Working machine cooling system and working machine

Abstract

The utility model relates to the technical field of operating machinery, and discloses an operating machinery cooling system and operating machinery, and the operating machinery cooling system comprises a fan, a hydraulic motor, a driving pump and an energy accumulator. The fan is used for dissipating heat of a radiator of the operation machine. The hydraulic motor is connected with the fan and used for driving the fan to rotate forwards or backwards, and the hydraulic motor is provided with a first oil port and a second oil port; the driving pump is connected with the first oil port through a first oil way and connected with the second oil port through a second oil way. The energy accumulator is arranged on the second oil way, a one-way valve and a switch valve are arranged on the second oil way, the one-way valve is located between the energy accumulator and the driving pump, and the switch valve is located between the energy accumulator and the hydraulic motor. The hydraulic motor is driven by the driving pump to drive the fan to rotate forwards to suck air so as to achieve heat dissipation of the radiator, in addition, the hydraulic motor is reversely driven by the energy accumulator to drive the fan to rotate reversely to blow air so as to achieve dust removal of the radiator, energy consumption is reduced, and use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of operating machinery, in particular to an operating machinery cooling system and an operating machinery. Background Art

[0002] The cooling system of operating machinery usually uses a fan to draw air from the outside, so that the airflow passes through the radiator to achieve the heat dissipation function of the operating machinery. Since operating machinery is often used in tunnels, construction sites, mines and other working conditions with a lot of dust, the dust is easily adsorbed on the radiator, resulting in a reduction in the air circulation area of ​​the radiator and an increase in static pressure, thereby weakening the heat dissipation capacity of the radiator.

[0003] For this reason, existing working machines usually connect electromagnetic reversing valves in series on the cooling system, and the fan reverses and blows air through the reversal of the electromagnetic reversing valve to remove dust on the radiator. The disadvantage of this structure is that there is throttling loss when the oil flows through the electromagnetic reversing valve, so the energy consumption of the cooling system is large, resulting in high cost of use. Utility Model Content

[0004] In view of this, the utility model provides a working machine cooling system and working machine to solve the problem that the cooling system uses an electromagnetic reversing valve to switch the fan, which causes throttling loss, large energy consumption and high use cost.

[0005] In a first aspect, the utility model provides a working machine cooling system, comprising:

[0006] A fan is used to dissipate heat from the radiator of the operating machinery;

[0007] A hydraulic motor connected to the fan and used to drive the fan to rotate forward or reversely, and the hydraulic motor is provided with a first oil port and a second oil port;

[0008] A driving pump connected to the first oil port through a first oil circuit and connected to the second oil port through a second oil circuit;

[0009] The accumulator is arranged on the second oil circuit. A one-way valve and a switch valve are arranged on the second oil circuit. The one-way valve is located between the accumulator and the driving pump, and the switch valve is located between the accumulator and the hydraulic motor.

[0010] Beneficial effects: The driving pump provided by the utility model is connected to the first oil port of the hydraulic motor through the first oil circuit, and can drive the hydraulic motor to rotate forward, so that the hydraulic motor drives the fan to rotate forward to suck air, so as to achieve the heat dissipation of the radiator. At the same time, since the driving pump is connected to the second oil port through the second oil circuit, and the accumulator is arranged on the second oil circuit, the driving pump can also drive the hydraulic motor to rotate forward to achieve the heat dissipation of the radiator, and replenish the oil to the accumulator through the second oil circuit. In addition, by opening the switch valve and closing the driving pump, the accumulator can be used as a power source to drive the hydraulic motor to reverse, so that the hydraulic motor drives the fan to reverse and blow air, so as to achieve the dust removal of the radiator. Compared with the traditional method of using an electromagnetic reversing valve to reverse the fan, the utility model avoids the throttling loss caused by the pressure loss of the electromagnetic reversing valve port, so that the energy consumption can be reduced. The accumulator stores energy when the fan rotates forward, and provides energy when the fan blows back to remove dust, which can reduce the use cost. A one-way valve is arranged on the second oil circuit to prevent the oil from flowing back to the driving pump through the second oil circuit.

[0011] In an optional embodiment, it also includes an oil tank and a first hydraulically controlled one-way valve, the second oil port is connected to the oil tank through an oil return circuit, the drive pump is connected to the oil return circuit through the first hydraulically controlled oil circuit, and the first hydraulically controlled one-way valve is located at the connection between the first hydraulically controlled oil circuit and the oil return circuit.

[0012] Beneficial effect: Since the driving pump is connected to the oil return circuit through the first hydraulic control oil circuit, the first hydraulic control one-way valve is located at the connection between the first hydraulic control oil circuit and the oil return circuit. Therefore, while the driving pump supplies oil to the first oil port of the hydraulic motor through the first oil circuit, it also inputs the oil into the first hydraulic control one-way valve through the first hydraulic control oil circuit, so that the first hydraulic control one-way valve is turned on, which is convenient for recovering the oil used in the second oil port into the oil tank through the oil return circuit. In addition, when the fan is reversed, the driving pump is turned off and the switch valve is turned on, and the first hydraulic control one-way valve is used as a one-way valve to block the connection between the oil return circuit and the oil tank, so as to prevent the oil from directly entering the oil tank from the oil return circuit.

[0013] In an optional embodiment, a second hydraulically controlled one-way valve is further included, the first oil circuit is also connected to the oil tank through the third oil circuit, the second oil circuit is also connected to the third oil circuit through the second hydraulically controlled oil circuit, and the second hydraulically controlled one-way valve is located at the connection between the third oil circuit and the second hydraulically controlled oil circuit.

[0014] Beneficial effect: When the switch valve is turned on and the drive pump is turned off, the accumulator reversely drives the hydraulic motor through the second oil circuit, and at the same time, the oil is input into the second hydraulically controlled one-way valve through the second hydraulically controlled oil circuit, so that the second hydraulically controlled one-way valve is turned on. The oil used by the hydraulic motor can be recovered into the oil tank through the first oil circuit and the third oil circuit. When the drive pump is turned on and the switch valve is turned off, the second hydraulically controlled one-way valve is used as a one-way valve to prevent the oil from directly entering the oil tank from the third oil circuit.

[0015] In an optional embodiment, the driving pump is provided with an oil inlet and an oil outlet, the oil inlet is connected to the oil tank via an oil inlet oil circuit, and the oil outlet is connected to the first oil circuit.

[0016] Beneficial effect: the oil inlet of the driving pump is connected to the oil tank through the oil inlet oil circuit, so that the oil tank supplies oil to the driving pump; the oil outlet of the driving pump is connected to the first oil circuit, so that the driving pump inputs oil into the hydraulic motor through the first oil circuit, drives the fan to rotate forward to absorb air, and dissipates heat for the radiator.

[0017] In an optional implementation, the first oil circuit is also connected to the second oil circuit.

[0018] Beneficial effect: Since the first oil circuit is also connected to the second oil circuit, the second oil circuit can use part of the pipeline of the first oil circuit to reduce the length of the second oil circuit and further reduce the use cost.

[0019] In an optional embodiment, the hydraulic motor is further provided with an oil drain port, and the oil drain port is connected to the oil tank through an oil drain oil circuit.

[0020] Beneficial effect: By setting the oil drain port, the oil that penetrates into the housing of the hydraulic motor can be drained back into the oil tank, reducing the housing pressure of the hydraulic motor to ensure the safe operation of the hydraulic motor.

[0021] In an optional embodiment, a controller is further included, which is electrically connected to the switch valve and is used to control the opening and closing of the switch valve.

[0022] Beneficial effect: The operator can control the opening and closing of the switch valve through the controller to control the forward and reverse rotation of the fan.

[0023] In an optional embodiment, an operation button is further included, and the operation button is used to send an operation instruction. The controller is electrically connected to the operation button and is used to receive the operation instruction to control the opening and closing of the switch valve.

[0024] Beneficial effect: The operation command is sent by the operation button, and the operation command is received by the controller to control the opening and closing of the switch valve, which simplifies the operation of opening and closing the switch valve.

[0025] In an optional embodiment, it also includes a display screen, the operation buttons are touch buttons arranged on the display screen, and the display screen is electrically connected to the controller.

[0026] Beneficial effects: Setting the operation buttons as touch buttons on the display screen has high variability and customizability, which is conducive to popularization and use. The display screen can intuitively display the working status of the cooling system of the operating machinery.

[0027] In a second aspect, the utility model further provides an operating machine, comprising:

[0028] heat sink;

[0029] The above-mentioned operating machinery cooling system.

[0030] Beneficial effects: The operating machine includes a cooling system, and the driving pump is connected to the first oil port of the hydraulic motor through the first oil circuit, and can drive the hydraulic motor to rotate forward, so that the hydraulic motor drives the fan to rotate forward to suck air, so as to achieve the heat dissipation of the radiator. At the same time, since the driving pump is connected to the second oil port through the second oil circuit, and the accumulator is arranged on the second oil circuit, the driving pump can also drive the hydraulic motor to rotate forward to achieve the heat dissipation of the radiator, and replenish the oil to the accumulator through the second oil circuit. In addition, by opening the switch valve and closing the driving pump, the accumulator can be used as a power source to drive the hydraulic motor to reverse, so that the hydraulic motor drives the fan to reverse and blow air, so as to achieve the dust removal of the radiator. Compared with the traditional method of using an electromagnetic reversing valve to reverse the fan, the utility model avoids the throttling loss caused by the pressure loss of the valve port of the electromagnetic reversing valve, so that the energy consumption can be reduced, and the accumulator stores energy when the fan rotates forward, and provides energy when the fan blows back to remove dust, which can reduce the use cost. A one-way valve is arranged on the second oil circuit to prevent the oil from flowing back to the driving pump through the second oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 The present invention is a schematic structural diagram of a cooling system for an operating machine according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Fan; 2. Hydraulic motor; 201. First oil port; 202. Second oil port; 3. Drive pump; 4. First oil circuit; 5. Second oil circuit; 6. Accumulator; 7. Check valve; 8. Switch valve; 9. Oil tank; 10. Return oil circuit; 11. First hydraulic control oil circuit; 12. First hydraulic control check valve; 13. Third oil circuit; 14. Second hydraulic control oil circuit; 15. Second hydraulic control check valve; 16. Oil inlet circuit; 17. Oil drain circuit; 18. Controller; 19. Operation buttons; 20. Display screen; 21. Radiator. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0036] In view of the existing structure of connecting an electromagnetic reversing valve in series on the cooling system of an operating machine to realize the fan's forward rotation to absorb air for heat dissipation and reverse blowing to remove dust, there is a throttling loss, and the energy consumption of the cooling system is large, resulting in a high cost of use. The driving pump provided in the embodiment of the utility model is connected to the first oil port through the first oil circuit to drive the fan to rotate forward to absorb air for heat dissipation. In addition, the accumulator drives the fan to reverse blowing to remove dust through the second oil circuit, which reduces the throttling loss and energy consumption, thereby reducing the cost of use.

[0037] Combine the following Figure 1 , describing an embodiment of the utility model.

[0038] According to an embodiment of the present utility model, on the one hand, as Figure 1 As shown, a working machine cooling system is provided, which mainly includes: a fan 1, a hydraulic motor 2, a drive pump 3 and an accumulator 6. The fan 1 is used to dissipate heat from a radiator 21 of the working machine. The hydraulic motor 2 is connected to the fan 1, and is used to drive the fan 1 to rotate forward or reverse. The hydraulic motor 2 is provided with a first oil port 201 and a second oil port 202. The drive pump 3 is connected to the first oil port 201 through a first oil circuit 4, and is connected to the second oil port 202 through a second oil circuit 5. The accumulator 6 is arranged on the second oil circuit 5, and a one-way valve 7 and a switch valve 8 are provided on the second oil circuit 5. The one-way valve 7 is located between the accumulator 6 and the drive pump 3, and the switch valve 8 is located between the accumulator 6 and the hydraulic motor 2.

[0039] The driving pump 3 provided in the embodiment of the utility model is connected to the first oil port 201 of the hydraulic motor 2 through the first oil circuit 4, and can drive the hydraulic motor 2 to rotate forward, so that the hydraulic motor 2 drives the fan 1 to rotate forward to suck air, so as to achieve heat dissipation of the radiator 21. At the same time, since the driving pump 3 is connected to the second oil port 202 through the second oil circuit 5, and the accumulator 6 is arranged on the second oil circuit 5, the driving pump 3 can also drive the hydraulic motor 2 to rotate forward to achieve heat dissipation of the radiator 21, and replenish oil to the accumulator 6 through the second oil circuit 5. In addition, by opening the switch valve 8 and closing the driving pump 3, the accumulator 6 can be used as a power source to drive the hydraulic motor 2 to reverse, so that the hydraulic motor 2 drives the fan 1 to blow air in the reverse direction, so as to achieve dust removal of the radiator 21. Compared with the traditional method of using an electromagnetic reversing valve to reverse the fan 1, the utility model avoids the throttling loss caused by the pressure loss of the valve port of the electromagnetic reversing valve, so that the energy consumption can be reduced. The accumulator 6 stores energy when the fan 1 rotates forward, and provides energy when the fan 1 blows back to remove dust, which can reduce the use cost. A one-way valve 7 is provided on the second oil circuit 5 to prevent the oil from flowing back to the driving pump 3 through the second oil circuit 5 .

[0040] In addition, compared with the conventional hydraulic motor 2 whose swash plate angle can be reversely adjusted, the forward and reverse control of the fan 1 is realized. The cooling system of the working machine provided by the embodiment of the utility model has a simpler structure and is less difficult to process and manufacture.

[0041] Specifically, the hydraulic motor 2 is provided with an output shaft, and the fan 1 is connected to the output shaft. The hydraulic motor 2 drives the fan 1 to rotate forward and reversely at the same time. In order to ensure that the accumulator 6 can be normally supplied with oil, an oil inlet port is provided on the accumulator 6, and oil can also be supplied to the accumulator 6 from the outside through the oil inlet port.

[0042] In one embodiment, Figure 1 As shown, the operating machine cooling system also includes an oil tank 9 and a first hydraulically controlled one-way valve 12. The oil tank 9 is used to supply oil to the drive pump 3 and to recover the return oil of the hydraulic motor 2 after use. The second oil port 202 is connected to the oil tank 9 through the return oil line 10, the drive pump 3 is connected to the return oil line 10 through the first hydraulically controlled oil line 11, and the first hydraulically controlled one-way valve 12 is located at the connection between the first hydraulically controlled oil line 11 and the return oil line 10.

[0043] The driving pump 3 provided in the embodiment of the utility model supplies oil to the first oil port 201 of the hydraulic motor 2 through the first oil circuit 4, and also inputs the oil into the first hydraulically controlled one-way valve 12 through the first hydraulically controlled oil circuit 11, so that the first hydraulically controlled one-way valve 12 is turned on, so as to facilitate the oil used in the second oil port 202 to be recovered into the oil tank 9 through the oil return oil circuit 10. In addition, when the fan 1 is reversed, the driving pump 3 is turned off and the switch valve 8 is turned on, and the first hydraulically controlled one-way valve 12 is used as a one-way valve to block the connection between the oil return oil circuit 10 and the oil tank 9, so as to prevent the oil from directly entering the oil tank 9 from the oil return oil circuit 10.

[0044] In one embodiment, Figure 1 As shown, the operating machinery cooling system also includes a second hydraulically controlled one-way valve 15, the first oil circuit 4 is also connected to the oil tank 9 through the third oil circuit 13, the second oil circuit 5 is also connected to the third oil circuit 13 through the second hydraulically controlled oil circuit 14, and the second hydraulically controlled one-way valve 15 is located at the connection between the third oil circuit 13 and the second hydraulically controlled oil circuit 14.

[0045] When the switch valve 8 is turned on and the drive pump 3 is turned off, the accumulator 6 reversely drives the hydraulic motor 2 through the second oil circuit 5, and also inputs oil into the second hydraulically controlled one-way valve 15 through the second hydraulically controlled oil circuit 14, so that the second hydraulically controlled one-way valve 15 is turned on. The oil used by the hydraulic motor 2 can be recovered into the oil tank 9 through the first oil circuit 4 and the third oil circuit 13. When the drive pump 3 is turned on and the switch valve 8 is turned off, the second hydraulically controlled one-way valve 15 is used as a one-way valve to prevent the oil from directly entering the oil tank 9 from the third oil circuit 13.

[0046] Specifically, the first hydraulically controlled one-way valve 12 and the second hydraulically controlled one-way valve 15 are both unidirectional when no oil is input, and are reversely conductive after the oil is input.

[0047] It should be noted that the embodiment of the utility model does not limit the driving pump 3, and the driving pump 3 can select any existing structure as needed.

[0048] In one embodiment, the driving pump 3 is provided with an oil inlet and an oil outlet. The oil inlet of the driving pump 3 is connected to the oil tank 9 through the oil inlet oil circuit 16, so that the oil tank 9 supplies oil to the driving pump 3. The oil outlet of the driving pump 3 is connected to the first oil circuit 4, so that the driving pump 3 inputs oil into the hydraulic motor 2 through the first oil circuit 4, drives the fan 1 to rotate forward to absorb air, and dissipates heat for the radiator 21.

[0049] In one embodiment, the first oil circuit 4 is also connected to the second oil circuit 5. The second oil circuit 5 can use part of the pipeline of the first oil circuit 4 to reduce the length of the second oil circuit 5 and further reduce the use cost.

[0050] It should be noted that the embodiment of the utility model does not limit the connection sequence of the first oil circuit 4 and the second oil circuit 5 and the third oil circuit 13. For example, the connection between the first oil circuit 4 and the second oil circuit 5 is closer to the drive pump 3 than the connection between the first oil circuit 4 and the third oil circuit 13, so that the oil output by the drive pump 3 first enters the second oil circuit 5 through the first oil circuit 4, and then enters the third oil circuit 13 through the first oil circuit 4. Of course, it is also possible to choose to set the connection between the first oil circuit 4 and the third oil circuit 13 closer to the drive pump 3 than the connection between the first oil circuit 4 and the second oil circuit 5 as needed.

[0051] In one embodiment, the hydraulic motor 2 is further provided with an oil drain port. The oil drain port is connected to the oil tank 9 through an oil drain oil passage 17. Since the oil will inevitably penetrate into the housing of the hydraulic motor 2 after entering the hydraulic motor 2, the oil that has penetrated into the housing of the hydraulic motor 2 can be drained back into the oil tank 9 by providing the oil drain port, thereby reducing the housing pressure of the hydraulic motor 2 and ensuring the safe operation of the hydraulic motor 2.

[0052] It should be noted that the above-mentioned valves and oil circuits in the embodiment of the utility model can adopt any existing structure, and the specific settings can be selected according to actual needs. The embodiment of the utility model does not impose too many restrictions on this.

[0053] In one embodiment, Figure 1 As shown, the working machine cooling system further includes a controller 18. The controller 18 is electrically connected to the switch valve 8 and is used to control the opening and closing of the switch valve 8. The operator can control the opening and closing of the switch valve 8 through the controller 18 to control the forward and reverse rotation of the fan 1.

[0054] It should be noted that the controller 18 can select any existing controller as needed. For example, the controller 18 can select an existing controller such as a microcontroller unit (MCU), a central processing unit, an electronic controller unit (ECU), etc. Of course, other conventional controllers can also be selected as needed. This is not limited in the embodiment of the utility model.

[0055] Furthermore, in one embodiment, the operating machine cooling system further includes an operation button 19. The operation button 19 is used to send an operation instruction, and the controller 18 is electrically connected to the operation button 19 and is used to receive the operation instruction to control the opening and closing of the switch valve 8. The operation instruction is sent by the operation button 19, and the operation instruction is received by the controller 18 to realize the control of the opening and closing of the switch valve 8, thereby simplifying the operation of opening and closing the switch valve 8.

[0056] Exemplarily, the operation button 19 can select a conventional button structure such as a physical button, a touch button, etc. For example, the operation button 19 selects a physical button. By pressing the physical button, the switch valve 8 can be controlled to open or close. Compared with the touch button, the physical button can intuitively feedback the operation result, which is conducive to improving the accuracy and efficiency of the operation.

[0057] Furthermore, in one embodiment, the operating machine cooling system further includes a display screen 20, and the operation button 19 is a touch button provided on the display screen 20, and the display screen 20 is electrically connected to the controller 18. Setting the operation button 19 as a touch button on the display screen 20 has high variability and customizability, which is conducive to popularization and use. The display screen 20 can intuitively display the working state of the operating machine cooling system, such as the forward rotation state and reverse rotation state of the fan 1.

[0058] The working principle of the embodiment of the utility model is as follows:

[0059] When the fan 1 absorbs air from the radiator 21 to dissipate heat, the operator controls the switch valve 8 to close through the operation button 19 on the display screen 20, and operates the drive pump 3 to open. The oil tank 9 supplies oil to the drive pump 3 through the oil inlet line 16. The drive pump 3 inputs the oil into the first oil port 201 of the hydraulic motor 2 through the first oil circuit 4, and the hydraulic motor 2 drives the fan 1 to rotate forward to absorb air and dissipate heat for the radiator 21. At the same time, the oil outlet of the drive pump 3 also inputs the oil into the first hydraulic control check valve 12 through the first hydraulic control oil circuit 11, so that the first hydraulic control check valve 12 is turned on. The second oil port 202 of the hydraulic motor 2 recovers the used oil into the oil tank 9 through the first hydraulic control check valve 12 and the return oil circuit 10. In addition, the oil outlet of the drive pump 3 also inputs the oil into the accumulator 6 through the second oil circuit 5 to replenish the oil.

[0060] When the fan 1 blows air to remove dust from the radiator 21, the operator controls the switch valve 8 to open through the operation button 19 on the display screen 20, and operates the drive pump 3 to close. The accumulator 6 inputs the oil into the second oil port 202 of the hydraulic motor 2 through the second oil circuit 5, and the hydraulic motor 2 drives the fan 1 to blow air in reverse to remove dust from the radiator 21. At the same time, the accumulator 6 also inputs the oil into the second hydraulic control check valve 15 through the second hydraulic control oil circuit 14, so that the second hydraulic control check valve 15 is turned on. The first oil port 201 of the hydraulic motor 2 recovers the used oil into the oil tank 9 through the first oil circuit 4 and the third oil circuit 13.

[0061] According to an embodiment of the present utility model, on the other hand, a working machine is also provided, which mainly includes: a radiator 21 and a working machine cooling system.

[0062] The working machine provided by the embodiment of the utility model includes a cooling system, and the driving pump 3 is connected to the first oil port 201 of the hydraulic motor 2 through the first oil circuit 4, and can drive the hydraulic motor 2 to rotate forward, so that the hydraulic motor 2 drives the fan 1 to rotate forward to suck air, so as to achieve heat dissipation of the radiator 21. At the same time, since the driving pump 3 is connected to the second oil port 202 through the second oil circuit 5, and the accumulator 6 is arranged on the second oil circuit 5, the driving pump 3 can also drive the hydraulic motor 2 to rotate forward to achieve heat dissipation of the radiator 21, and replenish oil to the accumulator 6 through the second oil circuit 5. In addition, by opening the switch valve 8 and closing the driving pump 3, the accumulator 6 can be used as a power source to drive the hydraulic motor 2 to reverse, so that the hydraulic motor 2 drives the fan 1 to blow air in the reverse direction, so as to achieve dust removal of the radiator 21. Compared with the traditional method of using an electromagnetic reversing valve to reverse the fan 1, the utility model avoids the throttling loss caused by the pressure loss of the valve port of the electromagnetic reversing valve, so that the energy consumption can be reduced. The accumulator 6 stores energy when the fan 1 rotates forward, and provides energy when the fan 1 blows back to remove dust, which can reduce the use cost. A one-way valve 7 is provided on the second oil circuit 5 to prevent the oil from flowing back to the driving pump 3 through the second oil circuit 5 .

[0063] Specifically, the operating machinery includes but is not limited to excavators, cranes, pile drivers, mixers, etc. The operating machinery has a heat dissipation state and a dust removal state. In the heat dissipation state, the fan 1 is controlled to rotate forward to absorb air, so that the external cooling airflow passes through the radiator 21 to achieve the heat dissipation function. In the dust removal state, the fan 1 is controlled to rotate backward to blow air, and the fan 1 generates airflow to take away the dust on the radiator 21 to achieve the dust removal function.

[0064] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A working machinery cooling system, characterized in that: include: A fan (1) is used to dissipate heat from a radiator of the operating machine; A hydraulic motor (2) connected to the fan (1) and used to drive the fan (1) to rotate forward or reversely, the hydraulic motor (2) being provided with a first oil port (201) and a second oil port (202); A driving pump (3) connected to the first oil port (201) via a first oil circuit (4) and connected to the second oil port (202) via a second oil circuit (5); The accumulator (6) is arranged on the second oil circuit (5), and a one-way valve (7) and a switch valve (8) are arranged on the second oil circuit (5). The one-way valve (7) is located between the accumulator (6) and the driving pump (3), and the switch valve (8) is located between the accumulator (6) and the hydraulic motor (2).

2. The working machine cooling system according to claim 1, characterized in that: It also comprises an oil tank (9) and a first hydraulically controlled one-way valve (12); the second oil port (202) is connected to the oil tank (9) via an oil return oil circuit (10); the drive pump (3) is connected to the oil return oil circuit (10) via a first hydraulically controlled oil circuit (11); and the first hydraulically controlled one-way valve (12) is located at the connection between the first hydraulically controlled oil circuit (11) and the oil return oil circuit (10).

3. The working machine cooling system according to claim 2, characterized in that: The invention also comprises a second hydraulically controlled one-way valve (15); the first oil circuit (4) is also connected to the oil tank (9) via a third oil circuit (13); the second oil circuit (5) is also connected to the third oil circuit (13) via a second hydraulically controlled oil circuit (14); the second hydraulically controlled one-way valve (15) is located at the connection between the third oil circuit (13) and the second hydraulically controlled oil circuit (14).

4. The working machine cooling system according to claim 3, characterized in that: The driving pump (3) is provided with an oil inlet and an oil outlet, the oil inlet being connected to the oil tank (9) via an oil inlet oil circuit (16), and the oil outlet being connected to the first oil circuit (4).

5. The working machine cooling system according to claim 4, characterized in that: The first oil circuit (4) is also connected to the second oil circuit (5).

6. The working machine cooling system according to claim 2, characterized in that: The hydraulic motor (2) is also provided with an oil drain port, and the oil drain port is connected to the oil tank (9) via an oil drain oil circuit (17).

7. The working machine cooling system according to any one of claims 1 to 6, characterized in that: It also includes a controller (18), which is electrically connected to the switch valve (8) and is used to control the opening and closing of the switch valve (8).

8. The working machine cooling system according to claim 7, characterized in that: It also includes an operation button (19), wherein the operation button (19) is used to send an operation instruction, and the controller (18) is electrically connected to the operation button (19) and is used to receive the operation instruction to control the opening and closing of the switch valve (8).

9. The working machine cooling system according to claim 8, characterized in that: It also includes a display screen (20), the operation button (19) is a touch button arranged on the display screen (20), and the display screen (20) is electrically connected to the controller (18).

10. A working machine, characterized in that: include: Radiator (21); A working machine cooling system according to any one of claims 1 to 9.

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