CN105465454B - Two-way big flow type electro-hydraulic proportion reversing valve - Google Patents
Two-way big flow type electro-hydraulic proportion reversing valve Download PDFInfo
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- CN105465454B CN105465454B CN201610048930.3A CN201610048930A CN105465454B CN 105465454 B CN105465454 B CN 105465454B CN 201610048930 A CN201610048930 A CN 201610048930A CN 105465454 B CN105465454 B CN 105465454B
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- connecting portion
- elastic helix
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- spool
- elastic
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Classifications
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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
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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
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
Abstract
The invention discloses a kind of two-way big flow type electro-hydraulic proportion reversing valve, including reversal valve, two proportion electro-magnets and two pressures to turn round shaft coupling；Each proportion electro-magnet is respectively by pressing torsion shaft coupling to be connected with spool；Pressure, which turns round shaft coupling, includes first connecting portion, second connecting portion, two the first elastic helix parts, two the second elastic helix parts and installing plates；First elastic helix part is oppositely oriented with the second elastic helix part, and first connecting portion, second connecting portion, the first elastic helix part, the second elastic helix part and installing plate are integrated.The beneficial effects of the practice of the present invention is：The electro-hydraulic proportion reversing valve turns round the structure of shaft coupling using pressure, when armature promotes second connecting portion towards valve core movement, first elastic helix part and the second elastic helix part produce relative torsion to drive first connecting portion rotary motion, it has the advantages that easy without friction transmission, flexible and process and assemble.
Description
Technical field
The present invention relates to electro-hydraulic proportional control system field, more specifically to a kind of two-way electro-hydraulic ratio of big flow type
Example reversal valve.
Background technology
Electro-hydraulic proportional valve is to use proportional control technique, a kind of liquid between switch type hydraulic valve and electrohydraulic servo valve
Press element.Since electro-hydraulic proportional valve can be combined with electronic control unit, thus easy to be transported to various inputs, output signal
Calculation is handled, to realize complicated control function.Meanwhile electro-hydraulic proportional valve is excellent with antipollution, low cost and fast response time etc.
Point, has been widely used in the industrial production.
Existing electro-hydraulic proportion reversing valve can generally use Direct Action Type and lead the designing scheme of two kinds of structures of control type.Direct Action Type
Electro-hydraulic proportion reversing valve directly drives spool movement by proportion electro-magnet, its is simple in structure, and can work under zero pressure, but
Big flow control can not be realized due to being limited by proportion electro-magnet thrust output.Control type electro-hydraulic proportion reversing valve is led by pilot valve control
The pressure change of main valve sensitive cavity processed, produces larger hydraulic static pressure-driven main valve plug movement, it is possible to achieve and big flow controls,
But its is complicated, and it can not lead zero and work under governor pressure.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of the prior art, there is provided a kind of high-pressure high-flow,
And two-way big flow type electro-hydraulic proportion reversing valve simple in structure.
The technical solution adopted by the present invention to solve the technical problems is：Construct a kind of two-way big flow type electric-hydraulic proportion
Reversal valve, including reversal valve, two proportion electro-magnets for being connected to the reversal valve both ends, and two pressures turn round shaft coupling
Device；The reversal valve includes valve body, and the spool in the valve body；Each proportion electro-magnet includes housing,
And the armature in the housing；Two pairs of left end high pressures of radial symmetric distribution are offered on the spool left end shoulder
Hole, two pairs of left end pressure holes communicate for P mouthfuls with system pressure mouth；The spool right end offers symmetrical with two pairs of left end pressure holes
Two pairs of right end pressure holes, two pairs of right end pressure holes communicate for P mouthfuls with system pressure mouth；The valve inner, which offers, left experiences passage
Experience passage with right, it is described it is left experience passage and communicated with spool left end sensitive cavity, it is described that right to experience passage sensitive with spool right end
Chamber communicates；It is described left to experience passage and two pairs of left end pressure holes when the electro-hydraulic proportion reversing valve is in the initial position of balance
Form the first transfer area, it is described right to experience passage and two pairs of right end pressure holes form the second transfer areas, the first transfer area
It is identical with the second transfer area；
Each proportion electro-magnet is turned round shaft coupling by the pressure respectively and is connected with the spool；Each pressure turns round connection
First connecting portion that axis device includes being fixedly connected with the spool, the second connecting portion being fixedly connected with the armature, two the
One elastic helix part, two the second elastic helix parts, and the installing plate being fixedly mounted on the valve body；First connection
Portion, the second connecting portion, the first elastic helix part, the second elastic helix part, and the installing plate are integrated
Change structure；Two the first elastic helix parts are connected between the first connecting portion and the second connecting portion, and two
A second elastic helix part is connected between the second connecting portion and the installing plate；
The first connecting portion and the second connecting portion are the cylinder being coaxially disposed；The first elastic helix part
Rotation direction is oppositely oriented with the second elastic helix part；The rotation direction of two the first elastic helix parts is identical, and on institute
State the axis of first connecting portion axisymmetricly；The rotation direction of two the second elastic helix parts is identical, and connects on described first
The axis of socket part is axisymmetricly；Two the first elastic helix parts are in the second connecting portion close to the first connecting portion
End face forms the first projection, and two the second elastic helix parts are in the second connecting portion close to the end of the first connecting portion
Face forms the second projection, and first projection is in the described second projection；
When the armature promotes the second connecting portion towards the valve core movement, two the first elastic helix parts
Relative torsion is produced with two the second elastic helix parts to drive the first connecting portion rotary motion.
In two-way big flow type electro-hydraulic proportion reversing valve of the present invention, the number of turns of the first elastic helix part with
The number of turns of the second elastic helix part is identical.
In two-way big flow type electro-hydraulic proportion reversing valve of the present invention, the number of turns of the first elastic helix part is
~0.48 circle of 0.45 circle.
In two-way big flow type electro-hydraulic proportion reversing valve of the present invention, the installing plate includes the plate in square
Body, and it is opened in the through hole at the plate body center；The first connecting portion can in the through hole stretching motion.
In two-way big flow type electro-hydraulic proportion reversing valve of the present invention, the electro-hydraulic proportion reversing valve further includes set
Sleeve mounted in the outside of the second elastic helix part；One end of the sleeve is fixedly connected with the installing plate, the set
The other end of cylinder is connected with the housing.
In two-way big flow type electro-hydraulic proportion reversing valve of the present invention, the sleeve is square structure；The side
Shape structure offers through hole, and the second elastic helix part is placed in the through hole.
Implement the two-way big flow type electro-hydraulic proportion reversing valve of the present invention, have the advantages that：The electric-hydraulic proportion
Reversal valve turns round the structure of shaft coupling using pressure, when armature promotes second connecting portion towards valve core movement, two first elastic spiral shells
Rotating part and two the second elastic helix parts produce relative torsion to drive first connecting portion rotary motion, so that the straight line by armature
Movement is changed into the rotary motion of spool, compared with other electro-hydraulic proportional valves, the electro-hydraulic proportion reversing valve have transmitted without friction,
It is flexible, the advantages that small and process and assemble is easy；Secondly as the rotation direction of the first elastic helix part and the second elastic helix
Part it is oppositely oriented, amplification spool stroke can be played, increase valve metered flow effect；Furthermore because it is in operating pressure
Zero or during decompression, since spool axial resistance is almost nil at this time, spool can be pushed directly on by proportion electro-magnet completely, is played
The characteristics of direct-acting valve, therefore conventional pilot control level electro-hydraulic proportion reversing valve can be overcome to need to lead the shortcomings that pressure is provided separately in control level,
Make hydraulic system more simple；Finally, by varying the first elastic helix part helix angle tangent value and the second elastic helix part
The ratio of helix angle tangent value, can facilitate the multiple of design displacement enlargement.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the internal structure signal for the two-way big flow type electro-hydraulic proportion reversing valve that present pre-ferred embodiments provide
Figure；
Fig. 2 is the A portions enlarged drawing in Fig. 1；
Fig. 3 is that two pressures in the electro-hydraulic proportion reversing valve shown in Fig. 1 turn round the knot that shaft coupling is connected with spool, armature respectively
Composition；
Fig. 4 is the three-dimensional structure diagram of the pressure torsion shaft coupling in the electro-hydraulic proportion reversing valve shown in Fig. 1；
Fig. 5 is another three-dimensional structure diagram of the pressure torsion shaft coupling in the electro-hydraulic proportion reversing valve shown in Fig. 1；
Fig. 6 is the cut-away view of the pressure torsion shaft coupling in the electro-hydraulic proportion reversing valve shown in Fig. 1；
Fig. 7 is the partial sectional view of the pressure torsion shaft coupling in the electro-hydraulic proportion reversing valve shown in Fig. 1；
Fig. 8 is degree of the disturbing schematic diagram of the second elastic helix part in the electro-hydraulic proportion reversing valve shown in Fig. 1.
Embodiment
In order to which the technical features, objects and effects of the present invention are more clearly understood, now compare attached drawing and describe in detail
The embodiment of the present invention.In the description of the present invention, it is to be understood that term " first ", " second ", " left end ",
" right end " etc. is only used for description purpose, and it is not intended that instruction or hint relative importance.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, presently preferred embodiments of the present invention provides a kind of two-way big
Flow type electro-hydraulic proportion reversing valve, it includes reversal valve 1, proportion electro-magnet 2, pressure and turns round shaft coupling 3, and sleeve 4.
Specifically, as shown in Figure 1, Figure 2 and shown in Fig. 3, which includes valve body 11, and in valve body 11
Spool 12.Two pairs of left end pressure holes 121 of radial symmetric distribution, two pairs of left end pressure holes are offered on the 12 left end shoulder of spool
121 with system pressure mouth P mouthfuls communicate, the respectively actuator port of A mouthfuls and B mouthful, T mouthfuls are oil return hydraulic fluid port.12 right end of spool opens up
Have with two pairs of left end pressure holes, 121 symmetrical two pairs of right end pressure holes 123, two pairs of right end pressure holes 123 are equally and system pressure
P mouthfuls of mouth communicates.Offered inside the valve body 11 it is left experience passage 122 and it is right experience passage 124, when electro-hydraulic proportion reversing valve is in
During the initial position of balance, this is left to experience passage 122 and two pairs of left end pressure holes 121 form the first transfer areas, the right impression
Passage 124 and two pairs of right end pressure holes 123 form the second transfer area, and the first transfer area is identical with the second transfer area.
The proportion electro-magnet 2 is provided with two, and two proportion electro-magnets 2 are connected to the both ends of reversal valve 1.Each ratio
Example electromagnet 2 includes housing 21, and the armature 22 in housing 21.In the present embodiment, each proportion electro-magnet difference
By pressing torsion shaft coupling 3 to be connected with spool 12.Proportion electro-magnet 2 is structure common in the art, and details are not described herein.
If Fig. 4, Fig. 5, Fig. 6 and Fig. 7 are simultaneously as shown in fig.1, the pressure turns round shaft coupling 3 for by proportion electro-magnet 2
The linear motion of armature 22 is changed into the rotary motion of the spool 12 in reversal valve 1.Pressure turn round shaft coupling 3 include first connecting portion 31,
Second connecting portion 32, the first elastic helix part 33, the second elastic helix part 34 and installing plate 35.First connecting portion 31, second
Connecting portion 32, the first elastic helix part 33, the second elastic helix part 34 and installing plate 35 are integrated, its globality knot
Structure is preferable, relatively simple during electro-hydraulic proportion reversing valve described in assembly and disassembly.In the present embodiment, pressure is turned round shaft coupling 3 and can be beaten using 3D
The mode of print is processed.
Wherein, such as Fig. 4, Fig. 5, Fig. 6 and Fig. 7 and as shown in fig.1, the first connecting portion 31 and the fixation of spool 12 company
Connect, which is fixedly connected with armature 22, and first connecting portion 31 and second connecting portion 32 are the cylinder being coaxially disposed
Body, the outside diameter of first connecting portion 31 are less than the outside diameter of second connecting portion 32.
The first elastic helix part 33 is connected between first connecting portion 31 and second connecting portion 32, namely the first elastic spiral shell
Rotating part 33 is connected to the both ends of the surface adjacent with second connecting portion 32 of first connecting portion 31.In the present embodiment, the first elastic helix part
33 are provided with two, and the rotation direction of two the first elastic helix parts 33 is identical, and two the first elastic helix parts 33 connect on first
The axis of socket part 31 axisymmetricly, at this time, throwing of two the first elastic helix parts 33 on the same end face of first connecting portion 31
Shadow is separated from each other.The second elastic helix part 34 is connected between second connecting portion 32 and installing plate 35, namely the second elastic spiral shell
Rotating part 34 is connected to the both ends of the surface adjacent with installing plate 35 of second connecting portion 32.In the present embodiment, the second elastic helix part 34 is set
Two are equipped with, the rotation direction of two the second elastic helix parts 34 is identical, and two the second elastic helix parts 34 connect also with regard to first
The axis of socket part 31 axisymmetricly, at this time, throwing of two the second elastic helix parts 34 on the same end face of first connecting portion 31
Shadow is separated from each other.In the embodiment, the rotation direction of the first elastic helix part 33 is oppositely oriented with the second elastic helix part 34, two
First elastic helix part 33 forms the first projection, two second elasticity in second connecting portion 32 close to the end face of first connecting portion 31
Helical member 34 forms the second projection in second connecting portion 32 close to the end face of first connecting portion 31, and the first projection is positioned at the second projection
It is interior, namely the first elastic helix part 33 helix outside diameter be less than the second elastic helix part 34 helix outside diameter.
To ensure that the first elastic helix part 33 and the second elastic helix part 34 have larger moment of torsion, and avoid between each other
Interference is produced, the number of turns of the first elastic helix part 33 is identical with the number of turns of the second elastic helix part 34, and the first elastic helix part
33 number of turns and the number of turns of the second elastic helix part 34 are that 0.45 circle~0.48 is enclosed.
Such as Fig. 7 and as shown in fig.8, in the present embodiment, it is preferable that two the second elastic helix parts 34 are identical structure,
And reverse symmetry is set, its mathematical model is as follows：
X=φ r
L=ψ r
Wherein：
φ:The corresponding central angle of second elastic helix part end on projection；
r：The corresponding radius of second elastic helix part end on projection；
ψ：The corresponding central angle of any one section of conveyor screw end on projection on second elastic helix part；
x：The corresponding arc length of central angle φ；
l：The corresponding arc length of central angle ψ；
θ：The angle that section turns at second elastic helix part x；
w：Amount of deflection at second elastic helix part x；
δ：The dislocation distance of two the second elastic helix parts.
In Fig. 8, Δ l is the variable quantity of the corresponding arc length of central angle ψ.Above-mentioned mathematical model can preferable reaction pressure torsion shaft coupling
Degree of the disturbing situation of change after the expansion of two the second elastic helix parts 34 in device 3, makes the change of two the second elastic helix parts 34
Shape can more be bonded design requirement, and the effect that pressure turns round amplification reaches optimal.
Such as Fig. 4, Fig. 5, Fig. 6 and Fig. 7 and as shown in fig.1, the installing plate 35 is fixedly mounted on valve body 11, so that
Pressure is turned round shaft coupling 3 and is fixedly mounted on reversal valve 1.In the present embodiment, installing plate 35 includes the plate body 351 in square, and
Be opened in the through hole 352 at 351 center of plate body, first connecting portion 31 can in through hole 352 stretching motion.When armature 22 promotes second
Connecting portion 32 towards spool 12 move when, two the first elastic helix parts 33 and two the second elastic helix parts 34 produce opposite torsion
Turn to drive 31 rotary motion of first connecting portion.
As shown in Figure 1, the sleeve 4 is sleeved on the outside of the second elastic helix part 34, one end of sleeve 4 and installing plate 35 are solid
Fixed connection, the other end of sleeve 4 are connected with housing 21.In the present embodiment, sleeve 4 is square structure, which offers
Through hole (non-label), the second elastic helix part 34 are placed in the through hole.Using the structure of the sleeve 4, pressure is enabled to turn round shaft coupling
Device 3 is us shown firmly attached between reversal valve 1 and proportion electro-magnet 2.
The concrete operating principle of the electro-hydraulic proportion reversing valve：When armature 22 promotes second connecting portion 32 to be transported towards spool 12
When dynamic, between two the first elastic helix parts 33, and structure between two the second elastic helix parts 34 is similar to DNA double
Helical structure, is formed approximate straight between double-spiral structure axile displacement distance, circumferential arc length and structure length of run three
Two relations between right-angle side and bevel edge of angle triangle, it is clear that because the length of helical structure is constant, when second connecting portion 32 by
The push-and-pull action of armature 22 makes first connecting portion 31 change with the dislocation of second connecting portion 32, then necessarily makes two first elasticity
The camber line distance of helical member 33, and the camber line distance of two the second elastic helix parts 34 change, i.e., two first elasticity
Relative torsion occurs for helical member 33, and relative torsion occurs for two the second elastic helix parts 34, so as to drive first connecting portion 31
Rotary motion.It is oppositely oriented due to the first elastic helix part 33 and the second elastic helix part 34, but its rotating stress point
On the contrary, event 31 rotating angle of first connecting portion is superimposed by 32 rotating angle of second connecting portion, so that spool turns
The angle crossed is amplified.It is specific as follows：When providing 2 positive current of proportion electro-magnet, armature 22 is moved towards spool 12, due to valve
The hydraulic power that core 12 is subject to is much larger than electromagnet thrust, and spool 12 can not be pushed directly on by proportion electro-magnet 2 at this time, therefore first connects
Socket part 31 can not also move along a straight line, and two the first elastic helix parts 33 and two the second elastic helix parts 34 are subject to electromagnet at this time
Pressure relative torsion occurs, the draw direction of two the second elastic helix parts 34 will rotate clockwise second connecting portion 32
(facing spool direction), the draw direction of two the first elastic helix parts 33 also will make first connecting portion 31 rotate clockwise (face
To spool direction), and last angle is added for both angles, due to first connecting portion 31 with 12 right end of spool to connect firmly, therefore
12 rotating angle of spool will be increased.(from the right side to the left) rotation clockwise of spool 12, subtracts 12 left end sensitivity cavity pressure of spool
It is small, and 12 right end pressure of spool is constant, therefore spool 12 will be moved to left movement as spool 12 is yearned for, two first elastic spiral shells
To (the facing spool direction) counterclockwise of rotating part 33 and two the second elastic helix parts 34 rotates, and (faces spool side counterclockwise
To) rotate, spool 12 or so two cavity pressure rebalancing identical with the angle for rotating clockwise (face spool direction) before, valve
Core 12 is static, is pressed eventually through displacement equations formula and turns round the rotation fortune that the linear motion of armature 22 is first changed into spool 12 by shaft coupling
It is dynamic, increase the rotation angle of spool 12, then achieve the purpose that 12 Displacement Ratio armature 22 of spool is big.Similarly, when the ratio of offer electricity
During 2 negative current of magnet, armature 22 is moved towards away from 12 direction of spool, two the first elastic helix parts 33 and two second elastic spiral shells
34 direction of rotation of rotating part also will be on the contrary, last 12 displacement of spool obtains opposite direction amplification.
The embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make very much
Form, these are belonged within the protection of the present invention.
Claims (6)
- A kind of 1. two-way big flow type electro-hydraulic proportion reversing valve, it is characterised in that：It is connected to including reversal valve (1), two The proportion electro-magnet (2) at reversal valve (1) both ends, and two pressures turn round shaft coupling (3)；The reversal valve (1) includes valve body (11), the spool (12) and in the valve body (11)；Each proportion electro-magnet (2) includes housing (21), with And the armature (22) in the housing (21)；The two of radial symmetric distribution are offered on spool (12) the left end shoulder To left end pressure hole (121), two pairs of left end pressure holes (121) communicate for P mouthfuls with system pressure mouth；Spool (12) right end opens up Have and the symmetrical two pairs of right end pressure holes (123) of two pairs of left end pressure holes (121), two pairs of right end pressure holes (123) and system pressure P mouthfuls of power mouth communicates；Offered inside the valve body (11) and left experience passage (122) and right experience passage (124), the left impression Passage (122) is communicated with spool (12) left end sensitive cavity, described right to experience passage (124) and spool (12) right end sensitive cavity phase It is logical；It is described left to experience passage (122) and two pairs of left end pressure holes when the electro-hydraulic proportion reversing valve is in the initial position of balance (121) the first transfer area is formed, it is described right to experience passage (124) and form the second interfaces with two pairs of right end pressure holes (123) Product, first transfer area are identical with second transfer area；Each proportion electro-magnet (2) is turned round shaft coupling (3) by the pressure respectively and is connected with the spool (12)；It is each described Pressure, which is turned round shaft coupling (3) and fixed including the first connecting portion (31) being fixedly connected with the spool (12) and the armature (22), to be connected The second connecting portion (32) that connects, two the first elastic helix parts (33), two the second elastic helix parts (34), and be fixedly mounted Installing plate (35) on the valve body (11)；The first connecting portion (31), the second connecting portion (32), first bullet Property helical member (33), the second elastic helix part (34), and the installing plate (35) are integrated；Two described One elastic helix part (33) is connected between the first connecting portion (31) and the second connecting portion (32), described in two Second elastic helix part (34) is connected between the second connecting portion (32) and the installing plate (35)；The first connecting portion (31) and the second connecting portion (32) are the cylinder being coaxially disposed；First elastic helix The rotation direction of part (33) is oppositely oriented with the second elastic helix part (34)；The rotation of two the first elastic helix parts (33) To identical, and on the first connecting portion (31) axis axisymmetricly；The rotation of two the second elastic helix parts (34) To identical, and on the first connecting portion (31) axis axisymmetricly；Two the first elastic helix parts (33) are in institute State second connecting portion (32) and form the first projection, two second elastic helix close to the end face of the first connecting portion (31) Part (34) forms the second projection in the second connecting portion (32) close to the end face of the first connecting portion (31), and described first throws Shadow is in the described second projection；When the armature (22) promotes the second connecting portion (32) to be moved towards the spool (12), two first bullets Property helical member (33) with two the second elastic helix parts (34) produce relative torsions to drive the first connecting portion (31) Rotary motion.
- 2. two-way big flow type electro-hydraulic proportion reversing valve according to claim 1, it is characterised in that：Described first elastic spiral shell The number of turns of rotating part (33) is identical with the number of turns of the second elastic helix part (34).
- 3. two-way big flow type electro-hydraulic proportion reversing valve according to claim 2, it is characterised in that：Described first elastic spiral shell The number of turns of rotating part (33) is~0.48 circle of 0.45 circle.
- 4. two-way big flow type electro-hydraulic proportion reversing valve according to claim 1, it is characterised in that：The installing plate (35) Including the plate body (351) in square, and it is opened in the through hole (352) at the plate body (351) center；The first connecting portion (31) can in the through hole (352) stretching motion.
- 5. two-way big flow type electro-hydraulic proportion reversing valve according to claim 1, it is characterised in that：The electric-hydraulic proportion is changed The sleeve (4) for the outside for being sleeved on the second elastic helix part (34) is further included to valve；One end of the sleeve (4) with it is described Installing plate (35) is fixedly connected, and the other end of the sleeve (4) is connected with the housing (21).
- 6. two-way big flow type electro-hydraulic proportion reversing valve according to claim 5, it is characterised in that：The sleeve (4) is Square structure；The square structure offers through hole, and the second elastic helix part (34) is placed in the through hole.
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| CN201610048930.3A CN105465454B (en) | 2016-01-25 | 2016-01-25 | Two-way big flow type electro-hydraulic proportion reversing valve |
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| CN201610048930.3A CN105465454B (en) | 2016-01-25 | 2016-01-25 | Two-way big flow type electro-hydraulic proportion reversing valve |
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| CN105465454B true CN105465454B (en) | 2018-04-13 |
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