Heating control method, processor and engineering machinery for hydraulic system

Abstract

The embodiment of the present application provides a heating control method, processor, engineering machinery and machine-readable storage medium for a hydraulic system. The hydraulic system includes a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve. The hydraulic actuator is connected to the hydraulic pump through the main control valve, and the relief valve is connected to the hydraulic pump through the proportional valve. The heating control method includes: obtaining the maximum output flow of the hydraulic pump; determining the driving flow required by the hydraulic actuator according to the opening of the main control valve; determining whether the maximum output flow is greater than the driving flow; when it is determined that the maximum output flow is greater than the driving flow, opening the proportional valve to overflow the relief valve to heat the hydraulic oil.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a heating control method for a hydraulic system, a processor, an engineering machinery, and a machine-readable storage medium. Background Art

[0002] Hydraulic oil is a hydraulic medium widely used in hydraulic systems of construction machinery. It plays the role of energy transmission, anti-wear, system lubrication, corrosion prevention, rust prevention, cooling, etc. When the hydraulic system is working, if the ambient temperature is low, the hydraulic oil temperature is also low, resulting in thicker hydraulic oil and greater damping, which reduces the working performance of the hydraulic system and affects the construction efficiency of construction machinery.

[0003] In the prior art, there are two main ways to heat the hydraulic oil. One is to use an independent heat source for external heating, and the other is to add an overflow valve oil circuit. When the hydraulic oil needs to be heated, the hydraulic system is switched to connect to the overflow valve oil circuit for overflow heating. However, the former method requires the installation of a standing, independent heat exchange system to provide external heat energy to the heated object. The system is complex and the cost is high. The latter method cannot perform overflow heating and driving operations at the same time. During overflow heating, the hydraulic system cannot be used to drive the actuator to move, resulting in a long waiting time for the operation. During driving operations, the hydraulic system cannot be used for overflow heating, resulting in slow heating of the hydraulic oil. Summary of the invention

[0004] In order to at least partially solve the above-mentioned problems existing in the prior art, an object of the embodiments of the present application is to provide a heating control method, a processor, a construction machine and a machine-readable storage medium for a hydraulic system.

[0005] In order to achieve the above-mentioned object, the first aspect of the present application provides a heating control method for a hydraulic system, wherein the hydraulic system includes a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve, wherein the hydraulic actuator is connected to the hydraulic pump through the main control valve, and the relief valve is connected to the hydraulic pump through the proportional valve, and the heating control method includes:

[0006] Get the maximum output flow of the hydraulic pump;

[0007] Determine the driving flow required by the hydraulic actuator according to the opening of the main control valve;

[0008] Determine whether the maximum output flow is greater than the driving flow;

[0009] When it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the relief valve to overflow, so as to heat the hydraulic oil.

[0010] In the embodiment of the present application, the hydraulic system further includes an operating element, which is connected to the main control valve and is used to adjust the opening of the main control valve;

[0011] Determine the driving flow required by the hydraulic actuator according to the opening of the main control valve, including:

[0012] Determine the opening of the main control valve according to the operating conditions of the operating element;

[0013] The driving flow required by the hydraulic actuator is determined according to the opening of the main control valve.

[0014] In the embodiment of the present application, when it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil, including:

[0015] When it is determined that the maximum output flow is greater than the driving flow, the hydraulic oil temperature at the oil inlet of the hydraulic pump is obtained;

[0016] determining whether the hydraulic oil temperature is lower than a first preset temperature;

[0017] When it is determined that the temperature of the hydraulic oil is lower than the first preset temperature, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil.

[0018] In the embodiment of the present application, when it is determined that the temperature of the hydraulic oil is lower than the first temperature threshold, after the proportional valve is opened to allow the overflow valve to overflow so as to heat the hydraulic oil, the heating control method further includes:

[0019] Determining whether the hydraulic oil temperature is higher than a second preset temperature, wherein the second preset temperature is higher than the first preset temperature;

[0020] When it is determined that the temperature of the hydraulic oil is higher than the second preset temperature, the proportional valve is closed.

[0021] In an embodiment of the present application, the heating control method further includes:

[0022] The target opening of the proportional valve is determined according to the difference between the maximum output flow and the driving flow;

[0023] Adjust the opening of the proportional valve to the target opening.

[0024] In an embodiment of the present application, the heating control method further includes:

[0025] Determine the required overflow flow of the overflow valve according to the target opening;

[0026] Determine the target output flow of the hydraulic pump according to the driving flow and the overflow flow;

[0027] Adjust the output flow of the hydraulic pump to the target output flow.

[0028] In an embodiment of the present application, adjusting the output flow of the hydraulic pump to a target output flow includes:

[0029] The displacement of the hydraulic pump and / or the speed of the hydraulic pump are adjusted to adjust the output flow of the hydraulic pump to a target output flow.

[0030] A second aspect of the present application provides a processor configured to execute the above-mentioned heating control method for a hydraulic system.

[0031] A third aspect of the present application provides an engineering machine, comprising:

[0032] A hydraulic system, the hydraulic system comprising a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve, the hydraulic actuator being connected to the hydraulic pump via the main control valve, and the relief valve being connected to the hydraulic pump via the proportional valve; and

[0033] The processors described above.

[0034] In an embodiment of the present application, the hydraulic system further includes an operating element, which is connected to the main control valve and is used to adjust the opening of the main control valve.

[0035] In the embodiment of the present application, the engineering machinery further includes:

[0036] The temperature sensor is electrically connected to the processor and is used to detect the temperature of the hydraulic oil at the oil inlet of the hydraulic pump.

[0037] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, which, when executed by a processor, configure the processor to execute the above-mentioned heating control method for a hydraulic system.

[0038] Through the above technical scheme, that is, by arranging a proportional valve and an overflow valve in the hydraulic system, and the overflow valve is connected to the hydraulic pump through the proportional valve, by obtaining the maximum output flow of the hydraulic pump, the driving flow required by the hydraulic actuator is determined according to the opening of the main control valve, and it is determined whether the maximum output flow is greater than the driving flow. When it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil. In this way, since the heating oil circuit composed of the proportional valve and the overflow valve is arranged in parallel with the driving oil circuit composed of the main control valve and the hydraulic actuator, the hydraulic system can perform overflow heating and driving operations at the same time, and the hydraulic system gives priority to ensuring the flow supply of the hydraulic actuator, which can avoid affecting the normal driving operation due to overflow heating.

[0039] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0041] Figure 1 is a schematic diagram of the hydraulic structure of the hydraulic system provided in the embodiment of the present application;

[0042] Figure 2 is a flow chart of a heating control method for a hydraulic system provided in an embodiment of the present application;

[0043] Figure 3 is a flow chart of step S12 in the heating control method for a hydraulic system provided in an embodiment of the present application;

[0044] Figure 4 is a flow chart of step S14 in the heating control method for a hydraulic system provided in an embodiment of the present application;

[0045] Figure 5 is another flow chart of step S14 in the heating control method for a hydraulic system provided in an embodiment of the present application;

[0046] Figure 6 is another flow chart of a heating control method for a hydraulic system provided in an embodiment of the present application;

[0047] Figure 7 is another flow chart of a heating control method for a hydraulic system provided in an embodiment of the present application;

[0048] Figure 8 It is an internal structure diagram of the computer device provided in the embodiment of the present application.

[0049] Description of Reference Numerals

[0050] 1. Hydraulic pump; 2. Main control valve;

[0051] 3. Hydraulic actuator; 4. Proportional valve;

[0052] 5. Overflow valve. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] The embodiment of the present application mainly provides a heating control method for a hydraulic system. In order to more clearly explain the present solution, the structure of the hydraulic system is first described.

[0055] See also Figure 1 , Figure 1 Schematic diagram of the structure of the hydraulic system provided in the embodiment of the present application. Figure 1 As shown, in one embodiment of the present application, a hydraulic system is provided, which includes a hydraulic pump 1, a main control valve 2, a hydraulic actuator 3, a proportional valve 4 and a relief valve 5. The hydraulic actuator 3 is connected to the hydraulic pump 1 through the main control valve 2, and the relief valve 5 is connected to the hydraulic pump 1 through the proportional valve 4. The hydraulic pump 1 can be a fixed hydraulic pump or a variable hydraulic pump. The main control valve 2 can be a multi-way reversing valve. The valve plates of each reversing valve of the multi-way reversing valve are respectively connected to different hydraulic actuators (such as a slewing motor, a boom cylinder and a leg cylinder, etc.). The main control valve 2 and each hydraulic actuator constitute a driving oil circuit, and the action of each hydraulic actuator is controlled by the main control valve 2. The proportional valve 4 can be an electromagnetic proportional valve or a hydraulically controlled proportional valve. The proportional valve 4 and the relief valve 5 constitute a heating oil circuit, and the activation and closing of the heating oil circuit are controlled by the proportional valve 4. It can be understood that since the heating oil circuit composed of the proportional valve 4 and the overflow valve 5 is arranged in parallel with the driving oil circuit composed of the main control valve 2 and the hydraulic actuator 3, the hydraulic system can perform overflow heating and driving operations at the same time, thereby improving the heating efficiency of the hydraulic oil and reducing the operation waiting time.

[0056] Furthermore, the hydraulic system further includes an operating element (not shown), which is connected to the main control valve 2 and is used to adjust the opening of the main control valve 2. The operating element may be an operating handle, an operating button, or a remote controller. It is understood that the operator may issue an action command through the operating element to adjust the opening of the main control valve 2, thereby controlling the hydraulic actuator 3 to perform a corresponding action.

[0057] In summary, the embodiment of the present application first provides a hydraulic system to more clearly illustrate the heating control method to be provided by the embodiment of the present application. Therefore, those skilled in the art should understand that by replacing the hydraulic system with a different type or adding to the structure, as long as the hydraulic system has the function of performing overflow heating and driving operations at the same time, it can be applied to the heating control method for the hydraulic system provided in the embodiment of the present application, and should also fall within the scope of protection covered by the present application.

[0058] Based on this, the embodiment of the present application also provides a heating control method for a hydraulic system. Figure 2 , Figure 2 It is a flow chart of a heating control method for a hydraulic system provided in an embodiment of the present application. As can be seen from the above, the hydraulic system includes a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve. The hydraulic actuator is connected to the hydraulic pump through the main control valve, and the relief valve is connected to the hydraulic pump through the proportional valve. The control method may include:

[0059] Step S11: obtaining the maximum output flow of the hydraulic pump;

[0060] Step S12: determining the driving flow required by the hydraulic actuator according to the opening of the main control valve;

[0061] Step S13: Determine whether the maximum output flow is greater than the driving flow;

[0062] Step S14: when it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil.

[0063] Specifically, in step S11, the maximum output flow of the hydraulic pump can be determined according to the specification parameters of the hydraulic pump itself. In step S12, the opening of the main control valve can reflect the flow required for the current action of the hydraulic actuator. The larger the opening of the main control valve, the larger the flow required for the current action of the hydraulic actuator. The driving flow required by the hydraulic actuator can be determined according to the current opening of the main control valve. In steps S13 and S14, when the maximum output flow of the hydraulic pump is greater than the driving flow required by the hydraulic actuator, it indicates that the flow of the hydraulic system has a surplus flow in addition to the flow required by the hydraulic actuator. At this time, the proportional valve can be opened to allow the hydraulic oil to overflow through the overflow valve, thereby heating the hydraulic oil. In the above manner, the hydraulic system can perform overflow heating and driving operations at the same time, and the hydraulic system gives priority to ensuring the flow supply of the hydraulic actuator, which can avoid affecting the normal driving operation due to overflow heating.

[0064] Furthermore, according to the structure of the above hydraulic system, the hydraulic system also includes an operating element, which is connected to the main control valve and is used to adjust the opening of the main control valve. Figure 3 , Figure 3 1 is a flow chart of step S12 in the heating control method for a hydraulic system provided in an embodiment of the present application. Determining the driving flow required by the hydraulic actuator according to the opening of the main control valve in step S12 may include the following steps:

[0065] Step S121: determining the opening of the main control valve according to the operation of the operating element;

[0066] Step S122: Determine the driving flow required by the hydraulic actuator according to the opening of the main control valve.

[0067] Specifically, in step S121, there is a specific correspondence between the operation of the operating element and the opening of the main control valve, and the opening of the main control valve can be determined according to the operation of the operating element. The correspondence between the operation of the operating element and the opening of the main control valve can be obtained through experience and stored for reading and calling during control. Then, in step S122, the driving flow required by the hydraulic actuator is determined according to the opening of the main control valve.

[0068] See also Figure 4 , Figure 4 1 is a flow chart of step S14 in the heating control method for a hydraulic system provided in an embodiment of the present application. In step S14, when it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow to heat the hydraulic oil, which may include the following steps:

[0069] Step S141: when it is determined that the maximum output flow rate is greater than the driving flow rate, obtaining the hydraulic oil temperature at the oil inlet of the hydraulic pump;

[0070] Step S142: Determine whether the hydraulic oil temperature is lower than a first preset temperature;

[0071] Step S143: when it is determined that the temperature of the hydraulic oil is lower than the first preset temperature, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil.

[0072] Specifically, in step S141, the temperature of the hydraulic oil inside the hydraulic oil tank can be detected by a temperature sensor, wherein the temperature sensor can be set at the oil inlet of the hydraulic pump, so as to more accurately monitor the temperature change of the hydraulic oil in the hydraulic oil tank during the heating process. In step S142, the first preset temperature can be the lower limit of the hydraulic oil temperature for normal operation of the hydraulic system, which can be set according to actual experience, for example, it can be set to 20° to 60°, preferably to 35°. In step S143, when the hydraulic oil temperature is lower than the first preset temperature, the proportional valve is opened at this time, so that the hydraulic oil overflows through the overflow valve, thereby heating the hydraulic oil.

[0073] See also Figure 5 , Figure 5 It is another flow chart of step S14 in the heating control method for a hydraulic system provided in an embodiment of the present application. Based on steps S141 to S143, in step S14, when it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow so as to heat the hydraulic oil, and the following steps may also be included:

[0074] Step S144: determining whether the hydraulic oil temperature is higher than a second preset temperature, wherein the second preset temperature is higher than the first preset temperature;

[0075] Step S145: When it is determined that the hydraulic oil temperature is higher than the second preset temperature, the proportional valve is closed.

[0076] Specifically, in step S144, in order to avoid overheating of the hydraulic oil, it can be further determined during the heating process whether the hydraulic oil temperature is higher than a second preset temperature, wherein the second preset temperature can be an upper limit of the hydraulic oil temperature for normal operation of the hydraulic system, which can be set according to actual experience, for example, it can be set to 20° to 60°, preferably to 40°. In step S145, when the hydraulic oil temperature is higher than the second preset temperature, the proportional valve is closed to stop heating the hydraulic oil.

[0077] See also Figure 6 , Figure 6 1 is another flow chart of the heating control method for a hydraulic system provided in an embodiment of the present application. Based on step S11 to step S14, the heating control method may further include the following steps:

[0078] Step S15: determining the target opening of the proportional valve according to the difference between the maximum output flow and the driving flow;

[0079] Step S16: Adjust the opening of the proportional valve to the target opening.

[0080] Specifically, in step S15, the difference between the maximum output flow of the hydraulic pump and the driving flow required by the hydraulic actuator is the flow that the hydraulic system can allocate to the heating oil circuit. According to the size of the flow and the specification parameters of the relief valve itself, the target opening of the proportional valve can be calculated. Then in step S16, the opening of the proportional valve is adjusted to the target opening, and the flow capacity of the proportional valve core is controlled to control the flow entering the heating oil circuit to avoid affecting the action of the actuator. It can be understood that when the difference between the maximum output flow of the hydraulic pump and the driving flow required by the hydraulic actuator is greater than or equal to the maximum overflow flow of the overflow valve, the opening of the proportional valve is adjusted to the maximum, and the hydraulic system distributes flow to the heating oil circuit at the maximum overflow flow; when the difference between the maximum output flow of the hydraulic pump and the driving flow required by the hydraulic actuator is less than or equal to zero, the opening of the proportional valve is adjusted to the minimum (i.e., the proportional valve is closed), and the hydraulic system does not distribute flow to the heating oil circuit; when the difference between the maximum output flow of the hydraulic pump and the driving flow required by the hydraulic actuator is less than the maximum overflow flow of the overflow valve and greater than zero, the opening of the proportional valve is adjusted to the calculated target opening, and the hydraulic system distributes flow to the heating oil circuit in proportion.

[0081] In practical applications, assuming that the maximum output flow of the hydraulic pump is Qpmax, the driving flow required by the hydraulic actuator is Qd, the maximum overflow flow of the overflow valve is Qv, and the target opening of the proportional valve is Kh, then: Kh = (Qpmax-Qd) / Qv*100%, where Kh∈[0,1].

[0082] See also Figure 7 , Figure 7 is another flow chart of a heating control method for a hydraulic system provided in an embodiment of the present application. The heating control method may further include the following steps:

[0083] Step S17: determining the overflow flow required by the overflow valve according to the target opening;

[0084] Step S18: determining a target output flow of the hydraulic pump according to the driving flow and the overflow flow;

[0085] Step S19: adjusting the output flow of the hydraulic pump to the target output flow;

[0086] Specifically, in step S17, the overflow flow required by the overflow valve can be calculated in reverse according to the target opening of the proportional valve and the specification parameters of the overflow valve itself. In step S18, the sum of the driving flow required by the hydraulic actuator and the overflow flow required by the overflow valve is the output flow required by the hydraulic pump, that is, the target output flow. Then, in step S19, the output flow of the hydraulic pump is actively adjusted to reach the target output flow, which can not only improve the heating efficiency, but also reduce the energy consumption of the hydraulic system.

[0087] In actual application, assuming that the target output flow of the hydraulic pump is Qp, the driving flow required by the hydraulic actuator is Qd, the maximum overflow flow of the overflow valve is Qv, and the target opening of the proportional valve is Kh, then: Qp=Qv*Kh+Qd.

[0088] Further, in one embodiment, adjusting the output flow of the hydraulic pump to the target output flow in step S19 may include: adjusting the displacement of the hydraulic pump and / or the rotation speed of the hydraulic pump to adjust the output flow of the hydraulic pump to the target output flow.

[0089] Specifically, when the hydraulic pump is a fixed-displacement hydraulic pump, the speed of the hydraulic pump can be adjusted (specifically, this can be achieved by adjusting the speed of the engine), thereby adjusting the output flow of the hydraulic pump; when the hydraulic pump is a variable-displacement hydraulic pump, not only the speed of the hydraulic pump can be adjusted, but also the displacement of the hydraulic pump can be adjusted (specifically, this can be achieved by adjusting the displacement current of the hydraulic pump), thereby adjusting the output flow of the hydraulic pump.

[0090] Through the above technical scheme, that is, by arranging a proportional valve and an overflow valve in the hydraulic system, and the overflow valve is connected to the hydraulic pump through the proportional valve, by obtaining the maximum output flow of the hydraulic pump, the driving flow required by the hydraulic actuator is determined according to the opening of the main control valve, and it is determined whether the maximum output flow is greater than the driving flow. When it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil. In this way, since the heating oil circuit composed of the proportional valve and the overflow valve is arranged in parallel with the driving oil circuit composed of the main control valve and the hydraulic actuator, the hydraulic system can perform overflow heating and driving operations at the same time, and the hydraulic system gives priority to ensuring the flow supply of the hydraulic actuator, which can avoid affecting the normal driving operation due to overflow heating.

[0091] An embodiment of the present application also provides a processor, which is used to run a program, wherein the program executes a heating control method for a hydraulic system when it is running. The hydraulic system includes a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve. The hydraulic actuator is connected to the hydraulic pump through the main control valve, and the relief valve is connected to the hydraulic pump through the proportional valve. The heating control method includes the following steps: obtaining the maximum output flow of the hydraulic pump; determining the driving flow required by the hydraulic actuator according to the opening of the main control valve; determining whether the maximum output flow is greater than the driving flow; and when it is determined that the maximum output flow is greater than the driving flow, opening the proportional valve to allow the relief valve to overflow, so as to heat the hydraulic oil.

[0092] In one embodiment, the hydraulic system also includes an operating element, which is connected to the main control valve and is used to adjust the opening of the main control valve; determining the driving flow required by the hydraulic actuator according to the opening of the main control valve, including: determining the opening of the main control valve according to the operating conditions of the operating element; determining the driving flow required by the hydraulic actuator according to the opening of the main control valve.

[0093] In one embodiment, when it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow so as to heat the hydraulic oil, including: when it is determined that the maximum output flow is greater than the driving flow, obtaining the hydraulic oil temperature at the oil inlet of the hydraulic pump; determining whether the hydraulic oil temperature is lower than a first preset temperature; when it is determined that the hydraulic oil temperature is lower than the first preset temperature, opening the proportional valve to allow the overflow valve to overflow so as to heat the hydraulic oil.

[0094] In one embodiment, after determining that the hydraulic oil temperature is lower than a first temperature threshold, opening the proportional valve to allow the overflow valve to overflow to heat the hydraulic oil, the heating control method further includes: determining whether the hydraulic oil temperature is higher than a second preset temperature, wherein the second preset temperature is higher than the first preset temperature; and closing the proportional valve when determining that the hydraulic oil temperature is higher than the second preset temperature.

[0095] In one embodiment, the heating control method further includes: determining a target opening of the proportional valve according to a difference between a maximum output flow rate and a driving flow rate; and adjusting the opening of the proportional valve to the target opening.

[0096] In one embodiment, the heating control method further includes: determining the overflow flow required by the overflow valve according to the target opening; determining the target output flow of the hydraulic pump according to the driving flow and the overflow flow; and adjusting the output flow of the hydraulic pump to the target output flow.

[0097] In one embodiment, adjusting the output flow of the hydraulic pump to the target output flow includes: adjusting the displacement of the hydraulic pump and / or the rotation speed of the hydraulic pump to adjust the output flow of the hydraulic pump to the target output flow.

[0098] It should be noted that the specific process of the processor executing the above operations is detailed in the method embodiment and will not be repeated here.

[0099] Based on the hardware implementation of the above program module, and in order to implement the method of the embodiment of the present application, the embodiment of the present application further provides an engineering machine, including:

[0100] A hydraulic system, the hydraulic system comprising a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve, the hydraulic actuator being connected to the hydraulic pump via the main control valve, and the relief valve being connected to the hydraulic pump via the proportional valve; and

[0101] The processors described above.

[0102] In one embodiment, the hydraulic system further comprises:

[0103] An operating element is connected to the main control valve and is used to adjust the opening of the main control valve.

[0104] In one embodiment, the engineering machine further comprises:

[0105] The temperature sensor is electrically connected to the processor and is used to detect the temperature of the hydraulic oil at the oil inlet of the hydraulic pump.

[0106] In one embodiment, the engineering machine may further include:

[0107] Communication interface, which can exchange information with other devices (such as network equipment, terminals, etc.);

[0108] Memory is used to store computer programs that can be executed on the processor.

[0109] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the method provided by one or more technical solutions above can be implemented by adjusting kernel parameters.

[0110] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0111] In practical applications, the various components in the engineering machinery can be coupled together through a bus system. It can be understood that the bus system is used to achieve connection and communication between these components. In addition to the data bus, the bus system also includes a power bus, a control bus and a status signal bus.

[0112] The memory in the embodiment of the present application is used to store various types of data to support the operation of the engineering machine. Examples of such data include: any computer program used to operate on the engineering machine.

[0113] The method disclosed in the above embodiment of the present application can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0114] In an exemplary embodiment, the processor may be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), field programmable gate array (FPGA), general processor, controller, microcontroller (MCU), microprocessor, or other electronic components to execute the aforementioned method.

[0115] It can be understood that the memory of the embodiment of the present application can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD ROM); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), and direct RAMbus random access memory (DRRAM, Direct Rambus Random Access Memory).The memories described in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0116] An embodiment of the present application also provides a machine-readable storage medium, on which instructions are stored. The instructions are executed by a processor for a heating control method for a hydraulic system. The hydraulic system includes a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve. The hydraulic actuator is connected to the hydraulic pump through the main control valve, and the relief valve is connected to the hydraulic pump through the proportional valve. The heating control method includes the following steps: obtaining the maximum output flow of the hydraulic pump; determining the driving flow required by the hydraulic actuator according to the opening of the main control valve; determining whether the maximum output flow is greater than the driving flow; and when it is determined that the maximum output flow is greater than the driving flow, opening the proportional valve to allow the relief valve to overflow, so as to heat the hydraulic oil.

[0117] In one embodiment, the hydraulic system also includes an operating element, which is connected to the main control valve and is used to adjust the opening of the main control valve; determining the driving flow required by the hydraulic actuator according to the opening of the main control valve, including: determining the opening of the main control valve according to the operating conditions of the operating element; determining the driving flow required by the hydraulic actuator according to the opening of the main control valve.

[0118] In one embodiment, when it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow so as to heat the hydraulic oil, including: when it is determined that the maximum output flow is greater than the driving flow, obtaining the hydraulic oil temperature at the oil inlet of the hydraulic pump; determining whether the hydraulic oil temperature is lower than a first preset temperature; when it is determined that the hydraulic oil temperature is lower than the first preset temperature, opening the proportional valve to allow the overflow valve to overflow so as to heat the hydraulic oil.

[0119] In one embodiment, after determining that the hydraulic oil temperature is lower than a first temperature threshold, opening the proportional valve to allow the overflow valve to overflow to heat the hydraulic oil, the heating control method further includes: determining whether the hydraulic oil temperature is higher than a second preset temperature, wherein the second preset temperature is higher than the first preset temperature; and closing the proportional valve when determining that the hydraulic oil temperature is higher than the second preset temperature.

[0120] In one embodiment, the heating control method further includes: determining a target opening of the proportional valve according to a difference between a maximum output flow rate and a driving flow rate; and adjusting the opening of the proportional valve to the target opening.

[0121] In one embodiment, the heating control method further includes: determining the overflow flow required by the overflow valve according to the target opening; determining the target output flow of the hydraulic pump according to the driving flow and the overflow flow; and adjusting the output flow of the hydraulic pump to the target output flow.

[0122] In one embodiment, adjusting the output flow of the hydraulic pump to the target output flow includes: adjusting the displacement of the hydraulic pump and / or the rotation speed of the hydraulic pump to adjust the output flow of the hydraulic pump to the target output flow.

[0123] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 8 As shown. The computer device includes a processor A01, a network interface A02, a display screen A04, an input device A05 and a memory (not shown in the figure) connected through a system bus. Among them, the processor A01 of the computer device is used to provide computing and control capabilities. The memory of the computer device includes an internal memory A03 and a non-volatile storage medium A06. The non-volatile storage medium A06 stores an operating system B01 and a computer program B02. The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 in the non-volatile storage medium A06. The network interface A02 of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor A01, the method of any one of the above embodiments is implemented. The display screen A04 of the computer device can be a liquid crystal display or an electronic ink display, and the input device A05 of the computer device can be a touch layer covered on the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0124] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0125] An embodiment of the present application provides a device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, a method of any one of the above embodiments is implemented.

[0126] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing the method of initializing any one of the above embodiments.

[0127] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0128] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0129] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0130] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0131] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0132] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0133] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0134] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0135] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A heating control method for a hydraulic system, characterized in that: The hydraulic system includes a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve, the hydraulic actuator is connected to the hydraulic pump through the main control valve, the relief valve is connected to the hydraulic pump through the proportional valve, and the heating control method includes: Obtaining the maximum output flow of the hydraulic pump; Determining the driving flow required by the hydraulic actuator according to the opening of the main control valve; Determining whether the maximum output flow rate is greater than the driving flow rate; When it is determined that the maximum output flow is greater than the driving flow, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil.

2. The heating control method according to claim 1, characterized in that: The hydraulic system further comprises an operating element, which is connected to the main control valve and is used to adjust the opening of the main control valve; Determining the driving flow required by the hydraulic actuator according to the opening of the main control valve includes: determining the opening of the main control valve according to the operation condition of the operating element; The driving flow required by the hydraulic actuator is determined according to the opening degree of the main control valve.

3. The heating control method according to claim 1, characterized in that: When it is determined that the maximum output flow is greater than the driving flow, opening the proportional valve to allow the overflow valve to overflow so as to heat the hydraulic oil comprises: When it is determined that the maximum output flow rate is greater than the driving flow rate, obtaining the hydraulic oil temperature at the oil inlet of the hydraulic pump; determining whether the hydraulic oil temperature is lower than a first preset temperature; When it is determined that the temperature of the hydraulic oil is lower than the first preset temperature, the proportional valve is opened to allow the overflow valve to overflow, so as to heat the hydraulic oil.

4. The heating control method according to claim 3, characterized in that: After the proportional valve is opened to allow the overflow valve to overflow in order to heat the hydraulic oil when it is determined that the hydraulic oil temperature is lower than the first preset temperature, the heating control method further includes: determining whether the hydraulic oil temperature is higher than a second preset temperature, wherein the second preset temperature is higher than the first preset temperature; When it is determined that the hydraulic oil temperature is higher than the second preset temperature, the proportional valve is closed.

5. The heating control method according to claim 1, characterized in that: Also includes: Determining a target opening of the proportional valve according to a difference between the maximum output flow and the driving flow; The opening of the proportional valve is adjusted to the target opening.

6. The heating control method according to claim 5, characterized in that: Also includes: Determining the overflow flow required by the overflow valve according to the target opening; Determining a target output flow of the hydraulic pump according to the driving flow and the overflow flow; The output flow rate of the hydraulic pump is adjusted to the target output flow rate.

7. The heating control method according to claim 6, characterized in that: The step of adjusting the output flow of the hydraulic pump to the target output flow comprises: The displacement of the hydraulic pump and / or the rotation speed of the hydraulic pump are adjusted to adjust the output flow of the hydraulic pump to the target output flow.

8. A processor, characterized in that: The method is configured to execute the heating control method for a hydraulic system according to any one of claims 1 to 7.

9. An engineering machine, characterized in that: include: A hydraulic system, the hydraulic system comprising a hydraulic pump, a main control valve, a hydraulic actuator, a proportional valve and a relief valve, the hydraulic actuator being connected to the hydraulic pump via the main control valve, and the relief valve being connected to the hydraulic pump via the proportional valve; and A processor according to claim 8.

10. The construction machine according to claim 9, characterized in that: The hydraulic system further comprises an operating element, which is connected to the main control valve and is used to adjust the opening of the main control valve.

11. The engineering machine according to claim 9, characterized in that: Also includes: A temperature sensor is electrically connected to the processor and is used to detect the temperature of the hydraulic oil at the oil inlet of the hydraulic pump.

12. A machine-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by a processor, the processor is configured to execute the heating control method for a hydraulic system according to any one of claims 1 to 7.

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