CN208236791U - The precision pressure control system of servo-pump control hydraulic press - Google Patents
The precision pressure control system of servo-pump control hydraulic press Download PDFInfo
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- CN208236791U CN208236791U CN201820707454.6U CN201820707454U CN208236791U CN 208236791 U CN208236791 U CN 208236791U CN 201820707454 U CN201820707454 U CN 201820707454U CN 208236791 U CN208236791 U CN 208236791U
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Abstract
The utility model relates to a kind of precision pressure control systems of servo-pump control hydraulic press, hydraulic press includes the middle flow and big flow servopump driven by servo motor, the export pipeline of two pumps is connected by dynamic valve seven with master cylinder epicoele oil circuit, and master cylinder epicoele oil circuit also passes through dynamic valve four and proportioning valve is connected with fuel tank；Master cylinder cavity of resorption pipeline is connected with the outlet of inserted valve nine, and the entrance of inserted valve nine passes through inserted valve five respectively and inserted valve eight is connected with fuel tank, and inserted valve five provides support force when slowing down pressurization by overflow valve, and inserted valve eight is opened when backhaul.Each working cycles of hydraulic press successively include acting as follows: accumulator automatic compensation, accumulator stop ftercompction, sliding block fast downlink, sliding block deceleration pressurization, sliding block pressure maintaining, sliding block release, sliding block backhaul and shutdown.Servo-driver adjusts the switching of control both of which using flow control and PID, and that realizes sliding block stablizes pressurization, avoids pressurization overshoot from being deformed part, and release is steady.
Description
Technical field
The utility model relates to a kind of hydraulic press, in particular to the precision pressure of a kind of servo-pump control hydraulic press controls system
System, belongs to machine tool control system technical field.
Background technique
Have in hydraulic press normal process mode and determine two kinds of control modes of journey and level pressure, determining journey state is with sliding block stop position
Come what is controlled, depending on pressure condition be then that the pressure value that generates is controlled after driving upper mold to be closed completely with lower die with sliding block
System, but it is to be controlled by position signal into operation that sliding block descends operation to switch to work fastly in level pressure state, so in level pressure mode
In be initially to be controlled using position feedback, reconvert is controlled at pressure after executing agency is with load contact, needs controller
With from position pid algorithm to the mathematical operational ability of power pid control algorithm smooth transition.
Realize that the mode that pressure accurately controls is usually threephase asynchronous driving variable displacement with constant power pump at present in the market
Pressure control is realized by overflow valve or pressure regulator again, also has part of the manufacturer to replace manual pressure regulating valve using proportional pressure control valve
Realize control, by the quick response of proportioning valve realize pressure control in addition some equipment utilization servo valves high response and
The accurate control of done with high accuracy pressure.Manual or proportional overflow is equipped with using threephase asynchronous driving variable displacement with constant power pump
Valve is also easy to produce after pressure overshoot stabilization again, and will generate the deformation that can not be restored for some parts, forms substandard products.
It also has in the market in recent years and gear pump is driven using servo motor, high using servo responds and control flexibility
To realize the accurate control of pressure.Inserting valve arrangement is generallyd use in hydraulic system applications, state of pressure keeping generallys use overflow
Mode, this is also the main reason for causing oil temperature to increase.The response (such as commutate, be open) for inserting valve system exists not in time,
It is also easy to produce over-voltage and pressure oscillation；Signal is controlled using analog quantity vulnerable to interference, especially far distance control or the control of more pump interflow
It makes particularly evident.When being controlled using servopump, existing pump intake pressure sensor has master cylinder upper cavity pressure sensor again, and sensor is adopted
Investigation failure not only is also inconvenient for vulnerable to interference with voltage signal.Under high frequency time operation, impact sound is larger when release, Yi Zao
It is loosened at fixing piece.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, a kind of servo-pump control hydraulic press is provided
Precision pressure control system, it can be achieved that sliding block stablizes pressurization, avoid overshooting, the precision of pressure control is high.
In order to solve the above technical problems, the precision pressure control system of a kind of servo-pump control hydraulic press of the utility model,
Including the master cylinder 1 being mounted on above sliding block, the cavity of resorption of master cylinder 1 is connected with master cylinder cavity of resorption oil circuit G1, on the epicoele and master cylinder of master cylinder 1
Chamber oil circuit G2 is connected, and further includes the middle flow servo pump B1 and big flow servopump B2 driven jointly by one M1 of servo motor, in
The outlet of flow servo pump B1 is connected with the entrance of one CZ1 of inserted valve, the outlet of big flow servopump B2 and two CZ2 of inserted valve
Entrance be connected, the hydraulic control mouth of two CZ2 of one CZ1 of inserted valve and inserted valve respectively with it is respective outlet be connected, one CZ1 of inserted valve and
The outlet of two CZ2 of inserted valve is connected with main pump outlet pipeline G3, and main pump outlet pipeline G3 is connected with the entrance of seven C7 of dynamic valve,
The outlet of seven C7 of dynamic valve is connected with master cylinder epicoele oil circuit G2, and the hydraulic control mouth A of seven C7 of dynamic valve passes through throttle valve and electromagnetic switch
The A mouth of seven YV7 of valve is connected, and the hydraulic control mouth B of seven C7 of dynamic valve is connected by throttle valve with the B mouth of seven YV7 of solenoid directional control valve, electromagnetism
The P mouth of seven YV7 of reversal valve is connected with control oil liquid pipe G4, and the T mouth of seven YV7 of solenoid directional control valve is connected with lower fuel tank, electromagnetic switch
Seven YV7 of valve is two four-way electromagnetic reversing valves of Y type.
Compared with the existing technology, the utility model achieves following the utility model has the advantages that when sliding block fast downlink, servo motor one
The pressure oil that M1 driving big flow servopump B2 is pumped out enters main pump outlet pipeline G3, middle flow servo pump through two CZ2 of inserted valve
The pressure oil that B1 is pumped out enters main pump outlet pipeline G3 through one CZ1 of inserted valve；When sliding block deceleration pressurization or pressure maintaining, only middle flow is watched
The pressure oil that clothes pump B1 is pumped out enters main pump outlet pipeline G3 through one CZ1 of inserted valve；When seven YV7 of solenoid directional control valve obtains electric, P
Mouth is straight-through with A mouthfuls, and B mouthfuls straight-through with T mouthfuls, and seven C7 of dynamic valve is opened rapidly, and the pressure oil in main pump outlet pipeline G3 enters master cylinder
In epicoele oil circuit G2.The utility model eliminates the check valve in conventional hydraulic in master cylinder oil supply gallery, straight by servopump
The pressure control for tapping into row master cylinder epicoele, eliminates the pressure difference between main pump outlet pipeline G3 and master cylinder epicoele oil circuit G2.Using
It opens and closes the time quickly and can guarantee that spool reliably returns the dynamic valve of seat, cooperate the high flexibility of servopump that can realize unidirectionally
Timely responding to for control, avoids pressure oscillation.
It further include that B3, small flow are pumped by the small flow servo of two M2 of servo motor driving as the improvement of the utility model
The outlet of servopump B3 is connected with the entrance of three CZ3 of inserted valve, the hydraulic control mouth of three CZ3 of inserted valve and the A of three YV3 of solenoid directional control valve
Mouth is connected, and the P mouth of three YV3 of solenoid directional control valve is connected with auxiliary feed-oil pipe G5, T mouth and the lower fuel tank phase of three YV3 of solenoid directional control valve
Even, three YV3 of solenoid directional control valve is two four-way electromagnetic reversing valves of D type, outlet and the auxiliary feed-oil pipe G5 phase of three CZ3 of inserted valve
Even, the outlet of auxiliary feed-oil pipe G5 is connected by one V1 of ball valve with control oil liquid pipe G4；Accumulation of energy is connected on auxiliary feed-oil pipe G5
Device AC and energy storage pressure sensor PN2.Before work, it is filled with the nitrogen of 6MPa into accumulator AC, and opens one V1 of ball valve；It is sliding
Before block movement, starting two M2 of servo motor, small flow servo pump B3 pumps out pressure oil, and three YV3 of solenoid directional control valve is obtained electric at this time,
A mouthfuls communicate with T mouthfuls, and P mouthfuls communicate with B mouthfuls, and three CZ3 of inserted valve is opened, and auxiliary feed-oil pipe G5 builds pressure and carries out to accumulator AC
Ftercompction, when the supercharging pressure that energy storage pressure sensor PN2 detects accumulator AC reaches 16Mpa, three YV3 of solenoid directional control valve
Power loss closes three CZ3 of inserted valve, while small flow servo pump B3 stops to accumulator AC ftercompction, by auxiliary feed-oil pipe G5 and storage
Energy device AC provides pressure oil to control oil liquid pipe G4.Since the fuel consumption of control oil liquid is smaller, the utility model is using small
Flow servo pumps B3 to accumulator AC ftercompction, then provides control oil liquid using the energy-storage function of accumulator AC for system, can be with
The starting pumped greatly is reduced, it is energy saving.
It is further improved as the utility model, the outlet of middle flow servo pump B1 is equipped with pump intake pressure sensor
PN1, and be connected with the entrance of one C1 of dynamic valve, the outlet of one C1 of dynamic valve is connected with lower fuel tank, the hydraulic control mouth A of one C1 of dynamic valve
It is connected by throttle valve with the A mouth of one YV1 of solenoid directional control valve, the hydraulic control mouth B of one C1 of dynamic valve passes through throttle valve and electromagnetic switch
The B mouth of one YV1 of valve is connected, and the P mouth of one YV1 of solenoid directional control valve is connected with control oil liquid pipe G4, the T mouth of one YV1 of solenoid directional control valve
It is connected with lower fuel tank；The export pipeline of big flow servopump B2 is connected with the entrance of two C2 of dynamic valve, the outlet of two C2 of dynamic valve
It is connected with lower fuel tank, the hydraulic control mouth A of two C2 of dynamic valve is connected by throttle valve with the A mouth of two YV2 of solenoid directional control valve, dynamic valve two
The hydraulic control mouth B of C2 is connected by throttle valve with the B mouth of two YV2 of solenoid directional control valve, the P mouth and control oil of two YV2 of solenoid directional control valve
Liquid pipe G4 is connected, and the T mouth of two YV2 of solenoid directional control valve is connected with lower fuel tank；Two YV2 of one YV1 of solenoid directional control valve and solenoid directional control valve
For two four-way electromagnetic reversing valves of D type.When sliding block fast downlink or backhaul, one YV1 of solenoid directional control valve obtain it is electric, P mouthfuls with B mouthfuls of phases
Logical, A mouthfuls communicate with T mouthfuls, and one C1 of dynamic valve is closed rapidly；Two YV2 of solenoid directional control valve is obtained electric simultaneously, and P mouthfuls communicate with B mouthfuls, A
Mouth is communicated with T mouthfuls, and two C2 of dynamic valve is closed rapidly, and middle flow servo pump B1 and big flow servopump B2 is worked at the same time, and makes main pump
Export pipeline G3 builds rapidly pressure.When sliding block slows down pressurization or pressure maintaining, two YV2 power loss of solenoid directional control valve keeps two C2 of dynamic valve rapid
It opens, big flow servopump B2 stops working, and one YV1 of solenoid directional control valve is maintained to obtain electricity condition, mono- by middle flow servo pump B1
Solely to main pump outlet pipeline G3 fuel feeding.When sliding block release, one YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve power loss simultaneously,
Middle flow servo pump B1 and big flow servopump B2 does not work.Pump intake pressure sensor PN1 is into control system Real-time Feedback
Flow servo pumps the pressure of the outlet B1, and in conjunction with the height response of one M1 of servo motor, flow servo pumps the flow output of B1 in adjustment,
When main pump outlet pipeline G3 does not build pressure, oil pressure is established with flow control, is then used after main pump outlet pipeline G3 has built pressure
PID adjusts the oil pressure of control main pump outlet pipeline G3, it can be achieved that stablizing the precision that pressurization avoids overshooting and guaranteeing pressure control, keeps away
Exempt from that part is made to generate the deformation that can not be restored.
It is further improved as the utility model, the export pipeline of middle flow servo pump B1 is by one F1 of pressure regulator valve under
Fuel tank is connected, and the export pipeline of big flow servopump B2 is connected by two F2 of pressure regulator valve with lower fuel tank, and auxiliary feed-oil pipe G5 also divides
Not Tong Guo three F3 of pressure regulator valve and two V2 of ball valve be connected with lower fuel tank.When the outlet pressure of flow servo pump B1 reaches 25MPa in the middle,
One F1 of pressure regulator valve opens release, pumps B1 with flow servo in protection.When the outlet pressure of big flow servopump B2 reaches 10MPa
When, two F2 of pressure regulator valve opens release, to protect big flow servopump B2.When the pressure of auxiliary feed-oil pipe G5 reaches 16MPa, adjust
Three F3 of pressure valve opens release, to protect the safety of system.
It is further improved as the utility model, the outlet and the entrance phase of eight CZ8 of inserted valve of main pump outlet pipeline G3
Even, the outlet of eight CZ8 of inserted valve is connected with the entrance of nine CZ9 of inserted valve, the outlet of nine CZ9 of inserted valve and master cylinder cavity of resorption oil circuit G1
It is connected；The hydraulic control mouth of eight CZ8 of inserted valve is connected with the centre exit of shuttle valve S1, and the right entry of shuttle valve S1 is with eight CZ8's of inserted valve
Outlet is connected, and the left entry of shuttle valve S1 is connected with the A mouth of eight YV8 of solenoid directional control valve, the P mouth of eight YV8 of solenoid directional control valve and inserting
The entrance of eight CZ8 of valve is connected, and the T mouth of eight YV8 of solenoid directional control valve is connected with lower fuel tank, and eight YV8 of solenoid directional control valve is two four, D type
Electric change valve；The hydraulic control mouth of nine CZ9 of inserted valve is connected with the A mouth of nine YV9 of solenoid directional control valve, the P of nine YV9 of solenoid directional control valve
Mouth is connected with the outlet of nine CZ9 of inserted valve, and the T mouth of nine YV9 of solenoid directional control valve is connected with lower fuel tank, and nine YV9 of solenoid directional control valve is
Two-bit triplet solenoid directional control valve；Master cylinder cavity of resorption oil circuit G1 also passes through four F4 of pressure regulator valve and is connected with lower fuel tank.Sliding block fast downlink subtracts
When speed pressurization or pressure maintaining, nine YV9 of solenoid directional control valve obtains electric, A mouthfuls and T mouthfuls conductings, nine CZ9 of inserted valve opening, master cylinder cavity of resorption oil circuit
G1 oil extraction keeps branch bulging, and eight YV8 of solenoid directional control valve is in power failure state at this time, and P mouthfuls are straight-through with A mouthfuls, and B mouthfuls are straight-through with T mouthfuls,
Shuttle valve S1 ensures that the hydraulic control mouth of eight CZ8 of inserted valve builds pressure, and eight CZ8 of inserted valve is in reliable closed state.When sliding block release, electricity
Nine YV9 power loss of magnetic reversal valve, nine CZ9 of inserted valve are closed.When sliding block backhaul, eight YV8 of solenoid directional control valve obtains electric, and A mouthfuls are led with T mouthfuls
Logical, the hydraulic control mouth pressure of eight CZ8 of inserted valve is lower than inlet pressure, opens eight CZ8 of inserted valve, while nine YV9 of solenoid directional control valve
Simultaneously must be electric, open nine CZ9 of inserted valve, the pressure oil in main pump outlet pipeline G3 enters master cylinder cavity of resorption oil circuit G1, passes through master
The piston of cylinder 1 retracts band movable slider uplink.
It further being improved as the utility model, the entrance of nine CZ9 of inserted valve is connected with the entrance of five CZ5 of inserted valve,
The outlet of five CZ5 of inserted valve is connected with lower fuel tank, the A mouth phase of the hydraulic control mouth and solenoid directional control valve five YV5, YV6 of five CZ5 of inserted valve
Even, B mouth of solenoid directional control valve five and T mouthfuls are connected with lower fuel tank respectively, the P mouth of solenoid directional control valve five pass through five F5 of pressure regulator valve and under
Fuel tank is connected, and the A mouth of solenoid directional control valve five is connected by six F6 of pressure regulator valve with lower fuel tank, and solenoid directional control valve is fifth is that Median Function is
O-shaped three-position four-way electromagnetic directional valve.When sliding block fast downlink, the left coil YV6 of solenoid directional control valve five obtains electric in left work
The hydraulic control mouth of position, five CZ5 of inserted valve leads to fuel tank, opens five CZ5 of inserted valve, makes master cylinder cavity of resorption oil circuit G1 and the direct phase of fuel tank
It is logical, realize the cavity of resorption of master cylinder 1 without support force.When sliding block slows down pressurization or pressure maintaining, the right coil YV5 of solenoid directional control valve five obtains electric
In right working position, the hydraulic control mouth of five CZ5 of inserted valve is controlled by five F5 of pressure regulator valve, by five F5 of pressure regulator valve by the back pressure of 1 cavity of resorption of master cylinder
Control is in 5MPa~8MPa.When sliding block release or backhaul, five power loss of solenoid directional control valve is in middle position, the liquid of five CZ5 of inserted valve
Control mouth is controlled by six F6 of pressure regulator valve, and when reaching pressure upper limit 25MPa, six F6 of pressure regulator valve is opened.
It is further improved as the utility model, master cylinder epicoele oil circuit G2 is connected with the entrance of four C4 of dynamic valve, dynamic
The outlet of four C4 of valve is connected with top tank, and the hydraulic control mouth A of four C4 of dynamic valve passes through the A mouth of throttle valve and four YV4 of solenoid directional control valve
It is connected, the hydraulic control mouth B of four C4 of dynamic valve is connected by throttle valve with the B mouth of four YV4 of solenoid directional control valve, four YV4 of solenoid directional control valve
P mouth with control oil liquid pipe G4 be connected, the T mouth of four YV4 of solenoid directional control valve is connected with top tank, four YV4 of solenoid directional control valve be D type
Two four-way electromagnetic reversing valves；Master cylinder epicoele oil circuit G2 is also connected with the entrance of proportioning valve YAA, the outlet of proportioning valve YAA and oil
Case is connected.When sliding block fast downlink or backhaul, proportioning valve YAA power loss is closed, four YV4 power loss of solenoid directional control valve, and P mouthfuls and A mouthfuls
Straight-through, B mouthfuls straight-through with T mouthfuls, opens four C4 of dynamic valve rapidly, the epicoele of master cylinder 1 is communicated with top tank；When under sliding block is fast, on
Fuel tank can be rapidly to master cylinder epicoele repairing；When sliding block backhaul, the oil liquid of master cylinder epicoele can be quickly returning to top tank.Work as sliding block
Slow down pressurization or when pressure maintaining, proportioning valve YAA power loss is closed, four YV4 of solenoid directional control valve obtain it is electric close four C4 of dynamic valve rapidly, it is main
The upper cavity pressure of cylinder 1 is directly controlled by middle flow servo pump B1.At the end of sliding block pressure maintaining, proportioning valve YAA first it is electric carry out it is pre-
It is discharged to certain pressure, then four YV4 power loss of solenoid directional control valve opens four C4 of dynamic valve rapidly, the epicoele and top tank of master cylinder 1
Straight-through to realize sliding block release, controlling proportioning valve YAA by electric signal in this process not only can realize fast pressure relief but also controllable opening
Linear opening accomplishes the smooth transition of sliding block pressure maintaining to release without impact to realize.
It is further improved as the utility model, one M1 of servo motor is controlled by servo-driver SDR, three-phase alternating current
Source is connect by circuit breaker Q F1 and filter EM1 with the power end of servo-driver SDR, and one tail portion M1 of servo motor is mounted on
Encoder PG be connected on the port CN1 of servo-driver SDR, pump intake pressure sensor PN1 be current feedback pressure sensing
It device and is connected on the port CN2 of servo-driver SDR, the A01 foot of the port CN3 of servo-driver SDR and PLC controller
The port AIO+ of SM231 module is connected, the AGND foot of the port CN3 of servo-driver SDR and the SM231 module of PLC controller
The port AIO- be connected；The CAN communication interface of servo-driver SDR is connected with the CANopen module of PLC controller；Servo makes
Energy button SB1 is connected between the port enabling signal input terminal S-ON and V1+ of servo-driver SDR, alarm reset button SB2
It is connected between the port reset signal input terminal ALM-RST and V1+ of servo-driver SDR；The coil of one KA1 of relay connects
Between the alarm signal end ALM and the port V1- of servo-driver SDR, the normally open contact of one KA1 of relay is connected on PLC control
Between 0.0 port and the port V1+ of the SM223 module of device processed；The coil of two KA2 of relay is connected to servo-driver SDR's
Between the port Dual-pump flow-converging signal input part TGON and V1-, the normally open contact of two KA2 of relay is connected on PLC controller
Between 0.1 port and the port V1+ of SM223 module；The CPU of PLC controller passes through ethernet communication line and touch screen PM1 phase
Even, the port V1+ connects+24VDC, the port V1- ground connection；Servo-driver SDR uses ProNet-2BDIB Ai Sidun servo-driver,
PLC controller uses Siemens 6ES7215-1BG40-0XB0 type.Servo-driver SDR obtains the number that encoder PG is sent
Signal, the accurate operating for controlling one M1 of servo motor；Servo-driver SDR receives the pump of pump intake pressure sensor PN1 transmission
After mouth pressure signal, it is converted into the analog signals of 0-10v pressure control and PLC controller is sent to by the port CN3
SM223 module, PLC controller carries out logical to the CAN of servo-driver SDR by CANopen module after pressure signal comparison
Communication interface issues control signal, and servo-driver SDR selection adjusts control oil pressure using flow control either PID；Change and passes
The flow used, the pressure of uniting control given 0-10V analog signal as number bus control, are led to using CANOpen agreement by CAN
Communication interface can solve analog signal and be transmitted at a distance vulnerable to interference in interference than being communicated in stronger industrial environment
Problem；It can be achieved to arrange servo controller close to servo motor, shorten motor cable, while in servo operation information and alarm
Appearance can be shown by after bus transfer in the picture of touch screen.When sliding block fast downlink, main pump outlet pipeline G3 does not build pressure,
The operating of servo-driver SDR one M1 of flow control servo motor, big flow servopump B2 and middle flow servo pump B1 are common
Fuel feeding.When sliding block slows down pressurization or pressure maintaining, main pump outlet pipeline G3 has built pressure and has individually been supplied by middle flow servo pump B1
Oil, the pressure of the outlet flow servo pump B1 into servo-driver SDR Real-time Feedback pump intake pressure sensor PN1, in conjunction with servo
The high of one M1 of motor responds, and the flow output of flow servo pump B1, servo-driver SDR are adjusted using PID and controlled master in adjustment
The oil pressure of pump discharge pipeline G3 avoids overshooting and guaranteeing the precision that pressure controls, it can be achieved that stablizing pressurization, avoids generating part
The deformation that can not be restored.Pump intake pressure sensor PN1 uses current feedback pressure sensor, can solve electrical noise interference, be convenient for
Carry out diagnosis when broken string or power supply access failure.After the enabled button SB1 of servo is pressed, servo-driver SDR starting, when main pump goes out
When the pressure of mouth pipeline G3 is lower than 10MPa, the coil of two KA2 of relay obtains electric, the normally open contact closure of two KA2 of relay, PLC
Controller receives Dual-pump flow-converging signal, so that two YV2 of solenoid directional control valve obtains electric, two C2 of dynamic valve is closed rapidly, and big flow is watched
Clothes pump B2 and middle flow servo pump B1 fuel feeding simultaneously.When servo-driver SDR detects the failures such as overcurrent, relay one
The coil of KA1 obtain it is electric, normally open contact closure, PLC controller receives alarm signal, by ethernet communication line in touch screen
PM1 prompt, presses alarm reset button SB2, then ann reset.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments, and attached drawing only provides ginseng
It examines and illustrates to use, it is non-to limit the utility model.
Fig. 1 is the hydraulic schematic diagram of the precision pressure control system of the utility model servo-pump control hydraulic press.
Fig. 2 is the electrical schematic diagram of the precision pressure control system of the utility model servo-pump control hydraulic press.
In figure: 1. master cylinders；B1. middle flow servo pump；B2. big flow servopump；B3. small flow servo pump；M1. servo electricity
Machine one；M2. servo motor two；AC. accumulator；PN1. pump intake pressure sensor；PN2. energy storage pressure sensor；G1. master cylinder
Cavity of resorption oil circuit；G2. master cylinder epicoele oil circuit；G3. main pump outlet pipeline；G4. control oil pipe；G5. auxiliary feed-oil pipe；YV1. electromagnetism changes
To valve one；YV2. solenoid directional control valve two；YV3. solenoid directional control valve three；YV4. solenoid directional control valve four；YV5, YV6. solenoid directional control valve
Five；YV7. solenoid directional control valve seven；YV8. solenoid directional control valve eight；YV9. solenoid directional control valve nine；YAA. proportioning valve；C1. dynamic valve one；
C2. dynamic valve two；C4. dynamic valve four；C7. dynamic valve seven；CZ1. inserted valve one；CZ2. inserted valve two；CZ3. inserted valve three；
CZ5. inserted valve five；CZ8. inserted valve eight；CZ9. inserted valve nine；S1. shuttle valve；F1. pressure regulator valve one；F2. pressure regulator valve two；F3. it adjusts
Pressure valve three；F4. pressure regulator valve four；F5. pressure regulator valve five；F6. pressure regulator valve six；V1. ball valve one；V2. ball valve two；SDR. servo-drive
Device；QF1. breaker；EM1. filter；PG. encoder；SB1. servo enables button；SB2. alarm reset button；S-ON. it opens
Dynamic signal input part；ALM. alarm signal end；ALM-RST. reset signal input terminal；TGON. Dual-pump flow-converging signal input part；
PM1. touch screen；R. braking resistor.
Specific embodiment
As shown in Figure 1, the precision pressure control system of the utility model servo-pump control hydraulic press, including be mounted on sliding block
The master cylinder 1 of side, the cavity of resorption of master cylinder 1 are connected with master cylinder cavity of resorption oil circuit G1, and the epicoele of master cylinder 1 is connected with master cylinder epicoele oil circuit G2, also
Including the middle flow servo pump B1 and big flow servopump B2 driven jointly by one M1 of servo motor, middle flow servo pump B1's goes out
Mouth is connected with the entrance of one CZ1 of inserted valve, and the outlet of big flow servopump B2 is connected with the entrance of two CZ2 of inserted valve, inserted valve
The hydraulic control mouth of two CZ2 of one CZ1 and inserted valve is connected with respective outlet respectively, the outlet of two CZ2 of one CZ1 of inserted valve and inserted valve
It is connected with main pump outlet pipeline G3, main pump outlet pipeline G3 is connected with the entrance of seven C7 of dynamic valve, the outlet of seven C7 of dynamic valve
It is connected with master cylinder epicoele oil circuit G2, the hydraulic control mouth A of seven C7 of dynamic valve is connected by throttle valve with the A mouth of seven YV7 of solenoid directional control valve,
The hydraulic control mouth B of seven C7 of dynamic valve is connected by throttle valve with the B mouth of seven YV7 of solenoid directional control valve, the P mouth of seven YV7 of solenoid directional control valve
It is connected with control oil liquid pipe G4, the T mouth of seven YV7 of solenoid directional control valve is connected with lower fuel tank, and seven YV7 of solenoid directional control valve is two, Y type
Four-way electromagnetic reversing valve.
When sliding block fast downlink, the pressure oil that one M1 of servo motor driving big flow servopump B2 is pumped out is through inserted valve two
CZ2 enters main pump outlet pipeline G3, and the pressure oil that middle flow servo pump B1 is pumped out enters main pump outlet pipe through one CZ1 of inserted valve
Road G3；When sliding block deceleration pressurization or pressure maintaining, the pressure oil that only middle flow servo pump B1 is pumped out enters main pump through one CZ1 of inserted valve and goes out
Mouth pipeline G3；When seven YV7 of solenoid directional control valve obtains electric, P mouthfuls straight-through with A mouthfuls, and B mouthfuls straight-through with T mouthfuls, and seven C7 of dynamic valve is beaten rapidly
It opens, the pressure oil in main pump outlet pipeline G3 enters in master cylinder epicoele oil circuit G2.The utility model eliminates conventional hydraulic
Check valve in middle master cylinder oil supply gallery is directly carried out the pressure control of master cylinder epicoele by servopump, eliminates main pump outlet pipeline
Pressure difference between G3 and master cylinder epicoele oil circuit G2.Quickly and it can guarantee that spool reliably returns seat using the time is opened and closed
Dynamic valve, cooperate the high flexibility of servopump can realize it is unidirectionally controlled timely respond to, avoid pressure oscillation.
Hydraulic system further includes that B3 is pumped by the small flow servo of two M2 of servo motor driving, the outlet of small flow servo pump B3
It is connected with the entrance of three CZ3 of inserted valve, the hydraulic control mouth of three CZ3 of inserted valve is connected with the A mouth of three YV3 of solenoid directional control valve, and electromagnetism changes
It is connected to the P mouth of three YV3 of valve with auxiliary feed-oil pipe G5, the T mouth of three YV3 of solenoid directional control valve is connected with lower fuel tank, solenoid directional control valve
Three YV3 are two four-way electromagnetic reversing valves of D type, and the outlet of three CZ3 of inserted valve is connected with auxiliary feed-oil pipe G5, auxiliary feed-oil pipe G5
Outlet by one V1 of ball valve with control oil liquid pipe G4 be connected；Accumulator AC and energy storage pressure are connected on auxiliary feed-oil pipe G5
Sensor PN2.
Before work, it is filled with the nitrogen of 6MPa into accumulator AC, and opens one V1 of ball valve；Before sliding block movement, start servo
Motor two M2, small flow servo pump B3 pump out pressure oil, and three YV3 of solenoid directional control valve is obtained electric at this time, and A mouthfuls communicate with T mouthfuls, and P mouthfuls
It is communicated with B mouthfuls, three CZ3 of inserted valve is opened, auxiliary feed-oil pipe G5 builds pressure and carries out ftercompction to accumulator AC, works as energy storage pressure
When the supercharging pressure that sensor PN2 detects accumulator AC reaches 16Mpa, three YV3 power loss of solenoid directional control valve makes three CZ3 of inserted valve
It closes, while small flow servo pump B3 stops to accumulator AC ftercompction, from auxiliary feed-oil pipe G5 and accumulator AC to control oil liquid
Pipe G4 provides pressure oil.Since the fuel consumption of control oil liquid is smaller, the utility model pumps B3 to storage using small flow servo
Energy device AC ftercompction, then provides control oil liquid using the energy-storage function of accumulator AC for system, it is possible to reduce the starting pumped greatly, section
The about energy.
The outlet of middle flow servo pump B1 is equipped with pump intake pressure sensor PN1, and is connected with the entrance of one C1 of dynamic valve,
The outlet of one C1 of dynamic valve is connected with lower fuel tank, and the hydraulic control mouth A of one C1 of dynamic valve is by throttle valve with one YV1's of solenoid directional control valve
A mouthfuls are connected, and the hydraulic control mouth B of one C1 of dynamic valve is connected by throttle valve with the B mouth of one YV1 of solenoid directional control valve, solenoid directional control valve one
The P mouth of YV1 is connected with control oil liquid pipe G4, and the T mouth of one YV1 of solenoid directional control valve is connected with lower fuel tank.
The export pipeline of big flow servopump B2 is connected with the entrance of two C2 of dynamic valve, the outlet of two C2 of dynamic valve and lower oil
Case is connected, and the hydraulic control mouth A of two C2 of dynamic valve is connected by throttle valve with the A mouth of two YV2 of solenoid directional control valve, the liquid of two C2 of dynamic valve
Control mouth B is connected by throttle valve with the B mouth of two YV2 of solenoid directional control valve, the P mouth and control oil liquid pipe G4 of two YV2 of solenoid directional control valve
It is connected, the T mouth of two YV2 of solenoid directional control valve is connected with lower fuel tank；One YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve is D type two
Position four-way electromagnetic reversing valve.
When sliding block fast downlink or backhaul, one YV1 of solenoid directional control valve obtains electric, and P mouthfuls communicate with B mouthfuls, and A mouthfuls communicate with T mouthfuls,
One C1 of dynamic valve is closed rapidly；Two YV2 of solenoid directional control valve is obtained electric simultaneously, and P mouthfuls communicate with B mouthfuls, and A mouthfuls communicate with T mouthfuls, dynamic
Two C2 of valve is closed rapidly, and middle flow servo pump B1 and big flow servopump B2 is worked at the same time, and builds main pump outlet pipeline G3 rapidly
Pressure.
When sliding block slows down pressurization or pressure maintaining, two YV2 power loss of solenoid directional control valve opens two C2 of dynamic valve rapidly, big flow
Servopump B2 stops working, and one YV1 of solenoid directional control valve is maintained to obtain electricity condition, from middle flow servo pump B1 individually to main pump outlet
Pipeline G3 fuel feeding.
When sliding block release, power loss, middle flow servo pump B1 simultaneously by one YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve
It does not work with big flow servopump B2.
The export pipeline of middle flow servo pump B1 is connected by one F1 of pressure regulator valve with lower fuel tank, big flow servopump B2's
Export pipeline is connected by two F2 of pressure regulator valve with lower fuel tank, and auxiliary feed-oil pipe G5 also passes through two V2 of three F3 of pressure regulator valve and ball valve respectively
It is connected with lower fuel tank.When the outlet pressure of flow servo pump B1 reaches 25MPa in the middle, one F1 of pressure regulator valve opens release, with protection
Middle flow servo pumps B1.When the outlet pressure of big flow servopump B2 reaches 10MPa, two F2 of pressure regulator valve opens release, to protect
Protect big flow servopump B2.When the pressure of auxiliary feed-oil pipe G5 reaches 16MPa, three F3 of pressure regulator valve opens release, is to protect
The safety of system.
The outlet of main pump outlet pipeline G3 is connected with the entrance of eight CZ8 of inserted valve, the outlet of eight CZ8 of inserted valve and inserted valve
The entrance of nine CZ9 is connected, and the outlet of nine CZ9 of inserted valve is connected with master cylinder cavity of resorption oil circuit G1；The hydraulic control mouth and shuttle of eight CZ8 of inserted valve
The centre exit of valve S1 is connected, and the right entry of shuttle valve S1 is connected with the outlet of eight CZ8 of inserted valve, the left entry and electromagnetism of shuttle valve S1
The A mouth of eight YV8 of reversal valve is connected, and the P mouth of eight YV8 of solenoid directional control valve is connected with the entrance of eight CZ8 of inserted valve, solenoid directional control valve eight
The T mouth of YV8 is connected with lower fuel tank, and eight YV8 of solenoid directional control valve is two four-way electromagnetic reversing valves of D type；The hydraulic control of nine CZ9 of inserted valve
Mouth is connected with the A mouth of nine YV9 of solenoid directional control valve, and the P mouth of nine YV9 of solenoid directional control valve is connected with the outlet of nine CZ9 of inserted valve, electromagnetism
The T mouth of nine YV9 of reversal valve is connected with lower fuel tank, and nine YV9 of solenoid directional control valve is two-bit triplet solenoid directional control valve；Master cylinder cavity of resorption oil circuit
G1 also passes through four F4 of pressure regulator valve and is connected with lower fuel tank.
When sliding block fast downlink, deceleration pressurization or pressure maintaining, nine YV9 of solenoid directional control valve obtains electric, A mouthfuls and T mouthfuls conductings, inserted valve
Nine CZ9 are opened, and the oil circuit G1 oil extraction of master cylinder cavity of resorption or keep branch bulging, and eight YV8 of solenoid directional control valve is in power failure state at this time, and P mouthfuls
Straight-through with A mouthfuls, B mouthfuls straight-through with T mouthfuls, and shuttle valve S1 ensures that the hydraulic control mouth of eight CZ8 of inserted valve builds pressure, and eight CZ8 of inserted valve is in reliable
Closed state.
When sliding block release, nine YV9 power loss of solenoid directional control valve, nine CZ9 of inserted valve is closed.
When sliding block backhaul, eight YV8 of solenoid directional control valve obtains electric, A mouthfuls and T mouthfuls conductings, the hydraulic control mouth pressure of eight CZ8 of inserted valve
Lower than inlet pressure, eight CZ8 of inserted valve is opened, while nine YV9 of solenoid directional control valve simultaneously must be electric, opens nine CZ9 of inserted valve,
Pressure oil in main pump outlet pipeline G3 enters master cylinder cavity of resorption oil circuit G1, retracts band movable slider uplink by the piston of master cylinder 1.
The entrance of nine CZ9 of inserted valve is connected with the entrance of five CZ5 of inserted valve, the outlet of five CZ5 of inserted valve and lower fuel tank phase
Even, the hydraulic control mouth of five CZ5 of inserted valve is connected with the A mouth of solenoid directional control valve five YV5, YV6, and the B mouth of solenoid directional control valve five divides with T mouthfuls
It is not connected with lower fuel tank, the P mouth of solenoid directional control valve five is connected by five F5 of pressure regulator valve with lower fuel tank, the A mouth of solenoid directional control valve five
It is connected by six F6 of pressure regulator valve with lower fuel tank, solenoid directional control valve is fifth is that Median Function is O-shaped three-position four-way electromagnetic directional valve.
When sliding block fast downlink, the left coil YV6 of solenoid directional control valve five obtain it is electric in left station, five CZ5's of inserted valve
Hydraulic control mouth leads to fuel tank, opens five CZ5 of inserted valve, communicates master cylinder cavity of resorption oil circuit G1 directly with fuel tank, realizes the cavity of resorption of master cylinder 1
Without support force.
When sliding block slows down pressurization or pressure maintaining, the right coil YV5 of solenoid directional control valve five obtains electric in right working position, inserted valve five
The hydraulic control mouth of CZ5 is controlled by five F5 of pressure regulator valve, is controlled the back pressure of 1 cavity of resorption of master cylinder in 5MPa~8MPa by five F5 of pressure regulator valve.
When sliding block release or backhaul, five power loss of solenoid directional control valve is in middle position, and the hydraulic control mouth of five CZ5 of inserted valve is controlled by
Six F6 of pressure regulator valve, when reaching pressure upper limit 25MPa, six F6 of pressure regulator valve is opened.
Master cylinder epicoele oil circuit G2 is connected with the entrance of four C4 of dynamic valve, and the outlet of four C4 of dynamic valve is connected with top tank, moves
The hydraulic control mouth A of four C4 of state valve is connected by throttle valve with the A mouth of four YV4 of solenoid directional control valve, and the hydraulic control mouth B of four C4 of dynamic valve passes through
Throttle valve is connected with the B mouth of four YV4 of solenoid directional control valve, and the P mouth of four YV4 of solenoid directional control valve is connected with control oil liquid pipe G4, electromagnetism
The T mouth of four YV4 of reversal valve is connected with top tank, and four YV4 of solenoid directional control valve is two four-way electromagnetic reversing valves of D type；Master cylinder epicoele
Oil circuit G2 is also connected with the entrance of proportioning valve YAA, and the outlet of proportioning valve YAA is connected with fuel tank.
When sliding block fast downlink or backhaul, proportioning valve YAA power loss is closed, four YV4 power loss of solenoid directional control valve, and P mouthfuls and A mouthfuls
Straight-through, B mouthfuls straight-through with T mouthfuls, opens four C4 of dynamic valve rapidly, the epicoele of master cylinder 1 is communicated with top tank；When under sliding block is fast, on
Fuel tank can be rapidly to master cylinder epicoele repairing；When sliding block backhaul, the oil liquid of master cylinder epicoele can be quickly returning to top tank.
When sliding block slows down pressurization or when pressure maintaining, proportioning valve YAA power loss is closed, and four YV4 of solenoid directional control valve, which is obtained, electric makes dynamic valve
Four C4 are closed rapidly, and the upper cavity pressure of master cylinder 1 is directly controlled by middle flow servo pump B1.
At the end of sliding block pressure maintaining, proportioning valve YAA first electric progress is discharged to certain pressure in advance, then solenoid directional control valve four
YV4 power loss opens four C4 of dynamic valve rapidly, and the epicoele and top tank of master cylinder 1 are straight-through to realize sliding block release, passes through in this process
Electric signal control proportioning valve YAA can not only realize fast pressure relief but also the linear opening of controllable opening, accomplish to realize without impact
Sliding block pressure maintaining to release smooth transition.
As shown in Fig. 2, one M1 of servo motor is controlled by servo-driver SDR, three-phase alternating-current supply by circuit breaker Q F1 and
Filter EM1 is connect with the power end of servo-driver SDR, and the encoder PG for being mounted on one tail portion M1 of servo motor, which is connected to, to be watched
It takes on the port CN1 of driver SDR, pump intake pressure sensor PN1 is current feedback pressure sensor and is connected to servo-drive
On the port CN2 of device SDR, braking resistor R is connected on the braking resistor connection terminal of servo-driver SDR, servo-driver
The port AIO+ of the SM231 module of the A01 foot and PLC controller of the port CN3 of SDR is connected, the end CN3 of servo-driver SDR
The AGND foot of mouth is connected with the port AIO- of the SM231 module of PLC controller；The CAN communication interface of servo-driver SDR with
The CANopen module of PLC controller is connected；Servo enables the enabling signal input terminal that button SB1 is connected to servo-driver SDR
Between the port S-ON and V1+, alarm reset button SB2 be connected to the reset signal input terminal ALM-RST of servo-driver SDR with
Between the port V1+；The coil of one KA1 of relay is connected between the alarm signal end ALM of servo-driver SDR and the port V1-,
The normally open contact of one KA1 of relay is connected between 0.0 port and the port V1+ of the SM223 module of PLC controller；Relay
The coil of two KA2 is connected between the port Dual-pump flow-converging signal input part TGON and V1- of servo-driver SDR, relay two
The normally open contact of KA2 is connected between 0.1 port and the port V1+ of the SM223 module of PLC controller；The CPU of PLC controller
It is connected by ethernet communication line with touch screen PM1, the port V1+ connects+24VDC, the port V1- ground connection；Servo-driver SDR is used
ProNet-2BDIB Ai Sidun servo-driver, PLC controller use Siemens 6ES7215-1BG40-0XB0 type.
Servo-driver SDR obtains the digital signal that encoder PG is sent, the accurate operating for controlling one M1 of servo motor；
After servo-driver SDR receives the pump intake pressure signal of pump intake pressure sensor PN1 transmission, it is converted into 0-10v pressure
The analog signals of control and the SM223 module that PLC controller is sent to by the port CN3, PLC controller carry out pressure signal
Control signal, servo-driver SDR choosing are issued to the CAN communication interface of servo-driver SDR by CANopen module after comparison
It selects and control oil pressure is adjusted using flow control either PID；Change conventionally employed flow, pressure controls given 0-10V simulation
Signal is number bus control, can be in interference than stronger industrial environment by CAN communication interface using CANOpen agreement
In communicated, solve the problems, such as analog signal transmit at a distance vulnerable to interference；It can be achieved servo controller close to servo electricity
Machine arrangement, shortens motor cable, while servo operation information and alarm content can pass through the picture after bus transfer in touch screen
Middle display.
When sliding block fast downlink, main pump outlet pipeline G3 does not build pressure, servo-driver SDR flow control servo motor
The operating of one M1, big flow servopump B2 and middle flow servo pump the common fuel feeding of B1.
When sliding block slows down pressurization or when pressure maintaining, main pump outlet pipeline G3 has built pressure and independent by middle flow servo pump B1
Fuel feeding, the pressure of the outlet flow servo pump B1 into servo-driver SDR Real-time Feedback pump intake pressure sensor PN1, in conjunction with watching
The high response of one M1 of motor is taken, the flow output of flow servo pump B1, servo-driver SDR adjust control using PID in adjustment
The oil pressure of main pump outlet pipeline G3 avoids overshooting and guaranteeing the precision that pressure controls, it can be achieved that stablizing pressurization, avoids producing part
The deformation that life can not restore.Pump intake pressure sensor PN1 uses current feedback pressure sensor, can solve electrical noise interference, just
Diagnosis when carrying out broken string or power supply access failure.
After the enabled button SB1 of servo is pressed, servo-driver SDR starting, when the pressure of main pump outlet pipeline G3 is lower than
When 10MPa, the coil of two KA2 of relay obtains electric, and the normally open contact of two KA2 of relay closure, PLC controller receives double pump conjunction
Signal is flowed, so that two YV2 of solenoid directional control valve obtains electric, two C2 of dynamic valve is closed rapidly, and big flow servopump B2 is watched with middle flow
Clothes pump B1 while fuel feeding.
When servo-driver SDR detects the failures such as overcurrent, the coil of one KA1 of relay obtains electric, normally open contact
Closure, PLC controller receive alarm signal, are prompted by ethernet communication line in touch screen PM1, press alarm reset button
SB2, then ann reset.
The hydraulic press of the utility model, each working cycles successively include acting as follows: (1) accumulator automatic compensation: first to
It is filled with the nitrogen of 6MPa in accumulator AC, before sliding block movement, starts two M2 of servo motor and to obtain three YV3 of solenoid directional control valve electric,
Small flow servo pump B3 pumps out pressure oil and carries out ftercompction to accumulator AC；
(2) accumulator stops ftercompction: when the supercharging pressure of accumulator AC reaches 16Mpa, three YV3 power loss of solenoid directional control valve makes
Three CZ3 of inserted valve is closed, while small flow servo pump B3 stops；
(3) sliding block fast downlink: nine YV9 of solenoid directional control valve obtain it is electric open nine CZ9 of inserted valve, solenoid directional control valve five switches
Open five CZ5 of inserted valve to left station, the oil liquid of master cylinder cavity of resorption leads directly to oil return box；One YV1 of solenoid directional control valve and electromagnetic switch
Two YV2 of valve simultaneously must be electric, and big flow servopump B2 and middle flow servo pump the common fuel feeding of B1, and seven YV7 of solenoid directional control valve obtains electric make
Seven C7 of dynamic valve is opened rapidly, and oil liquid enters master cylinder epicoele, while four YV4 power loss of solenoid directional control valve beats four C4 of dynamic valve rapidly
Open, with sliding block it is fast under, the oil liquid of top tank fills into rapidly master cylinder epicoele；
(4) sliding block, which slows down, pressurizes: two YV2 power loss of solenoid directional control valve opens two C2 of dynamic valve rapidly, solenoid directional control valve one
YV1 is kept as electricity, pumps the independent fuel feeding of B1 by middle flow servo；Four YV4 of solenoid directional control valve obtain it is electric close four C4 of dynamic valve rapidly,
The pressure of master cylinder epicoele is directly controlled by middle flow servo pump B1, and solenoid directional control valve five switches to right working position and controlled by five F5 of pressure regulator valve
The branch bulging of master cylinder cavity of resorption processed；
(5) sliding block pressure maintaining: each valve keeps step state (4) and stays for some time, and is protected by flow servo pump B1 control
The pressure of pressure；
(6) sliding block release: proportioning valve YAA first it is electric, master cylinder upper cavity pressure is unloaded in advance；Then solenoid directional control valve one
YV1, four YV4 of solenoid directional control valve, solenoid directional control valve five, seven YV7 of solenoid directional control valve, the equal power loss of nine YV9 of solenoid directional control valve, sliding block obtain
With complete release；
(7) sliding block backhaul: one YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve simultaneously it is electric, big flow servopump B2 and
Middle flow servo pumps the common fuel feeding of B1, eight YV8 of solenoid directional control valve obtain it is electric open eight CZ8 of inserted valve, nine YV9 of solenoid directional control valve is obtained
Electricity opens nine CZ9 of inserted valve, and pressure oil enters the cavity of resorption of master cylinder, master cylinder band movable slider uplink；Proportioning valve YAA power loss is closed,
Seven YV7 of solenoid directional control valve keeps power loss to remain turned-off seven C7 of dynamic valve, and four YV4 of solenoid directional control valve keeps power loss to make dynamic valve four
C4 is stayed open, and the oil liquid of master cylinder epicoele can be quickly returning to top tank；
(8) shut down: all equal power loss of solenoid directional control valve, servo motor stop.
When sliding block fast downlink, main pump outlet pipeline G3 does not build pressure, servo-driver SDR flow control servo motor
The operating of one M1；When sliding block slows down pressurization or pressure maintaining, main pump outlet pipeline G3 has built pressure and has pumped B1 by middle flow servo
Independent fuel feeding, the pressure of the outlet flow servo pump B1 into servo-driver SDR Real-time Feedback pump intake pressure sensor PN1, knot
The high response of one M1 of servo motor is closed, the flow output of flow servo pump B1, servo-driver SDR are adjusted using PID in adjustment
The oil pressure of main pump outlet pipeline G3 is controlled, realizes and stablizes pressurization, avoid overshooting；When sliding block release, ratio is controlled by electric signal
Example valve YAA can not only realize fast pressure relief but also the linear opening of controllable opening, realize without impact, accomplish sliding block pressure maintaining to release
Smooth transition.Servo-driver SDR using flow control and PID adjust control both of which switching, it can be achieved that sliding block it is steady
Fixed pressurization, guarantees the precision of pressure control, avoids pressurization overshoot that part is made to generate the deformation that can not be restored.It not will cause when release
The loosening of very big impact sound and fixing piece.
The foregoing is merely the preferable possible embodiments of the utility model, patent that is non-therefore limiting to the utility model
Protection scope.In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change
The technical solution to be formed is changed, is all fallen in the protection scope of the requires of the utility model.Technology of the utility model without description is special
Sign can realize that details are not described herein by or using the prior art.
Claims (8)
1. a kind of precision pressure control system of servo-pump control hydraulic press, including the master cylinder (1) being mounted on above sliding block, master cylinder
(1) cavity of resorption is connected with master cylinder cavity of resorption oil circuit (G1), and the epicoele of master cylinder (1) is connected with master cylinder epicoele oil circuit (G2), and feature exists
In: it further include the middle flow servo pump (B1) and big flow servopump (B2) driven jointly by servo motor one (M1), middle flow
The outlet of servopump (B1) is connected with the entrance of inserted valve one (CZ1), the outlet of big flow servopump (B2) and inserted valve two
(CZ2) entrance is connected, and the hydraulic control mouth of inserted valve one (CZ1) and inserted valve two (CZ2) is connected with respective outlet respectively, inserts
The outlet of valve one (CZ1) and inserted valve two (CZ2) is connected with main pump outlet pipeline (G3), main pump outlet pipeline (G3) and dynamic
The entrance of valve seven (C7) is connected, and the outlet of dynamic valve seven (C7) is connected with master cylinder epicoele oil circuit (G2), the liquid of dynamic valve seven (C7)
Control mouth A is connected by throttle valve with A mouth of solenoid directional control valve seven (YV7), the hydraulic control mouth B of dynamic valve seven (C7) pass through throttle valve and
The B mouth of solenoid directional control valve seven (YV7) is connected, and the P mouth of solenoid directional control valve seven (YV7) is connected with control oil liquid pipe (G4), and electromagnetism changes
It is connected to the T mouth of valve seven (YV7) with lower fuel tank, solenoid directional control valve seven (YV7) is two four-way electromagnetic reversing valves of Y type.
2. the precision pressure control system of servo-pump control hydraulic press according to claim 1, it is characterised in that: further include by
The small flow servo of servo motor two (M2) driving pumps (B3), outlet and inserted valve three (CZ3) of small flow servo pump (B3)
Entrance is connected, and the hydraulic control mouth of inserted valve three (CZ3) is connected with the A mouth of solenoid directional control valve three (YV3), solenoid directional control valve three (YV3)
P mouth be connected with auxiliary feed-oil pipe (G5), the T mouth of solenoid directional control valve three (YV3) is connected with lower fuel tank, solenoid directional control valve three
It (YV3) is two four-way electromagnetic reversing valves of D type, the outlet of inserted valve three (CZ3) is connected with auxiliary feed-oil pipe (G5), auxiliary feed-oil
The outlet of pipe (G5) is connected by ball valve one (V1) with control oil liquid pipe (G4)；Accumulator is connected on auxiliary feed-oil pipe (G5)
(AC) and energy storage pressure sensor (PN2).
3. the precision pressure control system of servo-pump control hydraulic press according to claim 2, it is characterised in that: middle flow is watched
The outlet of clothes pump (B1) is equipped with pump intake pressure sensor (PN1), and is connected with the entrance of dynamic valve one (C1), dynamic valve one
(C1) outlet is connected with lower fuel tank, and the hydraulic control mouth A of dynamic valve one (C1) passes through the A of throttle valve and solenoid directional control valve one (YV1)
Mouth is connected, and the hydraulic control mouth B of dynamic valve one (C1) is connected by throttle valve with the B mouth of solenoid directional control valve one (YV1), solenoid directional control valve
The P mouth of one (YV1) is connected with control oil liquid pipe (G4), and the T mouth of solenoid directional control valve one (YV1) is connected with lower fuel tank；Big flow is watched
The export pipeline of clothes pump (B2) is connected with the entrance of dynamic valve two (C2), and the outlet of dynamic valve two (C2) is connected with lower fuel tank, moves
The hydraulic control mouth A of state valve two (C2) is connected by throttle valve with the A mouth of solenoid directional control valve two (YV2), the hydraulic control of dynamic valve two (C2)
Mouth B is connected by throttle valve with the B mouth of solenoid directional control valve two (YV2), the P mouth and control oil liquid pipe of solenoid directional control valve two (YV2)
(G4) it is connected, the T mouth of solenoid directional control valve two (YV2) is connected with lower fuel tank；Solenoid directional control valve one (YV1) and solenoid directional control valve two
It (YV2) is two four-way electromagnetic reversing valves of D type.
4. the precision pressure control system of servo-pump control hydraulic press according to claim 2, it is characterised in that: middle flow is watched
The export pipeline of clothes pump (B1) is connected by pressure regulator valve one (F1) with lower fuel tank, and the export pipeline of big flow servopump (B2) is logical
Pressure regulator valve two (F2) is crossed to be connected with lower fuel tank, auxiliary feed-oil pipe (G5) also respectively by pressure regulator valve three (F3) and ball valve two (V2) with
Lower fuel tank is connected.
5. the precision pressure control system of servo-pump control hydraulic press according to claim 3, it is characterised in that: main pump outlet
The outlet of pipeline (G3) is connected with the entrance of inserted valve eight (CZ8), outlet and inserted valve nine (CZ9) of inserted valve eight (CZ8)
Entrance is connected, and the outlet of inserted valve nine (CZ9) is connected with master cylinder cavity of resorption oil circuit (G1)；The hydraulic control mouth and shuttle of inserted valve eight (CZ8)
The centre exit of valve (S1) is connected, and the right entry of shuttle valve (S1) is connected with the outlet of inserted valve eight (CZ8), and a left side for shuttle valve (S1) enters
Mouth is connected with the A mouth of solenoid directional control valve eight (YV8), the entrance phase of the P mouth and inserted valve eight (CZ8) of solenoid directional control valve eight (YV8)
Even, the T mouth of solenoid directional control valve eight (YV8) is connected with lower fuel tank, and solenoid directional control valve eight (YV8) is the two four-way electromagnetic commutations of D type
Valve；The hydraulic control mouth of inserted valve nine (CZ9) is connected with the A mouth of solenoid directional control valve nine (YV9), the P mouth of solenoid directional control valve nine (YV9) with
The outlet of inserted valve nine (CZ9) is connected, and the T mouth of solenoid directional control valve nine (YV9) is connected with lower fuel tank, solenoid directional control valve nine (YV9)
For two-bit triplet solenoid directional control valve；Master cylinder cavity of resorption oil circuit (G1) is also connected by pressure regulator valve four (F4) with lower fuel tank.
6. the precision pressure control system of servo-pump control hydraulic press according to claim 5, it is characterised in that: inserted valve nine
(CZ9) entrance is connected with the entrance of inserted valve five (CZ5), and the outlet of inserted valve five (CZ5) is connected with lower fuel tank, inserted valve five
(CZ5) hydraulic control mouth is connected with the A mouth of solenoid directional control valve five (YV5, YV6), and the B mouth of solenoid directional control valve five and T mouthfuls are respectively under
Fuel tank is connected, and the P mouth of solenoid directional control valve five is connected by pressure regulator valve five (F5) with lower fuel tank, and the A mouth of solenoid directional control valve five passes through
Pressure regulator valve six (F6) is connected with lower fuel tank, and solenoid directional control valve is fifth is that Median Function is O-shaped three-position four-way electromagnetic directional valve.
7. the precision pressure control system of servo-pump control hydraulic press according to claim 6, it is characterised in that: master cylinder epicoele
Oil circuit (G2) is connected with the entrance of dynamic valve four (C4), and the outlet of dynamic valve four (C4) is connected with top tank, dynamic valve four (C4)
Hydraulic control mouth A be connected with the A mouth of solenoid directional control valve four (YV4) by throttle valve, the hydraulic control mouth B of dynamic valve four (C4) passes through throttling
Valve is connected with the B mouth of solenoid directional control valve four (YV4), and the P mouth of solenoid directional control valve four (YV4) is connected with control oil liquid pipe (G4), electricity
The T mouth of magnetic reversal valve four (YV4) is connected with top tank, and solenoid directional control valve four (YV4) is two four-way electromagnetic reversing valves of D type；It is main
Cylinder epicoele oil circuit (G2) is also connected with the entrance of proportioning valve (YAA), and the outlet of proportioning valve (YAA) is connected with fuel tank.
8. the precision pressure control system of servo-pump control hydraulic press according to claim 7, it is characterised in that: servo motor
One (M1) is controlled by servo-driver (SDR), and three-phase alternating-current supply is driven by breaker (QF1) and filter (EM1) and servo
The power end connection of dynamic device (SDR), the encoder (PG) for being mounted on the tail portion servo motor one (M1) are connected to servo-driver
(SDR) on the port CN1, pump intake pressure sensor (PN1) is current feedback pressure sensor and is connected to servo-driver
(SDR) on the port CN2, the AIO+ of the SM231 module of the A01 foot and PLC controller of the port CN3 of servo-driver (SDR)
Port is connected, the port the AIO- phase of the SM231 module of the AGND foot and PLC controller of the port CN3 of servo-driver (SDR)
Even；The CAN communication interface of servo-driver (SDR) is connected with the CANopen module of PLC controller；Servo enables button (SB1)
It is connected between the enabling signal input terminal (S-ON) of servo-driver (SDR) and the port V1+, alarm reset button (SB2) is even
It connects between the reset signal input terminal (ALM-RST) of servo-driver (SDR) and the port V1+；The coil of relay one (KA1)
It is connected between the alarm signal end (ALM) of servo-driver (SDR) and the port V1-, the normally open contact string of relay one (KA1)
It is associated between 0.0 port and the port V1+ of the SM223 module of PLC controller；The coil of relay two (KA2) is connected to servo
Between the Dual-pump flow-converging signal input part (TGON) of driver (SDR) and the port V1-, the normally open contact string of relay two (KA2)
It is associated between 0.1 port and the port V1+ of the SM223 module of PLC controller；The CPU of PLC controller passes through ethernet communication line
It is connected with touch screen (PM1), the port V1+ connects+24VDC, the port V1- ground connection；Servo-driver (SDR) uses ProNet-2BDIB
Ai Sidun servo-driver, PLC controller use Siemens 6ES7215-1BG40-0XB0 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820707454.6U CN208236791U (en) | 2018-05-14 | 2018-05-14 | The precision pressure control system of servo-pump control hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820707454.6U CN208236791U (en) | 2018-05-14 | 2018-05-14 | The precision pressure control system of servo-pump control hydraulic press |
Publications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561346A (en) * | 2018-05-14 | 2018-09-21 | 江苏国力锻压机床有限公司 | The precision pressure control system and hydraulic pressure processing method of servo-pump control hydraulic press |
| CN109795148A (en) * | 2019-03-04 | 2019-05-24 | 无锡市鹏达海卓智能装备有限公司 | The hydraulic system of the hydraulic press of servo motor pump group driving |
| CN110550552A (en) * | 2019-10-08 | 2019-12-10 | 三一汽车起重机械有限公司 | Pressure regulating system, crane and pressure regulating method |
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2018
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561346A (en) * | 2018-05-14 | 2018-09-21 | 江苏国力锻压机床有限公司 | The precision pressure control system and hydraulic pressure processing method of servo-pump control hydraulic press |
| CN108561346B (en) * | 2018-05-14 | 2023-08-25 | 江苏扬力液压装备有限公司 | Precise pressure control system of servo pump control hydraulic machine and hydraulic machining method |
| CN109795148A (en) * | 2019-03-04 | 2019-05-24 | 无锡市鹏达海卓智能装备有限公司 | The hydraulic system of the hydraulic press of servo motor pump group driving |
| CN110550552A (en) * | 2019-10-08 | 2019-12-10 | 三一汽车起重机械有限公司 | Pressure regulating system, crane and pressure regulating method |
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Effective date of registration: 20220224 Address after: 225000 No. 17, shepherd Road, high tech Industrial Development Zone, Yangzhou City, Jiangsu Province Patentee after: Jiangsu Yangli Hydraulic Equipment Co.,Ltd. Address before: 225127 No. 98, Yangli Road, Hanjiang Economic and Technological Development Zone, Hanjiang District, Yangzhou City, Jiangsu Province Patentee before: JIANGSU GUOLI FORGING MACHINE TOOL Co.,Ltd. |