High-pressure-resistant magnetofluid sealing transmission device

Abstract

The utility model discloses a high-pressure-resistant magnetofluid sealing transmission device which comprises a shell, a rotating shaft is arranged in the shell, four fixing grooves are formed in the outer side wall of the rotating shaft, pole shoes are fixed in the fixing grooves, permanent magnets are arranged between every two pole shoes, an end cover is arranged on the outer side of the rotating shaft in a sleeved mode, and the end cover is arranged on the outer side of the rotating shaft in a sleeved mode. The end cover is fixedly connected with the shell, and the outer side wall of the pole shoe is in contact with the inner side wall of the shell. By arranging the four pole shoes and the three permanent magnets, more magnetic fluid sealing stages can be formed, and higher sealing pressure strength can be borne.

Description

Technical Field

[0001] This utility model relates to the field of magnetic fluid sealing technology, specifically a high-pressure resistant magnetic fluid sealing transmission device. Background Technology

[0002] The working principle of a magnetohydrodynamic (MHD) transmission device is based on the magnetorheological effect, adjusting the transmission torque by controlling the electric field strength. The MHD transmission device mainly consists of a magnetorheologist, a transmission connector, and a control system. The magnetorheologist is the core component, filled with a magnetorheological fluid containing magnetic powder. When the magnetorheologist is in a field-free state, the magnetic powder in the fluid is randomly arranged, resulting in low transmission torque; when the fluid is in an electric field, the magnetic powder is arranged in an ordered manner, enhancing the magnetic force transmission effect and increasing the transmission torque.

[0003] Existing magnetohydrodynamic (MHD) transmission devices have few internal MHD sealing stages and weak strength to withstand higher sealing pressures. They cannot meet the special process requirements such as vacuum heat treatment. Vacuum heat treatment generates negative and positive pressures, and the existing traditional MHD transmission devices do not have the ability to operate normally under the conditions of switching between negative and positive pressures. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a high-pressure resistant magnetohydrodynamic sealing transmission device, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure resistant magnetohydrodynamic sealing transmission device, comprising a housing, a rotating shaft inside the housing, four fixing grooves on the outer wall of the rotating shaft, pole shoes fixed inside the fixing grooves, permanent magnets between each pair of the four pole shoes, bearings on the left and right sides inside the housing, the outer wall of the outer ring of the bearing fitting against the inner wall of the housing, the outer wall of the rotating shaft fitting against the inner wall of the inner ring of the bearing, spacers fixed on the opposite sides of the inner wall of the housing near the two bearings, flange structures integrally formed at both ends of the housing, an end cap fitted on the outer side of the rotating shaft, the end cap being fixedly connected to the housing, and the outer wall of the pole shoes contacting the inner wall of the housing.

[0006] Preferably, the outer wall of the rotating shaft has slots on both the left and right sides of the bearing on the left side, and retaining rings are engaged inside the slots.

[0007] Preferably, annular grooves are provided on the left and right sides of the two central pole shoes and on the opposite sides of the two side pole shoes, and the two sides of the permanent magnet are located inside the annular grooves. Beneficial effects

[0008] This invention provides a high-pressure resistant magnetohydrodynamic sealing transmission device. Compared with the prior art, it has the following advantages:

[0009] 1. This high-pressure resistant magnetic fluid sealing transmission device, by setting four pole shoes and three permanent magnets, can form a greater number of magnetic fluid sealing stages and withstand higher sealing pressure.

[0010] 2. This high-pressure resistant magnetic fluid sealing transmission device, by setting a slot and retaining rings, with the retaining rings located inside the slot and the two retaining rings located on both sides of the left bearing, can prevent the bearing from wobbling left and right. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the shell in this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the rotating shaft in this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the rotating shaft and retaining ring in this utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the pole shoe in this utility model.

[0016] In the diagram: 1. Shaft; 2. End cap; 3. Flange structure; 4. Housing; 5. Permanent magnet; 6. Pole shoe; 7. Spacer ring; 8. Bearing; 9. Slot; 10. Fixing slot; 11. Retaining ring; 12. Annular groove. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-5This utility model provides a technical solution: a high-pressure resistant magnetohydrodynamic sealing transmission device, including a housing 4, a rotating shaft 1 inside the housing 4, four fixing grooves 10 on the outer side wall of the rotating shaft 1, pole shoes 6 fixed inside the fixing grooves 10, and permanent magnets 5 between each pair of the four pole shoes 6. Bearings 8 are provided on the left and right sides inside the housing 4, the outer side wall of the outer ring of the bearing 8 is in contact with the inner side wall of the housing 4, the outer side wall of the rotating shaft 1 is in contact with the inner side wall of the inner ring of the bearing 8, and the inner side wall of the housing 4 is close to the opposite side of the two bearings 8. Each side is fixed with a spacer ring 7. Both ends of the housing 4 are integrally formed with flange structures 3. The outer side of the rotating shaft 1 is fitted with an end cap 2, which is fixedly connected to the housing 4. The outer side wall of the pole shoe 6 is in contact with the inner side wall of the housing 4, which can form more magnetohydrodynamic sealing stages and withstand higher sealing pressure. The left and right sides of the two middle pole shoes 6 and the opposite sides of the two side pole shoes 6 are provided with annular grooves 12. The two sides of the permanent magnet 5 are located inside the annular grooves 12, which can limit the permanent magnet 5 and prevent it from moving.

[0019] Furthermore, the outer wall of the rotating shaft 1 is provided with slots 9 on both the left and right sides of the left bearing 8. A retaining ring 11 is engaged inside the slot 9, which can fix the rotating shaft 1 and prevent it from moving to the left.

[0020] During operation, first insert the left retaining ring 11 into the left retaining groove 9, then insert the left bearing 8 into the outside of the rotating shaft 1. Next, insert the right retaining ring 11 into the right retaining groove 9, then insert the left spacer 7, install the pole shoe 6 and permanent magnet 5 on the rotating shaft 1, and finally insert the right spacer 7 and right bearing 8 into the rotating shaft 1. Insert the rotating shaft 1 into the inside of the housing 4, install the upper end cover 2, and the installation is complete. In this way, the four pole shoes 6 and the three permanent magnets 5 can form a greater number of magnetohydrodynamic sealing levels and can withstand higher sealing pressure strength.

[0021] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high pressure resistant magneto fluid seal transmission device comprising a housing (4) characterised in that: The inside of the shell (4) is provided with a rotating shaft (1), the outer side wall of the rotating shaft (1) is provided with four fixed grooves (10), the inside of the fixed groove (10) is fixedly provided with a pole shoe (6), two of the four pole shoes (6) are provided with a permanent magnet (5), the outer side of the rotating shaft (1) is provided with an end cover (2), the end cover (2) is fixedly connected with the shell (4), and the outer side wall of the pole shoe (6) is in contact with the inner side wall of the shell (4).

2. A high pressure resistant MHD sealed transmission device according to claim 1, characterized in that: The outer side wall of the rotating shaft (1) is provided with a clamping groove (9) on the left and right sides of the left bearing (8), and the clamping groove (9) is clamped with a check ring (11).

3. A high pressure resistant MHD sealed transmission device according to claim 2, characterized in that: The left and right sides of the two middle pole shoes (6) and the opposite sides of the two side pole shoes (6) are provided with ring grooves (12), and the two sides of the permanent magnet (5) are located in the ring grooves (12).

4. A high pressure resistant MHD sealed transmission device according to claim 3, characterized in that: The inside of the shell (4) is provided with a bearing (8) on the left and right sides, the outer side wall of the bearing (8) outer ring is in close contact with the inner side wall of the shell (4), and the outer side wall of the rotating shaft (1) is in close contact with the inner side wall of the bearing (8) inner ring.

5. A high pressure resistant MHD sealed transmission device according to claim 4, characterized in that: The inner side wall of the shell (4) is fixedly provided with a partition ring (7) on the opposite sides of the two bearings (8).

6. A high pressure resistant MHD sealed transmission device according to claim 5, characterized in that: The both ends of the shell (4) are integrally provided with a flange structure (3).

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