O-shaped and lip-shaped combined seal and slotted structural body

Abstract

The utility model belongs to the technical field of sliding sealing, and particularly relates to an O-shaped and lip-shaped combined sealing and slotting structural body which comprises a sliding structural body, a lip-shaped sealing ring, an O-shaped inner sealing ring and an O-shaped outer sealing ring. The combined groove comprises a fixed limiting ring groove and a sliding limiting ring groove which are distributed up and down, the lip-shaped sealing ring comprises a fixed annular part and two lip parts, the inner wall of the fixed limiting ring groove is sleeved with the fixed annular part in the radial direction, and the lip parts are located in the sliding limiting ring groove; by means of the combination mode, the O-shaped sealing ring and the lip-shaped sealing ring complement each other in advantages, low friction resistance and high-pressure compression capacity are achieved, no lubricating oil is needed in the whole installation and use process, and therefore the sealing ring can be used as a component of equipment for providing clean compressed gas and can also be used as a clean hydraulic component, and the service life of the sealing ring is prolonged. The device is especially suitable for medium-high voltage application occasions.

Description

Technical Field

[0001] The utility model belongs to the technical field of sliding seals, and in particular relates to an O-shaped and lip-shaped seal combination seal and a grooved structure. Background Art

[0002] With rising living standards, the demand for clean compressed air is growing, primarily in the food and medical sectors. Clean air sources typically rely on cup seals, such as in medical air compressors. These seals offer advantages such as low friction, low cost, and adequate suction performance. However, they are less durable than other seals and require complex assembly and disassembly. On the other hand, lip seals (including U-, Y-, and V-shaped seals) or O-ring seals, commonly used in hydraulic and pneumatic cylinders, utilize lubricants to enhance sealing and reduce friction, but fail to meet hygiene requirements while maintaining performance. These seals have a strong industrial foundation, are more cost-effective, and offer a wider selection of standard parts. Furthermore, in the area of combined seals, the established bud seal is a one-way, solid seal composed of a Y-shaped fabric-strap rubber ring and a lip inner rubber ring, pressed and bonded together. These seals are primarily used to seal the reciprocating motion of hydraulic cylinder piston rods. However, due to their material properties, these seals have not been widely used in clean applications. Finally, although the intermediate process is not clean, cleanliness requirements can be met by installing a filter (such as using a high-pressure pump with a filter to inflate a diving cylinder) or applying food-grade lubricants. However, filters are consumables, and the lubricants need to be replenished or replaced, increasing implementation costs. In addition, there are also methods that use diaphragm pumps to achieve clean air supply, but this method is significantly different from the method of using a piston to drive the compressed gas in a reciprocating manner, and there are problems such as a low upper limit on the lifting pressure and vibration. Clean gas or water is obtained by sliding a slotted piston and applying pressure. As mentioned above, using food-grade lubricants to reduce friction or using industrial lubricants for lubrication while adding filters can also better meet existing needs. Therefore, no further technical updates have been seen. The utility model proposes a new solution that achieves low friction resistance in the compression process through structural coordination, a simple structure, and excellent compression effect. At the same time, the simple structure has a good industrial foundation. Summary of the Invention

[0003] The utility model provides an O-shaped and lip-shaped combined seal and slotted structure, which has the characteristics of low friction resistance and high-pressure compression capability, does not require any lubricating oil, and is suitable for medium and high-pressure applications.

[0004] The utility model provides the following technical solutions: including a sliding structure, a lip-shaped sealing ring, an "O-shaped" inner sealing ring, and an "O-shaped" outer sealing ring;

[0005] The circumferential side of the sliding structure is provided with a combination groove, and the combination groove includes a fixed limiting ring groove and a sliding limiting ring groove distributed up and down;

[0006] The lip seal ring includes a fixed annular part and two lip parts. The fixed annular part is radially sleeved on the inner wall of the fixed limit ring groove, and the lip parts are located inside the sliding limit ring groove.

[0007] The "O"-shaped inner seal ring and the "O"-shaped outer seal ring are concentrically distributed on the bottom surface of the inner wall of the sliding limit ring groove, and the "O"-shaped inner seal ring and the "O"-shaped outer seal ring are respectively in contact with the two lip seal rings.

[0008] Wherein, the "O"-shaped inner seal ring and the "O"-shaped outer seal ring are elastic seal rings. The inner diameter of the "O"-shaped inner seal ring is equal to the inner diameter of the lip part, and the outer diameter of the lip part is equal to the outer diameter of the "O"-shaped outer seal ring.

[0009] Wherein, the depth of the fixed limit ring groove is less than the depth of the sliding limit ring groove.

[0010] Wherein, the "O"-shaped inner seal ring is replaced with a stepped groove.

[0011] The beneficial effects of the present utility model are as follows: Through a combined manner, the advantages of the O-shaped seal ring and the lip seal ring are complementary to each other, realizing the capabilities of low friction resistance and high-pressure compression. During the entire installation and use process, no lubricating oil is required. Therefore, it can be used as a component of equipment that provides clean compressed gas. At the same time, it can also be used for clean hydraulic components, such as some extraction devices that require pressurization, and is particularly suitable for medium and high-pressure application scenarios.

[0012] Parts not involved in this device are the same as or can be implemented using existing technologies. Brief Description of the Drawings

[0013] Figure 1 is a cross-sectional schematic diagram of the present utility model;

[0014] Figure 2 is a schematic diagram of the first use state of the present utility model;

[0015] Figure 3 is a three-dimensional schematic diagram after removing the "O"-shaped inner seal ring in the present utility model;

[0016] In the figure: 1. Sliding structure; 11. Combined groove; 111. Fixed limit ring groove; 112. Sliding limit ring groove; 2. Lip seal ring; 21. Fixed annular part; 22. Lip part; 3. "O"-shaped inner seal ring; 4. "O"-shaped outer seal ring. Detailed Embodiments

[0017] Please refer to Figures 1 - 3, the present utility model provides the following technical solutions: It includes a sliding structure body 1, a lip seal ring 2, an "O-shaped" inner seal ring 3, and an "O-shaped" outer seal ring 4. A combined groove 11 is provided on the circumferential side of the sliding structure body 1. The combined groove 11 includes a fixed limit ring groove 111 and a sliding limit ring groove 112 which are distributed up and down. The lip seal ring 2 includes a fixed annular portion 21 and two lip portions 22. The fixed annular portion 21 is radially sleeved on the inner wall of the fixed limit ring groove 111, and the lip portions 22 are located inside the sliding limit ring groove 112. The "O-shaped" inner seal ring 3 and the "O-shaped" outer seal ring 4 are concentrically distributed on the bottom surface of the inner wall of the sliding limit ring groove 112, and the "O-shaped" inner seal ring 3 and the "O-shaped" outer seal ring 4 are respectively in contact with the two lip seal rings 2. The "O-shaped" inner seal ring 3 and the "O-shaped" outer seal ring 4 are elastic seal rings. The inner diameter of the "O-shaped" inner seal ring 3 is equal to the inner diameter of the lip portion 22, and the outer diameter of the lip portion 22 is equal to the outer diameter of the "O-shaped" outer seal ring 4. The depth of the fixed limit ring groove 111 is less than the depth of the sliding limit ring groove 112.

[0018] Among them, the "O-shaped" inner seal ring 3 is replaced by a stepped groove 3a. At this time, the use of one seal ring can be reduced, and the use requirements can be met at the same time.

[0019] In this implementation scheme: Through the combination of the lip seal ring 2, the "O-shaped" inner seal ring 3, and the "O-shaped" outer seal ring 4, the advantages of the "O-shaped" inner seal ring 3, the "O-shaped" outer seal ring 4, and the lip seal ring 2 are complementary to each other, realizing the ability of low frictional resistance and high-pressure compression. During the downward pressing process, the fixed limit ring groove 111 cooperates with the fixed annular portion 21 to fix the lip seal ring 2. The "O-shaped" inner seal ring 3 and the "O-shaped" outer seal ring 4 will drive the lip portion 22 to quickly close in the sliding limit ring groove 112, jointly realizing the seal during the compression process. The frictional resistance between the seal and the cylinder body is small, and the reliability of the two seals is higher. In the non-moving state, the outer diameter of the outer lip of the lip portion 22 is slightly smaller than the inner diameter of the compression cylinder, which is quite different from its original use and cooperation relationship in the sealing field. In pneumatic and hydraulic cylinders, such seals are tightly installed, so lubricating oil is required during the installation process, and certain installation skills are needed. However, the lifting movement process of the present utility model is very similar to the cup seal, and a part of the gas can be inhaled. During the entire installation and use process, no lubricating oil is required, so it can be used as a component of a device that provides clean compressed gas. At the same time, it can also be used for clean hydraulic components, such as some extraction devices that require pressurization, especially suitable for medium and high-pressure application scenarios. Since the lip portion 22 has a displacement space, the depth of the fixed limit ring groove 111 is less than the depth of the sliding limit ring groove 112.

Claims

1. An O-ring and lip seal combined seal and grooved structure, characterized in that: It includes a sliding structure (1), a lip seal (2), an "O"-ring inner seal (3), and an "O"-ring outer seal (4); A combined groove (11) is provided on the circumferential side of the sliding structure (1), and the combined groove (11) includes a fixed limiting ring groove (111) and a sliding limiting ring groove (112) distributed vertically; The lip seal (2) includes a fixed annular part (21) and two lip parts (22). The fixed annular part (21) is radially sleeved on the inner wall of the fixed limiting ring groove (111), and the lip parts (22) are located inside the sliding limiting ring groove (112); The "O"-ring inner seal (3) and the "O"-ring outer seal (4) are concentrically distributed on the bottom surface of the inner wall of the sliding limiting ring groove (112), and the "O"-ring inner seal (3) and the "O"-ring outer seal (4) are respectively in contact with the two lip seals (2).

2. The O-ring and lip seal combined seal and grooved structure according to claim 1, characterized in that: The "O"-ring inner seal (3) and the "O"-ring outer seal (4) are elastic seals. The inner diameter of the "O"-ring inner seal (3) is equal to the inner diameter of the lip part (22), and the outer diameter of the lip part (22) is equal to the outer diameter of the "O"-ring outer seal (4).

3. The O-shaped and lip-shaped combined seal and grooved structure according to claim 1, characterized in that: The depth of the fixed limiting ring groove (111) is less than the depth of the sliding limiting ring groove (112).

4. An O-ring and lip seal combination seal and grooved structure according to claim 1, characterized in that: Replace the "O"-ring inner seal (3) with a stepped groove (3a).

5. An O-ring and lip seal combined seal and grooved structure according to claim 1 or 2 or 4, characterized in that: Add other intermediate structures for limiting between the "O"-ring inner seal (3) and the "O"-ring outer seal (4) or the stepped groove (3a).

6. The O-ring and lip seal combined seal and grooved structure according to claim 1 or 3 or 4, characterized in that: The grooved structure has an axial opening.

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