Hydraulic oil cooling system, method and working machine

Abstract

The application relates to the technical field of engineering machinery, and discloses a hydraulic oil heat dissipation system, a heat dissipation method and engineering machinery. The hydraulic oil heat dissipation system comprises a main oil circuit, a heat dissipation device, an electric control valve group module and a control module; the main oil circuit comprises a working condition detection module and a temperature detection module; the heat dissipation device comprises a plurality of independent heat dissipation zones, and the oil outlet end of each heat dissipation zone is connected to an oil tank; the electric control valve group module comprises an oil inlet and a plurality of oil outlets, the oil inlet is connected to an oil return pipeline of an actuating mechanism, and each oil outlet is connected to a corresponding heat dissipation zone through a second oil return branch; the control module selectively controls the oil inlet of the electric control valve group module and a corresponding number of oil outlets to be conductive according to working condition information and / or the temperature of hydraulic oil. The hydraulic oil heat dissipation system disclosed by the application utilizes a stepped heat dissipation mode to adapt to the current working environment or operating condition of the actuating mechanism, improves heat dissipation efficiency, ensures the continuity of equipment operation, and improves work efficiency.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, specifically to a hydraulic oil cooling system, a cooling method, and engineering machinery. Background Technology

[0002] In the hydraulic systems of construction machinery, the hydraulic oil is usually cooled by a single cooling device. In cold weather, the temperature rises slowly, requiring a long warm-up period before operation, resulting in significant waste of resources and environmental pollution, and posing a certain risk of wear and tear on the machine's hydraulic components. In addition, in hot weather and under continuous high-load operation, the cooling effect is prone to overheating. When the temperature exceeds the upper limit of the construction machinery's design range, it is necessary to shut down for a period of time to cool down, which greatly affects the continuity of operation and reduces work efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a hydraulic oil cooling system, a cooling method, and engineering machinery to solve the problem of poor cooling effect in the prior art.

[0004] To achieve the above objectives, in a first aspect, this application provides a hydraulic oil cooling system, comprising: The main oil circuit connects the actuator and the main oil circuit of the oil tank and includes a working condition detection module and a temperature detection module. The working condition detection module is used to detect the working condition information of the actuator, and the temperature detection module is used to detect the hydraulic oil temperature. The heat dissipation device includes multiple independent heat dissipation zones, and the oil outlet of each heat dissipation zone is connected to a first return oil branch, which is used to deliver hydraulic oil to the oil tank. The electronically controlled valve assembly module includes an oil inlet and multiple oil outlets. The oil inlet is connected to the return oil line of the actuator, and each oil outlet is connected to a corresponding heat dissipation area via a second return oil branch. The control module is configured to selectively connect the oil inlet and a corresponding number of the oil outlets of the electronically controlled valve assembly module based on the operating condition information and / or the hydraulic oil temperature.

[0005] As a further improvement to the above technical solution: In conjunction with the first aspect, in one possible implementation, the operating condition detection module includes a pressure sensor and a flow sensor; The pressure sensor is installed in the main oil circuit and is used to detect the pressure in the main oil circuit; The flow sensor is installed at the oil inlet of the actuator to detect the flow rate of the oil entering the actuator.

[0006] In conjunction with the first aspect, in one possible implementation, the maximum heat dissipation efficiency of each of the heat dissipation zones is different.

[0007] In conjunction with the first aspect, in one possible implementation, each of the heat dissipation zones is provided with at least one independent heat dissipation channel.

[0008] In conjunction with the first aspect, in one possible implementation, the number of heat dissipation channels in at least two of the heat dissipation zones is the same; or The number of heat dissipation channels in the multiple heat dissipation zones increases or decreases sequentially.

[0009] In conjunction with the first aspect, in one possible implementation, the electronically controlled valve group module includes multiple actuators, the number of which corresponds to the number of heat dissipation zones, wherein the inlet of each actuator is connected to the oil inlet, and the outlet of each actuator is connected to the corresponding oil outlet.

[0010] To achieve the above objectives, in a second aspect, this application also provides a hydraulic oil cooling method, the method being applied to the hydraulic oil cooling system according to the above description, and comprising: S100: Obtain the operating condition information of the actuator and divide the operating condition information into low-load operating condition, normal operating condition and high-load operating condition; S200: Under the low-load operating condition, the oil inlet is connected to the first preset number of oil outlets by the electronically controlled valve group module, so that the heat dissipation device operates at the first heat dissipation gradient. S300: Under normal operating conditions, the oil inlet is connected to the second preset number of oil outlets by the electronically controlled valve group module, so that the heat dissipation device operates in the second heat dissipation gradient. S400: Under the high-load operating conditions, the oil inlet is connected to the third preset number of oil outlets through the electronically controlled valve group module, so that the heat dissipation device operates in the third heat dissipation gradient. The heat dissipation efficiencies of the first heat dissipation gradient, the second heat dissipation gradient, and the third heat dissipation gradient are arranged from low to high.

[0011] As a further improvement to the above technical solution: In conjunction with the second aspect, in one possible implementation, step S100 further includes: The current operating condition information of the actuator is determined by the pressure and flow rate of the hydraulic oil in the main oil circuit.

[0012] In conjunction with the second aspect, in one possible implementation, step S100 further includes: S60: Obtain the current hydraulic oil temperature and classify the working environment into extremely cold working environment, normal working environment and extremely hot working environment according to the current hydraulic oil temperature. S70: In the extremely cold working environment, the oil inlet is connected to a fourth preset number of oil outlets by the electronically controlled valve group module, so that the heat dissipation device operates in the fourth heat dissipation gradient. S80: Under the extremely hot working environment, the oil inlet is connected to the fifth preset number of oil outlets by the electronically controlled valve group module, so that the heat dissipation device operates at the fifth heat dissipation gradient. S90: Under the normal working environment, perform step S100; Wherein, the heat dissipation efficiency of the fourth heat dissipation gradient is less than or equal to the heat dissipation efficiency of the first heat dissipation gradient, and the heat dissipation efficiency of the fifth heat dissipation gradient is greater than or equal to the heat dissipation efficiency of the third heat dissipation gradient.

[0013] To achieve the above objectives, in a third aspect, this application also provides an engineering machine, including the hydraulic oil cooling system provided in the first aspect above.

[0014] Compared to existing technologies, the beneficial effects of this application are: This application provides a hydraulic oil cooling system, a cooling method, and engineering machinery. In the hydraulic oil cooling system, the cooling device includes multiple independent cooling zones. The oil outlet of the electronically controlled valve assembly module is connected to the corresponding cooling zone via a second return oil branch. The control module is configured to selectively connect the oil inlet of the electronically controlled valve assembly module to a corresponding number of oil outlets based on operating condition information and / or hydraulic oil temperature. For example, under normal operating conditions, when the actuator is operating at low load, the electronically controlled valve assembly module controls the oil inlet to connect to a first preset number of oil outlets, so that the cooling device operates at a first cooling gradient. When the actuator is operating at normal operating conditions, the electronically controlled valve assembly module controls the oil inlet to connect to a second preset number of oil outlets, so that the cooling device operates at a second cooling gradient. When the actuator is operating at high load, the electronically controlled valve assembly module controls the oil inlet to connect to a third preset number of oil outlets, so that the cooling device operates at a third cooling gradient. The cooling efficiency of the first, second, and third cooling gradients is arranged from low to high. Therefore, the hydraulic oil cooling system provided in this application utilizes a tiered cooling method to adapt to the current working environment or operating conditions of the actuator, makes reasonable use of the cooling device, improves cooling efficiency, ensures the continuity of the work of the construction machinery, and enhances work efficiency.

[0015] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate this application and form part of the specification. They are used together with the following detailed description to explain this application. It should be understood that the following drawings only show some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings: Figure 1 This paper shows a schematic diagram of a hydraulic oil cooling system according to an embodiment of the present application. Figure 2 This paper shows a schematic diagram of the oil circuit structure of the hydraulic oil cooling system provided in an embodiment of this application; Figure 3 A partial flowchart of a hydraulic oil cooling method provided in an embodiment of this application is shown; Figure 4 A partial flowchart of the hydraulic oil cooling method provided in an embodiment of this application is shown.

[0017] Explanation of reference numerals in the attached figures: 100. Main oil circuit; 110. Operating condition monitoring module; 111. Pressure sensor; 112. Flow sensor; 120. Temperature monitoring module; 200. Heat dissipation device; 210. Heat dissipation zone; 211. First heat dissipation zone; 212. Second heat dissipation zone; 213. Third heat dissipation zone; 214. Fourth heat dissipation zone; 220. First oil return branch; 230. Second oil return branch; 300. Electrically controlled valve assembly module; 301. Oil inlet; 302. Oil outlet; 310. Actuating valve; 400. Control module; 500. Actuator; 510. Return oil pipeline; 600, fuel tank. Detailed Implementation

[0018] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the embodiments of this application.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0020] The present application will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0021] Example 1 Please see Figure 1 and Figure 2This embodiment provides a hydraulic oil cooling system that can be used for cooling hydraulic oil in engineering machinery.

[0022] In this embodiment, the hydraulic oil cooling system includes a main oil circuit 100, a cooling device 200, an electronically controlled valve assembly module 300, and a control module 400. The main oil circuit 100 connects the actuator 500 and the oil tank 600, thereby providing hydraulic oil to the actuator 500. The main oil circuit 100 includes a working condition detection module 110 and a temperature detection module 120, wherein the working condition detection module 110 is used to detect the working condition information of the actuator 500 (e.g., real-time detection or intermittent detection), and the temperature detection module 120 is used to detect the hydraulic oil temperature.

[0023] The heat dissipation device 200 includes multiple independent heat dissipation zones 210. The oil outlet of each heat dissipation zone 210 is connected to a first return oil branch 220, which is used to deliver hydraulic oil to the oil tank 600. The electronically controlled valve assembly module 300 includes an oil inlet 301 and multiple oil outlets 302. The oil inlet 301 is connected to the return oil pipeline 510 of the actuator 500, and each oil outlet 302 is connected to the corresponding heat dissipation zone 210 through a second return oil branch 230.

[0024] In some embodiments, the maximum heat dissipation efficiency of each heat dissipation zone 210 may be set to be the same.

[0025] In other embodiments, the maximum heat dissipation efficiency of each heat dissipation zone 210 may be set to be different.

[0026] In some other embodiments, the maximum heat dissipation efficiency of two or more heat dissipation zones 210 in all heat dissipation zones 210 can be set to be the same.

[0027] The control module 400 is configured to selectively connect the oil inlet 301 and the corresponding number of oil outlets 302 of the electronically controlled valve assembly module 300 based on the current operating conditions and / or hydraulic oil temperature.

[0028] Optionally, the control module 400 can be selected as a PLC controller, industrial computer, or industrial PC.

[0029] In this embodiment, the operating condition detection module 110 includes a pressure sensor 111 and a flow sensor 112. The pressure sensor 111 is located in the main oil circuit 100 and is used to detect the pressure of the main oil circuit 100; the flow sensor 112 is located at the oil inlet of the actuator 500 and is used to detect the flow rate of the oil entering the actuator 500.

[0030] Understandably, the actuator 500 operates under various conditions, such as low-load operation, normal operation, and high-load operation. The pressure and flow rate of the hydraulic oil in the main oil circuit 100 differ under different operating conditions. The operating condition can be determined first by the pressure detected by the pressure sensor 111, then the control module 400 determines the required flow rate for heat dissipation, and finally, based on the flow rate detected by the flow sensor 112, the inlet 301 and the corresponding number of outlets 302 of the electronically controlled valve assembly module 300 are selectively connected for adaptive heat dissipation.

[0031] The aforementioned electronically controlled valve module 300 includes multiple actuators 310, the number of which corresponds to the heat dissipation area 210. The inlets of each actuator 310 are connected to the oil inlet 301, and the outlets of each actuator 310 are connected to the corresponding oil outlet 302.

[0032] Optionally, the actuator 310 is a two-position two-way solenoid valve or an electric switching valve.

[0033] The temperature detection module 120 is installed in the oil tank 600 to detect the hydraulic oil temperature in the oil tank 600.

[0034] Optionally, the temperature detection module 120 includes a temperature sensor, a temperature detector, or a temperature probe.

[0035] Furthermore, this embodiment also provides a type of construction machinery, including the hydraulic oil cooling system described above. The construction machinery can be selected from excavators, cranes, rotary drilling rigs, rock drills, or bulldozers, etc.

[0036] It should be understood that the above-mentioned hydraulic oil cooling system can be used in engineering machinery with hydraulic systems. The above is only an example and is not intended to limit the scope of protection of this application.

[0037] Compared to the prior art, in the hydraulic oil cooling system provided in this embodiment, the cooling device 200 includes multiple independent cooling zones 210. The oil outlet 302 of the electronically controlled valve group module 300 is connected to the corresponding cooling zone 210 through the second return oil branch 230. The control module 400 is configured to selectively connect the oil inlet 301 of the electronically controlled valve group module 300 to the corresponding number of oil outlets 302 according to the working condition information and / or hydraulic oil temperature. For example, under normal operating conditions, when the actuator 500 is operating at low load, the oil inlet 301 is connected to a first preset number of oil outlets 302 via the electronically controlled valve module 300, so that the heat dissipation device 200 operates at the first heat dissipation gradient. When the actuator 500 is operating at normal load, the oil inlet 301 is connected to a second preset number of oil outlets 302 via the electronically controlled valve module 300, so that the heat dissipation device 200 operates at the second heat dissipation gradient. When the actuator 500 is operating at high load, the oil inlet 301 is connected to a third preset number of oil outlets 302 via the electronically controlled valve module 300, so that the heat dissipation device 200 operates at the third heat dissipation gradient. The heat dissipation efficiency of the first, second, and third heat dissipation gradients is arranged from low to high.

[0038] Therefore, the hydraulic oil cooling system provided in this embodiment utilizes a stepped cooling method to adapt to the current working environment or operating conditions of the actuator 500, makes reasonable use of the cooling device 200, improves cooling efficiency, ensures the continuity of the work of the construction machinery, and enhances work efficiency.

[0039] Example 2 Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This embodiment provides a hydraulic oil cooling method, which is applied to the hydraulic oil cooling system provided in Embodiment 1 above.

[0040] In this embodiment, the hydraulic oil cooling method includes the following steps: S100: Obtain the operating condition information of actuator 500 and divide the operating condition information into low-load operating condition, normal operating condition and high-load operating condition.

[0041] Specifically, the control module 400 acquires the current operating condition information of the actuator 500 detected by the operating condition detection module 110. Specifically, the current operating condition information of the actuator 500 is determined by the pressure and flow rate of the hydraulic oil in the main oil circuit 100.

[0042] Understandably, the actuator 500 has multiple operating conditions, such as low-load operation, normal operation, and high-load operation. Under different operating conditions, the pressure and flow rate of the hydraulic oil in the main oil circuit 100 are different. The operating condition can be determined first by the pressure detected by the pressure sensor 111, and then the control module 400 can determine the flow rate required for heat dissipation. Finally, based on the flow rate detected by the flow sensor 112, the inlet 301 and the corresponding number of outlets 302 of the electronically controlled valve assembly module 300 are selectively connected to dissipate heat, as described in steps S200 to S400 below.

[0043] S200: Under low-load operating conditions, the oil inlet 301 is connected to the first preset number of oil outlets 302 by the electronically controlled valve group module 300, so that the heat dissipation device 200 operates in the first heat dissipation gradient.

[0044] S300: Under normal operating conditions, the oil inlet 301 is connected to the second preset number of oil outlets 302 by the electronically controlled valve group module 300, so that the heat dissipation device 200 operates in the second heat dissipation gradient.

[0045] S400: Under high-load operating conditions, the oil inlet 301 is connected to the third preset number of oil outlets 302 by the electronically controlled valve group module 300, so that the heat dissipation device 200 is operating in the third heat dissipation gradient.

[0046] The heat dissipation efficiency of the first, second, and third heat dissipation gradients is arranged from low to high, thereby achieving tiered heat dissipation of the hydraulic oil to adapt to the current working environment or operating conditions of the actuator 500, make reasonable use of the heat dissipation device 200, improve heat dissipation efficiency, ensure the continuity of the work of the engineering machinery, and improve work efficiency.

[0047] Furthermore, prior to step S100, the following is also included: S60: Obtain the current hydraulic oil temperature and classify the working environment into extremely cold working environment, normal working environment and extremely hot working environment according to the current hydraulic oil temperature.

[0048] It should be noted that existing technologies suffer from slow temperature rise in cold weather, requiring a long warm-up period before operation, which seriously wastes resources and pollutes the environment, and also poses a certain risk of wear and tear on the hydraulic components of the machine. In addition, in hot weather, the heat dissipation effect is prone to overheating. When the temperature exceeds the upper limit of the design range of the engineering machinery, it is necessary to stop the machine for a period of time to cool down, which greatly affects the continuity of operation and reduces work efficiency.

[0049] Therefore, to solve the above problems, in extremely cold working environments, the hydraulic oil needs to heat up rapidly after the equipment is started. This means that the heat dissipation zone 210 with the lowest heat dissipation efficiency in the heat dissipation device 200 is controlled to operate, i.e., the heat dissipation zone 210 has the fewest heat dissipation channels. In extremely hot working environments, the hydraulic oil temperature rises rapidly, requiring temperature control. Therefore, multiple heat dissipation zones 210 in the heat dissipation device 200 are controlled to participate in heat dissipation simultaneously, maximizing the heat dissipation efficiency of the heat dissipation device 200 for optimal heat dissipation matching, ensuring the hydraulic oil temperature remains within the normal operating range. See steps S70 to S90 below for details.

[0050] S70: In extremely cold working environments, the oil inlet 301 is connected to a fourth preset number of oil outlets 302 by the electronically controlled valve group module 300, so that the heat dissipation device 200 operates in the fourth heat dissipation gradient.

[0051] It should be noted that in extremely cold working environments, as the hydraulic oil temperature continues to rise, the control module 400 can further adjust a fourth preset value based on the hydraulic oil temperature detected by the temperature sensor to maintain the hydraulic oil temperature within the normal operating range. That is to say, the heat dissipation efficiency of the fourth heat dissipation gradient changes during the heating process and is a range value, not a fixed value. Similarly, the heat dissipation efficiency of the fifth heat dissipation gradient can also be a range value that changes during temperature regulation. Therefore, the control module 400 adjusts the fifth preset value to maintain the hydraulic oil temperature within the normal operating range. The heat dissipation efficiencies of the first, second, and third heat dissipation gradients also change within range values ​​during temperature regulation.

[0052] S80: In extremely hot working environments, the oil inlet 301 is connected to the fifth preset number of oil outlets 302 by the electronically controlled valve group module 300, so that the heat dissipation device 200 operates at the fifth heat dissipation gradient.

[0053] Optionally, depending on the heat dissipation requirements, the fifth preset quantity can also be that the oil inlet 301 connects to all the oil outlets 302.

[0054] S90: Under normal working conditions, perform the above step S100.

[0055] Among them, the heat dissipation efficiency of the fourth heat dissipation gradient is less than or equal to that of the first heat dissipation gradient, and the heat dissipation efficiency of the fifth heat dissipation gradient is greater than or equal to that of the third heat dissipation gradient.

[0056] Example 3 Please see Figure 1 , Figure 2 , Figure 3 and Figure 4This embodiment provides a hydraulic oil cooling system. This embodiment is an improvement upon the technology of Embodiment 1 described above. The difference between Embodiment 1 and Embodiment 1 lies in: In this embodiment, the heat dissipation device 200 includes N heat dissipation zones 210, wherein the heat dissipation efficiency of each heat dissipation zone is different, and each heat dissipation zone 210 is provided with at least one independent heat dissipation channel.

[0057] Specifically, the N heat dissipation zones 210 include a first heat dissipation zone 211, a second heat dissipation zone 212, a third heat dissipation zone 213, ..., the Nth heat dissipation zone, where N is a natural number greater than three. The number of heat dissipation channels increases or decreases from the first heat dissipation zone 211 to the Nth heat dissipation zone. Understandably, more heat dissipation channels result in better heat dissipation and higher heat dissipation efficiency. It should also be noted that the number of heat dissipation zones 210 is designed to match the tonnage and working environment of the engineering machinery; therefore, this application does not limit the specific number of heat dissipation zones 210.

[0058] In some embodiments, the number of heat dissipation channels from the first heat dissipation zone 211 to the Nth heat dissipation zone may also increase irregularly.

[0059] In other embodiments, the number of heat dissipation channels from the first heat dissipation zone 211 to the Nth heat dissipation zone may decrease irregularly.

[0060] In some other embodiments, there may be regions with the same number of heat dissipation channels from the first heat dissipation region 211 to the Nth heat dissipation region.

[0061] In this embodiment, to more clearly describe the technical solution of this application, the following examples are provided: Please see Figure 1 As shown in the figure, the heat dissipation device 200 illustrates four heat dissipation zones 210 (i.e., N=4). From right to left, the four heat dissipation zones 210 are designated as the first heat dissipation zone 211, the second heat dissipation zone 212, the third heat dissipation zone 213, and the fourth heat dissipation zone 214. The number of heat dissipation channels in the first heat dissipation zone 211 decreases progressively from the fourth heat dissipation zone 214. Specifically, the first heat dissipation zone 211 contains 8 heat dissipation channels, the second heat dissipation zone 212 contains 4 heat dissipation channels, the third heat dissipation zone 213 contains 2 heat dissipation channels, and the fourth heat dissipation zone 214 contains 1 heat dissipation channel.

[0062] It is understandable that the first, second, third, fourth, and fifth heat dissipation gradients mentioned above do not have clear boundaries. The number of heat dissipation channels involved in the operation varies depending on the gradient, with higher heat dissipation efficiency corresponding to a greater number of involved channels. Therefore, the first, second, third, fourth, and fifth heat dissipation gradients can be composed of at least one of these heat dissipation zones 210.

[0063] Correspondingly, the electronically controlled valve group module 300 includes four actuators 310, namely the first actuator A1, the second actuator A2, the third actuator A3, and the fourth actuator A4. The oil outlet 302 of the first actuator A1 is connected to the first heat dissipation area 211 through one of the second return oil branches 230. The oil outlet 302 of the second actuator A2 is connected to the second heat dissipation area 212 through one of the second return oil branches 230. The oil outlet 302 of the third actuator A3 is connected to the third heat dissipation area 213 through one of the second return oil branches 230. The oil outlet 302 of the fourth actuator A4 is connected to the fourth heat dissipation area 214 through one of the second return oil branches 230.

[0064] It should be understood that the above are merely illustrative examples and are not intended to limit the scope of protection of this application.

[0065] Furthermore, this embodiment also provides a method for cooling hydraulic oil. Based on the technical foundation of Embodiment 2 above and in conjunction with the exemplified solution of this embodiment, a detailed description is provided below: The control principle of flow rate and heat dissipation channel is as follows: The flow rate Q (which can be either the inlet or return flow rate) of the hydraulic oil in the actuator 500 is detected in real time by the flow sensor 112. Based on the ratio of the actual flow rate to the designed maximum flow rate, the signal is fed back to the control module 400, and a linear relationship is established with the heat dissipation device 200 as follows: 1) Qactual = 1 / 15Qmax, and the heat dissipation device 200 uses the fourth heat dissipation zone 214; 2) Qactual = 2 / 15Qmax, and the heat dissipation device 200 uses the third heat dissipation zone 213; 3) Q_actual = 3 / 15Q_max, heat dissipation device 200 uses the fourth heat dissipation zone 214 and the third heat dissipation zone 213; ... (see Table 1 below for specific proportions).

[0066] Table 1: Relationship between Actual Flow Rate and Radiator Application

[0067] In steps S70 and S80 above, as the hydraulic oil temperature rises and falls, the control module 400 can control the opening and closing of the first actuator A1 to the fourth actuator A4 to increase or decrease the number of heat dissipation channels through the heat dissipation device 200 to maintain the hydraulic oil temperature within the normal operating range. For example, when the hydraulic oil temperature is in the first stage (t0~t1℃), the fourth actuator A4 opens, and the fourth heat dissipation zone 214 participates in the work; when the hydraulic oil temperature is in the second stage (t1~t2℃), the actuator 310 opens in a linear relationship according to T2=kn (k is the linear relationship proportional coefficient, and n is the number of heat dissipation channels), and the related first heat dissipation zone 211, second heat dissipation zone 212, third heat dissipation zone 213 and fourth heat dissipation zone 214 work individually or in combination to achieve rapid heat dissipation matching; when the hydraulic oil temperature is in the third stage (t2~t3℃), the heat dissipation channels in the heat dissipation device 200 begin to decrease proportionally, and when the thermal equilibrium temperature is reached, the heat dissipation channels are fixed, and the heat dissipation device 200 selects one or more fixed heat dissipation zones 210 to perform heat dissipation work.

[0068] When the radiator ages or certain factors cause the hydraulic oil temperature to deviate from the control curve, a closed-loop control system is used to control the number of channels: if the temperature is too low, the number of radiator channels is automatically reduced; if the temperature is too high, the number of radiator channels is automatically increased.

[0069] Compared with existing technologies, this embodiment also has the following advantages: 1. The hydraulic oil cooling system provided in this embodiment dynamically detects the hydraulic oil temperature, thereby enabling better control of the hydraulic oil temperature; 2. In extremely cold and extremely hot working environments, the hydraulic oil temperature can be quickly controlled after startup, resulting in better hydraulic oil flow, improved work efficiency, protection of equipment operation, and extended service life. 3. An adaptive closed-loop control system is adopted, which can automatically adjust the appropriate number of heat dissipation channels even if the heat dissipation system ages.

[0070] In the description of this application, it should be understood 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between components; 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A hydraulic oil cooling system, characterized in that, include: The main oil circuit (100) connects the actuator (500) and the oil tank (600) and includes a working condition detection module (110) and a temperature detection module (120). The working condition detection module (110) is used to detect the working condition information of the actuator (500), and the temperature detection module (120) is used to detect the hydraulic oil temperature. The heat dissipation device (200) includes multiple independent heat dissipation zones (210), and the oil outlet of each heat dissipation zone (210) is connected to a first oil return branch (220), which is used to deliver hydraulic oil to the oil tank (600). The electronically controlled valve assembly module (300) includes an oil inlet (301) and multiple oil outlets (302). The oil inlet (301) is connected to the return oil line (510) of the actuator (500), and each oil outlet (302) is connected to the corresponding heat dissipation area (210) through a second return oil branch (230). and The control module (400) is configured to selectively connect the oil inlet (301) and the corresponding number of oil outlets (302) of the electronically controlled valve group module (300) according to the operating condition information and the hydraulic oil temperature; The operating condition information includes the pressure of the main oil circuit (100) and the oil flow rate of the actuator (500). The control module (400) is specifically configured as follows: Obtain the operating condition information of the actuator (500) and divide the operating condition information into low-load operating condition, normal operating condition and high-load operating condition; Under the low-load operating conditions, the oil inlet (301) is connected to the first preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) operates at the first heat dissipation gradient. Under normal operating conditions, the oil inlet (301) is connected to the second preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) operates in the second heat dissipation gradient. Under the high-load operating conditions, the oil inlet (301) is connected to the third preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) operates in the third heat dissipation gradient. The heat dissipation efficiencies of the first heat dissipation gradient, the second heat dissipation gradient, and the third heat dissipation gradient are arranged from low to high.

2. The hydraulic oil cooling system according to claim 1, characterized in that, The operating condition detection module (110) includes a pressure sensor (111) and a flow sensor (112). The pressure sensor (111) is installed in the main oil circuit (100) and is used to detect the pressure in the main oil circuit (100); The flow sensor (112) is located at the oil inlet of the actuator (500) and is used to detect the flow rate of the oil entering the actuator (500).

3. The hydraulic oil cooling system according to claim 1, characterized in that, The maximum heat dissipation efficiency of each of the heat dissipation zones (210) is different.

4. The hydraulic oil cooling system according to claim 1, characterized in that, Each of the heat dissipation zones (210) is provided with at least one independent heat dissipation channel.

5. The hydraulic oil cooling system according to claim 4, characterized in that, The number of heat dissipation channels is the same in at least two of the heat dissipation zones (210); or The number of heat dissipation channels in the plurality of heat dissipation zones (210) increases or decreases sequentially.

6. The hydraulic oil cooling system according to claim 1, characterized in that, The electronically controlled valve group module (300) includes multiple actuators (310), the number of actuators (310) corresponds to the number of heat dissipation areas (210), wherein the inlet of each actuator (310) is connected to the oil inlet (301), and the outlet of each actuator (310) is connected to the corresponding oil outlet (302).

7. A method for cooling hydraulic oil, characterized in that, The method is applied to the hydraulic oil cooling system according to any one of claims 1-6, and includes the following steps: S100: Obtain the operating condition information of the actuator (500) and divide the operating condition information into low-load operating condition, normal operating condition and high-load operating condition; S200: Under the low-load operating condition, the oil inlet (301) is connected to the first preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) operates in the first heat dissipation gradient. S300: Under the normal operating conditions, the oil inlet (301) is connected to the second preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) operates in the second heat dissipation gradient. S400: Under the high-load operating conditions, the oil inlet (301) is connected to the third preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) operates in the third heat dissipation gradient. The heat dissipation efficiencies of the first heat dissipation gradient, the second heat dissipation gradient, and the third heat dissipation gradient are arranged from low to high.

8. The hydraulic oil cooling method according to claim 7, characterized in that, Step S100 also includes: The current operating condition information of the actuator (500) is determined by the pressure and flow rate of the hydraulic oil in the main oil circuit (100).

9. The hydraulic oil cooling method according to claim 7, characterized in that, The procedure preceding step S100 also includes: S60: Obtain the current hydraulic oil temperature and classify the working environment into extremely cold working environment, normal working environment and extremely hot working environment according to the current hydraulic oil temperature. S70: In the case of the extremely cold working environment, the oil inlet (301) is connected to the fourth preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) is operating in the fourth heat dissipation gradient. S80: Under the condition of the extremely hot working environment, the oil inlet (301) is connected to the fifth preset number of oil outlets (302) by the electronically controlled valve group module (300) so that the heat dissipation device (200) operates at the fifth heat dissipation gradient; S90: Under the normal working environment, perform step S100; Wherein, the heat dissipation efficiency of the fourth heat dissipation gradient is less than or equal to the heat dissipation efficiency of the first heat dissipation gradient, and the heat dissipation efficiency of the fifth heat dissipation gradient is greater than or equal to the heat dissipation efficiency of the third heat dissipation gradient.

10. An engineering machinery, characterized in that, Includes the hydraulic oil cooling system according to any one of claims 1-6.

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