CN114809163A - Hydraulic control method and device for breaking hammer and working machine - Google Patents
Hydraulic control method and device for breaking hammer and working machine Download PDFInfo
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- CN114809163A CN114809163A CN202210594017.9A CN202210594017A CN114809163A CN 114809163 A CN114809163 A CN 114809163A CN 202210594017 A CN202210594017 A CN 202210594017A CN 114809163 A CN114809163 A CN 114809163A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000006073 displacement reaction Methods 0.000 claims abstract description 64
- 239000003921 oil Substances 0.000 claims description 32
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
- E02F5/305—Arrangements for breaking-up hard ground
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
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Abstract
The invention relates to the technical field of striking crushing, and provides a hydraulic control method and device for a crushing hammer and an operating machine, wherein the hydraulic control method for the crushing hammer comprises the following steps: acquiring a hydraulic flow demand value during the operation of the breaking hammer; setting a first working state and a second working state of both the front pump and the rear pump, wherein the first working state is the minimum displacement, and the second working state is the normal output flow; the sum of the minimum displacement and the normal output flow is equal to the hydraulic flow demand value; setting one of the front pump and the rear pump as a first working state and the other as a second working state; setting the switching time of the working states of the front pump and the rear pump; and switching the working states of the front pump and the rear pump according to the switching time. According to the hydraulic control method and device for the breaking hammer and the operation machine, the front pump and the rear pump are abraded to the same degree, the problem that the front pump or the rear pump is abraded excessively independently is solved, and meanwhile the working efficiency of the front pump and the working efficiency of the rear pump are improved.
Description
Technical Field
The invention relates to the technical field of striking crushing, in particular to a hydraulic control method and device of a crushing hammer and an operation machine.
Background
The hydraulic breaking hammer is a device which takes hydraulic energy as a power source and converts the hydraulic energy into mechanical striking kinetic energy in the movement process, so that a piston pushes a drill rod to carry out breaking operation, and the hydraulic breaking hammer is widely applied to capital construction and mining.
In the prior art, the flow demand of the breaking hammer is equivalent to the flow demand of the right walking, and the excavator cannot walk in the breaking process of the breaking hammer. The breaking hammer control pilot pressure signal is a common pilot pressure signal which is output to the controller through a right walking pilot and a breaking hammer pilot through a shuttle valve, the controller controls the rear pump again, and the breaking hammer control of the excavator only adopts the rear pump at present, so that when the excavator is used for the working condition of the breaking hammer for a long time, the rear pump can consume abrasion all the time.
In the market, in order to make the front pump and the rear pump have the same wear, double-pump confluence is adopted, and the flow output of the pumps is half of the maximum displacement of the pumps, but the efficiency of the pumps is not high by adopting the mode.
Disclosure of Invention
The invention provides a hydraulic control method and device for a breaking hammer and an operating machine, which are used for overcoming the defects that a rear pump is worn quickly and the pump efficiency is low in the prior art, preventing the rear pump from being worn and improving the main pump efficiency.
The invention provides a breaking hammer control method, which comprises the following steps:
acquiring a hydraulic flow demand value during the operation of the breaking hammer;
setting a first working state and a second working state of both the front pump and the rear pump, wherein the first working state is the minimum displacement, and the second working state is the normal output flow; the sum of the minimum displacement and the normal output flow is equal to the hydraulic flow demand value;
setting one of the front pump and the rear pump as a first working state and the other as a second working state;
setting the switching time of the working states of the front pump and the rear pump;
and switching the working states of the front pump and the rear pump according to the switching time.
According to the hydraulic control method for the breaking hammer, provided by the invention, in the step of acquiring the hydraulic flow demand value during the operation of the breaking hammer, the pressure during the operation of the breaking hammer is acquired through the breaking hammer control pilot valve and the pressure sensor, so that the hydraulic flow demand value is acquired.
According to the hydraulic control method of the breaking hammer, provided by the invention, in the step of setting the switching time of the working states of the front pump and the rear pump, the switching time is set through the controller.
According to the hydraulic control method for the breaking hammer, provided by the invention, in the step of switching the working states of the front pump and the rear pump according to the switching time, the front pump and the rear pump are respectively controlled by the controller to be switched between the first working state and the second working state.
According to the hydraulic control method of the breaking hammer, provided by the invention, in the step of switching the working states of the front pump and the rear pump according to the switching time, the displacement of the front pump and the displacement of the rear pump are controlled by respectively controlling a front pump displacement control electromagnetic proportional valve and a rear pump displacement electromagnetic proportional valve through a controller.
The present invention also provides a hydraulic control device for a breaking hammer, comprising:
the hydraulic oil tank is used for providing hydraulic oil;
oil inlets of the front pump and the rear pump are communicated with the hydraulic oil tank, and oil outlets of the front pump and the rear pump are respectively connected with a first oil supply pipeline and a second oil supply pipeline;
the oil inlet of the main control valve is respectively communicated with the first oil supply pipeline and the second oil supply pipeline, and the oil outlet of the main control valve is connected with the breaking hammer;
the crushing pilot control valve is connected with the main control valve;
a pressure detection part connected in series to a pilot circuit of the crushing pilot control valve;
and the controller is used for receiving the pressure signal of the pressure detection part and controlling the opening of the main control valve and the crushing pilot control valve and the displacement proportion of the front pump and the rear pump.
According to the hydraulic control device for the breaking hammer, provided by the invention, the first oil supply pipeline is provided with the first displacement proportional control valve, the second oil supply pipeline is provided with the second displacement proportional control valve, and the control end of the first displacement proportional control valve and the control end of the second displacement proportional control valve are both connected with the controller.
According to the hydraulic control device of the breaking hammer, a first hydraulic control servo valve is further arranged between the first displacement proportional control valve and the front pump; and a second hydraulic control servo valve is also arranged between the second displacement proportional control valve and the rear pump.
The present invention also provides a work machine comprising: the hydraulic control device of the breaking hammer is adopted.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of the hydraulic control method of the breaking hammer.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method of hydraulic control of a demolition hammer as defined in any one of the above.
The invention also provides a computer program product comprising a computer program which, when executed by a processor, carries out the steps of the hydraulic control method of a breaking hammer as defined in any one of the above.
The present invention also provides a work machine comprising: the hydraulic control method of the breaking hammer is adopted to control the breaking hammer to carry out breaking operation.
According to the hydraulic control method for the breaking hammer, provided by the invention, by acquiring the hydraulic flow demand value during the operation of the breaking hammer, one of the front pump and the rear pump is in a first working state, the other pump is in a second working state, and the flow output of the first working state and the flow output of the second working state are equal to the hydraulic flow demand value; switching the working states of the front pump and the rear pump according to the switching time; by adopting the control method, the front pump and the rear pump generate the same abrasion, the problem of independent excessive abrasion of the front pump or the rear pump is solved, and meanwhile, the working efficiency of the front pump and the working efficiency of the rear pump are improved.
According to the hydraulic control device for the breaking hammer, provided by the invention, the pressure is measured through the main control valve and the pressure detection part, the hydraulic demand flow is obtained, the controller receives a pressure signal and controls the displacement proportion of the front pump and the rear pump, the working states of the front pump and the rear pump are switched, and the front pump or the rear pump is prevented from being independently worn, so that the front pump or the rear pump is worn to the same degree; and the efficiency of the front pump and the rear pump is improved.
The present invention provides a working machine having the hydraulic control device for a breaking hammer as described above, and therefore having various advantages 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 flow diagram of a hydraulic control method for a demolition hammer according to the present disclosure;
FIG. 2 is a hydraulic schematic diagram of a hydraulic control apparatus for a demolition hammer according to the present disclosure;
FIG. 3 is a schematic structural diagram of an electronic device provided by the present invention;
reference numerals:
1: a hydraulic oil tank; 2: a front pump; 3: a rear pump; 4: a breaking hammer; 5: a main control valve; 6: a crushing pilot control valve; 7: a pressure detecting member; 8: a controller; 9: a first displacement proportional control valve; 10: a second displacement proportional control valve; 11: a first hydraulic control servo valve; 12: a second hydraulic servo valve; 13: an engine;
310: a processor; 320: a communication interface; 330: a memory; 340: a communication bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, 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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Example one
Fig. 1 is a schematic flow chart of a hydraulic control method for a breaking hammer according to a first embodiment, and as shown in fig. 1, the hydraulic control method for the breaking hammer according to the first embodiment includes the following steps:
101. and acquiring a hydraulic flow demand value during the operation of the breaking hammer.
In a specific implementation process, the hydraulic flow demand value during the operation of the breaking hammer is first obtained, and the obtaining manner may be self-obtaining by different sensors, or may be other obtaining manners. For example, the flow rate value may be obtained by a flowmeter, and the hydraulic flow rate value may be further estimated by measuring the pressure based on the principle that the flow rate is increased as the pressure is increased.
102. Setting a first working state and a second working state of both the front pump and the rear pump, wherein the first working state is the minimum displacement, and the second working state is the normal output flow; the sum of the minimum displacement and the normal output flow is equal to the hydraulic flow demand.
The purpose of setting like this is for the sum of the output flow of preceding pump and rear pump can satisfy the hydraulic pressure flow demand when the quartering hammer operation. The output flow of the front pump and the output flow of the rear pump can be adjusted, the front pump and the rear pump are set to be in a first working state and a second working state, the first working state is the minimum displacement, namely, the front pump and the rear pump are close to being closed but not closed, and the abrasion to the pump body can be ignored in the first working state. The second working state is that the flow under the first working state is subtracted according to the hydraulic flow demand, the flow is normally output according to the demand, and the pump body is normally abraded under the second working state.
103. One of the front pump and the rear pump is set to be in a first working state, and the other pump is set to be in a second working state.
Namely, when the front pump is in the first working state, the rear pump is in the second working state; when the front pump is in the second working state, the rear pump is in the first working state; the hydraulic flow supply during the crushing operation of the crushing hammer can be met, and the working efficiency of the front pump or the rear pump can be improved.
104. And setting the switching time of the working states of the front pump and the rear pump.
In a specific implementation process, the switching time of the working states of the front pump and the rear pump can be set according to needs, and the switching time can be 5 minutes, 10 minutes or other time.
105. And switching the working states of the front pump and the rear pump according to the switching time.
It is understood that, if the front pump is in the first operating state and the rear pump is in the second operating state in the initial state, when the operating state continues for the switching time, the operating states of the front pump and the rear pump are switched simultaneously, that is, the front pump is switched from the first operating state to the second operating state, and the rear pump is switched from the second operating state to the first operating state. In this process, the primary rear pump wear is switched to the primary front pump wear. And after the switching time of the operation, switching is performed, and the operation is circulated in such a way, so that the switching of the operation states of the front pump and the rear pump is realized.
Example two
Specifically, in step 101, the hydraulic flow demand value is obtained by acquiring the pressure during the operation of the breaking hammer through the breaking hammer control pilot valve and the pressure sensor.
The hydraulic flow demand value is obtained by the pressure when the pilot pressure is higher and the flow is higher. The manner in which the hydraulic flow demand is derived from pressure is not limited and can be derived in any available manner.
EXAMPLE III
Specifically in this embodiment, in step 104, the switching time is set in advance by the controller.
Example four
Specifically in this embodiment, in step 105, the front pump and the rear pump are respectively controlled by the controller to switch between the first operating state and the second operating state.
EXAMPLE five
Specifically in the present embodiment, in step 105, the displacement of the front pump and the displacement of the rear pump are controlled by the controller to control the front pump displacement control electromagnetic proportional valve and the rear pump displacement electromagnetic proportional valve respectively.
Therefore, according to the hydraulic control method for the breaking hammer, provided by the invention, by acquiring the hydraulic flow demand value during the operation of the breaking hammer, one of the front pump and the rear pump is in the first working state, the other pump is in the second working state, and the sum of the flow outputs in the first working state and the second working state is equal to the hydraulic flow demand value; switching the working states of the front pump and the rear pump according to the switching time; by adopting the control method, the front pump and the rear pump generate the same abrasion, the problem of independent excessive abrasion of the front pump or the rear pump is solved, and meanwhile, the working efficiency of the front pump and the working efficiency of the rear pump are improved.
Based on the same general inventive concept, the invention also provides a hydraulic control device of the breaking hammer, which is described below, and the hydraulic control device of the breaking hammer described below and the hydraulic control method of the breaking hammer described above can be referred to correspondingly.
EXAMPLE six
Fig. 2 is a hydraulic schematic diagram of a hydraulic control device of a breaking hammer according to a sixth embodiment, and as shown in fig. 2, the hydraulic control device of the breaking hammer according to the sixth embodiment includes: the hydraulic control system comprises a hydraulic oil tank 1, a front pump 2, a rear pump 3, a breaking hammer 4, a main control valve 5, a breaking pilot control valve 6, a pressure detection component 7 and a controller 8, wherein the hydraulic oil tank 1 is used for providing hydraulic oil; an oil inlet of the front pump 2 is communicated with the hydraulic oil tank 1, and an oil outlet is connected with a first oil supply pipeline; an oil inlet of the rear pump 3 is communicated with the hydraulic oil tank 1, and an oil outlet is connected with a second oil supply pipeline; an oil inlet of the main control valve 5 is simultaneously communicated with the first oil supply pipeline and the second oil supply pipeline, and an oil outlet is connected with the breaking hammer; the crushing pilot control valve 6 is connected with the main control valve 5; the pressure detection component 7 is connected in series with a pilot circuit of the crushing pilot control valve 6; the controller 8 is used for receiving the pressure signal of the pressure detection part 7 and controlling the opening of the main control valve 5 and the crushing pilot control valve 6 and the displacement proportion of the front pump 2 and the rear pump 3.
When the breaking hammer mode is pressed, the main valve confluence cutoff valve is switched on, the single-action double-pump confluence is opened at the moment, the flow demand of the breaking hammer is transmitted to the controller according to pilot pressure signals of the breaking pilot control valve 6 and the pressure detection part 7, and the controller 8 controls the front pump 2 and the rear pump 3 to meet the flow demand. At this time, the flow rates of the front pump 2 and the rear pump 3 can flow to the breaking hammer 4, but the flow rates of the front pump 2 and the rear pump 3 flowing to the breaking hammer 4 at the same time are obviously overlarge, the displacement ratio of the front pump 2 and the rear pump 3 is controlled by the controller 8, one of the front pump 2 and the rear pump 3 is adjusted to be the minimum displacement, and the other is adjusted to be the normal displacement, so that the total displacement of the front pump 2 and the rear pump 3 is just the flow demand of the breaking hammer during operation.
When the front pump 2 or the rear pump 3 is at the minimum displacement, the wear thereof is negligible, and when the front pump 2 or the rear pump 3 is at the normal displacement, the wear thereof is large. After working for a certain time, the working states of the front pump 2 and the rear pump 3 are switched through the controller, so that the wear states of the front pump 2 and the rear pump 3 are switched, the independent wear of the rear pump 3 is avoided, the front pump 2 and the rear pump 3 are worn to the same extent, and meanwhile, the efficiency of the front pump 2 and the efficiency of the rear pump 3 are improved.
It should be noted that the front pump 2 and the rear pump 3 are both started by the engine 13, which is the same as the case of the prior art and will not be described again here.
The pressure detecting component 7 may be a pressure sensor, or any other component capable of detecting pressure, and is not specifically limited herein, as long as it can detect pressure, and all of them are within the protection scope of the present invention.
EXAMPLE seven
In the breaking hammer control device according to the sixth embodiment, the first oil supply line is provided with the first displacement proportional control valve 9, the second oil supply line is provided with the second displacement proportional control valve 10, and the control end of the first displacement proportional control valve 9 and the control end of the second displacement proportional control valve 10 are both connected to the controller 8. When the controller 8 receives the pressure signal from the pressure detection unit 7, the controller 8 determines the hydraulic flow rate according to the pressure signal, and controls the first displacement proportional control valve 9 and the second displacement proportional control valve 10 so that one of the front pump 2 and the rear pump 3 has the minimum displacement and the other one has the normal output flow rate.
Example eight
On the basis of the seventh embodiment, a first pilot-controlled servo valve 11 is further arranged between the first displacement proportional control valve 9 and the front pump 2; a second hydraulic servo valve 12 is also provided between the second displacement proportional control valve 10 and the rear pump 3. After receiving the electric analog signal, the hydraulic control servo valve correspondingly outputs the modulated flow and pressure, and can convert a low-power weak electric input signal into high power. The controller 8 controls the control end of the first displacement proportional control valve 9, and the first hydraulic control servo valve 11 further controls the displacement of the front pump 2 after receiving an electric signal; similarly, the controller 8 controls the control end of the second displacement proportional control valve 10, and the second hydraulic control servo valve 12 further controls the displacement of the rear pump 3 after receiving the electric signal.
Example nine
Fig. 3 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 3: a processor (processor)310, a communication Interface (communication Interface)320, a memory (memory)330 and a communication bus 340, wherein the processor 310, the communication Interface 320 and the memory 330 communicate with each other via the communication bus 340. The processor 310 may invoke logic instructions in the memory 330 to perform a method of hydraulic control of a demolition hammer, the method comprising:
acquiring a hydraulic flow demand value during the operation of the breaking hammer;
setting a first working state and a second working state of both the front pump and the rear pump, wherein the first working state is the minimum displacement, and the second working state is the normal output flow; the sum of the minimum displacement and the normal output flow is equal to the hydraulic flow demand value;
setting one of the front pump and the rear pump as a first working state and the other as a second working state;
setting the switching time of the working states of the front pump and the rear pump;
and switching the working states of the front pump and the rear pump according to the switching time.
Example ten
The present embodiment also protects a work machine including: a breaking hammer control device according to any of the embodiments described above is provided.
EXAMPLE eleven
The present invention also provides a work machine comprising: the hydraulic control method of the breaking hammer is adopted to control the breaking hammer to carry out breaking operation.
In addition, the logic instructions in the memory 330 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions 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 also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method of hydraulic control of a breaking hammer provided by the above methods, the method comprising:
acquiring a hydraulic flow demand value during the operation of the breaking hammer;
setting a first working state and a second working state of both the front pump and the rear pump, wherein the first working state is the minimum displacement, and the second working state is the normal output flow; the sum of the minimum displacement and the normal output flow is equal to the hydraulic flow demand value;
setting one of the front pump and the rear pump as a first working state and the other as a second working state;
setting the switching time of the working states of the front pump and the rear pump;
and switching the working states of the front pump and the rear pump according to the switching time.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method of hydraulic control of a demolition hammer as provided above, the method comprising: acquiring a hydraulic flow demand value during the operation of the breaking hammer;
setting a first working state and a second working state of both the front pump and the rear pump, wherein the first working state is the minimum displacement, and the second working state is the normal output flow; the sum of the minimum displacement and the normal output flow is equal to the hydraulic flow demand value;
setting one of the front pump and the rear pump as a first working state and the other as a second working state;
setting the switching time of the working states of the front pump and the rear pump;
and switching the working states of the front pump and the rear pump according to the switching time.
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 place, or may be distributed on a plurality of 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, and 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 hydraulic control method for a breaking hammer is characterized by comprising the following steps:
acquiring a hydraulic flow demand value during the operation of the breaking hammer;
setting a first working state and a second working state of both the front pump and the rear pump, wherein the first working state is the minimum displacement, and the second working state is the normal output flow; the sum of the minimum displacement and the normal output flow is equal to the hydraulic flow demand value;
setting one of the front pump and the rear pump as a first working state and the other as a second working state;
setting the switching time of the working states of the front pump and the rear pump;
and switching the working states of the front pump and the rear pump according to the switching time.
2. The hydraulic control method of a breaking hammer according to claim 1, wherein in the step of obtaining the hydraulic flow demand value at the time of the breaking hammer operation, the hydraulic flow demand value is obtained by obtaining the pressure at the time of the breaking hammer operation through a breaking hammer control pilot valve and a pressure sensor.
3. The hydraulic control method of a breaking hammer according to claim 1, wherein in the step of setting the switching time of the operating states of the front pump and the rear pump, the switching time is set by a controller.
4. The hydraulic breaking hammer control method according to claim 1, wherein in the step of switching the operating states of the front pump and the rear pump according to the switching time, the front pump and the rear pump are respectively controlled by a controller to be switched between the first operating state and the second operating state.
5. The hydraulic breaking hammer control method according to claim 1, wherein in the step of switching the operating states of the front pump and the rear pump according to the switching time, the displacements of the front pump and the rear pump are controlled by respectively controlling a front pump displacement control solenoid proportional valve and a rear pump displacement solenoid proportional valve by a controller.
6. A hydraulic control device for a breaking hammer, comprising:
the hydraulic oil tank is used for providing hydraulic oil;
oil inlets of the front pump and the rear pump are communicated with the hydraulic oil tank, and oil outlets of the front pump and the rear pump are respectively connected with a first oil supply pipeline and a second oil supply pipeline;
the oil inlet of the main control valve is respectively communicated with the first oil supply pipeline and the second oil supply pipeline, and the oil outlet of the main control valve is connected with the breaking hammer;
the crushing pilot control valve is connected with the main control valve;
a pressure detection part connected in series to a pilot circuit of the crushing pilot control valve;
and the controller is used for receiving the pressure signal of the pressure detection part and controlling the opening of the main control valve and the crushing pilot control valve and the displacement proportion of the front pump and the rear pump.
7. The hydraulic breaker hammer control device of claim 6, wherein a first displacement proportional control valve is disposed on the first oil supply line, a second displacement proportional control valve is disposed on the second oil supply line, and a control end of the first displacement proportional control valve and a control end of the second displacement proportional control valve are both connected to the controller.
8. The hydraulic breaking hammer control device according to claim 7, wherein a first hydraulic-control servo valve is further provided between the first displacement proportional control valve and the front pump; and a second hydraulic control servo valve is also arranged between the second displacement proportional control valve and the rear pump.
9. A working machine, characterized by comprising the hydraulic breaker control apparatus of any one of claims 6-8.
10. An electronic device comprising a memory, a processor and a computer program stored on said memory and executable on said processor, characterized in that said processor, when executing said program, carries out the steps of the hydraulic control method of a breaking hammer according to any one of claims 1 to 5.
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| CN202210594017.9A CN114809163A (en) | 2022-05-27 | 2022-05-27 | Hydraulic control method and device for breaking hammer and working machine |
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| CN202210594017.9A CN114809163A (en) | 2022-05-27 | 2022-05-27 | Hydraulic control method and device for breaking hammer and working machine |
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