CN208997060U - A kind of numerical scale hydraulicdirectional control valve - Google Patents
A kind of numerical scale hydraulicdirectional control valve Download PDFInfo
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- CN208997060U CN208997060U CN201821733158.XU CN201821733158U CN208997060U CN 208997060 U CN208997060 U CN 208997060U CN 201821733158 U CN201821733158 U CN 201821733158U CN 208997060 U CN208997060 U CN 208997060U
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- valve
- oil pocket
- pilot valve
- valve core
- port
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Abstract
A kind of numerical scale hydraulicdirectional control valve, main structure are only made of drive motor, pilot valve and main valve；Wherein, pilot valve is 3-position 4-way commutation hydraulic valve, equipped with valve body and columned pilot valve core, the valve chamber both ends of main valve are equipped with left oil pocket and right oil pocket, one end of pilot valve core connects the power output shaft of drive motor by spline pair, the other end connects one end of feedback rod by screw thread pair, and the other end of feedback rod and the left piston of main valve connect；Port A in the port A and port B of pilot valve far from screw thread pair side is connected to left oil pocket, and port B is connected to right oil pocket.The ratio control of the utility model uses a kind of location tracking method, valve core of main valve can be made to automatically track input signal, not need position sensor and controller, features simple structure, accurate positioning, fast response time.
Description
Technical field
The utility model relates to hydraulic-pressure control apparatus, specifically a kind of numerical scale hydraulicdirectional control valve.
Background technique
Electro-hydraulic proportional valve is the very important control element of Hydraulic Field, is mainly used for the speed and position control of hydraulic machinery
System.The general use ratio magnet control pilot valve of electro-hydraulic proportional valve at present, pilot valve control enter the liquid of main valve or so two chambers
Pressure oil to control bound core position, and position sensor as spool feedback and nonshared control unit by complexity control
Algorithm carries out position-force control, and mechanism is complicated, requires height to control, program development and debugging cost are high, and the period is long.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of numerical scale hydraulicdirectional control valves, avoid complicated place
The control of device algorithm and very long debugging development cycle are managed, the ratio to main body valve control equipment is realized with simple and reliable hardware configuration
Position control.
The numerical scale hydraulicdirectional control valve, it is characterised in that: main structure is only by drive motor, pilot valve and main valve
Composition；Wherein,
The pilot valve is 3-position 4-way commutation hydraulic valve, is equipped with valve body and columned pilot valve core, pilot valve valve
Core can be rotated around own axes and be translated along axis；
The valve chamber both ends of the main valve are equipped with left oil pocket and right oil pocket, and valve core of main valve is set to the left oil pocket and right oil pocket of valve chamber
Between, between left oil pocket and valve core of main valve be equipped with can be moved along axis and with the closed left piston being embedded of valve chamber, right oil pocket with
Between valve core of main valve be equipped with can be moved along axis and with the closed right piston being embedded of valve chamber；
One end of the pilot valve core connects the power output shaft of drive motor by spline pair, and the other end passes through spiral shell
Line pair connects one end of feedback rod, and the other end of the feedback rod is connect with left piston；
Port A in the port A and port B of the pilot valve far from screw thread pair side is connected to left oil pocket, close to screw thread
The port B of secondary side is connected to right oil pocket.
Preferably, all axial end faces of feedback rod and screw thread pair are not contacted or are connected to left oil pocket.
The two sides that the spline pair is connected are limited opposite freedom of movement radially and circumferentially, at least in pilot valve valve
There is freedom of axial movement in the axial stroke of core.
The screw thread bar side of the screw thread pair is pilot valve core or is fixedly connected with pilot valve core, the nut side of screw thread pair
It is connect with feedback rod, when left piston axially moves, related feedback rod drives screw thread pair is whole to do axial shifting with pilot valve core
It is dynamic.
The fixed connection opposite with the valve body of the main valve of the valve body of the pilot valve, left piston and right piston respectively with main valve
Spool is connected or is kept in contact.
The drive motor is stepper motor or servo motor or other rotating elements that can be positioned.
The ratio control of the utility model uses a kind of location tracking method, and valve core of main valve can be made to automatically track input letter
Number, do not need position sensor and controller, features simple structure, accurate positioning, fast response time.
Valve core of main valve position is applied directly to pilot valve core by the utility model, when valve port of main valve reaches the aperture of requirement
When, pilot valve valve port is automatically closed, to automatically track the corner of drive motor, completes the accurate control to valve port of main valve aperture
System, does not need valve core displacement sensor and controller, and structure is simple, high reliablity, fast response time, at low cost, saves big
Amount develops debug time and maintenance is simple.
Detailed description of the invention
Fig. 1 is the utility model overall structure schematic diagram,
Fig. 2 is pilot valve schematic enlarged-scale view.
In figure: 1-drive motor, 2-spline pairs, 3-pilot valve cores, 4-pilot valves, 5-screw thread pairs, 6-feedbacks
Bar, 7-left oil pockets, 8-main valves, 9-left pistons, 10-valve core of main valve, 11-right pistons, 12-right oil pockets.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples: numerical scale is hydraulic as shown in fig. 1 changes
To valve, main structure is only made of drive motor 1, pilot valve 4 and main valve 8.
The pilot valve 4 is 3-position 4-way commutation hydraulic valve, is equipped with valve body and columned pilot valve core 3, pilot valve
Spool 3 can be rotated around own axes and be translated along axis.
The ring of valve body inner sidewall is arranged in extraneous oil circuit interface for the pilot valve structural principle amplified as can be seen from Fig. 2
On connected in star, the position that spool corresponds to annular groove is equipped with cricoid convex edge, such as Fig. 1, and spool is equipped with 4 cricoid convex edges, with
Valve body cooperation is isolated into 3 cricoid chambers, and intermediate chamber is connected to fuel feeding end P, and the chamber of two sides is connected to oil revolving end T,
Intermediate twice convex edge has just closed off port A and port B, and such as figure embodiment, left side is port A, and right side is port B.
When spool is when current location moves to left, fuel feeding end P is connected to port A, when spool is when current location moves to right, fuel feeding end P and end
Mouth B connection.
The valve chamber both ends of the main valve 8 be equipped with left oil pocket 7 and right oil pocket 12, valve core of main valve 10 be set to valve chamber left oil pocket and
Between right oil pocket, between left oil pocket 7 and valve core of main valve 10 be equipped with can be moved along axis and with the closed left piston being embedded of valve chamber
9, between right oil pocket 12 and valve core of main valve 10 be equipped with can be moved along axis and with the closed right piston 11 being embedded of valve chamber.When left oil pocket
Pressure be greater than right oil pocket when, valve core of main valve, which is pushed, to move right, when the pressure of left oil pocket be less than right oil pocket when, valve core of main valve
It is moved to the left by promotion.In the moving process of valve core of main valve, the different opening of valve port is generated.
All axial end faces of feedback rod 6 and screw thread pair 5 are not contacted or are connected to left oil pocket 7.Therefore, feedback rod 6
Body is not influenced by left oil pocket oil pressure, and feedback rod is only to drive valve core of main valve under the effect of the pressure difference of left oil pocket and right oil pocket
It is driven and axially moves when mobile.
One end of the pilot valve core 3 connects the power output shaft of drive motor 1, the spline by spline pair 2
2 two sides that are connected of pair are limited opposite freedom of movement radially and circumferentially, at least in the axial stroke of pilot valve core 3
With freedom of axial movement.Common spline pair two sides are key and keyway, and key is embedded at the transmitting that torque is completed in keyway.Key
It, can be with the phase between key and keyway at a distance from the both ends component that key is connected with keyway when having axial freedom between keyway
Variation is subjected to displacement to mobile.
The other end of pilot valve core 3 by screw thread pair 5 connect feedback rod 6 one end, the other end of the feedback rod 6 with
Left piston 9 connects.The screw thread bar side of screw thread pair 5 is pilot valve core 3 or is fixedly connected with pilot valve core 3, the spiral shell of screw thread pair 5
Female side is connect with feedback rod 6.When pilot valve core 3 rotates, under the action of screw thread pair 5, pilot valve core 3 does axial direction simultaneously
Movement, thus generate pilot valve port aperture variation.Meanwhile if when left piston 9 axially moves, related feedback rod 6
Drive screw thread pair 5 is whole to axially move with pilot valve core 3.
The valve body of the pilot valve 4 fixed connection opposite with the valve body of the main valve 8, so that the movement of pilot valve core can
To be fully transmitted to left piston 9, the movement of left piston 9 also can be directly passed to pilot valve core 3.Left piston 9 and right piston
11 connect or are kept in contact with valve core of main valve 10 respectively.So that the movement of valve core of main valve is entirely delivered to left piston 9 and feedback
Bar 6.
The drive motor 1 is stepper motor or servo motor or other rotating elements that can be positioned, and be can act as
Same effect.
Port A and left oil in Fig. 1 embodiment, in the port A and port B of the pilot valve 4 far from screw thread pair side
Chamber 7 is connected to, and the port B close to screw thread pair side is connected to right oil pocket 12.When the drive motor 1 rotates, pass through 2 band of spline pair
Dynamic pilot valve core 3 rotates, and since its other end is a screw thread pair 5, pilot valve 3 just generates axial displacement when rotation, thus
Pilot valve valve port is opened to the left oil pocket 7 of main valve or 12 fuel feeding of right oil pocket, keeps valve core of main valve 10 mobile, due to valve core of main valve 10 and spiral shell
The nut of line pair 5 connects, and drives pilot valve core 3 to move together by screw thread pair 5 when valve core of main valve 10 is mobile, works as valve core of main valve
10 mobile distances and when being equidistant of the movement of pilot valve core 3 under the driving of drive motor 1, pilot valve is closed, hydraulic oil
It is enclosed in the left oil pocket 7 and right oil pocket 10 of main valve, valve core of main valve stops movement.To generate one with drive motor corner at
One valve port opening of ratio.
For example, then pilot valve core 3 rotates with it, in screw thread pair when drive motor 1 rotates an angle according to setting value
Under the action of 5, axial movement is generated, by taking Fig. 1 embodiment as an example, pilot valve core moves right, and feedback rod 6 keeps in situ at this time
Set motionless, pilot valve core is only mobile in screw thread pair inner space, and pilot valve core makes elder generation relative to the movement of pilot valve body
Pilot valve valve port is opened, and the pressure end P of pilot valve is connected to valve port b, and oil revolving end T is connected to valve port a, due to valve port b and main valve
Right oil pocket 12 is connected to, and valve port a is connected to left oil pocket 7, therefore forms a hydraulic circuit, hydraulic drive valve core of main valve 10, the right side
Piston 11 and left piston 9 are moved to the left, therefore also feedback rod 6 are driven to move to left, and feedback rod 6 pushes screw thread pair 5 and pilot valve core 3
Entirety moves to left, and until pilot valve valve port is closed, then valve core of main valve stops movement.At this point, exactly drive motor corner is corresponding
Pitch distance it is equal with the moving distance of valve core of main valve, just make the reset again of pilot valve core and valve core of main valve close.
Claims (6)
1. a kind of numerical scale hydraulicdirectional control valve, it is characterised in that: main structure is only by drive motor (1), pilot valve (4) and master
Valve (8) composition；Wherein,
The pilot valve (4) is 3-position 4-way commutation hydraulic valve, is equipped with valve body and columned pilot valve core (3), pilot valve
Spool (3) can be rotated around own axes and be translated along axis；
The valve chamber both ends of the main valve (8) are equipped with left oil pocket (7) and right oil pocket (12), and valve core of main valve (10) is set to the left oil of valve chamber
Between chamber and right oil pocket, be equipped between left oil pocket (7) and valve core of main valve (10) can be moved along axis and with valve chamber is closed is embedded
Left piston (9), between right oil pocket (12) and valve core of main valve (10) be equipped with can be moved along axis and with the closed right side being embedded of valve chamber
Piston (11)；
Power output shaft of the one end of the pilot valve core (3) by spline pair (2) connection drive motor (1), the other end
By one end of screw thread pair (5) connection feedback rod (6), the other end of the feedback rod (6) is connect with left piston (9)；
Port A in the port A and port B of the pilot valve (4) far from screw thread pair side is connected to left oil pocket (7), close to spiral shell
The port B of line pair side is connected to right oil pocket (12).
2. numerical scale hydraulicdirectional control valve according to claim 1, it is characterised in that: feedback rod (6) and screw thread pair (5)
All axial end faces are not contacted or are connected to left oil pocket (7).
3. numerical scale hydraulicdirectional control valve according to claim 1, it is characterised in that: what the spline pair (2) was connected
Two sides are limited opposite freedom of movement radially and circumferentially, are at least had in the axial stroke of pilot valve core (3) axial
One-movement-freedom-degree.
4. numerical scale hydraulicdirectional control valve according to claim 1, it is characterised in that: the threaded rod of the screw thread pair (5)
Side is pilot valve core (3) or is fixedly connected with pilot valve core (3) that the nut side of screw thread pair (5) is connect with feedback rod (6),
When left piston (9) axially moves, related feedback rod (6) drives screw thread pair (5) whole and pilot valve core (3) do axial shifting
It is dynamic.
5. numerical scale hydraulicdirectional control valve according to claim 1, it is characterised in that: the valve body of the pilot valve (4) with
The relatively fixed connection of the valve body of the main valve (8), left piston (9) and right piston (11) connect or protect with valve core of main valve (10) respectively
Hold contact.
6. numerical scale hydraulicdirectional control valve described in one of -5 according to claim 1, it is characterised in that: the drive motor (1)
For stepper motor or servo motor or other rotating elements that can be positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821733158.XU CN208997060U (en) | 2018-10-24 | 2018-10-24 | A kind of numerical scale hydraulicdirectional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821733158.XU CN208997060U (en) | 2018-10-24 | 2018-10-24 | A kind of numerical scale hydraulicdirectional control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208997060U true CN208997060U (en) | 2019-06-18 |
Family
ID=66805560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821733158.XU Expired - Fee Related CN208997060U (en) | 2018-10-24 | 2018-10-24 | A kind of numerical scale hydraulicdirectional control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208997060U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111730316A (en) * | 2020-08-17 | 2020-10-02 | 山东天瑞重工有限公司 | Hydraulic rock drill's dismouting axle sleeve frock |
-
2018
- 2018-10-24 CN CN201821733158.XU patent/CN208997060U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111730316A (en) * | 2020-08-17 | 2020-10-02 | 山东天瑞重工有限公司 | Hydraulic rock drill's dismouting axle sleeve frock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190618 Termination date: 20211024 |