CN109595345A - With the magnetic fluid seal device for preventing namagnetic substance anti-contamination function - Google Patents
With the magnetic fluid seal device for preventing namagnetic substance anti-contamination function Download PDFInfo
- Publication number
- CN109595345A CN109595345A CN201910069759.8A CN201910069759A CN109595345A CN 109595345 A CN109595345 A CN 109595345A CN 201910069759 A CN201910069759 A CN 201910069759A CN 109595345 A CN109595345 A CN 109595345A
- Authority
- CN
- China
- Prior art keywords
- pole shoe
- axle sleeve
- pole
- tooth
- magnetic fluid
- 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.)
- Granted
Links
- 239000000126 substance Substances 0.000 title claims abstract description 49
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 45
- 238000011109 contamination Methods 0.000 title claims abstract description 30
- 210000000515 tooth Anatomy 0.000 claims abstract description 132
- 238000007789 sealing Methods 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 230000002093 peripheral effect Effects 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 12
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 5
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 5
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 150000002632 lipids Chemical class 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- -1 silicate lipid Chemical class 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a kind of with the magnetic fluid seal device for preventing namagnetic substance anti-contamination function.The magnetic fluid seal device includes axle housing, shaft, axle sleeve, two bearings, the first pole shoe, the second pole shoe and permanent magnet.Axis room is equipped in axle housing, shaft is rotatably arranged in axis room.Axle sleeve is set in shaft, and two bearings are respectively sleeved on axle sleeve and the inner end of adjacent shaft room is arranged.First pole shoe housing is adsorbed with the magnetic liquid for sealing on axle sleeve between the crest top land of the first pole tooth and the outer peripheral surface of axle sleeve of the first pole shoe.For second pole shoe housing on axle sleeve, the second pole tooth of the second pole shoe includes multiple flat tooths and at least one helical teeth, and the crest top land of helical teeth is formed towards the inclined-plane that the direction far from axle sleeve extends on the direction towards outer end, and permanent magnet is set on axle sleeve.The magnetic fluid seal device of the embodiment of the present invention improves the function of preventing namagnetic substance from polluting.
Description
Technical field
The invention belongs to mechanical engineering sealing techniques, especially suitable for magnetism of the namagnetic substances such as dust under more multi-environment
Hydraulic seal.
Background technique
Magnetic fluid sealing technology due to zero leakage, without mechanical wear, the service life is long, advantages of simple structure and simple gradually by
More and more industries are used.But in use, inevitably to have the namagnetic substances such as dust to enter magnetic liquid close
In seal apparatus, magnetic fluid sealing effect and service life are influenced.It discloses in the prior art a kind of with self-cleaning function
Right pole shoe is placed on the left side of right bearing by magnetic fluid seal device, the device, can be introduced into right axle in the impurity that right side enters
It holds, right bearing is contaminated, and the shape for changing pole shoe cannot prevent impurity from entering magnetic liquid, and not playing prevents magnetic liquid
The purpose of body sealing device pollution.
The technical problem to be solved by the present invention is in existing magnetic fluid seal device, especially dust etc. is non-magnetic
The property more multi-environment lower sealing device used of substance, inevitably has namagnetic substance to enter in magnetic fluid seal device to sealing
Device pollutes, and sealing effect and service life is caused to decline.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention proposes a kind of tool
There is a magnetic fluid seal device for preventing namagnetic substance anti-contamination function, the magnetic fluid seal device has and preferably prevents
The function of namagnetic substance pollution.
It is according to an embodiment of the present invention that there is the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, comprising:
Axle housing, the axle housing is interior to be equipped with axis room, and axis room both ends are respectively inner end and outer end；Shaft, shaft are rotatably arranged at institute
It states in axis room, and the shaft is extend into the inner end of the axis room by the outer end of the axis room；Axle sleeve, the axle sleeve are set in
In the shaft；Two bearings, described two bearings are respectively sleeved on the axle sleeve and the inner end of the neighbouring axis room is arranged；
First pole shoe, the first pole shoe housing on the axle sleeve, first pole shoe be located at described two bearings towards outer end
Side, the internal perisporium of first pole shoe is equipped with multiple first poles tooth, the crest top land of each first pole tooth with it is described
The magnetic liquid for sealing is adsorbed between the outer peripheral surface of axle sleeve；Second pole shoe, the second pole shoe housing is in the axle sleeve
On, second pole shoe is located at the side towards outer end of first pole shoe, and the internal perisporium of second pole shoe is equipped with more
A second pole tooth is adsorbed between the crest top land of at least partly described second pole tooth and the outer peripheral surface of the axle sleeve for sealing
Magnetic liquid, multiple second pole teeth include multiple flat tooths and at least one helical teeth, and the helical teeth is located at the court of the flat tooth
Side outward, the crest top land of the helical teeth are formed towards the direction far from the axle sleeve on the direction towards outer end and prolong
The inclined-plane stretched；Permanent magnet, the permanent magnet are set on the axle sleeve, and be located at first pole shoe and second pole shoe it
Between.
It is according to an embodiment of the present invention have prevent the magnetic fluid seal device of namagnetic substance anti-contamination function, due to the
One pole shoe and the second pole shoe are respectively positioned on the outer end of two bearings, so that preferably avoiding namagnetic substance enters two bearings
The phenomenon that middle appearance pollution bearing, occurs.At the same time, the second pole tooth form positioned at outer end of the second pole shoe becomes helical teeth, helical teeth
Crest top land be formed towards on the direction towards outer end far from axle sleeve direction extend inclined-plane, increase permanent magnet in magnetic
Property liquid in the magnetic field intensity gradient that generates, enhance the function of preventing namagnetic substance from polluting of magnetic sealing means.
In some embodiments, the angle between the crest top land of the helical teeth and the axis of the axle sleeve is a, and a, which meets, to close
It is formula: 5 °≤a≤9 °.
In some embodiments, absorption is magnetic between the crest top land of each flat tooth and the outer peripheral surface of the axle sleeve
Liquid, the helical teeth be it is multiple, positioned at the second pole shoe inner terminal the helical teeth crest top land and the axle sleeve periphery
Magnetic liquid is adsorbed between face, remaining is located between the crest top land of helical teeth and the outer peripheral surface of the axle sleeve of second pole shoe not
Adsorb magnetic liquid.
In some embodiments, described that there is the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, also
It include: two sealing rings, for one of them described sealing ring between first pole shoe and the axle housing, another is described close
Seal is between second pole shoe and the axle housing.
In some embodiments, described that there is the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, also
Including two the first adjustment washers, one of them described the first adjustment washer is between described two bearings, described in another
The first adjustment washer is between first pole shoe and the bearing of adjacent setting.
In some embodiments, the inner end of the axle housing is formed with the first protrusion, one of them described bearing and described the
Second adjustment washer is equipped between one protrusion, the outer end of the axle housing is connected with flange, and the flange, which has, extend into the axis
Second protrusion of room.
In some specific embodiments, described having prevents the magnetic fluid sealing of namagnetic substance anti-contamination function from filling
It sets, further includes third adjusting washer, the third adjusting washer is located between second protrusion and second pole shoe.
In some embodiments, the permanent magnet is made of one of neodymium iron boron, SmCo, iron-cobalt-nickel material.
In some embodiments, the gap between the crest top land of first pole tooth and the outer peripheral surface of the axle sleeve is b1,
The value range of b1 is 0.1mm-0.2mm, and the gap between the crest top land of second pole tooth and the outer peripheral surface of the axle sleeve is
The value range of b2, b2 are 0.1mm-0.2mm.
In some specific embodiments, the width range of first pole tooth is 3 to 5 times of b1, first pole tooth
Altitude range be 20 to 30 times of b1；The width range of second pole tooth is 3 to 5 times of b2, the height of second pole tooth
Spend 20 to 30 times that range is b2.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the overall structure diagram of the magnetic fluid seal device of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram at the first pole shoe of the embodiment of the present invention and the cooperation of shaft.
Fig. 3 is the structural schematic diagram at the second pole shoe of the embodiment of the present invention and the cooperation of shaft.
Fig. 4 is the structural schematic diagram at second pole shoe of another embodiment of the present invention and the cooperation of shaft.
Appended drawing reference:
Magnetic fluid seal device 100,
Axle housing 1, axis room 101, the first protrusion 102, bolt hole 103,
Shaft 2,
Axle sleeve 3,
Bearing 4,
First pole shoe 5, the first pole tooth 501,
Second pole shoe 6, the second pole tooth 601, flat tooth 6011, helical teeth 6012,
Permanent magnet 7,
Sealing ring 8,
The first adjustment washer 9,
Second adjustment washer 10,
Third adjusting washer 11,
Flange 12, the second protrusion 1201,
Magnetic liquid 13.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In addition, limit
There is the feature of " first ", " second " to can explicitly or implicitly include one or more of the features surely.Of the invention
In description, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
The magnetism according to an embodiment of the present invention for having and preventing namagnetic substance anti-contamination function is described below with reference to Fig. 1-Fig. 4
The specific structure of liquid sealing device 100.
As shown in Figure 1, according to the embodiment have the magnetic fluid seal device 100 for preventing namagnetic substance anti-contamination function
It include: axle housing 1, shaft 2,3, two bearings 4 of axle sleeve, the first pole shoe 5, the second pole shoe 6 and permanent magnet 7.
Specifically, being equipped with axis room 101 in axle housing 1,101 both ends of axis room are respectively inner end and outer end.Shaft 2 is rotationally
It is located in axis room 101, and shaft 2 is extend into the inner end of axis room 101 by the outer end of axis room 101.Two bearings 4 are respectively sleeved at
The setting of on the axle sleeve 3 and inner end of adjacent shaft room 101.For first pole shoe, 5 housing on axle sleeve 3, the first pole shoe 5 is located at two bearings 4
The side towards outer end, the internal perisporium of the first pole shoe 5 is equipped with multiple first poles tooth 501, the tooth top of each first pole tooth 501
The magnetic liquid 13 for sealing is adsorbed between face and the outer peripheral surface of axle sleeve 3 (as shown in Fig. 2, the f in Fig. 2 represents axle sleeve 3
Outer peripheral surface).For second pole shoe, 6 housing on axle sleeve 3, the second pole shoe 6 is located at the side towards outer end of the first pole shoe 5, and second
The internal perisporium of pole shoe 6 is equipped with multiple second poles tooth 601, at least partly outer peripheral surface of the crest top land of the second pole tooth 601 and axle sleeve 3
Between be adsorbed with for sealing magnetic liquid 13 (as Figure 3-Figure 4, the f in Fig. 3 and Fig. 4 is the periphery for representing axle sleeve 3
Face), multiple second poles tooth 601 includes multiple flat tooths 6011 and at least one helical teeth 6012, and helical teeth 6012 is located at flat tooth 6011
Towards the side of outer end, the crest top land of helical teeth 6012 is formed towards the direction far from axle sleeve 3 on the direction towards outer end and prolongs
The inclined-plane stretched, permanent magnet 7 are set on axle sleeve 3, and between the first pole shoe 5 and the second pole shoe 6.
It is understood that since the first pole shoe 5 and the second pole shoe 6 are respectively positioned on the side towards outer end of two bearings 4,
The magnetic liquid 13 between magnetic liquid 13 and the second pole tooth 601 and axle sleeve 3 between first pole tooth 501 and axle sleeve 3 is preferable
There is the generation of the phenomenon that pollution bearing 4 to preferably avoid namagnetic substance and enter in two bearings 4 in sealing function.
It should be noted that due to including that at least one is located at the helical teeth 6012 of outer end, and helical teeth in the second pole tooth 601
6012 crest top land is formed towards the inclined-plane that the direction far from axle sleeve 3 extends, the second pole tooth 601 on the direction towards outer end
Shape change so that permanent magnet 7 generates magnetic field intensity gradient in magnetic liquid 13, magnetic liquid 13 is to nonmagnetics
Matter plays the role of magnetic buoyancy outward.The namagnetic substance that sealing device entire in this way enters the external world can generate outward
Power, reach prevent namagnetic substance pollute purpose, improve sealing effect, increase the service life of bearing 4, while more suitable
It is sealed for the magnetic liquid 13 under severe sublimity.
It is according to an embodiment of the present invention that there is the magnetic fluid seal device 100 for preventing namagnetic substance anti-contamination function, by
It is respectively positioned on the outer end of two bearings 4 in the first pole shoe 5 and the second pole shoe 6, is entered to preferably avoid namagnetic substance
The phenomenon that occurring pollution bearing 4 in two bearings 4 occurs.At the same time, the second pole tooth 601 positioned at outer end of the second pole shoe 6
Be formed as helical teeth 6012, the crest top land of helical teeth 6012 is formed towards the direction far from axle sleeve 3 on the direction towards outer end and prolongs
The inclined-plane stretched increases the magnetic field intensity gradient that permanent magnet 7 generates in magnetic liquid 13, enhances the anti-of magnetic sealing means
The only function of namagnetic substance pollution.
Additional description is needed, the type of the middle magnetic liquid 13 of the embodiment of the present invention can be according to sealing gas and temperature
The difference for spending environment, selects the magnetic liquid 13 of different base fluids, be once injected into assembly the first pole shoe 5, the second pole shoe 6 with
In gap between axle sleeve 3.Kerosene or hydrocarbon or two lipid base load liquid are selected in vacuum sealing environment, acidproof resistance to
Fluorocarbon radical carrier fluid is selected under alkali sealed environment.High-quality burning oil or silicate lipid or two lipid bases are selected under low temperature seal environment
Carrier fluid.The magnetic fluid seal device 100 of the embodiment of the present invention can select the type of magnetic liquid according to the actual situation as a result,
To expand the usage range of magnetic fluid seal device 100.
In addition, the material of the first pole shoe 5 and the second pole shoe 6 in the embodiment of the present invention can select electrical pure iron, when
So in other embodiments of the invention, the material of the first pole shoe 5 and the second pole shoe 6 can make a choice according to the actual situation,
It is not limited to electrical pure iron.At the same time, the number of poles series of the first pole tooth 501 and the second pole tooth 601 is according to the pressure difference item of sealing
Part determines that every grade of sealability is 0.5 atmospheric pressure.
In some embodiments, the angle between the crest top land of helical teeth 6012 and the axis of axle sleeve 3 is a, and a meets relationship
Formula: 5 °≤a≤9 °.It is understood that according to the experimental results showed that, when helical teeth 6012 crest top land and axle sleeve 3 axis it
Between angular range between 5 ° -9 °, be more advantageous to and increase the magnetic field intensity gradient that generates in magnetic liquid 13 of permanent magnet 7,
To preferably enhance the sealing effect of magnetic fluid seal device 100.Certainly, in other embodiments of the invention, helical teeth
Angle between 6012 crest top land and the axis of axle sleeve 3 can also make a choice according to actual needs is not limited to above-mentioned model
It encloses.
In some embodiments, as shown in figure 4, being inhaled between the crest top land of each flat tooth 6011 and the outer peripheral surface of axle sleeve 3
With magnetic liquid 13, helical teeth 6012 be it is multiple, positioned at 6 inner terminal of the second pole shoe helical teeth 6012 crest top land and the axle sleeve
Magnetic liquid 13 is adsorbed between 3 outer peripheral surface, remaining is located at the crest top land of the helical teeth 6012 of the second pole shoe 6 and the periphery of axle sleeve 3
Magnetic liquid is not adsorbed between face.What needs to be explained here is that the crest top land of remaining helical teeth 6012 of the second pole shoe 6 and axle sleeve 3
Outer peripheral surface between do not adsorb magnetic liquid 13 and refer to, between the crest top land of remaining helical teeth 6012 and the outer peripheral surface of axle sleeve 3 between
What is filled in gap is air.That is in 100 use process of magnetic fluid seal device, the crest top land of remaining helical teeth 6012
There is the air gap between axle sleeve 3.
In some embodiments, as shown in Figure 1, having the magnetic fluid seal device for preventing namagnetic substance anti-contamination function
100 further include two sealing rings 8, and one of sealing ring 8 is between the first pole shoe 5 and axle housing 1, another sealing ring 8
Between the second pole shoe 6 and axle housing 1.It is understood that having between the first pole shoe 5 and axle housing 1 and the second pole shoe 6 and axle housing 1
There is sealing ring 8, ensure that the sealing between the first pole shoe 5, the second pole shoe 6 and axle housing 1, avoid namagnetic substance from the first pole
The phenomenon that gap between gap or the second pole shoe 6 and axle housing 1 between boots 5 and axle housing 1 enters 101 inner end of axis room generation.
That is, sealing ring 8 is arranged between the first pole shoe 5 and axle housing 1 and the second pole shoe 6 and axle housing 1 can better ensure that magnetic
The sealing effect of property sealing device.
It should be added that sealing ring 8 can be formed as O-ring, certainly since the effect of above-mentioned sealing ring 8 is to protect
The sealing between the first pole shoe 5 and axle housing 1 and the second pole shoe 6 and axle housing 1 is demonstrate,proved, material, shape and the sealing grade of sealing ring 8 can
O-ring is not limited to make a choice according to actual needs.
Advantageously, the seal groove of cooperation sealing ring 8 is respectively provided on the outer peripheral surface of the first pole shoe 5 and the second pole shoe 6.
Sealing ring 8 is avoided as a result, axial float occurs, further ensure the first pole shoe 5 and axle housing 1 and the second pole shoe 6 and axle housing 1
Between sealing effect.
In some embodiments, as shown in Figure 1, having the magnetic fluid seal device for preventing namagnetic substance anti-contamination function
100 further include two the first adjustment washers 9, and one of the first adjustment washer 9 is located between two bearings 4, another first
Adjusting washer 9 is between the first pole shoe 5 and the bearing 4 of adjacent setting.
It is understood that the first adjustment washer 9 being located between two bearings 4 be mainly used for two bearings 4 of adjustment it
Between position, it is ensured that the rotation that axle sleeve 3 can be stable under the support of two bearings 4.And be located at bearing 4 and the first pole shoe 5 it
Between the main function of the first adjustment washer 9 be that magnetic liquid 13 is prevented to be adsorbed between bearing 4 and axle sleeve 3.Specifically, the
One pole shoe 5 is contacted with permanent magnet 7, and bearing 4 is typically all the metal material of magnetic conduction, in order to avoid bearing 4 is by 5 magnetic of the first pole shoe
The phenomenon that changing and making between the magnetic liquid 13 that should be adsorbed between the first pole shoe 5 and axle sleeve 3 absorption bearing 4 and axle sleeve 3
Occur, it is necessary to which the first adjustment washer 9 is set between bearing 4 and the first pole shoe 5.As a result, bearing 4 and the first pole shoe 5 it
Between the first adjustment washer 9 better assure that the sealing effect of magnetic fluid seal device 100.It should be added that
The first adjustment washer 9 can be rubber gasket.Certainly, the shape, material and size of the first adjustment washer 9 can be according to realities
Border needs to make a choice to be not limited to rubber seal 8.
In some embodiments, as shown in Figure 1, the inner end of axle housing 1 is formed with the first protrusion 102, one of bearing 4 with
Second adjustment washer 10 is equipped between first protrusion 102, the outer end of axle housing 1 is connected with flange 12, and flange 12, which has, extend into axis
Second protrusion 1201 of room 101.Two bearings 4, the first pole shoe 5, the second pole shoe 6 and permanent magnet 7 can be limited preferably as a result,
Between first protrusion 102 of system and the second protrusion 1201, two bearings 4, the first pole shoe 5, the second pole shoe 6 and permanent magnet are avoided
7 generation axial floats occur to influence the sealing effect phenomenon of magnetic liquid sealing device.Second adjustment washer 10 can be selected
Rubber seal, certainly, on the one hand the main function of second adjustment washer 10 is to avoid two bearings 4, the first pole shoe 5, second
Axial float occurs for pole shoe 6 and permanent magnet 7, is on the other hand to avoid excessive friction between bearing 4 and the first protrusion 1201.Therefore
Third adjusting washer 11 can make a choice according to actual needs, however it is not limited to rubber seal.
In some specific embodiments, as shown in Figure 1, having prevents the magnetic liquid of namagnetic substance anti-contamination function close
Seal apparatus 100 further includes third adjusting washer 11, and third adjusting washer 11 is located between the second protrusion 1201 and the second pole shoe 6.
Thus, it is possible to which further avoiding two bearings 4, the first pole shoe 5, the second pole shoe 6 and permanent magnet 7 occurs axial float.Third tune
Rubber seal can be selected in whole washer 11, and certainly, the main function of third adjusting washer 11 is to avoid two bearings 4, the first pole
Axial float occurs for boots 5, the second pole shoe 6 and permanent magnet 7, therefore third adjusting washer 11 can make choosing according to actual needs
It selects, however it is not limited to rubber seal.
In some embodiments, permanent magnet 7 is made of one of neodymium iron boron, SmCo, iron-cobalt-nickel material.It is understood that
, permanent magnet 7 selects NdFeB material under room temperature air-proof condition, and temperature permanent magnet 7 at 300 DEG C or less selects SmCo,
Temperature permanent magnet 7 at 400 DEG C selects iron-cobalt-nickel.Different permanent magnets 7 is selected under the conditions of different seal temperatures as a result, is mentioned
The high usage range of the magnetic fluid seal device 100 of the embodiment of the present invention.Furthermore, it is necessary to additional description, replacement is not
Permanent magnet 7 with magnetic field strength can change magnetic liquid 13 to the size of the magnetic buoyancy of namagnetic substance.Therefore, even if permanent magnetism
Body 7 using identical material can also by select have different magnetic field intensity permanent magnet 7 come be better achieved prevent it is non-magnetic
Property substance pollution function.
In some embodiments, the gap between the crest top land of the first pole tooth 501 and the outer peripheral surface of axle sleeve 3 is b1, b1's
Value range is 0.1mm-0.2mm, and the gap between the crest top land of the second pole tooth 601 and the outer peripheral surface of axle sleeve 3 is b2, and b2's takes
Value range is 0.1mm-0.2mm.By experimental verification, when b1 and b2 control is in the range of 0.1mmm-0.2mm, magnetic liquid
Body sealing device 100 can have preferable sealing effect.Certainly, in other embodiments of the invention, b1's and b2 is specific
Value range can make restriction according to actual needs.
In some specific embodiments, the width range of the first pole tooth 501 is 3 to 5 times of b1, the first pole tooth 501
Altitude range is 20 to 30 times of b1.The width range of second pole tooth 601 is 3 to 5 times of b2, the height model of the second pole tooth 601
Enclose is 20 to 30 times of b2.It should be noted that the width of the first pole tooth 501 and height and the second pole tooth 601 height and
Width affects the thickness of the magnetic liquid 13 between the crest top land of the first pole tooth 501 and the outer peripheral surface of axle sleeve 3 to a certain extent
The thickness of magnetic liquid 13 between the outer peripheral surface of the crest top land and axle sleeve 3 of degree and the second pole tooth 601.That is the first pole
The width and height and the height and width of the second pole tooth 601 of tooth 501 will affect the sealing effect of entire magnetic sealing means,
Experiments verify that when the height and width of the first pole tooth 501 and the height and width of the second pole tooth 601 meet above-mentioned value model
When enclosing, magnetic fluid seal device 100 has preferable sealing effect.Certainly, it supplements here it should be noted that in the present invention
Specific embodiment in, the width of the first pole tooth 501 and height and the height and width of the second pole tooth 601 can be according to reality
It needs to adjust and is not limited to above-mentioned value range.In addition, what needs to be explained here is that, although 501 He of above-mentioned first pole tooth
The height of second pole tooth 601 and the value range of width are identical, but in practical practical process, the first pole tooth 501 and second
The height and width of pole tooth 601 can be the same or different.The flat tooth 6011 of second pole tooth 601 and the height of helical teeth 6012 can
With it is identical can not also be identical.
Embodiment:
There is the magnetism for preventing namagnetic substance anti-contamination function below with reference to Fig. 1 description one specific embodiment of the present invention
Liquid sealing device 100.
Having for the present embodiment prevents the magnetic fluid seal device 100 of namagnetic substance anti-contamination function to can be used for radial jump
It moves under little positive seal environment.
There is the present embodiment the magnetic fluid seal device 100 for preventing namagnetic substance anti-contamination function to include axle housing 1, turn
Axis 2,3, two bearings 4 of axle sleeve, the first pole shoe 5, the second pole shoe 6, the first adjustment washer 9 of sealing ring 8, two of permanent magnet 7, two
With a third adjusting washer 11.Axis room 101 is equipped in axle housing 1,101 both ends of axis room are respectively inner end and outer end.Axle housing 1 it is interior
End is formed with the first protrusion 102, and second adjustment washer 10 is equipped between one of bearing 4 and the first protrusion 102, and flange 12 is logical
The outer end that screw is connected to axle housing 1 and axle sleeve 3 is crossed, flange 12 has the second protrusion 1201 for extending into axis room 101.Axle housing 1
Inner face is equipped with multiple bolts hole 103 around the distribution of its axis.Shaft 2 is rotatably arranged in axis room 101, and shaft
2 are extend into the inner end of axis room 101 by the outer end of axis room 101.Two bearings 4 are respectively sleeved on axle sleeve 3 and adjacent shaft room 101
Inner end setting.For first pole shoe, 5 housing on axle sleeve 3, the first pole shoe 5 is located at the side towards outer end of two bearings 4.Such as Fig. 2
It is shown, it is set on the internal perisporium of the first pole shoe 5 there are five the first pole tooth 501, the crest top land of each first pole tooth 501 and axle sleeve 3
The magnetic liquid 13 for sealing is adsorbed between outer peripheral surface.For second pole shoe, 6 housing on axle sleeve 3, the second pole shoe 6 is located at first
The side towards outer end of pole shoe 5.As shown in figure 4, setting on the internal perisporium of the second pole shoe 6, there are five the second pole tooth 601, the second poles
Tooth 601 includes two flat tooths 6011 and three helical teeth 6012, and helical teeth 6012 is located at the side towards outer end of flat tooth 6011, helical teeth
6012 crest top land is formed towards the inclined-plane that the direction far from axle sleeve 3 extends on the direction towards outer end, helical teeth 6012
Angle between crest top land and the axis of axle sleeve 3 is a, and a meets relational expression: 5 °≤a≤9 °.Two flat tooths 6011 and and flat tooth
It is adsorbed with magnetic liquid 13 between the crest top land of 6011 adjacent helical teeth 6012 and the outer peripheral surface of axle sleeve 3, is located at the second pole shoe 6
Outer end the crest top land of two helical teeth 6012 and the outer peripheral surface of axle sleeve 3 between do not adsorb magnetic liquid 13.Permanent magnet 7 is set in
On axle sleeve 3, and between the first pole shoe 5 and the second pole shoe 6.Sealing ring 8, the second pole are equipped between first pole shoe 5 and axle housing 1
Another sealing ring 8 is equipped between boots 6 and axle housing 1.The first adjustment washer 9, the first pole shoe 5 and axis are equipped between two bearings 4
It holds and is equipped with another the first adjustment washer 9 between 4.Third adjusting washer 11 is equipped between second protrusion 1201 and the second pole shoe 6.
In the present embodiment, the gap between the crest top land of the first pole tooth 501 and the outer peripheral surface of axle sleeve 3 is b1, and b1's takes
Value range is 0.1mm-0.2mm, and the gap between the crest top land of the second pole tooth 601 and the outer peripheral surface of axle sleeve 3 is b2, the value of b2
Range is 0.1mm-0.2mm.The width range of first pole tooth 501 is 3 to 5 times of b1, and the altitude range of the first pole tooth 501 is b1
20 to 30 times.The width range of second pole tooth 601 is 3 to 5 times of b2, and the altitude range of the second pole tooth 601 arrives for the 20 of b2
30 times.The permanent magnet 7 of the present embodiment permanent magnet 7 under room temperature air-proof condition selects NdFeB material, and temperature is at 300 DEG C or less
Permanent magnet 7 selects SmCo, and temperature permanent magnet 7 at 400 DEG C selects iron-cobalt-nickel.First pole shoe 5 and the second pole shoe 6 select electrician pure
Iron.The magnetic liquid 13 of the present embodiment selects kerosene or hydrocarbon or two lipid base load liquid in vacuum sealing environment,
Fluorocarbon radical carrier fluid is selected under acid-fast alkali-proof sealed environment.High-quality burning oil or silicate lipid or two are selected under low temperature seal environment
Lipid base load liquid.
The present embodiment has 100 installation steps of magnetic fluid seal device for preventing namagnetic substance anti-contamination function are as follows:
Successively by second adjustment washer 10, bearing 4, the first adjustment washer 9, bearing 4, the first adjustment washer 9, the first pole shoe 5, permanent magnet
7, the second pole shoe 6 is installed together to form seal assembly, injects magnetic liquid 13 to the inner ring surface of the first pole shoe 5, the second pole shoe 6
Afterwards, this seal assembly is placed in the first protrusion 102 of 101 inner end of axis room, third adjusting washer 11 and flange 12 are finally pressed
The shaft 2 for being arranged with axle sleeve 3 is loaded onto according to direction from inside to outside, and the installation of entire magnetic fluid seal device 100 is completed.
The present embodiment has the main beneficial to effect of the magnetic fluid seal device 100 for preventing namagnetic substance anti-contamination function
Fruit are as follows: due to the crest top land and axle sleeve 3 of the second pole tooth 601 axis angular range between 5 ° -9 °, the second pole tooth 601
Shape changes, and external magnetic field generates magnetic field intensity gradient in magnetic liquid 13, and magnetic liquid 13 is oriented to namagnetic substance
The effect of the magnetic buoyancy of outer end.The namagnetic substance that magnetic sealing means entire in this way enter the external world can generate outward
Power, reaching prevents namagnetic substance from polluting purpose, improves sealing effect, increases the service life of bearing 4, while more applicable
Magnetic liquid 13 under severe sublimity seals.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of with the magnetic fluid seal device for preventing namagnetic substance anti-contamination function characterized by comprising
Axle housing, the axle housing is interior to be equipped with axis room, and axis room both ends are respectively inner end and outer end；
Shaft, shaft are rotatably arranged in the axis room, and the shaft extend into the axis by the outer end of the axis room
The inner end of room；
Axle sleeve, the axle sleeve are set in the shaft；
Two bearings, described two bearings are respectively sleeved on the axle sleeve and the inner end of the neighbouring axis room is arranged；
First pole shoe, for the first pole shoe housing on the axle sleeve, first pole shoe is located at the direction of described two bearings
The side of outer end, the internal perisporium of first pole shoe are equipped with multiple first poles tooth, the crest top land of each first pole tooth with
The magnetic liquid for sealing is adsorbed between the outer peripheral surface of the axle sleeve；
Second pole shoe, for the second pole shoe housing in the shaft, second pole shoe is located at the direction of first pole shoe
The internal perisporium of the side of outer end, second pole shoe is equipped with multiple second poles tooth, the tooth top of at least partly described second pole tooth
The magnetic liquid for sealing is adsorbed between face and the outer peripheral surface of the axle sleeve, multiple second pole teeth include multiple flat tooths
With at least one helical teeth, the helical teeth is located at the side towards outer end of the flat tooth, and the crest top land of the helical teeth is outside
The inclined-plane that the direction far from the axle sleeve extends is formed towards on the direction at end；
Permanent magnet, the permanent magnet are set in the shaft, and between first pole shoe and second pole shoe.
2. according to claim 1 have the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, feature
It is, the angle between the crest top land of the helical teeth and the axis of the axle sleeve is a, and a meets relational expression: 5 °≤a≤9 °.
3. according to claim 1 have the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, feature
It is, magnetic liquid is adsorbed between the crest top land of each flat tooth and the outer peripheral surface of the axle sleeve, and the helical teeth is more
It is a, magnetic liquid is adsorbed between the crest top land of the helical teeth of the second pole shoe inner terminal and the outer peripheral surface of the axle sleeve
Body, remaining, which is located between the crest top land of the helical teeth and the outer peripheral surface of the axle sleeve of second pole shoe, does not adsorb magnetic liquid
Body.
4. according to claim 1 have the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, feature
It is, further includes: two sealing rings, one of them described sealing ring are another between first pole shoe and the axle housing
A sealing ring is between second pole shoe and the axle housing.
5. according to claim 1 have the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, feature
It is, further includes two the first adjustment washers, one of them described the first adjustment washer is another between described two bearings
A the first adjustment washer is between first pole shoe and the bearing of adjacent setting.
6. according to claim 1 have the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, feature
It is, the inner end of the axle housing is formed with the first protrusion, and second is equipped between one of them described bearing and first protrusion
Adjusting washer, the outer end of the axle housing are connected with flange, and the flange has the second protrusion for extending into the axis room.
7. according to claim 6 have the magnetic fluid seal device for preventing namagnetic substance anti-contamination function, feature
It is, further includes third adjusting washer, the third adjusting washer is located between second protrusion and second pole shoe.
8. have described in any one of -7 prevents the magnetic fluid sealing of namagnetic substance anti-contamination function from filling according to claim 1
It sets, which is characterized in that the permanent magnet is made of one of neodymium iron boron, SmCo, iron-cobalt-nickel material.
9. have described in any one of -7 prevents the magnetic fluid sealing of namagnetic substance anti-contamination function from filling according to claim 1
It sets, which is characterized in that the gap between the crest top land of first pole tooth and the outer peripheral surface of the axle sleeve is b1, the value model of b1
It encloses for 0.1mm-0.2mm, the gap between the crest top land of second pole tooth and the outer peripheral surface of the axle sleeve is b2, the value of b2
Range is 0.1mm-0.2mm.
10. having the magnetic fluid seal device for preventing namagnetic substance anti-contamination function according to claim 9, feature exists
In the width range of first pole tooth is 3 to 5 times of b1, and the altitude range of first pole tooth is 20 to 30 times of b1；Institute
The width range for stating the second pole tooth is 3 to 5 times of b2, and the altitude range of second pole tooth is 20 to 30 times of b2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069759.8A CN109595345B (en) | 2019-01-24 | 2019-01-24 | Magnetic liquid sealing device with function of preventing non-magnetic substance from pollution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069759.8A CN109595345B (en) | 2019-01-24 | 2019-01-24 | Magnetic liquid sealing device with function of preventing non-magnetic substance from pollution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109595345A true CN109595345A (en) | 2019-04-09 |
| CN109595345B CN109595345B (en) | 2023-12-12 |
Family
ID=65965408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910069759.8A Active CN109595345B (en) | 2019-01-24 | 2019-01-24 | Magnetic liquid sealing device with function of preventing non-magnetic substance from pollution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109595345B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212011A (en) * | 2020-10-30 | 2021-01-12 | 清华大学 | Magnetic liquid sealing device |
| CN112392963A (en) * | 2020-11-11 | 2021-02-23 | 清华大学 | Magnetic liquid sealing device |
| CN112728100A (en) * | 2020-12-28 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN112728111A (en) * | 2021-01-18 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN112728105A (en) * | 2020-12-31 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN113374871A (en) * | 2021-07-14 | 2021-09-10 | 北京交通大学 | Magnetic fluid sealing device with magnetic impurity filtering function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07174241A (en) * | 1993-10-27 | 1995-07-11 | Nok Corp | Magnetic fluid seal |
| CN201027988Y (en) * | 2007-04-29 | 2008-02-27 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN101737499A (en) * | 2010-01-27 | 2010-06-16 | 北京交通大学 | Magnetic liquid sealing device with self-cleaning function |
| CN101776151A (en) * | 2010-03-08 | 2010-07-14 | 北京交通大学 | Reciprocating shaft magnetic liquid sealing structure |
| CN103133700A (en) * | 2013-03-21 | 2013-06-05 | 北京交通大学 | Magnetic liquid rotating and sealing device |
| CN107893854A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of reciprocating motion magnetic fluid sealing structure |
| CN209557666U (en) * | 2019-01-24 | 2019-10-29 | 清华大学 | With the magnetic fluid seal device for preventing namagnetic substance anti-contamination function |
-
2019
- 2019-01-24 CN CN201910069759.8A patent/CN109595345B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07174241A (en) * | 1993-10-27 | 1995-07-11 | Nok Corp | Magnetic fluid seal |
| CN201027988Y (en) * | 2007-04-29 | 2008-02-27 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN101737499A (en) * | 2010-01-27 | 2010-06-16 | 北京交通大学 | Magnetic liquid sealing device with self-cleaning function |
| CN101776151A (en) * | 2010-03-08 | 2010-07-14 | 北京交通大学 | Reciprocating shaft magnetic liquid sealing structure |
| CN103133700A (en) * | 2013-03-21 | 2013-06-05 | 北京交通大学 | Magnetic liquid rotating and sealing device |
| CN107893854A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of reciprocating motion magnetic fluid sealing structure |
| CN209557666U (en) * | 2019-01-24 | 2019-10-29 | 清华大学 | With the magnetic fluid seal device for preventing namagnetic substance anti-contamination function |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212011A (en) * | 2020-10-30 | 2021-01-12 | 清华大学 | Magnetic liquid sealing device |
| CN112392963A (en) * | 2020-11-11 | 2021-02-23 | 清华大学 | Magnetic liquid sealing device |
| CN112392963B (en) * | 2020-11-11 | 2021-07-20 | 清华大学 | Magnetic liquid sealing device |
| CN112728100A (en) * | 2020-12-28 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN112728105A (en) * | 2020-12-31 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN112728105B (en) * | 2020-12-31 | 2022-07-12 | 清华大学 | Magnetic liquid sealing device |
| CN112728111A (en) * | 2021-01-18 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN113374871A (en) * | 2021-07-14 | 2021-09-10 | 北京交通大学 | Magnetic fluid sealing device with magnetic impurity filtering function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109595345B (en) | 2023-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109595345A (en) | With the magnetic fluid seal device for preventing namagnetic substance anti-contamination function | |
| CN209557666U (en) | With the magnetic fluid seal device for preventing namagnetic substance anti-contamination function | |
| CN104948744A (en) | Ultrahigh vacuum magnetic fluid seal transmission device | |
| CN202091519U (en) | Magnetic liquid rotating sealing device | |
| CN103498939B (en) | A kind of seal arrangement improving magnetic fluid sealing voltage endurance capability and sealing reliability | |
| CN111442093A (en) | Wide-temperature applicability magnetic liquid sealing device | |
| CN102182830A (en) | Rotary sealing device for magnetic liquid | |
| CN101776149A (en) | Low-temperature and small-diameter magnetic fluid seal device | |
| CN113090760B (en) | Magnetic liquid sealing device | |
| CN207609778U (en) | A kind of dome camber device for sealing magnetic fluid | |
| CN204805552U (en) | Sealed transmission of magnetic current body for ultrahigh vacuum | |
| CN107882999A (en) | A kind of embedded device for sealing magnetic fluid of magnetic source | |
| CN101737499A (en) | Magnetic liquid sealing device with self-cleaning function | |
| CN105387213A (en) | Magnetic liquid and mechanical seal combined sealing device applied to nuclear reactor main pump seal | |
| CN202301967U (en) | Thermal insulation type magnetic fluid sealing device | |
| CN108087561A (en) | A kind of mixed type magnetic source device for sealing magnetic fluid | |
| CN106015360B (en) | A kind of labyrinth type device for sealing magnetic fluid | |
| CN107830177B (en) | A kind of device for sealing magnetic fluid | |
| CN207333720U (en) | Strip permanent magnet arranged radially magnetic fluid seal device | |
| CN205824190U (en) | A kind of notch cuttype end-surface type magnetic fluid seal device | |
| CN107816553B (en) | A kind of ladder shaft type device for sealing magnetic fluid | |
| CN110219990A (en) | The pump for liquid salts Split mechanical seal of subdivision ring connection INTERFACE MAGNETISM hydraulic seal | |
| CN112963544B (en) | Magnetic liquid sealing device with porous medium material layer | |
| CN106969149B (en) | Magnetic liquid end face labyrinth gland | |
| CN203670796U (en) | Combined sealing device for sealing liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |