CN106151527B - A kind of magnetic source tandem type staged device for sealing magnetic fluid - Google Patents
A kind of magnetic source tandem type staged device for sealing magnetic fluid Download PDFInfo
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- CN106151527B CN106151527B CN201610666205.2A CN201610666205A CN106151527B CN 106151527 B CN106151527 B CN 106151527B CN 201610666205 A CN201610666205 A CN 201610666205A CN 106151527 B CN106151527 B CN 106151527B
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- China
- Prior art keywords
- pole shoe
- ring
- shoe ring
- magnetism
- isolating loop
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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
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- 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 mechanical engineering technical field of sealing technology, refer specifically to a kind of magnetic source tandem type staged device for sealing magnetic fluid, the device includes the permanent magnet being installed in staged on axle, the first pole shoe ring is installed in the left side of the permanent magnet positioned at the leftmost side, the second pole shoe ring is installed positioned at the right side of the permanent magnet of the rightmost side, in permanent magnet, first pole shoe ring, the outside of second pole shoe ring is installed by outer pole shoe ring, the inboard of outer pole shoe ring sets ladder corresponding with permanent magnet, realize the staged sealing structure of more magnetic source tandem types, the structure can increase the intensity of magnetic field force, magnet fluid sealing voltage endurance capability is low under the conditions of solving the problems, such as wide arc gap.
Description
Technical field
The invention belongs to mechanical engineering technical field of sealing technology, refers specifically to a kind of high magnetic source tandem type staged of voltage endurance capability
Device for sealing magnetic fluid.
Background technology
Magneticfluid Seal Technique have compared to conventional seal techniques the slip that instrument can not measure, without solid friction,
The advantages that long lifespan, high reliability, all trades and professions have been widely used in it.But magnet fluid sealing is quick to seal clearance change
Sense, it seals voltage endurance capability and significantly reduced with the increase of seal clearance, therefore how to improve magnetic fluid under the conditions of wide arc gap
The voltage endurance capability of sealing, turning into magnet fluid sealing so as to strengthening the reliability of magnet fluid sealing performance under the conditions of wide arc gap needs to solve
Certainly the problem of.The magnetic source of existing device for sealing magnetic fluid is less, therefore not strong enough to magnetic field force caused by magnetic fluid, causes magnetic
The voltage endurance capability of fluid seal apparatus is relatively low；Further, since the sealing structure of through type, magnetic current bulk diffusion when causing seal failure
Amount is big, and sealing device self-reparing capability is poor.
The content of the invention
Present invention seek to address that the defects of prior art, there is provided a kind of magnetic source tandem type staged device for sealing magnetic fluid,
The sealing device can solve the problem that effective wide arc gap condition lower sealing device voltage endurance capability is told somebody what one's real intentions are.
Technical scheme is as follows：A kind of magnetic source tandem type staged device for sealing magnetic fluid, including axle, shell,
First pole shoe ring, outer pole shoe ring, permanent magnet, the second pole shoe ring, described outer pole shoe ring are set on the inwall of shell, outer pole shoe
The inner headed face of ring is arranged to hierarchic structure；
Described the first pole shoe ring and the second pole shoe ring is set with axle, and the first pole shoe ring is located at the second pole shoe ring left side
Side；The cascaded surface of the leftmost side on the corresponding outer pole shoe ring inner headed face of the periphery of the first described pole shoe ring, between being provided between them
Gap；The cascaded surface of the rightmost side on the corresponding outer pole shoe ring inner headed face of the periphery of the second described pole shoe ring, between being provided between them
Gap；
Described permanent magnet is located between the first pole shoe ring and the second pole shoe ring, with the first pole shoe ring and the second pole shoe ring phase
Contact；Permanent magnet is made up of more than two magnet rings, and each magnet ring is sleeved on axle, outside each magnet ring
Footpath is unequal, is connected by the ascending order of external diameter in the axial direction of axle；Each magnet ring is connected outside the staged to be formed
Disc and the inner headed face of outer pole shoe ring are mutually corresponding, and gap is left between the staged periphery and the inner headed face of outer pole shoe ring.
Each magnet ring of described permanent magnet is axial charging type permanent magnet, and the magnetic line of force of each magnet ring
Direction is identical.
The quantity of described permanent magnet magnet ring is 2-6.
Also include left magnetism-isolating loop, right magnetism-isolating loop, bearing, left magnetism-isolating loop and axle are installed successively in the left side of the first pole shoe ring
Hold, right magnetism-isolating loop and bearing are installed successively on the right side of the second pole shoe ring.
Described left magnetism-isolating loop includes left inside magnetism-isolating loop and left outside magnetism-isolating loop, and left outside magnetism-isolating loop is installed on a left side for outer pole shoe ring
End, left inside magnetism-isolating loop are installed on the axle on the left of the first pole shoe ring, the left end pair of the left end of left inside magnetism-isolating loop and left outside magnetism-isolating loop
Together, the external diameter of left inside magnetism-isolating loop is less than the internal diameter of left outside magnetism-isolating loop；Described right magnetism-isolating loop include in the right side magnetism-isolating loop and it is right outer every
Magnet ring, right outer magnetism-isolating loop are installed on the right-hand member of outer pole shoe ring, and magnetism-isolating loop is installed on the axle of the second pole shoe ring right-hand member in the right side, in the right side
The right alignment of magnetism-isolating loop and right outer magnetism-isolating loop, the external diameter of magnetism-isolating loop is less than the internal diameter of the outer magnetism-isolating loop in the right side in the right side.
The external diameter of described left inside magnetism-isolating loop is more than the cascaded surface of the outer pole shoe ring leftmost side relative to the radial height of axle.
Each ladder height is equal on described outer pole shoe ring tread；The radial height difference of two adjacent permanent magnets ring is outer
Twice of each ladder height on pole shoe ring cascaded surface.
Gap between the periphery of each magnet ring of permanent magnet and corresponding outer pole shoe ring cascaded surface is
0.1mm-5mm。
The first described pole shoe ring is consistent with the radial height of the magnet ring of the leftmost side, the first pole shoe ring and the leftmost side
The periphery of magnet ring corresponds to the cascaded surface of the leftmost side on the inner headed face of outer pole shoe ring jointly, and is left between the cascaded surface
Gap.
The installation process of sealing device of the present invention is as follows：Permanent magnet is arranged on to the middle part of axle, composition from right side
The magnet ring of permanent magnet is from left to right increased stepped successively by external diameter；In the right side installation second of the permanent magnet of the rightmost side
Pole shoe ring, the first pole shoe ring is installed in the left side of the permanent magnet of the leftmost side；In permanent magnet, the first pole shoe ring, second pole shoe ring
Outer pole shoe ring is installed in outside, the right side of outer pole shoe ring is alignd with the right side of the second pole shoe ring, in the outer pole shoe ring leftmost side
Cascaded surface and the first pole shoe ring periphery gap in inject magnetic fluid, the cascaded surface and second in the outer pole shoe ring rightmost side
Magnetic fluid is injected in the gap of pole shoe ring periphery；Left outside magnetism-isolating loop is installed in the left side of outer pole shoe ring, in the first pole shoe ring
Left side left inside magnetism-isolating loop is installed, the right outer magnetism-isolating loop of installation on the right side of outer pole shoe ring, on the right side of the second pole shoe ring installation right side
Interior magnetism-isolating loop；Bearing is installed on the axle on the left of left magnetism-isolating loop, bearing is installed on the axle on the right side of right magnetism-isolating loop；Installed on axle
Shell, jacket live in the seal member stated, and the inwall of shell left end is close to bearing positioned at left side, the right-hand member of shell and end
Lid is connected through a screw thread, and end cap compresses the outer ring of the bearing positioned at right side.
Sealing device of the present invention sets the multiple axial charging type permanent magnets of magnetic line of force direction identical on axle, forever
The stepped distribution of magnet, the ladder corresponding with permanent magnet is set on the pole shoe on the outside of permanent magnet, forms magnetic source tandem type
Staged magnetic fluid sealing structure, multiple magnetic sources of the magnetic fluid sealing structure, which are set, adds magnetic field intensity, so that magnetic current
The voltage endurance capability of body sealing greatly enhances；The loss of magnetic fluid, is enhanced when stepped sealing structure can reduce seal failure
The secondary bearing capacity and self-reparing capability of sealing device.
Brief description of the drawings
Fig. 1 is schematic diagram of sealing device of the present invention
Each sequence number sign and its corresponding structure title are as follows in figure：1- axles, 2- shells, 3- bearings, the pole shoe rings of 4- first,
The left outside magnetism-isolating loops of 5-, the outer pole shoe rings of 6-, 7- permanent magnets, the pole shoe rings of 8- second, the right outer magnetism-isolating loops of 9-, magnetism-isolating loop in the 10- right sides, 11-
End cap, the left inside magnetism-isolating loops of 12-.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Magnetic source tandem type staged device for sealing magnetic fluid as shown in Figure 1, including axle 1, shell 2, the first pole shoe ring 4,
Outer pole shoe ring 6, permanent magnet 7, the second pole shoe ring 8,
Described outer pole shoe ring 6 is set on the inwall of shell 2, and the inner headed face of outer pole shoe ring 6 is arranged to hierarchic structure；
Described the first pole shoe ring 4 and the second pole shoe ring 8 is set with axle 1, and the first pole shoe ring 4 is located at the second pole shoe
The left side of ring 8；The cascaded surface of the leftmost side on the corresponding outer inner headed face of pole shoe ring 6 of the periphery of the first described pole shoe ring 4, between them
Provided with gap；The cascaded surface of the rightmost side on the corresponding outer inner headed face of pole shoe ring 6 of the periphery of the second described pole shoe ring 8, they it
Between be provided with gap；
Described permanent magnet 7 is located between the first pole shoe ring 4 and the second pole shoe ring 8, with the first pole shoe ring 4 and the second pole shoe
Ring 8 is in contact；Permanent magnet 7 is made up of more than two magnet rings, and each magnet ring is sleeved on axle 1, each permanent magnetism
The external diameter of body ring is unequal, is connected by the ascending order of external diameter in the axial direction of axle 1；Each magnet ring connects what is formed
Staged periphery and the inner headed face of outer pole shoe ring 6 are mutually corresponding, between the staged periphery and the inner headed face of outer pole shoe ring 6
Leave gap.
Each magnet ring of described permanent magnet 7 is axial charging type permanent magnet, and the magnetic force of each magnet ring
Line direction is identical.
The quantity of the described magnet ring of permanent magnet 7 is 2-6.
Also include left magnetism-isolating loop, right magnetism-isolating loop, bearing 3, left magnetism-isolating loop and axle are installed successively in the left side of the first pole shoe ring 4
3 are held, right magnetism-isolating loop and bearing 3 are installed successively on the right side of the second pole shoe ring 8.
Described left magnetism-isolating loop includes left inside magnetism-isolating loop 12 and left outside magnetism-isolating loop 5, and left outside magnetism-isolating loop 5 is installed on outer pole shoe ring
6 left end, left inside magnetism-isolating loop 12 are installed on the axle 1 in the left side of the first pole shoe ring 4, the left end of left inside magnetism-isolating loop 12 and left outside every magnetic
The left alignment of ring 5, the external diameter of left inside magnetism-isolating loop 12 are less than the internal diameter of left outside magnetism-isolating loop 5；Described right magnetism-isolating loop is included in the right side
Magnetism-isolating loop 10 and right outer magnetism-isolating loop 9, right outer magnetism-isolating loop 9 are installed on the right-hand member of outer pole shoe ring 6, and magnetism-isolating loop 10 is installed on second in the right side
On the axle 1 of the right-hand member of pole shoe ring 8, the right alignment of magnetism-isolating loop 10 and right outer magnetism-isolating loop 9 in the right side, it is right in the external diameter of magnetism-isolating loop 10 be less than
The internal diameter of right outer magnetism-isolating loop 9.
The cascaded surface that the external diameter of described left inside magnetism-isolating loop 12 is more than the outer leftmost side of pole shoe ring 6 is high relative to the radial direction of axle 1
Degree.
Each ladder height is equal on the described cascaded surface of outer pole shoe ring 6；The radial height of two adjacent permanent magnets ring is poor
It is twice of each ladder height on the outer cascaded surface of pole shoe ring 6.
Gap between the periphery of 7 each magnet ring of permanent magnet and the corresponding cascaded surface of outer pole shoe ring 6 is
0.1mm-5mm。
The first described pole shoe ring 4 is consistent with the radial height of the magnet ring of the leftmost side, the first pole shoe ring 4 and the leftmost side
Magnet ring periphery jointly on the inner headed face of corresponding outer pole shoe ring 6 leftmost side cascaded surface, and between the cascaded surface
Leave gap.
The installation process of sealing device of the present invention is as follows：Permanent magnet 7 is arranged on to the middle part of axle 1, group from right side
Into permanent magnet 7 magnet ring from left to right increase successively by external diameter it is stepped；In the right side peace of the magnet ring of the rightmost side
The second pole shoe ring 8 is filled, the first pole shoe ring 4 is installed in the left side of the magnet ring of the leftmost side；Permanent magnet 7, the first pole shoe ring 4,
Outer pole shoe ring 6 is installed in the outside of second pole shoe ring 8, the left side of outer pole shoe ring 6 is alignd with the left side of the first pole shoe ring 4,
Alignd with the right side of the second pole shoe ring 8 right side of outer pole shoe ring 6；Cascaded surface and the first pole in the outer leftmost side of pole shoe ring 6
Magnetic fluid, cascaded surface and the periphery of the second pole shoe ring 8 in the outer rightmost side of pole shoe ring 6 are injected in the gap of the periphery of boots ring 4
Gap in inject magnetic fluid；Left outside magnetism-isolating loop 5 is installed in the left side of outer pole shoe ring 6, installed in the left side of the first pole shoe ring 4
Left inside magnetism-isolating loop 12, the right outer magnetism-isolating loop 9 of installation on the right side of outer pole shoe ring 6, every magnetic in the installation of the right side of the second pole shoe ring 8 is right
Ring 10；Bearing 3 is installed on the axle 1 on the left of left magnetism-isolating loop, bearing 3 is installed on the axle 1 on the right side of right magnetism-isolating loop；Pacify on axle 1
Casing 2, shell 2 cover above-mentioned seal member, the inwall of the left end of shell 2 is close to bearing 3 positioned at left side, shell 2
Right-hand member is connected through a screw thread with end cap 11, and end cap 11 compresses the outer ring of the bearing 3 positioned at right side.
Claims (9)
1. a kind of magnetic source tandem type staged device for sealing magnetic fluid, including axle（1）, shell（2）, the first pole shoe ring（4）, outer pole
Boots ring（6）, permanent magnet（7）, the second pole shoe ring（8）, it is characterised in that：
Described outer pole shoe ring（6）It is set in shell（2）Inwall on, outer pole shoe ring（6）Inner headed face be arranged to hierarchic structure；
The first described pole shoe ring（4）With the second pole shoe ring（8）It is set with axle（1）On, the first pole shoe ring（4）Positioned at second
Pole shoe ring（8）Left side；The first described pole shoe ring（4）The corresponding outer pole shoe ring of periphery（6）The ladder of the leftmost side on inner headed face
Face, gap is provided between them；The second described pole shoe ring（8）The corresponding outer pole shoe ring of periphery（6）The rightmost side on inner headed face
Cascaded surface, be provided with gap between them；
Described permanent magnet（7）Located at the first pole shoe ring（4）With the second pole shoe ring（8）Between, with the first pole shoe ring（4）With second
Pole shoe ring（8）It is in contact；Permanent magnet（7）It is made up of more than two magnet rings, each magnet ring is sleeved on axle（1）
On, the external diameter of each magnet ring is unequal, by the ascending order of external diameter in axle（1）Axial direction on connect；Each permanent magnetism
Body ring is connected the staged periphery to be formed and outer pole shoe ring（6）Inner headed face it is mutually corresponding, the staged periphery and outer pole
Boots ring（6）Inner headed face between leave gap.
2. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：Described permanent magnet
（7）Each magnet ring be axial charging type permanent magnet, and the magnetic line of force direction of each magnet ring is identical.
3. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 1 or 2, it is characterised in that：It is described forever
Magnet（7）The quantity of magnet ring be 2-6.
4. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：Also include a left side every magnetic
Ring, right magnetism-isolating loop, bearing（3）, in the first pole shoe ring（4）Left side left magnetism-isolating loop and bearing are installed successively（3）, in the second pole shoe
Ring（8）Right side right magnetism-isolating loop and bearing are installed successively（3）.
5. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 4, it is characterised in that：A described left side is every magnetic
Ring includes left inside magnetism-isolating loop（12）With left outside magnetism-isolating loop（5）, left outside magnetism-isolating loop（5）It is installed on outer pole shoe ring（6）Left end, it is left inside
Magnetism-isolating loop（12）It is installed on the first pole shoe ring（4）The axle in left side（1）On, left inside magnetism-isolating loop（12）Left end and left outside magnetism-isolating loop
（5）Left alignment, left inside magnetism-isolating loop（12）External diameter be less than left outside magnetism-isolating loop（5）Internal diameter；Described right magnetism-isolating loop includes
Magnetism-isolating loop in the right side（10）With magnetism-isolating loop outside the right side（9）, right outer magnetism-isolating loop（9）It is installed on outer pole shoe ring（6）Right-hand member, the right side in magnetism-isolating loop
（10）It is installed on the second pole shoe ring（8）The axle of right-hand member（1）On, magnetism-isolating loop in the right side（10）With magnetism-isolating loop outside the right side（9）Right alignment,
Magnetism-isolating loop in the right side（10）External diameter be less than right outer magnetism-isolating loop（9）Internal diameter.
6. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 5, it is characterised in that：It is described it is left inside every
Magnet ring（12）External diameter be more than outer pole shoe ring（6）The cascaded surface of the leftmost side is relative to axle（1）Radial height.
7. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：Described outer pole shoe
Ring（6）Each ladder height is equal on cascaded surface；The radial height difference of two adjacent permanent magnets ring is outer pole shoe ring（6）Cascaded surface
Twice of upper each ladder height.
8. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：Permanent magnet（7）Often
The periphery of individual magnet ring and corresponding outer pole shoe ring（6）Gap between cascaded surface is 0.1mm-5mm.
9. magnetic source tandem type staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：The first described pole
Boots ring（4）It is consistent with the radial height of the magnet ring of the leftmost side, the first pole shoe ring（4）It is cylindrical with the magnet ring of the leftmost side
Face corresponds to outer pole shoe ring jointly（6）Inner headed face on the leftmost side cascaded surface, and leave gap between the cascaded surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610666205.2A CN106151527B (en) | 2016-08-15 | 2016-08-15 | A kind of magnetic source tandem type staged device for sealing magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610666205.2A CN106151527B (en) | 2016-08-15 | 2016-08-15 | A kind of magnetic source tandem type staged device for sealing magnetic fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106151527A CN106151527A (en) | 2016-11-23 |
| CN106151527B true CN106151527B (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610666205.2A Active CN106151527B (en) | 2016-08-15 | 2016-08-15 | A kind of magnetic source tandem type staged device for sealing magnetic fluid |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061163B (en) * | 2017-12-13 | 2019-06-25 | 广西科技大学 | A kind of staged device for sealing magnetic fluid |
| CN107842613B (en) | 2017-12-13 | 2019-04-02 | 广西科技大学 | A kind of arc step formula device for sealing magnetic fluid |
| CN107816553B (en) * | 2017-12-13 | 2019-06-28 | 广西科技大学 | A kind of ladder shaft type device for sealing magnetic fluid |
| CN112728108B (en) * | 2021-01-12 | 2022-02-01 | 清华大学 | Magnetic field adjustable magnetic liquid sealing device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4486026A (en) * | 1982-02-10 | 1984-12-04 | Nippon Seiko K.K. | Sealing and bearing means by use of ferrofluid |
| WO2000073837A1 (en) * | 1999-05-28 | 2000-12-07 | Nok Corporation | Light shielding structure |
| EP1312964A4 (en) * | 2000-06-21 | 2009-12-30 | Nok Corp | Magnetic fluid sealer and method for mounting magnetic fluid sealer |
| JP2002005308A (en) * | 2000-06-22 | 2002-01-09 | Nok Corp | Attachment method of magnetic fluid seal |
| PL221563B1 (en) * | 2011-12-08 | 2016-04-29 | Akademia Górniczo Hutnicza Im Stanisława Staszica W Krakowie | Multistage sealing using a magnetic fluid |
| CN103115152B (en) * | 2013-01-30 | 2015-05-06 | 北京交通大学 | Magnetic fluid and maze alternated type combined sealing |
| CN105570468A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical magnetic fluid sealing device |
| CN105570466B (en) * | 2016-03-02 | 2017-11-21 | 广西科技大学 | A kind of symmetric form staged magnetic fluid seal device |
| CN105570465B (en) * | 2016-03-02 | 2018-11-27 | 广西科技大学 | A kind of labyrinth type magnetic fluid seal device |
| CN205877200U (en) * | 2016-08-15 | 2017-01-11 | 广西科技大学 | Cascaded device for sealing magnetic fluid of magnetic source tandem type |
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2016
- 2016-08-15 CN CN201610666205.2A patent/CN106151527B/en active Active
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