CN205824190U - A kind of notch cuttype end-surface type magnetic fluid seal device - Google Patents
A kind of notch cuttype end-surface type magnetic fluid seal device Download PDFInfo
- Publication number
- CN205824190U CN205824190U CN201620810452.0U CN201620810452U CN205824190U CN 205824190 U CN205824190 U CN 205824190U CN 201620810452 U CN201620810452 U CN 201620810452U CN 205824190 U CN205824190 U CN 205824190U
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- pole shoe
- pole
- annular groove
- ladder
- tooth
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Abstract
This utility model relates to sealing field of mechanical engineering, it is specifically related to a kind of notch cuttype end-surface type magnetic fluid seal device, this 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 arranges pole tooth I and annular groove I, the pole tooth I ladder side corresponding to middle pole shoe left end, is annular groove I between the tooth I of pole；Pole tooth II and annular groove II, the pole tooth II ladder side corresponding to middle pole shoe right-hand member is set in the left side of right pole shoe, is annular groove II between the tooth II of pole；Permanent magnet is installed in annular groove I and annular groove II.Sealing device good seal performance of the present utility model, can meet wide arc gap and the use requirement of the operating mode such as high speed, heavy duty.
Description
Technical field
This utility model belongs to sealing field of mechanical engineering, is specifically related to a kind of notch cuttype end-surface type magnetic fluid seal dress
Put.
Background technology
Magnetic fluid seal is pressure, and performance significantly reduces along with the increase of seal clearance.Therefore wide arc gap magnetic flow is improved
The pressure performance that body seals is one of hot issue of current research.Improve the side of the wide arc gap pressure performance of magnetic fluid-tight
One of method is by improving magnetic fluid seal structure.Existing magnetic fluid seal device by arranging labyrinth seal structure,
The sealing property of more traditional sealing structure is greatly improved, but owing to arranging axial seal ring, rotating shaft is at rotation process
The circular runout of middle generation is bigger on the impact of sealing property；Further, since seal structure to arrange the defect of existence, cause sealing
During inefficacy, the leakage rate of magnetic fluid is big, and pressure performance is relatively low, it is impossible to meet the requirement of the operating mode such as wide arc gap and high speed.
Summary of the invention
This utility model aims to solve the problem that existing sealing device cannot realize high sealing performance under the operating modes such as high speed or wide arc gap
Requirement, it is provided that a kind of notch cuttype end-surface type magnetic fluid seal device.
The technical solution of the utility model is as follows: a kind of notch cuttype end-surface type magnetic fluid seal device, including shell, a left side
Pole shoe, middle pole shoe, right pole shoe, permanent magnet, described middle pole shoe is installed on the middle part of axle, the left side of middle pole shoe and the right side
End face be the ladder of hierarchic structure, left side and right side respectively along journal axle to setting；During described left pole shoe is installed on
Between the left side of pole shoe, right pole shoe is installed on the right side of middle pole shoe；
A left side of pole tooth I and annular groove I, described pole tooth I and middle pole shoe is set on the right side of described left pole shoe
The step number of end face is equal, arranges annular groove I between adjacent pole tooth I；Axially arranged along axle of described pole tooth I, respectively
Extend, between right side and the side of each ladder of each pole tooth I to the side of each ladder of the left side of middle pole shoe
Leaving gap, inject magnetic fluid in the right side of pole tooth I, under the action of a magnetic force, magnetic fluid is adsorbed in the right side of pole tooth
On end face, described pole tooth I height on Axial and radial is less than the height of the side of the ladder of its correspondence；Described annular groove
I arranges permanent magnet；
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, arranges annular groove II between adjacent pole tooth II；Axially arranged along axle of described pole tooth II,
Side to each ladder of the right side of middle pole shoe extends respectively, the left side of each pole tooth II and the side of each ladder
Between leave gap, the left side of pole tooth II inject magnetic fluid, under the action of a magnetic force, magnetic fluid is adsorbed in pole tooth
On the left side of II, described pole tooth II height on Axial and radial is less than the height of the side of the ladder of its correspondence；Described
Annular groove II arranges permanent magnet.
Described each annular groove I axial depth is different, the axial depth of each annular groove I at axle toward the side of shell
The most progressively shoal, and the difference of adjacent two annular groove I axial depth is equal to the axle of arbitrary ladder of middle pole shoe left end
To length；Described each annular groove II axial depth is different, the axial depth of each annular groove II at axle toward shell
Progressively shoal on direction, and the difference of adjacent two annular groove II axial depth is equal to arbitrary ladder of middle pole shoe right-hand member
Axial length.
The left side of described middle pole shoe is mutually corresponding in mirror image with the hierarchic structure of right side, and the axle of each ladder
Equal to length.
Sealing device described in the utility model also includes that jump ring, magnetism-isolating loop, bearing, described jump ring are installed on axle,
It is positioned at the left and right sides of middle pole shoe；The left side of left pole shoe and the right side of right pole shoe install magnetism-isolating loop and bearing the most successively.
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, between inwall and the outer wall of interior magnetism-isolating loop of outer magnetism-isolating loop, there is gap, outer magnetism-isolating loop and the axle of interior magnetism-isolating loop
Equal to length.
Described permanent magnet is radial magnetizing type permanent magnet, the opposite polarity of two adjacent permanent magnets on left pole shoe, right pole
The opposite polarity of two adjacent permanent magnets on boots.
The ladder quantity at described two ends, middle pole shoe left and right is respectively 2-7, and ladder height is 1-5mm.
On described left pole shoe on pole tooth I and right pole shoe pole tooth II end face and on middle pole shoe between the side of ladder
Distance is 0.1-5mm.
Left pole shoe and right pole shoe outer ring surface are respectively provided with annular groove III, are used for rubber seal is installed.
The installation process of sealing device described in the utility model is as follows: middle pole shoe is installed on the middle part of axle；By rubber
Cushion rubber is respectively installed in the annular groove III of left pole shoe and right pole shoe outer ring surface, installs forever in the annular groove I of left pole shoe
Magnet, makes the permanent magnet polarity in each annular groove I contrary, installs permanent magnet, make annular in the annular groove II of right pole shoe
Permanent magnet polarity in groove II is contrary；Magnetic fluid is injected separately into pole tooth I and the end face of pole tooth II；A left side at middle pole shoe
Side installs jump ring, left pole shoe, magnetism-isolating loop, bearing successively, install successively on the right side of middle pole shoe jump ring, right pole shoe, magnetism-isolating loop,
Bearing；Installing shell on axle, make jacket live in state the part being installed on axle, the inwall of shell left end is close to be positioned at left side
Bearing, end cap is positioned at the outer ring of bearing on right side by the compression of threadeding with shell right-hand member.
Notch cuttype end-surface type magnetic fluid seal device described in the utility model, two ends, the left and right symmetry of middle pole shoe sets
Put hierarchic structure radially, left pole shoe with right pole shoe arrange the pole tooth corresponding with the ladder on the pole shoe of centre, pole tooth it
Between annular groove be in hierarchic structure, make middle pole shoe form notch cuttype radially with left pole shoe and right pole shoe and seal knot
Structure, notch cuttype seals structure and has good poly-magnetic property, thus enhance the voltage endurance capability sealing structure, reduces seal failure
Time magnetic fluid loss；Seal clearance is made not affected by rotating shaft circular runout it addition, notch cuttype radially seals structure,
The left and right sides of middle pole shoe arranges jump ring, coordinate shell and end cap effect realize sealing the axial location of structure, favorably
In ensure the fluctuation of seal clearance in the range of reliably, the sealing property making sealing device is reliable and stable；Owing to structure designs
Rationally, sealing device described in the utility model for requiring in the rotating machinery of the special operation conditions such as wide arc gap, its voltage endurance capability
Meet requirement, thus expand range of safety operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of sealing device described in the utility model
In figure, each sequence number indicates and the title of correspondence is as follows: 1-axle, 2-shell, 3-bearing, magnetism-isolating loop in 4-, and 5-is outer every magnetic
Ring, the left pole shoe of 6-, 61-pole tooth I, 62-annular groove I, 7-permanent magnet, pole shoe in the middle of 8-, the right pole shoe of 9-, 91-pole tooth II, 92-
Annular groove II, 10-jump ring, 11-end cap, 12-annular groove III.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings.
A kind of notch cuttype 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 is installed on the middle part of axle 1, the left side of middle pole shoe 8 and right side
It is ladder being radially arranged along axle 1 respectively of hierarchic structure, left side and right side；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, arranges annular groove I62 between adjacent pole tooth I61；Described pole tooth I61 is along axle 1
Axially arranged, the side to each ladder of the left side of middle pole shoe 8 extends respectively, and the right side of each pole tooth I61 is with each
Leave gap between the side of individual ladder, described pole tooth I61 at axle 1 height radially less than the side of the ladder of its correspondence
Height；Described annular groove I62 arranges permanent magnet 7；
Arrange on the left side of described right pole shoe 9 pole tooth II91 and annular groove II92, described pole tooth II91 with in
Between the step number of right side of pole shoe 8 equal, between adjacent pole tooth II91, annular groove II92 is set；Described pole tooth II91
Axially arranged along axle 1, the side to each ladder of the right side of middle pole shoe 8 extends respectively, a left side of each pole tooth II91
Leave gap between end face and the side of each ladder, described pole tooth II91 at axle 1 height radially less than its correspondence
The height of the side of ladder；Described annular groove II92 arranges permanent magnet 7.
Described each annular groove I62 axial depth is different, and the axial depth of each annular groove I62 is at axle 1 outward
Progressively shoal on the direction of shell 2, and the difference of adjacent two annular groove I62 axial depth appointing equal to middle pole shoe 8 left end
The axial length of one ladder；Described each annular groove II92 axial depth is different, and each annular groove II92's is the deepest
Degree progressively shoals on the direction of shell 2 at axle 1, and the difference of adjacent two annular groove II92 axial depth is equal to dynode
The axial length of arbitrary ladder of boots 8 right-hand member.
The left side of described middle pole shoe 8 is mutually corresponding in mirror image with the hierarchic structure of right side, and each ladder
Axial length is equal.
Sealing device described in the utility model also includes that jump ring 10, magnetism-isolating loop, bearing 3, described jump ring 10 are installed on
On axle 1, it is positioned at the left and right sides of middle pole shoe 8；Magnetism-isolating loop is installed on the left side of left pole shoe 6 and the right side of right pole shoe 9 the most successively
With bearing 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, interior every
Magnet ring 4 is installed on axle 1, there is gap between inwall and the outer wall of interior magnetism-isolating loop 4 of outer magnetism-isolating loop 5, outer magnetism-isolating loop 5 and interior every
The axial length of magnet ring 4 is equal.
Described permanent magnet 7 is radial magnetizing type permanent magnet, the opposite polarity of two adjacent permanent magnets 7 on left pole shoe 6, right
The opposite polarity of two adjacent permanent magnets 7 on pole shoe 9.
The ladder quantity at described middle pole shoe about 8 two ends is respectively 2-7, and ladder height is 1-5mm.
The end face of pole tooth II91 and the side of ladder on middle pole shoe 8 on pole tooth I61 and right pole shoe 9 on described left pole shoe 6
Distance between face is 0.1-5mm.
Left pole shoe 6 and right pole shoe 9 outer ring surface are respectively provided with annular groove III12, are used for rubber seal is installed.
The installation process of sealing device described in the utility model is as follows: middle pole shoe 8 is installed on the middle part of axle 1；Will
Rubber ring is respectively installed in the annular groove III12 of left pole shoe 6 and right pole shoe 9 outer ring surface, at the annular groove of left pole shoe 6
Permanent magnet 7 is installed in I62, makes permanent magnet 7 opposite polarity in each annular groove I62, in the annular groove II92 of right pole shoe 9
Permanent magnet 7 is installed, makes permanent magnet 7 opposite polarity in annular groove II92；Magnetic fluid is injected separately into pole tooth I61 and pole tooth
The end face of II91；In the left side of middle pole shoe 8, jump ring 10, left pole shoe 6, magnetism-isolating loop, bearing 3 are installed successively, at middle pole shoe 8
Right side installs jump ring 10, right pole shoe 9, magnetism-isolating loop, bearing 3 successively；Axle 1 is installed shell 2, makes shell 2 cover above-mentioned installation
Part on axle 1, the inwall of shell 2 left end is close to be positioned at the bearing 3 in left side, and end cap 11 is by the screw thread with shell 2 right-hand member
Connect the outer ring compressing the bearing 3 being positioned at right side.
Claims (10)
1. a notch cuttype 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) is installed on the middle part of axle (1), a left side for middle pole shoe (8)
End face and right side are ladder being radially arranged along axle (1) respectively of hierarchic structure, left side and right side；Described left pole
Boots (6) are installed on the left side of middle pole shoe (8), and right pole shoe (9) is installed on the right side of middle pole shoe (8)；
On the right side of described left pole shoe (6), pole tooth I(61 is set) and annular groove I(62), described pole tooth I(61) and in
Between equal, the adjacent pole tooth I(61 of the step number of left side of pole shoe (8)) between annular groove I(62 is set)；Described pole tooth
I(61) axially arranged along axle (1), the side to each ladder of the left side of middle pole shoe (8) extends respectively, each pole tooth
I(61) gap, described pole tooth I(61 are left between right side and the side of each ladder) at axle (1) height radially
The height of side less than the ladder of its correspondence；Described annular groove I(62) in permanent magnet (7) is set；
On the left side of described right pole shoe (9), pole tooth II(91 is set) and annular groove II(92), described pole tooth II(91)
The pole tooth II(91 equal, adjacent with the step number of the right side of middle pole shoe (8)) between annular groove II(92 is set)；Described
Pole tooth II(91) axially arranged along axle (1), the side to each ladder of the right side of middle pole shoe (8) extends respectively,
Each pole tooth II(91) left side and the side of each ladder between leave gap, described pole tooth II(91) in axle (1) footpath
Height upwards is less than the height of the side of the ladder of its correspondence；Described annular groove II(92) in permanent magnet (7) is set.
2. notch cuttype 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 axle (1) toward on the direction of shell (2) progressively
Shoal, and adjacent two annular groove I(62) axial equal to arbitrary ladder of middle pole shoe (8) left end of the difference of axial depth
Length；Described each annular groove II(92) axial depth is different, each annular groove II(92) axial depth in axle (1)
Progressively shoaling on the direction of shell (2), and adjacent two annular groove II(92) difference of axial depth is equal to middle pole shoe
(8) axial length of arbitrary ladder of right-hand member.
3. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 1 or 2, it is characterised in that: described centre
The left side of pole shoe (8) is mutually corresponding in mirror image with the hierarchic structure of right side, and the axial length of each ladder is equal.
4. notch cuttype 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) is installed on axle (1), is positioned at the left and right sides of middle pole shoe (8).
5. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: also include magnetism-isolating loop,
Bearing (3), the left side of left pole shoe (6) and the right side of right pole shoe (9) install magnetism-isolating loop and bearing (3) the most successively.
6. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 5, it is characterised in that: described magnetism-isolating loop bag
Including outer magnetism-isolating loop (5) and interior magnetism-isolating loop (4), outer magnetism-isolating loop (5) is installed on the inwall of shell (2), and interior magnetism-isolating loop (4) is installed on axle
(1), on, between inwall and the outer wall of interior magnetism-isolating loop (4) of outer magnetism-isolating loop (5), there is gap, outer magnetism-isolating loop (5) and interior magnetism-isolating loop
(4) axial length is equal.
7. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: described permanent magnet
(7) being radial magnetizing type permanent magnet, the opposite polarity of the upper two adjacent permanent magnets (7) of left pole shoe (6), right pole shoe (9) is upper adjacent
The opposite polarity of two permanent magnets (7).
8. notch cuttype 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 at two ends, left and right is respectively 2-7, and ladder height is 1-5mm.
9. notch cuttype 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) and the upper pole tooth II(91 of right pole shoe (9)) end face go up with centre pole shoe (8) between the side of ladder away from
From being 0.1-5mm.
10. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: at left pole shoe (6) and
It is respectively provided with annular groove III(12 on right pole shoe (9) outer ring surface), it is used for rubber seal is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620810452.0U CN205824190U (en) | 2016-07-29 | 2016-07-29 | A kind of notch cuttype end-surface type magnetic fluid seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620810452.0U CN205824190U (en) | 2016-07-29 | 2016-07-29 | A kind of notch cuttype end-surface type magnetic fluid seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205824190U true CN205824190U (en) | 2016-12-21 |
Family
ID=57556596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620810452.0U Withdrawn - After Issue CN205824190U (en) | 2016-07-29 | 2016-07-29 | A kind of notch cuttype end-surface type magnetic fluid seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205824190U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015586A (en) * | 2016-07-29 | 2016-10-12 | 广西科技大学 | Stepped end face type magnetic fluid sealing device |
| CN108488390A (en) * | 2018-02-11 | 2018-09-04 | 广西科技大学 | A kind of magnetic fluid sealing structure |
| CN108843793A (en) * | 2018-09-03 | 2018-11-20 | 广西科技大学 | A kind of concave-convex type device for sealing magnetic fluid |
| CN113090760A (en) * | 2021-04-07 | 2021-07-09 | 北京交通大学 | Magnetic liquid sealing device |
-
2016
- 2016-07-29 CN CN201620810452.0U patent/CN205824190U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015586A (en) * | 2016-07-29 | 2016-10-12 | 广西科技大学 | Stepped end face type magnetic fluid sealing device |
| CN108488390A (en) * | 2018-02-11 | 2018-09-04 | 广西科技大学 | A kind of magnetic fluid sealing structure |
| CN108843793A (en) * | 2018-09-03 | 2018-11-20 | 广西科技大学 | A kind of concave-convex type device for sealing magnetic fluid |
| CN113090760A (en) * | 2021-04-07 | 2021-07-09 | 北京交通大学 | Magnetic liquid sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161221 Effective date of abandoning: 20170929 |