CN105465085A - Displacement reduction type 2D electro-hydraulic proportional reversing valve with compression-torsion couplers - Google Patents

Displacement reduction type 2D electro-hydraulic proportional reversing valve with compression-torsion couplers Download PDF

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Publication number
CN105465085A
CN105465085A CN201610049027.9A CN201610049027A CN105465085A CN 105465085 A CN105465085 A CN 105465085A CN 201610049027 A CN201610049027 A CN 201610049027A CN 105465085 A CN105465085 A CN 105465085A
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China
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elastic helix
joint
electro
reversing valve
spool
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CN201610049027.9A
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CN105465085B (en
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左强
周赵凤
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Zhejiang University City College ZUCC
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Zhejiang University City College ZUCC
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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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention discloses a displacement reduction type 2D electro-hydraulic proportional reversing valve with compression-torsion couplers. The displacement reduction type 2D electro-hydraulic proportional reversing valve comprises a reversing valve body, proportional electromagnets and compression-torsion couplers. Each compression-torsion coupler comprises a first connecting portion, a second connecting portion, two first elastic spiral parts, two second elastic spiral parts and installing plates. The first elastic spiral parts and the second elastic spiral parts are opposite in rotating direction, and the first connecting portions, the second connecting portions, the first elastic spiral parts, the second elastic spiral parts and the installing plates form an integral structure. The displacement reduction type 2D electro-hydraulic proportional reversing valve has the advantages that the electro-hydraulic proportional reversing valve adopts the structures of the compression-torsion couplers, the first elastic spiral parts and the second elastic spiral parts produce relative torsion so as to drive the first connecting portions to perform rotating motion when armatures push the second connecting portions to move towards the valve element, and the displacement reduction type 2D electro-hydraulic proportional reversing valve is free of friction transfer, good in flexibility, small in size, simple and convenient to machine and assemble and the like.

Description

Displacement is reduced formula pressure and is turned round coupling type 2D electro-hydraulic proportion reversing valve
Technical field
The present invention relates to electro-hydraulic proportional control system field, more particularly, relate to a kind of displacement and reduce formula pressure and turn round coupling type 2D electro-hydraulic proportion reversing valve.
Background technique
Electro-hydraulic proportional valve is adoption rate control technique, a kind of hydraulic element between switch type hydraulic valve and electrohydraulic control.Because electro-hydraulic proportional valve can combine with electric control device, be thus convenient to carry out calculation process to various input, output signal, to realize complicated controlling functions.Meanwhile, electro-hydraulic proportional valve has antipollution, low cost and the advantages such as fast response time, obtains a wide range of applications in the industrial production.
Existing electro-hydraulic proportion reversing valve generally can adopt direct-acting type and lead the design proposal of control type two kinds of structures.Direct action type electrohydraulic proportional selector valve is moved by proportion electro-magnet Direct driver spool, and its structure is simple, and can work under zero pressure, but controls owing to cannot realize large discharge by the restriction of proportion electro-magnet thrust output.Lead control type electro-hydraulic proportion reversing valve to be changed by the pressure of pilot valve control bound sensitive cavity, produce larger hydraulic static pressure-driven main valve plug motion, large discharge can be realized and control, but its complex structure, and work under governor pressure cannot being led zero.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of high-pressure high-flow, and the simple displacement of structure is reduced formula pressure and turned round coupling type 2D electro-hydraulic proportion reversing valve.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of displacement and reduce formula pressure and turn round coupling type 2D electro-hydraulic proportion reversing valve, comprise selector valve and proportion electro-magnet; Described selector valve comprises valve body, and is arranged on the spool in described valve body; Described proportion electro-magnet comprises housing, and is arranged on the armature in described housing; The pressure that described 2D electro-hydraulic proportion reversing valve also comprises for connecting described selector valve and described proportion electro-magnet turns round coupling; Described pressure is turned round coupling and is comprised the first joint be fixedly connected with described spool, the second joint be fixedly connected with described armature, two the first elastic helix parts, two the second elastic helix parts, and is fixedly mounted on the mounting plate on described valve body; Described first joint, described second joint, described first elastic helix part, described second elastic helix part, and described mounting plate is integrated; Two described first elastic helix parts are connected between described first joint and described second joint, and two described second elastic helix parts are connected between described second joint and described mounting plate;
Described first joint and described second joint are the coaxial cylindrical body arranged; The rotation direction of described first elastic helix part is identical with the rotation direction of described second elastic helix part; The lead angle of described first elastic helix part, described second elastic helix part first to become towards one end of described second joint by described first joint and diminishes greatly again; The rotation direction of two described first elastic helix parts is identical, and about described first joint axis axisymmetricly; The rotation direction of two described second elastic helix parts is identical, and about described first joint axis axisymmetricly; Two described first elastic helix parts form the first projection at described second joint near the end face of described first joint, two described second elastic helix parts form the second projection at described second joint near the end face of described first joint, and described first projection is positioned at described second projection;
When described armature promotes described second joint towards described valve core movement, two described first elastic helix parts and two described second elastic helix parts produce relative torsion to drive described first joint rotary motion.
Reducing formula pressure in displacement of the present invention turns round in coupling type 2D electro-hydraulic proportion reversing valve, and the number of turns of described first elastic helix part is identical with the number of turns of described second elastic helix part.
Reducing formula pressure in displacement of the present invention turns round in coupling type 2D electro-hydraulic proportion reversing valve, and the number of turns of described first elastic helix part is that 0.45 circle ~ 0.48 is enclosed.
Reduce formula pressure in displacement of the present invention to turn round in coupling type 2D electro-hydraulic proportion reversing valve, described mounting plate comprises the plate body in square body, and is opened in the through hole at described plate body center; Described first joint can in described through hole fore and aft motion.
Reducing formula pressure in displacement of the present invention turns round in coupling type 2D electro-hydraulic proportion reversing valve, and described 2D electro-hydraulic proportion reversing valve also comprises the sleeve of the outside being sleeved on described second elastic helix part; One end of described sleeve is fixedly connected with described mounting plate, and the other end of described sleeve is connected with described housing.
Reducing formula pressure in displacement of the present invention turns round in coupling type 2D electro-hydraulic proportion reversing valve, and described sleeve is square structure; Described square structure offers through hole, and described second elastic helix part is placed in described through hole.
Reduce formula pressure in displacement of the present invention to turn round in coupling type 2D electro-hydraulic proportion reversing valve, described spool be provided with low pressure hole, pressure hole and experience passage;
Wherein, the high h of the overlapping bow of passage is experienced with described in described low pressure hole 1, the overlapping bow-shaped area A of passage is experienced with described in described low pressure hole 1be expressed as according to low pressure hole and the relation experienced between passage:
h 1 = h 0 + R d θ m - R d θ v = h 0 + R d x m R tan β - R d x v R tan β ;
A 1 = 0 ( h 1 < 0 ) h 1 2 r d h 1 - h 1 2 + r d 2 arcsin 2 r d h 1 - h 1 2 r d - r d 2 r d h 1 - h 1 2 ( 0 < h 1 &le; r d ) &pi;r d 2 + h 1 2 r d h 1 - h 1 2 - r d 2 arcsin 2 r d h 1 - h 1 2 r d - r d 2 r d h 1 - h 1 2 ( r d < h 1 &le; 2 r d ) &pi;r d 2 ( h 1 &GreaterEqual; 2 r d )
Described pressure hole experiences the high h of the overlapping bow of passage with described 2, described pressure hole experiences the overlapping bow-shaped area A of passage with described 2be expressed as according to pressure hole and the relation experienced between passage:
h 2 = h 0 - R d &theta; m + R d &theta; v = h 0 - R d x m R tan &beta; + R d x v R tan &beta;
A 2 = 0 ( h 2 < 0 ) h 2 2 r d h 2 - h 2 2 + r d 2 arcsin 2 r d h 2 - h 2 2 r d - r d 2 r d h 2 - h 2 2 ( 0 < h 2 &le; r d ) &pi;r d 2 + h 2 2 r d h 2 - h 2 2 - r d 2 arcsin 2 r d h 2 - h 2 2 r d - r d 2 r d h 2 - h 2 2 ( r d < h 2 &le; 2 r d ) &pi;r d 2 ( h 2 &GreaterEqual; 2 r d )
In formula:
R d: the radius in pressure hole or low pressure hole;
R d: the shoulder radius of spool;
The effective radius of the R: the first elastic helix part and the second elastic helix part transmitting force;
θ m: clockwise (in the face of proportion electro-magnet) corner displacement of spool;
θ v: counterclockwise (in the face of proportion electro-magnet) corner displacement of spool;
X m: the displacement of proportion electro-magnet output level;
X v: valve core movement displacement;
H 0: the initial bow in pressure hole or low pressure hole is high;
The lead angle of the β: the first elastic helix part or the second elastic helix part.
Implement displacement of the present invention to reduce formula pressure and turn round coupling type 2D electro-hydraulic proportion reversing valve, there is following beneficial effect: described 2D electro-hydraulic proportion reversing valve adopts pressure to turn round the structure of coupling, when armature promotes the second joint towards valve core movement, two the first elastic helix parts and two the second elastic helix parts produce relative torsion to drive the first joint rotary motion, thus the straight line motion of armature is become the rotary motion of spool, compared with other electro-hydraulic proportional valve, described 2D electro-hydraulic proportion reversing valve has without friction transmission, flexible, the advantage such as the little and processing and assembling of volume is easy, secondly, because the rotation direction of the first elastic helix part is identical with the rotation direction of the second elastic helix part, can plays and reduce spool stroke, increase the effect of spool positioning precision, moreover, because working pressure be zero or decompression time, because now spool axial resistance is almost nil, directly spool can be promoted completely by proportion electro-magnet, play the feature of direct-acting valve, therefore tradition can be overcome lead the shortcoming that control level electro-hydraulic proportion reversing valve needs to provide separately for leading control level pressure, make hydraulic system more simple, finally, by changing the ratio of the first elastic helix part lead angle tangent value and the second elastic helix part lead angle tangent value, design can be facilitated to reduce the multiple of displacement.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is that the internal structure schematic diagram that formula pressure turns round coupling type 2D electro-hydraulic proportion reversing valve is reduced in the displacement that present pre-ferred embodiments provides;
Fig. 2 is the three-dimensional structure diagram that pressure in the 2D electro-hydraulic proportion reversing valve shown in Fig. 1 turns round coupling;
Fig. 3 is another three-dimensional structure diagram that pressure in the 2D electro-hydraulic proportion reversing valve shown in Fig. 1 turns round coupling;
Fig. 4 is the cut-away view that pressure in the 2D electro-hydraulic proportion reversing valve shown in Fig. 1 turns round coupling;
Fig. 5 is the partial sectional view that pressure in the 2D electro-hydraulic proportion reversing valve shown in Fig. 1 turns round coupling;
Fig. 6 is the 2D electro-hydraulic proportion reversing valve mesolow hole shown in Fig. 1 and the location diagram experiencing passage.
Embodiment
In order to there be understanding clearly to technical characteristics of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, preferred embodiment of the present invention provides a kind of displacement to reduce formula pressure and turns round coupling type 2D electro-hydraulic proportion reversing valve, and it comprises selector valve 1, proportion electro-magnet 2, pressure turn round coupling 3, and sleeve 4.
Particularly, as shown in Fig. 1 and Fig. 6, this selector valve 1 comprises valve body 11, and is arranged on the spool 12 in valve body 11.This spool 12 be provided with low pressure hole 13, pressure hole 14 and experience passage 15.Wherein, the high h of bow that low pressure hole 13 is overlapping with experiencing passage 15 1, the bow-shaped area A that low pressure hole 13 is overlapping with experiencing passage 15 1be expressed as according to low pressure hole 13 and the relation experienced between passage 15:
h 1 = h 0 + R d &theta; m - R d &theta; v = h 0 + R d x m R tan &beta; - R d x v R tan &beta; ;
A 1 = 0 ( h 1 < 0 ) h 1 2 r d h 1 - h 1 2 + r d 2 arcsin 2 r d h 1 - h 1 2 r d - r d 2 r d h 1 - h 1 2 ( 0 < h 1 &le; r d ) &pi;r d 2 + h 1 2 r d h 1 - h 1 2 - r d 2 arcsin 2 r d h 1 - h 1 2 r d - r d 2 r d h 1 - h 1 2 ( r d < h 1 &le; 2 r d ) &pi;r d 2 ( h 1 &GreaterEqual; 2 r d )
The high h of bow that pressure hole 14 is overlapping with experiencing passage 15 2, the bow-shaped area A that pressure hole 14 is overlapping with experiencing passage 15 2be expressed as according to pressure hole 14 and the relation experienced between passage 15:
h 2 = h 0 - R d &theta; m + R d &theta; v = h 0 - R d x m R tan &beta; + R d x v R tan &beta;
A 2 = 0 ( h 2 < 0 ) h 2 2 r d h 2 - h 2 2 + r d 2 arcsin 2 r d h 2 - h 2 2 r d - r d 2 r d h 2 - h 2 2 ( 0 < h 2 &le; r d ) &pi;r d 2 + h 2 2 r d h 2 - h 2 2 - r d 2 arcsin 2 r d h 2 - h 2 2 r d - r d 2 r d h 2 - h 2 2 ( r d < h 2 &le; 2 r d ) &pi;r d 2 ( h 2 &GreaterEqual; 2 r d )
In formula:
R d: the radius in pressure hole or low pressure hole;
R d: the shoulder radius of spool;
The effective radius of the R: the first elastic helix part and the second elastic helix part transmitting force;
θ m: clockwise (in the face of proportion electro-magnet) corner displacement of spool;
θ v: counterclockwise (in the face of proportion electro-magnet) corner displacement of spool;
X m: the displacement of proportion electro-magnet output level;
X v: valve core movement displacement;
H 0: the initial bow in pressure hole or low pressure hole is high;
The lead angle of the β: the first elastic helix part or the second elastic helix part.
Above relation more adequately can describe the change procedure that control level flow area led by this selector valve, thus the size variation process of control level flow is led in reflection, and therefore, the Static and dynamic performance of this relation to whole 2D electro-hydraulic proportion reversing valve has restrictive function.
As shown in Figure 1, this proportion electro-magnet 2 comprises housing 21, and is arranged on the armature 22 in housing 21.Proportion electro-magnet 2 is structure common in prior art, does not repeat them here.
Consult shown in Fig. 1 as Fig. 2, Fig. 3, Fig. 4, this pressure turns round coupling 3 for the straight line motion of the armature 22 in proportion electro-magnet 2 being become the rotary motion of the spool 12 in selector valve 1.Pressure is turned round coupling 3 and is comprised the first joint 31, second joint 32, first elastic helix part 33, second elastic helix part 34 and mounting plate 35.First joint 31, second joint 32, first elastic helix part 33, second elastic helix part 34 and mounting plate 35 are integrated, and its integrity structure is better, comparatively easy during 2D electro-hydraulic proportion reversing valve described in assembly and disassembly.In the present embodiment, pressure is turned round the mode that coupling 3 can adopt 3D to print and is processed.
Wherein, consult shown in Fig. 1 as Fig. 2, Fig. 3, Fig. 4 and Fig. 5, this first joint 31 is fixedly connected with spool 12, this second joint 32 is fixedly connected with armature 22, first joint 31 is the coaxial cylindrical body arranged with the second joint 32, and the external diameter of the first joint 31 is less than the external diameter of the second joint 32.
This first elastic helix part 33 is connected between the first joint 31 and the second joint 32, and also namely the first elastic helix part 33 is connected to the first joint 31 both ends of the surface adjacent with the second joint 32.In the present embodiment, first elastic helix part 33 is provided with two, the rotation direction of two the first elastic helix parts 33 is identical, and two the first elastic helix parts 33 about the first joint 31 axis axisymmetricly, now, two projections of the first elastic helix part 33 on the same end face of the first joint 31 are separated from each other, and this is projected as fan annular, and two projections are arranged axisymmetricly.This second elastic helix part 34 is connected between the second joint 32 and mounting plate 35, and also namely the second elastic helix part 34 is connected to the second joint 32 both ends of the surface adjacent with mounting plate 35.In the present embodiment, second elastic helix part 34 is provided with two, the rotation direction of two the second elastic helix parts 34 is identical, and two same axis about the first joint 31 of the second elastic helix part 34 axisymmetricly, now, two projections of the second elastic helix part 34 on the same end face of the first joint 31 are separated from each other, and this is projected as fan annular, and two projections are arranged axisymmetricly.In this embodiment, the rotation direction of the first elastic helix part 33 is identical with the rotation direction of the second elastic helix part 34, and both are variable-pitch auger body.The lead angle of the first elastic helix part 33, second elastic helix part 34 first to become towards one end of the second joint 32 by the first joint 31 and diminishes greatly again, also be, first elastic helix part 33, second elastic helix part 34 is in close first joint 31, second joint 32 end positions, its lead angle is less, first elastic helix part 33, second elastic helix part 34 is in the neutral position near the first joint 31 and the second joint 32, and its lead angle is larger.
In the present embodiment, two the first elastic helix parts 33 form the first projection at the second joint 32 near the end face of the first joint 31, two the second elastic helix parts 34 form the second projection at the second joint 32 near the end face of the first joint 31, first projection is positioned at the second projection, and also namely the helix external diameter of the first elastic helix part 33 is less than the helix external diameter of the second elastic helix part 34.
For ensureing that the first elastic helix part 33 and the second elastic helix part 34 have larger moment of torsion, and avoid producing interference each other, 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 number of turns of the number of turns of the first elastic helix part 33 and the second elastic helix part 34 is 0.45 circle ~ 0.48 encloses.
Consult shown in Fig. 1 and Fig. 3 as Fig. 2, this mounting plate 35 is fixedly mounted on valve body 11, turn round coupling 3 be fixedly mounted on selector valve 1 to make pressure.In the present embodiment, mounting plate 35 comprises the plate body 351 in square body, and be opened in plate body 351 center through hole 352, first joint 31 can in through hole 352 fore and aft motion.When armature 22 promote the second joint 32 move towards spool 12 time, two the first elastic helix parts 33 and two the second elastic helix parts 34 produce relative torsion to drive the first joint 31 rotary motion.
As shown in Figure 1, this sleeve 4 is sleeved on the outside of the second elastic helix part 34, and one end of sleeve 4 is fixedly connected with mounting plate 35, and the other end of sleeve 4 is connected with housing 21.In the present embodiment, sleeve 4 is square structure, and this square structure offers through hole (non-label), and the second elastic helix part 34 is placed in this through hole.Adopt the structure of this sleeve 4, pressure can be made to turn round coupling 3 and be firmly connected between selector valve 1 and proportion electro-magnet 2.
The specific works principle of described 2D electro-hydraulic proportion reversing valve: when armature 22 promote the second joint 32 move towards spool 12 time, between two the first elastic helix parts 33, and the structure between two the second elastic helix parts 34 is all similar to DNA double helix structure, this double-spiral structure axile displacement distance, the relation of approximate right-angled triangle two between right angle side and hypotenuse is formed between circumference arc length and structure length of run three, obviously, because the length of helix structure is constant, change when the second joint 32 makes the first joint 31 and the second joint 32 misplace by the push-and-pull action of armature 22, then must make the camber line distance of two the first elastic helix parts 33, and the camber line distance of two the second elastic helix parts 34 changes, namely there is relative torsion in two the first elastic helix parts 33, and there is relative torsion in two the second elastic helix parts 34, thus drive the first joint 31 rotary motion.Because the first elastic helix part 33 is identical with the rotation direction of the second elastic helix part 34, but its force bearing point rotated is also identical, therefore the angle that the angle that the first joint 31 rotates is rotated by the second joint 32 is cut down, thus the angle that spool 12 is turned over is reduced.Specific as follows: when providing proportion electro-magnet 2 positive current, armature 22 moves towards spool 12, the hydraulic power be subject to due to spool 12 is much larger than electromagnet thrust, now spool 12 directly cannot be promoted by proportion electro-magnet 2, therefore the first joint 31 also cannot straight line motion, now two the first elastic helix parts 33 and two the second elastic helix parts 34 are subject to the pressure generation relative torsion of electromagnet, the draw direction of two the second elastic helix parts 34 will make the second joint 32 turn clockwise (in the face of spool direction), the draw direction of two the first elastic helix parts 33 also will make the first joint 31 turn clockwise (in the face of spool direction), and last angle is both angles additions, because the first joint 31 and spool 12 right-hand member are for connecting firmly, therefore will the angle that rotates of spool 12 be increased.Spool 12 is (from the right side to the left) rotation clockwise, spool 12 left end sensitive cavity pressure is reduced, and spool 12 right-hand member pressure is constant, therefore spool 12 will to left movement, along with spool 12 yearns for motion, to counterclockwise (in the face of spool direction) of two the first elastic helix parts 33 and two the second elastic helix parts 34 rotates, and (in the face of spool direction) rotates identical with the angle of turn clockwise before (in the face of spool direction) counterclockwise, spool about 12 two cavity pressure rebalancing, spool 12 is static, reduce formula pressure eventually through displacement and turn round the rotary motion that the straight line motion of armature 22 first to be become spool 12 by coupling, increase the angle of swing of spool 12, then the object that spool 12 Displacement Ratio armature 22 is large is reached.In like manner, when providing proportion electro-magnet 2 negative current, armature 22 is towards away from the motion of spool 12 direction, and two the first elastic helix parts 33 are with two the second elastic helix part 34 sense of rotation also by identical, and the displacement of last spool 12 obtains reducing in the other direction.
Compared with other electro-hydraulic proportional valve, the pressure that pressure turns round coupling 3 is turned round transfer process and be there is not frictional force and gap, and the distance of dislocation or power minification can be adjusted by the double-spiral structure parameter of change two the first elastic helix parts 33 and two the second elastic helix parts 34.Moreover, when selector valve 1 working pressure be zero or decompression time, because now poppet shaft is almost nil to hydraulic power, directly can promote spool by proportion electro-magnet completely, play the feature of direct-acting valve.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.

Claims (7)

1. displacement is reduced formula pressure and is turned round a coupling type 2D electro-hydraulic proportion reversing valve, comprises selector valve (1) and proportion electro-magnet (2); Described selector valve (1) comprises valve body (11), and is arranged on the spool (12) in described valve body (11); Described proportion electro-magnet (2) comprises housing (21), and is arranged on the armature (22) in described housing (21); It is characterized in that: described 2D electro-hydraulic proportion reversing valve also comprises turns round coupling (3) for connecting described selector valve (1) with the pressure of described proportion electro-magnet (2); Described pressure is turned round coupling (3) and is comprised the first joint (31) be fixedly connected with described spool (12), the second joint (32) be fixedly connected with described armature (22), two the first elastic helix parts (33), two the second elastic helix parts (34), and is fixedly mounted on the mounting plate (35) on described valve body (11); Described first joint (31), described second joint (32), described first elastic helix part (33), described second elastic helix part (34), and described mounting plate (35) is integrated; Two described first elastic helix parts (33) are connected between described first joint (31) and described second joint (32), and two described second elastic helix parts (34) are connected between described second joint (32) and described mounting plate (35);
Described first joint (31) is the coaxial cylindrical body arranged with described second joint (32); The rotation direction of described first elastic helix part (33) is identical with the rotation direction of described second elastic helix part (34); The lead angle of described first elastic helix part (33), described second elastic helix part (34) first to become towards one end of described second joint (32) by described first joint (31) and diminishes greatly again; The rotation direction of two described first elastic helix parts (33) is identical, and about described first joint (31) axis axisymmetricly; The rotation direction of two described second elastic helix parts (34) is identical, and about described first joint (31) axis axisymmetricly; Two described first elastic helix parts (33) form the first projection described second joint (32) near the end face of described first joint (31), two described second elastic helix parts (34) form the second projection described second joint (32) near the end face of described first joint (31), and described first projection is positioned at described second projection;
When described armature (22) promote described second joint (32) move towards described spool (12) time, two described first elastic helix parts (33) and two described second elastic helix parts (34) produce relative torsion to drive the rotary motion of described first joint (31).
2. displacement according to claim 1 is reduced formula pressure and is turned round coupling type 2D electro-hydraulic proportion reversing valve, it is characterized in that: the number of turns of described first elastic helix part (33) is identical with the number of turns of described second elastic helix part (34).
3. displacement according to claim 2 is reduced formula pressure and is turned round coupling type 2D electro-hydraulic proportion reversing valve, it is characterized in that: the number of turns of described first elastic helix part (33) is that 0.45 circle ~ 0.48 is enclosed.
4. displacement according to claim 1 is reduced formula pressure and is turned round coupling type 2D electro-hydraulic proportion reversing valve, it is characterized in that: described mounting plate (35) comprises the plate body (351) in square body, and be opened in the through hole (352) at described plate body (351) center; Described first joint (31) can at fore and aft motion in described through hole (352).
5. displacement according to claim 1 is reduced formula pressure and is turned round coupling type 2D electro-hydraulic proportion reversing valve, it is characterized in that: described 2D electro-hydraulic proportion reversing valve also comprises the sleeve (4) of the outside being sleeved on described second elastic helix part (34); One end of described sleeve (4) is fixedly connected with described mounting plate (35), and the other end of described sleeve (4) is connected with described housing (21).
6. displacement according to claim 5 is reduced formula pressure and is turned round coupling type 2D electro-hydraulic proportion reversing valve, it is characterized in that: described sleeve (4) is square structure; Described square structure offers through hole, and described second elastic helix part (34) is placed in described through hole.
7. displacement according to claim 1 is reduced formula pressure and is turned round coupling type 2D electro-hydraulic proportion reversing valve, it is characterized in that: described spool (12) be provided with low pressure hole (13), pressure hole (14) and experience passage (15); Wherein, described low pressure hole (13) experiences the overlapping high h of bow of passage (15) with described 1, described low pressure hole (13) experiences the overlapping bow-shaped area A of passage (15) with described 1be expressed as according to low pressure hole (13) and the relation experienced between passage (15):
h 1 = h 0 + R d &theta; m - R d &theta; v = h 0 + R d x m R tan &beta; - R d x v R tan &beta; ;
A 1 = 0 ( h 1 < 0 ) h 1 2 r d h 1 - h 1 2 + r d 2 arcsin 2 r d h 1 - h 1 2 r d - r d 2 r d h 1 - h 1 2 ( 0 < h 1 &le; r d ) &pi;r d 2 + h 1 2 r d h 1 - h 1 2 - r d 2 arcsin 2 r d h 1 - h 1 2 r d - r d 2 r d h 1 - h 1 2 ( r d < h 1 &le; 2 r d ) &pi;r d 2 ( h 1 &GreaterEqual; 2 r d )
Described pressure hole (14) experiences the overlapping high h of bow of passage (15) with described 2, described pressure hole (14) experiences the overlapping bow-shaped area A of passage (15) with described 2be expressed as according to pressure hole (14) and the relation experienced between passage (15):
h 2 = h 0 - R d &theta; m + R d &theta; v = h 0 - R d x m R tan &beta; + R d x v R tan &beta;
A 2 = 0 ( h 2 < 0 ) h 2 2 r d h 2 - h 2 2 + r d 2 arcsin 2 r d h 2 - h 2 2 r d - r d 2 r d h 2 - h 2 2 ( 0 < h 2 &le; r d ) &pi;r d 2 + h 2 2 r d h 2 - h 2 2 - r d 2 arcsin 2 r d h 2 - h 2 2 r d - r d 2 r d h 2 - h 2 2 ( r d < h 2 &le; 2 r d ) &pi;r d 2 ( h 2 &GreaterEqual; 2 r d )
R d: the radius in pressure hole or low pressure hole;
R d: the shoulder radius of spool;
The effective radius of the R: the first elastic helix part and the second elastic helix part transmitting force;
θ m: clockwise (in the face of proportion electro-magnet) corner displacement of spool;
θ v: counterclockwise (in the face of proportion electro-magnet) corner displacement of spool;
In formula:
X m: the displacement of proportion electro-magnet output level;
X v: valve core movement displacement;
H 0: the initial bow in pressure hole or low pressure hole is high;
The lead angle of the β: the first elastic helix part or the second elastic helix part.
CN201610049027.9A 2016-01-25 2016-01-25 Displacement reduces formula pressure and turns round coupling type 2D electro-hydraulic proportion reversing valves Expired - Fee Related CN105465085B (en)

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