Mining vehicle heat balance testing device and method and mining vehicle

Abstract

The invention discloses a mining vehicle heat balance testing device and method, and a mining vehicle, and the device comprises a sensor assembly which comprises a rotating speed sensor, a temperature sensor, and an environment temperature sensor; the plurality of rotating speed sensors are respectively and correspondingly mounted at wheel hubs of the mine car to be detected; the plurality of temperature sensors are correspondingly mounted on the surfaces of the wheel edges of the to-be-detected mine car; the environment temperature sensor is installed at a ventilation position of a test area of the test bench. The control assembly comprises a main controller and a data storage module, the main controller is in communication connection with the sensor assembly, the execution assembly, the early warning assembly and the data storage module, and the data storage module is used for storing collected data and control logic parameters; the execution assembly comprises a fan, and the fan is electrically connected with the main controller; and the early warning assembly comprises an alarm module, and the alarm module is electrically connected with the main controller. The dynamic cooling effect is achieved by adjusting the wind speed of the draught fan in real time, so that the tested vehicle is in the heat balance state.

Description

Technical Field

[0001] This invention relates to a thermal balance testing device and method for mining vehicles, and to mining vehicles in the field of testing technology for engineering machinery. Background Technology

[0002] With the technological upgrades in the construction machinery industry and the increasing demands for equipment reliability in mining operations, the overall system matching test of mining vehicles has become a crucial link in ensuring the core competitiveness of products. The mining environment is characterized by complex road conditions, large load fluctuations, and long continuous operating times, placing stringent requirements on the load-bearing capacity, stability, and durability of the power transmission system (including hydraulic systems, gearboxes, drive axles, etc.) of mining vehicles. To proactively identify potential faults and reduce the failure rate during product service, the industry commonly conducts multi-condition simulation tests to verify the overall system matching of mining vehicles, ensuring that the vehicles meet safety, reliability, and service life standards in actual operations.

[0003] However, when mining vehicles undergo multi-condition system matching tests on test benches, the complexity of the test conditions (such as full-load climbing, high-speed driving, and frequent start-stop) forces the vehicle's power transmission system to continuously output high torque and withstand high loads. This leads to a sharp increase in heat generation in the test system (including the test equipment and the vehicle under test). If cooling is not timely and effective, critical components such as hydraulic oil, seals, and bearings will be exposed to high temperatures for extended periods. Currently, the industry commonly uses air cooling (i.e., operating cooling fans at fixed or graded speeds) for cooling, but this method has significant drawbacks: Firstly, frequent switching of operating conditions during testing causes dynamic changes in heat generation. Fans at fixed or graded speeds cannot adaptively adjust their cooling power based on real-time heat generation. When heat generation surges, insufficient cooling power can cause problems such as excessive hydraulic oil temperature, accelerated aging of seals, and decreased lubricant viscosity, directly affecting the accuracy of test results and even damaging the vehicle or test equipment. Secondly, when heat generation is low, continuous high-power operation of the fan results in energy waste and increased fan wear, leading to unnecessary losses.

[0004] Furthermore, existing air-cooling solutions lack a linkage response mechanism for the testing environment (such as seasonal temperature differences) and real-time vehicle operating parameters (such as wheel-side speed and component temperature). They cannot achieve dynamic matching of cooling power based on feedback information between the vehicle under test and the testing equipment, making it difficult for the testing system to maintain a stable thermal equilibrium. Therefore, how to dynamically adjust the speed of the cooling fan based on the real-time operating parameters of the mining vehicle (such as wheel-side speed and component temperature) and environmental conditions, so that the testing system accurately maintains a thermal equilibrium state suitable for the performance of key components throughout the entire testing cycle, avoiding testing risks and equipment damage caused by high temperatures, and eliminating resource waste caused by excessive cooling power, has become a key technical problem urgently needing to be solved in the field of mining vehicle system matching testing. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a thermal balance testing device and method for mining vehicles. The device achieves dynamic cooling by adjusting the fan speed in real time, thereby ensuring that the test vehicle is in a thermal balance state. This avoids adverse consequences such as excessive heat generation in the test vehicle during long-term testing due to untimely cooling, which could lead to increased hydraulic oil temperature, reduced oil life, and aging of sealing gaskets.

[0006] To achieve the above objectives, the present invention employs a thermal balance testing device for mining vehicles, comprising: The sensor assembly includes a speed sensor, a temperature sensor, and an ambient temperature sensor; multiple speed sensors are respectively installed at the wheel hubs of each wheel of the mine car under test for real-time acquisition of wheel speed signals; multiple temperature sensors are respectively installed on the surface of each wheel of the mine car under test for real-time acquisition of wheel temperature signals; the ambient temperature sensor is installed in the ventilation area of ​​the test bench for acquiring the initial and real-time temperature of the test environment. The control component includes a main controller and a data storage module. The main controller is communicatively connected to the sensor component, the execution component, the early warning component, and the data storage module. It is used to receive the acquisition signals from the sensor component, perform logical operations, and output control commands. The data storage module is used to store the acquired data and control logic parameters. The execution component includes a fan, which is electrically connected to the main controller and is used to adjust the speed according to the instructions of the main controller to achieve air-cooling of the mine car under test. The early warning component includes an alarm module, which is electrically connected to the main controller and is used to issue an alarm signal when the parameters collected by the sensor component exceed a preset threshold.

[0007] As an improvement, the temperature sensor is mounted on the surface of the brake drum or drive axle housing on the side of the mine car body to be tested, and is arranged adjacent to the speed sensor on the corresponding wheel side.

[0008] As an improvement, the alarm module includes an audible and visual alarm; when the wheel speed collected by the speed sensor exceeds the preset speed range, or the wheel temperature collected by the temperature sensor exceeds the preset temperature threshold, the audible and visual alarm will issue an audible and visual alarm.

[0009] As an improvement, the mining vehicle is a fuel-powered mining vehicle.

[0010] A second aspect of the present invention also provides a method for thermal balance testing of mining vehicles, based on the aforementioned thermal balance testing device for mining vehicles, comprising the following steps: S1. Fix the mine car under test on the test bench, start the test program, and the main controller controls the speed sensor and ambient temperature sensor to start working. The speed signal of each wheel and the initial temperature signal of the test environment are collected at intervals t1. The actual speed of the mine car under test is calculated and it is determined whether the actual speed is within the preset speed range. S2. The main controller determines the season type of the test environment based on the initial temperature collected by the ambient temperature sensor, and calls the corresponding season's initial fan speed control logic. S3. The main controller controls the fan to start, and it starts to run according to the initial speed formula of the corresponding season. At the same time, it controls the temperature sensors on each wheel to collect the wheel temperature signal at intervals of t2. S4. The main controller receives the wheel-side speed signal from the speed sensor, the wheel-side temperature signal from the temperature sensor, and the real-time ambient temperature signal in real time. Combined with the historical data collected in the data storage module, it continuously optimizes the fan speed adjustment parameters and dynamically adjusts the fan speed to keep the temperature of the mine car under test within the preset temperature range. S5. During the test, if the main controller detects that the wheel speed collected by the speed sensor exceeds the preset speed range, or the wheel temperature collected by the temperature sensor exceeds the preset temperature threshold, it will immediately control the alarm module to issue an alarm signal and adjust the fan speed or trigger a test pause command according to the degree of parameter exceedance.

[0011] As an improvement, the value range of t1 in step S1 is 1~5s, and the value range of t2 in step S3 is 2~10s.

[0012] As an improvement, the criteria for determining the season type in step S2 are as follows: when the initial ambient temperature is ≥30℃, it is determined to be summer; when the initial ambient temperature is ≤10℃, it is determined to be winter; when 10℃ < initial ambient temperature <30℃, it is determined to be normal temperature.

[0013] As an improvement, the initial rotational speed formula in step S3 is specifically as follows: Summer is V 风1 =k1*V 车辆 +V 变量1 Where k1 is the summer speed proportional coefficient, V 车辆 V is the actual speed of the mine car under test, calculated based on signals collected by a speed sensor. 变量1 For summer engine speed adjustment variables; Winter is V 风2 =k2*V 车辆 +V 变量2 Where k2 is the winter speed proportional coefficient, V 变量2 For winter speed adjustment variables, and V in the initial stage of testing 风2=0, when the rotation speed of the mine car under test reaches the maximum value and the wheel edge temperature collected by the temperature sensor reaches the lower limit of the preset reference temperature, the fan starts and operates according to the formula. room temperature is V 风3 =k3*V 车辆 +V 变量3 Where k3 is the proportional coefficient of rotational speed at room temperature, and V 变量3 This is the variable for adjusting the rotational speed at room temperature.

[0014] As an improvement, the continuous optimization of the fan speed adjustment parameters in step S4 specifically includes: The main controller continuously collects data from the wheel-side speed sensor, wheel-side temperature sensor, and ambient temperature over different time periods. When the wheel-side temperature exceeds the upper limit of the preset temperature range, the V value in the corresponding seasonal speed formula is increased. 变量 ; When the wheel edge temperature is lower than the lower limit of the preset temperature range, reduce V in the corresponding seasonal speed formula. 变量 The temperature of the mine car under test will be maintained within the preset temperature range until it stabilizes.

[0015] As an improvement, step S4 also includes: when the cumulative amount of test data reaches a preset threshold, the main controller generates a general adjustment formula for the fan speed of different models of mine cars under test based on the data collected by multiple sets of speed sensors and temperature sensors, and stores it in the data storage module for subsequent thermal balance tests of similar mine cars.

[0016] As an improvement, the allowable fluctuation of the preset temperature range is 1~5℃, and the reference temperature range for adapting to the performance of oils, seals and equipment is 60~80℃.

[0017] As an improvement, the criterion for judging the degree of parameter exceeding the standard in step S5 is as follows: When the wheel edge temperature collected by the temperature sensor exceeds the upper limit of the preset temperature range but does not exceed twice the allowable fluctuation value of the upper limit, only the fan speed is increased; when the wheel edge temperature reaches or exceeds twice the allowable fluctuation value of the upper limit of the preset temperature range, or when the wheel edge speed collected by the speed sensor exceeds the preset range by ±10%, a test pause command is triggered.

[0018] As an improvement, the main controller stores the speed data from the speed sensor, the temperature data from the temperature sensor, the fan speed adjustment records, and alarm information in real time to the data storage module during the test, supporting data export and historical trajectory tracing.

[0019] A third aspect of the present invention also provides a mining vehicle equipped with the aforementioned mining vehicle thermal balance testing device.

[0020] Compared with the prior art, the beneficial effects of the present invention are: (1) By setting speed sensors and temperature sensors on each wheel side of the mine car under test, the speed and temperature signals of each wheel side can be collected in real time and synchronously. Combined with the environmental parameter collection of the ambient temperature sensor, the comprehensive capture of multi-dimensional data can be achieved, avoiding test deviations caused by a single sensor or local data. The main controller dynamically adjusts the fan speed based on the collected data to ensure that the temperature of the mine car is stable within the preset range of the compatible oil, seals and equipment performance. A closed loop is formed from data collection to control execution, which greatly improves the accuracy and reliability of the thermal balance test results and provides accurate data support for the performance evaluation of the mine car.

[0021] (2) This invention uses an ambient temperature sensor to determine the season (summer, winter, normal temperature) of the test environment and calls the corresponding season's initial fan speed formula. It optimizes the speed regulation logic for different seasons based on the ambient temperature characteristics. The initial speed is higher in summer to enhance the cooling effect. In the early winter, the fan is not started to avoid excessive cooling. At normal temperature, the speed is adjusted according to the conventional logic. This invention achieves test adaptation under different climatic conditions and solves the problem of traditional test devices lacking seasonal specificity and having poor cooling / insulation effects. It ensures that the test can be carried out stably in all seasons and multiple environments.

[0022] (3) Set up an audible and visual alarm module. When the wheel speed exceeds the preset range or the temperature exceeds the threshold, an alarm signal will be issued immediately. At the same time, the fan speed will be dynamically adjusted or a test pause command will be triggered according to the degree of exceedance. This can quickly respond to abnormal working conditions and avoid the mine car from malfunctioning due to excessive temperature, such as oil deterioration or seal failure, or damage to the test equipment caused by abnormal speed. This provides double safety protection for the mine car and test bench equipment during the test process.

[0023] (4) The main controller can continuously optimize the fan speed adjustment parameters by combining historical data, and continuously refine the control logic through the temperature-speed dynamic adaptation algorithm. At the same time, it supports the generation of a general speed adjustment formula adapted to different models of mine cars after the cumulative test data reaches the preset threshold. Subsequent tests of similar mine cars can directly call the formula without repeated debugging, which greatly shortens the test cycle and reduces the complexity of operation. The data storage module stores speed, temperature, speed adjustment records and alarm information in real time, supports data export and historical traceability, which facilitates the review and analysis of test data and technical optimization.

[0024] (5) The device consists of sensor components, control components, fan and alarm module. It has a simple structure and is easy to install. It can be directly adapted to the test bench of fuel-powered mining vehicles. The core components all adopt mature industrial-grade parts (such as PLC main controller, frequency converter fan and sound and light alarm). The procurement and maintenance costs are controllable. At the same time, there is no need to make major modifications to the mining vehicle body. It has strong compatibility and is easy to promote and apply in the field of mining machinery testing. Attached Figure Description

[0025] Figure 1 This is a partial structural schematic diagram of the thermal balance testing device for mining vehicles according to the present invention; Figure 2 This is a flowchart of the thermal balance test method for mining vehicles according to the present invention; In the diagram: 1. Fan, 2. Main controller, 3. Speed ​​sensor, 4. Temperature sensor, 5. Mine car under test. Detailed Implementation

[0026] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention. Example 1

[0028] like Figure 1 As shown, a thermal balance testing device for mining vehicles includes a sensor assembly, a control assembly, an execution assembly, and an early warning assembly. Through the coordinated operation of these components, the device achieves precise, intelligent, and safe thermal balance testing of mining vehicles, thereby improving testing reliability and ease of operation. The sensor assembly includes a speed sensor 3, a temperature sensor 4, and an ambient temperature sensor. Multiple speed sensors 3 are installed one-to-one at the wheel hubs of each wheel of the mine car 5 under test, enabling real-time acquisition of speed signals from each wheel to avoid test deviations caused by missing local data. Multiple temperature sensors 4 are installed on the surface of components at each wheel of the mine car 5 under test, synchronously capturing dynamic changes in wheel temperature to ensure comprehensive and timely temperature monitoring. The ambient temperature sensor is installed in the ventilation area of ​​the test bench, accurately acquiring the initial and real-time temperatures of the test environment, providing reliable data support for seasonal adaptability control. The control component includes a main controller 2 and a data storage module. The main controller 2 is communicatively connected to the sensor component, the execution component, the early warning component, and the data storage module. It can quickly receive and process sensor-acquired signals, efficiently execute logical operations, and output control commands. The data storage module is used to store acquired data and control logic parameters, which not only supports historical data tracing and review but also provides a data foundation for continuous optimization of speed regulation parameters. The execution component includes a fan 1, which is electrically connected to the main controller 2. The fan 1 can flexibly and steplessly adjust the speed according to the control command to achieve efficient air cooling of the mine car 5 under test, ensuring that the temperature of the mine car is stable within a reasonable range suitable for the oil, seals and equipment performance, and avoiding the impact of abnormal temperature on the test results or damage to the equipment. The early warning component includes an alarm module, which is electrically connected to the main controller 2. When the parameters collected by the sensor exceed the preset threshold, an alarm signal can be triggered instantly to achieve a rapid response to abnormal operating conditions and reduce the risk of equipment failure.

[0029] In some embodiments, the temperature sensor 4 is mounted on the surface of the brake drum or drive axle housing of the wheel side of the mine car 5 under test, and is arranged adjacent to the speed sensor 3 of the corresponding wheel side, which improves the accuracy of temperature acquisition, reduces signal transmission delay, and further optimizes data synchronization.

[0030] In some embodiments, the alarm module includes an audible and visual alarm; when the wheel rotation speed exceeds a preset range or the temperature exceeds a threshold, the audible and visual alarm simultaneously issues visual and auditory warnings, greatly improving the abnormality identification, making it easier for operators to quickly locate and handle the situation, and reducing the risk of test interruption.

[0031] In some embodiments, the mining vehicle is a fuel-powered mining vehicle, specifically adapted to the testing scenario requirements of fuel-powered mining vehicles, and can be put into use without additional modifications, thereby enhancing the practicality and promotional value of the device. Example 2

[0032] like Figure 2 As shown, a thermal balance testing method for mining vehicles, based on the aforementioned thermal balance testing device, leverages the structural advantages of multi-sensor collaborative data acquisition, intelligent calculation by the main controller, and dynamic speed regulation of the fan to achieve precise testing, adaptive control, and traceable safety in thermal balance testing. The method specifically includes the following steps: S1. Fix the mine car 5 under test on the test bench, start the test program, and the main controller 2 controls the speed sensor 3 and the ambient temperature sensor to start working. The speed signal of each wheel and the initial temperature signal of the test environment are collected at intervals t1. The actual speed of the mine car 5 under test is calculated and it is determined whether the actual speed is within the preset speed range. Based on the structural design of the speed sensor 3 being installed one by one on each wheel, the speed data is ensured to be complete and accurate initial data is provided for subsequent control. The independent acquisition of ambient temperature data lays the data foundation for scene adaptation. S2, the main controller 2 determines the season of the test environment based on the initial temperature collected by the ambient temperature sensor, and calls the initial speed control logic of the fan 1 for the corresponding season; with the help of the environmental data accurately collected by the ambient temperature sensor, it realizes adaptive regulation for different climate scenarios, matches the device's adaptability design for multiple test environments, and improves the test scenario coverage capability. S3. The main controller 2 controls the fan 1 to start, and it starts to run according to the initial speed formula of the corresponding season. At the same time, it controls the temperature sensors 4 on each wheel to collect the wheel temperature signal at intervals t2. Taking advantage of the structural advantage of the adjacent arrangement of the temperature sensor 4 and the corresponding wheel speed sensor 3, the signal transmission delay is reduced, ensuring that temperature acquisition and speed regulation are carried out synchronously, and improving the timeliness of data linkage. S4. The main controller 2 receives the wheel-side speed signal from the speed sensor 3, the wheel-side temperature signal from the temperature sensor 4, and the real-time ambient temperature signal in real time. Combined with the historical data collected in the data storage module, it continuously optimizes the speed adjustment parameters of the fan 1 and dynamically adjusts the speed of the fan 1 to keep the temperature of the mine car 5 under test within the preset temperature range. Relying on the high-speed computing power of the main controller 2 and the communication connection design with each component, it realizes the closed-loop linkage of acquisition, analysis, and control. The adjustable speed structure of the fan 1 ensures that the cooling force is accurately matched to the temperature change of the mine car and avoids the impact of temperature abnormalities on the test accuracy. S5. During the test, if the main controller 2 detects that the wheel speed collected by the speed sensor 3 exceeds the preset speed range, or the wheel temperature collected by the temperature sensor 4 exceeds the preset temperature threshold, it will immediately control the alarm module to issue an alarm signal and adjust the speed of the fan 1 or trigger a test pause command according to the degree of parameter exceedance. With the help of the electrical connection linkage design between the early warning component and the main controller 2, a rapid response to abnormal working conditions can be achieved. The hierarchical control design of the device not only avoids damage to the equipment due to parameter exceedance, but also reduces unnecessary test interruptions and improves test safety and efficiency.

[0033] In some embodiments, the value range of t1 in step S1 is 1~5s, and the value range of t2 in step S3 is 2~10s. This acquisition interval matches the signal acquisition characteristics of the sensor, takes into account both the timeliness and accuracy of data acquisition, and ensures the reliability of the data acquired by the device.

[0034] In some embodiments, the criterion for determining the season type in step S2 is: When the initial ambient temperature is ≥30℃, it is determined to be summer; when the initial ambient temperature is ≤10℃, it is determined to be winter; when 10℃ < initial ambient temperature <30℃, it is determined to be normal temperature. The clear seasonal determination boundary is matched with the scene adaptive control design of the device to improve the test adaptability under different climates.

[0035] In some embodiments, the initial rotational speed formula in step S3 is specifically as follows: Summer is V 风1 =k1*V 车辆 +V 变量1 Where k1 is the summer speed proportional coefficient, V 车辆 V is the actual speed of the mine car 5 under test, calculated based on the signal collected by the speed sensor 3. 变量1 For summer engine speed adjustment variables; Winter is V 风2 =k2*V 车辆 +V 变量2 Where k2 is the winter speed proportional coefficient, V 变量2 For winter speed adjustment variables, and V in the initial stage of testing 风2 =0, when the rotation speed of the mine car 5 under test reaches the maximum value and the wheel edge temperature collected by the temperature sensor 4 reaches the lower limit of the preset reference temperature, the fan 1 starts and operates according to the formula. room temperature is V 风3 =k3*V 车辆 +V 变量3 Where k3 is the proportional coefficient of rotational speed at room temperature, and V 变量3 This is the variable for adjusting the rotational speed at room temperature. The differentiated rotational speed formula matches the adjustable speed structure of fan 1, enabling precise control of the cooling intensity in different seasons and avoiding excessive or insufficient cooling.

[0036] The values ​​of k1, k2, and k3 are adjusted according to the vehicle model. Since the weight and load of different vehicle models are different, they can be temporarily set to 1 in the initial stage of testing, and continuously optimized and adjusted in combination with the real-time feedback data of wheel side temperature during the testing process.

[0037] In some embodiments, the continuous optimization of the fan speed adjustment parameters in step S4 specifically refers to: The main controller 2 continuously collects data on wheel-side speed from the speed sensor 3, wheel-side temperature from the temperature sensor 4, and ambient temperature over different time periods. When the wheel-side temperature exceeds the upper limit of the preset temperature range, the V value in the corresponding seasonal speed formula is increased. 变量 ; When the wheel edge temperature is lower than the lower limit of the preset temperature range, reduce V in the corresponding seasonal speed formula. 变量 The temperature of the mine car 5 under test is kept stable within the preset temperature range until the temperature of the mine car 5 is stable. Relying on the logic operation capability of the main controller 2 and the historical data support of the data storage module, the dynamic optimization of the speed adjustment parameters of the fan 1 is realized. The closed-loop control structure design of the matching device is matched to ensure that the temperature of the mine car is always stable within a reasonable range.

[0038] In some embodiments, step S4 further includes: When the accumulated test data reaches a preset threshold, the main controller 2 generates a universal adjustment formula for the fan 1 speed that is adapted to different models of mine cars 5 based on the data collected by multiple sets of speed sensors 3 and temperature sensors 4. This formula is stored in the data storage module for subsequent thermal balance tests of similar mine cars. By leveraging the large-capacity storage structure of the data storage module, the accumulation and reuse of test data are realized, which significantly shortens the testing and debugging cycle of subsequent similar mine cars and improves the reusability and testing efficiency of the device.

[0039] In some embodiments, the allowable fluctuation of the preset temperature range is 1~5℃, and the reference temperature range for adapting to the performance of oils, seals and equipment is 60~80℃. This temperature range matches the working characteristics of the core components of mining vehicles. The device is designed based on this range to effectively protect the components of the mining vehicle, while ensuring that the test results are consistent with actual operating conditions.

[0040] In some embodiments, the criterion for judging the degree of parameter exceeding the standard in step S5 is: When the wheel edge temperature collected by temperature sensor 4 exceeds the upper limit of the preset temperature range but does not exceed twice the allowable fluctuation value of the upper limit, only the speed of fan 1 is increased; when the wheel edge temperature reaches or exceeds twice the allowable fluctuation value of the upper limit of the preset temperature range, or when the wheel edge speed collected by speed sensor 3 exceeds the preset range by ±10%, a test pause command is triggered; the graded over-limit judgment standard matching device's early warning and execution component linkage design realizes gradient response to abnormal working conditions, taking into account both equipment safety protection and test continuity.

[0041] In some embodiments, the main controller 2 stores the rotational speed data of the speed sensor 3, the temperature data of the temperature sensor 4, the speed adjustment records of the fan 1, and alarm information in real time to the data storage module during the test, supporting data export and historical trajectory tracing; relying on the storage and data interaction design of the data storage module, the traceability of the entire test process data is realized, which facilitates subsequent test review, problem localization and technical optimization, and improves the test analysis capability of the device. Example 3

[0042] A mining vehicle is provided, wherein the mining vehicle is equipped with the aforementioned mining vehicle thermal balance testing device. With the structural advantages of the device, such as precise data acquisition by multiple sensors, intelligent control by the main controller, and early warning protection, the device can monitor the wheel-side speed and temperature status of the vehicle in real time, dynamically adapt to the thermal balance requirements under different working conditions, effectively avoid component damage caused by abnormal temperature, and provide accurate test data support for vehicle performance optimization, thereby significantly improving the operational safety and reliability of the mining vehicle.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A thermal balance testing device for mining vehicles, characterized in that, include: The sensor assembly includes a speed sensor, a temperature sensor, and an ambient temperature sensor; multiple speed sensors are respectively installed at the wheel hubs of each wheel of the mine car under test for real-time acquisition of wheel speed signals; multiple temperature sensors are respectively installed on the surface of each wheel of the mine car under test for real-time acquisition of wheel temperature signals; the ambient temperature sensor is installed in the ventilation area of ​​the test bench for acquiring the initial and real-time temperature of the test environment. The control component includes a main controller and a data storage module. The main controller is communicatively connected to the sensor component, the execution component, the early warning component, and the data storage module. It is used to receive the acquisition signals from the sensor component, perform logical operations, and output control commands. The data storage module is used to store the acquired data and control logic parameters. The execution component includes a fan, which is electrically connected to the main controller and is used to adjust the speed according to the instructions of the main controller to achieve air-cooling of the mine car under test. The early warning component includes an alarm module, which is electrically connected to the main controller and is used to issue an alarm signal when the parameters collected by the sensor component exceed a preset threshold.

2. The thermal balance testing device for mining vehicles according to claim 1, characterized in that, The temperature sensor is installed on the surface of the brake drum or drive axle housing next to the wheel of the mine car being tested, and is arranged adjacent to the speed sensor next to the corresponding wheel.

3. The thermal balance testing device for mining vehicles according to claim 1, characterized in that, The alarm module includes an audible and visual alarm; when the wheel speed collected by the speed sensor exceeds the preset speed range, or the wheel temperature collected by the temperature sensor exceeds the preset temperature threshold, the audible and visual alarm will sound an alarm.

4. A method for thermal balance testing of mining vehicles, characterized in that, The mining vehicle thermal balance testing device according to any one of claims 1-3 includes the following steps: S1. Fix the mine car under test on the test bench, start the test program, and the main controller controls the speed sensor and ambient temperature sensor to start working. The speed signal of each wheel and the initial temperature signal of the test environment are collected at intervals t1. The actual speed of the mine car under test is calculated and it is determined whether the actual speed is within the preset speed range. S2. The main controller determines the season type of the test environment based on the initial temperature collected by the ambient temperature sensor, and calls the corresponding season's initial fan speed control logic. S3. The main controller controls the fan to start, and it starts to run according to the initial speed formula of the corresponding season. At the same time, it controls the temperature sensors on each wheel to collect the wheel temperature signal at intervals of t2. S4. The main controller receives the wheel-side speed signal from the speed sensor, the wheel-side temperature signal from the temperature sensor, and the real-time ambient temperature signal in real time. Combined with the historical data collected in the data storage module, it continuously optimizes the fan speed adjustment parameters and dynamically adjusts the fan speed to keep the temperature of the mine car under test within the preset temperature range. S5. During the test, if the main controller detects that the wheel speed collected by the speed sensor exceeds the preset speed range, or the wheel temperature collected by the temperature sensor exceeds the preset temperature threshold, it will immediately control the alarm module to issue an alarm signal and adjust the fan speed or trigger a test pause command according to the degree of parameter exceedance.

5. The method for thermal balance testing of mining vehicles according to claim 4, characterized in that, The value range of t1 in step S1 is 1~5s, and the value range of t2 in step S3 is 2~10s.

6. The method for thermal balance testing of mining vehicles according to claim 4, characterized in that, The criteria for determining the season type in step S2 are as follows: when the initial ambient temperature is ≥30℃, it is determined to be summer; when the initial ambient temperature is ≤10℃, it is determined to be winter; when 10℃ < initial ambient temperature <30℃, it is determined to be normal temperature.

7. The method for thermal balance testing of mining vehicles according to claim 4, characterized in that, The initial rotational speed formula mentioned in step S3 is as follows: Summer is V 风1 =k1*V 车辆 +V 变量1 Where k1 is the summer speed proportional coefficient, V 车辆 V is the actual speed of the mine car under test, calculated based on signals collected by a speed sensor. 变量1 For summer engine speed adjustment variables; Winter is V 风2 =k2*V 车辆 +V 变量2 Where k2 is the winter speed proportional coefficient, V 变量2 For winter speed adjustment variables, and V in the initial stage of testing 风2 =0, when the rotation speed of the mine car under test reaches the maximum value and the wheel edge temperature collected by the temperature sensor reaches the lower limit of the preset reference temperature, the fan starts and operates according to the formula. room temperature is V 风3 =k3*V 车辆 +V 变量3 Where k3 is the proportional coefficient of rotational speed at room temperature, and V 变量3 This is the variable for adjusting the rotational speed at room temperature.

8. The method for thermal balance testing of mining vehicles according to claim 4, characterized in that, The continuous optimization of the fan speed adjustment parameters in step S4 specifically includes: The main controller continuously collects data from the wheel-side speed sensor, wheel-side temperature sensor, and ambient temperature over different time periods. When the wheel-side temperature exceeds the upper limit of the preset temperature range, the V value in the corresponding seasonal speed formula is increased. 变量 ; When the wheel edge temperature is lower than the lower limit of the preset temperature range, reduce V in the corresponding seasonal speed formula. 变量 The temperature of the mine car under test will be maintained within the preset temperature range until it stabilizes.

9. A method for thermal balance testing of mining vehicles according to claim 4, characterized in that, Step S4 also includes: when the cumulative amount of test data reaches a preset threshold, the main controller generates a general adjustment formula for the fan speed of different models of mine cars under test based on the data collected by multiple sets of speed sensors and temperature sensors, and stores it in the data storage module for subsequent thermal balance tests of similar mine cars.

10. A method for thermal balance testing of mining vehicles according to claim 4, characterized in that, The allowable fluctuation of the preset temperature range is 1~5℃, and the reference temperature range for adapting to the performance of oils, seals and equipment is 60~80℃.

11. A method for thermal balance testing of mining vehicles according to claim 4, characterized in that, The criteria for judging the degree of parameter exceeding the standard in step S5 are as follows: When the wheel edge temperature collected by the temperature sensor exceeds the upper limit of the preset temperature range but does not exceed twice the allowable fluctuation value of the upper limit, only the fan speed is increased; when the wheel edge temperature reaches or exceeds twice the allowable fluctuation value of the upper limit of the preset temperature range, or when the wheel edge speed collected by the speed sensor exceeds the preset range by ±10%, a test pause command is triggered.

12. A mining vehicle, characterized in that, The mining vehicle is equipped with a mining vehicle thermal balance testing device as described in any one of claims 1-3.

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