A sealing structure for a solenoid valve, solenoid valve, accumulator and automobile

Abstract

The application relates to the technical field of electromagnetic valves, in particular to a sealing structure for an electromagnetic valve, the electromagnetic valve, an energy accumulator and an automobile, wherein the sealing structure is arranged between a valve core and a valve body of the electromagnetic valve, the sealing structure comprises a first sealing piece and a second sealing piece, the first sealing piece is sleeved on the valve core and located on one side close to an armature of the electromagnetic valve; the second sealing piece is sleeved on the valve core and located on one side away from the armature of the electromagnetic valve; in a low-pressure state, the first sealing piece and the second sealing piece are simultaneously tightly abutted against an inner circumferential wall of the valve body, so that dynamic sealing is realized in a double-sealing mode; in a high-pressure state, the second sealing piece is simultaneously abutted against the inner circumferential wall of the valve body and also exerts pressure on the first sealing piece, so that the axial thickness of the first sealing piece is reduced and the radial span of the first sealing piece is increased. The application can better realize dynamic sealing in the two switching states of high pressure and low pressure, and plays a good sealing role.

Description

Technical Field

[0001] This application relates to the field of solenoid valve technology, and in particular to a sealing structure for a solenoid valve, a solenoid valve, an accumulator, and an automobile. Background Technology

[0002] An accumulator is an energy storage device in a hydraulic or pneumatic system. It converts energy in the system into compressed or potential energy at appropriate times and stores it. When the system needs it, it releases this compressed or potential energy by converting it back into hydraulic or pneumatic energy to replenish the system. When the system pressure increases instantaneously, it can absorb this energy to ensure the overall system pressure remains normal. Taking an automotive accumulator as an example, its main function is to provide a series of pulses of oil to the main transmission oil circuit during engine restart, thereby preventing the initial jerking of the car during startup.

[0003] When the car is running, the main oil circuit of the transmission will be maintained at a high pressure value. Under high pressure, the return ball of the solenoid valve is pushed by the oil pressure, the oil inlet passage is opened, and the oil flows through the solenoid valve to the accumulator, pushing the accumulator piston and filling the accumulator with oil.

[0004] During braking / stopping, the solenoid valve on the accumulator is normally closed, and the accumulator is in a pressure-holding state.

[0005] When the car restarts: the solenoid valve of the accumulator is energized, and under the action of electromagnetic force, the sealing surface between the armature and the bushing opens, and the oil in the accumulator is quickly released into the main oil circuit of the transmission, thereby quickly applying pressure to the clutch plate, helping the clutch to quickly engage and transmit torque, effectively preventing the car from sluggishness and jerking during the start-up process.

[0006] In related technologies, the sealing between the valve core and valve body (the valve core is inserted into the valve body) of the accumulator's solenoid valve is achieved by dynamically sealing the valve core by wearing a sealing ring on the outside of the valve core. However, during the starting, stopping, and running of a car, the solenoid valve will experience two switching states: high pressure and low pressure. If the sealing ring is matched to the high pressure sealing requirements to resist the sealing strength, it will generate a large resistance to the movement of the valve core. If the sealing ring is matched to the low pressure sealing requirements to resist the sealing strength, the sealing ring will quickly fail under high pressure when switching to the high pressure state. That is, the dynamic sealing effect of the sealing ring in related technologies will deteriorate when switching between high pressure and low pressure states. Summary of the Invention

[0007] To solve some or all of the above-mentioned technical problems, this application provides a sealing structure for a solenoid valve, a solenoid valve, an accumulator, and an automobile, which can achieve dynamic sealing well in both high-pressure and low-pressure switching states, thus providing a good sealing effect.

[0008] According to a first aspect of the present invention, a sealing structure for a solenoid valve is provided. The sealing structure is disposed between the valve core and the valve body of the solenoid valve, and includes a first sealing element and a second sealing element. The first sealing element is sleeved on the valve core and located on the side close to the armature of the solenoid valve; the second sealing element is sleeved on the valve core and located on the side away from the armature of the solenoid valve. In a low-pressure state, the first sealing element and the second sealing element simultaneously abut against the inner peripheral wall of the valve body to achieve dynamic sealing in a double-seal manner. In a high-pressure state, while the second sealing element abuts against the inner peripheral wall of the valve body, it also applies pressure to the first sealing element, causing the axial thickness of the first sealing element to decrease and the radial span to increase.

[0009] By adopting the above technical solution, firstly, under low pressure, the first and second sealing elements simultaneously press tightly against the inner peripheral wall of the valve body, achieving dynamic sealing through a double-seal method. In this state, the second sealing element plays the primary sealing role. Under high pressure, while pressing tightly against the inner peripheral wall of the valve body, the second sealing element also applies pressure to the first sealing element, causing the axial thickness of the first sealing element to decrease and the radial span to increase. While resisting the pressure of the second sealing element, the first sealing element rapidly increases its resistance to the inner peripheral wall of the valve body, forming a pressure seal with a sealing strength even stronger than that of the second sealing element. This makes it suitable for sealing requirements under high pressure environments. By setting the first and second sealing elements, the sealing structure can achieve dynamic sealing well under both high and low pressure switching states, providing a good sealing effect. Secondly, under high pressure, the greater pressure applied to the second sealing element causes its thickness to decrease and its radial span to increase, pressing tightly against the inner peripheral wall of the valve body. At this time, the second sealing element not only provides a sealing effect but also serves a guiding function. Compared to a single sealing element configuration, this effectively reduces the resistance of the sealing element as it moves within the valve body with the valve core.

[0010] Furthermore, the first sealing element is a first sealing ring made of rubber, and the second sealing element is a second sealing ring made of rubber.

[0011] By adopting the above technical solution, the first sealing ring and the second sealing ring made of rubber can be well adapted to the dynamic sealing of the solenoid valve.

[0012] Furthermore, the longitudinal section of the first sealing ring is circular, and the longitudinal section of the second sealing ring is rectangular.

[0013] By adopting the above technical solution, since the longitudinal section of the second sealing ring is rectangular, when it is subjected to high pressure, the pressure in the direction of the solenoid valve armature is uniform. Under the pressure, the second sealing ring transfers pressure to the first sealing ring in the fastest way, so that the first sealing ring is subjected to uniform pressure and produces radial and axial deformation, thereby pressing against the inner peripheral wall of the valve body.

[0014] Furthermore, the first sealing ring is softer than the second sealing ring.

[0015] By adopting the above technical solution, the first sealing ring is softer than the second sealing ring, so that when the second sealing ring compresses the first sealing ring, the first sealing ring can generate radial and axial deformation more quickly, and the deformation is also relatively large.

[0016] Furthermore, the thickness of the second sealing ring is greater than the thickness of the first sealing ring.

[0017] By adopting the above technical solution, the thickness of the second sealing ring is greater than that of the first sealing ring, which makes the pressure exerted on the first sealing ring by the high pressure on the second sealing ring greater, and the amount of deformation of the first sealing ring under pressure is greater.

[0018] Furthermore, a through hole is provided on the outer peripheral wall of the valve core near the first sealing ring. Multiple through holes are provided and are evenly distributed in a ring on the valve core.

[0019] By adopting the above technical solution, under high pressure, the high-pressure oil will enter the first and second sealing rings from two directions and fill multiple through holes. The first and second sealing rings are simultaneously subjected to the pressure of the oil inlet side and the oil from the through holes, which avoids leakage under large pressure difference. At the same time, the pressure on both sides can also cause the first and second sealing rings to produce a larger amount of deformation, thereby achieving a better sealing effect.

[0020] Furthermore, the through hole includes a first connecting hole and a second connecting hole, which are interconnected. The second connecting hole is located on the side closer to the inner peripheral wall of the valve body, and the diameter of the second connecting hole is larger than that of the first connecting hole.

[0021] By adopting the above technical solution, a first connecting hole and a larger second connecting hole are provided, so that the connecting holes are filled with a relatively large amount of oil. This applies a relatively large force to the first sealing ring and the second sealing ring, which is opposite to the oil pressure on the oil inlet side. Under the combined force from both sides, the first sealing ring and the second sealing ring will produce a larger amount of deformation, thus achieving a better sealing effect.

[0022] According to a second aspect of the present invention, a solenoid valve is provided, which includes a sealing structure as described in the first aspect of this embodiment.

[0023] According to a third aspect of the present invention, an energy storage device is provided, which includes a solenoid valve as described in the second aspect of this embodiment.

[0024] According to a fourth aspect of the present invention, an automobile is provided, which includes an energy storage device as described in the third aspect of this embodiment.

[0025] As can be seen from the above technical solutions, in the sealing structure described in the first aspect of the present invention, the solenoid valve described in the second aspect of the present invention, the accumulator described in the third aspect of the present invention, and the automobile described in the fourth aspect of the present invention, the sealing structure includes a first sealing element and a second sealing element. By setting the first sealing ring and the second sealing ring, the sealing structure can achieve dynamic sealing well under both high-pressure and low-pressure switching states, thus playing a good sealing role. In addition, the sealing structure of the present invention is simple in structure, easy to assemble, safe and reliable in use, and easy to implement and promote. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of the sealing structure according to an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0029] Explanation of reference numerals in the attached drawings: 1. Solenoid valve; 2. Valve core; 21. Through hole; 211. First connecting hole; 212. Second connecting hole; 3. Valve body; 4. First sealing ring; 5. Second sealing ring; 6. Armature. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0031] like Figure 1 As shown, an embodiment of the present invention provides a sealing structure for a solenoid valve. The sealing structure is disposed between the valve core 2 and the valve body 3 of the solenoid valve 1. The sealing structure includes a first sealing element and a second sealing element. The first sealing element is sleeved on the valve core 2 and located on the side close to the armature 6 of the solenoid valve 1. The second sealing element is sleeved on the valve core 2 and located on the side away from the armature 6 of the solenoid valve 1. In the low-pressure state, the first sealing element and the second sealing element simultaneously abut against the inner peripheral wall of the valve body 3 to achieve dynamic sealing in a double-seal manner. In the high-pressure state, while the second sealing element abuts against the inner peripheral wall of the valve body 3, it also applies pressure to the first sealing element, causing the axial thickness of the first sealing element to decrease and the radial span to increase.

[0032] The sealing structure of the embodiments of the present invention can replace the existing sealing structure to achieve dynamic sealing of the solenoid valve 1. Firstly, in the low-pressure state, the first and second sealing elements simultaneously abut against the inner peripheral wall of the valve body 3, achieving dynamic sealing through a double seal. In this state, the second sealing element plays the primary sealing role. In the high-pressure state, while the second sealing element abuts against the inner peripheral wall of the valve body 3, it also applies pressure to the first sealing element, causing the axial thickness of the first sealing element to decrease and the radial span to increase. While resisting the pressure of the second sealing element, the first sealing element rapidly increases its resistance to the inner peripheral wall of the valve body 3, resulting in a sealing strength greater than that of the second sealing element. The sealing element also provides strong pressure resistance, making it suitable for sealing requirements in high-pressure environments. By setting a first sealing element and a second sealing element, the sealing structure can achieve dynamic sealing well in both high-pressure and low-pressure switching states, thus providing a good sealing effect. Secondly, in high-pressure conditions, the greater pressure applied to the second sealing element will cause the thickness of the second sealing element to decrease and the radial span to increase, pressing against the inner peripheral wall of the valve body. At this time, the second sealing element can not only provide a sealing effect but also have a guiding function. Compared with the setting of a single sealing element, it can effectively reduce the resistance of the sealing element when it moves with the valve core 2 within the valve body 3.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, the first sealing element is a first sealing ring 4 made of rubber. The rubber material can be NBR nitrile rubber, HNBR hydrogenated nitrile rubber, SIL silicone rubber, VITON fluororubber, or ACM acrylate rubber, but NBR nitrile rubber is preferred. The second sealing element is a second sealing ring 5 made of rubber. The rubber material can be NBR nitrile rubber, HNBR hydrogenated nitrile rubber, SIL silicone rubber, VITON fluororubber, or ACM acrylate rubber, but ACM acrylate rubber is preferred. It should be noted that the materials selected for the first sealing ring 4 and the second sealing ring 5 should ultimately satisfy the requirement that the first sealing ring 4 is softer than the second sealing ring 5. The softer first sealing ring 4 allows for faster radial and axial deformation when the second sealing ring 5 compresses it, resulting in a larger deformation and thus a better sealing effect.

[0034] like Figure 1 and Figure 2As shown, in this embodiment, the longitudinal section of the first sealing ring 4 is circular, and the longitudinal section of the second sealing ring 5 is rectangular, with the thickness of the second sealing ring 5 being greater than that of the first sealing ring 4. Because the longitudinal section of the second sealing ring 5 is rectangular, when subjected to high pressure, the pressure towards the armature 6 of the solenoid valve 1 is uniform. Under pressure, the second sealing ring 5 transfers pressure to the first sealing ring 4 in the fastest possible manner, causing the first sealing ring 4 to undergo radial and axial deformation due to uniform pressure, thereby pressing against the inner circumferential wall of the valve body 3. The greater thickness of the second sealing ring 5 compared to the first sealing ring 4 results in a greater pressure force on the second sealing ring 5 and a greater amount of deformation of the first sealing ring 4 under pressure.

[0035] In this embodiment, a through-hole is provided on the outer peripheral wall of the valve core 2 near the first sealing ring 4. Figure 1 The through holes 21 shown are provided in multiple manner, and are evenly distributed in a ring on the valve core 2. Taking one set of through holes 21 as an example, the through holes 21 include a first connecting hole 211 and a second connecting hole 212, which are interconnected. The second connecting hole 212 is located closer to the inner peripheral wall of the valve body 3, and its diameter is larger than that of the first connecting hole 211. Under high pressure, high-pressure oil will enter the first sealing ring 4 and the second sealing ring 5 in two ways, filling the multiple through holes 21. The first sealing ring 4 and the second sealing ring 5 are simultaneously subjected to the pressure from the oil inlet side and the oil from the through holes 21, avoiding leakage under large pressure difference. At the same time, the pressure on both sides can also cause the first sealing ring 4 and the second sealing ring 5 to produce a larger deformation, thereby achieving a better sealing effect.

[0036] In summary, regarding the sealing structure of the embodiments of the present invention, in the first aspect, under low pressure, the first sealing ring 4 and the second sealing ring 5 simultaneously abut against the inner peripheral wall of the valve body 3, achieving dynamic sealing through a double seal. Under this condition, the second sealing ring 5 plays the primary sealing role. Under high pressure, while the second sealing ring 5 abuts against the inner peripheral wall of the valve body 3, it also applies pressure to the first sealing ring 4, causing the axial thickness of the first sealing ring 4 to decrease and its radial span to increase. While resisting the pressure of the second sealing ring 5, the first sealing ring 4 rapidly increases its resistance to the inner peripheral wall of the valve body 3, resulting in a seal with a strength even stronger than that of the second sealing ring 5. The pressure-resistant seal is suitable for sealing requirements under high pressure environments. By setting the first sealing ring 4 and the second sealing ring 5, the sealing structure can achieve dynamic sealing well under both high and low pressure switching states, thus playing a good sealing role. Secondly, under high pressure, the greater pressure applied to the second sealing element will cause the thickness of the second sealing element to decrease and the radial span to increase, pressing against the inner peripheral wall of the valve body. At this time, the second sealing element can not only play a sealing role, but also have a guiding role. Compared with the setting of a single sealing element, it can effectively reduce the resistance of the sealing element when it moves with the valve core 2 within the valve body 3.

[0037] like Figure 1 As shown, embodiments of the present invention also provide a solenoid valve 1, which includes the sealing structure described in any of the above embodiments. The solenoid valve 1 achieves a good dynamic sealing effect due to its sealing structure.

[0038] In one embodiment not shown, an energy storage device is involved, which includes the solenoid valve 1 described above.

[0039] In one embodiment not shown, a vehicle is described, which includes the energy storage device described above.

[0040] In the description of this application, it should be understood that the terms "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sealing structure for a solenoid valve, characterized in that: The sealing structure is disposed between the valve core (2) and the valve body (3) of the solenoid valve (1). The sealing structure includes a first sealing element and a second sealing element. The first sealing element is sleeved on the valve core (2) and located on the side close to the armature (6) of the solenoid valve (1). The second sealing element is sleeved on the valve core (2) and located on the side away from the armature (6) of the solenoid valve (1). In the low-pressure state, the first sealing element and the second sealing element are simultaneously pressed against the inner peripheral wall of the valve body (3) to achieve dynamic sealing in a double-seal manner. In the high-pressure state, while the second sealing element is pressed against the inner peripheral wall of the valve body (3), it also applies pressure to the first sealing element, causing the axial thickness of the first sealing element to decrease and the radial span to increase. The first sealing element is also softer than the second sealing element. The first sealing element is a first sealing ring (4) made of rubber material, and the second sealing element is a second sealing ring (5) made of rubber material. The longitudinal section of the first sealing ring (4) is circular, and the longitudinal section of the second sealing ring (5) is rectangular. The thickness of the second sealing ring (5) is greater than the thickness of the first sealing ring (4). A through hole (21) is provided on the outer peripheral wall of the valve core (2) near the first sealing ring (4). There are multiple through holes (21), which are evenly distributed in a ring on the valve core (2). The through hole (21) includes a first connecting hole (211) and a second connecting hole (212). The first connecting hole (211) and the second connecting hole (212) are interconnected. The second connecting hole (212) is located on the side closer to the inner peripheral wall of the valve body (3), and the diameter of the second connecting hole (212) is larger than the diameter of the first connecting hole (211). Under high pressure, the high-pressure oil will enter the first sealing ring (4) and the two sides (5) of the second sealing ring in two separate ways, and fill multiple through holes (21). The first sealing ring (4) and the second sealing ring (5) are simultaneously subjected to the pressure of the oil inlet side and the oil from the through holes (21), which avoids leakage under a large pressure difference. At the same time, the pressure on both sides can also cause the first sealing ring (4) and the second sealing ring (5) to produce a larger amount of deformation, thereby achieving a better sealing effect.

2. A solenoid valve, characterized in that, Includes the sealing structure as described in claim 1.

3. An energy storage device, characterized in that, Includes the solenoid valve (1) as described in claim 2.

4. A car, characterized in that, Includes the energy storage device as described in claim 3.

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