CN112648382B - Magnetic liquid sealing device - Google Patents
Magnetic liquid sealing device Download PDFInfo
- Publication number
- CN112648382B CN112648382B CN202011626792.5A CN202011626792A CN112648382B CN 112648382 B CN112648382 B CN 112648382B CN 202011626792 A CN202011626792 A CN 202011626792A CN 112648382 B CN112648382 B CN 112648382B
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- rotating shaft
- pole
- shaft
- shaft sleeve
- axial direction
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- 238000007789 sealing Methods 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000011553 magnetic fluid Substances 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 description 12
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Devices (AREA)
- Sealing Of Bearings (AREA)
Abstract
本发明公开了一种磁性液体密封装置，所述磁性液体密封装置包括壳体、转轴、轴套、多个极靴和永磁体，所述壳体内具有腔室，所述转轴可转动地设在所述腔室内，所述轴套套设在所述转轴上以随所述转轴转动，多个所述极靴在所述转轴的轴向上间隔布置，所述极靴套在所述轴套外面，所述极靴的内周面设有沿该极靴周向延伸的多个极齿，多个所述极齿沿该极靴的轴向间隔布置，所述永磁体套在所述转轴外面，其中，所述轴套的外周面上设有周向凹槽，所述轴套沿所述转轴的轴向位置可调以使所述周向凹槽与所述极靴的极齿面对或偏离。本发明的磁性液体密封装置具有结构简单、可靠性强、可长时间存储的特点。
The invention discloses a magnetic liquid sealing device. The magnetic liquid sealing device comprises a casing, a rotating shaft, a shaft sleeve, a plurality of pole pieces and a permanent magnet. The casing is provided with a cavity, and the rotating shaft is rotatably arranged at In the chamber, the shaft sleeve is sleeved on the rotating shaft to rotate with the rotating shaft, a plurality of the pole shoes are arranged at intervals in the axial direction of the rotating shaft, and the pole shoes are sleeved outside the shaft sleeve , the inner peripheral surface of the pole piece is provided with a plurality of pole teeth extending along the circumferential direction of the pole piece, the plurality of pole teeth are arranged at intervals along the axial direction of the pole piece, and the permanent magnet is sleeved outside the rotating shaft , wherein a circumferential groove is provided on the outer peripheral surface of the shaft sleeve, and the axial position of the shaft sleeve along the rotating shaft can be adjusted so that the circumferential groove faces or deviates from the pole teeth of the pole piece. The magnetic liquid sealing device of the invention has the characteristics of simple structure, strong reliability and long-term storage.
Description
Technical Field
The invention relates to the technical field of mechanical engineering sealing, in particular to a magnetic liquid sealing device.
Background
When the magnetic liquid sealing device is used for sealing at present, due to working condition requirements, when the magnetic liquid sealing device is stored for a long time or used again after being intermittent for a long time, the magnetic liquid can slowly settle under the action of a magnetic field, and finally, magnetic particles of the magnetic liquid are separated from base carrier liquid, so that the sealing device fails. Therefore, the problem of the stability reduction of the magnetic liquid due to the long-term storage and parking of the magnetic liquid seal is to be solved.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
according to the existing magnetic liquid sealing device, if the magnetic liquid sealing device is stored for a long time after assembly is completed, the magnetic liquid can be layered or agglomerated under the action of a sealing gap strong magnetic field, so that the starting torque of a sealing element is increased, the sealing capability is reduced, and even the sealing element fails.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, embodiments of the present invention propose a magnetic liquid sealing device capable of effectively preventing the magnetic liquid from delaminating or agglomerating.
The magnetic liquid sealing device comprises a shell, a rotating shaft, a shaft sleeve, a plurality of pole shoes and permanent magnets, wherein a cavity is formed in the shell, the rotating shaft is rotatably arranged in the cavity, the shaft sleeve is sleeved on the rotating shaft to rotate along with the rotating shaft, the pole shoes are arranged at intervals in the axial direction of the rotating shaft, the pole shoes are sleeved outside the shaft sleeve, the inner circumferential surfaces of the pole shoes are provided with a plurality of pole teeth extending along the circumferential direction of the pole shoes, the pole teeth are arranged at intervals in the axial direction of the pole shoes, the inner circumferential surfaces of the pole teeth and the outer circumferential surfaces of the shaft sleeve are spaced in the radial direction of the rotating shaft to form a sealing gap, magnetic liquid adsorbed on the pole teeth is arranged in the sealing gap, the permanent magnets are sleeved outside the rotating shaft, the permanent magnets are arranged between adjacent pole shoes in the axial direction of the rotating shaft, and the magnetic liquid sealing device comprises a sealing body, the peripheral surface of the shaft sleeve is provided with a circumferential groove, and the axial position of the shaft sleeve along the rotating shaft is adjustable so that the circumferential groove faces or deviates from the pole teeth of the pole shoe.
According to the magnetic liquid sealing device provided by the embodiment of the invention, the magnetic liquid can be used for filling the sealing gap formed between the pole teeth and the rotating shaft, so that the sealing effect is realized, and the magnetic liquid sealing device has the characteristics of safety, reliability, quick response and long-time storage.
In some embodiments, the circumferential groove is plural and corresponds one-to-one to the plural pole shoes.
In some embodiments, the shaft is rotatably supported by a plurality of bearings disposed within the chamber, and the pole pieces are positioned between adjacent bearings.
In some embodiments, the magnetic liquid sealing device further comprises a magnetism isolating ring, which is sleeved outside the shaft sleeve and is located between the bearings and the pole shoes which are adjacent to each other.
In some embodiments, a width of the circumferential groove in an axial direction of the rotating shaft is not smaller than a width of the pole shoe in the axial direction of the rotating shaft.
In some embodiments, the housing includes a barrel, a first end cap disposed at one end of the barrel, and a second end cap disposed at the other end of the barrel.
In some embodiments, the magnetic fluid seal further comprises a spacer sleeve fitted over the shaft and between the bearing and the second end cap.
In some embodiments, the shaft sleeve and the pole shoe are made of magnetic conductive materials, and the magnetism isolating ring, the shell and the magnetism isolating sleeve are made of non-magnetic conductive materials.
In some embodiments, the magnetic liquid sealing device further comprises an adjusting member, which is connected to the shaft sleeve and is used for driving the shaft sleeve to move along the axial direction of the rotating shaft so as to adjust the position of the shaft sleeve.
In some embodiments, the rotating shaft is provided with a flange, the flange is provided with a through hole which penetrates along the axial direction of the rotating shaft, a threaded hole is formed in the end surface of the shaft sleeve, the adjusting piece is a bolt, and the bolt penetrates through the through hole and is matched in the threaded hole.
Drawings
Fig. 1 is a schematic structural view of a storage state of a magnetic liquid sealing apparatus according to an embodiment of the present invention.
Fig. 2 is a structural schematic diagram of a normal operation state of the magnetic liquid sealing device according to the embodiment of the invention.
Reference numerals:
the magnetic field generator comprises a shell 1, a cylinder 11, a first end cover 12, a second end cover 13, a rotating shaft 2, a flange 21, a through hole 211, a shaft sleeve 3, a circumferential groove 31, a threaded hole 32, a pole shoe 4, pole teeth 41, a permanent magnet 5, a bearing 6, a magnetism isolating ring 7, a spacing sleeve 8 and an adjusting piece 9.
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 illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A magnetic liquid sealing apparatus according to an embodiment of the present invention is described below with reference to the accompanying drawings.
The magnetic liquid sealing device according to the embodiment of the invention comprises a shell 1, a rotating shaft 2, a shaft sleeve 3, a plurality of pole shoes 4 and permanent magnets 5, wherein the shell 1 is internally provided with a cavity, the rotating shaft 2 is rotatably arranged in the cavity, the shaft sleeve 3 is sleeved on the rotating shaft 2 to rotate along with the rotating shaft 2, the pole shoes 4 are arranged at intervals in the axial direction of the rotating shaft 2, the pole shoes 4 are sleeved outside the shaft sleeve 3, the inner circumferential surface of each pole shoe 4 is provided with a plurality of pole teeth 41 extending along the circumferential direction of the pole shoe 4, a plurality of pole teeth 41 are arranged at intervals in the axial direction of the pole shoe 4, the inner circumferential surface of each pole tooth 41 is spaced from the outer circumferential surface of the shaft sleeve 3 in the radial direction of the rotating shaft 2 to form a sealing gap, magnetic liquid adsorbed on the pole teeth 41 is arranged in the sealing gap, the permanent magnets 5 are sleeved outside the rotating shaft 2, the permanent magnets 5 are arranged between the adjacent pole shoes 4 in the axial direction of the rotating shaft 2, wherein the outer circumferential surface of the shaft sleeve 3 is provided with a circumferential groove 31, the axial position of the sleeve 3 along the shaft 2 is adjustable so that the circumferential groove 31 faces or deviates from the pole teeth 41 of the pole shoe 4.
As shown in fig. 1-2, a rotating shaft 2 penetrates through a cavity in a housing 1, the rotating shaft 2 is rotatable, a shaft sleeve 3 is sleeved outside the rotating shaft 2, the shaft sleeve 3 rotates along with the rotation of the rotating shaft 2, a plurality of pole shoes 4 are sleeved outside the shaft sleeve 3, the pole shoes 4 are arranged on the shaft sleeve 3 at intervals from left to right, a plurality of pole teeth 41 are arranged on the inner circumferential surface of the pole shoes 4 at intervals along the left-right direction, a sealing gap is formed between the inner circumferential surface of the pole tooth 41 and the outer circumferential surface of the rotating shaft 2 at intervals in the up-down direction of fig. 1, magnetic liquid is contained in the sealing gap, the magnetic liquid is adsorbed on the pole teeth 41, a permanent magnet 5 is further sleeved outside the rotating shaft 2, the permanent magnet 5 is located between adjacent pole shoes 4, a circumferential groove 31 is arranged on the outer circumferential surface of the shaft sleeve 3, the left-right position of the shaft sleeve 3 on the rotating shaft 2 is adjustable, when the circumferential groove 31 faces the pole teeth 41 of the pole shoes 4, the gap between the pole teeth 41 surface of the pole teeth 41 and the outer circumferential surface of the shaft sleeve 3 is increased, when the circumferential groove 31 deviates from the pole tooth 41 surface of the pole shoe 4, the gap between the pole tooth 41 surface and the outer circumferential surface of the shaft sleeve 3 becomes smaller, and at the moment, the magnetic field applied to the magnetic liquid becomes stronger, and the magnetic liquid sealing device starts to work.
According to the magnetic liquid sealing device provided by the embodiment of the invention, the magnetic liquid can be used for filling the sealing gap formed between the pole teeth 41 and the rotating shaft 2, so that the sealing effect is realized, and the magnetic liquid sealing device has the characteristics of safety, reliability, quick response and long-time storage.
In some embodiments, the circumferential groove 31 is plural and corresponds one-to-one to the plural pole shoes 4. As shown in fig. 1-2, each circumferential groove 31 corresponds to one pole shoe 4, so that the magnetic liquid absorbed by the pole teeth 41 of each pole shoe 4 can be stored for a long time.
In some embodiments, the shaft 2 is rotatably supported by a plurality of bearings 6 disposed within the chamber. As shown in fig. 1-2, a plurality of bearings 6 are disposed in the chamber, the plurality of bearings 6 are sleeved outside the rotating shaft 2, and the plurality of bearings 6 rotatably support the rotating shaft 2.
In some embodiments, the magnetic liquid sealing device further comprises a magnetism isolating ring 7, and the magnetism isolating ring 7 is sleeved outside the shaft sleeve 3 and is positioned between the bearing 6 and the pole shoe 4 which are adjacent to each other. As shown in fig. 1-2, a magnetism isolating ring 7 is disposed between the bearing 6 and the pole shoe 4 adjacent to each other to isolate the bearing 6 from the pole shoe 4, so as to prevent the bearing 6 from influencing the magnetic field of the pole shoe 4.
In some embodiments, the width of the circumferential groove 31 in the axial direction of the rotating shaft 2 is not smaller than the width of the pole shoe 4 in the axial direction of the rotating shaft 2. As shown in fig. 1-2, the width of the circumferential groove 31 in the axial direction of the rotating shaft 2 needs to be greater than or equal to the width of the pole shoe 4 in the axial direction of the rotating shaft 2, so as to ensure that the magnetic liquid adsorbed on the pole teeth 41 is completely located in the circumferential groove 31, which is beneficial for long-time storage.
In some embodiments, the housing 1 includes a barrel 11, a first end cap 12 and a second end cap 13, the first end cap 12 being disposed at one end of the barrel 11, the second end cap 13 being disposed at the other end of the barrel 11.
As shown in fig. 1-2, the left end of the cylinder 11 is connected to the first end cap 12, the right end of the cylinder 11 is connected to the second end cap 13, and the first end cap 12 and the second end cap 13 close the chamber in the cylinder 11 to fix the pole shoe 4, the bearing 6 and the permanent magnet 5 in the chamber, so that the magnetic liquid sealing device has a better sealing effect.
In some embodiments, the magnetic fluid seal further comprises a spacer 8, the spacer 8 being fitted over the outside of the shaft 2 and located between the bearing 6 and the second end cap 13. As shown in fig. 1-2, the spacer 8 is located between the bearing 6 and the second end cap 13 to space the bearing 6 from the second end cap 13 to form a gap to allow the shaft sleeve 3 to slide left and right.
In some embodiments, the shaft sleeve 3 and the pole shoe 4 are made of magnetic conductive materials, and the magnetism isolating ring 7, the shell 1 and the distance sleeve 8 are made of non-magnetic conductive materials. The shaft sleeve 3 and the pole shoe 4 need to have good magnetic conductivity, so the magnetic sleeve is made of magnetic conductive materials, the magnetism isolating ring 7, the shell 1 and the spacer sleeve 8 easily affect the magnetic field of the permanent magnet 5, and the magnetic sleeve is made of non-magnetic conductive materials to prevent the sealing effect from being affected.
In some embodiments, the magnetic fluid sealing device further comprises an adjusting member 9, and the adjusting member 9 is connected to the shaft sleeve 3 and used for driving the shaft sleeve 3 to move along the axial direction of the rotating shaft 2 so as to adjust the position of the shaft sleeve 3. As shown in fig. 1-2, the shaft sleeve 3 is connected with an adjusting member 9, and the position of the shaft sleeve 3 on the rotating shaft 2 can be moved left and right by the action of the adjusting member 9.
In some embodiments, the rotating shaft 2 is provided with a flange 21, the flange 21 is provided with a through hole 211 penetrating along the axial direction of the rotating shaft 2, a threaded hole 32 is formed in the end surface of the shaft sleeve 3, and the adjusting member 9 is a bolt which passes through the through hole 211 and is fitted in the threaded hole 32. As shown in fig. 1-2, a flange 21 is provided at the right end of the rotating shaft 2, a through hole 211 penetrating left and right is provided on the flange 21, a bolt is inserted into the through hole 211, the left end of the bolt is fitted into a threaded hole 32 on the right end face of the shaft sleeve 3, and the length change of the bolt in the threaded hole 32 is changed by rotating the bolt, so that the shaft sleeve 3 moves left and right.
A magnetic fluid seal according to some specific examples of the invention is described below with reference to fig. 1-2.
The magnetic liquid sealing device comprises a shell 1, a rotating shaft 2, a shaft sleeve 3, an adjusting piece 9, a plurality of pole shoes 4, a permanent magnet 5, a bearing 6, a magnetism isolating ring 7 and a spacing sleeve 8.
As shown in fig. 1-2, the housing 1 has a chamber, the rotating shaft 2 is rotatably supported in the chamber through a bearing 6, a flange 21 is provided at the right end of the rotating shaft 2, a shaft sleeve 3 is sleeved outside the rotating shaft 2, the shaft sleeve 3 can move left and right along the rotating shaft 2, the right end of the shaft sleeve 3 is connected with the flange 21 through an adjusting member 9, and the adjusting member 9 can drive the shaft sleeve 3 to move left and right.
The outside of the shaft sleeve 3 is sleeved with a plurality of pole shoes 4, the pole shoes 4 are positioned in the cavity, permanent magnets 5 are arranged between adjacent pole shoes 4, and two sides of the adjacent pole shoes 4 are respectively provided with a magnetic isolation ring 7. The outer sides of the adjacent magnetism isolating rings 7 are provided with bearings 6, and the magnetism isolating rings 7, the pole shoes 4 and the permanent magnets 5 are all positioned between the two bearings 6. A plurality of pole teeth 41 are arranged on the inner circumferential surface of the pole shoe 4 at intervals along the left-right direction, a sealing gap is formed between the inner circumferential surface of the pole teeth 41 and the outer circumferential surface of the rotating shaft 2 at intervals in the up-down direction of the figure, magnetic liquid is contained in the sealing gap, and the magnetic liquid is adsorbed on the pole teeth 41.
As shown in fig. 1-2, the left end of the barrel 11 is connected to the first end cap 12, the right end of the barrel 11 is connected to the second end cap 13, and the first end cap 12 and the second end cap 13 close the chamber in the barrel 11. The spacer 8 is located between the bearing 6 and the second end cap 13 to space the bearing 6 from the second end cap 13 to form a gap to allow the shaft sleeve 3 to move left and right.
In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the 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," "secured," and the like are to be construed broadly and can, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. 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" and the like mean that a specific 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 above, 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 within the scope of the present invention.
Claims (10)
1. A magnetic fluid seal assembly, comprising:
a housing having a chamber therein;
the rotating shaft is rotatably arranged in the cavity;
the shaft sleeve is sleeved on the rotating shaft to rotate along with the rotating shaft;
the pole shoes are arranged at intervals in the axial direction of the rotating shaft and sleeved outside the shaft sleeve, the inner circumferential surfaces of the pole shoes are provided with a plurality of pole teeth extending along the circumferential direction of the pole shoes, the pole teeth are arranged at intervals in the axial direction of the pole shoes, the inner circumferential surfaces of the pole teeth and the outer circumferential surface of the shaft sleeve are spaced in the radial direction of the rotating shaft to form a sealing gap, and magnetic liquid adsorbed on the pole teeth is arranged in the sealing gap;
the permanent magnet is sleeved outside the rotating shaft and arranged between the adjacent pole shoes in the axial direction of the rotating shaft,
the outer peripheral surface of the shaft sleeve is provided with a circumferential groove, and the axial position of the shaft sleeve along the rotating shaft is adjustable so that the circumferential groove faces or deviates from the pole teeth of the pole shoe.
2. The magnetic fluid seal of claim 1, wherein said circumferential groove is plural and corresponds one-to-one to a plurality of said pole shoes.
3. The magnetic fluid seal apparatus of claim 1 wherein said shaft is rotatably supported by a plurality of bearings disposed within said chamber, a plurality of said pole pieces being located between adjacent ones of said bearings.
4. The magnetic fluid seal apparatus of claim 3, further comprising a magnetic isolation ring disposed outside said shaft sleeve and between said bearing and said pole piece adjacent to each other.
5. The magnetic liquid seal device according to claim 1, wherein a width of the circumferential groove in an axial direction of the rotating shaft is not smaller than a width of the pole shoe in the axial direction of the rotating shaft.
6. The magnetic fluid seal apparatus of claim 4, wherein said housing comprises a cylinder, a first end cap and a second end cap, said first end cap being disposed at one end of said cylinder, said second end cap being disposed at the other end of said cylinder.
7. The magnetic fluid seal apparatus of claim 6 further comprising a spacer sleeve disposed over said shaft and between said bearing and said second end cap.
8. The magnetic fluid seal apparatus of claim 7 wherein said bushing and said pole piece are made of magnetically conductive material, and said flux-isolating ring, said housing and said spacer are made of non-magnetically conductive material.
9. The magnetic fluid seal apparatus of any one of claims 1 to 8 further comprising an adjustment member connected to said bushing for driving said bushing to move axially along said shaft to adjust the position of said bushing.
10. The magnetic liquid sealing device according to claim 9, wherein the rotating shaft is provided with a flange, the flange is provided with a through hole which is through along the axial direction of the rotating shaft, a threaded hole is formed in an end surface of the shaft sleeve, the adjusting member is a bolt, and the bolt is fitted in the threaded hole through the through hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626792.5A CN112648382B (en) | 2020-12-31 | 2020-12-31 | Magnetic liquid sealing device |
| JP2021076872A JP6912138B1 (en) | 2020-12-31 | 2021-04-28 | Ferrofluidic seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626792.5A CN112648382B (en) | 2020-12-31 | 2020-12-31 | Magnetic liquid sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112648382A CN112648382A (en) | 2021-04-13 |
| CN112648382B true CN112648382B (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011626792.5A Active CN112648382B (en) | 2020-12-31 | 2020-12-31 | Magnetic liquid sealing device |
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| Country | Link |
|---|---|
| JP (1) | JP6912138B1 (en) |
| CN (1) | CN112648382B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757383B (en) * | 2021-09-07 | 2022-06-17 | 北京交通大学 | Magnetic fluid sealing device with multiple through-hole structure magnetic sources |
| CN114251367B (en) * | 2021-11-25 | 2023-10-27 | 广西科技大学 | A hybrid magnetic fluid sealing device for bearings |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01220776A (en) * | 1988-02-25 | 1989-09-04 | Nok Corp | Magnetic fluid sealing device |
| JPH07174241A (en) * | 1993-10-27 | 1995-07-11 | Nok Corp | Magnetic fluid seal |
| JPH1137304A (en) * | 1997-07-15 | 1999-02-12 | Nok Corp | Sealing device utilizing magnetic fluid |
| CN102182830A (en) * | 2011-05-05 | 2011-09-14 | 北京交通大学 | Rotary sealing device for magnetic liquid |
| CN102518811A (en) * | 2011-12-15 | 2012-06-27 | 北京交通大学 | Magnetic fluid sealing structure |
| CN110094509A (en) * | 2019-05-21 | 2019-08-06 | 北京空间飞行器总体设计部 | Magnet fluid sealing axis with heat-proof device |
| CN111963684A (en) * | 2019-09-12 | 2020-11-20 | 杨春花 | Combined cartridge type dynamic seal based on magnetic fluid |
-
2020
- 2020-12-31 CN CN202011626792.5A patent/CN112648382B/en active Active
-
2021
- 2021-04-28 JP JP2021076872A patent/JP6912138B1/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01220776A (en) * | 1988-02-25 | 1989-09-04 | Nok Corp | Magnetic fluid sealing device |
| JPH07174241A (en) * | 1993-10-27 | 1995-07-11 | Nok Corp | Magnetic fluid seal |
| JPH1137304A (en) * | 1997-07-15 | 1999-02-12 | Nok Corp | Sealing device utilizing magnetic fluid |
| CN102182830A (en) * | 2011-05-05 | 2011-09-14 | 北京交通大学 | Rotary sealing device for magnetic liquid |
| CN102518811A (en) * | 2011-12-15 | 2012-06-27 | 北京交通大学 | Magnetic fluid sealing structure |
| CN110094509A (en) * | 2019-05-21 | 2019-08-06 | 北京空间飞行器总体设计部 | Magnet fluid sealing axis with heat-proof device |
| CN111963684A (en) * | 2019-09-12 | 2020-11-20 | 杨春花 | Combined cartridge type dynamic seal based on magnetic fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6912138B1 (en) | 2021-07-28 |
| CN112648382A (en) | 2021-04-13 |
| JP2022105253A (en) | 2022-07-13 |
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