CN106555785B - Type pilot proportion directional flow rate continuous control valve - Google Patents
Type pilot proportion directional flow rate continuous control valve Download PDFInfo
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- CN106555785B CN106555785B CN201610884765.5A CN201610884765A CN106555785B CN 106555785 B CN106555785 B CN 106555785B CN 201610884765 A CN201610884765 A CN 201610884765A CN 106555785 B CN106555785 B CN 106555785B
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Classifications
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- 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
-
- 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
- F15B13/16—Special measures for feedback, e.g. by a follow-up device
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6656—Closed loop control, i.e. control using feedback
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
Abstract
A kind of type pilot proportion directional flow rate continuous control valve, it is characterized in that drive mechanism is arranged in the side of main valve, area regulation ring is provided with cover plate, driving valve element is disposed coaxially in cover plate with area regulation ring, control port Pc is provided between driving valve element and cover plate, the outside control oil of connection, main valve plug and driving valve element are coaxially arranged, and main valve plug is arranged in main valve body；The oil-out of guide proportional valve, area regulation ring connect with the cavity volume h that cover plate is formed with fuel tank.Driver element and the independent fuel feeding of main valve, driver element use constant pressure source fuel feeding, and valve can both realize low voltage control high pressure, can also improve dynamic response and controllability of the main valve in low pressure, and dynamic response can not be influenceed by main valve inlet outlet pressure differential.Drive mechanism is arranged in the side of main valve body by the present invention, convenient to install hand gear；Control port uses constant pressure source fuel feeding, can improve the stability, control accuracy and dynamic characteristic of valve, and simple in construction, and cost is low, application easy to spread.
Description
Technical field
The invention belongs to electric hydraulic control valve technical field, especially fluid flow direction and flow to carry out continuous ratio control
The guide proportion directional flow rate continuous control valve of system.
Background technology
Proportional direction valve and proportional multi-way valve, it is one of critical elements in electrohydraulic control system, its effect is continuous
Control movement velocity, position and the power output of hydraulic actuator.In the prior art, proportional direction valve and proportional multi-way valve are usual
For internal control type, controllability when pressure is low is poor, and dynamic response is slack-off；, need to be in main when valve is operated in extra high pressure
Set pressure-reducing valve to reduce the charge oil pressure of pilot stage between pilot stage, improve the stability of valve；Most proportional multi-way valve
And fraction direction valve uses pressure balanced open loop control mode, influenceed by load change, control accuracy is low；To improve valve
Stability and dynamic responding speed, the double-closed-loop control principle of pilot valve displacement and main valve plug displacement can be used, it brings
The problem of be that the Static and dynamic performance of valve is completely dependent on closed loop controller, any detection and controlling unit occur in pilot valve and main valve
Failure, valve just cisco unity malfunction.
An authorized patent of invention, China Patent No. 200610102032.7, disclose a kind of " guide proportion side
To choke valve ", it is by together with internal feedback valve and electric closed loop valve arrangement, when main valve plug displacement transducer and the feedback signal of response
When adjuster breaks down, internal feedback state of a control is automatically converted to, it is ensured that the security reliability of system, but its control chamber
Pilot valve outlet is connected with the A hydraulic fluid ports and B hydraulic fluid ports of main valve respectively, causes runner complicated；Using bilateral control mode, be not suitable for
Main valve sets hand gear；Control pressure uses same oil sources with charge oil pressure, and when pressure is low, the controllability of valve is poor, pressure
Gao Shi, pilot valve stability reduce, and influence control accuracy.
The content of the invention
It is low etc. above-mentioned in order to solve existing guide proportion directional flow rate continuous control valve low pressure poor controllability, high-voltage stability
Problem, the stability contorting of valve is realized, the present invention provides a kind of drive device and separated with main valve, simple in construction, easily fabricated elder generation
Lead proportion directional flow rate continuous control valve.
Technical scheme：A kind of type pilot proportion directional flow rate continuous control valve, includes the first guide proportion
Valve, the second guide proportional valve, proportional amplifier, end cap, main valve body, main valve plug, driving valve element, retaining spring, the first area are adjusted
Ring, second area regulation ring are saved, the output end of proportional amplifier is connected with the first guide proportional valve and the second guide proportional valve；Its
It is characterized in：Driving valve element forms 1 control port Pc being connected with the external world, the first area regulation ring, second area with end cap
Regulation ring is connected with the cavity volume h that end cap is formed with fuel tank T；Main valve plug forms 5 hydraulic fluid ports being connected with the external world with main valve body, i.e.,
2 oil return openings, two actuator ports, an oil inlet, oil inlet introduce pressure oil, two actuator ports respectively with actuator
Two chambers connect, and oil return opening connects with fuel tank, two actuator ports and the size of oil return opening open amount and the displacement of main valve plug into
Direct ratio, driving valve element are equal with the displacement of main valve plug；First area regulation ring, second area regulation ring, driving valve element, first are determined
Position spring and the second retaining spring are disposed coaxially in end cap, and end cap is connected with main valve body, drive valve element and the coaxial cloth of main valve plug
Put, main valve plug is disposed axially in main valve body；The driving valve element is provided with three interconnected oilholes and two logical oil
Hole, outside control oil enter the first oilhole P1 by the control port Pc on end cap, enter driving valve element by the first oilhole P1
The second interior oilhole P2, the first area regulation ring is respectively enterd with driving the cavity volume j1 and that valve element is formed by the 3rd oilhole P3
In the cavity volume j2 that two area regulation rings are formed with driving valve element, the first area regulation ring and second area regulation ring are machined with the 6th
Oilhole P6, oil groove P7, drive the oil-through-hole K1 of valve element that the fluid in cavity volume j1 is incorporated into the first area regulation ring and driving valve
In the cavity volume j3 that core is formed, drive the oil-through-hole K2 of valve element that the fluid in cavity volume j2 is incorporated into second area regulation ring and driving
In the cavity volume j4 that valve element is formed, cavity volume j1 and second area that the 6th oilhole P6 forms the first area regulation ring with driving valve element
Outside control oil in the cavity volume j2 that regulation ring is formed with driving valve element is incorporated into oil groove P7, and oil groove P7 is other by outside control oil
It is incorporated into the first cavity volume e and the second cavity volume f；Main valve plug is provided with the 4th oilhole P4 and the 5th oilhole P5, in the second cavity volume f
Pressure oil is entered in the 5th oilhole P5 by the 4th oilhole P4, then is entered by the 5th oilhole P5 in the 3rd cavity volume g；In end cap
First cavity volume e connects through first flow L1 with the first guide proportional valve oil inlet, and the oil-out of the first guide proportional valve is through the 3rd
Runner L3 connects with fuel tank T, and the 3rd cavity volume g in the second cavity volume f and main valve body in end cap is first through second flow channel L2 and second
The connection of proportioning valve oil inlet is led, the oil-out of the second guide proportional valve connects through third flow channel with fuel tank T.
Guide proportion directional flow rate continuous control valve in above-mentioned technical proposal, driving the connection of valve element and main valve plug includes
Following one kind：
（1）It is integrative-structure to drive valve element and main valve plug；
（2）It is Split type structure to drive valve element and main valve plug.
Guide proportion directional flow rate continuous control valve in above-mentioned technical proposal, main valve body one end can connect control dress manually
Put;First guide proportional valve and the second guide proportional valve can carry displacement transducer and form closed-loop control or without displacement sensing
Device；First guide proportional valve and the second guide proportional valve are the proportioning valve or high-speed switch valve of continuous control；Medium in end cap
It is one kind in oil, water and air.
Type pilot proportion directional flow rate continuous control valve of the present invention, major advantage are embodied in：Driver element is independent with main valve
Fuel feeding, driver element use constant pressure source fuel feeding, can both realize low voltage control high pressure, and the dynamic that can also improve main valve in low pressure is rung
Should be with controllability, and dynamic response can not be influenceed by main valve inlet outlet pressure differential；The fluid oil return of guide proportional valve and cavity volume h
Case, pilot stage power is reduced, simplify valve inner runner；Driver element and main valve body use isolating construction, unilateral control,
Convenient increase hand gear, is realized integrated with ratio control manually.The particularly convenient realization for realizing proportional multi-way valve, it is and existing
Pressure balance banked direction control valves is compared, and inner stream flow feedback control precision is high, and pilot valve is controlled using throttling, whole valve stability
It is good.Same valve can increase displacement transducer, form closed-loop control, improve the control accuracy of valve.
Fig. 1 is the principle schematic diagram of embodiment of the present invention 1；
Fig. 2 is the principle schematic diagram of embodiment of the present invention 2；
Fig. 3 is the valve core structure schematic diagram of the present invention；
Fig. 4 is the main valve core area regulation ring structural representation of the present invention.
In figure, 1a：First guide proportional valve, 1b：Second guide proportional valve, 2：Proportional amplifier, 3：End cap, 4：Main valve
Body, 5：Driving valve element, 6：Main valve plug, 7a：First retaining spring, 7b：Second retaining spring, 8a：First area regulation ring, 8b：
Second area regulation ring, 9：Manual overvide, 10a：First guide's displacement transducer, 10b：Second guide's displacement transducer,
11：Guide's feedback signal amplifier, 12：First adder, 13：Closed loop controller, 14：Electronic switch, 15：Second adder,
16：Feedforward controller, 17：Main valve displacement transducer, e：First cavity volume, f：Second cavity volume, g：3rd cavity volume, j1, j2, j3, j4,
h：Cavity volume, A, B：Actuator port, Pc：Control port, Ps：Oil-feed port, T：Fuel tank, P1：First oilhole, P2：Second oilhole, P3：
3rd oilhole, P4：4th oilhole, P5：5th oilhole, P6：6th oilhole, P7：Oil groove, K1, K2：Oil-through-hole, L1：It is first-class
Road, L2：Second flow channel, L3：Third flow channel.
Embodiment
With reference to drawings and embodiments further description, this embodiment party can be made to the principle and structure of the present invention
Formula is that the present invention is explained in detail, and does not make any restrictions to the present invention.
Embodiment 1：Type pilot proportion directional flow rate continuous control valve includes the first guide proportional valve 1a, the second guide
Proportioning valve 1b, proportional amplifier 2, end cap 3, main valve body 4, driving valve element 5, main valve plug 6, the first area regulation ring 8a, the second face
Product regulation ring 8b, the first retaining spring 7a, the second retaining spring 7b, the output end of proportional amplifier 2 and the first guide proportional valve
1a and the second guide proportional valve 1b connections；It is characterized in that：Driving valve element 5 forms 1 control being connected with external world oil with end cap 3
Mouthful Pc, the cavity volume h that the first area regulation ring 8a, second area regulation ring 8b are formed with end cap 3 are connected with fuel tank T；Main valve plug 6 with
Main valve body 4 forms 5 hydraulic fluid ports being connected with the external world, i.e. the first oil-out A, the second oil-out B, oil inlet P s, two oil returns
Mouth T, wherein, oil inlet introduces pressure oil, and the first oil-out A, the second oil-out B connect with two chambers of actuator respectively, oil return
Mouthful connected with fuel tank, the first oil-out A, the second oil-out B and oil return inlet T open amount size and the displacement of main valve plug 5 into
Direct ratio, driving valve element 6 are equal with the displacement of main valve plug 5；First area regulation ring 8a, second area regulation ring 8b, driving valve element
5th, the first retaining spring 7a and the second retaining spring 7b are disposed coaxially in end cap 3, and end cap 3 is connected with main valve body 4, drive valve element
5 is coaxially arranged with main valve plug 6, and main valve plug 6 is disposed axially in main valve body 4；
As shown in Figure 3 and Figure 4, valve element includes driving valve element 5 and main valve plug 6 for valve core structure and area regulation ring structure difference
Two parts, drive valve element 5 and main valve plug 6 can be separation can also be it is integral, main valve plug 6 has three steps；The drive
Movable valve plug 5 is provided with interconnected three oilholes P1, P2, P3 and oil-through-hole K1 and K2, and outside control oil is by end cap 3
Control port Pc enter the first oilhole P1, by the first oilhole P1 enter driving valve element 5 in the second oilhole P2, pass through the 3rd
Oilhole P3 respectively enters the first area regulation ring 8a with driving the cavity volume j1 and second area regulation ring 8b and driving that valve element 5 is formed
In the cavity volume j2 that valve element 5 is formed, the first area regulation ring 8a and second area regulation ring 8b are machined with the 6th oilhole P6, oil groove
P7, drive the oil-through-hole K1 of valve element 5 that the fluid in cavity volume j1 is incorporated into what the first area regulation ring 8a was formed with driving valve element 5
In cavity volume j3, drive the oil-through-hole K2 of valve element 5 that the fluid in cavity volume j2 is incorporated into second area regulation ring 8b and driving valve element 5
In the cavity volume j4 of formation, cavity volume j1 and second area that the 6th oilhole P6 forms the first area regulation ring 8a with driving valve element 5
Regulation ring 8b is incorporated into oil groove P7 with the outside control oil in the cavity volume j2 of the driving formation of valve element 5, and oil groove P7 is oily by outside control
It is introduced between in the first cavity volume e and the second cavity volume f；Main valve plug is provided with the 4th oilhole P4 and the 5th oilhole P5, the second cavity volume f
In pressure oil by the 4th oilhole P4 enter the 5th oilhole P5 in, then by the 5th oilhole P5 enter the 3rd cavity volume g in；End cap
The first cavity volume e in 3 connects through first flow L1 with the first guide proportional valve 1a oil inlets, and the first guide proportional valve 1a's is fuel-displaced
Mouth connects through third flow channel L3 with fuel tank T, and the 3rd cavity volume g in the second cavity volume f and main valve body 4 in end cap 3 is through second flow channel
L2 connects with the second guide proportional valve 1b oil inlets, and the second guide proportional valve 1b oil-out connects through third flow channel L3 and fuel tank T
It is logical.
Said structure feature forms the type pilot proportion directional flow rate continuous control valve of the first technical scheme.
Embodiment 2
In Fig. 2, the structure of the type pilot proportion directional flow rate continuous control valve as described in embodiment 1 and work are former
Reason, embodiment 2 is that first guide's displacement transducer 10a, second guide's displacement sensing are had additional on the basis of embodiment 1
Device 10b, guide's feedback signal amplifier 11, first adder 12, closed loop controller 13, electronic switch 14, second adder 15,
Feedforward controller 16；It is anti-that first guide's displacement transducer 10a and second guide's displacement transducer 10b output end are connected to guide
The input of feedback signal amplifier 11, the output end of guide's feedback signal amplifier 11 and the control terminal and first of electronic switch 14
The input connection of adder I 12, setting signaluXs is connected to the input of first adder 12 and feedforward controller 16 simultaneously
End, the output end of first adder 12 are connected to the input of closed loop controller 13；The input of electronic switch 14 and closed loop control
The output end connection of device 13 processed, the output end of electronic switch 14 and the output end of feedforward controller 16 are connected to second adder 15
Input, the output end of second adder 15 is connected to the input of proportional amplifier 2.
Said structure feature forms the type pilot proportion directional flow rate continuous control valve of second of technical scheme.
Claims (7)
1. type pilot proportion directional flow rate continuous control valve, includes the first guide proportional valve（1a）, the second guide proportional valve
（1b）, proportional amplifier（2）, end cap（3）, main valve body（4）, driving valve element（5）, main valve plug（6）, the first retaining spring（7a）、
Second retaining spring（7b）, the first area regulation ring（8a）, second area regulation ring（8b）, proportional amplifier（2）Output end
With the first guide proportional valve（1a）With the second guide proportional valve（1b）Connection；It is characterized in that：Drive valve element（5）With end cap（3）Shape
The control port Pc being connected into 1 with the external world, the first area regulation ring（8a）, second area regulation ring（8b）With end cap（3）
The cavity volume h of formation is connected with fuel tank T；Main valve plug（6）With main valve body（4）5 hydraulic fluid ports being connected with the external world are formed, i.e., first goes out
Hydraulic fluid port A, oil inlet P s, the second oil-out B, two oil return inlet Ts, wherein, oil inlet P s introduces pressure oil, the first oil-out A, the
Two oil-out B connect with two chambers of actuator respectively, and oil return inlet T connects with fuel tank, the first oil-out A, the second oil-out B and return
The size and main valve plug of hydraulic fluid port T open amounts（6）Displacement it is directly proportional, drive valve element（5）With main valve plug（6）Displacement it is equal；
First area regulation ring（8a）, second area regulation ring（8b）, driving valve element（5）, the first retaining spring（7a）With the second positioning
Spring（7b）It is disposed coaxially on end cap（3）In, end cap（3）With main valve body（4）Connection, drive valve element（5）With main valve plug（6）Coaxially
Arrangement, main valve plug（6）It is disposed axially in main valve body（4）In；The driving valve element（5）Be provided with three interconnected oilholes with
And two oil-through-holes, outside control oil pass through end cap（3）On control port Pc enter the first oilhole P1, pass through the first oilhole P1
Into driving valve element（5）The second interior oilhole P2, the first area regulation ring is respectively enterd by the 3rd oilhole P3（8a）With driving
Valve element（5）The cavity volume j1 and second area regulation ring of formation（8b）With driving valve element（5）In the cavity volume j2 of formation, the first area is adjusted
Save ring（8a）With second area regulation ring（8b）The 6th oilhole P6, oil groove P7 are machined with, drives valve element（5）Oil-through-hole K1 will hold
Fluid in chamber j1 is incorporated into the first area regulation ring（8a）With driving valve element（5）In the cavity volume j3 of formation, valve element is driven（5）'s
Fluid in cavity volume j2 is incorporated into second area regulation ring by oil-through-hole K2（8b）With driving valve element（5）In the cavity volume j4 of formation,
6th oilhole P6 is by the first area regulation ring（8a）With driving valve element（5）The cavity volume j1 and second area regulation ring of formation（8b）With
Drive valve element（5）Outside control oil in the cavity volume j2 of formation is incorporated into oil groove P7, and oil groove P7 does not introduce outside control oil
Into the first cavity volume e and the second cavity volume f；Main valve plug（6）The 4th oilhole P4 and the 5th oilhole P5 is provided with, in the second cavity volume f
Pressure oil is entered in the 5th oilhole P5 by the 4th oilhole P4, then enters main valve plug by the 5th oilhole P5（6）With main valve body（4）
In the 3rd cavity volume g formed；End cap（3）In the first cavity volume e through first flow L1 and the first guide proportional valve（1a）Oil inlet
Connection, the first guide proportional valve（1a）Oil-out connected through third flow channel L3 with fuel tank T, end cap（3）In the second cavity volume f and
Main valve body（4）In the 3rd cavity volume g through second flow channel L2 and the second guide proportional valve（1b）Oil inlet connects, the second guide proportion
Valve（1b）Oil-out connected through third flow channel L3 with fuel tank T.
2. type pilot proportion directional flow rate continuous control valve as claimed in claim 1, it is characterized in that the main valve body（4）One end connects
Connect manual overvide（9）.
3. type pilot proportion directional flow rate continuous control valve as claimed in claim 1, it is characterized in that driving valve element（5）With main valve
Core（6）Connection include following one kind：
（1）Drive valve element（5）With main valve plug（6）It is integrative-structure；
（2）Drive valve element（5）With main valve plug（6）It is Split type structure.
4. type pilot proportion directional flow rate continuous control valve as claimed in claim 1, it is characterized in that the first guide proportional valve
（1a）With the second guide proportional valve（1b）It is the proportioning valve of continuous control.
5. type pilot proportion directional flow rate continuous control valve as claimed in claim 1, it is characterized in that the first guide proportional valve
（1a）With the second guide proportional valve（1b）It is high-speed switch valve.
6. type pilot proportion directional flow rate continuous control valve as claimed in claim 1, it is characterized in that the medium in end cap be oil,
One kind of water and air.
7. type pilot proportion directional flow rate continuous control valve, it is characterized in that in the type pilot proportion directional stream described in claim 1
First guide's displacement transducer is had additional in amount continuous control valve（10a）, second guide's displacement transducer（10b）, guide feedback
Signal amplifier（11）, first adder（12）, closed loop controller（13）, electronic switch（14）, second adder（15）, feedforward
Controller（16）；First guide's displacement transducer（10a）With second guide's displacement transducer（10b）Output end be connected to guide
Feedback signal amplifier（11）Input, guide's feedback signal amplifier（11）Output end and electronic switch（14）Control
End and first adder（12）Input connection, setting signaluXs is connected to first adder simultaneously（12）And feedforward control
Device（16）Input, first adder（12）Output end be connected to closed loop controller（13）Input；Electronic switch
（14）Input and closed loop controller（13）Output end connection, electronic switch（14）Output end and feedforward controller（16）
Output end be connected to second adder（15）Input, second adder（15）Output end be connected to proportional amplifier
（2）Input.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610884765.5A CN106555785B (en) | 2016-10-11 | 2016-10-11 | Type pilot proportion directional flow rate continuous control valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610884765.5A CN106555785B (en) | 2016-10-11 | 2016-10-11 | Type pilot proportion directional flow rate continuous control valve |
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| CN106555785A CN106555785A (en) | 2017-04-05 |
| CN106555785B true CN106555785B (en) | 2018-01-05 |
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| CN114738343A (en) * | 2022-03-08 | 2022-07-12 | 江苏菲尔特液压机械有限公司 | Proportional direction valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3878765A (en) * | 1971-01-05 | 1975-04-22 | Sperry Rand Ltd | Hydraulic actuator controls |
| CN100590324C (en) * | 2006-10-16 | 2010-02-17 | 太原理工大学 | Guide proportion directional throttle valve |
| CN100575716C (en) * | 2008-03-21 | 2009-12-30 | 太原理工大学 | A kind of redundant electrohydraulic servo-controlling system |
| CN101846109B (en) * | 2010-04-30 | 2012-08-29 | 太原理工大学 | Two-way flow rate continuous control valve |
| CN102425581B (en) * | 2011-12-12 | 2015-03-25 | 太原理工大学 | Pilot flow closed-loop controlled flow valve and control method |
| KR101596379B1 (en) * | 2014-02-05 | 2016-02-23 | 군산대학교산학협력단 | Auto-reciprocating flow regulating control device for flow amplifier |
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