Special-shaped sealing ring structure

Abstract

The application relates to a special-shaped sealing ring structure and relates to the technical field of sealing rings, which comprises a plurality of sectional base bodies, the sectional base bodies are spliced to form a complete sealing ring, the sectional base body is composed of a main body structure and a sealing lip structure, an installation groove is arranged on the outer wall of the sealing lip structure, the installation groove penetrates the sealing lip structure in the circumferential direction, and a tightening coil spring is arranged in the installation groove. The application solves the problems of poor sealing effect under the static working condition of the existing sealing ring and the problem of the fast wear speed of the sealing lip structure.

Description

Technical Field

[0001] This invention relates to the field of sealing ring technology, specifically to a non-standard sealing ring structure. Background Technology

[0002] As the core sealing element for sealing shaft components, the sealing ring generates a stable initial contact pressure in the contact area through the tight interference contact formed between its elastic material and the surface of the shaft component, thereby effectively blocking the leakage path of the medium and achieving a reliable sealing effect.

[0003] Existing sealing rings have gradually revealed their shortcomings during use, mainly in the following aspects: First, the sealing effect is poor under static conditions. Specifically, when the sealing system is running, the high pressure generated inside acts directly on the sealing lip structure of the sealing ring. This pressure forces the sealing lip to fit more tightly against the surface of the shaft, forming stronger contact stress. Therefore, the sealing effect is excellent under high-pressure dynamic conditions. However, it is precisely this tight fit formed under pressure that exacerbates the friction between the sealing lip and the shaft, leading to accelerated wear. When the system is under low-pressure or no-pressure static conditions, due to the loss of the auxiliary force of high pressure, the interference between the already worn sealing lip and the surface of the shaft decreases, and the initial contact pressure decreases accordingly. It is impossible to maintain an effective sealing gap, resulting in media leakage. Therefore, the existing sealing ring has a poor sealing effect under static conditions.

[0004] Secondly, the sealing lip structure wears out quickly. Specifically, during the operation of shaft components, there is often radial runout or axial movement, especially for large-diameter shaft components, where the runout amplitude is more obvious. When the shaft component runs out of space, it will exert intermittent or periodic severe pressure on the sealing lip structure of the sealing ring, causing the contact pressure in the local area of ​​the sealing lip to rise sharply in an instant, far exceeding the stress required for normal sealing. This impact will accelerate the wear of the sealing lip structure and seriously affect the service life of the sealing ring.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a non-circular sealing ring structure. The sealing lip structure of this sealing ring can generate a continuous and constant radial contraction force under static working conditions, forcing the sealing lip structure to fit tightly against the surface of the shaft. Even without system pressure assistance, it can form a uniform and reliable sealing band at the contact interface, significantly improving the sealing effect under static working conditions during shutdown or low pressure. The seal provides a controllable deformation space. When a shaft component experiences a vibration impact on the sealing lip structure, the sealing lip structure will bend and make way in the direction of this deformation space after being subjected to force, avoiding rigid impact and compression, greatly slowing down the wear rate of the sealing lip structure, and improving the service life of the seal.

[0007] To address the above problems, the present invention provides the following technical solution: A non-standard sealing ring structure includes several segmented bases. The segments are assembled to form a complete sealing ring. Each segmented base consists of a main structure and a sealing lip structure. The outer wall of the sealing lip structure is provided with an installation groove that extends circumferentially through the sealing lip structure. A tightening helical spring is fitted inside the installation groove.

[0008] As an optimized solution, the main structure has a flexible clearance groove along the circumferential direction at the end near the sealing lip structure.

[0009] As an optimized solution, the outer wall of the main structure is provided with a spring groove, which runs through the main structure circumferentially, and a fastening helical spring is sleeved inside the spring groove.

[0010] As an optimized solution, the inner diameter of the sealing lip structure is smaller than the inner diameter of the main structure.

[0011] As an optimized solution, both the main body structure and the sealing lip structure are made of self-lubricating material.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. When this sealing ring is in use, the sealing lip structure contacts the surface of the shaft. When the system is in a low-pressure or no-pressure static condition, the tightening helical spring generates a continuous and constant radial contraction force on the sealing lip structure, forcing the sealing lip structure to fit tightly against the surface of the shaft. Even without system pressure assistance, a uniform and reliable sealing band can be formed at the contact interface, which significantly improves the sealing effect in static conditions when the system is stopped or under low pressure. 2. The flexible relief groove provides a controllable deformation space for the sealing ring. When the shaft part jumps and impacts the sealing lip structure, the sealing lip structure will bend and make way in the direction of the flexible relief groove after being stressed, avoiding rigid impact and extrusion, greatly slowing down the wear rate of the sealing lip structure and improving the service life of the sealing ring. 3. The sealing ring is assembled from several segmented bases and is securely assembled by fastening helical springs. When replacing the segmented bases, it is easy to disassemble and quickly replace them by simply removing the fastening helical springs. This enables efficient replacement of the sealing ring without disassembling the shaft components, significantly improving the operability of sealing ring maintenance and replacement. 4. Both the main structure and the sealing lip structure are made of materials with self-lubricating properties, requiring little or no lubricant during operation, which significantly improves the applicability of the sealing ring. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the segmented matrix structure of the present invention; Figure 3 This is a cross-sectional view of the main structure and sealing lip structure of the present invention.

[0015] In the diagram: 1-segmented base; 2-fastening helical spring; 3-tightening helical spring; 4-spring groove; 5-main structure; 6-mounting groove; 7-sealing lip structure; 8-flexible clearance groove. Detailed Implementation

[0016] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0017] like Figures 1 to 3 As shown, a non-standard sealing ring structure includes several segmented bases 1. The segmented bases 1 are assembled to form a complete sealing ring. The segmented base 1 consists of a main structure 5 and a sealing lip structure 7. The outer wall of the sealing lip structure 7 is provided with an installation groove 6. The installation groove 6 penetrates the sealing lip structure 7 circumferentially. A tightening helical spring 3 is sleeved inside the installation groove 6.

[0018] A flexible clearance groove 8 is provided circumferentially at the end of the main structure 5 near the sealing lip structure 7.

[0019] The outer wall of the main structure 5 is provided with a spring groove 4, which runs through the main structure 5 circumferentially, and a fastening helical spring 2 is fitted inside the spring groove 4.

[0020] The inner diameter of the sealing lip structure 7 is smaller than the inner diameter of the main structure 5.

[0021] Both the main structure 5 and the sealing lip structure 7 are made of self-lubricating material.

[0022] The working principle of this device is as follows: When the sealing ring is in use, the sealing lip structure 7 contacts the surface of the shaft. When the system is in a low-pressure or no-pressure static condition, the tightening coil spring 3 generates a continuous and constant radial contraction force on the sealing lip structure 7, forcing the sealing lip structure 7 to fit tightly against the surface of the shaft. Even without system pressure assistance, a uniform and reliable sealing band can be formed at the contact interface, which significantly improves the sealing effect in static conditions when the system is stopped or under low pressure. The flexible relief groove 8 provides a controllable deformation space for the sealing ring. When the shaft part jumps and impacts the sealing lip structure 7, the sealing lip structure 7 will bend and make way in the direction of the flexible relief groove 8 after being subjected to force, avoiding rigid impact and extrusion, greatly slowing down the wear rate of the sealing lip structure 7, and improving the service life of the sealing ring. The sealing ring is assembled from several segmented bases 1 and is securely assembled by fastening helical springs 2. When replacing the segmented bases 1, it is easy to disassemble and quickly replace them by simply removing the fastening helical springs 2. This enables efficient replacement of the sealing ring without disassembling the shaft components, significantly improving the operability of sealing ring maintenance and replacement. Both the main structure 5 and the sealing lip structure 7 are made of materials with self-lubricating properties, requiring little or no lubricant during operation, which significantly improves the applicability of the sealing ring.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A non-circular sealing ring structure, characterized in that: It includes several segmented substrates (1), and the segmented substrates (1) are assembled to form a complete sealing ring. The segmented substrate (1) is composed of a main structure (5) and a sealing lip structure (7). The outer wall of the sealing lip structure (7) is provided with an installation groove (6). The installation groove (6) penetrates the sealing lip structure (7) circumferentially. A tightening helical spring (3) is sleeved inside the installation groove (6).

2. The irregular sealing ring structure according to claim 1, characterized in that: The main structure (5) has a flexible relief groove (8) along the circumferential direction at the end near the sealing lip structure (7).

3. The irregular sealing ring structure according to claim 1, characterized in that: The outer wall of the main structure (5) is provided with a spring groove (4), which runs through the main structure (5) circumferentially, and a fastening helical spring (2) is sleeved inside the spring groove (4).

4. The irregular sealing ring structure according to claim 1, characterized in that: The inner diameter of the sealing lip structure (7) is smaller than the inner diameter of the main structure (5).

5. The irregular sealing ring structure according to claim 1, characterized in that: Both the main structure (5) and the sealing lip structure (7) are made of self-lubricating material.

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