High-performance rubber sealing ring

Abstract

The utility model relates to the technical field of sealing elements, in particular to a high-performance rubber sealing ring which comprises an inner layer, a middle layer and an outer layer which are distributed from inside to outside, the inner layer is made of hard plastic materials, the outer layer is made of wear-resistant rubber materials, and the middle layer is made of rubber composite materials. The middle layer is higher than the inner layer and the outer layer, and the two ends of the middle layer protrude out of the inner layer and the outer layer. According to the high-performance rubber sealing ring, the inner layer, the middle layer and the outer layer are connected in a hot-pressing bonding mode and the like, so that the high-performance rubber sealing ring can keep good sealing performance when facing different pressure, temperature and medium environments, it is jointly ensured that the sealing ring can effectively prevent liquid and gas from leaking, and even under the severe working conditions of high pressure, high temperature and the like, the sealing performance is good. And a good and stable sealing effect can be maintained.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to a high-performance rubber sealing ring. Background Technology

[0002] Rubber seals form a sealing barrier between two relatively moving or stationary components, preventing liquid or gaseous media from leaking out of the sealed area and ensuring the system's tightness and integrity. For example, in automotive engine systems, rubber seals are used to seal engine oil, coolant, and fuel systems, preventing leaks of these vital fluids and ensuring normal engine operation.

[0003] The equipment faces various extreme and complex working conditions, such as high temperature, high pressure, strong corrosion, and high wear. Ordinary rubber seals are prone to performance degradation and shortened lifespan under these conditions, failing to meet the requirements for long-term stable operation of the equipment.

[0004] Specifically, ordinary rubber materials are prone to aging, hardening, and brittleness at high temperatures, leading to a decline in sealing performance. For example, when the operating temperature exceeds 100℃, the elasticity and flexibility of nitrile rubber seals will significantly decrease, resulting in cracking, deformation, and other problems, making it impossible to maintain a good sealing effect. In applications where the seals need to move frequently or rub against other components, ordinary rubber seals have insufficient wear resistance, easily leading to wear and shedding. This not only affects the sealing effect but may also cause wear particles to enter the equipment, triggering other malfunctions. Summary of the Invention

[0005] The purpose of this invention is to provide a high-performance rubber sealing ring to improve sealing performance.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A high-performance rubber sealing ring includes an inner layer, a middle layer, and an outer layer distributed from the inside out. The inner layer is made of a hard material, the outer layer is made of a wear-resistant material, and the middle layer is made of a composite material. The height of the middle layer is greater than the height of the inner and outer layers, and both ends of the middle layer protrude from the inner and outer layers.

[0008] Furthermore, the thickness of the intermediate layer accounts for 50%-70% of the total thickness of the sealing ring; the thickness of the outer layer accounts for 15%-25% of the total thickness of the sealing ring; and the thickness of the inner layer accounts for 15%-25% of the total thickness of the sealing ring.

[0009] Furthermore, the inner layer and the intermediate layer, and the intermediate layer and the outer layer are connected by applying an adhesive and using a hot-pressing process; the wavy inner surface crest of the intermediate layer is embedded in the annular groove on the outer surface of the inner layer. The wavy outer surface crest of the intermediate layer is embedded in the annular groove on the inner surface of the outer layer.

[0010] Furthermore, the rigid material is polyoxymethylene or modified polyphenylene ether; the wear-resistant material is polyurethane rubber; and the composite material includes hydrogenated nitrile rubber and silicon dioxide.

[0011] Furthermore, annular grooves are provided on both the upper and lower sides of the intermediate layer. The width of one end of the annular groove opening is smaller than the width of the other end, and a reinforcing rib is provided at the wider end inside the annular groove.

[0012] Furthermore, an annular groove is provided on the arc-shaped sidewall of the sealable ring, and a connecting frame can be provided between the inner and outer sealing rings distributed inside and outside, with the edge of the connecting frame extending into the annular groove of the inner and outer sealing rings.

[0013] Furthermore, the connecting frame includes an inner ring plate and an outer ring plate distributed inside and outside, and multiple connecting plates are fixedly arranged between the inner ring plate and the outer ring plate, with the multiple connecting plates evenly distributed along the circumference of the ring plate.

[0014] The beneficial effects of adopting the technical solution of this utility model are:

[0015] 1. The inner, middle, and outer layers of this utility model are connected by hot-pressing and other methods, which enables this high-performance rubber sealing ring to maintain good sealing performance when facing different pressure, temperature and media environments. Together, they ensure that the sealing ring can effectively prevent the leakage of liquids and gases, and maintain a stable sealing effect even under harsh working conditions such as high pressure and high temperature.

[0016] 2. The middle layer of this utility model is made of rubber composite material, which improves the strength and tear resistance of the material; the outer layer is made of highly wear-resistant polyurethane rubber, which effectively reduces friction and wear between the outer layer and the sealing groove wall; the hard plastic material of the inner layer provides stable support and reduces excessive deformation caused by excessive pressure.

[0017] 3. The present invention has annular grooves on the upper and lower sides of the protruding inner and outer layers of the middle layer, which can deform under pressure and fit into contact with the contact surface to achieve a good sealing effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic cross-sectional view of the present invention. Figure 1 ;

[0022] Figure 4 This is a schematic cross-sectional view of the present invention. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0024] Figure 6 This is a schematic diagram of the sealing ring in this utility model;

[0025] Figure 7 This is a schematic diagram of the connecting frame structure in this utility model;

[0026] The markings in the diagram are: 1. Outer layer; 2. Inner layer; 3. Middle layer; 4. Reinforcing rib; 5. Annular groove; 6. Inner sealing ring; 7. Outer sealing ring; 8. Connecting frame; 81. Outer ring plate; 82. Inner ring plate; 83. Connecting plate; 9. Annular groove. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. Unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0028] Example 1:

[0029] like Figure 1 , Figure 2As shown, to improve the performance of the sealing ring, this embodiment provides a new high-performance sealing ring. This sealing ring includes an inner layer 2, a middle layer 3, and an outer layer 1, distributed sequentially from the inside to the outside. Special bonding processes and connection structures are employed between the inner layer 2 and the middle layer 3, and between the middle layer 3 and the outer layer 1. A layer of adhesive (such as epoxy adhesive, neoprene rubber adhesive, phenolic-nitrile adhesive, etc.) is pre-coated onto the contact surfaces of each layer, and a hot-pressing process is used to form a strong bond between the layers. Simultaneously, at the connection between the inner layer 2 and the middle layer 3, the crests of the wavy inner surface of the middle layer 3 are embedded in the annular grooves of the outer surface of the inner layer 2; at the connection between the middle layer 3 and the outer layer 1, the crests of the wavy outer surface of the middle layer 3 are embedded in the annular grooves of the inner surface of the outer layer 1. This interlocking structure further enhances the connection strength between the layers, ensuring that the layers will not separate under complex operating conditions and guaranteeing the overall performance of the sealing ring. The aforementioned connection method ensures that this high-performance rubber sealing ring maintains excellent sealing performance under different pressure, temperature, and media environments. The tight fit between the inner layer 2, the middle layer 3, and the outer layer 1 effectively prevents liquid and gas leakage, maintaining a stable sealing effect even under harsh conditions such as high pressure and high temperature.

[0030] The thickness of the intermediate layer 3 accounts for 50%-70% of the total thickness of the sealing ring; the thickness of the outer layer 1 accounts for 15%-25% of the total thickness of the sealing ring; and the thickness of the inner layer 2 accounts for 15%-25% of the total thickness of the sealing ring. In actual production, the thickness of the intermediate layer 3 can account for 50% of the total thickness of the sealing ring, the thickness of the outer layer 1 can account for 25% of the total thickness of the sealing ring, and the thickness of the inner layer 2 can account for 25% of the total thickness of the sealing ring. Alternatively, the thickness of the intermediate layer 3 can account for 65% of the total thickness of the sealing ring, the thickness of the outer layer 1 can account for 17.5% of the total thickness of the sealing ring, and the thickness of the inner layer 2 can account for 17.5% of the total thickness of the sealing ring. Still another possibility is that the thickness of the intermediate layer 3 can account for 70% of the total thickness of the sealing ring, the thickness of the outer layer 1 can account for 15% of the total thickness of the sealing ring, and the thickness of the inner layer 2 can account for 15% of the total thickness of the sealing ring.

[0031] To enhance oil resistance, heat resistance, mechanical properties, strength, abrasion resistance, and tear resistance, the intermediate layer 3 is made of a rubber composite material, including hydrogenated nitrile butadiene rubber (HNBR) and silica. A silica-reinforced HNBR compound was prepared by mechanical blending, and then vulcanized at 170°C for 5 minutes using a flat vulcanizing apparatus to obtain a silica-reinforced HNBR vulcanizate. The mass ratio of reinforcing agent to HNBR was 30:100. The HNBR imparts excellent oil resistance, heat resistance, and mechanical properties to the elastic layer, while the silica (SiO2) significantly improves the strength, abrasion resistance, and tear resistance of the elastic layer.

[0032] In order to support the entire sealing ring, the inner layer 2 is made of rigid plastic material, such as polyoxymethylene or modified polyphenylene ether, to prevent the sealing ring from deforming excessively under high pressure.

[0033] The outer layer 1 is made of wear-resistant rubber material, which is polyurethane rubber (PU). PU rubber has an extremely low coefficient of friction and excellent wear resistance, which can effectively reduce the friction and wear between the sealing ring and the sealing groove wall during use and extend the service life of the sealing ring.

[0034] like Figure 2 , Figure 3 , Figure 4 As shown, in order to achieve a better seal through the deformation of the intermediate layer 3, the height of the intermediate layer 3 is greater than the height of the inner layer 2 and the outer layer 1, and both ends of the intermediate layer 3 protrude from the inner layer 2 and the outer layer 1. Annular grooves 5 are provided on the upper and lower sides of the intermediate layer 3. Therefore, when the sealing ring is compressed, the upper and lower sides of the intermediate layer 3 deform and fit tightly with the contact surface, enhancing the sealing effect and providing a certain buffering effect to reduce damage to the sealing ring caused by vibration and other factors.

[0035] like Figure 3 As shown, in order to enhance the ability of the intermediate layer 3 to resist external forces, the width of one end of the opening of the annular groove 5 is smaller than the width of the other end, and a reinforcing rib 4 is provided at the wider end of the inner side of the annular groove 5, which can improve the strength of the intermediate layer 3 under the action of the reinforcing rib.

[0036] Example 2:

[0037] like Figure 5 As shown, based on Embodiment 1, when the size of the sealing ring provided in the above embodiment is smaller than the size of the sealing surface, sealing rings of different diameters can be set at the sealing surface at the same time, thereby achieving effective sealing with the cooperation of the inner sealing ring 6 and the outer sealing ring 7, while reducing the cost of the sealing device.

[0038] like Figure 6 , Figure 7 As shown, to ensure a relatively stable distribution of the inner sealing ring 6 and the outer sealing ring 7, a connecting frame 8 can be provided between them. The height of the connecting frame 8 is less than half the height of the sealing rings, and includes an inner ring plate 82 and an outer ring plate 81 distributed internally and externally. Multiple connecting plates 83 are fixedly arranged between the inner ring plate 82 and the outer ring plate 81, and the multiple connecting plates 83 are evenly distributed along the circumference of the ring plates. In addition, annular grooves 9 are provided on the adjacent sidewalls of the inner sealing ring 6 and the outer sealing ring, and the inner ring plate 82 and the outer ring plate 81 extend into their respective annular grooves 9, thereby restricting the relative position of the inner sealing ring 6 and the outer sealing ring 7 under the action of the connecting frame 8.

[0039] The above embodiments based on this utility model are provided for guidance. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. Any modifications, equivalent substitutions, improvements, etc., within the spirit and principles of this invention should be included within the protection scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-performance rubber sealing ring, characterized in that: It includes an inner layer (2), a middle layer (3) and an outer layer (1) distributed from the inside to the outside. The height of the middle layer (3) is greater than the height of the inner layer (2) and the outer layer (1), and both ends of the middle layer (3) protrude from the inner layer (2) and the outer layer (1). The wave crest of the wavy inner surface of the middle layer (3) is embedded in the annular groove on the outer surface of the inner layer (2), and the wave crest of the wavy outer surface of the middle layer (3) is embedded in the annular groove on the inner surface of the outer layer (1).

2. The high-performance rubber sealing ring according to claim 1, characterized in that: The thickness of the intermediate layer (3) accounts for 50%-70% of the total thickness of the sealing ring; the thickness of the outer layer (1) accounts for 15%-25% of the total thickness of the sealing ring; and the thickness of the inner layer (2) accounts for 15%-25% of the total thickness of the sealing ring.

3. The high-performance rubber sealing ring according to claim 1, characterized in that: The inner layer (2) and the middle layer (3), and the middle layer (3) and the outer layer (1) are connected by applying adhesive and using a hot pressing process.

4. The high-performance rubber sealing ring according to claim 1, characterized in that: The inner layer (2) is made of a hard material, the outer layer (1) is made of a wear-resistant material, and the middle layer (3) is made of a composite material; the hard material is polyoxymethylene or modified polyphenylene ether, the wear-resistant material is polyurethane rubber, and the composite material includes hydrogenated nitrile rubber and silicon dioxide.

5. The high-performance rubber sealing ring according to claim 1, characterized in that: The upper and lower sides of the intermediate layer (3) are provided with annular grooves (5). The width of one end of the opening of the annular groove (5) is smaller than the width of the other end, and a reinforcing rib (4) is provided at the wider end of the inner side of the annular groove (5).

6. The high-performance rubber sealing ring according to claim 1, characterized in that: The sealing ring has an annular groove (9) on its arc-shaped sidewall, and a connecting frame (8) can be provided between the inner sealing ring (6) and the outer sealing ring (7) which are distributed inside and outside. The edge of the connecting frame (8) extends into the annular groove (9) of the inner sealing ring (6) and the outer sealing ring (7).

7. A high-performance rubber sealing ring according to claim 6, characterized in that: The connecting frame (8) includes an inner ring plate (82) and an outer ring plate (81) distributed inside and outside. Multiple connecting plates (83) are fixedly arranged between the inner ring plate (82) and the outer ring plate (81), and the multiple connecting plates (83) are evenly distributed along the circumference of the ring plate.

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