Magnetic bearing seal arrangement

Abstract

The utility model discloses a kind of magnetic system shaft bearing sealing devices, including bearing chamber, the side of bearing chamber is equipped with the accommodating cavity for accommodating bearing, the other side of bearing chamber is equipped with sealing ring, the side of sealing ring away from bearing chamber extends integral annular fixed part, bolt hole is opened on the annular fixed part, the diameter of the hole of sealing ring and the inner diameter of annular fixed part are compatible with the hole diameter of bearing chamber, at least two protruding annular teeth are equipped on the side wall of the side of sealing ring close to bearing chamber, the side wall of bearing chamber close to sealing ring is equipped with the annular tooth slot compatible with annular tooth, each annular tooth is inserted into corresponding annular tooth slot.The magnetic system shaft bearing sealing device of the utility model has good sealing effect and long service life.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separator technology, and more specifically, to a magnetic shaft bearing sealing device. Background Technology

[0002] A magnetic separator is a device used for mineral separation. Its main components include a cylinder, inside which is a magnetic shaft and a magnetic system. The magnetic shaft, serving as the support structure for the magnetic system, is rotatably connected to the cylinder via bearings and bearing housings. The bearings require lubrication to maintain lubrication, and sealing devices are needed to prevent lubricant leakage. Figure 1 This is a schematic diagram of an existing magnetic shaft bearing sealing device, for reference. Figure 1 Existing magnetic shaft bearing sealing devices include a magnetic shaft 1, on which a bearing 11 is fitted. The bearing 11 is located within the receiving cavity of a bearing chamber 12. A skeleton oil seal 13 is installed at the bottom of the receiving cavity of the bearing chamber 12 to achieve sealing. In this existing sealing structure, only one skeleton oil seal 13 serves as the seal. The skeleton oil seal 13 is made of rubber material, which ages over time, temperature, and media, especially certain chemical substances, leading to factors such as hardening, cracking, swelling, and shrinkage. This results in a decrease or failure of its sealing performance, making lubricating oil prone to leakage. In addition, this existing sealing structure is a contact seal. The sealing skeleton oil seal rotates around the magnetic shaft with the cylinder and bearing chamber. The lip of the skeleton oil seal continuously rubs against the surface of the magnetic shaft, inevitably causing wear. This means that the service life of the skeleton oil seal is significantly affected by factors such as the surface roughness, hardness, runout, eccentricity, lubrication condition, and contaminants of the magnetic shaft, resulting in a relatively short service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a magnetic shaft bearing sealing device with good sealing effect and long service life.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A magnetic shaft bearing sealing device includes a bearing chamber. One side of the bearing chamber has a receiving cavity for accommodating the bearing, and the other side of the bearing chamber has a sealing ring. The sealing ring extends from the side away from the bearing chamber and has an integrally formed annular fixing part. The annular fixing part has bolt holes. The diameter of the bottom central hole of the sealing ring and the inner diameter of the annular fixing part are adapted to the diameter of the bottom central hole of the bearing chamber. The side wall of the sealing ring near the bearing chamber has at least two raised annular teeth. The side wall of the bearing chamber near the sealing ring has an annular tooth groove adapted to the annular teeth. Each annular tooth is inserted into the corresponding annular tooth groove.

[0005] As a further improvement, the longitudinal section of the annular tooth is square or rectangular, and the longitudinal section of the annular tooth groove is square or rectangular.

[0006] As a further improvement, the annular tooth and the annular tooth groove are in a clearance fit.

[0007] As a further improvement, an oil seal is provided at the bottom of the receiving cavity.

[0008] As a further improvement, the oil seal is a skeleton oil seal.

[0009] As a further improvement, a through hole extending in the horizontal direction is provided on the bottom wall of the receiving cavity, opposite the oil seal.

[0010] After adopting the above technical solution, the beneficial effects of this utility model are: In use, the magnetic shaft bearing sealing device of this utility model consists of a bearing housing and a sealing ring fitted onto the magnetic shaft. Bolt holes are provided on the annular fixing part of the sealing ring, and a locking bolt is inserted into these holes to hold the sealing ring in place. Grease is added between the annular teeth of the sealing ring and the annular grooves of the bearing housing. This labyrinthine sealing structure provides at least two layers of sealing protection. A very small tortuous gap is formed between the rotating bearing housing and the fixed sealing ring to achieve a seal. This gap is filled with grease. This non-contact design eliminates mechanical wear. The tiny gap between the annular teeth and the annular grooves prevents physical contact during operation. Because there is no friction, the seal itself does not consume drive power, thus improving the overall mechanical efficiency of the equipment.

[0011] In this invention, a through hole extending horizontally is provided on the bottom wall of the receiving cavity, directly opposite the oil seal. When it is necessary to replace the skeleton oil seal, the sealing ring and bearing are removed, and a screwdriver or other tool can be inserted into the through hole to push out the oil seal for replacement. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the existing magnetic shaft bearing sealing device; Figure 2 This is a structural schematic diagram of the magnetic shaft bearing sealing device of this utility model; Figure 3 yes Figure 2 A schematic diagram of the sealing ring structure in the middle; Figure 4 yes Figure 2 A schematic diagram of the bearing housing structure; Figure 5 This is a schematic diagram of the magnetic shaft bearing sealing device of this utility model installed in the bearing; Figure 6 This is a schematic diagram of the magnetic shaft bearing sealing device of this utility model installed on the magnetic shaft; In the diagram: 1-Magnetic shaft; 11-Bearing; 12-Bearing chamber; 13-Skeleton oil seal; 2-Bearing chamber; 21-Receiving cavity; 22-Annular tooth groove; 23-Through hole; 24-Central hole; 3-Sealing ring; 31-Annular tooth; 32-Central hole; 33-Annular fixing part; 34-Bolt hole; 35-Locking bolt; 4-Oil seal; 5-Bearing; 6-Magnetic shaft. Detailed Implementation

[0013] 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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0014] Reference Figures 2 to 5 The magnetic shaft bearing sealing device of this utility model includes a bearing chamber 2. One side of the bearing chamber 2 is provided with a receiving cavity 21 for accommodating the bearing. The bottom of the receiving cavity 21 is provided with an oil seal 4, which can be a skeleton oil seal. The other side of the bearing chamber 2 is provided with a sealing ring 3. The side of the sealing ring 3 away from the bearing chamber 2 extends and is integrally provided with an annular fixing part 33. The annular fixing part 33 is provided with a bolt hole 34. The diameter of the bottom central hole 32 of the sealing ring 3 and the inner diameter of the annular fixing part 33 are adapted to the bottom central hole 24 of the bearing chamber 2, that is, they are both adapted to the diameter of the magnetic shaft 6 to be installed, which meets the requirement that the sealing ring 3 and the bearing chamber 2 are fitted on the magnetic shaft 6. The side wall of the sealing ring 3 near the bearing chamber 2 is provided with at least two raised annular teeth 31. The side wall of the bearing chamber 2 near the sealing ring 3 is provided with an annular tooth groove 22 adapted to the annular teeth 31. Each annular tooth 31 is inserted into the corresponding annular tooth groove 22.

[0015] The longitudinal section of the annular tooth 31 is square or rectangular, and the longitudinal section of the annular tooth groove 22 is square or rectangular.

[0016] The annular tooth 31 and the annular tooth groove 22 are in clearance fit, and the clearance is used to add grease.

[0017] Reference Figure 6In use, the magnetic shaft bearing sealing device of this utility model has a bearing chamber 2 and a sealing ring 3 fitted onto the magnetic shaft 6. A bolt hole 34 is provided on the annular fixing part of the sealing ring 3. A locking bolt 35 is inserted into the bolt hole 34 and tightened to hold the sealing ring on the magnetic shaft 6. Grease is added between the annular teeth 31 of the sealing ring 3 and the annular tooth groove 22 of the bearing chamber 2. This labyrinth-type sealing structure adds an extra layer of sealing protection. A very small tortuous gap is formed between the rotating bearing chamber 2 and the fixed sealing ring 3 to achieve sealing. The gap is filled with grease. This non-contact design eliminates mechanical wear. A small gap exists between the annular teeth 31 and the annular tooth groove 22, preventing physical contact during operation. Because there is no friction, the sealing ring remains stationary and does not consume driving power, thus improving the overall mechanical efficiency of the equipment.

[0018] In this invention, a through hole 23 extending horizontally is provided on the bottom wall of the receiving cavity 21, directly opposite the oil seal 4. When the oil seal 4 needs to be replaced, the sealing ring 3 and bearing 5 are removed, and a screwdriver or other tool can be inserted into the through hole 23 to push out the oil seal 4 for replacement, which facilitates the operation.

[0019] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A magnetic shaft bearing sealing device, comprising a bearing housing, wherein one side of the bearing housing is provided with a receiving cavity for accommodating the bearing, characterized in that: A sealing ring is provided on the other side of the bearing housing. An annular fixing part is integrally provided on the side of the sealing ring away from the bearing housing. Bolt holes are provided on the annular fixing part. The diameter of the bottom central hole of the sealing ring and the inner diameter of the annular fixing part are adapted to the diameter of the bottom central hole of the bearing housing. At least two raised annular teeth are provided on the side wall of the sealing ring near the bearing housing. An annular tooth groove adapted to the annular teeth is provided on the side wall of the bearing housing near the sealing ring. Each annular tooth is inserted into the corresponding annular tooth groove.

2. The magnetic shaft bearing sealing device according to claim 1, characterized in that: The longitudinal section of the annular tooth is square or rectangular, and the longitudinal section of the annular tooth groove is square or rectangular.

3. The magnetic shaft bearing sealing device according to claim 2, characterized in that: The annular tooth and the annular tooth groove are in a clearance fit.

4. The magnetic shaft bearing sealing device according to claim 3, characterized in that: An oil seal is provided at the bottom of the receiving cavity.

5. The magnetic shaft bearing sealing device according to claim 4, characterized in that: The oil seal is a skeleton oil seal.

6. The magnetic shaft bearing sealing device according to claim 4 or 5, characterized in that: A through hole extending horizontally is provided on the bottom wall of the receiving cavity, directly opposite the oil seal.

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