CN108506263A - Plug-in two dimension servo valve with temperature compensating type damping piston - Google Patents
Plug-in two dimension servo valve with temperature compensating type damping piston Download PDFInfo
- Publication number
- CN108506263A CN108506263A CN201810497020.2A CN201810497020A CN108506263A CN 108506263 A CN108506263 A CN 108506263A CN 201810497020 A CN201810497020 A CN 201810497020A CN 108506263 A CN108506263 A CN 108506263A
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- Prior art keywords
- spool
- valve
- shoulder
- pressure
- damping piston
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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
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- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/078—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted and linearly movable closure members
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- 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
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
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- 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
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
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- 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
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
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- 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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Servomotors (AREA)
Abstract
Plug-in two dimension servo valve with temperature compensating type damping piston, including valve body module, electromechanical transducer module and position sensor module；Valve body module includes a 2D valve being made of spool, valve pocket, and spool is rotatable and is axially slidably placed in the hole in valve pocket；Spool 30 is set to be connect by connecting plate with electromechanical transducer module there are five shoulder valve pocket right end, and spool is connected with armature, and spool right end is connect by armature with electromechanical transducer module；The 4th right surface of shoulder is equipped with damping piston, and damping piston left side is encircled into organic formation damping cavity f with valve pocket and spool；It is exposed to pressure hole b on the right side of damping piston；It is had the gap between damping piston and valve pocket；Electromechanical transducer module uses torque-motor, spring one end to be connected with spring lever, and the other end is connected with fixed spring base on the shell；Displacement sensor module includes LVDT connecting rods and LVDT sensors.
Description
Technical field
The invention belongs to the electrohydraulic servo valves in Fluid-transmission and control field, especially design a kind of band temperature compensating type resistance
Two-dimentional (2D) servo valve of the plug-in of Buddhist nun's piston.
Background technology
Hydraulic valve of the inserted valve relative to other connection types has the advantages that many is not replaced such as sealed reliable, again
Amount is light, be easy to the system integration, processing remodeling is relatively easy etc..Therefore it is an important developing direction of hydraulic technique.
Electrohydraulic servo valve is mainly multistage valve arrangement, generally using the good Nozzle flapper valve of dynamic response, jet action valve
Add level-one guiding valve as the mode of main valve again as pilot valve, is fed back using between feedback rod realization grade between pilot valve and main valve.Due to
Its pilot stage and power stage are placed in parallel, so cannot achieve inserting.
2D servo valves utilize servo screw mechanism by valve pocket and spool organic composition so that the existing pilot control of spool and energy
Carry out power drive.So it is only the 1/ of conventional grade B servo valve that 2D servo valves, which have very high power weight ratio, small, weight,
3, lead control grade leakage it is small, also have high contamination resistance, be highly suitable for the space flight and aviation work high to power density requirements
Make occasion.
Due to the integrated design feature of 2D spools, i.e. pilot stage and power stage is integrated in two freedom of single 2D spools
On degree, meanwhile, torque-motor can be coaxially mounted to spool end with spool, plug-in mounting structure design can be carried out, to be formed
The higher two dimension inserting servo valve of integrated level.
Oil return opening is often opened in two shoulder both sides by traditional servo valves, and penetrates through two oil back chambers by valve core inside channel,
But this position of two-dimentional servo valve is replaced by high-pressure channel.For such case, the present invention opens up 4 in the middle part of valve pocket and uniformly divides
The drainback passage of cloth, and it is identical as T mouths, and the purpose is to allow two oil back chambers to be connected so that servo valve only needs an oil return opening.
The damping of 2D valve core of servo valve is smaller, when frequency increases, it is possible to resonance phenomena can occur.Its damping ratio is by two
Divide and constitutes：First, the damping ratio of control grade is led, it is mainly directly proportional to flow-pressure coefficient；Second is that the original damping of valve core of main valve, with
Viscous damping is directly proportional.If using control grade throttling is led, that is, the mode of flow gain is reduced, the damping of system can be increased really
Than, but response speed can be caused slack-off and the consequence of contamination resistance variation.If flowed using main valve grade gap, system is given
Increase a damping piston structure, that is, increases viscous damping to increase the damping ratio of system, response speed can't be influenced in this way.
But viscous damping and temperature have close contact, with the raising of temperature, viscosity can drastically decline, and damping can also drop
It is low.And space flight and aviation application field is very high to the operating temperature range requirement of valve, so needing to mend damping piston into trip temperature
It repays so that the offer damping that damping piston can be more stable during temperature change.
Invention content
The present invention will overcome the disadvantages mentioned above of the prior art, provide a kind of plug-in two with temperature compensating type damping piston
Tie up (2D) servo valve.
In order to further play the technical advantage of 2D servo valves, by fusion plug-in mounting structure design, the integrated of application is improved
Degree.And it further increases the stability of servo valve and reduces influence of the temperature to damping, the present invention provides a kind of band temperature
Two-dimentional (2D) servo valve of the plug-in of offset-type damping piston.It is in power-weight ratio, contamination resistance, integra-tion application and work
Making the big occasion of temperature range has great advantage.
The technical solution adopted by the present invention to solve the technical problems is：
Plug-in two dimension servo valve with temperature compensating type damping piston, including valve body module, electromechanical converter module
With position sensor module；；
Valve body module includes a 2D valve being made of spool 30, valve pocket 29, and spool 30 is rotatable and axially slidably
It is placed in the hole in valve pocket 29；Spool 30 is equipped with first shoulder 301, the second shoulder 302, third shoulder 303, the from left to right
305 5 four shoulders 304, the 5th shoulder shoulders；The valve pocket 29 is equipped with B mouthfuls, P mouthfuls, A mouthfuls, T mouthfuls, and wherein P mouthfuls is inlet,
With system pressure；Second shoulder 302, third shoulder 303 are located at B mouthfuls and A mouthfuls；5th shoulder 305 and concentric ring function
It is similar；Each shoulder seals slidingly against cooperation in valve body inner bore；
29 right end of valve pocket is connect by connecting plate 9 with electromechanical converter module, and spool 30 is connected with armature 14, spool
30 right ends are connect by armature 14 with electromechanical converter module；
Spool 30 is additionally provided with pressure hole a, pressure hole b, and high-pressure trough c is connected by the blind hole of valve core inside with two pressure hole of a, b
Logical, pressure hole a is connected by P mouthful with system oil sources, and perseverance is system pressure when work；Pressure hole b is located on the right side of the 4th shoulder, is led to
Cross the blind hole connection pressure hole a of valve core inside；Trough d is connected by T mouthfuls with oil return opening；
First shoulder 301 offers a pair of axisymmetric high pressure hole slot c and a pair of axisymmetric trough d, the high pressure
Slot c and trough d is in irregular parallelogram, and the bowstring of the high-pressure trough c is parallel with the bowstring of trough d；
Spool 30, valve pocket 29 and left end cap 2 constitute sensitive cavity e；301 shoulder of spool be equipped with two couples of symmetrical high-pressure trough c with
Trough d；The inner surface of valve pocket 29 outside the sensitive cavity e is equipped with a pair of axisymmetric skewed slot, one end and the sensitive cavity e of skewed slot
It is connected, the other end covers the region between the bowstring and the bowstring of trough d of adjacent high-pressure trough c, with high-pressure trough c and trough
D constitutes resistance half-bridge, and resistance half-bridge controls the pressure in sensitive cavity e by skewed slot；
4th shoulder, 304 right surface is equipped with damping piston 31, and 31 left side of damping piston is surrounded with valve pocket 29 and spool 30
At organic formation damping cavity f；31 right side of damping piston is exposed to pressure hole b；It is had the gap between damping piston 31 and valve pocket 29, it should
Gap area damping cavity f and pressure hole b；
Electromechanical converter module uses torque-motor, including shell 11, armature 14, permanent magnet 15, magnetizer 16, card
Part 19, motor housing 18, coil 22, motor pin 24, spring 25, spring lever 26, spring base 12, gag lever post 27；Shell 11 and horse
It is connect up to outer cover 18 with connecting plate 9, shell 11 is co-located by motor pin 24 and screw 13,25 one end of spring and spring lever
26 are connected, and the other end is connected with the spring base 12 being fixed on shell 11,
Displacement sensor module includes LVDT connecting rods 21, and LVDT sensors 20 are made of iron core 33 and coil rack 34；
LVDT sensors 20 coordinate with the circular arc of shell 11 and fastener 19, and fastener 19 compresses LVDT sensors 20；Spring lever 26 and LVDT
Connecting rod 21 connects mutual vertically；LVDT connecting rods 21 are connect with iron core 33, and iron core 33 uses gap with LVDT sensors 20
Cooperation, can be in 20 endoporus direct acting of LVDT sensors.
304 right end of shoulder is equipped with damping piston 31, the two interference fit.Valve pocket, pressure hole b and damping piston organically combine
Form damping cavity f.Damping can be provided in valve core movement, less impact improves stability.
The damping piston uses engineering plastics, utilizes its larger linear expansion coefficient --- in temperature change, damping
The each size of piston has large change to reduce influence of the temperature to damping, i.e. temperature-compensating relative to metal.
The valve pocket has been respectively mounted that O is close in each hydraulic fluid port both sides, ensures the partially sealed of servo valve.Described P, T, A, B are opened
Strainer is welded at mouthful respectively, ensures servo valve internal oil degree.
Oil return opening is often opened in two shoulder both sides by traditional servo valves, and penetrates through two oil back chambers by valve core inside channel,
But this position of two-dimentional servo valve is replaced by high-pressure channel.Therefore valve pocket is additionally provided with the oil return runner of four axial directions, for connecting
Low pressure hole T and two oil back chambers so that servo valve body only needs an oil return opening.
Electromechanical converter module uses torque-motor, including shell 11, armature 14, permanent magnet 15, magnetizer 16, card
Part 19, motor housing 18, coil 22, motor pin 24, spring 25, spring lever 26, spring base 12, gag lever post 27, headless screw 32
(shown in Fig. 7).Plug-in two dimension (2D) servo valve uses air-gap torque motor, so being removed in motor housing 18 and connecting plate 9
It also needs to place O-ring seal 10 by the connection of screw 17, output block be sealed to prevent fluid from entering around rank
Space around iron 14, coil 22 and permanent magnet 15.
Electromechanical converter module includes magnetic circuit part, running part and motor housing 18.Connecting plate 9 and the motor
Outer cover 18 is connected by 4 screws 17.Magnetic circuit part is by 2 armature 14 of magnetizer 16,1 of coil 22,2 and 2 permanent magnets
15 compositions.When coil no power, armature keeps balance；Coil energization will produce magnetic circuit line, the equilibrium state before destroying, armature
It deflects.Running part includes spring 25, spring base 12, spring lever 26, gag lever post 27 and motor pin 24 etc..Shell 11 simultaneously
With fastener 19 for fixed and locating element.When armature deflects, it can be rotated with movable valve plug and spring lever, it is characterised in that：
Spring one end is connected with the spring lever 26, on the other end and the spring base being threadedly secured on shell 11, in this way
The rotary motion of spring lever can be efficiently transferred on spring, be ensured in abnormal cases, spring self-zeroing, to make rank
Iron and spool return to initial position.
In order to further increase precision, valve is additionally provided with LVDT linear displacement transducers (by 34 groups of iron core 33 and coil rack
At) 20, LVDT connecting rods are connected through a screw thread with iron core 33, the iron core 33 is gap-matched with coil rack 34.Spool
When being subjected to displacement, spring lever and iron core can be driven for linear motion, the displacement of iron core will pass to control as electronic signals
Device forms closed-loop control.It is characterized in that：
Be using two LVDT sensors in order to realize double remaining functions, i.e., when a LVDT when something goes wrong, another
LVDT can continue to work normally, and improve the stability of 2D servo valves.
Beneficial effects of the present invention are mainly manifested in：1, pilot stage and power stage are integrated in single 2D using 2D servo valves
The characteristic of two freedom of motion of spool is combined together 2D servo valves with inserted valve so that plug-in two dimension (2D) is watched
It takes valve and possesses higher application integration degree, the power density ratio of bigger, stronger contamination resistance relative to traditional servo valves；2、
The oil return runner that four axial directions are opened on valve pocket, for connecting low pressure hole T and two oil back chambers so that servo valve body only needs
One oil return opening；3, the damping piston of one engineering plastics material with temperature-compensating is set on the shoulder of spool right end,
Damping cavity is formed with valve pocket, damping can be not only provided, increase the stability of system, also temperature-compensating, i.e., with temperature
Variation, damping do not have greatly changed；4, spool and armature are connected, and compensate for the transmission mechanism of conventional two-dimensional (2D) servo valve
Complexity, structure is more simple；5, just there is preferable feedback in the spiral servo mechanism of valve itself, if in order to further increase essence
Degree may be used LVDT and collect and feed back spool displacement, forms closed-loop control.
Description of the drawings
Fig. 1 is the principle schematic diagram of the present invention.
Fig. 2 is 0 ° of sectional view of spool shown in FIG. 1.
Fig. 3 is 45 ° of sectional views of valve pocket shown in FIG. 1 (seeing from left to right clockwise).
Fig. 4 is 0 ° of sectional view of valve body module shown in FIG. 1.
Fig. 5 is the enlarged drawing at P shown in Fig. 4.
Fig. 6 a~Fig. 6 b are that shell shown in FIG. 1 is fixedly connected with figure with connecting plate, and wherein Fig. 6 a are stereoscopic schematic diagram, Fig. 6 b
It is axial view.
Fig. 7 a~Fig. 7 b are that spool shown in FIG. 1 is fixedly connected with figure with armature, and wherein Fig. 7 a are stereoscopic schematic diagrams, and Fig. 7 b are
Axial sectional view.
Fig. 8 a~Fig. 8 b are LVDT connecting device for sensor figure shown in FIG. 1, and wherein Fig. 8 a are stereoscopic schematic diagrams, and Fig. 8 b are
Axial sectional view.
Fig. 9 is the fundamental diagram of two-dimentional (2D) servo valve of plug-in.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Fig.1~Fig. 9, a kind of two-dimentional (2D) servo valve of the plug-in with temperature compensating type damping piston, including valve body
Module, electromechanical converter module and position sensor module.
Wherein valve body module includes spool 30, valve pocket 29, damping piston 31, valve pocket pin 1, left end cap 2, strainer 4, connecting plate
9；Electromechanical converter module uses torque-motor, including shell 11, armature 14, permanent magnet 15, magnetizer 16, fastener 19, horse
Up to outer cover 18, coil 22, motor pin 24, spring 25, spring lever 26, spring base 12, gag lever post 27, headless screw 32；Displacement passes
Sensor module includes LVDT connecting rods 21, LVDT (being made of iron core 33 and coil rack 34) 20, meanwhile, plug-in two dimension (2D)
Servo valve further includes O-ring seal 3,5,6,7,8,10,28, screw 13,17,23.
Valve body module includes a 2D valve being made of spool 30, valve pocket 29, and spool 30 is rotatable and axially slidably
It is placed in the hole in valve pocket 29.Spool 30 is equipped with first shoulder 301, the second shoulder 302, third shoulder 303, the from left to right
305 5 four shoulders 304, the 5th shoulder shoulders.The valve pocket 29 is equipped with B mouthfuls, P mouthfuls, A mouthfuls, T mouthfuls, and wherein P mouthfuls is inlet,
With system pressure.Second shoulder 302, third shoulder 303 are located at B mouthfuls and A mouthfuls；5th shoulder 305 and concentric ring function
It is similar；Each shoulder seals slidingly against cooperation, 2~4 μm of unilateral gap in valve body inner bore；29 right end of valve pocket by connecting plate 9 with
Electromechanical converter module connects, and 30 right end of spool is connect by armature 14 with electromechanical converter module.Spool 30 and rank
Iron 14 is connected, and compensates for the complexity of the transmission mechanism of conventional two-dimensional (2D) servo valve, structure is more simple.
As shown in Fig. 2, spool 30 is additionally provided with pressure hole a, pressure hole b, the blind hole and a, b that high-pressure trough c passes through valve core inside
Two pressure holes are connected to, and pressure hole a is connected by P mouthful with system oil sources, and perseverance is system pressure when work；Pressure hole b is located at the 4th
On the right side of shoulder, pressure hole a is connected to by the blind hole of valve core inside.Trough d is connected by T mouthfuls with oil return opening.
4th shoulder, 304 right surface is equipped with damping piston 31, as shown in figure 4, damping piston 31 is interference fitted with spool 30,
It is encircled into organic formation damping cavity f on the left of damping piston 31 and with valve pocket 29 and spool 30；31 right side of damping piston is exposed to height
Press hole b；It is had the gap between damping piston 31 and valve pocket 29, the gap area damping cavity f and pressure hole b.When spool moves to left, resistance
Buddhist nun's chamber f becomes smaller, and oil liquid pressure can become larger, and there are pressure difference (the pressure ratio damping cavity f of pressure hole b is small), pressure in piston damping both sides
It is poor on the one hand to directly act on damping piston, to spool there are one thrust to the right, on the other hand fluid can be made along gap
It is flowed from from damping cavity f to pressure hole b, also there are one frictional force to prevent damping piston from being moved to the left for meeting in flow process.
Vice versa.So the setting of damping cavity f primarily to can not only provide damping, increases the stability of system, it is also warm
Degree compensation, i.e., with the variation of temperature, damping does not have greatly changed.
In formula：The dynamic viscosity of μ --- fluid；
The diameter of D --- piston；
The diameter of d --- spool；
The length of l --- piston；
h0--- the gap of piston and valve pocket.
In formula：Dynamic viscosity when μ (t) --- oil liquid temperature is t DEG C；
μ0--- fluid is t in temperature0DEG C when dynamic viscosity；
The viscosity coefficient of λ --- fluid.
The dynamic viscosity of damping and fluid that damping piston 31 provides, the diameter and length, the diameter of spool, piston of piston
It is related with the gap of valve pocket (as shown in Equation 1).Meanwhile the dynamic viscosity of fluid is very big (such as 2 institute of formula with the eustasy of temperature
Show), so the variation of temperature can also influence the damping of the offer of damping piston 31.So the material of damping piston 31 uses engineering plastic
Material, engineering plastics can not only provide intensity and toughness similar with metal material, can also provide larger linear expansion coefficient, can
Between diameter, length and damping piston and valve pocket to change damping piston 31 by the principle of heat shrinkage in temperature change
Gap makes servo valve remain stable state during temperature change to reduce influence of the temperature to damping.
It should be noted that the damping piston of offset-type of the present invention is suitable for the wide occasion of operating temperature range, but one
A little operating ambient temperature ranges are little, when not needing temperature-compensating, can be directly made of metal material, this also belongs to the present invention
Content.
Servo screw mechanism is to realize that valve core of servo valve corner leads control structure with what axial straight-line displacement was converted.Spool 30,
Valve pocket 29 and left end cap 2 constitute sensitive cavity e.301 shoulder of spool is equipped with two couples of symmetrical high-pressure trough c and trough d.Valve pocket simultaneously
29 are equipped with a pair of symmetrical skewed slot, one end of skewed slot and sensitive cavity in the contact position of high-pressure trough c and trough d with spool 30
E is connected, and the other end constitutes resistance half-bridge with height indent c and d, and resistance half-bridge controls the pressure in sensitive cavity e by skewed slot.It is quick
The very little that sense chamber e can be designed is to reach higher hydraulic natural frequency, so that order Oscillating link is to the dynamic of spool 30
State response is nearly free from influences, and the response of the axial displacement of spool 30 between its rotational angle displacement does not generate oscillation, can be simple
Turn to inertia link.
Plug-in two dimension (2D) servo valve is three-position four-way valve, and high-pressure mouth P, low pressure port T and work are provided on valve pocket 29
Mouthful A, B, P, T, A, B each mouth are uniformly distributed four in one week in valve pocket.It is respectively mounted the O in the both sides hydraulic fluid port P, T, A, B
Type sealing ring (selecting HB4-56-1987) 3,5,6,7,8, while in 9 outer diameter recess of connecting plate and spool 30 and connecting plate 9
Diameter contact position also mounting O-shaped sealing ring 10,28.Ensure the partially sealed property of servo valve by O-ring seal.The strainer 4
It is welded on the opening of P, T, A, B hydraulic fluid port, ensures the cleannes of servo valve internal oil with this, to improve the stabilization of servo valve
Property.
As shown in figure 3, oil return opening is often opened in two shoulder both sides by traditional servo valves, and two are penetrated through by valve core inside channel
A oil back chamber, but this position of two-dimentional servo valve is replaced by high-pressure channel.Therefore valve pocket is additionally provided with the oil return runner of four axial directions,
For connecting low pressure hole T and two oil back chambers so that servo valve body only needs an oil return opening.The shape of drainback passage uses
Sector, to reduce the pressure loss of the fluid by 29 upper runner of valve pocket.
Electromechanical converter module uses torque-motor, including shell 11, armature 14, permanent magnet 15, magnetizer 16, card
Part 19, motor housing 18, coil 22, motor pin 24, spring 25, spring lever 26, spring base 12, gag lever post 27, headless screw 32
(shown in Fig. 7).Plug-in two dimension (2D) servo valve uses air-gap torque motor, so being removed in motor housing 18 and connecting plate 9
It also needs to place O-ring seal 10 by the connection of screw 17, output block be sealed to prevent fluid from entering around rank
Space around iron 14, coil 22 and permanent magnet 15.
Shell 11 is fixedly connected as shown in figures 6 a and 6b with connecting plate 9.It can be seen from the figure that shell 11 with connect
Plate 9 is co-located by motor pin 24 and screw 13, and wherein motor pin 24 is in order to ensure that shell 11 and connecting plate 9 do not occur relatively
Rotation, screw 13 in order to fixing shell 11 and connecting plate 9 axial position.25 one end of spring is connected with spring lever 26, the other end
It is connected with the spring base 12 being threadedly secured on shell 11, the rotary motion of such spring lever 26 can be effectively transmitted to
On spring 25, and in abnormal cases, spring 25 has auto Zero Function.
Spool 30 is fixedly connected with armature 14 as shown in Fig. 7 a~Fig. 7 b.Armature 14 is interference fitted with spring lever 26, together
When headless screw 32 make spring lever 26 there are one downward pretightning forces to realize tight fit to armature 14, can ensure in armature in this way
Spring lever 26 and spool 30 can be driven to rotate after 14 rotations.30 right part of spool is provided with annular knurl, increases armature 14 with this
With the frictional force between spool 30.
Displacement sensor module includes LVDT connecting rods 21, and LVDT sensors (are made of) iron core 33 and coil rack 34
20.As shown in Fig. 8 a~Fig. 8 b, LVDT sensors 20 coordinate with the circular arc of shell 11 and fastener 19, make fastener 19 by screw 23
LVDT sensors 20 are compressed, to achieve the purpose that fixed LVDT sensors 20.Spring lever 26 passes through spiral shell with LVDT connecting rods 21
Nail connects, and ensures the verticality of the two by outer-hexagonal.LVDT connecting rods 21 are connected through a screw thread with iron core 33, iron core 33
It is gap-matched with sensor, it can be in sensor endoporus direct acting.In the torque-motor course of work, armature 14 drives spring lever
26 and spool 30 rotate (unilateral 0.7 °), in conjunction with 2D servo screw principles, spool will be for linear motion, at the same drive spring lever and
Iron core is for linear motion, and in conjunction with LVDT principles, the displacement of iron core 33 will be transmitted to controller as electronic signals, to realize
The closed-loop control of spool displacement.
This example is by taking two-dimentional (2D) servo valve of plug-in of 6mm is in valve core diameter as an example, furtherly in conjunction with attached drawing 1~9
It is bright.
The operation principle of the present embodiment：In the initial state, controller no power, torque-motor do not provide rotating signal,
Body portion right chamber is connected to by a, b aperture with system pressure, and area is the half of sensitivity e chambers.And the pressure of sensitive cavity e
The concatenated hyrodynamic resistance half-bridge control of two minor arc areas intersected with the skewed slot of 29 inner surface of valve pocket by height indent c, d
System.The pressure of sensitive cavity e is the half of system pressure at this time, and spool 30 keeps static balance, and two mouthfuls of A, B is obstructed, no output.When
Torque-motor provides the rotating signal of one (seeing from left to right) counterclockwise, and armature 14 is connected with spool 30, the band movable valve plug inverse time
Needle rotates (seeing from left to right), and the intersecting area of high-pressure trough c and skewed slot is reduced, and the intersecting area of trough d and skewed slot increases, quick
The pressure for feeling chamber e is reduced, and 30 disequilibrium of spool, spool moves to left, and B mouthfuls are connected to high pressure chest, and A mouthfuls are connected to low pressure chamber, is formed
Output.And damping cavity f is when spool 30 moves to left, pressure can become smaller, and the pressure difference on piston both sides and the gap flowing of fluid can carry
It prevents spool from moving to left for a power to the right, that is, a damping is provided.Height indent c, d are again heavy during spool 30 moves to left
The new both sides for returning to skewed slot, thus the balance of retentivity again, while LVDT can collect the displacement for leading to iron core 33 by spool 30,
Displacement is passed into controller by electric signal, realizes the closed-loop control of spool displacement.Vice versa.
Above-mentioned specific implementation mode is used for explaining the present invention, rather than limits the invention, in the spirit of the present invention
In scope of the claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (4)
1. the plug-in two dimension servo valve with temperature compensating type damping piston, including valve body module, electromechanical converter module and
Position sensor module；
Valve body module includes a 2D valve being made of spool (30), valve pocket (29), and spool (30) is rotatable and can slide axially
Ground is placed in the hole in valve pocket (29)；Spool (30) is equipped with first shoulder (301), the second shoulder (302), third from left to right
(305) five shoulder (303), the 4th shoulder (304), the 5th shoulder shoulders；The valve pocket (29) is equipped with B mouthfuls, P mouthfuls, A mouthfuls, T
Mouthful, wherein P mouthfuls is inlet, has system pressure；Second shoulder (302), third shoulder (303) are located at B mouthfuls and A mouthfuls；
5th shoulder (305) is similar to concentric ring function；Each shoulder seals slidingly against cooperation in valve body inner bore；
Valve pocket (29) right end is connect by connecting plate (9) with electromechanical converter module, and spool (30) is connected with armature (14),
Spool (30) right end is connect by armature (14) with electromechanical converter module；
Spool (30) is additionally provided with pressure hole a, pressure hole b, and high-pressure trough c is connected to by the blind hole of valve core inside with two pressure hole of a, b,
Pressure hole a is connected by P mouthfuls with system oil sources, and perseverance is system pressure when work；Pressure hole b is located on the right side of the 4th shoulder, is passed through
The blind hole connection pressure hole a of valve core inside；Trough d is connected by T mouthfuls with oil return opening；
First shoulder (301) offers a pair of axisymmetric high-pressure trough c and a pair of axisymmetric trough d, the high-pressure trough c and
Trough d is in irregular parallelogram, and the bowstring of the high-pressure trough c is parallel with the bowstring of trough d；
Spool (30), valve pocket (29) and left end cap (2) constitute sensitive cavity e；Spool (301) shoulder is equipped with two pairs of symmetrical high-pressure troughs
C and trough d；The inner surface of valve pocket (29) outside the sensitive cavity e is equipped with a pair of axisymmetric skewed slot, one end of skewed slot with it is quick
Feel chamber e to be connected, the other end covers the region between the bowstring and the bowstring of trough d of adjacent high-pressure trough c, with high-pressure trough c and
Trough d constitutes resistance half-bridge, and resistance half-bridge controls the pressure in sensitive cavity e by skewed slot；
4th shoulder (304) right surface is equipped with damping piston (31), on the left of damping piston (31) with valve pocket (29) and spool
(30) it is encircled into organic formation damping cavity f；It is exposed to pressure hole b on the right side of damping piston (31)；Damping piston (31) and valve pocket
(29) it is had the gap between, the gap area damping cavity f and pressure hole b；
Electromechanical converter module uses torque-motor, including shell (11), armature (14), permanent magnet (15), magnetizer
(16), fastener (19), motor housing (18), coil (22), motor pin (24), spring (25), spring lever (26), spring base
(12), gag lever post (27)；Shell (11) and motor housing (18) are connect with connecting plate (9), and shell (11) passes through motor pin
(24) co-located with screw (13), spring (25) one end is connected with spring lever (26), the other end be fixed on shell (11)
Spring base (12) be connected,
Displacement sensor module includes LVDT connecting rods (21), and LVDT sensors (20) are by iron core (33) and coil rack (34) group
At；LVDT sensors (20) coordinate with the circular arc of shell (11) and fastener (19), and fastener (19) compresses LVDT sensors (20)；Bullet
Spring base (26) is connect mutual vertically with LVDT connecting rods (21)；LVDT connecting rods (21) are connect with iron core (33), iron core (33)
It is gap-matched with LVDT sensors (20), it can be in LVDT sensors (20) endoporus direct acting.
2. the plug-in two dimension servo valve with temperature compensating type damping piston as described in claim 1, it is characterised in that：Damping
Piston (31) uses engineering plastics.
3. the plug-in two dimension servo valve with temperature compensating type damping piston as described in claim 1, it is characterised in that：Using
Two LVDT sensors (20).
4. the plug-in two dimension servo valve with temperature compensating type damping piston as described in claim 1, it is characterised in that：Valve pocket
(29) drainback passage there are four setting.
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| CN201810497020.2A CN108506263B (en) | 2018-05-22 | 2018-05-22 | Plug-in two dimension servo valve with temperature compensating type damping piston |
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| CN201810497020.2A CN108506263B (en) | 2018-05-22 | 2018-05-22 | Plug-in two dimension servo valve with temperature compensating type damping piston |
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| CN109555741A (en) * | 2018-11-12 | 2019-04-02 | 温州大学 | A kind of damping semibridge system pilot control switch valve |
| CN109578361A (en) * | 2019-01-22 | 2019-04-05 | 江苏钧微动力科技有限公司 | A kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve |
| CN110319242A (en) * | 2019-08-05 | 2019-10-11 | 安徽理工大学 | A kind of rotary spool switching mechanism based on bidirectional torsion spring |
| CN110873207A (en) * | 2019-11-28 | 2020-03-10 | 河南航天液压气动技术有限公司 | Two-dimensional electromagnetic valve |
| CN111457130A (en) * | 2019-01-22 | 2020-07-28 | 浙江工业大学 | Miniature integrated two-dimensional electromagnetic switch valve |
| CN111457127A (en) * | 2019-01-22 | 2020-07-28 | 浙江工业大学 | Two-dimensional pilot-operated electromagnetic cartridge valve |
| CN112324945A (en) * | 2020-11-26 | 2021-02-05 | 金陵科技学院 | High-pressure flow electro-hydraulic servo valve based on ultrasonic motor control and control method |
| CN113339347A (en) * | 2021-06-24 | 2021-09-03 | 河南航天液压气动技术有限公司 | High-pressure high-response plug-in type electro-hydraulic proportional reversing valve |
| CN114251485A (en) * | 2021-12-13 | 2022-03-29 | 浙江工业大学 | Two-dimensional servo valve with double sensitive cavities |
| CN114321054A (en) * | 2021-12-30 | 2022-04-12 | 浙江工业大学 | Two-dimensional proportional electrohydraulic piston |
| CN114483686A (en) * | 2021-12-13 | 2022-05-13 | 浙江工业大学 | Two-dimensional switch electrohydraulic piston |
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Cited By (15)
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|---|---|---|---|---|
| CN109555741A (en) * | 2018-11-12 | 2019-04-02 | 温州大学 | A kind of damping semibridge system pilot control switch valve |
| CN109578361A (en) * | 2019-01-22 | 2019-04-05 | 江苏钧微动力科技有限公司 | A kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve |
| CN111457130A (en) * | 2019-01-22 | 2020-07-28 | 浙江工业大学 | Miniature integrated two-dimensional electromagnetic switch valve |
| CN111457127A (en) * | 2019-01-22 | 2020-07-28 | 浙江工业大学 | Two-dimensional pilot-operated electromagnetic cartridge valve |
| CN109578361B (en) * | 2019-01-22 | 2024-04-12 | 江苏钧微动力科技有限公司 | Novel screw thread cartridge formula rotatory electric liquid servo valve that directly drives |
| CN110319242B (en) * | 2019-08-05 | 2024-03-26 | 安徽理工大学 | Rotary valve core switching mechanism based on bidirectional torsion spring |
| CN110319242A (en) * | 2019-08-05 | 2019-10-11 | 安徽理工大学 | A kind of rotary spool switching mechanism based on bidirectional torsion spring |
| CN110873207A (en) * | 2019-11-28 | 2020-03-10 | 河南航天液压气动技术有限公司 | Two-dimensional electromagnetic valve |
| CN112324945A (en) * | 2020-11-26 | 2021-02-05 | 金陵科技学院 | High-pressure flow electro-hydraulic servo valve based on ultrasonic motor control and control method |
| CN113339347A (en) * | 2021-06-24 | 2021-09-03 | 河南航天液压气动技术有限公司 | High-pressure high-response plug-in type electro-hydraulic proportional reversing valve |
| CN114483686A (en) * | 2021-12-13 | 2022-05-13 | 浙江工业大学 | Two-dimensional switch electrohydraulic piston |
| CN114251485A (en) * | 2021-12-13 | 2022-03-29 | 浙江工业大学 | Two-dimensional servo valve with double sensitive cavities |
| CN114251485B (en) * | 2021-12-13 | 2024-05-03 | 浙江工业大学 | Two-dimensional servo valve with double sensitive cavities |
| CN114321054A (en) * | 2021-12-30 | 2022-04-12 | 浙江工业大学 | Two-dimensional proportional electrohydraulic piston |
| CN114321054B (en) * | 2021-12-30 | 2024-05-03 | 浙江工业大学 | Two-dimensional proportional electrohydraulic piston |
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