CN107120323B - Bender bidirectional pump liquid pressure control system - Google Patents

Bender bidirectional pump liquid pressure control system Download PDF

Info

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
Application number
CN201710272653.9A
Other languages
Chinese (zh)
Other versions
CN107120323A (en
Inventor
简飞
Original Assignee
登派液压技术(上海)有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 登派液压技术(上海)有限公司 filed Critical 登派液压技术(上海)有限公司
Priority to CN201710272653.9A priority Critical patent/CN107120323B/en
Publication of CN107120323A publication Critical patent/CN107120323A/en
Application granted granted Critical
Publication of CN107120323B publication Critical patent/CN107120323B/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08Servomotor systems incorporating electrically operated control means

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

Bender bidirectional pump liquid pressure control system

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).
CN201710272653.9A 2017-04-24 2017-04-24 Bender bidirectional pump liquid pressure control system CN107120323B (en)

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 CN107120323B (en) 2017-04-24 2017-04-24 Bender bidirectional pump liquid pressure control system

Country Status (1)

Country Link
CN (1) CN107120323B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN107120323A (en) 2017-09-01

Similar Documents

Publication Publication Date Title
CN100424361C (en) Closed electrohydraulic controlling system
CN201669568U (en) Hydraulic energy-accumulation pressure maintaining system for fixture
CN103615436B (en) Steel tube straightening machine numerical control electrohydraulic ratio system
CN101865190B (en) Position and flow double-close-loop direct-drive volume control electro-hydraulic servo system
CN103047208A (en) Load-sensitive electro-hydraulic proportional multi-way valve
CN201580012U (en) Hydraulic control system for hydraulic press
CN201581382U (en) Electro-hydraulic proportional control piston type two-lifting-point hydraulic hoist
CN105150356B (en) The hydraulic control system and its full-automatic bidirectional pressurized hydraulic control method of a kind of brick machine
CN103148046B (en) A kind of direct-drive supercharged formula of AC servo three layers of piston electrohydraulic cylinder and boosting method
CN103307060B (en) The oil hydraulic cylinder control system of directly driving type servo-pump control electricity liquid combination drive and controlling method
CN102155476B (en) Regulating method of valve controlled regulating system without throttling loss based on PWM (pulse-width modulation)
CN101712207A (en) High performance and energy-saving double-acting hydrostatic press driven by servo motor
CN103807239A (en) Dual output shaft motor based shear plate synchronous control hydraulic system
CN202064326U (en) Synchronous split hydraulic hoist
CN204284032U (en) Single actuator automatic switchover rapid movement oil hydraulic circuit
CN105715597B (en) Constant backpressure Direct Drive Electro-hydraulic Servo System and its control method
CN103552276B (en) Slide block control system of hydraulic machine
CN105058554B (en) A kind of cylinder component and its full-automatic bidirectional pressurized hydraulic brick machine
CN102588358B (en) High-performance energy saving type electro-hydraulic servo control oil line
CN204942122U (en) Closed Hydraulic servo loading system, hydraulic pressure installation and loading equipemtn
CN202165337U (en) Hydraulic power system of energy-saving servo variable pump
CN104047912B (en) The digital pump controlled hydraulic differential cylinder in self-powered source
CN102513413B (en) Hydraulic control system for novel servo pump control bending machine
CN203384004U (en) Pneumatic water pump
CN1817611A (en) Injection machine system with electromechanical liquid composite control

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