CN1040085A - Device for sealing magnetic fluid - Google Patents
Device for sealing magnetic fluid Download PDFInfo
- Publication number
- CN1040085A CN1040085A CN 88104627 CN88104627A CN1040085A CN 1040085 A CN1040085 A CN 1040085A CN 88104627 CN88104627 CN 88104627 CN 88104627 A CN88104627 A CN 88104627A CN 1040085 A CN1040085 A CN 1040085A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- sealing
- yoke
- magnetic fluid
- seal arrangement
- 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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- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 title claims abstract description 21
- 239000000696 magnetic material Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- JDRSUTSRPJIADF-UHFFFAOYSA-N [Cu].[Co].[Ce] Chemical group [Cu].[Co].[Ce] JDRSUTSRPJIADF-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical group [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 10
- 239000000839 emulsion Substances 0.000 abstract 1
- 238000004945 emulsification Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The present invention relates to a kind of improved device for sealing magnetic fluid, by non-magnetic screen, magnetic source, yoke, sleeve constitutes.Magnetic source adopts the magnetic material with high energy product, and the yoke inner wall surface has circumferential recess and inclined-plane, and magnetic source and yoke outside are covered with non-magnetic screen, thereby can strengthen magnetic field gradient, prevent the emulsion at sealed liquid and magnetic fluid interface.The present invention not only can be used for the sealing to gas, and can be used for the sealing to liquid, and bearing capacity is higher, and working life is longer, and can realize not leaking fully.
Description
The present invention relates to a kind of device for sealing magnetic fluid, international classification number is F16J.
Before the present invention makes, adopt the contact-type mechanical seal structure mostly for the sealing of liquid.This structure can not guarantee not leak completely, particularly is subjected to sealing material wearing and tearing, aging easily, and Temperature Influence and cause leakage.
The clear 55-107163 of Japan Patent JP discloses a kind of device for sealing magnetic fluid, and this invention is between the housing that passes at axle and this, inserts one and contains the magnetic structure that permanent magnet constitutes.Between this magnetic structure and above-mentioned axle, formed a micro-gap that has the magnetic line of force to pass through, the injection magnetic fluid crack in during this time, thus reach the purpose of sealing.
The deficiency of this device is the sealing that can only be used for gas, and is not suitable for the sealing to liquid, because it can not prevent the leakage that causes because of factors such as emulsifications between the liquid that will seal and magnetic fluid interface.In addition,, not only to consider constantly to replenish magnetic fluid, and cause magnetic fluid unstable and lose sealing function because the carrier volatility of the magnetic fluid that its uses is stronger.
The objective of the invention is to avoid above-mentioned the deficiencies in the prior art and a kind of improved device for sealing magnetic fluid is provided, it both had been applicable to the sealing to gas, also was applicable to the sealing to liquid.
Task of the present invention is finished as follows:
The present invention proposes a kind of improved device for sealing magnetic fluid, constitute, it is characterized in that by sleeve (3), magnetic source (4), yoke (5):
A. magnetic source (4) and yoke (5) outside is covered with non-magnetic screen (1), and it not only can prevent dust, and there is shielding action in magnetic field, can strengthen magnetic field gradient, thereby improves the magnetic fluid bearing capacity, prevents that sealed liquid and magnetic fluid interface from emulsification taking place.Non-magnetic screen (1) can adopt any nonmagnetic substance to make, for example copper, aluminium etc.;
B. adopt magnetic material as magnetic source (4), NdFeB material for example, cerium cobalt copper product, samarium-cobalt material etc. with high energy product;
C. on the inner wall surface of yoke (5), have circumferential groove 2～10 circle/centimetre, and inclined-plane, groove are arranged can be rectangle, pointed shape, and the tilt angle on inclined-plane is 30 °-50 °, these grooves and inclined-plane can guarantee higher magnetic field gradient, prevent sealed liquid and magnetic fluid interface emulsification.
Comparison prior art of the present invention has following advantage:
1. both can be used for sealing, also be applicable to sealing liquid to gas.
2. can guarantee not leak fully.
3. bearing capacity is higher.
4. working life is longer.
The drawing of accompanying drawing is described as follows:
Fig. 1 is embodiment 1 a concrete structure schematic representation.
Fig. 2 is embodiment 2 a concrete structure schematic representation.
The present invention will be described in further detail as follows in conjunction with the accompanying drawings:
Fig. 1 is embodiment 1 a structural representation.Magnetic source (4) with high energy product is sandwiched between two annular yokes (5), by magnetic source (4), yoke (5) and sleeve (3) form a closed magnetic loop, and magnetic fluid is injected in the gap between yoke (5) and the sleeve (3) and plays seal action.Two circumferential recess (8) are arranged on the inwall of yoke (5), and inclined-plane (9) is arranged, the outside is covered with non-magnetic screen (1), thereby can guarantee that magnetic fluid works under high magnetic field gradient, prevents by the emulsification between sealing liquid body and magnetic fluid interface.
Fig. 2 is embodiment 2 a structural representation.Magnetic source (4) adopts axial magnetic rings, and with yoke (5), sleeve (3) forms closed magnetic loop.Magnetic fluid (6) is concentrated in groove (8), magnetic source (4) and the formed slit of sleeve (3) and plays sealing.
Claims (8)
1, a kind of device for sealing magnetic fluid, by magnetic source (4), yoke (5), sleeve (3) constitutes, and it is characterized in that:
A. magnetic source (4) and yoke (5) outside is covered with non-magnetic screen (1),
B. magnetic source (4) adopts the magnetic material with high energy product,
C. the inner wall surface of yoke (5) fluted (8) and inclined-plane (9).
2,, it is characterized in that non-magnetic screen (1) makes with copper product by the seal arrangement of claim 1 defined.
3,, it is characterized in that non-magnetic screen (1) makes with aluminium material by the seal arrangement of claim 1 defined.
4, by the seal arrangement of claim 1 defined, the tilt angle that it is characterized in that inclined-plane (9) is 30 °-50 °.
5, by the seal arrangement of claim 1 or 4 defineds, it is characterized in that groove on the yoke (5) have 2～10 circles/centimetre.
6, by the seal arrangement of claim 1 or 4 defineds, it is characterized in that said material with high energy product is a NdFeB material.
7, by the seal arrangement of claim 1 or 4 defineds, it is characterized in that said material with high energy product is a cerium cobalt copper product.
8, by the seal arrangement of claim 1 or 4 defineds, it is characterized in that said material with high energy product is a samarium-cobalt material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104627 CN1011061B (en) | 1988-07-30 | 1988-07-30 | Sealing device of magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104627 CN1011061B (en) | 1988-07-30 | 1988-07-30 | Sealing device of magnetic fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1040085A true CN1040085A (en) | 1990-02-28 |
| CN1011061B CN1011061B (en) | 1991-01-02 |
Family
ID=4833079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88104627 Expired CN1011061B (en) | 1988-07-30 | 1988-07-30 | Sealing device of magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1011061B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370073A (en) * | 2014-11-25 | 2015-02-25 | 中国矿业大学 | Carrier roller sealed by magnetic liquid |
-
1988
- 1988-07-30 CN CN 88104627 patent/CN1011061B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370073A (en) * | 2014-11-25 | 2015-02-25 | 中国矿业大学 | Carrier roller sealed by magnetic liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1011061B (en) | 1991-01-02 |
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Legal Events
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |