CN108799507B - Multi-magnetic-source sleeve type magnetic fluid sealing device - Google Patents
Multi-magnetic-source sleeve type magnetic fluid sealing device Download PDFInfo
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- CN108799507B CN108799507B CN201811069324.5A CN201811069324A CN108799507B CN 108799507 B CN108799507 B CN 108799507B CN 201811069324 A CN201811069324 A CN 201811069324A CN 108799507 B CN108799507 B CN 108799507B
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- 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
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Abstract
The invention relates to a multi-magnetic-source sleeve-type magnetic fluid sealing device which consists of more than one magnetic fluid sealing unit, wherein the magnetic fluid sealing unit comprises a shell, a left pole shoe ring, a right pole shoe ring, a sleeve, a left one-body permanent magnet ring, a left two-body permanent magnet ring, a middle permanent magnet ring, a right one-body permanent magnet ring and a right two-body permanent magnet ring; the invention can solve the problem of low pressure resistance of the existing single-magnetic-source magnetic fluid sealing device, and has the advantages of simple processing and convenient assembly, thereby successfully applying the sealing technology to the fields of high speed and heavy load and the like.
Description
Technical Field
The invention belongs to the field of mechanical engineering sealing, and particularly relates to a multi-magnetic-source sleeve type magnetic fluid sealing device.
Background
With the development of economy, vacuum equipment at home and abroad develops rapidly. The magnetic fluid sealing technology is widely applied to a plurality of rotary dynamic sealing devices, such as sealing of vacuum equipment, sealing of high-temperature and high-pressure equipment and sealing of equipment with higher requirements on environment, and good economic benefits are obtained in order to improve the product quality. However, with the increase of the sealing clearance, the sealing capability is gradually reduced and even fails, so that the problem of improving the pressure resistance of the magnetic fluid seal under the large clearance is the current hot problem.
Therefore, by improving the magnetic fluid seal structure as a method for improving the pressure resistance of the magnetic fluid seal under a large gap, the seal device as described in the reference (patent publication No. CN 103115152 a), although the seal device described in the above document is greatly improved in the sealing performance with respect to the ordinary magnetic fluid, there is room for further improvement in the sealing performance of the existing seal structure.
The magnetic fluid seal is characterized in that the magnetic fluid is firmly fixed in the seal gap by utilizing the magnetic field force generated by the permanent magnet in the seal gap to resist the pressure difference at two sides, thereby achieving the sealing effect.
Disclosure of Invention
The invention aims to provide a magnetic source split sleeve type magnetic fluid sealing device, so that the problem of low pressure resistance of the conventional single-magnetic source magnetic fluid sealing device is solved, the sealing device is simple to process and convenient to assemble, and the sealing technology is successfully applied to the fields of high speed and heavy load and the like.
The technical scheme of the invention is as follows:
the multi-magnetic source sleeve type magnetic fluid sealing device comprises a shell, wherein the shell consists of more than one magnetic fluid sealing unit, and the magnetic fluid sealing unit comprises a left pole shoe ring, a right pole shoe ring, a sleeve, a left permanent magnet ring, a right permanent magnet ring, a middle permanent magnet ring, a right permanent magnet ring and a right permanent magnet ring;
the sleeve is arranged on the shaft in a threaded connection mode, and the outer circular surface of the sleeve is divided into a left sleeve surface, a left groove surface, a middle circular surface, a right sleeve surface and a right groove surface; the left sleeve surface and the left groove surface are alternately arranged on the left side of the middle circular surface, and the right sleeve surface and the right groove surface are alternately arranged on the right side of the middle circular surface;
the left pole shoe ring, the right pole shoe ring and the intermediate permanent magnet ring are arranged on the inner wall of the shell, and the right pole shoe ring is positioned between the left pole shoe ring and the right pole shoe ring and is respectively contacted with the left pole shoe ring and the right pole shoe ring;
the inner circle surface of the left pole shoe ring is divided into a left first pole shoe surface and a left second pole shoe surface, and the left first pole shoe surface and the left second pole shoe surface are alternately arranged; the left polar shoe surface corresponds to the left sleeve surface and keeps a distance, and the left dipolar shoe surface corresponds to the left groove surface and keeps a distance;
the inner circular surface of the right pole shoe ring is divided into a right first pole shoe surface and a right second pole shoe surface, and the right first pole shoe surface and the right second pole shoe surface are alternately arranged; the right polar shoe surface corresponds to the right sleeve surface and keeps a distance, and the right dipolar shoe surface corresponds to the right groove surface and keeps a distance; the inner circle surface of the middle circular surface corresponds to the outer circle surface of the middle permanent magnet ring;
the left sleeve is provided with a ring groove I, the left permanent magnet ring is arranged in the ring groove I, the outer circular surface of the left permanent magnet ring extends to the left pole shoe surface along the radial direction, a gap is reserved between the outer circular surface and the left pole shoe surface, and the gap is filled with magnetic fluid for sealing;
the left groove surface is provided with a ring groove II, the left two permanent magnets are annularly arranged in the ring groove II, the outer circular surface of the left two permanent magnet ring radially extends towards the left two pole shoe surface, a gap is reserved between the outer circular surface and the left two pole shoe surface, and the gap is filled with magnetic fluid for sealing;
the right sleeve surface is provided with a ring groove III, the right permanent magnet ring is arranged in the ring groove III, the outer circular surface of the right permanent magnet ring extends to the right pole shoe surface along the radial direction, a gap is reserved between the outer circular surface and the right pole shoe surface, and the gap is filled with magnetic fluid for sealing;
and a ring groove IV is formed in the right groove surface, the right two permanent magnet rings are arranged in the ring groove IV, the outer circular surface of the right two permanent magnet rings extends to the right two pole shoe surface along the radial direction, a gap is reserved between the outer circular surface of the right two permanent magnet rings and the right two pole shoe surface, and the gap is filled with magnetic fluid for sealing.
The magnetic fluid sealing unit is provided with 1-5 groups.
1-6 groups of the left groove surface are arranged; the right groove surface is provided with 1-6 groups.
The height of the left groove surface in the radial direction is smaller than that of the left sleeve surface in the radial direction, and the height of the left sleeve surface in the radial direction is smaller than that of the middle circular surface in the radial direction;
the height of the right groove surface in the radial direction is smaller than that of the right sleeve surface in the radial direction, and the height of the right sleeve surface in the radial direction is smaller than that of the middle circular surface in the radial direction.
The radial height of the left polar shoe surface is less than that of the left polar shoe surface; the height of the right polar shoe surface in the radial direction is smaller than that of the right polar shoe surface in the radial direction.
The size of a gap between the outer circular surface of the left permanent magnet ring and the left pole shoe surface is 0.05-3 mm; the size of a gap between the left two permanent magnet rings and the left two-pole shoe surface is 0.05-3 mm; the size of a gap between the right permanent magnet ring and the right pole shoe surface is 0.05-3 mm; the size of the gap between the two right permanent magnet rings and the two right pole shoe surface is 0.05-3 mm.
The left permanent magnet ring, the left two permanent magnet rings, the right one permanent magnet ring and the right two permanent magnet rings are radial magnetizing permanent magnets; the magnetic force lines of the left permanent magnet ring and the left permanent magnet ring are in the same direction, the magnetic force lines of the right permanent magnet ring and the right permanent magnet ring are in the same direction, and the directions of the magnetic force lines of the left permanent magnet ring and the right permanent magnet ring are opposite; the middle permanent magnet ring is an axial magnetizing permanent magnet.
The outer circular surfaces of the left pole shoe ring and the right pole shoe ring are provided with grooves, and sealing rings are arranged in the grooves.
The multi-magnetic-source sleeve type magnetic fluid sealing device also comprises a left magnetism isolating ring and a right magnetism isolating ring; the left magnetism isolating ring and the right magnetism isolating ring are arranged on the inner wall of the shell, the left magnetism isolating ring is located on the left side of the left pole shoe ring, and the right magnetism isolating ring is located on the right side of the right pole shoe ring.
The multi-magnetic-source sleeve-type magnetic fluid sealing device further comprises a left bearing and a right bearing, wherein the left bearing and the right bearing are respectively sleeved on the shaft, and the left bearing is arranged on the left side of the left magnetism isolating ring and is in contact with the left magnetism isolating ring; the right bearing is arranged on the right side of the right magnetism isolating ring and is in contact with the right magnetism isolating ring.
The sleeve is radially provided with a plurality of grooves, the radially magnetized permanent magnets are embedded into the grooves in a split mode, the permanent magnet ring is placed in the groove of the sleeve and can be composed of a plurality of split permanent magnets, and then magnetic fluid is injected into a sealing gap formed by each permanent magnet and a pole shoe, so that a good closed loop is formed, and the magnetic source split sleeve type magnetic fluid sealing structure is formed. The sealing structure increases the magnetic flux density in the sealing magnetic loop, greatly improves the sealing pressure resistance of the magnetic fluid, overcomes the problem that the existing sealing device can not meet the requirement of high sealing performance under special working conditions such as high speed and heavy load, greatly reduces the loss of the magnetic fluid when the sealing fails, increases the self-repairing capability of the magnetic fluid seal, and effectively improves the pressure resistance and the sealing reliability of the magnetic fluid seal under the condition of large gap.
The invention adopts the technical scheme that the left permanent magnet ring, the left two permanent magnet rings, the right one permanent magnet ring and the right two permanent magnet rings are radial magnetizing permanent magnets, the directions of magnetic lines of the left one permanent magnet ring and the left two permanent magnet rings are the same, the directions of magnetic lines of the right one permanent magnet ring and the right two permanent magnet rings are the same, and the directions of the magnetic lines of the left one permanent magnet ring and the right one permanent magnet ring are opposite; the middle permanent magnet ring is an axial magnetizing permanent magnet, so that the formation of a magnetic loop is ensured, and the magnetic fluid can be more stably arranged in the corresponding gap.
Drawings
FIG. 1 is a schematic structural diagram of a multi-magnetic source sleeve type magnetic fluid sealing device provided by an embodiment of the invention;
the serial number designations and corresponding designations in the drawings are as follows:
1-shaft, 2-shell, 3-left pole shoe ring, 4-right pole shoe ring, 5-sleeve, 6-left permanent magnet ring, 7-left two permanent magnet rings, 8-middle permanent magnet ring, 9-right one permanent magnet ring, 10-right two permanent magnet rings, 11-sealing ring, 12-left magnetism isolating ring, 13-right magnetism isolating ring, 14-left bearing, 15-right bearing and 16-end cover.
31-left polar shoe face, 32-left dipolar shoe face;
41-right first pole shoe face, 42-right second pole shoe face;
51-left sleeve side, 52-left groove side, 53-middle circular side, 54-right sleeve side, and 55-right groove side.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the multiple magnetic source sleeve type magnetic fluid sealing device comprises a housing 2, which is composed of more than one magnetic fluid sealing unit, wherein the magnetic fluid sealing unit comprises a left pole shoe ring 3, a right pole shoe ring 4, a sleeve 5, a left permanent magnet ring 6, a left permanent magnet ring 7, a middle permanent magnet ring 8, a right permanent magnet ring 9 and a right permanent magnet ring 10;
the sleeve 5 is sleeved on the shaft 1, and the outer circular surface of the sleeve 5 is divided into a left sleeve surface 51, a left groove surface 52, a middle circular surface 53, a right sleeve surface 54 and a right groove surface 55; the left sleeve surface 51 and the left groove surface 52 are alternately arranged on the left side of the middle circular surface 53, and the right sleeve surface 54 and the right groove surface 55 are alternately arranged on the right side of the middle circular surface 53;
the left pole shoe ring 3, the right pole shoe ring 4 and the intermediate permanent magnet ring 8 are arranged on the inner wall of the shell 2, and the right pole shoe ring 4 is positioned between the left pole shoe ring 3 and the right pole shoe ring 4 and is respectively contacted with the left pole shoe ring 3 and the right pole shoe ring 4;
the inner circle surface of the left pole shoe ring 3 is divided into a left pole shoe surface 31 and a left pole shoe surface 32, and the left pole shoe surface 31 and the left pole shoe surface 32 are alternately arranged; the left polar shoe surface 31 corresponds to the left sleeve surface 51 and keeps a distance, and the left polar shoe surface 32 corresponds to the left groove surface 52 and keeps a distance;
the inner circular surface of the right pole shoe ring 4 is divided into a right first pole shoe surface 41 and a right second pole shoe surface 42, and the right first pole shoe surface 41 and the right second pole shoe surface 42 are alternately arranged; the right polar shoe surface 41 corresponds to and keeps a distance with the right sleeve surface 54, and the right polar shoe surface 42 corresponds to and keeps a distance with the right groove surface 55; the inner circle surface of the middle round surface 53 corresponds to the outer circle surface of the middle permanent magnet ring 8;
the left sleeve surface 51 is provided with a ring groove I, the left permanent magnet ring 6 is arranged in the ring groove I, the outer circular surface of the left permanent magnet ring 6 extends to the left pole shoe surface 31 along the radial direction, a gap is reserved between the outer circular surface and the left pole shoe surface 31, and the gap is filled with magnetic fluid for sealing;
the left groove surface 52 is provided with a ring groove II, the left two permanent magnet rings 7 are arranged in the ring groove II, the outer circular surface of the left two permanent magnet rings 7 extends to the left two-pole shoe surface 32 along the radial direction, a gap is reserved between the left two-pole shoe surface 32 and the gap, and the gap is filled with magnetic fluid for sealing;
the right sleeve surface 54 is provided with a ring groove III, the right permanent magnet ring 9 is arranged in the ring groove III, the outer circular surface of the right permanent magnet ring 9 extends to the right pole shoe surface 41 along the radial direction, a gap is left between the right permanent magnet ring and the right pole shoe surface 41, and the gap is filled with magnetic fluid for sealing;
the right groove surface 55 is provided with a ring groove IV, the right two permanent magnet rings 10 are arranged in the ring groove IV, the outer circular surface of the right two permanent magnet rings 10 extends to the right two-pole shoe surface 42 along the radial direction, a gap is reserved between the outer circular surface and the right two-pole shoe surface 42, and the gap is filled with magnetic fluid for sealing.
The magnetic fluid sealing unit is provided with 1-5 groups.
The left groove surface 52 is provided with 1-6 groups; the right groove surface 55 is provided with 1-6 groups.
The height of the left groove surface 52 in the radial direction is smaller than that of the left sleeve surface 51 in the radial direction, and the height of the left sleeve surface 51 in the radial direction is smaller than that of the middle circular surface 53 in the radial direction;
the height of the right groove surface 55 in the radial direction is smaller than that of the right sleeve surface 54 in the radial direction, and the height of the right sleeve surface 54 in the radial direction is smaller than that of the middle circular surface 53 in the radial direction.
The radial height of the left polar shoe surface 31 is smaller than that of the left polar shoe surface 32; the radial height of the right pole shoe face 41 is less than the radial height of the right pole shoe face 42.
The size of a gap between the outer circular surface of the left permanent magnet ring 6 and the left pole shoe surface 31 is 0.05-3 mm; the size of a gap between the left two permanent magnet rings 7 and the left two-pole shoe surface 32 is 0.05-3 mm; the size of a gap between the right permanent magnet ring 9 and the right pole shoe surface 41 is 0.05-3 mm; the size of the gap between the right two permanent magnet rings 10 and the right two pole shoe surface 42 is 0.05-3 mm.
The left permanent magnet ring 6, the left permanent magnet rings 7, the right permanent magnet ring 9 and the right permanent magnet rings 10 are all radial magnetizing permanent magnets; the directions of the magnetic lines of the left permanent magnet ring 6 and the left permanent magnet ring 7 are the same, the directions of the magnetic lines of the right permanent magnet ring 9 and the right permanent magnet ring 10 are the same, and the directions of the magnetic lines of the left permanent magnet ring 6 and the right permanent magnet ring 9 are opposite; the middle permanent magnet ring 8 is an axial magnetizing permanent magnet.
Grooves are arranged on the outer circular surfaces of the left pole shoe ring 3 and the right pole shoe ring 4, and sealing rings 11 are arranged in the grooves.
The multi-magnetic source sleeve type magnetic fluid sealing device also comprises a left magnetism isolating ring 12 and a right magnetism isolating ring 13; the left magnetism isolating ring 12 and the right magnetism isolating ring 13 are arranged on the inner wall of the shell 2, the left magnetism isolating ring 12 is positioned on the left side of the left pole shoe ring 3, and the right magnetism isolating ring 13 is positioned on the right side of the right pole shoe ring 4.
The multi-magnetic-source sleeve-type magnetic fluid sealing device further comprises a left bearing 14 and a right bearing 15, wherein the left bearing 14 and the right bearing 15 are respectively sleeved on the shaft 1, and the left bearing 14 is arranged on the left side of the left magnetism isolating ring 12 and is in contact with the left magnetism isolating ring 12; the right bearing 15 is arranged on the right side of the right magnetism isolating ring 13 and is in contact with the right magnetism isolating ring 13.
Claims (7)
1. A multi-magnetic-source sleeve type magnetic fluid sealing device comprises a shell (2), and is characterized in that:
the magnetic fluid sealing unit comprises a left pole shoe ring (3), a right pole shoe ring (4), a sleeve (5), a left one-body permanent magnet ring (6), a left two-body permanent magnet ring (7), a middle permanent magnet ring (8), a right one-body permanent magnet ring (9) and a right two-body permanent magnet ring (10);
the sleeve (5) is arranged on the shaft (1) in a threaded connection mode, and the outer circular surface of the sleeve (5) is divided into a left sleeve surface (51), a left groove surface (52), a middle circular surface (53), a right sleeve surface (54) and a right groove surface (55); the left sleeve surface (51) and the left groove surface (52) are alternately arranged on the left side of the middle circular surface (53), and the right sleeve surface (54) and the right groove surface (55) are alternately arranged on the right side of the middle circular surface (53);
the left pole shoe ring (3), the right pole shoe ring (4) and the intermediate permanent magnet ring (8) are arranged on the inner wall of the shell (2), and the right pole shoe ring (4) is positioned between the left pole shoe ring (3) and the right pole shoe ring (4) and is respectively contacted with the left pole shoe ring (3) and the right pole shoe ring (4);
the inner circle surface of the left pole shoe ring (3) is divided into a left first pole shoe surface (31) and a left second pole shoe surface (32), and the left first pole shoe surface (31) and the left second pole shoe surface (32) are alternately arranged; the left polar shoe surface (31) corresponds to the left sleeve surface (51) and keeps a distance, and the left polar shoe surface (32) corresponds to the left groove surface (52) and keeps a distance;
the inner circle surface of the right pole shoe ring (4) is divided into a right first pole shoe surface (41) and a right second pole shoe surface (42), and the right first pole shoe surface (41) and the right second pole shoe surface (42) are alternately arranged; the right polar shoe surface (41) corresponds to the right sleeve surface (54) and keeps a distance, and the right polar shoe surface (42) corresponds to the right groove surface (55) and keeps a distance; the inner circle surface of the middle circular surface (53) corresponds to the outer circle surface of the middle permanent magnet ring (8);
the left sleeve surface (51) is provided with a ring groove I, the left permanent magnet ring (6) is arranged in the ring groove I, the outer circular surface of the left permanent magnet ring (6) extends to the left pole shoe surface (31) along the radial direction, a gap is reserved between the left permanent magnet ring and the left pole shoe surface (31), and the gap is filled with magnetic fluid for sealing;
the left groove surface (52) is provided with a ring groove II, the left two permanent magnet rings (7) are arranged in the ring groove II, the outer circular surface of the left two permanent magnet rings (7) radially extends towards the left two-pole shoe surface (32), a gap is reserved between the left two-pole shoe surface and the left two-pole shoe surface (32), and the gap is filled with magnetic fluid for sealing;
the right sleeve surface (54) is provided with a ring groove III, the right permanent magnet ring (9) is arranged in the ring groove III, the outer circular surface of the right permanent magnet ring (9) extends to the right pole shoe surface (41) along the radial direction, a gap is reserved between the right permanent magnet ring and the right pole shoe surface (41), and the gap is filled with magnetic fluid for sealing;
a ring groove IV is formed in the right groove surface (55), the right two permanent magnet rings (10) are arranged in the ring groove IV, the outer circular surfaces of the right two permanent magnet rings (10) extend to the right two-pole shoe surface (42) along the radial direction, a gap is reserved between the right two-pole shoe surface and the right two-pole shoe surface (42), and magnetic fluid is filled in the gap for sealing;
the height of the left groove surface (52) in the radial direction is smaller than that of the left sleeve surface (51), and the height of the left sleeve surface (51) in the radial direction is smaller than that of the middle circular surface (53) in the radial direction;
the height of the right groove surface (55) in the radial direction is smaller than that of the right sleeve surface (54), and the height of the right sleeve surface (54) in the radial direction is smaller than that of the middle circular surface (53);
the height of the left polar shoe surface (31) in the radial direction is smaller than that of the left polar shoe surface (32) in the radial direction; the height of the right polar shoe surface (41) in the radial direction is smaller than that of the right polar shoe surface (42) in the radial direction;
the left permanent magnet ring (6), the left permanent magnet ring (7), the right permanent magnet ring (9) and the right permanent magnet ring (10) are all radial magnetizing permanent magnets; the magnetic force lines of the left permanent magnet ring (6) and the left permanent magnet ring (7) have the same direction, the magnetic force lines of the right permanent magnet ring (9) and the right permanent magnet ring (10) have the same direction, and the magnetic force lines of the left permanent magnet ring (6) and the right permanent magnet ring (9) have opposite directions; the middle permanent magnet ring (8) is an axial magnetizing permanent magnet.
2. The multiple magnetic source sleeve-type magnetic fluid seal device of claim 1, wherein: the magnetic fluid sealing unit is provided with 1-5 groups.
3. The multiple magnetic source sleeve-type magnetic fluid seal device of claim 1, wherein: 1-6 groups of the left groove surface (52) are arranged; the right groove surface (55) is provided with 1-6 groups.
4. The multiple magnetic source sleeve-type magnetic fluid seal device of claim 1, wherein: the size of a gap between the outer circular surface of the left-integrated permanent magnet ring (6) and the left-electrode shoe surface (31) is 0.05-3 mm; the size of a gap between the left two permanent magnet rings (7) and the left two-pole shoe surface (32) is 0.05-3 mm; the size of a gap between the right permanent magnet ring (9) and the right pole shoe surface (41) is 0.05-3 mm; the size of the gap between the right two permanent magnet rings (10) and the right two-pole shoe surface (42) is 0.05-3 mm.
5. The multiple magnetic source sleeve-type magnetic fluid seal device of claim 1, wherein: the outer circular surfaces of the left pole shoe ring (3) and the right pole shoe ring (4) are provided with grooves, and sealing rings (11) are arranged in the grooves.
6. The multiple magnetic source sleeve-type magnetic fluid seal device of claim 1, wherein: the magnetic field isolation device also comprises a left magnetic isolation ring (12) and a right magnetic isolation ring (13); the left magnetism isolating ring (12) and the right magnetism isolating ring (13) are arranged on the inner wall of the shell (2), the left magnetism isolating ring (12) is located on the left side of the left pole shoe ring (3), and the right magnetism isolating ring (13) is located on the right side of the right pole shoe ring (4).
7. The multiple magnetic source sleeve-type magnetic fluid seal device of claim 1, wherein: the shaft is characterized by further comprising a left bearing (14) and a right bearing (15), wherein the left bearing (14) and the right bearing (15) are respectively sleeved on the shaft (1), and the left bearing (14) is arranged on the left side of the left magnetism isolating ring (12) and is in contact with the left magnetism isolating ring (12); the right bearing (15) is arranged on the right side of the right magnetism isolating ring (13) and is in contact with the right magnetism isolating ring (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069324.5A CN108799507B (en) | 2018-09-13 | 2018-09-13 | Multi-magnetic-source sleeve type magnetic fluid sealing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069324.5A CN108799507B (en) | 2018-09-13 | 2018-09-13 | Multi-magnetic-source sleeve type magnetic fluid sealing device |
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| CN108799507A CN108799507A (en) | 2018-11-13 |
| CN108799507B true CN108799507B (en) | 2020-12-18 |
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| CN201811069324.5A Active CN108799507B (en) | 2018-09-13 | 2018-09-13 | Multi-magnetic-source sleeve type magnetic fluid sealing device |
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| CN109282041B (en) * | 2018-11-19 | 2023-09-29 | 广西科技大学 | Multi-magnetic series-parallel magnetic fluid sealing device |
| CN110906009A (en) * | 2019-12-13 | 2020-03-24 | 湖南铁路科技职业技术学院 | Series-parallel sleeve type magnetic fluid sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1271358C (en) * | 2003-12-10 | 2006-08-23 | 北京交通大学 | Sealing device with uniformly distributed magnetic liquid |
| PL221563B1 (en) * | 2011-12-08 | 2016-04-29 | Akademia Górniczo Hutnicza Im Stanisława Staszica W Krakowie | Multistage sealing using a magnetic fluid |
| CN102537367B (en) * | 2012-01-12 | 2014-12-03 | 北京理工大学 | Shaft sealing device with magnetic fluids |
| CN106090238B (en) * | 2016-08-15 | 2018-01-12 | 广西科技大学 | A kind of staggered device for sealing magnetic fluid of split-type |
| CN108087561B (en) * | 2017-12-13 | 2020-05-05 | 广西科技大学 | Mixed type magnetic source magnetic fluid sealing device |
| CN107956881B (en) * | 2017-12-13 | 2023-05-02 | 广西科技大学 | Staggered magnetic fluid sealing device |
| CN108006230B (en) * | 2017-12-13 | 2020-05-05 | 广西科技大学 | Mixed type magnetic fluid sealing device |
| CN108468811A (en) * | 2018-02-11 | 2018-08-31 | 广西科技大学 | A kind of magnetic fluid sealing structure |
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