Automatic dust cleaning and temperature monitoring and early warning system for combine harvester gearbox

Abstract

The present application relates to the technical field of agricultural machinery, and discloses a combined harvester gearbox automatic ash removal and temperature monitoring and early warning system, which comprises an automatic ash removal subsystem, a temperature monitoring and early warning subsystem, a central control unit and an early warning module. The automatic ash removal subsystem is connected with the gas reservoir of the combined harvester and performs a blowing action on the gearbox area. The temperature monitoring and early warning subsystem collects temperature data and transmits the data to the central control unit. The central control unit is provided with timing ash removal control logic and temperature adaptive control logic. The central control unit dynamically adjusts the blowing frequency of the automatic ash removal subsystem and the operating speed of the cooling fan according to the temperature data. The central control unit is configured with multi-stage early warning intervention logic, which triggers sound and light alarms, forced speed reduction and power cut actions respectively when facing different abnormal temperature rise conditions. The present application realizes adaptive intervention of the gearbox under hot working conditions, avoids wire harness ablation failure and improves the overall machine operation safety.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to an automatic dust removal and temperature monitoring and early warning system for the gearbox of a combine harvester. Background Technology

[0002] When a combine harvester is harvesting crops, debris such as straw, soil, and crop juice in the working environment can easily accumulate above and around the gearbox. The covering layer formed by these debris on the surface of the gearbox housing will seriously hinder heat dissipation, causing the housing temperature to rise continuously. Being in a high-temperature environment for a long time can easily lead to serious machine failures such as wiring harness aging, insulation melting, or even short circuit burning.

[0003] To solve the problem of dust accumulation, existing active dust removal solutions usually require the addition of an independent air source power device. This increases the overall structural redundancy of the harvester and results in high installation costs. At the same time, existing dust removal equipment mostly uses continuous strong airflow for sweeping. This method is difficult to effectively break up the already compacted dense dust layer, and the continuous high-pressure airflow can easily cause impact damage to the precision components and pipelines around the gearbox.

[0004] In terms of equipment thermal management, existing dust removal operations are mostly performed at fixed time intervals or rely on manual triggering by the driver. The system cannot dynamically adjust the frequency of dust removal operations according to the actual temperature fluctuation of the transmission. This non-adaptive control method results in insufficient dust removal force under high load conditions, which cannot work in conjunction with the cooling fan to suppress the temperature rise trend in time, making it difficult to maintain the stability of the transmission's thermal conditions.

[0005] Current combine harvesters lack a progressive hardware safety intervention mechanism when faced with abnormal temperature rise in the gearbox. When dust accumulation or heat dissipation failure causes the temperature to approach the dangerous critical value, the system can only provide basic audible and visual warnings. It cannot automatically perform protective actions such as forcibly reducing the load on the whole machine or cutting off the core power source before the fault worsens. This passive protection mode means that the equipment still faces a very high risk of component damage and safety accidents under extreme working conditions. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automatic dust removal and temperature monitoring and early warning system for combine harvester gearboxes, solving the technical problem that existing combine harvesters experience wire harness burning failures due to the accumulation of debris on the gearbox surface during operation, which obstructs heat dissipation.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an automatic dust removal and temperature monitoring and early warning system for the gearbox of a combine harvester, including an automatic dust removal subsystem, a temperature monitoring and early warning subsystem, a central control unit, and an early warning module; The central control unit is electrically connected to the automatic dust removal subsystem, the temperature monitoring and early warning subsystem, and the early warning module, respectively. The temperature monitoring and early warning subsystem is equipped with a receiver, which is built based on the principle of a single-chip microcomputer. The air intake end of the automatic dust removal subsystem is configured to connect to the air storage tank of the combine harvester, and the blowing execution end of the automatic dust removal subsystem is located in the area above and around the gearbox. The temperature monitoring and early warning subsystem is equipped with a wireless temperature sensor, which is placed on the surface of the gearbox housing and the wiring harness. The wireless temperature sensor sends temperature data to the receiver, and the receiver transmits the temperature data to the central control unit. The early warning module is located in the cab of the combine harvester, and its input receives drive signals sent by the central control unit.

[0008] In a preferred embodiment of the present invention, the automatic dust removal subsystem includes a main air pipe, a pressure regulating valve, a solenoid valve assembly, an oil-resistant and pressure-resistant hose, and multiple sets of fan-shaped nozzles. The air inlet of the main air pipe is connected to the air storage tank of the combine harvester, and the air outlet of the main air pipe is connected to the air inlet of the pressure regulating valve. The air outlet of the pressure regulating valve is connected to the air inlet of the solenoid valve assembly via the oil-resistant and pressure-resistant hose. The oil-resistant and pressure-resistant hose is fixed along the frame of the combine harvester and extends to the gearbox area. The air outlet of the solenoid valve assembly is connected to multiple sets of fan-shaped nozzles. The multiple sets of fan-shaped nozzles constitute the purging execution end, and are arranged in the upper area, surrounding area, wiring harness interface area, and heat dissipation fin area of ​​the gearbox. The areas on the surface of the gearbox housing prone to dust accumulation are coated with a hydrophobic and oleophobic coating. The warning module includes a display screen, a buzzer, and indicator lights. The wireless temperature sensor is installed on the surface of the gearbox housing and the wiring harness via a screw fixing structure or an adhesive adhesive structure.

[0009] In another preferred embodiment of the present invention, the central control unit is equipped with timed dust removal control logic and temperature adaptive control logic. When the combine harvester operates continuously for a preset time, the central control unit triggers the opening of the solenoid valve group. The central control unit drives multiple sets of fan-shaped nozzles to perform a single purging. After the single purging is completed, the solenoid valve group automatically closes. During the single purging, the central control unit sends a pulse control signal to the solenoid valve group. The solenoid valve group receives the pulse control signal and performs pulse opening and closing actions.

[0010] In another preferred embodiment of the present invention, the central control unit compares the temperature data with an internally set first temperature threshold; when the temperature data is less than or equal to the first temperature threshold, the central control unit controls the automatic dust removal subsystem to automatically perform a single purging at a first cycle frequency.

[0011] In another preferred embodiment of the present invention, the central control unit is internally set with a second temperature threshold, which is greater than the first temperature threshold. When the temperature data is greater than the first temperature threshold and less than or equal to the second temperature threshold, the central control unit controls the automatic dust removal subsystem to automatically perform a single purging at a second cycle frequency, which is greater than the first cycle frequency. The central control unit outputs a half-speed operation command to the cooling fan of the combine harvester.

[0012] In another preferred embodiment of the present invention, when the temperature data is greater than the second temperature threshold, the central control unit outputs a continuous conduction command to the solenoid valve group to perform continuous purging, the central control unit simultaneously outputs a full-speed operation command to the cooling fan, and the central control unit sends an alarm signal to the early warning module to trigger an audible and visual alarm action.

[0013] In another preferred embodiment of the present invention, the central control unit is configured with early warning intervention logic; when the temperature data reaches the second-level early warning threshold, the central control unit sends a forced speed reduction command to the control bus of the combine harvester, and the central control unit pushes the early warning data message to the background management system; when the temperature data reaches the third-level early warning threshold, the central control unit sends a power cut-off command to the power transmission system of the combine harvester.

[0014] This invention provides an automatic dust removal and temperature monitoring and early warning system for the gearbox of a combine harvester. It has the following beneficial effects: 1. This invention connects the air inlet of the automatic dust removal subsystem to the original air storage tank of the combine harvester. The central control unit drives the solenoid valve group and the fan-shaped nozzle to perform the purging action, avoiding the structural redundancy and modification costs caused by adding an external independent air source. During a single purging, the system uses a pulse control signal to control the opening and closing of the solenoid valve group. It uses discontinuous airflow to impact and destroy the physical structure of the dust accumulated on the surface of the gearbox, achieving active cleaning while preventing continuous strong airflow from causing impact damage to internal components.

[0015] 2. This invention establishes a temperature adaptive control logic. The central control unit compares the real-time temperature data collected by the wireless temperature sensor with the preset temperature threshold and dynamically adjusts the blowing cycle frequency of the automatic dust removal subsystem. When the gearbox temperature rises, the system synchronously outputs half-speed or full-speed operation commands to the cooling fan of the combine harvester. Through the linkage between the dust removal frequency regulation and the cooling fan speed, precise intervention in the thermal condition of the gearbox is achieved and its heat dissipation stability is ensured.

[0016] 3. The present invention is equipped with a progressive early warning intervention logic. When the monitored temperature reaches different levels of early warning thresholds, the central control unit sequentially sends audible and visual alarm signals, forced speed reduction commands, and power cut-off commands to the corresponding modules of the combine harvester. This multi-level hardware intervention mechanism can forcibly reduce the load of the whole machine or cut off the power source before the gearbox faces severe overheating conditions, effectively avoiding faults such as wiring harness burning or gearbox damage, and improving the operating safety of the combine harvester under high load conditions. Attached Figure Description

[0017] Figure 1 This is a system architecture diagram of the present invention. Detailed Implementation

[0018] The technical solutions in 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 embodiments of the present invention, and not all embodiments. 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.

[0019] Please see Figure 1 This invention provides an automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox, including an automatic dust removal subsystem, a temperature monitoring and early warning subsystem, a central control unit, and an early warning module.

[0020] The central control unit is electrically connected to the automatic dust removal subsystem, the temperature monitoring and early warning subsystem, and the early warning module to achieve communication. The temperature monitoring and early warning subsystem is equipped with a receiver, and both the receiver and the central control unit are built based on the microcontroller principle.

[0021] The air intake of the automatic dust removal subsystem is connected to the air storage tank of the combine harvester, and the blowing execution end of the automatic dust removal subsystem is located in the area above and around the gearbox.

[0022] The temperature monitoring and early warning subsystem is equipped with a wireless temperature sensor, which is installed on the surface of the gearbox housing and the wiring harness. The wireless temperature sensor sends temperature data to the receiver via high-frequency modulation, and the receiver transmits the received temperature data to the central control unit.

[0023] The warning module is located in the cab of the combine harvester. The input of the warning module receives the drive signal sent by the central control unit, and the warning module includes a display screen, a buzzer and indicator lights.

[0024] The combine harvester gearbox automatic dust removal and temperature monitoring and early warning system executes the operation process through the central control unit. After the combine harvester starts, the combine harvester gearbox automatic dust removal and temperature monitoring and early warning system executes the initialization program and reads the temperature data collected by the temperature monitoring and early warning subsystem in real time.

[0025] The central control unit is equipped with timed dust removal control logic and temperature adaptive control logic. When the combine harvester has been operating continuously for 2 hours, the central control unit triggers the solenoid valve of the automatic dust removal subsystem to open, driving the purging actuator to perform a single purging. The duration of a single purging is 30 seconds, and the solenoid valve automatically closes after the single purging is completed.

[0026] The temperature sensor is continuously collecting data. The central control unit compares the received real-time temperature data with the internally set temperature threshold and triggers corresponding warning and dust removal actions based on the temperature range.

[0027] When the monitored temperature is less than or equal to 80℃, the central control unit controls the automatic dust removal subsystem to automatically perform a single purging cycle every 2 hours, and the duration of a single purging cycle is 10 seconds.

[0028] When the monitored temperature is greater than 80℃ and less than or equal to 100℃, the central control unit changes the control command, and the blowing interval of the automatic dust removal subsystem is shortened to 1 hour. At the same time, the central control unit outputs a half-speed operation command to the cooling fan of the combine harvester.

[0029] When the monitored temperature exceeds 100℃, the central control unit outputs a command to the automatic dust removal subsystem to keep the solenoid valve open for continuous purging. Simultaneously, the central control unit outputs a command to the cooling fan to run at full speed and sends an alarm signal to the warning module in the cab, triggering the buzzer and indicator light to perform an audible and visual alarm.

[0030] During the execution of the above workflow, the driver can view the real-time updated temperature curve and dust removal record data through the display screen in the warning module, and the driver can also input control commands through the human-machine interface to trigger the automatic dust removal subsystem to perform manual dust removal operations.

[0031] After the combine harvester completes its operation, the central control unit transmits and uploads the temperature data and dust removal operation records generated during the equipment operation to the background management system. The background management system then generates a corresponding operation report for querying.

[0032] The automatic dust removal subsystem includes a main air pipe, a pressure regulating valve, a solenoid valve assembly, an oil-resistant and pressure-resistant hose, and a fan-shaped nozzle.

[0033] The air inlet of the main air pipe is connected to the air storage tank of the combine harvester, and the air outlet of the main air pipe is connected to the air inlet of the pressure regulating valve. The pressure regulating valve is used to stabilize the airflow pressure inside the pipeline.

[0034] The outlet of the pressure regulating valve is connected to the inlet of the solenoid valve assembly via an oil-resistant and pressure-resistant hose. Quick-connect fittings are used at the pipe connections between the main air pipe and the oil-resistant and pressure-resistant hose.

[0035] Oil-resistant and pressure-resistant hoses are fixed along the frame of the combine harvester and extend to the gearbox area. The air outlet of the solenoid valve assembly is connected to multiple sets of fan-shaped nozzles.

[0036] Multiple sets of fan-shaped nozzles are respectively arranged in the area above the gearbox, the wiring harness interface area, and the heat dissipation fin area. The fan-shaped nozzles are equipped with an angle adjustment structure to adapt to the machine structure of the combine harvester.

[0037] The surface of the gearbox housing, which is prone to dust accumulation, is coated with a hydrophobic and oleophobic coating. This coating is used to reduce the adhesion of straw debris and mud to the surface of the gearbox housing and to reduce the frequency of dust removal.

[0038] The temperature monitoring and early warning subsystem includes a wireless temperature sensor and a receiver.

[0039] The wireless temperature sensor is placed in the gearbox housing and wiring harness connector of the combine harvester. The wireless temperature sensor is installed on the surface of the gearbox housing and wiring harness connector by screw fixing or adhesive bonding. The screw or adhesive structure ensures that the wireless temperature sensor fits tightly with the mounting surface.

[0040] The wireless temperature sensor establishes a wireless communication connection with a receiver built on the principle of a single-chip microcomputer. The wireless temperature sensor transmits the collected temperature data to the receiver in real time through high-frequency modulation. The receiver is fixedly placed near the cab of the combine harvester.

[0041] The receiver establishes a communication connection with the central control unit via the CAN bus. The warning module is located inside the driver's cab and is electrically connected to the central control unit. The warning module includes a display screen, a buzzer, and indicator lights.

[0042] The central control unit parses the temperature data transmitted by the receiver, sends a drive signal to the warning module based on the temperature data, the display screen receives the drive signal and displays the temperature value, and the buzzer and indicator light receive the drive signal and execute audible and visual prompts.

[0043] After the combine harvester is started, the automatic dust removal and temperature monitoring and early warning system of the combine harvester gearbox executes the initialization program, and the central control unit reads the temperature data collected by the temperature sensor in real time.

[0044] After the combine harvester has been operating continuously for 2 hours, the central control unit triggers the timed dust removal control logic. The central control unit controls the solenoid valve to open and drives the fan-shaped nozzle to perform a purging operation. The duration of the purging operation is set to 30 seconds. After the purging operation is completed, the solenoid valve automatically closes.

[0045] The central control unit sends pulse control signals to the solenoid valve. The solenoid valve receives the pulse control signals and performs pulse opening and closing actions. The pulse opening and closing actions are used to prevent continuous airflow from impacting the internal components of the combine harvester.

[0046] The central control unit determines the threshold range of the temperature data in real time. When the temperature data collected by the temperature sensor is less than or equal to 80°C, the central control unit controls the automatic dust removal subsystem to perform automatic purging operation at a cycle frequency of 2 hours, and the duration of each automatic purging operation is set to 10 seconds.

[0047] When the temperature data collected by the temperature sensor is greater than 80℃ and less than or equal to 100℃, the central control unit shortens the purging interval, and the automatic purging operation frequency of the automatic dust removal subsystem is changed to once per hour. The central control unit simultaneously outputs control commands to the cooling fan of the combine harvester, and the cooling fan receives the control commands and performs half-speed operation.

[0048] When the temperature data collected by the temperature sensor is greater than 100℃, the central control unit outputs a continuous conduction command to the solenoid valve. The automatic dust removal subsystem responds to the continuous conduction command and performs a continuous purging operation. The central control unit outputs a control command to the cooling fan. The cooling fan receives the control command and performs a full-speed operation. The central control unit simultaneously triggers the early warning module to perform an audible and visual alarm.

[0049] The driver inputs a manual trigger command through the display screen inside the cab. The central control unit receives the manual trigger command and controls the solenoid valve to open. The automatic dust removal subsystem responds to the manual trigger command and performs the manual dust removal operation.

[0050] The central control unit is equipped with early warning and intervention logic, which is used to handle abnormal temperature conditions.

[0051] The central control unit analyzes the temperature data uploaded by the temperature monitoring and early warning subsystem in real time. When the temperature data triggers the first-level early warning threshold, the central control unit sends a first-level early warning signal to the early warning module. The buzzer and indicator light of the early warning module receive the first-level early warning signal and execute the audible and visual prompts, prompting the driver to stop the operation and clean up the accumulated dust.

[0052] When the temperature data triggers the secondary warning threshold, the central control unit sends a forced speed reduction command to the control bus of the combine harvester. The combine harvester receives the forced speed reduction command and executes the speed reduction action. At the same time, the central control unit generates a warning data message and pushes the warning data message to the background management system. The background management system receives the warning data message and issues a notification instruction to the maintenance personnel.

[0053] When the temperature data triggers the level 3 warning threshold, the central control unit sends a power cut-off command to the combine harvester's power transmission system. The combine harvester receives the power cut-off command and cuts off part of the power output. The power cut-off action is used to prevent the wiring harness from burning out.

[0054] The central control unit performs the entire lifecycle management process for operational data.

[0055] During combine harvester operation, the central control unit continuously records the temperature data collected by the temperature monitoring and early warning subsystem and the dust removal operation records of the automatic dust removal subsystem, and stores the temperature data and dust removal operation records in the internal memory. The internal memory supports backtracking and querying of historical operation data.

[0056] The driver can access and view the temperature curves and ash removal records stored in the internal memory through the display screen inside the cab. After the combine harvester completes the operation process, the central control unit automatically uploads the temperature data and ash removal operation records to the background management system.

[0057] The back-end management system receives temperature data and dust removal operation records and generates operation reports. It also aggregates operation reports from multiple combine harvesters to perform remote monitoring operations and support fleet management functions.

[0058] The back-end management system extracts work record data to perform fault analysis and formulate maintenance plans, thereby realizing full life cycle management and predictive maintenance of combine harvesters based on the data traceability mechanism.

[0059] The automatic dust removal and temperature monitoring and early warning system for combine harvester gearboxes follows the engineering installation process and daily operation and maintenance process.

[0060] The installers connected the air inlet of the main air pipe to the air storage tank of the combine harvester. The main air pipe was then connected in series with the pressure regulating valve and the solenoid valve group. The oil-resistant and pressure-resistant hose was fixed along the frame of the combine harvester and extended to the gearbox area. Multiple sets of fan-shaped nozzles were arranged in the gearbox area, and the installers manually adjusted the spray angle of the fan-shaped nozzles.

[0061] The installers used screws or adhesive to attach the wireless temperature sensor to the surface of the gearbox housing and the wiring harness connector. The receiver was fixed in an adjacent area outside the combine harvester's cab. The receiver was then electrically connected to the central control unit and the early warning module to complete the overall system wiring debugging.

[0062] During system operation, maintenance personnel regularly check the sealing status of each pipeline connection in the automatic dust removal subsystem to prevent gas leakage. In addition, maintenance personnel clean the blockages inside the fan-shaped nozzles quarterly. The sealing status check and blockage cleaning operations are used to ensure the normal operation of the purging function of the automatic dust removal subsystem.

[0063] Maintenance personnel replace the power supply battery inside the wireless temperature sensor on an annual cycle. They also calibrate the temperature acquisition accuracy of the wireless temperature sensor. In addition, they import updated firmware into the central control unit to upgrade the timed dust cleaning control logic and temperature adaptive control logic within the central control unit.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic dust removal and temperature monitoring and early warning system for the gearbox of a combine harvester, characterized in that, It includes an automatic dust removal subsystem, a temperature monitoring and early warning subsystem, a central control unit, and an early warning module; The central control unit is electrically connected to the automatic dust removal subsystem, the temperature monitoring and early warning subsystem, and the early warning module, respectively; the temperature monitoring and early warning subsystem is equipped with a receiver, which is built based on the single-chip microcomputer principle; The air intake end of the automatic dust removal subsystem is configured to be connected to the air storage tank of the combine harvester, and the blowing execution end of the automatic dust removal subsystem is located in the upper area and surrounding area of ​​the gearbox. The temperature monitoring and early warning subsystem is equipped with a wireless temperature sensor, which is installed on the surface of the gearbox housing and the surface of the wiring harness. The wireless temperature sensor sends temperature data to the receiver, and the receiver transmits the temperature data to the central control unit. The early warning module is installed in the cab of the combine harvester, and its input terminal receives the drive signal sent by the central control unit.

2. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 1, characterized in that, The automatic dust removal subsystem includes a main air pipe, a pressure regulating valve, a solenoid valve group, an oil-resistant and pressure-resistant hose, and multiple sets of fan-shaped nozzles. The air inlet of the main air pipe is connected to the air storage tank of the combine harvester, and the air outlet of the main air pipe is connected to the air inlet of the pressure regulating valve. The outlet of the pressure regulating valve is connected to the inlet of the solenoid valve assembly via the oil-resistant and pressure-resistant hose. The oil-resistant and pressure-resistant hose is fixed along the frame of the combine harvester and extends to the gearbox area; the air outlet of the solenoid valve group is connected to the multiple sets of fan-shaped nozzles. The multiple sets of fan-shaped nozzles constitute the purging execution end, and the multiple sets of fan-shaped nozzles are arranged in the upper area, the surrounding area, the wiring harness interface area, and the heat dissipation fin area of ​​the gearbox.

3. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 1, characterized in that, The areas on the surface of the gearbox housing that are prone to dust accumulation are coated with a hydrophobic and oleophobic coating.

4. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 1, characterized in that, The early warning module includes a display screen, a buzzer, and indicator lights; The wireless temperature sensor is mounted on the surface of the gearbox housing and the wiring harness using a screw-fixed structure or an adhesive-backed structure.

5. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 2, characterized in that, The central control unit is equipped with timed dust removal control logic and temperature adaptive control logic. When the combine harvester has been operating continuously for a preset time, the central control unit triggers the opening of the solenoid valve group, and the central control unit drives the multiple sets of fan-shaped nozzles to perform a single purging. After the single purging is completed, the solenoid valve group automatically closes.

6. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 5, characterized in that, The central control unit compares the temperature data with an internally set first temperature threshold. When the temperature data is less than or equal to the first temperature threshold, the central control unit controls the automatic dust removal subsystem to automatically perform the single purging at a first cycle frequency.

7. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 6, characterized in that, The central control unit is internally set with a second temperature threshold, which is greater than the first temperature threshold. When the temperature data is greater than the first temperature threshold and less than or equal to the second temperature threshold, the central control unit controls the automatic dust removal subsystem to automatically perform the single purging at a second cycle frequency, where the second cycle frequency is greater than the first cycle frequency, and the central control unit outputs a half-speed operation command to the cooling fan of the combine harvester.

8. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 7, characterized in that, When the temperature data exceeds the second temperature threshold, the central control unit outputs a continuous conduction command to the solenoid valve group to perform continuous purging. Simultaneously, the central control unit outputs a full-speed operation command to the cooling fan. The central control unit sends an alarm signal to the early warning module to trigger an audible and visual alarm.

9. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 5, characterized in that, During a single purging operation, the central control unit sends a pulse control signal to the solenoid valve group, and the solenoid valve group receives the pulse control signal and performs pulse opening and closing actions.

10. The automatic dust removal and temperature monitoring and early warning system for a combine harvester gearbox according to claim 1, characterized in that, The central control unit is equipped with early warning and intervention logic. When the temperature data reaches the level 2 warning threshold, the central control unit sends a forced speed reduction command to the control bus of the combine harvester, and the central control unit pushes the warning data message to the background management system. When the temperature data reaches the level 3 warning threshold, the central control unit sends a power cut-off command to the power transmission system of the combine harvester.

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