CN113374663B - Hydraulic pump flow regulating device based on high-speed switch valve and regulating method - Google Patents
Hydraulic pump flow regulating device based on high-speed switch valve and regulating method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 74
- 238000013016 damping Methods 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 5
- 230000001276 controlling effect Effects 0.000 claims description 11
- 238000004088 simulation Methods 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 238000013528 artificial neural network Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 7
- 239000003245 coal Substances 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 3
- 230000000875 corresponding effect Effects 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to the field of mechanical equipment of fully mechanized coal mining faces, and particularly relates to a hydraulic pump flow regulating device and a regulating method based on a high-speed switch valve. The valve comprises a valve body fixedly connected with a pump head, wherein an overflowing hole and a damping hole are formed in a pore passage of the pump head, wherein the pore passage is connected with a liquid suction valve assembly and a liquid discharge valve assembly; the valve body is internally provided with a cavity A and a cavity B, the cavity A is internally provided with a pilot valve core, the cavity B is internally provided with a main valve core, the upper part of the main valve core is provided with a spring, and the upper part of the spring is in contact connection with a plug installed on the surface of the valve body. The pilot valve core is connected with an output shaft of the linear motor; the valve body is internally provided with a main overflowing hole, a main liquid discharging hole, a left overflowing hole and a right overflowing hole, the left overflowing hole is communicated with the right overflowing hole through an annular groove, the left overflowing hole is communicated with the main overflowing hole through a cavity A, one end of the main overflowing hole is communicated with the damping hole, the other end of the main overflowing hole is communicated with the upper part of a cavity B, one end of the main liquid discharging hole is communicated with the lower part of the cavity B, and the other end of the main liquid discharging hole is communicated with the right overflowing hole and the outside.
Description
Technical Field
The invention belongs to the field of mechanical equipment of fully mechanized coal mining faces, and particularly relates to a hydraulic pump flow regulating device and a regulating method based on a high-speed switch valve.
Background
The hydraulic support of the fully mechanized mining face is an important component of three-machine coordinated actions, and is timely pushed according to the coal cutting speed of a coal cutter, so that high-efficiency production is realized. The power source of the hydraulic support is a hydraulic pump station, when a hydraulic pump station system supplies liquid to the hydraulic support, the supply flow needs to be adjusted in time according to different liquid supply amounts corresponding to actions of lifting a column, lowering the column, pushing the sliding rack and pulling the rack of the hydraulic support, so that the pressure of the system is kept in a certain range, and the high efficiency and stability of hydraulic operation are realized. At present, a hydraulic pump is mainly driven by a variable frequency motor on a fully mechanized mining face, pressure of a system is monitored to feed back to a frequency converter, flow is adjusted by controlling the rotating speed of the motor, and the fully mechanized mining face has the defects of slow response, lag of liquid supply and the like, particularly, the lag is more obvious during remote liquid supply, timely and effective actions of a support are seriously influenced, and therefore production efficiency is influenced.
As the fully mechanized coal mining face system is in high pressure and large flow, part of students propose to control the discharge flow of the pump by controlling the closing time of the liquid suction valve to enable the medium to generate backflow on the liquid suction valve. The hydraulic system at the fully mechanized mining face has high pressure and large flow, is influenced by hydraulic power, directly controls the opening and closing of the liquid suction and discharge valves of the hydraulic pump, and has extremely large required control force and low maneuverability. The invention provides a hydraulic pump pilot type flow regulating device based on a high-speed switch valve, namely when a plunger is in a liquid discharge stroke, a controller is used for opening a part of regulating devices of the plunger, so that a medium discharged by the reciprocating motion of the corresponding plunger is directly discharged through a valve body, and the flow of a pump is regulated. On the basis, by identifying the flow required by the action of the support control valve and the corresponding action, the linear motor is timely even ahead of the action of the support control valve through the controller, so that the flow of the system is slightly larger than the flow required by the action of the support, the pressure is stabilized in a certain range, the problems of slow response, large pressure fluctuation and the like of the traditional variable-frequency control flow are solved, and the self-adaptive fast control of the pressure flow is realized.
Disclosure of Invention
The invention provides a hydraulic pump flow regulating device and a regulating method based on a high-speed switch valve, aiming at solving the problems of action lag, slow flow response, large pressure fluctuation and the like of a variable-frequency liquid supply system adopted by the conventional hydraulic support.
The invention adopts the following technical scheme: a hydraulic pump flow regulating device based on a high-speed switch valve comprises a valve body fixedly connected with a pump head, wherein a liquid suction valve component and a liquid discharge valve component are arranged in the pump head, and a through-flow hole and a damping hole are formed in a pore passage of the pump head, wherein the liquid suction valve component is connected with the liquid discharge valve component; the valve body is internally provided with a cavity A and a cavity B, the cavity A is internally provided with a pilot valve core, the cavity B is internally provided with a main valve core, the upper part of the main valve core is provided with a spring, and the upper part of the spring is in contact connection with a plug installed on the surface of the valve body. The pilot valve core is connected with an output shaft of the linear motor, so that the pilot valve core can move left and right; the valve body in be provided with main discharge orifice, main drainage hole, left side discharge orifice and right side discharge orifice, wherein the left side discharge orifice communicates with each other with the right side discharge orifice through the ring channel of valve body bottom, the left side discharge orifice communicates with each other with main discharge orifice through cavity A, main discharge orifice one end communicates with the damping orifice, the other end communicates with each other with cavity B upper portion, main drainage hole one end communicates with cavity B lower part, the other end is linked together with right side discharge orifice and external world respectively.
Furthermore, a damper is arranged in the damping hole.
Furthermore, the valve body is connected with the pump head through a bolt, and a plurality of seals are arranged between the binding surfaces.
Further, the linear motor is connected with the valve body through a bolt.
The pump absorbs liquid from the liquid inlet, the controller controls the motors in the high-speed switch valves corresponding to the different plungers through 5 control circuits respectively, the flow through the liquid outlet is regulated and controlled by regulating the liquid return amount of the liquid absorption valve, and the regulated flow enters the bracket oil cylinder through the bracket control valve. Meanwhile, the controller controls the left position and the right position of the bracket control valve to be switched through two control lines, so that the bracket oil cylinder ascends and descends.
A regulation and control method of a hydraulic pump flow regulation device based on a high-speed switch valve comprises the following steps.
S1, respectively connecting a controller with motors in high-speed switch valves corresponding to different plungers through a plurality of control lines, and then connecting the controller with a bracket operating valve through two control lines, wherein the bracket operating valve is connected with a bracket oil cylinder.
S2, building a system simulation model based on AMESIM, calculating typical actions of the hydraulic support such as extending a column, descending the column, pushing a sliding frame and pulling the frame, calculating flow q and delay time t corresponding to the speed v of the hydraulic cylinder and the length L of the pipeline, and verifying by adopting a method.
And S3, training a PSO-BP-based neural network by taking the simulation data of the groups larger than 50 as samples, obtaining an adaptive prediction model with different actions, the speed v of the hydraulic cylinder and the length L of the pipeline as input, and the flow q and the delay time t as input, and verifying through the data of the groups larger than 10.
S4, aiming at the output flow q, designing an opening strategy of the plunger corresponding to the switch valve, namely when the flow demand is large, 5 switch valves are not opened, and all the flow enters the hydraulic cylinder from the liquid discharge valve; when the flow demand is small, a certain switch valve can be opened to enable part of the flow to return to the liquid tank, and the flow of the system is reduced; when the flow demand is 0, all 5 valves are opened, all the valves flow back, and the flow entering the support is 0. The continuous adjustment of the flow can be realized by changing the control quantity of the corresponding motors of the plungers.
And S5, when the controller plans to control the operating valve to execute a certain action, controlling the on-off of the 5 plungers corresponding to the high-speed switch valve through a preset program according to the advance time t, and controlling the normal work and the load relief of one or more plungers, so that the flow of the whole pump is adjusted, and the liquid supply flow is matched with the action flow of the bracket.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention provides a pilot-operated unloading valve driven by a linear motor, which can be used in the field of high-pressure large-flow hydraulic systems.
(2) The invention provides a flow regulating method based on a hydraulic support action instruction, which is characterized in that the flow of a system is regulated and controlled by recognizing the action of a hydraulic support and operating a support valve and even operating the opening and closing of a linear motor in a pump in advance, so that the pressure of the system is in a certain range, and the problems of slow flow response and pressure fluctuation of the traditional liquid supply system are solved.
Drawings
FIG. 1 is a schematic diagram of a hydraulic pump flow regulating device based on a high-speed switching valve according to the present invention;
FIG. 2 is a schematic view of the adaptive support supply regulation based on the support motion command of the present invention;
in the figure, 1-pump head, 2-liquid suction valve component, 3-liquid discharge valve component, 4-damper, 5-linear motor, 6-valve body, 7-pilot valve core, 8-main valve core, 9-spring, 10-plug, 11-controller, 12-support operating valve, 13-pump liquid discharge port, 14-pump liquid inlet, 15-support oil cylinder.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and examples, which are implemented on the premise of the technical solution of the present invention, and give detailed embodiments and specific operation procedures, but the scope of the present invention is not limited to the following examples.
As shown in fig. 1, a hydraulic pump flow regulating device based on a high-speed switch valve comprises a valve body 6 fixedly connected with a pump head 1, wherein the valve body 6 is connected with the pump head through a bolt. The pump head 1 is internally provided with a liquid suction valve component 2 and a liquid discharge valve component 3, and when the plunger moves, the suction and discharge of working media are completed. An overflowing hole 1.1 and a damping hole 1.2 are formed in a pore passage of the pump head 1, which is connected with the liquid suction valve assembly 2 and the liquid discharge valve assembly 3; the pilot-operated valve is characterized in that a cavity A and a cavity B are arranged in the valve body 6, a pilot valve core 7 is arranged in the cavity A, a main valve core 8 is arranged in the cavity B, a spring 9 is arranged on the upper portion of the main valve core 8, the upper portion of the spring 9 is connected with a plug 10 arranged on the surface of the valve body 6 in a contact mode, the pilot valve core 7 is connected with an output shaft of the linear motor 5, the pilot valve core can move left and right, and the pilot valve is opened and closed. Valve body 6 in be provided with main discharge orifice 6.1, main weeping hole 6.2, the discharge orifice 6.3 is crossed in the left side and the discharge orifice 6.4 is crossed on the right side, wherein the discharge orifice 6.3 is crossed on the left side communicates with each other with the discharge orifice 6.4 is crossed on the right side through the ring channel of 6 bottoms of valve body, the discharge orifice 6.3 is crossed on the left side communicates with each other with main discharge orifice 6.1 through cavity A, main discharge orifice 6.1 one end communicates with each other with damping hole 1.2, the other end communicates with each other with cavity B upper portion, main weeping hole 6.2 one end communicates with cavity B lower part, the other end is linked together with discharge orifice 6.4 and the external world respectively on the right side.
The flow regulation principle is as follows: when the plunger is in the liquid suction stroke, working medium descending the plunger enters from the liquid suction valve 2 to finish liquid suction, at the moment, the linear motor 5 is not powered, the pilot valve element 7 is closed, the upper cavity pressure and the lower cavity pressure of the main valve element 8 are consistent, the main valve element 8 is closed under the action of the elastic force of the spring 9, and the process is consistent with the liquid suction stroke of the traditional plunger pump; when the plunger is in a liquid discharge stroke, the controller gives a signal to enable the linear motor 5 to control the pilot valve core 7 to move left and open, a working medium passes through the damper 4, the main overflowing hole 6.1, the left overflowing hole 6.3, the annular groove and the right overflowing hole 6.4 to reach the main liquid discharge hole 6.2, a liquid path is conducted to generate pressure drop, the pressure of the upper part of the main valve core 8 is smaller than that of the lower part, the main valve core 8 is opened, liquid flow passes through the main valve and is discharged through the main liquid discharge hole 6.2, and the flow passing through the liquid discharge valve component 3 is reduced. The pump is circumferentially and uniformly provided with 5 and 7 plungers and corresponding adjusting devices, and the flow of the pump is controlled by controlling the opening number of the plungers corresponding to the linear motor 5.
As shown in fig. 2, the pump sucks liquid from the liquid suction port 14, the controller 11 controls 5 different plungers corresponding to the motor 5 in the high-speed switch valve through 5 control lines, the flow through the liquid discharge port 13 is regulated and controlled by regulating the liquid return amount through the liquid suction valve 2, and the regulated flow enters the bracket oil cylinder 15 through the bracket operating valve 12. Meanwhile, the controller 11 controls the left and right switching of the poppet operating valve 12 through two control lines, so that the plunger is raised and lowered.
A support liquid supply regulation and control method of a hydraulic pump flow regulation device based on a high-speed switch valve comprises the following steps.
S1, respectively connecting a controller 11 with motors 5 in high-speed switch valves corresponding to different plungers through 5 control lines, then connecting the controller 11 with a bracket operating valve 12 through two control lines, and connecting the bracket operating valve 12 with a bracket oil cylinder 15.
S2, building a system simulation model based on AMESIM, calculating typical actions of extending a column, descending the column, pushing and pulling a frame, a hydraulic cylinder speed v, and flow q and delay time t corresponding to different pipeline lengths L of the hydraulic support 15, and verifying by adopting a method.
And S3, training a PSO-BP-based neural network by taking the simulation data of the groups larger than 50 as samples, obtaining an adaptive prediction model with different actions, the speed v of the hydraulic cylinder and the length L of the pipeline as input, and the flow q and the delay time t as input, and verifying through the data of the groups larger than 10.
S4, aiming at the output flow q, designing an opening strategy of the plunger corresponding to the switch valve, namely when the flow demand is large, 5 switch valves are not opened, and all the flow enters the hydraulic cylinder from the liquid discharge valve; when the flow demand is small, a certain switch valve can be opened to enable part of the flow to return to the liquid tank, and the flow of the system is reduced; when the flow demand is 0, all 5 valves are opened, all the valves flow back, and the flow entering the support is 0; the continuous adjustment of the flow can be realized by changing the control quantity of the corresponding motors of the plungers.
And S5, when the controller plans to control the operating valve to execute a certain action, controlling the on-off of the 5 plungers corresponding to the high-speed switch valve through a preset program according to the advance time t, and controlling the normal work and load relief of one or more plungers, so that the flow of the whole pump is adjusted, and the liquid supply flow is matched with the action flow of the bracket.
Claims (4)
1. The utility model provides a hydraulic pump flow regulator based on high-speed ooff valve which characterized in that: the device comprises a valve body (6) fixedly connected with a pump head (1), wherein a liquid suction valve component (2) and a liquid discharge valve component (3) are arranged in the pump head (1), and an overflowing hole (1.1) and a damping hole (1.2) are formed in a pore passage of the pump head (1) where the liquid suction valve component (2) is connected with the liquid discharge valve component (3); a cavity A and a cavity B are arranged in the valve body (6), a pilot valve core (7) is arranged in the cavity A, a main valve core (8) is arranged in the cavity B, a spring (9) is arranged at the upper part of the main valve core (8), the upper part of the spring (9) is in contact connection with a plug (10) arranged on the surface of the valve body (6), and the pilot valve core (7) is connected with an output shaft of the linear motor (5) so that the pilot valve core can move left and right; the valve body (6) is internally provided with a main overflowing hole (6.1), a main liquid discharge hole (6.2), a left overflowing hole (6.3) and a right overflowing hole (6.4), wherein the left overflowing hole (6.3) is communicated with the right overflowing hole (6.4) through an annular groove at the bottom of the valve body (6), the left overflowing hole (6.3) is communicated with the main overflowing hole (6.1) through a cavity A, one end of the main overflowing hole (6.1) is communicated with a damping hole (1.2), the other end of the main overflowing hole is communicated with the upper part of the cavity B, one end of the main liquid discharge hole (6.2) is communicated with the lower part of the cavity B, and the other end of the main liquid discharge hole is respectively communicated with the right overflowing hole (6.4) and the outside;
a damper (4) is arranged in the damping hole;
when the plunger is in a liquid suction stroke, working medium descending the plunger enters from the liquid suction valve assembly (2) to finish liquid suction, at the moment, the linear motor (5) is not powered, the pilot valve core (7) is closed, the pressure of the upper cavity of the main valve core (8) is consistent with the pressure of the lower cavity, and the main valve core (8) is closed under the action of the elastic force of the spring (9); when the plunger is in a liquid discharge stroke, the controller gives a signal to enable the linear motor (5) to control the left of the pilot valve core (7) to move away and open, a working medium passes through the damper (4), the main overflowing hole (6.1), the left overflowing hole (6.3) and the annular groove and the right overflowing hole (6.4) to reach the main liquid discharge hole (6.2), a liquid path is conducted to generate pressure drop, the pressure of the upper part of the main valve core (8) is smaller than that of the lower part, so that the main valve core (8) is opened, liquid flow is discharged through the main valve through the main liquid discharge hole (6.2), and the flow passing through the liquid discharge valve component (3) is reduced; the pump is circumferentially and uniformly provided with 5 or 7 plungers and corresponding hydraulic pump flow regulating devices of the high-speed switch valves, and the flow of the pump is controlled by controlling the opening number of the plungers corresponding to the linear motors (5).
2. The high-speed switching valve-based hydraulic pump flow rate adjusting device according to claim 1, wherein: the valve body (6) is connected with the pump head through a bolt, and a plurality of seals are arranged between binding surfaces.
3. The high-speed switching valve-based hydraulic pump flow rate adjusting device according to claim 1, wherein: the linear motor (5) is connected with the valve body (6) through a bolt.
4. The method for regulating and controlling the liquid supply of the bracket of the flow regulating device of the hydraulic pump based on the high-speed switch valve as claimed in claim 1, wherein the method comprises the following steps: comprises the following steps of (a) carrying out,
s1, a controller (11) is respectively connected with motors (5) in high-speed switch valves corresponding to different plungers through a plurality of control lines, then the controller (11) is connected with a bracket operating valve (12) through two control lines, and the bracket operating valve (12) is connected with a bracket oil cylinder (15);
s2, building a system simulation model based on AMESIM, calculating typical actions of a support oil cylinder (15) in a column extending mode, a column descending mode, a pushing sliding mode and a pulling frame mode, hydraulic cylinder speed v, flow q and delay time t corresponding to different pipeline lengths L, and verifying by adopting a method;
s3, training a PSO-BP-based neural network by taking the simulation data of more than 50 groups as samples to obtain an adaptive prediction model with different actions, the hydraulic cylinder speed v and the pipeline length L as input, and the flow q and the delay time t as input, and verifying through the data of more than 10 groups;
s4, aiming at the output flow q, designing an opening strategy of the plunger corresponding to the switch valve, namely when the flow demand is large, 5 switch valves are not opened, and all the flow enters the hydraulic cylinder from the liquid discharge valve; when the flow demand is small, a certain switch valve can be opened to enable part of the flow to return to the liquid tank, and the flow of the system is reduced; when the flow demand is 0, all 5 valves are opened, all the valves flow back, the flow entering the bracket is 0, and the continuous adjustment of the flow can be realized by changing the control quantity of the motors corresponding to the plungers;
and S5, when the controller plans to control the operating valve to execute a certain action, controlling the on-off of the 5 plungers corresponding to the high-speed switch valve through a preset program according to the advance time t, and controlling the normal work and the load relief of one or more plungers, so that the flow of the whole pump is adjusted, and the liquid supply flow is matched with the action flow of the bracket.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110717154.2A CN113374663B (en) | 2021-06-28 | 2021-06-28 | Hydraulic pump flow regulating device based on high-speed switch valve and regulating method |
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| CN202110717154.2A CN113374663B (en) | 2021-06-28 | 2021-06-28 | Hydraulic pump flow regulating device based on high-speed switch valve and regulating method |
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| CN113374663A CN113374663A (en) | 2021-09-10 |
| CN113374663B true CN113374663B (en) | 2022-10-04 |
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