Rotatable sealing joint

Abstract

The utility model discloses a rotatable sealing joint which comprises a joint cylinder, a rotary sealing piece and a slip ring seal, the joint cylinder is rotatably sleeved on the inner sides of the rotary sealing piece and the slip ring seal, and one end of the joint cylinder is fixedly connected with a sealing end cover. The rotary sealing piece comprises a positioning flange, a pressing guide ring, a shaft sleeve flange and a shaft sleeve cover which are sequentially connected, a bearing connected to the surface of the connector cylinder in a sleeved mode is arranged on the inner side of the shaft sleeve cover, and the sliding ring is rotationally connected to the inner side of the pressing guide ring in a sleeved mode in a sealed mode. According to the utility model, by adopting a rotary sleeving structure, the joint cylinder can freely rotate on the inner sides of the rotary sealing piece and the slip ring seal, and meanwhile, one end of the joint cylinder is fixedly connected with the sealing end cover, so that an efficient rotary sealing effect is realized, and the joint is suitable for various rotary connection occasions.

Description

Technical Field

[0001] This utility model relates to the field of sealing joint technology, specifically a rotatable sealing joint. Background Technology

[0002] In existing technologies, traditional rotary sealing joints typically employ a fixed connection structure, where the rotating component is directly fixed to the sealing element. This results in a relatively simple overall structure and is commonly used in low-speed, low-pressure rotary connection applications. Traditional rotary sealing structures rely primarily on the initial contact pressure of the sealing element to achieve a sealing effect. However, the relative movement between the rotating component and the sealing element easily causes wear, leading to a gradual decrease in sealing performance over time. Furthermore, traditional rotary sealing joints typically use a single sealing ring or gasket design, lacking automatic adjustment capabilities and making it difficult to achieve stable sealing performance under high load, high speed, or high sealing requirements.

[0003] However, in practical applications, especially in high-precision rotary sealing joints, traditional technical solutions have revealed the following shortcomings:

[0004] Insufficient sealing performance: Traditional rotary sealing joints lack a rotating sleeve structure, making the sealing components prone to axial and radial sealing failures during long-term use. Furthermore, due to the lack of automatic adjustment, the seals struggle to maintain tight contact after wear, resulting in weakened sealing and impacting the overall performance of the equipment.

[0005] Poor structural stability: In traditional designs, the lack of springs or double sealing rings means the sealing effect relies entirely on the initial contact pressure of the seal, making dynamic adjustment impossible based on axial changes. This can easily lead to leakage due to wear or deformation of the sealing surface. Furthermore, the single sealing ring design lacks both axial and radial sealing effects, making it unsuitable for sealing requirements under high pressure or high speed conditions.

[0006] Therefore, there is an urgent need for an improved rotary sealing joint that can achieve axial sealing through an automatically adjusting spring structure and double sealing through multiple dynamic sealing rings, thereby enhancing the reliability and durability of the seal and meeting higher usage requirements. Utility Model Content

[0007] The present invention aims to solve the technical problems existing in the prior art or related technologies.

[0008] This utility model relates to a rotatable sealing joint, comprising a joint cylinder, a rotary seal, and a slip ring seal. The joint cylinder is rotatably fitted inside the rotary seal and the slip ring seal, and a sealing end cap is fixedly connected to one end of the joint cylinder. The rotary seal consists of a positioning flange, a pressure guide ring, a bushing flange, and a bushing cover connected in sequence, with a bearing fitted onto the surface of the joint cylinder on the inner side of the bushing cover. The slip ring seal is rotatably fitted inside the pressure guide ring, and gaskets that slide against both ends of the slip ring seal are fixedly installed on the inner sides of both the positioning flange and the bushing flange. The slip ring seal includes an axial guide ring and shaft sealing rings slidably installed on both sides of the axial guide ring, wherein the surface of the axial guide ring is provided with several springs that abut against the shaft sealing rings at both ends. With the above structure, the joint cylinder can rotate freely inside the rotary seal and the slip ring seal, and one end is fixedly connected to the sealing end cap, achieving a rotary sealing effect. It is suitable for various rotary connection applications, improving the reliability and application range of the equipment.

[0009] In a preferred embodiment, this invention can be further configured such that: a dynamic sealing ring is provided on the inner side of the bushing cover, located on both sides of the bearing; the dynamic sealing ring is a rubber component. By providing a rubber dynamic sealing ring on the inner side of the bushing cover, better elasticity and sealing performance can be provided, ensuring a reliable sealing effect during rotation and effectively extending the service life of the seal.

[0010] In a preferred embodiment, this invention can be further configured such that the gasket is a polytetrafluoroethylene (PTFE) ring structure, and the surface of the gasket is provided with a sealing ring that abuts against the surfaces of the positioning flange and the bushing flange. By using a gasket made of PTFE, this sealing structure has good wear resistance and self-lubricating properties, ensuring a stable seal between the gasket and the positioning flange and the bushing flange, and reducing frictional loss during rotation.

[0011] In a preferred embodiment, this utility model can be further configured such that the positioning flange, pressure guide ring, bushing flange, and bushing cover are arranged sequentially from the end of the joint cylinder to one end of the sealing end cover, and the surfaces of the bushing flange and the positioning flange are provided with threaded tie rods that abut against both ends of the pressure guide ring. By sequentially arranging the positioning flange, pressure guide ring, bushing flange, and bushing cover, and providing threaded tie rods on the surfaces of the bushing flange and the positioning flange, not only is the stability of the sealing structure improved, but assembly and fastening are also facilitated, effectively enhancing the overall reliability of the sealing joint.

[0012] In a preferred embodiment, this invention can be further configured such that the axial guide ring and the sealing ring are connected by a plurality of spring structures. The springs provide axial elasticity during the rotation of the slip ring seal, ensuring that the sealing ring and the gasket remain in close contact at all times, thereby improving the sealing effect. By providing a spring structure between the axial guide ring and the sealing ring, axial elastic compensation can be provided, ensuring that the sealing ring remains in close contact with the gasket during rotation, guaranteeing the stability of the sealing effect, and maintaining an effective seal even after the seal wears down.

[0013] In a preferred embodiment, this invention can be further configured such that both the positioning flange and the bushing flange of the rotary seal are provided with lubrication grooves filled with grease to reduce friction between the slip ring seal and the bearing, thereby improving the operational stability of the rotary seal joint. By providing lubrication grooves and filling them with grease on the inner sides of the positioning flange and the bushing flange, the friction between the slip ring seal and the bearing is significantly reduced, ensuring smooth operation during rotation, while also reducing wear and increasing the service life of the seal joint.

[0014] In a preferred embodiment, this utility model can be further configured such that the connector cylinder and the sealing end cap are fixed together by a snap-fit ​​connection structure, wherein the sealing end cap has several threaded holes on its outer periphery and is fitted with locking screws that abut against the outer periphery of the connector cylinder, facilitating quick assembly and disassembly. By adopting a snap-fit ​​connection design, the assembly and disassembly of the connector cylinder and the sealing end cap are made more convenient, and the fixing with locking screws not only enhances the reliability of the connection but also improves the convenience of maintenance and replacement, shortening equipment downtime.

[0015] In summary, this utility model achieves a highly efficient rotary sealing effect through a multi-layered sealing structure and elastic adjustment design, and also possesses good wear resistance and self-lubrication properties, making it suitable for various rotary sealing application scenarios.

[0016] The beneficial effects achieved by this utility model are as follows:

[0017] 1. In this utility model, by adopting a rotating sleeve structure, the joint cylinder can rotate freely inside the rotating seal and the slip ring seal, while one end is fixedly connected to the sealing end cap, thereby achieving a highly efficient rotating sealing effect, which is suitable for various rotating connection occasions.

[0018] 2. In this utility model, by setting an axial guide ring and two side sealing rings on the slip ring seal, and providing a spring on the surface of the axial guide ring, the sealing ring is always in close contact with the gasket ring, thus achieving an automatically adjustable axial sealing effect. In addition, multiple dynamic sealing rings are used to achieve dual axial and radial sealing, thereby improving the reliability and durability of the seal. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0020] Figure 2 This is an exploded structural diagram of one embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the joint cylinder, slip ring seal, and bushing cover structure according to one embodiment of the present utility model.

[0023] Figure label:

[0024] 100. Connector sleeve; 110. Sealing end cap; 200. Rotary seal; 210. Positioning flange; 220. Pressure guide ring; 230. Shaft sleeve flange; 240. Shaft sleeve cap; 211. Gasket; 241. Bearing; 300. Slip ring seal; 310. Shaft guide ring; 320. Shaft sealing ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0026] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0027] The following is in conjunction with the appendix Figures 1-4 This invention describes a rotatable sealing joint provided by some embodiments of the present invention. Example 1

[0028] This utility model provides a rotatable sealing joint, such as Figures 1 to 4 As shown, it includes a connector cylinder 100, a rotary seal 200, and a slip ring seal 300. The connector cylinder 100 is rotatably sleeved inside the rotary seal 200 and the slip ring seal 300, and a sealing end cap 110 is fixedly connected to one end of the connector cylinder 100. This structure ensures that the connector cylinder 100 maintains a stable connection when rotating.

[0029] The rotary seal 200 consists of a positioning flange 210, a pressure guide ring 220, a bushing flange 230, and a bushing cover 240 connected in sequence. The inner side of the bushing cover 240 is provided with a bearing 241 that fits onto the surface of the connector cylinder 100, providing stable support and preventing axial displacement during rotation. The slip ring seal 300 is rotatably fitted inside the pressure guide ring 220, and gaskets 211 that slide against both ends of the slip ring seal 300 are fixedly installed on the inner sides of both the positioning flange 210 and the bushing flange 230, thereby achieving stable axial and radial sealing during rotation.

[0030] To enhance the sealing effect, the slip ring seal 300 includes an axial guide ring 310 and shaft sealing rings 320 slidably mounted on both sides of the axial guide ring 310. The surface of the axial guide ring 310 is provided with several springs that abut against the shaft sealing rings 320 at both ends. The spring structure can automatically adjust the contact pressure between the shaft sealing rings 320 and the washer rings 211 during rotation, providing a stable axial sealing effect.

[0031] Further expansion: In this embodiment, a dynamic sealing ring made of rubber is provided on the inner side of the bushing cover 240, and the dynamic sealing ring is located on both sides of the bearing 241. The dynamic sealing ring made of rubber provides good elasticity and wear resistance, ensuring a good sealing effect during rotation, while also improving the service life of the sealing structure. This design is suitable for applications requiring long-term continuous rotation and high sealing performance. Example 2

[0032] In another embodiment, various optimized designs are provided to further improve the operational smoothness and durability of the sealing joint. The rotatable sealing joint in this embodiment also includes a joint cylinder 100, a rotary seal 200, and a slip ring seal 300, with the joint cylinder 100 rotatably sleeved inside the rotary seal 200 and the slip ring seal 300. The overall structure is consistent with Embodiment 1, but some structures have been optimized to adapt to different application requirements.

[0033] In this embodiment, the gasket 211 is a polytetrafluoroethylene (PTFE) ring structure, and its surface is provided with a sealing ring that abuts against the surfaces of the positioning flange 210 and the bushing flange 230. PTFE material has good wear resistance and self-lubricating properties, which can significantly reduce friction during rotation and improve the service life of the sealing structure.

[0034] In addition, lubrication grooves are added to the inner sides of the positioning flange 210 and the bushing flange 230, and filled with grease. The grease reduces friction between the slip ring seal 300 and the bearing 241, ensuring that the sealing joint maintains a stable operating condition even at high speeds. This design is suitable for sealing applications under high-speed rotation conditions, effectively reducing friction and wear, and extending the service life of the sealing joint.

[0035] Further expansion: To facilitate quick disassembly and replacement, in this embodiment, the connector sleeve 100 and the sealing end cap 110 are fixed by a snap-fit ​​connection. Specifically, the sealing end cap 110 has several threaded holes on its outer periphery, and locking screws are installed in the threaded holes, abutting against the outer periphery of the connector sleeve 100. This snap-fit ​​design allows users to quickly disassemble and reassemble without using complex tools during maintenance and replacement, significantly shortening maintenance time, and is particularly suitable for scenarios requiring frequent maintenance and replacement.

[0036] Through the above two embodiments, the rotatable sealing joint of this utility model achieves high flexibility and sealing performance in its structure. In Embodiment 1, the use of a spring and rubber dynamic sealing ring design enables the sealing joint to have an automatic adjustment function and a double sealing effect, suitable for applications with high sealing requirements. In Embodiment 2, by using a polytetrafluoroethylene ring and lubrication groove structure, the frictional loss of the sealing joint under high-speed rotation is reduced, extending its service life. At the same time, the snap-fit ​​design enables convenient assembly and disassembly.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotatable sealing joint, characterized in that, include: The device comprises a connector sleeve (100), a rotary seal (200), and a slip ring seal (300). The connector sleeve (100) is rotatably fitted inside the rotary seal (200) and the slip ring seal (300), and a sealing end cap (110) is fixedly connected to one end of the connector sleeve (100). The rotary seal (200) includes a positioning flange (210), a pressure guide ring (220), a bushing flange (230), and a bushing cover (240) connected in sequence. The inner side of the bushing cover (240) is fitted onto the connector sleeve (100). The bearing (241) on the surface, the slip ring seal (300) is rotatably sleeved on the inner side of the pressure guide ring (220), the inner sides of the positioning flange (210) and the bushing flange (230) are fixedly installed with gaskets (211) that slide against both ends of the slip ring seal (300), the slip ring seal (300) includes a shaft guide ring (310) and shaft sealing rings (320) that slide on both sides of the shaft guide ring (310), the surface of the shaft guide ring (310) is provided with a number of springs that abut against the shaft sealing rings (320) at both ends.

2. The rotatable sealing joint according to claim 1, characterized in that, The inner side of the bushing cover (240) is provided with dynamic sealing rings located on both sides of the bearing (241), and the dynamic sealing rings are made of rubber.

3. A rotatable sealing joint according to claim 1, characterized in that, The gasket (211) is a polytetrachloroethylene ring structure, and the surface of the gasket (211) is provided with a sealing ring that abuts against the surfaces of the positioning flange (210) and the bushing flange (230).

4. A rotatable sealing joint according to claim 1, characterized in that, The positioning flange (210), the pressure guide ring (220), the bushing flange (230) and the bushing flange (230) are arranged sequentially from the end of the joint cylinder (100) to one end of the sealing end cover (110), and the surfaces of the bushing flange (230) and the positioning flange (210) are provided with threaded tie rods that abut against the two ends of the pressure guide ring (220).

5. A rotatable sealing joint according to claim 1, characterized in that, The axial guide ring (310) and the shaft sealing ring (320) are connected by several spring structures. The springs provide axial elasticity when the slip ring seal (300) rotates, so as to ensure that the shaft sealing ring (320) and the gasket ring (211) always maintain close contact, thereby improving the sealing effect.

6. A rotatable sealing joint according to claim 1, characterized in that, The positioning flange (210) and the bushing flange (230) of the rotary seal (200) are both provided with lubrication grooves. The lubrication grooves are filled with grease to reduce the friction between the slip ring seal (300) and the bearing (241) and improve the smooth operation of the rotary seal joint.

7. A rotatable sealing joint according to claim 1, characterized in that, The connector tube (100) and the sealing end cap (110) are fixed together by a snap-fit ​​connection structure. The sealing end cap (110) has several threaded holes on its outer periphery and is fitted with a locking screw that abuts against the outer periphery of the connector tube (100) to facilitate quick assembly and disassembly.

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