Heat dissipation system, heat dissipation method, and working machine

Abstract

This invention relates to the field of engineering machinery technology, providing a heat dissipation system, a heat dissipation method, and operating machinery. The heat dissipation system includes a water radiator, an oil radiator, a cooling fan, and a drive unit. The water radiator is used to cool the engine coolant; the oil radiator is used to cool the hydraulic oil. The cooling surfaces of the water radiator and the oil radiator are angled together. The cooling fan provides airflow to both the water radiator and the oil radiator, and is capable of oscillating back and forth around a reference axis parallel to both cooling surfaces. The drive unit is configured to drive the cooling fan to oscillate around the reference axis. This configuration solves the problem in existing technologies where a single cooling fan cannot simultaneously meet the cooling needs of both the water radiator and the oil radiator.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a heat dissipation system, heat dissipation method and operating machinery. Background Technology

[0002] With the diversified application and development of construction machinery, the structure of construction machinery is becoming more refined, user-friendly, and convenient for operation and maintenance. For example, taking excavators as an example, during the current operation of excavators, the engine and hydraulic system generate a lot of heat, which needs to be dissipated through water radiators and oil radiators to ensure that all components are within the allowable operating temperature range.

[0003] In existing technologies, water radiators and oil radiators are typically installed side-by-side, with the same cooling fan directed at both radiators simultaneously. The fan can provide airflow to both radiators at the same time, and the airflow distribution ratio between them remains constant. However, excavator applications involve diverse and complex operating conditions. The cooling requirements of the water radiator and oil radiator vary depending on the working time and conditions. When controlling the fan speed to meet the higher cooling demand, the lower demand may experience insufficient or excessive cooling.

[0004] Therefore, how to solve the problem that the existing technology cannot simultaneously meet the cooling needs of both water radiators and oil radiators when using the same cooling fan to cool them has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a heat dissipation system, a heat dissipation method, and a working machine to solve the defect in the prior art where the same cooling fan cannot simultaneously meet the heat dissipation needs of both water radiators and oil radiators when used to dissipate heat from both.

[0006] This invention provides a heat dissipation system, comprising:

[0007] A water radiator is used to dissipate heat and cool the engine coolant.

[0008] An oil radiator is used to dissipate heat and cool hydraulic oil, wherein the heat dissipation surface of the water radiator and the heat dissipation surface of the oil radiator are set at an angle;

[0009] A cooling fan is capable of providing airflow to the heat dissipation surfaces of the water radiator and the oil radiator. The cooling fan is capable of oscillating back and forth around a reference axis, which is parallel to the heat dissipation surfaces of the water radiator and the oil radiator.

[0010] The drive unit is configured to drive the cooling fan to oscillate around the reference axis.

[0011] According to a heat dissipation system provided by the present invention, the heat dissipation fan includes:

[0012] The mounting base is rotatable relative to the water radiator and the oil radiator, the rotation axis of the mounting base coincides with the reference axis, and the driving device is configured to drive the mounting base to rotate.

[0013] The rotating blade includes a blade portion for providing airflow and a shaft portion connected to the blade portion, the shaft portion being rotatably connected to the mounting base;

[0014] The shaft is connected to the output shaft of the engine via a transmission mechanism, or the cooling fan may further include a drive component capable of driving the shaft to rotate relative to the mounting base.

[0015] According to a heat dissipation system provided by the present invention, the transmission mechanism includes at least:

[0016] A universal joint is provided between the shaft and the output shaft of the engine.

[0017] According to a heat dissipation system provided by the present invention, the driving device includes:

[0018] A drive cylinder, the axis of which is perpendicular to the reference axis and there is a gap between the drive cylinder and the reference axis, the first end of which is rotatably connected to the mounting base, the second end of which is rotatably connected to the engine, and the rotation axis of the drive cylinder relative to the mounting base and the rotation axis of the drive cylinder relative to the engine are both parallel to the reference axis.

[0019] A heat dissipation system according to the present invention further includes:

[0020] A protective cover is provided around the periphery of the blade portion. The first end of the protective cover is sealed and connected to the oil radiator and the water radiator. The second end of the protective cover is open and fixedly connected to the mounting base.

[0021] According to a heat dissipation system provided by the present invention, the shield includes:

[0022] The rigid body is a cylindrical structure with openings at both ends. The rigid body is sleeved on the outside of the blade part. The end of the rigid body away from the oil radiator and the water radiator is connected to the mounting base through a connecting rod.

[0023] The deformable part is capable of deformation, and the rigid part is connected to the oil radiator and the water radiator through the deformable part.

[0024] The present invention also provides a heat dissipation method, comprising:

[0025] Obtain the temperature of the engine coolant and the temperature of the hydraulic oil;

[0026] The oscillation direction and oscillation angle of the cooling fan are controlled according to the temperature of the coolant and the temperature of the hydraulic oil.

[0027] According to a heat dissipation method provided by the present invention, when the temperature of the coolant is less than a preset value, the step of controlling the oscillation direction of the cooling fan based on the temperature of the coolant and the temperature of the hydraulic oil includes:

[0028] The heat dissipation priority of water radiators and oil radiators is determined based on the temperature of the coolant and the temperature of the hydraulic oil.

[0029] Based on the heat dissipation priority of the water radiator and the heat dissipation priority of the oil radiator, the cooling fan is controlled to swing toward the one with the higher heat dissipation priority.

[0030] The oscillation angle of the cooling fan is controlled according to the temperature of the component with lower heat dissipation priority.

[0031] According to a heat dissipation method provided by the present invention, when the temperature of the coolant is greater than or equal to the preset value, the heat dissipation method further includes:

[0032] The engine load is controlled based on the temperature of the coolant and the temperature of the hydraulic oil.

[0033] The present invention also provides a working machine, including the above-described heat dissipation system.

[0034] The heat dissipation system provided by this invention includes a water radiator, an oil radiator, a cooling fan, and a drive device. The water radiator is used to dissipate and cool the engine coolant, and the oil radiator is used to dissipate and cool the hydraulic oil. The cooling surfaces of the water radiator and the oil radiator are angled together. The cooling fan is located on the cooling surface side of both the water radiator and the oil radiator, providing airflow to both surfaces to promote heat dissipation. The cooling fan can oscillate back and forth around a reference axis parallel to the cooling surfaces of both the water radiator and the oil radiator. The drive device drives the cooling fan to oscillate around the reference axis. By oscillating the cooling fan, the direction of the airflow output by the cooling fan can be adjusted, thereby adjusting the airflow delivered to the water radiator and the oil radiator respectively. This configuration allows for adjusting the oscillation angle of the cooling fan based on the cooling needs and priority of the water and oil radiators. This increases the airflow provided to radiators with high cooling needs or higher priority, while decreasing the airflow provided to radiators with low cooling needs or lower priority. In other words, it supplies airflow to both water and oil radiators on demand, simultaneously addressing their cooling requirements. This solves the problem in existing technologies where a single cooling fan cannot simultaneously meet the cooling needs of both water and oil radiators. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the heat dissipation system provided by the present invention when the swing angle of the cooling fan is 0 degrees;

[0037] Figure 2 This is a schematic diagram of the heat dissipation system provided by the present invention when the cooling fan has a certain swing angle;

[0038] Figure 3 This is a flowchart of the heat dissipation method provided by the present invention.

[0039] Figure label:

[0040] 1. Water radiator; 2. Oil radiator; 3. Mounting base; 4. Blade section; 5. Shaft section; 6. Engine; 7. Universal joint; 8. Drive cylinder; 9. Rigid body section; 10. Deformable section; 11. Bearing. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] The following is combined with Figures 1 to 2 A heat dissipation system according to an embodiment of the present invention is described.

[0043] like Figures 1 to 2 As shown, this embodiment of the invention provides a heat dissipation system, including a water radiator 1, an oil radiator 2, a cooling fan, and a drive device. The water radiator 1 is used to dissipate and cool the coolant of the engine 6, and the oil radiator 2 is used to dissipate and cool the hydraulic oil.

[0044] Specifically, the heat dissipation surfaces of the water radiator 1 and the oil radiator 2 are arranged at an angle, specifically in a V-shape. Considering the heat dissipation effect and the space occupied by the cooling system, the angle between the heat dissipation surfaces of the water radiator 1 and the oil radiator 2 can be controlled within the range of 150 degrees to 170 degrees; specifically, the angle between the heat dissipation surfaces of the water radiator 1 and the oil radiator 2 can be set to 160 degrees.

[0045] The cooling fan is located on the heat dissipation side of the water radiator 1 and the heat dissipation side of the oil radiator 2, and can provide airflow to the heat dissipation surfaces of the water radiator 1 and the oil radiator 2 to promote the heat dissipation of the water radiator 1 and the oil radiator 2.

[0046] The cooling fan can oscillate back and forth around a reference axis, which is parallel to the heat dissipation surfaces of both the water radiator 1 and the oil radiator 2. Figure 1 As shown, the reference axis is a straight line passing through point m and perpendicular to the plane of the paper (the plane in which the figure is located). The drive unit is used to drive the cooling fan to oscillate around the reference axis.

[0047] By oscillating the cooling fan, the direction of the airflow output by the cooling fan can be adjusted, thereby adjusting the airflow delivered to the water radiator 1 and the oil radiator 2 respectively.

[0048] This configuration allows for adjusting the oscillation angle of the cooling fan based on the cooling requirements and priority of the water radiator 1 and the oil radiator 2. This appropriately increases the airflow provided to the radiator with high cooling requirements or higher priority, while appropriately reducing the airflow provided to the radiator with low cooling requirements or lower priority. In other words, it supplies airflow to the water radiator 1 and the oil radiator 2 on demand, thus simultaneously meeting the cooling needs of both radiators. This solves the problem in existing technologies where the same cooling fan cannot simultaneously meet the cooling needs of both water radiators 1 and oil radiators 2.

[0049] In this embodiment of the invention, the cooling fan includes a mounting base 3 and rotating blades. The rotating blades include a blade portion 4 and a shaft portion 5. The shaft portion 5 is fixedly connected to the blade portion 4 and rotatably connected to the mounting base 3. When the shaft portion 5 rotates relative to the mounting base 3, the blade portion 4 can provide airflow.

[0050] The shaft 5 of the rotating blade is connected to the mounting base 3 via the bearing 11. The shaft 5 is fixedly connected to the inner ring of the bearing 11, and the mounting base 3 is fixedly connected to the outer ring of the bearing 11.

[0051] Mounting base 3 is rotatable relative to water radiator 1 and oil radiator 2. The rotation axis of mounting base 3 coincides with the reference axis. A drive device is used to drive mounting base 3 to rotate. When the drive device drives mounting base 3 to rotate, mounting base 3 can drive the cooling fan to swing.

[0052] Specifically, a support frame can be set up, which is fixed relative to the water radiator 1 and the oil radiator 2, and the mounting base 3 is rotatably connected to the support frame.

[0053] The rotation of the blades can be directly powered by engine 6. In other words, engine 6 provides power to both the hydraulic pump and other components, as well as the rotating blades of the cooling fan. The shaft 5 of the rotating blades is connected to the output shaft of engine 6 via a transmission mechanism. When the cooling fan swings to different angles, the universal joint 7 can transmit the rotation of the output shaft of engine 6 to the shaft 5 of the rotating blades.

[0054] Specifically, the transmission mechanism includes at least a universal joint 7, which is disposed between the shaft portion 5 of the rotating blade and the output shaft of the engine 6. One end of the universal joint 7 is fixedly connected to the shaft portion 5 of the rotating blade, and the other end is drivenly connected to the output shaft of the engine 6.

[0055] Specifically, the other end of the universal joint 7 can be connected to the output shaft of the engine 6 via a belt drive assembly.

[0056] In this way, by using engine 6 to provide power for the rotation of the blades, the use of power components is reduced, which helps to reduce costs and save energy.

[0057] For the rotation of the rotating blades, a special drive unit can be configured for the rotating blades. That is to say, the cooling fan also includes a drive unit, which is used to drive the shaft 5 to rotate relative to the mounting base 3.

[0058] Specifically, the driving component includes a motor, the motor housing is fixedly connected to the mounting base 3, and the output shaft of the motor is connected to the shaft portion 5 of the rotating blade for transmission, resulting in a simple structure.

[0059] The aforementioned drive devices may include, but are not limited to, hydraulic cylinders, pneumatic cylinders, electric cylinders, gear and rack transmission mechanisms, lead screw and nut transmission mechanisms, belt transmission mechanisms, etc.

[0060] In this embodiment of the invention, a drive cylinder 8 is selected as the drive device. That is, the drive device includes a drive cylinder 8, the axis of which is perpendicular to the reference axis, and there is a gap between the drive cylinder 8 and the reference axis. When the drive cylinder 8 extends or retracts, it can generate a torque about the reference axis on the mounting base 3. The first end of the drive cylinder 8 is rotatably connected to the mounting base 3, and the second end of the drive cylinder 8 is rotatably connected to the housing of the engine 6. The rotation axis of the drive cylinder 8 relative to the mounting base 3 and the rotation axis of the drive cylinder 8 relative to the engine 6 are both parallel to the reference axis.

[0061] Taking the selection of a hydraulic cylinder as the driving device as an example, the cylinder end of the hydraulic cylinder is hinged to the housing of the engine 6 through the first hinge shaft, and the piston rod of the hydraulic cylinder is hinged to the mounting base 3 through the second hinge shaft. The axis of the first hinge shaft and the axis of the second hinge shaft are both parallel to the reference axis.

[0062] In this embodiment of the invention, the heat dissipation system further includes a protective cover, which is disposed around the blade portion 4. The first end of the protective cover is sealed and connected to the oil radiator 2 and the water radiator 1, and the second end of the protective cover is open. When the rotating blades rotate, air can circulate orderly inside the protective cover, avoiding airflow loss and helping to ensure the heat dissipation performance of the water radiator 1 and the oil radiator 2.

[0063] The second end of the shield is fixedly connected to the mounting base 3. When the mounting base 3 drives the rotating blades to swing, the shield moves together with the mounting base 3, which can ensure the gap between the rotating blades and the shield, avoid interference between the rotating blades and the shield, and ensure that the cooling fan can operate smoothly.

[0064] In this embodiment, the protective cover includes a rigid body 9 and a deformable part 10. The rigid body 9 is a cylindrical structure with openings at both ends. The rigid body 9 is sleeved on the outside of the blade part 4. The end of the rigid body 9 away from the oil radiator 2 and the water radiator 1 is connected to the mounting base 3 via a connecting rod. Specifically, three connecting rods can be provided between the rigid body 9 and the mounting base 3, and the three connecting rods are distributed at intervals along the circumference of the mounting base 3.

[0065] The deformable part 10 can deform under force, and the rigid part 9 is connected to the oil radiator 2 and the water radiator 1 through the deformable part 10. When the mounting base 3 rotates, the rigid part 9 can exert a certain force on the deformable part 10, causing the deformable part 10 to deform, thereby allowing the rigid part 9 to move with the mounting base 3.

[0066] In a specific embodiment, the deformable part 10 may be made of corrugated material, but is not limited to.

[0067] In summary, the heat dissipation system provided by this embodiment of the invention occupies a small space, is easy to arrange, and can maximize heat dissipation within a confined space to protect the components at a suitable operating temperature, making it suitable for small or micro-sized machinery. Furthermore, the cooling fan can oscillate, allowing the oscillation angle to be adjusted according to the heat dissipation requirements of the water radiator 1 and the oil radiator 2, as well as the priority of those requirements. This allows for the supply of airflow to both radiators simultaneously, meeting the heat dissipation needs of both simultaneously.

[0068] On the other hand, the present invention also provides a heat dissipation method based on the heat dissipation system provided in any of the above embodiments. The heat dissipation method described below can be referred to in correspondence with the heat dissipation system described above.

[0069] like Figure 3 As shown, the heat dissipation method provided in this embodiment of the invention includes:

[0070] Step 110: Obtain the temperature of the engine coolant and the temperature of the hydraulic oil.

[0071] Step 120: Control the oscillation direction and oscillation angle of the cooling fan according to the temperature of the coolant and the temperature of the hydraulic oil.

[0072] The temperatures of the coolant and hydraulic oil in engine 6 can represent the cooling requirements of water radiator 1 and oil radiator 2, respectively. Specifically, a first temperature sensor for detecting the coolant temperature of engine 6 can be installed inside water radiator 1, and a second temperature sensor for detecting the hydraulic oil temperature can be installed inside oil radiator 2.

[0073] Based on the cooling requirements of water radiator 1 and oil radiator 2, the oscillation angle of the cooling fan is adjusted to appropriately increase the airflow provided to the radiator with higher cooling requirements and appropriately reduce the airflow provided to the radiator with lower cooling requirements. In other words, airflow is supplied to water radiator 1 and oil radiator 2 on demand, which can simultaneously meet the cooling requirements of water radiator 1 and oil radiator 2, and achieve dynamic adjustment of the temperature of coolant and hydraulic oil in engine 6. This solves the problem in the prior art where the same cooling fan cannot simultaneously meet the cooling requirements of water radiator 1 and oil radiator 2 when cooling water radiator 1 and oil radiator 2.

[0074] When the coolant temperature is lower than the preset value, the oscillation direction of the cooling fan is controlled according to the coolant temperature and the hydraulic oil temperature. First, the heat dissipation priority of water radiator 1 and oil radiator 2 can be determined according to the coolant temperature and the hydraulic oil temperature. Then, the cooling fan is controlled to oscillate towards the one with higher heat dissipation priority according to the heat dissipation priority of water radiator 1 and oil radiator 2. Finally, the oscillation angle of the cooling fan is controlled according to the temperature of the one with lower heat dissipation priority.

[0075] When the coolant temperature is greater than or equal to the preset value, the load of engine 6 is controlled according to the coolant temperature and hydraulic oil temperature. If necessary, the heat generated by engine 6 is reduced by reducing the load of engine 6, thereby reducing the coolant temperature of engine 6.

[0076] The preset value can be, but is not limited to, 95 degrees Celsius.

[0077] When the coolant temperature is below 95 degrees Celsius, the specific heat dissipation methods are as follows:

[0078] When the coolant temperature is below 82 degrees Celsius:

[0079] If the temperature of the hydraulic oil is less than 60 degrees Celsius, the cooling fan will not swing; that is, the swing angle of the cooling fan will be 0 degrees.

[0080] If the temperature of the hydraulic oil is greater than or equal to 60 degrees Celsius, the cooling fan is controlled to swing towards the oil cooler 2, and the swing angle of the cooling fan is controlled according to the temperature of the hydraulic oil. The higher the temperature of the hydraulic oil, the greater the swing angle of the cooling fan.

[0081] When the coolant temperature is greater than or equal to 82 degrees Celsius and less than 95 degrees Celsius:

[0082] If the temperature of the hydraulic oil is less than 85 degrees Celsius, the cooling priority of water radiator 1 is higher than that of oil radiator 2. The cooling fan is controlled to swing towards water radiator 1, and the swing angle of the cooling fan is controlled according to the temperature of the hydraulic oil. The lower the temperature of the hydraulic oil, the larger the swing angle of the cooling fan.

[0083] If the temperature of the hydraulic oil is greater than or equal to 85 degrees Celsius, the cooling priority of the oil radiator 2 is higher than that of the water radiator 1. The cooling fan is controlled to swing towards the oil radiator 2, and the swing angle of the cooling fan is controlled according to the temperature of the coolant. The lower the temperature of the coolant, the larger the swing angle of the cooling fan.

[0084] When the coolant temperature is greater than or equal to 95 degrees Celsius, the specific heat dissipation methods are as follows:

[0085] When the coolant temperature is greater than or equal to 95 degrees Celsius and less than 102 degrees Celsius:

[0086] If the temperature of the hydraulic oil is less than 85 degrees Celsius, the cooling priority of water radiator 1 is higher than that of oil radiator 2. Control the cooling fan to swing towards water radiator 1 to the limit angle, such as 10 degrees.

[0087] If the temperature of the hydraulic oil is greater than or equal to 85 degrees Celsius, the cooling priority of the water radiator 1 is equivalent to that of the oil radiator 2. The cooling fan is controlled not to swing, that is, the swing angle of the cooling fan is 0 degrees, and the torque of the hydraulic pump is controlled to decrease by a certain value, for example, the torque of the hydraulic pump is controlled to decrease by 5%. By reducing the load on the engine 6, the temperature of the coolant is reduced.

[0088] When the coolant temperature is greater than or equal to 102 degrees Celsius, the protection mechanism of engine 6 will be triggered, and the torque and speed of engine 6 may be limited.

[0089] If the temperature of the hydraulic oil is less than 85 degrees Celsius, the cooling priority of water radiator 1 is higher than that of oil radiator 2. Control the cooling fan to swing towards the water radiator to the limit angle, such as 10 degrees.

[0090] If the temperature of the hydraulic oil is greater than or equal to 85 degrees Celsius, the cooling priority of the water radiator 1 is higher than that of the oil radiator 2. The cooling fan is controlled to swing towards the water radiator 1 to the limit angle, such as 10 degrees, and the torque of the hydraulic pump is controlled to decrease by a certain value, for example, by 5%. By reducing the load on the engine 6, the temperature of the coolant is lowered.

[0091] Furthermore, embodiments of the present invention also provide a working machine, including the cooling system provided in any of the above embodiments. The cooling system is used to dissipate heat and cool the engine coolant and hydraulic oil. The cooling system provided in the above embodiments only has one cooling fan and can simultaneously meet the cooling needs of both water radiators and oil radiators. Therefore, the working machine in this embodiment has the advantages of simple structure and good heat dissipation performance. The derivation process of the beneficial effects of the working machine in the embodiments of the present invention is largely similar to the derivation process of the beneficial effects of the cooling system described above, and therefore will not be repeated here.

[0092] In embodiments of the present invention, the type of operating machinery is not limited; for example, the operating machinery may be an excavator, crane, loader, etc. In other words, as long as the operating machinery can use the heat dissipation system in the embodiments of the present invention, it is acceptable.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation system, characterized in that, include: A water radiator is used to dissipate heat and cool the engine coolant. The water radiator is equipped with a first temperature sensor for detecting the temperature of the engine coolant. An oil radiator is used to cool down hydraulic oil. The heat dissipation surface of the water radiator and the heat dissipation surface of the oil radiator are set at an angle. A second temperature sensor for detecting the temperature of hydraulic oil is installed inside the oil radiator. A cooling fan is capable of providing airflow to the heat dissipation surfaces of the water radiator and the oil radiator. The cooling fan is capable of oscillating back and forth around a reference axis, which is parallel to the heat dissipation surfaces of the water radiator and the oil radiator. The driving device is configured to drive the cooling fan to oscillate around the reference axis. When the cooling system is used to cool down the engine's coolant and hydraulic oil, it acquires the temperature of the engine's coolant and hydraulic oil, and controls the oscillation direction and oscillation angle of the cooling fan based on the temperature of the coolant and the temperature of the hydraulic oil. When the temperature of the coolant is less than a preset value, the step of controlling the oscillation direction of the cooling fan according to the temperature of the coolant and the temperature of the hydraulic oil includes: determining the heat dissipation priority of the water radiator and the oil radiator according to the temperature of the coolant and the temperature of the hydraulic oil. Based on the heat dissipation priority of the water radiator and the heat dissipation priority of the oil radiator, the cooling fan is controlled to swing towards the one with higher heat dissipation priority; based on the temperature of the one with lower heat dissipation priority, the swing angle of the cooling fan is controlled. When the temperature of the coolant is greater than or equal to the preset value, the load of the engine is controlled according to the temperature of the coolant and the temperature of the hydraulic oil.

2. The heat dissipation system according to claim 1, characterized in that, The cooling fan includes: The mounting base is rotatable relative to the water radiator and the oil radiator, the rotation axis of the mounting base coincides with the reference axis, and the driving device is configured to drive the mounting base to rotate. The rotating blade includes a blade portion for providing airflow and a shaft portion connected to the blade portion, the shaft portion being rotatably connected to the mounting base; The shaft is connected to the output shaft of the engine via a transmission mechanism, or the cooling fan may further include a drive component capable of driving the shaft to rotate relative to the mounting base.

3. The heat dissipation system according to claim 2, characterized in that, The transmission mechanism includes at least: A universal joint is provided between the shaft and the output shaft of the engine.

4. The heat dissipation system according to claim 2, characterized in that, The driving device includes: A drive cylinder, the axis of which is perpendicular to the reference axis and there is a gap between the drive cylinder and the reference axis, the first end of which is rotatably connected to the mounting base, the second end of which is rotatably connected to the engine, and the rotation axis of the drive cylinder relative to the mounting base and the rotation axis of the drive cylinder relative to the engine are both parallel to the reference axis.

5. The heat dissipation system according to claim 2, characterized in that, Also includes: A protective cover is provided around the periphery of the blade portion. The first end of the protective cover is sealed and connected to the oil radiator and the water radiator. The second end of the protective cover is open and fixedly connected to the mounting base.

6. The heat dissipation system according to claim 5, characterized in that, The protective cover includes: The rigid body is a cylindrical structure with openings at both ends. The rigid body is sleeved on the outside of the blade part. The end of the rigid body away from the oil radiator and the water radiator is connected to the mounting base through a connecting rod. The deformable part is capable of deformation, and the rigid part is connected to the oil radiator and the water radiator through the deformable part.

7. A heat dissipation method, characterized in that, Based on the heat dissipation system according to any one of claims 1-6, the heat dissipation method includes: Obtain the temperature of the engine coolant and the temperature of the hydraulic oil; The oscillation direction and oscillation angle of the cooling fan are controlled according to the temperature of the coolant and the temperature of the hydraulic oil.

8. The heat dissipation method according to claim 7, characterized in that, When the temperature of the coolant is lower than a preset value, the step of controlling the oscillation direction of the cooling fan based on the temperature of the coolant and the temperature of the hydraulic oil includes: The heat dissipation priority of water radiators and oil radiators is determined based on the temperature of the coolant and the temperature of the hydraulic oil. Based on the heat dissipation priority of the water radiator and the heat dissipation priority of the oil radiator, the cooling fan is controlled to swing toward the one with the higher heat dissipation priority. The oscillation angle of the cooling fan is controlled according to the temperature of the component with lower heat dissipation priority.

9. The heat dissipation method according to claim 8, characterized in that, When the temperature of the coolant is greater than or equal to the preset value, the heat dissipation method further includes: The engine load is controlled based on the temperature of the coolant and the temperature of the hydraulic oil.

10. A type of operating machinery, characterized in that, Includes the heat dissipation system as described in any one of claims 1-6.

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