Oil-resistant fluorine rubber aramid fiber composite sealing ring structure

Abstract

The utility model discloses an oil -resistant type fluorine rubber aramid fiber composite sealing ring structure relates to the technical field of fluorine rubber sealing ring, including the outer layer, the middle layer and the inner layer, the inside of outer layer and the outside of middle layer rotation cooperation connection, the inside of middle layer and the outside of inner layer rotation cooperation connection, be equipped with the oil return groove on the inner layer, and the oil return groove is arranged in the inside of inner layer in spiral shape, and the outside and the inside are made of fluorine rubber, and the middle layer is made of aramid fiber. Three layer rotation cooperation structure has effectively solved the friction and abrasion problem of traditional integrated sealing ring under the rotating condition, and the relative rotation between layers disperses friction stress, reduces surface scratch, damage such as block, prolongs the service life of sealing ring. Spiral oil return groove can actively recover the leakage medium, reduces the risk of oil leakage, prevents the invasion of external impurities at the same time, guarantees the internal cleanliness of equipment, reduces the wear and corrosion of parts.

Description

Technical Field

[0001] This utility model relates to the technical field of fluororubber sealing rings, specifically to an oil-resistant fluororubber-aramid fiber composite sealing ring structure. Background Technology

[0002] Fluororubber seals are ring-shaped sealing elements made primarily of fluororubber, widely used in various mechanical devices requiring sealing. Fluororubber is a synthetic rubber containing fluorine atoms in its molecular chain, possessing excellent high and low temperature resistance (can be used for extended periods in a temperature range of -20℃ to 200℃ or even higher), oil resistance (good resistance to swelling and stability against various oil media such as mineral oil, hydraulic oil, and fuel oil), chemical corrosion resistance (resistant to the erosion of various acids, alkalis, solvents, and other chemicals), as well as good aging resistance and sealing performance.

[0003] Existing fluororubber sealing rings typically feature a one-piece, fixed design, which is unsuitable for applications requiring rotation. After being installed under compression, the fluororubber sealing ring forms a rigid fit with the sealing surface, preventing relative rotation.

[0004] When applied to applications requiring rotation (such as rotary shaft seals and gearbox end cover seals), continuous friction occurs between the sealing ring and the rotating components. This friction accumulates over time, leading to gradual wear on the sealing ring surface, resulting in scratches, chips, or even tears. As wear intensifies, the gap between the sealing ring and the sealing surface gradually increases, disrupting the previously tight seal. This not only causes oil leakage, affecting the normal lubrication and operation of the equipment, but also allows external impurities (such as dust and moisture) to intrude, further accelerating the wear and corrosion of internal components and severely reducing the seal quality and the equipment's lifespan. Utility Model Content

[0005] This invention provides an oil-resistant fluororubber-aramid fiber composite sealing ring structure, which solves the problem in existing technologies where, in applications requiring rotation (such as rotary shaft seals and gearbox end cover seals), continuous friction occurs between the sealing ring and the rotating component. This friction accumulates with increasing rotation time, leading to gradual wear on the sealing ring surface, resulting in scratches, chips, or even tears. As wear intensifies, the gap between the sealing ring and the sealing surface gradually increases, disrupting the original tight seal. This not only causes oil leakage, affecting the normal lubrication and operation of the equipment, but also allows external impurities (such as dust and moisture) to intrude due to seal failure, further accelerating the wear and corrosion of internal components and severely reducing the sealing quality and service life of the equipment.

[0006] An oil-resistant fluororubber-aramid fiber composite sealing ring structure includes an outer layer, a middle layer, and an inner layer. The inner side of the outer layer is rotatably connected to the outer side of the middle layer, and the inner side of the middle layer is rotatably connected to the outer side of the inner layer. An oil return groove is formed on the inner layer, and the oil return groove is arranged in a spiral shape on the inner side of the inner layer. Both the outer and inner sides are made of fluororubber, and the middle layer is made of aramid fiber.

[0007] According to one embodiment of the present invention, a first locking block is fixedly provided on the outer side of the intermediate layer, and a first locking groove that cooperates with the first locking block is provided on the inner side of the outer layer.

[0008] According to one embodiment of the present invention, the first card block has a circular structure, and the first card block is rotatably connected to the first card slot.

[0009] According to one embodiment of the present invention, a second locking block is fixedly provided on the inner side of the intermediate layer, and a second locking groove that cooperates with the second locking block is provided on the outer side of the inner layer.

[0010] According to one embodiment of the present invention, the second card block has a circular structure, and the second card block is rotatably connected to the second card slot.

[0011] According to one embodiment of the present invention, the outer layer is made of a fluororubber matrix and carbon fiber thermoplastic.

[0012] According to one embodiment of the present invention, the intermediate layer is made of aromatic polyamide fiber.

[0013] According to one embodiment of the present invention, the inner layer is thermoplasticized from fluororubber and graphene.

[0014] According to one embodiment of the present invention, the oil return groove is a 45° oblique spiral groove.

[0015] According to one embodiment of the present invention, the depth of the oil return groove is 0.2-0.3 mm, and the width of the oil return groove is 0.5 mm.

[0016] The advantages of this utility model compared to the prior art are:

[0017] The three-layer rotating mating structure effectively solves the friction and wear problem of traditional one-piece sealing rings under rotating conditions. By dispersing frictional stress through relative rotation between layers, it reduces surface scratches, chips, and other damage, extending the service life of the sealing ring. The spiral oil return groove actively recovers leaked media, reducing the risk of oil leaks while preventing external impurities from entering, ensuring the cleanliness of the equipment's interior and reducing component wear and corrosion. The combination of the oil resistance of the outer fluororubber layer and the reinforcement of the middle aramid fiber layer allows the sealing ring to maintain good sealing performance and structural strength even in harsh environments such as high temperatures and oil immersion. This broadens its application range in sealing rotating components such as rotating shafts and gearboxes, improving the reliability of equipment operation.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a three-dimensional structural diagram of an oil-resistant fluororubber-aramid fiber composite sealing ring.

[0021] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 4 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 5 This is a three-dimensional structural diagram of the present invention.

[0025] The reference numerals in the figures include:

[0026] 1. Outer layer; 2. Middle layer; 3. Inner layer; 4. Oil return groove; 5. First locking block; 6. First locking slot; 7. Second locking block; 8. Second locking slot; 9. Angled spiral groove. Detailed Implementation

[0027] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0028] like Figures 1 to 5As shown, an oil-resistant fluororubber-aramid fiber composite sealing ring structure includes an outer layer 1, a middle layer 2, and an inner layer 3. The inner side of the outer layer 1 is rotatably connected to the outer side of the middle layer 2, and the inner side of the middle layer 2 is rotatably connected to the outer side of the inner layer 3. An oil return groove 4 is provided on the inner layer 3, and the oil return groove 4 is arranged in a spiral shape on the inner side of the inner layer 3. Both the outer and inner sides are made of fluororubber, and the middle layer 2 is made of aramid fiber.

[0029] This oil-resistant fluororubber-aramid fiber composite sealing ring achieves stable sealing under rotational conditions through a three-layer structure design consisting of an outer layer 1, a middle layer 2, and an inner layer 3. The outer layer 1 and the middle layer 2, as well as the middle layer 2 and the inner layer 3, are rotate-fitted connections. When applied to rotating applications, each layer can rotate relative to the rotating component, transforming traditional rigid friction into relative sliding between layers, significantly reducing friction loss. The spiral oil return groove 4 on the inner side of the inner layer 3 utilizes centrifugal force during rotation to guide leaked oil back to the sealing cavity along a spiral trajectory. Simultaneously, the fluororubber material ensures the sealing ring's resistance to swelling in oily media, while the aramid fiber-reinforced middle layer 2 enhances the overall structure's wear resistance and tear resistance, collectively maintaining sealing stability.

[0030] The three-layer rotating mating structure effectively solves the friction and wear problem of traditional one-piece sealing rings under rotating conditions. By dispersing frictional stress through relative rotation between layers, it reduces surface scratches, chips, and other damage, extending the service life of the sealing ring. The spiral oil return groove 4 actively recovers leaked media, reducing the risk of oil leaks while preventing external impurities from entering, ensuring the cleanliness of the equipment's interior, and reducing component wear and corrosion. The combination of the oil resistance of the outer fluororubber layer 1 and the reinforcement of the middle aramid fiber layer 2 allows the sealing ring to maintain good sealing performance and structural strength even in harsh environments such as high temperatures and oil immersion. This broadens its application range in sealing rotating components such as rotating shafts and gearboxes, improving the reliability of equipment operation.

[0031] According to one embodiment of this utility model, a first locking block 5 is fixedly disposed on the outer side of the intermediate layer 2, and a first locking groove 6 that cooperates with the first locking block 5 is formed on the inner side of the outer layer 1. The first locking block 5 on the outer side of the intermediate layer 2 is embedded into the first locking groove 6 on the inner side of the outer layer 1, forming a rotational engagement, which restricts the axial displacement of the outer layer 1 and the intermediate layer 2 while allowing relative rotation between them. When the sealing ring is in the rotational state, the first locking block 5 slides smoothly in the first locking groove 6, ensuring smooth rotation between layers and avoiding relative displacement that affects the seal. This structure enhances the connection stability between the outer layer 1 and the intermediate layer 2, prevents separation between layers during rotation, and does not hinder relative rotation, ensuring reduced friction loss and improving the structural reliability of the sealing ring during rotation.

[0032] According to one embodiment of this utility model, the first locking block 5 has a circular ring structure, and the first locking block 5 is rotatably connected to the first locking groove 6. The circular first locking block 5 and the corresponding first locking groove 6 are fully fitted together. During rotation, the locking block is evenly stressed along the circumference of the groove, making the relative rotation between the outer layer 1 and the middle layer 2 more stable and avoiding wear or jamming caused by excessive local stress. The circular ring structure makes the interlayer stress uniform, reduces frictional resistance and local wear during rotation, extends the service life of the first locking block 5 and the first locking groove 6, and further ensures the stability of the interlayer rotational fit.

[0033] According to one embodiment of this utility model, a second locking block 7 is fixedly provided on the inner side of the intermediate layer 2, and a second locking groove 8 that cooperates with the second locking block 7 is provided on the outer side of the inner layer 3. The second locking block 7 on the inner side of the intermediate layer 2 cooperates with the second locking groove 8 on the outer side of the inner layer 3 to realize the rotational connection between the intermediate layer 2 and the inner layer 3, restricting their axial movement while allowing relative rotation, making the movement between the layers more coordinated when the three-layer structure rotates. This structure strengthens the connection between the intermediate layer 2 and the inner layer 3, prevents the inner layer 3 from shifting during rotation, ensures that the spiral oil return groove 4 of the inner layer 3 can accurately play its oil guiding role, and at the same time ensures smooth rotation between layers and reduces friction loss.

[0034] According to one embodiment of this utility model, the second locking block 7 has a circular ring structure, and the second locking block 7 is rotatably connected to the second locking groove 8. The circular second locking block 7 is in full contact with the second locking groove 8, and the locking block slides evenly along the circumference of the groove during rotation, making the relative rotation of the intermediate layer 2 and the inner layer 3 more stable and avoiding rotational obstruction caused by irregular shape of the locking block. The circular ring structure makes the force on the intermediate layer 2 and the inner layer 3 more balanced, reducing frictional resistance and local wear during rotation, ensuring the normal operation of the oil return groove 4 of the inner layer 3, and improving the overall stability and durability of the sealing ring.

[0035] According to one embodiment of this utility model, the outer layer 1 is thermoplasticized from a fluororubber matrix and carbon fiber. The fluororubber matrix ensures the oil resistance and sealing performance of the outer layer 1, while the carbon fiber enhances its mechanical strength and wear resistance. Under rotational conditions, the outer layer 1 can resist the erosion of oily media, withstand friction with adjacent components, and rotate smoothly relative to the intermediate layer 2. This outer layer 1 material combines the oil resistance advantages of fluororubber with the high strength and wear resistance of carbon fiber, improving the wear resistance and structural stability of the outer layer 1 and extending the overall service life of the sealing ring.

[0036] According to one embodiment of this utility model, the intermediate layer 2 is made of aromatic polyamide fiber. Aromatic polyamide fiber (aramid) has high wear resistance and tear resistance. As the intermediate layer 2, it can withstand frictional stress when the layers rotate relative to each other, while providing structural support for the sealing ring as a whole, and working with the outer layer 1 and inner layer 3 to achieve a stable seal. The properties of aramid material enhance the wear resistance and tear resistance of the intermediate layer 2, effectively cope with the friction generated by the rotation between layers, and improve the structural strength and durability of the sealing ring under long-term rotation conditions.

[0037] According to one embodiment of this utility model, the inner layer 3 is thermoplasticized from fluororubber and graphene. Fluororubber ensures the oil resistance and sealing properties of the inner layer 3, while graphene enhances its thermal conductivity and wear resistance. During rotation, the inner layer 3 prevents oil leakage and quickly dissipates heat generated by friction, reducing aging caused by high temperatures, while also allowing for smooth relative rotation with the intermediate layer 2. The addition of graphene improves the thermal conductivity and wear resistance of the inner layer 3, reduces the impact of high temperatures generated by rotational friction on the material, extends the service life of the inner layer 3, and ensures the oil guiding effect of the spiral oil return groove 4.

[0038] According to one embodiment of this utility model, the oil return groove 4 is a 45° angled spiral groove 9. The 45° angled spiral oil return groove 4 is adapted to the rotation direction, allowing for more efficient use of centrifugal force during rotation to quickly guide leaked oil media back to the sealing cavity along the angled spiral trajectory, reducing media residue. The 45° angled design optimizes oil return efficiency, enabling faster recovery of leaked media, reducing the risk of oil leakage, and simultaneously enhancing the blocking effect on impurities, thus improving sealing reliability.

[0039] According to one embodiment of this utility model, the depth of the oil return groove 4 is 0.2-0.3 mm, and the width of the oil return groove 4 is 0.5 mm. This size of oil return groove 4 can accommodate a certain amount of leaked oil medium without excessively weakening the structural strength of the inner layer 3. During rotation, the medium flows smoothly within the groove and is guided back through a spiral trajectory. Simultaneously, the groove size ensures effective contact between the inner layer 3 and the sealing surface. The reasonable groove depth and width balance the oil return capacity and the structural strength of the inner layer 3, ensuring the oil return effect while preventing damage to the inner layer 3 due to an excessively large groove, thus improving the overall performance and durability of the sealing ring.

[0040] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An oil-resistant fluororubber-aramid fiber composite sealing ring structure, characterized in that, It includes an outer layer (1), a middle layer (2) and an inner layer (3). The inner side of the outer layer (1) is rotatably connected to the outer side of the middle layer (2), and the inner side of the middle layer (2) is rotatably connected to the outer side of the inner layer (3). The inner layer (3) is provided with an oil return groove (4), and the oil return groove (4) is arranged in a spiral shape on the inner side of the inner layer (3). The outer and inner sides are both made of fluororubber, and the middle layer (2) is made of aramid fiber.

2. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 1, characterized in that, The outer side of the intermediate layer (2) is fixedly provided with a first card block (5), and the inner side of the outer layer (1) is provided with a first card slot (6) that cooperates with the first card block (5).

3. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 2, characterized in that, The first card block (5) has a circular structure and is rotatably connected to the first card slot (6).

4. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 1, characterized in that, The inner side of the intermediate layer (2) is fixedly provided with a second card block (7), and the outer side of the inner layer (3) is provided with a second card slot (8) that cooperates with the second card block (7).

5. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 4, characterized in that, The second card block (7) has a circular structure and is rotatably connected to the second card slot (8).

6. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 1, characterized in that, The outer layer (1) is made of fluororubber matrix and carbon fiber thermoplastic.

7. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 1, characterized in that, The intermediate layer (2) is made of aromatic polyamide fibers.

8. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 1, characterized in that, The inner layer (3) is made of thermoplasticized fluororubber and graphene.

9. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 1, characterized in that, The oil return groove (4) is a 45° angled spiral groove (9).

10. The oil-resistant fluororubber-aramid fiber composite sealing ring structure as described in claim 1, characterized in that, The depth of the oil return groove (4) is 0.2-0.3 mm, and the width of the oil return groove (4) is 0.5 mm.

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