CN114857112A - Boom amplitude-variation synchronous movement hydraulic system, operation machine and control method - Google Patents

Boom amplitude-variation synchronous movement hydraulic system, operation machine and control method Download PDF

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Publication number
CN114857112A
CN114857112A CN202210594916.9A CN202210594916A CN114857112A CN 114857112 A CN114857112 A CN 114857112A CN 202210594916 A CN202210594916 A CN 202210594916A CN 114857112 A CN114857112 A CN 114857112A
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China
Prior art keywords
amplitude
variable
oil cylinder
oil
valve
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CN202210594916.9A
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Chinese (zh)
Inventor
米克强
李为
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Sany High Altitude Machinery Equipment Co ltd
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Sany High Altitude Machinery Equipment Co ltd
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Priority to CN202210594916.9A priority Critical patent/CN114857112A/en
Publication of CN114857112A publication Critical patent/CN114857112A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/085—Servomotor systems incorporating electrically operated control means using a data bus, e.g. "CANBUS"

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention relates to the field of hydraulic systems, and provides a boom amplitude-variation synchronous motion hydraulic system, an operation machine and a control method, wherein the hydraulic system comprises: the first amplitude-variable oil cylinder and the second amplitude-variable oil cylinder are communicated, and a rod cavity of the first amplitude-variable oil cylinder is communicated with a rodless cavity of the second amplitude-variable oil cylinder; hydraulic oil channels are arranged on the pistons of the first variable amplitude oil cylinder and the second variable amplitude oil cylinder, and the rod cavities and the rodless cavities at the two ends of the piston are communicated through the hydraulic oil channels; and a control valve for controlling the on-off of the hydraulic oil channel is arranged on the hydraulic oil channel, and the control valve is opened when the piston moves to the end part of the rod cavity. The boom variable amplitude synchronous motion hydraulic system, the operation machine and the control method provided by the invention can realize automatic exhaust of double oil cylinders and automatically eliminate accumulated errors.

Description

Boom amplitude-variation synchronous movement hydraulic system, operation machine and control method
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to a boom amplitude-variable synchronous motion hydraulic system, an operation machine and a control method.
Background
The crank arm type overhead working truck is lifting equipment for overhead working, can work while walking when a platform for overhead working is lifted to any position by crossing obstacles, and is widely suitable for installation, maintenance and climbing operation in industries such as municipal administration, electric power, street lamps, advertisements, communication, photography, gardens, traffic, wharfs, airport ports, large-scale industrial and mining enterprises and the like.
The existing crank arm type aerial work platform is provided with an upper folding arm and a lower folding arm, the movement of an arm support is controlled through the synchronous movement of the upper folding arm and the lower folding arm, the control scheme of the arm support is generally a scheme that a group of reversing valves and oil cylinders are connected in series, an auxiliary synchronous valve comprises an overflow valve and a throttle valve which are connected in parallel, however, when the oil cylinders are asynchronous, a manual oil supplementing mode is needed, the requirement on operators is high, and the oil cylinders are difficult to exhaust.
Disclosure of Invention
The invention provides a boom variable amplitude synchronous motion hydraulic system, an operation machine and a control method, which are used for solving the defects that in the prior art, oil cylinders are difficult to exhaust and accumulated errors are difficult to eliminate, realizing automatic exhaust of double oil cylinders and automatically eliminating the accumulated errors.
The invention provides a boom amplitude-variable synchronous motion hydraulic system, which comprises:
the first amplitude-varying oil cylinder and the second amplitude-varying oil cylinder are communicated, and a rod cavity of the first amplitude-varying oil cylinder is communicated with a rodless cavity of the second amplitude-varying oil cylinder;
hydraulic oil channels are arranged on the pistons of the first variable amplitude oil cylinder and the second variable amplitude oil cylinder, and the hydraulic oil channels are used for communicating rod cavities and rodless cavities at two ends of the piston;
and a control valve for controlling the on-off of the hydraulic oil channel is arranged on the hydraulic oil channel, and the control valve is opened when the piston moves to the end part of the rod cavity.
According to the boom variable amplitude synchronous motion hydraulic system provided by the invention, when the piston displaces to the end part of the rodless cavity, the control valve is opened.
According to the boom variable amplitude synchronous movement hydraulic system provided by the invention, the control valve is a mechanical control one-way valve.
According to the boom variable amplitude synchronous motion hydraulic system provided by the invention, the control valve is an electronic control one-way valve.
The boom amplitude synchronous movement hydraulic system further comprises a reversing valve, wherein the reversing valve is provided with a first working port and a second working port, the first working port is communicated with a first balance valve through a lifting oil pipe, and the first balance valve is communicated with a rodless cavity of a first amplitude oil cylinder; the second working port is communicated with a second balance valve through a descending oil pipe, and the second balance valve is communicated with the rod cavity of the first luffing oil cylinder.
According to the boom variable-amplitude synchronous motion hydraulic system provided by the invention, the rod cavity of the first variable-amplitude oil cylinder is communicated with the rodless cavity of the second variable-amplitude oil cylinder through the third balance valve and the fourth balance valve.
According to the boom variable amplitude synchronous motion hydraulic system provided by the invention,
the mechanical control one-way valve comprises two oppositely arranged one-way valves;
when the piston is displaced to the end of the rod cavity, the mechanical control one-way valve is opened, and only hydraulic oil is allowed to flow from the rodless cavity to the rod cavity; when the piston is displaced to the end of the rodless chamber, the mechanically controlled check valve opens, allowing only hydraulic oil to flow from the rod chamber to the rodless chamber.
The present invention also provides a work machine comprising: the boom variable amplitude synchronous motion hydraulic system is characterized by comprising a boom variable amplitude synchronous motion hydraulic system.
The invention also provides a control method for the amplitude-variable synchronous motion of the arm support, which adopts the hydraulic system for the amplitude-variable synchronous motion of the arm support and comprises the following steps:
a rodless cavity of the first variable amplitude oil cylinder is communicated with hydraulic oil;
when the piston of the first amplitude-variable oil cylinder moves to the end part of the rod cavity, the control valve of the first amplitude-variable oil cylinder is opened;
the hydraulic oil continuously enters the rodless cavity of the second variable amplitude oil cylinder until the piston of the second variable amplitude oil cylinder moves to the end part of the rod cavity, and the control valve of the second variable amplitude oil cylinder is also opened;
and hydraulic oil returns through the rod cavity of the second amplitude-variable oil cylinder, so that asynchronous errors of the first amplitude-variable oil cylinder and the second amplitude-variable oil cylinder are eliminated, and internal air is discharged.
The invention also provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor, wherein the processor executes the program to realize the steps of any one of the control methods for the amplitude-variable synchronous motion of the arm support.
The invention also provides a non-transitory computer readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the control method for variable-amplitude synchronous motion of the boom as described in any one of the above.
According to the boom frame amplitude synchronous movement hydraulic system and the control method, the control valve is arranged, when the piston is displaced to the end part of the rod cavity, the control valve is opened, hydraulic oil discharges air in the first amplitude cylinder through the control valve, oil is continuously fed into the rodless cavity of the second amplitude cylinder until the piston of the second amplitude cylinder is displaced to the end part of the rod cavity, the control valve of the second amplitude cylinder is also opened, the hydraulic oil in the rod cavity of the second amplitude cylinder returns, and asynchronous errors of the first amplitude cylinder and the second amplitude cylinder are eliminated and the air in the first amplitude cylinder and the second amplitude cylinder is discharged; therefore, the exhaust during the rising is realized, the error elimination can be realized without human participation, and no accumulated error exists.
The working machine provided by the invention has various advantages as described above because the working machine comprises the boom variable amplitude synchronous motion hydraulic system as described above.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a boom variable amplitude synchronous motion hydraulic system provided by the invention;
FIG. 2 is a schematic diagram of a first mechanically controlled check valve closed state provided by the present invention;
FIG. 3 is a schematic diagram of a first mechanically controlled check valve open state provided by the present invention;
FIG. 4 is a schematic structural diagram of an electronic device provided by the present invention;
reference numerals:
1. a diverter valve; 2. a first amplitude variation oil cylinder; 3. a second variable amplitude oil cylinder; 4. a first piston; 5. a first rod chamber; 6. a first rodless cavity; 7. a first mechanically controlled check valve; 8. a second piston; 9. a second rod chamber; 10. a second rodless cavity; 11. a second mechanically controlled check valve; 12. a first counter-balance valve; 13. a second balancing valve; 14. lifting the oil pipe; 15. descending the oil pipe; 16. a third counter-balance valve; 17. a fourth balancing valve;
410. a processor; 420. a communication interface; 430. a memory; 440. a communication bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The boom variable amplitude synchronous movement hydraulic system of the invention is described below with reference to fig. 1 to 3.
The boom variable amplitude synchronous motion hydraulic system comprises a first variable amplitude oil cylinder 2 and a second variable amplitude oil cylinder 3, wherein a rod cavity of the first variable amplitude oil cylinder 2 is communicated with a rodless cavity of the second variable amplitude oil cylinder 3; hydraulic oil channels are arranged on the pistons of the first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3, and the rod cavities and the rodless cavities at the two ends of the piston are communicated through the hydraulic oil channels; and a control valve for controlling the on-off of the hydraulic oil channel is arranged on the hydraulic oil channel, and the control valve is opened when the piston moves to the end part of the rod cavity.
For convenience of description, the piston of the first luffing cylinder 2 is hereinafter referred to collectively as the first piston 4, the rod chamber of the first luffing cylinder 2 is referred to collectively as the first rod chamber 5, and the rodless chamber of the first luffing cylinder 2 is referred to collectively as the first rodless chamber 6. The pistons of the second luffing cylinder 3 are collectively referred to as a second piston 8, the rod chambers of the second luffing cylinder 3 are collectively referred to as a second rod chamber 9, and the rodless chamber of the second luffing cylinder 3 is referred to as a second rodless chamber 10.
According to the boom frame amplitude-variable synchronous movement hydraulic system provided by the invention, by arranging the control valve, when the piston is displaced to the end part of the rod cavity, the control valve is opened, hydraulic oil continues to enter the rodless cavity of the second amplitude-variable oil cylinder 3 through the control valve until the piston of the second amplitude-variable oil cylinder 3 is displaced to the end part of the rod cavity, the one-way valve of the second amplitude-variable oil cylinder 3 is also opened, and the hydraulic oil is delivered to the second working port through the control valve, so that asynchronous errors of the first amplitude-variable oil cylinder 2 and the second amplitude-variable oil cylinder 3 are eliminated, and the internal air is discharged; therefore, the exhaust during the rising is realized, the error elimination can be realized without human participation, and no accumulated error exists.
When the piston is displaced to the end of the rod chamber, namely when the piston is fully extended, namely the first luffing cylinder 2 and the second luffing cylinder 3 move to the maximum stroke, the control valve is opened, and only hydraulic oil is allowed to flow from the rodless chamber to the rod chamber.
In the embodiment of the present invention, when the piston is displaced to the end of the rodless chamber, which means when the piston is fully retracted, that is, when the first luffing cylinder 2 and the second luffing cylinder 3 move to the minimum stroke, the control valve is also opened, allowing only hydraulic oil to flow from the rodless chamber to the rodless chamber.
Furthermore, the control valve can be a mechanical control one-way valve and also can be an electronic control one-way valve.
In an embodiment of the present invention, when the control valve is a mechanical control check valve, as shown in fig. 1, the boom variable amplitude synchronous motion hydraulic system provided by the present invention further includes a reversing valve 1, where the reversing valve 1 has a first working port and a second working port; a first piston 4 is arranged in the first luffing cylinder 2; the first piston 4 divides the first luffing cylinder 2 into a first rod chamber 5 and a first rodless chamber 6; the first piston 4 is provided with a first mechanical control one-way valve 7; when the first luffing cylinder 2 is fully extended or retracted, the first mechanical control one-way valve 7 is opened and the flow direction is opposite; a second piston 8 is arranged in the second variable amplitude oil cylinder 3, and the second piston 8 divides the second variable amplitude oil cylinder 3 into a second rod-containing cavity 9 and a second rodless cavity 10; a second mechanical control one-way valve 11 is arranged on the second piston 8; when the second luffing cylinder 3 is fully extended or fully retracted, the second mechanical control one-way valve 11 is opened and the flow direction is opposite; the first working port is communicated with the first rodless cavity 6 through a first balance valve 12, and the second working port is communicated with the second rod cavity 9 through a descending oil pipe 15 and a second balance valve 13; the first rod chamber 5 communicates with the second rodless chamber 10.
The boom variable amplitude synchronous motion hydraulic system can realize synchronous ascending and synchronous descending of the first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3, and can realize automatic exhaust of the first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3 and automatically eliminate accumulated errors.
The specific working process is as follows: when the hydraulic oil rises synchronously, the reversing valve 1 is operated, so that the hydraulic oil enters the first rodless cavity 6 through the first working port to push the first piston 4 to extend outwards, and the hydraulic oil discharged from the first rod cavity 5 reaches the second rodless cavity 10 to push the second piston 8 to extend outwards; the second rod cavity 9 returns oil through a second working port; thereby completing the simultaneous lifting of the first luffing cylinder 2 and the second luffing cylinder 3.
Exhausting and error elimination: when the first luffing cylinder 2 moves to the maximum stroke, the first mechanical control one-way valve 7 is opened, hydraulic oil continuously flows into the second rodless cavity 10 through the first mechanical control one-way valve 7 until the second luffing cylinder 3 moves to the maximum stroke, the second mechanical control one-way valve 11 is also opened, and the hydraulic oil flows to the second working port through the first mechanical control one-way valve 7 and the second mechanical control one-way valve 11, so that asynchronous errors of the first luffing cylinder 2 and the second luffing cylinder 3 are eliminated, and internal air is discharged.
Synchronous descending: when the reversing valve 1 is operated, oil enters the second working port, hydraulic oil enters the second rod-containing cavity 9 to push the second piston 8 to retract, and hydraulic oil in the second rodless cavity 10 reaches the first rod-containing cavity 5 to push the first piston 4 to retract, so that the first amplitude-changing oil cylinder 2 and the second amplitude-changing oil cylinder 3 synchronously descend.
The reversing valve 1 is a three-position four-way electromagnetic valve, as shown in fig. 1, when the working position is the right position, the first working port is an oil inlet, and the second working port is an oil return port; when the work position is the left position, first work port is the oil return opening, and the second work port is the oil inlet, and when the work position was the meso position, first work port and second work port all had no pressure, can realize the shutting of first width of cloth hydro-cylinder 2 and the second width of cloth hydro-cylinder 3, promptly, first width of cloth hydro-cylinder 2 and the second width of cloth hydro-cylinder 3 can remain motionless when the pipeline breaks down, have improved the security.
Furthermore, the first working port is communicated with the first balance valve 12 through the lifting oil pipe 14, when the first luffing cylinder 2 is lifted, the reversing valve 1 works at the right position, the lifting oil pipe 14 is filled with oil, and hydraulic oil enters the first rodless cavity 6 through the first balance valve 12. The second working port is communicated with a second balance valve 13 through a descending oil pipe 15, and hydraulic oil in the second rod cavity 9 returns through the second balance valve 13 and the descending oil pipe 15.
The second balance valve 13 is communicated with the lifting oil pipe 14, when the lifting oil pipe 14 is filled with oil, the second balance valve 13 is opened, and hydraulic oil in the second rod cavity 9 can flow to the second working port through the second balance valve 13, so that oil return is realized.
And a third balance valve 16 and a fourth balance valve 17, wherein the first rod chamber 5 and the second rodless chamber 10 are communicated through the third balance valve 16 and the fourth balance valve 17. One end of the third balanced valve 16 is communicated with the first rod chamber 5, the other end is communicated with the fourth balanced valve 17, and the other end of the fourth balanced valve 17 is communicated with the second rodless chamber 10. The third balancing valve 16 and the first balancing valve 12 form a first balancing valve group which communicates with the first luffing cylinder 2, and the fourth balancing valve 17 and the second balancing valve 13 form a second balancing valve group which communicates with the second luffing cylinder 3. The first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3 are connected in parallel, and the first balance valve group and the second balance valve group are connected through three pipelines to realize parallel connection.
When the reversing valve 1 is in a neutral position, the lifting oil pipe 14 and the descending oil pipe 15 have no pressure, and the locking of the first luffing oil cylinder 2 and the second luffing oil cylinder 3 can be realized.
Specifically, the pilot port of the third balance valve 16 communicates with the lift oil pipe 14, and when the lift oil pipe 14 is filled with oil, the third balance valve 16 is opened. The first rod cavity 5 and the second rod cavity 9 are connected in parallel with pilot oil of the balance valve, the first rodless cavity 6 and the second rodless cavity 10 are connected in parallel with pilot oil of the balance valve, when the balance valve stops moving, the pilot pressure of the balance valve can be quickly relieved, and the position precision is high.
As shown in fig. 2 and 3, each of the first mechanically controlled check valve 7 and the second mechanically controlled check valve 11 includes two oppositely disposed check valves.
As shown in fig. 2, when the first piston 4 is in the intermediate position of the first luffing cylinder 2, the first mechanically controlled check valve 7 is closed and the first rodless chamber 6 and the first rodless chamber 5 are completely separated; as shown in fig. 3, when the first luffing cylinder 2 is fully extended, the first piston 4 abuts against the cylinder bottom, and due to the pressure of the cylinder bottom on the check valve, the first mechanically controlled check valve 7 opens, allowing only hydraulic oil to flow from the first rodless chamber 6 to the first rodless chamber 5; and when the first luffing cylinder 2 is fully retracted, the check valve on the other side of the first mechanically controlled check valve 7 is opened, and only hydraulic oil is allowed to flow from the first rod chamber 5 to the first rodless chamber 6.
Similarly, when the second luffing cylinder 3 is fully extended, the second mechanical control one-way valve 11 is opened, and only the second rodless chamber 10 is allowed to flow to the second rod-containing chamber 9; when the second luffing cylinder 3 is fully retracted, the second mechanically controlled non-return valve 11 opens, allowing only the second rod-containing chamber 9 to flow to the second rodless chamber 10.
In another aspect, an embodiment of the present invention further provides a working machine including the boom variable amplitude synchronous motion hydraulic system as described above, which has various advantages as described above.
In another aspect, an embodiment of the present invention further provides a method for controlling the amplitude-variable synchronous motion of the boom, where the boom amplitude-variable synchronous motion hydraulic system described above is adopted, and the method includes the following steps:
hydraulic oil is introduced into a rodless cavity of the first variable amplitude oil cylinder 2;
when the piston of the first amplitude-variable oil cylinder 2 moves to the end part of the rod cavity, the control valve of the first amplitude-variable oil cylinder 2 is controlled to be opened;
the hydraulic oil continuously enters the rodless cavity of the second variable amplitude oil cylinder 3 until the piston of the second variable amplitude oil cylinder 3 moves to the end part of the rod cavity, and the control valve of the second variable amplitude oil cylinder 3 is also opened;
the hydraulic oil returns through the rod cavity of the second variable amplitude oil cylinder 3, so that the asynchronous error of the first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3 is eliminated, and the internal air is discharged.
According to the control method for the amplitude-variable synchronous motion of the arm support, provided by the invention, the first amplitude-variable oil cylinder 2 and the second amplitude-variable oil cylinder 3 can automatically exhaust gas, so that accumulated errors are automatically eliminated.
Fig. 4 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 4: a processor (processor)410, a communication Interface 420, a memory (memory)430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute a method for controlling boom luffing synchronous motion, where the method includes:
the rodless cavity of the first variable amplitude oil cylinder 2 is communicated with hydraulic oil;
when the piston of the first luffing cylinder 2 moves to the end part of the rod cavity, the control valve of the first luffing cylinder 2 is opened;
the hydraulic oil continuously enters the rodless cavity of the second variable amplitude oil cylinder 3 until the piston of the second variable amplitude oil cylinder 3 moves to the end part of the rod cavity, and the control valve of the second variable amplitude oil cylinder 3 is also opened;
the hydraulic oil returns through the rod cavity of the second variable amplitude oil cylinder 3, so that the asynchronous error of the first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3 is eliminated, and the internal air is discharged.
In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention further provides a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, where the computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the method for controlling the boom luffing synchronous motion provided by the above methods, where the method includes:
the rodless cavity of the first variable amplitude oil cylinder 2 is communicated with hydraulic oil;
when the piston of the first luffing cylinder 2 moves to the end part of the rod cavity, the control valve of the first luffing cylinder 2 is opened;
the hydraulic oil continuously enters the rodless cavity of the second variable amplitude oil cylinder 3 until the piston of the second variable amplitude oil cylinder 3 moves to the end part of the rod cavity, and the control valve of the second variable amplitude oil cylinder 3 is also opened;
the hydraulic oil returns through the rod cavity of the second variable amplitude oil cylinder 3, so that the asynchronous error of the first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3 is eliminated, and the internal air is discharged.
In another aspect, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented by a processor to execute the above-mentioned methods for controlling the boom variable-amplitude synchronous motion, where the method includes:
the rodless cavity of the first variable amplitude oil cylinder 2 is communicated with hydraulic oil;
when the piston of the first luffing cylinder 2 moves to the end part of the rod cavity, the control valve of the first luffing cylinder 2 is opened;
the hydraulic oil continuously enters the rodless cavity of the second variable amplitude oil cylinder 3 until the piston of the second variable amplitude oil cylinder 3 moves to the end part of the rod cavity, and the control valve of the second variable amplitude oil cylinder 3 is also opened;
the hydraulic oil returns through the rod cavity of the second variable amplitude oil cylinder 3, so that the asynchronous error of the first variable amplitude oil cylinder 2 and the second variable amplitude oil cylinder 3 is eliminated, and the internal air is discharged.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A boom amplitude-variation synchronous motion hydraulic system is characterized by comprising:
the first amplitude-varying oil cylinder and the second amplitude-varying oil cylinder are communicated, and a rod cavity of the first amplitude-varying oil cylinder is communicated with a rodless cavity of the second amplitude-varying oil cylinder;
hydraulic oil channels are arranged on the pistons of the first variable amplitude oil cylinder and the second variable amplitude oil cylinder, and the hydraulic oil channels are used for communicating rod cavities and rodless cavities at two ends of the piston;
and a control valve for controlling the on-off of the hydraulic oil channel is arranged on the hydraulic oil channel, and the control valve is opened when the piston moves to the end part of the rod cavity.
2. The boom variable amplitude synchronous motion hydraulic system as claimed in claim 1, wherein the control valve is opened when the piston is displaced to the end of the rodless chamber.
3. The boom variable amplitude synchronous motion hydraulic system as claimed in claim 1 or 2, wherein the control valve is a mechanically controlled check valve.
4. The boom variable amplitude synchronous motion hydraulic system as claimed in claim 1 or 2, wherein the control valve is an electronically controlled check valve.
5. The boom variable amplitude synchronous motion hydraulic system as claimed in claim 1, further comprising a reversing valve, wherein the reversing valve is provided with a first working port and a second working port, the first working port is communicated with a first balance valve through a lifting oil pipe, and the first balance valve is communicated with the rodless cavity of the first variable amplitude oil cylinder; the second working port is communicated with a second balance valve through a descending oil pipe, and the second balance valve is communicated with the rod cavity of the first luffing oil cylinder.
6. The boom variable amplitude synchronous motion hydraulic system as claimed in claim 1, wherein the rod chamber of the first variable amplitude cylinder and the rodless chamber of the second variable amplitude cylinder are communicated through a third balance valve and a fourth balance valve.
7. The boom variable amplitude synchronous motion hydraulic system as claimed in claim 3, wherein the mechanical control check valve comprises two oppositely arranged check valves;
when the piston is displaced to the end of the rod cavity, the mechanical control one-way valve is opened, and only hydraulic oil is allowed to flow from the rodless cavity to the rod cavity; when the piston is displaced to the end of the rodless chamber, the mechanically controlled check valve opens, allowing only hydraulic oil to flow from the rod chamber to the rodless chamber.
8. A working machine, characterized by comprising a boom amplitude synchronous motion hydraulic system as claimed in any one of claims 1-7.
9. A control method for the amplitude-variable synchronous motion of a boom adopts the amplitude-variable synchronous motion hydraulic system of the boom as claimed in any one of claims 1 to 7, and is characterized by comprising the following steps:
a rodless cavity of the first variable amplitude oil cylinder is communicated with hydraulic oil;
when the piston of the first amplitude-variable oil cylinder moves to the end part of the rod cavity, the control valve of the first amplitude-variable oil cylinder is opened;
the hydraulic oil continuously enters the rodless cavity of the second variable amplitude oil cylinder until the piston of the second variable amplitude oil cylinder moves to the end part of the rod cavity, and the control valve of the second variable amplitude oil cylinder is also opened;
and hydraulic oil returns through the rod cavity of the second amplitude-variable oil cylinder, so that asynchronous errors of the first amplitude-variable oil cylinder and the second amplitude-variable oil cylinder are eliminated, and internal air is discharged.
10. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for controlling boom luffing synchronous motion according to claim 9 when executing the program.
CN202210594916.9A 2022-05-27 2022-05-27 Boom amplitude-variation synchronous movement hydraulic system, operation machine and control method Pending CN114857112A (en)

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CN202210594916.9A CN114857112A (en) 2022-05-27 2022-05-27 Boom amplitude-variation synchronous movement hydraulic system, operation machine and control method

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CN114857112A true CN114857112A (en) 2022-08-05

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