CN221221619U

CN221221619U - Proportional solenoid valve

Info

Publication number: CN221221619U
Application number: CN202322874536.3U
Authority: CN
Inventors: 可忠民; 李彦飞; 杨钧亭; 朱纬
Original assignee: Hilite Automobile Technology Co ltd
Current assignee: Hilite Automobile Technology Co ltd
Priority date: 2023-10-25
Filing date: 2023-10-25
Publication date: 2024-06-25
Anticipated expiration: 2033-10-25

Abstract

The utility model discloses a proportional electromagnetic valve which comprises a valve body with a valve cavity, a valve seat arranged at one end of the valve body, a static iron core at least partially accommodated by the valve body cavity and provided with an adjusting cavity and a moving iron core cavity, a moving iron core positioned in the moving iron core cavity, a coil positioned in the valve cavity and surrounding the static iron core, an adjusting piece positioned in the adjusting cavity and provided with a guide rod cavity, a guide rod extending into the guide rod cavity, a guide elastic piece sleeved outside the guide rod and positioned between the moving iron core and the adjusting piece, and a reed arranged at one end of the moving iron core and in abutting contact with the inner wall of the static iron core. The utility model has the advantages that: the method realizes smaller hysteresis and faster response speed, compensates the problem of inconsistent product performance caused by part materials or processing problems, and reduces friction force.

Description

Proportional solenoid valve

Technical Field

The utility model relates to the technical field of valves, in particular to a proportional electromagnetic valve.

Background

With the development of world economy, energy and environmental problems are becoming the focus of attention of various countries, and are becoming the hot spot for technical research in the field of power systems. The fuel cell technology is used as a clean and efficient power device, and is used for producing electric energy through chemical reaction of hydrogen and oxygen, and is used for producing various fields of life, and a byproduct of the fuel cell technology is only water, so that the fuel cell technology is a clean technology. However, the application of the fuel cell technology is not wide at present, and the main reason is that the fuel cell technology has a plurality of technical difficulties which are not completely broken through, and the production and manufacturing cost is high. The control of the hydrogen and air circulation system is one of them, and the fuel cell engine adopts electromagnetic valve to control the on-off of hydrogen and air supply and flow regulation, so that the quality of electromagnetic valve performance is directly related to the performance of the whole fuel cell engine. When the fuel cell works, different hydrogen inlet amounts are controlled according to different working conditions through the proportional electromagnetic valve, the proportional electromagnetic valve is required to respond to the flow requirement of the system at any time and meets the precision requirement, and the existing proportional electromagnetic valve has the following defects:

firstly, the hysteresis of the proportional electromagnetic valve is larger, the difference between the control signals of the going-back and the return-back is larger under the same flow, and higher requirements are put on the control of the system;

Secondly, the pressure resistance of the proportional electromagnetic valve is low, the pressure resistance requirement is ensured by an on-off valve outside the core, and the cost is increased;

In addition, the effective current adjustment interval of the proportional solenoid valve is too small, so that the system is easy to overshoot, and the flow stability is poor;

In addition, the consistency of the current-flow curve between the valves is poor due to the difference of materials and processing of the proportional solenoid valve, and a customer needs to adjust a valve control system with larger difference, so that the proportional solenoid valve is inconvenient to use;

finally, the response speed of the proportional solenoid valve is too slow, so that the whole system cannot respond to the requirement of working condition change.

There is thus a need for an improvement over existing proportional solenoid valves and to provide an improved proportional solenoid valve.

Disclosure of utility model

In order to solve the technical problems, the utility model aims to provide a proportional electromagnetic valve which comprises a valve body with a valve cavity, a valve seat arranged at one end of the valve body, a static iron core at least partially accommodated by the valve body cavity and provided with an adjusting cavity and a moving iron core cavity, a moving iron core positioned in the moving iron core cavity, a coil positioned in the valve cavity and surrounding the static iron core, an adjusting piece positioned in the adjusting cavity and provided with a guide rod cavity, a guide rod extending into the guide rod cavity, a guide elastic piece sleeved outside the guide rod and positioned between the moving iron core and the adjusting piece, and a reed arranged at one end of the moving iron core and in abutting contact with the inner wall of the static iron core.

In order to achieve the purpose of the utility model, the utility model provides the following technical scheme:

the static iron core is of an integrated structure.

The outer side of the static iron core is provided with a circumferential groove adjacent to one end of the movable iron core and forming a thin-wall structure, wherein the centers of the static iron core, the movable iron core, the adjusting piece, the guide rod and the reed are on the same straight line.

The guide sleeve is sleeved on the guide rod and is at least partially accommodated by the adjusting piece, and the guide sleeve is adjacent to one end of the guide spring.

The valve body is provided with a valve body, and the valve body is provided with a valve body, a valve body and a coil, and the valve body is provided with a valve body, a valve body and a valve body.

The valve rod is connected with the movable iron core and penetrates through the center of the reed, and a sealing piece is arranged between the valve rod and the valve seat.

The guide rod is located between the adjustment member and the valve stem.

The valve seat also comprises a sealing ring arranged on the outer side of the valve seat and a sealing ring sleeved on the outer side of the adjusting piece.

The sectional area of the reed is larger than that of the movable iron core and smaller than the maximum sectional area of the static iron core.

The sum of the lengths of the adjusting piece and the guide rod is smaller than the length of the static iron core.

Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts the reed-guide rod structure, realizes smaller hysteresis and faster response speed, compensates the problem of inconsistent product performance caused by part materials or processing problems, reduces friction force, ensures the requirements of large pressure resistance and large adjustment interval, calibrates each valve with specified flow, and eliminates or reduces the difference between valves.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is an exploded view of the present utility model;

FIG. 4 is a partial cross-sectional view of the present utility model;

Fig. 5 is a partial perspective view of the present utility model.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

As shown in fig. 1 to 5, the present utility model provides an embodiment of a proportional solenoid valve including a valve body 100 having a valve body cavity 120, a valve seat 200 provided at one end of the valve body 100, a stationary core 300 at least partially received by the valve body cavity 120 and having an adjustment cavity 320 and a moving core cavity 340, a moving core 400 provided in the moving core cavity 340, a coil 500 provided in the valve body cavity 120 and surrounding the stationary core 300, an adjustment member 600 provided in the adjustment cavity 320 and having a guide rod cavity 620, a guide rod 640 extending into the guide rod cavity 620, a guide elastic member 680 provided to be sleeved outside the guide rod 640 and between the moving core 400 and the adjustment member 600, a valve stem 700 connected to the moving core 400 and passing through the center of the reed 800, a sealing member 900 provided between the valve stem 700 and the valve seat 200, a reed 800 provided at the other end of the valve body 100 and fixing the coil 500 to the stationary core 300, a guide sleeve 660 provided at one end of the moving core 400 and in abutting contact with an inner wall of the stationary core 300, and the guide sleeve 660 provided to be sleeved on the guide rod 640 and received by the adjustment member 600, wherein the guide sleeve 660 is adjacent to the guide elastic member 680.

The valve body 100 is generally cylindrical and open at both ends with a valve body cavity 120 therein.

The valve seat 200 is provided on the outer side of the valve body 100, and has sealing rings on both sides thereof for isolating the inlet and outlet of the valve.

The static iron core 300 is integrated, i.e. the movable iron core 400 and the adjusting piece 600 are accommodated in the static iron core 300, and the circumferential groove 310 adjacent to one end of the movable iron core 400 is arranged on the outer side of the static iron core 300, so that the side wall of the static iron core 300 forms a thin-wall structure, and the thin-wall structure is used for enabling magnetic flux on a magnetic path to mainly pass through the movable iron core 400 when the electromagnetic valve is electrified, so that larger electromagnetic force is generated under the condition of the same structural size. The static iron core 300 passes through the valve cavity 120 and is at least partially exposed outside the two ends, one end of the static iron core 300 is connected with the nut 960 in a matching way, and the other end of the static iron core 300 is correspondingly connected with the valve seat 200. The centers of the stationary core 300, the movable core 400, the adjuster 600, the guide bar 640, and the reed 800 are on the same straight line.

The movable core 400 is substantially cylindrical, is surrounded by the stationary core 300, and electromagnetically induces the coil 500, and has one end connected to the guide rod 640 and the other end connected to the valve stem 700.

The adjustment member 600 is preferably an adjustment screw having one end adjacent the nut 960 and the other end adjacent the moving core cavity 340 and a guide rod cavity 620 therein toward the other end. The guide rod 640 is located between the adjuster 600 and the valve stem 700. Wherein the guide rod 640, plunger 400, reed 800, valve stem 700, seal 900 are press fit together and form a plunger assembly. The sum of the lengths of the adjustment member 600 and the guide bar 640 is smaller than the length of the stationary core 300. The guide elastic member 680 is preferably a compression spring.

The present embodiment further includes sealing rings disposed at both sides of the valve seat 200, and sealing rings sleeved outside the adjusting member 600. The sealing ring is preferably an O-ring or an oval ring.

The cross-sectional area of the reed 800 is larger than the cross-sectional area of the movable core 400 and smaller than the maximum cross-sectional area of the stationary core 300. Reed 800 is used to close one end of moving core cavity 340 and provide a spring force in the axial direction.

The seal 900 is circular in cross-section and has a cross-sectional area greater than the cross-sectional area of the valve stem 700, the seal 900 preferably being a gasket. The nut 960 also has the function of preventing accidental adjustment of the adjuster 600.

During assembly, the movable iron core assembly and the guide elastic element 680 are assembled and then are put into the static iron core 300, then the adjusting element 600 and the guide sleeve 660 are assembled, and finally the valve seat 200 is pressed, so that the whole assembly is completed. In the actual assembly and use process, the movable iron core and the static iron core may have eccentricity, so that the lateral force is increased, the friction force is increased, and the hysteresis of the electromagnetic valve is larger. The proportional solenoid valve of this embodiment relies on the reed to make movable core and quiet iron core concentric as far as possible to reduce the side force, and the uide bushing on guide bar and the quiet iron core constitutes the kinematic pair that coefficient of friction is less in addition, in order to reduce friction force.

In the initial position, the movable iron core component is in the valve closing position under the action of the guide elastic element 680, and the pre-tightening force of the spring ensures that the sealing element 900 is tightly attached to the valve seat 200, so that the sealing between the valve rod 700 and the valve seat 200 is realized.

When the coil 500 is electrified, the electromagnetic force drives the movable iron core 400 to move towards the static iron core 300 side against the spring force, and meanwhile, the movable iron core 400 drives the sealing piece 900 to move away from the valve seat 200, and the static iron core 300 is separated from the valve seat 200, so that the opening of the proportional electromagnetic valve is realized. The distance that the movable iron core 400 moves is different with the difference of the current, and the flow of the proportional solenoid valve is also different, so that the proportional control is realized.

Therefore, in order to solve the problem of large hysteresis, the utility model adopts a material with low coercivity; in order to solve the problems of low withstand voltage and small adjustment interval, a spring with larger precompression is used, and meanwhile, a large coil structure is adopted on a magnetic circuit to ensure the requirements of large withstand voltage and large adjustment interval; in order to solve the performance difference problem between valves, the screw structure is adjusted, so that the inconsistent problem caused by factors such as materials or processing can be eliminated or reduced; in order to solve the problem of low response speed of the electromagnetic valve, the friction force is reduced by adopting measures such as improving the surface finish of parts and adopting high polymer materials with smaller friction coefficient; aiming at the problem of large hysteresis of the current electromagnetic valve, the upper surface of the movable iron core adopts a guide rod-PTFE guide ring structure, and the lower surface of the movable iron core adopts a flat reed structure, so that the movable iron core is kept at the middle position of the static iron core to reduce friction force; aiming at the problem of low pressure resistance, a spring with larger precompression and a coil with larger electromagnetic force are adopted to realize the requirement of high pressure resistance; aiming at the problem of performance difference between valves, an adjusting screw is additionally arranged on a movable iron core, and each valve is calibrated for specified flow, so that the difference between the valves is eliminated or reduced; the friction force is reduced by keeping the movable iron core at the middle position of the static iron core by adopting the structure of the guide rod-PTFE guide ring on the upper surface and the structure of the flat reed on the lower surface, so as to achieve the aim of quick response of the electromagnetic valve.

The utility model has the following beneficial effects: the utility model adopts the reed-guide rod structure, realizes smaller hysteresis and faster response speed, compensates the problem of inconsistent product performance caused by part materials or processing problems, reduces friction force, ensures the requirements of large pressure resistance and large adjustment interval, calibrates each valve with specified flow, and eliminates or reduces the difference between valves.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A proportional solenoid valve characterized by comprising: the valve comprises a valve body (100) with a valve cavity (120), a valve seat (200) arranged at one end of the valve body (100), a static iron core (300) at least partially accommodated by the valve cavity (120) and provided with an adjusting cavity (320) and a movable iron core cavity (340), a movable iron core (400) positioned in the movable iron core cavity (340), a coil (500) positioned in the valve cavity (120) and surrounding the static iron core (300), an adjusting piece (600) positioned in the adjusting cavity (320) and provided with a guide rod cavity (620), a guide rod (640) extending into the guide rod cavity (620), a guide elastic piece (680) sleeved outside the guide rod (640) and positioned between the movable iron core (400) and the adjusting piece (600), and a reed (800) arranged at one end of the movable iron core (400) and in abutting contact with the inner wall of the static iron core (300).

2. A proportional solenoid valve according to claim 1, wherein: the static iron core (300) is of an integrated structure.

3. A proportional solenoid valve according to claim 1, wherein: the outer side of the static iron core (300) is provided with a circumferential groove (310) adjacent to one end of the movable iron core (400) and forming a thin-wall structure, wherein the centers of the static iron core (300), the movable iron core (400), the adjusting piece (600), the guide rod (640) and the reed (800) are on the same straight line.

4. The proportioning solenoid valve of claim 1 further comprising a guide sleeve (660) over the guide rod (640) and at least partially received by the trim member (600), wherein the guide sleeve (660) is adjacent to one end of the guide spring (680).

5. The proportional solenoid valve of claim 4, further comprising a nut (960) disposed at the other end of the valve body (100) and securing the coil (500) to the stationary core (300), wherein the nut (960) is disposed adjacent to one end of the adjustment chamber (320).

6. The proportioning solenoid valve of claim 5 further comprising a valve stem (700) coupled to the plunger (400) and passing through the center of the reed (800), and a seal (900) disposed between the valve stem (700) and the valve seat (200).

7. A proportional solenoid valve according to claim 6, wherein: the guide rod (640) is located between the adjuster (600) and the valve stem (700).

8. A proportional solenoid valve as claimed in claim 1 or 2 or 3 or 4 or 5 or 6 or 7, further comprising a seal ring provided outside the valve seat (200) and a seal ring fitted outside the regulator (600).

9. A proportional solenoid valve according to claim 8, wherein: the cross-sectional area of the reed (800) is larger than the cross-sectional area of the movable iron core (400) and smaller than the maximum cross-sectional area of the stationary iron core (300).

10. A proportional solenoid valve according to claim 8, wherein: the sum of the lengths of the adjusting piece (600) and the guide rod (640) is smaller than the length of the Yu Jing iron core (300).