CN106949113A - A kind of double spool digital valve - Google Patents
A kind of double spool digital valve Download PDFInfo
- Publication number
- CN106949113A CN106949113A CN201710317843.8A CN201710317843A CN106949113A CN 106949113 A CN106949113 A CN 106949113A CN 201710317843 A CN201710317843 A CN 201710317843A CN 106949113 A CN106949113 A CN 106949113A
- Authority
- CN
- China
- Prior art keywords
- main valve
- valve
- core bore
- valve core
- endoporus
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
Abstract
The invention discloses a kind of double spool digital valve, the double spool digital valve includes guide valve blocks, left pilot valve, right pilot valve, main valve body, left main valve plug, right main valve plug；The guide valve blocks are arranged on the main valve body upper end；The left pilot valve is arranged in the left pilot valve core bore in the guide valve blocks；The right pilot valve is arranged in the right pilot valve core bore in the guide valve blocks；The left main valve plug is located in the left main valve core bore in the main valve body；The right main valve plug is located in the right main valve core bore in the main valve body, the method have the characteristics that：The left pilot valve, the right pilot valve are by SUPT motor independent controls, and fast response time, control accuracy is high；The left main valve plug, the right main valve plug can be moved independently, be required according to real work, it is determined that optimal double spool control program.
Description
Technical field
The present invention relates to hydraulic buttery valve technical field, particularly a kind of fast response time, control accuracy is high and controls mould
Formula can separate configurations, the double spool digital valve of flexible combination.
Background technology
Electro hydraulic valve is mainly made up of as a kind of important valve class of hydraulic drive and control system pilot valve and main valve,
Pilot valve is generally magnetic valve reversal valve, is mainly changed by commutating and enters main valve oil circuit.In recent years, for the control obtained
Effect, people commutate pilot valve digital valve by common solenoid directional control valve, so as to develop into electrohydraulic digital valve.It can be direct
Enter line interface with computer, it is not necessary to D/A converter, with proportioning valve, servo valve mutually this, such valve arrangement is simple, manufacturability
It is good, reproducible, stable and reliable in work, because it combines closely computer and hydraulic technique, thus there is wide application
Prospect.
Traditional digital valve control mode typically uses Incremental control and pulse width modulation controlled method, and Incremental control is main
Digital type pulse signal Driving Stepping Motor is produced by control system to rotate, then is revolved stepper motor by mechanical switching device
Transhipment is dynamic to be converted to linear motion, so that with movable valve plug movement, so as to control and adjust hydraulic parameter.But due to stepper motor tool
Have compared with large rotating inertia, after being mechanically connected with hydraulic valve, inertia increase, intrinsic frequency is further reduced, therefore frequency response performance
It is very limited, or even high frequency step-out phenomenon occurs.
Pulse-width modulation digital valve is generally high-speed switch type digital valve, mainly adjusts the pulsewidth of input signal to control valve
Push And Release and open and time span, so as to reach the purpose of the control direction of liquid stream, flow and pressure.But it controls essence
Degree is low, and control model is single and structure is complex, is used generally as single digital valve, seldom does pilot valve and uses.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of fast response time, and control accuracy is high and control model can be only
Vertical configuration, the double spool digital valve of flexible combination.
To achieve the above object, the present invention employs following technical schemes：A kind of double spool digital valve, including guide
Valve body, left pilot valve, right pilot valve, main valve body, left main valve plug, right main valve plug；
The guide valve blocks are arranged on the main valve body upper end；
The left pilot valve is arranged in the left pilot valve core bore in the guide valve blocks；
The right pilot valve is arranged in the right pilot valve core bore in the guide valve blocks；
The left main valve plug is located in the left main valve core bore in the main valve body；
The right main valve plug is located in the right main valve core bore in the main valve body；
Wherein, symmetrical structure centered on the guide valve blocks, left pilot valve core bore and right pilot valve hole horizontal are symmetrical, and
Constituted by the hole of different-diameter, endoporus one and endoporus two are symmetrical and shape is identical, and endoporus three is vertical with endoporus four to be communicated,
Endoporus five is vertical with endoporus six to be communicated, the central point of circular hole one and the left pilot valve hole characteristic hole T1 connecting hole, the right side
Pilot valve hole characteristic hole T1' connecting hole is located on same center line, circular hole two and the feature in the left pilot valve core bore
Hole B1 intersects vertically, and circular hole three intersects vertically with the feature holes B1' in the right pilot valve core bore, and endoporus seven passes through asphalt channel
Communicated respectively with the feature holes P1' in the feature holes P1 in left pilot valve core bore, right pilot valve core bore；
The left pilot valve is made up of axle one and axle two, and its axis two is formed with the left pilot valve core bore in the guide valve blocks
Gap coordinates；
The right pilot valve has identical physical dimension with the left pilot valve；
Symmetrical structure centered on the main valve body, wherein, left main core valve opening is made up of the circular hole of different-diameter, right main valve core bore and
Left main core valve opening is symmetrical, and with identical physical dimension, hydraulic fluid port B passes through center-aisle phase vertical with left main valve core bore
Logical, hydraulic fluid port A is communicated by the way that center-aisle is vertical with right main valve core bore, Kong Yiyu oilholes P' vertically communicate and with the pilot valve
Endoporus seven apertures in the human head footpath in body is identical and communicates, and oilhole T is vertically communicated by left main valve core bore described in Kong Eryu, passes through Kong Sanyu institutes
State right main valve core bore to communicate, oilhole P is vertically communicated by the feature holes P2 in left main valve core bore described in Kong Siyu, passes through Kong Wuyu
Feature holes P2' in the right main valve core bore is vertically communicated, and left main valve core bore is vertically communicated described in Kong Liuyu, right described in Kong Qiyu
Main valve core bore is vertically communicated；
The left main valve plug profile is coordinated by not constituted the axle of diameter or not with the left main valve core bore formation gap of the main valve body；
The right main valve plug and the left main valve plug have an identical physical dimension, and with the right main valve core bore shape of the main valve body
Coordinate into gap.
Preferred scheme, also including left SUPT motors, right SUPT motors, wherein, the left SUPT motor shafts and the left elder generation
Guide valve core is connected, and is inserted into the left pilot valve core bore in the guide valve blocks, is fixed the left SUPT motors with screw
On the guide valve blocks, equally the right SUPT motor shafts are connected with the right pilot valve, the elder generation is inserted into
The right SUPT motors, are fixed on the guide valve blocks by the right pilot valve core bore in pilot valve body with screw.
Preferred scheme, also including left main valve plug displacement transducer, right main valve plug displacement transducer, wherein, the left main valve
Core displacement transducer upper end is engaged with the endoporus three in the guide valve blocks, is installed additional after back-moving spring, and its lower end is stretched into described
Endoporus in left main valve plug, its wire is passed by the endoporus four in the guide valve blocks, equally, and the right main valve plug displacement is passed
Sensor upper end is engaged with the endoporus six in the guide valve blocks, is installed additional after back-moving spring, and the right main valve plug is stretched into its lower end
Top endoporus, its wire is passed by the endoporus five in the guide valve blocks.
Preferred scheme, also including it is left block, it is right block, wherein, it is described it is left blocking install additional after sealing device with the main valve
The lower end of left main valve core bore in body is engaged, it is described it is right blocking install additional after sealing device with the right main valve plug in the main valve body
The lower end in hole is engaged.
Preferred scheme, also including central data control unit, in the central data control unit and the guide valve blocks
End is connected.
Beneficial effect relative to prior art is, using such scheme, left pilot valve of the invention, the right pilot valve
Core is by SUPT motor independent controls, and fast response time, control accuracy is high；Left main valve plug, right main valve plug can be moved independently,
Required according to real work, it is determined that optimal double spool control program；With good market application value.
Brief description of the drawings
Fig. 1 is a kind of structural representation of double spool digital valve of the present invention；
Fig. 2 is a kind of guide valve blocks schematic diagram of double spool digital valve of the present invention；
Fig. 3 is a kind of left pilot valve schematic diagram of double spool digital valve of the present invention；
Fig. 4 is a kind of main valve body schematic diagram of double spool digital valve of the present invention；
Fig. 5 is a kind of left main valve plug schematic diagram of double spool digital valve of the present invention.
Embodiment
For the ease of understanding the present invention, below in conjunction with the accompanying drawings and specific embodiment, the present invention will be described in more detail.
The preferred embodiment of the present invention is given in accompanying drawing.But, the present invention can be realized in many different forms, not limited
In the embodiment described by this specification.On the contrary, the purpose for providing these embodiments makes to the disclosure
Understand more thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term used in this specification " vertical ", " level ",
"left", "right" and similar statement are for illustrative purposes only.
Unless otherwise defined, technology all used in this specification and scientific terminology are led with belonging to the technology of the present invention
The implication that the technical staff in domain is generally understood that is identical.Used term is to be in the description of the invention in this specification
The purpose of description specific embodiment, is not intended to the limitation present invention.
As shown in figure 1, the double spool digital valve of the present invention includes guide valve blocks（1）, left pilot valve（3）, right pilot valve
Core（5）, main valve body（8）, left main valve plug（12）, right main valve plug（9）；
The guide valve blocks（1）Installed in the main valve body（8）Upper end；
The left pilot valve（3）Installed in the guide valve blocks（1）In interior left pilot valve core bore；
The right pilot valve（5）Installed in the guide valve blocks（1）In interior right pilot valve core bore；
The left main valve plug（12）Positioned at the main valve body（8）In interior left main valve core bore；
The right main valve plug（9）Positioned at the main valve body（8）Interior right main valve core bore.
As shown in Fig. 2 the guide valve blocks（1）Centered on symmetrical structure, left pilot valve core bore（102）With right pilot valve
Hole（104）Horizontal symmetrical is distributed, and is constituted by the hole of different-diameter, endoporus one（101）With endoporus two（105）It is symmetrical and
Shape is identical, endoporus three（109）With endoporus four（110）Vertically communicate, endoporus five（106）With endoporus six（107）Vertically communicate, circle
Kong Yi（103）Central point and the left pilot valve core bore（102）Feature holes T1 connecting hole, the right pilot valve core bore（104）
Feature holes T1' connecting hole is located on same center line, circular hole two（111）With the left pilot valve core bore（102）In feature
Hole B1 intersects vertically, circular hole three（112）With the right pilot valve core bore（104）In feature holes B1' intersect vertically, endoporus seven
（108）By asphalt channel respectively with left pilot valve core bore（102）In feature holes P1, right pilot valve core bore（104）In spy
Hole P1' is levied to communicate.
As shown in figure 3, the left pilot valve（3）By axle one（301）With axle two（302）Composition, its axis two（302）With
The guide valve blocks（1）In left pilot valve core bore（102）Gap is formed to coordinate.
As shown in figure 1, the right pilot valve（5）With the left pilot valve（3）With identical physical dimension.
As shown in figure 4, the main valve body（8）Centered on symmetrical structure, wherein, left main core valve opening（801）By different-diameter
Circular hole composition, right main valve core bore（804）With left main core valve opening（801）It is symmetrical, and with identical physical dimension, hydraulic fluid port
B passes through center-aisle and left main valve core bore（801）Vertically communicate, hydraulic fluid port A passes through center-aisle and right main valve core bore（804）Vertically
Communicate, Kong Yi（803）It is vertical with oilhole P' communicate and with the guide valve blocks（1）In endoporus seven（108）Aperture it is identical and
Communicate, oilhole T passes through hole two（802）With the left main valve core bore（801）Vertically communicate, pass through hole three（805）With the right master
Spool bore（804）Communicate, oilhole P passes through Kong Si（809）With the left main valve core bore（801）In feature holes P2 vertically communicate,
Pass through hole five（806）With the right main valve core bore（804）In feature holes P2' vertically communicate, hole six（808）With the left main valve
Core bore（801）Vertically communicate, hole seven（807）With the right main valve core bore（804）Vertically communicate.
As shown in figure 5, the left main valve plug（12）Whether profile the axle of diameter by not being made up of or not, with the main valve body（8）A left side
Main valve core bore（801）Gap is formed to coordinate；
As shown in figure 1, the right main valve plug（9）With the left main valve plug（12）With identical physical dimension, and with the master
Valve body（8）Right main valve core bore（804）Gap is formed to coordinate.
As shown in figure 1, also including left SUPT motors（2）, right SUPT motors（6）, wherein, the left SUPT motors（2）Axle
With the left pilot valve（3）It is connected, is inserted into the guide valve blocks（1）In left pilot valve core bore（102）, use screw
By the left SUPT motors（2）It is fixed on the guide valve blocks（1）On, equally by the right SUPT motors（6）Axle and the right side
Pilot valve（5）It is connected, is inserted into the guide valve blocks（1）In right pilot valve core bore（104）, with screw by the right side
SUPT motors（6）It is fixed on the guide valve blocks（1）On；As shown in figure 1, also including left main valve plug displacement transducer（13）, it is right
Main valve plug displacement transducer（7）, wherein, the left main valve plug displacement transducer（13）Upper end and the guide valve blocks（1）In
Endoporus three（109）It is engaged, installs additional after back-moving spring, the left main valve plug is stretched into its lower end（12）In endoporus（1201）, its
Wire passes through the guide valve blocks（1）In endoporus four（110）Pass, equally, the right main valve plug displacement transducer（7）Upper end
With the guide valve blocks（1）In endoporus six（107）It is engaged, installs additional after back-moving spring, the right main valve plug is stretched into its lower end
（9）Top endoporus, its wire passes through the guide valve blocks（1）In endoporus five（106）Pass；As shown in figure 1, also including left stifled
Plug（11）, it is right block（10）, wherein, the left blocking（11）Install additional after sealing device with the main valve body（8）In left main valve
Core bore（801）Lower end be engaged, it is described it is right block（10）Install additional after sealing device with the main valve body（8）In right main valve plug
Hole（804）Lower end be engaged；As shown in figure 1, also including central data control unit（4）, the central data control unit
（4）With the guide valve blocks（1）Upper end is connected.
Furthermore, it is necessary to explanation, done equivalent of all construction, feature and principles according to described in inventional idea of the present invention or
In simple change, the protection domain for being included in patent of the present invention.
Claims (5)
1. a kind of double spool digital valve, it is characterised in that：Including guide valve blocks（1）, left pilot valve（3）, right pilot valve
（5）, main valve body（8）, left main valve plug（12）, right main valve plug（9）；
The guide valve blocks（1）Installed in the main valve body（8）Upper end；
The left pilot valve（3）Installed in the guide valve blocks（1）In interior left pilot valve core bore；
The right pilot valve（5）Installed in the guide valve blocks（1）In interior right pilot valve core bore；
The left main valve plug（12）Positioned at the main valve body（8）In interior left main valve core bore；
The right main valve plug（9）Positioned at the main valve body（8）In interior right main valve core bore；
Wherein, the guide valve blocks（1）Centered on symmetrical structure, left pilot valve core bore（102）With right pilot valve core bore（104）Water
It is flat symmetrical, and constituted by the hole of different-diameter, endoporus one（101）With endoporus two（105）It is symmetrical and shape is identical,
Endoporus three（109）With endoporus four（110）Vertically communicate, endoporus five（106）With endoporus six（107）Vertically communicate, circular hole one（103）
Central point and the left pilot valve core bore（102）Feature holes T1 connecting hole, the right pilot valve core bore（104）Feature holes T1'
Connecting hole be located at same center line on, circular hole two（111）With the left pilot valve core bore（102）In the vertical phases of feature holes B1
Hand over, circular hole three（112）With the right pilot valve core bore（104）In feature holes B1' intersect vertically, endoporus seven（108）Pass through oil
Paths respectively with left pilot valve core bore（102）In feature holes P1, right pilot valve core bore（104）In feature holes P1' communicate；
The left pilot valve（3）By axle one（301）With axle two（302）Composition, its axis two（302）With the guide valve blocks（1）In
Left pilot valve core bore（102）Gap is formed to coordinate；The right pilot valve（5）With the left pilot valve（3）With identical
Physical dimension；The main valve body（8）Centered on symmetrical structure, wherein, left main core valve opening（801）By the circular hole group of different-diameter
Into right main valve core bore（804）With left main core valve opening（801）It is symmetrical, and with identical physical dimension, hydraulic fluid port B is in
Between passage and left main valve core bore（801）Vertically communicate, hydraulic fluid port A passes through center-aisle and right main valve core bore（804）Vertically communicate, hole
One（803）It is vertical with oilhole P' communicate and with the guide valve blocks（1）In endoporus seven（108）Aperture is identical and communicates, oil
Hole T passes through hole two（802）With the left main valve core bore（801）Vertically communicate, pass through hole three（805）With the right main valve core bore
（804）Communicate, oilhole P passes through Kong Si（809）With the left main valve core bore（801）In feature holes P2 vertically communicate, pass through hole
Five（806）With the right main valve core bore（804）In feature holes P2' vertically communicate, hole six（808）With the left main valve core bore
（801）Vertically communicate, hole seven（807）With the right main valve core bore（804）Vertically communicate；The left main valve plug（12）Profile is not by
It is made up of the axle of diameter, with the main valve body（8）Left main valve core bore（801）Gap is formed to coordinate；The right main valve plug（9）With
The left main valve plug（12）With identical physical dimension, and with the main valve body（8）Right main valve core bore（804）Form gap
Coordinate.
2. a kind of double spool digital valve according to claim 1, it is characterised in that also including left SUPT motors（2）, it is right
SUPT motors（6）, wherein, the left SUPT motors（2）Axle and the left pilot valve（3）It is connected, is inserted into the elder generation
Pilot valve body（1）In left pilot valve core bore（102）, with screw by the left SUPT motors（2）It is fixed on the guide valve blocks（1）
On, equally by the right SUPT motors（6）Axle and the right pilot valve（5）It is connected, is inserted into the guide valve blocks（1）
In right pilot valve core bore（104）, with screw by the right SUPT motors（6）It is fixed on the guide valve blocks（1）On.
3. a kind of double spool digital valve according to claim 1, it is characterised in that also including left main valve plug displacement transducer
（13）, right main valve plug displacement transducer（7）, wherein, the left main valve plug displacement transducer（13）Upper end and the guide valve blocks
（1）In endoporus three（109）It is engaged, installs additional after back-moving spring, the left main valve plug is stretched into its lower end（12）In endoporus
（1201）, its wire passes through the guide valve blocks（1）In endoporus four（110）Pass, equally, the right main valve plug displacement sensing
Device（7）Upper end and the guide valve blocks（1）In endoporus six（107）It is engaged, installs additional after back-moving spring, its lower end is stretched into described
Right main valve plug（9）Top endoporus, its wire passes through the guide valve blocks（1）In endoporus five（106）Pass.
4. a kind of double spool digital valve according to claim 1, it is characterised in that also blocked including left（11）, it is right block
（10）, wherein, the left blocking（11）Install additional after sealing device with the main valve body（8）In left main valve core bore（801）Under
End is engaged, the right blocking（10）Install additional after sealing device with the main valve body（8）In right main valve core bore（804）Lower end
It is engaged.
5. a kind of double spool digital valve according to claim 1, it is characterised in that also including central data control unit
（4）, the central data control unit（4）With the guide valve blocks（1）Upper end is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317843.8A CN106949113A (en) | 2017-05-08 | 2017-05-08 | A kind of double spool digital valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317843.8A CN106949113A (en) | 2017-05-08 | 2017-05-08 | A kind of double spool digital valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106949113A true CN106949113A (en) | 2017-07-14 |
Family
ID=59479054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710317843.8A Pending CN106949113A (en) | 2017-05-08 | 2017-05-08 | A kind of double spool digital valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106949113A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0046524A1 (en) * | 1980-08-21 | 1982-03-03 | Sperry Corporation | Hydraulic remote controller |
| CN102177481A (en) * | 2008-06-11 | 2011-09-07 | 伊顿公司 | Auto-tuning electro-hydraulic valve |
| CN106321545A (en) * | 2016-11-10 | 2017-01-11 | 许昌学院 | Electro-hydraulic reversing valve |
| CN106382271A (en) * | 2016-10-18 | 2017-02-08 | 浙江大学 | Dual-valve-element programmable control hydraulic valve piloted by high-speed switching valves and control method of dual-valve-element programmable control hydraulic valve |
| CN106402075A (en) * | 2016-11-10 | 2017-02-15 | 许昌学院 | Electro-hydraulic digital directional valve |
-
2017
- 2017-05-08 CN CN201710317843.8A patent/CN106949113A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0046524A1 (en) * | 1980-08-21 | 1982-03-03 | Sperry Corporation | Hydraulic remote controller |
| CN102177481A (en) * | 2008-06-11 | 2011-09-07 | 伊顿公司 | Auto-tuning electro-hydraulic valve |
| CN106382271A (en) * | 2016-10-18 | 2017-02-08 | 浙江大学 | Dual-valve-element programmable control hydraulic valve piloted by high-speed switching valves and control method of dual-valve-element programmable control hydraulic valve |
| CN106321545A (en) * | 2016-11-10 | 2017-01-11 | 许昌学院 | Electro-hydraulic reversing valve |
| CN106402075A (en) * | 2016-11-10 | 2017-02-15 | 许昌学院 | Electro-hydraulic digital directional valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102954064B (en) | Method for detecting force motor transitional motion type three-way servo valve | |
| CN107595395B (en) | Telesurgical operating system with force feedback | |
| US10724646B2 (en) | Dual motor driven multi function hydraulic regulating valve with dual valve core | |
| CN206682362U (en) | A kind of digital valve | |
| CN105971962B (en) | A kind of motor-driven single spool rotary type hydraulic valve of list | |
| CN101963166A (en) | Dual-mode electric digital valve | |
| CN203906970U (en) | Electromagnetic hydraulic regulating valve | |
| CN208640885U (en) | Remote operation operating system with force feedback | |
| CN106402075A (en) | Electro-hydraulic digital directional valve | |
| CN203906447U (en) | Numerical control machine tool-based PLC (programmable logic controller) control hydraulic experiment table | |
| CN106949113A (en) | A kind of double spool digital valve | |
| WO2002038966A3 (en) | Fluid flow control valves | |
| CN213117673U (en) | Digital reversing throttle valve with displacement feedback | |
| CN206682064U (en) | A kind of advanced digital valve | |
| CN109519433A (en) | A kind of driving device and high velocity liquid pressure valve of high velocity liquid pressure valve | |
| CN201836523U (en) | Valve core positioning structure of numerical-control hydraulic valve | |
| CN211344103U (en) | Reversing throttle valve | |
| CN203560195U (en) | Electro-hydraulic servo valve applicable to high g-value acceleration environment | |
| CN107101021A (en) | A kind of new digital valve | |
| CN108071818A (en) | Four-way valve | |
| CN106321545A (en) | Electro-hydraulic reversing valve | |
| CN103821787B (en) | Pressure is adopted to turn round the hydraulic pilot individual loads multi-way valve of two-dimentional spring | |
| CN206636855U (en) | A kind of mechanical hydraulic servo cylinder | |
| CN116044841A (en) | Pressure flow high-precision control method based on electromagnetic switch valve | |
| CN206723182U (en) | A kind of double spool valve |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170714 |
|
| WD01 | Invention patent application deemed withdrawn after publication |