Magnetic fluid sealing structure

Abstract

The magnetic fluid sealing structure comprises an outer sleeve, an inner ring sleeve, a first magnetic ring and a second magnetic ring, the outer sleeve, the inner ring sleeve, the first magnetic ring and the second magnetic ring are coaxially arranged, the inner ring sleeve is located in an inner ring of the outer sleeve, the second magnetic ring is located in a groove of the outer sleeve, the first magnetic ring is located in a groove of the inner ring sleeve, and the second magnetic ring is located in a groove of the outer sleeve. The same magnetic poles of the first magnetic ring and the second magnetic ring are oppositely arranged, a gap is formed between the first magnetic ring and the second magnetic ring, and the magnetic fluid is placed in the gap, so that a dynamic O-shaped ring formed by the magnetic fluid under the action of a magnetic field has high adaptability and stability, leakage of a gas or liquid medium can be effectively prevented, and the service life of the gas or liquid medium is prolonged. And the device is suitable for high-vacuum environments or corrosive medium treatment occasions. The like magnetic poles of the first magnetic ring and the second magnetic ring are oppositely arranged, strong repulsive force is generated, it is ensured that the magnetofluid forms evenly-distributed liquid rings in a gap between the first magnetic ring and the second magnetic ring, and the sealing effect is further enhanced.

Description

Technical Field

[0001] This application relates to the field of magnetic fluid sealing technology, specifically a magnetic fluid sealing structure. Background Technology

[0002] In industrial applications, especially when sealing dynamic components such as rotating shafts is involved, traditional mechanical sealing methods (such as using O-rings and mechanical seals) often face numerous challenges. While these traditional methods can provide effective seals in certain situations, mechanical seals typically require direct contact with the rotating shaft, leading to friction and wear. This shortens the seal's lifespan and increases maintenance costs. Furthermore, prolonged operation may result in wear or aging, causing a decline in sealing performance and increasing the risk of media leakage. Summary of the Invention

[0003] The technical problem to be solved by this application is to overcome the existing defects and provide a magnetohydrodynamic sealing structure that can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: a magnetic fluid sealing structure, comprising an outer sleeve, an inner ring sleeve, a first magnetic ring, and a second magnetic ring. The outer sleeve, the inner ring sleeve, the first magnetic ring, and the second magnetic ring are all coaxially arranged, with the inner ring sleeve located in the inner ring of the outer sleeve, the second magnetic ring located in the groove of the outer sleeve, and the first magnetic ring located in the groove of the inner ring sleeve. The same magnetic poles of the first magnetic ring and the second magnetic ring are arranged opposite each other, and a gap is provided between the first magnetic ring and the second magnetic ring, with magnetic fluid placed in the gap.

[0005] As a preferred technical solution of this application, the outer sleeve is concave in design and has a groove corresponding to the inner ring sleeve.

[0006] As a preferred technical solution of this application, the inner ring sleeve is designed with a boss, and the boss is correspondingly set with the groove of the inner ring sleeve.

[0007] As a preferred technical solution of this application, a gap is provided between the opposing surfaces of the inner ring and the outer ring.

[0008] Compared with existing technologies, this application utilizes the highly adaptable and stable dynamic "O"-ring formed by the magnetofluid under the influence of a magnetic field. This effectively prevents leakage of gaseous or liquid media, making it suitable for high-vacuum environments or applications handling corrosive media. The first and second magnetic rings, with their like magnetic poles facing each other, generate a strong repulsive force, ensuring that the magnetofluid forms a uniformly distributed liquid ring in the gap between them, further enhancing the sealing effect. Even under rotation, the magnetofluid sealing layer maintains a good sealing effect, ensuring dynamic stability and making it suitable for sealing requirements of dynamic components such as high-speed rotating shafts. Due to the fluidity of the magnetofluid and its stable distribution in a magnetic field, this sealing structure has strong vibration resistance, providing reliable sealing even in vibrating environments. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this application;

[0010] Figure 2 This is a schematic diagram of the outer garment structure;

[0011] Figure 3 This is a schematic diagram of the inner ring structure;

[0012] Figure 4 This is a schematic diagram of the cross-sectional structure of this application;

[0013] Figure 5 for Figure 4 Enlarged structural diagram at point C.

[0014] In the diagram: 1. Outer ring, 2. Inner ring, 3. First magnetic ring, 4. Second magnetic ring. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] Please see Figure 1-5 This application provides a technical solution: a magnetic fluid sealing structure, including an outer sleeve 1, an inner ring sleeve 2, a first magnetic ring 3, and a second magnetic ring 4. The outer sleeve 1, the inner ring sleeve 2, the first magnetic ring 3, and the second magnetic ring 4 are all coaxially arranged, with the inner ring sleeve 2 located in the inner ring of the outer sleeve 1, the second magnetic ring 4 located in the groove of the outer sleeve 1, and the first magnetic ring 3 located in the groove of the inner ring sleeve 2. The same magnetic poles of the first magnetic ring 3 and the second magnetic ring 4 are arranged opposite each other, and a gap is provided between the first magnetic ring 3 and the second magnetic ring 4, with magnetic fluid placed in the gap.

[0017] Outer jacket 1 serves as the outer frame for the entire magnetohydrodynamic sealing structure, providing physical protection and ensuring sufficient mechanical strength and durability.

[0018] The outer sleeve 1 ensures that the inner ring 2, the first magnetic ring 3, and the second magnetic ring 4 can be set on the same axis, thereby forming an efficient and stable magnetic field environment.

[0019] The inner ring sleeve 2 is typically fitted onto the rotating shaft that needs to be sealed, and the first magnetic ring 3 is accommodated in its groove. This ensures that the inner ring sleeve 2 can rotate with the rotating shaft while maintaining precise alignment with the outer ring sleeve 1, thereby maintaining the stability of the magnetohydrodynamic sealing layer.

[0020] The second magnetic ring 4 and the first magnetic ring 3 together generate a strong magnetic field, which acts on the magnetic fluid, causing it to form a uniformly distributed liquid "O" ring in the gap between them. This not only prevents the leakage of the medium, but also ensures the dynamic stability of the sealing layer. Even in the rotating state, it can maintain a good sealing effect, ensuring that the magnetic fluid can form a stable sealing layer in the gap between them, thus providing a guarantee for the stability and uniformity of the magnetic field.

[0021] Magnetofluid is attracted and concentrated in this region under the influence of a magnetic field, forming a dynamic sealing layer.

[0022] The gap is located between the first magnetic ring 3 and the second magnetic ring 4. It is a space filled with magnetic fluid. The gap width is between 0.2 and 0.6 mm. The reasonable gap width can ensure the optimal distribution of magnetic fluid under the action of magnetic field, thereby achieving efficient sealing.

[0023] Furthermore, the outer sleeve 1 has a concave design, with grooves corresponding to the inner ring sleeve 2.

[0024] Furthermore, the inner ring sleeve 2 is designed with a boss, and the boss is set to correspond with the groove of the inner ring sleeve 2.

[0025] Specifically, the outer sleeve 1 is provided with groove 1, groove 2 and groove 3, and the inner ring sleeve 2 is provided with boss 1, boss 2 and groove 4. Boss 1 and boss 2 are provided in correspondence with groove 1 and groove 3, which can make precise fit between the outer sleeve 1 and the inner ring sleeve 2 and improve assembly efficiency. Secondly, groove 2 and groove 4 are used to place the second magnetic ring 4 and the first magnetic ring 3 respectively. Since the same magnetic poles of the second magnetic ring 4 and the first magnetic ring 3 are opposite each other, the second magnetic ring 4 and the first magnetic ring 3 can be stably placed in the groove 2 and groove 4, and a certain gap can be maintained between the outer sleeve 1 and the inner ring sleeve 2 to ensure that the magnetic fluid forms a stable sealing layer in the gap.

[0026] Furthermore, a gap is provided between the opposing surfaces of the inner ring 2 and the outer ring 1.

[0027] More specifically, such as Figure 5 As shown, a gap is provided between the B side of the inner ring 2 and the A side of the outer ring 1.

[0028] In use: Carefully place the first magnetic ring 3 into the groove four of the inner ring sleeve 2, ensuring that the first magnetic ring 3 is stable and correctly positioned, so that it fits tightly with the inner ring sleeve 2. Place the second magnetic ring 4 into the groove two of the outer sleeve 1, similarly ensuring that the second magnetic ring 4 is accurately positioned and stable. Carefully insert the inner ring sleeve 2 into the inner ring of the outer sleeve 1. Ensure that the bosses one and two on the inner ring sleeve 2 are aligned and tightly fitted with the grooves one and three on the outer sleeve 1, respectively. The precise fit between the bosses and grooves can improve assembly efficiency and ensure that the gap between the outer sleeve 1 and the inner ring sleeve 2 remains stable. Evenly apply or inject an appropriate amount of magnetic fluid into the gap between the first magnetic ring 3 and the second magnetic ring 4 to ensure that the magnetic fluid can form an optimal distribution under the action of the magnetic field, thereby ensuring the effectiveness of the magnetic fluid sealing layer.

[0029] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetic fluid seal structure, characterized by: The application relates to a magnetic fluid flow control device, which comprises a sleeve (1), an inner ring sleeve (2), a first magnetic ring (3) and a second magnetic ring (4), wherein the sleeve (1), the inner ring sleeve (2), the first magnetic ring (3) and the second magnetic ring (4) are coaxially arranged, the inner ring sleeve (2) is arranged in the inner ring of the sleeve (1), the second magnetic ring (4) is arranged in the groove of the sleeve (1), the first magnetic ring (3) is arranged in the groove of the inner ring sleeve (2), the same magnetic poles of the first magnetic ring (3) and the second magnetic ring (4) are arranged oppositely, a gap is arranged between the first magnetic ring (3) and the second magnetic ring (4), and a magnetic fluid is arranged in the gap.

2. A structure for sealing a magnetic fluid as set forth in claim 1, wherein: The sleeve (1) is designed in a concave mode, and a groove corresponding to the inner ring sleeve (2) is arranged on the sleeve (1).

3. A magnetic fluid seal according to claim 1, wherein: The inner ring sleeve (2) is designed in a convex mode, and the convex mode is arranged in correspondence with the groove of the inner ring sleeve (2).

4. A magnetic fluid seal according to any one of claims 1 to 3, wherein: A gap is arranged between the opposite surfaces of the inner ring sleeve (2) and the sleeve (1).

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