Sealing body for solenoid valve and corresponding solenoid valve

Abstract

The invention relates to a sealing body for a solenoid valve and a corresponding solenoid valve. The sealing body is located in a medium leakage channel of the electromagnetic valve and prevents the fluid medium from passing through the medium leakage channel. The sealing body includes a first seal having a first ramp and a second ramp. The first inclined surface is arranged on the first outer surface, facing the fluid medium, of the first sealing piece and forms an acute angle with the first flowing direction of the fluid medium, so that when the fluid medium flows in the first flowing direction, acting force pointing to the annular inner side of the medium leakage channel is applied to the first inclined surface. The second slope is located on the first outer surface and located on the annular outer side of the first slope, and an acute angle is formed between the second slope and the first flowing direction of the fluid medium, so that when the fluid medium flows, acting force pointing to the annular outer side of the medium leakage channel is applied to the second slope. According to the embodiment of the invention, the acting force of the sealing body on the medium leakage channel can be increased along with the increase of the pressure of the medium, so that a firmer and more reliable sealing effect is ensured.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure generally relate to the field of valve technology, and more particularly to a sealing body for a solenoid valve and a corresponding solenoid valve. Background Art

[0002] An air suspension system is a type of vehicle suspension system. It consists of multiple chambers, with solenoid valves located between them. Opening and closing the solenoid valves controls the flow between adjacent chambers. Air suspension systems require that when the solenoid valve is closed, it must be protected from pressure surges between chambers to prevent gas leakage. This places high demands on the sealing performance of the solenoid valve.

[0003] However, existing sealing structures in solenoid valves still have shortcomings. For example, the sealing performance of existing solenoid valves is often static and cannot be adjusted with changes in the medium pressure in either the internal or external directions. Therefore, as the medium pressure increases, the sealing performance of existing solenoid valves cannot be further optimized, which still cannot meet the requirements of air suspension damping systems. Therefore, a sealing structure that can optimize the sealing performance of solenoid valves is urgently needed. Summary of the Invention

[0004] To at least overcome the problems existing in existing solenoid valves and / or other potential problems, exemplary embodiments of the present disclosure provide a sealing body for a solenoid valve and a corresponding solenoid valve.

[0005] In a first aspect, embodiments of the present disclosure relate to a sealing body for a solenoid valve. The sealing body is disposed in a medium leakage channel of the solenoid valve to prevent a fluid medium from passing through the medium leakage channel, wherein the sealing body comprises: a first sealing member, comprising: a first inclined surface located on a first outer surface of the first sealing member facing the fluid medium and forming an acute angle with a first flow direction of the fluid medium, such that when the fluid medium flows along the first flow direction, a force is applied to the first inclined surface directed toward the inner side of an annular portion of the medium leakage channel; and a second inclined surface located on a first outer surface of the first sealing member and located outside the annular portion of the first inclined surface, the second inclined surface forming an acute angle with the first flow direction of the fluid medium, such that when the fluid medium flows along the first flow direction, a force is applied to the second inclined surface directed toward the outer side of an annular portion of the medium leakage channel.

[0006] According to the embodiments of the present disclosure, the force exerted by the sealing body on the medium leakage channel increases as the pressure of the medium increases, thereby ensuring a more secure and reliable sealing effect.

[0007] In some embodiments, the sealing body further comprises: a second sealing member abutting against the first sealing member and comprising: a third inclined surface located on a second outer surface of the second sealing member facing the fluid medium and forming an acute angle with a second flow direction of the fluid medium, such that when the fluid medium flows in the second flow direction, a force directed toward the annular inner side of the medium leakage channel is applied to the third inclined surface, wherein the second flow direction is opposite to the first flow direction; and a fourth inclined surface located on the second outer surface of the second sealing member and located annularly outer side of the third inclined surface, the fourth inclined surface forming an acute angle with the second flow direction of the fluid medium, such that when the fluid medium flows in the second flow direction, a force directed toward the annular outer side of the medium leakage channel is applied to the fourth inclined surface. With this embodiment, a good sealing effect can be ensured regardless of the direction in which the medium flows through the medium leakage channel.

[0008] In some embodiments, the first seal further comprises a first inner surface, a portion of the first inner surface abutting against a wall of the medium leakage channel, and another portion of the first inner surface having a gap therebetween to form a space for accommodating lubricant. This embodiment effectively stores and retains lubricant, preventing the lubricant from flowing out of the seal due to movement of the solenoid valve shaft during operation of the solenoid valve.

[0009] In some embodiments, the second seal further comprises a second inner surface, a portion of the second inner surface abutting against the wall of the medium leakage channel, and a gap between the second inner surface and the wall of the medium leakage channel to form a space for accommodating lubricant. This embodiment effectively stores and retains lubricant, preventing the lubricant from flowing out of the seal due to movement of the solenoid valve shaft during operation of the solenoid valve.

[0010] In some embodiments, the sealing body further comprises: a first fixing member, one end of which is fixed to the solenoid valve and the other end of which is disposed within the first sealing member and does not protrude beyond an edge of the first sealing member. With this embodiment, a secure connection between the sealing body and the structure of the solenoid valve can be ensured.

[0011] In some embodiments, the sealing body further comprises: a second fixing member, one end of which is fixed to the solenoid valve and the other end of which is disposed within the second sealing member and does not protrude beyond an edge of the second sealing member. With this embodiment, a secure connection between the sealing body and the structure of the solenoid valve can be ensured.

[0012] In some embodiments, the first seal and the second seal are formed separately. In some embodiments, the first seal and the second seal are formed integrally. Utilizing these embodiments, the seal can be adapted to a wider range of usage scenarios.

[0013] In some embodiments, the first sealing member and the second sealing member are of the same shape and are symmetrically arranged with respect to a horizontal plane perpendicular to the flow direction of the fluid medium. With this embodiment, the manufacturing of the sealing body is simpler and more convenient.

[0014] In a second aspect, embodiments of the present disclosure relate to a solenoid valve comprising the sealing body according to the first aspect.

[0015] These and other aspects of the present disclosure will become apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] In the attached figure:

[0018] Figure 1 A cross-sectional view of a solenoid valve according to an exemplary embodiment of the present disclosure is shown.

[0019] Figure 2 A cross-sectional view of a sealing body that can be used in a solenoid valve according to an exemplary embodiment of the present disclosure is shown.

[0020] Figure 3 A cross-sectional view illustrating a sealing body that can be used in a solenoid valve according to another exemplary embodiment of the present disclosure; and

[0021] Figure 4 A cross-sectional view of a sealing body that can be used in a solenoid valve according to another exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0022] The principles of the present 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 help those skilled in the art understand and implement the present disclosure, without implying any limitation on the scope of the present disclosure. In addition to the methods described below, the disclosure described herein can be implemented in various ways.

[0023] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0024] References in this disclosure to "one embodiment," "an embodiment," "an example embodiment," etc. indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment must include the particular feature, structure, or characteristic. Furthermore, these phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, those skilled in the art believe that it is within the knowledge of those skilled in the art to apply such feature, structure, or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0025] It should be understood that although the terms "first" and "second," etc. may 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 example embodiments. The term "and / or" as used herein includes any and all combinations of one or more of the listed terms.

[0026] In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0027] The terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the example embodiments. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the terms "comprises," "includes," "has," "having," "includes," and / or "comprising," when used herein, indicate the presence of the recited features, elements, and / or components, etc., but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0028] As mentioned above, more and more vehicles are being equipped with air suspension systems. These systems incorporate solenoid valves, installed between adjacent chambers within the system, to control the flow of air between these chambers. Existing solenoid valves have several drawbacks, such as poor sealing, which can cause the valve to open due to air pressure between the chambers when closed, thus affecting its performance.

[0029] In order to at least solve the above problems, the embodiment of the present disclosure provides a solenoid valve 1 for an air suspension vibration reduction system of a vehicle. Figures 1 to 4The specific structures of the solenoid valve 1 and the sealing body 10 thereof according to an embodiment of the present disclosure will be described.

[0030] Figure 1 A cross-sectional view of a solenoid valve 1 in an open state according to an exemplary embodiment of the present disclosure is shown. As shown, the solenoid valve 1 connects two chambers, A and B, each filled with a gaseous medium. The solenoid valve 1 includes a valve seat 20 having an axial hole 21 connected to chamber A and a lateral hole 22 connected to chamber B.

[0031] The following combination Figure 1 Briefly describe the working process of the solenoid valve 1. When the solenoid 30 of the solenoid valve 1 is energized, a magnetic field will be generated. The armature 40 moves under the action of the magnetic field, and as a moving component, it overcomes the elastic force of the spring 50 and moves toward the yoke sleeve 60. The armature 40 and the armature shaft 42 have an interference fit, causing the armature shaft 42 to move toward the yoke sleeve 60 together with the armature 40. The armature shaft 42 and the closing body 70 also have an interference fit, so that the closing body 70, the armature shaft 42, and the armature 40 move synchronously toward the valve seat 20. As the closing body 70 finally abuts against the valve seat 20, the leakage path between chamber A and chamber B will be closed. Finally, the closing body 70 contacts the valve seat 20 to form a seal, and the solenoid valve 1 is now in a closed state. When the solenoid valve 1 is closed, the air pressure in chamber A connected to the shaft hole 21 will act on the lower end face of the closing body 70, and the air pressure is in the opening direction of the solenoid valve 1. If the gas pressure exceeds the electromagnetic force, the gas pressure will push the sealing function of the closing body, causing the electromagnetic valve 1 to leak and fail. Figure 1 As shown, a pressure balancing hole 72 is arranged on the closing body 70, so that the gas at the lower end can enter the upper part of the closing body 70 through the pressure balancing hole 70. If the area of ​​the lower end surface of the closing body 70 is the same as the area of ​​the upper end surface, the gas pressure can be balanced; however, the gas passing through the upper part of the closing body 70 is not allowed to leak into the side cavity of the valve seat 20, otherwise it will cause gas leakage and affect the performance of the solenoid valve 1. Figure 1 As shown, the sealing body 10 of the embodiment of the present disclosure is arranged in the medium leakage channel between the closing body 70 and the valve seat 20, and plays a role in preventing the fluid medium from passing through the medium leakage channel.

[0032] Figure 2 FIG1 shows a cross-sectional view of a sealing body 10 that can be used in a solenoid valve 1 according to an embodiment of the present disclosure. The sealing body 10 can be formed by joining two parts, upper and lower, to seal the medium leakage path in two directions. Figure 2 As shown, the sealing body 10 may include a first sealing member 110 and a second sealing member 120. Figure 2In the illustrated embodiment, the first seal 110 and the second seal 120 may have the same shape and be symmetrically arranged with respect to a horizontal plane perpendicular to the flow directions D1 and D2 of the fluid medium. Of course, this is not necessary, and the first seal 110 and the second seal 120 may have a certain degree of asymmetry and do not have to have exactly the same shape, as long as the two parts can be tightly and firmly joined together to prevent the fluid medium from passing through the medium leakage channel. In some embodiments, the first seal 110 and the second seal 120 may be formed as separate parts, which is convenient for assembly into the solenoid valve 1 and is particularly suitable for solenoid valves with relatively cramped space. In other embodiments, the first seal 110 and the second seal 120 may also be formed as one piece. This approach can have higher reliability.

[0033] like Figure 2 As shown, the first sealing member 110 includes a first inclined surface 111 and a second inclined surface 112, wherein the first inclined surface 111 is located on the first outer surface 117 of the first sealing member 110 facing the fluid medium and forms an acute angle with the first flow direction D1 of the fluid medium. Therefore, when the fluid medium flows along the first flow direction D1, a force F is applied to the first inclined surface 111. 111 , due to the force F exerted by the fluid medium on the first inclined surface 111 111 is substantially perpendicular to the first inclined surface 111, so the force F 111 Pointing to the inner side of the ring of the medium leakage channel.

[0034] Continue to refer Figure 2 The second inclined surface 112 is located on the first outer surface 117 of the first sealing member 110 and is located outside the annular shape of the first inclined surface 111. The second inclined surface 112 forms an acute angle with the first flow direction D1 of the fluid medium. Therefore, when the fluid medium flows along the first flow direction D1, the force F applied to the second inclined surface 112 112 The force F exerted by the fluid medium on the first inclined surface 111 increases as the pressure of the fluid medium increases. 111 and the force F applied to the first inclined surface 112 112 The first sealing member 110 will become larger accordingly, so that the first sealing member 110 is more firmly attached to the wall of the medium leakage channel, ensuring good sealing performance.

[0035] Continue to refer Figure 2 When the fluid medium flows through the medium leakage channel where the sealing body 10 is located along the second flow direction D2 opposite to the first flow direction D1, the second sealing member 120 of the sealing body 10 will take effect. Figure 2As shown, the second seal 120 includes a third inclined surface 123 and a fourth inclined surface 124 on a second outer surface 127 facing the fluid medium and facing the second flow direction D2 of the fluid medium. The third inclined surface 123 is located on the inner side of the ring, and the fourth inclined surface 124 is located on the outer side of the ring. Both of them form an acute angle with the second flow direction D2 of the fluid medium. Therefore, when the fluid medium flows along the second flow direction D2, a force F directed to the inner side of the ring of the medium leakage channel will be applied to the third inclined surface 123. 123 And the force F directed to the outer side of the annular medium leakage channel is applied to the fourth inclined surface 124. 124 As the pressure of the fluid medium increases, the force F exerted by the fluid medium on the third inclined surface 123 123 and the force F applied to the fourth inclined surface 124 124 The second sealing member 120 will become larger accordingly, so that the second sealing member 120 is more firmly attached to the wall of the medium leakage channel to ensure good sealing performance.

[0036] Continue to refer Figure 2 The sealing body 10 may further include a fixing member 134 disposed therein. The fixing member 134 is designed to limit the axial movement of the entire sealing body 10 under the influence of medium pressure or friction. Figure 1 The fixing member 134 has a protruding end 135, which is fixed to the valve seat 20 of the solenoid valve 1, and is used to fix the sealing body 10 to the valve seat 20 of the solenoid valve 1. Figure 2 As shown, the other end of the fixing member 134 opposite to the one end 135 does not protrude beyond the edges of the first sealing member 110 and the second sealing member 120 , but is completely wrapped in the first sealing member 110 and the second sealing member 120 .

[0037] Figure 3 FIG. 1 is a cross-sectional view of a sealing body 10 that can be used in a solenoid valve 1 according to another embodiment of the present disclosure, wherein reference numeral 20 schematically represents a valve seat in the solenoid valve 1 .

[0038] like Figure 3 As shown, the first seal 110 further includes a first inner surface 118. A portion 115 of the first inner surface 118 abuts against the wall of the medium leakage channel, and a gap is formed between the other portion 116 and the wall 200 of the valve seat 20, thereby forming a space for accommodating lubricant. In this way, when the closing body 70 moves axially along the solenoid valve 1 along with the armature 40 and the armature shaft 42, the lubricant will not be carried out of the gap but will be firmly retained in the space, thereby avoiding waste of lubricant.

[0039] Similarly, if Figure 3As shown, the second sealing member 120 further includes a second inner surface 128 , a portion 125 of the second inner surface 128 abuts against the wall of the medium leakage channel, and a gap exists between the other portion 126 and the wall 700 of the closing body 70 to form a space for accommodating lubricant.

[0040] like Figure 3 As shown, a split fixing member can be used to achieve a fixed connection between the sealing body 10 and the valve seat 20 of the solenoid valve 1. Figure 3 In the illustrated embodiment, the fixing member may include a first fixing member 114 and a second fixing member 124. One end of the first fixing member 114 is fixed to a structure of the solenoid valve 1, such as the valve seat 20, while the other end is disposed within the first sealing member 110 and does not protrude beyond the edge of the first sealing member 110, but is completely enclosed within the first sealing member 110. One end of the second fixing member 124 is fixed to a structure of the solenoid valve 1, such as the valve seat 20, while the other end is disposed within the second sealing member 120 and does not protrude beyond the edge of the second sealing member 120, but is completely enclosed within the second sealing member 120. The first fixing member 114 and the second fixing member 124 thus achieve a connection between the sealing body 10 and the valve seat 20 of the solenoid valve 1 and can limit axial movement of the entire sealing body 10 under the influence of medium pressure, friction, and the like.

[0041] In other embodiments, the sealing body 10 may not include both the first sealing member 110 and the second sealing member 120 , but may include only one of them. Figure 4 FIG. 2 shows a cross-sectional view of a sealing body 10 that can be used in a solenoid valve 1 according to another embodiment of the present disclosure. Figure 4 In the illustrated embodiment, the sealing body 10 includes only the first sealing member 110. It should be understood that the sealing body 10 may include only the second sealing member 120. This can reduce the cost of the sealing body 10 and make it suitable for more usage scenarios.

[0042] The embodiments of the present disclosure also relate to a solenoid valve 1. The solenoid valve 1 comprises the sealing body 10 described above, which is used to seal a medium leakage channel between a closing body 70 and a valve seat 20 of the solenoid valve 1.

[0043] While the embodiments of the present invention are described above using a vehicle air suspension damping system as a scenario, it should be understood that the sealing body 10 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 embodiments of the solenoid valve without departing from the principles of the present disclosure. Such embodiments also fall within the scope of the present invention.

[0044] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method 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 in the scope of protection of the present invention.

Claims

1. A sealing body (10) for a solenoid valve, arranged in a medium leakage channel of the solenoid valve to prevent a fluid medium from passing through the medium leakage channel, wherein the sealing body (10) comprises: A first sealing member (110) comprising: a first inclined surface (111) located on a first outer surface (117) of the first sealing member (110) facing the fluid medium and forming an acute angle with a first flow direction (D1) of the fluid medium, so that when the fluid medium flows along the first flow direction (D1), a force directed toward the inner side of the annular ring of the medium leakage channel is applied to the first inclined surface (111); and A second inclined surface (112) is located on the first outer surface (117) of the first sealing member (110) and is located on the annular outer side of the first inclined surface (111). The second inclined surface (112) forms an acute angle with the first flow direction (D1) of the fluid medium, so that when the fluid medium flows along the first flow direction (D1), a force directed toward the annular outer side of the medium leakage channel is applied to the second inclined surface (112).

2. The sealing body (10) according to claim 1, further comprising: A second sealing member (120) abuts against the first sealing member (110) and comprises: a third inclined surface (123) located on a second outer surface (127) of the second sealing member (120) facing the fluid medium and forming an acute angle with a second flow direction (D2) of the fluid medium, so that when the fluid medium flows along the second flow direction (D2), a force directed toward the inner side of the annular portion of the medium leakage channel is applied to the third inclined surface (123), wherein the second flow direction (D2) is opposite to the first flow direction (D1); and A fourth inclined surface (124) is located on the second outer surface (127) of the second sealing member (120) and on the annular outer side of the third inclined surface (123), and the fourth inclined surface (124) forms an acute angle with the second flow direction (D2) of the fluid medium, so that when the fluid medium flows along the second flow direction (D2), a force directed toward the annular outer side of the medium leakage channel is applied to the fourth inclined surface (124).

3. The sealing body (10) according to claim 1 or 2, wherein the first sealing member (110) further comprises: A first inner surface (118) has a portion (115) abutting against the wall of the medium leakage channel, and a gap exists between the other portion (116) and the wall of the medium leakage channel to form a space for accommodating lubricant.

4. The sealing body (10) according to claim 2, wherein the second sealing member (120) further comprises: A second inner surface (128), a portion (125) of the second inner surface (128) abuts against the wall of the medium leakage channel, and a gap exists between the other portion (126) and the wall of the medium leakage channel to form a space for accommodating lubricant.

5. The sealing body (10) according to claim 1 or 2, further comprising: A first fixing member (114) has one end fixed to the solenoid valve and the other end disposed in the first sealing member (110) and does not protrude beyond the edge of the first sealing member (110).

6. The sealing body (10) according to claim 2 or 4, further comprising: A second fixing member (124) has one end fixed to the solenoid valve and the other end disposed in the second sealing member (120) and does not protrude beyond the edge of the second sealing member (120).

7. The sealing body (10) according to claim 2, wherein the first sealing member (110) and the second sealing member (120) are formed separately.

8. The sealing body (10) according to claim 2, wherein the first sealing member (110) and the second sealing member (120) are integrally formed.

9. The sealing body (10) according to claim 2, wherein the first sealing member (110) and the second sealing member (120) are of the same shape and are symmetrically arranged with respect to a horizontal plane perpendicular to a flow direction of the fluid medium.

10. A solenoid valve (1), comprising: The sealing body (10) according to any one of claims 1 to 9.

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