CN109357018B - Magnetic source embedded type series-parallel connection type stepped shaft magnetic fluid sealing device - Google Patents
Magnetic source embedded type series-parallel connection type stepped shaft magnetic fluid sealing device Download PDFInfo
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- CN109357018B CN109357018B CN201811070179.2A CN201811070179A CN109357018B CN 109357018 B CN109357018 B CN 109357018B CN 201811070179 A CN201811070179 A CN 201811070179A CN 109357018 B CN109357018 B CN 109357018B
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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 magnetic source embedded type series-parallel connection stepped shaft magnetic fluid sealing device, wherein the diameter of a corresponding stepped shaft is the largest of the diameter of an intermediate shaft, the diameter of a secondary shaft on the left side of the intermediate shaft is gradually reduced from right to left, and the diameter of a secondary shaft on the right side of the intermediate shaft is gradually reduced from left to right; comprises a shell, a left pole shoe ring, a right pole shoe ring, a permanent magnet ring I, a permanent magnet ring II, a permanent magnet ring III and a permanent magnet ring IV. The invention can solve the problem of lower pressure resistance of the existing sealing device, has simple assembly and easy processing, and ensures that the sealing technology is successfully applied 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 magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device.
Background
The magnetic fluid is popularized and developed in the world since the advent, and has zero-leakage sealing capability, because the moving part and the static part have no solid friction and only viscous friction, and the loss is small compared with a contact sealing type, the magnetic fluid is particularly suitable for the conditions of low friction resistance and high rotating speed, and in addition, the magnetic fluid has a simple technical structure, is convenient to operate and maintain, and has good chemical and physical properties, so that the magnetic fluid is widely applied. However, under the condition that a large sealing clearance is required, such as a high-speed shaft, the sealing performance of the magnetic fluid is poor, so that the research on improving the pressure resistance of the magnetic fluid under the condition of the large clearance has important significance.
Therefore, by improving a magnetic fluid sealing structure as a method for improving the pressure resistance of the magnetic fluid seal under a large gap, such as the sealing device described in the reference (patent publication No. CN 207569208U), although the sealing device described in the above document is greatly improved in the sealing performance with respect to the ordinary magnetic fluid, there is still room for further improvement in the sealing performance of the existing sealing structure.
Disclosure of Invention
The invention aims to provide a magnetic source embedded type series-parallel magnetic fluid sealing device, so that the problem of low pressure resistance of the existing sealing device is solved, and meanwhile, the sealing device is simple to assemble and easy to process, so that 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 magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device is characterized in that the diameter of the corresponding stepped shaft is the largest of the diameters of the intermediate shafts, the diameters of the secondary shafts on the left side of the intermediate shafts are sequentially decreased from right to left, and the diameters of the secondary shafts on the right side of the intermediate shafts are sequentially decreased from left to right;
comprises a shell, a left pole shoe ring, a right pole shoe ring, a permanent magnet ring I, a permanent magnet ring II, a permanent magnet ring III and a permanent magnet ring IV;
the left pole shoe ring, the right pole shoe ring and the permanent magnet ring II are arranged on the inner wall of the shell; the permanent magnet ring II 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 outer circular surface of the permanent magnet ring I is opposite to the inner circular surface of the permanent magnet ring II, and a gap is reserved between the outer circular surface of the permanent magnet ring I and the inner circular surface of the permanent magnet ring II;
a tangent plane I is arranged on the right end surface of the left pole shoe ring close to the inner edge, a tangent plane II is arranged on the left end surface of the intermediate shaft of the stepped shaft close to the outer edge, the tangent plane I and the tangent plane II correspond to each other, a gap is reserved between the tangent plane I and the tangent plane II, and the gap is filled with magnetic fluid for sealing;
a tangent plane III is arranged on the left end surface of the right pole shoe ring close to the inner edge, a tangent plane IV is arranged on the right end surface of the intermediate shaft of the stepped shaft close to the outer edge, the tangent plane III and the tangent plane IV correspond to each other, a gap is reserved between the tangent plane III and the tangent plane IV, and the gap is filled with magnetic fluid for sealing;
the inner circular surface of the left pole shoe ring corresponds to the outer circular surface of the secondary shaft on the left side of the intermediate shaft; more than one groove II is formed in the secondary shaft on the left side of the intermediate shaft at intervals, the permanent magnet ring III is embedded in the groove II in a split mode, and the outer circular surface of the permanent magnet ring III is flush with the outer circular surface of the secondary shaft; more than one pole tooth I is arranged on the inner circular surface of the left pole shoe ring at intervals, the pole teeth I correspond to the outer circular surface of the permanent magnet ring III one by one, the pole teeth I extend to the outer circular surface of the permanent magnet ring III along the radial direction, a gap is reserved between the pole teeth I and the outer circular surface of the permanent magnet ring III, and the gap is filled with magnetic fluid for sealing;
the inner circular surface of the right pole shoe ring corresponds to the outer circular surface of the secondary shaft on the right side of the intermediate shaft; more than one groove III is formed in the secondary shaft on the right side of the intermediate shaft at intervals, the permanent magnet ring IV is embedded in the groove III in a split mode, and the outer circular surface of the permanent magnet ring IV is flush with the outer circular surface of the secondary shaft; more than one group of pole teeth II are arranged on the inner circular surface of the right pole shoe ring at intervals, the pole teeth II correspond to the outer circular surface of the permanent magnet ring IV one by one, the pole teeth II extend to the outer circular surface of the permanent magnet ring IV along the radial direction, a gap is reserved between the pole teeth II and the outer circular surface of the permanent magnet ring IV, and the gap is filled with magnetic fluid for sealing.
The secondary shaft on the left side of the intermediate shaft on the stepped shaft is provided with 1-3 stages, and 1-3 left pole shoe rings are correspondingly arranged; the secondary shaft on the right side of the intermediate shaft on the stepped shaft is provided with 1-3 stages, and 1-3 right pole shoe rings are correspondingly arranged.
The number of the grooves II arranged on the outer circular surface on the left side of the intermediate shaft on the stepped shaft is 1-6, and the pole teeth I and the permanent magnet rings III are arranged corresponding to the grooves II; the number of the grooves III formed in the outer circular surface on the right side of the intermediate shaft on the stepped shaft is 1-6, and the pole teeth II and the permanent magnet rings IV are arranged corresponding to the grooves III.
The size of a gap between the section I and the section II is 0.05-3 mm; the size of the gap between the section III and the section IV is 0.05-3 mm.
The size of a gap between the pole tooth I and the outer circular surface of the permanent magnet ring III is 0.05-3 mm; the size of a gap between the pole teeth II and the outer circular surface of the permanent magnet ring IV is 0.05-3 mm.
The permanent magnet ring I and the permanent magnet ring II are axial magnetizing permanent magnets, and the directions of magnetic lines of force of the permanent magnet ring I and the permanent magnet ring II are opposite.
The permanent magnet ring III and the permanent magnet ring IV are radial magnetizing permanent magnets, and the directions of magnetic lines of force of the permanent magnet ring III and the permanent magnet ring IV are opposite.
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 magnetic source embedded type series-parallel connection type stepped shaft 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 magnetic source embedded type series-parallel connection type stepped shaft 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 stepped 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 invention aims to solve the technical defects in the prior art and provides a magnetic source embedded type series-parallel magnetic fluid sealing device which can solve the problem of insufficient pressure resistance of the sealing device under the condition of large gap. The groove is formed in the stepped shaft, so that the permanent magnets which are magnetized in the radial direction and the axial direction are embedded into the groove, the using space is reduced, and the magnetic flux in a magnetic circuit is increased.
The permanent magnet ring I, the permanent magnet ring II, the permanent magnet ring III and the permanent magnet ring IV form a complete magnetic loop together, so that the magnetic fluid can exist more stably in the corresponding gap.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic source embedded hybrid stepped shaft magnetic fluid sealing device according to an embodiment of the present invention;
the serial number designations and corresponding designations in the drawings are as follows:
1-stepped shaft, 2-shell, 3-left pole shoe ring, 4-right pole shoe ring, 5-permanent magnet ring I, 6-permanent magnet ring II, 7-permanent magnet ring III, 8-permanent magnet ring IV, 9-section I, 10-section II, 11-section III, 12-section IV, 13-pole tooth I, 14-pole tooth II, 15-sealing ring, 16-left magnetic isolation ring, 17-right magnetic isolation ring, 18-left bearing and 19-right bearing.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, in the magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device, the diameter of a corresponding stepped shaft 1 is the largest of the diameters of the intermediate shafts, the diameters of the secondary shafts on the left side of the intermediate shafts are sequentially decreased from right to left, and the diameters of the secondary shafts on the right side of the intermediate shafts are sequentially decreased from left to right;
comprises a shell 2, a left pole shoe ring 3, a right pole shoe ring 4, a permanent magnet ring I5, a permanent magnet ring II6, a permanent magnet ring III7 and a permanent magnet ring IV 8;
the left pole shoe ring 3, the right pole shoe ring 4 and the permanent magnet ring II6 are arranged on the inner wall of the shell 2; the permanent magnet ring II6 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 outer circular surface of the stepped shaft 1 is provided with a groove I, the permanent magnet ring I5 is embedded in the groove I in a split manner, the outer circular surface of the permanent magnet ring I5 is flush with the outer circular surface of the stepped shaft 1, the outer circular surface of the permanent magnet ring I5 is opposite to the inner circular surface of the permanent magnet ring II6, and gaps are reserved between the outer circular surface of the permanent magnet ring I3526 and the inner circular surface of the permanent magnet ring II 6;
a tangent plane I9 is arranged on the right end surface of the left pole shoe ring 3 close to the inner edge, a tangent plane II10 is arranged on the left end surface of the intermediate shaft of the stepped shaft 1 close to the outer edge, the tangent plane I9 and the tangent plane II10 correspond to each other, a gap is reserved between the tangent plane I10 and the tangent plane II10, and magnetic fluid is filled in the gap for sealing;
a tangent plane III11 is arranged on the left end surface of the right pole shoe ring 4 close to the inner edge, a tangent plane IV 12 is arranged on the right end surface of the intermediate shaft of the stepped shaft 1 close to the outer edge, the tangent plane III11 and the tangent plane IV 12 correspond to each other, a gap is reserved between the tangent plane III11 and the tangent plane IV 12, and the gap is filled with magnetic fluid for sealing;
the inner circular surface of the left pole shoe ring 3 corresponds to the outer circular surface of the secondary shaft on the left side of the intermediate shaft; more than one groove II is formed in the secondary shaft on the left side of the intermediate shaft at intervals, the permanent magnet ring III7 is embedded in the groove II in a split mode, and the outer circular surface of the permanent magnet ring III7 is flush with the outer circular surface of the secondary shaft; more than one pole tooth I13 is arranged on the inner circular surface of the left pole shoe ring 3 at intervals, the pole teeth I13 correspond to the outer circular surface of the permanent magnet ring III7 one by one, the pole teeth I13 extend to the outer circular surface of the permanent magnet ring III7 along the radial direction, a gap is reserved between the pole teeth and the outer circular surface of the permanent magnet ring III7, and the gap is filled with magnetic fluid for sealing;
the inner circular surface of the right pole shoe ring 4 corresponds to the outer circular surface of the secondary shaft on the right side of the intermediate shaft; more than one groove III is formed in the secondary shaft on the right side of the intermediate shaft at intervals, the permanent magnet ring IV 8 is embedded in the groove III in a split mode, and the outer circular surface of the permanent magnet ring IV 8 is flush with the outer circular surface of the secondary shaft; more than one group of pole teeth II14 are arranged on the inner circular surface of the right pole shoe ring 4 at intervals, the pole teeth II14 correspond to the outer circular surface of the permanent magnet ring IV 8 one by one, the pole teeth II14 extend to the outer circular surface of the permanent magnet ring IV 8 along the radial direction, a gap is reserved between the pole teeth and the outer circular surface of the permanent magnet ring IV 8, and the gap is filled with magnetic fluid for sealing.
The secondary shaft on the left side of the middle shaft on the stepped shaft 1 is provided with 1-3 stages, and 1-3 left pole shoe rings 3 are correspondingly arranged; the secondary shaft on the right side of the middle shaft on the stepped shaft 1 is provided with 1-3 stages, and 1-3 right pole shoe rings 4 are correspondingly arranged.
The number of the grooves II arranged on the outer circular surface of the left side of the middle shaft on the stepped shaft 1 is 1-6, and the pole teeth I13 and the permanent magnet rings III7 are arranged corresponding to the grooves II; the number of the grooves III formed in the outer circular surface on the right side of the middle shaft on the stepped shaft 1 is 1-6, and the pole teeth II14 and the permanent magnet rings IV 8 are arranged corresponding to the grooves III.
The size of a gap between the section I9 and the section II10 is 0.05-3 mm; the size of the gap between the tangent plane III11 and the tangent plane IV 12 is 0.05-3 mm.
The size of a gap between the pole tooth I13 and the outer circular surface of the permanent magnet ring III7 is 0.05-3 mm; the size of a gap between the pole teeth II14 and the outer circular surface of the permanent magnet ring IV 8 is 0.05-3 mm.
The permanent magnet ring I5 and the permanent magnet ring II6 are axial magnetizing permanent magnets, and the directions of magnetic lines of the permanent magnet ring I5 and the permanent magnet ring II6 are opposite.
The permanent magnet ring III7 and the permanent magnet ring IV 8 are radial magnetizing permanent magnets, and the directions of magnetic lines of force of the permanent magnet ring III7 and the permanent magnet ring IV 8 are opposite.
Grooves are formed in the outer circular surfaces of the left pole shoe ring 3 and the right pole shoe ring 4, and sealing rings 15 are arranged in the grooves.
The magnetic source embedded type series-parallel connection type stepped shaft magnetic fluid sealing device also comprises a left magnetism isolating ring 16 and a right magnetism isolating ring 17; the left magnetism isolating ring 16 and the right magnetism isolating ring 17 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 3, and the right magnetism isolating ring 17 is positioned on the right side of the right pole shoe ring 5.
The magnetic source embedded type series-parallel connection type stepped shaft magnetic fluid sealing device further comprises a left bearing 18 and a right bearing 19, wherein the left bearing 18 and the right bearing 19 are respectively sleeved on the stepped shaft 1, and the left bearing 18 is arranged on the left side of the left magnetism isolating ring 16 and is in contact with the left magnetism isolating ring 16; the right bearing 19 is arranged on the right side of the right magnetism isolating ring 17 and is in contact with the right magnetism isolating ring 17.
Claims (8)
1. A magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device is characterized in that a corresponding stepped shaft (1) is the largest in diameter of an intermediate shaft, the diameter of a secondary shaft on the left side of the intermediate shaft is gradually reduced from right to left, and the diameter of the secondary shaft on the right side of the intermediate shaft is gradually reduced from left to right; the method is characterized in that:
comprises a shell (2), a left pole shoe ring (3), a right pole shoe ring (4), a permanent magnet ring I (5), a permanent magnet ring II (6), a permanent magnet ring III (7) and a permanent magnet ring IV (8);
the left pole shoe ring (3), the right pole shoe ring (4) and the permanent magnet ring II (6) are arranged on the inner wall of the shell (2); the permanent magnet ring II (6) 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 outer circular surface of the stepped shaft (1) is provided with a groove I, the permanent magnet rings I (5) are embedded in the groove I in a split manner, the outer circular surface of the permanent magnet rings I (5) is flush with the outer circular surface of the stepped shaft (1), the outer circular surface of the permanent magnet rings I (5) is opposite to the inner circular surface of the permanent magnet rings II (6), and gaps are reserved between the outer circular surface of the permanent magnet rings I (5) and the inner circular surface of the permanent magnet rings II (6);
a tangent plane I (9) is arranged on the right end surface of the left pole shoe ring (3) close to the inner edge, a tangent plane II (10) is arranged on the left end surface of the intermediate shaft of the stepped shaft (1) close to the outer edge, the tangent plane I (9) and the tangent plane II (10) correspond to each other, a gap is reserved between the tangent plane I (9) and the tangent plane II (10), and the gap is filled with magnetic fluid for sealing;
a tangent plane III (11) is arranged on the left end face of the right pole shoe ring (4) close to the inner edge, a tangent plane IV (12) is arranged on the right end face of the intermediate shaft of the stepped shaft (1) close to the outer edge, the tangent plane III (11) and the tangent plane IV (12) correspond to each other, a gap is reserved between the tangent plane III (11) and the tangent plane IV (12), and the gap is filled with magnetic fluid for sealing;
the inner circular surface of the left pole shoe ring (3) corresponds to the outer circular surface of the secondary shaft on the left side of the intermediate shaft; more than one groove II is formed in the secondary shaft on the left side of the intermediate shaft at intervals, the permanent magnet rings III (7) are embedded in the grooves II in a split mode, and the outer circular surface of each permanent magnet ring III (7) is flush with the outer circular surface of the secondary shaft; more than one pole tooth I (13) is arranged on the inner circular surface of the left pole shoe ring (3) at intervals, the pole teeth I (13) correspond to the outer circular surface of the permanent magnet ring III (7) one by one, the pole teeth I (13) extend to the outer circular surface of the permanent magnet ring III (7) along the radial direction, a gap is reserved between the pole teeth I (13) and the outer circular surface of the permanent magnet ring III (7), and the gap is filled with magnetic fluid for sealing;
the inner circular surface of the right pole shoe ring (4) corresponds to the outer circular surface of the secondary shaft on the right side of the intermediate shaft; more than one groove III is formed in the secondary shaft on the right side of the intermediate shaft at intervals, the permanent magnet rings IV (8) are embedded in the grooves III in a split mode, and the outer circular surface of each permanent magnet ring IV (8) is flush with the outer circular surface of the secondary shaft; more than one pole tooth II (14) is arranged on the inner circular surface of the right pole shoe ring (4) at intervals, the pole teeth II (14) correspond to the outer circular surface of the permanent magnet ring IV (8) one by one, the pole teeth II (14) extend to the outer circular surface of the permanent magnet ring IV (8) along the radial direction, a gap is reserved between the pole teeth II and the outer circular surface of the permanent magnet ring IV (8), and the gap is filled with magnetic fluid for sealing;
the permanent magnet ring I (5) and the permanent magnet ring II (6) are axial magnetizing permanent magnets, and the directions of magnetic lines of force of the permanent magnet ring I (5) and the permanent magnet ring II (6) are opposite;
the permanent magnet ring III (7) and the permanent magnet ring IV (8) are radial magnetizing permanent magnets, and the directions of magnetic lines of force of the permanent magnet ring III (7) and the permanent magnet ring IV (8) are opposite.
2. The magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device according to claim 1, characterized in that: the secondary shaft on the left side of the middle shaft on the stepped shaft (1) is provided with 1-3 stages, and 1-3 left pole shoe rings (3) are correspondingly arranged; the secondary shaft on the right side of the middle shaft on the stepped shaft (1) is provided with 1-3 stages, and 1-3 right pole shoe rings (4) are correspondingly arranged.
3. The magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device according to claim 1, characterized in that:
the number of the grooves II formed in the outer circular surface of the left side of the middle shaft on the stepped shaft (1) is 1-6, and the pole teeth I (13) and the permanent magnet rings III (7) are arranged corresponding to the grooves II; the number of the grooves III formed in the outer circular surface on the right side of the middle shaft on the stepped shaft (1) is 1-6, and the pole teeth II (14) and the permanent magnet rings IV (8) are arranged corresponding to the grooves III.
4. The magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device according to claim 1, characterized in that: the size of a gap between the section I (9) and the section II (10) is 0.05-3 mm; the size of the gap between the tangent plane III (11) and the tangent plane IV (12) is 0.05-3 mm.
5. The magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device according to claim 1, characterized in that: the size of a gap between the pole tooth I (13) and the outer circular surface of the permanent magnet ring III (7) is 0.05-3 mm; the size of a gap between the pole teeth II (14) and the outer circular surface of the permanent magnet ring IV (8) is 0.05-3 mm.
6. The magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device according to claim 1, characterized in that: 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 (15) are arranged in the grooves.
7. The magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device according to claim 1, characterized in that: the magnetic field isolation device also comprises a left magnetism isolation ring (16) and a right magnetism isolation ring (17); the left magnetism isolating ring (16) and the right magnetism isolating ring (17) are arranged on the inner wall of the shell (2), the left magnetism isolating ring (16) is located on the left side of the left pole shoe ring (3), and the right magnetism isolating ring (17) is located on the right side of the right pole shoe ring (4).
8. The magnetic source embedded type series-parallel stepped shaft magnetic fluid sealing device according to claim 1, characterized in that: the magnetic bearing is characterized by further comprising a left bearing (18) and a right bearing (19), wherein the left bearing (18) and the right bearing (19) are respectively sleeved on the stepped shaft (1), and the left bearing (18) is arranged on the left side of the left magnetism isolating ring (16) and is in contact with the left magnetism isolating ring (16); the right bearing (19) is arranged on the right side of the right magnetism isolating ring (17) and is in contact with the right magnetism isolating ring (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811070179.2A CN109357018B (en) | 2018-09-13 | 2018-09-13 | Magnetic source embedded type series-parallel connection type stepped shaft magnetic fluid sealing device |
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| CN201811070179.2A CN109357018B (en) | 2018-09-13 | 2018-09-13 | Magnetic source embedded type series-parallel connection type stepped shaft magnetic fluid sealing device |
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| CN109357018A CN109357018A (en) | 2019-02-19 |
| CN109357018B true CN109357018B (en) | 2021-03-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112728108B (en) * | 2021-01-12 | 2022-02-01 | 清华大学 | Magnetic field adjustable magnetic liquid sealing device |
| CN112728109B (en) * | 2021-01-13 | 2022-05-31 | 清华大学 | Magnetic liquid sealing device with embedded permanent magnet |
| CN114215854A (en) * | 2021-12-20 | 2022-03-22 | 北京交通大学 | Multi-magnetic-source magnetic fluid sealing device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1048214A1 (en) * | 1982-04-21 | 1983-10-15 | Предприятие П/Я Г-4213 | Magnetic liquid-packed seal |
| CN2651527Y (en) * | 2003-11-24 | 2004-10-27 | 北京交通大学 | Magnetic liquid sealer with guiding structure |
| CN100360839C (en) * | 2006-08-01 | 2008-01-09 | 中国兵器工业第五二研究所 | Magnetic liquid sealing device |
| CN105570465B (en) * | 2016-03-02 | 2018-11-27 | 广西科技大学 | A kind of labyrinth type magnetic fluid seal device |
| CN105822768B (en) * | 2016-05-25 | 2017-12-05 | 广西科技大学 | A kind of tandem type end-surface type magnetic fluid seal device |
| CN108087561B (en) * | 2017-12-13 | 2020-05-05 | 广西科技大学 | Mixed type magnetic source magnetic fluid sealing device |
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