A method, system, storage medium, and device for controlling the flow of an excavator breaker hammer.

Abstract

This invention discloses a flow control method, system, storage medium, and device for excavator breakers. The invention adopts a current-to-break level correlation control approach, linking the main pump current with the break level. It is no longer subject to constant power limitation, but only sets a maximum power (i.e., the current engine power) for monitoring. When the nitrogen pressure increases with the impact work, if the current output power of the main pump is less than the current engine power and the difference between the two is greater than a threshold, the main pump current is not adjusted, ensuring that the output flow is basically stable, thereby ensuring a constant break frequency.

Description

Technical Field

[0001] This invention relates to a flow control method, system, storage medium, and device for excavator hydraulic hammers, belonging to the technical field of hydraulic systems for construction machinery. Background Technology

[0002] The current control strategy for excavator crushing is directly transplanted from the excavation control strategy, namely constant power control. Under crushing conditions, since the load is mainly a steady-state cyclic load (the hydraulic driving pressure mainly comes from the nitrogen pressure of the accumulator), the nitrogen chamber will generate a temperature rise due to this cyclic reciprocating motion. When the temperature rises, since the volume of the nitrogen chamber remains unchanged, the gas pressure will increase, which will cause the overall pump pressure to rise. The constant power crushing program will reduce the flow rate due to the increase in pressure. This is manifested in the excavator operator feeling that the frequency of the breaker hammer will gradually decrease. Summary of the Invention

[0003] This invention provides a method, system, storage medium, and device for controlling the flow of an excavator breaker hammer, which solves the problems disclosed in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A method for controlling the flow rate of an excavator breaker hammer includes:

[0006] In response to the detection of a crushing operation requirement, a preset current adapted to the input crushing level is obtained and transmitted to the main pump;

[0007] In response to the detection of an increase in main pump pressure, the current output power of the main pump is calculated based on the current pressure of the main pump and the preset current.

[0008] If the current output power of the main pump is less than the current power of the engine, and the difference between the two is greater than the threshold, the preset current transmitted to the main pump remains unchanged.

[0009] If the current output power of the main pump is less than the current power of the engine, and the difference between the two is not greater than the threshold, a new preset current is transmitted to the main pump; wherein, the new preset current is adapted to the new input crushing level, and the new input crushing level is less than the original input crushing level.

[0010] It also includes a step to detect whether there is a need for crushing operations, which includes:

[0011] Collect the foot valve pilot signal and detect whether there is a need for crushing operation based on the foot valve pilot signal.

[0012] If the current output power of the main pump is less than the current output power of the engine, and the difference between the two is not greater than a threshold, a new preset current is transmitted to the main pump, including:

[0013] If the current output power of the main pump is less than the current power of the engine, and the difference between the two is not greater than the threshold, an alarm signal for high crushing power will be output.

[0014] In response to receiving a new input crushing level, a new preset current adapted to the new input crushing level is obtained and transmitted to the main pump.

[0015] The crushing level is input via the display screen, and alarm signals are displayed via the display screen.

[0016] A flow control system for an excavator breaker hammer, comprising:

[0017] The current adaptation module, in response to the detection of a crushing operation requirement, acquires a preset current that matches the input crushing level and transmits the preset current to the main pump.

[0018] The power calculation module, in response to the detection of an increase in main pump pressure, calculates the current output power of the main pump based on the current main pump pressure and the preset current;

[0019] The first judgment module determines that if the current output power of the main pump is less than the current power of the engine and the difference between the two is greater than the threshold, the preset current transmitted to the main pump remains unchanged.

[0020] The second judgment module, if the current output power of the main pump is less than the current power of the engine and the difference between the two is not greater than the threshold, will transmit a new preset current to the main pump; wherein, the new preset current is adapted to the new input crushing level, and the new input crushing level is less than the original input crushing level.

[0021] It also includes a detection module, which is configured as follows:

[0022] Collect the foot valve pilot signal and detect whether there is a need for crushing operation based on the foot valve pilot signal.

[0023] The second judgment module is configured as follows:

[0024] If the current output power of the main pump is less than the current power of the engine, and the difference between the two is not greater than the threshold, an alarm signal for high crushing power will be output.

[0025] In response to receiving a new input crushing level, a new preset current adapted to the new input crushing level is obtained and transmitted to the main pump.

[0026] The crushing level is input via the display screen, and alarm signals are displayed via the display screen.

[0027] A computer-readable storage medium storing one or more programs, the one or more programs including instructions that, when executed by a computing device, cause the computing device to perform an excavator breaker flow control method.

[0028] A computer device includes one or more processors and one or more memories, wherein one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs including instructions for performing a flow control method for an excavator breaker.

[0029] The beneficial effects achieved by this invention are as follows: This invention adopts the control concept of current and crushing level correlation, which correlates the main pump current with the crushing level. It is no longer limited by constant power, but only sets a maximum power (i.e. the current power of the engine) for monitoring. When the nitrogen pressure increases with the impact work, if the current output power of the main pump is less than the current power of the engine and the difference between the two is greater than the threshold, the main pump current will not be adjusted, so as to ensure that the output flow is basically stable, thereby ensuring the constant crushing frequency. Attached Figure Description

[0030] Figure 1 A flowchart of the flow control method for excavator hydraulic breakers;

[0031] Figure 2 This is a schematic diagram of the flow control device for an excavator breaker hammer. Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0033] like Figure 1 As shown, a flow control method for an excavator breaker hammer includes the following steps:

[0034] Step 1: In response to the detection of a crushing operation requirement, a preset current that matches the input crushing level is obtained and transmitted to the main pump.

[0035] Step 2: In response to the detection of an increase in main pump pressure, calculate the current output power of the main pump based on the current pressure of the main pump and the preset current.

[0036] Step 3: If the current output power of the main pump is less than the current power of the engine and the difference between the two is greater than the threshold, the preset current transmitted to the main pump remains unchanged; if the current output power of the main pump is less than the current power of the engine and the difference between the two is not greater than the threshold, a new preset current is transmitted to the main pump; wherein, the new preset current is adapted to the new input crushing level, and the new input crushing level is less than the original input crushing level.

[0037] The above method adopts the idea of ​​current-to-crushing-level correlation control, which links the main pump current with the crushing level. It is no longer limited by constant power, but only sets a maximum power (i.e. the current power of the engine) for monitoring. When the nitrogen pressure rises with the impact work, if the current output power of the main pump is less than the current power of the engine and the difference between the two is greater than the threshold, the main pump current will not be adjusted to ensure that the output flow is basically stable, thereby ensuring the constant crushing frequency.

[0038] like Figure 2 The apparatus shown is for implementing the above method and mainly includes a display, controller, engine, main pump, reversing valve, oil tank, breaker hammer, nitrogen chamber, and foot valve.

[0039] The main display is located in the cab. The operator switches to the crushing mode through the display and changes the crushing level on the display. The crushing level is the input value of the crushing system, which is used to determine a crushing current value that matches the gear. Once this value is set, the crushing current is determined. Then, the operator determines whether the current value needs to be adjusted based on the power (mainly pump pressure).

[0040] The engine serves as the primary power source, providing the power output for the entire machine.

[0041] The main pump converts the engine's mechanical energy into hydraulic pressure energy and receives current from the control system to adjust the swashplate angle, thereby controlling the output flow rate.

[0042] As a switching valve in the hydraulic system, the directional valve is pushed by the pilot pressure to switch the direction, so that the hydraulic oil flows into the breaker through the main pump.

[0043] The oil tank serves as a storage space for hydraulic oil, providing an ample supply of hydraulic oil.

[0044] A hydraulic breaker mainly consists of components such as a piston, a reversing valve, and an accumulator. The accumulator is mainly used to store the energy of the piston's upward movement and release it during the downward impact stroke. This working principle means that when the piston moves upward, the nitrogen gas in the accumulator is compressed and does work, generating heat, which in turn causes the nitrogen gas pressure in the accumulator to rise. Here, the accumulator mainly refers to the accumulator contained in the hydraulic breaker.

[0045] The foot valve is mainly a pilot switching valve in the crushing operation. The foot valve inlet is connected to a stable pilot pump pressure. When the foot valve is pressed and activated, the pilot oil pushes the reversing valve to switch through the oil circuit. At the same time, the pressure sensor on the foot valve collects the signal and feeds the signal back to the controller. The controller outputs current to drive the main pump swashplate to tilt, thereby realizing the oil supply to the breaker hammer.

[0046] The above method is mainly implemented in the controller.

[0047] The controller collects the foot valve pilot signal and detects whether there is a crushing operation requirement based on the foot valve pilot signal. If there is a crushing operation requirement and the crushing requirement is met, the controller obtains the appropriate preset current based on the crushing level input on the display and transmits the preset current to the main pump, so that the main pump works at the set opening. In the controller, some mapping relationships are pre-stored, that is, the main pump current corresponding to each crushing level.

[0048] The controller monitors the main pump pressure signal and engine power in real time. When the main pump pressure increases, it calculates the current output power of the main pump based on the current pressure and preset current. It then compares the current output power of the main pump with the current power of the engine. If the current output power of the main pump is less than the current power of the engine, and the difference between the two is greater than a threshold (this threshold is generally determined by the manufacturer; the higher the value, the higher the engine reserve, and the lower the value, the closer the engine is to its limit), the preset current transmitted to the main pump remains unchanged, that is, the main pump current remains unchanged to ensure stable crushing flow. If the current output power of the main pump is less than the current power of the engine, and the difference between the two is not greater than the threshold, that is, close to the current power of the engine, it sends an alarm signal of high crushing power to the display, reminding the user to actively reduce the crushing level, that is, to re-enter a new crushing level through the display, and transmit a new preset current adapted to the new crushing level to the main pump.

[0049] During crushing operations, the hydraulic system pushes the piston of the breaker upward, thereby compressing the nitrogen chamber. The work done on the nitrogen chamber causes a rise in nitrogen temperature. According to the ideal gas equation, as the temperature of a stationary gas space increases, the gas pressure will increase proportionally. This increase in gas pressure will cause the main pump pressure to rise. The above method can maximize the stability of the crushing flow rate within the range allowed by the engine power, without causing a decrease in flow rate.

[0050] Based on the same technical solution, this invention also discloses a corresponding software system for the above method: a flow control system for an excavator breaker hammer, comprising:

[0051] The detection module collects the foot valve pilot signal and detects whether there is a need for crushing operations based on the foot valve pilot signal.

[0052] The current adaptation module, in response to the detection of a crushing operation requirement, acquires a preset current that matches the input crushing level and transmits the preset current to the main pump.

[0053] The power calculation module, in response to the detection of an increase in main pump pressure, calculates the current output power of the main pump based on the current main pump pressure and the preset current;

[0054] The first judgment module determines that if the current output power of the main pump is less than the engine power and the difference between the two is greater than the threshold, the preset current transmitted to the main pump remains unchanged.

[0055] The second judgment module, if the current output power of the main pump is less than the engine power and the difference between the two is not greater than the threshold, will transmit a new preset current to the main pump; wherein, the new preset current is adapted to the new input crushing level, the new input crushing level is less than the original input crushing level, the crushing level is input through the display screen, and the alarm signal is displayed through the display screen.

[0056] The second judgment module is specifically configured to: if the current output power of the main pump is less than the engine power and the difference between the two is not greater than the threshold, output an alarm signal for high crushing power; in response to receiving a new input crushing level, obtain a new preset current that matches the new input crushing level, and transmit the new preset current to the main pump.

[0057] This system was reprinted from Figure 2 The controller adopts a current-to-crushing-level correlation control approach, which links the main pump current to the crushing level. It is no longer limited by constant power, but only sets a maximum power (i.e., the current power of the engine) for monitoring. When the nitrogen pressure rises with the impact work, if the current output power of the main pump is less than the current power of the engine and the difference between the two is greater than the threshold, the main pump current will not be adjusted to ensure that the output flow is basically stable, thereby ensuring the constant crushing frequency.

[0058] Based on the same technical solution, the present invention also discloses a computer-readable storage medium that stores one or more programs, the one or more programs including instructions that, when executed by a computing device, cause the computing device to perform an excavator breaker flow control method.

[0059] Based on the same technical solution, the present invention also discloses a computer device, including one or more processors and one or more memories, wherein one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for performing a flow control method for an excavator breaker hammer.

[0060] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0061] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0062] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0063] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0064] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A method for controlling the flow rate of an excavator breaker hammer, characterized in that, include: In response to the detection of a crushing operation requirement, a preset current adapted to the input crushing level is obtained and transmitted to the main pump; In response to the detection of an increase in main pump pressure, the current output power of the main pump is calculated based on the current pressure of the main pump and the preset current. If the current output power of the main pump is less than the current power of the engine, and the difference between the two is greater than the threshold, the preset current transmitted to the main pump remains unchanged. If the current output power of the main pump is less than the current power of the engine, and the difference between the two is not greater than the threshold, a new preset current is transmitted to the main pump; wherein, the new preset current is adapted to the new input crushing level, and the new input crushing level is less than the original input crushing level.

2. The method for controlling the flow rate of an excavator breaker hammer according to claim 1, characterized in that, It also includes a step to detect whether there is a need for crushing operations, which includes: Collect the foot valve pilot signal and detect whether there is a need for crushing operation based on the foot valve pilot signal.

3. The method for controlling the flow rate of an excavator breaker hammer according to claim 1, characterized in that, If the current output power of the main pump is less than the current output power of the engine, and the difference between the two is not greater than a threshold, a new preset current is transmitted to the main pump, including: If the current output power of the main pump is less than the current power of the engine, and the difference between the two is not greater than the threshold, an alarm signal for high crushing power will be output. In response to receiving a new input crushing level, a new preset current adapted to the new input crushing level is obtained and transmitted to the main pump.

4. The method for controlling the flow rate of an excavator breaker hammer according to claim 3, characterized in that, The crushing level is input via the display screen, and alarm signals are displayed via the display screen.

5. A flow control system for an excavator breaker hammer, characterized in that, include: The current adaptation module, in response to the detection of a crushing operation requirement, acquires a preset current that matches the input crushing level and transmits the preset current to the main pump; The power calculation module, in response to the detection of an increase in main pump pressure, calculates the current output power of the main pump based on the current main pump pressure and the preset current; The first judgment module determines that if the current output power of the main pump is less than the current power of the engine and the difference between the two is greater than the threshold, the preset current transmitted to the main pump remains unchanged. The second judgment module, if the current output power of the main pump is less than the current power of the engine and the difference between the two is not greater than the threshold, will transmit a new preset current to the main pump; wherein, the new preset current is adapted to the new input crushing level, and the new input crushing level is less than the original input crushing level.

6. The excavator breaker flow control system according to claim 5, characterized in that, It also includes a detection module, which is configured as follows: Collect the foot valve pilot signal and detect whether there is a need for crushing operation based on the foot valve pilot signal.

7. The excavator breaker flow control system according to claim 5, characterized in that, The second judgment module is configured as follows: If the current output power of the main pump is less than the current power of the engine, and the difference between the two is not greater than the threshold, an alarm signal for high crushing power will be output. In response to receiving a new input crushing level, a new preset current adapted to the new input crushing level is obtained and transmitted to the main pump.

8. The excavator breaker flow control system according to claim 7, characterized in that, The crushing level is input via the display screen, and alarm signals are displayed via the display screen.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores one or more programs, the one or more programs including instructions that, when executed by a computing device, cause the computing device to perform any of the methods of claims 1 to 4.

10. A computer device, characterized in that, include: One or more processors and one or more memories, one or more programs stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods of claims 1 to 4.

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