CN108799506B - Multi-magnetic source symmetrical magnetic fluid sealing device - Google Patents
Multi-magnetic source symmetrical magnetic fluid sealing device Download PDFInfo
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- CN108799506B CN108799506B CN201811017111.8A CN201811017111A CN108799506B CN 108799506 B CN108799506 B CN 108799506B CN 201811017111 A CN201811017111 A CN 201811017111A CN 108799506 B CN108799506 B CN 108799506B
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- 238000007789 sealing Methods 0.000 title claims abstract description 68
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 60
- 230000005389 magnetism Effects 0.000 claims description 44
- 238000002955 isolation Methods 0.000 claims description 19
- 230000004323 axial length Effects 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000004907 flux Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to a multi-magnetic source symmetrical magnetic fluid sealing device which comprises more than one magnetic fluid sealing unit, wherein the magnetic fluid sealing unit comprises a shell, a left pole shoe ring I, a left pole shoe ring II, a middle pole shoe ring I, a middle pole shoe ring II, a right pole shoe ring I and a right pole shoe ring II, a permanent magnet ring I and a permanent magnet ring II. The invention aims to solve the problem of lower pressure resistance of the existing sealing device, so that the sealing technology is successfully applied to the fields of high speed, 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 symmetrical magnetic fluid sealing device.
Background
When the magnetic fluid sealing technology is applied to a high-speed heavy-load sealing environment, the pressure resistance of the sealing device is reduced due to the loss of magnetic fluid, and meanwhile, the magnetic fluid in the sealing gap often fails due to the overlarge sealing gap, so that the improvement of the pressure resistance of the large-gap magnetic fluid sealing is one of hot problems in the current research.
One of the methods of improving the pressure resistance of the magnetic fluid seal under large gaps is by improving the magnetic fluid seal structure as a seal device described in comparative document 1 (patent publication No. CN 103115152 a). Although the sealing performance of the sealing device is greatly improved compared with that of common magnetic fluid, the sealing performance still cannot meet the high sealing performance requirements of special working conditions such as high speed, heavy load and the like.
Disclosure of Invention
The invention aims to provide a multi-magnetic source symmetrical magnetic fluid sealing device, so that the problem of low pressure resistance of the existing sealing device is solved, and the sealing technology is successfully applied to the fields of high speed, heavy load and the like.
The technical scheme of the invention is as follows:
the multi-magnetic source symmetrical magnetic fluid sealing device comprises a shell and is composed of more than one magnetic fluid sealing unit, wherein the magnetic fluid sealing unit comprises a left pole shoe ring I, a left pole shoe ring II, a middle pole shoe ring I, a middle pole shoe ring II, a right pole shoe ring I, a right pole shoe ring II, a permanent magnet ring I and a permanent magnet ring II;
the left pole shoe ring I, the middle pole shoe ring I and the right pole shoe ring I are sleeved on the shaft at intervals, a permanent magnet ring I is arranged between the left pole shoe ring I and the right pole shoe ring I of the middle pole shoe ring I, and the permanent magnet ring I is sleeved on the shaft;
the left pole shoe ring II, the middle pole shoe ring II and the right pole shoe ring II are arranged on the inner wall of the shell, a permanent magnet ring II is arranged among the left pole shoe ring II, the middle pole shoe ring II and the right pole shoe ring II, and the right pole shoe ring II is arranged on the inner wall of the shell;
the radial heights of the left pole shoe ring I and the right pole shoe ring I are the same as those of the permanent magnet ring I, and the radial height of the middle pole shoe ring I is higher than that of the permanent magnet ring I; the radial height of the middle pole shoe ring II is higher than that of the permanent magnet ring II, and the radial heights of the left pole shoe ring II and the right pole shoe ring II are higher than that of the middle pole shoe ring II;
the axial length of the left pole shoe ring II is greater than that of the left pole shoe ring I and less than the sum of the axial lengths of the left pole shoe ring I and the permanent magnet ring I; the axial length of the right pole shoe ring II is greater than that of the right pole shoe ring I and less than the sum of the axial lengths of the right pole shoe ring I and the permanent magnet ring II; the axial length of the middle pole shoe ring I is greater than that of the middle pole shoe ring II;
the part of the inner circular surface of the left pole shoe ring II corresponding to the outer circular surface of the left pole shoe ring I is provided with pole teeth I, the pole teeth I extend towards the outer circular surface of the left pole shoe ring I along the radial direction, a gap is reserved between the pole teeth I and the outer circular surface of the left pole shoe ring I, and magnetic fluid is filled in the gap for sealing;
the part of the inner circular surface of the right pole shoe ring II corresponding to the outer circular surface of the right pole shoe ring I is provided with a pole tooth II, the pole tooth II extends towards the outer circular surface of the right pole shoe ring I along the radial direction, a gap is reserved between the pole tooth II and the outer circular surface of the right pole shoe ring I, and magnetic fluid is filled in the gap for sealing;
the inner circular surface of the middle pole shoe ring II is provided with pole teeth III, the pole teeth III extend towards the outer circular surface of the middle pole shoe ring I along the radial direction, a gap is reserved between the pole teeth III and the outer circular surface of the middle pole shoe ring I, and magnetic fluid is filled in the gap for sealing.
The magnetic fluid sealing unit is provided with 1-5 groups and is distributed along the axial direction of the shaft.
The number of the pole teeth I arranged on the inner circular surface of the left pole shoe ring II is 1-5; the number of the pole teeth II arranged on the inner circular surface of the right pole shoe ring II is 1-5.
The number of the pole teeth III arranged on the inner circular surface of the middle pole shoe ring II is 2-10.
The size of a gap between the pole tooth I1 and the outer circular surface of the left pole shoe ring I is 0.05-3 mm; the size of a gap between the pole tooth II and the outer circular surface of the right pole shoe ring I is 0.05-3 mm; the gap between the pole tooth III and the outer circular surface of the middle pole shoe ring I is 0.05-3 mm.
The permanent magnet ring I and the permanent magnet ring II are axial magnetizing permanent magnets.
The magnetic force lines between two adjacent permanent magnet rings I of the multi-magnetic source symmetrical magnetic fluid sealing device are opposite in direction; the magnetic force lines between two adjacent permanent magnet rings II are opposite in direction; in each magnetic fluid sealing unit, the magnetic force lines of the permanent magnet ring I and the permanent magnet ring II on the left side are opposite in direction, and the magnetic force lines of the permanent magnet ring I and the permanent magnet ring II on the right side are opposite in direction.
Grooves are formed in the outer circular surfaces of the left pole shoe ring II and the right pole shoe ring II, and sealing rings are arranged in the grooves.
The multi-magnetic source symmetrical magnetic fluid sealing device also comprises a left magnetic isolation ring, a right magnetic isolation ring and a right magnetic isolation ring; the left magnetism isolating ring and the right magnetism isolating ring are sleeved on the shaft, the left magnetism isolating ring is positioned at the left side of the left pole shoe ring I, and the right magnetism isolating ring is positioned at the right side of the right pole shoe ring I; the left magnetic isolation ring and the right magnetic isolation ring are arranged on the inner wall of the shell, the left magnetic isolation ring is positioned on the left side of the left pole shoe ring II, and the right magnetic isolation ring is positioned on the right side of the right pole shoe ring II.
The multi-magnetic source symmetrical magnetic fluid sealing device further comprises a left bearing and a right bearing; the left bearing and the right bearing are respectively sleeved on the shaft, and the left bearing is arranged at the left side of the left first magnetism isolating ring and the left second magnetism isolating ring and is respectively contacted with the left first magnetism isolating ring and the left second magnetism isolating ring; the right bearing is arranged on the right side of the right first magnetism isolating ring and the right second magnetism isolating ring and is respectively contacted with the right first magnetism isolating ring and the right second magnetism isolating ring.
According to the invention, the symmetrical pole shoes are designed, the pole teeth on the pole shoes are designed in the radial direction, and magnetic fluid is injected into radial sealing gaps formed between different pole shoes, so that the multi-magnetic-source symmetrical magnetic fluid sealing device is realized.
The invention uses the radial height relationship among the left pole shoe ring I, the right pole shoe ring I, the permanent magnet ring I, the middle pole shoe ring II, the permanent magnet ring II, the left pole shoe ring II and the right pole shoe ring II. The axial length relation among the left pole shoe ring II, the left pole shoe ring I, the permanent magnet ring I, the right pole shoe ring II, the right pole shoe ring I, the permanent magnet ring II, the middle pole shoe ring I and the middle pole shoe ring II forms a space three-dimensional structure, which can be beneficial to reducing magnetic leakage and improving magnetic energy product of a magnetic circuit; and the middle pole shoe ring I and the middle pole shoe ring II can also form a shorter magnetic fluid sealing loop with the adjacent permanent magnet rings, so that the pressure resistance and reliability of the magnetic fluid sealing are improved, and the self-repairing capability of the magnetic fluid sealing device is also improved.
The invention solves the problem that the existing sealing device cannot realize the high sealing performance requirements of special working conditions such as high speed, heavy load and the like, adopts the symmetrical structure design of multiple magnetic sources, increases the magnetic flux in a magnetic circuit, reduces the loss of magnetic fluid when the sealing fails, improves the pressure resistance and the sealing reliability of the magnetic fluid under the condition of large clearance, and expands the safe working range of the sealing device. And meanwhile, a non-magnetic permeability shaft can be adopted, so that the magnetic flux in the magnetic circuit is further increased, and the loss of magnetic fluid during sealing failure is reduced.
Drawings
FIG. 1 is a schematic diagram of a multi-magnetic source symmetrical magnetic fluid sealing device according to an embodiment of the present invention;
the numbers in the figures are marked and the corresponding names are as follows:
1-shaft, 2-shell, 3-left pole shoe ring I, 4-left pole shoe ring II, 5-middle pole shoe ring I, 6-middle pole shoe ring II, 7-right pole shoe ring I, 8-right pole shoe ring II, 9-permanent magnet ring I, 10-permanent magnet ring II, 11-pole tooth I, 12-pole tooth II, 13-pole tooth III, 14-sealing ring, 15-left magnetic isolation ring, 16-left magnetic isolation ring, 17-right magnetic isolation ring, 18-right magnetic isolation ring, 19-left bearing and 20-right bearing.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in FIG. 1, the multi-magnetic source symmetrical magnetic fluid sealing device comprises a shell 2 and more than one magnetic fluid sealing unit, wherein the magnetic fluid sealing unit comprises a left pole shoe ring I3, a left pole shoe ring II4, a middle pole shoe ring I5, a middle pole shoe ring II6, a right pole shoe ring I7, a right pole shoe ring II8, a permanent magnet ring I9 and a permanent magnet ring II10;
the left pole shoe ring I3, the middle pole shoe ring I5 and the right pole shoe ring I7 are sleeved on the shaft 1 at intervals, a permanent magnet ring I9 is arranged between the left pole shoe ring I3 and the right pole shoe ring I7 of the middle pole shoe ring I5, and the permanent magnet ring I9 is sleeved on the shaft 1;
the left pole shoe ring II4, the middle pole shoe ring II6 and the right pole shoe ring II8 are arranged on the inner wall of the shell 2, a permanent magnet ring II10 is arranged among the left pole shoe ring II4, the middle pole shoe ring II6 and the right pole shoe ring II8, and the right pole shoe ring II8 is arranged on the inner wall of the shell 2;
the radial heights of the left pole shoe ring I3 and the right pole shoe ring I7 are the same as the radial height of the permanent magnet ring I9, and the radial height of the middle pole shoe ring I5 is higher than the radial height of the permanent magnet ring I9; the radial height of the middle pole shoe ring II6 is higher than that of the permanent magnet ring II10, and the radial heights of the left pole shoe ring II4 and the right pole shoe ring II8 are higher than that of the middle pole shoe ring II 6;
the axial length of the left pole shoe ring II4 is greater than that of the left pole shoe ring I3 and less than the sum of the axial lengths of the left pole shoe ring I3 and the permanent magnet ring I9; the axial length of the right pole shoe ring II8 is larger than that of the right pole shoe ring I7 and smaller than the sum of the axial lengths of the right pole shoe ring I7 and the permanent magnet ring II10; the axial length of the middle pole shoe ring I5 is greater than that of the middle pole shoe ring II 6;
the part of the inner circular surface of the left pole shoe ring II4 corresponding to the outer circular surface of the left pole shoe ring I3 is provided with a pole tooth I11, the pole tooth I11 extends towards the outer circular surface of the left pole shoe ring I3 along the radial direction, a gap is reserved between the pole tooth I11 and the outer circular surface of the left pole shoe ring I3, and magnetic fluid is filled in the gap for sealing;
the part of the inner circular surface of the right pole shoe ring II8 corresponding to the outer circular surface of the right pole shoe ring I7 is provided with a pole tooth II12, the pole tooth II12 extends to the outer circular surface of the right pole shoe ring I7 along the radial direction, a gap is reserved between the pole tooth II and the outer circular surface of the right pole shoe ring I7, and magnetic fluid is filled in the gap for sealing;
the inner circular surface of the middle pole shoe ring II6 is provided with pole teeth III13, the pole teeth III13 extend along the radial direction to the outer circular surface of the middle pole shoe ring I5, a gap is reserved between the pole teeth III and the outer circular surface of the middle pole shoe ring I5, and magnetic fluid is filled in the gap for sealing.
The magnetic fluid sealing unit is provided with 1-5 groups, and the magnetic fluid sealing units are distributed along the axial direction of the shaft 1.
The number of the pole teeth I11 arranged on the inner circular surface of the left pole shoe ring II4 is 1-5; the number of the pole teeth II12 arranged on the inner circular surface of the right pole shoe ring II8 is 1-5.
The number of the pole teeth III13 arranged on the inner circular surface of the middle pole shoe ring II6 is 2-10.
The size of a gap between the pole tooth I11 and the outer circular surface of the left pole shoe ring I3 is 0.05-3 mm; the size of a gap between the pole tooth II12 and the outer circular surface of the right pole shoe ring I7 is 0.05-3 mm; the gap between the pole tooth III13 and the outer circular surface of the middle pole shoe ring I5 is 0.05-3 mm.
The permanent magnet ring I9 and the permanent magnet ring II10 are axial magnetizing permanent magnets.
The magnetic force lines between two adjacent permanent magnet rings I9 of the multi-magnetic source symmetrical magnetic fluid sealing device are opposite in direction; the magnetic force lines between two adjacent permanent magnet rings II10 are opposite in direction; in each magnetic fluid sealing unit, the magnetic force lines of the permanent magnet ring I5 and the permanent magnet ring II6 on the left side are opposite in direction, and the magnetic force lines of the permanent magnet ring I5 and the permanent magnet ring II6 on the right side are opposite in direction.
Grooves are formed in the outer circular surfaces of the left pole shoe ring II4 and the right pole shoe ring II8, and sealing rings 14 are arranged in the grooves.
The multi-magnetic source symmetrical magnetic fluid sealing device also comprises a left magnetism isolating ring 15, a left two magnetism isolating rings 16, a right one magnetism isolating ring 17 and a right two magnetism isolating rings 18; the left magnetism isolating ring 15 and the right magnetism isolating ring 17 are sleeved on the shaft 1, the left magnetism isolating ring 18 is positioned at the left side of the left pole shoe ring I3, and the right magnetism isolating ring 17 is positioned at the right side of the right pole shoe ring I7; the left magnetism isolating ring 16 and the right magnetism isolating ring 18 are arranged on the inner wall of the shell 2, the left magnetism isolating ring 16 is positioned on the left side of the left pole shoe ring II4, and the right magnetism isolating ring 18 is positioned on the right side of the right pole shoe ring II 8.
The multi-magnetic source symmetrical magnetic fluid sealing device also comprises a left bearing 19 and a right bearing 20; the left bearing 19 and the right bearing 20 are respectively sleeved on the shaft 1, and the left bearing 19 is arranged at the left side of the left first magnetism isolating ring 15 and the left second magnetism isolating ring 16 and is respectively contacted with the left first magnetism isolating ring 15 and the left second magnetism isolating ring 16; the right bearing 20 is arranged on the right side of the right first magnetism isolating ring 17 and the right second magnetism isolating ring 18 and is respectively contacted with the right first magnetism isolating ring 17 and the right second magnetism isolating ring 18.
Claims (8)
1. The utility model provides a many magnetic source symmetry formula magnetic fluid sealing device, includes shell (2), its characterized in that:
the magnetic fluid sealing unit comprises a left pole shoe ring I (3), a left pole shoe ring II (4), a middle pole shoe ring I (5), a middle pole shoe ring II (6), a right pole shoe ring I (7), a right pole shoe ring II (8), a permanent magnet ring I (9) and a permanent magnet ring II (10);
the left pole shoe ring I (3), the middle pole shoe ring I (5) and the right pole shoe ring I (7) are sleeved on the shaft (1) at intervals, a permanent magnet ring I (9) is arranged between the left pole shoe ring I (3) and the right pole shoe ring I (7) of the middle pole shoe ring I (5), and the permanent magnet ring I (9) is sleeved on the shaft (1);
the left pole shoe ring II (4), the middle pole shoe ring II (6) and the right pole shoe ring II (8) are arranged on the inner wall of the shell (2), a permanent magnet ring II (10) is arranged between the left pole shoe ring II (4), the middle pole shoe ring II (6) and the right pole shoe ring II (8), and the right pole shoe ring II (8) is arranged on the inner wall of the shell (2);
the radial height of the left pole shoe ring I (3) and the right pole shoe ring I (7) is the same as that of the permanent magnet ring I (9), and the radial height of the middle pole shoe ring I (5) is higher than that of the permanent magnet ring I (9); the radial height of the middle pole shoe ring II (6) is higher than that of the permanent magnet ring II (10), and the radial heights of the left pole shoe ring II (4) and the right pole shoe ring II (8) are higher than that of the middle pole shoe ring II (6);
the axial length of the left pole shoe ring II (4) is larger than that of the left pole shoe ring I (3) and smaller than the sum of the axial lengths of the left pole shoe ring I (3) and the permanent magnet ring I (9); the axial length of the right pole shoe ring II (8) is larger than that of the right pole shoe ring I (7) and smaller than the sum of the axial lengths of the right pole shoe ring I (7) and the permanent magnet ring II (10); the axial length of the middle pole shoe ring I (5) is larger than that of the middle pole shoe ring II (6);
the part of the inner circular surface of the left pole shoe ring II (4) corresponding to the outer circular surface of the left pole shoe ring I (3) is provided with pole teeth I (11), the pole teeth I (11) extend towards the outer circular surface of the left pole shoe ring I (3) along the radial direction, a gap is reserved between the pole teeth I (11) and the outer circular surface of the left pole shoe ring I (3), and magnetic fluid is filled in the gap for sealing;
the part of the inner circular surface of the right pole shoe ring II (8) corresponding to the outer circular surface of the right pole shoe ring I (7) is provided with a pole tooth II (12), the pole tooth II (12) extends to the outer circular surface of the right pole shoe ring I (7) along the radial direction, a gap is reserved between the pole tooth II and the outer circular surface of the right pole shoe ring I (7), and magnetic fluid is filled in the gap for sealing;
the inner circular surface of the middle pole shoe ring II (6) is provided with pole teeth III (13), the pole teeth III (13) extend along the radial direction to the outer circular surface of the middle pole shoe ring I (5), a gap is reserved between the pole teeth III and the outer circular surface of the middle pole shoe ring I (5), and magnetic fluid is filled in the gap for sealing;
the magnetic fluid sealing unit is provided with 1-5 groups and is arranged along the axial direction of the shaft (1);
the number of the pole teeth I (11) arranged on the inner circular surface of the left pole shoe ring II (4) is 1-5; the number of the pole teeth II (12) arranged on the inner circular surface of the right pole shoe ring II (8) is 1-5.
2. A multi-source symmetrical magnetic fluid seal as claimed in claim 1, wherein: the number of the pole teeth III (13) arranged on the inner circular surface of the middle pole shoe ring II (6) is 2-10.
3. A multi-source symmetrical magnetic fluid seal as claimed in claim 1, wherein: the size of a gap between the pole teeth I (11) and the outer circular surface of the left pole shoe ring I (3) is 0.05-3 mm; the size of a gap between the pole teeth II (12) and the outer circular surface of the right pole shoe ring I (7) is 0.05-3 mm; the size of the gap between the pole tooth III (13) and the outer circular surface of the middle pole shoe ring I (5) is 0.05-3 mm.
4. A multi-source symmetrical magnetic fluid seal as claimed in claim 1, wherein: the permanent magnet ring I (9) and the permanent magnet ring II (10) are axial magnetizing permanent magnets.
5. A multi-source symmetrical magnetic fluid seal apparatus according to claim 4, wherein: the magnetic force lines between two adjacent permanent magnet rings I (9) are opposite in direction; the magnetic force lines between two adjacent permanent magnet rings II (10) are opposite in direction; in each magnetic fluid sealing unit, the magnetic force lines of the permanent magnet ring I (9) on the left side and the permanent magnet ring II (10) on the right side are opposite in direction, and the magnetic force lines of the permanent magnet ring I (9) on the right side and the permanent magnet ring II (10) on the right side are opposite in direction.
6. A multi-source symmetrical magnetic fluid seal as claimed in claim 1, wherein: grooves are formed in the outer circular surfaces of the left pole shoe ring II (4) and the right pole shoe ring II (8), and sealing rings (14) are arranged in the grooves.
7. A multi-source symmetrical magnetic fluid seal as claimed in claim 1, wherein: the device also comprises a left magnetism isolating ring (15), a left two magnetism isolating rings (16), a right one magnetism isolating ring (17) and a right two magnetism isolating rings (18); the left magnetism isolating ring (15) and the right magnetism isolating ring (17) are sleeved on the shaft (1), the left magnetism isolating ring (15) is positioned on the left side of the left pole shoe ring I (3), and the right magnetism isolating ring (17) is positioned on the right side of the right pole shoe ring I (7); the left magnetic isolation ring (16) and the right magnetic isolation ring (18) are arranged on the inner wall of the shell (2), the left magnetic isolation ring (16) is positioned on the left side of the left pole shoe ring II (4), and the right magnetic isolation ring (18) is positioned on the right side of the right pole shoe ring II (8).
8. A multi-source symmetrical magnetic fluid seal as defined in claim 7 wherein: the device also comprises a left bearing (19) and a right bearing (20); the left bearing (19) and the right bearing (20) are respectively sleeved on the shaft (1), and the left bearing (19) is arranged on the left side of the left magnetic isolation ring (15) and the left magnetic isolation ring (16) and is respectively contacted with the left magnetic isolation ring (15) and the left magnetic isolation ring (16); the right bearing (20) is arranged on the right side of the right first magnetism isolating ring (17) and the right second magnetism isolating ring (18) and is respectively contacted with the right first magnetism isolating ring (17) and the right second magnetism isolating ring (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017111.8A CN108799506B (en) | 2018-09-03 | 2018-09-03 | Multi-magnetic source symmetrical magnetic fluid sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017111.8A CN108799506B (en) | 2018-09-03 | 2018-09-03 | Multi-magnetic source symmetrical magnetic fluid sealing device |
Publications (2)
| Publication Number | Publication Date |
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| CN108799506A CN108799506A (en) | 2018-11-13 |
| CN108799506B true CN108799506B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811017111.8A Active CN108799506B (en) | 2018-09-03 | 2018-09-03 | Multi-magnetic source symmetrical magnetic fluid sealing device |
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| US4444398A (en) * | 1983-02-22 | 1984-04-24 | Ferrofluidics Corporation | Self-activating ferrofluid seal apparatus and method |
| JPH0612875U (en) * | 1992-07-21 | 1994-02-18 | 日本精工株式会社 | Multi-stage magnetic fluid sealing device for vacuum |
| JPH07174240A (en) * | 1993-12-17 | 1995-07-11 | Rigaku Corp | Straight advancing type magnetic fluid shaft sealing device |
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| CN103115152A (en) * | 2013-01-30 | 2013-05-22 | 北京交通大学 | Magnetic fluid and maze alternated type combined sealing |
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| CN105570466A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical ladder type magnetic fluid sealing device |
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2018
- 2018-09-03 CN CN201811017111.8A patent/CN108799506B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4444398A (en) * | 1983-02-22 | 1984-04-24 | Ferrofluidics Corporation | Self-activating ferrofluid seal apparatus and method |
| JPH0612875U (en) * | 1992-07-21 | 1994-02-18 | 日本精工株式会社 | Multi-stage magnetic fluid sealing device for vacuum |
| JPH07174240A (en) * | 1993-12-17 | 1995-07-11 | Rigaku Corp | Straight advancing type magnetic fluid shaft sealing device |
| CN1544834A (en) * | 2003-11-18 | 2004-11-10 | 北京交通大学 | Low-temperature large diameter magnetic liquid sealing arrangement |
| CN101737497A (en) * | 2010-02-11 | 2010-06-16 | 北京交通大学 | Magnetic liquid and triclinic mouth packing ring combined reciprocating shaft sealing device |
| CN103115152A (en) * | 2013-01-30 | 2013-05-22 | 北京交通大学 | Magnetic fluid and maze alternated type combined sealing |
| CN203670800U (en) * | 2014-01-17 | 2014-06-25 | 北京交通大学 | Magnetic liquid sealing device for sealing liquid |
| CN105570466A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical ladder type magnetic fluid sealing device |
Non-Patent Citations (1)
| Title |
|---|
| 一种高性能铁磁流体密封系统的实验研究;池长青,王之珊,赵丕智,潘华;北京航空航天大学学报(04);第131-135页 * |
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| CN108799506A (en) | 2018-11-13 |
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