CN108980358A - A kind of ladder pole flute profile magnetic fluid sealing structure - Google Patents
A kind of ladder pole flute profile magnetic fluid sealing structure Download PDFInfo
- Publication number
- CN108980358A CN108980358A CN201810914065.5A CN201810914065A CN108980358A CN 108980358 A CN108980358 A CN 108980358A CN 201810914065 A CN201810914065 A CN 201810914065A CN 108980358 A CN108980358 A CN 108980358A
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- CN
- China
- Prior art keywords
- pole
- magnetic
- tooth
- magnetic fluid
- shell
- 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.)
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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 discloses a kind of ladder pole flute profile magnetic fluid sealing structures, it is axially spaced in space between reciprocal axis outer surface and inner walls to be equipped with multiple cyclic annular pole shoes, axial charging type permanent-magnetic clamp is folded between two neighboring pole shoe, the polarity of the magnetic pole of adjacent axial charging type permanent-magnetic clamp is opposite, the first pole tooth is equipped at the periphery of reciprocal axis and corresponding pole shoe position, there are gap between first pole tooth and the inner headed face of pole shoe, gap location is marked with magnetic fluid；First pole number of teeth amount corresponding to each pole shoe has multiple, and the outer diameter of all first poles tooth corresponding to the same pole shoe is identical；From high-pressure side to low pressure side direction, the outer diameter of the first pole tooth corresponding to different pole shoes is successively increased.First pole tooth is designed to the structure with certain gradient distribution by the present invention, it is possible to prevente effectively from when seal failure magnetic fluid loss, ensure that the pressure-resistant performance of sealing.
Description
Technical field
The invention belongs to mechanical engineering sealing techniques, and in particular to a kind of ladder pole flute profile magnetic fluid sealing structure.
Background technique
The magnetic fluid sealing structure for being currently used for reciprocal axis generally comprises the shell with hollow cavity, reciprocal axis, reciprocal axis and
Permanent magnet is set between shell and pole shoe carries out magnet fluid sealing, pole shoe inner ring is equipped with pole tooth.
Improve magnetic fluid seal pressure resistance performance method first is that by increase magnet fluid sealing magnetic circuit in magnetic source number
The shape for measuring and improving pole shoe, the sealing device as described in the patent of Publication No. CN204805552U and CN202418592U.
Although the relatively common magnetic fluid seal performance of two kinds of sealing devices described in document above is greatly improved, existing skill
Art still has following defect:
The leakage of magnetic fluid leads to the reduction of magnetic field strength in magnetic circuit in magnet fluid sealing, to make the resistance to pressure of magnet fluid sealing
It can reduce.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of can reduce the strong rank of magnetic current bulk diffusion, sealing voltage endurance capability
Terraced pole flute profile magnetic fluid sealing structure.
The technical solution that the present invention solves the problems, such as is: a kind of ladder pole flute profile magnetic fluid sealing structure, including hollow shell
Body, the shell is closed at one end, the other end opens wide, and is provided with through-hole at the closed end center of shell, further includes wearing from through-hole
It is axially spaced in the space between reciprocal axis outer surface and inner walls to be equipped with multiple ring-types to the reciprocal axis of housing cavity
Pole shoe is folded with axial charging type permanent-magnetic clamp, the polarity of the magnetic pole of adjacent axial charging type permanent-magnetic clamp between two neighboring pole shoe
On the contrary, be equipped with the first pole tooth at the periphery of reciprocal axis and corresponding pole shoe position, the inner headed face of the first pole tooth and pole shoe it
Between there are gap, gap location is marked with magnetic fluid；
First pole number of teeth amount corresponding to each pole shoe has multiple, the outer diameter of all first poles tooth corresponding to the same pole shoe
It is identical；
From high-pressure side to low pressure side direction, the outer diameter of the first pole tooth corresponding to different pole shoes is successively increased.
In above scheme, the first pole tooth is designed to the structure with certain gradient distribution, once magnetic fluid is lost, only meeting
It flows in the pole tooth of next stage more high gradient, so that further loss is blocked, it is possible to prevente effectively from magnetic fluid when seal failure
Loss, ensure that the pressure-resistant performance of sealing.
The quantity of the pole shoe is preferably 2~20.
Further, the second pole tooth is equipped on the inner headed face near two pole shoes at housings close end and open end,
And the first pole tooth is not provided at the periphery of reciprocal axis corresponding to the two pole shoes, between the second pole tooth and reciprocal axis periphery
There are gap, gap location is marked with magnetic fluid.The quantity of the pole shoe is 4~20.
For two pole shoes near housings close end and open end, pole tooth is opened on pole shoe on either axis,
But it is opened on pole shoe and more preferably processes.
Further, it is provided with groove on the side end face near two pole shoes at housings close end and open end, it is recessed
Radial magnetizing type permanent-magnetic clamp, and the magnetic direction of radial magnetizing type permanent-magnetic clamp and the magnetic loop direction phase where it are provided in slot
Together.
In above-mentioned further improved scheme, radial magnetizing type permanent-magnetic clamp, which is set to, to be conducive to further enhance in magnetic loop
Magnetic field strength improves sealing voltage endurance capability.
Further, the relative movement distance between each pole shoe and the first pole tooth corresponding to it is no more than the pole shoe
Total span of the first corresponding pole tooth.
Total span refers in all first poles tooth corresponding to the pole shoe, between two first pole teeth at both ends away from
From.
Since reciprocal axis does reciprocating linear motion, then pole shoe will be mobile relative to the first pole tooth, but cannot
More than the span of the first pole tooth corresponding to it, otherwise can occur with the first pole tooth not with respect to or with the pole tooth of next step it is dry
The case where relating to.
Preferably, the first pole tooth equidistantly distributed.
Further, be socketed with hollow magnetic shield on the inner wall of the housing, all pole shoes and axial charging type permanent-magnetic clamp it is outer
Disc is abutted with magnetic shield inner wall.The use of magnetic shield can shorten the path length of magnetic loop, and the magnetic field increased in gap is strong
Degree.
Further, housing cavity is sealed in by end cap compression near the pole shoe of shell open end.
Remarkable result of the invention is:
1. the first pole tooth is designed to the structure with certain gradient distribution, once magnetic fluid is lost, next stage only can be flowed to more
In the pole tooth of high gradient, to be blocked further loss, it is possible to prevente effectively from when seal failure magnetic fluid loss, ensure that
Seal pressure-resistant performance.
2. adding radial magnetizing type permanent-magnetic clamp, be conducive to further enhance magnetic field strength, improve sealing voltage endurance capability.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is magnetic fluid sealing structure schematic diagram of the present invention.
In figure: the reciprocal axis of 1-, 2- shell, 3- pole shoe, 4- end cap, 5- magnetic shield, the first pole 6- tooth, 7- axial charging type
Permanent-magnetic clamp, 8- radial magnetizing type permanent-magnetic clamp, the second pole 10- tooth.
Specific embodiment
As shown in Figure 1, a kind of ladder pole flute profile magnetic fluid sealing structure, including hollow shell 2, described 2 one end of shell
Closing, the other end open wide.Through-hole is provided at the closed end center of shell 2.Further include worn from through-hole it is past to 2 inner cavity of shell
Multiple axis 1.
It is axially spaced in space between reciprocal 1 outer surface of axis and 2 inner wall of shell to be equipped with multiple cyclic annular pole shoes 3.Phase
Axial charging type permanent-magnetic clamp 7 is folded between adjacent two pole shoes 3.The polarity of the magnetic pole of adjacent axial charging type permanent-magnetic clamp 7 is opposite.
Hollow magnetic shield 5 is socketed in 2 inner wall of shell.The periphery of all pole shoes 3 and axial charging type permanent-magnetic clamp 7 and magnetic shield 2
Inner wall abuts.Pole shoe 3 near 2 open end of shell is sealed in 2 inner cavity of shell by the compression of end cap 4.
The second pole tooth 10 is being equipped on the inner headed face of 2 closed end of shell and two pole shoes 3 of open end.Second pole
There are gaps between 1 periphery of tooth 10 and reciprocal axis.Gap size between second pole tooth 10 and reciprocal 1 outer surface of axis is 0.05
~3mm.Gap location is marked with magnetic fluid.
The periphery of circular reciprocal axis 1 and corresponding other pole shoe 3(remove two near 2 closed end of shell and open end
Other pole shoes 3 except pole shoe 3) the first pole tooth 6 is equipped at position.Between existing between first pole tooth 6 and the inner headed face of pole shoe 3
Gap.Gap size between 3 inner headed face of first pole tooth 6 and pole shoe is 0.05~3mm.Gap location is marked with magnetic fluid.
First pole tooth, 6 quantity corresponding to each pole shoe 3 has multiple.All first poles corresponding to the same pole shoe 3
The outer diameter of tooth 6 is identical.
First pole tooth, 6 equidistantly distributed.
From high-pressure side to low pressure side direction, the outer diameter of the first pole tooth 6 corresponding to different pole shoes 3 is successively increased.Each
Relative movement distance between pole shoe 3 and the first pole tooth 6 corresponding to it is no more than the first pole tooth 6 corresponding to the pole shoe 3
Total span.
Groove is being provided on 2 closed end of shell and the side end face of two pole shoes 3 of open end.It is provided in groove
Radial magnetizing type permanent-magnetic clamp 8, and the magnetic direction of radial magnetizing type permanent-magnetic clamp 8 is identical as the magnetic loop direction where it.
The quantity of the pole shoe 3 is preferably 4~20.
Claims (9)
1. a kind of ladder pole flute profile magnetic fluid sealing structure, including hollow shell (2), the shell (2) is closed at one end, another
End is opened wide, and is provided with through-hole at the closed end center of shell (2), is further included being worn from through-hole to the reciprocal axis of shell (2) inner cavity
It is (1), axially spaced in the space between reciprocal axis (1) outer surface and shell (2) inner wall to be equipped with multiple cyclic annular pole shoes (3),
Axial charging type permanent-magnetic clamp (7) is folded between two neighboring pole shoe (3), the magnetic pole of adjacent axial charging type permanent-magnetic clamp (7)
Polarity is opposite, it is characterised in that: it is equipped with the first pole tooth (6) at the periphery of reciprocal axis (1) and corresponding pole shoe (3) position,
There are gap between first pole tooth (6) and the inner headed face of pole shoe (3), gap location is marked with magnetic fluid；
First pole tooth (6) quantity corresponding to each pole shoe (3) has multiple, all first corresponding to the same pole shoe (3)
The outer diameter of pole tooth (6) is identical；
From high-pressure side to low pressure side direction, the outer diameter of the first pole tooth (6) corresponding to different pole shoes (3) is successively increased.
2. ladder pole flute profile magnetic fluid sealing structure according to claim 1, it is characterised in that: near shell (2)
The inner headed face of two pole shoes (3) of closed end and open end is equipped with the second pole tooth (10), and corresponding to the two pole shoes (3)
It is not provided with the first pole tooth (6) at the periphery of reciprocal axis (1), between existing between the second pole tooth (10) and reciprocal axis (1) periphery
Gap, gap location are marked with magnetic fluid.
3. ladder pole flute profile magnetic fluid sealing structure according to claim 1 or 2, it is characterised in that: near shell
(2) it is provided with groove on the side end face of two pole shoes (3) of closed end and open end, radial magnetizing type permanent-magnetic clamp is provided in groove
(8), and the magnetic direction of radial magnetizing type permanent-magnetic clamp (8) is identical as the magnetic loop direction where it.
4. ladder pole flute profile magnetic fluid sealing structure according to claim 1 or 2, it is characterised in that: each pole shoe (3)
With its corresponding to the first pole tooth (6) between relative movement distance be no more than the first pole tooth (6) corresponding to the pole shoe (3)
Total span.
5. ladder pole flute profile magnetic fluid sealing structure according to claim 1 or 2, it is characterised in that: first pole tooth
(6) equidistantly distributed.
6. ladder pole flute profile magnetic fluid sealing structure according to claim 1 or 2, it is characterised in that: in shell (2) inner wall
It is socketed with hollow magnetic shield (5), the periphery and magnetic shield (2) inner wall of all pole shoes (3) and axial charging type permanent-magnetic clamp (7)
It abuts.
7. ladder pole flute profile magnetic fluid sealing structure according to claim 1, it is characterised in that: the number of the pole shoe (3)
Amount is 2~20.
8. ladder pole flute profile magnetic fluid sealing structure according to claim 2, it is characterised in that: the number of the pole shoe (3)
Amount is 4~20.
9. ladder pole flute profile magnetic fluid sealing structure according to claim 1 or 2, it is characterised in that: near shell (2)
The pole shoe (3) of open end is compressed by end cap (4) and is sealed in shell (2) inner cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914065.5A CN108980358A (en) | 2018-08-13 | 2018-08-13 | A kind of ladder pole flute profile magnetic fluid sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914065.5A CN108980358A (en) | 2018-08-13 | 2018-08-13 | A kind of ladder pole flute profile magnetic fluid sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108980358A true CN108980358A (en) | 2018-12-11 |
Family
ID=64552916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810914065.5A Pending CN108980358A (en) | 2018-08-13 | 2018-08-13 | A kind of ladder pole flute profile magnetic fluid sealing structure |
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| Country | Link |
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| CN (1) | CN108980358A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112973A (en) * | 2020-10-30 | 2020-12-22 | 清华大学 | Combined sealing device of magnetorheological fluid and magnetic liquid |
| CN112728113A (en) * | 2021-01-29 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498939A (en) * | 2013-08-27 | 2014-01-08 | 北京交通大学 | Sealing device for improving sealing anti-pressure capability and sealing reliability of magnetic liquid |
| CN105570466A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical ladder type magnetic fluid sealing device |
| CN107893853A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of convex multi-diameter shaft device for sealing magnetic fluid |
| CN108006231A (en) * | 2017-12-13 | 2018-05-08 | 广西科技大学 | A kind of parallel connection type magnetic fluid reciprocating sealing device |
-
2018
- 2018-08-13 CN CN201810914065.5A patent/CN108980358A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498939A (en) * | 2013-08-27 | 2014-01-08 | 北京交通大学 | Sealing device for improving sealing anti-pressure capability and sealing reliability of magnetic liquid |
| CN105570466A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical ladder type magnetic fluid sealing device |
| CN107893853A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of convex multi-diameter shaft device for sealing magnetic fluid |
| CN108006231A (en) * | 2017-12-13 | 2018-05-08 | 广西科技大学 | A kind of parallel connection type magnetic fluid reciprocating sealing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112973A (en) * | 2020-10-30 | 2020-12-22 | 清华大学 | Combined sealing device of magnetorheological fluid and magnetic liquid |
| CN112112973B (en) * | 2020-10-30 | 2021-06-04 | 清华大学 | Combined sealing device of magnetorheological fluid and magnetic liquid |
| CN112728113A (en) * | 2021-01-29 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN112728113B (en) * | 2021-01-29 | 2022-04-12 | 清华大学 | Magnetic liquid sealing device |
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| PB01 | Publication | ||
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Application publication date: 20181211 |