Composite anti-fatigue sealing gasket

Abstract

The utility model discloses a composite anti-fatigue sealing gasket, which belongs to the technical field of sealing gaskets and comprises a sealing gasket body, the sealing gasket body comprises an upper sealing layer and a lower sealing layer, a plurality of groups of diversion trenches are arranged on the outer wall of the upper sealing layer, and a plurality of groups of positioning bulges are connected to the inner ring of the lower sealing layer. According to the sealing gasket, the combination of the upper sealing layer and the lower sealing layer ensures the stable sealing effect of the sealing gasket under various working conditions, the polyurethane foam material of the middle buffering layer and the reinforcing ribs in the middle buffering layer can effectively absorb and disperse dynamic loads and vibration energy, and the sealing gasket has the advantages of being good in sealing effect and good in sealing effect. Stress concentration is reduced, the anti-fatigue performance of the sealing gasket is remarkably improved, the service life of the sealing gasket is prolonged, the flow guide grooves can guide fluid to flow, impact force of the fluid on the sealing gasket is reduced, and abrasion of the sealing gasket is reduced; the positioning protrusions ensure that the sealing gasket is accurately aligned with the sealing face, and the sealing gasket is prevented from being damaged due to improper installation.

Description

Technical Field

[0001] This utility model relates to the field of sealing gasket technology, and in particular to a composite anti-fatigue sealing gasket. Background Technology

[0002] In various types of mechanical equipment, gaskets play a crucial role in preventing fluid leakage and isolating external impurities. However, traditional gaskets are prone to fatigue damage during long-term use, especially under harsh conditions such as dynamic loads, frequent vibrations, or high temperatures and pressures. This leads to decreased sealing performance and fluid leakage. This not only affects the normal operation of the equipment but can also cause safety hazards and economic losses.

[0003] Although some anti-fatigue gaskets on the market have made certain improvements in materials or structures, they still have problems such as insufficient fatigue resistance and unstable sealing effect. Some gaskets use only a single material, which makes it difficult to meet the requirements of high strength and good elasticity at the same time. Some gaskets have unreasonable structural designs, which cannot effectively disperse stress, leading to local stress concentration and accelerating the fatigue damage of the gaskets. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a composite fatigue-resistant sealing gasket.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a composite anti-fatigue sealing gasket, comprising a sealing gasket body, the sealing gasket body comprising an upper sealing layer and a lower sealing layer, the outer wall of the upper sealing layer being provided with a plurality of flow guide grooves, the inner ring of the lower sealing layer being provided with a plurality of positioning protrusions, and a buffer layer being provided between the upper sealing layer and the lower sealing layer.

[0006] As a further description of the above technical solution:

[0007] The upper sealing layer is made of polytetrafluoroethylene (PTFE). PTFE has excellent chemical stability, low coefficient of friction, and good self-lubricating properties, which can effectively prevent fluid leakage, reduce friction between the gasket body and the sealing surface, and extend the service life of the gasket body.

[0008] As a further description of the above technical solution:

[0009] The lower sealing layer is made of nitrile rubber (NBR), which has good oil resistance and wear resistance, and can withstand certain pressure and temperature, providing basic sealing performance and mechanical strength for the sealing gasket body.

[0010] As a further description of the above technical solution:

[0011] The buffer layer is made of polyurethane foam, which has excellent elasticity and cushioning properties. It can effectively absorb and disperse dynamic loads and vibration energy, reduce stress concentration, and improve the fatigue resistance of the sealing gasket.

[0012] As a further description of the above technical solution:

[0013] The internal connection of the buffer layer is provided with multiple reinforcing ribs made of aramid fiber in a mesh-like distribution. The reinforcing ribs can enhance the structural strength of the intermediate buffer layer, prevent it from deforming during long-term pressure and vibration, and further improve the fatigue resistance of the sealing gasket body.

[0014] As a further description of the above technical solution:

[0015] The positioning protrusion is hemispherical in shape. It can play a positioning role during installation, ensuring accurate alignment between the sealing gasket body and the sealing surface, and improving the sealing effect.

[0016] As a further description of the above technical solution:

[0017] The upper sealing layer, the buffer layer, and the lower sealing layer are connected by an adhesive.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the polytetrafluoroethylene material of the upper sealing layer has good chemical stability and self-lubricating properties, and the nitrile rubber material of the lower sealing layer provides good oil resistance and wear resistance. The combination of the two ensures the stable sealing effect of the gasket under various working conditions. The polyurethane foam material of the middle buffer layer and the internal reinforcing ribs can effectively absorb and disperse dynamic loads and vibration energy, reduce stress concentration, significantly improve the fatigue resistance of the gasket, and extend its service life.

[0020] 2. In this utility model, the flow guide groove can guide the fluid flow, reduce the impact force of the fluid on the sealing gasket, and reduce the wear of the sealing gasket; the positioning protrusion ensures the accurate alignment of the sealing gasket with the sealing surface, avoiding damage to the sealing gasket due to improper installation. This composite anti-fatigue sealing gasket is suitable for a variety of harsh working conditions, such as high temperature, high pressure, dynamic load and frequent vibration, and can meet the needs of different mechanical equipment. Attached Figure Description

[0021] Figure 1 This is a first-view view of a composite anti-fatigue sealing gasket proposed in this utility model;

[0022] Figure 2 This is a second-view view of a composite anti-fatigue sealing gasket proposed in this utility model;

[0023] Figure 3 This is a magnified view from point A, the first perspective, of a composite anti-fatigue sealing gasket proposed in this utility model.

[0024] Figure 4 This is a magnified view at point B, the first perspective, of a composite anti-fatigue sealing gasket proposed in this utility model.

[0025] Legend:

[0026] 1. Sealing gasket body; 2. Upper sealing layer; 3. Guide groove; 4. Buffer layer; 5. Lower sealing layer; 6. Positioning protrusion. Detailed Implementation

[0027] 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.

[0028] Reference Figures 1-4 An embodiment of this utility model is provided: a composite anti-fatigue sealing gasket, including a sealing gasket body 1, the sealing gasket body 1 including an upper sealing layer 2 and a lower sealing layer 5, the outer wall of the upper sealing layer 2 is provided with a plurality of flow guide grooves 3, the inner ring of the lower sealing layer 5 is provided with a plurality of positioning protrusions 6, and a buffer layer 4 is provided between the upper sealing layer 2 and the lower sealing layer 5.

[0029] The upper sealing layer 2 is made of polytetrafluoroethylene (PTFE). PTFE has excellent chemical stability, a low coefficient of friction, and good self-lubricating properties, effectively preventing fluid leakage, reducing friction between the sealing gasket body 1 and the sealing surface, and extending the service life of the sealing gasket body 1. The lower sealing layer 5 is made of nitrile rubber (NBR). NBR has good oil resistance and wear resistance, and can withstand certain pressure and temperature, providing basic sealing performance and mechanical strength for the sealing gasket body 1. The buffer layer 4 is made of polyurethane foam. Polyurethane foam has excellent elasticity and cushioning properties, effectively preventing fluid leakage. The system absorbs and disperses dynamic loads and vibration energy, reduces stress concentration, and improves the fatigue resistance of the sealing gasket body 1. The internal connection of the buffer layer 4 is provided with multiple reinforcing ribs made of aramid fiber in a mesh-like distribution. The reinforcing ribs can enhance the structural strength of the intermediate buffer layer 4 and prevent it from deforming during long-term pressure and vibration. At the same time, it further improves the fatigue resistance of the sealing gasket body 1. The positioning protrusion 6 is hemispherical in shape. The positioning protrusion 6 can play a positioning role during installation to ensure accurate alignment between the sealing gasket body 1 and the sealing surface and improve the sealing effect. The upper sealing layer 2, the buffer layer 4 and the lower sealing layer 5 are connected by adhesive.

[0030] Working Principle: When the gasket is in operation, the upper sealing layer 2 first contacts the sealing surface. Since the upper sealing layer 2 is made of polytetrafluoroethylene (PTFE), which has excellent self-lubricating properties and chemical stability, it effectively reduces friction with the sealing surface, lowers wear, and thus extends the service life of the gasket. Simultaneously, several sets of guide grooves 3 on the outer wall of the upper sealing layer 2 guide the flow direction of the medium, preventing the formation of localized high pressure or eddies on the gasket surface, reducing scouring and erosion, and further improving the gasket's fatigue resistance. The lower sealing layer 5 is made of nitrile rubber, which has good oil resistance and elasticity. Several sets of hemispherical positioning protrusions 6 connected to the inner ring of the lower sealing layer 5 precisely match the positioning grooves on the sealing surface during installation, providing positioning and ensuring the accuracy and stability of the gasket installation, preventing seal failure due to installation deviations. At the same time, the elasticity of nitrile rubber allows the lower sealing layer 5 to tightly adhere to the sealing surface, forming a good sealing effect. The buffer layer 4, located between the upper sealing layer 2 and the lower sealing layer 5, is made of polyurethane foam and possesses excellent cushioning properties. When the gasket is subjected to external pressure or vibration, the buffer layer 4 absorbs and disperses this energy, reducing the direct impact of pressure or vibration on the upper sealing layer 2 and the lower sealing layer 5, and preventing fatigue damage to the gasket due to excessive pressure or vibration. Furthermore, multiple mesh-distributed aramid fiber reinforcing ribs within the buffer layer 4 further enhance its structural strength, enabling it to better withstand external forces and helping to maintain the overall shape stability of the gasket. The upper sealing layer 2, buffer layer 4, and lower sealing layer 5 are connected by an adhesive, ensuring a tight bond between the layers to form a unified whole that works together to provide a seal. During operation, the materials in each layer work synergistically, fully utilizing their respective advantages to ensure both the sealing performance and fatigue resistance of the gasket, enabling this composite fatigue-resistant gasket to operate stably and reliably under various complex working conditions.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite fatigue-resistant sealing gasket, comprising a sealing gasket body (1), characterized in that: The sealing gasket body (1) includes an upper sealing layer (2) and a lower sealing layer (5). The outer wall of the upper sealing layer (2) is provided with several sets of guide grooves (3). The inner ring of the lower sealing layer (5) is provided with several sets of positioning protrusions (6). A buffer layer (4) is provided between the upper sealing layer (2) and the lower sealing layer (5).

2. The composite fatigue-resistant sealing gasket according to claim 1, characterized in that: The upper sealing layer (2) is made of polytetrafluoroethylene (PTFE).

3. The composite fatigue-resistant sealing gasket according to claim 1, characterized in that: The material of the lower sealing layer (5) is nitrile rubber (NBR).

4. The composite fatigue-resistant sealing gasket according to claim 1, characterized in that: The buffer layer (4) is made of polyurethane foam.

5. The composite fatigue-resistant sealing gasket according to claim 1, characterized in that: The internal connection of the buffer layer (4) is provided with multiple reinforcing ribs made of aramid fiber in a mesh-like distribution.

6. The composite fatigue-resistant sealing gasket according to claim 1, characterized in that: The positioning protrusion (6) is hemispherical in shape.

7. The composite fatigue-resistant sealing gasket according to claim 1, characterized in that: The upper sealing layer (2), the buffer layer (4), and the lower sealing layer (5) are connected by an adhesive.

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