Micro-nano magnetic medium storage and supplement micro-nano magnetic medium sealing device

Abstract

The application discloses a kind of micro-nano magnetic medium storage and supplement micro-nano magnetic medium sealing device, including shell, pivot and micro-nano magnetic medium sealing assembly, the micro-nano magnetic medium sealing assembly is located in the cavity and includes magnetic conducting sleeve, first pole shoe, second pole shoe and first magnet, the outer wall surface of the magnetic conducting sleeve is equipped with storage groove, the first pole shoe with the magnetic conducting sleeve between, the second pole shoe with the magnetic conducting sleeve between has sealing gap.The micro-nano magnetic medium storage and supplement micro-nano magnetic medium sealing device of the application prestore micro-nano magnetic medium by opening storage groove on the outer wall surface of magnetic conducting sleeve, so that pivot is under high speed, prestore micro-nano magnetic medium is supplemented in sealing gap in time by the action of centrifugal force, to meet the more micro-nano magnetic quality required under high speed rotation of pivot, ensure the pressure resistance of sealing, improve the reliability and stability of sealing system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro-nano magnetic medium sealing, in particular to a micro-nano magnetic medium sealing device for micro-nano magnetic medium storage and replenishment. BACKGROUND

[0002] In the micro-nano magnetic medium sealing technology, the micro-nano magnetic medium forms an "O" ring under the action of a non-uniform magnetic field, thereby achieving sealing of the medium. This technology has the advantages of zero leakage, long service life, and low friction, and thus plays an irreplaceable role in high-end equipment such as aerospace and nuclear energy. However, under high speed conditions, the centrifugal force acting on the micro-nano magnetic medium increases, which causes the micro-nano magnetic medium to easily separate from the sealing position, thereby leading to sealing failure.

[0003] In the related art, the micro-nano magnetic medium can achieve effective sealing effect at low speed, and the centrifugal sealing characteristic is used to maintain the sealing performance at high speed. However, the micro-nano magnetic medium sealing requires a small amount, while the centrifugal sealing requires a larger amount to ensure the pressure resistance of the sealing. In order to solve this technical problem, it is necessary to store the micro-nano magnetic medium to provide sufficient micro-nano magnetic medium for the centrifugal sealing at high speed, thereby ensuring the reliability and stability of the sealing system. SUMMARY

[0004] The present application aims to at least partially solve one of the technical problems in the related art.

[0005] To this end, an embodiment of the present application provides a micro-nano magnetic medium sealing device for micro-nano magnetic medium storage and replenishment.

[0006] The micro-nano magnetic medium sealing device for micro-nano magnetic medium storage and replenishment according to the embodiment of the present application comprises a housing, a rotating shaft, and a micro-nano magnetic medium sealing assembly, wherein the housing defines a cavity; at least a portion of the rotating shaft is rotatably arranged in the cavity;

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

[0008] Each of the first pole shoe and the second pole shoe is sleeved on the rotating shaft and connected with the housing. The first pole shoe and the second pole shoe are arranged on the two sides of the magnetic conducting sleeve with a sealing gap between the first pole shoe and the first end surface and between the second pole shoe and the second end surface. The sealing gap is used to fill the micro-nano magnetic medium;

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

[0010] In some embodiments, the number of the storage grooves is multiple, and at least part of the storage grooves are arranged along the circumference of the magnetic conducting sleeve.

[0011] In some embodiments, the multiple storage grooves are divided into multiple groove groups, the multiple groove groups are arranged along the axial direction of the magnetic conducting sleeve, and each groove group includes multiple storage grooves arranged along the circumference of the magnetic conducting sleeve.

[0012] In some embodiments, the storage groove has multiple protrusions arranged thereon, and the protrusions are semispherical.

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

[0014] In some embodiments, the storage groove is provided with a suction member, the suction member has multiple suction holes arranged thereon, and the suction holes are used for adsorbing the micro-nano magnetic medium.

[0015] In some embodiments, the inner wall of the magnetic conducting sleeve is provided with a storage groove, the storage groove is provided with a second magnet, the second magnet is used for magnetically attracting the micro-nano magnetic medium stored in the storage groove, and when the rotating 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 force between the micro-nano magnetic medium and the second magnet.

[0016] In some embodiments, in the radial direction of the magnetic conducting sleeve, the projection of the storage groove at least partially overlaps with the projection of the storage groove.

[0017] In some embodiments, the first end surface is provided with multiple first pole teeth arranged along the radial direction of the magnetic conducting sleeve, the first pole teeth and the first pole shoe define a sealing gap therebetween, the second end surface is provided with multiple second pole teeth arranged along the radial direction of the magnetic conducting sleeve, and the second pole teeth and the second pole shoe define a sealing gap therebetween.

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

[0019] the outer wall surface of the first pole shoe is provided with a second sealing groove, and a second sealing ring is arranged between the second sealing groove and the shell; 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 arranged between the third sealing groove and the shell.

[0021] The micro-nano magnetic medium sealing device of the embodiment of the application pre-stores micro-nano magnetic medium in the storage groove formed on the outer wall surface of the magnetic conducting sleeve, so that the pre-stored micro-nano magnetic medium is supplemented into the sealing gap in time by the centrifugal force when the rotating shaft rotates at high speed, to meet the requirement of more micro-nano magnetic medium under high-speed rotation of the rotating shaft, ensure the pressure resistance of the sealing, and improve the reliability and stability of the sealing system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the micro-nano magnetic medium sealing device of the embodiment of the application

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

[0024] Figure 3 is a front view of the magnetic conducting sleeve of the embodiment of the application.

[0025] Figure 4 is a schematic view of the magnetic conducting sleeve of one embodiment of the application.

[0026] Figure 5 is a schematic view of the magnetic conducting sleeve of another embodiment of the application.

[0027] Figure 6 is a schematic view of the magnetic conducting sleeve of still another embodiment of the application.

[0028] Figure 7 is a schematic view of the magnetic conducting sleeve of another embodiment of the application.

[0029] Reference signs:

[0030] 100, micro-nano magnetic medium sealing device; 1, shell; 101, chamber; 2, rotating shaft; 3, micro-nano magnetic medium sealing assembly; 301, magnetic conducting sleeve; 3011, storage groove; 3012, first end surface; 3013, second end surface; 3014, storage groove; 3015, first sealing groove; 302, first pole shoe; 3021, second sealing groove; 303, second pole shoe; 3031, third sealing groove; 304, first magnet; 4, protruding part; 5, suction part; 6, second magnet; 7, first pole tooth; 8, second pole tooth; 9, first sealing ring; 10, second sealing ring; 11, third sealing ring. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed 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 media according to an embodiment of the present invention includes a housing 1, a rotating shaft 2 and a micro-nano magnetic medium sealing assembly 3. The housing 1 defines a chamber 101, and at least a portion of the rotating shaft 2 is rotatably disposed within the chamber 101.

[0033] The micro / nano magnetic medium sealing assembly 3 is disposed in the chamber 101 and includes a magnetic bushing 301, a first pole shoe 302, a second pole shoe 303, and a first magnet 304. The magnetic bushing 301 is fitted onto the rotating shaft 2, and a storage groove 3011 for storing the micro / nano magnetic medium is formed on the outer wall surface of the magnetic bushing 301. The magnetic bushing 301 has a first end face 3012 and a second end face 3013 that are opposite each other along its axial direction.

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

[0035] In use, the micro / nano magnetic medium sealing device 100 for storing and replenishing micro / nano magnetic media in this embodiment of the invention forms a magnetic circuit between the magnetic bushing 301, the first pole shoe 302, the second pole shoe 303, and the first magnet 304. This allows the micro / nano magnetic medium to be adsorbed into the sealing gap under the action of the magnetic field, achieving a sealing effect during the rotation of the rotating shaft 2. When the rotating shaft 2 operates at low speed, the micro / nano magnetic medium stored in the storage tank 3011 will not be lost due to the small centrifugal force. When the rotation speed of the rotating shaft 2 increases to a certain level, exceeding a preset value, the micro / nano magnetic medium in the storage tank 3011 flows out under the action of centrifugal force. The outflowing micro / nano magnetic medium fills the sealing gap between the first pole shoe 302 and the first end face 3012 and the second pole shoe 303 and the second end face 3013, increasing the amount of micro / nano magnetic medium in the sealing gap to meet the demand of the micro / nano magnetic medium under the high-speed operation of the rotating shaft 2, forming an effective seal and preventing medium leakage.

[0036] Therefore, the micro-nano magnetic medium storage and supplementing micro-nano magnetic medium sealing device 100 of the embodiment of the present application pre-stores the micro-nano magnetic medium in the storage groove 3011 on the outer wall of the magnetic conducting sleeve 301, so that the pre-stored micro-nano magnetic medium is supplemented into the sealing gap in time by the centrifugal force when the rotating shaft 2 rotates at a high speed, to meet the requirement of more micro-nano magnetic medium under the high-speed rotation of the rotating shaft 2, ensure the pressure resistance of the sealing, and improve the reliability and stability of the sealing system.

[0037] In some embodiments, the number of the storage grooves 3011 is multiple, and at least part of the storage grooves 3011 are arranged along the circumference of the magnetic conducting sleeve 301.

[0038] For example, as shown in Figure 3 , at least part of the storage grooves 3011 are arranged along the circumference of the magnetic conducting sleeve 301. Such a design can make the micro-nano magnetic medium uniformly distributed around the magnetic conducting sleeve 301, so that the micro-nano magnetic medium can be uniformly thrown out to the sealing gap when the rotating shaft 2 rotates at a high speed, to improve the uniformity and effectiveness of the sealing. The design of multiple storage grooves 3011 also increases the area in contact with the micro-nano magnetic medium, so that more micro-nano magnetic medium can be stored and utilized, thereby enhancing the sealing effect.

[0039] In some embodiments, the multiple storage grooves 3011 are divided into multiple groove groups, the multiple groove groups are arranged along the axial direction of the magnetic conducting sleeve 301, and each groove group includes multiple storage grooves 3011 arranged along the circumference of the magnetic conducting sleeve 301.

[0040] As shown in Figure 3 and Figure 5 , the groove groups are arranged along the axial direction of the magnetic conducting sleeve 301, which can ensure that uniform distribution of the micro-nano magnetic medium is provided in the entire length range of the rotating shaft 2, so that the sealing effect at each position can be guaranteed when the rotating shaft 2 rotates at a high speed. Each groove group includes multiple storage grooves 3011 arranged along the circumference of the magnetic conducting sleeve 301, which helps the micro-nano magnetic medium to flow uniformly and rapidly into the sealing gap by the centrifugal force when the rotating shaft 2 rotates at a high speed.

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

[0042] In some embodiments, the groove side wall of the storage groove 3011 has multiple protrusions 4 arranged thereon, and the protrusions 4 are in a semispherical shape.

[0043] AsFigure 4 As shown, the interval arrangement of the protrusions 4 helps to break the flow dead zone, reduce the vortex generated by 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 effect is more uniform.

[0044] In some embodiments, the storage tank 3011 extends radially along the magnetic conducting sleeve 301, the storage tank 3011 has a taper, and the cross-sectional area of the storage tank 3011 gradually decreases from the magnetic conducting sleeve 301 to the direction of the rotating shaft 2.

[0045] Due to the tapered shape, the centrifugal force experienced by 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 thrown out of the storage tank 3011 more effectively at high speed. The design of the tapered storage tank 3011 helps the flow of the micro-nano magnetic medium in the storage tank 3011, reduces the flow resistance, and improves the flowability of the micro-nano magnetic medium.

[0046] In other embodiments, the storage tank 3011 is provided with a suction accessory 5, and the suction accessory 5 has a plurality of suction holes for adsorbing the micro-nano magnetic medium.

[0047] The presence of the suction holes on the suction accessory 5 can increase the contact area between the micro-nano magnetic medium and the suction accessory 5, thereby improving the adsorption efficiency and ensuring that more micro-nano magnetic medium can be stored in the storage tank 3011. The suction accessory 5 can ensure uniform distribution of the micro-nano magnetic medium 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 rotating shaft 2 rotates at low speed, the suction accessory 5 can effectively adsorb the micro-nano magnetic medium, reducing the loss of the micro-nano magnetic medium due to centrifugal force. When the rotating shaft 2 rotates at high speed, the suction accessory 5 can timely throw out the adsorbed micro-nano magnetic medium, timely supplement the micro-nano magnetic medium in the sealing gap, and is beneficial to improve the storage reliability of the micro-nano magnetic medium in the storage tank 3011.

[0048] In some embodiments, the inner wall surface of the magnetic conducting sleeve 301 is provided with a storage groove 3014, and the second magnet 6 is arranged in the storage groove 3014. The second magnet 6 is used to magnetically attract the micro-nano magnetic medium stored in the storage tank 3011. When the rotating 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 tank 3011 is greater than the magnetic attraction force between the micro-nano magnetic medium and the second magnet 6.

[0049] The storage groove 3014 is arranged on the inner wall surface of the magnetic conducting sleeve 301, which provides a fixed position for the second magnet 6 and a storage space for the micro-nano magnetic medium. The second magnet 6 is arranged in the storage groove 3014 and used to magnetically attract the micro-nano magnetic medium stored in the storage groove 3011. When the rotating shaft 2 rotates at a low speed, the magnetic attraction of the second magnet 6 can keep the micro-nano magnetic medium in the storage groove 3011, preventing the micro-nano magnetic medium from leaking due to gravity or slight vibration, and improving the working reliability. When the rotating shaft 2 rotates at a high speed, the micro-nano magnetic medium can break away from the magnetic attraction of the second magnet 6 and be thrown out in time, so as to supplement the micro-nano magnetic medium in the sealed gap in time, and improve the storage reliability of the micro-nano magnetic medium in the storage groove 3011.

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

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

[0052] Optionally, as shown in Figures 4 to 7 the first end surface 3012 is provided with a plurality of first pole teeth 7 arranged at intervals in the radial direction of the magnetic conducting sleeve 301, and the first pole teeth 7 and the first pole shoe 302 define a sealing gap therebetween. The second end surface 3013 is provided with a plurality of second pole teeth 8 arranged at intervals in the radial direction of the magnetic conducting sleeve 301, and the second pole teeth 8 and the second pole shoe 303 define a sealing gap therebetween.

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

[0054] As shown in Figure 2 the first sealing ring 9 is arranged in the first sealing groove 3015 and located between the magnetic conducting sleeve 301 and the rotating shaft 2, and used to seal the magnetic conducting sleeve 301 and the rotating shaft 2, which is conducive to further improving the sealing effect of the micro-nano magnetic medium sealing device 100 for storing and supplementing the micro-nano magnetic medium.

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

[0056] As shown in Figure 2 The second sealing ring 10 is installed in the second sealing groove 3021 between the first pole shoe 302 and the shell 1, so as to seal the first pole shoe 302 and the shell 1, thereby further improving the sealing effect of the micro-nano magnetic medium sealing device 100 for micro-nano magnetic medium storage and supplement.

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

[0058] As shown in Figure 2 The third sealing ring 11 is installed in the third sealing groove 3031 between the second pole shoe 303 and the shell 1, so as to seal the second pole shoe 303 and the shell 1, thereby further improving the sealing effect of the micro-nano magnetic medium sealing device 100 for micro-nano magnetic medium storage and supplement.

[0059] Optionally, the micro-nano magnetic medium sealing assembly 3 in the micro-nano magnetic medium sealing device 100 for micro-nano magnetic medium storage and supplement is multi-stage, for example, as shown in Figure 1 The micro-nano magnetic medium sealing assembly 3 is two-stage, and the multi-stage micro-nano magnetic medium sealing assembly 3 is arranged along the axial direction of the rotating shaft 2.

[0060] The two magnetic conducting shaft sleeves 301 in the adjacent two micro-nano magnetic medium sealing assemblies 3 are provided with a rotating shaft sleeve, which is sleeved on the rotating shaft 2 and abuts on the two adjacent magnetic conducting shaft sleeves 301 at both ends. The two pole shoes in the adjacent two micro-nano magnetic medium sealing assemblies 3 are provided with a shell sleeve, which is sleeved on the rotating shaft 2 and abuts on the two adjacent pole shoes at both ends, and the outer wall surface of the shell sleeve is connected with the shell 1.

[0061] Optionally, the rotating shaft 2 is provided with an elastic stop ring, which is used to stop the magnetic conducting shaft sleeve 301.

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

[0063] Specifically, as shown in Figure 1As shown, the micro-nano magnetic medium storage and supplement micro-nano magnetic medium sealing device 100 of the embodiment of the present application is installed as follows: first, the second sealing ring 10 is installed in the first sealing groove 3015 of the first pole shoe 302 and is placed in the housing 1; second, the first sealing ring 9 is installed in the first sealing groove 3015 of the magnetic conducting sleeve 301, and the magnetic conducting sleeve 301 is installed on the rotating shaft 2; third, the first magnet 304 is installed, the third sealing ring 11 is installed in the third sealing groove 3031 of the second pole shoe 303 and is placed in the housing 1; then, the micro-nano magnetic medium 13 is filled in the sealing gap and the storage groove 3011, and then the micro-nano magnetic medium sealing assemblies 3 of the remaining stages are installed in sequence, and finally, the elastic stop ring is installed on the rotating shaft 2 to stop the magnetic conducting sleeve 301, and the end cover is screwed to fix the pole shoes.

[0064] Optionally, the first pole shoe 302, the second pole shoe 303 and the magnetic conducting sleeve 301 can be made of a material with good magnetic conducting performance, 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 a non-magnetic conducting material, such as 316L stainless steel, etc. The type of the micro-nano magnetic medium is selected according to the use environment and the sealing medium, and the micro-nano magnetic medium with different base carrier liquids is selected, which is not specifically limited here.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

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

[0067] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", "fixedly connected", "connection", "fixedly connected", "connected", "fixed", and the like should be construed broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0069] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A micro / nano magnetic medium sealing device for storage and replenishment, characterized in that, include: A housing that defines an external chamber; A rotating shaft, at least a portion of which is rotatably disposed within the cavity; A micro / nano magnetic medium sealing assembly is disposed within the cavity and includes a magnetically conductive sleeve, a first pole shoe, a second pole shoe, and a first magnet. The magnetically conductive sleeve is fitted onto the rotating shaft, and a storage groove for storing micro / nano magnetic media is formed on the outer wall surface of the magnetically conductive sleeve. The storage groove extends radially along the magnetically conductive sleeve, has a taper, and its cross-sectional area gradually decreases from the magnetically conductive sleeve to the rotating shaft. The magnetically conductive sleeve has a first end face and a second end face that are axially opposed to each other. 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 shaft sleeve. There is a sealing gap between the first pole shoe and the first end face and between the second pole shoe and the second end face. The storage tank is configured such that when the rotation speed of the rotating shaft is higher than a preset value, the micro-nano magnetic medium stored therein can be thrown out under the action of centrifugal force and replenished to the sealing gap. The sealing gap is used to fill the micro-nano magnetic medium. The first magnet is disposed between the first pole shoe and the second pole shoe and is located outside the magnetic guide sleeve, and the first magnet is spaced apart from the magnetic guide sleeve; A storage groove is provided on the inner wall of the magnetic bushing, 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 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 force between it and the second magnet.

2. The micro / nano magnetic medium sealing device for storage and replenishment of micro / nano magnetic media according to claim 1, characterized in that, The number of storage slots is multiple, and at least a portion of the storage slots are arranged at circumferential intervals along the magnetic shaft sleeve.

3. The micro / nano magnetic medium sealing device for storage and replenishment of micro / nano magnetic media according to claim 2, characterized in that, The storage slots are divided into multiple slot groups, and the multiple slot groups are arranged at intervals along the axial direction of the magnetic sleeve. Each slot group includes multiple storage slots arranged at intervals along the circumferential direction of the magnetic sleeve.

4. The micro / nano magnetic medium sealing device for storage and replenishment according to claim 1, characterized in that, The storage tank has multiple spaced protrusions on its sidewall, and the protrusions are hemispherical.

5. The micro / nano magnetic medium sealing device for storage and replenishment of micro / nano magnetic media according to claim 1, characterized in that, The storage tank is equipped with an adsorption element, which has multiple adsorption holes for adsorbing micro-nano magnetic media.

6. The micro / nano magnetic medium sealing device for storage and replenishment of micro / nano magnetic media according to claim 1, characterized in that, In the radial direction of the magnetic bushing, the projection of the storage slot at least partially coincides with the projection of the storage tank.

7. The micro / nano magnetic medium sealing device for storage and replenishment of micro / nano magnetic media according to claim 1, characterized in that, The first end face is provided with a plurality of first pole teeth arranged radially at intervals along the magnetic shaft sleeve, and a sealing gap is defined between the first pole teeth and the first pole shoe. The second end face is provided with a plurality of second pole teeth arranged radially at intervals along the magnetic shaft sleeve, and a sealing gap is defined between the second pole teeth and the second pole shoe.

8. The micro / nano magnetic medium sealing device for storage and replenishment of micro / nano magnetic media according to claim 1, characterized in that, A first sealing groove is formed on the inner circumferential surface of the magnetic bushing, and a first sealing ring is provided between the first sealing groove and the rotating shaft; and / or A second sealing groove is formed 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 provided 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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