Loader fan positive and negative rotation heat dissipation control system

Abstract

The utility model discloses a positive and negative rotation heat dissipation control system for a fan of a loading machine, belongs to the field of driving of the fan of the loading machine, and solves the problem that the fan is impacted when the rotating direction of the fan is switched during high-speed rotation in the prior art. The vehicle mainly comprises a vehicle body, a vehicle controller is arranged in the vehicle body, the vehicle controller is connected with a forward and reverse rotation switch, a hydraulic motor and a hydraulic pump, and the hydraulic motor is connected with a cooling fan; the cooling fan is connected with the hydraulic pump at the same time, a fan rotating speed sensor is arranged on the cooling fan, the fan rotating speed sensor is electrically connected to a vehicle controller, and the vehicle controller is connected with a temperature sensor. According to the fan forward and reverse rotation heat dissipation control system, switching of forward rotation and reverse rotation is executed after the vehicle controller comprehensively judges the state of the whole vehicle and switching signals, damage to the system caused by misoperation, high-speed rotation of the fan or reversing when the system breaks down is avoided, and the safety of the system is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of loader fan driving, in particular to a loader fan forward and reverse rotation heat dissipation control system. Background Art

[0002] Loaders are often used in dusty environments such as power plants, coal plants, mining areas, and ports. The vehicle's heat dissipation performance and dust removal effect have a significant impact on the reliability and safety of the vehicle.

[0003] Heavy machinery, such as loaders, generates significant heat due to the intense operation of the engine and hydraulic systems. If not dissipated promptly, this heat can lead to engine overheating, decreased hydraulic oil viscosity, and other issues, impacting the equipment's normal operation and service life. Traditional heat dissipation methods often use constant-speed fans, which cannot adjust cooling efficiency based on actual operating conditions, resulting in energy waste and potentially insufficient cooling. Therefore, a heat dissipation control system that can adjust fan speed and direction based on operating conditions is currently lacking, which is crucial for improving the efficiency and reliability of loaders. Utility Model Content

[0004] The purpose of the utility model is to provide a loader fan forward and reverse heat dissipation control system to solve the problem in the prior art that the fan will be impacted when the fan is switched in rotation direction at high speed.

[0005] The utility model is realized through the following technical solutions:

[0006] A loader fan forward and reverse heat dissipation control system includes a vehicle body, a vehicle controller is arranged in the vehicle body, the vehicle controller is connected to a forward and reverse switch, a hydraulic motor and a hydraulic pump, the forward and reverse control of the fan is realized by connecting the forward and reverse switch, the hydraulic motor and the hydraulic pump through the vehicle controller, and the speed and direction of the fan can be adjusted according to the heat dissipation demand to improve the heat dissipation efficiency; the hydraulic motor is connected to the heat dissipation fan; the heat dissipation fan is also connected to the hydraulic pump, a fan speed sensor is provided on the heat dissipation fan, and the fan speed sensor is electrically connected to the vehicle controller. The electrical connection between the fan speed sensor and the vehicle controller enables the system to monitor the operating status of the fan in real time, ensure that the fan operates within a safe range, and prevent overload or damage. The vehicle controller is connected to a temperature sensor.

[0007] Furthermore, the temperature sensors include a transmission oil temperature sensor, a water temperature sensor, and an intercooler temperature sensor; the transmission oil temperature sensor is fixed to the vehicle's transmission; the water temperature sensor is fixed to the engine water channel; and the intercooler temperature sensor is fixed to the intercooler piping. By installing these temperature sensors, the system can comprehensively monitor the temperature of the engine, transmission, and intake system, providing accurate data support for heat dissipation control.

[0008] Furthermore, the safe reversing speed of the cooling fan is 180 rpm to 350 rpm, thereby avoiding the impact and damage that may be caused by sudden reversing during high-speed operation and improving the safety and stability of system operation.

[0009] Furthermore, the vehicle controller is connected to a dashboard. The connection between the vehicle controller and the dashboard enables the operator to intuitively understand the operating status of the cooling system, making it easier to make adjustments or handle abnormal situations in a timely manner.

[0010] Furthermore, the instrument panel is provided with a buzzer and a fault light.

[0011] Furthermore, an engine controller is provided between the water temperature sensor and the vehicle controller.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The fan forward and reverse cooling control system proposed in this utility model switches between forward and reverse directions based on a comprehensive assessment of the vehicle's status and switch signals by the vehicle controller. This avoids damage to the system caused by misoperation, high-speed fan rotation, or reversing during system failure, significantly improving system safety. This utility model connects the forward and reverse switch, hydraulic motor, and hydraulic pump via the vehicle controller to achieve forward and reverse fan control. The fan's speed and direction can be automatically adjusted based on cooling requirements, improving cooling efficiency.

[0014] 2. The utility model adopts a fan speed sensor. Through real-time monitoring and adjustment of the fan speed, the vehicle can freely switch between heat dissipation and dust removal modes during operation. It can realize intelligent control switching without stopping the machine, greatly improving work efficiency.

[0015] 3. The utility model has a good human-machine interface. When the fan reverses for too long, it can promptly remind the driver to restore the fan to forward rotation, avoiding overheating of the system due to dust removal and waste of heat dissipation energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the principle of the present utility model.

[0018] In the figure: 1. Vehicle controller; 2. Engine controller; 3. Instrument panel; 4. Forward / reverse switch; 5. Transmission oil temperature sensor; 6. Intercooler temperature sensor; 7. Fan speed sensor; 8. Water temperature sensor; 9. Hydraulic motor; 10. Hydraulic pump; 11. Cooling fan. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is a clear and complete description of the technical solution of the present invention in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention of the present invention.

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Example 1: A loader fan forward and reverse heat dissipation control system, such as Figure 1-Figure 2 As shown, it includes a vehicle body, in which a vehicle controller 1 is provided, and the vehicle controller 1 is connected to a forward and reverse switch 4, a hydraulic motor 9 and a hydraulic pump 10. The forward and reverse switch 4, the hydraulic motor 9 and the hydraulic pump 10 are connected through the vehicle controller 1 to realize the forward and reverse control of the fan, and the speed and direction of the fan can be adjusted according to the heat dissipation requirements to improve the heat dissipation efficiency; the hydraulic motor 9 is connected to a cooling fan 11; the cooling fan 11 is also connected to the hydraulic pump 10, and a fan speed sensor 7 is provided on the cooling fan 11, and the fan speed sensor 7 is electrically connected to the vehicle controller 1. The electrical connection between the fan speed sensor 7 and the vehicle controller 1 enables the system to monitor the operating status of the fan in real time to ensure that the fan operates within a safe range to prevent overload or damage. The vehicle controller 1 is connected to a temperature sensor.

[0022] Example 2: A loader fan forward and reverse rotation heat dissipation control system. The temperature sensors include a transmission oil temperature sensor 5, a water temperature sensor 8, and an intercooler temperature sensor 6. The transmission oil temperature sensor 5 is fixed to the transmission of the vehicle; the water temperature sensor 8 is fixed to the engine water channel of the vehicle; and the intercooler temperature sensor 6 is fixed to the intercooler pipe of the vehicle. By installing the transmission oil temperature sensor 5, the water temperature sensor 8, and the intercooler temperature sensor 6, the system can comprehensively monitor the temperature conditions of the engine, transmission system, and intake system, providing accurate data support for heat dissipation control.

[0023] The safe reversing speed of the cooling fan 11 is 180 rpm to 350 rpm, which avoids the impact and damage that may be caused by sudden reversing during high-speed operation, thereby improving the safety and stability of the system operation.

[0024] The vehicle controller 1 is connected to the instrument panel 3. The connection between the vehicle controller 1 and the instrument panel 3 enables the operator to intuitively understand the operating status of the cooling system, making it easier to make adjustments or handle abnormal situations in a timely manner.

[0025] The instrument panel 3 is provided with a buzzer and a fault light. An engine controller 2 is provided between the water temperature sensor 8 and the vehicle controller 1. Other features are the same as those of the first embodiment.

[0026] The vehicle controller 1 is the core control unit for the entire fan forward and reverse cooling control system. It collects signals from the forward and reverse switches 4 to determine whether forward cooling or reverse dust removal is required. It then sends control signals to the hydraulic motor 9 and hydraulic pump 10, which control the output of the cooling fan 11 based on these signals.

[0027] When the vehicle is powered, the vehicle controller 1 monitors the vehicle's status in real time, detecting faults in the cooling system such as sensor short circuit / open circuit, cooling solenoid valve open circuit / short circuit, and temperature alarm point overtemperature. If a system fault occurs, the vehicle controller 1 sends a fault message to the instrument panel 3 via the CAN bus. The instrument panel 3 displays the fault message, lights the corresponding fault light, and sounds an alarm. Simultaneously, the vehicle controller 1 sends forward and full speed commands to the hydraulic motor 9 and hydraulic pump 10, respectively. The hydraulic motor 9 and hydraulic pump 10 receive and execute the commands, causing the cooling fan 11 to operate in the forward cooling direction and at the highest speed (at this point, the speed is not controlled by the real-time temperature value of the temperature sensor), ensuring the cooling requirements of the vehicle. If the system is fault-free, the fan's forward and reverse rotations can operate normally according to the following logic.

[0028] When the forward / reverse switch 4 is not operated (i.e., in the off state), the vehicle controller 1 does not receive a switch reversal signal, and the system is determined to be fault-free, the vehicle controller 1 defaults to outputting a forward signal to the hydraulic motor 9, triggering forward fan rotation. The fan speed is then controlled by the vehicle controller 1 based on three temperature signals: the transmission oil temperature, the intercooler temperature, and the water temperature. The transmission oil temperature, the intercooler temperature, and the engine water temperature are each set to linearly vary with the fan speed, with a starting temperature corresponding to the fan idle speed and a maximum temperature corresponding to the fan maximum speed. The vehicle controller 1 collects temperature signals from the transmission oil temperature sensor 5, the intercooler temperature sensor 6, and the water temperature sensor 8 (sent via the CAN bus by the engine controller 2). When all three temperature values are less than or equal to the starting temperature, the vehicle controller 1 determines the target fan speed to be idle. Conversely, when any of the three temperature values is greater than the starting temperature, the vehicle controller 1 selects the maximum of the speeds corresponding to the three temperatures as the target speed for the cooling fan 11. And output the hydraulic pump 10 solenoid valve control signal according to the linear relationship between the fan speed and the displacement of the hydraulic pump 10 and the displacement of the hydraulic pump 10 and the solenoid valve of the hydraulic pump 10.

[0029] When the driver operates the forward / reverse switch 4, the vehicle controller 1 detects the switch reversal signal and simultaneously checks the signal from the fan speed sensor 7. When the fan speed is within the permissible reversing range set by the vehicle controller 1 (which has a preset minimum fan reversing speed of 180 rpm and a maximum fan reversing speed of 350 rpm), the controller uses logic to determine whether the fan speed is within the preset fan speed range. If so, the controller outputs a reversing signal to control the hydraulic motor 9 to reverse. If the fan speed does not meet the permissible reversing range set by the vehicle controller 1, the controller controls the displacement of the hydraulic pump 10 to reduce or increase the fan speed until the speed condition is met, at which point the controller outputs a reversing signal to reverse the fan. After the controller outputs the reversing signal, the cooling fan 11 gradually stops and then begins reversing. The controller controls the displacement of the hydraulic pump 10 to gradually increase the reversing fan speed from zero to its maximum fan speed, allowing dust removal to occur at the maximum fan speed. The instrument panel 3 displays a reversing prompt. To switch cooling fan 11 from reverse to forward rotation, vehicle controller 1 controls the displacement of hydraulic pump 10 to reduce the fan speed to within the set permissible reversing range and outputs a forward rotation signal to hydraulic motor 9, completing the switch from reverse to forward rotation. The instrument panel's reverse rotation prompt is then removed. Cooling fan 11's speed returns to being controlled by the three temperature signals: transmission oil temperature, intercooler temperature, and water temperature.

[0030] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A loader fan forward and reverse heat dissipation control system, comprising a vehicle body, wherein a vehicle controller (1) is provided in the vehicle body, characterized in that: The vehicle controller (1) is connected to a forward / reverse rotation switch (4), a hydraulic motor (9) and a hydraulic pump (10); the hydraulic motor (9) is connected to a cooling fan (11); the cooling fan (11) is also connected to the hydraulic pump (10); a fan speed sensor (7) is provided on the cooling fan (11); the fan speed sensor (7) is electrically connected to the vehicle controller (1); and the vehicle controller (1) is connected to a temperature sensor.

2. The loader fan forward and reverse heat dissipation control system according to claim 1, characterized in that: The temperature sensors include a transmission oil temperature sensor (5), a water temperature sensor (8) and an intercooler temperature sensor (6); the transmission oil temperature sensor (5) is fixed on the gearbox of the vehicle body; the water temperature sensor (8) is fixed on the engine water channel of the vehicle body; and the intercooler temperature sensor (6) is fixed on the intercooler pipeline of the vehicle body.

3. The loader fan forward and reverse heat dissipation control system according to claim 1, characterized in that: The safe reversing speed of the cooling fan (11) is 180 rpm-350 rpm.

4. The loader fan forward and reverse heat dissipation control system according to claim 1, characterized in that: The vehicle controller (1) is connected to a dashboard (3).

5. The loader fan forward and reverse heat dissipation control system according to claim 4, characterized in that: The instrument panel (3) is provided with a buzzer and a fault light.

6. The loader fan forward and reverse heat dissipation control system according to claim 2, characterized in that: An engine controller (2) is provided between the water temperature sensor (8) and the vehicle controller (1).

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