Hydraulic energy supply device based on driving of automatic energy charging energy accumulator and using method of hydraulic energy supply device

Abstract

The invention discloses a hydraulic energy supply device based on driving of an automatic energy charging energy accumulator and a using method. The device comprises a hydraulic pump set, a hydraulic valve set, an energy accumulator unit, a sensor unit and a local control unit. The hydraulic valve group comprises a loading electromagnetic valve, a one-way valve and a pressure regulating valve, an oil outlet of the hydraulic pump is connected with an inlet of the one-way valve through the loading electromagnetic valve, an outlet of the one-way valve is connected with an oil inlet of the energy accumulator, and an oil outlet of the energy accumulator is connected with an inlet of the pressure regulating valve; the sensor unit comprises a hydraulic pump outlet pressure sensor and an energy accumulator pressure sensor; the hydraulic pump outlet pressure sensor is arranged between the loading electromagnetic valve and the one-way valve; the energy accumulator pressure sensor is arranged between an oil outlet of the energy accumulator and the pressure regulating valve, and the local control unit is in electric signal connection with the motor, the loading electromagnetic valve, the pressure regulating valve, the hydraulic pump outlet pressure sensor and the energy accumulator pressure sensor. Therefore, the energy accumulator can be used as an independent driving source to continuously supply energy.

Description

Technical Field

[0001] The present invention relates to a hydraulic energy supply device and a use method thereof, belonging to the technical field of hydraulic systems, and in particular to a hydraulic energy supply device driven by an automatic charging accumulator and a use method thereof. Background Art

[0002] In existing hydraulic energy supply systems, accumulators typically serve as auxiliary energy storage elements, working in conjunction with hydraulic pumps to power the actuators. Because accumulators have a physical upper limit to their energy storage capacity, their output pressure gradually decreases during continuous oil supply as the accumulated hydraulic oil is continuously discharged. This results in poor stability and accuracy in the accumulator's output pressure. Once the accumulator's output hydraulic oil pressure drops below the actuator's operating pressure threshold, the actuator ceases to operate normally. This makes it difficult for hydraulic energy supply systems to continuously supply energy using the accumulator as the sole drive source.

[0003] The Chinese patent application with application number 201420373266.6 and application date July 7, 2014 discloses a precision automatically controlled energy storage and pressure stabilizing device; it includes an accumulator and an oil circuit block, the accumulator is mounted on the oil circuit block, and the oil circuit block is provided with an oil circuit connected to the accumulator and has an oil inlet, an oil outlet and an actuator interface on its side; it also includes: a proportional pressure reducing valve, mounted on the side of the oil circuit block and connected to the oil circuit between the accumulator and the oil inlet; an electromagnetic reversing valve, mounted on the side of the oil circuit block and connected to the oil circuit between the proportional pressure reducing valve and the oil inlet and connected to the oil outlet; a first electromagnetic stop valve, mounted on the side of the oil circuit block and connected to the oil circuit between the accumulator and the proportional pressure reducing valve; and an accumulator pressure sensor, mounted on the side of the oil circuit block and connected to the oil circuit connected to the accumulator. Although this patent can realize automatic adjustment of the set pressure of the accumulator, it still has the following defects: The accumulator of this design cannot continuously supply energy as a single driving source.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects and problems of the prior art that the accumulator cannot be used as a separate driving source for continuous energy supply, and to provide a hydraulic energy supply device based on an automatic charging accumulator drive and a method of use in which the accumulator can be used as a separate driving source for continuous energy supply.

[0006] To achieve the above objectives, the technical solution of the present invention is: a hydraulic energy supply device driven by an automatic charging accumulator and a method of use, wherein the hydraulic energy supply device driven by the automatic charging accumulator includes a hydraulic pump group, a hydraulic valve group, an accumulator unit, a sensor unit, and a machine-side control unit; The hydraulic pump group includes a hydraulic pump, a motor, and a hydraulic oil tank; the input shaft of the hydraulic pump is connected to the output shaft of the motor, and the oil suction port of the hydraulic pump is connected to the hydraulic oil tank; The hydraulic valve group includes a loading solenoid valve, a one-way valve, and a pressure regulating valve, and the accumulator unit includes an accumulator; the oil outlet of the hydraulic pump is connected to the inlet of the one-way valve through the loading solenoid valve, the outlet of the one-way valve is connected to the oil inlet of the accumulator, and the oil outlet of the accumulator is connected to the inlet of the pressure regulating valve; The sensor unit includes a hydraulic pump outlet pressure sensor and an accumulator pressure sensor; the hydraulic pump outlet pressure sensor is arranged between the loading solenoid valve and the one-way valve; the accumulator pressure sensor is arranged between the oil outlet of the accumulator and the pressure regulating valve; The machine-side control unit is respectively connected to the motor, the loading solenoid valve, the pressure regulating valve, the hydraulic pump outlet pressure sensor, and the accumulator pressure sensor for electrical signals.

[0007] The hydraulic energy supply device based on the automatic charging accumulator drive also includes a wireless transmission unit and a remote monitoring unit; The wireless transmission unit is connected to the machine-side control unit through electrical signals, and the wireless transmission unit is connected to the remote monitoring unit through wireless communication.

[0008] The remote monitoring unit includes a human-computer interaction interface, a control element, and an alarm prompt device.

[0009] The pressure regulating valve is a proportional valve, and the outlet of the pressure regulating valve is connected to the actuator; The loading solenoid valve is a pilot-operated overflow valve.

[0010] The sensor unit also includes an oil temperature sensor and a liquid level sensor; The oil temperature sensor and the liquid level sensor are respectively arranged on the hydraulic oil tank, and the oil temperature sensor and the liquid level sensor are respectively connected to the machine-side control unit for electrical signal transmission.

[0011] The hydraulic energy supply device driven by the automatic charging accumulator also includes an outer shell, an accumulator and a motor are provided on the upper left side of the outer shell, a hydraulic pump and a hydraulic valve group are provided on the lower left side of the outer shell, an on-site control unit is provided on the upper right side of the outer shell, and a hydraulic oil tank is provided on the lower part of the on-site control unit.

[0012] The method of use comprises the following steps: Step 1: Execute self-test procedure on the hydraulic energy supply device. When the self-test is qualified, receive the oil supply demand pressure instruction of the actuator; Step 2: After receiving and analyzing the actuator oil supply demand pressure instruction, the on-board control unit obtains the output target pressure value of the accumulator; Step 3: The on-board control unit dynamically adjusts the opening of the pressure regulating valve according to the output target pressure value, so that the output pressure value of the accumulator is stabilized at the output target pressure value. At the same time, the on-board control unit monitors the value of the accumulator pressure sensor in real time and executes the following charging process: When the value of the accumulator pressure sensor meets the charging condition, the machine-side control unit starts the motor and loads the solenoid valve in sequence to charge the accumulator; When the value of the accumulator pressure sensor meets the charging end condition, the machine-side control unit turns off the loading solenoid valve and the motor in sequence, and the charging ends; Step 4: Repeat the charging process in step 3 until the hydraulic energy supply device fails or stops after completing the energy supply task.

[0013] In the first step, the self-test procedure for the hydraulic energy supply device is performed as follows: first, the machine-side control unit controls the motor to start, and after a delay of 3 seconds after the motor starts, the machine-side control unit automatically controls the loading solenoid valve to be energized to charge the accumulator. If the pressure value measured by the accumulator pressure sensor reaches the charging end setting value and lasts for more than 20 seconds, the self-test is determined to be qualified. Then, the machine-side control unit controls the loading solenoid valve to unload and the motor to stop. If the pressure value measured by the accumulator pressure sensor does not reach the charging end setting value and lasts for more than 1 minute, the self-test is determined to be unqualified, and a self-test fault alarm is triggered. Then, fault troubleshooting is performed. After the fault is eliminated, the self-test procedure is continued until the self-test is qualified.

[0014] In the third step, when the value of the accumulator pressure sensor meets the charging condition, the on-board control unit sequentially starts the motor and the loading solenoid valve to charge the accumulator. This means that when the value of the accumulator pressure sensor is less than the charging start setting value Ps and lasts for more than 5 seconds, the charging condition is met. At this time, the on-board control unit controls the motor to start. After a delay of 3 seconds after the motor starts, the on-board control unit controls the loading solenoid valve to be energized, and the hydraulic pump draws hydraulic oil from the hydraulic oil tank and pressurizes it. When the pressure of the hydraulic oil reaches the charging start setting value Ps, the pressurized hydraulic oil enters the accumulator through the loading solenoid valve and the one-way valve, thereby automatically charging the accumulator. In the third step, when the value of the accumulator pressure sensor meets the charging end condition, the machine-side control unit sequentially closes the loading solenoid valve and the motor. Charging end means that the machine-side control unit continuously monitors the value of the accumulator pressure sensor. When the value of the accumulator pressure sensor is greater than the charging end set value and lasts for more than 20 seconds, the charging end condition is met. At this time, the machine-side control unit first automatically controls the loading solenoid valve to lose power, and then controls the motor to stop, and the accumulator automatically ends charging.

[0015] In the fourth step, the failure of the hydraulic energy supply device means that: in the charging process, if the automatic charging process of the accumulator lasts for more than 1 minute and the value of the accumulator pressure sensor has not reached the charging end set value, the charging fails and the automatic charging failure alarm is triggered, and the fault is checked.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention relates to a hydraulic energy supply device driven by an automatic charging accumulator and a method for using the device, comprising a hydraulic pump group, a hydraulic valve group, an accumulator unit, a sensor unit, and a machine-side control unit. The hydraulic pump group comprises a hydraulic pump, a motor, and a hydraulic oil tank. The hydraulic valve group comprises a loading solenoid valve, a one-way valve, and a pressure regulating valve. The accumulator unit comprises an accumulator. The sensor unit comprises a hydraulic pump outlet pressure sensor and an accumulator pressure sensor. When in use, the machine-side control unit monitors the system status in real time through the sensor unit. When the accumulator outputs hydraulic oil to the actuator, the machine-side control unit determines the energy status inside the accumulator based on the pressure data fed back by the accumulator pressure sensor. If the pressure value fed back by the accumulator pressure sensor is lower than the preset charging start setting, the charging start setting is enabled. When the value Ps is reached, the on-board control unit controls the motor to start, which drives the hydraulic pump to start working. Then, the on-board control unit controls the loading solenoid valve to open, causing the hydraulic pump to draw hydraulic oil from the hydraulic oil tank and, after passing through the one-way valve, be transported to the accumulator for charging. When the accumulator pressure reaches the charging end set value, the on-board control unit first controls the loading solenoid valve to close, then stops the motor, ending the charging process. During operation, the device will automatically and continuously cycle through the charging process. Through real-time monitoring and intelligent control, it ensures that the accumulator always has sufficient energy to continuously supply energy to the actuator, improving the problem in traditional hydraulic systems where the accumulator's output pressure is unstable and cannot continuously supply energy to the actuator due to the physical upper limit of energy storage. Therefore, the accumulator of the present invention can be used as a separate drive source for continuous energy supply.

[0017] 2. In a hydraulic energy supply device and method for use based on an automatic charging accumulator, the accumulator's oil outlet is connected to the inlet of a pressure regulating valve, the outlet of the pressure regulating valve is connected to an actuator, and an on-board control unit is electrically connected to the pressure regulating valve. During use, the on-board control unit receives and analyzes the actuator's oil supply demand pressure command, accurately determines the accumulator's output target pressure value, and dynamically adjusts the opening of the pressure regulating valve based on the output target pressure value. By adjusting the hydraulic oil flow through the pressure regulating valve, the accumulator's output pressure value is stabilized at the output target pressure value. Simultaneously, the on-board control unit monitors the value of the accumulator's pressure sensor in real time. When the value of the accumulator's pressure sensor is less than a set value Ps for starting charging, the on-board control unit initiates a charging procedure for the accumulator, thereby promptly replenishing the accumulator's internal hydraulic oil to ensure that the accumulator can continuously, stably, and accurately output pressure. Therefore, the accumulator of the present invention can not only serve as a single driving source for continuous energy supply, but also has high output pressure stability and accuracy.

[0018] 3. In a hydraulic energy supply device driven by an automatic charging accumulator and its use method, a wireless transmission unit is electrically connected to an on-site control unit, which is wirelessly connected to a remote monitoring unit. During operation, the on-site control unit collects real-time monitoring data from the hydraulic pump outlet pressure sensor, accumulator pressure sensor, oil temperature sensor, and liquid level sensor, as well as operating status information from the motor, loading solenoid valve, and other devices, and transmits it to the remote monitoring unit via the wireless transmission unit. The remote monitoring unit's human-machine interface allows for intuitive monitoring of the device's status, and commands are issued through the remote monitoring unit's control elements, such as adjusting the accumulator's target pressure or switching the system's operating mode (automatic or manual). These commands are accurately transmitted to the on-site control unit via the wireless transmission unit, and the on-site control unit executes the corresponding commands, such as adjusting the opening of the pressure regulating valve or controlling the start and stop of the motor. This enables remote real-time monitoring and precise control, effectively reducing manual inspections and making it suitable for unmanned operations (e.g., in valve-open scenarios) and high-risk operations. Therefore, the present invention not only achieves high output pressure stability and accuracy, but also enables remote control.

[0019] 4. In a hydraulic energy supply device and method for use based on an automatically charged accumulator, the present invention comprises an accumulator pressure sensor disposed between the accumulator's oil outlet and the pressure regulating valve, and an on-site control unit electrically connects the motor, the loading solenoid valve, and the accumulator pressure sensor. During operation, the on-site control unit monitors the pressure data from the accumulator pressure sensor in real time. If the accumulator pressure is within a range that satisfies the actuator's operating requirements, the on-site control unit controls the motor to remain stopped, allowing the accumulator to directly supply oil to the actuator. When the accumulator pressure sensor detects a pressure value below a set value for starting charging (Ps), the on-site control unit starts the motor and then opens the loading solenoid valve, allowing the hydraulic pump to charge the accumulator. During the charging process, when the accumulator pressure reaches a set value for ending charging, the on-site control unit first closes the loading solenoid valve and then controls the motor to stop. Through intelligent control, the motor operates only when the accumulator needs to be replenished, avoiding continuous operation and achieving on-demand energy supply, effectively reducing the device's energy consumption. Therefore, the present invention not only enables remote control but also reduces energy consumption.

[0020] 5. In the hydraulic energy supply device driven by an automatic charging accumulator and its use method of the present invention, the sensor unit also includes an oil temperature sensor and a liquid level sensor. The oil temperature sensor and the liquid level sensor are respectively arranged on the hydraulic oil tank. The oil temperature sensor and the liquid level sensor are respectively connected to the machine-side control unit for electrical signals. When used, the oil temperature sensor monitors the oil temperature in the hydraulic oil tank in real time and feeds back the oil temperature data to the machine-side control unit. When the oil temperature data exceeds a preset threshold, the machine-side control unit activates an early warning mechanism to prompt maintenance personnel to promptly check for heat dissipation system failures to avoid problems such as decreased hydraulic oil viscosity and increased system leakage caused by high temperature. Before the device is started, the liquid level sensor monitors the oil tank level in the hydraulic oil tank in real time and feeds back the oil tank level data The information is fed to the on-board control unit. When the oil tank level falls below the minimum set value (i.e., the hydraulic pump suction port height), the device is prohibited from starting. During operation, if the oil tank level falls below the minimum set value (based on the reserved redundancy of the hydraulic pump suction port height), the on-board control unit activates an early warning mechanism, prompting maintenance personnel to replenish oil in a timely manner. When the oil tank level falls below the minimum set value (i.e., the hydraulic pump suction port height), the motor is forced to stop to prevent damage to the pump body due to cavitation. The coordinated control of the oil temperature sensor, liquid level sensor, and on-board control unit enables comprehensive monitoring of the hydraulic system's operating status, effectively preventing inefficient operation and equipment damage caused by abnormal oil temperature or oil leakage, improving the safety of the device's operation, and ensuring the long-term reliable operation of the device in unattended scenarios. Therefore, the present invention not only reduces energy consumption but also improves safety.

[0021] 6. In the present invention, a hydraulic energy supply device driven by an automatic charging accumulator and its use method are provided. The upper left portion of the outer shell is provided with an accumulator and a motor, the lower left portion of the outer shell is provided with a hydraulic pump and a hydraulic valve group, the upper right portion of the outer shell is provided with an on-board control unit, and the lower portion of the on-board control unit is provided with a hydraulic oil tank. During use, the outer shell compactly integrates the accumulator, motor, hydraulic pump, hydraulic valve group, on-board control unit, and hydraulic oil tank through a modular layout. This modular, integrated design reduces the overall size of the device and allows for flexible adaptation to batteries or external power sources, forming a highly integrated mobile hydraulic energy supply mechanism that meets the requirements of portable applications in scenarios such as unmanned operations and field operations, thereby enhancing the device's environmental adaptability and flexibility. Therefore, the present invention not only improves safety but also enhances flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural block diagram of the device of the present invention.

[0023] Figure 2 This is a self-check control logic diagram of the accumulator charging device of the present invention.

[0024] Figure 3 This is the accumulator automatic charging control logic diagram of the present invention.

[0025] Figure 4 It is a hydraulic principle diagram of the present invention.

[0026] Figure 5 It is a top view of the structure of the present invention.

[0027] Figure 6 It is a structural schematic diagram of the present invention.

[0028] Figure 7 It is a schematic structural diagram of the remote monitoring unit of the present invention.

[0029] Figure 8 It is a side view of the machine-side control unit of the present invention.

[0030] Figure 9 It is a structural schematic diagram of the machine-side control unit of the present invention.

[0031] In the figure: hydraulic pump group 1, hydraulic pump 11, motor 12, hydraulic oil tank 13, outer shell 14, hydraulic valve group 2, loading solenoid valve 21, one-way valve 22, pressure regulating valve 23, accumulator unit 3, accumulator 31, sensor unit 4, hydraulic pump outlet pressure sensor 41, accumulator pressure sensor 42, oil temperature sensor 43, liquid level sensor 44, machine-side control unit 5, remote monitoring unit 6, human-computer interaction interface 61, control element 62, alarm prompt device 63. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] See also Figure 1 — Figure 9 A hydraulic energy supply device driven by an automatic charging accumulator and a method of use thereof, wherein the hydraulic energy supply device driven by the automatic charging accumulator comprises a hydraulic pump group 1, a hydraulic valve group 2, an accumulator unit 3, a sensor unit 4, and a machine-side control unit 5; The hydraulic pump group 1 includes a hydraulic pump 11, a motor 12, and a hydraulic oil tank 13; the input shaft of the hydraulic pump 11 is connected to the output shaft of the motor 12, and the oil suction port of the hydraulic pump 11 is connected to the hydraulic oil tank 13; The hydraulic valve group 2 includes a loading solenoid valve 21, a one-way valve 22, and a pressure regulating valve 23. The accumulator unit 3 includes an accumulator 31. The oil outlet of the hydraulic pump 11 is connected to the inlet of the one-way valve 22 through the loading solenoid valve 21. The outlet of the one-way valve 22 is connected to the oil inlet of the accumulator 31. The oil outlet of the accumulator 31 is connected to the inlet of the pressure regulating valve 23. The sensor unit 4 includes a hydraulic pump outlet pressure sensor 41 and an accumulator pressure sensor 42; the hydraulic pump outlet pressure sensor 41 is arranged between the loading solenoid valve 21 and the one-way valve 22; the accumulator pressure sensor 42 is arranged between the oil outlet of the accumulator 31 and the pressure regulating valve 23; The machine-side control unit 5 is connected to the motor 12 , the loading solenoid valve 21 , the pressure regulating valve 23 , the hydraulic pump outlet pressure sensor 41 , and the accumulator pressure sensor 42 for electrical signals.

[0034] The hydraulic energy supply device based on the automatic charging accumulator drive further includes a wireless transmission unit and a remote monitoring unit 6; The wireless transmission unit is connected to the machine-side control unit 5 through electrical signal connection, and the wireless transmission unit is connected to the remote monitoring unit 6 through wireless communication.

[0035] The remote monitoring unit 6 includes a human-machine interaction interface 61 , a control element 62 , and an alarm prompt device 63 .

[0036] The pressure regulating valve 23 is a proportional valve, and the outlet of the pressure regulating valve 23 is connected to the actuator; The loading solenoid valve 21 is a pilot-operated overflow valve.

[0037] The sensor unit 4 also includes an oil temperature sensor 43 and a liquid level sensor 44; The oil temperature sensor 43 and the liquid level sensor 44 are respectively arranged on the hydraulic oil tank 13 , and the oil temperature sensor 43 and the liquid level sensor 44 are respectively connected to the machine-side control unit 5 for electrical signal communication.

[0038] The hydraulic energy supply device driven by the automatic charging accumulator also includes an outer shell 14, an accumulator 31 and a motor 12 are provided on the upper left side of the outer shell 14, a hydraulic pump 11 and a hydraulic valve group 2 are provided on the lower left side of the outer shell 14, an on-board control unit 5 is provided on the upper right side of the outer shell 14, and a hydraulic oil tank 13 is provided on the lower part of the on-board control unit 5.

[0039] The method of use comprises the following steps: Step 1: Execute self-test procedure on the hydraulic energy supply device. When the self-test is qualified, receive the oil supply demand pressure instruction of the actuator; Step 2: After receiving and analyzing the actuator oil supply demand pressure instruction, the on-board control unit 5 obtains the output target pressure value of the accumulator 31; Step 3: The on-board control unit 5 dynamically adjusts the opening of the pressure regulating valve 23 according to the output target pressure value, so that the output pressure value of the accumulator 31 is stabilized at the output target pressure value. At the same time, the on-board control unit 5 monitors the value of the accumulator pressure sensor 42 in real time and executes the following charging process: When the value of the accumulator pressure sensor 42 meets the charging condition, the machine-side control unit 5 starts the motor 12 and the loading solenoid valve 21 in sequence to charge the accumulator 31; When the value of the accumulator pressure sensor 42 meets the charging end condition, the machine-side control unit 5 sequentially closes the loading solenoid valve 21 and the motor 12, and the charging ends; Step 4: Repeat the charging process in step 3 until the hydraulic energy supply device fails or stops after completing the energy supply task.

[0040] In the first step, the self-test procedure for the hydraulic energy supply device is performed as follows: first, the machine-side control unit 5 controls the motor 12 to start, and after a delay of 3 seconds after the motor 12 starts, the machine-side control unit 5 automatically controls the loading solenoid valve 21 to be energized to charge the accumulator 31. If the pressure value measured by the accumulator pressure sensor 42 reaches the charging end setting value and lasts for more than 20 seconds, the self-test is determined to be qualified. Then, the machine-side control unit 5 controls the loading solenoid valve 21 to unload and the motor 12 to stop. If the pressure value measured by the accumulator pressure sensor 42 does not reach the charging end setting value and lasts for more than 1 minute, the self-test is determined to be unqualified, and a self-test fault alarm is triggered. Then, fault troubleshooting is performed. After the fault is eliminated, the self-test procedure is continued until the self-test is qualified.

[0041] In the third step, when the value of the accumulator pressure sensor 42 meets the charging condition, the machine-side control unit 5 sequentially starts the motor 12 and the loading solenoid valve 21 to charge the accumulator 31. This means that when the value of the accumulator pressure sensor 42 is less than the charging start setting value Ps and lasts for more than 5 seconds, the charging condition is met. At this time, the machine-side control unit 5 controls the motor 12 to start. After the motor 12 starts, the machine-side control unit 5 controls the loading solenoid valve 21 to be energized, and the hydraulic pump 11 draws hydraulic oil from the hydraulic oil tank 13 and pressurizes it. When the pressure of the hydraulic oil reaches the charging start setting value Ps, the pressurized hydraulic oil enters the accumulator 31 through the loading solenoid valve 21 and the one-way valve 22, thereby automatically charging the accumulator 31. In the third step, when the value of the accumulator pressure sensor 42 meets the charging end condition, the machine-side control unit 5 sequentially closes the loading solenoid valve 21 and the motor 12. Charging end means that the machine-side control unit 5 continuously monitors the value of the accumulator pressure sensor 42. When the value of the accumulator pressure sensor 42 is greater than the charging end set value and lasts for more than 20 seconds, the charging end condition is met. At this time, the machine-side control unit 5 first automatically controls the loading solenoid valve 21 to lose power, and then controls the motor 12 to stop, and the accumulator 31 automatically ends charging.

[0042] In the fourth step, the failure of the hydraulic energy supply device means that: in the charging process, if the automatic charging process of the accumulator 31 lasts for more than 1 minute and the value of the accumulator pressure sensor 42 has not reached the charging end set value, the charging fails and the automatic charging failure alarm is triggered, and the fault is checked.

[0043] The supplementary description of the present invention is as follows: In the present invention, the human-machine interaction interface 61 is preferably a touch screen, the control element 62 is a button, and the alarm prompt device 63 is a buzzer.

[0044] In the present invention, the loading solenoid valve 21 preferably includes a loading valve main valve port P, a loading valve main valve oil return port T, a loading valve pilot control port X, a first pilot valve oil port a, and a second pilot valve oil port b; the oil outlet of the hydraulic pump 11 is connected to the loading valve main valve port P, the loading valve main valve port P is connected to the inlet of the one-way valve 22, the loading valve main valve oil return port T and the second pilot valve oil port b are connected to the hydraulic oil tank 13 together, and the first pilot valve oil port a is connected to the loading valve pilot control port X.

[0045] In the present invention, the output target pressure value of the accumulator 31 is preferably smaller than the charging start setting value Ps, and the difference between the charging start setting value Ps and the charging end setting value is the allowable error.

[0046] The present invention preferably comprises a control module and a power module, wherein the power module supplies power, and the control module is respectively connected to the motor 12, the loading solenoid valve 21, the pressure regulating valve 23, the hydraulic pump outlet pressure sensor 41, the accumulator pressure sensor 42, the oil temperature sensor 43, and the liquid level sensor 44 by electrical signals, and the wireless transmission unit is connected to the control module by electrical signals.

[0047] In the preferred first step of the present invention, the actuator oil supply demand pressure instruction is: issuing the actuator oil supply demand pressure instruction via the remote monitoring unit 6 .

[0048] In the preferred embodiment of the present invention, in the second step, the engine-side control unit 5 receives and analyzes the actuator oil supply demand pressure instruction, which means that the control module of the engine-side control unit 5 receives and analyzes the actuator oil supply demand pressure instruction.

[0049] Example 1: See also Figure 1 — Figure 9 A hydraulic energy supply device driven by an automatic charging accumulator and a method of use thereof, the hydraulic energy supply device driven by the automatic charging accumulator comprising a hydraulic pump group 1, a hydraulic valve group 2, an accumulator unit 3, a sensor unit 4, and a machine-side control unit 5; the hydraulic pump group 1 comprises a hydraulic pump 11, a motor 12, and a hydraulic oil tank 13; the input shaft of the hydraulic pump 11 is connected to the output shaft of the motor 12, and the oil suction port of the hydraulic pump 11 is connected to the hydraulic oil tank 13; the hydraulic valve group 2 comprises a loading solenoid valve 21, a one-way valve 22, and a pressure regulating valve 23; the accumulator unit 3 comprises an accumulator 31; the oil outlet of the hydraulic pump 11 is connected to the one-way valve 21 through the loading solenoid valve 21. The inlet of the one-way valve 22 is connected, the outlet of the one-way valve 22 is connected to the oil inlet of the accumulator 31, and the oil outlet of the accumulator 31 is connected to the inlet of the pressure regulating valve 23; the sensor unit 4 includes a hydraulic pump outlet pressure sensor 41 and an accumulator pressure sensor 42; the hydraulic pump outlet pressure sensor 41 is arranged between the loading solenoid valve 21 and the one-way valve 22; the accumulator pressure sensor 42 is arranged between the oil outlet of the accumulator 31 and the pressure regulating valve 23; the machine-side control unit 5 is electrically connected to the motor 12, the loading solenoid valve 21, the pressure regulating valve 23, the hydraulic pump outlet pressure sensor 41, and the accumulator pressure sensor 42 respectively.

[0050] When in use, after the device is started, the accumulator 31 continuously supplies hydraulic oil to the actuator. The machine-side control unit 5 monitors the pressure data of the accumulator 31 in real time through the accumulator pressure sensor 42. If the pressure in the accumulator 31 is within the range that can meet the initial working requirements of the actuator, the machine-side control unit 5 will control the motor 12 to remain in a stopped state. At this time, the hydraulic oil output by the accumulator 31 flows to the actuator through the pressure regulating valve 23. The machine-side control unit 5 dynamically adjusts the opening of the pressure regulating valve 23 according to the actual needs of the actuator to ensure that the accumulator 31 The output hydraulic oil pressure is stable and accurately matches the working pressure of the actuator; as the actuator continues to work, the hydraulic oil in the accumulator 31 is continuously consumed, and its internal pressure gradually decreases. When the accumulator pressure sensor 42 detects that the pressure value is lower than the preset charging start setting value Ps, the machine-side control unit 5 controls the motor 12 to start, and then controls the loading solenoid valve 21 to be energized and loaded. The motor 12 drives the hydraulic pump 11 to start running, and the hydraulic pump 11 draws hydraulic oil from the hydraulic oil tank 13. The drawn hydraulic oil passes through the loading solenoid valve 21 and the one-way valve 2 in sequence. 2, and finally enters the accumulator 31 for charging. The one-way conduction characteristic of the check valve 22 effectively prevents hydraulic oil backflow, ensuring a stable and efficient charging process. During the charging process, the on-board control unit 5 continuously monitors the real-time data of the accumulator pressure sensor 42. When the data from the accumulator pressure sensor 42 (i.e., the pressure in the accumulator 31) reaches the set value for charging end, the on-board control unit 5 controls the loading solenoid valve 21 to close and then stops the operation of the motor 12, ending the charging process. During operation, the device will automatically and continuously cycle through the charging process. Through real-time monitoring and intelligent control, the accumulator 31 always maintains sufficient energy to stably supply energy to the actuator. This improves the problem of unstable output pressure and inability to continuously supply energy to the actuator in traditional hydraulic systems due to the physical upper limit of accumulator energy storage. In addition, during operation, the hydraulic pump outlet pressure sensor 41 monitors and provides feedback on the output pressure of the hydraulic pump 11 in real time. The on-board control unit 5 determines whether the hydraulic pump 11 is operating normally based on the value of the hydraulic pump outlet pressure sensor 41 to ensure the normal operation of the device.

[0051] Example 2: The basic content is the same as Example 1, except that: the hydraulic energy supply device driven by the automatic charging accumulator also includes a wireless transmission unit and a remote monitoring unit 6; the wireless transmission unit is connected to the machine-side control unit 5 by electrical signals, and the wireless transmission unit is connected to the remote monitoring unit 6 by wireless communication; the remote monitoring unit 6 includes a human-computer interaction interface 61, a control element 62, and an alarm prompt device 63.

[0052] During application, first, the machine-side control unit 5 collects the monitoring data of the hydraulic pump outlet pressure sensor 41, the accumulator pressure sensor 42, the oil temperature sensor 43 and the liquid level sensor 44 in real time, and sends the data together with the operating status information of the motor 12, the loading solenoid valve 21 and other equipment to the remote monitoring unit 6 in real time through the wireless transmission unit using the Profinet industrial Ethernet protocol; the human-machine interaction interface 61 of the remote monitoring unit 6 visualizes key data such as the system pressure curve, oil temperature fluctuation, and liquid level status through charts, numerical values ​​and status indicators, so that the operator can understand the equipment operation status in real time; the operator issues instructions through the control element 62, such as adjusting the accumulator target pressure, switching the system working mode (automatic or manual), etc.; in manual mode, the start and stop of the motor 12, the loading of the loading solenoid valve 21, or the issuance of device self-test instructions can also be independently controlled; these instructions are accurately transmitted via the wireless transmission unit After reaching the machine-side control unit 5, the machine-side control unit 5 executes corresponding instructions, such as driving the pressure regulating valve 23 to adjust the opening, controlling the start and stop of the motor 12, etc.; when an abnormality occurs in the system, such as the pressure of the accumulator 31 is lower than the charging start setting value Ps for a certain period of time, the oil temperature exceeds the threshold, and the liquid level drops to the low setting value (i.e., the hydraulic pump suction port height), the machine-side control unit 5 immediately triggers the alarm program, and through the wireless transmission unit, the alarm prompt device 63 of the remote monitoring unit 6 uses an audible and visual alarm combined with a red highlighted warning on the human-computer interaction interface 61 to synchronously display the alarm type and the location of the faulty equipment, helping the operator to quickly locate and deal with the problem; the entire wireless transmission and remote monitoring system realizes remote real-time monitoring and precise control, effectively reduces manual inspections, and is suitable for unmanned operation (such as valve normally open scenarios) and high-risk operations. It significantly improves the level and safety of intelligent operation and maintenance of equipment, and reduces labor costs and potential risks.

[0053] Example 3: The basic contents are the same as those of Example 1, except that: the pressure regulating valve 23 is a proportional valve, the outlet of the pressure regulating valve 23 is connected to the actuator; and the loading solenoid valve 21 is a pilot-operated relief valve.

[0054] When in use, the pressure regulating valve 23 acts as a proportional valve, receives the electrical signal from the machine-side control unit 5, and accurately adjusts the hydraulic oil pressure output by the accumulator 31 to the actuator through the built-in proportional control characteristic curve (the horizontal axis is the control current, the vertical axis is the valve outlet pressure); when the remote monitoring unit 6 sends the accumulator oil supply demand pressure instruction, the machine-side control unit 5 analyzes the instruction and outputs the corresponding electrical signal, so that the pressure regulating valve 23 dynamically adjusts the valve opening to stabilize the outlet pressure of the accumulator 31 at a set value that matches the actuator demand; the loading solenoid valve 21 acts as a pilot-operated relief valve. After the motor 12 is started, there is a delay of 3 seconds (to ensure the stability of the hydraulic system oil circuit). The loading solenoid valve 21 is energized, and the outlet pressure of the hydraulic pump 11 rises to its relief set value, and begins to charge the accumulator 31. This design utilizes the pressure control characteristics of the pilot-operated relief valve to achieve a smooth transition of the loading process of the hydraulic pump 11 and avoid damage to system components caused by sudden pressure changes; in automatic control mode, the machine-side control unit Element 5 automatically controls the energizing / de-energizing of the loading solenoid valve 21 based on real-time data from the accumulator pressure sensor 42. When the pressure value of the accumulator pressure sensor 42 falls below the charging start set value Ps, the loading solenoid valve 21 is energized and loaded, and the hydraulic pump 11 charges the accumulator 31. When the pressure reaches the charging end set value and persists for more than 20 seconds, the loading solenoid valve 21 is de-energized and unloaded, and the hydraulic pump stops operating. In manual mode, the operator can independently control the opening and closing of the loading solenoid valve 21 through the remote monitoring unit 6, flexibly adjusting the loading state of the hydraulic pump 11. The coordinated operation of the pressure regulating valve 23 and the loading solenoid valve 21, combined with the protection mechanism of the one-way valve 22 to prevent the backflow of high-pressure oil from the accumulator, ensures that the hydraulic system pressure is stable and controllable during charging and outputs pressure on demand during oil supply. This not only meets the power requirements of different working conditions, but also reduces system energy consumption through precise pressure control, avoids the motor from running continuously, improves the reliability and adaptability of the hydraulic power supply device, and reduces energy consumption.

[0055] Example 4: The basic content is the same as that of Example 1, except that: the sensor unit 4 also includes an oil temperature sensor 43 and a liquid level sensor 44; the oil temperature sensor 43 and the liquid level sensor 44 are respectively arranged on the hydraulic oil tank 13, and the oil temperature sensor 43 and the liquid level sensor 44 are respectively connected to the machine-side control unit 5 for electrical signal connection.

[0056] When in use, during operation, the oil temperature sensor 43 monitors the oil temperature in the hydraulic oil tank 13 in real time, and feeds back the oil temperature data to the machine-side control unit 5. When the oil temperature data exceeds the preset threshold, the machine-side control unit 5 starts the early warning mechanism, prompting maintenance personnel to promptly check the cooling system failure to avoid problems such as high temperature causing the viscosity of the hydraulic oil to decrease; at the same time, the liquid level sensor 44 monitors the oil tank level in the hydraulic oil tank 13 in real time, and feeds back the oil tank level data to the machine-side control unit 5. When the oil tank level data is lower than the low set value (based on the redundancy reserved for the height of the hydraulic pump suction port), the machine-side control unit 5 starts the early warning mechanism, prompting maintenance personnel to replenish oil in time. When the oil tank level data is lower than the low set value (based on the redundancy reserved for the height of the hydraulic pump suction port), the machine-side control unit 5 starts the early warning mechanism, prompting maintenance personnel to replenish oil in time. When the low set value is reached (i.e., the height of the hydraulic pump suction port), the motor 12 is forced to stop running to prevent damage to the pump body due to air suction; in addition, before the device is started, the liquid level sensor 44 monitors the oil tank level in the hydraulic oil tank 13 in real time, and feeds back the oil tank level data to the machine-side control unit 5. When the oil tank level data is lower than the low set value, the device is prohibited from starting; the oil temperature sensor 43, the liquid level sensor 44 and the machine-side control unit 5 work together to achieve comprehensive and real-time monitoring of the operating status of the hydraulic system, effectively preventing inefficient operation and equipment damage caused by abnormal oil temperature or oil leakage, improving the safety of the device operation, and ensuring the long-term and reliable operation of the device in unattended scenarios.

[0057] Example 5: The basic content is the same as that of Example 1, except that: the hydraulic energy supply device driven by the automatic charging accumulator also includes an outer shell 14, and the upper left part of the outer shell 14 is provided with an accumulator 31 and a motor 12, the lower left part of the outer shell 14 is provided with a hydraulic pump 11 and a hydraulic valve group 2, and the upper right part of the outer shell 14 is provided with an on-board control unit 5, and the lower part of the on-board control unit 5 is provided with a hydraulic oil tank 13.

[0058] During application, the accumulator 31, motor 12, hydraulic pump 11, hydraulic valve group 2, machine-side control unit 5 and hydraulic oil tank 13 are compactly integrated in the outer shell 14 through a modular layout. This modular integrated design significantly reduces the overall volume of the device. The device can be flexibly adapted to batteries or external power supplies to form a highly integrated mobile hydraulic energy supply mechanism, meeting the portable application requirements in scenarios such as unmanned operation and field operations, such as automated mining in unmanned mines and maintenance of field oil pipelines, thereby enhancing the environmental adaptability and flexibility of the device. In addition, the modular design makes the maintenance and repair of the device more convenient. When a component of the device fails, technicians can quickly locate the problem module.

[0059] Example 6: The basic content is the same as Example 1, except that the method of use includes the following steps: Step 1: Execute self-test procedure on the hydraulic energy supply device. When the self-test is qualified, receive the oil supply demand pressure instruction of the actuator; Step 2: After receiving and analyzing the actuator oil supply demand pressure instruction, the on-board control unit 5 obtains the output target pressure value of the accumulator 31; Step 3: The on-board control unit 5 dynamically adjusts the opening of the pressure regulating valve 23 according to the output target pressure value, so that the output pressure value of the accumulator 31 is stabilized at the output target pressure value. At the same time, the on-board control unit 5 monitors the value of the accumulator pressure sensor 42 in real time and executes the following charging process: When the value of the accumulator pressure sensor 42 meets the charging condition, the machine-side control unit 5 starts the motor 12 and the loading solenoid valve 21 in sequence to charge the accumulator 31; When the value of the accumulator pressure sensor 42 meets the charging end condition, the machine-side control unit 5 sequentially closes the loading solenoid valve 21 and the motor 12, and the charging ends; Step 4: Repeat the charging process in step 3 until the hydraulic energy supply device fails or stops after completing the energy supply task.

[0060] Example 7: The basic content is the same as that of Example 1, except that: in the first step, the self-test procedure for the hydraulic energy supply device is performed as follows: first, the machine-side control unit 5 controls the motor 12 to start. After the motor 12 starts, there is a delay of 3 seconds. The machine-side control unit 5 automatically controls the loading solenoid valve 21 to be energized to charge the accumulator 31. If the pressure value measured by the accumulator pressure sensor 42 reaches the charging end set value and lasts for more than 20 seconds, the self-test is determined to be passed. Then, the machine-side control unit 5 controls the loading solenoid valve 21 to unload and the motor 12 to stop. If the pressure value measured by the accumulator pressure sensor 42 does not reach the charging end set value and lasts for more than 1 minute, the self-test is determined to be unqualified, and a self-test fault alarm is triggered. Then, fault troubleshooting is performed. After the fault is eliminated, the self-test procedure is continued until the self-test is passed.

[0061] When used, the self-test program verifies whether the core functions of the accumulator 31, the hydraulic pump group 1, and the valve are normal by simulating the process of charging and maintaining pressure. This is crucial to ensuring the reliability of the device in actual operation, and can detect potential faults in advance and reduce losses caused by equipment failures. During the self-test process, if the accumulator pressure is not detected to reach the charging end set value within 1 minute, the self-test is judged to be unqualified. This is because under normal circumstances, according to the performance of the hydraulic pump and the design parameters of the accumulator, the accumulator should be able to reach the charging end pressure within 1 minute. If it fails to reach the pressure, it is likely that the hydraulic pump, the loading solenoid valve, etc. , accumulator and other components fail, such as internal wear of the hydraulic pump resulting in insufficient output flow, the loading solenoid valve cannot be opened normally so that the oil cannot smoothly enter the accumulator, and the accumulator itself has leakage. Through this 1-minute judgment, serious faults that may exist in the device under the initial operating state can be quickly identified, avoiding continuing to operate the equipment when the fault has not been eliminated, thereby ensuring the safe and stable operation of the equipment; in addition, the duration of self-test charging (1 minute in this article) is determined according to the flow of the hydraulic pump and the volume of the accumulator. The two have a matching relationship and can be determined according to actual working conditions.

[0062] Example 8: The basic content is the same as that of Example 1, except that: in the third step, when the value of the accumulator pressure sensor 42 meets the charging condition, the machine-side control unit 5 starts the motor 12 and the loading solenoid valve 21 in sequence to charge the accumulator 31. This means that when the value of the accumulator pressure sensor 42 is less than the charging start setting value Ps and lasts for more than 5 seconds, the charging condition is met. At this time, the machine-side control unit 5 controls the motor 12 to start. After the motor 12 starts, there is a delay of 3 seconds. The machine-side control unit 5 controls the loading solenoid valve 21 to be energized, and the hydraulic pump 11 draws hydraulic oil from the hydraulic oil tank 13 and pressurizes it. When the pressure of the hydraulic oil reaches the charging start setting value Ps, the pressurization The hydraulic oil then enters the accumulator 31 through the loading solenoid valve 21 and the one-way valve 22, automatically charging the accumulator 31. In the third step, when the value of the accumulator pressure sensor 42 meets the charging end condition, the machine-side control unit 5 sequentially closes the loading solenoid valve 21 and the motor 12. Charging end means that the machine-side control unit 5 continuously monitors the value of the accumulator pressure sensor 42. When the value of the accumulator pressure sensor 42 is greater than the charging end set value and lasts for more than 20 seconds, the charging end condition is met. At this time, the machine-side control unit 5 first automatically controls the loading solenoid valve 21 to lose power, and then controls the motor 12 to stop, and the automatic charging of the accumulator 31 is completed.

[0063] When applied, the motor 12 is delayed for 3 seconds after starting, and the machine-side control unit 5 controls the loading solenoid valve 21 to be energized. This is because it takes a certain amount of time for the motor 12 to reach a stable operating state from starting. At the moment the motor 12 starts, the current will be much larger than that in normal operation. If the loading solenoid valve 21 is immediately controlled to be energized when the motor 12 is not running stably, and the hydraulic pump 11 is loaded to work, it will bring a greater impact to the motor 12 and the hydraulic pump 11. On the one hand, excessive load may cause the motor 12 to overload, causing the motor 12 winding to heat up, accelerating insulation aging, and shortening the service life of the motor 12; on the other hand, it may also cause increased wear of the internal parts of the hydraulic pump 11, affecting the performance and reliability of the hydraulic pump 11. By setting a 3s delay, it can be ensured that the motor 12 is loaded after reaching a stable speed, so that the motor 12 and the hydraulic pump 11 can smoothly enter the working state, reduce the risk of equipment damage, and improve the stability and reliability of the system. The reason for setting it to 3s is that a delay time that is too long will affect the working efficiency, while a delay time that is too short will not ensure that the hydraulic oil circuit has been fully circulated; when the value of the accumulator pressure sensor 42 is less than the charging start setting value Ps and is required to last for more than 5s (determined according to the empirical value, it can also be 3-5s), it is determined that the charging conditions are met. This is to avoid false start-up due to instantaneous pressure fluctuations; in actual operation, the pressure sensor may be subject to external interference, such as the hydraulic oil in the hydraulic system Flow shock, mechanical vibration, etc., lead to short-term fluctuations in the pressure value; if no delay judgment is set, the charging process will be started only when the pressure is instantly lower than the charging start setting value Ps, which may cause the system to start and stop frequently. Frequent start and stop of the system will not only increase energy consumption, but also cause unnecessary wear and tear on equipment such as motors and solenoid valves, reducing the service life of the equipment. By setting a 5s delay judgment, these instantaneous pressure fluctuations can be effectively filtered out to ensure that the charging operation is started only when the accumulator pressure is indeed lower than the charging start setting value Ps and remains for a period of time, thereby ensuring the stable operation of the system; when the value of the accumulator pressure sensor 42 is greater than the charging end setting value and lasts for more than 20s, the charging operation is started. The determination of whether the charging end condition is met is because the pressure in the accumulator may fluctuate slightly due to factors such as the compressibility of the hydraulic oil and pressure fluctuations in the pipeline near the end of the charging process. If no delay is set, charging will be stopped immediately as soon as the pressure exceeds the charging end set value, which may result in insufficient accumulator charge. Setting a 20s delay can ensure that the pressure in the accumulator remains stable after reaching the charging end set value, so that the accumulator is fully charged and the accumulator stores enough energy to meet the working requirements of the actuator. In addition, the duration after reaching the charging end set value is adjusted according to different accumulator sizes and accumulator pressures and is not fixed at 20s.

[0064] Example 9: The basic content is the same as that of Example 1, except that: in the fourth step, the failure of the hydraulic energy supply device means that: in the charging process, if the automatic charging process of the accumulator 31 lasts for more than 1 minute and the value of the accumulator pressure sensor 42 has not reached the charging end set value, the charging fails, and the automatic charging failure alarm is triggered, and the fault is checked.

[0065] When applied, the fault detection mechanism based on dual judgment of time and pressure can timely and accurately discover possible problems of the hydraulic energy supply device in the charging link; when the machine-side control unit 5 detects that the automatic charging process of the accumulator 31 lasts for more than 1 minute, and the value of the accumulator pressure sensor 42 has not yet reached the charging end setting value, it is determined that the charging has failed and the automatic charging fault alarm is triggered. The machine-side control unit 5 transmits a signal to the remote monitoring unit 6 through the wireless transmission unit. After receiving the signal, the remote monitoring unit 6 displays it on its human-computer interaction interface 61 to remind personnel to check the fault.

[0066] Example 10: The basic content is the same as that of Example 1, except that: when starting the device, before the self-test procedure, the liquid level sensor 44 monitors the oil tank level in the hydraulic oil tank 13 in real time, and feeds back the oil tank level data to the machine-side control unit 5. When the oil tank level data is lower than the low set value, the device is prohibited from starting. At the same time, an alarm message is sent to the remote monitoring unit 6, and the alarm prompt device 63 (such as a buzzer) of the remote monitoring unit 6 performs an audible and visual alarm, and the human-computer interaction interface 61 (such as a touch screen) of the remote monitoring unit 6 is displayed to prompt the staff to add oil.

[0067] Example 11: The basic content is the same as that of Example 1, except that the human-machine interaction interface 61 (such as a touch screen) of the remote monitoring unit can issue a mode switching instruction. The mode switching instruction is used to switch the control mode of the system between automatic control and manual control. In the manual control mode, the hydraulic pump motor start and stop instructions, loading valve control instructions, self-test instructions, and accumulator outlet pressure setting instructions are valid. The control method in the manual control mode includes the following steps: Step 1: Set the system to manual control mode through the mode switch button on the human-machine interface 61 of the remote monitoring unit 6; the manual control mode is used for initialization, debugging and setting of each device in the system; Step 2: The remote monitoring unit 6 issues an outlet pressure setting command for the accumulator 31. After receiving the command, the on-board control unit 5 outputs a pressure proportional valve control signal to the accumulator pressure regulating valve 23 according to the built-in pressure proportional valve control curve, thereby adjusting the output oil pressure limit value of the accumulator 31. Step 3: When the system has no shutdown fault, the remote monitoring unit 6 issues a hydraulic pump motor start instruction, and the machine-side control unit 5 controls the motor 12 to start. Then, the remote monitoring unit 6 issues a loading instruction for the loading solenoid valve 21, and the machine-side control unit 5 outputs a control signal to control the loading solenoid valve 21 to be energized and loaded. The outlet pressure of the hydraulic pump 11 increases to the set value. The remote monitoring unit 6 issues an unloading instruction for the loading solenoid valve 21, and the machine-side control unit 5 controls the loading solenoid valve 21 to be de-energized and unloaded. Then, the remote monitoring unit 6 issues a stop instruction for the generator 12, and the motor 12 stops. Step 4: When the system has no shutdown fault, the remote monitoring unit 6 issues a system self-test command. After receiving the command, the machine-side control unit 5 automatically controls the motor 12 to start. After the motor 12 starts, there is a delay of 3 seconds, and the loading solenoid valve 21 is automatically controlled to be energized to charge the accumulator 31. If it is detected that the pressure of the accumulator 31 reaches the charging end setting value and lasts for more than 20 seconds, the loading solenoid valve 21 is controlled to be de-energized and unloaded, and the motor 12 automatically stops. The self-test of the machine-side control unit 5 is completed, and the "self-test passed" information is reported to the remote monitoring unit 6 for display. If the accumulator 31 pressure is not detected to reach the charging end setting value within 1 minute, the "self-test fault" information is reported to the remote monitoring unit 6 for display to remind personnel to check the fault.

[0068] Example 12: The basic content is the same as that of Example 11, except that: the human-machine interaction interface 61 (such as a touch screen) of the remote monitoring unit 6 issues a mode switching instruction to set the system to automatic control mode; in automatic control mode, the machine-side control unit 5 monitors the data of the accumulator pressure sensor 42 in real time. When the accumulator pressure value is less than the charging start setting value Ps and lasts for more than 5 seconds, the machine-side control unit 5 controls the motor 12 to start, delays for 3 seconds after the main pump motor starts, controls the loading solenoid valve 21 to be energized, and starts the automatic charging of the accumulator 31; thereafter, the machine-side control unit 5 continuously monitors the data of the accumulator pressure sensor 42. When the accumulator pressure value is less than the charging start setting value Ps and lasts for more than 5 seconds, the machine-side control unit 5 controls the motor 12 to start, delays for 3 seconds after the main pump motor starts, controls the loading solenoid valve 21 to be energized, and starts the automatic charging of the accumulator 31; If the pressure is greater than the charging end set value and lasts for more than 20 seconds, it means that the accumulator 31 has completed automatic charging. The on-board control unit 5 first automatically controls the loading solenoid valve 21 to lose power and then controls the motor 12 to stop. If the automatic charging process of the accumulator lasts for more than 1 minute and the pressure value of the accumulator 31 still does not reach the charging end pressure, it means that the accumulator 31 has failed to charge. The on-board control unit 5 reports the "automatic charging failure" information to the remote monitoring unit 6 to remind personnel to troubleshoot the fault. During the subsequent continuous oil supply process of the accumulator, the on-board control unit will automatically repeat the above charging action based on the monitored accumulator pressure sensor value, without the need for manual operation.

[0069] Example 13: The basic content is the same as that of embodiment 1, except that: the motor 12 is an AC asynchronous motor, the control module of the machine-side control unit 5 is a PLC, and the machine-side control unit 5 further includes a proportional valve controller.

[0070] When in use, the signal of the pressure regulating valve 23 is transmitted to the PLC through the proportional valve controller. After the PLC receives and analyzes the oil supply demand pressure instruction of the regulating actuator issued by the remote monitoring unit 6, it is transmitted to the pressure regulating valve 23 through the proportional valve controller. By dynamically adjusting the opening of the pressure regulating valve 23, the output pressure value of the accumulator 31 is adjusted.

[0071] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A hydraulic energy supply device driven by an automatic charging accumulator, characterized in that: The hydraulic energy supply device driven by the automatic charging accumulator comprises a hydraulic pump group (1), a hydraulic valve group (2), an accumulator unit (3), a sensor unit (4), and a machine-side control unit (5); The hydraulic pump assembly (1) comprises a hydraulic pump (11), a motor (12), and a hydraulic oil tank (13); the input shaft of the hydraulic pump (11) is connected to the output shaft of the motor (12), and the oil suction port of the hydraulic pump (11) is connected to the hydraulic oil tank (13); The hydraulic valve group (2) includes a loading solenoid valve (21), a one-way valve (22), and a pressure regulating valve (23); the accumulator unit (3) includes an accumulator (31); the oil outlet of the hydraulic pump (11) is connected to the inlet of the one-way valve (22) through the loading solenoid valve (21); the outlet of the one-way valve (22) is connected to the oil inlet of the accumulator (31); and the oil outlet of the accumulator (31) is connected to the inlet of the pressure regulating valve (23); The sensor unit (4) includes a hydraulic pump outlet pressure sensor (41) and an accumulator pressure sensor (42); the hydraulic pump outlet pressure sensor (41) is arranged between the loading solenoid valve (21) and the one-way valve (22); the accumulator pressure sensor (42) is arranged between the oil outlet of the accumulator (31) and the pressure regulating valve (23); The machine-side control unit (5) is respectively connected to the motor (12), the loading solenoid valve (21), the pressure regulating valve (23), the hydraulic pump outlet pressure sensor (41), and the accumulator pressure sensor (42) for electrical signals.

2. A hydraulic energy supply device driven by an automatic charging accumulator according to claim 1, characterized in that: The hydraulic energy supply device based on the automatic charging accumulator drive further includes a wireless transmission unit and a remote monitoring unit (6); The wireless transmission unit is connected to the machine-side control unit (5) through electrical signal communication, and the wireless transmission unit is connected to the remote monitoring unit (6) through wireless communication.

3. A hydraulic energy supply device driven by an automatic charging accumulator according to claim 2, characterized in that: The remote monitoring unit (6) comprises a human-machine interaction interface (61), a control element (62), and an alarm prompt device (63).

4. The hydraulic energy supply device driven by an automatic charging accumulator according to claim 1, characterized in that: The pressure regulating valve (23) is a proportional valve, and the outlet of the pressure regulating valve (23) is connected to the actuator; The loading solenoid valve (21) is a pilot-operated overflow valve.

5. The hydraulic energy supply device driven by an automatic charging accumulator according to claim 1, characterized in that: The sensor unit (4) further includes an oil temperature sensor (43) and a liquid level sensor (44); The oil temperature sensor (43) and the liquid level sensor (44) are respectively arranged on the hydraulic oil tank (13), and the oil temperature sensor (43) and the liquid level sensor (44) are respectively connected to the machine-side control unit (5) for electrical signal transmission.

6. The hydraulic energy supply device driven by an automatic charging accumulator according to claim 1, characterized in that: The hydraulic energy supply device driven by the automatic charging accumulator further comprises an outer shell (14), an accumulator (31) and a motor (12) are provided at the upper left portion of the outer shell (14), a hydraulic pump (11) and a hydraulic valve group (2) are provided at the lower left portion of the outer shell (14), an on-board control unit (5) is provided at the upper right portion of the outer shell (14), and a hydraulic oil tank (13) is provided at the lower portion of the on-board control unit (5).

7. A method for using the hydraulic energy supply device driven by the automatic charging accumulator according to claim 1, characterized in that: The method of use comprises the following steps: Step 1: Execute self-test procedure on the hydraulic energy supply device. When the self-test is qualified, receive the oil supply demand pressure instruction of the actuator; Step 2: The on-board control unit (5) receives and analyzes the actuator oil supply demand pressure instruction, and obtains the output target pressure value of the accumulator (31); Step 3: The on-board control unit (5) dynamically adjusts the opening of the pressure regulating valve (23) according to the output target pressure value, so that the output pressure value of the accumulator (31) is stabilized at the output target pressure value; at the same time, the on-board control unit (5) monitors the value of the accumulator pressure sensor (42) in real time and executes the following charging process: When the value of the accumulator pressure sensor (42) meets the charging condition, the machine-side control unit (5) starts the motor (12) and the loading solenoid valve (21) in sequence to charge the accumulator (31); When the value of the accumulator pressure sensor (42) meets the charging end condition, the machine-side control unit (5) sequentially closes the loading solenoid valve (21) and the motor (12), and the charging ends; Step 4: Repeat the charging process in step 3 until the hydraulic energy supply device fails or stops after completing the energy supply task.

8. The method for using a hydraulic energy supply device driven by an automatic charging accumulator according to claim 7, characterized in that: In the first step, the self-test procedure for the hydraulic energy supply device is as follows: first, the machine-side control unit (5) controls the motor (12) to start, and after the motor (12) starts, there is a delay of 3 seconds, and the machine-side control unit (5) automatically controls the loading solenoid valve (21) to be energized to charge the accumulator (31). If the pressure value measured by the accumulator pressure sensor (42) reaches the charging end set value and lasts for more than 20 seconds, it is determined that the self-test is qualified. Then, the machine-side control unit (5) controls the loading solenoid valve (21) to unload and the motor (12) to stop. If the pressure value measured by the accumulator pressure sensor (42) does not reach the charging end set value and lasts for more than 1 minute, it is determined that the self-test is unqualified, and a self-test fault alarm is triggered, and then the fault is checked. After the fault is eliminated, the self-test procedure is continued until the self-test is qualified.

9. The method for using a hydraulic energy supply device driven by an automatic charging accumulator according to claim 7, characterized in that: In the third step, when the value of the accumulator pressure sensor (42) satisfies the charging condition, the machine-side control unit (5) sequentially starts the motor (12) and the loading solenoid valve (21), and charges the accumulator (31). This means that when the value of the accumulator pressure sensor (42) is less than the charging start setting value Ps and lasts for more than 5 seconds, the charging condition is met. At this time, the machine-side control unit (5) controls the motor (12) to start. After the motor (12) starts, the delay is 3 seconds. The machine-side control unit (5) controls the loading solenoid valve (21) to be energized, and the hydraulic pump (11) draws hydraulic oil from the hydraulic oil tank (13) and pressurizes it. When the pressure of the hydraulic oil reaches the charging start setting value Ps, the pressurized hydraulic oil enters the accumulator (31) through the loading solenoid valve (21) and the one-way valve (22), and automatically charges the accumulator (31). In the third step, when the value of the accumulator pressure sensor (42) satisfies the charging end condition, the machine-side control unit (5) sequentially closes the loading solenoid valve (21) and the motor (12). Charging end means that the machine-side control unit (5) continuously monitors the value of the accumulator pressure sensor (42). When the value of the accumulator pressure sensor (42) is greater than the charging end set value and lasts for more than 20 seconds, the charging end condition is met. At this time, the machine-side control unit (5) first automatically controls the loading solenoid valve (21) to lose power, and then controls the motor (12) to stop, and the accumulator (31) automatically ends charging.

10. The method for using a hydraulic energy supply device driven by an automatic charging accumulator according to claim 7, characterized in that: In the fourth step, the hydraulic energy supply device fails when, during the charging process, the accumulator (31) automatically charges for more than 1 minute and the value of the accumulator pressure sensor (42) has not yet reached the charging end set value, the charging fails and an automatic charging failure alarm is triggered for troubleshooting.

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