CN205781059U - The electro-hydraulic high-speed switch valve of chute type 2D with variable ratio drive mechanism - Google Patents
The electro-hydraulic high-speed switch valve of chute type 2D with variable ratio drive mechanism Download PDFInfo
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- CN205781059U CN205781059U CN201620477140.2U CN201620477140U CN205781059U CN 205781059 U CN205781059 U CN 205781059U CN 201620477140 U CN201620477140 U CN 201620477140U CN 205781059 U CN205781059 U CN 205781059U
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Abstract
With the electro-hydraulic high-speed switch valve of chute type 2D of variable ratio drive mechanism, including valve body, drive the drive mechanism that valve body is opened and the Zero maintaining mechanism driving valve body to close；Oil suction chamber connects with the oil-in on valve body, and oil suction chamber is connected by the oil through on spool with spool；Pressure hole connects with spool, and sensitive cavity is connected with oil suction chamber with skewed slot by oil through, pressure hole；Sensitive cavity is connected with going out oil pocket by trough, skewed slot, and goes out oil pocket and connect with the oil-out on valve body；Second shoulder length vertically is more than the diameter of oil-out, and oil-out is positioned on the movement locus of the second shoulder；The lower half of upper driving lever extends in the U-shaped fork of lower shift fork, and the rotary shaft of rotating machinery is fixing with upper driving lever to be connected, and upper driving lever is tilted to be pushed against in lower shift fork by upper driving lever back-moving spring；The right side of valve body is provided with the Zero maintaining mechanism forcing valve body to keep zero-bit.
Description
Technical field
This utility model relates to a kind of switch valve, particularly relates to the oblique of band variable ratio drive mechanism
The electro-hydraulic high-speed switch valve of grooved 2D.
Background technology
High-speed switch valve has become the important directions of Electro hydraulic Digital Control technology development, extensively applies
In the purposes such as aerospace field, hydraulic locking, engineering machinery and military affairs.In recent years,
High-speed switch valve is as a pith of Electro hydraulic Digital Control technology and electric as realizing
The numerically controlled key element of liquid, has higher requirement to it, i.e. must have high pressure resistant,
The advantages such as fast response time, flow are big, good seal performance.
At present, high-speed switch valve is frequently with ball-valve type, side valve type and cone valve type valve core structure form.
Ball-valve type valve core structure is simple, processing performance good, action is sensitiveer, stroke is short and dynamic
Can be preferable, but spool is easily affected by hydraulic power, can only make little latus rectum valve.Side valve type spool is easy
Obtain flow force compensation and hydro-cushion, but spool stroke is short, low-response, processing technique and dress
Join that precision is low, poor sealing performance, can only be at some to flow, pressure and sealing property requirement
Select under low occasion.Relatively both compare cone valve type spool, can overcome side valve type spool stroke
The problems such as short leakage rate is big, it is also possible to the problem such as overcome the hydraulic power of ball-valve type spool uneven,
And there is the features such as fast response time, oil filling capacity is strong, good seal performance, contamination resistance are strong.
But when being used in the special environment such as high pressure, high frequency sound for this type of valve, should ensure reliable
Sealing property ensure that spool is not stuck again, high to requirement on machining accuracy, processing technique
Difficulty is big, and manufacturing cost is high, is unfavorable for the extensive application of this type of valve.
In recent years, the electro-hydraulic high-speed switch valve of 2D utilizing servo screw mechanism principle to work has
Spool radial rotating and the double freedom moved axially, control are flexibly, precision is high, frequency response is fast,
Low-hysteresis, leakage rate are little, advantages of simple structure and simple, are currently mainly used in Aero-Space, lead
Military fields such as bullet and mostly being under extreme environment.When the control to the electro-hydraulic high-speed switch valve of 2D
During device processed energising, utilize electromechanical converter to convert the electrical signal to mechanical signal, and transmit
To mechanical transmission mechanism, the driving moment exported by electromechanical converter is amplified and band movable valve plug
Rotate.But, relatively big to the spool difficulty of processing of this type of valve, the through hole that spool is provided with is at height
Under pressure, high vibration, the impact to spool is relatively big, reduces the rigidity of spool, easily rolls in through hole
Disconnected；And the plug of spool afterbody is easily rushed out in the case of hypertonia, cause valve body overall
Structural damage.And under high pressure, " clamping " phenomenon of spool is easily caused flow and cannot rise.
Summary of the invention
For overcoming the problems referred to above, this utility model provides the oblique of a kind of band variable ratio drive mechanism
The electro-hydraulic high-speed switch valve of grooved 2D.
The technical solution of the utility model is:
With the electro-hydraulic high-speed switch valve of chute type 2D of variable ratio drive mechanism, including valve originally
Body, the drive mechanism that driving valve body is opened and the Zero maintaining mechanism driving valve body closedown；
Valve body includes the servo screw mechanism being made up of valve body and spool, spool rotatably arranged with
In valve body, spool is sequentially provided with first shoulder, the second shoulder and the 3rd shoulder from left to right,
Airtight for body cavity enclosure is become sensitive cavity by the left end cap of valve body and first shoulder, first shoulder and
Airtight for body cavity enclosure cyclization is gone out oil pocket around the annular of spool by the second shoulder, the second shoulder and
3rd shoulder by airtight for body cavity enclosure cyclization around the annular oil suction chamber of spool；
Oil suction chamber connects with the oil-in on valve body, and oil suction chamber passes through leading on spool with spool
Oilhole connects；Have a pair axisymmetric pressure hole in first shoulder and a pair axisymmetric
Trough, and pressure hole and trough be arranged alternately, pressure hole connects with spool, valve body interior
Wall is provided with a pair axisymmetric skewed slot, and one end of skewed slot connects with sensitive cavity, another of skewed slot
End is positioned on the movement locus of pressure hole and the movement locus of trough, and sensitive cavity is by logical oil
Hole, pressure hole connect with oil suction chamber with skewed slot；
Sensitive cavity is connected with going out oil pocket by trough, skewed slot, and goes out oil pocket and going out on valve body
Hydraulic fluid port connects；Second shoulder length vertically is more than the diameter of oil-out, so that the second shoulder
Fully seal oil-out when spool is positioned at closed mode, and oil-out is positioned at the fortune of the second shoulder
On dynamic track；
It is arranged on the drive mechanism on the right side of valve body include directly on top upper driving lever and be positioned at
The lower shift fork of underface, the lower half ovalize of upper driving lever, the first half of lower shift fork is opening
U-shaped fork upwards, the lower half of upper driving lever extends in the U-shaped fork of lower shift fork, and rotation sets
Standby rotary shaft is fixing with upper driving lever to be connected, to drive upper driving lever to drive lower shift fork to rotate, and under
The bottom of shift fork is fixing with the right-hand member of spool to be connected, with band movable valve plug synchronous axial system；Upper driving lever
Top is slidably disposed on horizon bar, and one end of horizon bar is arranged with and is pushed against by upper driving lever
At the upper driving lever back-moving spring of zero-bit, upper driving lever is tilted to be pushed against by upper driving lever back-moving spring to be set aside
In fork；
The right-hand member of spool runs through valve body, and the right side of valve body is provided with and forces valve body to keep zero-bit
Zero maintaining mechanism, described Zero maintaining mechanism includes the valve core reset bullet being set on spool
Spring, one end of valve core reseting spring is pushed against on the right flank of the 3rd shoulder, forces the second shoulder
Being positioned at above oil-out and seal hydraulic fluid port, the other end is pushed against the jump ring being solidly set on spool
On.
Further, described rotating machinery is rotary magnet.
Further, being provided with high-pressure trough at the port of export of described pressure hole, pressure hole passes through high pressure
Groove connects with skewed slot, and the distance between trough with high-pressure trough is equal with the width of skewed slot.
Further, the right side of valve body is provided with connection seat, and Zero maintaining mechanism is arranged on connection seat
In, drive mechanism is arranged on the connecting plate connected above seat, and described connection seat is close by first
Seal is tightly connected with valve body.
Further, the right-hand member of spool is tightly connected with being connected seat by the second sealing ring；Left end
Lid is tightly connected with valve body by the 3rd sealing ring.
Further, the left end of valve core reseting spring is pushed against the right side of the 3rd shoulder by spring base
On face, and the right-hand member end of valve core reseting spring is pushed against on jump ring by spring pad, spring base and
The equal fixed cover of spring pad is located on spool.
Further, upper driving lever back-moving spring is pushed against on upper driving lever by pad, and described pad can
It is slidably arranged on described horizon bar.
Further, the chute type 2D of band variable ratio drive mechanism as claimed in claim 6
Electro-hydraulic high-speed switch valve, it is characterised in that: described connection seat and connecting plate are furnished with lid.
Further, described rotary magnet is arranged on the top of valve body, and is furnished with protective cover.
Further, described upper driving lever passes through first screws clamp output shaft at rotary magnet
On, described lower shift fork passes through the second screws clamp on spool.
Technology of the present utility model is contemplated that:
In order to make the electro-hydraulic high-speed switch valve of 2D have big flow, high frequency sound characteristic, except to protect
Card electromechanical converter i.e. rotary magnet has outside fast response characteristic, also should ensure that servo
The axial displacement of spool of screw mechanism to having the characteristic of quickly response between rotational angle displacement, this
Outer mechanical transmission mechanism also to meet the relatively large driving force square provided needed for spool operating.
Servo screw mechanism is to realize switch valve spool corner and leading that axial straight-line displacement is changed
Control structure.Valve interior wall left end has skewed slot, and skewed slot g communicates with sensitive cavity f, the of spool
Two are had to axisymmetric high-pressure trough 1311 and trough b on one shoulder.High-pressure trough 1311 He
Trough b be all cross section be the groove of irregular parallelogram like, high-pressure trough 1311 He
Trough b is positioned at the both sides of skewed slot g, and the distance of high-pressure trough 1311 and trough b is with oblique
Groove width is equal, to increase area gradient, meets the 2D big flow of electro-hydraulic high-speed switch valve, high frequency
The requirement rung.Spool is rotatably mounted in valve body, one end of skewed slot g and sensitive cavity f phase
Logical, the other end constitutes resistance half-bridge with high-pressure trough 1311 and trough b, and resistance half-bridge passes through
Skewed slot g controls the pressure in sensitive cavity f.
In order to ensure that the electro-hydraulic high-speed switch valve of 2D has the characteristic of big flow, high frequency sound, it is necessary to
Ensure that rotational angle displacement can be made quickly by the axial displacement of spool of hydraulic servo screw mechanism
Response, hydraulic servo screw mechanism natural frequency depends on spool end sensitive cavity f volume and valve
Core quality, the construction features of the electro-hydraulic high-speed switch valve of 2D determines its sensitive cavity f and can design
The least, thus its hydraulic natural frequency is the highest, about 104～105Hz.The highest hydraulic pressure
Natural frequency makes order Oscillating not interfere with the dynamic response of spool, the axially-movable of spool
Response on the angular signal of input does not results in impact, and order Oscillating can be simplified to inertia rings
Joint.
Because the natural frequency of hydraulic servo screw mechanism is the highest, the high-pressure trough 1311 of design and low
Indent b uses plus lap mode, covering amount 0.003～0.007mm, it is ensured that lead with skewed slot
Control level zero leakage amount is the least, improves the conversion essence between spool corner displacement and axial displacement
Degree, and poppet shaft can be made very big to rigidity, it is effectively improved 2D electro-hydraulic high-speed switch valve work
Reliability and stability when making.
Chute type hydraulic servo screw mechanism has the highest automatically cleaning ability.If high-pressure trough
The one side in the 1311 and trough b parallelogram regions constituted with skewed slot is blocked, then
The dynamic balance of spool will be destroyed, and spool just carries out axially-movable, blocks in motor process
Area increases, can effective removing obstacles thing, contamination resistance is strong.
In order to improve response speed of the present utility model, it is necessary to improve the driving driving valve core rotation
Moment.The drive mechanism of design can make spool obtain infinitely-great driving moment when starting working.
Gear ratio between the shift fork driving lever of design is infinitely great, power output after rotary magnet energising
Square, amplifies driving moment infinite times by shift fork driving lever drive mechanism and drives the quick footpath of spool
To rotating and moving axially, to overcome hydraulic card clamping force, improve the contamination resistance of valve, reduce
Spool machining accuracy.This drive mechanism may be equally applied to the electro-hydraulic speed-sensitive switch of 3-position 4-way 2D
Valve.
The beneficial effects of the utility model are:
1, have employed chute type hydraulic servo screw mechanism, with the height of irregular parallelogram
Indent and trough are simple with area increased gradient, fast response time and processing；
2, use the drive mechanism of variable ratio, effectively amplify the driving moment of spool, with gram
Take the hydraulic card clamping force at spool, reduce the input torque requirement to electromechanical converter simultaneously；
3, frequency response is fast, and dynamic property is good；
4, it is little that Zero maintaining mechanism rotary inertia is little, zero-bit leads control leakage rate, and precision is high；
5, simple in construction, processing cost is low；
6, low to oil filtrating required precision, contamination resistance is strong.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present utility model.
Fig. 2 is the enlarged diagram of high-pressure trough and trough.
Fig. 3 is the structural representation of spool.
Fig. 4 is servo screw mechanism principle schematic.
Fig. 5 be in Fig. 4 E-E to sectional view.
Fig. 6 is drive mechanism structural representation.
Detailed description of the invention
As it can be seen, the electro-hydraulic high-speed switch valve of chute type 2D of band variable ratio drive mechanism,
Including valve body, drive the drive mechanism that valve body is opened and the zero-bit guarantor driving valve body to close
Hold mechanism；
Valve body includes the servo screw mechanism being made up of valve body 22 and spool 13, spool 13
Be rotatably arranged in valve body 22, spool 13 be sequentially provided with from left to right first shoulder 131,
Second shoulder 132 and the 3rd shoulder 133, the left end cap 24 of valve body 22 and first shoulder 131
The valve body 22 airtight enclosure of inner chamber is become sensitive cavity f, first shoulder 131 and the second shoulder 132
Valve body 22 inner chamber airtight enclosure cyclization is gone out oil pocket m, the second shoulder around the annular of spool 13
132 and the 3rd shoulder 133 valve body 22 inner chamber airtight enclosure cyclization is entered around the annular of spool 13
Oil pocket n；
Oil suction chamber n connects with the oil inlet P on valve body 22, and oil suction chamber n and spool 13
Connected by the oil through c on spool 13；One is had countershaft right in first shoulder 131
The pressure hole a claimed and a pair axisymmetric trough b, and pressure hole and trough be arranged alternately,
Pressure hole a connects with spool 13, and the inwall of valve body 22 is provided with a pair axisymmetric skewed slot g,
One end of skewed slot g connects with sensitive cavity f, and the other end of skewed slot g is positioned at the motion of pressure hole a
On the movement locus of track and trough b, sensitive cavity f by oil through c, pressure hole a and
Skewed slot g connects with oil suction chamber n；
Sensitive cavity f connect with going out oil pocket m by trough b, skewed slot g, and go out oil pocket m and
Oil-out A connection on valve body 22；Second shoulder 132 length vertically is more than oil-out
The diameter of A, so that the second shoulder 132 fully seals out when spool 13 is positioned at closed mode
Hydraulic fluid port A, and oil-out A is positioned on the movement locus of the second shoulder 132；
It is arranged on the drive mechanism on the right side of valve body and includes directly on top upper driving lever 10 and position
In the lower shift fork 12 of underface, the lower half ovalize of upper driving lever 10, lower shift fork 12
The first half is the U-shaped fork of opening upwards, and the lower half of upper driving lever 10 extends to lower shift fork 12
U-shaped fork in, the rotary shaft of rotating machinery is fixing with upper driving lever 10 to be connected, to drive above group
Bar 10 drives lower shift fork 12 to rotate, and the right-hand member of the bottom of lower shift fork 12 and spool 13 is fixed
Connect, with band movable valve plug 13 synchronous axial system；The top of upper driving lever 10 is slidably disposed in water
On flat bar 2, and one end of horizon bar 2 be arranged with upper driving lever 10 is pushed against zero-bit upper group
Bar back-moving spring 5, upper driving lever 10 is tilted to be pushed against lower shift fork 12 by upper driving lever back-moving spring 5
In；
The right-hand member of spool 12 runs through valve body 22, and the right side of valve body 22 is provided with and forces valve body 22
Keeping the Zero maintaining mechanism of zero-bit, described Zero maintaining mechanism includes being set on spool 12
Valve core reseting spring 19, one end of valve core reseting spring 19 is pushed against the 3rd shoulder 133
On right flank, the second shoulder 132 is forced to be positioned at above oil-out A and seal hydraulic fluid port A,
The other end is pushed against on the jump ring 17 being solidly set on spool 13.
Described rotating machinery is rotary magnet 9.
Be provided with high-pressure trough 1312 at the port of export of described pressure hole a, pressure hole a by high-pressure trough with
Skewed slot connects, and the width of the distance between trough 1311 and high-pressure trough 112 and skewed slot g
Equal.
The right side of valve body 22 is provided with connection seat, and Zero maintaining mechanism is arranged in connection seat, passes
Motivation structure is arranged on the connecting plate 1 connected above seat, and described connection seat passes through the first sealing ring
21 are tightly connected with valve body 22,
The right-hand member of spool 13 is tightly connected with being connected seat by the second sealing ring 16.
The left end of valve core reseting spring 19 is pushed against the right side of the 3rd shoulder 133 by spring base 20
On side, and the right-hand member end of valve core reseting spring 19 is pushed against jump ring 17 by spring pad 18
On, spring base 20 and the equal fixed cover of spring pad 18 are located on spool 13.
Upper driving lever back-moving spring 5 is pushed against on driving lever 10 by pad 4, described pad 4
It is slidably disposed on described horizon bar 2.
Left end cap 24 is tightly connected with valve body 22 by the 3rd sealing ring 23.
Described connection seat and connecting plate are furnished with lid 11.
Described rotary magnet 9 is arranged on the top of valve body 22, and is furnished with protective cover 26.
Described upper driving lever 10 is clamped on the output shaft of rotary magnet 9 by the first screw 8,
Described lower shift fork 12 is clamped on spool 13 by the second screw 14.
Rotary magnet 9 is connected with controller.
Described rotary magnet 9, as electromechanical converter of the present utility model, is positioned at valve body
Above in the of 22, and being connected with connecting plate 1 by the first screw 28, protective cover 26 passes through the
Two screws 27 are connected with connecting plate 1, and lid 11 is connected to protect by the 3rd screw 3 simultaneously
On guard shield 26, the support 7 of horizon bar 2 is fixed on connecting plate 1 by the 3rd screw 6,
Left end cap 24 is fixed on valve body 22 by the 4th screw 25.
(1) servo screw mechanism:
Servo screw mechanism is to realize switch valve spool corner and leading that axial straight-line displacement is changed
Control mechanism, it includes that valve body 22 and spool 13, spool 13, valve body 22 and left end cap 24 are joined
Close constitute sensitive cavity f, high-pressure trough 1311 with the cross section of trough b in the most parallel four limits
Shape, high-pressure trough 1311 and trough b lay respectively at the both sides of skewed slot, and high-pressure trough 1311 He
Distance between trough b is equal with the width of skewed slot g, and to increase area gradient, reduction adds
Work technology difficulty, it is achieved meet the 2D big flow of electro-hydraulic high-speed switch valve, the requirement that frequency response is fast.
One end of skewed slot g communicates with sensitive cavity f, the other end and high-pressure trough 1311 and trough b structure
Becoming resistance half-bridge, resistance half-bridge controls the pressure in sensitive cavity f by skewed slot g.
When spool 13 is positioned at zero-bit (when this utility model is positioned at closed mode), second
The side of shoulder 132 fully seals oil-out A, and one end of skewed slot g covers high-pressure trough 1311 simultaneously
With trough b, and both area coverages are equal, and the other end of skewed slot g is with sensitive cavity f even
Logical.
Fluid is in oil inlet P enters oil suction chamber n, and the pressure in oil suction chamber n is p1, oil-feed
Fluid in the n of chamber is in oil through c enters spool 22, and spills into height from pressure hole a
In indent 1311, the fluid in high-pressure trough 1311 is in skewed slot g enters sensitive cavity f, quick
Fluid in sense chamber f is in skewed slot g enters trough b, and enters out oil pocket from trough b
In m, owing to oil-out A seals, fluid will not outflow, if do not consider friction when static state
Power and the impact of valve port hydraulic power, high-pressure trough 1311, trough b intersect respectively with skewed slot g
Area equation, the pressure in sensitive cavity f only has the pressure (system pressure) in oil suction chamber n
Half, but the cross section setting sensitive cavity f is 2 times of cross section of oil suction chamber n, then valve
The pressure at the two in core 13 lays respectively at sensitive cavity f and in oil suction chamber n is equal, spool 13
Axially retaining static balance, switch valve is in zero-bit state.
If spool 13 rotates, then high-pressure trough 1311 and trough b and valve body 22 on spool 13
The crossing area of upper skewed slot g changes, thus causes the pressure of sensitive cavity f to change, spool
The stress balance of 13 is destroyed, and spool 13 produces axially-movable therewith.
As shown in Figure 4, when drive mechanism drives spool 13 to rotate clockwise, high-pressure trough 1311
The area intersected with skewed slot g reduces, and the area that trough b and skewed slot g intersects increases, and causes
The pressure of sensitive cavity f reduces, and spool 13 is to left movement, then the second shoulder 132 is from oil-out A
On remove, valve is opened, fluid flow out.If spool 13 continues to rotate counterclockwise, high-pressure trough
1311 are gradually increased again with the area that intersects of skewed slot g, the intersection of trough b and skewed slot g
Long-pending it is gradually reduced, until high-pressure trough 1311 and skewed slot g's intersects area, trough b with oblique
When the crossing area of groove g is the most equal, spool 13 axial force balance, spool 13 stop motion,
Reenter poised state；Otherwise, when spool 13 counterclockwise rotates, above change
Process is just the opposite.Therefore, this utility model is that the two-stage with double freedom of motion is opened at a high speed
Closing valve, be linear relationship between spool angular displacement and axially displacement, this utility model utilizes and rotates
Electric magnet and drive mechanism drive spool to rotate, it is achieved pilot valve function, at oil liquid pressure
Spool is promoted to move axially under the effect of difference, it is achieved the high-speed opening and closing of valve port.
(2) drive mechanism
The rotation amplitude of rotary magnet 9 is 21 °, and rotary magnet 9 drives upper driving lever 10
Rotate counterclockwise, then go up driving lever 10 and drive lower shift fork 12 and spool 13 to rotate clockwise, high
The area that indent 1311 intersects with skewed slot g reduces, the area that trough b intersects with skewed slot g
Increase, cause the pressure of sensitive cavity f to reduce, spool 13 to left movement, then the second shoulder 132
Removing from oil-out A, oil-out A is unimpeded, and fluid flows out, thus at this utility model
In open mode.
But frictional force, hydraulic power, greasy dirt and spool valve body machining accuracy etc. all can turn at spool
Dynamic moment produces bigger resistance, hydraulic pressure " clamping stagnation " phenomenon easily occurs, in order to make this practicality
Novel occurring without hydraulic pressure " clamping stagnation " phenomenon, drive mechanism must have bigger starting moment
Moment.
Drive mechanism of the present utility model can realize torque-variable, the lower half of upper driving lever 10 in
Ellipse, to realize variable ratio, owing to the rotation amplitude of rotary magnet 9 is 21 °, for
Convenient for assembly, and realize the symmetric design of upper driving lever 10, the initial installation of upper driving lever 10
Driving lever 10 and lower shift fork 12 center of rotation line 21 ° in position (i.e. zero-bit state) deviation,
Upper driving lever 10 coordinates for linear contact lay between lower shift fork 12, and upper driving lever 10 and lower shift fork 12
Intersect at R point and S point respectively, as shown in Figure 5.Now, the normal of contact point R is just
Through the center of rotation of upper driving lever 10, according to " Kennedy-Aronhold the-orem ", upper driving lever 10 and lower shift fork 12
Relative instantaneous center overlap, the instantaneous transmission ratio of drive mechanism be infinity, lower shift fork 12 is to upper
The response of driving lever 10 is equivalent to a shock response, and output torque is the biggest, it is sufficient to overcome hydraulic pressure
" clamping stagnation " phenomenon.
Along with the continuation campaign of upper driving lever 10, relative instantaneous center is to the center of rotation of lower shift fork 12
Close.From instantaneous theorem, upper driving lever 10 is each autorotation with the gear ratio of lower shift fork 12
Center is to the inverse ratio of instantaneous distance, and therefore gear ratio reduces therewith, but is sufficient for spool 13
Rotating torque required after startup.
Compared with existing stable drive ratio drive mechanism, drive mechanism of the present utility model is in fortune
Move and initially will produce infinitely-great moment, to overcome the electro-hydraulic high-speed switch valve of 2D easily to be rubbed
Hydraulic pressure " the card that spool is produced by the problems such as power, hydraulic power, greasy dirt and spool valve body machining accuracy
Stagnant " phenomenon.
For ensureing to make spool 13 still in the case of the controller of switch valve is not powered on or lost efficacy
Zero-bit can be in, horizon bar 2 is installed shift fork back-moving spring 5, back-moving spring 5, level
Bar 2 and pad 4 constitute the position-limit mechanism of upper shift fork.Upper shift fork can rotate counterclockwise upon actuation,
And oppress upper shift fork back-moving spring 5, when upper shift fork turns to maximum position and stops by pad 4
After spline is dynamic, upper shift fork and back-moving spring 5 are in resting state, when controller power-off,
Shift fork back-moving spring 5 drives upper shift fork to reset.
In order to improve job stability of the present utility model, balance inertial force, need to be by upper driving lever
10 and first center superposition of armature spindle of center of gravity and rotary magnet 9 of screw 8, and
Spool 13 central shaft overlaps with the center of gravity of lower shift fork 12 and the second screw 14.
(3) Zero maintaining mechanism
Equipped with jump ring 17, spring pad 18, valve core reseting spring 19 and spring base on spool 13
20, to prevent switch valve spool 13 play inside valve body 22 in transportation, it is ensured that adjust
When zero, spool 13 does stable axially-movable, prevents from colliding with valve body 22, and protects simultaneously
Card spool in the case of controller is not powered on is in absolute zero position.
The moment that valve body is opened, spool is moved to the left, and oppresses valve core reseting spring 19,
When controller power-off, back-moving spring 19 drives spool 13 to move right and recovers zero-bit, this
Utility model is closed.
In Fig. 1, T is oil return opening.
Content described in this specification embodiment is only the way of realization to utility model design
Enumerate, protection domain of the present utility model is not construed as being only limitted to what embodiment was stated
Concrete form, protection domain of the present utility model also includes that those skilled in the art are according to this practicality
Novel design it is conceivable that equivalent technologies means.
Claims (10)
1. the electro-hydraulic high-speed switch valve of chute type 2D of band variable ratio drive mechanism, it is special
Levy and be: include valve body, the drive mechanism driving valve body to open and drive valve body to close
Zero maintaining mechanism；
Valve body includes the servo screw mechanism being made up of valve body and spool, and spool sets rotationally
Putting in valve body, spool is sequentially provided with first shoulder, the second shoulder and the 3rd shoulder from left to right,
Airtight for body cavity enclosure is become sensitive cavity by the left end cap of valve body and first shoulder, first shoulder and
Airtight for body cavity enclosure cyclization is gone out oil pocket around the annular of spool by the second shoulder, the second shoulder and
3rd shoulder by airtight for body cavity enclosure cyclization around the annular oil suction chamber of spool；
Oil suction chamber connects with the oil-in on valve body, and oil suction chamber passes through leading on spool with spool
Oilhole connects；Have a pair axisymmetric pressure hole in first shoulder and a pair axisymmetric
Trough, and pressure hole and trough be arranged alternately, pressure hole connects with spool, valve body interior
Wall is provided with a pair axisymmetric skewed slot, and one end of skewed slot connects with sensitive cavity, another of skewed slot
End is positioned on the movement locus of pressure hole and the movement locus of trough, and sensitive cavity is by logical oil
Hole, pressure hole connect with oil suction chamber with skewed slot；
Sensitive cavity is connected with going out oil pocket by trough, skewed slot, and goes out oil pocket and going out on valve body
Hydraulic fluid port connects；Second shoulder length vertically is more than the diameter of oil-out, so that the second shoulder
Fully seal oil-out when spool is positioned at closed mode, and oil-out is positioned at the fortune of the second shoulder
On dynamic track；
It is arranged on the drive mechanism on the right side of valve body include directly on top upper driving lever and be positioned at
The lower shift fork of underface, the lower half ovalize of upper driving lever, the first half of lower shift fork is opening
U-shaped fork upwards, the lower half of upper driving lever extends in the U-shaped fork of lower shift fork, and rotation sets
Standby rotary shaft is fixing with upper driving lever to be connected, to drive upper driving lever to drive lower shift fork to rotate, and under
The bottom of shift fork is fixing with the right-hand member of spool to be connected, with band movable valve plug synchronous axial system；Upper driving lever
Top is slidably disposed on horizon bar, and one end of horizon bar is arranged with and is pushed against by upper driving lever
At the upper driving lever back-moving spring of zero-bit, upper driving lever is tilted to be pushed against by upper driving lever back-moving spring to be set aside
In fork；
The right-hand member of spool runs through valve body, and the right side of valve body is provided with force valve body to keep zero-bit zero
Position maintaining body, described Zero maintaining mechanism includes the valve core reseting spring being set on spool,
One end of valve core reseting spring is pushed against on the right flank of the 3rd shoulder, forces the second shoulder to be positioned at
Above oil-out and seal hydraulic fluid port, the other end is pushed against on the jump ring being solidly set on spool.
2. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 1
Speed switch valve, it is characterised in that: described rotating machinery is rotary magnet.
3. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 2
Speed switch valve, it is characterised in that: it is provided with high-pressure trough, pressure hole at the port of export of described pressure hole
Connected with skewed slot by high-pressure trough, and the width of the distance between trough and high-pressure trough and skewed slot
Equal.
4. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 3
Speed switch valve, it is characterised in that: the right side of valve body is provided with connection seat, and Zero maintaining mechanism is arranged
Within connecting seat, drive mechanism is arranged on the connecting plate connected above seat, and described connection seat leads to
Cross the first sealing ring to be tightly connected with valve body.
5. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 4
Speed switch valve, it is characterised in that: the right-hand member of spool passes through the second sealing ring and is connected the airtight company of seat
Connect；Left end cap is tightly connected with valve body by the 3rd sealing ring.
6. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 5
Speed switch valve, it is characterised in that: the left end of valve core reseting spring is pushed against the 3rd by spring base
On the right flank of shoulder, and the right-hand member end of valve core reseting spring is pushed against jump ring by spring pad
On, spring base and the equal fixed cover of spring pad are located on spool.
7. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 6
Speed switch valve, it is characterised in that: upper driving lever back-moving spring is pushed against on upper driving lever by pad,
Described pad is slidably disposed on described horizon bar.
8. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 7
Speed switch valve, it is characterised in that: described connection seat and connecting plate are furnished with lid.
9. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 8
Speed switch valve, it is characterised in that: described rotary magnet is arranged on the top of valve body, and is furnished with
Protective cover.
10. the electro-hydraulic height of chute type 2D of band variable ratio drive mechanism as claimed in claim 9
Speed switch valve, it is characterised in that: described upper driving lever passes through the first screws clamp at rotary magnet
Output shaft on, described lower shift fork by the second screws clamp on spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620477140.2U CN205781059U (en) | 2016-05-23 | 2016-05-23 | The electro-hydraulic high-speed switch valve of chute type 2D with variable ratio drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620477140.2U CN205781059U (en) | 2016-05-23 | 2016-05-23 | The electro-hydraulic high-speed switch valve of chute type 2D with variable ratio drive mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205781059U true CN205781059U (en) | 2016-12-07 |
Family
ID=58116291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620477140.2U Withdrawn - After Issue CN205781059U (en) | 2016-05-23 | 2016-05-23 | The electro-hydraulic high-speed switch valve of chute type 2D with variable ratio drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205781059U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
-
2016
- 2016-05-23 CN CN201620477140.2U patent/CN205781059U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105822795B (en) * | 2016-05-23 | 2018-11-13 | 浙江工业大学 | The electro-hydraulic high-speed switch valves of chute type 2D with variable ratio transmission mechanism |
| 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 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20181113 |