CN207569210U - A kind of reciprocating motion magnetic fluid sealing structure - Google Patents
A kind of reciprocating motion magnetic fluid sealing structure Download PDFInfo
- Publication number
- CN207569210U CN207569210U CN201721731139.9U CN201721731139U CN207569210U CN 207569210 U CN207569210 U CN 207569210U CN 201721731139 U CN201721731139 U CN 201721731139U CN 207569210 U CN207569210 U CN 207569210U
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- CN
- China
- Prior art keywords
- pole shoe
- magnetic fluid
- pole
- type seal
- seal ring
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of reciprocating motion magnetic fluid sealing structures, including hollow housing, it is set to the reciprocal axis of housing cavity, at least one permanent magnet, each permanent magnet both sides is respectively equipped with pole shoe, it is at least opened there are one groove around the inner headed face of each pole shoe, y-type seal ring is installed in each groove；The inner headed face of pole shoe is equipped with pole tooth, and there are gaps, gap location between pole tooth and reciprocal axis outer surface to be marked with magnetic fluid.The utility model is applied in combination by magnetic fluid and y-type seal ring, forms the excellent sealing structure of pressure-resistant performance and sealing performance.Moreover, because magnet fluid sealing has dustproof effect, pollution of the introduced contaminants to y-type seal ring is reduced, the clarity of sealed medium is improved, maximumlly improves the service life of sealing ring, realize zero leakage and the requirement of long-life.
Description
Technical field
The utility model is related to a kind of reciprocating motion magnetic fluid sealing structures.
Background technology
The magnetic fluid sealing structure for being currently used for axis reciprocating motion generally comprises the housing with hollow cavity, axis, axis and housing
Between setting permanent magnet and pole shoe carry out magnet fluid sealing, pole shoe inner ring be equipped with pole tooth.
One of method for improving magnetic fluid seal pressure resistance performance is the number by increasing magnetic source in magnet fluid sealing magnetic circuit
The shape of pole shoe is measured and improves, the sealing device as described in the patent of Publication No. CN105003654A and CN206617583U.
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：
Due to there is fretting wear, cause it that can not realize zero leakage and long life requirement simultaneously.It is reciprocal in axis
In movement, partially liq forms liquid film；When magnetic field force is not enough to fetter this tunic, magnetic fluid will under differential pressure action into
Enter secret room, pollute.Because liquid viscosity declines under high temperature, resistance to pressure declines, so usually coordinating refrigeration measure.
It is sealed using single-stage or multi-stage sealed, what is mainly influenced is sealing performance, and the influence to pressure-resistant performance is not
Greatly, the pressure-resistant poor performance of entire sealing structure.
Utility model content
In view of the above-mentioned problems, the utility model is intended to provide one kind can improve sealing performance and pressure-resistant performance simultaneously, with
Realize the reciprocating motion magnetic fluid sealing structure of zero leakage and long life requirement.
The technical solution that the utility model solves the problems, such as is：A kind of reciprocating motion magnetic fluid sealing structure, including hollow
Housing, be set to the reciprocal axis of housing cavity, being equipped in the radial direction extremely between reciprocal axis outer surface and inner walls
A few permanent magnet, each permanent magnet both sides are respectively equipped with pole shoe, at least open around the inner headed face of each pole shoe there are one
Groove is equipped with y-type seal ring in each groove；
The inner headed face of pole shoe is equipped with pole tooth, and there are gaps, gap location between pole tooth and reciprocal axis outer surface to be marked with magnetic fluid.
In said program, the use of y-shaped ring so that voltage endurance capability is multiplied while leakproofness is strengthened.Y shape is close
Seal is affixed on sealing pair coupled face by the lip of its opening.During without internal pressure, only connecing for very little is generated due to the deformation of procheilon
Touch pressure.In the case of sealing, there are the normal pressure equal with pressure medium, institute on the every bit that is contacted with sealing medium
Will be axially compressed with lip-shaped ring bottom, lip is contacted with sealing surface and is broadened, while contact stress increases by circumferential compression
Add.When internal pressure increases again, the distribution form and size of contact further change, and lip coordinates closer with sealing surface.
Since y-shaped ring can greatly improve voltage endurance capability, magnet fluid sealing has good sealing performance, magnetic fluid
Sealing has dustproof effect, reduces pollution of the introduced contaminants to y-type seal ring, improves the clarity of sealed medium, maximum
The service life for improving sealing ring changed, the two are used cooperatively, it can be achieved that zero leakage and the requirement of long-life.
Preferably, on that pole shoe near high-pressure side, the y-type seal ring set by inner headed face is than pole dental transition
Close to high-pressure side.
Due to the voltage endurance capability chamber of y-type seal ring, it is allowed closer to high-pressure side, and the magnet fluid sealing energy beside it
It is enough to be sealed well, reduce pollution of the introduced contaminants to y-type seal ring.
Preferably, on that pole shoe near low-pressure end, the pole tooth set by inner headed face is than y-type seal ring more
Close to low-pressure end.
Magnet fluid sealing is allowed to can be good at being sealed close to low-pressure end, reduces dirt of the introduced contaminants to y-type seal ring
Dye.
Preferably, the quantity of the permanent magnet is 2~10.
In a kind of specific scheme, on that pole shoe near high-pressure side, the Y types sealing set by inner headed face
Circle is than pole dental transition close to high-pressure side；
On that pole shoe near low-pressure end, pole tooth set by inner headed face is than y-type seal ring closer to low
Pressure side；
On the pole shoe between the pole shoe of both ends, y-type seal ring is set among inner headed face, and it is close that pole tooth is distributed in Y types
The both sides of seal.
Said structure design increases the self-reparing capability of sealing device, even if the magnetic fluid leakage of high-pressure side, in being located at
Between pole shoe also there is magnet fluid sealing, y-type seal ring still can play the effect of high voltage.
Preferably, the y-type seal ring quantity on each pole shoe is 1~5.
It is sealed between pole shoe periphery and inner walls by ring type seal.
Described housing cavity one end is equipped with step, that pole shoe near high-pressure side is abutted with the step, near
That pole shoe of low-pressure end is sealed in housing cavity by end cap compression.
The utility model is applied in combination by magnetic fluid and y-type seal ring, solves the pressure resistance of reciprocating movement sealing structure
The problem of scarce capacity is utilized the characteristics of y-type seal ring voltage endurance capability is strong and magnet fluid sealing ability is strong, forms pressure resistance
Performance and the excellent sealing structure of sealing performance.Moreover, because magnet fluid sealing has dustproof effect, introduced contaminants pair are reduced
The pollution of y-type seal ring, improves the clarity of sealed medium, maximumlly improves the service life of sealing ring, realizes
The requirement of zero leakage and long-life.
Description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the utility model magnetic fluid sealing structure sectional view.
In figure：The reciprocal axis of 1-, 2- housings, 3- pole shoes, 4- ring type seals, 5-Y type sealing rings, 6- poles tooth, 7- permanent magnets,
8- end caps, 9- steps.
Specific embodiment
As shown in Figure 1, a kind of reciprocating motion magnetic fluid sealing structure, including hollow housing 2, is set in housing 2
The reciprocal axis 1 of chamber is equipped at least one permanent magnet 7, often in the radial direction between reciprocal 1 outer surface of axis and 2 inner wall of housing
One 7 both sides of permanent magnet is respectively equipped with pole shoe 3.The inner headed face of pole shoe 3 is equipped with pole tooth 6, between pole tooth 6 and reciprocal 1 outer surface of axis
There are gap, gap location is marked with magnetic fluid.
Described 2 inner cavity one end of housing is equipped with step 9, that pole shoe 3 near high-pressure side is abutted with the step 9, most
That pole shoe 3 close to low-pressure end is sealed in 2 inner cavity of housing by the compression of end cap 8.
It is at least opened there are one groove around the inner headed face of each pole shoe 3, y-type seal ring 5 is installed in each groove.
The permanent magnet 7 is axial charging type permanent magnet, and quantity is 2.
On that pole shoe 3 near high-pressure side, opened around the inner headed face of pole shoe 3 there are two groove, each is recessed
Y-type seal ring 5 is installed, the y-type seal ring 5 set by its inner headed face of pole shoe 3 is than pole tooth 6 closer to high-pressure side in slot.
On that pole shoe 3 near low-pressure end, opened around the inner headed face of pole shoe 3 there are two groove, each is recessed
Y-type seal ring 5 is installed, the pole tooth 6 set by 3 inner headed face of pole shoe is than y-type seal ring 5 closer to low-pressure end in slot.
It on the pole shoe between both ends pole shoe 3, is opened around the inner headed face of pole shoe 3 there are one groove, groove is interior to be installed
There is y-type seal ring 5, y-type seal ring 5 is set among inner headed face, and pole tooth 6 is distributed in the both sides of y-type seal ring 5.
It is sealed between 2 inner wall of 3 periphery of pole shoe and housing by ring type seal 4.
Claims (8)
1. a kind of reciprocating motion magnetic fluid sealing structure, including hollow housing（2）, be set to housing（2）Inner cavity it is reciprocal
Axis（1）, in reciprocal axis（1）Outer surface and housing（2）It is equipped at least one permanent magnet in the radial direction between inner wall（7）, often
One permanent magnet（7）Both sides are respectively equipped with pole shoe（3）, it is characterised in that：Around each pole shoe（3）Inner headed face be at least provided with
One groove is equipped with y-type seal ring in each groove（5）；
Pole shoe（3）Inner headed face be equipped with pole tooth（6）, pole tooth（6）With reciprocal axis（1）There are gap, gap location notes between outer surface
There is magnetic fluid.
2. reciprocating motion magnetic fluid sealing structure according to claim 1, it is characterised in that：Near high-pressure side
That pole shoe（3）On, the y-type seal ring set by inner headed face（5）Than pole tooth（6）Closer to high-pressure side.
3. reciprocating motion magnetic fluid sealing structure according to claim 1 or 2, it is characterised in that：Near low pressure
That pole shoe at end（3）On, the pole tooth set by inner headed face（6）Compare y-type seal ring（5）Closer to low-pressure end.
4. reciprocating motion magnetic fluid sealing structure according to claim 1, it is characterised in that：The permanent magnet（7）'s
Quantity is 2~10.
5. reciprocating motion magnetic fluid sealing structure according to claim 4, it is characterised in that：Near high-pressure side
That pole shoe（3）On, the y-type seal ring set by inner headed face（5）Than pole tooth（6）Closer to high-pressure side；
In that pole shoe near low-pressure end（3）On, the pole tooth set by inner headed face（6）Compare y-type seal ring（5）More lean on
Nearly low-pressure end；
Positioned at both ends pole shoe（3）Between pole shoe on, y-type seal ring（5）It is set among inner headed face, pole tooth（6）It is distributed in Y
Type sealing ring（5）Both sides.
6. reciprocating motion magnetic fluid sealing structure according to claim 1, it is characterised in that：Each pole shoe（3）On Y
Type sealing ring（5）Quantity is 1~5.
7. reciprocating motion magnetic fluid sealing structure according to claim 1, it is characterised in that：Pole shoe（3）Periphery with
Housing（2）Pass through ring type seal between inner wall（4）Sealing.
8. reciprocating motion magnetic fluid sealing structure according to claim 1, it is characterised in that：The housing（2）Inner cavity
One end is equipped with step（9）, near that pole shoe of high-pressure side（3）With the step（9）It abuts, near that of low-pressure end
A pole shoe（3）Pass through end cap（8）Compression is sealed in housing（2）Inner cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721731139.9U CN207569210U (en) | 2017-12-13 | 2017-12-13 | A kind of reciprocating motion magnetic fluid sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721731139.9U CN207569210U (en) | 2017-12-13 | 2017-12-13 | A kind of reciprocating motion magnetic fluid sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207569210U true CN207569210U (en) | 2018-07-03 |
Family
ID=62687935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721731139.9U Expired - Fee Related CN207569210U (en) | 2017-12-13 | 2017-12-13 | A kind of reciprocating motion magnetic fluid sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207569210U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893854A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of reciprocating motion magnetic fluid sealing structure |
| CN108869752A (en) * | 2018-08-13 | 2018-11-23 | 广西科技大学 | A kind of change tooth change gap hybrid magnetic fluid seal structure for hydraulic cylinder |
-
2017
- 2017-12-13 CN CN201721731139.9U patent/CN207569210U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893854A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of reciprocating motion magnetic fluid sealing structure |
| CN108869752A (en) * | 2018-08-13 | 2018-11-23 | 广西科技大学 | A kind of change tooth change gap hybrid magnetic fluid seal structure for hydraulic cylinder |
| CN108869752B (en) * | 2018-08-13 | 2020-05-19 | 广西科技大学 | Tooth-variable and gap-variable mixed type magnetic fluid sealing structure for hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180703 Termination date: 20181213 |