High-wear-resistance rubber sealing element and manufacturing method thereof

Abstract

The invention discloses a high-wear-resistance rubber sealing element and a manufacturing method thereof, and relates to the technical field of rubber sealing elements, the high-wear-resistance rubber sealing element comprises a sealing ring, the sealing ring is provided with textures, the textures comprise annular textures and radial textures, the annular textures are located at the edge part, initially making contact with a sealing surface, of the sealing ring, the textures are shallower in depth, and the radial textures are located at the edge part. The depth is gradually increased along with the extension towards the interior of the sealing element, the radial textures are distributed on the annular textures at intervals, and the annular textures and the radial textures are filled with lubricating agents; according to the sealing ring, the lubricating agent in the annular textures and the radial textures and the lubricating agent are effectively utilized through the special texture structure, so that the friction coefficient between the sealing ring and the sealing face is remarkably reduced, and the friction coefficient is greatly reduced in the long-term dynamic sealing process such as rotating shaft sealing or reciprocating motion piston sealing application. And the loss of the rubber material caused by friction is greatly reduced, so that the service life of the sealing element is greatly prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of rubber seals, in particular to a highly wear-resistant rubber seal and a manufacturing method thereof. Background Art

[0002] Rubber seals play a vital role in many industrial fields, such as automobile manufacturing, aerospace, mechanical engineering, chemical production, and energy. They are widely used in the joints of various equipment, gaps between moving parts, etc., to prevent leakage of working media such as liquids and gases, and ensure the sealing, stability, and normal operation of the system.

[0003] Traditional rubber materials themselves have limited wear resistance. Under long-term, high-frequency friction, the rubber surface gradually wears out, the dimensional accuracy of the seal decreases, the sealing gap increases, and ultimately leads to leakage of the sealing medium and seal failure.

[0004] Moreover, in some working environments containing foreign particles (such as dust, metal debris, etc.), these impurities will be mixed between the seal and the sealing surface, acting as abrasive particles, aggravating the degree of wear and further shortening the service life of the seal.

[0005] In view of this, this application is hereby filed. Summary of the invention

[0006] The object of the present invention is to provide a highly wear-resistant rubber seal and a manufacturing method thereof to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides a high wear-resistant rubber seal, including a sealing ring, which is provided with textures, and the textures include annular textures and radial textures. The annular texture is shallow at the edge portion where the sealing ring initially contacts the sealing surface, and the depth gradually increases as it extends toward the interior of the seal. The radial textures are distributed at intervals on the annular texture, and the annular texture and radial texture are both filled with lubricant.

[0008] Furthermore, a plurality of reinforcing ribs are arranged on the sealing ring along its circumferential direction, and the reinforcing ribs include first reinforcing ribs and second reinforcing ribs, and the first reinforcing ribs and the second reinforcing ribs are arranged alternately.

[0009] Furthermore, the first reinforcing rib and the second reinforcing rib are of trapezoidal cross-section, with arc-shaped transitions at both ends.

[0010] Furthermore, the distance between two adjacent reinforcing ribs is one fifth of the circumference of the sealing ring.

[0011] Furthermore, the sealing ring includes a rubber layer, which is composed of 40 parts of natural rubber, 20 parts of nitrile rubber, 30 parts of carbon black, 10 parts of white carbon black, 5 parts of wear resistance agent, 2 parts of vulcanizer, 1 part of accelerator, 1 part of antioxidant, and 5 parts of softener.

[0012] Furthermore, a ceramic coating is provided on the outer side of the rubber layer, and the ceramic coating is silicon carbide ceramic particles, which are applied by a spraying process.

[0013] Furthermore, an elastic buffer layer is arranged between the rubber layer and the ceramic coating, and the elastic buffer layer is made of polyurethane foam.

[0014] Furthermore, the outer surface of the reinforcing rib is in contact with the sealing surface, and the outer surface of the reinforcing rib is provided with micro grooves along its length direction.

[0015] A method for manufacturing a rubber seal, applied to any of the above-mentioned high wear-resistant rubber seals, specifically comprising the following steps: S1. Weigh the raw materials according to the above weight parts, and plasticize the natural rubber and the nitrile rubber on an open mill at a plasticizing temperature of 40-60° C. for 5-10 minutes to obtain a plasticized rubber; S2, adding the plasticized rubber into an internal mixer, and then sequentially adding carbon black, white carbon black, anti-wear agent, antioxidant, and softener, the mixing temperature is 80-100° C., the mixing time is 8-15 minutes, and a section of mixed rubber is obtained; S3, after cooling a section of the mixed rubber to room temperature, adding a vulcanizing agent and an accelerator, mixing on an open mixing mill, the mixing temperature is 40-60° C., the mixing time is 3-6 minutes, and the final mixed rubber is obtained; S4. Put the final rubber into the mold and vulcanize it on a flat vulcanizer. The vulcanization temperature is 150-180℃, the vulcanization pressure is 10-15MPa, and the vulcanization time is determined according to the thickness of the seal. The vulcanization time (minutes) = the thickness of the seal (mm) × (1.5-2.0); S5. Trim, clean and inspect the seals after vulcanization to obtain qualified high-wear-resistant rubber seals.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the lubricant in the annular texture and radial texture and the special texture structure are used to effectively utilize the lubricant, so that the friction coefficient between the sealing ring and the sealing surface is significantly reduced. In the long-term dynamic sealing process, such as rotating shaft sealing or reciprocating piston sealing applications, the loss of rubber material due to friction is greatly reduced, thereby greatly extending the service life of the seal.

[0017] In the present invention, the staggered first reinforcing ribs and the second reinforcing ribs and their trapezoidal cross-section design significantly improve the sealing ring's resistance to high pressure. Under high pressure conditions, the seal can maintain the stability of its shape and size, effectively preventing sealing failure due to excessive deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a highly wear-resistant rubber seal; Figure 2 This is a schematic diagram of the internal structure of a highly wear-resistant rubber seal; Figure 3 for Figure 1 The enlarged view of point A in the middle; Figure 4 for Figure 2 The enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the cross-sectional structure of a highly wear-resistant rubber seal.

[0019] In the figure: 1. sealing ring; 101. rubber layer; 102. ceramic coating; 103. elastic buffer layer; 2. texture; 201. annular texture; 202. radial texture; 3. reinforcing rib; 301. first reinforcing rib; 302. second reinforcing rib. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-5 , the present invention provides a technical solution: A highly wear-resistant rubber seal comprises a sealing ring 1, wherein the sealing ring 1 is provided with a texture 2, wherein the texture 2 comprises an annular texture 201 and a radial texture 202, wherein the annular texture 201 is located at the edge portion where the sealing ring 1 initially contacts a sealing surface, the depth of the texture 2 is relatively shallow, and the depth gradually increases as the texture 2 extends toward the interior of the seal, the radial texture 202 is spaced apart on the annular texture 201, and the annular texture 201 and the radial texture 202 are both filled with lubricant.

[0022] When the sealing ring 1 starts to contact the sealing surface, the annular texture 201 located at the edge and having a shallow depth first acts on the sealing surface.

[0023] This shallow depth design makes the contact softer, reducing friction and risk of wear during initial contact.

[0024] At the same time, due to the existence of texture 2, a small amount of lubricant can be captured and stored at the moment of contact. The lubricant comes from the trace grease pre-existing in the sealing system or the lubricating substance applied during the assembly process.

[0025] As the pressure gradually increases during the sealing process, the structure of the annular texture 201 extending toward the inside of the seal and gradually increasing in depth begins to function.

[0026] The change in depth causes the internal space of Texture 2 to deform, like a miniature pressure pump, gradually squeezing the stored lubricant toward the sealing surface.

[0027] This dynamic lubricant supply mechanism can continuously form a thin and uniform lubricating film between the sealing surfaces, effectively reducing the friction coefficient between the rubber and the sealing surface.

[0028] The radial textures 202 spaced apart on the annular texture 201 play a key role in drainage.

[0029] When the seal is subjected to radial pressure or has relative radial movement, the radial texture 202 can more efficiently distribute the lubricant in the annular texture 201 to the entire sealing surface, thereby ensuring uniform lubrication.

[0030] In addition, during the sealing process, the radial texture 202 can act like a tiny scraper to scrape up tiny impurity particles that may exist on the sealing surface and guide them to the edge of the seal, preventing these impurity particles from accumulating between the sealing surfaces, thereby avoiding abrasive wear caused by impurities and further protecting the sealing surface and the sealing ring 1 itself.

[0031] The lubricant in the annular texture 201 and the radial texture 202 and the effective use of the lubricant by the structure can significantly reduce the friction coefficient between the sealing ring 1 and the sealing surface.

[0032] In the long-term dynamic sealing process, such as in the rotating shaft sealing or reciprocating piston sealing applications, the loss of rubber material due to friction is reduced, thereby greatly extending the service life of the seal.

[0033] Compared with traditional seals without grooves or chemical lubrication, the wear rate can be reduced by 30%-50% under the same working conditions.

[0034] The radial texture 202 scrapes away and drains the foreign particles on the sealing surface, effectively preventing the occurrence of abrasive wear.

[0035] In some industrial environments, such as working media environments containing impurities such as dust and metal debris, this texture 2 structure can keep the sealing surface clean, reduce the possibility of foreign particles embedding in the rubber surface and causing scratches and wear during relative movement, and further improve the wear resistance of the seal in harsh environments.

[0036] The design of the annular texture 201 gradually increasing in depth from the edge to the inside enables the sealing ring 1 to maintain good contact with the sealing surface under different pressure conditions.

[0037] Under low pressure, the shallow edge part can provide sufficient flexible contact to ensure the sealing effect; under high pressure, the texture 2 part with increased internal depth can better adapt to pressure deformation, fill the sealing gap and prevent leakage of the sealing medium.

[0038] This adaptive contact mode improves the stability and reliability of the seal, and can effectively reduce the risk of leakage and ensure the normal operation of the sealing system, whether in static or dynamic sealing scenarios.

[0039] The radial texture 202 evenly drains the lubricant, which indirectly leads to even distribution of sealing pressure. Due to even lubrication, the friction force on the sealing surface of the sealing ring 1 is also more even, thus avoiding sealing failure caused by excessive or insufficient local pressure.

[0040] For example, in the sealing application of large hydraulic equipment, this uniform pressure distribution can effectively prevent hydraulic oil leakage caused by poor sealing, thereby improving the operating safety and stability of the equipment.

[0041] Furthermore, a plurality of reinforcing ribs 3 are arranged on the sealing ring 1 along its circumferential direction, and the reinforcing ribs 3 include first reinforcing ribs 301 and second reinforcing ribs 302 , and the first reinforcing ribs 301 and the second reinforcing ribs 302 are arranged alternately.

[0042] The first reinforcing rib 301 and the second reinforcing rib 302 are trapezoidal in cross section, with arc-shaped transitions at both ends.

[0043] The distance between two adjacent reinforcing ribs 3 is one fifth of the circumference of the sealing ring 1 .

[0044] The outer surface of the reinforcing rib 3 contacts the sealing surface, and the outer surface of the reinforcing rib 3 is provided with micro grooves along its length direction.

[0045] The first reinforcing ribs 301 and the second reinforcing ribs 302 are arranged alternately. When the sealing ring 1 is under pressure, this arrangement forms a mutually supporting network structure.

[0046] When external pressure acts on the sealing ring 1 , for example in a high-pressure sealing environment, the pressure will be evenly dispersed along the staggered reinforcing ribs 3 .

[0047] The trapezoidal cross-section design enables the reinforcing rib 3 to better withstand pressure, and its wider bottom can effectively transfer the pressure to the rubber matrix, while the narrower top reduces local stress concentration when contacting the sealing surface.

[0048] For example, in a hydraulic system, when the liquid pressure is as high as tens or even hundreds of MPa, the staggered reinforcing ribs 3 can act like a solid frame to prevent the sealing ring 1 from excessive deformation and ensure that it maintains a good sealing shape.

[0049] The first reinforcing rib 301 and the second reinforcing rib 302 have arc-shaped transitions at both ends, thereby avoiding stress concentration points caused by right-angled or sharp edges when subjected to force.

[0050] During pressure changes or dynamic sealing, the arc-shaped transition can smoothly distribute the stress between the reinforcing rib 3 and the rubber matrix, reducing the risk of fatigue or rupture of the rubber material due to stress concentration.

[0051] The outer surface of the reinforcing rib 3 is provided with micro grooves along its length direction. Before the seal works or in the initial working stage, the micro grooves can store a certain amount of lubricant, which can be grease applied during assembly or a trace amount of lubricating medium naturally existing in the sealing system.

[0052] When the seal starts to work, especially in the dynamic sealing process, with the relative movement between the reinforcing rib 3 and the sealing surface, the lubricant in the micro-groove will gradually seep out, forming a thin lubricating film between the reinforcing rib 3 and the sealing surface.

[0053] For example, in a rotating shaft seal, as the shaft rotates, the lubricant in the microgrooves is continuously brought to the contact surface, which reduces the friction coefficient and reduces the wear of the reinforcing rib 3 and the sealing surface.

[0054] During the sealing process, the microgrooves can also collect and remove foreign particles.

[0055] When there are tiny foreign particles on the sealing surface, the microgrooves can accommodate these particles during the relative movement, preventing them from rolling or scratching between the sealing surface and the reinforcing rib 3, thereby protecting the flatness of the sealing surface and the surface quality of the reinforcing rib 3, further maintaining good sealing performance and reducing the risk of wear.

[0056] The distance between two adjacent reinforcing ribs 3 is one fifth of the circumference of the sealing ring 1 . Such uniform spacing ensures that the sealing ring 1 is subjected to uniform force in the circumferential direction.

[0057] Whether in the static sealing or dynamic sealing process, the pressure can be evenly distributed on each reinforcing rib 3 and the rubber part between them, avoiding sealing failure or uneven wear caused by excessive or insufficient local pressure.

[0058] For example, in a reciprocating piston seal application, the evenly distributed reinforcing ribs 3 can ensure that the sealing ring 1 always maintains a stable sealing performance during the reciprocating motion of the piston, and will not leak or wear out prematurely due to uneven force.

[0059] The staggered first reinforcing ribs 301 and the second reinforcing ribs 302 and their trapezoidal cross-section design significantly improve the resistance of the sealing ring 1 to high pressure.

[0060] Under high pressure environment, the seal can maintain the stability of its shape and size, effectively preventing seal failure due to excessive deformation.

[0061] Compared with similar seals without the reinforcing rib 3, the maximum allowable working pressure can be increased by 30%-50% in a high pressure test.

[0062] The arc-shaped transition reinforcing rib 3 structure reduces stress concentration, thereby improving the fatigue resistance of the seal.

[0063] In long-term dynamic sealing work, such as in sealing applications of mechanical equipment with frequent starts and stops, seals can withstand more pressure cycles without being easily cracked or damaged, extending the service life of seals and reducing equipment maintenance costs and downtime.

[0064] The lubricant in the micro grooves on the outer surface of the reinforcing rib 3 continuously reduces the friction coefficient between the seal and the sealing surface during operation.

[0065] In various dynamic sealing applications, such as sealing of rotating equipment and reciprocating devices, this not only reduces energy loss and improves the operating efficiency of the equipment, but also reduces the wear rate of seals and sealing surfaces. Compared with ordinary seals, under the same working conditions, the friction coefficient can be reduced by 20%-40%.

[0066] The microgrooves can collect and remove foreign particles, effectively reducing abrasive wear caused by foreign particles.

[0067] In some harsh working environments, such as industrial occasions containing impurities such as dust and metal debris, seals can maintain good sealing performance and low wear rate, improving the reliability and durability of seals under complex working conditions.

[0068] The appropriate spacing between adjacent reinforcing ribs 3 ensures uniform distribution of the sealing pressure in the circumferential direction, so that the seal can provide a stable and reliable sealing effect on the entire sealing surface.

[0069] Whether in the application of circular sealing surface or special-shaped sealing surface, it can effectively prevent local leakage and improve the overall sealing and stability of the sealing system.

[0070] Taking into account the advantages of the above-mentioned reinforcing rib 3 structure in terms of strength, friction and pressure distribution, the sealing performance of the seal can remain stable over a long period of time.

[0071] During long-term operation, such as in the sealing of continuously running equipment on industrial production lines, the need for frequent replacement of seals due to deterioration of sealing performance is reduced, thereby improving production efficiency and the continuity of equipment operation.

[0072] Furthermore, the sealing ring 1 includes a rubber layer 101, and the rubber layer 101 is composed of 40 parts of natural rubber, 20 parts of nitrile rubber, 30 parts of carbon black, 10 parts of white carbon black, 5 parts of wear resistance agent, 2 parts of vulcanizer, 1 part of accelerator, 1 part of antioxidant, and 5 parts of softener.

[0073] The outer side of the rubber layer 101 is provided with a ceramic coating 102 , and the ceramic coating 102 is silicon carbide ceramic particles, which are applied by a spraying process.

[0074] An elastic buffer layer 103 is disposed between the rubber layer 101 and the ceramic coating 102 , and the elastic buffer layer 103 is made of polyurethane foam.

[0075] The rubber layer 101 is made of a blend of natural rubber and nitrile rubber.

[0076] Natural rubber provides good elasticity and flexibility, enabling it to adapt to slight deformations and irregularities of the sealing surface under different sealing conditions, ensuring a tight fit and achieving effective sealing.

[0077] The nitrile rubber gives the rubber layer 101 excellent oil resistance and certain wear resistance, so that it can work stably in an environment containing oil media and is not easily corroded by oil and lose its sealing performance.

[0078] For example, in the oil seal application of automobile engines, the rubber layer 101 can be flexibly deformed with the operation of the engine and the thermal expansion and contraction of the components, and can also withstand long-term immersion in engine oil.

[0079] Carbon black and white carbon black are used as fillers, and their tiny particles are evenly dispersed in the rubber matrix.

[0080] Carbon black can form strong physical adsorption and chemical bonding with rubber molecules, enhancing the cross-linked network structure of the rubber, thereby improving the strength, hardness and wear resistance of the rubber.

[0081] Silica has a higher specific surface area, which further enhances the tear strength and wear resistance of rubber, while improving the heat resistance and aging resistance of rubber.

[0082] The addition of the anti-wear agent is specifically aimed at the wear resistance requirements of the seal, and further improves the wear resistance of the rubber layer 101 during the friction process.

[0083] For example, in the reciprocating seal of industrial machinery, the filler and the anti-wear agent work together to reduce the material loss caused by frequent friction between the rubber layer 101 and the sealing surface.

[0084] Vulcanizers and accelerators promote the vulcanization reaction of rubber to form a stable three-dimensional cross-linked network structure.

[0085] This enables the rubber layer 101 to have sufficient strength and elastic recovery ability, so that it can quickly return to its original shape after repeated deformation and maintain sealing performance.

[0086] The antioxidant can capture free radicals generated by heat, oxygen, light and other factors during the use of rubber, inhibit the oxidation chain reaction, delay the aging process of rubber, and ensure the performance stability of the rubber layer 101 in long-term use.

[0087] Softeners improve the processing properties of rubber, making it easier to operate during the manufacturing process such as mixing and molding. At the same time, they also improve the cold resistance of rubber to a certain extent, so that the seals can still maintain good elasticity in low temperature environments, avoiding seal failure due to low temperature hardening.

[0088] The elastic buffer layer 103 is made of polyurethane foam and is located between the rubber layer 101 and the ceramic coating 102 .

[0089] When the seal is subjected to external pressure shocks, such as sudden pressure surges in hydraulic systems or impact forces generated by mechanical vibrations, polyurethane foam can absorb and disperse this energy through its own elastic deformation.

[0090] It is like a miniature shock absorber, converting the instantaneous high-pressure impact into a more moderate pressure change, protecting the rubber layer 101 from being damaged by the sudden high pressure, and maintaining the structural integrity and sealing performance of the rubber layer 101.

[0091] The elasticity of polyurethane foam also enables it to adapt to microscopic irregularities in the sealing surface.

[0092] In actual applications, it is difficult for the sealing surface to be absolutely smooth and flat, and there may be some tiny bumps or scratches.

[0093] The elastic buffer layer 103 can fill these tiny gaps, so that the ceramic coating 102 and the rubber layer 101 can better contact the sealing surface, ensure that the sealing pressure is evenly distributed, and improve the sealing effect.

[0094] For example, at the sealing point of a large pipeline connection, even if there is a certain processing error on the pipeline sealing surface, the elastic buffer layer 103 can help the seal to achieve reliable sealing.

[0095] The ceramic coating 102 is silicon carbide ceramic particles coated on the outside of the rubber layer 101 through a spraying process.

[0096] Silicon carbide ceramics have extremely high hardness and wear resistance. During the friction between the seal and the sealing surface, the ceramic coating 102 directly bears most of the friction and wear.

[0097] The internal rubber layer 101 is effectively protected, and the wear of the rubber material is greatly reduced.

[0098] For example, in the sealing application of a high-speed rotating shaft, the ceramic coating 102 can resist the strong friction generated by the high-speed relative motion between the shaft and the seal, thereby extending the service life of the seal.

[0099] The silicon carbide ceramic coating 102 also has good chemical stability and high temperature resistance.

[0100] In some harsh chemical environments, such as where acidic or alkaline solutions or strong oxidizing media exist, the ceramic coating 102 can prevent these chemicals from corroding the rubber layer 101 and maintain the chemical stability of the seal.

[0101] Under high temperature conditions, such as high temperature equipment sealing in the metallurgical industry, the ceramic coating 102 can withstand high temperatures, preventing the rubber layer 101 from softening, aging or decomposing due to high temperatures, and ensuring the normal operation of the seal in a high temperature environment.

[0102] The wear-resistant components (carbon black, white carbon black, and wear-resistant agent) in the rubber layer 101 are combined with the high-hardness silicon carbide ceramics in the ceramic coating 102 to form a multi-layered wear-resistant system.

[0103] Under different degrees of friction conditions, the rubber layer 101 can provide certain buffering and basic wear resistance, while the ceramic coating 102 takes on the main wear resistance task in high friction and harsh environments.

[0104] This synergistic effect enables the seal to maintain an extremely low wear rate under various friction conditions. Compared with traditional single rubber seals, the wear can be reduced by 50%-80%, greatly extending the service life of the seal.

[0105] The hardness of the ceramic coating 102 can effectively resist the scratching and wear of the seal by abrasive particles (such as metal debris, sand particles, etc.) that may exist on the sealing surface.

[0106] Even in a working medium containing a large amount of abrasive particles, the ceramic coating 102 can prevent these abrasive particles from being embedded in the rubber layer 101, thereby avoiding seal failure due to abrasive wear, and further improving the reliability and durability of the seal in harsh environments.

[0107] The elasticity and flexibility of the rubber layer 101 and the adaptation of the elastic buffer layer 103 to the sealing surface jointly improve the sealing performance of the seal.

[0108] The rubber layer 101 can fit the sealing surface tightly, while the elastic buffer layer 103 ensures uniform sealing pressure distribution under different sealing surface conditions, thereby effectively preventing leakage of the sealing medium.

[0109] Whether in static sealing or dynamic sealing applications, it can provide stable and reliable sealing effects, reducing equipment failures and energy losses caused by poor sealing.

[0110] The presence of the ceramic coating 102 not only protects the rubber layer 101 , but also can maintain the shape and dimensional accuracy of the seal during long-term use due to its own stability and corrosion resistance.

[0111] This helps to maintain a good fit between the seal and the sealing surface so that the sealing performance will not decrease due to wear or deformation of the seal over a long period of time, thereby improving the sealing durability of the seal and reducing the maintenance frequency and cost of the equipment.

[0112] The chemical stability of the ceramic coating 102, the oil resistance of the nitrile rubber in the rubber layer 101, and the anti-chemical aging effect of the antioxidant enable the seal to work normally in a variety of chemical media environments.

[0113] Whether in acidic, alkaline or oily environments, seals are not prone to chemical corrosion, swelling or degradation, which broadens the application range of seals and can meet the requirements of chemical resistance of seals in different industrial fields.

[0114] The high temperature resistance of the ceramic coating 102 and the improved cold resistance of the softener in the rubber layer 101 enable the seal to adapt to a wider temperature range.

[0115] In a high temperature environment, the ceramic coating 102 protects the rubber layer 101 from being damaged, while in a low temperature environment, the rubber layer 101 can still maintain good elasticity, ensuring that the seal can work stably in an environment with extreme temperature changes from low to high temperatures, which is of great significance in sealing applications in fields such as aerospace, polar equipment or high-temperature industrial furnaces.

[0116] A method for manufacturing a rubber seal, applied to any of the above-mentioned high wear-resistant rubber seals, specifically comprising the following steps: S1. Weigh the raw materials according to the above weight parts, and plasticize the natural rubber and the nitrile rubber on an open mill at a plasticizing temperature of 40-60° C. for 5-10 minutes to obtain a plasticized rubber; S2, adding the plasticized rubber into an internal mixer, and then sequentially adding carbon black, white carbon black, anti-wear agent, antioxidant, and softener, the mixing temperature is 80-100° C., the mixing time is 8-15 minutes, and a section of mixed rubber is obtained; S3, after cooling a section of the mixed rubber to room temperature, adding a vulcanizing agent and an accelerator, mixing on an open mixing mill, the mixing temperature is 40-60° C., the mixing time is 3-6 minutes, and the final mixed rubber is obtained; S4. Put the final rubber into the mold and vulcanize it on a flat vulcanizer. The vulcanization temperature is 150-180℃, the vulcanization pressure is 10-15MPa, and the vulcanization time is determined according to the thickness of the seal. The vulcanization time (minutes) = the thickness of the seal (mm) × (1.5-2.0); S5. Trim, clean and inspect the seals after vulcanization to obtain qualified high-wear-resistant rubber seals.

Claims

1. A highly wear-resistant rubber seal, comprising a sealing ring (1), characterized in that: The sealing ring (1) is provided with a texture (2), wherein the texture (2) comprises an annular texture (201) and a radial texture (202); the annular texture (201) is located at the edge portion where the sealing ring (1) initially contacts the sealing surface; the texture (2) is shallow in depth and gradually increases in depth as it extends toward the inside of the sealing member; the radial textures (202) are spaced apart on the annular texture (201); and the annular texture (201) and the radial texture (202) are both filled with lubricant.

2. A highly wear-resistant rubber seal according to claim 1, characterized in that: A plurality of reinforcing ribs (3) are arranged on the sealing ring (1) along its circumferential direction, the reinforcing ribs (3) comprising first reinforcing ribs (301) and second reinforcing ribs (302), the first reinforcing ribs (301) and the second reinforcing ribs (302) being arranged alternately.

3. A highly wear-resistant rubber seal according to claim 2, characterized in that: The first reinforcing rib (301) and the second reinforcing rib (302) are of trapezoidal cross-section, with arc-shaped transitions at both ends.

4. A highly wear-resistant rubber seal according to claim 3, characterized in that: The distance between two adjacent reinforcing ribs (3) is one fifth of the circumference of the sealing ring (1).

5. A highly wear-resistant rubber seal according to claim 4, characterized in that: The sealing ring (1) comprises a rubber layer (101), wherein the rubber layer (101) is composed of 40 parts of natural rubber, 20 parts of nitrile rubber, 30 parts of carbon black, 10 parts of white carbon black, 5 parts of anti-wear agent, 2 parts of vulcanizing agent, 1 part of accelerator, 1 part of antioxidant, and 5 parts of softener.

6. A highly wear-resistant rubber seal according to claim 5, characterized in that: A ceramic coating (102) is provided on the outer side of the rubber layer (101), and the ceramic coating (102) is silicon carbide ceramic particles and is applied by a spraying process.

7. A highly wear-resistant rubber seal according to claim 6, characterized in that: An elastic buffer layer (103) is provided between the rubber layer (101) and the ceramic coating (102), and the elastic buffer layer (103) is made of polyurethane foam.

8. A highly wear-resistant rubber seal according to claim 7, characterized in that: The outer surface of the reinforcing rib (3) contacts the sealing surface, and the outer surface of the reinforcing rib (3) is provided with micro grooves along its length direction.

9. A method for manufacturing a rubber seal, characterized in that: The highly wear-resistant rubber seal according to any one of claims 1 to 8 above, the specific steps include: S1. Weigh the raw materials according to the above weight parts, and plasticize the natural rubber and the nitrile rubber on an open mill at a plasticizing temperature of 40-60° C. for 5-10 minutes to obtain a plasticized rubber; S2, adding the plasticized rubber into an internal mixer, and then sequentially adding carbon black, white carbon black, anti-wear agent, antioxidant, and softener, the mixing temperature is 80-100° C., the mixing time is 8-15 minutes, and a section of mixed rubber is obtained; S3, after cooling a section of the mixed rubber to room temperature, adding a vulcanizing agent and an accelerator, mixing on an open mixing mill, the mixing temperature is 40-60° C., the mixing time is 3-6 minutes, and the final mixed rubber is obtained; S4. Put the final rubber into the mold and vulcanize it on a flat vulcanizer. The vulcanization temperature is 150-180℃, the vulcanization pressure is 10-15MPa, and the vulcanization time is determined according to the thickness of the seal. The vulcanization time (minutes) = the thickness of the seal (mm) × (1.5-2.0); S5. Trim, clean and inspect the seals after vulcanization to obtain qualified high-wear-resistant rubber seals.

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