Composite heat dissipation device for hydraulic system

Abstract

The utility model discloses a composite heat dissipation device for a hydraulic system, which comprises an oil storage bin, one end of the oil storage bin is hermetically connected with an oil outlet bin, and the other end of the oil storage bin is provided with an oil inlet bin; a heat conduction pipe is arranged at the bottom of the oil outlet bin, a connecting pipe is arranged at the joint of the oil outlet bin and the oil storage bin and is of an inverted-U-shaped structure, the end, located on the inner side of the oil storage bin, of the connecting pipe is located below the liquid level, and an electromagnetic valve is arranged at the end, located on the inner side of the oil outlet bin, of the connecting pipe. A circulation shell and a flow dividing mechanism are arranged on the inner side of the oil inlet bin, and a second fan is arranged on the oil inlet bin. The oil inlet bin and the oil outlet bin are arranged on the two sides of the oil storage bin respectively, the corresponding heat dissipation and cooling structures are arranged on the oil inlet bin and the oil outlet bin, and cooling and heat dissipation can be conducted on hydraulic oil flowing through the oil storage bin when the oil storage bin works. And the amount of hydraulic oil flowing through the oil inlet bin and the oil outlet bin in unit time is small, so that cooling treatment of the hydraulic oil can be effectively realized.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, specifically to a composite heat dissipation device for hydraulic systems. Background Technology

[0002] In modern industrial production, hydraulic systems are widely used in numerous fields such as engineering machinery, aerospace, metallurgical machinery, and machine tools due to their significant advantages, including high power density, fast response speed, high control precision, and ease of overload protection. However, during operation, hydraulic systems inevitably generate a large amount of heat due to factors such as the work done by the hydraulic pump, friction generated by the hydraulic oil flowing through pipelines and components, and mechanical energy loss of the actuators. If this heat cannot be dissipated in a timely and effective manner, it will seriously affect the performance and reliability of the hydraulic system.

[0003] For example, the viscosity of hydraulic oil is inversely proportional to temperature; as oil temperature increases, viscosity decreases significantly. Lower viscosity leads to easier leakage of oil in the gaps between hydraulic components, affecting the system's volumetric efficiency and operational accuracy. It also deteriorates the lubrication performance of the hydraulic oil, increasing wear between components. Furthermore, high temperatures greatly accelerate the oxidation process of hydraulic oil. Oxidation darkens the oil's color, increases its acid value, and generates harmful substances such as sludge and deposits. These substances clog filters, pipes, and the orifices of hydraulic components, affecting normal system operation and further reducing the oil's lubrication and heat dissipation performance, shortening its service life. Additionally, as temperature rises, the solubility of air in hydraulic oil decreases, causing dissolved air to precipitate and form bubbles. These bubbles flow with the hydraulic system and rapidly collapse when entering high-pressure areas, generating localized high temperatures and pressure impacts, triggering cavitation and causing severe damage to hydraulic components. Moreover, additives in hydraulic oil, such as anti-wear agents, antioxidants, and rust inhibitors, decompose and fail more rapidly at high temperatures. When additives fail, hydraulic oil can no longer maintain good performance, cannot effectively protect hydraulic components, and reduces the reliability and stability of the system.

[0004] Therefore, it is necessary to dissipate heat from the hydraulic oil during the operation of the hydraulic system. From the perspective of existing heat dissipation technologies, air cooling and water cooling are two common methods. Air cooling systems have a relatively simple structure, mainly using a fan to drive airflow and remove heat from the hydraulic oil lines or radiator surface. However, the heat dissipation efficiency of air cooling systems is greatly affected by ambient temperature. In high-temperature environments, such as when the ambient temperature exceeds 35℃, the temperature difference between the air and the hydraulic oil decreases, and the heat exchange efficiency drops significantly. According to relevant experimental data, the heat dissipation efficiency of air-cooled radiators can decrease by more than 40% at this time. Water cooling systems, on the other hand, utilize heat exchange between the coolant and the hydraulic oil to achieve heat dissipation, resulting in higher heat dissipation efficiency. However, water cooling systems have significant limitations; their operation depends on a stable external water supply. In field operations, water-scarce areas, or workplaces without water supply, water cooling systems will not function properly, greatly limiting their application range. Utility Model Content

[0005] The purpose of this invention is to provide a composite heat dissipation device for hydraulic systems, which aims to improve the poor performance of individual air cooling or water cooling methods for hydraulic systems.

[0006] This utility model is implemented as follows: A composite heat dissipation device for a hydraulic system includes a power element and a control element. An oil storage tank is provided below the power element and the control element. An oil outlet tank is sealed and connected to one end of the oil storage tank, and an oil inlet tank is provided at the other end of the oil storage tank. A heat conduction pipe is provided at the bottom of the oil outlet tank, and a connecting pipe is provided at the junction of the oil outlet tank and the oil storage tank. The connecting pipe is configured with an inverted U-shaped structure. One end of the connecting pipe located inside the oil storage tank is below the liquid surface, and a solenoid valve is provided at the end of the connecting pipe located inside the oil outlet tank. A flow shell and a flow diversion mechanism are provided inside the oil inlet tank, and a second fan is provided on the oil inlet tank. One end of the flow shell is connected to the flow diversion mechanism, and the other end of the flow shell is connected to the oil storage tank. A semiconductor cooling chip is provided on the side wall of the flow shell.

[0007] Preferably, a plurality of through holes are provided at one end of the bottom of the oil outlet, and a splicing shell is provided at the other end of the bottom of the oil outlet, and a plurality of through holes are also provided on the splicing shell, with the end of the heat pipe passing through the through holes.

[0008] Preferably, a baffle is provided at the end of the heat pipe, and a sealing gasket is provided on the surface of the baffle that contacts the oil outlet and the splicing shell; a first fan is provided on the inner side of the splicing shell, and the first fan is positioned directly opposite the heat pipe.

[0009] Preferably, the diversion mechanism includes a connecting pipe, a main pipe, and diversion pipes. The connecting pipe is connected and installed below the oil inlet of the oil tank via a tightening cap. The main pipe is connected and located on the side of the connecting pipe. Multiple diversion pipes are connected and located below the main pipe, and the diversion pipes are configured with a U-shaped structure.

[0010] Preferably, a heat dissipation shell is also provided inside the oil inlet chamber. The heat dissipation shell is sealed on the side of the first heat conduction area of ​​the oil inlet chamber, and coolant is provided in the space formed by the heat dissipation shell and the first heat conduction area. Multiple branch pipes pass through the perforations of the heat dissipation shell. Multiple heat conduction fins are installed on the heat dissipation shell.

[0011] Preferably, the flow shell is configured as a U-shaped structure and is provided with a flow cavity. A converging chamber is connected to the end of the branch pipe away from the main pipe. The converging chamber is sleeved on the end of the flow shell, and the outflow hole at the bottom of the converging chamber is positioned directly opposite the flow cavity.

[0012] Preferably, multiple thermoelectric coolers are distributed in multiple groups, and a limiting plate is provided at the edge of each group of thermoelectric coolers. The limiting plate is set in an L-shaped structure and is attached to the thermoelectric cooler.

[0013] Preferably, a pressure plate is snapped onto the limiting plate, and a stud is fixedly installed on the side wall of the flow shell. The pressure plate is sleeved on the stud, and a nut is threaded onto the end of the stud.

[0014] Preferably, a pull-down plate is fixedly installed on the side of the collection bin, and the pull-down plate is located near a certain limiting plate, with a pressure plate snapping onto the pull-down plate and the limiting plate.

[0015] Preferably, a notch is provided on the side wall of the oil storage tank near the flow shell, the length of the notch is greater than or equal to the length of the flow shell, and the notch is provided through the end of the flow shell away from the collection tank.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model has an oil inlet and an oil outlet on both sides of the oil storage tank, and corresponding heat dissipation structures are provided at the oil inlet and oil outlet to cool the hydraulic oil flowing through it during operation. Furthermore, because the amount of hydraulic oil flowing through the oil inlet and oil outlet per unit time is small, the cooling of the hydraulic oil can be effectively achieved.

[0018] 2. This utility model is equipped with a connecting pipe and a solenoid valve at the end of the connecting pipe. At the same time, the end of the connecting pipe away from the solenoid valve is submerged in the oil reservoir. Therefore, the amount of hydraulic oil in the oil reservoir can be controlled by adjusting the flow of the solenoid valve, which facilitates the cooling of hydraulic oil.

[0019] 3. This utility model is equipped with a flow shell and a distribution pipe, and is also equipped with a fan. The fan can agitate the gas around the flow shell and distribution pipe, and use air cooling to achieve a stable reduction in hydraulic oil temperature. It is also equipped with a semiconductor cooling chip, which can further reduce the temperature of the hydraulic oil through its operation, effectively achieving composite heat dissipation treatment of the hydraulic oil. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a structural schematic diagram of the oil storage tank, oil outlet tank, and oil inlet tank of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the oil storage tank of this utility model;

[0023] Figure 4 This is a schematic diagram of the connecting pipe structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the oil outlet chamber and heat conduction pipe of this utility model;

[0025] Figure 6 This is a schematic diagram of the oil outlet chamber of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the heat pipe of this utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the oil inlet and flow shell of this utility model;

[0028] Figure 9 This is a schematic diagram of the oil inlet tank of this utility model;

[0029] Figure 10 This is a schematic diagram of the flow shell, heat dissipation shell, and flow distribution mechanism of this utility model;

[0030] Figure 11 This is a schematic diagram of the structure of the heat dissipation shell of this utility model;

[0031] Figure 12 This is a first structural schematic diagram of the circulation shell of this utility model;

[0032] Figure 13 This is a schematic diagram of the second structure of the circulation shell of this utility model;

[0033] Figure 14 This is a schematic diagram of the structure of the limiting plate of this utility model;

[0034] Figure 15 This is a schematic diagram of the diversion mechanism of this utility model;

[0035] Figure 16 This is a schematic diagram of the aggregation bin of this utility model.

[0036] In the diagram: 1. Oil storage tank; 11. Notch; 12. Connecting pipe; 13. Solenoid valve; 2. Oil outlet tank; 21. Heat conduction pipe; 22. Through hole; 23. First fan; 24. Splicing shell; 25. Oil outlet hole; 26. Baffle; 3. Oil inlet tank; 31. Oil inlet; 32. First heat conduction area; 33. Second fan; 4. Flow shell; 41. Flow cavity; 42. Semiconductor cooling chip; 43. Limiting plate; 44. Stud; 45. Pressure plate; 5. Heat dissipation shell; 51. Heat conduction fins; 52. Perforation; 6. Diverting mechanism; 61. Main pipe; 62. Diverting pipe; 63. Connecting pipe; 64. Tightening cap; 65. Converging tank; 66. Pull-down plate; 67. Outlet hole. Detailed implementation method:

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0039] Example 1

[0040] In order to improve the heat dissipation and cooling effect of hydraulic system oil, this embodiment provides a new heat dissipation device for hydraulic system. The heat dissipation device uses air cooling and semiconductor refrigeration to achieve mixed heat dissipation and cooling treatment of oil, which has higher heat dissipation efficiency compared with water cooling and air cooling alone.

[0041] like Figure 1As shown, before introducing the specific scheme of the heat dissipation device, a brief introduction to the publicly available hydraulic system is given here. Specifically, the hydraulic system includes power components, control components, actuators, auxiliary components, and working medium. Power components, such as hydraulic pumps, commonly include gear pumps, vane pumps, and piston pumps, which convert the mechanical energy of the prime mover into the pressure energy of hydraulic oil, providing a power source for the entire hydraulic system. Actuators, such as hydraulic cylinders (achieving linear reciprocating motion) and hydraulic motors (achieving rotary motion), convert hydraulic energy into mechanical energy to drive the load. Control components include pressure control valves, flow control valves, and directional control valves. Auxiliary components include oil tanks (hereinafter referred to as oil reservoir 1), oil filters, oil pipes and pipe fittings, accumulators, and pressure gauges. Oil reservoir 1 is used to support the power components and control components, ensuring their stable installation. The working medium, hydraulic oil, is the medium for transmitting energy and also has functions such as lubrication, cooling, and rust prevention.

[0042] like Figure 1 , Figure 2 As shown, in order to reduce the temperature of the hydraulic oil, the cooling device includes an oil outlet chamber 2 and an oil inlet chamber 3, which are respectively connected to each other at both ends of the oil storage tank 1. The oil outlet chamber 2 is sealed to the oil storage tank 1 by bolts, gaskets, etc., and the oil inlet chamber 3 is installed on the oil storage tank 1 by bolts. The oil outlet chamber 2 and the oil inlet chamber 3 are respectively provided with an oil outlet hole 25 and an oil inlet 31. Pipes connected to the power components and control components are respectively provided at the oil outlet hole 25 and the oil inlet 31. Therefore, during the operation of the hydraulic system, the hydraulic oil is output from the oil storage tank 1, flows through the oil outlet chamber 2, flows into the power components and control components, then flows into the oil inlet chamber 3, and finally flows back to the oil storage tank 1.

[0043] Since the oil storage tank 1 contains a large amount of hydraulic oil, it is not conducive to heat dissipation and cooling. Therefore, corresponding heat dissipation and cooling structures can be set at the oil outlet tank 2 and the oil inlet tank 3. Through their function, the cooling and heat dissipation of the hydraulic oil can be improved.

[0044] like Figure 5 , Figure 6 As shown, in order to cool the hydraulic oil flowing into the outlet chamber 2, a heat-conducting pipe 21 is installed at the bottom of the outlet chamber 2, and a first fan 23 is also installed on the outlet chamber 2, directly facing the heat-conducting pipe 21. Therefore, under the action of the first fan 23, the gas inside and outside the outlet chamber 2 can be drawn through the heat-conducting pipe 21 to achieve heat dissipation and cooling of the heat-conducting pipe 21. Because the hydraulic oil in the outlet chamber 2 is relatively small and accumulates at the bottom of the outlet chamber 2, and the liquid level exceeds the heat-conducting pipe 21, heat can be transferred through the heat-conducting pipe 21 to cool the hydraulic oil, given that the multiple heat-conducting pipes 21 have a large contact area with the hydraulic oil.

[0045] like Figure 6, Figure 7 As shown, to stably install the heat pipe 21 at the bottom of the oil outlet chamber 2, multiple through holes 22 are provided at one end of the bottom of the oil outlet chamber 2, and a splicing shell 24 is bolted to the other end of the bottom of the oil outlet chamber 2. The splicing shell 24 and the oil outlet chamber 2 are in sealed contact through a sealing gasket. Additionally, multiple through holes 22 are also provided on the splicing shell 24. Therefore, when installing the heat pipe 21, the end of the heat pipe 21 passes through the through holes 22. To achieve a sealed contact between the heat pipe 21 and the oil outlet chamber 2, a baffle 26 is provided at the end of the heat pipe 21, and a sealing gasket is provided on the surface of the baffle 26 that contacts the oil outlet chamber 2 and the splicing shell 24.

[0046] like Figure 3 , Figure 4 As shown, in order to inject hydraulic oil into the oil outlet 2 in a timely manner, a connecting pipe 12 is provided at the junction of the oil outlet 2 and the oil storage tank 1. The connecting pipe 12 is designed with an inverted U-shape, with one end of the connecting pipe 12 located inside the oil storage tank 1 and the other end located inside the oil outlet 2. In addition, the end of the connecting pipe 12 located inside the oil storage tank 1 is below the liquid level, while the end of the connecting pipe 12 located inside the oil outlet 2 is always below the hydraulic oil level in the oil storage tank 1. Therefore, the connecting pipe 12 can be used to establish a channel for hydraulic oil flow between the oil outlet 2 and the oil storage tank 1. When the connecting pipe 12 is unobstructed, the hydraulic oil in the oil storage tank 1 can be input into the oil outlet 2. To control the flow of hydraulic oil and ensure a lower volume of hydraulic oil in the outlet chamber 2, a solenoid valve 13 is installed at one end of the connecting pipe 12 inside the outlet chamber 2. The solenoid valve 13 is always positioned below the hydraulic oil level in the storage chamber 1. Therefore, the solenoid valve 13 can control the rate of hydraulic oil output and even whether the hydraulic oil flows at all. A level sensor can also be installed inside the outlet chamber 2 to monitor the hydraulic level in real time and provide a reference for the operation of the solenoid valve 13.

[0047] like Figure 8 , Figure 10 As shown, in order to reduce the temperature of the returning hydraulic oil, a diversion mechanism 6 is provided inside the oil inlet chamber 3, and the inlet end of the diversion mechanism 6 is connected to the oil inlet 31. At the same time, a second fan 33 is provided on the oil inlet chamber 3. Therefore, under the action of the second fan 33, the gas around the diversion mechanism 6 can be agitated, thereby removing the heat of the diversion mechanism 6 and reducing the temperature of the hydraulic oil flowing through the diversion mechanism 6 by utilizing the principle of heat conduction.

[0048] like Figure 15As shown, specifically, the diversion mechanism 6 includes a connecting pipe 63, a main pipe 61, and diversion pipes 62. A tightening cap 64 is fitted onto the connecting pipe 63, thus the connecting pipe 63 is connected and installed below the oil inlet 31 via the tightening cap 64. Two main pipes 61 are respectively connected and arranged on both sides of the connecting pipe 63, and the multiple diversion pipes 62 are divided into two groups, with the two groups of diversion pipes 62 respectively connected and arranged below the two main pipes 61. Therefore, when the gas flows around the diversion pipes 62, it can carry away the heat of the diversion pipes 62, thereby achieving the cooling treatment of the hydraulic oil.

[0049] In order to deliver the hydraulic oil flowing out of the diversion pipe 62 to the oil storage tank 1, the diversion pipe 62 is configured with a U-shaped structure, and the end of the diversion pipe 62 away from the main pipe 61 can extend to the gap 11 of the oil storage tank 1.

[0050] like Figure 10 , Figure 13 As shown, however, in order to further reduce the temperature of the hydraulic oil flowing back into the oil storage tank 1, a flow shell 4 can be provided inside the oil inlet tank 3. The flow shell 4 is U-shaped and has a narrow flow cavity 41 inside. A converging chamber 65 is connected to the end of the branch pipe 62 away from the main pipe 61. The converging chamber 65 is fitted onto the end of the flow shell 4, and the outflow hole 67 at the bottom of the converging chamber 65 is positioned directly opposite the flow cavity 41. Therefore, the hydraulic oil flowing out of the branch pipe 62 flows directly into the flow shell 4. Because the flow cavity 41 is relatively narrow, the hydraulic oil fully contacts the flow shell 4, increasing the contact area between the hydraulic oil and the flow shell 4. Under the action of the second fan 33, the gas around the flow shell 4 is agitated, which can remove the heat from the flow shell 4, thereby reducing the temperature of the hydraulic oil.

[0051] like Figure 12 As shown, a semiconductor cooling chip 42 can also be attached to the outer wall of the flow shell 4. Therefore, the temperature of the flow shell 4 and the hydraulic oil can be effectively reduced under the action of the semiconductor cooling chip 42, especially when the ambient temperature is high. Heat sinks can also be provided on the side of the semiconductor cooling chip 42 to increase the heat dissipation area and accelerate heat dissipation.

[0052] like Figure 13 , Figure 14As shown, to stably mount the thermoelectric cooler 42 onto the flow shell 4, multiple studs 44 are fixedly installed on the side wall of the flow shell 4. These studs 44 are divided into multiple groups, one above the other. Multiple thermoelectric coolers 42 are also divided into multiple groups, with the groups of thermoelectric coolers 42 and studs 44 alternating. A limiting plate 43 is provided on the side of each group of studs 44. The limiting plate 43 has an L-shaped structure and is fitted onto the thermoelectric cooler 42. A pressure plate 45 is snapped onto the limiting plate 43, and the pressure plate 45 is sleeved on the stud 44. A nut is threaded onto the end of the stud 44. Therefore, under the action of the nut, the pressure plate 45 is forced to press against the limiting plate 43, controlling the limiting plate 43 to stably adhere to the thermoelectric cooler 42.

[0053] like Figure 16 As shown, in order to ensure that the convergence chamber 65 is stably and continuously installed on the flow shell 4, a pull-down plate 66 is fixedly installed on the side of the convergence chamber 65. The pull-down plate 66 is located near a certain limiting plate 43, and the pressure plate 45 is snapped onto the pull-down plate 66 and the limiting plate 43.

[0054] In addition, the length of the gap 11 is greater than or equal to the length of the flow shell 4, and the end of the flow shell 4 away from the convergence chamber 65 is set through the gap 11.

[0055] In order to control the operation of the liquid level sensor, solenoid valve 13, fan, and thermoelectric cooler 42, an industrial control computer, power supply module, relays, etc. are also required.

[0056] If the level sensor outputs an analog signal (such as a 4-20mA current signal or a 0-5V voltage signal), a data acquisition card is required. Data acquisition cards typically have an analog input channel, which converts the analog signal output by the sensor into a digital signal, and then connects it to an industrial control computer via interfaces such as PCI or PCIe. For level sensors that output digital signals (such as RS-485, CAN, etc.), they can be directly connected to the industrial control computer through the corresponding communication interface. If the level sensor uses the RS-485 communication protocol, an RS-485 to USB converter can be used to connect the sensor to the industrial control computer's USB interface. After installing the appropriate driver and communication software, the industrial control computer can communicate with the sensor and read data.

[0057] Solenoid valves typically require a large drive current, while industrial control computers generally output weak electrical signals that cannot directly drive the solenoid valve. In such cases, a relay module can be used as an intermediate interface. The industrial control computer outputs a control signal to the relay module through a digital output port (such as a GPIO interface). The relay module then controls the opening and closing of its internal contacts based on this signal, thereby controlling the power supply to the solenoid valve. Some solenoid valve drivers can directly receive control signals from the industrial control computer, amplify and process the signals to drive the solenoid valve. These drivers usually have multiple interface types and can connect to the industrial control computer via serial ports, USB, etc., to achieve precise control of the solenoid valve.

[0058] For fans that support PWM (Pulse Width Modulation) speed control, the PWM output port of the industrial control computer can be directly connected to the fan's PWM control interface. The industrial control computer changes the fan speed by adjusting the duty cycle of the PWM signal, thereby achieving speed control. If the fan does not support PWM speed control, a relay module can be used for control. The industrial control computer outputs a control signal to the relay module through its digital output port. The relay module controls the fan's power supply, thus controlling the fan's start and stop.

[0059] Semiconductor coolers require specific drive circuits to control their operating current and direction to achieve cooling or heating functions. Dedicated semiconductor cooler drive modules can be used. An industrial control computer connects to the drive module via a serial port, USB, or other interface, sending control commands. The drive module adjusts the magnitude and direction of the current output to the semiconductor cooler according to the commands. For precise control of the cooling effect, a temperature sensor can also be used. The temperature sensor feeds back the detected temperature signal to the industrial control computer. Based on the set temperature value and the feedback temperature signal, the industrial control computer adjusts the operating state of the semiconductor cooler through the drive module, achieving closed-loop temperature control.

[0060] Example 2

[0061] like Figure 10 , Figure 11As shown, based on Embodiment 1, a heat dissipation shell 5 can also be provided inside the oil inlet 3. Multiple heat-conducting fins 51 are installed on the heat dissipation shell 5. The heat dissipation shell 5 is sealed on the side of the first heat-conducting area 32 of the oil inlet 3, and coolant is provided within the space formed by the heat dissipation shell 5 and the first heat-conducting area 32. Multiple branch pipes 62 are provided through the perforations 52 of the heat dissipation shell 5. Additionally, a coolant tank and a liquid pump can be provided on the side of the oil inlet 3, and the coolant tank, liquid pump, and heat dissipation shell 5 are connected by pipes. Therefore, under the action of the liquid pump, the coolant is forced to circulate, thereby carrying away the temperature of the branch pipes 62 during the coolant circulation process. Simultaneously, the heat from the heat dissipation shell 5 is carried away when the fan agitates the airflow. A semiconductor cooling chip 42 can also be provided at the first heat-conducting area 32.

[0062] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A composite heat dissipation device for a hydraulic system, comprising an oil storage tank (1), characterized in that, An oil outlet chamber (2) is sealed and connected to one end of the oil storage tank (1), and an oil inlet chamber (3) is provided at the other end of the oil storage tank (1); a heat-conducting pipe (21) is provided at the bottom of the oil outlet chamber (2), and a connecting pipe (12) is provided at the junction of the oil outlet chamber (2) and the oil storage tank (1). The connecting pipe (12) is configured with an inverted U-shaped structure, and one end of the connecting pipe (12) located inside the oil storage tank (1) is below the liquid surface. 12) A solenoid valve (13) is provided at one end inside the oil outlet (2); a flow shell (4) and a diversion mechanism (6) are provided inside the oil inlet (3), and a second fan (33) is provided on the oil inlet (3). One end of the flow shell (4) is connected to the diversion mechanism (6), and the other end of the flow shell (4) is connected to the oil storage tank (1). Meanwhile, a semiconductor cooling chip (42) is provided on the side wall of the flow shell (4).

2. The composite heat dissipation device for a hydraulic system according to claim 1, characterized in that, Multiple through holes (22) are provided at one end of the bottom of the oil outlet (2), and a splicing shell (24) is provided at the other end of the bottom of the oil outlet (2). Multiple through holes (22) are also provided on the splicing shell (24), and the end of the heat pipe (21) is provided through the through holes (22).

3. A composite heat dissipation device for a hydraulic system according to claim 2, characterized in that, A baffle (26) is provided at the end of the heat pipe (21), and a sealing gasket is provided on the surface of the baffle (26) that contacts the oil outlet (2) and the splicing shell (24); a first fan (23) is provided on the inner side of the splicing shell (24), and the first fan (23) is positioned directly opposite the heat pipe (21).

4. A composite heat dissipation device for a hydraulic system according to claim 1, characterized in that, The diversion mechanism (6) includes a connecting pipe (63), a main pipe (61), and diversion pipes (62). The connecting pipe (63) is connected and installed below the oil inlet (31) of the oil inlet tank (3) by a screw cap (64). The main pipe (61) is connected and installed on the side of the connecting pipe (63). Multiple diversion pipes (62) are connected and installed below the main pipe (61), and the diversion pipes (62) are configured as U-shaped structures.

5. A composite heat dissipation device for a hydraulic system according to claim 4, characterized in that, A heat dissipation shell (5) is also provided inside the oil inlet (3). The heat dissipation shell (5) is sealed on the side of the first heat conduction area (32) of the oil inlet (3). Coolant is provided in the space formed by the heat dissipation shell (5) and the first heat conduction area (32). Multiple branch pipes (62) are provided through the perforations (52) of the heat dissipation shell (5). Multiple heat conduction fins (51) are installed on the heat dissipation shell (5).

6. A composite heat dissipation device for a hydraulic system according to claim 4, characterized in that, The flow shell (4) is configured as a U-shaped structure and is provided with a flow cavity (41). A convergence chamber (65) is connected to the end of the branch pipe (62) away from the main pipe (61). The convergence chamber (65) is sleeved on the end of the flow shell (4), and the outflow hole (67) at the bottom of the convergence chamber (65) is set opposite to the flow cavity (41).

7. A composite heat dissipation device for a hydraulic system according to claim 6, characterized in that, The semiconductor cooling chips (42) are distributed in multiple groups, and a limiting plate (43) is provided on the edge of each group of semiconductor cooling chips (42). The limiting plate (43) is configured as an L-shaped structure and is attached to the semiconductor cooling chip (42).

8. A composite heat dissipation device for a hydraulic system according to claim 7, characterized in that, A pressure plate (45) is snapped onto the limiting plate (43), and a stud (44) is fixedly installed on the side wall of the flow shell (4). The pressure plate (45) is sleeved on the stud (44), and a nut is threaded onto the end of the stud (44).

9. A composite heat dissipation device for a hydraulic system according to claim 8, characterized in that, A pull-down plate (66) is fixedly installed on the side of the collection chamber (65). The pull-down plate (66) is located near a certain limiting plate (43). The pressure plate (45) is snapped onto the pull-down plate (66) and the limiting plate (43).

10. A composite heat dissipation device for a hydraulic system according to claim 6, characterized in that, The oil storage tank (1) has a notch (11) on the side wall near the flow shell (4). The length of the notch (11) is greater than or equal to the length of the flow shell (4), and the end of the flow shell (4) away from the collection tank (65) is provided through the notch (11).

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