CN106194879A - Direct Action Type 2D Electric hydraulic pressure servo valve - Google Patents

Direct Action Type 2D Electric hydraulic pressure servo valve Download PDF

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Publication number
CN106194879A
CN106194879A CN201610721751.1A CN201610721751A CN106194879A CN 106194879 A CN106194879 A CN 106194879A CN 201610721751 A CN201610721751 A CN 201610721751A CN 106194879 A CN106194879 A CN 106194879A
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China
Prior art keywords
valve body
piston
spring
module
spool
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Granted
Application number
CN201610721751.1A
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Chinese (zh)
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CN106194879B (en
Inventor
阮健
孙坚
左希庆
刘国文
贾文昂
孟彬
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Zhejiang University of Technology ZJUT
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Zhejiang University of Technology ZJUT
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Priority to CN201610721751.1A priority Critical patent/CN106194879B/en
Publication of CN106194879A publication Critical patent/CN106194879A/en
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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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F15B2013/0448—Actuation by solenoid and permanent magnet

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Servomotors (AREA)

Abstract

The present invention relates to a kind of Direct Action Type 2D Electric hydraulic pressure servo valve.It is characterized in that being made up of valve body module, electromechanical transducer module, drive mechanism module and displacement sensor module, displacement sensor module matches with valve body module, and electromechanical transducer module is matched with valve body module by drive mechanism module；Institute's displacement sensor modules is monitored the rotary magnet signal of telecommunication of the displacement of 2D piston and electromechanical transducer module in valve body module in real time and is constituted closed loop feedback.The present invention moves axially distance by control that the deflection angle of rotary magnet changes spool, and then the size changing spring force adjusts the pressure of system, structurally enormously simplify original two-stage or multistage version, meet the requirement that industry is the compactest.

Description

Direct Action Type 2D Electric hydraulic pressure servo valve
Technical field
The invention belongs to the electrohydraulic servo valve in Fluid-transmission and control field, particularly relate to a kind of electro-hydraulic pressure of Direct Action Type 2D Force servo valve.
Background technology
Electro-hydraulic servo control technology has organically combined the advantage of Fluid-transmission control technology and information electronic technology, has merit Rate amplify high, response is fast, dead band is little, can realize the advantage such as continuous double-direction control of output flow and pressure, at Aero-Space, point The important national strategy army industrial circles such as end weapon, iron and steel, power generation are used widely.Electric hydraulic pressure servo valve is An important and preferable servoelement in Force control system, it is to accept analog quantity electric control signal, and output pressure is with automatically controlled Signal magnitude processed and change in polarity and the hydraulic control valve of quickly response, have that volume is little, inertia is little, it is fast, highly sensitive to respond Etc. advantage, should in Material Testing Machine, fatigue test of structure machine, aircraft hydraulic control system of vehicle and ship steering engine control system With extensively.
Electric hydraulic pressure servo valve is mainly based on nozzle baffle type and jet pipe type pressure servo valve two types at present, but Technology mostly is external monopolization；The widest pressure servo valve of domestic application is mainly two-stage or three grades of Electric hydraulic pressure servo valve, this The function admirable of a little servo valves, but the most extremely complex, manufacture difficulty, and the condition of use is the harshest, to fluid Cleannes require higher, and fault rate is higher.
Due to the various deficiencies of pressure servo valve, the occasion that required precision is the highest in actual production, usually electricity consumption liquor ratio Example pressure control valve, such as electro-hydraulic proportional reducing valve, overflow valve etc., uses Linear displacement transducer (LVDT) to enter spool position Row is measured and closed loop control, constitutes electricity feedback-type direct acting proportional pressure control valve, can improve determining of spool to a great extent Position rigidity and the control accuracy of power output, for replacing the Electric hydraulic pressure servo valve realization control to system force, but control accuracy Slightly show inferior.
Summary of the invention
For problems of the prior art, it is an object of the invention to provide a kind of Direct Action Type 2D electro-hydraulic pressure servo The technical scheme of valve, changes the distance that moves axially of 2D piston, and then changes by controlling the deflection angle of rotary magnet The size of spring force adjusts the pressure of system, structurally enormously simplify original two-stage or multistage version, Meet the requirement that industry is the compactest.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that by valve body module, electromechanical transducer module, biography Dynamic mechanism module and displacement sensor module composition, displacement sensor module matches with valve body module, electromechanical transducer Module is matched with valve body module by drive mechanism module；Institute's displacement sensor modules is monitored 2D in valve body module in real time and is lived The displacement of plug constitutes closed loop feedback with the rotary magnet signal of telecommunication of electromechanical transducer module.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that described valve body module includes spool, 2D piston, bullet Spring and valve body, 2D piston is arranged on the right side of valve body, and spool is arranged on the left side of valve body, 2D piston have in valve body rotation and Slide axially two directions of motion；2D piston one end is provided with shoulder, shoulder coordinates and is provided with a pair pressure hole and a pair low pressure Hole, a pair pressure hole communicates with oil-feed P mouth, and a pair low pressure hole communicates with fuel-displaced T mouth；Inner hole of cylinder wall symmetry in valve body is offered Have a pair damping skewed slot that the shoulder with 2D piston matches, the shoulder of 2D piston and cylinder barrel and be arranged on the right side of 2D piston same Forming left sensitive cavity and right sensitive cavity between thimble, 2D piston is installed in cylinder barrel, a pair pressure hole on the shoulder of 2D piston It is crossed to form four small aperture area flowed friction in series half-bridges with a pair low pressure hole with a pair damping skewed slot, controls Left sensitive cavity pressure changes, and right sensitive cavity connection oil-feed P mouth is high pressure, left sensitive cavity and right sensitive cavity pressure controlled in hydraulic pressure Resistance half-bridge, produced pressure differential drives 2D piston axially-movable；Spool be provided with left part shoulder, right part shoulder and in Portion's shoulder, the left part shoulder correspondence oil-feed P mouth of spool, middle part shoulder correspondence controls A mouth, the corresponding fuel-displaced T mouth of right part shoulder, Left part shoulder, right part shoulder and middle part shoulder seal slidingly against with valve body inner bore and coordinate；Set between spool and 2D piston Being equipped with left pad and right pad, spring is arranged between left pad and right pad, and spool right-hand member is contacted with right pad by steel ball Coordinating, 2D piston left end contacts cooperation by steel ball with left pad, and the axially-movable of 2D piston can be converted to valve by spring The axially-movable of core.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that described electromechanical transducer module includes phase interworking Rotary magnet, connecting plate and the electric magnet protective cover closed；Described drive mechanism module includes that spring keeps bar, electric magnet zero-bit Keeping spring, spring shim, spring retainer, upper driving lever and lower shift fork, spring retainer is arranged on connecting plate, and spring keeps Arranging described spring on frame and keep bar, spring keeps socket on bar to arrange electric magnet zero-bit and keeps spring and spring shim, above dials Bar one end connects the rotary shaft of rotary magnet, and upper driving lever other end clamping is arranged on spring and keeps on bar and be positioned at spring shim And between spring retainer, upper driving lever can keep sliding on bar at spring；Upper driving lever connects the one of rotary magnet rotary shaft End is set to oval outline, and the upper end of lower shift fork connects valve body with oval outline snap-fit engagement, the lower end of lower shift fork The 2D piston of module.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that institute's displacement sensor modules includes LVDT displacement Sensor, the sensor mandrel of LVDT displacement transducer is threaded connection bar and is connected with the 2D piston of valve body module.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that described valve body left end arranges a valve pocket, spool is pacified Being loaded in valve pocket, use interference fit to install a spacer pin limiting spool radial rotating at spool right-hand member, spacer pin is at valve Slide in the U-type groove of set.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that described valve body side arranges end cap, valve body another Side arranges lid.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that described spool left side is set to collar plate shape structure, Spool left and right mobile time spool collar plate shape structure and valve body and valve pocket between formed squeeze film.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that the upper end of described lower shift fork is the U of opening upwards Shape is pitched, U-shaped fork and oval outline snap-fit engagement.
Described Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that described LVDT displacement transducer is arranged on sensor On support.
Beneficial effects of the present invention is mainly manifested in:
1, for the deficiency of existing Electric hydraulic pressure servo valve contamination resistance difference, 2D spiral servo is controlled technology with pressure servo Combine, constitute compact conformation, the Direct Action Type 2D Electric hydraulic pressure servo valve of principle advanced person, simplify the structure of pressure servo valve, Improve its contamination resistance；
2, (spool left end sets up collar plate shape structure as damping mould to design its valve core structure to utilize squeeze film buffering theory Block), during spool moves left and right, it is possible to increase system viscous damping, by improving system damping than the stability ensureing valve Energy；
3, use LVDT displacement transducer to monitor the axial displacement of 2D piston in real time, formed with the single direction rotation electric magnet signal of telecommunication and close Ring feeds back, and improves overall control precision and the dynamic response capability of valve；
4, by spring contact between 2D piston and spool, both can realize the transmission of power, be possible to prevent again pressure excessive, make power Control system will not " locking ".
Accompanying drawing explanation
Fig. 1 is the structural representation of Direct Action Type 2D Electric hydraulic pressure servo valve；
Fig. 2 is the sectional view of valve body；
Fig. 3 is the structural representation of 2D piston；
Fig. 4 is the valve core structure schematic diagram of band damping disc buffer；
Fig. 5 is the side schematic view of connecting plate；
Fig. 6 is Direct Action Type 2D Electric hydraulic pressure servo valve operation principle schematic diagram.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention will be further described:
With reference to Fig. 1-Fig. 6, a kind of Direct Action Type 2D Electric hydraulic pressure servo valve include first screw the 1, second screw the 4, the 3rd screw 6, 4th screw the 12, the 5th screw the 13, the 6th screw the 14, the 7th screw the 18, the 8th screw 21 and the 9th screw the 25, the oneth O type are close Seal the 2, the 2nd O RunddichtringO the 27, the 3rd O RunddichtringO 29, valve body 3, rotary magnet 5, connecting plate 7, spring holding bar 8, Electric magnet zero-bit keep spring 9, spring shim 10, spring retainer 11, upper driving lever 15, fastening steel ball 16, aviation socket 17, under Shift fork 19, whorl brace rod 20, sensor mandrel 22, LVDT displacement transducer 23, sensor stand 24, lid 26, concentric ring 28, cylinder barrel 30,2D piston 31, right pad the 32, first steel ball the 33, second steel ball 36, spring 34, left pad 35, spacer pin 37, valve Set 38, spool 39, end cap 40.
Wherein, the first screw 1 connects end cap and valve body, and the second screw 4 connects electric magnet protective cover and connecting plate 7, and the 3rd Screw 6 connects rotary magnet and connecting plate 7, and the 4th screw 12 connects spring retainer 11 and connecting plate, and the 5th screw 13 is even Connecing lid 26 and electric magnet protective cover, the 6th upper driving lever 15 of screw 14 locking, the 7th screw 18 is for being connected to aviation socket 7 On lid 26, the 8th screw 21 is used for locking lower shift fork 19, and the 9th screw 25 connects lid and connecting plate；Oneth O RunddichtringO 2 For end cover and valve body, the 2nd O RunddichtringO 27 is used for sealing 2D piston 31 and connecting plate 7, the 3rd O RunddichtringO 29, For sealed valve body 3 and connecting plate 7.These arrange and are conventional setting, do not repeat at this.
The Direct Action Type 2D Electric hydraulic pressure servo valve of the present invention, by valve body module, electromechanical transducer module, drive mechanism mould Block and displacement sensor module composition, displacement sensor module matches with valve body module and monitors the displacement of 2D piston, motor Tool conversion module is matched with valve body module by drive mechanism module, and 2D piston is carried out rotation process；Displacement transducer Module monitors the displacement of 2D piston and the single direction rotation electric magnet signal of telecommunication structure of electromechanical transducer module in valve body module in real time Become closed loop feedback.
Valve body module includes spool, 2D piston, spring and valve body, and 2D piston is arranged on the right side of valve body, and spool is arranged on The left side of valve body, 2D piston has rotation and two directions of motion that slide axially in valve body；2D piston one end is provided with shoulder, Coordinating on shoulder and be provided with a pair pressure hole b and a pair low pressure hole c, a pair pressure hole communicates with oil-feed P mouth, a pair low pressure hole with go out Oil T mouth communicates, and wherein oil-feed P mouth is oil-in, and at this, pressure is system pressure, and fuel-displaced T mouth is oil return opening；Cylinder barrel in valve body Inner hole wall symmetry offer a pair damping skewed slot that the shoulder with 2D piston matches (), the shoulder of 2D piston and cylinder Cylinder and be arranged between the concentric ring on the right side of 2D piston and form left sensitive cavity f and right sensitive cavity g, 2D piston is installed in cylinder barrel, A pair pressure hole and a pair low pressure hole on the shoulder of 2D piston are crossed to form four small opening surfaces with a pair damping skewed slot Long-pending flowed friction half-bridge in series, controls the change of left sensitive cavity pressure, and right sensitive cavity connection oil-feed P mouth is high pressure, left sensitivity Chamber and right sensitive cavity pressure controlled in flowed friction half-bridge, produced pressure differential drives 2D piston axially-movable；On spool Being provided with left part shoulder, right part shoulder and middle part shoulder, the left part shoulder correspondence oil-feed P mouth of spool, middle part shoulder is corresponding Controlling A mouth, the corresponding fuel-displaced T mouth of right part shoulder, left part shoulder, right part shoulder and middle part shoulder are with valve body inner bore slidably Ground seals and coordinates；(eyeing left from drive mechanism side) when 2D piston rotates clockwise, pressure hole intersects with damping skewed slot Area reduces, and trough increases with the area that intersects of damping skewed slot, and the most left sensitive cavity pressure reduces, and right sensitive cavity pressure is not Becoming, 2D piston moves to left.During moving to left, pressure hole increases with the area that intersects of damping skewed slot, trough and damping skewed slot Intersecting area to reduce, 2D piston is finally stable in a certain position, now both sides width between pressure hole, low pressure hole and damping skewed slot Unequal, 2D piston produces a power to the left, and this power acts on spring, makes spring be compressed.This spring force final with The power that control A mouth pressure acts on the left of spool balances each other.
Cylinder barrel 30 abuts against at the shoulder within valve body 3, and fastening steel ball 16 is pressed on cylinder barrel by valve inner chute Valve inner, and prevent it from producing radial rotating；Being provided with left pad and right pad between spool and 2D piston, spring is arranged on Between left pad and right pad, spool right-hand member contacts cooperation by the second steel ball 36 with right pad, and 2D piston left end passes through first Steel ball 33 contacts cooperation with left pad, and the axially-movable of 2D piston can be converted to the axially-movable of spool by spring.
Initial time, the right-hand member of right pad 32 is close on cylinder barrel 30, and the left end of right pad 32 contacts with spring 34；Valve Set 38 employing interference fit is installed on valve body 3 left end, and spool 39 is installed in valve pocket 38, uses interference fit peace at spool right-hand member Filling a spacer pin 37, spacer pin slides in the U-type groove of valve pocket, limits spool radial rotating, reduces because mismachining tolerance causes Pressure oscillation.
As shown in Figure 4, spool 39 left side is set to collar plate shape structure, when spool left and right mobile time, spool collar plate shape knot Forming squeeze film between structure and valve body and valve pocket, its effect is to introduce squeeze film damped coefficient, increases system viscosity Damping, improves damping ratio and makes the effect of system stability.
As it is shown in figure 5, drive mechanism module includes that spring keeps bar, electric magnet zero-bit to keep spring, spring shim, spring Retainer, upper driving lever and lower shift fork, spring retainer is arranged on connecting plate, spring retainer arranges described spring and keeps Bar, spring keeps socket on bar to arrange electric magnet zero-bit and keeps spring and spring shim, and upper driving lever one end connects rotary magnet Rotary shaft, upper driving lever other end clamping is arranged on spring and keeps on bar and between spring shim and spring retainer, on Driving lever can keep sliding on bar at spring.Upper driving lever connects one end of rotary magnet rotary shaft and is set to oval foreign steamer Exterior feature, the upper end of lower shift fork connects the 2D piston of valve body module with oval outline snap-fit engagement, the lower end of lower shift fork.
Specifically, the shifting block ovalize of upper driving lever lower half, the first half of lower shift fork is the U-shaped fork of opening upwards, on The shifting block of driving lever is plugged in the U-shaped fork of lower shift fork, and the rotary shaft of rotary magnet is fixing with upper driving lever to be connected, to drive upper dialling Bar drives lower shift fork to rotate, and the lower end of lower shift fork connects the 2D piston of valve body module, to drive 2D piston synchronous to rotate；Upper driving lever Top be slidably disposed in spring and keep on bar, and spring keeps one end of bar to be arranged with tilting to be pushed against down by upper driving lever Electric magnet zero-bit in shift fork keeps spring.In order to improve the job stability of Direct Action Type 2D Electric hydraulic pressure servo valve, balance is used Property power, need to be by the center superposition of the center of gravity of upper driving lever 15 and the 6th screw 14 Yu the rotary shaft of rotary magnet 5, and 2D piston The center of 31 overlaps with the center of gravity of lower shift fork 19 and the 8th screw 21.
Electromechanical transducer module includes rotary magnet, connecting plate and electric magnet protective cover, the electric rotating cooperated Magnet is positioned at valve body 3 upper end, and rotary magnet is connected with connecting plate 7 by the 3rd screw 6, and electric magnet protective cover passes through second Screw 4 is connected with connecting plate 7, and lid 26 is connected on electric magnet protective cover by the 5th screw 13 simultaneously.
Displacement sensor module includes LVDT displacement transducer, and its function is to monitor the axial displacement of 2D piston in real time, and Closed loop feedback is formed with the rotary magnet signal of telecommunication.The sensor mandrel 22 of LVDT displacement transducer be threaded connection bar 20 with 2D piston 31 is connected, and is maintained at the centre position of LVDT displacement transducer 23 endoporus, improves its accuracy.Sensor stand 24 It is arranged on connecting plate, between LVDT displacement transducer 23 and sensor stand 24, uses interference fit, in case pressure servo valve Produce between transport or vibrating state lower sensor and sensor stand and slide axially, affect its displacement detecting precision.
The implementation principle of this example is: as shown in Figure 6, when rotary magnet 5 no power, with turning of rotary magnet Upper driving lever 15 upper end that moving axis connects firmly abuts against spring under electric magnet zero-bit keeps the effect of spring 9 and keeps at the shoulder of bar 8, Lower shift fork 19 keeps static, makes 2D piston 31 be in zero-bit (about 2D piston, two sensitive cavity are in stress balance state).Just Beginning the moment, at the shoulder of spool left part, oil-feed P mouth and control A mouth are obstructed, if P with A communicates, then pressure oil enters spool Internal gutter and then enter into the sensitive cavity on the left of spool, produces the power promoting spool to move right, now P mouth and A mouth Passage be closed, spool is in right position all the time.When single direction rotation electric magnet 5 leads to forward current, upper driving lever 15 is by moment of face Rotate (seeing from right to left along connecting plate) counterclockwise, drive lower shift fork 19 to turn clockwise, drive 2D piston dextrorotation simultaneously Turning, so that low pressure hole c becomes big with damping skewed slot overlapping area, pressure hole b diminishes with damping skewed slot overlapping area, left sensitive cavity F pressure diminishes therewith, and right sensitive cavity pressure is constant, 2D piston 31 under the sensitive cavity differential pressure action of left and right to left movement, to the left During movement, making low pressure hole c diminish with damping skewed slot overlapping area, pressure hole b becomes big with damping skewed slot overlapping area, left Sensitive cavity pressure gradually rises, and in addition after spring 34 pressurized, 2D piston 31 produces a counteracting force to the right, and 2D piston stops A new equilbrium position；After spring 34 pressurized, produced power acts directly on spool 39 right-hand member, makes spool move to left, now P mouth connects with A mouth, and A mouth also connects with T mouth, is understood by changing the opening between P and A by Flow continuity equation Amount just can control the change of A mouth pressure；The axial displacement of 2D piston 31 monitored in real time by LVDT displacement transducer, and feeds back to unidirectional rotation Turn electric magnet, form closed loop feedback, accurately control 2D piston 31 displacement, thus adjust spool 39 displacement in real time, reach to control A mouth The purpose that pressure is constant.
Above-mentioned detailed description of the invention is used for explaining the present invention rather than limiting the invention, in the spirit of the present invention With in scope of the claims, any modifications and changes that the present invention is made, both fall within protection scope of the present invention.

Claims (9)

1. Direct Action Type 2D Electric hydraulic pressure servo valve, it is characterised in that by valve body module, electromechanical transducer module, drive mechanism mould Block and displacement sensor module composition, displacement sensor module matches with valve body module, and electromechanical transducer module is passed through Drive mechanism module matches with valve body module；Institute's displacement sensor modules monitors the displacement of 2D piston in valve body module in real time Closed loop feedback is constituted with the rotary magnet signal of telecommunication of electromechanical transducer module.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 1, it is characterised in that described valve body module includes valve Core, 2D piston, spring and valve body, 2D piston is arranged on the right side of valve body, and spool is arranged on the left side of valve body, and 2D piston is at valve body In have rotation and two directions of motion that slide axially；2D piston one end is provided with shoulder, shoulder coordinates and is provided with a pair high pressure Hole and a pair low pressure hole, a pair pressure hole communicates with oil-feed P mouth, and a pair low pressure hole communicates with fuel-displaced T mouth；In cylinder barrel in valve body Hole wall symmetry offers a pair damping skewed slot that the shoulder with 2D piston matches, the shoulder of 2D piston and cylinder barrel and be arranged on 2D Forming left sensitive cavity and right sensitive cavity between concentric ring on the right side of piston, 2D piston is installed in cylinder barrel, on the shoulder of 2D piston A pair pressure hole and a pair low pressure hole be crossed to form four small aperture area hydraulic pressure in series with a pair damping skewed slot Resistance half-bridge, controls the change of left sensitive cavity pressure, and right sensitive cavity connection oil-feed P mouth is high pressure, left sensitive cavity and right sensitive cavity Pressure controlled in flowed friction half-bridge, produced pressure differential drives 2D piston axially-movable；Spool be provided with left part shoulder, Right part shoulder and middle part shoulder, the left part shoulder correspondence oil-feed P mouth of spool, middle part shoulder correspondence controls A mouth, right part platform Takeing on corresponding fuel-displaced T mouth, left part shoulder, right part shoulder and middle part shoulder seal slidingly against with valve body inner bore and coordinate；Spool And between 2D piston, it being provided with left pad and right pad, spring is arranged between left pad and right pad, and spool right-hand member passes through steel Ball contacts cooperation with right pad, and 2D piston left end contacts cooperation by steel ball with left pad, and the axially-movable of 2D piston can be led to Cross spring and be converted to the axially-movable of spool.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 1, it is characterised in that described electromechanical transducer mould Block includes rotary magnet, connecting plate and the electric magnet protective cover cooperated；Described drive mechanism module includes that spring keeps Bar, electric magnet zero-bit keep spring, spring shim, spring retainer, upper driving lever and lower shift fork, and spring retainer is arranged on connection On plate, spring retainer arranges described spring and keeps bar, spring keep socket on bar arrange electric magnet zero-bit keep spring and Spring shim, upper driving lever one end connects the rotary shaft of rotary magnet, and upper driving lever other end clamping is arranged on spring and keeps on bar And between spring shim and spring retainer, upper driving lever can keep sliding on bar at spring；Upper driving lever connects electric rotating One end of magnet rotors axle is set to oval outline, the upper end of lower shift fork and oval outline snap-fit engagement, lower shift fork Lower end connect valve body module 2D piston.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 1, it is characterised in that institute's displacement sensor modules Including LVDT displacement transducer, the sensor mandrel of LVDT displacement transducer is threaded connection the 2D piston of bar and valve body module It is connected.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 2, it is characterised in that described valve body left end arranges one Valve pocket, spool is installed in valve pocket, uses interference fit to install a spacer pin limiting spool radial rotating at spool right-hand member, Spacer pin slides in the U-type groove of valve pocket.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 2, it is characterised in that described valve body side arranges end Lid, valve body opposite side arranges lid.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 5, it is characterised in that described spool left side is set to Collar plate shape structure, spool left and right mobile time spool collar plate shape structure and valve body and valve pocket between formed squeeze film.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 3, it is characterised in that the upper end of described lower shift fork is The U-shaped fork of opening upwards, U-shaped fork and oval outline snap-fit engagement.
Direct Action Type 2D Electric hydraulic pressure servo valve the most according to claim 4, it is characterised in that described LVDT displacement transducer It is arranged on sensor stand.
CN201610721751.1A 2016-08-25 2016-08-25 Direct Action Type 2D Electric hydraulic pressure servo valves Active CN106194879B (en)

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Application Number Priority Date Filing Date Title
CN201610721751.1A CN106194879B (en) 2016-08-25 2016-08-25 Direct Action Type 2D Electric hydraulic pressure servo valves

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Application Number Priority Date Filing Date Title
CN201610721751.1A CN106194879B (en) 2016-08-25 2016-08-25 Direct Action Type 2D Electric hydraulic pressure servo valves

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CN106194879A true CN106194879A (en) 2016-12-07
CN106194879B CN106194879B (en) 2018-01-05

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CN113217492A (en) * 2021-04-15 2021-08-06 浙大城市学院 Pressure-rotating coupling type electro-hydraulic proportional valve

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CN104791319A (en) * 2015-01-30 2015-07-22 浙江工业大学 Novel electric-hydraulic proportional overflow valve
CN105822795A (en) * 2016-05-23 2016-08-03 浙江工业大学 Inclined trough type 2D electro-hydraulic high-speed switching valve with variable transmission ratio transmission mechanism
CN206092566U (en) * 2016-08-25 2017-04-12 浙江工业大学 Direct action type 2D electro -hydraulic pressure servo valve

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CN102094865A (en) * 2009-12-11 2011-06-15 陈镇汉 Intelligent electrohydraulic flow servo valve
CN201621122U (en) * 2010-04-09 2010-11-03 北京航空航天大学 Hydraulic full-bridge spiral pilot servo valve driven by rotating voice coil motor
CN102650305A (en) * 2012-05-02 2012-08-29 浙江工业大学 2D hydraulic-power-assisted electro-hydraulic proportional reversing valve
CN104791319A (en) * 2015-01-30 2015-07-22 浙江工业大学 Novel electric-hydraulic proportional overflow valve
CN105822795A (en) * 2016-05-23 2016-08-03 浙江工业大学 Inclined trough type 2D electro-hydraulic high-speed switching valve with variable transmission ratio transmission mechanism
CN206092566U (en) * 2016-08-25 2017-04-12 浙江工业大学 Direct action type 2D electro -hydraulic pressure servo valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113217492A (en) * 2021-04-15 2021-08-06 浙大城市学院 Pressure-rotating coupling type electro-hydraulic proportional valve
CN113217492B (en) * 2021-04-15 2023-10-24 浙大城市学院 Pressure-rotation coupling type electrohydraulic proportional valve

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