CN107120323B - Bender bidirectional pump liquid pressure control system - Google Patents
Bender bidirectional pump liquid pressure control system Download PDFInfo
- Publication number
- CN107120323B CN107120323B CN201710272653.9A CN201710272653A CN107120323B CN 107120323 B CN107120323 B CN 107120323B CN 201710272653 A CN201710272653 A CN 201710272653A CN 107120323 B CN107120323 B CN 107120323B
- Authority
- CN
- China
- Prior art keywords
- valve
- way
- oil
- liang
- fuel tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Bender bidirectional pump liquid pressure control system of the present invention, belongs to bender technical field of hydraulic；The technical problem to be solved is that bender bidirectional pump liquid pressure control system is provided, using servo motor plus two-way pump, two hydraulic fluid ports of two-way pump are connected with the upper and lower cavity of hydraulic cylinder respectively, constitute control loop identical with valve control；Solve the technical solution that the technical problem uses for：Bender bidirectional pump liquid pressure control system, including servo motor, two-way pump and first liang of position and four-way reversing valve, servo motor is connect with two-way pump, pumping hole X2 is connect with first liang of position and four-way reversing valve, first liang of position and four-way reversing valve is connect with hydraulic cylinder and fuel tank, the connected oil circuits of pumping hole X1 are divided into two-way, the first via is connect with 2/2-way Solenoid ball valve, second tunnel is connect with second liang of position and four-way reversing valve, 2/2-way Solenoid ball valve is connect with hydraulic cylinder, hydraulic cylinder is also associated with prefill valve, prefill valve is connect with fuel tank, second liang of position and four-way reversing valve is connect with prefill valve and fuel tank.
Description
Technical field
Bender bidirectional pump liquid pressure control system of the present invention, belongs to bender technical field of hydraulic.
Background technology
With the development of control system and hydraulic technique, energy saving, efficient, noise reduction is proposed for traditional manufacture at this stage
Requirement；Currently, bender industry includes mainly being based on throttle grverning principle using the hydraulic synchronous control system of two cylinders control
Proportional valve control（Or other valve control systems）Hydraulic system and pump control system based on volume synchronous variable-speed principle（Including double
To pump or the pump control system of one-way hydraulic pump motor etc.）；Wherein, valve control system uses more.
Pump control system is at present also in continually developing or the perfect stage；Although what is occurred in the market is few in number
Bender pump control system, but either two-way pump control or the control of one-way hydraulic pump motor fails to push away comprehensively on the market
Extensively；To find out its cause, being on the one hand of high cost but most important or since its versatility is not high；Specifically, it is because of pump control
System cannot be with the electric-control system compatibility of current most of benders；Therefore, after the control mode by changing digital control system
Bender can be made to work normally.
Invention content
The invention overcomes the deficiencies of the prior art, and provides bender bidirectional pump liquid pressure control system, using watching
It takes motor and adds two-way pump, by hydraulic circuit, two hydraulic fluid ports of two-way pump are connected with the upper and lower cavity of hydraulic cylinder respectively, composition and valve
The identical control loop of control mode of control adapts to the universal of most of bender electric control system controls currently on the market
Pump control system.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：Bender bidirectional pump liquid pressure control system,
It is connect with two-way pump including servo motor, two-way pump and first liang of position and four-way reversing valve, the power output end of the servo motor,
The two-way pump includes pumping hole X1 and pumping hole X2, and the pumping hole X2 is connect with the working hole of first liang of position and four-way reversing valve, described
The rodless cavity connection of the oil inlet and hydraulic cylinder of first liang of position and four-way reversing valve, the oil return opening of first liang of position and four-way reversing valve
It is connect with fuel tank, the connected oil circuits of pumping hole X1 are divided into two-way, and the first via is connect with 2/2-way Solenoid ball valve, the second tunnel and the
The rod chamber of the oil inlet connection of two liang of position and four-way reversing valves, the 2/2-way Solenoid ball valve and hydraulic cylinder connects, the liquid
The rod chamber of cylinder pressure is also associated with the working hole of prefill valve, and the oil inlet of the prefill valve is connect with fuel tank, described the second two
The working hole of four-way reversing valve is connect with prefill valve, and the oil return opening of second liang of position and four-way reversing valve is connect with fuel tank.
The pumping hole X1 and pumping hole X2 are connect with fuel tank, and first is provided on the oil circuit between the pumping hole X1 and fuel tank
Oil-suction oil filter and the first check valve are provided with the second oil-suction oil filter and second on the oil circuit between the pumping hole X2 and fuel tank
Check valve.
It is provided with the first damping on second liang of oil circuit between position and four-way reversing valve and prefill valve.
Third check valve is provided on oil circuit between the 2/2-way Solenoid ball valve and pumping hole X1, the third is unidirectional
The direction of valve is identical as the ball valve direction of 2/2-way Solenoid ball valve.
Resistance overflow valve is parallel with where the third check valve on oil circuit, the resistance overflow valve has bar for hydraulic cylinder
Chamber provides resistance to pumping hole X1 oil returns.
Oil circuit where the 2/2-way Solenoid ball valve is parallel with work into overflow valve, and the work makes hydraulic cylinder into overflow valve
Downlink, the work are connected into overflow valve with resistance overflow valve piston at a slow speed, and the oil pressure relief of the work into overflow valve is more than resistance
Overflow valve.
The rod chamber of the hydraulic cylinder is connected with cavity of resorption overflow valve, and the cavity of resorption overflow valve is the peace of the rod chamber of hydraulic cylinder
Full valve.
It is provided with the second damping between the oil return opening and fuel tank of two position and four-way reversing valve.
The working hole of second liang of position and four-way reversing valve is connect with fuel tank, the work of second liang of position and four-way reversing valve
Third damping and safety overflow valve are provided on oil circuit between mouth and fuel tank.
It is provided with system safety overflow valve between the pumping hole X2 and fuel tank.
The present invention has the advantages that compared with prior art：
1, the present invention adds two-way pump on the basis of existing pump control hydraulic system using servo motor, by hydraulic circuit,
Two hydraulic fluid ports of two-way pump are connected with the upper and lower cavity of hydraulic cylinder respectively, constitute and the identical control of the control mode of valve control
Circuit, entirely appropriate for the bender electric-control system of previous proportional valve control, the bender of the control proportioning valve used in the past
Electric-control system is can to realize slider of bender by controlling the two-way pump control system of the present invention completely, under fast, work into,
The actions such as pressurize, off-load and backhaul.
2, the rotating speed of the invention by adjusting servo motor in real time, adjusts two-way pump oil drain quantity, controls hydraulic cylinder for bending machine
The speed of operation is finally reached sliding block and is accurately positioned；The bidirectional rotation of oil pump, i.e. forward or reverse correspond to proportional reversing valve
Left position or right position, when control be that both direction is adjustable, therefore the electric-control system for controlling proportioning valve can control this system, can
Adapt to the control of most of bender digital control systems at present.
3, the present invention is two sets of identical pumps control units, can be directly installed on the top of hydraulic cylinder respectively, system with
Hydraulic cylinder is connected directly, and can save the connection of intermediate duct, realizes that bender is connected without oil pipe, simple installation is easy.
4, the present invention is changed without several digital control systems more common to current bender, and versatility is stronger.
5, in this system it is oil drain quantity by adjusting two-way pump, adjusts the synchronism of two hydraulic cylinders of bender, relatively
In the bender of proportional valve control, no restriction loss, system heat generation amount is small, and in the interval of work, servo motor only exports lathe
The torque of very little, does not export rotating speed, has a rest in machine area, substantially the loss without electric energy.
Description of the drawings
Following further describes the present invention with reference to the drawings.
Fig. 1 is the structural diagram of the present invention.
In figure：1 be prefill valve, 2 be fuel tank, 3 be cavity of resorption overflow valve, 4 to be work be resistance overflow valve, 6 be into overflow valve, 5
2/2-way Solenoid ball valve, 7 be third check valve, 8 be the first damping, 9 be the first oil-suction oil filter, 10 be the first check valve,
11 it is servo motor, 12 be two-way pump, 13 be the second check valve, 14 be the second oil-suction oil filter, 15 be hydraulic cylinder, 16 is first
Two position and four-way reversing valves, 17 for the second damping, 18 are safety overflow valve, 19 are third damping, 20 are the second two four-way commutations
Valve, 21 are system safety overflow valve.
Specific implementation mode
As shown in Figure 1, bender bidirectional pump liquid pressure control system of the present invention, including servo motor 11, two-way pump 12 and
The power output end of one or two position and four-way reversing valve 16, the servo motor 11 is connect with two-way pump 12, and the two-way pump 12 includes
Pumping hole X1 and pumping hole X2, the pumping hole X2 are connect with the working hole of first liang of position and four-way reversing valve 16, the first two four-ways
The oil inlet of reversal valve 16 is connect with the rodless cavity of hydraulic cylinder 15, the oil return opening and fuel tank of first liang of position and four-way reversing valve 16
2 connections, the connected oil circuits of pumping hole X1 are divided into two-way, and the first via is connect with 2/2-way Solenoid ball valve 6, the second tunnel and second liang
The oil inlet of position and four-way reversing valve 20 connects, and the 2/2-way Solenoid ball valve 6 is connect with the rod chamber of hydraulic cylinder 15, the liquid
The rod chamber of cylinder pressure 15 is also associated with the working hole of prefill valve 1, and the oil inlet of the prefill valve 1 is connect with fuel tank 2, and described second
The working hole of two position and four-way reversing valves 20 is connect with prefill valve 1, oil return opening and the fuel tank 2 of second liang of position and four-way reversing valve 20
Connection.
The pumping hole X1 and pumping hole X2 are connect with fuel tank 2, and is provided on the oil circuit between the pumping hole X1 and fuel tank 2
One oil-suction oil filter 9 and the first check valve 10 are provided with the second oil-suction oil filter on the oil circuit between the pumping hole X2 and fuel tank 2
14 and second check valve 13.
It is provided with the first damping 8 on oil circuit between second liang of position and four-way reversing valve 20 and prefill valve 1.
Third check valve 7, the third list are provided on oil circuit between the 2/2-way Solenoid ball valve 6 and pumping hole X1
It is identical as the ball valve direction of 2/2-way Solenoid ball valve 6 to the direction of valve 7.
Resistance overflow valve 5 is parallel on 7 place oil circuit of the third check valve, the resistance overflow valve 5 is hydraulic cylinder 15
Rod chamber to pumping hole X1 oil returns provide resistance.
6 place oil circuit of the 2/2-way Solenoid ball valve is parallel with work into overflow valve 4, and the work makes hydraulic pressure into overflow valve 4
Downlink, the work are connected into overflow valve 4 with resistance overflow valve 5 piston of cylinder 15 at a slow speed, oil pressure relief of the work into overflow valve 4
More than resistance overflow valve 5.
The rod chamber of the hydraulic cylinder 15 is connected with cavity of resorption overflow valve 3, and the cavity of resorption overflow valve 3 has bar for hydraulic cylinder 15
The safety valve of chamber.
It is provided with the second damping 17 between the oil return opening and fuel tank 2 of two position and four-way reversing valve 16.
The working hole of second liang of position and four-way reversing valve 20 is connect with fuel tank 2, second liang of position and four-way reversing valve 20
Working hole and fuel tank 2 between oil circuit on be provided with third damping 19 and safety overflow valve 18.
It is provided with system safety overflow valve 21 between the pumping hole X2 and fuel tank 2.
Specific work process：
It is by the identical mould oscillating table design of two independent control principles due to the control of two hydraulic cylinders 15 of bender
Unit is realized jointly, and now with regard to being illustrated for the control principle of one of hydraulic cylinder 15, the control of another hydraulic cylinder 15 is former
Reason and description are identical with this.
Fast downlink acts：
YV1, YV3 obtain electric, and the hydraulic oil of the rod chamber of hydraulic cylinder 15 is through 6 right position of 2/2-way Solenoid ball valve, resistance overflow
Valve 5 enters to the pumping hole X2 of two-way pump 12；Sliding block drives the piston rapid decrease of hydraulic cylinder 15 under the effect of gravity, due to sliding block
Rapid decrease, closed type prefill valve 1 is opened, and the fluid of fuel tank 2 is inhaled into the rodless cavity of hydraulic cylinder 15 by prefill valve 1；
Digital control system gives servo motor 11 positive order simultaneously, and servo motor 11 drives two-way pump 12 to rotate forward oil suction, what two-way pump 12 sucked
Cavity of resorption fluid gets to pumping hole X2 through two-way pump 12, by first liang of 16 right position of position and four-way reversing valve, into hydraulic cylinder 15 without bar
Chamber pushes piston rod band movable slider to realize fast downlink.
Resistance overflow valve 5 provides certain resistance for fast downlink, prevent stall or it is fast under it is out of control；Sliding block descends speed that can lead to soon
The rotating speed speed of toning integer control systematic parameter control servomotor 11 and obtain.
Work is into action：
YV2, YV3 obtain electric, remaining valve dead electricity, YV1 dead electricity, and 2/2-way Solenoid ball valve 6 is closed, and digital control system continues to watching
Take 11 positive order of motor, 11 rotating speed of servo motor continuously decreases so that ram speed by fast downlink to tapering off, closed type
Prefill valve 1 is reset to closing, the rodless cavity closing of hydraulic cylinder 15 under the action of itself spring；Digital control system is to servo motor 11
Positive order, servo motor 11 drive 12 speed change of two-way pump to rotate forward, and two-way pump 12 is through pumping hole X1 and the first oil absorption filter 9 from fuel tank
Oil suction in 2, the fluid through pumping hole X2 discharges are pushed away through first liang of 16 right position of position and four-way reversing valve into the rodless cavity of hydraulic cylinder 15
Piston bar downlink, the oil liquid pressure of the rod chamber of hydraulic cylinder 15 reach work into the Opening pressure of overflow valve 4, by work into overflow valve
4 open, and fluid flows to pumping hole X1 through resistance overflow valve 5, the nothing of hydraulic cylinder 15 is eventually entered into pumping hole X2 through two-way pump 12
Rod cavity, to realize the downlink at a slow speed i.e. work of sliding block into.
Cavity of resorption overflow valve 3 is the safety valve of cavity of resorption, prevents the rod chamber hypertonia of hydraulic cylinder 15；Sliding block work speed can
Friction speed is obtained by adjusting the rotating speed of digital control system state modulator servo motor 11.
Pressurize acts：
YV2, YV3 continue electric, and digital control system is just referring to according to the deviation of torque setting value and actual value to servo motor 11
It enables, servo motor 11 drives two-way pump 12 to slowly run, and keeps the rodless cavity pressure of hydraulic cylinder 15 constant so that sliding block is parked in
Desired value carries out pressurize.
Off-load acts：
YV2, YV3 continue electric, and digital control system gives servo motor 11 negative instruction, and servo motor 11 drives two-way pump 12 to become
Speed reversion, the high-voltage oil liquid of 15 rodless cavity of hydraulic cylinder is gradually extracted out through pumping hole X2 and first liang of 16 right position of position and four-way reversing valve,
Into pumping hole X1, a part of fluid progresses into hydraulic cylinder 15 through 2/2-way Solenoid ball valve 6, and piston rod is pushed slowly to rise,
A part of extra fluid enters fuel tank 2 through second liang of 20 right position of position and four-way reversing valve and safety overflow valve 18, from T2 mouthfuls, in this way
So that 15 piston of hydraulic cylinder slowly rises the distance of a very little, the extra fluid of another part is overflow by safety overflow valve 18
Fuel tank 2 is flowed back to, so that the pressure of rod chamber is not increased very much, system unloaded terminates；Digital control system can by adjust off-load away from
From or unloading time, complete hydraulic cylinder 15 off-load, off-load action prepare for return.
Return acts：
All equal dead electricity of solenoid valve, since YV3 is powered off, the pressure oil of the rodless cavity remaining of hydraulic cylinder 15 is through the first two four
Position in logical reversal valve 16, the second damping 17 return to fuel tank 2 from T2, release are further carried out to system.
Digital control system gives servo motor 11 negative instruction later, and servo motor 11 drives two-way pump 12 to invert, two-way pump 12
From pumping hole X2 oil suctions, from pumping hole X1 oil extractions, the fluid of discharge is all the way through position in second liang of position and four-way reversing valve 20 and the first damping 8
Into the control chamber of prefill valve 1, prefill valve 1 is opened, the fluid of the rodless cavity of hydraulic cylinder 15 is largely returned to by prefill valve 1
Fuel tank 2 returns to fuel tank 2 at least partially through first liang of position and four-way reversing valve 16；Another way fluid passes through third check valve 7 and two
Two logical Solenoid ball valves 6 enter the rod chamber of hydraulic cylinder 15, the quick upward return of piston rod；Opening speed can pass through digital control system tune
It saves the rotating speed of servo motor 11 and obtains friction speed.
Vertical motion at a slow speed：
YV2 obtains electric, remaining electromagnet dead electricity, and the fluid of the rodless cavity of hydraulic cylinder 15 is returned through first liang of position and four-way reversing valve 16
To fuel tank 2；Digital control system gives servo motor 11 negative instruction, servo motor 11 drive two-way pump 12 invert at a slow speed, two-way pump 12 from
Fuel tank 2 is through the second oil-suction oil filter 14 and the second check valve 13, and through pumping hole X2 oil suctions, from pumping hole X1 oil extractions, the fluid of discharge is logical
Cross the rod chamber that third check valve 7 and 2/2-way Solenoid ball valve 6 enter hydraulic cylinder 15, extra fluid is by the second two four
Logical reversal valve 20, third damping 19 and safety overflow valve 18, enter fuel tank 2, piston rod moves up at a slow speed from T2 mouthfuls；Slow upper speed
Degree can obtain different speed by adjusting the rotating speed of servo motor 11.
Two independent hydraulic control units that the present invention is made of two servo motors 11 and two-way pump 12, control respectively
The essence to sliding block is realized in the synchronous operation of two hydraulic cylinders 15 with digital control system, the grating scale of position detection or magnetic railings ruler jointly
Determine position.
It is extra since 15 rod chamber of hydraulic cylinder is different with rodless cavity area in off-load and ascent stage at a slow speed in the present invention
Fluid through second liang of position and four-way reversing valve 20, third damping 19 and 18 oil return box 2 of safety overflow valve, realize bender piston rod
Rising at a slow speed or unloading way and circuit, it can also be used to it is other to be identical with this or flexible hydraulic control circuit, be accordingly to be regarded as this
Invention right.
The control loop of a hydraulic cylinder 15 of the invention is a hydraulic pressure unit, and the present invention is common using two servo units
Use, other be used alone the present invention a set of servo-hydraulic units control hydraulic system or simultaneously use two sets or two sets with
The hydraulic system of the servo-hydraulic unit control of the upper present invention, within scope of the invention as claimed.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Example, within the knowledge of a person skilled in the art, can also make without departing from the purpose of the present invention
Go out various change.
Claims (7)
1. bender bidirectional pump liquid pressure control system, it is characterised in that：Including servo motor（11）, two-way pump（12）With first liang
Position and four-way reversing valve（16）, the servo motor（11）Power output end and two-way pump（12）Connection, the two-way pump（12）
Including pumping hole X1 and pumping hole X2, the pumping hole X2 and first liang of position and four-way reversing valve（16）Working hole connection, described first liang
Position and four-way reversing valve（16）Oil inlet and hydraulic cylinder（15）Rodless cavity connection, first liang of position and four-way reversing valve（16）'s
Oil return opening and fuel tank（2）Connection, the connected oil circuits of pumping hole X1 are divided into two-way, the first via and 2/2-way Solenoid ball valve（6）Even
It connects, the second tunnel and second liang of position and four-way reversing valve（20）Oil inlet connection, the 2/2-way Solenoid ball valve（6）With hydraulic cylinder
（15）Rod chamber connection, the hydraulic cylinder（15）Rod chamber be also associated with prefill valve（1）Working hole, the prefill valve
（1）Oil inlet and fuel tank（2）Connection, second liang of position and four-way reversing valve（20）Working hole and prefill valve（1）Connection, institute
State second liang of position and four-way reversing valve（20）Oil return opening and fuel tank（2）Connection；
The 2/2-way Solenoid ball valve（6）Third check valve is provided on oil circuit between pumping hole X1（7）, the third list
To valve（7）Direction and 2/2-way Solenoid ball valve（6）Ball valve direction it is identical, the third check valve（7）On the oil circuit of place
It is parallel with resistance overflow valve（5）, the resistance overflow valve（5）For hydraulic cylinder（15）Rod chamber to pumping hole X1 oil returns provide resistance
Power；
Second liang of position and four-way reversing valve（20）Working hole and fuel tank（2）Connection, second liang of position and four-way reversing valve
（20）Working hole and fuel tank（2）Between oil circuit on be provided with third damping（19）And safety overflow valve（18）.
2. bender bidirectional pump liquid pressure control system according to claim 1, it is characterised in that：The pumping hole X1 and pumping hole
X2 is and fuel tank（2）Connection, the pumping hole X1 and fuel tank（2）Between oil circuit on be provided with the first oil-suction oil filter（9）With
One check valve（10）, the pumping hole X2 and fuel tank（2）Between oil circuit on be provided with the second oil-suction oil filter（14）It is single with second
To valve（13）.
3. bender bidirectional pump liquid pressure control system according to claim 1, it is characterised in that：The second two four-ways
Reversal valve（20）With prefill valve（1）Between oil circuit on be provided with the first damping（8）.
4. bender bidirectional pump liquid pressure control system according to claim 1, it is characterised in that：The 2/2-way electromagnetism
Ball valve（6）Place oil circuit is parallel with work into overflow valve（4）, the work is into overflow valve（4）Make hydraulic cylinder（15）Piston at a slow speed under
Row, the work is into overflow valve（4）With resistance overflow valve（5）Connection, the work is into overflow valve（4）Oil pressure relief more than resistance overflow
Flow valve（5）.
5. bender bidirectional pump liquid pressure control system according to claim 1, it is characterised in that：The hydraulic cylinder（15）'s
Rod chamber is connected with cavity of resorption overflow valve（3）, the cavity of resorption overflow valve（3）For hydraulic cylinder（15）Rod chamber safety valve.
6. bender bidirectional pump liquid pressure control system according to claim 1, it is characterised in that：Two four-ways commutation
Valve（16）Oil return opening and fuel tank（2）Between be provided with the second damping（17）.
7. bender bidirectional pump liquid pressure control system according to claim 1, it is characterised in that：The pumping hole X2 and fuel tank
（2）Between be provided with system safety overflow valve（21）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272653.9A CN107120323B (en) | 2017-04-24 | 2017-04-24 | Bender bidirectional pump liquid pressure control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272653.9A CN107120323B (en) | 2017-04-24 | 2017-04-24 | Bender bidirectional pump liquid pressure control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107120323A CN107120323A (en) | 2017-09-01 |
| CN107120323B true CN107120323B (en) | 2018-10-26 |
Family
ID=59725787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710272653.9A Active CN107120323B (en) | 2017-04-24 | 2017-04-24 | Bender bidirectional pump liquid pressure control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107120323B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469655B (en) * | 2018-11-27 | 2023-08-22 | 东华机械有限公司 | Quick movement device for oil cylinder and control mode |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100240224B1 (en) * | 1997-06-27 | 2000-01-15 | 이해규 | Method device of tube bending |
| CN102183918B (en) * | 2011-03-11 | 2012-08-22 | 无锡锡锻机床有限公司 | Control system for servo numerical control bending machine |
| CN102513413B (en) * | 2011-12-03 | 2013-11-06 | 南京埃尔法电液技术有限公司 | Hydraulic control system for novel servo pump control bending machine |
| CN202316710U (en) * | 2011-12-08 | 2012-07-11 | 东莞大同数控机械有限公司 | Servo hydraulic hybrid bender hydraulic system |
| CN105240329A (en) * | 2015-11-02 | 2016-01-13 | 山东富力世新型材料有限公司 | Servo pump control hydraulic system |
| CN206723172U (en) * | 2017-04-24 | 2017-12-08 | 登派液压技术（上海）有限公司 | Bender bidirectional pump liquid pressure control system |
-
2017
- 2017-04-24 CN CN201710272653.9A patent/CN107120323B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107120323A (en) | 2017-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106402060B (en) | Directly driven volume controlled electro-hydraulic servo hydraulic system of hydraulic machine | |
| CN102513413B (en) | Hydraulic control system for novel servo pump control bending machine | |
| CN102588358B (en) | High-performance energy saving type electro-hydraulic servo control oil line | |
| CN102155476B (en) | Regulating method of valve controlled regulating system without throttling loss based on PWM (pulse-width modulation) | |
| CN101865190A (en) | Position and flow double-close-loop direct-drive volume control electro-hydraulic servo system | |
| CN101571155A (en) | Digital electric-hydraulic synchronous control system | |
| CN104632794A (en) | Electro-hydraulic servo system of direct drive type hydraulic hoist | |
| CN109779985A (en) | Gear pump control hydraulic control system of bender and its control method | |
| CN100553934C (en) | The injection machine system of the compound control of mechanical electronic hydraulic | |
| CN103552276A (en) | Slide block control system of hydraulic machine | |
| CN108506286A (en) | A kind of driving motor directly drives the hydraulic energy-saving system of pump control cylinder with differential effect | |
| CN108386398A (en) | A kind of compound hydraulic cylinder position control pump control hydraulic system | |
| CN201396344Y (en) | Digital electro-hydraulic isochronous control system | |
| CN204267432U (en) | Steel pipe finishing machine electric-hydraulic proportion hydraulic control system | |
| CN206723172U (en) | Bender bidirectional pump liquid pressure control system | |
| CN107120324B (en) | Gear pump control hydraulic control system of bender | |
| CN107120323B (en) | Bender bidirectional pump liquid pressure control system | |
| CN211116877U (en) | Integrated bidirectional pump-controlled high-speed double-cylinder synchronous hydraulic control system | |
| CN205918969U (en) | Gear pump control formula electro -hydraulic linkage actuating mechanism | |
| CN202356469U (en) | Novel hydraulic control system of servo pump-controlled bending machine | |
| CN108252967A (en) | A kind of Hydraulic system and control method for being used to control energy-saving pump | |
| CN208634147U (en) | A kind of driving motor directly drives the hydraulic energy-saving system of pump control cylinder with differential effect | |
| CN206723171U (en) | Gear pump control hydraulic control system of bender | |
| CN201322013Y (en) | Hydraulic system of bus bending machine | |
| CN207161416U (en) | Hydraulic oil cylinder driving system for closed type hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |