CN2837563Y - Magnetic fluid sealing device - Google Patents
Magnetic fluid sealing device Download PDFInfo
- Publication number
- CN2837563Y CN2837563Y CN 200520052744 CN200520052744U CN2837563Y CN 2837563 Y CN2837563 Y CN 2837563Y CN 200520052744 CN200520052744 CN 200520052744 CN 200520052744 U CN200520052744 U CN 200520052744U CN 2837563 Y CN2837563 Y CN 2837563Y
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- magnetic fluid
- gas
- utility
- hole
- housing
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- Expired - Lifetime
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides a magnetic fluid sealing device for a centrifugal draught fan for conveying gas which is saturated or unsaturated, or inflammable and explosive, virulent and corrosive in high temperature. The utility model comprises a coaxial casing, a shaft sleeve, a permanent magnet which is arranged between an inner cavity of the casing and the shaft sleeve, a magnetic fluid and a pole shoe, wherein a radical through hole is arranged on a mounting flange of the casing, and the position on the outer wall of the shaft sleeve, which is corresponding to the radical through hole, is provided with a gas surrounding structure which is composed of a ring groove for gas introduction and a plurality of expanding ring grooves. The magnetic fluid sealing device of the utility model has the advantages of good sealing effect, simple structure, convenient assembly and folding, and long service life.
Description
Technical field
The utility model relates to a kind of device for sealing magnetic fluid, relates in particular under the higher temperature centrifugal blower device for sealing magnetic fluid of gases such as carrying saturated/diluted colour or inflammable and explosive, poisonous deep-etching.
Background technique
At present, during with centrifugal blower conveying gas medium, the seal form between centrifugal blower running shaft and casing can have multiple, and adopting the running shaft magnet fluid sealing is one of them.Magnetic fluid be a kind of nanometer ferromagnetic particle under the coating of surface active agent, stably be dispersed in the carrier fluid and a kind of colloid of forming, both had the flowability of liquid, have magnetic again, at permanent magnet, pole shoe, in the gap of the magnetic loop that axle sleeve constituted, the create antagonism magnetic force of extraneous pressure reduction plays seal action, belongs to no mechanical contact seal, can realize zero leakage completely, its resistance is also little, when working in surpassing 80 ℃ of temperature, need cool off.But because the condensed liquid of hot gas of inflammable and explosive deep-etchings such as acetone, ethanol, acid, alkali has demagnetizing effect to magnetic fluid, seal failure when therefore carrying these hot gass.
The model utility content
The utility model is at above-mentioned deficiency, and the centrifugal blower device for sealing magnetic fluid of gases such as carrying saturated or diluted colour or inflammable and explosive, poisonous deep-etching under a kind of higher temperature is provided, good sealing effect, and mechanism is simple and easy to adorn, tear long service life open.
Device for sealing magnetic fluid of the present utility model comprises coaxial housing, axle sleeve, place permanent magnet, magnetic fluid and the pole shoe of housing inner chamber and shaft room, it is characterized in that: design has a radial direction through hole on the mounting flange of described housing, and the outer wall of described axle sleeve designs at the described radial direction through hole of correspondence place by introduced the gas-circulating structure that annular groove and some expansion annular grooves that places gas to introduce the annular groove both sides are formed by gas.
Because design has the gas-circulating structure in device for sealing magnetic fluid, can be with shielding gas such as nitrogen a little more than sealed medium pressure, the gas that imports this gas-circulating structure by the radial direction through hole on the housing mounting flange is introduced annular groove.The shielding gas of introducing is through coaxial housing; the passage that the gap of shaft room and a plurality of swollen annular groove that rises are formed; can produce very big energy loss; again since the pressure of introducing shielding gas a little more than sealed saturated or diluted colour; or it is inflammable and explosive; the pressure of gases such as poisonous deep-etching; flow in therefore a small amount of shielding gas one side direction magnetic fluid place; be subjected to magnetic fluid seal; other has a small amount of shielding gas to flange plate one side flow; and the sealed gas of flange plate one side can not arrive the magnetic fluid place by the gap and the gas-circulating structure of housing and shaft room; thereby protected magnetic fluid, the seal failure of having avoided degaussing to cause.Because the throttling action of gas-circulating structure also only consumes less shielding gas.Device for sealing magnetic fluid of the present utility model has been realized two-way zero leakage, safety, environmental protection, long service life.
Description of drawings
Fig. 1 is the schematic representation of device for sealing magnetic fluid of the present utility model;
Fig. 2 is the A portion enlarged diagram of Fig. 1.
Embodiment
As shown in Figure 1, 2, device for sealing magnetic fluid of the present utility model comprises coaxial mounted housing 1, axle sleeve 2, places magnetic fluid 4, permanent magnet 3 and the pole shoe 5 of 2 on housing 9 inner chambers and axle sleeve.Design has a radial direction through hole 1a on the mounting flange of housing 1, design is by introduced the gas-circulating structure that annular groove 2a and expansion annular groove 2b form by gas on the outer wall of axle sleeve, gas is introduced the radial direction through hole 1a on the annular groove 2a corresponding housing mounting flange, and several expansion annular groove 2b place gas to introduce annular groove 2a both sides respectively.During work, be connected with centrifugal blower etc. by the housing mounting flange, gas such as sealed inflammable and explosive, poisonous deep-etching enters other passages by axle sleeve 2 endoporus.Import to the shielding gas (as nitrogen) of pressure a little more than sealed gas the gas introducing annular groove 2a from radial direction through hole 1a this moment, and the gap and the gas that have been full of coaxial housing, shaft room are introduced among annular groove 2a, the swollen annular groove 2b that rises; Flowing in one side direction magnetic fluid, 4 places, is subjected to magnetic fluid 4 sealings; Other has the part shielding gas to flange plate one side flow; because shielding gas pressure is slightly high; the sealed gas of flange plate one side can not arrive magnetic fluid 4 places by the gap and the gas-circulating structure of 2 on housing 1 and axle sleeve; avoided after the hot gas condensation of inflammable and explosive deep-etching demagnetizing effect, thereby protected magnetic fluid 4, realized two-way zero leakage magnetic fluid; also prolonged the working life of device for sealing magnetic fluid; safety and environmental protection, and simple in structure, adorn, tear open conveniently.
Claims (1)
1, a kind of device for sealing magnetic fluid, comprise coaxial housing (1), axle sleeve (2), place permanent magnet (3), magnetic fluid (4) and pole shoe (5) between housing (1) inner chamber and axle sleeve (2), it is characterized in that: design has a radial direction through hole (1a) on the mounting flange of described housing (1), and the outer wall of described axle sleeve (2) is located design at the described radial direction through hole of correspondence (1a) the gas-circulating structure of being made up of gas introducing annular groove (2a) and some expansion annular grooves (2b) that places gas to introduce annular groove (2a) both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052744 CN2837563Y (en) | 2005-12-13 | 2005-12-13 | Magnetic fluid sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052744 CN2837563Y (en) | 2005-12-13 | 2005-12-13 | Magnetic fluid sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2837563Y true CN2837563Y (en) | 2006-11-15 |
Family
ID=37392048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520052744 Expired - Lifetime CN2837563Y (en) | 2005-12-13 | 2005-12-13 | Magnetic fluid sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2837563Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482213A (en) * | 2014-12-15 | 2015-04-01 | 青岛科技大学 | Internal mixer rotor sealing device |
| CN108692032A (en) * | 2018-06-26 | 2018-10-23 | 清华大学 | A kind of magnetic fluid seal device of Multilevel partial-pressure |
| CN110821944A (en) * | 2019-10-25 | 2020-02-21 | 库卡机器人制造（上海）有限公司 | Sleeve fluid conveying device |
| CN114251367A (en) * | 2021-11-25 | 2022-03-29 | 广西科技大学 | Hybrid magnetic fluid sealing device for bearing |
-
2005
- 2005-12-13 CN CN 200520052744 patent/CN2837563Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482213A (en) * | 2014-12-15 | 2015-04-01 | 青岛科技大学 | Internal mixer rotor sealing device |
| CN108692032A (en) * | 2018-06-26 | 2018-10-23 | 清华大学 | A kind of magnetic fluid seal device of Multilevel partial-pressure |
| CN108692032B (en) * | 2018-06-26 | 2020-07-28 | 清华大学 | Magnetic fluid sealing device with multi-stage partial pressure |
| CN110821944A (en) * | 2019-10-25 | 2020-02-21 | 库卡机器人制造（上海）有限公司 | Sleeve fluid conveying device |
| CN110821944B (en) * | 2019-10-25 | 2021-04-02 | 库卡机器人制造（上海）有限公司 | Sleeve fluid conveying device |
| CN114251367A (en) * | 2021-11-25 | 2022-03-29 | 广西科技大学 | Hybrid magnetic fluid sealing device for bearing |
| CN114251367B (en) * | 2021-11-25 | 2023-10-27 | 广西科技大学 | Mixed magnetic fluid sealing device for bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061115 |
|
| EXPY | Termination of patent right or utility model |