Efficient magnetofluid sealing device

Abstract

The utility model relates to the technical field of magnetic fluid sealing devices, and discloses a high-efficiency magnetic fluid sealing device, which comprises a rotating shaft and a shaft sleeve rotationally sleeved outside the rotating shaft, and two bearings arranged at intervals are arranged in the shaft sleeve and between the rotating shaft in an interference fit manner. Two magnetizers are further embedded in the shaft sleeve, two pole shoe sleeves are fixedly arranged on the rotating shaft in a sleeved mode, a plurality of protruding magnetic attraction protruding rings are arranged on the opposite faces of the pole shoe sleeves and the magnetizers at intervals, and the permanent magnet is arranged between the two magnetizers. According to the utility model, the refrigerant is introduced into the liquid inlet to cool the permanent magnet, and the refrigerant carrying heat is discharged from the liquid outlet to form cold circulation, so that the working temperature of the magnetofluid seal is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic fluid sealing devices, in particular to a high-efficiency magnetic fluid sealing device. Background Art

[0002] Magnetic fluid sealing devices mainly use magnetic fluid to achieve vacuum sealing, and their function is to transfer rotational motion to the sealing device. At present, magnetic fluid sealing devices have been used in many devices. In some devices, hot oil needs to be transported through the rotating shaft on the magnetic fluid sealing device, and the temperature of the hot oil can usually reach more than 200 degrees Celsius on the pole shoe. Excessive temperature is likely to cause the magnetic fluid on the magnetic fluid sealing device to demagnetize, resulting in damage to the magnetic fluid. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the above problems, a high-efficiency magnetic fluid sealing device is provided, which solves the above problems.

[0004] The utility model solves the technical problem by adopting the following technical solutions:

[0005] A high-efficiency magnetic fluid sealing device comprises a rotating shaft and a sleeve rotatably sleeved on the outside of the rotating shaft, two bearings arranged at intervals are interference fit between the sleeve and the rotating shaft, two magnetizers are also embedded in the sleeve, two pole shoe sleeves are sleeved and fixed on the rotating shaft, and a plurality of raised magnetic convex rings are spaced apart from each other on the opposing surfaces of the pole shoe sleeves and the magnetizers, a permanent magnet is arranged between the two magnetizers, and under the magnetic attraction of the permanent magnet and the magnetic conductivity of the magnetizer, the magnetic fluid forms a sealing ring located between the sealing ring, the magnetizer and the pole shoe sleeves.

[0006] Preferably, two threaded through holes are symmetrically provided on the side of the shaft sleeve, and are respectively connected with a liquid inlet and a liquid outlet.

[0007] Preferably, a waterproof ring is provided between the magnetic conductor and the inner wall of the sleeve.

[0008] Preferably, both ends of the permanent magnet are embedded in the magnetic conductor.

[0009] Preferably, waterproof sealing ring sleeves are sleeved on both ends of the permanent magnet and are embedded in the magnetizer together with the waterproof sealing ring sleeves to form a seal, so that an annular cooling cavity is formed between the permanent magnet, the magnetizer and the shaft sleeve.

[0010] Preferably, an end cover is fixed by screws at the right end of the sleeve for sealing the end.

[0011] Preferably, a plurality of cooling gap grooves are provided at intervals on the outer side wall of the permanent magnet to increase the cooling area.

[0012] The advantages and positive effects of the utility model are: the refrigerant is introduced into the liquid inlet to cool the permanent magnet, and the refrigerant carrying heat is discharged from the liquid discharge port to form a cold cycle, which effectively reduces the working temperature of the magnetic fluid seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model. DETAILED DESCRIPTION

[0016] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0017] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0018] like Figure 1-2 As shown, a high-efficiency magnetic fluid sealing device described in the utility model includes a rotating shaft 10 and a sleeve 11 rotatably sleeved on the outside of the rotating shaft 10, two bearings 12 are interference fitly arranged in the sleeve 11 and between the rotating shaft 10, two magnetizers 15 are also embedded in the sleeve 11, two pole shoe sleeves 20 are sleeved and fixed on the rotating shaft 10, and a plurality of raised magnetic convex rings are spaced between the opposing surfaces of the pole shoe sleeves 20 and the magnetizers 15, a permanent magnet 18 is arranged between the two magnetizers 15, and under the magnetic attraction of the permanent magnet 18 and the magnetic conductivity of the magnetizer 15, the magnetic fluid 21 forms a sealing ring located between the magnetizer 15 and the pole shoe sleeves 20.

[0019] Preferably, two threaded through holes are symmetrically provided on the side of the shaft sleeve 11 , and are respectively connected to a liquid inlet 14 and a liquid outlet 13 .

[0020] Preferably, a waterproof ring 16 is provided between the magnetic conductor 15 and the inner wall of the shaft sleeve 11 .

[0021] Preferably, two ends of the permanent magnet 18 are embedded in the magnetizer 15 .

[0022] Preferably, waterproof sealing rings 22 are sleeved on both ends of the permanent magnet 18 and are embedded in the magnetizer 15 together with the waterproof sealing rings 22 to form a seal, so that an annular cooling cavity is formed between the permanent magnet 18, the magnetizer 15 and the sleeve 11.

[0023] Preferably, an end cover 17 is fixed by screws at the right end of the shaft sleeve 11 for sealing the end.

[0024] Preferably, a plurality of cooling gap grooves 19 are provided at intervals on the outer side wall of the permanent magnet 18 to increase the cooling area.

[0025] In specific implementation, the refrigerant is introduced into the liquid inlet 14 to cool the permanent magnet 18, and the refrigerant carrying heat is discharged from the liquid discharge port 13 to form a cold cycle, which effectively reduces the working temperature of the magnetic fluid seal.

[0026] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A high-efficiency magnetic fluid sealing device, comprising a rotating shaft (10) and a sleeve (11) rotatably sleeved on the outside of the rotating shaft (10), characterized in that: Two bearings (12) are provided in an interference fit between the shaft sleeve (11) and the rotating shaft (10), and two magnetizers (15) are also embedded in the shaft sleeve (11). Two pole shoe sleeves (20) are fixedly mounted on the rotating shaft (10), and a plurality of raised magnetic rings are provided at intervals between the opposing surfaces of the pole shoe sleeves (20) and the magnetizers (15). A permanent magnet (18) is provided between the two magnetizers (15). Under the magnetic attraction of the permanent magnet (18) and the magnetic conductivity of the magnetizer (15), the magnetic fluid (21) forms a sealing ring located between the magnetizer (15) and the pole shoe sleeves (20).

2. A high-efficiency magnetic fluid sealing device according to claim 1, characterized in that: Two threaded through holes are symmetrically arranged on the side of the shaft sleeve (11), and are respectively connected to a liquid inlet (14) and a liquid outlet (13).

3. A high-efficiency magnetic fluid sealing device according to claim 2, characterized in that: A waterproof ring (16) is provided between the magnetic conductor (15) and the inner wall of the shaft sleeve (11).

4. A high-efficiency magnetic fluid sealing device according to claim 3, characterized in that: Both ends of the permanent magnet (18) are embedded in the magnetic conductor (15).

5. A high-efficiency magnetic fluid sealing device according to claim 4, characterized in that: Waterproof sealing ring sleeves (22) are sleeved on both ends of the permanent magnet (18) and are embedded in the magnetizer (15) together with the waterproof sealing ring sleeves (22) to form a seal, so that an annular cooling cavity is formed between the permanent magnet (18), the magnetizer (15) and the shaft sleeve (11).

6. A high-efficiency magnetic fluid sealing device according to claim 5, characterized in that: An end cover (17) is fixed at the right end of the shaft sleeve (11) by screws for sealing the end.

7. A high-efficiency magnetic fluid sealing device according to claim 6, characterized in that: A plurality of cooling gap grooves (19) are arranged at intervals on the outer side wall of the permanent magnet (18) to increase the cooling area.

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