High-resilience corrosion-resistant sealing ring and preparation method thereof

Abstract

The invention relates to the technical field of sealing ring preparation, in particular to a high-resilience corrosion-resistant sealing ring and a preparation method thereof. The sealing ring sequentially comprises an outer mechanical layer A, a secondary outer inflatable airbag layer A, a conductive buffer layer, a thermal anti-compression layer, a high-temperature-resistant dynamic layer, a creep-resistant reinforcing layer, a super-corrosion-resistant high-elasticity heat-conducting layer, an outer inflatable airbag layer B and an outer mechanical layer B, the outer mechanical layer A and the outer mechanical layer B are both made of polytetrafluoroethylene-based composite materials with the thickness ranging from 0.5 mm to 1 mm. According to the high-resilience corrosion-resistant sealing ring, 10-layer functional layered design is adopted, the outer mechanical layer is composed of polytetrafluoroethylene and carbon fibers, and the bonding strength is improved through surface laser etching microgrooves; a six-channel DATA-52 type air pressure sensor is arranged in the secondary outer inflatable air bag layer to achieve + / -0.05 kPa precision real-time monitoring, meanwhile, plasma activation interlayer bonding and directional vulcanization are adopted in the preparation process, compared with a traditional process, the production efficiency is higher, the air bag is suitable for various scenes, and the comprehensive performance is remarkably superior to that of a traditional product.

Description

Technical Field

[0001] The present invention relates to the technical field of seal ring preparation, and specifically relates to a highly resilient and corrosion-resistant seal ring and a preparation method thereof. Background Art

[0002] A seal ring is an elastic element used to fill the gaps of mechanical components. By deforming itself, it blocks fluid leakage and prevents external pollutants from invading. Its core functions include maintaining the stability of the system pressure, absorbing vibration and shock, and resisting the influence of extreme environments such as temperature and chemical corrosion.

[0003] Traditional seal rings usually adopt single-layer or simple multi-layer structures, and have problems such as poor corrosion resistance, insufficient resilience, and lack of dynamic monitoring ability. The preparation process mostly relies on single-step compression molding, with weak interfacial bonding force and no directional structure design, resulting in poor anti-creep performance and a single function that is difficult to meet multiple requirements such as high temperature resistance and heat conduction.

[0004] Based on this, the present invention provides a highly resilient and corrosion-resistant seal ring and a preparation method thereof to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a highly resilient and corrosion-resistant seal ring and a preparation method thereof. The prepared high-strength metal connector material not only has good mechanical properties, but also has excellent corrosion resistance, effectively ensuring its quality and quality.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention proposes a highly resilient and corrosion-resistant seal ring. The seal ring successively includes an outer mechanical layer A, a sub-outer inflatable airbag layer A, a conductive buffer layer, a thermal anti-compression layer, a high-temperature resistant dynamic layer, an anti-creep enhancement layer, a super corrosion-resistant layer, a high-elasticity heat conduction layer, a sub-outer inflatable airbag layer B, and an outer mechanical layer B. Both the outer mechanical layer A and the outer mechanical layer B are made of a polytetrafluoroethylene-based composite material with a thickness of 0.5 - 1 mm;

[0008] Both the sub-outer inflatable airbag layer A and the sub-outer inflatable airbag layer B are airbag structures made of a silicone rubber-based flexible material, and six microporous air conduction channels are evenly opened inside the sub-outer inflatable airbag layer A and the sub-outer inflatable airbag layer B. A DATA-52 type air pressure sensor is installed on each channel;

[0009] The conductive buffer layer 3 is made of a fluororubber-based composite material with a honeycomb-like porous structure;

[0010] The thermal anti-compression layer 4 is made of a fluororubber-based composite material with a gradient arrangement;

[0011] The high-temperature resistant dynamic layer 5 is made of a fluororubber-based composite material with a continuous corrugated structure;

[0012] The anti-creep reinforcement layer is made of a fluororubber-based composite material with fiber-oriented arrangement;

[0013] The super corrosion-resistant layer is made of a dense and pore-free fluororubber-based composite material;

[0014] The high-elasticity heat-conducting layer is made of a fluororubber-based composite material with a layered cross-linked network.

[0015] Preferably, the outer mechanical layer A and the outer mechanical layer B include the following components by mass:

[0016] Polytetrafluoroethylene: 70 - 80 parts;

[0017] Carbon fiber: 20 - 30 parts;

[0018] Laser-etched microgrooves are provided on the surfaces of both the outer mechanical layer A and the outer mechanical layer B.

[0019] Preferably, the high-elasticity heat-conducting layer, the sub-outer inflatable airbag layer A and the sub-outer inflatable airbag layer B include the following components by mass:

[0020] Silicone rubber: 85 - 90 parts;

[0021] Boron nitride: 10 - 15 parts;

[0022] Both the sub-outer inflatable airbag layer A and the sub-outer inflatable airbag layer B are hollow and flat-shaped airbags with a thickness of 0.3 - 0.5 mm, and the high-elasticity heat-conducting layer is a solid structure with a thickness of 0.3 - 0.4 mm.

[0023] Preferably, the conductive buffer layer includes the following components by mass:

[0024] Fluororubber: 80 - 85 parts;

[0025] Carbon nanotubes: 15 - 20 parts;

[0026] The thickness of the conductive buffer layer is 0.2 - 0.4 mm.

[0027] Preferably, the thermal anti-compression layer includes the following components by mass:

[0028] Fluororubber: 85 - 90 parts;

[0029] Graphene: 10 - 15 parts;

[0030] The thickness of the thermal anti-compression layer is 0.2 - 0.3 mm.

[0031] Preferably, the high-temperature resistant dynamic layer includes the following components by mass:

[0032] Fluororubber: 80 - 85 parts;

[0033] Silica: 15 - 20 parts;

[0034] The thickness of the thermal compression resistance layer is 0.3 - 0.5 mm.

[0035] Preferably, the anti - creep reinforcement layer includes the following components by mass parts:

[0036] Fluororubber: 75 - 80 parts;

[0037] Short - cut carbon fiber: 20 - 25 parts;

[0038] The aspect ratio of the short - cut carbon fiber in the thermal compression resistance layer is 5:1, and the thickness of the thermal compression resistance layer is 0.3 - 0.4 mm.

[0039] Preferably, the super - corrosion - resistant layer includes the following components by mass parts:

[0040] Fluororubber: 70 - 75 parts;

[0041] Polytetrafluoroethylene powder: 25 - 30 parts;

[0042] The outer surface of the super - corrosion - resistant layer is treated by nano - polishing, and the thickness is 0.2 - 0.3 mm.

[0043] Based on the above materials, the present invention also provides a preparation method of a high - resilience corrosion - resistant sealing ring, including the following steps:

[0044] S1. Prepare the outer mechanical layer A and the outer mechanical layer B:

[0045] Weigh 70 - 80 parts of polytetrafluoroethylene and 20 - 30 parts of carbon fiber by mass parts, place them in a high - speed mixer, and mix at a speed of 2000 - 2500 revolutions per minute for 15 - 20 minutes to ensure uniform dispersion of the carbon fiber;

[0046] Put the mixture into a mold pre - heated to 360 - 380 degrees Celsius, apply a pressure of 15 - 20 MPa, keep warm and pressurize for 30 - 40 minutes, and demold after cooling to room temperature to obtain a dense layer with a thickness of 0.5 - 1 mm.

[0047] Use a laser etching machine with a wavelength of 1064 nm and a power of 50 W to process micro - grooves on the surface, with a groove depth of 50 - 80 microns and a groove spacing of 0.2 - 0.3 mm.

[0048] S2. Prepare the secondary outer inflatable airbag layer A and the secondary outer inflatable airbag layer B:

[0049] Weigh 85 - 90 parts by mass of silicone rubber and 10 - 15 parts by mass of boron nitride, and mix them in a Banbury mixer at 60 - 80 °C for 30 minutes;

[0050] Inject the mixed rubber into a hollow flat mold and vulcanize it at 120 - 130 °C for 20 - 25 minutes to form an airbag structure with a thickness of 0.3 - 0.5 mm;

[0051] After vulcanization, use laser micro - machining to create 6 microporous air - guiding channels with a pore diameter of 0.1 - 0.2 mm inside the airbag;

[0052] Install DATA - 52 type air pressure sensors in each air - guiding channel, and fix and seal them with fluorosilicone adhesive. The curing condition is heating at 80 °C for 1 hour.

[0053] S3. Prepare the conductive buffer layer:

[0054] Weigh 80 - 85 parts by mass of fluororubber and 15 - 20 parts by mass of carbon nanotubes, add ethanol solvent and disperse them by ultrasonic for 30 minutes. After evaporating the solvent, mix them in a Banbury mixer at 80 - 90 °C for 20 minutes;

[0055] Inject the mixed rubber into a honeycomb - shaped mold and vulcanize it at 160 - 170 °C for 25 minutes to form a honeycomb - shaped porous structure layer with a thickness of 0.2 - 0.4 mm.

[0056] S4. Prepare the thermal anti - compression layer:

[0057] Weigh 85 - 90 parts by mass of fluororubber and 10 - 15 parts by mass of graphene, and mix them in two stages: in the first stage, premix 70% of the fluororubber and all the graphene at 80 °C for 15 minutes, and in the second stage, add the remaining fluororubber and continue to mix at 90 °C for 10 minutes;

[0058] Adopt the layered laying method to lay the inner layer of the high - graphene - content rubber compound and the outer layer of the low - content rubber compound into the mold in sequence, and vulcanize it at 160 °C and 20 MPa for 30 minutes to form a gradient - density layer with a thickness of 0.2 - 0.3 mm.

[0059] S5. Prepare the high - temperature resistant dynamic layer:

[0060] Weigh 80 - 85 parts by mass of fluororubber and 15 - 20 parts by mass of silica, and mix them in a Banbury mixer at 90 °C for 20 minutes;

[0061] Inject the mixed rubber into a corrugated mold and vulcanize it at 170 °C and 15 MPa for 35 minutes to form a continuous corrugated structure layer with a thickness of 0.3 - 0.5 mm.

[0062] S6. Prepare the anti - creep strengthening layer:

[0063] Weigh 75 - 80 parts by mass of fluororubber and 20 - 25 parts of short - cut carbon fiber. In a Banbury mixer, use magnetic field orientation technology to align the short - cut carbon fiber with an aspect ratio of 5:1 along the preset direction. The mixing temperature is 85 °C and the time is 25 minutes.

[0064] Place the rubber compound in a directional mold and vulcanize it at 160 °C and a pressure of 18 MPa for 40 minutes to form a fiber - directionally arranged layer with a thickness of 0.3 - 0.4 mm.

[0065] S7. Prepare the ultra - corrosion - resistant layer:

[0066] Weigh 70 - 75 parts by mass of fluororubber and 25 - 30 parts of polytetrafluoroethylene powder, and ball - mill and mix them for 2 hours at a ball - mill rotation speed of 300 revolutions per minute.

[0067] Mold the mixture at 180 °C and a pressure of 25 MPa for 45 minutes to form a dense and pore - free layer with a thickness of 0.2 - 0.3 mm.

[0068] Use diamond nano - polishing liquid to polish the surface at a rotation speed of 2000 revolutions per minute until the surface roughness Ra ≤ 0.1 μm.

[0069] S8. Prepare the high - elasticity heat - conducting layer:

[0070] Weigh 85 - 90 parts by mass of fluororubber and 10 - 15 parts of boron nitride, and mix them in a Banbury mixer at 80 °C for 30 minutes.

[0071] Inject the mixed rubber into a layered cross - linking mold and vulcanize it at 150 °C and a pressure of 12 MPa for 40 minutes to form a layered cross - linked network structure layer with a thickness of 0.3 - 0.4 mm.

[0072] S9. Implement inter - layer bonding and overall assembly:

[0073] Treat each bonding surface with argon plasma, with a treatment power of 100 W and a time of 3 minutes.

[0074] Coat fluorosilicone adhesive in sequence, with a coating amount of 20 - 25 g per square meter, and apply pressure of 0.5 - 1 MPa after layer - by - layer lamination.

[0075] Cure it in an oven in stages: heat at 80 °C for 2 hours in the first stage and heat at 150 °C for 4 hours in the second stage.

[0076] S10. Conduct post - treatment and testing:

[0077] Cut off the overflow glue and check the sensor signal conductivity, with a required resistance value ≤ 5 ohms.

[0078] Spray a perfluoropolyether coating on the surface of the sealing ring, with the spraying thickness ≤ 10 microns, and the curing condition is heating at 120 °C for 1 hour;

[0079] Test the resilience and compression set resistance according to ASTM D395 standard.

[0080] Preferably, the implementation steps of step S10 are: cut off the overflow glue and check the conduction of the sensor signal, with the required resistance value ≤ 5 ohms, spray a perfluoropolyether coating on the surface of the sealing ring, with the spraying thickness ≤ 10 microns, the curing condition is heating at 120 °C for 1 hour, and test the resilience and compression set resistance according to ASTM D395 standard.

[0081] Compared with the prior art, the beneficial effects of the present invention are:

[0082] The high resilience and corrosion-resistant sealing ring of the present invention adopts a 10-layer functionalized hierarchical design. The outer mechanical layer is composed of polytetrafluoroethylene and carbon fiber, and the surface is laser-etched with microgrooves to improve the bonding strength; the second outer airbag layer integrates a silicone rubber-based flexible material and boron nitride, and a 6-channel DATA-52 type air pressure sensor is built in to achieve real-time monitoring with an accuracy of ±0.05 kPa; the middle layer realizes a resilience rate ≥ 98.2% and a high-temperature compression set ≤ 7.3% through differential materials and gradient density design, combined with magnetic field orientation technology and nano-polishing process. At the same time, the preparation process adopts plasma-activated interlayer bonding and directional vulcanization, which has higher production efficiency than traditional processes, is applicable to various scenarios, and the comprehensive performance is significantly better than traditional products.

[0083] Illustration

[0084] Figure 1 Shows an exploded view of the overall structure of the high resilience and corrosion-resistant sealing ring of the present invention;

[0085] Figure 2 Shows a schematic diagram of the overall structure of the high resilience and corrosion-resistant sealing ring of the present invention;

[0086] Figure 3 Shows a schematic diagram of the position of the second outer airbag layer of the high resilience and corrosion-resistant sealing ring of the present invention;

[0087] Figure 4 Shows a schematic diagram of the internal structure of the second outer airbag layer of the high resilience and corrosion-resistant sealing ring of the present invention;

[0088] Figure 5 Shows a flowchart of the preparation method of the high resilience and corrosion-resistant sealing ring of the present invention.

[0089] In the figure:

[0090] 1. Outer mechanical layer A; 2. Sub-outer inflatable airbag layer A; 3. Conductive buffer layer; 4. Thermal compression-resistant layer; 5. High-temperature resistant dynamic layer; 6. Creep-resistant reinforcement layer; 7. Ultra-corrosion-resistant layer; 8. High-elasticity thermal conductive layer; 9. Sub-outer inflatable airbag layer B; 10. Outer mechanical layer B. Detailed implementation manner

[0091] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0092] I. Materials

[0093] Unless otherwise specified, the materials in the present invention are all commercially available:

[0094] Specifically, please refer to Figures 1 to 4 , the present invention proposes a high-rebound corrosion-resistant sealing ring, which sequentially includes an outer mechanical layer A1, a sub-outer inflatable airbag layer A2, a conductive buffer layer 3, a thermal compression-resistant layer 4, a high-temperature resistant dynamic layer 5, a creep-resistant reinforcement layer 6, an ultra-corrosion-resistant layer 7, a high-elasticity thermal conductive layer 8, a sub-outer inflatable airbag layer B9, and an outer mechanical layer B10. The outer mechanical layer A1 and the outer mechanical layer B10 are both made of a polytetrafluoroethylene-based composite material with a thickness of 0.5-1 mm;

[0095] The sub-outer inflatable airbag layer A2 and the sub-outer inflatable airbag layer B9 are both airbag structures made of a silicone rubber-based flexible material, and six microporous air conduction channels are evenly opened inside the sub-outer inflatable airbag layer A2 and the sub-outer inflatable airbag layer B9, and a DATA-52 type air pressure sensor is installed on each channel;

[0096] The conductive buffer layer 3 is made of a fluororubber-based composite material with a honeycomb-like porous structure;

[0097] The thermal compression-resistant layer 4 is made of a fluororubber-based composite material with a gradient arrangement;

[0098] The high-temperature resistant dynamic layer 5 is made of a fluororubber-based composite material with a continuous corrugated structure;

[0099] The creep-resistant reinforcement layer 6 is made of a fluororubber-based composite material with a fiber-oriented arrangement;

[0100] The ultra-corrosion-resistant layer 7 is made of a fluororubber-based composite material with a dense and pore-free structure;

[0101] The high-elasticity thermal conductive layer 8 is made of a fluororubber-based composite material with a layered cross-linked network;

[0102] In this embodiment, it should also be noted that the outer mechanical layer A1 and the outer mechanical layer B10 include the following components by mass parts:

[0103] Polytetrafluoroethylene: 70 - 80 parts;

[0104] Carbon fiber: 20 - 30 parts;

[0105] Laser-etched microgrooves are provided on the surfaces of both the outer mechanical layer A1 and the outer mechanical layer B10;

[0106] In this embodiment, it should also be noted that the high-elasticity heat-conducting layer 8, the sub-outer inflatable airbag layer A2, and the sub-outer inflatable airbag layer B9 include the following components by mass parts:

[0107] Silicone rubber: 85 - 90 parts;

[0108] Boron nitride: 10 - 15 parts;

[0109] Both the sub-outer inflatable airbag layer A2 and the sub-outer inflatable airbag layer B9 are hollow and flat airbags with a thickness of 0.3 - 0.5 mm, and the high-elasticity heat-conducting layer 8 is a solid structure with a thickness of 0.3 - 0.4 mm;

[0110] In this embodiment, it should also be noted that the conductive buffer layer 3 includes the following components by mass parts:

[0111] Fluororubber: 80 - 85 parts;

[0112] Carbon nanotubes: 15 - 20 parts;

[0113] The thickness of the conductive buffer layer 3 is 0.2 - 0.4 mm;

[0114] In this embodiment, it should also be noted that the heat-resistant compression layer 4 includes the following components by mass parts:

[0115] Fluororubber: 85 - 90 parts;

[0116] Graphene: 10 - 15 parts;

[0117] The thickness of the heat-resistant compression layer 4 is 0.2 - 0.3 mm;

[0118] In this embodiment, it should also be noted that the high-temperature resistant dynamic layer 5 includes the following components by mass parts:

[0119] Fluororubber: 80 - 85 parts;

[0120] Silicon dioxide: 15 - 20 parts;

[0121] The thickness of the heat-resistant compression layer 4 is 0.3 - 0.5 mm;

[0122] In this embodiment, it should also be noted that the anti-creep strengthening layer 6 includes the following components by mass:

[0123] Fluororubber: 75 - 80 parts;

[0124] Short carbon fiber: 20 - 25 parts;

[0125] The aspect ratio of the short carbon fiber in the thermal compression resistance layer 4 is 5:1, and the thickness of the thermal compression resistance layer 4 is 0.3 - 0.4 mm;

[0126] In this embodiment, it should also be noted that the ultra-corrosion-resistant layer 7 includes the following components by mass:

[0127] Fluororubber: 70 - 75 parts;

[0128] Polytetrafluoroethylene powder: 25 - 30 parts;

[0129] The outer surface of the ultra-corrosion-resistant layer 7 is treated by nano-polishing, and the thickness is 0.2 - 0.3 mm;

[0130] II. Process

[0131] Please refer to Figure 5 , the present invention also provides a preparation method of a high resilience and corrosion-resistant sealing ring, including the following steps:

[0132] S1. Prepare the outer mechanical layer A and the outer mechanical layer B:

[0133] Weigh 70 - 80 parts of polytetrafluoroethylene and 20 - 30 parts of carbon fiber by mass, place them in a high-speed mixer, and mix at a speed of 2000 - 2500 revolutions per minute for 15 - 20 minutes to ensure uniform dispersion of the carbon fiber;

[0134] Put the mixture into a mold preheated to 360 - 380 °C, apply a pressure of 15 - 20 MPa, keep warm and pressurized for 30 - 40 minutes, demold after cooling to room temperature, and obtain a dense layer with a thickness of 0.5 - 1 mm;

[0135] Use a laser etching machine with a wavelength of 1064 nm and a power of 50 W to process micro-grooves on the surface, with a groove depth of 50 - 80 μm and a groove spacing of 0.2 - 0.3 mm;

[0136] S2. Prepare the sub-outer inflatable airbag layer A and the sub-outer inflatable airbag layer B:

[0137] Weigh 85 - 90 parts of silicone rubber and 10 - 15 parts of boron nitride by mass, and knead them in a mixer at 60 - 80 °C for 30 minutes;

[0138] Inject the mixed rubber into a hollow flat mold and vulcanize it at 120 - 130 °C for 20 - 25 minutes to form an airbag structure with a thickness of 0.3 - 0.5 mm;

[0139] After vulcanization, use laser micro - machining to open 6 microporous air - guiding channels with a pore diameter of 0.1 - 0.2 mm inside the airbag;

[0140] Install DATA - 52 type air pressure sensors in each air - guiding channel, fix and seal them with fluorosilicone adhesive, and the curing condition is heating at 80 °C for 1 hour;

[0141] S3. Prepare the conductive buffer layer:

[0142] Weigh 80 - 85 parts by mass of fluororubber and 15 - 20 parts by mass of carbon nanotubes, add ethanol solvent and disperse them by ultrasonic for 30 minutes. After evaporating the solvent, mix them in a mixer at 80 - 90 °C for 20 minutes;

[0143] Inject the mixed rubber into a honeycomb - shaped mold and vulcanize it at 160 - 170 °C for 25 minutes to form a honeycomb - shaped porous structure layer with a thickness of 0.2 - 0.4 mm;

[0144] S4. Prepare the thermal compression - resistant layer:

[0145] Weigh 85 - 90 parts by mass of fluororubber and 10 - 15 parts by mass of graphene, and mix them in two stages: in the first stage, premix 70% of the fluororubber and all the graphene at 80 °C for 15 minutes, and in the second stage, add the remaining fluororubber and continue to mix at 90 °C for 10 minutes;

[0146] Adopt the layered paving method to lay the inner layer of the high - graphene - content rubber compound and the outer layer of the low - content rubber compound into the mold in sequence, and vulcanize it at 160 °C and 20 MPa for 30 minutes to form a gradient - density layer with a thickness of 0.2 - 0.3 mm;

[0147] S5. Prepare the high - temperature resistant dynamic layer:

[0148] Weigh 80 - 85 parts by mass of fluororubber and 15 - 20 parts by mass of silica, and mix them in a mixer at 90 °C for 20 minutes;

[0149] Inject the mixed rubber into a corrugated mold and vulcanize it at 170 °C and 15 MPa for 35 minutes to form a continuous corrugated structure layer with a thickness of 0.3 - 0.5 mm;

[0150] S6. Prepare the anti - creep strengthening layer:

[0151] Weigh 75 - 80 parts by mass of fluororubber and 20 - 25 parts of short - cut carbon fiber. In a mixer, use the magnetic field orientation technology to align the short - cut carbon fiber with an aspect ratio of 5:1 along the preset direction. The mixing temperature is 85 °C and the time is 25 minutes;

[0152] Place the rubber compound in a directional mold and vulcanize it at 160 °C and a pressure of 18 MPa for 40 minutes to form a fiber - directionally - arranged layer with a thickness of 0.3 - 0.4 mm;

[0153] S7. Prepare the ultra - corrosion - resistant layer:

[0154] Weigh 70 - 75 parts by mass of fluororubber and 25 - 30 parts of polytetrafluoroethylene powder, and ball - mill and mix them for 2 hours at a ball - mill rotation speed of 300 revolutions per minute;

[0155] Mold the mixed material at 180 °C and a pressure of 25 MPa for 45 minutes to form a dense and pore - free layer with a thickness of 0.2 - 0.3 mm;

[0156] Use diamond nano - polishing liquid to polish the surface at a rotation speed of 2000 revolutions per minute until the surface roughness Ra ≤ 0.1 μm;

[0157] S8. Prepare the high - elasticity heat - conductive layer:

[0158] Weigh 85 - 90 parts by mass of fluororubber and 10 - 15 parts of boron nitride, and mix them in a mixer at 80 °C for 30 minutes;

[0159] Inject the mixed rubber into a layered cross - linking mold and vulcanize it at 150 °C and a pressure of 12 MPa for 40 minutes to form a layered cross - linked network structure layer with a thickness of 0.3 - 0.4 mm;

[0160] S9. Implement inter - layer bonding and overall assembly:

[0161] Treat each bonding surface with argon plasma. The treatment power is 100 W and the time is 3 minutes;

[0162] Coat fluorosilicone adhesive in sequence, with a coating amount of 20 - 25 g per square meter, and apply pressure of 0.5 - 1 MPa after layer - by - layer lamination;

[0163] Cure it in an oven in stages: heat at 80 °C for 2 hours in the first stage and heat at 150 °C for 4 hours in the second stage;

[0164] S10. Conduct post - treatment and testing:

[0165] Cut off the overflow glue and check the sensor signal conductivity, with the requirement that the resistance value ≤ 5 ohms;

[0166] Spray a perfluoropolyether coating on the surface of the sealing ring, with a spraying thickness ≤ 10 μm, and the curing condition is heating at 120 °C for 1 hour;

[0167] The rebound rate and compression set resistance are tested according to ASTM D395 standard;

[0168] In this embodiment, it should also be noted that the implementation steps of step S10 are as follows: cut off the overflow glue and check the conduction of the sensor signal, with the requirement that the resistance value ≤ 5 ohms, spray a perfluoropolyether coating on the surface of the sealing ring, with the spraying thickness ≤ 10 microns, and the curing condition is heating at 120 °C for 1 hour, and the rebound rate and compression set resistance are tested according to ASTM D395 standard.

[0169] Example 1

[0170] Prepare a high-rebound and corrosion-resistant sealing ring sample according to the following parameters as a reference sample, including the following specific components:

[0171] In the outer mechanical layer, the ratio of PTFE to carbon fiber is 75:25, in the thermal compression-resistant layer, the ratio of FKM to graphene is 88:12, in the super corrosion-resistant layer, the ratio of FKM to PTFE powder is 72:28, and the vulcanization temperature is 170 °C;

[0172] Specifically, the step process is as follows:

[0173] Prepare each layer according to the standard steps S1 - S10.

[0174] The interlayer bonding and curing process remains the same (80 °C × 2 h + 150 °C × 4 h).

[0175] Example 2

[0176] In this example, prepare a sample according to the following variables:

[0177] In the outer mechanical layer, the ratio of PTFE to carbon fiber is 80:20 (carbon fiber ↓ 5%)

[0178] Specifically, the step process is as follows:

[0179] Preparation of the outer mechanical layer: Mix 80 parts of PTFE and 20 parts of carbon fiber;

[0180] The materials and processes of the remaining layers are exactly the same as those in Example 1.

[0181] Example 3

[0182] In this example, prepare a sample according to the following variables:

[0183] In the thermal compression-resistant layer, the ratio of FKM to graphene is 85:15 (graphene ↑ 3%)

[0184] Specifically, the step process is as follows:

[0185] Preparation of the thermal compression-resistant layer: Knead 85 parts of FKM and 15 parts of graphene.

[0186] The materials and processes of the remaining layers are exactly the same as those in Example 1.

[0187] Example 4

[0188] In this example, samples were prepared according to the following variables: High-temperature resistant dynamic layer vulcanization temperature: 180 °C (↑10 °C)

[0189] Specifically, the step process is as follows:

[0190] Preparation of high-temperature resistant dynamic layer: Raise the vulcanization temperature from 170 °C to 180 °C.

[0191] The material ratios and processes of the other layers are the same as those in Example 1.

[0192] Example 5

[0193] In the ultra-corrosion-resistant layer, the ratio of FKM:PTFE powder is 75:25;

[0194] Specifically, the step process is as follows:

[0195] Preparation of ultra-corrosion-resistant layer: Mix 75 parts of FKM and 25 parts of PTFE powder.

[0196] The parameters and processes of the remaining layers are the same as those in Example 1.

[0197] The sample parameters are shown in Table 1:

[0198] Table 1 Data table of sample parameters for Examples 1 to 5

[0199] Parameter / Example Example 1 Example 2 Example 3 Example 4 Example 5 Outer mechanical layer (PTFE: carbon fiber) 75:25 80:20 75:25 75:25 75:25 Thermal compression resistance layer (FKM: graphene) 88:12 88:12 85:15 88:12 88:12 Ultra corrosion-resistant layer (FKM: PTFE) 72:28 72:28 72:28 72:28 75:25 Vulcanization temperature (dynamic layer) 170℃ 170℃ 170℃ 180℃ 170℃ Normal temperature resilience rate (%) 98.2 96.8 97.1 95.3 97.5 High temperature compression deformation (%) 7.3 10.2 9.1 12.7 8.9

[0200] Performance test:

[0201] The performance of the samples in Examples 1 to 5 was tested through ASTM D395 standard test experiments. The test conditions were:

[0202] Compression ratio: 25%

[0203] Test temperature: Dual conditions of 25 °C (room temperature) and 150 °C (high temperature)

[0204] Compression time: 24 hours

[0205] The test steps are specifically as follows:

[0206] Place the sealing ring specimen in a special fixture, apply pressure until a 25% compression amount is reached, and record the initial height H 0 .

[0207] After maintaining the compressed state for 24 hours, release the pressure, let it stand for 30 minutes, and measure the height H after recovery 1 .

[0208] Calculate the rebound rate R and the compression set C:

[0209]

[0210] The test results are shown in Table 2:

[0211] Table 2 Data of Samples in Examples 1 to 5 in the ASTM D395 Standard Test

[0212] Example Normal temperature resilience rate (%) High temperature resilience rate (%) Normal temperature compression permanent deformation (%) High temperature compression permanent deformation (%) Example 1 98.2 96.5 5.1 7.3 Example 2 96.8 93.7 7.5 10.2 Example 3 97.1 94.4 6.8 9.1 Example 4 95.3 90.6 8.9 12.7 Example 5 97.5 95.8 6.3 8.9

[0213] Analysis conclusion:

[0214] According to the test results, it can be seen that for the samples in Example 1 after the test, in terms of materials:

[0215] The carbon fiber content is moderate (25 parts), taking into account anti-wear and toughness. In Example 2, the decrease in carbon fiber leads to a decrease in mechanical strength and a decrease in the rebound rate;

[0216] A graphene ratio of 12 parts achieves the best thermal conductivity-elasticity balance. In Example 3, when the graphene increases to 15 parts, the layer rigidity increases and the rebound rate decreases;

[0217] Ultra-corrosion-resistant layer (72:28 FKM:PTFE powder): 28 parts of PTFE powder form a dense protective film. In Example 5, when the PTFE decreases to 25 parts, the chemical corrosion resistance decreases and the high-temperature compression deformation increases;

[0218] In terms of process:

[0219] The vulcanization temperature of 170°C: ensures sufficient cross-linking of fluororubber. In Example 4, when the temperature rises to 180°C, over-vulcanization is triggered, the elastic network is damaged, and the high-temperature rebound rate decreases significantly;

[0220] In summary, the sample parameters of Example 1, by balancing the material components and process parameters, are superior to other examples in terms of the rebound rate (98.2% at room temperature and 96.5% at high temperature) and the compression set (5.1% at room temperature and 7.3% at high temperature). The comprehensive performance meets the requirements of extreme working conditions.

[0221] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0222] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A high resilience corrosion resistant sealing ring, the sealing ring comprising in sequence an outer mechanical layer A (1), a sub-outer inflatable airbag layer A (2), a conductive buffer layer (3), a heat resistant compression layer (4), a high temperature resistant dynamic layer (5), an anti-creep reinforcement layer (6), an ultra-corrosion resistant layer (7), a high elasticity heat conductive layer (8), a sub-outer inflatable airbag layer B (9) and an outer mechanical layer B (10), characterized in that: The outer mechanical layer A (1) and the outer mechanical layer B (10) are both made of a polytetrafluoroethylene-based composite material with a thickness of 0.5-1 mm; The sub-outer inflatable airbag layer A (2) and the sub-outer inflatable airbag layer B (9) are both airbag structures made of silicone rubber-based flexible materials, and six microporous air guide channels are evenly opened inside the sub-outer inflatable airbag layer A (2) and the sub-outer inflatable airbag layer B (9), and each of the channels is equipped with a DATA-52 type air pressure sensor; The conductive buffer layer (3) is made of a fluororubber-based composite material with a honeycomb porous structure; The heat-resistant compression layer (4) is made of a gradient-arranged fluororubber-based composite material; The high temperature resistant dynamic layer (5) is made of a fluororubber-based composite material with a continuous corrugated structure; The anti-creep reinforcement layer (6) is made of a fluororubber-based composite material with directional fiber arrangement; The super corrosion-resistant layer (7) is made of a dense, non-porous fluororubber-based composite material; The high elasticity heat conductive layer (8) is made of a fluororubber-based composite material with a layered cross-linked network.

2. A high resilience corrosion-resistant sealing ring according to claim 1, characterized in that: The outer mechanical layer A (1) and the outer mechanical layer B (10) comprise the following components in parts by mass: Polytetrafluoroethylene: 70-80 parts; Carbon fiber: 20-30 parts; The outer mechanical layer A (1) and the outer mechanical layer B (10) are both provided with laser-etched microgrooves on their surfaces.

3. A high resilience corrosion-resistant sealing ring according to claim 2, characterized in that: The high elasticity heat conductive layer (8), the sub-outer inflatable airbag layer A (2) and the sub-outer inflatable airbag layer B (9) comprise the following components in parts by mass: Silicone rubber: 85-90 parts; Boron nitride: 10-15 parts; The sub-outer inflatable airbag layer A (2) and the sub-outer inflatable airbag layer B (9) are both hollow flat airbags with a thickness of 0.3-0.5 mm, and the high elasticity heat conductive layer (8) is a solid structure with a thickness of 0.3-0.4 mm.

4. The high resilience corrosion-resistant sealing ring according to claim 1, characterized in that: The conductive buffer layer (3) comprises the following components in parts by mass: Fluororubber: 80-85 parts; Carbon nanotubes: 15-20 parts; The thickness of the conductive buffer layer (3) is 0.2-0.4 mm.

5. A high resilience corrosion-resistant sealing ring according to claim 4, characterized in that: The heat-resistant compression layer (4) comprises the following components in parts by mass: Fluororubber: 85-90 parts; Graphene: 10-15 parts; The thickness of the heat-resistant compression layer (4) is 0.2-0.3 mm.

6. A high resilience corrosion-resistant sealing ring according to claim 4, characterized in that: The high temperature resistant dynamic layer (5) comprises the following components in parts by mass: Fluororubber: 80-85 parts; Silicon dioxide: 15-20 parts; The thickness of the heat-resistant compression layer (4) is 0.3-0.5 mm.

7. The high resilience corrosion-resistant sealing ring according to claim 1, characterized in that: The anti-creep reinforcement layer (6) comprises the following components in parts by mass: Fluororubber: 75-80 parts; Chopped carbon fiber: 20-25 parts; The aspect ratio of the chopped carbon fibers in the heat-resistant compression layer (4) is 5:1, and the thickness of the heat-resistant compression layer (4) is 0.3-0.4 mm.

8. The high resilience corrosion-resistant sealing ring according to claim 1, characterized in that: The super corrosion resistant layer (7) comprises the following components in parts by mass: Fluororubber: 70-75 parts; Polytetrafluoroethylene powder: 25-30 parts; The outer surface of the super corrosion-resistant layer (7) is nano-polished and has a thickness of 0.2-0.3 mm.

9. A method for preparing a high resilience corrosion-resistant sealing ring, according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Prepare the outer mechanical layer A and the outer mechanical layer B; S2. Prepare the sub-outer inflatable airbag layer A and the sub-outer inflatable airbag layer B; S3. Preparing a conductive buffer layer; S4. Preparation of heat-resistant compression layer; S5. Preparation of high temperature resistant dynamic layer; S6. Preparing a creep-resistant reinforcement layer; S7. Prepare a super corrosion-resistant layer; S8. Preparing a highly elastic thermal conductive layer; S9. Implement interlayer bonding and overall assembly; S10. Perform post-processing and testing.

10. The method for preparing a high resilience corrosion-resistant sealing ring according to claim 9, characterized in that: The implementation steps of step S10 are: cutting off the overflowed glue and checking the conductivity of the sensor signal, requiring the resistance value to be ≤5 ohms, spraying a perfluoropolyether coating on the surface of the sealing ring, the spraying thickness to be ≤10 microns, the curing condition to be heated at 120 degrees Celsius for 1 hour, and testing the rebound rate and compression set resistance according to ASTM D395 standard.

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