Elastic sealing device

Abstract

The application provides an elastic sealing device, relates to the technical field of sealing, and aims to solve the technical problem that spring energy storage sealing rings have failure risks at extremely high and low temperatures. The elastic sealing device comprises a flexible sealing sleeve and a deformation assembly. The flexible sealing sleeve is annular, and comprises a body. The body is provided with a receiving groove, and a first sealing edge and a second sealing edge are formed on both sides of the body. The deformation assembly comprises at least a first elastic member and a second elastic member that are stacked together. The first elastic member and the second elastic member have different thermal expansion coefficients. The deformation assembly is arranged on the body and at least contacts part of the first sealing edge and part of the second sealing edge. The deformation assembly is configured to provide a tension or a contraction force to the body, so as to adjust the sealing force between the first sealing edge, the second sealing edge and a sealed body. The application provides the elastic sealing device for sealing a rotating shaft and a sealing seat.

Description

Technical Field

[0001] This application relates to the field of sealing technology, and in particular to an elastic sealing device. Background Technology

[0002] Spring-storage seals are a high-performance elastic sealing structure with broad application prospects in ultra-high temperature, ultra-low temperature, corrosive media, and ultra-high pressure conditions.

[0003] The spring-loaded sealing ring mainly consists of an open flexible sealing sleeve and a circumferential spring installed inside the opening. The flexible sealing sleeve is made of polytetrafluoroethylene (PTFE), a temperature-sensitive material. At high temperatures, the flexible sealing sleeve softens significantly, resulting in a substantial decrease in stiffness and consequently a significant reduction in sealing force. Conversely, at low temperatures, it hardens significantly, increasing stiffness and enhancing sealing force, but this also leads to severe wear of the flexible sealing sleeve.

[0004] Therefore, when using the above-mentioned spring energy storage seal ring for sealing, its sealing performance is greatly affected by temperature. Under extreme high and low temperatures, the spring energy storage seal ring is at risk of failure, which limits its application in a wide range of high and low temperature conditions. Summary of the Invention

[0005] In view of the above problems, this application provides an elastic sealing device that can reduce the risk of sealing failure of the flexible sealing sleeve under extreme high and low temperatures, and improve the application range of the spring energy storage sealing ring under a wide range of high and low temperature conditions.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] This application provides an elastic sealing device including a flexible sealing sleeve and a deformable component; the flexible sealing sleeve includes an annular body, the body having a receiving groove along its circumference, and a first sealing edge and a second sealing edge formed on both sides of the body; the deformable component is disposed on the body, the deformable component is in contact with at least a portion of the first sealing edge and a portion of the second sealing edge, and the deformable component is configured to provide tension or contraction force to the body to adjust the sealing force between the first sealing edge, the second sealing edge and the sealed body.

[0008] In an optional embodiment, the body further includes a root portion; the first sealing edge and the second sealing edge are respectively disposed on both sides of the root portion and form the receiving groove; the deformable component contacts at least a portion of the first sealing edge and a portion of the second sealing edge.

[0009] In one optional embodiment, the deformable component is disposed within the receiving groove; the coefficient of thermal expansion of the first elastic element is less than that of the second elastic element; the first elastic element is disposed on the side of the second elastic element facing the body and is in contact with the inner wall of the receiving groove.

[0010] In one alternative embodiment, the projection of the second elastic element onto the first elastic element coincides with the first elastic element.

[0011] In one alternative embodiment, a portion of the first elastic element is abutted against the first sealing edge; a portion of the first elastic element is abutted against the second sealing edge; and a portion of the first elastic element is abutted against the root portion.

[0012] In one alternative embodiment, the first elastic member and the second elastic member are both configured as an integral structure; the first elastic member is U-shaped and covers the entire root portion.

[0013] In an alternative embodiment, the first elastic element covers the entire wall of the receiving groove.

[0014] In an optional embodiment, the first elastic member and the second elastic member are respectively configured as separate structures; the first elastic member includes two L-shaped structures, and the two L-shaped structures are respectively arranged on both sides of the root; each L-shaped structure includes a first part and a second part, wherein the first part covers the surface of the root; the second part covers the surface of the first sealing edge, or covers the surface of the second sealing edge.

[0015] In one optional embodiment, the deformable component is disposed at the opening of the receiving groove; the first elastic member covers the opening of the receiving groove, and a portion of the first elastic member is in contact with the first sealing edge, and a portion of the first elastic member is in contact with the second sealing edge.

[0016] In one optional embodiment, the elastic sealing device further includes a circumferential spring disposed within the receiving groove and in contact with the second elastic member; the first elastic member is located on the side of the second elastic member opposite to the circumferential spring.

[0017] Compared with related technologies, the elastic sealing device provided in this application has the following advantages:

[0018] The elastic sealing device provided in this application embodiment has a flexible sealing sleeve with a deformable component. The deformable component is in contact with at least a portion of the first sealing edge and a portion of the second sealing edge. The deformable component includes at least a first elastic element and a second elastic element stacked together. The first elastic element and the second elastic element have different coefficients of thermal expansion. When there is a difference in the amount of deformation between the two, the deformable component will deform, thereby changing the sealing force between the first sealing edge, the second sealing edge and the sealed body.

[0019] When the flexible sealing sleeve is in a high-temperature environment, the different deformation amounts of the first and second elastic elements cause the deformable assembly to expand, thereby increasing the sealing force between the first and second sealing edges and the sealed body. Conversely, when the flexible sealing sleeve is in a low-temperature environment, the different deformation amounts of the first and second elastic elements cause the deformable assembly to contract, thereby reducing the sealing force between the first and second sealing edges and the sealed body.

[0020] In related technologies, the flexible sealing sleeve of the spring energy storage seal ring softens significantly at high temperatures, resulting in a substantial decrease in material stiffness and a significant reduction in sealing force. Conversely, it hardens significantly at low temperatures, leading to a substantial increase in stiffness and a significant increase in sealing force, but this results in severe wear of the flexible sealing sleeve. Therefore, the spring energy storage seal ring is at risk of failure under extreme high and low temperatures.

[0021] However, the elastic sealing device provided in this application embodiment has a deformation component inside the flexible sealing sleeve. The deformation component can adaptively adjust its deformation with temperature changes, thereby adjusting the sealing force between the flexible sealing sleeve and the sealed body, so that the sealing ability of the flexible sealing sleeve remains stable. This can reduce the risk of sealing failure of the flexible sealing sleeve in extreme high and low temperature environments and improve the application range of the spring energy storage sealing ring in a wide range of high and low temperature conditions.

[0022] In addition to the technical problems solved by the embodiments of this disclosure, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that the elastic sealing device provided by the embodiments of this disclosure can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic cross-sectional view of the assembly of the elastic sealing device and the sealed body provided in the embodiments of this application. Figure 1 ;

[0025] Figure 2 A cross-sectional schematic diagram of the assembly of the deformable component and the flexible sealing sleeve provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the arrangement of the circumferential spring in the receiving groove provided in the embodiments of this application;

[0027] Figure 4 Schematic diagram of the arrangement of the deformable components in the receiving groove according to the embodiments of this application. Figure 1 ;

[0028] Figure 5 Schematic diagram of the arrangement of the deformable components in the receiving groove according to the embodiments of this application. Figure 2 ;

[0029] Figure 6 Schematic diagram of the arrangement of the deformable components in the receiving groove according to the embodiments of this application. Figure 3 .

[0030] Explanation of reference numerals in the attached figures:

[0031] 100 - Elastic sealing device;

[0032] 10 - Flexible sealing sleeve;

[0033] 11-Body; 111-First sealing edge; 112-Second sealing edge; 113-Root; 12-Receiving groove;

[0034] 20 - Deformable components;

[0035] 21-First elastic element; 22-Second elastic element;

[0036] 30-Circumferential spring;

[0037] 200 - Rotating shaft;

[0038] 300-Sealing seat;

[0039] 310 - Mounting cavity. Detailed Implementation

[0040] In related technologies, the sealing performance of spring-loaded sealing rings is significantly affected by temperature. Under extreme high and low temperatures, these rings are at risk of failure. The inventors discovered that this problem arises because the flexible sealing sleeve of the spring-loaded sealing ring is made of temperature-sensitive PTFE material. This flexible sleeve softens significantly at high temperatures, resulting in a substantial decrease in stiffness and consequently a significant reduction in sealing force; conversely, it hardens significantly at low temperatures, leading to a substantial increase in stiffness and a significant improvement in sealing force.

[0041] However, both excessively high and low sealing forces can lead to significant sealing problems. For example, excessive sealing force results in excessive friction and significantly increased wear, while insufficient sealing force leads to inadequate sealing capacity and increased leakage rate. Therefore, the sealing performance of spring-energy accumulator seals in related technologies is greatly affected by temperature, and they are at risk of failure under extreme high and low temperatures.

[0042] To address the aforementioned technical problems, this application provides an elastic sealing device, including a flexible sealing sleeve and a deformable component. The flexible sealing sleeve includes a receiving groove and a first sealing edge and a second sealing edge located on both sides thereon. The deformable component is in contact with at least a portion of the first sealing edge and a portion of the second sealing edge.

[0043] Furthermore, the deformable assembly includes a first elastic element and a second elastic element stacked together, and the first elastic element and the second elastic element have different coefficients of thermal expansion. When there is a difference in the amount of deformation between the two, the deformable assembly will deform to adjust the sealing force between the first sealing edge, the second sealing edge and the sealed body.

[0044] With this configuration, the deformable component in this embodiment can adaptively deform with temperature changes, thereby adjusting the sealing force between the flexible sealing sleeve and the sealed body, so as to keep the sealing capacity of the flexible sealing sleeve stable, reduce the risk of sealing failure of the flexible sealing sleeve under extreme high and low temperatures, and improve the application range of the spring energy storage sealing ring under a wide range of high and low temperature conditions.

[0045] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0046] like Figure 1 and Figure 2As shown, the elastic sealing device 100 provided in this embodiment can seal a sealed body, which can be a rotating shaft 200 and a sealing seat 300. The elastic sealing device 100 can be sleeved on the rotating shaft 200, and the elastic sealing device 100 contacts the surfaces of the rotating shaft 200 and the sealing seat 300 respectively to form a sealing structure, that is, the elastic sealing device 100 can seal the rotating shaft 200 and the sealing seat 300.

[0047] The elastic sealing device 100 includes a flexible sealing sleeve 10 and a deformable component 20. The sealing seat 300 is annular and sleeved on the rotating shaft 200. The sealing seat 300 has a mounting cavity 310, in which the flexible sealing sleeve 10 is embedded. One side of the flexible sealing sleeve contacts and seals the inner wall of the mounting cavity 310. The other side of the flexible sealing sleeve 10 contacts the outer peripheral surface of the rotating shaft 200, forming a sealing surface.

[0048] The flexible sealing sleeve 10 is sleeved on the outside of the rotating shaft 200. The flexible sealing sleeve 10 includes an annular body 11, which is embedded in the mounting cavity 310. The body 11 is provided with an open receiving groove 12 along its circumference. The cross-sectional shape of the receiving groove 12 can be U-shaped or trapezoidal, etc., and a first sealing edge 111 and a second sealing edge 112 are formed on both sides of the receiving groove 12.

[0049] For example, along the first direction (the upper and lower directions in the figure), the opening of the receiving groove 12 is located at the top of the body 11, and along the second direction (the left and right directions in the figure), the body 11 has a first sealing edge 111 and a second sealing edge 112, the first sealing edge 111 and the second sealing edge 112 being configured as the groove wall of the receiving groove 12.

[0050] For ease of description of the embodiments of this application, the first sealing edge 111 is defined as contacting the rotating shaft 200 and forming a sealing structure; the second sealing edge 112 contacts the side wall of the mounting cavity 310 and forms a sealing structure, that is, the sealing between the rotating shaft 200 and the sealing seat 300 can be achieved by the flexible sealing sleeve 10.

[0051] The deformable component 20 provided in this application embodiment includes at least a first elastic element 21 and a second elastic element 22, and the first elastic element 21 and the second elastic element 22 have different coefficients of thermal expansion and are stacked together. For example, the deformable component 20 includes a first elastic element 21 and a second elastic element 22 that are attached and connected together. Since the first elastic element 21 and the second elastic element 22 have different coefficients of thermal expansion, when the temperature of the deformable component 20 changes, the deformation amount of the first elastic element 21 and the second elastic element 22 is different. Therefore, the deformable component 20 can expand or contract.

[0052] It should be noted that the elastic element provided in this application embodiment can be a metal sheet with a different coefficient of thermal expansion; and the deformation component 20 may also include multiple elastic elements stacked together, with different coefficients of thermal expansion between each elastic element, so that expansion and contraction can occur when the temperature of the deformation component 20 changes. This application embodiment does not limit this.

[0053] This application embodiment uses the deformable component 20, which includes a first elastic member 21 and a second elastic member 22, as an example for illustration. The deformable component 20 is disposed on the body 11. Exemplarily, the deformable component 20 may be disposed within the body 11, or the deformable component 20 may be disposed within the receiving groove 12 and in contact with the groove wall of the receiving groove 12.

[0054] Furthermore, the deformable component 20 contacts at least a portion of the first sealing edge 111 and a portion of the second sealing edge 112. This "contact" can be understood as the deformable component 20 being at least partially fitted with the first sealing edge 111 and the second sealing edge 112. The deformable component 20 is configured to provide tension or contraction force to the body 11 to adjust the sealing force between the first sealing edge 111, the second sealing edge 112 and the sealed body, that is, to adjust the sealing force between the first sealing edge 111 and the rotating shaft 200, and to adjust the sealing force between the second sealing edge 112 and the mounting cavity 310.

[0055] For example, the deformable component 20 is disposed within the body 11 and located at the bottom of the body 11; part of the deformable component 20 is disposed within the first sealing edge 111, and part of the deformable component 20 is disposed within the second sealing edge 112. When the flexible sealing sleeve 10 is in a high-temperature environment, the deformation amounts of the first elastic element 21 and the second elastic element 22 are different, which will cause the deformable component 20 to expand, thereby increasing the sealing force between the first sealing edge 111, the second sealing edge 112 and the sealed body.

[0056] Similarly, when the flexible sealing sleeve is in a low-temperature environment, the deformation of the first elastic element 21 and the second elastic element 22 is different, which will cause the deformation component 20 to shrink, thereby reducing the sealing force between the first sealing edge 111, the second sealing edge 112 and the sealed body.

[0057] In related technologies, the flexible sealing sleeve 10 of the spring energy storage sealing ring softens significantly at high temperatures, resulting in a substantial decrease in material stiffness and a significant reduction in sealing force. Conversely, it hardens significantly at low temperatures, leading to a substantial increase in stiffness and a significant improvement in sealing force. This results in severe wear of the flexible sealing sleeve 10. Therefore, the spring energy storage sealing ring is at risk of failure under extreme high and low temperatures.

[0058] However, the elastic sealing device 100 provided in this application embodiment has a deformation component 20 provided inside the flexible sealing sleeve. The deformation component 20 can adaptively adjust its deformation with temperature changes, thereby adjusting the sealing force between the flexible sealing sleeve 10 and the sealed body, so that the sealing ability of the flexible sealing sleeve 10 remains stable. This can reduce the risk of sealing failure of the flexible sealing sleeve 10 under extreme high and low temperatures, and improve the application range of the spring energy storage sealing ring under wide range of high and low temperature conditions.

[0059] Based on the above embodiments, the deformable component 20 provided in this application embodiment can not only adaptively adjust the sealing force between the flexible sealing sleeve 10 and the sealed body as the temperature changes, but also support the flexible sealing sleeve 10.

[0060] like Figure 3 As shown, to ensure the structural strength or support strength of the flexible sealing sleeve 10, the elastic sealing device 100 provided in this embodiment further includes a circumferential spring 30, wherein the circumferential spring 30 is configured to cooperate with the receiving groove 12, and the circumferential spring 30 is embedded in the receiving groove 12 through an opening. When the circumferential spring 30 is embedded in the receiving groove 12, the second elastic member 22 is in contact with the circumferential spring 30, and the first elastic member 21 is located on the side of the second elastic member 22 away from the circumferential spring 30. This configuration can improve the sealing force between the flexible sealing sleeve 10 and the sealed body, and also provide support for the flexible sealing sleeve 10.

[0061] The body 11 provided in this embodiment further includes a root 113. Along the second direction, a first sealing edge 111 and a second sealing edge 112 are respectively disposed on both sides of the root 113, and the first sealing edge 111 and the second sealing edge 112 are disposed opposite to each other. The first sealing edge 111, the second sealing edge 112 and the root 113 form a receiving groove 12. With this configuration, some deformable components 20 can be disposed in the root 113, some deformable components 20 can be disposed in the first sealing edge 111, and some deformable components 20 can be disposed in the second sealing edge 112, which can increase the contact area between the deformable components 20 and the body 11 and improve the force transmission effect between them.

[0062] In this embodiment, the deformable component 20 is disposed in the receiving groove 12, and the first elastic member 21 is disposed on the outside of the second elastic member 22, that is, the first elastic member 21 is disposed on the side of the second elastic member 22 facing the body 11, and the first elastic member 21 is in contact with the inner wall of the receiving groove 12.

[0063] Furthermore, the coefficient of thermal expansion of the first elastic element 21 is less than that of the second elastic element 22. When the flexible sealing sleeve 10 is in a high-temperature environment, the deformation (expansion) of the first elastic element 21 is less than that of the second elastic element 22, causing the second elastic element 22 to become relatively longer. As a result, the deformation component 20 expands and increases the sealing force between the first sealing edge 111, the second sealing edge 112 and the sealed body, in order to compensate for the decrease in contact force caused by the softening of the flexible sealing sleeve 10 at high temperature. This keeps the sealing force between the flexible sealing sleeve 10 and the sealed body constant and improves the sealing effect.

[0064] Furthermore, when the flexible sealing sleeve 10 is in a low-temperature environment, the deformation (shrinkage) of the first elastic element 21 is less than the deformation (shrinkage) of the second elastic element 22, causing the second elastic element 22 to become relatively shorter. This causes the deformation assembly 20 to shrink, reducing the sealing force between the first sealing edge 111, the second sealing edge 112, and the sealed body. Because the hardness of the flexible sealing sleeve 10 increases in a low-temperature environment, the sealing force between the flexible sealing sleeve 10 and the sealed body increases, leading to increased friction and severe wear of the flexible sealing sleeve 10. With this configuration, in this embodiment, the shrinkage of the deformation assembly 20 in a low-temperature environment reduces the aforementioned sealing force, keeping the sealing force between the flexible sealing sleeve 10 and the sealed body constant, thus improving the sealing effect.

[0065] Furthermore, in this embodiment, the projection of the second elastic element 22 onto the first elastic element 21 coincides with the first elastic element 21, meaning that the first elastic element 21 and the second elastic element 22 have the same length, and the first elastic element 21 and the second elastic element 22 can be configured as an integral structure. It should be noted that in this embodiment, the lengths of the first elastic element 21 and the second elastic element 22 may be different and can be adjusted as needed; this embodiment does not impose any limitations on this.

[0066] Preferably, in this embodiment of the application, the first elastic member 21 and the second elastic member 22 have the same length, the second elastic member 22 is laid on one side of the first elastic member 21, and the first elastic member 21 is in contact with the wall of the receiving groove 12, so as to describe in detail the arrangement scheme of the deformable component 20 in the receiving groove 12.

[0067] The deformable component 20 provided in this application embodiment has a portion of the first elastic element 21 attached to the first sealing edge 111, a portion of the first elastic element 21 attached to the second sealing edge 112, and a portion attached to the surface of the root 113.

[0068] like Figure 3As shown, in one embodiment, the first elastic member 21 and the second elastic member 22 are respectively configured as an integral structure, and the first elastic member 21 is U-shaped and covers the entire surface of the root 113. Exemplarily, both the first elastic member 21 and the second elastic member 22 are configured as a U-shaped integral structure, and the second elastic member 22 is disposed inside the first elastic member 21. The middle portion of the first elastic member 21 covers the root 113, and the two side portions of the first elastic member 21 are respectively abutted against the first sealing edge 111 and the second sealing edge 112.

[0069] like Figure 4 As shown, based on the above embodiment, the first elastic member 21 can cover the entire groove wall of the receiving groove 12, that is, the first elastic member 21 can not only cover the surface of the root 113, but also cover the first sealing edge 111 and the second sealing edge 112.

[0070] For example, both the first elastic element 21 and the second elastic element 22 are configured as a U-shaped integral structure, with the second elastic element 22 disposed inside the first elastic element 21. The middle portion of the first elastic element 21 covers the root 113, and the two side portions of the first elastic element 21 can respectively cover the first sealing edge 111 and the second sealing edge 112. This configuration increases the contact area between the deformable component 20 and the body 11, which is beneficial for the transmission of the deformation force generated by the deformable component 20 to the body 11, thereby improving the adjustment effect of the sealing force between the flexible sealing sleeve 10 and the sealed body.

[0071] like Figure 5 As shown, this application embodiment provides another arrangement of the deformable component 20 within the receiving groove 12. Specifically, the first elastic member 21 and the second elastic member 22 are respectively configured as separate structures, wherein the first elastic member 21 includes two L-shaped structures, which are respectively arranged on both sides of the root 113 along the second direction. Correspondingly, the second elastic member 22 also includes two L-shaped structures disposed inside the first elastic member 21.

[0072] Taking the first elastic element 21, which includes two L-shaped structures, as an example, each L-shaped structure includes a first part and a second part. The first part covers the surface of the root 113, and the second part covers the surface of the first sealing edge 111, or the second part covers the surface of the second sealing edge 112. With this configuration, the deformable component 20 can partially cover the root 113, partially cover the first sealing edge 111, and partially cover the second sealing edge 112, thereby adjusting the sealing force between the first sealing edge 111, the second sealing edge 112, and the sealed body.

[0073] like Figure 6As shown, along the first direction, in this embodiment, the deformable component 20 can also be disposed at the opening of the receiving groove 12. Specifically, the deformable component 20 is disposed at the opening of the receiving groove 12, wherein the first elastic element 21 of the deformable component 20 covers the second elastic element 22, and the first elastic element 21 can cover the opening of the receiving groove 12. Part of the first elastic element 21 is in contact with the first sealing edge 111, and part of the first elastic element 21 is in contact with the second sealing edge 112. With this arrangement, the deformation force of the deformable component 20 can be transmitted to the first sealing edge 111 and the second sealing edge 112 to adjust the sealing force between the first sealing edge 111, the second sealing edge 112 and the sealed body.

[0074] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0075] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0076] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0077] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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. Such 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 this application.

Claims

1. A resilient sealing device, characterized in that, Including flexible sealing sleeves and deformable components; The flexible sealing sleeve includes an annular body, which has a receiving groove along its circumference, and a first sealing edge and a second sealing edge are formed on both sides of the body. The deformable component includes at least a first elastic element and a second elastic element stacked together, wherein the first elastic element and the second elastic element have different coefficients of thermal expansion. The deformable component is disposed on the body, and the deformable component is in contact with at least a portion of the first sealing edge and a portion of the second sealing edge. The deformable component is configured to provide tension or contraction force to the body to adjust the sealing force between the first sealing edge, the second sealing edge and the sealed body. The body also includes a root; The first sealing edge and the second sealing edge are respectively disposed on both sides of the root and form the receiving groove; The deformable component is disposed within the receiving groove; The coefficient of thermal expansion of the first elastic element is smaller than that of the second elastic element; The first elastic element is disposed on the side of the second elastic element facing the body and is in contact with the inner wall of the receiving groove; The projection of the second elastic element onto the first elastic element coincides with the first elastic element; The deformable component is disposed at the opening of the receiving groove; The first elastic element covers the opening of the receiving groove, and a portion of the first elastic element is in contact with the first sealing edge, while a portion of the first elastic element is in contact with the second sealing edge.

2. The elastic sealing device according to claim 1, characterized in that, The elastic sealing device also includes a circumferential spring; The circumferential spring is disposed within the receiving groove and is in contact with the second elastic element; The first elastic element is located on the side of the second elastic element that is opposite to the circumferential spring.

3. An elastic sealing device, characterized in that, Including flexible sealing sleeves and deformable components; The flexible sealing sleeve includes an annular body, which has a receiving groove along its circumference, and a first sealing edge and a second sealing edge are formed on both sides of the body. The deformable component includes at least a first elastic element and a second elastic element stacked together, wherein the first elastic element and the second elastic element have different coefficients of thermal expansion. The deformable component is disposed on the body, and the deformable component is in contact with at least a portion of the first sealing edge and a portion of the second sealing edge. The deformable component is configured to provide tension or contraction force to the body to adjust the sealing force between the first sealing edge, the second sealing edge and the sealed body. The body also includes a root; The first sealing edge and the second sealing edge are respectively disposed on both sides of the root and form the receiving groove; The deformable component is disposed within the receiving groove; The coefficient of thermal expansion of the first elastic element is smaller than that of the second elastic element; The first elastic element is disposed on the side of the second elastic element facing the body and is in contact with the inner wall of the receiving groove; The projection of the second elastic element onto the first elastic element coincides with the first elastic element; Part of the first elastic element is in contact with the first sealing edge; Part of the first elastic element is in contact with the second sealing edge, and part of the first elastic element is in contact with the root portion; The first elastic element and the second elastic element are respectively configured as separate structures; The first elastic element includes two L-shaped structures, and the two L-shaped structures are respectively arranged on both sides of the root. Each of the L-shaped structures includes a first portion and a second portion, wherein the first portion covers the surface of the root; and the second portion covers the surface of the first sealing edge, or covers the surface of the second sealing edge.

4. The elastic sealing device according to claim 3, characterized in that, The elastic sealing device also includes a circumferential spring; The circumferential spring is disposed within the receiving groove and is in contact with the second elastic element; The first elastic element is located on the side of the second elastic element that is opposite to the circumferential spring.

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