Composite check ring and sealing structure

Abstract

The invention discloses a composite check ring and a sealing structure, and the composite check ring comprises a first ring body, a second ring body and a third ring body, a second clamping part is arranged on the inner side wall of the second ring body, the first ring body is sleeved with the second ring body, and the second clamping part is connected with the first clamping part in a clamped mode; one of the first clamping part and the second clamping part is a clamping groove, and the other one is a buckle; when the first clamping part is a buckle, the first clamping part and the first ring body are of an integrally formed structure; when the second clamping part is a buckle, the second clamping part and the second ring body are of an integrally-formed structure. When the first ring body and the second ring body are assembled, the second ring body is arranged outside the first ring body in a sleeving manner, and the second clamping part is clamped in the first clamping part, so that the second ring body and the first ring body can be tightly buckled and firmly combined, and the assembling mode of the first ring body and the second ring body is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical auxiliary accessories, in particular to a composite check ring and a sealing structure. BACKGROUND

[0002] In the related art, the check ring is usually a check ring of a single material, and the application scenarios of the check ring of a single material are limited, mainly aiming at general use conditions, such as scenes of conventional temperature and conventional pressure. However, as the pressure and temperature of the application condition are higher and higher, PTFE and modified PTFE as the material of the traditional check ring cannot meet the use requirements under high temperature and high pressure due to the low hardness and modulus (elastic modulus 1000 MPa), and therefore a hard plastic material with high modulus, such as PEEK, PI, PA, etc., is usually used to make the check ring.

[0003] However, when the hard plastic material with high modulus is used as the check ring, the check ring itself is prone to wear and gnaw the elastic sealing element when the check ring is frequently in contact with the elastic sealing element, and therefore a layer of soft plastic material, such as PTFE, is added as protection in the related art. At present, the combination of the two materials is generally in the form of bonding, and the bonding effect is limited by the adhesive. In addition, the bonding process needs to ensure the alignment of the two materials at the first time, otherwise it is difficult to correct the misalignment and the operation is difficult. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a composite check ring, which can reduce the assembly difficulty.

[0005] The present application also provides a sealing structure having the composite check ring.

[0006] According to the composite check ring of the first aspect of the present application, the first ring body is provided with a first clamping portion on the outer side wall; the second ring body is provided with a second clamping portion on the inner side wall, the second ring body is sleeved outside the first ring body, and the second clamping portion is clamped with the first clamping portion; wherein one of the first clamping portion and the second clamping portion is a clamping groove, and the other is a clamping buckle; When the first clamping portion is the clamping buckle, the first clamping portion and the first ring body are in an integral molding structure; when the second clamping portion is the clamping buckle, the second clamping portion and the second ring body are in an integral molding structure.

[0007] According to the composite check ring of the present application, at least the following beneficial effects are achieved: In the composite check ring, when the first ring body and the second ring body are assembled, the second ring body is sleeved on the first ring body, and the second clamping part is clamped in the first clamping part, so that the second ring body is buckled with the first ring body, and the assembly of the first ring body and the second ring body is simple, and the cooperation of the first clamping part and the second clamping part also has a positioning effect, so that the assembly accuracy of the first ring body and the second ring body can be ensured. In addition, if one of the ring bodies is damaged, it can be directly replaced.

[0008] According to some embodiments of the application, the first clamping part is in an annular structure and coaxially arranged with the first ring body, and the second clamping part is in an annular structure and coaxially arranged with the second ring body.

[0009] According to some embodiments of the application, the outer diameter of the first ring body is defined as d1, the inner diameter of the first ring body is defined as d2, the outer diameter of the second ring body is defined as D1, and the inner diameter of the second ring body is defined as D2. When D1-D2>d1-d2, the first clamping part is the buckle, and the second clamping part is the clamping groove. When D1-D2<d1-d2, the first clamping part is the clamping groove, and the second clamping part is the buckle.

[0010] According to some embodiments of the application, the second ring body is provided with a first cutout extending from the outer sidewall of the second ring body towards the inner sidewall of the second ring body, and the first cutout cuts off the second ring body. The first ring body is provided with a second cutout extending from the outer sidewall of the first ring body towards the inner sidewall of the first ring body, and the second cutout cuts off the first ring body. The second cutout is opposite to and in communication with the first cutout.

[0011] According to some embodiments of the application, the extension direction of the first cutout from the outer sidewall of the second ring body to the inner sidewall of the second ring body is the same as the extension direction of the second cutout from the outer sidewall of the first ring body to the inner sidewall of the first ring body.

[0012] According to some embodiments of the application, the first cutout and the second cutout cooperate to form a cutout assembly, the composite check ring has a first cutting surface and a second cutting surface spaced apart from and opposite to the first cutting surface, the cutout assembly is formed between the first cutting surface and the second cutting surface, both ends of the first clamping part and both ends of the second clamping part extend to the first cutting surface and the second cutting surface respectively, the first cutting surface is provided with a first glue groove around the buckle, and the first glue groove is provided with first adhesive.

[0013] According to some embodiments of the present application, the second cut surface is provided with a second glue groove arranged around the buckle, and the second glue groove is provided with second adhesive.

[0014] According to some embodiments of the present application, the material of the first ring body is softer than that of the second ring body, the first cutout has a first edge and a second edge arranged oppositely and spaced apart at one end of the outer side wall of the second ring body, the first edge is provided with a first chamfer, and the second edge is provided with a second chamfer; or, the material of the second ring body is softer than that of the first ring body, the second cutout has a third edge and a fourth edge arranged oppositely and spaced apart at one end of the inner side wall of the first ring body, the third edge is provided with a third chamfer, and the fourth edge is provided with a fourth chamfer.

[0015] According to some embodiments of the present application, the number of the first clamping parts is multiple, and the multiple first clamping parts are arranged spaced apart along the thickness direction of the first ring body; the number of the second clamping parts is multiple, and the multiple second clamping parts are arranged spaced apart along the thickness direction of the second ring body. The multiple first clamping parts correspond to the multiple second clamping parts one by one.

[0016] According to the sealing structure of the second aspect of the embodiments of the present application, the sealing structure comprises: a sealing assembly; and the composite retainer ring of the above embodiments, which is arranged on one side of the sealing assembly along the axial direction of the sealing assembly.

[0017] According to the composite retainer ring of the embodiments of the present application, at least the following beneficial effects are achieved: The sealing structure of the present application has the composite retainer ring of the above embodiments, when assembling the first ring body and the second ring body, the second ring body is sleeved on the outside of the first ring body, and the second clamping part is clamped in the first clamping part, so that the second ring body is buckled with the first ring body, and the combination is firm, the assembly mode of the first ring body and the second ring body is simple, and the cooperation of the first clamping part and the second clamping part also has a positioning effect, which can ensure the assembly precision of the first ring body and the second ring body. In addition, if one of the ring bodies is damaged, it can be directly replaced.

[0018] Additional aspects and advantages of the present application will be made apparent from the following description, which is given merely by way of non-limiting example, in which reference will be made to the attached drawings and in which: BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in conjunction with the drawings and embodiments, in which: Figure 1 It is a structure schematic view of the composite retainer ring of the first embodiment of the present application; Figure 2 It is a sectional structure schematic view of the composite retainer ring of the first embodiment of the present application; Figure 3 Schematic diagram of a partial cross-sectional structure of a composite retaining ring according to a second embodiment of the present invention; Figure 4 This is a schematic structural diagram of a composite retaining ring according to a third embodiment of the present invention; Figure 5 Schematic diagram of the partial structure of a composite retaining ring according to a fourth embodiment of the present invention; Figure 6 Schematic diagram of the cross-sectional structure of a composite retaining ring according to a fifth embodiment of the present invention; Figure 7 Schematic diagram of the cross-sectional structure of a composite retaining ring according to a sixth embodiment of the present invention; Figure 8 Schematic diagram of the cross-sectional structure of a composite retaining ring according to a seventh embodiment of the present invention; Figure 9 Schematic diagram of the sealing structure of the eighth embodiment of the present invention.

[0020] Figure Number: 100, composite retaining ring; 110, first ring body; 111, first clamping portion; 112, second cutout; 1121, third section; 120, second ring body; 121, second clamping portion; 122, first cutout; 123, first chamfer; 124, second chamfer; 130, cutout assembly; 131, first section; 132, first rubber groove; 200, sealing assembly; 210, rubber ring; 220, sealing strip; 300, cylinder; 400. Axis. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] Example 1: like Figure 1 As shown, the composite retaining ring 100 involved in the first embodiment of the present invention includes a first ring body 110 and a second ring body 120, wherein the second ring body 120 is sleeved outside the first ring body 110, the first ring body 110 and the second ring body 120 are connected together, and the first ring body 110 and the second ring body 120 are coaxially arranged.

[0025] Combine Figure 1 and Figure 2 , wherein the outer wall of the first circle body 110 is provided with a first clamping portion 111; the inner wall of the second circle body 120 is provided with a second clamping portion 121, the second circle body 120 is sleeved outside the first circle body 110, and the second clamping portion 121 is clamped with the first clamping portion 111, so that the connection between the first circle body 110 and the second circle body 120 can be realized.

[0026] Specifically, the first clamping portion 111 is a clamping slot, and the second clamping portion 121 is a buckle, which is passed through the clamping slot, and the first circle body 110 and the second circle body 120 are fixed by clamping; wherein, the first clamping portion 111 can be opened on the outer wall of the first circle body 110 by cutting, or the first circle body 110 with the first clamping portion 111 can be formed by injection molding; the second clamping portion 121 is integrally formed on the second circle body 120.

[0027] It can be understood that when assembling the first ring body 110 and the second ring body 120, the second ring body 120 is sleeved on the first ring body 110, and the second clamping portion 121 is clamped in the first clamping portion 111, so that the second ring body 120 is buckled with the first ring body 110, and the combination is firm. The assembly mode of the first ring body 110 and the second ring body 120 is simple, and the cooperation of the first clamping portion 111 and the second clamping portion 121 also has a positioning effect, which can ensure the assembly accuracy of the first ring body 110 and the second ring body 120. In addition, if one ring body is damaged, it can be directly replaced.

[0028] It should be noted that the first clamping portion 111 is annular and coaxially arranged with the first ring body 110, and the second clamping portion 121 is annular and coaxially arranged with the second ring body 120. In this way, when the first clamping portion 111 and the second clamping portion 121 are clamped, the relative movement of the first ring body 110 and the second ring body 120 in the radial and axial directions of the composite check ring 100 can be limited.

[0029] Further, the cross section (the plane in which the central axis of the composite check ring 100 is located) of the second clamping portion 121 is a mushroom-shaped structure, and correspondingly, the cross section of the first clamping portion 111 is also a mushroom-shaped groove structure.

[0030] As shown in Figure 2 The outer diameter of the first ring body 110 is defined as d1, the inner diameter of the first ring body 110 is d2, the outer diameter of the second ring body 120 is D1, and the inner diameter of the second ring body 120 is D2.

[0031] In the first embodiment, D1-D2 < d1-d2, the first clamping portion 111 is a clamping groove, and the second clamping portion 121 is a clamping buckle; in other embodiments, when D1-D2 > d1-d2, the first clamping portion 111 is a clamping buckle, and the second clamping portion 121 is a clamping groove.

[0032] It should be noted that in some other embodiments, whether the first clamping portion 111 is a clamping groove and the second clamping portion 121 is a clamping buckle, or the first clamping portion 111 is a clamping buckle and the second clamping portion 121 is a clamping groove, it can also not be designed according to the size of (D1-D2) and (D1-D2).

[0033] In addition, it should be noted that when the first clamping portion 111 is a clamping buckle, the first clamping portion 111 and the first ring body 110 are an integral structure; when the second clamping portion 121 is a clamping buckle, the second clamping portion 121 and the second ring body 120 are an integral structure.

[0034] As shown in Figure 1As shown, further, the second ring body 120 is provided with a first cutout 122 extending from the outer sidewall of the second ring body 120 towards the inner sidewall of the second ring body 120 and cutting through the second ring body 120; the first ring body 110 is provided with a second cutout 112 extending from the outer sidewall of the first ring body 110 towards the inner sidewall of the first ring body 110 and cutting through the first ring body 110; wherein the second cutout 112 is oppositely and communicatively arranged with the first cutout 122.

[0035] It can be understood that, by arranging the first cutout 122 and the second cutout 112 and oppositely and communicatively arranging the first cutout 122 with the second cutout 112, the installation of the composite retainer ring 100 can be facilitated.

[0036] Specifically, the extending direction of the first cutout 122 from the outer sidewall of the second ring body 120 to the inner sidewall of the second ring body 120 is the same as the extending direction of the second cutout 112 from the outer sidewall of the first ring body 110 to the inner sidewall of the first ring body 110.

[0037] A plane perpendicular to the central axis of the composite retainer ring 100 is defined as a reference plane, and the angle between the first cutout 122 and the second cutout 112 and the reference plane can be arranged between 20°-60°.

[0038] Further, in the first embodiment, the material of the first ring body 110 is softer than the material of the second ring body 120, specifically, the material of the second ring body 120 can be PEEK (polyether ether ketone), PI (polyimide) or PA (polyamide) and the like high-temperature-resistant hard plastic, and the material of the first ring body 110 can be PTFE (polytetrafluoroethylene) and the like soft plastic. When the composite retainer ring 100 is assembled, the first cutout 122 is first milled out of the second ring body 120, then the second ring body 120 is stretched in the radial direction thereof, and is conveniently buckled on the first ring body 110; when the second ring body 120 and the first ring body 110 are cooperated with each other, a cutter is inserted into the first cutout 122, and the first ring body 110 is cut along the radial direction of the first ring body 110 to form the second cutout 112.

[0039] In other embodiments, the material of the second ring body 120 is softer than that of the first ring body 110. Specifically, the material of the first ring body 110 can be a high-temperature resistant hard plastic such as PEEK (polyetheretherketone), PI (polyimide), or PA (polyamide), while the material of the second ring body 120 can be a soft plastic such as PTFE (polytetrafluoroethylene). When assembling the composite retaining ring 100, the second notch 112 is first milled out of the first ring body 110. The first ring body 110 is then compressed radially to facilitate the external insertion of the second ring body 120. When the second ring body 120 and the first ring body 110 are mated, a cutter is inserted into the second notch 112 and cut along the radial direction of the second ring body 120 to form the first notch 122.

[0040] It should be noted that the hardness and softness settings of the first ring body 110 and the second ring body 120 need to take into account the specific usage scenario of the composite retaining ring 100. When the composite retaining ring 100 is a sealing component for a shaft, the second ring body 120 is softer than the first ring body 110. When the composite retaining ring 100 is a sealing component for a hole, the first ring body 110 is softer than the second ring body 120.

[0041] Example 2: like Figure 3 As shown, the difference between the second embodiment and the first embodiment is that: there are multiple first clamping parts 111, and the multiple first clamping parts 111 are spaced apart along the thickness direction of the first ring body 110; there are multiple second clamping parts 121, and the multiple second clamping parts 121 are spaced apart along the thickness direction of the second ring body 120; the multiple first clamping parts 111 are clamped with the multiple second clamping parts 121 in a one-to-one correspondence. In this way, the connection reliability between the first ring body 110 and the second ring body 120 can be further improved.

[0042] It can be understood that in the second embodiment, the first clamping portion 111 is a clamping slot and the second clamping portion 121 is a buckle. Of course, in other embodiments, the first clamping portion 111 is also configured as a buckle and the first clamping portion 111 is configured as a clamping slot.

[0043] Example 3: like Figure 4As shown, in the third embodiment, the material of the first ring body 110 is softer than that of the second ring body 120. The first notch 122, located near the outer wall of the second ring body 120, has first and second edges that are spaced apart and opposite to each other. The third embodiment differs from the first embodiment in that the first edge is provided with a first chamfer 123, and the second edge is provided with a second chamfer 124. Both the first and second chamfers 123 and 124 are arc-shaped chamfers; however, in other embodiments, the first and second chamfers 123 and 124 may also be beveled. It is understood that during assembly of the composite retaining ring 100, the first notch 122 is first milled out of the second ring body 120. The second ring body 120 is then stretched radially to facilitate snapping onto the first ring body 110. When the second ring body 120 and the first ring body 110 are mated, a cutter is inserted into the first notch 122 and cuts the first ring body 110 radially to form the second notch 112. It is understandable that, when the tool extends from the outside of the second ring body 120 into the first incision 122 , the first chamfer 123 and the second chamfer 124 guide the tool.

[0044] In other embodiments, the material of the second ring body 120 is softer than that of the first ring body 110. The second notch 112, located near the inner sidewall of the first ring body 110, has opposing and spaced third and fourth edges. The third edge has a third chamfer, and the fourth edge has a fourth chamfer. Both the third and fourth chamfers are arcuate chamfers; however, in other embodiments, the third and fourth chamfers may also be beveled. It is understood that during assembly of the composite retaining ring 100, the second notch 112 is first milled into the first ring body 110. The first ring body 110 is then radially compressed to facilitate fitting the second ring body 120 thereover. When the second ring body 120 and the first ring body 110 are mated, a cutter is inserted into the second notch 112 and radially cut through the second ring body 120 to form the first notch 122. It can be understood that, when the tool is extended from the inner side of the first ring body 110 into the second incision 112 , the third chamfer and the fourth chamfer play a guiding role for the tool.

[0045] Example 4: Reference Figure 4 The first incision 122 and the second incision 112 cooperate to form an incision assembly 130. It can be understood that the first incision 122 and the second incision 112 are put together to form a larger incision, which is defined as the incision assembly 130. Figure 4 and Figure 5The composite retainer 100 comprises a first cut surface 131 and a second cut surface which is spaced apart from and opposite to the first cut surface 131, and a cut assembly 130 is formed between the first cut surface 131 and the second cut surface, wherein the two ends of the first clamping portion 111 respectively extend to the first cut surface 131 and the second cut surface, and the two ends of the second clamping portion 121 also respectively extend to the first cut surface 131 and the second cut surface.

[0046] As shown in Figure 5 , the first cut surface 131 is provided with a first glue groove 132 which surrounds the buckle, so that when the second ring body 120 is buckled with the first ring body 110, the first adhesive can also be injected into the first glue groove 132, so that the combination of the second ring body 120 and the first ring body 110 is more compact, and the relative movement of the second ring body 120 and the first ring body 110 along the circumference of the composite retainer 100 can also be limited.

[0047] Further, the second cut surface is also provided with a second glue groove which surrounds the buckle, and the second glue groove is provided with a second adhesive. In this way, the connection reliability of the second ring body 120 and the first ring body 110 can be further improved.

[0048] Example five As shown in Figure 6 , the difference between example five and example one is: The cross section (the plane where the center axis of the composite retainer 100 is located) of the second clamping portion 121 is an inclined rectangular structure, and correspondingly, the cross section of the first clamping portion 111 is also an inclined rectangular groove structure.

[0049] Example six As shown in Figure 7 , the difference between example six and example one is: The cross section (the plane where the center axis of the composite retainer 100 is located) of the second clamping portion 121 is a dovetail structure, and correspondingly, the cross section of the first clamping portion 111 is also a dovetail groove structure.

[0050] Example seven As shown in Figure 8 , the difference between example seven and example one is: The cross section (the plane where the center axis of the composite retainer 100 is located) of the second clamping portion 121 is a sine structure, and correspondingly, the cross section of the first clamping portion 111 is also a sine groove structure.

[0051] It should be noted that the above examples only describe that the composite retainer 100 has two ring bodies, of course, in other examples, the number of ring bodies of the composite retainer 100 can also be more than three.

[0052] Example eight As shown in Figure 9As shown, the eighth embodiment of the present application relates to a sealing structure, which comprises the sealing assembly 200 and the composite retaining ring 100 of the above embodiments.

[0053] Specifically, the sealing structure is used for sealing the gap between the cylinder body 300 and the shaft body 400, the sealing assembly 200 is sleeved outside the shaft body 400 and sealingly connected between the inner side wall of the cylinder body 300 and the outer side wall of the shaft body 400, and the composite retaining ring 100 is also sleeved outside the shaft body 400 and located inside the cylinder body 300. The number of the composite retaining ring 100 is two, and the two composite retaining rings 100 are respectively arranged on both sides of the sealing assembly 200 along the axial direction of the sealing assembly 200. The composite retaining ring 100 can reduce the risk of the sealing assembly 200 being squeezed into the gap between the cylinder body 300 and the shaft body 400.

[0054] In the sealing structure, the first ring body 110 is softer than the second ring body 120, and the sealing assembly 200 comprises a rubber ring 210 sleeved outside the shaft body 400 and a sealing strip 220 sleeved outside the rubber ring 210.

[0055] Of course, in other embodiments, the composite retaining ring 100 can also be one, and the composite retaining ring 100 is arranged on one side of the sealing assembly 200 along the axial direction of the sealing assembly 200 and located on the non-pressure side of the sealing assembly 200.

[0056] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A composite retaining ring, characterized in that: include: a first ring body, wherein an outer wall of the first ring body is provided with a first clamping portion; a second ring body, wherein the inner side wall of the second ring body is provided with a second clamping portion, the second ring body is sleeved outside the first ring body, and the second clamping portion is clamped with the first clamping portion; Wherein, one of the first clamping portion and the second clamping portion is a clamping slot, and the other is a buckle; When the first clamping portion is the buckle, the first clamping portion and the first ring body are an integrally formed structure; when the second clamping portion is the buckle, the second clamping portion and the second ring body are an integrally formed structure.

2. The composite retaining ring according to claim 1, characterized in that: The first clamping portion is an annular structure and is coaxially arranged with the first ring body, and the second clamping portion is an annular structure and is coaxially arranged with the second ring body.

3. The composite retaining ring according to claim 1, characterized in that: Define the outer diameter of the first circle body as d1, the inner diameter of the first circle body as d2, the outer diameter of the second circle body as D1, and the inner diameter of the second circle body as D2; When D1-D2>d1-d2, the first clamping portion is the buckle, and the second clamping portion is the slot; When D1-D2<d1-d2, the first clamping portion is the clamping slot, and the second clamping portion is the buckle.

4. The composite retaining ring according to claim 1, characterized in that: The second ring body is provided with a first cutout, the first cutout extending from the outer side wall of the second ring body toward the inner side wall of the second ring body, and the first cutout cuts off the second ring body; The first ring body is provided with a second cutout, the second cutout extending from the outer side wall of the first ring body toward the inner side wall of the first ring body, and the second cutout cuts off the first ring body; Wherein, the second incision is opposite to and connected to the first incision.

5. The composite retaining ring according to claim 4, characterized in that: An extending direction of the first cutout from the outer side wall of the second ring body to the inner side wall of the second ring body is the same as an extending direction of the second cutout from the outer side wall of the first ring body to the inner side wall of the first ring body.

6. The composite retaining ring according to claim 5, characterized in that: The first incision and the second incision cooperate to form a incision assembly, the composite retaining ring has a first cut surface and a second cut surface spaced apart from and opposite to the first cut surface, the incision assembly is formed between the first cut surface and the second cut surface, both ends of the first clamping portion and both ends of the second clamping portion extend to the first cut surface and the second cut surface respectively, the first cut surface is provided with a first glue groove arranged around the buckle, and the first glue groove is provided with a first adhesive.

7. The composite retaining ring according to claim 6, characterized in that: The second cross-section is provided with a second glue groove arranged around the buckle, and the second glue groove is provided with a second adhesive.

8. The composite retaining ring according to claim 4, characterized in that: The material of the first circle body is softer than that of the second circle body, and the first incision has a first edge and a second edge that are opposite and spaced apart at one end near the outer side wall of the second circle body, the first edge is provided with a first chamfer, and the second edge is provided with a second chamfer; or, the material of the second circle body is softer than that of the first circle body, and the second incision has a third edge and a fourth edge that are opposite and spaced apart at one end near the inner side wall of the first circle body, the third edge is provided with a third chamfer, and the fourth edge is provided with a fourth chamfer.

9. The composite retaining ring according to claim 1, characterized in that: There are multiple first clamping parts, and the multiple first clamping parts are spaced apart along the thickness direction of the first ring body; there are multiple second clamping parts, and the multiple second clamping parts are spaced apart along the thickness direction of the second ring body; The plurality of first clamping portions are clamped with the plurality of second clamping portions in a one-to-one correspondence.

10. A sealing structure, characterized in that: include: Sealing components; The composite retaining ring according to any one of claims 1 to 9 is arranged on one side of the sealing assembly along the axial direction of the sealing assembly.

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