CN214222011U - Magnetic liquid sealing device and motor with same - Google Patents
Magnetic liquid sealing device and motor with same Download PDFInfo
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- CN214222011U CN214222011U CN202022446535.5U CN202022446535U CN214222011U CN 214222011 U CN214222011 U CN 214222011U CN 202022446535 U CN202022446535 U CN 202022446535U CN 214222011 U CN214222011 U CN 214222011U
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- rotating shaft
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- peripheral surface
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Abstract
The utility model discloses a magnetic liquid sealing device and motor with the same, the magnetic liquid sealing device comprises a shell, a rotating shaft, a first pole shoe, a second pole shoe and an electromagnet, a through hole is arranged on the shell, the rotating shaft is arranged in the shell in a penetrating way, the first pole shoe, the second pole shoe and the electromagnet are all arranged in the shell, the first pole shoe, the second pole shoe and the electromagnet are sleeved on the rotating shaft, the first pole shoe is spaced from the rotating shaft in the radial direction of the rotating shaft, magnetic liquid is filled between the first pole shoe and the rotating shaft, the second pole shoe is spaced from the rotating shaft in the radial direction of the rotating shaft, magnetic liquid is filled between the second pole shoe and the rotating shaft, the electromagnet is spaced from the rotating shaft in the radial direction of the rotating shaft, the electromagnet is positioned between the first pole shoe and the second pole shoe in the axial direction of the rotating shaft, the electromagnet is in contact with the first pole shoe and the second pole shoe, an external power supply leads in alternating current to the electromagnet, the wire passes through the through hole. The utility model discloses a magnetic liquid sealing device sealing performance is good, and pivot start-up moment is low.
Description
Technical Field
The utility model relates to a mechanical seal technical field specifically, relates to a magnetic liquid sealing device and motor that has it.
Background
The magnetic liquid is a new functional liquid material capable of quickly responding to an external magnetic field, and is characterized by that a layer of surfactant is coated on the surface of nano-grade magnetic solid particles, then uniformly dispersed in the base carrier liquid so as to form a stable colloidal solution. Therefore, the magnetic liquid has the fluidity of common liquid and the magnetism of magnetic substances, can be applied to a plurality of fields such as sealing, sensors, vibration absorbers, lubrication and the like, and is widely applied to different sealing occasions in civil and military industries at present.
In the related technology, the magnetic field at the pole teeth of the pole shoe is strongest, magnetic particles are easy to gather at the pole teeth, so that the concentration of the magnetic liquid is uneven, the sealing performance of the magnetic liquid sealing device is influenced, and the magnetic liquid sealing device is easy to solidify after being stored in a low-temperature environment for a long time, so that the starting torque of the magnetic liquid sealing device is large.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
Therefore, an embodiment of an aspect of the present invention provides a magnetic liquid sealing device, which has good sealing performance, and the magnetic liquid therein is not easy to condense, and the starting torque is small.
An embodiment of another aspect of the present invention provides a motor, which includes the above magnetic liquid sealing device.
According to the utility model discloses a magnetic fluid seal device of embodiment of first aspect includes: the shell is provided with a through hole; the rotating shaft penetrates through the shell and can rotate relative to the shell; the first pole shoe is arranged in the shell, the first pole shoe is sleeved on the rotating shaft and is spaced from the rotating shaft in the radial direction of the rotating shaft, the outer peripheral surface of the first pole shoe is attached to the inner peripheral surface of the shell, and magnetic liquid is filled between the first pole shoe and the rotating shaft; the second pole shoe is arranged in the shell, the second pole shoe is sleeved on the rotating shaft and is spaced from the rotating shaft in the radial direction of the rotating shaft, the outer peripheral surface of the second pole shoe is attached to the inner peripheral surface of the shell, magnetic liquid is filled between the second pole shoe and the rotating shaft, and the second pole shoe and the first pole shoe are arranged at intervals in the axial direction of the rotating shaft; the electromagnet is arranged in the shell, sleeved on the rotating shaft and spaced apart from the rotating shaft in the radial direction of the rotating shaft, the electromagnet is positioned between the first pole shoe and the second pole shoe in the axial direction of the rotating shaft, the electromagnet is in contact with both the first pole shoe and the second pole shoe, an external power supply supplies alternating current to the electromagnet through a lead, and the lead penetrates through the through hole.
According to the utility model discloses magnetic liquid sealing device, through set up the electro-magnet that lets in the alternating current between first pole shoe and second pole shoe, and fill magnetic liquid between first pole shoe and the pivot, fill magnetic liquid between second pole shoe and the pivot, the magnetic field that the electro-magnet produced can adsorb magnetic liquid in preset position, in order to improve sealed effect, and can utilize the change of magnetic field direction, drive magnetic liquid carries out the motion regularly, thereby make magnetic liquid be difficult for condensing under low temperature environment, reduce pivot start-up torque.
In some embodiments, the first pole piece has a first pole ring gear on its inner circumferential surface, the first pole ring gear is spaced from the rotating shaft in the radial direction of the rotating shaft to form a first gap, and the second pole piece has a second pole ring gear on its inner circumferential surface, the second pole ring gear is spaced from the rotating shaft in the radial direction of the rotating shaft to form a second gap
In some embodiments, the first polar ring is plural, the plural first polar rings are arranged at intervals in the axial direction of the rotating shaft, the plural second polar rings are plural, and the plural second polar rings are arranged at intervals in the axial direction of the rotating shaft.
In some embodiments, the magnetic liquid seal apparatus further comprises: the outer peripheral surface of the first pole shoe is provided with a first annular groove, the first sealing ring is matched in the first annular groove, and the outer peripheral surface of the first sealing ring is attached to the inner peripheral surface of the shell; and the outer peripheral surface of the second pole shoe is provided with a second annular groove, the second sealing ring is matched in the second annular groove, and the outer peripheral surface of the second sealing ring is attached to the inner peripheral surface of the shell.
In some embodiments, the magnetic liquid sealing device further includes a first magnetism isolating ring and a second magnetism isolating ring, both of which are sleeved on the rotating shaft, the first magnetism isolating ring is located on a side of the first pole shoe away from the second pole shoe, and the first magnetism isolating ring is in contact with the first pole shoe, the second magnetism isolating ring is located on a side of the second pole shoe away from the first pole shoe, and the second magnetism isolating ring is in contact with the second pole shoe.
In some embodiments, the magnetic liquid sealing device further includes a first bearing and a second bearing, an outer peripheral surface of the first bearing and an outer peripheral surface of the second bearing are attached to an inner peripheral surface of the housing, the rotating shaft is disposed through the first bearing and the second bearing, the first bearing and the second bearing are arranged at intervals in an axial direction of the rotating shaft, the first magnetism isolating ring and the second magnetism isolating ring are both located between the first bearing and the second bearing, the first magnetism isolating ring is in contact with the first bearing, and the second magnetism isolating ring is in contact with the second bearing.
An electric machine according to an embodiment of the second aspect of the present invention includes the magnetic liquid seal device of any one of the above.
According to the utility model discloses motor, through adopting above-mentioned magnetic liquid sealing device, motor sealing performance is good, and starting torque is little, and operating efficiency is high.
Drawings
Fig. 1 is a cross-sectional view of a magnetic liquid seal device according to an embodiment of the present invention.
Reference numerals:
a magnetic liquid sealing device 1;
a housing 10; a cylindrical member 101; a cover plate 102;
a rotating shaft 20;
a first pole piece 30; a first polar ring 301; a first tooth slot 302; a first seal ring 303; a first magnetism isolating ring 304;
a second pole piece 40; a second seal ring 401; a second magnetism isolating ring 402; a second polar ring 403;
an electromagnet 50;
a first bearing 60; a second bearing 70.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1, a magnetic liquid sealing apparatus 1 according to an embodiment of the present invention includes a housing 10, a rotating shaft 20, a first pole piece 30, a second pole piece 40, and an electromagnet 50.
The rotating shaft 20 is disposed through the housing 10 and is rotatable relative to the housing 10. As shown in fig. 1, the housing 10 includes a cylindrical member 101 and a cover plate 102, both left and right ends of the cylindrical member 101 are open, the cover plate 102 is connected to the right end opening of the cylindrical member 101, the cover plate 102 has a through hole penetrating through the cover plate 102 in the left-right direction, the rotating shaft 20 is inserted through the cylindrical member 101 in the left-right direction, the left end of the rotating shaft 20 extends from the left end opening of the housing 10, and the right end of the rotating shaft 20 extends from the through hole of the cover plate 102.
The first pole piece 30 is disposed in the casing 10, the first pole piece 30 is sleeved on the rotating shaft 20 and spaced apart from the rotating shaft 20 in a radial direction of the rotating shaft 20, an outer circumferential surface of the first pole piece 30 is attached to an inner circumferential surface of the casing 10, and a magnetic liquid is filled between the first pole piece 30 and the rotating shaft 20.
As shown in fig. 1, the first pole piece 30 has a through hole penetrating the first pole piece 30 in the left-right direction, the rotating shaft 20 penetrates the through hole, a space is provided between an inner circumferential surface of the first pole piece 30 and an outer circumferential surface of the rotating shaft 20, and the magnetic liquid is filled in the space.
The second pole piece 40 is disposed in the casing 10, the second pole piece 40 is sleeved on the rotating shaft 20 and is spaced apart from the rotating shaft 20 in the radial direction of the rotating shaft 20, the outer circumferential surface of the second pole piece 40 is attached to the inner circumferential surface of the casing 10, magnetic liquid is filled between the second pole piece 40 and the rotating shaft 20, and the second pole piece 40 and the first pole piece 30 are spaced apart in the axial direction of the rotating shaft 20.
As shown in fig. 1, the second pole piece 40 has a through hole penetrating the second pole piece 40 in the left-right direction, the rotating shaft 20 passes through the through hole, the first pole piece 30 is spaced apart from the second pole piece 40 in the left-right direction, and a space is provided between an inner circumferential surface of the second pole piece 40 and an outer circumferential surface of the rotating shaft 20, and the magnetic liquid is filled in the space.
The electromagnet 50 is disposed in the housing 10, the electromagnet 50 is sleeved on the rotating shaft 20 and is spaced apart from the rotating shaft 20 in a radial direction of the rotating shaft 20, the electromagnet 50 is located between the first pole piece 30 and the second pole piece 40 in an axial direction of the rotating shaft 20, and the electromagnet 50 is in contact with both the first pole piece 30 and the second pole piece 40.
As shown in fig. 1, the electromagnet 50 surrounds the outer circumference of the rotating shaft 20, and the inner circumferential surface of the electromagnet 50 is spaced apart from the outer circumferential surface of the rotating shaft 20, and in the left-right direction, the electromagnet 50 is located between the first pole piece 30 and the second pole piece 40, and the first pole piece 30 is located on the left side of the electromagnet 50 and is in contact with the electromagnet 50, and the second pole piece 40 is located on the right side of the electromagnet 50 and is in contact with the electromagnet 50.
An external power supply supplies alternating current to the electromagnet 50 through a wire, and the housing 10 has a through hole through which the wire passes. It can be understood that when current is applied to the electromagnet 50, the electromagnet 50 generates a magnetic field, and the magnetic liquid moves and is uniformly distributed between the pole piece and the rotating shaft 20 under the action of the magnetic field, and when alternating current is applied to the electromagnet 50, the direction of the magnetic field generated by the electromagnet 50 also changes periodically due to the periodic change of the current direction of the alternating current, and accordingly, the magnetic liquid reciprocates regularly. And the conducting wire extends into the shell 10 through the through hole on the shell 10 and is connected with the electromagnet 50, when the rotating shaft 20 rotates relative to the shell 10, the conducting wire cannot rotate along with the rotating shaft 20, so that the conducting wire is not easy to damage and has long service life.
In addition, the first pole piece 30, the rotating shaft 20 and the second pole piece 40 are all made of magnetic conductive materials, so that when the electromagnet 50 is powered on, the electromagnet 50, the first pole piece 30, the magnetic liquid, the rotating shaft 20 and the second pole piece 40 can form a magnetic loop, so that the magnetic field generated by the electromagnet 50 can stably adsorb the magnetic liquid.
According to the utility model discloses magnetic liquid sealing device, through set up the electro-magnet that lets in the alternating current between first pole shoe and second pole shoe, and fill magnetic liquid between first pole shoe and the pivot, fill magnetic liquid between second pole shoe and the pivot, the magnetic field that the electro-magnet produced can adsorb magnetic liquid in preset position, in order to improve sealed effect, and can utilize the change of magnetic field direction, drive magnetic liquid carries out the motion regularly, thereby make magnetic liquid be difficult for condensing under low temperature environment, reduce pivot start-up torque.
In some embodiments, as shown in fig. 1, the first pole piece 30 is provided with a first pole ring 301 on an inner circumferential surface thereof, the first pole ring 301 is spaced apart from the rotating shaft 20 in a radial direction of the rotating shaft 20 to form a first gap, the second pole piece 40 is provided with a second pole ring 403 on an inner circumferential surface thereof, and the second pole ring 403 is spaced apart from the rotating shaft 20 in the radial direction of the rotating shaft 20 to form a second gap.
As shown in fig. 1, the first polar ring 301 surrounds the outer circumference of the rotating shaft 20, and a first gap is formed between the inner circumferential surface of the first polar ring 301 and the outer circumferential surface of the rotating shaft 20, and the magnetic liquid may be filled in the first gap, the second polar ring 403 surrounds the outer circumference of the rotating shaft 20, and a second gap is formed between the inner circumferential surface of the second polar ring 403 and the outer circumferential surface of the rotating shaft 20, and the magnetic liquid may be filled in the second gap.
Further, as shown in fig. 1, the first pole ring gear 301 is plural, the plural first pole ring gears 301 are arranged at intervals in the axial direction (the left-right direction shown in fig. 1) of the rotating shaft 20, the plural second pole ring gears 403 are plural, and the plural second pole ring gears 403 are arranged at intervals in the axial direction of the rotating shaft 20.
As shown in fig. 1, a first tooth space 302 is formed between two adjacent first polar rings 301, a plurality of first polar rings 301 are alternately distributed with the plurality of first tooth spaces 302, a second tooth space is formed between two adjacent second polar rings 403, and the plurality of second polar rings 403 are alternately distributed with the plurality of second tooth spaces. It can be understood that the magnetic permeability of the polar ring and the magnetic permeability of the tooth socket are different, so that a magnetic field gradient (magnetic field intensity at the polar ring and magnetic field intensity at the tooth socket) can be formed in the axial direction of the rotating shaft 20, so that the magnetic liquid is adsorbed at each polar ring, the magnetic liquid is prevented from flowing randomly, and the sealing effect is improved.
As shown in fig. 1, the magnetic liquid sealing device 1 further includes a first sealing ring 303 and a second sealing ring 401, the outer peripheral surface of the first pole piece 30 has a first annular groove, the first sealing ring 303 is fitted in the first annular groove, and the outer peripheral surface of the first sealing ring 303 is attached to the inner peripheral surface of the housing 10. Therefore, the first sealing ring can improve the sealing performance of the joint surface of the first pole piece and the shell.
The outer peripheral surface of the second pole piece 40 is provided with a second annular groove, a second sealing ring 401 is fitted in the second annular groove, and the outer peripheral surface of the second sealing ring 401 is attached to the inner peripheral surface of the housing 10. Therefore, the second sealing ring can improve the sealing performance of the joint surface of the second pole piece and the shell.
In some embodiments, as shown in fig. 1, the magnetic fluid sealing apparatus 1 further includes a first magnetism isolating ring 304 and a second magnetism isolating ring 402, the first magnetism isolating ring 304 and the second magnetism isolating ring 402 are both disposed on the rotating shaft 20, the first magnetism isolating ring 304 is disposed on a side of the first pole piece 30 away from the second pole piece 40, the first magnetism isolating ring 304 is in contact with the first pole piece 30, the second magnetism isolating ring 402 is disposed on a side of the second pole piece 40 away from the first pole piece 30, and the second magnetism isolating ring 402 is in contact with the second pole piece 40.
As shown in fig. 1, the first magnetism isolating ring 304 and the second magnetism isolating ring 402 are arranged at an interval in the left-right direction, the first magnetism isolating ring 304 is attached to the left side of the first pole shoe 30, and the second magnetism isolating ring 402 is attached to the right side of the second pole shoe 40.
Further, the first magnetism isolating ring 304 and the second magnetism isolating ring 402 are made of non-magnetic conductive material, so that the first magnetism isolating ring and the second magnetism isolating ring can avoid magnetic field leakage, improve the reliability of magnetic liquid absorption by the magnetic field, further make the magnetic liquid in the magnetic liquid sealing device uniformly distributed, and improve the sealing reliability.
In some embodiments, as shown in fig. 1, the magnetic fluid sealing device 1 further includes a first bearing 60 and a second bearing 70, an outer circumferential surface of the first bearing 60 and an outer circumferential surface of the second bearing 70 are attached to an inner circumferential surface of the housing 10, the rotating shaft 20 is disposed through the first bearing 60 and the second bearing 70, and the first bearing 60 and the second bearing 70 are spaced apart in an axial direction of the rotating shaft 20.
As shown in fig. 1, the first bearing 60 and the second bearing 70 are both sleeved on the rotating shaft 20, and the first bearing 60 and the second bearing 70 are arranged at an interval in the left-right direction for supporting the rotating shaft 20.
The first magnetism isolating ring 304 and the second magnetism isolating ring 402 are both located between the first bearing 60 and the second bearing 70, and the first magnetism isolating ring 304 is in contact with the first bearing 60, and the second magnetism isolating ring 402 is in contact with the second bearing 70.
Specifically, as shown in fig. 1, the first bearing 60 is located on the left side of the first magnetism isolating ring 304, and the second bearing 70 is located on the right side of the second magnetism isolating ring 402, when assembling the magnetic liquid sealing device 1, the second bearing 70, the second magnetism isolating ring 402, and the second pole shoe 40 may be assembled in the housing 10 in sequence, then the electromagnet 50, the first pole shoe 30, the first magnetism isolating ring 304, and the first bearing 60 may be assembled in the cylindrical member 101 in sequence, and finally the cover plate 102 is connected to the cylindrical member 101, thereby completing the assembly of the magnetic liquid sealing device 1.
It can be understood that the second bearing 70, the second magnetism isolating ring 402, the second pole shoe 40, the electromagnet 50, the first pole shoe 30, the first magnetism isolating ring 304 and the first bearing 60 are in contact in sequence, so that the assembling and positioning functions can be achieved.
According to the utility model discloses motor includes according to the utility model discloses magnetic liquid sealing device 1.
According to the utility model discloses motor, through adopting this magnetic fluid sealing device 1, motor sealing performance is good, and starting torque is little, and operating efficiency is high.
A magnetic liquid seal device 1 according to one specific example of the present invention is described below with reference to fig. 1.
As shown in fig. 1, the magnetic fluid sealing device 1 includes a housing 10, a first bearing 60, a first magnetism isolating ring 304, a first pole shoe 30, an electromagnet 50, a second pole shoe 40, a second magnetism isolating ring 402, a second bearing 70, a first sealing ring 303, a second sealing ring 401, and a rotating shaft 20.
The casing 10 includes a cylindrical part 101 and a cover plate 102, the cylindrical part 101 extends along the left-right direction, both ends of the cylindrical part 101 are open, the cover plate 102 is connected to the right end opening of the cylindrical part 101, the cover plate 102 has a through hole penetrating through the cover plate 102 along the left-right direction, the rotating shaft 20 is arranged in the cylindrical part 101 in a penetrating manner, the left end of the rotating shaft 20 extends out of the left end opening of the cylindrical part 101, and the right end of the rotating shaft 20 extends out of the through hole of the cover plate 102.
The first bearing 60, the first magnetism isolating ring 304, the first pole shoe 30, the electromagnet 50, the second pole shoe 40, the second magnetism isolating ring 402 and the second bearing 70 are arranged in the cylindrical part 101 and are all sleeved on the rotating shaft 20, and the first bearing 60, the first magnetism isolating ring 304, the first pole shoe 30, the electromagnet 50, the second pole shoe 40, the second magnetism isolating ring 402 and the second bearing 70 are sequentially arranged from left to right and are in close contact with each other.
The outer peripheral surface of the first pole piece 30 is attached to the inner peripheral surface of the cylindrical part 101, the outer peripheral surface of the first pole piece 30 is provided with a first annular groove, the first sealing ring 303 is matched in the first annular groove, the outer peripheral surface of the first sealing ring 303 is attached to the inner peripheral surface of the cylindrical part 101, a plurality of first pole tooth rings 301 protrude from the inner peripheral surface of the first pole piece 30, the first pole tooth rings 301 are arranged at intervals in the left-right direction, and a first tooth groove 302 is formed between every two adjacent first pole tooth rings 301.
The outer peripheral surface of the second pole piece 40 is attached to the inner peripheral surface of the cylindrical part 101, the outer peripheral surface of the second pole piece 40 is provided with a second annular groove, a second sealing ring 401 is fitted in the second annular groove, the outer peripheral surface of the second sealing ring 401 is attached to the inner peripheral surface of the cylindrical part 101, a plurality of second polar toothed rings 403 protrude from the inner peripheral surface of the second pole piece 40, the second polar toothed rings 403 are arranged at intervals in the left-right direction, and a second tooth groove is formed between every two adjacent second polar toothed rings 403.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "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 based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (7)
1. A magnetic fluid seal assembly, comprising:
the shell is provided with a through hole;
the rotating shaft penetrates through the shell and can rotate relative to the shell;
the first pole shoe is arranged in the shell, the first pole shoe is sleeved on the rotating shaft and is spaced from the rotating shaft in the radial direction of the rotating shaft, the outer peripheral surface of the first pole shoe is attached to the inner peripheral surface of the shell, and magnetic liquid is filled between the first pole shoe and the rotating shaft;
the second pole shoe is arranged in the shell, the second pole shoe is sleeved on the rotating shaft and is spaced from the rotating shaft in the radial direction of the rotating shaft, the outer peripheral surface of the second pole shoe is attached to the inner peripheral surface of the shell, magnetic liquid is filled between the second pole shoe and the rotating shaft, and the second pole shoe and the first pole shoe are arranged at intervals in the axial direction of the rotating shaft;
the electromagnet is arranged in the shell, sleeved on the rotating shaft and spaced apart from the rotating shaft in the radial direction of the rotating shaft, the electromagnet is positioned between the first pole shoe and the second pole shoe in the axial direction of the rotating shaft, the electromagnet is in contact with both the first pole shoe and the second pole shoe, an external power supply supplies alternating current to the electromagnet through a lead, and the lead penetrates through the through hole.
2. The magnetic liquid sealing device according to claim 1, wherein a first pole ring gear is provided on an inner peripheral surface of the first pole piece, the first pole ring gear is spaced apart from the rotating shaft in a radial direction of the rotating shaft to form a first gap, a second pole ring gear is provided on an inner peripheral surface of the second pole piece, the second pole ring gear is spaced apart from the rotating shaft in the radial direction of the rotating shaft to form a second gap, and a magnetic liquid is adapted to be filled in the first gap and the second gap.
3. The magnetic liquid seal device according to claim 2, wherein the first polar ring is plural, the plural first polar rings are arranged at intervals in the axial direction of the rotating shaft, the plural second polar rings are plural, and the plural second polar rings are arranged at intervals in the axial direction of the rotating shaft.
4. The magnetic-fluid seal apparatus of claim 1, further comprising:
the outer peripheral surface of the first pole shoe is provided with a first annular groove, the first sealing ring is matched in the first annular groove, and the outer peripheral surface of the first sealing ring is attached to the inner peripheral surface of the shell;
and the outer peripheral surface of the second pole shoe is provided with a second annular groove, the second sealing ring is matched in the second annular groove, and the outer peripheral surface of the second sealing ring is attached to the inner peripheral surface of the shell.
5. The magnetic fluid seal apparatus of claim 1, further comprising a first magnetism isolating ring and a second magnetism isolating ring, both of which are disposed on the rotating shaft, wherein the first magnetism isolating ring is disposed on a side of the first pole shoe away from the second pole shoe, and the first magnetism isolating ring is in contact with the first pole shoe, the second magnetism isolating ring is disposed on a side of the second pole shoe away from the first pole shoe, and the second magnetism isolating ring is in contact with the second pole shoe.
6. The magnetic fluid sealing device of claim 5, further comprising a first bearing and a second bearing, wherein an outer peripheral surface of the first bearing and an outer peripheral surface of the second bearing are attached to an inner peripheral surface of the housing, the rotating shaft is disposed through the first bearing and the second bearing, the first bearing and the second bearing are disposed at intervals in an axial direction of the rotating shaft, the first magnetism isolating ring and the second magnetism isolating ring are both disposed between the first bearing and the second bearing, the first magnetism isolating ring is in contact with the first bearing, and the second magnetism isolating ring is in contact with the second bearing.
7. An electrical machine comprising a magnetic fluid seal arrangement according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022446535.5U CN214222011U (en) | 2020-10-28 | 2020-10-28 | Magnetic liquid sealing device and motor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022446535.5U CN214222011U (en) | 2020-10-28 | 2020-10-28 | Magnetic liquid sealing device and motor with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214222011U true CN214222011U (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022446535.5U Active CN214222011U (en) | 2020-10-28 | 2020-10-28 | Magnetic liquid sealing device and motor with same |
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|---|---|
| CN (1) | CN214222011U (en) |
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2020
- 2020-10-28 CN CN202022446535.5U patent/CN214222011U/en active Active
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