CN208497258U - Ceramic press electrohydraulic control system - Google Patents
Ceramic press electrohydraulic control system Download PDFInfo
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- CN208497258U CN208497258U CN201821083627.8U CN201821083627U CN208497258U CN 208497258 U CN208497258 U CN 208497258U CN 201821083627 U CN201821083627 U CN 201821083627U CN 208497258 U CN208497258 U CN 208497258U
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Abstract
The utility model relates to a kind of ceramic press electrohydraulic control systems.A kind of ceramic press electrohydraulic control system described in the utility model, including accumulator, check valve, variable pump, fuel tank, first damping hole, pressure valve, variable piston and pressure regulator valve, the output of variable pump is connected to by check valve with accumulator, the output of variable pump is connected to the left chamber of pressure valve, the output of variable pump is connected to by the first damping hole with the right chamber of pressure valve, when pressure valve is in right working position, the rodless cavity of variable piston is connected to by pressure valve with fuel tank, it further include solenoid valve, electromagnetism valve events make the right chamber of pressure valve directly be connected to the pressure end of pressure regulator valve 10 or be connected to by the second damping hole.In the case that ceramic press electrohydraulic control system described in the utility model keeps existing ceramic press system pressure minimum value constant, range of pressure fluctuations reduces, and pressure is more stable, and unnecessary high pressure is avoided to occur, to reduce the energy of oil pump output, electric energy is finally saved.
Description
Technical field
The utility model relates to ceramic press electrichydraulic control fields, more particularly to a kind of ceramic press electrichydraulic control system
System.
Background technique
Ceramic press, which is suppressed state in order automatically and mainly had, following executes movement: low pressure is once suppressed, exhaust, low
Secondary compacting to be pressed, is vented, the middle primary compacting of pressure, exhaust, the middle secondary compacting of pressure, high pressure compacting, backhaul, ejection, cloth is standby,
In, the middle secondary compacting of pressure needs pressure and flow larger with high pressure compacting.Other steps execute movement, required pressure and flow
It is smaller, it is set by press control element expenditure and pressure.As shown in Figure 1, existing ceramic press electrohydraulic control system includes accumulator
1e, check valve 2e, variable pump 3e, fuel tank 4e, press executive component 5e, press control element 6e, damping hole 7e, pressure valve 8e,
Variable piston 9e and pressure regulator valve 10e.In the system, pressure valve 8e right chamber spring sets pressure as Pa, and pressure regulator valve 10e sets pressure
For Pb, the pressure that variable pump 3e is set is Pc=Pa+Pb.When ceramic press is in cloth standby mode, if accumulator 1e
Pressure be less than Pc, pressure valve 8e left chamber is connected to by check valve 2e with accumulator 1e, therefore pressure valve 8e left chamber pressure is also small
In Pc, pressure valve 8e right chamber pressure is Pa+Pb=Pc, and right chamber pressure is greater than left chamber, the work of pressure valve 8e right working position, variable piston
9e rodless cavity is connected to by pressure valve 8e with fuel tank 4e, therefore variable piston 9e rodless cavity pressure is zero, is had in variable piston 9e
Under the action of rod cavity hydraulic coupling and spring force, variable piston 9e is moved to right, and variable pump 3e is exported with maximum stream flow, accumulator 1e pressure
It is gradually increased, pressure valve 8e left chamber pressure also increases with it, and when pressure rise is to Px, (Px is slightly larger than Pc, Px-Pc=Pu, Pu
About between 0.5 to 1.2 megapascal, the stroking mechanism abrasion of variable pump 3e is more serious, and frictional force is bigger, and the value of Pu is bigger), pressure
Valve 8e left chamber pressure is greater than right chamber, the left station work of pressure valve 8e, and variable piston 9e rodless cavity passes through pressure valve 8e and variable pump
3e outlet, variable piston 9e are moved to left, and variable pump 3e pivot angle reduces, and until variable pump 3e output is zero, check valve 2e is closed,
When variable pump 3e outlet pressure is reduced to Pc, pressure valve 8e left chamber is connected to always with variable pump 3e delivery outlet, at this time pressure valve 8e
Left chamber and right chamber pressure are all Pc, and pressure valve 8e is in state, variable piston 9e rodless cavity liquid between left station and right working position
Do not increase and do not subtract, the position variable piston 9e no longer changes, variable pump 3e maintain delivery outlet pressure be Pc it is constant, wait cloth terminate into
Enter compacting state.After cloth, press executive component 5e compacting movement starts, and accumulator 1e pressure starts to reduce, and works as pressure
When reducing Pc, check valve 2e is opened, accumulator 1e and variable pump 3e delivery outlet pressure continue to be reduced to Py (Py is slightly less than Pc,
Pc-Py=Pw, Pw are about between 0.5 to 1.2 megapascal, and the stroking mechanism abrasion of variable pump 3 is more serious, and frictional force is bigger, Pw's
It is worth bigger) when, pressure valve 8e left chamber pressure is Py, and right chamber pressure is Pc, and right chamber pressure is greater than left chamber, pressure valve 8e right working position work
Make, variable piston 9e rodless cavity is connected to by pressure valve 8e with fuel tank 4e, therefore variable piston rodless cavity pressure is zero, in variable
Under the action of piston 9e rod chamber hydraulic coupling and spring force, variable piston 9e is moved to right, and variable pump 3e discharge capacity fades to maximum, oil pump 3e
Maximum stream flow output, after pressing secondary compacting and high pressure compacting successively in the middle, energy storage pressure drops to minimum value Pi, then
In two states of backhaul and cloth, maximum pump discharge exports variable pump 3e always, and accumulator 1e energy is supplemented, pressure liter
Height, pressure valve 8e left chamber pressure also increase with it, and when pressure rise is to Px, pressure valve 8e left chamber pressure is greater than right chamber, pressure
The left station work of valve 8e, variable piston 9e rodless cavity is by pressure valve 8e and variable pump 3e outlet, although variable piston 9e
Rod chamber is also to be connected to variable pump 3e delivery outlet, but rod chamber sectional area is much smaller than rodless cavity, in addition rod chamber spring force
Smaller, variable piston 9e is moved to left, and variable pump 3e discharge capacity reduces, and until variable pump 3e output is zero, check valve 2e is closed, variable pump
When 3e outlet pressure is reduced to Pc, pressure valve 8e left chamber and right chamber pressure are all Pc at this time, and pressure valve 8e is in left station and the right side
State between station, variable piston 9e rodless cavity liquid, which does not increase, not to be subtracted, and the position variable piston 9e no longer changes, and variable pump 3e is maintained
Delivery outlet pressure is that Pc is constant, to the end of cloth, is suppressed next time.
In above system, for the pressure that variable pump 3e is set as Pc, it is Pi that real variable, which pumps 3e delivery outlet pressure range,
To Px, when ceramic press is in cloth standby mode and low pressure compacting state, variable pump 3e delivery outlet pressure most of the time
The high pressure between Px and Py, and both states, all do not need high pressure, cause the waste of energy.This is because variable pump
3e is slow in reacting to cause, and the pressure set is Pc, and actual pressure will reach Px, and variable pump 3e flow just can be from large to small；
Conversely, the pressure set is Pc, actual pressure will reduce to Py, variable pump 3e flow can just change from small to big, and system pressure will
There is biggish fluctuation.
Utility model content
Based on this, existing ceramic press electrohydraulic control system can be made the purpose of the utility model is to provide a kind of
Pressure is more stable and saves the ceramic press electrohydraulic control system of electric energy.
The utility model is achieved by the following scheme:
A kind of ceramic press electrohydraulic control system, including accumulator (1), check valve (2), variable pump (3), fuel tank (4),
One damping hole (7), pressure valve (8), variable piston (9) and pressure regulator valve (10), the output of variable pump (3) by check valve (2) with
Accumulator (1) connection, the output of variable pump (3) are connected to the left chamber of pressure valve (8), and the output of variable pump (3) passes through the first resistance
Buddhist nun hole (7) is connected to the right chamber of pressure valve (8), and when pressure valve (8) is in right working position, the rodless cavity of variable piston (9) passes through pressure
Power valve (8) is connected to fuel tank (4), further includes solenoid valve (12), and solenoid valve (12) movement makes the right chamber and tune of pressure valve (8)
The pressure end of pressure valve 10 is directly connected to or is connected to by the second damping hole (11).
It further, further include (14) PLC, the PLC (14) controls the electromagnetism according to the signal of press control element
Valve (12) is in obtain electric or power failure state.
It further, further include throttle valve (13), when pressure valve (8) is in right working position, the rodless cavity of variable piston (9) is logical
Excess pressure valve (8) and throttle valve (13) are connected to fuel tank (4).
In order to better understand and implement, according to the present invention will be described in detail below with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is prior art ceramic press electrohydraulic control system schematic diagram；
Fig. 2 is the utility model ceramic press electrohydraulic control system schematic diagram.
Specific embodiment
Referring to Fig. 2, a kind of ceramic press electrohydraulic control system provided by the utility model, including accumulator 1, check valve
2, variable pump 3, fuel tank 4, press executive component 5, press control element 6, the first damping hole 7, pressure valve 8, variable piston 9, tune
Pressure valve 10, the second damping hole 11, solenoid valve 12, throttle valve 13 and PLC14, PLC14 receive the signal of press control element, control
Solenoid valve 12 is powered or power loss, and when 12 power loss of solenoid valve, the right chamber of pressure valve 8 is connected to the pressure end of pressure regulator valve 10, solenoid valve
When 12 energization, the right chamber of pressure valve 8 is connected to by the second damping hole 11 with the pressure end of pressure regulator valve 10.
Press control element is each control element in ceramic press system, including master cylinder moves down, returned signal, filling liquid
The status signal of the various instrument such as valve opening, shutdown signal, press executive component be each mechanical in ceramic press system or
Electric execution unit.
The utility model ceramic press, which is suppressed state in order automatically and mainly had, following executes movement: low pressure is once pressed
System, exhaust, low-pressure secondary compacting, exhaust, the middle primary compacting of pressure, exhaust, the middle secondary compacting of pressure, high pressure compacting, backhaul, ejection,
Cloth is standby, wherein the middle secondary compacting of pressure needs pressure and flow larger with high pressure compacting.Other steps execute movement, institute
Need pressure and flow smaller.
Wherein, the pressure that pressure valve 8 is set as Pa, the pressure that pressure regulator valve 10 is set as Pd, then variable pump 3 set pressure
For Pz, Pz=Pa+Pd.
When ceramic press has just enter into cloth standby mode, the right chamber of 12 power loss of solenoid valve, pressure valve 8 passes through solenoid valve 12
It is connected to the pressure end of pressure regulator valve 10, the pressure of accumulator 1 is less than Pz at this time, and the left chamber of pressure valve 8 passes through check valve 2 and accumulation of energy
Device 1 is connected to, and therefore, 8 left chamber pressure of pressure valve is Pa+Pd=Pz again smaller than Pz, 8 right chamber pressure of pressure valve, and right chamber pressure is greater than
Left chamber, pressure valve 8 are in right working position working condition, and the rodless cavity of variable piston 9 is connected by pressure valve 8, throttle valve 13 and fuel tank 4
It is logical, therefore 9 rodless cavity pressure of variable piston is zero, under the action of 9 rod chamber hydraulic coupling of variable piston and spring force, variable is living
Plug 9 moves to right, and variable pump 3 is in maximum pump discharge, the output of 3 maximum stream flow of variable pump, and 1 pressure of accumulator is gradually increased, and pressure valve 8 is left
Cavity pressure also increases with it, and when pressure rise is to Py*, (Py* is slightly larger than Pz, and Py*-Pz=Pu*, Pu* are about 0.5 to 1.2 million
Between pa), 8 right chamber pressure of pressure valve and be Pz at this time, 8 left chamber pressure of pressure valve is greater than right chamber, and pressure valve 8 is switched to left station
Work, 9 rodless cavity of variable piston is by pressure valve 8 and 3 outlet of variable pump, although 9 rod chamber of variable piston is also and becomes
Amount pump 3 delivery outlets connection, but rod chamber sectional area is much smaller than rodless cavity, rod chamber spring force is smaller in addition, and therefore, variable is living
Plug 9 moves to left, and 3 discharge capacity of variable pump reduces, until output is zero, check valve 2 is closed at this time, and 3 outlet pressure of variable pump is reduced to Pz
When, 8 left chamber of pressure valve and right chamber pressure are all Pz at this time, and pressure valve 8 is in state, variable piston between left station and right working position
9 rodless cavity liquid are in stable state, and the delivery outlet pressure of variable pump 3 is maintained Pz, until cloth terminates.
Before cloth terminates once to suppress with low pressure in this period, press control element 6 exports a compacting and prepares
For signal to PLC14, this signal can be the signal etc. that the signal that master cylinder moves down or prefill valve are closed, and it is quasi- to receive compacting
It is electric that the PLC14 of standby signal obtains solenoid valve 12, what the right chamber of 12 cut-out pressure valve 8 of solenoid valve was connected to the pressure end of pressure regulator valve 10
Oil circuit, 8 right chamber of pressure valve is connected to by the second damping hole 11 with 10 pressure end of pressure regulator valve at this time, at this time 8 left chamber pressure of pressure valve
For Pz, 10 pressure end pressure of pressure regulator valve is Pd, and 8 left chamber of pressure valve and 10 pressure end hydraulic coupling difference of pressure regulator valve are Pz-Pd=Pa, and
8 left chamber of pressure valve is to be connected to by the first damping hole 7 with the second damping hole 11 at this time with 10 pressure end of pressure regulator valve, therefore each resistance
Pressure difference before and after Buddhist nun hole is approximately equal to Pa/2, therefore 8 right chamber pressure of pressure valve is equal to Pd+Pa/2+Pa=Pz+Pa/2, therefore pressure
8 right chamber pressure of valve is greater than left chamber pressure, and pressure valve 8 is switched to right working position working condition, and 9 rodless cavity of variable piston passes through pressure valve
8, throttle valve 13 is connected to fuel tank 4, and 9 rodless cavity pressure of variable piston is zero, in 9 rod chamber hydraulic coupling of variable piston and spring force
Under the action of, variable piston 9 moves to right, and 3 discharge capacity of variable pump becomes maximum, and the output of 3 maximum stream flow of variable pump, variable pump 3 is defeated at this time
Out pressure reach Py* (variable pump 3 enter zero delivery output it is standby before, 1 pressure of accumulator adds to Py* by variable pump 3,
The utility model regards 2 cracking pressure of check valve as zero), ceramic press enters pressing stage therewith.
After high pressure compacting, 1 pressure of accumulator drops to the minimum value Pi in 1 pressure range of accumulator, this
When ceramic press control element 6 send mono- high pressure compacting end signal of PLC14 to, can be the signal of prefill valve opening, or
Person is the signal etc. of master cylinder backhaul, after PLC14 receives this signal, makes 12 power loss of solenoid valve, 8 right chamber of pressure valve can pass through electromagnetism
Valve 12 is connected to 10 pressure end of pressure regulator valve, and 8 right chamber pressure of pressure valve becomes Pz again at this time, and 8 right chamber pressure of pressure valve is still big
In left chamber, variable pump 3 continues big flow and supplements energy to accumulator 1, until pressure rises to Py*, 8 right chamber pressure of pressure valve at this time
Power is Pz, and 8 left chamber pressure of pressure valve is greater than right chamber, and pressure valve 8 is switched to left station work, and 9 rodless cavity of variable piston passes through pressure
3 outlet of power valve 8 and variable pump, variable piston 9 move to left, and 3 pivot angle of variable pump reduces, until output is zero, check valve 2 is closed
It closes, when 3 outlet pressure of variable pump is reduced to Pz, 8 left chamber of pressure valve is connected to always with 3 delivery outlet of variable pump, and pressure valve 8 is left at this time
Chamber and right chamber pressure are all Pz, and pressure valve 8 is in state, 9 rodless cavity liquid of variable piston between left station and right working position and does not increase
Do not subtract, 9 position of variable piston no longer changes, and it is that Pz is constant that variable pump 3, which maintains delivery outlet pressure, until cloth terminates, under
Primary compacting.
Further, electric moment is obtained in solenoid valve 12, since Pa value is larger, 8 right chamber of pressure valve can be because unexpected be hydraulic
Power increases Pa/2, and big stroke fast moves the spool of pressure valve 8, and variable pump 3 can also increase discharge capacity suddenly, in order to avoid quick
Variable influences variable pump generation time, and adjustable throttling 13 has been added between pressure valve 8 and fuel tank 4, by adjusting restriction
Size is increased speed to control the discharge capacity of variable pump 3.
In conclusion the utility model for variable pump by setting one higher when ceramic press is in compacting state
Pressure restore former setting pressure when ceramic press is in cloth standby mode for variable pump, it is thus achieved that when press into
When entering to suppress state, variable pump is reduced to certain value without waiting for energy storage pressure and increases flow again, but ceramic press into
Enter compacting state simultaneously, variable pump is allowed to increase discharge capacity；When ceramic press enters cloth standby mode, variable pump restores former setting
Pressure, and zero delivery standby mode is entered with comparatively faster speed, variable pump is standby with original setting pressure pressure maintaining.Variable pump work
Pressure range about reduces to Pi~Py* (because of variable pump and the utility model ceramics in existing ceramic press system when making
Variable pump in press system is to enter huge discharge output by zero delivery in the case where pressure is Py and Py* state respectively, so protecting
In the case that card minimum pressure values are all Pi, Py* and Py value is almost equal in actual use), avoid unnecessary high extrusion
It is existing, reduce the hydraulic energy of oil pump output, thereby reduce the energy of motor output, so that less motor power consumption, is saved
Energy consumption.
The utility model ceramic press electrohydraulic control system, by obtain suppress ready signal, according to compacting ready signal,
It improves variable pump and sets pressure, and force variable pump to rapidly enter huge discharge output state with this；Obtain compacting end signal, root
According to compacting end signal, restore variable pump original and set pressure, and makes variable pump enter zero output standby mode as early as possible with this.This
Ceramic press electrichydraulic control voltage-stabilizing and energy-saving method described in utility model keeps existing ceramic press system pressure minimum value constant
In the case where, range of pressure fluctuations reduces, and pressure is more stable, avoids unnecessary high pressure from occurring, to reduce oil pump output
Energy, finally reduce electric energy.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.
Claims (4)
1. a kind of ceramic press electrohydraulic control system, including accumulator (1), check valve (2), variable pump (3), fuel tank (4), first
The output of damping hole (7), pressure valve (8), variable piston (9) and pressure regulator valve (10), variable pump (3) by check valve (2) and stores
Energy device (1) is connected to, and the output of variable pump (3) is connected to the left chamber of pressure valve (8), and the output of variable pump (3) passes through the first damping
Hole (7) is connected to the right chamber of pressure valve (8), and when pressure valve (8) is in right working position, the rodless cavity of variable piston (9) passes through pressure
Valve (8) is connected to fuel tank (4), it is characterised in that: further includes solenoid valve (12), solenoid valve (12) movement makes pressure valve (8)
Right chamber be directly connected to the pressure end of pressure regulator valve (10) or be connected to by the second damping hole (11).
2. a kind of ceramic press electrohydraulic control system according to claim 1, it is characterised in that:
It further include (14) PLC, the PLC (14) controls the solenoid valve (12) according to the signal of press control element and is in electric
Or power failure state.
3. a kind of ceramic press electrohydraulic control system according to claim 1, it is characterised in that:
Further include throttle valve (13), when pressure valve (8) is in right working position, the rodless cavity of variable piston (9) by pressure valve (8) and
Throttle valve (13) is connected to fuel tank (4).
4. a kind of ceramic press electrohydraulic control system according to claim 2, it is characterised in that:
The press control element is each control element in ceramic press system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821083627.8U CN208497258U (en) | 2018-07-09 | 2018-07-09 | Ceramic press electrohydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821083627.8U CN208497258U (en) | 2018-07-09 | 2018-07-09 | Ceramic press electrohydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208497258U true CN208497258U (en) | 2019-02-15 |
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ID=65283615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821083627.8U Active CN208497258U (en) | 2018-07-09 | 2018-07-09 | Ceramic press electrohydraulic control system |
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| CN (1) | CN208497258U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108818883A (en) * | 2018-07-09 | 2018-11-16 | 广东天恒液压机械有限公司 | Ceramic press electrohydraulic control method and system |
-
2018
- 2018-07-09 CN CN201821083627.8U patent/CN208497258U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108818883A (en) * | 2018-07-09 | 2018-11-16 | 广东天恒液压机械有限公司 | Ceramic press electrohydraulic control method and system |
| CN108818883B (en) * | 2018-07-09 | 2023-11-14 | 广东天恒液压机械有限公司 | Ceramic press electrohydraulic control method and system |
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