High-performance composite sealing ring and preparation method thereof

Abstract

The invention discloses a high-performance composite sealing ring and a preparation method thereof, and solves the technical problem that the service life of the sealing ring is shortened due to the fact that the peripheral performance of the sealing ring is not emphatically improved when the sealing ring is manufactured in the prior art. The sealing ring structurally comprises a sealing ring body, a transition layer and an outer layer. The peripheral performance of the sealing ring is mainly improved, the surface of the sealing ring is of a wave-shaped structure, the whole sealing ring is unique in preparation method, the abrasion resistance, corrosion resistance and sealing stability of the sealing ring in a complex working environment are effectively improved, and the service life of the sealing ring is prolonged; a multi-layer composite structure and a special surface treatment technology are adopted, so that the sealing ring can adapt to different working conditions and media and has a wide application prospect; the preparation method is simple and feasible, is easy to realize large-scale production and application, and has relatively high economic benefits.

Description

Technical Field

[0001] The invention belongs to the technical field of piston seals, and in particular relates to a high-performance composite sealing ring and a preparation method thereof. Background Art

[0002] In many industrial fields, sealing rings play a vital role in preventing the leakage of fluids or gases. However, existing sealing ring manufacturing technologies often focus on improving the internal structure and material properties of the sealing ring, while ignoring the key factors affecting the peripheral performance of the sealing ring. This results in the sealing ring being easily damaged by the external working environment during actual use, especially in complex and harsh working environments such as wear, corrosion, high temperature and high pressure impact, and the damage to the peripheral sealing ring will reduce the service life and sealing effect of the sealing ring. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a high-performance composite sealing ring and a preparation method thereof, so as to solve the technical problem that the prior art does not focus on improving the peripheral performance of the sealing ring during the production of the sealing ring, resulting in reduced service life and sealing effect of the sealing ring.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A high-performance composite sealing ring comprises a sealing ring body and an outer layer arranged on the sealing ring body; the outer layer comprises a transition layer arranged on the sealing ring body and an outer layer arranged on the transition layer; the transition layer comprises two mutually connected first annular bodies and a second annular body, a plurality of first annular convex strips are distributed on the first annular body, and a plurality of second annular convex strips are distributed on the second annular body.

[0006] Furthermore, the first annular body is provided with a first embedding groove matched with the sealing ring body, the second annular body is provided with a second embedding groove matched with the sealing ring body, and the sealing ring body is sealingly embedded in the first embedding groove and the second embedding groove.

[0007] A method for preparing a high-performance composite sealing ring comprises the following steps:

[0008] Step 1: Prepare the sealing ring main body material, transition layer material and outer layer material;

[0009] Step 2: Use a mixing device to mix the sealing ring main body raw material, the transition layer raw material and the outer layer raw material respectively;

[0010] Step 3: using a molding machine to press the mixed sealing ring main body raw material into a sealing ring main body, and using a molding machine to press the mixed transition layer raw material component into a first annular body and a second annular body;

[0011] Step 4: embed the sealing ring body into the first annular body, cover the second annular body onto the first annular body, seal the fitting surfaces of the first annular body and the second annular body, and obtain a first annular ring;

[0012] Step 5: After the mixed outer layer raw material is placed in a thermal spraying device, the outer layer raw material is thermally sprayed on the surface of the first annular ring using the thermal spraying device to obtain a semi-finished sealing ring;

[0013] Step 6: Put the semi-finished sealing ring into a vulcanizer for vulcanization to obtain a rough sealing ring;

[0014] Step 7: Place the rough sealing ring in a nano-coating device for surface treatment to obtain a finished sealing ring.

[0015] Further, in step 1, the sealing ring main body raw material includes the following raw materials in parts by weight: 60-90 parts of fluororubber, 20-40 parts of styrene-butadiene rubber, 10 parts of carbon black powder, 5 parts of barium sulfate powder, 0.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 parts of vulcanizer.

[0016] Furthermore, in step 1, the transition layer raw material includes the following raw materials in parts by weight: 86-100 parts of fluororubber, 15 parts of carbon black powder, 10 parts of barium sulfate powder, 1.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 part of vulcanizer.

[0017] Furthermore, the outer layer raw material includes the following raw materials in parts by weight: 86-100 parts of fluororubber, 5-10 parts of ceramic powder, 4-5 parts of graphite powder, 10 parts of carbon black powder, 1-2 parts of magnesium oxide, 1.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 part of vulcanizer.

[0018] Furthermore, the fluororubber used in the raw materials of the sealing ring body, the transition layer and the outer layer is fluororubber 23.

[0019] Furthermore, the carbon black powder used in the raw materials of the sealing ring body, the transition layer and the outer layer is carbon black N220.

[0020] Furthermore, the accelerator used in the raw materials of the sealing ring body is tetramethylthiuram disulfide, and the accelerator used in the raw materials of the transition layer and the outer layer is bisphenol AF.

[0021] Furthermore, the vulcanizing agent used in the raw material of the sealing ring body is sulfur, and the vulcanizing agent used in the raw material of the transition layer and the outer layer is benzyl triphenyl phosphonium chloride.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The invention has a simple structure, a scientific and reasonable design, and is easy to use. The invention focuses on improving the peripheral performance of the sealing ring. The wavy structural design of the sealing ring surface and the unique preparation method of the sealing ring as a whole effectively improve the wear resistance, corrosion resistance and sealing stability of the sealing ring in a complex working environment, and prolongs the service life of the sealing ring; the multi-layer composite structure and special surface treatment technology are adopted to enable the sealing ring to adapt to different working conditions and media, and has broad application prospects; the preparation method is simple and feasible, easy to realize large-scale production and application, and has high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the sealing ring of the present invention.

[0025] Figure 2 It is a cross-sectional view of the first annular body.

[0026] Figure 3 It is a cross-sectional view of the second annular body.

[0027] Figure 4 The figure is a schematic flow chart of the steps of the method for preparing a sealing ring of the present invention.

[0028] The names corresponding to the reference numerals are:

[0029] 1-sealing ring body, 2-transition layer, 3-outer layer, 4-first annular body, 5-second annular body, 6-first convex strip, 7-second convex strip, 8-first embedding groove, 9-second embedding groove, 10-outer layer. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 or be constructed and operated in a specific orientation, and therefore they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1-4 As shown, the present invention provides a high-performance composite sealing ring and a preparation method thereof, which solves the technical problem that the prior art does not focus on improving the peripheral performance of the sealing ring during the production of the sealing ring, resulting in a reduced service life of the sealing ring.

[0034] The invention has a simple structure, a scientific and reasonable design, and is easy to use. The invention focuses on improving the peripheral performance of the sealing ring. The wavy structural design of the sealing ring surface and the unique preparation method of the sealing ring as a whole effectively improve the wear resistance, corrosion resistance and sealing stability of the sealing ring in a complex working environment, and prolongs the service life of the sealing ring; the multi-layer composite structure and special surface treatment technology are adopted to enable the sealing ring to adapt to different working conditions (corrosion, high temperature, etc.) and media (gas, liquid, etc.), and has broad application prospects; the preparation method is simple and feasible, easy to realize large-scale production and application, and has high economic benefits.

[0035] The sealing ring of the present invention is a multi-layer composite structure. The raw material components of the sealing ring body, the transition layer and the outer layer are reasonably arranged in sequence from the inside to the outside along the radial direction of the sealing ring cross section in hierarchical order. While ensuring the stability and reliability of the sealing ring, the wear resistance, corrosion resistance and high temperature resistance of the outer periphery of the sealing ring are mainly improved from the aspect of raw material composition, thereby increasing the service life of the sealing ring.

[0036] The sealing ring of the present invention can be used statically or dynamically. For example, it can be installed on the inner wall of a static seal or on a dynamic piston. The surface of the sealing ring of the present invention is a wavy structure. This structural design allows the sealing ring to better adapt to the sealing groove (a structure for embedding the sealing ring) or the contact wall structure (the contact wall refers to the wall surface in the seal that contacts the sealing ring, such as in the cylinder, where the sealing ring is installed on the piston. In this case, the contact wall refers to the inner wall of the cylinder that contacts the sealing ring) when it is under pressure. The multiple first annular bodies and the multiple second annular bodies that form the wavy structure undergo multiple deformations in the sealing groove or on the contact wall, filling the gap between the sealing groove and the sealing ring or the gap between the contact wall and the sealing ring, reducing the possibility of leakage of the medium in the seal and improving the sealing effect of the sealing ring. The present invention improves the sealing performance of the periphery of the sealing ring from the aspect of surface structure design.

[0037] The present invention utilizes nano coating equipment to process the surface of the sealing ring. The nano coating material in the nano coating equipment forms an extremely thin protective film after being deposited and solidified on the surface of the sealing ring. The protective film can reduce the friction coefficient of the surface of the sealing ring, reduce wear and accumulation of adhesion, improve the wear resistance of the sealing ring, and extend the service life of the sealing ring.

[0038] The sealing ring structure of the present invention includes a sealing ring body and an outer layer arranged on the sealing ring body; the outer layer includes a transition layer arranged on the sealing ring body and an outer layer arranged on the transition layer; the transition layer includes two mutually connected first annular bodies and a second annular body, a plurality of first annular convex strips are distributed on the first annular body, and a plurality of second annular convex strips are distributed on the second annular body.

[0039] The first annular body is provided with a first embedding groove matched with the sealing ring body, the second annular body is provided with a second embedding groove matched with the sealing ring body, and the sealing ring body is sealingly embedded in the first embedding groove and the second embedding groove.

[0040] The method for preparing the sealing ring of the present invention comprises the following steps:

[0041] Step 1: Prepare the sealing ring main body material, transition layer material and outer layer material;

[0042] Step 2: Use a mixing device to mix the sealing ring main body raw material, the transition layer raw material and the outer layer raw material respectively;

[0043] Step 3: using a molding machine to press the mixed sealing ring main body raw material into a sealing ring main body, and using a molding machine to press the mixed transition layer raw material component into a first annular body and a second annular body;

[0044] Step 4: embed the sealing ring body into the first annular body, cover the second annular body onto the first annular body, seal the fitting surfaces of the first annular body and the second annular body, and obtain a first annular ring;

[0045] Step 5: After the mixed outer layer raw material is placed in a thermal spraying device, the outer layer raw material is thermally sprayed on the surface of the first annular ring using the thermal spraying device to obtain a semi-finished sealing ring;

[0046] Step 6: Put the semi-finished sealing ring into a vulcanizer for vulcanization to obtain a rough sealing ring;

[0047] Step 7: Place the rough sealing ring in a nano-coating device for surface treatment to obtain a finished sealing ring.

[0048] The semi-finished sealing ring is placed in a vulcanizer for vulcanization. This allows the rubber components between adjacent layers and within the same layer to be cross-linked, connecting the adjacent layers as a whole, ensuring the stability and reliability of the sealing ring while improving the overall performance of the sealing ring.

[0049] In some embodiments, in step 1, the sealing ring main body raw material includes the following raw materials in parts by weight: 60-90 parts of fluororubber, 20-40 parts of styrene-butadiene rubber, 10 parts of carbon black powder, 5 parts of barium sulfate powder, 0.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 parts of vulcanizer.

[0050] In this embodiment, during the use of the sealing ring, the gap between the sealing ring and the sealing groove or between the sealing ring and the outlet wall is sealed mainly by the compression deformation of the outer periphery of the sealing ring. The sealing ring body is located in the central part of the sealing ring and mainly plays the role of filling and supporting. The sealing ring body supports the outer periphery of the sealing ring to make the overall structure of the sealing ring complete and the outer periphery of the sealing ring can be used normally. The sealing ring body fills the central part of the sealing ring so that the size of the sealing ring meets the corresponding use requirements. Therefore, in the composition of the raw materials of the sealing ring body, barium sulfate powder and styrene-butadiene rubber are both used as fillers to reduce the use of fluororubber and reduce costs.

[0051] In some embodiments, in step 1, the transition layer raw materials include the following raw materials in parts by weight: 86-100 parts of fluororubber, 15 parts of carbon black powder, 10 parts of barium sulfate powder, 1-2 parts of magnesium oxide, 1.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 part of vulcanizer.

[0052] In this embodiment, the raw materials of the transition layer and the main body of the sealing ring contain fluororubber, carbon black powder, barium sulfate powder, silane coupling agent, accelerator and vulcanizing agent, the purpose of which is to make the transition between the transition layer and the main body of the sealing ring smooth and improve the overall stability of the sealing ring structure. During vulcanization, the fluororubber in the transition layer and the fluororubber in the main body of the sealing ring are cross-linked, so that the transition layer and the main body of the sealing ring are connected as a whole, thereby improving the stability of the sealing ring structure. Other components of the same type in the transition layer and the main body of the sealing ring make the performance transition between the transition layer and the main body of the sealing ring natural, thus ensuring the performance stability of the sealing ring in the radial direction of the cross section, thereby ensuring the overall stability of the sealing ring structure.

[0053] The magnesium oxide in the transition layer is used as an acid absorber to absorb the hydrogen fluoride produced during the vulcanization of fluororubber, thus preventing hydrogen fluoride from corroding the metal in the vulcanization equipment. At the same time, magnesium oxide can also increase the crosslinking density of fluororubber and give the vulcanized fluororubber better thermal stability.

[0054] The transition layer is located inside the outer layer of the sealing ring body. During the use of the sealing ring, the working environment has higher requirements on the performance of the outer layer. Fluororubber has excellent heat resistance and corrosion resistance. The rubber in the transition layer does not contain styrene-butadiene rubber, but only fluororubber. Compared with the sealing ring body, the amount of fluororubber used in the transition layer is higher. In this way, the excellent heat resistance and corrosion resistance of fluororubber can be used to make the heat resistance and corrosion resistance of the transition layer higher than that of the sealing ring body. The heat resistance and corrosion resistance of the transition layer are improved to meet the corresponding performance requirements and extend the service life.

[0055] In some embodiments, the outer layer raw materials include the following raw materials in parts by weight: 86-100 parts of fluororubber, 5-10 parts of ceramic powder, 4-5 parts of graphite powder, 10 parts of carbon black powder, 1-2 parts of magnesium oxide, 1.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 part of vulcanizer.

[0056] In this embodiment, the transition layer raw material and the outer layer raw material both contain fluororubber, carbon black powder, magnesium oxide, silane coupling agent, accelerator and vulcanizer, the purpose of which is to make the transition between the transition layer and the outer layer smooth and improve the overall stability of the sealing ring structure.

[0057] During vulcanization, cross-linking occurs between the fluororubber in the transition layer and the fluororubber in the outer layer, connecting the transition layer and the outer layer as one, thus improving the stability of the sealing ring structure. Other components of the same type in the transition layer and the outer layer make the performance transition between the transition layer and the outer layer natural, thus ensuring the performance stability of the sealing ring in the radial direction of the cross section, thereby ensuring the overall stability of the sealing ring structure.

[0058] The magnesium oxide in the outer layer is used as an acid absorber to absorb the hydrogen fluoride produced during the vulcanization of fluororubber, thus preventing hydrogen fluoride from corroding the metal inside the vulcanization equipment. At the same time, magnesium oxide can also increase the cross-linking density of fluororubber and give the vulcanized fluororubber better thermal stability.

[0059] The outer layer is located outside the transition layer. When the sealing ring is in use, the outer layer is in direct contact with the medium inside the seal, the contact wall or the inner wall of the sealing groove. Compared with the transition layer, the outer layer has higher requirements for wear resistance, high temperature resistance and corrosion resistance. The graphite component used in the outer layer is mainly used to improve the lubricity, wear resistance, thermal conductivity and high temperature resistance of the outer layer of the sealing ring. The ceramic powder used in the outer layer is mainly used to improve the durability, corrosion resistance and high temperature resistance of the outer layer of the sealing ring. By adding graphite and ceramic powder that are different from the components in the transition layer to the outer layer, the wear resistance, corrosion resistance and high temperature resistance of the outer layer of the sealing ring can be further improved. The present invention focuses on improving the peripheral performance of the sealing ring, effectively improving the wear resistance, corrosion resistance and sealing stability of the sealing ring in a complex working environment, and extending the service life of the sealing ring.

[0060] The sealing ring of the present invention is a multi-layer composite structure. By configuring the type and content of components in each layer, each layer meets different performance requirements. Under the premise of ensuring the overall stability of the sealing ring, the overall performance of the sealing ring is enhanced, while the production cost is reduced, and the peripheral performance of the sealing ring is improved. The wear resistance, corrosion resistance and sealing stability of the periphery of the sealing ring in a complex working environment are effectively improved, and the service life of the sealing ring is extended.

[0061] In some embodiments, the fluororubber used in the raw materials of the sealing ring body, the transition layer and the outer layer are all fluororubber 23.

[0062] In some embodiments, the carbon black powder used in the raw materials of the sealing ring body, the transition layer and the outer layer is carbon black N220.

[0063] In some embodiments, the accelerator used in the raw material of the sealing ring body is tetramethylthiuram disulfide, and the accelerator used in the raw materials of the transition layer and the outer layer is bisphenol AF.

[0064] In some embodiments, the vulcanizing agent used in the raw material of the sealing ring body is sulfur, and the vulcanizing agent used in the raw materials of the transition layer and the outer layer is benzyl triphenylphosphonium chloride.

[0065] Fluororubber has excellent heat resistance and corrosion resistance. The sealing ring produced using fluororubber as the main component also has heat resistance and corrosion resistance. When producing sealing rings, adding barium sulfate to fluororubber can further enhance the acid and alkali resistance of the sealing ring, making the sealing ring stable in strong acid and alkali environments; barium sulfate has high thermal stability, which can further enhance the heat resistance and weather resistance of the sealing ring, thereby extending the service life of the sealing ring; barium sulfate can absorb and stabilize free radicals in fluororubber, inhibit the occurrence of oxidation reactions, slow down the aging rate of fluororubber, and thus improve the anti-aging performance of the sealing ring.

[0066] Adding carbon black powder to fluororubber can enhance the hardness and wear resistance of the sealing ring. Adding silane coupling agent to fluororubber can improve the fusion degree between fluororubber and other components and enhance the compression resistance of the sealing ring.

[0067] The main function of the vulcanizer is to cause cross-linking reaction of rubber molecular chains, transforming the linear molecular structure into a three-dimensional network structure, thereby significantly improving the mechanical properties, heat resistance, and aging resistance of the sealing ring. The function of the accelerator is to promote the vulcanization reaction and speed up the vulcanization speed.

[0068] Using bisphenol AF and benzyl triphenyl phosphonium chloride as the vulcanization system in fluororubber can enhance the ability of the sealing ring to resist compression deformation.

[0069] The mixing equipment, molding machine, vulcanizing machine, thermal spraying equipment and nano-coating equipment used in the present invention are all existing known electrical equipment and can be directly purchased and used on the market. The structures, circuits, and control principles of the mixing equipment, molding machine, vulcanizing machine, thermal spraying equipment and nano-coating equipment are existing known technologies. Therefore, the structures, circuits, and control principles of the mixing equipment, molding machine, vulcanizing machine, thermal spraying equipment and nano-coating equipment are not repeated here.

[0070] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting them, and certainly not limiting the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In other words, any changes or modifications made to the main design concept and spirit of the present invention that have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A high performance composite sealing ring, characterized in that: The invention comprises a sealing ring body (1) and an outer layer (10) arranged on the sealing ring body (1); the outer layer (10) comprises a transition layer (2) arranged on the sealing ring body (1) and an outer layer (3) arranged on the transition layer (2); the transition layer (2) comprises two mutually connected first annular bodies (4) and second annular bodies (5); a plurality of first annular convex strips (6) are distributed on the first annular body (4), and a plurality of second annular convex strips (7) are distributed on the second annular body (5).

2. A high performance composite sealing ring according to claim 1, characterized in that: The first annular body (4) is provided with a first embedding groove (8) adapted to the sealing ring body (1), the second annular body (5) is provided with a second embedding groove (9) adapted to the sealing ring body (1), and the sealing ring body (1) is sealingly embedded in the first embedding groove (8) and the second embedding groove (9).

3. A method for preparing a high-performance composite sealing ring according to any one of claims 1 to 2, characterized in that: The steps include: Step 1: Prepare the sealing ring main body material, transition layer material and outer layer material; Step 2: Use a mixing device to mix the sealing ring main body raw material, the transition layer raw material and the outer layer raw material respectively; Step 3: using a molding machine to press the mixed sealing ring main body raw material into a sealing ring main body, and using a molding machine to press the mixed transition layer raw material component into a first annular body and a second annular body; Step 4: embed the sealing ring body into the first annular body, cover the second annular body onto the first annular body, seal the fitting surfaces of the first annular body and the second annular body, and obtain a first annular ring; Step 5: After the mixed outer layer raw material is placed in a thermal spraying device, the outer layer raw material is thermally sprayed on the surface of the first annular ring using the thermal spraying device to obtain a semi-finished sealing ring; Step 6: Put the semi-finished sealing ring into a vulcanizer for vulcanization to obtain a rough sealing ring; Step 7: Place the rough sealing ring in a nano-coating device for surface treatment to obtain a finished sealing ring.

4. The method for preparing a high-performance composite sealing ring according to claim 3, characterized in that: In step 1, the sealing ring main body material includes the following raw materials in parts by weight: 60-90 parts of fluororubber, 20-40 parts of styrene-butadiene rubber, 10 parts of carbon black powder, 5 parts of barium sulfate powder, 0.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 parts of vulcanizer.

5. The method for preparing a high-performance composite sealing ring according to claim 4, characterized in that: In step 1, the transition layer raw material includes the following raw materials in parts by weight: 86-100 parts of fluororubber, 15 parts of carbon black powder, 10 parts of barium sulfate powder, 1-2 parts of magnesium oxide, 1.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 part of vulcanizer.

6. The method for preparing a high-performance composite sealing ring according to claim 5, characterized in that: The outer layer raw materials include the following raw materials in parts by weight: 86-100 parts of fluororubber, 5-10 parts of ceramic powder, 4-5 parts of graphite powder, 10 parts of carbon black powder, 1-2 parts of magnesium oxide, 1.5 parts of silane coupling agent, 1-2 parts of accelerator, and 0.8-1 part of vulcanizer.

7. The method for preparing a high-performance composite sealing ring according to claim 6, characterized in that: The fluororubber used in the raw materials of the sealing ring body, transition layer and outer layer is fluororubber 23.

8. The method for preparing a high-performance composite sealing ring according to claim 6, characterized in that: The carbon black powder used in the raw materials of the sealing ring body, transition layer and outer layer is carbon black N220.

9. The method for preparing a high-performance composite sealing ring according to claim 6, characterized in that: The accelerator used in the raw material of the sealing ring body is tetramethylthiuram disulfide, and the accelerator used in the raw material of the transition layer and the outer layer is bisphenol AF.

10. The method for preparing a high-performance composite sealing ring according to claim 6, characterized in that: The vulcanizing agent used in the raw material of the seal ring body is sulfur, and the vulcanizing agent used in the raw materials of the transition layer and the outer layer is benzyltriphenylphosphonium chloride.

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