CN108916454B - Large stroke armature sealed energy-saving solenoid valve - Google Patents

Abstract

The present invention provides a kind of big stroke armature closed type energy-saving electromagnetic valve, which uses conical surface armature structure, not only increases and is attracted initial power output, but also increases and be attracted side retentivity；It is added to magnetic conduction ring structure, can not only increase the initial power output of release, but also can reduce release side retentivity, reduces and is attracted number of ampere turns, improve and be attracted sensitivity；Using double coils in series structure, in attracting process, following coil plays the role of offsetting lower part permanent magnet flux, coil above plays the role of increasing top permanent magnet flux, during release, coil above plays the role of offsetting top permanent magnet flux, and coil below, which plays, increases lower part permanent magnet flux.The present invention overcomes conventional solenoid valves to control the disadvantages of existing stroke is short, monostable is kept, power consumption is big, has many advantages, such as that small in size, power output and retentivity are big, bistable state, permanent magnet circuit are kept, energy conservation.

Description

Large stroke armature sealed energy-saving solenoid valve

technical field

The patent of the present invention relates to the application field of solenoid valves, in particular to the design of a large-stroke armature-sealed bistable solenoid valve.

Background technique

With the rapid development of China's economy, solenoid valves, as an actuator of automatic instruments, have seen a sharp rise in usage in recent years, and are widely used in various fields such as machinery, petrochemicals, electric power, and national defense research. At present, most of the valves on the market are controlled by hydraulic valves, which have short strokes, monostable state maintenance, high power consumption, and need to be powered all the time, which does not save energy.

In view of the above problems, a permanent magnet bistable solenoid valve is provided, which increases the stroke and output force, and adopts forward and reverse pulse drive. The pipeline is simple, the cost is low, the volume is small, and the expandability is strong. It has become the current market. Great need.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention proposes a large-stroke armature sealed energy-saving solenoid valve. Specifically, the present invention provides the following technical solutions:

A long-stroke armature sealed energy-saving solenoid valve, the solenoid valve includes an armature (a1), one or more permanent magnets (a2), a sleeve (a3), a casing (a4), an upper yoke (a5), a static Iron core (a6), coil one (a7), coil two (a8), coil bobbin (a9), magnetic ring (a10);

Wherein the permanent magnet (a2) is a fan-shaped structure, the permanent magnet (a2) is located in the middle layer of the bobbin (a9), the bottom surface of the sleeve (a3) is in contact with the upper plane of the static iron core (a6), and the static iron core (a6) and the outside of the sleeve (a3) to install the magnetic ring (a10),

The armature (a1) is a movable part sealed in the sleeve (a3);

Preferably, the armature (a1), the shell (a4), the upper yoke (a5), the static iron core (a6), and the magnetically permeable ring (a10) are made of magnetically permeable materials, and the sleeve (a3) and the coil skeleton (a9 ) is a non-magnetic material.

Preferably, the armature (a1) has a direct-acting structure, its upper end surface adopts a tapered surface structure, which increases the facing area and reduces the magnetic gap, and its lower end surface is a plane.

Preferably, the outer structure of the static iron core (a6) is cylindrical and fixed on the casing (a4).

Preferably, the sleeve (a3) is cylindrical with a constant wall thickness and a closed bottom end.

Preferably, the magnetic conduction ring (a10) adopts a cylindrical structure and is installed between the coil frame (a9), the static iron core (a6) and the casing (a4).

Preferably, the permanent magnet (a2) adopts a fan-shaped structure, the magnetization direction is radial magnetization, and the middle layer of the coil frame (a9) is at the middle upper position of the coil frame (a9). The permanent magnet provides the holding force for the armature (a1).

Preferably, coil one (a7) and coil two (a8) are respectively wound on the upper and lower coil skeletons (a9) of the permanent magnet (a2), and coil one (a7) and coil two (a8) are connected in series .

Preferably, the lower end of the armature (a1) is closed and is in the release position, the lower end surface and side surface of the armature (a1) and the upper end surface of the static iron core (a6) and the upper half of the magnetic conduction ring (a10) exceed the static iron core (a6) ) part of the inner surface forms a working air gap 1;

Coil one (a7) and coil two (a8) are wound on the bobbin (a9), and the conical surface of the armature (a1) and the upper pole surface of the upper yoke (a5) form a working air gap 2;

The inner surface of the permanent magnet (a2) and the outer surface of the armature (a1) form a non-working air gap 3 .

More preferably, in the solenoid valve, the magnetic flux of the permanent magnet magnetic circuit without current applied to coil one (a7) and coil two (a8) has two closed magnetic circuits, magnetic circuit 1: the N pole of the permanent magnet— - Non-working air gap 3 - Lower half of armature (a1) - Working air gap 1 - Static iron core (a6) and magnetic permeable ring (a10) - Bottom of housing (a4) - Housing (a4) The lower half of the permanent magnet - the S pole of the permanent magnet; magnetic circuit 2: the N pole of the permanent magnet - the non-working air gap 3 - the upper half of the armature (a1) - the working air gap 2 - the upper yoke ( a5)——the upper half of the shell (a4)——the S pole of the permanent magnet.

Preferably, the armature (a1) is closed at the lower end, and when it is in the release position, when coil one (a7) and coil two (a8) are energized in the forward direction, the armature (a1) moves from the release position to the pull-in position, and the armature (a1) Complete the suction action. It should be noted here that the "forward energization" and "reverse energization" are only used to distinguish the two different directions of the current, and should not be understood as limiting the current flow direction or the forward and reverse directions of the electrodes.

More preferably, the specific process of the above-mentioned pull-in action can be realized as follows: when coil one (a7) and coil two (a8) are energized, a closed magnetic circuit of electromagnetic flux is formed: the static iron core (a6) and the magnetically conductive ring ( a10)——working air gap 1——armature (a1)——working air gap 2——upper yoke (a5)——housing (a4)——static core (a6) and magnetic ring (a10). The direction of the electromagnetic flux at the working air gap 1 is opposite to the direction of the permanent magnet flux magnetic circuit 1, the suction force at the working air gap 1 is reduced, and the direction of the permanent magnetic flux magnetic circuit 2 at the working air gap 2 is opposite to the direction of the electromagnetic flux Likewise, the suction force at the working air gap 2 increases. Under the action of the suction force, the armature (a1) moves from the release position to the attraction position, and the armature (a1) completes the action of attraction.

Preferably, when the armature (a1) is closed at the upper end and is in the pull-in position, the coil one (a7) and coil two (a8) are energized in reverse, the armature (a1) moves from the pull-in position to the release position, and the armature ( a1) Complete the release action.

More preferably, the specific process of the above release action can be realized as follows: pass reverse current to coil one (a7) and coil two (a8) to form a closed magnetic circuit of electromagnetic flux: armature (a1) - working air gap 1——Static iron core (a6) and magnetic ring (a10)——housing (a4)——upper yoke (a5)——working air gap 2——armature (a1). The direction of the electromagnetic flux at the working air gap 2 is opposite to the direction of the permanent magnet flux magnetic circuit 2, the suction force at the working air gap 2 is reduced, and the direction of the permanent magnetic flux magnetic circuit 1 at the working air gap 1 is opposite to the direction of the electromagnetic flux Likewise, the suction at working air gap 1 increases. Under the action of the suction force, the armature (a1) moves from the suction position to the release position, and the armature (a1) completes the release action.

Compared with the prior art, the technical solution of the present invention has the following advantages: it overcomes the shortcomings of the traditional solenoid valve control such as short stroke, monostable state holding, and large power consumption, and has small volume, large output force and holding force, and double Steady state, permanent magnetic circuit maintenance, energy saving and other advantages.

Description of drawings

Fig. 1 is the basic structure sectional view of the embodiment of the present invention;

Fig. 2 is the schematic diagram of the armature part of the embodiment of the present invention;

Fig. 3 is a schematic diagram of parts of the magnetic permeable ring according to the embodiment of the present invention;

Fig. 4 is a schematic diagram of a coil assembly according to an embodiment of the present invention;

Fig. 5 is a cross-sectional view of the release position of the basic magnetic circuit structure of the embodiment of the present invention;

Fig. 6 is a cross-sectional view of the suction position of the basic magnetic circuit structure of the embodiment of the present invention;

Fig. 7 is a schematic diagram of an orthometric assembly of an actual assembly of an embodiment of the present invention.

In the figure: a1: armature, a2: permanent magnet, a3: sleeve, a4: shell, a5: upper yoke, a6: static iron core, a7: coil one, a8: coil two, a9: coil bobbin, a10: Magnetic ring.

specific embodiment

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the figures in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

In a specific embodiment, the solenoid valve provided by the present invention can be realized through the following structural methods.

The armature-sealed bistable electromagnetic valve mechanism provided by the present invention, which can be applied to many fields such as valve control, is suitable for use in valve control systems such as air conditioners, oil pipelines, heating pipelines, etc., and has a large stroke and a large output force. It adopts positive and negative pulse drive, bistable permanent magnet circuit maintenance, simple pipeline, low cost, and small size. After being applied to an electromagnetic system, the change of force can be carried out quickly by replacing the permanent magnet (within the magnetic saturation range). Adjustment, multiple adjustments of permanent magnet and part size can also be carried out according to the actual situation.

Specifically, referring to Fig. 1, the solenoid valve structurally includes armature a1, permanent magnet a2, sleeve a3, casing a4, upper yoke a5, static iron core a6, coil one a7, coil two a8, coil bobbin a9, guide Magnetic ring a10. When multiple permanent magnets are used, for example, eight permanent magnets, the eight permanent magnets have a fan-shaped structure and are magnetized along the diameter direction. Of course, one or four permanent magnets can also be arranged here, and the number of permanent magnets is not limited here.

The permanent magnet a2 is located in the middle upper position of the coil bobbin a9, the bottom surface of the sleeve a3 is in contact with the plane of the static iron core a6, and a magnetic conduction ring a10 of a certain height is installed outside the diameter of the static iron core a6 and the sleeve a3. A certain height, for example, can completely surround the static iron core a6, and surround a part of the lower part of the sleeve a3, or it can be slightly lower than the half height of the bobbin a9, or slightly lower than the height from the bottom of the shell a4 to the permanent magnet a2 The height of the lower surface, or the height from the bottom of the casing a4 to the lower surface of the permanent magnet a2, etc., the specific setting method can be adjusted according to the setting requirements of the magnetic circuit. Installing the magnetic conduction ring a10 increases the area of the facing pole surface between the armature a1, the magnetic conduction ring a10 and the static iron core a6, increases the initial output force of release, and reduces the holding force of the release side.

The armature a1 is a movable part. More preferably, the armature a1 is a direct-acting structure sealed in the sleeve a3. The upper end surface adopts a conical structure to increase the facing area and reduce the magnetic gap, and the lower end surface is a plane.

In a specific embodiment, the permanent magnet a2 adopts a fan-shaped structure. If the permanent magnet adopts a multi-piece structure, for example, eight pieces are used, the eight permanent magnets are evenly placed on the middle layer of the coil frame a9, and the magnetization direction is radial To magnetize, the permanent magnet provides the holding force for the armature a1. The first coil a7 and the second coil a8 are respectively wound on the upper and lower coil frames a9 of the permanent magnet, and the first coil a7 and the second coil a8 are connected in series.

In a specific embodiment, the armature a1 is a direct-acting structure, which moves straight up and down in the sleeve a3, the upper end section is conical, and the lower end surface is a circular plane. The upper end surface of the armature adopts a tapered structure to increase The initial output force of the pull-in can also increase the holding force of the pull-in side. The permanent magnet a2 can be changed into NdFeB, AlNiCo, ferrite and other materials according to actual requirements, and it provides the retaining force at the end of the armature a1. The coil bobbin a9 is set on the outside of the sleeve a3 and the magnetic conduction ring a10, and installed inside the shell a4. The whole is divided into upper, middle and lower layers. The permanent magnet is installed in the middle layer. Coil 1 a7 and coil 2 a8 are wound on the coil bobbin The upper and lower layers of a9. The static iron core a6 is a cylindrical structure, the sleeve a3 is a cylindrical shape with a fixed wall thickness and a closed bottom end, a magnetic guide ring a10 is installed outside the diameter, and the upper end passes through the middle hole of the upper yoke a5. The side surface and the lower end surface of the casing a4 are of an integral structure, and the upper yoke a5 and the casing a4 are connected by means of screw fastening.

In the initial release state, when coil 1 a7 and coil 2 a8 are not energized, the permanent magnetic field generated by the permanent magnet produces an attractive force on the armature a1, and the lower end surface and side of the armature a1 are in contact with the upper end surface of the static iron core a6 and the magnetically permeable ring a10 The inner surface of the upper half beyond the part of the static iron core a6 forms a working air gap 1, and at this time, the conical surface of the armature a1 and the upper yoke a5 form a working air gap 2. Apply forward current to coil one a7 and coil two a8, at the working air gap 1, the direction of the magnetic flux generated by coil one a7 and coil two a8 is opposite to that of the magnetic circuit 1 generated by the permanent magnet, which weakens the work The purpose of the permanent magnetic flux at air gap 1 is to reduce the electromagnetic attraction force on the release side. At the same time, at the working air gap 2, the direction of the magnetic flux generated by coil one a7 and coil two a8 is the same as that of the magnetic circuit 2 generated by the permanent magnet. The direction of the magnetic flux is the same, which serves the purpose of strengthening the permanent magnetic flux at the two places of the working air gap, and increases the electromagnetic suction force on the suction side. The armature a1 moves from the release side to the suction side under the action of the electromagnetic suction force to complete the suction action.

When the armature a1 is in the pull-in position, reverse current is applied to coil one a7 and coil two a8, and at the working air gap 2, the direction of the magnetic flux produced by coil one a7 and coil two a8 is the same as that of the magnetic circuit 2 produced by the permanent magnet. The direction of the magnetic flux is opposite, so as to weaken the permanent magnetic flux at the working air gap 2 and reduce the electromagnetic attraction force on the pull-in side. At the same time, at the working air gap 1, the magnetic flux generated by coil one a7 and coil two a8 The direction is the same as the magnetic flux direction of the magnetic circuit 1 generated by the permanent magnet, which serves the purpose of strengthening the permanent magnetic flux at the working air gap 1 and increases the electromagnetic suction force on the release side. Move from the closed side to the release side to complete the release action.

The present invention mainly sets out to propose a structural design of a bistable electromagnetic valve containing permanent magnets that can be applied to valve control. This structure has the characteristics of simple pipeline, small volume, low cost, bistable state, permanent magnet circuit maintenance, and energy saving. .

Example 2

In a specific embodiment, the solenoid valve provided by the present invention, the specific working process can be carried out in the following manner:

As shown in Figure 5, the lower end of the armature a1 is closed and is in the release position. The lower end surface and side of the armature a1 form a working air gap 1 with the upper end surface of the static iron core a6 and the inner surface of the upper half of the magnetic ring a10 beyond the portion of the static iron core a6; The first coil a7 and the second coil a8 are wound on the bobbin a9, and the conical surface of the armature a1 forms the working air gap 2 with the upper pole surface of the upper yoke a5. The inner side of the permanent magnet and the outer side of the armature a1 form a non-working air gap 3. At this time, the magnetic flux of the permanent magnet magnetic circuit with no current applied to the coil 1 a7 and coil 2 a8 has two closed magnetic circuits. Magnetic circuit 1: N of the permanent magnet Pole - non-working air gap 3 - lower half of armature a1 - working air gap 1 - static iron core a6 and magnetic permeable ring a10 - bottom of shell a4 - lower half of shell a4 - permanent magnet Magnetic circuit 2: N pole of permanent magnet—non-working air gap 3—upper half of armature a1—working air gap 2—upper yoke a5—upper half of housing a4—permanent The S pole of the magnet. At this time, the working air gap 2 is larger than the working air gap 1, so the permanent magnetic flux of the magnetic circuit 1 is much larger than that of the magnetic circuit 2, and the armature a1 can remain in the release position when the coil is powered off.

As shown in Figure 5, the armature a1 is closed at the lower end and is in the release position. When coil one a7 and coil two a8 are energized, an electromagnetic flux in a counterclockwise direction is generated in the magnetic circuit, and the direction of the electromagnetic flux at the working air gap 1 is the same as that of the permanent magnet flux The direction of the magnetic circuit 1 is opposite, the suction force at the working air gap 1 decreases, the direction of the permanent magnetic flux magnetic circuit 2 at the working air gap 2 is the same as the direction of the electromagnetic flux, and the suction force at the working air gap 2 increases. Under the action of the suction force, the armature a1 moves from the release position to the suction position, and the armature a1 completes the suction action.

As shown in Figure 6, the armature a1 is closed at the upper end and is in the pull-in position. The two closed magnetic circuits of the permanent magnetic flux are the same as the path of the armature a1 at the release position, but since the armature a1 is in the pull-in position, the working gas The gap 2 is smaller than the working air gap 1, so the permanent magnetic flux of the magnetic circuit 1 is smaller than that of the magnetic circuit 2, and the armature a1 can remain in the suction position when the coil is powered off.

The armature a1 is closed at the upper end and is in the pull-in position. The reverse current is passed to the coil one a7 and the second coil a8, and the electromagnetic flux in the magnetic circuit is generated in the clockwise direction. The direction of the electromagnetic flux at the working air gap 2 is the same as that of the permanent magnet flux The direction of the path 2 is opposite, the suction force at the working air gap 2 decreases, the direction of the permanent magnetic flux path 1 at the working air gap 1 is the same as the direction of the electromagnetic flux, and the suction force at the working air gap 1 increases. Under the action of the suction force, the armature a1 moves from the suction position to the release position, and the armature a1 completes the release action.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. a kind of big stroke armature closed type energy-saving electromagnetic valve, which is characterized in that the solenoid valve includes armature (a1), one or Multiple permanent magnets (a2), sleeve (a3), shell (a4), upper yoke (a5), static iron core (a6), coil one (a7), coil two (a8), Coil rack (a9), magnetic guiding loop (a10)；

Wherein the permanent magnet (a2) is sector structure, and the permanent magnet (a2) is located at the middle layer of coil rack (a9), sleeve (a3) the upper plane contact of bottom surface and static iron core (a6), external at static iron core (a6) and sleeve (a3) install magnetic guiding loop (a10)；

The armature (a1) is movable member, is sealed in sleeve (a3)；

The armature (a1), shell (a4), upper yoke (a5), static iron core (a6), magnetic guiding loop (a10) are permeability magnetic material, sleeve It (a3) is non-magnet material with coil rack (a9)；

The armature (a1) is direct dynamic structure, and end face uses cone structure thereon, and lower end surface is plane；

For wall thickness, certain, bottom end closure cylindrical shape, diameter install magnetic guiding loop (a10) outside to sleeve (a3)；

The magnetic guiding loop (a10) uses cylindrical structure, is mounted between coil rack (a9) and static iron core (a6), shell (a4).

2. solenoid valve according to claim 1, which is characterized in that the contour structures of the static iron core (a6) are cylinder, It is fixed on shell (a4).

3. solenoid valve according to claim 1, which is characterized in that the permanent magnet (a2) uses sector structure, the side of magnetizing To for radial magnetizing, the middle layer of the coil rack (a9) is the upper middle position of coil rack (a9).

4. solenoid valve according to claim 3, which is characterized in that the coil in the upper and lower part of the permanent magnet (a2) Wound around coil one (a7) and coil two (a8) are distinguished on skeleton (a9), coil one (a7) and coil two (a8) use series system.

5. solenoid valve according to claim 1, which is characterized in that the armature lower end (a1) closure is in releasing position, The lower end surface and side and the static iron core upper surface (a6) of armature (a1) and the magnetic guiding loop upper half (a10) exceed the part static iron core (a6) Medial surface, formed working gas gap 1；

Coil one (a7), coil two (a8) are wrapped on coil rack (a9), pole on the conical surface and upper yoke (a5) of armature (a1) Face forms working gas gap 2；

Permanent magnet (a2) medial surface and armature (a1) lateral surface form non-working-gap 3.

6. solenoid valve according to claim 1, which is characterized in that armature (a1) is closed in lower end, when being in releasing position, When coil one (a7), the positive energization of coil two (a8), then armature (a1) is moved from releasing position to attracted position, and armature (a1) is complete At adhesive action.

7. solenoid valve according to claim 1, which is characterized in that when armature (a1) is closed in upper end, in attracted position When, it is reversely powered to coil one (a7), coil two (a8), then armature (a1) is moved from attracted position to releasing position, armature (a1) release movement is completed.