Cooling system and excavator

Abstract

The heat dissipation system comprises a main hydraulic module, a flow distribution module, a temperature detection module, a first radiator and a second radiator, the temperature detection module detects target temperature data of a first target container and a second target container and generates an oil supply flow signal and a flow distribution signal; the main hydraulic module controls the oil supply flow of main hydraulic oil according to the oil supply flow signal, and the flow distribution module adjusts the shunt volume of the first hydraulic oil and the shunt volume of the second hydraulic oil according to the flow distribution signal, so that the flow ratio of the hydraulic oil is independently adjusted for the first radiator and the second radiator. According to the heat dissipation system, the flow ratio of hydraulic oil of the first heat dissipation device and the second heat dissipation device can be independently adjusted, so that the oil supply utilization capacity of the heat dissipation system is improved, and waste of oil consumption of the heat dissipation system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of excavator heat dissipation, and particularly relates to a heat dissipation system and an excavator. Background Art

[0002] At present, the heat dissipation system of an excavator uses an oil radiator to dissipate heat from the oil in the fuel tank and a water radiator to dissipate heat from the water in the water tank.

[0003] In actual operation, the hydraulic motors of both the oil radiator and the water radiator are hydraulically supplied with oil by a fan pump. However, the rotational speeds of the hydraulic motors of the oil radiator and the water radiator can only be adjusted by the flow rate of the hydraulic oil output by the fan pump, and the proportion of the flow rate of the hydraulic oil allocated to the oil radiator and the water radiator is constant. Therefore, when one radiator needs to increase its rotational speed for enhanced heat dissipation while the other does not, only the total output flow rate of the hydraulic oil can be increased by the fan pump, thereby increasing the rotational speeds of both radiators simultaneously, resulting in waste of fuel consumption in the heat dissipation system. Therefore, how to improve the oil supply utilization ability of the excavator heat dissipation system to reduce waste of fuel consumption in the heat dissipation system has become an urgent problem to be solved. Summary of the Invention

[0004] Embodiments of the present invention disclose a heat dissipation system and an excavator, which can improve the oil supply utilization ability of the heat dissipation system to reduce waste of fuel consumption in the heat dissipation system.

[0005] To achieve the above object, in a first aspect, the present invention discloses a heat dissipation system, the system comprising:

[0006] A main hydraulic module for providing main hydraulic oil;

[0007] A flow rate distribution module, which is connected to the main hydraulic module through an oil circuit, and is used for distributing the main hydraulic oil into first hydraulic oil and second hydraulic oil;

[0008] A temperature detection module, which is electrically connected to the main hydraulic module and the flow rate distribution module respectively, and the detection ends of the temperature detection module are respectively arranged in a first target container acted upon by the heat dissipation system and a second target container acted upon by the heat dissipation system. The temperature detection module is used for detecting the target temperature data of the first target container and the second target container, and generating an oil supply flow rate signal and a flow rate distribution signal according to the target temperature data;

[0009] A first radiator, which is connected to the flow rate distribution module through an oil circuit, and is used for performing a heat dissipation operation on the first target container according to the first hydraulic oil;

[0010] A second radiator, which is connected to the flow distribution module through an oil circuit, and is used to perform a heat dissipation operation on the second target container according to the second hydraulic oil;

[0011] Wherein, the main hydraulic module is used to control the oil supply flow rate of the main hydraulic oil according to the oil supply flow rate signal, and the flow distribution module is used to adjust the split flow rate of the first hydraulic oil and the split flow rate of the second hydraulic oil according to the flow distribution signal.

[0012] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the flow distribution module includes:

[0013] A pilot hydraulic unit, which is used to provide pilot hydraulic oil;

[0014] A proportional solenoid valve, the oil inlet end of which is connected to the pilot hydraulic unit through an oil circuit, and the proportional solenoid valve is electrically connected to the temperature detection module;

[0015] A commutation unit, the pressure receiving end of which is connected to the oil outlet end of the proportional solenoid valve through an oil circuit, the oil inlet end of which is connected to the main hydraulic module through an oil circuit, the first oil outlet end of which is connected to the first radiator through an oil circuit, and the second oil outlet end of which is connected to the second radiator through an oil circuit;

[0016] Wherein, the proportional solenoid valve is used to control the hydraulic pressure of the pilot hydraulic oil on the pressure receiving end of the commutation unit according to the flow distribution signal, and the commutation unit is used to control the split flow rate of the first hydraulic oil output from the first oil outlet end of the commutation unit and the split flow rate of the second hydraulic oil output from the second oil outlet end of the commutation unit according to the hydraulic pressure of the pilot hydraulic oil.

[0017] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the commutation unit includes:

[0018] A first reversing valve, the oil inlet end of which is connected to the main hydraulic module through an oil circuit, and the pressure receiving end of which is connected to the oil outlet end of the proportional solenoid valve through an oil circuit;

[0019] A second reversing valve, the first oil inlet end and the first pressure receiving end of which are both connected to the oil outlet end of the first reversing valve through an oil circuit, the second oil inlet end and the second pressure receiving end of which are both connected to the main hydraulic module through an oil circuit, the first oil outlet end of which is connected to the first radiator through an oil circuit, and the second oil outlet end of which is connected to the second radiator through an oil circuit;

[0020] Wherein, the proportional solenoid valve is used to control the hydraulic pressure of the pilot hydraulic oil on the pressure receiving end of the first reversing valve according to the flow distribution signal, and the first reversing valve is used to control the hydraulic pressure of the main hydraulic oil on the first pressure receiving end of the second reversing valve according to the hydraulic pressure of the pilot hydraulic oil; the second reversing valve is used to control the flow rate of the first hydraulic oil output from the first oil outlet end of the second reversing valve and the flow rate of the second hydraulic oil output from the second oil outlet end of the second reversing valve according to the hydraulic pressure difference of the main hydraulic oil received by the first pressure receiving end and the second pressure receiving end.

[0021] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the target temperature data includes a first target temperature and a second target temperature, and the temperature detection module includes:

[0022] A first temperature sensor disposed in the first target container, and the first temperature sensor is used to detect the first target temperature inside the first target container;

[0023] A second temperature sensor disposed in the second target container, and the second temperature sensor is used to detect the second target temperature inside the second target container;

[0024] A controller electrically connected to the first temperature sensor, the second temperature sensor, the main hydraulic module, and the flow distribution module respectively, and the controller is used to judge the heat dissipation requirement according to the first target temperature and the second target temperature signals to obtain the oil supply flow signal and the flow distribution signal.

[0025] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the main hydraulic module includes:

[0026] An oil supply control unit electrically connected to the temperature detection module;

[0027] A target pump oil-circuit connected to the oil supply control unit and the flow distribution module respectively, and the target pump is used to provide the main hydraulic oil;

[0028] Wherein, the oil supply control unit is used to control the oil supply flow rate of the main hydraulic oil according to the oil supply flow signal.

[0029] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the oil supply control unit includes:

[0030] An electro-hydraulic proportional relief valve, which is connected to the oil circuit of the target pump and electrically connected to the temperature detection module. The electro-hydraulic proportional relief valve is used to perform the operation of adjusting the opening of its spool according to the oil supply flow signal to control the oil supply flow of the main hydraulic oil;

[0031] An oil pressure control sub-unit, which is respectively connected to the electro-hydraulic proportional relief valve and the oil circuit of the target pump. The oil pressure control sub-unit is used to perform the pressure control operation on the main hydraulic oil.

[0032] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the oil pressure control sub-unit includes:

[0033] A pressure cut-off valve, which is respectively connected to the target pump and the oil circuit of the electro-hydraulic proportional relief valve. The pressure cut-off valve is used to perform the over-pressure cut-off operation according to the hydraulic pressure of the main hydraulic oil and a preset pressure threshold;

[0034] A differential pressure valve, which is respectively connected to the pressure cut-off valve, the electro-hydraulic proportional relief valve and the oil circuit of the target pump. The differential pressure valve is used to perform the differential pressure adjustment operation according to the hydraulic pressure of the main hydraulic oil.

[0035] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the first radiator includes:

[0036] A first hydraulic motor, which is connected to the oil circuit of the flow distribution module;

[0037] A first cooling fan, which is connected to the rotating end of the first hydraulic motor; wherein, the first hydraulic motor is used to control the rotation of the first cooling fan according to the first hydraulic oil.

[0038] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the second radiator includes:

[0039] A second hydraulic motor, which is connected to the oil circuit of the flow distribution module;

[0040] A second cooling fan, which is connected to the rotating end of the second hydraulic motor; wherein, the second hydraulic motor is used to control the rotation of the second cooling fan according to the second hydraulic oil.

[0041] In a second aspect, the present invention discloses an excavator, which is characterized by including:

[0042] A first target container;

[0043] A second target container;

[0044] The heat dissipation system according to the first aspect of the present invention; wherein, the detection ends of the temperature detection module are respectively arranged in the first target container and the second target container, the first radiator is used to perform heat dissipation operation on the first target container according to the first hydraulic oil, and the second radiator is used to perform heat dissipation operation on the second target container according to the second hydraulic oil.

[0045] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0046] The heat dissipation system provided by the present invention can first detect the target temperature data of the first target container and the second target container through the temperature detection module and generate an oil supply flow signal and a flow distribution signal. The main hydraulic module controls the oil supply flow of the main hydraulic oil according to the oil supply flow signal, and the flow distribution module adjusts the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil according to the flow distribution signal, so as to separately adjust the flow ratio of the hydraulic oil for the first radiator and the second radiator, thereby improving the oil supply utilization ability of the heat dissipation system and further reducing the waste of fuel consumption of the heat dissipation system.

[0047] The excavator provided by the present invention adopts the above heat dissipation system, detects the target temperature data of the first target container and the second target container through the temperature detection module and generates an oil supply flow signal and a flow distribution signal. The main hydraulic module controls the oil supply flow of the main hydraulic oil according to the oil supply flow signal, and the flow distribution module adjusts the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil according to the flow distribution signal, so as to separately adjust the flow ratio of the hydraulic oil for the first radiator and the second radiator, thereby improving the oil supply utilization ability of the excavator heat dissipation system and further reducing the waste of fuel consumption of the heat dissipation system. Description of the Drawings

[0048] Figure 1 It is a schematic structural diagram of the first embodiment of the heat dissipation system in the present invention;

[0049] Figure 2 It is a schematic structural diagram of the second embodiment of the heat dissipation system in the present invention;

[0050] Figure 3 It is a schematic structural diagram of the third embodiment of the heat dissipation system in the present invention.

[0051] Among them, the meanings of the reference numerals are as follows:

[0052] Main hydraulic module 100, target pump 110, oil supply control unit 120, electro-hydraulic proportional relief valve 121, oil pressure control sub-unit 122, pressure cut-off valve 1221, differential pressure valve 1222, flow distribution module 200, proportional solenoid valve 210, reversing unit 220, first reversing valve 221, second reversing valve 222, pilot hydraulic unit 230, temperature detection module 300, first radiator 400, second radiator 500. Detailed implementation mode

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] In the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0055] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0056] In addition, the terms "installed", "set", "provided with", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "plurality" is two or more.

[0058] The technical solution of the present invention will be further described below in conjunction with embodiments and the accompanying drawings.

[0059] At present, the heat dissipation system of an excavator uses an oil radiator to dissipate heat from the oil in the fuel tank and a water radiator to dissipate heat from the water in the water tank.

[0060] In actual operation, the hydraulic motors of both the oil radiator and the water radiator are hydraulically supplied with oil by a fan pump. However, the rotational speeds of the hydraulic motors of the oil radiator and the water radiator can only be adjusted by the flow rate of the hydraulic oil output by the fan pump, and the proportion of the flow rate of the hydraulic oil allocated to the oil radiator and the water radiator is constant. Therefore, when one radiator needs to increase its rotational speed to enhance heat dissipation while the other does not, only the total output flow rate of the hydraulic oil can be increased by the fan pump, thereby increasing the rotational speeds of both radiators simultaneously, resulting in a waste of fuel consumption in the heat dissipation system. Therefore, how to improve the oil supply utilization ability of the excavator heat dissipation system to reduce the waste of fuel consumption in the heat dissipation system has become an urgent problem to be solved.

[0061] In response to this, the embodiments of the present invention disclose a heat dissipation system and an excavator, which can improve the oil supply utilization ability of the heat dissipation system to reduce the waste of fuel consumption in the heat dissipation system.

[0062] As Figure 1 shown, the present invention discloses a heat dissipation system, which includes: a main hydraulic module 100, a flow distribution module 200, a temperature detection module 300, a first radiator 400, and a second radiator 500. The main hydraulic module 100 is used to provide main hydraulic oil; the flow distribution module 200 is connected to the main hydraulic module 100 by an oil circuit, and the flow distribution module 200 is used to distribute the main hydraulic oil into a first hydraulic oil and a second hydraulic oil; the temperature detection module 300 is electrically connected to the main hydraulic module 100 and the flow distribution module 200 respectively, and the detection ends of the temperature detection module 300 are respectively arranged in a first target container affected by the heat dissipation system and a second target container affected by the heat dissipation system. The temperature detection module 300 is used to detect the target temperature data of the first target container and the second target container, and generate an oil supply flow signal and a flow distribution signal according to the target temperature data; the first radiator 400 is connected to the flow distribution module 200 by an oil circuit, and the first radiator 400 is used to perform a heat dissipation operation on the first target container according to the first hydraulic oil; the second radiator 500 is connected to the flow distribution module 200 by an oil circuit, and the second radiator 500 is used to perform a heat dissipation operation on the second target container according to the second hydraulic oil; the main hydraulic module 100 is used to control the oil supply flow rate of the main hydraulic oil according to the oil supply flow signal, and the flow distribution module 200 is used to adjust the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil according to the flow distribution signal.

[0063] In this embodiment, both the first target container and the second target container are containers for storing corresponding liquids in working instruments such as excavators. For example, the first target container can be selected as a fuel tank, and fuel is stored in the first target container correspondingly. The second target container can be selected as a water tank, and cooling water is stored in the second target container correspondingly. In the following embodiments, the first target container is taken as a fuel tank and the second target container is taken as a water tank for illustration. It can be understood that the first target container and the second target container can be replaced with other types of containers according to actual needs.

[0064] The detection ends of the temperature detection module 300 are respectively arranged in the first target container and the second target container. By respectively detecting the target temperature data inside the first target container and the second target container, the oil temperature of the fuel in the first target container and the water temperature of the cooling water in the second target container can be obtained. After the temperature detection module 300 obtains the target temperature data, it calculates the total oil supply flow required by the first radiator 400 and the second radiator 500 based on the target temperature data, thereby generating an oil supply flow signal containing the total oil supply flow data, and calculates the split flow required by each of the first radiator 400 and the second radiator 500, thereby generating a flow distribution signal containing the split flow data required by each of the two radiators.

[0065] The flow distribution module 200 is respectively connected to the main hydraulic module 100, the first radiator 400, and the second radiator 500 through oil circuits. Among them, the flow distribution module 200 can distribute the main hydraulic oil provided by the main hydraulic module 100 into the first hydraulic oil and the second hydraulic oil, output the first hydraulic oil to the first radiator 400, and output the second hydraulic oil to the second radiator 500. After receiving the first hydraulic oil, the first radiator 400 starts to perform the heat dissipation operation on the first target container. After receiving the second hydraulic oil, the second radiator 500 starts to perform the heat dissipation operation on the second target container.

[0066] The main hydraulic module 100 and the flow distribution module 200 are both electrically connected to the temperature detection module 300. The main hydraulic module 100 receives the oil supply flow signal output by the temperature detection module 300 and adjusts the oil supply flow of the main hydraulic oil provided according to this oil supply flow signal. The flow distribution module 200 receives the flow distribution signal output by the temperature detection module 300 and adjusts the split flow of the first hydraulic oil and the split flow of the second hydraulic oil according to this flow distribution signal. It can be understood that the heat dissipation effects of the first radiator 400 and the second radiator 500 are positively correlated with the hydraulic oil flow received by each of them, that is, the more the hydraulic oil flow received by any radiator, the higher the working power of the radiator to perform heat dissipation operation, and the better the heat dissipation effect achieved. Therefore, the flow distribution module 200 separately controls the heat dissipation effects of the first radiator 400 and the second radiator 500 by adjusting the split flow of the first hydraulic oil and the split flow of the second hydraulic oil respectively.

[0067] It can be seen that the heat dissipation system of the present invention can first detect the target temperature data of the first target container and the second target container through the temperature detection module 300 and generate an oil supply flow signal and a flow distribution signal. The main hydraulic module 100 controls the oil supply flow of the main hydraulic oil according to the oil supply flow signal, and the flow distribution module 200 adjusts the split flow of the first hydraulic oil and the split flow of the second hydraulic oil according to the flow distribution signal, thereby separately adjusting the flow ratio of the hydraulic oil for the first radiator 400 and the second radiator 500, improving the oil supply utilization ability of the heat dissipation system, and further reducing the waste of oil consumption of the heat dissipation system.

[0068] As Figure 2 shown, in an optional embodiment, the flow distribution module 200 includes a pilot hydraulic unit 230, a proportional solenoid valve 210, and a commutation unit 220. The pilot hydraulic unit 230 is used to provide pilot hydraulic oil; the oil inlet end of the proportional solenoid valve 210 is connected to the oil circuit of the pilot hydraulic unit 230, and the proportional solenoid valve 210 is electrically connected to the temperature detection module 300; the pressure receiving end of the commutation unit 220 is connected to the oil outlet end of the proportional solenoid valve 210 in an oil circuit, the oil inlet end of the commutation unit 220 is connected to the main hydraulic module 100 in an oil circuit, the first oil outlet end of the commutation unit 220 is connected to the first radiator 400 in an oil circuit, and the second oil outlet end of the commutation unit 220 is connected to the second radiator 500 in an oil circuit; the proportional solenoid valve 210 is used to control the hydraulic pressure of the pilot hydraulic oil on the pressure receiving end of the commutation unit 220 according to the flow distribution signal, and the commutation unit 220 is used to control the split flow of the first hydraulic oil output from the first oil outlet end of the commutation unit 220 and the split flow of the second hydraulic oil output from the second oil outlet end of the commutation unit 220 according to the hydraulic pressure of the pilot hydraulic oil.

[0069] In this alternative embodiment, the proportional solenoid valve 210 is respectively connected to the pressure receiving ends of the pilot hydraulic unit 230 and the commutation unit 220 through oil circuits. The pilot hydraulic unit 230 can deliver the provided pilot hydraulic oil to the oil inlet end of the proportional solenoid valve 210. The proportional solenoid valve 210 is electrically connected to the temperature detection module 300. After receiving the flow distribution signal output by the temperature detection module 300, the proportional solenoid valve 210 controls the opening degree of its own valve core according to this flow distribution signal, so as to control the magnitude of the hydraulic pressure of the pilot hydraulic oil output by the proportional solenoid valve 210.

[0070] The main hydraulic module 100 is connected to the oil inlet end of the commutation unit 220 through an oil circuit. The first radiator 400 is connected to the first oil outlet end of the commutation unit 220 through an oil circuit. The second radiator 500 is connected to the second oil outlet end of the commutation unit 220 through an oil circuit. The commutation unit 220 can split the main hydraulic oil input at the oil inlet end into the first hydraulic oil and the second hydraulic oil, and output the first hydraulic oil through the first oil outlet end of the commutation unit 220, and output the second hydraulic oil through the second oil outlet end of the commutation unit 220.

[0071] When the pressure receiving end of the commutation unit 220 receives the action of the hydraulic pressure of the pilot hydraulic oil, through the pushing of the different hydraulic pressures on the pressure receiving end of the commutation unit 220, the oil discharge amount between the first oil outlet end and the second oil outlet end of the commutation unit 220 can be controlled, so as to control the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil output.

[0072] It can be seen that this alternative embodiment can also adjust the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil output by the commutation unit 220 through the proportional solenoid valve 210 according to the flow distribution signal, thereby improving the operating performance of the heat dissipation system in adjusting the flow rate ratio.

[0073] Such as Figure 3As shown, in an alternative embodiment, the commutation unit 220 includes: a first commutation valve 221 and a second commutation valve 222. The oil inlet end of the first commutation valve 221 is connected to the oil circuit of the main hydraulic module 100, and the pressure receiving end of the first commutation valve 221 is connected to the oil outlet end of the proportional solenoid valve 210; the first oil inlet end and the first pressure receiving end of the second commutation valve 222 are both connected to the oil outlet end of the first commutation valve 221, the second oil inlet end and the second pressure receiving end of the second commutation valve 222 are both connected to the oil circuit of the main hydraulic module 100, the first oil outlet end of the second commutation valve 222 is connected to the oil circuit of the first radiator 400, and the second oil outlet end of the second commutation valve 222 is connected to the oil circuit of the second radiator 500; the proportional solenoid valve 210 is used to control the hydraulic pressure of the pilot hydraulic oil on the pressure receiving end of the first commutation valve 221 according to the flow distribution signal, and the first commutation valve 221 is used to control the hydraulic pressure of the main hydraulic oil on the first pressure receiving end of the second commutation valve 222 according to the hydraulic pressure of the pilot hydraulic oil; the second commutation valve 222 is used to control the flow rate of the first hydraulic oil output from the first oil outlet end of the second commutation valve 222 and the flow rate of the second hydraulic oil output from the second oil outlet end of the second commutation valve 222 according to the hydraulic pressure difference of the main hydraulic oil received by the first pressure receiving end and the second pressure receiving end.

[0074] In this alternative embodiment, the main hydraulic module 100 is connected to the oil inlet end of the first commutation valve 221, the oil outlet end of the first commutation valve 221 is respectively connected to the first pressure receiving end and the first oil inlet end of the second commutation valve 222, and the pressure receiving end of the first commutation valve 221 is connected to the oil outlet end of the proportional solenoid valve 210. When the pressure receiving end of the first commutation valve 221 receives the action of the hydraulic pressure of the pilot hydraulic oil, the opening degree of the valve core of the first commutation valve 221 changes. At this time, under the control of the proportional solenoid valve 210 of the hydraulic pressure magnitude of the pilot hydraulic oil, by the push of different hydraulic pressures on the pressure receiving end of the first commutation valve 221, the opening degree of the valve core of the first commutation valve 221 can be controlled, and further the hydraulic pressure action of the main hydraulic oil passing through the first commutation valve 221 on the first pressure receiving end of the second commutation valve 222 can be controlled.

[0075] The main hydraulic module 100 is also respectively connected to the second oil inlet end and the second pressure receiving end of the second commutation valve 222. Due to the control of the hydraulic pressure of the main hydraulic oil output from its oil outlet end by the first commutation valve 221, the hydraulic pressure received by the first pressure receiving end of the second commutation valve 222 can be indirectly adjusted by the proportional solenoid valve 210. At the same time, due to the stability of the hydraulic pressure of the main hydraulic oil provided by the main hydraulic module 100, the hydraulic pressure received by the second pressure receiving end of the second commutation valve 222 also remains stable.

[0076] The channel between the first oil inlet end and the first oil outlet end of the second reversing valve 222 is the first oil circuit channel, and the channel between the second oil inlet end and the second oil outlet end of the second reversing valve 222 is the second oil circuit channel. When the proportional solenoid valve 210 receives the flow distribution signal, the hydraulic pressure received by the first pressure receiving end of the second reversing valve 222 changes. At this time, there is a hydraulic pressure difference between the first pressure receiving end and the second pressure receiving end of the second reversing valve 222, thereby adjusting the spool opening area of the second reversing valve 222, that is, adjusting the opening areas of the first oil circuit channel and the second oil circuit channel, so as to realize the adjustment of the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil.

[0077] It can be seen that this alternative embodiment can also adjust the flow rates of the first hydraulic oil and the second hydraulic oil of the reversing unit 220 through the first reversing valve 221 and the second reversing valve 222, thereby improving the operating performance of the heat dissipation system in adjusting the flow rate ratio.

[0078] In an alternative embodiment, the target temperature data includes a first target temperature and a second target temperature, and the temperature detection module 300 includes: a first temperature sensor, a second temperature sensor, and a controller. The first temperature sensor is disposed in the first target container, and the first temperature sensor is used to detect the first target temperature inside the first target container; the second temperature sensor is disposed in the second target container, and the second temperature sensor is used to detect the second target temperature inside the second target container; the controller is electrically connected to the first temperature sensor, the second temperature sensor, the main hydraulic module 100, and the flow distribution module 200 respectively, and the controller is used to judge the heat dissipation requirement according to the first target temperature and the second target temperature signals to obtain the oil supply flow signal and the flow distribution signal.

[0079] In this alternative embodiment, the first temperature sensor is disposed inside the first target container to detect the first target temperature inside the first target container, that is, to detect the oil temperature of the fuel. The second temperature sensor is disposed inside the second target container to detect the second target temperature inside the second target container, that is, to detect the water temperature of the cooling water.

[0080] The first temperature sensor, the second temperature sensor, the proportional solenoid valve 210, and the main hydraulic module 100 are all electrically connected to the controller. After receiving the first target temperature and the second target temperature, the controller calculates the flow rate of the first hydraulic oil required by the first radiator 400 according to the first target temperature, calculates the flow rate of the second hydraulic oil required by the second radiator 500 according to the second target temperature, and calculates the total supply flow rate of the main hydraulic oil that the main hydraulic module 100 needs to provide based on the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil. A flow rate distribution signal is generated based on the obtained flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil, and a supply flow rate signal is generated based on the obtained total supply flow rate of the main hydraulic oil, so that the total supply flow rate of the main hydraulic oil provided by the main hydraulic module 100 can be correspondingly adjusted through the supply flow rate signal, and the flow rate of the first hydraulic oil and the flow rate of the second hydraulic oil output by the second reversing valve 222 can be correspondingly adjusted through the flow rate distribution signal.

[0081] It can be seen that in this alternative embodiment, the controller can also calculate the flow rate of the first hydraulic oil, the flow rate of the second hydraulic oil, and the total supply flow rate of the main hydraulic oil required according to the first target temperature detected by the first temperature sensor and the second target temperature detected by the second temperature sensor, and generate a supply flow rate signal and a flow rate distribution signal based on this to control the supply flow rate of the main hydraulic oil, the flow rate of the first hydraulic oil, and the flow rate of the second hydraulic oil, thereby improving the adjustment accuracy of the supply flow rate of the main hydraulic oil and the flow rates of the first hydraulic oil and the second hydraulic oil.

[0082] As Figure 3 shown, in an alternative embodiment, the main hydraulic module 100 includes: a supply oil control unit 120 and a target pump 110. The supply oil control unit 120 is electrically connected to the temperature detection module 300; the target pump 110 is respectively connected to the supply oil control unit 120 and the flow rate distribution module 200 through oil circuits, and the target pump 110 is used to provide the main hydraulic oil; the supply oil control unit 120 is used to control the supply flow rate of the main hydraulic oil according to the supply flow rate signal.

[0083] In this alternative embodiment, the target pump 110 is respectively connected to the supply oil control unit 120, the first reversing valve 221, and the second reversing valve 222 through oil circuits, and the target pump 110 can supply the main hydraulic oil to the oil inlet end of the first reversing valve 221, the second oil inlet end of the second reversing valve 222, and the second pressure receiving end. The controller in the temperature detection module 300 is electrically connected to the supply oil control unit 120. After receiving the supply flow rate signal sent by the controller, the supply oil control unit 120 adjusts the supply flow rate of the main hydraulic oil output by the target pump 110 according to the supply flow rate signal.

[0084] It can be seen that this alternative embodiment can also adjust the oil supply flow rate of the main hydraulic oil output by the target pump 110 through the oil supply control unit 120, thereby improving the operating performance of the heat dissipation system in adjusting the oil supply flow rate.

[0085] As Figure 3 shown, in an alternative embodiment, the oil supply control unit 120 includes: an electro-hydraulic proportional relief valve 121 and an oil pressure control sub-unit 122. The electro-hydraulic proportional relief valve 121 is connected to the target pump 110 through an oil circuit, and the electro-hydraulic proportional relief valve 121 is electrically connected to the temperature detection module 300. The electro-hydraulic proportional relief valve 121 is used to perform the operation of adjusting the opening degree of its spool according to the oil supply flow rate signal to control the oil supply flow rate of the main hydraulic oil; the oil pressure control sub-unit 122 is respectively connected to the electro-hydraulic proportional relief valve 121 and the target pump 110 through an oil circuit, and the oil pressure control sub-unit 122 is used to perform the operation of controlling the oil pressure of the main hydraulic oil.

[0086] In this alternative embodiment, the electro-hydraulic proportional relief valve 121 is respectively connected to the target pump 110 and the oil pressure control sub-unit 122 through an oil circuit, and the electro-hydraulic proportional relief valve 121 is also electrically connected to the controller. After receiving the oil supply flow rate signal sent by the controller, the electro-hydraulic proportional relief valve 121 adjusts the opening and closing degree of its own spool according to the oil supply flow rate signal, so as to adjust the flow rate of the hydraulic oil in the oil circuit connected to the target pump 110, that is, to realize the adjustment of the oil supply flow rate of the main hydraulic oil.

[0087] The oil pressure control sub-unit 122 is respectively connected to the electro-hydraulic proportional relief valve 121 and the target pump 110 through an oil circuit. The oil pressure control sub-unit 122 can perform self-feedback adjustment on the oil pressure of the main hydraulic oil based on the change of the oil pressure of the main hydraulic oil, so as to keep the oil pressure of the main hydraulic oil stable.

[0088] It can be seen that this alternative embodiment can also adjust the oil supply flow rate of the main hydraulic oil output by the target pump 110 through the electro-hydraulic proportional relief valve 121, thereby further improving the operating performance of the heat dissipation system in adjusting the oil supply flow rate. At the same time, it can also adjust the oil pressure of the main hydraulic oil through the oil pressure control sub-unit 122, so as to keep the oil pressure of the main hydraulic oil stable.

[0089] As Figure 3 shown, in an alternative embodiment, the oil pressure control sub-unit 122 includes: a pressure cut-off valve 1221 and a differential pressure valve 1222. The pressure cut-off valve 1221 is respectively connected to the target pump 110 and the electro-hydraulic proportional relief valve 121 through an oil circuit, and the pressure cut-off valve 1221 is used to perform overpressure cut-off operation according to the oil pressure of the main hydraulic oil and a preset pressure threshold; the differential pressure valve 1222 is respectively connected to the pressure cut-off valve 1221, the electro-hydraulic proportional relief valve 121 and the target pump 110 through an oil circuit, and the differential pressure valve 1222 is used to perform differential pressure adjustment operation according to the oil pressure of the main hydraulic oil.

[0090] In this alternative embodiment, the pressure receiving end of the pressure cut-off valve 1221 is oil-way connected to the oil-way node of the electro-hydraulic proportional relief valve 121 and the target pump 110. The pressure cut-off valve 1221 receives the hydraulic pressure of the main hydraulic oil through its pressure receiving end. When the hydraulic pressure of the main hydraulic oil exceeds the pressure threshold that the pressure cut-off valve 1221 can bear itself, the pressure cut-off valve 1221 shuts off the oil-way to avoid overpressure faults in the oil-way pipeline. The pressure receiving end of the differential pressure valve 1222 is oil-way connected to the electro-hydraulic proportional relief valve 121. The differential pressure valve 1222 receives the hydraulic pressure of the main hydraulic oil through its pressure receiving end and self-feedback adjusts the hydraulic pressure difference of the main hydraulic oil based on the change of the hydraulic pressure of the main hydraulic oil, so as to keep the hydraulic pressure of the main hydraulic oil stable.

[0091] It can be seen that this alternative embodiment can also shut off the oil-way through the pressure cut-off valve 1221 when overpressure occurs to avoid overpressure faults in the oil-way pipeline, and can also adjust the hydraulic pressure difference of the main hydraulic oil through the differential pressure valve 1222, so as to keep the hydraulic pressure of the main hydraulic oil stable.

[0092] In an alternative embodiment, the first radiator 400 includes: a first hydraulic motor and a first cooling fan. The first hydraulic motor is oil-way connected to the flow distribution module 200; the first cooling fan is connected to the rotating end of the first hydraulic motor; wherein, the first hydraulic motor is used to control the first cooling fan to rotate according to the first hydraulic oil.

[0093] In this alternative embodiment, the first hydraulic motor is oil-way connected to the first oil outlet end of the second reversing valve 222. The rotating end of the first hydraulic motor is connected to the first cooling fan, and the first cooling fan is correspondingly arranged with the first target container. The first hydraulic motor controls the first cooling fan to rotate according to the received first hydraulic oil, so as to perform air-cooling on the first target container. At the same time, the more the split flow of the first hydraulic oil, the faster the rotation speed of the first cooling fan, and the stronger the cooling effect on the first target container.

[0094] It can be seen that this alternative embodiment can also control the first cooling fan to rotate by the first hydraulic motor according to the received first hydraulic oil, so as to perform air-cooling on the first target container, thereby improving the cooling effect on the first target container. At the same time, it can also adjust the split flow of the first hydraulic oil by controlling the proportional solenoid valve 210 through the temperature detection module 300, so as to adjust the cooling effect of the first cooling fan on the first target container, thereby improving the operating performance of the cooling control of the first target container.

[0095] In an alternative embodiment, the second radiator 500 includes: a second hydraulic motor and a second cooling fan. The second hydraulic motor is connected to the flow distribution module 200 through an oil circuit; the second cooling fan is connected to the rotating end of the second hydraulic motor; wherein, the second hydraulic motor is used to control the rotation of the second cooling fan according to the second hydraulic oil.

[0096] In this alternative embodiment, the second hydraulic motor is connected to the second oil outlet end of the second reversing valve 222 through an oil circuit, the rotating end of the second hydraulic motor is connected to the second cooling fan, and the second cooling fan is correspondingly arranged with the second target container. The second hydraulic motor controls the rotation of the second cooling fan according to the received second hydraulic oil, so as to perform air cooling on the second target container. At the same time, the more the split flow of the second hydraulic oil, the faster the rotation speed of the second cooling fan, and the stronger the heat dissipation effect on the second target container.

[0097] It can be seen that this alternative embodiment can also control the rotation of the second cooling fan by the second hydraulic motor according to the received second hydraulic oil, so as to perform air cooling on the second target container, thereby improving the heat dissipation effect on the second target container. At the same time, it can also control the proportional solenoid valve 210 through the temperature detection module 300 to adjust the split flow of the second hydraulic oil, so as to adjust the heat dissipation effect of the second cooling fan on the second target container, thereby improving the operating performance of the heat dissipation control of the second target container.

[0098] The present invention also discloses an excavator, which includes a first target container, a second target container, and the heat dissipation system described in the above embodiments of the present invention. The detection ends of the temperature detection module 300 are respectively arranged in the first target container and the second target container. The first radiator 400 is used to perform heat dissipation operation on the first target container according to the first hydraulic oil, and the second radiator 500 is used to perform heat dissipation operation on the second target container according to the second hydraulic oil.

[0099] It can be seen that in this embodiment, the excavator adopts the above heat dissipation system, which can detect the target temperature data of the first target container and the second target container through the temperature detection module 300 and generate an oil supply flow signal and a flow distribution signal. The main hydraulic module 100 controls the oil supply flow of the main hydraulic oil according to the oil supply flow signal, and the flow distribution module 200 adjusts the split flow of the first hydraulic oil and the split flow of the second hydraulic oil according to the flow distribution signal, so as to separately adjust the flow ratio of the hydraulic oil for the first radiator 400 and the second radiator 500, thereby improving the oil supply utilization ability of the excavator heat dissipation system, and further reducing the waste of fuel consumption of the heat dissipation system.

[0100] The technical means disclosed by the solution of the present invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A heat dissipation system, characterized in that: The system comprises: A main hydraulic module, the main hydraulic module is used to provide main hydraulic oil; A flow distribution module, the flow distribution module is connected to the oil circuit of the main hydraulic module, and the flow distribution module is used to distribute the main hydraulic oil into a first hydraulic oil and a second hydraulic oil; a temperature detection module, the temperature detection module being electrically connected to the main hydraulic module and the flow distribution module respectively, the detection ends of the temperature detection module being respectively arranged in the first target container acted upon by the heat dissipation system and the second target container acted upon by the heat dissipation system, the temperature detection module being used to detect target temperature data of the first target container and the second target container, and generating an oil supply flow signal and a flow distribution signal according to the target temperature data; a first radiator, the first radiator being connected to the oil circuit of the flow distribution module, and the first radiator being used to perform a heat dissipation operation on the first target container according to the first hydraulic oil; a second radiator, the second radiator being connected to the oil circuit of the flow distribution module, and the second radiator being used to perform a heat dissipation operation on the second target container according to the second hydraulic oil; The main hydraulic module is used to control the oil supply flow of the main hydraulic oil according to the oil supply flow signal, and the flow distribution module is used to adjust the split flow of the first hydraulic oil and the split flow of the second hydraulic oil according to the flow distribution signal.

2. The heat dissipation system according to claim 1, characterized in that: The flow distribution module comprises: A pilot hydraulic unit, wherein the pilot hydraulic unit is used to provide pilot hydraulic oil; A proportional solenoid valve, wherein the oil inlet end of the proportional solenoid valve is connected to the oil circuit of the pilot hydraulic unit, and the proportional solenoid valve is electrically connected to the temperature detection module; A reversing unit, wherein the pressure receiving end of the reversing unit is connected to the oil outlet end oil circuit of the proportional solenoid valve, the oil inlet end of the reversing unit is connected to the oil circuit of the main hydraulic module, the first oil outlet end of the reversing unit is connected to the first radiator oil circuit, and the second oil outlet end of the reversing unit is connected to the second radiator oil circuit; Among them, the proportional solenoid valve is used to control the hydraulic pressure of the pilot hydraulic oil on the pressure receiving end of the reversing unit according to the flow distribution signal, and the reversing unit is used to control the diversion flow of the first hydraulic oil output from the first oil outlet end of the reversing unit and the diversion flow of the second hydraulic oil output from the second oil outlet end of the reversing unit according to the hydraulic pressure of the pilot hydraulic oil.

3. The heat dissipation system according to claim 2, characterized in that: The switching unit comprises: A first reversing valve, wherein an oil inlet end of the first reversing valve is connected to an oil circuit of the main hydraulic module, and a pressure receiving end of the first reversing valve is connected to an oil outlet end of the proportional solenoid valve; a second reversing valve, wherein a first oil inlet end of the second reversing valve and a first pressure receiving end of the second reversing valve are both connected to an oil circuit of an oil outlet end of the first reversing valve, a second oil inlet end of the second reversing valve and a second pressure receiving end of the second reversing valve are both connected to an oil circuit of the main hydraulic module, a first oil outlet end of the second reversing valve is connected to an oil circuit of the first radiator, and a second oil outlet end of the second reversing valve is connected to an oil circuit of the second radiator; Among them, the proportional solenoid valve is used to control the hydraulic pressure of the pilot hydraulic oil on the pressure receiving end of the first reversing valve according to the flow distribution signal, and the first reversing valve is used to control the hydraulic pressure of the main hydraulic oil on the first pressure receiving end of the second reversing valve according to the hydraulic pressure of the pilot hydraulic oil; the second reversing valve is used to control the diversion flow of the first hydraulic oil output from the first oil outlet end of the second reversing valve and the diversion flow of the second hydraulic oil output from the second oil outlet end of the second reversing valve according to the hydraulic pressure difference of the main hydraulic oil exerted on the first pressure receiving end and the second pressure receiving end.

4. The heat dissipation system according to claim 1, characterized in that: The target temperature data includes a first target temperature and a second target temperature, and the temperature detection module includes: a first temperature sensor, the first temperature sensor being disposed in the first target container, and the first temperature sensor being used to detect a first target temperature inside the first target container; a second temperature sensor, the second temperature sensor being disposed in the second target container, and the second temperature sensor being used to detect a second target temperature inside the second target container; A controller, wherein the controller is electrically connected to the first temperature sensor, the second temperature sensor, the main hydraulic module and the flow distribution module respectively, and the controller is used to determine the heat dissipation demand according to the first target temperature and the second target temperature signals to obtain the oil supply flow signal and the flow distribution signal.

5. The heat dissipation system according to claim 1, characterized in that: The main hydraulic module comprises: An oil supply control unit, the oil supply control unit is electrically connected to the temperature detection module; A target pump, the target pump is connected to the oil supply control unit and the flow distribution module oil circuit respectively, and the target pump is used to provide the main hydraulic oil; Wherein, the oil supply control unit is used to control the oil supply flow rate of the main hydraulic oil according to the oil supply flow rate signal.

6. The heat dissipation system according to claim 5, characterized in that: The fuel supply control unit comprises: an electric proportional relief valve, the electric proportional relief valve being connected to the target pump oil circuit, the electric proportional relief valve being electrically connected to the temperature detection module, and the electric proportional relief valve being used to perform a valve core opening adjustment operation according to the oil supply flow signal to control the oil supply flow of the main hydraulic oil; An oil pressure control subunit, wherein the oil pressure control subunit is respectively connected to the electric proportional relief valve and the target pump oil circuit, and the oil pressure control subunit is used to perform a pressure control operation on the main hydraulic oil.

7. The heat dissipation system according to claim 6, characterized in that: The oil pressure control subunit comprises: a pressure cut-off valve, the pressure cut-off valve being connected to the target pump and the electric proportional relief valve oil circuit respectively, the pressure cut-off valve being used to perform an overpressure cut-off operation according to the hydraulic pressure of the main hydraulic oil and a preset pressure threshold; A pressure differential valve is connected to the pressure cut-off valve, the electric proportional relief valve and the target pump oil circuit respectively, and the pressure differential valve is used to perform a pressure differential adjustment operation according to the hydraulic pressure of the main hydraulic oil.

8. The heat dissipation system according to any one of claims 1 to 7, characterized in that: The first heat sink comprises: A first hydraulic motor, wherein the first hydraulic motor is connected to an oil circuit of the flow distribution module; A first cooling fan is connected to a rotating end of the first hydraulic motor; wherein the first hydraulic motor is used for controlling the first cooling fan to rotate according to the first hydraulic oil.

9. The heat dissipation system according to any one of claims 1 to 7, characterized in that: The second radiator comprises: a second hydraulic motor, the second hydraulic motor being connected to an oil circuit of the flow distribution module; A second cooling fan, wherein the second cooling fan is connected to the rotating end of the second hydraulic motor; wherein the second hydraulic motor is used for controlling the second cooling fan to rotate according to the second hydraulic oil.

10. An excavator, characterized in that: The excavator comprises: a first target container; a second target container; The heat dissipation system according to any one of claims 1 to 9; wherein the detection ends of the temperature detection module are respectively arranged in the first target container and the second target container, the first radiator is used to perform a heat dissipation operation on the first target container according to the first hydraulic oil, and the second radiator is used to perform a heat dissipation operation on the second target container according to the second hydraulic oil.

Images