Valve device and sealing member

Abstract

A valve device, comprising a valve body (11), a valve core (12) and a sealing member (13), wherein the valve body (11) has at least part of a valve cavity (111); the valve core (12) and the sealing member (13) are arranged in the valve cavity (111); the valve core (12) comprises a core body (121); and the sealing member (13) comprises a static sealing section (131) and a dynamic sealing section (132), wherein the static sealing section (131) is statically and sealingly connected to one of the valve body (11) and the valve core (12), and when the valve device operates, the dynamic sealing section (132) abuts against the other one of the valve body (11) and the valve core (12). The valve device comprises a flow channel cavity (14); the dynamic sealing section (132) is closer to a wall portion corresponding to the flow channel cavity (14) than the static sealing section (131); and the sealing member (13) comprises a fluid contact section (139), which is arranged facing away from the dynamic sealing section (132) and at least exposed to the flow channel cavity (14). Such a configuration is conducive to reducing the friction force on the dynamic sealing section, and in turn conducive to reducing the friction force on the sealing member, thereby facilitating a reduction in the wear and tear of the sealing member.

Description

Valve device and seal

[0001] The present application claims priority to the Chinese patent application No. 202411351099.X, filed on September 26, 2024, and entitled "Valve device and seal", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of fluid control, and in particular to a valve device and a seal for a vehicle thermal management system. BACKGROUND

[0003] At present, a control valve usually comprises a valve core, a valve body and a sealing assembly, the sealing assembly is arranged between the valve body and the valve core to make the control valve have better sealing performance. The sealing assembly comprises a seal, in order to reduce fluid leakage in the working process of the control valve, the two side surfaces of the seal are tightly sealed with the valve body and the valve core respectively, and the two sides of the seal are in a forced compression state, the greater the compression amount of the seal, the better the sealing performance between the seal and the valve body and the valve core; however, in the rotating process of the valve core, the frictional resistance between the valve core and the seal becomes larger, and the seal is more prone to wear. SUMMARY

[0004] The purpose of the present application is to provide a valve device and a seal, which are beneficial to reduce the frictional force on the seal and further reduce the wear of the seal.

[0005] To achieve the above-mentioned purpose, a technical solution of the present application is as follows: a valve device, the valve device comprising a valve body, a valve core and a seal, the valve body having at least part of a valve cavity, the valve core and the seal being arranged in the valve cavity, the valve core 12 comprising a core body, the seal comprising a static sealing section and a dynamic sealing section, the static sealing section being in static sealing connection with one of the valve body and the valve core, and the dynamic sealing section being in abutment with the other one of the valve body and the valve core during the working of the valve device; the valve device comprising a flow passage cavity, the dynamic sealing section being close to a wall part corresponding to the flow passage cavity relative to the static sealing section, the seal comprising a fluid contact section, the fluid contact section being arranged away from the dynamic sealing section, and at least the fluid contact section being exposed to the flow passage cavity.

[0006] The technical scheme of the present application is as follows: a sealing element is used for sealing between a valve body and a valve core, the valve body has at least part of a valve cavity, the valve core and the sealing element are arranged in the valve cavity, the valve core comprises a core body, the sealing element comprises a static sealing section and a dynamic sealing section, the static sealing section is in static sealing connection with one of the valve body and the valve core, and the dynamic sealing section is in abutment with the other one of the valve body and the valve core during operation of the valve device; the valve device comprises a flow passage cavity, the dynamic sealing section is close to a wall part corresponding to the flow passage cavity relative to the static sealing section, the sealing element comprises a fluid contact section, the fluid contact section is arranged away from the dynamic sealing section, and at least the fluid contact section is exposed to the flow passage cavity. In this way, only the static sealing section is located between the wall part corresponding to the valve cavity and the outer wall part of the valve core, and is subjected to extrusion of the wall part corresponding to the valve cavity and / or the outer wall of the valve body, at least the fluid contact section is not subjected to extrusion of the wall part corresponding to the valve cavity or the outer wall part corresponding to the valve core, which is beneficial to reducing the friction force on the dynamic sealing section, and further beneficial to reducing the friction force on the sealing element and further reducing the wear of the sealing element.

[0007] The technical scheme of the present application is as follows: a sealing element is used for sealing between a valve body and a valve core, the valve body has at least part of a valve cavity, the valve core and the sealing element are arranged in the valve cavity, the valve core comprises a core body, the sealing element comprises a static sealing section and a dynamic sealing section, the static sealing section is in static sealing connection with one of the valve body and the valve core, and the dynamic sealing section is in abutment with the other one of the valve body and the valve core during operation of the valve device; the valve device comprises a flow passage cavity, the dynamic sealing section is close to a wall part corresponding to the flow passage cavity relative to the static sealing section, the sealing element comprises a fluid contact section, the fluid contact section is arranged away from the dynamic sealing section, and at least the fluid contact section is exposed to the flow passage cavity. In this way, only the static sealing section is located between the wall part corresponding to the valve cavity and the outer wall part of the valve core, and is subjected to extrusion of the wall part corresponding to the valve cavity and / or the outer wall of the valve body, at least the fluid contact section is not subjected to extrusion of the wall part corresponding to the valve cavity or the outer wall part corresponding to the valve core, which is beneficial to reducing the friction force on the dynamic sealing section, and further beneficial to reducing the friction force on the sealing element and further reducing the wear of the sealing element.

[0008] The technical scheme of the present application is as follows: a sealing element is used for sealing between a valve body and a valve core, the valve body has at least part of a valve cavity, the valve core and the sealing element are arranged in the valve cavity, the valve core comprises a core body, the sealing element comprises a static sealing section and a dynamic sealing section, the static sealing section is in static sealing connection with one of the valve body and the valve core, and the dynamic sealing section is in abutment with the other one of the valve body and the valve core during operation of the valve device; the valve device comprises a flow passage cavity, the dynamic sealing section is close to a wall part corresponding to the flow passage cavity relative to the static sealing section, the sealing element comprises a fluid contact section, the fluid contact section is arranged away from the dynamic sealing section, and at least the fluid contact section is exposed to the flow passage cavity. In this way, only the static sealing section is located between the wall part corresponding to the valve cavity and the outer wall part of the valve core, and is subjected to extrusion of the wall part corresponding to the valve cavity and / or the outer wall of the valve body, at least the fluid contact section is not subjected to extrusion of the wall part corresponding to the valve cavity or the outer wall part corresponding to the valve core, which is beneficial to reducing the friction force on the dynamic sealing section, and further beneficial to reducing the friction force on the sealing element and further reducing the wear of the sealing element. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a schematic structural diagram of a valve device of the present application.

[0010] Fig. 2 is a schematic structural diagram of an embodiment of the valve device in Fig. 1 in one direction.

[0011] Fig. 3 is a schematic structural diagram of an enlarged structure at I in Fig. 2.

[0012] Fig. 4 is a perspective view of the valve device of the present application in another direction.

[0013] Fig. 5 is a sectional view of Fig. 4 along A-A.

[0014] Fig. 6 is an enlarged view of II in Fig. 5.

[0015] Fig. 7 is a perspective view of the sealing member of the valve device in one direction.

[0016] Fig. 8 is a sectional view of Fig. 7 along B-B.

[0017] Fig. 9 is a perspective view of the sealing member of the valve device in another direction.

[0018] Fig. 10 is a sectional view of another embodiment of the valve device in one direction.

[0019] Fig. 11 is an enlarged view of III in Fig. 10.

[0020] Fig. 12 is a perspective view of the sealing member of the valve device in one direction.

[0021] Fig. 13 is a perspective view of the sealing member of the valve device in another direction.

[0022] BRIEF DESCRIPTION OF DRAWINGS: 100, valve device; 11, valve body; 111, valve cavity; 112, communication port; 113, side wall portion; 114, top wall portion; 115, bottom cover portion; 12, valve core; 121, core body; 122, through cavity; 1221, through port; 13, sealing member; 131, static sealing segment; 132, dynamic sealing segment; 133, fixed portion; 134, abutting portion; 1341, connecting segment; 135, recessed portion; 1351, recessed cavity; 1352, bottom portion; 136, reinforcing portion; 137, reinforcing portion; 138, hole; 139, fluid contact segment; 140, side opposite to the static sealing segment; 13a, rib portion; 13b, inner recessed portion; 14, flow channel cavity; 16, connector; 161, flow channel; 162, port; 17, limiting portion; 171, limiting groove. DETAILED DESCRIPTION

[0023] The present application will be further described below in conjunction with the drawings and specific technical solutions:

[0024] The technical solution of the present application provides a valve device, which can be used in a vehicle thermal management system, in particular, a cooling liquid circulation system, and can play a flow path isolation, conduction and switching function for the thermal management system.

[0025] Please refer to FIG. 1 to FIG. 13, a valve device 100 is shown in the embodiment of the present application, the valve device 100 includes a valve body 11, a valve core 12 and a sealing element 13, the valve body 11 has a valve cavity 111 and a communication port 112, the communication port 112 can be at least one, specifically, in the embodiment, the communication port 112 is three or four. The valve body 11 includes a side wall part 113, a top wall part 114 and a bottom cover part 115, at least part of the side wall part 113 is located between the bottom cover part 115 and the top wall part 114, the side wall part 113, the top wall part 114 and the bottom cover part 115 define at least part of the valve cavity 111, the communication port 112 is located on the inner surface of the side wall part 113, the inner surface of the side wall part 113 faces the valve cavity 111, the top wall part 114 and the bottom cover part 115 are sealingly connected with the side wall part 113, at least part of the valve core 12 is located in the valve cavity 111 and the valve core 12 can be rotated under the driving. Along the radial direction of the side wall part 113, part of the sealing element 13 is located between the side wall part 113 and the valve core 12, for sealing the valve device 100, the valve core 12 includes a guide cavity 122, the guide cavity 122 has a guide port 1221, the sealing element 13 has a hole 138 which is opposite to the communication port 112 and is communicated, the hole 138 is also communicated with the guide port 1221, so as to communicate the corresponding communication port 112. It should be noted that the flow channel cavity 14 can be understood as follows: the channel through which the working medium flows when the hole 138, the guide port 1221, the guide cavity 122 and the communication port 112 are communicated is the flow channel cavity 14.

[0026] Optionally, the valve device 100 further includes a driving assembly, the driving assembly includes a driving element, the driving element can include a motor or a combination of a motor and a transmission gear set, the driving element is drivingly connected with the valve core 12, so that the driving element drives the valve core 12 to rotate, and the guide function of different communication ports 112 is realized through the rotation of the valve core 12.

[0027] In other embodiments, the valve device 100 further includes a connecting pipe 16, the connecting pipe 16 has a flow channel 161, one end of the flow channel 161 is communicated with the corresponding communication port 112, and the other end forms a port 162 of the valve device 100, the port 162 can be integrated in the same plane or arranged according to the requirement, or the connecting pipe 16 can be connected with other fluid components in the heat management system, for example, the fluid components can be heat exchangers, water pumps and the like.

[0028] As an implementation, please refer to the valve device 100 shown in FIGS. 1-13, the valve device 100 includes a valve body 11, a valve core 12, and a sealing element 13, the valve body 11 has a valve cavity 111, the valve core 12 and the sealing element 13 are arranged in the valve cavity 111, the valve core 12 includes a core body 121, the sealing element 13 includes a static sealing segment 131 and a dynamic sealing segment 132, the static sealing segment 131 is in static sealing connection with one of the valve body 11 and the valve core 12, and the dynamic sealing segment 132 is in abutment with the other one of the valve body 11 and the valve core 12 during operation of the valve device 100; the valve device 100 includes a flow passage cavity 14, the flow passage cavity 14 is capable of flowing through a working medium, the dynamic sealing segment 132 is closer to a wall portion corresponding to the flow passage cavity 14 relative to the static sealing segment 131, the sealing element 13 includes a fluid contact segment 139, the fluid contact segment 139 is arranged away from the dynamic sealing segment 132, and at least the fluid contact segment 139 is exposed to the flow passage cavity 14. For the convenience of describing the relationship between the sealing element and the valve body and the valve core, please refer to FIGS. 5 and 6, which exemplarily show that, on a transverse cross section perpendicular to an axis of the valve device 100, along a circumferential direction of the valve device 100, the dynamic sealing segment 132 is closer to the wall portion corresponding to the flow passage cavity 14 relative to the static sealing segment 131.

[0029] Thus, the first, only static sealing section 131 is located between the wall part corresponding to the valve cavity 111 and the outer wall part of the valve core 12, which is extruded by the wall part corresponding to the valve cavity 111 and / or the outer wall of the valve core 12, and the fluid contact section 139 on the side away from the dynamic sealing section 132 is not extruded by the wall part corresponding to the valve cavity 111 or the outer wall part of the valve core 12, which is beneficial to reduce the friction force on the dynamic sealing section 132, and further beneficial to reduce the friction force on the sealing element 13, and further beneficial to reduce the wear of the sealing element 13, and thus beneficial to improve the service life of the sealing element 13.

[0030] Second, since the sealing of the dynamic sealing section 132 in the sealing position is achieved by the pressure of the working medium in the flow passage cavity 14, the sealing member 13 can be designed without considering the design of a high sealing pressure to resist high pressure, so that the sealing member 13 works in a small pressure environment for at least more than half of the entire life cycle, thereby improving the service life of the sealing member 13.

[0031] Third, since the sealing of the dynamic sealing section 132 in the sealing position is achieved by the pressure of the working medium in the flow passage cavity 14, the sealing member 13 can be designed without considering the design of a high sealing pressure to resist high pressure, which is conducive to reducing the driving force of the valve core 12, thereby facilitating the reduction of the driving assembly structure, for example, the output power of the motor can be reduced, thereby laying a certain foundation for the reduction of the valve device 100.

[0032] As a specific implementation, please refer to FIGS. 1-9, along the radial direction of the valve device 100, the sealing member 13 has an elastic deformation amount, and the dynamic sealing section 132 can elastically abut against the other of the valve body 11 and the valve core 12. In this way, the distance between the valve body 11 and the valve core 12 along the radial direction of the valve device 100 can be allowed to fluctuate within a certain range, so that first, the manufacturing size precision of the parts, such as the valve body 11 and / or the valve core 12, can be reduced, thereby laying a certain foundation for reducing the cost of the valve device 100. Second, when the pressure of the working medium flowing through the flow passage cavity 14 is small, the sealing between the valve body 11 and the valve core 12 can also be achieved.

[0033] As an implementation, please refer to FIGS. 1-9, the sealing member 13 includes a fixed portion 133 and an abutting portion 134, the fixed portion 133 is fixedly connected with the valve body 11, and at least part of the static sealing section 131 is arranged on the fixed portion 133. The static sealing section 131 abuts against the wall portion corresponding to the valve cavity 111. The abutting portion 134 is close to the wall portion corresponding to the flow passage cavity relative to the fixed portion 133, and the dynamic sealing section 132 is arranged on the abutting portion 134. Along the radial direction of the valve device 100, the dynamic sealing section 132 is close to the core 121 relative to the static sealing section 131. In this way, the structure design of the sealing member 13 is relatively simple, and it is easier to make the dynamic sealing section 132 tightly adhere to the outer wall of the valve core 12 by the pressure of the working medium in the flow passage cavity, thereby achieving the sealing between the sealing member 13 and the valve core 12. For convenience of description: it is exemplarily given that, in the cross section perpendicular to the axis of the valve device 100, along the circumferential direction of the valve device 100, the abutting portion 134 is close to the wall portion corresponding to the flow passage cavity relative to the fixed portion 133, and the dynamic sealing section 132 is arranged on the abutting portion.

[0034] To make the abutting portion 134, it can be understood that the fluid contact section 139 on the side opposite to the dynamic sealing section 132 is sufficiently exposed to the flow passage cavity, and by means of the working medium in the flow passage cavity, the fluid contact section 139 can be understood to exert a certain force on the side opposite to the dynamic sealing section 132, so that the dynamic sealing section 132 is tightly attached to the outer side wall of the valve core 12. As an implementation, please refer to FIGS. 1 to 8, the wall portion corresponding to the hole 138 is formed on the abutting portion 134, the dynamic sealing section 132 is connected with the wall portion corresponding to the hole 138, and the flow-through cross-sectional area corresponding to the communication port 112 is larger than the flow-through cross-sectional area corresponding to the hole 138. It should be noted that the flow-through cross-sectional area here and in the following description refers to the cross section perpendicular to the flow direction of the working medium. In this way, the sealing element 13 can not need to be provided with an auxiliary structure to increase the force on the side opposite to the dynamic sealing section 132, and the force area of the fluid contact section 139 can be understood to be beneficial to improve the structural strength of the sealing element 13. As another implementation, the flow-through cross-sectional area corresponding to the communication port 112 is equal to the flow-through cross-sectional area corresponding to the hole 138. In this way, it is beneficial to reduce the flow resistance of the working medium in the flow passage cavity.

[0035] To increase the force area of the fluid contact section 139 on the side opposite to the dynamic sealing section 132, as an implementation, please refer to FIGS. 1 to 8, the sealing element 13 comprises a recess 135, the recess 135 is provided on the same side of the dynamic sealing section 132 as the static sealing section 131, the recess 135 is staggered with the static sealing section 131, and along the radial direction of the valve device 100, the wall portion corresponding to the recess 135 is spaced apart from the wall portion corresponding to the valve cavity 111 by a predetermined distance, and the flow passage cavity 14 is communicated with the recess cavity 1351 corresponding to the recess 135. For example, as shown in FIGS. 2 to 6, for the convenience of description, only the recess 135 is shown in the cross section perpendicular to the axis of the valve device 100, and the recess 135 is staggered with the static sealing section 131. The working medium in the flow passage cavity can enter the recess cavity 1351, and part of the wall portion corresponding to the recess cavity 1351 is located on the side opposite to the dynamic sealing section 132. In this way, first, it is beneficial to increase the force area of the fluid contact section on the side opposite to the dynamic sealing section 132, and further beneficial to increase the force on the abutting portion 134, so that the dynamic sealing section 132 is tightly attached to the valve core 12, and it is beneficial to improve the sealing between the dynamic sealing section 132 and the valve core 12.

[0036] Second, if the flow-through cross-sectional area corresponding to the communication port 112 is equal to the flow-through cross-sectional area corresponding to the hole 138, only an auxiliary structure, such as the recess 135, needs to be provided on the sealing element 13, which is beneficial to improve the sealing between the abutting portion 134 and the valve core 12 while reducing the flow resistance of the flow passage cavity 14 of the valve device 100.

[0037] Further, as an implementation, please refer to FIG. 1 to FIG. 9, the valve device 100 comprises a reinforcing portion 136, the wall portion corresponding to the concave cavity 1351 comprises a bottom portion 1352, the reinforcing portion 136 is protrudingly arranged from the bottom portion 1352 to the wall portion corresponding to the valve cavity 111, and the end portion of the reinforcing portion 136 is spaced apart from the wall portion corresponding to the valve cavity 111 by a preset interval. In this way, the structural strength of the sealing member 13 is improved, and the stress area on the side opposite to the dynamic sealing section 132 is increased. The wall portion corresponding to the hole 138 is formed in the abutting portion 134 and the reinforcing portion 136.

[0038] Further, as an implementation, the valve device 100 comprises a rib portion 13a, and at least part of the rib portion 13a is located in the reinforcing portion 136. In this way, the structural strength of the sealing member 13 is increased. Specifically, the rib portion 13a is a metal ring, and the sealing member 13 comprises an inner recess portion 13b, and at least part of the metal ring is embedded in the inner recess portion 13b. In this way, the structural strength of the sealing member 13 is increased.

[0039] The connection between the fixed portion 133 and the valve body 11 can be fixed by vulcanization, and of course, combined installation can also be used for connection and fixation. As an implementation, please refer to FIG. 1 to FIG. 9, the valve device 100 comprises a limiting portion 17, the limiting portion 17 is fixedly connected with the valve body 11 or the limiting portion 17 and the valve body 11 are integrated into a structure, the valve device 100 comprises a limiting groove 171, the wall portion corresponding to the limiting groove 171 comprises part of the wall portion corresponding to the valve cavity 111 and the limiting portion 17, the fixed portion 133 is located in the limiting groove 171, the static sealing section 131 is in contact with the wall portion corresponding to the valve cavity 111, and the side portion of the fixed portion 133 on the side away from the static sealing section 131 is in abutment with the limiting portion 17. In this way, the elastic deformation of the sealing member 13 can be used to realize the sealing between the sealing member 13 and the wall portion corresponding to the valve cavity 111.

[0040] As a specific implementation, part of the fixed portion 133 is in interference fit with the wall portion corresponding to the limiting groove 171, and it can be understood that part of the fixed portion 133 is elastically pressed against the wall portion corresponding to the limiting groove 171. The limiting portion 17 is spaced apart from the valve core 12 by a preset interval along the radial direction of the valve device 100. In this way, the friction between the valve core 12 and the limiting portion 17 is reduced, and the driving force of the valve core 12 is further reduced, which is conducive to reducing the structure of the driving assembly, for example, the output power of the motor can be reduced, and the manufacturing cost of the valve device 100 is reduced.

[0041] As an implementation, please refer to FIG. 1 to FIG. 9, the abutting portion 134 includes a connecting segment 1341, the connecting segment 1341 and the dynamic sealing segment 132 are arranged on the same side relative to the static sealing segment 131, and the connecting segment 1341 is away from the flow passage cavity 14 relative to the dynamic sealing segment 132. For example, as shown in FIG. 2 to FIG. 6, in a transverse cross section perpendicular to the axis of the valve device 100, the connecting segment 1341 is away from the flow passage cavity 14 relative to the dynamic sealing segment 132. In the radial direction of the valve device 100, the dynamic sealing segment 132 is closer to the valve core 12 relative to the connecting segment 1341, and the connecting segment 1341 is spaced apart from the valve core 12 by a predetermined distance in the radial direction of the valve device 100. In this way, the first is further conducive to reducing the driving force on the valve core 12, thereby facilitating the reduction of the structure of the driving assembly, for example, the output power of the motor can be reduced, thereby laying a certain foundation for the reduction of the valve device 100.

[0042] Second, it is conducive to reducing the friction area between the sealing member 13 and the valve core 12, while realizing the sealing between the sealing member 13 and the valve core 12, it is conducive to improving the service life of the sealing member 13.

[0043] The implementation of another embodiment will be introduced below:

[0044] As an implementation, please refer to FIG. 1, FIG. 10 to FIG. 13, in the radial direction of the valve device 100, the static sealing segment 131 is closer to the valve core 12 relative to the dynamic sealing segment 132, the fixed portion 133 is fixedly connected with the valve core 12 in the transverse cross section perpendicular to the axis of the valve device 100, the static sealing segment 131 is sealingly arranged with the valve core 12, and the dynamic sealing segment 132 abuts against the wall portion corresponding to the valve cavity 111. In this way, while realizing the sealing between the sealing member 13 and the valve body 11, it is conducive to simplifying the structure of the valve device 100. In this embodiment, the static sealing segment 131 is vulcanized and fixed with the outer wall of the valve core 12. In this way, it is conducive to simplifying the structure of the valve device 100, and auxiliary structures for installing and fixing the fixed portion 133 are not needed.

[0045] Under this embodiment, please refer to FIG. 1, FIG. 10 to FIG. 13, the flow area corresponding to the through port 1221 is greater than the flow area corresponding to the hole 138. In the state of the working medium in the flow passage cavity, the working medium passing through the through port 1221 can exert a certain force on the side away from the dynamic sealing segment 132, so that the dynamic sealing segment 132 is tightly attached to the wall portion corresponding to the valve body 11, thereby realizing the sealing between the wall portion corresponding to the valve cavity 111 and the sealing member.

[0046] Please refer to the drawings 1, 10 to 13, to improve the structural strength of the seal 13, the valve device 100 includes reinforcing part 137, reinforcing part 137 from the side away from the dynamic sealing segment 132 to the direction of the valve core 12 protruding setting. Specifically, the end of the reinforcing part 137 and the outer wall of the valve core 12 are preset at a distance, so that during the rotation of the valve core 12, it is beneficial to reduce the friction between the seal 13 and the valve core 12, thereby, it is beneficial to improve the service life of the seal 13.

[0047] The above-described embodiments only express several embodiments of the present application, which are described in detail and in detail, but cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications can be made, which are within the scope of the present application.

Claims

1. A valve device (100), characterized in that, The valve device (100) comprises a valve body (11) having at least part of a valve cavity (111), a valve core (12) and a sealing member (13) arranged in the valve cavity (111), the sealing member (13) comprising a static sealing section (131) and a dynamic sealing section (132), the static sealing section (131) being in static sealing connection with one of the valve body (11) and the valve core (12), and the dynamic sealing section (132) being in abutment with the other one of the valve body (11) and the valve core (12) during operation of the valve device (100); the valve device (100) comprises a flow channel cavity (14), and the sealing member (13) comprises a fluid contact section (139) arranged away from the dynamic sealing section (132), at least the fluid contact section (139) being exposed to the flow channel cavity (14).

2. Valve device (100) according to claim 1, characterized in that The sealing member (13) comprises a fixed portion (133) and an abutment portion (134), the fixed portion (133) being in fixed connection or elastic abutment with the valve body (11), at least part of the static sealing section (131) being arranged in the fixed portion (133), the static sealing section (131) being in abutment with a wall portion corresponding to the valve cavity (111), the abutment portion (134) being close to a wall portion corresponding to the flow channel cavity (14) relative to the fixed portion (133), the dynamic sealing section (132) being arranged in the abutment portion (134), and the dynamic sealing section (132) being close to the core body (121) relative to the static sealing section (131) along a radial direction of the valve device (100).

3. Valve device (100) according to claim 2, characterized in that The valve device (100) comprises a limiting portion (17) in fixed connection with the valve body (11) or being an integral structure with the valve body (11), and the valve device (100) comprises a limiting groove (171), a wall portion corresponding to the limiting groove (171) comprising part of a wall portion corresponding to the valve cavity (111) and the limiting portion (17), the fixed portion (133) being located in the limiting groove (171), the static sealing section (131) being in abutment with the wall portion corresponding to the valve cavity (111), and a side portion of the fixed portion (133) away from the static sealing section (131) being in abutment with the limiting portion (17).

4. Valve device (100) according to claim 3, characterized in that Part of the fixed portion (133) is elastically pressed against a wall portion corresponding to the limiting groove (171), and the limiting portion (17) is spaced apart from the valve core (12) by a preset distance along a radial direction of the valve device (100).

5. The valve device (100) according to claim 2, characterized in that The abutting portion (134) comprises a connecting section (1341), the connecting section (1341) and the dynamic sealing section (132) are arranged on the same side relative to the static sealing section (131), the connecting section (1341) is away from the flow passage cavity (14) relative to the dynamic sealing section (132) along the radial direction of the valve device (100), the dynamic sealing section (132) is close to the valve core (12) relative to the connecting section (1341) along the radial direction of the valve device (100), and the connecting section (1341) is spaced apart from the valve core (12) by a preset distance.

6. Valve device (100) according to claim 3, characterized in that The abutting portion (134) comprises a connecting section (1341), the connecting section (1341) and the dynamic sealing section (132) are arranged on the same side relative to the static sealing section (131), the connecting section (1341) is away from the flow passage cavity (14) relative to the dynamic sealing section (132) along the radial direction of the valve device (100), the dynamic sealing section (132) is close to the valve core (12) relative to the connecting section (1341) along the radial direction of the valve device (100), and the connecting section (1341) is spaced apart from the valve core (12) by a preset distance.

7. The valve device (100) according to claim 4, characterized in that The abutting portion (134) comprises a connecting section (1341), the connecting section (1341) and the dynamic sealing section (132) are arranged on the same side relative to the static sealing section (131), the connecting section (1341) is away from the flow passage cavity (14) relative to the dynamic sealing section (132) along the radial direction of the valve device (100), the dynamic sealing section (132) is close to the valve core (12) relative to the connecting section (1341) along the radial direction of the valve device (100), and the connecting section (1341) is spaced apart from the valve core (12) by a preset distance.

8. The valve device (100) according to claim 2, characterized in that The sealing element (13) comprises a recess (135), the recess (135) is arranged on the same side relative to the dynamic sealing section (132) of the static sealing section (131), the recess (135) is staggered with the static sealing section (131) along the radial direction of the valve device (100), the wall part corresponding to the recess (135) is spaced apart from the wall part corresponding to the valve cavity (111) by a preset distance, and the flow passage cavity (14) is in communication with the recess cavity (1351) corresponding to the recess (135).

9. Valve device (100) according to any one of claims 3 to 5, characterized in that The sealing element (13) comprises a recess (135), the recess (135) is arranged on the same side relative to the dynamic sealing section (132) of the static sealing section (131), the recess (135) is staggered with the static sealing section (131) along the radial direction of the valve device (100), the wall part corresponding to the recess (135) is spaced apart from the wall part corresponding to the valve cavity (111) by a preset distance, and the flow passage cavity (14) is in communication with the recess cavity (1351) corresponding to the recess (135).

10. Valve device (100) according to claim 8 or 9, characterized in that The valve device (100) comprises a reinforcing portion (136), a wall portion corresponding to the recess cavity (1351) comprises a bottom portion (1352), the reinforcing portion (136) is protrudingly arranged from the bottom portion (1352) to a wall portion corresponding to the valve cavity (111), and an end of the reinforcing portion (136) is spaced apart from the wall portion corresponding to the valve cavity (111) by a preset interval.

11. Valve device (100) according to claim 10, characterized in that The valve device (100) comprises a rib portion (13a), and at least part of the rib portion (13a) is located in the reinforcing portion (136).

12. The valve device (100) according to claim 2, characterized in that In the radial direction of the valve device (100), the static sealing section (131) is closer to the valve core (12) than the dynamic sealing section (132), the fixed portion (133) is fixedly connected with the valve core (12), the static sealing section (131) is sealingly arranged with the valve core (12), and the dynamic sealing section (132) abuts against the wall portion corresponding to the valve cavity (111).

13. Valve device (100) according to claim 12, characterized in that The static sealing section (131) is vulcanization-fixed with the outer wall of the valve core (12).

14. Valve device (100) according to claim 12 or 13, characterized in that The valve device (100) comprises a reinforcing portion (137), which is protrudingly arranged from a side (139) away from the dynamic sealing section (132) to the direction of the valve core (12).

15. A seal for sealing between a valve body (11) and a valve core (12), characterized in that: The valve body (11) has at least part of a valve cavity (111), the valve core (12) and the sealing member (13) are arranged in the valve cavity (111), the sealing member (13) comprises a static sealing section (131) and a dynamic sealing section (132), the static sealing section (131) is sealingly connected with one of the valve body (11) and the valve core (111), and the dynamic sealing section (132) abuts against the other one of the valve body (11) and the valve core (12) during the operation of the valve device (100); the valve device (100) comprises a flow channel cavity (14), the dynamic sealing section (132) is closer to a wall portion corresponding to the flow channel cavity (14) than the static sealing section (131), and the sealing member (13) comprises a fluid contact section (139), which is arranged away from the dynamic sealing section (132), and at least the fluid contact section (139) is exposed to the flow channel cavity (14).

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