requirements is obtained.

[0008] Furthermore, the heavy-load working condition refers to the downhill working condition when the mine car is fully loaded, with the engine at idle speed, the hydraulic automatic transmission in a constant torque state, and the hydraulic retarder of the hydraulic automatic transmission in an active state; the starting torque-changing working condition refers to the hydraulic automatic transmission in a torque-changing state when the mine car is fully loaded, the engine at its maximum torque operating point, and the hydraulic retarder in a non-active state; and when the mine car is fully loaded in the starting torque-changing working condition, the hydraulic automatic transmission in a torque-changing state, the engine at its maximum torque operating point, and the hydraulic retarder in a non-active state.

[0009] Furthermore, the calculation models for heat dissipation requirements under heavy-load conditions, heavy-load low-load conditions, and start-up torque-changing conditions include:

[0010] ;

[0011] in, Q 1 represents the total heat dissipation requirement under heavy load conditions; Q T This refers to the cooling requirements at the engine's maximum torque operating point. Q 2 represents the total heat dissipation requirement under heavy load conditions; Q d To meet the heat dissipation requirements of the engine at idle speed; Q h To meet the heat dissipation requirements of the hydraulic retarder during operation; Q 3 represents the total heat dissipation requirement under starting torque conversion conditions; Q b To meet the heat dissipation requirements of hydraulic automatic transmissions under torque conversion conditions; m For the heavy load capacity of the mining car; i Slope; v For vehicle speed; t For time; Q m Heat is generated by friction in the engine; Q p Heat is generated by exhaust braking; Q g To generate heat for braking within the engine cylinders; T B For the pump wheel torque of the hydraulic automatic transmission, n B This refers to the pump impeller speed; This refers to the torque converter efficiency of a hydraulic automatic transmission.

[0012] Furthermore, the one-dimensional cooling simulation model is established based on the engine heat exchange performance diagram, water pump transmission ratio, efficiency and volume, radiator size and heat dissipation performance data, oil cooler heat dissipation performance data, transmission oil flow characteristics, and three-dimensional size data of the cooling pipes. The one-dimensional cooling simulation model uses the radiator surface wind speed distribution calculated by the three-dimensional simulation model to calculate the radiator heat dissipation, oil cooler heat dissipation, radiator outlet water temperature and oil cooler outlet oil temperature of the thermal management system under three operating conditions: heavy load condition, heavy load on-load condition and starting torque change condition.

[0013] Furthermore, the three-dimensional simulation model is established based on the three-dimensional digital model of the mining truck, radiator data fitting, vehicle speed under three working conditions (heavy load, heavy load on-load, and starting torque change), and the rotational speed of the cooling fan under the three working conditions (heavy load, heavy load on-load, and starting torque change).

[0014] Furthermore, under the heavy-load operating condition, the heat dissipation of the radiator calculated by the one-dimensional cooling simulation model is compared with the total heat dissipation under the heavy-load operating condition. The radiator outlet water temperature is also compared with the engine's allowable temperature. If either of the above two items fails to match, iterative calculation is performed. 。

[0015] Furthermore, under the heavy-load operating condition, the heat dissipation of the radiator calculated by the one-dimensional cooling simulation model is compared with the total heat dissipation under the heavy-load operating condition. The radiator outlet water temperature is compared with the engine's allowable temperature. The heat dissipation of the oil cooler is compared with the heat dissipation requirements of the hydraulic retarder during operation. The oil outlet temperature of the oil cooler is compared with the allowable temperature of the hydraulic automatic transmission. If any of the above four items fails to match, iterative calculation is performed.

[0016] Furthermore, under the starting torque conversion condition, the heat dissipation of the radiator calculated by the one-dimensional cooling simulation model is compared with the total heat dissipation under the starting torque conversion condition. The radiator outlet water temperature is compared with the engine's allowable temperature. The heat dissipation of the oil cooler is compared with the heat dissipation requirements of the hydraulic automatic transmission under the torque conversion condition. The oil cooler outlet oil temperature is compared with the allowable temperature of the hydraulic automatic transmission. If any of the above four items fails to match, iterative calculation is performed.

[0017] Secondly, the present invention provides a thermal management system for implementing the aforementioned automatic transmission mining car thermal management system matching method, comprising: a radiator, a cooling fan installed at the radiator, a radiator inlet connected to a radiator water inlet pipe, a thermostat installed on the radiator water inlet pipe, the radiator water inlet pipe connected to the secondary side outlet of an oil cooler, the secondary side outlet of the oil cooler connected to a radiator water outlet pipe via a pipeline, the radiator water outlet pipe connected to the radiator outlet, a water pump connected to the radiator water outlet pipe, and the thermostat connected to the water pump. The primary side of the oil cooler is connected to a hydraulic automatic transmission, and the hydraulic automatic transmission is connected to an engine via a drive shaft. The radiator water outlet pipe and the radiator water inlet pipe pass through the engine. The engine and the hydraulic automatic transmission are separate units. When the thermostat is open, the coolant flows sequentially through the radiator, radiator outlet pipe, water pump, engine, oil cooler secondary side, engine, radiator inlet pipe, and thermostat back to the radiator, forming a large circulation loop in the cooling system. When the thermostat is closed, the coolant flows sequentially through the water pump, engine, oil cooler secondary side, engine, and thermostat, forming a small circulation loop in the cooling system. Both the large and small circulation coolant loops pass through the oil cooler secondary side. For the primary side circuit of the oil cooler, the lubricating oil flows sequentially through the hydraulic automatic transmission, oil cooler inlet pipe, and oil cooler primary side, then returns to the hydraulic automatic transmission via oil cooler outlet pipe. The lubricating oil in the primary side and the coolant in the secondary side of the oil cooler flow in opposite directions.

[0018] The technical solutions provided in the embodiments of the present invention have the following advantages compared with the prior art:

[0019] This invention establishes a calculation model for the thermal management requirements of automatic transmission mining trucks under three severe operating conditions: heavy-load upper condition, heavy-load lower condition, and starting torque-changing condition. Through the combined application of three-dimensional simulation and one-dimensional simulation, a calculation and analysis iterative model for the thermal management system of automatic transmission mining trucks under multiple operating conditions is established. This model can accurately calculate the heat dissipation requirements of the thermal management system under the three operating conditions, realize the rapid matching of the thermal management system of automatic transmission mining trucks, improve the matching efficiency of the thermal management system, and thus further enhance the reliability of mining trucks. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1The diagram shown is a structural schematic of the thermal management system of the present invention.

[0023] Figure 2 The diagram shows the steps of a matching method for an automatic transmission mine car thermal management system according to the present invention.

[0024] Figure 3 The figure shown is a three-dimensional simulation diagram of the present invention;

[0025] The labels and their meanings in the diagram are as follows: 101, radiator; 102, cooling fan; 103, engine; 104, water pump; 105, thermostat; 106, hydraulic automatic transmission; 107, oil cooler; 108, drive shaft; 109, radiator outlet pipe; 110, radiator inlet pipe; 111, oil cooler inlet pipe; 112, oil cooler outlet pipe; 113, frame longitudinal beam. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] See Figure 1As shown, this embodiment of the invention provides a matching method for an automatic transmission mining car's thermal management system, applied to mining cars equipped with a thermal management system. In a specific implementation, an exemplary thermal management system structure includes: a radiator 101, a cooling fan 102 installed at the radiator, a radiator inlet pipe 110 connected to the inlet of the radiator 101, a thermostat 105 installed on the radiator inlet pipe 110, the radiator inlet pipe connected to the secondary outlet of an oil cooler 107, the secondary outlet of the oil cooler 107 connected via a pipeline to a radiator outlet pipe 109, the radiator outlet pipe 109 connected to the outlet of the radiator 101, a water pump 104 connected to the radiator outlet pipe 109, and the thermostat 105 connected to the water pump 104. The primary side of the oil cooler 107 is connected to a hydraulic automatic transmission 106, and the hydraulic automatic transmission 106 is connected to an engine 103 via a drive shaft. The radiator outlet pipe 109 and the radiator inlet pipe 110 pass through the engine 103. The engine 103 and the hydraulic automatic transmission 106 are separate units. When the thermostat 105 is open, the coolant flows sequentially through the radiator 101, radiator outlet pipe 109, water pump 104, engine 103, secondary side of oil cooler 107, engine 103, radiator inlet pipe 110, and thermostat 105 back to the radiator 101 to form a large circulation of the cooling system. When the thermostat 105 is closed, the coolant flows sequentially through the water pump 104, engine 103, secondary side of oil cooler 107, and engine 103 to the thermostat 105 to form a small circulation of the cooling system. The coolant in both the large and small circulation circulations flows through the secondary side of oil cooler 107. For the primary circuit of the oil cooler 107, the lubricating oil passes sequentially through the hydraulic automatic transmission 106, the oil cooler inlet pipe, and the primary side of the oil cooler 107, and then returns to the interior of the hydraulic automatic transmission 106 through the oil cooler outlet pipe. The lubricating oil in the primary side and the coolant in the secondary side of the oil cooler 107 flow in opposite directions.

[0029] like Figure 2 As shown, the matching method for the thermal management system of an automatic transmission mining car includes the following steps:

[0030] S204. Obtain the parameters for creating the 3D simulation model and the 1D cooling simulation model.

[0031] The parameters include: engine heat exchange performance diagram, water pump transmission ratio, efficiency and volume, radiator size and heat dissipation performance data, oil cooler heat dissipation performance data, transmission oil flow characteristics, three-dimensional dimension data of cooling pipes, vehicle weight parameters and vehicle speed parameters, cooling fan performance parameters, radiator structure, length, width and height parameters of the radiator core, radiator performance parameters including water resistance and wind resistance at various water flow rates and wind speeds, coolant inlet temperature, coolant outlet temperature, cooling air inlet temperature, and cooling air outlet temperature parameters, transmission oil flow characteristics (including lubricating oil flow and temperature under torque converter torque conversion conditions), oil flow and temperature under hydraulic retarder operating conditions, and oil cooler data including lubricating oil outlet and inlet temperatures at various lubricating oil flow rates and coolant flow rates, and coolant outlet and inlet temperatures.

[0032] S206. Construct a calculation model for the heat dissipation requirements of the thermal management system of automatic transmission mining truck under heavy load, heavy load, and starting torque change conditions, based on the working conditions.

[0033] The heavy-load working condition refers to the uphill working condition when the mine car is fully loaded. Under the heavy-load working condition, the engine operates at its maximum torque point, the hydraulic automatic transmission is in a constant torque state, and the hydraulic automatic transmission is equipped with a hydraulic retarder, which is in a non-operating state under the heavy-load working condition.

[0034] The heavy-load operating condition refers to the downhill operation when the mine car is fully loaded. Under this heavy-load operating condition, the engine is at its idle speed, the hydraulic automatic transmission is in a constant torque state, and the hydraulic retarder is in operation.

[0035] When the mining car is fully loaded during the starting torque conversion condition, the hydraulic automatic transmission is in torque conversion mode, the engine is at its maximum torque operating point, and the hydraulic retarder is in a non-operating state.

[0036] Construct a calculation model for the heat dissipation requirements of the aforementioned heavy-load upper operating condition, heavy-load lower operating condition, and start-up torque-changing operating condition. Q 1 、Q 2 and Q 3 as follows:

[0037] ;

[0038] in, Q 1 represents the total heat dissipation under heavy load conditions; Q T This refers to the cooling requirements at the engine's maximum torque operating point. Q 2 represents the total heat dissipation under heavy load conditions; Q d To meet the heat dissipation requirements of the engine at idle speed; Q hTo meet the heat dissipation requirements of the hydraulic retarder during operation; Q 3 represents the total heat dissipation during start-up torque conversion; Q b To meet the heat dissipation requirements of hydraulic automatic transmissions under torque conversion conditions; m For the heavy load capacity of the mining car; i Slope; v For vehicle speed; t For time; Q m Heat is generated by friction in the engine; Q p Heat is generated by exhaust braking; Q g To generate heat for braking within the engine cylinders; T B For the pump wheel torque of the hydraulic automatic transmission, n B This refers to the pump impeller speed; This refers to the torque converter efficiency of a hydraulic automatic transmission.

[0039] In this application, the total heat dissipation under heavy load is taken as the heat dissipation requirement at the engine's maximum torque operating point, and the total heat dissipation under heavy load is taken as the sum of the heat dissipation requirement at engine idling and the heat dissipation requirement when the hydraulic retarder is working.

[0040] S208. For the thermal management system, a one-dimensional cooling simulation model is established based on the location of the thermal management system and the performance data of its components. A three-dimensional simulation model is then established using the vehicle's three-dimensional digital model and fan performance data to calculate the airflow distribution on the radiator surface under different operating conditions at vehicle speeds and fan speeds.

[0041] In the specific implementation process, please refer to Figure 3 As shown, the three-dimensional simulation model is established based on the three-dimensional digital model of the mining truck, radiator data fitting, and the vehicle speed and cooling fan speed under three working conditions: heavy load, heavy load on-load, and starting torque change. The three-dimensional simulation model is used to calculate the radiator surface airflow distribution under different working conditions. The one-dimensional cooling simulation model is established based on the engine heat exchange performance diagram, water pump transmission ratio, efficiency and volume, radiator size and heat dissipation performance data, oil cooler heat dissipation performance data, transmission oil flow characteristics, and three-dimensional dimensions of the cooling pipes. The airflow distribution on the radiator surface calculated by the three-dimensional simulation model is used to calculate the heat dissipation requirements and temperature indicators of the thermal management system under the three working conditions: heavy load, heavy load on-load, and starting torque change.

[0042] S210. The one-dimensional cooling simulation model uses the three-dimensional simulation model to calculate the airflow distribution on the radiator surface, and calculates the radiator heat dissipation, oil cooler heat dissipation, radiator outlet water temperature, and oil cooler outlet oil temperature under three working conditions: heavy load, heavy load on-load, and starting torque change.

[0043] S212. Compare the data obtained from the one-dimensional cooling simulation model with the heat dissipation requirements, engine water temperature requirements, and transmission oil temperature requirements under three working conditions—heavy load working condition, heavy load working condition, and starting torque conversion working condition—obtained from the heat dissipation requirement calculation model. Through continuous iterative calculation, a matching result of the automatic transmission mining truck thermal management system that meets the requirements is obtained.

[0044] Specifically, under the heavy-load operating condition, the radiator heat dissipation calculated by the one-dimensional cooling simulation model is compared with the total heat dissipation Q1 under the heavy-load operating condition. Simultaneously, the radiator outlet water temperature and the engine's allowable temperature are compared. If more than one of these matches fails, iterative calculations are performed to finally obtain the matching result of the automatic transmission mining truck's thermal management system under the heavy-load operating condition. Under the heavy-load operating condition, the radiator heat dissipation calculated by the one-dimensional cooling simulation model is compared with Q2. Simultaneously, the radiator outlet water temperature and the engine's allowable temperature are compared. The heat dissipation of the oil cooler 107 and Q2 are also compared. h For comparison, the oil outlet temperature of the oil cooler 107 is compared with the allowable temperature of the hydraulic automatic transmission. When more than one comparison fails, iterative calculation is performed to finally obtain the matching result of the thermal management system of the automatic transmission mining truck under heavy load conditions. Here, under the starting torque conversion condition, the heat dissipation of the radiator calculated by the one-dimensional cooling simulation model is compared with Q3, and the radiator outlet water temperature is compared with the allowable engine temperature. The heat dissipation of the oil cooler 107 and Q3 are also compared. b For comparison, the oil outlet temperature of the oil cooler 107 is compared with the allowable temperature of the hydraulic automatic transmission. When more than one comparison fails, iterative calculation is performed to finally obtain the matching result of the thermal management system of the automatic transmission mining truck under the starting torque conversion condition.

[0045] Example 2

[0046] This invention provides a thermal management system, including: a radiator, a cooling fan installed at the radiator, a radiator inlet connected to a radiator water inlet pipe, a thermostat installed on the radiator water inlet pipe, the radiator water inlet pipe connected to the secondary side outlet of an oil cooler, the secondary side outlet of the oil cooler connected to a radiator water outlet pipe via a pipeline, the radiator water outlet pipe connected to the radiator outlet, a water pump connected to the radiator water outlet pipe, and the thermostat connected to the water pump; the primary side of the oil cooler is connected to a hydraulic automatic transmission, the hydraulic automatic transmission being connected to an engine via a drive shaft; the radiator water outlet pipe and the radiator water inlet pipe pass through the engine; when the thermostat is open, the coolant... The coolant flows through the radiator, radiator outlet pipe, water pump, engine, oil cooler secondary side, engine, radiator inlet pipe, and thermostat back to the radiator to form a large circulation of the cooling system. When the thermostat is closed, the coolant flows through the water pump, engine, oil cooler secondary side, engine, and thermostat to form a small circulation of the cooling system. The coolant in both the large and small circulations of the cooling system flows through the oil cooler secondary side. For the primary circuit of the oil cooler, the lubricating oil flows through the hydraulic automatic transmission, oil cooler inlet pipe, and oil cooler primary side in sequence, and then returns to the hydraulic automatic transmission through the oil cooler outlet pipe. The lubricating oil in the primary side and the coolant in the secondary side of the oil cooler flow in opposite directions.

[0047] The thermal management system is controlled by an on-board controller, which executes the automatic transmission mining truck thermal management system matching method to control the thermal management system to meet the vehicle's heat dissipation requirements.

[0048] In the embodiments provided by this invention, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the circuit description and division are only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling shown or discussed may be indirect coupling through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0049] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A matching method for the thermal management system of an automatic transmission mining car, characterized in that, include: A heat dissipation demand calculation model is constructed for heavy load working conditions, heavy load unworking conditions, and starting torque change working conditions to calculate the heat dissipation demand under different working conditions. A one-dimensional cooling simulation model was established for the thermal management system of automatic transmission mining trucks. A three-dimensional simulation model was established using the vehicle's three-dimensional digital model and fan performance data. The wind speed distribution on the radiator surface was calculated under different operating conditions, vehicle speeds, and fan speeds. The wind speed distribution on the radiator surface was then imported into a one-dimensional cooling simulation model. The heat dissipation of the radiator, the heat dissipation of the oil cooler, the water outlet temperature of the radiator, and the oil outlet temperature of the oil cooler under the heavy load, heavy load on-the-go, and starting torque-changing conditions are calculated using the one-dimensional cooling simulation model. These values ​​are then compared and matched with the heat dissipation requirements, engine water temperature requirements, and transmission oil temperature requirements under the three conditions. Through continuous iterative calculations, a matching result for the thermal management system of the automatic transmission mining truck that meets the requirements is obtained.

2. The matching method for the thermal management system of an automatic transmission mining car according to claim 1, characterized in that, The heavy-load operating condition refers to the downhill condition when the mine car is fully loaded, with the engine at idle speed, the hydraulic automatic transmission in a constant torque state, and the hydraulic retarder of the hydraulic automatic transmission in an active state. The starting torque-changing condition refers to the hydraulic automatic transmission in a torque-changing state when the mine car is fully loaded, the engine at its maximum torque operating point, and the hydraulic retarder in a non-active state. In the starting torque-changing condition, when the mine car is fully loaded, the hydraulic automatic transmission in a torque-changing state, the engine at its maximum torque operating point, and the hydraulic retarder in a non-active state.

3. The matching method for the thermal management system of an automatic transmission mine car according to claim 1, characterized in that, The calculation models for heat dissipation requirements under heavy load conditions, heavy load low load conditions, and start-up torque-changing conditions include: ； in, Q 1 represents the total heat dissipation requirement under heavy load conditions; Q T This refers to the cooling requirements at the engine's maximum torque operating point. Q 2 represents the total heat dissipation requirement under heavy load conditions; Q d To meet the heat dissipation requirements of the engine at idle speed; Q h To meet the heat dissipation requirements of the hydraulic retarder during operation; Q 3 represents the total heat dissipation requirement under starting torque conversion conditions; Q b To meet the heat dissipation requirements of hydraulic automatic transmissions under torque conversion conditions; m For the heavy load capacity of the mining car; i Slope; v For vehicle speed; t For time; Q m Heat is generated by friction in the engine; Q p Heat is generated by exhaust braking; Q g To generate heat for braking within the engine cylinders; T B For the pump wheel torque of the hydraulic automatic transmission, n B This refers to the pump impeller speed; This refers to the torque converter efficiency of a hydraulic automatic transmission.

4. The matching method for the thermal management system of an automatic transmission mine car according to claim 1, characterized in that, The one-dimensional cooling simulation model is established based on the engine heat exchange performance diagram, water pump transmission ratio, efficiency and volume, radiator size and heat dissipation performance data, oil cooler heat dissipation performance data, transmission oil flow characteristics, and three-dimensional size data of the cooling pipes. The one-dimensional cooling simulation model uses the radiator surface wind speed distribution calculated by the three-dimensional simulation model to calculate the radiator heat dissipation, oil cooler heat dissipation, radiator outlet water temperature and oil cooler outlet oil temperature of the thermal management system under three operating conditions: heavy load condition, heavy load on-load condition and starting torque change condition.

5. The matching method for the thermal management system of an automatic transmission mine car according to claim 1, characterized in that, The three-dimensional simulation model is established based on the three-dimensional digital model of the mining truck, radiator data fitting, and the vehicle speed and cooling fan speed under three working conditions: heavy load, heavy load on-load, and starting torque change.

6. The matching method for the thermal management system of an automatic transmission mining car according to claim 1, characterized in that, Under heavy-load operating conditions, the heat dissipation of the radiator calculated by the one-dimensional cooling simulation model is compared with the total heat dissipation under heavy-load operating conditions. The radiator outlet water temperature is compared with the engine's allowable temperature. If either of the above two items fails to match, iterative calculation is performed.

7. The matching method for the thermal management system of an automatic transmission mine car according to claim 2, characterized in that, Under heavy load conditions, the heat dissipation of the radiator calculated by the one-dimensional cooling simulation model is compared with the total heat dissipation under heavy load conditions. The radiator outlet water temperature is compared with the engine's allowable temperature. The heat dissipation of the oil cooler is compared with the heat dissipation requirements of the hydraulic retarder during operation. The oil outlet temperature of the oil cooler is compared with the allowable temperature of the hydraulic automatic transmission. If any of the above four items fails to match, iterative calculation is performed.

8. The matching method for the thermal management system of an automatic transmission mine car according to claim 1, characterized in that, Under the starting torque conversion condition, the heat dissipation of the radiator calculated by the one-dimensional cooling simulation model is compared with the total heat dissipation under the starting torque conversion condition. The radiator outlet water temperature is compared with the engine's allowable temperature. The heat dissipation of the oil cooler is compared with the heat dissipation requirements of the hydraulic automatic transmission under the torque conversion condition. The oil cooler outlet oil temperature is compared with the allowable temperature of the hydraulic automatic transmission. If any of the above four items fails to match, iterative calculation is performed.

9. A thermal management system for implementing the matching method of the thermal management system for automatic transmission mining cars according to any one of claims 1-8, characterized in that, include: The system includes a radiator with a cooling fan, an inlet pipe connected to the radiator, a thermostat mounted on the inlet pipe, a secondary outlet connected to an oil cooler, a secondary outlet connected to a radiator outlet pipe, and a water pump connected to the outlet pipe. The thermostat is connected to the water pump. The primary side of the oil cooler is connected to a hydraulic automatic transmission, which is connected to the engine via a drive shaft. The radiator inlet and outlet pipes pass through the engine area. When the thermostat is open, coolant flows sequentially through the radiator. The radiator outlet pipe, water pump, engine, oil cooler secondary side, engine, radiator inlet pipe, and thermostat return to the radiator to form a large circulation loop in the cooling system. When the thermostat is closed, the coolant sequentially passes through the water pump, engine, oil cooler secondary side, engine, and thermostat to form a small circulation loop in the cooling system. The coolant in both the large and small circulation loops of the cooling system passes through the oil cooler secondary side. For the primary side circuit of the oil cooler, the lubricating oil sequentially passes through the hydraulic automatic transmission, oil cooler inlet pipe, and oil cooler primary side, and then returns to the hydraulic automatic transmission through the oil cooler outlet pipe. The lubricating oil in the primary side and the coolant in the secondary side of the oil cooler flow in opposite directions.

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