A pressure-resistant rotary joint dynamic seal device

Abstract

The utility model discloses a kind of dynamic sealing devices of pressure-resistant rotary joint, it is related to joint sealing technical field, including joint pipe one and joint pipe two, joint pipe one is connected between joint pipe two by sealing bearing, joint pipe two outside is provided with sealing shell, several connecting bolts are connected between sealing shell and joint pipe one, several connecting bolts are annular array arrangement, joint pipe two inner end and sealing shell inside are all provided with the ring seat corresponding to each other. The utility model is through the rolling contact design of dynamic wheel and sealing ring one, convert traditional sliding friction into rolling friction, greatly reduce sealing interface wear and tear and prolong service life, adopt static sealing ring three, transition sealing ring two and the triple protection framework of dynamic sealing ring one, form the three-dimensional sealing system from static interface to rotating component, through the function synergy of medium isolation, structure protection and dynamic compensation, significantly improve overall reliability.

Description

Technical Field

[0001] This utility model relates to the field of joint sealing technology, and in particular to a pressure-resistant rotary joint dynamic sealing device. Background Technology

[0002] A rotary joint is a mechanical device used to transfer fluids (such as liquids, gases, steam, etc.) between rotating and stationary parts. Its main function is to achieve continuous fluid transfer between rotating and stationary parts, while allowing the connected parts to rotate freely. Rotary joints are commonly used in industrial equipment, machinery, automation systems, robots, automobiles, and other fields. The selection and usage requirements of rotary joints are determined based on factors such as different working conditions, fluid properties, and rotation speed.

[0003] Traditional rotary joints suffer from rapid material wear due to continuous friction on the contact surfaces, especially under high pressure or high speed conditions, which can easily lead to seal failure. Fixed sealing structures lack dynamic compensation capabilities, and as wear intensifies, the sealing pressure gradually decreases, requiring frequent shutdowns to replace components, severely impacting the continuous operating efficiency of the equipment. Relying on a single sealing ring design cannot provide comprehensive protection, and when the corrosiveness of the medium or pressure fluctuations exceed the design range, the entire sealing system is easily punctured. Therefore, this invention proposes a pressure-resistant dynamic sealing device for rotary joints to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pressure-resistant rotary joint dynamic sealing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pressure-resistant rotary joint dynamic sealing device includes a joint tube one and a joint tube two, which are connected by a sealing bearing. A sealing shell is provided on the outside of the joint tube two. A plurality of connecting bolts are connected between the sealing shell and the joint tube one, and the plurality of connecting bolts are arranged in a ring array. Corresponding ring seats are provided at the inner end of the joint tube two and inside the sealing shell. A rotating ring is provided inside the ring seat. A sealing ring one is provided on the outer side between two rotating rings. A plurality of movable frames are evenly provided on the outside of the plurality of sealing rings one, and the plurality of movable frames are arranged in a ring array. A dynamic wheel corresponding to the sealing ring one is installed at the inner end of the movable frame.

[0007] Preferably, a sliding shaft is fixed to the outside of the movable frame, and several sliding grooves corresponding to the sliding shaft are opened inside the sealed housing.

[0008] Preferably, the slide shaft slides inside and outside the groove of the sealed housing, a compression spring is sleeved around the slide shaft, and a limiting block located in the groove is fixed at the outer end of the slide shaft.

[0009] Preferably, a sealing ring three is provided between the sealing shell, the second connector tube and the first connector tube, and a sealing ring two is provided between the sealing shell and the first connector tube.

[0010] Preferably, sealed bearings are provided between the front and rear ends of the second connector tube and the sealed outer shell.

[0011] Preferably, the front end of the second connector tube is fixed with a limiting ring corresponding to the sealing shell.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model replaces the traditional sliding friction with the rolling contact between the dynamic wheel and the sealing ring, fundamentally reducing the wear of the sealing interface. This design not only reduces rotational resistance, but also significantly extends the service life of the sealing components. It is especially suitable for high-frequency rotation or high-load conditions. The constant pressure compensation mechanism of the compression spring ensures that the sealing pressure is continuously stable, avoiding the risk of leakage caused by pressure fluctuations.

[0014] 2. This utility model adopts a triple protection structure of static sealing ring three, transition sealing ring two and dynamic sealing ring one, forming a three-dimensional protection network from static interface to rotating parts. The functions of media isolation, structural protection and dynamic compensation complement each other, and the overall sealing reliability is systematically improved. The dynamic wheel continuously contacts the sealing surface to maintain airtightness. This self-compensation mechanism eliminates the maintenance needs of traditional sealing parts that require periodic adjustment, and is particularly suitable for long-term stable operation in unattended or harsh environments. Attached Figure Description

[0015] Figure 1 This invention provides a structural schematic diagram of a pressure-resistant rotary joint dynamic sealing device. Figure 1 ;

[0016] Figure 2 This invention provides a structural schematic diagram of a pressure-resistant rotary joint dynamic sealing device. Figure 2 ;

[0017] Figure 3 This is a cross-sectional structural schematic diagram of a pressure-resistant rotary joint dynamic sealing device proposed in this utility model;

[0018] Figure 4 This is a side sectional view of a pressure-resistant rotary joint dynamic sealing device proposed in this utility model.

[0019] In the diagram: 1. Connector pipe one; 2. Connector pipe two; 3. Sealing shell; 4. Connecting bolt; 5. Limiting ring; 6. Ring seat; 7. Movable frame; 8. Sealing ring one; 9. Dynamic wheel; 10. Sliding shaft; 11. Compression spring; 12. Rotary ring; 13. Sliding groove; 14. Sealing ring two; 15. Sealing ring three; 16. Sealed bearing. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 A pressure-resistant rotary joint dynamic sealing device includes a joint tube 1 and a joint tube 2. The joint tube 1 and the joint tube 2 are connected by a sealing bearing 16. A sealing shell 3 is provided on the outside of the joint tube 2. A plurality of connecting bolts 4 are connected between the sealing shell 3 and the joint tube 1. The plurality of connecting bolts 4 are arranged in a ring array. The inner end of the joint tube 2 and the inside of the sealing shell 3 are provided with corresponding ring seats 6. A rotating ring 12 is provided inside the ring seat 6. A sealing ring 8 is provided on the outer side between the two rotating rings 12. The combination of the rotating ring 12 and the sealing ring 8 forms the main sealing interface. The dynamic wheel 9 rolls along the sealing ring 8 under the drive of the movable frame 7, which transforms the traditional sliding friction into rolling friction, significantly reducing wear. The compression spring 11 continuously applies radial pressure through the sliding shaft 10 to ensure that the dynamic wheel 9 and the sealing ring 8 maintain a constant contact force, while allowing axial fine adjustment to compensate for installation errors. The dual arrangement of the sealing bearing 16 supports the rotational movement of the joint tube 2 and isolates external contaminants from entering the sealing cavity.

[0022] A number of movable frames 7 are evenly arranged on the outside of several sealing rings 8, and the movable frames 7 are arranged in a ring array. The inner end of the movable frame 7 is equipped with a dynamic wheel 9 corresponding to the sealing ring 8. A sliding shaft 10 is fixed on the outside of the movable frame 7. A number of sliding grooves 13 corresponding to the sliding shaft 10 are opened inside the sealing shell 3. The sliding shaft 10 slides in and out of the sliding grooves 13 of the sealing shell 3. A compression spring 11 is sleeved on the periphery of the sliding shaft 10, and a limiting block located in the sliding groove 13 is fixed on the outer end of the sliding shaft 10. The sealing ring 3 15 forms the first barrier at the static interface to prevent the medium from leaking along the axial direction. The sealing ring 2 14 provides secondary protection in the area of ​​the connecting bolt 4 to prevent the bolt hole from becoming a weak point. The dynamic sealing system, as the third line of defense, is specifically designed to deal with the sealing challenges of rotating parts. This graded protection system achieves full-condition coverage by complementing the characteristics of different sealing materials (such as wear resistance / elasticity / temperature resistance).

[0023] A sealing ring 3 15 is provided between the sealing shell 3, the second connector tube 2 and the first connector tube 1. A sealing ring 2 14 is provided between the sealing shell 3 and the first connector tube 1. Sealing bearings 16 are provided between the front and rear ends of the second connector tube 2 and the sealing shell 3. A limiting ring 5 corresponding to the sealing shell 3 is fixed at the front end of the second connector tube 2. The sliding groove 13 of the annular array and the sliding shaft 10 constitute a floating support system. When the first connector tube 8 has a gap due to wear, the compression spring 11 pushes the movable frame 7 to move as a whole. The dynamic wheel 9 automatically fills the sealing surface. The cooperation between the limiting ring 5 and the sealing shell 3 forms an axial constraint to prevent the second connector tube 2 from moving and disrupting the sealing balance. This mechanical self-compensation design can maintain long-term sealing reliability without external intervention.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure-resistant rotary joint dynamic sealing device, comprising a joint tube one (1) and a joint tube two (2), characterized in that, The first connector tube (1) and the second connector tube (2) are connected by a sealed bearing (16). The second connector tube (2) is provided with a sealed outer shell (3). The sealed outer shell (3) and the first connector tube (1) are connected by a plurality of connecting bolts (4). The plurality of connecting bolts (4) are arranged in a ring array. The inner end of the second connector tube (2) and the inner part of the sealed outer shell (3) are provided with corresponding ring seats (6). The ring seats (6) are provided with rotating rings (12). The outer side of the two rotating rings (12) is provided with sealing rings (8). The outer side of the plurality of sealing rings (8) is provided with a plurality of movable frames (7). The plurality of movable frames (7) are arranged in a ring array. The inner end of the movable frame (7) is equipped with a dynamic wheel (9) corresponding to the sealing ring (8).

2. The pressure-resistant rotary joint dynamic sealing device according to claim 1, characterized in that, The movable frame (7) is fixed with a sliding shaft (10) on the outside, and the sealed outer shell (3) has several sliding grooves (13) corresponding to the sliding shaft (10) inside.

3. The pressure-resistant rotary joint dynamic sealing device according to claim 2, characterized in that, The sliding shaft (10) slides inside and outside the groove (13) of the sealed housing (3). A compression spring (11) is sleeved around the sliding shaft (10), and a limiting block located in the groove (13) is fixed at the outer end of the sliding shaft (10).

4. The pressure-resistant rotary joint dynamic sealing device according to claim 1, characterized in that, A sealing ring three (15) is provided between the sealing shell (3), the connector tube two (2) and the connector tube one (1), and a sealing ring two (14) is provided between the sealing shell (3) and the connector tube one (1).

5. The pressure-resistant rotary joint dynamic sealing device according to claim 1, characterized in that, Sealed bearings (16) are provided between the front and rear ends of the connector tube (2) and the sealed outer shell (3).

6. The pressure-resistant rotary joint dynamic sealing device according to claim 1, characterized in that, The front end of the connector tube 2 (2) is fixed with a limiting ring (5) corresponding to the sealing shell (3).

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