Sealing assembly and sealing device

Abstract

The invention discloses a sealing assembly and a sealing device. The sealing assembly comprises an annular supporting piece and an annular wrapping piece. The annular supporting piece comprises a first surface, a second surface and an inner circumferential surface, the first surface is opposite to the second surface, the inner circumferential surface is connected with the first surface and the second surface, the first surface and / or the second surface are / is provided with a connecting part, and a first cavity is defined by the inner circumferential surface; the annular wrapping piece is arranged on the first surface, the second surface and the inner circumferential surface, a mounting hole is formed in the annular wrapping piece, in an orthographic projection perpendicular to the first surface or the second surface, the mounting hole and the connecting part are at least partially overlapped, and the elastic modulus of the annular wrapping piece is smaller than that of the annular supporting piece. According to the sealing assembly, the annular supporting piece and the annular wrapping piece which are combined in a soft and hard mode are adopted, so that one sealing assembly can achieve two-way sealing, the flexible annular wrapping piece can automatically compensate part machining errors in the installation process, and sealing failure caused by the fact that the relative positions of the sealing assembly and other parts are changed can be avoided.

Description

Technical Field

[0001] This invention relates to the field of sealing technology, and more specifically to a sealing component and sealing device. Background Technology

[0002] Currently, most sealing designs on the market use O-rings. If the sealing gap is too large, or the geometric accuracy of the parts is insufficient (such as roundness or cylindricity exceeding tolerance), the O-ring is easily squeezed into the gap under pressure. Moreover, the sealing performance of the O-ring is limited by factors such as material, pressure, and temperature. A single sealing ring is difficult to meet the requirements of complex working conditions, which results in the generally poor sealing effect of existing sealing components. Summary of the Invention

[0003] The purpose of this invention is to provide a sealing component and sealing device to solve the problem of the generally poor sealing effect of the sealing component.

[0004] To achieve the objectives of this invention, the following technical solution is provided: In a first aspect, the present invention provides a sealing assembly, comprising: An annular support member includes a first surface, a second surface, and an inner circumferential surface. The first surface and the second surface are opposite to each other. The inner circumferential surface connects the first surface and the second surface. The first surface and / or the second surface are provided with connecting portions. The inner circumferential surface encloses and forms a first cavity. An annular covering is disposed on the first surface, the second surface, and the inner circumferential surface. The annular covering has a mounting hole. In an orthographic projection perpendicular to the first surface or the second surface, the mounting hole at least partially overlaps with the connecting portion. The elastic modulus of the annular covering is less than the elastic modulus of the annular support.

[0005] In one embodiment, the annular support includes a first annular portion and a second annular portion that are movable relative to each other in a first direction, the annular covering connects the first annular portion and the second annular portion, and the first surface is the surface of the first annular portion facing away from the second annular portion.

[0006] In one embodiment, the thickness of the first annular portion in the first direction is d1, and the distance between the first annular portion and the second annular portion in the first direction is d2, satisfying: 1≤d1 / d2≤1.5.

[0007] In one embodiment, the annular covering includes a first annular plate, a second annular plate, and a third annular plate connected in sequence. The first annular portion has a first inner circumferential surface, and the second annular portion has a second inner circumferential surface. The first annular plate is disposed on the first surface, and the second annular plate is disposed corresponding to the first inner circumferential surface and the second inner circumferential surface. The second annular plate is deformable in the first direction, and the third annular plate is disposed on the second surface. Both the first annular portion and the second annular portion have the connecting portion, and both the first annular plate and the second annular plate have the mounting hole.

[0008] In one embodiment, there are multiple first mounting portions, and the multiple first mounting portions are disposed on the first inner peripheral surface and / or the second inner peripheral surface; Wherein, the first mounting part is a groove with an opening facing the first annular plate and / or the second annular plate, and the second mounting part is correspondingly protruding from the first annular plate or the second annular plate, with each of the second mounting parts extending into the first mounting part. And / or, the second mounting portion is a groove with an opening facing the first inner circumferential surface and / or the second inner circumferential surface, the first mounting portion protrudes from the first inner circumferential surface and / or the second inner circumferential surface, and the first mounting portion extends into the second mounting portion in a corresponding manner.

[0009] In one embodiment, the second annular plate includes a first part, a second part, and a third part connected sequentially in the first direction. The first part corresponds to the first inner circumferential surface, and the third part corresponds to the second inner circumferential surface. The second part is disposed at the interval between the first annular part and the second annular part. The interval between the second part and the annular support member first increases and then decreases along the direction from the first part to the third part.

[0010] In one embodiment, the first part has a first sealing groove at its end near the second part, and the first sealing groove extends along the first inner circumferential surface; and / or, the third part has a second sealing groove at its end near the second part, and the second sealing groove extends along the second inner circumferential surface.

[0011] In one embodiment, the sealing assembly further includes a first sealing lip disposed on the surface of the first annular plate facing away from the third annular plate and the surface of the third annular plate facing away from the first annular plate.

[0012] In one embodiment, the width of the first sealing lip is d1, which satisfies: d1≥1mm; And / or, the lip angle of the first sealing lip is 30°-45°.

[0013] In one embodiment, there are multiple first sealing lips, which extend circumferentially along the annular support and are spaced apart on the surface of the annular support. The mounting hole is located between two adjacent first sealing lips.

[0014] In one embodiment, the sealing assembly further includes a second sealing lip disposed on the surface of the first annular plate facing away from the third annular plate, the second sealing lip connecting two adjacent first sealing lips, and the first sealing lips and the second sealing lip surrounding the mounting hole.

[0015] In one embodiment, the annular support has a through hole to form the connecting portion, and the annular support further includes a mating portion that is received within the connecting portion.

[0016] In one embodiment, the first surface and / or the second surface are provided with snap-fit ​​grooves, and the annular cover is embedded in the snap-fit ​​grooves.

[0017] In one embodiment, the annular support and the annular covering are integral components.

[0018] In a second aspect, the present invention provides a sealing device, comprising a housing, a connector, and a sealing assembly as described in any of the various embodiments of the first aspect, wherein the connector is connected to the connecting portion, the outer peripheral surface of the sealing assembly and the inner wall surface of the housing enclose a second cavity, and the sealing assembly separates the first cavity and the second cavity.

[0019] The sealing assembly of this invention employs a combination of a rigid and a flexible annular support and annular covering, enabling bidirectional sealing. The relatively large sealing surfaces of the annular covering and support improve the sealing performance. Furthermore, the annular covering, with its lower elastic modulus, automatically compensates for machining errors (such as groove size deviations and surface roughness) and assembly errors (such as installation tilt) during installation, ensuring a consistent seal. In dynamic sealing, the annular covering absorbs vibration and impact, preventing wear or failure of the sealing surface due to rigid collisions. Additionally, the connecting portion in the annular support prevents changes in the relative position of the sealing assembly and other components from causing sealing failure. Therefore, the sealing assembly of this invention offers excellent sealing performance. Simultaneously, the connection and fixing of the first and second mounting portions strengthen the structure of the annular support and covering, improving the overall strength of the sealing assembly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a sealing assembly according to one embodiment; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is an exploded view of a sealing assembly according to one embodiment; Figure 4 This is a perspective view of a sealing assembly according to another embodiment; Figure 5 This is a top view of a sealing assembly according to one embodiment; Figure 6 yes Figure 5 Sectional view at point AA; Figure 7 yes Figure 5 Sectional view at point BB; Figure 8 This is a perspective view of some components of a sealing device according to one embodiment.

[0022] Explanation of reference numerals in the attached figures: 100-Sealing assembly, 10-Annular support, 111-First surface, 112-Second surface, 113-Inner circumferential surface, 12-Connecting part, 13-First annular part, 131-First inner circumferential surface, 14-Second annular part, 141-Second inner circumferential surface, 15-Snap-fit ​​groove, 20-Annular covering, 21-Mounting hole, 22-First annular plate, 23-Second annular plate, 231-First part, 232-Second part, 233-Third part, 234-First sealing groove, 235-Second sealing groove, 24-Third annular plate, 30-First sealing lip, 40-Second sealing lip, 50-Mating part, 60-First mounting part, 70-Second mounting part, 200-Connecting part, 210-First cavity, 220-Second cavity, 300-Box body, Z-First direction. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0025] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] Please refer to Figures 1 to 7 This invention provides a sealing assembly 100, including an annular support member 10 and an annular covering member 20. Specifically, the inner walls of the annular support member 10 and the annular covering member 20 are connected end-to-end in annular shapes. The annulus can be circular, elliptical, polygonal, or a polygonal curved surface, etc., without limitation. The outer wall of the annular covering member 20 protrudes from the outer wall of the annular support member 10, or the outer wall of the annular covering member 20 is flush with the outer wall of the annular support member 10. The connection between the annular covering member 20 and the annular support member 10 can be adhesive, magnetic, snap-fit, screwed, etc., without limitation.

[0028] Please refer to Figure 1 , Figure 3 , Figure 5 and Figure 6The annular support 10 includes a first surface 111, a second surface 112, and an inner circumferential surface 113. The first surface 111 and the second surface 112 are opposite to each other, and the inner circumferential surface 113 connects the first surface 111 and the second surface 112. The first surface 111 and / or the second surface 112 are provided with connecting portions 12. The first surface 111 and the second surface 112 are opposite to each other in a first direction Z, which can be the axial direction of the annular support 10. Multiple connecting portions 12 are provided, spaced apart circumferentially from the annular support 10. The connecting portions 12 on the first surface 111 can correspond to the connecting portions 12 on the second surface 112, or connecting portions 12 can be provided only on the first surface 111 or the second surface 112. The connecting portions 12 can protrude from or pass through the first surface 111 or the second surface 112, without limitation. The annular support 10 can be a flexible or rigid member, without limitation. The material of the annular support 10 can be PP (polypropylene), PA (polyamide / nylon), PPS (polyphenylene sulfide), PEEK (polyether ether ketone), PTFE (polytetrafluoroethylene), alloy steel, etc., without limitation. The radial dimensions of the annular support 10 are approximately uniform at all points. The inner circumferential surface 113 encloses and forms the first cavity 210.

[0029] Please refer to Figure 1 , Figure 3 , Figure 5 and Figure 6 An annular covering 20 is disposed on a first surface 111, a second surface 112, and an inner circumferential surface 113. The annular covering 20 has a mounting hole 21, which corresponds to the connecting portion 12. The connecting portion 12 is exposed through the mounting hole 21. The elastic modulus of the annular covering 20 is less than that of the annular support 10. The annular covering 20 is a flexible component. The cross-sectional shape of the mounting hole 21 can be circular, elliptical, rectangular, etc., without limitation. The hardness of the annular covering 20 is less than that of the annular support 10. The material of the annular covering 20 can be silicone, rubber, TPU (thermoplastic polyurethane elastomer), TPE (thermoplastic elastomer), polyurethane foam, EVA (ethylene-vinyl acetate copolymer), fluororubber, EPDM (ethylene propylene diene monomer rubber), etc., without limitation. In the orthographic projection in a direction perpendicular to the first surface 111 or the second surface 112, the connecting portion 12 and the mounting hole 21 at least partially overlap.

[0030] The inner circumferential surface 113 facing the annular covering 20 has a first mounting portion 60, and the annular covering 20 also includes a second mounting portion 70. The first mounting portion 60 and the second mounting portion 70 are connected and fixed together. The first mounting portion 60 and the inner circumferential surface 113 are integral components. The connection method between the first mounting portion 60 and the second mounting portion 70 can be snap-fit, magnetic connection, adhesive, etc., without limitation.

[0031] The sealing assembly 100 of the present invention employs a combination of a soft and rigid annular support 10 and an annular covering 20, enabling bidirectional sealing. The larger sealing surfaces of the annular covering 20 and the annular support 10 improve the sealing performance of the sealing assembly 100. Furthermore, the annular covering 20, with its lower elastic modulus, automatically compensates for machining errors (such as groove size deviations and surface roughness) and assembly errors (such as installation tilt) during installation, ensuring the sealing surfaces remain in contact. In dynamic sealing, the annular covering 20 absorbs vibration and impact, preventing wear or failure of the sealing surfaces due to rigid collisions. Additionally, the annular support 10 of the present invention is provided with a connecting portion 12, preventing changes in the relative position of the sealing assembly 100 with other components that could cause sealing failure. Therefore, the sealing assembly 100 of the present invention has excellent sealing performance. Simultaneously, the connection and fixing of the first mounting portion 60 and the second mounting portion 70 strengthens the structural strength of the annular support 10 and the annular covering 20, improving the service strength of the sealing assembly 100.

[0032] Please refer to Figure 1 and Figure 3 In one embodiment, the annular support 10 includes a first annular portion 13 and a second annular portion 14 that are movable relative to each other in a first direction Z. An annular covering 20 connects the first annular portion 13 and the second annular portion 14. The first surface 111 is the surface of the first annular portion 13 facing away from the second annular portion 14, and the second surface 112 is the surface of the second annular portion 14 facing away from the first annular portion 13.

[0033] Optionally, the materials of the first annular portion 13 and the second annular portion 14 may be the same or different, without limitation.

[0034] Optionally, the shapes of the first annular portion 13 and the second annular portion 14 may be exactly the same or may have slight differences, without limitation.

[0035] Optionally, the annular covering 20 is also disposed on the surface of the first annular portion 13 facing the second annular portion 14, and / or, the annular covering 20 is also disposed on the surface of the second annular portion 14 facing the first annular portion 13.

[0036] Optionally, the thickness of the first annular portion 13 in the first direction Z is approximately uniform, and the thickness of the second annular portion 14 in the second direction is approximately uniform.

[0037] Optionally, the surface of the first annular portion 13 facing the second annular portion 14 and / or the surface of the second annular portion 14 facing the first annular portion 13 are provided with snap-fit ​​portions. The snap-fit ​​portions can be protruding structures or groove structures, and there can be one or more snap-fit ​​portions. Multiple snap-fit ​​portions are spaced apart on the first annular portion 13 and / or the second annular portion 14. The annular cover 20 is connected to the snap-fit ​​portions to strengthen the connection strength between the annular cover 20 and the first annular portion 13 and the second annular portion 14, thereby improving the structural strength of the sealing assembly 100.

[0038] The annular support 10 is configured with two spaced-apart first annular portions 13 and second annular portions 14, which provides a certain buffering effect during installation and use. The floating first annular portions 13 and second annular portions 14 ensure that the sealing surface is always in close contact with the interface to be sealed, while the spaced-apart first annular portions 13 and second annular portions 14 can absorb the tolerance of assembly deformation. The spaced-apart first annular portions 13 and second annular portions 14 make the sealing assembly 100 highly flexible and applicable to various working conditions such as high and low speed movement and static conditions.

[0039] Please refer to Figures 1 to 6 In one embodiment, the annular covering 20 includes a first annular plate 22, a second annular plate 23, and a third annular plate 24 connected in sequence. The first annular portion 13 has a first inner circumferential surface 131, and the second annular portion 14 has a second inner circumferential surface 141. The first annular plate 22 is disposed on the first surface 111, and the second annular plate 23 is disposed corresponding to the first inner circumferential surface 131 and the second inner circumferential surface 141. The second annular plate 23 is deformable in the first direction Z. The third annular plate 24 is disposed on the second surface 112. Both the first annular portion 13 and the second annular portion 14 have a connecting portion 12, and both the first annular plate 22 and the second annular plate 23 have mounting holes 21.

[0040] Optionally, the connection relationship between the first annular plate 22 and the first surface 111, the second annular plate 23 and the inner circumferential surface 113, and the third annular plate 24 and the second surface 112 can be adhesive, magnetic attraction, snap-fit, screw connection, etc., without limitation.

[0041] Optionally, the second annular plate 23 can be compressed or extended in the first direction Z, without limitation.

[0042] Optionally, the first annular plate 22 and the third annular plate 24 protrude from the outer peripheral surfaces of the first annular portion 13 and the second annular portion 14 on the side opposite to the second annular plate 23.

[0043] Optionally, the mounting holes 21 of the first annular plate 22 and the second annular plate 23 can be set one-to-one, or at least partially corresponding, or spaced apart in the first direction Z, without limitation.

[0044] The first annular plate 22, the second annular plate 23, and the third annular plate 24 respectively cover the first surface 111, the inner circumferential surface 113, and the second surface 112, forming a three-dimensional support structure. This arrangement enhances the overall resistance to deformation by dispersing the stress points. Under mechanical vibration or external impact, the three-point support can effectively reduce local stress concentration and prevent the single plate from breaking due to uneven stress. The connecting part 12 of the first annular part 13 and the second annular part 14 is fixed to the plate through the mounting hole 21 to form a rigid connection, which improves the bonding strength of the sealing assembly 100 and can further disperse the load through the structure of the annular part, ensuring the stability of the sealing assembly 100 under complex working conditions.

[0045] Please refer to Figure 3 In one embodiment, there are multiple first mounting portions 60, and the multiple first mounting portions 60 are disposed on the first inner peripheral surface 131 and / or the second inner peripheral surface 141. Wherein, the first mounting part 60 is a groove with an opening facing the first annular plate 22 and / or the second annular plate 23, and the second mounting part 70 is correspondingly protruding from the first annular plate 22 or the second annular plate 23, and the second mounting part 70 extends into the first mounting part 60 in a corresponding manner. And / or, the second mounting portion 70 is a groove with an opening facing the first inner peripheral surface 131 and / or the second inner peripheral surface 141, and the first mounting portion 60 protrudes from the first inner peripheral surface 131 and / or the second inner peripheral surface 141, with the first mounting portion 60 extending into the second mounting portion 70 in a corresponding manner.

[0046] Optionally, when the first mounting part 60 and the second mounting part 70 are grooves, the shape of the corresponding groove can be a circular groove, an elliptical groove, a waist-shaped groove, a dovetail groove, etc., without limitation. The shapes of the first mounting part 60 and the second mounting part 70 are set in a one-to-one correspondence.

[0047] Optionally, the first mounting part 60 and the second mounting part 70 can be an interference fit.

[0048] Optionally, a plurality of first mounting portions 60 are spaced apart in the circumferential direction of the first and second mounting portions 70 on the inner circumferential surface 113.

[0049] The first mounting portion 60 and the second mounting portion 70, which are connected and fixed, can strengthen the structural strength of the annular support 10 and the annular covering 20, and improve the service strength of the sealing assembly 100.

[0050] In one embodiment, the thickness of the first annular portion 13 in the first direction Z is d1, and the distance between the first annular portion 13 and the second annular portion 14 in the first direction Z is d2, satisfying: 1≤d1 / d2≤1.5.

[0051] Optionally, d1 / d2 can be 1, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, etc., without restriction.

[0052] If d1 / d2 is too large or too small, the annular covering 20 provides poor support for the first annular portion 13 and the second annular portion 14, which may affect the structural stability of the sealing assembly 100. When d1 / d2 is moderate, the annular covering 20 provides stable support for the first annular portion 13 and the second annular portion 14, while the first annular portion 13 and the second annular portion 14 can also move in the first direction Z.

[0053] Please refer to Figure 1 , Figure 3 and Figure 6 In one embodiment, the second annular plate 23 includes a first part 231, a second part 232, and a third part 233 connected sequentially in the first direction Z. The first part 231 corresponds to the first inner circumferential surface 131, and the third part 233 corresponds to the second inner circumferential surface 141. The second part 232 is disposed at the interval between the first annular part 13 and the second annular part 14. The interval between the second part 232 and the annular support member 10 first increases and then decreases along the direction from the first part 231 to the third part 233.

[0054] Optionally, the second part 232 is a flexible component. Optionally, the first part 231, the second part 232, and the third part 233 are an integral structure, that is, the first part 231, the second part 232, and the third part 233 are an integral structure manufactured by an integral molding process. The integral molding process can be stamping, casting, etc., without limitation.

[0055] Optionally, the first part 231 and the first inner circumferential surface 131 can be connected or spaced apart, without restriction.

[0056] The spacing between the second part 232 and the annular support 10 increases and then decreases along the direction from the first part 231 to the third part 233, forming a gradient structure that is flexible in the middle and rigid at both ends. When an external load is applied, the stress is dispersed in the middle region of the second part 232 due to the increased spacing, avoiding local stress concentration. The two ends form a rigid connection with the first annular part 13 and the second annular part 14 due to the decreased spacing, effectively transmitting torque. The first part 231 and the first annular part 13, and the third part 233 and the second annular part 14 are fixed at two points. The second part 232, as a cantilever beam structure, provides additional support in the middle region through the annular support 10. In addition, when temperature changes cause thermal expansion and contraction of the material or when the first annular part 13 or the second annular part 14 floats up and down due to stress, the change in the spacing between the second part 232 and the annular support 10 can absorb deformation.

[0057] Please refer to Figure 3In one embodiment, a first sealing groove 234 is provided at the end of the first part 231 near the end of the second part 232, and the first sealing groove 234 extends along the first inner circumferential surface 131; and / or, a second sealing groove 235 is provided at the end of the third part 233 near the end of the second part 232, and the second sealing groove 235 extends along the second inner circumferential surface 141.

[0058] Optionally, both the first sealing groove 234 and the second sealing groove 235 are annular grooves connected end to end. There may be multiple first sealing grooves 234 and second sealing grooves 235, which are spaced apart in the first direction Z.

[0059] Optionally, the inner wall surfaces of the first sealing groove 234 and the second sealing groove 235 can be rectangular, trapezoidal, dovetail-shaped, etc., without restriction.

[0060] The first sealing groove 234 and the second sealing groove 235 are set to achieve a double-layer sealing effect, which effectively prevents further leakage of the medium and greatly improves the reliability of the seal.

[0061] Please refer to Figure 4 and Figure 6 In one embodiment, the sealing assembly 100 further includes a first sealing lip 30, which is disposed on the surface of the first annular plate 22 facing away from the third annular plate 24 and the surface of the third annular plate 24 facing away from the first annular plate 22.

[0062] Optionally, the width of the first sealing lip 30 is d1, satisfying: d1≥1mm. d1 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc., without limitation. The first sealing lip 30 that meets the width limit can prevent damage to the sealing assembly 100 due to excessive local pressure by dispersing contact stress.

[0063] Optionally, the lip angle of the first sealing lip 30 can be 30°-45°. Specifically, the lip angle of the first sealing lip 30 can be 30°, 32°, 35°, 38°, 40°, 42°, 45°, etc., without limitation. The first sealing lip 30 with a lip angle that meets this limitation can reduce frictional heat generation, and at the same time, through elastic deformation, the sealing assembly 100 can maintain effective sealing under axial runout. Furthermore, the first sealing lip 30 can also compensate for manufacturing errors of the mating surface through elastic deformation.

[0064] Optionally, the first sealing lip 30, the first annular plate 22, and the third annular plate 24 can be an integral structure, which can be formed by an integral molding method such as stamping, casting, or injection molding.

[0065] Optionally, there may be multiple first sealing lips 30, and the multiple first sealing lips 30 are spaced apart in the circumferential direction of the annular cover 20.

[0066] The first sealing lip 30, through elastic deformation, tightly adheres to the mating surface, forming a physical barrier to prevent leakage of liquids, gases, or solid particles. The first sealing lip 30, in conjunction with the first annular plate 22 and the third annular plate 24, increases the sealing strength of the sealing surface. The elastic design of the first sealing lip 30 also allows it to automatically adjust the contact pressure after installation misalignment or wear from long-term use, maintaining the sealing effect.

[0067] Please refer to Figure 1 and Figure 4 In one embodiment, there are multiple first sealing lips 30, which extend circumferentially along the annular support 10 and are spaced apart on the surface of the annular support 10. The mounting hole 21 is disposed between two adjacent first sealing lips 30.

[0068] Multiple first sealing lips 30 are spaced apart in the second direction, wherein the inner circumferential surface 113 and the outer circumferential surface of the annular support 10 are opposite each other in the second direction.

[0069] The annular gap design allows the first sealing lip 30 to conform to the sealing surface of complex curved surfaces (such as cylindrical, conical or spherical surfaces), avoiding local leakage caused by surface mismatch in traditional single-lip structures.

[0070] The annular first sealing lip 30 evenly distributes the medium pressure across the entire circumference, preventing tearing or detachment of the first sealing lip 30 due to stress concentration at a single point. The annularly spaced first sealing lips 30 form multiple sealing barriers, each lip independently bearing a portion of the sealing pressure. When external media (such as liquids, gases, or dust) attempt to intrude, they must successively overcome multiple lips, resulting in an exponential increase in resistance. The spacing between the first sealing lips 30 allows for elastic deformation of the lips under pressure, automatically adjusting the sealing gap. When equipment vibration or temperature changes cause micro-displacement of components, the lips of different first sealing lips 30 can fill the gap through deformation, maintaining the sealing effect.

[0071] Please refer to Figure 1 In one embodiment, the sealing assembly 100 further includes a second sealing lip 40, which is disposed on the surface of the first annular plate 22 facing away from the third annular plate 24. The second sealing lip 40 connects two adjacent first sealing lips 30, and the first sealing lips 30 and the second sealing lip 40 surround the mounting hole 21.

[0072] Optionally, the second sealing lip 40 can be straight, curved, or otherwise, without limitation.

[0073] Optionally, the width of the second sealing lip 40 is not less than 1 mm. Specifically, the width of the second sealing lip 40 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc., without limitation. The lip angle of the second sealing lip 40 can be 30°-45°. Specifically, the lip angle of the second sealing lip 40 can be 30°, 32°, 35°, 38°, 40°, 42°, 45°, etc., without limitation.

[0074] Optionally, the first sealing lip 30, the second sealing lip 40, and the annular covering 20 are an integral structure, which can be formed by casting, stamping, etc. The second sealing lip 40 forms a closed loop by connecting two adjacent first sealing lips 30, thereby enhancing the overall resistance to deformation.

[0075] Optionally, there may be multiple second sealing lips 40, which are spaced apart circumferentially on the annular cover 20. Specifically, the multiple second sealing lips 40 are equally spaced.

[0076] Optionally, one or more mounting holes 21 may be surrounded between two adjacent first sealing lips 30 and two adjacent second sealing lips 40, without limitation.

[0077] The second sealing lip 40 forms a second line of defense. When the first sealing lip 30 experiences minor leakage due to wear or pressure fluctuations, the second sealing lip 40 can immediately block the medium diffusion path, achieving a "double-insurance" seal. The first sealing lip 30 and the second sealing lip 40 together surround the mounting hole 21, forming a closed cavity. Even if the medium breaches the outer seal, it will be confined within the cavity, preventing direct intrusion into the equipment. When the medium pressure increases, the first sealing lip 30 deforms under pressure, increasing the contact area with the sealing surface and simultaneously increasing the sealing force; the second sealing lip 40 further compresses through elastic deformation, filling potential gaps. When equipment vibration or temperature changes cause micro-displacement of components, the flexible structure of the second sealing lip 40 can absorb some of the displacement energy, reducing fatigue damage to the first sealing lip 30 and extending the seal life.

[0078] Please refer to Figures 5 to 7 In one embodiment, the annular support 10 has a through hole to form a connecting portion 12, and the annular support 10 also includes a mating portion 50, which is received within the connecting portion 12.

[0079] Optionally, the mating part 50 can be selected according to the product structure, and the mating part 50 can be a steel sleeve or a nut. Specifically, when the mating part 50 is a steel sleeve, the corresponding connecting part 12 is a through hole that passes through the first surface 111 and the second surface 112. When the mating part 50 is a nut, the corresponding connecting part 12 can pass through only the first surface 111.

[0080] Optionally, a guide surface or locating pin may be designed in the connection part 12 to guide the sealing assembly 100 into place accurately and avoid installation deviation.

[0081] The through hole serves as the basic connection channel for the connecting part 12, allowing fasteners such as bolts and screws to pass through and form a mechanical connection. The mating part 50 is embedded in the through hole, increasing the wall thickness of the connecting part 12 and improving structural strength. Specifically, when the mating part 50 is a steel sleeve, it can provide the annular support 10 to evenly transfer external loads (such as tensile force and shear force) to the fastener through the through hole, avoiding local stress concentration. When the mating part 50 is a nut, it mates with the bolt to form a threaded connection, providing frictional resistance through preload and enhancing shear resistance. The connection part 12 and the mating part 50 make the installation process of the sealing assembly 100 simpler, while strengthening the connection strength between the sealing assembly 100 and the sealing surface.

[0082] Please refer to Figure 6 In one embodiment, a snap-fit ​​groove 15 is formed on the first surface 111 and / or the second surface 112, and the annular covering member 20 is embedded in the snap-fit ​​groove 15. The bottom wall of the snap-fit ​​groove 15 can be connected to the inner peripheral surface 113 of the annular support member 10, or the bottom wall of the snap-fit ​​groove 15 can be spaced apart from the inner peripheral surface 113 of the annular support member 10.

[0083] Specifically, the annular cover 20 is in close contact with the side and bottom walls of the snap-fit ​​groove 15.

[0084] Optionally, the snap-fit ​​groove 15 extends circumferentially along the annular support member 10, or the snap-fit ​​groove 15 extends radially along the annular support member 10. When the snap-fit ​​groove 15 extends circumferentially along the annular support member 10, the snap-fit ​​groove 15 is an annular groove connected end to end, or the snap-fit ​​groove 15 is an annular groove spaced apart end to end.

[0085] Optionally, there may be multiple snap-fit ​​grooves 15 on the first surface 111. The multiple snap-fit ​​grooves 15 are spaced apart in the circumferential and / or radial direction of the annular support 10.

[0086] The snap-fit ​​groove 15 increases the contact area between the annular cover 20 and the annular support 10, and provides a space for the annular cover 20 to be embedded or snapped in, thereby increasing the connection strength between the annular cover 20 and the annular support 10.

[0087] In one embodiment, the annular support 10 and the annular covering 20 are integral components.

[0088] Specifically, the molding method of the one-piece component is to directly inject the molten annular covering 20 into part of the annular support 10 through a die-casting injection molding process to form a one-piece component.

[0089] Optionally, the temperature resistance of the annular support 10 is greater than that of the annular covering 20. Specifically, the melting point of the annular support 10 is greater than that of the annular covering 20, thus ensuring that the annular support 10 is not affected by the melting annular covering 20 during the integral molding process.

[0090] Please refer to Figure 1 and Figure 8 The present invention provides a sealing device, including a housing 300, a connector 200 and a sealing assembly 100 as described in any of the foregoing embodiments. The connector 200 is connected to the connecting part 12. The outer peripheral surface of the sealing assembly 100 and the inner wall surface of the housing 300 enclose a second cavity 220. The sealing assembly 100 separates the first cavity 210 and the second cavity 220.

[0091] Optionally, the connector 200 can be a bolt, a steel nail, etc. When the connector 200 is a bolt, the connecting part 12 is a hole structure or groove structure that penetrates the first surface 111, and the corresponding mating part 50 is a nut that is housed in the connecting part 12. When the connector 200 is a component with a smooth outer circumference, such as a steel nail, the connecting part 12 is a through hole that penetrates the first surface 111 and the second surface 112, and the corresponding mating part 50 is a steel sleeve. When the annular support 10 includes a first annular part 13 and a second annular part 14 spaced apart in the first direction Z, the second annular part 14 and / or the first annular part 13 are provided with corresponding mating parts 50, and the connector 200 is fixed by passing through the sealing assembly 100.

[0092] In the design of the sealing device, the coordinated operation of the connector 200 and the sealing assembly 100 can ensure system reliability and sealing performance.

[0093] Specifically, in the sealing device, the third annular plate 24 of the sealing assembly 100 serves as the bottom plate, and the first annular plate 22 of the sealing assembly 100 serves as the top plate. The annular sealing assembly 100, together with the bottom and top walls of the housing 300, forms a first cavity 210. The annular sealing assembly 100, together with the side, bottom, and top walls of the housing 300, forms a second cavity 220. The sealing assembly 100 is connected and fixed to the housing 300 through the mating part 50. The sealing assembly 100 can prevent the first cavity 210 and the second cavity 220 from communicating, thereby achieving a seal.

[0094] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0095] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A sealing assembly, characterized in that, include: An annular support member includes a first surface, a second surface, and an inner circumferential surface. The first surface and the second surface are opposite to each other. The inner circumferential surface connects the first surface and the second surface. The first surface and / or the second surface are provided with connecting portions. The inner circumferential surface encloses and forms a first cavity. An annular covering is disposed on the first surface, the second surface, and the inner circumferential surface. The annular covering has a mounting hole. In an orthographic projection perpendicular to the first surface or the second surface, the mounting hole at least partially overlaps with the connecting portion. The elastic modulus of the annular covering is less than the elastic modulus of the annular support. The inner circumferential surface facing the annular covering is provided with a first mounting part, and the annular covering also includes a second mounting part, the first mounting part and the second mounting part being connected and fixed.

2. The sealing assembly according to claim 1, characterized in that, The annular support includes a first annular portion and a second annular portion that are movable relative to each other in a first direction. The annular covering connects the first annular portion and the second annular portion. The first surface is the surface of the first annular portion facing away from the second annular portion, and the second surface is the surface of the second annular portion facing away from the first annular portion.

3. The sealing assembly according to claim 2, characterized in that, The thickness of the first annular portion in the first direction is d1, and the distance between the first annular portion and the second annular portion in the first direction is d2, satisfying: 1≤d1 / d2≤1.

5.

4. The sealing assembly according to claim 2, characterized in that, The annular covering includes a first annular plate, a second annular plate, and a third annular plate connected in sequence. The first annular portion has a first inner circumferential surface, and the second annular portion has a second inner circumferential surface. The first annular plate is disposed on the first surface, and the second annular plate is disposed corresponding to the first inner circumferential surface and the second inner circumferential surface. The second annular plate is deformable in the first direction, and the third annular plate is disposed on the second surface. Both the first annular portion and the second annular portion have the connecting portion, and both the first annular plate and the second annular plate have the mounting hole.

5. The sealing assembly according to claim 4, characterized in that, There are multiple first mounting portions, and multiple first mounting portions are disposed on the first inner peripheral surface and / or the second inner peripheral surface; Wherein, the first mounting part is a groove with an opening facing the first annular plate and / or the second annular plate, and the second mounting part is correspondingly protruding from the first annular plate or the second annular plate, with each of the second mounting parts extending into the first mounting part. And / or, the second mounting portion is a groove with an opening facing the first inner circumferential surface and / or the second inner circumferential surface, the first mounting portion protrudes from the first inner circumferential surface and / or the second inner circumferential surface, and the first mounting portion extends into the second mounting portion in a corresponding manner.

6. The sealing assembly according to claim 4, characterized in that, The second annular plate includes a first part, a second part, and a third part connected sequentially in the first direction. The first part corresponds to the first inner circumferential surface, and the third part corresponds to the second inner circumferential surface. The second part is disposed at the interval between the first annular part and the second annular part. The interval between the second part and the annular support member first increases and then decreases along the direction from the first part to the third part.

7. The sealing assembly according to claim 6, characterized in that, The first part has a first sealing groove at the end near the second part, and the first sealing groove extends along the first inner circumferential surface; and / or, the third part has a second sealing groove at the end near the second part, and the second sealing groove extends along the second inner circumferential surface.

8. The sealing assembly according to claim 4, characterized in that, The sealing assembly further includes a first sealing lip, which is disposed on the surface of the first annular plate facing away from the third annular plate and the surface of the third annular plate facing away from the first annular plate.

9. The sealing assembly according to claim 8, characterized in that, The width of the first sealing lip is d1, which satisfies: d1≥1mm; And / or, the lip angle of the first sealing lip is 30°-45°.

10. The sealing assembly according to claim 8, characterized in that, There are multiple first sealing lips, which extend circumferentially along the annular support and are spaced apart on the surface of the annular support. The mounting hole is located between two adjacent first sealing lips.

11. The sealing assembly according to claim 10, characterized in that, The sealing assembly further includes a second sealing lip, which is disposed on the surface of the first annular plate facing away from the third annular plate. The second sealing lip connects two adjacent first sealing lips, and the first sealing lip and the second sealing lip surround the mounting hole.

12. The sealing assembly according to claim 1, characterized in that, The annular support has a through hole to form the connecting portion, and the annular support also includes a mating portion that is received within the connecting portion.

13. The sealing assembly according to any one of claims 1 to 12, characterized in that, The first surface and / or the second surface are provided with snap-fit ​​grooves, and the annular cover is embedded in the snap-fit ​​grooves.

14. The sealing assembly according to any one of claims 1 to 12, characterized in that, The annular support and the annular covering are integral components.

15. A sealing device, characterized in that, The device includes a housing, a connector, and a sealing assembly as described in any one of claims 1 to 14, wherein the connector is connected to the connecting portion, the outer peripheral surface of the sealing assembly and the inner wall surface of the housing enclose a second cavity, and the sealing assembly separates the first cavity and the second cavity.

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