Anti-radiation magnetic liquid sealing device with magnetic liquid storage and supplementing function

Abstract

The application discloses a magnetic liquid sealing device with anti-radiation and magnetic liquid storage and supplement functions, and belongs to the technical field of mechanical engineering sealing. The device comprises a rotating shaft, a shell, a clasp spring I, a left bearing, a clasp spring II, a left magnetic isolation sleeve, a stator core I, a winding coil I, a left pole shoe, magnetic liquid, a permanent magnet, a right pole shoe, a stator core II, a winding coil II, an outer magnetic isolation sleeve, an inner magnetic isolation sleeve, a right bearing, an end cover, a clasp spring III, a Peltier element III, a magnetic liquid storage bin II, a right sealing ring, a Peltier element II, an anti-radiation shaft sleeve, a left sealing ring, a magnetic liquid storage bin I and a Peltier element I. In a special nuclear radiation environment, the anti-radiation shaft sleeve is used to provide radiation protection for the permanent magnet, the Peltier element is used to cool the permanent magnet and the electromagnet assembly, the magnetization performance of the permanent magnet and the electromagnet assembly is ensured, the magnetic liquid is adsorbed from the magnetic liquid storage bin to the pole teeth by using a magnetic field gradient for supplement, and finally the sealing performance of the magnetic liquid sealing device is ensured and the reliability of the magnetic liquid sealing device is improved.

Description

Technical Field

[0001] This invention belongs to the field of mechanical engineering sealing technology, specifically relating to a radiation-resistant magnetic liquid sealing device with magnetic fluid storage and replenishment functions. Background Technology

[0002] Sealing is an important technical means to prevent the sealed medium from leaking between adjacent mating surfaces and to prevent external impurities from entering the interior of machinery and equipment. Magnetic liquid seals are a type of non-contact seal, and due to their advantages such as zero leakage, no pollution, and long service life, they are widely used in industrial equipment.

[0003] In the nuclear energy field, ensuring proper radiation safety is crucial for the operation of many equipment components, thus placing higher demands on the radiation resistance of sealed parts. Under these special conditions, prolonged radiation can cause localized temperature increases in magnetic liquid sealing devices, reducing the magnetization performance of permanent magnets. Simultaneously, radiation can alter the performance parameters of the magnetic liquid, ultimately affecting the reliability of the magnetic liquid sealing device. Therefore, there is a need for a radiation-resistant magnetic liquid sealing device that can reduce localized temperature and has magnetic liquid storage and replenishment functions. Summary of the Invention

[0004] This invention proposes a radiation-resistant magnetic liquid sealing device with good radiation protection performance, which can reduce local temperature and has magnetic liquid storage and replenishment functions. The purpose is to solve a series of impacts and damages of the nuclear radiation environment on the magnetic liquid sealing device and ensure the reliability of the sealing device.

[0005] The technical solution adopted in this invention is: a radiation-resistant magnetic liquid sealing device with magnetic liquid storage and replenishment function. The device consists of: a rotating shaft (1), a shell (2), a snap ring I (3), a left bearing (4), a snap ring II (5), a left magnetic isolation sleeve (6), a stator core I (7), a winding coil I (8), a left pole shoe (9), a magnetic liquid (10), a permanent magnet (11), a right pole shoe (12), a stator core II (13), a winding coil II (14), an outer magnetic isolation sleeve (15), an inner magnetic isolation sleeve (16), a right bearing (17), an end cap (18), a snap ring III (19), a Peltier III (20), a magnetic liquid storage chamber II (21), a right sealing ring (22), a Peltier II (23), a radiation-resistant bushing (24), a left sealing ring (25), a magnetic liquid storage chamber I (26), and a Peltier I (27).

[0006] The connection between the various parts of the device is as follows: several Peltier I (27), Peltier II (23), and Peltier III (20) are evenly provided on the right side of the left magnetic shielding sleeve (6), the outer side of the permanent magnet (11), and the left side of the outer magnetic shielding sleeve (15), forming a left magnetic shielding sleeve (6) with Peltier I (27), a permanent magnet (11) with Peltier II (23), and an outer magnetic shielding sleeve (15) with Peltier III (20); the winding coil I (8) is wound on the stator core I (7) to form electromagnet assembly I, and the winding coil II (14) is wound on the stator core II (13) to form electromagnet assembly II; the outer circular surfaces of the left pole shoe (9) and the right pole shoe (12) are provided with annular grooves, and the left sealing ring (25) and the right sealing ring (22) are respectively installed. Installed in the corresponding grooves, forming a left pole shoe (9) with a left sealing ring (25) and a right pole shoe (12) with a right sealing ring (22); the snap ring I (3), left bearing (4), snap ring II (5), left magnetic sleeve (6) with Peltier I (27), electromagnet assembly I, left pole shoe (9) with a left sealing ring (25), permanent magnet (11) with Peltier II (23), anti-radiation bushing (24), right pole shoe (12) with a right sealing ring (22), electromagnet assembly II, outer magnetic sleeve (15) with Peltier III (20), inner magnetic sleeve (16), right bearing (17), snap ring III (19) are installed on the rotating shaft (1) from left to right, and then installed into the outer shell (2); the end cap (18) is connected to the outer shell (2) by screws.

[0007] Limiting bosses are provided on the right side of the left pole shoe (9) and the left side of the right pole shoe (12) to provide axial and radial positioning for the permanent magnet (11). The permanent magnet (11) is located between the left pole shoe (9) and the right pole shoe (12). The width of the anti-radiation bushing (24) is the same as the width of the permanent magnet (11) and is also located between the left pole shoe (9) and the right pole shoe (12).

[0008] The permanent magnet (11) is an axially magnetized permanent magnet with a cross-sectional shape of a polygon with a central circular hole. The longest diagonal length of the cross-section of the permanent magnet (11) is less than the inner diameter of the anti-radiation bushing (24). The diameter of the central through hole of the permanent magnet (11) is the same as the outer diameter of the limiting boss on the right side of the left pole shoe (9) and the left side of the right pole shoe (12). The Peltier II (23) is evenly distributed on the outer side of the permanent magnet (11), and there are several of them. The cooling surface punches the permanent magnet (11), and the heat dissipation surface punches the gap between the permanent magnet (11) and the anti-radiation bushing (24).

[0009] The left pole shoe (9) is annular, and the right pole shoe (12) is designed as partly annular and partly frustum, with the frustum portion accounting for 0% to 100%, the smaller bottom surface of the frustum facing to the right, and the angle between the generatrix of the frustum and the horizontal direction ranging from 0° to 90°; the rotating shaft (1) has a frustum-shaped shoulder at the corresponding position of the frustum portion of the right pole shoe (12), the larger bottom surface of the frustum facing to the right, and the generatrix of the frustum portion of the rotating shaft (1) is parallel to that of the frustum portion of the right pole shoe (12); the rotating shaft (1) has several pole teeth at the corresponding positions of the left pole shoe (9) and the right pole shoe (12); there is a gap between the pole teeth on the rotating shaft (1) and the inner circular surface of the left pole shoe (9) and the right pole shoe (12), and magnetic liquid (10) is injected into the gap to form a magnetic liquid seal;

[0010] The rotating shaft (1) has an annular shoulder at the corresponding position of the electromagnet assembly II. The outer diameter of the annular shoulder is the same as the larger bottom diameter of the frustum-shaped shoulder of the rotating shaft (1). There is a gap between the rotating shaft (1) and the inner circular surfaces of the electromagnet assembly I and the electromagnet assembly II. Magnetic liquid is injected into the gap to form magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21).

[0011] The left magnetic sleeve (6) is located between the left bearing (4) and the electromagnet assembly I. The left magnetic sleeve (6) has a boss on its left side to provide axial positioning for the outer ring of the left bearing (4). The Peltier I (27) is evenly distributed on the right side of the left magnetic sleeve (6), and there are several of them. The cooling surface faces the gap between the left magnetic sleeve (6) and the electromagnet assembly I, and the heat dissipation surface faces the left magnetic sleeve (6).

[0012] The outer magnetic sleeve (15) is located between the electromagnet assembly II and the right bearing (17). The outer magnetic sleeve (15) has a boss on its right side to provide axial positioning for the outer ring of the right bearing (17). The Peltier III (20) is evenly distributed on the left side of the outer magnetic sleeve (15). There are several of them. The cooling surface punches the gap between the outer magnetic sleeve (15) and the electromagnet assembly II, and the heat dissipation surface punches the outer magnetic sleeve (15). The inner magnetic sleeve (16) has an inverted T-shaped structure and is located between the annular shoulder of the rotating shaft (1) and the right bearing (17). The outer magnetic sleeve (15) and the inner magnetic sleeve (16) are fitted together to form a small labyrinth seal.

[0013] The outer surface of the rotating shaft (1) is provided with three annular grooves, into which snap rings I (3), II (5), and III (19) are respectively placed. Snap rings I (3) and II (5) provide axial positioning for the inner ring of the left bearing (4), and the inner magnetic sleeve (16) and III (19) provide axial positioning for the inner ring of the right bearing (17).

[0014] Compared with ordinary magnetic liquid sealing devices, the present invention has the following advantages: In special situations involving nuclear radiation, the anti-radiation bushing (24) provides radiation protection for the permanent magnet (11), an important component of the magnetic liquid sealing device; when the local temperature of the magnetic liquid sealing device rises due to radiation, Peltier II (23) is used to cool the permanent magnet (11) to ensure its magnetization performance, and Peltier I (27) and Peltier III (20) are used to cool the electromagnet assembly I and electromagnet assembly II to ensure their stable operation; during normal operation, the magnetic fields of electromagnet assembly I and electromagnet assembly II are relatively strong, attracting the magnetic liquid in magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21), and when the magnetic field at the pole teeth is strong, the magnetic liquid is generated. After the performance of the magnetic liquid (10) is damaged by radiation, the magnetic fields of electromagnet assembly I and electromagnet assembly II are reduced. At this time, the magnetic field of permanent magnet (11) is stronger. The magnetic field gradient is used to attract the magnetic liquid in magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21) to the lower pole teeth of left pole shoe (9) and right pole shoe (12) for replenishment. The frustum part of right pole shoe (12) makes the pole teeth and magnetic liquid storage chamber II (21) have a certain height difference, which makes it easier to replenish the magnetic liquid (10). The outer magnetic sleeve (15) and the inner magnetic sleeve (16) are installed together to form a small labyrinth seal, which strengthens the overall sealing effect. Finally, the sealing performance of the magnetic liquid sealing device is guaranteed and its reliability is improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an anti-radiation magnetic liquid sealing device with magnetic liquid storage and replenishment functions according to an embodiment of the present invention.

[0016] Figure 1 In the middle: rotating shaft (1), outer shell (2), snap ring I (3), left bearing (4), snap ring II (5), left magnetic shielding sleeve (6), stator core I (7), winding coil I (8), left pole shoe (9), magnetic fluid (10), permanent magnet (11), right pole shoe (12), stator core II (13), winding coil II (14), outer magnetic shielding sleeve (15), inner magnetic shielding sleeve (16), right bearing (17), end cover (18), snap ring III (19), Peltier III (20), magnetic fluid storage chamber II (21), right sealing ring (22), Peltier II (23), anti-radiation bushing (24), left sealing ring (25), magnetic fluid storage chamber I (26), Peltier I (27).

[0017] Figure 2 This is a cross-sectional view of section AA of an embodiment of the present invention.

[0018] Figure 3 This is a BB cross-sectional view of an embodiment of the present invention. Detailed Implementation

[0019] The following detailed description of one embodiment of the present invention is for illustrative purposes only and should not be construed as limiting the invention in any way. The invention will be further described with reference to the accompanying drawings:

[0020] A radiation-resistant magnetic liquid sealing device with magnetic liquid storage and replenishment functions comprises: a rotating shaft (1), a housing (2), a snap ring I (3), a left bearing (4), a snap ring II (5), a left magnetic shielding sleeve (6), a stator core I (7), a winding coil I (8), a left pole shoe (9), a magnetic liquid (10), a permanent magnet (11), a right pole shoe (12), a stator core II (13), a winding coil II (14), an outer magnetic shielding sleeve (15), an inner magnetic shielding sleeve (16), a right bearing (17), an end cap (18), a snap ring III (19), a Peltier III (20), a magnetic liquid storage chamber II (21), a right sealing ring (22), a Peltier II (23), a radiation-resistant bushing (24), a left sealing ring (25), a magnetic liquid storage chamber I (26), and a Peltier I (27).

[0021] The connection between the various parts of the device is as follows: several Peltier I (27), Peltier II (23), and Peltier III (20) are evenly provided on the right side of the left magnetic shielding sleeve (6), the outer side of the permanent magnet (11), and the left side of the outer magnetic shielding sleeve (15), forming a left magnetic shielding sleeve (6) with Peltier I (27), a permanent magnet (11) with Peltier II (23), and an outer magnetic shielding sleeve (15) with Peltier III (20); the winding coil I (8) is wound on the stator core I (7) to form electromagnet assembly I, and the winding coil II (14) is wound on the stator core II (13) to form electromagnet assembly II; the outer circular surfaces of the left pole shoe (9) and the right pole shoe (12) are provided with annular grooves, and the left sealing ring (25) and the right sealing ring (22) are respectively installed. Installed in the corresponding grooves, forming a left pole shoe (9) with a left sealing ring (25) and a right pole shoe (12) with a right sealing ring (22); the snap ring I (3), left bearing (4), snap ring II (5), left magnetic sleeve (6) with Peltier I (27), electromagnet assembly I, left pole shoe (9) with a left sealing ring (25), permanent magnet (11) with Peltier II (23), anti-radiation bushing (24), right pole shoe (12) with a right sealing ring (22), electromagnet assembly II, outer magnetic sleeve (15) with Peltier III (20), inner magnetic sleeve (16), right bearing (17), snap ring III (19) are installed on the rotating shaft (1) from left to right, and then installed into the outer shell (2); the end cap (18) is connected to the outer shell (2) by screws.

[0022] The anti-radiation bushing (24) is made of anti-radiation materials such as lead, steel, and graphite. The width of the anti-radiation bushing (24) is the same as the width of the permanent magnet (11), and it is located between the left pole shoe (9) and the right pole shoe (12), providing radiation protection for the permanent magnet (11), an important component of the magnetic liquid sealing device.

[0023] Limiting bosses are provided on the right side of the left pole shoe (9) and the left side of the right pole shoe (12) to provide axial and radial positioning for the permanent magnet (11). The permanent magnet (11) is located between the left pole shoe (9) and the right pole shoe (12). The permanent magnet (11) is made of a material with good radiation resistance and high temperature resistance, such as samarium cobalt permanent magnet. The permanent magnet (11) is an axially magnetized permanent magnet with a polygonal cross-section with a central circular hole. The longest diagonal length of the cross-section of the permanent magnet (11) is less than that of the radiation-resistant bushing (24). The inner diameter of the permanent magnet (11) is the same as the outer diameter of the limiting boss on the right side of the left pole shoe (9) and the left side of the right pole shoe (12); the Peltier II (23) is evenly distributed on the outer side of the permanent magnet (11), and there are several of them. The cooling surface punches the permanent magnet (11), and the heat dissipation surface punches the gap between the permanent magnet (11) and the anti-radiation bushing (24). When the magnetic liquid sealing device causes the local temperature to rise due to radiation, the Peltier II (23) is used to cool the permanent magnet (11) to ensure its magnetization performance.

[0024] The left pole shoe (9) is annular, and the right pole shoe (12) is designed as partly annular and partly frustum, with the frustum portion accounting for 0% to 100%, the smaller bottom surface of the frustum facing to the right, and the angle between the generatrix of the frustum and the horizontal direction ranging from 0° to 90°; the rotating shaft (1) is designed with a frustum-shaped shoulder at the corresponding position of the frustum portion of the right pole shoe (12), the larger bottom surface of the frustum facing to the right, and the generatrix of the frustum portion of the rotating shaft (1) is parallel to that of the frustum portion of the right pole shoe (12); the rotating shaft (1) is provided with several pole teeth at the corresponding positions of the left pole shoe (9) and the right pole shoe (12), preferably, the number of left pole teeth and right pole teeth is 1 to 20; there is a gap between the pole teeth on the rotating shaft (1) and the inner circular surface of the left pole shoe (9) and the right pole shoe (12), and magnetic liquid (10) is injected into the gap, the gap value range is 0.1 to 0.2 mm, forming a magnetic liquid seal;

[0025] The rotating shaft (1) has an annular shoulder at the corresponding position of the electromagnet assembly II. The outer diameter of the annular shoulder is the same as the larger bottom diameter of the frustum-shaped shoulder of the rotating shaft (1). There is a gap between the rotating shaft (1) and the inner circular surfaces of the electromagnet assembly I and the electromagnet assembly II. Magnetic liquid is injected into the gap to form magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21).

[0026] During normal operation, the magnetic fields of electromagnet assembly I and electromagnet assembly II are strong, attracting magnetic liquid in magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21). When the performance of magnetic liquid (10) at the pole teeth is damaged by radiation, the magnetic fields of electromagnet assembly I and electromagnet assembly II are reduced. At this time, the magnetic field of permanent magnet (11) is strong, and the magnetic liquid in magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21) is attracted to the lower pole teeth of left pole shoe (9) and right pole shoe (12) for replenishment by using the magnetic field gradient. The frustum part of right pole shoe (12) makes the pole teeth and magnetic liquid storage chamber II (21) have a certain height difference, which makes it easier to replenish magnetic liquid (10).

[0027] The left magnetic sleeve (6) is located between the left bearing (4) and the electromagnet assembly I. The left magnetic sleeve (6) has a boss on its left side to provide axial positioning for the outer ring of the left bearing (4). The Peltier I (27) is evenly distributed on the right side of the left magnetic sleeve (6), and there are several of them. The cooling surface faces the gap between the left magnetic sleeve (6) and the electromagnet assembly I, and the heat dissipation surface faces the left magnetic sleeve (6). The Peltier I (27) is used to cool down the electromagnet assembly I and ensure its stable operation.

[0028] The outer magnetic sleeve (15) is located between the electromagnet assembly II and the right bearing (17). The outer magnetic sleeve (15) has a boss on its right side to provide axial positioning for the outer ring of the right bearing (17). The Peltier III (20) is evenly distributed on the left side of the outer magnetic sleeve (15). There are several of them. The cooling surface faces the gap between the outer magnetic sleeve (15) and the electromagnet assembly II, and the heat dissipation surface faces the outer magnetic sleeve (15). The Peltier III (20) is used to cool down the electromagnet assembly II and ensure its stable operation. The inner magnetic sleeve (16) has an inverted T-shaped structure and is located between the annular shoulder of the rotating shaft (1) and the right bearing (17). The outer magnetic sleeve (15) and the inner magnetic sleeve (16) are installed together to form a small labyrinth seal to enhance the sealing effect.

[0029] The outer surface of the rotating shaft (1) is provided with three annular grooves, into which snap rings I (3), II (5), and III (19) are respectively placed. Snap rings I (3) and II (5) provide axial positioning for the inner ring of the left bearing (4), and the inner magnetic sleeve (16) and III (19) provide axial positioning for the inner ring of the right bearing (17).

[0030] The rotating shaft (1), left pole shoe (9), and right pole shoe (12) are made of magnetically conductive materials with good radiation resistance, such as cobalt steel.

[0031] The outer shell (2) is made of non-magnetic radiation-resistant materials, such as lead and steel;

[0032] The magnetic fluid (10) is selected as a radiation-resistant magnetic fluid.

Claims

1. A radiation-resistant magnetic liquid sealing device with magnetic liquid storage and replenishment functions, characterized in that, The device includes: a rotating shaft (1), a housing (2), a snap ring I (3), a left bearing (4), a snap ring II (5), a left magnetic shielding sleeve (6), a stator core I (7), a winding coil I (8), a left pole shoe (9), a magnetic fluid (10), a permanent magnet (11), a right pole shoe (12), a stator core II (13), a winding coil II (14), an outer magnetic shielding sleeve (15), an inner magnetic shielding sleeve (16), a right bearing (17), an end cap (18), a snap ring III (19), a Peltier III (20), a magnetic fluid storage chamber II (21), a right sealing ring (22), a Peltier II (23), a radiation-resistant bushing (24), a left sealing ring (25), a magnetic fluid storage chamber I (26), and a Peltier I (27). The connection between the various parts of the device is as follows: several Peltier I (27), Peltier II (23), and Peltier III (20) are evenly provided on the right side of the left magnetic shielding sleeve (6), the outer side of the permanent magnet (11), and the left side of the outer magnetic shielding sleeve (15), forming a left magnetic shielding sleeve (6) with Peltier I (27), a permanent magnet (11) with Peltier II (23), and an outer magnetic shielding sleeve (15) with Peltier III (20); the winding coil I (8) is wound on the stator core I (7) to form an electromagnet assembly I, and the winding coil II (14) is wound on the stator core II (13) to form an electromagnet assembly II; the outer circular surfaces of the left pole shoe (9) and the right pole shoe (12) are provided with annular grooves, and the left sealing ring (25) and the right sealing ring (22) are respectively installed in the corresponding grooves to form a left pole with a left sealing ring (25). Boot (9), right pole boot (12) with right sealing ring (22); the anti-radiation bushing (24) is located between the left pole boot (9) and the right pole boot (12) to provide radiation protection for the permanent magnet (11); the snap ring I (3), left bearing (4), snap ring II (5), left magnetic sleeve (6) with Peltier I (27), electromagnet assembly I, left pole boot (9) with left sealing ring (25), permanent magnet (11) with Peltier II (23), anti-radiation bushing (24), right pole boot (12) with right sealing ring (22), electromagnet assembly II, outer magnetic sleeve (15) with Peltier III (20), inner magnetic sleeve (16), right bearing (17), snap ring III (19) are installed on the rotating shaft (1) from left to right, and then installed in the outer shell (2); the end cap (18) is connected to the outer shell (2) by screws; There is a gap between the rotating shaft (1) and the inner circular surfaces of electromagnet assembly I and electromagnet assembly II. Magnetic liquid is injected into the gap to form magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21). During normal operation, the magnetic fields of electromagnet assembly I and electromagnet assembly II are strong, which adsorbs the magnetic liquid in magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21). When the performance of the magnetic liquid (10) at the pole teeth is damaged by radiation, the magnetic field of electromagnet assembly I and electromagnet assembly II is reduced. At this time, the magnetic field of permanent magnet (11) is strong. The magnetic field gradient is used to adsorb the magnetic liquid in magnetic liquid storage chamber I (26) and magnetic liquid storage chamber II (21) to the lower pole teeth of the left pole shoe (9) and right pole shoe (12) for replenishment.

2. The radiation-resistant magnetic liquid sealing device with magnetic fluid storage and replenishment function according to claim 1, characterized in that: The radiation-resistant bushing (24) is made of radiation-resistant material and has the same width as the permanent magnet (11).

3. The radiation-resistant magnetic liquid sealing device with magnetic fluid storage and replenishment function according to claim 1, characterized in that: Limiting bosses are provided on the right side of the left pole shoe (9) and the left side of the right pole shoe (12). The permanent magnet (11) is located between the left pole shoe (9) and the right pole shoe (12). The permanent magnet (11) is made of a material with good radiation resistance and high temperature resistance. The permanent magnet (11) is an axially magnetized permanent magnet with a polygonal cross-section with a central circular hole. The longest diagonal length of the cross-section of the permanent magnet (11) is less than the inner diameter of the radiation-resistant bushing (24). The diameter of the central through hole of 11) is the same as the outer diameter of the limiting boss on the right side of the left pole shoe (9) and the left side of the right pole shoe (12); the Peltier II (23) is evenly distributed on the outer side of the permanent magnet (11), and there are several of them. The cooling surface is flush with the permanent magnet (11), and the heat dissipation surface is flush with the gap between the permanent magnet (11) and the anti-radiation bushing (24). When the magnetic liquid sealing device causes the local temperature to rise due to radiation, the Peltier II (23) is used to cool down the permanent magnet (11) to ensure its magnetization performance.

4. The radiation-resistant magnetic liquid sealing device with magnetic fluid storage and replenishment function according to claim 1, characterized in that: The left pole shoe (9) is annular, and the right pole shoe (12) is designed as partly annular and partly frustum, with the frustum portion accounting for 0%~100%, the smaller bottom surface of the frustum facing the right, and the angle between the generatrix of the frustum and the horizontal direction ranging from 0° to 90°; the rotating shaft (1) is designed with a frustum-shaped shoulder at the corresponding position of the frustum portion of the right pole shoe (12), the larger bottom surface of the frustum facing the right, and the generatrix of the frustum portion of the rotating shaft (1) is parallel to that of the frustum portion of the right pole shoe (12); the rotating shaft (1) is provided with several pole teeth at the corresponding positions of the left pole shoe (9) and the right pole shoe (12); there is a gap between the pole teeth on the rotating shaft (1) and the inner circular surface of the left pole shoe (9) and the right pole shoe (12), and magnetic liquid (10) is injected into the gap to form a magnetic liquid seal.

5. The radiation-resistant magnetic liquid sealing device with magnetic fluid storage and replenishment function according to claim 4, characterized in that: The rotating shaft (1) has an annular shoulder at the corresponding position of the electromagnet assembly II. The outer diameter of the annular shoulder is the same as the larger bottom diameter of the frustum-shaped shoulder of the rotating shaft (1). The frustum portion of the right pole shoe (12) creates a certain height difference between the pole teeth and the magnetic liquid storage chamber II (21), which makes it easier to replenish the magnetic liquid (10).

6. The radiation-resistant magnetic liquid sealing device with magnetic fluid storage and replenishment function according to claim 1, characterized in that: The left magnetic sleeve (6) is located between the left bearing (4) and the electromagnet assembly I; the Peltier I (27) is evenly distributed on the right side of the left magnetic sleeve (6), and there are several of them. The cooling surface faces the gap between the left magnetic sleeve (6) and the electromagnet assembly I, and the heat dissipation surface faces the left magnetic sleeve (6). The Peltier I (27) is used to cool down the electromagnet assembly I and ensure its stable operation. The outer magnetic sleeve (15) is located between the electromagnet assembly II and the right bearing (17); the Peltier III (20) is evenly distributed on the left side of the outer magnetic sleeve (15), and there are several of them. The cooling surface faces the gap between the outer magnetic sleeve (15) and the electromagnet assembly II, and the heat dissipation surface faces the outer magnetic sleeve (15). The Peltier III (20) is used to cool down the electromagnet assembly II and ensure its stable operation; the inner magnetic sleeve (16) is an inverted T-shaped structure, located between the annular shoulder of the rotating shaft (1) and the right bearing (17). The outer magnetic sleeve (15) and the inner magnetic sleeve (16) are installed together to form a small labyrinth seal.

7. The radiation-resistant magnetic liquid sealing device with magnetic fluid storage and replenishment function according to any one of claims 1, 4, and 5, characterized in that: The rotating shaft (1), left pole shoe (9), and right pole shoe (12) are made of magnetically conductive materials with good radiation resistance. The outer shell (2) is made of a non-magnetic radiation-resistant material; The magnetic liquid (10) is selected as a radiation-resistant magnetic liquid.

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