solenoid valve
By setting a venting structure on the valve stem or fixed iron core of the solenoid valve, the internal and external spaces of the sealed body are connected when no power is applied, which solves the problem of insufficient sealing performance of the solenoid valve and achieves faster response speed and lower energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MIANYANG FULIN PRECISION MACHINING
- Filing Date
- 2025-04-28
- Publication Date
- 2026-06-19
AI Technical Summary
Existing solenoid valves in air suspension damping systems have insufficient sealing performance, resulting in them being subjected to large friction and pressure when energized, leading to slow response or even failure to close.
An electromagnetic valve was designed. By setting a vent structure on the valve stem or fixed iron core, the internal and external spaces of the sealed body are connected when no power is applied, thus relieving the fluid pressure difference. This allows the valve stem to move more easily and achieve effective sealing when power is applied.
This improves the response speed of the solenoid valve, reduces frictional resistance, extends its service life, and lowers energy consumption.
Smart Images
Figure CN120062370B_ABST
Abstract
Description
Technical Field
[0001] Exemplary embodiments of this disclosure generally relate to the field of valve technology, and more particularly to a solenoid valve. Background Technology
[0002] An air suspension damping system is a type of vehicle suspension system. In an air suspension damping system, there are multiple chambers, and solenoid valves exist between these chambers. These solenoid valves are used to control the connection and disconnection between adjacent chambers by opening and closing them. According to the requirements of an air suspension damping system, it is necessary to ensure that the solenoid valves are not forced open by air pressure surges between chambers when they are closed, in order to prevent gas leakage between adjacent chambers. Therefore, the sealing performance of the solenoid valves has very high requirements.
[0003] However, the sealing structure in existing solenoid valves still has shortcomings. For example, when a solenoid valve is energized, it is subjected to significant frictional and pressure resistance, leading to slow closing response or even failure to close, thus affecting its performance and making it unsuitable for air suspension damping systems. Therefore, there is an urgent need for an optimized solenoid valve. Summary of the Invention
[0004] In order to overcome at least the problems and / or other potential problems existing in existing solenoid valves, the exemplary embodiments of this disclosure propose a solenoid valve.
[0005] Embodiments of this disclosure relate to a solenoid valve. The solenoid valve includes a fixed portion, comprising: a valve seat; a fixed core; a valve stem capable of abutting against or disengaging from the valve seat; a sealing body partially disposed axially outside the valve stem, and the fixed core partially disposed axially outside the sealing body; wherein the relative position of the sealing body with respect to one of the fixed portion and the valve stem is fixed, and a clearance structure is provided for the other of the fixed portion and the valve stem; when the solenoid valve is not energized, the valve stem disengages from the valve seat, and a gap exists between a portion of the sealing body and the clearance structure, allowing a fluid medium to enter the gap; and when the solenoid valve is energized, the valve stem moves along its central axis in response to the electromagnetic force of the solenoid valve to abut against the valve seat, and the portion of the sealing body abuts against the body of the valve stem to block the fluid medium from entering the gap.
[0006] According to embodiments of this disclosure, a simple method can effectively connect the space inside the sealing body with the space outside the sealing body when the solenoid valve is not energized, facilitating the release of fluid pressure within the space inside the sealing body. This makes valve stem movement easier, thereby improving the response speed of the solenoid valve.
[0007] In some embodiments, the relative position of the sealing body and the fixed iron core is fixed, and the clearance structure is a valve stem recess extending from at least a portion of the outer periphery of the valve stem toward the central axis of the solenoid valve. Using this embodiment, the valve stem recess can reliably avoid the sealing body when necessary, thereby achieving communication between the space inside the sealing body and the space outside the sealing body.
[0008] In some embodiments, the valve stem recess is a recess extending about the entire outer circumference of the valve stem toward the central axis of the solenoid valve. This embodiment allows for the simple and reliable implementation of the valve stem recess.
[0009] In some embodiments, the valve stem recess is a groove extending about a portion of the outer periphery of the valve stem toward the central axis of the solenoid valve. This embodiment allows the valve stem recess to be implemented in a wider variety of ways, thus expanding its applicability.
[0010] In some embodiments, the groove is formed by removing material from the outer periphery of the valve stem along the radial direction of the valve stem. Using this embodiment, the groove can be machined in a simple manner, thereby reducing costs.
[0011] In some embodiments, the valve stem recess is a keyway extending about a portion of the outer periphery of the valve stem toward the central axis of the solenoid valve. This embodiment allows the valve stem recess to be adapted to different application scenarios to meet specific requirements.
[0012] In some embodiments, the keyway is formed by removing material from a portion of the outer periphery of the valve stem along the tangential direction of the valve stem. Using this embodiment, the groove can be machined in a simple manner, thereby reducing costs.
[0013] In some embodiments, the relative position of the sealing body and the valve stem is fixed, and the clearance structure is a recess in the fixed iron core extending from at least a portion of the inner circumference of the fixed iron core away from the central axis of the solenoid valve. Using this embodiment, the sealing body can reliably avoid the fixed iron core when necessary, thereby achieving communication between the space inside the sealing body and the space outside the sealing body.
[0014] In some embodiments, the stationary core recess is a groove extending around a portion of the inner circumference of the stationary core away from the central axis of the solenoid valve. This embodiment allows the stationary core recess to be implemented in a wider variety of ways, thus expanding its applicability.
[0015] In some embodiments, the groove is formed by removing material from that portion of the stationary core along the radial direction of the stationary core. Using this embodiment, the groove can be fabricated in a simple manner, thereby reducing costs.
[0016] In some embodiments, the stationary core recess is a recess extending around the entire inner circumference of the stationary core away from the central axis of the solenoid valve. This embodiment allows for the simple and reliable implementation of the stationary core recess.
[0017] In some embodiments, the valve stem includes an axial through-hole extending along the central axis of the solenoid valve.
[0018] These and other aspects of this disclosure will become more apparent in the description of the following embodiments(s). Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A cross-sectional view of an electromagnetic valve in the open state according to an exemplary embodiment of the present disclosure is shown.
[0021] Figure 2 A cross-sectional view of a solenoid valve in a closed state according to an exemplary embodiment of the present disclosure is shown.
[0022] Figure 3 It shows Figure 1 A magnified view of part C in the image.
[0023] Figure 4 It shows Figure 2 A magnified view of part C in the image.
[0024] Figure 5 It shows Figure 3 and Figure 4 A perspective view of a schematic embodiment of the valve stem.
[0025] Figure 6 A partial enlarged view of a solenoid valve according to another embodiment of the present disclosure is shown.
[0026] Figure 7 It shows Figure 6 A three-dimensional view of the valve stem.
[0027] Figure 8 A partial enlarged view of a solenoid valve according to yet another embodiment of the present disclosure is shown.
[0028] Figure 9 It shows Figure 8 A three-dimensional view of the valve stem.
[0029] Figure 10 A cross-sectional view of another solenoid valve in the open state according to an exemplary embodiment of the present disclosure is shown.
[0030] Figure 11 A cross-sectional view of another solenoid valve in a closed state according to an exemplary embodiment of the present disclosure is shown.
[0031] Figure 12 A partially enlarged view of a solenoid valve according to yet another embodiment of the present disclosure is shown.
[0032] Figure 13 It shows Figure 12 A three-dimensional view of the fixed iron core.
[0033] Figure 14 A partially enlarged view of a solenoid valve according to another embodiment of the present disclosure is shown.
[0034] In the accompanying drawings, the same reference numerals denote the same or corresponding parts.
[0035] List of reference numerals
[0036] 1. Solenoid valve
[0037] 10. Sealing body
[0038] 11. Sealing lip edge
[0039] 20 Valve seat
[0040] 21 Axial hole
[0041] 22 Side Holes
[0042] 30 Solenoid
[0043] 40 Armature
[0044] 42 Armature Axle
[0045] 50 springs
[0046] 60 fixed iron core
[0047] 64 inner week
[0048] 66 Grooves
[0049] 67 recess
[0050] 70 Valve stem
[0051] 72 Axial through hole
[0052] 74 Periphery
[0053] 75. Depression
[0054] 76. Trench
[0055] 77 keyway
[0056] 770 Inner side
[0057] A chamber
[0058] Chamber B
[0059] L central axis
[0060] G gap Detailed Implementation
[0061] The principles of this disclosure will now be described with reference to some exemplary embodiments. It should be understood that these embodiments are described for illustrative purposes only and to assist those skilled in the art in understanding and implementing this disclosure, and do not imply any limitation on the scope of this disclosure. The disclosure described herein can be implemented in various ways besides the methods described below.
[0062] In the following description and claims, unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.
[0063] The terms "an embodiment," "embodiment," "example embodiment," etc., used in this disclosure indicate that the described embodiment may include specific features, structures, or characteristics, but not every embodiment must include specific features, structures, or characteristics. Furthermore, these phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, those skilled in the art will believe that applying such features, structures, or characteristics in conjunction with other embodiments (whether explicitly described or not) is within the scope of their knowledge.
[0064] It should be understood that although the terms "first" and "second," etc., can be used to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the exemplary embodiments. The term "and / or" as used herein includes any and all combinations of one or more of the listed terms.
[0065] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0066] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. As used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “having,” “having,” “including,” and / or “comprising” as used herein indicate the presence of the said features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.
[0067] As mentioned above, an increasing number of vehicles are being equipped with air suspension damping systems. These systems incorporate solenoid valves installed between adjacent chambers to control the connection and disconnection of air passages between them. Existing solenoid valves have some shortcomings. For example, when energized, they experience significant frictional and pressure resistance, leading to slow or even non-closing responses and impacting their performance.
[0068] To address at least the aforementioned problems, embodiments of this disclosure provide a solenoid valve 1 for an air suspension damping system in a vehicle. Reference is made below. Figures 1 to 14 The specific structure of the solenoid valve 1 according to an embodiment of the present disclosure will be described.
[0069] Figure 1 and Figure 2 Cross-sectional views of a solenoid valve 1 in an open and closed state, respectively, are shown according to exemplary embodiments of the present disclosure. The solenoid valve 1 of the embodiments of the present disclosure is a normally open valve. Therefore, in Figure 1 In the illustrated embodiment, solenoid valve 1 is in a de-energized state. Figure 2 In this embodiment, the solenoid valve 1 is energized. As shown, the solenoid valve 1 connects two chambers A and B, which are filled with a gaseous medium. The solenoid valve 1 has a stationary part that remains stationary during operation, which includes a valve seat 20 and a fixed iron core 60. The valve seat 20 has an axial hole 21 connected to chamber A and a lateral hole 22 connected to chamber B.
[0070] The following is combined Figure 1 and Figure 2Briefly describe the working process of solenoid valve 1. When the solenoid 30 of solenoid valve 1 is not energized, solenoid valve 1 is in a state of... Figure 1 In the normally open state shown, the valve stem 70 of solenoid valve 1 is disengaged from the valve seat 20. When the solenoid 30 of solenoid valve 1 is energized, a magnetic field is generated. The armature 40 moves under the action of the magnetic field, overcoming the elastic force of the spring 50 and moving towards the fixed iron core 60 as a moving part. The armature 40 and the armature shaft 42 are interference-fitted, causing the armature shaft 42 and the armature 40 to move together towards the fixed iron core 60. The armature shaft 42 and the valve stem 70 are also interference-fitted, so that the valve stem 70, the armature shaft 42, and the armature 40 move synchronously towards the valve seat 20. As the valve stem 70 finally abuts against the valve seat 20, as... Figure 2 As shown, the leakage path between chamber A and chamber B will be closed. Finally, valve stem 70 contacts valve seat 20 to form a seal, and solenoid valve 1 is in the closed state. When solenoid valve 1 is closed, the air pressure in chamber A connected to shaft hole 21 will act on the lower end face of valve stem 70, and the air pressure is in the opening direction of solenoid valve 1. If this air pressure exceeds the electromagnetic force, the air pressure will force open the valve stem's seal, causing solenoid valve 1 to leak and fail. Figure 1 As shown, the valve stem 70 has an axial through-hole 72 for pressure balance, allowing gas from the lower end to enter the upper part of the valve stem 70 through this axial through-hole 72. If the lower end surface area and the upper end surface area of the valve stem 70 are the same, the gas pressure can be balanced; however, the gas supplied to the upper part of the valve stem 70 must not leak into the side cavity of the valve seat 20, otherwise gas leakage will occur, thus affecting the performance of the solenoid valve 1. Figure 1 As shown, the sealing body 10 of the present disclosure is disposed in the medium leakage channel between the valve stem 70 and the valve seat 20, and serves to prevent the fluid medium from passing through the medium leakage channel.
[0071] Figure 3 and Figure 4 They are shown respectively Figure 1 and Figure 2 A magnified view of part C in the image. (See image for example.) Figure 3 and Figure 4 As shown, the sealing body 10 is basically located on the axial outer side of the valve stem 70, while the fixed iron core 60 is basically located on the axial outer side of the sealing body 10. Figure 3 and Figure 4 In the illustrated embodiment, the sealing body 10 is fixed to the stationary iron core 60, and therefore the sealing body 10 is stationary. In contrast, the valve stem 70 is movable along the central axis L, which causes the sealing condition between the valve stem 70 and the sealing body 10 to change with the movement of the valve stem 70.
[0072] like Figure 3 and Figure 4 As shown, and in conjunction with reference Figures 1 to 2The valve stem 70 includes an outer periphery 74 and a valve stem recess 75 extending inward from the outer periphery 74 toward the central axis L of the solenoid valve 1. Figure 5 It shows Figure 3 and Figure 4 A perspective view of a schematic embodiment of the valve stem 70. Figure 5 In the embodiment shown, the valve stem recess 75 may be a recess 75 extending along the entire circumferential direction of the valve stem 70 toward the central axis L of the solenoid valve 1.
[0073] like Figure 3 As shown, when solenoid valve 1 is not energized, it is in the open state, and valve stem 70 is disengaged from valve seat 20. At this time, the sealing lip 11 of sealing body 10 overlaps with the recess 75 in the axial direction. Since the recess 75 is concave, a gap G exists between the recess 75 and sealing body 10, allowing the fluid medium to enter this gap G. Therefore, when solenoid valve 1 is not energized, the space SI inside sealing body 10 is connected to the space SE outside sealing body 10, eliminating the pressure difference between them. This helps to relieve the fluid pressure in the space SI inside sealing body 10. Compared to the situation where there is a pressure difference between the inner and outer spaces of sealing body 10, in the embodiment of this disclosure, when solenoid valve 1 is energized, the space SI inside sealing body 10 no longer resists the movement of valve stem 70, making the movement of valve stem 70 easier. This improves the response speed of solenoid valve 1. Furthermore, since a smaller current can be used to drive the solenoid valve 1, energy saving can be achieved and wear on the seal 10 can be reduced, thus increasing the product's service life.
[0074] like Figure 4 As shown, when solenoid valve 1 is energized, valve stem 70 moves under the action of electromagnetic force to abut valve seat 20, at which point solenoid valve 1 is in the closed state. Compared to Figure 3 In the state shown, because the valve stem 70 has moved a certain distance in the axial direction, the recess 75 and the stationary sealing body 10 are misaligned in the axial direction, causing a portion of the sealing body 10, such as the sealing lip 11, to be at the same height as the body of the valve stem 70 (e.g., the portion indicated by the outer periphery 74). Since the body of the valve stem 70 does not have an inwardly recessed portion 75, and the sealing body 10 is made of a material with a certain degree of elasticity, such as rubber, the sealing lip 11 of the sealing body 10 will abut against the body of the valve stem 70 due to its elasticity, resulting in… Figure 3 The gap G shown is in Figure 4 The sealing effect is no longer present. Therefore, when solenoid valve 1 is normally energized and operating, its sealing effect is not affected.
[0075] According to embodiments of this disclosure, when the solenoid valve 1 is energized, the sealing body 10 can still provide a good sealing effect, creating a pressure difference between the space SI inside the sealing body 10 and the space SE outside the sealing body 10. When the solenoid valve 1 is not energized, the pressure difference is effectively eliminated because the fluid medium can enter the gap G between the recess 75 and the sealing body 10, so that the solenoid valve 1 can start working with less frictional resistance the next time it is energized.
[0076] Figure 6 A partially enlarged view of a solenoid valve 1 according to another embodiment of the present disclosure is shown. Figure 7 It shows Figure 6 A perspective view of the valve stem 70.
[0077] Unlike the implementation methods described above, such as Figure 6 and Figure 7 As shown, the valve stem recess 76 is a groove 76 extending toward the central axis L of the solenoid valve 1 from a suitable location around the outer periphery 74 of the valve stem 70. Similar to the aforementioned recess 75, when the solenoid valve 1 is not energized, as... Figure 6 As shown, the sealing lip 11 of the sealing body 10 overlaps with the groove 76 in the axial direction. Since the groove 76 is concave, a gap G exists between the groove 76 and the sealing lip 11 of the sealing body 10, allowing the fluid medium to enter this gap G. Therefore, when the solenoid valve 1 is not energized, the inner and outer spaces of the sealing body 10 are connected, eliminating the pressure difference between them, which helps to relieve the fluid pressure in the space SI within the sealing body 10. When the solenoid valve 1 is energized, the valve stem 70 moves under the action of electromagnetic force to abut against the valve seat 20, at which point the solenoid valve 1 is in the closed state. Compared to... Figure 6 In the state shown, because the valve stem 70 has moved a certain distance in the axial direction, the groove 76 is misaligned with the stationary sealing body 10 in the axial direction, causing a part of the sealing body 10, such as the sealing lip 11, to be at the same height as the body of the valve stem 70. Since the body of the valve stem 70 does not have an inwardly recessed groove 76, the sealing lip 11 of the sealing body 10 will, due to its elasticity, abut against the body of the valve stem 70, resulting in… Figure 6 The gap G shown no longer exists. Therefore, when solenoid valve 1 is normally energized and operating, its sealing effect is not affected.
[0078] according to Figures 6 to 7 The embodiments provide another possibility for the valve stem recess, allowing it to be used in more scenarios. In some embodiments, the groove 76 is formed by removing material from a portion of the outer periphery 74 of the valve stem 70 in the radial direction of the valve stem 70. In this way, Figures 6 to 7 The grooved 76-shaped valve stem recess is easy to machine, convenient to manufacture, and inexpensive. It should be noted that, although... Figures 6 to 7 The groove 76 shown is roughly racetrack-shaped, but this is merely illustrative. Other shapes of grooves, such as elliptical, circular, or polygonal, are also possible.
[0079] Figure 8 A partially enlarged view of a solenoid valve 1 according to yet another embodiment of the present disclosure is shown. Figure 9 It shows Figure 8 A perspective view of the valve stem 70.
[0080] Unlike the implementation methods described above, such as Figure 8 and Figure 9 As shown, the valve stem recess 77 is a keyway 77 extending toward the central axis L of the solenoid valve 1 from a suitable location around the outer periphery 74 of the valve stem 70, and the inner surface 770 of the keyway 77 is flat. Similar to the aforementioned recess 75 and groove 76, when the solenoid valve 1 is not energized, as... Figure 8 As shown, the sealing lip 11 of the sealing body 10 overlaps with the keyway 77 in the axial direction. Since the keyway 77 is concave, a gap G exists between the keyway 77 and the sealing lip 11 of the sealing body 10, allowing the fluid medium to enter this gap G. Therefore, when the solenoid valve 1 is not energized, the inner and outer spaces of the sealing body 10 are connected, eliminating the pressure difference between them, which helps to relieve the fluid pressure in the space SI within the sealing body 10. When the solenoid valve 1 is energized, the valve stem 70 moves under the action of electromagnetic force to abut against the valve seat 20, at which point the solenoid valve 1 is in the closed state. Compared to... Figure 8 In the state shown, because the valve stem 70 has moved a certain distance in the axial direction, the keyway 77 and the stationary sealing body 10 are misaligned in the axial direction, causing a portion of the sealing body 10, such as the sealing lip 11, to be at the same height as the body of the valve stem 70 (e.g., the portion indicated by the outer periphery 74). Since the body of the valve stem 70 does not have an inwardly recessed keyway 77, the sealing lip 11 of the sealing body 10 will, due to its elasticity, abut against the body of the valve stem 70, resulting in… Figure 8 The gap G shown no longer exists. Therefore, when solenoid valve 1 is normally energized and operating, its sealing effect is not affected.
[0081] according to Figures 8 to 9 The embodiments provide another possibility for the valve stem recess, allowing it to be used in more scenarios. In some embodiments, the keyway 77 can be formed by removing material from a portion of the outer periphery 74 of the valve stem 70 along the tangential direction of the valve stem 70 (e.g., by a milling process). In this way, Figures 8 to 9 The valve stem recess in the form of a keyway 77 is also easy to machine, convenient to manufacture, and inexpensive. It should be noted that, although... Figures 8 to 9The inner surface 770 of the keyway 77 shown is flat, but this is merely illustrative. In other embodiments, the inner surface 770 may also be curved.
[0082] Figure 10 and Figure 11 Cross-sectional views of a solenoid valve 1 in an open and closed state, respectively, are shown according to exemplary embodiments of the present disclosure.
[0083] Unlike previous embodiments, in Figure 10 and Figure 11 In the illustrated embodiment, the sealing body 10 is mounted on the valve stem 70, and therefore its axial position changes with the movement of the valve stem 70. In contrast, a clearance structure is disposed on the stationary core 60. In other words, in this pair of structures, the sealing body 10 is movable, while the clearance structure is stationary. For example, the clearance structure is a recess in the stationary core 60 extending from at least a portion of the inner periphery 64 of the stationary core 60 away from the central axis L of the solenoid valve 1. This will be discussed in conjunction with the following description. Figures 12 to 14 Detailed description.
[0084] Figure 12 A partially enlarged view of a solenoid valve 1 according to yet another embodiment of the present disclosure is shown. Figure 13 It shows Figure 12 A perspective view of the fixed iron core 60. Figures 12 to 13 In the illustrated embodiment, the recessed portion of the fixed iron core can be a groove 66 extending at a suitable position around the inner circumference 64 of the fixed iron core 60, away from the central axis L of the solenoid valve 1. When the solenoid valve 1 is not energized, the sealing lip 11 of the sealing body 10 fixed to the valve stem 70 overlaps with the groove 66 on the fixed iron core 60 in the axial direction. Since the groove 66 is recessed in a direction away from the central axis L, a gap G exists between the groove 66 and the sealing lip 11 of the sealing body 10, allowing the fluid medium to enter the gap G. Thus, when the solenoid valve 1 is not energized, the inner and outer spaces of the sealing body 10 can be connected, eliminating the pressure difference between them, which helps to relieve the fluid pressure in the space SI inside the sealing body 10. When the solenoid valve 1 is energized, as... Figure 12 As shown, the valve stem 70 moves to abut against the valve seat 20 under the action of electromagnetic force, at which point the solenoid valve 1 is in the closed state. Compared to the unenergized state, since the valve stem 70 has moved a certain distance in the axial direction, therefore, as... Figure 12As shown, the groove 66 is offset axially from the stationary sealing body 10, causing a portion of the sealing body 10, such as the sealing lip 11, to be at the same height as the main body of the fixed core 60 (e.g., the portion indicated by the inner circumference 64). Since the main body of the fixed core 60 does not have the inwardly recessed groove 66, the sealing lip 11 of the sealing body 10 will abut against the main body of the valve stem 70 due to its elasticity, causing the gap G described above to no longer exist. Therefore, when the solenoid valve 1 is normally energized, its sealing effect is not affected.
[0085] In some embodiments, the groove 66 can be formed by removing material from a portion of the fixed core 60 along the radial direction of the fixed core 60. In this way, Figures 12 to 13 The recessed part of the fixed iron core in the form of groove 66 is easy to process, convenient to manufacture, and inexpensive. It should be noted that, although... Figures 6 to 7 The groove 66 shown is roughly racetrack-shaped, but this is merely illustrative. Other shapes of grooves, such as elliptical, circular, or polygonal, are also possible.
[0086] Figure 14 A partially enlarged view of a solenoid valve 1 according to yet another embodiment of the present disclosure is shown. In the illustrated embodiment, the stationary core recess is a recess 67 extending around the entire inner circumference 64 of the stationary core 60 away from the central axis L of the solenoid valve 1. The function of the recess 67 is similar to that of the groove 66 described above, and will not be repeated here. Figure 14 The embodiments provide another possibility for the fixed core recess, so that it can be used in more scenarios.
[0087] It should be noted that in the above text regarding Figures 10 to 14 In the description, the sealing lip 11 of the sealing body 10 interacts with the stationary core 60, that is, the sealing mating surface that mates with the sealing lip 11 is provided on the stationary core 60. However, in embodiments not shown, this sealing mating surface may also be provided on the valve seat 20. In other words, in other embodiments, the sealing body 10 is provided on the valve stem 70, but the valve seat 20 interacts with the sealing lip 11 of the sealing body 19; such embodiments also fall within the scope of this disclosure.
[0088] Different implementations of the solenoid valve 1 have been described above with reference to the accompanying drawings, but these are merely illustrative and not restrictive. Without departing from the inventive concept of this disclosure, those skilled in the art can conceive of other implementations, all of which fall within the protection scope of the embodiments of this disclosure. Although the embodiments of the present invention have been described above using a vehicle air suspension damping system as an example, it should be understood that the solenoid valve 1 of the embodiments of the present invention can also be used in other scenarios and systems. It should also be understood that those skilled in the art can conceive of other feasible methods for the solenoid valve without departing from the spirit of this disclosure. Such embodiments also fall within the scope of this invention.
[0089] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. An electromagnetic valve (1) characterized by, include: The fixing part includes: Valve seat (20); and Fixed iron core (60). The valve stem (70) is capable of abutting against or disengaging from the valve seat (20), and the valve stem (70) includes an axial through hole (72) extending along the central axis L of the solenoid valve (1). A sealing body (10) is partially disposed on the axial outer side of the valve stem (70), and the fixed iron core (60) is partially disposed on the axial outer side of the sealing body (10); The relative position of the sealing body (10) with one of the fixed iron core (60) and the valve stem (70) is fixed, and the other of the fixed iron core (60) and the valve stem (70) is provided with a clearance structure. When the solenoid valve (1) is not energized, the valve stem (70) disengages from the valve seat (20), and a gap G exists between a portion of the sealing body (10) and the vent structure, allowing the fluid medium to enter the gap G; and When the solenoid valve (1) is energized, the valve stem (70) moves along the central axis L in response to the electromagnetic force of the solenoid valve (1) to abut against the valve seat (20), and a portion of the sealing body (10) abuts against the valve stem (70) or the main body of the fixed iron core (60) to block the fluid medium from entering the gap G.
2. The electromagnetic valve (1) according to claim 1, characterized in that The relative position of the sealing body (10) and the fixed iron core (60) is fixed, and the clearance structure is a valve stem recess extending from at least a portion of the outer periphery (74) of the valve stem (70) toward the central axis L of the solenoid valve (1).
3. The electromagnetic valve (1) according to claim 2, characterized in that The valve stem recess is a recess (75) extending around the entire outer periphery (74) of the valve stem (70) toward the central axis L of the solenoid valve (1).
4. The electromagnetic valve (1) according to claim 2, characterized in that The valve stem recess is a groove (76) extending about a portion of the outer periphery (74) of the valve stem (70) toward the central axis L of the solenoid valve (1).
5. The electromagnetic valve (1) according to claim 4, characterized in that The groove (76) is formed by removing material from a portion of the outer periphery (74) of the valve stem (70) along the radial direction of the valve stem (70).
6. The electromagnetic valve (1) according to claim 2, characterized in that The valve stem recess is a keyway (77) extending about a portion of the outer periphery (74) of the valve stem (70) toward the central axis L of the solenoid valve (1).
7. The electromagnetic valve (1) according to claim 6, characterized in that The keyway (77) is made by removing material from a portion of the outer periphery (74) of the valve stem (70) along the tangential direction of the valve stem (70).
8. The electromagnetic valve (1) according to claim 1, characterized in that The relative position of the sealing body (10) and the valve stem (70) is fixed, and the clearance structure is a recess of the fixed iron core extending away from the central axis L of the solenoid valve (1) from at least a portion of the inner periphery (64) of the fixed iron core (60).
9. The electromagnetic valve (1) according to claim 8, characterized in that The fixed core recess is a groove (66) extending around a portion of the inner periphery (64) of the fixed core (60) away from the central axis L of the solenoid valve (1).
10. The solenoid valve (1) according to claim 9, characterized in that The groove (66) is formed by removing material from the portion of the fixed iron core (60) along the radial direction of the fixed iron core (60).
11. The electromagnetic valve (1) according to claim 8, characterized in that The stator core recess is a recess (67) extending around the entire inner periphery (64) of the stator core (60) away from the center axis L of the electromagnetic valve (1).