CN108818883B - Ceramic press electrohydraulic control method and system - Google Patents
Ceramic press electrohydraulic control method and system Download PDFInfo
- Publication number
- CN108818883B CN108818883B CN201810745799.5A CN201810745799A CN108818883B CN 108818883 B CN108818883 B CN 108818883B CN 201810745799 A CN201810745799 A CN 201810745799A CN 108818883 B CN108818883 B CN 108818883B
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- variable pump
- signal
- variable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 238000013016 damping Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 11
- 238000004146 energy storage Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 230000009471 action Effects 0.000 description 8
- 239000004744 fabric Substances 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/0063—Control arrangements
- B28B17/0081—Process control
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Presses (AREA)
Abstract
The invention relates to an electrohydraulic control method and system of a ceramic press. The invention relates to an electrohydraulic control method of a ceramic press, which comprises the following steps: acquiring a pressing preparation signal, and increasing the set pressure of the variable pump (3) according to the pressing preparation signal to enable the variable pump (3) to enter a large-displacement output state; and acquiring a pressing end signal, and recovering the original set pressure of the variable pump (3) according to the pressing end signal, so that the variable pump (3) enters a standby state. The ceramic press electrohydraulic control method provided by the invention reduces the pressure fluctuation range and more stably under the condition that the pressure minimum value of the existing ceramic press system is unchanged, and avoids unnecessary high pressure, thereby reducing the energy output by an oil pump and finally saving electric energy.
Description
Technical Field
The invention relates to the field of ceramic press electrohydraulic control, in particular to a ceramic press electrohydraulic control method and a ceramic press electrohydraulic control system.
Background
The automatic pressing state of the ceramic press mainly comprises the following execution actions in sequence: low-pressure primary compression, exhaust, low-pressure secondary compression, exhaust, medium-pressure primary compression, exhaust, medium-pressure secondary compression, high-pressure compression, return stroke, ejection and cloth standby, wherein the medium-pressure secondary compression and the high-pressure compression need larger pressure and flow. The other steps are executed with smaller needed pressure and flow, and the pressure is throttled and decompressed by the press control element. As shown in fig. 1, the conventional ceramic press electrohydraulic control system includes an accumulator 1e, a check valve 2e, a variable pump 3e, an oil tank 4e, a press actuator 5e, a press control element 6e, a damping orifice 7e, a pressure valve 8e, a variable piston 9e, and a pressure regulating valve 10e. In this system, the pressure valve 8e has a right chamber spring set pressure Pa, the regulator valve 10e has a pressure Pb, and the variable pump 3e has a pressure pc=pa+pb. When the ceramic press is in a material distribution standby state, if the pressure of the energy accumulator 1e is smaller than Pc, the left cavity of the pressure valve 8e is communicated with the energy accumulator 1e through the one-way valve 2e, so that the pressure of the left cavity of the pressure valve 8e is also smaller than Pc, the pressure of the right cavity of the pressure valve 8e is Pa+Pb=Pc, the pressure of the right cavity is larger than that of the left cavity, the right working position of the pressure valve 8e works, the rodless cavity of the variable piston 9e is communicated with the oil tank 4e through the pressure valve 8e, so that the pressure of the rodless cavity of the variable piston 9e is zero, under the action of the hydraulic pressure of the rod cavity of the variable piston 9e and the spring force, the variable pump 3e is output at the maximum flow rate, the pressure of the energy accumulator 1e is gradually increased, the left cavity of the pressure valve 8e is also increased, when the pressure of the left cavity of the pressure valve 8e is increased to Px (Px is slightly larger than Pc, px-Px=Pu, the variable mechanism of the variable pump 3e is worn seriously, the friction force is increased when the pressure of the variable piston is about 0.5 to 1.2 megaPa), the pressure of the left cavity 8e is larger than the left cavity of the pressure valve 8e, the pressure valve 8e is not increased to the position of the variable valve 3e, the variable valve 3e is not increased until the left cavity and the pressure valve 3e is not increased to the position of the variable valve 3e is not increased, and the variable valve 3e is not is in the working position is not changed to the position, and the variable valve 3e is not is left, and is not is in the position is not is in the state of the pressure 3 is not is moved to be in the pressure state. After the cloth is finished, the pressing action of the press execution element 5e is started, the pressure of the accumulator 1e is reduced, when the pressure is reduced by Pc, the one-way valve 2e is opened, the pressure of the accumulator 1e and the output port of the variable pump 3e is continuously reduced to Py (Py is slightly less than Pc, pc-Py=pw, pw is about between 0.5 and 1.2 megapascals, the more serious the variable mechanism of the variable pump 3 is worn out, the larger the friction force is, the larger the value of Pw is), the left cavity pressure of the pressure valve 8e is Py, the right cavity pressure is Pc, the right cavity pressure is greater than the left cavity, the right station of the pressure valve 8e is operated, the rodless cavity of the variable piston 9e is communicated with the oil tank 4e through the pressure valve 8e, therefore the rodless cavity pressure of the variable piston is zero, the variable piston 9e moves right under the action of the rod cavity pressure and spring force, the displacement of the variable pump 3e is maximized, the maximum flow output of the oil pump 3e is pressed after the middle pressure secondary and high pressure pressing is finished in turn, the pressure of the accumulator is reduced to the minimum value Pi, then in the two states of return and distribution, the variable pump 3e always outputs the maximum displacement, the energy of the accumulator 1e is supplemented, the pressure is increased, the pressure of the left cavity of the pressure valve 8e is also increased, when the pressure is increased to Px, the pressure of the left cavity of the pressure valve 8e is larger than that of the right cavity, the left station of the pressure valve 8e works, the rodless cavity of the variable piston 9e is communicated with the outlet of the variable pump 3e through the pressure valve 8e, although the rod cavity of the variable piston 9e is also communicated with the outlet of the variable pump 3e, the cross section area of the rod cavity is far smaller than that of the rodless cavity, the spring force of the rod cavity is smaller, the variable piston 9e moves leftwards, the displacement of the variable pump 3e is reduced until the output of the variable pump 3e is zero, the one-way valve 2e is closed, when the outlet pressure of the variable pump 3e is reduced to Pc, the left cavity of the pressure valve 8e and the right cavity are both Pc, the pressure valve 8e is in the state between the left station and the right station, the variable piston 9e does not increase or decrease the rod-free cavity liquid, the position of the variable piston 9e is not changed any more, the variable pump 3e maintains the output port pressure Pc unchanged, and the next pressing is carried out after the cloth is finished.
In the above system, the pressure set by the variable pump 3e is Pc, the pressure variation range of the output port of the actual variable pump 3e is Pi to Px, when the ceramic press is in the cloth standby state and the low-pressure pressing state, the pressure of the output port of the variable pump 3e is high pressure between Px and Py for most of the time, and in both states, high pressure is not required, thus energy waste is caused. The variable pump 3e is slow in response, so that the set pressure is Pc, and the actual pressure reaches Px, so that the flow of the variable pump 3e is changed from large to small; on the contrary, the set pressure is Pc, the actual pressure is reduced to Py, the flow of the variable pump 3e is changed from small to large, and the system pressure is greatly fluctuated.
Disclosure of Invention
Based on the above, a first object of the present invention is to provide a ceramic press electrohydraulic control method, which can reduce the pressure fluctuation range under the condition that the pressure minimum value of the existing ceramic press electrohydraulic control system is unchanged, the pressure is more stable, and unnecessary high pressure is avoided, so that the energy output by an oil pump is reduced, and finally the electric energy is reduced; a second object of the present invention is to provide a ceramic press electro-hydraulic control system that enables the pressure of the existing ceramic press electro-hydraulic control system to be more stable and that saves electrical energy.
The first object of the present invention is achieved by the following method:
an electrohydraulic control method of a ceramic press, comprising the following steps:
acquiring a pressing preparation signal, and according to the pressing preparation signal, increasing the set pressure of the variable pump 3 to enable the variable pump 3 to enter a large-displacement output state, wherein the method comprises the following steps: switching the direct communication state between the right cavity of the pressure valve 8 and the pressure end of the pressure regulating valve 10 to the state that the right cavity of the pressure valve 8 is communicated with the pressure end of the pressure regulating valve 10 through the second damping hole 11, wherein the pressing preparation signal is a master cylinder downward movement signal or a charging valve closing signal;
acquiring a pressing end signal, and recovering the original set pressure of the variable pump 3 according to the pressing end signal, so that the variable pump 3 enters a standby state, wherein the method comprises the following steps: the state that the right cavity of the pressure valve 8 is communicated with the pressure end of the pressure regulating valve 10 through the second damping hole 11 is switched to the state that the right cavity of the pressure valve 8 is directly communicated with the pressure end of the pressure regulating valve 10, wherein the pressing end signal is a charging valve opening signal or a master cylinder return signal.
The electrohydraulic control voltage-stabilizing energy-saving method of the ceramic press reduces the pressure fluctuation range and the pressure is more stable under the condition that the minimum pressure value of the existing ceramic press system is unchanged, thereby avoiding unnecessary high pressure, reducing the energy output by an oil pump and finally reducing the electric energy.
A second object of the invention is to provide an electrohydraulic control system of a ceramic press, as follows:
the utility model provides a ceramic press electrohydraulic control system, including energy storage ware 1, check valve 2, variable pump 3, oil tank 4, first damping hole 7, pressure valve 8, variable piston 9 and air-vent valve 10, the output of variable pump 3 communicates with energy storage ware 1 through check valve 2, the output of variable pump 3 communicates with the left chamber of pressure valve 8, the output of variable pump 3 communicates with the right chamber of pressure valve 8 through first damping hole 7, when pressure valve 8 is in the right station, the rodless chamber of variable piston 9 communicates with oil tank 4 through pressure valve 8, still include press control element 6 and solenoid valve 12, press control element 6 is each control element in the ceramic press system, solenoid valve 12 action makes the right chamber of pressure valve 8 communicate with the pressure end of air-vent valve 10 directly or through second damping hole 11.
Further, the hydraulic control system further comprises a throttle valve 13 and a PLC14, wherein the PLC14 controls the electromagnetic valve 12 to be in a power-on or power-off state according to the signal of the press control element 6, and when the pressure valve 8 is in a right station, the rodless cavity of the variable piston 9 is communicated with the oil tank 4 through the pressure valve 8 and the throttle valve 13.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of an electrohydraulic control system of a prior art ceramic press;
FIG. 2 is a schematic diagram of an electro-hydraulic control system of a ceramic press according to the present invention.
Detailed Description
Firstly, the invention provides an electrohydraulic control method of a ceramic press, which comprises the following steps after being in a material distribution standby state in the ceramic press treatment process:
step 1: acquiring a pressing preparation signal, and according to the pressing preparation signal, increasing the set pressure of the variable pump 3 to enable the variable pump 3 to enter a large-displacement output state;
step 2: and acquiring a pressing end signal, and recovering the original set pressure of the variable pump 3 according to the pressing end signal, so that the variable pump 3 enters a standby state.
The step 1 is performed by switching the direct communication state between the right chamber of the pressure valve 8 and the pressure end of the pressure regulating valve 10 to the communication state between the right chamber of the pressure valve 8 and the pressure end of the pressure regulating valve 10 through the second damping hole 11, specifically, by controlling the solenoid valve 12, and the solenoid valve 12 operates to switch the direct communication between the right chamber of the pressure valve 8 and the pressure end of the pressure regulating valve 10 to the communication state through the second damping hole 11.
In step 2, the state in which the right chamber of the pressure valve 8 is in communication with the pressure end of the pressure regulating valve 10 through the second orifice 11 is switched to the state in which the right chamber of the pressure valve 8 is in direct communication with the pressure end of the pressure regulating valve 10. Specifically, the control of the electromagnetic valve 12 is completed, and the electromagnetic valve 12 is de-energized to switch the state that the right cavity of the pressure valve 8 is communicated with the pressure end of the pressure regulating valve 10 through the second damping hole 11 to the state that the right cavity of the pressure valve 8 is directly communicated with the pressure end of the pressure regulating valve 10.
Wherein the hold down ready signal is a master cylinder down signal or a charge valve close signal.
Wherein, the pressing end signal is a charging valve opening signal or a master cylinder return signal.
Referring to fig. 2, the present invention further provides a system for implementing the above ceramic press electrohydraulic control method, which includes an accumulator 1, a check valve 2, a variable pump 3, an oil tank 4, a press executing element 5, a press control element 6, a first damping hole 7, a pressure valve 8, a variable piston 9, a pressure regulating valve 10, a second damping hole 11, an electromagnetic valve 12, a throttle valve 13 and a PLC14, wherein the PLC14 receives signals of the press control element, and controls the electromagnetic valve 12 to be powered on or powered off, when the electromagnetic valve 12 is powered off, a right cavity of the pressure valve 8 is communicated with a pressure end of the pressure regulating valve 10, and when the electromagnetic valve 12 is powered on, a right cavity of the pressure valve 8 is communicated with a pressure end of the pressure regulating valve 10 through the second damping hole 11.
The press control element is each control element in the ceramic press system, and comprises state signals of various instruments such as a master cylinder downward movement signal, a return signal, a liquid filling valve opening signal, a liquid filling valve closing signal and the like, and the press execution element is each mechanical or electric execution component in the ceramic press system.
The automatic pressing state of the ceramic press mainly comprises the following execution actions in sequence: low-pressure primary compression, exhaust, low-pressure secondary compression, exhaust, medium-pressure primary compression, exhaust, medium-pressure secondary compression, high-pressure compression, return stroke, ejection and cloth standby, wherein the medium-pressure secondary compression and the high-pressure compression need larger pressure and flow. The other steps are performed with less pressure and flow.
Here, if the pressure set by the pressure valve 8 is Pa and the pressure set by the regulator valve 10 is Pd, the pressure set by the variable displacement pump 3 is Pz, pz=pa+pd.
When the ceramic press just enters a material distribution standby state, the electromagnetic valve 12 is powered off, the right cavity of the pressure valve 8 is communicated with the pressure end of the pressure regulating valve 10 through the electromagnetic valve 12, the pressure of the energy accumulator 1 is smaller than PZ, the left cavity of the pressure valve 8 is communicated with the energy accumulator 1 through the one-way valve 2, therefore, the pressure of the left cavity of the pressure valve 8 is also smaller than PZ, the pressure of the right cavity of the pressure valve 8 is Pa+Pd=PZ, the pressure of the right cavity is larger than that of the left cavity, the pressure valve 8 is in a right station working state, the rodless cavity of the variable piston 9 is communicated with the oil tank 4 through the pressure valve 8 and the throttle valve 13, therefore, the pressure of the rodless cavity of the variable piston 9 is zero, the variable piston 9 moves rightwards under the action of the rod cavity pressure and the spring force of the variable piston 9, the variable pump 3 is in maximum displacement, the maximum flow output of the variable pump 3, the pressure of the energy accumulator 1 is gradually increased, the pressure of the left cavity of the pressure valve 8 is also increased, when the pressure rises to Py, (Py is slightly greater than Pz, py-pz=pu, pu is between about 0.5 and 1.2 mpa), at which time the sum of the right chamber pressure of the pressure valve 8 is Pz, the left chamber pressure of the pressure valve 8 is greater than the right chamber, the pressure valve 8 is switched to operate in the left position, the rodless chamber of the variable piston 9 is communicated with the outlet of the variable pump 3 through the pressure valve 8, although the rod chamber of the variable piston 9 is also communicated with the outlet of the variable pump 3, the cross-sectional area of the rod chamber is far smaller than that of the rodless chamber, the spring force of the rod chamber is small, therefore, the displacement of the variable piston 9 is reduced to the left, until the output is zero, at which time the one-way valve 2 is closed, the outlet pressure of the variable pump 3 is reduced to Pz, at which time the left chamber pressure valve 8 and the right chamber pressure are both Pz, the pressure valve 8 is in a state between the left position and the right position, the rodless chamber liquid of the variable piston 9 is in a steady state, the outlet pressure of the variable displacement pump 3 is maintained at Pz until the cloth is finished.
During the period before the end of the cloth and the low pressure one-time pressing, the press control element 6 outputs a pressing preparation signal to the PLC14, wherein the signal can be a signal of the downward movement of the master cylinder, or a signal of the closing of the liquid charging valve, etc., the PLC14 receiving the pressing preparation signal enables the electromagnetic valve 12 to be electrified, the electromagnetic valve 12 cuts off an oil path of the right cavity of the pressure valve 8 communicated with the pressure end of the pressure regulating valve 10, at the moment, the right cavity of the pressure valve 8 is communicated with the pressure end of the pressure regulating valve 10 through the second damping hole 11, at the moment, the pressure of the left cavity of the pressure valve 8 is Pz, the pressure of the pressure end of the pressure regulating valve 10 is Pd, the hydraulic pressure difference between the left cavity of the pressure valve 8 and the pressure end of the pressure regulating valve 10 is Pz-Pd=Pa, at the moment, the left cavity of the pressure valve 8 and the pressure end of the pressure regulating valve 10 are communicated through the first damping hole 7 and the second damping hole 11, therefore, the pressure difference before and after each damping hole is approximately equal to Pa/2, the pressure of the right cavity of the pressure valve 8 is equal to pd+pa/2+pa=pz+pa/2, the pressure of the right cavity of the pressure valve 8 is greater than the pressure of the left cavity, the pressure valve 8 is switched to a right station working state, the rodless cavity of the variable piston 9 is communicated with the oil tank 4 through the pressure valve 8, the throttle valve 13, the pressure of the rodless cavity of the variable piston 9 is zero, the variable piston 9 moves right under the action of the hydraulic pressure and the spring force of the rod cavity of the variable piston 9, the discharge capacity of the variable pump 3 becomes maximum, the maximum flow output of the variable pump 3 is achieved, the output pressure of the variable pump 3 reaches Py (before the variable pump 3 enters a zero discharge output standby state, the pressure of the accumulator 1 is supplemented to Py by the variable pump 3, the opening pressure of the check valve 2 is zero), and then the ceramic press enters a pressing stage.
When the high-pressure pressing is finished, the pressure of the accumulator 1 is reduced to the minimum value Pi in the pressure change range of the accumulator 1, at this time, a high-pressure pressing finishing signal, which can be a signal for opening a liquid charging valve or a signal for returning a main cylinder, is transmitted to the PLC14 by the ceramic press control element 6, after the PLC14 receives the signal, the electromagnetic valve 12 is de-energized, the right cavity of the pressure valve 8 can be communicated with the pressure end of the pressure regulating valve 10 through the electromagnetic valve 12, at this time, the pressure of the right cavity of the pressure valve 8 is changed to Pz again, the pressure of the right cavity of the pressure valve 8 is still greater than that of the left cavity, the variable pump 3 continues to supply energy to the accumulator 1 with large flow until the pressure rises to Py, at this time, the pressure of the right cavity of the pressure valve 8 is greater than that of the right cavity, the pressure valve 8 is switched to operate at a left station, the rodless cavity of the variable piston 9 is communicated with the outlet of the variable pump 3, the variable piston 9 is moved left, until the swing angle of the variable pump 3 is reduced until the output is zero, the one-way valve 2 is closed, the outlet pressure of the variable pump 3 is reduced to the pressure of the variable valve 3 is reduced until the left cavity and the pressure is not increased to the left cavity and the pressure is not in the state of the pressure is not changed to be the left, the pressure is not changed to the pressure, and the pressure of the variable pump is not changed to be the left by the pressure valve 3, and the pressure valve is not changed to be the pressure to the left, and the pressure valve 3 is not changed to be the pressure.
Further, at the instant when the electromagnetic valve 12 is powered on, the right cavity of the pressure valve 8 can be increased by Pa/2 due to the large Pa value, and the valve core of the pressure valve 8 can be rapidly moved in a large stroke, so that the displacement of the variable pump 3 can be suddenly increased, and in order to avoid the influence of rapid variable on the service life of the variable pump, an adjustable throttle valve 13 is arranged between the pressure valve 8 and the oil tank 4, and the displacement increasing speed of the variable pump 3 is controlled by adjusting the size of a throttle opening.
In summary, according to the invention, when the ceramic press is in the pressing state, a higher pressure is set for the variable pump, and when the ceramic press is in the material distribution standby state, the original set pressure is restored for the variable pump, so that the variable pump does not need to wait for the pressure of the energy accumulator to be reduced to a certain value and then increase the flow when the press is in the pressing state, but the variable pump is enabled to increase the discharge capacity when the ceramic press is in the pressing state; when the ceramic press enters a material distribution standby state, the variable pump recovers the original set pressure and enters a zero-displacement standby state at a relatively high speed, and the variable pump is kept at the original set pressure for standby. The pressure change range of the variable pump is reduced to Pi-Py when the variable pump works (because the variable pump in the existing ceramic press system and the variable pump in the ceramic press system enter the large-displacement output from zero displacement under the states of Py and Py respectively, the values Py and Py are almost equal in actual use under the condition of ensuring that the minimum pressure values are Pi), unnecessary high pressure is avoided, the hydraulic energy output by an oil pump is reduced, the energy output by a motor is reduced, the power consumption of the motor is reduced, and the energy consumption is saved.
According to the ceramic press electrohydraulic control method and the ceramic press electrohydraulic control system, the set pressure of the variable pump is improved according to the pressing preparation signal by acquiring the pressing preparation signal, and the variable pump is forced to quickly enter a large-displacement output state; and obtaining a pressing end signal, recovering the original set pressure of the variable pump according to the pressing end signal, and enabling the variable pump to enter a zero output standby state as soon as possible. The electrohydraulic control voltage-stabilizing energy-saving method of the ceramic press reduces the pressure fluctuation range and the pressure is more stable under the condition that the minimum pressure value of the existing ceramic press system is unchanged, thereby avoiding unnecessary high pressure, reducing the energy output by an oil pump and finally reducing the electric energy.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (3)
1. An electrohydraulic control method of a ceramic press is characterized by comprising the following steps:
acquiring a pressing preparation signal, and according to the pressing preparation signal, increasing the set pressure of the variable pump (3) to enable the variable pump (3) to enter a large-displacement output state, wherein the method comprises the following steps: switching the direct communication state of the right cavity of the pressure valve (8) and the pressure end of the pressure regulating valve (10) to the communication state of the right cavity of the pressure valve (8) and the pressure end of the pressure regulating valve (10) through a second damping hole (11), wherein the pressing preparation signal is a master cylinder downward movement signal or a charging valve closing signal;
acquiring a pressing end signal, and recovering the original set pressure of the variable pump (3) according to the pressing end signal, so that the variable pump (3) enters a standby state, wherein the method comprises the following steps: the communication state of the right cavity of the pressure valve (8) and the pressure end of the pressure regulating valve (10) is switched to the direct communication state of the right cavity of the pressure valve (8) and the pressure end of the pressure regulating valve (10) through the second damping hole (11), wherein the pressing end signal is a charging valve opening signal or a master cylinder return signal.
2. The utility model provides a ceramic press electrohydraulic control system, including energy storage ware (1), check valve (2), variable pump (3), oil tank (4), first damping hole (7), pressure valve (8), variable piston (9) and air-vent valve (10), the output of variable pump (3) is through check valve (2) and energy storage ware (1) intercommunication, the output of variable pump (3) is with the left chamber intercommunication of pressure valve (8), the output of variable pump (3) is through the right side chamber intercommunication of first damping hole (7) and pressure valve (8), when pressure valve (8) are in the right station, the rodless chamber of variable piston (9) is through pressure valve (8) and oil tank (4) intercommunication, its characterized in that: the ceramic press system further comprises a press control element (6) and an electromagnetic valve (12), wherein the press control element (6) is each control element in the ceramic press system, and the electromagnetic valve (12) acts to enable the right cavity of the pressure valve (8) to be directly communicated with the pressure end of the pressure regulating valve (10) or be communicated with the pressure end of the pressure regulating valve through a second damping hole (11).
3. An electro-hydraulic control system for a ceramic press as set forth in claim 2, wherein:
the automatic control device is characterized by further comprising a throttle valve (13) and a PLC (14), wherein the PLC (14) controls the electromagnetic valve (12) to be in a power-on or power-off state according to signals of the press control element (6), and when the pressure valve (8) is in a right station, a rodless cavity of the variable piston (9) is communicated with the oil tank (4) through the pressure valve (8) and the throttle valve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745799.5A CN108818883B (en) | 2018-07-09 | 2018-07-09 | Ceramic press electrohydraulic control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745799.5A CN108818883B (en) | 2018-07-09 | 2018-07-09 | Ceramic press electrohydraulic control method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108818883A CN108818883A (en) | 2018-11-16 |
| CN108818883B true CN108818883B (en) | 2023-11-14 |
Family
ID=64135756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810745799.5A Active CN108818883B (en) | 2018-07-09 | 2018-07-09 | Ceramic press electrohydraulic control method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108818883B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828415A (en) * | 2019-04-15 | 2020-10-27 | 杨储储 | Variable pump variable control device and variable pump variable control method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0777168A (en) * | 1993-09-07 | 1995-03-20 | Hitachi Constr Mach Co Ltd | Pump control device |
| JP2000283054A (en) * | 1999-03-29 | 2000-10-10 | Yuken Kogyo Co Ltd | Solenoid valve type two-pressure, two-capacity control variable pump |
| EP1716998A2 (en) * | 2005-04-26 | 2006-11-02 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Compaction control system by means of isostatic moulds |
| CN104514777A (en) * | 2013-09-29 | 2015-04-15 | 佛山市恒力泰机械有限公司 | Energy-saving servo control system of ceramic brick pressing machine |
| CN104875279A (en) * | 2015-04-16 | 2015-09-02 | 佛山职业技术学院 | Ejection device of sheet ceramic brick machine |
| CN205466701U (en) * | 2016-01-05 | 2016-08-17 | 佛山市恒力泰机械有限公司 | Ceramic brick machine's hydraulic drive system |
| CN205578385U (en) * | 2015-11-18 | 2016-09-14 | 邓贲 | Pressure control hydraulic system economizer |
| CN106286453A (en) * | 2016-10-13 | 2017-01-04 | 佛山市三水宏源陶瓷企业有限公司 | The double pressure system of ceramic brick press constant pressure variable displacement pump |
| CN107255094A (en) * | 2017-05-08 | 2017-10-17 | 佛山市恒力泰机械有限公司 | A kind of ceramic brick press energy saving in pumping station control method and device |
| CN107313995A (en) * | 2016-01-28 | 2017-11-03 | 邓贲 | A kind of force control hydraulic pressure energy saving of system method and its energy saver |
| CN208497258U (en) * | 2018-07-09 | 2019-02-15 | 广东天恒液压机械有限公司 | Ceramic press electrohydraulic control system |
-
2018
- 2018-07-09 CN CN201810745799.5A patent/CN108818883B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0777168A (en) * | 1993-09-07 | 1995-03-20 | Hitachi Constr Mach Co Ltd | Pump control device |
| JP2000283054A (en) * | 1999-03-29 | 2000-10-10 | Yuken Kogyo Co Ltd | Solenoid valve type two-pressure, two-capacity control variable pump |
| EP1716998A2 (en) * | 2005-04-26 | 2006-11-02 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Compaction control system by means of isostatic moulds |
| CN104514777A (en) * | 2013-09-29 | 2015-04-15 | 佛山市恒力泰机械有限公司 | Energy-saving servo control system of ceramic brick pressing machine |
| CN104875279A (en) * | 2015-04-16 | 2015-09-02 | 佛山职业技术学院 | Ejection device of sheet ceramic brick machine |
| CN205578385U (en) * | 2015-11-18 | 2016-09-14 | 邓贲 | Pressure control hydraulic system economizer |
| CN205466701U (en) * | 2016-01-05 | 2016-08-17 | 佛山市恒力泰机械有限公司 | Ceramic brick machine's hydraulic drive system |
| CN107313995A (en) * | 2016-01-28 | 2017-11-03 | 邓贲 | A kind of force control hydraulic pressure energy saving of system method and its energy saver |
| CN106286453A (en) * | 2016-10-13 | 2017-01-04 | 佛山市三水宏源陶瓷企业有限公司 | The double pressure system of ceramic brick press constant pressure variable displacement pump |
| CN107255094A (en) * | 2017-05-08 | 2017-10-17 | 佛山市恒力泰机械有限公司 | A kind of ceramic brick press energy saving in pumping station control method and device |
| CN208497258U (en) * | 2018-07-09 | 2019-02-15 | 广东天恒液压机械有限公司 | Ceramic press electrohydraulic control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108818883A (en) | 2018-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107542729B (en) | A kind of complex controll formula hydraulic pump and composite hydraulic control system | |
| CN107489664B (en) | A kind of load-sensitive and volumetric void fraction formula variable pump and electrohydraulic control system | |
| CN105156391A (en) | Composite variable pump and hydraulic control system using composite variable pump | |
| CN107489663B (en) | A kind of variable pump and the hydraulic control system with variable pump | |
| CN203420858U (en) | Novel hydraulic pump constant-flow output and standby state control structure | |
| CN110871591B (en) | High-speed forming press control system | |
| CN105090141A (en) | Hydraulic variable control system and vehicle | |
| CN108818883B (en) | Ceramic press electrohydraulic control method and system | |
| CN203532367U (en) | Multi-gear power control variable displacement piston pump | |
| CN208497258U (en) | Ceramic press electrohydraulic control system | |
| CN104612951B (en) | A kind of reciprocating compressor stepless tolerance regulating method and system | |
| CN108266413B (en) | Asymmetric electro-hydrostatic actuator based on pressure selection valve | |
| CN204851560U (en) | Positive flow control electric proportional pump | |
| CN214118617U (en) | Variable pump control valve | |
| CN216044686U (en) | Working hydraulic system of cantilever type aerial work platform | |
| CN114087244B (en) | Release-resisting oil circuit based on passive die opening working condition of press | |
| CN112377399A (en) | Variable pump variable control device and control method | |
| CN110131225B (en) | Hydraulic control loop and method for lower die locking cylinder of bending machine | |
| CN115091805A (en) | Remote pressure regulating and switching device of metal packing hydraulic machine and control method thereof | |
| CN103511369A (en) | Multi-gear power control variable piston pump | |
| CN107363239B (en) | Quick injection stop mechanism of magnesium alloy cold chamber die casting machine | |
| CN209671295U (en) | Compound variable pump and compound hydraulic control system | |
| CN113653688A (en) | Hydraulic control system and control method for core making machine | |
| CN214145843U (en) | Variable pump variable control device | |
| CN111734700A (en) | Engineering machine, hydraulic system and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |