CN108930795A - A kind of lenticular device for sealing magnetic fluid of mixed type - Google Patents
A kind of lenticular device for sealing magnetic fluid of mixed type Download PDFInfo
- Publication number
- CN108930795A CN108930795A CN201811017193.6A CN201811017193A CN108930795A CN 108930795 A CN108930795 A CN 108930795A CN 201811017193 A CN201811017193 A CN 201811017193A CN 108930795 A CN108930795 A CN 108930795A
- Authority
- CN
- China
- Prior art keywords
- ring
- periphery
- pole shoe
- magnet
- outer pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The present invention relates to a kind of lenticular device for sealing magnetic fluid of mixed type, including shell, it is made of more than one magnet fluid sealing unit, magnet fluid sealing unit includes outer pole shoe ring I, outer pole shoe ring II, outer pole shoe ring III, interior pole shoe ring, magnet ring I, magnet ring II, magnet ring III；The interior pole shoe ring includes that axial rings, radial direction ring I and radial ring II, the axial rings are set on axis, and the radial ring I is set to the middle part of axial rings periphery, and the radial ring II is set to the right end of axial rings periphery；The middle part of the inner headed face of the axial rings is equipped with groove II, is equipped with magnet ring I in groove II；The magnet ring II is set on the inner headed face of shell, between outer pole shoe ring I and outer pole shoe ring II, the periphery of the corresponding radial ring I of inner headed face, and there are gaps between the periphery of radial ring I.The present invention can solve the existing lower problem of sealing device pressure resistance performance.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, and in particular to a kind of lenticular device for sealing magnetic fluid of mixed type.
Background technique
When magnetic fluid seal technical application is in high-speed overload sealed environment, since the loss of magnetic fluid reduces sealing
The pressure-resistant performance of device leads to sealing device and fails because of the reduction of magnetic fluid, and it is close to improve wide arc gap magnetic fluid
The pressure-resistant performance of envelope is one of hot issue of current research.
That improves the method for wide arc gap magnetic Fluid Sealing pressure resistance performance improves magnetic fluid seal structure first is that passing through,
Sealing device as described in documents 1 (patent of Publication No. CN106321854A).Although sealing described in document above
The relatively common magnetic fluid seal performance of device is greatly improved, but the spies such as high-speed overload are still not achieved in its sealing performance
The high sealing performance requirement of different operating condition.
Summary of the invention
The object of the present invention is to provide a kind of lenticular device for sealing magnetic fluid of mixed type, to solve existing sealing device
The lower problem of existing pressure resistance performance, so that the sealing technique is successfully applied in the fields such as high-speed overload.
Technical scheme is as follows:
The lenticular device for sealing magnetic fluid of the mixed type, including shell (2)；
It is made of more than one magnet fluid sealing unit, the magnet fluid sealing unit includes outer pole shoe ring I, outer pole shoe ring
II, outer pole shoe ring III, interior pole shoe ring, magnet ring I, magnet ring II, magnet ring III；
The interior pole shoe ring includes axial rings, radial direction ring I and radial ring II, and the axial rings are set on axis, described
Radial ring I is set to the middle part of axial rings periphery, and the radial ring II is set to the right end of axial rings periphery；
The outer pole shoe ring I, outer pole shoe ring II, outer pole shoe ring III are set on the inner wall of shell, the outer pole shoe ring I
The left end setting of corresponding axial rings periphery, inner headed face are equipped with pole tooth I, the pole tooth I radially ring in the axial direction it is outer
Disc extends, and there are gap between the periphery of axial rings, filling magnetic fluid is sealed in the gap；The outer pole shoe
Ring II corresponds to the periphery setting being located between radial direction ring I and radial ring II in axial rings, and inner headed face is equipped with pole tooth II, institute
Radially the periphery of ring extends the pole tooth II stated in the axial direction, there are gap between the periphery of axial rings, fills out in the gap
The fluid that magnetizes is sealed；The periphery of the corresponding radial ring II of the outer pole shoe ring III is arranged, and sets on the radial ring II
Magnet ring III, the inner headed face of the outer pole shoe ring III and the outer circle of magnet ring III are equipped in fluted I, groove I
There are gap between face, filling magnetic fluid is sealed in the gap；The right side of the outer pole shoe ring II and outer pole shoe ring
The left side of III contacts with each other；
The middle part of the inner headed face of the axial rings is equipped with groove II, is equipped with magnet ring I in groove II；
The magnet ring II is set on the inner headed face of shell, between outer pole shoe ring I and outer pole shoe ring II, inner headed face
The periphery of corresponding radial direction ring I, and there are gaps between the periphery of radial ring I.
The periphery of the magnet ring III is flushed with the periphery of radial ring II.
The pole tooth I quantity is 1 ~ 10；The pole tooth II quantity is 1 ~ 10.
The size in gap is 0.05 ~ 3mm between the pole tooth I and axial rings periphery；The pole tooth II and axial direction
The size in gap is 0.05 ~ 3mm between ring periphery；The inner headed face of the outer pole shoe ring III and the outer circle of magnet ring III
The size in gap is 0.05 ~ 3mm between face.
The magnet ring I is axial charging type permanent magnet, and the magnet ring II is axial charging type permanent magnet,
The magnet ring III is radial magnetizing type permanent magnet.
The magnetic line of force of the magnet ring I and magnet ring II are contrary.
The lenticular device for sealing magnetic fluid of the mixed type further includes the first from left magnetism-isolating loop, the second from left magnetism-isolating loop, the right side one every magnetic
Ring, right two magnetism-isolating loops；The first from left magnetism-isolating loop is set on axis, positioned at the left side of axial rings；The second from left magnetism-isolating loop is set
In on the inner wall of shell, positioned at the left side of outer pole shoe ring I；One magnetism-isolating loop of the right side is set on axis, positioned at the right side of axial rings
Side；Two magnetism-isolating loop of the right side is set on the inner wall of shell, positioned at the right side of outer pole shoe ring III.
The lenticular device for sealing magnetic fluid of the mixed type, further includes left bearing and right bearing；The left bearing and
Right bearing is set on axis, and the left bearing is set to the left side of the first from left magnetism-isolating loop, the second from left magnetism-isolating loop, respectively with the first from left every
Magnet ring, the contact of the second from left magnetism-isolating loop；The right bearing is set to the right side of a right magnetism-isolating loop, right two magnetism-isolating loops, respectively with the right side one every
Magnet ring, right two magnetism-isolating loops contact.
The shell right end is equipped with end cap.
2-3 group is arranged in the magnet fluid sealing unit, along the axial arranging of axis.
The present invention designs the diameter in outer pole shoe ring I and outer pole shoe ring II by the design lenticular pole shoe of mixed type, by pole tooth
The loss of magnetic fluid is prevented on direction, and in interior pole shoe right end setting permanent magnet, in outer pole shoe ring I, outer pole shoe ring II, outer pole
Magnetic fluid is injected in the radial seal gap formed between boots ring I II and interior pole shoe, to realize the lenticular magnetic fluid of mixed type
Sealing device.
The present invention can overcome existing sealing device to cannot achieve the special operation conditions high sealing performance requirement such as high-speed overload
Problem is designed using lenticular structure, increases the magnetic flux in magnetic circuit, reduce the damage of the magnetic fluid in seal failure
It loses, improves the voltage endurance capability and sealing reliability of magnetic fluid seal under the conditions of wide arc gap, expand its range of safety operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the lenticular device for sealing magnetic fluid of mixed type provided in an embodiment of the present invention；
Each serial number mark and corresponding title are as follows in figure:
1- axis, 2- shell, pole shoe ring in the outer pole shoe ring III, 6- of the outer pole shoe ring II, 5- of 3- outer pole shoe ring I, 4-, 7- magnet ring
I, 8- magnet ring II, 9- magnet ring III, 10- pole tooth I, the pole 11- tooth II, 12- the first from left magnetism-isolating loop, 13- the second from left magnetism-isolating loop,
One magnetism-isolating loop of the right side 14-, two magnetism-isolating loops of the right side 15-, 16- left bearing, 17- right bearing, 18- end cap.
61- axial rings 41,62- radial direction ring I, 63- radial direction ring II.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, the lenticular device for sealing magnetic fluid of the mixed type, including shell 2；
It is made of more than one magnet fluid sealing unit, the magnet fluid sealing unit includes outer pole shoe ring I3, outer pole shoe
Ring II4, outer pole shoe ring III5, interior pole shoe ring 6, magnet ring I7, magnet ring II8, magnet ring III9；
The interior pole shoe ring 6 includes that axial rings 61, radial direction ring I62 and radial ring II63, the axial rings 41 are set in axis 1
On, the radial ring I62 is set to the middle part of 61 periphery of axial rings, and the radial ring II63 is set to 61 periphery of axial rings
Right end；
The outer pole shoe ring I3, outer pole shoe ring II4, outer pole shoe ring III5 are set on the inner wall of shell 2, the outer pole shoe
Ring I3 correspond to 61 periphery of axial rings left end setting, inner headed face be equipped with pole tooth I10, the pole tooth I10 radially to
The peripheries of axial rings 61 extends, and there are gap between the periphery of axial rings 61, filling magnetic fluid is carried out close in the gap
Envelope；The outer pole shoe ring II4 corresponds to the periphery setting being located between radial direction ring I62 and radial ring II63 in axial rings 61,
Its inner headed face is equipped with pole tooth II11, and radially the periphery of ring 61 extends the pole tooth II11 in the axial direction, with axial rings 61
Periphery between there are gap, filling magnetic fluid is sealed in the gap；The corresponding radial ring of the outer pole shoe ring III5
The periphery of II63 is arranged, and the radial ring II63 is equipped with groove I, and magnet ring III9 is equipped in groove I, described
There are gap between the inner headed face of outer pole shoe ring III5 and the periphery of magnet ring III9, filling magnetic fluid is carried out in the gap
Sealing；The right side of the outer pole shoe ring II4 and the left side of outer pole shoe ring III5 contact with each other；
The middle part of the inner headed face of the axial rings 61 is equipped with groove II, is equipped with magnet ring I7 in groove II；
The magnet ring II8 is set on the inner headed face of shell 2, between outer pole shoe ring I3 and outer pole shoe ring II4, in
The periphery of the corresponding radial ring I62 of disc, and there are gaps between the periphery of radial ring I62.
The periphery of the magnet ring III9 is flushed with the periphery of radial ring II63.
The pole tooth I10 quantity is 1 ~ 10；The pole tooth II11 quantity is 1 ~ 10.
The size in gap is 0.05 ~ 3mm between 61 periphery of pole tooth I10 and axial rings；The pole tooth II11
The size in gap is 0.05 ~ 3mm between 61 periphery of axial rings；The inner headed face and magnet ring of the outer pole shoe ring III5
The size in gap is 0.05 ~ 3mm between the periphery of III9.
The magnet ring I7 is axial charging type permanent magnet, and the magnet ring II8 is axial charging type permanent magnetism
Body, the magnet ring III9 are radial magnetizing type permanent magnet.
The magnetic line of force of the magnet ring I7 and magnet ring II8 are contrary.
The lenticular device for sealing magnetic fluid of the mixed type further includes the first from left magnetism-isolating loop 12, the second from left magnetism-isolating loop 13, the right side one
Magnetism-isolating loop 14, right two magnetism-isolating loops 15；The first from left magnetism-isolating loop 12 is set on axis 1, positioned at the left side of axial rings 61；Described
The second from left magnetism-isolating loop 13 is set on the inner wall of shell 2, positioned at the left side of outer pole shoe ring I3；One magnetism-isolating loop 14 of the right side is set in axis
On 1, positioned at the right side of axial rings 61；Two magnetism-isolating loop 15 of the right side is set on the inner wall of shell 2, positioned at outer pole shoe ring III5's
Right side.
The lenticular device for sealing magnetic fluid of the mixed type further includes left bearing 16 and right bearing 17；The left axle
Hold 16 and right bearing 17 be set on axis 1, the left bearing 16 is set to a left side for the first from left magnetism-isolating loop 12, the second from left magnetism-isolating loop 13
Side is contacted with the first from left magnetism-isolating loop 12, the second from left magnetism-isolating loop 13 respectively；The right bearing 17 be set to a right magnetism-isolating loop 14, the right side two every
The right side of magnet ring 15 is contacted with a right magnetism-isolating loop 14, right two magnetism-isolating loops 15 respectively.
2 right end of shell is equipped with end cap 18.
2-3 group is arranged in the magnet fluid sealing unit, along the axial arranging of axis 1.
Claims (9)
1. a kind of lenticular device for sealing magnetic fluid of mixed type, including shell (2), it is characterised in that:
Be made of more than one magnet fluid sealing unit, the magnet fluid sealing unit includes outer pole shoe ring I(3), outer pole
Boots ring II(4), outer pole shoe ring III(5), interior pole shoe ring (6), magnet ring I(7), magnet ring II(8), magnet ring III
(9)；
The interior pole shoe ring (6) includes axial rings (61), radial direction ring I(62) and radial direction ring II(63), the axial rings
(41) it is set on axis (1), the radial ring I(62) it is set to the middle part of axial rings (61) periphery, the radial ring II
(63) it is set to the right end of axial rings (61) periphery；
The outer pole shoe ring I(3), outer pole shoe ring II(4), outer pole shoe ring III(5) set on shell (2) inner wall on, it is described
Outer pole shoe ring I(3) corresponding axial rings (61) periphery left end setting, inner headed face is equipped with pole tooth I(10), the pole
Tooth I(10) radially the periphery of ring (61) extends in the axial direction, and there are gap, the gaps between the periphery of axial rings (61)
Middle filling magnetic fluid is sealed；The outer pole shoe ring II(4) it corresponds on axial rings (61) positioned at radial direction ring I(62) and radial direction
Ring II(63) between periphery setting, inner headed face be equipped with pole tooth II(11), the pole tooth II(11) radially to axis
Extend to the periphery of ring (61), there are gap between the periphery of axial rings (61), filling magnetic fluid is carried out in the gap
Sealing；The outer pole shoe ring III(5) corresponding radial direction ring II(63) periphery be arranged, the radial ring II(63) on set
In fluted I, groove I be equipped with magnet ring III(9), the outer pole shoe ring III(5) inner headed face and magnet ring III
(9) there are gap between periphery, filling magnetic fluid is sealed in the gap；The outer pole shoe ring II(4) right end
Face and the left side of outer pole shoe ring III(5) contact with each other；
The middle part of the inner headed face of the axial rings (61) is equipped with groove II, is equipped with magnet ring I(7 in groove II)；
The magnet ring II(8) it is set on the inner headed face of shell (2), it is located at outer pole shoe ring I(3) and outer pole shoe ring II(4)
Between, the corresponding radial direction ring I(62 of inner headed face) periphery, and there are gaps between the periphery of radial ring I(62).
2. the lenticular device for sealing magnetic fluid of mixed type as described in claim 1, it is characterised in that: the magnet ring
III(9 periphery) is flushed with the periphery of radial direction ring II(63).
3. the lenticular device for sealing magnetic fluid of mixed type as described in claim 1, it is characterised in that: the pole tooth I(10)
Quantity is 1 ~ 10；The pole tooth II(11) quantity be 1 ~ 10.
4. the lenticular device for sealing magnetic fluid of mixed type as described in claim 1, it is characterised in that: the pole tooth I(10 with
The size in gap is 0.05 ~ 3mm between axial rings (61) periphery；The pole tooth II(11) with axial rings (61) periphery it
Between gap size be 0.05 ~ 3mm；The outer pole shoe ring III(5) inner headed face and magnet ring III(9) periphery it
Between gap size be 0.05 ~ 3mm.
5. the lenticular device for sealing magnetic fluid of mixed type as described in claim 1, it is characterised in that: the magnet ring I
(7) it is axial charging type permanent magnet, the magnet ring II(8) it is axial charging type permanent magnet, the magnet ring III
It (9) is radial magnetizing type permanent magnet.
6. the lenticular device for sealing magnetic fluid of mixed type as described in claim 1, it is characterised in that: the magnet ring I
(7) and magnet ring II(8) the magnetic line of force it is contrary.
7. the lenticular device for sealing magnetic fluid of mixed type as described in claim 1, it is characterised in that: further include the first from left magnetism-isolating loop
(12), the second from left magnetism-isolating loop (13), a right magnetism-isolating loop (14), right two magnetism-isolating loops (15)；The first from left magnetism-isolating loop (12) is set in
On axis (1), it is located at the left side of axial rings (61)；The second from left magnetism-isolating loop (13) is set on the inner wall of shell (2), is located at outer pole
Boots ring I(3) left side；One magnetism-isolating loop of the right side (14) is set on axis (1), is located at the right side of axial rings (61)；Described
Right two magnetism-isolating loops (15) are set on the inner wall of shell (2), positioned at the right side of outer pole shoe ring III(5).
8. the lenticular device for sealing magnetic fluid of mixed type as claimed in claim 7, it is characterised in that: further include left bearing
(16) and right bearing (17)；The left bearing (16) and right bearing (17) is set on axis (1), the left bearing
(16) be set to the first from left magnetism-isolating loop (12), the second from left magnetism-isolating loop (13) left side, respectively with the first from left magnetism-isolating loop (12), the second from left magnetism-isolating loop
(13) it contacts；The right bearing (17) is set to the right side of a right magnetism-isolating loop (14), right two magnetism-isolating loops (15), respectively with the right side one every
Magnet ring (14), right two magnetism-isolating loops (15) contact.
9. the lenticular device for sealing magnetic fluid of mixed type as described in claim 1, it is characterised in that: the magnet fluid sealing
2-3 group is arranged in unit, along the axial arranging of axis (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017193.6A CN108930795B (en) | 2018-09-03 | 2018-09-03 | Mixed concave-convex magnetic fluid sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017193.6A CN108930795B (en) | 2018-09-03 | 2018-09-03 | Mixed concave-convex magnetic fluid sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108930795A true CN108930795A (en) | 2018-12-04 |
| CN108930795B CN108930795B (en) | 2023-05-05 |
Family
ID=64443403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811017193.6A Active CN108930795B (en) | 2018-09-03 | 2018-09-03 | Mixed concave-convex magnetic fluid sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108930795B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4628384A (en) * | 1983-08-26 | 1986-12-09 | Ferrofluidics Corporation | Bearing assembly with integrated ferrofluid seal |
| EP0297878A2 (en) * | 1987-06-29 | 1989-01-04 | Ferrofluidics Corporation | Compact Long-life magnetic fluid seal |
| JPH07305777A (en) * | 1994-05-11 | 1995-11-21 | Nippon Ferrofluidics Kk | Conductive magnetic fluid seal device |
| CN103234049A (en) * | 2013-04-12 | 2013-08-07 | 北京交通大学 | Method for improving sealing reliability and prolonging service life of split magnetic liquid sealing device |
| CN106090238A (en) * | 2016-08-15 | 2016-11-09 | 广西科技大学 | A kind of staggered device for sealing magnetic fluid of split-type |
| CN106321854A (en) * | 2016-10-21 | 2017-01-11 | 北京交通大学 | Magnetic liquid sealing device with radial isodirectional magnetization of permanent magnets |
| CN207213180U (en) * | 2017-08-21 | 2018-04-10 | 埃慕迪磁电科技(上海)有限公司 | A kind of zigzag tooth end-surface type magnetic fluid seal device |
-
2018
- 2018-09-03 CN CN201811017193.6A patent/CN108930795B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4628384A (en) * | 1983-08-26 | 1986-12-09 | Ferrofluidics Corporation | Bearing assembly with integrated ferrofluid seal |
| EP0297878A2 (en) * | 1987-06-29 | 1989-01-04 | Ferrofluidics Corporation | Compact Long-life magnetic fluid seal |
| JPH07305777A (en) * | 1994-05-11 | 1995-11-21 | Nippon Ferrofluidics Kk | Conductive magnetic fluid seal device |
| CN103234049A (en) * | 2013-04-12 | 2013-08-07 | 北京交通大学 | Method for improving sealing reliability and prolonging service life of split magnetic liquid sealing device |
| CN106090238A (en) * | 2016-08-15 | 2016-11-09 | 广西科技大学 | A kind of staggered device for sealing magnetic fluid of split-type |
| CN106321854A (en) * | 2016-10-21 | 2017-01-11 | 北京交通大学 | Magnetic liquid sealing device with radial isodirectional magnetization of permanent magnets |
| CN207213180U (en) * | 2017-08-21 | 2018-04-10 | 埃慕迪磁电科技(上海)有限公司 | A kind of zigzag tooth end-surface type magnetic fluid seal device |
Non-Patent Citations (1)
| Title |
|---|
| 孙贤备;杨文焕;: "考虑邻齿效应的直线旋转步进电动机推力计算", 微特电机 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108930795B (en) | 2023-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107956883A (en) | A kind of radial direction socket type labyrinth type device for sealing magnetic fluid | |
| CN108006233A (en) | A kind of telescopic device for sealing magnetic fluid of trapezoidal pole shoe | |
| CN105570466B (en) | A kind of symmetric form staged magnetic fluid seal device | |
| CN207634700U (en) | A kind of radial direction socket type labyrinth type device for sealing magnetic fluid | |
| CN107882999B (en) | Magnetic source embedded magnetic fluid sealing device | |
| CN108006230B (en) | Mixed type magnetic fluid sealing device | |
| CN107725785A (en) | A kind of new staged device for sealing magnetic fluid | |
| CN109282041A (en) | A kind of more magnetic hybrid type device for sealing magnetic fluid | |
| CN102252095A (en) | Seal method of magnetorheological fluid for elevator magnetorheological fluid brake and seal device | |
| CN211423388U (en) | Series-parallel sleeve type magnetic fluid sealing device | |
| CN103807329A (en) | Eddy current retarder device based on magnetorheological effect | |
| CN107893856A (en) | A kind of telescopic device for sealing magnetic fluid of mixed type | |
| CN109268507A (en) | A kind of more ring-like device for sealing magnetic fluid of magnetic source magnetic conduction | |
| CN110906009A (en) | Series-parallel sleeve type magnetic fluid sealing device | |
| CN109027251A (en) | A kind of plagiodont device for sealing magnetic fluid | |
| CN208793627U (en) | A kind of lenticular device for sealing magnetic fluid of mixed type | |
| CN208793628U (en) | A kind of magnetic source alternating expression socket type device for sealing magnetic fluid | |
| CN108930795A (en) | A kind of lenticular device for sealing magnetic fluid of mixed type | |
| CN207569209U (en) | A kind of novel staged device for sealing magnetic fluid | |
| CN109027254A (en) | A kind of embedded tandem type multi-diameter shaft device for sealing magnetic fluid of magnetic source | |
| CN211423389U (en) | Double-magnetic-source labyrinth type magnetic fluid sealing device | |
| CN106969149B (en) | Magnetic liquid end face labyrinth gland | |
| CN209762249U (en) | Embedded labyrinth type magnetic fluid sealing device | |
| CN107740866A (en) | A kind of staged device for sealing magnetic fluid | |
| CN108061163B (en) | A kind of staged device for sealing magnetic fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |