Sealing structures and mechanical devices

Abstract

This application provides a sealing structure and a mechanical device. The sealing structure is used for sealing between a first mechanical structure and a second mechanical structure. The sealing structure includes a first sealing element and a second sealing element. The first sealing element, together with the first mechanical structure, forms a movable space for the second sealing element to move. The second sealing element is movably disposed within the movable space and maintains contact with the first sealing element. The first sealing element includes an elastic portion. The sealing structure is configured such that when the second mechanical structure deforms, and the force-bearing end of the elastic portion is compressed along a first direction and undergoes elastic deformation, the second sealing element is compressed and moves at least along a second direction, maintaining contact with at least the second mechanical structure. Through this configuration, the second sealing element can move closer to the second mechanical structure simultaneously with the formation of a gap, ensuring contact between the first and second mechanical structures, preventing gaps from affecting the sealing effect of the sealing structure, and ensuring the normal operation of the sealing structure.

Description

Technical Field

[0001] This application relates to the field of sealing technology, and more particularly to a sealing structure and mechanical device. Background Technology

[0002] Sealing structures play a vital role in industrial machinery, and their performance, quality, and tolerance to different fluid media are all extremely important.

[0003] In some applications of sealed structures, such as high-pressure pipeline isolation diaphragm structures and nuclear reactor pressure vessels, the objects may be subjected to forces and undergo shape changes due to temperature, pressure and other factors.

[0004] However, traditional sealing structures cannot maintain a stable seal in these situations, which can easily lead to problems such as leakage and damage. Summary of the Invention

[0005] In order to solve at least one of the problems mentioned in the background art, this application provides a sealing structure and mechanical device, which aims to solve the technical problem that the sealing methods in the related art cannot maintain a seal when the structure is deformed, which easily leads to leakage, damage and other problems.

[0006] To achieve the above objectives, in a first aspect, this application provides a sealing structure for sealing between a first mechanical structure and a second mechanical structure. The sealing structure includes a first sealing element and a second sealing element. The first sealing element is used to form an active space for the second sealing element to move together with the first mechanical structure. The second sealing element is movably disposed within the active space and maintains contact with the first sealing element. The first sealing element includes an elastic portion.

[0007] The sealing structure is configured such that when the second mechanical structure deforms, and the force-bearing end of the elastic part is pressed along the first direction and undergoes elastic deformation, the second seal is pressed and moves at least along the second direction, and the second seal remains in contact with the second mechanical structure at least, with the first direction intersecting the second direction.

[0008] Optionally, in the above-described sealing structure, the first sealing member further includes a fixing part, which is connected to the side of the elastic part away from the force-bearing end. The elastic part extends along the second direction, and the fixing part extends along the first direction. The fixing part is used to abut against the first mechanical structure, and the elastic part and the fixing part are used together with the first mechanical structure to form the active space.

[0009] In the above-described sealing structure, optionally, the surface of the elastic part near the movable space is connected to the surface of the fixed part near the movable space, together forming a guide surface for guiding the movement of the second sealing member;

[0010] The guide surface is curved and recessed in a direction away from the active space; or, the guide surface is an inclined plane with a first end and a second end opposite each other. Along the second direction, the second end is located on the side of the first end away from the fixing part, and along the first direction, the second end is located on the side of the first end closer to the force-bearing end.

[0011] In the above-described sealing structure, optionally, the guide surface has a starting position and an ending position that are arranged opposite to each other, with the first end forming the starting position and the second end forming the ending position;

[0012] When the second seal is in the starting position, along the first direction, the orthographic projection of the second seal on the surface where the force-bearing end is located is covered by the force-bearing end.

[0013] Optionally, the sealing structure described above may also include a protrusion;

[0014] The protrusion is disposed on the guide surface, the protrusion protrudes in the direction toward the active space, and the protrusion is used to contact the second seal;

[0015] And / or, the protrusion is provided on the outer surface of the second seal, and the protrusion is used to contact the guide surface.

[0016] In the above-described sealing structure, optionally, the second seal is annular, and the second seal is fitted over at least a portion of the first seal; along a circumferential section perpendicular to the second seal, the cross-section of the second seal is circular;

[0017] The cross-section is along the circumferential surface of the second seal, and the cross-section of the first seal is circular.

[0018] In the above-described sealing structure, optionally, a groove is provided at the center of the force-bearing end along the second direction, and the groove opening is located on the end face of the force-bearing end;

[0019] Along the direction from the groove opening to the bottom of the groove, the opening size of the groove gradually decreases.

[0020] Optionally, the sealing structure described above may also include an elastic member extending along the second direction, one end of which abuts against the first mechanical structure, and the other end which is located at the groove of the elastic portion and abuts against the force-bearing end.

[0021] Along the second direction, the orthographic projection of the elastic element on the force-bearing end covers the groove opening.

[0022] Secondly, this application also provides a mechanical device, including a first mechanical structure, a second mechanical structure, and the aforementioned sealing structure;

[0023] The first mechanical structure has a sealing cavity for placing the sealing structure, the sealing cavity having an opening, and the second mechanical structure covering the opening; the two ends of the first sealing member of the sealing structure respectively abut against the cavity wall of the sealing cavity and the second mechanical structure covering the opening.

[0024] In the aforementioned mechanical device, optionally, there are multiple openings, each opening corresponding to a different position of the second sealing element of the sealing structure, and multiple second mechanical structures; the multiple second mechanical structures correspond one-to-one with the multiple openings, and each covers the corresponding opening.

[0025] The sealing structure and mechanical device provided in this application are used for sealing between a first mechanical structure and a second mechanical structure. The sealing structure includes a first sealing element and a second sealing element. The first sealing element, together with the first mechanical structure, forms an movable space for the second sealing element to move. The second sealing element is movably disposed within the movable space and maintains contact with the first sealing element. The first sealing element includes an elastic portion. The sealing structure is configured such that when the second mechanical structure deforms, the force-bearing end of the elastic portion is compressed along a first direction and undergoes elastic deformation, the second sealing element is compressed and moves at least along a second direction, and the second sealing element maintains contact with at least the second mechanical structure. The first direction and the second direction intersect. With the above configuration, when the second mechanical structure deforms, a gap is easily generated between the second mechanical structure and the first mechanical structure. The force-bearing end of the elastic portion is compressed and undergoes elastic deformation, which can compress the second sealing element and cause it to move, thereby allowing the second sealing element to maintain contact with the second mechanical structure. In this way, the second seal can move closer to the second mechanical structure as the gap is created, so as to ensure that the first mechanical structure and the second mechanical structure come into contact, and avoid the gap caused by the deformation of the second mechanical structure from affecting the sealing effect of the sealing structure, thus ensuring the normal operation of the sealing structure.

[0026] The structure of this application, as well as its other objectives and beneficial effects, will become more apparent and understandable through the description of preferred embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0027] 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.

[0028] Figure 1 A schematic diagram of a first structure in which the second sealing element of the sealing structure provided in the embodiment of this application is in the initial position;

[0029] Figure 2 A schematic diagram of a second structure in which the second sealing element of the sealing structure provided in the embodiment of this application is in the initial position;

[0030] Figure 3 This is a schematic diagram of a first type of sealing structure provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of a second type of sealing structure provided in the embodiments of this application;

[0032] Figure 5 A schematic diagram of the second sealing element in the termination position of the sealing structure provided in the embodiment of this application;

[0033] Figure 6 This is a schematic diagram of a third type of sealing structure provided in the embodiments of this application;

[0034] Figure 7 This is a schematic diagram of a fourth type of sealing structure provided in the embodiments of this application;

[0035] Figure 8 A schematic diagram of one structure of the first sealing element of the sealing structure provided in the embodiments of this application;

[0036] Figure 9 This is a schematic diagram of the fifth type of sealing structure provided in the embodiments of this application;

[0037] Figure 10 This is a schematic diagram of the sixth type of sealing structure provided in the embodiments of this application;

[0038] Figure 11 for Figure 10 An enlarged view of the right side of the middle section;

[0039] Figure 12 This is a schematic diagram of the sixth type of sealing structure provided in the embodiments of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10 - Mechanical device; 100 - First mechanical structure; 200 - Second mechanical structure; 101 - Sealed cavity;

[0042] 300 - Sealed structure; 301 - Active space; 302 - Guide surface; 3021 - First end; 3022 - Second end; X - First direction; Y - Second direction;

[0043] 310 - First seal; 311 - Elastic part; 312 - Fixing part; 313 - Groove; A - Force-bearing end;

[0044] 320 - Second seal; 330 - Elastic element.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] In related technologies, traditional sealing structures include gaskets, rubber rings, and felt. However, in some devices, such as high-pressure pipeline isolation diaphragm structures and nuclear reactor pressure vessels, the devices are subject to pressure and temperature changes, which can easily cause deformation of the mechanical structure. In such cases, the aforementioned sealing structures cannot adjust accordingly to the deformation, making the sealing state easily compromised and leading to problems such as leakage and damage.

[0047] Based on the aforementioned technical problems, this application provides a sealing structure and a mechanical device. The sealing structure is used for sealing between a first mechanical structure and a second mechanical structure. The sealing structure includes a first sealing element and a second sealing element. The first sealing element, together with the first mechanical structure, forms an movable space for the second sealing element to move. The second sealing element is movably disposed within the movable space and maintains contact with the first sealing element. The first sealing element includes an elastic portion. The sealing structure is configured such that when the second mechanical structure deforms, the force-bearing end of the elastic portion is compressed along a first direction and undergoes elastic deformation, the second sealing element is compressed and moves at least along a second direction, and the second sealing element maintains contact with at least the second mechanical structure. The first direction and the second direction intersect. With the above configuration, when the second mechanical structure deforms, a gap is easily generated between the second mechanical structure and the first mechanical structure. The force-bearing end of the elastic portion is compressed and undergoes elastic deformation, which can squeeze the second sealing element and cause it to move, thereby allowing the second sealing element to maintain contact with the second mechanical structure. In this way, the second seal can move closer to the second mechanical structure as the gap is created, so as to ensure that the first mechanical structure and the second mechanical structure come into contact, and avoid the gap caused by the deformation of the second mechanical structure from affecting the sealing effect of the sealing structure, thus ensuring the normal operation of the sealing structure.

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar structural components or structural components with the same or similar functions throughout. The described embodiments are some structural embodiments of this application, not all structural embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. 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. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0049] Figure 1 A schematic diagram of a first structure in which the second sealing element of the sealing structure provided in the embodiment of this application is in the initial position; Figure 2 This is a schematic diagram of a second structure in which the second seal of the sealing structure provided in the embodiment of this application is in the starting position.

[0050] Firstly, refer to the appendix Figure 1 and attached Figure 2 As shown, this application embodiment provides a mechanical device 10, which includes a first mechanical structure 100, a second mechanical structure 200, and a sealing structure 300.

[0051] It should be noted that the shape of the first mechanical structure 100 can be arbitrary. For example, the shape of the first mechanical structure 100 can be plate-shaped, block-shaped, column-shaped, or other shapes. The embodiments of this application do not limit the specific shape of the first mechanical structure 100, nor are they limited to the above examples.

[0052] Furthermore, the shape of the second mechanical structure 200 may be the same as or different from the shape of the first mechanical structure 100. This application embodiment does not limit whether the shape of the first mechanical structure 100 and the shape of the second mechanical structure 200 are the same, nor is it limited to the above example.

[0053] The following explanation uses the example of a cylinder formed by the first mechanical structure 100 and the second mechanical structure 200.

[0054] The first mechanical structure 100 has a sealing cavity 101 for housing the sealing structure 300.

[0055] Furthermore, the sealing cavity 101 has an opening (not shown in the figure), and the second mechanical structure 200 covers the opening. The two ends of the first sealing member 310 of the sealing structure 300 abut against the cavity wall surface of the sealing cavity 101 and the second mechanical structure 200 covering the opening, respectively.

[0056] Specifically, the size of the opening can be arbitrary. The second mechanical structure 200 covers the opening, so that the sealing structure 300 located in the sealing cavity 101 communicates with the outside only through the opening. When the sealing structure 300 is located in the sealing cavity 101, the two ends of the first sealing member 310 of the sealing structure 300 can respectively abut against the inner wall of the sealing cavity 101 and the second mechanical structure 200. The first sealing member 310 can abut against the second mechanical structure 200 covering the opening through the opening, thereby achieving a seal between the first mechanical structure 100 and the second mechanical structure 200.

[0057] It is understood that the first mechanical structure 100 or the second mechanical structure 200 may have a flowing medium. By providing a sealing structure 300, the sealing structure 300 can achieve a seal between the first mechanical structure 100 and the second mechanical structure 200, so as to prevent the flowing medium from entering between the first mechanical structure 100 and the second mechanical structure 200.

[0058] Furthermore, the flowing medium may include, but is not limited to, lubricating media, cooling media, etc., wherein the flowing medium may be solid, gas, or liquid. The embodiments of this application do not limit the specific type of the flowing medium, nor are they limited to the examples above.

[0059] It should be noted that the flowing medium can apply pressure to the sealing structure 300; for example, the flowing medium is a high-pressure liquid.

[0060] Understandably, when a gap is created between the first mechanical structure 100 and the second mechanical structure 200, the flowing medium can flow into the gap. Furthermore, the flowing medium can apply pressure to the sealing structure 300, and under this pressure, the sealing structure 300 can maintain the contact between the first mechanical structure 100 and the second mechanical structure 200.

[0061] As an optional implementation, there are multiple openings, each opening corresponding to a different position of the second seal of the exposed sealing structure 300, and there are multiple second mechanical structures 200; the multiple second mechanical structures 200 correspond one-to-one with the multiple openings, and each covers the corresponding opening.

[0062] It should be noted that the number of openings can be arbitrary. For example, the number of openings can be two, three, four, five, etc. The embodiments of this application do not limit the specific number of openings, nor are they limited to the above examples.

[0063] It is understandable that a second mechanical structure 200 may cover only one opening or cover multiple openings simultaneously. When a second mechanical structure 200 covers only one opening, and there are multiple openings, the number of second mechanical structures 200 can be multiple. Multiple second mechanical structures 200 can correspond one-to-one with multiple openings and cover the corresponding openings one by one. In this case, the number of second mechanical structures 200 is the same as the number of openings.

[0064] When there are multiple openings, the following explanation will be based on the example where there are two openings and two second mechanical structures 200.

[0065] It should be noted that when the sealing cavity 101 has two openings, the two openings can be connected to opposite sides of the sealing cavity 101 respectively. The two second mechanical structures 200 can form a cylindrical shape together with the first mechanical structure 100.

[0066] Understandably, to ensure that openings at different locations can be covered by different second mechanical structures 200, the deformation degree of the second mechanical structures 200 is the same. Furthermore, when a pressurized fluid medium flows inside the first mechanical structure 100, the cross-section of the sealing cavity 101 is a smooth and uniform plane. In this way, different positions of the force-bearing end of the sealing structure 300 can be subjected to pressure of the same magnitude and direction, and thus, different deformation degrees of the second mechanical structures 200 can correspond to different positions of the second sealing element of the sealing structure 300.

[0067] Figure 3 This is a schematic diagram of a first type of sealing structure provided in an embodiment of this application; Figure 4 This is a schematic diagram of a second type of sealing structure provided in the embodiments of this application; Figure 5 A schematic diagram of the second sealing element in the termination position of the sealing structure provided in the embodiment of this application; Figure 6 This is a schematic diagram of a third type of sealing structure provided in the embodiments of this application; Figure 7 This is a schematic diagram of a fourth type of sealing structure provided in the embodiments of this application; Figure 8 A schematic diagram of one structure of the first sealing element of the sealing structure provided in the embodiments of this application; Figure 9 This is a schematic diagram of the fifth type of sealing structure provided in the embodiments of this application; Figure 10 This is a schematic diagram of a sixth type of sealing structure provided in the embodiments of this application; Figure 11 for Figure 10 An enlarged view of the right side of the middle section; Figure 12 This is a schematic diagram of the sixth type of sealing structure provided in the embodiments of this application.

[0068] Secondly, refer to the appendix. Figure 1 - Appendix Figure 12 As shown, this application embodiment also provides a sealing structure 300 for sealing between a first mechanical structure 100 and a second mechanical structure 200. The sealing structure 300 includes a first sealing element 310 and a second sealing element 320.

[0069] Specifically, the first seal 310 is used together with the first mechanical structure 100 to form an active space 301 for the second seal 320 to move.

[0070] It is understood that the first seal 310 is located inside the sealing cavity 101, and the outer surface of the first seal 310 and the cavity wall of the sealing cavity 101 enclose an active space 301.

[0071] Furthermore, the second seal 320 is movably disposed within the movable space 301 and abuts against the first seal 310, that is, the outer surface of the second seal 320 abuts against the outer surface of the first seal 310. The first seal 310 includes an elastic portion 311.

[0072] It should be noted that the elastic part 311 is elastic, and the material used to make the elastic part 311 can be any elastic material. For example, the material used to make the elastic part 311 can be rubber, spring steel, etc. The embodiments of this application do not limit the specific material of the elastic part 311, nor are they limited to the above examples.

[0073] It is understood that the elastic part 311 will change shape when subjected to external force. For example, when the elastic part 311 is subjected to external force, the force-bearing position of the elastic part 311 is squeezed and moves in the direction of the external force to form a shape change. The end face of the elastic part 311 located at the force-bearing position will form the force-bearing end A.

[0074] Furthermore, the sealing structure 300 is configured such that when the second mechanical structure 200 deforms, and the force-bearing end A of the elastic part 311 is compressed along the first direction X and undergoes elastic deformation, the second seal 320 is compressed and moves at least along the second direction Y, and the second seal 320 remains in contact with the first mechanical structure 100 at least, with the first direction X intersecting the second direction Y.

[0075] It should be noted that the deformation of the second mechanical structure 200 can refer to deformation at all locations or deformation at only some locations, and the degree of deformation can be arbitrary. For example, the second mechanical structure 200 may deform only at some locations, with the angle between the cross-section of the undeformed portion and the cross-section of the deformed portion being 15°, 30°, 45°, 60°, 90°, 120°, 150°, etc. Another example is that the second mechanical structure 200 deforms at all locations, such as when the deformed cross-sectional shape is a connected, bent surface.

[0076] Understandably, when the second mechanical structure 200 undergoes the aforementioned deformation, the second mechanical structure 200 covering the opening is prone to deviation, creating a gap between the second mechanical structure 200 and the first mechanical structure 100, which affects the sealing effect of the sealing structure 300. At this time, the elastic part 311 undergoes elastic deformation under external force, compressing the second sealing member 320. The second sealing member 320 moves closer to the first mechanical structure 100, maintaining contact with it, thus ensuring the sealing effect of the sealing structure 300.

[0077] It should be noted that the first direction X is the direction of compression, and the second direction Y is the direction in which the second mechanical structure 200 deforms and moves away from the first mechanical structure 100. The first direction X and the second direction Y are intersecting. The angle between the first direction X and the second direction Y can be arbitrary. For example, the angle between the first direction X and the second direction Y can be 15°, 30°, 45°, 60°, 90°, 120°, 150°, etc. This application embodiment does not limit the specific angle between the first direction X and the second direction Y, nor is it limited to the above examples.

[0078] The following explanation uses an example where the angle between the first direction X and the second direction Y is 90°, meaning that the first direction X and the second direction Y are set perpendicularly.

[0079] It is understandable that when the force-receiving end A of the elastic part 311 is subjected to force along the first direction X, the force-receiving end A bends in the first direction X and squeezes the second seal 320, and the second seal 320 moves under the squeezing action.

[0080] It should be noted that when the force-receiving end A of the elastic part 311 is subjected to force along the first direction X, the force-receiving end A and the surface of the second sealing member 320 facing the elastic part 311 together form a sealing surface, which at least abuts against a portion of the surface of the second mechanical structure 200 exposed at the opening. For example, when the force-receiving end A is not in contact with the first mechanical structure 100, both ends of the second sealing member 320 abut against the first mechanical structure 100 and the second mechanical structure 200, respectively; when the force-receiving end A abuts against the first mechanical structure 100, the first sealing member 310 abuts against the first mechanical structure 100, and both ends of the second sealing member 320 abut against both the first sealing member 310 and the second mechanical structure 200, respectively.

[0081] It is understood that the active space 301 formed by the first seal 310 and the first mechanical structure 100 has a guiding function so that the second seal 320 can move along the second direction Y under the action of compression.

[0082] It should be noted that when the force-bearing end A deforms under stress, the second seal 320 can be subjected to force and move only along the second direction Y, or it can move simultaneously along both the first direction X and the second direction Y. In this embodiment, the second seal 320 moves simultaneously along both the first direction X and the second direction Y.

[0083] With the above configuration, when the second mechanical structure 200 deforms, a gap is easily generated between the second mechanical structure 200 and the first mechanical structure 100. The force-bearing end A of the elastic part 311 is compressed and undergoes elastic deformation, allowing the force-bearing end A to compress the second sealing member 320 and move it, thereby ensuring that the second sealing member 320 remains in contact with the second mechanical structure 200. Thus, when a gap is generated between the first mechanical structure 100 and the second mechanical structure 200, the second sealing member 320 can simultaneously approach the second mechanical structure 200 and move at least along the second direction Y, ensuring that the first mechanical structure 100 and the second mechanical structure 200 remain in contact. This prevents the gap caused by the deformation of the second mechanical structure 200 from affecting the sealing effect of the sealing structure 300, ensuring the normal operation of the sealing structure 300.

[0084] As an optional implementation method, refer to the appendix. Figure 4 - Appendix Figure 12 As shown, the first seal 310 also includes a fixing part 312, which is connected to the side of the elastic part 311 away from the force-bearing end A. The elastic part 311 extends along the second direction Y, and the fixing part 312 extends along the first direction X. The fixing part 312 is used to abut against the first mechanical structure 100. The elastic part 311 and the fixing part 312 are used together with the first mechanical structure 100 to form an active space 301.

[0085] It should be noted that the force-receiving end A of the elastic part 311 is close to the opening of the sealing cavity 101, that is, the force-receiving end A is close to the orifice of the opening, and the first sealing member 310 abuts against the second mechanical structure 200. In this way, when a gap is generated between the first mechanical structure 100 and the second mechanical structure 200, the force-receiving end A can squeeze the second sealing member 320 and keep the second sealing member 320 abutting against the second mechanical structure 200.

[0086] With the above configuration, the fixing part 312 is connected to the elastic part 311 to improve the structural strength of the elastic part 311. This can prevent the elastic part 311 from deforming too much and detaching from the first mechanical structure 100, which would easily cause a gap between the elastic part 311 and the first mechanical structure 100, thus failing to guarantee the sealing effect of the sealing structure 300.

[0087] It should be noted that the fixing part 312 and the elastic part 311 can be an integral part. In this way, the first sealing member 310 has high structural strength and structural stability, which is conducive to ensuring the normal operation of the sealing structure 300.

[0088] As an optional implementation method, refer to the appendix. Figure 1 - Appendix Figure 12 As shown, the surface of the elastic part 311 near the movable space 301 is connected to the surface of the fixed part 312 near the movable space 301, together forming a guide surface 302 for guiding the movement of the second seal 320. The guide surface 302 can be used to guide the movement of the second seal 320.

[0089] In some embodiments, refer to the appendix Figure 1 - Appendix Figure 6 Appendix Figure 7 - Appendix Figure 12 As shown, the guide surface 302 is curved and recessed in the direction away from the active space 301. In this way, when the force-bearing end A of the elastic part 311 undergoes elastic deformation and compresses the second seal 320, the guide surface 302 can better disperse the reaction force of the second seal 320, making the force distribution of the elastic part 311 and the fixing part 312 more uniform, which can improve the structural stability of the first seal 310.

[0090] In other embodiments, refer to the appendix. Figure 6The guide surface 302 shown is an inclined plane with a first end 3021 and a second end 3022 facing each other. Along the second direction Y, the second end 3022 is located on the side of the first end 3021 away from the fixing part 312. Along the first direction X, the second end 3022 is located on the side of the first end 3021 closer to the force-bearing end A. Thus, when the force-bearing end A of the elastic part 311 undergoes elastic deformation and compresses the second seal 320, the movement speed of the second seal 320 is relatively stable, and the speed of the second seal 320 is the same at different positions on the guide surface 302, which can avoid the sealing effect being affected by the unstable movement speed of the second seal 320.

[0091] With the above configuration, the guide surface 302 can guide the movement of the second seal 320 to prevent it from deviating from its correct position. This allows the second seal 320 to move more stably, achieving a more stable sealing effect.

[0092] As an optional implementation method, refer to the appendix. Figure 1 - Appendix Figure 12 The guide surface 302 shown has a starting position and an ending position that are set opposite to each other. The first end 3021 forms the starting position and the second end 3022 forms the ending position. That is, the starting position is exactly the same as the first end 3021 and the ending position is exactly the same as the second end 3022. The starting position and the ending position can be located at opposite ends of the guide surface 302.

[0093] Understandably, refer to the appendix Figure 1 - Appendix Figure 4 As shown, when the second seal 320 is in the initial position, the first mechanical structure 100 and the second mechanical structure 200 remain in contact. At this time, the force-bearing end A of the elastic part 311 is in contact with the second mechanical structure 200. The elastic part 311 does not undergo elastic deformation. The side surface of the elastic part 311 away from the second seal 320 along the first direction X forms a sealing surface, which can achieve the sealing between the first mechanical structure 100 and the second mechanical structure 200.

[0094] Further, refer to the appendix Figure 5 As shown, when the second seal 320 is in the termination position, the second mechanical structure 200 deforms, and a gap is formed between the first mechanical structure 100 and the second mechanical structure 200. The force-bearing end A of the elastic part 311 is compressed, causing the second seal 320 to be displaced, and the second seal 320 can remain in contact with the second mechanical structure 200.

[0095] It should be noted that, referring to the appendix Figure 1 - Appendix Figure 4As shown, when the second seal 320 is in the initial position, the two ends of the elastic part 311 abut against the first mechanical structure 100 and the second mechanical structure 200 respectively, and the elastic part 311 forms a seal between the first mechanical structure 100 and the second mechanical structure 200; at this time, the second seal 320 is located in the movable space 301 and abuts against the second mechanical structure 200, which can further enhance the sealing effect of the elastic part 311; the fixed part 312 is used to work with the elastic part 311 to realize the movable space 301, so as to ensure that the second seal 320 can abut against the second mechanical structure 200.

[0096] See attached document Figure 5 As shown, when the second seal 320 is in the terminated position, the two ends of the elastic part 311 abut against the first mechanical structure 100 and the second seal 320 respectively, and the second seal 320 abuts against the second mechanical structure 200. The elastic part 311 and the second seal 320 together form a seal between the first mechanical structure 100 and the second mechanical structure 200. The fixing part 312 is used to form an active space 301 together with the elastic part 311 to ensure that the second seal 320 can abut against the second mechanical structure 200.

[0097] With the above configuration, the first sealing member 310 forms a guide surface 302 for guiding the movement of the second sealing member 320 through the elastic part 311 and the fixing part 312. The guide surface 302 can ensure that the second sealing member 320 keeps in contact with the first sealing member 310 and the second mechanical structure 200 respectively, thereby enabling the sealing structure 300 to achieve a seal between the first mechanical structure 100 and the second mechanical structure 200.

[0098] As an optional implementation, a protrusion (not shown in the figure) is also included.

[0099] In some embodiments, a protrusion is disposed on the guide surface 302, protruding toward the movable space 301, and is used to contact the second seal 320. It is understood that the protrusion can be integral with the first seal 310, thus the first seal 310 has higher structural strength and better structural stability, and can better abut against the second seal 320.

[0100] In some embodiments, a protrusion is provided on the outer surface of the second seal 320, and the protrusion is used to contact the guide surface 302. It is understood that the protrusion can be integral with the second seal 320, so that the first seal 310 has higher structural strength and better structural stability, and can better abut against the second seal 320.

[0101] In some embodiments, some protrusions may be provided on the guide surface 302, and other protrusions may be provided on the outer surface of the second seal 320. That is, both the first seal 310 and the second seal 320 have the above-mentioned protrusions. In this way, the friction between the first seal 310 and the second seal 320 is high, which can better ensure the sealing effect of the sealing structure 300.

[0102] Understandably, the protrusion can increase the contact area between the second seal 320 and the first seal 310, thereby increasing the friction between the second seal 320 and the first seal 310 and enhancing the sealing effect.

[0103] It should be noted that the material used to make the protrusion can be arbitrary. For example, the material can be rubber, plastic, metal, etc. This application does not limit the material used to make the protrusion, nor is it limited to the above examples. The shape and size of the protrusion can also be arbitrary. For example, along the direction of the first sealing member 310 near the second sealing member 320, the cross-sectional shape of the protrusion can be triangular, fan-shaped, quadrilateral, etc. This application does not limit the specific shape of the protrusion, nor is it limited to the above examples.

[0104] By setting the aforementioned protrusions, the friction between the first seal 310 and the second seal 320 is higher, which can better ensure the sealing effect of the sealing structure 300. If the first seal 310 has the aforementioned protrusions, the first seal 310 has higher structural strength and better structural stability, which can better abut against the second seal 320 to ensure the sealing effect of the sealing structure 300. If the second seal 320 has the aforementioned protrusions, the second seal 320 has higher structural strength and better structural stability, which can better abut against the first seal 310 to ensure the sealing effect of the sealing structure 300.

[0105] As an optional implementation method, refer to the appendix. Figure 6 - Appendix Figure 12 As shown, the second seal 320 is annular and is fitted onto at least a portion of the first seal 310; the cross-section of the second seal 320 is circular along a circumferential section perpendicular to the second seal 320; the cross-section of the first seal 310 is circular along the annular surface of the second seal 320.

[0106] It should be noted that the second sealing element 320 can be fitted onto the first sealing element 310. For example, along the second direction Y, the size of the second sealing element 320 is smaller than that of the first sealing element 310, so that the second sealing element 320 can fit over a portion of the first sealing element 310; in another example, along the second direction Y, the size of the second sealing element 320 is larger or smaller than that of the first sealing element 310, so that the second sealing element can fit over the entire first sealing element 310. The embodiments of this application do not limit the specific positional relationship between the second sealing element 320 and the first sealing element 310, nor are they limited to the above examples.

[0107] The following description uses the example of the second seal 320 being fitted onto a portion of the first seal 310.

[0108] By setting the first sealing element 310 with the above structure, it can be adapted to the sealing cavity 101 with multiple openings, that is, the sealing between the first mechanical structure 100 and multiple second mechanical structures 200 can be completed, which can reduce costs and improve the user experience.

[0109] Furthermore, by providing an annular second seal 320, when the elastic part 311 of the first seal 310 squeezes the second seal 320, different positions of the second seal 320 can move synchronously to abut against the second mechanical structure 200, thereby achieving a seal between the first mechanical structure 100 and the second mechanical structure 200 by the sealing structure 300.

[0110] As an optional implementation method, refer to the appendix. Figure 6 - Appendix Figure 12 As shown, along the second direction Y, the center of the force-receiving end A has a groove 313, and the opening of the groove 313 is located on the end face of the force-receiving end A. In this way, when the elastic part 311 is compressed, the pressure along the second direction Y can be more evenly distributed to a portion of the elastic part 311 around the groove 313, thereby improving the uniformity of deformation at different positions of the elastic part 311. This is beneficial to improving the movement accuracy of the second seal 320, making the second seal 320 abut against the second mechanical structure 200 more accurately, and thus improving the sealing effect of the sealing structure 300 between the first mechanical structure 100 and the second mechanical structure 200.

[0111] In this groove, the opening size of the groove 313 gradually decreases from the groove opening to the bottom. That is, the surface extension direction of the groove wall of the groove 313 intersects the second direction Y and the first direction X. In this way, the groove wall of the groove 313 can change the pressure direction while dispersing the pressure magnitude. For example, the pressure along the second direction Y can be dispersed into a force towards the first direction X, so that the elastic part 311 can deform as much as possible along the first direction X, so as to better drive the second seal 320 to move along the first direction X.

[0112] By providing an elastic part 311 with the aforementioned groove 313, the pressure can be distributed more evenly to ensure the structural stability of the elastic part 311 and the first seal 310, so as to ensure the normal operation of the sealing structure 300; the pressure direction can be changed so that the elastic part 311 can more easily squeeze the second seal 320, so that the second seal 320 can abut against the first seal 310 and the second mechanical structure 200, thereby achieving the sealing of the sealing structure 300.

[0113] As an optional implementation method, refer to the appendix. Figure 12 As shown, the sealing structure 300 also includes an elastic member 330 extending along the second direction Y. One end of the elastic member 330 abuts against the first mechanical structure 100, and the other end is located at the groove 313 of the elastic portion 311 and abuts against the force-bearing end A. In this way, the elastic member 330 can apply pressure to the elastic portion 311, causing the elastic portion 311 to deform, thereby causing the elastic portion 311 to compress the second sealing member 320, thus achieving the sealing of the sealing structure 300.

[0114] It should be noted that the pressure on the elastic part 311 may come only from the elastic element 330, or only from the fluid medium, or may be related to both the elastic element 330 and the fluid medium.

[0115] The embodiments of this application do not limit the source of pressure on the elastic part 311, nor are they limited to the examples described above.

[0116] The following explanation uses an example where the pressure on the elastic part 311 is related to both the elastic element 330 and the fluid medium. Specifically, when the second mechanical structure 200 deforms and a gap is formed between it and the first mechanical structure 100, a fluid medium with high pressure enters the gap and compresses the elastic part 311 of the first sealing element 310. Simultaneously, the elastic element 330, which abuts against the elastic part 311 and the first mechanical structure 100, ensures that along the second direction Y, the end of the first sealing element 310 facing away from the elastic part 311 abuts against the first mechanical structure 100, thus ensuring that the second sealing element 320 can abut against both the first sealing element 310 and the second mechanical structure 200, thereby achieving a seal between the first mechanical structure 100 and the second mechanical structure 200.

[0117] It is understood that the elastic element 330 can be any elastic structure or material. For example, the elastic element 330 can be a spring, rubber, etc. The embodiments of this application do not limit the specific structure or material of the elastic element 330, nor are they limited to the above examples.

[0118] The following explanation uses the elastic element 330 as an example of a spring.

[0119] Furthermore, along the second direction Y, the orthographic projection of the elastic member 330 on the force-bearing end A covers the opening of the groove 313. This allows the elastic member 330 to cover the opening of the groove 313 and directly contact the elastic part 311, thereby better abutting against the elastic part 311 and improving the connection stability between the elastic member 330 and the elastic part 311.

[0120] In the description of the embodiments of this application, it should be understood that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, the connection of internal structures of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0121] The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this application, "multiple" means two or more, unless otherwise precisely specified.

[0122] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0123] 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 the structural or full structural 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 sealing structure, characterized in that, For sealing between a first mechanical structure and a second mechanical structure, the sealing structure includes a first sealing element and a second sealing element, the first sealing element is used to form an active space for the second sealing element to move together with the first mechanical structure; the second sealing element is movably disposed in the active space and maintains contact with the first sealing element, the first sealing element includes an elastic portion. The sealing structure is configured such that when the second mechanical structure deforms, and the force-bearing end of the elastic part is pressed along the first direction and undergoes elastic deformation, the second seal is pressed and moves at least along the second direction, and the second seal at least remains in contact with the second mechanical structure, wherein the first direction intersects the second direction; The first sealing member further includes a fixing part, which is connected to the side of the elastic part away from the force-bearing end. The elastic part extends along the second direction, and the fixing part extends along the first direction. The fixing part is used to abut against the first mechanical structure. The elastic part and the fixing part are used together with the first mechanical structure to form the active space. The surface of the elastic part near the movable space is connected to the surface of the fixed part near the movable space, together forming a guide surface for guiding the movement of the second seal; The guide surface is a curved surface, and the guide surface is recessed in the direction away from the active space; or, the guide surface is an inclined plane, and the inclined plane has a first end and a second end opposite to each other. Along the second direction, the second end is located on the side of the first end away from the fixing part, and along the first direction, the second end is located on the side of the first end closer to the force-bearing end. Along the second direction, the center of the force-receiving end has a groove, and the opening of the groove is located on the end face of the force-receiving end; Along the direction from the groove opening to the bottom of the groove, the opening size of the groove gradually decreases.

2. The sealing structure according to claim 1, characterized in that, The guide surface has a starting position and an ending position that are set opposite to each other, with the first end forming the starting position and the second end forming the ending position. When the second seal is in the starting position, along the first direction, the orthographic projection of the second seal on the surface where the force-bearing end is located is covered by the force-bearing end.

3. The sealing structure according to claim 1, characterized in that, It also includes protrusions; The protrusion is disposed on the guide surface, the protrusion protrudes in the direction toward the active space, and the protrusion is used to contact the second seal; And / or, the protrusion is provided on the outer surface of the second seal, and the protrusion is used to contact the guide surface.

4. The sealing structure according to any one of claims 1-3, characterized in that, The second seal is annular and is fitted over at least a portion of the first seal; the cross-section of the second seal is circular along a circumferential section perpendicular to the second seal. The cross-section is along the circumferential surface of the second seal, and the cross-section of the first seal is circular.

5. The sealing structure according to any one of claims 1-3, characterized in that, It also includes an elastic member extending along the second direction, one end of which abuts against the first mechanical structure, and the other end is located at the groove of the elastic part and abuts against the force-bearing end. Along the second direction, the orthographic projection of the elastic element on the force-bearing end covers the groove opening.

6. A mechanical device, characterized in that, It includes a first mechanical structure, a second mechanical structure, and a sealing structure as described in any one of claims 1-5; The first mechanical structure has a sealing cavity for placing the sealing structure, the sealing cavity having an opening, and the second mechanical structure covering the opening; the two ends of the first sealing member of the sealing structure respectively abut against the cavity wall of the sealing cavity and the second mechanical structure covering the opening.

7. The mechanical device according to claim 6, characterized in that, The number of openings is multiple, and each opening corresponds to a different position of the second sealing element of the sealing structure. The number of second mechanical structures is multiple. Each of the multiple second mechanical structures corresponds to one of the multiple openings and covers the corresponding opening.

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