Multi-stage magnetofluid sealing leakproof structure

Abstract

The utility model provides a multistage magnetofluid sealing leakproof structure, and relates to the technical field of magnetofluid sealing. The multistage magnetofluid assembly is arranged in the shaft sleeve, the multistage magnetofluid assembly comprises a movable shaft arranged in the shaft sleeve, when the multistage magnetofluid sealing anti-leakage structure works, the movable shaft rotates in the shaft sleeve, and in the multistage magnetofluid assembly, the magnet generates a magnetic field to apply acting force to magnetofluid in the movable shaft, so that the movable shaft rotates in the shaft sleeve. The magnetofluid forms a stable sealing barrier under the action of a magnetic field, the sealing assembly assists in enhancing the sealing effect, when the movable shaft rotates, if displacement is generated due to factors such as vibration, the fixing plate moves along with the movable shaft, at the moment, the limiting blocks slide in the limiting grooves, the telescopic springs play buffering and resetting roles, it is ensured that the limiting blocks are tightly attached, and the sealing effect is improved. And the first rubber pad further enhances the sealing performance and prevents the medium from leaking from the gap between the shaft sleeve and the moving shaft, so that the multi-stage and efficient sealing and leakage prevention functions are realized.

Description

Technical Field

[0001] This utility model relates to the field of magnetic fluid sealing technology, and in particular to a multi-stage magnetic fluid sealing leak-proof structure. Background Technology

[0002] Multi-stage magnetohydrodynamic (MHD) sealing leak-proof structure is a technology that utilizes the sealing effect formed by magnetohydrodynamics under the action of a magnetic field. It is widely used to prevent liquid or gas leakage. It enhances sealing performance and reduces friction loss and mechanical wear by setting up multiple MHD seals in cascade. It is suitable for sealing needs in high temperature, high pressure or corrosive environments and has strong reliability and durability.

[0003] However, in practical use, the following shortcomings still exist. For example, the existing multi-stage magnetohydrodynamic (MHD) seal leak-proof structure cannot achieve multi-stage and efficient sealing leak-proof function. In many industrial scenarios, such as pumps and compressors, MHD seals are used to prevent leakage of the working medium. If efficient sealing cannot be achieved, leakage of the working medium will cause the internal pressure and flow rate of the equipment to deviate from the design value, resulting in a significant decrease in the operating efficiency of the equipment. In some industries with high requirements for product quality, such as electronics, pharmaceuticals, and food, even a small amount of leakage may cause product contamination.

[0004] Therefore, this utility model proposes a multi-stage magnetohydrodynamic sealing and leak-proof structure to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-stage magnetohydrodynamic sealing and leak-proof structure.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a multi-stage magnetohydrodynamic sealing and leak-proof structure, comprising:

[0007] bushing;

[0008] A multi-stage magnetofluid assembly is disposed inside a bushing. The multi-stage magnetofluid assembly includes a moving shaft disposed inside the bushing, a magnetofluid disposed inside the moving shaft, a support plate fixed inside the bushing, a support ring fixed on the support plate, and a magnet fixed on the top of the support ring.

[0009] A sealing assembly is placed on a bushing. The sealing assembly includes a limiting groove formed on one side of the bushing. A telescopic spring is fixed in the limiting groove. A fixing plate is rotatably connected to the moving shaft near the limiting groove. A limiting block is fixed on the fixing plate near the limiting groove. A first rubber pad is fixed on the limiting block.

[0010] Furthermore, the moving shaft is disposed within the support ring.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the support ring provides radial support for the moving shaft, ensuring the stability of the moving shaft during rotation. The cooperation structure between the two limits the movement trajectory of the moving shaft, enabling the moving shaft to rotate smoothly around the predetermined axis, laying the foundation for the magnetic fluid sealing and overall leak-proof function.

[0012] Furthermore, the support ring is provided with ball bearings inside.

[0013] The beneficial effects of adopting the above-mentioned further solution are: the ball bearings are located between the support ring and the moving shaft, which converts sliding friction into rolling friction. When the moving shaft rotates, the ball bearings roll, which greatly reduces the friction between the moving shaft and the support ring, reduces energy loss, improves rotation efficiency, and extends the service life of the components.

[0014] Furthermore, a bearing is provided on one side of the moving shaft.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the bearing is installed on one side of the moving shaft, which further enhances the smoothness of the moving shaft rotation. It can withstand the axial and radial loads generated by the moving shaft during operation, reduce the vibration and displacement of the moving shaft, and ensure the stable operation of the magnetohydrodynamic sealing structure under complex working conditions.

[0016] Furthermore, the limiting block is disposed within the limiting groove.

[0017] The beneficial effects of adopting the above-mentioned further solution are: the limiting block moves within the limiting groove, and when the moving shaft is displaced due to factors such as vibration, the limiting block can limit the excessive offset of the fixed plate and the moving shaft, and work in conjunction with the telescopic spring to maintain the sealing performance of the sealing assembly and prevent leakage.

[0018] Furthermore, a second rubber pad is fixed on the side of the bushing away from the limiting groove.

[0019] The beneficial effects of adopting the above-mentioned further solution are: the second rubber pad is located at a specific position on the bushing, which can further fill the gap that may exist between the bushing and the external connecting parts. It uses the elasticity and sealing properties of rubber to prevent the medium from leaking from the edge of the bushing on that side, thereby enhancing the overall structure's leak-proof capability.

[0020] Furthermore, the fixing plate is threaded with bolts, which are threaded onto the bushing.

[0021] The beneficial effects of adopting the above-mentioned further solution are: the bolts securely connect the fixing plate and the bushing, and by adjusting the tightness of the bolts, the position of the fixing plate and the constraint force on the moving shaft can be adjusted, ensuring that the sealing assembly can effectively perform its sealing function under different working conditions.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] In this invention, when the multi-stage magnetic fluid sealing and leak-proof structure is working, the moving shaft rotates within the bushing. In the multi-stage magnetic fluid assembly, the magnet generates a magnetic field, which applies a force to the magnetic fluid within the moving shaft, causing the magnetic fluid to form a stable sealing barrier under the action of the magnetic field. The sealing assembly further enhances the sealing effect. When the moving shaft rotates, if displacement occurs due to vibration or other factors, the fixed plate moves accordingly. At this time, the limiting block slides within the limiting groove, and the telescopic spring plays a buffering and resetting role, ensuring that the limiting block fits tightly. The first rubber gasket further enhances the sealing performance, preventing the medium from leaking from the gap between the bushing and the moving shaft, thereby achieving a multi-stage and highly efficient sealing and leak-proof function. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a multi-stage magnetohydrodynamic sealing and leak-proof structure according to the present invention;

[0025] Figure 2 This is a structural breakdown diagram of a multi-stage magnetohydrodynamic sealing and leak-proof structure according to the present invention;

[0026] Figure 3 This is a schematic diagram of the moving shaft structure of a multi-stage magnetohydrodynamic sealing and leak-proof structure according to the present invention;

[0027] Figure 4 This is a schematic diagram of the bushing structure of a multi-stage magnetohydrodynamic sealing and leak-proof structure according to the present invention;

[0028] Figure 5 This is a cross-sectional view of the bushing structure of a multi-stage magnetohydrodynamic sealing and leak-proof structure according to this utility model.

[0029] Figure label:

[0030] 1. Bushing;

[0031] 2. Multi-stage magnetohydrodynamic assembly; 21. Moving shaft; 22. Support plate; 23. Support ring; 24. Magnet; 25. Ball bearing; 26. Bearing;

[0032] 3. Sealing assembly; 31. Limiting groove; 32. Telescopic spring; 33. Fixing plate; 34. Limiting block; 35. First rubber pad; 36. Second rubber pad; 37. Bolt. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figures 1-5 As shown, this embodiment provides a technical solution: a multi-stage magnetohydrodynamic sealing and leak-proof structure, comprising:

[0035] Bushing 1;

[0036] Multi-stage magnetofluid assembly 2 is placed inside the bushing 1. The multi-stage magnetofluid assembly 2 includes a moving shaft 21 disposed inside the bushing 1. Magnetofluid is disposed inside the moving shaft 21. A support plate 22 is fixed inside the bushing 1. A support ring 23 is fixed on the support plate 22. A magnet 24 is fixed on the top of the support ring 23.

[0037] The sealing assembly 3 is placed on the bushing 1. The sealing assembly 3 includes a limiting groove 31 on one side of the bushing 1, with a telescopic spring 32 fixed inside the limiting groove 31. A fixing plate 33 is rotatably connected to the moving shaft 21 near the limiting groove 31. A limiting block 34 is fixed to the fixing plate 33 near the limiting groove 31, and a first rubber pad 35 is fixed to the limiting block 34. This multi-stage magnetic fluid sealing leak-proof structure mainly consists of the moving shaft 21, the bushing 1, the multi-stage magnetic fluid assembly 2, and the sealing assembly 3. During operation, the moving shaft 21 rotates at high speed inside the bushing 1. The magnet 24 in the multi-stage magnetic fluid assembly 2 generates a strong magnetic field, applying force to the magnetic fluid inside the moving shaft 21, causing the magnetic fluid to form a stable sealing barrier under the action of the magnetic field, effectively preventing media leakage. The sealing assembly 3 further assists in strengthening the sealing effect, ensuring... The system's reliability under complex operating conditions is ensured by the following: when the moving shaft 21 experiences slight displacement due to vibration or other factors, the fixed plate 33 moves accordingly, the limiting block 34 slides within the limiting groove 31, and the telescopic spring 32 acts as a buffer and reset mechanism, ensuring that the limiting block 34 remains tightly fitted and preventing seal failure due to displacement. Simultaneously, the first rubber gasket 35 further enhances the sealing performance through elastic deformation, preventing media leakage from the gap between the bushing 1 and the moving shaft 21. This structure achieves multi-level and efficient sealing and leak-proof functions through the magnetic field effect of the magnetic fluid, the sliding adjustment of the limiting block 34, and the elastic sealing of the rubber gasket. The stability of the magnetic fluid and the adaptive adjustment capability of the sealing component 3 enable the structure to maintain excellent sealing performance under high pressure, high speed, and vibration conditions, effectively extending the service life of the equipment and improving operational reliability.

[0038] The above solutions also have the problem that when the moving shaft 21 rotates within the bushing 1, it cannot reduce the wear of components rotating within the bushing 1. Figures 3-5As shown: The moving shaft 21 is disposed within the support ring 23, which provides radial support for the moving shaft 21, ensuring its stability during rotation. The mating structure between the support ring 23 and the moving shaft 21 defines the movement trajectory of the moving shaft 21, enabling it to rotate smoothly around a predetermined axis. This stable rotation provides the basic conditions for magnetohydrodynamic sealing, ensuring the uniformity and reliability of the sealing barrier, thus laying a solid foundation for the overall leak-proof function. The support ring 23 contains ball bearings 25 located between the support ring 23 and the moving shaft 21, converting sliding friction into rolling friction. When the moving shaft 21 rotates, the ball bearings 25 roll, significantly reducing sliding friction. The friction between shaft 21 and support ring 23 reduces energy loss and improves rotation efficiency. At the same time, the use of ball bearings 25 reduces component wear and extends the service life of support ring 23 and moving shaft 21, ensuring long-term stable operation of the system. A bearing 26 is provided on one side of the moving shaft 21. The bearing 26 is installed on one side of the moving shaft 21 to enhance the smoothness of the rotation of the moving shaft 21. It can withstand the axial and radial loads generated by the moving shaft 21 during operation, reduce the vibration and displacement of the moving shaft 21. The supporting role of the bearing 26 ensures the stable operation of the magnetohydrodynamic sealing structure under complex working conditions, prevents seal failure caused by vibration or load changes, and improves the reliability of the system.

[0039] like Figures 1-5 As shown, the limiting block 34 is disposed within the limiting groove 31. The limiting block 34 moves within the limiting groove 31. When the moving shaft 21 is displaced due to vibration or other factors, the limiting block 34 restricts the excessive offset of the fixed plate 33 and the moving shaft 21. It works in conjunction with the telescopic spring 32 to provide buffering and reset functions, maintain the sealing performance of the sealing assembly 3, effectively prevent leakage caused by the displacement of the moving shaft 21, and ensure the stability of the sealing structure. A second rubber pad 36 is fixed on the side of the bushing 1 away from the limiting groove 31. The second rubber pad 36 is located at a specific position on the bushing 1 and is used to fill the gap that may exist between the bushing 1 and the external connecting parts. It utilizes the rubber's... The elasticity and sealing performance prevent the medium from leaking from the edge of the bushing 1. The second rubber gasket 36 further enhances the overall structure's leak-proof capability, ensuring that the medium will not leak from the connection between the bushing 1 and the external environment under complex working conditions. The fixing plate 33 is threaded with bolts 37, which are threaded onto the bushing 1. The bolts 37 securely connect the fixing plate 33 and the bushing 1. By adjusting the tightness of the bolts 37, the position of the fixing plate 33 and the constraint force on the moving shaft 21 can be adjusted, ensuring that the sealing assembly 3 can effectively perform its sealing function under different working conditions. At the same time, it is easy to maintain and adjust, improving the adaptability of the structure and the reliability of the sealing performance.

[0040] like Figures 1-5As shown, the multi-stage magnetofluid seal anti-leakage structure mainly consists of a bushing 1, a multi-stage magnetofluid assembly 2, and a sealing assembly 3. During operation, the moving shaft 21 rotates at high speed within the bushing 1. The magnet 24 in the multi-stage magnetofluid assembly 2 generates a strong magnetic field, which applies a force to the magnetofluid within the moving shaft 21, causing the magnetofluid to form a stable sealing barrier under the action of the magnetic field, effectively preventing media leakage. The support ring 23 provides radial support for the moving shaft 21, ensuring that the moving shaft 21 rotates smoothly around a predetermined axis, laying the foundation for the magnetofluid seal. The ball bearing 25 is located between the support ring 23 and the moving shaft 21, converting sliding friction into rolling friction, reducing friction, reducing energy loss, improving rotational efficiency, and extending component life. The bearing 26 is installed on one side of the moving shaft 21, bearing axial and radial loads, reducing vibration and displacement, and ensuring the stable operation of the magnetofluid seal structure under complex working conditions. The sealing assembly 3 further assists in strengthening the sealing effect. When the moving shaft 21 experiences slight displacement due to vibration or other factors... When the device moves, the fixed plate 33 moves accordingly, and the limiting block 34 slides within the limiting groove 31. The telescopic spring 32 provides buffering and reset functions to ensure that the limiting block 34 is always tightly fitted, avoiding seal failure. The first rubber gasket 35 enhances the sealing performance through elastic deformation, preventing the medium from leaking from the gap between the bushing 1 and the moving shaft 21. The second rubber gasket 36 fills the gap between the bushing 1 and the external connecting parts, blocking the medium from leaking from the edge of the bushing 1. The bolt 37 securely connects the fixed plate 33 to the bushing 1. By adjusting the tightness of the bolt 37, the position of the fixed plate 33 and the constraint force on the moving shaft 21 can be adjusted to ensure that the sealing assembly 3 effectively performs its sealing function under different working conditions. This structure achieves multi-level and efficient sealing and leak-proof functions through the magnetic field effect of the magnetohydrodynamics, the sliding adjustment of the limiting block 34, and the elastic sealing of the rubber gasket. It can maintain excellent sealing performance under high pressure, high speed, and vibration conditions, effectively extending the service life of the equipment and improving operational reliability.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A multi-stage magnetic fluid seal leak-proof structure, characterized in that, Include: The shaft sleeve (1); Multistage magnetic fluid assembly (2), the multistage magnetic fluid assembly (2) is placed inside the shaft sleeve (1), the multistage magnetic fluid assembly (2) includes the dynamic shaft (21) arranged inside the shaft sleeve (1), the dynamic shaft (21) is provided with magnetic fluid inside, the inside of the shaft sleeve (1) is fixed with the support plate (22), the support plate (22) is fixed with the support ring (23), the top of the support ring (23) is fixed with the magnet (24); Sealing assembly (3), the sealing assembly (3) is placed on the shaft sleeve (1), the sealing assembly (3) includes the limiting groove (31) opened in the one side of the shaft sleeve (1), the limiting groove (31) is fixed with the expansion spring (32) inside, the dynamic shaft (21) is rotatably connected with the fixed plate (33) on the side close to the limiting groove (31), the fixed plate (33) is fixed with the limiting block (34) on the side close to the limiting groove (31), the limiting block (34) is fixed with the first rubber pad (35).

2. The multi-stage magnetic fluid seal leak-proof structure according to claim 1, characterized in that: The dynamic shaft (21) is arranged in the support ring (23).

3. The multi-stage magnetic fluid seal leak protection structure of claim 1, wherein: The inside of the support ring (23) is provided with the ball (25).

4. The multi-stage magnetic fluid seal leak protection structure of claim 1, wherein: The side of the dynamic shaft (21) is provided with the bearing (26).

5. The multi-stage magnetic fluid seal leak protection structure of claim 1, wherein: The limiting block (34) is arranged in the limiting groove (31).

6. The multi-stage magnetic fluid seal leak protection structure of claim 1, wherein: The side, away from the limiting groove (31) of the shaft sleeve (1) is fixed with the second rubber pad (36).

7. The multi-stage magnetic fluid seal leak protection structure of claim 1, wherein: The fixed plate (33) is screw connected with the bolt (37), and the bolt (37) is screw connected on the shaft sleeve (1).

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