CN106015583B - A kind of symmetric form bayonet-type magnetic fluid seal device - Google Patents
A kind of symmetric form bayonet-type magnetic fluid seal device Download PDFInfo
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- CN106015583B CN106015583B CN201610599731.1A CN201610599731A CN106015583B CN 106015583 B CN106015583 B CN 106015583B CN 201610599731 A CN201610599731 A CN 201610599731A CN 106015583 B CN106015583 B CN 106015583B
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- annular groove
- pole
- pole shoe
- pole tooth
- tooth
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Classifications
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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 belongs to sealing field of mechanical engineering, and in particular to a kind of symmetric form bayonet-type magnetic fluid seal device, including middle pole shoe, left pole shoe, right pole shoe, permanent magnet, shell；Middle pole shoe is arranged on the middle part of axle, and the left side of middle pole shoe is opened up opens up annular groove I between multiple pole tooth I, two adjacent pole tooth I, and permanent magnet is provided with annular groove I；The right side of middle pole shoe is opened up and opens up annular groove II between multiple pole tooth II, two adjacent pole tooth II, and permanent magnet is provided with annular groove II；Left pole shoe and right pole shoe are respectively mounted in the left side and right side of middle pole shoe, the right side of left pole shoe opens up pole tooth III and annular groove III, the left side of right pole shoe opens up pole tooth IV and annular groove IV, pole tooth I is set to stretch into annular groove III, pole tooth III is stretched into annular groove I, pole tooth II is stretched into annular groove IV, and pole tooth IV is stretched into annular groove II.Performance that the sealing device is pressure-resistant is high, and sealing property is stable.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, and in particular to a kind of symmetric form bayonet-type magnetic fluid seal device.
Background technology
With economical growing, the association area such as industrial equipment requires more and more higher to sealing property, and traditional is close
Envelope mode has been difficult to the seal request for meeting some special occasions, and the development of magnetic fluid technique has promoted Magneticfluid Seal Technique
Development, Magneticfluid Seal Technique just playing an increasingly important role in field of sealing technology.Existing sealing structure, its sealing ring
It is straight ring type, when seal failure, the leakage rate of magnetic fluid is big, when under the conditions of applied to wide arc gap, sealing structure
Bearing capacity is low, it is difficult to meet the requirement of the special operation conditions such as high-speed overload.Other existing sealing device permanent magnet is between sealing
The magnetic circuit of gap is longer, causes the magnetic field force that magnetic fluid is subject in seal clearance not strong, the magnetic fluid when occurring seal failure
Loss amount is big.
The content of the invention
There is provided a kind of symmetric form bayonet-type magnetic fluid seal of good sealing effect for deficiency of the invention for present technology
Device.
Technical scheme is as follows：
A kind of symmetric form bayonet-type magnetic fluid seal device, including it is middle pole shoe, left pole shoe, right pole shoe, permanent magnet, outer
Shell；Described middle pole shoe is arranged on the middle part of axle, and the left side of middle pole shoe opens up multiple pole tooth I, two adjacent pole tooth I
Between open up annular groove I, permanent magnet is provided with annular groove I, the opposite polarity of the permanent magnet in two adjacent annular groove I；
The right side of middle pole shoe opens up and opens up annular groove II between multiple pole tooth II, two adjacent pole tooth II, in annular groove II
Provided with permanent magnet, the opposite polarity of the permanent magnet in two adjacent annular groove II；
Described left pole shoe is installed on the axle on the left of middle pole shoe, and multiple pole tooth III are opened up on the right side of left pole shoe
Each annular groove I of middle pole shoe left side is corresponded respectively with annular groove III, pole tooth III, and pole tooth III stretches into annular groove I
It is interior, leave gap between pole tooth III end and permanent magnet；Annular groove III corresponds each of middle pole shoe left side respectively
Individual pole tooth I, pole tooth I is stretched into annular groove III, and gap is left between pole tooth I end and annular groove III right side；In ring
Injection sealing medium in shape groove III, sealing medium is adsorbed on pole tooth I left side under the action of a magnetic force
Described right pole shoe is installed on the axle on the right side of middle pole shoe, and pole tooth IV and annular are opened up on the left side of right pole shoe
Groove IV, pole tooth IV corresponds each annular groove II of middle pole shoe right side respectively, and pole tooth IV is stretched into annular groove II, pole tooth
End and permanent magnet between leave gap；Annular groove IV corresponds each pole tooth II of middle pole shoe right side, pole respectively
Tooth II is stretched into annular groove IV, and gap is left between pole tooth II ends and the left side of annular groove IV；Injected in annular groove IV
Sealing medium, sealing medium is adsorbed on pole tooth II right side under the action of a magnetic force.
Also include jump ring, described jump ring is arranged on the axle of the middle pole shoe left and right sides, is close to middle pole shoe both sides.
Also include two bearings and two groups of magnetism-isolating loops, two groups of described magnetism-isolating loops are respectively provided on left pole shoe left side and the right side
On pole shoe right side, two bearings are installed on axle, are respectively provided at the left side of magnetism-isolating loop and right pole shoe on left pole shoe left side right
The right side of magnetism-isolating loop on end face.
Described magnetism-isolating loop includes outer magnetism-isolating loop and interior magnetism-isolating loop, and outer magnetism-isolating loop is installed on the inwall of shell, interior every magnetic
Ring is installed on axle, there is gap between outer magnetism-isolating loop and interior magnetism-isolating loop, and outer magnetism-isolating loop is identical with the axial length of interior magnetism-isolating loop.
Described permanent magnet is radial magnetizing type permanent magnet.
Groove I is opened up on the periphery of left pole shoe, groove II, described groove I are opened up on the periphery of right pole shoe
Rubber ring is installed with groove II.
Pole tooth I quantity is 2-8, and its radial height is 0.2-1mm, and annular groove I number is 1-7, annular groove I's
Radial height is 2-8mm；Pole tooth II is identical with pole tooth I quantity, size, annular groove II and annular groove I quantity, size phase
Together.
Described pole tooth III quantity is 2-8, and its radial height is 0.2-1mm；Annular groove III number is 2-8
Individual, its radial height is 2-8mm；Pole tooth IV is identical with pole tooth III quantity, size, annular groove IV and annular groove III number
Amount, size are identical.
Gap length between pole tooth I end and annular groove III right side is 0.1-5mm, pole tooth II ends and ring
Gap length between the left side of shape groove IV is 0.1-5mm.
Pole tooth I and pole tooth II are symmetrical relative to middle pole shoe.
The installation process of the present invention is as follows：Permanent magnet is separately mounted to the annular groove I and right-hand member of middle pole shoe left side
In the annular groove II in face, then by middle pole shoe be arranged on axle middle part, pacify respectively on the axle on the left side of middle pole shoe and right side
Assembling jump ring；Rubber ring is installed in the groove I of left pole shoe periphery, rubber ring is installed in the groove II of right pole shoe periphery,
Sealing medium is injected in the annular groove III of left pole shoe right side, sealing medium is magnetic fluid, the ring in right pole shoe left side
Injection sealing medium in shape groove IV, the sealing medium is magnetic fluid, then left pole shoe is arranged on to the axle in the left side of middle pole shoe
On, on the axle that right pole shoe is arranged on to the right side of middle pole shoe, the pole tooth I on the left of middle pole shoe is stretched into annular groove III, and
Contacted with the sealing medium in annular groove III, the pole tooth II on the right side of middle pole shoe is stretched into annular groove IV, and with annular groove IV
Interior sealing medium contact, while pole tooth III is stretched into the annular groove I on the left of middle pole shoe, and pole tooth III right part and ring
There is gap, the annular groove II that pole tooth IV is stretched on the right side of middle pole shoe, and a left side for pole tooth IV in the left part of the permanent magnet in shape groove I
There is gap in end and the right part of permanent magnet in annular groove II；Magnetism-isolating loop and bearing are installed successively in the left side of left pole shoe,
The right side of right pole shoe is installed by magnetism-isolating loop and bearing successively；Shell is mounted on an axle, makes jacket live in state what is be mounted on an axle
Part, makes to be close to the bearing positioned at left side on the inside of shell left end；Finally by the threaded connection of end cap and shell right-hand member, compress
Positioned at the outer ring of the bearing on right side.
The present invention opens up pole tooth and annular groove in middle pole shoe, and opens up pole tooth and annular on left pole shoe and right pole shoe
Groove, makes pole tooth position on middle pole shoe in the annular groove on left pole shoe and right pole shoe, and make the pole on left pole shoe and right pole shoe
Tooth position is in the annular groove of middle pole shoe, and the labyrinth seal structure of symmetric form bayonet-type, the bearing capacity of the sealing structure is strong, close
The loss amount of magnetic fluid is small during envelope failure, can meet the high sealing performance requirement under the special operation conditions such as high-speed overload；Dynode
Boots, left pole shoe, the pole tooth on right pole shoe and annular groove are multiple along being radially arranged for axle, form the radial seal ring of bayonet-type,
Influence of circular runout of the axle in rotation process to seal clearance size is reduced, so as to improve the stability of sealing property；
Permanent magnet is installed in the annular groove of middle pole shoe, the opposite polarity of adjacent permanent magnet substantially reduces permanent magnet to magnetic flow
Magnetic circuit at body seal clearance, increases magnetic field force of the permanent magnet to magnetic fluid, effectively reduces the loss of magnetic fluid, expand
The safe condition range of sealing device.
Brief description of the drawings
Fig. 1 is the magnetic fluid seal device of magnetic source tandem type
Each sequence number sign and corresponding structure title are as follows in figure：Outside magnetism-isolating loop in 1- axles, 2- shells, 3- bearings, 4-, 5-
Pole shoe in the middle of magnetism-isolating loop, the left pole shoes of 6-, 61- poles tooth III, 62- annular grooves III, 7-, 71- poles tooth I, 72- annular grooves I, 73- poles
The right pole shoe of tooth II, 74- annular groove II, 8-, 81- poles tooth IV, 82- poles tooth IV, 9- jump rings, 10- end caps, 11- grooves II, 12- is close
Seal medium, 13- permanent magnets, 14- grooves I.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of symmetric form bayonet-type magnetic fluid seal device, including middle pole shoe 7, left pole shoe 6, the right side
Pole shoe 8, permanent magnet 13, shell 2；Described middle pole shoe 7 is arranged on the middle part of axle 1, and the left side of middle pole shoe 7 opens up multiple
Annular groove I72 is opened up between pole tooth I71, two adjacent pole tooth I71, permanent magnet 13, adjacent two are provided with annular groove I72
The opposite polarity of permanent magnet 13 in individual annular groove I72；The right side of middle pole shoe 7 opens up multiple pole tooth II73, adjacent two
Annular groove II74 is opened up between individual pole tooth II73, permanent magnet 13, two adjacent annular groove II74 are provided with annular groove II74
In permanent magnet 13 opposite polarity；Pole tooth I71 and pole tooth II73 are symmetrical relative to middle pole shoe 7；
Described left pole shoe 6 is installed on the axle 1 in the middle left side of pole shoe 7, and multiple pole teeth are opened up on the right side of left pole shoe 6
III61 and annular groove III62, pole tooth III61 correspond each annular groove I72 of the middle left side of pole shoe 7, pole tooth respectively
III61 is stretched into annular groove I72, and gap is left between pole tooth III61 end and permanent magnet 13；Annular groove III62 difference one
Each pole tooth I71 of the one corresponding left side of dynode boots 7, pole tooth I71 are stretched into annular groove III62, pole tooth I71 end and ring
Gap is left between shape groove III62 right side, sealing medium 12 is injected in annular groove III62, sealing medium 12 is in magnetic field
On the left side that pole tooth I71 is adsorbed in the presence of power；
Described right pole shoe 8 is installed on the axle 1 on the middle right side of pole shoe 7, and pole tooth IV 81 is opened up on the left side of right pole shoe 8
With annular groove IV 82, pole tooth IV 81 corresponds each annular groove II74 of the middle right side of pole shoe 7 respectively, and pole tooth IV 81 is stretched into
In annular groove II74, gap is left between the end of pole tooth IV 81 and permanent magnet 13；In the middle of annular groove IV 82 is corresponded respectively
Each pole tooth II73 of the right side of pole shoe 7, pole tooth II73 are stretched into annular groove IV 82, pole tooth II73 ends and annular groove IV 82
Gap is left between left side, the injection sealing medium 12 in annular groove IV 82, sealing medium 12 is inhaled under the action of a magnetic force
On the right side for investing pole tooth II73.
Also include jump ring 9, described jump ring 9 is arranged on the axle 1 of the middle left and right sides of pole shoe 7, is close to middle 7 liang of pole shoe
Side.
Also include two bearings 3 and two groups of magnetism-isolating loops, two groups of described magnetism-isolating loops be respectively provided in the left left side of pole shoe 6 and
On the right right side of pole shoe 8, two bearings 3 are installed on axle 1, are respectively provided at the left side and the right side of magnetism-isolating loop on the left left side of pole shoe 6
The right side of magnetism-isolating loop on the right side of pole shoe 8.
Described magnetism-isolating loop includes outer magnetism-isolating loop 5 and interior magnetism-isolating loop 4, and outer magnetism-isolating loop 5 is installed on the inwall of shell 2, interior
Magnetism-isolating loop 4 is installed on axle 1, there is gap, the axle of outer magnetism-isolating loop 5 and interior magnetism-isolating loop 4 between outer magnetism-isolating loop 5 and interior magnetism-isolating loop 4
It is identical to length.
Described permanent magnet 13 is radial magnetizing type permanent magnet.
Groove I14 is opened up on the periphery of left pole shoe 6, groove II11 is opened up on the periphery of right pole shoe 8, it is described
Rubber ring is installed in groove I14 and groove II11.
Pole tooth I71 quantity is 2-8, and its radial height is 0.2-1mm, and annular groove I72 number is 1-7, annular
Groove I72 radial height is 2-8mm；Pole tooth II73 is identical with pole tooth I71 quantity, size, annular groove II74 and annular groove I72
Quantity, size it is identical.
Described pole tooth III61 quantity is 2-8, and its radial height is 0.2-1mm；Annular groove III62 number is
2-8, its radial height is 2-8mm；Pole tooth IV 81 is identical with pole tooth III61 quantity, size, annular groove IV 82 and annular groove
III62 quantity, size is identical.
Gap length between pole tooth I71 end and annular groove III62 right side is 0.1-5mm, pole tooth II73 ends
Gap length between end and the left side of annular groove IV 82 is 0.1-5mm.
The installation process of the present invention is as follows：By permanent magnet 13 be separately mounted to the middle left side of pole shoe 7 annular groove I72 and
In the annular groove II74 of right side, then by middle pole shoe 7 installed in the middle part of axle 1, the axle in the left side of middle pole shoe 7 and right side
Jump ring 9 is respectively mounted on 1；Rubber ring is installed in the groove I14 of the left periphery of pole shoe 6, in the groove of the right periphery of pole shoe 8
Rubber ring is installed in II11, sealing medium 12 is injected in the annular groove III62 of the left right side of pole shoe 6, sealing medium is magnetic
Fluid, the injection sealing medium 12 in the annular groove IV 82 of the right left side of pole shoe 8, the sealing medium is magnetic fluid, then by a left side
Pole shoe 6 is arranged on the axle 1 in the left side of middle pole shoe 7, on the axle 1 that right pole shoe 8 is arranged on to the right side of middle pole shoe 7, in making
Between the pole tooth I71 in the left side of pole shoe 7 stretch into annular groove III62, and contacted with the sealing medium in annular groove III62, make centre
The pole tooth II73 on the right side of pole shoe 7 is stretched into annular groove IV 82, and is contacted with the sealing medium in annular groove IV 82, while pole tooth
III61 is stretched into the annular groove I72 in the middle left side of pole shoe 7, and pole tooth III61 right part and the permanent magnet in annular groove I72
Left part there is gap, pole tooth IV 82 stretches into the annular groove II74 on the middle right side of pole shoe 7, and left part and the ring of pole tooth IV 82
In shape groove II74 there is gap in the right part of permanent magnet；Magnetism-isolating loop and bearing 3 are installed successively in the left side of left pole shoe 6, in right pole
The right side of boots 8 is installed by magnetism-isolating loop and bearing 3 successively；Shell 2 is arranged on axle 1, shell 2 is covered above-mentioned be arranged on axle 1
Part, make to be close to the bearing 3 positioned at left side on the inside of the left end of shell 2；Connect finally by the screw thread of end cap 10 and the right-hand member of shell 2
Connect, compress the outer ring of the bearing 3 positioned at right side.
Claims (10)
1. a kind of symmetric form bayonet-type magnetic fluid seal device, including middle pole shoe（7）, left pole shoe（6）, right pole shoe（8）, forever
Magnet（13）, shell（2）；It is characterized in that：
Described middle pole shoe（7）Installed in axle（1）Middle part, middle pole shoe（7）Left side open up multiple pole tooth I（71）,
Two adjacent pole tooth I（71）Between open up annular groove I（72）, in annular groove I（72）It is interior to be provided with permanent magnet（13）, adjacent two
Individual annular groove I（72）In permanent magnet（13）Opposite polarity；Middle pole shoe（7）Right side open up multiple pole tooth II（73）,
Two adjacent pole tooth II（73）Between open up annular groove II（74）, in annular groove II（74）It is interior to be provided with permanent magnet（13）, it is adjacent
Two annular groove II（74）In permanent magnet（13）Opposite polarity；
Described left pole shoe（6）It is installed on middle pole shoe（7）The axle in left side（1）On, left pole shoe（6）Right side on open up multiple
Pole tooth III（61）With annular groove III（62）, pole tooth III（61）Pole shoe in the middle of corresponding respectively（7）Each annular of left side
Groove I（72）, pole tooth III（61）Stretch into annular groove I（72）It is interior, pole tooth III（61）End and permanent magnet（13）Between leave between
Gap；Annular groove III（62）Pole shoe in the middle of corresponding respectively（7）Each pole tooth I of left side（71）, pole tooth I（71）Stretch into ring
Shape groove III（62）It is interior, pole tooth I（71）End and annular groove III（62）Right side between leave gap；
Described right pole shoe（8）It is installed on middle pole shoe（7）The axle on right side（1）On, right pole shoe（8）Left side on open up pole tooth
Ⅳ（81）With annular groove IV（82）, pole tooth IV（81）Pole shoe in the middle of corresponding respectively（7）Each annular groove II of right side
（74）, pole tooth IV（81）Stretch into annular groove II（74）It is interior, pole tooth IV（81）End and permanent magnet（13）Between leave gap；Ring
Shape groove IV（82）Pole shoe in the middle of corresponding respectively（7）Each pole tooth II of right side（73）, pole tooth II（73）Stretch into annular groove
Ⅳ（82）It is interior, pole tooth II（73）End and annular groove IV（82）Left side between leave gap.
2. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Also include jump ring（9）,
Described jump ring（9）Installed in middle pole shoe（7）The axle of the left and right sides（1）On, it is close to middle pole shoe（7）Both sides.
3. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Also include two bearings
（3）With two groups of magnetism-isolating loops, two groups of described magnetism-isolating loops are respectively provided in left pole shoe（6）Left side and right pole shoe（8）On right side,
Two bearings（3）It is installed on axle（1）On, it is respectively provided at left pole shoe（6）The left side of magnetism-isolating loop and right pole shoe on left side（8）Right-hand member
The right side of magnetism-isolating loop on face.
4. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 3, it is characterised in that：Described magnetism-isolating loop bag
Include outer magnetism-isolating loop（5）With interior magnetism-isolating loop（4）, outer magnetism-isolating loop（5）It is installed on shell（2）Inwall on, interior magnetism-isolating loop（4）It is installed on
Axle（1）On, outer magnetism-isolating loop（5）With interior magnetism-isolating loop（4）Between there is gap, outer magnetism-isolating loop（5）With interior magnetism-isolating loop（4）Axial direction it is long
Degree is identical.
5. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Described permanent magnet
（13）For radial magnetizing type permanent magnet.
6. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：In left pole shoe（6）'s
Groove I is opened up on periphery（14）, in right pole shoe（8）Periphery on open up groove II（11）, described groove I（14）With it is recessed
Groove II（11）Interior installation rubber ring.
7. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Pole tooth I（71）Number
Measure as 2-8, its radial height is 0.2-1mm, annular groove I（72）Number be 1-7, annular groove I（72）Radial height
For 2-8mm；Pole tooth II（73）With pole tooth I（71）Quantity, size it is identical, annular groove II（74）With annular groove I（72）Quantity,
Size is identical.
8. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Described pole tooth III
（61）Quantity be 2-8, its radial height is 0.2-1mm；Annular groove III（62）Number be 2-8, its radial height is
2-8mm；Pole tooth IV（81）With pole tooth III（61）Quantity, size it is identical, annular groove IV（82）With annular groove III（62）Number
Amount, size are identical.
9. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Described pole tooth I
（71）End and annular groove III（62）Right side between gap length be 0.1-5mm, pole tooth II（73）End and annular
Groove IV（82）Left side between gap length be 0.1-5mm.
10. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Described pole tooth I
（71）With pole tooth II（73）Relative to middle pole shoe（7）It is symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610599731.1A CN106015583B (en) | 2016-07-28 | 2016-07-28 | A kind of symmetric form bayonet-type magnetic fluid seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610599731.1A CN106015583B (en) | 2016-07-28 | 2016-07-28 | A kind of symmetric form bayonet-type magnetic fluid seal device |
Publications (2)
| Publication Number | Publication Date |
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| CN106015583A CN106015583A (en) | 2016-10-12 |
| CN106015583B true CN106015583B (en) | 2017-10-03 |
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| CN201610599731.1A Active CN106015583B (en) | 2016-07-28 | 2016-07-28 | A kind of symmetric form bayonet-type magnetic fluid seal device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090760B (en) * | 2021-04-07 | 2022-02-01 | 北京交通大学 | Magnetic liquid sealing device |
| CN113790270B (en) * | 2021-09-29 | 2022-04-26 | 北京交通大学 | Embedded sleeve type magnetic liquid sealing device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4304411A (en) * | 1980-04-17 | 1981-12-08 | Mechanical Technology Incorporated | Magnetic/centrifugal-fluid seal |
| JPH1089490A (en) * | 1996-09-12 | 1998-04-07 | Nok Corp | Sealing device utilized with magnetic fluid |
| JP2003314705A (en) * | 2002-04-25 | 2003-11-06 | Nok Corp | Sealing device utilizing magnetic fluid |
| CN100392294C (en) * | 2006-04-18 | 2008-06-04 | 北京交通大学 | Sealing anti-drip device of high temp magnetic liquid |
| CN100360839C (en) * | 2006-08-01 | 2008-01-09 | 中国兵器工业第五二研究所 | Magnetic liquid sealing device |
| JP5913374B2 (en) * | 2011-12-27 | 2016-04-27 | イーグル工業株式会社 | Rotary joint |
| CN102537367B (en) * | 2012-01-12 | 2014-12-03 | 北京理工大学 | Shaft sealing device with magnetic fluids |
| CN103574041B (en) * | 2013-11-08 | 2015-08-12 | 北京交通大学 | The magnetic liquid rotating sealing device of cooling bath and centrifugal combination |
| CN104948744A (en) * | 2015-07-06 | 2015-09-30 | 湖南维格磁流体股份有限公司 | Ultrahigh vacuum magnetic fluid seal transmission device |
| CN105351528B (en) * | 2015-11-06 | 2018-01-02 | 北京交通大学 | A kind of magnetic liquid magnetic sealing device suitable for high speed conditions |
| CN205824189U (en) * | 2016-07-28 | 2016-12-21 | 广西科技大学 | A kind of symmetric form bayonet-type magnetic fluid seal device |
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