Micro-nano magnetic medium sealing device for storing and supplementing micro-nano magnetic medium

Abstract

The invention discloses a micro-nano magnetic medium sealing device for storing and supplementing a micro-nano magnetic medium, which comprises a shell, a rotating shaft and a micro-nano magnetic medium sealing assembly, and is characterized in that the micro-nano magnetic medium sealing assembly is arranged in a cavity and comprises a magnetic conductive shaft sleeve, a first pole shoe, a second pole shoe and a first magnet; a storage groove is formed in the outer wall face of the magnetic conduction shaft sleeve, and sealing gaps are formed between the first pole shoe and the magnetic conduction shaft sleeve and between the second pole shoe and the magnetic conduction shaft sleeve. According to the micro-nano magnetic medium sealing device for storing and supplementing the micro-nano magnetic medium, the storage groove is formed in the outer wall face of the magnetic conduction shaft sleeve to pre-store the micro-nano magnetic medium, so that when the rotating shaft rotates at a high speed, the pre-stored micro-nano magnetic medium is supplemented into a sealing gap in time under the action of centrifugal force; therefore, the requirement for the large amount of micro-nano magnetic media needed when the rotating shaft rotates at a high speed is met, the pressure resistance of sealing is ensured, and the reliability and stability of a sealing system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-nano magnetic medium sealing, and in particular to a micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium. Background Art

[0002] In the micro-nano magnetic medium sealing technology, the micro-nano magnetic medium forms an "O" ring under the action of an uneven magnetic field to achieve sealing of the medium. It has significant advantages such as zero leakage, long life and low friction, and therefore plays an irreplaceable role in high-end equipment such as aerospace and nuclear energy. However, under high speed conditions, the centrifugal force on the micro-nano magnetic medium increases, making it easy to leave the sealing position, resulting in sealing failure.

[0003] In the related art, micro-nano magnetic media can achieve effective sealing effects at low speeds, but at high speeds, the characteristics of centrifugal sealing are needed to maintain sealing performance. However, the amount of micro-nano magnetic media required for sealing is small, while centrifugal sealing requires more to ensure the pressure resistance of the seal. In order to solve this technical problem, it is necessary to store micro-nano magnetic media so as to provide enough micro-nano magnetic media for centrifugal sealing at high speeds to ensure the reliability and stability of the sealing system. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic media.

[0006] The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to the embodiment of the present invention comprises a housing, a rotating shaft and a micro-nano magnetic medium sealing assembly, wherein the housing defines a chamber; at least a portion of the rotating shaft is rotatably disposed in the chamber;

[0007] The micro-nano magnetic medium sealing assembly is arranged in the chamber and comprises a magnetic sleeve, a first pole shoe, a second pole shoe and a first magnet. The magnetic sleeve is sleeved on the rotating shaft. A storage groove for storing micro-nano magnetic medium is provided on the outer wall of the magnetic sleeve. The magnetic sleeve has a first end face and a second end face opposite to each other along its axial direction.

[0008] Each of the first pole shoe and the second pole shoe is sleeved on the rotating shaft and connected to the housing, the first pole shoe and the second pole shoe are spaced apart on both sides of the magnetic conductive sleeve, and a sealing gap is provided between the first pole shoe and the first end face, and between the second pole shoe and the second end face, and the sealing gap is used to fill a micro-nano magnetic medium;

[0009] The first magnet is arranged between the first pole shoe and the second pole shoe and is located outside the magnetic conductive sleeve, and the first magnet is spaced apart from the magnetic conductive sleeve.

[0010] In some embodiments, there are multiple storage slots, and at least a portion of the storage slots are arranged at intervals along the circumference of the magnetic conductive sleeve.

[0011] In some embodiments, the plurality of storage slots are divided into a plurality of slot groups, the plurality of slot groups are arranged at intervals along the axial direction of the magnetic conductive sleeve, and the slot groups include a plurality of storage slots arranged at intervals along the circumferential direction of the magnetic conductive sleeve.

[0012] In some embodiments, the side wall of the storage tank has a plurality of protrusions arranged at intervals, and the protrusions are hemispherical.

[0013] In some embodiments, the storage groove extends along the radial direction of the magnetic conductive sleeve, the storage groove has a taper, and the cross-sectional area of ​​the storage groove gradually decreases in the direction from the magnetic conductive sleeve to the rotating shaft.

[0014] In some embodiments, an adsorption member is disposed in the storage tank, and the adsorption member has a plurality of adsorption holes, and the adsorption holes are used to adsorb the micro-nano magnetic medium.

[0015] In some embodiments, a storage groove is opened on the inner wall surface of the magnetic sleeve, and a second magnet is provided in the storage groove. The second magnet is used to magnetically attract the micro-nano magnetic medium stored in the storage groove. When the rotation speed of the rotating shaft is higher than a preset value, the centrifugal force of the micro-nano magnetic medium stored in the storage groove is greater than the magnetic attraction between the second magnet.

[0016] In some embodiments, in the radial direction of the magnetically conductive sleeve, a projection of the storage slot at least partially overlaps with a projection of the storage slot.

[0017] In some embodiments, a plurality of first pole teeth arranged at intervals along the radial direction of the magnetic sleeve are provided on the first end face, and a sealing gap is defined between the first pole teeth and the first pole shoe; a plurality of second pole teeth arranged at intervals along the radial direction of the magnetic sleeve are provided on the second end face, and a sealing gap is defined between the second pole teeth and the second pole shoe.

[0018] In some embodiments, a first sealing groove is provided on the inner circumferential surface of the magnetic conductive sleeve, and a first sealing ring is provided between the first sealing groove and the rotating shaft; and / or

[0019] A second sealing groove is provided on the outer wall surface of the first pole shoe, and a second sealing ring is provided between the second sealing groove and the housing; and / or

[0020] A third sealing groove is formed on the outer wall surface of the second pole shoe, and a third sealing ring is provided between the third sealing groove and the housing.

[0021] In the micro-nano magnetic medium sealing device for micro-nano magnetic medium storage and replenishment according to the embodiment of the present invention, a storage groove is formed on the outer wall surface of the magnetic conductive bushing to pre-store the micro-nano magnetic medium. So that when the rotating shaft rotates at a high speed, the pre-stored micro-nano magnetic medium can be timely replenished into the sealing gap under the action of centrifugal force to meet the required large amount of micro-nano magnetic medium under the high-speed rotation of the rotating shaft, ensure the pressure resistance of the seal, and improve the reliability and stability of the sealing system. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the micro-nano magnetic medium sealing device according to the embodiment of the present invention

[0023] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0024] Figure 3 is a front view of the magnetic conductive bushing according to the embodiment of the present invention.

[0025] Figure 4 is a schematic diagram of the magnetic conductive bushing according to an embodiment of the present invention.

[0026] Figure 5 is a schematic diagram of the magnetic conductive bushing according to another embodiment of the present invention.

[0027] Figure 6 is a schematic diagram of the magnetic conductive bushing according to still another embodiment of the present invention.

[0028] Figure 7 is a schematic diagram of the magnetic conductive bushing according to another embodiment of the present invention.

[0029] Reference Numerals:

[0030] 100, micro-nano magnetic medium sealing device; 1, housing; 101, chamber; 2, rotating shaft; 3, micro-nano magnetic medium sealing assembly; 301, magnetic conductive bushing; 3011, storage groove; 3012, first end face; 3013, second end face; 3014, storage slot; 3015, first sealing groove; 302, first pole shoe; 3021, second sealing groove; 303, second pole shoe; 3031, third sealing groove; 304, first magnet; 4, protrusion; 5, adsorbing member; 6, second magnet; 7, first pole tooth; 8, second pole tooth; 9, first sealing ring; 10, second sealing ring; 11, third sealing ring. Detailed Embodiments

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figures 1 to 7 As shown, the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic medium according to an embodiment of the present invention comprises a shell 1, a rotating shaft 2 and a micro-nano magnetic medium sealing assembly 3. The shell 1 defines a chamber 101, and at least a portion of the rotating shaft 2 is rotatably disposed in the chamber 101.

[0033] The micro-nano magnetic medium sealing assembly 3 is arranged in the chamber 101 and includes a magnetic sleeve 301, a first pole shoe 302, a second pole shoe 303 and a first magnet 304. The magnetic sleeve 301 is sleeved on the rotating shaft 2, and a storage groove 3011 for storing micro-nano magnetic medium is provided on the outer wall surface of the magnetic sleeve 301. The magnetic sleeve 301 has a first end face 3012 and a second end face 3013 opposite to each other along its axial direction.

[0034] Each of the first pole shoe 302 and the second pole shoe 303 is sleeved on the rotating shaft 2 and connected to the housing 1. The first pole shoe 302 and the second pole shoe 303 are spaced apart on both sides of the magnetic sleeve 301. There is a sealed gap between the first pole shoe 302 and the first end face 3012 and between the second pole shoe 303 and the second end face 3013. The sealed gap is used to fill the micro-nano magnetic medium. The first magnet 304 is disposed between the first pole shoe 302 and the second pole shoe 303 and is located on the outside of the magnetic sleeve 301. The first magnet 304 is spaced apart from the magnetic sleeve 301.

[0035] When the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic medium of the embodiment of the present invention is in use, a magnetic circuit is formed between the magnetic sleeve 301, the first pole shoe 302, the second pole shoe 303 and the first magnet 304, so that the micro-nano magnetic medium is adsorbed in the sealing gap under the action of the magnetic field, and the sealing effect of the rotating shaft 2 during the rotation process is realized. When the rotating shaft 2 is running at a low speed, at this time, due to the small centrifugal force, the micro-nano magnetic medium stored in the storage tank 3011 will not be lost. When the rotation speed of the rotating shaft 2 increases to a certain extent and exceeds the preset value, the micro-nano magnetic medium in the storage tank 3011 flows out of the storage tank 3011 under the action of centrifugal force. The micro-nano magnetic medium that flows out fills the sealing gap between the first pole shoe 302 and the first end face 3012 and between the second pole shoe 303 and the second end face 3013, so as to increase the amount of micro-nano magnetic medium in the sealing gap, so as to meet the demand of micro-nano magnetic medium under the high-speed operation of the rotating shaft 2, form an effective seal, and prevent medium leakage.

[0036] Therefore, the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic medium of the embodiment of the present invention pre-stores micro-nano magnetic medium by opening a storage groove 3011 on the outer wall surface of the magnetic sleeve 301, so that when the rotating shaft 2 is at a high speed, the pre-stored micro-nano magnetic medium can be replenished into the sealing gap in time through the action of centrifugal force to meet the large amount of micro-nano magnetic medium required for the high-speed rotation of the rotating shaft 2, ensure the pressure resistance of the seal, and improve the reliability and stability of the sealing system.

[0037] In some embodiments, there are multiple storage slots 3011 , and at least a portion of the storage slots 3011 are arranged at intervals along the circumference of the magnetic conductive sleeve 301 .

[0038] For example, Figure 3 As shown, at least a portion of the storage slots 3011 are arranged at intervals along the circumference of the magnetic sleeve 301. Such a design can make the micro-nano magnetic medium evenly distributed around the magnetic sleeve 301, so that when the shaft 2 runs at high speed, the micro-nano magnetic medium can be evenly thrown into the sealing gap, thereby improving the uniformity and effectiveness of the seal. The design of multiple storage slots 3011 also increases the area in contact with the micro-nano magnetic medium, so that more micro-nano magnetic medium can be stored and used, thereby enhancing the sealing effect.

[0039] In some embodiments, the plurality of storage slots 3011 are divided into a plurality of slot groups, and the plurality of slot groups are arranged at intervals along the axial direction of the magnetic conductive sleeve 301 . The slot groups include a plurality of storage slots 3011 arranged at intervals along the circumferential direction of the magnetic conductive sleeve 301 .

[0040] like Figure 3 and Figure 5 As shown, the slot groups are arranged at intervals along the axial direction of the magnetic sleeve 301, which can ensure that the micro-nano magnetic medium can be evenly distributed throughout the entire length of the shaft 2, so that the sealing effect at all locations can be guaranteed when the shaft 2 rotates at high speed. Each slot group includes a plurality of storage slots 3011 arranged at intervals along the circumference of the magnetic sleeve 301. This design helps to use centrifugal force to allow the micro-nano magnetic medium to flow evenly and quickly into the sealing gap when the shaft 2 rotates at high speed.

[0041] The combination of axial and circumferential spacing makes the distribution of the micro-nano magnetic medium in the sealing gap more uniform, effectively avoiding the sealing defects caused by the uneven distribution of the micro-nano magnetic medium. The design of multiple slot groups enables the micro-nano magnetic medium to quickly respond to the change in the rotation speed of the shaft 2, quickly replenish the sealing gap, and maintain a good sealing state.

[0042] In some embodiments, the side wall of the storage tank 3011 has a plurality of spaced-apart protrusions 4 , and the protrusions 4 are hemispherical.

[0043] like Figure 4 As shown, the spaced arrangement of the protrusions 4 helps to break the dead zone of the flow, reduce the eddy currents caused by the rotation, and improve the flow efficiency and sealing performance of the micro-nano magnetic medium. The design of the protrusions 4 helps to form a certain micro-nano magnetic medium flow pattern in the storage tank 3011, so that the distribution of the micro-nano magnetic medium under the centrifugal action is more uniform.

[0044] In some embodiments, the storage groove 3011 extends in the radial direction of the magnetic conductive sleeve 301 , the storage groove 3011 has a taper, and the cross-sectional area of ​​the storage groove 3011 gradually decreases in the direction from the magnetic conductive sleeve 301 to the rotating shaft 2 .

[0045] Due to the tapered shape, the centrifugal force on the micro-nano magnetic medium in the storage tank 3011 increases with the increase of the radius, which helps the micro-nano magnetic medium to be more effectively thrown out of the storage tank 3011 when rotating at a high speed. The design of the tapered storage tank 3011 helps the micro-nano magnetic medium to flow in the storage tank 3011, reduces the flow resistance, and improves the fluidity of the micro-nano magnetic medium.

[0046] In some other embodiments, an adsorption member 5 is disposed in the storage tank 3011 , and the adsorption member 5 has a plurality of adsorption holes, and the adsorption holes are used to adsorb the micro-nano magnetic medium.

[0047] The presence of the adsorption holes on the adsorption member 5 can increase the contact area between the micro-nano magnetic medium and the adsorption member 5, thereby improving the adsorption efficiency and ensuring that more micro-nano magnetic medium can be stored in the storage tank 3011. The adsorption member 5 can ensure that the micro-nano magnetic medium is evenly distributed in the storage tank 3011, avoid local overload or cavity phenomenon, and improve the utilization rate and sealing effect of the micro-nano magnetic medium. When the shaft 2 rotates at a low speed, the adsorption member 5 can effectively adsorb the micro-nano magnetic medium and reduce the loss of the micro-nano magnetic medium caused by centrifugal force. When the shaft 2 rotates at a high speed, the adsorption member 5 can throw out the adsorbed micro-nano magnetic medium in time, and replenish the micro-nano magnetic medium in the sealing gap in time, which is conducive to improving the storage reliability of the micro-nano magnetic medium in the storage tank 3011.

[0048] In some embodiments, a storage slot 3014 is provided on the inner wall surface of the magnetic sleeve 301, and a second magnet 6 is provided in the storage slot 3014. The second magnet 6 is used to magnetically attract the micro-nano magnetic medium stored in the storage slot 3011. When the rotation speed of the rotating shaft 2 is higher than a preset value, the centrifugal force of the micro-nano magnetic medium stored in the storage slot 3011 is greater than the magnetic attraction between the second magnet 6.

[0049] The storage slot 3014 is provided on the inner wall surface of the magnetic sleeve 301, providing a fixed position for the second magnet 6, and also providing a storage space for the micro-nano magnetic medium. The second magnet 6 is located in the storage slot 3014, and is used to magnetically absorb the micro-nano magnetic medium stored in the storage slot 3011. When the rotating speed of the rotating shaft 2 is low, the magnetic attraction of the second magnet 6 can keep the micro-nano magnetic medium in the storage slot 3011, preventing it from leaking due to gravity or small vibrations, which is beneficial to improving the working reliability. When the rotating speed of the rotating shaft 2 is high, the micro-nano magnetic medium can get rid of the magnetic attraction between the second magnet 6 and be thrown out in time, and the micro-nano magnetic medium in the sealing gap can be replenished in time, which is beneficial to improving the storage reliability of the micro-nano magnetic medium in the storage slot 3011.

[0050] In some embodiments, in the radial direction of the magnetic sleeve 301 , the projection of the storage slot 3011 at least partially overlaps with the projection of the storage slot 3014 .

[0051] The projection of the storage slot 3011 overlaps at least partially with the projection of the storage slot 3014, so that the second magnet 6 stored in the storage slot 3014 can provide better magnetic attraction for the micro-nano magnetic medium stored in the storage slot 3011, so that the micro-nano magnetic medium can adapt to the change in speed. At low speed, the magnetic attraction of the second magnet 6 can keep the micro-nano magnetic medium in the storage slot 3011; at high speed, the centrifugal force overcomes the magnetic attraction, and the micro-nano magnetic medium is thrown out, meeting the sealing requirements.

[0052] Alternatively, if Figures 4 to 7 As shown, a plurality of first pole teeth 7 arranged at intervals along the radial direction of the magnetic sleeve 301 are provided on the first end face 3012, and a sealing gap is defined between the first pole teeth 7 and the first pole shoe 302. A plurality of second pole teeth 8 arranged at intervals along the radial direction of the magnetic sleeve 301 are provided on the second end face 3013, and a sealing gap is defined between the second pole teeth 8 and the second pole shoe 303.

[0053] In some embodiments, a first sealing groove 3015 is formed on the inner circumference of the magnetic sleeve 301 , and a first sealing ring 9 is provided between the first sealing groove 3015 and the rotating shaft 2 .

[0054] like Figure 2 As shown, the first sealing ring 9 is installed in the first sealing groove 3015, located between the magnetic sleeve 301 and the rotating shaft 2, and is used to provide sealing for the magnetic sleeve 301 and the rotating shaft 2, which is beneficial to further improve the sealing effect of the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic media according to the embodiment of the present invention.

[0055] In some embodiments, a second sealing groove 3021 is formed on the outer wall surface of the first pole shoe 302 , and a second sealing ring 10 is provided between the second sealing groove 3021 and the housing 1 .

[0056] like Figure 2 As shown, the second sealing ring 10 is installed in the second sealing groove 3021, located between the first pole shoe 302 and the shell 1, and is used to provide sealing for the first pole shoe 302 and the shell 1, which is beneficial to further improve the sealing effect of the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic media according to the embodiment of the present invention.

[0057] In some embodiments, a third sealing groove 3031 is formed on the outer wall surface of the second pole shoe 303 , and a third sealing ring 11 is provided between the third sealing groove 3031 and the housing 1 .

[0058] like Figure 2 As shown, the third sealing ring 11 is installed in the third sealing groove 3031, located between the second pole shoe 303 and the shell 1, and is used to provide sealing for the second pole shoe 303 and the shell 1, which is beneficial to further improve the sealing effect of the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic media according to the embodiment of the present invention.

[0059] Optionally, the micro-nano magnetic medium sealing assembly 3 in the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic medium according to the embodiment of the present invention is multi-stage, for example, Figure 1 As shown, the micro-nano magnetic medium sealing assembly 3 is two-stage, and the multi-stage micro-nano magnetic medium sealing assembly 3 is arranged at intervals along the axial direction of the rotating shaft 2.

[0060] A shaft sleeve is provided between two magnetic conductive sleeves 301 in two adjacent micro-nano magnetic medium sealing components 3, and the shaft sleeve is sleeved on the shaft 2 and the two ends thereof are respectively stopped on the two adjacent magnetic conductive sleeves 301. A housing sleeve is provided between two pole shoes in two adjacent micro-nano magnetic medium sealing components 3, and the housing sleeve is sleeved on the shaft 2 and the two ends thereof are respectively stopped on the two adjacent pole shoes, and the outer wall of the housing sleeve is connected to the housing 1.

[0061] Optionally, an elastic retaining ring is provided on the rotating shaft 2 , and the elastic retaining ring is used to stop the magnetic conductive sleeve 301 .

[0062] Optionally, an end cover and an adjusting gasket are provided at one end of the shell 1. The end cover is threadedly connected to the shell 1. The end cover stops on the pole shoe of the micro-nano magnetic medium sealing assembly 3 to seal the shell 1. The adjusting gasket is provided between the end cover and the shell 1 to adjust the gap between the end cover and the shell 1.

[0063] Specifically, Figure 1As shown, when installing the micro-nano magnetic medium sealing device 100 for storing and replenishing micro-nano magnetic media according to the embodiment of the present invention, first install the second sealing ring 10 in the first sealing groove 3015 of the first pole shoe 302 and put it into the housing 1; secondly, install the first sealing ring 9 in the first sealing groove 3015 of the magnetic sleeve 301, and install the magnetic sleeve 301 on the rotating shaft 2; install the first magnet 304 again, install the third sealing ring 11 in the third sealing groove 3031 of the second pole shoe 303, and put it into the housing 1; then fill the micro-nano magnetic medium 13 in the sealing gap and the storage groove 3011, and then install the remaining stages of micro-nano magnetic medium sealing components 3 in sequence, and finally install the elastic retaining ring on the rotating shaft 2 to stop the magnetic sleeve 301, and screw the end cover to fix the pole shoe.

[0064] Optionally, the first pole shoe 302, the second pole shoe 303 and the magnetic sleeve 301 can be made of materials with good magnetic conductivity, such as 2Cr13, electrical pure iron, etc. The first magnet 304 and the second magnet 6 can be made of neodymium iron boron, etc. The housing 1 can be made of non-magnetic materials, such as 316L stainless steel, etc. The type of micro-nano magnetic medium is selected according to the use environment and the sealing medium. The micro-nano magnetic medium with different base carrier liquids is not specifically limited here.

[0065] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium, characterized in that: include: a housing defining a chamber; a rotating shaft, at least a portion of which is rotatably disposed in the chamber; A micro-nano magnetic medium sealing component, which is arranged in the chamber and includes a magnetic sleeve, a first pole shoe, a second pole shoe and a first magnet, wherein the magnetic sleeve is sleeved on the rotating shaft, a storage groove for storing micro-nano magnetic medium is provided on the outer wall surface of the magnetic sleeve, and the magnetic sleeve has a first end face and a second end face opposite to each other along its axial direction; Each of the first pole shoe and the second pole shoe is sleeved on the rotating shaft and connected to the housing, the first pole shoe and the second pole shoe are spaced apart on both sides of the magnetic conductive sleeve, and a sealing gap is provided between the first pole shoe and the first end face, and between the second pole shoe and the second end face, and the sealing gap is used to fill a micro-nano magnetic medium; The first magnet is arranged between the first pole shoe and the second pole shoe and is located outside the magnetic conductive sleeve, and the first magnet is spaced apart from the magnetic conductive sleeve.

2. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 1, characterized in that: There are multiple storage slots, and at least a portion of the storage slots are arranged at intervals along the circumference of the magnetic conductive sleeve.

3. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 2, characterized in that: The plurality of storage slots are divided into a plurality of slot groups, and the plurality of slot groups are arranged at intervals along the axial direction of the magnetic conductive sleeve. The slot groups include a plurality of storage slots arranged at intervals along the circumferential direction of the magnetic conductive sleeve.

4. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 1, characterized in that: The side wall of the storage tank is provided with a plurality of convex parts which are arranged at intervals, and the convex parts are hemispherical.

5. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 1, characterized in that: The storage groove extends in a radial direction of the magnetic conductive sleeve, the storage groove has a taper, and the cross-sectional area of ​​the storage groove gradually decreases in a direction from the magnetic conductive sleeve to the rotating shaft.

6. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 1, characterized in that: An adsorption member is arranged in the storage tank, and a plurality of adsorption holes are arranged on the adsorption member, and the adsorption holes are used for adsorbing micro-nano magnetic media.

7. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 1, characterized in that: A storage groove is provided on the inner wall surface of the magnetic sleeve, and a second magnet is provided in the storage groove. The second magnet is used to magnetically attract the micro-nano magnetic medium stored in the storage groove. When the rotation speed of the rotating shaft is higher than a preset value, the centrifugal force of the micro-nano magnetic medium stored in the storage groove is greater than the magnetic attraction between the second magnet.

8. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 7, characterized in that: In the radial direction of the magnetically conductive sleeve, the projection of the storage slot at least partially overlaps with the projection of the storage slot.

9. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 1, characterized in that: The first end surface is provided with a plurality of first pole teeth arranged at intervals along the radial direction of the magnetic conductive sleeve, and a sealing gap is defined between the first pole teeth and the first pole shoe. The second end surface is provided with a plurality of second pole teeth arranged at intervals along the radial direction of the magnetic conductive sleeve, and a sealing gap is defined between the second pole teeth and the second pole shoe.

10. The micro-nano magnetic medium sealing device for storing and replenishing micro-nano magnetic medium according to claim 1, characterized in that: A first sealing groove is provided on the inner circumferential surface of the magnetic conductive sleeve, and a first sealing ring is provided between the first sealing groove and the rotating shaft; and / or A second sealing groove is provided on the outer wall surface of the first pole shoe, and a second sealing ring is provided between the second sealing groove and the housing; and / or A third sealing groove is formed on the outer wall surface of the second pole shoe, and a third sealing ring is provided between the third sealing groove and the housing.

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