CN112377622B - Double-magnetic-source magnetic liquid sealing device suitable for high-speed rotary sealing - Google Patents
Double-magnetic-source magnetic liquid sealing device suitable for high-speed rotary sealing Download PDFInfo
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- CN112377622B CN112377622B CN202011259274.4A CN202011259274A CN112377622B CN 112377622 B CN112377622 B CN 112377622B CN 202011259274 A CN202011259274 A CN 202011259274A CN 112377622 B CN112377622 B CN 112377622B
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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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- 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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3444—Pressing means by magnetic attraction
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
A double-magnetic source magnetic liquid sealing device suitable for high-speed rotary sealing belongs to the technical field of mechanical engineering sealing, and is particularly suitable for sealing a high-speed rotating shaft which generates a large centrifugal force and the rotating shaft which generates radial and axial micromotion. The sealing structure is additionally provided with a new magnetic source on the basis of single magnetic source shaft diameter bidirectional sealing, provides a sealing form of double magnetic sources, and is additionally provided with a new magnetic liquid sealing ring. Under the action of a new magnetic source, the newly added sealing ring in the double-magnetic-source sealing structure can solve the influence of centrifugal force on sealing failure. The new magnetic source may also enhance the magnetic induction of the axial-radial seal gap.
Description
Technical Field
The invention relates to a double-magnetic-source magnetic liquid seal suitable for high-speed rotary sealing, which belongs to the technical field of mechanical engineering sealing and is particularly suitable for sealing a high-speed rotating shaft which generates a larger centrifugal force and the rotating shaft which generates radial and axial micromotion.
Background
The magnetic liquid sealing technology is that magnetic liquid is used as a sealing material, the magnetic liquid is deformed under the action of an external magnetic field, an O-shaped ring is formed in a sealing gap, and when the magnetic liquid is deformed and fills the whole sealing gap, the sealing effect can be achieved. For the magnetic liquid, the magnetic liquid is in a liquid state under the action of no external magnetic field, and is in a solid-like state under the action of the external magnetic field. The advantages of zero leakage, high reliability, long service life and the like of the magnetic liquid are fully shown in the sealing field just because of the special expression form of the magnetic liquid. The magnetic liquid seal is widely applied to the fields of aerospace, large-scale mechanical equipment, medical treatment and the like.
The main shaft of some mechanical equipment is in high-speed rotation in actual working condition, and the sealing structure and the rotating shaft are in relative motion, so that inevitable friction and abrasion can occur between the sealing structure and the rotating shaft, further the sealing element is caused to lose efficacy, and the problems of short sealing service life, low reliability and the like exist. The two dynamic sealing properties of the spiral seal and the labyrinth seal have no problem of friction and wear, but have the problem of leakage. In order to solve the problems of common leakage and sealing element failure, the novel magnetic liquid sealing technology solves the problems and has the advantages of no abrasion, zero leakage and the like compared with the traditional sealing mode. When the magnetic liquid seal is applied to a high-speed condition, the centrifugal force generated at a high speed can have a large influence on the sealing effect of the magnetic liquid, and the radial and axial micromotion caused by the high speed can also cause the problem of sealing failure. Aiming at the series of problems, in order to improve the sealing performance of the magnetic liquid, the sealing structure is optimized, so that the sealing effect is ensured under the high-speed working condition.
Disclosure of Invention
The invention aims to solve the problem that under the high-rotation-speed working of a rotating shaft, magnetic liquid fails under the action of centrifugal force, and meanwhile, under the high-rotation-speed working condition, the situation of sealing failure caused by radial and axial micromotion occurs. According to the series of problems, a new magnetic source and a new sealing ring are added on the basis of single-magnetic-source axial-radial bidirectional sealing, a sealing form of double magnetic sources is provided, the new magnetic source can enhance the magnetic induction intensity of a magnetic loop, the radial and axial bidirectional sealing protection performance is improved, and the influence of centrifugal force on sealing failure can be solved by the newly added sealing ring.
The technical scheme adopted by the invention for solving the technical problems is as follows:
connections between the various components making up the device: installing a first bearing into the inner cavity of a shell, installing a first magnetism isolating ring on the right side of the first bearing, installing a first static ring provided with a rubber sealing ring into the inner cavity of the shell to the right side of the first magnetism isolating ring, installing the rubber sealing ring in a first movable ring and a second movable ring, fixedly connecting the first movable ring and a non-magnetism-conducting shaft sleeve with a magnetic-conducting shaft sleeve by using a fastening screw, installing a second permanent magnet on the right side of the first movable ring, installing the second movable ring on the right side of the first permanent magnet, fixedly connecting the second movable ring and the non-magnetism-conducting shaft sleeve by using the fastening screw, completing the positioning and fixing of the first movable ring and the second movable ring, forming a movable ring assembly by the first movable ring, the first permanent magnet, the second movable ring and the non-magnetism-conducting shaft sleeve, arranging the second magnetism isolating ring, the first magnetic-conducting ring, the first permanent magnet, the second magnetic-conducting ring and the third magnetism isolating ring in sequence, adding a magnetic liquid, arranging the magnetic liquid with the first movable ring, the second permanent magnet, the second magnetic ring and the magnetism isolating ring, A movable ring assembly consisting of a second movable ring, a non-magnetic-conductive shaft sleeve and a magnetic-conductive shaft sleeve is simultaneously installed in the inner cavity of the shell, a first bearing gland is fixedly connected with the magnetic-conductive shaft sleeve to complete the primary positioning of the movable ring assembly, the second movable ring is installed to the right side of a third magnetism isolating ring, magnetic liquid is added, a fourth magnetism isolating ring is installed to the right side of the second movable ring, a second bearing is installed in the inner cavity of the shell, and the first bearing, the second bearing and the magnetic-conductive shaft sleeve are in interference fit; fixing a second bearing cover and a third bearing cover on the shell and the magnetic conductive shaft sleeve respectively; this sealing device is under the high-speed circumstances of revolving shaft operation, magnetic liquid can remove first rotating ring, the outside of second rotating ring under the effect of centrifugal force, the utmost point tooth and the first permanent magnet in first rotating ring, the second rotating ring outside, first magnetic ring, the sealed effect can be guaranteed to the second magnetic ring, the device increases a magnetic source on single magnetic source sealed basis, adopt the sealed form of two magnetic sources promptly, both can guarantee when receiving the centrifugal force effect, the sealed effect in first rotating ring 22 and the 20 outsides of second rotating ring, still can strengthen the magnetic induction strength in axial and radial seal clearance, under the circumstances that the revolving shaft fine motion appears, realize the two-way sealed fail safe in axle footpath.
The structure adopts double magnetic sources, the first permanent magnet and the second permanent magnet provide the magnetic sources, and a first magnetic loop is formed by the first permanent magnet, the first magnetic conduction ring, the first moving ring, the first static ring, the magnetic conduction shaft sleeve, the second moving ring and the second magnetic conduction ring in sequence; a second magnetic loop is formed by the second permanent magnet, the first moving ring, the first static ring, the magnetic conductivity shaft sleeve, the second static ring and the second moving ring in sequence, and the magnetic lines of force of the two magnetic loops jointly pass through the first moving ring, the first static ring, the magnetic conductivity shaft sleeve, the second static ring and the second moving ring; the second magnetism isolating ring and the third magnetism isolating ring play a role in isolating magnetism, and a complete magnetic loop is formed by the double magnetic sources.
The first permanent magnet and the second permanent magnet are arranged in the following mode: first permanent magnet and the coaxial placing of second permanent magnet, with both same poles of the body place in same one side, two magnetic sources adopt parallelly connected the placing, such form of placing plays the effect that improves magnetic induction intensity when can guaranteeing that first permanent magnet and second permanent magnet provide the magnetic source, and improves the sealing capacity in sealed clearance.
The structure adopts a double-shaft sleeve structure, the first movable ring and the second movable ring are arranged on the non-magnetic-conductive shaft sleeve, the non-magnetic-conductive shaft sleeve plays a role in magnetic isolation, the magnetic-conductive shaft sleeve can ensure that a magnetic source forms a complete magnetic loop and is fixedly connected with the rotating shaft, and when the sealing device works normally, the movable ring assembly formed by the first movable ring, the second permanent magnet, the non-magnetic-conductive shaft sleeve and the magnetic-conductive shaft sleeve rotates synchronously along with the rotating shaft.
The annular inner circles of the first static ring and the second static ring are provided with rectangular teeth; one end face of the first movable ring and one end face of the second movable ring are provided with rectangular teeth, and the outer side face of the first movable ring and the outer side face of the second movable ring are provided with rectangular teeth; a first group of axial sealing gaps are formed among the first magnetic conduction ring, the second magnetic conduction ring, the outer side surface of the first movable ring and the outer side surface of the second movable ring, and the sealing performance at the positions plays a main sealing role under the condition of larger centrifugal force; the inner ring surface of the first static ring, the inner ring surface of the second static ring and the magnetic conductive shaft sleeve form a second group of axial sealing gaps, and the end surfaces of the first static ring and the first moving ring and the end surfaces of the second static ring and the second moving ring form radial sealing gaps. The first group of axial seals, the second group of axial seals and the radial seals form three groups of sealing rings of the sealing device, and the second group of sealing gaps and the radial sealing gaps are combined in a sealing mode, so that the axial and radial bidirectional sealing failure protection can be achieved under the condition that the revolving shaft is slightly moved.
The invention has the beneficial effects that:
the invention adds a new magnetic source and a new sealing ring on the basis of single magnetic source axial-radial bidirectional sealing, provides a sealing form of double magnetic sources, and two permanent magnets provide magnetic sources for radial sealing and axial sealing. The new magnetic source can enhance the magnetic induction intensity of the magnetic loop and improve the performance of radial and axial bidirectional sealing protection. The combination of the radial seal and the axial seal on the rotating shaft in two different directions can form a complementary relationship between the radial seal and the axial seal on the rotating shaft under the condition of radial micromotion and axial micromotion, namely the bidirectional seal protection effect. For high-speed rotary sealing, the main shaft generates larger centrifugal force under high-speed operation, and the radial sealing gap and the axial sealing gap on the rotating shaft can be in failure. Under the effect of centrifugal force, the magnetic liquid film in the radial seal clearance and the axial seal clearance on the revolving shaft can be destroyed, and the magnetic liquid can assemble in the lateral surface of first rotating ring and second rotating ring and the seal clearance of first magnetic ring and second magnetic ring, and at this moment, under the effect of first permanent magnet, the new sealing ring that magnetic liquid can form in this clearance plays the sealing effect, guarantees whole sealing device's sealed effect.
Drawings
Fig. 1 is a double-magnetic source magnetic liquid sealing device suitable for high-speed rotary sealing.
Fig. 2 is a schematic diagram of a magnetic circuit of a double-magnetic-source magnetic liquid sealing device suitable for high-speed rotary sealing.
In fig. 1: the magnetic bearing comprises a rotating shaft 1, a magnetic conductivity shaft sleeve 2, a first bearing cover 3, a shell 4, a first bearing 5, a first magnetism isolating ring 6, a rubber sealing ring 7, a second magnetism isolating ring 8, a first magnetism isolating ring 9, a first permanent magnet 10, a second magnetism isolating ring 11, a third magnetism isolating ring 12, a fourth magnetism isolating ring 13, a second bearing 14, a second bearing cover 15, a third bearing cover 16, magnetic liquid 17, a magnetism non-conducting shaft sleeve 18, a second static ring 19, a second dynamic ring 20, a second permanent magnet 21, a first dynamic ring 22 and a first static ring 23.
Detailed Description
The invention is further illustrated by the following detailed description of the embodiments:
a dual magnetic source magnetic fluid seal apparatus adapted for high speed rotary seals, the apparatus comprising: the magnetic bearing comprises a rotating shaft 1, a magnetic conductivity shaft sleeve 2, a first bearing cover 3, a shell 4, a first bearing 5, a first magnetism isolating ring 6, a rubber sealing ring 7, a second magnetism isolating ring 8, a first magnetism isolating ring 9, a first permanent magnet 10, a second magnetism isolating ring 11, a third magnetism isolating ring 12, a fourth magnetism isolating ring 13, a second bearing 14, a second bearing cover 15, a third bearing cover 16, magnetic liquid 17, a magnetism non-conducting shaft sleeve 18, a second static ring 19, a second dynamic ring 20, a second permanent magnet 21, a first dynamic ring 22 and a first static ring 23.
Connection between the components of the device: during assembly, the first bearing 3 is arranged in the inner cavity of the shell 4, the first magnetism isolating ring 6 is arranged on the right side of the first bearing 5, the first static ring 23 provided with the rubber sealing ring 7 is arranged in the inner cavity of the shell 4 to the right side of the first magnetism isolating ring 6, the rubber sealing ring is arranged in the first movable ring 22 and the second movable ring 20, the first movable ring 22 and the non-magnetism-conducting shaft sleeve 18 are fixedly connected with the magnetism-conducting shaft sleeve 2 through fastening screws, the second permanent magnet 21 is arranged on the right side of the first movable ring 22, the second movable ring 20 is arranged on the right side of the first permanent magnet 10, the second movable ring 20 and the non-magnetism-conducting shaft sleeve 18 are fixedly connected through the fastening screws, positioning and fixing of the first movable ring 22 and the second movable ring 20 are completed, the first movable ring 22, the first permanent magnet 10, the second movable ring 20 and the non-magnetism-conducting shaft sleeve 18 form a movable ring assembly, and the second magnetism isolating ring 8, the first magnetism conducting ring 9, the first permanent magnet 10, the second magnetism conducting ring 11, the second magnetism conducting ring 9, the second permanent magnet 10 and the magnetism conducting ring 11, The third magnetism isolating ring 12 is arranged in sequence, magnetic liquid 17 is added, a moving ring assembly formed by the first moving ring 22, the second permanent magnet 21, the second moving ring 20, the magnetism non-conducting shaft sleeve 18 and the magnetism conducting shaft sleeve 2 is simultaneously installed in the inner cavity of the shell 4, the first bearing gland 3 is fixedly connected with the magnetism conducting shaft sleeve 2 to complete the primary positioning of the moving ring assembly, the second moving ring 20 is installed on the right side of the third magnetism isolating ring 12, the magnetic liquid 17 is added, the fourth magnetism isolating ring 13 is installed on the right side of the second moving ring 20, the second bearing 14 is installed in the inner cavity of the shell 4, and the first bearing 5 and the second bearing 14 are in interference fit with the magnetism conducting shaft sleeve 2; the second bearing cap 15 and the third bearing cap 16 are fixed to the casing 4 and the magnetically permeable sleeve 2, respectively.
As shown in fig. 2: the structure adopts double magnetic sources, the first permanent magnet 10 and the second permanent magnet 21 provide the magnetic sources, and a first magnetic loop is formed by the first permanent magnet 10, the first magnetic conductive ring 9, the first moving ring 22, the first static ring 23, the magnetic conductive shaft sleeve 2, the second moving ring 20 and the second magnetic conductive ring 11 in sequence; a second permanent magnet 21, a first movable ring 22, a first stationary ring 23, a magnetic conductivity shaft sleeve 2, a second stationary ring 19 and a second movable ring 20 form a second magnetic loop in sequence, and magnetic lines of force of the two magnetic loops jointly pass through the first movable ring 22, the first stationary ring 23, the magnetic conductivity shaft sleeve 2, the second stationary ring 19 and the second movable ring 20; the second magnetism isolating ring 8 and the third magnetism isolating ring 12 play a role in magnetism isolating, and a complete magnetic loop is formed by the double magnetic sources.
The first permanent magnet 10 and the second permanent magnet 21 are made of neodymium iron boron materials.
The rotating shaft 1, the magnetic-conductive shaft sleeve 2, the first magnetic-conductive ring 9, the second magnetic-conductive ring 11, the second static ring 19, the second dynamic ring 20, the first dynamic ring 22 and the first static ring 23 are made of magnetic-conductive materials.
The first bearing cover 3, the shell 4, the first magnetism isolating ring 6, the second magnetism isolating ring 8, the third magnetism isolating ring 12, the fourth magnetism isolating ring 13, the second bearing cover 15, the third bearing cover 16 and the magnetism non-conducting shaft sleeve 18 are made of magnetism non-conducting materials.
The magnetic liquid 17 may be selected from kerosene-based or ester-based magnetic liquids.
Claims (4)
1. A dual magnetic source magnetic fluid seal apparatus adapted for high speed rotary seals, the apparatus comprising: the magnetic bearing comprises a rotating shaft (1), a magnetic conductive shaft sleeve (2), a first bearing cover (3), a shell (4), a first bearing (5), a first magnetism isolating ring (6), a rubber sealing ring (7), a second magnetism isolating ring (8), a first magnetism conducting ring (9), a first permanent magnet (10), a second magnetism conducting ring (11), a third magnetism isolating ring (12), a fourth magnetism isolating ring (13), a second bearing (14), a second bearing cover (15), a third bearing cover (16), magnetic liquid (17), a non-magnetic conductive shaft sleeve (18), a second static ring (19), a second dynamic ring (20), a second permanent magnet (21), a first dynamic ring (22) and a first static ring (23);
connection between each part: the first bearing (5) is arranged in the inner cavity of the shell (4), the first magnetism isolating ring (6) is arranged on the right side of the first bearing (5), the first static ring (23) provided with the rubber sealing ring (7) is arranged in the inner cavity of the shell (4) to the right side of the first magnetism isolating ring (6), the rubber sealing ring is arranged in the first movable ring (22) and the second movable ring (20), the first movable ring (22) and the non-magnetic sleeve (18) are fixedly connected with the magnetic sleeve (2) by fastening screws, the second permanent magnet (21) is arranged on the right side of the first movable ring (22), the second movable ring (20) is arranged on the right side of the second permanent magnet (21), the second movable ring (20) and the non-magnetic sleeve (18) are fixedly connected by the fastening screws, the first movable ring (22) and the second movable ring (20) are positioned and fixed, the first movable ring (22), the second permanent magnet (21), the second movable ring (20) and the non-magnetic sleeve (18) form a movable ring assembly, the second magnetism isolating ring (8), the first magnetism conducting ring (9), the first permanent magnet (10), the second magnetism conducting ring (11) and the third magnetism isolating ring (12) are arranged in sequence, magnetic liquid (17) is added, a moving ring assembly consisting of a first moving ring (22), a second permanent magnet (21), a second moving ring (20), a non-magnetic-conduction shaft sleeve (18) and a magnetic-conduction shaft sleeve (2) is simultaneously installed in the inner cavity of the shell (4), a first bearing cover (3) is fixedly connected with the magnetic-conduction shaft sleeve (2) to finish the primary positioning of the moving ring assembly, a second fixed ring (19) is installed on the right side of a third magnetism isolating ring (12), magnetic liquid (17) is added, a fourth magnetism isolating ring (13) is installed on the right side of the second fixed ring (19), a second bearing (14) is installed in the inner cavity of the shell (4), and the first bearing (5) and the second bearing (14) are in interference fit with the magnetic-conduction shaft sleeve (2); a second bearing cover (15) and a third bearing cover (16) are respectively fixed on the shell (4) and the magnetic-conductivity shaft sleeve (2); the sealing device has the advantages that under the condition that a rotating shaft runs at a high speed, magnetic liquid (17) can move to the outer sides of the first movable ring (22) and the second movable ring (20) under the action of centrifugal force, the sealing effect can be guaranteed by pole teeth on the outer sides of the first movable ring (22) and the second movable ring (20), the first permanent magnet (10), the first magnetic conductive ring (9) and the second magnetic conductive ring (11), a magnetic source is added on the basis of single magnetic source sealing, namely, a sealing form of double magnetic sources is adopted, the sealing effect on the outer sides of the first movable ring (22) and the second movable ring (20) can be guaranteed when the centrifugal force acts, the magnetic induction intensity of an axial sealing gap and a radial sealing gap can be enhanced, and the axial and radial bidirectional sealing failure protection can be realized under the condition that the rotating shaft is slightly moved;
the sealing device adopts double magnetic sources, the first permanent magnet (10) and the second permanent magnet (21) provide the magnetic sources, and a first magnetic loop is formed by the first permanent magnet (10), the first magnetic conduction ring (9), the first moving ring (22), the first static ring (23), the magnetic conduction shaft sleeve (2), the second static ring (19), the second moving ring (20) and the second magnetic conduction ring (11) in sequence; a second permanent magnet (21), a first movable ring (22), a first stationary ring (23), a magnetic conductivity shaft sleeve (2), a second stationary ring (19) and a second movable ring (20) form a second magnetic loop in sequence, and magnetic lines of force of the two magnetic loops jointly pass through the first movable ring (22), the first stationary ring (23), the magnetic conductivity shaft sleeve (2), the second stationary ring (19) and the second movable ring (20); the second magnetism isolating ring (8) and the third magnetism isolating ring (12) play a role in magnetism isolation, and a complete magnetic loop is formed by the double magnetic sources.
2. The dual magnetic source magnetic fluid seal apparatus adapted for high speed rotary seals of claim 1, wherein:
the first permanent magnet (10) and the second permanent magnet (21) are arranged in a mode that: the first permanent magnet (10) and the second permanent magnet (21) are coaxially arranged, the same poles of the first permanent magnet and the second permanent magnet are arranged on the same side, and the double magnetic sources are arranged in parallel.
3. The dual magnetic source magnetic fluid seal apparatus adapted for high speed rotary seals of claim 1, wherein:
the sealing device adopts a double-shaft sleeve structure, a first movable ring (22) and a second movable ring (20) are arranged on a non-magnetic-conductive shaft sleeve (18), the non-magnetic-conductive shaft sleeve (18) plays a role in magnetic isolation, a magnetic-conductive shaft sleeve (2) can ensure that a magnetic source forms a complete magnetic loop and is fixedly connected with a rotating shaft (1), and when the sealing device works normally, a movable ring assembly consisting of the first movable ring (22), the second movable ring (20), a second permanent magnet (21), the non-magnetic-conductive shaft sleeve (18) and the magnetic-conductive shaft sleeve (2) rotates synchronously along with the rotating shaft.
4. The dual magnetic source magnetic fluid seal apparatus adapted for high speed rotary seals of claim 1, wherein:
the annular inner circles of the first static ring (23) and the second static ring (19) are provided with rectangular teeth; one end surfaces of the first movable ring (22) and the second movable ring (20) are provided with rectangular teeth, and the outer side surfaces of the first movable ring and the second movable ring are provided with rectangular teeth; a first group of axial sealing gaps are formed among the first magnetic conduction ring (9), the second magnetic conduction ring (11), the outer side surface of the first movable ring (22) and the outer side surface of the second movable ring (20), and the sealing performance at the positions plays a main sealing role under the condition of larger centrifugal force; a second group of axial sealing gaps are formed by the inner ring surface of the first static ring (23), the inner ring surface of the second static ring (19) and the magnetic-conductive shaft sleeve (2), and radial sealing gaps are formed by the end surface of the first static ring (23) and the end surface of the first movable ring (22), the end surface of the second static ring (19) and the end surface of the second movable ring (20); the first group of axial sealing gaps, the second group of axial sealing gaps and the radial sealing gaps form three groups of sealing rings of the sealing device, and the second group of sealing gaps and the radial sealing gaps are combined in a sealing mode, so that axial and radial bidirectional sealing failure protection can be achieved under the condition that the rotary shaft is slightly moved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011259274.4A CN112377622B (en) | 2020-11-12 | 2020-11-12 | Double-magnetic-source magnetic liquid sealing device suitable for high-speed rotary sealing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011259274.4A CN112377622B (en) | 2020-11-12 | 2020-11-12 | Double-magnetic-source magnetic liquid sealing device suitable for high-speed rotary sealing |
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| CN112377622A CN112377622A (en) | 2021-02-19 |
| CN112377622B true CN112377622B (en) | 2021-10-08 |
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| CN202011259274.4A Active CN112377622B (en) | 2020-11-12 | 2020-11-12 | Double-magnetic-source magnetic liquid sealing device suitable for high-speed rotary sealing |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112815097B (en) * | 2021-02-08 | 2021-11-19 | 清华大学 | Magnetic liquid sealing device adopting multiple magnetic sources |
| CN114719022B (en) * | 2022-04-01 | 2022-12-20 | 中国矿业大学 | Split shaft diameter combined type magnetic liquid sealing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544834A (en) * | 2003-11-18 | 2004-11-10 | 北京交通大学 | Low-temperature large diameter magnetic liquid sealing arrangement |
| CN108006233A (en) * | 2017-12-14 | 2018-05-08 | 广西科技大学 | A kind of telescopic device for sealing magnetic fluid of trapezoidal pole shoe |
| CN108980360A (en) * | 2018-08-13 | 2018-12-11 | 广西科技大学 | A kind of magnetic source parallel connection type magnetic fluid sealing structure |
| CN109764138A (en) * | 2019-01-31 | 2019-05-17 | 广西科技大学 | A kind of embedded type labyrinth type device for sealing magnetic fluid |
-
2020
- 2020-11-12 CN CN202011259274.4A patent/CN112377622B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544834A (en) * | 2003-11-18 | 2004-11-10 | 北京交通大学 | Low-temperature large diameter magnetic liquid sealing arrangement |
| CN108006233A (en) * | 2017-12-14 | 2018-05-08 | 广西科技大学 | A kind of telescopic device for sealing magnetic fluid of trapezoidal pole shoe |
| CN108980360A (en) * | 2018-08-13 | 2018-12-11 | 广西科技大学 | A kind of magnetic source parallel connection type magnetic fluid sealing structure |
| CN109764138A (en) * | 2019-01-31 | 2019-05-17 | 广西科技大学 | A kind of embedded type labyrinth type device for sealing magnetic fluid |
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| CN112377622A (en) | 2021-02-19 |
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