Wear-resistant sealing gasket with double-end-face composite strengthening structure

Abstract

The utility model relates to the technical field of sealing gaskets, in particular to a wear-resistant sealing gasket with a double-end-face composite reinforced structure, which comprises a sealing gasket body and a supporting buffer device, the sealing gasket body comprises a nano ceramic particle reinforced composite layer, a metal fiber reinforced elastic matrix layer and a self-lubricating polymer composite layer, the upper end and the lower end of the sealing gasket body are both designed in a corrugated mode, the attaching degree between the sealing gasket body and a contact face is increased, good sealing performance is guaranteed, in addition, a supporting buffering device arranged in the sealing gasket can provide necessary elastic support when pressure changes, and the sealing gasket is not prone to deformation. And the outer surfaces of the upper end and the lower end of the sealing gasket body are both provided with the wear-resistant and corrosion-resistant coatings, so that the service life of the sealing gasket is prolonged, and the stability of the sealing gasket can be kept in a severe working environment.

Description

Technical Field

[0001] This utility model relates to the field of sealing gasket technology, specifically to a wear-resistant sealing gasket with a double-end composite reinforced structure. Background Technology

[0002] As is well known, gaskets are a key component in industrial production and equipment maintenance, and are crucial for ensuring the normal operation of systems or equipment. Although traditional sealing materials and technologies can meet basic sealing requirements to a certain extent, they often reveal problems such as poor wear resistance, insufficient pressure resistance, and easy aging when faced with extreme working conditions such as high pressure, high temperature, and corrosive media. This leads to increased leakage risk, reduced equipment efficiency, and may even cause serious safety accidents. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a wear-resistant sealing gasket with a double-end composite reinforced structure.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant sealing gasket with a double-end composite reinforcement structure, comprising a sealing gasket body and a support and buffer device. The sealing gasket body comprises a nano-ceramic particle reinforced composite layer, a metal fiber reinforced elastic matrix layer, and a self-lubricating polymer composite layer. The upper and lower ends of the sealing gasket body are respectively provided with the nano-ceramic particle reinforced composite layer, the metal fiber reinforced elastic matrix layer, and the self-lubricating polymer composite layer from the two ends inward. Both the upper and lower ends of the sealing gasket body adopt a corrugated design. Both the upper and lower outer surfaces of the sealing gasket body are provided with a wear-resistant and corrosion-resistant coating. A cylindrical cavity is formed in an annular shape inside the sealing gasket body, and the support and buffer device is installed inside the cylindrical cavity.

[0007] Furthermore, the present invention is improved in that the supporting buffer device includes a supporting cylinder, a sliding rod, a spring, and a supporting layer. The supporting cylinder is installed inside the cylindrical cavity. The sliding rod is slidably installed at both ends of the supporting cylinder. A supporting layer is installed at the end of each of the two sets of sliding rods away from the supporting cylinder. The spring is sleeved on the outer wall of the supporting cylinder and the sliding rod. The two ends of the spring are respectively connected to the side wall of the two sets of supporting layers near the supporting cylinder.

[0008] Furthermore, the present invention is improved in that the nano-ceramic particle reinforced composite layer comprises a gradient combination of Al2O3 and SiC, wherein the volume fraction of SiC decreases from the contact surface to the bonding surface along the thickness direction, and the gradient change rate is 30%-70%.

[0009] Furthermore, the present invention is improved in that the metal fiber reinforced elastic matrix layer is made of stainless steel wire mesh and fluororubber composite.

[0010] Furthermore, an improvement of this invention is that the self-lubricating polymer composite layer is made of PTFE + graphene filling.

[0011] Furthermore, the present invention is improved in that the wear-resistant and corrosion-resistant coating is a TiN or CrN coating with a thickness of 0.01 mm to 0.1 mm.

[0012] Furthermore, the present invention is improved in that the outer diameter of the sealing gasket body ranges from 50mm to 500mm, and the inner diameter ranges from 30mm to 400mm.

[0013] Furthermore, the present invention is improved in that the wave crest height of the corrugated design is 0.5mm to 2mm, and the wave pitch is 2mm to 5mm.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a wear-resistant sealing gasket with a double-end composite reinforced structure, which has the following beneficial effects:

[0016] This wear-resistant gasket with a double-end composite reinforced structure, through a combination of a nano-ceramic particle reinforced composite layer, a metal fiber reinforced elastic matrix layer, and a self-lubricating polymer composite layer, possesses excellent elasticity and adaptability. It can effectively fill the tiny irregularities in the joints, ensuring a reliable sealing effect. The nano-ceramic particle reinforced composite layer uses a gradient combination of Al2O3 and SiC, providing excellent wear resistance. Furthermore, the higher SiC content on the side closer to the contact surface enhances surface hardness. The wear-resistant and corrosion-resistant TiN or CrN coating on the outer surface further improves the gasket's durability in harsh environments. The corrugated design increases the fit with the contact surface, improving sealing efficiency. Through optimized material combination and structural design, the gasket can maintain stable performance during long-term use, reducing the risk of leakage.

[0017] This wear-resistant gasket with a double-end composite reinforced structure provides a robust internal framework through the combined action of the support and buffer device, support cylinder, slide bar, and support layer. This enhances the overall structural strength of the gasket, enabling it to maintain shape stability under high pressure and preventing irreversible deformation. By providing additional mechanical support, the support and buffer device helps maintain the sealing performance of the gasket during long-term use, ensuring a tight seal between the gasket and the contact surface even under large pressure fluctuations or continuous high pressure, thus reducing the possibility of leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a three-dimensional cross-sectional structural diagram of the sealing gasket body of this utility model;

[0020] Figure 3 In this utility model Figure 2 A magnified structural diagram of part A;

[0021] Figure 4 In this utility model Figure 2 A magnified structural diagram of part B.

[0022] In the figure: 1. Sealing gasket body; 2. Nano-ceramic particle reinforced composite layer; 3. Metal fiber reinforced elastic matrix layer; 4. Self-lubricating polymer composite layer; 5. Wear-resistant and corrosion-resistant coating; 6. Cylindrical cavity; 7. Support cylinder; 8. Slide rod; 9. Spring; 10. Support layer. Detailed Implementation

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

[0024] Please see Figure 1-4A wear-resistant sealing gasket with a double-end composite reinforcement structure includes a sealing gasket body 1 and a support and buffer device. The sealing gasket body 1 includes a nano-ceramic particle reinforced composite layer 2, a metal fiber reinforced elastic matrix layer 3, and a self-lubricating polymer composite layer 4. The upper and lower ends of the sealing gasket body 1 are respectively provided with the nano-ceramic particle reinforced composite layer 2, the metal fiber reinforced elastic matrix layer 3, and the self-lubricating polymer composite layer 4 from the ends inwards. Both the upper and lower ends of the sealing gasket body 1 adopt a corrugated design. The outer surfaces of both the upper and lower ends of the sealing gasket body 1 are provided with a wear-resistant and corrosion-resistant coating 5. A cylindrical cavity 6 is annularly formed inside the sealing gasket body 1, and the support and buffer device is installed inside the cylindrical cavity 6. In this embodiment, during use, a sealing gasket of appropriate size is first selected according to the specific requirements of the equipment and installed between the corresponding connecting parts. Due to the corrugated design at both ends, the fit with the contact surface is increased, ensuring good sealing performance. In addition, the support and buffer device inside the sealing gasket can provide necessary elastic support when the pressure changes, ensuring the stability of the sealing gasket under different working conditions. The outer surface is coated with a wear-resistant and corrosion-resistant coating 5, which not only improves the service life of the gasket but also maintains stable performance in harsh working environments. Through the combination of a nano-ceramic particle reinforced composite layer 2, a metal fiber reinforced elastic matrix layer 3, and a self-lubricating polymer composite layer 4, the gasket possesses excellent elasticity and adaptability, effectively filling small irregularities in joints and providing a reliable sealing effect. The nano-ceramic particle reinforced composite layer, when applied to the upper and lower end faces of the gasket, effectively resists external wear, especially in high-wear environments, providing stronger durability. The metal fiber reinforced elastic matrix layer provides the necessary strength and elasticity for the gasket, making it less prone to deformation under pressure and able to quickly return to its original shape after pressure release. The presence of the self-lubricating polymer composite layer 4 reduces friction problems that the gasket may encounter during operation, reducing maintenance frequency and costs. The corrugated design increases the contact area between the gasket and the contact surface, improving sealing efficiency, while the support and buffer device inside the cylindrical cavity 6 further enhances the gasket's adaptability to changes in external pressure, enabling it to be used under a wider range of working conditions.

[0025] Preferably, in this embodiment, the support and buffer device includes a support cylinder 7, sliding rods 8, springs 9, and support layers 10. The support cylinder 7 is installed inside the cylindrical cavity 6. Sliding rods 8 are slidably mounted on both ends of the support cylinder 7. Support layers 10 are installed on the ends of the two sets of sliding rods 8 away from the support cylinder 7. Springs 9 are sleeved on the outer walls of the support cylinder 7 and the sliding rods 8. The two ends of the springs 9 are respectively connected to the side walls of the two sets of support layers 10 near the support cylinder 7. When there is no external pressure, the support cylinder 7 is located inside the cylindrical cavity 6, the springs 9 are at their natural length or slightly pre-tensioned, and the sliding rods 8 extend from both ends of the support cylinder 7 and are connected to the support layers 10 through the springs 9. The contact surfaces are coated with lubricating oil. When the gasket is subjected to external pressure, the support layer 10 is the first to contact and bear the pressure. As the pressure increases, the support layer 10 compresses the slide bar 8 inward, causing the spring 9 to be compressed. Due to the presence of the spring 9, this design can effectively absorb and disperse the pressure, preventing the gasket body 1 from being damaged by instantaneous high pressure. Once the external pressure decreases or disappears, the restoring force of the spring 9 will push the support layer 10 back to its original position, allowing the gasket to also return to its original shape. This characteristic helps maintain the long-term effective sealing performance of the gasket. The support cylinder 7, slide bar 8, and support layer 10 work together to provide a robust internal frame for the gasket, enhancing its structural strength and preventing irreversible deformation under high pressure.

[0026] Preferably, in this embodiment, the nano-ceramic particle-reinforced composite layer 2 comprises a gradient combination of Al2O3 and SiC, wherein the volume fraction of SiC decreases along the thickness direction from the contact surface to the bonding surface, with a gradient change rate of 30%-70%. The SiC content is higher near the contact surface. Due to the excellent hardness and wear resistance of SiC, it can effectively resist external wear, which makes the gasket exhibit stronger durability in the face of high wear environments. As the volume fraction of SiC decreases towards the bonding surface, the material gradually transitions to Al2O3 as the main component. Although Al2O3 is slightly less hard than SiC, it has better toughness, which helps to absorb and disperse impact force, thereby reducing the risk of crack propagation and improving the reliability of the overall structure. By controlling the gradient change rate of the SiC volume fraction (30%-70%), a smoother transition of the coefficient of thermal expansion and elastic modulus can be achieved between different layers, reducing the problem of internal stress concentration caused by abrupt changes in material properties, and further reducing the possibility of material failure.

[0027] Preferably, in this embodiment, the metal fiber reinforced elastic matrix layer 3 is made of stainless steel wire mesh and fluororubber composite. The stainless steel wire mesh provides strong physical support and tensile strength, significantly enhancing the overall strength and durability of the matrix layer. This allows the gasket to maintain structural integrity and functional stability under high pressure and high stress environments. Fluororubber, as a high-performance elastomer material, has excellent flexibility and resilience. When combined with stainless steel wire mesh, it not only retains its own elastic characteristics but also achieves faster and more complete shape recovery after pressure release with the support of the metal mesh, ensuring long-term effective sealing performance.

[0028] Preferably, in this embodiment, the self-lubricating polymer composite layer 4 is made of PTFE + graphene filling. The PTFE + graphene filling self-lubricating polymer composite layer 4 located in the middle layer can effectively reduce the friction of the middle part of the sealing gasket body under the action of force. PTFE itself has a very low coefficient of friction, while the addition of graphene further improves the smoothness and wear resistance of the material surface, reduces the wear between moving parts, and extends the service life of the sealing gasket.

[0029] Preferably, in this embodiment, the wear-resistant and corrosion-resistant coating 5 is a TiN or CrN coating with a thickness of 0.01 mm to 0.1 mm. Both TiN and CrN coatings have extremely high hardness (the Vickers hardness of TiN is about 2400-2600 HV, and that of CrN is about 1500-2000 HV), which enables them to provide excellent protection in high-wear environments. These coatings can effectively resist scratches, abrasions and erosion, and extend the service life of the gaskets. TiN and CrN coatings are not only hard, but also have good chemical stability and can resist the erosion of various acid and alkali media. This characteristic is particularly suitable for the harsh working environments of industries such as chemical, oil and gas, where equipment is often exposed to corrosive substances.

[0030] Preferably, in this embodiment, the outer diameter of the sealing gasket body 1 ranges from 50mm to 500mm, and the inner diameter ranges from 30mm to 400mm. By providing a variety of size options from small to large, this sealing gasket can be matched with most standard and non-standard flanges, pipes, and other connection components on the market. This reduces customization requirements, lowers costs, and speeds up the installation process. The diverse size selection makes this sealing gasket suitable for various mechanical equipment interfaces of different specifications. Whether it is a small precision instrument or a large industrial equipment, a suitable sealing gasket size can be found to ensure a tight fit and effective seal.

[0031] Preferably, in this embodiment, the corrugated design has a crest height of 0.5mm to 2mm and a wave pitch of 2mm to 5mm. The corrugated design allows the gasket to better adapt to uneven or slightly deformed mating surfaces. By adjusting the crest height and wave pitch, a tight fit can be ensured even when there are minor surface defects, thereby improving the sealing effect. The corrugated structure increases the actual contact area between the gasket and the mating surface. Compared to a flat design, this helps to disperse the applied pressure, form a more uniform sealing layer, and reduce the possibility of leakage. Appropriate crest height (0.5mm to 2mm) and wave pitch (2mm to 5mm) can effectively disperse pressure and avoid sealing failure caused by local stress concentration. This design can provide good pressure compensation capability while ensuring sufficient elastic recovery force.

[0032] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant sealing gasket with a double-end composite reinforced structure, comprising a sealing gasket body (1) and a supporting buffer device, characterized in that: The sealing gasket body (1) includes a nano-ceramic particle reinforced composite layer (2), a metal fiber reinforced elastic matrix layer (3), and a self-lubricating polymer composite layer (4). The sealing gasket body (1) is provided with the nano-ceramic particle reinforced composite layer (2), the metal fiber reinforced elastic matrix layer (3), and the self-lubricating polymer composite layer (4) from the upper and lower ends inward. The upper and lower ends of the sealing gasket body (1) are both corrugated. The outer surfaces of the upper and lower ends of the sealing gasket body (1) are provided with wear-resistant and corrosion-resistant coatings (5). The sealing gasket body (1) has a cylindrical cavity (6) in an annular shape. The support and buffer device is installed in the cylindrical cavity (6).

2. The wear-resistant sealing gasket with a double-end-face composite reinforcement structure according to claim 1, characterized in that: The support and buffer device includes a support cylinder (7), a slide rod (8), a spring (9), and a support layer (10). The support cylinder (7) is installed inside the cylindrical cavity (6). The slide rod (8) is slidably installed at both ends of the support cylinder (7). The support layer (10) is installed at the ends of the two sets of slide rods (8) away from the support cylinder (7). The spring (9) is sleeved on the outer wall of the support cylinder (7) and the slide rod (8). The two ends of the spring (9) are respectively connected to the side wall of the two sets of support layers (10) near the support cylinder (7).

3. The wear-resistant sealing gasket with a double-end composite reinforced structure according to claim 2, characterized in that: The nano-ceramic particle reinforced composite layer (2) contains a gradient combination of Al2O3 and SiC, wherein the volume fraction of SiC decreases from the contact surface to the bonding surface along the thickness direction, with a gradient change rate of 30%-70%.

4. The wear-resistant sealing gasket with a double-end-face composite reinforcement structure according to claim 3, characterized in that: The metal fiber reinforced elastic matrix layer (3) is made of stainless steel wire mesh and fluororubber composite.

5. The wear-resistant sealing gasket with a double-end-face composite reinforcement structure according to claim 4, characterized in that: The self-lubricating polymer composite layer (4) is made of PTFE + graphene.

6. The wear-resistant sealing gasket with a double-end-face composite reinforcement structure according to claim 5, characterized in that: The wear-resistant and corrosion-resistant coating (5) is a TiN or CrN coating with a thickness of 0.01 mm to 0.1 mm.

7. The wear-resistant sealing gasket with a double-end-face composite reinforcement structure according to claim 6, characterized in that: The outer diameter of the sealing gasket body (1) ranges from 50mm to 500mm, and the inner diameter ranges from 30mm to 400mm.

8. The wear-resistant sealing gasket with a double-end-face composite reinforcement structure according to claim 7, characterized in that: The corrugated design has a crest height of 0.5 mm to 2 mm and a wave pitch of 2 mm to 5 mm.

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