CN208106859U - A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve - Google Patents
A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve Download PDFInfo
- Publication number
- CN208106859U CN208106859U CN201820570704.6U CN201820570704U CN208106859U CN 208106859 U CN208106859 U CN 208106859U CN 201820570704 U CN201820570704 U CN 201820570704U CN 208106859 U CN208106859 U CN 208106859U
- Authority
- CN
- China
- Prior art keywords
- speed switch
- valve
- hydraulic cylinder
- hydraulic
- switch valve
- 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.)
- Expired - Fee Related
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a kind of pump control asymmetrical cylinder electrohydraulic control systems of high-speed switch Flat valve, belong to electrohydraulic control technology field.The piston of hydraulic cylinder is directly driven when utility model works by servo motor drive two-way quantitative pump, high-speed switch valve is for inhibiting flow unbalance response in hydraulic cylinder especially asymmetrical cylinder motion process, assisting two-way quantitative hydraulic pump simultaneously is system flow, the influence in flow dead zone when two-way quantitative hydraulic pump being avoided to slowly run, the flow control accuracy of raising system, pressure protection valve guarantees system safety for limiting system pressure, accumulator is for storing and discharging oil liquid, sensor is used for monitoring state, real-time feedback system parameter is to signal acquisition and controlling unit, the movement of servo motor and high-speed switch valve is controlled after being acquired and handled by signal acquisition and controlling unit, realize the high-precision control of hydraulic cylinder piston rod displacement.The utility model has the characteristics that energy-efficient, contamination resistance is strong and reliable in action.
Description
Technical field
The utility model belongs to electrohydraulic control technology field more particularly to a kind of pump control of high-speed switch Flat valve is asymmetric
Cylinder electrohydraulic control system.
Background technique
High-speed switch valve is a kind of novel digital electric-hydraulic switching control element, can be directly by ON/OFF digital signal
It is converted into fluid pulse signal, the pressure or flow to hydraulic system carry out PWM control, make computer control system without D/A
Translation interface can be realized to be organically combined with hydraulic system, and valve port can be realized in the duty ratio by adjusting the pwm signal of input
The adjusting of uninterrupted.Its structure is simple, cheap, and the pressure loss is small, low energy consumption, to the insensitive, reliable operation of pollution, and
Response speed with higher, repetitive error is small, operating accuracy is high.At present have been widely used for robot, automotive transmission,
The fields such as fuel oil injection and aerospace control system.
As the requirement small to driving mechanism using flexible, energy consumption of aerospace and traditional industry field increasingly increases, pump
Asymmetrical cylinder electrohydraulic control system is controlled as a kind of is by what the element heights such as motor, hydraulic pump, hydraulic valve and hydraulic cylinder integrated
System, because its power to weight ratio and the higher advantage of transmission efficiency start gradually to be applied.But the especially tooth of the dynamical element in system
There are minimum speed limitations for wheel pump, this causes flow system flow controlling dead error；When executive component is asymmetrical cylinder, hydraulic system is deposited
The raising of HYDRAULIC CONTROL SYSTEM precision is influenced in flow unbalance response；When control element is hydraulic control one-way valve, valve port is opened
The time longer requirement without adapting to hydraulic system to high frequency sound is closed, although the electrohydraulic servo valve response time is shorter and can be with
Higher control precision is obtained, but its contamination resistance is poor, fever is larger.It is asymmetric to limit pump control for the presence of the above problem
Cylinder electrohydraulic control system develops to the direction of energy-efficient, high frequency sound, high control precision and high reliability, is the technology of this field
Personnel's urgent problem.
Utility model content
The utility model aim be overcome system energy consumption existing for conventional electro-hydraulic executing agency hydraulic system is big, frequency response is low,
The low problem low with reliability of precision is controlled, a kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve is provided.
In order to achieve the above objectives, the utility model provides following technical scheme：The utility model mainly include servo motor,
Two-way quantitative hydraulic pump, high-speed switch valve, accumulator, pressure protection valve, hydraulic cylinder, pressure sensor, displacement sensor and letter
Number acquisition and control unit.The power output shaft of the servo motor is connected with the power input shaft of two-way quantitative hydraulic pump；Institute
It states the first hydraulic fluid port of two-way quantitative hydraulic pump to communicate with hydraulic cylinder rodless cavity, the second hydraulic fluid port of two-way quantitative hydraulic pump and hydraulic cylinder have bar
Chamber communicates；The high-speed switch valve is at least one, for controlling oil circuit between accumulator and hydraulic cylinder rod chamber and rodless cavity
On-off, valve port closes in the power-off state；The pressure protection valve is divided into first pressure protection valve and second pressure protection
Valve, wherein the oil inlet of first pressure protection valve is communicated with hydraulic cylinder rodless cavity, oil outlet is communicated with hydraulic cylinder rod chamber, and second
Pressure protection valve oil inlet is communicated with hydraulic cylinder rod chamber, oil outlet is communicated with hydraulic cylinder rodless cavity；Signal acquisition and controlling list
Member is for receiving the signal of pressure sensor and displacement sensor, and output signal control servo motor, high-speed switch valve is dynamic
Make.
Further, the high-speed switch valve is divided into the first high-speed switch valve and the second high-speed switch valve, and two high speeds are opened
The valve port for closing valve is turned off in the power-off state, wherein in the first high-speed switch valve a hydraulic fluid port and hydraulic cylinder rodless cavity phase
Logical, a hydraulic fluid port in the second high-speed switch valve is communicated with hydraulic cylinder rod chamber, another hydraulic fluid port of the first high-speed switch valve and second
Another hydraulic fluid port of high-speed switch valve communicates after communicating with accumulator.
Further, the high-speed switch valve is by forming high-speed switch valve group after multiple high-speed switch valves parallel connections.It is applied to
It can also be by forming multiple groups valve after multiple high-speed switch valves parallel connections when big flow occasion, but the function of every group of valve is identical as single valve.
Further, first pressure sensor is connected on the hydraulic cylinder rodless cavity inlet and outlet of fuel channel；The hydraulic cylinder has bar
Second pressure sensor is connected on chamber inlet and outlet of fuel channel；Third pressure sensor is connected on the inlet and outlet of fuel channel of the accumulator；It is described
The hydraulic cylinder piston rod of hydraulic cylinder is connected to displacement sensor.
Further, the Signal acquiring and processing module of the signal acquisition and controlling unit receives first pressure sensing
The output signal of device, second pressure sensor, third pressure sensor, displacement sensor and speed encoder, by system mode
Monitoring module and deviation judgement, operating mode switching module are handled, finally by control signal output module output signal control
The movement of servo motor, the first high-speed switch valve and the second high-speed switch valve processed.
Compared with prior art, the utility model has the following advantages that：It is pumped by introducing high-speed switch Flat valve technology
It controls in asymmetrical cylinder electrohydraulic control system, replaces the hydraulic control one-way valve in legacy system using high-speed switch valve, play high speed and open
The advantages such as the valve pressure loss is small, fast response time, repetitive error are small are closed, both can cooperate realization system stream with two-way quantitative hydraulic pump
The accurate control of amount, and can inhibit brought flow system flow unbalance response when executive component is asymmetrical cylinder；Pass through signal
Acquisition coordinates each section element manipulation with control unit, and so that the utility model is had control, precision is high, energy-efficient, antipollution
The characteristics of power is strong and reliable in action.
Detailed description of the invention
Fig. 1 is the Hydraulic System Principle schematic diagram of the utility model.
Fig. 2 is the control system schematic illustration of the utility model.
Drawing reference numeral：1- servo motor, 2- two-way quantitative hydraulic pump, 201- two-way quantitative the first hydraulic fluid port of hydraulic pump, 202-
The second hydraulic fluid port of two-way quantitative hydraulic pump, 3- high-speed switch valve, the first high-speed switch valve of 301-, the second high-speed switch valve of 302-, 4-
Accumulator, 501- first pressure control valve, 502- second pressure control valve, 6- hydraulic cylinder, 601- hydraulic cylinder rodless cavity, 602- liquid
Pressure cylinder piston, 603- hydraulic cylinder piston rod, 604- hydraulic cylinder rod chamber, 701- first pressure sensor, 702- second pressure pass
Sensor, 703- third pressure sensor, 8- displacement sensor, 9- signal acquisition and controlling unit, 901- comparator, 902- deviation
Judgement, operating mode switching module, 903- control signal output module, 904- servo-driver, 905- speed encoder, 906-
Signal acquiring and processing module, 907- system state monitoring module.
Specific embodiment
In conjunction with attached drawing 1, the pump control asymmetrical cylinder hydraulic control system of high-speed switch Flat valve provided by the utility model, packet
Include servo motor 1, two-way quantitative hydraulic pump 2, high-speed switch valve 3, accumulator 4, pressure protection valve, hydraulic cylinder 6, pressure sensing
Device, displacement sensor 8 and signal acquisition and controlling unit 9.The power output shaft and two-way quantitative hydraulic pump of the servo motor
Power input shaft be connected, servo motor drives hydraulic pump to complete oil suction and oil extraction process；The two-way quantitative hydraulic pump first
Hydraulic fluid port 201 is communicated with hydraulic cylinder rodless cavity 601, and the second hydraulic fluid port of two-way quantitative hydraulic pump 202 is communicated with hydraulic cylinder rod chamber 604,
According to hydraulic cylinder direction difference, two-way quantitative hydraulic pump is that hydraulic cylinder rodless cavity and hydraulic cylinder rod chamber replace fuel feeding；Institute
The high-speed switch valve stated shares 2, respectively the first high-speed switch 301 and the second high-speed switch valve 302, both for two-way
Valve, and valve port is turned off in the power-off state, wherein a hydraulic fluid port is communicated with hydraulic cylinder rodless cavity in the first high-speed switch valve,
A hydraulic fluid port is communicated with hydraulic cylinder rod chamber in second high-speed switch valve, and another hydraulic fluid port of the two communicates after communicating with accumulator, is used
The on-off of oil circuit between control accumulator and system, in the specific implementation process of the utility model, according to not homologous ray
The function of flow, the first high-speed switch valve and the second high-speed switch valve can be by 1 high-speed switch valve realization, can also be by multiple high speeds
Two groups of valves are formed after switch valve is in parallel, but the function of every group of valve is identical as single valve, is used as two-way ratio switch valve, signal is adopted
Collection issues the valve port on-off action that signal controls each high-speed switch valve with control unit as needed, realize the on-off of flow with
Big minor adjustment；The pressure protection valve shares 2, and for limiting the maximum pressure of system, wherein first pressure protects valve 501
Oil inlet communicated with hydraulic cylinder rodless cavity, oil outlet is communicated with hydraulic cylinder rod chamber, second pressure protect 502 oil inlet of valve with
Hydraulic cylinder rod chamber communicates, and oil outlet is communicated with hydraulic cylinder rodless cavity, and the pressore setting of the two allows with the highest of system
Pressure is identical, and the valve port both when system worked well is normally closed, when the pressure of hydraulic cylinder rodless cavity is equal to or over pressure tune
When definite value, first pressure protects the valve port of valve to open overflow, and the highest for making the pressure of hydraulic cylinder rodless cavity be maintained at system allows
Pressure, when the pressure of hydraulic cylinder rod chamber is equal to or over pressore setting, it is excessive that second pressure protects the valve port of valve to open
Stream, makes the pressure of hydraulic cylinder rod chamber be maintained at the maximum working pressure of system；On the hydraulic cylinder rodless cavity inlet and outlet of fuel channel, connect
There is a first pressure sensor 701, on the hydraulic cylinder rod chamber inlet and outlet of fuel channel, is connected to second pressure sensor 702, the accumulation of energy
On the inlet and outlet of fuel channel of device, it is connected to third pressure sensor 703, the output signal of pressure sensor is by Signal acquiring and processing module
906 receive, and realize the real time monitoring to system pressure state；The hydraulic cylinder piston rod 603 of the hydraulic cylinder is connected to displacement sensing
Device, output signal are received and processed by Signal acquiring and processing module.
For the course of work that the utility model is described in detail, now select attached Hydraulic System Principle shown in FIG. 1 as preferred
Embodiment is illustrated, it is notable that in fig. 1, the function of the first high-speed switch valve and the second high-speed switch valve is equal
It is realized by 1 high-speed switch valve, the structure type of hydraulic cylinder is single rod asymmetrical cylinder, i.e., hydraulic cylinder piston rod is only one
End is stretched out, and the oil liquid pressure active area at 602 both ends of hydraulic cylinder piston is unequal.
In attached the utility model control system principle shown in Fig. 2, signal acquisition and controlling unit includes comparator altogether
901, deviation judgement, operating mode switching module 902, control signal output module 903, servo-driver 904, speed encoder
905,907 7 parts of Signal acquiring and processing module and system state monitoring module.Wherein Signal acquiring and processing module is used
In acquisition speed encoder, first pressure sensor, second pressure sensor, third pressure sensor and displacement sensor output
Servo motor tach signal, first pressure signal, second pressure signal, third pressure signal and hydraulic cylinder piston rod displacement letter
Number, received after treatment by system state monitoring module, after judging system mode by system operate normally or
Fault-signal is transported to deviation and judges, in operating mode switching module.Meanwhile the hydraulic cylinder piston rod position of displacement sensor output
Shifting signal is also received by comparator, the displacement commands signal and hydraulic cylinder piston rod displacement signal inputted user by comparator into
Row makes the difference, and the offset deviation of generation is transported to deviation and is judged, in operating mode switching module, embedding in advance in the module
Enter control algolithm, current deviation is carried out by it to judge and specify next step system operating mode, result is then transported to control
Signal output module processed exports servo motor command signal by control signal output module and pulse command signal control servo is driven
The movement of dynamic device, the first high-speed switch valve and the second high-speed switch valve.Servo-driver output drive signal controls servo motor
Rotation, at the same the revolving speed of servo motor received by speed encoder after feed back to servo-driver, by servo-driver complete pair
The accurate closed-loop control of the revolution of servo motor, and drive the hydraulic pump output pressure of two-way quantitative and flow.First high-speed switch
Valve and the second high-speed switch valve control valve port opening/closing time according to pulse command signal, realize to the pressure of valve port output oil liquid and
Flow control.Two-way quantitative hydraulic pump and high-speed switch valve output oil liquid pressure and flow joint effect hydraulic cylinder rodless cavity and
The pressure and flow of hydraulic cylinder rod chamber, the final control for realizing the displacement to hydraulic cylinder piston rod.The above process is that this is practical
The course of work in a novel duty cycle, the above process successively carries out in each duty cycle, and constantly recycles, until
The output signal of displacement sensor is identical as displacement commands signal and is no longer changed.
Realize the process of hydraulic cylinder piston rod Bit andits control with regard to the embodiments of the present invention now in conjunction with the utility model
It illustrates.The displacement commands signal of the utility model inputs to signal acquisition and controlling list by the user of the utility model
Member, the size of displacement commands signal determine the hydraulic cylinder piston rod direction of motion and target position.For displacement commands signal with
Hydraulic cylinder piston rod actual displacement, i.e. change of the deviation of the output signal of displacement sensor during utility model works
Change, the course of work of the utility model is now divided into big displacement deviation pattern and thin tail sheep deviation pattern, the switching of both of which
Condition is the relationship between the deviation and specific shift value of the output signal for instructing displacement signal and displacement sensor, it is proposed that is used
The specific shift value is less than or equal to 0.5mm in the process.For example, taking the specific shift value is 0.2mm, then have：Instruct displacement signal
And the deviation of the output signal of displacement sensor is big displacement deviation pattern when being more than or equal to 0.2mm, instructs displacement signal and position
The deviation of the output signal of displacement sensor is thin tail sheep deviation pattern when being less than 0.2mm.The judgement of both of which and switch in partially
It is completed in difference judgement, operating mode switching module.
The big displacement deviation pattern course of work：Hydraulic cylinder piston rod is persistently stretched out or is retracted in this mode.When hydraulic
When cylinder piston rod persistently stretches out, signal acquisition and controlling element output signal rotates forward servo motor driving hydraulic pump, oil
Liquid enters hydraulic cylinder rodless cavity after pumping the discharge of the first hydraulic fluid port from two-way quantitative, pushes hydraulic cylinder piston rod to stretch out, hydraulic cylinder has bar
Enter the second hydraulic fluid port of two-way quantitative hydraulic pump after oil liquid discharge in chamber.Since hydraulic cylinder is single rod asymmetrical cylinder, above-mentioned
In the process hydraulic cylinder rodless cavity enter oil liquid it is bigger than the oil liquid flow that hydraulic cylinder rod chamber be discharged, need at this time signal acquisition and
Control unit gives the second Speed On-off Valve signal, fully opens the valve port of the second high-speed switch valve, makes oily in accumulator
Liquid enters the second hydraulic fluid port of two-way quantitative hydraulic pump together with the oil liquid that hydraulic cylinder rod chamber is discharged, to guarantee two-way quantitative hydraulic pump
Oil suction it is equal with oil extraction flow.When hydraulic cylinder piston rod persistently retracts, signal acquisition and controlling element output signal makes to watch
It takes motor-driven hydraulic pumps to rotate backward, oil liquid enters hydraulic cylinder rod chamber after pumping the discharge of the second hydraulic fluid port from two-way quantitative, pushes
Hydraulic cylinder piston rod retracts, and enters the first hydraulic fluid port of two-way quantitative hydraulic pump after the oil liquid discharge in hydraulic cylinder rodless cavity.Due to liquid
Cylinder pressure is single rod asymmetrical cylinder, and the oil liquid that hydraulic cylinder rodless cavity is discharged in above process is than the oil that hydraulic cylinder rod chamber enters
Flow quantity is big, needs signal acquisition and controlling unit to the first Speed On-off Valve signal at this time, makes the first high-speed switch valve
Valve port fully open, make hydraulic cylinder rodless cavity be discharged oil liquid both enter accumulator, also enter two-way quantitative hydraulic pump first
Hydraulic fluid port, the oil suction to guarantee two-way quantitative hydraulic pump are equal with oil extraction flow.
The thin tail sheep deviation pattern course of work：The mode appears under big displacement deviation pattern hydraulic cylinder piston rod close to mesh
When cursor position, when instructing the deviation size of output signal of displacement signal and displacement sensor to meet switching condition, this is practical
Novel be switched under thin tail sheep deviation pattern works.Under this mode, the of short duration stretching of hydraulic cylinder piston rod or retraction.With big position
It is similar under shifting deviation pattern, since hydraulic cylinder is that single rod is asymmetric during the of short duration stretching of hydraulic cylinder piston rod or retraction
Cylinder causes the oil liquid flow that hydraulic cylinder rodless cavity enters or the oil liquid of discharge is discharged or enters from hydraulic cylinder rod chamber different,
The flow as needed for system is smaller, so signal acquisition and controlling element output signal keeps servo motor driving two-way quantitative hydraulic
Pump works under the minimum speed of permission.During hydraulic cylinder piston rod of short duration stretching, the output of signal acquisition and controlling unit
Signal rotates forward servo motor driving hydraulic pump, and the first high-speed switch valve valve port is made continuously to be opened and closed completion to hydraulic cylinder without bar
The adjusting of chamber oil inlet flow, the second high-speed switch valve valve port are continuously opened and closed completion to two-way quantitative hydraulic pump the second hydraulic fluid port oil inlet stream
The adjusting of amount；During hydraulic cylinder piston rod of short duration retraction, signal acquisition and controlling element output signal drives servo motor
Hydrodynamic press pump rotates backward, and the first high-speed switch valve valve port is made continuously to be opened and closed completion to the first hydraulic fluid port oil inlet of two-way quantitative hydraulic pump
The adjusting of flow, the second high-speed switch valve valve port are continuously opened and closed the adjusting completed to hydraulic cylinder rod chamber oil inlet flow.This process
In, the of short duration stretching of hydraulic cylinder piston rod or retraction process constantly can continuously occur, and instruct displacement signal and displacement sensing
The deviation of the output signal of device is gradually reduced, and finally levels off to 0.
In summary both of which, above two mode is alternately present the utility model during the work time, and big displacement is inclined
Differential mode formula is used for the process that hydraulic cylinder piston rod is persistently stretched out or retracted, and thin tail sheep deviation pattern is for realizing hydraulic cylinder piston
Bar displacement accurate control, in both modes, high-speed switch valve quickly, action message, with servo motor cooperate, realize system
The accurate control of flow.
Pressure-control valve is for guaranteeing that system pressure is no more than maximum allowable working pressure, when system pressure is permitted more than highest
When operating pressure perhaps, i.e. set pressure, the valve port of pressure-control valve is opened.Pressure sensor is used for detection system pressure, works as pressure
When force control valve breaks down, system pressure is abnormal, and the fault-signal is after pressure sensor by signal acquisition and controlling list
Member acquisition, then issuing control signal opens the first high-speed switch valve and the second high-speed switch valve valve port, and system pressure unloads
Lotus.Accumulator completes the recycling and release process to system capacity, reaches energy-efficient effect while absorbing and oil liquid is discharged
Fruit.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (5)
1. a kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve mainly includes servo motor, two-way quantitative
Hydraulic pump, high-speed switch valve, accumulator, pressure protection valve, hydraulic cylinder, pressure sensor, displacement sensor and signal acquisition with
Control unit, it is characterised in that：The power output shaft of the servo motor is connected with the power input shaft of two-way quantitative hydraulic pump；
First hydraulic fluid port of two-way quantitative hydraulic pump is communicated with hydraulic cylinder rodless cavity, and the second hydraulic fluid port of two-way quantitative hydraulic pump has with hydraulic cylinder
Rod cavity communicates；The high-speed switch valve is at least one, oily between accumulator and hydraulic cylinder rod chamber and rodless cavity for controlling
The on-off on road, valve port are closed in the power-off state；The pressure protection valve is divided into first pressure protection valve and second pressure is protected
Valve is protected, wherein the oil inlet of first pressure protection valve is communicated with hydraulic cylinder rodless cavity, oil outlet is communicated with hydraulic cylinder rod chamber；The
Two pressure protection valve oil inlets are communicated with hydraulic cylinder rod chamber, oil outlet is communicated with hydraulic cylinder rodless cavity；Signal acquisition and controlling
Unit is used to receive the signal of pressure sensor and displacement sensor, and output signal control servo motor, high-speed switch valve
Movement.
2. a kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve according to claim 1, feature
It is：The high-speed switch valve is divided into the first high-speed switch valve and the second high-speed switch valve, and the valve port of two high-speed switch valves exists
It is turned off under off-position, wherein in the first high-speed switch valve a hydraulic fluid port is communicated with hydraulic cylinder rodless cavity, the second high speed is opened
The hydraulic fluid port closed in valve is communicated with hydraulic cylinder rod chamber, and another hydraulic fluid port of the first high-speed switch valve and the second high-speed switch valve are another
Hydraulic fluid port communicates after communicating with accumulator.
3. a kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve according to claim 1, feature
It is：The high-speed switch valve is by forming high-speed switch valve group after multiple high-speed switch valves parallel connections.
4. a kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve according to claim 1, feature
It is：First pressure sensor is connected on the hydraulic cylinder rodless cavity inlet and outlet of fuel channel；On the hydraulic cylinder rod chamber inlet and outlet of fuel channel
It is connected to second pressure sensor；Third pressure sensor is connected on the inlet and outlet of fuel channel of the accumulator；The hydraulic cylinder it is hydraulic
Cylinder piston rod is connected to displacement sensor.
5. a kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve according to claim 1, feature
It is：The Signal acquiring and processing module of the signal acquisition and controlling unit receives first pressure sensor, second pressure passes
The output signal of sensor, third pressure sensor, displacement sensor and speed encoder, by system status monitoring module and deviation
Judgement, operating mode switching module are handled, and finally control servo motor, first by control signal output module output signal
The movement of high-speed switch valve and the second high-speed switch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820570704.6U CN208106859U (en) | 2018-04-20 | 2018-04-20 | A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820570704.6U CN208106859U (en) | 2018-04-20 | 2018-04-20 | A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208106859U true CN208106859U (en) | 2018-11-16 |
Family
ID=64119372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820570704.6U Expired - Fee Related CN208106859U (en) | 2018-04-20 | 2018-04-20 | A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208106859U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468662A (en) * | 2018-04-20 | 2018-08-31 | 燕山大学 | A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve |
| CN110147039A (en) * | 2019-05-17 | 2019-08-20 | 固高科技(深圳)有限公司 | Hydrauservo System and its control device |
| CN111237292A (en) * | 2020-01-12 | 2020-06-05 | 福建工程学院 | Speed closed-loop control method of variable-rotation-speed single-pump cylinder control closed system under four-quadrant working condition |
| CN116989037A (en) * | 2023-08-07 | 2023-11-03 | 重庆大学 | Pump control system and control method for energy recovery |
-
2018
- 2018-04-20 CN CN201820570704.6U patent/CN208106859U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468662A (en) * | 2018-04-20 | 2018-08-31 | 燕山大学 | A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve |
| CN110147039A (en) * | 2019-05-17 | 2019-08-20 | 固高科技(深圳)有限公司 | Hydrauservo System and its control device |
| CN111237292A (en) * | 2020-01-12 | 2020-06-05 | 福建工程学院 | Speed closed-loop control method of variable-rotation-speed single-pump cylinder control closed system under four-quadrant working condition |
| CN116989037A (en) * | 2023-08-07 | 2023-11-03 | 重庆大学 | Pump control system and control method for energy recovery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108468662A (en) | A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve | |
| CN208106859U (en) | A kind of pump control asymmetrical cylinder electrohydraulic control system of high-speed switch Flat valve | |
| CN110966270B (en) | Digital electro-hydrostatic actuator system | |
| CN100491748C (en) | Independent control electrohydraulic system of oil inlet and outlet matching with pump valve composite flux | |
| US5568766A (en) | Method for controlling the drive for a hydraulic press having a plurality of operating phases | |
| 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) | |
| CN105715597B (en) | Constant backpressure Direct Drive Electro-hydraulic Servo System and its control method | |
| CN110762065A (en) | Digital hydraulic actuator system for closed pump valve composite speed regulation and control method thereof | |
| CN108412826B (en) | Double-pump parallel driving electro-hydrostatic actuator and control method thereof | |
| CN204914641U (en) | Two -way pump control hydraulic system of electromechanical servo quick jar of liquid of oil pressure | |
| CN105952946B (en) | Double dynamical gear pump control type electrohydraulic linkage executive control system | |
| CN105443477A (en) | Hydraulic drive with rapid stroke and load stroke | |
| CN108278233B (en) | A kind of hydraulic system of Spool rotating formula liquid controlled reversing vibration excitor | |
| CN104632794A (en) | Electro-hydraulic servo system of direct drive type hydraulic hoist | |
| CN205446224U (en) | Formula electricity liquid servo is directly driven to invariable backpressure | |
| CN103470578B (en) | Directly driving type differential volume control electro-hydraulic servo control system | |
| CN115324954A (en) | Electric load sensitivity-electro-hydrostatic composite driving control method for engineering machinery operation system | |
| CN105570238A (en) | Valveless hydraulic servo synchronous system | |
| CN2925841Y (en) | Oil-pressure servo controller of injection molding machine | |
| CN203548436U (en) | Directly-driven type differential-volume-controlled electro-hydraulic servo control system | |
| CN104564862A (en) | Combined pump-controlled cylinder electric hydraulic control system | |
| CN107091253A (en) | A kind of hydraulic pressure performs equipment | |
| CN207093478U (en) | A kind of hydraulic pressure performs equipment | |
| CN110285098A (en) | Energy-saving electric machine drive hydraulic system principle and its control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |