CN116146549A - Hydraulic press pressure oil pressure regulating system, method and medium - Google Patents

Hydraulic press pressure oil pressure regulating system, method and medium Download PDF

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Publication number
CN116146549A
CN116146549A CN202310119891.1A CN202310119891A CN116146549A CN 116146549 A CN116146549 A CN 116146549A CN 202310119891 A CN202310119891 A CN 202310119891A CN 116146549 A CN116146549 A CN 116146549A
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oil
pressure
valve
hydraulic
regulating
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张振
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Tianjin Diguang Empire Mechanical Equipment Co ltd
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Tianjin Diguang Empire Mechanical Equipment Co ltd
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Priority to CN202310119891.1A priority Critical patent/CN116146549A/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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Control Of Presses (AREA)

Abstract

The application relates to a hydraulic press pressure oil pressure regulating system, a method and a medium, wherein the system specifically comprises the following steps: the hydraulic oil pump comprises a power oil pump, two oil ways and an oil tank, wherein a first oil return cavity is formed in the oil tank, one ends of the two oil ways are connected with an oil outlet end of the power oil pump together, the other ends of the two oil ways are connected with two oil cavities of a return cylinder respectively, the oil outlet end of the power oil pump is provided with a pressure oil high-low pressure switching module, and the pressure oil high-low pressure switching module comprises a hydraulic valve, a first regulating valve, a second regulating valve and a duplex electromagnetic valve. The hydraulic machine pressure oil pressure quick and stable switching device has the advantages that the quick and stable switching of the hydraulic machine pressure oil pressure is realized, a person can directly control the high/low pressure state of the hydraulic machine and the oil pressure value when the hydraulic machine is in the high/low pressure state through the control module, and unstable oil pressure inside the hydraulic machine can be corrected.

Description

Hydraulic press pressure oil pressure regulating system, method and medium
Technical Field
The application relates to the field of hydraulic machine control, in particular to a hydraulic machine pressure oil pressure regulating system, a hydraulic machine pressure oil pressure regulating method and a hydraulic machine pressure oil pressure regulating medium.
Background
The hydraulic press is an industrial equipment using liquid as working medium, and is commonly used for press shaping of metal, plastics, rubber and other materials. The hydraulic machine generally uses an oil pump as a power source, oil pressure is transmitted to a workpiece to be processed through a working medium by pascal effect, and required pressure values are different when the hydraulic machine executes different steps, so how to complete oil pressure switching control when the hydraulic machine executes different steps is a problem which the hydraulic machine must solve.
At present, for a hydraulic machine which only adjusts a single pressure valve to achieve the purpose of oil pressure control, stable switching of oil pressure cannot be achieved when oil pressure adjustment is carried out, and a higher speed is difficult to achieve when the oil pressure is switched, so that the process requirements cannot be met in certain working scenes requiring frequent pressure switching.
Disclosure of Invention
In order to ensure the rapid and stable oil pressure switching control of the hydraulic machine, the application provides a hydraulic machine pressure oil pressure regulating system, a hydraulic machine pressure oil pressure regulating method, hydraulic machine pressure oil pressure regulating equipment and a medium.
First aspect the present application provides a hydraulic press pressure oil pressure regulating system:
the hydraulic press pressure oil pressure regulating system comprises a power oil pump, two oil ways and an oil tank, wherein the oil tank comprises a first oil return cavity, one ends of the two oil ways are connected with an oil outlet end of the power oil pump together, the other ends of the two oil ways are respectively connected with two oil cavities of a return cylinder, the oil outlet end of the power oil pump is provided with a pressure oil high-low pressure switching module, the pressure oil high-low pressure switching module comprises a hydraulic valve, a first regulating valve, a second regulating valve and a duplex electromagnetic valve, and the duplex electromagnetic valve comprises two valve elements which are respectively a first electromagnetic valve and a second electromagnetic valve; the main oil port of the hydraulic valve is communicated with the oil outlet end of the power oil pump, the oil control port of the hydraulic valve is connected with the oil outlet of the second valve, the oil through port of the hydraulic valve is connected with the first valve, the second valve and the oil inlet port of the first electromagnetic valve, the oil outlet port of the first valve is connected with the oil inlet port of the second electromagnetic valve, and the oil outlet port of the second electromagnetic valve is communicated with the first oil return cavity for storing oil.
By adopting the technical scheme, the high-pressure oil supply control, the low-pressure oil supply control and the zero-pressure standby control of the hydraulic machine are completed, and the oil pressure stability during oil pressure switching is ensured by the oil pressure control system with multiple valves; when the hydraulic machine needs high-pressure operation, the first electromagnetic valve is opened, hydraulic oil flows to the second regulating valve through the hydraulic valve, and the second regulating valve is regulated to enable the hydraulic valve to form quantitative back pressure, so that the pressure of the hydraulic oil is increased at the moment; when the hydraulic machine needs low-pressure operation, the first electromagnetic valve is closed, the second electromagnetic valve is opened, hydraulic oil flows to the first valve and the second valve through the hydraulic valve at the same time, and the hydraulic oil flows to an oil return cavity communicated with the oil outlet of the duplex electromagnetic valve through the opened oil way part, so that the pressure of the hydraulic oil is lower at the moment, and the hydraulic oil supplies oil for the hydraulic machine; when the hydraulic machine is in a standby state, the first electromagnetic valve and the second electromagnetic valve are not electrified, all oil paths are opened, and hydraulic oil flows to an oil return cavity communicated with the duplex electromagnetic valve through all oil inlets of the hydraulic valve, so that the pressure of the hydraulic oil is zero at the moment; the switching of the three modes only needs personnel to key in the pressure information required by the current hydraulic machine through the control module, and the control module controls the first electromagnetic valve, the second electromagnetic valve, the first valve and the second valve, so that the personnel can quickly switch the working pressure of the hydraulic machine, and the linkage control of the multiple valves reduces the influence of external disturbance factors.
Preferably, the hydraulic oil pressure correction device further comprises an oil pressure correction oil circuit, wherein the oil pressure correction oil circuit comprises an adjusting oil pump and a correction valve, an oil inlet of the correction valve is connected with an oil outlet end of the adjusting oil pump, and the oil outlet end of the correction valve is communicated with a return cylinder B cavity which is communicated with the return cylinder and used for controlling the return cylinder to extend.
By adopting the technical scheme, an oil pressure value correction link is added in the oil pressure control system, so that pressure fluctuation caused by instability of a flow pulsation curve of the plunger oil pump during operation of the hydraulic machine is reduced.
Preferably, the hydraulic valve, the first valve, the second valve and the double electromagnetic valve can be controlled by the control module, and the double electromagnetic valve is connected with the control module so as to be controlled by the control module.
By adopting the technical scheme, the control module is used for controlling the oil pressure control system, so that the hydraulic press can quickly respond to personnel control signals when the oil pressure is switched; meanwhile, the control module can acquire the oil pressure control information of the hydraulic machine by personnel so that the hydraulic machine works under the requirements of the personnel.
Preferably, the oil tank further comprises a second oil return cavity, and the second oil return cavity and an oil outlet of the second regulating valve are communicated with an oil control port of the hydraulic valve.
Through adopting above-mentioned technical scheme, when the hydraulic press is in high oil pressure state, hydraulic oil all flows to the second valve that adjusts, and the oil-out intercommunication of adjusting the valve at the second goes up the second oil return chamber, makes the hydraulic press in high oil pressure state hydraulic oil can carry out once buffering in the second oil return chamber, has reduced the impact of high oil pressure to the valve body.
Preferably, the through flow of the first valve is greater than that of the second valve.
Through adopting above-mentioned technical scheme, when the hydraulic press is in low oil pressure state, hydraulic oil flows to first valve and the second valve of transferring simultaneously, and the through-flow of first valve of transferring is greater than the second valve of transferring, then hydraulic oil mostly can flow to the oil return chamber that communicates with the oil-out of duplex solenoid valve through first valve of transferring, makes the hydraulic pressure can be in lower oil pressure state and works.
Second aspect the present application provides a hydraulic press pressure oil pressure regulating method:
acquiring pressure information entered by personnel through a control module;
judging whether the pressure information is high oil pressure information or not according to a preset pressure standard;
if yes, the first electromagnetic valve is controlled to be opened so that hydraulic oil flows to the second regulating valve through the hydraulic valve, and then all hydraulic oil flows to the second oil return cavity communicated with the oil outlet of the second regulating valve through the opened oil way, so that the internal working pressure of the hydraulic machine is increased.
By adopting the technical scheme, when the hydraulic machine needs to work under high-pressure conditions, the hydraulic machine only needs to manually configure the needed pressure information, and the oil pressure regulating system automatically controls the related valve to enable the working oil pressure of the hydraulic machine to reach the corresponding process standard.
Preferably, after the step of determining whether the control signal type is the high oil pressure control signal, the method further includes the steps of: if not, the first electromagnetic valve is controlled to be closed, the second electromagnetic valve is controlled to be opened, so that hydraulic oil flows to the first valve and the second valve through the hydraulic valve simultaneously, the hydraulic oil flows to the first oil return cavity communicated with the oil outlet of the duplex electromagnetic valve through the opened oil path part, and the other part flows to the second oil return cavity communicated with the oil outlet of the second valve, so that the internal working pressure of the hydraulic machine is reduced.
By adopting the technical scheme, the high oil pressure and low oil pressure working state of the hydraulic machine are switched, the manual adjustment of the operation of the pressure regulating valve by personnel is avoided, and the automatic control is realized.
Preferably, the hydraulic press pressure oil pressure adjusting method further comprises an oil pressure correcting link, and specifically comprises the following steps:
acquiring a real-time pressure value inside a working cylinder in one working stroke of the hydraulic machine through a pressure sensor;
according to a real-time working curve of the hydraulic machine when the hydraulic machine works according to the real-time pressure value in the working cylinder in one working stroke of the hydraulic machine, the real-time working curve is a pressure-time function curve;
comparing the pressure value of each time point of the real-time working curve with the pressure information entered by the person, and calculating the difference value of the pressure value and the pressure information;
generating a pressure correction signal according to the difference value of the two;
converting the pressure correction signal into a flow opening signal according to a preset pressure-flow comparison table;
and controlling the opening flow of the correction valve according to the flow opening signal to finish oil pressure correction.
By adopting the technical scheme, unstable oil pressure of the hydraulic machine, which is generated due to unstable flow pulsation curve of the plunger pump, is stabilized, so that the hydraulic machine can generate stable oil pressure to adapt to a process with higher requirement on oil pressure stability.
In a third aspect, the present application provides a computer readable storage medium, which adopts the following technical solutions: a hydraulic press pressure oil pressure regulating system program capable of being loaded and executed by the processor is stored.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the hydraulic pressure value control of the hydraulic machine is realized, the switching between the high oil pressure state and the low oil pressure state of the hydraulic machine is completed, and the stability of the internal oil pressure value can be ensured when the hydraulic machine is switched with different oil pressure values;
2. the pressure value adjustment when the hydraulic machine works at high/low pressure is realized, so that the hydraulic machine can freely adjust the high/low pressure value according to different pressure value demands of different processes, and the universality of the hydraulic machine is improved;
3. the instability of the oil pressure of the hydraulic machine caused by unstable flow pulsation of the plunger pump is reduced, and an oil pressure correction link is introduced, so that the output oil pressure of the hydraulic machine reaches a relatively stable degree, and the hydraulic machine can meet the high-requirement process requirement.
Drawings
Fig. 1 is an oil circuit diagram of a hydraulic press pressure oil pressure regulating system according to an embodiment of the present application.
Fig. 2 is a flow chart of a hydraulic press pressure oil pressure regulating method according to an embodiment of the present application.
Fig. 3 is a flow chart of an oil pressure correction link in a hydraulic press pressure oil pressure adjustment method according to an embodiment of the present application.
Reference numerals illustrate: 1. a power oil pump; 2. a second oil return chamber; 3. a first oil return cavity; 4. a hydraulic valve; 5. a second valve; 6. a first valve; 7. a double electromagnetic valve; 7a, a first electromagnetic valve; 7b, a second electromagnetic valve; 8. a correction oil pump; 9. a correction valve; 10. an oil way I; 11. an oil path II; 12. and the pressure oil high-low pressure switching module.
Detailed Description
In order to make the technical solutions in the present specification better understood by those skilled in the art, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments.
The embodiment of the application discloses a hydraulic press pressure oil pressure regulating system. Referring to fig. 1, an oil path of a hydraulic press pressure oil pressure adjusting system includes: the device comprises a power oil pump 1, two oil ways leading to a cavity A of a return cylinder and a cavity B of the return cylinder and an oil tank, wherein the cavity A of the return cylinder controls the contraction of the return cylinder, the cavity B of the return cylinder controls the return extension of the return cylinder, a first oil return cavity 3 and a second oil return cavity 2 are arranged in the oil tank, one 10 ends of the two oil ways are fixedly connected to an oil outlet end of the power oil pump 1 and are communicated with the oil outlet end of the power oil pump 1, and the other ends of the two oil ways lead to the cavity A of the return cylinder and the cavity B of the return cylinder;
the oil outlet end of the power oil pump 1 is also communicated with a pressure oil pressure switching module, hydraulic oil is output by the power oil pump 1 and then passes through the pressure oil pressure switching module, hydraulic oil in different pressure working modes is split by the pressure oil pressure switching module and then led to two cavities of a return cylinder, the pressure oil pressure switching module comprises a hydraulic valve 4, a first regulating valve 6, a second regulating valve 5 and a double electromagnetic valve 7, and the double electromagnetic valve 7 is provided with two valve parts, namely a first electromagnetic valve 7a and a second electromagnetic valve 7b;
the oil outlet end of the power oil pump 1 is communicated with a main oil port of the hydraulic valve 4, an oil control port of the hydraulic valve 4 is connected with an oil outlet of the second regulating valve 5, an oil through port of the hydraulic valve 4 is connected with a first regulating valve 6, a second regulating valve 5 and an oil inlet port of the first electromagnetic valve 7a, an oil outlet of the first regulating valve 6 is connected with an oil inlet port of the second electromagnetic valve 7b, and an oil outlet of the second electromagnetic valve 7b is communicated with the first oil return cavity 3;
referring to fig. 1, the oil circuit of the hydraulic press pressure oil pressure regulating system further comprises an oil pressure correcting oil circuit, the oil pressure correcting oil circuit uses a regulating oil pump as a power source, the oil outlet end of the regulating oil pump is communicated with the oil inlet end of the correcting valve 9, and the oil outlet end of the correcting valve 9 is led to the cavity B of the return cylinder.
The power oil pump 1 adopts a plunger pump, the first regulating valve 6 and the second regulating valve 5 are pressure regulating valves, when the system is in a high/low pressure state, the output working oil pressure of the high/low pressure state of the system can be regulated by regulating the oil passing quantity of the first regulating valve 6 and the second regulating valve 5, wherein the first regulating valve 6 is set as a low-pressure regulating valve, the second regulating valve 5 is set as a high-pressure regulating valve, and the flow passing quantity of the first regulating valve 6 is larger than that of the second regulating valve 5; the first electromagnetic valve 7a and the second electromagnetic valve 7b are two valve members of a double electromagnetic valve 7; the correction valve 9 adopts a numerical control electrohydraulic valve, the correction valve 9 can respond to a quantitative pressure control signal sent by the control module, when the system needs to carry out oil pressure correction, the correction valve 9 receives the quantitative pressure control signal, and controls the magnitude of the input correction oil pressure according to the pressure adjustment quantity required by the quantitative pressure control signal, so as to correct the fluctuation of the oil pressure; since the correction oil pump 8 is used to compensate the oil pressure output from the power oil pump 1, the correction oil pump 8 is a low-power and low-flow oil pump, and is used to provide a certain correction pressure value for the hydraulic machine when the oil pressure is corrected.
The output working oil pressure of the system in a high/low pressure state is regulated specifically as follows, when the hydraulic machine pressure oil pressure regulating system regulates the working pressure state of the hydraulic machine, if the hydraulic machine is in a standby state, the first electromagnetic valve 7a and the second electromagnetic valve 7b are not electrified and are in an open state, at the moment, four A, B, C, D points in an oil path are all communicated, hydraulic oil flows out from the power oil pump 1 and directly flows to the first oil return cavity 3 through the hydraulic valve 4, and no hydraulic oil enters the return cylinder, so that the hydraulic machine is in a zero pressure state;
when the hydraulic machine works, if the hydraulic machine is executing the descending of the main sliding block or the pressing process step, high oil pressure is required to be output, at the moment, the first electromagnetic valve 7a is electrified and closed, B, C, D points in an oil path are disconnected from each other, hydraulic oil flows out from the power oil pump 1, flows to an oil through hole of the hydraulic valve 4 through a main oil hole of the hydraulic valve 4 and then flows to the second regulating valve 5, flows into an oil control hole of the hydraulic valve 4 after passing through the second regulating valve 5, the oil pressure output by the power oil pump 1 is basically all input into the return cylinder, and if the working oil pressure in the return cylinder is required to be regulated in a high-pressure state, the flow rate of the oil through holes of the second regulating valve 5 and the hydraulic valve 4 is only required to be regulated;
when the slide block resets after the pressing work of the hydraulic machine is finished or the hydraulic machine needs to replace a die, the hydraulic machine working oil pressure is required to be in a lower level, at the moment, the second electromagnetic valve 7B is sucked, the first electromagnetic valve 7a falls down, the point D and the point C, B in an oil path are disconnected, the point C is communicated with the point B, hydraulic oil flows out of the power oil pump 1 and flows to the first regulating valve 6 and the second regulating valve 5 simultaneously through the hydraulic valve 4, and most of the hydraulic oil flows into the first oil return cavity 3 through the two points C, B because the through flow of the first regulating valve 6 is larger than that of the second regulating valve 5, the hydraulic oil flowing into a return cylinder through the hydraulic valve 4 is reduced, the oil pressure in the return cylinder is reduced, and the hydraulic machine is in a low-pressure working state; the adjustment of the working oil pressure in the return cylinder in a low pressure state can be completed by adjusting two adjusting valves;
the method comprises the steps that an oil pump for adjusting an oil circuit provides correction oil pressure for a hydraulic machine, a pressure sensor is arranged on the inner wall of a working cylinder of the hydraulic machine when the hydraulic machine works, so that the pressure sensor can monitor the pressure value in the hydraulic machine in real time, the real-time pressure value of the hydraulic machine when the hydraulic machine works is obtained, the pressure-time function of the hydraulic machine is obtained according to the obtained real-time pressure value, namely, the real-time working curve of the hydraulic machine, the time pressure value of the real-time working curve of the hydraulic machine is compared with a pressure standard value entered by a person, the pressure difference value of the real-time working curve of the hydraulic machine is calculated, the pressure difference value curve is obtained, the flow required to be opened by a correction valve 9 is obtained according to a preset pressure-flow comparison table, the pressure-flow comparison table can be obtained by the person through experiments or calculation, the hydraulic oil continuously input to the working cylinder of the hydraulic machine is controlled according to the pressure difference flow curve, after the pressure difference curve corresponding to the difference value curve is fitted with the real-time working curve, and the internal working pressure tends to the pressure standard value when the hydraulic machine works, and therefore the pressure difference value is smaller than the preset standard difference value;
the implementation principle of the hydraulic press pressure oil pressure regulating system of the hydraulic press is as follows: through controlling the on-off state of the first electromagnetic valve 7a and the second electromagnetic valve 7b, the circulation condition of hydraulic oil in oil ways is controlled, and under different pressure requirement scenes, the hydraulic oil circulates in different oil ways, so that the hydraulic oil quantity which finally directly leads to a return cylinder is changed, and the working oil pressure value inside the return cylinder is changed. The added correction oil way is used for detecting the working pressure in the return cylinder to obtain the real-time working pressure of the hydraulic machine, then calculating to obtain the required correction oil pressure value when the hydraulic machine reaches the ideal working state, and controlling the correction valve 9 to correct the oil pressure value in the return cylinder.
The embodiment of the application also discloses a hydraulic press pressure oil pressure adjusting method. Referring to fig. 2, a hydraulic press pressure oil pressure adjustment method includes the steps of:
s201: acquiring pressure information entered by personnel through a control module;
specifically, according to the difference of the required pressure values of each step in the working stroke of the hydraulic machine, a person can key in pressure information to the control module, for example, in the pressing process of the hydraulic machine, the hydraulic machine needs a larger pressure value, and then the person can key in specific pressure information through the control module, wherein the key-in process can be finished through a keyboard and a mouse or can be finished through a touch pad;
s202: judging whether the pressure information is high oil pressure information or not according to a preset pressure standard;
specifically, the preset pressure standard needs to be set according to the actual working pressure range of the hydraulic machine, for example, 30% of the pressure value in front of the working pressure range of the hydraulic machine can be set to be high pressure, and when the pressure value corresponding to the input pressure information is 30% of the pressure value in front of the working pressure range of the hydraulic machine, the pressure value is judged to be a high oil pressure control signal;
s2021: the first electromagnetic valve 7a is controlled to be opened so that hydraulic oil flows to the second regulating valve 5 through the hydraulic valve 4, and then flows to the second oil return cavity 2 communicated with the oil outlet of the second regulating valve 5 through the opened oil way, so that the internal working pressure of the hydraulic machine is increased;
s2022: the first electromagnetic valve 7a is controlled to be closed, the second electromagnetic valve 7b is opened to enable hydraulic oil to flow to the first regulating valve 6 and the second regulating valve 5 simultaneously through the hydraulic valve 4, the hydraulic oil flows to the first oil return cavity 3 communicated with the oil outlet of the duplex electromagnetic valve 7 through the opened oil path part, and the other part flows to the second oil return cavity 2 communicated with the oil outlet of the second regulating valve 5, so that the internal working pressure of the hydraulic machine is reduced;
specifically, S2021 or S2022 is executed according to the difference of the determination result of S202, and if the control signal is determined to be a high oil pressure control signal, S2021 is executed to make the hydraulic machine enter into a high oil pressure state to operate; if it is determined that the control signal is not the high oil pressure control signal, S2022 is executed to make the hydraulic machine operate in the low oil pressure state.
Referring to fig. 3, the hydraulic press pressure oil pressure adjusting method further includes an oil pressure correcting link, including the following steps:
s301: acquiring a real-time pressure value inside a working cylinder in one working stroke of the hydraulic machine through a pressure sensor;
specifically, the pressure sensor is arranged on the inner wall of the working cylinder of the hydraulic machine, can detect the real-time pressure value in the working cylinder, and the model of the pressure sensor can be selected by a person skilled in the art according to the working pressure range in the hydraulic machine, and is not described herein;
s302: according to a real-time working curve of the hydraulic machine when the hydraulic machine works according to the real-time pressure value in the working cylinder in one working stroke of the hydraulic machine, the real-time working curve is a pressure-time function curve;
specifically, the pressure sensor detects the pressure value in the hydraulic machine working cylinder, a pressure-time function is drawn as a real-time working curve of the hydraulic machine, the time interval of detection of the pressure sensor is 1ms, the hydraulic machine starts working, real-time recording is carried out, and the pressure-time function is fitted to a plurality of data points;
s303: comparing the pressure value of each time point of the real-time working curve with the pressure information entered by the person, and calculating the difference value of the pressure value and the pressure information;
specifically, a comparison can be performed at a time interval of 5ms, a pressure value of the hydraulic press which is input by a person and hopefully works is used as a comparison standard, a real-time working curve is calculated and is different from a input pressure standard value, a difference value of the two is obtained, and a calculation result is used as a standard of subsequent oil pressure correction;
s304: generating a pressure correction signal according to the difference value of the two;
specifically, calculating the pressure difference between the two to obtain a pressure difference curve, comparing the pressure difference with a preset pressure-flow comparison table to obtain the flow required to be opened by the correction valve 9, obtaining a difference flow curve, wherein the pressure-flow comparison table can be obtained by a person through experiments or calculation, controlling hydraulic oil continuously input by the correction valve 9 to a working cylinder of the hydraulic machine according to the difference flow curve, and adjusting the time difference of the hydraulic oil input through delay, so that after the pressure difference curve corresponding to the difference flow curve is fitted with a real-time working curve, the internal working pressure of the hydraulic machine tends to a pressure standard value during working, and the pressure difference is smaller than the preset standard value;
s305: converting the pressure correction signal into a flow opening signal according to a preset pressure-flow comparison table;
specifically, the correction valve 9 adopts a numerical control electrohydraulic valve, when the correction valve 9 receives a quantitative pressure control signal, the flow opening of the correction valve 9 is controlled to be small according to a required correction pressure value contained in the pressure control signal, the correction valve 9 opens corresponding flow, correction oil pressure is input to the working cylinder, the real-time working state of the working cylinder is adjusted, and when the internal pressure of the working cylinder of the hydraulic machine is stable;
s306: controlling the opening flow of the correction valve 9 according to the flow opening signal to finish oil pressure correction;
specifically, the correction oil pressure is input into the hydraulic machine through the correction valve 9, and the real-time pressure value in the hydraulic machine is instantaneously changed, so that the input of the correction oil pressure adopts a delay input method, and the pressure difference value is reduced through a curve fitting mode, so that the real-time pressure value gradually becomes stable.
The implementation principle of the correction link of the hydraulic press pressure oil pressure regulating method of the embodiment of the application is as follows:
the hydraulic machine taking the plunger pump as a power source outputs oil pressure which is closely related to a flow pulsation curve of the plunger pump, a plurality of movable plungers are arranged in the plunger pump, and each plunger reciprocates in a period; the flow pulsation curve of each plunger is a sine function, and the movement between each plunger is not synchronous, so that a certain phase shift exists between the flow pulsation curves of a plurality of plungers, so that the flow pulsation curve of the plunger pump is known to be a disjoint part of the flow pulsation curve of each plunger, and the pressure value output by the hydraulic machine taking the plunger pump as a power source is unstable in actual operation; in actual operation, the flow pulsation curve of the plunger pump is not smooth due to actual production, and a plurality of fluctuations and flaws exist, which also cause unstable oil pressure input by the plunger pump of the hydraulic machine; the real-time pressure value of the hydraulic machine during working is obtained through the pressure sensor, the real-time pressure value and the standard pressure difference value are calculated, a quantitative control signal is generated to adjust the correction valve 9 to correct the internal pressure value of the hydraulic machine, and the output pressure of the hydraulic machine tends to be stable.
The embodiment of the application also discloses a computer readable storage medium.
Specifically, the computer readable storage medium stores a computer program that can be loaded by a processor and execute a hydraulic press pressure oil pressure adjustment method as one described above, the computer readable storage medium including, for example: a U-disk, a removable hard disk, a Read-only memory (ROM), a random access memory (RandomAccessMemory, RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. A hydraulic press pressure oil pressure governing system, its characterized in that: the hydraulic oil pump comprises a power oil pump (1), two oil ways and an oil tank, wherein the oil tank comprises a first oil return cavity (3), one ends of the two oil ways are commonly connected with an oil outlet end of the power oil pump (1), the other ends of the two oil ways are respectively connected with two oil cavities of a return cylinder, the oil outlet end of the power oil pump (1) is provided with a pressure oil high-low pressure switching module (12), the pressure oil high-low pressure switching module (12) comprises a hydraulic valve (4), a first regulating valve (6), a second regulating valve (5) and a duplex electromagnetic valve (7), and the duplex electromagnetic valve (7) comprises two valve elements, namely a first electromagnetic valve (7 a) and a second electromagnetic valve (7 b); the main oil port of the hydraulic valve (4) is communicated with the oil outlet end of the power oil pump (1), the oil control port of the hydraulic valve (4) is connected with the oil outlet of the second regulating valve (5), the oil port of the hydraulic valve (4) is connected with the oil inlet port of the first regulating valve (6), the second regulating valve (5) and the first electromagnetic valve (7 a), the oil outlet port of the first regulating valve (6) is connected with the oil inlet port of the second electromagnetic valve (7 b), and the oil outlet port of the second electromagnetic valve (7 b) is communicated with the first oil return cavity (3) for storing oil.
2. The hydraulic press pressure oil pressure regulating system according to claim 1, wherein: the hydraulic oil pressure correction device is characterized by further comprising an oil pressure correction oil circuit, wherein the oil pressure correction oil circuit comprises an adjusting oil pump and a correction valve (9), an oil inlet of the correction valve (9) is connected with an oil outlet end of the adjusting oil pump, and the oil outlet end of the correction valve (9) is communicated with a return cylinder B cavity which is communicated with the return cylinder and used for controlling the return cylinder to extend.
3. The hydraulic press pressure oil pressure regulating system according to claim 1, wherein: the hydraulic valve (4), the first valve (6), the second valve (5) and the double electromagnetic valve (7) are controlled by the control module, and the double electromagnetic valve (7) is connected with the control module to be controlled by the control module.
4. The hydraulic press pressure oil pressure regulating system according to claim 1, wherein: the oil tank further comprises a second oil return cavity (2), and the second oil return cavity (2) is communicated with an oil outlet of the second regulating valve (5) and an oil control port of the hydraulic valve (4).
5. The hydraulic press pressure oil pressure regulating system according to claim 2, wherein: the correction valve (9) is a digital control electrohydraulic valve, the first regulating valve (6) and the second regulating valve (5) are both pressure regulating valves to regulate input oil pressure, and the correction valve (9), the first regulating valve (6) and the second regulating valve (5) are coupled with the control module to be controlled by the control module.
6. The hydraulic press pressure oil pressure regulating system according to claim 1, wherein: the flow rate of the first regulating valve (6) is larger than that of the second regulating valve (5).
7. A method of a hydraulic machine pressure oil pressure regulating system according to any one of claims 1 to 5, comprising the steps of:
acquiring pressure information entered by personnel through a control module;
judging whether the pressure information is high oil pressure information or not according to a preset pressure standard;
if yes, the first electromagnetic valve (7 a) is controlled to be opened so that hydraulic oil flows to the second regulating valve (5) through the hydraulic valve (4), and then all the hydraulic oil flows to the second oil return cavity (2) communicated with the oil outlet of the second regulating valve (5) through the opened oil way, so that the internal working pressure of the hydraulic machine is increased.
8. The hydraulic press pressure oil pressure regulating method according to claim 7, further comprising, after the step of judging whether the control signal type is high oil pressure information, the steps of:
if not, the first electromagnetic valve (7 a) is controlled to be closed, the second electromagnetic valve (7 b) is controlled to be opened, so that hydraulic oil flows to the first regulating valve (6) and the second regulating valve (5) simultaneously through the hydraulic valve (4), the hydraulic oil flows to the first oil return cavity (3) communicated with the oil outlet of the duplex electromagnetic valve (7) through the opened oil path part, and the other part flows to the second oil return cavity (2) communicated with the oil outlet of the second regulating valve (5), so that the internal working pressure of the hydraulic machine is reduced.
9. The hydraulic machine pressure oil pressure regulating method as set forth in claim 7, further comprising the steps of:
acquiring a real-time pressure value inside a working cylinder in one working stroke of the hydraulic machine through a pressure sensor;
according to a real-time working curve of the hydraulic machine when the hydraulic machine works according to the real-time pressure value in the working cylinder in one working stroke of the hydraulic machine, the real-time working curve is a pressure-time function curve;
comparing the pressure value of each time point of the real-time working curve with the pressure information entered by the person, and calculating the difference value of the pressure value and the pressure information;
generating a pressure correction signal according to the difference value of the two;
converting the pressure correction signal into a flow opening signal according to a preset pressure-flow comparison table;
and controlling the opening flow of the correction valve (9) according to the flow opening signal to finish oil pressure correction.
10. A computer readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which performs the method according to any of claims 7 to 9.
CN202310119891.1A 2023-02-15 2023-02-15 Hydraulic press pressure oil pressure regulating system, method and medium Pending CN116146549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310119891.1A CN116146549A (en) 2023-02-15 2023-02-15 Hydraulic press pressure oil pressure regulating system, method and medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310119891.1A CN116146549A (en) 2023-02-15 2023-02-15 Hydraulic press pressure oil pressure regulating system, method and medium

Publications (1)

Publication Number Publication Date
CN116146549A true CN116146549A (en) 2023-05-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310119891.1A Pending CN116146549A (en) 2023-02-15 2023-02-15 Hydraulic press pressure oil pressure regulating system, method and medium

Country Status (1)

Country Link
CN (1) CN116146549A (en)

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