CN109630504A - A kind of pressure compensated oil inlet and outlet autonomous control system of band - Google Patents

A kind of pressure compensated oil inlet and outlet autonomous control system of band Download PDF

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Publication number
CN109630504A
CN109630504A CN201811601434.1A CN201811601434A CN109630504A CN 109630504 A CN109630504 A CN 109630504A CN 201811601434 A CN201811601434 A CN 201811601434A CN 109630504 A CN109630504 A CN 109630504A
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CN
China
Prior art keywords
valve
pressure
hydraulic
outlet
control
Prior art date
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CN201811601434.1A
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Chinese (zh)
Inventor
权龙�
王波
刘赫
夏连鹏
杨敬
王鹤
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太原理工大学
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Priority to CN201811601434.1A priority Critical patent/CN109630504A/en
Publication of CN109630504A publication Critical patent/CN109630504A/en

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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
    • 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
    • F15B21/087Control strategy, e.g. with block diagram
    • 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
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • 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
    • F15B19/00Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • 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
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F15B2013/0448Actuation by solenoid and permanent magnet

Abstract

The present invention provides a kind of pressure compensated oil inlet and outlet autonomous control system of band, comprising: hydraulic power supply (1), overflow valve (2), inlet and outlet independent control valve group (3), hydraulic actuator (5);It is characterized by: further having additional load selector valve (4), novel electron pressure-compensated valve (6) or electro-hydraulic pressure recuperation valve (7), improve the handling of multi executors oil inlet and outlet autonomous system, simplify the control complexity that system is balanced multi executors load variations, system cost can also be reduced simultaneously, realizes the real-time continuous regulation of compensating differential pressure and the monitoring of compensating spool real time position feedback.The pressure compensated oil inlet and outlet autonomous control system of a kind of band disclosed by the invention has many advantages, such as that control is simple, intelligence degree is high, operating condition strong applicability, low energy consumption, response is fast.

Description

A kind of pressure compensated oil inlet and outlet autonomous control system of band

Technical field

The invention belongs to construction machinery hydraulic systems, and in particular to a kind of inlet and outlet independent control with pressure-compensated valve System.

Background technique

Existing engineering machinery is all made of the speed of service of traditional multi-way valve control actuator, four Bian Liandong of hydraulic valve, disengaging Mouth throttles simultaneously, and synchronization can only control the pressure or flow of actuator single-chamber, and poor controllability, there are restriction losses greatly, hair The problems such as heat is serious, especially under Exceed load operating condition, this problem is even more serious.

Traditional four side of multi-way valve link throttling control there are aiming at the problem that, existing solution is independent using inlet and outlet The method of control, using two three-position three-way valves or four two position two-way valves control respectively two chamber of hydraulic actuator pressure and Flow increases control freedom degree, reduces system pressure loss and energy consumption.But for excavator this kind single-power The engineering machinery of source parallel drive multi executors, when multiple actuator composite moves, to keep good handling, reduction is respectively held Row device load pressure influences, and so that each actuator flow is distributed according to need, needs using multiple sensors, while acquiring multiple actuators The multiple reversal valves of pressure/flow state modulator, control strategy is extremely complex, and system cost is high.

Summary of the invention

To solve the above-mentioned problems, the present invention is intended to provide a kind of pressure compensated oil inlet and outlet autonomous control system of band, Simplify multi executors composite move and import and export independent control strategy, reduce system cost, while again with high assignment of traffic essence Degree and extensive operating condition applicability.

To achieve the above object, the invention adopts the following technical scheme: a kind of pressure compensated oil inlet and outlet of band is independently controlled System processed, comprising: hydraulic power supply (1), overflow valve (2), inlet and outlet independent control valve group (3), hydraulic actuator (5);It is special Sign is: further including load selector valve (4), electron pressure recuperation valve (6) or electro-hydraulic pressure recuperation valve (7), which kind of is specifically used Pressure-compensated valve is determined by system load pressure and flow;

The electron pressure recuperation valve is the pressure-compensated valve of proportion electro-magnet control or the pressure of linear motor control Recuperation valve or the pressure-compensated valve of rotating electric machine driving ball-screw control, electron pressure recuperation valve are proportion electro-magnet control It include displacement sensor (12), proportion electro-magnet (13), compensation valve body (14), compensating spool (15), bullet when pressure-compensated valve Spring (16), oil inlet (A), oil outlet (B), the Ith control chamber (PF) and the IIth control chamber (PE);Compensating spool is arranged in recuperation valve Among body, spring one end is acted on the C of compensating spool left side, and the other end acts on compensation valve body and compensating spool is formed Ith control chamber PF, proportion electro-magnet connect, acts on the D of compensating spool right side with compensation valve body, and with compensating spool, benefit It repays valve body and forms the IIth control chamber PE, displacement sensor and proportion electro-magnet integrated installation;

When the electron pressure recuperation valve is the pressure-compensated valve of linear motor control, including displacement sensor, compensation Valve body, compensating spool, spring, linear motor (17), oil inlet (A), oil outlet (B), the Ith control chamber (PF) and the IIth control chamber (PE);Compensating spool is arranged among compensation valve body, and spring one end acts on the C of compensating spool left side, and the other end acts on It compensates on valve body and forms the Ith control chamber P with compensating spoolF, displacement sensor by compensate valve body be installed in compensating spool On, the position X and speed XV of spool are directly detected, linear motor connect with compensation valve body, is installed in compensating spool right side D On, and the IIth control chamber P is formed with compensation valve body, compensating spoolE

When the electron pressure recuperation valve is the pressure-compensated valve of rotating electric machine driving ball-screw control, including displacement Sensor, compensating spool, spring, rotating electric machine (18), ball-screw (19), connecting rod (20), oil inlet (A), goes out compensation valve body Hydraulic fluid port (B), the Ith control chamber (PF) and the IIth control chamber (PE);Compensating spool is arranged among compensation valve body, spring one end effect On the C of compensating spool left side, the other end acts on compensation valve body and forms the Ith control chamber P with compensating spoolF, displacement biography Sensor is installed on compensating spool by compensating valve body, directly detects the position X and speed XV, rotating electric machine and recuperation valve of spool Body connection simultaneously forms the IIth control chamber P with compensation valve body, compensating spoolE, the screw rod company of rotating electric machine projecting shaft and ball-screw It connects, the nut of ball-screw is connect with connecting rod, and rotating electric machine drives ball-screw rotation, by ball-screw by the rotation of motor Movement is converted to linear motion, so that drive link exports different power and displacement;

The electro-hydraulic pressure recuperation valve include displacement sensor, compensation valve body, compensating spool, spring, oil inlet (A), Oil outlet (B), the Ith control chamber (PF), the IIth control chamber (PE) and the IIIth control chamber (PG);Compensating spool is arranged in compensation valve body Among, spring one end acts on the C of compensating spool left side, and the other end is acted on compensation valve body and formed with compensating spool Ith control chamber PF, displacement sensor by compensate valve body be installed on compensating spool, directly detection spool position X and speed XV, the compensating spool other end form the IIth control chamber P with recuperation valve body respectivelyEWith the IIIth control chamber PG

When using electro-hydraulic pressure recuperation valve, system also includes guide's oil circuit (21) and guide proportion pressure reducing valve (22), The output oil port of guide proportion pressure reducing valve and the IIIth control chamber P of electro-hydraulic pressure recuperation valveGConnection, guide proportion pressure reducing valve It is connected to respectively with guide's oil circuit and fuel tank into and out of hydraulic fluid port;

Importing and exporting independent control valve group is by the Ith bi-bit bi-pass proportional reversing valve (8), the IIth bi-bit bi-pass proportional reversing valve (9), the IIIth bi-bit bi-pass proportional reversing valve (10) and the IVth bi-bit bi-pass proportional reversing valve (11) are constituted;

The oil inlet A of electron pressure recuperation valve or electro-hydraulic pressure recuperation valve is connected to the oil outlet of hydraulic power supply, electronics The IIth control chamber P of the oil outlet B and pressure-compensated valve of pressure-compensated valve or electro-hydraulic pressure recuperation valveE, the IIth bi-bit bi-pass ratio The hydraulic fluid port C of example reversal valveWith the hydraulic fluid port C of the IIIth bi-bit bi-pass proportional reversing valveConnection, the Ith bi-bit bi-pass proportional reversing valve Hydraulic fluid port CWith the hydraulic fluid port C of the IVth bi-bit bi-pass proportional reversing valveIt is connected to respectively with fuel tank, the commutation of the I, the IIth bi-bit bi-pass ratio The hydraulic fluid port D of valve、DPass through oil circuit L1 and hydraulic actuator control chamber pAConnection, the III, the IVth bi-bit bi-pass proportional reversing valve Hydraulic fluid port D、DPass through oil circuit L2 and hydraulic actuator control chamber pAConnection, load selector valve hydraulic fluid port E, F respectively with oil circuit L1, L2 Connection, load selector valve hydraulic fluid port G and the Ith control chamber P of pressure-compensated valveFConnection passes through the operating position of control load selector valve It may be selected actuator pAOr pBOil liquid introduce the Ith control chamber P of pressure-compensated valveFIt controls it;

Alternatively, inlet and outlet independent control valve group is by the Ith three position three-way change valve (23) and the IIth three position three-way change valve (24) it constitutes;The oil inlet A of electron pressure recuperation valve or electro-hydraulic pressure recuperation valve is connected to the oil outlet of hydraulic power supply, electronics The oil outlet B of the pressure-compensated valve or electro-hydraulic pressure recuperation valve oil inlet P with the Ith three position three-way change valve respectivelyWith the IIth 3 The oil inlet P of position three-way diverter valveConnection, the oil outlet T of the Ith three position three-way change valveAnd the IIth three position three-way change valve Oil outlet TIt is connected to respectively with fuel tank, the actuator port H of the Ith three position three-way change valveWith the work of the IIth three position three-way change valve Make hydraulic fluid port HPass through pipeline L1, L2 and two chamber p of hydraulic actuator respectivelyA、pBConnection, load selector valve hydraulic fluid port E, F respectively with oil circuit L1, L2 connection, load selector valve hydraulic fluid port G and the Ith control chamber P of pressure-compensated valveFConnection.

The electron pressure recuperation valve and electro-hydraulic pressure recuperation valve is one of open in usual and normally closed type.

The electron pressure recuperation valve and electro-hydraulic pressure recuperation valve can also be arranged in inlet and outlet independent control valve group it Afterwards.

The displacement sensor is integrated on proportion electro-magnet, detects spool position by detection ratio electromagnet X and speed XV, or be installed on compensating spool, directly detect the position X and speed XV of spool.

The proportion electro-magnet is one of unidirectional proportion electro-magnet and two-way proportional solenoid.

The rotating electric machine is one of direct current generator, synchronous motor and asynchronous machine.

The hydraulic pump of the hydraulic power supply can be mechanical load sensitive pump, electrical proportional pressure pump and electronics ratio One kind of example variable-displacement pump, drives the power source of hydraulic pump to can be the threephase asynchronous machine of permanent revolving speed, can be AC servo Motor can be switched reluctance machines, be also possible to internal combustion engine.

The hydraulic actuator can be one of asymmetric servo cylinder, double outlet-rod hydraulic cylinders and hydraulic motor.

Further, system can also have multiple hydraulic actuators simultaneously, and multiple oil inlet and outlet independent control valve groups are multiple The combination of electron pressure recuperation valve or electro-hydraulic pressure recuperation valve or two kinds of pressure-compensated valves, and only one is hydraulic dynamic for system Power source.

Compared with prior art, the invention has the following advantages:

The present invention is additionally arranged electron pressure recuperation valve or electro-hydraulic pressure compensation in traditional oil inlet and outlet autonomous control system Valve improves the handling of multi executors oil inlet and outlet autonomous system, and the system that simplifies is balanced multi executors load variations Control complexity, while the use of pressure sensor can be also reduced, reduce system cost.

The present invention devises novel electron pressure-compensated valve and electro-hydraulic pressure recuperation valve, using electronics or electrohydraulic control unit Change recuperation valve and control pressure difference, realize the real-time continuous regulation of recuperation valve compensating differential pressure, is supervised using displacement sensor Real-time Feedback Compensating spool position is surveyed, overcomes that conventional pressure recuperation valve compensating spool is uncontrollable, immesurable problem, realizes pressure compensation The intelligentized control method of valve lays the foundation further to implement Advanced Control Techniques.

The present invention has stronger advanced technology, applicable different type of machines and operating condition, based on duty requirements matching compensation Pressure difference when accurate operation, reduces compensating differential pressure, reduces valve port flow gain, improves manipulation stability;When quick acting, improve Recuperation valve compensating differential pressure increases valve port flow gain, realizes actuator quick response and efficient operation.

Detailed description of the invention

Fig. 1 is the systematic schematic diagram of the specific embodiment of the invention 1;

Fig. 2 is the first structure schematic diagram of electron pressure recuperation valve of the present invention;

Fig. 3 is the second structure principle chart of electron pressure recuperation valve of the present invention;

Fig. 4 is the third structure principle chart of electron pressure recuperation valve of the present invention;

Fig. 5 is the systematic schematic diagram of the specific embodiment of the invention 2;

Fig. 6 is the structure principle chart of electro-hydraulic pressure recuperation valve of the present invention;

Fig. 7 is the systematic schematic diagram of the specific embodiment of the invention 3.

In figure: 1- hydraulic power supply, 2- overflow valve, 3- oil inlet and outlet independent control valve group, 4- load selector valve, and 5- is hydraulic Actuator, 6- electron pressure recuperation valve, 7- electro-hydraulic pressure recuperation valve, the Ith bi-bit bi-pass proportional reversing valve of 8-, 9- the IIth 2 two Logical proportional reversing valve, the IIIth bi-bit bi-pass proportional reversing valve of 10-, the IVth bi-bit bi-pass proportional reversing valve of 11-, 12- displacement sensing Device, 13- proportion electro-magnet, 14- compensate valve body, 15- compensating spool, 16- spring, 17- linear motor, 18- rotating electric machine, 19- Ball-screw, 20- connecting rod, 21- guide's oil circuit, 22- guide proportion pressure reducing valve, the Ith three position three-way change valve of 23-, 24- the IIth 3 Position three-way diverter valve.

Specific embodiment

1~7 couple of present invention is described in further details with reference to the accompanying drawing.

Embodiment 1

A kind of pressure compensated oil inlet and outlet autonomous control system of band, comprising: hydraulic power supply 1, overflow valve 2, inlet and outlet Independent control valve group 3, hydraulic actuator 5;It is characterized by also including load selector valve 4, electron pressure recuperation valves 6;

As shown in Figure 1, inlet and outlet independent control valve group 3 is by the Ith bi-bit bi-pass proportional reversing valve 8, the IIth bi-bit bi-pass Proportional reversing valve 9, the IIIth bi-bit bi-pass proportional reversing valve 10 and the IVth bi-bit bi-pass proportional reversing valve 11 are constituted;

The oil inlet A of electron pressure recuperation valve 6 is connected to the oil outlet of hydraulic power supply 1, and electron pressure recuperation valve 6 goes out The IIth control chamber P of hydraulic fluid port B and electron pressure recuperation valve 6E, the IIth bi-bit bi-pass proportional reversing valve 9 hydraulic fluid port CWith the IIIth 2 The hydraulic fluid port C of position two-way proportional reversing valve 10Connection, the hydraulic fluid port C of the Ith bi-bit bi-pass proportional reversing valve 8With the IVth bi-bit bi-pass ratio The hydraulic fluid port C of example reversal valve 11It is connected to respectively with fuel tank, the Ith bi-bit bi-pass proportional reversing valve 8, the commutation of the IIth bi-bit bi-pass ratio The hydraulic fluid port D of valve 9、DPass through oil circuit L1 and 5 control chamber p of hydraulic actuatorAConnection, the IIIth bi-bit bi-pass proportional reversing valve 10, the The hydraulic fluid port D of IV bi-bit bi-pass proportional reversing valve 11、DPass through oil circuit L2 and 5 control chamber p of hydraulic actuatorAConnection, load selection Valve 4 hydraulic fluid port E, F are connected to oil circuit L1, L2 respectively, load 4 hydraulic fluid port G of selector valve and the Ith control chamber P of electron pressure recuperation valve 6FEven It is logical, it may be selected by the operating position of control load selector valve 4 by actuator pAOr pBOil liquid introduce electron pressure recuperation valve 6 Ith control chamber PFIt controls it;

The electron pressure recuperation valve 6 is the pressure-compensated valve of proportion electro-magnet control or the pressure of linear motor control Recuperation valve or the pressure-compensated valve of rotating electric machine driving ball-screw control, as shown in Fig. 2, electron pressure recuperation valve 6 is ratio It include displacement sensor 12, proportion electro-magnet 13, compensation valve body 14, recuperation valve when the pressure-compensated valve that electromagnet 13 controls Core 15, spring 16, oil inlet A, oil outlet B, the Ith control chamber PFWith the IIth control chamber PE;Compensating spool 15 is arranged in compensation valve body Among 14,16 one end of spring is acted on 15 left side C of compensating spool, and the other end acts on compensation valve body 14 and recuperation valve Core 15 forms the Ith control chamber PF, proportion electro-magnet 13 connect, acts on 15 right side D of compensating spool with compensation valve body 14, and The IIth control chamber P is formed with compensating spool 15, compensation valve body 14E, displacement sensor 12 and 13 integrated installation of proportion electro-magnet;

As shown in figure 3, when the electron pressure recuperation valve 6 is the pressure-compensated valve that linear motor 17 controls, including position Displacement sensor 12, compensation valve body 14, compensating spool 15, spring 16, linear motor 17, oil inlet A, oil outlet B, the Ith control chamber PFWith the IIth control chamber PE;Compensating spool 15 is arranged among compensation valve body 14, and 16 one end of spring acts on 15 left end of compensating spool On the C of face, the other end acts on compensation valve body 14 and forms the Ith control chamber P with compensating spool 15F, displacement sensor 12 passes through Compensation valve body 14 is installed on compensating spool 15, directly detects the position X and speed XV of spool 15, linear motor 17 and recuperation valve The connection of body 14 is installed on 15 right side D of compensating spool, and forms the IIth control chamber P with compensation valve body 14, compensating spool 15E

As shown in figure 4, the electron pressure recuperation valve 6 is that the pressure that rotating electric machine 18 drives ball-screw 19 to control is mended When repaying valve, including displacement sensor 12, compensation valve body 14, compensating spool 15, spring 16, rotating electric machine 18, ball-screw 19, company Bar 20, oil inlet A, oil outlet B, the Ith control chamber PFWith the IIth control chamber PE;Compensating spool 14 is arranged among compensation valve body 15, 16 one end of spring acts on 15 left side C of compensating spool, the other end act on compensation valve body 14 on and with 15 shape of compensating spool At the Ith control chamber PF, displacement sensor 12 by compensate valve body 14 be installed on compensating spool 15, directly detection spool 15 position X and speed XV are set, rotating electric machine 18 connect with compensation valve body 14 and forms the IIth control with compensation valve body 14, compensating spool 15 Chamber PE, 18 projecting shaft of rotating electric machine connect with the screw rod of ball-screw 19, and the nut of ball-screw 19 is connect with connecting rod, electric rotating Machine 18 drives ball-screw 19 to rotate, and the rotary motion of motor is converted to linear motion by ball-screw 19, to drive Connecting rod 20 exports different power and displacement;

The electron pressure recuperation valve 6 is one of open in usual and normally closed type.

The electron pressure recuperation valve 6 can also be arranged in after inlet and outlet independent control valve group 3.

The displacement sensor 12 is integrated on proportion electro-magnet 13, detects valve by detection ratio electromagnet 13 Core position X and speed XV, or be installed on compensating spool 15, directly detect the position X and speed XV of spool.

The proportion electro-magnet 13 is one of unidirectional proportion electro-magnet and two-way proportional solenoid.

The rotating electric machine 18 is one of direct current generator, synchronous motor and asynchronous machine.

The hydraulic pump of the hydraulic power supply 1 can be mechanical load sensitive pump, electrical proportional pressure pump and electronics One kind of ratio variable-displacement pump drives the power source of hydraulic pump to can be the threephase asynchronous machine of permanent revolving speed, can be exchange and watches Motor is taken, can be switched reluctance machines, is also possible to internal combustion engine.

The hydraulic actuator 5 can be one of asymmetric servo cylinder, double outlet-rod hydraulic cylinders and hydraulic motor.

Further, system can also have multiple hydraulic actuators 5 simultaneously, and multiple oil inlet and outlet independent control valve groups 3 are more A electron pressure recuperation valve 6, and system only one hydraulic power supply 1.

Embodiment 2

As shown in figure 5, a kind of second of embodiment of the pressure compensated oil inlet and outlet autonomous control system of band of the present invention, The difference from embodiment 1 is that: including electro-hydraulic pressure recuperation valve 7, the hydraulic pump of the hydraulic power supply 1 is mechanically to load Sensitive pump;

Mechanically the LS oil circuit of load sensitive pump while the Ith control chamber P with electro-hydraulic pressure recuperation valve 7F, load selector valve 4 hydraulic fluid port G connection.The oil inlet A of electro-hydraulic pressure recuperation valve 7 is connected to the oil outlet of hydraulic power supply 1, electro-hydraulic pressure recuperation valve 7 oil outlet B and the IIth control chamber P of electro-hydraulic pressure recuperation valve 7E, the IIth bi-bit bi-pass proportional reversing valve 9 hydraulic fluid port CWith The hydraulic fluid port C of III bi-bit bi-pass proportional reversing valve 10Connection, the hydraulic fluid port C of the Ith bi-bit bi-pass proportional reversing valve 8With the IVth 2 two The hydraulic fluid port C of logical proportional reversing valve 11It is connected to respectively with fuel tank, the Ith bi-bit bi-pass proportional reversing valve 8, the IIth bi-bit bi-pass ratio The hydraulic fluid port D of reversal valve 9、DPass through oil circuit L1 and 5 control chamber p of hydraulic actuatorAConnection, the IIIth bi-bit bi-pass proportional reversing valve 10, the hydraulic fluid port D of the IVth bi-bit bi-pass proportional reversing valve 11、DPass through oil circuit L2 and 5 control chamber p of hydraulic actuatorAConnection is born It carries selector valve 4 hydraulic fluid port E, F to be connected to oil circuit L1, L2 respectively, load 4 hydraulic fluid port G of selector valve and electron pressure recuperation valve 6 the Ith control Chamber PFConnection may be selected by the operating position of control load selector valve 4 by actuator pAOr pBOil liquid introduce electron pressure mend Repay the Ith control chamber P of valve 6FIt controls it;

When using electro-hydraulic pressure recuperation valve 7, system also includes guide's oil circuit 21 and guide proportion pressure reducing valve 22, guide The output oil port of proportional pressure-reducing valve 22 and the IIIth control chamber P of electro-hydraulic pressure recuperation valve 7GConnection, guide proportion pressure reducing valve 22 It is connected to respectively with guide's oil circuit 21 and fuel tank into and out of hydraulic fluid port;

As shown in fig. 6, the electro-hydraulic pressure recuperation valve 7 includes displacement sensor 12, compensation valve body 14, compensating spool 15, spring 16, oil inlet A, oil outlet B, the Ith control chamber PF, the IIth control chamber PEWith the IIIth control chamber PG;15 cloth of compensating spool It sets among compensation valve body 14,16 one end of spring acts on 15 left side C of compensating spool, and the other end acts on compensation valve body 14 Above and with compensating spool 15 form the Ith control chamber PF, displacement sensor 12 by compensate valve body 14 be installed in compensating spool 15 On, the position X and speed XV of spool are directly detected, 15 other end of compensating spool forms the IIth control chamber with compensation valve body 14 respectively PEWith the IIIth control chamber PG

The electro-hydraulic pressure recuperation valve 7 is one of open in usual and normally closed type.

The electro-hydraulic pressure recuperation valve 7 can also be arranged in after inlet and outlet independent control valve group.

Further, system can also have multiple hydraulic actuators 5 simultaneously, and multiple oil inlet and outlet independent control valve groups 3 are more A electro-hydraulic pressure recuperation valve 7, and system only one hydraulic power supply 1.

Embodiment 3

As shown in fig. 7, a kind of the third embodiment of the pressure compensated oil inlet and outlet autonomous control system of band of the present invention, The difference from embodiment 1 is that: inlet and outlet independent control valve group 3 is changed by the Ith three position three-way change valve 23 and the IIth 3-position-3-way It is constituted to valve 24;

The oil inlet A of electron pressure recuperation valve 6 is connected to the oil outlet of hydraulic power supply 1, and electron pressure recuperation valve 6 goes out The hydraulic fluid port B oil inlet P with the Ith three position three-way change valve 23 respectivelyWith the oil inlet P of the IIth three position three-way change valve 24Connection, The oil outlet T of Ith three position three-way change valve 23And the IIth three position three-way change valve 24 oil outlet TIt is connected to respectively with fuel tank, The actuator port H of Ith three position three-way change valve 23With the actuator port H of the IIth three position three-way change valve 24Pass through pipeline respectively L1, L2 and 5 liang of chamber p of hydraulic actuatorA、pBConnection, load selector valve 4 hydraulic fluid port E, F are connected to oil circuit L1, L2 respectively, load selection 4 hydraulic fluid port G of valve and the Ith control chamber P of electron pressure recuperation valve 23FConnection.

The above is merely a part but not all of the embodiments of the present application.Based on the reality in the application Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered When the range for belonging to the application protection.

Claims (9)

1. a kind of pressure compensated oil inlet and outlet autonomous control system of band, comprising: hydraulic power supply (1), overflow valve (2), disengaging Mouth independent control valve group (3), hydraulic actuator (5);It is characterized by also including load selector valve (4), electron pressure recuperation valves Which kind of (6) or electro-hydraulic pressure recuperation valve (7), specifically determined using pressure-compensated valve by system load pressure and flow;
The electron pressure recuperation valve is the pressure-compensated valve of proportion electro-magnet control or the pressure compensation of linear motor control Valve or the pressure-compensated valve of rotating electric machine driving ball-screw control, electron pressure recuperation valve is the pressure of proportion electro-magnet control It include displacement sensor (12), proportion electro-magnet (13), compensation valve body (14), compensating spool (15), spring when recuperation valve (16), oil inlet (A), oil outlet (B), the Ith control chamber (PF) and the IIth control chamber (PE);Compensating spool is arranged in compensation valve body Among, spring one end acts on the C of compensating spool left side, and the other end acts on compensation valve body and compensating spool forms the Ith Control chamber PF, proportion electro-magnet connect, acts on the D of compensating spool right side with compensation valve body, and with compensating spool, recuperation valve Body forms the IIth control chamber PE, displacement sensor and proportion electro-magnet integrated installation;
The electron pressure recuperation valve be linear motor control pressure-compensated valve when, including displacement sensor, compensation valve body, Compensating spool, spring, linear motor (17), oil inlet (A), oil outlet (B), the Ith control chamber (PF) and the IIth control chamber (PE); Compensating spool is arranged among compensation valve body, and spring one end acts on the C of compensating spool left side, and the other end acts on recuperation valve The Ith control chamber P is formed on body and with compensating spoolF, displacement sensor by compensate valve body be installed on compensating spool, directly Detect the position X and speed XV of spool, linear motor connect, is installed on the D of compensating spool right side with valve body is compensated, and with benefit Repay valve body, compensating spool forms the IIth control chamber PE
When the electron pressure recuperation valve is the pressure-compensated valve of rotating electric machine driving ball-screw control, including displacement sensing Device, compensation valve body, compensating spool, spring, rotating electric machine (18), ball-screw (19), connecting rod (20), oil inlet (A), oil outlet (B), the Ith control chamber (PF) and the IIth control chamber (PE);Compensating spool is arranged among compensation valve body, and spring one end acts on benefit It repays on the C of spool left side, the other end acts on compensation valve body and forms the Ith control chamber P with compensating spoolF, displacement sensor It is installed on compensating spool by compensating valve body, directly detects the position X and speed XV of spool, rotating electric machine and compensation valve body connect It connects and forms the IIth control chamber P with compensation valve body, compensating spoolE,The connection of the screw rod of rotating electric machine projecting shaft and ball-screw, rolling The nut of ballscrew is connect with connecting rod, and rotating electric machine drives ball-screw rotation, by ball-screw by the rotary motion of motor Linear motion is converted to, so that drive link exports different power and displacement;
The electro-hydraulic pressure recuperation valve includes displacement sensor, compensation valve body, compensating spool, spring, oil inlet (A), fuel-displaced Mouth (B), the Ith control chamber (PF), the IIth control chamber (PE) and the IIIth control chamber (PG);Compensating spool is arranged among compensation valve body, Spring one end acts on the C of compensating spool left side, and the other end acts on compensation valve body and forms the Ith control with compensating spool Chamber P processedF, displacement sensor by compensate valve body be installed on compensating spool, directly detect spool position X and speed XV, benefit It repays the spool other end and forms the IIth control chamber P with recuperation valve body respectivelyEWith the IIIth control chamber PG
When using electro-hydraulic pressure recuperation valve, system also includes guide's oil circuit (21) and guide proportion pressure reducing valve (22), guide The output oil port of proportional pressure-reducing valve and the IIIth control chamber P of electro-hydraulic pressure recuperation valveGConnection, guide proportion pressure reducing valve into and out of Hydraulic fluid port is connected to guide's oil circuit and fuel tank respectively;
Inlet and outlet independent control valve group be by the Ith bi-bit bi-pass proportional reversing valve (8), the IIth bi-bit bi-pass proportional reversing valve (9), IIIth bi-bit bi-pass proportional reversing valve (10) and the IVth bi-bit bi-pass proportional reversing valve (11) are constituted;
The oil inlet A of electron pressure recuperation valve or electro-hydraulic pressure recuperation valve is connected to the oil outlet of hydraulic power supply, electron pressure The IIth control chamber P of the oil outlet B and pressure-compensated valve of recuperation valve or electro-hydraulic pressure recuperation valveE, the IIth bi-bit bi-pass ratio changes To the hydraulic fluid port C of valveWith the hydraulic fluid port C of the IIIth bi-bit bi-pass proportional reversing valveConnection, the hydraulic fluid port of the Ith bi-bit bi-pass proportional reversing valve CWith the hydraulic fluid port C of the IVth bi-bit bi-pass proportional reversing valveIt is connected to respectively with fuel tank, the I, the IIth bi-bit bi-pass proportional reversing valve Hydraulic fluid port DⅠ、DPass through oil circuit L1 and hydraulic actuator control chamber pAConnection, the hydraulic fluid port of the III, the IVth bi-bit bi-pass proportional reversing valve DⅢ、DPass through oil circuit L2 and hydraulic actuator control chamber pAConnection, load selector valve hydraulic fluid port E, F are connected to oil circuit L1, L2 respectively, Load selector valve hydraulic fluid port G and the Ith control chamber P of pressure-compensated valveFConnection may be selected by the operating position of control load selector valve By actuator pAOr pBOil liquid introduce the Ith control chamber P of pressure-compensated valveFIt controls it;
Alternatively, inlet and outlet independent control valve group is by the Ith three position three-way change valve (23) and the IIth three position three-way change valve (24) structure At;The oil inlet A of electron pressure recuperation valve or electro-hydraulic pressure recuperation valve is connected to the oil outlet of hydraulic power supply, and electron pressure is mended Repay the oil outlet B of the valve or electro-hydraulic pressure recuperation valve oil inlet P with the Ith three position three-way change valve respectivelyWith the IIth 3-position-3-way The oil inlet P of reversal valveConnection, the oil outlet T of the Ith three position three-way change valveAnd the IIth three position three-way change valve oil outlet TIt is connected to respectively with fuel tank, the actuator port H of the Ith three position three-way change valveWith the actuator port of the IIth three position three-way change valve HPass through pipeline L1, L2 and two chamber p of hydraulic actuator respectivelyA、pBConnection, load selector valve hydraulic fluid port E, F respectively with oil circuit L1, L2 Connection, load selector valve hydraulic fluid port G and the Ith control chamber P of pressure-compensated valveFConnection.
2. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: described Electron pressure recuperation valve and electro-hydraulic pressure recuperation valve be one of open in usual and normally closed type.
3. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: described Electron pressure recuperation valve and electro-hydraulic pressure recuperation valve can also be arranged in inlet and outlet independent control valve group after.
4. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: described Displacement sensor be integrated on proportion electro-magnet, spool position X and speed are detected by detection detection ratio electromagnet XV, or be installed on compensating spool, directly detect the position X and speed XV of spool.
5. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: described Proportion electro-magnet be one of unidirectional proportion electro-magnet and two-way proportional solenoid.
6. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: described Rotating electric machine be one of direct current generator, synchronous motor and asynchronous machine.
7. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: described The hydraulic pump of hydraulic power supply can be mechanical load sensitive pump, electrical proportional pressure pump and electrical proportional variable-displacement pump One kind drives the power source of hydraulic pump to can be the threephase asynchronous machine of permanent revolving speed, can be AC servo motor, can be out Reluctance motor is closed, internal combustion engine is also possible to.
8. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: described Hydraulic actuator can be one of asymmetric servo cylinder, double outlet-rod hydraulic cylinders and hydraulic motor.
9. the pressure compensated oil inlet and outlet autonomous control system of a kind of band according to claim 1, it is characterised in that: system Can have multiple hydraulic actuators, multiple oil inlet and outlet independent control valve groups, multiple electron pressure recuperation valves or electro-hydraulic simultaneously The combination of pressure-compensated valve or two kinds of pressure-compensated valves, and system only one hydraulic power supply.
CN201811601434.1A 2018-12-26 2018-12-26 A kind of pressure compensated oil inlet and outlet autonomous control system of band CN109630504A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1079277A (en) * 1992-05-23 1993-12-08 重庆建筑工程学院 Electric liquid proportional logic multiway valve
JPH0674054B2 (en) * 1989-07-19 1994-09-21 内田油圧機器工業株式会社 Straight traveling control circuit device for hydraulic traveling vehicle
WO2001055603A1 (en) * 2000-01-25 2001-08-02 Hitachi Construction Machinery Co., Ltd. Hydraulic driving device
CN103267034A (en) * 2013-05-10 2013-08-28 浙江大学 Load sensitive hydraulic system with compensation valve energy recovery function
CN104047931A (en) * 2014-06-23 2014-09-17 柳州柳工液压件有限公司 Three-way pressure compensator assembly
CN106168234A (en) * 2016-07-13 2016-11-30 柳州柳工挖掘机有限公司 A kind of dosing pump variable delivery hydraulic system
CN108291560A (en) * 2015-12-04 2018-07-17 川崎重工业株式会社 Pressure compensation unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0674054B2 (en) * 1989-07-19 1994-09-21 内田油圧機器工業株式会社 Straight traveling control circuit device for hydraulic traveling vehicle
CN1079277A (en) * 1992-05-23 1993-12-08 重庆建筑工程学院 Electric liquid proportional logic multiway valve
WO2001055603A1 (en) * 2000-01-25 2001-08-02 Hitachi Construction Machinery Co., Ltd. Hydraulic driving device
CN103267034A (en) * 2013-05-10 2013-08-28 浙江大学 Load sensitive hydraulic system with compensation valve energy recovery function
CN104047931A (en) * 2014-06-23 2014-09-17 柳州柳工液压件有限公司 Three-way pressure compensator assembly
CN108291560A (en) * 2015-12-04 2018-07-17 川崎重工业株式会社 Pressure compensation unit
CN106168234A (en) * 2016-07-13 2016-11-30 柳州柳工挖掘机有限公司 A kind of dosing pump variable delivery hydraulic system

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