CN108843792B - Symmetrical step-type magnetic fluid sealing device - Google Patents
Symmetrical step-type magnetic fluid sealing device Download PDFInfo
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- CN108843792B CN108843792B CN201811017129.8A CN201811017129A CN108843792B CN 108843792 B CN108843792 B CN 108843792B CN 201811017129 A CN201811017129 A CN 201811017129A CN 108843792 B CN108843792 B CN 108843792B
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- ring
- permanent magnet
- stepped
- pole shoe
- gap
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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
Abstract
the invention relates to a symmetrical step-type magnetic fluid sealing device which comprises a shell, a left pole shoe ring, a right pole shoe ring, a middle pole shoe ring, an outer pole shoe ring, a permanent magnet ring I, a permanent magnet ring II, a permanent magnet ring III and a permanent magnet ring IV, wherein the middle pole shoe ring comprises an inner sleeve and an outer sleeve, and the inner sleeve and the outer sleeve are both of a step sleeve structure; the left pole shoe is annularly arranged on the inner wall of the shell; the right pole shoe is annularly arranged on the inner wall of the shell; a step ring surface and an outer circular surface on the right end surface of the left pole shoe ring are respectively provided with a ring groove I and a ring groove II; a permanent magnet ring I is arranged in the ring groove I, and a permanent magnet ring II is arranged in the ring groove II; a step ring surface and an outer circular surface on the left end surface of the right pole shoe ring are respectively provided with a ring groove III and a ring groove IV; a permanent magnet ring III is arranged in the ring groove III; and a permanent magnet ring IV is arranged in the annular groove IV. The invention can solve the problem that the pressure resistance of the sealing device is influenced by a larger centrifugal force.
Description
Technical Field
The invention belongs to the field of mechanical engineering sealing, and particularly relates to a symmetrical step type magnetic fluid sealing device.
Background
In the application of the magnetic liquid seal, the magnetic fluid is influenced by a larger centrifugal force under the condition that the shaft rotates at a high speed, so that part of the magnetic fluid is lost, and the pressure resistance of the magnetic liquid seal is reduced. Therefore, reducing the influence of centrifugal force on the pressure resistance of the magnetic liquid seal is one of the hot problems of the current research.
One of the methods of reducing the influence of centrifugal force on the pressure resistance of the magnetic liquid seal is by improving a magnetic fluid seal structure such as a seal device described in reference 1 (patent publication No. CN 103115152 a). Although the sealing device described in the above document has greatly improved sealing performance compared with the common magnetic fluid, the sealing device does not consider the influence of centrifugal force on the pressure resistance of the magnetic fluid seal.
Disclosure of Invention
The invention aims to provide a symmetrical step type magnetic fluid sealing device, so that the problem that the pressure resistance of the sealing device is influenced by a larger centrifugal force of the conventional sealing device is solved, and the sealing technology is successfully applied to occasions with large axial diameter and high-speed rotation.
The technical scheme of the invention is as follows:
the symmetrical step-type magnetic fluid sealing device comprises a shell, a left pole shoe ring, a right pole shoe ring, a middle pole shoe ring, an outer 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 middle pole shoe ring is sleeved on the shaft, the outer pole shoe ring is arranged on the inner wall of the shell, the middle pole shoe ring and the outer pole shoe ring correspond to each other, and a gap is reserved between the middle pole shoe ring and the outer pole shoe ring;
The middle pole shoe ring comprises an inner sleeve and an outer sleeve, and the inner sleeve and the outer sleeve are both in a stepped sleeve structure; the left end surface of the inner sleeve is a stepped ring surface, the axial length of each stepped ring surface is continuously reduced along the direction from left to right, the right end surface of the inner sleeve is a stepped ring surface, and the axial length of each stepped ring surface is continuously reduced along the direction from right to left; the left end face of the outer sleeve is a stepped ring face, the axial length of each stepped ring face is continuously reduced along the direction from left to right, the right end face of the outer sleeve is a stepped ring face, and the axial length of each stepped ring face is continuously reduced along the direction from right to left; the stepped ring surfaces of the inner sleeve and the outer sleeve are symmetrical, and the tops of the inner sleeve and the outer sleeve are connected with each other;
the left pole shoe is arranged on the inner wall of the shell in a surrounding manner, and a gap is reserved between the outer circular surface of the left pole shoe and the shaft; the right end surface of the left pole shoe ring is of a stepped ring surface structure, each stepped ring surface is arranged corresponding to each stepped ring surface of the left end surface of the inner sleeve and the outer sleeve respectively, and a gap is reserved between each stepped ring surface and the outer circular surface of the right end surface of the left pole shoe ring and the stepped ring surface and the inner circular surface of the left end surface of the inner sleeve or the outer sleeve respectively;
The right pole shoe ring is arranged on the inner wall of the shell, a gap is reserved between the outer circular surface of the right pole shoe ring and the shaft, the left end surface of the right pole shoe ring is of a stepped ring surface structure, each stepped ring surface is arranged corresponding to each stepped ring surface of the right end surface of the inner sleeve and the outer sleeve respectively, and a gap is reserved between each stepped ring surface and the outer circular surface of the left end surface of the right pole shoe ring and the stepped ring surface and the inner circular surface of the right end surface of the inner sleeve or the outer sleeve respectively;
A step ring surface and an outer circular surface on the right end surface of the left pole shoe ring are respectively provided with a ring groove I and a ring groove II; the permanent magnet ring I is arranged in the annular groove I, extends to the stepped ring surface on the left end surface of the inner sleeve or the outer sleeve along the axial direction, and a gap is reserved between the permanent magnet ring I and the stepped ring surface and is filled with magnetic fluid for sealing; the ring groove II is internally provided with a permanent magnet ring II, the permanent magnet ring II extends to the inner circular surface on the left end surface of the inner sleeve or the outer sleeve along the radial direction, a gap is reserved between the permanent magnet ring II and the inner circular surface, and the gap is filled with magnetic fluid for sealing;
a step ring surface and an outer circular surface on the left end surface of the right pole shoe ring are respectively provided with a ring groove III and a ring groove IV; the ring groove III is internally provided with a permanent magnet ring III, the permanent magnet ring III axially extends towards the stepped ring surface on the right end surface of the inner sleeve or the outer sleeve, a gap is reserved between the permanent magnet ring III and the stepped ring surface, and the gap is filled with magnetic fluid for sealing; and a permanent magnet ring IV is arranged in the annular groove IV, the permanent magnet ring IV extends to the inner circular surface on the right end surface of the inner sleeve or the outer sleeve along the radial direction, a gap is reserved between the permanent magnet ring IV and the inner circular surface, and the gap is filled with magnetic fluid for sealing.
The left end face and the right end face of the inner sleeve and the outer sleeve are symmetrical to each other.
2-5 permanent magnet rings I7 and II are respectively arranged; the permanent magnet ring I and the permanent magnet ring II are both composed of a plurality of split permanent magnets.
The number of the permanent magnet rings III and the number of the permanent magnet rings IV are respectively 2-5, and the permanent magnet rings III and the permanent magnet rings IV are both composed of a plurality of split permanent magnets.
The gap between the permanent magnet ring I and the stepped ring surface on the left end surface of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm;
the size of a gap between the permanent magnet ring II and the inner circular surface on the left end face of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm;
the gap between the permanent magnet ring III and the stepped ring surface on the right end surface of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm;
the size of a gap between the permanent magnet ring IV and the inner circular surface on the right end surface of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm.
The permanent magnet rings I and the permanent magnet rings III are axial magnetizing permanent magnets, the directions of magnetic lines of force of the adjacent permanent magnet rings I are opposite, and the directions of magnetic lines of force of the adjacent permanent magnet rings III are opposite.
the permanent magnet rings II and the permanent magnet rings IV are radial magnetizing permanent magnets, the directions of the magnetic lines of force of the permanent magnet rings II are the same, and the directions of the magnetic lines of force of the permanent magnet rings IV are the same.
the outer circular surfaces of the left pole shoe ring and the right pole shoe ring are respectively provided with a groove, and a sealing ring is arranged in each groove.
The symmetrical step-type magnetic fluid sealing device further comprises two magnetism isolating rings, wherein the magnetism isolating rings are arranged on the inner wall of the shell and are respectively positioned on the left side of the left pole shoe ring and the right side of the right pole shoe ring.
The symmetrical step-type magnetic fluid sealing device also 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 on the left side of the magnetism isolating ring at the left end; the right bearing is arranged on the right side of the magnetism isolating ring at the right end.
the invention designs split symmetrical stepped pole shoes, the left and right pole shoes are also stepped, permanent magnet rings I, II, III and IV are respectively arranged on the left and right pole shoes in the axial and radial directions, and magnetic fluid is injected into gaps between the left and right pole shoes and the symmetrical stepped pole shoes, thereby realizing the symmetrical stepped magnetic fluid sealing device.
the directions of magnetic lines of force of adjacent permanent magnet rings I are opposite, and the directions of magnetic lines of force of adjacent permanent magnet rings III are opposite; the directions of the magnetic lines of force of the permanent magnet rings II are the same, and the directions of the magnetic lines of force of the permanent magnet rings IV are the same; the formation of the magnetic circuit is ensured, so that the magnetic fluid can exist more stably in the corresponding gap.
The invention can overcome the problem that the sealing performance of the existing sealing device is reduced under the condition of larger centrifugal force, and the split permanent magnet combination is adopted to install the symmetrical step-type pole shoe structure design, thereby further reducing the influence of the centrifugal force on the pressure resistance of the sealing device, improving the pressure resistance and the sealing reliability of the magnetic fluid seal under the condition of large axial diameter and expanding the safe working range.
Drawings
FIG. 1 is a schematic structural diagram of a symmetric stepped 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-shaft, 2-shell, 3-left pole shoe ring, 4-right pole shoe ring, 5-middle pole shoe ring, 6-outer pole shoe ring, 7-permanent magnet ring I, 8-permanent magnet ring II, 9-permanent magnet ring III, 10-permanent magnet ring IV, 11-sealing ring, 12-magnetism isolating ring, 13-left bearing and 14-right bearing.
51-inner sleeve, 52-outer sleeve.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the symmetric stepped magnetic fluid sealing device includes a housing 2, a left pole shoe ring 3, a right pole shoe ring 4, a middle pole shoe ring 5, an outer pole shoe ring 6, a permanent magnet ring I7, a permanent magnet ring II8, a permanent magnet ring III9, and a permanent magnet ring iv 10, and is characterized in that:
The middle pole shoe ring 5 is sleeved on the shaft 1, the outer pole shoe ring 4 is arranged on the inner wall of the shell 2, the middle pole shoe ring 5 corresponds to the outer pole shoe ring 6, and a gap is reserved between the middle pole shoe ring 5 and the outer pole shoe ring 6;
the middle pole shoe ring 5 comprises an inner sleeve 51 and an outer sleeve 52, and the inner sleeve 51 and the outer sleeve 52 are both of a stepped sleeve structure; the left end surface of the inner sleeve 51 is a stepped ring surface, the axial length of each stepped ring surface is continuously reduced along the direction from left to right, the right end surface of the inner sleeve 51 is a stepped ring surface, and the axial length of each stepped ring surface is continuously reduced along the direction from right to left; the left end surface of the outer sleeve 52 is a stepped ring surface, the axial length of each stepped ring surface is continuously reduced along the direction from left to right, the right end surface of the outer sleeve 52 is a stepped ring surface, and the axial length of each stepped ring surface is continuously reduced along the direction from right to left; the stepped ring surfaces of the inner sleeve 51 and the outer sleeve 52 are symmetrical to each other, and the tops of the inner sleeve 51 and the outer sleeve 52 are connected with each other;
The left pole shoe ring 3 is arranged on the inner wall of the shell 2, and a gap is reserved between the outer circular surface of the left pole shoe ring and the shaft 1; the right end face of the left pole shoe ring 3 is of a stepped ring surface structure, each stepped ring surface is arranged corresponding to each stepped ring surface of the left end face of the inner sleeve 51 and the left end face of the outer sleeve 52 respectively, and a gap is reserved between each stepped ring surface and the outer circular surface of the right end face of the left pole shoe ring 3 and the stepped ring surface and the inner circular surface of the left end face of the inner sleeve 51 or the outer sleeve 52 respectively corresponding to the stepped ring surface and the inner circular surface;
the right pole shoe ring 4 is arranged on the inner wall of the shell 2, a gap is reserved between the outer circular surface of the right pole shoe ring and the shaft 1, the left end surface of the right pole shoe ring 4 is of a stepped ring surface structure, each stepped ring surface is respectively arranged corresponding to each stepped ring surface of the right end surface of the inner sleeve 51 and the outer sleeve 52, and a gap is reserved between each stepped ring surface and the outer circular surface of the left end surface of the right pole shoe ring 3 and the stepped ring surface and the inner circular surface of the right end surface of the inner sleeve 51 or the outer sleeve 52 corresponding to the stepped;
a ring groove I and a ring groove II are respectively arranged on the stepped ring surface and the outer circular surface on the right end surface of the left pole shoe ring 3; a permanent magnet ring I7 is arranged in the annular groove I, the permanent magnet ring I7 axially extends towards the stepped annular surface on the left end surface of the inner sleeve 51 or the outer sleeve 52, a gap is reserved between the permanent magnet ring I7 and the stepped annular surface, and the gap is filled with magnetic fluid for sealing; a permanent magnet ring II8 is arranged in the ring groove II, the permanent magnet ring II8 extends to the inner circular surface on the left end surface of the inner sleeve 51 or the outer sleeve 52 along the radial direction, a gap is reserved between the permanent magnet ring II8 and the inner circular surface, and the gap is filled with magnetic fluid for sealing;
A ring groove III and a ring groove IV are respectively arranged on the stepped ring surface and the outer circular surface on the left end surface of the right pole shoe ring 4; a permanent magnet ring III9 is arranged in the ring groove III, the permanent magnet ring III9 axially extends towards a stepped ring surface on the right end surface of the inner sleeve 51 or the outer sleeve 52, a gap is reserved between the permanent magnet ring III9 and the stepped ring surface, and the gap is filled with magnetic fluid for sealing; the ring groove IV is internally provided with a permanent magnet ring IV 10, the permanent magnet ring IV 10 extends to the inner circular surface on the right end surface of the inner sleeve 51 or the outer sleeve 52 along the radial direction, a gap is reserved between the permanent magnet ring IV 10 and the inner circular surface, and the gap is filled with magnetic fluid for sealing.
the left end face and the right end face of the inner sleeve 51 and the outer sleeve 52 are symmetrical to each other.
2-5 permanent magnet rings I7 and II8 are respectively arranged; the permanent magnet ring I7 and the permanent magnet ring II8 are both composed of a plurality of split permanent magnets.
the number of the permanent magnet rings III9 and IV 10 is 2-5 respectively, and the permanent magnet rings III9 and IV 10 are both composed of a plurality of split permanent magnets.
The gap between the permanent magnet ring I7 and the stepped ring surface on the left end surface of the inner sleeve 51 or the outer sleeve 52 is 0.05 ~ 3 mm;
The gap between the permanent magnet ring II8 and the inner circular surface on the left end surface of the inner sleeve 51 or the outer sleeve 52 is 0.05 ~ 3 mm;
the gap between the permanent magnet ring III9 and the stepped ring surface on the right end surface of the inner sleeve 51 or the outer sleeve 52 is 0.05 ~ 3 mm;
The gap between the permanent magnet ring IV 10 and the inner circular surface on the right end surface of the inner sleeve 51 or the outer sleeve 52 is 0.05 ~ 3 mm.
the permanent magnet ring I7 and the permanent magnet ring III9 are axial magnetizing permanent magnets, the directions of magnetic lines of force of the adjacent permanent magnet ring I7 are opposite, and the directions of magnetic lines of force of the adjacent permanent magnet ring III9 are opposite.
the permanent magnet ring II8 and the permanent magnet ring IV 10 are radial magnetizing permanent magnets, the direction of the magnetic force lines of each permanent magnet ring II8 is the same, and the direction of the magnetic force lines of each permanent magnet ring IV 10 is the same.
The outer circular surfaces of the left pole shoe ring 3 and the right pole shoe ring 4 are respectively provided with a groove, and a sealing ring 11 is arranged in each groove.
The symmetrical step-type magnetic fluid sealing device further comprises two magnetism isolating rings 12, wherein the magnetism isolating rings 12 are arranged on the inner wall of the shell 2 and are respectively positioned on the left side of the left pole shoe ring 3 and the right side of the right pole shoe ring 4.
The symmetrical step-type magnetic fluid sealing device further comprises a left bearing 13 and a right bearing 14; the left bearing 3 and the right bearing 14 are respectively sleeved on the shaft 1, and the left bearing 9 is arranged on the left side of the magnetism isolating ring 12 at the left end; the right bearing 10 is arranged on the right side of the magnetism isolating ring 12 at the right end.
Claims (10)
1. the utility model provides a symmetry notch cuttype magnetic current body sealing device, includes shell (2), left pole shoe ring (3), right pole shoe ring (4), middle pole shoe ring (5), outer pole shoe ring (6), permanent magnet ring I (7), permanent magnet ring II (8), permanent magnet ring III (9), permanent magnet ring IV (10), its characterized in that:
The middle pole shoe ring (5) is sleeved on the shaft (1), the outer pole shoe ring (6) is arranged on the inner wall of the shell (2), the middle pole shoe ring (5) and the outer pole shoe ring (6) correspond to each other, and a gap is reserved between the middle pole shoe ring (5) and the outer pole shoe ring (6);
The middle pole shoe ring (5) comprises an inner sleeve and an outer sleeve, wherein the inner sleeve and the outer sleeve are both in a stepped sleeve structure; the left end surface of the inner sleeve is a stepped ring surface, the axial length of each stepped ring surface is continuously reduced along the direction from left to right, the right end surface of the inner sleeve is a stepped ring surface, and the axial length of each stepped ring surface is continuously reduced along the direction from right to left; the left end face of the outer sleeve is a stepped ring face, the axial length of each stepped ring face is continuously reduced along the direction from left to right, the right end face of the outer sleeve is a stepped ring face, and the axial length of each stepped ring face is continuously reduced along the direction from right to left; the stepped ring surfaces of the inner sleeve and the outer sleeve are symmetrical, and the tops of the inner sleeve and the outer sleeve are connected with each other;
the left pole shoe ring (3) is arranged on the inner wall of the shell (2), and a gap is reserved between the outer circular surface of the left pole shoe ring and the shaft (1); the right end face of the left pole shoe ring (3) is of a stepped ring surface structure, each stepped ring surface is arranged corresponding to each stepped ring surface of the left end face of the inner sleeve and the left end face of the outer sleeve respectively, and a gap is reserved between each stepped ring surface and the outer circular surface of the right end face of the left pole shoe ring (3) and the stepped ring surface and the inner circular surface of the left end face of the inner sleeve or the outer sleeve respectively corresponding to the stepped ring surface and the inner circular;
The right pole shoe ring (4) is arranged on the inner wall of the shell (2), a gap is reserved between the outer circular surface of the right pole shoe ring and the shaft (1), the left end surface of the right pole shoe ring (4) is of a stepped ring surface structure, each stepped ring surface is arranged corresponding to each stepped ring surface of the right end surface of the inner sleeve and the outer sleeve respectively, and a gap is reserved between each stepped ring surface and the outer circular surface of the left end surface of the right pole shoe ring (4) and the stepped ring surface and the inner circular surface of the right end surface of the inner sleeve or the outer sleeve respectively;
A ring groove I and a ring groove II are respectively arranged on the stepped ring surface and the outer circular surface on the right end surface of the left pole shoe ring (3); a permanent magnet ring I (7) is arranged in the annular groove I, the permanent magnet ring I (7) axially extends towards the stepped ring surface on the left end surface of the inner sleeve or the outer sleeve, a gap is reserved between the permanent magnet ring I and the stepped ring surface, and the gap is filled with magnetic fluid for sealing; a permanent magnet ring II (8) is arranged in the ring groove II, the permanent magnet ring II (8) extends to the inner circular surface on the left end surface of the inner sleeve or the outer sleeve along the radial direction, a gap is reserved between the permanent magnet ring II and the inner circular surface, and the gap is filled with magnetic fluid for sealing;
A ring groove III and a ring groove IV are respectively arranged on the stepped ring surface and the outer circular surface on the left end surface of the right pole shoe ring (4); the ring groove III is internally provided with a permanent magnet ring III (9), the permanent magnet ring III (9) axially extends towards the stepped ring surface on the right end surface of the inner sleeve or the outer sleeve, a gap is reserved between the permanent magnet ring III (9) and the stepped ring surface, and the gap is filled with magnetic fluid for sealing; and a permanent magnet ring IV (10) is arranged in the annular groove IV, the permanent magnet ring IV (10) extends to the inner circular surface on the right end surface of the inner sleeve or the outer sleeve along the radial direction, a gap is reserved between the permanent magnet ring IV and the inner circular surface, and the gap is filled with magnetic fluid for sealing.
2. The symmetric stepped magnetic fluid seal device according to claim 1, wherein: the left end face and the right end face of the inner sleeve and the outer sleeve are symmetrical to each other.
3. The symmetric stepped magnetic fluid seal device according to claim 1, wherein: 2-5 permanent magnet rings I (7) and II (8) are respectively arranged; the permanent magnet ring I (7) and the permanent magnet ring II (8) are both composed of a plurality of split permanent magnets.
4. The symmetric stepped magnetic fluid seal device according to claim 1, wherein: the number of the permanent magnet rings III (9) and the number of the permanent magnet rings IV (10) are respectively 2-5, and the permanent magnet rings III (9) and the permanent magnet rings IV (10) are respectively composed of a plurality of split permanent magnets.
5. The symmetric stepped magnetic fluid seal device according to claim 1, wherein:
The gap between the permanent magnet ring I (7) and the stepped ring surface on the left end surface of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm;
The gap between the permanent magnet ring II (8) and the inner circular surface on the left end surface of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm;
The gap between the permanent magnet ring III (9) and the stepped ring surface on the right end surface of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm;
The size of a gap between the permanent magnet ring IV (10) and the inner circular surface on the right end surface of the inner sleeve or the outer sleeve is 0.05 ~ 3 mm.
6. The symmetric stepped magnetic fluid seal device according to claim 1, wherein: the permanent magnet rings I (7) and the permanent magnet rings III (9) are axial magnetizing permanent magnets, the directions of magnetic lines of force of the adjacent permanent magnet rings I (7) are opposite, and the directions of magnetic lines of force of the adjacent permanent magnet rings III (9) are opposite.
7. The symmetric stepped magnetic fluid seal device according to claim 1, wherein:
The permanent magnet rings II (8) and the permanent magnet rings IV (10) are radial magnetizing permanent magnets, the directions of the magnetic lines of force of the permanent magnet rings II (8) are the same, and the directions of the magnetic lines of force of the permanent magnet rings IV (10) are the same.
8. The symmetric stepped magnetic fluid seal device according to claim 1, wherein:
The outer circular surfaces of the left pole shoe ring (3) and the right pole shoe ring (4) are respectively provided with a groove, and a sealing ring (11) is arranged in each groove.
9. the symmetric stepped magnetic fluid seal device according to claim 1, wherein: the magnetic isolation ring is characterized by further comprising two magnetic isolation rings (12), wherein the magnetic isolation rings (12) are arranged on the inner wall of the shell (2) and are respectively positioned on the left side of the left pole shoe ring (3) and the right side of the right pole shoe ring (4).
10. the symmetric stepped magnetic fluid seal device according to claim 9, wherein: the device also comprises a left bearing (13) and a right bearing (14); the left bearing (13) and the right bearing (14) are respectively sleeved on the shaft (1), and the left bearing (13) is arranged on the left side of the magnetism isolating ring (12) at the left end; the right bearing (14) is arranged on the right side of the magnetism isolating ring (12) at the right end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017129.8A CN108843792B (en) | 2018-09-03 | 2018-09-03 | Symmetrical step-type magnetic fluid sealing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017129.8A CN108843792B (en) | 2018-09-03 | 2018-09-03 | Symmetrical step-type magnetic fluid sealing device |
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| CN108843792A CN108843792A (en) | 2018-11-20 |
| CN108843792B true CN108843792B (en) | 2019-12-10 |
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| CN201811017129.8A Active CN108843792B (en) | 2018-09-03 | 2018-09-03 | Symmetrical step-type magnetic fluid sealing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2205309C2 (en) * | 2001-06-09 | 2003-05-27 | Михалев Юрий Олегович | Magnetic fluid seal |
| CN103498939A (en) * | 2013-08-27 | 2014-01-08 | 北京交通大学 | Sealing device for improving sealing anti-pressure capability and sealing reliability of magnetic liquid |
| CN104455462A (en) * | 2014-09-29 | 2015-03-25 | 北京交通大学 | Magnetic liquid sealing device with labyrinth structure formed in pole shoes |
| CN105570468A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical 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 |
-
2018
- 2018-09-03 CN CN201811017129.8A patent/CN108843792B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2205309C2 (en) * | 2001-06-09 | 2003-05-27 | Михалев Юрий Олегович | Magnetic fluid seal |
| CN103498939A (en) * | 2013-08-27 | 2014-01-08 | 北京交通大学 | Sealing device for improving sealing anti-pressure capability and sealing reliability of magnetic liquid |
| CN104455462A (en) * | 2014-09-29 | 2015-03-25 | 北京交通大学 | Magnetic liquid sealing device with labyrinth structure formed in pole shoes |
| CN105570468A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical 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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| CN108843792A (en) | 2018-11-20 |
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