Cooling system and excavator
By combining a circulating pressure stabilizing component and auxiliary cooling components, the problem of radiator damage caused by the large return oil flow of ultra-large excavators was solved, achieving radiator protection and improved heat dissipation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-04-03
AI Technical Summary
The large return oil flow of ultra-large excavators leads to high pressure impact on the radiator's return oil, making it prone to cracking and oil leakage.
The impact pressure of the oil is controlled by a circulating pressure stabilizing component, which includes a pressure relief component and an overflow component. The overflow restricts the oil flow and pressure, and combined with auxiliary cooling components, it accelerates heat dissipation and forms a stable heat dissipation circuit.
It reduces the impact pressure of the oil on the heat dissipation components, protects the radiator, extends its service life, and improves heat dissipation efficiency.
Smart Images
Figure CN224078283U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heat dissipation technology for work equipment, and more particularly to a heat dissipation system and an excavator. Background Technology
[0002] In hydraulic excavators, hydraulic equipment is often used to drive and control actuators. To prevent the hydraulic oil temperature from getting too high, it is necessary to cool the hydraulic oil.
[0003] In related technologies, the hydraulic oil cooling method is as follows: the return hydraulic oil of the actuator directly enters the radiator, is cooled by the radiator, and then returns to the oil tank.
[0004] However, for ultra-large excavators, the return oil flow is large (such as reaching several thousand liters of instantaneous flow), which puts a great impact on the return oil pressure of the radiator, making the radiator prone to cracking and oil leakage. Utility Model Content
[0005] This application provides a cooling system and an excavator to solve the problem in the prior art where the large return oil flow of the excavator causes a large impact on the return oil pressure of the radiator, which easily leads to cracking and oil leakage of the radiator.
[0006] To achieve the above objectives, the technical solution of this application is as follows:
[0007] On one hand, this application provides a heat dissipation system, including: a circulating pressure stabilizing component having an inlet and an outlet, the inlet being used to communicate with a first cavity of a liquid storage tank; a heat dissipation component having an outlet communicating with the heat dissipation component, the heat dissipation component being used to communicate with a second cavity of the liquid storage tank; a pressure relief component being used to relieve pressure on the oil flowing out of the first cavity of the liquid storage tank and drive the oil to the heat dissipation component, the heat dissipation component being used to cool the oil and deliver it to the second cavity of the liquid storage tank.
[0008] In one possible implementation, the heat dissipation system in this application embodiment includes a pressure relief component and an overflow component. The pressure relief component has an inlet and an outlet to correspondingly form the inlet and outlet of the circulating pressure stabilizing component. The overflow component has an overflow inlet and an overflow outlet. The overflow inlet is connected to the outlet of the pressure relief component. Both the overflow outlet and the inlet of the pressure relief component are connected to the first cavity of the liquid storage tank. When the pressure value of the pressure relief component is greater than a preset value, the oil flowing out from the pressure relief component flows into the overflow component through the overflow inlet and then into the first cavity of the liquid storage tank through the overflow outlet.
[0009] In one possible implementation, the heat dissipation system in this application embodiment includes a pressure relief component comprising a first driving component and a circulating pump. The inlet of the circulating pump is connected to a liquid storage tank, and the outlet of the circulating pump is connected to the heat dissipation component. The first driving component is used to drive the circulating pump so that the oil flowing out of the liquid storage tank flows to the heat dissipation component via the circulating pump.
[0010] In one possible implementation, the heat dissipation system in this application embodiment includes a first driving component comprising a driving pump and a circulating motor. The driving pump is connected to the circulating motor, and the circulating motor is coaxially connected to the circulating pump. The driving pump is used to drive the circulating motor to rotate the circulating pump, so that the oil flowing out of the storage tank is flowed to the heat dissipation component via the circulating pump.
[0011] In one possible implementation, the heat dissipation system in this application embodiment has an overflow inlet connected to the passage between the circulating motor and the circulating pump, and an overflow outlet connected to the first cavity of the liquid storage tank.
[0012] In one possible implementation, the heat dissipation system in this application embodiment uses an overflow valve as the overflow component.
[0013] In one possible implementation, the heat dissipation system in this application embodiment further includes an auxiliary cooling component, which is used to generate airflow toward the heat dissipation component.
[0014] In one possible implementation, the heat dissipation system in this application embodiment includes an auxiliary cooling component comprising a cooling pump, a cooling motor, and a cooling fan connected in sequence. The cooling pump drives the cooling motor to rotate, thereby causing the cooling fan to generate airflow toward the heat dissipation component.
[0015] In one possible implementation, the heat dissipation system in this application embodiment further includes a second driving component, and the circulating voltage regulator component and the auxiliary cooling component are both connected to the second driving component. The second driving component is used to drive the circulating voltage regulator component and the auxiliary cooling component to operate synchronously.
[0016] On the other hand, this application provides an excavator, including a body and a heat dissipation system as described in any of the above embodiments disposed on the body.
[0017] The cooling system and excavator provided in this application include a circulating pressure stabilizing component with an inlet and an outlet. The inlet connects to the first chamber of a reservoir. A heat sink connects to the outlet and is connected to the second chamber of the reservoir. The circulating pressure stabilizing component depressurizes the oil flowing out of the first chamber and drives the depressurized oil to the heat sink. The heat sink cools the oil and delivers it to the second chamber of the reservoir. In actual use, the actuator connects to the first and second chambers via pipelines. High-temperature oil (such as hydraulic oil return) flows into the first chamber. The circulating pressure stabilizing component, positioned between the heat sink and the reservoir, drives the oil from the first chamber through the component, into the heat sink for cooling, and then into the second chamber. Finally, the cooled oil flows from the second chamber back into the actuator through pipelines. By controlling the impact pressure of the oil through the circulating pressure regulating component (such as when the return oil flow of the actuator surges, the circulating pressure regulating component limits the flow and pressure of the oil through overflow), the circulating pressure regulating component plays the role of buffering, depressurizing and stabilizing, thereby reducing the impact pressure of the oil on the heat sink, thus protecting the heat sink and extending the service life of the oil. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0019] Figure 1 Schematic diagram of the heat dissipation system provided in the embodiments of this application Figure 1 ;
[0020] Figure 2 Schematic diagram of the heat dissipation system provided in the embodiments of this application Figure 2 .
[0021] Explanation of reference numerals in the attached figures:
[0022] 100-liquid storage tank;
[0023] 200-Cyclic Voltage Regulator Component;
[0024] 210 - First driving component; 211 - Drive pump; 212 - Circulation motor;
[0025] 220-Circulation Pump;
[0026] 230 - Overflow component;
[0027] 300 - Heat sink;
[0028] 400 - Auxiliary cooling components; 410 - Cooling pump; 420 - Cooling motor; 430 - Cooling fan;
[0029] 500 - Second drive unit.
[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0032] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and are not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.
[0033] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0035] In excavators, hydraulic equipment is often used to drive and control actuators. To prevent the hydraulic oil temperature from getting too high, it is necessary to cool the hydraulic oil.
[0036] In existing technology, the hydraulic oil cooling method is as follows: the return oil from the actuator directly enters the radiator, is cooled by the radiator, and then returns to the oil tank. However, for ultra-large excavators, the return oil flow rate is large (e.g., it can reach several thousand liters of instantaneous flow rate), which puts a large impact on the return oil pressure of the radiator, making it prone to cracking and oil leakage.
[0037] In view of this, embodiments of this application provide a heat dissipation system and an excavator. The heat dissipation system includes: a circulating pressure stabilizing component having an inlet and an outlet, the inlet of which is connected to a first cavity of a reservoir; and a heat sink, the outlet of which is connected to the heat sink, which is connected to a second cavity of the reservoir. The circulating pressure stabilizing component depressurizes the oil flowing out of the first cavity of the reservoir and drives the oil to the heat sink, which cools the oil and delivers it to the second cavity of the reservoir. In actual use, the actuator is connected to the first and second cavities via pipelines. The high-temperature oil (such as hydraulic oil return) of the actuator flows into the first cavity. The circulating pressure stabilizing component, positioned between the heat sink and the reservoir, drives the oil from the first cavity of the reservoir, through the circulating pressure stabilizing component, into the heat sink for heat dissipation or cooling, and then into the second cavity of the reservoir. Finally, the cooled oil flows back from the second cavity into the actuator via pipelines. By controlling the impact pressure of the oil through the circulating pressure regulating component (such as when the return oil flow of the actuator surges, the circulating pressure regulating component limits the flow and pressure of the oil through overflow), the circulating pressure regulating component plays the role of buffering, depressurizing and stabilizing, thereby reducing the impact pressure of the oil on the heat sink, thus protecting the heat sink and extending the service life of the oil.
[0038] The following is combined Figures 1 to 2 The present application will be described in detail with reference to specific embodiments.
[0039] On one hand, this application provides a heat dissipation system, including: a circulating pressure stabilizing component 200, the circulating pressure stabilizing component 200 having an inlet and an outlet, the inlet of the circulating pressure stabilizing component 200 being used to communicate with a first cavity of a liquid storage tank 100; and a heat sink 300, the outlet of the circulating pressure stabilizing component 200 being connected to the heat sink 300, the heat sink 300 being used to communicate with a second cavity of the liquid storage tank 100, the circulating pressure stabilizing component 200 being used to depressurize the oil flowing out of the first cavity of the liquid storage tank 100 and drive the oil to the heat sink 300, the heat sink 300 being used to cool the oil and deliver it to the second cavity of the liquid storage tank 100.
[0040] The reservoir 100 (such as an oil tank) is used to store hydraulic oil that needs to be cooled. In hydraulic drive equipment, the actuator delivers the return hydraulic oil to the reservoir via oil pipes. The reservoir 100 also serves to receive the cooled oil.
[0041] The circulating pressure stabilizing assembly 200 includes a pressure relief component and an overflow component 230. The pressure relief component drives the oil in the first chamber to flow to the heat sink 300. The overflow component 230 is used to control the flow rate of the oil to control the impact pressure of the oil. This application does not limit the structure of the overflow component 230; for example, the overflow component 230 can be an overflow valve or a pressure reducing valve. This application controls the impact pressure of the oil through the circulating pressure stabilizing assembly 200, so that the impact pressure of the oil on the heat sink 300 is less than the impact pressure of the circulating pressure stabilizing assembly 200. For example, when the return oil flow of the actuator surges, the circulating pressure stabilizing assembly (such as an overflow valve) bypasses the flow path to allow some hydraulic oil to flow to the first chamber of the reservoir 100, ensuring that the inlet pressure of the heat sink 300 is stable below the safety threshold, thereby avoiding damage to the heat sink 300 caused by high-pressure impact.
[0042] It should be noted that, since the return oil from the actuator contains a high amount of heat, the reservoir 100 can be divided into two chambers. For example, the reservoir 100 may have a first chamber and a second chamber. The first chamber is used to hold hydraulic oil with higher heat content, such as the return oil from the actuator. The second chamber is used to hold hydraulic oil that has been cooled or refrigerated, such as hydraulic oil that has been cooled or refrigerated by the heat sink 300, so that it can flow back into the actuator to complete a certain execution task during the next operation. For example, the inlet of the first chamber is connected to the return oil port of the actuator, the outlet of the first chamber is connected to the inlet of the circulating pressure stabilizing component 200, the outlet of the circulating pressure stabilizing component 200 is connected to the inlet of the heat sink 300, the outlet of the heat sink 300 is connected to the inlet of the second chamber, and the outlet of the second chamber is connected to the oil inlet of the actuator.
[0043] Of course, this application does not limit the structure of the heat sink 300. The heat sink 300 can be a heat sink, and the circulating voltage regulator 200 can be a circulating pump 220.
[0044] The hydraulic oil cooling path is as follows: after the return oil from the actuator enters the reservoir 100, it sequentially passes through the circulating pressure stabilizing assembly 200 and the heat sink 300 before returning to the reservoir 100. For example, the return oil from the actuator directly enters the first chamber of the reservoir 100, is drawn from the first chamber by the circulating pump 220, and enters the heat sink 300 through the oil pipe. After being cooled or cooled by the heat sink 300, the oil returns to the second chamber of the reservoir 100 through the oil pipe.
[0045] In this embodiment of the heat dissipation system, a circulating pressure stabilizing component 200 is disposed between the heat sink 300 and the liquid storage tank 100. The oil flows from the first chamber of the liquid storage tank 100, through the circulating pressure stabilizing component 200, into the heat sink 300 for heat dissipation or cooling, and then flows into the second chamber of the liquid storage tank 100. The circulating pressure stabilizing component 200 controls the impact pressure of the oil on the heat sink 300, so that the impact pressure of the oil on the heat sink 300 is less than the impact pressure of the circulating pressure stabilizing component 200, thereby reducing the impact of the oil on the heat sink 300, avoiding damage to the heat sink 300 caused by high pressure impact, thus protecting the heat sink 300 and extending its service life.
[0046] In one possible implementation, the heat dissipation system in this application embodiment includes a pressure relief component 200 and an overflow component 230. The pressure relief component has an inlet and an outlet to correspond to the inlet and outlet of the circulating pressure relief component 200. The overflow component 230 has an overflow inlet and an overflow outlet. The overflow inlet is connected to the outlet of the pressure relief component. Both the overflow outlet and the inlet of the pressure relief component are connected to the first cavity of the liquid storage tank 100. When the pressure value of the pressure relief component is greater than a preset value, the oil flowing out from the pressure relief component flows into the overflow component 230 through the overflow inlet and into the first cavity of the liquid storage tank 100 through the overflow outlet.
[0047] Understandably, the pressure relief component drives the oil in the first chamber to flow to the heat dissipation component 300, and the overflow component 230 is used to control the flow rate of the oil in order to control the impact pressure of the oil.
[0048] It should be noted that this application does not limit the connection method between the overflow component 230 and the pressure relief component. For example, the overflow component 230 can be connected to the inlet of the pressure relief component to limit the inlet pressure of the oil on the circulating pressure stabilizing component 200. The overflow component 230 can also be connected to the outlet of the pressure relief component to limit the outlet pressure of the oil on the circulating pressure stabilizing component 200.
[0049] In addition, the pressure relief component can be equipped with an accumulator or a multi-stage pressure regulating device to further absorb hydraulic shock energy and protect the heat sink 300.
[0050] In one possible implementation, the heat dissipation system in this application embodiment includes a pressure relief component comprising a first driving component 210 and a circulation pump 220. The inlet of the circulation pump 220 is connected to the liquid storage tank 100, and the outlet of the circulation pump 220 is connected to the heat dissipation component 300. The first driving component 210 is used to drive the circulation pump 220 so that the oil flowing out of the liquid storage tank 100 flows to the heat dissipation component 300 via the circulation pump 220.
[0051] The first driving component 210 can be a motor, which drives the circulating pump 220 to operate. The return oil from the actuator flows into the reservoir 100. The circulating pump 220, driven by the motor, delivers hydraulic oil from the reservoir 100 to the heat sink 300. During this process, the overflow component 230 installed in the outlet pipe of the circulating pump 220 directly limits the pressure of the hydraulic oil, keeping the inlet pressure P1 of the heat sink 300 within a safe threshold. The hydraulic oil cooled by the heat sink 300 returns to the reservoir 100 through the pipeline, completing the cooling of the hydraulic oil.
[0052] It should be noted that the displacement of the circulating pump 220 can be selected according to the maximum return oil flow rate, and a large-capacity buffer space is configured in the first chamber to prevent instantaneous flow overload.
[0053] The high-temperature return oil in the first chamber is driven by the circulating pump 220 to the heat sink 300 for cooling, and then flows into the second chamber for the actuator to circulate, forming a heat dissipation circuit for circulating heat dissipation.
[0054] The overflow component 230 (such as an overflow valve) works in conjunction with the circulating pump 220. When the return oil flow of the actuator surges, causing the pressure in the first chamber to rise, the overflow valve automatically opens to bypass the oil, ensuring that the inlet pressure of the heat sink 300 remains stable within the safe threshold, thus preventing the radiator from cracking due to high pressure impact.
[0055] In one possible implementation, the heat dissipation system in this application embodiment includes a first driving component 210 comprising a driving pump 211 and a circulating motor 212. The driving pump 211 is connected to the circulating motor 212, and the circulating motor 212 is coaxially connected to the circulating pump 220. The driving pump 211 drives the circulating motor 212 to rotate the circulating pump 220, so that the oil flowing out of the storage tank 100 flows to the heat dissipation component 300 via the circulating pump 220.
[0056] The circulating pressure stabilizing assembly 200 includes a drive pump 211, a circulating motor 212, and a circulating pump 220. The oil suction port of the drive pump 211 is connected to the first chamber of the reservoir 100, and the outlet of the drive pump 211 is connected to the oil inlet of the circulating motor 212 through a pipeline. The circulating pump 220 and the circulating motor 212 are rigidly connected coaxially.
[0057] Understandably, the drive pump 211 drives the circulation motor 212 to rotate, which in turn drives the coaxial circulation pump 220 to rotate, making the power transmission direct and efficient, reducing energy loss in intermediate links. The circulation pump 220 can stably deliver the oil flowing out of the reservoir 100 to the heat sink 300.
[0058] In one possible implementation, the heat dissipation system in this application embodiment has an overflow inlet of the overflow component 230 connected to the passage between the circulating motor 212 and the circulating pump 220, and an overflow outlet of the overflow component 230 connected to the first cavity of the liquid storage tank 100.
[0059] For example, the overflow component 230 is provided on the pipeline between the oil inlet of the circulating motor 212 and the oil outlet of the drive pump 211 to limit the inlet pressure P2 of the circulating motor 212.
[0060] When the system pressure rises abnormally, the overflow component 230 opens, draining excess oil back into the first chamber of the reservoir 100, preventing the heat sink 300 from being damaged due to excessive pressure, thus protecting the heat sink 300 and extending its service life.
[0061] In one possible implementation, the overflow component 230 in the heat dissipation system of this application embodiment is an overflow valve.
[0062] The overflow valve is used to limit the inlet pressure of the circulating motor 212, thereby indirectly constraining the upper limit of the inlet pressure of the heat sink 300 and preventing the heat sink 300 from being subjected to excessive pressure.
[0063] In one possible implementation, the heat dissipation system in this application embodiment further includes an auxiliary cooling component 400, which is used to generate airflow toward the heat dissipation component 300, thereby accelerating the heat dissipation of the oil in the heat dissipation component 300, improving heat dissipation efficiency, and better meeting the heat dissipation needs of the heat dissipation system under different operating conditions.
[0064] In this embodiment of the heat dissipation system, the auxiliary cooling component 400 includes a cooling pump 410, a cooling motor 420 and a cooling fan 430 connected in sequence. The cooling pump 410 is used to drive the cooling motor 420 to rotate so that the cooling fan 430 generates airflow toward the heat dissipation component 300.
[0065] The oil inlet of the cooling pump 410 is connected to the first chamber of the liquid storage tank 100, and the outlet of the cooling pump 410 is connected to the oil inlet of the cooling motor 420. The output shaft of the cooling motor 420 is coaxially connected to the cooling fan 313. The oil inlet of the heat sink 300 is connected to the circulation pump 220 through an oil pipe, and the oil outlet is connected to the second chamber of the liquid storage tank 100 through an oil pipe.
[0066] The air-cooling process of the auxiliary cooling component 400 is as follows: the cooling pump 410 draws oil from the first chamber of the liquid reservoir 100 and outputs high-pressure oil to drive the cooling motor 420 to rotate. This, in turn, drives the cooling fan 430 to rotate, allowing airflow to pass through the heat sink 300. If the airflow passes through the fins of the heat sink 300, it accelerates the cooling of the oil (such as hydraulic oil). It should be noted that the heat sink 300 and the cooling fan 430 are positioned opposite each other, allowing the airflow to pass perpendicularly through the heat sink 300. Alternatively, an angle can be set between the heat sink 300 and the cooling fan 430, allowing the airflow to pass through the heat sink 300 at an angle.
[0067] In one possible implementation, the heat dissipation system in this application embodiment further includes a second driving component 500, and the circulating voltage regulator component 200 and the auxiliary cooling component 400 are all connected to the second driving component 500. The second driving component 500 is used to drive the circulating voltage regulator component 200 and the auxiliary cooling component 400 to operate synchronously.
[0068] The second drive unit 500 can be an engine, which simultaneously drives the cooling pump 410 and the drive pump 211 to rotate coaxially via a coupling.
[0069] The second drive unit 500, such as the engine, simultaneously drives the cooling pump 410 and the drive pump 211 to rotate coaxially via a coupling, realizing the synchronous operation of the circulating pressure stabilizing component 200 and the auxiliary cooling component 400, reducing equipment usage, saving costs, and reducing the space occupied.
[0070] The engine rotation simultaneously drives the cooling pump 410 and the drive pump 211 to rotate coaxially, thus supplying oil to the cooling motor 420. The engine also causes the drive pump 211 to rotate, supplying oil to the circulation motor 212. Since the circulation motor 212 and the circulation pump 220 are coaxial, the rotational torque of the circulation motor 212 is directly transmitted to the circulation pump 220. Their displacements are V2 and V1, respectively.
[0071] The relationship between the inlet pressure of the heat sink 300 and the inlet pressure of the circulating motor 212 is satisfied as follows:
[0072] P1 < P2 × V2 / V1,
[0073] Wherein, V1 is the displacement of the circulating pump 220, V2 is the displacement of the circulating motor 212, P1 is the inlet pressure of the heat sink 300, and P2 is the inlet pressure of the circulating motor 212.
[0074] On the other hand, this application provides an excavator, including a body and a heat dissipation system as described in any of the above embodiments disposed on the body.
[0075] For example, the engine 400, drive pump 211, and coolant pump 410 are mounted coaxially in parallel, serving as the power input for the excavator's cooling system. The circulating motor 212 and circulating pump 220 are arranged coaxially and positioned close to the coolant tank 100 to shorten the oil intake path, improve the response speed of the cooling system, and enable the excavator's cooling system to better adapt to the excavator's working environment and operating conditions, ensuring the excavator's normal operation.
[0076] It should be noted that the engine 400, as a power source, drives the drive pump 211 and the cooling pump 410. The drive pump 211 outputs hydraulic oil to the circulation motor 212, driving the circulation motor 212 to rotate. The circulation motor 212 directly drives the circulation pump 220 through a coaxial connection. The circulation pump 220 draws high-temperature hydraulic oil from the hot oil zone of the reservoir 100 and pumps it to the radiator 300. The radiator 300 cools the high-temperature hydraulic oil and then returns it to the reservoir 100, completing the circulation cooling process. Meanwhile, the cooling pump 410 draws oil from the reservoir 100 and outputs high-pressure oil to the cooling motor 420, driving the cooling motor 420 to rotate. The cooling motor 420 drives the cooling fan 430 to rotate, causing the cooling fan 430 to generate forced airflow, which blows towards the radiator 300, accelerating the dissipation of heat from the hydraulic oil. In this application, the engine 400 simultaneously drives the cooling pump 410 and the drive pump 211 through a shaft connection, achieving a dual-circuit power distribution.
[0077] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0078] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A heat dissipation system, characterized by, The application relates to a heat dissipation system. The heat dissipation system comprises a circulating pressure stabilizing assembly having an inlet and an outlet, the circulating pressure stabilizing assembly inlet being used for communicating with a first cavity of a liquid storage tank; a heat dissipation member, the circulating pressure stabilizing assembly outlet being used for communicating with the heat dissipation member, the heat dissipation member being used for communicating with a second cavity of the liquid storage tank, the circulating pressure stabilizing assembly being used for relieving pressure of oil liquid flowing out of the first cavity of the liquid storage tank and driving the oil liquid after pressure relief to the heat dissipation member, the heat dissipation member being used for cooling the oil liquid and conveying the oil liquid to the second cavity of the liquid storage tank. The circulating pressure stabilizing assembly comprises a pressure relief member and an overflow member, the pressure relief member having an inlet and an outlet corresponding to the inlet and the outlet of the circulating pressure stabilizing assembly, the outlet of the pressure relief member being used for communicating with the heat dissipation member; the overflow member having an overflow inlet and an overflow outlet, the overflow inlet being used for communicating with the outlet of the pressure relief member, the overflow outlet and the inlet of the pressure relief member being used for communicating with the first cavity of the liquid storage tank.
2. The heat dissipation system of claim 1, wherein, When the pressure value of the pressure relief member is greater than a preset value, the oil liquid flowing out of the pressure relief member flows into the overflow member through the overflow inlet and flows into the first cavity of the liquid storage tank through the overflow outlet. The pressure relief member comprises a first driving member and a circulating pump, the inlet of the circulating pump being used for communicating with the liquid storage tank, the outlet of the circulating pump being connected with the heat dissipation member; the first driving member being used for driving the circulating pump so as to drive the oil liquid flowing out of the liquid storage tank to flow to the heat dissipation member through the circulating pump.
3. The heat dissipation system of claim 2, wherein, The first driving member comprises a driving pump and a circulating motor, the driving pump being connected with the circulating motor, the circulating motor being coaxially connected with the circulating pump, the driving pump being used for driving the circulating motor so that the circulating motor drives the circulating pump to rotate, thereby driving the oil liquid flowing out of the liquid storage tank to flow to the heat dissipation member.
4. The heat dissipation system of claim 3, wherein, The overflow inlet of the overflow member is used for communicating with a passage between the circulating motor and the circulating pump, and the overflow outlet of the overflow member is used for communicating with the first cavity of the liquid storage tank.
5. The heat dissipation system of claim 4, wherein, The overflow member is an overflow valve.
6. The heat dissipation system according to any one of claims 2-5, wherein, The heat dissipation system further comprises an auxiliary cooling member, the auxiliary cooling member being used for generating air flow towards the heat dissipation member.
7. The heat dissipation system according to any one of claims 1-5, wherein, The auxiliary cooling member comprises a cooling pump, a cooling motor and a heat dissipation fan connected in sequence, the cooling pump being used for driving the cooling motor to rotate so that the heat dissipation fan generates air flow towards the heat dissipation member.
8. The heat dissipation system of claim 7, wherein, The heat dissipation system further comprises a second driving member, the circulating pressure stabilizing assembly and the auxiliary cooling member being connected with the second driving member, the second driving member being used for driving the circulating pressure stabilizing assembly and the auxiliary cooling member to operate synchronously.
9. The heat dissipation system of claim 7, wherein, The heat dissipation system comprises a body and the heat dissipation system according to any one of claims 1-9 arranged on the body.
10. An excavator characterized by comprising: