CN215804906U - Electromagnetic valve and oil sprayer - Google Patents
Electromagnetic valve and oil sprayer Download PDFInfo
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- CN215804906U CN215804906U CN202122394153.7U CN202122394153U CN215804906U CN 215804906 U CN215804906 U CN 215804906U CN 202122394153 U CN202122394153 U CN 202122394153U CN 215804906 U CN215804906 U CN 215804906U
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- armature
- magnetic pole
- actuating element
- valve
- solenoid valve
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Abstract
The invention discloses an electromagnetic valve and an oil sprayer. The solenoid valve includes a valve body, a magnetic pole, a coil, an armature, and an actuating element. The armature is an elastic component, is in the shape of a planar disc spring, and has the functions of the armature and a return spring. The magnetic pole attracting surface is in the shape of an inwards concave conical surface, the outer edge area of the armature is always contacted with the outer edge area of the magnetic pole attracting surface, and in the initial state when the armature is not attracted, the magnetic gap between the surface of the armature and the magnetic pole attracting surface is gradually increased from outside to inside. When the coil is electrified, electromagnetic force is generated on the magnetic pole, the armature iron overcomes the self rigidity under the action of the electromagnetic force to generate flexural deformation which is gradually increased from outside to inside, and the armature iron is absorbed into the concave conical surface of the attraction surface of the magnetic pole. Has the advantages that: the whole moving part of the electromagnetic valve has lighter mass and smaller moving inertia, and the electromagnetic valve has higher response speed and smaller impact force; the oil sprayer utilizes the electromagnetic valve, improves the opening and closing speed of fuel injection, and has higher control precision and longer service life.
Description
Technical Field
The present invention relates to a solenoid valve.
The invention also relates to an oil injector provided with the electromagnetic valve, in particular to an electric control oil injector for fuel injection of an engine.
Background
The electric control fuel injector for fuel injection of engine is characterized by that it utilizes an electromagnetic valve to control a hydraulic device, and further utilizes the hydraulic device to control fuel injector to implement opening and closing of fuel injection.
The electromagnetic valve comprises a valve body, a magnetic pole, a coil, an armature component, an actuating element and a return spring, wherein the magnetic pole is arranged on the valve body, the coil is arranged in the magnetic pole, the attraction surface of the magnetic pole faces the armature component, the armature component is connected with the actuating element, and the return spring acts on the armature component to push the armature component and the actuating element away from the attraction surface of the magnetic pole. In the initial state when the armature is not attracted, a tiny magnetic gap is formed between the armature component and the attraction surface of the magnetic pole. When the coil is electrified, electromagnetic force is generated on the magnetic pole, the attraction armature component overcomes the reset spring force to generate displacement, and then the actuating element generates displacement to control the hydraulic device to complete the control of the oil injector. After the coil is powered off, the return spring pushes the armature and the actuating element to leave the magnetic pole attraction surface and return to the initial position. The engine running speed is high, and the response speed of the solenoid valve must be sufficiently high in order to accurately control the fuel injection performance.
The armature component of the known electromagnetic valve is a rigid component, the armature component must be provided with an axially slidable guide structure during movement, and a return spring must be separately arranged, so that the whole armature component is heavy in mass and large in movement inertia, the electromagnetic valve is slow in response speed and large in impact force, and when the armature component is applied to an engine fuel injector, fuel injection control accuracy is poor and the service life is short.
Disclosure of Invention
The invention aims to provide an electromagnetic valve and an oil injector with the electromagnetic valve, and aims to solve the problems of heavy mass of a moving part of the electromagnetic valve, large moving inertia, poor fuel injection control precision of the oil injector and short service life.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an electromagnetic valve which comprises a valve body, a magnetic pole, a coil, an armature and an actuating element, wherein the magnetic pole is arranged in the valve body, the coil is arranged in the magnetic pole, and the attraction surface of the magnetic pole faces the armature.
The armature is an elastic component, is in a shape of a plane disc spring, has the functions of the armature and a return spring, and the inner edge of the armature is connected with the actuating element. The magnetic pole attracting surface is in the shape of an inwards concave conical surface, the outer edge of the armature is always in contact with the magnetic pole attracting surface, and in the initial state when the armature is not attracted, the magnetic gap between the surface of the armature and the magnetic pole attracting surface is gradually increased from outside to inside.
When the armature is attracted, the coil generates electromagnetic force on the magnetic pole when being electrified, the armature overcomes the self rigidity under the action of the electromagnetic force to generate gradually increasing deflection deformation from outside to inside, the armature is attracted into the concave conical surface of the attraction surface of the magnetic pole, the axial displacement is not generated at the outer edge of the armature, the axial displacement is maximum at the inner edge, and the inner edge of the armature drives the actuating element to move.
After the coil is powered off, the rigid elastic force of the armature pushes the inner edge of the armature and the actuating element to leave the magnetic pole attracting surface to an initial position.
As a preferable scheme of the electromagnetic valve, a plurality of cutting grooves are formed on the plane of the armature from the inner edge in a scattering shape from inside to outside so as to reduce the internal stress when the armature is deflected and deformed, and the cutting grooves cannot penetrate through the outer edge.
As a preferable aspect of the above electromagnetic valve, the armature may be formed by stacking a plurality of pieces to increase the axial pressure applied to the actuator member.
As a preferable scheme of the electromagnetic valve, a pre-tightening spring is arranged in the hollow part of the magnetic pole, and one end of the pre-tightening spring is in contact with the armature or the actuating element, so that the armature and the actuating element keep the trend of pushing away from the attraction surface of the magnetic pole, and the axial pressure applied to the actuating element is improved.
The invention also provides a fuel injector for injecting fuel oil of an engine, which comprises the electromagnetic valve, a hydraulic device and a shell, wherein the electromagnetic valve and the hydraulic device are arranged in the shell. And an actuating element of the electromagnetic valve is inserted into the hydraulic device and used as a valve switch of the hydraulic device to control the fuel injector to complete the opening and closing of fuel injection.
As a preferable scheme of the oil injector, the hydraulic device is screwed in the shell through threads, so that the distance between the armature of the solenoid valve and the hydraulic device is shortened, and the mass of the whole moving part of the solenoid valve is reduced.
Preferably, the hydraulic device is a ball switch valve, and the corresponding solenoid valve actuating element is a steel ball.
Preferably, the hydraulic device is a pressure balance valve, and the corresponding solenoid valve actuating element is a cylindrical valve core.
The invention has the beneficial effects that:
for the electromagnetic valve, the armature is an elastic component and has the functions of the armature and a return spring, the outer edge of the armature is always contacted with the attraction surface of the magnetic pole, an axial sliding guide structure of the armature is avoided, the whole moving component is lighter in mass, smaller in moving inertia, faster in response speed of the electromagnetic valve and smaller in impact force.
For the oil injector, the electromagnetic valve is utilized, the opening and closing speed of fuel injection is improved, the control precision is higher, and the service life is longer.
Drawings
Fig. 1 is a schematic partial structure diagram of a solenoid valve and an injector according to an embodiment of the present invention.
FIG. 2 is a partial structural diagram of an initial state of a solenoid valve according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a partial structure of a suction state of a solenoid valve according to an embodiment of the present invention.
Fig. 4 is a partial structure schematic diagram of a preferred embodiment of the solenoid valve of the present invention.
Fig. 5 is a schematic view of a preferred embodiment of the armature of the present invention.
FIG. 6 is a schematic diagram of a partial structure of a second solenoid valve and a fuel injector according to an embodiment of the present invention.
Fig. 7 is a partial structural schematic diagram of a solenoid valve and an oil injector in the prior art.
In the figure: 100-electromagnetic valve; 200-oil injector; 1-magnetic pole; 10-a valve body; 11-magnetic pole attracting surface; 2-a coil; 3-an armature; 30-a guide structure; 31-armature outer edge; 32-armature inner edge; 33-cutting the groove; 4-an actuating element; 40-actuating element initial position; 5-a hydraulic device; 51-threads; 6-injector housing; 7-a return spring; 8-pre-tightening the spring; l1 — magnetic gap at outer magnet; l2 — magnetic gap at inner magnet; delta-actuator travel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Description of the prior art
Fig. 7 shows a conventional, general solenoid valve and a fuel injector (local) using the solenoid valve.
The solenoid valve 100 includes a valve body 10, a magnetic pole 1, a coil 2, an armature assembly 3, an actuating element 4, and a return spring 7. The magnetic pole 1 is arranged on the valve body 10, the coil 2 is arranged in the magnetic pole 1, the attraction surface 11 of the magnetic pole 1 faces the armature component 3, the armature component 3 is connected with the actuating element 4, and the reset spring 7 acts on the armature component 3 to push the armature component 3 and the actuating element 4 away from the attraction surface 11 of the magnetic pole 1. In the initial state when the armature component 3 is not attracted, a small magnetic gap is formed between the armature component 3 and the attraction surface 11 of the magnetic pole 1. When the coil 2 is electrified, electromagnetic force is generated on the magnetic pole 1, the attraction armature component 3 overcomes the force of the reset spring 7 to generate displacement, and then the actuating element 4 generates displacement to control the hydraulic device 5 to complete the control of the oil injector 200. After the coil 2 is de-energized, the return spring 7 pushes the armature assembly 3 and the actuating element 4 to return to the initial position away from the attraction surface 11 of the magnetic pole 1.
The armature assembly 3 is a rigid component and the armature assembly 3 is provided with a guide structure 30 to ensure that the armature assembly 3 can only slide along its axial direction.
The fuel injector 200 shown in fig. 7 has a partial structure including the solenoid valve 100, the hydraulic device 5, and the housing 6. The solenoid valve and the hydraulic means 5 are housed in a casing 6. The actuating element 4 of the solenoid valve 100 is inserted into the hydraulic means 5 and acts as a valve opening and closing device for the hydraulic means 5. That is, the injector controls the hydraulic device 5 through the solenoid valve 100, and further controls the injector 200 to open and close the fuel injection through the hydraulic device 5.
Embodiment one of the invention
As shown in fig. 1 to 3, the present invention provides a solenoid valve and an injector.
The solenoid valve 100 comprises a valve body 10, a pole piece 1, a coil 2, an armature 3 and an actuating element 4. The magnetic pole 1 is arranged on the valve body 10, the coil 2 is arranged in the magnetic pole 1, and the attraction surface 11 of the magnetic pole 1 faces the armature 3.
Referring to fig. 2, the solenoid valve 100 has a partial structure in an initial state, in which the armature 3 is an elastic member in the shape of a planar disk spring, and functions as both an armature and a return spring, and the inner edge 32 of the armature 3 is connected to the actuating element 4. The attracting surface 11 of the magnetic pole 1 is in a concave conical surface shape, the outer edge 31 area of the armature 3 is always contacted with the outer edge area of the attracting surface 11 of the magnetic pole 1, and in the initial state when the armature 3 is not attracted, the magnetic gap between the surface of the armature 3 and the attracting surface 11 of the magnetic pole 1 is gradually increased from the outer L1 to the inner L2.
As shown in fig. 3, in the local structure of the solenoid valve 100 in the attraction state, when the coil 2 is energized, the magnetic pole 1 generates electromagnetic force, the attraction armature 3 overcomes the self rigidity to generate flexural deformation gradually increasing from outside to inside, the armature 3 is attracted into the concave conical surface of the attraction surface 11 of the magnetic pole 1, the outer edge 31 of the armature 3 has no axial displacement, the inner edge 32 has the largest axial displacement, and the inner edge 32 of the armature 3 drives the actuating element 4 to move by a stroke delta.
After the coil 2 is de-energized, the armature 3 self-rigidity elastic force pushes the inner edge 32 of the armature 3 and the actuating element 4 away from the attraction face 11 of the magnetic pole 1 to the initial position.
As shown in fig. 1, the fuel injector 200 includes the solenoid valve 100, a hydraulic device 5, and a housing 6. The solenoid valve 100 and the hydraulic device 5 are housed in the housing 6. The actuating element 4 of the solenoid valve 100 is inserted into the hydraulic device 5 and acts as a valve switch for the hydraulic device 5, controlling the fuel injector 200 to open and close the fuel injection.
In this embodiment, the hydraulic device 5 is a ball switch valve, and the corresponding actuating element 4 of the solenoid valve 100 is a steel ball.
In the present embodiment, the hydraulic means 5 is screwed into the housing 6 by means of a thread 51.
Example two
As shown in fig. 6, the present invention provides another solenoid valve 100 and an injector 200, which are different from the first embodiment in that the hydraulic device 5 is a pressure balance valve, and the actuating element 4 of the corresponding solenoid valve 100 is a cylindrical valve core.
Other preferred embodiments
As shown in fig. 4, as a preferable mode of the solenoid valve 100, the armature 3 may be formed by stacking a plurality of pieces to increase the axial pressure applied to the actuator 4.
As shown in fig. 4 and 6, as a preferable mode of the electromagnetic valve 100, a pretension spring 8 is disposed in a hollow portion of the magnetic pole 1, and one end of the pretension spring 8 acts on the armature 1 or the actuating element 4 to increase the axial pressure applied to the actuating element 4.
As shown in fig. 5, as a preferred embodiment of the solenoid valve 100, a plurality of cutting grooves 33 are formed on the plane of the armature 3 in a scattering manner from the inner edge 32 to reduce the internal stress when the armature 3 is deflected. The cutting groove 33 does not penetrate to the outer edge 31.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides an electromagnetic valve (100), includes valve body (10), magnetic pole (1), coil (2), armature (3) and actuating element (4), and on valve body (10) were arranged in to magnetic pole (1), magnetic pole (1) was arranged in to coil (2), and magnetic pole (1) actuation surface (11) is towards armature (3), its characterized in that: the armature (3) is an elastic component and is in a shape of a planar disc spring, and the inner edge (32) of the armature (3) is connected with the actuating element (4); the attracting surface (11) of the magnetic pole (1) is in the shape of an inwards concave conical surface; the outer edge (31) area of the armature (3) is always contacted with the outer edge area of the attraction surface (11) of the magnetic pole (1), and in the initial state when the armature (3) is not attracted, the magnetic gap between the surface of the armature (3) and the attraction surface (11) of the magnetic pole (1) is gradually increased from the outer L1 to the inner L2; when the armature (3) is attracted, electromagnetic force is generated on the magnetic pole (1) when the coil (2) is electrified, the armature (3) overcomes the self rigidity under the action of the electromagnetic force to generate flexural deformation which is gradually increased from outside to inside, the armature (3) is attracted into the concave conical surface of the attraction surface (11) of the magnetic pole (1), and the inner edge (32) of the armature (3) drives the actuating element (4) to move.
2. A solenoid valve (100) according to claim 1, characterized in that: a plurality of cutting grooves (33) are formed in the plane of the armature iron (3) from the inner edge 32 in a scattering mode from inside to outside, and the cutting grooves (33) cannot penetrate through the outer edge (31).
3. A solenoid valve (100) according to claim 1, characterized in that: the armature (3) can be formed by stacking a plurality of pieces.
4. A solenoid valve (100) according to claim 1, characterized in that: a pre-tightening spring (8) is arranged in the hollow position of the magnetic pole (1), one end of the pre-tightening spring (8) is in contact with the armature (3) or the actuating element (4), and the armature (3) and the actuating element (4) keep the trend of pushing away from the attraction surface (11) of the magnetic pole (1).
5. A fuel injector (200), characterized by: comprising a solenoid valve (100) according to any one of claims 1 to 4, and further comprising a hydraulic device (5) and a housing (6), the solenoid valve (100) and the hydraulic device (5) being housed in the housing (6); the actuating element (4) of the solenoid valve (100) is inserted into the hydraulic device (5).
6. A fuel injector (200) as claimed in claim 5, characterized by: the hydraulic device (5) is screwed in the housing (6) through a thread (51).
7. A fuel injector (200) as claimed in claim 5, characterized by: the hydraulic device (5) is a ball switch valve, and the corresponding actuating element (4) of the electromagnetic valve (100) is a steel ball.
8. A fuel injector (200) as claimed in claim 5, characterized by: the hydraulic device (5) is a pressure balance valve, and the corresponding actuating element (4) of the electromagnetic valve (100) is a cylindrical valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122394153.7U CN215804906U (en) | 2021-10-02 | 2021-10-02 | Electromagnetic valve and oil sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122394153.7U CN215804906U (en) | 2021-10-02 | 2021-10-02 | Electromagnetic valve and oil sprayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215804906U true CN215804906U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122394153.7U Active CN215804906U (en) | 2021-10-02 | 2021-10-02 | Electromagnetic valve and oil sprayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215804906U (en) |
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2021
- 2021-10-02 CN CN202122394153.7U patent/CN215804906U/en active Active
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