Sealing device
By adopting the design of circumferential distribution of seals and pressing parts in the sealing device, the problems of large contact area, large friction and high cost between the sealing parts to be sealed are solved, and the effect of reducing friction, torque and cost is achieved.
Patent Information
- Application Number
- CN202421842122.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-31
AI Technical Summary
In the existing sealing device, the contact area between the sealing member and the sealing member to be sealed is large, the friction is large, the cost is high, and the manufacturing difficulty is high.
The seal and the pressing member are distributed in the circumference of the seal to be sealed together to press the seal to reduce the contact area, reduce friction and reduce the size of the seal.
By reducing the contact area between the seal and the seal to be sealed, the friction and torque are reduced, while reducing the size and cost of the seal, improving the sealing effect.
Smart Images
Figure CN223136918U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mechanical seals, and particularly to a sealing device. Background Art
[0002] A sealing device is a component that prevents fluid or solid particles from leaking between adjacent mating surfaces, or prevents external impurities such as dust and moisture from entering the interior of machinery and equipment, and is widely used in fields such as petrochemical, machinery, power generation, metallurgy, and automobiles.
[0003] Currently, the sealing devices on the market usually seal the entire side of the component to be sealed. The contact area between the sealing member and the component to be sealed is large, resulting in large friction, high cost of the sealing member, and difficult manufacturing. Summary of the Utility Model
[0004] This application provides a sealing device that can reduce friction and cost.
[0005] This application provides a sealing device, including:
[0006] A component to be sealed;
[0007] A sealing member, disposed in the sealing area of the component to be sealed, in sealing contact with the component to be sealed, for sealing the sealing area; and
[0008] A pressing member, pressing against the component to be sealed, distributed circumferentially on the component to be sealed with the sealing member, and the sealing member and the pressing member jointly press the component to be sealed.
[0009] In some embodiments, the sealing member seals the sealing area of the component to be sealed, and the pressing member and the sealing member are distributed circumferentially on the component to be sealed and jointly press the component to be sealed, which can reduce the contact area between the sealing member and the component to be sealed, reduce friction, reduce torque, and at the same time can reduce the size of the sealing member and reduce cost.
[0010] Optionally, the sealing device includes a plurality of pressing members, the plurality of pressing members pressing against the component to be sealed, distributed circumferentially on the component to be sealed, and pressing the component to be sealed from multiple directions. In some embodiments, the plurality of pressing members pressing the component to be sealed from multiple directions has a better sealing effect.
[0011] Optionally, the sealing member and the plurality of pressing members are arranged circumferentially on the cross-section of the component to be sealed;
[0012] At least one of the plurality of pressing members is opposite to the sealing member radially on the cross-section of the component to be sealed. In some embodiments, at least one pressing member is opposite to the sealing member radially on the cross-section of the component to be sealed and acts radially with the sealing member, resulting in a better sealing effect.
[0013] Optionally, the plurality of pressing members are located on one side of the central axis of the cross section of the member to be sealed, and the sealing member is located on the other side of the central axis of the cross section. In some embodiments, the pressing members and the sealing member are arranged opposite to each other, which can improve the sealing effect while reducing the contact area between the sealing member and the member to be sealed.
[0014] Optionally, the plurality of pressing members are opposite to the sealing member in the radial direction of the cross section of the member to be sealed, and the plurality of pressing members are evenly arranged in the circumferential direction of the cross section of the member to be sealed. In some embodiments, the plurality of pressing members are evenly arranged and arranged opposite to the sealing member, so that the sealing in all directions can be more uniform and the sealing effect can be improved.
[0015] Optionally, the sealing device comprises a shell. The shell wraps the part to be sealed, and the sealing member and the pressing member are clamped between the shell and the part to be sealed. In some embodiments, the shell can fix the sealing member and the pressing member to better perform the sealing function.
[0016] Optionally, the housing includes a groove that is recessed outward from the inner surface of the housing. The pressing member is clamped in the groove and squeezed between the groove and the outer side of the member to be sealed. In some embodiments, the groove can fix the pressing member, and the pressing member is squeezed between the groove and the outer side of the member to be sealed, so that the sealing effect is better.
[0017] Optionally, the side of the pressing member facing the member to be sealed exceeds the groove and abuts against the member to be sealed. In some embodiments, the side of the pressing member facing the member to be sealed exceeds the groove, the groove may not contact the member to be sealed, and the pressing member abuts against the member to be sealed and can be pressed more tightly.
[0018] Optionally, the housing includes a limiting groove that is recessed outward from the inner surface of the housing and a limiting protrusion that is convexly arranged in the limiting groove, and the sealing member is located in the limiting groove at the upper limit of the circumference of the housing, and includes a matching groove that is limitedly matched with the limiting protrusion. In some embodiments, the limiting groove can limit the movement of the sealing member, so that the sealing effect is better.
[0019] Optionally, the outer side surface of the seal is provided with a plurality of convex ribs, the plurality of convex ribs are spaced apart in the circumferential direction of the seal and abut against the inner surface of the limiting groove. In some embodiments, the convex ribs can prevent the seal from deflecting when subjected to force, further improving the sealing effect.
[0020] Optionally, the groove includes a first limit surface and a second limit surface opposite to each other in the circumferential direction, and a connecting surface connecting the first limit surface and the second limit surface, the connecting surface extends along the circumference of the outer shell, and the limit protrusion is protruded from the connecting surface and is located between the first limit surface and the second limit surface.
[0021] Optionally, the plurality of ribs are located between the first limiting surface and the limiting protrusion, and between the second limiting surface and the limiting protrusion, and the plurality of ribs abut against the connecting surface.
[0022] Optionally, the plurality of ribs include a first group of ribs and a second group of ribs. The first group of ribs and the second group of ribs are located between the limiting protrusion and the first limiting surface, and the first group of ribs are closer to the first limiting surface relative to the limiting protrusion. In some embodiments, the plurality of ribs are arranged close to the limiting surface and the limiting protrusion, so that the sealing effect is better.
[0023] Optionally, the pressing member extends along the length direction of the member to be sealed, and the length of the pressing member is greater than, less than or equal to the length of the member to be sealed.
[0024] Optionally, the pressing member is made of polytetrafluoroethylene.
[0025] Optionally, the sealing member is made of rubber or rubber plus polytetrafluoroethylene.
[0026] Optionally, the member to be sealed is cylindrical, the member to be sealed is movable relative to the housing, the sealing member and the pressing member are fixed to the housing, and the side of the pressing member close to the member to be sealed is arc-shaped.
[0027] Optionally, the sealing device includes a valve assembly, the member to be sealed is the valve core of the valve assembly, and the housing is the housing of the valve assembly.
[0028] In some embodiments, the thickness of the pressing member can be adjusted so that the pressing force can be adjusted. In some embodiments, polytetrafluoroethylene has a low coefficient of friction, which can reduce the frictional force. In some embodiments, a specific rubber is elastic and acid- and alkali-resistant, which can play a good sealing role. In some embodiments, the side of the pressing member close to the member to be sealed is arc-shaped, so that the cylindrical member to be sealed rotates more smoothly during rotation, avoiding excessive peak torque.
[0029] Optionally, the pressing member is fixedly connected to the housing. In some embodiments, the pressing member is fixedly connected to the housing, and the pressing member can be a separately manufactured pressing member, and the selection range is larger.
[0030] Optionally, the pressing member and the housing are integrally formed. In some embodiments, integrally forming the pressing member and the housing can eliminate the assembly process.
[0031] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Description of the Drawings
[0032] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.
[0033] Figure 1 Shown is a transverse sectional view of an embodiment of the sealing device of this application.
[0034] Figure 2 Shown is another transverse sectional view of an embodiment of the sealing device of this application.
[0035] Figure 3 Shown is Figure 1 A schematic structural view of an embodiment of the pressing member of the sealing device shown.
[0036] Figure 4 Shown is Figure 3 A transverse sectional view of the pressing member shown. Detailed implementation manners
[0037] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.
[0038] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The "first", "second" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "an" do not indicate a quantity limitation, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, the similar terms such as "front part", "rear part", "lower part" and / or "upper part" are only for convenience of description and are not limited to one position or a spatial orientation. The terms such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The terms such as "connect" or "be connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.
[0039] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0040] The sealing device of the embodiment of the present application includes a sealing member to be sealed, a sealing member and a pressing member. The sealing member is arranged in the sealing area of the member to be sealed, and is in sealing contact with the member to be sealed, and is used to seal the said sealing area. The pressing member presses against the member to be sealed, and is distributed with the sealing member in the circumferential direction of the member to be sealed, and the sealing member and the pressing member jointly press the member to be sealed. The pressing member and the sealing member are distributed in the circumferential direction of the member to be sealed, and jointly press the member to be sealed, which can reduce the contact area between the sealing member and the member to be sealed, reduce friction, reduce torque, and at the same time reduce the size of the sealing member and reduce costs.
[0041] The present application provides a sealing device. The sealing device of the present application is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.
[0042] Figure 1 FIG. 1 is a cross-sectional view of an embodiment of the sealing device 100 of the present application. Figure 1 As shown, the sealing device 100 includes a sealed member 101, a sealing member 102 and a pressing member 103. In the present embodiment, the sealed member 101 is a cylindrical valve core. The sealed member 101 includes a sealed area, which needs to be sealed to prevent fluid from leaking from adjacent joint surfaces. The sealing member 102 is arranged in the sealed area of the sealed member 101, and is in sealing contact with the sealed member 101, and is used to seal the sealed area. In the present embodiment, the sealing member 102 is a sheet with a certain thickness. The sealing member 102 seals the sealed area of the sealed member 101, reduces the contact area between the sealing member 102 and the sealed member 101, reduces friction, reduces torque, and can reduce the size of the sealing member 102, thereby reducing manufacturing costs. The pressing member 103 presses against the sealed member 101, and is distributed with the sealing member 102 in the circumferential direction of the sealed member 101, and the sealing member 102 and the pressing member 103 jointly press the sealed member 101. In some embodiments, the pressing member 103 presses against the sealed member 101 to ensure that the sealed member 101 is tightly fitted with the sealing member 102, thereby improving the sealing effect. The pressing member 103 and the sealing member 102 jointly press the sealed member 101, thereby improving the sealing effect.
[0043] The sealing device 100 includes a plurality of pressing members 103. The plurality of pressing members 103 press against the member to be sealed 101, are distributed in the circumferential direction of the member to be sealed 101, and press against the member to be sealed 101 from multiple directions. In this embodiment, the pressing member 103 is strip-shaped, which can reduce the contact area with the member to be sealed 101. The plurality of pressing members 103 are spaced apart in the circumferential direction of the member to be sealed 101, and can press the member to be sealed 101 from multiple directions. In some embodiments, the plurality of pressing members 103 make the sealing effect better. The seal 102 and the plurality of pressing members 103 are arranged in the circumferential direction of the cross-section of the member to be sealed 101. In some embodiments, at least one of the plurality of pressing members 103 is opposite to the seal 102 in the radial direction of the cross-section of the member to be sealed 101. At least one pressing member 103 is disposed opposite to the seal 102 and presses the member to be sealed 101 in the direction of the seal 102. In other embodiments, the plurality of pressing members 103 are located on one side of the central axis of the cross-section of the member to be sealed 101, and the seal 102 is located on the other side of the central axis of the cross-section. The pressing member 103 and the seal 102 are respectively located on both sides of the central axis of the member to be sealed 101, so that the plurality of pressing members 103 press the member to be sealed 101 from multiple directions towards the seal 102. In some embodiments, the pressing member 103 and the seal 102 are disposed opposite to each other, which can improve the sealing effect while reducing the contact area between the seal 102 and the member to be sealed 101. In some embodiments, the plurality of pressing members 103 are opposite to the seal 102 in the radial direction of the cross-section of the member to be sealed 101, and the plurality of pressing members 103 are evenly arranged in the circumferential direction of the cross-section of the member to be sealed 101. In this way, the sealing in all directions can be more uniform, improving the sealing effect.
[0044] Figure 2 Shown is another transverse sectional view of an embodiment of the sealing device 100 of the present application. As Figure 2 shown, the sealing device 100 includes a housing 104. The housing 104 wraps the member to be sealed 101. The seal 102 and the pressing member 103 are clamped between the housing 104 and the member to be sealed 101. In some embodiments, the housing 104 can fix the seal 102 and the pressing member 103 to make them play a better sealing role.
[0045] In some embodiments, the pressing member 103 is fixedly connected to the housing 104. In this way, the pressing member 103 can be a separately manufactured pressing member, and the selection range is larger.
[0046] In other embodiments, the pressing member 103 is integrally formed with the housing 104. In this way, the pressing member 103 and the housing 104 can be integrally manufactured, and the assembly process can be omitted.
[0047] The housing 104 includes a groove 105 that is recessed outward from the inner surface of the housing 104. The pressing member 103 is clamped within the groove 105 and is squeezed between the groove 105 and the outer side surface of the member to be sealed 101. In some embodiments, the groove 105 can fix the pressing member 103. When the member to be sealed 101 rotates, the groove 105 can prevent the pressing member 103 from moving, so that the pressing member 103 can press the member to be sealed 101 to ensure the sealing performance. The pressing member 103 is squeezed between the groove 105 and the outer side surface of the member to be sealed 101, resulting in a better sealing effect. The side of the pressing member 103 facing the member to be sealed 101 extends beyond the groove 105 and abuts against the member to be sealed 101. In some embodiments, the side of the pressing member 103 facing the member to be sealed 101 extends beyond the groove 105. The groove 105 may not contact the member to be sealed 101, and the pressing member 103 abuts against the member to be sealed 101, enabling a tighter pressing force.
[0048] The housing 104 includes a limiting groove 106 that is recessed outward from the inner surface of the housing 104 and a limiting protrusion 107 protruding within the limiting groove 106. The seal 102 is circumferentially limited within the limiting groove 106 of the housing 104 and includes a mating groove 108 that mates with the limiting protrusion 107. The limiting groove 106 can limit the position of the seal 102 and prevent it from moving. In this embodiment, the limiting protrusions 107 are evenly spaced on the inner surface of the limiting groove 106, and the limiting protrusions 107 and the mating grooves 108 jointly limit the seal 102. In some embodiments, the limiting groove 106, the limiting protrusion 107, and the mating groove 108 can limit the seal 102, resulting in a better sealing effect.
[0049] Reference Figure 1 - Figure 2, the outer side surface of the seal 102 is convexly provided with a plurality of ribs 109. The plurality of ribs 109 are spaced apart in the circumferential direction of the seal 102 and abut against the inner surface of the limiting groove 106. The plurality of ribs 109 are elastic and abut against the inner surface of the limiting groove 106, so as to better limit the seal 102. The groove 105 includes a first limiting surface 110 and a second limiting surface 111 that are opposite in the circumferential direction, and a connecting surface 112 that connects the first limiting surface 110 and the second limiting surface 111. The first limiting surface 110 and the second limiting surface 111 play a limiting role, and the connecting surface 112 connects the first limiting surface 110 and the second limiting surface 111. The connecting surface 112 extends along the circumferential direction of the housing 104, and the limiting protrusion 107 is convexly provided on the connecting surface 112 and is located between the first limiting surface 110 and the second limiting surface 111. The limiting protrusions 107 are convexly provided on the connecting surface 112 at intervals and jointly limit the seal 102 with the first limiting surface 110 and the second limiting surface 111. The plurality of ribs 109 are located between the first limiting surface 110 and the limiting protrusion 107 and between the second limiting surface 111 and the limiting protrusion 107, and the plurality of ribs 109 abut against the connecting surface 112. The plurality of ribs 109 cooperate with the limiting protrusions 107 to limit the seal 102 between the first limiting surface 110 and the second limiting surface 111. In some embodiments, the plurality of ribs 109 include a first group of ribs 1091 and a second group of ribs 1092. The first group of ribs 1091 and the second group of ribs 1092 are located between the limiting protrusion 107 and the first limiting surface 110, and the first group of ribs 1091 are closer to the first limiting surface 110 relative to the limiting protrusion 107. The first group of ribs 1091 are arranged close to the first limiting surface 110, and the second group of ribs are arranged close to the limiting protrusion 107. In this embodiment, the plurality of ribs 109 further include a third group of ribs 1093 and a fourth group of ribs 1094. The third group of ribs 1093 are close to the limiting protrusion 107, and the fourth group of ribs 1094 are close to the second limiting surface 111. In some embodiments, the plurality of ribs 109 are arranged close to the first limiting surface 110, the second limiting surface 111 and the limiting protrusion 107, so as to achieve a better sealing effect.
[0050] When the seal 101 is cylindrical, the seal 101 can move relative to the housing 104, and the seal 102 and the pressing member 103 are fixed to the housing 104. When the seal 101 rotates, a frictional force is generated between the seal 101 and the seal 102 and the pressing member 103. In this embodiment, the sealing device 100 includes a valve assembly. The seal 101 is the valve core of the valve assembly, and the housing 104 is the housing of the valve assembly. In some embodiments, the material of the pressing member 103 is polytetrafluoroethylene. Polytetrafluoroethylene has a low coefficient of friction and can reduce the frictional force. In some embodiments, the material of the seal 102 is rubber or rubber plus polytetrafluoroethylene. Rubber or rubber plus polytetrafluoroethylene is elastic and acid and alkali resistant, and can play a good sealing role.
[0051] Figure 3 As shown Figure 1 The structural schematic diagram of an embodiment of the pressing member 103 of the sealing device 100 shown. The pressing member 103 is strip-shaped. The pressing member 103 extends along the length direction of the member to be sealed 101, and the length of the pressing member 103 is greater than, less than or equal to the length of the member to be sealed 101. In some embodiments, the thickness of the pressing member 103 can be adjusted so that the pressing force can be adjusted. Figure 4 As shown Figure 3 The transverse sectional view of the pressing member 103 shown. The side of the pressing member 103 close to the member to be sealed 101 is arc-shaped. The edges 113 and 114 are arc-shaped, and the edges 115 and 116 are straight lines. One side of the edges 113, 114 and 115 is close to the member to be sealed 101. One side of the edge 116 is close to the groove 105. The side of the pressing member 103 close to the member to be sealed 101 is arc-shaped, so that the member to be sealed rotates more smoothly, the pressing member 103 can better press against the cylindrical member to be sealed 101, and the sealing effect is better.
[0052] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only illustrative, and the true scope and spirit of the present application are pointed out by the following claims.
[0053] It should be understood that the present application is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.
Claims
1. A sealing device, characterized in that, Comprising: A component to be sealed (101); A seal (102), disposed in the area to be sealed of the component to be sealed (101), in sealing abutment with the component to be sealed (101), for sealing the area to be sealed; And A pressing member (103), pressing against the component to be sealed (101), distributed in the circumferential direction of the component to be sealed (101) with the seal (102), the seal (102) and the pressing member (103) jointly pressing the component to be sealed (101).
2. The sealing device according to claim 1, characterized in that, The sealing device (100) includes a plurality of pressing members (103), the plurality of pressing members (103) pressing against the component to be sealed (101), distributed in the circumferential direction of the component to be sealed (101), pressing the component to be sealed (101) from multiple directions.
3. The sealing device according to claim 2, characterized in that, The seal (102) and the plurality of pressing members (103) are arranged in the circumferential direction of the cross-section of the component to be sealed (101); At least one of the plurality of pressing members (103) is opposite to the seal (102) in the radial direction of the cross-section of the component to be sealed (101); and / or The plurality of pressing members (103) are located on one side of the central axis of the cross-section of the component to be sealed (101), and the seal (102) is located on the other side of the central axis of the cross-section.
4. The sealing device according to claim 3, characterized in that, The plurality of pressing members (103) are opposite to the seal (102) in the radial direction of the cross-section of the component to be sealed (101), and the plurality of pressing members (103) are evenly arranged in the circumferential direction of the cross-section of the component to be sealed (101).
5. The sealing device according to claim 1, characterized in that, The sealing device (100) includes a housing (104); the housing (104) encloses the component to be sealed (101), and the seal (102) and the pressing member (103) are clamped between the housing (104) and the component to be sealed (101).
6. The sealing device according to claim 5, characterized in that, The housing (104) includes a groove (105) recessed outward from the inner surface of the housing (104); the pressing member (103) is clamped in the groove (105), and is pressed between the groove (105) and the outer side surface of the component to be sealed (101).
7. The sealing device according to claim 6, characterized in that, The side of the pressing member (103) facing the component to be sealed (101) extends beyond the groove (105), and abuts against the component to be sealed (101).
8. The sealing device according to claim 6, wherein The housing (104) includes a limiting groove (106) recessed outward from the inner surface of the housing (104) and a limiting protrusion (107) protruding in the limiting groove (106), the seal (102) is circumferentially limited in the limiting groove (106) of the housing (104), and includes a mating groove (108) for matingly limiting with the limiting protrusion (107).
9. The sealing device according to claim 8, characterized in that, A plurality of ribs (109) protrude from the outer side surface of the seal (102), the plurality of ribs (109) are spaced apart in the circumferential direction of the seal (102), and abut against the inner surface of the limiting groove (106).
10. The sealing device according to claim 9, characterized in that, The groove (105) includes a first limiting surface (110) and a second limiting surface (111) that are circumferentially opposite, and a connecting surface (112) connecting the first limiting surface (110) and the second limiting surface (111). The connecting surface (112) extends along the circumference of the housing (104). The limiting protrusion (107) protrudes from the connecting surface (112) and is located between the first limiting surface (110) and the second limiting surface (111). The multiple ribbed protrusions (109) are located between the first limiting surface (110) and the limiting protrusion (107), and between the second limiting surface (111) and the limiting protrusion (107). The multiple ribbed protrusions (109) abut against the connecting surface (112); and / or The multiple ribbed protrusions (109) include a first group of ribbed protrusions (1091) and a second group of ribbed protrusions (1092). The first group of ribbed protrusions (1091) and the second group of ribbed protrusions (1092) are located between the limiting protrusion (107) and the first limiting surface (110). The first group of ribbed protrusions (1091) is closer to the first limiting surface (110) relative to the limiting protrusion (107).
11. The sealing device according to claim 5, characterized in that, The pressing member (103) extends along the length direction of the member to be sealed (101). The length of the pressing member (103) is greater than, less than, or equal to the length of the member to be sealed (101); and / or The material of the pressing member (103) is polytetrafluoroethylene; and / or The material of the sealing member (102) is rubber or rubber plus polytetrafluoroethylene; and / or The member to be sealed (101) is cylindrical. The member to be sealed (101) can move relative to the housing (104). The sealing member (102) and the pressing member (103) are fixed to the housing (104). The side of the pressing member (103) close to the member to be sealed (101) is arc-shaped; and / or The sealing device includes a valve assembly. The member to be sealed (101) is the valve core of the valve assembly, and the housing (104) is the housing of the valve assembly.
12. The sealing device according to claim 5, characterized in that, The pressing member (103) is fixedly connected to the housing (104); or The pressing member (103) is integrally formed with the housing (104).