CN108980359A - A kind of novel magnetic fluid sealing structure - Google Patents
A kind of novel magnetic fluid sealing structure Download PDFInfo
- Publication number
- CN108980359A CN108980359A CN201810914080.XA CN201810914080A CN108980359A CN 108980359 A CN108980359 A CN 108980359A CN 201810914080 A CN201810914080 A CN 201810914080A CN 108980359 A CN108980359 A CN 108980359A
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- China
- Prior art keywords
- pole
- pole shoe
- fluid sealing
- shell
- magnetic fluid
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- 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
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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 invention discloses a kind of novel magnetic fluid sealing structures, including hollow shell, axially spaced in the space between axis outer surface and inner walls to be equipped with multiple pole shoes, pole shoe is ring-type, pole shoe periphery is abutted with inner walls, pole shoe inner headed face is equipped with pole tooth, is folded with permanent magnet between two neighboring pole shoe, there are gaps between pole tooth and axis outer surface, gap location is marked with magnetic fluid, from high-pressure side to low pressure side direction, width of pole shoe is incremented by successively, and the pole number of teeth amount on pole shoe is incremented by successively；Permanent magnet is axial charging type permanent-magnetic clamp, and the polarity of the magnetic pole of adjacent permanent magnet is opposite.The present inventor is that the magnet fluid sealing ability under the pole shoe of high-pressure side that produces is less than magnet fluid sealing ability under low-pressure side pole shoe, from high-pressure side to low-pressure side, the voltage endurance capability of pole shoe is gradually increasing, so that magnet fluid sealing can play a role under all pole shoes, 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 novel magnetic fluid sealing structure.
Background technique
The magnetic fluid sealing structure for being currently used for axis reciprocating motion generally comprises the shell with hollow cavity, axis, axis and shell
Between permanent magnet and pole shoe are set carry 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:
In the Multi-level sealing structure of the prior art, the pole number of teeth amount on each pole shoe is all identical.Inventor tests discovery from height
Side is pressed to arrive low-pressure side, in two neighboring pole shoe, if high-pressure side pole shoe magnet fluid sealing voltage endurance capability is greater than adjacent low-pressure side magnetic current
When body seals voltage endurance capability, low-pressure side magnet fluid sealing can not work, that is to say, that the sealing of low-pressure side is performed practically no function.For
For Multi-level sealing structure, since the magnet fluid sealing of low-pressure side can not play a role, then the pole shoe of excessive series is arranged only
The volume that will increase magnetic fluid sealing structure wastes more costs.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of magnet fluid sealing knot that all pole shoes can be allowed all to play a role
Structure.
The technical solution that the present invention solves the problems, such as is: a kind of novel magnetic fluid sealing structure, described including hollow shell
Shell is closed at one end, the other end is unlimited, is provided with through-hole at the closed end center of shell, further includes wearing from through-hole to shell
The axis of chamber, axially spaced in the space between axis outer surface and inner walls to be equipped with multiple pole shoes, the pole shoe is ring-type,
Pole shoe periphery is abutted with inner walls, and pole shoe inner headed face is equipped with pole tooth, is folded with permanent magnet, pole between two neighboring pole shoe
There are gap between tooth and axis outer surface, gap location is marked with magnetic fluid, and from high-pressure side to low pressure side direction, width of pole shoe is successively passed
Increase, the pole number of teeth amount on pole shoe is incremented by successively；
The permanent magnet is axial charging type permanent-magnetic clamp, and the polarity of the magnetic pole of adjacent permanent magnet is opposite.
Above scheme changes existing structure, width of pole shoe is changed, there is also variations for the corresponding number of teeth.Pass through structure
Variation artificially produces under the pole shoe of high-pressure side magnet fluid sealing ability and is less than magnet fluid sealing ability under low-pressure side pole shoe, can be with
Guarantee does not occur defect situation described in background technique.From high-pressure side to low-pressure side, the voltage endurance capability of pole shoe is gradually increasing, so that
Magnet fluid sealing can play a role under all pole shoes, ensure that the pressure-resistant performance of sealing.
Preferably, the pole number of teeth amount on adjacent pole shoe differs 1 or 2.
Preferably, the pole number of teeth amount on each pole shoe is 1~15.
Further, magnetism-isolating loop is equipped between that pole shoe and housings close end inner wall at housings close end.
Further, housing cavity is sealed in by end cap compression near that pole shoe of shell open end.
Preferably, the quantity of the permanent magnet is 1~10.
Preferably, the quantity of the pole shoe is 2~10.
Preferably, the gap size between pole tooth and axis outer surface is 0.05~3mm.
The present invention artificially produces magnet fluid sealing ability under the pole shoe of high-pressure side and is less than low pressure side pole by the variation of structure
Magnet fluid sealing ability under boots, from high-pressure side to low-pressure side, the voltage endurance capability of pole shoe is gradually increasing, so that magnetic current under all pole shoes
Body sealing can play a role, and ensure that the pressure-resistant performance of sealing.
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: 1- axis, 2- shell, 3- pole shoe, 4- end cap, 5- magnetism-isolating loop, the pole 6- tooth, 7- permanent magnet.
Specific embodiment
As shown in Figure 1, a kind of novel magnetic fluid sealing structure, including hollow shell 2, the shell 2 is closed at one end, another
Open at one end.Through-hole is provided at the closed end center of shell 2.
It further include being worn from through-hole to the axis 1 of 2 inner cavity of shell.Edge in space between 2 inner wall of 1 outer surface of axis and shell
Axially spaced-apart is equipped with multiple pole shoes 3.
The pole shoe 3 is ring-type, and 3 periphery of pole shoe is abutted with 2 inner wall of shell.3 inner headed face of pole shoe is equipped with pole tooth 6.Phase
Permanent magnet 7 is folded between adjacent two pole shoes 3.There are gap between 1 outer surface of pole tooth 6 and axis, gap location is marked with magnetic fluid.
From high-pressure side to low pressure side direction, 3 width of pole shoe is incremented by successively, and 6 quantity of pole tooth on pole shoe 3 is incremented by successively.
The permanent magnet 7 is axial charging type permanent-magnetic clamp.The polarity of the magnetic pole of adjacent permanent magnet is opposite.
6 quantity of pole tooth on adjacent pole shoe 3 differs 1 or 2.
6 quantity of pole tooth on each pole shoe 3 is 1~15.
The quantity of the permanent magnet 7 is 1~10.
The quantity of the pole shoe 3 is 2~10.
Gap size between 1 outer surface of pole tooth 6 and axis is 0.05~3mm.
Magnetism-isolating loop 5 is equipped between the 2 closed end inner wall of that pole shoe 3 and shell of 2 closed end of shell.Near
That pole shoe 3 of 2 open end of shell is sealed in 2 inner cavity of shell by the compression of end cap 4.
Claims (8)
1. a kind of novel magnetic fluid sealing structure, including hollow shell (2), the shell (2) is closed at one end, the other end is spacious
It opens, is provided with through-hole at the closed end center of shell (2), further include being worn from through-hole to the axis (1) of shell (2) inner cavity, in axis
(1) axially spaced in the space between outer surface and shell (2) inner wall to be equipped with multiple pole shoes (3), the pole shoe (3) is ring
Shape, pole shoe (3) periphery are abutted with shell (2) inner wall, and pole shoe (3) inner headed face is equipped with pole tooth (6), two neighboring pole shoe (3)
Between be folded with permanent magnet (7), there are gap between pole tooth (6) and axis (1) outer surface, gap location is marked with magnetic fluid, feature
Be: from high-pressure side to low pressure side direction, pole shoe (3) width is incremented by successively, and pole tooth (6) quantity on pole shoe (3) is incremented by successively；
The permanent magnet (7) is axial charging type permanent-magnetic clamp, and the polarity of the magnetic pole of adjacent permanent magnet is opposite.
2. novel magnetic fluid sealing structure according to claim 1, it is characterised in that: the pole tooth (6) on adjacent pole shoe (3)
Quantity differs 1 or 2.
3. novel magnetic fluid sealing structure according to claim 1 or 2, it is characterised in that: the pole tooth on each pole shoe (3)
(6) quantity is 1~15.
4. novel magnetic fluid sealing structure according to claim 1, it is characterised in that: near shell (2) closed end
Magnetism-isolating loop (5) are equipped between that pole shoe (3) and shell (2) closed end inner wall.
5. novel magnetic fluid sealing structure according to claim 1, it is characterised in that: near shell (2) open end
That pole shoe (3) is compressed by end cap (4) and is sealed in shell (2) inner cavity.
6. novel magnetic fluid sealing structure according to claim 1, it is characterised in that: the quantity of the permanent magnet (7) is 1
~10.
7. novel magnetic fluid sealing structure according to claim 1, it is characterised in that: the quantity of the pole shoe (3) be 2~
10.
8. novel magnetic fluid sealing structure according to claim 1, it is characterised in that: pole tooth (6) and axis (1) outer surface it
Between gap size be 0.05~3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914080.XA CN108980359B (en) | 2018-08-13 | 2018-08-13 | Magnetic fluid sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914080.XA CN108980359B (en) | 2018-08-13 | 2018-08-13 | Magnetic fluid sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108980359A true CN108980359A (en) | 2018-12-11 |
| CN108980359B CN108980359B (en) | 2020-05-05 |
Family
ID=64552978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810914080.XA Active CN108980359B (en) | 2018-08-13 | 2018-08-13 | Magnetic fluid sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108980359B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963685A (en) * | 2019-09-12 | 2020-11-20 | 杨春花 | Combined cartridge type dynamic seal based on magnetic fluid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546890A (en) * | 2003-12-10 | 2004-11-17 | 北京交通大学 | Sealing device with uniformly distributed magnetic liquid |
| CN106884988A (en) * | 2017-01-16 | 2017-06-23 | 北京交通大学 | Magnetic fluid seal device magnetic liquid air pressure injection method |
-
2018
- 2018-08-13 CN CN201810914080.XA patent/CN108980359B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546890A (en) * | 2003-12-10 | 2004-11-17 | 北京交通大学 | Sealing device with uniformly distributed magnetic liquid |
| CN106884988A (en) * | 2017-01-16 | 2017-06-23 | 北京交通大学 | Magnetic fluid seal device magnetic liquid air pressure injection method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963685A (en) * | 2019-09-12 | 2020-11-20 | 杨春花 | Combined cartridge type dynamic seal based on magnetic fluid |
| CN111963685B (en) * | 2019-09-12 | 2022-05-06 | 格尔减速机(南通)有限公司 | Combined cartridge type dynamic seal based on magnetic fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108980359B (en) | 2020-05-05 |
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