Multi-mechanism sealing structure of combined body of special-shaped sealing ring and O-shaped sealing ring

Abstract

The utility model discloses a multi-sealing structure of a combined body of a special-shaped sealing ring and an O-shaped sealing ring. The multi-sealing structure comprises an inner wall, a sealing ring fixing device, an outer wall, a special-shaped rubber sealing ring and the O-shaped sealing ring. The inner wall is provided with a sealing ring fixing device, the sealing ring fixing device and the inner wall form a groove design, and the sealing ring fixing device is used for fixing the special-shaped sealing ring, preventing the sealing ring from moving or rolling during working, forming effective sealing during extrusion sealing and preventing fluid leakage. The section of the special-shaped sealing ring is semi-elliptical, and the special-shaped sealing ring is provided with an upper groove and a lower groove for accommodating the O-shaped rubber ring. The O-shaped rubber ring is made of a hard rubber material, impurities can be prevented from entering a sealing interface, the special-shaped sealing ring is promoted to deform under extrusion, and therefore the sealing force is enhanced. In addition, the oval hole is formed in the special-shaped sealing ring, in the sealing process, under the action of fluid pressure or friction force, the hole can transversely deform, the deformation allowance of the structure is increased, and the leakage process is delayed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the engineering sealing technology design field, concretely relates to a multi-mechanism sealing structure of the combined body of the special-shaped sealing ring and O-shaped sealing ring, can enhance the self-sealing capacity of the sealing ring and realize the protection to the sealing interface through the cooperation between different structures. BACKGROUND

[0002] In recent years, with the development of automation industry, many devices need to use hydraulic devices, fluid conveying devices and the like, so that fluid leakage problems are prone to occur in the conveying process, which will seriously affect the production safety of the device, the personal safety of the operating personnel and the environmental safety and the like. The sealing structure is prone to leakage under fluid pressure, especially when the pressure is large enough, an instantaneous high-speed jet flow can be generated at the interface, which produces a huge impact force on the surrounding personnel and equipment, causing irreparable losses.

[0003] Currently, common sealing rings are mostly single O-, U-, or Y-rings. These seals form a tight seal at the contact interface, preventing fluid leakage. While a single seal ring design can meet common sealing requirements, it cannot predict leaks and lacks multiple leak prevention measures. Effective structural design and composite assembly of the seal ring can enhance sealing strength and provide multiple sealing protection measures. Especially for soft materials like rubber, which can deform significantly under sealing, single O-, U-, or Y-rings without structural support and protection present several disadvantages. For example, O-rings exhibit high friction at low pressures, resulting in reduced friction margin, which directly affects sealing performance and results in poor sealing performance. They are also prone to rolling and twisting, leading to breakage and leakage. They are typically used for sealing small sliding valves and pistons and piston rods where minimal leakage is tolerated. Y-rings have large sealing end faces, requiring split mounting grooves, which are complex to machine. They also function in one direction. To seal bidirectional fluids, a pair of seals is required, resulting in a complex and bulky sealing structure. Trapped fluid may form between the two sealing rings, causing damage due to reverse pressure. The friction of the U-shaped sealing ring is large at low pressure, and the friction margin is reduced, which directly affects the sealing performance. The sealing performance is poor, and it is easy to roll over and twist, causing damage. It is cost-effective when used for low-pressure and low-speed reciprocating motion at room temperature, but it is not ideal for use under high temperature, high speed or high pressure conditions. It is suitable for small-sized sliding valves and piston and piston rod seals that allow a small amount of leakage. Therefore, many special-shaped seals are designed for different usage environments and exhibit different sealing performance. Chinese patent, patent number: CN221568770U discloses a compressor piston sealing structure that can act as a buffer to increase sealing performance, reduce friction and vibration, and increase service life. Chinese patent, patent number: CN221524615U discloses a curtain wall hanging window and column sealing structure with a slot-type edge guard to improve the safety and reliability of the bonding between the insulating glass and the window frame, and the sealing performance between the glass and the curtain wall column, and facilitate installation and disassembly. A Chinese patent, CN221469802U, discloses a dishwasher cavity sealing structure that resists collapse and deformation at high temperatures, is easy to install, and resists falling off. While these patents enhance the reliability of the seal in their respective operating environments, the structures still lack adequate protection against leaks, failing to prevent impurities from damaging the sealing interface and making them susceptible to instantaneous leaks. Utility Model Content

[0004] The purpose of the utility model is to provide a safe, stable and sealing structure design with strong sealing ability. It relies on the deformation cooperation between different components to enhance the self-sealing performance of the interface under the action of fluid pressure, and has a certain isolation effect on impurities in the sealing medium, overcoming the low safety deficiency of the single sealing method of the traditional sealing structure, and has the advantages of stability, safety and strong self-sealing ability.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A multi-mechanism sealing structure of a combined special-shaped sealing ring and an O-ring, comprising an inner wall, an outer wall, a special-shaped sealing ring and an O-ring; a sealing ring fixing device is provided on the inner wall, forming a groove together with the inner wall for fixing the special-shaped sealing ring; the cross-section of the special-shaped sealing ring is semi-elliptical, and circular grooves are provided on the upper and lower sides for accommodating the O-ring; the cross-section of the special-shaped rubber sealing ring is provided with an elliptical groove; after the O-ring is installed, its height is slightly higher than the special-shaped sealing rings on both sides, forming a closer contact with the outer wall,

[0007] Furthermore, the overall structure is designed to be symmetrical in both directions, and can be sealed on both sides, or can be sealed in one direction.

[0008] Furthermore, the special-shaped sealing ring and the O-ring are elliptical in shape on the outside, with the center being the highest.

[0009] Furthermore, the sealing ring fixing device is designed to be recessed inwards, which restrains the deformation and movement of the sealing ring and helps form a tight sealing interface.

[0010] Furthermore, the material of the O-ring should be rubber with a relatively high hardness, and its size should be consistent with the circular groove.

[0011] Furthermore, circular grooves are provided on both sides of the special-shaped sealing ring to clamp the O-ring.

[0012] Furthermore, the special-shaped sealing ring is provided with an elliptical groove to allow deformation of the bottom, thereby enhancing the deformation adaptability of the overall structure.

[0013] The technical solution provided by this utility model has the following significant advantages:

[0014] (1) The utility model has a multi-mechanism sealing structure of a combined special-shaped sealing ring and an O-ring, which realizes efficient joint sealing through the cooperation of the special-shaped sealing ring and the O-ring. The O-ring effectively protects the sealing interface, preventing damage to the sealing interface by impurities or external impact, and ensuring stable sealing performance.

[0015] (2) Through the squeezing effect of the O-ring on the special-shaped sealing ring, the utility model enhances the self-sealing ability of the sealing interface and improves the reliability and durability of the seal.

[0016] (3) By adopting the elliptical groove design, the utility model significantly improves the deformation adaptability of the overall structure, so that it can effectively alleviate the leakage risk caused by pressure changes under different working conditions, delay the leakage process, and further improve the durability of the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0018] Figure 2 A three-dimensional diagram of the structure of this utility model;

[0019] 1. Inner wall; 2. Sealing ring fixture; 3. Outer wall; 4. Special-shaped sealing ring; 5. Oval groove; 6. O-ring DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0021] The utility model provides a multi-sealing structure of a special-shaped sealing ring and an O-ring combination, which is suitable for sealing equipment such as pipelines. The structure effectively enhances the sealing performance and can prevent impurities from damaging the sealing interface to a certain extent through the combination of multiple sealing elements.

[0022] like Figure 1 As shown, the sealing structure includes an inner wall 1, an outer wall 3, a special-shaped rubber sealing ring 4 and an O-ring 6. A sealing ring fixing device 2 is provided on the inner wall 1, and the fixing device and the inner wall 1 together form a groove for fixing the special-shaped sealing ring 4. This design can not only prevent the sealing ring from moving or rolling during operation, but also ensure that an effective seal can be formed in the groove when extrusion sealing occurs, thereby avoiding fluid leakage. The cross-section of the special-shaped sealing ring 4 is semi-elliptical, and circular grooves are provided on the upper and lower sides for placing the O-ring 6. The semi-elliptical cross-sectional shape ensures the sealing ability of the sealing structure at the top. If the O-ring 6 is made of a harder rubber material, it has a dual role in the sealing process: on the one hand, it can prevent impurities from entering the sealing interface of the special-shaped sealing ring, thereby avoiding damage to the sealing effect; on the other hand, as the O-ring 6 is squeezed, its deformation will cause the special-shaped sealing ring to deform toward the center, further enhancing the sealing ability of the sealing interface. As Figure 1 As shown, an elliptical hole 5 is provided on the cross section of the special-shaped sealing ring 4. During the sealing process, under the action of fluid pressure or friction, the hole will deform laterally, increasing the deformation margin of the structure, thereby delaying the occurrence of leakage.

[0023] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A multi-mechanism sealing structure of a special-shaped sealing ring and an O-shaped sealing ring combination, comprising an inner wall (1), an outer wall (3), a special-shaped sealing ring (4) and an O-shaped sealing ring (6); characterized in that: The inner wall (1) is provided with a sealing ring fixing device (2), which forms a groove with the inner wall (1) for fixing the special-shaped sealing ring (4); the cross section of the special-shaped sealing ring (4) is semi-elliptical, and circular grooves are provided on the upper and lower sides for accommodating the O-shaped sealing ring (6); the cross section of the special-shaped sealing ring (4) is provided with an elliptical groove (5); the O-shaped sealing ring (6) is higher than the special-shaped sealing rings (4) on both sides and is in close contact with the outer wall (3).

2. The multi-mechanism sealing structure of a special-shaped sealing ring and an O-ring combination according to claim 1, characterized in that: The overall structure is designed to be symmetrical up and down, sealing both the upper and lower sides, and can also be sealed in one direction.

3. The multi-mechanism sealing structure of a special-shaped sealing ring and an O-ring combination according to claim 1, characterized in that: The special-shaped sealing ring (4) and the O-shaped sealing ring (6) are elliptical in shape on the outside, with the center being the highest.

4. The multi-mechanism sealing structure of a special-shaped sealing ring and an O-ring combination according to claim 1, characterized in that: The sealing ring fixing device (2) is designed to be recessed inwards.

5. The multi-mechanism sealing structure of a special-shaped sealing ring and an O-ring combination according to claim 1, characterized in that: The material of the O-type sealing ring (6) is rubber, and its size is consistent with the circular groove.

6. The multi-mechanism sealing structure of a special-shaped sealing ring and an O-ring combination according to claim 1, characterized in that: The two sides of the special-shaped sealing ring (4) are provided with circular grooves, which can clamp the O-type sealing ring (6).

7. The multi-mechanism sealing structure of a special-shaped sealing ring and an O-ring combination according to claim 1, characterized in that: The special-shaped sealing ring (4) is provided with an elliptical groove (5) to allow deformation of the bottom, thereby enhancing the deformation adaptability of the overall structure.

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