CN219953511U - Electromagnetic valve for high-pressure hydrogen injector - Google Patents

Abstract

The utility model discloses an electromagnetic valve for a high-pressure hydrogen injector. The device comprises a device body 1, wherein an installation cavity with a downward opening is arranged in the device body, and an iron core 2 is assembled in the installation cavity; the anti-collision core 3 is arranged in the central hole in the iron core 2 and in interference fit with the iron core 2, the upper end of the anti-collision core 3 is lower than the upper end of the iron core 2, and the lower end of the anti-collision core 3 protrudes out of the lower end of the iron core 2; electromagnetic coils 4 provided on both sides of the outside of the body 1; the upper end surface of the intermediate body 5 is closely contacted with the lower end surface of the iron core 2, an armature 9 is assembled in a central hole in the intermediate body 5, and the upper end surface of the armature 9 is contacted with the bottom of the spring 8; and the clamping spring 6 is arranged at the top of the central holes of the iron core 2 and the anti-collision core 3, and the clamping spring 6 is contacted with the top of the spring 8. The device provided by the utility model can meet the design and performance requirements in the research and development process of the high-pressure hydrogen injector, and simultaneously solves the problems of small electromagnetic force, low response speed, small gas flow in the injector, high installation difficulty, easy damage and the like of the conventional electromagnetic valve.

Description

Electromagnetic valve for high-pressure hydrogen injector

Technical Field

The utility model relates to the technical field of electromagnetic valves for hydrogen injectors, in particular to an electromagnetic valve for a high-pressure hydrogen injector.

Background

An in-cylinder direct injection hydrogen internal combustion engine is a novel internal combustion engine capable of meeting the current emission regulation requirements. The hydrogen injector is one of its core components, and its structure affects the response speed of the injector and the injection amount of hydrogen, thereby affecting the combustion performance and emission performance of the engine.

The hydrogen injector is required to have a high response speed because a large response delay may deteriorate the accuracy of the jet timing misalignment and the circulating jet amount, resulting in exceeding the emission of the hydrogen internal combustion engine and deterioration of economy, and in addition, it is considered that the hydrogen injector has a large gas flow rate. The electromagnetic valve is used as one of core parts of the hydrogen injector, the response speed of the hydrogen injector is determined by the control execution capacity of the electromagnetic valve, and the electromagnetic valve is limited by domestic processing technology, and the processability of the electromagnetic valve and the service life of the electromagnetic valve are reasonably considered when the electromagnetic valve is designed.

Therefore, the utility model aims to provide the electromagnetic valve which can be used for the high-pressure hydrogen injector and is convenient to install, so that the response speed of the electromagnetic valve is improved, the response speed and the gas flow rate of the high-pressure hydrogen injector are further improved, and the design and performance requirements in the research and development process of the high-pressure hydrogen injector are met.

Disclosure of Invention

Therefore, the main purpose of the utility model is to provide the electromagnetic valve for the high-pressure hydrogen injector, which is favorable for solving the problems of small electromagnetic force, slow response speed, small gas flow in the injector, large installation difficulty and easy damage of the electromagnetic valve in the prior electromagnetic valve.

The utility model provides a solenoid valve for a high-pressure hydrogen injector, which comprises:

the device comprises a device body 1, a magnetic core and a magnetic core, wherein an installation cavity with a downward opening is arranged in the device body, and an iron core 2 is assembled in the installation cavity;

the anti-collision core 3 is arranged in the central hole in the iron core 2 and in interference fit with the iron core 2, the upper end of the anti-collision core 3 is lower than the upper end of the iron core 2, and the lower end of the anti-collision core 3 protrudes out of the lower end of the iron core 2;

an electromagnetic coil 4 disposed around the outside of the body 1;

the upper end surface of the intermediate body 5 is closely contacted with the lower end surface of the iron core 2, an armature 9 is assembled in a central hole in the intermediate body 5, the upper end surface of the armature 9 is contacted with the bottom of the spring 8, and the armature (9) is driven by the electromagnetic coil 4 to axially move along the intermediate body 5 in the central hole of the intermediate body 5;

and the clamping spring 6 is arranged at the top of the central holes of the iron core 2 and the anti-collision core 3, and the clamping spring 6 is contacted with the top of the spring 8.

The protruding design of the anti-collision core 3 can play a role in protecting the armature 9 and the iron core 2, and the direct collision between the upper end surface of the armature 9 and the lower end surface of the iron core 2 is avoided, so that the damage of the armature 9 is avoided; the design scheme of the intermediate body 5 ensures that the magnetic flux is more concentrated and the electromagnetic force is larger; the utility model not only can effectively solve the problems of small electromagnetic force and low response speed of the electromagnetic valve, small gas flow quantity in the hydrogen injector and large installation difficulty and easy damage of the electromagnetic valve, but also can provide reference for the design of the subsequent electromagnetic valve and provide reference for developing and designing the high-pressure hydrogen injector.

Optionally, a chamfer is arranged on the circumferential inner side wall at the bottom of the anti-collision core 3, and four grooves 3.1 are respectively arranged at the chamfer positions in two mutually perpendicular directions.

From the top, the chamfer is established to crashproof core 3 bottom and the fish tail when can preventing the installation, and crashproof core 3 bottom chamfer department sets up four recesses and can increase gas circulation.

Alternatively, the armature 9 is provided in a disc shape, a through hole 9.1 is provided at the center of the armature 9, and four inclined holes 9.2 inclined to the outside of the circumference are provided on the armature 9 in two perpendicular directions.

By the through hole and four inclined holes at the center arranged on the armature 9, the gas flow area can be enlarged, and the gas flow rate can be increased.

Alternatively, the gas channel 7 is formed by the central hole of the iron core 2 and the anti-collision core 3, the groove 3.1 at the bottom of the anti-collision core 3, the through hole 9.1 and the inclined hole 9.2 on the armature 9, and the gap between the lower end surface of the iron core 2 and the upper end surface of the armature 9.

From the top, the bottom of crashproof core 3 fluting, inside trompil of armature 9 can enlarge the gas flow area, increase gas flow, guarantee gaseous continuous circulation and supply.

Alternatively, the size of the gap between the lower end surface of the core 2 and the upper end surface of the armature 9 is dependent on the state of motion of the armature 9.

From the top, when the electromagnetic coil 4 is electrified, the armature 9 moves upwards under the action of electromagnetic force, and the gap between the lower end surface of the iron core 2 and the upper end surface of the armature 9 gradually becomes smaller; when the electromagnetic coil 4 is not electrified, the gap between the lower end surface of the iron core 2 and the upper end surface of the armature 9 is the largest.

Alternatively, there is a diameter difference between the upper part of the outer side wall of the core 2 and the lower part of the outer side wall thereof, and the upper part of the outer side wall of the core 2 plays a guiding role.

The outer diameter of the upper part of the outer side wall of the iron core 2 is slightly larger than the outer diameter of the lower part of the outer side wall, the outer diameter of the upper part of the outer side wall of the iron core 2 is just matched with the inner diameter of the device body 1, and the outer diameter of the lower part of the outer side wall of the iron core 2 is slightly smaller than the inner diameter of the device body 1, so that the iron core 2 is convenient to install and pull out; the iron core 2 adopts an upper guide design mode, so that the installation is convenient.

Optionally, the intermediate body 5 includes magnetism isolating sleeve 5.1 and gasket 5.2 that set up from top to bottom, and wherein magnetism isolating material is adopted to magnetism isolating sleeve 5.1, and gasket 5.2 adopts soft magnetic material, and the inseparable contact setting between magnetism isolating sleeve 5.1 and gasket 5.2, and the high duty ratio of magnetism isolating sleeve 5.1 and gasket 5.2 of intermediate body 5 lateral wall is 1:2.

by the above, the intermediate body 5 adopts a design form of combining a magnetism isolating sleeve and a gasket, so that magnetic flux is more intensively acted below the armature 9, electromagnetic force is larger, and electromagnetic valve response is faster; the sealing between the magnetism isolating sleeve and the gasket is realized by the precision machining technology of parts; the height ratio of the magnetism isolating material to the soft magnetic material is 1:2, because the iron core 2 is soft magnetic material, in order to protect the iron core 2 and prolong the service life thereof, the upper part of the intermediate 5 adopts isolation material, under the premise of ensuring the electromagnetic performance thereof, the height ratio of the designed magnetism isolating material to the soft magnetic material is 1:2.

in summary, according to the electromagnetic valve for the high-pressure hydrogen injector, provided by the utility model, due to the dual-material design of the intermediate body 5, magnetic flux is more concentrated, and electromagnetic force is larger; whether the armature 9 can respond in time is a precondition of the quick response of the electromagnetic valve, the design scheme of the intermediate 5 is obtained through simulation calculation, and when the ratio of the soft magnetic material to the magnetism isolating material is 2:1, the electromagnetic force is large enough at the moment, so that the performance requirement of the hydrogen injector can be met; the grooves of the anti-collision core 3 are combined with the inclined holes of the armature 9, so that the gas flow is increased; the anti-collision core 3 protects the armature 9 and the iron core 2, and prolongs the service life of parts; the upper part of the iron core 2 is guided, so that the workpiece is convenient to install.

Drawings

The respective technical features of the present utility model and their relationships are further described below with reference to the drawings. The drawings are exemplary, some technical features are not shown in actual proportion, and some technical features that are conventional in the technical field to which the present utility model pertains and that are not essential to understanding and realizing the present utility model may be omitted from some drawings, or technical features that are not essential to understanding and realizing the present utility model are additionally shown, that is, the combination of the various technical features shown in the drawings is not intended to limit the present utility model. In addition, throughout the present utility model, the same reference numerals are used to designate the same. The specific drawings are as follows:

FIG. 1 is a block diagram of a solenoid valve for a high-pressure hydrogen injector according to the present utility model;

fig. 2 is a schematic view of the outer diameter of the upper and lower parts of the outer side wall of the core in the present utility model;

FIG. 3-a is a bottom view of the crash core of the present utility model;

FIG. 3-b is a front view of the crash core of the present utility model;

FIG. 4 is a schematic representation of an intermediate in the present utility model;

fig. 5-a is a top view of an armature in the present utility model;

fig. 5-b is a front view of an armature in the present utility model.

Description of the reference numerals

1-ware body, 2-iron core, 3-anticollision core, 3.1-recess, 4-solenoid, 5-midbody, 5.1-magnetism isolating sleeve, 5.2-gasket, 6-jump ring, 7-gas passage, 8-spring, 9-armature, 9.1-through-hole, 9.2-inclined hole, 10-needle valve subassembly.

Specific embodiments of the present utility model have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The solenoid valves for existing high pressure hydrogen injectors have some disadvantages: firstly, the electromagnetic flux is small, the electromagnetic force acting on the armature is small, and the response speed of the electromagnetic valve is slow; secondly, the gas flow in the hydrogen injector is small due to the movement of the armature; thirdly, the iron core is difficult to install; fourthly, the upper end face of the armature directly collides with the lower end face of the iron core, so that the armature is damaged.

The utility model provides a solenoid valve for a high-pressure hydrogen injector. The utility model can effectively solve the problems of small electromagnetic force, low response speed, small gas flow in the hydrogen injector, large installation difficulty and easy damage of the electromagnetic valve, and provides reference for the design of the subsequent electromagnetic valve and the development and design of the high-pressure hydrogen injector.

The following describes the technical scheme of the present utility model and how the technical scheme of the present utility model solves the above technical problems in detail with specific embodiments. The specific embodiments described below may be combined with one another to form new embodiments. The same or similar ideas or processes described in one embodiment may not be repeated in certain other embodiments. Embodiments of the present utility model will be described below with reference to the accompanying drawings.

Fig. 1 is a structural view of a solenoid valve for a high-pressure hydrogen injector according to the present utility model, and as shown in fig. 1, the present utility model provides a solenoid valve for a high-pressure hydrogen injector, comprising:

the device comprises a device body 1, a magnetic core and a magnetic core, wherein an installation cavity with a downward opening is arranged in the device body, and an iron core 2 is assembled in the installation cavity;

the anti-collision core 3 is arranged in the central hole in the iron core 2 and in interference fit with the iron core 2, the upper end of the anti-collision core 3 is lower than the upper end of the iron core 2, and the lower end of the anti-collision core 3 protrudes out of the lower end of the iron core 2;

an electromagnetic coil 4 disposed around the outside of the body 1;

the upper end surface of the intermediate body 5 is closely contacted with the lower end surface of the iron core 2, an armature 9 is assembled in a central hole in the intermediate body 5, the upper end surface of the armature 9 is contacted with the bottom of the spring 8, and the armature (9) is driven by the electromagnetic coil 4 to axially move along the intermediate body 5 in the central hole of the intermediate body 5;

and the clamping spring 6 is arranged at the top of the central holes of the iron core 2 and the anti-collision core 3, and the clamping spring 6 is contacted with the top of the spring 8.

Specifically, the protruding design of the anti-collision core 3 can play a role in protecting the armature 9 and the iron core 2, and the direct collision between the upper end surface of the armature 9 and the lower end surface of the iron core 2 is avoided, so that the damage of the armature 9 is avoided; the design scheme of the intermediate body 5 ensures that the magnetic flux is more concentrated and the electromagnetic force is larger; the utility model not only can effectively solve the problems of small electromagnetic force and low response speed of the electromagnetic valve, small gas flow quantity in the hydrogen injector and large installation difficulty and easy damage of the electromagnetic valve, but also can provide reference for the design of the subsequent electromagnetic valve and provide reference for developing and designing the high-pressure hydrogen injector.

In an embodiment of the present utility model, as shown in fig. 1, the electromagnetic coils 4 are disposed at both sides of the body 1. The device body 1 is provided with a mounting cavity with a downward opening, and the iron core 2 is arranged in the mounting cavity. An anti-collision core 3 is arranged in the central hole in the iron core 2, the inner diameter of the iron core 2 is smaller than the outer diameter of the anti-collision core 3, and therefore the iron core 2 is in interference fit with the anti-collision core 3. Compared with the lower end face of the iron core 2, the lower end face of the anti-collision core 3 protrudes 0.05mm, and the lower end face of the iron core 2 is closely connected with the upper end face of the intermediate body 5; a spring 8 is arranged in the central hole of the anti-collision core 3, an armature 9 is arranged in the central hole of the intermediate body 5, and the spring 8 is pressed on the upper end of the armature 9; the clamping spring 6 is in the central hole of the iron core 2 and the anti-collision core 3 and is contacted with the spring 8; the gap between the iron core 2 and the armature 9 changes along with the movement state of the armature 9 at any time, when the electromagnetic valve does not work, the elastic force of the spring 8 presses the armature 9, and at the moment, the gap between the armature 9 and the iron core 2 is the largest, and the gas passes through the gap and is stored; when the electromagnetic valve works, the armature 9 moves upwards against the elastic force of the spring 8 until being connected with the anti-collision core 3.

In the embodiment shown in fig. 1, the armature 9 is in contact with a needle valve assembly 10, the needle valve assembly 10 supporting the armature 9. When the electromagnetic coil 4 is electrified, the armature 9 rises under the action of electromagnetic force, the armature 9 is upwards pressed to compress the spring 8, and the needle valve assembly 10 also rises along with the rising of the armature 9 until the armature 9 is in contact with the anti-collision core 3; when the solenoid 4 is de-energized, the armature 9 and the needle valve assembly 10 move downward under the force of their weight and the spring force of the spring 8, the armature 9 and the needle valve assembly 10.

Alternatively, there is a diameter difference between the upper part of the outer side wall of the core 2 and the lower part of the outer side wall thereof, and the upper part of the outer side wall of the core 2 plays a guiding role.

Specifically, the outer diameter of the upper part of the outer side wall of the iron core 2 is slightly larger than the outer diameter of the lower part of the outer side wall, as shown in a circle in fig. 2 in a 3:1 ratio enlarged manner, the outer diameter of the upper part of the outer side wall of the iron core 2 is just matched with the inner diameter of the device body 1, and the outer diameter of the lower part of the outer side wall of the iron core 2 is slightly smaller than the inner diameter of the device body 1, so that the iron core 2 is convenient to install and pull out; the iron core 2 adopts an upper guide design mode, so that the installation is convenient.

Optionally, a chamfer is arranged on the circumferential inner side wall at the bottom of the anti-collision core 3, and four grooves 3.1 are respectively arranged at the chamfer positions in two mutually perpendicular directions.

Specifically, establish the chamfer in crashproof core 3 bottom and can prevent the fish tail during installation, crashproof core 3 bottom chamfer department sets up four recesses and can increase the gas circulation.

In a specific embodiment of the utility model, four grooves 3.1 are respectively located on two mutually perpendicular axes at the bottom of the crashproof core 3, see bottom view of the crashproof core shown in fig. 3-a, the depth of each groove is equal to the depth of the chamfer, the chamfer depth is set to 1mm, see front view of the crashproof core shown in fig. 3-b.

Optionally, including magnetism isolating sleeve 5.1 and gasket 5.2 that set up from top to bottom, wherein magnetism isolating material is adopted to magnetism isolating sleeve 5.1, and gasket 5.2 adopts soft magnetic material, separates between magnetism isolating sleeve 5.1 and the gasket 5.2 in close contact setting, and the high ratio of magnetism isolating sleeve 5.1 of midbody 5 lateral wall and gasket 5.2 is 1:2.

specifically, the intermediate body 5 adopts a design form of combining a magnetism isolating sleeve and a gasket, so that magnetic flux is more intensively acted below the armature 9, electromagnetic force is larger, and response of the electromagnetic valve is faster; the magnetic isolation sleeve 5.1 and the gasket 5.2 are in close contact with each other, and the close contact is realized by the precision machining technology of parts; the height ratio of the magnetism isolating material to the soft magnetic material is 1:2, because the iron core 2 is soft magnetic material, in order to protect the iron core 2 and prolong the service life thereof, the upper part of the intermediate 5 adopts isolation material, under the premise of ensuring the electromagnetic performance thereof, the height ratio of the designed magnetism isolating material to the soft magnetic material is 1:2.

in an embodiment of the present utility model, as shown in fig. 4, the magnetic shield 5.1 is made of a magnetic shielding material, and the spacer 5.2 is made of a soft magnetic material. Because whether the armature can respond in time is a precondition for the quick response of the electromagnetic valve, the design scheme of the intermediate 5 is obtained through simulation calculation, and when the proportion of the magnetism isolating material to the soft magnetic material is 1:2, the electromagnetic force is large enough at this time, so that the performance requirement of the hydrogen injector can be met.

Alternatively, the armature 9 is provided in a disc shape, a through hole 9.1 is provided at the center of the armature 9, and four inclined holes 9.2 inclined to the outside of the circumference are provided on the armature 9 in two perpendicular directions.

Specifically, the through hole and the four inclined holes at the center provided on the armature 9 can enlarge the gas flow area and increase the gas flow rate.

In a specific embodiment of the present utility model, the surface of the armature 9 is disc-shaped, the diameters of the four inclined holes 9.2 are set to be 1mm, the center of the inclined holes 9.2 is located in the diameter of the iron core 2, and the diameter of the through hole 9.1 is set to be 4.6+/-0.05 mm, see the top view of the armature shown in fig. 5-a; the inclined bore 9.2 is arranged inclined towards the outside of the disc, see the front view of the armature shown in fig. 5-b.

Alternatively, the gas channel 7 is formed by the central hole of the iron core 2 and the anti-collision core 3, the groove 3.1 at the bottom of the anti-collision core 3, the through hole 9.1 and the inclined hole 9.2 on the armature 9, and the gap between the lower end surface of the iron core 2 and the upper end surface of the armature 9.

Specifically, the bottom of the anti-collision core 3 is slotted, and the inside of the armature 9 is perforated, so that the gas flow area can be enlarged, the gas flow quantity can be increased, and the continuous flow and supply of gas can be ensured.

In a specific embodiment of the present utility model, four notches 3.1 are provided at the bottom of the anti-collision core 3, a through hole 9.1 and four inclined holes, that is, inclined holes 9.2 are provided in the armature 9, and when the armature 9 moves to the top, the armature 9 contacts with the anti-collision core 3, and at this time, gas can pass through the four notches 3.1, the through hole 9.1 and the four inclined holes 9.2, so as to ensure continuous circulation and supply of the gas.

Alternatively, the size of the gap between the lower end surface of the core 2 and the upper end surface of the armature 9 is dependent on the state of motion of the armature 9.

Specifically, when the electromagnetic coil 4 is electrified, the armature 9 moves upwards under the action of electromagnetic force, and the size of a gap between the lower end surface of the iron core 2 and the upper end surface of the armature 9 is gradually reduced; when the electromagnetic coil 4 is not electrified, the gap between the lower end surface of the iron core 2 and the upper end surface of the armature 9 is the largest.

In a specific embodiment of the present utility model, the electromagnetic valve of the present utility model operates according to the following principle: when the electromagnetic valve is opened, the electromagnetic coil 4 is electrified to generate a magnetic field, the armature 9 moves upwards against the acting force of the spring 8 under the action of the magnetic field, and the spring 8 has rising limitation under the action of the clamp spring 6. The gas channel 7 between the armature 9 and the core 2 is continuously reduced until the gas channel 7 passes through the notch 3.1 of the anti-collision core 3 and enters the through hole 9.1 and the inclined hole 9.2 of the armature 9 and the gap between the upper end face of the armature 9 and the lower end face of the core 2 when the armature 9 contacts the anti-collision core 3. When the electromagnetic coil 4 is powered off, the electromagnetic valve is closed, and the armature 9 is pressed under the action of the self gravity of the armature 9 and the elastic force of the spring 8.

In summary, according to the electromagnetic valve for the high-pressure hydrogen injector, provided by the utility model, due to the dual-material design of the intermediate body 5, magnetic flux is more concentrated, and electromagnetic force is larger; whether the armature 9 can respond in time is a precondition of the quick response of the electromagnetic valve, the design scheme of the intermediate 5 is obtained through simulation calculation, and when the ratio of the soft magnetic material to the magnetism isolating material is 2:1, the electromagnetic force is large enough at the moment, so that the performance requirement of the hydrogen injector can be met; the grooves of the anti-collision core 3 are combined with the inclined holes of the armature 9, so that the gas flow rate is increased, when the movement stroke of the armature 9 is raised to the highest position, the armature 9 is in direct contact with the anti-collision core 3, the gas flow area is reduced, the gas cannot be timely supplied in the injection process of the hydrogen injector, and the defects can be overcome when the grooves are formed in the bottom of the anti-collision core 3; the anti-collision core 3 protects the armature 9 and the iron core 2, and the armature 9 and the iron core 2 are made of soft magnetic materials, so that the hardness condition of the anti-collision core cannot be guaranteed on the premise of guaranteeing the electromagnetic performance of the anti-collision core, and the anti-collision core 3 is designed to ensure that the armature 9 collides with the anti-collision core 3, protect the iron core 2 and prolong the service life of parts; the upper part of the iron core 2 is guided, so that the workpiece is convenient to install.

Unless defined otherwise, all technical and scientific terms used throughout this utility model have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. In case of inconsistency, the meaning described throughout the present utility model or the meaning derived from what is described throughout the present utility model. In addition, the terminology used in the description of the embodiments of the utility model presented herein is for the purpose of describing the embodiments of the utility model only and is not intended to be limiting.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present utility model has been described in detail by way of the above embodiments, the present utility model is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the technical spirit of the present utility model, which fall within the scope of the present utility model.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims (7)

1. A solenoid valve for a high-pressure hydrogen injector, comprising:

the device comprises a device body (1), wherein an installation cavity with a downward opening is arranged in the device body, and an iron core (2) is assembled in the installation cavity;

the anti-collision core (3) is arranged in the central hole in the iron core (2) and in interference fit with the iron core (2), the upper end of the anti-collision core (3) is lower than the upper end of the iron core (2), and the lower end of the anti-collision core (3) protrudes out of the lower end of the iron core (2);

an electromagnetic coil (4) which is arranged around the outside of the device body (1);

the upper end face of the intermediate body (5) is closely contacted with the lower end face of the iron core (2), an armature (9) is assembled in a central hole in the intermediate body (5), the upper end face of the armature (9) is contacted with the bottom of the spring (8), and the armature (9) is driven by the electromagnetic coil (4) to axially move along the intermediate body (5) in the central hole of the intermediate body (5);

and the clamping spring (6) is arranged at the top of the central hole of the iron core (2) and the anti-collision core (3), and the clamping spring (6) is contacted with the top of the spring (8).

2. A solenoid valve for a high-pressure hydrogen injector according to claim 1, characterized in that the circumferential inner side wall of the bottom of the crashproof core (3) is provided with a chamfer and four grooves (3.1) are respectively provided at the chamfer in two mutually perpendicular directions.

3. A solenoid valve for a high-pressure hydrogen injector according to claim 1, characterized in that the armature (9) is provided in the form of a disc, a through hole (9.1) is provided in the center of the armature (9), and four inclined holes (9.2) inclined to the outside of the circumference are provided in two mutually perpendicular directions on the armature (9).

4. A solenoid valve for a high-pressure hydrogen injector according to claim 2 or 3, characterized in that the gas channel (7) is constituted by the core (2) and the central hole of the anti-collision core (3), the recess (3.1) in the bottom of the anti-collision core (3), the through hole (9.1) and the inclined hole (9.2) in the armature (9), and the gap between the lower end face of the core (2) and the upper end face of the armature (9).

5. A solenoid valve for a high-pressure hydrogen injector according to claim 4, characterized in that the size of the gap between the lower end face of said core (2) and the upper end face of said armature (9) is related to the state of motion of said armature (9).

6. A solenoid valve for a high-pressure hydrogen injector according to claim 1, characterized in that there is a difference in diameter between the upper part of the outer side wall of said iron core (2) and the lower part of the outer side wall thereof, said upper part of the outer side wall of said iron core (2) functioning as a guide.

7. The electromagnetic valve for a high-pressure hydrogen injector according to claim 1, further comprising:

intermediate body (5) are including separating magnetic sleeve (5.1) and gasket (5.2) that set up from top to bottom, wherein, separate magnetic sleeve (5.1) and adopt and separate magnetic material, gasket (5.2) adopt soft magnetic material, separate magnetic sleeve (5.1) with closely contact between gasket (5.2) and set up, intermediate body (5) lateral wall separate magnetic sleeve (5.1) with the high duty ratio of gasket (5.2) is 1:2.