CN105526204B - Independently lead control type electrohydraulic proportional reversing valve in both ends - Google Patents
Independently lead control type electrohydraulic proportional reversing valve in both ends Download PDFInfo
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- CN105526204B CN105526204B CN201610048144.3A CN201610048144A CN105526204B CN 105526204 B CN105526204 B CN 105526204B CN 201610048144 A CN201610048144 A CN 201610048144A CN 105526204 B CN105526204 B CN 105526204B
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- connecting portion
- elastic helix
- helix part
- valve
- pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F16K11/085—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 with cylindrical plug
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a kind of both ends independently to lead control type electrohydraulic proportional reversing valve, including reversal valve, two rotational rate electromagnets and two pressures turn round shaft coupling；Each rotational rate electromagnet is respectively by pressing torsion shaft coupling to be connected with valve element；Pressure, which turns round shaft coupling, includes first connecting portion, second connecting portion, the first elastic helix part, the second elastic helix part, installing plate and feedback rod；First connecting portion, second connecting portion, the first elastic helix part, the second elastic helix part, installing plate and feedback rod 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 rotor 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 being transmitted without friction, be flexible, small volume and process and assemble simplicity.
Description
Technical field
The present invention relates to electro-hydraulic proportional control system field, and control type electrohydraulic is independently led more specifically to a kind of both ends
Proportional reversing valve.
Background technology
Electro-hydraulic proportional valve is adoption rate control technology, a kind of liquid between switch type hydraulic valve and electrohydraulic servo valve
Press element.Because electro-hydraulic proportional valve can combine with electronic-controlled installation, thus it is easy to transport various inputs, output signal
Calculation is handled, to realize complicated control function.Meanwhile electro-hydraulic proportional valve has antipollution, low cost and fast response time etc. excellent
Point, is obtained a wide range of applications in the industrial production.
Existing electro-hydraulic proportion reversing valve can typically use Direct Action Type and lead the design of two kinds of structures of control type.Direct Action Type
Electro-hydraulic proportion reversing valve directly drives valve element motion by rotational rate electromagnet, and its is simple in construction, and can be in work under zero pressure
Make, but big flow control can not be realized due to being limited by rotational rate electromagnet thrust output.Lead the commutation of control type electric-hydraulic proportion
Valve produces larger hydraulic static pressure-driven main valve plug motion by the pressure change of pilot valve control bound sensitive cavity, it is possible to achieve
Big flow controls, but its is complicated, and 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 prior art, there is provided a kind of high-pressure high-flow,
And control type electrohydraulic proportional reversing valve is independently led at both ends simple in construction.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of both ends and independently lead control type electrohydraulic ratio
Example reversal valve, including reversal valve, two rotational rate electromagnets for being connected to the reversal valve both ends, and two pressures are turned round
Shaft coupling；The reversal valve includes valve body, and the valve element in the valve body；Each rotational rate electromagnet bag
Include housing, and the rotor in the housing；
Offer two pairs of left end pressure holes of radial symmetric distribution on the valve element left end shoulder, two pairs of left end pressure holes with
System pressure mouth P mouths communicate；The valve element right-hand member offer with the symmetrical two pairs of right-hand member pressure holes of two pairs of left end pressure holes, two pairs
Right-hand member pressure hole communicates with system pressure mouth P mouths；The valve inner, which offers, left to be experienced passage and right experiences passage, the left side
Experience passage to communicate with valve element left end sensitive cavity, it is described right to experience passage and communicated with valve element right-hand member sensitive cavity；The electric-hydraulic proportion
It is described left to experience passage and two pairs of left end pressure holes the first transfer areas of formation, institute when reversal valve is in the initial position of balance
State it is right experience passage and two pairs of right-hand member pressure holes form the second transfer areas, the first transfer area is identical with the second transfer area；
Each rotational rate electromagnet is turned round shaft coupling by the pressure respectively and is connected with the valve element；Each pressure
Turning round shaft coupling includes the first connecting portion being fixedly connected with the valve element, the second connecting portion being fixedly connected with the rotor, company
The the first elastic helix part and the second elastic helix part that are connected between the first connecting portion and the second connecting portion, installation
Plate, and multiple feedback rods；The valve element, the first connecting portion, the second connecting portion, and the rotor are coaxially set
Put；The first connecting portion, the second connecting portion, the first elastic helix part, the second elastic helix part, the peace
Loading board and the feedback rod are integrated；
The first connecting portion and the second connecting portion are external diameter identical cylinder；The first elastic helix part with
The rotation direction of the second elastic helix part is identical, and the first elastic helix part and the second elastic helix part are respectively in institute
The projection stated on the same end face of first connecting portion is separated from each other；The installing plate includes the plate being fixedly mounted on the valve body
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；It is each described
Feedback rod is connected between the outer wall of the first connecting portion and the inwall of the through hole；Multiple feedback rods are evenly distributed
On the outer wall of the first connecting portion；
When the rotor is rotated to drive the second connecting portion to rotate, the first elastic helix part and described second
Elastic helix part produces relative torsion to drive the first connecting portion rotary motion.
In independently leading control type electrohydraulic proportional reversing valve at both ends of the present invention, the plate body is in square.
In independently leading control type electrohydraulic proportional reversing valve at both ends of the present invention, the electro-hydraulic proportion reversing valve also includes
It is sleeved on the sleeve that the pressure turns round the outside of shaft coupling one end；One end of the sleeve is fixedly connected with the installing plate, described
The other end of sleeve is connected with the housing.
In independently leading control type electrohydraulic proportional reversing valve at both ends of the present invention, the sleeve is square hollow knot
Structure.
In independently leading control type electrohydraulic proportional reversing valve at both ends of the present invention, the feedback rod is four.
Control type electrohydraulic proportional reversing valve is independently led at the both ends for implementing the present invention, is had the advantages that：The electro-hydraulic ratio
Example reversal valve turns round the structure of shaft coupling using the pressure with feedback rod, and when rotational rate electromagnet obtains electric, the rotary motion of rotor makes
Spool rotating, valve element both ends pressure difference move valve element, the first elastic helix part and the second elastic helix part produce axile displacement away from
From will produce certain reset torque, and feedback rod will also produce certain reset torque, rotate first connecting portion jointly
Initial angle is returned, reaches balance again, is had using the pressure torsion shaft coupling with feedback rod without friction transmission, flexible, dynamic sound
The advantages that Ying Hao, small volume and process and assemble simplicity.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the internal structure signal that control type electrohydraulic proportional reversing valve is independently led at the both ends 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 valve element, rotor respectively
Composition；
Fig. 4 is the structure chart of the pressure torsion shaft coupling in the electro-hydraulic proportion reversing valve shown in Fig. 1；
Fig. 5 is the local structural graph of the pressure torsion shaft coupling in the electro-hydraulic proportion reversing valve shown in Fig. 1；
Fig. 6 is the first elastic helix part and described second of the pressure torsion shaft coupling in the electro-hydraulic proportion reversing valve shown in Fig. 1
Degree of the disturbing sketch of elastic helix part.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now compares accompanying drawing and describe in detail
The embodiment of the present invention.In the description of the invention, it is to be understood that term " first ", " second ", " left end ",
" right-hand member " etc. is only used for describing 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 and Fig. 5, presently preferred embodiments of the present invention provides a kind of both ends and independently leads control formula
Electro-hydraulic proportion reversing valve, it includes reversal valve 1, rotational rate electromagnet 2, pressure and turns round shaft coupling 3 and sleeve 4.
Specifically, as shown in Figure 1, Figure 2 and shown in Fig. 3, the reversal valve 1 includes valve body 11, and in valve body 11
Valve element 12.Two pairs of left end pressure holes 121 of radial symmetric distribution, two pairs of left end pressure holes are offered on the left end shoulder of valve element 12
121 communicate with system pressure mouth P mouths, and A mouths and B mouths are respectively actuator port, and T mouths are oil return hydraulic fluid port.The right-hand member of valve element 12 opens up
Have with two pairs of left end pressure holes, 121 symmetrical two pairs of right-hand member pressure holes 123, two pairs of right-hand member pressure holes 123 are equally and system pressure
Mouth P mouths communicate.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-hand member pressure holes 123 form the second transfer area, and the first transfer area is identical with the second transfer area.
The rotational rate electromagnet 2 is provided with two, and two rotational rate electromagnets 2 are connected to the two of reversal valve 1
End.Each rotational rate electromagnet 2 includes housing 21, and the rotor 22 in housing 21.In the present embodiment, Mei Gexuan
Turn proportion electro-magnet 2 respectively by pressing torsion shaft coupling 3 to be connected with valve element 12.The rotational rate electromagnet 2 is normal in the prior art
The structure seen, will not be repeated here.
If Fig. 3, Fig. 4, Fig. 5 are simultaneously as shown in fig.1, pressure torsion shaft coupling 3 is used for the rotor in rotational rate electromagnet 2
22 rotation is changed into the rotary motion of the valve element 12 in reversal valve 1.Pressure is turned round shaft coupling 3 and connected including first connecting portion 31, second
Portion 32, the first elastic helix part 33, the second elastic helix part 34, installing plate 35 and feedback rod 36.First connecting portion 31, second
Connecting portion 32, the first elastic helix part 33, the second elastic helix part 34, installing plate 35 and feedback rod 36 are integrated,
Its globality structure is preferable, relatively simple during electro-hydraulic proportion reversing valve described in assembly and disassembly.In the embodiment, valve element 12, first
Connecting portion 31, second connecting portion 32, and rotor 22 are coaxially disposed.
Wherein, such as Fig. 4, Fig. 5 and refering to shown in Fig. 1, Fig. 2, the first connecting portion 31 is fixedly connected with valve element 12, and this second
Connecting portion 32 is fixedly connected with rotor 22, and first connecting portion 31 and second connecting portion 32 are external diameter identical cylinder.This first
Elastic helix part 33 and the second elastic helix part 34 are connected between first connecting portion 31 and second connecting portion 32, namely
First elastic helix part 33 is connected to the both ends of the surface adjacent with second connecting portion 32 of first connecting portion 31, the second elastic helix part 34
It is again 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
It is identical with the rotation direction of the second elastic helix part 34, and the first elastic helix part 33 and the second elastic helix part 34 connect first respectively
Projection on the same end face of socket part 31 is separated from each other, and this is projected as fan annular, and two projections are axisymmetricly set.When rotor 22
Rotate with when driving the second connecting portion 32 to rotate, the first elastic helix part 33 and the second elastic helix part 34 generation relative torsion with
Drive the rotary motion of first connecting portion 31.
Refering to shown in Fig. 5, Fig. 6, in the present embodiment, it is preferable that the first elastic helix part 33 and the second elastic helix part 34
For identical structure, and reverse symmetry is set, and its mathematical modeling is as follows：
X=φ r
L=ψ r
Wherein：
φ:Central angle corresponding to first elastic helix part or the second elastic helix part end on projection；
r：Radius corresponding to first elastic helix part or the second elastic helix part end on projection；
ψ：Central angle corresponding to any one section of conveyor screw end on projection on first elastic helix part or the second elastic helix part；
x：Arc length corresponding to central angle φ；
l：Arc length corresponding to central angle ψ；
θ：The angle that section turns at first elastic helix part, the second elastic helix part x；
w：Amount of deflection at first elastic helix part, the second elastic helix part x；
δ：The dislocation distance of first elastic helix part and the second elastic helix part.
In Fig. 6, Δ l is the variable quantity of arc length corresponding to central angle ψ.Above-mentioned mathematical modeling preferably reaction pressure can turn round shaft coupling
Degree of the disturbing situation of change after the first elastic helix part 33 and the expansion of the second elastic helix part 34 in device 3, makes the first elastic spiral shell
Rotating part 33 is more bonded design requirement with the deformation energy of the second elastic helix part 34, and the effect that pressure turns round amplification reaches optimal.
As shown in Fig. 3, Fig. 4 and Fig. 5, the installing plate 35 is fixedly mounted on valve body 11, make it that it is solid that pressure turns round shaft coupling 3
Dingan County is on reversal valve 1.In the present embodiment, installing plate 35 includes the plate body 351 in square, and is opened in plate body 351
The through hole 352 at center, first connecting portion 31 can in through hole 352 stretching motion.The feedback rod 36 substantially direct rod shape structure, its
It is connected between the outer wall of first connecting portion 31 and the inwall of through hole 352.In the present embodiment, feedback rod 36 be provided with it is multiple, it is more
Individual feedback rod 36 is evenly distributed on the outer wall of first connecting portion 31.Preferably, feedback rod 36 is provided with four, four feedbacks
Bar 36 is in crossing distribution.Using the structure of the feedback rod 36, when the first elastic helix part 33 and the second elastic helix part 34 produce
Raw axile displacement apart from when, the first elastic helix part 33 and the second elastic helix part 34 will produce certain reset torque, and this is anti-
Feedback bar 36 also produces certain reset torque, causes first connecting portion 31 to rotate back to initial angle jointly, to cause pressure to turn round shaft coupling
Device 3 reaches poised state again.
As shown in figure 1, the sleeve 4 suit pressure is turned round outside one end of shaft coupling 3, one end and the installing plate 35 of sleeve 4 are fixed
Connection, the other end of sleeve 4 are connected with housing 21.In the present embodiment, sleeve 4 is square hollow structure.Using the sleeve 4
Structure, enable to pressure to turn round shaft coupling 3 and be us shown firmly attached between reversal valve 1 and rotational rate electromagnet 2.
The concrete operating principle of the electro-hydraulic proportion reversing valve：As shown in figure 3, system pressure mouth P, actuator port A and B,
And return pressure mouth T.When both sides 2 all dead electricity of rotary magnet, valve element 12 pressure hole 121 and experiences passage 122 in zero-bit
Transfer area, pressure hole 123 and the transfer area for experiencing passage 124, the two transfer areas are identical, the pressure at the both ends of valve element 12
It is identical, therefore valve element 12 is in balance.When the right-hand member electromagnet 2 of reversal valve 1 must be electric, valve element 12 will turn clockwise (from right-hand member electricity
Magnet 2 faces the direction of valve body 11), now the impression passage 122 of left end is reduced with the transfer area of left end pressure hole 121, valve element
12 left chamber pressure decline, and similarly, now the impression passage 124 of right-hand member and the increase of the transfer area of right-hand member pressure hole 123, valve element 12 are right
Cavity pressure raises.In the case of the cavity pressure imbalance of left and right two, valve element 12 will be moved to left, and as valve element 12 moves to left, shaft coupling is turned round in pressure
In the presence of device 3, valve element 12 rotate counterclockwise (direction that valve body 11 is faced from right-hand member electromagnet 2) will go back to initial balance position again
Put, complete electrical-liquid control.Similarly, the left end electromagnet 2 of reversal valve 1 obtains electric, and valve element 12 will move to right, and completes electric-hydraulic proportion control
System.Compared with other electro-hydraulic proportion reversing valves, frictional force and gap is not present in the pressure torsion transfer process that pressure turns round shaft coupling 3, and
The distance or force amplifying function of dislocation can pass through the first elastic helix part 33 of change and the double helix of the second elastic helix part 34
Structural parameters are adjusted.
In the present embodiment, the structure between the first elastic helix part 33 and the second elastic helix part 34 is similar to DNA double spiral shell
Structure is revolved, approximate right angle is formed between double-spiral structure axile displacement distance, circumferential arc length and structure length of run three
Two relations between right-angle side and hypotenuse of triangle, it is clear that because the length of helical structure is constant, when second connecting portion 32 by turn
The push-and-pull action of son 22 makes first connecting portion 31 be changed with the dislocation of second connecting portion 32, then necessarily makes the first elastic helix part
33 are changed with the camber line distance of the second elastic helix part 34, i.e. the first elastic helix part 33 is sent out with the second elastic helix part 34
Raw relative torsion, so as to drive the rotary motion of first connecting portion 31.And first elastic helix part 33 and the second elastic helix part 34
Radial rotary is big, it is sufficient to the rotary motion of rotor 22 is directly transmitted to the rotary motion for valve element 12, while feedback rod 36 can be with
Moment of torsion is stored, when the current decreases, there is force feedback effect.Therefore the rotary motion of rotor 22 is first changed into the rotation of valve element 12,
It is moved in the case of the left chamber of valve element 12 and right chamber pressure imbalance, then realizes negative side in the presence of pressure turns round shaft coupling 3
To initial angle is turned to, the movement of valve element 12 is completed, up to equilbrium position, the angle of the displacement of valve element 12 and rotary magnet 2 into
Direct ratio.Compared with other electro-hydraulic proportion reversing valves, frictional force and gap is not present in the pressure torsion transfer process that pressure turns round shaft coupling 3, and
And the distance or force amplifying function of dislocation can pass through the first elastic helix part 33 of change and double spiral shells of the second elastic helix part 34
Rotation structural parameters are adjusted.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one 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 a lot
Form, these are belonged within the protection of the present invention.
Claims (2)
1. control type electrohydraulic proportional reversing valve is independently led at a kind of both ends, it is characterised in that：Connected respectively including reversal valve (1), two
Rotational rate electromagnet (2) at the reversal valve (1) both ends, and two pressures turn round shaft coupling (3)；Reversal valve (1) bag
Include valve body (11), and the valve element (12) in the valve body (11)；Each rotational rate electromagnet (2) includes shell
Body (21), and the rotor (22) in the housing (21)；
Two pairs of left end pressure holes (121) of radial symmetric distribution, two pairs of left end height are offered on valve element (12) the left end shoulder
Pressure hole (121) communicates with system pressure mouth P mouths；Valve element (12) right-hand member offers symmetrical with two pairs of left end pressure holes (121)
Two pairs of right-hand member pressure holes (123), two pairs of right-hand member pressure holes (123) communicate with system pressure mouth P mouths；The valve body (11) is internal
Offer it is left experience passage (122) and it is right experience passage (124), it is described that left to experience passage (122) sensitive with valve element (12) left end
Chamber communicates, described right to experience passage (124) and communicated with valve element (12) right-hand member sensitive cavity；The electro-hydraulic proportion reversing valve is in balance
Initial position when, it is described left to experience passage (122) and form the first transfer areas, the right side with two pairs of left end pressure holes (121)
Experience passage (124) and form the second transfer area, first transfer area and described second with two pairs of right-hand member pressure holes (123)
Transfer area is identical；
Each rotational rate electromagnet (2) is turned round shaft coupling (3) by the pressure respectively and is connected with the valve element (12)；Each
It is solid including the first connecting portion (31) being fixedly connected with the valve element (12) and the rotor (22) that the pressure turns round shaft coupling (3)
Surely the second connecting portion (32) that connects, first be connected between the first connecting portion (31) and the second connecting portion (32)
Elastic helix part (33) and the second elastic helix part (34), installing plate (35), and multiple feedback rods (36)；The valve element
(12), the first connecting portion (31), the second connecting portion (32), and the rotor (22) are coaxially disposed；Described
One connecting portion (31), the second connecting portion (32), the first elastic helix part (33), the second elastic helix part
(34), the installing plate (35) and the feedback rod (36) are integrated；
The first connecting portion (31) and the second connecting portion (32) are external diameter identical cylinder；First elastic helix
Part (33) is identical with the rotation direction of the second elastic helix part (34), and the first elastic helix part (33) and second bullet
Projection of the property helical member (34) respectively on the same end face of the first connecting portion (31) is separated from each other；The installing plate (35)
Including the plate body (351) being fixedly mounted on the valve body (11), and it is opened in the through hole at the plate body (351) center
(352)；The first connecting portion (31) can in the through hole (352) stretching motion；Each feedback rod (36) is connected to
Between the outer wall of the first connecting portion (31) and the inwall of the through hole (352)；Multiple feedback rods (36) are equably divided
Cloth is on the outer wall of the first connecting portion (31)；
The feedback rod (36) is four；Four feedback rods (36) are in crossing distribution；
The electro-hydraulic proportion reversing valve also includes the sleeve (4) for being sleeved on the outside that the pressure turns round shaft coupling (3) one end；The set
One end of cylinder (4) is fixedly connected with the installing plate (35), and the other end of the sleeve (4) is connected with the housing (21)；Institute
It is square hollow structure to state sleeve (4)；
When the rotor (22) rotate with drive the second connecting portion (32) rotate when, the first elastic helix part (33) with
The second elastic helix part (34) produces relative torsion to drive the first connecting portion (31) rotary motion.
2. control type electrohydraulic proportional reversing valve is independently led at both ends according to claim 1, it is characterised in that：The plate body
(351) it is in square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048144.3A CN105526204B (en) | 2016-01-25 | 2016-01-25 | Independently lead control type electrohydraulic proportional reversing valve in both ends |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048144.3A CN105526204B (en) | 2016-01-25 | 2016-01-25 | Independently lead control type electrohydraulic proportional reversing valve in both ends |
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| Publication Number | Publication Date |
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| CN105526204A CN105526204A (en) | 2016-04-27 |
| CN105526204B true CN105526204B (en) | 2018-02-16 |
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| CN102913496A (en) * | 2012-10-24 | 2013-02-06 | 浙江工业大学 | Bi-directional full-bridge 2D electro-hydraulic proportional directional valve |
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| JP4427169B2 (en) * | 2000-06-21 | 2010-03-03 | ヤンマー株式会社 | Electronically controlled hydraulic governor |
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| CN102913496A (en) * | 2012-10-24 | 2013-02-06 | 浙江工业大学 | Bi-directional full-bridge 2D electro-hydraulic proportional directional valve |
| CN103256401A (en) * | 2013-04-27 | 2013-08-21 | 浙江工业大学 | Prestretching-pretwisting type full-bridge 2D electro-hydraulic proportional directional valve |
| CN103711945A (en) * | 2013-09-17 | 2014-04-09 | 浙江工业大学 | Single-end pretensioning-pretwisting full-bridge 2D electro-hydraulic proportional directional valve |
| CN205298125U (en) * | 2016-01-25 | 2016-06-08 | 浙江申达机器制造股份有限公司 | Accuse formula electric -hydraulic proportional reversing valve is independently led at both ends |
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