CN109779985A - Gear pump control hydraulic control system of bender and its control method - Google Patents
Gear pump control hydraulic control system of bender and its control method Download PDFInfo
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- CN109779985A CN109779985A CN201910078421.9A CN201910078421A CN109779985A CN 109779985 A CN109779985 A CN 109779985A CN 201910078421 A CN201910078421 A CN 201910078421A CN 109779985 A CN109779985 A CN 109779985A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002828 fuel tank Substances 0.000 claims abstract description 50
- 239000003921 oil Substances 0.000 claims description 185
- 239000007788 liquid Substances 0.000 claims description 26
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 206010020852 Hypertonia Diseases 0.000 claims description 4
- 239000010727 cylinder oil Substances 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 2
- 230000002085 persistent effect Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009790 rate-determining step (RDS) Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Abstract
The present invention relates to a kind of gear pump control hydraulic control system of bender and its control methods, control system includes: including servo motor, gear pump and high pressure filter, the inlet port of gear pump connects fuel tank, the oil outlet of high pressure filter is connected to the first two four-way electromagnetic reversing valve oil inlets, the second two four-way electromagnetic reversing valve oil inlets, two four-way electromagnetic reversing valve oil inlets of third, the control mouth of the working hole connection normally closed type prefill valve of the first two four-way electromagnetic reversing valves, two working holes of the second two four-way electromagnetic reversing valves are respectively communicated to oil cylinder rodless cavity and the first overflow valve, the working hole of two four-way electromagnetic reversing valves of third is connect with 2/2-way Solenoid ball valve.The case where this system is made using the control hydraulic system work precession of two position and four-way reversing valves, in two position and four-way reversing valve failures, will not generate rodless cavity persistent pressure, and rod chamber generates hyperpressure occurs, and improves security of system.
Description
Technical field
The present invention relates to bender control system fields, and in particular to a kind of gear pump control hydraulic control system of bender and
Its control method.
Background technique
At present in bending machine industry, gear pump control bender hydraulic system is in new technology just at this stage, has energy conservation,
Efficiently, the series of advantages such as noise reduction, but its technology is also immature, it is not perfect.
Existing bender hydraulic system is generally pumped by individual event and is controlled, and the hydraulic system of one-way pump control is in 3-position 4-way electricity
Magnetic defective diverted valve, when movement is not able to cooperate, there are the security risks of oil cylinder cavity of resorption hypertonia, and there are at high cost, works
The shortcomings that making low efficiency.
Summary of the invention
The purpose of the present invention is to provide a kind of gear pump control hydraulic control system of bender and its control methods, to solve
The problem of bender hydraulic system safety difference certainly in the prior art.
One aspect of the present invention provides a kind of control method of gear pump control hydraulic control system of bender, comprising:
(1) fast lower movement
YV1, YV4, YV6 obtain electric, remaining solenoid valve power loss, and 2/2-way Solenoid ball valve is in two right position, third four-ways
Solenoid directional control valve is in right position, the first two four-way electromagnetic reversing valves are in right position, the second two four-way electromagnetic reversing valves are in
Left position, at the same time, external digital control system give servo motor negative instruction, and servo motor drives gear pump to invert oil suction, and oil cylinder has
Hydraulic oil in rod cavity enters gear by 2/2-way Solenoid ball valve, two four-way electromagnetic reversing valves of third and return check valve
Pump, and fuel tank is flow back to through gear pump, in-oil cylinder sliding block and piston rod realize fast lower movement under Gravitative Loads, make oil cylinder rodless
Intracavitary generation negative pressure, prefill valve are opened under negative pressure state, and the oil liquid in fuel tank enters oil cylinder rodless by normally closed type prefill valve
Chamber；
The revolving speed of servo motor is adjusted by external digital control system, to control the rate of release of cylinder rod chamber hydraulic oil,
And then adjust the decrease speed of piston；
(2) work precession is made
YV5, YV6 obtain electric, remaining solenoid valve power loss, and the first two four-way electromagnetic reversing valves are in right position, the second two four
Electric change valve is in right position, two four-way electromagnetic reversing valves of third are in left position, 2/2-way Solenoid ball valve is in left position,
Normally closed type prefill valve is closed under the action of the spring, and external digital control system gives servo motor positive order, and servo motor drives gear pump
Rotate forward from fuel tank oil suction, oil liquid flows into high pressure filter from the oil outlet of gear pump, filtered oil liquid by line check valve,
The second two four-way electromagnetic reversing valves enter oil cylinder rodless cavity, generate high pressure in oil cylinder rodless cavity in oil liquid, push piston downlink；
Cylinder rod chamber is exercised under piston and generates high pressure, when reaching the cracking pressure of the first overflow valve, opens the first overflow
Valve, hydraulic oil returns to fuel tank by the oil return opening of the second two four-way electromagnetic reversing valves, thus realize that piston moves downward at a slow speed,
I.e. work into；
Work speed can control servo motor revolving speed, and then obtain friction speed by adjusting external numerical control system parameter；
Work can control servo motor torque, and then obtain different pressures by adjusting external numerical control system parameter into pressure；
(3) pressure maintaining acts
YV5, YV6 continue electric, remaining solenoid valve power loss, the reality that external digital control system is fed back according to external testing tool
The deviation of positional value and target position gives the lower revolving speed of servo motor and torque, by the revolving speed for adjusting servo motor
Carry out the oil pump capacity of adjusting tooth wheel pump, i.e., balance is reached by the oil inlet quantity and leakage rate that adjust oil cylinder rodless cavity and keep living in oil cylinder
It is constant to fill in position, carries out pressure maintaining；
(4) off-load acts
YV5, YV6 continue electric, remaining solenoid valve power loss, and external digital control system gives servo motor negative instruction, servo motor
Gear pump reversion is driven, oil cylinder rodless cavity oil liquid enters gear pump through the second solenoid directional control valve and return check valve, through gear pump
Fuel tank is flow back to, oil cylinder rodless cavity pressure reduces rapidly, and the setting value until being reduced to pressure sensor, system unloaded terminates；
External digital control system can be by adjusting servo motor rotational speed regulation unloading rate and time；
(5) backhaul action
YV4 obtains electric, remaining solenoid valve power loss, and two four-way electromagnetic reversing valves of third are in right position, and the first two four are powered
Magnetic reversal valve, the second two four-way commutation reversal valves, 2/2-way Solenoid ball valves are in left position, and external digital control system is to servo
Motor positive order, servo motor drive gear pump to be rotated forward, and gear pump generates high pressure from fuel tank oil suction, in oil outlet
Oil, is divided into two-way after high pressure filter, second one-way valve, and the first via is entered normally closed by the first two four-way electromagnetic reversing valves
Formula prefill valve control mouth, opens normally closed type prefill valve, and the second tunnel passes through two four-way electromagnetic reversing valves of third, 2/2-way electromagnetism
Ball valve enters cylinder rod chamber, moves upwards oil cylinder inner piston, and oil cylinder rodless cavity hydraulic oil is by normally closed type prefill valve and the
2 two four-way electromagnetic reversing valves return to fuel tank；
External digital control system adjusts the oil liquid flow of gear pump by adjusting the revolving speed of servo motor, so as to adjust oil cylinder
The rate of climb of inner piston cuts off YV4, changes two four-way electromagnetics of third after external testing tool feeds back oil cylinder stroke in place
Left position is returned to valve, oil inlet and the drainback passage of cylinder rod chamber is cut off, oil cylinder is made to be maintained at target position.
Further, when work precession is made, when hypertonia in cylinder rod chamber, the second overflow valve is opened, and oil cylinder has
The hydraulic oil of rod cavity flows back to fuel tank by the oil return opening of the second overflow valve.
Another aspect of the present invention provides a kind of gear pump control hydraulic control system of bender, including servo motor, gear pump
And high pressure filter, the inlet port of the power output end tooth connection wheel pump of the servo motor, the gear pump connect fuel tank, institute
The oil outlet connection high pressure filter and return check valve of gear pump are stated, oil inlet list is arranged in the oil outlet of the high pressure filter
To valve, the return check valve and high pressure filter are in parallel；
The oil outlet of the in line check valve is divided into four tunnels, is respectively communicated to the first two four-way electromagnetic reversing valve oil inlets
Mouthful, the second two four-way electromagnetic reversing valve oil inlets, two four-way electromagnetic reversing valve oil inlets of third and return check valves；
The control mouth of the working hole connection normally closed type prefill valve of the first two four-way electromagnetic reversing valves, the normally closed type
The oil inlet of prefill valve is connect with fuel tank, and the oil outlet of the normally closed type prefill valve is connected to oil cylinder rodless cavity；
Two working holes of the second two four-way electromagnetic reversing valves are respectively communicated to oil cylinder rodless cavity and the first overflow
Valve, first overflow valve are connected to cylinder rod chamber, and the oil inlet of the oil cylinder rodless cavity is connected to pressure sensor；
The working hole of two four-way electromagnetic reversing valves of third is connect with 2/2-way Solenoid ball valve, the 2/2-way
Solenoid ball valve is connected to cylinder rod chamber；
The first two four-way electromagnetic reversing valves, the second two two four-way electromagnetics of four-way electromagnetic reversing valve and third change
Fuel tank is connected to the oil return opening of valve.
Further, the oil inlet of the cylinder rod chamber is also connected to the second overflow valve, the oil return of second overflow valve
Mouth connection fuel tank.
Further, the oil outlet of the in line check valve is also connected to third overflow valve, the oil return of the third overflow valve
Mouth connection fuel tank.
Further, differential pressure pickup is set in the high pressure filter, for logical in the blocking of high pressure filter Inner filter net
Oil issues electric signal, prompt system failure when unsmooth.
Further, the servo motor is bilateral servo motor, can be rotated and reverse.
Further, the gear pump is two-way crescent gear pump, and the gear pump is rotated forward from fuel tank oil suction, and reversion is real
Existing hydraulic cylinder oil extraction.
Further, equipped with throttling at the normally closed type prefill valve control mouth.
Further, the oil inlet of the oil cylinder rodless cavity is also connected to the first pressure measuring tie-in, the cylinder rod chamber into
Hydraulic fluid port is also connected to the second pressure measuring tie-in, and the oil outlet of the in line check valve is also connected to third pressure measuring tie-in.
Beneficial effect using aforementioned present invention technical solution is:
Hydraulic control system of bender of the present invention uses two-way crescent gear pump, relative to unidirectional crescent gear pump,
With the high advantage of volumetric efficiency, the oil absorption and oil drain quantity under same revolving speed are increased, is controlled relative to bidirectional ram pump hydraulic
System has advantage at low cost, because its oil outlet leads directly to fuel tank, will not there is pressure for a long time, with high excellent of service life
Gesture；
This system is made using the control hydraulic system work precession of two position and four-way reversing valves, in two position and four-way reversing valve failures,
In the state that rodless cavity persistent pressure will not be generated, cylinder rod chamber is unable to oil return to fuel tank, and rod chamber is in oil cylinder supercharging effect
The case where lower generation hyperpressure, occurs, and improves security of system；
Work, which is controlled, using two position and four-way reversing valves causes two there is no because of reversal valve response speed difference into process
Position and four-way reversing valve is first opened, and is opened after three position four-way directional control valve, when valve port being caused to be not switched on, has generated high pressure, is opened
When release stress vibration and the noise of generation, and reduce rate-determining steps, increase work into the continuity and work of process into process
Change speed reduces the complexity of system pipeline, reduces length of pipe, so that the system oil liquid of reducing returns to the resistance of fuel tank
Power improves operating rate, moreover, two four-way commutation reversal valves have advantage at low cost compared to three position four-way directional control valve.
Detailed description of the invention
Fig. 1 is gear pump control hydraulic control system of bender oil channel structures schematic diagram of the present invention；
In attached drawing, parts list represented by the reference numerals are as follows:
The first two four-way electromagnetic reversing valves of 1-, 2- the second two two four-way electromagnetic reversing valves, 3- third four-way electromagnetics
Reversal valve, 4- 2/2-way Solenoid ball valve, the first overflow valve of 5-, the second overflow valve of 6-, 7- third overflow valve, 8- normally closed type filling liquid
Valve, 9- servo motor, 10- gear pump, 11- high pressure filter, 12- pressure sensor, the first pressure measuring tie-in of 13-, 14- second are surveyed
Crimp head, 15- third pressure measuring tie-in, 16- oil cylinder, 17- fuel tank, 18- return check valve, 19- in line check valve.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
As shown in Figure 1, a kind of gear pump control hydraulic control system of bender of the embodiment of the present invention, including servo motor 9, tooth
Wheel pump 10 and high pressure filter 11, the power output end tooth connection wheel pump 10 of the servo motor 9, the oil suction of the gear pump 10
Mouth connection fuel tank 17, the oil outlet connection high pressure filter 11 and return check valve 18 of the gear pump 10, the high-pressure filteration
In line check valve 19 is arranged in the oil outlet of device 11, and the return check valve 18 and high pressure filter 11 are in parallel；The oil inlet list
Be divided into four tunnels to the oil outlet of valve 19, be respectively communicated to the first two 1 oil inlets of four-way electromagnetic reversing valve, the second two four be powered
2 oil inlet of magnetic reversal valve, two 3 oil inlets of four-way electromagnetic reversing valve of third and return check valve 18；The first two four-ways
The control mouth of the working hole connection normally closed type prefill valve 8 of solenoid directional control valve 1, the oil inlet and fuel tank of the normally closed type prefill valve 8
The oil outlet of 17 connections, the normally closed type prefill valve 8 is connected to 16 rodless cavity of oil cylinder；The second two four-way electromagnetic reversing valves 2
Two working holes be respectively communicated to 16 rodless cavity of oil cylinder and the first overflow valve 5, first overflow valve 5, which is connected to oil cylinder 16, to be had
The oil inlet of rod cavity, 16 rodless cavity of oil cylinder is connected to pressure sensor 12；The work of two four-way electromagnetic reversing valves 3 of third
Make mouth to connect with 2/2-way Solenoid ball valve 4, the 2/2-way Solenoid ball valve 4 is connected to 16 rod chamber of oil cylinder；Described first
The oil return opening of two four-way electromagnetic reversing valves 1, the second two two four-way electromagnetic reversing valves 3 of four-way electromagnetic reversing valve 2 and third
It is connected to fuel tank 17.
Preferably, the oil inlet of 16 rod chamber of oil cylinder is also connected to the second overflow valve 6, and second overflow valve 6 returns
Hydraulic fluid port is connected to fuel tank 17.
Preferably, the oil outlet of the in line check valve 19 is also connected to third overflow valve 7, and the third overflow valve 7 returns
Hydraulic fluid port is connected to fuel tank 17.
Preferably, differential pressure pickup is set in the high pressure filter 11, for blocking in 11 Inner filter net of high pressure filter
Electric signal, prompt system failure are issued when logical oily unsmooth.
Preferably, the servo motor 9 is bilateral servo motor, can be rotated and reverse, the gear pump 10 is double
To crescent gear pump, the gear pump 10 is rotated forward from 17 oil suction of fuel tank, and hydraulic cylinder oil extraction is realized in reversion.
Preferably, equipped with throttling at 8 control mouth of normally closed type prefill valve.
Preferably, the oil inlet of 16 rodless cavity of oil cylinder is also connected to the first pressure measuring tie-in 13,16 rod chamber of oil cylinder
Oil inlet be also connected to the second pressure measuring tie-in 14, the oil outlet of the in line check valve 19 is also connected to third pressure measuring tie-in 15, institute
The first pressure measuring tie-in 13 is stated, the second pressure measuring tie-in 14 when third pressure measuring tie-in 15 is used for equipment debugging, connects external pressure of surveying and sets
It is standby, check channel interior pressure condition
The control method of the gear pump control hydraulic control system of bender, comprising:
(1) fast lower movement
YV1, YV4, YV6 obtain electric, remaining solenoid valve power loss, and 2/2-way Solenoid ball valve 4 is in two right position, third four-ways
Solenoid directional control valve 3 is in right position, the first two four-way electromagnetic reversing valves 1 are in right position, at the second two four-way electromagnetic reversing valves 2
In left position, at the same time, external digital control system gives servo motor 9 negative instruction, and servo motor 9 drives gear pump 10 to invert oil suction,
Hydraulic oil in 16 rod chamber of oil cylinder is unidirectional by 2/2-way Solenoid ball valve 4, two four-way electromagnetic reversing valves 3 of third and oil return
Valve 18 enters gear pump 10, and flows back to fuel tank 17 through gear pump 10, and the sliding block and piston rod in oil cylinder 16 are real under Gravitative Loads
Now fast lower movement, makes to generate negative pressure in 16 rodless cavity of oil cylinder, prefill valve is opened under negative pressure state, and the oil liquid in fuel tank 17 passes through
Normally closed type prefill valve 8 enters 16 rodless cavity of oil cylinder；The revolving speed of servo motor 9 is adjusted, by external digital control system to control oil cylinder
The rate of release of 16 rod chamber hydraulic oil, and then adjust the decrease speed of piston.
(2) work precession is made
YV5, YV6 obtain electric, remaining solenoid valve power loss, and the first two four-way electromagnetic reversing valves 1 are in right position, the second two four
Electric change valve 2 is in right position, two four-way electromagnetic reversing valves 3 of third are in left position, 2/2-way Solenoid ball valve 4 is in a left side
Position, normally closed type prefill valve 8 are closed under the action of the spring, and external digital control system gives servo motor 9 positive order, and servo motor 9 drives
Gear pump 10 is rotated forward from 17 oil suction of fuel tank, and oil liquid flows into high pressure filter 11, filtered oil liquid from the oil outlet of gear pump 10
Enter 16 rodless cavity of oil cylinder by line check valve 19, the second two four-way electromagnetic reversing valves 22, in oil liquid in oil cylinder 16 without bar
Chamber generates high pressure, pushes piston downlink；16 rod chamber of oil cylinder is exercised under piston and generates high pressure, reaches the unlatching of the first overflow valve 5
When pressure, the first overflow valve 5 is opened, hydraulic oil returns to fuel tank 17 by the oil return opening of the second two four-way electromagnetic reversing valves 22,
To realizing that piston moves downward at a slow speed, i.e., work into；Work speed can be by adjusting external numerical control system parameter, control servo electricity
9 revolving speed of machine, and then obtain friction speed；Work can be by adjusting external numerical control system parameter into pressure, and control servo motor 9 is turned round
Square, and then obtain different pressures；When hypertonia in 16 rod chamber of oil cylinder, the second overflow valve 6 is opened, 16 rod chamber of oil cylinder
Hydraulic oil flows back to fuel tank 17 by the oil return opening of the second overflow valve 6.
(3) pressure maintaining acts
YV5, YV6 continue electric, remaining solenoid valve power loss, the reality that external digital control system is fed back according to external testing tool
The deviation of positional value and target position gives the lower revolving speed of servo motor 9 and torque, by adjusting turning for servo motor 9
Speed carrys out the oil pump capacity of adjusting tooth wheel pump 10, i.e., reaches balance by the oil inlet quantity and leakage rate that adjust 16 rodless cavity of oil cylinder and keep oil
16 inner piston position of cylinder is constant, carries out pressure maintaining.
(4) off-load acts
YV5, YV6 continue electric, remaining solenoid valve power loss, and external digital control system gives servo motor 9 negative instruction, servo motor
9 drive gear pump 10 to invert, and 16 rodless cavity oil liquid of oil cylinder enters gear pump 10 through the second solenoid directional control valve and return check valve 18,
Fuel tank 17 is flow back to through gear pump 10, pressure reduces rapidly in 16 rodless cavity of oil cylinder, the setting until being reduced to pressure sensor 12
Value, system unloaded terminate；External digital control system can be by adjusting 9 rotational speed regulation unloading rate of servo motor and time.
(5) backhaul action
YV4 obtains electric, remaining solenoid valve power loss, and two four-way electromagnetic reversing valves 3 of third are in right position, and the first two four are powered
Magnetic reversal valve 11, the second two four-way commutation reversal valves, 2/2-way Solenoid ball valves 4 are in left position, and external digital control system is given
9 positive order of servo motor, servo motor 9 drive gear pump 10 to be rotated forward, and gear pump 10 is from 17 oil suction of fuel tank, fuel-displaced
Mouthful high pressure oil is generated, be divided into two-way after high pressure filter 11, second one-way valve, the first via is changed by the first two four-way electromagnetics
Enter 8 control mouth of normally closed type prefill valve to valve 11, opens normally closed type prefill valve 8, the second tunnel is changed by two four-way electromagnetics of third
To valve 3,2/2-way Solenoid ball valve 4 enters 16 rod chamber of oil cylinder, moves upwards 16 inner piston of oil cylinder, 16 rodless cavity liquid of oil cylinder
Pressure oil returns to fuel tank 17 by normally closed type prefill valve 8 and the second two four-way electromagnetic reversing valves 22；External digital control system passes through tune
The revolving speed of servo motor 9 is saved to adjust the oil liquid flow of gear pump 10, so as to adjust the rate of climb of 16 inner piston of oil cylinder, outside
After measuring tool feeds back 16 Overstroke of oil cylinder, YV4 is cut off, two four-way electromagnetic reversing valves 3 of third is made to return left position, cutting oil
The oil inlet of 16 rod chamber of cylinder and drainback passage, make oil cylinder 16 be maintained at target position.
To sum up, hydraulic control system of bender of the present invention uses two-way crescent gear pump, relative to unidirectional internal messing tooth
Wheel pump increases the oil absorption and oil drain quantity under same revolving speed with the high advantage of volumetric efficiency, controls relative to bidirectional ram pump
Hydraulic system has advantage at low cost, because its oil outlet leads directly to fuel tank, will not there is pressure for a long time, has service life high
Advantage；This system is made using the control hydraulic system work precession of two position and four-way reversing valves, in two position and four-way reversing valve failures, no
In the state that rodless cavity persistent pressure can be generated, cylinder rod chamber is unable to oil return to fuel tank, and rod chamber is under oil cylinder supercharging effect
The case where generating hyperpressure occurs, and improves security of system；Using a two position and four-way reversing valves control work into process, do not deposit
Because of reversal valve response speed difference, two position and four-way reversing valves is caused first to open, and opened after three position four-way directional control valve, causes valve
Mouth is when being not switched on, and has generated high pressure, and when opening releases stress vibration and the noise of generation, and reduces rate-determining steps, increases
Work into process continuity and work into process change speed, reduce system pipeline complexity, reduce length of pipe, thus
The system oil liquid of reducing returns to the resistance of fuel tank, improves operating rate, moreover, two four-way commutation reversal valves compare 3-position 4-way
Reversal valve has advantage at low cost.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of control method of gear pump control hydraulic control system of bender characterized by comprising
(1) fast lower movement
YV1, YV4, YV6 obtain electric, remaining solenoid valve power loss, and 2/2-way Solenoid ball valve is in two right position, third four-way electromagnetics
Reversal valve is in right position, the first two four-way electromagnetic reversing valves are in right position, the second two four-way electromagnetic reversing valves are in left position,
At the same time, external digital control system gives servo motor negative instruction, servo motor drive gear pump reversion oil suction, in cylinder rod chamber
Hydraulic oil gear pump is entered by 2/2-way Solenoid ball valve, two four-way electromagnetic reversing valves of third and return check valve, and
Fuel tank is flow back to through gear pump, in-oil cylinder sliding block and piston rod realize fast lower movement under Gravitative Loads, keep oil cylinder rodless intracavitary
Negative pressure is generated, prefill valve is opened under negative pressure state, and the oil liquid in fuel tank enters oil cylinder rodless cavity by normally closed type prefill valve；
The revolving speed of servo motor is adjusted by external digital control system, to control the rate of release of cylinder rod chamber hydraulic oil, in turn
Adjust the decrease speed of piston；
(2) work precession is made
YV5, YV6 obtain electric, remaining solenoid valve power loss, the first two four-way electromagnetic reversing valves be in right position, the second two four be powered
Magnetic reversal valve is in right position, two four-way electromagnetic reversing valves of third are in left position, 2/2-way Solenoid ball valve is in left position, normally closed
Formula prefill valve is closed under the action of the spring, and external digital control system gives servo motor positive order, and servo motor drives gear pump to rotate forward
From fuel tank oil suction, oil liquid flows into high pressure filter from the oil outlet of gear pump, and filtered oil liquid passes through in line check valve, second
Two four-way electromagnetic reversing valves enter oil cylinder rodless cavity, and oil liquid generates high pressure in oil cylinder rodless cavity, push piston downlink；
Cylinder rod chamber is exercised under piston and generates high pressure, when reaching the cracking pressure of the first overflow valve, opens the first overflow valve, liquid
Pressure oil returns to fuel tank by the oil return opening of the second two four-way electromagnetic reversing valves, to realize that piston moves downward at a slow speed, i.e. work
Into；
Work speed can control servo motor revolving speed, and then obtain friction speed by adjusting external numerical control system parameter；
Work can control servo motor torque, and then obtain different pressures by adjusting external numerical control system parameter into pressure；
(3) pressure maintaining acts
YV5, YV6 continue electric, remaining solenoid valve power loss, the physical location that external digital control system is fed back according to external testing tool
The deviation of value and target position gives the lower revolving speed of servo motor and torque, is adjusted by adjusting the revolving speed of servo motor
The oil pump capacity of gear pump is saved, i.e., balance is reached by the oil inlet quantity and leakage rate that adjust oil cylinder rodless cavity and keeps oil cylinder inner piston position
Set constant, progress pressure maintaining；
(4) off-load acts
YV5, YV6 continue electric, remaining solenoid valve power loss, and external digital control system gives servo motor negative instruction, and servo motor drives
Gear pump reversion, oil cylinder rodless cavity oil liquid enter gear pump through the second solenoid directional control valve and return check valve, flow back to through gear pump
Fuel tank, oil cylinder rodless cavity pressure reduce rapidly, and the setting value until being reduced to pressure sensor, system unloaded terminates；
External digital control system can be by adjusting servo motor rotational speed regulation unloading rate and time；
(5) backhaul action
YV4 obtains electric, remaining solenoid valve power loss, and two four-way electromagnetic reversing valves of third are in right position, and the first two four-way electromagnetics change
It is in left position to valve, the second two four-way commutation reversal valves, 2/2-way Solenoid ball valves, external digital control system is to servo motor
Positive order, servo motor drive gear pump to be rotated forward, and gear pump generates high pressure oil, warp from fuel tank oil suction, in oil outlet
It is divided into two-way after high pressure filter, second one-way valve, the first via enters normally closed type by the first two four-way electromagnetic reversing valves and fills
Liquid valve control mouth, opens normally closed type prefill valve, and the second tunnel passes through two four-way electromagnetic reversing valves of third, 2/2-way Solenoid ball valve
Into cylinder rod chamber, move upwards oil cylinder inner piston, oil cylinder rodless cavity hydraulic oil passes through normally closed type prefill valve and second liang
Position four-way electromagnetic reversing valve returns to fuel tank；
External digital control system adjusts the oil liquid flow of gear pump by adjusting the revolving speed of servo motor, so as to adjust living in oil cylinder
The rate of climb of plug cuts off YV4, makes two four-way electromagnetic reversing valves of third after external testing tool feeds back oil cylinder stroke in place
Left position is returned, oil inlet and the drainback passage of cylinder rod chamber is cut off, oil cylinder is made to be maintained at target position.
2. the control method of gear pump control hydraulic control system of bender according to claim 1, which is characterized in that in work
When precession is made, when hypertonia in cylinder rod chamber, the second overflow valve is opened, and the hydraulic oil of cylinder rod chamber overflows by second
The oil return opening of stream valve flows back to fuel tank.
3. a kind of gear pump control hydraulic control system of bender, which is characterized in that including servo motor, gear pump and high-pressure filteration
The inlet port of device, the power output end tooth connection wheel pump of the servo motor, the gear pump connects fuel tank, the gear pump
Oil outlet connects high pressure filter and return check valve, and in line check valve is arranged in the oil outlet of the high pressure filter, described
Return check valve and high pressure filter are in parallel；
The oil outlet of the in line check valve is divided into four tunnels, is respectively communicated to the first two four-way electromagnetic reversing valve oil inlets,
2 two four-way electromagnetic reversing valve oil inlets, two four-way electromagnetic reversing valve oil inlets of third and return check valve；
The control mouth of the working hole connection normally closed type prefill valve of the first two four-way electromagnetic reversing valves, the normally closed type filling liquid
The oil inlet of valve is connect with fuel tank, and the oil outlet of the normally closed type prefill valve is connected to oil cylinder rodless cavity；
Two working holes of the second two four-way electromagnetic reversing valves are respectively communicated to oil cylinder rodless cavity and the first overflow valve, institute
It states the first overflow valve and is connected to cylinder rod chamber, the oil inlet of the oil cylinder rodless cavity is connected to pressure sensor；
The working hole of two four-way electromagnetic reversing valves of third is connect with 2/2-way Solenoid ball valve, the 2/2-way electromagnetism
Ball valve is connected to cylinder rod chamber；
The first two four-way electromagnetic reversing valves, the second two two four-way electromagnetic reversing valves of four-way electromagnetic reversing valve and third
Oil return opening be connected to fuel tank.
4. gear pump control hydraulic control system of bender according to claim 3, which is characterized in that the cylinder rod chamber
Oil inlet be also connected to the second overflow valve, the oil return opening of second overflow valve is connected to fuel tank.
5. gear pump control hydraulic control system of bender according to claim 3, which is characterized in that the in line check valve
Oil outlet be also connected to third overflow valve, the oil return opening of the third overflow valve is connected to fuel tank.
6. gear pump control hydraulic control system of bender according to claim 3, which is characterized in that the high pressure filter
Interior setting differential pressure pickup, for issuing electric signal, prompt system failure when high pressure filter Inner filter net blocks logical oily unsmooth.
7. gear pump control hydraulic control system of bender according to claim 3, which is characterized in that the servo motor is
Bilateral servo motor can be rotated and reverse.
8. gear pump control hydraulic control system of bender according to claim 7, which is characterized in that the gear pump is double
To crescent gear pump, the gear pump is rotated forward from fuel tank oil suction, and hydraulic cylinder oil extraction is realized in reversion.
9. gear pump control hydraulic control system of bender according to claim 3, which is characterized in that the normally closed type filling liquid
Equipped with throttling at valve control mouth.
10. gear pump control hydraulic control system of bender according to claim 3, which is characterized in that the oil cylinder rodless
The oil inlet of chamber is also connected to the first pressure measuring tie-in, and the oil inlet of the cylinder rod chamber is also connected to the second pressure measuring tie-in, it is described into
The oil outlet of oily check valve is also connected to third pressure measuring tie-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078421.9A CN109779985A (en) | 2019-01-28 | 2019-01-28 | Gear pump control hydraulic control system of bender and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078421.9A CN109779985A (en) | 2019-01-28 | 2019-01-28 | Gear pump control hydraulic control system of bender and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109779985A true CN109779985A (en) | 2019-05-21 |
Family
ID=66502706
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910078421.9A Pending CN109779985A (en) | 2019-01-28 | 2019-01-28 | Gear pump control hydraulic control system of bender and its control method |
Country Status (1)
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| CN (1) | CN109779985A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111283673A (en) * | 2020-02-17 | 2020-06-16 | 广东博智林机器人有限公司 | Hydraulic system and mechanical arm |
| CN114030221A (en) * | 2021-11-24 | 2022-02-11 | 天水锻压机床(集团)有限公司 | Double-cylinder accurate constant-pressure fixed-stroke hydraulic variable-frequency servo control device |
| CN114876791A (en) * | 2022-06-02 | 2022-08-09 | 河南航天液压气动技术有限公司 | Flow intelligent calibration gear pump |
| US11408442B2 (en) | 2014-09-23 | 2022-08-09 | Project Phoenix, LLC | System to pump fluid and control thereof |
| US11512695B2 (en) | 2014-07-22 | 2022-11-29 | Project Phoenix, LLC | External gear pump integrated with two independently driven prime movers |
| TWI785667B (en) * | 2020-07-08 | 2022-12-01 | 美商鳳凰計劃股份有限公司 | Method of controlling motors of a pump and related apparatus and pump system |
| US11713757B2 (en) | 2014-02-28 | 2023-08-01 | Project Phoenix, LLC | Pump integrated with two independently driven prime movers |
| US11846283B2 (en) | 2015-09-02 | 2023-12-19 | Project Phoenix, LLC | System to pump fluid and control thereof |
| US11867203B2 (en) | 2014-06-02 | 2024-01-09 | Project Phoenix, LLC | Linear actuator assembly and system |
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2019
- 2019-01-28 CN CN201910078421.9A patent/CN109779985A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11713757B2 (en) | 2014-02-28 | 2023-08-01 | Project Phoenix, LLC | Pump integrated with two independently driven prime movers |
| US11867203B2 (en) | 2014-06-02 | 2024-01-09 | Project Phoenix, LLC | Linear actuator assembly and system |
| US11512695B2 (en) | 2014-07-22 | 2022-11-29 | Project Phoenix, LLC | External gear pump integrated with two independently driven prime movers |
| US11408442B2 (en) | 2014-09-23 | 2022-08-09 | Project Phoenix, LLC | System to pump fluid and control thereof |
| US11846283B2 (en) | 2015-09-02 | 2023-12-19 | Project Phoenix, LLC | System to pump fluid and control thereof |
| CN111283673A (en) * | 2020-02-17 | 2020-06-16 | 广东博智林机器人有限公司 | Hydraulic system and mechanical arm |
| TWI785667B (en) * | 2020-07-08 | 2022-12-01 | 美商鳳凰計劃股份有限公司 | Method of controlling motors of a pump and related apparatus and pump system |
| CN114030221A (en) * | 2021-11-24 | 2022-02-11 | 天水锻压机床(集团)有限公司 | Double-cylinder accurate constant-pressure fixed-stroke hydraulic variable-frequency servo control device |
| CN114876791A (en) * | 2022-06-02 | 2022-08-09 | 河南航天液压气动技术有限公司 | Flow intelligent calibration gear pump |
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| CB02 | Change of applicant information |
Address after: 215100 Building 5, 1269 Pujin Road, Mashe village, Xukou Town, Wuzhong District, Suzhou City, Jiangsu Province Applicant after: Suzhou Wohe Technology Co.,Ltd. Address before: 215100 Building 5, 1269 Pujin Road, Mashe village, Xukou Town, Wuzhong District, Suzhou City, Jiangsu Province Applicant before: SUZHOU WOHE FLUID CONTROL SYSTEM Co.,Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190521 |