Sealing structure

Abstract

The invention relates to the field of sealing, and provides a sealing structure. The sealing structure comprises a flexible clamping sleeve, and a containing groove is formed in the flexible clamping sleeve. The deformation part is arranged in the containing groove, a containing cavity used for being filled with a working medium is formed in the deformation part, and the working medium is used for driving the outer wall of the deformation part to be attached to the inner groove wall of the containing groove. According to the sealing structure, it can be guaranteed that the excellent sealing performance can be kept under different working conditions and environment changes, and the problems that due to the fixed shape of a traditional sealing piece, sealing fails, and the sealing capacity cannot be flexibly adjusted are solved. And meanwhile, when the sealing pressure is adjusted, the sealing capacity can be adjusted in real time without shutdown overhaul or sealing element disassembly and assembly. The flexible clamping sleeve and the deformation piece are wide in material selection and can be selected in a customized mode according to the requirements of specific application scenes. The sealing structure is simple in design, a complex adjusting process is not needed during installation, the installation difficulty and cost are reduced, and meanwhile the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of sealing and provides a sealing structure. Background Art

[0002] In the related art, the energy storage seal device has very limited adjustment of its sealing force while ensuring the sealing performance. Typical energy storage seals use metal springs to provide sealing force. However, their adjustment method mainly relies on replacing seals or sealing grooves, or even replacing sealing materials, which brings many inconveniences. On the one hand, replacing seals or modifying sealing grooves requires disassembly and reinstallation, which increases the complexity of repair and maintenance and downtime, and increases the cost of equipment. On the other hand, the cost of replacing sealing materials will also increase accordingly, and limit the applicability of seals under different working conditions. Summary of the invention

[0003] The embodiment of the present invention provides a sealing structure to solve the defect that the sealing ability of the sealing structure in the related art cannot be flexibly adjusted.

[0004] An embodiment of the present invention provides a sealing structure, including: A flexible jacket, wherein a receiving groove is formed in the flexible jacket; The deformable member is arranged in the containing groove and has a containing cavity for filling a working medium therein. The working medium is used to drive the outer wall of the deformable member to fit the inner groove wall of the containing groove.

[0005] According to an embodiment of the present invention, a mounting hole connected to the fluid of the accommodating chamber is formed on the deformable member, and a pressure regulating tube is installed in the mounting hole.

[0006] According to one embodiment of the present invention, the flexible jacket is annular, the accommodating groove is annularly opened along the circumference of the flexible jacket, and the deformable member is annularly arranged along the circumference of the accommodating groove.

[0007] According to one embodiment of the present invention, the flexible jacket comprises: Jacket body; A first lip and a second lip are arranged at intervals on both sides of the jacket body, and the first lip, the second lip and the jacket body surround the accommodating groove.

[0008] According to an embodiment of the present invention, the distance between the geometric center of the deformation member and the jacket body is less than half of the height of the first lip.

[0009] According to an embodiment of the present invention, the deformable member is a bellows.

[0010] According to an embodiment of the present invention, the bellows is a metal bellows.

[0011] According to an embodiment of the present invention, the flexible jacket is made of polytetrafluoroethylene.

[0012] According to one embodiment of the present invention, it further comprises a sealing groove, a mounting position is formed on the sealing groove, and the flexible jacket is arranged at the mounting position.

[0013] According to one embodiment of the present invention, when the sealing groove is sleeved on the member to be sealed, the flexible jacket is used to close the gap between the sealing groove and the member to be sealed.

[0014] According to the sealing structure provided by the embodiment of the present invention, by filling the working medium (such as gas, liquid or deformable solid material) in the deformable member, the working medium can drive the deformable member to deform to a certain extent, so that the outer wall of the deformable member is closely attached to the inner wall of the accommodating groove of the flexible jacket. This adaptive ability ensures that the sealing structure can maintain excellent sealing performance under different working conditions and environmental changes, avoiding the sealing failure caused by the fixed shape of the traditional seal and the problem that the sealing ability cannot be flexibly adjusted. At the same time, while adjusting the sealing pressure, the real-time adjustment of the sealing ability can be achieved without stopping for maintenance or disassembling the seal. The driving effect of the working medium on the deformable member makes the contact between the sealing surfaces closer, reduces the leakage channel, and thus improves the reliability of the seal. Even when used for a long time or subjected to external factors such as vibration and impact, a stable sealing effect can be maintained, extending the service life of the sealing structure. The material selection of the flexible jacket and the deformable member is wide, and can be customized according to the needs of the specific application scenario. For example, the flexible jacket can be made of high temperature resistant and corrosion resistant materials to adapt to harsh working environments; the deformable parts can select suitable working fluids and materials according to the required sealing pressure, temperature range and other factors to ensure the overall performance of the sealing structure. The sealing structure is simple in design and does not require a complicated adjustment process during installation, which reduces the difficulty and cost of installation. At the same time, since the contact between the sealing surfaces is close and uniform, the risk of wear and damage is reduced, making maintenance easier. In some applications, such as when using gas or liquid as the working fluid, the sealing performance can be optimized by adjusting the type and state of the working fluid, while reducing energy consumption and environmental pollution. In addition, due to the improved sealing effect, resource waste and safety hazards caused by leakage are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic stereoscopic diagram of the sealing structure provided by the present invention.

[0017] Figure 2 It is a schematic top view of the sealing structure provided by the present invention.

[0018] Figure 3 It is a schematic top cross-sectional view of the sealing structure provided by the present invention.

[0019] Figure 4 It is a schematic front cross-sectional view of the sealing structure provided by the present invention.

[0020] Figure 5 It is a schematic structural diagram of the sealing structure provided by the present invention used for a component to be sealed.

[0021] Reference numerals: 100, flexible jacket; 102, receiving groove; 104, deformation member; 106, working medium; 108, pressure regulating pipe; 110, jacket body; 112, first lip; 114, second lip; 116, sealing groove; 118, member to be sealed. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] like Figures 1 to 5 As shown, an embodiment of the present invention provides a sealing structure, comprising: A flexible jacket 100, wherein a receiving groove 102 is formed in the flexible jacket 100; The deformable member 104 is disposed in the receiving groove 102 and has a receiving cavity for filling a working medium 106 formed therein. The working medium 106 is used to drive the outer wall of the deformable member 104 to fit the inner groove wall of the receiving groove 102 .

[0024] According to the sealing structure provided by the embodiment of the present invention, by filling the working medium 106 (such as gas, liquid or deformable solid material) in the deformable member 104, the working medium 106 can drive the deformable member 104 to deform to a certain extent, so that the outer wall of the deformable member 104 is closely attached to the inner groove wall of the receiving groove 102 of the flexible jacket 100. This adaptive ability ensures that the sealing structure can maintain excellent sealing performance under different working conditions and environmental changes, avoiding the sealing failure caused by the fixed shape of the traditional seal and the problem that the sealing ability cannot be flexibly adjusted. At the same time, while adjusting the sealing pressure, the real-time adjustment of the sealing ability can be achieved without stopping for maintenance or disassembling the seal. The driving action of the working medium 106 on the deformable member 104 makes the contact between the sealing surfaces closer, reduces the leakage channel, and thus improves the reliability of the seal. Even when used for a long time or subjected to external factors such as vibration and impact, a stable sealing effect can be maintained, extending the service life of the sealing structure. The material selection of the flexible jacket 100 and the deformable member 104 is wide, and can be customized according to the needs of the specific application scenario. For example, the flexible jacket 100 can be made of high temperature resistant and corrosion resistant materials to adapt to harsh working environments; the deformable member 104 can select suitable working fluids 106 and materials according to the required sealing pressure, temperature range and other factors to ensure the overall performance of the sealing structure. The sealing structure is simple in design and does not require a complicated adjustment process during installation, which reduces the difficulty and cost of installation. At the same time, since the contact between the sealing surfaces is close and uniform, the risk of wear and damage is reduced, making maintenance easier. In some applications, such as when using gas or liquid as the working fluid 106, the sealing performance can be optimized by adjusting the type and state of the working fluid 106, while reducing energy consumption and environmental pollution. In addition, due to the improved sealing effect, resource waste and safety hazards caused by leakage are reduced.

[0025] Please continue to see Figures 1 to 5 An embodiment of the present invention provides a sealing structure, which is mainly composed of two parts: a flexible jacket 100 and a deformable member 104.

[0026] The flexible jacket 100 is a basic component of the sealing structure, and the flexible jacket 100 is made of a material with certain elasticity and flexibility, such as rubber, silicone, elastic plastic, etc.

[0027] In the embodiment of the present invention, the flexible jacket 100 is made of polytetrafluoroethylene, which is resistant to acids, alkalis, and various organic solvents, and also has a wide temperature resistance range.

[0028] An accommodating groove 102 is formed inside the flexible jacket 100 . The shape, size and number of the accommodating groove 102 can be customized according to specific sealing requirements to ensure a close fit with the deformable member 104 .

[0029] The deformable member 104 is installed in the receiving groove 102 of the flexible jacket 100, and a receiving cavity is provided inside the deformable member 104 for filling a specific working medium 106. The selection of the working medium 106 depends on the required sealing performance, working environment conditions and material properties of the deformable member 104. Common working mediums 106 include gases (such as inert gases such as nitrogen and argon), liquids (such as water, oil or other special liquids), etc. The working medium 106 filled in the receiving cavity can undergo a volume change or a shape change, thereby driving the outer wall of the deformable member 104 to deform, so that the outer wall of the deformable member 104 is closely attached to the inner groove wall of the receiving groove 102, forming an effective seal.

[0030] Through the driving effect of the working medium 106 on the deformable member 104, the deformable member 104 can adaptively fit the inner groove wall of the receiving groove 102 to form a tight sealing interface. This adaptive ability effectively reduces the leakage channel and improves the reliability and durability of the seal. More importantly, by setting the pressure, volume and other parameters of the working medium 106, the pressure between the deformable member 104 and the receiving groove 102 can be flexibly adjusted, thereby achieving flexible adjustment of different sealing performances and different sealing pressures.

[0031] According to an embodiment of the present invention, a mounting hole in fluid communication with the accommodating chamber is provided on the deformable member 104 , and a pressure regulating tube 108 is installed in the mounting hole.

[0032] like Figure 5 As shown, in one embodiment of the present invention, the accommodating chamber inside the deformable member 104 is used to accommodate the working medium 106. In order to achieve accurate regulation of the fluid pressure in the accommodating chamber, a mounting hole directly in fluid communication with the accommodating chamber is specially provided on the deformable member 104. The mounting hole not only serves as a channel for fluid flow, but is also used to install and fix the pressure regulating tube 108.

[0033] The pressure regulating tube 108 may be provided with a valve, a throttle hole or other pressure regulating mechanism to control the flow of the working fluid 106 through the pressure regulating structure, thereby effectively regulating the pressure in the accommodating chamber. By installing the pressure regulating tube 108 in the mounting hole, the sealing between the pressure regulating tube 108 and the accommodating chamber is ensured, and the pressure regulating tube 108 can be ensured to work stably and reliably, thereby achieving precise control of the fluid pressure.

[0034] By installing the pressure regulating tube 108, the fluid flow passing through it can be quickly responded and adjusted, thereby achieving precise control of the fluid pressure in the accommodating chamber. In a system that needs to maintain a specific sealing capability, the setting of the deformable member 104 and the pressure tube can significantly improve the stability of the sealing performance. By adjusting the pressure in real time, the system performance degradation or failure caused by excessive pressure fluctuations is avoided.

[0035] In certain application scenarios, such as high-pressure gas storage or transmission systems, stable control of pressure is crucial to ensure the safety of personnel and equipment. The embodiment of the present invention effectively reduces the safety risks caused by pressure loss by providing a pressure regulating tube 108. Since the pressure regulating tube 108 can be designed and selected according to specific needs, the deformable member 104 in the embodiment of the present invention has strong adaptability. Whether it is necessary to adjust the gas pressure or the liquid pressure, it can be achieved by replacing or adjusting the pressure regulating tube 108.

[0036] In addition, the pressure regulating tube 108 is installed on the deformable member 104 as an independent component, and its maintenance and replacement become easier. When necessary, the pressure regulating tube 108 can be easily disassembled for inspection, repair or replacement, which reduces maintenance costs and time.

[0037] According to one embodiment of the present invention, the flexible jacket 100 is annular, the receiving groove 102 is annularly provided along the circumference of the flexible jacket 100 , and the deformable member 104 is annularly provided along the circumference of the receiving groove 102 .

[0038] In one embodiment of the present invention, the flexible jacket 100 is annular in shape, and is intended to provide a stable and adaptable mounting structure for the internal deformable member 104. The above-mentioned receiving groove 102 is provided along the circumference of the flexible jacket 100, that is, on a circular path around its central axis. The receiving groove 102 is used to carry the deformable member 104 and allow the deformable member 104 to change shape under certain conditions.

[0039] Similarly, in order to ensure that the deformable member 104 can adapt to the shape of the accommodating groove 102, the shape of the deformable member 104 is also annular. The choice of this shape ensures that the deformable member 104 can be evenly distributed inside the flexible jacket 100, and ensures that the deformable member 104 can expand evenly when deformed to achieve a close fit with the inner groove wall of the accommodating groove 102.

[0040] The annular design of the flexible jacket 100 and the circumferentially opened receiving groove 102 provide a firm and stable installation position for the deformable member 104. This design can not only effectively prevent the displacement or falling off of the deformable member 104 during operation, but also enhance the stability of its overall structure and improve the durability and reliability of the equipment. The deformable member 104 is arranged in an annular manner along the circumferential direction of the receiving groove 102, so that it is more evenly stressed and can deform more evenly, which helps to reduce the stress concentration phenomenon during the deformation process, prolong the service life of the deformable member 104, and improve the accuracy and repeatability of its deformation performance. The flexible design and adaptability of the flexible jacket 100 enable the flexible jacket 100 to adapt to deformable members 104 of different shapes and sizes. At the same time, by adjusting the number, size and position of the receiving groove 102, the matching relationship between the deformable member 104 and the flexible jacket 100 can be further optimized to achieve more accurate deformation control.

[0041] Furthermore, in application scenarios that need to withstand high pressure, high temperature or other harsh working environments, the safety risks caused by changes in factors such as pressure and temperature can be reduced by accurately controlling the deformation process of the deformable member 104.

[0042] According to one embodiment of the present invention, the flexible jacket 100 comprises: Jacket body 110; The first lip 112 and the second lip 114 are disposed at intervals on both sides of the jacket body 110 . The first lip 112 , the second lip 114 and the jacket body 110 surround the receiving groove 102 .

[0043] See also Figure 5 In one embodiment of the present invention, the flexible jacket 100 is mainly composed of three parts: a jacket body 110, a first lip 112 and a second lip 114. The jacket body 110 is the main structural support part of the flexible jacket 100, and its shape and size are designed according to specific application requirements. The first lip 112 and the second lip 114 are arranged at intervals on both sides of the jacket body 110, and the first lip 112, the second lip 114 and the jacket body 110 are integrally formed and together surround an annular receiving groove 102.

[0044] Specifically, if Figure 5 As shown, the first lip 112 and the second lip 114 can be in the form of a protrusion extending upward relative to the jacket body 110. This arrangement not only enhances the rigidity and stability of the jacket as a whole, but also provides a precise and stable installation position for the deformable member 104 through the accommodating groove 102 formed by the first lip 112, the second lip 114 and the jacket body 110.

[0045] The shape, size and depth of the receiving groove 102 can be adjusted according to the specific requirements of the deformable member 104 to ensure that the deformable member 104 can be tightly and firmly installed in the groove and maintain a stable shape and position during operation.

[0046] It is understandable that when the deformable member 104 is deformed, the deformable member 104 can at least fit tightly with at least one of the first lip 112 and the second lip 114. In the embodiment of the present invention, when the deformable member 104 is deformed, the deformable member 104 can fit tightly with the first lip 112, the second lip 114 and the jacket body 110.

[0047] When the deformable member 104 is installed in the receiving groove 102 and deformed, the first lip 112 and the second lip 114 can play a certain squeezing and sealing role to prevent external impurities from entering the jacket, thereby protecting the deformable member 104 from contamination or damage.

[0048] The combination of the jacket body 110 and the first lip 112 and the second lip 114 provides a solid support structure for the deformable member 104. No matter what kind of deformation or displacement occurs to the deformable member 104 during operation, the jacket body 110 can maintain effective support for the deformable member 104 through its stable shape and strength, preventing the deformable member 104 from excessive or uncontrolled deformation. The design of the receiving groove 102 simplifies the installation process of the deformable member 104. Since the shape and size of the receiving groove 102 have been set accordingly according to the deformable member 104, during the installation of the deformable member 104, it is only necessary to align the deformable member 104 with the notch and gently push it in to achieve fast and accurate positioning.

[0049] In addition, by adjusting the size and shape of the jacket body 110, the first lip 112 and the second lip 114, the flexible jacket 100 provided by the embodiment of the present invention can adapt to a variety of deformable members 104 of different shapes and sizes. The tight fit between the flexible jacket 100 and the deformable member 104 helps to improve the sealing performance of the entire sealing structure.

[0050] According to one embodiment of the present invention, the distance between the geometric center of the deformation member 104 and the jacket body 110 is less than half of the height of the first lip 112 .

[0051] It is understandable that, assuming that the cross section of the deformable member 104 is circular, during the installation of the deformable member 104 , the distance between the cross-sectional center of the deformable member 104 and the jacket body 110 is less than half the height of the first lip 112 .

[0052] For example, assuming that the cross-sectional radius of the deformable member 104 is 5 cm, the height of the first lip 112 should be set to be at least greater than 10 cm. The purpose of such setting is that when the deformable member 104 is installed in the receiving groove 102, if the distance between the deformable member 104 and the jacket body 110 is 8 cm, and the height of the first lip 112 is 10 cm, the deformable member 104 is likely to come out of the receiving groove 102 during the deformation process, which will cause the failure of the sealing structure. Therefore, in order to avoid the above situation, when the deformable member 104 is installed in the receiving groove 102, the height of the first lip 112 is greater than or equal to the diameter of the deformable member 104.

[0053] In the embodiment of the present invention, the heights of the first lip 112 and the second lip 114 are equal, and thus, the height of the first lip 112 mentioned above is replaced by the height of the second lip 114. In addition, it should be noted that in order to ensure that the deformable member 104 can be uniformly deformed during the deformation process, the cross-sectional shape of the deformable member 104 is preferably circular. In some other embodiments, the cross-sectional shape of the deformable member 104 can also be set to a rectangular, elliptical, etc. according to actual sealing requirements.

[0054] According to an embodiment of the present invention, the deformation member 104 is a bellows.

[0055] In one embodiment of the present invention, the deformable member 104 is embodied as a bellows, which is a tubular element with a special structure, and its outer wall forms a series of periodic corrugated shapes along the length direction. This corrugated shape gives the bellows unique flexibility and elasticity, so that it can deform when subjected to external pressure or tension, and return to its original shape after the external force is removed. More importantly, compared with the metal spring in the related art, the lateral deformation stiffness of the bellows is extremely small, and it is more likely to deform along the radial direction of the bellows.

[0056] In addition, it should be noted that, considering that the expansion of the bellows depends on the deformation of the bellows, for application scenarios with large deformation or high pressure, the corrugation shape of the bellows can be set relatively deep, so that the bellows has a larger cross-sectional area after further expansion.

[0057] In some other embodiments, the bellows may also use a rubber hollow ring, a plastic hollow ring or a metal hollow ring.

[0058] According to one embodiment of the present invention, the bellows is a metal bellows.

[0059] In one embodiment of the present invention, considering that the bellows need a higher pressure resistance, the bellows is embodied as a metal bellows. Metal bellows can usually be made of stainless steel, high-elastic alloy steel or other high-strength, corrosion-resistant metal materials. The bellows made of such materials have excellent mechanical properties and durability. The metal bellows not only has the flexibility and elasticity of ordinary bellows, but also has the high strength, high temperature resistance, corrosion resistance and other characteristics of metal materials. Therefore, it is particularly suitable for application scenarios that need to withstand high pressure, high temperature or corrosive media.

[0060] It is understandable that the bellows is selected as the deformable member 104, and the unique corrugated structure of the bellows is utilized to enable it to deform in a wide range while maintaining good elasticity and recovery. This characteristic enables the bellows to adapt to various complex working conditions and maintain stable sealing performance during the working process.

[0061] Metal bellows are made of high-strength, corrosion-resistant metal materials, so they have excellent mechanical properties and durability. Even when working in an environment of high pressure, high temperature or corrosive media, metal bellows can maintain stable performance and are not prone to damage or failure.

[0062] According to an embodiment of the present invention, a sealing groove 116 is further included. A mounting position is formed on the sealing groove 116, and the flexible jacket 100 is disposed at the mounting position.

[0063] like Figure 5 As shown, in one embodiment of the present invention, in addition to the flexible jacket 100 and the deformable member 104, a sealing groove 116 is introduced. The sealing groove 116 is generally annular L-shaped, and an installation position for installing the flexible jacket 100 is formed on the sealing groove 116.

[0064] The sealing groove 116 can be directly sleeved on the cylindrical sealing member 118, so that the sealing groove 116 and the cylindrical sealing member 118 can form an installation position for installing the flexible jacket 100. In this process, when the deformable member 104 is deformed, the outer edge of the flexible jacket 100 can be synchronously driven to move toward the outer edge of the flexible jacket 100. Figure 5 The flexible jacket 100 is deformed in the left and right directions as shown. At this time, the outer edge of the flexible jacket 100 is tightly fitted with the side wall of the sealing groove 116 and the sealed member 118 to form an effective sealing barrier, thereby forming an effective seal between the upper and lower parts of the sealing groove 116.

[0065] By setting a mounting position on the sealing groove 116 and installing the flexible jacket 100, the sealing performance of the sealing structure is significantly improved. The tight fit between the flexible jacket 100, the sealing groove 116 and the sealed member 118 effectively prevents the penetration of the medium on the upper and lower sides of the sealing groove 116. The sealing groove 116 provides a stable support structure for the flexible jacket 100, which not only ensures the long-term maintenance of the sealing performance, but also improves the reliability and durability of the entire sealing structure.

[0066] According to one embodiment of the present invention, when the sealing groove 116 is sleeved on the part to be sealed 118 , the flexible jacket 100 is used to close the gap between the sealing groove 116 and the part to be sealed 118 .

[0067] In one embodiment of the present invention, the sealing groove 116 is designed to be sleeved on the outside of the sealed member 118. Since the sealing groove 116 itself cannot achieve a sealing effect, in order to achieve sealing, a flexible jacket 100 is introduced and used to close the gap between the sealing groove 116 and the sealed member 118.

[0068] The flexible jacket 100, with its good flexibility and elasticity, can fit tightly on the surfaces of the sealing groove 116 and the part to be sealed 118, and fill the gap between the sealing groove 116 and the part to be sealed 118. This fitting and filling effect not only prevents the medium from penetrating the upper and lower sides of the sealing groove 116, but also enhances the connection strength between the sealing groove 116 and the part to be sealed 118, making the entire sealing structure more stable and reliable.

[0069] That is, the flexible jacket 100 can effectively close the gap between the sealing groove 116 and the part to be sealed 118, thereby significantly improving the sealing performance between the sealing groove 116 and the part to be sealed 118. In some application scenarios with extremely high requirements for sealing performance (such as high pressure, high temperature, corrosive media and other environments), the introduction of the flexible jacket 100 can significantly reduce the safety risks caused by sealing failure.

[0070] In addition, since the flexible jacket 100 can fit tightly between the sealing groove 116 and the sealed component 118 and fill the gap between the sealing groove 116 and the sealed component 118, it can reduce corrosion, wear and other problems caused by medium penetration, help extend the service life of the system, and reduce maintenance costs.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing structure, characterized in that: include: A flexible jacket (100), wherein a receiving groove (102) is formed in the flexible jacket (100); A deformable member (104) is arranged in the accommodating groove (102) and a accommodating cavity for filling a working medium (106) is formed in the deformable member (104). The working medium (106) is used to drive the outer wall of the deformable member (104) to fit the inner groove wall of the accommodating groove (102).

2. The sealing structure according to claim 1, characterized in that: The deformable member (104) is provided with a mounting hole which is in fluid communication with the accommodating chamber, and a pressure regulating tube (108) is installed in the mounting hole.

3. The sealing structure according to claim 1, characterized in that: The flexible jacket (100) is annular in shape, the containing groove (102) is opened in an annular shape along the circumference of the flexible jacket (100), and the deformable member (104) is arranged in an annular shape along the circumference of the containing groove (102).

4. The sealing structure according to claim 1, characterized in that: The flexible jacket (100) comprises: Jacket body (110); A first lip (112) and a second lip (114) are arranged at intervals on both sides of the jacket body (110); the first lip (112), the second lip (114) and the jacket body (110) surround the accommodating groove (102).

5. The sealing structure according to claim 4, characterized in that: The distance between the geometric center of the deformable member (104) and the jacket body (110) is less than half the height of the first lip edge (112).

6. The sealing structure according to any one of claims 1 to 5, characterized in that: The deformable member (104) is a bellows.

7. The sealing structure according to claim 6, characterized in that: The bellows is a metal bellows.

8. The sealing structure according to any one of claims 1 to 5, characterized in that: The flexible jacket (100) is made of polytetrafluoroethylene.

9. The sealing structure according to any one of claims 1 to 5, characterized in that: It also comprises a sealing groove (116), a mounting position being formed on the sealing groove (116), and the flexible jacket (100) is arranged at the mounting position.

10. The sealing structure according to claim 9, characterized in that: When the sealing groove (116) is sleeved on the part to be sealed (118), the flexible jacket (100) is used to close the gap between the sealing groove (116) and the part to be sealed (118).

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