CN202301967U - Thermal insulation type magnetic fluid sealing device - Google Patents
Thermal insulation type magnetic fluid sealing device Download PDFInfo
- Publication number
- CN202301967U CN202301967U CN2011204437847U CN201120443784U CN202301967U CN 202301967 U CN202301967 U CN 202301967U CN 2011204437847 U CN2011204437847 U CN 2011204437847U CN 201120443784 U CN201120443784 U CN 201120443784U CN 202301967 U CN202301967 U CN 202301967U
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- sealing
- magnetic fluid
- bearing
- rotating shaft
- housing
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Abstract
The utility model discloses a thermal insulation type magnetic fluid sealing device which comprises a rotating shaft, a sealing pair internally provided with a rotating shaft installing hole, a first bearing, a second bearing and a shell internally provided with an inner hole, wherein the excircle of the shell is provided with a plurality of heat-radiating fins; the shell is made of a high heat conductivity material, such as an aluminum material; the first bearing, the sealing pair and the second bearing are sequentially arranged in the inner hole of the shell; and the rotating shaft is sequentially embedded into an inner ring of the first bearing, the rotating shaft installing hole of the sealing pair and an inner ring of the second bearing. The plurality of heat-radiating fins are arranged on the excircle of the shell to increase the heated or heat-radiating area of the sealing device, the temperature of magnetic fluid inside the sealing device is kept within a normally-used temperature range, therefore, the thermal insulation type magnetic fluid sealing device has the advantage of keeping the temperature of the magnetic fluid, thereby being capable of preventing overhigh or overlow temperature of the magnetic fluid in the sealing device from influencing the sealing effect.
Description
Technical field
The utility model relates to the Magneticfluid Seal Technique field, in particular, relates to a kind of thermal insulating type device for sealing magnetic fluid.
Background technique
The application of Magneticfluid Seal Technique on sealing technique is one of its most important achievement; Development through decades; Magnet fluid sealing has obtained extensive use in various fields such as national defence, space flight, machinery, electronics, instrument, atomic power, chemical industry, pharmacy, and particularly performance is very outstanding aspect three of dust sealing, vacuum seal and pressure reduction sealings.Like the sealing at important mechanical rotation position, especially the dynamic leakage preventive portion as equipment has outstanding superiority in rotating shaft.Both can reach the leakproof purpose, but the motion of unlikely again influence movable property spare.So the application area of Magneticfluid Seal Technique is more and more wider.
See also shown in Figure 1ly, at present typical magnetic fluid dynamic seal apparatus is generally by a permanent magnet 6 (annulus or cylindrical), two magnetic poles 7 (ring-type disc-shaped permeability magnetic material), rotating shaft 1 (cylindrical permeability magnetic material) and magnetic fluid 8 formation black boies; This black box is installed in the housing 3 (non-magnet material), magnetic shield 5 during installation (ring-type disc-shaped non-magnet material) is used for avoiding bearing to be magnetized in isolated magnetic field again; Bearing 4 is used for guaranteeing rotating shaft 1 rotation, and guarantees the unanimity of seal clearance " δ " shown in the figure; Static seal 0 RunddichtringO 2 is used for guaranteeing leakage from here of gas; 9 pairs of above-mentioned parts of bearing cap carry out axially locating, prevent that above-mentioned part from moving.Since in this device the N-S utmost point of permanent magnet 6 be by axial distribution and two magnetic poles 7 and rotating shaft 1 process by permeability magnetic material; Therefore; Under the action of a magnetic field, shown in the figure Middle Ring Line, formed the magnetic circuit of sealing one by one, this closed magnetic path forms along the interval rotating shaft of N-S surface.From figure, it can also be seen that between two magnetic poles and the rotating shaft it is that gapped " δ " exists; This cross section cylindrical of this gap twisted rotary shaft shape ringwise distributes; These two sections annular gaps are exactly in our the usually said magnetic field magnetic circuit " air gap ", the magnetic intensity in the magnetic air gap of magnetic field is maximum.Magnet fluid sealing has utilized this magnetic phenomenon just; The magnetic fluid 8 that will have ultra paramagnetic characteristic injects therebetween; Under the action of a magnetic field; Magnetic fluid is steadily adsorbed and is full of this two intersegmental crack between rotating shaft (movement parts) and the magnetic pole (static element), has realized the separation to magnetic field two end spaceses, and forms sealing reliably.
The normal serviceability temperature scope of magnetic fluid 8 is between-40 ℃ to 100 ℃, if temperature is lower than-40 ℃, then magnetic fluid 8 can solidify, thereby has increased the running resistance square of seal arrangement, influences sealing effect.If temperature is higher than 100 ℃, then can accelerates the evaporation rate of magnetic fluid 8, thereby influence the working life of magnet fluid sealing.To above-mentioned situation, existing solution is to feed liquid to seal arrangement, heats and lowers the temperature, and the temperature that guarantees Sealing is in the magnetic fluid 8 normal temperature ranges of using.But in some cases, existing solution can't realize.For example,, can't introduce the equipment that injects liquid, perhaps for some equipment, not allow inwardly to feed situation such as liquid owing to receive cost.
Therefore, how to make a kind of seal arrangement that can keep the magnetic fluid temperature, become the problem that needs most solution at present.
The model utility content
In view of this, the purpose of design of the utility model is, a kind of seal arrangement that can keep the magnetic fluid temperature, thus it is low or too high to avoid the magnetic fluid temperature to cross.
The utility model is embodiment be achieved in that
A kind of thermal insulating type device for sealing magnetic fluid comprises: rotating shaft, set inside have sealing pair, clutch shaft bearing, second bearing and the set inside of rotating shaft mounting hole that the housing of endoporus is arranged;
The cylindrical of said housing is provided with a plurality of radiating fin;
Said clutch shaft bearing, said sealing pair and second bearing are successively set in the endoporus of said housing;
Said rotating shaft embeds in the inner ring of rotating shaft mounting hole and second bearing of the inner ring of said clutch shaft bearing, said sealing pair successively.
Preferably, in above-mentioned thermal insulating type device for sealing magnetic fluid, the arranged outside that is positioned at said second bearing in the said rotating shaft has the end cap of fixing said second bearing.
Preferably, in above-mentioned thermal insulating type device for sealing magnetic fluid, also comprise:
Be arranged in the endoporus of said housing and place magnetic shield between said clutch shaft bearing and the sealing pair.
Preferably, in above-mentioned thermal insulating type device for sealing magnetic fluid, also comprise:
Be arranged in the endoporus of said housing and place magnetic shield between said second bearing and the sealing pair.
Preferably, in above-mentioned thermal insulating type device for sealing magnetic fluid, said sealing pair comprises:
Permanent magnet;
Be arranged on the magnetic pole at said permanent magnet two ends;
Be arranged on the magnetic fluid between said two magnetic poles and the said concentrating flux sleeve.
Preferably, in above-mentioned thermal insulating type device for sealing magnetic fluid, be provided with seal ring between the magnetic pole of said sealing pair and the said housing.
Preferably, in above-mentioned thermal insulating type device for sealing magnetic fluid, be radially distributed with a plurality of ring-type radiating fin on the said housing cylindrical uniformly.
Preferably, in above-mentioned thermal insulating type device for sealing magnetic fluid, uniform axial distribution has a plurality of sheet radiating fin on the said housing cylindrical.
Compared with prior art, the technological scheme that provides of the utility model embodiment has the following advantages and characteristics:
The thermal insulating type device for sealing magnetic fluid that the utility model provides through a plurality of radiating fin are set, to increase the area that is heated and dispels the heat of seal arrangement, guarantees that the temperature of inner magnetic fluid remains in the temperature range of normal use on the cylindrical of housing.When the temperature of magnetic fluid was higher than normal temperature, then radiating fin can be fast dissipates the heat of inside, thereby reduced the temperature of inner magnet fluid; When the temperature subnormal temperature of magnetic fluid, then radiating fin can absorb outside heat fast, thereby improves the temperature of inner magnet fluid.Therefore, the utlity model has the advantage that keeps the magnetic fluid temperature, thereby can avoid the too high or too low for temperature and problem that causes of magnetic fluid in the seal arrangement.And then increased the application temperature scope of device for sealing magnetic fluid, solved temperature higher or lower but can not the water flowing cooling or the equipment of heating on use the technological difficulties of Magneticfluid Seal Technique.
Description of drawings
In order to be illustrated more clearly in the utility model or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the existing sectional drawing that feeds the device for sealing magnetic fluid of liquid cooling;
Fig. 2 is the sectional drawing of the device for sealing magnetic fluid that is used for horizontal installation that the utility model provided;
Fig. 3 is the sectional drawing of the device for sealing magnetic fluid that is used for vertical installation that the utility model provided;
Fig. 4 is the sectional drawing along the A-A line of Fig. 3.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technological scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of thermal insulating type device for sealing magnetic fluid, comprising: rotating shaft, set inside have sealing pair, clutch shaft bearing, second bearing and the set inside of rotating shaft mounting hole that the housing of endoporus is arranged; The cylindrical of said housing is provided with a plurality of radiating fin; Said clutch shaft bearing, said sealing pair and second bearing are successively set in the endoporus of said housing; Said rotating shaft embeds in the rotating shaft mounting hole of inner ring of the inner ring of said clutch shaft bearing, said sealing pair and second bearing successively.Because there is multiple mode in the concrete realization of above-mentioned thermal insulating type device for sealing magnetic fluid, is elaborated through specific embodiment below:
See also shown in Figure 2ly, shown in Figure 2 is a kind of thermal insulating type device for sealing magnetic fluid, and the sealing device comprises: rotating shaft 25, set inside have sealing pair 22, clutch shaft bearing 24, second bearing 28 and the set inside of rotating shaft mounting hole that the housing 23 of endoporus is arranged; The cylindrical of said housing 23 is provided with a plurality of radiating fin 21; Said clutch shaft bearing 24, said sealing pair 22 and second bearing 28 are successively set in the endoporus of said housing 23; Said rotating shaft 25 embeds in the inner ring of rotating shaft mounting hole and second bearing 28 of inner ring, said sealing pair 22 of said clutch shaft bearing 24 successively.
In the embodiment shown in Figure 2, through a plurality of radiating fin 21 are set,, guarantee that the temperature of inner magnetic fluid remains in the temperature range of normal use on the cylindrical of housing 23 to increase the area that is heated and dispels the heat of seal arrangement.When the temperature of magnetic fluid was higher than normal temperature, then radiating fin 21 meetings dissipated the heat of inside fast, thereby reduced the temperature of inner magnet fluid; When the temperature subnormal temperature of magnetic fluid, then radiating fin 21 can absorb outside heat fast, thereby improves the temperature of inner magnet fluid.Therefore, the utlity model has the advantage that keeps the magnetic fluid temperature, thereby can avoid the too high or too low for temperature and problem that causes of magnetic fluid in the seal arrangement.And then increased the application temperature scope of device for sealing magnetic fluid, solved temperature higher or lower but can not the water flowing cooling or the equipment of heating on use the technological difficulties of Magneticfluid Seal Technique.
In the embodiment shown in Figure 2, for fear of clutch shaft bearing 28 axial floats, the arranged outside that can in said rotating shaft 25, be positioned at said second bearing 28 has the end cap 29 of fixing said second bearing 28.And; In order to guarantee the sealing effect of seal arrangement; The sealing device can also be provided with two magnetic shields 27; Wherein, in the endoporus that can be arranged on said housing 23 and place between said clutch shaft bearing 24 and the sealing pair 22, another can be arranged in the endoporus of said housing 23 and place between said second bearing 28 and the sealing pair 22.
In the embodiment shown in Figure 2, said sealing pair 22 comprises: permanent magnet; Be arranged on the magnetic pole at said permanent magnet two ends; Be arranged on the magnetic fluid between said two magnetic poles and the said concentrating flux sleeve.Wherein, in order to improve sealing effect, can between the magnetic pole of said sealing pair 22 and said housing 23, seal ring 26 be set.Quantity about above-mentioned magnetic shield 27 and seal ring 26 is decided by the concrete condition of seal arrangement, is not limited to the above-mentioned embodiment who provides at this.
Shown in Figure 2 when laterally installing for seal arrangement, radiating fin 21 residing states promptly are radially distributed with a plurality of ring-type radiating fin 21 uniformly on the cylindrical of said housing 23; Shown in Figure 3 when vertically installing for seal arrangement, radiating fin 21 residing states, on the cylindrical of promptly said housing 23 uniformly axial distribution a plurality of sheet radiating fin 21 are arranged.Adopting various structure about above-mentioned different mounting type, is in order to guarantee that air can flow in radiating fin.See also shown in Figure 2ly, when seal arrangement was laterally installed, then the left and right sides of the seal arrangement of Fig. 2 was fixed by other equipment; So air-flow can only flow through through radiating fin 21; If radiating fin 21 is vertically distributed, then air-flow can't pass through, and can reduce the efficient of heat radiation or heat absorption.Radiating fin 21 principles shown in Figure 3 are identical, so the user need decide the concrete design proposal of radiating fin 21 according to the concrete condition of self, as long as guarantee ventilation effect well.
Wherein, Fig. 4 is the sectional drawing along the A-A line of Fig. 3.
Need to prove that Fig. 2 is the preferred embodiment that the utility model is introduced to embodiment shown in Figure 4, those skilled in the art can design more embodiment on this basis fully, therefore do not give unnecessary details herein.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiments shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. a thermal insulating type device for sealing magnetic fluid is characterized in that, comprising: rotating shaft, set inside have sealing pair, clutch shaft bearing, second bearing and the set inside of rotating shaft mounting hole that the housing of endoporus is arranged;
The cylindrical of said housing is provided with a plurality of radiating fin;
Said clutch shaft bearing, said sealing pair and second bearing are successively set in the endoporus of said housing;
Said rotating shaft embeds in the inner ring of rotating shaft mounting hole and second bearing of the inner ring of said clutch shaft bearing, said sealing pair successively.
2. thermal insulating type device for sealing magnetic fluid according to claim 1 is characterized in that, the arranged outside that is positioned at said second bearing in the said rotating shaft has the end cap of fixing said second bearing.
3. thermal insulating type device for sealing magnetic fluid according to claim 1 is characterized in that, also comprises:
Be arranged in the endoporus of said housing and place magnetic shield between said clutch shaft bearing and the sealing pair.
4. thermal insulating type device for sealing magnetic fluid according to claim 1 is characterized in that, also comprises:
Be arranged in the endoporus of said housing and place magnetic shield between said second bearing and the sealing pair.
5. thermal insulating type device for sealing magnetic fluid according to claim 1 is characterized in that, said sealing pair comprises:
Permanent magnet;
Be arranged on the magnetic pole at said permanent magnet two ends;
Be arranged on the magnetic fluid between said two magnetic poles and the said concentrating flux sleeve.
6. thermal insulating type device for sealing magnetic fluid according to claim 5 is characterized in that, is provided with seal ring between the magnetic pole of said sealing pair and the said housing.
7. thermal insulating type device for sealing magnetic fluid according to claim 1 is characterized in that, is radially distributed with a plurality of ring-type radiating fin on the said housing cylindrical uniformly.
8. thermal insulating type device for sealing magnetic fluid according to claim 1 is characterized in that, uniform axial distribution has a plurality of sheet radiating fin on the said housing cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204437847U CN202301967U (en) | 2011-11-10 | 2011-11-10 | Thermal insulation type magnetic fluid sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204437847U CN202301967U (en) | 2011-11-10 | 2011-11-10 | Thermal insulation type magnetic fluid sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202301967U true CN202301967U (en) | 2012-07-04 |
Family
ID=46370865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204437847U Expired - Lifetime CN202301967U (en) | 2011-11-10 | 2011-11-10 | Thermal insulation type magnetic fluid sealing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202301967U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168290A (en) * | 2016-08-25 | 2016-11-30 | 武汉船用机械有限责任公司 | A kind of mechanically-sealing apparatus |
| CN106286837A (en) * | 2016-09-29 | 2017-01-04 | 武汉船用机械有限责任公司 | A kind of sealing device |
| CN106321853A (en) * | 2016-09-28 | 2017-01-11 | 北京交通大学 | Intelligent thermistor heating type magnetic liquid sealing device |
| CN108808949A (en) * | 2018-07-13 | 2018-11-13 | 苏州启承动能科技有限公司 | A kind of submersible motor |
| WO2019114227A1 (en) * | 2017-12-13 | 2019-06-20 | 广西科技大学 | Arc-shaped stepped magnetic fluid sealing device |
| CN112178202A (en) * | 2020-10-19 | 2021-01-05 | 清华大学 | Magnetic liquid sealing device for sealing dust |
| CN112178201A (en) * | 2020-09-29 | 2021-01-05 | 清华大学 | Magnetic liquid sealing device |
| CN115370750A (en) * | 2022-08-22 | 2022-11-22 | 北京交通大学 | A kind of magnetic fluid seal with magnetic source as three-phase electric winding coil |
-
2011
- 2011-11-10 CN CN2011204437847U patent/CN202301967U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168290A (en) * | 2016-08-25 | 2016-11-30 | 武汉船用机械有限责任公司 | A kind of mechanically-sealing apparatus |
| CN106168290B (en) * | 2016-08-25 | 2019-04-02 | 武汉船用机械有限责任公司 | A kind of mechanically-sealing apparatus |
| CN106321853A (en) * | 2016-09-28 | 2017-01-11 | 北京交通大学 | Intelligent thermistor heating type magnetic liquid sealing device |
| CN106286837A (en) * | 2016-09-29 | 2017-01-04 | 武汉船用机械有限责任公司 | A kind of sealing device |
| WO2019114227A1 (en) * | 2017-12-13 | 2019-06-20 | 广西科技大学 | Arc-shaped stepped magnetic fluid sealing device |
| US10962119B2 (en) | 2017-12-13 | 2021-03-30 | Guangxi university of science and technology | Arc-shaped stepped magnetic fluid sealing device |
| CN108808949A (en) * | 2018-07-13 | 2018-11-13 | 苏州启承动能科技有限公司 | A kind of submersible motor |
| CN112178201A (en) * | 2020-09-29 | 2021-01-05 | 清华大学 | Magnetic liquid sealing device |
| CN112178202A (en) * | 2020-10-19 | 2021-01-05 | 清华大学 | Magnetic liquid sealing device for sealing dust |
| CN115370750A (en) * | 2022-08-22 | 2022-11-22 | 北京交通大学 | A kind of magnetic fluid seal with magnetic source as three-phase electric winding coil |
| CN115370750B (en) * | 2022-08-22 | 2024-11-22 | 北京交通大学 | A magnetic fluid seal with a magnetic source being a three-phase electric winding coil |
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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: 20120704 |
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| CX01 | Expiry of patent term |