CN108087561A - A kind of mixed type magnetic source device for sealing magnetic fluid - Google Patents
A kind of mixed type magnetic source device for sealing magnetic fluid Download PDFInfo
- Publication number
- CN108087561A CN108087561A CN201711326554.0A CN201711326554A CN108087561A CN 108087561 A CN108087561 A CN 108087561A CN 201711326554 A CN201711326554 A CN 201711326554A CN 108087561 A CN108087561 A CN 108087561A
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- CN
- China
- Prior art keywords
- permanent magnet
- sealing
- pole shoe
- pole
- axis
- 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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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a kind of mixed type magnetic source device for sealing magnetic fluid, including axis, shell, pole shoe, magnetic fluid and permanent magnet, axis is extended through to outside the both ends of shell, the inner surface of shell is provided at least two circular pole shoes, cricoid first permanent magnet is provided between two neighboring pole shoe, the inner headed face of pole shoe has the cricoid radial direction pole tooth gone out to crown of roll, axis is provided with cricoid second permanent magnet corresponding to the radial direction pole tooth position place of putting, there is seal clearance between second permanent magnet and radial direction pole tooth, first permanent magnet is axial charging type permanent magnet, second permanent magnet is radial magnetizing type permanent magnet, the magnetic line of force of two adjacent the first permanent magnets is opposite, the magnetic line of force of two adjacent the second permanent magnets is opposite, it is opposite towards the first permanent magnet of same pole shoe and the magnetic pole of the second permanent magnet.The invention enables magnet fluid sealing voltage endurance capabilities to greatly enhance, and overcome thes problems, such as that existing sealing device can not realize high sealing performance requirement under the special operation conditions such as high-speed overload.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, and in particular to one kind can keep excellent sealing under high-speed overload operating mode
The mixed type magnetic source device for sealing magnetic fluid of performance.
Background technology
In device for sealing magnetic fluid, the performance of magnetic fluid can gradually fail with the increase of seal clearance, thus
The voltage endurance capability of sealing device can decline therewith, although current Magneticfluid Seal Technique is applied in major diameter, high-speed overload sealing
Environment in, but it is still current problem to be solved to improve the pressure-resistant performance of magnet fluid sealing under wide arc gap.
One of the method for improving the pressure-resistant performance of wide arc gap magnetic Fluid Sealing be by improving magnetic fluid seal structure,
2 (Publication No. of sealing device and documents as described in documents 1 (patent of Publication No. CN205663888U)
The patent of CN205877200U) described in sealing device.Although two kinds of sealing devices described in document above are relatively common magnetic
Fluid Sealing performance is greatly improved, but the high leakproofness of the special operation conditions such as high-speed overload is still not achieved in its sealing performance
It can requirement.
Magnet fluid sealing is to generate magnetic field force in seal clearance using permanent magnet magnetic fluid is secured firmly between sealing
In gap, the pressure difference of both sides is resisted, so as to achieve the effect that sealing；The object of the present invention is to provide a kind of mixed type magnetic source magnetic fluids
Sealing device, can solve the problems, such as that the pressure-resistant performance of magnet fluid sealing is low so that this sealing technique can be in high-speed overload
Good effect can be played in field.
The content of the invention
The object of the present invention is to provide a kind of mixed type magnetic source device for sealing magnetic fluid, are deposited so as to solve existing sealing device
The relatively low problem of pressure-resistant performance so that the sealing technique is successfully applied in the fields such as high-speed overload.
A kind of mixed type magnetic source device for sealing magnetic fluid, including axis, shell, pole shoe, magnetic fluid and permanent magnet, feature exists
In, the axis is extended through to outside the both ends of shell, and the inner surface of the shell is provided at least two pole shoes, and adjacent two
Cricoid first permanent magnet is provided between a pole shoe, the pole shoe is ring-shaped structure, and the axis is interior through the pole shoe
Hole, the inner headed face of the pole shoe have the cricoid radial direction pole tooth gone out to the crown of roll, and the axis corresponds to radial direction pole tooth
Cricoid second permanent magnet is provided at position, there is seal clearance, institute between second permanent magnet and radial direction pole tooth
It states and the magnetic fluid is equipped in seal clearance, first permanent magnet is axial charging type permanent magnet, and second permanent magnet is
Radial magnetizing type permanent magnet, the magnetic line of force of adjacent two the first permanent magnets is on the contrary, the magnetic force of two adjacent the second permanent magnets
Line is on the contrary, opposite towards the first permanent magnet of same pole shoe and the magnetic pole of the second permanent magnet.
Further, second permanent magnet is arranged in the annular groove of the axis, the outer diameter of second permanent magnet
It is identical with the diameter of axis.
Further, ladder is equipped on the axis between two neighboring second permanent magnet, the diameter of the ladder is more than axis
Diameter, the shaft shoulder that the pole shoe corresponds to the ladder is provided with cricoid axial poles tooth, the axial poles tooth and the shaft shoulder it
Between there is seal clearance, the magnetic fluid is equipped in the seal clearance.
Further, second permanent magnet is the permanent magnet of split-type, is made of equal-sized point of valve of polylith.
Further, sealing ring is provided in the groove on the periphery of the pole shoe, the sealing ring is used to seal pole
Gap between boots periphery and inner surface of outer cover.
Further, two bearings and two magnetism-isolating loops are further included, described two magnetism-isolating loops are respectively provided at the leftmost side
On the left side of pole shoe and the right side of the pole shoe of the rightmost side, two bearings are installed on axis, are respectively provided at left side magnetism-isolating loop
Left side and the right side of right side magnetism-isolating loop, the outer ring of bearing are contacted with the inner surface of shell.
Further, the quantity of first permanent magnet is 2-6, and the quantity of second permanent magnet is than described first
The quantity of permanent magnet is one more.
Further, the size of the seal clearance is 0.05-3mm.
Further, the axial poles tooth, the section of radial direction pole tooth are respectively square or rectangular.
Further, the axial poles tooth of the pole shoe, radial direction pole tooth are set side by side with 2-6 respectively.
The present invention opens up groove and is packed on axis and divide valve by the way that inner headed face and end face on staged pole shoe are opened up pole tooth
Formula permanent magnet, and it is corresponding with the pole tooth on pole shoe, it is injected in the radial and axial seal clearance formed in pole tooth with multi-diameter shaft
Magnetic fluid, so as to fulfill a kind of mixed type magnetic source magnet fluid sealing.The design of the invention in this way can greatly reduce magnetic and return
The length on road increases the magnetic field intensity in seal clearance, while can also reduce the loss amount of magnetic fluid, substantially increases magnetic
The voltage endurance capability and sealing reliability of property Fluid Sealing, expand its range of safety operation.
Description of the drawings
Fig. 1 is the structure diagram of mixed type magnetic source device for sealing magnetic fluid of the present invention.
In figure：Axis 1, shell 2, bearing 3, magnetism-isolating loop 4, end cap 5, pole shoe 6, sealing ring 7, the first permanent magnet 8, the second permanent magnetism
Body 9, ladder 10, radial direction pole tooth 11, axial poles tooth 12, the shaft shoulder 13.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of mixed type magnetic source device for sealing magnetic fluid, including axis 1, shell 2, pole shoe 6, magnetic fluid and first
Permanent magnet 8, the axis 1 are extended through to outside the both ends of shell 2, and the inner surface of the shell 2 is provided at least two poles
Boots 6 are provided with cricoid first permanent magnet 8 between two neighboring pole shoe 6, and the pole shoe is ring-shaped structure, and the axis passes through
The endoporus of pole shoe 6, the inner headed face of the pole shoe 6 have the cricoid radial direction pole tooth 11 protruded to the axis 1, and the axis 1 corresponds to
Cricoid second permanent magnet 9, second permanent magnet 9 and radial direction pole tooth 11 are provided at 11 position of radial direction pole tooth
Between there is seal clearance, the magnetic fluid is equipped in the seal clearance, first permanent magnet 8 is axial charging type permanent magnetism
Body, second permanent magnet 9 are radial magnetizing type permanent magnet, and the magnetic line of force of adjacent two the first permanent magnets 8 is on the contrary, adjacent
The magnetic lines of force of two the second permanent magnets 9 is on the contrary, towards the first permanent magnet 8 of same pole shoe 6 and the magnetic pole phase of the second permanent magnet 9
Instead.Show situation of the tool there are two pole shoe 6 and first permanent magnet 8 in Fig. 1, but 6 and first permanent magnet of pole shoe, 8 equal edge
It and is axially provided with two or more, the first permanent magnet 8 is set between two neighboring pole shoe 6.The material of axis 1 be preferably 2cr13 not
Become rusty steel, and the material of shell 2 is preferably non-magnetic stainless steel, and the material of pole shoe 6 is preferably 2cr13 stainless steels.
Further, ladder 10, the diameter of the ladder 10 are equipped on the axis 1 between two neighboring second permanent magnet 9
More than the diameter of axis 1, the shaft shoulder 13 that the pole shoe 6 corresponds to the ladder 10 is provided with cricoid axial poles tooth 12, the axis
Between pole tooth 12 and the shaft shoulder 13 there is seal clearance, the magnetic fluid is equipped in the seal clearance.The present invention passes through multiple
Pole shoe, multiple permanent magnets form multiple magnet fluid sealing, each pole shoe forms the magnet fluid sealing in two orientation again, greatly
The effect of sealing is enhanced, so that magnet fluid sealing voltage endurance capability greatly enhances.
Further, second permanent magnet 9 is arranged in the annular groove of the axis 1, outside second permanent magnet 9
Footpath is identical with the diameter of axis 1.
Further, second permanent magnet 9 is the permanent magnet of split-type, is made of equal-sized point of valve of polylith,
The pole shoe 6 is the pole shoe of split-type, is made of equal-sized point of valve of polylith.
Further, sealing ring 7 is provided in the groove on the periphery of the pole shoe 6, the sealing ring 7 is used to seal
Gap between 2 inner surface of 6 periphery of pole shoe and shell.
Further, mixed type magnetic source device for sealing magnetic fluid further includes two bearings 3 and two magnetism-isolating loops 4, described
Two magnetism-isolating loops 4 are respectively provided on the left side of the pole shoe 6 of the leftmost side and the right side of the pole shoe 6 of the rightmost side, and two bearings 3 are pacified
Loaded on axis 1, being respectively provided at the left side left side of the magnetism-isolating loop 4 and right side of right side magnetism-isolating loop 4, the outer ring of bearing 3 is interior with shell 2
Surface contacts.
Further, the quantity of first permanent magnet 8 is 2-6, and the quantity of second permanent magnet 9 is than described the
The quantity of one permanent magnet is one more.
Further, the size of the seal clearance is 0.05-3mm.
Further, the axial poles tooth 12, the section of radial direction pole tooth 11 are respectively square or rectangular.
Further, the axial poles tooth 12 of the pole shoe 6, radial direction pole tooth 11 are set side by side with 2-6 respectively.
The mixed type magnetic source device for sealing magnetic fluid of the present invention, installation process are as follows：Sealing ring 7 is mounted on pole shoe 6
In groove on periphery, the second permanent magnet 9 is mounted on axis 1 in annular groove, by multiple 6 and first permanent magnets 8 of pole shoe
Ladder 10 is corresponded respectively on axis 1, the sealing that magnetic fluid injection pole shoe 6 is formed with axis 1, axial poles tooth 12 with the shaft shoulder
In gap, the outside that magnetism-isolating loop 4, bearing 3 are separately mounted to the pole shoe 6 of the left and right sides forms seal assembly, by seal assembly
In shell 2, the outer ring of the bearing 3 in left side is connected to the positioning region of shell 2, and the outer ring of the bearing 3 on right side abuts and end
Lid 5, end cap 5 are threadedly coupled with the inner surface of shell 2, realize a kind of more magnetic source staged magnet fluid sealings.
Finally it should be noted that：In the case where there is no conflict, the feature in the embodiment and embodiment in the present invention can be with
It is mutually combined.For sake of convenience, hereinafter as there are " on ", " under ", "left", "right" printed words, only represent with attached drawing in itself it is upper,
Under, left and right direction it is consistent, not to structure rise restriction effect.In addition, term " first ", " second " are only used for description purpose, and
It is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.It defines as a result,
One or more this feature can be expressed or be implicitly included to the feature of " first ", " second ".In description of the invention
In, " multiple " are meant that two or more, unless otherwise specifically defined.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to foregoing each implementation
Technical solution recorded in example modifies or carries out equivalent substitution to which part technical characteristic；And these modification or
It replaces, the essence of appropriate technical solution is not made to depart from the spirit and scope of various embodiments of the present invention technical solution.
Claims (10)
1. a kind of mixed type magnetic source device for sealing magnetic fluid, including axis, shell, pole shoe, magnetic fluid and permanent magnet, feature exists
In, the axis is extended through to outside the both ends of shell, and the inner surface of the shell is provided at least two pole shoes, and adjacent two
Cricoid first permanent magnet is provided between a pole shoe, the pole shoe is ring-shaped structure, and the axis is interior through the pole shoe
Hole, the inner headed face of the pole shoe have the cricoid radial direction pole tooth gone out to the crown of roll, and the axis corresponds to radial direction pole tooth
Cricoid second permanent magnet is provided at position, there is seal clearance, institute between second permanent magnet and radial direction pole tooth
It states and the magnetic fluid is equipped in seal clearance, first permanent magnet is axial charging type permanent magnet, and second permanent magnet is
Radial magnetizing type permanent magnet, the magnetic line of force of adjacent two the first permanent magnets is on the contrary, the magnetic force of two adjacent the second permanent magnets
Line is on the contrary, opposite towards the first permanent magnet of same pole shoe and the magnetic pole of the second permanent magnet.
2. a kind of mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that adjacent on the axis
Ladder is equipped between two the second permanent magnets, the diameter of the ladder is more than the diameter of axis, and the pole shoe corresponds to the ladder
The shaft shoulder be provided with cricoid axial poles tooth, there is seal clearance, in the seal clearance between the axial poles tooth and the shaft shoulder
Equipped with the magnetic fluid.
A kind of 3. mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that second permanent magnetism
Body is arranged in the annular groove of the axis, and the outer diameter of second permanent magnet is identical with the diameter of axis.
4. a kind of mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that described second is forever
Magnet is the permanent magnet of split-type, is made of equal-sized point of valve of polylith.
5. a kind of mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that outside the pole shoe
Sealing ring is provided in groove on disc, between the sealing ring is for sealing between pole shoe periphery and inner surface of outer cover
Gap.
6. a kind of mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that further include two axis
It holds and is respectively provided at the left side of the pole shoe of the leftmost side and the right side of the pole shoe of the rightmost side with two magnetism-isolating loops, described two magnetism-isolating loops
On end face, two bearings are installed on axis, are respectively provided at the left side left side of the magnetism-isolating loop and right side of right side magnetism-isolating loop, bearing it is outer
Circle is contacted with the inner surface of shell.
A kind of 7. mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that first permanent magnetism
The quantity of body is 2-6, the quantity of second permanent magnet than first permanent magnet quantity more than one.
A kind of 8. mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that the seal clearance
Size be 0.05-3mm.
A kind of 9. mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that the axial poles
Tooth, the section of radial direction pole tooth are respectively square or rectangular.
10. a kind of mixed type magnetic source device for sealing magnetic fluid according to claim 1, which is characterized in that the pole shoe
Axial poles tooth, radial direction pole tooth are set side by side with 2-6 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326554.0A CN108087561B (en) | 2017-12-13 | 2017-12-13 | Mixed type magnetic source magnetic fluid sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326554.0A CN108087561B (en) | 2017-12-13 | 2017-12-13 | Mixed type magnetic source magnetic fluid sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108087561A true CN108087561A (en) | 2018-05-29 |
| CN108087561B CN108087561B (en) | 2020-05-05 |
Family
ID=62175272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711326554.0A Active CN108087561B (en) | 2017-12-13 | 2017-12-13 | Mixed type magnetic source magnetic fluid sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108087561B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799507A (en) * | 2018-09-13 | 2018-11-13 | 广西科技大学 | A kind of more magnetic source socket type device for sealing magnetic fluid |
| CN109027254A (en) * | 2018-09-13 | 2018-12-18 | 广西科技大学 | A kind of embedded tandem type multi-diameter shaft device for sealing magnetic fluid of magnetic source |
| CN109027253A (en) * | 2018-09-13 | 2018-12-18 | 广西科技大学 | A kind of magnetic source alternating expression socket type device for sealing magnetic fluid |
| CN109357018A (en) * | 2018-09-13 | 2019-02-19 | 广西科技大学 | A kind of embedded hybrid type multi-diameter shaft device for sealing magnetic fluid of magnetic source |
| CN110553040A (en) * | 2019-09-08 | 2019-12-10 | 北京化工大学 | spiral magnetic fluid sealing structure for oil-gas two-phase lubricating bearing box |
| CN112728110A (en) * | 2021-01-13 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN112728109A (en) * | 2021-01-13 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device with embedded permanent magnet |
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| SU905562A1 (en) * | 1980-05-23 | 1982-02-15 | Ивановский энергетический институт им.В.И.Ленина | Magnetic liquid seal |
| JPH0415373A (en) * | 1990-05-09 | 1992-01-20 | Toshiba Corp | Operating rotary shaft sealing device for gas insulating type switching equipment |
| JPH04355639A (en) * | 1991-05-30 | 1992-12-09 | Nippon Densan Corp | Spindle motor |
| US7129609B1 (en) * | 2005-08-30 | 2006-10-31 | Ferrolabs, Inc. | Magneto-fluidic seal with wide working temperature range |
| CN105570466A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical ladder type magnetic fluid sealing device |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU905562A1 (en) * | 1980-05-23 | 1982-02-15 | Ивановский энергетический институт им.В.И.Ленина | Magnetic liquid seal |
| JPH0415373A (en) * | 1990-05-09 | 1992-01-20 | Toshiba Corp | Operating rotary shaft sealing device for gas insulating type switching equipment |
| JPH04355639A (en) * | 1991-05-30 | 1992-12-09 | Nippon Densan Corp | Spindle motor |
| US7129609B1 (en) * | 2005-08-30 | 2006-10-31 | Ferrolabs, Inc. | Magneto-fluidic seal with wide working temperature range |
| CN105570466A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical ladder type magnetic fluid sealing device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799507A (en) * | 2018-09-13 | 2018-11-13 | 广西科技大学 | A kind of more magnetic source socket type device for sealing magnetic fluid |
| CN109027254A (en) * | 2018-09-13 | 2018-12-18 | 广西科技大学 | A kind of embedded tandem type multi-diameter shaft device for sealing magnetic fluid of magnetic source |
| CN109027253A (en) * | 2018-09-13 | 2018-12-18 | 广西科技大学 | A kind of magnetic source alternating expression socket type device for sealing magnetic fluid |
| CN109357018A (en) * | 2018-09-13 | 2019-02-19 | 广西科技大学 | A kind of embedded hybrid type multi-diameter shaft device for sealing magnetic fluid of magnetic source |
| CN110553040A (en) * | 2019-09-08 | 2019-12-10 | 北京化工大学 | spiral magnetic fluid sealing structure for oil-gas two-phase lubricating bearing box |
| CN112728110A (en) * | 2021-01-13 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device |
| CN112728109A (en) * | 2021-01-13 | 2021-04-30 | 清华大学 | Magnetic liquid sealing device with embedded permanent magnet |
| CN112728110B (en) * | 2021-01-13 | 2021-12-28 | 清华大学 | Magnetic liquid sealing device |
| CN112728109B (en) * | 2021-01-13 | 2022-05-31 | 清华大学 | Magnetic liquid sealing device with embedded permanent magnet |
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| CN108087561B (en) | 2020-05-05 |
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