CN106015586B - A kind of stepped end-surface type magnetic fluid seal device - Google Patents
A kind of stepped end-surface type magnetic fluid seal device Download PDFInfo
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- CN106015586B CN106015586B CN201610608981.7A CN201610608981A CN106015586B CN 106015586 B CN106015586 B CN 106015586B CN 201610608981 A CN201610608981 A CN 201610608981A CN 106015586 B CN106015586 B CN 106015586B
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- pole shoe
- pole
- annular groove
- ladder
- tooth
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Classifications
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- 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 present invention relates to sealing field of mechanical engineering, specifically related to a kind of stepped end-surface type magnetic fluid seal device, the device includes shell, left pole shoe, middle pole shoe, right pole shoe, permanent magnet, described middle pole shoe is installed on the middle part of axle, and the left and right sides of middle pole shoe is radially symmetrical arranged hierarchic structure；Left pole shoe is installed on the left side of middle pole shoe, and right pole shoe is installed on the right side of middle pole shoe, and the right side of left pole shoe sets pole tooth I and annular groove I, and it is annular groove I that pole tooth I, which corresponds between the ladder side of middle pole shoe left end, pole tooth I,；Pole tooth II and annular groove II are set in the left side of right pole shoe, and it is annular groove II that pole tooth II, which corresponds between the ladder side of middle pole shoe right-hand member, pole tooth II,；Permanent magnet is installed in annular groove I and annular groove II.The sealing device good seal performance of the present invention, can meet the use requirement of the operating mode such as wide arc gap and high speed, heavy duty.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, and in particular to a kind of stepped end-surface type magnetic fluid seal device.
Background technology
Magnetic fluid seal is pressure-resistant, and performance is significantly reduced with the increase of seal clearance.Therefore wide arc gap magnetic flow is improved
Sealedly pressure-resistant performance is one of hot issue of current research to body.Improve the side of the pressure-resistant performance of wide arc gap magnetic Fluid Sealing
One of method is by improving magnetic fluid seal structure.Existing magnetic fluid seal device by setting labyrinth seal structure,
The sealing property of more traditional sealing structure is greatly improved, but due to setting axial seal ring, rotating shaft is in rotation process
Influence of the circular runout of middle generation to sealing property is larger；Further, since sealing structure sets the defect existed, cause sealing
The leakage rate of magnetic fluid is big during failure, and pressure-resistant performance is relatively low, it is impossible to meet the requirement of the operating mode such as wide arc gap and high speed.
The content of the invention
Present invention seek to address that existing sealing device can not realize high sealing performance at a high speed or under the operating mode such as wide arc gap will
Ask that there is provided a kind of stepped end-surface type magnetic fluid seal device.
Technical scheme is as follows：A kind of stepped end-surface type magnetic fluid seal device, including shell, Zuo Ji
Boots, middle pole shoe, right pole shoe, permanent magnet, described middle pole shoe are installed on the middle part of axle, the left side of middle pole shoe and right-hand member
Face is hierarchic structure, and the ladder of left side and right side is respectively along journal axle to setting；Described left pole shoe is installed on centre
The left side of pole shoe, right pole shoe is installed on the right side of middle pole shoe；
Pole tooth I and annular groove I, described pole tooth I and a left side for middle pole shoe are set on the right side of described left pole shoe
The step number of end face is equal, and annular groove I is set between adjacent pole tooth I；Described pole tooth I distinguishes along the axially arranged of axle
Extended sideways to each ladder of the left side of middle pole shoe, between each pole tooth I right side and the side of each ladder
Gap is left, the tooth I right side injection magnetic fluid in pole, under the action of a magnetic force, magnetic fluid is adsorbed in the right side of pole tooth
On end face, the height of described pole tooth I on Axial and radial is less than the height of the side of its corresponding ladder；Described annular groove
Permanent magnet is set in I；
Pole tooth II and annular groove II, described pole tooth II and middle pole shoe are set on the left side of described right pole shoe
The step number of right side is equal, and annular groove II is set between adjacent pole tooth II；Described pole tooth II along the axially arranged of axle,
Extended sideways respectively to each ladder of the right side of middle pole shoe, each pole tooth II left side and the side of each ladder
Between leave gap, in pole tooth II left side injection magnetic fluid, under the action of a magnetic force, magnetic fluid is adsorbed in pole tooth
On II left side, the height of described pole tooth II on Axial and radial is less than the height of the side of its corresponding ladder；Described
Permanent magnet is set in annular groove II.
Described each annular groove I axial depths are different, and each annular groove I axial depth is in axle toward the side of shell
Progressively shoal upwards, and the axle of any ladder of the difference equal to middle pole shoe left end of two neighboring annular groove I axial depths
To length；Described each annular groove II axial depths are different, and each annular groove II axial depth is in axle toward shell
Progressively shoaled on direction, and any ladder of the difference equal to middle pole shoe right-hand member of two neighboring annular groove II axial depths
Axial length.
The left side of described middle pole shoe is corresponding mutually in mirror image with the hierarchic structure of right side, and the axle of each ladder
To equal length.
Sealing device of the present invention also includes jump ring, magnetism-isolating loop, bearing, and described jump ring is installed on axle, is located at
The left and right sides of middle pole shoe；Magnetism-isolating loop and bearing are installed in the left side of left pole shoe and the right side of right pole shoe successively respectively.
Described magnetism-isolating loop includes outer magnetism-isolating loop and interior magnetism-isolating loop, and outer magnetism-isolating loop is installed on the inwall of shell, interior magnetism-isolating loop
It is installed on axle, there is the axle in gap, outer magnetism-isolating loop and interior magnetism-isolating loop between the outer wall of the inwall of outer magnetism-isolating loop and interior magnetism-isolating loop
To equal length.
Described permanent magnet is the opposite polarity of two adjacent permanent magnets on radial magnetizing type permanent magnet, left pole shoe, right pole
The opposite polarity of two adjacent permanent magnets on boots.
The ladder quantity of described middle pole shoe left and right ends is respectively 2-7, and ladder height is 1-5mm.
On described left pole shoe on pole tooth I and right pole shoe on pole tooth II end face and middle pole shoe between the side of ladder
Distance is 0.1-5mm.
Annular groove III is set respectively on left pole shoe and right pole shoe outer ring surface, for installing rubber seal.
The installation process of sealing device of the present invention is as follows：Middle pole shoe is installed on to the middle part of axle；By rubber ring
In the annular groove III for being respectively installed to left pole shoe and right pole shoe outer ring surface, permanent magnetism is installed in the annular groove I of left pole shoe
Body, makes the permanent magnet polarity in each annular groove I on the contrary, installing permanent magnet in the annular groove II of right pole shoe, makes annular recessed
Permanent magnet polarity in groove II is opposite；Magnetic fluid is injected separately into pole tooth I and pole tooth II end face；In the left side of middle pole shoe
Jump ring, left pole shoe, magnetism-isolating loop, bearing are installed successively, jump ring, right pole shoe, magnetism-isolating loop, axle are installed successively on the right side of middle pole shoe
Hold；Shell is installed on axle, jacket is lived in the part stated and be installed on axle, the inwall of shell left end is close to positioned at left side
Bearing, end cap passes through the outer ring that compression is located at the bearing on right side that is threadedly coupled with shell right-hand member.
Stepped end-surface type magnetic fluid seal device of the present invention, the left and right ends of middle pole shoe are symmetrical arranged footpath
To hierarchic structure, set on left pole shoe and right pole shoe with the corresponding pole tooth of ladder on the pole shoe of centre, between the tooth of pole
Annular groove is in hierarchic structure, makes middle pole shoe and left pole shoe and the stepped sealing structure of right pole shoe formation radial direction, rank
Ladder type sealing structure has good poly- magnetic property, so that the voltage endurance capability of sealing structure is enhanced, magnetic when reducing seal failure
The loss of property fluid；In addition, the stepped sealing structure of radial direction makes seal clearance not influenceed by rotating shaft circular runout, in centre
The left and right sides of pole shoe sets jump ring, coordinates the effect of shell and end cap to realize the axially position of sealing structure, is conducive to protecting
The fluctuation of seal clearance is demonstrate,proved in reliable scope, makes the sealing property of sealing device reliable and stable；Due to reasonable in design,
In rotating machinery of the sealing device of the present invention for requiring the special operation conditions such as wide arc gap, its voltage endurance capability, which is met, to be required,
So as to expand range of safety operation.
Brief description of the drawings
Fig. 1 is the structural representation of sealing device of the present invention
Each sequence number sign and corresponding title are as follows in figure：Magnetism-isolating loop in 1- axles, 2- shells, 3- bearings, 4-, 5- is outer every magnetic
Pole shoe in the middle of ring, the left pole shoes of 6-, 61- poles tooth I, 62- annular grooves I, 7- permanent magnet, 8-, the right pole shoes of 9-, 91- poles tooth II, 92-
Annular groove II, 10- jump ring, 11- end caps, 12- annular grooves III.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
A kind of stepped end-surface type magnetic fluid seal device as shown in Figure 1, including shell 2, left pole shoe 6, dynode
Boots 8, right pole shoe 9, permanent magnet 7, described middle pole shoe 8 are installed on the middle part of axle 1, the left side and right side of middle pole shoe 8
It is hierarchic structure, the ladder of left side and right side being radially arranged along axle 1 respectively；Described left pole shoe 6 is installed on centre
The left side of pole shoe 8, right pole shoe 9 is installed on the right side of middle pole shoe 8；
Pole tooth I61 and annular groove I62, described pole tooth I61 and dynode are set on the right side of described left pole shoe 6
The step number of the left side of boots 8 is equal, and annular groove I62 is set between adjacent pole tooth I61；Described pole tooth I61 is along axle 1
It is axially arranged, extended sideways respectively to each ladder of the left side of middle pole shoe 8, each pole tooth I61 right side with it is each
Leave gap between the side of individual ladder, the height of described pole tooth I61 in axle 1 radially is less than the side of its corresponding ladder
Height；Permanent magnet 7 is set in described annular groove I62；
Pole tooth II91 and annular groove II92 are set on the left side of described right pole shoe 9, and described pole tooth II91 is with
Between pole shoe 8 right side step number it is equal, annular groove II92 is set between adjacent pole tooth II91；Described pole tooth II91
Along the axially arranged of axle 1, extended sideways respectively to each ladder of the right side of middle pole shoe 8, each a pole tooth II91 left side
Leave gap between end face and the side of each ladder, it is corresponding that the height of described pole tooth II91 in axle 1 radially is less than its
The height of the side of ladder；Permanent magnet 7 is set in described annular groove II92.
Described each annular groove I62 axial depths are different, each annular groove I62 axial depth in axle 1 outward
Progressively shoaled on the direction of shell 2, and the difference of two neighboring annular groove I62 axial depths is equal to appointing for the middle left end of pole shoe 8
The axial length of one ladder；Described each annular groove II92 axial depths are different, and each annular groove II92's is axially deep
Degree is in axle 1 toward progressively shoaling on the direction of shell 2, and the difference of two neighboring annular groove II92 axial depths is equal to dynode
The axial length of any ladder of the right-hand member of boots 8.
The left side of described middle pole shoe 8 is corresponding mutually in mirror image with the hierarchic structure of right side, and each ladder
Axial length is equal.
Sealing device of the present invention also includes jump ring 10, magnetism-isolating loop, bearing 3, and described jump ring 10 is installed on axle 1
On, positioned at the left and right sides of middle pole shoe 8；Magnetism-isolating loop and axle are installed in the left side of left pole shoe 6 and the right side of right pole shoe 9 successively respectively
Hold 3.
Described magnetism-isolating loop includes outer magnetism-isolating loop 5 and interior magnetism-isolating loop 4, and outer magnetism-isolating loop 5 is installed on the inwall of shell 2, it is interior every
Magnet ring 4 is installed on axle 1, there is gap between the inwall of outer magnetism-isolating loop 5 and the outer wall of interior magnetism-isolating loop 4, outer magnetism-isolating loop 5 and it is interior every
The axial length of magnet ring 4 is equal.
Described permanent magnet 7 is the opposite polarity of two adjacent permanent magnets 7 on radial magnetizing type permanent magnet, left pole shoe 6, right
The opposite polarity of two adjacent permanent magnets 7 on pole shoe 9.
The ladder quantity of the described left and right ends of middle pole shoe 8 is respectively 2-7, and ladder height is 1-5mm.
On described left pole shoe 6 on pole tooth I61 and right pole shoe 9 pole tooth II91 end face and ladder on middle pole shoe 8 side
The distance between face is 0.1-5mm.
Annular groove III12 is set respectively on left pole shoe 6 and the outer ring surface of right pole shoe 9, for installing rubber seal.
The installation process of sealing device of the present invention is as follows：Middle pole shoe 8 is installed on to the middle part of axle 1；By rubber
Circle is respectively installed in the annular groove III12 of left pole shoe 6 and the outer ring surface of right pole shoe 9, in the annular groove I62 of left pole shoe 6
Permanent magnet 7 is installed, makes the opposite polarity of permanent magnet 7 in each annular groove I62, is installed in the annular groove II92 of right pole shoe 9
Permanent magnet 7, makes the opposite polarity of permanent magnet 7 in annular groove II92；Magnetic fluid is injected separately into pole tooth I61 and pole tooth II91
End face；Jump ring 10, left pole shoe 6, magnetism-isolating loop, bearing 3 are installed successively in the left side of middle pole shoe 8, on the right side of middle pole shoe 8
Jump ring 10, right pole shoe 9, magnetism-isolating loop, bearing 3 are installed successively；Shell 2 is installed on axle 1, shell 2 is covered and above-mentioned is installed on axle 1
On part, the inwall of the left end of shell 2 is close to the bearing 3 positioned at left side, and end cap 11 passes through the threaded connection pressure with the right-hand member of shell 2
The outer ring of the tight bearing 3 positioned at right side.
Claims (10)
1. a kind of stepped end-surface type magnetic fluid seal device, including shell（2）, left pole shoe（6）, permanent magnet（7）, dynode
Boots（8）, right pole shoe（9）, it is characterised in that：Described middle pole shoe（8）It is installed on axle（1）Middle part, middle pole shoe（8）A left side
End face and right side are hierarchic structure, and the ladder of left side and right side is respectively along axle（1）Be radially arranged；Described left pole
Boots（6）It is installed on middle pole shoe（8）Left side, right pole shoe（9）It is installed on middle pole shoe（8）Right side；
Described left pole shoe（6）Right side on set pole tooth I（61）With annular groove I（62）, described pole tooth I（61）With in
Between pole shoe（8）Left side equal, the adjacent pole tooth I of step number（61）Between annular groove I is set（62）；Described pole tooth
I（61）Along axle（1）It is axially arranged, respectively to middle pole shoe（8）Each ladder of left side extend sideways, each pole tooth
I（61）Right side and each ladder side between leave gap, described pole tooth I（61）In axle（1）Height radially
The height of the side of ladder corresponding less than its；Described annular groove I（62）Middle setting permanent magnet（7）；
Described right pole shoe（9）Left side on set pole tooth II（91）With annular groove II（92）, described pole tooth II（91）
With middle pole shoe（8）Right side equal, the adjacent pole tooth II of step number（91）Between annular groove II is set（92）；It is described
Pole tooth II（91）Along axle（1）It is axially arranged, respectively to middle pole shoe（8）Each ladder of right side extend sideways,
Each pole tooth II（91）Left side and each ladder side between leave gap, described pole tooth II（91）In axle（1）Footpath
Upward height is less than the height of the side of its corresponding ladder；Described annular groove II（92）Middle setting permanent magnet（7）.
2. step type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Each described annular
Groove I（62）Axial depth is different, each annular groove I（62）Axial depth in axle（1）Toward shell（2）Direction on progressively
Shoal, and two neighboring annular groove I（62）The difference of axial depth is equal to middle pole shoe（8）The axial direction of any ladder of left end
Length；Described each annular groove II（92）Axial depth is different, each annular groove II（92）Axial depth in axle（1）
Toward shell（2）Direction on progressively shoal, and two neighboring annular groove II（92）The difference of axial depth is equal to middle pole shoe
（8）The axial length of any ladder of right-hand member.
3. step type end-surface type magnetic fluid seal device as claimed in claim 1 or 2, it is characterised in that：Described centre
Pole shoe（8）Left side and right side hierarchic structure mutually in mirror image it is corresponding, and each ladder axial length it is equal.
4. step type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Also include jump ring
（10）, described jump ring（10）It is installed on axle（1）On, positioned at middle pole shoe（8）The left and right sides.
5. step type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Also include magnetism-isolating loop,
Bearing（3）, left pole shoe（6）Left side and right pole shoe（9）Right side magnetism-isolating loop and bearing are installed successively respectively（3）.
6. step type end-surface type magnetic fluid seal device as claimed in claim 5, it is characterised in that：Described magnetism-isolating loop bag
Include outer magnetism-isolating loop（5）With interior magnetism-isolating loop（4）, outer magnetism-isolating loop（5）It is installed on shell（2）Inwall, interior magnetism-isolating loop（4）It is installed on axle
（1）On, outer magnetism-isolating loop（5）Inwall and interior magnetism-isolating loop（4）Outer wall between there is gap, outer magnetism-isolating loop（5）With interior magnetism-isolating loop
（4）Axial length it is equal.
7. step type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Described permanent magnet
（7）For radial magnetizing type permanent magnet, left pole shoe（6）Upper two adjacent permanent magnets（7）Opposite polarity, right pole shoe（9）It is upper adjacent
Two permanent magnets（7）Opposite polarity.
8. step type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Described middle pole shoe
（8）The ladder quantity of left and right ends is respectively 2-7, and ladder height is 1-5mm.
9. step type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that：Described left pole shoe
（6）Upper pole tooth I（61）With right pole shoe（9）Upper pole tooth II（91）End face and middle pole shoe（8）Between the side of upper ladder away from
From being 0.1-5mm.
10. step type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that：In left pole shoe（6）With
Right pole shoe（9）Annular groove III is set respectively on outer ring surface（12）, for installing rubber seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608981.7A CN106015586B (en) | 2016-07-29 | 2016-07-29 | A kind of stepped end-surface type magnetic fluid seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608981.7A CN106015586B (en) | 2016-07-29 | 2016-07-29 | A kind of stepped end-surface type magnetic fluid seal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106015586A CN106015586A (en) | 2016-10-12 |
| CN106015586B true CN106015586B (en) | 2017-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610608981.7A Active CN106015586B (en) | 2016-07-29 | 2016-07-29 | A kind of stepped end-surface type magnetic fluid seal device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620799B (en) * | 2017-10-30 | 2023-05-05 | 广西科技大学 | Magnetic fluid sealing device for high vacuum |
| CN108061163B (en) * | 2017-12-13 | 2019-06-25 | 广西科技大学 | A kind of staged device for sealing magnetic fluid |
| CN107956882B (en) * | 2017-12-13 | 2023-05-05 | 广西科技大学 | Multistage disc magnetic fluid sealing device |
| CN107816553B (en) * | 2017-12-13 | 2019-06-28 | 广西科技大学 | A kind of ladder shaft type device for sealing magnetic fluid |
| CN108006233B (en) * | 2017-12-14 | 2020-07-10 | 广西科技大学 | Sleeve type magnetic fluid sealing device with trapezoidal pole shoes |
| CN111457100B (en) * | 2020-04-24 | 2021-02-19 | 中国矿业大学 | Axial and radial combined type magnetic liquid sealing structure |
| CN114251369A (en) * | 2021-11-25 | 2022-03-29 | 广西科技大学 | Magnetic fluid sealing device for bearing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07174239A (en) * | 1993-12-21 | 1995-07-11 | Seiko Seiki Co Ltd | Seal structure |
| US6857635B1 (en) * | 2001-10-18 | 2005-02-22 | Ferrotec (Usa) Corporation | Ultra high vacuum ferrofluidic seals and method of manufacture |
| CN1271358C (en) * | 2003-12-10 | 2006-08-23 | 北京交通大学 | Sealing device with uniformly distributed magnetic liquid |
| PL221563B1 (en) * | 2011-12-08 | 2016-04-29 | Akademia Górniczo Hutnicza Im Stanisława Staszica W Krakowie | Multistage sealing using a magnetic fluid |
| CN103133700B (en) * | 2013-03-21 | 2015-09-30 | 北京交通大学 | A kind of magnetic liquid rotating sealing device |
| CN103925371B (en) * | 2014-04-29 | 2015-07-22 | 北京交通大学 | Peltier cooling type magnetic liquid sealing device |
| CN205824190U (en) * | 2016-07-29 | 2016-12-21 | 广西科技大学 | A kind of notch cuttype end-surface type magnetic fluid seal device |
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2016
- 2016-07-29 CN CN201610608981.7A patent/CN106015586B/en active Active
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